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folliculogenesis

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https://www.readbyqxmd.com/read/29132039/the-cxcl12-cxcr4-signaling-promotes-oocyte-maturation-by-regulating-cumulus-expansion-in-sheep
#1
Rui-Na Zhang, Bo Pang, Shang-Rong Xu, Peng-Cheng Wan, Song-Chang Guo, Han-Zhong Ji, Gong-Xue Jia, Lin-Yong Hu, Xin-Quan Zhao, Qi-En Yang
Gonadotropins and growth factors synergistically regulate folliculogenesis and oocyte development. C-X-C motif chemokine 12 (CXCL12) and its receptor CXCR4 are expressed in ovaries of sheep, cattle and other species, however, roles of this multifunctional signal axis in oocyte maturation are not defined. Using sheep as a model, we examined the expression patterns and functions of the CXCL12-CXCR4 axis during oocyte maturation. CXCL12 and CXCR4 mRNA and protein were present in oocytes and granulosa cells. Relative abundance of CXCR4 transcript was controlled by epidermal growth factor (EGF)...
November 4, 2017: Theriogenology
https://www.readbyqxmd.com/read/29131373/differentially-expressed-mirna-210-during-follicular-luteal-transition-regulates-pre-ovulatory-granulosa-cell-function-targeting-hras-and-efna3
#2
Astha Shukla, Sunita Dahiya, Suneel Kumar Onteru, Dheer Singh
Ovarian folliculogenesis, ovulation and luteinization are an important prerequisite for fertility performance in mammals. Spatial and temporal key factors and proteins for their regulation are well known. Recent advancement in the field of molecular biology led to the discovery of another class of gene regulators, microRNA (miRNA). Previous studies on profiling of miRNA in buffalo ovaries revealed that miRNA-210 (miR-210) is differently expressed in follicular-luteal transition. Therefore, the present study was planned to ascertain the role of miR-210 in buffalo granulosa cells...
November 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29126204/proteomic-analysis-of-germinal-vesicles-in-the-domestic-cat-model-reveals-candidate-nuclear-proteins-involved-in-oocyte-competence-acquisition
#3
P-C Lee, D E Wildt, P Comizzoli
STUDY QUESTION: Do nuclear proteins in the germinal vesicle (GV) contribute to oocyte competence acquisition during folliculogenesis? SUMMARY ANSWER: Proteomic analysis of GVs identified candidate proteins for oocyte competence acquisition, including a key RNA processing protein - heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNPA2B1). WHAT IS KNOWN ALREADY: The domestic cat GV, which is physiologically similar to the human GV, gains the intrinsic ability to resume meiosis and support early embryo development during the pre-antral-to-antral follicle transition...
November 8, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29126187/med12-regulates-ovarian-steroidogenesis-uterine-development-and-maternal-effects-in-the-mammalian-egg
#4
Xinye Wang, Priya Mittal, Carlos A Castro, Gabriel Rajkovic, Aleksandar Rajkovic
The transcriptional factor MED12 is part of the essential mediator transcriptional complex that acts as a transcriptional coactivator in all eukaryotes. Missense gain of function mutations in human MED12 are associated with uterine leiomyomas, yet the role of MED12 deficiency in tumorigenesis and reproductive biology has not been fully explored. We generated a Med12 reproductive conditional knockout mouse model to evaluate its role in uterine mesenchyme, granulosa cells, and oocytes. Mice heterozygous for Med12 deficiency in granulosa cells and uterus (Med12fl/+ Amhr2-Cre) were subfertile, while mice homozygous for Med12 deficiency in granulosa cells and uterus (Med12fl/fl Amhr2-Cre) were infertile...
November 8, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29112593/age-related-changes-in-luteal-dynamics-preliminary-associations-with-antral-follicular-dynamics-and-hormone-production-during-the-human-menstrual-cycle
#5
Angela Baerwald, Heidi Vanden Brink, Caitlin Hunter, Denae Beuker, Hyun Lim, Chel Hee Lee, Donna Chizen
OBJECTIVE: The aim of the study was to test the hypothesis that the development of luteal phase dominant follicles (LPDFs) as women age is associated with abnormal luteal function. METHODS: Luteal and antral follicle diameter were quantified in ovulatory women of midreproductive age (MRA; 18-35 y; n = 9) and advanced reproductive age (ARA; 45-55 y; n = 16) every 1 to 3 days during one complete interovulatory interval. Blood was drawn at each visit and assayed for progesterone, estradiol, inhibin A, follicle-stimulating hormone, and luteinizing hormone...
