Abstract:
:Monoclonal antibodies (MAbs) reactive with the ganglioside fucosyl GM1 (Fuc-GM1), an antigen associated with small-cell carcinoma of the lung (SCLC), were tested for their ability to mediate tumor-cell killing in vitro in conjunction with humoral and cellular effectors and to inhibit tumor engraftment in nude mice in vivo. MAbs F12 and F15, both IgG3k, induced human complement-mediated cytolysis of 3 Fuc-GM1-expressing tumor cell lines: one rat hepatoma cell line, H4-II-E, and 2 human SCLC cell lines, NC1 H69 and NC1 H128. F12 and F15 also induced ADCC of these cell lines in the presence of either murine or human effector cells. Addition of sub-cytolytic amounts of fresh human serum as complement source resulted in enhanced ADCC induced by MAb F12 (IgG3). Also a Fuc-GM1-reactive MAb of IgM isotype, F9, was able to induce such complement-aided ADCC (CADCC). F12 and F15 both proved to effectively inhibit engraftment of H4-II-E tumors in nude mice. A single dose of a modest amount (40 micrograms) of MAb conferred 65 to 100% protection against development of tumors. Our results demonstrate that Fuc-GM1 can act as a target antigen on tumor cells for specific immunotherapy in vitro and in a mouse model in vivo. Complement and murine and human mononuclear effector cells were effective mediators of tumor cytolysis in vitro in the presence of murine Fuc-GM1-reactive MAbs. Our results also suggest that humoral and cellular effectors may co-operate in specific tumoricidal reactions and that these may be induced by antibodies of both IgG and IgM isotypes.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Brezicka FT,Holmgren J,Kalies I,Lindholm Ldoi
10.1002/ijc.2910490619subject
Has Abstractpub_date
1991-12-02 00:00:00pages
911-8issue
6eissn
0020-7136issn
1097-0215journal_volume
49pub_type
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journal_title:International journal of cancer
pub_type: 杂志文章
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journal_title:International journal of cancer
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