Genetically modified microbes release "nanobodies" that alert the immune system to cancer in mice, scientists report.

Scientists have used genetically reprogrammed bacteria to destroy tumours in mice. The innovative method one day may lead to cancer therapies that treat the disease more precisely, without the side effects of conventional drugs.

The researchers already are scrambling to develop a commercial treatment, but success in mice does not guarantee that this strategy will work in people. Still, the new study, published Wednesday in the journal Nature Medicine, is a harbinger of things to come, said Dr. Michael Dougan, an immunologist at Massachusetts