FIGURE 4.
CD8 T lymphocytes exposed to adenosine have lower CD28 expression. Long-term cultures were established by stimulation with Ab-coated microbeads. DMSO, the ADA inhibitor (10 µM),oradenosine (10µM) plus ADA inhibitor (10 µM) were added on day0 and every 3 to 4 d thereafter. A, CD28 expression on CD3+CD8+ T cells in a long-term culture exposure to DMSO, ADA inhibitor (10 µM), or adenosine (10 µM) with ADA inhibitor (10µM).B,CD28messagewascomparedwithGAPDHbyQT-PCRatday70. n = 4. *p < 0.05.
