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Schistosoma mansoni

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https://www.readbyqxmd.com/read/28542189/mir-277-4989-regulate-transcriptional-landscape-during-juvenile-to-adult-transition-in-the-parasitic-helminth-schistosoma-mansoni
#1
Anna V Protasio, Stijn van Dongen, Julie Collins, Leonor Quintais, Diogo M Ribeiro, Florian Sessler, Martin Hunt, Gabriel Rinaldi, James J Collins, Anton J Enright, Matthew Berriman
Schistosomes are parasitic helminths that cause schistosomiasis, a disease affecting circa 200 million people, primarily in underprivileged regions of the world. Schistosoma mansoni is the most experimentally tractable schistosome species due to its ease of propagation in the laboratory and the high quality of its genome assembly and annotation. Although there is growing interest in microRNAs (miRNAs) in trematodes, little is known about the role these molecules play in the context of developmental processes...
May 23, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28542175/single-sex-infection-with-female-schistosoma-mansoni-cercariae-mitigates-hepatic-fibrosis-after-secondary-infection
#2
Nicole Koslowski, Martina Sombetzki, Micha Loebermann, Robby Engelmann, Niels Grabow, Christoph H Österreicher, Michael Trauner, Brigitte Mueller-Hilke, Emil C Reisinger
BACKGROUND: Infection with Schistosoma spp. affects more than 258 million people worldwide. Current treatment strategies are mainly based on the anthelmintic Praziquantel, which is effective against adult worms but neither prevents re-infection nor cures severe liver damage. The best long-term strategy to control schistosomiasis may be to develop an immunization. Therefore, we designed a two-step Schistosoma mansoni infection model to study the immune-stimulating effect of a primary infection with either male or female cercariae, measured on the basis of TH1/TH2-response, granuloma size and hepatic fibrosis after a secondary bisexual S...
May 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28536265/structural-and-enzymatic-insights-into-species-specific-resistance-to-schistosome-parasite-drug-therapy
#3
Alexander B Taylor, Kenneth M Roberts, Xiaohang Cao, Nathaniel E Clark, Stephen P Holloway, Enrica Donati, Chiara M Polcaro, Livia Pica-Mattoccia, Reid S Tarpley, Stanton F McHardy, Donato Cioli, Philip T LoVerde, Paul F Fitzpatrick, P John Hart
The antischistosomal pro-drug oxamniquine is activated by a sulfotransferase (SULT) in the human parasite Schistosoma mansoni Of the three main human blood fluke species, only S. mansoni is sensitive to oxamniquine therapy despite the presence of SULT orthologs in S. haematobium and S. japonicum The reason for this species-specific drug action has remained a mystery for decades. Here we present the crystal structures of S. haematobium and S. japonicum SULTs, including S. haematobium SULT in complex with oxamniquine...
May 23, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28533109/lipopolysaccharide-induced-acute-lung-injury-in-mice-chronically-infected-by-schistosoma-mansoni
#4
Amanda Esteves Rocha Pereira, Maria Ângela Rodrigues, Rômulo Dias Novaes, Ivo Santana Caldas, Raquel Lopes Martins Souza, Alessandro Antônio Costa Pereira
We used a murine model of Schistosoma mansoni (SM) infection and lipopolysaccharide (LPS)-induced endotoxicity to investigate if these conditions can interact to modify the pathological manifestations typically observed in each condition. Swiss mice were randomized into four groups: SAL, uninfected; SM, infected; LPS, uninfected + LPS; and SM + LPS, infected + LPS. S. mansoni infection developed over 120 days, after which blood samples and lungs were collected, peritoneal leukocytes were isolated and cultivated for 6 and 24 h after LPS inoculation (1 mL/kg)...
May 19, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28520808/proteomic-analysis-of-biomphalaria-glabrata-plasma-proteins-with-binding-affinity-to-those-expressed-by-early-developing-larval-schistosoma-mansoni
#5
Xiao-Jun Wu, Nathalie Dinguirard, Grzegorz Sabat, Hong-di Lui, Laura Gonzalez, Michael Gehring, Utibe Bickham-Wright, Timothy P Yoshino
Interactions between early developing Schistosoma mansoni larval stages and the hemolymph of its snail intermediate host represent the first molecular encounter with the snail's immune system. To gain a more comprehensive understanding of this early parasite-host interaction, biotinylated sporocyst tegumental membrane (Mem) proteins and larval transformation proteins (LTP) were affixed to streptavidin-agarose beads and used as affinity matrices to enrich for larval-reactive plasma proteins from susceptible (NMRI) and resistant (BS-90) strains of the snail Biomphalaria glabrata...
