title: Gastric mucosal plasminogen activators in Helicobacter pylori infection.
abstract: Long-term H. pylori associated gastritis is recognized as a pathogenic factor in gastric carcinogenesis. In gastric carcinomas the amount and activity of the tissue-type plasminogen activator (t-PA) have been reported to be decreased, whereas those of the urokinase-type plasminogen activator (u-PA) were increased, contributing to the neoplastic and invasive process. The present study was performed to determine t-PA and u-PA levels and activity in gastric mucosa from 102 patients and to investigate whether these levels are influenced by H. pylori infection. The antigen concentration and activity of t-PA and u-PA in corpus mucosa were low (P < 0.001) compared with those in antral mucosa, although for the u-PA activity this did not reach statistical significance. In H. pylori-associated antral gastritis the mucosal t-PA antigen concentration and activity were found to be decreased (P < 0.001) compared with normal mucosa, whereas in H. pylori-associated pangastritis the corpus t-PA levels were not affected. The antigen concentration and activity of u-PA were found to be significantly (P < 0.005) increased, both in H. pylori-associated gastritis of antrum and corpus mucosa. Levels of u-PA in histologically normal corpus mucosa of patients with an H. pylori-associated antral gastritis were also found to be increased (P < 0.05). In conclusion, the alterations in the plasminogen activator profile found in H. pylori-associated gastritis, ie, a decrease in t-PA and an increase in u-PA, show a similar tendency as the previously found alterations in gastric carcinomas, which provides additional support for the possible involvement of H. pylori-associated gastritis in the pathogenesis of gastric carcinoma.
authors.affiliation: Department of Gastroenterology and Hepatology, University Hospital Leiden, The Netherlands.
authors.forename: J M
authors.initials: JM
authors.lastname: Götz
authors.forename: Y
authors.initials: Y
authors.lastname: Vergouwe
authors.forename: H W
authors.initials: HW
authors.lastname: Verspaget
authors.forename: I
authors.initials: I
authors.lastname: Biemond
authors.forename: C F
authors.initials: CF
authors.lastname: Sier
authors.forename: C B
authors.initials: CB
authors.lastname: Lamers
authors.forename: R A
authors.initials: RA
authors.lastname: Veenendaal
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005753:Gastric Mucosa / Q000378:metabolism*; D005756:Gastritis / Q000378:metabolism* / Q000382:microbiology; D016481:Helicobacter Infections / Q000378:metabolism*; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008875:Middle Aged; D011706:Pyloric Antrum / Q000378:metabolism; D010959:Tissue Plasminogen Activator / Q000378:metabolism*; D014568:Urokinase-Type Plasminogen Activator / Q000378:metabolism*
chemical_list: D010959:Tissue Plasminogen Activator; D014568:Urokinase-Type Plasminogen Activator