细鳞鱼卵巢滤泡细胞的发育及功能

Development and function of ovarian follicular cells in Brachymystax lenok

通过光镜和透射电镜对细鳞鱼(Brachymystax lenok)的卵巢滤泡细胞进行了研究。结果表明,滤泡细胞起源于非生殖细胞,并且其整个发育过程可分为4个时期:零散细胞期、单层扁平细胞期、多层扁平细胞期和颗粒细胞分泌期。滤泡细胞在初级卵母细胞早期并不具备任何功能,到卵母细胞卵黄积累初期,滤泡细胞上皮协同其合成部分卵膜;卵黄积累旺盛时期,滤泡细胞在此过程中起到信号介导、物质转运和储存的作用;在卵巢退化阶段,滤泡细胞与未发育的卵母细胞形成闭锁卵泡,对卵细胞残体和碎片还具有吞噬、消化等作用。

The ovarian follicular cells of Brachymystax lenok were studied by light and transmission electron microscopies. The results show that follicular cells originate from non-germ cells, and its whole development process can be divided into four stages： scattered cell stage, unilayer flat cell stage, multilayer flat cell stage and granule cell secretion stage. At early primary oocyte stages follicular cells don＇t have any function; at early yolk accumulating stages follicular cells and follicular cell endepidermis synthesize part egg envelope coordinately; at yolk-quickly-accumulating stages , follicular cells play a role in signal media, as well as material conveying and storing; at ovaries degenerating stages follicular cells and undeveloped oocytes become corpora atretica, and have the function of phagocytosing and digesting ovotid fragment. [Journal of Fishery Sciences of China, 2008, 15 （1）： 167-171]