Host Cell Virus Interactions: Molecular Mechanisms, Immune Modulation, Viral Pathogenesis, and Emerging Therapeutic Targets
2026
Awadh Alanazi | Mohamed N. Ibrahim | Eman Fawzy El Azab | Mohamed A. Elithy
Host–virus relationships regulate every phase of viral infection and critically influence course of illness and the effectiveness of treatment. Viruses utilize host receptors, intracellular trafficking routes, metabolic programs, and immunological signaling networks to introduce infection, while host cells use innate and adaptive immune responses that both limit viral replication and, in certain situations, cause tissue damage. Given the fast viral evolution and drug resistance linked to virus-directed therapy, there is growing proof that these host-dependent mechanisms are appealing and underutilized targets for antiviral treatment. Recent developments in single-cell technology, proteomics, and functional genomics have made it possible to systematically identify host dependency and restriction factors shared by different viral families, exposing common molecular vulnerabilities that might be targeted therapeutically. This review integrates current knowledge of virus–host interplay via a translational lens, highlighting processes that directly guide the formation of host-directed antivirals and immune-regulating treatments. We emphasize host processes involved in viral entry, replication, and immune signaling that have shown therapeutic significance, while illustrating the difficulties of balancing antiviral effectiveness with immunopathology. By framing host–virus interactions through a therapeutic lens, this review attempts to offer a targeted and translationally relevant viewpoint for next-generation antiviral research.
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