Pitavastatin Reduces Lectin-Like Oxidized Low-Density Lipoprotein Receptor-1 Ligands in Hypercholesterolemic Humans
The aim of this study was to determine the impact of pitavastatin on low-density lipoprotein cholesterol (LDL-C) and lectin-like oxidized LDL receptor-1 (LOX-1) in patients with hypercholesterolemia. Twenty-five hypercholesterolemic patients (8 male, 17 female; age 66 ± 13, 21–80 years) who had not received anti-dyslipidemic agents and had LDL-C levels of more than 160 mg/dL were examined. Biochemical factors were measured at baseline and after treatment with pitavastatin (2 mg/day) for 6 months. Serum levels of LOX-1 with apolipoprotein B-100 particle ligand and a soluble form of LOX-1 (sLOX-1) were measured by ELISA. All subjects completed the study with no adverse side effects. Total-C (268 ± 26 vs. 176 ± 17 mg/dL), LDL-C (182 ± 21 vs. 96 ± 14 mg/dL), and LOX-1 ligand (867 ± 452 vs. 435 ± 262 ng/mL) were reduced with pitavastatin treatment (P < 0.0001 for each). Significant decreases in triacylglycerols were noted (P < 0.0001), but there were no changes in high-density lipoprotein cholesterol. After 6 months, there were no significant changes in high-sensitivity CRP or soluble LOX-1. At baseline, there were no significant correlations between LOX-1 ligand and either LDL-C or sLOX-1. The decrease in LOX-1 ligand was not correlated with the decrease in LDL-C, but was correlated with the decrease in sLOX-1 (r = 0.47, P < 0.05). In conclusion, pitavastatin therapy had beneficial effects on markers of oxidative stress in hypercholesterolemic subjects. Serum levels of LOX-1 ligand may be a useful biomarker of the pleiotropic effects of statins.