Pig cells implanted into human brains to treat Parkinson's
New Zealand-based researchers are studying effects of implanting pig brain cells into brains of people suffering from Parkinson's disease. Parkinson's is an incurable disease which causes degeneration of body movements due to gradual loss of brain cells. Pig cells' capsules were implanted in four people to slow further loss of brain cells which showed improvements, maintained over 18 months. 