Abstract:【Objective】 To evaluate the safety and therapeutic effect of dendritic cell (DC)-cytokine induced killer cells (CIKs) combined with neoadjuvant chemotherapy and targeted therapy in treatment of advanced breast cancer. 【Methods】 Thirty patients with advanced breast cancer (stage Ⅲ), who were admitted to the First People's Hospital of Chenzhou from Apr. 2013 to Sep. 2014, were treated by DC-CIKs combined with neoadjuvant chemotherapy and targeted therapy (Epirubicin + Cyclophosphamide - Paclitaxel + Herceptin) and taken as the combined treatment group. And thirty advanced breast cancer patients treated with neoadjuvant chemotherapy and targeted therapy (Epirubicin + Cyclophosphamide - Paclitaxel + Herceptin) during the same period were taken as the control group. The immune function, therapeutic effect, 1-year survival, life quality and side effects were compared between the two groups. Furthermore, the safety and therapeutic effects of DC-CIK therapy were observed. 【Results】 DC-CIKs from advanced colon cancer patients were successfully induced, the ratios of CD3+CD8+ and CD3+CD56+ cells in DC-CIKs were significantly increased after culture (P < 0.05). Compared with the control group, the ratios of CD3+CD8+ and CD3+CD56+ cells in the peripheral blood after combined therapy were significantly increased after culture (P < 0.05). The combined therapy increased IFN-γ and IL-2 levels (P < 0.05). In the control group, the ratios of CD3+CD8+, CD3+CD4+, CD3+CD56+ cells and IFN-γ, IL-2 levels decreased after culture without significant differences (P > 0.05). The disease remission rate (RR) of the combined therapy group was higher than that of the control group (70% vs 56.6%, P < 0.05). The 1-year survival rate of the combined therapy group and control group was 62% and 56% respectively, showing no significant difference (P > 0.05). The combined therapy group had fewer side effects (including bone marrow suppression, nausea and vomiting, and peripheral nerve toxicity) compared with the control group. (P < 0.05). 【Conclusions】 Treatment with DC-CIK cells combined with chemotherapy and targeted therapy is safe and effective for advanced breast cancer. It can also raise the remission rate and survival, and improve the quality of life of the patients.