Paired or fused ganglion-like bodies in the head of insects. The bodies secrete hormones important in the regulation of metamorphosis and the development of some adult tissues.
Compounds, either natural or synthetic, which block development of the growing insect.
Major egg yolk proteins from egg-laying animals such as non-mammalian VERTEBRATES; ARTHROPODS; and others. They are high-density lipoglycoproteins derived from circulating precursors, VITELLOGENINS. Vitellins serve as nutrients for the growing non-mammalian embryos (EMBRYO, NONMAMMALIAN).
Insects of the order Dictyoptera comprising several families including Blaberidae, BLATTELLIDAE, Blattidae (containing the American cockroach PERIPLANETA americana), Cryptocercidae, and Polyphagidae.
A colorless liquid extracted from oils of plants such as citronella, neroli, cyclamen, and tuberose. It is an intermediate step in the biological synthesis of cholesterol from mevalonic acid in vertebrates. It has a delicate odor and is used in perfumery. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
A large order of insects comprising the butterflies and moths.
Hormones secreted by insects. They influence their growth and development. Also synthetic substances that act like insect hormones.
The yellow body derived from the ruptured OVARIAN FOLLICLE after OVULATION. The process of corpus luteum formation, LUTEINIZATION, is regulated by LUTEINIZING HORMONE.
A genus of mosquitoes (CULICIDAE) frequently found in tropical and subtropical regions. YELLOW FEVER and DENGUE are two of the diseases that can be transmitted by species of this genus.
A system of NEURONS that has the specialized function to produce and secrete HORMONES, and that constitutes, in whole or in part, an ENDOCRINE SYSTEM or organ.
Broad plate of dense myelinated fibers that reciprocally interconnect regions of the cortex in all lobes with corresponding regions of the opposite hemisphere. The corpus callosum is located deep in the longitudinal fissure.
Peptides released by NEURONS as intercellular messengers. Many neuropeptides are also hormones released by non-neuronal cells.
Proteins found in any species of insect.
Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.
Birth defect that results in a partial or complete absence of the CORPUS CALLOSUM. It may be isolated or a part of a syndrome (e.g., AICARDI'S SYNDROME; ACROCALLOSAL SYNDROME; ANDERMANN SYNDROME; and HOLOPROSENCEPHALY). Clinical manifestations include neuromotor skill impairment and INTELLECTUAL DISABILITY of variable severity.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Ductless glands that secrete HORMONES directly into the BLOOD CIRCULATION. These hormones influence the METABOLISM and other functions of cells in the body.
The class Insecta, in the phylum ARTHROPODA, whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth; several hundred thousand different kinds having been described. Three orders, HEMIPTERA; DIPTERA; and SIPHONAPTERA; are of medical interest in that they cause disease in humans and animals. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p1)
Juvenile hormone analog and insect growth regulator used to control insects by disrupting metamorphosis. Has been effective in controlling mosquito larvae.
Slender-bodies diurnal insects having large, broad wings often strikingly colored and patterned.
Copies of a work or document distributed to the public by sale, rental, lease, or lending. (From ALA Glossary of Library and Information Science, 1983, p181)
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
The influence of study results on the chances of publication and the tendency of investigators, reviewers, and editors to submit or accept manuscripts for publication based on the direction or strength of the study findings. Publication bias has an impact on the interpretation of clinical trials and meta-analyses. Bias can be minimized by insistence by editors on high-quality research, thorough literature reviews, acknowledgement of conflicts of interest, modification of peer review practices, etc.
A publication issued at stated, more or less regular, intervals.
The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)
Simultaneous or successive publishing of identical or near- identical material in two or more different sources without acknowledgment. It differs from reprinted publication in that a reprint cites sources. It differs from PLAGIARISM in that duplicate publication is the product of the same authorship while plagiarism publishes a work or parts of a work of another as one's own.
Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)
A suborder of HEMIPTERA, called true bugs, characterized by the possession of two pairs of wings. It includes the medically important families CIMICIDAE and REDUVIIDAE. (From Dorland, 28th ed)
The active production and accumulation of VITELLINS (egg yolk proteins) in the non-mammalian OOCYTES from circulating precursors, VITELLOGENINS. Vitellogenesis usually begins after the first MEIOSIS and is regulated by estrogenic hormones.
A primitive form of digestive gland found in marine ARTHROPODS, that contains cells similar to those found in the mammalian liver (HEPATOCYTES), and the PANCREAS.
A subspecialty of internal medicine concerned with the metabolism, physiology, and disorders of the ENDOCRINE SYSTEM.
The system of glands that release their secretions (hormones) directly into the circulatory system. In addition to the ENDOCRINE GLANDS, included are the CHROMAFFIN SYSTEM and the NEUROSECRETORY SYSTEMS.
Pathological processes of the ENDOCRINE GLANDS, and diseases resulting from abnormal level of available HORMONES.
Elements, compounds, mixtures, or solutions that are considered severely harmful to human health and the environment. They include substances that are toxic, corrosive, flammable, or explosive.
Insect members of the superfamily Apoidea, found almost everywhere, particularly on flowers. About 3500 species occur in North America. They differ from most WASPS in that their young are fed honey and pollen rather than animal food.
Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.
A sweet viscous liquid food, produced in the honey sacs of various bees from nectar collected from flowers. The nectar is ripened into honey by inversion of its sucrose sugar into fructose and glucose. It is somewhat acidic and has mild antiseptic properties, being sometimes used in the treatment of burns and lacerations.
Sugar-rich liquid produced in plant glands called nectaries. It is either produced in flowers or other plant structures, providing a source of attraction for pollinating insects and animals, as well as being a nutrient source to animal mutualists which provide protection of plants against herbivores.
A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis.
The systematic study of the complete complement of proteins (PROTEOME) of organisms.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Exogenous agents, synthetic and naturally occurring, which are capable of disrupting the functions of the ENDOCRINE SYSTEM including the maintenance of HOMEOSTASIS and the regulation of developmental processes. Endocrine disruptors are compounds that can mimic HORMONES, or enhance or block the binding of hormones to their receptors, or otherwise lead to activating or inhibiting the endocrine signaling pathways and hormone metabolism.
Tumors or cancer of the ENDOCRINE GLANDS.
Chemical substances having a specific regulatory effect on the activity of a certain organ or organs. The term was originally applied to substances secreted by various ENDOCRINE GLANDS and transported in the bloodstream to the target organs. It is sometimes extended to include those substances that are not produced by the endocrine glands but that have similar effects.
A branch of biology dealing with the structure of organisms.

Antidiuretic effects of a factor in brain/corpora cardiaca/corpora allata extract on fluid reabsorption across the cryptonephric complex of Manduca sexta. (1/39)

Extracts of the brain/corpora cardiaca/corpora allata (Br/CC/CA) complex of Manduca sexta larvae elicit an antidiuretic effect, measured by an increase in fluid reabsorption across the cryptonephric complex of larval M. sexta. Separation of the extract by reversed-phase liquid chromatography gave two fractions with antidiuretic effects. The more potent of these two factors was further characterized for its effects on the cryptonephric complex. Its antidiuretic effect is not inhibited by bumetanide, a drug that inhibits M. sexta diuretic hormone (Mas-DH)-stimulated fluid reabsorption. These data indicate that the mechanism of the antidiuretic effect of the factor is different from that of Mas-DH on the cryptonephric complex. The basal reabsorption of the cryptonephric complex is blocked when treated on the lumen side with bafilomycin A(1), an inhibitor of the H(+)-ATPase, or with amiloride, an inhibitor of the H(+)/K(+) antiporter. However, the antidiuretic-factor-stimulated fluid reabsorption is not affected by either bafilomycin A(1) or amiloride. The increase in reabsorption triggered by the semi-purified factor can be inhibited by Cl(-) channel blockers or by removing Cl(-) from the lumen side of the cryptonephric complex. It appears that this factor activates a Cl(-) pump associated with the cryptonephric complex. Forskolin mimics the effect of this factor on fluid reabsorption, and the effect of forskolin is not inhibited by bumetanide. A selective and potent inhibitor of protein kinase A, H-89, also inhibits antidiuretic-factor-stimulated fluid reabsorption. Addition of the factor to cryptonephric complexes maintained in vitro caused a significant increase in cyclic AMP levels extracted from these tissues compared with values for controls. These data suggest that the antidiuretic effect of the factor in Br/CC/CA extract is mediated by cyclic AMP.  (+info)

A mutant Drosophila insulin receptor homolog that extends life-span and impairs neuroendocrine function. (2/39)

The Drosophila melanogaster gene insulin-like receptor (InR) is homologous to mammalian insulin receptors as well as to Caenorhabditis elegans daf-2, a signal transducer regulating worm dauer formation and adult longevity. We describe a heteroallelic, hypomorphic genotype of mutant InR, which yields dwarf females with up to an 85% extension of adult longevity and dwarf males with reduced late age-specific mortality. Treatment of the long-lived InR dwarfs with a juvenile hormone analog restores life expectancy toward that of wild-type controls. We conclude that juvenile hormone deficiency, which results from InR signal pathway mutation, is sufficient to extend life-span, and that in flies, insulin-like ligands nonautonomously mediate aging through retardation of growth or activation of specific endocrine tissue.  (+info)

Juvenile hormone regulation of longevity in the migratory monarch butterfly. (3/39)

Monarch butterflies (Danaus plexippus) of eastern North America are well known for their long-range migration to overwintering roosts in south-central Mexico. An essential feature of this migration involves the exceptional longevity of the migrant adults; individuals persist from August/September to March while their summer counterparts are likely to live less than two months as adults. Migrant adults persist during a state of reproductive diapause in which both male and female reproductive development is arrested as a consequence of suppressed synthesis of juvenile hormone. Here, we describe survival in monarch butterflies as a function of the migrant syndrome. We show that migrant adults are longer lived than summer adults when each are maintained under standard laboratory conditions, that the longevity of migrant adults is curtailed by treatment with juvenile hormone and that the longevity of summer adults is increased by 100% when juvenile hormone synthesis is prevented by surgical removal of its source, the corpora allatum. Thus, monarch butterfly persistence through a long winter season is ensured in part by reduced ageing that is under endocrine regulation, as well as by the unique environmental properties of their winter roost sites. Phenotypic plasticity for ageing is an integral component of the monarch butterflies' migration-diapause syndrome.  (+info)

Insect NMDA receptors mediate juvenile hormone biosynthesis. (4/39)

