Importantly, type‐H endothelium (CD31+EMCN+) rose markedly with DM+I (206.30 ± 18.68; P < 0.0001) but fell with DM+A (56.70 ± 1.09 vs 95.08 ± 10.65 in DM; P < 0.05) (Figure 5A,B). Here, EMCN is linked to diabetes mellitus.