Dynamic changes in gene expression that occur during the period of spontaneous functional regression in the rhesus macaque...
TY - JOUR. T1 - Dynamic changes in gene expression that occur during the period of spontaneous functional regression in the rhesus macaque corpus luteum. AU - Bogan, Randy L.. AU - Murphy, Melinda J.. AU - Hennebold, Jon D.. N1 - Copyright: Copyright 2012 Elsevier B.V., All rights reserved.. PY - 2009/3. Y1 - 2009/3. N2 - Luteolysis of the corpus luteum (CL) during nonfertile cycles involves a cessation of progesterone (P4) synthesis (functional regression) and subsequent structural remodeling. The molecular processes responsible for initiation of luteal regression in the pri mate CL are poorly defined. Therefore, a genomic approach was used to systematically identify differentially expressed genes in the rhesus macaque CL during spontaneous luteolysis. CL were collected before [d 10-11 after LH surge, mid-late (ML) stage] or during (d 14-16, late stage) functional regression. Based on P4 levels, late-stage CL were subdivided into functional-late (serum P4 , 1.5 ng/ml) and functionally regressed ...
CIS - Linear calibration in functional regression models
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 ...
Changes in progesterone and oestrogen receptor mRNA and protein during maternal recognition of pregnancy and luteolysis in ewes...
TY - JOUR. T1 - Changes in progesterone and oestrogen receptor mRNA and protein during maternal recognition of pregnancy and luteolysis in ewes. AU - Ott, T. L.. AU - Zhou, Y.. AU - Mirando, M. A.. AU - Stevens, C.. AU - Harney, J. P.. AU - Ogle, T. F.. AU - Bazer, F. W.. PY - 1993. Y1 - 1993. N2 - This study characterized changes in levels of mRNA and protein for endometrial oestrogen receptors (ERs) and progesterone receptors (PRs) during luteolysis and maternal recognition of pregnancy. For cyclic and pregnant ewes, endometrium was collected on days 10, 12, 14, or 16 post-oestrus (4 ewes/day for each status) for the measurement of ER and PR mRNA and protein. The amount of receptor mRNA is expressed in relative units above back-ground, measured from radiographs of dot-blot hybridization of total endometrial RNA with ER and PR cDNAs. At hysterectomy, jugular vein blood samples were collected and assayed for progesterone, total corpus luteum weight was recorded and, in vitro, endometrial ...
Some Asymptotic Theory for Functional Regression and Classification
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.
Relationship Between Contractions of the Uterus and Concentration of PGF2α in Uterine Venous Blood after Luteolysis in Gilts -...
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 ...
Handling Different Forms of Uncertainty in Regression Analysis: A Fuzzy Belief Structure Approach - Semantic Scholar
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.
Publication Detail
Title: Wavelet-based functional linear mixed models: an application to measurement error-corrected distributed lag models.. Authors: Malloy, Elizabeth J; Morris, Jeffrey S; Adar, Sara D; Suh, Helen; Gold, Diane R; Coull, Brent A. Published In Biostatistics, (2010 Jul). Abstract: Frequently, exposure data are measured over time on a grid of discrete values that collectively define a functional observation. In many applications, researchers are interested in using these measurements as covariates to predict a scalar response in a regression setting, with interest focusing on the most biologically relevant time window of exposure. One example is in panel studies of the health effects of particulate matter (PM), where particle levels are measured over time. In such studies, there are many more values of the functional data than observations in the data set so that regularization of the corresponding functional regression coefficient is necessary for estimation. Additional issues in this setting are ...
Role of nitric oxide in the regulation of superoxide dismutase and prostaglandin F<sub>2α</sub> production in bovine luteal...
TY - JOUR. T1 - Role of nitric oxide in the regulation of superoxide dismutase and prostaglandin F2α production in bovine luteal endothelial cells. AU - Lee, Seunghyung. AU - Acosta, Tomas J.. AU - Nakagawa, Yuji. AU - Okuda, Kiyoshi. N1 - Copyright: Copyright 2010 Elsevier B.V., All rights reserved.. PY - 2010/8. Y1 - 2010/8. N2 - Prostaglandin F2α (PGF) induces a rapid reduction in progesterone production (functional luteolysis) followed by tissue degeneration and cell death (structural luteolysis). Reactive oxygen species (ROS) including nitric oxide (NO) play crucial roles in the luteolytic action of PGF. The local concentration of intraluteal ROS is controlled by superoxide dismutase (SOD), the main enzyme involved in the control of intraluteal ROS. To clarify the roles of NO in the regulation of SOD in luteolysis, we examined the effects of NO on SOD expression and activity in cultured bovine luteal endothelial cells (LECs) during short-term (2 h, mimicking functional luteolysis) and ...
