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Researchers hope that a person who has so far lived for a week with a genetically modified pig heart will provide a trove of data on the possibilities of xenotransplantation. Researchers hope that a person who has so far lived for a week with a genetically modified pig heart will provide a trove of data on the possibilities of xenotransplantation. Surgery being performed of the heart transplant

By most standards, the increasing availability of life-saving antibiotics in the developing world is a good thing. But, around the globe, overuse of these drugs has created resistant strains of deadly bacteria - and they could be a greater threat in poorer nations than in richer ones, owing in part to a lack of regulation.

From predatory microbes to toxic metals, nature is inspiring new ways to treat infections.

Two teams funded by the US military's research arm, the Defense Advanced Research Projects Agency (DARPA), have begun preliminary trials of 'closed-loop' brain implants that use algorithms to detect patterns associated with mood disorders.DARPA is supporting Chang's group and another at Massachusetts General Hospital (MGH) in Boston, with the eventual goal of treating soldiers and veterans who have depression and post-traumatic stress disorder.Wayne Goodman, a psychiatrist at Baylor College of Medicine in Houston, Texas, hopes that closed-loop stimulation will prove a viable long-term treatment for mood disorders - partly because the latest generation of algorithms is more personalized and based on physiological signals, rather than a physician's judgement.

Reports of deaths potentially linked to the treatment have cast a shadow on what many hail as a landmark approval. Reports of deaths potentially linked to the treatment have cast a shadow on what many hail as a landmark approval.

In 2012, Shoichet and researchers at the Novartis Institutes for BioMedical Research in Cambridge, Massachusetts, developed an algorithm that predicts side effects on the basis of similarities between drugs' chemical structures.