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https://www.readbyqxmd.com/read/28342672/an-in-vitro-larval-migration-assay-for-assessing-anthelmintic-activity-of-different-drug-classes-against-ascaris-suum
#1
Jianguo Zhao, Andrew R Williams, Tina Vicky Alstrup Hansen, Stig M Thamsborg, Jianping Cai, Shuaibao Song, Gang Chen, Ming Kang, Zhuangzhi Zhang, Qun Liu, Qian Han
In vitro methods have been developed for the detection of anthelmintic resistance in a range of nematode species. However, the life cycle of Ascaris suum renders the commonly used egg hatch assay and larval development assay unusable. In this study we developed a combined multi-well culture and agar gel larval migration assay to test the effect of benzimidazole and tetrahydropyrimidin/imidazothiazole anthelmintics against nine isolates of A. suum collected from locations in China and Denmark. Drugs tested were thiabendazole, fenbendazole, mebendazole, levamisole, and pyrantel...
March 18, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28340473/enantiomers-of-triclabendazole-sulfoxide-analytical-and-semipreparative-hplc-separation-absolute-configuration-assignment-and-transformation-into-sodium-salt
#2
Rosella Ferretti, Simone Carradori, Paolo Guglielmi, Marco Pierini, Adriano Casulli, Roberto Cirilli
Direct HPLC separation of the enantiomers of triclabendazole sulfoxide (TCBZ-SO), which is the main metabolite of the anthelmintic drug triclabendazole, was carried out using the polysaccharide-based Chiralpak AS-H and Chiralpak IF-3 chiral stationary phases (CSPs). The chromatographic behaviour of both CSPs was evaluated and compared using normal-phase and reversed-phase eluents at different column temperatures. The eluent mixture of n-hexane-2-propanol-trifluoroacetic acid 70:30:0.1 (v/v/v) and a column temperature of 40°C were identified as the best operational conditions to carry out semipreparative enantioseparations on a 1-cm I...
March 16, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28330485/prevalence-of-helminth-and-coccidian-parasites-in-swedish-outdoor-cats-and-the-first-report-of-aelurostrongylus-abstrusus-in-sweden-a-coprological-investigation
#3
Giulio Grandi, Arianna Comin, Osama Ibrahim, Roland Schaper, Ulrika Forshell, Eva Osterman Lind
BACKGROUND: This study was performed in order to gather recent epidemiological data on feline endoparasites in Swedish cats. Faecal samples from 205 outdoor cats were collected by their owners and submitted to the National Veterinary Institute for analysis. The study population was comprised of cats with access to an outdoor environment and with no history of anthelmintic treatment within the last 3 months. Intestinal parasites were detected with a centrifugal flotation technique and Baermann larval sedimentation was performed to detect metastrongylid lungworms...
March 23, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28316426/genotyping-of-benzimidazole-resistant-and-susceptible-isolates-of-haemonchus-contortus-from-sheep-by-allele-specific-pcr
#4
Karthik Mohanraj, Subhra Subhadra, Aravindan Kalyanasundaram, Manikkavasagan Ilangopathy, Muthusamy Raman
Extensive and indiscriminate use of the benzimidazole class of drugs has led to the onset of anthelmintic resistance. In tropical countries like India, Haemonchus contortus is the most pathogenic parasite infecting sheep and goats. The widespread presence of resistant helminths (especially H. contortus) threatens the livestock farming. The use of various drugs has led to single nucleotide polymorphism that causes specific amino acid substitutions in β-tubulin protein of H. contortus to confer resistance. This emphasizes the need for a survey on the present status of resistance in India...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28316404/senna-alexandrina-mill-induced-ultrastructural-changes-on-hymenolepis-diminuta
#5
S Kundu, S Roy, S Nandi, B Ukil, Larisha Mawkhlieng Lyndem
Senna alexandrina Mill. has been used for antimicrobial activity. In the present study, the crude ethanolic extract of the plant and a synthetic compound Sennoside were tested in vitro on Hymenolepis diminuta to evaluate its potential anthelmintic efficacy through ultrastructural changes. Worms were maintained between rat model and beetle and the test parasites were exposed to different concentrations of crude ethanolic leaf extracts of S. alexandrina. Praziquantel was used as a reference drug. Dose dependent efficacy was observed in terms of motility and time of mortality in all treated parasites...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28316382/effect-of-punica-granatum-fruit-peel-on-glucose-6-phosphate-dehydrogenase-and-malate-dehydrogenase-in-amphistome-gastrothylax-indicus
