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

机译:肺恶性肿瘤中的表皮生长因子受体。癌症与正常组织之间的比较。

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摘要

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.
机译:表皮生长因子受体(EGFr)使用放射性配体结合测定法在来自51个人类非小细胞肺癌的膜制剂以及相同患者的正常组织中进行测量。 EGFr的结合特征在肿瘤和正常肺膜中相似(高亲和力位点的解离常数范围:0.1-0.6 nM)。但是,肿瘤中的浓度(蛋白质的中位数为16.4 fmol mg-1;范围为1.5-176)显着高于正常组织中的浓度(蛋白质的中位数为7.4 fmol mg-1;范围为1.9-13.4)。正常组织中的受体水平呈正态分布。因此有可能确定正常/病理的临界水平(12.9 fmol mg-1的蛋白质)。在57%的病例中,癌症中的EGFr高于临界值。受体浓度和EGFr阳性率与组织学,分期,淋巴结阳性和pT之间没有关系。发现了受体阳性与分级之间直接关系的趋势。

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