Corpora Allata: 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.Juvenile Hormones: Compounds, either natural or synthetic, which block development of the growing insect.Vitellins: 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).Cockroaches: Insects of the order Dictyoptera comprising several families including Blaberidae, BLATTELLIDAE, Blattidae (containing the American cockroach PERIPLANETA americana), Cryptocercidae, and Polyphagidae.Farnesol: 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)Lepidoptera: A large order of insects comprising the butterflies and moths.Insect Hormones: Hormones secreted by insects. They influence their growth and development. Also synthetic substances that act like insect hormones.Corpus Luteum: The yellow body derived from the ruptured OVARIAN FOLLICLE after OVULATION. The process of corpus luteum formation, LUTEINIZATION, is regulated by LUTEINIZING HORMONE.Aedes: 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.SesquiterpenesNeurosecretory Systems: 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.Corpus Callosum: 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.Neuropeptides: Peptides released by NEURONS as intercellular messengers. Many neuropeptides are also hormones released by non-neuronal cells.Insect Proteins: Proteins found in any species of insect.Larva: Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.Agenesis of Corpus Callosum: 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.Encyclopedias as Topic: 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)Endocrine Glands: Ductless glands that secrete HORMONES directly into the BLOOD CIRCULATION. These hormones influence the METABOLISM and other functions of cells in the body.Insects: 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)Methoprene: Juvenile hormone analog and insect growth regulator used to control insects by disrupting metamorphosis. Has been effective in controlling mosquito larvae.Butterflies: Slender-bodies diurnal insects having large, broad wings often strikingly colored and patterned.Heteroptera: 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)Vitellogenesis: 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.Hepatopancreas: 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.Endocrinology: A subspecialty of internal medicine concerned with the metabolism, physiology, and disorders of the ENDOCRINE SYSTEM.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.Endocrine System Diseases: Pathological processes of the ENDOCRINE GLANDS, and diseases resulting from abnormal level of available HORMONES.Hazardous Substances: 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.EncyclopediasManduca: A genus of sphinx or hawk moths of the family Sphingidae. These insects are used in molecular biology studies during all stages of their life cycle.Molting: Periodic casting off FEATHERS; HAIR; or cuticle. Molting is a process of sloughing or desquamation, especially the shedding of an outer covering and the development of a new one. This phenomenon permits growth in ARTHROPODS, skin renewal in AMPHIBIANS and REPTILES, and the shedding of winter coats in BIRDS and MAMMALS.Invertebrate Hormones: Hormones produced by invertebrates, usually insects, mollusks, annelids, and helminths.Pupa: An inactive stage between the larval and adult stages in the life cycle of insects.Bees: 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.Oligochaeta: A class of annelid worms with few setae per segment. It includes the earthworms such as Lumbricus and Eisenia.Tribulus: A plant genus of the family ZYGOPHYLLACEAE. Members contain steroidal saponins. Ingestion by grazing animals causes PHOTOSENSITIVITY DISORDERS called geeldikkop (yellow thick head) in South Africa.Plant Nectar: 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.Pollen: The fertilizing element of plants that contains the male GAMETOPHYTES.Nesting Behavior: Animal behavior associated with the nest; includes construction, effects of size and material; behavior of the adult during the nesting period and the effect of the nest on the behavior of the young.Endocrine Disruptors: 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.Endocrine Gland Neoplasms: Tumors or cancer of the ENDOCRINE GLANDS.Hormones: 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.Anatomy: A branch of biology dealing with the structure of organisms.Aggression: Behavior which may be manifested by destructive and attacking action which is verbal or physical, by covert attitudes of hostility or by obstructionism.Pheromones: Chemical substances, excreted by an organism into the environment, that elicit behavioral or physiological responses from other organisms of the same species. Perception