
DURHAM, North Carolina- Topoisomerase I inhibitors have shown promising activity in difficult-to-treat tumors of the central nervous system (CNS), according to Henry S. Friedman, MD. In studies of camptothecins, both irinotecan (Camptosar) and topotecan (Hycamtin) showed "prodigious activity" in slowing tumor growth and causing tumor regression in subcutaneous xenografts of human gliomas, Dr. Friedman told those attending the Vanderbilt University Symposium. Dr. Friedman is Jones B. Powell, Jr., Professor of Neuro-Oncology at Duke University Medical Center in Durham, North Carolina.

