AUTHOR= Frontiers Editorial Office TITLE=Retraction: Matrine protects cardiomyocytes against hyperglycemic stress by promoting mitofusin 2-induced mitochondrial fusion JOURNAL=Frontiers in Physiology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.1006553 DOI=10.3389/fphys.2022.1006553 ISSN=1664-042X