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https://www.readbyqxmd.com/read/28388912/environmental-pollutants-a-possible-etiology-for-premature-ovarian-insufficiency-a-narrative-review-of-animal-and-human-data
#1
REVIEW
Pauline Vabre, Nicolas Gatimel, Jessika Moreau, Véronique Gayrard, Nicole Picard-Hagen, Jean Parinaud, Roger D Leandri
BACKGROUND: Because only 25% of cases of premature ovarian insufficiency (POI) have a known etiology, the aim of this review was to summarize the associations and mechanisms of the impact of the environment on this pathology. Eligible studies were selected from an electronic literature search from the PUBMED database from January 2000 to February 2016 and associated references in published studies. Search terms included ovary, follicle, oocyte, endocrine disruptor, environmental exposure, occupational exposure, environmental contaminant, pesticide, polyaromatic hydrocarbon, polychlorinated biphenyl PCB, phenol, bisphenol, flame retardant, phthalate, dioxin, phytoestrogen, tobacco, smoke, cigarette, cosmetic, xenobiotic...
April 7, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28360101/phospholipase-c-related-but-catalytically-inactive-proteins-regulate-ovarian-follicle-development
#2
Miho Matsuda, Masato Hirata
Phospholipase C-related but catalytically inactive proteins PRIP-1 and -2 are inositol-1,4,5-trisphosphate binding proteins that are encoded by independent genes. Ablation of the PRIP genes in mice impairs female fertility, which is manifested by fewer pregnancies, a decreased number of pups, and the decreased and increased secretion of gonadal steroids and gonadotropins, respectively. We investigated the involvement of the PRIPs in fertility, focusing on the ovaries of Prip-1 and -2 double-knockout (DKO) mice...
March 30, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28337827/prostaglandin-f2%C3%AE-induced-luteolysis-involves-activation-of-signal-transducer-and-activator-of-transcription-3-and-inhibition-of-akt-signaling-in-cattle
#3
Monique Tomazele Rovani, Gustavo Freitas Ilha, Bernardo Garziera Gasperin, Jandui Nóbrega, Dayananda Siddappa, Werner Glanzner, Alfredo Quites Antoniazzi, Vilceu Bordignon, Raj Duggavathi, Paulo Bayard Dias Gonçalves
Prostaglandin F2α (PGF) induces the precipitous loss of steroidogenic capabilities and cellular death in the corpus luteum of many species, yet the molecular mechanisms underlying this event are not completely understood. Signal transducer and activator of transcription 3 (STAT3) was activated in granulosa cells during follicle atresia, whereas AKT is immediately downregulated in the corpus luteum after PGF treatment in cattle; however, their involvement in both functional and morphological luteolysis in monovular species still need to be determined...
March 24, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28333135/bre-modulates-granulosa-cell-death-to-affect-ovarian-follicle-development-and-atresia-in-the-mouse
#4
Cheung Kwan Yeung, Guang Wang, Yao Yao, Jianxin Liang, Cheuk Yiu Tenny Chung, Manli Chuai, Kenneth Ka Ho Lee, Xuesong Yang
The BRE (brain and reproductive expression) gene, highly expressed in nervous and reproductive system organs, plays an important role in modulating DNA damage repair under stress response and pathological conditions. Folliculogenesis, a process that ovarian follicle develops into maturation, is closely associated with the interaction between somatic granulosa cell and oocyte. However, the regulatory role of BRE in follicular development remains undetermined. In this context, we found that BRE is normally expressed in the oocytes and granulosa cells from the primordial follicle stage...
March 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28324045/ring-finger-protein-6-mediates-androgen-induced-granulosa-cell-proliferation-and-follicle-growth-via-modulation-of-androgen-receptor-signaling
#5
Jung Jin Lim, Chae Young Han, Dong Ryul Lee, Benjamin K Tsang
The destiny of the ovarian follicle (growth or atresia) is tightly regulated by the actions and interactions of endocrine, paracrine, and autocrine factors. Although androgens are known to be important in the regulation of folliculogenesis, whether they facilitate or suppress follicular growth has been controversial, and the mechanisms involved are not fully understood. Moreover, the role and regulation of androgen receptor (AR) in mediating androgen signaling during follicular development is not clear. Here, we report that the active androgen dihydrotestosterone upregulates the expression of AR and its E3 ligase ring finger protein 6 (RNF6), increasing site-specific AR polyubiquitination and AR transcriptional activity for soluble Kit ligand (sKit-L) expression in preantral follicle growth...
