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https://www.readbyqxmd.com/read/28091763/the-prevalence-of-trypanosoma-cruzi-the-causal-agent-of-chagas-disease-in-texas-rodent-populations
#1
Adriana Aleman, Trina Guerra, Troy J Maikis, Matthew T Milholland, Ivan Castro-Arellano, Michael R J Forstner, Dittmar Hahn
Rodent species were assessed as potential hosts of Trypanosoma cruzi, the etiologic agent of Chagas disease, from five sites throughout Texas in sylvan and disturbed habitats. A total of 592 rodents were captured, resulting in a wide taxonomic representation of 11 genera and 15 species. Heart samples of 543 individuals were successfully analyzed by SybrGreen-based quantitative PCR (qPCR) targeting a 166 bp fragment of satellite DNA of T. cruzi. Eight rodents representing six species from six genera and two families were infected with T...
January 13, 2017: EcoHealth
https://www.readbyqxmd.com/read/28089650/neither-quantification-by-qpcr-nor-quantitative-elisa-can-be-used-to-discriminate-angus-cattle-for-resistance-susceptibility-to-babesia-bovis
#2
Rodrigo Giglioti, Henrique Nunes Oliveira, Adriana Mércia Guaratini Ibelli, Talita Barban Bilhassi, Thalita Athiê Néo, Clarissa Helena Santana, Márcio Dias Rabelo, Rosângela Zacarias Machado, Ana Carolina de Souza Chagas, Márcia Cristina de Sena Oliveira
With the aim of finding quantitative phenotypic traits that can be used to discriminate the levels of resistance/susceptibility to Babesia bovis, we estimated the repeatability and correlation between the level of infection, determined by the number of copies of a fragment of the gene that encodes cytochrome B (NC mt-cyB) of B. bovis, and the levels of the anti-B. bovis antibodies, in blood samples collected from 51 Angus cattle on two different occasions. Samples with the anticoagulant EDTA were used for DNA extraction and without anticoagulant for separation of the blood serum...
November 21, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28087471/il-6-promotes-m2-macrophage-polarization-by-modulating-purinergic-signaling-and-regulates-the-lethal-release-of-nitric-oxide-during-trypanosoma-cruzi-infection
#3
Liliana M Sanmarco, Nicolás E Ponce, Laura M Visconti, Natalia Eberhardt, Martin G Theumer, Ángel R Minguez, Maria P Aoki
The production of nitric oxide (NO) is a key defense mechanism against intracellular pathogens but it must be tightly controlled in order to avoid excessive detrimental oxidative stress. In this study we described a novel mechanism through which interleukin (IL)-6 mediates the regulation of NO release induced in response to Trypanosoma cruzi infection. Using a murine model of Chagas disease, we found that, in contrast to C57BL/6 wild type (WT) mice, IL-6-deficient (IL6KO) mice exhibited a dramatic increase in plasma NO levels concomitant with a significantly higher amount of circulating IL-1β and inflammatory monocytes...
January 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28077696/a-new-development-in-trypanosoma-cruzi-diagnosis
#4
Herbert B Tanowitz, Louis M Weiss
Chagas disease caused by the parasite, Trypanosoma cruzi is an important cause of morbidity and mortality in endemic areas of Latin America and among infected individuals who have migrated to non-endemic areas of North America and Europe. There are many diagnostic tests that are employed in the serological diagnosis of this infection. In this issue of the J Clin Microbiol 55: XXX-XXX http://dx.doi:10.1128/JCM.01649-16 by Bautista-López et al provide characterization of excretory vesicles (EV) from Vero cells infected with T...
January 11, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28077331/physiological-behavioral-changes-induced-by-a-fraction-with-antitumor-cleronade-diterpenes-from-an-atlantic-forest-brazilian-plant-and-computational-intermolecular-interactions-with-neuron-receptors
#5
Éverton José Ferreira de Araújo, Antônia Amanda Cardoso de Almeida, Oskar Almeida Silva, Iwyson Henrique Fernandes da Costa, Luis Mário Rezende Júnior, Francisco das Chagas Alves Lima, Luciano da Silva Lopes, Alberto José Cavalheiro, Paulo Michel Pinheiro Ferreira
ETHNOPHARMACOLOGICAL RELEVANCE: Casearia sylvestris is a medicinal plant traditionally used to treat snakebites, wounds, inflammation and gastric ulcers and scientific supports for have demonstrated its antitumor, antihyperlipidemic and antiparasitic properties. AIM OF THE STUDY: To assess the effects of a fraction with casearins (FC) on adult mice using classical experimental models of animal behavior and theoretical calculations to verify the interaction of Casearin X (Cas X) with neuron receptors...