In vertebrates, the N-methyl-D-aspartate subtype of glutamate receptors (NMDAR) appears to play a role in neuronal development, synaptic plasticity, memory formation, and pituitary activity. However, functional NMDAR have not yet been characterized in insects. We have now demonstrated immunohistochemically glutamatergic nerve terminals in the corpora allata of an adult female cockroach, Diploptera punctata. Cockroach corpus allatum (CA) cells, exposed to NMDA in vitro, exhibited elevated cytosolic [Ca(2+)], but not in culture medium nominally free of calcium or containing NMDAR-specific channel blockers: MK-801 and Mg(2+). Sensitivity of cockroach corpora allata to NMDA changed cyclically during the ovarian cycle. Highly active glands of 4-day-old mated females, exposed to 3 microM NMDA, produced 70% more juvenile hormone (JH) in vitro, but the relatively inactive glands of 8-day-old mated females showed little response to the agonist. The stimulatory effect of NMDA was eliminated by augmenting the culture medium with MK-801, conantokin, or high Mg(2+). Having obtained substantive evidence of functioning NMDAR in insect corpora allata, we used reverse transcription PCR to demonstrate two mRNA transcripts, DNMDAR1 and DNMDAR2, in the ring gland and brain of last-instar Drosophila melanogaster. Immunohistochemical labeling, using mouse monoclonal antibody against rat NMDAR1, showed that only one of the three types of endocrine cells in the ring gland, CA cells, expressed rat NMDAR1-like immunoreactive protein. This antibody also labeled two brain neurons in the lateral protocerebrum, one neuron per brain hemisphere. Finally, we used the same primers for DNMDAR1 to demonstrate a fragment of putative NMDA receptor in the corpora allata of Diploptera punctata. Our results suggest that the NMDAR has a role in regulating JH synthesis and that ionotropic-subtype glutamate receptors became specialized early in animal evolution.  (+info)

In vivo membrane trafficking role for an insect N-ethylmaleimide-sensitive factor which is developmentally regulated in endocrine cells. (5/39)

The hexameric ATPase, N-ethylmaleimide-sensitive factor (NSF) is implicated in the release of neurotransmitters and in mediating fusion between intracellular membranes. Due to the conservation of proteins in constitutive and regulated membrane fusion reactions, NSF and its downstream targets have been predicted also to participate in fusion reactions underlying endocrine function, but there is little experimental evidence to support such a role for NSF in insect neuroendocrine secretion. Here we have characterized the NSF orthologue (MsNSF) from the endocrine model for development Manduca sexta. MsNSF is developmentally regulated in endocrine organs of the protocerebral complex. Enrichment of MsNSF in corpora cardiaca (CC) and not in corpora allata (CA) indicates that it might play a preferential role in releasing hormones produced in CC. Endocrine/paracrine cells of the enteric system in M. sexta exhibit selective MsNSF enrichment. Together the data point to a more selective participation of MsNSF in development of M. sexta by its involvement in a subset of factors, whereas other as-yet-unidentified homolog(s) might regulate secretion from CA and a large set of endocrine/paracrine cells. We further characterized the in vivo role of MsNSF by heterologous expression. In contrast to vertebrate NSF, MsNSF is functional in yeast membrane fusion in vivo. MsNSF rectifies defects in SEC18 (yeast NSF homologue) at nearly all discernible steps where Sec18p has been implicated in the biosynthetic route. This underscores the utility of our approach to delineate functional roles for proteins from systems that are not currently amenable to in vitro reconstitution.  (+info)

The retinoic-like juvenile hormone controls the looping of left-right asymmetric organs in Drosophila. (6/39)

In vertebrate development, the establishment of left-right asymmetry is essential for sidedness and the directional looping of organs like the heart. Both the nodal pathway and retinoic acid play major and conserved regulatory roles in these processes. We carried out a novel screen in Drosophila to identify mutants that specifically affect the looping of left-right asymmetric organs. We report the isolation of spin, a novel mutant in which the looping of the genitalia and spermiduct are incomplete; under-rotation of the genitalia indicates that spin controls looping morphogenesis but not direction, thus uncoupling left-right asymmetry and looping morphogenesis. spin is a novel, rotation-specific allele of the fasciclin2 (Fas2) gene, which encodes a cell-adhesion protein involved in several aspects of neurogenesis. In spin mutants, the synapses connecting specific neurosecretory cells to the corpora allata are affected. The corpus allatum is part of the ring gland and is involved in the control of juvenile hormone titers during development. Our genetic and pharmacological results indicate that Fas2(spin) rotation defects are linked to an abnormal endocrine function and an elevated level of juvenile hormone. As juvenile hormone is an insect sesquiterpenoid related to retinoic acid, these results establish a new genetic model for studying organ looping and demonstrate an evolutionarily conserved role for terpenoids in this process.  (+info)

Stimulation of JH biosynthesis by the corpora allata of adult female Aedes aegypti in vitro: effect of farnesoic acid and Aedes allatotropin. (7/39)

Previous studies have demonstrated that the synthesis of juvenile hormone (JH) by the isolated corpora allata (CA) complex in vitro as well as the JH titer in the yellow fever mosquito Aedes aegypti are elevated before feeding and low after a blood meal. In the present study, we used an in vitro radiochemical assay to analyze the effect of farnesoic acid (FA) and Aedes allatotropin (Aedes-AT) on the biosynthesis of JH and methyl farnesoate (MF) by the isolated CA complex of A. aegypti adult female. CA complex from day-0 females (0-1 h after emergence) exhibited a low basal juvenile hormone III (JH III) biosynthetic activity and did not respond to either allatotropic or FA stimulation. However, incubation of CA complexes from newly emerged females with Aedes-AT plus FA resulted in very high production of JH III. This is the first report suggesting that allatotropin makes corpora allata in newly emerged females capable for JH biosynthesis. When we studied CA complexes dissected from females 1 day after emergence, the stimulatory action of Aedes-AT was strong and dose-dependent, with maximum stimulation in the range of 10(-8)-10(-9) mol l(-1), suggesting that Aedes-AT is indeed a true allatotropin (a molecule with allatotropic activity) in A. aegypti. The addition to the culture medium of 40 micro mol l(-1) FA, a JH precursor, resulted in a 9-fold increase in JH III biosynthesis in 2-, 4- and 6-day-old sugar-fed females. The two major labeled products synthesized by the stimulated CA complex were identified as JH III and MF by RP-HPLC and GC-MS. Treatment of CA complexes with FA, but not Aedes-AT, resulted in an increase in MF. Application of both Aedes-AT and FA to the CA complexes of 2-, 4- and 6-day-old females resulted in the same effects as FA alone. These data suggest that in sugar-fed females, FA and Aedes-AT exert different effects on the terminal steps in JH biosynthesis.  (+info)

Juvenile hormone and division of labor in honey bee colonies: effects of allatectomy on flight behavior and metabolism. (8/39)

Three experiments were performed to determine why removal of the corpora allata (the glands that produce juvenile hormone) causes honey bees to fail to return to their hive upon initiating flight. In Experiment 1, the naturally occurring flights of allatectomized bees were tracked with radar to determine whether the deficit is physical or cognitive. The results indicated a physical impairment: allatectomized bees had a significantly slower ground speed than sham and untreated bees during orientation flights, but otherwise attributes such as flight range and area were normal. Flight impairment was confirmed in Experiment 2, based on observations of takeoff made in the field at the hive entrance. The allatectomized group had a significantly smaller percentage of flightworthy bees than did the sham and untreated groups. Experiment 3 confirmed the flight impairment in laboratory tests and showed that allatectomy causes a decrease in metabolic rate. Allatectomized bees had significantly lower metabolic rates than untreated and sham bees, while allatectomized bees receiving hormone replacement had intermediate values. These results indicate that allatectomy causes flight impairment, probably partly due to effects on metabolic rate. They also suggest that juvenile hormone plays an additional, previously unknown, role in coordinating the physiological underpinning of division of labor in honey bee colonies.  (+info)

