Associations of FUT2 and FUT3 gene polymorphisms with Crohn's disease in Chinese patients.
OBJECTIVE
FUT2 and FUT3 genes are responsible for the formation of histo-blood group antigens, which act as binding sites for some intestinal microbes. Several studies suggested that FUT2 gene might affect the intestinal microbiota composition and modulate innate immune responses. However, the effect of FUT2 polymorphisms on Crohn's disease (CD) is uncertain. Our study aimed to analyze associations of CD with FUT2 and FUT3 polymorphisms in Chinese population.


METHODS
A total of 273 CD patients and 479 controls were recruited. The genotypes of FUT2 (rs281377, rs1047781, and rs601338) and FUT3 (rs28362459, rs3745635, and rs3894326) were detected by SNaPshot analysis.


RESULTS
Compared with controls, homozygote TT of FUT2 (rs1047781) was significantly increased in CD patients (TT vs others; P = 0.002, odds ratio [OR] = 1.767, 95% confidence interval [CI] = 1.235-2.528). The haplotype TT formed with FUT2 (rs281377) and (rs1047781) was more prevalent in CD patients than in controls (48.9% vs 43.5%, P = 0.046). Mutant T allele and homozygote TT of FUT2 (rs1047781) were increased in colonic CD patients compared with controls (P < 0.001, OR = 1.843, 95% CI = 1.353-2.512; P < 0.001, OR = 2.607, 95% CI = 1.622-4.191, respectively). Although allele and genotypic distributions of FUT3 were not statistically different between CD patients and controls, mutant allele and genotype of FUT3 (rs28362459) and (rs3745635) were significantly discrepant in three subgroups of CD patients according to lesion locations (all P < 0.05).


CONCLUSIONS
Our study strongly implicates the polymorphic locus of FUT2 (rs1047781) in CD susceptibility in Chinese population. Mutations of FUT3 (rs28362459) and (rs3745635) might influence the lesion locations in CD patients.
Department of Gastroenterology, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.
Ding-yuan
DY
Hu
Xiao-xiao
XX
Shao
Chang-long
CL
Xu
Sheng-long
SL
Xia
Li-qin
LQ
Yu
Li-jia
LJ
Jiang
Jie
J
Jin
Xiu-qing
XQ
Lin
Yi
Y
Jiang
D000328:Adult; D044466:Asian People; D003424:Crohn Disease / Q000235:genetics*; D005260:Female; D005647:Fucosyltransferases / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D055815:Young Adult; D000097631:Galactoside 2-alpha-L-fucosyltransferase
D005647:Fucosyltransferases; D000097631:Galactoside 2-alpha-L-fucosyltransferase; C019818:3-galactosyl-N-acetylglucosaminide 4-alpha-L-fucosyltransferase
Crohn's disease; fucosyltransferase; gene; polymorphism