Abstract:
:We compared in vitro and in vivo induction of IL-12 (p40) and IFN-gamma by mouse cells stimulated with Toxoplasma gondii, Trypanosoma cruzi, and different species of Leishmania. Spleen cells cultured in vitro with T. cruzi or T. gondii, but not with Leishmania, produced IL-12 (p40) and IFN-gamma. Accordingly, IL-12 (p40) was produced by macrophages stimulated in vitro with live T. cruzi or T. gondii or membrane glycoconjugates obtained from trypomastigotes or tachyzoites. No IL-12 production was detected when macrophages were stimulated with live parasites or glycoconjugates from Leishmania, regardless of priming with IFN-gamma. In vivo, only T. cruzi and T. gondii induced the synthesis of IL-12 and IFN-gamma by mouse spleen cells after intraperitoneal injection of parasites. When injected subcutaneously, live Leishmania sp. induced IL-12 (p40) and IFN-gamma production by draining lymph node cells, albeit the levels were slightly lower than those induced by infection with T. gondii or T. cruzi using the same route. Together our results indicate that under different conditions, the intracellular protozoa T. gondii and T. cruzi are more potent stimulators of IL-12 and IFN-gamma synthesis by host immune cells than parasites of the genus Leishmania.
journal_name
Exp Parasitoljournal_title
Experimental parasitologyauthors
Oliveira MA,Santiago HC,Lisboa CR,Ceravollo IP,Trinchieri G,Gazzinelli RT,Vieira LQdoi
10.1006/expr.2000.4523keywords:
subject
Has Abstractpub_date
2000-06-01 00:00:00pages
96-105issue
2eissn
0014-4894issn
1090-2449pii
S0014-4894(00)94523-5journal_volume
95pub_type
杂志文章abstract::This article describes a sensitive, cheap, and easy method for assaying chemotaxic responses of Leishmania promastigotes. A gradient of the substance to be assayed was produced inside a series of commercially available capillary tubes submerged in a promastigote suspension. After an incubation period, the attractivene...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1006/expr.2000.4569
更新日期:2000-11-01 00:00:00
abstract::Amebiasis contributes to approximately 50 million cases of life-threatening dysentery worldwide. Comparison of the lectins from Entamoeba histolytica (pathogenic) and Entamoeba dispar (nonpathogenic) was undertaken to elucidate the differential roles of this molecule in invasion versus colonization. Surface lectin was...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1006/expr.2001.4672
更新日期:2001-12-01 00:00:00
abstract::Previously generated two auxotrophic genes knockout Edwardsiella tarda (Δalr Δasd E. tarda) was used as a delivery vehicle for CpG 1668 motif-enriched plasmids (pL-CpG30), and potential of the Δalr Δasd E. tarda-mediated delivery of CpG motifs in both prevention and therapeutic treatment of scuticociliatosis caused by...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2014.06.007
更新日期:2014-09-01 00:00:00
abstract::Activation of the hypothalamus-pituitary-adrenal axis plays a major role in the suppression of the immune system. We have investigated the effects of repetitive stress on Wistar rats infected with the Y strain of Trypanosoma cruzi and a control group that underwent stressor stimuli by exposure to ether vapor for one m...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2005.03.009
更新日期:2005-06-01 00:00:00
abstract::In the present study, the gene expression of three multidrug resistance (MDR) and resistance-associated protein (MRP) transport proteins or efflux pumps was characterized and the phenotypic evidence for such pumps was demonstrated in cultured Madin-Darby canine kidney (MDCK) cells. A gradient for the fluorescent probe...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2004.03.012
更新日期:2004-03-01 00:00:00
abstract::Extracting genomic DNA of pathogenic agents from formalin-fixed specimens is inherently difficult. Storage of samples in formalin results in nucleic acid cross-linking and DNA fragmentation. In this study, DNA was extracted from 45 Giardia-positive stool samples stored in formalin and subjected to PCR amplification ta...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2019.01.010
更新日期:2019-03-01 00:00:00
abstract::Fasciolosis caused by Fasciola hepatica and Fasciola gigantica (Platyhelminthes: Trematoda: Digenea) is considered the most important helminth infection of ruminants in tropical countries, causing considerable socioeconomic problems. From Africa, F. gigantica has been previously characterized from Burkina Faso, Senega...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.07.002
更新日期:2011-10-01 00:00:00
