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Using viral vectors as gene transfer tools (Cell Biology and Toxicology Special Issue: ETCS-UK 1 day meeting on genetic manipulation of cells) Howarth JL; Lee YB; Uney JBCell Biol Toxicol 2010[Feb]; 26 (1): 1-20In recent years, the development of powerful viral gene transfer techniques has greatly facilitated the study of gene function. This review summarises some of the viral delivery systems routinely used to mediate gene transfer into cell lines, primary cell cultures and in whole animal models. The systems described were originally discussed at a 1-day European Tissue Culture Society (ETCS-UK) workshop that was held at University College London on 1st April 2009. Recombinant-deficient viral vectors (viruses that are no longer able to replicate) are used to transduce dividing and post-mitotic cells, and they have been optimised to mediate regulatable, powerful, long-term and cell-specific expression. Hence, viral systems have become very widely used, especially in the field of neurobiology. This review introduces the main categories of viral vectors, focusing on their initial development and highlighting modifications and improvements made since their introduction. In particular, the use of specific promoters to restrict expression, translational enhancers and regulatory elements to boost expression from a single virion and the development of regulatable systems is described.|*Gene Expression[MESH]|*Gene Expression Regulation[MESH]|*Gene Transfer Techniques[MESH]|*Genetic Vectors[MESH]|*Viruses[MESH]|Animals[MESH]|Cell Line[MESH]|Cells, Cultured[MESH]|Enhancer Elements, Genetic[MESH]|Genes[MESH]|Humans[MESH]|Mitosis[MESH]|Models, Animal[MESH]|Promoter Regions, Genetic[MESH]|Regulatory Sequences, Ribonucleic Acid[MESH]|Virion/genetics[MESH] |