遗传 ›› 2015, Vol. 37 ›› Issue (2): 183-191.doi: 10.16288/j.yczz.14-206

• 研究报告 • 上一篇    下一篇

长效促胰岛素降糖酵母的构建及其对糖尿病模型小鼠的治疗效果

吴日1,马超1,李晓丹1,段会坤1,姬艳丽1,王宇1,姜苹哲1,王海松1,屠培培1,李淼1,尼钢钢1,马百成2,李明刚1   

  1. 1. 南开大学生命科学学院,教育部生物活性材料重点实验室,天津 300071;
    2. 天津市儿童医院,天津 300074
  • 收稿日期:2014-06-25 出版日期:2015-02-20 发布日期:2015-01-19
  • 通讯作者: 李明刚,教授,博士生导师,研究方向:生物技术与新药。E-mail: mgl@nankai.edu.cn
  • 作者简介:吴日,教育部公派访问学者,金日成综合大学平壤医学院副教授。E-mail: tj20110901@163.com;马超,硕士研究生,专业方向:生物技术与新药。E-mail: mac1002@outlook.com;吴日和马超并列第一作者。
  • 基金资助:
    天津市科技支撑重点计划项目(编号:14ZCZDSY00013)资助

Construction of yeast strains expressing long-acting glucagon-like peptide-1 (GLP-1) and their therapeutic effects on type 2 diabetes mellitus mouse model

Ri Wu1,Chao Ma1,Xiaodan Li1,Huikun Duan1,Yanli Ji1,Yu Wang1,Pingzhe Jiang1,Haisong Wang1,Peipei Tu1,Miao Li1,Ganggang Ni1,Baicheng Ma2,Minggang Li1   

  1. 1. Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, Tianjin 300071, China;
    2. Tianjin Children’s Hospital, Tianjin 300074, China
  • Received:2014-06-25 Online:2015-02-20 Published:2015-01-19

摘要: 益生菌生物药物是指通过口服表达药用多肽(蛋白)的重组益生菌活细胞达到治疗疾病的新型口服给药系统。为了构建一种能有效防治2型糖尿病的酵母生物药物,文章首先构建了酿酒酵母(S.cerevisiae)整合型表达载体pNK1-PGK,并且通过绿色荧光蛋白(GFP)证明其表达功能正常,利用该载体将10×GLP-1 (Glucagon-like peptide-1)基因转化到酿酒酵母INVSc1中,通过营养缺陷型和Western blotting成功筛选出表达10×GLP-1的长效促胰岛素降糖酵母(Long-acting GLP-1 hypoglycemic yeast, LHY)。该酵母生长迅速,外源基因10×GLP-1表达稳定,表达量达到1.56 mg/g细胞湿重。通过链脲佐菌素和高脂高糖饮食联合诱导的方法构建了2型糖尿病小鼠模型,用LHY对其进行口服灌胃治疗,证明LHY具有较好疗效,明显降低血糖水平。

关键词: 2型糖尿病, 胰高血糖素样肽-1(GLP-1), 长效促胰岛素降糖酵母(LHY), 重组酿酒酵母, 糖尿病小鼠模型

Abstract: Probiotics, i.e., bacteria expressing therapeutic peptides (protein), are used as a new type of orally administrated biologic drugs to treat diseases. To develop yeast strains which could effectively prevent and treat type 2 diabetes mellitus, we firstly constructed the yeast integrating plasmid pNK1-PGK which could successfully express green fluorescent protein (GFP) in Saccharomyces cerevisiae. The gene encoding ten tandem repeats of glucagon-like peptide-1(10×GLP-1) was cloned into the vector pNK1-PGK and the resulting plasmids were then transformed into the S. cerevisiae INVSc1. The long-acting GLP-1 hypoglycemic yeast (LHY) which grows rapidly and expresses 10×GLP-1 stably was selected by nutrition screening and Western blotting. The amount of 10×GLP-1 produced by LHY reached 1.56 mg per gram of wet cells. Moreover, the oral administration of LHY significantly reduced blood glucose level in type 2 diabetic mice induced by streptozotocin plus high fat and high sugar diet.

Key words: type 2 diabetes mellitus, glucagon-like peptide-1(GLP-1), long-acting GLP-1 hypoglycemic yeast (LHY), recombinant yeast, mouse model of type 2 diabetes mellitus