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Polyunsaturated fatty acids in plasma lipids of obese children with and without metabolic cardiovascular syndrome
Author(s) -
Decsi Tamás,
Csabi Györgyi,
Török Katalin,
Erhardt Éva,
Minda Hajnalka,
Burus István,
Molnár Szilárd,
Molnár Dénes
Publication year - 2000
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/s11745-000-0634-7
Subject(s) - medicine , endocrinology , arachidonic acid , polyunsaturated fatty acid , metabolic syndrome , hyperinsulinemia , linoleic acid , dyslipidemia , fatty acid , obesity , lipidology , chemistry , clinical chemistry , insulin resistance , biochemistry , enzyme
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.