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https://www.readbyqxmd.com/read/28231243/product-development-programs-for-neglected-tropical-diseases-a-crucial-role-for-expert-meetings
#1
Leonie Hussaarts, Kim van der Weijde, Pierre Dome, Elly Kourany-Lefoll, Jutta Reinhard-Rupp, Remco de Vrueh
No abstract text is available yet for this article.
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28222334/a-quantification-method-for-determination-of-racemate-praziquantel-and-r-enantiomer-in-rat-plasma-for-comparison-of-their-pharmacokinetics
#2
Danlu Zhang, Haina Wang, Jianbo Ji, Lei Nie, Dequn Sun
Praziquantel is the drug of first choice for the control and treatment of all forms of schistosomiasis. Praziquantel is administered as a racemate, including R-enantiomer and S-enantiomer. Among them, R-enantiomer has main contribution to schistosomicidal activity. In this study, a sensitive and rapid liquid chromatography with tandem mass spectrometry was established and validated to determine the concentration of racemate praziquantel and R-enantiomer in rat plasma after oral administration. Chromatographic separation was performed on an Agilent Zorbax SB-C18 column...
February 14, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28222149/ultrasonographic-evaluation-of-urinary-tract-morbidity-in-school-aged-and-preschool-aged-children-infected-with-schistosoma-haematobium-and-its-evolution-after-praziquantel-treatment-a-randomized-controlled-trial
#3
Beatrice Barda, Jean T Coulibaly, Christoph Hatz, Jennifer Keiser
BACKGROUND: Schistosoma haematobium infections are responsible for significant urinary tract (UT) complications. Schistosomiasis control programs aim to reduce morbidity, yet the extent of morbidity in preschool-aged children and the impact of treatment on morbidity reduction are not well studied. METHODOLOGY: Our study was embedded in a randomized, placebo-controlled, single-blind trial in Côte d'Ivoire, which evaluated the efficacy and safety of three doses (20, 40 and 60 mg/kg) of praziquantel in school-aged (SAC) and preschool-aged (PSAC) children infected with S...
February 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28221678/validated-capillary-electrophoretic-method-for-the-enantiomeric-quality-control-of-r-praziquantel
#4
Zoltán-István Szabó, Réka Gál, Levente Szőcs, Róbert Ludmerczki, Daniela-Lucia Muntean, Béla Noszál, Gergő Tóth
The enantiomers of praziquantel, the drug of choice in schistosomiasis, were separated by electrokinetic chromatography with cyclodextrins. Nine anionic cyclodextrins were screened for their ability to discriminate between the uncharged enantiomers. Seven investigated selectors presented chiral interactions with the enantiomers, these cases being interpreted in terms of stability constants and complex mobilities. The best results were delivered by sulfated-β-cyclodextrin, where quasi-equal stability constants were accompanied by extreme selectivity values and was explained on the basis of highly different mobilities of the transient diastereomeric complexes...
February 21, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28219563/repeated-prosthetic-mitral-valve-thrombosis-in-fluke%C3%A2-infection-induced-hypereosinophilic-syndrome
#5
Yiran Zhang, Liang Ma
A 43-year-old female patient with mitral valve stenosis and hypereosinophilia on admission received mechanical mitral valve replacement. During the 2 years after the first surgery, the patient underwent two mitral valve revision operations for repeated prosthetic mitral valve thrombosis. During the 2-year period, the patient's absolute eosinophil count was found elevated repeatedly. Finally, fluke antibody detection revealed fluke infection and, after praziquantel treatment, a normal level of absolute eosinophil count has been maintained and recurrent thrombosis has not occurred for 18 months...
March 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28219412/moving-from-control-to-elimination-of-schistosomiasis-in-sub-saharan-africa-time-to-change-and-adapt-strategies
#6
REVIEW
Louis-Albert Tchuem Tchuenté, David Rollinson, J Russell Stothard, David Molyneux
Schistosomiasis is a water borne parasitic disease of global importance and with ongoing control the disease endemic landscape is changing. In sub-Saharan Africa, for example, the landscape is becoming ever more heterogeneous as there are several species of Schistosoma that respond in different ways to ongoing preventive chemotherapy and the inter-sectoral interventions currently applied. The major focus of preventive chemotherapy is delivery of praziquantel by mass drug administration to those shown to be, or presumed to be, at-risk of infection and disease...
