article{CIS-139656, Author = {Sandoval, Monica C. and Bolfarine, Heleno and Lima, Claudia R. O. P. and Sandoval, Mônica C.}, Title = {Linear calibration in functional regression models}, Journal = {Communications in Statistics: Theory and Methods}, Volume = {26}, Year = {1997}, Pages = {2307--2328}, Keywords = {Maximum likelihood estimator, Bias ...
Advances in Decision Sciences is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of decision sciences.
The origin and physiological significance of high pulses of prostaglandin F2α (PGF2α) in uterine venous blood that occur 2-3 days after luteolysis are not well understood. We studied the relationship between contractions of the uterus evoked by exogenous oxytocin (OT) and PGF2α concentration in uterine venous blood on day 17 of the porcine oestrous cycle. The infusion of OT into the uterine artery produced an immediate increase in the uterine intraluminal pressure (UIP) (p , 0.001) and a simultaneous elevation in PGF2α concentration in uterine venous blood (p , 0.0001). The infusion of indomethacin (IND) into the uterine artery slightly decreased PGF2α concentration in uterine venous blood, but it did not suppress uterine contraction or the rapid increase in PGF2α concentration in uterine venous blood just after OT infusion (p , 0.0001), which was lower that in gilts not treated with IND. We conclude that the spikes of PGF2α concentration in uterine venous blood occurring after OT ...
We propose a new approach to functional regression based on fuzzy evidence theory. This method uses a training set for computing a fuzzy belief structure which quantiies diierent types of uncertainties, such as nonspeciicity, connict, or low density of input data. The method can cope with a very large class of training data, such as numbers, intervals , fuzzy numbers, and, more generally, fuzzy belief structures. In order to limit calculations and improve output readability, we propose a belief structure simpliication method, based on similarity between fuzzy sets and signiicance of these sets. The proposed model can provide predictions in several diierent forms, such as numerical, probabilistic, fuzzy or as a fuzzy belief structure. To validate the model, we propose two simulations and compare the results with classical or fuzzy regression methods.
The mechanisms causing luteolysis of the primate corpus luteum are unknown. There is an increase in expression of liver x receptor (LXR) target genes and reduced low density lipoprotein receptor (LDLR) during spontaneous luteolysis in primates. The LXRs belong to the nuclear receptor superfamily and increase cholesterol efflux by inducing transcription of their target genes. Uptake of cholesterol into primate luteal cells occurs primarily via LDL, and LDLR transcription is regulated by sterol regulatory element binding transcription factor 2 (SREBF2). Luteinizing hormone (LH) and human chorionic gonadotropin (hCG) maintain luteal function by binding to the LH/CG receptor (LHCGR), which stimulates progesterone (P4) synthesis via protein kinase A (PKA). It has also been previously reported that there is an increase in 27-hydroxycholesterol (27OH) concentrations during spontaneous luteolysis in primates. Pregnenolone and P4 inhibit the enzyme activity of CYP27A1 (cytochrome p450, family 27, ...
Gentaur molecular products has all kinds of products like :search , Zyagen \ Bovine Corpus Luteum* cDNA \ BD-417 for more molecular products just contact us
Principal Investigator:OKUDA Kiyoshi, Project Period (FY):2013-04-01 - 2015-03-31, Research Category:Grant-in-Aid for Challenging Exploratory Research, Research Field:Animal production science
SUGINO Norihiro , OKUDA Kiyoshi Luteolysis is defined as the loss of function and subsequent involution of the luteal structure. The luteolytic process is usually subdivided, whereby the decline in progesterone is described as funct … Journal of Reproduction and Development 53(5), 977-986, 2007-10-01 J-STAGE Ichushi Web References (65) Cited by (4) ...
As the blood is resorbed, a solid Corpus Luteum is formed by proliferation of granulosa and theca intera cells as well as blood vessels. This remains on the surface of the ovary ...
As the blood is resorbed, a solid Corpus Luteum is formed by proliferation of granulosa and theca intera cells as well as blood vessels. This remains on the surface of the ovary ...
