ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (5): 754-759.doi: 10.11843/j.issn.0366-6964.2013.05.012

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Construction and Virus Rescue of Infectious Molecular Clones of Subgroup J Avian Myeloid Leukosis Virus

LIN Yan1, XIA Jing1, ZOU Nian-li1, GUO Ming-ping1, WANG Fu-yan1, ZHAO Yang1, WEN Xin-tian1, 2, CAO San-jie1, 2, HUANG Yong1, 2*   

  1. (1. College of Veterinary Medicine, Sichuan Agricultural University, Ya’an 625014, China;2. Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Ya’an 625014, China)
  • Received:2012-11-21 Online:2013-05-23 Published:2013-05-23

Abstract:

The objective of this study was to construct the infectious molecular clone with molecular marker of subgroup J avian myeloid leukosis virus (ALV-J) strain SCGS-1. A full-length infectious clone of ALV-J (pUC-SCGS) was constructed by cloning and combining of three fragments using PCR method from SCGS-1. SalⅠ site was introduced on 4684nt of SCGS-1 by overlapping PCR to form another infectious clone and named pUC-△SCGS. The two plasmids, pUC-SCGS and pUC-△SCGS, were transfected into CEF, and the rescued viruses were detected by PCR, avian leukosis virus antigen test kit and indirect immunofluorescence assay (IFA). Digestion and sequence analysis revealed that the infectious clone pUC-SCGS and pUC-△SCGS were constructed correctly. PCR, ELISA test and IFA results showed that the 3rd and 4th generation of rescued virus were positive, while the controlled CEF were negative. Rescued virus and the virus with molecular marker of subgroup J avian myeloid leukosis virus were successfully constructed, named rSCGS-1 and r△SCGS-1.

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