Linked Life Data

17335909

Source:http://linkedlifedata.com/resource/pubmed/id/17335909

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2007-4-2
pubmed:abstractText
A proportion of patients with myasthenia gravis (MG) do not have antibodies to the acetylcholine receptor (AChR). Some of these patients have antibodies to muscle specific kinase (MuSK), whereas others have neither antibody (seronegative MG, SNMG). Both MuSK antibody positive MG (MuSK-MG) and SNMG are antibody-mediated diseases but how they cause neuromuscular junction failure is not clear. One possibility is that they reduce the clustering and expression of AChRs. We looked at the effects of MuSK-MG and SNMG sera/IgG on surface AChR distribution and expression, and AChR subunit and MuSK mRNA by quantitative RT-PCR, in TE671 and C2C12 myotubes. In TE671 cells MuSK-MG sera reduced AChR expression by about 20%, but had no effect on AChR subunit or MuSK mRNA expression. In C2C12 myotubes, MuSK-MG sera caused a reduction in the number of agrin-induced clusters, but the clusters became larger and there was no significant effect on total surface AChR numbers or AChR subunit or MuSK mRNA. By contrast, SNMG sera not only reduced AChR numbers by about 20% in TE671 cells, but modestly upregulated AChR gamma subunit expression in TE671 cells and both AChR gamma subunit and MuSK expression in C2C12 myotubes. Thus, although these results have, disappointingly, demonstrated little effect of MuSK antibodies on AChR expression, they do imply that SNMG antibodies act on AChR-associated pathways.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0165-5728
pubmed:author
pubmed:issnType
Print
pubmed:volume
185
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
136-44
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Effect of sera from AChR-antibody negative myasthenia gravis patients on AChR and MuSK in cell cultures.
pubmed:affiliation
Neurosciences Group, Weatherall Institute of Molecular Medicine, Department of Clinical Neurology, University of Oxford, UK.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't