title: Correlation between Patterns of Mdm2 SNIP 309 and Histopathological Severity of Helicobacter pylori Associated Gastritis in Thailand.
abstract: BACKGROUND
  The commonly held view of the tumor suppressor p53 is as a regulator of cell proliferation, apoptosis and many other biological processes as well as external and internal stress responses. Mdm2 SNIP309 is a negative regulator of p 53. Therefore, this study aimed to determine the correlation between the patterns of Mdm2 SNIP 309 and the inflammation grading of Helicobacter pylori associated gastritis in a Thai population.
  
  
  METHODS
  A cross-sectional study was carried out from November 2014 through June 2015. Biopsy specimens were obtained from infected patients and infection was proved by positive histology. The gastric mucosa specimens were sent to the Molecular Genetic Unit, Institute of Medicine, Suranaree University of Technology where they were tested by molecular methods to detect the patterns of Mdm2 SNIP 309 using the real-time PCR hybridization probe method. The results were analyzed and compared with the Updated Sydney classification.
  
  
  RESULTS
  A total of 100 infected patients were interviewed and gastric mucosa specimens were collected. In this study the percentage of Mdm2 SNIP 309 T/T homozygous and Mdm2 SNIP309 G/T heterozygous was 78% and 19 % respectively whereas Mdm2 SNIP309 G/G homozygous was 3%. Mdm2 SNIP 309 T/T homozygous and Mdm2 SNIP309 G/T heterozygous correlated with mild to moderate inflammation (P<0.01) whereas Mdm2 SNIP309 G/G homozygous correlated with severe inflammation (P<0.01).
  
  
  CONCLUSIONS
  Our study found the frequency of Mdm2 SNP309 G/G in our Thai population to be very low, and suggests that this can explain to some extent the low incidence of severe inflammation and gastric cancer changes in the Thai population. Mild to moderate inflammation are the most common pathologic gradings due to the unique genetic polymorphism of Mdm2 SNIP 309 in the Thai population.
authors.affiliation: Department of Surgery, Institute of Medicine, Suranaree University of Technology, Nakhonrachasima, Thailand E-mail : taweesak.t@sut.ac.th.
authors.forename: Taweesak
authors.initials: T
authors.lastname: Tongtawee
authors.forename: Chavaboon
authors.initials: C
authors.lastname: Dechsukhum
authors.forename: Krajang
authors.initials: K
authors.lastname: Talabnin
authors.forename: Wilairat
authors.initials: W
authors.lastname: Leeanansaksiri
authors.forename: Soraya
authors.initials: S
authors.lastname: Kaewpitoon
authors.forename: Natthawut
authors.initials: N
authors.lastname: Kaewpitoon
authors.forename: Ryan A
authors.initials: RA
authors.lastname: Loyd
authors.forename: Likit
authors.initials: L
authors.lastname: Matrakool
authors.forename: Sukij
authors.initials: S
authors.lastname: Panpimanmas
mesh_terms: D017209:Apoptosis / Q000235:genetics; D049109:Cell Proliferation / Q000235:genetics; D003430:Cross-Sectional Studies; D018450:Disease Progression; D005260:Female; D005753:Gastric Mucosa / Q000382:microbiology / Q000473:pathology; D005756:Gastritis / Q000453:epidemiology* / Q000382:microbiology; D005786:Gene Expression Regulation / Q000235:genetics*; D005787:Gene Frequency / Q000235:genetics*; D016481:Helicobacter Infections / Q000382:microbiology / Q000473:pathology*; D016480:Helicobacter pylori; D006801:Humans; D007249:Inflammation / Q000382:microbiology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D051736:Proto-Oncogene Proteins c-mdm2 / Q000235:genetics*; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000473:pathology; D013785:Thailand / Q000453:epidemiology; D016159:Tumor Suppressor Protein p53 / Q000235:genetics
chemical_list: C495901:TP53 protein, human; D016159:Tumor Suppressor Protein p53; C497206:MDM2 protein, human; D051736:Proto-Oncogene Proteins c-mdm2