Abstract
Introduction
Downregulation or loss of HLA class I molecules has been demonstrated in human cancers. The aim of this study was to assess the clinical significance of HLA class I expression in gastric cancer.
Methods
Gastric cancer tissues from 189 patients were examined for expression of HLA class I heavy chain antigens by immunohistochemical staining with EMR8-5. The expression level of HLA class I of tumor cells is categorized by combining an estimate the percentage of immunoreactive cell with an estimate of the staining intensity. The relationship between HLA class I expression and clinicopathologic parameters, patient survival, and tumor recurrence were analyzed.
Results
HLA class I was downregulated in 85 (45.0%) of the gastric carcinomas. Staining revealed 104 (55.0%) tumors with strongly positive expression of HLA class I antigens, 76 (40.2%) tumors with weakly positive expression, and 9 (4.8%) tumors with negative expression. The expression of HLA class I antigen did not correlate with any other clinicopathologic parameters. Moreover, HLA class I expression was neither a risk factor for tumor recurrence nor survival.
Conclusion
The downregulation of HLA class I expression is not associated with patient prognosis.
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Acknowledgments
This work was supported by a grant no. 01-2008-06 from the Hallym University Medical Center Research Fund.
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Lee, HW., Min, S.K., Ju, YS. et al. Prognostic Significance of HLA Class I Expressing in Gastric Carcinoma Defined by Monoclonal Anti-Pan HLA Class I Antibody, EMR8-5. J Gastrointest Surg 15, 1336–1343 (2011). https://doi.org/10.1007/s11605-011-1545-3
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DOI: https://doi.org/10.1007/s11605-011-1545-3