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.
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: Albert Z Kapikian; Lone Simonsen; Timo Vesikari; Yasutaka Hoshino; David M Morens; Robert M Chanock; John R La Montagne; Brian R Murphy Journal: J Infect Dis Date: 2005-09-01 Impact factor: 5.226
Authors: M L Clements-Mann; M K Makhene; J Mrukowicz; P F Wright; Y Hoshino; K Midthun; E Sperber; R Karron; A Z Kapikian Journal: Vaccine Date: 1999-06-04 Impact factor: 3.641
Authors: A Z Kapikian; R G Wyatt; M M Levine; R H Yolken; D H VanKirk; R Dolin; H B Greenberg; R M Chanock Journal: J Infect Dis Date: 1983-01 Impact factor: 5.226
Authors: Joshua Ndung'u Gikonyo; Betty Mbatia; Patrick W Okanya; George F O Obiero; Carlene Sang; Duncan Steele; James Nyangao Journal: Int J Infect Dis Date: 2020-09-06 Impact factor: 3.623