作者: Ee W. Su , Caitlin J. Moore , Samantha Suriano , Christopher Bryce Johnson , Neizel Songalia
DOI: 10.1126/SCITRANSLMED.AAC8155
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摘要: Interleukin-2 (IL-2) is a lymphocyte growth factor that an important component of many immune-based cancer therapies. The efficacy IL-2 thought to be limited by the expansion T regulatory cells, which express high-affinity receptor subunit IL-2Rα. IL-15 under investigation as alternative IL-2. Although both cytokines signal through IL-2Rβγ, does not bind IL-2Rα and therefore induces less cell expansion. However, we found transferred effector CD8(+) cells induced curative responses in lymphoreplete mice only with IL-2-based therapy. conventional vitro assays showed similar responsiveness IL-15, upon removal free cytokine, mediated sustained signaling dependent on Mechanistically, promoting surface reservoir recycling back surface. Our results demonstrate endows ability compete temporally for via mechanisms beyond ligand affinity. These suggest strategies enhance expression tumor-reactive lymphocytes may facilitate development more effective