FIGURE 2.
Roles of m6A-modified circRNAs in immunity. m6A can mark “self” circRNAs and these endogenous circRNAs inhibite innate immune responses, whereas exogenous circRNAs can activate innate immunity by activating RIG-I in the presence of K63-polyubiquitin. In tumor immunity, circRNAs may inhibit tumor progression by inducing anti-tumor immunity.