Acid-gastric antisecretory effect of the ethanolic extract from Arctium lappa L. root: role of H+, K+-ATPase, Ca2+ influx and the cholinergic pathway
Background Arctium lappa L., popularly known as burdock, is a medicinal plant used worldwide. The antiulcer and gastric-acid antisecretory effects of ethanolic extract from roots of Arctium lappa (EET) were already demonstrated. However, the mechanism by which the extract reduces the gastric acid se...
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Published in | Inflammopharmacology Vol. 26; no. 2; pp. 521 - 530 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Cham
Springer International Publishing
01.04.2018
|
Subjects | |
Online Access | Get full text |
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Summary: | Background
Arctium lappa
L., popularly known as burdock, is a medicinal plant used worldwide. The antiulcer and gastric-acid antisecretory effects of ethanolic extract from roots of
Arctium lappa
(EET) were already demonstrated. However, the mechanism by which the extract reduces the gastric acid secretion remains unclear. Therefore, this study was designed to evaluate the antisecretory mode of action of EET.
Materials and methods
The effects of EET on H
+
, K
+
-ATPase activity were verified in vitro, whereas the effects of the extract on cholinergic-, histaminergic- or gastrinergic-acid gastric stimulation were assessed in vivo on stimulated pylorus ligated rats. Moreover, ex vivo contractility studies on gastric muscle strips from rats were also employed.
Results
The incubation with EET (1000 µg/ml) partially inhibited H
+
, K
+
-ATPase activity, and the intraduodenal administration of EET (10 mg/kg) decreased the volume and acidity of gastric secretion stimulated by bethanechol, histamine, and pentagastrin. EET (100–1000 µg/ml) did not alter the gastric relaxation induced by histamine but decreased acetylcholine-induced contraction in gastric fundus strips. Interestingly, EET also reduced the increase in the gastric muscle tone induced by 40 mM KCl depolarizing solution, as well as the maximum contractile responses evoked by CaCl
2
in Ca
2+
-free depolarizing solution, without impairing the effect of acetylcholine on fundus strips maintained in Ca
2+
-free nutritive solution.
Conclusion
Our results reinforce the gastric antisecretory properties of preparations obtained from
Arctium lappa
, and indicate that the mechanisms involved in EET antisecretory effects include a moderate reduction of the H
+
, K
+
-ATPase activity associated with inhibitory effects on calcium influx and of cholinergic pathways in the stomach muscle. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0925-4692 1568-5608 |
DOI: | 10.1007/s10787-017-0378-4 |