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Critical analysis of molluscicide application in schistosomiasis control programs in Brazil

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Infectious Diseases of Poverty 2016年第1期5卷 485-490页

作者： PMZ Coelho RL Caldeira Research group of Schistosoma mansoni Biology and Its Interaction with the Host RenéRachou InstituteOswaldo Cruz Foundation-Minas Gerais30190-002 Belo HorizonteMGBrazil Research group of Medical Helminthology and Malacology RenéRachou InstituteOswaldo Cruz Foundation-Minas Gerais30190-002 Belo HorizonteMGBrazil

In Brazil,Biomphalaria glabrata,***,and *** are naturally infected by the trematode Schistosoma mansoni,the causative agent of *** decades of governmental efforts through official control programs,schistosomiasis remains an important public health problem in the country:thousands of people are infected with the trematode each year and millions live in endemic *** World Health Organization recommends using a combination of molluscicide(niclosamide)and mass chemotherapy to control the transmission of schistosomiasis,with this treatment successfully reducing the morbidity of the *** the past,niclosamide has been used in official schistosomiasis control programs in ***,as *** recolonizes even after molluscicide application,the use of molluscicides has gradually decreased in the country until they were discontinued in 2002,mainly due to the rising global pressure to preserve the environment and the difficulties of obtaining licenses from the Brazilian Ministry of Environment to use toxic substances in aquatic ***,the discovery of new molluscicides,which could be more selective to Biomphalaria species and less harmful to the aquatic ecosystem,is *** addition,political efforts to sensitize funders to provide grants for this field of research are *** this context,this article aims to make a critical analysis of molluscicide application in schistosomiasis control programs in Brazil.

关键词： Biomphalaria Molluscicide Schistosoma mansoni Schistosomiasis Vector control Braz

Unlocking the in vitro anti-Trypanosoma cruzi activity of halophyte plants from the southern Portugal

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Asian Pacific Journal of Tropical Medicine 2016年第8期9卷 714-719页

作者： Marta Oliveira Policarpo Ademar Sales Junior Maria Joao Rodrigues Marina DellaGreca Luisa Barreira Silvane Maria Fonseca Murta Alvaro Jose Romanha Luisa Custodio Center of Marine Sciences (CCMAR) University of AlgarveCampus de Gambelas 8005-139 FaroPortugal Centro de Pesquisas Rene rachou FIOCRUZ Belo HorizonteMinas GeraisBrazil Dipartimento di Chimica Organica e Biochimica Universita` Federico Ⅱ Complesso Universitario Monte Sant'AngeloVia Cintia 4I-80126NapoliItaly

Objective:To evaluate the in vitro anti-Trypanosoma cruzi（***） activity of organic extracts prepared from halophyte species collected in the southern coast of Portugal（Algarve）,and chemically characterize the most active ***:Acetone,dichloromethane and methanol extracts were prepared from 31 halophyte species and tested in vitro against trypomastigotes and intracellular amastigotes of the Tulahuen strain of *** most active extract was fractionated by preparative HPLC-DAD,affording 11 *** most selective fraction was fully characterized by ***:From 94 samples tested,one was active,namely the root dichloromethane extract of Juncus acutus(IC50 < 20 μg/mL).This extract was fractionated by HPLC,affording 11 fractions,one of them containing only a pure compound（juncunol）,and tested for anti-parasitic *** 8(IC50 = 4.1 μg/mL) was the most active,and was further characterized by *** major compounds were phenanthrenes,9,10-dihydrophenanthrenes and ***:Our results suggest that the compounds identified in fraction 8 are likely responsible for the observed anti parasitic *** research is in progress aiming to isolate and identify the specific active *** the best of our knowledge,this is the first report on the in vitro anti *** activity of halophyte species.

