Autophagy Inhibition by Targeting PIKfyve Potentiates Response to Immune Checkpoint Blockade in Prostate Cancer

Multi-tyrosine kinase inhibitors (MTKIs) have thus far had limited success in the treatment of castration-resistant prostate cancer (CRPC). Here, we report a phase I-cleared orally bioavailable MTKI, ESK981, with a novel autophagy inhibitory property that decreased tumor growth in diverse preclinica...

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Veröffentlicht in:Nature cancer 2021-09, Vol.2 (9), p.978-993
Hauptverfasser: Qiao, Yuanyuan, Choi, Jae Eun, Tien, Jean C, Simko, Stephanie A, Rajendiran, Thekkelnaycke, Vo, Josh N, Delekta, Andrew D, Wang, Lisha, Xiao, Lanbo, Hodge, Nathan B, Desai, Parth, Mendoza, Sergio, Juckette, Kristin, Xu, Alice, Soni, Tanu, Su, Fengyun, Wang, Rui, Cao, Xuhong, Yu, Jiali, Kryczek, Ilona, Wang, Xiao-Ming, Wang, Xiaoju, Siddiqui, Javed, Wang, Zhen, Bernard, Amélie, Fernandez-Salas, Ester, Navone, Nora M, Ellison, Stephanie J, Ding, Ke, Eskelinen, Eeva-Liisa, Heath, Elisabeth I, Klionsky, Daniel J, Zou, Weiping, Chinnaiyan, Arul M
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container_end_page 993
container_issue 9
container_start_page 978
container_title Nature cancer
container_volume 2
creator Qiao, Yuanyuan
Choi, Jae Eun
Tien, Jean C
Simko, Stephanie A
Rajendiran, Thekkelnaycke
Vo, Josh N
Delekta, Andrew D
Wang, Lisha
Xiao, Lanbo
Hodge, Nathan B
Desai, Parth
Mendoza, Sergio
Juckette, Kristin
Xu, Alice
Soni, Tanu
Su, Fengyun
Wang, Rui
Cao, Xuhong
Yu, Jiali
Kryczek, Ilona
Wang, Xiao-Ming
Wang, Xiaoju
Siddiqui, Javed
Wang, Zhen
Bernard, Amélie
Fernandez-Salas, Ester
Navone, Nora M
Ellison, Stephanie J
Ding, Ke
Eskelinen, Eeva-Liisa
Heath, Elisabeth I
Klionsky, Daniel J
Zou, Weiping
Chinnaiyan, Arul M
description Multi-tyrosine kinase inhibitors (MTKIs) have thus far had limited success in the treatment of castration-resistant prostate cancer (CRPC). Here, we report a phase I-cleared orally bioavailable MTKI, ESK981, with a novel autophagy inhibitory property that decreased tumor growth in diverse preclinical models of CRPC. The anti-tumor activity of ESK981 was maximized in immunocompetent tumor environments where it upregulated expression through the interferon gamma pathway and promoted functional T cell infiltration, which resulted in enhanced therapeutic response to immune checkpoint blockade. Mechanistically, we identify the lipid kinase PIKfyve as the direct target of ESK981. PIKfyve-knockdown recapitulated ESK981's anti-tumor activity and enhanced the therapeutic benefit of immune checkpoint blockade. Our study reveals that targeting PIKfyve via ESK981 turns tumors from cold into hot through inhibition of autophagy, which may prime the tumor immune microenvironment in advanced prostate cancer patients and be an effective treatment strategy alone or in combination with immunotherapies.
doi_str_mv 10.1038/s43018-021-00237-1
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subjects Autophagy
Humans
Immune Checkpoint Inhibitors
Immunotherapy - methods
Life Sciences
Male
Phosphatidylinositol 3-Kinases - pharmacology
Prostatic Neoplasms, Castration-Resistant - drug therapy
Tumor Microenvironment
title Autophagy Inhibition by Targeting PIKfyve Potentiates Response to Immune Checkpoint Blockade in Prostate Cancer
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