Genetic polymorphism of cytokine genes in Han children in Beijing area / 中华实用儿科临床杂志

ABSTRACT

Objective To investigate the genetic polymorphism of 13 cytokines genes in Han individual children from Beijing area.Methods The polymerase chain reaction-sequence specific primers (PCR-SSP) method was used to determine cytokine gene polymorphism including interleukin (IL)-1α (-889C/T),IL-1β (-511C/T,+3942T/C),IL-1 R(pst1 1970C/T),IL-1RA(mspa1 11100T/C),IL-4Ra(+ 1902G/A),IL-12 (-1188C/A),interferon (IFN)-γ(+ 874A/T),transforming growth factor (TGF)-β1 (codon10C/T,codon25 G/C),tumor necrosis factor)(TNF)-α (-308G/A,-238G/A),IL-2 (-330T/G,+ 166G/T),IL-4 (-1098 T/G,-590 T/C,-33 T/C),IL-6(-174G/C,nt565G/A),IL-10 (-1082G/A,-819C/T,-592A/C) 13 cytokines genes in 210 unrelated healthy Han individuals from Beijing area.Results (1) Cytokine genes with frequencies more than or equal to 95 percent included IL-1β +3962 C,TGF-β Codon 25 G,IL-6-174 G,IL-6 nt565 G,TNF-α-308 G and TNF-α-238 G alleles;while cytokine genes with frequencies less than or equal to 5 persent included IL-1β + 3962 T,TGF-β Codon 25 C,IL-6-174C,IL-6 nt 565 A,TNF-α-308 A and TNF-α-238 A alleles.(2) The frequency of the high-producer-type GCC haplotype in IL-10 gene was 8.27％,while the low-producer-type ATA was 59.11％.The frequency of the highproducer-type TG haplotype in the TGF-β gene was 49.77％,while the low-producer-type CC was 0.The frequencies of the high-producer-types AG and AA haplotypes in the TNF-α gene were 3.34％,while those of the low-producer-types GG and GA were 96.67％.The frequency of the high-producer-types T/G genotype in the IL-2-330 gene was 11.90％,while those of the low-producer-types T/T and T/G were 88.10％.The frequencies of the high-producer-types G/G and G/C genotypes in the IL-6-174 gene were 99.52％,while that of the low-producer-types C/C was 0.48％.The frequency of the high-producer-types T/T genotype in the INF-γ+ 874 gene was 1.90％,and the frequency of the medium-producer-types T/A in the INF-γ+ 874 gene was 22.86％,while of the low-producer-types A/A was 75.24％.(3) New genotypes were foundthe frequency of IL-2(-330,+ 166) GG/GT/TT genotype was 1.90％,and the frequency of IL-2(-330,+ 166) TG/GG/GT/TT genotype was 0.48％,The frequency of IL-6(-174,nt565) CG/CG genotype was 0.48％,the frequency of IL-6 (-174,nt565) GA/GG genotype was 1.90％,The frequency of IL-6 (-174,nt565) GG/GA/CA genotype was 0.48％,The frequency of IL-10(-1082,-819,-592) GCC/ATC/ATA genotype was 0.95％,The frequency of IL-10(-1082,-819,-592) ACC/ACA/ATC/ATA genotype was 35.71％,The frequency of IL-10 (-1082,-819,-592) GCC/ACC/ACA/ATC/ATA genotype was 0.48％.Conclusion The genetic polymorphism of cytokine genes in Han individuals from Beijing area is different from other areas of China with higher frequencies of IL-10 (-1082,-819,-592) ACC/ACA/ATC/ATA genotype.