Abstract

In the past decade, cancer immunotherapy has achieved great success owing to the unravelling of unknown molecular forces in cancer immunity. However, it is critical that we address the limitations of current immunotherapy, including immune-related adverse events and drug resistance, and further enhance current immunotherapy. Lipids are reported to play important roles in modulating immune responses in cancer. Cancer cells use lipids to support their aggressive behaviour and allow immune evasion. Metabolic reprogramming of cancer cells destroys the equilibrium between lipid anabolism and catabolism, resulting in lipid accumulation within the tumour microenvironment (TME). Consequently, ubiquitous lipids, mainly fatty acids, within the TME can impact the function and phenotype of infiltrating immune cells. Determining the complex roles of lipids and their interactions with the TME will provide new insight for improving anti-tumour immune responses by targeting lipids. Herein, we present a review of recent literature that has demonstrated how lipid metabolism reprogramming occurs in cancer cells and influences cancer immunity. We also summarise the potential for lipid-based clinical translation to modify immune treatment.

Highlights

  • A Forgotten Corner in Cancer ImmunotherapyReviewed by: Alpaslan Tasdogan, University of Texas Southwestern Medical Center, United States

  • Since current immunotherapy has shown dramatic effects in controlling cancer, research into immune responses in cancer has attracted great interest

  • IL-6 delivers signals through the STAT3 pathway, and recent studies have reported that CD36 is a downstream target of activated STAT3, suggesting that upregulation of IL-6 expression would further increase the uptake of fatty acids (FAs) by cancer cells [27, 28]

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Summary

A Forgotten Corner in Cancer Immunotherapy

Reviewed by: Alpaslan Tasdogan, University of Texas Southwestern Medical Center, United States. Lipids are reported to play important roles in modulating immune responses in cancer. Cancer cells use lipids to support their aggressive behaviour and allow immune evasion. Metabolic reprogramming of cancer cells destroys the equilibrium between lipid anabolism and catabolism, resulting in lipid accumulation within the tumour microenvironment (TME). Ubiquitous lipids, mainly fatty acids, within the TME can impact the function and phenotype of infiltrating immune cells. Determining the complex roles of lipids and their interactions with the TME will provide new insight for improving anti-tumour immune responses by targeting lipids. We present a review of recent literature that has demonstrated how lipid metabolism reprogramming occurs in cancer cells and influences cancer immunity.

INTRODUCTION
INTERACTION BETWEEN LIPIDS AND TUMOUR CELLS
Lipid Metabolism Reprogramming in Tumour Cells
Cancer Cell Pathways Driven by Lipid Metabolites
LIPIDS AND IMMUNE RESPONSES IN CANCER
T Cells
Macrophages
Neutrophils and Myeloid-Derived Suppressor Cells
Others
LIPIDS AND THEIR POTENTIAL APPLICATIONS
New Immunotherapeutic Strategies by Targeting Lipid Reprogramming
Combination Therapy Based on Lipid Regulation
Lipids as Biomarkers of Anti-Tumour Immunity
Findings
CONCLUSIONS

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