EDITE HATSUMI YAMASHIRO KANASHIRO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Moléstias Infecciosas e Parasitárias, Faculdade de Medicina
LIM/48 - Laboratório de Imunologia, Hospital das Clínicas, Faculdade de Medicina
LIM/48 - Laboratório de Imunologia, Hospital das Clínicas, Faculdade de Medicina
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- In vitro miltefosine and amphotericin B susceptibility of strains and clinical isolates of Leishmania species endemic in Brazil that cause tegumentary leishmaniasis(2023) FERREIRA, Bianca A.; COSER, Elizabeth M.; SABORITO, Cristiele; YAMASHIRO-KANASHIRO, Edite H.; COELHO, Adriano C.; LINDOSE, Jose Angelo L.Tegumentary leishmaniasis encompasses a spectrum of clinical manifestations caused by the parasitic protozoa of the genus Leishmania. In Brazil, there are at least seven Leishmania species that are endemic and responsible for this set of clinical manifestations of the disease. Current treatment is limited to a restricted number of drugs that in general have several drawbacks including parenteral use, toxicity, and severe side effects. Amphotericin B is considered a second-line drug for tegumentary leishmaniasis in Brazil, while miltefosine was recently approved for clinical use in the treatment of this disease. In this study, we investigated the in vitro susceptibility of Leishmania strains representative of the species endemic to Brazil, as well as a panel of thirteen clinical isolates of tegumentary leishmaniasis, to both amphotericin B and miltefosine. A moderate variation in the susceptibility to both drugs was found, where the EC50 values varied from 11.43 to 52.67 mu M for miltefosine and from 12.89 to 62.36 nM for amphotericin B in promastigotes, while for the intracellular amastigotes, values ranged from 1.08 to 9.60 mu M and from 1.69 to 22.71 nM for miltefosine and amphotericin B respectively. Furthermore, the clinical isolates and strains of the subgenus Viannia were evaluated for the presence of Leishmania RNA virus 1 (LRV1), as this is an important factor associated with disease severity and treatment outcome. These findings provide a preclinical dataset of the activity of these drugs against the causative species of tegumentary leishmaniasis in Brazil.
article 8 Citação(ões) na Scopus Leptospirosis Infection in Sheep and Characterization of the Renal Inflammatory Response.(2011) CARVALHO, Sonia Maria de; GONCALVES, Larissa Maria Feitosa; MACEDO, Nicodemos Alves de; GOTO, Hiro; SILVA, Silvana Maria Medeiros de Sousa; MINEIRO, Ana Lys Bezerra Barradas; KANASHIRO, Edite Hatsumi Yamashiro; COSTA, Francisco Assis LimaCarvalho S.M., Gon alves L.M.F., Macedo N.A., Goto H., Silva S.M.M.S., Mineiro A.L.B.B., Kanashiro E.H.Y. & Costa F.A.L. 2011. [Leptospirosis Infection in Sheep and Characterization of the Renal Inflammatory Response.] Infeccao por leptospiras em ovinos e caracterizacao da resposta inflamatoria renal. Pesquisa Veterinaria Brasileira 31(8):637-642. Departamento de Clinica e Cirurgia Veterinaria, Centro de Ciencias Agrarias, Universidade Federal do Piaui, Campus Socopo, Teresina, PI 64046-550, Brazil. E-mail: fassisle@gmail.com Lepitospirosis is a serious worldwide distribution disease which affects man and other animals. The infection is generally asymptomatic in animals. In cases whose symptoms are present, symptoms are similar to other infections. In the present study serum samples from 119 sheep and their kidneys were collected during their slaughter in outdoor markets in the city of Teresina, Piaui, Brazil. The Microscopic Agglutination Test (MAT) obtained 34 positive serological samples for one or more Leptospira spp. serovar with occurrence rate of 28.6% of leptospiral antibodies. There were 23 cases of infection for a single serovar, and 11 cases with coagglutination for two or more serovars. Autumnalis had the highest occurrence (29.4%) among the pathogenic serovars. The histopathological analysis of 36 kidney fragments revealed tubulo-interstitial alterations in 33 (91.7%) positive animals. Tubular lesions were observed in 20 (55.5%) positive animals. The Warthin Starry staning revealed the presence of Leptospira in 8 (22.20%) of the 36 positive samples. The immunoperoxidase staining revealed the presence of Leptospira in 12 (60%) of 20 positive samples. The inflammatory infiltrate in the positive animals was significantly more evident in the cortical-medullar and cortical regions than in the medullar region (p=0.000), however, there was no difference between positive and negative animals. The presence of hyaline casts in the proximal tubules was significantly higher in positive animals compared to the negative ones (p=0.0001). Discrete lesion was observed in glomeruli. In conclusion, the results from this study showed that sheep which are positive for Leptospira present tubulo-intersticial renal lesions with the presence of Leptospira in the tubules, conferring to these animals the condition of asymptomatic carriers.