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Schistosoma mansoni

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https://www.readbyqxmd.com/read/27920569/does-calcium-channel-blockade-have-a-role-in-prevention-of-expression-of-sepsis-in-renal-transplant-recipients
#1
REVIEW
John A D'Elia, Ray E Gleason, Anthony P Monaco, Larry A Weinrauch
Many antihypertensive agents have been demonstrated to assist in preservation of kidney function, among them those that modulate calcium channels. Calcium channel blockers may also be of value in protecting hemodialysis patients from complications of sepsis. In diabetic recipients of kidney transplant allografts treated with cyclosporine, calcium channel blockade has been retrospectively linked to improved graft preservation and to fewer episodes of sepsis. This brief review outlines clinical and experimental publications on potential protection from sepsis by addition of calcium channel blockers to standard antibiotic therapy in individuals who may or may not have normal kidney function, or in the presence or absence of immunosuppression...
2016: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/27903301/high-prevalence-of-strongyloides-stercoralis-in-school-aged-children-in-a-rural-highland-of-north-western-ethiopia-the-role-of-intensive-diagnostic-work-up
#2
Aranzazu Amor, Esperanza Rodriguez, José M Saugar, Ana Arroyo, Beatriz López-Quintana, Bayeh Abera, Mulat Yimer, Endalew Yizengaw, Derejew Zewdie, Zimman Ayehubizu, Tadesse Hailu, Wondemagegn Mulu, Adriana Echazú, Alejandro J Krolewieki, Pilar Aparicio, Zaida Herrador, Melaku Anegagrie, Agustín Benito
BACKGROUND: Soil-transmitted helminthiases (hookworms, Ascaris lumbricoides and Trichuris trichiura) are extremely prevalent in school-aged children living in poor sanitary conditions. Recent epidemiological data suggest that Strongyloides stercoralis is highly unreported. However, accurate data are essential for conducting interventions aimed at introducing control and elimination programmes. METHODS: We conducted a cross-sectional survey of 396 randomly selected school-aged children in Amhara region in rural area in north-western Ethiopia, to assess the prevalence of S...
December 1, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27903067/predicting-the-spatial-distribution-of-biomphalaria-straminea-a-potential-intermediate-host-for-schistosoma-mansoni-in-china
#3
Mohamed R Habib, Yun-Hai Guo, Shan Lv, Wen-Biao Gu, Xiao-Heng Li, Xiao-Nong Zhou
Schistosomiasis is one of the most prevalent parasitic diseases impacting human health in the tropics and sub-tropics. The geographic distribution of Schistosoma mansoni, the most widespread species, includes areas in Africa, the Middle East, South America and the Caribbean. Snails of the genus Biomphalaria act as intermediate host for S. mansoni. Biomphalaria straminea is not indigenous in China but was accidentally introduced to Hong Kong from South America and has spread to other habitats in the southern parts of the country...
November 29, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27881115/intestinal-polyparasitism-with-special-emphasis-to-soil-transmitted-helminths-among-residents-around-gilgel-gibe-dam-southwest-ethiopia-a-community-based-survey
#4
Zeleke Mekonnen, Sultan Suleman, Abdissa Biruksew, Tamirat Tefera, Legese Chelkeba
BACKGROUND: One third of the world population is estimated to be infected with intestinal parasites. The most affected people are children and the poor people living in tropics and subtropics. Polyparasitism (the concurrent infection with multiple intestinal parasite species) is found to be the norm among the same population although accurate estimate of its magnitude is unknown. It was found that polyparasitism might have a greater impact on morbidity than single species infection which might also increase susceptibility to other infections...
November 23, 2016: BMC Public Health
https://www.readbyqxmd.com/read/27880808/natural-schistosoma-mansoni-infection-in-the-wild-reservoir-nectomys-squamipes-leads-to-excessive-lipid-droplet-accumulation-in-hepatocytes-in-the-absence-of-liver-functional-impairment
#5
Kátia B Amaral, Thiago P Silva, Kássia K Malta, Lívia A S Carmo, Felipe F Dias, Mariana R Almeida, Gustavo F S Andrade, Jefferson S Martins, Roberto R Pinho, Sócrates F Costa-Neto, Rosana Gentile, Rossana C N Melo
Schistosomiasis is a neglected tropical disease of a significant public health impact. The water rat Nectomys squamipes is one of the most important non-human hosts in the schistosomiasis mansoni transmission in Brazil, being considered a wild reservoir. Cellular mechanisms that contribute to the physiological adaptation of this rodent to the Schistosoma mansoni parasite are poorly understood. Here we identified, for the first time, that a hepatic steatosis, a condition characterized by excessive lipid accumulation with formation of lipid droplets (LDs) within hepatocytes, occurs in response to the natural S...