关键词： Chagas disease Halophytes Trypanosoma cruzi Phenanthrenes Juncunol

The full length <i>PtSRP</i>(<i>Pisolithus tinctorius</i>symbiosis related protein) fungal mRNA encodes a potential marker of ectomycorrhiza formation

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American Journal of Molecular Biology 2012年第3期2卷 258-264页

作者： Helder Elísio E. Vieira Cláudia E. P. Lima Carlos E. Calzavara-Silva Bartolomeu Acioli-Santos Elaine Malosso Departamento de Micologia Universidade Federal de Pernambuco Recife Brazil Laboratório de Imunologia Celular e Molecular Centro de Pesquisas René Rachou Belo Horizonte Brazil

The Pisolithus tinctorius symbiosis related protein expressed sequence tag (EST PtSRP) was previously identified in the first hours of the interaction between the fungus Pisolithus tinctorius and sweet chestnut Castanea sativa, and partially characterized as a fungal marker gene of ectomycorrhizal symbiosis formation. We used the 5’ rapid amplification of cDNA ends (RACE) to obtain the PtSRP mRNA 5’ region, and together with our previously reported 3’ mRNA region, the full mRNA sequence was assembled by use of bioinformatics tools and deposited to GenBank (Accession: GU733439). The full-length mRNA sequence (636 bp) revealed the locations of the 5’ and 3’ untranslated regions (UTRs) and contained the Kozak sequence (ccc aag ATG A) in the 5’ UTR. The in silico translated PtSRP open reading frame (ORF) codes for a 127 amino acid protein and contained four putative post-translational modification sites (two N-glycosylation and two phosphorylation). The protein secondary structure is postulated to be composed of one N-terminal hydrophobic transmembrane alpha helix and at least six hydrophilic beta-strands spread across the protein. Sub-cellular localization prediction suggests that the protein is involved in cellular secretory pathway, supported by the presence of a cleavage site motif close to the membrane anchor. The data presented herein indicate the role of PtSRP as a fungal membrane secreted protein involved in early stages of ectomycorrhizal formation, with application as a possible marker for nascent ectomy-corrhiza fungal development.

关键词： Ectomycorrhiza Symbiosis Related Genes/Proteins RACE EST

CXCL9 and CXCL10 display an agedependent profile in Chagas patients:a cohort study of aging in Bambui,Brazil

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Infectious Diseases of Poverty 2020年第3期9卷 132-132页

作者： Fernanda Fortes de Araújo Karen Cecília Lima Torres Sérgio Viana Peixoto Antonio Luiz Pinho Ribeiro Juliana Vaz Melo Mambrini Vitor Bortolo Rezende Maria Luiza Lima Silva Antônio Ignácio Loyola Filho Andréa Teixeira-Carvalho Maria Fernanda Lima-Costa Olindo Assis Martins-Filho Integrated Research Group in Biomarkers Rene Rachou InstituteOswaldo Cruz FoundationAvenida Augusto de Lima1715–Barro Preto–Belo HorizonteMinas Gerais 30190-002Brazil 不详

Background:Chagas disease is endemic in Latin America and still represents an important public health problem in the *** cardiomyopathy is the most significant chronic form due to its association with morbidity and *** last decade has seen increasing evidence that inflammatory cytokines and chemokines are responsible for the generation of inflammatory infiltrate and tissue damage,with chronic chagasic cardiomyopathy patients presenting a pro-inflammatory immune *** studies have evaluated the role of chemokines in experimental *** infection,few have addressed their systemic profile,especially for human infection and in aging *** present work aimed to use the data from a large population based study of older adults,conducted in an endemic area for Chagas disease,to examine the association between serum levels of cytokines and chemokines,*** infection and electrocardiogram(ECG)***:The present work evaluated serum levels of CCL2,CXCL9,CXCL10,CCL5,CXCL8,IL-1β,IL-6,TNF,IL-12 and IL-10 by Flow Cytometric Bead Array assay(CBA)and the results expressed in pg/*** baseline survey started in January 1st 1997,with 1284 participants of an aged population-based *** signed an informed consent at baseline and at each subsequent visit and authorized death certificate and medical records ***:Our results demonstrated that Chagas disease patients had higher serum levels of CXCL9,CXCL10 and IL-1βand lower serum levels of CCL5 than non-infected ***,our data demonstrated that CXCL9 and CXCL10 increased in an age-dependent profile in Chagas disease ***:Together,this study provided evidences that serum biomarkers increase along the age continuum and may have potential implications for establishing clinical management protocols and therapeutic intervention in Chagas disease patients.

