Confirmation of the Cardioprotective Effect of MitoGamide in the Diabetic Heart
Baeza-Garza, Carlos D.
Caldwell, Stuart T.
Pun, Pamela Boon Li
Prag, Hiran A.
Gruszczyk, Anja V.
Prime, Tracy A.
Coughlan, Melinda T.
Ritchie, Rebecca H.
Di Lisa, Fabio
Smith, Robin A. J.
Hartley, Richard C.
Murphy, Michael P.
Cardiovascular Drugs and Therapy
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Park, M., Nishimura, T., Baeza-Garza, C. D., Caldwell, S. T., Pun, P. B. L., Prag, H. A., Young, T., et al. (2020). Confirmation of the Cardioprotective Effect of MitoGamide in the Diabetic Heart. Cardiovascular Drugs and Therapy, 34 (6), 823-834. https://doi.org/10.1007/s10557-020-07086-7
Abstract: Purpose: HFpEF (heart failure with preserved ejection fraction) is a major consequence of diabetic cardiomyopathy with no effective treatments. Here, we have characterized Akita mice as a preclinical model of HFpEF and used it to confirm the therapeutic efficacy of the mitochondria-targeted dicarbonyl scavenger, MitoGamide. Methods and Results: A longitudinal echocardiographic analysis confirmed that Akita mice develop diastolic dysfunction with reduced E peak velocity, E/A ratio and extended isovolumetric relaxation time (IVRT), while the systolic function remains comparable with wild-type mice. The myocardium of Akita mice had a decreased ATP/ADP ratio, elevated mitochondrial oxidative stress and increased organelle density, compared with that of wild-type mice. MitoGamide, a mitochondria-targeted 1,2-dicarbonyl scavenger, exhibited good stability in vivo, uptake into cells and mitochondria and reactivity with dicarbonyls. Treatment of Akita mice with MitoGamide for 12 weeks significantly improved the E/A ratio compared with the vehicle-treated group. Conclusion: Our work confirms that the Akita mouse model of diabetes replicates key clinical features of diabetic HFpEF, including cardiac and mitochondrial dysfunction. Furthermore, in this independent study, MitoGamide treatment improved diastolic function in Akita mice.
Original Article, Diabetes, Heart failure with preserved ejection fraction (HFpEF), Akita mice, Advanced glycation endproducts (AGE), Mitochondria
British Heart Foundation (PG/15/84/31670)
Consejo National de Ciencia y Technologia (n/a)
Medical Research Council (MC_U105663142)
Wellcome Trust (110159/Z/15/Z)
Biotechnology and Biological Sciences Research Council (BB/I012826/1)
Wellcome Trust (110158/Z/15/Z)
National Health and Medical Research Council (APP1059960)
Generalitat of Catalonia (SLT002/16/00250)
Department of Business and Knowledge (2017SGR696)
External DOI: https://doi.org/10.1007/s10557-020-07086-7
This record's URL: https://www.repository.cam.ac.uk/handle/1810/313065