IL-7 and IL-21 are superior to IL-2 and IL-15 in promoting human T cell–mediated rejection of systemic lymphoma in immunodeficient mice

Blood - Tập 115 Số 17 - Trang 3508-3519 - 2010
John C. Markley1,2,3, Michel Sadelain1,2,3
1Center for Cell Engineering and
2Immunology and Microbial Pathogenesis Program, Weill Graduate School of Medical Sciences of Cornell University, New York, NY
3Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, NY; and

Tóm tắt

AbstractThe γc-cytokines are critical regulators of immunity and possess both overlapping and distinctive functions. However, comparative studies of their pleiotropic effects on human T cell–mediated tumor rejection are lacking. In a xenogeneic adoptive transfer model, we have compared the therapeutic potency of CD19-specific human primary T cells that constitutively express interleukin-2 (IL-2), IL-7, IL-15, or IL-21. We demonstrate that each cytokine enhanced the eradication of systemic CD19+ B-cell malignancies in nonobese diabetic/severe combined immunodeficient (NOD/SCID)/γcnull mice with markedly different efficacies and through singularly distinct mechanisms. IL-7– and IL-21–transduced T cells were most efficacious in vivo, although their effector functions were not as enhanced as IL-2– and IL-15–transduced T cells. IL-7 best sustained in vitro T-cell accumulation in response to repeated antigenic stimulation, but did not promote long-term T-cell persistence in vivo. Both IL-15 and IL-21 overexpression supported long-term T-cell persistence in treated mice, however, the memory T cells found 100 days after adoptive transfer were phenotypically dissimilar, resembling central memory and effector memory T cells, respectively. These results support the use of γc-cytokines in cancer immunotherapy, and establish that there exists more than 1 human T-cell memory phenotype associated with long-term tumor immunity.

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