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Review
. 2022 Sep 15:12:975398.
doi: 10.3389/fcimb.2022.975398. eCollection 2022.

Serological cross-reactivity among common flaviviruses

Kai Rol Chan  1 , Amni Adilah Ismail  2 , Gaythri Thergarajan  1 , Chandramathi Samudi Raju  2 , Hock Chai Yam  1 , Manikam Rishya  3 , Shamala Devi Sekaran  1
Affiliations
Review

Serological cross-reactivity among common flaviviruses

Kai Rol Chan et al. Front Cell Infect Microbiol. .

Abstract

The Flavivirus genus is made up of viruses that are either mosquito-borne or tick-borne and other viruses transmitted by unknown vectors. Flaviviruses present a significant threat to global health and infect up to 400 million of people annually. As the climate continues to change throughout the world, these viruses have become prominent infections, with increasing number of infections being detected beyond tropical borders. These include dengue virus (DENV), West Nile virus (WNV), Japanese encephalitis virus (JEV), and Zika virus (ZIKV). Several highly conserved epitopes of flaviviruses had been identified and reported to interact with antibodies, which lead to cross-reactivity results. The major interest of this review paper is mainly focused on the serological cross-reactivity between DENV serotypes, ZIKV, WNV, and JEV. Direct and molecular techniques are required in the diagnosis of Flavivirus-associated human disease. In this review, the serological assays such as neutralization tests, enzyme-linked immunosorbent assay, hemagglutination-inhibition test, Western blot test, and immunofluorescence test will be discussed. Serological assays that have been developed are able to detect different immunoglobulin isotypes (IgM, IgG, and IgA); however, it is challenging when interpreting the serological results due to the broad antigenic cross-reactivity of antibodies to these viruses. However, the neutralization tests are still considered as the gold standard to differentiate these flaviviruses.

Keywords: antibodies; antibody assays; cross-protection; flaviviruses; serological cross reactivity.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Flavivirus genomic organization. (A) A schematic representation of Flavivirus genomic organization. (B) Primary structure of Flavivirus E protein ectodomain showing EDI (pink), EDII (light blue), and EDIII (orange). The stem region and the transmembrane (TM) domain represented in black and blue, respectively.
Figure 2
Figure 2
The protein-dimer structure of DENV1 E protein and EAEPPFG epitope located at domain III. The brown, black, and blue circle represent the domain I, domain II, and domain III, respectively, in one E protein monomer. Another monomer is colored gray. The red spheres located in EDIII represent the EAEPPEG epitope.
Figure 3
Figure 3
Structure of 2A10G6 epitope of DENV1 E protein. The 98DRXW101 motif is labeled and colored as blue, purple, yellow, and orange, respectively, according to the residue sequence.
See this image and copyright information in PMC

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