نتایج جستجو برای: follicular development

تعداد نتایج: 1436988  

Journal: :Frontiers in bioscience : a journal and virtual library 2005
Xuan Jin Chun-Sheng Han Xue-Sen Zhang Fu-Qing Yu Shu-Hua Guo Zhao-Yuan Hu Yi-Xun Liu

Stem cell factor (SCF) is essential for the development of primordial follicles. By using cultured ovaries from neonatal rats, the effect of SCF on early follicular development was investigated. Steroidogenesis is a hallmark of follicular development. Expressions of three key protein factors in steroidogenesis, SF-1, StAR, and P450arom, were investigated using immunohistochemistry and in situ h...

Journal: :Human reproduction 1997
F J Ectors P Vanderzwalmen J Van Hoeck M Nijs G Verhaegen A Delvigne R Schoysman F Leroy

The aim of this work was to evaluate the relationship between follicular size at the time of oocyte retrieval, and the subsequent oocyte competence to be fertilized and to develop in vitro. All the obtained oocytes were classified according to the corresponding volume of aspirated follicular fluid. Aspirated volume of follicular fluid <2 ml corresponded to a follicular diameter <16 mm and const...

Journal: :Development 2007
Lian Liu Singareddy Rajareddy Pradeep Reddy Chun Du Krishna Jagarlamudi Yan Shen David Gunnarsson Gunnar Selstam Karin Boman Kui Liu

In recent years, mammalian oocytes have been proposed to have important roles in the orchestration of ovarian follicular development and fertility. To determine whether intra-oocyte Foxo3a, a component of the phosphatidylinositol 3-kinase (PI3K) signaling pathway, influences follicular development and female fertility, a transgenic mouse model was generated with constitutively active Foxo3a exp...

Journal: :Reproduction 2008
Sreenivasa R Maddineni Olga M Ocón-Grove Susan M Krzysik-Walker Gilbert L Hendricks Ramesh Ramachandran

Gonadotropin-inhibitory hormone (GnIH), an RFamide peptide, has been found to inhibit pituitary LH secretion in avian and mammalian species. The gene encoding a putative receptor for GnIH (GnIHR) was recently identified in the chicken and Japanese quail brain and pituitary gland. GnIHR appears to be a seven-transmembrane protein belonging to a family of G-protein-coupled receptors. In the prese...

Background: Whenever the balance between Antioxidants and reactive oxygen species (ROS) is disrupted towards an overabundance of ROS, oxidative stress (OS) occurs. There is evidence that glutathione as an intracellular antioxidant plays an important role against ROS in female reproductive system. BSO is a selective inhibitor of glutathione peroxidas. The aim of the present study is to investiga...

Journal: :Biology of reproduction 1998
J A Lenhart B R Downey C A Bagnell

Connexin 43, a member of the highly conserved connexin family of gap junction proteins, is expressed in the pig ovary. In other species, ovarian connexin 43 expression and phosphorylation are hormonally regulated. We characterized connexin 43 expression and phosphorylation in the ovaries of mature pigs during the estrous cycle and in prepubertal gilts during follicular development induced by eC...

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