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Follicle primary secondary oocyte

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https://www.readbyqxmd.com/read/27890351/unilaminar-follicular-cells-transiently-express-galectin-3-during-ovarian-folliculogenesis-in-pigs
#1
Seung-Dam Heo, Changnam Park, Jeongtae Kim, Meejung Ahn, Taekyun Shin
The localization of galectin-3, a β-galactoside-binding animal lectin, was immunohistochemically studied in the ovaries of pigs to determine its expression in ovarian folliculogenesis. Various stages of ovarian follicles were identified in the ovaries of adult pigs. Galectin-3 was immunostained in the squamous follicular cells surrounding oocytes in primordial follicles and in the unilaminar granulosa cells of primary follicles, but not in oocytes of multilaminar follicles (including primary, secondary, and tertiary Graafian follicles)...
November 17, 2016: Tissue & Cell
https://www.readbyqxmd.com/read/27865446/the-use-of-utrogestan-during-controlled-ovarian-hyperstimulation-in-normally-ovulating-women-undergoing-in%C3%A2-vitro-fertilization-or-intracytoplasmic-sperm-injection-treatments-in-combination-with-a-freeze-all-strategy-a-randomized-controlled-dose-finding-study
#2
Xiuxian Zhu, Hongjuan Ye, Yonglun Fu
OBJECTIVE: To compare the clinical characteristics in a Utrogestan and hMG protocol with the use of different doses of Utrogestan in normally ovulating women undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) treatments. DESIGN: Prospective controlled study. SETTING: Tertiary-care academic medical center. PATIENT(S): A total of 150 infertile patients undergoing IVF/ICSI treatments. INTERVENTION(S): Utrogestan and hMG were administered simultaneously beginning on cycle day 3...
November 16, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27683265/spatial-characterization-of-bioenergetics-and-metabolism-of-primordial-to-preovulatory-follicles-in-whole-ex-vivo-murine-ovary
#3
Rachel Cinco, Michelle A Digman, Enrico Gratton, Ulrike Luderer
Previous work characterizing ovarian bioenergetics has defined follicular metabolism by measuring metabolic byproducts in culture media. However, culture conditions perturb the native state of the follicle, and these methods do not distinguish between metabolism occurring within oocytes or granulosa cells. We applied the phasor approach to fluorescent lifetime imaging microscopy (Phasor FLIM) at 740 nm 2-photon excitation to examine the spatial distribution of free and protein-bound nicotinamide adenine dinucleotide hydride (NADH) during primordial through preovulatory stages of follicular development in fresh ex vivo murine neonatal and gonadotropin stimulated pre-pubertal ovaries...
September 28, 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/27581083/dysregulation-of-follicle-development-in-a-mouse-model-of-premature-ovarian-insufficiency
#4
P Grasa, S Sheikh, N Krzys, K Millar, S Janjua, P Nawaggi, S A Williams
Premature ovarian insufficiency (POI) occurs in 1% of reproductive-age women. The ovarian manifestation ranges from the presence of a variable population of follicles (follicular) to the absence of follicles (afollicular), and in the majority of cases the cause is unknown. A transgenic mouse model of follicular POI, the Double Mutant (DM), arises from oocyte-specific deletion of Mgat1 and C1galt1 required for the generation of O- and N-glycans. DM females are subfertile at 6 weeks, infertile by 9 weeks and exhibit POI by 12 weeks of age...
November 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27569271/altered-state-of-primordial-follicles-in-neonatal-and-early-infantile-rats-due-to-maternal-hypothyroidism-light-and-electron-microscopy-approach
#5
Jelena Danilović Luković, Aleksandra Korać, Ivan Milošević, Tijana Lužajić, Nela Puškaš, Milica Kovačević Filipović, Anita Radovanović
Thyroid hormones (TH) are one of the key factors for normal prenatal development in mammals. Previously, we showed that subclinical maternal hypothyroidism leads to premature atresia of ovarian follicles in female rat offspring in the pre-pubertal and pubertal periods. The influence of decreased concentration of TH on primordial follicles pool formation during neonatal and early infantile period of rat pups was not investigated previously. Maternal hypothyroidism during pregnancy has irreversible negative influence on primordial follicles pool formation and population of resting oocytes in female rat offspring...
