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https://www.readbyqxmd.com/read/27866059/glucocorticoid-metabolism-in-equine-follicles-and-oocytes
#1
D Scarlet, N Ille, R Ertl, B G Alves, G D A Gastal, S O Paiva, M O Gastal, E L Gastal, C Aurich
The objective of this study was to determine whether (1) systemic and intrafollicular cortisol concentrations in horses are directly related and (2) supraphysiological levels of glucocorticoids affect in vitro maturation (IVM) rates of oocytes. Specifically, we studied the (1) changes in the intrafollicular cortisol and progesterone in context with granulosa cell gene expression during maturation of equine follicles (from 5-9 mm, 10-14 mm, 15-19 mm, 20-24 mm, and ≥25 mm in diameter) and (2) effects of cortisol supplementation on IVM rates and gene expression of equine cumulus-oocyte complexes (COCs)...
October 29, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/27862569/fibroblast-growth-factor-10-markedly-improves-in-vitro-maturation-of-porcine-cumulus-oocyte-complexes
#2
Yeo-Jin Son, Seung-Eun Lee, Hyuk Hyun, Min-Young Shin, Yun-Gwi Park, Sang-Gi Jeong, Eun-Young Kim, Se-Pill Park
Growth factors synthesized by ovarian somatic cells affect cumulus cell expansion and oocyte maturation in vitro. Fibroblast growth factor 10 (FGF10), for example, is a known regulator of mammalian cumulus-oocyte complex maturation. In this study, we investigated the effects of 0, 5, 10, 50, and 100 ng/mL FGF10 (5F, 10F, 50F, and 100F, respectively) on in vitro cumulus cell expansion, oocyte maturation, and embryo development. The percentage of fully expanded cumulus cells at the oocyte's metaphase-II (MII) stage was significantly higher in the 10F-treated group than in the control...
November 11, 2016: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/27852727/ovarian-tissue-culture-in-presence-of-vegf-and-fetuin-stimulates-follicle-growth-and-steroidogenesis
#3
Ebrahim Asadi, Atefeh Najafi, Ashraf Moeini, Reihaneh Pirjani, Gholamreza Hassanzadeh, Saideh Mikaeili, Ensieh Salehi, Emmanuel Adutwum, Mansoureh Soleimani, Fariba Khosravi, Mahmood Barati, Farid Abohassani
Ovarian tissue cryopreservation together with follicle culture provides a promising technique for fertility preservation in cancer patients. The study aimed to evaluate follicle parameters in a culture medium supplemented with VEGFA165 and/or fetuin. Vitrified-warmed ovarian cortical pieces were divided randomly into four culture groups consisting of basic culture medium (control), and the basic culture medium supplemented with VEGFA165, fetuin or both. After six days of culture, we evaluated the following: percentage of resting, primary and secondary growing follicles; survival rate; steroid hormones production; levels of reactive oxygen species, lipid peroxidation and total antioxidant capacity; and developmental and antioxidant gene expression...
November 16, 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27836978/a-homozygous-nobox-truncating-variant-causes-defective-transcriptional-activation-and-leads-to-primary-ovarian-insufficiency
#4
Lin Li, Binbin Wang, Wei Zhang, Beili Chen, Minna Luo, Jing Wang, Xi Wang, Yunxia Cao, Kehkooi Kee
STUDY QUESTION: Does a novel homozygous NOBOX truncating variant, identified in whole exome sequencing (WES) of patients with primary ovarian insufficiency (POI), cause defective transcriptional activation of multiple oocyte-related genes? SUMMARY ANSWER: A novel homozygous truncating mutation of NOBOX was confirmed to exhibit a loss-of-function effect using well-defined molecular and functional analyses. WHAT IS KNOWN ALREADY: Several NOBOX mutations have been reported to be associated with POI but all of them are heterozygous mutations...
