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Evidence of cis-acting regulatory variation in PTPN22 in patients with rheumatoid arthritis.
MedLine Citation:
PMID:  22632125     Owner:  NLM     Status:  Publisher    
Objectives: To assess whether there are cis-regulatory polymorphisms that regulate protein tyrosine phosphatase, non-receptor type 22 (PTPN22) expression in rheumatoid arthritis (RA). Methods: RNA was extracted from positively selected CD56+, CD8+, and CD4+ mononuclear cells and the 'residual' cells from 12 RA patients heterozygous for the PTPN22 C1858T single nucleotide polymorphism (SNP) (rs2476601). Relative allelic expression was measured by single base extension (SBE) assay. Results: There was relative differential allelic expression (DAE ≥ 20%) in eight patients (p < 10(-5)); seven patients demonstrated DAE in more than one cell type; four patients had statistically significant differences between these cell populations (p(corrected) < 0.05). Conclusions: We have demonstrated significant differences in expression of PTPN22 alleles in RA patients, indicating the probable existence of cis-acting regulatory elements.
P Harrison; L Southam; K Chapman; R Locklin; A Sabokbar; Bp Wordsworth; Jj Pointon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-28
Journal Detail:
Title:  Scandinavian journal of rheumatology     Volume:  -     ISSN:  1502-7732     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0321213     Medline TA:  Scand J Rheumatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Oxford University Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre , Oxford , UK.
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