Abstract：
:Cercariae of Schistosoma mansoni produce a wide variety of eicosanoids when stimulated by 3.3 mM linoleate. High-performance liquid chromatography indicated that 10(-5) M esculetin dramatically decreased eicosanoid production by cercariae. Ibuprofen (10(-4) M) also decreased eicosanoid production, but to a lesser extent. These results were confirmed by radioimmunoassay using time-dose curves for esculetin and time curves for ibuprofen. The results reported here indicated that, for cercariae, ibuprofen was neither a specific cyclo-oxygenase inhibitor, as has been reported for platelet and endothelial cells, nor was esculetin a specific inhibitor of lipoxygenase, as has been reported for platelets and mastocytoma cells. Rather, both drugs inhibited cyclo-oxygenase and lipoxygenase enzyme systems. Further, the data indicated that two forms of cyclo-oxygenase exist in cercariae (isozymes?), one initiating the conversion of gamma-dihomolinolenate into the 1-series prostaglandins and another acting on arachidonate forming the 2-series prostaglandins. The cyclo-oxygenase acting on arachidonate has a greater sensitivity to both ibuprofen and esculetin than the enzyme acting on gamma-dihomolinolenate. Cercarial lipoxygenases also varied greatly in their sensitivity to ibuprofen.
journal_name
Exp Parasitoljournal_title
Experimental parasitologyauthors
Salafsky B,Fusco ACdoi
10.1016/s0014-4894(85)80024-2subject
Has Abstractpub_date
1985-08-01 00:00:00pages
73-81issue
1eissn
0014-4894issn
1090-2449pii
S0014-4894(85)80024-2journal_volume
60pub_type
杂志文章abstract：:Only two drugs are currently available for the treatment of Chagas disease and their effectiveness are unsatisfactory. Photorhabdus luminescens and Xenorhabdus nematophila, two enteric bacteria highly pathogenic to a broad range of insects, have been studied as potential source for bioactive metabolites against protoz...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2019.107724
更新日期：2019-09-01 00:00:00
abstract：:Antimony unresponsiveness in mucocutaneous and visceral leishmaniasis is a serious clinical problem. Information on the mechanisms and characteristics of drug resistance in parasites that suggest chemotherapeutic strategies to overcome resistance is of practical importance. We developed nine lines of Leishmania resist...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(89)90173-2
更新日期：1989-07-01 00:00:00
abstract：:In an attempt to identify the tissue sources of biochemically purified antigenic fractions of Fasciola hepatica and Schistosoma mansoni, antisera were tested against plastic-embedded sections of worms of various ages by an indirect fluorescent-antibody-labeling technique. Antibodies prepared against antigens purified ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(84)90055-9
更新日期：1984-02-01 00:00:00
abstract：:In this study, human sera reactivity against nine peptides derived from the Toxoplasma gondii P30 protein was assessed by ELISA in patients with different clinical forms of toxoplasmosis. Same as has been reported in mice, sera from congenital, ocular and chronic asymptomatic toxoplasmosis patients recognized more str...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.06.017
更新日期：2009-10-01 00:00:00
abstract：:The pathogenesis of chronic schistosomiasis is caused by irritation of the schistosome eggs trapped in liver that induce delayed hypersensitive reactions from the surrounding tissues, leading to the formation of inflammatory granuloma and subsequent fibrosis. A Schistosoma japonicum (S. japonicum) single-chain fragmen...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2013.05.002
更新日期：2013-08-01 00:00:00
abstract：:Betulinic acid is a pentacyclic triterpenoid with several biological properties already described, including antiparasitic activity. Here, the anti-Trypanosoma cruzi activity of betulinic acid and its semi-synthetic amide derivatives (BA1-BA8) was investigated. The anti-Trypanosoma cruzi activity and selectivity were ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2016.04.007
更新日期：2016-07-01 00:00:00
abstract：:Thirty U.S. Trypanosoma cruzi stocks isolated mainly from wild mammals were characterized by multilocus enzyme electrophoresis at 22 genetic loci and random amplification of polymorphic DNA for 10 primers. Two main phylogenetic clusters, separated by large genetic distances, were discriminated by both methods, corresp...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.2001.4651
更新日期：2001-10-01 00:00:00
