NPPA and myocardial infarction: A deficiency in circPostn decreases the expression of collagen 1α1 and collagen 3α1, which inactivates the atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) in the ventricular tissues, reduces the infarct size, and significantly alleviates myocardial injury in mice affected by MI [71].