Sotiris, A. and Prokopiou, S. A. and Byrne, H. M. and Jeffrey, M. R. and Robinson, R. S. and Mann, G. E. and Owen, M. R. (2013) Mathematical analysis of a model for the growth of the bovine corpus luteum. Journal of Mathematical Biology . (Submitted) ...
The corpus luteum (CL) is a temporary organ involved in the maintenance of pregnancy. In the course of its life-cycle, the CL undergoes two distinct and consecutive processes for its inevitable removal through apoptosis: functional and structural luteolysis. We isolated a gene encoding for a novel rat zinc finger protein (ZFP), named rat ZFP96 (rZFP96) from an ovarian lambda cDNA library. Sequence analysis revealed close sequence and structural similarity to mouse ZFP96 and human zinc finger protein 305 (ZNF305). Quantitative reverse transcription-polymerase chain reaction analysis revealed a positive correlation with the end of pregnancy, that is, the onset of structural luteolysis of the CL. Messenger RNA levels increased 3-fold (P < 0.01) between days 13 and 22 of pregnancy and 8-fold (P < 0.01) between day 13 of pregnancy and day 1 post-partum. In addition, we detected rZFP96 expression in mammary, placenta, heart, kidney and skeletal muscle. Sequence analysis predicted that rZFP96 has a ...
Ma, T.; Jiang, H.; Gao, Y.; Zhao, Y.; Dai, L.; Xiong, Q.; Xu, Y.; Zhao, Z.; Zhang, J., 2012: Microarray analysis of differentially expressed microRNAs in non-regressed and regressed bovine corpus luteum tissue; microRNA-378 may suppress luteal cell apoptosis by targeting the interferon gamma receptor 1 gene
Immature Lucilia sericata (Meigen) raised on beef liver, beef heart, pork liver and pork heart at a mean temperature of 20.6°C took a minimum of 20 days to complete development. Minimum development time differences within stages were observed between the meat types (pork/beef), but not the organ types (liver/heart). Daily hyperspectral measurements were conducted and a functional regression was completed to examine the main effects of meat and organ type on daily spectral measurements. The model examined post feeding larval spectral measurements of insects raised on beef liver alone, the effect of those raised on pork compared with those raised on beef, the effect of those raised on heart compared with those raised on liver and the interactional effect of those raised on pork heart compared with those raised on beef liver ...
In ruminants, uterine pulses of prostaglandin (PG) F 2α characterize luteolysis, while increased PGE 2 /PGE 1 distinguish early pregnancy. This study evaluated intrauterine (IU) infusions of PGF 2α and PGE 1 pulses on corpus luteum (CL) function and gene expression. Cows on day 10 of estrous cycle received 4 IU infusions (every 6 h; n = 5/treatment) of saline, PGE 1 (2 mg PGE 1), PGF 2α (0.25 mg PGF 2α), or PGE 1 + PGF 2α. A luteal biopsy was collected at 30 min after third infusion for determination of gene expression by RNA-Seq. As expected, IU pulses of PGF 2α decreased (P , 0.01) P4 luteal volume. However, there were no differences in circulating P4 or luteal volume between saline, PGE 1, and PGE 1 + PGF 2α, indicating inhibition of PGF 2α -induced luteolysis by IU pulses of PGE 1. After third pulse of PGF 2α, luteal expression of 955 genes were altered (false discovery rate [FDR] , 0.01), representing both typical and novel luteolytic transcriptomic changes. Surprisingly, after ...
Thus, it turns out that the corpus luteum in the ovary is formed in the body of a woman every month, and every month resolved.Its perfectly normal to experience and because of this is meaningless.However, there is a likelihood that in case of pregnancy, the corpus luteum does not resolve, and continue to produce progesterone, or after pregnancy the corpus luteum will continue to grow.In this case we speak of the corpus luteum cyst.. cystic corpus luteum usually has a larger than usual size.In this case, the symptoms are the same as during pregnancy: delayed menstruation, nagging feeling in the stomach, its all a result of the work of the hormone.However, pregnancy test gives a negative result.However, most of this state and is not at risk, even during pregnancy.. However, a cyst could still be a problem, if it is too large.In this case, the cyst may burst as a result of mechanical action.For example, if a large impact or physical exertion.And it is internal bleeding, ie the state, threatening ...
