Adiels, Martin, Chapman, M John, Robillard, Paul, Krempf, Michel, Laville, Martine, Borén, Jan, Niacin Study Group, ., Hôpital Guillaume et René Laennec - Centre Hospitalier Universitaire de Nantes, Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL), Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hospices Civils de Lyon (HCL), University of Gothenburg (GU), Dyslipidémies, inflammation et athérosclérose dans les maladies métaboliques, Institut National de la Santé et de la Recherche Médicale (INSERM), Physiopathologie des Adaptations Nutritionnelles (PhAN), Université de Nantes (UN)-Institut National de la Recherche Agronomique (INRA), Mécanisme Moléculaire du Diabète (MMD), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM), GlaxoSmithKline (Les Ulis, France), Randox Laboratories (Crumlin, N. Ireland), Sahlgrenska University Hospital ALF Research Grants, National Institute for Health and Medical Research, ARLA (Association for Research on Lipoproteins and Atherogenesis), Randox Laboratories, Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de la Recherche Agronomique (INRA)-Université de Nantes (UN), and ProdInra, Migration
International audience; BACKGROUND: Niacin as an adjunct to statin treatment to reduce cardiovascular risk is questioned. OBJECTIVE: To evaluate interrelationships between the effects of niacin on mixed dyslipidemia and a spectrum of metabolic and inflammatory biomarkers. METHODS: Obese, nondiabetic, hypertriglyceridemic males (n = 19) with low high-density lipoprotein cholesterol levels received extended-release nicotinic acid for 8 weeks. Multiple biomarkers were measured using enzyme-linked immunosorbent assay, enzymatic/absorptiometric, or multiplex biochip assays. Treatment effects were determined for each variable and a differential correlation network created on the basis of univariate correlations between baseline and response to niacin treatment for all pairs of variables. RESULTS: Extended-release niacin treatment favoured normalization of plasma lipid and apolipoprotein profile. Plasma markers of inflammation, hepatic function, cellular adhesion and proliferation, and macrophage phenotype were attenuated; however, insulin resistance increased. Differential network analysis revealed that changes in triglycerides and high-density lipoprotein cholesterol were closely linked; equally, niacin mediated reductions in total cholesterol, apolipoprotein B, low-density lipoprotein cholesterol and lipoprotein(a) clustered together, as did homeostatic model assessment of insulin resistance, insulin, and interleukin-6 levels. Two clusters of inflammatory markers were identified, involving (1) intercellular adhesion molecule 1 and high-sensitive C-reactive protein and (2) soluble tumor necrosis factor receptors; and novel clusters involving matrix metallopeptidase 9 and apolipoprotein E, and adiponectin and cystatin C, respectively, were equally revealed. At lower stringency, lipid and insulin resistance clusters were linked; a C-reactive protein-centered cluster linked reduction in apolipoprotein Cu to intercellular adhesion molecule 1, gamma-glutamyltransferase, soluble tumor necrosis factor receptors, and E-selectin. CONCLUSION: A niacin-mediated trend to normalize atherogenic mixed dyslipidemia was intimately linked to attenuation of biomarkers of inflammation, cell adhesion, hepatic dysfunction and cell proliferation, but to enhanced insulin resistance and plasma homocysteine elevation. (C) 2018 National Lipid Association. Published by Elsevier Inc.