The sodium–glucose cotransporter 2 (SGLT2) inhibitor empagliflozin was recently reported to reduce heart failure-associated hospitalizations and cardiovascular mortality amongst individuals with type 2 diabetes at high cardiovascular risk. We sought to elucidate the underlying mechanism(s) for these protective effects using a validated zebrafish heart failure model to evaluate the impact of empagliflozin on the expression of biomarkers of heart failure and mortality. We used aristolochic acid (AA) to induce heart failure in developing cmlc2::GFP transgenic zebrafish embryos and monitored BNP signaling in nppb::Luc transgenic zebrafish with a luciferase reporter assay. Empagliflozin markedly reduced the morphological and functional cardiac changes induced by AA; dampened AA-enhanced expression of brain natriuretic peptide and atrial natriuretic peptide; and reduced embryonic mortality. Furthermore, morpholino-mediated knockdown of the slc5A2 gene mimicked the changes evoked by empagliflozin in developing zebrafish embryos previously exposed to AA. We report herein the first mechanistic data demonstrating a salutary benefit of SGLT2 inhibition on critical pathways of heart failure signaling. These findings provide important translational clues to the cardiovascular benefits documented in the EMPA-REG OUTCOME study.
Molecular and Cellular Biochemistry – Springer Journals
Published: Apr 8, 2017
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