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- W4362546087 abstract "<div>Abstract<p>Clinical responses to immunotherapy have been associated with augmentation of preexisting immune responses, manifested by heightened inflammation in the tumor microenvironment. However, many tumors have a noninflamed microenvironment, and response rates to immunotherapy in melanoma have been <50%. We approached this problem by utilizing immunotherapy (CTLA-4 blockade) combined with chemotherapy to induce local inflammation. In murine models of melanoma and prostate cancer, the combination of chemotherapy and CTLA-4 blockade induced a shift in the cellular composition of the tumor microenvironment, with infiltrating CD8<sup>+</sup> and CD4<sup>+</sup> T cells increasing the CD8/Foxp3 T-cell ratio. These changes were associated with improved survival of the mice. To translate these findings into a clinical setting, 26 patients with advanced melanoma were treated locally by isolated limb infusion with the nitrogen mustard alkylating agent melphalan followed by systemic administration of CTLA-4 blocking antibody (ipilimumab) in a phase II trial. This combination of local chemotherapy with systemic checkpoint blockade inhibitor resulted in a response rate of 85% at 3 months (62% complete and 23% partial response rate) and a 58% progression-free survival at 1 year. The clinical response was associated with increased T-cell infiltration, similar to that seen in the murine models. Together, our findings suggest that local chemotherapy combined with checkpoint blockade–based immunotherapy results in a durable response to cancer therapy. <i>Cancer Immunol Res; 6(2); 189–200. ©2018 AACR</i>.</p></div>" @default.
- W4362546087 created "2023-04-06" @default.
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- W4362546087 date "2023-04-03" @default.
- W4362546087 modified "2023-10-16" @default.
- W4362546087 title "Data from Robust Antitumor Responses Result from Local Chemotherapy and CTLA-4 Blockade" @default.
- W4362546087 doi "https://doi.org/10.1158/2326-6066.c.6549010.v1" @default.
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