期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1981
卷号：78
期号：11
页码：7073-7077
DOI：10.1073/pnas.78.11.7073
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The K562 leukemia cell has properties of self-renewal and pluripotency similar to those of the hematopoietic stem cell. Monoclonal antibodies to K562 cells have been produced by using hybridoma technology. By radioimmunoassay, some anti-K562 cell antibodies also bind to erythrocyte antigens or peripheral blood mononuclear cells; others are more specific for K562 cells. Antibody binding to hematopoietic progenitors was assayed by using the ability of these cells to form colonies in vitro. After exposure of human bone marrow cells to anti-K562 antibodies and complement, myeloid or erythroid colony formation was inhibited. Some of the inhibitory antibodies showed little binding to mature blood cells by radioimmunoassay, immunofluorescence, and complement cytotoxicity, suggesting that they recognize antigens specific to undifferentiated cells. With the fluorescence-activated cell sorter, one inhibitory antibody was shown to stain only 3% of bone marrow cells. Inhibitory anti-K562 antibodies also bind to myelogenous leukemia cells and virus-transformed lymphocytes. Thus, these antibodies appear to recognize antigens shared by normal hematopoietic progenitors, leukemic cells, and transformed lymphocytes.
