Roles of circRNAs in the tumour microenvironment.

Area of Science:

• Oncology
• Molecular Biology
• Gene Regulation

Background:

• The tumor microenvironment (TME) is crucial in cancer progression and metastasis.
• Circular RNAs (circRNAs) are key regulators of gene expression with diverse roles in cancer.
• The specific mechanisms by which circRNAs influence the TME are not fully understood.

Purpose of the Study:

• To review the multifaceted roles of circRNAs in regulating the tumor microenvironment (TME).
• To explore the impact of circRNAs on key TME processes like immune surveillance and angiogenesis.
• To highlight the therapeutic potential of circRNAs in cancer treatment.

Main Methods:

• Literature review and analysis of existing studies on circRNAs and the TME.
• Synthesis of current knowledge on circRNA functions within the TME.
• Discussion of circRNAs' roles in immune evasion, angiogenesis, hypoxia, and matrix remodeling.

Main Results:

• CircRNAs significantly modulate immune surveillance, angiogenesis, hypoxia, and matrix remodeling within the TME.
• Exosomal circRNAs (exo-circRNAs) play a role in intercellular communication within the TME.
• CircRNAs are implicated in resistance to chemoradiation therapies.

Conclusions:

• CircRNAs are critical regulators of the tumor microenvironment (TME) with diverse functions.
• Targeting circRNAs presents a novel therapeutic strategy to overcome cancer resistance.
• CircRNAs hold potential as noninvasive biomarkers for cancer diagnosis and prognosis.