生物技术通报 ›› 2014, Vol. 0 ›› Issue (3): 171-176.

• 研究报告 • 上一篇    下一篇

鸡α干扰素在家蚕中的表达及抗病毒活性测定

李田田1, 杨灵2, 易咏竹3, 沈桂芳1, 张志芳1, 李轶女1   

  1. (1.中国农业科学院生物技术研究所,北京 100081;2.河南省轻工业学校轻工工程系,郑州 450000;3.中国农业科学院蚕业研究所,镇江 212018)
  • 收稿日期:2014-01-10 出版日期:2014-03-29 发布日期:2014-03-31
  • 作者简介:李田田,女,硕士,研究方向:昆虫杆状病毒表达系统;E-mail:ttli2013@163.com
  • 基金资助:
    国家“863”计划资助项目(2011AA100603),国家自然科学基金资助项目(31070139)

Expression and Antiviral Activity of Chicken Interferon Alpha in Bombyx mori

Li Tiantian1, Yang Ling2, Yi Yongzhu3, Shen Guifang1, Zhang Zhifang1, Li Yinü1   

  1. (1. Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081;2. Department of Light Industry Engineering,Henan Province Light Industry School,Zhengzhou 450000;3. Sericultural Research Institute,Chinese Academy of Agricultural Sciences,Zhenjiang 212018)
  • Received:2014-01-10 Published:2014-03-29 Online:2014-03-31

摘要: 鸡α干扰素在防御病毒感染及治疗病毒性疾病中起着重要的作用。旨在利用家蚕杆状病毒表达系统研制有活性的鸡α干扰素。首先对鸡α干扰素基因(ChIFN-α)进行了优化与合成,将其克隆到杆状病毒转移载体pVL1393中,与ORF1629缺损的亲本病毒BmBcmid共转染,纯化重组病毒,再感染家蚕幼虫,收集蚕血淋巴以检测α干扰素基因的表达。Western blot分析结果显示,成功表达出分子量约为19 kD的鸡α干扰素。采用细胞病变抑制法在Vero-VSV*GFP 系统中测定表达产物的抗病毒活性。所的表达的鸡α干扰素具有明显的抗病毒活性,活性不低于3.2×10 5 U/mL。利用杆状病毒载体系统成功地表达了具有抗病毒活性的鸡α干扰素的成熟蛋白,为开发廉价高效的鸡干扰素生物制剂奠定了物质基础。

关键词: 鸡α干扰素, 家蚕, 杆状病毒表达系统, 抗病毒活性

Abstract: Chicken interferon alpha plays a significant role in infection prevention and treatment of chicken virus diseases. The purpose of this study is to acquire efficient expression and production of biologically active chicken interferon alpha by the baculovirus expression vector system. The full length of chicken interferon alpha(ChIFN-α)gene was optimized and synthesized. The optimized ChIFNα was cloned into the baculovirus transfer vector pVL1393. Thus, the recombinant plasmid pVL-ChIFNα was constructed. The pVL-ChIFNα was co-transfected with the BmBacmid DNA. The hemolymph of silkworm larvae was collected after infected with the recombinant virus. Western blot analysis showed that chicken interferon-alpha protein with the molecular weight of 19 kD was expressed. The activity of the expressed chicken interferon-alpha was detected by inhibiting cytopathic effect in the Vero-VSV*GFP test system. The antiviral activity was about 3. 2×10 5 U/mL. The chicken interferon alpha protein was successfully expressed in the baculovirus expression vector system, which would be valuable in developing efficient and cost effective chicken interferon biological product.

Key words: Chicken interferon alpha, Silkworm, Baculovirus expression vector system, Antiviral activity