November 2016: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/27554536/effect-of-growth-differentiation-factor-9-gdf-9-on-the-progression-of-buffalo-follicles-in-vitrified-warmed-ovarian-tissues
#6
M A Abdel-Ghani, T M El-Sherry, H H Abdelhafeez
To improve the reproductive performance of water buffalo to level can satisfy our needs, the mechanisms controlling ovarian follicular growth and development should be thoroughly investigated. Therefore, in this study, the expressions of growth differentiation factor-9 (GDF-9) in buffalo ovaries were examined by immunohistochemistry, and the effects of GDF-9 treatment on follicle progression were investigated using a buffalo ovary organ culture system. Frozen-thawed buffalo ovarian follicles within slices of ovarian cortical tissue were cultured for 14 days in the presence or absence of GDF-9...
October 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27530864/di-2-ethylhexyl-phthalate-adverse-effects-on-folliculogenesis-that-cannot-be-neglected
#7
Teng Zhang, Wei Shen, Massimo De Felici, Xi-Feng Zhang
Primordial follicle formation and the subsequent transition of follicles through primary and secondary stages constitute crucial events of oogenesis. In particular, in mammals, defects in the processes that precede and accompany the formation of the primordial follicle pool can affect the size of this population significantly, while alterations in follicle activation, growth and maturation can result in premature depletion of the follicle reserve or cause follicle arrest at immature stages. Over the last decade, in vitro and in vivo approaches have been used to provide evidence that exposure to di(2-ethylhexyl)phthalate(DEHP), the most widely used plasticizer, has a deleterious effect on various stages of folliculogenesis in rodents...
October 2016: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/27428219/the-utrogestan-and-hmg-protocol-in-patients-with-polycystic-ovarian-syndrome-undergoing-controlled-ovarian-hyperstimulation-during-ivf-icsi-treatments
#8
Xiuxian Zhu, Hongjuan Ye, Yonglun Fu
Poor oocyte quality is a main concern for decreased reproductive outcomes in women with polycystic ovarian syndrome (PCOS) during controlled ovarian hyperstimulation (COH). A primary way to improve oocyte quality is to optimize the COH protocol. It was demonstrated that the viable embryo rate per oocyte retrieved in the Utrogestan and hMG protocol, a novel regimen based on frozen-thawed embryo transfer (FET), is statistically higher than that in the short protocol. Thus, a retrospective study was conducted to evaluate the endocrine characteristics and clinical outcomes in PCOS patients subjected to the Utrogestan and hMG protocol compared with those subjected to the short protocol...
July 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27418385/oogenesis-from-oogonia-to-ovulation-in-the-flagfish-jordanella-floridae-goode-and-bean-1879-teleostei-%C3%A2-cyprinodontidae
#9
Mari Carmen Uribe, Harry J Grier, Adriana García-Alarcón, Lynne R Parenti
We provide histological details of the development of oocytes in the cyprinodontid flagfish, Jordanella floridae. There are six stages of oogenesis: Oogonial proliferation, chromatin nucleolus, primary growth (previtellogenesis [PG]), secondary growth (vitellogenesis), oocyte maturation and ovulation. The ovarian lamellae are lined by a germinal epithelium composed of epithelial cells and scattered oogonia. During primary growth, the development of cortical alveoli and oil droplets, are initiated simultaneously...
October 2016: Journal of Morphology
https://www.readbyqxmd.com/read/27362486/ovarian-grafts-10-days-after-xenotransplantation-folliculogenesis-and-recovery-of-viable-oocytes
#10
Paulo Henrique Almeida Campos-Junior, Thalys Jair Melo Alves, Marco Tulio Dias, Carolina Marinho Assunçao, Michele Munk, Matheus Silvério Mattos, Lucas Rocha Kraemer, Brígida Gomes Almeida, Remo Castro Russo, Lucíola Barcelos, Luiz Sérgio Almeida Camargo, Joao Henrique Moreira Viana
Ovarian xenotransplantation is a promising alternative to preserve fertility of oncologic patients. However, several functional aspects of this procedure remained to be addressed. The aim of this study was evaluate the feasibility of xenotransplantation as a strategy to maintain bovine ovarian grafts and produce oocytes. Adult ovarian cortical pieces were xenotransplanted to the dorsal subcutaneous of female NOD-SCID mice (n = 62). Grafts were recovered ten days after xenotransplantation. Host and graft weights; folliculogenesis progression; blood perfusion, relative gene expression and number of macrophage and neutrophil of xenografts; in vitro developmental competence of graft-derived oocytes were evaluated...