Nitric oxide in bovine corpus luteum: Possible mechanisms of action in luteolysis<...
TY - JOUR. T1 - Nitric oxide in bovine corpus luteum. T2 - Possible mechanisms of action in luteolysis. AU - Korzekwa, Anna. AU - Woclawek-Potocka, Izabela. AU - Okuda, Kiyoshi. AU - Acosta, Tomas J.. AU - Skarzynski, Dariusz J.. PY - 2007/6/1. Y1 - 2007/6/1. N2 - Although prostaglandin (PG) F2α is considered as the principal luteolytic factor, its action on the bovine corpus luteum (CL) is mediated by other intraovarian factors. Among them, nitric oxide (NO) seems to play a mandatory role in luteolysis. In this article we review the background and current status of work on possible roles of NO in the CL function, based on available information and our own experimental data. NO is produced in all three main types of bovine CL cells: steroidogenic, endothelial and immune cells. PGF2α and some luteolytic cytokines (tumor necrosis factor, interferon) increase NO production and stimulate NO synthase expression in the bovine CL. NO inhibits progesterone production, stimulates the secretion of ...
Analysis of microarray data from the macaque corpus luteum; the search for common themes in primate luteal regression<...
TY - JOUR. T1 - Analysis of microarray data from the macaque corpus luteum; the search for common themes in primate luteal regression. AU - Bishop, C. V.. AU - Bogan, R. L.. AU - Hennebold, J. D.. AU - Stouffer, R. L.. PY - 2011/3. Y1 - 2011/3. N2 - The factors and processes involved in regression of the primate corpus luteum (CL) are complex and not fully understood. Systemic identification of those genes that are differentially expressed utilizing macaque model systems of luteal regression could help clarify some of the important molecular events involved in loss of primate luteal structure and function during luteolysis. In addition, examining gene pathways involved in luteal regression may help elucidate novel approaches for overcoming infertility or designing ovary-based contraceptives. This review provides an overview of the current published microarray experiments evaluating the transcriptome of the macaque CL, and compares and contrasts the data from spontaneous, GnRH antagonist and ...
Browsing Masters Theses by Subjects
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, ...
Corpus Luteum Persisten dan Cara Penanganannya - Berbagi Informasi Mengenai Ilmu Veteriner
Corpus luteum persisten (CLP) merupakan suatu keadaan dimana corpus luteum tidak mengalami regresi dan tetap tinggal di ovarium dalam jangka waktu yang lama (,1 siklus birahi) meskipun hewan tidak bunting. Disebut persisten karena corpus luteum tetap besar ukurannya dan tetap berfungsi menghasilkan progesteron dalam waktu yang lama. Hormon progesteron berfungsi untuk mempertahankan kebuntingan, sehingga adanya progesteron akan menghambat pematangan folikel, ovulasi tidak terjadi dan menyebabkan hewan anestrus.. Corpus luteum persisten berasal dari corpus luteum normal seperti corpus luteum periodikum dan corpus luteum graviditatum. Corpus luteum periodikum adalah corpus luteum yang secara periodik ada pada setiap siklus birahi kemudian mengecil menjadi corpus albican akibat pelisisan karena pengaruh hormon PGF2α yang meningkat di akhir siklus birahi. Corpus luteum graviditatum adalah corpus luteum periodikum yang dipertahankan karena adanya kebuntingan dan lisis setelah hewan melahirkan atas ...
Possible action of vasohibin-1 as an inhibitor in the regulation of vascularization of the bovine corpus luteum - Zurich Open...
