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- W1893013317 abstract "TCRzeta (CD247) functions as an amplification module in the TCR signaling cascade and is essential for assembly and surface expression of the TCR/CD3 complex. The TCRzeta-chain is down-regulated in many chronic infectious and inflammatory diseases, including systemic lupus erythematosus (SLE). It is unclear whether reduced TCRzeta expression is a cause or a consequence of chronic inflammatory responses. We have addressed this question by adopting a combined genetic and functional approach. We analyzed TCRzeta protein expression using a FACS-based expression index and documented considerable, but longitudinally stable, variation in TCRzeta expression in healthy individuals. The variation in TCRzeta expression was associated with polymorphisms in the CD3Z 3'-untranslated region (UTR) in SLE patients and healthy controls. Detailed mapping of the 3'-UTR revealed that the minor alleles of two single nucleotide polymorphisms (SNPs) in strong disequilibrium (rs1052230 and rs1052231) were the causal variants associated with low TCRzeta expression (p=0.015). Using allelic imbalance analysis, the minor alleles of these 3'-UTR SNPs were associated with one-third of the level of mRNA compared with the major allele. A family-based association analysis showed that the haplotype carrying the low-expression variants predisposes to SLE (p=0.033). This suggests that a genetically determined reduction in TCRzeta expression has functional consequences manifested by systemic autoimmunity." @default.
- W1893013317 created "2016-06-24" @default.
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- W1893013317 date "2008-01-15" @default.
- W1893013317 modified "2023-10-11" @default.
- W1893013317 title "Polymorphisms in the <i>CD3Z</i> Gene Influence TCRζ Expression in Systemic Lupus Erythematosus Patients and Healthy Controls" @default.
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- W1893013317 doi "https://doi.org/10.4049/jimmunol.180.2.1060" @default.
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