Cardio- and neuroprotective effects by pretreatment of dietary moringin from Moringa oleifera seeds and α-CD/moringin formulation in a rat model of isoproterenol-induced myocardial infarction.

Abstract

The aim of this study was to investigate the cardio- and neuroprotective effects of moringin (MG), a dietary isothiocyanate readily derived from Moringa oleifera seed, in a rat model of isoproterenol (ISP) induced myocardial infarction (MI). Thirty-two adult male Sprague Dawley rats were divided into 4 groups: a control group, an MI group, a group pretreated with freshly prepared MG solution (MG + MI; glucomoringin 20 mg/kg + 30 µl myrosinase/rat), and a group pretreated with a stable α-cyclodextrin-based formulation of MG (α-CD/MG + MI, 42 mg/kg). Pretreatment was administered daily for 7 days. On days 6 and 7, rats received ISP (85 mg/kg, subcutaneously) at 24-hour interval. MI rats exhibited impaired hemodynamic and behavioural responses, marked elevation of malondialdehyde (MDA), and reduced activity of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) in both myocardial and hippocampus tissues. MI rats also demonstrated a significant rise in serum cardiac biomarkers, including cardiac troponin I (cTnI) and creatine kinase myocardial band (CK-MB). In contrast, pretreatment with MG and α-CD/MG significantly improved locomotor and exploration behaviour, reduced heart rate (HR), and enhanced mean arterial pressure (MAP). Furthermore, both treatments lowered serum cardiac markers, restored redox balance, normalised brain monoamines levels, and improved the histoarchitecture of myocardial and hippocampus tissues. These findings suggested that MG and α-CD/MG exert cardioprotective and neuroprotective effects by attenuating oxidative stress in a rat model of ISP-induced MI. Overall, intake of MG and α-CD/MG may represent a potentially effective pretreatment strategy for mitigating the systemic perturbations associated with myocardial infarction.