Differential Immune Response Against Recombinant Leishmania Donovani Peroxidoxin 1 and Peroxidoxin 2 Proteins in BALB/c Mice
Overview
Affiliations
We assessed the immune response against recombinant proteins of two related, albeit functionally different, peroxidoxins from Leishmania donovani: peroxidoxin 1 (LdPxn1) and peroxidoxin 2 (LdPxn2) in BALB/c mice. We also evaluated the effect of coadministration of TLR agonists (CpG ODN and GLA-SE) on the antigen-specific immune response. Immunization with recombinant LdPxn1 alone induced a predominantly Th2 type immune response that is associated with the production of high level of IgG1 and no IgG2a isotype while rLdPxn2 resulted in a mixed Th1/Th2 response characterized by the production of antigen-specific IgG2a in addition to IgG1 isotype. Antigen-stimulated spleen cells from mice that were immunized with rLdPxn1 produced low level of IL-10 and IL-4 and no IFN-γ, whereas cells from mice immunized with rLdPxn2 secreted high level of IFN-γ, low IL-4, and no IL-10. Coadministration of CpG ODN or GLA-SE with rLdPxn1 skewed the immune response towards a Th 1 type as indicated by robust production of IgG2a isotype. Furthermore, the presence of TLR agonists together with rLdPxn1 antigen enhanced the production of IFN-γ and to a lesser extent of IL-10. TLR agonists also enhanced a more polarized Th 1 type immune response against rLdPxn2.
Bufan B, Arsenovic-Ranin N, Zivkovic I, Curuvija I, Blagojevic V, Dragacevic L Vaccines (Basel). 2024; 12(7).
PMID: 39066381 PMC: 11281378. DOI: 10.3390/vaccines12070743.
Gebremeskele B, Adane G, Adem M, Tajebe F Syst Rev. 2023; 12(1):240.
PMID: 38115138 PMC: 10731771. DOI: 10.1186/s13643-023-02422-y.
Th1 and Th2 epitopes of Cowdria polymorphic gene 1 of Ehrlichia ruminantium.
Ngoepe T, Pretorius A, Steyn H, Van Kleef M Onderstepoort J Vet Res. 2023; 90(1):e1-e15.
PMID: 37042556 PMC: 10091069. DOI: 10.4102/ojvr.v90i1.2070.
Vivaxin genes encode highly immunogenic, non-variant antigens on the Trypanosoma vivax cell-surface.
Romero-Ramirez A, Casas-Sanchez A, Autheman D, Duffy C, Brandt C, Clare S PLoS Negl Trop Dis. 2022; 16(9):e0010791.
PMID: 36129968 PMC: 9529106. DOI: 10.1371/journal.pntd.0010791.
Culbreth M, Biryukov S, Shoe J, Dankmeyer J, Hunter M, Klimko C Vaccines (Basel). 2019; 7(4).
PMID: 31816945 PMC: 6963655. DOI: 10.3390/vaccines7040205.