2016: PloS One
https://www.readbyqxmd.com/read/27875592/curcumin-generates-oxidative-stress-and-induces-apoptosis-in-adult-schistosoma-mansoni-worms
#6
Daniela de Paula Aguiar, Mayara Brunetto Moreira Moscardini, Enyara Rezende Morais, Renato Graciano de Paula, Pedro Manuel Ferreira, Ana Afonso, Silvana Belo, Amanda Tomie Ouchida, Carlos Curti, Wilson Roberto Cunha, Vanderlei Rodrigues, Lizandra Guidi Magalhães
Inducing apoptosis is an interesting therapeutic approach to develop drugs that act against helminthic parasites. Researchers have investigated how curcumin (CUR), a biologically active compound extracted from rhizomes of Curcuma longa, affects Schistosoma mansoni and several cancer cell lines. This study evaluates how CUR influences the induction of apoptosis and oxidative stress in couples of adult S. mansoni worms. CUR decreased the viability of adult worms and killed them. The tegument of the parasite suffered morphological changes, the mitochondria underwent alterations, and chromatin condensed...
2016: PloS One
https://www.readbyqxmd.com/read/27871882/schistosomal-derived-lysophosphatidylcholine-triggers-m2-polarization-of-macrophages-through-ppar%C3%AE-dependent-mechanisms
#7
Leonardo Santos Assunção, Kelly G Magalhães, Alan Brito Carneiro, Raphael Molinaro, Patrícia E Almeida, Georgia C Atella, Hugo C Castro-Faria-Neto, Patrícia T Bozza
Mansonic schistosomiasis is a disease caused by the trematode Schistosoma mansoni, endemic to tropical countries. S. mansoni infection induces the formation of granulomas and potent polarization of Th2-type immune response. There is great interest in understanding the mechanisms used by this parasite that causes a modulation of the immune system. Recent studies from our group demonstrated that lipids of S. mansoni, including lysophosphatidylcholine (LPC) have immunomodulatory activity. In the present study, our aim was to investigate the role of lipids derived from S...
November 15, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27836498/repositioning-of-chlorambucil-as-a-potential-anti-schistosomal-agent
#8
Maha M Eissa, Shereen F Mossallam, Eglal I Amer, Layla K Younis, Hoda A Rashed
As parasites and cancer cells share many lifestyle and behavioral resemblances, repositioning of anti-cancerous agents as anti-parasitic is quite trendy, especially those sharing the same therapeutic targets. Therefore, the current study investigated the in vitro efficacy of ascending concentrations of chlorambucil (0.5-20μg/ml) against adult Schistosoma mansoni worms, over 72h. Additionally, its in vivo effects against the different developmental stages of the worm were assessed, after an oral dose of 2.5mg/kg/day for five successive days, through evaluating the worm load reduction and worms' morphological alterations and oogram changes...
November 9, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27822385/intestinal-schistosomiasis-among-primary-schoolchildren-in-two-on-shore-communities-in-rorya-district-northwestern-tanzania-prevalence-intensity-of-infection-and-associated-risk-factors
#9
David Z Munisi, Joram Buza, Emmanuel A Mpolya, Safari M Kinung'hi
In Tanzania, Schistosoma mansoni is of great public health importance. Understanding the prevalence and infection intensity is important for targeted, evidence-based control strategies. This study aimed at studying the prevalence, intensity, and risk factors of S. mansoni among schoolchildren in the study area. A cross-sectional study was conducted in Busanga and Kibuyi villages. Sampled 513 schoolchildren provided stool specimens which were examined using kato-katz method. Pretested questionnaire was used to collect sociodemographic data and associated risk factors...
2016: Journal of Parasitology Research
https://www.readbyqxmd.com/read/27821159/ceratonia-siliqua-pod-extract-ameliorates-schistosoma-mansoni-induced-liver-fibrosis-and-oxidative-stress
#10
Ebtesam M Al-Olayan, Manal F El-Khadragy, Reem A Alajmi, Mohamed S Othman, Amira A Bauomy, Shaimaa R Ibrahim, Ahmed E Abdel Moneim
BACKGROUND: Schistosomiasis is a prevalent parasitic disease found predominantly in tropical and sub-tropical areas of the developing world, with the second highest socioeconomic and public health burden despite strenuous control efforts. In the present study, we aimed to investigate the ameliorative effects of Ceratonia siliqua pod extract (CPE) on liver fibrosis and oxidative stress in mice infected with Schistosoma mansoni. METHODS: The schistosomal hepatopathologic mouse model was established by tail immersion with schistosomal cercaria...
