CIRCADIAN AND SEASONAL RHYTHMS OF MELATONIN PRODUCTION IN MULES (EQUUS-ASINUS X EQUUS-CABALLUS)
CIRCADIAN AND SEASONAL RHYTHMS OF MELATONIN PRODUCTION IN MULES (EQUUS-ASINUS X EQUUS-CABALLUS)
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DOI：
10.1111/j.1600-079x.1991.tb00829.x
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发表时间：
1991-04-01
影响因子：
10.3
通讯作者：
REITER, RJ
中科院分区：
文献类型：
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作者：
COZZI, B;MOREI, G;REITER, RJ
本研究描述的模式褪黑激素的生产在骡子（马asinus ×马caballus）。 在春季和秋季，每小时采集8头骡的血液，持续24 h。 所获得的数据显示存在的昼夜节律的生产褪黑激素，在黑暗的阶段，在春季和秋季的最高值。 在秋季，褪黑激素产生的夜间上升在黑暗阶段开始得更早，并达到比春季更高的数量水平。 上午褪黑激素的下降在两个季节是相似的。 骡子夜间褪黑激素产生的最大水平比马高出约10倍。 这里报告的结果表明，能够接收和处理环境信号的大脑结构在骡子（一种遗传不育的哺乳动物杂交种）中的持久性。
The present study describes the patterns of melatonin production in the mule (Equus asinus X Equus caballus). Blood was sampled hourly for 24 h from eight mule mares in spring and fall. The data obtained show the presence of a circadian rhythm of production of melatonin, with highest values during the dark phase both in spring and fall. In fall the nightly rise of melatonin production begins earlier in the dark phase and reaches higher quantitative levels than in spring. The morning decline of melatonin production is similar in the two seasons. Maximal levels of nightly melatonin production in the mule are about 10X higher than those described in the horse. The results reported here indicate the persistence of brain structures able to receive and transduce environmental signals in the mule, a genetically sterile mammalian hybrid.