- Specific label-free and real-time detection of oxidized low density lipoprotein (oxLDL) using an immunosensor with three monoclonal antibodies(2014) CABRAL-MIRANDA, Gustavo; YAMASHIRO-KANASHIRO, E. H. G.; GIDLUND, Magnus; SALES, M. Goreti F.Increased levels of plasma oxLDL, which is the oxidized fraction of Low Density Lipoprotein (LDL), are associated with atherosclerosis, an inflammatory disease, and the subsequent development of severe cardiovascular diseases that are today a major cause of death in modern countries. It is therefore important to find a reliable and fast assay to determine oxLDL in serum. A new immunosensor employing three monoclonal antibodies (mAbs) against oxLDL is proposed in this work as a quick and effective way to monitor oxLDL. The oxLDL was first employed to produce anti-oxLDL monoclonal antibodies by hybridoma cells that were previously obtained. The immunosensor was set-up by self-assembling cysteamine (Cyst) on a gold (Au) layer (4 mm diameter) of a disposable screen-printed electrode. Three mAbs were allowed to react with N-hydroxysuccinimide (NHS) and ethyl(dimethylaminopropyl) carbodiimide (EDAC), and subsequently incubated in the Au/Cys. Albumin from bovine serum (BSA) was immobilized further to ensure that other molecules apart from oxLDL could not bind to the electrode surface. All steps were followed by various characterization techniques such as electrochemical impedance spectroscopy (EIS) and square wave voltammetry (SWV). The analytical operation of the immunosensor was obtained by incubating the sensing layer of the device in oxLDL for 15 minutes, prior to EIS and SWV. This was done by using standard oxLDL solutions prepared in foetal calf serum, in order to simulate patient's plasma with circulating oxLDL. A sensitive response was observed from 0.5 to 18.0 mu g mL(-1). The device was successfully applied to determine the oxLDL fraction in real serum, without prior dilution or necessary chemical treatment. The use of multiple monoclonal antibodies on a biosensing platform seemed to be a successful approach to produce a specific response towards a complex multi-analyte target, correlating well with the level of oxLDL within atherosclerosis disease, in a simple, fast and cheap way.
- Assessment of biomarkers and clinical parameters as predictors of survival in patients with chagasic heart failure(2023) BOCCHI, Edimar Alcides; GUIMARAES, Guilherme Veiga; ROMERO, Cristhian Espinoza; SATO, Paula Keiko; FREITAS, Vera Lucia Teixeira de; KANASHIRO, Edite Hatsumi Yamashiro; FURUCHO, Celia Regina; CRUZ, Fatima Das Dores; NAKANISHI, Erika Shimoda; BUSSER, Felipe Delatorre; BEZERRA, Rita Cristina; WESTPHALEN, Elizabeth Visone Nunes; ROCHA, Mussya Cisotto; YASUDA, Maria Aparecida ShikanaiBackground Chagas disease, endemic in Latin America and spreading globally due to emigration, has a significant health burden, particularly in relation to chagasic heart failure (HF). Chagasic cardiomyopathy (CCM) is characterized by chronic inflammatory myocardial disease. This study aimed to identify inflammatory parameters and biomarkers that could aid in the management of patients with chagasic HF. Methods and findings A cohort study was conducted at a tertiary cardiology single-center over a mean follow-up period of 2.4 years. The study included patients with HF secondary to CCM enrolled between October 2013 and July 2017. Various clinical parameters, echocardiography findings, parasitemia status, brain natriuretic peptide (BNP) and troponin T (TnT) levels, and inflammatory biomarkers (IL-6, IL-10, IL-12p70, IL-17A, adiponectin, and IFN-gamma) were assessed. The study encompassed a cohort of 103 patients, with a median age of 53 years and 70% being male. The left ventricular ejection fraction (LVEF) was 28%, with 40% of patients classified as NYHA II functional class. The median BNP level was 291 pg/ml. The observed mortality rate during the study period was 38.8%. Predictors of lower survival were identified as elevated levels of BNP, TnT, reduced LVEF, and increased adiponectin (thresholds: BNP > 309 pg/ml, TnT > 27.5 ng/ml, LVEF < 25.5%, adiponectin > 38 mu g/mL). Notably, there was no evidence indicating a relationship between parasitemia and the inflammatory parameters with lower survival in these patients, including INF-gamma, IL-6, IL-10, IL12-(p70), and IL17a. Conclusion Despite the presence of a chronic inflammatory process, the evaluated inflammatory biomarkers in this cohort were not predictive of survival in patients with chagasic HF with reduced ejection fraction (HFrEF). However, reduced LVEF, elevated BNP, adiponectin levels, and troponin T were identified as predictors of lower survival in these patients.