Alteration of plasma membrane of drug-resistant tumor cells: 230-Kilodalton protein identified by monoclonal antibody

Yoshikazu Sugimoto, Hideo Suzuki, Nobuo Tanaka

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19 Citations (Scopus)


A number of hybridomas producing antibodies to plasma membrane of an aclarubicin-resistant subline of L5178Y cells were obtained. Among the hybridoma antibodies, one was found by agglutination tests to react with the aclarubicinresistant cell line, but not significantly with the parental and adriamycin-, bleomycin- and macromomycin-resistant cell lines. The monoclonal antibody was designated SC438, and showed complement-dependent cytolytic activity more markedly against the aclarubicin-resistant cells than against the parental cells. Fluorographs of [14C] leucine-labeled aclarubicin-resistant cells demonstrated two protein bands of 230k and 20k daltons, which were precipitated by the SC438 antibody. The former seemed to be specific for the aclarubicin-resistant cells.

Original languageEnglish
Pages (from-to)969-975
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number3
Publication statusPublished - 1983 Aug 12


ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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