28Apr 2023
Exploring the Complexities of Pulmonary Arterial Hypertension: A Multi-Omics Analysis of the Activin Signaling System in the Lungs

Exploring the Complexities of Pulmonary Arterial Hypertension: A Multi-Omics Analysis of the Activin Signaling System in the Lungs

The study investigated whether activin pathway members could serve as biomarkers for pulmonary arterial hypertension (PAH). Serum levels of activin A, activin B, α-subunit of inhibin A and B proteins, and the antagonists follistatin and follistatin-like 3 (FSTL3) were measured in patients with newly diagnosed PAH. The study found that activin A and FSTL3 were associated with transplant-free survival in PAH patients. The study also confirmed the prognostic values of activin A and FSTL3 in an independent external validation cohort. Histological analyses showed a nuclear accumulation of the phosphorylated form of Smad2/3, higher immunoreactivities for ACTRIIB, ALK2, ALK4, ALK5, ALK7, Cripto, and FSTL3 in vascular endothelial and smooth muscle layers, and lower immunostaining for inhibin-α and follistatin. Overall, the findings offer new insights into the activin signaling system in PAH and highlight activin A and FSTL3 as potential biomarkers for PAH.

  • #cardiology

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