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缺乏Bcl-xL的MDCK细胞的瘤发源性下降,确保了流感疫苗生产的安全性.

Jiahao Zheng1,2, Boran Li3, Lanxin Jia1,2

  • 1National Engineering Technology Research Center for Combined Vaccines, Wuhan, China.

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研究人员修改了Madin-Darby犬 (MDCK) 细胞,以创建BY-02细胞菌株,显著降低瘤性,以更安全地生产流感疫苗. 这种工程细胞系显示出减少的增殖和增加的亡,提高了疫苗的安全性.

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科学领域:

  • 生物技术是生物技术.
  • 细胞生物学 细胞生物学
  • 疫苗学 疫苗学 疫苗学

背景情况:

  • 马丁-达比犬 (MDCK) 细胞是流感疫苗制造的标准.
  • MDCK细胞固有的致瘤潜力对生物产品的开发构成了安全问题.

研究的目的:

  • 通过减少瘤性来设计一个更安全的MDCK细胞系用于流感疫苗生产.
  • 评估B细胞淋巴瘤超大 (Bcl-xL) 基因淘汰对MDCK细胞特征和瘤形成的影响.

主要方法:

  • 使用CRISPR-Cas9基因编辑,在MDCK细胞中敲除了Bcl-xL基因,产生了BY-02细胞菌株.
  • 对原始MDCK和BY-02细胞之间的增殖,迁移,亡和线粒体通路的比较分析.
  • 瘤形成的测定是在裸体小鼠中使用两种细胞类型进行的.

主要成果:

  • 与原始的MDCK细胞相比,BY-02细胞菌株的增殖和迁移显著减少.
  • 在BY-02细胞中,亡水平显著增加,并调节了内源性线粒体亡途径.
  • 瘤形成试验表明,小鼠注射了BY-02细胞而不是MDCK细胞,瘤发病率大幅下降.

结论:

  • 击败Bcl-xL基因有效地抑制了MDCK细胞中的瘤形成.
  • 基因工程BY-02细胞菌株是提高流感疫苗生产安全性的有希望的候选人.