检验医学 ›› 2016, Vol. 31 ›› Issue (9): 825-829.DOI: 10.3969/j.issn.1673-8640.2016.09.020

• 基础研究·论著 • 上一篇    下一篇

重组人癌胚抗原的原核表达及其在质控品中的应用

李江峰, 宋晓丽, 钱伟, 矫丽媛, 赵晓妮, 王继华, 才蕾   

  1. 国家地方联合自检型快速诊断工程实验室 广州万孚生物技术股份有限公司研发中心质控品实验室,广东 广州 510641
  • 收稿日期:2016-01-08 出版日期:2016-09-30 发布日期:2016-10-11
  • 作者简介:null

    作者简介:李江峰,男,1987年生,硕士,主要从事体外诊断工作。

Prokaryotic expression of recombinant human carcinoembryonic antigen and its application in quality control materials

LI Jiangfeng, SONG Xiaoli, QIAN Wei, JIAO Liyuan, ZHAO Xiaoni, WANG Jihua, CAI Lei   

  1. National and Local United Engineering Laboratory of High-Efficiency Self-Testing Reagents,Quality Control Laboratory of Research and Development Center of Guangzhou Wondfo Biotech Co.,Ltd.,Guangzhou 510641,Guangdong,China
  • Received:2016-01-08 Online:2016-09-30 Published:2016-10-11

摘要:

目的原核表达人癌胚抗原(CEA),并将重组蛋白作为原材料应用在质控品的开发中。方法利用基因工程方法构建原核表达载体pCold1-cea,通过大肠埃希菌 BL21 (DE3)进行原核表达得到重组人癌胚抗原(rhCEA)。结果得到了rhCEA的包涵体,经纯化及透析复性后得到可溶的、具有免疫活性形式的重组蛋白,并将其利用在质控品的研制中。研制出的质控品在Abbott平台上的检测结果为:高值235.35 ng/mL,中值68.04 ng/mL,低值11.97 ng/mL;在Roche平台上的检测结果为:高值32.27 ng/mL,中值7.99 ng/mL,低值1.35 ng/mL;在Wondfo平台上的检测结果为:高值5 ng/mL,中值和低值未能检出。结论原核表达的rhCEA在不同检测平台上的检测结果相差较大。rhCEA质控品更适用于Abbott平台,而不适合于其他2种平台。

关键词: 原核表达, 癌胚抗原, 包涵体, 质控品

Abstract:

Objective To use prokaryotic cell to express human carcinoembryonic antigen(CEA),and use it in the development of quality control materials. Methods Gene engineering methods were used to construct prokaryotic expression vector pCold1-cea,and the vector was transferred into Escherichia coli BL21(DE3) to express recombinant human carcinoembryonic antigen(rhCEA). Results The inclusion bodies of rhCEA were formed in Escherichia coli BL21(DE3) after purification and refolding,which was used into the preparation of quality control materials. The results of quality control materials on Abbott platform were 235.35 ng/mL for high level,68.04 ng/mL for middle level and 11.97 ng/mL for low level. The results on Roche platform were 32.27 ng/mL,7.99 ng/mL and 1.35 ng/mL for high,middle and low levels,respectively. The results on Wondfo platform were 5 ng/mL for high level,and the results for middle and low levels had not been determined. Conclusions Quality control materials prepared by rhCEA have been analyzed in different analysis systems with obvious determination results. The quality control materials are more suitable for Abbott platform than the other 2 platforms.

Key words: Prokaryotic expression, Carcinoembryonic antigen, Inclusion bodies, Quality control materials

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