食品科学 ›› 2013, Vol. 34 ›› Issue (7): 157-161.doi: 10.7506/spkx1002-6630-201307033

• 生物工程 • 上一篇    下一篇

鹑鸡肠球菌m661的抗氧化、降胆固醇作用

刘长建,刘 秋,姜 波,闫建芳,孙天竹   

  1. 大连民族学院生命科学学院,辽宁 大连 116600
  • 收稿日期:2012-02-09 修回日期:2013-03-01 出版日期:2013-04-15 发布日期:2013-03-20
  • 通讯作者: 刘长建 E-mail:lcj@dlnu.edu.cn
  • 基金资助:
    国家自然科学基金面上项目(31070005)

Antioxidant and Cholesterol-reducing Properties of Enterococcus gallinarum m661

LIU Chang-jian,LIU Qiu,JIANG Bo,YAN Jian-fang,SUN Tian-zhu   

  1. College of Life Science, Dalian Nationalities University, Dalian 116600, China
  • Received:2012-02-09 Revised:2013-03-01 Online:2013-04-15 Published:2013-03-20
  • Contact: Chang-jian LIU E-mail:lcj@dlnu.edu.cn

摘要: 经厌氧培养,从猪胃液中分离得到1株生长良好的肠球菌m661,菌株能产乳酸、革兰氏染色阳性、接触酶阴性。经系统发育分析,结合菌落形态、细胞形态、生化反应实验,确定菌株m661为鹑鸡肠球菌。鹑鸡肠球菌m661具有抗氧化活性,对羟自由基(?OH)、DPPH自由基和超氧阴离子自由基(O2-?)的清除率与细胞浓度呈正相关。在细胞浓度为5×108CFU/mL时,菌株m661对?OH、DPPH自由基和O2-?的清除率分别为1.58%、36.6%和57.1%。菌株m661还具有清除培养基中34.4%的胆固醇、产生89.9mg/L苯乳酸等益生特性。菌株m661可作为益生菌进行开发利用。

关键词: 猪胃液, 肠球菌属, 16S rDNA, 系统发育树, 抗氧化作用

Abstract: An enterococcal strain named as m661 was isolated from porcine gastric juice. Strain m661 was found to be capable of producing lactic acid, Gram-positive and catalase-negative. Based on phylogenetic analysis, cellular and colonial morphology and biochemical test, m661 was identified as Enterococcus gallinarum. This strain had antioxidant potential, and its scavenging activity against hydroxyl, DPPH and superoxide anion radicals was in a cell density-dependent manner. At a cell density of 5 × 108 CFU/mL, the scavenging rates of stain m661 against hydroxyl, DPPH, and superoxide anion radicals were 1.58%, 36.6% and 57.1%, respectively. In addition, m661 was found to reduce cholesterol by 34.4% in the culture medium and produce 89.9 mg/L phenyllactic acid, suggesting excellent health-benefiting effects. The results of this study demonstrate that strain m661 has great potential to be developed as a new probiotic resource.

Key words: porcine gastric juice, Enterococcus, 16S rDNA, phylogenetic tree, antioxidant effect

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