An immunoprophylactic evaluation of -ODC derived HLA-A0201 restricted peptides against visceral leishmaniasis.

Five (5) HLA-A 0201 restricted epitopes of ornithine decarboxylase derived from (ODC) were examined by reverse vaccinology to develop prophylactics against visceral leishmaniasis (VL). These consensus epitopes comprising (P1: RLMPSAHAI, P2: LLDQYQIHL, P3: GLYHSFNCI, P4: AVLEVLSAL and P5: RLPASPAAL) were observed and presented by diverse HLA alleles screened by immune-informatics tools. These epitopes were also observed for strong stability for appropriate immune response in screening and molecular dynamics.

Evaluating the immunomodulatory responses of LdODC-derived MHC Class-II restricted peptides against VL.

In a bid to develop a novel immunoprophylactic measure against visceral leishmaniasis (VL), MHC class-II-restricted epitopes of LdODC were identified by reverse vaccinology approach. Five consensus HLA-DRB1*0101-restricted epitopes were screened. The analysis revealed that the set of epitopes was presented by at least 54 diverse MHC class-II alleles.

Synthesis and systemic toxicity assessment of quinine-triazole scaffold with antiprotozoal potency.

A series of hybrid antiprotozoal compounds with quinine-triazolyl scaffold were prepared by copper catalyzed Huisgen 1,3-dipolar cycloaddition via O-mesylation with mesyl chloride followed by azide displacement. The synthesized azide derivative was made to react with various aromatic and aliphatic alkynes. The triazolyl-linked quinine scaffolds were synthesized under solvent-free mechanochemical ball milling conditions.

Immunomodulation induced through ornithine decarboxylase DNA immunization in Balb/c mice infected with Leishmania donovani.

We report here a Leishmania donovani ornithine decarboxylase (Ld-ODC) gene used as a DNA vaccine against visceral leishmaniasis in a murine Balb/c mouse model. This study also evaluated the possible mechanism of action directed by this candidate. We found a Th1 immune response after immunization using an Ld-ODC DNA vaccine, with results based on the rearrangement of TCR-V-α-2, proliferation of Carboxy fluorescein Succinimidyle ester positive T cells, which were able to produce cytokines such as TNF-α, IFN-γ, IL-12 and IL-2, but not IL-4, IL-5, IL-6 and IL-10, and modulations of the STAT-1 and p38 MAP kinase signaling pathways.