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. 1991 Oct;64(4):741–744. doi: 10.1038/bjc.1991.390

Epidermal growth factor receptor in lung malignancies. Comparison between cancer and normal tissue.

R Dittadi 1, M Gion 1, V Pagan 1, A Brazzale 1, O Del Maschio 1, A Bargossi 1, A Busetto 1, G Bruscagnin 1
PMCID: PMC1977711  PMID: 1654986

Abstract

Epidermal growth factor receptors (EGFr) were measured using a radioligand binding assay, in membrane preparations from 51 human non-small cell lung cancers and in normal tissue of the same patients. The binding characteristics of EGFr were similar in tumour and normal lung membranes (range of dissociation constant of high affinity sites: 0.1-0.6 nM). However, the concentrations in tumours (median, 16.4 fmol mg-1 of protein; range, 1.5-176) were significantly higher than in normal tissues (median, 7.4 fmol mg-1 of protein; range, 1.9-13.4). The receptor levels in normal tissue were normally distributed. It was therefore possible to define a normal/pathologic cut-off level (12.9 fmol mg-1 of protein). In 57% of cases EGFr in cancer was higher than the cut-off. No relationships were found between receptor concentrations and positivity rates of EGFr and histology, stage, lymph node positivity and pT. A trend for a direct relation between receptor positivity and grading was found.

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Selected References

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