May 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28511559/migrating-microbes-what-pathogens-can-tell-us-about-population-movements-and-human-evolution
#6
Charlotte J Houldcroft, Jean-Baptiste Ramond, Riaan F Rifkin, Simon J Underdown
BACKGROUND: The biology of human migration can be observed from the co-evolutionary relationship with infectious diseases. While many pathogens are brief, unpleasant visitors to human bodies, others have the ability to become life-long human passengers. The story of a pathogen's genetic code may, therefore, provide insight into the history of its human host. The evolution and distribution of disease in Africa is of particular interest, because of the deep history of human evolution in Africa, the presence of a variety of non-human primates, and tropical reservoirs of emerging infectious diseases...
May 16, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/28511056/elimination-of-schistosoma-mansoni-in-infected-mice-by-slow-release-of-artemisone
#7
Daniel Gold, Mohammed Alian, Avraham Domb, Yara Karawani, Maysa Jbarien, Jacques Chollet, Richard K Haynes, Ho Ning Wong, Viola Buchholz, Andreas Greiner, Jacob Golenser
The current treatment of schistosomiasis is based on the anti-helminthic drug praziquantel (PZQ). PZQ affects only the adult stages of schistosomes. In addition, resistance to PZQ is emerging. We suggest a drug, which could serve as a potential alternative or complement to PZQ, and as a means of treating infections at earlier, pre-granuloma stage. Derivatives of the peroxidic antimalarial drug artemisinin have been indicated as alternatives, because both plasmodia and schistosomes are blood-feeding parasites...
May 4, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28510608/the-biomphalaria-glabrata-dna-methylation-machinery-displays-spatial-tissue-expression-is-differentially-active-in-distinct-snail-populations-and-is-modulated-by-interactions-with-schistosoma-mansoni
#8
Kathrin K Geyer, Umar H Niazi, David Duval, Céline Cosseau, Chad Tomlinson, Iain W Chalmers, Martin T Swain, David J Cutress, Utibe Bickham-Wright, Sabrina E Munshi, Christoph Grunau, Timothy P Yoshino, Karl F Hoffmann
BACKGROUND: The debilitating human disease schistosomiasis is caused by infection with schistosome parasites that maintain a complex lifecycle alternating between definitive (human) and intermediate (snail) hosts. While much is known about how the definitive host responds to schistosome infection, there is comparably less information available describing the snail's response to infection. METHODOLOGY/PRINCIPLE FINDINGS: Here, using information recently revealed by sequencing of the Biomphalaria glabrata intermediate host genome, we provide evidence that the predicted core snail DNA methylation machinery components are associated with both intra-species reproduction processes and inter-species interactions...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28508897/whole-genome-analysis-of-a-schistosomiasis-transmitting-freshwater-snail
#9
Coen M Adema, LaDeana W Hillier, Catherine S Jones, Eric S Loker, Matty Knight, Patrick Minx, Guilherme Oliveira, Nithya Raghavan, Andrew Shedlock, Laurence Rodrigues do Amaral, Halime D Arican-Goktas, Juliana G Assis, Elio Hideo Baba, Olga L Baron, Christopher J Bayne, Utibe Bickham-Wright, Kyle K Biggar, Michael Blouin, Bryony C Bonning, Chris Botka, Joanna M Bridger, Katherine M Buckley, Sarah K Buddenborg, Roberta Lima Caldeira, Julia Carleton, Omar S Carvalho, Maria G Castillo, Iain W Chalmers, Mikkel Christensens, Sandra Clifton, Celine Cosseau, Christine Coustau, Richard M Cripps, Yesid Cuesta-Astroz, Scott F Cummins, Leon di Stephano, Nathalie Dinguirard, David Duval, Scott Emrich, Cédric Feschotte, Rene Feyereisen, Peter