Interferons (IFNs) play pivotal roles in shaping the immune responses in mammals and are particularly important for the control of viral infections, cell growth, and immune regulation. These proteins rapidly induce an anti-viral state in cells that surround infected cells. In order to survive, viruses have evolved with multiple strategies to evade the anti-viral effects of IFNs. Elucidating the molecular and cellular biology of the virus-interferon interaction is key to understanding issues, such as viral pathogenesis, latency, and the development of novel antivirals. In this book, international experts review current research topics, producing a timely overview of this exciting field. The book opens with a chapter that comprehensively reviews the antiviral effects of extracellular double-stranded RNA - the viral toxin. This is followed by chapters that review the properties of type I and type III interferons, and the role of interferon-stimulated genes. Additional chapters are devoted to understanding the diverse strategies used by clinically-relevant human viruses to subvert host interferon responses. The book closes with an interesting overview of the clinical application of interferons as antiviral and anticancer agents. It will be essential reading for every scientist involved in interferon or antiviral research and will be a recommended text for all virology laboratories.

This book explores methods to study the complex and evolving interplay between a virus and its host that range from model systems to the detection of chemical molecules. The collection starts with the application of humanized mice and zebrafish as model organisms to study virus-host interactions and induction of innate immune responses. Subsequent chapters outline diverse methods to detect small interfering RNAs, microRNAs, and virus-derived dsRNA from a variety of cells, tissues, and organisms, as well as to interrogating the cytosolic RNA and DNA sensing pathways, including using RNA PAMPs as molecular tools, purification of cGAMP from virus particles and infected cells, and mechanisms to visualize the subcellular localization and activation of the adaptor proteins MAVS and STING. Cutting-edge methods, including high-throughput and genome-wide CRISPR/Cas9 screens, chromosome conformation capture, and whole-exome sequencing, are described to identify novel mediators, pathways, and variants underlying host susceptibility. Given the importance of studying these pathways and players under physiologic conditions, methods describing the isolation of primary mouse sensory neurons and group 2 innate lymphoid cells are also provided. Finally, this collection comes full circle back to the whole organism level and concludes with epidemiological methods to investigate virus-host interactions and the induction of innate immunity. Written for the Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and practical, Innate Antiviral Immunity: Methods and Protocols spans a diverse array of approaches to study and elucidate the intricacies of this vital area of study. The chapter 'Morphological Separation of Clustered Nuclei in Histological Images' is published open access under a CC BY 4.0 license at link.springer.com.