Biochemistry, Biophysics, and Structural Biology Commons^™

Amylin And Diabetic Cardiomyopathy – Amylin-Induced Sarcolemmal Ca2+ Leak Is Independent Of Diabetic Remodeling Of Myocardium, Miao Liu, Amanda Hoskins, Nirmal Verma, Donald M. Bers, Sanda Despa, Florin Despa

Pharmacology and Nutritional Sciences Faculty Publications

Amylin is a pancreatic β-cell hormone co-secreted with insulin, plays a role in normal glucose homeostasis, and forms amyloid in the pancreatic islets of individuals with type-2 diabetes. Aggregated amylin is also found in blood and extra-pancreatic tissues, including myocardium. Myocardial amylin accumulation is associated with myocyte Ca²⁺ dysregulation in diabetic rats expressing human amylin. Whether deposition of amylin in the heart is a consequence of or a contributor to diabetic cardiomyopathy remains unknown. We used amylin knockout (AKO) mice intravenously infused with either human amylin (i.e, the aggregated form) or non-amyloidogenic (i.e., monomeric) rodent amylin to test the …