Title
A recombinant Leishmania amastigote-specific protein, rLiHyG, with adjuvants, protects against infection with Leishmania infantum
Date Issued
01 June 2022
Access level
metadata only access
Resource Type
journal article
Author(s)
Machado A.S.
Lage D.P.
Vale D.L.
Freitas C.S.
Linhares F.P.
Cardoso J.M.O.
Pereira I.A.G.
Ramos F.F.
Tavares G.S.V.
Ludolf F.
Oliveira-da-Silva J.A.
Bandeira R.S.
Simões A.C.
Duarte M.C.
Oliveira J.S.
Christodoulides M.
Roatt B.M.
Martins V.T.
Coelho E.A.F.
Publisher(s)
Elsevier B.V.
Abstract
Vaccination against visceral leishmaniasis (VL) should be considered as a control measure to protect against disease, and amastigote-specific proteins could help to develop such vaccines, since this parasite form is in contact with the host immune system during the active disease. In this study, a Leishmania amastigote-specific protein, LiHyG, was evaluated as recombinant protein (rLiHyG) as vaccine candidate against Leishmania infantum infection in BALB/c mice. The protein was associated with saponin (rLiHyG/Sap) or Poloxamer 407-based polymeric micelles (rLiHyG/Mic) as adjuvants, and animals receiving saline, saponin or micelle as controls. Immunological and parasitological analyses were performed before (n = 8 per group; as primary endpoint) and after (n = 8 per group; as secondary endpoint) infection. Results showed that, in both endpoints, rLiHyG/Sap and rLiHyG/Mic induced higher levels of IFN-γ, IL-12 and GM-CSF in spleen cell cultures from vaccinated animals, besides elevated presence of IgG2a isotype antibodies. Decreased hepatotoxicity and ‘positive lymphoproliferative response were also found after challenge. Such findings reflected in significantly lower levels of parasite load found in their spleens, livers, bone marrows and draining lymph nodes. In conclusion, rLiHyG associated with Th1-type adjuvant could be considered for future studies as vaccine candidate to protect against VL.
Volume
230
Language
English
OCDE Knowledge area
Enfermedades infecciosas
Inmunología
Subjects
Scopus EID
2-s2.0-85126854017
PubMed ID
Source
Acta Tropica
ISSN of the container
0001706X
Sponsor(s)
This work was supported by grant APQ-408,675/2018–7 from the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and by grant APQ-02 , 167–21 from the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), Brazil . The authors also thank the Brazilian agencies Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and CNPq for the student scholarships.
Sources of information:
Directorio de Producción Científica
Scopus