ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (8): 1323-1329.doi: 10.11843/j.issn.0366-6964.2013.08.022

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Construction of Recombinant Adenovirus Vector Specific to SREBP1 Gene of Qinchuan Cattle and the Packaging and Amplifying of the Corresponding Adenovirus

FU Chang-zhen1, ZAN Lin-sen1,2*, WANG Hong1, JIANG Bi-jie1, CHENG Gong1,2,WANG Hong-bao1,2, ZHU Guang-xing1, LI Yao-kun1, WANG Hong-cheng1   

  1. (1. College of Animal Science and Technology, Northwest A&F University, Yangling 712100,China 2. National Beef Cattle Improvement Center of Northwest A&F University, Yangling712100, China)
  • Received:2013-01-22 Online:2013-08-23 Published:2013-08-23

Abstract:

The objective of this research was to construct recombinant adenovirus vector specific to SREBP1 gene of Qinchuan cattle and further package and amplify recombinant adenovirus carrying SREBP1 gene, aimed at studying SREBP1 gene function at cellular level. A pair of exclusive primers was designed according to the GenBank sequence information of SREBP1 gene to amplify the complete CDS area of SREBP1 gene via polymerase chain reaction (PCR). The obtained PCR products were then sub-cloned into pMD19-T simple vector. The confirmed fragments containing CDS area of SREBP1 gene were first digested from clone vector and then?insert into the shuttle vector to construct the pAd-Track-CMV-SREBP1 plasmid. The resultant plasmid was linearized by digesting with restriction endonuclease Pme and subsequently transformed into BJ5183 containing pAdEasy-1 to obtain the expression vector pAd-SREBP1. Overall, the confirmed recombinant adenovirus plasmid pAd-SREBP1 was digested with Pac and transfected into 293A cell line to package and amplify the recombinant adenovirus. The viral titer was determined by GFP labeled method. SREBP1 gene was cloned from Qinchuan cattle with two mutations in the DNA fragments. The two mutations were proved to be caused probably by the varietal difference, not by external factors. Recombinant plasmid pAdTrack-CMV-SREBP1 and pAd-SREBP1 were successfully constructed to the package and amplify the recombinant adenovirus with 1.5×109 GFU·mL1 as its titer.

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