Effect of Tongbiantang on PKA/MPKA Signal Pathway in Colon Tissue of STC Rat Model

Ye-min WAN; Li ZENG; Hai-hua QIAN

doi:10.13422/j.cnki.syfjx.20190505

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Effect of Tongbiantang on PKA/MPKA Signal Pathway in Colon Tissue of STC Rat Model

Pharmacology | 更新时间：2021-02-09

- Effect of Tongbiantang on PKA/MPKA Signal Pathway in Colon Tissue of STC Rat Model
- Chinese Journal of Experimental Traditional Medical Formulae Vol. 25, Issue 5, Pages: 135-142(2019)
- 作者机构：
  
  南京中医药大学　附属医院，南京　 210029
- 作者简介：
- 基金信息：
- DOI：10.13422/j.cnki.syfjx.20190505
  CLC： R2-0;R22;R285.5;R289
- Received：10 August 2018，
  
  Published Online：20 November 2018，
  
  Published：05 March 2019
- 稿件说明：
移动端阅览
Ye-min WAN, Li ZENG, Hai-hua QIAN. Effect of Tongbiantang on PKA/MPKA Signal Pathway in Colon Tissue of STC Rat Model[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(5): 135-142.
DOI：

Ye-min WAN, Li ZENG, Hai-hua QIAN. Effect of Tongbiantang on PKA/MPKA Signal Pathway in Colon Tissue of STC Rat Model[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(5): 135-142. DOI： 10.13422/j.cnki.syfjx.20190505.

摘要

目的：

探讨通便汤对慢传输型便秘(slow transit constipation

STC)大鼠模型结肠组织中蛋白激酶A(protein kinase A

PKA)／丝裂原活化激酶(mitogen-activated protein kinase

MAPK)信号通路的影响及相关机制。

方法：

80只SD大鼠随机分为正常组和造模组，正常组20只，造模组60只，雌雄各半；正常组给予普通饲料喂养，模型组给予混有复方苯乙哌啶的饲料，造模时间120d后，随机选取雌雄对半大鼠正常组10只，造模组20只，测定大鼠24h排便量、含水量及小肠炭末推进率，观察结肠留存粪便粒数，评价STC大鼠造模是否成功；停药1周后，将造模组40只大鼠随机分为模型组，通便汤组(33g·kg

－1

)，通便汤＋H89组（PKA信号通路阻滞剂，5mg·kg

－1

），通便汤＋U0126组（MAPK信号通路阻滞剂，0.1mg·kg

－1

）各10只，雌雄各半，药物通便汤干预4周后，测定大鼠24h排便量、含水量及小肠炭末推进率，观察结肠留存粪便粒数；采用免疫组化(IHC)，蛋白免疫印迹法(Western blot)，实时荧光定量聚合酶链式反应(Real-time PCR)测定结肠内水通道蛋白3(AQP3)，AQP4，PKA及MAPKs信号通路的蛋白及mRNA表达情况。

结果：

与正常组比较，造模组大鼠24h排便量、粪便含水量、小肠炭末推进率及结肠存留粪便粒数均显著降低 (

0.01)；与模型组比较，通便汤组排便量、含水量及小肠炭末推进率均增加，结肠留存粪便粒数减少(

0.01)，AQP3，AQP4显著降低(

0.01)；与通便汤组比较，通便汤＋H89组和通便汤＋U0126组AQP3，AQP4，PKA蛋白与mRNA表达降低(

0.01)；与通便汤＋H89组比较，通便汤＋U0126组排便量、含水量、小肠炭末推进率及结肠留存粪便粒数，AQP3，AQP4，PKA

MAPK蛋白表达量与mRNA含量无明显差异。

结论：

采用复方苯乙哌啶成功复制出慢性传输型便秘模型，通便汤可以抑制PKA和MAPK信号通路，从而下调AQP3，AQP4表达，增加肠道蠕动和肠道水分，有效治疗STC。

Abstract

Objective:

To explore the effect of Tongbiantang on protein kinase A(PKA) and mitogen-activated protein kinase(MAPK) signal pathway in colon tissue of slow transit constipation(STC) rats and its related mechanism.

Method:

Eighty SD rats were randomly divided into blank group and model group

20 rats in blank group

60 rats in model group

half male and half female; blank group was fed with common diet

model group was fed with compound phenylethylpiperidine

after 120days of modeling

10 rats in blank group and 20 rats in model group were randomly selected

and 2 rats were determined. Four-hour stool volume

water content and small intestinal charcoal powder propelling rate were observed to observe the number of stool particles retained in colon and evaluate the success of STC rat modeling. After 1 week of drug withdrawal

40 rats in model group were randomly divided into model group(33g·kg

-1

)

Tongbiantang group

Tongbiantang+ H89group (PKA signaling pathway blocker

5mg·kg

-1

)

Tongbiantang+ U0126group (MPKA signaling pathway blocker

0.1mg·kg

-1

) each. After 4 weeks of intervention with Tongbiantang

the amount of stool excretion

water content and small intestinal charcoal powder propelling rate were measured in 10 rats

and the number of stool grains in colon was observed. The protein content andmRNA expression in aquaporins 3(AQP3)

AQP4

PKA and MAPKs signaling pathways in colon was determined by immunohistochemical staining (IHC)

Western blot and Real-time fluorescence quantitative PCR (Real-time PCR).

Result:

Compared with the blank group

the 24-hour stool volume

fecal water content

small intestinal charcoal propelling rate and the number of fecal particles in colon of rats in the model group were significantly decreased (

0.01); compared with the model group

the fecal volume

water content and small intestinal charcoal propelling rate of Tongbiantang group were increased

the number of fecal particles in colon decreased (

0.01)

AQP3 and AQP4 were significantly decreased (

0.01). Compared with the Tongbiantang group

the expressions of AQP3

AQP4

PKA andmRNA in the Tongbiantang+ H89group and the Tongbiantang+ U0126group were significantly lower (

0.01); compared with the Tongbiantang+ H89group

the stool volume

water content

small intestine charcoal propelling rate and the number of stool particles in colon

AQP3

AQP4

PKA

MPKAs protein table were significantly lower (

0.01). There was no significant difference between the amount ofmRNA and the content of protein.

Conclusion:

Tongbiantang can inhibit the PKA and MPKA signal pathways

thus down-regulate the expression of AQP3 and AQP4

increase intestinal peristalsis and intestinal water

and effectively treat STC.

关键词

Keywords

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