Abstract:
:West Nile virus (WNV) and Japanese encephalitis virus (JEV), the members of JEV serocomplex group are pathogens of global health concern. The co-circulation of these viruses poses challenges in effective diagnostics due to antigenic similarity between the E-protein of these viruses. The present study aimed to design chimeric peptides and study the immune response against the same. B-cell epitopes were predicted on structural proteins of WNV and JEV based on bioinformatics tools. The peptides representing to these B-cell epitopes were synthesized and subjected to ELISA. Two peptides, one each from WNV (named WE147) and JEV (named JE40) E-protein, showed virus-specific and strong reactivity to the immune mice sera and human clinical samples. The chimeric peptides for WNV and JEV were constructed by synthesizing the B-cell epitope of WNV (WE147) or JEV (JE40) with T-helper epitope (JM17) separated by diglycine spacer in between. The immune response generated against these chimeric peptides was found to be specific to the respective B-cell epitopes. The anti-peptide sera showed virus-specific reactivity in ELISA and in immunofluorescence assay with no cross-reactivity. Also, the anti-peptide sera could neutralize JE and WN viruses in an in vitro virus neutralization assay. The B-cell epitopes identified in the present study may be used as diagnostic markers for differentiating between WN and JE virus infections. The present study can form a basis for future design of vaccines.
journal_name
Virus Resjournal_title
Virus researchauthors
Gangwar RS,Shil P,Sapkal GN,Khan SA,Gore MMdoi
10.1016/j.virusres.2011.08.008subject
Has Abstractpub_date
2012-01-01 00:00:00pages
40-50issue
1eissn
0168-1702issn
1872-7492pii
S0168-1702(11)00310-8journal_volume
163pub_type
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