Abstract:
Myocardial infarction (MI), commonly known as a heart attack, is a leading cause of death worldwide. The ischemic damage during MI results in irreversible loss of cardiomyocytes, leading to impaired cardiac function and heart failure. Current treatment strategies aim to restore blood flow and limit infarct size, but they often fail to address the long-term consequences of MI. Biomimetic nanomaterials, which mimic the structural and functional properties of natural tissues, have emerged as a promising therapeutic approach to minimize myocardial damage post-MI.
In this preclinical study, we investigate the efficacy of biomimetic nanomaterials in reducing infarct size and improving cardiac function after MI in a mouse model. We design and synthesize a novel biomimetic nanomaterial composed of self-assembling peptides that mimic the extracellular matrix (ECM) of the heart tissue. The nanomaterial is engineered to provide a supportive scaffold for cell growth, promote angiogenesis, and reduce inflammation.
The nanomaterial is administered to mice post-MI via intramyocardial injection. Our results demonstrate that the nanomaterial significantly reduces infarct size and improves cardiac function compared to control animals. Histological analysis reveals increased cardiomyocyte survival, reduced fibrosis, and enhanced angiogenesis in the infarcted area. Mechanistic studies indicate that the nanomaterial promotes cell proliferation, migration, and differentiation, while also modulating inflammatory responses.
Our study provides promising evidence for the potential of biomimetic nanomaterials in minimizing myocardial damage and improving cardiac function post-MI. Further research is warranted to evaluate the safety and efficacy of these nanomaterials in larger animal models and clinical trials.
Keywords: Biomimetic nanomaterials, Myocardial infarction, Cardiac repair, Tissue engineering, Extracellular matrix, Cardiomyocyte survival, Angiogenesis, Inflammation.