abstract：:The asexual development cycle of Plasmodium falciparum, a malarial parasite of humans, has been synchronized in culture by treating ring-stage parasites with aphidicolin, an inhibitor of DNA synthesis. Optimization of both the concentration of drug added to ring stage containing red blood cells and the duration of exp...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(84)90061-4
更新日期：1984-02-01 00:00:00
abstract：:The infection with blood stages of Plasmodium chabaudi chabaudi (AS) was followed in BALB/c and DBA/2 mice. Both strains show a peak parasitemia by 7-9 days after infection, display splenic hypercellularity of T and B cells, thymic atrophy, nearly complete depletion of B cells in the bone marrow, and mount comparable ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2005.03.024
更新日期：2005-08-01 00:00:00
abstract：:Toxoplasma gondii is the etiologic agent of toxoplasmosis. Although the combination of sulfadiazine and pyrimethamine is used as therapy for this disease, these drugs can have serious side effects and its use is limited in pregnancy. Therefore there is a need for new anti-T. gondii drugs in the clinic. Some systems fo...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2008.10.006
更新日期：2009-02-01 00:00:00
abstract：:Plasma butyrylcholinesterase (BChE) hydrolyzes ester-containing compounds such as succinylcholine, as well as acting as a scavenger against neurotoxic organophosphates (OPs). We previously found that Nippostrongylus brasiliensis infection makes rats more susceptible to OP toxicity by decreasing serum paraoxonase-1 (PO...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.02.009
更新日期：2009-06-01 00:00:00
abstract：:Like most intracellular pathogens, the apicomplexan parasites Besnoitia besnoiti, Toxoplasma gondii and Neospora caninum scavenge metabolites from their host cells. Recruitment of the Golgi complex to the vicinity of the parasitophorous vacuole (PV) is likely to aid in this process. In this work, we comparatively asse...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2018.02.008
更新日期：2018-04-01 00:00:00
abstract：:Entomopathogenic nematodes complete their life cycles inside dead insects. The emergence of new infective juveniles from the cadaver has been attributed (but never demonstrated) to food depletion or to the accumulation of metabolites from the breakdown of the host's tissues. Here we give evidence that emergence is tri...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2008.01.008
更新日期：2008-05-01 00:00:00
abstract：:Schistosomiasis remains a global health problem. In the Mekong river basin, approximately 80,000 people are at risk of infection by Schistosoma mekongi. The parasite's eggs become entrapped in the host's organs and induce massive inflammation, contributing to the pathogenesis of schistosomiasis. In addition, egg antig...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2018.07.002
更新日期：2018-08-01 00:00:00
abstract：:Both the Weybridge strain and a mixture of six laboratory and field strains of Eimeria maxima have been attenuated by selection for early maturation of oocysts during serial passage in chickens. The prepatent times of the resultant precocious lines produces after selection were reduced from approximately 120 hr to les...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(86)90152-9
更新日期：1986-04-01 00:00:00
abstract：: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 Echinost...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2017.01.003
更新日期：2017-03-01 00:00:00
abstract：:Leishmaniasis, a neglected tropical disease (NTD) causes major health problems in the tropical and subtropical world. Most of the antileishmanial modern therapies with different formulations of pentavalent antimonials, Miltefosine, Amphotericin B etc. are not satisfactory in recent times due to high toxicity to the ho...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2014.08.009
更新日期：2014-11-01 00:00:00
abstract：:Pyruvate kinase (PK; EC 2.7.1.40) and phosphoenolpyruvate carboxykinase (PEPCK; EC 4.1.1.32) are essential regulatory enzymes of glucose oxidation in helminths, the PK/PEPCK branch point being the first divergent step between carbohydrate catabolism of the parasites and their hosts. Recently, PEPCK from the cestode pa...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2015.03.023
更新日期：2015-06-01 00:00:00
abstract：:We studied the effects of tick saliva on cell migration, cell signaling, phagocytosis, and gene expression in the murine macrophage cell line, IC-21. Saliva increased both basal- and platelet-derived growth factor (PDGF)-stimulated migration in IC-21 cells. However, saliva did not affect PDGF-stimulated extracellular ...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2010.11.012
更新日期：2011-03-01 00:00:00
