Analysis of Pro12Ala PPAR gamma polymorphism and Helicobacter pylori infection in gastric adenocarcinoma and peptic ulcer disease.
BACKGROUND
Peroxisome proliferator-activated receptor gamma (PPARgamma) is a ligand-dependent transcription factor involved in various disease processes including inflammation and carcinogenesis. We investigated the association of Pro12Ala PPARgamma polymorphism and Helicobacter pylori infection with gastric cancer and peptic ulcer disease (PUD).


METHODS
In total, 348 adult patients [62 gastric adenocarcinoma, 45 PUD and 241 nonulcer dyspepsia (NUD)] who underwent an upper gastrointestinal endoscopy were enrolled. PPARgamma polymorphism was analyzed by PCR-based restriction fragment length polymorphism. H. pylori infection was diagnosed by rapid urease test, culture, histopathology and PCR.


RESULTS
PPARgamma G carrier had significant association with gastric adenocarcinoma [P = 0.023, odds ratio (OR) = 2.136, 95% CI = 1.112-4.104] and PUD (P = 0.028, OR = 2.165, 95% CI = 1.008-4.306) when compared with NUD. Combination of G carrier and H. pylori infection further increased the risk of gastric adenocarcinoma (OR = 3.054, 95% CI = 1.195-7.807) and PUD (OR = 11.161, 95% CI = 3.495-35.644). PPARgamma polymorphism did not increase the risk of gastric adenocarcinoma and PUD in H. pylori-negative subjects.


CONCLUSIONS
The study suggests that Pro12Ala PPARgamma polymorphism is associated with gastric adenocarcinoma and PUD, and is a potential marker for genetic susceptibility to these two diseases in the presence of H. pylori infection.
Prasad
K N
KN
Department of Microbiology. Electronic address: knprasad@sgpgi.ac.in.
Saxena
A
A
Department of Microbiology.
Ghoshal
U C
UC
Department of Gastroenterology.
Bhagat
M R
MR
Department of Gastroenterology, Central Command Hospital, Lucknow, India.
Krishnani
N
N
Department of Pathology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow.
D000230:Adenocarcinoma / Q000453:epidemiology / Q000235:genetics* / Q000382:microbiology; D000328:Adult; D004415:Dyspepsia / Q000453:epidemiology / Q000235:genetics / Q000382:microbiology; D005260:Female; D016481:Helicobacter Infections / Q000453:epidemiology / Q000235:genetics*; D006801:Humans; D007194:India / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D047495:PPAR gamma / Q000235:genetics*; D010437:Peptic Ulcer / Q000453:epidemiology / Q000235:genetics* / Q000382:microbiology; D011110:Polymorphism, Genetic; D015995:Prevalence; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000382:microbiology
D047495:PPAR gamma