Researchers find way to make tumor cells easier to destroy

The researchers tested three compounds, and one, GRN163L, more strongly inhibited telomerase than the others. Many groups are studying GRN163L as an anticancer therapeutic, and it recently received clearance by the U.S. Food and Drug Administration to enter human phase I/II clinical testing in chronic lymphocytic leukemia. In some preliminary studies, GRN163L has been shown to be additive when used in combination with existing cancer drugs or radiation.

Next, Pandita and colleagues will test the effect of GRN163L on tumors in mice to see if it will enhance the cell-killing effect of hyperthermia and radiation. They are also working to develop chemicals that have heat-like effects to bypass the need to supply a physical heat source to tissue.

Agarwal M, Pandita S, Hunt CR, Gupta A, Yue X, Khan S, Pandita RK, Prat D, Shay JW, Taylor JSA, Pandita TK. Inhibition of telomerase activity enhances hyperthermia-mediated radiosensitization. Cancer Research 2008;68: May 1, 2008.

Funding from National Institutes of Health and the National Aeronautics and Space Administration supported this research.

Washington University School of Medicine's 2,100 employed and volunteer faculty physicians also are the medical staff of Barnes-Jewish and St. Louis Children's hospitals. The School of Medicine is one of the leading medical research, teaching and patient care institutions in the nation, currently ranked third in the nation by U.S. News & World Report. Through its affiliations with Barnes-Jewish and St. Louis Children's hospitals, the School of Medicine is linked to BJC HealthCare.

Siteman Cancer Center is the only federally-designated Comprehensive Cancer Center within a 240-mile radius of St. Louis. Siteman Cancer Center is composed of the combined cancer research and treatment programs of Barnes-Jewish Hospital and Washington University School of Medicine. Siteman has satellite locations in West County and St. Peters, in addition to its full-service facility at Washington University Medical Center on South Kingshighway.