生物技术通报 ›› 2017, Vol. 33 ›› Issue (12): 162-169.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0464

• 研究报告 • 上一篇    下一篇

淡黑巨藻醇提取物降血糖活性及其对小鼠肠道菌群的影响

陈玉青1, 严新1, 陈明军1, 林娈5, 杨成凤1,3, 李秋哲1, 刘斌1,2, 赵超1,4,5   

  1. 1. 福建农林大学食品科学学院,福州 350002;
    2. 国家菌草工程技术研究中心,福州 350002;
    3. 中国农业大学食品科学与营养工程学院,北京 100083;
    4. 美国加利福利亚大学化学系,戴维斯 95616;
    5. 泉州师范学院海洋与食品学院,泉州 362000
  • 收稿日期:2017-06-05 出版日期:2017-12-25 发布日期:2017-12-21
  • 作者简介:陈玉青,女,研究方向:海藻应用生物学;E-mail:382467216@qq.com
  • 基金资助:
    福建省杰出青年科学基金项目(2016J06009),福建省海洋藻类活性物质制备与功能开发重点实验室项目(2017FZSK05),福建省高水平大学建设项目(612014043),福建省海洋高新产业发展专项项目(闽海洋高新[2014]17号)

Anti-diabetic Activity of Alcohol Extracts from Lessonia nigrescens and Its Effects on Intestinal Microflora in Mice

CHEN Yu-qing1, YAN Xin1, CHEN Ming-jun1, LIN Luan5, YANG Cheng-feng 1, 3, LI Qiu-zhe 1, LIU Bin 1, 2, ZHAO Chao1, 4, 5   

  1. 1. College of Food Science,Fujian Agriculture and Forestry University,Fuzhou 350002;
    2. National Engineering Research Center of JUNCAO Technology,Fuzhou 350002;
    3. College of Food Science and Nutrition Engineering,China Agricultural University,Beijing 100083;
    4. Department of Chemistry,University of California,Davis 95616;
    5. College of Marine and Food, Quanzhou Normal University, Quanzhou 362000
  • Received:2017-06-05 Published:2017-12-25 Online:2017-12-21

摘要: 筛选具有降血糖活性的海藻活性物质,研究其对2型糖尿病小鼠肠道菌群的影响,为开发具有降糖作用的营养功能性食品提供依据。利用体外α-葡萄糖苷酶抑制活性和HepG2胰岛素抵抗细胞模型,对13种海藻通过分步提取法制备得到的35种海藻提取物进行筛选,并采用16S rRNA高通量测序技术分析降糖效果佳的提取物对2型糖尿病小鼠肠道菌群的影响。结果表明,35种海藻提取物中泡叶藻和淡黑巨藻55%乙醇提取物对α-葡萄糖苷酶活性抑制作用最为显著,淡黑巨藻55%乙醇提取物更能显著提高HepG2胰岛素抵抗细胞的葡萄糖消耗量,其显著增加2型糖尿病小鼠肠道内Bacteroidetes属的丰度,且使Firmicutes属细菌数量明显减少。淡黑巨藻55%醇提取物表现出显著的降血糖及调节肠道菌群的作用,具有潜在的食药用价值。

关键词: 淡黑巨藻, 醇提取物, 糖尿病, 肠道菌群, 16S rRNA高通量测序

Abstract: The aim of this article is to screen the seaweed active material and study the effect on intestinal flora in mice with type 2 diabetes for providing functional nutrition food with hypoglycemic effect. First,the 35 different extracts from 13 kinds of seaweeds prepared by step-by-step extraction method were screened by evaluating in vitro α-glucosidase activity and using HepG2 insulin resistance cell model. Then,the impacts of extracts with solid hypoglycemic effects on intestinal flora in type 2 diabetic mice were evaluated through 16s rRNA high-throughput sequencing. Among the 35 seaweed extracts,55%-ethanol extracts from Lessonia nigrescens and Ascophyllum nodosum showed the most significant inhibitory effects on α-glucosidase activity;moreover,the 55%-ethanol extracts from L. nigrescens significantly increased the glucose consumption of insulin-resistant HepG2 cells,also remarkably increased the abundance of Bacteroidetes in the intestine of mice and decreased the number of Firmicutes bacteria. The 55%-ethanol extract of Lessonia nigrescens showed the most significant hypoglycemic activity and the ability to maintain the balance of intestinal microflora,which may have potential medicinal value.

Key words: Lessonia nigrescens, alcohol extracts, Diabetes mellitus, intestinal flora, 16S rRNA high-throughput sequencing