Preparation of fatty acid methyl esters from lipoprotein and macrophage lipid subclasses on thin-layer plates

被引：32

作者：

Sattler, W ^{[1
]}

Reicher, H ^{[1
]}

Ramos, P ^{[1
]}

Panzenboeck, U ^{[1
]}

Hayn, M ^{[1
]}

Esterbauer, H ^{[1
]}

Malle, E ^{[1
]}

Kostner, GM ^{[1
]}

机构：

[1] GRAZ UNIV, DEPT BIOCHEM, A-8010 GRAZ, AUSTRIA

来源：

LIPIDS | 1996年 / 31卷 / 12期

关键词：

D O I：

10.1007/BF02587917

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A simple, accurate, and fast procedure for quantitative analysis of fatty acids (FA) in simple lipid subclasses from different biological specimens is presented. Lipid extracts of isolated plasma lipoproteins (very low, low, and high density lipoproteins; VLDL, LDL, and HDL, respectively) and permanent J774 mouse macrophages were fractionated into lipid subclasses by thin-layer chromatography (TLC) on silica gel 60 plates. Bands comigrating with authentic lipid standards were scraped off under argon and subjected to direct, in situ transesterification with BF3/MeOH in the presence of the TLC adsorbent. Fatty acid methyl esters were subsequently quantitated by capillary gas chromatography. A comparison of the FA content present in total lipid extracts and in lipid subclasses separated by TLC revealed recoveries ranging from 93 (J774 cell extracts) to 99.7% (LDL). The method described is applicable for the measurement of FA in individual lipid subclasses and was successfully applied to quantitatively analyze the FA composition of the phospholipid, triacylglycerol, and cholesteryl ester fraction derived from VLDL, LDL, and HDL. In J774 lipid extracts, the FA composition of the phospholipid-, monoacylglycerol-, diacylglycerol, free fatty acid-, triacylglycerol-, and cholesteryl ester fraction was quantitated. In addition we have analyzed the time-dependent loss of the major HDL polyunsaturated fatty acids (18:2, 20:4) in the phospholipid and cholesteryl ester fraction during copper-dependent peroxidation of HDL. We have not encountered analytical problems concerning low FA recoveries from CE-rich lipid extracts as indicated by almost quantitative recoveries of FA in LDL, HDL, and J774 extracts.

引用

页码：1303 / 1310

页数：8

共 33 条

[1]

[Anonymous], ADV LIPID METHODOLOG

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