FitzGerald, Catrina Fronick, Lucinda Fulton, Richard Galinier, Sandra G Gava, Michael Geusz, Kathrin K Geyer, Gloria I Giraldo-Calderón, Matheus de Souza Gomes, Michelle A Gordy, Benjamin Gourbal, Christoph Grunau, Patrick C Hanington, Karl F Hoffmann, Daniel Hughes, Judith Humphries, Daniel J Jackson, Liana K Jannotti-Passos, Wander de Jesus Jeremias, Susan Jobling, Bishoy Kamel, Aurélie Kapusta, Satwant Kaur, Joris M Koene, Andrea B Kohn, Dan Lawson, Scott P Lawton, Di Liang, Yanin Limpanont, Sijun Liu, Anne E Lockyer, TyAnna L Lovato, Fernanda Ludolf, Vince Magrini, Donald P McManus, Monica Medina, Milind Misra, Guillaume Mitta, Gerald M Mkoji, Michael J Montague, Cesar Montelongo, Leonid L Moroz, Monica C Munoz-Torres, Umar Niazi, Leslie R Noble, Francislon S Oliveira, Fabiano S Pais, Anthony T Papenfuss, Rob Peace, Janeth J Pena, Emmanuel A Pila, Titouan Quelais, Brian J Raney, Jonathan P Rast, David Rollinson, Izinara C Rosse, Bronwyn Rotgans, Edwin J Routledge, Kathryn M Ryan, Larissa L S Scholte, Kenneth B Storey, Martin Swain, Jacob A Tennessen, Chad Tomlinson, Damian L Trujillo, Emanuela V Volpi, Anthony J Walker, Tianfang Wang, Ittiprasert Wannaporn, Wesley C Warren, Xiao-Jun Wu, Timothy P Yoshino, Mohammed Yusuf, Si-Ming Zhang, Min Zhao, Richard K Wilson
Biomphalaria snails are instrumental in transmission of the human blood fluke Schistosoma mansoni. With the World Health Organization's goal to eliminate schistosomiasis as a global health problem by 2025, there is now renewed emphasis on snail control. Here, we characterize the genome of Biomphalaria glabrata, a lophotrochozoan protostome, and provide timely and important information on snail biology. We describe aspects of phero-perception, stress responses, immune function and regulation of gene expression that support the persistence of B...
May 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28504841/chemical-composition-antibacterial-schistosomicidal-and-cytotoxic-activities-of-the-essential-oil-of-dysphania-ambrosioides-l-mosyakin-clemants-chenopodiaceae
#10
Marina H Soares, Herbert J Dias, Tatiana M Vieira, Maria G M de Souza, Ana F F Cruz, Fernanda R Badoco, Heloiza D Nicolella, Wilson R Cunha, Milton Groppo, Carlos H G Martins, Denise C Tavares, Lizandra G Magalhães, Antônio E M Crotti
We have investigated the chemical composition and the antibacterial activity of the essential oil of Dysphania ambrosioides (L.) Mosyakin & Clemants (Chenopodiaceae) (DA-EO) against a representative panel of cariogenic bacteria. We have also assessed the in vitro schistosomicidal effects of DA-EO on Schistosoma mansoni and its cytotoxicity to GM07492-A cells in vitro. Gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) revealed that the monoterpenes cis-piperitone oxide (35.2%), p-cymene (14...
May 15, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28500821/serum-carbonic-anhydrase-1-is-a-biomarker-for-diagnosis-of-human-schistosoma-mansoni-infection
#11
Manal Ibrahim Kardoush, Brian J Ward, Momar Ndao
AbstractSchistosoma mansoni is a major public health threat in many parts of the world. The current diagnostic tests for schistosomiasis are suboptimal, particularly early in infection, when the parasite burden is low and with reinfection after treatment. We sought to identify novel biomarkers of active infection by studying serum proteins in a mouse model of schistosomiasis followed by confirmation in chronically infected patients. Acute (6 weeks) and chronic (12 weeks) sera from S. mansoni-infected C57Bl/6 mice as well as sera from chronically infected patients were assessed using two proteomic platforms: surface-enhanced, laser desorption and ionization, time-of-flight mass spectrometry and Velos Orbitrap mass spectrometry...
