title: Cytokine-induced killer cells co-cultured with complete tumor antigen-loaded dendritic cells, have enhanced selective cytotoxicity on carboplatin-resistant retinoblastoma cells.
abstract: Retinoblastoma (RB) is a challenging disease that affects mostly young children. Chemical therapy has been shown to have limitations during clinical practice, principally because of the ability of RB to become resistant to the treatment. Nevertheless, chemotherapy is still the main treatment for RB, and immunotherapy has become a promising treatment for most solid tumors with fewer side effects than traditional therapies. In this study, we explored the antitumor effects of cytokine-induced killer (CIK) cells co-cultured with dendritic cells (DCs) pulsed with complete tumor antigens (DC-Ag). Cytotoxicity and specificity were evaluated on an RB cell line (RB-Y79), on a human normal retina cell line (hTERT-RPE1) and a carboplatin-resistant RB cell line. Our results showed that CIK differentiation and cytotoxicity were enhanced by co-culturing CIKs with DC-Ag. Moreover, the co-culture improved the CIK proliferation rate by increasing IL-6 and decreasing IL-10 levels in the culture medium. Furthermore, the use of DC-Ag-CIK cells had little effect on normal retinal cells but high cytotoxicity on RB cells even on carboplatin-resistant retinoblastoma cells. This is the first study showing that DC cells pulsed with the complete tumor antigen improve proliferation, differentiation and cytotoxic activity of CIKs specific not only for RB but also for the chemotherapy-resistant form of the malady. Thus highly efficient immunotherapy based on DC-Ag-CIK cells may be a potential effective and safe mean of treating RB especially to patients where traditional chemical therapy has failed.
authors: Graduate Division, Xinxiang Medical University, Xinxiang, He'nan 453003, PR China.
authors: Ya-Feng
authors: YF
authors: Wang
authors: Patricia E
authors: PE
authors: Kunda
authors: Jian-Wei
authors: JW
authors: Lin
authors: Han
authors: H
authors: Wang
authors: Xue-Mei
authors: XM
authors: Chen
authors: Qiu-Ling
authors: QL
authors: Liu
authors: Tao
authors: T
authors: Liu
mesh_terms: D000951:Antigens, Neoplasm / Q000276:immunology*; D016190:Carboplatin / Q000494:pharmacology*; D002454:Cell Differentiation / Q000276:immunology; D048708:Cell Growth Processes / Q000276:immunology; D002460:Cell Line; D045744:Cell Line, Tumor; D018920:Coculture Techniques; D055612:Cytokine-Induced Killer Cells / Q000276:immunology*; D003713:Dendritic Cells / Q000187:drug effects / Q000276:immunology*; D019008:Drug Resistance, Neoplasm; D006801:Humans; D016219:Immunotherapy, Adoptive / Q000379:methods*; D016753:Interleukin-10 / Q000276:immunology; D015850:Interleukin-6 / Q000276:immunology; D017949:Retinal Cone Photoreceptor Cells / Q000187:drug effects / Q000276:immunology; D012175:Retinoblastoma / Q000188:drug therapy / Q000276:immunology* / Q000628:therapy*
chemical_list: D000951:Antigens, Neoplasm; D015850:Interleukin-6; D016753:Interleukin-10; D016190:Carboplatin