#6
Rama Aggarwal, Upma Bagai
Increasing anthelmintic resistance and the impact of conventional anthelmintics on the environment, it is important to look for alternative strategies against helminth parasite in sheep. Important lipogenic enzymes like glucose-6-phosphate dehydrogenase (G-6-PDH) and malate dehydrogenase (MDH) show subcellular distribution pattern. Activity of G-6-PDH was largely restricted to cytosolic fraction while MDH was found in both cytosolic and mitochondrial fraction in Gastrothylax indicus. Following in vitro treatment with ethanolic and aqueous extracts of Punica granatum fruit peel and commercial anthelmintic, albendazole G-6-PDH activity was decreased by 19-32 %, whereas MDH was suppressed by 24-41 %, compared to the respective control...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28316381/in-vitro-evaluation-of-antifilarial-effect-of-azadirachta-indica-leaves-extract-in-different-solvents-on-the-microfilariae-of-setaria-cervi
#7
Sharba Kausar
Polar solvent extracts of Azadirachta indica leaves were investigated to evaluate in vitro anthelmintic activity on the microfilariae of Setaria cervi. Four extracts of A. indica leaves were prepared with different solvents in increasing order of polarity (diethyl ether < chloroform < ethanol < methanol). Stock solution of the extract of A. indica leaves was prepared in Ringer's solution at the concentrations of 50, 100 and 200 μg/ml and used against microfilariae in three replicates. Ringer's solution was used as experimental control...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28316380/integrated-parasite-management-with-special-reference-to-gastro-intestinal-nematodes
#8
REVIEW
I Maqbool, Z A Wani, R A Shahardar, I M Allaie, M M Shah
Domestic animals are susceptible to a large number of parasitic diseases, which lead to severe economic losses to livestock industry. So, it is necessary to control parasitic infections in these animals. Control of these helminths is undertaken mostly by anthelmintics, but because of their widespread use there is development of resistance across the globe. However, total dependence on a single method of control has proved to be non-sustainable and cost ineffective in the long term. A combination of treatment and management is necessary to control parasitism so that it will not cause further economic losses to producer as well as to livestock industry...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28301809/evaluation-of-drug-uptake-and-deactivation-in-plant-fate-of-albendazole-in-ribwort-plantain-plantago-laceolata-cells-and-regenerants
#9
Lucie Stuchlíková Raisová, Radka Podlipná, Barbora Szotáková, Eliška Syslová, Lenka Skálová
Albendazole (ABZ) is a benzimidazole anthelmintic widely used especially in veterinary medicine. Along with other drugs, anthelmintics have become one of a new class of micro-pollutants that disturb the environment but the information about their fate in plants remains limited. The present study was designed to test the uptake and biotransformation of ABZ in the ribwort plantain (Plantago lancelota), a common meadow plant, which can come into contact with this anthelmintic through the excrements of treated animals in pastures...
March 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28301522/quantification-of-santonin-in-eight-species-of-artemisia-from-kazakhstan-by-means-of-hplc-uv-method-development-and-validation
#10
Zuriyadda Sakipova, Nikki Siu Hai Wong, Tolkyn Bekezhanova, Sadykova, Alma Shukirbekova, Fabio Boylan
Santonin, a powerful anthelmintic drug that was formely used to treat worms, is Artemisia cina's main constituent. However, due to its toxicity to humans, it is no longer in use. Kazakhstan is looking to introduce this plant as an anthelmintic drug for veterinary purposes, despite the known toxic properties of the santonin. The objective of this study was to develop a fast and specific method for the identification of santonin and its precise quantitation using HPLC-UV in order to avoid unnecessary intoxication, which is paramount for the development of veterinary medicines...
