Reductions in remnant cholesterol and VLDL cholesterol through inhibition of ANGPTL3 protein synthesis: an analysis from the TRANSLATE-TIMI 70 trial.

ABSTRACT

AIMS: Remnant cholesterol and very low-density lipoprotein cholesterol (VLDL-C) are increasingly recognized risk factors for atherosclerotic disease with few therapeutic options. Angiopoietin-like 3 (ANGPTL3), a key protein in the metabolism of triglyceride-rich lipoproteins, is a promising target. METHODS AND RESULTS: TRANSLATE-TIMI 70 was a double-blind, placebo-controlled randomized trial testing seven dose regimens of vupanorsen, an antisense oligonucleotide against ANGPTL3, in adults with non-HDL-C ≥ 100 mg/dL and triglycerides 150-500 mg/dL. The primary endpoint of this analysis was percentage change in remnant cholesterol (total cholesterol minus directly measured LDL-C minus HDL-C) and VLDL-C (directly measured) over 24 weeks. Two hundred eighty-six patients were enrolled, with a median age of 64 years and 44% female. Median baseline remnant cholesterol and VLDL-C were 42 and 31 mg/dL, respectively (reference <30 mg/dL). Vupanorsen lowered remnant cholesterol by 42-59% at 24 weeks over placebo (P < 0.001), achieving a median level of 18 mg/dL at the highest dose. Over the same period, VLDL-C was reduced by 52-67% over placebo (P < 0.001), with a median achieved level of 2.5 mg/dL at the highest dose. The effect of vupanorsen on remnant cholesterol and VLDL-C reduction was dose-dependent and directly associated with the degree of ANGPTL3 inhibition at 90% ANGPTL3 reduction, there was a 61% and 81% decrease in remnant cholesterol and VLDL-C, respectively. CONCLUSION: Inhibition of ANGPTL3 protein synthesis significantly lowered remnant cholesterol and VLDL-C in patients with hypertriglyceridaemia. The magnitude of reduction was associated with the degree of ANGPTL3 inhibition. These findings support ANGPTL3 inhibition as a promising target for lowering cholesterol on triglyceride-rich lipoproteins.

In this randomized controlled trial of 286 participants with elevated triglycerides, treatment with vupanorsen, an ANGPTL3 inhibitor, lowered remnant cholesterol by up to 59% and VLDL cholesterol by up to 67% over placebo. The effect of the treatment was sustained throughout 24 weeks and consistent across key patient subgroups. ANGPTL3 inhibition may be a promising approach to treat patients with elevated triglycerides.