ISSN:
1573-2568
Keywords:
APOPTOSIS
;
PROLIFERATION
;
HELICOBACTER PYLORI
;
NONSTEROIDAL ANTIINFLAMMATORY DRUGS
;
STOMACH
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract It remains controversial whether the harmfuleffects of Helicobacter pylori (Hp) and nonsteroidalantiinflammatory drugs (NSAIDs) are additive. We studiedthe effects of Hp (virulent and nonvirulent strains) and NSAIDs, alone or in combination, onapoptosis and proliferation of gastric epithelial cellsin nonulcer dyspepsia (NUD) patients. Forty-four (25Hppositive and 19 Hp-negative) consecutive Chinese NUD patients with rheumatoid arthritis who hadtaken continuously NSAIDs for more than three monthswere recruited for this study. Another 41 (20Hp-positive and 21 Hp-negative) NUD patients not on anyNSAIDs were included as controls. All patientsunderwent a gastroscopy examination and gastricbiopsies. Hp infection was confirmed by CLOtest, anti-HpELISA, and [13C]urea breath test. The CagAstatus was determined by the anti-CagA antibody assay. The degree ofgastritis, apoptosis, and proliferation indices weredetermined with H&E staining, terminal uridinedeoxynucleotidyl nick end-labeling (TUNEL), andproliferating cell nuclear antigen (PCNA) immunostainingmethods, respectively. A significantly higher apoptosiswas observed in subjects who had Hp infection or hadbeen consuming NSAIDs when compared with the controls. Unlike NSAID-treated subjects, patients with Hpinfection were shown to have significantly enhanced cellproliferation. However, the increased apoptosis andproliferation in Hp-positive subjects were reversed by also taking NSAIDs. No correlation was foundbetween apoptosis and proliferation in all the studygroups. There was no association found between CagAexpression or degree of gastritis with cellproliferation or apoptosis. It was demonstrated at thecellular level that NSAIDs could abrogate apoptosis orproliferation effects induced by Hp. Furthermore, thelatter effects appeared not to be influenced by the virulent nature of the Hp strains.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018830408397
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