TO INVESTIGATE THE SERUM SUBSTANTIA NIGRA NEURON AUTOANTIBODY AND ITS EFFECT IN THE PATIENTS WITH PARKINSON DISEASE (PD), SUBSTANTIA NIGRA SLICES AND A RAT MODEL OF INJECTION OF SERUM FROM PD PATIENTS IN UNILATERAL SIDE SUBSTANTIA NIGRA WERE APPLIED. THE RESULTS SHOWED THAT THE POSITIVE RATE OF SUBSTANTIA NIGRA NEURON AUTOANTIBODY IN PD PATIENTS WAS SIGNIFICANTLY HIGHER THAN IN THE HEALTHY CONTROL GROUP (36.67%VS 6.67%, P