期刊
CANCER IMMUNOLOGY IMMUNOTHERAPY
卷 60, 期 10, 页码 1447-1460出版社
SPRINGER
DOI: 10.1007/s00262-011-1049-8
关键词
V gamma 9 V delta 2 lymphocyte; Interleukin-2; Zoledronic acid; Renal cell carcinoma
资金
- Novartis Pharmaceuticals
- University of Wisconsin Carbone Cancer Center [P30 CA014520]
- NIH [T32 CA009614]
Prior to the advent of VEGF-targeted therapies, renal cell carcinoma (RCC) was among the few solid tumors shown to respond to cytokine-based therapies such as interleukin-2 (IL-2) and interferon alpha. Previous work has shown that aminobisphosphonates, including zoledronic acid (ZA), are capable of activating human V gamma 9 V delta 2 T cells in vitro, and these cells can be further expanded with IL-2. Moreover, these V gamma 9 V delta 2 T cells have cytolytic activity in vitro to multiple human tumor cell lines. In the current report, we have conducted a pilot trial in patients with metastatic RCC, evaluating different doses of ZA in combination with low-dose IL-2 to determine whether combining these agents can promote in vivo proliferation of V gamma 9 V delta 2 T cells and elicit an antitumor response. In 12 patients evaluated, no objective clinical responses were observed by RECIST criteria; however, two patients experienced prolonged stable disease. A modest increase in V gamma 9 V delta 2 T-cell frequency could be detected by Day 8 of therapy in four of the nine patients who received at least one cycle of therapy, but not to the magnitude anticipated from preclinical models. Repeated administration of IL-2 and ZA resulted in both a diminished in vivo percentage of V gamma 9 V delta 2 T cells as well as impaired expansion in vitro after the first cycle of therapy. These results suggest that repeated administration of IL-2 and ZA, at the doses and schedules used in this trial, may actually inhibit the proliferative capacity of V gamma 9 V delta 2 T cell in patients with metastatic RCC.
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