文献类型： 外文期刊

作者： Wang, Zhengchao ¹ ; Shi, Fangxiong ² ; Jiang, Yong-qing ² ; LU, Li-zhi ³ ; Wang, Hao; Watanabe, Gen; Taya, Kazuy ¹ ;

作者机构： 1.Nanjing Agr Univ, Lab Anim Reprod, Coll Anim Sci & Technol, Nanjing 210095, Peoples R China

2.Nanjing Agr Univ, Lab Anim Reprod, Coll Anim Sci & Technol, Nanjing 210095, Peoples R China; Zhejiang Acad Agr Sci, Inst Anim Sci & Vet Med, Hangzhou 310021, Peoples R China; Tokyo Univ Agr & Technol, Dept Vet Med, Lab Vet Physiol, Tokyo 1838509, Japan; Gifu Univ, United Grad Sch Vet Sci, Dept Vet Basic Sci, Gifu 5011193, Japan

3.Nanjing Agr Univ, Lab Anim Reprod, Coll Anim Sci & Technol, Nanjing 210095, Peoples R China; Zhejiang Acad Agr Sci, Inst Anim Sci & Vet Med, Hangzhou 310021, Peoples R China; Tokyo Univ Agr & Technol, Dept Vet Med, Lab Vet Physiol, Tokyo 1838509, Japan; Gifu Univ, Unit

关键词： cyclic AMP;ovary;phosphodiesterase;rat

期刊名称：JOURNAL OF REPRODUCTION AND DEVELOPMENT （ 影响因子：2.214； 五年影响因子：2.221 ）

ISSN： 0916-8818

年卷期： 2007 年 53 卷 4 期

页码：

收录情况： SCI

摘要： Cyclic AMP (cAMP) is a second messenger that plays a critical role in follicular recruitment, development and luteinization in the mammalian ovary. The cellular level of cAMP is largely dependent on the activity of phosphodiesterase (PDE), which degrades cAMP into 5'-AMP. The present study was conducted to investigate the level of cAMP and the activity of cAMP-PDE in postnatal rats; immature rats during gonadotropin-primed follicular development, ovulation and luteinization; adult rats during normal estrous cycling; and aged rats that spontaneously developed persistent estrous (PE) by radioimmunoassay (RIA). All four rat models were confirmed by histological examination of one ovary and assayed using the other ovary by RIA. In the postnatal rats, the ovarian cAMP level was high on day 10 after birth, while ovarian cAMP-PDE activity was highest at 21 days of age. In the immature female rats, both the ovarian cAMP level and cAMP-PDE activity increased remarkably after treatment with equine chorionic gonadotropin (eCG), increased continuously 24 h after injection of human chorionic gonadotropin (hCG) for induction of ovulation and luteinization, and then declined significantly. In the adult rats during the normal estrous cycle, the ovarian cAMP levels were low on the day of estrus, and there were no significant changes in ovarian cAMP-PDE activity throughout the estrous cycle. In the PE rats, the ovarian cAMP levels were similar to those of the adult rats on the day of estrus but were lower than those on the other days of the estrous cycle; ovarian cAMP-PDE activity was lower than that in the adult rats on any day of the estrous cycle. Together, these findings indicate that the ovarian cAMP level and cAMP-PDE activity were regulated in a stage-dependent manner during ovarian follicular development, atresia and luteinization and providing evidences that cAMP and cAMP-specific PDEs are involved in these physiological processes.