In vitro chemosensitivities of human tumor stem cells to the phase II drug 4'-(9-acridinylamino)methanesulfon-m-anisidide and prospective in vivo correlations

Frederick R. Ahmann, Frank L. Meyskens, Thomas E. Moon, Brian G.M. Durie, Sydney E. Salmon

Research output: Contribution to journalArticle

22 Scopus citations


A potential application of the human tumor stem cell colony assay is to guide Phase II clinical investigations by identifying classes of tumors (or individual patients) which are sensitive in vitro to a new antitumor compound. We have tested human tumor stem cells from 140 tumor biopsies representing 20 different tumor types for chemosensitivity to the Phase II drug 4’-(9-acridinylamino)methanesulfon-rr7-anisidide. In vitro sensitivity was defined as a reduction in the number of tumor colony-forming cells to 30% of the control or less after a 1 -hr exposure to one-tenth of the pharmacologically achievable plasma concentration of 4'-(9-acridinylamino)methanesulfon-m-anisidide. In vitro sensitivity was found in 29 cases: non-Hodgkin’s lymphoma (2 of 2); cervical carcinoma (1 of 1); sarcoma (3 of 6); neuroblastoma (1 of 2); acute myelogenous leukemia (6 of 16); chronic myelogenous leukemia (1 of 3); melanoma (8 of 34); uterine carcinoma (1 of 5); lung carcinoma (1 of 9); ovarian carcinoma (4 of 36); and breast carcinoma (1 of 11). Prospective in vitro-in vivo correlations in eight patients with various tumor types showed that three of three patients sensitive in vitro to 4’-(9-acridmylamino)methanesulfon-m-anisidide responded in vivo, while five of five patients resistant in vitro had no clinical response. The results provide support for further evaluation of the utility of the human tumor stem cell colony assay for targeting Phase II clinical trials.

Original languageEnglish (US)
Pages (from-to)4495-4498
Number of pages4
JournalCancer Research
Issue number11
StatePublished - Nov 1 1982


ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this