2017
DOI: 10.1038/s41467-017-00449-z
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HSP90 inhibition enhances cancer immunotherapy by upregulating interferon response genes

Abstract: T-cell-based immunotherapies are promising treatments for cancer patients. Although durable responses can be achieved in some patients, many patients fail to respond to these therapies, underscoring the need for improvement with combination therapies. From a screen of 850 bioactive compounds, we identify HSP90 inhibitors as candidates for combination with immunotherapy. We show that inhibition of HSP90 with ganetespib enhances T-cell-mediated killing of patient-derived human melanoma cells by their autologous … Show more

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Cited by 106 publications
(82 citation statements)
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“…2A and B). The efficacy we observed is equal to or greater than that observed in other reports using intermittent, high doses of HSP90 inhibitor in this model (24,25). We also found that low-dose Hsp90i administration reduces tumor burden in the MC38 and B16-F10 melanoma model even with delayed administration of low-dose Hsp90i ( Supplementary Fig.…”
Section: Continuous Low-dose Hsp90 Inhibition Stimulates Antitumor Imsupporting
confidence: 70%
See 1 more Smart Citation
“…2A and B). The efficacy we observed is equal to or greater than that observed in other reports using intermittent, high doses of HSP90 inhibitor in this model (24,25). We also found that low-dose Hsp90i administration reduces tumor burden in the MC38 and B16-F10 melanoma model even with delayed administration of low-dose Hsp90i ( Supplementary Fig.…”
Section: Continuous Low-dose Hsp90 Inhibition Stimulates Antitumor Imsupporting
confidence: 70%
“…This finding could have important implications for resistance to immune checkpoint blockade, which can arise following mutational inactivation of IFNg signaling (2,34,35). A recent report describes the induction of a subset of IFN response genes with heat shock-inducing concentrations of HSP90 inhibitor in culture (24). While this report did not directly investigate effects on MHC-I antigen presentation, the results suggest that high level HSP90 inhibition engages IFNg signaling, whereas our data indicate that low dose stimulates antigen presentation through a distinct mechanism.…”
Section: Discussionmentioning
confidence: 94%
“…Nevertheless, although many promising Hsp90 inhibitors have been put on the shelf after extensive preclinical and clinical studies (e.g. 17-AAG, 17-DMAG, AUY922, KW-2478, STA-9090) in the past 20 years, recent studies demonstrated that Hsp90 inhibitors might still be useful for bolstering immunotherapy [11]. Therefore, further studies are needed and Hsp90-survivin inhibitor reposition may be possible, although the effect will likely not be specific to survivin.…”
Section: Inhibitors That Disrupt Survivin Interactions With Its Partnmentioning
confidence: 99%
“…Some genes that are known to be directly involved in the MHC I pathway, such as TAP1, TAP2, CALR, TAPBP , and B2M [33], were at the top 1% of our prediction list (Additional file 2: Table S1). Alterations of some top genes in our prediction, such as B2M, JAK1, JAK2, HSP90 , and IFNG , are known to be associated with poor response to anti-PD-1 therapy [7, 33-36]. Several genes that were recently found to be associated with anti-PD-1 response were also identified in the top list of our prediciton, such as KRAS [37], STK11 [38], DDR2 [39], and ATR [40].…”
Section: Resultsmentioning
confidence: 99%