In vitro cytodestruction of human leukemic cells using murine monoclonal antibodies and human complement

D. E. Stepan, R. M. Bartholomew, Tucker W LeBien

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10 Scopus citations

Abstract

We have investigated the ability of murine monoclonal antibodies (MoAb) to lyse human leukemic cells in vitro using human serum as a source of complement (C'). The human C'-fixing ability of 5 of 7 MoAb is documented. Studies with 2 of these MoAb (BA-1 and BA-2) indicated that their human C'-fixing ability and subsequent lysis of leukemic cells was through activation of the classical pathway of C', was independent of donor serum source, and occurred with a number of different target cells. BA-1 and BA-2 could effectively lyse fresh leukemic cells in the presence of 100% human serum, and BA-1 plus human serum could effectively lyse leukemic cells in the presence of a 20-fold excess of normal human bone marrow cells. Our results have potential implications for immunotherapy trials utilizing murine MoAb.

Original languageEnglish (US)
Pages (from-to)1120-1124
Number of pages5
JournalBlood
Volume63
Issue number5
DOIs
StatePublished - 1984

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