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Targeting OAS3 for reversing M2d infiltration and restoring anti-tumor immunity in pancreatic cancer

  • 0Department of Gastrointestinal Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Cancer Immunology, Immunotherapy : Cii +

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December 31, 2024

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December 31, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Pancreatic cancer cells use lactate to promote M2d macrophage polarization, which hinders anti-tumor immunity. Targeting OAS3 reverses this, enhancing cancer treatments and restoring immune response.

Area Of Science

  • Immunology
  • Oncology
  • Molecular Biology

Background

  • Tumor-associated macrophages (TAMs) drive immune escape in pancreatic cancer (PC).
  • Lactate influences macrophage polarization, but mechanisms are unclear.
  • M2d macrophages secrete IL-10 and VEGF-A, suppressing CD8+ T cells and promoting angiogenesis.

Purpose Of The Study

  • Investigate lactate's role in PC-driven macrophage polarization.
  • Identify key regulators of M2d polarization in PC.
  • Evaluate OAS3 as a therapeutic target for PC.

Main Methods

  • Analysis of PC cells and patient samples.
  • Investigated lactate/METTL3/OAS3 signaling axis.
  • Utilized humanized mouse models with OAS3-deficient macrophages.

Main Results

  • PC cells induce M2d polarization via lactate, increasing IL-10 and VEGF-A.
  • OAS3 is upregulated by PCs through the lactate/METTL3/OAS3 axis.
  • OAS3 deficiency impairs M2d polarization and enhances gemcitabine/anti-PD-L1 efficacy.

Conclusions

  • OAS3 is crucial for M2d polarization and pro-tumor functions in PC.
  • Targeting OAS3 can reverse M2d infiltration and restore anti-tumor immunity.
  • OAS3 represents a potential therapeutic target for pancreatic cancer.

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