Abstract:
BACKGROUND AND AIM:To clarify the roles of Helicobacter pylori cytotoxin in gastric atrophy, the cytotoxin positive rate and cytotoxin activity in Fukui and Okinawa, where the prevalence of atrophic gastritis and gastric cancer risk are quite different, were studied. MATERIALS:Seventy three strains from Fukui and 51 from Okinawa were examined. METHODS:The validation of atrophy was done by endoscopy, being confirmed with histology. The supernatant of liquid H pylori culture media was concentrated 20-fold, serially diluted, using doubling dilutions, and scored from 1 to 8. The semi-quantitated cytotoxin activity was expressed as the maximum dilution score yielding > 50% A431 cell vacuolation, being standardised with bacterial density. RESULTS:The cytotoxin activity of the strains from Fukui was highly diverse compared with that from Okinawa, although the cytotoxin positive rate was not different. In Fukui strains, the grade of atrophy and the cytotoxin activity were correlated (p < 0.05). In addition, the cytotoxin activity of the strains from all patients in Okinawa, most of whom showed closed-type/mild atrophy, was significantly lower than that of the strains from the patients with open-type/severe atrophy in Fukui (6.46 (5.53) v 9.76 (8.80), p < 0.05), (mean (SEM)). CONCLUSION:The difference in profile of the cytotoxin activity in the two areas was related to the difference in the prevalence of atrophic gastritis.
journal_name
Gutjournal_title
Gutauthors
Ito S,Azuma T,Murakita H,Hirai M,Miyaji H,Ito Y,Ohtaki Y,Yamazaki Y,Kuriyama M,Keida Y,Kohli Ydoi
10.1136/gut.39.6.800subject
Has Abstractpub_date
1996-12-01 00:00:00pages
800-6issue
6eissn
0017-5749issn
1468-3288journal_volume
39pub_type
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