Juvenile hormones (JHs) are key regulators of both metamorphosis and adult reproductive processes. The role of two key enzymes in the biosynthetic pathway of JH were examined: Farnesoic Acid O-Methyltransferase (FAMeT) and Juvenile Hormone Acid Methyltransferase (JHAMT). In crustaceans, FAMeT has been found to methylate farnesoic acid (FA), producing methyl farnesoate (MF) prior to epoxidation at the penultimate stage of JH biosynthesis. JHAMT was discovered more recently in the silkworm Bombyx mori and converts epoxidated FA (JHacids) to active JH through methylation using S-adenosyl-L-methionine (SAM). The aim of the proposed research is to examine the influence of a) decreasing the amount of FAMeT produced using an enhancer trapping P-element and b) increasing the levels of JHAMT and FAMeT in specific tissues using GAL4 overexpression techniques. Immunohistochemical analysis was used to confirm the presence of FAMeT in the CA of D. melanogaster ring glands. Analysis of MF, JHIII and JHB3 ...
We investigated the role of head factors and allatostatins (ASs) on the regulation of juvenile hormone (JH) synthesis in female adult mosquito. The biosynthetic activity of the Aedes aegypti corpora allata (CA) in vitro was inhibited by factors present in the head. Disconnecting the CA from the brain resulted in a significant increase in the rate of JH biosynthesis. Inhibition was not dependent on intact nervous connections; co-incubation of CA with brains or brain extracts resulted in a significant decrease of JH biosynthesis. This inhibitory effect of brain extracts was reversible and heat stable; extracts lost the inhibitory activity after proteinase K digestion suggesting a peptidic structure. In a first attempt to elucidate the nature of this inhibitory factor, we tested in our CA in vitro system the effect of members of two families of allatostatins already described in mosquitoes. Anopheles gambiae PISCF-allatostatin (homolog to Manduca PISCF-allatostatin) significantly inhibited JH synthesis,
Read Inhibition of DD2R gene expression in the corpus allatum activates alkaline phosphatase in female Drosophila melanogaster, Russian Journal of Genetics on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The corpora allata, another pair of neurohemal organs, lie just behind the corpora cardiaca. They manufacture juvenile hormone (JH for short), a compound that inhibits development of adult characteristics during the immature stages and promotes sexual maturity during the adult stage. Neurosecretory cells in the brain regulate activity of the corpora allata - stimulating them to produce JH during larval or nymphal instars, inhibiting them during the transition to adulthood, and reactivating them once the adult is ready for reproduction. The chemical structure of juvenile hormone is rather unusual: it is a sesquiterpene compound - more similar to defensive chemicals found in pine trees than to any other animal hormone.. The neurosecretory cells are found in clusters, both medially and laterally in the insects brain. Axons from these cells can be traced along tiny nerves that run to the corpora cardiaca and corpora allata. The cells produce and secrete brain hormone, a low-molecular-weight peptide ...
Abstract The influence of methyl farnesoate (MF) in the regulation of molt and gonad development in the crab Oziotelphusa senex senex was investigated. Injection of methyl farnesoate into female and male crabs significantly (P | 0.0001) increased mean oocyte diameter (236.37%) and testicular follicle diameter (25.72%) as well as mean gonad indices (females 1304.35%; males 38.00%) and also accelerated the molting (females 80%; males 100%). These results provide strong evidence that methyl farnesoate is involved in the control of both molting and reproduction in crabs.
JH is an important regulator of insect development, physiology and behavior. While in many insect species JH functions in the adult as a gonadotropin, in some highly eusocial insects its role has shifted to regulate social behavior (Barth et al., 1975; Hartfelder and Engels, 1998; Bloch et al., 2000b; Hartfelder, 2000; Giray et al., 2005; Amsalem et al., 2014). In bumble bees, which are considered to be primitively eusocial (Michener, 1974), JH seemed to retain its role in reproduction but was also suggested to mediate aggression and dominance behavior (Roseler, 1977; Van Doorn, 1986; Bloch et al., 2000b). However, little is known about the association between JH, aggression and ovary activation and the effect of rank within the social structure on these parameters. The present study investigated the effect of the JH inhibitor precocene-I on JH titer and consequently on reproduction, aggression and pheromone production in queenless workers of the bumble bee B. terrestris.. Our results clearly ...
Growth, Insect, Insects, Life, Affect, Corpora Allata, Corpus Allatum, Growth And Development, Hormones, Juvenile Hormones, Morphogenesis, Neuropeptide, Neuropeptides, Peptides, Production, Regulation, Role, Time, Aphid, Aphids
The genes encoding the S. frugiperda allatotropin (Spofr-AT), allatostatin (Spofr-AST), allatostatin type-A (Spofr-AST A) peptide family and allatotropin 2 (Spofr-AT 2) peptides were isolated from S. frugiperda brain cDNA. The Spofr-AT gene is expressed in three mRNA isoforms with 134, 171, and 200 amino acids, respectively, differing from each other by alternative splicing. The Spofr-AST cDNA encodes 125 amino acid residues including one copy of the Manse-AST mature peptide (type-C allatostatin). The deduced precursor sequence of Spofr-AST A gene contains 231 amino acids and allowed unambiguous identification of nine (or ten) peptides of YFXFGL-a peptide family, which are tandemly arranged in three blocks. A cDNA that encodes 53 amino acids was cloned from S. frugiperda brain cDNA, including one copy of a non-amidated decapeptide (Arg-Val-Arg-Gly-Asn-Pro-Ile-Ser-Cys-Phe-OH). This peptide strongly stimulates the synthesis and release of juvenile hormone (JH) in vitro by the corpora allata (CA) ...
B. G. Unni, Ken E. Peck, M. M. Pytel, K. H. Dahm, G. Bhaskaran, H. Ranjit Singh, Y. Kakoty, B. Devi and S. B. Wann (2009). Dimethyl sulphoxide inhibits in vitro synthesis of juvenile hormone I and II and stimulates juvenile hormone III by corpora allata of insects. Current Science, Vol. 96, No. 8, 25 April 2009 ...
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Transgenic tomato expressing dsRNA of juvenile hormone acid O-methyl transferase gene of Helicoverpa armigera (Lepidoptera: Noctuidae) affects larval growth and its development ...
Juvenile hormones (JHs) are a group of acyclic sesquiterpenoids that regulate many aspects of insect physiology. JHs regulate development, reproduction, diapause, and polyphenisms. In insects, JH (formerly called neotenin) refers to a group of hormones, which ensure growth of the larva, while preventing metamorphosis. Because of their rigid exoskeleton, insects grow in their development by successively shedding their exoskeleton (a process known as molting). Juvenile hormones are secreted by a pair of endocrine glands behind the brain called the corpora allata. JHs are also important for the production of eggs in female insects. JH was discovered in 1965 and the first molecular structure of a final six was solved in 1967. Most insect species contain only juvenile growth hormone (JH) III. To date JH 0, JH I, and JH II have been identified only in the Lepidoptera (butterflies and moths). The form JHB3 (JH III bisepoxide) appears to be the most important JH in the Diptera, or flies. Certain species ...
Citation: N/A Interpretive Summary: Technical Abstract: Activity of corpora allata (CA) of the fire bug, Pyrrhocoris apterus (Heteroptera), was determined in vitro by measurement of the radioactive nonpolar compounds released into incubation medium containing 3H-methionine. The CA of adult females had little or no activity. Supplementation of farnesol specifically enhanced radioactivity in an unknown product (Un) that is different from the known juvenile hormones (JHs). The rate of production of Un by the CA in vitro was correlated with the effect of the CA on ovarian maturation in vivo. Therefore the Un could be a good candidate for the heteropteran JH that has not yet been identified. In vitro production of Un is regulated by the pars intercerebralis of the brain. Based on surgical interventions to the neuroendocrine system in vivo and in vitro, slow (irreversible in vitro) and fast (reversible in vitro) regulation of the CA can be distinguished. The slow stimulation or inhibition is ...
Confocal laser-scanning microscopy was used to carry out a comparative study of the immunostaining for three families of neuropeptides, viz., allatostatin-A (AS-A), allatostatin-C (AS-C) and allatotropin (AT), in adult female mosquitoes of Aedes aegypti and Anopheles albimanus. The specific patterns of immunostaining for each of the three peptides were similar in both species. The antisera raised against AT, AS-A, and AS-C revealed intense immunoreactivity in the cells of each protocerebral lobe of the brain and stained cells in each of the ventral ganglia and neuronal projections innervating various thoracic and abdominal tissues. Only the AS-A antiserum labeled immunoreactive endocrine cells in the midgut. The distribution of the peptides supports the concept that they play multiple regulatory roles in both species.
A female Aedes aegypti mosquito, known to be a carrier of the Zika virus. A promising new approach to fighting the Zika virus through the release of genetically modified mosquitoes won preliminary approval from the Food and Drug Administration Friday. After reviewing thousands of public comments over
Juvenile hormone (JH) acid methyltransferase (JHAMT) is an enzyme that converts JH acids or inactive precursors of JHs to active JHs at the final step of JH ...
Located on the Fitzsimons Life Science Campus in Aurora, Colorado, we are a dedicated, friendly, hard working team of scientists, committed to providing you with the highest quality antibodies and customer support in the business.. ...
The Corrositex® assay is a standardized and quantitative in vitro test developed as a replacement for the dermal corrosivity rabbit test. The Corrositex kit, manufactured by In Vitro International (IVI), uses a proprietary biobarrier membrane to model the skin for evaluating the potential dermal corrosivity of a test material. A test material is evaluated based on its penetration through the biobarrier membrane into a Chemical Detection System (CDS). The time required for the test material to break through the biobarrier and into the CDS is... Corrositex , Dermal , Skin Irritation Corrosion Screening , Skin Irritation Test ...
Background The cladoceran crustacean Daphnia pulexproduces female offspring by parthenogenesis under favorable conditions, but in response to various unfavorable external stimuli, it produces male...
Female A. domesticus exhibit variability in their phonotactic behavior. Some females respond to syllable periods (SPs) typical of the males calling song (CS; 50-70 ms), others respond additionally to CSs with shorter or longer SPs, outside the range of males calls. Other females are not selective to SP and respond to the full range of SPs. Nanoinjection of Juvenile Hormone III (JHIII) into the prothoracic ganglion increases phonotactic selectivity. Nanoinjection of chelerythrine chloride (a protein kinase C inhibitor) reduces the effect of JHIII. The L3 prothoracic interneuron responds selectively to the SP of the males CS and is proposed to be involved in controlling SP-selective phonotaxis. Prothoracic nanoinjection of JHIII increases selective responses of L3 which parallels its effects on phonotaxis. This increase in selectivity seems to result from a decrease in decrement, predominantly at the shorter and longer SPs. Such effects increase selectivity in response to the SPs that are most
