Shreffler:Cryopreservation

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(New page: ==Overview== Cryopreserving PBMC allows for phenotyping or functional studies to be preformed at a future time for convenience or efficiency, but cryopreservation adversely affects the su...)
Current revision (13:18, 11 August 2011) (view source)
(Materials)
 
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==Materials==
==Materials==
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* Sterile 50 mL conical tubes. Fisher #14-432-22
 
* Sterile 15 mL conical tubes. Fisher #14-959-53A
* Sterile 15 mL conical tubes. Fisher #14-959-53A
* Nalgene Cryo Freezing Container filled with 2-propanol. Fisher #15350-50 – 80° C Freezer  
* Nalgene Cryo Freezing Container filled with 2-propanol. Fisher #15350-50 – 80° C Freezer  
 +
* Nalgene cryo tubes or comparable in 1.8 or similar size
* Sterile, graduated transfer pipets. Fisher # 13-711-20 1.8 mL sterile cryogenic vials. Fisher # 12-565-171N  
* Sterile, graduated transfer pipets. Fisher # 13-711-20 1.8 mL sterile cryogenic vials. Fisher # 12-565-171N  
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* 5 mL snap top tube (BD Falcon 12 x 75 mm) for RAST sample. Fisher #14-959-11A (Falcon # 352063)
 
* Biological safety cabinet. Forma Scientific Model 1286 or comparable vendor  
* Biological safety cabinet. Forma Scientific Model 1286 or comparable vendor  
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* Sterile Dulbecco’s Phosphate buffered saline (PBS), Ca++ and Mg++ free. VWR#45000-436
 
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* RPMI – 1640 plus antibiotics (Expires 1 month after preparing)
 
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* AIM V Media (w/HAS). Invitrogen # 12055-091 (Expires 1 month after opening)
 
* Freezing Medium A. Tissue culture tested, heat inactivated, filtered, Human AB serum
* Freezing Medium A. Tissue culture tested, heat inactivated, filtered, Human AB serum
* Freezing Medium B. 20% DMSO in Freezing Medium A  
* Freezing Medium B. 20% DMSO in Freezing Medium A  
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* Sterile 100 μL tips. Fisher # 21-381-8a.
 
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* Non-sterile tips. Fisher # 21-197-8g
 
* Sterile Pasteur pipet (9”) Pipet, 10-100 μL. Fisher # 05-402-88  
* Sterile Pasteur pipet (9”) Pipet, 10-100 μL. Fisher # 05-402-88  
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* Turk’s solution. VWR Catalog: #RC885016 – 500mL, #RC885032 – 1L
 
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* Microcentrifuge tubes. Fisher # 02-681-290
 
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* Serological pipet, 25 mL. Fisher # 13-678-14b
 
* Blood collection and basic lab supplies. Gloves, tube racks, sharps containers, microscope, Kimwipes, ethanol squirt bottle, cell counter, calculator, pen, paper, beaker for decanting, pipet aid, balance, boxes to hold cryovials, timer
* Blood collection and basic lab supplies. Gloves, tube racks, sharps containers, microscope, Kimwipes, ethanol squirt bottle, cell counter, calculator, pen, paper, beaker for decanting, pipet aid, balance, boxes to hold cryovials, timer
==Procedure==
==Procedure==
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#: This is a sterile procedure. Perform all steps in a hood (biological safety cabinet), observing universal precautions for blood specimens and all biosafety regulations. All reagents should be used at room temperature.
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This is a sterile procedure. Perform all steps in a hood (biological safety cabinet), observing universal precautions for blood specimens and all biosafety regulations. All reagents should be used at room temperature.
# Take Freezing Media A and B out of the freezer. For each 10 x 106 cells, 0.5 mL of A and B will be needed. Allow time for the media to reach room temperature.
# Take Freezing Media A and B out of the freezer. For each 10 x 106 cells, 0.5 mL of A and B will be needed. Allow time for the media to reach room temperature.
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# Calculate the volume of PBS containing 1% Freezing Media A to add to the cells to yield a concentration of 20 x 10<sup>6</sup> cells/mL. Use a sterile pipette to add PBS containing 1% Freezing Media A to the cells to adjust the concentration to 20 x 10<sup>6</sup> cells/mL. Mix gently.
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# After isolating and counting PBMC as per your protocol, pellet cells to be preserved one additional time, remove supernatant and loosen pellet for resuspension in freezing media.
 +
# Calculate the volume of PBS containing 1% Freezing Media A to slowly add (drop by drop to the side of tube to minimize shearing forces) to the cells to yield a concentration of 20 x 10<sup>6</sup> cells/mL. Use a sterile pipette to add PBS containing 1% Freezing Media A to the cells to adjust the concentration to 20 x 10<sup>6</sup> cells/mL. Mix gently.
# Add an equal amount of Freezing Media B drop by drop while turning the tube. This should take 2 minutes. The final cell concentration will now be 10 x 10<sup>6</sup> cells/mL.
# Add an equal amount of Freezing Media B drop by drop while turning the tube. This should take 2 minutes. The final cell concentration will now be 10 x 10<sup>6</sup> cells/mL.
# Once mixing is complete, prepare the PBMC aliquots which will be frozen. Pipette gently to minimize sheer forces!
# Once mixing is complete, prepare the PBMC aliquots which will be frozen. Pipette gently to minimize sheer forces!
# Aliquot to cryovials (10-20 million per tube)
# Aliquot to cryovials (10-20 million per tube)
# Place the cryovials in a room temperature Nalgene freezing container with 2-propanol. Place the container in the freezer (– 80 °C) for at least 12 hours. After 12 hrs, the cryovials can be transferred to liquid nitrogen for long-term storage.
# Place the cryovials in a room temperature Nalgene freezing container with 2-propanol. Place the container in the freezer (– 80 °C) for at least 12 hours. After 12 hrs, the cryovials can be transferred to liquid nitrogen for long-term storage.
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==Discussion==
==Discussion==
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==References==
==References==
<biblio>
<biblio>
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#Hennersdorf pmid=15916720
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#Shreffler pmid=17156490
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#Knol pmid=1716273
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#Shreffler pmid=16670519
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</biblio>
</biblio>
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==Contact==
==Contact==

