• Zheng-Xu Wang, Jun-Xia Cao, Zhi-Ping Liu, Yu-Xin Cui, Chun-Yun Li, Duo Li, Xiao-Yan Zhang, Jin-Long Liu, and Jun-Li Li.
• Zheng-Xu Wang, Jun-Xia Cao, Chun-Yun Li, Duo Li, Xiao-Yan Zhang, Jin-Long Liu, Jun-Li Li, Biotherapy Center, the General Hospital of Beijing Military Command, Beijing 100700, China.
• World J. Gastroenterol. 2014 Jan 28; 20 (4): 1095-106.

AimTo investigate whether autologous dendritic cell (DC)-cytokine-induced killer (CIK) cell therapy is able to improve the therapeutic efficacy of chemotherapy in colon cancer.MethodsWe conducted a systematic review of published papers from the sources of MEDLINE, the Cochrane Central Register of Controlled Trials, EMBASE, the Wanfang Database, the China Science and Technology Periodical Database and China Journal Net. Published data were extracted independently by two authors using predefined database templates. The quality of the data from individual papers was also assessed. The effects of chemotherapy were compared with those of chemotherapy in combination with DC-CIK immunotherapy. The pooled analysis was performed using the data from random or fixed-effect models.ResultsSeven trials matched our inclusion criteria (n = 533). The overall analysis showed significant survival benefit [one-year overall survival (OS), P < 0.0001; two-year OS, P = 0.009; three-year OS, P = 0.002] in favor of DC-CIK immunotherapy combined with chemotherapy. Disease-free survival (DFS) rate was improved after the combination of DC-CIK immunotherapy and chemotherapy (one-year DFS, P < 0.0001; two-year DFS, P = 0.002; three-year DFS, P = 0.02). An improved overall response rate (P = 0.009) was also observed in patients who received DC-CIK therapy. Furthermore, the analysis of T-lymphocyte subsets in peripheral blood indicated that the number of CD4⁺ T cells significantly increased in the DC-CIK plus chemotherapy group (P < 0.05).ConclusionThe combination of DC-CIK immunotherapy and chemotherapy was superior in prolonging the survival time and enhancing immunological responses.

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