Temperature-induced changes in fatty acid composition of myelinated and non-myelinated axon phospholipids |
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| Authors: | K J Friedman D M Easton M Nash |
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| Affiliation: | 1. Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;2. Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China;3. Guangdong Provincial Key Laboratory of Applied Marine Biology, Guangzhou 510301, China;4. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The olfactory (non-myelinated) and trigeminal (myelinated) nerve axons of garfish show changes in phospholipid fatty acid composition when these fish are acclimated to temperatures ranging from 11 to 35 degrees C. Myelinated and non-myelinated nerve axons show similar changes in the percent saturated, percent 16-carbon, percent 18-carbon, and percent 20-carbon-and-greater unsaturated fatty acids. The observed changes in phospholipid fatty acid composition fit a linear regression model suggesting a gradual change in axonal phospholipid fatty acid composition with temperature. The temperature-induced changes in garfish nerve phospholipid fatty acid composition are consistent with the general observation of increased saturated fatty acid residues in plasma membrane phospholipids of organisms acclimated to higher environmental temperatures. The garfish data are similar to data previously obtained for goldfish tissues and Tetrahymena. |
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