The fatty acid composition of plasma cholesteryl esters and estimated desaturase activities in patients with nonalcoholic fatty liver disease and the effect of long-term ezetimibe therapy on these levels

Clinica Chimica Acta; International Journal of Clinical Chemistry
Hyohun ParkTakeshi Okanoue

Abstract

The aim of this study was to investigate the relationship between fatty acid composition of plasma cholesteryl esters (CEs) and estimated desaturase activity and the development and progression of nonalcoholic fatty liver disease (NAFLD). The study also assessed the effect of ezetimibe on CE levels. Plasma CEs fatty acid composition was analyzed in 3 groups: patients with a NAFLD activity score (NAS) ≤ 4 (n=31) or NAS ≥ 5 (n=32) and normal controls (n=25). The estimated desaturase activities were calculated using ratios of 16:1n-7/16:0 (D9-16D), 18:1n-9/18:0 (D9-18D), 18:3n-6/18:2n-6 (D6D) and 20:4n-6/20:3n-6 (D5D). Compared with controls, the levels of palmitate, palmitoleate, γ-linoleate, D9-16D and D6D were significantly increased, whereas levels of linoleate and D5D were significantly decreased. Patients with NAS ≥ 5 had significantly higher palmitate levels than patients with NAS ≤ 4. The levels of these fatty acids, especially palmitate and palmitoleate, correlated with NAFLD-related lipid, metabolic, and inflammatory parameters. Long-term therapy with ezetimibe caused significant improvements in the levels of these fatty acids, estimated desaturase activity index and NAFLD-related parameters. Our results suggest that fat...Continue Reading

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