食品科学 ›› 2018, Vol. 39 ›› Issue (21): 155-159.doi: 10.7506/spkx1002-6630-201821023

• 营养卫生 • 上一篇    下一篇

原花青素A2肠道菌群代谢物及其抗氧化活性

杨光美1,2,李桐云2,张玉莹2,杨瑞丽2,李 武1,*   

  1. 1.海南大学食品学院,海南 海口 570228;2.广东省食品质量安全重点实验室,华南农业大学食品学院,广东 广州 510642
  • 出版日期:2018-11-15 发布日期:2018-11-21
  • 基金资助:
    海南省自然科学基金项目(317007);国家自然科学基金面上项目(31471705);现代农业产业技术体系加工技术岗位专家项目(CARS-33)

Analysis of in Vitro Intestinal Microbial Metabolites of Procyanidin A2 and Evaluation of Their Antioxidant Activity

YANG Guangmei1,2, LI Tongyun2, ZHANG Yuying2, YANG Ruili2, LI Wu1,*   

  1. 1. College of Food Science and Technology, Hainan University, Haikou 570228, China; 2. Key Laboratory of Food Quality and Safety of Guangdong Province, College of Food Science, South China Agricultural University, Guangzhou 510642, China
  • Online:2018-11-15 Published:2018-11-21

摘要: 采用超高效液相色谱-四极杆-飞行时间质谱联用仪对原花青素A2(procyanidin A2,PCA2)体外大鼠肠道菌群代谢物进行分析,比较不同培养时间点PCA2肠道菌群代谢物总抗氧化能力(total antioxidant capacity,T-AOC)、1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基、2,2’-联氮双(3-乙基苯并噻唑啉-6-磺酸)二铵盐(2,2’-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid)diammonium salt,ABTS)自由基清除能力的变化。结果表明:随着菌群培养时间的延长,PCA2质量浓度逐渐降低,在6 h时PCA2的浓度降低77.28%,24 h降低了90.07%。PCA2经肠道菌群代谢主要产生8 种新化合物,经鉴定为对羟苯基乙酸、表儿茶素、3-(4-羟苯基)丙酸、B型原花青素、5,7,2’-三羟基黄烷和3 种未知结构化合物。PCA2肠道菌群代谢产物的抗氧化能力显著高于PCA2,其中代谢6 h时,其T-AOC、DPPH自由基和ABTS+?清除能力分别提高了2.01、2.16、1.34 倍。肠道菌群代谢物在PCA2生物活性作用过程中具有重要作用。

关键词: 原花青素A2, 肠道菌群, 代谢产物, 抗氧化活性

Abstract: The metabolites of procyanidin A2 (PCA2) were analyzed using ultra performance liquid chromatographyquadrupole- time-of-flight tandem mass spectrometry (UPLC-Q-TOF-MS) after incubation with the rat intestinal microbiota in vitro. The total antioxidant capacity (T-AOC) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2’-azino-bis-(3- ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) radical scavenging ability of PCA2 and its metabolites at different incubation times were measured and compared. PCA2 was degraded by 77.28% at 6 h and by 90.07% at 24 h of incubation. Eight metabolites were identified namely: 4-hydroxyphenylacetic acid, epicatechin, 3-(4-hydroxyphenyl) propionic acid, B type proanthocyanidins, 5,7,2’-trihydroxyflavanone, and three unknown compounds. The antioxidant capacity of PCA2 was enhanced significantly after incubation. T-AOC, DPPH, ABTS radical scavenging ability after incubation for 6 h were significantly increased by 2.01, 2.16 and 1.34 times, respectively compared with that before incubation. The results suggested that the activity of PCA2 might be partially attributed to its intestinal microbial metabolites.

Key words: procyanidins A2, intestinal microbiota, metabolites, antioxidant activity

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