关键词： Chagas disease Immune biomarkers Chemokines Cytokines Cohort

Evaluating seroprevalence to circumsporozoite protein to estimate exposure to three species of Plasmodium in the Brazilian Amazon

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Infectious Diseases of Poverty 2018年第1期7卷 448-459页

作者： Virginia Araujo Pereira Juan Camilo Sanchez-Arcila Mariana Pinheiro Alves Vasconcelos Amanda Ribeiro Ferreira Lorene de Souza Videira Antonio Teva Daiana Perce-da-Silva Maria Teresa Queiroz Marques Luzia Helena de Carvalho Dalma Maria Banic Luiz Cristovao Sobrino Porto Joseli Oliveira-Ferreira Laboratory of Immunoparasitology Oswaldo Cruz Institute/FiocruzAv.Brasil 4365ManguinhosRio de JaneiroBrazil Institute of Infectology Emilio Ribas São PauloSao PauloBrazil Laboratory of Immunodiagnosis Departament of Biological SciencesNational School of Public Health/FiocruzRio de JaneiroBrazil Laboratory of Clinical Immunology Oswaldo Cruz Institute/FiocruzRio de JaneiroBrazil Laboratory of Histocompatibility and Cryopreservation–HLA of DHE/IBRAG/UERJ Rio de JaneiroBrazil Molecular Biology and Malaria Immunology Research Group Centro de Pesquisas Rene Rachou/FiocruzBelo HorizonteMinas GeraisBrazil

Background:Brazil has seen a great decline in malaria and the country is moving towards ***,for eventual elimination,the control program needs efficient tools in order to monitor malaria exposure and *** this study,we aimed to evaluate whether seroprevalence to the circumsporozoite protein(CSP)is a good tool for monitoring the exposure to and/or evaluating the burden and distribution of Plasmodium species in the Brazilian ***:Cross-sectional surveys were conducted in a rural area of Porto Velho,Rondônia *** infection was detected by microscopy and polymerase chain *** to the sporozoite CSP repeats of Plasmodium vivax,***,and ***(PvCS,PfCS,and PmCS)were detected using the enzyme-linked immunosorbent assay *** leukocyte antigen(HLA)-DRB1 and DQB1 genes were typed using Luminex®xMAP®***:The prevalence of immunoglobulin G against *** CSP peptide(62%)was higher than ***(49%)and ***(46%)CSP *** of the studied individuals had antibodies to at least one of the three peptides(72%),34%had antibodies to all three peptides and 28%were *** the majority of the population was not infected at the time of the survey,74.3%of parasite-negative individuals had antibodies to at least one of the ***,among individuals carrying the haplotypes DRB1*04~DQB1*03,there was a significantly higher frequency of PfCS responders,and DRB1*16~DQB1*03 haplotype for PvCS and PfCS *** contrast,HLA-DRB1*01 and HLA-DQB1*05 allelic groups were associated with a lack of antibodies to *** and *** CSP repeats,and the haplotype DRB1*01~DQB1*05 was also associated with non-responders,including non-responders to ***:Our results show that in low transmission settings,naturally acquired antibody responses against the CSP repeats of ***,***,and *** in a single cross-sectional study may n

关键词： Malaria Circumsporozoite protein Serological marker Human leucocyte antigen IgG antibody Porto Velho Rondônia Brazil

Subcutaneous Model for the Study of Dengue Virus Infection in Immune Competent Mice

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Journal of Biosciences and Medicines 2018年第5期6卷 97-110页

