Specialized Proresolving Mediators Protect Against Experimental Autoimmune Myocarditis by Modulating Ca2+ Handling and NRF2 Activation

JACC Basic Transl Sci. 2022 May 18;7(6):544-560. doi: 10.1016/j.jacbts.2022.01.009. eCollection 2022 Jun.

Abstract

Specialized proresolving mediators and, in particular, 5(S), (6)R, 7-trihydroxyheptanoic acid methyl ester (BML-111) emerge as new therapeutic tools to prevent cardiac dysfunction and deleterious cardiac damage associated with myocarditis progression. The cardioprotective role of BML-111 is mainly caused by the prevention of increased oxidative stress and nuclear factor erythroid-derived 2-like 2 (NRF2) down-regulation induced by myocarditis. At the molecular level, BML-111 activates NRF2 signaling, which prevents sarcoplasmic reticulum-adenosine triphosphatase 2A down-regulation and Ca2+ mishandling, and attenuates the cardiac dysfunction and tissue damage induced by myocarditis.

Keywords: 8OHdG, 8-hydroxy-2'-deoxyguanosine; BML-111, 5(S), (6)R, 7-trihydroxyheptanoic acid methyl ester; Ctrl, control; Cys, cysteine; EAM, experimental autoimmune myocarditis; EC, excitation-contraction; Epi, 15-epi-lipoxin A4; LXA4, lipoxin A4; Lut, luteolin; NRF2; NRF2, nuclear factor erythroid-derived 2-like 2; SCR, spontaneous diastolic Ca2+ release; SERCA2A; SERCA2A, sarcoplasmic reticulum–adenosine triphosphatase 2A; SPM, specialized proresolving mediator; SR, sarcoplasmic reticulum; Veh, vehicle; calcium handling; mRNA, messenger RNA; myocarditis; pro-resolving mediators.