Mark T Waddingham, Vasco Sequeira, Diederik W D Kuster, Elisa Dal Canto, M Louis Handoko, Frances S de Man, Denielli da Silva Gonçalves Bós, Coen A Ottenheijm, Shengyi Shen, Robbert J van der Pijl, Jolanda van der Velden, Walter J Paulus, Etto C Eringa
Titin-dependent stiffening of cardiomyocytes is a significant contributor to left ventricular (LV) diastolic dysfunction in heart failure with preserved LV ejection fraction (HFpEF). Small heat shock proteins (HSPs), such as HSPB5 and HSPB1, protect titin and administration of HSPB5 in vitro lowers cardiomyocyte stiffness in pressure-overload hypertrophy. In humans, oral treatment with geranylgeranylacetone (GGA) increases myocardial HSP expression, but the functional implications are unknown. Our objective was to investigate whether oral GGA treatment lowers cardiomyocyte stiffness and attenuates LV diastolic dysfunction in a rat model of the cardiometabolic syndrome...
November 2023: Physiological Reports