[Linkage disequilibrium analysis of -31, -511, -1470 single nucleotide polymorphisms in the promoter of IL-1 beta in Chongqing population].
OBJECTIVE
To investigate the frequencies of -31, -511 and -1470 single nucleotide polymorphisms (SNPs) in the promoter of IL-1 beta in Chongqing population and address the question whether they are in linkage disequilibrium (LD).


METHODS
One hundred and twelve healthy Chongqing people were enrolled in this study. Polymorphisms at -31 (C>T), -511 (T>C) and -1470 (G>C) of IL-1 beta were genotyped with the method of restriction fragment length polymorphism (RFLP). Haplotype frequencies were evaluated with Arlequine software. Two-point LD analyses were done with the software TransposerV1-0. The P values were determined by Pearson chi square test analysis.


RESULTS
Allelic frequencies of IL-1 beta -31, -511 and -1470 were 45.33%, 50.00% and 41.67%, respectively. The dominant haplotypes comprising the three loci were T-C-G (44.1%), C-T-C(40.3%) and C-T-G(8.8%), LD analyses revealed that none of the LD parameters(delta value) was 0. Meanwhile, chi square test showed P<0.005.


CONCLUSIONS
-31, -511 and -1470 loci in the promoter region of IL-1 beta are in strong linkage disequilibrium. And this study provides a basis for searching disease-related IL-1 beta haplotye.
Wen
Ai-qing
AQ
Research Institute of Surgery, Daping Hospital, The Third Military Medical University, Chongqing, 400042 PR China.
Jiang
Jian-xin
JX
Zhu
Pei-fang
PF
Feng
Kai
K
D000328:Adult; D002681:China; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D053583:Interleukin-1beta / Q000235:genetics*; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic / Q000235:genetics*
D053583:Interleukin-1beta