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  • Title: Correlation between some Th1 and Th2 cytokine receptor gene polymorphisms and systemic lupus erythematosus in Chinese patients.
    Author: Xu Y, Chen ZQ, Li YM, Gong JQ, Li AS, Chen M, Liu J.
    Journal: Int J Dermatol; 2007 Nov; 46(11):1129-35. PubMed ID: 17988330.
    Abstract:
    BACKGROUND: Genetic factors seem to play a significant role in the susceptibility to systemic lupus erythematosus (SLE). Some researchers have described amino acid polymorphisms within the interleukin-4 receptor (IL-4R) [isoleucine50valine (Ile50Val), arginine576glutamine (Arg576Gln), etc.], the IL-10R (G241A and G520A), and the interferon-gamma receptor (IFN-gammaR) [valine14methionine (Val14Met) and glutamine64arginine (Gln64Arg)]. METHODS: The Ile50Val genotypes were examined by the reverse transcription-polymerase chain reaction-single-strand conformation polymorphism (RT-PCR-SSCP) method and DNA sequencing. The RT-PCR-restriction fragment length polymorphism (RT-PCR-RFLP) method was used to detect the Arg576Gln, G241A, G520A, Val14Met, and Gln64Arg genotypes. RESULTS: There were significant differences in the genotype frequencies of Ile50/Ile50, G520/G520, and G520/A520 between the SLE group and healthy control group. There was a positive correlation between the IL-4R Ile50/Ile50 genotype and the susceptibility to SLE (P = 0.022). This was also found for the IL-10R G520/G520 (P = 0.004) and G520/A520 (P = 0.055) genotypes. The risk of SLE susceptibility was increased in individuals with the genotype combinations Ile50/Ile50 and Gln576/Arg576 (P = 0.056) and G241/G241 and G520/G520 (P = 0.004). The IFN-gammaR2 Arg64/Arg64 genotype decreased the risk of SLE (P = 0.047). A decreased risk of development of SLE was detected in individuals with the genotype combination IFN-gammaR2 Arg64/Arg64 and IFN-gammaR1 Val14/Val14 (P = 0.004). CONCLUSIONS: The IL-4R Ile50/Ile50 and IL-10R2 G520/G520 and G520/A520 genotypes were shown to determine the susceptibility to SLE in a Chinese population, as were the combinations Ile50/Ile50 and Gln576/Arg576, and G241/G241 and G520/G520.
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