Immortalization of murine B cells in vitro with oncogene-containing retroviral vectors. |
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Authors: | K H Grabstein B Hess K E Weisser L Clark R Goodwin R W Overell |
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Institution: | Immunex Corporation, Seattle, WA 98101. |
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Abstract: | A large panel of oncogene-containing retroviral vectors has been constructed and used to infect activated murine splenic B cells to determine whether particular oncogenes are capable of directly mediating B cell immortalization. Mature B cell lines have been consistently established with some of these retroviral vectors. These B cell lines arose at a low frequency, indicating that more genetic events were required in addition to infection with the retroviral vector for immortalization to occur. All such lines were LPS-dependent and non-tumorigenic. All lines secrete IgG and express surface IgG, but not IgD or IgM. In addition, they are CD11b+ and CD23-. These cells may be derived from the CD5 "lineage" or a related B cell subset and appear to be more susceptible to immortalization than conventional B cells. |
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