SEASONAL-CHANGES IN PLASMA GROWTH-HORMONE AND PROLACTIN CONCENTRATIONS OF THE FROG RANA-ESCULENTA

被引：23

作者：

MOSCONI, G ^{[1
]}

YAMAMOTO, K ^{[1
]}

CARNEVALI, O ^{[1
]}

NABISSI, M ^{[1
]}

POLZONETTIMAGNI, A ^{[1
]}

KIKUYAMA, S ^{[1
]}

机构：

[1] WASEDA UNIV,SCH EDUC,DEPT BIOL,TOKYO 16950,JAPAN

来源：

GENERAL AND COMPARATIVE ENDOCRINOLOGY | 1994年 / 93卷 / 03期

关键词：

D O I：

10.1006/gcen.1994.1042

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Plasma growth hormone (GH), prolactin (PRL), and vitellogenin (VTG) concentrations were determined during the annual reproductive cycle of the frog Rana esculenta. Plasma GH and PRL were measured using a RIA that employed purified bullfrog (Rana catesbeiana) GH and PRL as standards and radioligand, and their respective antibodies. Using ELISA, plasma VTG titers were related to ovarian weight. GH, PRL, and VTG displayed different trends related to season and sex. In male frogs the GH and PRL trends have been found parallel, showing the highest concentrations (35 and 85 ng/ml, respectively) during the winter months. In the female frogs, the GH trend behaved differently from that in males; in fact, plasma GK changed during the annual reproductive cycle, showing two main peaks occurring during the reproductive period and the autumn ovarian recrudescence that are well correlated with the vitellogenesis as well as with the main changes in ovarian weight. (C) 1994 Academic Press, Inc.

引用

页码：380 / 387

页数：8

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