123I-FP-CIT in progressive supranuclear palsy and in Parkinson's disease: a SPECT semiquantitative study.
Department of Biopathology, University "Tor Vergata", Rome, Italy.
BACKGROUND AND AIM: It is still debated whether or not I-FP-CIT single photon emission computerized tomography (SPECT) is able to differentiate between Parkinson's disease and progressive supranuclear palsy (PSP). Our aim was to use SPECT semiquantitative analysis to assess the capacity of I-FP-CIT to characterize Parkinson's disease versus PSP. PATIENTS AND METHODS: Twenty-one Parkinson's disease patients, 15 disease duration- and age-matched PSP patients and 20 age-matched healthy controls were included in this study. SPECT imaging was always performed at 4 h post-injection. The ratios of striatal (S) to non-specific occipital (O) binding for the entire striatum (S/O), caudate nuclei (C/O), putamina (P/O) were calculated in both the basal ganglia. The asymmetric index (AI) for the whole striatum was also calculated for Parkinson's disease and PSP. RESULTS: Compared to healthy controls, S/O, C/O and P/O were significantly reduced (P<0.001) both in Parkinson's disease (-46%, -43%, -49%, contralaterally to the most affected side; -41%, -37%, -41%, ipsilaterally) and in PSP (-58%, -57%, -59%, contralaterally; -58%, -57%, -59%, ipsilaterally). S/O, C/O and P/O ratio values were significantly (P<0.001) lower in PSP patients when compared to Parkinson's disease group. The asymmetric index (AI) was significantly higher (P<0.001) in Parkinson's disease than in PSP (AI: 23.6%+/-15.07% vs. 9.66%+/-5.83), but with an overlap between the two groups. CONCLUSION: Our results confirm that I-FP-CIT SPECT is clinically useful for detecting nigrostriatal degeneration both in Parkinson's disease and PSP. Moreover, in our series, semiquantitative analysis using I-FP-CIT SPECT allowed Parkinson's disease and PSP to be discriminated because PSP patients presented a more severe and symmetric dopamine transporter loss, and the results for S/O were more accurate.
PMID: 16531926 [PubMed - indexed for MEDLINE]
PMID: 16531926 [PubMed - indexed for MEDLINE]
関連論文
- [123I]FP-CIT SPECT shows a pronounced decline of striatal dopamine transporter labelling in early and advanced Parkinson's disease.
- Iodine-123-N-omega-fluoropropyl-2beta-carbomethoxy-3beta-(4-iod ophenyl)tropane SPECT in healthy controls and early-stage, drug-naive Parkinson's disease.
- [Review] SPECT and PET imaging of the dopaminergic system in Parkinson's disease.
- 123I-FP-CIT semi-quantitative SPECT detects preclinical bilateral dopaminergic deficit in early Parkinson's disease with unilateral symptoms.
- Differential patterns of dopamine transporter loss in the basal ganglia of progressive supranuclear palsy and Parkinson's disease: analysis with [(123)I]IPT single photon emission computed tomography.



