Corpus luteum cysts could be agonizing and might set off alterations in menstrual bleeding. Generally this type of cyst will dissolve on its own personalized inside of of various months of forming. At other situations, nonetheless, these are in a position to expand becoming rather substantial and heavy. The fat in the cyst may well trigger the ovary to increase for being twisted. A twisted ovary is incredibly agonizing and may phone for well-being-related consideration. And it actually is this ache that typically leads females to look for out the support of their health care medical doctor ...
TY - JOUR. T1 - Histologische und hormonelle Untersuchungen am Corpus luteum des Rindes.. AU - Okuda, Kiyoshi. PY - 1984. Y1 - 1984. M3 - Article. VL - 19. SP - 169. EP - 181. JO - Zuchthygiene. JF - Zuchthygiene. ER - ...
Free essay sample about Corpus Luteum, a hormone-secreting structure, one of medical writing topics. Find more free medicine essays and research papers on our site.
Gecaj, Rreze M.; Schanzenbach, Corina I.; Kirchner, Benedikt; Pfaffl, Michael W.; Riedmaier, Irmgard; Tweedie-Cullen, Ry Y.; Berisha, Bajram (2017): The Dynamics of microRNA Transcriptome in Bovine Corpus Luteum during Its Formation, Function, and Regression. In: Frontiers in Genetics, Vol. 8, 213 [PDF, 2MB] ...
A Corpus luteum cyst is a type of ovarian cyst which may rupture about the time of menstruation, and take up to three months to disappear entirely. A corpus luteum cyst rarely occurs at age 50+, because eggs are no longer being released in menopausal women. Corpus luteum cysts may contain blood and other fluids. The physical shape of a corpus luteum cyst may appear as an enlargement of the ovary itself, rather than a distinct mass -like growth on the surface of the ovary. This type of functional cyst occurs after an egg has been released from a follicle. The follicle then becomes a secretory gland that is known as the corpus luteum. The ruptured follicle begins producing large quantities of estrogen and progesterone in preparation for conception. If a pregnancy doesnt occur, the corpus luteum usually breaks down and disappears. It may, however, fill with fluid or blood, causing the corpus luteum to expand into a cyst, and stay in the ovary. Usually, this cyst is on only one side, and does not ...
Define corpus luteum hormone. corpus luteum hormone synonyms, corpus luteum hormone pronunciation, corpus luteum hormone translation, English dictionary definition of corpus luteum hormone. n another name for progesterone
Optimizing CL regression in specific groups of cows may be particularly challenging; hence, new alternatives should be explored to increase CL regression during the TAI protocols. The current study is the first to show the effect of administrating the luteolytic dose of PG in two injections on days 5 and 6 of the TAI protocol after of estrus expression comparing to the Cosynch protocol in a large dairy herd. This is the first study to demonstrate that the two PG injections can increase P/AI in different seasons without any P4 supplementation.. As in the previous study (Alnimer and Ababneh, 2014), the interval between the PG injection and the start of the treatment was an approach that simulated Presynch 14 protocol with one less PG injection and increased stage synchronization at the beginning of the protocols (Moreira et al., 2001; Vasconcelos et al., 1999). However, the interval from the setup injection of PG on Day 30 pp to the detection of estrus in the EPG-PG and ECO-72 groups complicated ...
Looking for online definition of corpora lutea in the Medical Dictionary? corpora lutea explanation free. What is corpora lutea? Meaning of corpora lutea medical term. What does corpora lutea mean?
This article starts with a review of the literature regarding the normal reproductive physiology of the mare, normal luteolysis, different causes of prolonged luteal phase and theories behind these. The article also presents a study where it was examined if treatment with human choriongonadotropic hormone (hCG) during the luteal phase induces prolonged luteal phase in mares, thus preventing estrus. The study consisted of two parts: one intensive study of eight mares at the former Department of Obstetrics and Gynaecology at SLU, Uppsala, Sweden and one field study of seven mares at a stud farm 70 km north of Uppsala. The mares in the intensive study were divided in two groups: one with four mares that were injected with hCG in luteal phase when they had a follicle of minimum 30 mm and a second group with four mares that were injected with sodium chloride at the same time. These mares were examined with ultrasonography and blood samples. The blood samples were analyzed for progesterone with a ...
