The primary objective of this protocol is to access the utility of 18F-DTBZ PET imaging as an in vivo biomarker to monitor neurodegeneration of both PD mouse models and PD patients. Secondary, the investigators will analyze progression rate of genetic-proving PARK8 and PARK6 patients who have homogeneous phenotype and genotype by 18F-DTBZ PET imaging.
Name: 18F-DTBZ
Description: Subjects will receive a single i.v. administration of approximately 10 mCi 18F-FP-(+)-DTBZ (10 nmole FP-(+)-DTBZ) immediately prior to each scan. The proposed dose for this study is based on our phase I study. At the proposed human dose of 10 mCi, the whole body effective dose (ED) will be approximately 680 mrem. The estimated human ED is expected to be comparable to or below the range of other approved brain imaging agents, such as 18F-FDG.Type: Drug18F-DTBZ for Parkinson's Disease
Description: The annual decline rate of striatal 18F-DTBZ SUVRs (specific uptake value ratios) in PD patients carrying LRRK2 G2385R mutation, PARK6 patients, and patients with idiopathic PD, respectively.
Measure: To calculate the decline rate of striatal 18F-FP-(+)-DTBZ binding and to evaluate whether the degenerative rate differs between idiopathic PD patients and genetic-proving PARK6/PARK8 patients Time: 2 yearsDescription: To analyze the correlation between 18F-FP-(+)-DTBZ annual decline rate and the progression rate of clinical motor scores/non-motor scores/ neuropsychiatric tests in each group. Furthermore, to access the utility of 18F-DTBZ PET imaging as an in vivo biomarker to monitor neurodegeneration in PD patients.
Measure: To analyze the correlation between decline rate of 18F-FP-(+)-DTBZ uptake and clinical severity, and access the feasibility of 18F-DTBZ PET imaging as an in vivo biomarker to monitor neurodegeneration in PD Time: 1 yearSingle Group Assignment
There are 3 SNPs
Patients didn't have other mutations that may contribute to the parkinsonism, such as LRRK2 G2019S, LRRK2 R1628P, PARK2, PARK6, and SCA2. --- G2019S ---
The annual decline rate of striatal 18F-DTBZ SUVRs (specific uptake value ratios) in PD patients carrying LRRK2 G2385R mutation, PARK6 patients, and patients with idiopathic PD, respectively.. To analyze the correlation between decline rate of 18F-FP-(+)-DTBZ uptake and clinical severity, and access the feasibility of 18F-DTBZ PET imaging as an in vivo biomarker to monitor neurodegeneration in PD. --- G2385R ---
3. Twenty PD patients were proved carrying LRRK2 G2385R mutation by our genetic laboratory. --- G2385R ---
Parkinson's Disease Parkinson Disease Parkinsonian Disorders Nerve Degeneration Total of 60 patients, 20 LRRK2 G2385R, 20 PARK6, and 20 idiopathic PD, will be recruited. --- G2385R ---
Patients didn't have other mutations that may contribute to the parkinsonism, such as LRRK2 G2019S, LRRK2 R1628P, PARK2, PARK6, and SCA2. --- G2019S --- --- R1628P ---