The development of the corpus luteum (CL), which secretes large amounts of progesterone to establish pregnancy, is accompanied by active angiogenesis, vascularization, and lymphangiogenesis. Negative feedback regulation is a critical physiological mechanism. Vasohibin-1 (VASH1) was recently discovered as a novel endothelium-derived negative feedback regulator of vascularization. We therefore investigated the expression of VASH1 in the bovine CL. Expression of VASH1 mRNA and protein was predominantly localized to luteal endothelial cells (LECs). VASH1 expression in the CL was constant through the early to late luteal phases and decreased during CL regression relating with the action of luteolytic prostaglandin F(2)(α) in vivo. To investigate the role of VASH1, we determined whether VASH1 treatment affects angiogenesis and/or lymphangiogenesis using LECs and lymphatic endothelial cells (LyECs) in vitro. Vascular endothelial growth factor A (VEGFA) stimulated the expression of VASH1 in LECs but ...
Sows that fail to become pregnant show luteal regression at day 13 after mating</em>...
TY - CONF. T1 - Sows that fail to become pregnant show luteal regression at day 13 after mating. AU - Björkman, S.. AU - Oliviero, C.. AU - Soede, N.M.. AU - Peltoniemi, O.. PY - 2016. Y1 - 2016. N2 - In mated sows, corpus luteum (CL) function is important for the establishment of the pregnancy. The maximum CL size is established at day 8 - 9 of the pregnancy and maintained autonomous until day 12. Then, CL maintenance will depend on hormones such as LH and PGF2α. PGF2α is released from the endometrium at day 14 and triggers CL regression. This regression can be prevented in pregnant sows due to estradiol production from the attaching conceptuses; which decreases endocrine PGF2α release.We hypothesized that a negative CL development between day 12 and 13 has a negative effect on the pregnancy rate in mated sows and on litter size in pregnant sows.. AB - In mated sows, corpus luteum (CL) function is important for the establishment of the pregnancy. The maximum CL size is established at day 8 ...
Transforming growth factor-alpha: identification in bovine corpus luteum by immunohistochemistry and northern blot analysis -...
Transforming growth factor-alpha: identification in bovine corpus luteum by immunohistochemistry and northern blot analysis Academic Article ...
Gentaur Molecular :Zyagen \ Bovine Corpus Luteum* cDNA \ BD-417
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Molecular determinants of a competent bovine corpus luteum: first- vs final-wave dominant follicles in: Reproduction Volume 151...
This study reports a number of key findings. Both the mass and P4-synthesising capacity of a CL formed following induced ovulation of a first-wave DF (i.e. CLs from group B in this study) were reduced relative to a CL formed following spontaneous ovulation (i.e. CLs from group A). Indeed, the P4 synthetic capacity of these induced (i.e. group B) CLs was similar to that of a regressing CL (i.e. group C) during the pro-oestrous phase of the cycle and, at a molecular level, they were characterised as having reduced expression of steroidogenic enzymes (i.e. STAR and HSD3B1) involved in cholesterol transfer into mitochondria and conversion of pregnenolone to progesterone. These induced CLs were further characterised as having reduced expression of LHCGR (required for luteal support; Niswender et al. 2007) and VEGFA (a key angiogenic regulator; Robinson et al. 2007), together with increased expression of BMP2 (linked to luteolysis in regressing CLs; Nio-Kobayashi et al. 2015).. Regarding follicular ...
KAKEN - Research Projects | Study on the mechanisms of corpus luteum disappearance during luteolysis (KAKENHI-PROJECT-25660212)
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
Estrumate
Estrumate is used as a luteolytic agent in cattle. The luteolytic action of Estrumate can be utilized to manipulate the estrous cycle to better fit certain management practices, terminal pregnancies resulting from mismatings, and to treat certain conditions associated with prolonged luteal function ...
CiNii Articles - SUGINO Norihiro
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) ...
Corpus Luteum - Anatomy & Physiology - WikiVet English
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 ...
Corpus Luteum - Anatomy & Physiology - WikiVet English
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 ...
Browse by Author - The Mathematical Institute, University of Oxford, Eprints Archive
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) ...
Cloning and characterization of a novel zinc finger protein (rZFP96) in the rat corpus luteum | ScholarBank@NUS
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 ...
Get PDF - Microarray analysis of differentially expressed microRNAs in non-regressed and regressed bovine corpus luteum tissue;...
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
Most recent papers with the keyword Pork | Read by QxMD
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 ...
Publications | Animal Sciences
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 ...
What is the corpus luteum in the ovary - Health Tips
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 Cyst Signs And Symptoms - Corpus Luteum Cyst
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 ...
