Abstract
Leukotrienes (LTs) and prostaglandines (PGs) regulate the immune response in infections and other pathologies. In last years, we have contributed for the understanding of the role of LTs and PGs in infections and vaccinal processes. We have shown that LTs are essential for defense mechanisms in histoplasmosis, tuberculosis, and strongyloidiasis, acting as adjuvants and recruiting effector cells. However, these mediators favor infections in trypanosomiasis and candidiasis. Referring to PGs, we have shown that these contribute for pathogenesis of histoplasmosis and strongyloidiasis. Knowing that LTs and PGs are unstable, we have developed a methodology of encapsulation in biocompatible polymers, and we have shown that this process preserves their biological activities, thus representing a new strategy for therapeutic intervention. In this project, formed by 09 subprojects, we will proceed the studies on LTs and PGs in the regulation of innate or induced immune response and the use of these mediators in therapies. In this context, our objectives are (a) to investigate the role of LTs and PGs in the effector mechanisms of macrophages infected by Cronobacter sakazakii; (b) to determine the relationship among lipidic mediators and (b1) infectivity/pathogenicity of strains of Mycobacterium tuberculosis isolated from patients with different clinical forms of the disease, (b2) susceptibility and resistance in the infection by Histoplasma capsulatum, (b3) different methods of vaccination ("prime-booster", gene transfection by electroporation or bioballistics); (c) to develop formulations containing lipidic mediators or their inhibitors associated or not to antigens as vaccinal or therapeutic strategies. Our studies shall widen the understanding on effector mechanisms of immune response that are regulated by LTs and PGs, contribute for development of new therapeutic strategies, form human resources in multidisciplinary areas, and set new methodologies in the College of Pharmaceutical Science of Ribeirão Preto. (AU)
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