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Lentiviral Transduction (CAT#: STEM-GT-0007-WXH)

Introduction

The term "transduction" is used to describe a virus-mediated transfer of nucleic acids into cells. In contrast to transfection of cells with foreign DNA or RNA, no transfection reagent is needed here. The viral vector, itself, also called virion, is able to infect cells and transport the DNA directly into the nucleus, independent of further actions. After the release of the DNA into the nucleus, the protein of interest is produced using the cells' own machineries.<br />Recombinant lentiviral vectors are powerful tools for gene transfer with some advantages over other delivery vectors: Besides cells that undergo mitosis, they also have the ability to transduce non-dividing cells. Further, lentiviruses enable stable gene transfer in vitro and in vivo, as they integrate into the host cell genome and offer the possibility of positive cell selection. They have a broad host cell range that also includes cell types such as primary neurons, lymphocytes, and macrophages. Moreover, lentiviral vectors have also proven to be effective in transducing brain, liver, muscle, and retina in vivo without toxicity or immune responses. Biosafety level S2 is needed for lentiviral transduction.




Principle

Lentiviruses—a subclass of retroviruses—have the ability to permanently integrate into the genome of the host cell. After the virus has entered the cell, the viral RNA is transcribed by the reverse transcriptase to produce double-stranded DNA that enters the nucleus. Finally, the transgene is integrated into the host genome via the lentiviral integrase enzymes. When using lentiviral transduction, the user has to take into account effects caused by genomic integration.

Procedure

1. Plate target cells and incubate at 37°C, 5% CO2 overnight. Target cells should be approximately 70% confluent.
2. Add lentiviral particle solution.
3. Incubate cells at 37°C, 5% CO2 overnight.
4. Change to fresh media 24 hours after infection

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