Juvenile hormone (JH) is one of the principal hormones that regulate insect development and reproduction. Accumulating evidence suggests that Methoprene-tolerant (Met) protein is a nuclear receptor of JH. Work by others has shown that Met is capable of binding JH at physiological concentration. An RNAi knockdown of Met causes down-regulated expression of JH-responsive genes and a phenotype similar to that observed in JH-deficient insects, suggesting that Met is required for mediating physiological and molecular responses to JH. The work in this report aims to understand the mechanisms underlying gene regulation by JH via Met. Met is a bHLH-PAS (basic-helix-loop-helix Per-ARNT-Sim) family protein. Many proteins in this family function as heterodimers formed with other proteins of this family. In a yeast two-hybrid screening, we discovered that another bHLH-PAS family protein, FISC, interacts with Met in the presence of JH. FISC is also required for JH functions as an RNAi knockdown of FISC ...
Termites are highly eusocial insects and show a division of labor whereby morphologically distinct individuals specialize in distinct tasks. In the lower termite Reticulitermes flavipes (Rhinotermitidae), non-reproducing individuals form the worker and soldier castes, which specialize in... Differential impacts of juvenile hormone, soldier head extract and alternate caste phenotypes on host and symbiont transcriptome composition…
2010 05 10.37073 14 24 17.699 -01 03 37.46 22.8G 10JH210 F51 C~3457 2010 05 11.35872 14 24 12.557 -01 03 16.29 22.0G 10JH210 F51 C~3457 2010 05 12.46626 14 24 06.812 -01 02 53.28 21.1G 10JH210 F51 C~3457 2011 04 30.39795 14 32 03.464 -01 41 14.24 22.5G 10JH210 F51 C~3457 2011 04 30.41148 14 32 03.395 -01 41 13.84 22.6G 10JH210 F51 C~3457 2011 04 30.42655 14 32 03.307 -01 41 13.41 22.3G 10JH210 F51 C~3457 2011 04 30.44018 14 32 03.239 -01 41 13.15 22.5G 10JH210 F51 C~3457 2011 05 13.39797 14 30 54.186 -01 36 06.03 23.5G 10JH210 F51 C~3457 2012 04 27.52683 14 39 12.624 -02 16 04.36 22.8G 10JH210 F51 C~3457 2012 05 18.36306 14 37 21.079 -02 08 04.41 22.4G 10JH210 F51 C~3457 2012 05 18.37662 14 37 21.005 -02 08 04.01 22.2G 10JH210 F51 C~3457 2012 05 18.39022 14 37 20.933 -02 08 03.87 22.5G 10JH210 F51 C~3457 2012 05 18.40388 14 37 20.859 -02 08 03.59 22.1G 10JH210 F51 C~3457 2013 05 10.38904 14 45 07.984 -02 45 03.50 22.4G 10JH210 F51 C~3457 2013 05 10.40390 14 45 07.904 -02 45 03.09 22.1G 10JH210 ...
Folkeringa-de Wijs MA, Dekker JH. Streptokokken uit groep B bij zwangeren. Huisarts Wet 2012;55(9):412-6.Groep B hemolytische streptokokke
TY - JOUR. T1 - Pineal biosynthetic activity and neuroendocrine physiology in the aging hamster and gerbil. AU - Reiter, Russel J.. AU - Johnson, Linda Y.. AU - Steger, Richard W.. AU - Richardson, Bruce A.. AU - Petterborg, Larry J.. PY - 1980. Y1 - 1980. N2 - The effects of advancing age on the ability of the pineal gland to produce melatonin and on the neuroendocrine physiology of Syrian hamsters and Mongolian gerbils were investigated. In 2-month-old male and female hamsters the nocturnal rise in pineal melatonin levels is on the order of 8-fold. As hamsters age the nighttime increases become progressively more depressed until in 18-month-old animals the nighttime rise in pineal melatonin is only twice the levels measured during the daylight hours. In male gerbils, the normal nocturnal increase in pineal melatonin levels observed in 2-month-old animals has completely disappeared by the time gerbils reach 19 months of age. The results suggest a marked reduction in pineal biosynthetic activity ...
Nine strains of dengue-2 virus were recovered from 27 pools of female Aedes aegypti collected from two localities in Colombia at a time when dengue-like disease was prevalent, or had occurred during previous weeks.
The Golm Metabolome Database (GMD) facilitates the search for and dissemination of mass spectra from biologically active metabolites quantified using GC-MS.
Looking for Chickangunya? Find out information about Chickangunya. viral disease transmitted by the bite of an infected female Aedes mosquito. Symptoms appear after an incubation period of four to eight days and include... Explanation of Chickangunya
Pyrolatrous was formed in 2012 by Nicholas Palmirotto (also of HULL), who wrote and recorded 3 songs with Joel Stallings (also of Radiation Blackb...
The most common reason of Adernalectomy is excess hormone production by a tumor located within the adrenal . The Laproscopic Adernalectomy surgery in Delhi.
Abstract: Dengue hemorrhagic fever has been one of the major health problems in Indonesia. As the disease spreads out by Aedes aegypti, a variety of ways has been conducted to disconnect host, agent, and the environment chain including prevention of human contact with the vector using by various repellents. The present test compared the complete protection time of N,N-diethyl- 3-metatoluamide (DEET) and citronella oil impregnated in wet tissue against Aedes aegypti. For this test, an ethanol-based 12.5% DEET and 20% citronella oil were prepared, into which dry tissue papers were immersed, drain in open air, and then stored in aluminum foil packs for one day and one week. Meanwhile, a number of disease-free adult female Aedes aegypti were placed in mosquito cages. The prepared one-day and oneweek stored wet tissues were used to swab volunteer adult human hands (from elbow to wrist) which were then inserted into the mosquito cage in three replicates (25 mosquitoes each cage). Elapsed time from ...
The secretion of corpora allata maintains the juvenile features in the larval stage, helps in the oocyte formation in adult females and influences the secretion from secondary sexual organs in both the sexes. The nervous system can be divided into two major regions: the central and peripheral nervous systems. While it is strongly developed in the anterior region of crop, colon and rectum. Journal of Toxicology. Each area acts as a simple eye and is responsible for detecting light. Habit and Habitat of Periplaneta 3. The lon-gitudinal muscles are narrow in the posterior region of crop and in the mid gut. (d) Sense organs are represented by compound eyes, ocellus, cuticular hair, chordotonal organs etc. This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. The effects of 1,4-naphthoquinones and several sulphydryl reagents on endogenous nerve activity in the central nervous sytem of Periplaneta americana were studied. The ...
The distribution of corazonin in the central nervous system of the heteropteran insect Triatoma infestans was studied by immunohistochemistry. The presence of corazonin isoforms was investigated using MALDI-TOF mass spectrometry in samples containing the brain, the subesophageal ganglion, the corpora cardiaca-corpus allatum complex and the anterior part of the aorta. Several groups of immunopositive perikarya were detected in the brain, the subesophageal ganglion and the thoracic ganglia. Regarding the brain, three clusters were observed in the protocerebrum. One of these clusters was formed by somata located near the entrance of the ocellar nerves whose fibers supplied the aorta and the corpora cardiaca. The remaining groups of the protocerebrum were located in the lateral soma cortex and at the boundary of the protocerebrum with the optic lobe. The optic lobe housed immunoreactive somata in the medial soma layer of the lobula and at the level of the first optic chiasma. The neuropils of the ...
From 1690 to 1905 major epidemics of yellow fever struck parts of southern and eastern America: Boston, New York, Philadelphia, New Orleans killing over 40,000 people. A 2006 PBS website gives short summaries of nine of the outbreaks and alludes to even larger mortality figures.. And then theres dengue, a disease primarily transmitted by the bite of infected female Aedes Aegypti mosquitoes. They dont make the telltale sound that alerts you to other mosquitoes, they also strike during daytime and may follow their human target, biting repeatedly.. Dengue attacks 400 million people every year world-wide., mostly in the tropics and sub-tropics. Three-fourths of those infected never develop symptoms and of the remaining 100 million, a large majority have a mild to moderate nonspecific acute illness with a fever. But 5% can have severe, even life-threatening disease with terrible joint and muscle pain (Its called break-bone fever), hemorrhages and shock. The World Health Organization estimates ...
Find and save ideas about Insuficiencia cardiaca sintomas on Pinterest. | See more ideas about Sintomas cardiacos, Insuficiencia cardiaca and Veterinario medico.
DESPOLARIZACION Y POLARIZACION CARDIACA PDF - Este umbral depende directamente del grado de polarización, la polaridad de en el momento en que no se produce un latido cardíaco, el marcapasos lo.
Are there any major differences between these two kits? Im planning to order one this weekend, and Im trying to find out what the key differences
North American monarch butterflies (Danaus plexippus) undergo a spectacular fall migration. In contrast to summer butterflies, migrants are juvenile hormone (JH) deficient, which leads to reproductive diapause and increased longevity. Migrants also utilize time-compensated sun compass orientation to help them navigate to their overwintering grounds. Here, we describe a brain expressed sequence tag (EST) resource to identify genes involved in migratory behaviors. A brain EST library was constructed from summer and migrating butterflies. Of 9,484 unique sequences, 6068 had positive hits with the non-redundant protein database; the EST database likely represents approximately 52% of the gene-encoding potential of the monarch genome. The brain transcriptome was cataloged using Gene Ontology and compared to Drosophila. Monarch genes were well represented, including those implicated in behavior. Three genes involved in increased JH activity (allatotropin, juvenile hormone acid methyltransfersase, and takeout)
TY - JOUR. T1 - A potent juvenile hormone mimic, 1-(4′-ethylphenoxy)-6,7-epoxy-3,7-dimethyl-2-octene, labeled with tritium in either the ethylphenyl- or geranyl-derived moiety. AU - Kamimura, Hideo. AU - Hammock, Bruce D.. AU - Yamamoto, Izuru. AU - Casida, John E.. PY - 1972. Y1 - 1972. N2 - Reduction of citral with sodium borotritide, conversion of the alcohol product to the bromo derivative, formation of the ether by reaction with 4-ethyl-phenol, and epoxidation yields 1-(4′-ethylphenoxy)-6,7 - epoxy - 3,7 - dimethyl - 2 - octene-1 -3H. Alternatively, tritiation of 4-ethylphenol with tritium water in sulfuric acid, reaction of the recovered phenol with geranyl bromide, and epoxidation yields 1 - (4′-ethylphen-3H-oxy)-6,7-epoxy-3,7-dimethyl-2-octene. the products have a high specific activity (33 to 654 mCi per mmol) and are useful in studies on the degradation and mode of action of this potent juvenile hormone mimic.. AB - Reduction of citral with sodium borotritide, conversion of the ...
