Lentiviruses are a subset of retroviruses, with the ability to intergrate into host chromosomes, and to infect both dividing and non-dividing cells. They are excellent tools to deliver gene expression or knockdown. Lentiviral vectors are widely used in basic biology and translational studies for stable expression of gRNA, shRNA and Cas9 inserts.
Why use lentiviral particles?
While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles. Lentiviral particles are generated by co-transfection of the lentiviral expression vector with lentiviral packaging plasmids into e.g. HEK293 cells and harvesting of the virus-containing supernatant afterwards.
Pseudoviral particles can be concentrated, frozen, and used in later experiments.
Advantages of Lentiviral Particles
Pre-made lentivirus provides a ready-to-use delivery method for a specific target without the worry and often troublesome lentivirus production process. See all advantages below:
Ready-to-use: Save up to 4 weeks of work
Reliable gene delivery into dividing and non-dividing cells
Pre-titered: High titer concentration for efficient transduction
Convenient: No need for optimization
Safety: 3rd generation system with improved biosafety