Abstract:
:To investigate the effects of TNF-alpha -308, -238 promoter polymorphisms on TNF-alpha transcription in B27 positive Chinese patients with ankylosing spondylitis (AS). The possible relationship between polymorphisms, MHC antigens, and quantitative TNF-alpha mRNA expression were evaluated. Single nucleotide polymorphisms (SNPS) of TNF-alpha -308 and -238 were performed by PCR-amplification refractory mutation system method (PCR-ARMS) in sixty-seven B27-positive AS patients and 60 HLA-B27 positive healthy controls in Chinese. Quantitative measurement of TNF-alpha mRNA in peripheral blood mononuclear cells was performed with real time RT-PCR. The polymorphisms were correlated to quantitative TNF-alpha mRNA, and MHC antigens (determined by SSP method) in AS patients. The prevalence rate of both -308G/A and -238G/A TNF-alpha promoter polymorphisms in patients were not significantly different from those in normal subjects. However, a significant high LPS-stimulated TNF-alpha mRNA expression was found in peripheral blood mononuclear cells from patients with promoter -308G/A polymorphism (TNF2) as compared to those in -308G/G genotype (TNF1). Furthermore, -308G/A polymorphism in patients was found to be tightly associated with distinct haplotypes of A33/B58/Cw10 [12 out of 14 -308G/A patients (85.7%) versus none in 53 -308G/G patients], independent of B27 antigen. HLA-A33-B58-Cw10 haplotypes associated TNF-alpha promoter -308G/A polymorphism might play an important role in disease pathogenesis of AS in Chinese population, partially related to a driving force of a higher TNF-alpha production. It confirms once again the importance and complexity of MHC related molecules in disease pathogenesis of AS.
journal_name
Rheumatol Intjournal_title
Rheumatology internationalauthors
Lu MC,Yang KL,Tung CH,Huang KY,Yu HC,Liu SQ,Lai NSdoi
10.1007/s00296-008-0671-zsubject
Has Abstractpub_date
2008-12-01 00:00:00pages
189-95issue
2eissn
0172-8172issn
1437-160Xjournal_volume
29pub_type
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