NLRP3 and pulmonary arterial hypertension: The results of immunofluorescence (Figure 1J,M) and immunohistochemistry (Figure 1K,L) showed that AS‐IV inhibited the expression of calpain‐1 and NLRP‐3 in pulmonary tissue of rats with pulmonary hypertension, and the inhibitory effect was similar to that of MCC950 and MDL‐28170.