Cellular basis for paracrine regulation of ovarian follicle development

被引:410
作者
Albertini, DF [1 ]
Combelles, CMH [1 ]
Benecchi, E [1 ]
Carabatsos, MJ [1 ]
机构
[1] Tufts Univ, Sch Med, Dept Anat & Cellular Biol, Boston, MA 02111 USA
关键词
D O I
10.1530/rep.0.1210647
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Paracrine factors secreted by oocytes and somatic cells regulate many important aspects of early ovarian follicle development in mammals. From activation of dormant primordial follicles to selection of secondary follicles, locally acting factors have been identified that appear to exert important effects on the growth and differentiation of oocytes and granulosa cells. This article summarizes evidence to support a model for bi-directional paracrine communication that is based on developmental regulation of the delivery and reception of paracrine factors at the oocyte-granulosa cell interface. Transzonal projections that originate from granulosa cells and terminate at the oocyte plasma membrane provide a polarized means to orient the secretory organelles of somatic cells. Characterization of transzonal projections in follicles from normal and genetically modified mice reveals dynamic changes in the density and stability of transzonal projections. On the basis of new data analysing the orientation and cytoskeletal content of transzonal projections in mammalian oocytes, a model is proposed for regulation of paracrine growth factor secretion by follicle-stimulating hormone. These findings have immediate implications for ovarian hyperstimulation protocols and follicle culture models as related to the production of mammalian embryos by assisted reproductive technologies.
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页码:647 / 653
页数:7
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