TGFB1 gene polymorphisms: their relevance in the susceptibility to Helicobacter pylori-related diseases.
Recent studies have revealed elevated expression of transforming growth factor beta1 (TGF-beta1) in gastric mucosa of patients with gastric cancer (GC) and those undergoing ulcer repair. As production of TGF-beta1 is genetically regulated, we aimed to assess whether functional polymorphisms of the TGFB1 gene are involved in susceptibility to and clinical characteristics of Helicobacter pylori-related diseases. DNA from 142 unrelated Spanish patients with GC, 200 with peptic ulcer and 342 healthy controls was typed for the MspA1I T+869C, and the Sau96I G+915C polymorphisms of the TGFB1 gene using polymerase chain reaction and RFLP analysis. H. pylori infection and CagA/VacA antibody status were determined by Western blot in patients and controls. H. pylori infection (odds ratio (OR): 11.44; 95% confidence interval (CI): 4.45-29.42; P<0.001) and non-steroidal anti-inflammatory drugs (OR: 5.07; 95% CI: 2.53-10.16; P<0.001) were identified as independent risks factors for duodenal ulcer (DU), whereas the TGFB1+869(*)C/C genotype was associated with reduced risk of developing the disease (OR: 0.32; 95% CI=0.15-0.68; P=0.003). Our results show that the TGFB1 T+869C gene polymorphism is involved in the susceptibility to DU and provide further evidence that host genetic factors play a key role in the pathogenesis of H. pylori-related diseases.
Garcia-Gonzalez
M A
MA
Unidad Mixta de Investigación, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain. asgarcia@unizar.es
Strunk
M
M
Piazuelo
E
E
Benito
R
R
Santolaria
S
S
Jiménez
P
P
Sopeña
F
F
Pascual
C
C
Simón
M A
MA
Sainz
R
R
Lanas
A
A
D000368:Aged; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects; D015153:Blotting, Western; D020022:Genetic Predisposition to Disease; D016481:Helicobacter Infections / Q000235:genetics*; D016480:Helicobacter pylori; D006801:Humans; D008875:Middle Aged; D010437:Peptic Ulcer / Q000139:chemically induced / Q000235:genetics* / Q000382:microbiology; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D012307:Risk Factors; D013030:Spain; D013274:Stomach Neoplasms / Q000235:genetics*; D053773:Transforming Growth Factor beta1 / Q000235:genetics*
D000894:Anti-Inflammatory Agents, Non-Steroidal; C508960:TGFB1 protein, human; D053773:Transforming Growth Factor beta1