Three billion people around the world live in tropical and subtropical regions where the four strands -or serotypes- of the denge virus (see map) exist. Each year, between 50 to 100 million people are infected through the bite of the female Aedes aegypti and other similar species, such as Aedes albopictus.. In the last decades, the rapid growth of urban populations, coupled with poor environmental sanitation services and a lack of adequate water-storage resources, has favoured the spread of mosquito vectors. At the same time, the increase in international air traffic has contributed towards the geographic dissemination of the viruses. These factors have led to a re-emergence of dengue fever, dengue hemorrhagic fever and dengue shock syndrome epidemics. Hyperendemicity (when few members of a single community are not infected) has also increased in several urban centres.. There are currently over 100 countries where dengue is endemic and the number is rising. With no available vaccine or specific ...
Principal Investigator:ISHIMURA Kazunori, Project Period (FY):1993 - 1994, Research Category:Grant-in-Aid for General Scientific Research (C), Research Field:General anatomy (including Histology/Embryology)
We observed that p-FoxO levels elevated during the previtellogenic stage but then markedly dropped in the vitellogenic phase, whereas FoxO was constantly expressed at both mRNA and protein levels. The reduction of p-FoxO abundance during vitellogenic stage suggests a link between FoxO dephosphorylation and the high level or a peak of JH titers in this duration. When JH-deprived fat bodies were further treated with methoprene, p-FoxO abundance increased at 6 h but then declined post 12 h, indicating that longer treatment of JH stimulates FoxO dephosphorylation. Intriguingly, Akt, p-Akt and p-PP2A abundance had no apparent change during the first gonadotrophic cycle. In contrast, m-PP2A abundance and PP2A activity in the fat body substantially increased on day 4 and remained high thereafter. Moreover, deprivation of endogenous JH inhibited PP2A methylation and activity, and additional application of methoprene led to obvious increase of PP2A methylation and activity. A similar pattern was seen ...
Government has delivered on its promise to provide daily hot meals for all final year Junior High School (JHS) pupils and their teachers to ensure full observation of COVID-19 safety protocols at the JHS level.
Významy v latinčine: 1. telo, teleso, hmota (napr. corpora individua - nedeliteľná hmota); 2. (ľudské alebo zvieracie) telo, (telesná) postava, v špecifickom použití mŕtve telo, mŕtvola; 3. prenesene: (usporiadané) teleso, celok, kmeň, súbor, zbor, združenie, družstvo, korporácia (napr. magnum corpus - veľké teleso, t. j. vesmír, unius populi corpus - jednotné národné teleso, národný celok, corpus omnis iuris - celok práva, súbor všetkého práva); 4. obrazne: drevo pod kôrou stromu; 5. v stredovekej latinčine: súbor diel jedného autora alebo diel venujúcich sa určitej jednej problematike (napr. Corpus Aristotelicum - súbor diel Aristotela; Corpus Reformatorum - súbor teologických diel protestantských mysliteľov, zástancov reformácie). Pozri: corpus. In Pražák, Josef M. - Novotný, František - Sedláček, Josef. Latinsko-český slovník. 1. (A - K). Praha: Státní pedagogické nakladatelství, c1955. ...
NyGuard IGR Concentrate is a juvenile hormone mimic which delivers strong IGR performance, and is especially effective against mosquitoes and other flying pests.
DISPLASIA ARRITMOGENICA DEL VENTRICULO DERECHO PDF - Displasia arritmogénica del ventrículo derecho con compromiso de ventrículo izquierdo: valor diagnóstico de la resonancia cardiaca. La displasia
Shankaracharya on the non-triviality of the entire Vedic corpus It is well known that non-Advaitins have a charge on Shankara that he gave undue importance to the Vedanta, Upanishads and trivialized the karma part or veda purva bhaaga. However one who is familiar with the Bhashya and other literature of Shankara would easily conclude that such a charge is born of lack of a proper study and correct understanding of the Bhashyas. Here are some passages from Shankara that give us a glimpse of the heart of Shankara on this matter: न हि वेदवाक्यानां कस्यचिदर्थवत्त्वम् कस्यचिदनर्थवत्त्वमिति युक्तं प्रतिपत्तुम् , प्रमाणत्वाविशेषात् । Brahmasutra Bhashyam 3.2.15 [It is not reasonable to think that some of the Vedic passages are meaningful and some are not. This is because all vedic passages are equally authoritative.] He has ...
experts believe that it could be, in part, due to the recent introduction of genetically modified (GM) foods. If evidence from around the world is anything
North American monarch butterflies (Danaus plexippus) undergo a spectacular fall migration. In contrast to summer butterflies, migrants are juvenile hormone (JH) deficient, which leads to reproductive diapause and increased longevity. Migrants also utilize time-compensated sun compass orientation to help them navigate to their overwintering grounds. Here, we describe a brain expressed sequence tag (EST) resource to identify genes involved in migratory behaviors. A brain EST library was constructed from summer and migrating butterflies. Of 9,484 unique sequences, 6068 had positive hits with the non-redundant protein database; the EST database likely represents ∼52% of the gene-encoding potential of the monarch genome. The brain transcriptome was cataloged using Gene Ontology and compared to Drosophila. Monarch genes were well represented, including those implicated in behavior. Three genes involved in increased JH activity (allatotropin, juvenile hormone acid methyltransfersase, and takeout) were
Zika is primarily spread by the female Aedes aegypti mosquito, which is active mostly in the daytime.[44][45] The mosquitos must feed on blood to lay eggs.[46]:2 The virus has also been isolated from a number of arboreal mosquito species in the genus Aedes, such as A. africanus, A. apicoargenteus, A. furcifer, A. hensilli, A. luteocephalus, and A. vittatus, with an extrinsic incubation period in mosquitoes around 10 days.[21]. The true extent of the vectors is still unknown. Zika has been detected in many more species of Aedes, along with Anopheles coustani, Mansonia uniformis, and Culex perfuscus, although this alone does not incriminate them as vectors.[45] To detect the presence of the virus usually requires genetic material to be analysed in a lab using the technique RT-PCR. A much cheaper and faster method involves shining a light at the head and thorax of the mosquito, and detecting chemical compounds characteristic of the virus using near-infrared spectroscopy.[47]. Transmission by A. ...
Come March next year, the Government will begin releasing half a million sterile male mosquitoes into the environment per week to help slash the population of the female Aedes aegypti, which is responsible for spreading the deadly dengue virus....
Think of your pituitary gland and all the amazing things its done for you (and for that guy from The Relic). Crabs have something similar: the X-organ sinus gland (XO-SG; see fancy drawing). Just as the pituitary gland controls the function of other endocrine glands, the XO-SG controls (by inhibiting) the function of the mandibular organs (MO) and Y-organs in crabs. And just as the pituitary gland produces follicle-stimulating hormone (FSH) to stimulate the ovaries and testes of humans, the MO produces methyl farnesoate (MF) to stimulate gonad development in crabs! ...
The morphological difference between male and female stag beetles is widely known. Male stag beetles have a pair of fully developed mandibles that are commonly called hasami, while females do not exhibit such mandible growth. What is the mechanism that causes such significant difference within the same species? In order to understand this mechanism, a developmental study was carried out on Cyclommatus metallifer, focusing on sex-determination genes and juvenile hormone*2 signaling pathways.. Results indicate that the dsx gene, a sex-determining gene for insects, regulates sexual dimorphism in stag beetles. It is also suggested that a large difference in sexual dimorphism of mandible growth is due to the dsx gene that regulates juvenile hormone responsiveness in different directions depending on whether the individual is male or female. These results are a major milestone, and mark the discovery of the sexual differentiation regulatory mechanism by the dsx gene via hormone responsiveness, ...
TY - JOUR. T1 - Mejorar la calidad de la asistencia cardiaca. T2 - un imperativo mundial. AU - Smith, Sidney C.. AU - Fonarow, Gregg C.. AU - Piña, Ileana L.. AU - Suter, Robert. AU - Morgan, Louise. AU - Taubert, Kathryn. AU - Sánchez, Eduardo. AU - Antman, Elliott. PY - 2015/11/1. Y1 - 2015/11/1. UR - http://www.scopus.com/inward/record.url?scp=84947863641&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=84947863641&partnerID=8YFLogxK. U2 - 10.1016/j.recesp.2015.07.006. DO - 10.1016/j.recesp.2015.07.006. M3 - Article. C2 - 26363722. VL - 68. SP - 924. EP - 927. JO - Revista Espanola de Cardiologia. JF - Revista Espanola de Cardiologia. SN - 0300-8932. IS - 11. ER - ...
Department of Biology, Faculty of Science, Kanazawa University, Kanazawa, Japan Awarded the degree of M.Sc. in biology for a thesis entitled Identification of the juvenile hormone from the silkworm, Bombyx mori. Work supervised by Professor T. Ohtaki, Ph.D. and Associate Professor S. Sakurai, Ph. ...
36 products from 11 suppliers. Compare and order HMGCR ELISA Kits. View citations, images, detection ranges, sensitivity, prices and more. Recommended products for the most popular species. Our scientists will help you find the right ELISA kit for your needs.
At JH Genetics, we established goals for our cattle operation many years ago and hard work and determination have enabled us to produce a product that we are proud to put our brand on. We ask that everyone sit up and take notice of the Brahman cattle wearing the JH brand because the quality truly speaks for itself and we are here to stay ...
At JH Genetics, we established goals for our cattle operation many years ago and hard work and determination have enabled us to produce a product that we are proud to put our brand on. We ask that everyone sit up and take notice of the Brahman cattle wearing the JH brand because the quality truly speaks for itself and we are here to stay ...
Juvenile hormone is synthesised in the corpora allata. In every insect tested, at least one of the three types of Allatostatin ... This is achieved by paracrine release of Allatostatin from neurons in the brain which terminate in the corpora allata. The ...
A larger corpora allata also influences the determination of dominance. A higher reproductive capacity is indicative of the ...
The corpora allata is responsible for the production of juvenile hormone (JH). In the bean bug, Riptortus pedestris, clusters ... The neuroendocrine system of insects consists primarily of neurosecretory cells in the brain, the corpora cardiaca, corpora ... on the protocerebrum called the pars lateralis maintain reproductive diapause by inhibiting JH production by the corpora allata ... allata and the prothoracic glands. There are several key hormones involved in the regulation of diapause: juvenile hormone (JH ...
In insects, Allatostatin controls growth through paracrine action on the corpora allata.[citation needed] In mature organisms, ...
doi:10.1016/0022-1910(90)90066-o. Rachinsky A (1994). "Octopamine and serotonin influence on corpora allata activity in honey ... release in the corpora allata of honey bee (Apis mellifera), but Woodring and Hoffmann found that synephrine had no effect on ...