2016: PloS One
https://www.readbyqxmd.com/read/27208089/bisphenol-a-induced-ovotoxicity-involves-dna-damage-induction-to-which-the-ovary-mounts-a-protective-response-indicated-by-increased-expression-of-proteins-involved-in-dna-repair-and-xenobiotic-biotransformation
#11
Shanthi Ganesan, Aileen F Keating
Bisphenol A (BPA) is an endocrine disrupting chemical with ubiquitous human exposure. BPA causes primordial follicle loss and DNA damage in germ cells, thus we hypothesized that BPA induces ovarian DNA damage, thereby precipitating follicle loss. We also anticipated that the ovary activates DNA repair and xenobiotic biotransformation to minimize oocyte damage and/or, activate cell death signaling to deplete follicles. Postnatal day 4 F344 rat ovaries were cultured in medium containing vehicle control (1% dimethylsulfoxide [DMSO]) ± BPA (440 µM) for 2-8 days...
July 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
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
#12
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/27125691/effect-of-heat-stress-on-the-survival-and-development-of-in%C3%A2-vitro-cultured-bovine-preantral-follicles-and-on-in%C3%A2-vitro-maturation-of-cumulus-oocyte-complex
#13
V M Paes, L A Vieira, H H V Correia, N A R Sa, A A A Moura, A D Sales, A P R Rodrigues, D M Magalhães-Padilha, F W Santos, G A Apgar, C C Campello, L S A Camargo, J R Figueiredo
The deleterious effect of heat stress (HS) on competence of oocytes from antral follicles is well recognized, but there is a lack of data regarding its impact on the viability and growth of preantral follicles. In this study, we used in vitro preantral follicle cultures to investigate the effects of HS on the following parameters: survival and development of primordial follicles after in vitro culture of ovarian fragments (experiment I); growth and antrum formation of isolated advanced secondary follicles (experiment II); and maturation rates after in vitro maturation (IVM) of cumulus-oocyte complexes (COCs) from antral follicles (>2-6 mm) grown in vivo (experiment III)...
September 1, 2016: Theriogenology
https://www.readbyqxmd.com/read/27112699/survival-and-growth-of-isolated-pre-antral-follicles-from-human-ovarian-medulla-tissue-during-long-term-3d-culture
#14
H Yin, S G Kristensen, H Jiang, A Rasmussen, C Yding Andersen
STUDY QUESTION: Can human pre-antral follicles isolated enzymatically from surplus medulla tissue survive and grow in vitro during long-term 3D culture? SUMMARY ANSWER: Secondary human follicles can develop to small antral follicles and remain hormonally active in an alginate-encapsulation culture system for more than 30 days. WHAT IS KNOWN ALREADY: Ovarian tissue cryopreservation followed by transplantation is a promising fertility preservation approach for cancer patients...
July 2016: Human Reproduction
https://www.readbyqxmd.com/read/27060174/risk-of-severe-ovarian-hyperstimulation-syndrome-in-gnrh-antagonist-versus-gnrh-agonist-protocol-rct-including-1050-first-ivf-icsi-cycles
#15
M Toftager, J Bogstad, T Bryndorf, K Løssl, J Roskær, T Holland, L Prætorius, A Zedeler, L Nilas, A Pinborg
STUDY QUESTION: Is the risk of severe ovarian hyperstimulation syndrome (OHSS) similar in a short GnRH antagonist and long GnRH agonist protocol in first cycle IVF/ICSI patients less than 40 years of age?. SUMMARY ANSWER: There is an increased risk of severe OHSS in the long GnRH agonist group compared with the short GnRH antagonist protocol. WHAT IS KNOWN ALREADY?: In the most recent Cochrane review, the GnRH antagonist protocol was associated with a similar live birth rate (LBR), a similar on-going pregnancy rate (OPR), and a lower incidence of OHSS (odds ratio (OR) = 0...
