Liliana Muñoz-Hernandez1, Raul J Ortiz-Bautista2, Griselda Brito-Córdova3, Francisco Lozano-Arvizu2, Sharim Saucedo3, Oscar Pérez-Méndez4, Alejandro Zentella-Dehesa5, Carolane Dauteuille6, Marie Lhomme6, Philippe Lesnik6, M John Chapman6, Anatol Kontush6, Carlos A Aguilar Salinas7. 1. Unidad de Investigación de Enfermedades Metabólicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenue Vasco de Quiroga 15, Tlalpán, CP 14080, Mexico City, Mexico; Consejo Nacional de Ciencia y Tecnología (CONACyT), Avenue Insurgentes Sur 1582, Crédito Constructor, Benito Juárez, CP 03940, Mexico City, Mexico. 2. Unidad de Investigación de Enfermedades Metabólicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenue Vasco de Quiroga 15, Tlalpán, CP 14080, Mexico City, Mexico. 3. Departamento de Endocrinología y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutrición Salvador, Avenue Vasco de Quiroga 15, Tlalpán, CP 14080, Mexico City, Mexico. 4. Departmento de Biología Molecular, Instituto Nacional de Cardiología Ignacio Chávez, Avenue Juan Badiano1, Tlalpán, CP 14080, Mexico City, Mexico. 5. Departamento de Bioquímica, Instituto Nacioncal de Ciencias Médicas y Nutrición Salvador Zubirán, Avenue Vasco de Quiroga 15, Tlalpán, CP 14080, Mexico City, Mexico. 6. National Institute for Health and Medical Research (INSERM), UMR 1166 ICAN, UPMC Paris 6, Hospital La Pitié - Salpétrière, Paris, F-75013, France. 7. Unidad de Investigación de Enfermedades Metabólicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenue Vasco de Quiroga 15, Tlalpán, CP 14080, Mexico City, Mexico; Departamento de Endocrinología y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutrición Salvador, Avenue Vasco de Quiroga 15, Tlalpán, CP 14080, Mexico City, Mexico; Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Calle del puente 222, Ejidos de Huipulco, Tlalpán, 14380, Mexico City, Mexico. Electronic address: caguilarsalinas@yahoo.com.
Abstract
BACKGROUND AND AIMS: Research on the biologic activities of HDL, such as cholesterol efflux capacity and HDL composition, has allowed the understanding of the effect of interventions directed to improve cardiovascular risk. Previously, statin therapy has shown conflicting results about its effects on cholesterol efflux capacity of HDL; the underlying mechanisms are unclear but studies with positive effects are associated with an increase of HDL-cholesterol levels. We investigated if 10 weeks of atorvastatin therapy changes HDL efflux capacity and the chemical composition of its subpopulations. METHODS: In a before-after design basis, HDL-cholesterol levels, chemical composition and cholesterol efflux capacity from HDL subpopulations isolated by isophynic ultracentrifugation were assessed in plasma samples from 60 patients with type 2 diabetes mellito (T2DM) at baseline and after 10 weeks of treatment with 20 mg atorvastatin. Cholesterol efflux was measured from human THP-1 cells using large, light HDL2b and small, dense 3c subpopulations as well as total HDL as acceptors. Changes of cholesterol efflux and chemical composition of HDL after treatment were analyzed. Correlations among variables potentially involved in cholesterol efflux were evaluated. RESULTS: A significant decrease of 4% in HDL-cholesterol levels was observed from 47 (42-54) to 45 (39-56) mg/dL, p = 0.02. Cholesterol efflux from total-HDL and HDL2b and 3c subfractions was maintained unchanged after treatment. The total mass of HDL remained unaffected, except for the HDL3a subpopulation accounted for by a significant increase in total protein content. No significant correlations for variables previously known to be associated with cholesterol efflux were found in our study. CONCLUSIONS: Short therapy of 10 weeks with 20 mg of atorvastatin does not modify the cholesterol efflux capacity neither the total mass of HDL2b, HDL3c and total HDL. The discrepancy with previous reports may be due to the selective effects among different classes of statins or differences in the approaches to measure cellular cholesterol efflux.
BACKGROUND AND AIMS: Research on the biologic activities of HDL, such as cholesterol efflux capacity and HDL composition, has allowed the understanding of the effect of interventions directed to improve cardiovascular risk. Previously, statin therapy has shown conflicting results about its effects on cholesterol efflux capacity of HDL; the underlying mechanisms are unclear but studies with positive effects are associated with an increase of HDL-cholesterol levels. We investigated if 10 weeks of atorvastatin therapy changes HDL efflux capacity and the chemical composition of its subpopulations. METHODS: In a before-after design basis, HDL-cholesterol levels, chemical composition and cholesterol efflux capacity from HDL subpopulations isolated by isophynic ultracentrifugation were assessed in plasma samples from 60 patients with type 2 diabetes mellito (T2DM) at baseline and after 10 weeks of treatment with 20 mg atorvastatin. Cholesterol efflux was measured from human THP-1 cells using large, light HDL2b and small, dense 3c subpopulations as well as total HDL as acceptors. Changes of cholesterol efflux and chemical composition of HDL after treatment were analyzed. Correlations among variables potentially involved in cholesterol efflux were evaluated. RESULTS: A significant decrease of 4% in HDL-cholesterol levels was observed from 47 (42-54) to 45 (39-56) mg/dL, p = 0.02. Cholesterol efflux from total-HDL and HDL2b and 3c subfractions was maintained unchanged after treatment. The total mass of HDL remained unaffected, except for the HDL3a subpopulation accounted for by a significant increase in total protein content. No significant correlations for variables previously known to be associated with cholesterol efflux were found in our study. CONCLUSIONS: Short therapy of 10 weeks with 20 mg of atorvastatin does not modify the cholesterol efflux capacity neither the total mass of HDL2b, HDL3c and total HDL. The discrepancy with previous reports may be due to the selective effects among different classes of statins or differences in the approaches to measure cellular cholesterol efflux.
Authors: Allison B Reiss; Hirra A Arain; Lora J Kasselman; Heather A Renna; Juan Zhen; Iryna Voloshyna; Joshua DeLeon; Steven E Carsons; Michelle Petri Journal: Medicina (Kaunas) Date: 2019-08-21 Impact factor: 2.430