Effects of the Helicobacter pylori Virulence Factor CagA and Ammonium Ion on Mucins in AGS Cells
Yonsei Medical Journal
;
: 633-642, 2018.
Article
in English
| WPRIM
| ID: wpr-715899
ABSTRACT
PURPOSE:
To investigate the effects of Helicobacter pylori (H. pylori)-CagA and the urease metabolite NH₄⁺ on mucin expression in AGS cells. MATERIALS ANDMETHODS:
AGS cells were transfected with CagA and/or treated with different concentrations of NH₄⁺CL. Mucin gene and protein expression was assessed by qPCR and immunofluorescence assays, respectively.RESULTS:
CagA significantly upregulated MUC5AC, MUC2, and MUC5B expression in AGS cells, but did not affect E-cadherin and MUC6 expression. MUC5AC, MUC6, and MUC2 expression in AGS cells increased with increasing NH₄⁺ concentrations until reaching a peak level at 15 mM. MUC5B mRNA expression in AGS cells (NH₄⁺ concentration of 15 mM) was significantly higher than that at 0, 5, and 10 mM NH₄⁺. No changes in E-cadherin expression in AGS cells treated with NH₄⁺ were noted, except at 20 mM. The expression of MUC5AC, MUC2, and MUC6 mRNA in CagA-transfected AGS cells at an NH₄⁺ concentration of 15 mM was significantly NH₄⁺ concentration, and was significantly higher compared to that in untreated cells. No significant change in the expression of E-cadherin mRNA in CagA-transfected AGS cells was observed. Immunofluorescence assays confirmed the observed changes.CONCLUSION:
H. pylori may affect the expression of MUC5AC, MUC2, MUC5B, and MUC6 in AGS cells via CagA and/or NH₄⁺, but not E-cadherin.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Stomach
/
Urease
/
Virulence
/
RNA, Messenger
/
Cadherins
/
Helicobacter pylori
/
Fluorescent Antibody Technique
/
Helicobacter
/
Ammonium Compounds
/
Ammonium Chloride
Language:
English
Journal:
Yonsei Medical Journal
Year:
2018
Type:
Article
Similar
MEDLINE
...
LILACS
LIS