TP53 and pulmonary arterial hypertension: Through WGCNA, DEGs analysis, and miRNA identification, it was concluded that the common pathways of CPH and PAH were “lipid (accumulation) metabolism,” “inflammatory response,” and “P53 signaling pathway.” The common pathways of INCPH and PAH were “telomere,” “intestinal inflammation,” and “toxin transport.” The common pathways of PH (including CPH and INCPH) and PAH included the P53 signaling pathway and telomere.