天然产物研究与开发 ›› 2020, Vol. 32 ›› Issue (7): 1235-1243.doi: 10.16333/j.1001-6880.2020.7.020

• 开发研究 • 上一篇    下一篇

截叶铁扫帚水部位促胃肠动力作用的研究

梁生林,颜峰光,李庆耀*


  

  1. 井冈山大学医学部,吉安 343009

  • 出版日期:2020-07-28 发布日期:2020-08-03
  • 基金资助:
    全国中药资源普查项目(财社[2018]43号);国家科技支撑计划课题子课题(2012BAC11B02-6);江西省高校教改课题(JXJG-14-9-14)

Study on the function of water fraction from Lespedeza cuneate in promoting gastrointestinal motility

LIANG Sheng-lin,YAN Feng-guang,LI Qing-yao*   

  1. Jinggangshan University Health Science Center,Ji’an 343009,China 

  • Online:2020-07-28 Published:2020-08-03

摘要: 研究截叶铁扫帚水部位及其各洗脱组分的动物体内外促胃肠动力作用。采用半固体营养糊法测定了截叶铁扫帚水部位及其各洗脱组分ig给药后小鼠的胃内残留率、小肠推进率,另外检测了水部位20%乙醇洗脱组分灌胃后小鼠血清MTL、Ghrelin和VIP的水平;离体实验测定了截叶铁扫帚水部位及其各洗脱组分对豚鼠胃底、胃体及胃窦和家兔空肠平滑肌的收缩性,以及水部位20%乙醇洗脱组分对阿托品、去甲肾上腺素及异丙肾上腺素预先处理的空肠平滑肌的收缩性。结果表明:与模型组比较,截叶铁扫帚水部位及其20%乙醇洗脱组分显著降低小鼠胃内残留率,明显提高小肠推进率,并且明显升高小鼠血清MTL、Ghrelin水平,明显降低小鼠血清VIP水平;离体实验发现截叶铁扫帚水部位及其20%乙醇洗脱组分显著增大豚鼠胃底、胃窦环行肌和胃体纵行肌收缩波幅度和频率、家兔空肠平滑肌收缩幅度和活动力,阿托品对截叶铁扫帚水部位20%乙醇洗脱组分所致的离体空肠平滑肌收缩作用无影响,而异丙肾上腺素明显对抗水部位20%乙醇洗脱组分收缩空肠平滑肌的作用,去甲肾上腺素也有一定拮抗作用。结果显示,截叶铁扫帚水部位具有明显促胃肠运动的作用,且其促胃肠运动作用的活性组分是20%乙醇洗脱组分,其活性成分很可能是酚酸类含有酚羟基、羧基等极性基团的化学成分;其促胃肠运动机制可能与促进MTL、Ghrelin的分泌和减少VIP分泌,以及抑制胃肠βα肾上腺素能通路有关。


关键词: 截叶铁扫帚, 水部位及其洗脱组分, 胃肠促动, 作用机制

Abstract:

This project aims to investigate the in vivo and in vitro function of water fraction and elution fractions from L. cuneata in promoting gastrointestinal motility.In vivo,gastric residual rate and small intestinal propulsive rate were determined by semi-solid nutritional paste method after water fraction and elution fractions i.g.administration in mice,meanwhile,serum levels of MTL,Ghrelin and VIP were detected.In vitro,contractility of gastric fundus,body and antrum in guinea pigs,and contractility of jejunal tube in rabbits with or without atropine,norepinephrine and isoprenaline pre-treatment was determined after treatment of water fraction and elution fractions from L. cuneata.Results showed that water fraction and 20% ethanol elution fraction from L. cuneata could significantly decrease the gastric residual rate and improve the intestinal propulsion rate in mice,simultaneously,serum levels of MTL and Ghrelin were increased significantly,however,serum VIP level was decreased.After administration of water fraction and 20% ethanol elution fraction from L. cuneata,contraction wave amplitude,contraction frequency of gastric fundus circular muscle,gastric antrum circular muscle and gastric body longitudinal muscle were promoted in guinea pigs.Contraction amplitude and activity of the isolated jejunal tube was elevated significantly in rabbits.Atropine had no effect on contraction of jejunal tube in vitro caused by the treatment of 20% ethanol elution fraction from L. cuneata,while isoprenaline antagonized the contraction,and norepinephrine moderately inhibited the contraction as well.In conclusion,these results indicated that the water fraction from L. cuneata could promote gastrointestinal motility,the active fraction was 20% ethanol elution fraction,and its active component might be phenolic acids,their activation mechanism on gastrointestinal propulsion may be related to the increase of MTL,Ghrelin and the reduction of VIP levels,as well as the inhibiting function on the gastrointestinal β and α-adrenergic pathway.

Key words: Lespedeza cuneata, water fraction and elution fractions, gastrointestinal propulsion, mechanism

中图分类号:  R285.5