PPARD and pulmonary arterial hypertension: Further work published in Pulmonary Circulation established the transcriptomic profile and pathways associated with activating PPARβ/δ in a model of pulmonary artery banding and right heart hypertrophy.1 These results and the fact that enhancing PPARβ/δ is linked to increased endurance exercise performance2 supports the idea that drugs working on this pathway could be beneficial in PAH.