The corpus luteum (plural: corpora lutea) is a temporary endocrine structure involved in ovulation and early pregnancy. During ovulation, the primary follicle forms the secondary follicle and subsequently the mature vesicular follicle. At ovula...
View Notes - Sexual Structures from BIO BSC1010 at Broward College. a luteal phase (presence of the corpus luteum ). These cyclic phases are interrupted only by pregnancy and continue until
Our objective was to evaluate the effect of a second PGF2α treatment (25 mg of dinoprost) or a double dose of PGF2α (50 mg of dinoprost) during a Resynch protocol on luteal regression and pregnancies per artificial insemination (P/AI) in lactating dairy cows. Lactating Holstein cows (n = 1,100) were randomly assigned at a nonpregnancy diagnosis to receive (1) Ovsynch (control: 100 µg of GnRH; 7 d, 25 mg of PGF2α; 56 h, 100 µg of GnRH), (2) Ovsynch with a second PGF2α treatment (GPPG: 100 µg of GnRH; 7 d, 25 mg of PGF2α; 24 h, 25 mg of PGF2α; 32 h, 100 µg of GnRH), or (3) Ovsynch with a double dose of PGF2α (GDDP: 100 µg of GnRH; 7 d, 50 mg of PGF2α; 56 h, 100 µg of GnRH ...
1. Sepharose 6B gel-filtration analysis of soluble adenylate cyclase from bovine corpus luteum is described. Both zonal and frontal techniques of analysis were used. 2. Under conditions of zonal analysis recoveries of activity were low. It was concluded that dissociation of two or more components of the adenylate cyclase complex was occurring on the column and that the maintenance of the complex was essential for the high-activity state of the catalytic unit. Two peaks of adenylate cyclase activity, of approximate mol. wts. 45,000 and 160,000 were detected. 3. The theory of frontal analysis (or steady-state gel filtration), applied to the study of the interacting components of the adenylate cyclase complex is discussed, and activity profiles are predicted. Activity profiles obtained experimentally be frontal analysis compared well with the theoretically predicted profile and provide evidence that dissociation of a high-activity complex, with concomitant loss of activity, does occur. Recoveries ...
The objective of the present study was to investigate in rabbit corpora lutea (CL), at both the cellular and molecular level, intraluteal cyclooxygenase (COX)-1, COX-2 and prostaglandin (PG) E2-9-ketoreductase (PGE2-9-K) enzymatic activities as well as in vitro PGE2 and PGF2alpha synthesis following PGF2alpha treatment at either early- (day-4) or mid-luteal (day-9) stage of pseudopregnancy. By immunohistochemistry, positive staining for COX-2 was localized in luteal and endothelial cells of stromal arteries at both the stages. In CL of both stages, basal COX-2 mRNA levels were poorly expressed, but rose (P , 0.01) 4- to 10-fold 1.5-6 h after treatment and then gradually decreased within 24 h. Compared to mid-stage, day-4 CL had lower (P , 0.01) COX-2 and PGE2-9-K basal activities, and PGF2alpha synthesis rate, but higher (P , 0.01) PGE2 production. Independent of luteal stage, PGF2alpha treatment did not affect COX-1 activity. In day-4 CL, PGF2alpha induced an increase (P , 0.01) in both COX-2 ...
Looking for online definition of cloprostenol in the Medical Dictionary? cloprostenol explanation free. What is cloprostenol? Meaning of cloprostenol medical term. What does cloprostenol mean?
Build: Wed Jun 21 18:33:50 EDT 2017 (commit: 4a3b2dc). National Center for Advancing Translational Sciences (NCATS), 6701 Democracy Boulevard, Bethesda MD 20892-4874 • 301-435-0888. ...
A hormone produced by the corpus luteum that prepares a uterus for the impanation of fertilized ovum, maintains pregnancy and also promotes development of the mammary glands.
