Tissue-type plasminogen activator of colonic mucosa in ulcerative colitis - Evidence of endothelium-derived fibrinolytic activation

Iwao Kurose, Soichiro Miura, Makoto Suematsu, Hiroshi Serizawa, Dai Fukumura, Hiroshi Asako, Toshifumi Hibi, Masaharu Tsuchiya

Research output: Contribution to journalArticle

9 Citations (Scopus)


Microvascular endothelial alterations are thought to be a crucial step for development of hemorrhagic changes in various pathological states. In this study, we determined the activity and amount of tissue-type plasminogen activator (t-PA) in the biopsy specimens from sigmoid colon of patients with ulcerative colitis to evaluate endothelial alterations and vascular changes of permeability. The results of this investigation revealed that mucosal amount of t-PA in the active stage of ulcerative colitis was two- to threefold higher than in healthy controls, while t-PA levels in plasma samples showed no remarkable differences among the groups. Increased t-PA activity appeared to correlate well to the degree of inflammation of colonic mucosa, and t-PA amount was still increased in the inactive stage. The present study indicates that t-PA determination in colonic biopsy specimens may be useful for the evaluation of clinical activity of ulcerative colitis in terms of the mucosal microvascular endothelial changes.

Original languageEnglish
Pages (from-to)307-311
Number of pages5
JournalDigestive Diseases and Sciences
Issue number2
Publication statusPublished - 1992 Feb 1



  • endothelial cell
  • fibrinolysis
  • plasminogen activator inhibitor-1
  • tissue-type plasminogen activator
  • ulcerative colitis

ASJC Scopus subject areas

  • Physiology
  • Gastroenterology

Cite this