天然产物研究与开发 ›› 2016, Vol. 28 ›› Issue (8): 1223-1227.doi: 10.16333/j.1001-6880.2016.8.009

• 研究简报 • 上一篇    下一篇

Nano LC-MS/MS从具有增强小鼠记忆作用的人参组分中鉴定22种新肽

罗浩铭1,陈英红2,洪铁2,姜瑞芝2,王颖2*   

  1. 1 长春中医药大学,长春 130117;2吉林省中医药科学院中医药基础所,长春 130012
  • 出版日期:2016-08-30 发布日期:2017-01-17

Structural Identification of 22 Novel Peptides from Ginseng Component with Memory-enhancement Effect Using by Nano LC-MS/MS

LUO Hao-ming1,CHEN Ying-hong2,HONG Tie2,JIANG Rui-zhi 2,WANG Ying 2*   

  1. 1 Changchun University of Chinese Traditional Medicine,Changchun 130117,China;2 Jilin Academy  of Chinese Medicine and Material Medica Science,Changchun 130012,China
  • Online:2016-08-30 Published:2017-01-17

摘要: 在我们先前的研究中发现人参非皂苷部分具有改善小鼠记忆活性。为确定活性组分,实验采用对人参水提物经超滤、透析、Sephadex G-15凝胶柱层析分离纯化,通过UV对糖与蛋白的监测,得到P1、P2两部分。药理实验结果表明,P2经腹腔注射给药7 d,40 mg/kg,能明显改善小鼠记忆获得障碍和小鼠记忆巩固障碍。P2采用纳升级超高效液相-质谱联用仪(Nano LC-MS/MS)进行结构分析,首次从人参中得到22种新肽,且具有辅助改善学习记忆的作用。

关键词: 人参, LC-MS/MS, 增强记忆活性,

Abstract: Our previous study showed that Panax ginseng aqueous extract showed memory-enhancement effect on mice.In this study,two ginseng components (named P1 and P2) were separated from the aqueous extract of P.ginseng through ultrafiltration,dialysis and Sephadex G-15 column chromatography.Their memory-enhancement effect was tested by Morris water maze and step-down experiments.The results of pharmacologic experiment showed that P2 improved the disturbance of memory acquisition and consolidation in mice by i.p.at the dose of 40 mg/kg for 7 days.Hence,P2 was the active site of the ginseng aqueous extract with memory-enhancement effect.The structural identification of P2 by nano-ultra performance liquid chromatography coupled to LTQ Orbitrap Elite mass spectrometry (Nano LC-MS/MS) was undertaken,the MS/MS ion spectra were evaluated through Uniprot all species sequence database and Proteome Discoverer software,then 22 novel peptides were firstly identified from P.ginseng.

Key words: Panax ginseng, LC-MS/MS, memory-enhancement activity, peptide

中图分类号: 

R932