Recently, I am working on a project that stimulate the TCR- transduced Jurkat with peptide, and looking for a activation marker (cytokine or surface marker). What is the activation marker for CD4+ T cells?
CD45 has been identified as an activation marker of the CD4+T cells, but there are differences between species in the expression in the expression of the CD45 isoforms.
Also the production of IL-2 or IFN-gamma could be useful.
Here is a reference you can check: "Shipkova M, Wieland E. Surface markers of lymphocyte activation and markers of cell proliferation. Clin Chim Acta. 2012 Sep 8;413(17-18):1338-49. doi: 10.1016/j.cca.2011.11.006. Epub 2011 Nov 19. PMID: 22120733."