Prognostic role of high sensitivity C-reactive protein and interleukin-6 in glioma and meningioma patients

Abstract

High sensitivity C-reactive protein (hsCRP) and interleukin-6 (IL-6) can be important prognostic indicators of brain tumor patients. We investigated the association of circulating IL-6 and hsCRP concentrations with discharge outcomes and survival of glioma and meningioma patients. One-hundred and sixty-three (115 women; median age 57 years) patients admitted for meningioma (n = 94), high-grade glioma (n = 48) and low-grade glioma (n = 21) surgery were enrolled in this prospective cohort study. Serum samples were collected within 24 h of admission. Discharge outcome was evaluated using the Glasgow Outcome Scale (unfavorable outcome = score from 1 to 3). Follow-up continued until November, 2016. Elevated IL-6 (≥ 2 pg/ml) and hsCRP (≥ 1 mg/l) concentrations were present in 25 and 35% of brain tumor patients, respectively. Elevated IL-6 concentrations were associated with unfavorable outcome at hospital discharge, adjusting for brain tumor histological diagnosis, patient age and gender (OR 2.39, 95% CI 0.97–5.91, p = 0.05). Elevated hsCRP concentrations were not associated with discharge outcome (p = 0.13). In multivariate Cox regression analyses adjusted for patient age, gender, extent of tumor resection and adjuvant treatment, elevated IL-6 concentration was associated with greater mortality risk in high-grade glioma patients (OR 2.623; 95% CI 1.129–5.597; p = 0.01), while elevated hsCRP concentration was associated with greater mortality risk in meningioma patients (OR 3.650; 95% CI 1.038–12.831; p = 0.04). Elevated IL-6 concentration is associated with greater unfavorable outcome risk in brain tumor patients and with greater mortality in high-grade glioma patients, while elevated hsCRP concentration is associated with greater mortality in meningioma patients.

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