For instance, the levels of lncRNA nuclear paraspeckle assembly transcript 1 (NEAT1) and matrix metalloproteinase‐9 (MMP‐9) in the serum exosomes of patients with ST‐segment elevation myocardial infarction (STEMI) are notably higher than in patients with unstable angina or non‐MI.[50] Thus, the two lncRNAs has been suggested as independent predictors of STEMI by logistic regression analysis. This evidence concerns the gene MMP9 and angina pectoris.