Linked Life Data

21040903

Source:http://linkedlifedata.com/resource/pubmed/id/21040903

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SubjectPredicateObjectContext
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pubmed-article:21040903pubmed:dateCreated2010-11-2lld:pubmed
pubmed-article:21040903pubmed:databankReferencehttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:21040903pubmed:abstractTextThe inherited neurodegenerative disease Friedreich's ataxia (FRDA) is caused by GAA?TTC triplet repeat hyperexpansions within the first intron of the FXN gene, encoding the mitochondrial protein frataxin. Long GAA?TTC repeats cause heterochromatin-mediated gene silencing and loss of frataxin in affected individuals. We report the derivation of induced pluripotent stem cells (iPSCs) from FRDA patient fibroblasts by transcription factor reprogramming. FXN gene repression is maintained in the iPSCs, as are the global gene expression signatures reflecting the human disease. GAA?TTC repeats uniquely in FXN in the iPSCs exhibit repeat instability similar to patient families, where they expand and/or contract with discrete changes in length between generations. The mismatch repair enzyme MSH2, implicated in repeat instability in other triplet repeat diseases, is highly expressed in pluripotent cells and occupies FXN intron 1, and shRNA silencing of MSH2 impedes repeat expansion, providing a possible molecular explanation for repeat expansion in FRDA.lld:pubmed
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pubmed-article:21040903pubmed:authorpubmed-author:LaurentLouise...lld:pubmed
pubmed-article:21040903pubmed:authorpubmed-author:CampauEricaElld:pubmed
pubmed-article:21040903pubmed:copyrightInfoCopyright © 2010 Elsevier Inc. All rights reserved.lld:pubmed
pubmed-article:21040903pubmed:issnTypeElectroniclld:pubmed
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pubmed-article:21040903pubmed:volume7lld:pubmed
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pubmed-article:21040903pubmed:pagination631-7lld:pubmed
pubmed-article:21040903pubmed:dateRevised2011-11-7lld:pubmed
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pubmed-article:21040903pubmed:year2010lld:pubmed
pubmed-article:21040903pubmed:articleTitleFriedreich's ataxia induced pluripotent stem cells model intergenerational GAA?TTC triplet repeat instability.lld:pubmed
pubmed-article:21040903pubmed:affiliationDepartment of Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037, USA.lld:pubmed
pubmed-article:21040903pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:21040903pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
pubmed-article:21040903pubmed:publicationTypeResearch Support, N.I.H., Extramurallld:pubmed
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