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  • Title: CIITA rs4774 and rs6498122 polymorphisms are associated with oral lichen planus in Chinese people: a case-control study.
    Author: Wu D, Wang L, Sun M, Wang G, Fu S, Dong G, Wu Y.
    Journal: Eur J Oral Sci; 2013 Apr; 121(2):69-75. PubMed ID: 23489895.
    Abstract:
    Oral lichen planus (OLP) is a common autoimmune inflammatory disorder that is difficult to cure, and its pathogenesis is still largely unknown. The major histocompatibility complex (MHC) class II transactivator (CIITA) gene has been reported to be an important candidate in some classical autoimmune diseases, and certain single nucleotide polymorphisms (SNPs) in CIITA have been confirmed to be associated with susceptibility to some autoimmune diseases. We conducted this research to investigate the existence of any correlation between OLP and SNPs in CIITA. A case-control study was performed to genotype 15 SNPs in the CIITA gene from 42 patients with OLP and from 86 controls; this was carried out by the PCR and then by a locus-specific single-base extension reaction. Allele detection was performed using matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry. The SNP rs4774 variant in exon 11 (+1614G/C, Gly500Ala) of CIITA is significantly associated with OLP in healthy persons, both in genotype frequency and in allele frequency. Another intronic SNP, rs6498122, showed significant differences only in allele frequency. In conclusion, our data show that the two SNPs rs4774 and rs6498122 are associated with OLP and could also indicate the autoimmune characteristics of OLP.
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