关键词: 中缅树鼩, 适应性产热, 冷暴露

Abstract: The total protein contents,mitochondrial protein contents,state Ⅳ respiratory ability,respiration control ratio
(RCR),Cytochrome C oxidase activity of liver,heart,musculus diaphragma gastrocnemius and brown adipose tissue (BAT) in tree shrews (Tupaia belangeri) and serum thyroid hormone levels were measured during cold exposure (5 ± 1℃)for 1 day,7 days,14 days and 21 days. The results showed that the change of liver mitochondrial protein content was more acute than that for total protein. The mitochondrial protein content of heart and BAT were significantly increased during cold-exposure,however,the reaction of gastrocnemius was more moderate. The state IV mitochondrial respiration of these tissues increased more than did those of the control. The cytochrome C oxidase activity with cold acclimation also significantly increased for all except the gastrocnemius. Liver,gastrocnemius,BAT,heart and other organs were involved in thermoregulation during the thermal regulation process during cold-exposure. Therefore,cold-stress was an important stimulus regulator of the natural environment.

Key words: Adaptive thermogenesis, Cold-exposure, Tree shrew (Tupaia belangeri)