June 2016: Human Reproduction
https://www.readbyqxmd.com/read/27048018/experience-of-assisted-reproductive-technology-at-king-abdulaziz-university-hospital
#16
H S O Abduljabbar, S T Djamil, N N Sahly, D S Sawan, G S Ashour, A Abduljabbar
AIM: To present the authors' experience with assisted reproductive technology (ART) at King Abdulaziz University Hospital in Jeddah, Saudi Arabia. MATERIALS AND METHODS: Retrospective analysis of data collected from the charts of 264 women who were undergoing their first cycle of ART between September 2013 and March 2014. All the women were treated with gonadotropin-releasing hormone (GnRH) antagonist protocol. For all patients, the documented data included age, infertility type, cause, and hormone profile...
2016: Clinical and Experimental Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27020168/follicular-versus-luteal-phase-ovarian-stimulation-during-the-same-menstrual-cycle-duostim-in-a-reduced-ovarian-reserve-population-results-in-a-similar-euploid-blastocyst-formation-rate-new-insight-in-ovarian-reserve-exploitation
#17
Filippo Maria Ubaldi, Antonio Capalbo, Alberto Vaiarelli, Danilo Cimadomo, Silvia Colamaria, Carlo Alviggi, Elisabetta Trabucco, Roberta Venturella, Gábor Vajta, Laura Rienzi
OBJECTIVE: To compare the euploid blastocyst formation rates obtained after follicular phase (FP) versus luteal phase (LP) stimulation performed in the same menstrual cycle in a preimplantation genetic diagnosis for aneuploidy testing (PGD-A) program in patients with reduced ovarian reserve. DESIGN: Prospective paired noninferiority observational study. SETTING: Private infertility program. PATIENT(S): Forty-three reduced ovarian reserve patients undergoing a PGD-A...
June 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/26945754/morphometric-characteristics-of-preantral-and-antral-follicles-and-expression-of-factors-involved-in-folliculogenesis-in-ovaries-of-adult-baboons-papio-anubis
#18
Christiani A Amorim, Cristina Fortuño Moya, Jacques Donnez, Marie-Madeleine Dolmans
PURPOSE: Baboons are commonly utilized as an animal model for studies of human reproduction. However, folliculogenesis in this species has not been fully documented. The aim of this study was to assess follicle morphometry and expression of essential proteins involved in folliculogenesis in baboons. METHODS: Ovaries were recovered from four adult baboons and processed for histological evaluation and immunohistochemical analyses. Follicle proportion, follicle and oocyte diameter, theca layer thickness, number of granulosa cells, and follicle density were calculated...
May 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/26923665/the-importance-of-basonuclin-2-in-adult-mice-and-its-relation-to-basonuclin-1
#19
Amandine Vanhoutteghem, Brigitte Delhomme, Françoise Hervé, Isabelle Nondier, Jean-Maurice Petit, Masatake Araki, Kimi Araki, Philippe Djian
BNC2 is an extremely conserved zinc finger protein with important functions in the development of craniofacial bones and male germ cells. Because disruption of the Bnc2 gene in mice causes neonatal lethality, the function of the protein in adult animals has not been studied. Until now BNC2 was considered to have a wider tissue distribution than its paralog, BNC1, but the precise cell types expressing Bnc2 are largely unknown. We identify here the cell types containing BNC2 in the mouse and we show the unexpected presence of BNC1 in many BNC2-containing cells...
May 2016: Mechanisms of Development
https://www.readbyqxmd.com/read/26909631/oocyte-development-and-fecundity-type-of-the-brazilian-snapper-lutjanus-alexandrei-moura-lindeman-2007-perciformes-lutjanidae
#20
C A F Fernandes, P G V Oliveira, C H B Oliveira, F H V Hazin, P Travassos
Lutjanid species exhibit multiple spawning behaviour during an extended spawning season in warm months, asynchronous oocyte development and indeterminate fecundity. Although early studies have contributed to knowledge of the reproductive cycle of many species within the group, they have not considered aspects about the number of cortical alveoli oocyte stage throughout maturity phases along spawning season. The latter aspect is also considered very important to confirm indeterminate fecundity hypothesis. In the present study, were analyzed 154 Brazilian snapper Lutjanus alexandrei female gonads obtained from artisanal fisheries in Pernambuco State (Brazil) between October 2010 and March 2011...
February 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
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