ROLE OF THE TESTIS IN REGULATING THE DURATION OF HIBERNATION IN THE TURKISH HAMSTER, MESOCRICETUS BRANDT
ROLE OF THE TESTIS IN REGULATING THE DURATION OF HIBERNATION IN THE TURKISH HAMSTER, MESOCRICETUS BRANDT
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DOI：
10.1095/biolreprod27.4.802
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发表时间：
1982-01-01
影响因子：
3.6
通讯作者：
GOLDMAN, BD
中科院分区：
文献类型：
--
作者：
HALL, VD;BARTKE, A;GOLDMAN, BD
本文研究了去势对雄性土耳其仓鼠冬眠的影响。brandti）。在第一项研究中，动物从出生到整个冬眠期间都暴露在长日照下。通过暴露于冷（10 ℃）诱导冬眠。C）。完整的雄性通常会冬眠. apprx。6-7密苏里州然后变成了温温的在冷暴露之前被阉割的雄性继续冬眠更长的时间。存活的6只去势雄性无一在8个月时终止冬眠。这些动物中有4只存活了超过2.5年，并在这段时间内继续冬眠。在第二项研究中，在冷暴露之前，将仓鼠暴露于短日照周期以诱导睾丸退化。大部分完好的雄虫再次冬眠6-7个月。去势仓鼠冬眠8-9个月。因此，在这两项研究中，阉割延长了冬眠季节。在第二项研究中，在短日照下退化的睾丸，在冬眠的雄性中在5-7个月时复发。在最初暴露于短暂的白天之后。短日照条件下饲养但未暴露于寒冷的雄性动物显示睾丸复发的相似时程。这些动物在整个实验过程中保持体温正常。季节性睾丸周期的持续时间，由于暴露在短日照下而引起，可能受到环境温度或体温的影响很小，如果有的话。睾丸周期似乎影响冬眠，可能是通过雄激素分泌的变化。
The effect of castration on hibernation was studied in male Turkish hamsters (M. brandti). In the 1st study the animals were exposed to a long-day photoperiod from birth and throughout the period of hibernation. Hibernation was induced by exposure to cold (10.degree. C). Intact males usually hibernated for .apprx. 6-7 mo. and then became euthermic. Males which had been castrated prior to cold exposure continued to hibernate for a longer period. None of the 6 surviving castrated males terminated hibernation by 8 mo. Four of these animals survived for > 2.5 yr and continued to hibernate throughtout this time. In a 2nd study, hamsters were exposed to a short-day photoperiod to induce testicular regression prior to cold exposure. Most of the intact males again hibernated for 6-7 mo. while castrated hamsters remained in hibernation for 8-9 mo. Therefore, in both studies, castration prolonged the hibernation season. In the 2nd study, the testes, which had regressed in response to exposure to short days, underwent recrudescence in hibernating males at 5-7 mo. after the initial exposure to short days. A similar time course of testicular recrudescence was displayed by males housed under short days but not exposed to cold. These latter animals remained euthermic throughout the experiment. The duration of the seasonal testicular cycle, induced by exposure to short days, is probably affected a little, if at all, by environmental temperature or by body temperature. The testicular cycle appears to influence hibernation, probably through changes in androgen secretion.