title: [Association of the HLA-DQB*0501, allele of the major histocompatibility complex with gastric cancer in Mexico].
abstract: Etiology of gastric cancer is related to environmental and host factors, Helicobacter pylori infection is the main environmental factor, but it has been also proposed that some major histocomnpatibility complex genes are related to susceptibility and resistance to develop Helicobacter pylori associated gastric diseases. The aim of this study was to study distribution and frequency of some HLA -DQ genes, among Mexican patients harboring gastric diseases. We studied 20 subjects suffering from gastric cancer and 40 subjects harboring Helicobacter pylori-associated chronic gastritis. Diagnosis was confirmed by biopsy. HLA genotyping was performed by a polymerase chain reaction procedure. Ninety nine healthy individuals were also utilized for comparative purposes. Patients with gastric cancer displayed high frequency of HLA-DQA1*0601 (p = 0.003; OR = 20.9, 95% CI = 2.11-506.2) and HLA-DQB1*0501 alleles, the latter when compared to patients with chronic gastritis (p = 0.04; OR = 3.58, 95% CI = 1.05-12.5) and to healthy individuals (p = 0.002; OR = 4.5, 95% CI =1.59-12.7). According to our results, in addition to Helicobacter pylori infection, there are immunogeneic markers of the HLA-DQ region, which are determinant in confering susceptibility for gastric cancer.
authors.affiliation: Departamento de Patología, Instituto Nacional de Cancerología, Tlalpan México. rhgoepfert@yahoo.com.mx
authors.forename: Roberto
authors.initials: R
authors.lastname: Herrera-Goepfert
authors.forename: Joaquín
authors.initials: J
authors.lastname: Zúñiga
authors.forename: Angélica
authors.initials: A
authors.lastname: Hernández-Guerrero
authors.forename: Tatiana
authors.initials: T
authors.lastname: Rodríguez-Reyna
authors.forename: Norma
authors.initials: N
authors.lastname: Osnalla
authors.forename: Jorge
authors.initials: J
authors.lastname: Ruíz-Morales
authors.forename: Gilberto
authors.initials: G
authors.lastname: Vargas-Alarcón
authors.forename: Jesús K
authors.initials: JK
authors.lastname: Yamamoto-Furusho
authors.forename: Alejandro
authors.initials: A
authors.lastname: Mohar-Betancourt
authors.forename: Rogelio
authors.initials: R
authors.lastname: Hernández-Pando
authors.forename: Julio
authors.initials: J
authors.lastname: Granados
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005756:Gastritis / Q000382:microbiology; D006683:HLA-DQ Antigens / Q000235:genetics*; D016481:Helicobacter Infections / Q000453:epidemiology; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000382:microbiology
chemical_list: D006683:HLA-DQ Antigens