Elevated Serum IL-17A but not IL-6 in Glioma Versus Meningioma and Schwannoma

  • Doroudchi, Mehrnoosh (Department of Immunology, School of Medicine, Shiraz University of Medical Sciences) ;
  • Pishe, Zahra Ghanaat (Shiraz University of Medical Sciences) ;
  • Malekzadeh, Mahyar (Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences) ;
  • Golmoghaddam, Hossein (Department of Immunology, School of Medicine, Shiraz University of Medical Sciences) ;
  • Taghipour, Mousa (Shiraz University of Medical Sciences) ;
  • Ghaderi, Abbas (Department of Immunology, School of Medicine, Shiraz University of Medical Sciences)
  • Published : 2013.09.30


Background: There is a Th1/Th2 cytokine imbalance and expression of IL-17 in patients with brain tumours. We aimed to compare the levels of IL-17A and IL-6 in sera of glioma, meningioma and schwannoma patients as well as in healthy individuals. Materials and Methods: IL-17A and IL-6 levels were measured in sera of 38 glioma, 24 meningioma and 18 schwannoma patients for comparison with 26 healthy controls by commercial ELISA assays. Results: We observed an increase in the IL-17A in 30% of glioma patients while only 4% and 5.5% of meningioma and schwannoma patients and none of the healthy controls showed elevated IL-17A in their sera ($0.29{\pm}0.54$, $0.03{\pm}0.15$ and $0.16{\pm}0.68$ vs. $0.00{\pm}0.00pg/ml$; p=0.01, p=0.01 and p=0.001, respectively). There was also a significant decrease in the level of IL-6 in glioma patients compared to healthy controls ($2.34{\pm}4.35$ vs. $4.67{\pm}4.32pg/ml$; p=0.01). There was a direct correlation between the level of IL-17A and age in glioma patients (p=0.005). Glioma patients over 30 years of age had higher IL-17A and lower IL-6 in their sera compared to the young patients. In addition, a non-significant grade-specific inverse trend between IL-17A and IL-6 was observed in glioma patients, where high-grade gliomas had higher IL-17A and lower IL-6. Conclusions: Our data suggest a Th17 mediated inflammatory response in the pathogenesis of glioma. Moreover, tuning of IL-6 and IL-17A inflammatory cytokines occurs during progression of glioma. IL-17A may be a potential biomarker and/or immunotherapeutic target in glioma cases.




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