Rotavirus viral antigens (RV antigens)

Rotavirus viral antigens are the protein components of the Rotavirus, a genus of double-stranded RNA viruses within the Reoviridae family that serves as the primary cause of severe, dehydrating diarrhea in children globally (CDC, 2023). The virus particle consists of three concentric protein layers: the outer layer contains VP7 and VP4, the middle layer is composed of VP6, and the inner core contains VP2, VP1, and VP3 (StatPearls, 2023). VP7 (a glycoprotein) and VP4 (a protease-cleaved protein) are the major targets for neutralizing antibodies and define the G and P serotypes of the virus, respectively, making them the primary focus of vaccine development (PubMed, 2021). Additionally, the non-structural protein NSP4 acts as a viral enterotoxin, playing a key role in the induction of diarrhea by altering calcium homeostasis and activating signal transduction pathways in host enterocytes (UniProt, 2024). Other antigens like VP6 are highly conserved and serve as the basis for most diagnostic assays due to their high abundance in the viral particle (PubMed, 2022). Therapeutic interventions primarily involve live-attenuated vaccines that present these antigens to the immune system to elicit protective mucosal and systemic immunity, effectively reducing the global burden of rotavirus-associated morbidity (WHO, 2021).

Other names

Rotavirus proteinsRVVPVP4 (Protease-cleaved protein)VP7 (Glycoprotein)VP6 (Inner capsid protein)NSP4 (Non-structural protein 4)Rotavirus structural proteinsRotavirus non-structural proteins

Vaccines containing these antigens induce the production of neutralizing antibodies, primarily targeting the VP4 and VP7 proteins, which prevent viral attachment and entry into intestinal enterocytes (CDC, 2023). Passive immunization with specific antibodies can also neutralize the virus directly by binding to these surface antigens (PubMed, 2021).