JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Serum suppression of tumorigenicity 2 level is an independent predictor of all-cause mortality in HIV-infected patients.

AIDS 2017 November 14
OBJECTIVE: To evaluate the predictive value of soluble suppression of tumorigenicity 2 (sST2), a decoy receptor of IL-33 involved in several inflammatory and immune diseases, for death in HIV infection.

DESIGN: Patients enrolled in the ANRS CO3 Aquitaine Cohort, a prospective hospital-based cohort of HIV-1-infected patients, who had a plasma sample available in the biobank were systematically eligible.

METHODS: sST2, soluble CD14 (sCD14) and IL-6 were measured using Luminex multiplex bead-based technology (R&D Systems) and a Bio-Plex 200 instrument (BioRad). Predictive capacities of sST2, sCD14, IL-6 and of the Veterans Aging Cohort Study clinical score at baseline on overall mortality were compared using multivariable Cox proportional hazards models.

RESULTS: During a median follow-up of 7.2 years [interquartile range (IQR): 6.0; 7.9], 93 deaths from all causes (incidence rate 9.9 per 1000 patient-years; 95% confidence interval 7.9-11.9) were reported in 1414 patients. The median sST2 baseline concentration was 22.9 ng/ml (IQR: 17.7; 30.3) and was higher (30.8 ng/ml, IQR: 21.5; 42.1) in patients who died as compared with those who stayed alive (22.6 ng/ml; IQR: 17.5; 29.6) (P < 10). An increased risk of death of 21% for a concentration 10.0 ng/ml higher of sST2 remained after adjustment for sCD14, IL-6 and Veterans Aging Cohort Study score (adjusted hazard ratio: 1.21; P < 10). The predictive capacity of sST2 was confirmed in a validation cohort (n = 386, 31 deaths) with an improved area c-index from 0.804 without sST2 to 0.811 with sST2.

CONCLUSION: sST2 is a new valuable biomarker to evaluate the risk of all-cause mortality in HIV disease.

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