CCL5 and Parkinson disease: To evaluate PD progression, we analyzed changes in parkinsonian behavior scores, global activity, apomorphine-induced rotation behavior, plasma Regulated on Activation, Normal T Cell Expressed and Secreted (RANTES) levels, and positron emission tomography (PET) imaging of dopamine transporters (DATs) using 18F-FP-CIT before/after left ICA infusion of MPTP.