作者： Beatriz Senra Santos Natalia Lima Pessoa Natalia Lucinda Gustavo Cardoso de Oliveira Thais Souza Silva Ketyllen Reis Andrade Ketyllen Reis Andrade Bruno Galvã o Filho Marcele Neves Rocha Alexandre Vieira Machado Pedro Augusto Alves É rica Alessandra Rocha Alves Erna Geessien Kroon Marco Antô nio Campos Instituto René rachou Funda&amp amp ccedil & amp atilde o Oswaldo Cruz Fiocruz Belo Horizonte Brazil Departamento de Microbiologia Universidade Federal de Minas Gerais Belo Horizonte Brazil Empresa Brasileira de Pesquisa Agropecuá ria Laborat&amp amp oacute rio de Virologia Brasilia Brazil

Various mouse models to study dengue have been described by different authors, some of them using immunodeficient or some using humanized mice. Our group reported previously a deadly murine model, which used the intracranial inoculum of highly virulent Dengue virus (DENV) in immune competent mouse. Here we present a model of immune competent mouse (C57BL/6), infected subcutaneously by the same highly virulent DENV (DENV3 genotype I). In this immunocompetent systemic mice model, the cytokine levels and hematological parameters such as total and differential leukocyte and platelets counts, together with weight loss, were considered important monitoring parameters, allowing a better understanding of the systemic human disease. Mice were inoculated subcutaneously and evaluated by the percentage weight variation as well as the clinical signs. Hematological parameters and cytokines levels were measured and viral titration in brain tissue or serum neutralization was performed to confirm mice infection. The subcutaneously DENV inoculated mice showed weight loss after infection, but they did not show any other clinical signs. The leukocytes and platelets decreased after subcutaneous inoculation. The cytokines TNF alpha and IFN gamma increased after infection in mice. The subcutaneous model provided scope for improved understanding of the dengue pathogenesis, as well as possible mechanism for protection to subsequent mouse infected by intracranial route in mice. This model could be used to study the vertebrate immune response and evaluation of drugs or vaccine against dengue virus.

关键词： Subcutaneous Murine Model Dengue Disease Immune Competent Mouse Cytokines Innate Immune Response

Functional biomarker signatures of circulating T-cells and its association with distinct clinical status of leprosy patients and their respective household contacts

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Infectious Diseases of Poverty 2020年第6期9卷 5-15页

作者： Pedro Henrique Ferreira Marçal Rafael Silva Gama Lorena Bruna Pereira de Oliveira Olindo Assis Martins-Filho Roberta Olmo Pinheiro Euzenir Nunes Sarno Milton Ozório Moraes Lucia Alves de Oliveira Fraga Universidade Vale do Rio Doce–Univale Governador ValadaresMGBrazil Grupo Integrado de Pesquisas em Biomarcadores Institute Rene RachouFIOCRUZ-MinasBelo HorizonteMGBrazil Laboratorio de Hanseniase Instituto Oswaldo CruzFundagao Oswaldo Cruz-FIOCRUZ-RJRio de JaneiroRJBrazil Nucleo de Pesquisa em Hansenologia Universidade Federal de Juiz de ForaInstituto de Ciencias da VidaCam pus Governador ValadaresRua Sao Paulo582-CentroGovernador ValadaresMG 30190-002Brazil

Background: Leprosy is a chronic infectious disease classified into two subgroups for therapeutic purposes:paucibacillary(PB)and multibacillary(MB),closely related to the host immune *** this context it is noteworthy looking for immunological biomarkers applicable as complementary diagnostic tools as well as a laboratorial strategy to follow-up leprosy household ***:: The cross-sectional study enrolled 49 participants,including 19 patients and 30 healthy *** blood mononuclear cells(PBMC)were isolated and incubated in the presence of Mycobacterium leprae *** cells were prepared for surface(CD4+and CD8+)and intracytoplasmic cytokine staining(IFN-γ,IL-4 and IL-10).Multiple comparisons amongst groups were carried out by ANOVA,Kruskal–Wallis,Student T or Mann–Whitney *** analysis of categorical variables was performed by *** biomarker signature analysis was conducted using the global median values for each biomarker index as the cut-off edge to identify the proportion of subjects with high biomarker ***: The cytokine signature analysis demonstrated that leprosy patients presented a polyfunctional profile of T-cells subsets,with increased frequency of IFN-γ+T-cell subsets along with IL-10+and IL-4+from CD4+T-cells,as compared to health Controls(Venn diagram report).Moreover,statistical analysis was carried out using parametric or non-parametric variance analysis followed by pairwise multiple comparisons,according to the data normality distribution.L(PB)displayed a polyfunctional profile characterized by enhanced percentage of IFN-γ+,IL-10+and IL-4+produced by most T-cell subsets,as compared to L(MB)that presented a more restricted cytokine functional profile mediated by IL-10+and IL-4+T-cells with minor contribution of IFN-γproduced by CD4+*** was that HHC(MB)exhibited enhanced frequency of IFN-γ+T-cells,contrasting with HHC(PB)that presented a cytokine profile limited t

