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. 1996 Jun;73(11):1366-72.
doi: 10.1038/bjc.1996.260.

Monoclonal antibody against the fusion junction of a deletion-mutant epidermal growth factor receptor

S Okamoto  1 , K Yoshikawa, Y Obata, M Shibuya, S Aoki, J Yoshida, T Takahashi
Affiliations
Free PMC article

Monoclonal antibody against the fusion junction of a deletion-mutant epidermal growth factor receptor

S Okamoto et al. Br J Cancer. 1996 Jun.
Free PMC article

Abstract

A mouse monoclonal antibody (IgG2b), 3C10, was produced against the truncated epidermal growth factor receptor (EGFR), encoded by the (type III) in-frame deletion mutation of 801 nucleotides of EGFR affecting the external domain, known to be expressed in some human glioblastoma. As this mutation newly generates a glycine residue at the fusion point, a 14 amino acid peptide around the fusion junction including this glycine was chemically synthesised and used for immunisation of (B6 x DBA/2) F1 mice. Flow cytometric analysis showed 3C10 antibody staining of a mouse NIH/3T3 transfectant (ERM5) with the type III EGFR deletion-mutant gene, but not one with wild-type EGFR. The antibody immunoprecipitated the truncated EGFR protein with a molecular mass of approximately 140 kDa from ERM5 cells. Immunostaining of glioblastomas revealed binding in the case with the type III EGFR mutation, the five other specimens without the mutation being negative despite overexpression of EGFR in some cases.

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