Polütsüstilised munasarjad ehk munasarjade polütsüstiline haigus (lühend PCO) - munasarjad on mahult suurenenud ja sisaldavad arvukalt perifeerselt paiknevaid tsüste, mille suurus võib ulatuda kuni 8 millimeetrini. Tsüstide näol on tegemist lõpuni küpsemata folliikulitega (munarakualged). PCOSi kandvad naised ongi sageli viljatud tulenevalt sellest, et munarakk ei ole lõpuni arenenud, ei teki ovulatsiooni (munarakk ei vabane) ning ei moodustu kollakeha (corpus luteum). [5] Polütsüstilised munasarjad tekivad, kui munasarjad on mingil põhjusel hakanud tootma ülemäärast kogust androgeene (meessuguhormoone), eelkõige testosterooni, mille põhjuseks võivad olla kas hüpofüüsi poolt toodetud liigne luteiniseeriv hormoon (LH) või liigne insuliin veres (hüperinsulineemia), naiste hulgas, kelle munasarjad on tundlikud liigsele insuliinile. [2] [8] [7] ...
Menstru ci s zavarok s vagy medd s g luteum praemenstruati s syndroma oedema-k pz d s fejf j s sz kreked s psych s fibrocyst s mastopathia.
Evidence as to the precise role of the corpus luteum during pregnancy is contradictory, especially when different species are compared. Most observers agree that the presence of the corpus luteum is necessary during the early stages of gestation. During the second half of pregnancy, however, the removal of the corpus luteum in certain animals does not lead to immediate abortion. In the guinea-pig Loeb and Hesselberg (1917), Herrick (1928) and Courrier, Kehl and Raynaud (1929) have found that pregnancy may continue for some weeks after double ovariectomy, and Ash-Upmark (1926) has listed a large number of clinical cases in which ovariectomy in women has not disturbed pregnancy. The evidence for the rabbit (summarised by Hammond, 1925), is slightly contradictory, but tends to show that the corpus luteum is necessary during the whole of pregnancy, although this was not the conclusion of Niskoubina (1909). In the rat it appears that double ovariectomy towards the end of pregnancy does not always ...
TY - JOUR. T1 - The function and regulation of the primate corpus luteum during the fertile menstrual cycle.. AU - Stouffer, Richard. AU - Ottobre, J. S.. AU - Molskness, T. A.. AU - Zelinski, Mary. PY - 1989. Y1 - 1989. N2 - Figure 2 summarizes the changes in endocrine function and the factors which regulate the primate corpus luteum during the fertile menstrual cycle. The classical luteotropic role of LH during the menstrual cycle is superceded by CG at or before the time of implantation. The role of local factors in modulating luteal function is an area of continued research, as some factors are deemed less important (i.e., estrogen, at least prior to luteal rescue) and other possibilities (progesterone, prostaglandins, and relaxin) arise. The role of local factors has not yet been studied in the corpus luteum following its rescue in early pregnancy. Finally, it is apparent that a different type of "shift" precedes the recognized luteal-placental shift in early pregnancy, when the corpus ...
Define luteotropic. luteotropic synonyms, luteotropic pronunciation, luteotropic translation, English dictionary definition of luteotropic. adj. affecting the corpus luteum
The objective was to characterize effects of Escherichia coli LPS (given iv) on corpus luteum (CL) and embryonic viability in early pregnant cattle. Eight non-lactating German Holstein cows were given 0.5 µg/kg LPS on 35 ± 3 d (mean ± SEM) of pregnancy, whereas seven heifers, 41 ± 6 d pregnant, were given 10 ml saline (Control group). Transrectal B-mode examinations of the CL were done at -1, 3, 6, 12, 24, 48, 72, and 96 h relative to treatment. Blood samples were collected at -1, 0.5, 1, 2, 3, 4, 6, 9, 12, 24, 48, 72, and 96 h. At 12 and 48 h, the CL was biopsied. None of the cows still in the experiment 10 d after LPS (n=7) had embryonic loss. In LPS-treated cows, luteal area decreased (from 4.1 to 3.1 cm2; P≤0.05) within 6 h and until 48 h. Luteal blood flow decreased by 39% (P≤0.05) within the first 6 h after LPS, but returned to pre-treatment values by 48 h. Plasma P4 decreased by 62% (P≤0.05), reached a nadir (2.7±0.6 ng/mL) at 12 h after LPS and was not restored to ...