of these chemical signals may be olfactory or by contact.Social Behavior: Any behavior caused by or affecting another individual, usually of the same species.Russia (Pre-1917)Acanthocephala: A phylum of parasitic worms, closely related to tapeworms and containing two genera: Moniliformis, which sometimes infects man, and Macracanthorhynchus, which infects swine.Parasites: Invertebrate organisms that live on or in another organism (the host), and benefit at the expense of the other. Traditionally excluded from definition of parasites are pathogenic BACTERIA; FUNGI; VIRUSES; and PLANTS; though they may live parasitically.Viburnum: A plant genus in the family CAPRIFOLIACEAE. The common name derives from its traditional use for menstrual cramps. It is a source of viburnine, valerianic acid, vibsanin, and ursolic acid. Note that true cranberry is VACCINIUM MACROCARPON.Ants: Insects of the family Formicidae, very common and widespread, probably the most successful of all the insect groups. All ants are social insects, and most colonies contain three castes, queens, males, and workers. Their habits are often very elaborate and a great many studies have been made of ant behavior. Ants produce a number of secretions that function in offense, defense, and communication. (From Borror, et al., An Introduction to the Study of Insects, 4th ed, p676)Malaria: A protozoan disease caused in humans by four species of the PLASMODIUM genus: PLASMODIUM FALCIPARUM; PLASMODIUM VIVAX; PLASMODIUM OVALE; and PLASMODIUM MALARIAE; and transmitted by the bite of an infected female mosquito of the genus ANOPHELES. Malaria is endemic in parts of Asia, Africa, Central and South America, Oceania, and certain Caribbean islands. It is characterized by extreme exhaustion associated with paroxysms of high FEVER; SWEATING; shaking CHILLS; and ANEMIA. Malaria in ANIMALS is caused by other species of plasmodia.

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)

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.
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 ...
Shop Juvenile hormone acid O-methyltransferase ELISA Kit, Recombinant Protein and Juvenile hormone acid O-methyltransferase Antibody at MyBioSource. Custom ELISA Kit, Recombinant Protein and Antibody are available.
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 ...
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.
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...
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 ...
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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)
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)
NyGuard IGR Concentrate is a juvenile hormone mimic which delivers strong IGR performance, and is especially effective against mosquitoes and other flying pests.
... - 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. ...
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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 ...
REGIS, Lêda et al. Secretory activity and endocrine regulation of male accessory glands in the blood-sucking bug Panstrongylus megistus (Hemiptera: Reduviidae). Mem. Inst. Oswaldo Cruz [online]. 1987, vol.82, suppl.3, pp.75-78. ISSN 0074-0276. http://dx.doi.org/10.1590/S0074-02761987000700015.. The epithelial cells of Panstrongylus megistus male accessory glands (MAG) present ultrastructural characteristics of a secretory cell. Their secretory products are accumulated in the lumen of the four MAG lobes. During the first 8 days of adult life a strong secretion activity occurs, accumulating enough material to produce the first spermatophore. Cerebral neurosecretions as well as juvenile hormone are both involved in MAG secretory activity regulation. Juvenile hormone seems to be the responsible for the stimulation of most protein synthesis in male accessory glands. Cerebral neurosecretion seems to be necessary to stimulate juvenile hormone production and release by the corpus allatum. Furthermore, ...
The roles of juvenile hormone III (JH III) on phase changes and pheromone production were examined in laboratory-reared gregarious desert locust, Schistocerca gregaria (Forskal). The hormone was applied to 5th instar nymphs and newly emerged adult locusts. Generally, the 5th instar nymphs exhibited a higher sensitivity to hormone treatments than the adults. Hormone applications inhibited pheromone production (as measured by the amounts of phenylacetonitrile released). In addition, JH III had a significant effect on the external colouration and absorbance ratios of the haemolymph pigments. It is concluded that the effects of exogenous JH III on gregarious locusts represent a shift towards the solitarious phase ...
