Enzyme activity, hormone concentration in tree shrew (Tupaia belangeri) during cold acclimation
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2012, Vol 8, Issue 3
Abstract
Environmental factors play an important role in the seasonal adaptation of body mass and thermogenesis in wild small mammals. The tree shrew ([i]Tupaia belangeri[/i]), is a unique species of small mammals which is origin of island in the Oriental realm. The present study was to test the hypothesis that ambient temperature was a cue to induce adjustments in body mass, energy intake, metabolism, uncoupling protein 1 (UCP1) in brown adipose tissue (BAT), and other biochemical characters of[i] T. belangeri [/i]during cold exposure about 21 days. Our data demonstrate that cold acclimation induced a remarkable increase in body mass, a significant increase in energy intake and metabolic rate, and high expression of UCP1 in BAT of[i] T. belangeri[/i]. Cold acclimation induced an increase in cytochrome c oxidase (COX) and Thyroidhormones (T3/T4). These data supported that [i]T. belangeri[/i] increased the body mass and increased energy intake and expenditure under cold acclimation. Increased expression of UCP1 was potentially involved in the regulation of energy metabolism and thermogenic capacity following cold acclimation. And it through changes in enzyme activity and hormone concentration under cold acclimation, and suggested temperature changes play an important role in the regulation of thermogenic capacity in tree shrew.
Authors and Affiliations
Lin Zhang, Wanlong Zhu, Zhengkun Wang
Keywords
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