Title
High-through identification of T cell-specific phage-exposed mimotopes using PBMCs from tegumentary leishmaniasis patients and their use as vaccine candidates against Leishmania amazonensis infection
Date Issued
01 March 2019
Access level
metadata only access
Resource Type
journal article
Author(s)
Carvalho G.B.
Costa L.E.
Lage D.P.
Ramos F.F.
Santos T.T.O.
Ribeiro P.A.F.
Dias D.S.
Salles B.C.S.
Lima M.P.
Carvalho L.M.
Dias A.C.S.
Alves P.T.
Franklin M.L.
Silva R.A.M.
Duarte M.C.
Menezes-Souza D.
Roatt B.M.
Goulart L.R.
Teixeira A.L.
Coelho E.A.F.
Publisher(s)
Cambridge University Press
Abstract
In the current study, phage-exposed mimotopes as targets against tegumentary leishmaniasis (TL) were selected by means of bio-panning cycles employing sera of TL patients and healthy subjects, besides the immune stimulation of peripheral blood mononuclear cells (PBMCs) collected from untreated and treated TL patients and healthy subjects. The clones were evaluated regarding their specific interferon-γ (IFN-γ) and interleukin-4 (IL-4) production in the in vitro cultures, and selectivity and specificity values were calculated, and those presenting the best results were selected for the in vivo experiments. Two clones, namely A4 and A8, were identified and used in immunization protocols from BALB/c mice to protect against Leishmania amazonensis infection. Results showed a polarized Th1 response generated after vaccination, being based on significantly higher levels of IFN-γ, IL-2, IL-12, tumour necrosis factor-α (TNF-α) and granulocyte-macrophage colony-stimulating factor (GM-CSF); which were associated with lower production of specific IL-4, IL-10 and immunoglobulin G1 (IgG1) antibodies. Vaccinated mice presented significant reductions in the parasite load in the infected tissue and distinct organs, when compared with controls. In conclusion, we presented a strategy to identify new mimotopes able to induce Th1 response in PBMCs from TL patients and healthy subjects, and that were successfully used to protect against L. amazonensis infection.
Start page
322
End page
332
Volume
146
Issue
3
Language
English
OCDE Knowledge area
Inmunología Biología celular, Microbiología Enfermedades infecciosas Parasitología
Scopus EID
2-s2.0-85053108385
PubMed ID
Source
Parasitology
ISSN of the container
00311820
Sponsor(s)
The authors thank the Program for Technological Development in Tools for Health-PDTIS-Fiocruz (Belo Horizonte, Minas Gerais, Brazil) for use of its facilities. This work was supported by grants from Instituto Nacional de Ciěncia e Tecnologia em Nanobiofarmacěutica (INCT Nano-Biofar), National Institute of Science and Technology in Theranostics and Nanobiotechnology (CNPq/CAPES/FAPEMIG, Process no. 465669/ 2014-0), FAPEMIG (CBB-APQ-00819-12 and CBB-APQ-01778-2014) and CNPq (APQ-482976/2012-8, APQ-488237/2013-0 and APQ-467640/2014-9). EAFC, ALT and LRG are grant recipients of CNPq. MACF is a grant recipient of CAPES/FAPEMIG.
Sources of information: Directorio de Producción Científica Scopus