"Parkinson's disease occurs when neurons that produce dopamine die. Dopamine is a neurochemical that allows the body to move with smooth coordination. When 80 percent of the neurons that produce dopamine die off, the motor symptoms of Parkinson's disease appear."

"Now, a Canadian team has found evidence that neuronal death occurs when a cellular enzyme called Prx2 is injured. The enzyme plays a key role in eliminating the potentially damaging products of mitochondria, the cells' power plants. Without the enzyme, these products build up and threaten the cell. "

", researchers at the Ottawa Health Research Institute, in Ontario, studied mice in which a mitochondria-affecting toxin is used
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