Visceral leishmaniasis caused by Leishmania (Leishmania) amazonensis associated with Hodgkin's lymphoma.

Visceral leishmaniasis (VL) is mainly caused by Leishmania (Leishmania) donovani and Leishmania (L.) infantum; however, other Leishmania species have been associated with VL. We report a case of a patient simultaneously diagnosed with VL caused by Leishmania (L.) amazonensis and Hodgkin's lymphoma. After treatment with liposomal amphotericin B and chemotherapy, the patient presented a clinical cure. This case report reinforces the hypothesis that other Leishmania species can cause visceral lesions mainly related to immunosuppression.

Visceral leishmaniasis caused by Leishmania (Leishmania) amazonensis associated with Hodgkin's lymphoma

ABSTRACT Visceral leishmaniasis (VL) is mainly caused by Leishmania (Leishmania) donovani and Leishmania (L.) infantum; however, other Leishmania species have been associated with VL. We report a case of a patient simultaneously diagnosed with VL caused by Leishmania (L.) amazonensis and Hodgkin's lymphoma. After treatment with liposomal amphotericin B and chemotherapy, the patient presented a clinical cure. This case report reinforces the hypothesis that other Leishmania species can cause visceral lesions mainly related to immunosuppression.

Tripla infecção com HTLV-1, leishmaniose visceral e estrongiloidíase complicada por pancreatite aguda / Triple infection with HTLV-1, visceral leishmaniasis and strongyloidiasis complicated by acute pancreatitis

lntrodução: a estrongiloidíase tem grande importância médica devido à capacidade de o Strongyloides stercoralis completar seu ciclo de vida no homem e gerar a síndrome de hiperinfecção principalmente em imunocomprometidos. Devido à dificuldade em estruturar a resposta Th2, os pacientes infectados com o Vírus Linfotrópico de Células T Humanas Tipo 1 (HTLV-1) têm maior tendência a apresentar infecção maciça. A leishmaniose visceral, doença relevante em países em desenvolvimento, causa alterações imunológicas semelhantes, porém há poucos relatos de suscetibilidade específica ao Strongyloides stercoralis nos infectados por Leishmania sp. O presente trabalho tem objetivo de relatar um caso de coinfecção HTLV e calazar, que apresentou-se como pancreatite aguda e enteropatia perdedora de proteínas secundárias à estrongiloidíase maciça. Relato de caso: trata-se de um paciente de 34 anos com história de leishmaniose prévia que deu entrada no nosso Serviço com pancreatite aguda idiopática leve, além de história de diarreia crônica há um ano com anasarca e hipoalbuminemia associadas. Apresentou endoscopia digestiva alta com atrofia duodenal importante, tendo sido identificados Strongyloides stercoralis em biópsia, além de sorologia para HTLV positiva. Apresentou translocação bacteriana com sepse grave de foco abdominal, após início do tratamento com ivermectina, tendo posteriormente evoluído com melhora clínica importante e remissão dos sintomas. Fez investigação com punção de medula óssea, em que foram identificadas as formas amastigotas da leishmania. Discussão e conclusão: a presença de HLTV é um fator de risco para a síndrome de hiperinfecção por Strongyloides stercoralis, tendo predisposto o paciente às manifestações graves e raras descritas. A identificação de leishmania na medula óssea, entretanto, é um fator de risco ainda pouco conhecido para estrongiloidíase disseminada, porém com plausibilidade biológica por afetar o sistema imunológico do hospedeiro.(AU)

Introduction: strongyloidiasis has great medical importance because of the ability of the Strongyloides stercoralis to complete its life cycle in man and cause hyperinfection syndrome especially in immunocompromised hosts. Because of the difficulty in triggering The response, Human T-cell lymphotropic virus type 1 (HTLV-1) infected patients has susceptibility for massive infection. Visceral leishmaniasis, a relevant disease in developing countries, causes similar immunological changes, but there are few reports of specific susceptibility to Strongyloides stercoralis on infected by Leishmania sp. This study aimed to report a case of HTLV and kala azar coinfection, presenting as acute pancreatitis and protein losing enteropathy secondary to massive strongyloidiasis. Case report: a 34-year-old patient previously treated for leishmaniasis has presented at our service with idiopathic acute pancreatitis and chronic diarrhea for one year with anasarca and hypoalbuminemia. Upper endoscopy revealed duodenal atrophy in which biopsy identified Strongyloides stercoralis, and HLTV serology was positive. He presented with bacterial translocation and severe sepsis after first dose of ivermectin, but has clinical improvement and remission of symptoms afterwards. Bone marrow aspiration identified amastigote forms of Leishmania. Discussion and Conclusion: the presence of HLTV is a risk factor for Strongyloides stercoralis hyperinfection, and predisposed this patient to the serious and rare events described. The identification of Leishmania in bone marrow, however, is an poorly known risk factor for disseminated strongyloidiasis, but with biological plausibility because it affects the immune system of the host.(AU)

