Abstract
Neutralizing antibody responses were examined in monkeys after dengue virus infections. In monkeys that had been infected once or twice with DENV-2, neutralizing antibody was cross-reactive with all four serotypes after secondary or tertiary infection with DENV-3. In monkeys that had been inoculated with DENV-1 and DENV-2 in the primary and secondary infections, neutralizing antibody titers did not increase after tertiary infection with DENV-3. These results indicate that antibody responses after secondary and tertiary infections with different serotypes are cross-reactive with all four serotypes, consistent with what has been observed in humans, and suggest that monkeys are useful for determining neutralizing antibody responses.
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Acknowledgments
Animal procedures were approved by the Committees on Biosafety and Animal Handling and Ethical Regulations of the National Institute of Infectious, Diseases, Japan. This work was supported by the Research on Emerging and Re-emerging Infectious Diseases from Ministry of Health, Labour and Welfare, Japan (H17-Shinkou-019 and H20-Shinkou-ippan-015), and the Research on Biological Resources and Animal Models for Drug Development from Ministry of Health, Labour and Welfare, Japan (H19-Seibutsushigen-ippan-003).
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Ito, M., Katakai, Y., Ono, F. et al. Serotype-specific and cross-reactive neutralizing antibody responses in cynomolgus monkeys after infection with multiple dengue virus serotypes. Arch Virol 156, 1073–1077 (2011). https://doi.org/10.1007/s00705-011-0959-2
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DOI: https://doi.org/10.1007/s00705-011-0959-2