Abstract:
AIMS:Intestinal metaplasia is considered to be a precursor lesion in both Barrett's and intestinal-type gastric cancer. The aim was to clarify the differences in molecular pathology between specialized intestinal metaplasia (SIM) in Barrett's oesophagus (BO), cardiac (CIM) and gastric intestinal metaplasia (GIM). METHODS AND RESULTS:Eighty-eight SIM cases with BO, 30 CIM cases and 52 GIM cases in patients with or without Helicobacter pylori infectionwere analysed for genetic instability and Das-1. Microsatellite instability and a loss of heterozygosity were evaluated at five microsatellite loci. The incidence of genetic instability was 55.7% in SIM, 40.0% in CIM and 23.1% in GIM, revealing a significant difference between SIM and GIM (P < 0.0005). For each microsatellite marker analysed, there were obvious differences in frequency among the three conditions. Das-1 reactivity was significantly higher in SIM than in CIM or GIM (P < 0.0001, both). Interestingly, both genetic instability and Das-1 reactivity in SIM showed a significantly higher incidence in patients with H. pylori infection than in those without (P < 0.005 and P < 0.01, respectively). CONCLUSIONS:SIM is distinct from CIM and GIM, and the pathogenesis of SIM, like that of GIM, is associated to some degree with H. pylori infection in a Japanese population.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Watari J,Moriichi K,Tanabe H,Sato R,Fujiya M,Miwa H,Das KM,Kohgo Ydoi
10.1111/j.1365-2559.2009.03370.xsubject
Has Abstractpub_date
2009-09-01 00:00:00pages
261-9issue
3eissn
0309-0167issn
1365-2559pii
HIS3370journal_volume
55pub_type
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