WEN Jing, ZHANG Jian-wu, LYU Yuan-xia, et al. Ethanol Extract of Glycyrrhiza uralensis Fisch: Antidiarrheal Activity in Mice and Contraction Effect in Isolated Rabbit Jejunum. [J]. Chinese Journal of Integrative Medicine 29(4):325-332(2023)
DOI:
WEN Jing, ZHANG Jian-wu, LYU Yuan-xia, et al. Ethanol Extract of Glycyrrhiza uralensis Fisch: Antidiarrheal Activity in Mice and Contraction Effect in Isolated Rabbit Jejunum. [J]. Chinese Journal of Integrative Medicine 29(4):325-332(2023) DOI: 10.1007/s11655-022-3536-5.
Ethanol Extract of Glycyrrhiza uralensis Fisch: Antidiarrheal Activity in Mice and Contraction Effect in Isolated Rabbit Jejunum
摘要
Abstract
Objective:
2
To evaluate the antidiarrheal effect of ethanol extract of
Glycyrrhiza uralensis
Fisch root (GFR)
in vivo
and jejunal contraction
in vitro
.
Methods:
2
In vivo
50 mice were divided into negative control
positive control (verapamil)
low-
medium- and high-dose GFR (250
500
1
000 mg/kg) groups by a random number table
10 mice in each group. The antidiarrheal activity was evaluated in castor oil-induced diarrhea mice model by evacuation index (EI).
In vitro
the effects of GFR (0.01
0.03
0.1
0.3
1
3
and 10 g/L) on the spontaneous contraction of isolated smooth muscle of rabbit jejunum and contraction of pretreated by Acetylcholine (ACh
10 μmol/L) and KCl (60 mmol/L) were observed for 200 s. In addition
CaCl
2
was accumulated to further study its mechanism after pretreating jejunal smooth muscle with GFR (1 and 3 g/L) or verapamil (0.03 and 0.1 μmol/L) in a Ca
000 mg/kg) significantly reduced EI in castor oil-induced diarrhea model mice (
P
<
0.01). Meanwhile
GFR (0.01
0.03
0.1
0.3
1
3
and 10 g/L) inhibited the spontaneous contraction of rabbit jejunum (
P
<
0.05 or
P
<
0.01). Contraction of jejunums samples pretreated by ACh and KCl with 50% effective concentration (EC
50
) values was 1.05 (0.71–1.24)
0.34 (0.29–0.41) and 0.15 (0.11–0.20) g/L
respectively. In addition
GFR moved the concentration-effect curve of CaCl
2
down to the right
showing a similar effect to verapamil.
Conclusions:
2
GFR can effectively reduce diarrhea and inhibit intestinal contraction
and these antidiarrheal effects may be based on blocking L-type Ca
2+
channels and muscarinic receptors.
关键词
Keywords
Glycyrrhiza uralensis FischantidiarrhealspasmolysisChinese medicine
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