2017: PloS One
https://www.readbyqxmd.com/read/28288755/anthelmintic-activity-of-plant-extracts-from-brazilian-savanna
#11
Andreia F Oliveira, Livio M Costa Junior, Aldilene S Lima, Carolina R Silva, Maria N S Ribeiro, José W C Mesquista, Cláudia Q Rocha, Marcelo M P Tangerina, Wagner Vilegas
Helminth infections represent a serious problem for the production of small ruminants that is currently aggravated by resistance to anthelmintic products and has induced a search for control alternatives, such as natural products. In this study, extracts of Turnera ulmifolia L. (leaves and roots), Parkia platycephala Benth. (leaves and seeds) and Dimorphandra gardneriana Tul. (leaves and bark), which have been cited in ethnoveterinary studies and selected naturally by goats in the cerrado (Brazilian savanna), were tested in vitro against Haemonchus contortus...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28288752/encysted-cyathostomin-larvae-in-foals-progression-of-stages-and-the-effect-of-seasonality
#12
Martin K Nielsen, Eugene T Lyons
Cyathostomins (small strongyles) are ubiquitous in grazing horses and are known pathogens as cause of larval cyathostominosis. As part of their life cycle, cyathostomin larvae invade the mucosal walls of the large intestines and undergo encystment. Newly ingested third stage larvae are known to undergo arrested development and this can lead to an accumulation of encysted burdens over the course of a grazing season. It is believed that the host immune system plays a significant role in triggering this arrestment...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28286043/anthelmintic-effect-of-psidium-guajava-and-tagetes-erecta-on-wild-type-and-levamisole-resistant-caenorhabditis-elegans-strains
#13
Denia M Piña-Vazquez, Zyanya Mayoral-Peña, Maricela Gómez-Sánchez, Luis A Salazar-Olivo, Fausto Arellano-Carbajal
ETHNOPHARMACOLOGICAL RELEVANCE: Psidium guajava and Tagetes erecta have been used traditionally to treat gastrointestinal parasites, but their active metabolites and mechanisms of action remain largely unknown. AIM OF THE STUDY: To evaluate the anthelmintic potential of Psidium guajava and Tagetes erecta extracts on Levamisole-sensitive and Levamisole-resistant strains of the model nematode Caenorhabditis elegans. MATERIALS AND METHODS: Aqueous extracts of Psidium guajava (PGE) and Tagetes erecta (TEE) were assayed on locomotion and egg-laying behaviors of the wild-type (N2) and Levamisole-resistant (CB193) strains of Caenorhabditis elegans...
March 7, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28285891/effect-of-fenbendazole-in-water-on-pigs-infected-with-ascaris-suum-in-finishing-pigs-under-field-conditions
#14
Brian Lassen, Claudio Oliviero, Toomas Orro, Elias Jukola, Tapio Laurila, Minna Haimi-Hakala, Mari Heinonen
The husbandry of pigs for meat production is a constantly developing industry. Most studies on the effects of Ascaris suum infection in pigs and its prevention with anthelmintics are over a decade old. We examined the effect of 2.5mg fenbendazole per kg bodyweight administered in drinking water for two consecutive days on A. suum infection 1 and 6 weeks after pigs arrived to fattening units. We hypothesised that the treatment would reduce the presence of A. suum-infections, improve the average daily weight gain of pigs, reduce the percentage of liver rejections in pens by 50% and increase the lean meat percentage at slaughter by 1%...
March 6, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28285880/phenotypic-screening-identifies-modulators-of-amyloid-precursor-protein-processing-in-human-stem-cell-models-of-alzheimer-s-disease
#15
Philip W Brownjohn, James Smith, Erik Portelius, Lutgarde Serneels, Hlin Kvartsberg, Bart De Strooper, Kaj Blennow, Henrik Zetterberg, Frederick J Livesey
Human stem cell models have the potential to provide platforms for phenotypic screens to identify candidate treatments and cellular pathways involved in the pathogenesis of neurodegenerative disorders. Amyloid precursor protein (APP) processing and the accumulation of APP-derived amyloid β (Aβ) peptides are key processes in Alzheimer's disease (AD). We designed a phenotypic small-molecule screen to identify modulators of APP processing in trisomy 21/Down syndrome neurons, a complex genetic model of AD. We identified the avermectins, commonly used as anthelmintics, as compounds that increase the relative production of short Aβ peptides at the expense of longer, potentially more toxic peptides...