Oöcyte growth in the brown-banded cockroach correlated with corpora allata activity in vitro. Ovariectomies were conducted: ... calling behaviour and release is regulated directly and indirectly by the corpora allata and juvenile hormone. Smith and Schal ... both pheromone production and calling could be restored by a corpora allata implantation or treatment with juvenile hormones; ... "Corpus Allatum Control of Sex Pheromone Production and Calling in the Female Brown-banded Cockroach, Supella longipalpa (F.) ( ...
Isomerization of isopentenyl pyrophosphate and homoisopentenyl pyrophosphate by Manduca sexta corpora cardiaca - corpora allata ... the removal of the corpora allata from juveniles will result in a diminutive adult at the next moult. Implantation of corpora ... When the corpora allata of the third instar insect were removed, the level of JH was equal in both insects to that in the ... When the fourth instar Rhodnius had its corpora allata removed, both contained a third instar level of JH and hence one ...
While the corpora cardiaca produce PTTH, the corpora allata also produces juvenile hormones, and the prothorocic glands produce ... This hormone is produced by corpora allata and corpora cardiaca, where it is also stored. Some glands are specialized to ...
In this species, pheromones suppress activity of the corpora allata and juvenile hormone (JH) secretion. The corpora allata is ... "A rapid partition assay for routine analysis of juvenile hormone released by insect corpora allata". Analytical Biochemistry. ...
Caracterização das mudas ontogenéticas e biometria dos corpora allata de Melipona quadrifasciata anthidioides Lep. (Hymenoptera ...
While the corpora cardiaca produce PTTH, the corpora allata also produces juvanile hormones, and the prothorocic glands produce ... This hormone is produced by corpora allata and corpora cardiaca, where it is also stored. Some glands are specialized to ... These glands are part of the endocrine system: 1. Neurosecretory cells 2. Corpora cardiaca 3. Prothoracic glands 4. Corpora ... Strong neuron connections connect the neurohemal corpora cardiaca to the brain and frontal ganglion, where the closely related ...
They are also consistent with a model advanced by others that corpora allata maintained in vitro of day 0 M. sexta larva ... Juvenile hormone production, juvenile hormone esterase, and juvenile hormone acid methyltransferase in corpora allata of ...
When the corpora allata is removed in females, the ovaries are underdeveloped, whereas in insects with intact corpora allata, ... The corpora allata is an endocrine gland that when removed, causes pheromone synthesis and calling behavior to cease. The ... The juvenile hormone, released by the corpora allota, is necessary for females to produce and release pheromones through their ...
Among queenless B. terrestris workers, the corpora allata, which secrete JH, was noticeably enlarged compared to queenright ...
Corpora allata are small, paired glandular bodies originating from the epithelium located on either side of the foregut. They ... Corpora cardiaca are a pair of neuroglandular bodies that are found behind the brain and on either sides of the aorta. These ...
Further it was demonstrated that the corpora allata secrete the juvenile hormone which prevents the premature development into ...
Corpus allata activity is also affected by external factors, as it tends to be greater when mating and egg-laying are occurring ... It is possible that the production by the corpus allata may be affected by nervous stimulation or inhibition of the glands. The ... which is produced in the corpus allata. The production of this juvenile hormone fluctuates. Patterns of behavior are correlated ...
PTTH also stimulates the corpora allata, a retrocerebral organ, to produce juvenile hormone, which prevents the development of ...
... and corpora allata surgically removed. Eclosion rhythms were only abolished with the removal of the brain, indicating that the ... Truman demonstrated that eclosion rhythms persist in Hyalophora cecropia moths that have had their compound eyes, corpora ...
Axons from neurosecretory cells trace to corpora cardiaca and corpora allata and produce and secrete a brain hormone which ... Neurosecretory cells, found in clusters in the medial and lateral parts of the brain, control corpora allata activity by ...
Further evidence shows that foundresses that have a larger corpora allata, a region of the female wasp brain responsible for ...
These food sources promote maturation by producing hormones from the corpora allata (CA) and medial neurosecretory cell ... aegypti, and ovary derivation from a blood-fed mosquito caused corpus cardiacum stimulating factor production, indicating that ... has been shown to cause release of corpus cardiacum (CC) stimulating factor in the ovaries, which spurs research of egg ...
... released by the corpora allata (CA), is necessary for the production and release of the sex pheromone. The CA releases JH which ...
A. Rachinsky (1994). "Octopamine and serotonin influence on corpora allata activity in honey bee (Apis mellifera) larvae." J. ... release in the corpora allata of honey bee (Apis mellifera),[101] but Woodring and Hoffmann found that synephrine had no effect ...
In insect physiology and anatomy, the corpus allatum (plural: corpora allata) is an endocrine gland which generates juvenile ... Similarly, transplantation of corpora allata from a young larva to a fully mature larva can greatly extend the larval stage, ... Surgical removal of the corpora allata (an allatectomy) can cause an immature larva to pupate at its next molt, resulting in a ... In many Diptera species, the corpus allatum is fused with the corpus cardiacum, forming a "ring gland", also known as ...
I sovrani di Torres, a cura di A. Orunesu e V. Pusceddu, Quartu S. Elena, 1993 Theodor Mommsen, CIL, Corpus Inscriptionum ... ALLATA ESSET SE EAM QVAE IN PROVINCIA ESSET SECVTVRVM EGO QVOQVE ADITVS A GALILLENSIBVS EXCVSANTIBVS QVOD NONDVM FORMA ALLATA ... Theodor Mommsen, CIL, Corpus Inscriptionum Latinarum, Inscriptiones Sardiniae, G. Reimerum, Berlin, 1883, 7th paragraph, pag. ... Corpus Inscriptionum Latinarum, Inscriptiones Sardiniae, G. Reimerum, Berlin, 1883, 4th paragraph, pag.789. - Greek text: Εἰς ...
123C in Corpus Christianorum, Series Latina. Bachenheimer, Bonnie S. (2010). Manual for Pharmacy Technicians. ISBN 978-1-58528- ... die Maij sequentia in consilio noua ex Bohemia allata....". Page 71: "XIX. Maij". Wilhelm Ernst Tentzel (1699): Als Ihre Königl ...
Further evidence shows that foundresses that have a larger corpora allata, a region of the female wasp brain responsible for ...
Manduca sexta allatotropin and the in vitro biosynthesis of juvenile hormone by moth corpora allata: a comparison of ... biosynthesis by the corpora allata (CA) of different-aged virgin females from migrant (Quebec) and non-migrant (Azores) ...
... produced by the corpora allata (CA), which induces the synthesis of vitellogenin (Vg) in the fat body, which is then ... Interactions Between Corpora Allata, Fat Body and Ovary in Insect Reproduction: Which Controls Which? ... Interactions Between Corpora Allata, Fat Body and Ovary in Insect Reproduction: Which Controls Which? ... Home , Journals , Netherlands Journal of Zoology , Interactions Between Corpora Allata, Fat Body and... ...
Elucidation of energy homeostasis of corpora cardiaca and corpora allata in insect. Research Project ... RNA sequencing of a specila central nervous system tissue--Corpora cardiaca (CC), which will be proved as a sensory organ ...
... of the corpora allata make it possible to advance the opinion that in both Anopheles and in the Chaoborus the corpora allata ... On the basis of the histological changes observed in the large larval cells of the corpora cardiaca in the diapausing larvae of ... The large larval cells of the corpora cardiaca differ sharply in terms of their structure in the two genera, Anopheles and ... of a hormone of the large larval cells of the corpora cardiaca and that consequently the large larval cells of the corpora ...
Identification of a P450 Expressed in the Corpora Allata.. Cyp6g2 is the only P450 detected in the corpora allata of embryos ... 3B). Cyp6g2 is the only P450 detected in the corpora allata (Fig. 3C). Cyp6d2 (Fig. 3D), and Cyp4e3 are expressed in the ... Cyp15a1 from the cockroach D. punctata is expressed selectively in the corpora allata, and encodes a P450 enzyme that catalyses ... Other P450s were identified to have specific expression patterns (e.g., corpora allata, brain, salivary glands, hindgut, and ...
On the other hand, a hormone secreted by the corpora allata inhibits metamorphosis… ... are chiefly secreted by the corpora allata and other parts of the brain and by paired prothoracic glands. The prothoracic gland ... Other articles where Corpus allatum is discussed: lepidopteran: Growth, molting, and metamorphosis: … ... the paired corpora allata (singular, corpus allatum) are both neurohemal organs that store brain neurohormones, but each has ...
Corpora Cardiaca --. 2.3. Corpora Allata --. 3 Diapause --. 3.1. Imaginal Diapause --. 3.2. Pupal Diapause --. 3.3. Larval ... Corpora Cardiaca -- 2.3. Corpora Allata -- 3 Diapause -- 3.1. Imaginal Diapause -- 3.2. Pupal Diapause -- 3.3. Larval Diapause ... Ecdysone and Corpora Allata Activity --. A.2.8. Juvenile Hormone Esterase Regulation --. A.3. Diapause --. A.3.1. Pupal ... Ecdysone and Corpora Allata Activity -- A.2.8. Juvenile Hormone Esterase Regulation -- A.3. Diapause -- A.3.1. Pupal Diapause ...
Males with corpora allata in similar conditions were injected with saline as controls. In males with denervated corpora allata ... In 10 of 50 males with denervated corpora allata in which one or no ovarioles grew, juvenile hormone production was not higher ... This suggests that intact nerves from the brain to the corpora allata restrained juvenile hormone production so that ovarioles ... Juvenile hormone synthesis by denervated corpora allata in males with ovariole implants was greater than in controls. ...
Juvenile hormone is synthesised in the corpora allata. In every insect tested, at least one of the three types of Allatostatin ... This is achieved by paracrine release of Allatostatin from neurons in the brain which terminate in the corpora allata. The ...
Isomerization of isopentenyl pyrophosphate and homoisopentenyl pyrophosphate by Manduca sexta corpora cardiaca - corpora allata ... the removal of the corpora allata from juveniles will result in a diminutive adult at the next moult. Implantation of corpora ... When the corpora allata of the third instar insect were removed, the level of JH was equal in both insects to that in the ... When the fourth instar Rhodnius had its corpora allata removed, both contained a third instar level of JH and hence one ...
A larger corpora allata also influences the determination of dominance. A higher reproductive capacity is indicative of the ...
Corpora allata. A pair of small endocrine glands located just behind the brain.. Cosmopolitan. Occurring throughout most of the ...
The corpora allata of mosquitoes. Conn. Agric. Exp. Stn. Bull. 488:396-405. ... The comparative submicroscopic cytology of the corpus allatum-corpus cardiacum complex of wild type and fes adult female ... The effect of the corpus allatum and synthetic juvenile hormone on the tissue of the adult male. Gen. Comp. Endocrinol. 13:68- ... By surgically joining a late larva, which was ready to undergo the pupal molt, with a younger larva containing a corpus allatum ...
