Metabolism of triacylglycerol in developing rat brain

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Abstract
Metabolism of triacylglycerol (TAG) in developing brain has been examined. TAG is a relatively minor fraction of brain lipid in both suckling and adult rats and cannot be accounted for as entrapped blood. When glycerol tri[1-14C]oleate and [2-3H]glycerol trioleate were simultaneously injected intracerebrally into suckling rats, both labels appeared in diacylglycerol and the major phospholipids; acyl chain label was incorporated more extensively at early time points, with choline phosphoglycerides being most actively labeled. With [1-14C]fatty acids and [2-3H] glycerol administration, the specific activity of TAG was much greater than that of the more abundant phospholipids. Although direct acyl exchange between TAG and phospholipids was not demonstrated, relationships of TAG to selective mechanisms of phosphoglyceride synthesis were indicated.

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