Resistance to rotavirus infection in adult volunteers challenged with a virulent G1P1A[8] virus correlated with serum immunoglobulin G antibodies to homotypic viral proteins 7 and 4.

Abstract

BACKGROUND:

In a study performed in 1983, 18 adult volunteers received oral challenge with the virulent human rotavirus strain D (G1P1A[8],NSP4[B]). To identify correlates of resistance to rotavirus infection, we analyzed levels of serum immunoglobulin (Ig) A and IgG antibodies to various rotaviral antigens in 16 of the 18 volunteers.

METHODS:

We used immunocytochemical assays that involved a total of 16 different recombinant baculoviruses, with each baculovirus expressing one of the following major serotype/genotype rotavirus proteins for the serologic assays: (1) viral protein (VP) 4 with P1A[8], P1B[4], P2A[6], P3[9], or P4[10] specificity; (2) VP7 with G1-G4 or G9 specificity; and (3) nonstructural viral protein (NSP) 4 with genotype A, B, C, or D specificity.

RESULTS:

The prechallenge titers of IgG antibody to VP7 types G1, G3, G4, and G9; VP4 types P1A[8], P1B[4], P2A[6], and P4[10]; and NSP4 type [A] in the group of noninfected volunteers (n = 11) were significantly higher than those in the group of infected volunteers (n = 5; of these 5 volunteers, 4 were symptomatically infected). Moreover, logistic regression analysis showed that resistance to rotavirus infection most closely correlated with higher prechallenge titers of IgG antibody to homotypic VP7 (G1) and VP4 (P1A[8]).

CONCLUSIONS:

These results suggest that protection against rotavirus infection and disease is primarily VP7/VP4 homotypic and, to a lesser degree, heterotypic.

• Authors: Lijuan Yuan, Shinjiro Honma, Inyoung Kim, Albert Z Kapikian, Yasutaka Hoshino
• Journal: The Journal of infectious diseases (J Infect Dis) Vol. 200 Issue 9 Pg. 1443-51 (Nov 01 2009) ISSN: 1537-6613 [Electronic] United States
• PMID: 19785527 (Publication Type: Journal Article, Research Support, N.I.H., Intramural)

Chemical References

• Antigens, Viral
• Capsid Proteins
• Immunoglobulin A
• Immunoglobulin G
• VP4 protein, Rotavirus
• VP7 protein, Rotavirus

Topics

• Adolescent
• Adult
• Antibody Specificity (immunology)
• Antigens, Viral (classification, immunology)
• Capsid Proteins (classification, immunology)
• Female
• Humans
• Immunoglobulin A (immunology)
• Immunoglobulin G (immunology)
• Male
• Rotavirus (classification, immunology)
• Rotavirus Infections (immunology)
• Young Adult