Myrrhone exert cardioprotective effect against isoproterenol-induced myocardial injury in rats via alteration of NF-κB and Bax/Bcl-2/caspase-3 signaling

TL;DR

Myrrhone protects rat hearts from isoproterenol-induced injury by modulating inflammation and apoptosis pathways.

Contribution

Myrrhone's cardioprotective mechanism via NF-κB and Bax/Bcl-2/caspase-3 signaling is newly demonstrated in ISO-induced myocardial injury.

Findings

Myrrhone significantly altered ECG parameters and improved heart and body weight ratios.

Myrrhone suppressed cardiac and hepatic enzymes and modulated inflammatory cytokines and apoptosis markers.

Myrrhone treatment altered mRNA expression of IL-6, IL-1β, TNF-α, Bcl-2, caspase-3, Bax, and caspase-9.

Abstract

To examine the cardioprotective effects of myrrhone against isoproterenol (ISO)-induced myocardial injury in rats.

Myocardial injury was induced in the rats through subcutaneous administration of ISO (85 mg/kg). The body weight, heart weight, electrocardiogram (ECG), cardiac, antioxidant, electrolyte, membrane-bound enzymes, antioxidant, cytokines, and inflammatory parameters were estimated. The mRNA expression of inflammatory parameters was estimated in the cardiac tissue.

Myrrhone treatment significantly (p < 0.001) altered ECG parameters, body weight, heart weight, and heart weight/body weight ratio. Myrrhone significantly (p < 0.001) improved the level of 5-hydroxytryptamine (5-HT) and suppressed the level of cardiac parameters like creatine kinase-MB, creatine kinase, lactate dehydrogenase, cardiac troponin I, and cardiac troponin T. It also suppressed the level of hepatic parameters such as aspartate aminotransferase, and alanine transaminase; altered the electrolyte, membrane-bound enzymes, and antioxidant parameters. Myrrhone treatment significantly (p < 0.001) altered the level of cytokines such as tumor necrosis factor-α (TNF-α), interleukin (IL)-10, IL-1β, IL-17, and IL-6; inflammatory parameters like cyclooxygenase-2, prostaglandin, inducible nitric oxide synthetase, nuclear factor kappa-light-chain enhancer of activated B cells; matrix metalloproteinases such as 2, and 9; apoptosis parameters viz., Bcl-2-associated X protein (Bax), B-cell lymphoma 2 protein (Bcl-2), and caspase-3 parameters. Myrrhone treatment significantly (p < 0.001) altered the mRNA expression IL-6, IL-1β, IL-10, TNF-α, Bcl-2, caspase-3, Bax, and caspase-9.

Myrrhone exhibited the cardioprotective effect against ISO-induced myocardial injury in rats via alteration of kappa-light-chain enhancer of activated B cells (NF-κB) and Bax/Bcl-2/caspase-3 signaling.

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