天然产物研究与开发 ›› 2018, Vol. 30 ›› Issue (增刊1): 161-163.

• 研究简报 • 上一篇    下一篇

纳豆激酶 NK-01的体内吸收研究

潘霞1,滕潞瑶1,梁鹏宇1,任宇豪1,刘伟治1,2*   

  1. 1中国海洋大学海洋生命学院; 2青岛海洋科学与技术国家实验室,青岛 266001
  • 出版日期:2018-07-31 发布日期:2018-07-31
  • 基金资助:

    山东省重点研发计划基金(2017YYSP034)

Study on Absorption of Nattokinase NK-01 in vivo

PAN Xia1, TENG Lu-yao1, LIANG Peng-yu1, REN Yu-hao1, LIU Wei-zhi1,2 *   

  1. 1College of Marine Life Sciences,Ocean University of China;2Laboratory for Marine Biology and Biotechnology,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266001,China.  
  • Online:2018-07-31 Published:2018-07-31

摘要: 本实验以研究纳豆激酶 NK-01在大鼠肠道的吸收情况为目的,首先通过体外外翻肠囊法初步证实NK-01可以穿过大鼠肠道而被吸收。在此基础上,基于 FITC标记 NK-01,通过十二指肠注射,检测大鼠血浆中 NK-01的酶活与荧光强度。结果发现FITC标记的 NK-01注射到大鼠的十二指肠后, 2 h时大鼠血浆中能够检测到明显的酶活与荧光强度; 4 h时大鼠血浆中的酶活与荧光强度均达到最大值; 4 h后开始下降。同时,在大鼠体内荧光强度与酶活变化一致,因此可通过荧光强度的变化表征其在体内的代谢情况,这为后续纳豆激酶代谢机制的深入研究提供了一种新方法。

关键词: 纳豆激酶, 十二指肠, 吸收, 荧光标记

Abstract: We studied the absorption of nattokinase NK-01 in the intestine of rats.The absorption of NK-01 was verified by the everted gut sacs method in vitro.Based on this,NK-01 was labelled with FITC,and injected into duodenum of rats.Then,enzyme activity and fluorescence intensity of FITC-NK-01 were measured in rat plasma,which could reflect the absorption of NK-01 in vivo.After treated with FITC-NK-01,the enzyme activity and fluorescence intensity were detected in plasma of rats at 2 h.At 4 h,the enzyme activity and fluorescence intensity in the rat plasma reached a maximum,and then began to decline.Meantime,the change of fluorescence intensity is consistent with the enzyme activity of the FITC-labeled NK-01 in the rat.Therefore,the metabolism of NK-01 can be characterized by the change of fluorescence intensity in vivo,which provides a new method for the metabolic and quantitative studies of it in vivo.

Key words: Nattokinase, duodenum, absorption, fluorescence labeling

中图分类号:  R93