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1.河南中医药大学,郑州 450046
2.中国中医科学院 中药研究所,北京 100700
张阳,在读硕士,从事方药配伍规律研究,E-mail:543767384@qq.com
代丽萍,博士,教授,从事中药品质评价与物质基础研究,E-mail:liping_dai@hactcm.edu.cn; *
许二平,博士,教授,从事方药配伍规律研究,E-mail:xuerping@sina.com
收稿日期:2022-08-16,
网络出版日期:2022-11-03,
纸质出版日期:2023-01-20
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张阳,郭辉,连飞鹤等.基于p38 MAPK/NF-κB信号通路探讨中华雪胆醇提物对盐酸/乙醇诱导的大鼠急性胃溃疡的保护作用[J].中国实验方剂学杂志,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.
张阳,郭辉,连飞鹤等.基于p38 MAPK/NF-κB信号通路探讨中华雪胆醇提物对盐酸/乙醇诱导的大鼠急性胃溃疡的保护作用[J].中国实验方剂学杂志,2023,29(02):37-44. DOI: 10.13422/j.cnki.syfjx.20221249.
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.
目的
2
探讨中华雪胆醇提物(HC-EE)对盐酸/乙醇(HCl/EtOH)诱导的大鼠急性胃溃疡保护作用机制。
方法
2
采用脂多糖(LPS)诱导的RAW264.7细胞体外评价HC-EE对炎症介质生成的抑制作用;采用HCl/EtOH(以60% EtOH为溶剂,使HCl浓度为150 mmol·L
-1
)诱导的大鼠急性胃溃疡模型评价HC-EE对急性胃溃疡的保护作用,雄性SD大鼠随机等分为5组,即正常组、模型组、HC-EE低剂量(30 mg·kg
-1
,HC-EE 30)组、HC-EE高剂量(60 mg·kg
-1
,HC-EE 60)组及雷尼替丁(35 mg·kg
-1
)组,各组连续灌胃给药7 d,每天2次,末次给药30 min后,模型组及各给药组给予HCl/EtOH诱导大鼠急性胃溃疡。对各组动物进行麻醉,分离胃组织,采用电子成像技术记录大鼠胃内壁溃疡面,运用ImageJ 1.8.0计算药物的溃疡抑制率,通过苏木素-伊红(HE)和高碘酸-希夫(PAS)染色观察大鼠病理组织学变化,利用Griess法测定细胞培养液中的一氧化氮(NO)含量,酶联免疫吸附试验(ELISA)测定大鼠血清(或细胞培养液)中白细胞介素(IL)-1
β
、肿瘤坏死因子-
α
(TNF-
α
)、IL-6、血管细胞黏附分子-1(VCAM-1)、前列腺素E
2
(PGE
2
)的水平,通过蛋白质免疫印迹法(Western blot)检测各组大鼠胃组织磷酸化p38丝裂原活化蛋白激酶(p-p38 MAPK)/p38 MAPK、p-核转录因子-
κ
B(NF-
κ
B) p65/NF-
κ
B p65蛋白表达水平。
结果
2
体外实验结果显示,HC-EE能明显下调模型细胞NF-
κ
B信号介导的炎症介质NO,以及TNF-
α
、IL-1
β
、IL-6、VCAM-1的表达(
P
<
0.05,
P
<
0.01)。体内实验结果显示,与正常组比较,模型组大鼠胃组织损伤明显,溃疡面积显著增大,TNF-
α
、IL-6水平显著升高(
P
<
0.01),PGE
2
含量显著降低(
P
<
0.01),p38 MAPK、NF-
κ
B p65的磷酸化水平显著升高(
P
<
0.01);与模型组比较,HC-EE呈剂量依赖性地改善HCl/EtOH诱导的胃组织损伤和炎细胞浸润,提高溃疡抑制率,显著减少TNF-
α
、IL-6的释放量(
P
<
0.01),HC-EE 60组可以增加PGE
2
的含量(
P
<
0.05)、显著抑制胃组织蛋白p38 MAPK、NF-
κ
B p65的磷酸化水平(
P
<
0.05,
P
<
0.01)。
结论
2
HC-EE可改善HCl/EtOH诱导的大鼠急性胃溃疡,其作用机制可能与抑制p38 MAPK/NF-
κ
B信号通路介导的炎症介质表达有关。
Objective
2
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.
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