November 8, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27814746/modelling-the-spatial-and-seasonal-distribution-of-suitable-habitats-of-schistosomiasis-intermediate-host-snails-using-maxent-in-ndumo-area-kwazulu-natal-province-south-africa
#11
Tawanda Manyangadze, Moses John Chimbari, Michael Gebreslasie, Pietro Ceccato, Samson Mukaratirwa
BACKGROUND: Schistosomiasis is a snail-borne disease endemic in sub-Saharan Africa transmitted by freshwater snails. The distribution of schistosomiasis coincides with that of the intermediate hosts as determined by climatic and environmental factors. The aim of this paper was to model the spatial and seasonal distribution of suitable habitats for Bulinus globosus and Biomphalaria pfeifferi snail species (intermediate hosts for Schistosoma haematobium and Schistosoma mansoni, respectively) in the Ndumo area of uMkhanyakude district, South Africa...
November 4, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27812220/tissue-degeneration-following-loss-of-schistosoma-mansoni-cbp1-is-associated-with-increased-stem-cell-proliferation-and-parasite-death-in-vivo
#12
Julie N R Collins, James J Collins
Schistosomiasis is second only to malaria in terms of the global impact among diseases caused by parasites. A striking feature of schistosomes are their ability to thrive in their hosts for decades. We have previously demonstrated that stem cells, called neoblasts, promote homeostatic tissue maintenance in adult schistosomes and suggested these cells likely contribute to parasite longevity. Whether these schistosome neoblasts have functions independent of homeostatic tissue maintenance, for example in processes such as tissue regeneration following injury, remains unexplored...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27806050/protein-translation-enzyme-lysyl-trna-synthetase-presents-a-new-target-for-drug-development-against-causative-agents-of-loiasis-and-schistosomiasis
#13
Arvind Sharma, Manmohan Sharma, Manickam Yogavel, Amit Sharma
Helminth parasites are an assemblage of two major phyla of nematodes (also known as roundworms) and platyhelminths (also called flatworms). These parasites are a major human health burden, and infections caused by helminths are considered under neglected tropical diseases (NTDs). These infections are typified by limited clinical treatment options and threat of drug resistance. Aminoacyl-tRNA synthetases (aaRSs) are vital enzymes that decode genetic information and enable protein translation. The specific inhibition of pathogen aaRSs bores well for development of next generation anti-parasitics...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27802332/anti-arthritic-activity-of-schistosoma-mansoni-and-trichinella-spiralis-derived-antigens-in-adjuvant-arthritis-in-rats-role-of-foxp3-treg-cells
#14
Maha M Eissa, Dalia K Mostafa, Amany A Ghazy, Mervat Z El Azzouni, Laila M Boulos, Layla K Younis
A growing body of evidence supports the concept of helminths therapy in a variety of autoimmune diseases. Here, we aimed to investigate the protective effects of autoclaved Schistosoma mansoni antigen (ASMA) and Trichinella spiralis antigen (ATSA) on the clinical and immunopathological features of rheumatoid arthritis (RA). Adjuvant arthritis was induced by subcutaneous and intradermal injections of complete Freund's adjuvant into the plantar surface of the right hind paw and the root of the tail, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27793110/effect-of-anthelminthic-treatment-on-helminth-infection-and-related-anaemia-among-school-age-children-in-northwestern-ethiopia
#15
Yonas Yimam, Abraham Degarege, Berhanu Erko
BACKGROUND: Information about improvements in the health status of population at-risk of helminth infection after anthelminthic treatment helps to evaluate the effectiveness of the large scale deworming program. The objectives of this study were to assess the impact of anthelminthic treatment on the prevalence and intensity of intestinal helminth infection, haemoglobin level and prevalence of anaemia among school-age children. METHODS: A total of 403 children attending Tikur Wuha Elementary School in Jiga, northwestern Ethiopia were enrolled in this study between February and March 2011...
