Mechanistic Role of Methanolic Extract of Taraxacum officinale Roots as Cardioprotective Against Ischemia-Reperfusion Injury-Induced Myocardial Infarction in Rats.

Taraxacum officinale play an important role in the prophylaxis and treatment of cardiovascular disease (CVD). Taraxacum officinale is proven as promising antioxidant in earlier studies and one of its constituent "cichoric acid" is shown to have vasorelaxant property. Therefore, present study mainly designed to investigate the cardioprotective effects of Taraxacum officinale against ischemia-reperfusion injury (I/R injury)-induced myocardial dysfunction in rats. This study not only explored the overall cardioprotective potential but also tried to explore its molecular mechanism using pharmacological inhibition via L-NAME and glibenclamide. Pretreatment of methanolic extract of Taraxacum officinale significantly attenuated (p < 0.001) increased levels of lactate dehydrogenase (LDH), creatine kinase (CK), infarct size, and thiobarbituric acid reactive substance (TBARS), while it increased the reduced levels of protein content, glutathione (GSH), and catalase (CAT) activity. Results showed that pretreatment with methanolic extract of Taraxacum officinale provides cardioprotection against I/R induced myocardial dysfunction, at least, may be mediated through the endogenous release of nitric oxide.