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Adenoviral Transduction (CAT#: STEM-GT-0006-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.
Adenoviral vectors have proven to be a very successful transduction tool in many eukaryotic cell types, such as human and rodent cells. Besides dividing cell lines, this method gives access to difficult-to-transfect cells, such as primary cells. Adenovirus-mediated transduction is always transient, meaning that no nucleotide integration into the host genome occurs. Transduction efficiencies of up to 100% can easily be achieved. Importantly, biosafety level S2 is needed for adenoviral transduction.




Principle

Adenoviruses are a class of double stranded DNA viruses that efficiently deliver nucleotides directly into target cells. After initial binding to the Coxsackievirus and adenovirus receptor (CAR), which is expressed on the cell membrane, the virus enters the host cell via endocytosis. Following endosomal escape, the viral genome is transported into the nucleus, where it is expressed by the replication machineries of the host cell. In contrast to other viruses, the adenoviral DNA remains episomal, i.e., it is not integrated into the host genome. Nowadays, replication-deficient adenoviruses are widely used for transduction and gene therapy, due to their high efficiency and low pathogenicity.

Applications

Transient transduction
Gene therapy

Procedure

1. Make sure the cells on the 6 well plate are about 50% confluent.
2. Thaw your virus on ice .
3. Add a specific MOI of virus to each well according to your chosen dose curve. (MOI means Multiplicity Of Infection, so in a well that contains 50 MOI, there are 50 viral genomes for every cell)
4. Add the appropriate amount of virus to each dose well, and label the wells with the correct MOI.
5. Place virus-infected cells in 37C incubator until the next day (24 hours).
6. Replace media after 24 hours.

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