关键词： Leprosy Mycobacterium leprae Cytokines Household contacts

Building a global schistosomiasis alliance:an opportunity to join forces to fight inequality and rural poverty

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Infectious Diseases of Poverty 2017年第1期6卷 558-563页

作者： Lorenzo Savioli Marco Albonico Daniel G.Colley Rodrigo Correa-Oliveira Alan Fenwick Will Green Narcis Kabatereine Achille Kabore Naftale Katz Katharina Klohe Philip TLoVerde David Rollinson JRussell Stothard Louis-Albert Tchuem Tchuente Johannes Waltz Xiao-Nong Zhou Global Schistosomiasis Alliance GenevaSwitzerland Center for Tropical Diseases Sacro Cuore Hospital-WHO Collaborating Centre on strongyloidiasis and other intestinal parasitic infectionsNegrarVeronaItaly Schistosomiasis Consortium for Operational Research and Evaluation The University of GeorgiaAthensGeorgiaUSA Centro de Pesquisas Renerachou-Fiocruz Belo HorizonteBrazil and Universidade Federal de Ouro PretoOuro PretoBrazil Department of Infectious Disease Epidemiology SCIImperial CollegeLondonUK Trinity College Cambridge CambridgeUK Imperial College London LondonUK RTI International WashingtonDCUSA Research Center Rene rachou-Oswaldo Cruz Foundation Belo HorizonteBrazil Global Schistosomiasis Alliance MunichGermany University of Texas Health Science Center San AntonioTXUSA Life Sciences Department The Natural History MuseumLondonUK Department of Parasitology Liverpool School of Tropical MedicineLiverpool L35QAUK Centre for Schistosomiasis&Parasitology YaoundeCameroon Global Schistosomiasis Alliance LondonUK National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention ShanghaiChina

Schistosomiasis,one of the 17 neglected tropical diseases listed by the World Health Organization,presents a substantial public health and economic *** the 261 million people requiring preventive chemotherapy for schistosomiasis in 2013,92%of them lived in sub-Saharan Africa and only 12.7%received preventive ***,in 2010,the WHO reported that schistosomiasis mortality could be as high as 280000 per year in Africa *** May 2012 delegates to the sixty-fifth World Health Assembly adopted resolution WHA65.21 that called for the elimination of schistosomiasis,and foresees the regular treatment of at least 75%of school age children in at-risk *** resolution urged member states to intensify schistosomiasis control programmes and to initiate elimination campaigns where *** this,in June 2015,schistosomiasis was indicated to have the lowest level of preventive chemotherapy implementation in the spectrum of neglected tropical *** was also highlighted as the disease most lacking in *** is perhaps unsurprising,given that it was also the only NTD with access to drug donations but without a coalition of stakeholders that collaborates to boost commitment and *** a consequence,and to ensure that the WHO NTDs Roadmap Targets of 2012 and World Health Assembly Resolution WHA65.21 are met,the Global Schistosomiasis Alliance(GSA)has been set *** and representative,the GSA aims to be a partnership of endemic countries,academic and research institutions,international development agencies and foundations,international organizations,non-governmental development organizations,private sector companies and advocacy and resource mobilisation ***,the GSA calls for a partnership to work for the benefit of endemic countries by addressing health inequity and rural poverty.

关键词： Neglected tropical diseases Schistosomiasis Global Schistosomiasis Alliance Elimination