Abstract
Objectives: Acute myocardial infarction (AMI) is the most prevalent cause of myocardial
fibrosis and the leading cause of mortality from cardiovascular disease. The goal of this
work was to synthesize Balanites aegyptiaca oil-silver nanoparticles (BAO-Ag-NPs) and evaluate
their cardioprotective effect against ISO-induced myocardial infarction in rats, as well as
their mechanism.
Materials and Methods: BAO was isolated, and the unsaturated fatty acids were estimated.
BAO-Ag-NPs was prepared, LD50 was calculated to evaluate its cardioprotective activity
against ISO (85 mg/kg)-induced AMI. Different doses of BAO-Ag-NPs (1/50 LD50; 46.6
mg/kg.b.w and 1/20 LD50; 116.5 mg) were received to the rats.
Results: The total fatty acids and unsaturated fatty acids generated by BAO were 909.63 and
653.47 mg/100 g oil, respectively. Oleic acid methyl ester, 9-octadecenoic acid methyl ester, and
9, 12-Octadecadienoic acid methyl ester were the predominant ingredients, with concentrations
of 107.6, 243.42, and 256.77 mg/100 g oil, respectively. According to TEM and DLS examinations,
BAO-Ag-NPs have a size of 38.20 ± 2.5 nm and a negative zeta potential of -19.82 ± 0.30
mV, respectively. The LD50 of synthesized BAO-Ag-NPs is 2330 mg. On the other hand, BAOAg-
NPs reduce myocardial necrosis by lowering increased BNP, cTnI, CK-MB, TC, TG, MDA,
MMP2, TGF-β1, PGE2, and IL-6 levels. Furthermore, BAO-Ag-NPs inhibit the expression of
ET-1, ICAM-1, and VCAM-1 genes as well as enhance HDL-C, CAT, and GSH levels when
compared to the ISO-treated group of rats. Histopathological findings suggested that BAO-Ag-
NPs enhance cardiac function by increasing posterior wall thickness in heart tissues.
Conclusion: BAO-Ag-NPs protect against AMI in vivo by regulating inflammation, excessive
autophagy, and oxidative stress, as well as lowering apoptosis via suppression of the ET-1,
ICAM-1, and VCAM-1 signaling pathways.
Keywords:
BAO-Ag-NPs, AMI, CAT, GSH, IL-6, ET-1, ICAM-1, VCAM-1.
Graphical Abstract
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