One major contribution of the corpus-based approach to language study is the facility with which linguists can access large amounts of data and search for regularities across text types and varieties of English on the basis of observed frequencies. Such regularities of features, if based on well-designed and/or specialised corpora, can be useful for classroom activities and material design. This chapter describes the basic steps involved in corpus design and corpus exploitation. Section 1 defines the corpus and briefly states the relevance of investigating English second language (ESL) varieties via a corpus. Section 2 describes key steps involved in simple corpus compilation and how students can compile their own corpora for research. Section 3 presents results of two studies on the frequency and use of modals in the corpus of Cameroonian English. These results are intended to illustrate the point that the corpus approach is indispensable if certain types of linguistic information are investigated in a
Discover Lifes page about the biology, natural history, ecology, identification and distribution of Pelidnota punctata, Grapevine Beetle image
Discover Lifes page about the biology, natural history, ecology, identification and distribution of Pelidnota punctata, Grapevine beetle image
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Farnesol (FOH) is an isoprenoid alcohol that may be endogenously generated within the cells by enzymatic dephosphorylation of farnesyl pyrophosphate (FPP), an intermediate of the metabolic pathway yielding sterols and other isoprenoid compounds from mevalonate (4). In addition to geranylgeranyl pyrophosphate, FPP also plays an important role as a precursor of protein prenylation such as in the posttranslational modification of oncogenic RAS proteins and other GTP-binding proteins (11). When exogenously added to the medium, FOH is subjected to either phosphorylation, yielding FPP, or oxidation, to give farnesal, farnesoic acid, and prenyldicarboxylic acid in mammalian cells (4). Recently, FOH has attracted much attention since it causes apoptotic cell death of human acute leukemia CEM-C1 cells (15, 20) and HL-60 cells (23). Interference with a phosphatidylinositol type of signaling has been proposed to be a cause of apoptosis in FOH-treated mammalian cells. In our previous study, FOH was found to ...
Abstract In November 1991, during a five-month dengue outbreak, we performed epidemiologic and serologic surveys linked to an earlier entomologic study in a community of 425 houses in Yanes (Florida), Puerto Rico. We obtained a household response rate of 95% (98 of 103) and blood samples from 84% (345 of 410) of the participants. Dengue incidence, as volunteered by the respondents, was 5% (21 of 410), but serologic diagnosis (immunoglobulin M and IgG-enzyme-linked immunosorbent assays [ELISA]) indicated a recent infection rate of 18% (59 of 331). The presence of anti-dengue antibodies was detected in 277 (84%) of 331 persons tested. In our final sample of 65 households and 112 persons, we analyzed (by univariate and multivariate logistic regression methods) the association of 12 entomologic, environmental, and behavioral variables with the proportion of household members with laboratory-confirmed recent dengue. The number of female Aedes aegypti per person was the only significant (P = 0.02) household
BioAssay record AID 220247 submitted by ChEMBL: Tested for juvenile hormone mimetic activity in Tenebrio molitor (yellow mealworm) excluding from the analysis for activity against Anopheles aegypti).
Dengue is a mosquito-borne infectious disease caused by the dengue virus, which is mainly found in the tropical regions. This is transmitted by the bite of an infected female Aedes mosquito. Dengue fever is caused by one of four different but related viruses. There are four distinct serotypes of the dengue virus (DEN 1, DEN 2, DEN 3 and DEN 4). Dengue is not contagious and does not spread from person to person by physical contact. Dengue fever can occur to people of all ages. Children usually have a milder disease than adults.
Patrick Griffin, chair of the Scripps Research Department of Molecular Therapeutics and director of the Translational Research Institute at Scripps Florida, has won a three-year grant of more than $1.2 million from the National Cancer Institute of the NIH to develop a series of high-throughput screening tests that will help speed the discovery of potential small molecule therapies for breast cancer and cardiovascular disease. The tests will focus on identifying ligands for the orphan nuclear receptor liver receptor homolog-1 or LRH-1, which plays a crucial role in hormone-driven breast cancer through its regulation of genes involved in hormone biosynthesis as well as fat and cholesterol metabolism-key risk factors in cardiovascular disease ...
