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Journal of Lipid Research, Vol. 9, 570-579, September 1968
Copyright © 1968 by Lipid Research, Inc.
Department of Neurochemistry, Psychiatric Research Center, University of Gothenburg, Gothenburg, Sweden
A thin-layer chromatographic procedure for the isolation of tissue phospholipids and their subsequent analysis is described. The method has been applied to the determination of the fatty acids of phosphoglycerides in human brain from the early fetal stage to old age. The study shows changes in the distribution and fatty acid composition of each phosphoglyceride in normal brain, although they are quite small after early childhood.
A lipid-specific fatty acid pattern for each of the four major phosphoglycerides was found. Besides this, the pronounced differences between fatty acids of the lipids from the cerebral cortex and from the adjacent white matter justify speaking of a tissue-specific fatty acid pattern for brain phosphoglycerides. The phospholipids of cerebral white matter contained more monoenoic acid but much less polyunsaturated fatty acid than those of cerebral cortex. The brain phosphoglycerides also showed an age-dependent fatty acid pattern. With increasing age the concentration of the fatty acids of the linoleate family diminished while that of the linolenate family increased.
Brain inositol phosphoglycerides, the fatty acid composition of which has not been studied systematically before, were characterized by a large concentration of arachidonate which was nearly as high for white as for gray matter and showed only small changes with age.
Supplementary key words brain man cerebral cortex white matter phosphoglycerides inositol fatty acids age thin-layer chromatography
Submitted on January 2, 1968
Accepted on April 5, 1968
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