Linked Life Data

16328531

Source:http://linkedlifedata.com/resource/pubmed/id/16328531

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2005-12-12
pubmed:abstractText
Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is characterized by degeneration of vascular smooth muscle cells (VSMC) of nearly all tissues studied so far. The clinical phenotype of CADASIL shows great variability. The disease is caused by mutations of the Notch3 gene encoding the transmembrane receptor Notch3, which is expressed predominantly in VSMC. In some patients, neuromuscular symptoms have been described. To investigate the fine structural features of peripheral nerve and muscle biopsy specimens in more cases and greater detail, seven electron microscopically confirmed CADASIL patients showing a variable amount of granular osmiophilic material on the surface of VSMC were included in this study. Pathogenic mutations within the cluster region (exon 3 and 4) of the Notch3 gene were identified in six cases. Degeneration and regeneration of nerve fibers in the sural nerves, studied in four cases, was present, although moderate, in all nerve biopsy specimens, whereas an intramuscular nerve fascicle showed more severe changes. Enlarged mitochondria with needle-like calcium precipitates were repeatedly seen. In muscle biopsy specimens, some degree of neurogenic atrophy was apparent in addition to myopathic changes, including occasional ragged red fibers with abnormally large mitochondria, focal tubular aggregates, abnormal terminal cisternae, and myofibrillary abnormalities. Automated sequence analysis of the whole mitochondrial DNA performed in one patient revealed several nucleotide polymorphisms, which were not considered pathogenic. The findings suggest that in CADASIL degeneration of small blood vessels is initiated by defects of the surface membrane of VSMC. Dysfunction of these blood vessels may cause low-grade chronic ischemia with secondary hypoxidosis and a large variety of structural changes noted in skeletal muscle and peripheral nerves, although a primary influence of the underlying genetic defect can not be excluded.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0001-6322
pubmed:author
pubmed:issnType
Print
pubmed:volume
110
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
587-99
pubmed:dateRevised
2007-11-9
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Peripheral nerve and skeletal muscle involvement in CADASIL.
pubmed:affiliation
Department of Neuropathology University Hospital, RWTH Aachen, Pauwelsstr. 30, 52074, Aachen, Germany.
pubmed:publicationType
Journal Article