The main cluster populated by the Oasl1−/−Apoe−/− mouse group (EC Sub-cluster 4) showed increased expression of genes associated with pulmonary hypertension and atherosclerosis, including Selp, Edn1, Ctla2a, Ccl2, Mmrn1, Plvap, and Lgmn (Fig. 4h, Supplementary Fig. 7b). This evidence concerns the gene SELP and pulmonary arterial hypertension.