Protective Effect of Ethanolic Extract of Hemsleya chinensis on HCl/Ethanol-induced Acute Gastric Ulcer in Rats Based on p38 MAPK/NF-κB Signaling Pathway
Research topics on the comprehensive utilization of Chinese medicines and their non-medicinal parts|更新时间:2022-12-21
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Protective Effect of Ethanolic Extract of Hemsleya chinensis on HCl/Ethanol-induced Acute Gastric Ulcer in Rats Based on p38 MAPK/NF-κB Signaling Pathway
Chinese Journal of Experimental Traditional Medical FormulaeVol. 29, Issue 2, Pages: 37-44(2023)
ZHANG Yang,GUO Hui,LIAN Feihe,et al.Protective Effect of Ethanolic Extract of Hemsleya chinensis on HCl/Ethanol-induced Acute Gastric Ulcer in Rats Based on p38 MAPK/NF-κB Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(02):37-44.
ZHANG Yang,GUO Hui,LIAN Feihe,et al.Protective Effect of Ethanolic Extract of Hemsleya chinensis on HCl/Ethanol-induced Acute Gastric Ulcer in Rats Based on p38 MAPK/NF-κB Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(02):37-44. DOI: 10.13422/j.cnki.syfjx.20221249.
Protective Effect of Ethanolic Extract of Hemsleya chinensis on HCl/Ethanol-induced Acute Gastric Ulcer in Rats Based on p38 MAPK/NF-κB Signaling Pathway
To investigate the mechanism of protective effect of ethanol extracts of
Hemsleya chinensis
(HC-EE) on hydrochloric acid/ethanol (HCl/EtOH)-induced acute gastric ulcer in rats.
Method
2
Lipopolysaccharide (LPS)-induced RAW264.7 cells were used to evaluate inhibitory effect of HC-EE on the production of inflammatory mediators
in vitro
. A rat acute gastric ulcer model induced by HCl/EtOH (60% ethanol in 150 mmol·L
-1
HCl) was used to evaluate protective effect of HC-EE on acute gastric ulcer. Rats were divided into five groups, including normal group, model group, HC-EE low dose (HC-EE 30, 30 mg·kg
-1
) group, HC-EE high dose (HC-EE 60, 60 mg·kg
-1
) group and ranitidine (35 mg·kg
-1
) group. For model and drug-treated groups, vehicle solvent or drugs were orally administered twice daily for 7 consecutive days before the rats were subjected to HCl/EtOH to induce acute gastric ulcer. After being anesthetized, ulcer surface of each rat was obtained and recorded using electronic imaging technology, and the ulcer inhibition rate was calculated by ImageJ 1.8.0. Hematoxylin-eosin (HE) and periodic acid-Schiff (PAS) staining were used to observe the pathological histological changes in rats. Content of nitric oxide (NO) in cell culture medium was measured by the Griess method. The levels of interleukin-1
β
(IL-1
β
), tumor necrosis factor-
α
(TNF-
α
), IL-6, vascular cell adhesion molecule-1 (VCAM-1) and prostaglandin E
2
(PGE
2
) in rat serum (or cell culture medium) were determined by enzyme linked immunosorbent assay (ELISA). The protein expressions of phosphorylation (p)-p38 mitogen activated protein kinase (MAPK)/p38 MAPK and p-nuclear transcription factor-
κ
B (NF-
κ
B) p65/NF-
κ
B p65 in rat gastric tissue were detected by Western blot.
Result
2
In vitro
assay showed HC-EE could significantly down-regulate the expressions of NO, TNF-
α
, IL-1
β
, IL-6 and VCAM-1 in LPS-induced cells (
P
<
0.05,
P
<
0.01).
In vivo
experimental results showed that, compared with the normal group, gastric tissue of the model group was severely damaged, and the area of gastric ulcer was significantly enlarged, levels of TNF-
α
, IL-6 were significantly increased (
P
<
0.01), and the level of PGE
2
was significantly decreased (
P
<
0.01), the phosphorylation levels of of p38 MAPK, NF-
κ
B p65 in gastric tissue were significantly increased (
P
<
0.01). Compared with the model group, HC-EE dose-dependently improved HCl/EtOH-induced gastric tissue injury and inflammatory cell infiltration, and it could increase ulcer inhibition rate, significantly decreased the release of TNF-
α
and IL-6 (
P
<
0.01), HC-EE 60 group could increase the content of PGE
2
(
P
<
0.05), and significantly inhibit the phosphorylation levels of p38 MAPK and NF-
κ
B p65 (
P
<
0.05,
P
<
0.01).
Conclusion
2
HC-EE can exert protective effect on HCl/EtOH-induced acute gastric ulcer in rats, and its mechanism may be related to the inhibition of expression of inflammatory mediators mediated by p38 MAPK/NF-
κ
B signaling pathway.
关键词
Keywords
references
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Related Institution
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