April 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28497228/18-des-hydroxy-cytochalasin-an-antiparasitic-compound-of-diaporthe-phaseolorum-92c-an-endophytic-fungus-isolated-from-combretum-lanceolatum-pohl-ex-eichler
#12
Elson Rudimar Brissow, Igor Pereira da Silva, Kátia Aparecida de Siqueira, Jaqueline Alves Senabio, Leticia Pereira Pimenta, Ana Helena Januário, Lizandra Guidi Magalhães, Ricardo Andrade Furtado, Denise Crispim Tavares, Policarpo Ademar Sales Junior, Jane Lima Santos, Marcos Antônio Soares
Chemical investigation of the ethyl acetate extract from the endophytic fungus Diaporthe phaseolorum-92C (92C) isolated from the roots of Combretum lanceolatum led to the isolation of 18-des-hydroxy Cytochalasin H (compound 1). The trypanocidal and schistosomicidal activity and cytotoxicity of the extract from 92C were evaluated. The schistosomicidal, leishmanicidal, antimicrobial, and antioxidant actions, as well as the antitumor activity against the breast cancer cells MDA-MB-231 and MCF-7, and the cytotoxicity towards normal human lung fibroblasts GM07492A of compound 1 was tested...
May 12, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28495384/medicinal-chemistry-of-antischistosomal-drugs-praziquantel-and-oxamniquine
#13
REVIEW
Vinícius Barros Ribeiro da Silva, Bruna Rafaella Koresch Leiva Campos, Jamerson Ferreira de Oliveira, Jean-Luc Decout, Maria do Carmo Alves de Lima
Neglected tropical diseases (NTDs) are a group of diseases that, besides prevailing in poverty conditions, contribute to the maintenance of social inequality, being a strong barrier to a country development. Schistosomiasis, a NTD, is a tropical and subtropical disease caused by the trematode Schistosoma mansoni (Africa, Middle East, Caribbean, Brazil, Venezuela, Suriname), japonicum (China, Indonesia, the Philippines), mekongi (several districts of Cambodia and the Lao People's Democratic Republic), intercalatum and guianensis (areas of tropical rainforests in Central Africa) and hematobium (Middle East Africa, Corsica, France) whose adult forms inhabit the mesenteric vessels of the host, while the intermediate forms are found in the aquatic gastropod snails of the genus Biomphalaria...
April 27, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28482920/stage-and-tissue-expression-patterns-of-schistosoma-mansoni-venom-allergen-like-proteins-smval-4-13-16-and-24
#14
Rafaela Sachetto Fernandes, Tereza Cristina Barbosa, Mayra Mara Ferrari Barbosa, Patrícia Aoki Miyasato, Eliana Nakano, Luciana Cezar Cerqueira Leite, Leonardo Paiva Farias
BACKGROUND: Schistosoma mansoni venom allergen-like protein (SmVAL) is a gene family composed of 29 members divided into group 1 encoding proteins potentially secreted, and group 2 encoding intracellular components. Some members were found to be upregulated in the transition of germ ball - cercariae - day 3 schistosomula, suggesting that group 1 SmVAL proteins are associated with the invasion of the human host, although their functions are not completely established. Recently, we have described the localization of SmVAL7 (group 1) and SmVAL6 (group 2) transcripts in the oesophageal gland and in the oral and ventral suckers of adult parasites, respectively...
