Neutralizing antibodies from prior exposure negatively correlate with dengue viremia and may influence serotype dominance

Author:

Anantharaj Anbalagan1,Agrawal Tanvi1ORCID,Shashi Pooja1,Tripathi Alok1,Kumar Parveen1,Khan Imran1,Pareek Madhu1,Singh Balwant1,Kumar Saurabh1,Pandey Rajesh2,Chandele Anmol3,Lodha Rakesh4,Whitehead Steve5ORCID,Medigeshi Guruprasad1ORCID

Affiliation:

1. Translational Health Science and Technology Institute

2. CSIR-Institute of Genomics and Integrative Biology

3. ICGEB-Emory Vaccine Center, International Centre for Genetic Engineering and Biotechnology

4. All India Institute of Medical Sciences

5. National Institute of Allergy and Infectious Diseases

Abstract

Abstract India is hyperendemic to dengue virus and over 50% of the adults are seropositive but there is limited information on the association between prior dengue exposure with neutralizing antibody profiles and how this could influence virus evolution and vaccine development. In this work, we found that the dengue seropositivity increased with age and pre-existing antibody levels negatively correlated with viremia during acute phase of illness. Adults showed a higher levels of viremia which associated with lower levels of neutralizing antibodies as compared to children. The titers of neutralizing antibodies negatively influenced the dominance of circulating dengue serotypes with highest levels of the neutralizing antibodies against DENV-2 followed by DENV-1, DENV-3 and DENV-4. We observed minimal cross-reactivity of neutralizing antibodies with related flaviviruses such as Japanese encephalitis virus and West Nile virus and the antibodies elicited against Indian isolates show a reduced ability to neutralize international dengue isolates.

Publisher

Research Square Platform LLC

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