Procoralan agisce sullattività elettrica del muscolo cardiaco, rallentando la frequenza del battito. Livabradina è impiegata in specifici soggetti con insufficienza cardiaca cronica, per contribuire a ridurre il rischio di necessità di ricovero a seguito del peggioramento della sintomatologia. Livabradina non è indicata per chi presenta un peggioramento dei sintomi da insufficienza cardiaca già in atto prima di assumere il farmaco. Livabradina può essere impiegata anche per scopi diversi da quelli elencati in questa guida.. Generico Procoralan (Ivabradine 5mg) € 1.13 pillola - Malattie Cardiovascolari @ MyMedsBuy.com - Official Drug Store Online. buy viagra online
Definition of corpus geniculatum in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is corpus geniculatum? Meaning of corpus geniculatum as a legal term. What does corpus geniculatum mean in law?
Konig TENSOPRIL - Pret 69 RON -Fabricat in Canada. Hipertensiune Arteriala, Tahicardie, Angina Pectorala, Claudicare Intermitenta, Insuficienta Cardiaca
מועדון כושר ועיצוב גוף. מידע על קורסים, חוגים חדשות כושר ומאמרים. קורפוס - מועדון הכושר שלך.
While Hyalophora cecropia larvae are large and feed on a wide range of host plants, this species is not considered a serious pest in any parts of its range. Some populations of Hyalophora cecropia may be in decline due to a number of factors, including nontarget effects of introduced biological control agents. Boettner et al. (2000) suggested that the generalist parasitoid fly Compsilura concinnata (Diptera: Tachinidae) may be responsible for such declines in the northeastern U.S. Due to its size and hardiness, Hyalophora cecropia has been used extensively in physiological and biochemical research. Carroll Williams conducted pioneering work on juvenile hormone and its role in molting and metamorphosis using this species. Owing to its impressive size and appearance, Hyalophora cecropia has become a favorite of collectors and amateur Lepidopterists. Eggs and pupae are commercially available, and a small livestock industry has developed around this and other related species. ...
Shop Juvenile hormone esterase ELISA Kit, Recombinant Protein and Juvenile hormone esterase Antibody at MyBioSource. Custom ELISA Kit, Recombinant Protein and Antibody are available.
Use of Juvenile Hormone Analogues (JHA) in sericulture practices has been shown to boost good cocoon yield; their effect has been determined to be dose-dependent. We studied the impact of low doses of JHA compounds such as methoprene and fenoxycarb on selected key enzymatic activities of the silkworm Bombyx mori. Methoprene and fenoxycarb at doses of 1.0 μg and 3.0fg/larvae/48 hours showed enhancement of the 5th instar B. mori larval muscle and silkgland protease, aspartate aminotransaminase (AAT) and alanine aminotransaminase (ALAT), adenosine triphosphate synthase (ATPase) and cytochrome-c-oxidase (CCO) activity levels, indicating an upsurge in the overall oxidative metabolism of the B.mori larval tissues.
Satyanarayana, K.; Bhaskaran, G.; Dahm, K.H.; Meola, R., 1992: Regulation of vitellogenin synthesis by juvenile hormone in the corn earworm, Helicoverpa zea
Juvenile hormone bisepoxide (JHB3) biosynthesis, and its modulation in Drosophila melanogaster and Sarcophaga bullata by Don Xaine Billy; 1 edition; First published in 2006
Hormone Regulation Kit 1-Andro + 4-AD + Arom-X + 1-Androsterone Remember when Prohormones worked as advertised without harsh side effects or dangers?
Visite a su médico o a su profesional de la salud para chequear su evolución periódicamente. Controle su presión sanguínea y su frecuencia cardiaca regularmente mientras esté tomando este medicamento. Pregunte a su médico o su profesional de la salud cuáles deben ser su frecuencia cardiaca y su presión sanguínea y cuándo deberá comunicarse con él/ella.. Puede experimentar somnolencia o mareos. No conduzca ni utilice maquinaria, ni haga nada que le exija permanecer en estado de alerta hasta que sepa cómo le afecta este medicamento. No se ponga de pie ni se siente rápidamente, especialmente si es una persona de edad avanzada. Esto reduce el riesgo de mareos o desmayos. El alcohol puede aumentar los mareos y la somnolencia. Evite consumir bebidas alcohólicas.. Este medicamento puede afectar sus niveles de azúcar en la sangre. Si tiene diabetes, consulte con su médico o con su profesional de la salud antes de cambiar su dieta o la dosis de su medicamento para la diabetes.. No se ...
