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IgM participation in tumor rejection by immunized mice

L Bellelli, A Nista, M L Sezzi

    Tumori
    |January 1, 1977
    PubMed

    IgG and IgM participation in tumor rejection was studied in DBA/2 mice immunized against L1210 leukemia and in Swiss mice immunized against Ehrlich adenocarcinoma. In both the systems, IgM globulins seem to be implicated and are present on the cell surface of macrophages, lymphocytes and cancer cells, while IgG globulins are present only on some lymphocytes. IgM are also present in the peritoneal washing fluids (obtained 24 h of the control group. In the former group, protein content is about three times higher than that in the control group, while the relative amount of heavy proteins (18 S) and light proteins (7 S) is quite similar. These observations are discussed, as is the possibility that some complement components as C3 may participate in the reaction.

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