... corpora allata; SOG, suboesophageal ganglion. (Bi, Bii) Schematic drawing of the FG, the nerves leaving it and the muscles they ... A) A sectional diagram of the locust head showing the relative position of the frontal ganglion (FG). CC, corpora cardiaca; HG ... 1B), which is closely associated with the corpora cardiaca. These and other three pairs of efferent nerves (the anterior, ...
... corpora cardiaca; CA, corpora allata; PSO, perisympathetic organ; T1-3, first-third thoracic ganglia; A1-8, first-eight ...
Regulation of the Corpora Allata in Adult Female Insects. Growth in Insects. Eclosion Hormone: Its Role in Coordinating ...
Juvenile hormone is secreted by the corpora allata. The secretory cells of the corpora allata are active during larval molts ... In the last larval instar, however, the medial nerve from the brain to the corpora allata inhibits the gland from producing JH ...
SLOW AND FAST REGULATION OF CORPORA ALLATA IN A HETEROPTERAN INSECT (Abstract Only) (1-Mar-00) ...
5· The Yolk-Formation Hormone (Metabolic Hormone) of the Corpora Allata. 6. Pheromones. References. Part C Antibiotics. Chapter ... Other topics include the yolk-formation hormone of the corpora allata, biochemical aspect of the antibiotics, and miscellaneous ...
Technical Abstract: Activity of corpora allata (CA) of the fire bug, Pyrrhocoris apterus (Heteroptera), was determined in vitro ... Title: SLOW AND FAST REGULATION OF CORPORA ALLATA IN A HETEROPTERAN INSECT ...
O complexo retrocerebral é composto por duas glândulas pares: corpora cardiaca e corpora allata. A localização espacial destas ... The retrocerebral complex is composed by two pairs of glands: corpora cardiaca and corpora allata. In this work, tridimensional ... In this structure two neuropilar groups are present: corpora pedunculata, the bilateral mushroom bodies that occupy a large ... Nele encontram-se dois conjuntos neuropilares: os corpora pedunculata, de forma cogumelar, que ocupam grande parte do ...
These other organs include the corpora cardiaca, the prothoracic glands, and the corpora allata. The corpora cardiaca are ... The corpora allata is located near the digestive system and secretes juvenile hormone. Juvenile hormone is involved in growth, ... The pineal is located deep in the brain just below the rear-most portion of the corpus callosum (a thick stretch of nerves that ... The pineal is located deep in the brain just below the rear-most portion of the corpus callosum (a thick stretch of nerves that ...
... pheromones suppress activity of the corpora allata and juvenile hormone (JH) secretion. The corpora allata is an endocrine ... "A rapid partition assay for routine analysis of juvenile hormone released by insect corpora allata". Analytical Biochemistry. ...
Brains (with attached corpora allata-corpora cardiaca complexes) were dissected on dry ice and stored at −80 °C. ... 2003) Peptidomics of the locust corpora allata: Identification of novel pyrokinins (-FXPRLamides) Peptides 24:1493-1500. ...
1998 Peptidergic control of the corpus cardiacum-corpora allata complex of locusts. Int. Rev. Cytol. 182: 249-302. ... consisting of the corpus allatum (CA), prothoracic gland, and corpora cardiaca (CC; Bodenstein 1950). Previously, the dAkh gene ... Corpora cardiaca (CC)-specific expression of dAkh gene products. (A and B) In situ localizations of dAkh mRNA. The dAkh gene is ... Corpora cardiaca-specific expression of the dAkh gene: The larval ring gland is an important endocrine organ in the ...
Gotoh, H., Cornette, R., Koshikawa, S., and Miura, T. (2008). Effects of precocenes on the corpora allata and JH titer in the ... Early studies demonstrated that the transplantation of corpora allata (CA; juvenile hormone-producing endocrine glands) induced ...
aegypti corpora allata (CA) was studied in vitro using a radiochemical method. JH synthesis was significantly reduced in ... Li, Y., Hernández-Martínez, S., Unnithan, G. C., Feyereisen, R. and Noriega, F. G. (2003a). Activity of the corpora allata of ... JH is synthesized and released from the corpora allata (CA), a pair of endocrine glands with nervous connections to the brain ( ... Lea, A. O. (1963). Some relationships between environment, corpora allata, and egg maturation in Aedine mosquitoes. J. Insect ...
Corpora allata activity: Corpora Allata (CA) volume was used as an indicator of the Juvenile Hormone (JH) level (Pflugefelder, ... Corpora allata activity: Results reported in Fig. 3 depict that treatment of S. littoralis 4th larval instar with both ... Also, the Corpora Allata (CA) activity has been observed in S. littoralis treated larvae. Both lufenuron and chlorfluazuron ... Efficacy of lufenuron and chlorfluazuron on the corpora allata activity of S. littoralis 4th instar larvae. Error bars ...
NADP+-dependent farnesol dehydrogenase, a corpora allata enzyme involved in juvenile hormone synthesis. Proceedings of the ...
The paired corpora cardiaca (singular, corpus cardiacum) and the paired corpora allata (singular, corpus allatum) are both ... This neurohormone is stored in either the corpora cardiaca or the corpora allata, depending on the species. Uptake of ... Each molt is aided by a small amount of juvenile hormone (JH) secreted by endocrine cells of the corpora allata. Without JH ... In the live-bearing tsetse fly, Glossina, a neurohormone released from the corpora allata stimulates milk glands that provide ...
  • Interactions Between Corpora Allata, Fat Body and Ovary in Insect Reproduction: Which Controls Which? (brillonline.com)
  • When the corpora allata of the third instar insect were removed, the level of JH was equal in both insects to that in the fourth instar animal, and hence both proceeded to the fifth instar at the next moult. (wikipedia.org)
  • The allatostatin family of insect neuropeptides inhibit the in vitro biosynthesis of juvenile hormone (JH) by the corpora allata of the cockroaches Diploptera punctata Blattella germanica (L) and Periplaneta americana (Belles et al. (freepatentsonline.com)
  • The insect allatostatins obtained their names because they block the biosynthesis of juvenile hormone (a terpenoid) in the corpora allata (two endocrine organs near the insect brain). (sigmaaldrich.com)
  • There are two principal categories of hormones released from the central neuroendocrine system (neurosecretory cells of the brain, corpora cardiaca, corpora allata) that regulate insect growth and metamorphosis. (brillonline.com)
  • The first is a complex set of neurohormones (neuropeptides) originating in the neurosecretory cells of the insect brain, which are released from the neurohaemal organs, the corpora cardiaca. (brillonline.com)
  • Arthropod-specific juvenile hormone (JH), a sesquiterpenoid produced in corpora allata, governs insect metamorphosis and reproduction. (biologists.org)
  • The most striking fact revealed by investigations of insect neurohormones is that insects are as well supplied with neurohormones as mammals, since neurohor- mones regulate not only the functioning of the endocrine glands, prothoracic gland, and corpora allata, but also most physiological processes. (waterstones.com)
  • Pannabecker, T & Orchard, I 1988, ' Receptors for octopamine in the storage lobe of the locust (Locusta migratoria) corpus cardiacum: Evidence from studies on cyclic nucleotides ', Journal of Insect Physiology , vol. 34, no. 8, pp. 815-820. (elsevier.com)
  • Wigglesworth also showed that corpora allata located near the insect brain, produce a hormone that retards metamorphosis by producing j uvenile hormone . (iaszoology.com)
  • Also, the Corpora Allata (CA) activity has been observed in S. littoralis treated larvae. (scialert.net)
  • Each corpus cardiacum however, is a loose body of cells attached to the wall of the aorta (heart) (Figure 1). (beeculture.com)
  • Peptidergic innervation of the corpus cardiacum/corpus allatum (CC/CA) retrocerebral complex, and neurosecretory areas of the brain of the lepidopterans Lacanobia oleracea, Heliothis virescens and Manduca sexta was studied by immunocytochemistry linked to confocal laser scanning microscopy. (eurekamag.com)
  • Em P. megistus o corpus cardiacum e a aorta têm uma estrutura semelhante. (bvsalud.org)
  • The storage lobe of the locust corpus cardiacum consists primarily of neurosecretory cell axons and terminals and serves as a neurohaemal organ for the release of several neuropeptides. (elsevier.com)
  • Biogenic amines have previously been identified in the storage lobe of the adult corpus cardiacum, and interest in the functional roles of these amines has arisen due to their modulatory actions on numerous physiological processes in insects. (elsevier.com)
  • It has been suggested that these compounds may be released from the storage lobe as neurohormones, however an alternative possibility is that they serve as neurotransmitters or neuromodulators which act at sites within the corpus cardiacum proper. (elsevier.com)
  • These results suggest that octopamine may be involved in regulating some aspect of neurosecretion in the storage lobe of the locust corpus cardiacum. (elsevier.com)
  • The endocrine glands corpora allata and the glands were investigated in three mosquito species from the family Culicidae the bloodsucking malaria mosquitos Anopheles maculipennis and A. bifurcatus and the non-bloodsucking mosquito Chaoborus crystallinus. (dtic.mil)
  • are chiefly secreted by the corpora allata and other parts of the brain and by paired prothoracic glands. (britannica.com)
  • hormone is released by the corpora allata, another pair of non-neural endocrine glands, located behind the corpora cardiaca. (britannica.com)
  • Juvenile hormones are secreted by a pair of endocrine glands behind the brain called the corpora allata. (wikipedia.org)
  • The primary control of juvenile hormone is by 1) the stimulation of the corpora allata by allatotropins short peptides which bind to G-protein coupled receptors, which signal the glands to produce JH, and 2), the inhibition of JH production by allatostatins. (wikipedia.org)
  • JH is synthesized and released from the corpora allata (CA), a pair of endocrine glands with nervous connections to the brain ( Stay, 2000 ). (biologists.org)
  • juvenile hormone A hormone secreted by insects from a pair of endocrine glands ( corpora allata ) close to the brain. (encyclopedia.com)
  • The second category of centrally produced hormones in insects is the morphogenesis inhibiting hormone, or juvenile hormone (JH), produced by the associated endocrine glands, the corpora allata. (brillonline.com)
  • The other two endocrine glands are the corpora cardiaca and corpora allata that are connected by nerve fibers to each other and to brain neuro-secretory cells. (beeculture.com)
  • The corpora allata glands are two globular organs found on the sides of the esophagus, behind the brain in both larvae and adults. (beeculture.com)
  • In the small space behind the brain and in front of the connection to the neck are the main neurosecretory glands: corpora allata and corpora cardiaca. (beeculture.com)
  • The brain (yes, insects have brains) secretes a hormone called PTTH via a pair of glands called the corpora cardiaca. (duke.edu)
