Enveloped virus

Enveloped viruses are a broad category of viruses characterized by an outer lipid bilayer membrane, which they typically acquire from the host cell's membrane during the budding process (NIH, 2023). This lipid envelope is embedded with viral proteins, primarily glycoproteins, which are critical for host cell recognition, attachment, and membrane fusion (Wikipedia, 2024). This group includes many significant human pathogens, such as the Human Immunodeficiency Virus (HIV), Influenza viruses, Coronaviruses (including SARS-CoV-2), and the Ebola virus (CDC, 2022). Because "enveloped viruses" describes a diverse class of infectious agents rather than a single molecule, it is not considered a specific therapeutic target in the traditional sense; instead, drug discovery focuses on specific viral enzymes or surface proteins within these viruses (Nature Reviews Drug Discovery, 2020). Common therapeutic strategies include the use of fusion inhibitors to prevent entry, as well as protease and polymerase inhibitors to halt replication (StatPearls, 2023). The presence of the lipid envelope also makes these viruses susceptible to certain detergents and disinfectants that disrupt the membrane integrity (WHO, 2020).

Other names

Lipid-enveloped virusMembranous virus

Antiviral agents targeting enveloped viruses operate through several distinct mechanisms: fusion inhibitors (e.g., enfuvirtide) block the merging of the viral envelope with the host cell membrane; entry inhibitors (e.g., maraviroc) prevent the virus from binding to host receptors; and internal enzyme inhibitors (e.g., protease and polymerase inhibitors) disrupt the viral replication cycle once the virus has entered the cell (StatPearls, 2023; PubChem, 2024).