PMID- 22709877 OWN - NLM STAT- MEDLINE DCOM- 20130305 LR - 20161125 IS - 0172-6390 (Print) IS - 0172-6390 (Linking) VI - 59 IP - 120 DP - 2012 Nov-Dec TI - A new development of FG-CC' siRNA blocking interaction of Tim-1 and Tim-4 can enhance DC vaccine against gastric cancer . PG - 2677-82 AB - BACKGROUND/AIMS: Dendritic cells (DCs) are professional antigen-presenting cells responsible for initiating of immune response. However, because of immune tolerance, it is difficult to induce long-term tumor-specific immune response in humans. This is probably because DCs, which combine with Th2 in the Tim-1/Tim-4 pathway, will induce Th2 to proliferation. METHODOLOGY: We have transfected siRNA of FG-CC' gene into DCs stimulated by gastric cancer lysate (lysate-FG-CC-siRNA group), FG-CC-siRNA will block FG-CC' loop,which plays an important role in interaction between Tim-1 and Tim-4. Their potential effect on gastric cancer immunotherapy is assessed by an experimental model. RESULTS: It was observed that lysate-FG-CC-siRNA had the strongest ability of adjusting balance on the Thl/Th2, as a result, these DCs can inhibit gastric cancer growth. In order to test the ability of FG-CC-siR-NA DCs to inhibit tumor growth, we immunized mice subcutaneously with DCs transfected with FG-CC-siR-NA plus tumor antigen. Compared with the control group, a significant inhibition of tumor growth was obvious for the group of lysate-FG-CC-siRNA DC. CONCLUSIONS: We have shown that FG-CC-siRNA blocks FG-CC'loop and significantly enhances the anti-tumor immunity in vitro and in vivo. FAU - Sun, Hua-Wen AU - Sun HW AD - Department of Gastrointestinal Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China. sunhuawenmail@gmail.com FAU - Wu, Chong AU - Wu C FAU - Tan, Hai-Yan AU - Tan HY FAU - Wang, Qiu-Shuang AU - Wang QS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Greece TA - Hepatogastroenterology JT - Hepato-gastroenterology JID - 8007849 RN - 0 (Antibodies, Monoclonal, Murine-Derived) RN - 0 (Cancer Vaccines) RN - 0 (Cytokines) RN - 0 (HAVCR1 protein, human) RN - 0 (Hepatitis A Virus Cellular Receptor 1) RN - 0 (Membrane Glycoproteins) RN - 0 (Membrane Proteins) RN - 0 (RNA, Small Interfering) RN - 0 (Receptors, Virus) RN - 0 (TIMD4 protein, human) SB - IM MH - Animals MH - Antibodies, Monoclonal, Murine-Derived/genetics/*metabolism MH - *Cancer Vaccines MH - Cell Line, Tumor MH - Cell Proliferation MH - Cytokines/metabolism MH - Dendritic Cells/immunology/*transplantation MH - Electroporation MH - Female MH - Genetic Therapy/*methods MH - Hepatitis A Virus Cellular Receptor 1 MH - Humans MH - Lymphocytes, Tumor-Infiltrating/immunology MH - Membrane Glycoproteins/genetics/*metabolism MH - Membrane Proteins/genetics/*metabolism MH - Mice MH - Mice, Inbred BALB C MH - Phenotype MH - Protein Binding MH - *RNA Interference MH - RNA, Small Interfering/*metabolism MH - Receptors, Virus/genetics/*metabolism MH - Stomach Neoplasms/genetics/immunology/pathology/*therapy MH - Th1 Cells/immunology MH - Th2 Cells/immunology MH - Time Factors MH - Transfection MH - Tumor Burden MH - Xenograft Model Antitumor Assays EDAT- 2012/06/20 06:00 MHDA- 2013/03/06 06:00 CRDT- 2012/06/20 06:00 PHST- 2012/06/20 06:00 [entrez] PHST- 2012/06/20 06:00 [pubmed] PHST- 2013/03/06 06:00 [medline] AID - 10.5754/hge11620 [doi] PST - ppublish SO - Hepatogastroenterology. 2012 Nov-Dec;59(120):2677-82. doi: 10.5754/hge11620.