February 20, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28216368/in-vitro-and-in-vivo-cysticidal-activity-of-extracts-and-isolated-flavanone-from-the-bark-of-prunus-serotina-a-bio-guided-study
#7
Francisca Palomares-Alonso, Irma Susana Rojas-Tomé, Guadalupe Palencia Hernández, María Adelina Jiménez-Arellanes, Martha Lydia Macías-Rubalcava, Angélica González-Maciel, Andrea Ramos-Morales, Rosalba Santiago-Reyes, Nelly Castro, Iliana González-Hernández, Yadira Rufino-González, Helgi Jung-Cook
Currently, neurocysticercosis treatment involves two drugs: albendazole and praziquantel; however, their efficacy is suboptimal and new cysticidal drugs are needed. The present paper reports the cysticidal activity of extracts of the bark from Prunus serotina against Taenia crassiceps cysts and the isolation and identification of the main components of the most active extract. Results showed that all extracts displayed in vitro cysticidal activity (EC50=17.9-88.5μg/mL), being the methanolic the most active and selective...
February 16, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28214126/pulmonary-nodules-in-african-migrants-caused-by-chronic-schistosomiasis
#8
REVIEW
Federico Gobbi, Dora Buonfrate, Andrea Angheben, Anna Beltrame, Matteo Bassetti, Luca Bertolaccini, Giuseppe Bogina, Simone Caia, Silvia Duranti, Maria Gobbo, Valentina Marchese, Stefania Marocco, Maria Merelli, Geraldo Monteiro, Alberto Terzi, Zeno Bisoffi
Schistosomiasis is a neglected tropical disease that can cause mainly hepatic and genitourinary damage, depending on the species. Involvement of the lungs has been commonly described in acute infection (Katayama syndrome) and chronic infection (pulmonary hypertension). Although rarely reported in the scientific literature, cases of lung nodules due to chronic schistosome infection are also possible and are probably more frequent than commonly thought. Here we report seven cases of African migrants who were diagnosed with chronic schistosomiasis and pulmonary nodules due to deposition of schistosome eggs, and we compare our findings to the case reports found in the scientific literature...
February 14, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28212414/decline-in-infection-related-morbidities-following-drug-mediated-reductions-in-the-intensity-of-schistosoma-infection-a-systematic-review-and-meta-analysis
#9
Gisele Andrade, David J Bertsch, Andrea Gazzinelli, Charles H King
BACKGROUND: Since 1984, WHO has endorsed drug treatment to reduce Schistosoma infection and its consequent morbidity. Cross-sectional studies suggest pre-treatment correlation between infection intensity and risk for Schistosoma-related pathology. However, evidence also suggests that post-treatment reduction in intensity may not reverse morbidity because some morbidities occur at all levels of infection, and some reflect permanent tissue damage. The aim of this project was to systematically review evidence on drug-based control of schistosomiasis and to develop a quantitative estimate of the impact of post-treatment reductions in infection intensity on prevalence of infection-associated morbidity...
February 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28178298/the-impact-of-prenatal-exposure-to-parasitic-infections-and-to-anthelminthic-treatment-on-antibody-responses-to-routine-immunisations-given-in-infancy-secondary-analysis-of-a-randomised-controlled-trial
#10
Stephen Nash, Alexander J Mentzer, Swaib A Lule, Dennison Kizito, Gaby Smits, Fiona R M van der Klis, Alison M Elliott
BACKGROUND: Chronic parasitic infections are associated with active immunomodulation which may include by-stander effects on unrelated antigens. It has been suggested that pre-natal exposure to parasitic infections in the mother impacts immunological development in the fetus and hence the offspring's response to vaccines, and that control of parasitic infection among pregnant women will therefore be beneficial. METHODOLOGY/PRINCIPAL FINDINGS: We used new data from the Entebbe Mother and Baby Study, a trial of anthelminthic treatment during pregnancy conducted in Uganda, to further investigate this hypothesis...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28174906/efficacy-and-safety-of-praziquantel-against-light-infections-of-opisthorchis-viverrini-a-randomized-parallel-single-blind-dose-ranging-trial
#11
Somphou Sayasone, Isabel Meister, Jason R Andrews, Peter Odermatt, Youthanavanh Vonghachack, Syda Xayavong, Kanpaseuth Senggnam, Khampheng Phongluxa, Jan Hattendorf, Isaac I Bogoch, Jennifer Keiser
No abstract text is available yet for this article.
