Implications of Dengue Virus Maturation on Vaccine Induced Humoral Immunity in Mice

Viruses

卷:13

Daniel Watterson¹  Naphak Modhiran¹  Connor A. P. Scott¹  Keith J. Chappell¹  Jody Hobson-Peters¹  Summa Bibby¹  David A. Muller¹  Roy A. Hall¹  Alberto A. Amarilla¹  Natalee D. Newton¹  Paul R. Young¹ 

[1] School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia;

关键词: dengue;    vaccination;    ADE;    virology;    microbiology;    flavivirus;   

DOI  :  10.3390/v13091843

来源: DOAJ

【 摘 要 】

The use of dengue virus (DENV) vaccines has been hindered by the complexities of antibody dependent enhancement (ADE). Current late-stage vaccine candidates utilize attenuated and chimeric DENVs that produce particles of varying maturities. Antibodies that are elicited by preferentially exposed epitopes on immature virions have been linked to increased ADE. We aimed to further understand the humoral immunity promoted by DENV particles of varying maturities in an AG129 mouse model using a chimeric insect specific vaccine candidate, bDENV-2. We immunized mice with mature, partially mature, and immature bDENV-2 and found that immunization with partially mature bDENV-2 produced more robust and cross-neutralizing immune responses than immunization with immature or mature bDENV-2. Upon challenge with mouse adapted DENV-2 (D220), we observed 80% protection for mature bDENV-2 vaccinated mice and 100% for immature and partially mature vaccinated mice, suggesting that protection to homotypic challenge is not dependent on maturation. Finally, we found reduced in vitro ADE at subneutralising serum concentrations for mice immunized with mature bDENV-2. These results suggest that both immature and mature DENV particles play a role in homotypic protection; however, the increased risk of in vitro ADE from immature particles indicates potential safety benefits from mature DENV-based vaccines.

【 授权许可】

Unknown