Immune cells contribute to the development of Parkinson's disease

Parkinson disease is a neurodegenerative disorder that impairs movement, balance, speech, and other functions. It is characterized by the loss of nerves in the brain that produce a substance known as dopamine. Although the loss of dopamine-containing nerves is accompanied by accumulation of immune cells known as T cells, these accumulating T cells were not thought to have a role in the development of disease.

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