Effects of nitro-heterocyclic derivatives against Leishmania (Leishmania) infantum promastigotes and intracellular amastigotes

Leishmaniasis is an overlooked tropical disease affecting approximately 1 million people in several countries. Clinical manifestation depends on the interaction between Leishmania and the host's immune response. Currently available treatment options for leishmaniasis are limited and induce severe side effects. In this research, we tested nitro-heterocyclic compounds (BSF series) as a new alternative against Leishmania. Its activity was measured in Leishmania (Leishmania) infantum promastigotes and intracellular amastigotes using MTT colorimetric assay. Additionally, we assessed the phosphatidylserine exposure by promastigotes, measured by flow cytometry, as well as nitric oxide production, measured by Griess' method. The nitro-heterocyclic compounds (BSF series) showed activity against L. (L.) infantum promastigotes, inducting the phosphatidylserine exposition by promastigotes, decreasing intracellular amastigotes and increasing oxide nitric production. The selectivity index was more prominent to Leishmania than to macrophages. Compared to amphotericin b, our compounds presented higher IC50, however the selectivity index was more specific to parasite than to amphotericin b. In conclusion, these nitro-heterocyclic compounds showed to be promising as an anti-Leishmania drug, in in vitro studies

Effects of nitro-heterocyclic derivatives against Leishmania (Leishmania) infantum promastigotes and intracellular amastigotes.

Leishmaniasis is an overlooked tropical disease affecting approximately 1 million people in several countries. Clinical manifestation depends on the interaction between Leishmania and the host's immune response. Currently available treatment options for leishmaniasis are limited and induce severe side effects. In this research, we tested nitro-heterocyclic compounds (BSF series) as a new alternative against Leishmania. Its activity was measured in Leishmania (Leishmania) infantum promastigotes and intracellular amastigotes using MTT colorimetric assay. Additionally, we assessed the phosphatidylserine exposure by promastigotes, measured by flow cytometry, as well as nitric oxide production, measured by Griess' method. The nitro-heterocyclic compounds (BSF series) showed activity against L. (L.) infantum promastigotes, inducting the phosphatidylserine exposition by promastigotes, decreasing intracellular amastigotes and increasing oxide nitric production. The selectivity index was more prominent to Leishmania than to macrophages. Compared to amphotericin b, our compounds presented higher IC50, however the selectivity index was more specific to parasite than to amphotericin b. In conclusion, these nitro-heterocyclic compounds showed to be promising as an anti-Leishmania drug, in in vitro studies.

Air pollution and antibodies against modified lipoproteins are associated with atherosclerosis and vascular remodeling in hyperlipemic mice.

We analyzed the impact of chronic exposure to urban air pollution on the development of atherosclerosis. Hyperlipemic mice (LDLR(-/-)) were submitted to a high fat diet and air pollution for four months. We measured the susceptibility of LDL to oxidative modifications (TBARS), the presence of anti-oxLDL and an apoB-derived peptide (apoB-D) in blood and the degree of atherosclerosis in the aortic arch. Air pollution increased the susceptibility of LDL to oxidation as well as anti-oxLDL and anti-apo-B levels. These levels were even higher than in mice submitted to a high fat diet and non-polluted air. The lipid content of the atherosclerotic plaques in the aorta was increased in groups with a high cholesterol diet independently of the air quality. However, the thickness of the arterial wall was greater in mice fed a high lipid diet with polluted air. Thus, we conclude that urban air pollution exacerbates the susceptibility of LDL to oxidation, atherogenesis and vascular remodeling in hyperlipemic mice and that an immune response accompanies this process.

