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- W2051431808 abstract "In order to identify potential markers of malignancy in diagnostic respiratory cytopathology, c-myc and c-erbB-2 proto-oncogene expression was studied in fine needle aspirates from 14 consecutive fresh operation tissue samples (after surgical removal) representing lung tumors and a variety of other cell samples by in situ hybridization of 35S-labeled antisense and sense RNA c-myc and c-erbB-2 specific proto-oncogene probes. All 14 lung tumors showed c-myc expression and eight also showed c-erbB-2 expression. On average, the c-myc expression was about 4 times higher than that of c-erbB-2 (P less than 0.001). c-erbB-2 expression, confirmed also as a cytoplasmic membrane-bound reactivity by immunohistochemical stainings for c-erbB-2 oncoprotein, was significantly related to adenocarcinoma (P less than 0.025), whereas increasing tumor size correlated significantly with increasing c-myc expression (P less than 0.05). On average, all the tumor cell lines showed 2-fold expression of c-myc compared with the lung tumors (P less than 0.025). c-erbB-2 expression was found in six of 11 cell lines. High c-myc proto-oncogene expression was also found in broncho-epithelial cells and alveolar macrophages, and a low expression was found in lymphocytes but not in neutrophils, while none of these cells showed c-erbB-2 proto-oncogene expression. Our results demonstrate extensive c-myc proto-oncogene expression in both malignant and non-neoplastic proliferating cells, but not in terminally differentiated cells such as neutrophils. Therefore c-myc expression must also be related to general cell proliferation and not only malignancy per se. In marked contrast, c-erbB-2 proto-oncogene expression was found only in adenocarcinoma cells, and thus can be used as a marker for malignancy in diagnostic respiratory cytopathology." @default.
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- W2051431808 date "1992-09-01" @default.
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- W2051431808 title "Evidence by <i>In Situ</i> Hybridization that <i>c-erbB-2</i> Proto-oncogene Expression Is a Marker of Malignancy and Is Expressed in Lung Adenocarcinomas" @default.
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- W2051431808 doi "https://doi.org/10.1165/ajrcmb/7.3.325" @default.
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