Analysis of K-ras, p53, bcl-2 and Rb expression in non-small cell lung cancer cell lines

M. Loprevite, L. Varesco, R. Favoni, G. B. Ferrara, F. Moro, L. Ottaggio, G. Fronza, P. Campomenosi, A. Abbondandolo, G. Cutrona, S. Roncella, A. Albini, M. G. Aluigi, S. Pozzi, C. Pera, R. Biticchi, V. Gismondi, F. Grossi, M. C. Pennucci, A. Ardizzoni

Research output: Contribution to journalArticlepeer-review


Six non-small cell lung cancer (NSCLC) cell lines (A-549, Ca-Lu-6, SK- Lu-1, Ca-Lu-1, SK-Mes-1 and LX-1) were studied to assess the presence of multiple concomitant alterations of different oncogenes (K-ras, bcl-2) and tumor suppressor genes (p53, Rb) in NSCLC. K-ras (exon 1) and p53 (exons 5- 8) gene mutations were determined via a PCR-based-DGGE (Denaturing Gradient Gel Electro-phoresis) and by sequencing approach. Different mutations were found in the 1st exon of K-ras gene in 5 of 6 cell lines examined. Five of six cell lines contained K-ras mutations at codon 12 (A-549, SK-Lu-1, LX-1) or codon 13 (SK-Mes-1, Ca-Lu-1). In addition, 5 of 6 cell lines showed p53 mutations of exon 8 (SK-Mes-1, Ca-Lu-1 cod. 280; LX-1 cod. 273) or exon 6 (Ca-Lu-6 cod. 196; SK-Lu-1 cod. 193). In 4 of these cell lines, p53 protein nuclear expression was also confirmed with DO-7 mAb immunocytochemistry. Expression of cytoplasmic bcl-2 protein, by anti-bcl-2 mAb flow cytometric analysis, was found in A-549, Ca-Lu-1, SK-Lu-1, SK-Mes-1 cell lines. In contrast, RT-PCR analysis of Rb gene could not identify any change in the cell lines examined. In conclusion, most NSCLC cell lines tested displayed concomitant multiple oncogene/tumor suppressor gene alterations.

Original languageEnglish
Pages (from-to)1203-1208
Number of pages6
JournalInternational Journal of Oncology
Issue number6
Publication statusPublished - 1997


  • Bcl-2
  • K-ras
  • Non-small cell lung cancer
  • P53
  • Rb

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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