Engineered Stem Cells Can Home In On Tumors And Deliver Drug Payload In Mice

Researchers at The University of Texas M. D. Anderson Cancer Center have perfected a delivery system for anticancer treatment that zeroes in on a tumor and becomes part of its supporting tissue. This new “cellular vehicle” then pumps drugs directly into cancer cells to disable them, but leaves normal tissue alone.
http://www.sciencedaily.com/releases/2004/11/041103233758.htm