PMID- 15962390 OWN - NLM STAT- MEDLINE DCOM- 20051121 LR - 20190430 IS - 1007-9327 (Print) IS - 2219-2840 (Electronic) IS - 1007-9327 (Linking) VI - 11 IP - 23 DP - 2005 Jun 21 TI - Relationship between the downregulation of HLA class I antigen and clinicopathological significance in gastric cancer. PG - 3628-31 AB - AIM: To discuss the expression of human leukocyte antigen (HLA) class I antigens in gastric cancer and correlate these with pathologic type and TNM stage. METHODS: The expression of HLA class I antigen was detected by immunohistochemistry in 185 specimens of gastric cancer, 20 gastric cancer specimens with lymphatic metastasis and 22 controls of normal gastric mucosa using four monoclonal antibodies. RESULTS: The expression of HLA class I antigen (B/C locus) was significantly downregulated in gastric cancer and in lymphatic metastasis than that in normal gastric mucosa (chi2=7.712, P<0.05). The expression of other HLA class I antigens was also downregulated, but the change was slight. There was no relationship between the downregulation of HLA class I antigen and that of beta2m and LMP2. The expression of HLA class I (B/C locus) was statistically correlated with pathologic stage in gastric adenocarcinoma (chi2=4.164, P<0.05). CONCLUSION: The expression of HLA class I antigen (B/C locus) was obviously downregulated in gastric cancer and in lymphatic metastasis. This abnormal expression would provide the tumor cells with a way to avoid immunological recognition. FAU - Shen, Yu-Qing AU - Shen YQ AD - State Education Ministry Laboratory of Development Genes and Human Diseases, Southeast University Medical School, 87 Dingjiaqiao Road, Nanjing 210009, Jiangsu Province, China. FAU - Zhang, Jian-Qiong AU - Zhang JQ FAU - Miao, Feng-Qing AU - Miao FQ FAU - Zhang, Jian-Min AU - Zhang JM FAU - Jiang, Qin AU - Jiang Q FAU - Chen, Hao AU - Chen H FAU - Shan, Xiang-Nian AU - Shan XN FAU - Xie, Wei AU - Xie W LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - World J Gastroenterol JT - World journal of gastroenterology JID - 100883448 RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Female MH - Gastric Mucosa/cytology/immunology MH - Gene Expression Regulation, Neoplastic/immunology MH - HLA Antigens MH - Histocompatibility Antigens Class I/*genetics MH - Humans MH - Immunohistochemistry MH - Lymphatic Metastasis/immunology MH - Male MH - Middle Aged MH - Reference Values MH - Stomach Neoplasms/*genetics/*immunology/pathology PMC - PMC4315976 EDAT- 2005/06/18 09:00 MHDA- 2005/12/13 09:00 PMCR- 2005/06/21 CRDT- 2005/06/18 09:00 PHST- 2005/06/18 09:00 [pubmed] PHST- 2005/12/13 09:00 [medline] PHST- 2005/06/18 09:00 [entrez] PHST- 2005/06/21 00:00 [pmc-release] AID - 10.3748/wjg.v11.i23.3628 [doi] PST - ppublish SO - World J Gastroenterol. 2005 Jun 21;11(23):3628-31. doi: 10.3748/wjg.v11.i23.3628.