1. Dephosphorylated uncarboxylated Matrix-Gla-Protein as candidate biomarker for immune-mediated vascular remodeling and prognosis in pulmonary hypertension.
- Author
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Tobal, R., Potjewijd, J., de Vries, F., van Doorn, D. P.C., Jaminon, A., Bittner, R., Akbulut, C., van Empel, V., Heeringa, P., Damoiseaux, J., Schurgers, L., and van Paassen, P.
- Subjects
IMMUNE checkpoint proteins ,VASCULAR remodeling ,MATRIX Gla protein ,PULMONARY arterial hypertension ,VASCULAR smooth muscle - Abstract
Pulmonary arterial hypertension (PAH) is a disease characterized by pulmonary vascular remodeling. Since dephosphorylated-uncarboxylated Matrix Gla-Protein (dp-ucMGP) is associated with cardiovascular mortality in systemic sclerosis, a disease associated with PAH, and immune-system involvement in PAH is increasingly recognized, we investigated the relationship between dp-ucMGP, vascular remodeling and soluble immune-checkpoint proteins in PAH. This prospective cohort study included patients with idiopathic (I)PAH, connective tissue disease (CTD)-PAH, chronic thrombo-embolic PH (CTEPH) and CTD patients without PAH. Patients with IPAH and CTD-PAH were stratified by clinical signs of immune-mediated inflammatory disease (IMID). We measured dp-ucMGP plasma levels, soluble immune-checkpoint proteins (sICPs), and vascular smooth muscle cell (iVSMC) calcification. We found elevated dp-ucMGP levels in all PAH subtypes and CTD patients compared to healthy controls. PAH patients showed increased iVSMC calcification, but no direct correlation was found with dp-ucMGP. IMID-PAH patients had higher dp-ucMGP levels than non-IMID PAH patients. dp-ucMGP correlated with several sICPs in both IPAH and CTD patients; multiple sICPs were elevated in IMID PAH patients. High dp-ucMGP levels in IPAH patients were associated with worse survival. Our findings suggest dp-ucMGP as a potential biomarker of immune-mediated vascular remodeling in PAH. Hence, dp-ucMGP, could help identify PAH patients who might benefit from immunosuppressive therapies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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