The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Increased presence of cells containing transforming growth factor alpha (TGF-alpha) in ulcerative colitis, both during active inflammation and in remission

På svenska

Author

Summary, in English

OBJECTIVE: Patients with extensive and long-standing ulcerative colitis have an increased risk of developing colorectal cancer and sub-epithelial fibrosis. The polypeptide transforming growth factor alpha (TGF-alpha) has mitogenic effects and it is believed that local overproduction may result in tumour formation and fibrosis. DESIGN: In the present study, we correlated the presence of TGF-alpha in ulcerative colitis with the degree of inflammation and with dysplasia. METHODS: Sixty two patients were investigated, 46 with ulcerative colitis (16 with active inflammation and 20 in remission, 10 with dysplasia of the colon), and 16 controls with normal colonoscopy and without a history of colitis. There were no overlaps between the subgroups. Tissue sections from colonic biopsies were examined and TGF-alpha was detected by immunohistochemistry. TGF-alpha-containing cells were characterized by double-staining with antibodies to eosinophil cationic protein (ECP). An antibody (EG2) recognizing eosinophils with an activated phenotype was also used. RESULTS: The median number of TGF-alpha-containing cells in the mucosa was 24 per mm2 (inter-quartile range 10-51) in controls, 186 per mm2 (73-245) in ulcerative colitis with active inflammation, 76 per mm2 (52-198) in remission, and 130 per mm2 (66-203) in areas of dysplasia. Double-staining for TGF-alpha and ECP revealed that most of the TGF-alpha-containing cells were eosinophils, and most had an activated phenotype as judged by staining with EG2. CONCLUSIONS: The presence of TGF-alpha-containing cells in colonic mucosa is increased both in active inflammation and during remission in ulcerative colitis. Dysplasia is not associated with any significant increase in TGF-alpha-containing cells. The majority of TGF-alpha-containing cells are eosinophils with an activated phenotype. TGF-alpha released from these cells could be important for the development of complications seen in ulcerative colitis, such as cancer and fibrosis.

Publishing year

2000

Language

English

Pages

761-766

Publication/Series

European Journal of Gastroenterology and Hepathology

Volume

12

Issue

7

Document type

Journal article

Publisher

Lippincott Williams & Wilkins

Topic

  • Gastroenterology and Hepatology

Status

Published

Research group

  • Chronic Inflammatory and Degenerative Diseases Research Unit
  • Clinical Chemistry, Malmö
  • Pathology, Malmö
  • Urological cancer, Malmö

ISBN/ISSN/Other

  • ISSN: 1473-5687