LEP and pulmonary arterial hypertension: Using the SomaLogic proteomic platform, we found that in PAH patients, leptin (9133.93 ± 8,245) was moderately correlated (r2 = 0.43, slope = 0.001) (p < 0.001) with body mass index (BMI) (29.8 ± 8) (Figure 1C).