title: Pim-1: A new biomarker in pulmonary arterial hypertension.
abstract: Provirus integration site for Moloney murine leukemia virus (Pim-1) is an oncoprotein overexpressed in lungs from pulmonary arterial hypertension (PAH) patients and involved in cell proliferation via the activation of the NFAT/STAT3 signaling pathway. We hypothesized that Pim-1 plasma levels would predict the presence of PAH and correlate with disease severity. Pim-1 plasma levels were measured at the time of catheterization in 49 PAH patients, including nonvasoreactive ( n = 19) and vasoreactive idiopathic PAH (n = 5), and PAH related to connective tissue disease (n = 16) and congenital heart disease (n = 9). Fifty controls were also recruited. The capacity of Pim-1 to discriminate PAH from controls and its association with disease severity were assessed. Pim-1 plasma levels were higher in PAH than in controls (9.6 ± 4.0 vs. 7.2 ± 2.4 ng/mL, P < 0.01). Pim-1 appropriately discriminated proliferative PAH from controls (AUC = 0.78 to 0.94 using ROC curves). Among PAH patients, Pim-1 correlated with traditional markers of PAH severity. The 1-year survival was 97% and 47% for PAH patients with baseline Pim-1 levels lower and higher than 11.1 ng/mL, respectively (HR 11.4 (3.3-39.7); P < 0.01). After adjustment for hemodynamic and biochemical variables, Pim-1 levels remained an independent predictor of mortality (P < 0.01). Pim-1 is a promising new biomarker in PAH.
authors: Pulmonary Hypertension Group of the Institut universitaire de cardiologie et de pneumologie de Québec Research Center, Laval University, Quebec City, Canada ; Cardiology, Center Hospital University Timone, Public Assistance Hospitals of Marseille, Aix-Marseille University, Marseille, France.
authors: Sébastien
authors: S
authors: Renard
authors: Roxane
authors: R
authors: Paulin
authors: Sandra
authors: S
authors: Breuils-Bonnet
authors: Serge
authors: S
authors: Simard
authors: Philippe
authors: P
authors: Pibarot
authors: Sébastien
authors: S
authors: Bonnet
authors: Steeve
authors: S
authors: Provencher
keywords: Pim-1; biomarker; oncoprotein; prognosis; pulmonary arterial hypertension; pulmonary vascular remodeling
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