April 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28261870/development-and-fate-of-the-postovulatory-follicle-complex-postovulatory-follicle-and-observations-on-folliculogenesis-and-oocyte-atresia-in-ovulated-common-snook-centropomus-undecimalis-bloch-1792
#6
Harry J Grier, Carole L Neidig, Irani Quagio-Grassiotto
The common snook, Centropomus undecimalis, was induced to ovulate using a time-release, GnRH analogue. Ovulation occurred the afternoon or evening the day after hormone administration. The time of ovulation was established within half an hour. At ovulation, three fish per time-group were divided into 0, 6, 12, 18 hr and one thru five days post-ovulation to study changes in the postovulatory follicle complex (POC). Histology of the ovaries revealed changes in the POC, postovulatory follicle (POF) and oocyte atresia through five days post-ovulation...
March 5, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28182010/microrna-144-is-regulated-by-cp2-and-decreases-cox-2-expression-and-pge2-production-in-mouse-ovarian-granulosa-cells
#7
Jiawei Zhou, Bin Lei, Huanan Li, Lihua Zhu, Lei Wang, Hu Tao, Shuqi Mei, Fenge Li
Mammalian folliculogenesis is a complex process in which primordial follicles develop into pre-ovulatory follicles, followed by ovulation to release mature oocytes. In this study, we explored the role of miR-144 in ovulation. miR-144 was one of the differentially expressed microRNAs, which showed 5.59-fold changes, in pre-ovulatory ovarian follicles between Large White and Chinese Taihu sows detected by Solexa deep sequencing. We demonstrated that overexpression of miR-144 significantly decreased the luciferase reporter activity under the control of the cyclooxygenase-2 (COX-2) or mothers against decapentaplegic homologue 4 (Smad4) 3'-untranslated region (3'-UTR) and suppressed COX-2 and Smad4 expression...
February 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28165147/a-review-on-the-morphology-of-ovarian-follicles-in-elasmobranchs-a-case-study-in-rhizoprionodon-taylori
#8
REVIEW
Daniela S Waltrick, Colin A Simpfendorfer, Cynthia A Awruch
The identification of the elasmobranch secondary ovarian follicles and their function can be challenging and the inconsistent use of terminology derived from other taxa is a matter of ongoing debate. In this study, the available information on the histology of the elasmobranch secondary ovarian follicles derived from atresia (preovulatory follicles) or ovulation (postovulatory follicles) is reviewed highlighting their morphology and steroidogenic capacity. Based on this literature review, the ovarian follicles of the Australian sharpnose shark Rhizoprionodon taylori were classified according to their preovulatory or postovulatory origin...
February 6, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28154111/molecular-evidence-that-follicle-development-is-accelerated-in-vitro-compared-to-in-vivo
#9
Véronique Cadoret, Cynthia Frapsauce, Peggy Jarrier, Virginie Maillard, Agnès Bonnet, Yann Locatelli, Dominique Royère, Danielle Monniaux, Fabrice Guérif, Philippe Monget
In this study we systematically compared the morphological, functional and molecular characteristics of granulosa cells and oocytes obtained by a three-dimensional in vitro model of ovine ovarian follicular growth with those of follicles recovered in vivo Preantral follicles of 200 µm diameter were recovered and cultured up to 950 µm over a 20-day period. Compared with in vivo follicles, the in vitro culture conditions maintained follicle survival, with no difference in the rate of atresia. However, the in vitro conditions induced a slight decrease in oocyte growth rate, delayed antrum formation and increased granulosa cell proliferation rate, accompanied by an increase and decrease in CCND2 and CDKN1A mRNA expression, respectively...
February 2, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28144637/induction-of-fas-mediated-apoptosis-by-interferon-%C3%AE-is-dependent-on-granulosa-cell-differentiation-and-follicular-maturation-in-the-rat-ovary
#10
Hye-Jeong Lee, Ji Young Kim, Ji Eun Park, Yong-Dal Yoon, Benjamin K Tsang, Jong-Min Kim
Fas ligand (FasL) and its receptor Fas have been implicated in granulosa cell apoptosis during follicular atresia. Although interferon-gamma (IFN-γ) is believed to be involved in the regulation Fas expression in differentiated granulosa or granulosa-luteal cells, the expression of this cytokine and its role in the regulation of the granulosa cell Fas/FasL system and apoptosis during follicular maturation have not been thoroughly investigated. In the present study, we have examined the presence of IFN-γ in ovarian follicles at different stage of development by immunohistochemistry and related their relative intensities with follicular expression of Fas and FasL, and with differences in granulosa cell sensitivity to Fas activation by exogenous agonistic Anti-Fas monoclonal antibody (Fas mAb)...
