How do you transduce suspension cells?
For suspension cells, spin down and resuspend cells in complete media at 1-5 × 105 cells/ml. Place in incubator and grow for an additional 24-48 hours. Avoid confluency or too high a density of cells during and after transduction. If necessary, replate.
How much polybrene do I add?
Make sure to use the polybrene-containing media to make the cell solution in this step. To seed the cells: Prepare a batch of cells as follows: Dilute 350,000 cells into a total volume of 7 mL of DMEM complete + 10 µg/mL polybrene. Mix well by pipetting or inverting the tube.
How do you infect suspension cells?
Infection of suspension cells
- Change medium of the suspension cells 1 day before the expt.
- On the day of infection, collect cells and count.
- Aliquot 1×105 cells per capped centrifuge tube.
- Remove supernatant, and add 250 ul virus of appropriate dilutions (see “virus preparation”).
- Incubate for 2 hr at 37c (incubator).
How much Polybrene do I add?
How long does lentiviral transduction last?
For LV transduction, the longer you leave the virus in contact with the cells, the better your transduction will be. Christopher gave a good guide above, normally I would see some expression at 24h and maximum expression at 48-72 hours.
What is the concentration of Polybrene?
This brings the total volume in each well up to 1.5 mL. Since all the media in these wells was made with DMEM complete + 10 µg/mL polybrene, the final concentration of polybrene in each well should be 10 µg/mL….Procedure.
| Dilution | Volume of Lentivirus (μL) | Volume of DMEM complete + 10 µg/mL polybrene (µL) |
|---|---|---|
| 1:500 | 3 | 497 |
Is lentiviral transfection stable?
Lentiviruses are used very widely to generate stable expression mammalian cell lines. They are used for both gene down-regulation (by using shRNA) or for gene up-regulation (by using ORF of gene of interest).
What is the protocol for Lentiviral infection and selection?
Protocol for Lentiviral Infection and Selection. Day 1: Plate target cells and incubate at 37°C, 5% CO 2 overnight. Day 2: Target cells should be approximately 70% confluent. Change to fresh culture media containing 8 μg/mL polybrene. Polybrene increases the efficiency of viral infection.
How do you use shRNA lentiviral particles to infect cells?
Infect cells by adding the shRNA Lentiviral Particles to the culture. Swirl the plate gently to mix and incubate overnight. The amount of viral particles to use varies greatly depending on the characteristics of the cell line used. NOTE: Keep thawed shRNA Lentiviral Particles on ice.
How to improve the efficiency of shRNA transduction in bacterial cultures?
Centrifuge the cultures to improve infection efficiency. To avoid target cells influenced by viral supernatant, limit the infection less than 8 hours. Remove and discard the virus-containing transduction medium and add fresh growth medium. Continue to incubate the cells for 24–48 hours to allow the shRNA to reach its maximum effect.
How do you make a lentiviral transfection with Optimem?
Lentiviral Transfection (10cm plate) and Concentration Protocol 4 μg Master mix-equal volumes of pVSV-G, pMDL and pRSV 4 μg lentivirus construct (i.e. your GFP-shRNA construct) In 1.5 mL tubes, mix 600 μL OptiMEM with 30μL Fugene.