November 6, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29105397/the-impact-of-genetic-variation-and-gene-expression-level-of-the-follicle-stimulating-hormone-receptor-on-ovarian-reserve
#6
Zeinab Ghezelayagh, Mehdi Totonchi, Shabnam Zarei-Moradi, Ommolbanin Asadpour, Saman Maroufizadeh, Poopak Eftekhari-Yazdi, Hamid Gourabi, Anahita Mohseni-Meybodi
OBJECTIVES: Ovarian reserve is defined as the capacity of the ovary to provide fertile oocytes. Diminished ovarian reserve (DOR) is a disorder in which ovaries are prone to go through early menopause. Where this loss of function occurs before the age of 40, it results in the premature ovarian failure (POF) disease. Throughout folliculogenesis, the follicle-stimulating hormone receptor (FSHR) starts a signaling cascade in the granulosa cells where its inactivation leads to the arrest of follicle maturation and therefore adversely affects ovarian reserve...
January 2018: Cell Journal
https://www.readbyqxmd.com/read/29079275/endometriosis-especially-mild-disease-a-risk-factor-for-miscarriages
#7
MULTICENTER STUDY
Alexandra Sabrina Kohl Schwartz, Monika Martina Wölfler, Vera Mitter, Martina Rauchfuss, Felix Haeberlin, Markus Eberhard, Stephanie von Orelli, Bruno Imthurn, Patrick Imesch, Daniel Fink, Brigitte Leeners
OBJECTIVE: To investigate the prevalence of miscarriage in women with endometriosis (WwE) compared with disease-free control women (CW). DESIGN: Cross-sectional analysis nested in a retrospective observational study (n = 940). SETTING: Hospitals and associated private practices. PATIENT(S): Previously pregnant women (n = 268) within reproductive age in matched pairs. INTERVENTION(S): Retrospective analysis of surgical reports and self-administered questionnaires...
November 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/29077845/direct-actions-of-androgen-estrogen-and-anti-m%C3%A3-llerian-hormone-on-primate-secondary-follicle-development-in-the-absence-of-fsh-in-vitro
#8
T Baba, A Y Ting, O Tkachenko, J Xu, R L Stouffer
STUDY QUESTION: What are effects of androgen, estrogen and anti-Müllerian hormone (AMH), independent of FSH action, on the development and function of primate follicles from the preantral to small antral stage in vitro? SUMMARY ANSWER: Androgen and estrogen, but not AMH, promote follicle survival and growth in vitro, in the absence of FSH. However, their growth-promoting effects are limited to the preantral to early antral stage. WHAT IS KNOWN ALREADY: FSH supports primate preantral follicle development in vitro...
October 25, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29071578/expression-of-mir-15a-mir-145-and-mir-182-in-granulosa-lutein-cells-follicular-fluid-and-serum-of-women-with-polycystic-ovary-syndrome-pcos
#9
Mohammad Naji, Saeid Nekoonam, Ashraf Aleyasin, Ehsan Arefian, Reza Mahdian, Elham Azizi, Maryam Shabani Nashtaei, Fardin Amidi
PURPOSE: Polycystic ovary syndrome (PCOS) is one of the most common endocrinopathies that affects women in reproductive age. MicroRNAs (miRNAs) play crucial roles in normal function of female reproductive system and folliculogenesis. Deregulated expression of miRNAs in PCOS condition may be significantly implicated in the pathogenesis of PCOS. We determined relative expression of miR-15a, miR-145, and miR-182 in granulosa-lutein cells (GLCs), follicular fluid (FF), and serum of PCOS patients...
October 25, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29070766/relationship-between-the-side-of-pregnancy-and-side-of-subsequent-ovarian-activity-during-the-early-postpartum-period-in-lactating-dairy-cows
#10
Hiromi Kusaka, Hiroshi Miura, Motohiro Kikuchi, Minoru Sakaguchi
After parturition, the ovary ipsilateral to the side of previous pregnancy exhibits lower functional activity than that exhibited by the contralateral ovary. The local inhibitory effects of the corpus luteum of the previous pregnancy, and/or the presence of a previous gravid uterine horn, may induce the ipsilateral suppression of folliculogenesis. We examined the influence of the side of previous pregnancy on ovulation and folliculogenesis, until completion of the third postpartum ovulation. The ovaries of 30 Holstein cows were scanned by ultrasonography, through the three postpartum ovulation sequences...
