Abstract：
:Anti-idiotypic monoclonal antibodies (MoAbs) were prepared in a syngeneic system against anti-carcinoembryonic antigen (CEA) MoAb 5B3 (IgG1), which reacted with a carbohydrate moiety on CEA, and MoAb MA208 (IgG1), which reacted with a peptide on CEA. Anti-idiotypic MoAb T3-503 and T4-202 recognized the private idiotype of MoAb 5B3; anti-idiotypic MoAb M7-049 and M7-625 did so for MoAb MA208. Idiotype mapping showed that MoAb 5B3 has at least two distinct idiotopes at its combining site and MoAb MA208 also has two. Four different anti-idiotypic MoAbs (Ab2) could induce anti-anti-idiotypic antibodies (Ab3) specific to their respective immunizing anti-idiotypic MoAbs. Anti-anti-idiotypic MoAb M7-625 antiserum (at least a part of the antibodies) have the same reactivity as MoAb MA208, since the serum competed with the binding of MoAb MA208 against CEA and contained the antibody population reactive with purified CEA in immunoblotting assay. These results suggest that anti-idiotypic MoAb M7-625 bears the internal image of the antigen (CEA) and induces the anti-anti-idiotypic antibodies specific to CEA. Therefore, an anti-idiotypic antibody bearing the internal image of a tumor associated antigen might be used as a possible tool for vaccination or immunotherapy against malignant tumors as an antigen specific immunomodulator.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Tsujisaki M,Imai K,Tokuchi S,Hanzawa Y,Ishida T,Kitagawa H,Hinoda Y,Yachi Asubject
Has Abstractpub_date
1991-05-15 00:00:00pages
2599-604issue
10eissn
0008-5472issn
1538-7445journal_volume
51pub_type
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