title: HLA-DQB1 locus and gastric cancer in Helicobacter pylori infection.
abstract: OBJECTIVE
  It has been suggested that the incidence of digestive diseases associated with Helicobacter pylori is influenced by the strain diversity of H. pylori, factors involving the host or environment, and the duration of infection. The authors have previously reported that human leukocyte antigen (HLA)-DQB1*0401 plays an important role in the development of atrophic gastritis in H. pylori infected patients. The aim of the present study was to investigate the relationship between HLA-DQB1 genotype and cancer development.
  
  
  METHODS
  HLA-DQB1 genotyping was performed by the PCR-RFLP method on 122 H. pylori-infected non-ulcer dyspepsia (NUD) patients, 53 gastric cancer patients and 28 uninfected controls. To reliably estimate the grade of atrophic gastritis, histological evaluation was performed.
  
  
  RESULTS
  The allele frequency of DQB1*0401 was significantly higher in intestinal type cancer patients compared with age- and sex-matched H. pylori-infected NUD patients. There was no significant difference in the mean atrophic scores of the biopsy samples from the lesser curvature of the mid-corpus between these groups.
  
  
  CONCLUSIONS
  HLA-DQB1*0401 is a useful marker for determining susceptibility to intestinal type gastric cancer.
authors.affiliation: Division of Diabetes, Digestive and Kidney Diseases, Department of Clinical Molecular Medicine, Kobe University School of Medicine, Kobe, Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Nobuo
authors.initials: N
authors.lastname: Aoyama
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Sakai
authors.forename: Daisuke
authors.initials: D
authors.lastname: Shirasaka
authors.forename: Shuji
authors.initials: S
authors.lastname: Maekawa
authors.forename: Kohei
authors.initials: K
authors.lastname: Kuroda
authors.forename: Casmir
authors.initials: C
authors.lastname: Wambura
authors.forename: Takao
authors.initials: T
authors.lastname: Tamura
authors.forename: Yoshisuke
authors.initials: Y
authors.lastname: Nose
authors.forename: Masato
authors.initials: M
authors.lastname: Kasuga
mesh_terms: D000230:Adenocarcinoma / Q000150:complications / Q000235:genetics* / Q000473:pathology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D000907:Antibodies, Bacterial / Q000032:analysis; D001706:Biopsy; D004247:DNA / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006683:HLA-DQ Antigens / Q000235:genetics*; D059866:HLA-DQ beta-Chains; D016481:Helicobacter Infections / Q000235:genetics* / Q000382:microbiology / Q000473:pathology; D016480:Helicobacter pylori / Q000276:immunology / Q000302:isolation & purification*; D006801:Humans; D019901:Locus Control Region; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D013274:Stomach Neoplasms / Q000150:complications / Q000235:genetics* / Q000473:pathology
chemical_list: D000907:Antibodies, Bacterial; D005819:Genetic Markers; D006683:HLA-DQ Antigens; D059866:HLA-DQ beta-Chains; C069051:HLA-DQB1 antigen; D004247:DNA