Genestran 75mg/ml Solution for Injection 20ml | Genestran 20ml For Sale
Genestran 75mg/ml Solution for Injection 20ml is used to induce luteolysis in mares with functional corpus luteum. Light sweating and diarrhea
What Is A Corpus Luteum Cyst? - Blurtit
Answer (1 of 1): A corpus luteum cyst is considered to be a functional, or simple, ovarian cyst. A corpus luteum cyst may develop after an egg has been released from the follicle. Ideally after the release of an egg, the follicle will become what is called the corpus luteum. If fertilization occurs and a pregnancy results, the corpus luteum will work in providing the young embryo with progesterone until the placenta can take over later in the first trimester. However, if pregnancy does not result the corpus luteum should shrink and dissolve. In some cases the corpus luteum will continue to grow and may fill with fluid or blood. It will then be considered to be a corpus luteum cyst. A corpus luteum cyst, although usually rather small, can continue to grow, sometimes causing much pain and discomfort. If the cyst does not dissolve on its own, which is often the case, a simple laparoscopic surgery, to remove the cyst, may be suggested.
REPRODUCTIVE HORMONES AND THEIR FUNCTIONS - fabioclass
Prostaglandin F2α. Prostaglanin is a C2O fatty acid and is produced within the uterine endometrium and vesicular glands. Estradiol stimulates prostaglandin synthesis while progesterone inhibits it. The target tissue in the female is the corpus luteum, uterine myometrium and ovulatory follicles. In the female PGF2α cause luteolysis and can also cause the induction of tone and contractions within the uterus. It plays an important role in partuition in ruminants.. If a pregnancy is to remain viable then luteolysis needs to be avoided and this is achieved where concentrations of PGF2α remain below a threshold level allowing the corpus luteum to continue to secrete progesterone and thus maintain pregnancy. There are two main factors involved in the regulation of uterine secretions of PGF2α; oxytocin secretions from the corpus luteum and molecules secreted by the developing embryo that facilitate the maternal recognition of pregnancy.. Oxytocin secretion via the corpus luteum stimulates ...
Download Ovarian Follicular And Corpus Luteum Function
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Corpus Luteum Essay | AnyFreePapers.com
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.
Publications by Tweedie-Cullen, Ry Y.
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] ...
The function of progesterone, also known as the corpus luteum hormone.
What role does progesterone play in the desire to have children and in pregnancy? Why progesterone is important for the female cycle...
Anyone have a ruptured corpus luteum cyst during pregnancy | BabyandBump
This will probably be a long one but on Monday 15th I got a positive clearblue 1-2 weeks and then On Tuesday 23rd I nearly collapsed in my garden then...
Buglossidium luteum
Buglossidium luteum - Tuilleadh faoin speiceas seo: Ainmnithe tráchtála, Córais Tháirgeachta agus Trealaimh Iascaireachta, Scéimeanna cáilíochta agus luachanna cothaitheacha AE, Bearta Caomhnaithe, Caighdeáin Mhargaíochta, Dáileadh agus Gnáthóg Speicis, Tuairiscí ar Speicis, Chomhainmníocht
mannose是什么意思,【化】 甘露糖\n【医】 甘露糖翻译-生物医药大词典
中文: 经气相色谱分析PGF-为葡聚糖,PGF-、PGF- 和PGF-由葡萄糖、甘露糖和半乳糖组成,摩尔比分别为:. :.、:0. :0.和:0.:0. 8。 更详细... ...
Corpus luteum cyst - Wikipedia
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 ...
Corpus luteum hormone - definition of corpus luteum hormone by The Free Dictionary
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
AAB - Effect of two prostaglandin injections on days 5 and 6 in a timed AI protocol after estrus expression on pregnancy...
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 ...
Dairy Days 2009 pg ... by Jeffrey S. Stevenson
In Experiment 1, lactating dairy cows (n = 1,230) in 6 herds were treated with 2 injections of prostaglandin F2α(PGF2α) 14 days apart (Presynch), with the second injection administered 12 to 14 days before the onset of a timed AI protocol (Ovsynch). Cows were inseminated when detected in estrus after the Presynch PGF2αinjections. Cows not inseminated were enrolled in the Ovsynch protocol and were assigned randomly to be treated with either Estrumate or Lutalyse as part of a timed artificial insemination (AI) protocol. Blood samples were collected before treatment injection (0 hour) and 48 and 72 hours later. In cows having progesterone concentrations ≥1 ng/mL at 0 hour and potentially having a functional corpus luteum (CL) responsive to a luteolytic agent, Lutalyse increased (P | 0.05) luteal regression from 83.9 to 89.3%. Despite a significant increase in luteolysis, pregnancy rate per AI did not differ between treatments. Fertility was improved in both treatments in cows having reduced
Corpora lutea | definition of corpora lutea by Medical dictionary
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?
