Atorvastatin attenuation of ABCB1 expression is mediated by microRNA miR-491-3p in Caco-2 cells

Autor(es)

Rodrigues, Alice C. ; Neri, Elida Adalgisa ; Verissimo-Filho, Sidney ; Reboucas, Nancy Amaral ; Hirata, Rosario D. C. ; Yu, Ai-Ming

• Tipo de documento: Artigo Científico
• Fonte: European Journal of Pharmaceutical Sciences; v. 93, p. 431-436, OCT 10 2016.
• Citações Web of Science: 5

Resumo

Aim: Atorvastatin, a HMG-CoA reductase inhibitor, used in the treatment of hypercholesterolemia, has been previously shown to regulate ABCB1 expression in vivo and in vitro. We hypothesized that the statin could regulate gene expression of ABCB1 transporter via microRNAs. Methods: Expression of microRNAs and ABCB1 mRNA was examined in atorvastatin-treated and control cells using real-time PCR. miR-491-3P mimic and inhibitor were transfected in Caco-2 and ABCB1 expression was monitored by western blot and real-time PCR. Results: In HepG2 cells, none of the microRNAs predicted to target ABCB1 3'UTR was regulated by atorvastatin treatment. In agreement with this, ABCB1 3'UTR activity was not modulated in HepG-2 cells after 48 h-treatment as measured by luciferase assay. In Caco-2 cells, atorvastatin treatment provoked a decrease in luciferase activity and, accordingly, miR-491-3p was upregulated about 2.7 times after 48 h-statin treatment. Luciferase analysis of miR-491-3p with a mimetic or inhibitor of miR-491-3p revealed that this microRNA could target ABCB1 3'UTR, as after miR-491-3p inhibition, ABCB1 levels were increased by two-fold, and miR-491-3p superexpression decreased ABCB1 3'UTR activity. Finally, functional analysis revealed that treatment with miR-491-3p inhibitor could reverses atorvastatin attenuation of ABCB1 (Pg-p) protein levels. Conclusion: Our results suggest atorvastatin control ABCB1 expression via miR-491-3p in Caco-2 cells. This finding may be an important mechanism of statin drug-drug interaction, since common concomitant drugs used in the prevention of cardiovascular diseases are ABCB1 substrates. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/05876-6 - Avaliação de microRNAs no desenvolvimento da resistência à insulina
• Beneficiário: Alice Cristina Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 08/01465-9 - Estudo de associação entre 230 SNPs em 60 genes candidatos e a resposta à atorvastatina
• Beneficiário: Alice Cristina Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado