Abstract
Lentiviral vectors derived from the human immunodeficiency type 1 virus (HIV-1 LV) are among the finest tools available today for the genetic modification of human monocyte-derived dendritic cells (MDDCs). However, this process is largely inefficient because MDDCs show a strong resistance to HIV-1 transduction. Here we describe a step-by-step protocol from the production of LVs to cell transduction that allows the efficient genetic modification of MDDCs. This protocol can be completed in 23 d from the initial phase of LV production to the final analysis of the results of MDDC transduction. The method relies on the simultaneous addition of HIV-1 LVs along with noninfectious virion-like particles carrying Vpx, a nonstructural protein encoded by the simian immunodeficiency virus (Vpx-VLPs). When thus provided in target cells, Vpx exerts a strong positive effect on incoming LVs by counteracting the restriction present in MDDCs; accordingly, 100% of cells can be transduced with low viral inputs. Vpx-VLPs will improve the efficiency of LV-mediated transduction of MDDCs with vectors for both ectopic gene expression and depletion studies.
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Acknowledgements
Work in our laboratory is supported by grants from the Agence Nationale de Recherche sur le SIDA (ANRS), SIDACTION, the Fondation pour la Recherche Médicale, Institut National de la Santé et de la Recherche Médicale and Ecole Normale Supérieure de Lyon (ENS-Lyon). S.D. is a post-doctoral fellow of the ANRS. A.C. is supported by the Centre National de la Recherche Sciéntifique (CNRS). The authors are indebted to D. Rigal and J. Bernaud at the Etablissement Français du Sang in Lyon for providing human blood-derived material.
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C.G., G.B., S.D., X.-N.N. and S.C. developed and continually improved the protocol over the years. A.C. and J.-L.D. supervised the project. A.C., S.D. and G.B. prepared the manuscript.
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Berger, G., Durand, S., Goujon, C. et al. A simple, versatile and efficient method to genetically modify human monocyte-derived dendritic cells with HIV-1–derived lentiviral vectors. Nat Protoc 6, 806–816 (2011). https://doi.org/10.1038/nprot.2011.327
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DOI: https://doi.org/10.1038/nprot.2011.327
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