Somatic Cell and Molecular Genetics
Volume 11, Number 5, 517-522, DOI: 10.1007/BF01534847

Brief Communication

Selection of variant neuroblastoma cell line which has lost cell surface expression of antigen detected by monoclonal antibody PI153/3

Josef Bukovsky, Audrey Evans, Margaret Tartaglione and Roger H. Kennett

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Abstract

A variant of the human neuroblastoma cell line, IMR-5, was selected by a series of treatments with the monoclonal antibody PI153/3 and complement. The variant, M-1, was not reactive by either cytotoxicity or binding assays with the PI153/3 antibody or with two other monoclonal antibodies that were selected on the basis of their inhibition of PI153/3 binding. Although no antigen could be detected on the cell surface or in the supernatant of the variant cell line, a reduced level of binding could be detected in M1 cell extracts compared to extracts of IMR5. The variant cell line did not differ from IMR5 in its sensitivity in lysis by other antibodies, in its lack of expression of HLA antigens, or in its capacity to form tumors in nude mice.

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