Linked Life Data

15090472

Source:http://linkedlifedata.com/resource/pubmed/id/15090472

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 6
pubmed:dateCreated
2004-5-28
pubmed:abstractText
To investigate striatal and cortical pre- and postsynaptic dopaminergic function in parkin-linked parkinsonism, 13 unrelated patients homozygous or compound heterozygous for parkin mutations were studied with [(18)F]dopa and [(11)C]raclopride (RAC) PET. Data were compared with a young-onset Parkinson's disease (YOPD) cohort, matched for age, disease severity and duration, but negative for parkin mutations. Significant changes in [(18)F]dopa uptake and RAC binding potential (BP) were localized in striatum using regions of interest (ROIs) and throughout the entire brain volume with statistical parametric mapping (SPM). As expected, both YOPD and parkin patients showed significant decreases in striatal [(18)F]dopa uptake; however, in parkin patients, additional reductions in caudate and midbrain were localized with SPM. The RAC-BP was significantly decreased in striatal, thalamic and cortical areas (temporal, orbito-frontal and parietal cortex) in parkin compared with YOPD patients. Our [(18)F]dopa PET findings suggest that, compared with YOPD, parkin disease is associated with more severe and widespread presynaptic dopaminergic deficits. The global decreases in D2 binding found in parkin compared with YOPD patients could be a direct consequence of the parkin genetic defect itself or a greater susceptibility to receptor downregulation following long-term dopaminergic agent exposure. Cortical reductions in D2 binding may contribute to the behavioural problems reported in parkin patients.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0006-8950
pubmed:author
pubmed:issnType
Print
pubmed:volume
127
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1332-42
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Striatal and cortical pre- and postsynaptic dopaminergic dysfunction in sporadic parkin-linked parkinsonism.
pubmed:affiliation
MRC Clinical Science Centre and Division of Neuroscience, Faculty of Medicine, Imperial College, Hammersmith Hospital, Hammersmith Hospital, Du Cane Road, London W12 0NN, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't