Rotavirus A antigens (RVA antigens) (RVA antigens)

Rotavirus A antigens are the protein components of Rotavirus A, the primary pathogen responsible for severe, dehydrating diarrhea in infants and young children worldwide [CDC, 2023]. The viral capsid is composed of several structural proteins, most notably VP7 (G-protein) and VP4 (P-protein), which are the critical targets for the host's neutralizing antibody response [Crawford et al., 2017]. These antigens are the basis for current live-attenuated oral vaccines, such as Rotarix and RotaTeq, which aim to mimic natural infection and provide protective immunity [WHO, 2021]. Beyond structural roles, the non-structural protein NSP4 acts as a viral enterotoxin, disrupting cellular calcium homeostasis and contributing directly to the symptoms of gastroenteritis [Ball et al., 1996]. In clinical settings, these antigens serve as diagnostic markers detectable in stool samples via enzyme immunoassays to confirm infection [Desselberger, 2014]. Understanding the diversity and evolution of these antigens is vital for maintaining vaccine efficacy against circulating strains [Matthijnssens et al., 2008].

Other names

Rotavirus group A proteinsVP7 proteinVP4 proteinVP6 proteinNSP4 proteinG-proteinP-proteinOuter capsid proteins

Vaccines containing these antigens induce active immunity by stimulating the production of neutralizing antibodies (primarily secretory IgA) and memory B and T cells to prevent viral entry and replication [WHO, 2021]. Antiviral agents like nitazoxanide may inhibit viral replication by interfering with the maturation of viral proteins and disrupting viral morphogenesis [Rossignol, 2014].