Vaccinomics strategy to concoct a promising subunit vaccine for visceral leishmaniasis targeting sandfly and leishmania antigens.

Abstract:

:Visceral leishmaniasis (VL) has been declared as one of the most severely neglected tropical diseases by the World Health Organization report 2017. Cumulative incidences of treatment failure and drug resistance, demanding a potential treatment and preventive strategy for VL. In this study, we have devised a multi-epitope vaccine by targeting sandfly saliva and parasite-derived membrane and secretory antigens. We have predicted the immunogenic B-cell, HTL, and CTL epitopes from all the selected protein sequences. The epitopes were then linked to the spacer sequences for providing stability and flexibility, and the construct was linked with a synthetic TLR-4 agonist namely RS09 as an adjuvant. The 3D structure of vaccine was modelled, refined and validated by generating a Ramachandran plot. Later, molecular docking was performed between the TLR-4 receptor and vaccine. The obtained docked complex was then checked for their stability by performing MD simulation. The immune dynamics simulation was done to check the probable immune response generated when the host will be exposed to the vaccine candidate. This novel vaccine strategy will provide functional and mechanistic evidence on parasite and vector-derived epitopes that could activate B- and T-cells and potentially elicit a long-lasting memory cell response.

journal_name

Int J Biol Macromol

authors

Ojha R,Pandey RK,Prajapati VK

doi

10.1016/j.ijbiomac.2020.04.097

subject

Has Abstract

pub_date

2020-08-01 00:00:00

pages

548-557

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(20)32960-3

journal_volume

156

pub_type

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