February 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28155758/-introduction-the-advent-of-diama-and-manantali-dams-in-the-eighties-has-altered-the-schistosomiasis-profile-in-the-senegal-river-basin-with-the-appearance-of-an-intestinal-form-in-the-delta-and-a-high-prevalence-of-the-urinary-form-in-all-ecological-areas
#12
Moussa Abdellahi, Oumar Ndir, Saidou Niang
The results of this study confirm that schistosomiasis is still a public health problem in the Senegal River Basin despite several series of mass praziquantel 600 mg administration. This situation requires detailed reflection concerning dosing frequencies of this drug in the Senegal River basin and the need to take social behaviours and sociological realities into account in order to eradicate schistosomiasis.</ce:para>.
October 19, 2016: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
https://www.readbyqxmd.com/read/28143543/efficacy-of-nitazoxanide-to-treat-natural-giardia-infections-in-dogs
#13
Mario Moron-Soto, Lilia Gutierrez, Héctor Sumano, Graciela Tapia, Yazmin Alcala-Canto
BACKGROUND: Giardia parasites cause gastrointestinal disease in humans, dogs, and many other animals worldwide. The treatment of dogs for giardiasis requires further investigation to ascertain levels of drug efficacy and the possibility of adverse side effects. Nitazoxanide (NTZ) has shown good clinical anti-Giardia activity in humans, yet it has not been evaluated for the treatment of giardiasis in dogs. METHODS: Thirty-five dogs, naturally infected with Giardia were divided into five groups (n = 7): dogs in group NTZ1, NTZ2, and NTZ3 were treated with a single oral dose of 37...
January 31, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28131660/light-and-scanning-electron-microscopy-study-of-in%C3%A2-vitro-effects-of-artesunate-in-newly-excysted-metacercariae-of-echinostoma-paraensei-trematoda-digenea
#14
Joyce G R Souza, Eduardo J Lopes Torres, Juberlan S Garcia, Ana Paula N Gomes, Rosangela Rodrigues-Silva, Arnaldo Maldonado, José Roberto Machado-Silva
Chemotherapy of food-borne trematodes relies on two drugs, praziquantel and tricabendazole, and there is growing interest in finding alternative therapies. Plant oil extracts have long been used in traditional Chinese medicine as sources of bioactive compounds with antiparasitic activity. Species of the genus Echinostoma are used as good models to test effective compounds against food-borne trematodes. This study evaluated the anthelmintic activity of crude artesunate extracts in vitro on newly excysted metacercariae of Echinostoma paraensei by light and scanning electron microscopy (SEM)...
January 25, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28126674/synergistic-effects-of-in-vitro-combinations-of-piplartine-epiisopiloturine-and-praziquantel-against-schistosoma-mansoni
#15
Yuri Dias Macedo Campelo, Ana Carolina Mafud, Leiz Maria Costa Véras, Maria Adelaide Guimarães, Lydia F Yamaguchi, David Fernandes Lima, Daniel Dias Rufino Arcanjo, Massuo J Kato, Ronaldo Z Mendonça, Pedro Luiz Silva Pinto, Yvonne Primerano Mascarenhas, Marcos P N Silva, Josué de Moraes, Peter Eaton, José Roberto de Souza de Almeida Leite
Schistosomiasis is a world health problem, and praziquantel is the only drug currently used for the treatment. There is some evidence that extensive monotherapy of praziquantel may be leading to drug resistance in the parasite. In order to find alternative treatments, the effects of the combination of epiisopiloturine (EPI), piplartine (PPT) and praziquantel (PZQ) were evaluated. Similarity analysis of these compounds was performed using optimized molecular structures to compare the shape and the charge modeling of combinations between PZQ and EPI or PPT...
