Key result
Intradermal L-Ag/R reduces inflammation and adverse remodeling to improve cardiac function in acute MI mice.
Why the study?
Excessive inflammation following myocardial infarction drives adverse remodeling and heart failure, while current cell therapies are costly, time-consuming, and of marginal clinical efficacy.
Does intradermal injection of liposomal nanoparticles loaded with MI antigens and rapamycin improve cardiac function and prevent adverse remodeling in acute MI mice?
Does intradermal injection of liposomal nanoparticles loaded with MI antigens and rapamycin improve cardiac function and prevent adverse remodeling in acute MI mice?
Nanoparticle-mediated delivery of MI antigens and rapamycin attenuates post-MI inflammation and improves cardiac function in a mouse model, offering a potential strategy to prevent post-MI heart failure.
Severe cardiac damage following myocardial infarction (MI) causes excessive inflammation, which sustains tissue damage and often induces adverse cardiac remodeling toward cardiac function impairment and heart failure. Timely resolution of post-MI inflammation may prevent cardiac remodeling and development of heart failure. Cell therapy approaches for MI are time-consuming and costly, and have shown marginal efficacy in clinical trials. Here, nanoparticles targeting the immune system to attenuate excessive inflammation in infarcted myocardium are presented. Liposomal nanoparticles loaded with MI antigens and rapamycin (L-Ag/R) enable effective induction of tolerogenic dendritic cells presenting the antigens and subsequent induction of antigen-specific regulatory T cells (Tregs). Impressively, intradermal injection of L-Ag/R into acute MI mice attenuates inflammation in the myocardium by inducing Tregs and an inflammatory-to-reparative macrophage polarization, inhibits adverse cardiac remodeling, and improves cardiac function. Nanoparticle-mediated blocking of excessive inflammation in infarcted myocardium may be an effective intervention to prevent the development of post-MI heart failure.
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Kwon et al. (2021) studied Myocardial Infarction. Liposomal nanoparticles loaded with MI antigens and rapamycin (L-Ag/R) was evaluated on Inflammation, cardiac remodeling, and cardiac function. Intradermal injection of L-Ag/R into acute MI mice attenuated myocardial inflammation, inhibited adverse cardiac remodeling, and improved cardiac function.
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