Leishmaniasis is a wide-spectrum disease caused by parasites from Leishmania genus. A well-modulated immune response that established after the long-lasting clinical cure of leishmaniasis can represent standard requirement for vaccine. Previous studies demonstrated (Viannia) naiffi causes benign and its antigens induce responses in vitro. In this work we aimed to identify immunodominant protein...

OBJECTIVE The aim of this study was to carry out experiments further to our previous new formulation to modify the Leishmania major antigen that had satisfactory results previously. METHODS In this study we made a preliminary, new vaccine with the same methodology and selected two injection doses (100&200 μg/o.1 mL), three injection Groups: Leishmania plus BCG (LB), Leishmania plus new adjuva...

Leishmania major is the major cause of cutaneous leishmaniosis (CL) outside of the Americas. In the present study we have cloned six Leishmania genes (H2A, H2B, H3, H4, A2 and HSP70) into the eukaryotic expression vector pCMVβ-m2a, resulting in pCMV-HISA70m2A, which encodes all six pathoantigenic proteins as a single polyprotein. This expression plasmid has been evaluated as a novel vaccine can...

Leishmania amazonensis parasites cause progressive disease in most inbred mouse strains and are associated with the development of diffuse cutaneous leishmaniasis in humans. The poor activation of an effective cellular response is correlated with the ability of these parasites to infect mononuclear phagocytic cells without triggering their activation or actively suppressing innate responses of ...

Lupoid leishmaniasis, a clinical form of cutaneous leishmaniasis, was described by Christopherson in 1923 [1]. It is a chronic condition that typically follows acute cutaneous leishmaniasis infection. In this clinical form, 1 to 2 years after healing of the acute lesion, new papules and nodules appear at the margin of the remaining scar. The papules have a granulomatous, lupoid appearance and a...

background: leishmania major lmsti1 is a conserved protein among different species of leishmania, and expressed in both amastigote and promastigote forms of l. major life cycle. it has previously been expressed in bacterial systems. m aterials and methods: to express lmsti1 in the methylotrophic yeast         pichia pastoris ( p. pastoris ), the shuttle vector ppicza containing gene lmsti1 was ...

Mice immunized with a glucan-killed parasite vaccine exhibited enhanced resistance to Leishmania donovani infection as evidenced by decreased hepatic parasite burdens when compared to unvaccinated controls. This resistance was not seen in mice immunized with killed parasites alone. Glucan vaccination resulted in increased resistance at day 6, but this effect was no longer present by day 20 of t...

background: leishmaniasis represents a major public health concern in tropical and sub-tropical countries. at present, there is no efficacious vaccine against the disease and new control methods are needed. one way to access this important goal is to knock out genes of specific macromolecules to evaluate the effect of deletion on the growth, multiplication, pathogenesis and immunity of the para...