Adjuvant effect of CTA1-DD/IgG on immune responses to mode antigen ovalbu-min / 中国免疫学杂志

ABSTRACT

Objective:To determine the immunological effects of a new type adjuvant CTA 1-DD/IgG.Methods:Intranasal im-munization of BALB/c mice with OVA in combination with adjuvant CTA 1-DD or CTA1-DD/IgG.Blood samples were subjected to OVA-specific IgG Abs detection and IgG subclass profiles assessment using ELISA.Splenic plasma cells secreting anti-OVA Abs were detected by ELISPOT.Results:CTA1-DD/IgG showed stronger activity in inducing OVA-specific IgG Abs and splenic Abs-secreting cells compared with CTA1-DD.The enhancement of IgG1,IgG2a and IgG2b Abs were observed,and the ratio IgG2a/IgG1 were >1 in both groups.Conclusion: CTA1-DD/IgG can exert enhanced adjuvant effects compared with CTA 1-DD.Mixed IgG subclasses are induced,indicating a more balanced Th1/Th2 response.