Lipids

, Volume 35, Issue 11, pp 1179–1184 | Cite as

Polyunsaturated fatty acids in plasma lipids of obese children with and without metabolic cardiovascular syndrome

  • Tamás Decsi
  • Györgyi Csabi
  • Katalin Török
  • Éva Erhardt
  • Hajnalka Minda
  • István Burus
  • Szilárd Molnár
  • Dénes Molnár
Article

Abstract

Previously we reported significantly higher values of γ-linolenic acid (GLA, 18∶3n−6), dihomo-γ-linolenic acid (DHGLA, 20∶3n−6), and arachidonic acid (20∶4n−6) in plasma lipid classes in obese children than in nonobese controls. In the present study, fatty acid composition of plasma phospholipids (PL) and sterol esters (STE) was determined by high-resolution capillary gas-liquid chromatography in obese children with an without metabolic cardiovascular syndrome [MCS: defined as simultaneous presence of (i) dyslipidemia, (ii) hyperinsulinemia, (iii) hypertension, and (iv) impaired glucose tolerance] and in nonobese controls. Fatty acid composition of PL and STE lipids did not differ between obese children without MCS and controls. Obese children with MCS exhibited significantly lower linoleic acid (LA, 18∶2n−6) values in PL (17.43 [2.36], %wt/wt, median [range from the first to the third quartile]) than obese children without MCS (19.14 [3.49]) and controls (20.28 [3.80]). In contrast, PL GLA values were significantly higher in obese children with (0.13 [0.08]) than in those without MCS (0.08 [0.04]), whereas STE GLA values were higher in obese children with MCS (1.04 [0.72]) than in controls (0.62 [0.48]). DHGLA values in PL were significantly higher in obese children with MCS (4.06 [0.74]) than in controls (2.69 [1.60]). The GLA/LA ratio was significantly higher, whereas the AA/DHGLA ratio was significantly lower in obese children with MCS than in obese children without MCS and in controls. In this study, LA metabolism was affected only in obese children with but not in those without MCS. In obese children with MCS, δ6-desaturase activity appeared to be stimulated, whereas δ5-desaturase activity appeared to be inhibited. Disturbances in LA metabolism may represent an additional health hazard within the multifaceted clinical picture of MCS.

Abbreviations

AA

arachidonic acid

DHGLA

dihomo-γ-linolenic acid

EFA

essential fatty acid

GLA

γ-linolenic acid

LA

lmoleic acid

LCPUFA

long-chain polyunsaturated fatty acid

MCS

metabolic cardiovascular syndrome

PL

phospholipid

PUFA

polyunsaturated fatty acid

STE

sterol ester

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Copyright information

© AOCS Press 2000

Authors and Affiliations

  • Tamás Decsi
    • 1
  • Györgyi Csabi
    • 1
  • Katalin Török
    • 1
  • Éva Erhardt
    • 1
  • Hajnalka Minda
    • 1
  • István Burus
    • 1
  • Szilárd Molnár
    • 1
  • Dénes Molnár
    • 1
  1. 1.Department of PaediatricsUniversity of PécsPécsHungary

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