Creation and validation of a ligation-independent cloning (LIC) retroviral vector for stable gene transduction in mammalian cells

BMC Biotechnology

Methodology Article

Asmita Patel¹  Katherine Halvorsen¹  Anisleidys Muñoz²  Priyamvada Rai³ 

[1] Department of Medicine, University of Miami Miller School of Medicine, 1600 N.W. 10th Avenue, 33136, Miami, FL, USA;Department of Medicine, University of Miami Miller School of Medicine, 1600 N.W. 10th Avenue, 33136, Miami, FL, USA;Biology Department, Cox Science Center, University of Miami, 1301 Memorial Drive, 33124, Coral Gables, FL, USA;Department of Medicine, University of Miami Miller School of Medicine, 1600 N.W. 10th Avenue, 33136, Miami, FL, USA;Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, 1475 N.W. 12th Avenue, 33136, Miami, FL, USA;

关键词: LNCaP Cell;    Restriction Enzyme Site;    Exonuclease Activity;    Human Prostate Cancer Cell Line;    LNCaP Human Prostate Cancer Cell;   

DOI  :  10.1186/1472-6750-12-3

 received in 2011-10-21, accepted in 2012-01-16,  发布年份 2012

来源: Springer

【 摘 要 】

BackgroundCloning vectors capable of retroviral transduction have enabled stable gene overexpression in numerous mitotic cell lines. However, the relatively small number of feasible restriction enzyme sequences in their cloning sites can hinder successful generation of overexpression constructs if these sequences are also present in the target cDNA insert.ResultsUtilizing ligation-independent cloning (LIC) technology, we have modified the highly efficient retroviral transduction vector, pBABE, to eliminate reliance on restriction enzymes for cloning. Instead, the modified plasmid, pBLIC, utilizes random 12/13-base overhangs generated by T4 DNA polymerase 3' exonuclease activity. PCR-based introduction of the complementary sequence into any cDNA of interest enables universal cloning into pBLIC. Here we describe creation of the pBLIC plasmid, and demonstrate successful cloning and protein overexpression from three different cDNAs, Bax, catalase, and p53 through transduction into the human prostate cancer cell line, LNCaP or the human lung cancer line, H358.ConclusionsOur results show that pBLIC vector retains the high transduction efficiency of the original pBABE while eliminating the requirement for checking individual cDNA inserts for internal restriction sites. Thus it comprises an effective retroviral cloning system for laboratory-scale stable gene overexpression or for high-throughput applications such as creation of retroviral cDNA libraries. To our knowledge, pBLIC is the first LIC vector for retroviral transduction-mediated stable gene expression in mammalian cells.

【 授权许可】

Unknown   
© Patel et al; licensee BioMed Central Ltd. 2012. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.