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Enhancement of the Pharmacological Efficacy of FGF-21 by Genetic Modification and PEGylation

文献类型： 外文期刊

作者： Ye, Xianlong 1 ; Qi, Jianying 1 ; Sun, Guopeng 2 ; Ren, Guiping 1 ; Zhu, Shenglong 1 ; Wu, Yunzhou 1 ; Yu, Dan 1 ; Zhao, 1 ;

作者机构： 1.Northeast Agr Univ, Coll Life Sci, Biopharmaceut Lab, Harbin 150030, Heilongjiang, Peoples R China

2.Xinxiang Univ, Coll Life Sci & Biotechnol, Biotechnol Res Ctr, Xinxiang 453003, Peoples R China

3.Chinese Acad Fishery Sci, Heilongjiang River Fishery Res Inst, Harbin 150070, Peoples R China

4.Northeast Agr Univ, Key Lab Agr Biol Funct Gene, Harbin 150030, Heilongjiang, Peoples R China

关键词： Diabetes;FGF-21;genetic modification;immunogenicity;PEGylation;stability

期刊名称：CURRENT PHARMACEUTICAL BIOTECHNOLOGY （ 影响因子：2.837； 五年影响因子：2.626 ）

ISSN： 1389-2010

年卷期： 2013 年 14 卷 15 期

页码：

收录情况： SCI

摘要： FGF-21 is a potential candidate for the treatment of type 2 diabetes mellitus. However, the clinical application of wild-type human FGF-21 is challenging due to some limitations, such as its poor hypoglycemic potency and short in vivo half-life. In this paper, we have produced an FGF-21 mutant (ahmFGF-21) by exchanging the functional domain of hFGF-21 with that of mFGF-21 to improve the potency of FGF-21. Results showed that the ahmFGF-21 protein was more potent than wild-type hFGF-21 in stimulating glucose uptake in vitro and lowering blood glucose levels of diabetic animals. To decrease its immunogenicity and increase its biostability, the N-terminus of ahmFGF-21 was modified in a site-specific manner with 20kDa mPEG-propionaldehyde (mPEG-ALD). We found that the preservation time of ahmFGF-21 in vitro was significantly prolonged after PEGylation. The serum antibody levels against ahmFGF-21 in immunized rabbits with the PEGylated ahmFGF-21 were significantly reduced than those with the unmodified ahmFGF-21, and the target protein concentration in the rabbits administrated with the PEGylated ahmFGF-21 increased 9.5-fold higher than that of the unmodified ahmFGF-21. The animal experimental results showed that PEGylation of ahmFGF-21 enhanced the hypoglycemic effect in diabetic mice. These results suggest that the in vitro and in vivo hypoglycemic effects of FGF-21 are significantly enhanced by genetic modification and the metabolic pharmacology of FGF-21 in type 2 diabetic mice is improved by PEGylation at a specific site.

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