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- W2045822070 abstract "Fifteen primary non-small-cell lung carcinomas (8 adenocarcinomas and 7 squamous-cell carcinomas) were analyzed by multiparameter flow cytometry for their expression of p53 and c-myc proteins. In addition, the fraction of cells staining with the proliferation-associated antibody Ki-67 and DNA ploidy was determined. These 4 biological markers were analyzed in parallel samples from a single-cell suspension made from fresh, frozen biopsies. Thus, the internal relationship between these markers within each tumor-cell population was established. Three different anti-pS3 antibodies were used: PAb 421, PAb 1801 and PAb 240. All 15 tumors were p53-positive with the antibodies PAb 1801 and PAb 240, whereas only 9 were positive as judged by the antibody PAb 421. This indicates that the choice of p53 antibody is not irrelevant. Ten tumors were c-myc-positive; 7 of these were adenocarcinomas. The c-myc-positive tumors had a significantly higher level of p53 expression, judged by PAb 1801 and PAb 240, than c-myc-negative tumors. For PAb 421, there was no difference. We did not find any correlation between Ki-67 staining and expression of p53 and c-myc proteins, either with DNA ploidy, S-phase fraction or histological type. Our study indicates that there might be an association between accumulation of p53 protein and c-myc over-expression in non-small-cell lung cancer, and that this in particular might apply to adenocarcinomas. Furthermore, we show that multiparameter flow cytometry is a powerful tool in the study of the relationship between different markers in a cell population. © 1992 Wiley-Liss, Inc." @default.
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- W2045822070 date "1992-12-02" @default.
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- W2045822070 title "Quantitation of biological tumor markers (p53, c-myc, Ki-67 and DNA ploidy) by multiparameter flow cytometry in non-small-cell lung cancer" @default.
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- W2045822070 doi "https://doi.org/10.1002/ijc.2910520603" @default.
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