December 2016: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/28132978/positive-correlations-of-age-and-parity-with-plasma-anti-m%C3%A3-llerian-hormone-concentrations-in-japanese-black-cows
#11
Motoya Koizumi, Hiroya Kadokawa
Anti-Müllerian hormone (AMH) is secreted from the preantral and small antral follicles. It regulates follicle development and inhibits follicular atresia. This study examined how age, parity, and time after parturition affect plasma AMH concentrations in Japanese Black cows. We measured plasma AMH concentrations in primiparous, secundiparous, and multiparous (third parity or higher) cows at four time points: day 2 (day 0 = parturition), day 8, 2 days before first postpartum ovulation (pre-1stOv), and 12 days after first ovulation (post-1stOV)...
January 27, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28100484/atf6-knock-down-decreases-apoptosis-arrests-the-s-phase-of-the-cell-cycle-and-increases-steroid-hormone-production-in-mouse-granulosa-cells
#12
Yongjie Xiong, Huatao Chen, Pengfei Lin, Aihua Wang, Lei Wang, Yaping Jin
Activating transcription factor 6 (ATF6) is an important factor in the endoplasmic reticulum (ER) stress signaling pathway. The aim of this study was to assess the role of ATF6 in mouse granulosa cells with respect to apoptosis, the cell cycle, and steroid hormone production, as well as several key genes related to follicular development, via RNA interference, immunohistochemical staining, real-time quantitative polymerase chain reaction, western blotting, flow cytometry, TUNEL assay, and ELISA. Immunohistochemical staining revealed that ATF6 was extensively distributed in the granulosa cells of various ovarian follicles and oocytes in adult female mice...
January 18, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28067781/gestational-zearalenone-exposure-causes-reproductive-and-developmental-toxicity-in-pregnant-rats-and-female-offspring
#13
Xin Gao, Lvhui Sun, Niya Zhang, Chong Li, Jiacai Zhang, Zhuohui Xiao, Desheng Qi
Zearalenone (ZEN) is an oestrogenic mycotoxin commonly found in food and feed products and can affect reproduction and development in both humans and animals. This study aimed to determine the toxic effects of ZEN on maternal SD rats and the F1 female offspring. Sixty-four pregnant rats were divided into 4 groups and exposed to feed contaminated with ZEN (0, 5, 10, and 20 mg/kg feed) on gestational days (GDs) 0-21. Compared with the controls, the groups exposed to 10 and 20 mg/kg ZEN showed significantly decreased feed intake and body weight of pregnant rats and/or female offspring...
January 5, 2017: Toxins
https://www.readbyqxmd.com/read/28013214/effects-of-an-environmentally-relevant-phthalate-mixture-on-cultured-mouse-antral-follicles
#14
Changqing Zhou, Jodi A Flaws
Phthalates are used in building materials, medical devices, and personal care products. Most studies on phthalates have focused on single phthalates, but it is important to study mixtures of phthalates because humans are exposed to such mixtures daily. We tested the hypothesis that phthalate mixture exposure decreases antral follicle growth, compromises steroidogenic capacity, and induces atresia. Antral follicles from adult CD-1 mice were cultured with vehicle control or phthalate mixture (1-500 µg/ml) for 96 h...
March 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/27993358/involvement-of-matrix-metalloproteinases-and-their-inhibitors-in-bovine-cystic-ovarian-disease
#15
M B Peralta, M E Baravalle, E M Belotti, A F Stassi, N R Salvetti, H H Ortega, F Rey, M M L Velázquez
The most important regulators of tissue remodelling during ovarian follicular growth, development, ovulation and atresia are gonadotropins, steroid hormones, growth factors and different proteolytic enzymes. Matrix metalloproteinases (MMPs) such as collagenase or gelatinase (i.e. MMP-1, -8, -2 and -9) and associated tissue inhibitors of metalloproteinases (TIMP-1, -2, -3 and -4) control connective tissue remodelling during follicular rupture. In this study, we hypothesized that an imbalance in the MMP-TIMP system may be an intra-ovarian component that contributes to the pathogenesis of cystic ovarian disease (COD) in cows...
