食品科学 ›› 2011, Vol. 32 ›› Issue (7 ): 7-10.doi: 10.7506/spkx1002-6630-201107002

• 基础研究 • 上一篇    下一篇

富硒螺旋藻多肽对血管紧张素转化酶的抑制作用

高冬芳,张逸波,凌钦婕,邹 颖,黄 峙*   

  1. 暨南大学生命科学技术学院
  • 收稿日期:2010-07-04 修回日期:2011-02-22 出版日期:2011-04-15 发布日期:2011-03-30
  • 通讯作者: 黄峙 E-mail:thsh@jnu.edu.cn
  • 基金资助:
    国家自然科学基金项目(20975045;20675045);暨南大学大学生创新工程项目(cx10088)

Angiotensin Convert Enzyme Inhibition of Peptides Derived from Water Soluble Total Protein of  Selenium-enriched Spirulina platensis

GAO Dong-fang,ZHANG Yi-bo,LING Qin-jie,ZOU Ying,HUANG Zhi*   

  1. College of Life Science and Technology, Jinan University, Guangzhou 510632, China
  • Received:2010-07-04 Revised:2011-02-22 Online:2011-04-15 Published:2011-03-30
  • Contact: HUANG Zhi* E-mail:thsh@jnu.edu.cn

摘要: 从富硒螺旋藻(SeSP)中提取总蛋白(SeSP-TP),用不同蛋白酶水解SeSP-TP制备富硒螺旋藻多肽(SeSP-Ps),体外测定SeSP-Ps对血管紧张素转化酶(ACE)的抑制作用。结果表明:5种常见蛋白酶在最适条件下对SeSP-TP水解度明显不同,其中胃蛋白酶-胰蛋白酶-胰凝乳蛋白酶联合使用时的酶水解度最高;虽然不同蛋白酶水解制备的SeSP-Ps均对ACE具有较强的抑制作用,但不同酶水解的SeSP-Ps对ACE的50%抑制浓度(IC50)存在明显差异,其中胃蛋白酶-胰蛋白酶-胰凝乳蛋白酶联合酶解制备的SeSP-Ps对ACE的IC50值最低,为74.6μg/mL。结果提示:SeSP在体内经胃肠蛋白酶消化产生的多肽,对ACE具有较强的抑制活性,且SeSP-Ps对ACE的抑制作用呈现显著的剂量-效应依赖性。

关键词: 多肽, 血管紧张素转化酶(ACE), 螺旋藻,

Abstract: The water soluble total protein (TP) of selenium-enriched Spirulina platensis (SeSP), named as SeSP-TP, was extracted by phosphate buffer and then hydrolyzed by 5 different proteases to produce SeSP peptides (SeSP-Ps). The angiotensin convert enzyme (ACE) inhibition of SeSP-Ps was measured in vitro. The results showed that treatments with different proteases caused obvious difference of hydrolysis degree (HD) to SeSP-TP, and the combined use of pepsin, trypsin and chimotrypsin led to the highest H. Furthermore, we found that all SeSP-Ps produced by various proteases could inhibit ACE. The 50% ACE inhibition concentration (IC50) of SeSP-Ps derived from the combination of pepsin, trypsin and chimotrypsin was 74.6μg/mL, which was the lowest in comparison with SeSP-Ps obtained with each of the three enzymes or papain. The present results implied that the excellent functional food SeSP contains highly active dose-dependent ACE inhibition peptides.

Key words: angiotensin convert enzyme, Spirulina platensis, selenium, peptide

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