Sack: Cell Harvesting for Electrophysiology: Difference between revisions

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(New page: Cell Plating for Electrophysiology<br> Jon Sack Feb 3, 2011<br> Ken Eum April 12, 2011 (Edit)<br> Notes: Steps should be done (not necessary if cell stock is only being used for plating c...)
 
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Cell Plating for Electrophysiology<br>
Cell Harvesting for Electrophysiology<br>
Jon Sack Feb 3, 2011<br>
Ken Eum July 18, 2012 (edit)<br>
Ken Eum April 12, 2011 (Edit)<br>


Notes: Steps should be done (not necessary if cell stock is only being used for plating cells for electrophysiology) inside of a Biological Safety Cabinet in Sterile conditions.  
Notes: Steps should be done (not necessary if cell stock is only being used for harvesting cells for electrophysiology) inside of a Biological Safety Cabinet in Sterile conditions.  


Procedures (in 35mm dish):<br>
Procedures (in 35mm dish):
# Check under microscope to make sure that cells are less than 80% confluent
# Check under microscope to make sure that cells are ~80% confluent
# Carefully remove (aspirate) the solution from the T-25 flask containing the cells
# Carefully remove (aspirate) the solution from the 35mm dish containing the cells
# Rinse with DPBS (Divalent free Dulbecco’s Phosphate Buffered Saline) ~ 5 mL
#       Rinse with Versene ~ 2 mL
# Remove (aspirate) the DPBS solution
# Remove (aspirate) the Versene solution
# Add 1 mL 0.05% Trypsin EDTA
# Add 2 mL of Versene to detach cells
# Place in 37° C incubator until cells detach from the dish ~ 5 min
# Wait ~1-2 minutes and scrape off cells with a cell scraper
#*Check under the microscope to make sure cells have detached.  If the cells are not yet detached, lightly tap the dish against the table.
# Transfer the suspended cells into a 15mL conical tube
# Pipet up and down 5-10 times in the Biological Safety Cabinet
# Add 3mL of CHO-SFM – II + 25mM HEPES + 1% Pen/Strep into the 15mL conical tube with the suspended cells.
#*Check under the microscope to make sure the cells are dispersed into single cells.
# Spin at 500rcf for 2 minutes
# Add 2 mL of Cell Media with selection agents into new 35mm dishes
# Aspirate out the supernatant
# Add 1 drop of the trypsinized cells into each 35mm dish with the Cell Media
# Resuspend with 2mL of CHO-SFM-II + 25mM HEPES
# Swirl the dish or pipet up and down
# Transfer the suspended cells into a 2mL tube
# If using Kv2.1 T-Rex CHO cells, add tetracycline (1µg/mL) for 1 hour.  After 1 hour, replace with fresh media or the external solution for electrophysiology recordings.
# Label the Dish: Name, Date, Cell Line, Passage #, Ratio
*Cell Media: Ham’s – F12 from Gibco, 10% FBS, 1% Penicillin/Streptomycin
To make add 50 mL Media + 50 mL FBS
**Cell Media with Selection Agents (Zeocin and Blasticidin)
F12 from Gibco, 10% FBS, 1% Penicillin/Streptomycin, 1/10,000 Blasticidin, 1/4,000 Zeocin

Revision as of 18:40, 8 October 2012

Cell Harvesting for Electrophysiology
Ken Eum July 18, 2012 (edit)

Notes: Steps should be done (not necessary if cell stock is only being used for harvesting cells for electrophysiology) inside of a Biological Safety Cabinet in Sterile conditions.

Procedures (in 35mm dish):

  1. Check under microscope to make sure that cells are ~80% confluent
  2. Carefully remove (aspirate) the solution from the 35mm dish containing the cells
  3. Rinse with Versene ~ 2 mL
  4. Remove (aspirate) the Versene solution
  5. Add 2 mL of Versene to detach cells
  6. Wait ~1-2 minutes and scrape off cells with a cell scraper
  7. Transfer the suspended cells into a 15mL conical tube
  8. Add 3mL of CHO-SFM – II + 25mM HEPES + 1% Pen/Strep into the 15mL conical tube with the suspended cells.
  9. Spin at 500rcf for 2 minutes
  10. Aspirate out the supernatant
  11. Resuspend with 2mL of CHO-SFM-II + 25mM HEPES
  12. Transfer the suspended cells into a 2mL tube
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