title: Intestinal Absorption of Fibrinolytic and Proteolytic Lumbrokinase Extracted from Earthworm, Eisenia andrei.
abstract: To investigate the intestinal absorption of a fibrinolytic and proteolytic lumbrokinase extracted from Eisenia andrei, we used rat everted gut sacs and an in situ closed-loop recirculation method. We extracted lumbrokinase from Eisenia andrei, and then raised polyclonal antibody against lumbrokinase. Fibrinolytic activity and proteolytic activity in the serosal side of rat everted gut sacs incubated with lumbrokinase showed dose- and time-dependent patterns. Immunological results obtained by western blotting serosal side solution using rat everted gut sacs method showed that lumbrokinase proteins between 33.6 and 54.7 kDa are absorbed mostly by the intestinal epithelium. Furthermore, MALDI-TOF mass spectrometric analysis of plasma fractions obtained by in situ recirculation method confirmed that lumbrokinase F1 is absorbed into blood. These results support the notion that lumbrokinase can be absorbed from mucosal lumen into blood by oral administration.
authors.affiliation: Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea.
authors.forename: Xiang Mei
authors.initials: XM
authors.lastname: Yan
authors.forename: Chung-Hyo
authors.initials: CH
authors.lastname: Kim
authors.forename: Chul Kyu
authors.initials: CK
authors.lastname: Lee
authors.forename: Jang Sik
authors.initials: JS
authors.lastname: Shin
authors.forename: Il Hwan
authors.initials: IH
authors.lastname: Cho
authors.forename: Uy Dong
authors.initials: UD
authors.lastname: Sohn
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