Aberrant methylation and simian virus 40 tag sequences in malignant mesothelioma

S. Toyooka, H. I. Pass, N. Shivapurkar, Y. Fukuyama, R. Maruyama, K. O. Toyooka, M. Gilcrease, A. Farinas, J. D. Minna, A. F. Gazdar

Research output: Contribution to journalArticlepeer-review

129 Scopus citations


Aberrant promoter methylation and resultant silencing of several genes plays an important role in the pathogenesis of many tumor types. We compared the methylation profile of 66 malignant mesotheliomas (MMs) and 40 lung adenocarcinomas using methylation-specific PCR for seven genes frequently methylated in lung cancer. We also compared the methylation frequencies of these genes as well as the methylation index, a reflection of all of the gene frequencies, with the presence of SV40 large T-antigen (Tag) sequences, histological subtype, and patient survival. Our major findings are: (a) with the exception of the RASSF1A promoter of the RASSF1 gene, frequencies of aberrant methylation were significantly lower in MMs than in adenocarcinomas; (b) the frequency of RASSF1A aberrant methylation and the value of the methylation index were significantly higher in SV40 sequence positive MM than in negative MM; and (c) the methylation index was higher in epithelial MM than in sarcomatous/mixed MM. Our results demonstrate a relationship between SV40 and aberrant methylation in MMs.

Original languageEnglish (US)
Pages (from-to)5727-5730
Number of pages4
JournalCancer research
Issue number15
StatePublished - Aug 1 2001

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


Dive into the research topics of 'Aberrant methylation and simian virus 40 tag sequences in malignant mesothelioma'. Together they form a unique fingerprint.

Cite this