November 11, 2016: Human Reproduction
https://www.readbyqxmd.com/read/27803898/candidate-gene-expression-in-bos-indicus-ovarian-tissues-prepubertal-and-postpubertal-heifers-in-diestrus
#5
Mayara Morena Del Cambre Amaral Weller, Marina Rufino S Fortes, Laercio R Porto-Neto, Matthew Kelly, Bronwyn Venus, Lisa Kidd, João Paulo Arcelino do Rego, Sophia Edwards, Gry B Boe-Hansen, Emily Piper, Sigrid A Lehnert, Simone Eliza Facioni Guimarães, Stephen Stewart Moore
Growth factors such as bone morphogenetic proteins 6, 7, 15, and two isoforms of transforming growth factor-beta (BMP6, BMP7, BMP15, TGFB1, and TGFB2), and insulin-like growth factor system act as local regulators of ovarian follicular development. To elucidate if these factors as well as others candidate genes, such as estrogen receptor 1 (ESR1), growth differentiation factor 9 (GDF9), follicle-stimulating hormone receptor (FSHR), luteinizing hormone receptor (LHR), bone morphogenetic protein receptor, type 2 (BMPR2), type 1 insulin-like growth factor receptor (IGFR1), and key steroidogenic enzymes cytochrome P450 aromatase and 3-β-hydroxysteroid dehydrogenase (CYP19A1 and HSD3B1) could modulate or influence diestrus on the onset of puberty in Brahman heifers, their ovarian mRNA expression was measured before and after puberty (luteal phase)...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27642754/bmp15-is-an-oocyte-produced-signal-required-for-maintenance-of-the-adult-female-sexual-phenotype-in-zebrafish
#6
Daniel B Dranow, Kevin Hu, April M Bird, S Terese Lawry, Melissa T Adams, Angelica Sanchez, James F Amatruda, Bruce W Draper
Although the zebrafish is a major model organism, how they determine sex is not well understood. In domesticated zebrafish, sex determination appears to be polygenic, being influenced by multiple genetic factors that may vary from strain to strain, and additionally can be influenced by environmental factors. However, the requirement of germ cells for female sex determination is well documented: animals that lack germ cells, or oocytes in particular, develop exclusively as males. Recently, it has been determined that oocytes are also required throughout the adult life of the animal to maintain the differentiated female state...
September 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27616216/fsh-stimulation-of-anestrous-cats-improves-oocyte-quality-and-development-of-parthenogenetic-embryos
#7
Daniel Veraguas, Paula F Gallegos, Alejandra E Velasquez, Fidel O Castro, Lleretny Rodriguez-Alvarez
In the domestic cat, the efficiency of in vitro embryo production systems is negatively affected during the nonbreeding season. The objective of this research was to evaluate the effect of FSH stimulation in anestrous cats, on quality of cumulus-oocyte complexes (COCs) and in vitro developmental competence after parthenogenetic activation. To accomplish this purpose, anestrous cats were grouped into: (1) FSH treated (serial doses of 5 mg of porcine FSH each, every 24 hours, for 4 days) and (2) untreated control...
August 13, 2016: Theriogenology
https://www.readbyqxmd.com/read/27603904/identification-of-multiple-gene-mutations-accounts-for-a-new-genetic-architecture-of-primary-ovarian-insufficiency
#8
Justine Bouilly, Isabelle Beau, Sara Barraud, Valérie Bernard, Kemal Azibi, Jérôme Fagart, Anne Fèvre, Anne Laure Todeschini, Reiner A Veitia, Chérif Beldjord, Brigitte Delemer, Catherine Dodé, Jacques Young, Nadine Binart
CONTEXT: Idiopathic primary ovarian insufficiency (POI) is a major cause of amenorrhea and infertility. POI affects 1% of women before age 40, and several genetic causes have been reported. To date, POI has been considered a monogenic disorder. OBJECTIVE: The aim of this study was to identify novel gene variations and to investigate if individuals with POI harbor mutation in multiple loci. PATIENTS AND METHODS: One hundred well-phenotyped POI patients were systematically screened for variants in 19 known POI loci (and potential candidate genes) using next-generation sequencing...
September 7, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27505353/the-hippo-mst-pathway-member-sav1-plays-a-suppressive-role-in-development-of-the-prehierarchical-follicles-in-hen-ovary
#9
Zhichao Lyu, Ning Qin, Thobela Louis Tyasi, Hongyan Zhu, Dehui Liu, Shuguo Yuan, Rifu Xu
The Hippo/MST signaling pathway is a critical player in controlling cell proliferation, self-renewal, differentiation, and apoptosis of most tissues and organs in diverse species. Previous studies have shown that Salvador homolog 1 (SAV1), a scaffolding protein which functions in the signaling system is expressed in mammalian ovaries and play a vital role in governing the follicle development. But the exact biological effects of chicken SAV1 in prehierarchical follicle development remain poorly understood. In the present study, we demonstrated that the SAV1 protein is predominantly expressed in the oocytes and undifferentiated granulosa cells in the various sized prehierarchical follicles of hen ovary, and the endogenous expression level of SAV1 mRNA appears down-regulated from the primordial follicles to the largest preovulatory follicles (F2-F1) by immunohistochemistry and real-time RT-PCR, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27488026/immature-oocytes-from-unprimed-juvenile-mice-become-a-valuable-source-for-embryo-production-when-using-c-type-natriuretic-peptide-as-essential-component-of-culture-medium
#10
Sergio Romero, Flor Sánchez, Francesca Lolicato, Heidi Van Ranst, Johan Smitz
C-type natriuretic peptide (CNP) and its receptor Natriuretic peptide receptor 2 (NPR2) play a paramount role in the maintenance of oocyte meiotic arrest in antral follicles via the regulation of the intra-oocyte levels of cyclic guanosine monophosphate and cyclic adenosine monophosphate. We investigated the potential of CNP 1) to maintain oocyte meiotic arrest during a prolonged prematuration culture, and 2) to sustain acquisition of developmental competence of immature cumulus-oocyte complexes (COCs). Compact COCs were collected from small antral follicles of pre-pubertal unprimed mice and placed in prematuration culture under different CNP-supplemented media conditions...
