Cells to produce their own anti-cancer medication?

Instapundit links to a story about a new way to fight cancer. It was done at Johns Hopkins in Baltimore. I wonder if they used Henrietta Lacks' cells (Johns Hopkins is where her cells were first put in a petrie dish). Anyway, researchers there say they have devised a protein “switch” that instructs cancer cells to produce their own anti-cancer medication.
Read about it here: http://www.kurzweilai.net/protein-switches-could-turn-cancer-cells-into-tiny-chemotherapy-factories
Here is the link to Instapundit: http://pajamasmedia.com/instapundit/