Prediction of T Cell Epitopes from Leishmania major Potentially Excreted/Secreted Proteins Inducing Granzyme B Production

PloS One
Ikbel NaouarHechmi Louzir

Abstract

Leishmania-specific cytotoxic T cell response is part of the acquired immune response developed against the parasite and contributes to resistance to reinfection. Herein, we have used an immune-informatic approach for the identification, among Leishmania major potentially excreted/secreted proteins previously described, those generating peptides that could be targeted by the cytotoxic immune response. Seventy-eight nonameric peptides that are predicted to be loaded by HLA-A*0201 molecule were generated and their binding capacity to HLA-A2 was evaluated. These peptides were grouped into 20 pools and their immunogenicity was evaluated by in vitro stimulation of peripheral blood mononuclear cells from HLA-A2+-immune individuals with a history of zoonotic cutaneous leishmaniasis. Six peptides were identified according to their ability to elicit production of granzyme B. Furthermore, among these peptides 3 showed highest affinity to HLA-A*0201, one derived from an elongation factor 1-alpha and two from an unknown protein. These proteins could constitute potential vaccine candidates against leishmaniasis.

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Citations

Apr 20, 2016·Frontiers in Microbiology·Negar SeyedSima Rafati
Jun 6, 2018·Frontiers in Immunology·Rory C F De BritoAlexandre B Reis
Oct 26, 2018·Database : the Journal of Biological Databases and Curation·Alejandro LlanesRicardo Lleonart
Jun 11, 2021·Frontiers in Cell and Developmental Biology·Erina A Balmer, Carmen Faso

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Methods Mentioned

BETA
PCR
flow cytometry
density gradient centrifugation
enzyme-linked immunosorbent
ELISA
in silico methods

Software Mentioned

Matlab
Syfpeithi
RANKPEP
BIMAS
NetMHC
GraphPad Prism
GraphPad

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