Abstract Leishmaniasis is a zoonotic disease caused by over 20 species of protozoan parasites the genus Leishmania. Infection commonly spread sandflies and produces wide spectrum clinical signs symptoms. Therefore, from an epidemiological therapeutic standpoint, it important to detect differentiate Leishmania spp. The objective this study was combinate in silico vitro strategies evaluate analyt...

Innate immunity is the first line of defense against invading microorganisms. Trypanosome Lytic Factor (TLF) is a minor sub-fraction of human high-density lipoprotein that provides innate immunity by completely protecting humans from infection by most species of African trypanosomes, which belong to the Kinetoplastida order. Herein, we demonstrate the broader protective effects of human TLF, wh...

following an epidemiological survey of zoonotic cutaneous leishmaniosis (zcl) in some villages of badrood, a rural district north of the city of natanz, central iran, phlebotomus (phlebotomus ) papatasi scopoli were found to be naturally infected with leishmania (leishmania) major zymodeme mon-26. sandflies were collected and dissected biweekly from rodent burrows during sandfly season, april- ...

Cytokines play a critical role in shaping the host immune response to Leishmania infection and directing the development of protective and non-protective immunities during infection. Cytokines exert their biological activities through the activation and translocation of transcription factors into the nucleus whether they drive the expression of specific cytokine-responsive genes. Signal transdu...

The effects of infection of mice with Leishmania major on liver microsomal protein and cytochrome P-450 were examined. The levels of hepatic microsomal protein and cytochrome P-450 were monitored at 6, 7, 9 and 12 weeks post-infection. The results indicated that the amount of hepatic microsomal protein and cytochrome P-450 were unchanged throughout the course of infection with L. major, despite...

BACKGROUND Leishmania preferentially infects macrophages, which allow the parasite to multiply but can also kill the parasite. Although the T cell response in human leishmaniasis is well-characterized, little is known about the concomitant macrophage behavior. The aim of this study was to characterize the macrophage immune response after Leishmania braziliensis infection in cells derived from c...

Human cutaneous leishmaniasis (CL) caused by Leishmania braziliensis, presents an exaggerated Th1 response that is associated with ulcer development. Macrophages are the primary cells infected by Leishmania parasites and both reactive oxygen species (ROS) and nitric oxide (NO) are important in the control of Leishmania by these cells. The mechanism involved in the killing of L. braziliensis is ...

BACKGROUND The immunization with genetically attenuated Leishmania cell lines has been associated to the induction of memory and effector T cell responses against Leishmania able to control subsequent challenges. A Leishmania infantum null mutant for the HSP70-II genes has been described, possessing a non-virulent phenotype. METHODOLOGY/PRINCIPAL FINDINGS The L. infantum attenuated parasites ...

BACKGROUND In vitro studies show that Leishmania infection decreases the adhesion of inflammatory phagocytes to connective tissue by a mechanism dependent on the modulation of integrin function. However, we know little about the influence of this reduction in leukocyte adhesion on parasite dissemination from the infection site. METHODS In this work, we used a model of chronic peritonitis indu...

Three adaptor molecules of the Dok family, Dok-1, Dok-2 and Dok-3 are expressed in macrophages and are involved in the negative regulation of signaling in response to lipopolysaccharide and various cytokines and growth factors. We investigated the role and the fate of these proteins following infection with Leishmania major promastigotes in macrophages. The protozoan parasite L. major causes cu...