abstract：:Ninety-one Chilean, 15 Bolivian, and 9 Argentinian Trypanosoma cruzi stocks, isolated from various hosts and vectors, were characterized by schizodeme analysis with EcoRI and MspI endonucleases. The three major similar pattern groups that emerged from this sample correlated with results of isoenzyme analysis. This res...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(92)90178-d
更新日期：1992-09-01 00:00:00
abstract：:Acquisition of iron from lactoferrin and transferrin by a parasitic protozoon Tritrichomonas foetus has been studied in vitro. Specific, time-dependent, and saturable binding of iodinated ligands to the outer membrane of T. foetus at 4 degrees C was demonstrated for 125I-labeled lactoferrin only. About 1.7 x 10(5) bin...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.1996.0068
更新日期：1996-07-01 00:00:00
abstract：:A new method for measuring the size of parasites and other objects using optical microscopy was developed using a specifically designed movable computer ruler (MCR) derived from digital images of a stage micrometer. Subsequently, MCR can be superimposed on images of parasites to measure their size. MCR derived from th...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2011.10.008
更新日期：2012-01-01 00:00:00
abstract：:Though parasite cyclophilins are promising new drug targets, Eimeria tenella cyclophilins have not been characterized yet. Here, we describe an 89kDa cyclophilin, designated EtCYP89. It is expressed throughout the developmental cycle of E. tenella, both in the intracellular stages in chicken and in extracellular sporu...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2007.07.013
更新日期：2008-02-01 00:00:00
abstract：:Standardization of the methods for extraction of DNA from sand flies is essential for obtaining high efficiency during subsequent molecular analyses, such as the new sequencing methods. Information obtained using these methods may contribute substantially to taxonomic, evolutionary, and eco-epidemiological studies. Th...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2017.04.010
更新日期：2017-06-01 00:00:00
abstract：:Giardia lamblia undergo surface antigenic variation in vitro and in vivo. The presence of variant trophozoites can be detected in clones after exposure to cytotoxic monoclonal antibodies. Surviving Giardia (progeny) no longer possess the initial major surface antigen which is replaced by new antigens. Exposure of a cl...
journal_title：Experimental parasitology
pub_type： 杂志文章,评审
doi：10.1016/0014-4894(89)90104-5
更新日期：1989-02-01 00:00:00
abstract：:The schistosomicidal activity of praziquantel (PZQ) is accompanied by a large influx of calcium into the worms, suggesting that this phenomenon could be the source of the observed muscular contraction, surface disruption and eventual death of the parasite. We have incubated live adult schistosomes in a medium containi...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2008.03.012
更新日期：2008-07-01 00:00:00
abstract：:Clonorchis sinensis is a fish-borne trematode endemic to East Asia, which infects over 35 million people globally. In the study described here, we developed a nested polymerase chain reaction (PCR) method for the specific and reliable detection of C. sinensis. The primers designed from the nucleotide sequence data der...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2006.09.010
更新日期：2007-03-01 00:00:00
abstract：:Acanthamoeba spp., known to cause keratitis and granulomatous encephalitis in humans, are frequently isolated from a variety of water sources. Here we report for the first time the characterization of an Acanthamoeba sp. (ACC01) isolated from tap water in Brazil. This organism is currently being maintained in an axeni...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.07.006
更新日期：2009-11-01 00:00:00
abstract：:Entamoeba histolytica infection is associated with considerable morbidity and mortality in the form of intestinal and extraintestinal amoebiasis. No vaccine is yet available for amoebiasis. Heparan Sulphate Binding Proteins (HSBPs) from E. histolytica were evaluated for immunogenicity and protective efficacy in a Guin...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2013.08.011
更新日期：2013-11-01 00:00:00
abstract：:One- and two-dimensional gel electrophoresis of the solubilized mitochondrial proteins of bloodstream and procyclic trypomastigote Trypanosoma brucei rhodesiense and radiolabeling of proteins in the presence of cycloheximide were used to identify proteins synthesized in the trypanosome mitochondrion. The proteins whic...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/0014-4894(86)90011-1
更新日期：1986-08-01 00:00:00
