Abstract
In the present study, the lipid raft composition of a canine mastocytoma cell line (C2) was analyzed. Lipid rafts were well separated from non-raft plasma membranes using a detergent-free isolation technique. To study the influence of n-3 and n-6 polyunsaturated fatty acids (PUFA) on raft fatty acid composition in comparison to non-raft cell membrane, C2 were supplemented with one of the following: α-linolenic acid, eicosapentaenoic acid, docosahexaenoic acid, linoleic acid or arachidonic acid. Enrichment of the culture medium with a specific PUFA resulted in an increase in the content of this fatty acid both in rafts and non-raft membranes. Contents of cholesterol and protein were found not to be affected by the changes in the fatty acid profiles. In conclusion, our data provide strong evidence that PUFA modulate lipid composition and physiological properties of membrane micro domains of mast cells which in turn may have effects on mast cell function.
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