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J Immunol Methods. 1998 Jun 1;215(1-2):95-104.

Immunochemical approaches to AGE-structures: characterization of anti-AGE antibodies.

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Department of Biochemistry, Kumamoto University, School of Medicine, Honjo, Japan.


Recent immunological approaches have greatly helped broaden our understanding of the biomedical significance of advanced glycation end products (AGEs) in aging and age-enhanced disease processes. Recently, Nepsilon-(carboxymethyl) lysine (CML), one of the glycoxidation products of AGEs, was demonstrated to be a major immunological epitope among AGEs. In the subsequent study, we characterized 13 different polyclonal anti-AGE antibodies and showed that these antibodies could be classified into three groups (Groups I, II and III). Group I was specific for CML and both Group II and Group III were specific for other epitopes (non-CML). Time-course study suggested that the epitope of Group II was formed earlier than that of Group III. In the present study, we prepared two monoclonal anti-AGE antibodies (2A2 and 3A3) whose epitope structures appeared to be closely related to Group III and Group II, respectively. The result indicates that AGE-proteins express at least two major non-CML epitopes.

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