SIDT2 Transports Extracellular dsRNA into the Cytoplasm for Innate Immune Recognition

Extracellular double-stranded RNA is predominantly sensed by cytosolic RLRs after endocytic uptake, but how it enters the cytoplasm is unknown. Nguyen and colleagues demonstrate that the endo-lysosomal protein SIDT2 transports double-stranded RNA into the cytoplasm for RLR signaling and is required for survival after EMCV infection.

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