Atherogenic alterations in hypertriglyceridemic patients would not depend on insulin resistance

Background and aimsSeveral studies have been carried out to characterize the different alterations associated with hypertriglyceridemia (HTG) and to identify this dyslipemia as an independent risk factor for cardiovascular disease (CVD). HTG is frequently, but not always, associated with insulin resistance (IR). The present study was aimed to evaluate if the alterations observed in biomarkers of CVD were similar in HTG states independently of IR.MethodsHTG was defined as triglycerides ≥1.69 mmol/l and IR as HOMA-IR ≥3.1. HTG-IR patients (n = 15) were compared with HTG subjects without IR (WIR) (n = 15) and with normotriglyceridemic (NTG)-WIR individuals (n = 30).ResultsBoth HTG groups shared the increment in VLDL-C and non-HDL-C, HDL enrichment in triglycerides and depletion in phospholipids, the decrease in adiponectin concentration, and the increase in CETP activity. HDL-C and VCAM-1 levels were altered only in HTG-IR patients in comparison with the other groups, while oxidized LDL was only higher in HTG-IR than the control group. Multiple regression analysis identified triglycerides as the independent predictor of HDL-C, CETP activity and oxidized LDL levels.ConclusionThe increase in triglycerides is the major determinant factor of the atherogenic modifications observed, while IR would be an amplifier factor.

► Patients with hypertriglyceridemia associated or not to insulin resistance.
► Lipoproteins were altered in hypertriglyceridemia disregarding insulin resistance.
► Oxidized LDL concentration was significantly higher in insulin resistant patients.
► Increased triglycerides were determinant of the atherogenic alterations observed.
► Insulin resistance would act as an amplifier factor in these patients.