December 16, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/27940565/differentially-expressed-genes-and-gene-networks-involved-in-pig-ovarian-follicular-atresia
#16
Elena Terenina, Stephane Fabre, Agnes Bonnet, Danielle Monniaux, Christele Robert-Granie, Magali SanCristobal, Julien Sarry, Florence Vignoles, Florence Gondret, Philippe Monget, Gwenola Tosser-Klopp
Ovarian folliculogenesis corresponds to the development of follicles leading to either ovulation or degeneration, this latter process being called atresia. Even if atresia involves apoptosis, its mechanism is not well-understood. The objective of this project was to analyse global gene expression in pig granulosa cells of ovarian follicles during atresia. The transcriptome analysis was performed using 9216 cDNAs microarray to identify gene networks and candidate genes involved in pig ovarian follicular atresia...
December 9, 2016: Physiological Genomics
https://www.readbyqxmd.com/read/27901103/fsh-protects-mouse-granulosa-cells-from-oxidative-damage-by-repressing-mitophagy
#17
Ming Shen, Yi Jiang, Zhiqiang Guan, Yan Cao, Shao-Chen Sun, Honglin Liu
Oxidative stress has been implicated in triggering granulosa cell (GC) death during follicular atresia. Recent studies suggested that follicle-stimulating hormone (FSH) has a pivotal role in protecting GCs from oxidative injury, although the exact mechanism remains largely unknown. Here, we report that FSH promotes GC survival by inhibiting oxidative stress-induced mitophagy. The loss of GC viability caused by oxidative stress was significantly reduced after FSH treatment, which was correlated with impaired activation of mitophagy upon oxidative stress...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27882941/tgf-%C3%AE-signaling-controls-fshr-signaling-reduced-ovarian-granulosa-cell-apoptosis-through-the-smad4-mir-143-axis
#18
Xing Du, Lifan Zhang, Xinyu Li, Zengxiang Pan, Honglin Liu, Qifa Li
Follicle-stimulating hormone receptor (FSHR) and its intracellular signaling control mammalian follicular development and female infertility. Our previous study showed that FSHR is downregulated during follicular atresia of porcine ovaries. However, its role and regulation in follicular atresia remain unclear. Here, we showed that FSHR knockdown induced porcine granulosa cell (pGC) apoptosis and follicular atresia, and attenuated the levels of intracellular signaling molecules such as PKA, AKT and p-AKT. FSHR was identified as a target of miR-143, a microRNA that was upregulated during porcine follicular atresia...
November 24, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27821562/oxidative-stress-in-granulosa-lutein-cells-from-in-vitro-fertilization-patients
#19
Julio Ávila, Rebeca González-Fernández, Deborah Rotoli, Jairo Hernández, Angela Palumbo
Ovarian aging is associated with gradual follicular loss by atresia/apoptosis. Increased production of toxic metabolites such as reactive oxygen species (ROS) and reactive nitrogen species as well as external oxidant agents plays an important role in the process of ovarian senescence and in the pathogenesis of ovarian pathologies such as endometriosis and polycystic ovary syndrome (PCOS). This review provides a synthesis of available studies of oxidative stress (OS) in the ovary, focusing on the most recent evidence obtained in mural granulosa-lutein (GL) cells of in vitro fertilization patients...
December 2016: Reproductive Sciences
https://www.readbyqxmd.com/read/27821561/the-ovarian-renin-angiotensin-system-ovras-a-major-factor-in-ovarian-function-and-disease
#20
Angela Palumbo, Julio Ávila, Frederick Naftolin
This contribution summarizes the pivotal role of the ovarian renin-angiotensin system (OVRAS) in ovarian physiology and disease, with particular emphasis on human clinical implications and established translational applications. The presence of a complete OVRAS in all studied species has been known for decades. The OVRAS has major effects on follicle development/atresia and ovulation and steroid hormone secretion, that is, it is necessary for normal reproduction. It is well established that OVRAS activity is regulated by gonadotropins and depends on activation of proteases in the area of growing follicles...
December 2016: Reproductive Sciences
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