August 3, 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/27487501/identification-of-point-mutations-in-exon-2-of-gdf9-gene-in-kermani-sheep
#11
R Khodabakhshzadeh, M R Mohammadabadi, A K Esmailizadeh, H Moradi Shahrebabak, F Bordbar, S Ansari Namin
Screening the fertile ewes from national herds to detect the major genes for prolificacy is an effective way to create the fertile flocks. Growth differentiation factor (GDF) 9 is a member of the transforming growth factor β superfamily that is essential for folliculogenesis and female fertility. The aim of this study was to detect single nucleotide polymorphisms (SNPs) in exon 2 of GDF9 gene in Kermani sheep breed using PCR-SSCP. Genomic DNA was extracted from whole blood of collected samples using salting-out method...
2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/27379817/gonadal-agenesis-with-hypoplastic-paramesonephric-ducts-pmnds-derivatives-in-dizygotic-twins
#12
Gianmaria Miolo, Lino Del Pup, Anthony Ash, Massimo Manno, Barbara Pivetta, Giovanni Tessitori, Giuseppe Corona
: The co-occurrence of gonadal agenesis alongside hypoplastic derivatives of the paramesonephric ducts has rarely been observed. PATIENT(S): 16-year-old dizygotic twin sisters were referred to our department because of primary amenorrhea. X-ray, bone densitometry, ultrasonography, pelvic MRI and measurement of pituitary, ovary, and thyroid hormones were performed. Both twins showed hypergonadotropic hypogonadism, bilateral gonadal agenesis, fallopian tube, uterus, and vaginal hypoplasia but normal kidney and urinary tract structures and skeletal system...
July 5, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27358481/oocyte-dependent-activation-of-mtor-in-cumulus-cells-controls-the-development-and-survival-of-cumulus-oocyte-complexes
#13
Jing Guo, Lanying Shi, Xuhong Gong, Mengjie Jiang, Yaoxue Yin, Xiaoyun Zhang, Hong Yin, Hui Li, Chihiro Emori, Koji Sugiura, John J Eppig, You-Qiang Su
Communication between oocytes and their companion somatic cells promotes the healthy development of ovarian follicles, which is crucial for producing oocytes that can be fertilized and are competent to support embryogenesis. However, how oocyte-derived signaling regulates these essential processes remains largely undefined. Here, we demonstrate that oocyte-derived paracrine factors, particularly GDF9 and GDF9-BMP15 heterodimer, promote the development and survival of cumulus-cell-oocyte complexes (COCs), partly by suppressing the expression of Ddit4l, a negative regulator of MTOR, and enabling the activation of MTOR signaling in cumulus cells...
August 15, 2016: Journal of Cell Science
https://www.readbyqxmd.com/read/27301841/inhibition-of-mtor-signaling-pathway-delays-follicle-formation-in-mice
#14
Jing Zhang, Wenwen Liu, Xinhui Sun, Feifei Kong, Ye Zhu, Yue Lei, Youqiang Su, Yiping Su, Jing Li
In mammalian ovaries, follicle assembly requires proper germ cell cyst breakdown and the invasion of somatic cells to encapsulate individual oocytes. Abnormalities in this process lead to a number of pathologies such as premature ovarian failure and infertility. As a conserved pathway regulating cell growth and metabolism in response to growth factors and nutrients, the roles of mTOR signaling in follicular development have been extensively studied in recent years. However, its functions during follicle formation remain unknown...
