Cholesterol Efflux Capacity and Pre-Beta-1 HDL Concentrations Are Increased in Dyslipidemic Patients Treated With Evacetrapib.

MedStar author(s):
Citation: Journal of the American College of Cardiology. 66(20):2201-10, 2015 Nov 17.PMID: 26564598Institution: MedStar Health Research InstituteForm of publication: Journal ArticleMedline article type(s): Clinical Trial, Phase II | Journal Article | Multicenter Study | Randomized Controlled TrialSubject headings: *Anticholesteremic Agents/tu [Therapeutic Use] | *Benzodiazepines/tu [Therapeutic Use] | *Cholesterol/bl [Blood] | *Dyslipidemias/dt [Drug Therapy] | *High-Density Lipoproteins, Pre-beta/bl [Blood] | *Hydroxymethylglutaryl-CoA Reductase Inhibitors/tu [Therapeutic Use] | ATP Binding Cassette Transporter 1/me [Metabolism] | Cholesterol Ester Transfer Proteins/ai [Antagonists & Inhibitors] | Cholesterol Ester Transfer Proteins/me [Metabolism] | Double-Blind Method | Drug Therapy, Combination | Dyslipidemias/bl [Blood] | Female | Humans | Hydroxymethylglutaryl-CoA Reductase Inhibitors/ad [Administration & Dosage] | Male | Middle AgedYear: 2015Local holdings: Available online from MWHC library: 1995 - present, Available in print through MWHC library:1999-2007ISSN:
  • 0735-1097
Name of journal: Journal of the American College of CardiologyAbstract: BACKGROUND: Potent cholesteryl ester transfer protein (CETP) inhibitors have been shown to substantially increase high-density lipoprotein cholesterol (HDL-C) and apolipoprotein A-I levels as monotherapy and combined with statins. However, data on the effects of this class of drugs on macrophage cholesterol efflux capacity (CEC), a functional assay that characterizes a key step in the process of reverse cholesterol transport, are limited.CONCLUSIONS: Evacetrapib, as monotherapy and combined with statins, not only increased total CEC, but also increased ABCA1-specific CEC and pre-beta-1 HDL. The mechanisms by which potent CETP inhibition increases ABCA1-specific CEC and pre-beta-1 HDL require further study. (A Study of LY2484595 in Patients With High LDL-C or Low HDL-C; NCT01105975).Copyright © 2015 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.METHODS: We analyzed samples from 377 subjects with elevated low-density lipoprotein cholesterol (LDL-C) or low HDL-C levels who were enrolled in a phase 2 trial of evacetrapib. Percent changes from baseline in CEC (total, non-ABCA1-, and ABCA1-specific) and HDL subpopulations were evaluated after 12 weeks of treatment with placebo, statin monotherapy, evacetrapib monotherapy, or evacetrapib combined with statins. Pre-beta-1 HDL levels were quantified by immunofixation and nondenaturing 2-dimensional gel electrophoresis (2DGE).OBJECTIVES: This study assessed the impact of evacetrapib, statins, or combination therapy on CEC.RESULTS: Relative to placebo, evacetrapib monotherapy increased dose-dependent total and non-ABCA1-specific CEC up to 34% and 47%, respectively. Evacetrapib monotherapy also increased ABCA1-specific CEC up to 26%. Relative to statin monotherapy, evacetrapib with statins also increased total, non-ABCA1-, and ABCA1-specific CEC by 21%, 27%, and 15%, respectively. In contrast, rosuvastatin and simvastatin significantly reduced total and ABCA1-specific CEC, whereas atorvastatin had no significant effect. Consistent with ABCA1-specific CEC, evacetrapib monotherapy and evacetrapib combined with statins significantly increased pre-beta-1 HDL levels as measured by either method.All authors: Adelman SJ, Brewer HB, Kane JP, Krueger KA, Nicholls SJ, Nissen SE, Rader DJ, Ruotolo G, Wang MDFiscal year: FY2016Digital Object Identifier: Date added to catalog: 2016-05-24
Holdings
Item type Current library Collection Call number Status Date due Barcode
Journal Article MedStar Authors Catalog Article 26564598 Available 26564598

Available online from MWHC library: 1995 - present, Available in print through MWHC library:1999-2007

BACKGROUND: Potent cholesteryl ester transfer protein (CETP) inhibitors have been shown to substantially increase high-density lipoprotein cholesterol (HDL-C) and apolipoprotein A-I levels as monotherapy and combined with statins. However, data on the effects of this class of drugs on macrophage cholesterol efflux capacity (CEC), a functional assay that characterizes a key step in the process of reverse cholesterol transport, are limited.

CONCLUSIONS: Evacetrapib, as monotherapy and combined with statins, not only increased total CEC, but also increased ABCA1-specific CEC and pre-beta-1 HDL. The mechanisms by which potent CETP inhibition increases ABCA1-specific CEC and pre-beta-1 HDL require further study. (A Study of LY2484595 in Patients With High LDL-C or Low HDL-C; NCT01105975).Copyright © 2015 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

METHODS: We analyzed samples from 377 subjects with elevated low-density lipoprotein cholesterol (LDL-C) or low HDL-C levels who were enrolled in a phase 2 trial of evacetrapib. Percent changes from baseline in CEC (total, non-ABCA1-, and ABCA1-specific) and HDL subpopulations were evaluated after 12 weeks of treatment with placebo, statin monotherapy, evacetrapib monotherapy, or evacetrapib combined with statins. Pre-beta-1 HDL levels were quantified by immunofixation and nondenaturing 2-dimensional gel electrophoresis (2DGE).

OBJECTIVES: This study assessed the impact of evacetrapib, statins, or combination therapy on CEC.

RESULTS: Relative to placebo, evacetrapib monotherapy increased dose-dependent total and non-ABCA1-specific CEC up to 34% and 47%, respectively. Evacetrapib monotherapy also increased ABCA1-specific CEC up to 26%. Relative to statin monotherapy, evacetrapib with statins also increased total, non-ABCA1-, and ABCA1-specific CEC by 21%, 27%, and 15%, respectively. In contrast, rosuvastatin and simvastatin significantly reduced total and ABCA1-specific CEC, whereas atorvastatin had no significant effect. Consistent with ABCA1-specific CEC, evacetrapib monotherapy and evacetrapib combined with statins significantly increased pre-beta-1 HDL levels as measured by either method.

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