January 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28126024/efficacy-and-safety-of-praziquantel-40%C3%A2-mg-kg-in-preschool-aged-and-school-aged-children-a-meta-analysis
#16
REVIEW
Julien Zwang, Piero Olliaro
BACKGROUND: Children carry most of the schistosomiasis burden. While school-aged children are the principal target group of preventive chemotherapy with praziquantel, limited information on efficacy and safety exists for preschool-aged children. METHODS: Here, we conducted a meta-analysis of clinical trials of praziquantel for treating children with any form of schistosomiasis. Efficacy was reported as cure rate (CR) and egg reduction rates (ERR); statistical corrections were applied based on methodological disparities across trials to derive the predicted geometrical mean ERR (pERRgm)...
January 26, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28105582/-control-of-opisthorchis-viverrini-infection-for-cholangiocarcinoma-prevention
#17
Y Buisson
The International Agency for Research on Cancer (IARC) has classified two liver flukes as carcinogenic to humans (Group 1): Opisthorchis viverrini in 1994 and Clonorchis sinensis in 2009. This review is focused on O. viverrini, the most studied of these two trematodes, which infects nearly 10 million people in Southeast Asia. The life cycle involves two intermediate hosts living in fresh water: a snail of the genus Bithynia and a ciprinid fish. The definitive hosts (human, cat, dog) become infected by ingesting raw fish containing metacercariae, the infective stage of the parasite...
January 19, 2017: Bulletin de la Société de Pathologie Exotique
https://www.readbyqxmd.com/read/28103771/structure-based-study-of-natural-products-with-anti-schistosoma-activity
#18
Ibezim Akachukwu, Olujide Oludayo Olubiyi, Ata Kosisochukwu, Mbah Chika John, Nwodo Ngozi Justina
: Background Schistosomiasis is a parasitic protozoal disease caused by flatworms of the genus Schistosoma. Although the disease threatens millions of lives, it is still at the top list of neglected tropical diseases and praziquantel, the only common schistosocidal drug in use, has records of decreasing efficiency and cases of resistance. Also, reports revealed that people in the rural areas, who are most affected, rely mostly on traditional herbal medicines because of limited access to modern healthcare...
January 19, 2017: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/28094201/diagnosing-urogenital-schistosomiasis-dealing-with-diminishing-returns
#19
REVIEW
Loc Le, Michael H Hsieh
Urogenital schistosomiasis, caused by Schistosoma haematobium, is the most prevalent form of schistosomiasis affecting humans, and can result in severe bladder, kidney, ureteral, and genital pathologies. Chronic infection with S. haematobium has been linked with bladder cancer and increased risk for HIV infection. As mass drug administration with praziquantel increases in an attempt to transition from control to elimination of schistosomiasis, the need for updated, more sensitive diagnostic tools becomes more apparent, especially for use in areas of low infection intensity and for individuals with light infections...
January 13, 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/28092854/biopharmaceutical-characterization-of-praziquantel-cocrystals-and-cyclodextrin-complexes-prepared-by-grinding
#20
Martina Cugovčan, Jasna Jablan, Jasmina Lovrić, Dominik Cinčić, Nives Galić, Mario Jug
Mechanochemical activation using several different co-grinding additives was applied as a green chemistry approach to improve physiochemical and biopharmaceutical properties of praziquantel (PZQ). Liquid assisted grinding with an equimolar amount of citric acid (CA), malic acid (MA), salicylic acid (SA) and tartaric acid (TA) gained in cocrystal formation, which all showed pH-dependent solubility and dissolution rate. However, the most soluble cocrystal of PZQ with MA was chemically unstable, as seen during the stability testing...
January 10, 2017: Journal of Pharmaceutical and Biomedical Analysis
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