Adaptive character of metabolism in Eothenomys miletus in Hengduan Mountains region during cold acclimation |
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Authors: | Wan-long Zhu Jin-hong CaiXiao Lian Zheng-kun Wang |
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Institution: | School of Life Science of Yunnan Normal University, Engineering Research Center of Sustainable Development and Utilization of Biomass Energy Ministry of Education, The Key Laboratory of Biomass Energy and Environmental Biotechnology in Yunnan Province, Kunming 650092, China |
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Abstract: | Environmental factors play an important role in the seasonal adaptation of body mass and thermogenesis in small, wild mammals. The purpose of the present study was to test the hypothesis that ambient temperature was a cue to trigger the seasonal adjustments in body mass, energy intake, uncoupling protein 1 (UCP1) in brown adipose tissue (BAT), and other biochemical characteristics of Eothenomys miletus during 49 days of cold exposure. Our data demonstrated that cold acclimation induced a remarkable decrease in body mass, a significant increase in energy intake and metabolic rate, and high expression of UCP1 in BAT of E. miletus. Biochemical characteristics of BAT and liver respiration were also increased following cold acclimation. These data suggest that E. miletus reduced 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. |
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Keywords: | Eothenomys miletus Energy metabolism Uncoupling protein 1(UCP1) |
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