The role of circular RNAs in regulating cytokine signaling in cancer.

Dysregulation of cytokine signaling is central to the development and progression of cancer. Cytokines are not only involved in promoting cancer development but also regulate anti-tumor immune responses. Circular RNAs (circRNAs) are single-stranded, covalently closed RNA molecules lacking free ends, which have emerged as critical regulators of cytokine signaling. Transcriptional and post-transcriptional regulation of cytokine signaling by circRNAs contributes to cancer pathogenesis. Here, we discuss the emerging role of circRNAs in modulating cytokine signaling pathways that regulate cancer development. In particular, we examine the role of circRNAs in TGF-β, IL-6, IL-10, TNF-α, VEGF, FGF, PDGF, and chemokine signaling in cancer.