Preparing Cells for Freezing/Thawing Reagents used for prepping Cells Freezing Do's/Don'ts Miscellaneous Dangers of not Freezing Correctly
100
What is10x10^6
Freezing Concentration
100
What is Thrombin
This Reagent forces Platelets to form large Aggregates that are heavier than Lymphocytes.
100
What is a larger tube (disposable glass culture tube)
Frozen samples in small cryovials are transferred to what? This is so they can be diluted sufficiently to minimize toxicity.
100
What is 1.077 g/mol
Lymphocytes and Monocytes have a density of
100
What is 4 Hours
When doing a Manual Freezing, it is important to leave the cells in the -20 C Freezer for a minimum of
200
What is Spleen, Node, PBL
Tissues we can use to isolate Lymphocytes
200
What is Tris+NH4CL
Lyses RBC
200
What is Platelets
This needs to be removed because it is covered with HLA class I receptors and will bind to HLA Antibody which will decrease Antibody available for Lymphocytes
200
What is -170°C-180°C
The Liquid Nitrogen tank should be between these Temps
200
What is Cell Death
If the cell to DMSO Ratio is not correct this could lead to
300
What is Final Freezing Concentration
5x10^6
300
What is Histopaque
A Denstiy Gradient that has a specific gravity that is the sameas Lymphocytes
300
What is 45% Percoll
This Reagent is recommended to use when cleaning up frozen Lymphocyte preps before running FCXM because this removes any Non-Viable Cells
300
What is Post Tx Monitoring
This is One of the main reasons we freeze Donor Cells
300
What is False Neg/Pos
If the cell prep is not cleaned properly, it can give results that are
400
What is Complete Media (RPMI FCS+PS)
This helps the Cells stay "Happy"
400
What is DMSO
This is a Cryopreservative that is essential to prevent cell damage due to ice crystal formation
400
What is 80%
Cell Viability should always be greater than
400
What is Once a week on FRIDAY!!!
This is when we check the Nitrogen Tank Levels!!! Lol
400
What is kept cool (4 degrees C)
DMSO is toxic to lymphocytes at room temperature, so cell should be
500
What is a Cryovial 2ml
Our Cells are frozen in what type of tubes
500
What is Iron
By ingestion this Reagent, it aids in the removal of Monocytes by passing them over a magnet
500
What is the TOP Line or RIGHT Line
When counting your Lymphocytes for freezing on the Hemocytometer, We do not include cells that are on the
500
What is 10 vials
We freeze how many Tubes per Organ
500
What is Uninterpretable Results
A scatter plot with Dual Populations or with very FEW T or B Cells gives DR. K






How do we prep Cells for Freezing/Thawing in the HLA Lab

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