IL18 and acute respiratory distress syndrome: Similarly, a conspicuous enhancement in the relative protein level of NLRP3, pro‐caspase‐1/caspase1‐p20 and cleaved Gasdermin D, and the contents of IL‐1β and IL‐18 in the LPS‐treated MH‐S cells, which indicated that LPS evoked canonical pyroptosis in LPS‐treated ALI in vitro.