Rose J, Sterner M
Department of Biological Sciences, Idaho State University, Pocatello 83209.
J Exp Zool. 1992 Jul 1;262(4):469-73. doi: 10.1002/jez.1402620416.
The role of the adrenal glands in regulating onset of winter fur growth in mink was investigated in long-term adrenalectomized animals. Bilateral adrenalectomy of adult female standard dark mink between June 23 and July 11, 1990, initiated onset of winter fur growth approximately 6 weeks earlier than controls. One month following completion of the winter fur growth in adrenalectomized mink, molting and growth of a new coat was observed. The type of pelage that grew as a result of the second growth wave was less dense than the normal summer or winter fur. However, this renewed hair growth suggests that adrenal hormones not only inhibit the onset of winter fur growth but also influence the duration of inactivity following each period of hair growth. Administration of deoxycorticosterone as a mineralocorticoid supplement had no effect on initiation of fur growth. It would appear that adrenal hormones are part of the mechanism through which photoperiod regulates fur growth in the mink. The identity of the adrenal hormones and their site of action is unknown.
在长期肾上腺切除的动物中研究了肾上腺在调节水貂冬季换毛开始中的作用。1990年6月23日至7月11日对成年雌性标准深色水貂进行双侧肾上腺切除，其冬季换毛开始时间比对照组提前约6周。肾上腺切除的水貂完成冬季换毛1个月后，观察到脱毛和新毛生长。第二次生长波长出的皮毛类型比正常夏季或冬季皮毛稀疏。然而，这种毛发的再次生长表明肾上腺激素不仅抑制冬季换毛的开始，而且影响每次毛发生长后静止期的持续时间。给予脱氧皮质酮作为盐皮质激素补充剂对换毛开始没有影响。肾上腺激素似乎是光周期调节水貂换毛机制的一部分。肾上腺激素的身份及其作用部位尚不清楚。