October 26, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29070088/effect-of-turmeric-on-the-viability-ovarian-folliculogenesis-fecundity-ovarian-hormones-and-response-to-luteinizing-hormone-of-rabbits
#11
A V Sirotkin, A Kadasi, A Stochmalova, A Balazi, M Földesiová, P Makovicky, P Chrenek, A H Harrath
The present study investigated whether dietary turmeric (Curcuma longa L.) can improve rabbit reproduction, ovarian function, growth, or viability. Female New Zealand White rabbits were either fed a standard diet (n=15) or a diet enriched with 5 g (group E1) or 20 g (group E2) turmeric powder per 100 kg feed mixture (n=16 or 15, respectively). After 295 days, weight gain, conception and kindling rates, pup and mother viability, ovarian macro- and micro-morphometric indices, release of leptin in response to the addition LH, and the release of progesterone, testosterone and leptin by isolated ovarian fragments were analyzed...
October 26, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29066528/acute-nutrient-treatment-causes-alterations-in-intra-follicular-antioxidation-and-akt-signaling
#12
Haitao Nie, Yixuan Guo, Xiaolei Yao, Tiewei Ma, KaiPing Deng, Zheng Wang, Guomin Zhang, Lingwei Sun, Zi Yu Wang, HengChang Wang, Feng Wang
This study aimed to determine if short-term nutrient alteration affects 1) ovary morphology, 2) plasma and ovarian antioxidant capability, and 3) cell apoptosis and Akt signaling within the ovary. After estrus synchronization, 24 Hu sheep were assigned to three groups based on the nutrient requirement recommended for maintenance (M): 1×M (Control), 1.5×M (S), and 0.5×M (R) during day 7 to 14 of their estrous cycle. The results indicated that undernourishment significantly increased the counts and volume of follicles <2...
October 24, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29040417/neonatal-immune-activation-depletes-the-ovarian-follicle-reserve-and-alters-ovarian-acute-inflammatory-mediators-in-neonatal-rats
#13
Erin A Fuller, Luba Sominsky, Jessie M Sutherland, Kate A Redgrove, Lauren Harms, Eileen A McLaughlin, Deborah M Hodgson
Normal ovarian development is crucial for female reproductive success and longevity. Interruptions to the delicate process of initial folliculogenesis may lead to ovarian dysfunction. We have previously demonstrated that an early life immune challenge in the rat, induced by administration of lipopolysaccharide (LPS) on postnatal day (PND) 3 and 5, depletes ovarian follicle reserve long term. Here, we hypothesised that this neonatal immune challenge leads to an increase in peripheral and ovarian inflammatory signalling, contributing to an acute depletion of ovarian follicles...
October 10, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29036809/role-of-fshr-rs6165-and-esr2-rs4986938-polymorphisms-in-ovarian-stimulation-of-iranian-women-who-underwent-assisted-reproduction-treatment
#14
Maryam Kaviani, Sayyed Mohammad Hossein Ghaderian, Soheila Arefi, Mehrdad Hashemi, Sarah Sadat Aghabozorg Afjeh
BACKGROUND: Gonadotropin therapy was used to stimulate the ovary in infertile women who underwent assisted reproduction treatment (ART). Numerous studies indicated that infertile women showed different responses to gonadotropin therapy. Follicle stimulating hormone receptor (FSHR) and Oestrogen receptor (ER) polymorphisms have been reported to involve induction of folliculogenesis and ovarian response to treatment. METHODS: In the present study, two polymorphisms, namely FSHR rs6165 and ESR2 rs4986938, were investigated in 198 Iranian infertile women aged less than 39 years who underwent ART...
September 29, 2017: Human Antibodies
https://www.readbyqxmd.com/read/29029246/the-epidermal-growth-factor-network-role-in-oocyte-growth-maturation-and-developmental-competence
#15
Dulama Richani, Robert B Gilchrist
BACKGROUND: The LH surge induces great physiological changes within the preovulatory follicle, which culminate in the ovulation of a mature oocyte that is capable of supporting embryo and foetal development. However, unlike mural granulosa cells, the oocyte and its surrounding cumulus cells are not directly responsive to LH, indicating that the LH signal is mediated by secondary factors produced by the granulosa cells. The mechanisms by which the oocyte senses the ovulatory LH signal and hence prepares for ovulation has been a subject of considerable controversy for the past four decades...
