Relationship between the downregulation of HLA class I antigen and clinicopathological significance in gastric cancer.

Abstract:

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.

journal_name

World J Gastroenterol

authors

Shen YQ,Zhang JQ,Miao FQ,Zhang JM,Jiang Q,Chen H,Shan XN,Xie W

doi

10.3748/wjg.v11.i23.3628

keywords:

subject

Has Abstract

pub_date

2005-06-21 00:00:00

pages

3628-31

issue

23

eissn

1007-9327

issn

2219-2840

journal_volume

11

pub_type

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