首都医科大学学报 ›› 2011, Vol. 32 ›› Issue (3): 318-323.

• 传染病及相关慢性疾病研究进展 • 上一篇    下一篇

HBV相关分泌蛋白c18orf54的克隆表达及初步功能研究

常路丝1,乔雍1,魏洪莲2,肖凡1,郝晓花1,张仁雯3,成军1,魏红山1*   

  1. 1. 首都医科大学附属北京地坛医院传染病研究所,北京 100015; 2. 首都医科大学附属北京同仁医院消化内科,北京 100730; 3. 北京大学医学部研究生院,北京 100191
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-06-21 发布日期:2011-06-21
  • 通讯作者: 魏红山

HBV-related gene c18orf54 cloning and preliminary function

CHANG Lu-si1, QIAO Yong1, WEI Hong-lian2, XIAO Fan1, HAO Xiao-hua1, ZHANG Ren-wen3, CHENG Jun1, WEI Hong-shan1*   

  1. 1. Beijing Ditan Hospital Institute of Infectious Diseases, Capital Medical University, Beijing 100015, China;2. Department of , Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China;3. Graduate School of Peking University, Peking University Health Science Center, Beijing 100191, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-06-21 Published:2011-06-21
  • Contact: WEI Hong-shan

摘要: 目的 体外原核表达C18ORF54的重组蛋白,对其进行纯化,制备兔抗C18ORF54蛋白多克隆抗体,并对该重组蛋白对HepG2细胞可能的生物学作用进行初步研究。
方法 应用反转录聚合酶链反应(reverse transcription PCR,RT-PCR)技术,以HepG2细胞总RNA为模板,反转录并扩增c18orf54目的基因片段,构建原核表达载体pET-32a(+)-c18orf54。转化大肠埃希菌BL21(DE3),异丙基β-D-硫代吡喃半乳糖(isopropyl β D thiogalacttpy ranoside,IPTG)诱导并通过十二烷基磺酸钠聚丙烯酰胺凝胶电泳(sodium lauryl sulfatepolyacrylamide gol electrophoresis,SDS-PAGE)分析、免疫印迹(Western blotting)、生物质谱技术分析证实c18orf54Z重组蛋白表达正确。用Ni+亲和柱纯化表达蛋白。C18ORF54重组蛋白免疫新西兰兔,获得抗c18orf54蛋白的多克隆抗体。以纯化的C18ORF54蛋白为抗原,分别以免疫前后的新西兰兔血清作为第一抗体,利用Western blotting和酶联免疫吸附(enzyine linked immunosorbent assay,ELISA)法对多克隆抗体进行特异性分析及效价检测。将不同浓度范围的C18ORF54重组蛋白与培养的HepG2细胞共孵育,初步了解该重组蛋白对HepG2细胞可能的生物学作用。
结果 PCR法扩增获得c18orf54基因片段,成功表达了C18ORF54重组蛋白,经SDSPAGE和Western blotting分析得到证实。成功获得重组蛋白及抗C18ORF54多克隆抗体。ELISA检测证实多克隆抗体效价>1∶320 000。
结论 利用大肠埃希菌BL21(DE3)能够成功表达C18ORF54蛋白,获得高特异性、高效价兔抗C18ORF54重组蛋白的多克隆抗体,为今后研究C18ORF54蛋白的生物学特性奠定了基础。

关键词: 乙型肝炎病毒, c18orf54, 细胞周期, 发病机制

Abstract: Objective To express and purify the recombinant protein, and to prepare the c18orf54 specific rabbit polyclonal antibody.
Methods c18orf54 cDNA was ligated into the prokaryotic expressive vector pET-32a(+), and the resulting plasmid was transformed into E.coil BL21(DE3). The protein expression was induced with IPTG and the protein was analyzed with sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) and Western blotting. The expressed product was purified using Ni+ affinity column chromatography. The recombinant protein was also confirmed with mass spectrometry. Then the purified C18ORF54 fusion protein was used to immunize New Zealand rabbits to gain polyclonal antibody. The specificity and potency of polyclonal antibody were evaluated by Western blotting and ELISA.
Results The C18ORF54 fusion protein was highly expressed. The protein was mainly in the inclusion body. ELISA indicated the titer of polyclonal antibody>1∶320 000. The high specificity was confirmed with Western blotting. Immunohistochemical staining of liver tissue showed that this glycosyltransferase was mainly scattered in cytoplasm of hepatocytes.
Conclusion The recombinant C18ORF54 fusion protein and the c18orf54 specific polyclonal antibody will be valuable tools for the investigation on the biological function of C18ORF54.

Key words: hepatitis B virus, c18orf54, cell cycle, pathogenesis

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