Definition of Suspension of habeas corpus in the United States in the Financial Dictionary - by Free online English dictionary and encyclopedia. What is Suspension of habeas corpus in the United States? Meaning of Suspension of habeas corpus in the United States as a finance term. What does Suspension of habeas corpus in the United States mean in finance?
Leukonychia Punctata Possible Causes (Differential Diagnoses) include ❗ Congenital Leukonychia ❗ Rheumatoid Arthritis ❗ Diabetes Mellitus ❗ Check more at Symptoma.com
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Dove ordinare Aspirin and Dipyridamole non prescritti. Dipyridamole si usa per la la valutazione di malattia darteria coronaria in pazienti che non possono allenarsi adeguatamente prima di formazione di immagini di tallio (la rapida lettura di corrente sanguigna cardiaca). ...
... - Dictionar termeni medicali - Acizi grasi care scad fibrinogenul si agregarea plachetara si cresc timpul de sangerare. Alte caracteristici: reduc intinderea zonei de necroza cardiaca post-infarct recent, regularizeaza
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 ...
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 ...
... 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. ...
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 though paracrine action on the corpora allata.[citation needed] In mature organisms, ...
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), 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.) ( ...
Among queenless B. terrestris workers, the corpora allata, which secrete JH, was noticeably enlarged compared to queenright ...
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 ...
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 jeuvanile hormones, and the prothorocic glands ... 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 ...
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 ...
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 ...
... released by the corpora allata (CA), is necessary for the production and release of the sex pheromone. The CA releases JH which ...
In insect physiology, the corpus allatum (plural: corpora allata) is an endocrine gland which generates juvenile hormone; as ... 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 ...
Further evidence shows that foundresses that have a larger corpora allata, a region of the female wasp brain responsible for ...
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 ...
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... ...
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. ...
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 ...
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 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 ...
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. ...
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 ...
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 ...
No activity was detected in the corpora cardiaca-corpora allata complex. At the time of ecdysis the store of activity dropped ...
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 ...
Among queenless B. terrestris workers, the corpora allata, which secrete JH, was noticeably enlarged compared to queenright ...
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 ...
On the other hand, a hormone secreted by the corpora allata inhibits metamorphosis until late larval development. A hormone ...
While allatectomy [i.e. removal of the corpora allata (CA), a pair of glands attached to the brain where JH is being produced] ... 1977). Precocene II inhibits juvenile hormone biosynthesis by cockroach Corpora allata in vitro. Nature 265, 548-550. ... 2005a). Effect of exogenous juvenile hormone III and precocene II on agonistic behavior and the corpora allata in vitro ... 1989). Ultrastructural changes induced by precocene II and 3,4-dihydroprecocene II in the corpora allata of Blattella germanica ...
A larger corpora allata also influences the determination of dominance. A higher reproductive capacity is indicative of the ...
  • corpus al´bicans white fibrous tissue that replaces the regressing corpus luteum in the human ovary in the latter half of pregnancy, or soon after ovulation when pregnancy does not supervene. (thefreedictionary.com)
  • At the same time, it was suggested elsewhere that the activity of the HPGs and the production of vitellogenin were coregulated by the corpora allata brain complex ( 5 ). (pnas.org)
  • This study reports that in the corpora allata of the cricket, Gryllus bimaculatus , Myoglianin ( Gb 'Myo), a homolog of Drosophila Myoglianin /vertebrate GDF8/11, is involved in the down-regulation of JH production by suppressing the expression of a gene encoding JH acid O -methyltransferase, Gb ' jhamt . (sdbonline.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 corpora allata glands are two globular organs found on the sides of the esophagus, behind the brain in both larvae and adults. (beeculture.com)
  • 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)
  • however, these studies have been limited because of the inability to reduce JH levels without surgically removing its glandular source, the corpora allata. (biologists.org)
  • 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)
  • The biosynthetic activity of the Aedes aegypti corpora allata (CA) in vitro was inhibited by factors present in the head. (semanticscholar.org)
  • 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)
  • 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)