Activation assays of PBMCs (Peripheral Blood Mononuclear Cells) are important immunological tools for simulating selected aspects of in vivo immune responses, evaluating drug effects on immune cells and supporting the development of immunotherapeutics.
PBMCs contain lymphocytes, including T cells, B cells and NK cells, as well as monocytes and dendritic cells. These populations contribute to immune activation, regulation and effector responses.
PBMCs are isolated from peripheral blood using methods such as density-gradient centrifugation.
Isolated PBMCs are cultured in vitro and activated using stimuli such as anti-CD3/CD28 antibodies, plant lectins such as PHA, Staphylococcus aureus enterotoxin B (SEB), interleukin-27 (IL-27), or phorbol myristate acetate (PMA) combined with ionomycin to induce T-cell activation.
PBMC activation is assessed by examining cell-surface markers such as CD69 expression, measuring cell proliferation and analyzing cytokine secretion such as IFN-γ.
Flow cytometry, ELISA and CellTiter-Glo luminescence assays can be used to analyze assay readouts and characterize the effects of test compounds on PBMC activation.
PBMC activation assays support the study of immune-system function, evaluation of immunotherapeutic efficacy and identification of potential drug targets. Researchers can assess drug-induced changes in PBMC proliferation, apoptosis and cytotoxicity, providing an early view of compound activity and potential safety liabilities.
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