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Onset-related subtypes of Parkinson's disease differ in the patterns of striatal dopaminergic dysfunction: A positron emission tomography study.

Abstract：

PURPOSE:The young-onset subtype of Parkinson's disease (YOPD) differs from the late-onset subtype (LOPD) in drug responsiveness, incidence of motor complications, and prognosis. The pathophysiology underlying these differences remains largely unknown. This study investigated whether the two subtypes differ in the pattern of dysfunction in striatal (caudate and putamen) dopaminergic system and if the dopamine transporter (DAT) imaging patterns are associated with the clinical features of corresponding PD subtype. METHODS:We assessed the spatial pattern of striatal dopaminergic dysfunction in 40 YOPD and 47 LOPD with early to mid-stage PD with DAT imaging by positron emission tomography. Two sub-regional parameters (caudate/putamen ratio and asymmetry index) were calculated to measure the spatial pattern of striatal dopaminergic dysfunction. RESULTS:The caudate/anterior putamen ratios were significantly higher in YOPD than that in the LOPD (P = 0.03 contralateral to the most affected side of the body and P = 0.004 ipsilateral), which was supported by significantly inverse correlations between age of onset and caudate/anterior putamen ratios (r = -0.428, P < 0.001 for the contralateral and r = -0.576, P < 0.001 for the ipsilateral). Sub-regional DAT binding in caudate ipsilateral to affected limbs was significantly correlated with age, while DAT bindings in putamen were significantly inversely correlated with disease duration and UPDRS motor scores. CONCLUSION:The YOPD subtype suffers from an uneven pattern of dopaminergic dysfunction: more sparing of the caudate compared with the putamen, while the LOPD patients is with a relatively uniform pattern.

journal_name

Parkinsonism Relat Disord

journal_title

Parkinsonism & related disorders

authors

Liu SY,Wu JJ,Zhao J,Huang SF,Wang YX,Ge JJ,Wu P,Zuo CT,Ding ZT,Wang J

doi

10.1016/j.parkreldis.2015.10.017

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

1448-53

issue

12

eissn

1353-8020

issn

1873-5126

pii

S1353-8020(15)30018-3

journal_volume

21

pub_type

杂志文章

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