期刊
ACTA HISTOCHEMICA
卷 111, 期 5, 页码 415-419出版社
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.acthis.2008.06.001
关键词
Skeletal muscle; Fiber typing; Hypoxia; Mole rats; Spalax ehrenbergi; Rats
类别
资金
- United States-Israel Binational Science Foundation (BSF) [2005346]
- Division Of Behavioral and Cognitive Sci
- Direct For Social, Behav & Economic Scie [2005346] Funding Source: National Science Foundation
Mole rats of the Spalax ehrenbergi superspecies are blind subterranean rodents that live under fluctuating oxygen supply, reduced to a measured 6% O(2), and mostly probably lower, during the rainy season. Fiber typing of muscles of the neck (trapezius) and leg (gastrocnemius, quadriceps) using standard histochemical techniques (succinic dehydrogenase, myosin ATPase) showed that the muscle fibers of mole rats in natural settings, as well as after extended captivity, were predominantly type Ila. The same muscles in laboratory rats showed the full range of fiber types. In contrast, the hearts of the mole rats and the laboratory rats were very similar. Our results indicate that skeletal muscle in the mole rats appears to have evolved in response to specific environmental demands to permit intensive endurance burrowing activities under conditions of severe or chronic hypoxia. (C) 2008 Elsevier GmbH. All rights reserved.
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