A modified superfusion technique is described with which it was demonstrated that the action of gonadotrophin on progesterone secretion by pig corpus luteum tissue is twofold, in that it first stimulates the rapid release of progesterone (either performed or partially synthesized), which is followed by prolonged synthesis of the steroid de novo from acetate.. ...
File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR ...
Marsh, Karen; Sliney, Kyle; La Barbera, Andrew R. (University of Cincinnati. College of Medicine; University of Cincinnati, 2007-02-06) ...
Corpus Albicans Definition - A corpus albicans is a mass of white scar tissue in the ovary that is formed after the degeneration of the corpus luteum...
Tytuł projektu: Rozbudowa i przekształcenie bibliograficznej bazy danych AGRO w bazę bibliograficzno-abstraktową z wykorzystaniem oprogramowania YADDA. Nr umowy: POIG 02.03.02-00-031/09 (okres realizacji 2009-2013 ...
After ovulation, the pituitary hormones-FSH and LH released from the anterior pituitary cause the remaining parts of the dominant follicle to transform into the corpus luteum. It continues to grow for some time after ovulation and produces significant amounts of hormones, particularly progesterone,[3] and, to a lesser extent, estrogen. Progesterone plays a vital role in making the endometrium receptive to implantation of the blastocyst and supportive of the early pregnancy; it also has the side effect of raising the womans basal body temperature.[4][medical citation needed] The increased progesterone and BBT will cause at least a modest rise in BMR at the start of the luteal phase and remains in an elevated state until the phase ends. Research has discrepant findings on how much of an increase typically occurs and how much it can vary. Early, small sample studies have found various figures, such as; a 6% higher postovulatory sleep metabolism,[5] a 7% to 15% higher 24 hour expenditure following ...
Recent studies suggest that chemokines may mediate the luteolytic action of PGF2α (PGF). Our objective was to identify chemokines induced by PGF in vivo and to determine the effects of IL8 on specific luteal cell types in vitro. Midcycle cows were injected with saline or PGF, ovaries were removed after 0.5 - 4 h and chemokine expression was analyzed by qPCR. In vitro expression of IL8 was analyzed after PGF administration and with cell signaling inhibitors to determine the mechanism of PGF-induced chemokine expression. Purified neutrophils were analyzed for migration and activation in response to IL8 and PGF. Purified luteal cell types (steroidogenic, endothelial and fibroblast cells) were used to identify which cells respond to chemokines. Neutrophils and peripheral blood mononuclear cells (PBMCs) were co-cultured with steroidogenic cells to determine their effect on progesterone production. IL8, CXCL2, CCL2, and CCL8 transcripts were rapidly increased following PGF treatment in vivo and. The
Printed in Great Britain A WECKMAN and others Autophagy in the endocrine Overview of autophagy in endocrine glands Autophagya function as currently known Location: both crinophagy and macroautophagy demonstrated in all secretory cell types of the anterior pituitaryRole: crinophagy is both a mechanism for normal turnover of secretory material and a means to deal with production of excess secretory material Regulates/maintains proper intracellular levels of secretory protein Control: suggested modulation of crinophagy by steroidsRole: macroautophagy appears to be responsible for the turnover of peptide-synthesising machinery (ER, ribosomes) rather than secretory granules Note: lack of recent research; mechanism and role remains poorly understood Location: macroautophagy demonstrated in ovaries of various mammals including humansRole: required for germ cell survival during ovary development, involved also in granulosa cell survival and cell death, follicular atresia and CL regression Control: ...
Overall appearance is of large volume hemorrhage centered on the left ovary, and this is most likely due to a ruptured corpus luteum. ​Findings were confirmed intraoperatively. Differential consideration in a pregnant patient would be a ruptured ...
PROGESTERONE-producing cells in the CORPUS LUTEUM. The large luteal cells derive from the GRANULOSA CELLS. The small luteal cells derive from the THECA CELLS.
oestrogen stimulates LH production. LH produced by pituitary gland. LH stimulates ovulation LH stimulates formation of corpus luteum LH stimulates production of progesterone (by corpus luteum). progesterone maintains / thickens uterine lining LH inhibits FSH production without ovulation there is no egg release / no egg to fertilise. ...