PMID- 8667622 OWN - NLM STAT- MEDLINE DCOM- 19960808 LR - 20131121 IS - 0022-4790 (Print) IS - 0022-4790 (Linking) VI - 62 IP - 3 DP - 1996 Jul TI - Cis-diamminedichloroplatinum(II) augments expression of tumor-associated antigens on human gastric cancer cell line KATO-3 and increases susceptibility and binding of tumor cells to various cytotoxic effector cells. PG - 162-70 AB - Previous studies have demonstrated the immunomodulatory effects of cisplatin under certain conditions. The present study was designed to clarify whether cisplatin modulates the expression of surface antigens, especially human leukocyte antigen (HLA), on human tumor cell lines and/or augments the susceptibility and binding of tumor cells to cytotoxic effector cells. A human gastric cancer cell line, KATO-3, was employed. The expression of HLA and other tumor-associated antigens was analyzed by flow cytometry using FITC-conjugated monoclonal antibodies. The cytotoxicity of effector cells was determined by 51Cr release assay. The expression of HLA class I antigen, beta2-microglobulin, leukocyte function-associated antigen-1, and AC-81 adenocarcinoma-associated antigen on KATO-3 increased after exposure to cisplatin at 10 micrograms/ml for 3-6 hr; augmentation of HLA class I subtypes -B2 and -B27 was particularly prominent. Furthermore, the susceptibility and binding of KATO-3 to both lymphokine-activated killer cells and KATO-3-specific cytotoxic T lymphocytes significantly increased after cisplatin treatment. Cisplatin may modulate the expression of tumor-associated antigens on some human tumor cells. Tumor regression by cisplatin administration may depend on its direct cytotoxicity as well as on its modulating effects on the expression of tumor-associated antigens, subsequently leading to the activation of the immune surveillance system against the tumor. FAU - Hayashi, H AU - Hayashi H AD - First Department of Surgery, Kyoto University, Faculty of Medicine, Japan. FAU - Nio, Y AU - Nio Y FAU - Kawabata, K AU - Kawabata K FAU - Araya, S AU - Araya S FAU - Imamura, M AU - Imamura M LA - eng PT - Journal Article PL - United States TA - J Surg Oncol JT - Journal of surgical oncology JID - 0222643 RN - 0 (Adjuvants, Immunologic) RN - 0 (Antigens, Neoplasm) RN - 0 (Antigens, Surface) RN - 0 (Antineoplastic Agents) RN - 0 (HLA Antigens) RN - Q20Q21Q62J (Cisplatin) SB - IM MH - Adjuvants, Immunologic/*pharmacology MH - Antigens, Neoplasm/*drug effects/immunology MH - Antigens, Surface/drug effects/immunology MH - Antineoplastic Agents/*pharmacology MH - Carcinoma/*immunology MH - Cisplatin/*pharmacology MH - Cytotoxicity Tests, Immunologic/methods MH - Dose-Response Relationship, Drug MH - Flow Cytometry/methods MH - HLA Antigens/drug effects/immunology MH - Humans MH - Killer Cells, Lymphokine-Activated/*immunology MH - Lymphocyte Culture Test, Mixed/methods MH - Stimulation, Chemical MH - Stomach Neoplasms/*immunology MH - T-Lymphocytes, Cytotoxic/*immunology MH - Time Factors MH - Tumor Cells, Cultured EDAT- 1996/07/01 00:00 MHDA- 2000/06/20 09:00 CRDT- 1996/07/01 00:00 PHST- 1996/07/01 00:00 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1996/07/01 00:00 [entrez] AID - 10.1002/(SICI)1096-9098(199607)62:3<162::AID-JSO4>3.0.CO;2-5 [pii] AID - 10.1002/(SICI)1096-9098(199607)62:3<162::AID-JSO4>3.0.CO;2-5 [doi] PST - ppublish SO - J Surg Oncol. 1996 Jul;62(3):162-70. doi: 10.1002/(SICI)1096-9098(199607)62:3<162::AID-JSO4>3.0.CO;2-5.