Primordial Follicles
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Intrafollicular barriers and cellular interactions during ovarian follicle development
Abstract Follicles are composed of different interdependent cell types including oocytes, cumulus, granulosa, and theca cells. Follicular cells and oocytes exchange signaling molecules from the beginning of the development of the primordial follicles until the moment of ovulation. The follicular structure transforms during folliculogenesis; barriers form bet
Anim. Reprod.. Publicado em: 28/11/2019
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2. Powdered coconut water (ACP 406®) as an alternative base culture medium for in vitro culture of goat preantral follicles enclosed in ovarian tissue
Abstract This study evaluated a powdered coconut water solution (ACP 406®) as a base culture medium on the in vitro survival and development of in situ goat preantral follicles. The ovarian fragments were either immediately fixed in Carnoy solution (non-cultured control) or individually cultured for 2 or 6 days. The following culture media (all containing 1
Anim. Reprod.. Publicado em: 25/11/2019
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3. Morfometria e população de folículos pré-antrais de vacas Nelore vazias, gestantes e de fetos nos terços inicial, médio e final da gestação
ABSTRACT The aim of this study was to describe population and morphological characteristics of preantral follicles of not pregnant cows, pregnant cows and fetus. Ten ovaries of non-pregnant Nelore cows, eighteen ovaries of pregnant cows and eighteen ovaries of fetus were used. For pregnant cows, six ovaries from each third (initial, middle and final) were ev
Arq. Bras. Med. Vet. Zootec.. Publicado em: 28/10/2019
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4. DNA damage and primordial follicle activation after in vitro culture of sheep ovarian cortex in Morus nigra leaf extract
RESUMO: Este estudo avaliou o efeito do extrato das folhas de Morus nigra, com ou sem suplementos, sobre a morfologia, a ativação e o dano ao DNA de folículos pré-antrais cultivados inclusos em tecido ovariano. Os ovários foram coletados e divididos em fragmentos, sendo um fixado para análise histológica e ensaio de marcação de terminações dUTP me
Pesq. Vet. Bras.. Publicado em: 2019-01
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5. Anethole reduces oxidative stress and improves in vitro survival and activation of primordial follicles
Primordial follicles, the main source of oocytes in the ovary, are essential for the maintenance of fertility throughout the reproductive lifespan. To the best of our knowledge, there are no reports describing the effect of anethole on this important ovarian follicle population. The aim of the study was to investigate the effect of different anethole concent
Braz J Med Biol Res. Publicado em: 28/05/2018
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6. GOSSYPOL PROMOTES THE DEGENERATION OF CHICKEN OVARIAN FOLLICLES IN VITRO
ABSTRACT Gossypol, a phenolic compound produced by the pigment glands of cotton, is known to affect male reproduction. In females, exposure to gossypol has been associated with interference with the estrous cycle and embryo development. In laying hens fed cottonseed, gossypol was found to reduce egg production and weight and to cause discoloration of the egg
Rev. Bras. Cienc. Avic.. Publicado em: 2016-09
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7. Histological study of rat ovaries cryopreserved by vitrification or slow freezing and reimplanted in the early or late postmenopausal stage
PURPOSE: To compare two rat ovary cryopreservation techniques (vitrification vs. slow freezing) and two postmenopausal stages (early vs. late) with regard to graft take.METHODS:Thirty-three Wistar rats were submitted to bilateral oophorectomy. One ovary was submitted to histological analysis while the other was cryopreserved by slow freezing or vitrification
Acta Cir. Bras.. Publicado em: 2014-05
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8. N-acetylcysteine improves morphologic and functional aspects of ovarian grafts in rats
PURPOSE: To evaluate morphological and functional aspects of the ovarian graft in transplanted rats treated with NAC. METHODS: Female Wistar rats, virgin, 3 to 4 months old, weighing 200-250 grams were used in experiments. The rats have been kept in proper sanitary conditions, receiving food and water ad libitum. Five groups (n=10, each) were constituted: 4
Acta Cir. Bras.. Publicado em: 2014
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9. EFEITO DA ASSOCIAÇÃO DO FATOR DE CRESCIMENTO E DIFERENCIAÇÃO 9 (GDF-9) E DO HORMÔNIO FOLÍCULO ESTIMULANTE (FSH) SOBRE O DESENVOLVIMENTO IN VITRO DE FOLÍCULOS PRÉ-ANTRAIS CAPRINOS EM CULTIVO IN SITU DE LONGA DURAÇÃO / EFFECT OF ASSOCIATION AND GROWTH FACTOR DIFFERENTIATION 9 (GDF-9) and hormone FOLLICLE STIMULATING (FSH) DEVELOPMENT OF IN VITRO PREANTRAL FOLLICLES GOATS IN FARMING IN SITU LONG
The aim of this study was to evaluate the effects of growth differentiation factor 9 (GDF-9) and follicle-stimulating hormone (FSH) on the in vitro survival, growth and steroidogenesis of caprine preantral follicles cultured for 16 days. Ovarian fragments were cultured in αMEM+ in the presence or absence of GDF-9 (200 ng/mL) and/or FSH (50 ng/mL) added
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2012
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10. Cultivo in vitro de folículos pré-antrais caprinos utilizando angiotensina II (ANG II), fator de crescimento do endotélio vascular (VEGF) e peptídeo intestinal vasoativo (VIP). / In vitro culture of goat preantral follicles using angiotensin II (Ang II), endothelial growth factor (VEGF) and vasoactive intestinal peptide (VIP).
Os objetivos do presente estudo foram avaliar o efeito de diferentes concentrações da angiotensina II (ANG II), fator de crescimento do endotélio vascular (VEGF) e peptídeo intestinal vasoativo (VIP) no desenvolvimento in vitro de folículos pré-antrais caprinos e verificar a localização do receptor 2 do VEGF (VEGFR-2) e a expressão dos receptores da
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2010
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11. Estabilidade de genes de referÃncia e influÃncia das BMPs-6 e 7 sobre o desenvolvimento in vitro de folÃculos prÃ-antrais caprinos / Stability of reference genes and influence of BMP-6 and 7 on the in vitro development of caprine preantral follicles
Este trabalho tem como objetivo avaliar a estabilidade de genes de referÃncia e a expressÃo de fatores de crescimento e de receptores de hormÃnios em folÃculos secundÃrios de caprinos. AlÃm disso, visa quantificar a expressÃo dos RNA mensageiros para BMP-6 e BMP-7 em folÃculos prÃ-antrais e antrais caprinos e avaliar os efeitos de FSH, BMP-6 e BMP-7
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
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12. Interaction between growth differentiation factor 9, insulin-like growth factor I and growth hormone on the in vitro development and survival of goat preantral follicles
The objective of this study was to determine the effects of GDF-9, IGF-I, and GH alone or combined on preantral follicle survival, activation and development after 1 and 7 days of in vitro culture. Either fresh (non-cultured) or cultured ovarian tissue was processed for histological and fluorescence analysis. For all media tested, the percent of normal folli
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-08