Methylator resistance mediated by mismatch repair deficiency in a glioblastoma multiforme xenograft

Henry S. Friedman, Stewart P. Johnson, Qing Dong, S. Clifford Schold, B. K.Ahmed Rasheed, Sandra H. Bigner, Francis Ali-Osman, Eileen Dolan, O. Michael Colvin, Peter Houghton, Glen Germain, James T. Drummond, Stephen Keir, Susan Marcelli, Darell D. Bigner, Paul Modrich

Research output: Contribution to journalArticle

127 Scopus citations


A methylator-resistant human glioblastoma multiforme xenograft, D-245 MG (PR), in athymic nude mice was established by serially treating the parent xenograft D-245 MG with procarbazine. D-245 MG xenografts were sensitive to procarbazine, temozolomide, N-methyl-N-nitrosourea, 1,3-bis(2-chloroethyl)- 1-nitrosourea, 9-aminocamptothecin, topotecan, CPT-11, cyclophosphamide, and busulfan. D-245 MG (PR) xenografts were resistant to procarbazine, temozolomide, N-methyl-N-nitrosourea, and busulfan, but they were sensitive to the other agents. Both D-245 MG and D-245 MG (PR) xenografts displayed no O6-alkylguanine-DNA alkyltransferase activity, and their levels of glutathione and glutathione-S-transferase were similar. D-245 MG xenografts expressed the human mismatch repair proteins hMSH2 and hMLH1, whereas D-245 MG (PR) expressed hMLH1 but not hMSH2.

Original languageEnglish (US)
Pages (from-to)2933-2936
Number of pages4
JournalCancer Research
Issue number14
StatePublished - Jul 15 1997


ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Friedman, H. S., Johnson, S. P., Dong, Q., Schold, S. C., Rasheed, B. K. A., Bigner, S. H., Ali-Osman, F., Dolan, E., Colvin, O. M., Houghton, P., Germain, G., Drummond, J. T., Keir, S., Marcelli, S., Bigner, D. D., & Modrich, P. (1997). Methylator resistance mediated by mismatch repair deficiency in a glioblastoma multiforme xenograft. Cancer Research, 57(14), 2933-2936.