These data were supported by findings in a separate cohort of control and inflammatory-PAH rats in which right ventricular systolic pressure (RVSP) assessed by cardiac catheterization correlated positively with mRNA expression quantity of the proline transporter SLC38A1 (r = 0.7, P = 0.021) and glucose transporter SLC2A1 (r = 0.75, P = 0.01). Here, SLC38A1 is linked to pulmonary arterial hypertension.