Host cells via viral entry mechanisms

Host cells via viral entry mechanisms refers to the complex series of biological interactions that allow a virus to penetrate the host cell membrane and release its genetic material into the cytoplasm. This process is initiated by the binding of viral surface glycoproteins to specific host cell receptors, such as the interaction between HIV-1 gp120 and the CD4 receptor or SARS-CoV-2 spike protein and ACE2 (Cossart & Helenius, 2014). Following attachment, viruses often require secondary co-receptors (e.g., CCR5 or CXCR4) to trigger membrane fusion or utilize endocytic pathways to gain entry (Marsh & Helenius, 2006). Because this term describes a broad physiological process and a collection of various host-pathogen interactions rather than a single molecular entity, it is classified as a therapeutic pathway or mechanism of action rather than a discrete target. Drugs targeting these mechanisms, such as entry and fusion inhibitors, are designed to block infection at the earliest stage, though they face challenges including rapid viral evolution and the need to avoid disrupting the host's endogenous receptor functions (Tilton & Doms, 2010).

Other names

Viral entry pathwayViral attachment and fusionHost cell entryViral internalization

Inhibition of viral attachment to host receptors, blockade of co-receptor binding, or prevention of viral-host membrane fusion.