Folliculogenesis
Mostrando 13-24 de 29 artigos, teses e dissertações.
-
13. EXPRESSÃO DAS MAPKs EM FOLÍCULOS OVARIANOS E CORPOS LUTEOS EM DIFERENTES FASES DO CICLO ESTRAL DE BOVINOS / EXPRESSION OF MAPKs IN ovarian follicles is Lutea at different stages of estrous cycle CATTLE
Bovine estrous cycle activates the pathways of MAPKs (mitogen activated protein) via oscillation of hypothalamus-pituitary-gonad axis hormones. The objective of this work was to evaluate in vivo the frequency of expression of active (phosphorylated) form, of p-MEK 1/2 and p-ERK1/2 in all types of ovarian follicles and corpora lutea in different phases of the
Publicado em: 2009
-
14. SNPs identified and associated with oocyte pick up collected from Nelore cows / Identificação de SNPs e associação com número de oócitos colhidos por aspiração folicular em bovinos da raça Nelore
O Brasil é o país que mais realiza aspiração folicular de oócitos guiada por ultrasonografia (OPU) para fins de produção in vitro de embriões bovinos. Com isso é possível aumentar consideravelmente o número de progênies por fêmea por ano. O objetivo desse trabalho foi identificar polimorfismos em genes envolvidos na foliculogênese e associar al
Publicado em: 2008
-
15. Extracts of Azadirachta indica and Melia azedarach seeds inhibit folliculogenesis in albino rats
The seed oil of Azadirachta indica A. Juss (neem) is used in traditional medicine for its antidiabetic, spermicidal, antifertility, antibacterial, and wound healing properties. The present study was undertaken to investigate the quantitative aspects of follicular development in cyclic female albino rats (135 ± 10 g; 8 groups with 6 animals in each group) af
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-06
-
16. EXPRESSÃO DE ANEXINA II EM OÓCITOS E NO DESENVOLVIMENTO EMBRIONÁRIO BOVINO / ANNEXIN II GENE EXPRESSION IN BOVINE OOCYTES AND EMBRIONIC DEVELOPMENT
The present study as conducted to examine semiquantitative gene expression of annexin II (ANEII) during all follicular phases of folliculogenesis in bovine, in preantral follicles and oocytes of antral follicles too in different size (<3mm, 5-8mm e >9mm in diameter). It was investigated the gene expression of ANEII influenced by retinol during oocyte maturat
Publicado em: 2004
-
17. Comparative study of ovarian follicular dynamics and plasma concentrations of FSH and LH in lactating and non-lactating mares / Estudo comparativo da dinâmica folicular ovariana e concentrações plasmáticas de FSH e LH em éguas lactantes e não-lactantes
The objective of the present study was to evaluate the folliculogenesis in lactating mares and to compare the follicular dynamics and the FSH (follicle stimulating hormone) and LH (luteinizing hormone) profiles of lactating and non-lactating mares. In addition, the effects of season and body condition, as well as changes in the uterine echotexture and corpus
Publicado em: 2003
-
18. Impairing follicle-stimulating hormone (FSH) signaling in vivo: Targeted disruption of the FSH receptor leads to aberrant gametogenesis and hormonal imbalance
Pituitary gonadotropins follicle-stimulating hormone (FSH) and luteinizing hormone stimulate the gonads by regulating germ cell proliferation and differentiation. FSH receptors (FSH-Rs) are localized to testicular Sertoli cells and ovarian granulosa cells and are coupled to activation of the adenylyl cyclase and other signaling pathways. Activation of FSH-Rs
The National Academy of Sciences.
-
19. Impact of isotype-selective estrogen receptor agonists on ovarian function
Other isotype-selective estrogen receptor (ER) agonists, the selective ERα agonist 3,17-dihydroxy-19-nor-17α-pregna-1,3,5 (10)triene-21,16α-lactone and the selective ERβ agonist 8-vinylestra-1,3,5 (10)-triene-3,17β-diol, were used in hypophysectomized rats, gonadotropin-releasing hormone antagonist-treated mice, as well as intact rats to elucidate the e
National Academy of Sciences.
-
20. The spatiotemporal expression pattern of the bone morphogenetic protein family in rat ovary cell types during the estrous cycle
In the mammalian ovary, great interest in the expression and function of the bone morphogenetic protein (BMP) family has been recently generated from evidence of their critical role in determining folliculogenesis and female fertility. Despite extensive work, there is a need to understand the cellular sites of expression of these important regulatory molecul
BioMed Central.
-
21. Germ Cell-Specific Transcriptional Regulator Sohlh2 Is Essential for Early Mouse Folliculogenesis and Oocyte-Specific Gene Expression1
We previously discovered a germ cell-specific spermatogenesis and oogenesis basic helix-loop-helix transcription factor, Sohlh2. We generated Sohlh2-deficient mice to understand physiologic consequences of Sohlh2 deletion. We discovered that Sohlh2-knockout adult female mice are infertile due to lack of ovarian follicles. Sohlh2-deficient ovaries can form pr
Society for the Study of Reproduction.
-
22. Defective Epidermal Barrier in Neonatal Mice Lacking the C-Terminal Region of Connexin43D⃞V⃞
More than 97% of mice in which the C-terminal region of connexin43 (Cx43) was removed (designated as Cx43K258stop) die shortly after birth due to a defect of the epidermal barrier. The abnormal expression of Cx43K258stop protein in the uppermost layers of the epidermis seems to perturb terminal differentiation of keratinocytes. In contrast to Cx43-deficient
The American Society for Cell Biology.
-
23. Subfertility and defective folliculogenesis in female mice lacking androgen receptor
The roles of the androgen receptor (AR) in female fertility and ovarian function remain largely unknown. Here we report on the generation of female mice lacking AR (AR–/–) and the resulting influences on the reproductive system. Female AR–/– mice appear normal but show longer estrous cycles and reduced fertility. The ovaries from sexually mature AR�
National Academy of Sciences.
-
24. The type I BMP receptor BmprIB is essential for female reproductive function
Maintenance of female reproductive competence depends on the actions of several hormones and signaling factors. Recent reports suggest roles for bone morphogenetic proteins (BMPs) in early stages of folliculogenesis. A role for the type I BMP receptor BmprIB as a regulator of ovulation rates in sheep has been described recently, but little is known about the
The National Academy of Sciences.