Induktion av persisterande gulkropp hos sto - Epsilon Archive for Student Projects
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 ...
Corpus luteum | Radiology Reference Article | Radiopaedia.org
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...
Sexual Structures - a luteal phase(presence of the corpus luteum These cyclic phases are interrupted only by pregnancy and...
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
Most recent papers in the journal Journal of Dairy Science | Read by QxMD
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 ...
Gel-filtration analysis of soluble adenylate cyclase from bovine corpus luteum | Biochemical Journal
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 ...
Intraluteal regulation of prostaglandin F2 alpha-induced prostaglandin biosynthesis in pseudopregnant rabbits | Pubblicazioni...
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 ...
Corpus Luteum Development - Embryology
MiR-29b affects the secretion of PROG and promotes the proliferation of bovine corpus luteum cells[3] The regulatory role of miRNAs has been explored in ovarian cells, and their effects on gonadal development, apoptosis, ovulation, steroid production and corpus luteum (CL) development have been revealed. In this study, we analyzed the expression of miR-29b at different stages of bovine CL development and predicted the target genes of miR-29b. We confirmed that miR-29b reduces the expression of the oxytocin receptor (OXTR), affects progesterone (PROG) secretion and regulates the function of the CL. RT-PCR showed that the expression of miR-29b was significantly higher in functional CL phases than in the regressed CL phase. Immunohistochemistry showed that OXTR was expressed in both large and small CL cells and was mainly located in the cell membrane and cytoplasm of these cells. We analyzed the expression levels of OXTR and found that transfection with a miR-29b mimic decreased OXTR expression, ...
Prostaglandins and progesterone secretion in the in vitro perfused pseudopregnant rabbit ovary - Fingerprint - Johns...
Fingerprint Dive into the research topics of Prostaglandins and progesterone secretion in the in vitro perfused pseudopregnant rabbit ovary. Together they form a unique fingerprint. ...
Cloprostenol | definition of cloprostenol by Medical dictionary
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?
dinoprost tromethamine | Semantic Scholar
A synthetic analogue of the naturally occurring prostaglandin F2 alpha. Prostaglandin F2 alpha stimulates myometrial activity, relaxes the cervix, inhibits corpus luteal steroidogenesis, and induces luteolysis by direct action on the corpus luteum. (NCI04)
Impact of angiogenic and innate immune systems on the corpus luteum function during its formation and maintenance in ruminants ...
Tytuł projektu: Udostępnianie cyfrowe zasobów polskich czasopism z nauk przyrodniczych i rolniczych w bazie AGRO. Nr umowy: POPC.02.03.01-00-0038/18-00 (okres realizacji 2018-2021). Kwota dofinansowania: 7 442 980,00 z. W ramach Programu Operacyjnego Polska Cyfrowa na lata 2014-2020, Oś Priorytetowa nr 2 E-administracja i otwarty rząd Działanie nr 2.3 Cyfrowa dostępność i użyteczność informacji sektora publicznego Poddziałanie nr 2.3.1 Cyfrowe udostępnienie informacji sektora publicznego ze źródeł administracyjnych i zasobów nauki (typ projektu: cyfrowe udostępnienie zasobów nauki) Instytucja Finansująca: Centrum Projektów Polska Cyfrowa ...
Difference between revisions of Template:Ref-AdamsHertig1969a - Embryology
Created page with Adams EC. and {{Hertig AT.}} Studies on the human corpus luteum 1. (1969) J Cell Biol. 21:397-427. [https://www.ncbi.nlm...) ...
Corpus luteum cyst
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. ...
Progesterone - Dogtime
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.
Polütsüstiliste munasarjade sündroom - Vikipeedia
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] ...
Mastodynon bels leges oldatos cseppek 50ml - Gazdagr ti Gy gyszert r - homeopatika.hu - WebPatika
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.