Pig brain cells wrapped in a seaweed derivative could be implanted into human brains by next year to treat Huntington’s disease, if approved. Researchers at New Zealand’s Living Cell Technologies in Auckland have already had good results in monkeys. They told New Scientist they were seeking approval to do the same in humans in the US. The Food and Drugs Administration has already approved trials with animal tissue for Parkinson’s disease. However, there is concern that using animal cells in humans could spread infections from animals to humans.