June 15, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27298140/a-non-synonymous-mutation-in-gdf9-is-highly-associated-with-litter-size-in-cashmere-goats
#15
Jin Zhao, Shaoqing Liu, Xiaobing Zhou, Rui Zhang, Yan Li, Xiaolong Wang, Yulin Chen
No abstract text is available yet for this article.
October 2016: Animal Genetics
https://www.readbyqxmd.com/read/27197196/constitutive-activation-of-pi3k-in-oocyte-induces-ovarian-granulosa-cell-tumors
#16
So-Youn Kim, Katherine Ebbert, Marilia H Cordeiro, Megan M Romero, Kelly A Whelan, Adrian A Suarez, Teresa K Woodruff, Takeshi Kurita
Cell-cell interactions play crucial roles in the maintenance of tissue homeostasis, a loss of which often leads to varying diseases, including cancer. Here, we report that uncontrolled PI3K activity within oocytes irreversibly transforms granulosa cells (GC), causing GC tumors (GCT) through perturbed local cell communication. Previously, we reported reproductive phenotypes of transgenic mice, in which expression of constitutively active mutant PI3K was induced in primordial oocytes by Gdf9-iCre. The transgenic mice (Cre(+)) demonstrated severe ovarian phenotypes, including the overgrowth of excess ovarian follicles and anovulation...
July 1, 2016: Cancer Research
https://www.readbyqxmd.com/read/27180925/mouse-oocytes-suppress-mir-322-5p-expression-in-ovarian-granulosa-cells
#17
Jun-Ichi Sumitomo, Chihiro Emori, Yuta Matsuno, Mizuki Ueno, Kurenai Kawasaki, Takaho A Endo, Katsuyuki Shiroguchi, Wataru Fujii, Kunihiko Naito, Koji Sugiura
This study tested the hypothesis that oocyte-derived paracrine factors (ODPFs) regulate miRNA expression in mouse granulosa cells. Expression of mmu-miR-322-5p (miR-322) was higher in mural granulosa cells (MGCs) than in cumulus cells of the Graafian follicles. The expression levels of miR-322 decreased when cumulus cells or MGCs were co-cultured with oocytes denuded of their cumulus cells. Inhibition of SMAD2/3 signaling by SB431542 increased miR-322 expression by cumulus-oocyte complexes (COCs). Moreover, the cumulus cells but not the MGCs in Bmp15(-/-)/Gdf9(+/-) (double-mutant) mice exhibited higher miR-322 expression than those of wild-type mice...
August 25, 2016: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/27155601/growth-and-differentiation-factor-9-promotes-oocyte-growth-at-the-primary-but-not-the-early-secondary-stage-in-three-dimensional-follicle-culture
#18
Heidi Cook-Andersen, Kirsten J Curnow, H Irene Su, R Jeffrey Chang, Shunichi Shimasaki
PURPOSE: Factors that differentially regulate oocyte and granulosa cell growth within the early preantral follicle and how these factors differ at each stage of follicle growth remain poorly understood. The aim of this study was to isolate and evaluate the effect of recombinant growth and differentiation factor 9 (GDF9) on oocyte and granulosa cell growth at the primary and early secondary stages of preantral follicle growth during in vitro culture. METHODS: Primary stage follicles (diameters of 50-89 μm) and early secondary stage follicles (diameters of 90-120 μm) were isolated from immature mice, and individual, intact follicles were cultured in vitro in the presence and absence of recombinant GDF9...
August 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27135147/genotyping-of-novel-snps-in-bmpr1b-bmp15-and-gdf9-genes-for-association-with-prolificacy-in-seven-indian-goat-breeds
#19
Sonika Ahlawat, Rekha Sharma, Manoranjan Roy, Sanjay Mandakmale, Ved Prakash, M S Tantia
Goats form the backbone of rural livelihood and financial security systems in India but their population is showing decreasing trend. Improvement of reproductive traits such as prolificacy offers a solution to stabilize the decreasing goat population and to meet the nutritional needs of growing human population. In the present study, six novel SNPs in three candidate genes for prolificacy (BMPR1B, BMP15, and GDF9) were genotyped in seven breeds of Indian goats to evaluate their association with litter size...
2016: Animal Biotechnology
https://www.readbyqxmd.com/read/27110683/polymorphism-of-the-gdf9-gene-associated-with-litter-size-in-araucana-creole-sheep
#20
S Bravo, G Larama, E Paz, K Inostroza, H H Montaldo, N Sepúlveda
No abstract text is available yet for this article.
June 2016: Animal Genetics
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