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A reverse vaccinology approach for the identification of potential vaccine candidates from Leishmania spp
Lijo John1, Georrge J John, Trupti Kholia
1Department of Bioinformatics, Christ College, Rajkot 360005, Gujarat, India.
Abstract:
Leishmaniasis is a group of diseases with a spectrum of clinical manifestations ranging from cutaneous ulcers to visceral leishmaniasis, which results from the bite of an infected sandfly to human. Attempts to develop an effective vaccine have been shown to be feasible but no vaccine is in active clinical use. This study adopts a Reverse Vaccinology approach to identify common vaccine candidates from both highly pathogenic species Leishmania major and Leishmania infantum. Total proteome of both species were compared to identify common proteins, which are further taken for sub-cellular localization and transmembrane helices prediction. Plasma membrane proteins having only one transmembrane helix were first identified and analyzed which are non-homologous in human and mouse in order to avoid molecular mimicry with other proteins. Selected proteins were analyzed for their binding efficiency to both major histocompatibility complex (MHC) class I and class II alleles. As a result, 19 potential epitopes are screened in this study using different approaches, which can be further verified through in vivo experiments in MHC compatible animal models. This study demonstrates that Reverse Vaccinology approach has potential in discovering various immunogenic antigens from in silico analysis of pathogen's genome or proteome instead of culturing the whole organism by conventional methods.
Insights
This study used reverse vaccinology to find new leishmaniasis vaccine candidates. Researchers identified 19 potential epitopes from common proteins in Leishmania major and Leishmania infantum for future testing.
Area of Science:
- * Infectious Diseases and Immunology
- * Computational Biology and Bioinformatics
Background:
- * Leishmaniasis presents diverse clinical forms, transmitted by sandfly bites, with no current vaccine available.
- * Developing an effective leishmaniasis vaccine remains a significant challenge in global health.
Purpose of the Study:
- * To identify common vaccine candidates against Leishmania major and Leishmania infantum using a reverse vaccinology approach.
- * To screen for immunogenic proteins and potential epitopes through in silico analysis.
Main Methods:
- * Comparative proteome analysis of Leishmania major and Leishmania infantum to identify shared proteins.
- * In silico prediction of sub-cellular localization, transmembrane helices, and human/mouse non-homology.
- * Analysis of selected proteins for Major Histocompatibility Complex (MHC) binding efficiency.
Main Results:
- * Identification of common proteins between Leishmania major and Leishmania infantum.
- * Screening of 19 potential epitopes with favorable characteristics for vaccine development.
- * Demonstrated feasibility of using reverse vaccinology for antigen discovery.
Conclusions:
- * Reverse vaccinology is a powerful in silico tool for identifying potential vaccine antigens against leishmaniasis.
- * The identified epitopes warrant further in vivo validation in appropriate animal models.
- * This approach offers an alternative to traditional methods for vaccine candidate discovery.
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