RESUMO
Abstract The present study was aimed to identify the underlying mechanisms of improper renal function in Leishmania donovani infection that causes VL. Mice (BALB/c) were infected with L. donovani and different parameters for proteinuria were assessed. The levels of superoxide anion (O2 -), hydrogen peroxide (H2O2), lipid peroxidation (MDA), inflammatory cytokines, and toll-like receptor (TLR) 2 and 4 expression were found significantly elevated at 60th day in these animals and declined at 90th day post infection. However, TGF-β and caspase 3 activities were higher at 90th day in comparison to 60th day post infection. These findings suggested that exacerbated inflammatory conditions correlate with abnormal renal functions in L. donovani infection, which is further augmented by activated TLRs expressions by circulating leishmanial antigens. Further, the increased levels of TGF-β and caspase 3 at 90th day suggested TGF-β mediated apoptotic cell death of renal and other cells during later stages of disease that may eventually result in release of host and parasitic factors in urine during visceral leishmaniasis.
Assuntos
Animais , Feminino , Ratos , Fator de Crescimento Transformador beta/sangue , Receptor 2 Toll-Like/sangue , Receptor 4 Toll-Like/sangue , Rim/parasitologia , Rim/patologia , Leishmaniose Visceral/patologia , Leishmania donovani , Apoptose , Modelos Animais de Doenças , Leishmaniose Visceral/sangue , Camundongos Endogâmicos BALB CRESUMO
Toll-like receptors (TLRs) are pattern-recognition receptors that are important in innate immune responses to bacterial infection. The purpose of this study is to describe the prevalence of TLRs genetic variations in the bacteremic patients in Korea. A total of 154 patients with bacteremia and 179 healthy volunteers were included. The Asp299Gly and Thr399Ile allele of the TLR4 gene and Arg753Gln and Arg677Trp allele of the TLR2 gene were tested by PCR-RFLP. The DNA sequences were determined to confirm the PCR-RFLP results. Contrary to the expectation, no genetic polymorphisms were detected in both groups of this study, suggesting that it is very rare in Korean.
Assuntos
Pessoa de Meia-Idade , Masculino , Humanos , Feminino , Receptor 4 Toll-Like/sangue , Receptor 2 Toll-Like/sangue , Fatores de Risco , Medição de Risco/métodos , Prevalência , Polimorfismo de Nucleotídeo Único/genética , Coreia (Geográfico)/epidemiologia , Testes Genéticos/métodos , Predisposição Genética para Doença/epidemiologia , Análise Mutacional de DNA , Biomarcadores/sangue , Bacteriemia/sangueRESUMO
Toll-like receptors (TLRs) are pattern-recognition receptors that are important in innate immune responses to bacterial infection. The purpose of this study is to describe the prevalence of TLRs genetic variations in the bacteremic patients in Korea. A total of 154 patients with bacteremia and 179 healthy volunteers were included. The Asp299Gly and Thr399Ile allele of the TLR4 gene and Arg753Gln and Arg677Trp allele of the TLR2 gene were tested by PCR-RFLP. The DNA sequences were determined to confirm the PCR-RFLP results. Contrary to the expectation, no genetic polymorphisms were detected in both groups of this study, suggesting that it is very rare in Korean.