Inactivation of proteolytic enzymes by Eubothrium rugosum (Cestoda) from the gut of burbot Lota lota

Title:

Inactivation of proteolytic enzymes by Eubothrium rugosum (Cestoda) from the gut of burbot Lota lota

Creator:

Izvekova, Galina I, Frolova, Tatyana V, and Izvekov, Evgeny I

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:2a99eccf-1f69-4006-88c1-e9ddac8dd75c
uuid:2a99eccf-1f69-4006-88c1-e9ddac8dd75c
issn:1803-6465
doi:10.14411/fp.2017.016

Subject:

ryby, trávicí enzymy, inhibitory proteáz, fishes, digestive enzymes, protease inhibitors, helminths, trypsin, 2, and 59

Type:

model:article and TEXT

Format:

print, počítač, and online zdroj

Description:

Parasitic organisms inhabiting the alimentary canal should permanently resist the destructive action of host digestive enzymes. The intestinal parasites were shown to produce specific protease inhibitors protecting them from proteolysis. However, little is known about this adaptive mechanism in cestodes so far, especially for the tapeworms dwelling inside the fish intestines. Here, we explored the ability to inactivate proteolytic enzymes in the fish tapeworm Eubothrium rugosum (Batsch, 1786) (Bothriocephalidea) parasitising the intestine of wild burbot, Lota lota (Linnaeus). The assays were conducted with different concentrations of commercial trypsin and homogenate of intestinal mucosa both being the sources of proteinases. The incubation of live E. rugosum in trypsin solutions of two different concentrations caused a significant decrease in the enzyme activity. The extent of activity reduction was dependent on trypsin concentration. At the same time, the inhibitory effect of the worm incubation medium turned out to be statistically insignificant. These findings suggest partial adsorption of the enzyme to the tegument surface, with its further inactivation. In contrast to the incubation medium, the worm extract suppressed over 80% of trypsin activity and nearly half of the proteolytic activity in the mucosa homogenate. Notably, the inhibitory activity of the tapeworms hardly depended on their size characteristics. Finally, the research has demonstrated secretion of proteinase inhibitor in E. rugosum, which appears to be essential for its survival in enzymatically hostile environment., Galina I. Izvekova, Tatyana V. Frolova, Evgeny I. Izvekov., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

1-8

Source:

Folia parasitologica | 2017 Volume:64 | Number:1

Harvested from:

CDK

Metadata only:

false