Efficacy and safety of torcetrapib, a novel cholesteryl ester transfer protein inhibitor, in individuals with below-average high-density lipoprotein cholesterol levels

Michael H Davidson, James M McKenney, Charles L Shear, James H Revkin
Journal of the American College of Cardiology 2006 November 7, 48 (9): 1774-81

OBJECTIVES: This study was designed to evaluate the efficacy and safety of torcetrapib, a cholesteryl ester transfer protein (CETP) inhibitor, in subjects with low high-density lipoprotein cholesterol (HDL-C) levels.

BACKGROUND: Evidence suggests HDL-C is atheroprotective. A proven mechanism for increasing the level of HDL-C is the inhibition of CETP.

METHODS: A total of 162 subjects with below-average HDL-C (men <44 mg/dl; women <54 mg/dl) who were not taking lipid-modifying therapy were randomized to double-blind treatment with torcetrapib 10, 30, 60, or 90 mg/day or placebo ( approximately 30 subjects per group).

RESULTS: The percent change from baseline to Week 8 with torcetrapib (least-squares mean difference from placebo) was dose-dependent and ranged from 9.0% to 54.5% for HDL-C (p < or = 0.0001 for 30 mg and higher doses) and from 3.0% to -16.5% for low-density lipoprotein cholesterol (LDL-C) (p < 0.01 for 90-mg dose). Low-density lipoprotein cholesterol lowering was less in subjects with higher (>150 mg/dl) versus lower levels of baseline triglycerides; at 60 mg, the change in LDL-C was 0.1% versus -22.2% (p < 0.0001), respectively. Particle size for both HDL and LDL increased with torcetrapib. There were no dose-related increases in the frequency of adverse events. Significant blood pressure increases were noted in 2 of 140 subjects.

CONCLUSIONS: Torcetrapib resulted in substantial dose-dependent elevations in HDL-C, accompanied by moderate decreases in LDL-C at the higher doses. Torcetrapib was generally well tolerated.

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