Natriuretic Peptide Receptor-C (NPR3) in Pulmonary Hypertension Associated with Chronic Lung Disease: A PRISMA-ScR Scoping Review of Diagnostic, Prognostic, Mechanistic, and Therapeutic Evidence

Background/Objectives: Pulmonary hypertension associated with chronic lung disease remains difficult to diagnose, phenotype, and manage because vascular remodeling, parenchymal lung injury, hypoxemia, inflammation, fibrosis, and right ventricular dysfunction often coexist. Natriuretic peptides are widely used as cardiopulmonary biomarkers, but the receptor-level role of natriuretic peptide receptor-C, encoded by NPR3, remains incompletely defined. This scoping review mapped original empirical evidence on NPR-C/NPR3 and related C-type natriuretic peptide biology in pulmonary hypertension, chronic lung disease, pulmonary vascular remodeling, and right ventricular adaptation.