Bacteria Used to <br />Destroy Cancer Tumors <br />in Mice The study was published <br />in the journal Nature Medicine. Scientists genetically <br />reprogrammed bacteria <br />to create "nanobodies." Nanobodies can be thought <br />of as small, more potent <br />versions of antibodies. Antibodies attach to <br />proteins on cancer cells to <br />help the immune system <br />recognize the cells as dangerous. Bacteria use cancer cells <br />to colonize and as protection <br />from the human immune system. The modified bacteria <br />were injected into tumors, <br />and then began to multiply and <br />produce the tumor fighting nanobodies. The bacteria also "uncloaked" <br />the cancer cells, engaging <br />the immune system in the <br />fight against the tumors. If the method works in humans, <br />scientists are hopeful that it <br />could treat cancer "more precisely"<br />without harmful drug side effects.