May 8, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28477200/th9-cells-and-parasitic-inflammation-use-of-nippostrongylus-and-schistosoma-models
#15
Miguel Enrique Serrano Pinto, Paula Licona-Limón
Th9 cells are a new subpopulation of CD4+ T helper cells, characterized by the expression of IL-9 that have been involved in type 2 immune responses, antitumor responses and autoimmune diseases. Here, we describe two different parasitic models frequently maintained in the laboratory where Th9 cells or IL-9 (the cytokine produced by Th9 cells) has been shown to play critical roles in pathogen clearance and immune response activation: the nematode Nippostrongylus brasiliensis and the trematode Schistosoma mansoni...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28472067/the-effect-of-current-schistosoma-mansoni-infection-on-the-immunogenicity-of-a-candidate-tb-vaccine-mva85a-in-bcg-vaccinated-adolescents-an-open-label-trial
#16
Anne Wajja, Dennison Kizito, Beatrice Nassanga, Angela Nalwoga, Joyce Kabagenyi, Simon Kimuda, Ronald Galiwango, Gertrude Mutonyi, Samantha Vermaak, Iman Satti, Jaco Verweij, Edridah Tukahebwa, Stephen Cose, Jonathan Levin, Pontiano Kaleebu, Alison M Elliott, Helen McShane
INTRODUCTION: Helminth infection may affect vaccine immunogenicity and efficacy. Adolescents, a target population for tuberculosis booster vaccines, often have a high helminth burden. We investigated effects of Schistosoma mansoni (Sm) on the immunogenicity and safety of MVA85A, a model candidate tuberculosis vaccine, in BCG-vaccinated Ugandan adolescents. METHODS: In this phase II open label trial we enrolled 36 healthy, previously BCG-vaccinated adolescents, 18 with no helminth infection detected, 18 with Sm only...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28468667/dynamics-of-freshwater-snails-and-schistosoma-infection-prevalence-in-schoolchildren-during-the-construction-and-operation-of-a-multipurpose-dam-in-central-c%C3%A3-te-d-ivoire
#17
Nana R Diakité, Mirko S Winkler, Jean T Coulibaly, Négnorogo Guindo-Coulibaly, Jürg Utzinger, Eliézer K N'Goran
BACKGROUND: The construction and operation of small multipurpose dams in Africa have a history of altering the transmission of water-based diseases, including schistosomiasis. The current study was designed to investigate the abundance and dynamics of schistosomiasis intermediate host snails and Schistosoma infections in humans during the construction and the first years of operation of a small multipurpose dam in Côte d'Ivoire. METHODS: The study was carried out in Raffierkro and four neighbouring villages in central Côte d'Ivoire between 2007 and 2012...
May 4, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28458073/community-directed-mass-drug-administration-is-undermined-by-status-seeking-in-friendship-networks-and-inadequate-trust-in-health-advice-networks
#18
Goylette F Chami, Andreas A Kontoleon, Erwin Bulte, Alan Fenwick, Narcis B Kabatereine, Edridah M Tukahebwa, David W Dunne
Over 1.9 billion individuals require preventive chemotherapy through mass drug administration (MDA). Community-directed MDA relies on volunteer community medicine distributors (CMDs) and their achievement of high coverage and compliance. Yet, it is unknown if village social networks influence effective MDA implementation by CMDs. In Mayuge District, Uganda, census-style surveys were conducted for 16,357 individuals from 3,491 households in 17 villages. Praziquantel, albendazole, and ivermectin were administered for one month in community-directed MDA to treat Schistosoma mansoni, hookworm, and lymphatic filariasis...
June 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28457995/schistosoma-mansoni-off-target-analyses-using-nonspecific-double-stranded-rnas-as-control-for-rnai-experiments-in-schistosomula
#19
Sandra Grossi Gava, Naiara Clemente Tavares, Anna Christina de Matos Salim, Flávio Marcos Gomes de Araújo, Guilherme Oliveira, Marina Moraes Mourão
RNA interference is a well established and widely used reverse genetic tool available for gene functional studies in trematodes. This technique requires the use of nonrelevant double-stranded RNA as control. However, several authors have reported inconsistencies associated with RNAi. We used RNASeq to analyze genes affected by nonspecific dsRNA exposure. We found only few genes presenting altered expression in schistosomula exposed to GFP or mCherry nonspecific-dsRNAs, most of them encoding uncharacterized proteins...
April 27, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28454578/evaluating-the-variation-in-the-projected-benefit-of-community-wide-mass-treatment-for-schistosomiasis-implications-for-future-economic-evaluations
#20
Hugo C Turner, James E Truscott, Alison A Bettis, Sam H Farrell, Arminder K Deol, Jane M Whitton, Fiona M Fleming, Roy M Anderson
BACKGROUND: The majority of schistosomiasis control programmes focus on targeting school-aged children. Expanding the use of community-wide mass treatment to reach more adults is under consideration. However, it should be noted that this would require a further increase in programmatic resources, international aid, and commitment for the provision of praziquantel. Consequently, it is important to understand (i) where a change of strategy would have the greatest benefit, and (ii) how generalisable the conclusions of field trials and analytical studies based on mathematical models investigating the impact of community-wide mass treatment, are to a broad range of settings...
April 28, 2017: Parasites & Vectors
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