Increased circulating myeloid-derived suppressor cells correlate with cancer stages, interleukin-8 and -6 in prostate
Ning Chi1, Zhaohui Tan1, Kewei Ma1
1Department of Urology, Inner Mongolia People's Hospital Hohhot, Inner Mongolia Autonomous Region, China.
Aim:
Myeloid-derived suppressor cells (MDSCs) are a population of cells which negatively regulate immune response during tumor progression. In this study, we assessed the accumulation of MDSCs (CD33(+)CD11b(+)HLA-DR(-)CD14(-)) in patients with prostate cancer and its clinical relevance.
Methods:
We tested the frequency of MDSCs in the peripheral blood of patients with prostate cancer or benign prostate hyperplasia and healthy donors. Serumal interleukin-8, -6 and -10 were analyzed. Effects of MDSCs on the T cell response were determined.
Results:
MDSCs increased in cancer patients, and there was an association between MDSCs and cancer stages or overall survival. Elevated serumal interleukin-8 and -6 in cancer patients correlated with MDSCs. Moreover, accumulation of MDSCs was associated with defective T cell function.
Conclusion:
Our study showed an increased population of MDSCs in patients with prostate cancer. Interleukin-8 and -6 in serum may play a new important role companied with MDSCs in prostate cancer.
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