慢病毒载体介导稳定表达CD163 的PAM细胞系的建立及对PRRSV感染的研究

doi:10.11843/j.issn.0366-6964.2013.11.014

畜牧兽医学报 ›› 2013, Vol. 44 ›› Issue (11): 1797-1804.doi: 10.11843/j.issn.0366-6964.2013.11.014

慢病毒载体介导稳定表达CD163 的PAM细胞系的建立及对PRRSV感染的研究

王向鹏，魏蕊芳，肖书奇，周恩民^*

(西北农林科技大学动物医学院兽医免疫学研究所，杨凌 712100)

收稿日期:2013-05-07 出版日期:2013-11-23 发布日期:2013-11-23
通讯作者: 周恩民，教授，E-mail: zhouem@nwsuaf.edu.cn
作者简介:王向鹏（1985-），男，河南洛阳人，博士，主要从事PRRSV细胞受体的研究，E-mail: wangxiangpeng2003@126.com；魏蕊芳（1990-），女，河南郑州人，硕士，主要从事PRRSV细胞受体的研究，E-mail: weiruifang@nwsuaf.edu.cn。二人并列第一作者
基金资助:
国家自然科学基金（U0931003/L01、31101690）；国家高技术研究发展计划（863计划）（2011AA10A208-4）

Generation of a Porcine Alveolar Macrophage Cell Line Stably Expressing CD163 by Lentiviral Vector for the Production of Porcine Reproductive and RespiratorySyndrome Virus

WANG Xiang-peng, WEI Rui-fang, XIAO Shu-qi, ZHOU En-min^*

(Veterinary Immunology Institute, College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China)

Received:2013-05-07 Online:2013-11-23 Published:2013-11-23

摘要/Abstract

摘要：

本研究旨在通过慢病毒载体系统将猪源CD163转染入永生化的猪肺泡巨噬细胞（PAM）系(CRL-2843)，建立稳定表达CD163的PAM细胞系（PAM-CD163）及验证该细胞系对PRRSV的易感性。用PCR方法从pJET1.2-CD163载体上扩增CD163基因编码区，通过酶切连接构建慢病毒表达载体pTrip-CMV-CD163-IRES-pur。将该质粒与慢病毒包装质粒psPAX2和pMD2.G共转染293-T细胞，包装表达CD163的慢病毒。将收获的慢病毒在Polybrene的介导下转导至永生化PAM细胞，采用嘌呤霉素筛选和细胞有限稀释法筛选出稳定表达CD163的PAM细胞系。应用得到的细胞系进行PRRSV感染试验。经过RT-PCR、间接免疫荧光试验、Western blot和流式细胞术试验证实，筛选出1株能稳定表达CD163的PAM细胞系，命名为PAM-CD163。该株细胞对PRRSV高度易感，PRRSV在PAM-CD163细胞上的毒价可以达到10^5.0 TCID₅₀·mL^-1以上。建立了稳定表达CD163的PAM细胞系，可以用于PRRSV的分离培养和细胞受体的研究。

Abstract:

The objectives of this study were to use the lentiviral vector pTrip-CMV-IRES-pur plasmid to deliver porcine CD163 into a porcine alveolar macrophage (PAM) cell line (CRL-2843), to generate a cell line stably expressing CD163 (designated PAM-CD163), and to evaluate its permissibility for PRRSV infection. The porcine CD163 coding sequences were amplified by PCR from pJET1.2-CD163 plasmid and inserted into downstream of CMV promoter in the lentiviral vector pTrip-CMV-IRES-pur plasmid. Monolayer of 293-T cells were cotransfected with three plasmids psPAX2, pMD2.G and pTrip-CMV-CD163-IRES-pur. The recombinant lentivirus expressing CD163 was harvested in the culture fluid. For transduction, the immortalized PAM cells (CRL-2843) were exposed to lentivirus in the presence of polybrene. The transduced cells were selected with puromycin and single cell colonies were isolated and expanded for PRRSV infection assay. The CD163 gene was transcribed by RT-PCR and the protein was expressed as identified by indirect immunofluorescence assay, Western blot and flow cytometry analyses. A PAM cell line (CRL-2843) stably expressing CD163 (designated PAM-CD163) was susceptible to PRRSV infection with the titer of 10^5.0 TCID₅₀·mL^-1. A PAM cell line stably expressing CD163 was constructed and permissive to PRRSV infection. This cell line could be a valuable tool for PRRSV propagation and PRRSV cellular receptors study.

中图分类号:

王向鹏，魏蕊芳，肖书奇，周恩民. 慢病毒载体介导稳定表达CD163 的PAM细胞系的建立及对PRRSV感染的研究[J]. 畜牧兽医学报, 2013, 44(11): 1797-1804.

WANG Xiang-peng, WEI Rui-fang, XIAO Shu-qi, ZHOU En-min. Generation of a Porcine Alveolar Macrophage Cell Line Stably Expressing CD163 by Lentiviral Vector for the Production of Porcine Reproductive and RespiratorySyndrome Virus[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2013, 44(11): 1797-1804.

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慢病毒载体介导稳定表达CD163 的PAM细胞系的建立及对PRRSV感染的研究

Generation of a Porcine Alveolar Macrophage Cell Line Stably Expressing CD163 by Lentiviral Vector for the Production of Porcine Reproductive and RespiratorySyndrome Virus

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