Replication and cytolysis of an E1B-attenuated adenovirus in drug-resistant ovarian tumour cells is associated with reduced apoptosis Academic Article uri icon


MeSH Major

  • Adenoviridae
  • Adenovirus E1B Proteins
  • Apoptosis
  • Genetic Therapy
  • Ovarian Neoplasms


  • Therapeutic approaches which are effective in tumour cells resistant to conventional chemotherapy would be of value. An E1B 55 kDa-deleted adenovirus (ONYX-015) induces lysis in cells with mutant p53, although the specificity of these observations for different cell types is unclear. We have used a matched set of drug-resistant human ovarian tumour cell lines to examine the potential of ONYX-015 for preferential replication and lysis of drug-resistant ovarian tumour cells with documented alterations in p53 function. Marked preferential replication of ONYX-015 is observed after infection of mutant p53 transfectant and cisplatin-resistant derivatives, compared to the wild-type p53 expressing parental A2780 line. Infection causes increased cytopathic effects in vitro and inhibition of tumour growth in vivo of the drug-resistant derivatives, but not the parental line. In apparent contrast, increased apoptosis and reduced clonogenic survival is induced by ONYX-015 infection of the chemosensitive parental cell line. ONYX-015 induces increased pro-apoptotic BAX and reduced anti-apoptotic BCLX(L) in parental cells, but not in the resistant derivative A2780/cp70. We propose that induction of apoptosis is one factor which prevents ONYX-015 spread and cytolysis after infection of chemosensitive cells, while it is the failure to engage apoptosis in drug-resistant cells that allows preferential viral replication, spread and cytolysis.

publication date

  • April 7, 2001



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.1038/

PubMed ID

  • 11313813

Additional Document Info

start page

  • 369

end page

  • 75


  • 8


  • 5