Document Detail

Functional dyspepsia is associated with cagA-positive Helicobacter pylori strains.
MedLine Citation:
PMID:  11336157     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The antigen CagA can be used as a marker for virulence of Helicobacter pylori. It is tempting to assume that H. pylori strains positive for cytotoxin-associated gene A (cagA) could be responsible for functional dyspepsia. A cross-sectional study was performed in patients presenting with functional dyspepsia to correlate the clinical presentation with the presence of cagA-positive and -negative H. pylori strains. METHODS: Consecutive patients referred for endoscopy were studied. An inclusion criterion was the absence of any endoscopic abnormality. Biopsy specimens were obtained from the gastric antrum for HE and immunoperoxidase stain, rapid urease test, and culture. A serum sample was taken for detection of IgG antibodies against H. pylori as well as CagA. A validated questionnaire of 14 questions regarding the upper gastrointestinal tract was used for assessment of the clinical presentation. Nine questions were scored on a 5-point Likert scale. RESULTS: 422 patients were included, 222 were H. pylori-positive, the remaining 200 were H. pylori-negative. Mean symptom score in patients with cagA-positive strains was significantly higher than in patients with cagA-negative strains. No difference was present if cagA-negative patients were compared with H. pylori-negative dyspeptics. Four different complaints were more prevalent in the cagA-positive patients compared with cagA-negatives. When cagA-positive patients were compared with H. pylori-negative dyspeptics, seven complaints were significantly more prevalent in cagA-positives; when cagA-negatives were compared this number was only two. CONCLUSIONS: Functional dyspeptics with cagA-positive H. pylori strains have more dyspeptic symptoms and higher symptom scores than patients with cagA-negative H. pylori strains as well as H. pylori-negative functional dyspeptics.
R J Loffeld; B F Werdmuller; J G Kusters; E J Kuipers
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Scandinavian journal of gastroenterology     Volume:  36     ISSN:  0036-5521     ISO Abbreviation:  Scand. J. Gastroenterol.     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2001-05-04     Completed Date:  2001-09-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0060105     Medline TA:  Scand J Gastroenterol     Country:  Norway    
Other Details:
Languages:  eng     Pagination:  351-5     Citation Subset:  IM    
Dept. of Internal Medicine, Ziekenhuis De Heel, Zaandam, The Netherlands.
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MeSH Terms
Aged, 80 and over
Antibodies, Bacterial / analysis
Antigens, Bacterial*
Bacterial Proteins / analysis*
Biological Markers / analysis
Cross-Sectional Studies
Dyspepsia / diagnosis,  microbiology*
Enzyme-Linked Immunosorbent Assay
Helicobacter Infections / microbiology*
Helicobacter pylori / classification,  genetics*,  pathogenicity*
Middle Aged
Reference Values
Retrospective Studies
Severity of Illness Index
Species Specificity
Reg. No./Substance:
0/Antibodies, Bacterial; 0/Antigens, Bacterial; 0/Bacterial Proteins; 0/Biological Markers; 0/cagA protein, Helicobacter pylori

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