温度、类固醇和去势对黑线毛足鼠每日蛰伏的影响。

Effects of temperature, steroids and castration on daily torpor in the Djungarian hamster (Phodopus sungorus).

作者信息

Ouarour A, Kirsch R, Pévet P

机构信息

URA-CNRS 1332 Neurobiologie des fonctions rythmiques et saisonnières, Université L. Pasteur, Strasbourg, France.

出版信息

J Comp Physiol A. 1991 Apr;168(4):477-81. doi: 10.1007/BF00199607.

DOI:10.1007/BF00199607

Abstract

In Phodopus sungorus the frequency and characteristics of daily torpor were not affected by a decrease in temperature. The seasonal cycle of daily torpor is essentially under photoperiodic control. 2. Testicular regression is a necessary condition for daily torpor occurrence. Testosterone and 5 alpha-dihydrotestosterone administration totally inhibited daily torpor in hamsters which were exposed to short days. The temporal inhibition of torpor by steroids had no effect on the seasonal time measuring mechanism governing daily torpor. 3. Castration influenced certain aspects of the daily torpor display. Castrated hamsters showed a delay in terminating torpor season lending further support to the hypothesis that recrudescence of the testis plays a role in terminating the daily torpor season. Castration, when performed before or on the day of transfer to short photoperiod led to an increase in the frequency of torpor bouts and reduce SP exposure duration which is necessary for the daily torpor season beginning.

摘要

在黑线毛足鼠中，每日蛰伏的频率和特征不受温度降低的影响。每日蛰伏的季节性周期主要受光周期控制。2. 睾丸退化是每日蛰伏发生的必要条件。给予睾酮和5α-二氢睾酮可完全抑制暴露于短日照下的仓鼠的每日蛰伏。类固醇对蛰伏的暂时抑制对控制每日蛰伏的季节性计时机制没有影响。3. 去势影响每日蛰伏表现的某些方面。去势仓鼠在结束蛰伏季节时出现延迟，这进一步支持了睾丸再发育在结束每日蛰伏季节中起作用的假说。在转移到短光周期之前或当天进行去势，会导致蛰伏发作频率增加，并缩短每日蛰伏季节开始所需的静止期暴露持续时间。