Fatty acid and long-chain base composition of gangliosides isolated from adult human brain.

Abstract:

:A series of major and minor ganglioside species were isolated from a single human adult brain and analyzed for their lipophilic composition. Hematosides, GM3 and GD3, each showing double bands on thin-layer chromatograms, were separated into the upper band and lower band fractions to be analyzed for the heterogeneity of their ceramide moieties. The upper band fractions of GM3 and GD3 were found to contain relatively high amounts of longer-chain fatty acids (C20-C26), whereas the lower band fractions contained high amounts of shorter-chain fatty acids (C16-C18). Compared to other gangliosides which contain hexosamine, the two hematosides contained a smaller proportion of stearic acid. The proportion of 4-eicosasphingenine was found to increase with increasing sialic acid content in gangliosides. These findings suggest that, in the biosynthesis of various gangliosides, N-acetylhexosamine is preferentially transferred to hematosides rich in stearic acid, and sialic acid residues are preferentially transferred to 4-eicosasphingenine-containing species.

journal_name

J Neurosci Res

authors

Ando S,Yu RK

doi

10.1002/jnr.490120208

subject

Has Abstract

pub_date

1984-01-01 00:00:00

pages

205-11

issue

2-3

eissn

0360-4012

issn

1097-4547

journal_volume

12

pub_type

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