Effect of leupeptin, TLCK and lactoferrin on tryptase release from human colon mast cells
- VernacularTitle:亮肽素、TLCK和乳铁蛋白对人结肠肥大细胞类胰蛋白酶释放的影响
- Author:
Hua XIE
;
Shaoheng HE
- Publication Type:Journal Article
- Keywords:
Leupeptins;
Lactoferrin;
Mast cells
- From:
Chinese Journal of Pathophysiology
2000;0(07):-
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To investigate the ability of leupeptin, TLCK and lactoferrin on tryptase release from human colon mast cells. METHODS: Human mast cells were dispersed from colon tissue with collagenase and hyaluronidase, and were challenged with stimulus for 15 min at 37 ℃. Tryptase concentrations were measured with a sandwich ELISA procedure. RESULTS: Leupeptin, TLCK and lactoferrin were not able to provoke significant tryptase release from human colon mast cells. But they were able to inhibit anti-IgE and calcium ionophore (CI)-induced tryptase release in a concentration-dependent manner. Preincubation of inhibitors of leupeptin and TLCK with cells for 20 min before challenging with anti-IgE failed to enhance their inhibitory actions. The extent of inhibition by leupeptin was increased when colon mast cells were preincubated for 20 min before CI being added. However, the same treatment failed to improve the action of TLCK. CONCLUSION: We found for the first time that leupeptin, TLCK and lactoferrin were able to inhibit anti-IgE and calcium ionophore-induced tryptase release from human colon mast cells, which may indicate a potential of a novel therapy for the treatment of inflammatory bowel disease or other mast cells-related diseases.
