Abstract: The Mongolian gerbils’(Meriones unguiculatus) thermogenesis in summer and winter was studied. Compared with those in summer, the gerbils’resting metabolic rate and non-shivering thermogenesis, the activities of mitochondrial cytochrome C oxidase and α-glycerophosphate oxidase of BAT increased obviously. In BAT, protein content enhanced while lipid content decreased markedly in winter. However, in liver, the indexes above mentioned did not change significantly between winter and summer. In winter, serumT₃ increased prominently. It is suggested that the thermogenic function of the gerbils’ BAT exhibited seasonal fluctuation, and BAT is major thermogenic organ for the animals’ adaptation to cold.

Key words: Mongolian gerbils’(Meriones unguiculatus), BAT, Seasonal thermogenesis

摘要： 与夏季相比，冬季长爪沙鼠的静止代谢率和非颤抖性产热显著升高；褐色脂肪组织线粒体的细胞色素C-氧化酶与α-磷酸甘油氧化酶活力升高，组织总蛋白质及线粒体蛋白质含量增加，而组织的脂肪含量减少；血清T₃含量和T₃/T₄值都显著增加。但是肝脏的各项产热指标变化不显著。表明褐色脂肪组织的产热功能具有季节波动性，是长爪沙鼠适应性产热的主要来源器官。

关键词: 长爪沙鼠, 褐色脂肪组织, 季节性产热