abstract::Infective larvae of Strongyloides spp. have been shown to contain azocollytic enzymes which may aid in host skin penetration. Attempts to demonstrate classical, neutral pH-active collagenase activity in Strongyloides ratti were unsuccessful. In the current study, we investigated the presence of acidic collagenolytic a...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(87)90037-3
更新日期:1987-12-01 00:00:00
abstract::Entamoeba histolytica programmed cell death (PCD) induced by G418 is characterized by the release of important amounts of intracellular calcium from reservoirs. Nevertheless, no typical caspases have been detected in the parasite, the PCD phenotype is inhibited by the cysteine protease inhibitor E-64. These results st...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2015.10.005
更新日期:2015-12-01 00:00:00
abstract::To understand the genetic basis of virulence, gene expression profiles of a temperature-sensitive clone (NCts-8, relatively avirulent) and its wild type (NC-1) of Neospora caninum were characterized and compared using a high-density microarray with approximately 63,000 distinct oligonucleotides. This microarray consis...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.09.007
更新日期:2011-12-01 00:00:00
abstract::Acanthamoeba infections cause serious humans diseases, such as amoebic keratitis and granulomatous amoebic encephalitis. Melaleuca essential oil has been reported to be effective in treating bacterial and fungal infections. However, the anti-parasitic effects of this essential oil are not well studied. In the present ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2017.10.014
更新日期:2017-12-01 00:00:00
abstract::Human cysticercosis caused by Taenia crassiceps is unusual; however, it is an useful experimental model for cysticercosis studies. Benzimidazole derivatives are important antihelminthic drugs widely used against helminths. A novel compound 6-chloro-5-(1-naphthyloxy) -2-(trifluoromethyl)-1H-benzimidazole (RCB20) is a b...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2016.11.002
更新日期:2017-01-01 00:00:00
abstract::Living Leishmania amazonensis amastigotes were incubated with radioiodinated N-benzyloxycarbonyl-L-tyrosyl-L-alanyl diazomethane (Z-Tyr-AlaCHN2), an irreversible inhibitor of mammalian cathepsins B and L. Parasite lysates were subjected to electrophoresis in gelatin-containing sodium dodecyl sulfate-acrylamide gels to...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(91)90066-6
更新日期:1991-11-01 00:00:00
abstract::This study was designed to determine the effects of age and the role of spleen in rats with heavy Angiostrongylus cantonensis infection. Young rats (8 weeks) infected with 100 larvae were found to have significantly higher worm recovery rate (75.0±6.6%) than the adult (6 months) (55.7±1.5%) and the aging ones (13 mont...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2012.04.004
更新日期:2012-06-01 00:00:00
abstract::The largest obstacle impeding the development of an effective malaria vaccine is the incomplete understanding of how the immune response is regulated during infection. B-1a cells, a poorly understood subcategory of B lymphocytes, produce nonpathologic autoantibodies of low affinity which have been shown to have distin...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1006/expr.2001.4622
更新日期:2001-06-01 00:00:00
abstract::Spent mushroom compost (SMC) is a residue generated in edible mushrooms production, such as Hypsizygus marmoreus. Its genome was recently sequenced, demonstrating cuticle-degrading protease genes. The present work aims to investigate the proteases from H. marmoreus spent mushroom compost (SMC) by verifying its action ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2018.12.006
更新日期:2019-02-01 00:00:00
abstract::Immunoelectron microscopy demonstrated the presence of Pf155/RESA in dense granules of Plasmodium falciparum merozoites rather than in micronemes as previously suggested. Since the dense granules are released after the merozoite enters the parasitophorous vacuole, the role of Pf155/RESA in invasion and subsequent step...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(90)90037-d
更新日期:1990-10-01 00:00:00
abstract::Chromosome-sized DNA molecules from Trypanosoma cruzi clone Dm 28c were analyzed and compared with other T. cruzi strains and monogenetic trypanosomatids by orthogonal field alteration gel electrophoresis. The results showed that T. cruzi Dm 28c displays at least 18 chromosomes ranging from 550 to more than 1500 kb an...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(89)90178-1
更新日期:1989-08-01 00:00:00
abstract::Considering that the treatment for toxoplasmosis is based on drugs that show limited efficacy due to their substantial side effects, the purpose of the present study was to evaluate the effects of Artemisia annua on in vitro and in vivo Toxoplasma gondii infection. A. annua infusion was prepared from dried herb and te...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2009.04.010
