Maturation Oocyte
Mostrando 1-12 de 252 artigos, teses e dissertações.
-
1. ADAMTS proteoglycanases downregulation with impaired oocyte quality in PCOS
ABSTRACT Objective: A disintegrin and metalloproteinase with thrombospondin motifs 4 (ADAMTS-4) and ADAMTS-5 normal expression levels are essential for ovulation and subsequent fertilization. The objective of the present study was to assess expression pattern of these genes in cumulus cells (CCs) taken from patients with polycystic ovary syndrome (PCOS) and
Arch. Endocrinol. Metab.. Publicado em: 2021-02
-
2. INFLUÊNCIA DO HEPES NA MATURAÇÃO IN VITRO DE OÓCITOS CANINOS OBTIDOS DE CADELAS EM DIESTRO E ANESTRO
Resumo Diferentemente de outras espécies domésticas, a maturação in vitro (MIV) de oócitos caninos apresenta sucesso limitado. O objetivo deste estudo foi avaliar o efeito do HEPES na maturação in vitro de oócitos caninos obtidos de cadelas em diestro e anestro. Os ovários foram coletados, isolados assepticamente e transportados refrigerados a uma t
Ciênc. anim. bras.. Publicado em: 13/12/2019
-
3. Validation of reference genes for gene expression studies in bovine oocytes and cumulus cells derived from in vitro maturation
Abstract Quantitative real-time PCR (qPCR) is a valuable tool for gene expression studies and it is necessary to choose an ideal endogenous reference gene for data normalization. This work studied a set of reference genes in oocytes and cumulus cells of COCs (Cumulus-Oocyte Complexes) that are suitable for relative gene expression analyses after in vitro mat
Anim. Reprod.. Publicado em: 25/11/2019
-
4. Supplemented powdered coconut water (ACP-406®) promotes growth of goat secondary follicles and oocyte meiotic resumption
Abstract The objective of this study was to test the efficiency of powdered coconut water (ACP-406®) base-medium without or with the addition of supplements on in vitro culture of isolated goat secondary follicles. Follicles were cultured for 18 days in α-MEM or in ACP-406®, both without supplements (referred to as α-MEM and ACP, respectively), or both s
Anim. Reprod.. Publicado em: 25/11/2019
-
5. In vitro embryo production in buffaloes: from the laboratory to the farm
Abstract Transvaginal follicular aspiration technique together with in vitro embryo production are the biotechnological alternatives currently available to support genetic improvement breeding programs in buffalo species. However, aspects related to animal management, lack of knowledge of the metabolic needs and biochemical peculiarities of gametes and embry
Anim. Reprod.. Publicado em: 25/11/2019
-
6. Ovarian development and spawning of Macrobrachium amazonicum (Crustacea, Decapoda)
RESUMO Das espécies nativas de camarões da América do Sul, Macrobrachium amazonicum (Heller, 1862) é a mais importante para fins de aquicultura, possuindo elevado valor comercial. Devido à sua importância, este estudo objetivou avaliar a plasticidade fenotípica de fêmeas da espécie em relação ao desenvolvimento gonadal, e determinar o tipo de deso
Iheringia, Sér. Zool.. Publicado em: 15/07/2019
-
7. Gonadal development and fecundity of the smooth weakfish Cynoscion leiarchus (Teleostei: Perciformes: Sciaenidae) in a tropical Brazilian bay
ABSTRACT Cynoscion leiarchus (Cuvier, 1830) is a coastal fish species that is widely distributed along the Western Atlantic coast, from Belize to Southern Brazil. In Brazil, C. leiarchus It is an important resource for commercial and artisanal fisheries. Our objective was to describe the oogenesis and spermatogenesis stages of the species and to estimate bat
Zoologia (Curitiba). Publicado em: 24/11/2016
-
8. Effect of Fibroblast Growth Factor 2 (FGF2) and Insulin Transferrin Selenium (ITS) on In Vitro Maturation, Fertilization and Embryo Development in Sheep
The present study evaluated the effect of fibroblast growth factor 2 (FGF2) and insulin-transferrin-selenium (ITS) to the in vitro maturation and embryo culture media on ovine oocyte maturation, cleavage and embryo development. Oocytes having more than five layers of unexpanded cumulus cells and granular homogenous ooplasm were cultured into 50 μL droplets
Braz. arch. biol. technol.. Publicado em: 2015-08
-
9. Gross morphology and ultrastructure of the female reproductive system of Diaphorina citri (Hemiptera: Liviidae)
The morphological traits of the female reproductive system of Diaphorina citri were examined in detail. Diaphorina citri has telotrophic ovaries with ovarioles organized as a "bouquet", displaying a rudimentary terminal filament and a syncytial tropharium. The vitellarium carries a single growing oocyte at each maturation cycle, which is connected with the t
Zoologia (Curitiba). Publicado em: 2014-04
-
10. Oocyte development and ovarian maturation of the black triggerfish, Melichthys niger(Actinopterygii: Balistidae) in São Pedro e São Paulo Archipelago, Brazil
A oogênese é um estágio chave no desenvolvimento reprodutivo de um organismo, o qual pode ser melhor compreendido a partir de análises histológicas dos ovários em diferentes estágios de maturidade. A fim de fornecer informações sobre a biologia reprodutiva do cangulo-preto, M. niger, em especial sobre o seu processo de oogênese, este estudo teve co
Neotrop. ichthyol.. Publicado em: 2013-09
-
11. Effects of green tea polyphenols, insulin-like growth factor I and glucose on developmental competence of bovine oocytes
The present study examined the effects of green tea polyphenols (GTP), insulin-like growth factor-I (IGF-I) and glucose on oocyte in vitro maturation, subsequent embryo development and blastocyst quality in bovine. Cumulus-oocyte complexes (COC) were aspirated from the ovaries and cultured in synthetic oviduct fluid supplemented with MEM amino acids (SOFaa)
R. Bras. Zootec.. Publicado em: 2012-12
-
12. O óxido nítrico e os nucleotídeos cíclicos em oócitos bovinos maturados in vitro / Nitric oxide and cyclic nucleotides in bovine oocytes matured in vitro
O óxido nítrico (NO) é um mensageiro químico gerado pela atividade da enzima óxido nítrico sintase (NOS) a qual foi detectada em vários órgãos incluído o sistema reprodutor. O sistema NOS/NO parece desempenhar papel importante na maturação oocitária entre outras funções. No entanto, apesar das evidências, há poucos estudos sobre o papel dess
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011