Journal
FRONTIERS OF MEDICINE
Volume 15, Issue 3, Pages 333-346Publisher
SPRINGER
DOI: 10.1007/s11684-020-0776-7
Keywords
innate immune; viral infection; intercellular signaling; metabolic changes; epigenetic changes
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The review summarizes the role of innate immunity in restricting RNA viral infections and discusses the intercellular transfer of pathogen and host-derived materials along with their epigenetic and metabolic interactions. This knowledge enhances the understanding of immune response to RNA viral infections.
RNA viruses cause a multitude of human diseases, including several pandemic events in the past century. Upon viral invasion, the innate immune system responds rapidly and plays a key role in activating the adaptive immune system. In the innate immune system, the interactions between pathogen-associated molecular patterns and host pattern recognition receptors activate multiple signaling pathways in immune cells and induce the production of pro-inflammatory cytokines and interferons to elicit antiviral responses. Macrophages, dendritic cells, and natural killer cells are the principal innate immune components that exert antiviral activities. In this review, the current understanding of innate immunity contributing to the restriction of RNA viral infections was briefly summarized. Besides the main role of immune cells in combating viral infection, the intercellular transfer of pathogen and host-derived materials and their epigenetic and metabolic interactions associated with innate immunity was discussed. This knowledge provides an enhanced understanding of the innate immune response to RNA viral infections in general and aids in the preparation for the existing and next emerging viral infections.
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