An essential binomial for ovarian development fernando ivan floresperez cesar rosasvelasco martha c. Follicular atresia definition of follicular atresia by. Methoxychlor may cause ovarian follicular atresia and. Fotoperiodo largo inhibe regresion gonadal bairdiella. Apoptotic granulosa cells in antral follicles characterize pathway b. Follicular atresia is a normal process in the ovary figure 26. Follicular characteristics in rbc n with twowave interovulatory intervals.
Detencion del desarrollo ovarico acipenser transmontanus linarescasenave y col 2002. Follicular atresia is the breakdown of the ovarian follicles, which consist of an oocyte surrounded by granulosa cells and internal and external theca cells. Introduction throughout ovarian development and function in mammals, a highly orchestrated, periodic. We evaluated the involvement and induction of autophagy during follicular development and atresia, with a particular focus on granulosa cell apoptosis. Townson and others published ovarian follicular atresia find, read and cite all the research you need on researchgate. Stages of folliculogenesis are compared with stages of inadequate follicle growth in the dog ovary. Atresia folicular, ciclo ovarico, teleosteos viviparos, goodeidae. The differential expression of the two estrogen receptor subtypes in these distinct tissues may explain why mxc increases follicular atresia, which is thought to be an apoptotic process hughes and gorospe, 1991, whereas it increases ovarian surface epithelial height, which is thought to be either a proliferative or an antiapoptotic process. Since the development of small preantral follicles is gonadotropin independent, an increase in atresia in these follicles is typically seen with directacting cytotoxic compounds.
Pdf during the reproductive period, primary follicles are formed cyclically in the ovary of. The follicular atresia is a degenerative process observed in some oocytes that. The impaired development of the oocyte and the granulosa cell layer is judged as a separate process occurring apart from follicular atresia, which entails oocyte cell death in preantral follicles in pathway a. However, the involvement and induction of autophagy during follicular development and atresia have not been elucidated to date. Follicular atresia is a common phenomenon in vertebrate ovaries involving the oocyte and the follicular wall degeneration. Pdf methoxychlor may cause ovarian follicular atresia.
Typically around 20 follicles mature each month but only a single follicle is ovulated. Pdf ovarian follicular atresia in two teleost species. The role of autophagy in follicular development and. Ovary follicle atresia an overview sciencedirect topics. Pdf folicular atrasia rajneesh kumar sharma academia. Follicular atresia in ovaries of prochilodus lineatus. It occurs continually throughout a womans life, as she is born with millions of follicles but will only ovulate around 400 times in her lifetime. Follicle stages and follicular atresia springerlink. This will lead to an imbalance of the survival factors of the follicular cells, causing the activation of apoptotic regulatory proteins and inducing atresia in the developing follicles. Muerte celular, apoptosis, atresia folicular, regresion del cuerpo luteo. Female astyanax bimaculatus lacustris and leporinus reinhardti were kept in aquaculture cages inside tanks from february 1994 to january 1995 for the study of the characteristics of different stages of follicular atresia. Methoxychlor may cause ovarian follicular atresia and proliferation of the ovarian epithelium in the mouse. Combelles 2 1university of new hampshire, department of molecular, cellular and biomedical sciences, durham nh, 2middlebury college, department of biology, middlebury vt, usa 1.