Journal
INTERNATIONAL JOURNAL OF HEMATOLOGY
Volume 89, Issue 5, Pages 656-663Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s12185-009-0320-7
Keywords
Leukemia; B cell; Chronic; Costimulatory; B7; Expression; Interferon-gamma
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Funding
- National Natural Science Foundation of China [30471937]
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Malignant monoclonal B cells of chronic B cell lymphocytic leukemia (B-CLL) usually fail to be cleared, which indicates important costimulatory molecules may be lacking. Among those costimulatory signals, B7-1/CD80 and B7-2/CD86 caused utmost attention. In this study, B7-1 and B7-2 expression on B cells in chronic B cell lymphocytic leukemia patients were detected. Data showed that B7-2 expression in chronic B cell lymphocytic leukemia patients is significantly lower than in normal people, which suggests defective B7-2 expression may be one of the pathogenic mechanisms of chronic B cell lymphocytic leukemia. Further, we confirmed interferon-gamma could induce B7-2 expression slightly and promote T-cell response against chronic B cell lymphocytic leukemia cells, indicating interferon-gamma has clinical value in chronic leukemia immunotherapy based on modulating B7-2 expression.
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