Gastrokine 1 Expression in the Human Gastric Mucosa Is Closely Associated with the Degree of Gastritis and DNA Methylation
Journal of Gastric Cancer
; : 232-241, 2013.
Article
in En
| WPRIM
| ID: wpr-196045
Responsible library:
WPRO
ABSTRACT
PURPOSE:
Gastrokine 1 plays an important role in gastric mucosal defense. Additionally, the Gastrokine 1-miR-185-DNMT1 axis has been shown to suppress gastric carcinogenesis through regulation of epigenetic alteration. Here, we investigated the effects of Gastrokine 1 on DNA methylation and gastritis. MATERIALS ANDMETHODS:
Expression of Gastrokine 1, DNMT1, EZH2, and c-Myc proteins, and the presence of Helicobacter pylori CagA protein were determined in 55 non-neoplastic gastric mucosal tissue samples by western blot analysis. The CpG island methylation phenotype was also examined using six markers (p16, hMLH1, CDH1, MINT1, MINT2 and MINT31) by methylation-specific polymerase chain reaction. Histological gastritis was assessed according to the updated Sydney classification system.RESULTS:
Reduced Gastrokine 1 expression was found in 20 of the 55 (36.4%) gastric mucosal tissue samples and was closely associated with miR-185 expression. The Gastrokine 1 expression level was inversely correlated with that of DNMT1, EZH2, and c-Myc, and closely associated with the degree of gastritis. The H. pylori CagA protein was detected in 26 of the 55 (47.3%) gastric mucosal tissues and was positively associated with the expression of DNMT1, EZH2, and c-Myc. In addition, 30 (54.5%) and 23 (41.9%) of the gastric mucosal tissues could be classified as CpG island methylation phenotype-low and CpG island methylation phenotype-high, respectively. Reduced expression of Gastrokine 1 and miR-185, and increased expression of DNMT1, EZH2, and c-Myc were detected in the CpG island methylation phenotype-high gastric mucosa.CONCLUSIONS:
Gastrokine 1 has a crucial role in gastric inflammation and DNA methylation in gastric mucosa.Key words
Full text:
1
Index:
WPRIM
Main subject:
Phenotype
/
Axis, Cervical Vertebra
/
DNA
/
Blotting, Western
/
Polymerase Chain Reaction
/
Proto-Oncogene Proteins c-myc
/
Helicobacter pylori
/
Classification
/
CpG Islands
/
DNA Methylation
Limits:
Humans
Language:
En
Journal:
Journal of Gastric Cancer
Year:
2013
Type:
Article