Current revision

Contents

Overview

Cryopreserving PBMC allows for phenotyping or functional studies to be preformed at a future time for convenience or efficiency, but cryopreservation adversely affects the survival and function of leukocyte populations differentially and the user should make themselves aware of the literature on this.

This protocol has been adapted from the URECA study of the Inner City Asthma Consortium

Materials

  • Sterile 15 mL conical tubes. Fisher #14-959-53A
  • Nalgene Cryo Freezing Container filled with 2-propanol. Fisher #15350-50 – 80° C Freezer
  • Nalgene cryo tubes or comparable in 1.8 or similar size
  • Sterile, graduated transfer pipets. Fisher # 13-711-20 1.8 mL sterile cryogenic vials. Fisher # 12-565-171N
  • Biological safety cabinet. Forma Scientific Model 1286 or comparable vendor
  • Freezing Medium A. Tissue culture tested, heat inactivated, filtered, Human AB serum
  • Freezing Medium B. 20% DMSO in Freezing Medium A
  • Sterile Pasteur pipet (9”) Pipet, 10-100 μL. Fisher # 05-402-88
  • Blood collection and basic lab supplies. Gloves, tube racks, sharps containers, microscope, Kimwipes, ethanol squirt bottle, cell counter, calculator, pen, paper, beaker for decanting, pipet aid, balance, boxes to hold cryovials, timer

Procedure

This is a sterile procedure. Perform all steps in a hood (biological safety cabinet), observing universal precautions for blood specimens and all biosafety regulations. All reagents should be used at room temperature.

  1. Take Freezing Media A and B out of the freezer. For each 10 x 106 cells, 0.5 mL of A and B will be needed. Allow time for the media to reach room temperature.
  2. After isolating and counting PBMC as per your protocol, pellet cells to be preserved one additional time, remove supernatant and loosen pellet for resuspension in freezing media.
  3. Calculate the volume of PBS containing 1% Freezing Media A to slowly add (drop by drop to the side of tube to minimize shearing forces) to the cells to yield a concentration of 20 x 106 cells/mL. Use a sterile pipette to add PBS containing 1% Freezing Media A to the cells to adjust the concentration to 20 x 106 cells/mL. Mix gently.
  4. Add an equal amount of Freezing Media B drop by drop while turning the tube. This should take 2 minutes. The final cell concentration will now be 10 x 106 cells/mL.
  5. Once mixing is complete, prepare the PBMC aliquots which will be frozen. Pipette gently to minimize sheer forces!
  6. Aliquot to cryovials (10-20 million per tube)
  7. Place the cryovials in a room temperature Nalgene freezing container with 2-propanol. Place the container in the freezer (– 80 °C) for at least 12 hours. After 12 hrs, the cryovials can be transferred to liquid nitrogen for long-term storage.

Discussion

discuss this protocol

References

  1. Shreffler WG, Visness CM, Burger M, Cruikshank WW, Lederman HM, de la Morena M, Grindle K, Calatroni A, Sampson HA, and Gern JE. . pmid:17156490. PubMed HubMed [Shreffler]

Contact

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