October 28, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27784323/gpcr-and-ir-genes-in-schistosoma-mansoni-miracidia
#16
Di Liang, Min Zhao, Tianfang Wang, Donald P McManus, Scott F Cummins
BACKGROUND: Schistosoma species are responsible for the disease schistosomiasis, a highly prevalent helminthic disease that requires a freshwater snail as intermediate host. The S. mansoni free-living miracidium must utilize olfaction to find a suitable snail host, and certain types of rhodopsin G protein-coupled receptors (GPCRs) and ionotropic receptors (IRs) have been identified as olfactory receptors in other animal phyla. The Schistosoma genome project, together with the recent availability of proteomic databases, allowed for studies to explore receptors within S...
October 26, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27778108/seroprevalence-of-five-parasitic-pathogens-in-pregnant-women-in-ten-caribbean-countries
#17
Fengguang Guo, Martin S Forde, Stephen R Werre, Rosina C Krecek, Guan Zhu
To date, published epidemiological studies of parasitic infections in humans in the Caribbean region are very limited. Here, we report the seroprevalence of five parasitic pathogens, including Ascaris lumbricoides, Entamoeba histolytica, Giardia lamblia, Schistosoma mansoni, and Toxocara canis in 435 serum samples collected between 2008 and 2011 from pregnant women in ten Caribbean islands. We tested the serum samples for IgG antibodies against the five parasites by enzyme-linked immunosorbent assay (ELISA)...
October 24, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27772528/prevalence-of-schistosoma-mansoni-infection-and-the-therapeutic-efficacy-of-praziquantel-among-school-children-in-manna-district-jimma-zone-southwest-ethiopia
#18
Mitiku Bajiro, Daniel Dana, Mio Ayana, Daniel Emana, Zeleke Mekonnen, Belay Zawdie, Asfaw Garbi, Ashenafi Kure, Ahmed Zeynudin
BACKGROUND: Intestinal schistosomiasis is one of the neglected tropical parasitic diseases caused by Schistosoma mansoni. Currently, the control measures for the disease are mainly based on mass drug administration (MDA) with praziquantel (PZQ) targeting the school-age children. In Ethiopia, the potential foci for schistosomiasis and therapeutic efficacy of PZQ among school-age children remain poorly explored. Therefore, we determined both the prevalence and intensity of S. mansoni infection and the therapeutic efficacy of PZQ among school children in the Manna District (new foci for S...
October 24, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27771462/novel-synthetic-compounds-with-endoperoxide-structure-damage-juvenile-stage-of-schistosoma-mansoni-by-targeting-lysosome-like-organelles
#19
Masafumi Yamabe, Takashi Kumagai, Rieko Shimogawara, Emmanuel Awusah Blay, Akina Hino, Koichiro Ichimura, Akira Sato, Hye-Sook Kim, Nobuo Ohta
The new synthetic compound 1,2,6,7-tetraoxaspiro[7.11]nonadecan (N-89), a novel anti-malaria drug candidate, is also a promising drug candidate against schistosomiasis with killing effects against juvenile stage of S. mansoni. In order to investigate how N-89 kills schistosomes, we used a derivative of N-89, 6-(1,2,6,7-tetraoxaspiro[7.11] nonadec-4-yl)hexan-1-ol (N-251), which enables us to conjugate with fluorescent reagents. Firstly, N-251 showed strong killing effects to larvae of S. mansoni in vitro. Ultrastructural analysis showed the disruptions of the lysosome-like organelles or the acetabular glands, followed by cytoplasmic lysis inside the worm body in N-251-treated group under electron microscopy...
October 19, 2016: Parasitology International
https://www.readbyqxmd.com/read/27764257/hiv-1-integrates-widely-throughout-the-genome-of-the-human-blood-fluke-schistosoma-mansoni
#20
Sutas Suttiprapa, Gabriel Rinaldi, Isheng J Tsai, Victoria H Mann, Larisa Dubrovsky, Hong-Bin Yan, Nancy Holroyd, Thomas Huckvale, Caroline Durrant, Anna V Protasio, Tatiana Pushkarsky, Sergey Iordanskiy, Matthew Berriman, Michael I Bukrinsky, Paul J Brindley
Schistosomiasis is the most important helminthic disease of humanity in terms of morbidity and mortality. Facile manipulation of schistosomes using lentiviruses would enable advances in functional genomics in these and related neglected tropical diseases pathogens including tapeworms, and including their non-dividing cells. Such approaches have hitherto been unavailable. Blood stream forms of the human blood fluke, Schistosoma mansoni, the causative agent of the hepatointestinal schistosomiasis, were infected with the human HIV-1 isolate NL4-3 pseudotyped with vesicular stomatitis virus glycoprotein...
October 2016: PLoS Pathogens
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