Encyclopedia of Experiments: Immunology
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Transcript
Begin with a recipient mouse pre-injected with genetically engineered, cell proliferative dye-stained CD8+ donor T lymphocytes. These lymphocytes express thymus-1.1 antigen marker, enabling their differentiation from the recipient T lymphocytes.
Subcutaneously inject endotoxin-free ovalbumin with a test adjuvant.
Adjuvants enhance the presentation of ovalbumin to antigen-presenting cells, or APCs, which process the ovalbumin and present the fragment with MHC.
Activated APCs migrate to the lymph nodes and spleen, interacting with pre-injected CD8+ T lymphocytes, differentiating and proliferating them into cytotoxic T lymphocytes.
Collect the mouse's lymph node and spleen, and generate a single-cell suspension.
Add a lysis buffer — exclusively lysing red blood cells.
Collect the lymphocytes and introduce a mix of fluorophore-labeled antibodies that interact with thymus-1.1, CD4, and CD8 marker-expressing cells.
Using flow cytometry, identify lymphocytes expressing thymus-1.1 and CD8, distinguishing them from recipient CD8+ T lymphocytes.
Quantify the green fluorescence of the proliferative dye from these cells. A reduction in fluorescence intensity confirms adjuvant-mediated cytotoxic T lymphocyte generation.
