Cell Reports (Nov 2023)

Targeting VCP potentiates immune checkpoint therapy for colorectal cancer

  • Fang Wang,
  • Qi Qi,
  • Baifu Qin,
  • Yiwei Wang,
  • Youwei Huang,
  • Qing Li,
  • Xi Shen,
  • Xiangyu Wang,
  • Shangqi Yang,
  • Guopeng Pan,
  • Jiahong Chen,
  • Zixi Qin,
  • Xueqin Chen,
  • Yuqing Yang,
  • Yuequan Zeng,
  • Jun Liu,
  • Yuqin Li,
  • Ying Li,
  • Zexiong Cheng,
  • Xi Lin,
  • Fan Xing,
  • Yubo Zhang,
  • Guocai Wang,
  • Kai Li,
  • Zhenyou Jiang,
  • Haipeng Zhang

Journal volume & issue
Vol. 42, no. 11
p. 113318

Abstract

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Summary: Immune checkpoint blockade therapies are still ineffective for most patients with colorectal cancer (CRC). Immunogenic cell death (ICD) enables the release of key immunostimulatory signals to drive efficient anti-tumor immunity, which could be used to potentiate the effects of immune checkpoint inhibitors. Here, we showed that inhibition of valosin-containing protein (VCP) elicits ICD in CRC. Meanwhile, VCP inhibitor upregulates PD-L1 expression and compromises anti-tumor immunity in vivo. Mechanistically, VCP transcriptionally regulates PD-L1 expression in a JAK1-dependent manner. Combining VCP inhibitor with anti-PD1 remodels tumor immune microenvironment and reduces tumor growth in mouse models of CRC. Addition of oncolytic virus further augments the therapeutic activity of the combination regimen. Our study shows the molecular mechanism for regulating PD-L1 expression by VCP and suggests that inhibition of VCP has the potential to increase the efficacy of immunotherapy in CRC.

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