Obesity-Induced Coronary Microvascular Disease Is Prevented by iNOS Deletion and Reversed by iNOS Inhibition

Soham A Shah; Claire E Reagan; Julia E Bresticker; Abigail G Wolpe; Miranda E Good; Edgar H Macal; Helen O Billcheck; Leigh A Bradley; Brent A French; Brant E Isakson; Matthew J Wolf; Frederick H Epstein

doi:10.1016/j.jacbts.2022.11.005

Obesity-Induced Coronary Microvascular Disease Is Prevented by iNOS Deletion and Reversed by iNOS Inhibition

JACC Basic Transl Sci. 2023 Feb 1;8(5):501-514. doi: 10.1016/j.jacbts.2022.11.005. eCollection 2023 May.

Authors

Soham A Shah¹, Claire E Reagan¹, Julia E Bresticker¹, Abigail G Wolpe², Miranda E Good², Edgar H Macal², Helen O Billcheck³, Leigh A Bradley³, Brent A French^{1

4}, Brant E Isakson^{2

4}, Matthew J Wolf^{2

3}, Frederick H Epstein^{1

2}

Affiliations

¹ Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA.
² The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA.
³ Department of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia, USA.
⁴ Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.

Abstract

Coronary microvascular disease (CMD) caused by obesity and diabetes is major contributor to heart failure with preserved ejection fraction; however, the mechanisms underlying CMD are not well understood. Using cardiac magnetic resonance applied to mice fed a high-fat, high-sucrose diet as a model of CMD, we elucidated the role of inducible nitric oxide synthase (iNOS) and 1400W, an iNOS antagonist, in CMD. Global iNOS deletion prevented CMD along with the associated oxidative stress and diastolic and subclinical systolic dysfunction. The 1400W treatment reversed established CMD and oxidative stress and preserved systolic/diastolic function in mice fed a high-fat, high-sucrose diet. Thus, iNOS may represent a therapeutic target for CMD.

Keywords: HFpEF; cardiac MRI; coronary microvascular disease; iNOS.

Abstract

Grants and funding