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The effect of cold stress on ganglioside fatty acid composition and ganglioside-bound sialic acid content of rat brain subcellular fractions



The effect of cold stress on ganglioside fatty acid composition and ganglioside-bound sialic acid content of rat brain subcellular fractions



Journal of Thermal Biology 26(3): 215-222



The effect of cold stress on the ganglioside fatty acid composition and sialic acid content of brain subcellular fractions and homogenate of rats was studied, the animals were kept in a cold room with 12 h light-dark cycles at 3 and 10degreeC for 2 weeks. (1) The rat brain homogenate, synaptosomes and myelin of rats exposed to 3degreeC contained significantly higher amounts of ganglioside-bound sialic acid per mg of protein than these fractions of control rats kept at 23degreeC; the differences were less pronounced in rats exposed to 10degreeC. (2) A small, but significant, diminution of relative palmitic acid content and an increase of stearic acid content was found to take place in gangliosides from rat brain synaptosomes, synaptosomal plasma membranes and homogenate as a result of the exposure of animals to 3degreeC and to a lesser extent to 10degreeC. (3) The content of unsaturated fatty acids in gangliosides from brain subcellular fractions was approximately the same in cold exposed and control rats.

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Accession: 011493133

Download citation: RISBibTeXText

PMID: 11240228

DOI: 10.1016/s0306-4565(00)00045-0


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