Frozen lymphocyte pools as technical and reference controls for lymphocyte transformation

Area of Science:

• Immunology
• Cellular immunology

Background:

• Peripheral blood lymphocytes from healthy individuals exhibit variable responses to mitogens and allogeneic cells.
• Understanding lymphocyte variability is crucial for interpreting immune function assays.

Purpose of the Study:

• To evaluate the utility of pooled peripheral blood lymphocytes as standardized reagents in immunological assays.
• To determine if pooled lymphocytes maintain responsiveness after cryopreservation.

Main Methods:

• Peripheral blood lymphocytes were collected from healthy donors.
• Lymphocytes were pooled, and their responses to mitogens and allogeneic cells were assessed.
• Responsiveness of pooled lymphocytes after cryopreservation was evaluated.

Main Results:

• Pooled lymphocytes demonstrated responses equivalent to the mean of individual lymphocyte responses.
• Cryopreserved pooled lymphocytes retained their responsiveness.
• Pooled lymphocytes were suitable as standard responding cells but not as controls for antigen-induced responses.

Conclusions:

• Pooled peripheral blood lymphocytes offer a standardized and reproducible cell population for lymphocyte transformation tests.
• Cryopreserved pooled lymphocytes are a viable option for use as standard responding cells.
• Pooled lymphocytes are not appropriate as controls in antigen-specific lymphocyte transformation assays due to potential dilution of specific responses.