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The Ceramide Structure of GM1 Ganglioside Differently Affects Its Recovery in Low-density Membrane Fractions Prepared from HL-60 Cells with or Without Triton-X100

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Publisher Biomed Central
Date 2008 Nov 4
PMID 18979068
Citations 1
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Abstract

Gangliosides are characteristically enriched in various membrane domains that can be isolated as low density membrane fraction insoluble in detergents (detergent-resistant membranes, DRMs) or obtained after homogenization and sonication in 0.5 M sodium carbonate (low-density membranes, LDMs). We assessed the effect of the ceramide structure of four [(3)H]-labeled GM1 ganglioside molecular species (GM1s) taken up by HL-60 cells on their occurrence in LDMs, and compared it with our previous observations for DRMs. All GM1s contained C18 sphingosine, which was acetylated in GM1(18:1/2) or acylated with C(14), C(18) or C(18:1) fatty acids (Fas).

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