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Sucrose non-fermenting related kinase enzyme is essential for cardiac metabolism. Biol Open 2014 Dec 12;4(1):48-61

Date

12/17/2014

Pubmed ID

25505152

Pubmed Central ID

PMC4295165

DOI

10.1242/bio.20149811

Abstract

In this study, we have identified a novel member of the AMPK family, namely Sucrose non-fermenting related kinase (Snrk), that is responsible for maintaining cardiac metabolism in mammals. SNRK is expressed in the heart, and brain, and in cell types such as endothelial cells, smooth muscle cells and cardiomyocytes (CMs). Snrk knockout (KO) mice display enlarged hearts, and die at postnatal day 0. Microarray analysis of embryonic day 17.5 Snrk hearts, and blood profile of neonates display defect in lipid metabolic pathways. SNRK knockdown CMs showed altered phospho-acetyl-coA carboxylase and phospho-AMPK levels similar to global and endothelial conditional KO mouse. Finally, adult cardiac conditional KO mouse displays severe cardiac functional defects and lethality. Our results suggest that Snrk is essential for maintaining cardiac metabolic homeostasis, and shows an autonomous role for SNRK during mammalian development.

Author List

Cossette SM, Gastonguay AJ, Bao X, Lerch-Gaggl A, Zhong L, Harmann LM, Koceja C, Miao RQ, Vakeel P, Chun C, Li K, Foeckler J, Bordas M, Weiler H, Strande J, Palecek SP, Ramchandran R

Authors

Ramani Ramchandran PhD Professor in the Pediatrics department at Medical College of Wisconsin
Hartmut Weiler PhD Associate Professor in the Physiology department at Medical College of Wisconsin




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