March 6, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28284560/computational-discovery-of-niclosamide-ethanolamine-a-repurposed-drug-candidate-that-reduces-growth-of-hepatocellular-carcinoma-cells-in-vitro-and-in-mice-by-inhibiting-cdc37-signaling
#16
Bin Chen, Wei Wei, Li Ma, Bin Yang, Ryan M Gill, Mei-Sze Chua, Atul J Butte, Samuel So
BACKGROUND & AIMS: Drug repositioning offers a shorter approval process than new drug development. We therefore searched large public datasets of drug-induced gene expression signatures to identify agents that might be effective against hepatocellular carcinoma (HCC). METHODS: We searched public databases of mRNA expression patterns reported from HCC specimens from patients, HCC cell lines, and cells exposed to various drugs. We identified drugs that might specifically increase expression of genes that are downregulated in HCCs and reduce expression of genes upregulated in HCCs using a non-parametric, rank-based pattern-matching strategy based on the Kolmogorov-Smirnov statistic...
March 8, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28278127/veterinary-drugs-residues-a-review-of-the-latest-analytical-research-on-sample-preparation-and-lc-ms-based-methods
#17
Lucia Mainero Rocca, Alessandra Gentili, Virginia Pérez-Fernández, Pierpaolo Tomai
The world population is increasing day by day and as a result there is a growing demand for food. Inevitably livestock and crops become intensive and require an increasing use of adjuvants. Even the logic of the extreme profit acts as an engine and often leads to fraudulent use of drugs, pesticides etc. Particularly, veterinary drugs can pose a real risk to human health if their residues are allowed to enter the food chain. Parent drugs and their metabolites can occur in foodstuffs individually or as multicomponent mixtures with enhanced adverse effects...
February 22, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28275906/molecular-modeling-and-infrared-and-raman-spectroscopy-of-the-crystal-structure-of-the-chiral-antiparasitic-drug-praziquantel
#18
Ana Borrego-Sánchez, Alfonso Hernández-Laguna, C Ignacio Sainz-Díaz
Anthelmintic praziquantel (PZQ) and its molecular and crystal lattice structures were studied by means of atomistic calculations based on empirical interatomic potentials and quantum mechanical methods (DFT). This chiral drug presents several crystal polymorphs due to the enantiomers (either R or S) or the racemic crystal, and different molecular conformations. The relative configurations of the carbonyl groups in PZQ define these conformations that produce different polymorphs. The polarity of these conformers is quite different and their relative population can vary in media with different polarity...
April 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28273846/molecular-and-structural-characterization-of-the-tegumental-20-6-kda-protein-in-clonorchis-sinensis-as-a-potential-druggable-target
#19
Yu-Jung Kim, Won Gi Yoo, Myoung-Ro Lee, Jung-Mi Kang, Byoung-Kuk Na, Shin-Hyeong Cho, Mi-Yeoun Park, Jung-Won Ju
The tegument, representing the membrane-bound outer surface of platyhelminth parasites, plays an important role for the regulation of the host immune response and parasite survival. A comprehensive understanding of tegumental proteins can provide drug candidates for use against helminth-associated diseases, such as clonorchiasis caused by the liver fluke Clonorchis sinensis. However, little is known regarding the physicochemical properties of C. sinensis teguments. In this study, a novel 20.6-kDa tegumental protein of the C...
March 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28265572/anthelmintic-resistance-of-strongyle-nematodes-to-ivermectin-and-fenbendazole-on-cart-horses-in-gondar-northwest-ethiopia
#20
Zewdu Seyoum, Alemu Zewdu, Shimelis Dagnachew, Basazinew Bogale
A study was conducted from November 2015 to April 2016 to determine fenbendazole and ivermectin resistance status of intestinal nematodes of cart horses in Gondar, Northwest Ethiopia. Forty-five strongyle infected animals were used for this study. The animals were randomly allocated into three groups (15 horses per group). Group I was treated with fenbendazole and Group II with ivermectin and Group III was left untreated. Faecal samples were collected from each cart horse before and after treatment. Accordingly, the reduction in the mean fecal egg count at fourteen days of treatment for ivermectin and fenbendazole was 97...
2017: BioMed Research International
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