Document Detail

Sialosyl-Tn antigen is prevalent and precedes dysplasia in ulcerative colitis: a retrospective case-control study.
MedLine Citation:
PMID:  8608878     Owner:  NLM     Status:  MEDLINE    
BACKGROUND & AIMS: Expression of the carbohydrate-associated sialosyl-Tn (STn) antigen has been correlated with carcinogenesis in sporadic colon cancer. This retrospective study analyzed surveillance colonoscopy biopsy specimens to determine whether STn antigen could serve as a marker for neoplasia risk in patients with long-standing ulcerative colitis. METHODS: Eleven patients who developed dysplasia or cancer and who had undergone at least three surveillance colonoscopies were matched with 11 controls who had not developed neoplasia. Sections from 969 available surveillance biopsy specimens were stained immunohistochemically with monoclonal antibody TKH2 and were interpreted blindly. RESULTS: Compared with controls, patients expressed STn antigen more frequently in their biopsy specimens (44% patient biopsy specimens vs. 11% control biopsy specimens). Patients were also more likely to undergo colonoscopies with two or more colonic segments expressing STn antigen (73% vs. 22%), repeated STn antigen expression in two or more consecutive colonoscopies (91% vs. 27%), and STn antigen expression proximal to the hepatic flexure (64% vs. 0%). STn antigen appearance preceded the detection of neoplasia by 7 or fewer years, and its preferential expression in patients was not confounded by the degree of active inflammation. CONCLUSIONS: Repeated STn antigen expression in nondysplastic colonic mucosa may presage the development of neoplasia in long-standing ulcerative colitis and may be a useful adjunct to dysplasia during colonoscopic surveillance.
S H Itzkowitz; E Young; D Dubois; N Harpaz; C Bodian; A Chen; D B Sachar
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Gastroenterology     Volume:  110     ISSN:  0016-5085     ISO Abbreviation:  Gastroenterology     Publication Date:  1996 Mar 
Date Detail:
Created Date:  1996-05-30     Completed Date:  1996-05-30     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0374630     Medline TA:  Gastroenterology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  694-704     Citation Subset:  AIM; IM    
Gastrointestinal Research Laboratory, Department of Mecicine, Mount Sinai School of Medicine, City University of New York, USA.
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MeSH Terms
Antigens, Tumor-Associated, Carbohydrate / metabolism*
Case-Control Studies
Colitis, Ulcerative / immunology*,  pathology
Colon / immunology*,  pathology
Middle Aged
Precancerous Conditions / immunology*,  pathology
Retrospective Studies
Reg. No./Substance:
0/Antigens, Tumor-Associated, Carbohydrate; 0/sialosyl-Tn antigen

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