Volume 16 Issue 3
May  1995
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WANG Zheng-kun, LI Qing-fen, SUN Ru-yong. The Characteristics of Nonshivering Thermogenesis and Cellular Respiration in The Tree Shrews. Zoological Research, 1995, 16(3): 239-246.
Citation: WANG Zheng-kun, LI Qing-fen, SUN Ru-yong. The Characteristics of Nonshivering Thermogenesis and Cellular Respiration in The Tree Shrews. Zoological Research, 1995, 16(3): 239-246.

The Characteristics of Nonshivering Thermogenesis and Cellular Respiration in The Tree Shrews

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 1995-08-22
  • The nonshivering thermogenesis (NST) of the tree shrew (Tupaia belangeri chinensis) was measured with Kalabukov-Skvortsov respirometer within thermal neutral zone (30℃) by a subcutanueous injection of noradrenaline at different seasons,and some biochemical characteristics of cellular respiration were measured at the same time.The maximum nonshivering thermogenesis (NST[max]) was 2.57±0.21 in winter and 2.21±0.12mlO[2]/g·h in summer,which were 75.9% and 61.2% of the value expected from NST[max]=30W[-0.45] (Heldmaier,1971),respectively,The NST[max] was.lower than that of small mammals in the temperate zone,higher than that of which in the tropics,and its seasonal variation was significant (P<0.001).The weight of brown adipose tissue (BAT) was not only different significantly between winter (0.623±0.015 g) and summer (0.532±0.08 g),but also its thermogenic activities were differntial obviously.The total and mitochondrial protein,the activity of cytochrome C oxidase and α-glycero-phosphate oxidse of BAT were obviously hiher in winter than in summer,But these biochemical indexes in the liver maintained a constant in both seasons.It was obvious that the NST[max] and the activity of BAT showed acclimatization to the seasons,which was responsible for the geographical distributions of the tree shrew,Its thermoregulatory patterns,therefore,appeared to be a transitive type from the tropic to the temperate zone.
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