Käkelä R, Hyvärinen H
Department of Biology, University of Joensuu, Finland.
Comp Biochem Physiol B Biochem Mol Biol. 1995 Sep;112(1):71-81. doi: 10.1016/0305-0491(95)00058-g.
Fatty acid composition of the liver, brown fat, thigh muscle and heart of Sorex araneus and Neomys fodiens was determined by GLC and GLC-MS. In both species of shrew the total amounts of omega 3-PUFAs in the phospholipids were greater than those in the triglycerides. Sorex araneus, which feeds solely on a terrestrial diet, had a larger total amount of omega 6-PUFAs in the triglycerides of the brown fat. The phospholipids of the thigh muscle and heart of Neomys fodiens, however, contained more omega 6-PUFAs than did those of Sorex araneus. These results suggest that the fatty acid composition of the membrane phospholipids of shrews is largely genetically regulated and is affected by diet less than the composition of triglycerides. The main C16-monounsaturated fatty acid of most of the specimens studied was 16:1 omega 5, which is unusual among mammals.
通过气相色谱法（GLC）和气相色谱 - 质谱联用法（GLC - MS）测定了蜘蛛猬（Sorex araneus）和水鼩鼱（Neomys fodiens）肝脏、棕色脂肪、大腿肌肉和心脏的脂肪酸组成。在这两种鼩鼱中，磷脂中欧米伽3多不饱和脂肪酸（omega 3 - PUFAs）的总量均大于甘油三酯中的含量。仅以陆生食物为食的蜘蛛猬，其棕色脂肪甘油三酯中欧米伽6多不饱和脂肪酸（omega 6 - PUFAs）的总量更大。然而，水鼩鼱大腿肌肉和心脏的磷脂中所含的欧米伽6多不饱和脂肪酸比蜘蛛猬的更多。这些结果表明，鼩鼱膜磷脂的脂肪酸组成在很大程度上受基因调控，并且与甘油三酯的组成相比，受饮食的影响较小。大多数研究标本的主要C16 - 单不饱和脂肪酸为16:1欧米伽5，这在哺乳动物中并不常见。