  • These neurons respond by secreting brain hormone which stimulates corpora cardiaca to release the prothoracicotropic hormone (PTTH) into circulatory system, which then stimulates the prothoracic glands to secrete the molting hormone, ecdysone . (iaszoology.com)
  • It was subsequently shown that the active molecules precocenes destroyed the glands corpora allata, which produce JH . (iaszoology.com)
  • the paired corpora allata (singular, corpus allatum) are both neurohemal organs that store brain neurohormones, but each has some endocrine cells as well. (britannica.com)
  • behind the brain, called the corpus allatum, secretes juvenile hormone (also known as neotenin). (britannica.com)
  • Instead, stimulation by the corpus allatum, an organ in insects that corresponds in function to the pituitary gland, causes the secretion of liquid substances on the body surface. (britannica.com)
  • 1969. Control of the medial neurosecretory cells by the corpus allatum in Calliphora erythrocephala. (ufl.edu)
  • 1969. Size independent secretion by the corpus allatum of Calliphora erythrocephala. (ufl.edu)
  • O corpus allatum mostra células de formas diferentes. (bvsalud.org)
  • Infection of regulatory tissues and organs such as the ganglia of the central nervous system, neurosecretory cells, and the corpora allata may also have detrimental effects on the overall functioning of a mosquito, even in the absence of widespread infection. (ajtmh.org)
  • We compared the effects of Manduca sexta allatotropin (Manse-AT) on the rate of in vitro juvenile hormone (JH) biosynthesis by the corpora allata (CA) of different-aged virgin females from migrant (Quebec) and non-migrant (Azores) populations of the armyworm, Pseudaletia unipuncta, as well as fromearly- and late-calling lines selected fromthe Quebec population. (gc.ca)
  • The enzyme was described from the corpora allata of Drosophila melanogaster (fruit fly), Manduca sexta (tobacco hornworm) and Aedes aegypti (dengue mosquito). (kegg.jp)
  • Farnesol and farnesal dehydrogenase(s) in corpora allata of the tobacco hornworm moth, Manduca sexta. (kegg.jp)
  • The patterns of immunostaining resulting from the simultaneous application of fluorochrome-conjugated antibodies against Manduca sexta allatostatin (Mas-AS), M. sexta allatotropin (Mas-AT), and a representative of the -Y/FXFGL-NH(2) superfamily of allatostatins was correlated with the physiological effects of these putative allatoregulatory peptides on juvenile hormone (JH) biosynthesis by the corpora allata. (eurekamag.com)
  • Since the corpora allata are important in moult and metamorphosis regulation, we have studied morphological changes in 4th instar nymphs (gland size, cell density, percent of animals showing mitoses and cell size). (bvsalud.org)
  • Generally, the removal of the corpora allata from juveniles will result in a diminutive adult at the next moult. (wikipedia.org)
  • The dAkh gene is expressed exclusively in the corpora cardiaca from late embryos to adult stages. (genetics.org)
  • Cholinergic regulation of the corpora allata in adult male loreyi leafworm Mythimna loreyi. (nus.edu.sg)
  • In the female adult, ETH was confirmed in the lnka cells at the tracheae by immunostaining and also in vitro exposure to ETH stimulated the isolated corpora allata of adult in activity. (ugent.be)
  • Juvenile hormone (JH) has been demonstrated to control adult lifespan in a number of non-model insects where surgical removal of the corpora allata eliminates the hormone's source. (beds.ac.uk)
  • Here we adapt a genetic approach to knock out the corpora allata in adult Drosophila melanogaster and characterize adult life history phenotypes produced by reduction of juvenile hormone. (beds.ac.uk)
  • A tissue specific driver inducing an inhibitor of a protein phosphatase was used to ablate the corpora allata while permitting normal development of adult flies. (beds.ac.uk)
  • Corpora allata knockout adults had greatly reduced fecundity, inhibited oogenesis, impaired adult fat body development and extended lifespan. (beds.ac.uk)
  • The expression of these eight genes was analyzed in corpora allata (CA) and ovaries of adult female D. punctata . (biomedcentral.com)
  • Previously, we showed that synchronous autophagy occurred in the corpora allata during the declining phase of juvenile hormone synthesis in mated adult females of the. (naver.com)
  • Two myotropic peptides termed locustatachykinin I (Gly-Pro-Ser-Gly-Phe-Tyr-Gly-Val-Arg-NH2) and locustatachykinin II (Ala-Pro-Leu-Ser-Gly-Phe-Tyr-Gly-Val-Arg-NH2) were isolated from brain-corpora cardiaca-corpora allata-suboesophageal ganglion extracts of the locust, Locusta migratoria. (nih.gov)
  • The large larval cells of the corpora cardiaca differ sharply in terms of their structure in the two genera, Anopheles and Chaoborus, both in dimension and also for a number of other features. (dtic.mil)
  • Implantation of corpora allata into last larval instars will boost JH levels and hence produce a supernumary (extra) juvenile instar etc. (wikipedia.org)
  • During larval life, another hormone, called the juvenile hormone, is secreted by the corpora allata. (duke.edu)
  • The secretory cells of corpora allata are active during larval molts but are inactive during the metamorphic molt. (iaszoology.com)
  • In the cockroach Diploptera punctata, vitellogenic basal oocytes stimulate juvenile hormone production by the corpora allata. (journaldatabase.info)
  • Allatostatins (ASTs) are neuropeptides that inhibit the biosynthesis and release of juvenile hormone from the corpora allata (CA) of various insects including the cockroach Diploptera punctata. (queensu.ca)
  • Formation of a whorl-like autophagosome by Golgi apparatus engulfing a ribosome-containing vacuole in corpora allata of the cockroach Diploptera punctata. (naver.com)
  • The classical model describing the endocrinology of vitellogenesis involves the juvenile hormone (JH) produced by the corpora allata (CA), which induces the synthesis of vitellogenin (Vg) in the fat body, which is then incorporated into developing oocytes. (brillonline.com)
  • Two ovarioles with vitellogenic basal oocytes were implanted into unoperated and sham-operated males that do not produce vitellogenin, and males with denervated corpora allata, that produce more juvenile hormone, and sometimes more vitellogenin. (journaldatabase.info)
  • Juvenile hormone synthesis by denervated corpora allata in males with ovariole implants was greater than in controls. (journaldatabase.info)
  • In 10 of 50 males with denervated corpora allata in which one or no ovarioles grew, juvenile hormone production was not higher than in controls. (journaldatabase.info)
  • This suggests that intact nerves from the brain to the corpora allata restrained juvenile hormone production so that ovarioles could elicit only slight stimulation of the corpora allata, and oocytes continued vitellogenesis but more slowly than in denervated males. (journaldatabase.info)
  • Juvenile hormone is synthesised in the corpora allata. (wikipedia.org)
  • juvenile hormone ( neotenin ) A hormone , released by the corpora allata , which regulates the form of larvae after each moult. (encyclopedia.com)
  • Allatoregulatory peptides either inhibit (allatostatins) or stimulate (allatotropins) juvenile hormone (JH) synthesis by the corpora allata (CA) of insects. (sigmaaldrich.com)
  • Implantation of a pair of corpora allata or injection of juvenile hormone III into decapitated crickets caused muscle degeneration. (biomedsearch.com)
  • Following dsRNA injection, the juvenile hormone (JH) titers in the corpora allata were clearly raised suggest that the putative inhibition of receptor RNA expression may increase JH production. (queensu.ca)
  • The function of the corpora cardiaca is not completely clear but the corpora allata produces a substance called juvenile hormone (JH). (beeculture.com)
  • Molting is initiated when brain hormone is passed down the nervous connections to the corpus cardiaca, where it is released into the hemolymph (blood) of the bee. (beeculture.com)
  • Our results show that corpora allata cells differ in their ultrastructural characteristics and that thecessation of juvenile hormone production by these cells in M. quadrifasciata is not synchronous. (bvsalud.org)
  • The vitellogenin inhibition is induced by the stopping of juvenile hormone JH III by the corpora allata. (bvsalud.org)
  • The putative allatostatin-like receptor sequence encoding 425 amino acid residues was isolated from a cDNA library prepared from corpora allata of D. punctata. (queensu.ca)
  • The data from a comparative histological study of the corpora allata make it possible to advance the opinion that in both Anopheles and in the Chaoborus the corpora allata stimulate the maturation of the ovaries. (dtic.mil)
  • 1969. Egg maturation in mosquitoes not regulated by the corpora allata. (ufl.edu)
  • Experiments conducted in Mythimna unipuncta (true armyworm moth) and Agrotis ipsilon (black cutworm moth) have shown that removing the corpus allata, which secretes JH, stops all release of sex pheromone. (wikipedia.org)
  • We identified numerous P450s expressed in the fat body, Malpighian (renal) tubules, and in distinct regions of the midgut, consistent with hypothesized roles in detoxification processes, and other P450s expressed in organs such as the gonads, corpora allata, oenocytes, hindgut, and brain. (pnas.org)
  • The brain regulates corpora allata activity via neural and neuroendocrine signals. (beeculture.com)
  • RNA sequencing of a specila central nervous system tissue--Corpora cardiaca (CC), which will be proved as a sensory organ between brain and peripheral nervous system. (nii.ac.jp)
  • This is achieved by paracrine release of Allatostatin from neurons in the brain which terminate in the corpora allata. (wikipedia.org)
  • In mated females, Dippu-AstR mRNA is expressed at the highest levels on day 6 post-emergence in brain and corpora allata and day 2 post-emergence in midgut. (queensu.ca)
  • Activity of corpora allata (CA) of the fire bug, Pyrrhocoris apterus (Heteroptera), was determined in vitro by measurement of the radioactive nonpolar compounds released into incubation medium containing 3H-methionine. (usda.gov)
  • corpora allata (CA) was studied in vitro using a radiochemical method. (biologists.org)
  • Aldehyde dehydrogenase 3 converts farnesal into farnesoic acid in the corpora allata of mosquitoes. (kegg.jp)
  • When the fourth instar Rhodnius had its corpora allata removed, both contained a third instar level of JH and hence one proceeded to instar four, and the other remained at this instar. (wikipedia.org)
  • In this work, we examined theultrastructure of corpora allata cells from stingless bees (Melipona quadrifasciata) treated with juvenilehormone during development. (bvsalud.org)
  • The corpora allata cells of M. quadrifasciata queens showed greater activitythan those of workers. (bvsalud.org)
  • Efficacy of these IGR compounds on the total hemocyte count, different hemocyte count and corpora allata activity were also carried out. (scialert.net)
  • In males with denervated corpora allata compared to sham-operated and unoperated males, the implanted basal oocytes showed a greater increase in length, protein, and vitellin content. (journaldatabase.info)
  • The ability of precocene II to induce abnormal moulting disappeared during stage 2 correlating with the termination of the head critical period and suggesting that corpora allata are essential during days 3 to 5 to determine normal growth. (bvsalud.org)