Glycaemic variability underlies myocyte dysfunction and myocardial injury risk in diabetes
Cao, Y.; Redd, M. A.; Outhwaite, J. E.; Mizikovsky, D.; Shim, W. J.; Fang, C.; Wu, Z.; Daygon, D.; Stark, T.; Palfreyman, R.; Chiu, H. S.; Tan, C.; Thomas, U.; Dragicevic, E.; Sng, J.; Barrett, H.; Dorey, E.; Shah, S.; Short, K.; Palpant, N. J.
Show abstract
Heart disease is the leading cause of morbidity and mortality in individuals with diabetes, due largely to risks associated with ischaemic injuries such as myocardial infarction (MI). We use human population genetic data to demonstrate that current biomarkers of hyperglycaemia do not account for risk of post-MI mortality in diabetes patients. This study therefore systematically evaluates glycaemic stress underpinning cardiovascular risk in diabetes. Using in vivo and in vitro models, we demonstrate that glycaemic variability rather than hyperglycaemia alone is a dominant risk factor for heart muscle dysfunction and myocardial injury sensitivity in diabetes. These findings provide new preclinical models for mechanistic and drug discovery studies and inform strategies for managing cardiovascular outcomes in patients with diabetes.
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