重组人内皮抑素在酵母中的表达及对人肺腺癌Astc-a-1细胞生长的抑制

目的在一种高效外源基因表达系统———毕赤酵母系统表达重组人内皮抑素,评价纯化的内皮抑素对人肺腺癌Astc-a-1细胞生长抑制的作用,为临床研究做进一步的探讨。方法和结果在酵母系统成功表达了重组人内皮抑素(re-combinant human endostatin),经肝素亲和层析得到了较高纯度的内皮抑素,经过筛选的人内皮抑素能够有效抑制ECV-304细胞的增殖,并与对照组有非常显著性差异(P<0.01);动物实验表明其能够有效抑制裸鼠肺腺癌Astc-a-1细胞的生长,统计学分析有非常显著性差异(P<0.01)。结论酵母系统内能够大量表达具有生物学活性的重组人内皮抑素,能在人体外有效抑制裸鼠肺腺癌Astc-a-1的生长,对其应用于临床具有重要意义。

Expression of recombinant human endostatin in Pichia pastoris and its inhibitory effects on the growth of human lungadenocarcinoma Astc-a-1 cells

Objective To achieve expression of recombinant human endostatin (rhES) in a highly efficient foreign gene ex-pression system, the yeast strain Pichia pastoris, and to evaluate the inhibitory effect of rhES on the growth of nude mouse pul-monary adenocarcinoma cells. Methods and Results The rhES gene was efficiently expressed in the yeast strain, and hep-arin affinity chromatography yielded highly purified endostatin identified by Western blotting, which proved to significantly inhibit the growth of the ECV-304 cells in vitro and also the growth of the lung adenocarcinoma Astc-a-1 in nude mice. Con-clusions The rhES gene can be expressed in Pichia pastoris, and has the ability to restrain the growth of ECV-304 cells and lung adenocarcinoma Astc-a-1 in nude mice, showing important potentials for future clinical applications.