Efeito aterogênico da poluição atmosférica: associação aos anticorpos anti LDLox e anti peptídeo D da apoB e aos aspectos morfométricos e inflamatórios / Aterogenic effect of air pollution: association to anti-oxLDL and anti peptide D-ApoB and in aspects morphometric and inflamatory

O objetivo deste estudo foi identificar genes diferencialmente expressos entre adenocarcinoma de pâncreas de pacientes com e sem diabetes melito, utilizando microarranjos de oligonucleotídeos hibridizados com cRNA de tumores advindos de pacientes nessas duas condições. Observou-se nos microarranjos que 293 genes estavam pelo menos duas vezes mais expressos nos tumores dos pacientes com diabetes melito. Outros 297 genes estavam mais expressos nos tumores dos não-diabéticos...

The objective of the present study was to identify differentially expressed genes between pancreatic adenocarcinoma from patients who had and who did not have diabetes mellitus. Oligonucleotides bioarrays were hybridized with complementary RNA from tumors of two diabetic and two normotolerant patients. It was observed that 293 genes were at least twice more expressed in tumors from diabetic patients. Other 297 genes were more expressed in tumors from normotolerant patients. In quantitative RT-PCR performed in 12 tumors samples, FAM3D mRNA was more expressed in tumors from diabetic than in tumors from non-diabetic patients...

Acute cardiopulmonary alterations induced by fine particulate matter of São Paulo, Brazil.

The mechanisms involved in the association between air pollution and increased cardiovascular morbidity are not fully understood. The objective of this study was to test the hypothesis that fine particulate matter (PM(2.5)) induces systemic inflammation and vasoconstriction of small arteries in the lung and heart of rats. Thirty-eight healthy Wistar rats were anesthetized, intubated, and submitted to the instillation of 1 ml of distilled water diluted in the following solution: blank filter, 100 microg and 500 microg of PM(2.5). PM(2.5) was collected in glass fiber filters with a high-volume sampler. The animals were sacrificed 24 h after instillation when blood, heart, and lung samples were collected for morphological and wet-to-dry weight ratio analysis. PM(2.5) consisted of the following elements: sulphur, arsenic, bromine, chlorine, cobalt, iron, lanthanum, manganese, antimony, scandium, and thorium. Total reticulocytes significantly increased at both PM(2.5) doses (p < 0.05) while hematocrit levels increased in the 500 microg group (p < 0.05). Quantification of segmented neutrophils and fibrinogen levels showed a significant decrease, while lymphocytes counting increased with 100 microg of PM(2.5) (p < 0.05). A significant dose-dependent decrease of intra-acinar pulmonary arteriole lumen/wall ratio (L/W) was observed in PM groups (p < 0.001). Peribronchiolar arterioles L/W showed a significant decrease in the 500 microg group (p < 0.001). A significant increase in heart wet-to-dry weight ratio was observed in the 500 microg group (p < 0.001). In conclusion, fine environment particles in the city of São Paulo promote pulmonary and cardiac histological alterations. Pulmonary vasculature was markedly affected by particle instillation, resulting in significant vasoconstriction in healthy rats.

Efeito de emulsoes lipidicas sobre mecanismos de defesa organica na agressao infecciosa / Effect of lipidic emulsions on organic defense mechanisms in infective aggression

Constitui-se o objetivo da presente pesquisa o estudo do efeito de emulsoes lipidicas comercialmente disponiveis de Triglicerides de Cadeia Longa (TCL) e de Triglicerides de Cadeia Media (TCM) e Longa (TCM/TCL) a 10 por cento sobre a funcao de polimorfonucleares (LPMN) de sangue de ratos apos transfusao endovenosa continua em ratos submetidos a agressao infecciosa por meio da inoculacao intraperitoneal de E. coli. Efetuaram-se provas de funcao dos LPMN (atividades fagocitaria, bactericida e quimiotatica), hemoculturas seriadas, avaliacao clinica, autopsia e avaliacao histopatologica do figado e baco e analise de taxa de mortalidade. Nao se observaram diferencas significativas no comportamento funcional dos LPMN do sangue de ratos