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- W2750607700 abstract "Successful development of immunotherapeutic strategies for hepatocellular cancer (HCC) has been impeded by limited understanding of tumor-induced profound tolerance and lack of a clinically faithful HCC model. Recently, we developed a novel model that recapitulates typical features of human HCC. Using this clinically relevant model, we demonstrate that tumor growth impairs host immunity and causes a profound exhaustion of tumor antigen-specific (TAS) CD8+ T cells. Increase in frequency and suppressive function of regulatory T cells (Tregs) is critically involved in this tumor-induced immune dysfunction. We further demonstrate that sunitinib suppresses Tregs and prevents tumor-induced immune tolerance, allowing TAS immunization to activate endogenous CD8+ T cells. As a result, this combinational strategy delays tumor growth. Importantly, the additional integration of exogenous naive TAS CD8+ T cells by adoptive cell transfer (ACT) leads to the elimination of the established tumors without recurrence and promotes long-term survival of the treated mice. Mechanistically, sunitinib treatment primes the antitumor immune response by significantly decreasing Treg frequency, reducing TGF-β and IL-10 production by Tregs, and also protecting TAS CD8+ T cells from tumor-induced deletion in the setting of HCC. Taken together, sunitinib quantitatively and qualitatively modifies Tregs to overcome tumor-induced immune deficiency, suggesting the potential of sunitinib as a therapeutic immune activator for HCC control." @default.
- W2750607700 created "2017-09-15" @default.
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- W2750607700 date "2017-09-21" @default.
- W2750607700 modified "2023-10-18" @default.
- W2750607700 title "Sunitinib represses regulatory T cells to overcome immunotolerance in a murine model of hepatocellular cancer" @default.
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- W2750607700 doi "https://doi.org/10.1080/2162402x.2017.1372079" @default.
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