RNA modifications in the tumor microenvironment: insights into the cancer-immunity cycle and beyond

You-Peng Ding1, Cui-Cui Liu1, Ke-Da Yu2

  • 1Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Cancer Institute, Department of Oncology, Shanghai Medical College, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, China.

Insights

RNA modifications are crucial in cancer, impacting the tumor microenvironment and immune response. Targeting RNA modifying enzymes and exploring extracellular RNA present new therapeutic avenues in oncology.

Area of Science:

  • Molecular Biology
  • Oncology
  • Immunology

Background:

  • Chemical modifications regulate biological molecule functions, with RNA modifications gaining attention due to advanced detection.
  • Dysregulated RNA modifications (m6A, m1A, m5C, m7G, pseudouridylation, A to I editing) are implicated in cancer.
  • The tumor microenvironment's role is increasingly studied in relation to RNA modifications.

Purpose of the Study:

  • To review RNA modifications within the tumor microenvironment.
  • To connect RNA modifications to the Cancer-Immunity Cycle.
  • To highlight emerging research questions and therapeutic strategies.

Main Methods:

  • Literature review focusing on RNA modifications in cancer.
  • Analysis of RNA modifications through the lens of the Cancer-Immunity Cycle.
  • Discussion of RNA modifying enzymes and novel drug modalities.

Main Results:

  • RNA modifications significantly influence interactions within the tumor microenvironment.
  • Extracellular RNA modifications and microbiome influence are key areas for future research.
  • RNA modifying enzymes (FTO, ALKBH5, METTL3, PUS7) show potential as biomarkers and therapeutic targets.

Conclusions:

  • RNA modifications play a critical regulatory role in the tumor microenvironment.
  • Targeting RNA modifying enzymes offers potential for combination immunotherapies.
  • Antibody-drug conjugates (ADCs) and modified RNA mimetics represent novel therapeutic strategies.

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