更新日期:2009-07-01 00:00:00
abstract::To better control gastrointestinal nematode infections in humans and animals, it is important to understand the strategies used by these parasites to modulate the host immune system. In this regard, molecules released by parasites have been attributed crucially important roles in host-parasite negotiations. We charact...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2017.05.003
更新日期:2017-07-01 00:00:00
abstract::Under a variety of stress conditions, Leishmania species display some morphological and biochemical features characteristic of mammalian programmed cell death or necrosis. Nitroheteroaryl-1,3,4-thiadiazoles induce cell death in Leishmania major (L. major). Putative mechanisms of action of these compounds were investig...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2012.06.002
更新日期:2012-10-01 00:00:00
abstract::Although macrophages have a microbicidal role in the immune system they themselves can be infected by pathogens. Often a simultaneous infection by more than one microbe may occur in a single cell. This is the first report of coinfection of macrophages with Toxoplasma gondii and Leishmania infantum, in vitro and in viv...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.02.022
更新日期:2011-07-01 00:00:00
abstract::Previous results from our laboratory using pharmacological approaches suggested a role for nitric oxide (NO) in the host defense against the human filarial parasite, Brugia malayi. We sought to determine whether a complementary genetic approach, using mice homozygous for a targeted mutation in the gene encoding induci...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1006/expr.2001.4611
更新日期:2001-05-01 00:00:00
abstract::A monoclonal antibody specific for the Theileria parva sporozoite, which recognizes a determinant on the surface coat and blocks sporozoite infectivity, was used to investigate the presence of the determinant on other stages of the parasite lifecycle. Immunofluorescence techniques did not demonstrate this determinant ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/s0014-4894(85)80026-6
更新日期:1985-08-01 00:00:00
abstract::The petroleum ether extract of neem oil and its four fractions separated by column chromatography was diluted at different concentrations with liquid paraffin. The acaricidal bioassay was conducted using a dipping method. The results indicated that the median lethal concentration (LC50) of the petroleum ether extract ...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2012.02.007
更新日期:2012-04-01 00:00:00
abstract::The extracellular metalloproteinases of the insect trypanosomatid Crithidia guilhermei were characterized through the incorporation of different protein substrates (gelatin, casein, haemoglobin, and bovine serum albumin) into SDS-PAGE. Two gelatinases (60 and 80 kDa) showed ability to degrade casein as well and a 67-k...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/s0014-4894(03)00037-7
更新日期:2002-11-01 00:00:00
abstract::Chemoattraction studies were done with Schistosoma mansoni adults from mice. To test for attraction or repulsion, some worm pairs were separated mechanically and the individuals placed in polycarbonate chambers. Experiments were done at 37 C and chambers contained dialysis tube chimneys. In all cases, heterosexual att...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(83)90070-x
更新日期:1983-10-01 00:00:00
abstract::Ticks are obligate blood-sucking ectoparasites of a wide range of vertebrates. They can transmit a range of pathogens that cause economic losses to livestock production as well as human disease. In the present study, the complete mitochondrial (mt) genome of Dermacentor silvarum was determined. The mt genome is 14,945...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2016.07.004
更新日期:2016-10-01 00:00:00
abstract::Exponential weight gain equations and growth rates were determined during larval development of Brachymeria lasus reared aseptically on chemically defined media with varying amino acid and glucose levels. The rate of weight gain increased from 0 to 2% dietary glucose and mean growth rate increased from 160 to 260 micr...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/0014-4894(83)90028-0
更新日期:1983-06-01 00:00:00
abstract::Toxoplasma gondii is an intra-cellular parasite that infects humans through vertical and horizontal transmission. The cysts remain dormant in the brain of infected humans and can reactivate in immunocompromised hosts resulting in acute toxoplasmic encephalitis which may be fatal. We determined the onset and progressio...
journal_title:Experimental parasitology
pub_type: 杂志文章
doi:10.1016/j.exppara.2011.10.004
更新日期:2012-01-01 00:00:00