FGF1-FGF21 chimeric protein and application of same to treatment of diabetes
1. The technology of FGF1-FGF21 and FGF21, applied in the field of protein, can solve the problems of loss of cell division and proliferation, weak binary complexes, etc., and achieve the prospect of high-efficiency medicine, long-term effect, and maintain the effect of hypoglycemia
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Embodiment 1
[0027]Example 1 Preliminary research on the FGF1-FGF21 chimeric protein of the present invention and its activity
[0028] Cloning, expression and purification of FGF1-FGF21 chimeric protein (abbreviated as FGF1) by conventional means ΔHBS -FGF21 C -tail ). Briefly, the full-length human wild-type FGF1 (abbreviated as FGF1 WT , 1-155) cDNA fragments were cloned into the pET30a expression vector, and then three mutations (i.e. encoding FGF1 ΔHS ), and then introduce the gene encoding the C tail (C-tail, Gly142-Ser182) part of FGF21 to obtain a chimeric construct (the amino acid sequence of the chimeric protein encoded by it is shown in SEQ ID NO: 1). The expression vector with the chimeric construct was transformed into Escherichia coliBL21(DE3), cultured at 37°C, when A 600 When reaching 0.5, add 1mM IPTG to continue culturing for 4 hours. After lysing, the cells were purified by anion exchange chromatography column (Source Q, GE Healthcare, Piscataway, NJ) and gel exclu...
Embodiment 2
[0034] Embodiment 2 FGF1 of the present invention ΔHS in vivo activity studies
[0035] (1) Normal mice
[0036] Daily administration of FGF1 to normal C57BL / 6J mice WT and FGF1 ΔHBS -FGF21 C-tail (2.0mg / kg body weight), lasted for 20 days, respectively used Ki6 immunohistochemical staining and Western blotting to analyze the hyperplasia of the mouse liver. FGF1 WT was observed to cause significant hyperplasia in mice, while FGF1 ΔHBS -FGF21 C-tail Hyperplasia did not appear relative to the PBS control group.
[0037] (2) FGF1 ΔHBS -FGF21 C-tail Effects on blood glucose levels and insulin sensitivity in db / db mice
[0038] Diabetic model (db / db) mice (C57BLKS / J-lepr db / lepr db ) and its control mice with normal phenotype (db / m) were purchased from Model Animal Research Center of Nanjing University.
[0039] In db / db mice, daily subcutaneous injections of FGF1 WT and FGF1 ΔHBS -FGF21 C-tail (0.5mg / kg body weight), last for 4 weeks, measure blood glucose within ...
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