September 20, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28994157/genome-wide-association-study-and-annotating-candidate-gene-networks-affecting-age-at-first-calving-in-nellore-cattle
#16
R R Mota, S E F Guimarães, M R S Fortes, B Hayes, F F Silva, L L Verardo, M J Kelly, C F de Campos, J D Guimarães, R R Wenceslau, J M Penitente-Filho, J F Garcia, S Moore
We performed a genome-wide mapping for the age at first calving (AFC) with the goal of annotating candidate genes that regulate fertility in Nellore cattle. Phenotypic data from 762 cows and 777k SNP genotypes from 2,992 bulls and cows were used. Single nucleotide polymorphism (SNP) effects based on the single-step GBLUP methodology were blocked into adjacent windows of 1 Megabase (Mb) to explain the genetic variance. SNP windows explaining more than 0.40% of the AFC genetic variance were identified on chromosomes 2, 8, 9, 14, 16 and 17...
October 9, 2017: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/28967452/current-status-of-the-role-of-endothelins-in-regulating-ovarian-follicular-function-a-review
#17
REVIEW
J M Ervin, L F Schütz, L J Spicer
Endothelins (EDN) are a group of vasoactive 21 amino acid peptides reported to play roles in steroidogenesis, folliculogenesis, and ovulation. EDN1, EDN2 and EDN3 have all been shown to affect granulosa cell (GC) function in a variety of mammalians species. Herewithin, the role of EDN in regulating steroidogenesis and ovarian follicular development is reviewed, focusing on the localization and function of EDN and their receptors in ovarian follicular function emphasizing species differences. For example, in single ovulating species such as humans and cattle, in the presence of trophic hormones such as FSH and IGF1, EDN1 and EDN2 significantly inhibited GC estradiol production in 2 of 4 studies, while no effect was observed for GC progesterone production in 2 of 4 studies...
November 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28954601/restoring-ovarian-function-with-human-placenta-derived-mesenchymal-stem-cells-in-autoimmune-induced-premature-ovarian-failure-mice-mediated-by-treg-cells-and-associated-cytokines
#18
Na Yin, Wei Zhao, Qianqian Luo, Wendan Yuan, Xiying Luan, Hongqin Zhang
Regulatory T (Treg) cells play a key role in the regulation of autoimmunity and transplantation. Human placenta-derived mesenchymal stem cell (hPMSC) transplantation has a potential to restore ovarian dysfunction associated with premature ovarian failure (POF), while the exact function of the Treg cells in the transplantation still needs to be further investigated. In this study, hPMSCs were intravenously injected into POF mice following zona pellucida glycoprotein 3 (pZP3) treatment. Ovarian function was measured by analyzing estrous cycle, folliculogenesis, and hormone secretion, also, with the detection of apoptotic granular cells (GCs) in ovarian tissues...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28945982/phosphoinositide-3-kinase-protein-kinase-b-pi3k-akt-and-janus-kinase-signal-transducer-and-activator-of-transcription-jak-stat-follicular-signalling-is-conserved-in-the-mare-ovary
#19
Sally E Hall, Rose M O Upton, Eileen A McLaughlin, Jessie M Sutherland
The mare ovary is unique in its anatomical structure; however, the signalling pathways responsible for physiological processes, such as follicular activation, remain uncharacterised. This provided us with the impetus to explore whether signalling molecules from important folliculogenesis pathways, phosphoinositide 3-kinase/protein kinase B (PI3K/AKT) and Janus kinase/signal transducer and activator of transcription (JAK/STAT), are conserved in the mare ovary. Messenger RNA expression of six genes important in follicle development was measured using quantitative polymerase chain reaction and protein localisation of key pathway members (PI3K, AKT1, phosphatase and tensin homologue (PTEN), JAK1, STAT3 and suppressor of cytokine signalling 4 (SOCS4)) was compared in tissue from fetal and adult mare ovaries...
September 26, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28944702/relationship-between-serum-anti-mullerian-hormone-and-intrafollicular-amh-levels-in-pcos-women
#20
M Stracquadanio, L Ciotta, M A Palumbo
Polycystic ovary syndrome is a complex disease characterized by various endocrine disorders that are the potential cause of anovulation and hyperandrogenism. Anti-Müllerian hormone expression is suspected to be overexpressed in PCOS granulosa cells. AMH acts as a regulator of folliculogenesis: it is produced by the granulosa cells of follicles from the stage of the primary follicle to the initial formation of the antrum. Serum and intrafollicular AMH levels are elevated in patients with PCOS due to increased number of small follicles and an increased secretion within each of these small follicles...
September 23, 2017: Gynecological Endocrinology
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