Abstract
Winter sleep of the ground squirrel Spermophilus undulatus was accompanied by a 20% decrease in phospholipid content (µg phospholipid per 1 mg protein) in microsomal fractions of the liver as compared with summer-active squirrels. The phosphatidylcholine level (mol %) in hibernating squirrels was lower than in summer-active squirrels, and the content of sphingomyelin (mol %) during the torpor bout was higher than in winter- and summer-active squirrels. The cholesterol, fatty acid, monoglyceride, and diglyceride levels in the microsomal fraction of the liver were elevated during hibernation. Pronounced seasonal changes in the lipid/protein ratio implicate the lipids of the liver microsomal fraction in adaptation of the ground squirrel to hibernation.
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Abbreviations
- EPR:
-
endoplasmic reticulum
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Original Russian Text © N.I. Perepelkina, I.K. Kolomiytseva, 2016, published in Biofizika, 2016, Vol. 61, No. 4, pp. 766–770.
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Perepelkina, N.I., Kolomiytseva, I.K. Lipids of the liver microsomal fraction in the ground squirrel Spermophilus undulatus during hibernation. BIOPHYSICS 61, 647–650 (2016). https://doi.org/10.1134/S0006350916040187
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DOI: https://doi.org/10.1134/S0006350916040187