January 7, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28077180/understanding-transmissibility-patterns-of-chagas-disease-through-complex-vector-host-networks
#6
Laura Rengifo-Correa, Christopher R Stephens, Juan J Morrone, Juan Luis Téllez-Rendón, Constantino González-Salazar
Chagas disease is one of the most important vector-borne zoonotic diseases in Latin America. Control strategies could be improved if transmissibility patterns of its aetiologic agent, Trypanosoma cruzi, were better understood. To understand transmissibility patterns of Chagas disease in Mexico, we inferred potential vectors and hosts of T. cruzi from geographic distributions of nine species of Triatominae and 396 wild mammal species, respectively. The most probable vectors and hosts of T. cruzi were represented in a Complex Inference Network, from which we formulated a predictive model and several associated hypotheses about the ecological epidemiology of Chagas disease...
January 12, 2017: Parasitology
https://www.readbyqxmd.com/read/28076955/post-translational-modifications-of-trypanosoma-cruzi-canonical-and-variant-histones
#7
Gisele F A Picchi, Vanessa Zulkievicz, Marco Aurelio Krieger, Nilson T Zanchin, Samuel Goldenberg, Lyris M F de Godoy
Chagas disease, caused by Trypanosoma cruzi, still affects millions of people around the world. No vaccines neither treatment for chronic Chagas disease are available, and chemotherapy for the acute phase is hindered by limited efficacy and severe side effects. The processes by which the parasite acquires infectivity and survives in different hosts involve tight regulation of gene expression, mainly post-transcriptionally. Nevertheless, chromatin structure/organization of trypanosomatids is similar to other eukaryotes, including histone variants and post-translational modifications...
January 11, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28076583/-social-factors-associated-with-use-of-prenatal-care-in-ecuador
#8
Amaya Sánchez-Gómez, William Cevallos, Mario J Grijalva, Luis C Silva-Ayçaguer, Susana Tamayo, Jerry O Jacobson, Jaime A Costales, Rodrigo Jiménez-Garcia, Valentín Hernández-Barrera, Suzanne Serruya, Celia Riera
Objectives: Prenatal care is a pillar of public health, enabling access to interventions including prevention of mother-to-child transmission of HIV and congenital syphilis. This paper describes social factors related to use of prenatal care in Ecuador. Methods: In 2011 and 2012, participant clinical history and interview information was analyzed from a national probability sample of 5 998 women presenting for delivery or miscarriage services in 15 healthcare facilities in Ecuador, to estimate prevalence of HIV, syphilis, and Chagas disease, and prenatal care coverage...
November 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28071587/new-imidazole-based-compounds-active-against-trypanosoma-cruzi
#9
Oluyomi Stephen Adeyemi, Maria Teresa Molina, Abiodun Omokehinde Eseola, Cristina Fonseca-Berzal, Alicia Gomez-Barrio
Current drugs available for the treatment of Chagas disease are fraught with several challenges including severe toxicity and limited efficacy. These factors coupled with the absence of effective drugs for treating the chronic stage of the disease have rendered the development of new drugs against Chagas disease a priority. This study screened several imidazole-based compounds for anti-Trypanosoma potential. Using in vitro experimental infection model, several imidazole-based compounds were screened for anti-proliferative effect on Trypanosoma cruzi epimastigotes...
January 10, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28066534/chagas-disease-research-and-development-is-there-light-at-the-end-of-the-tunnel
#10
REVIEW
Eric Chatelain
Chagas disease, or American trypanosomiasis, is the result of infection by the parasite Trypanosoma cruzi. It is endemic in Latin America, and spreading around the globe due to human migration. Although it was first identified more than a century ago, only two old drugs are available for treatment and a lot of questions related to the disease progression, its pathologies, and not to mention the assessment of treatment efficacy, are subject to debate and remain to be answered. Indeed, the current status of evidence and data available does not allow any absolute statement related to treatment needs and outcome for Chagas patients to be made...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/28062289/evaluation-of-p2x7-receptor-expression-in-peripheral-lymphocytes-and-immune-profile-from-patients-with-indeterminate-form-of-chagas-disease
#11
Viviane do Carmo Gonçalves Souza, Joabel Tonellotto Dos Santos, Fernanda Licker Cabral, Fernanda Barbisan, Maria Isabel Azevedo, Luiz Felipe Dias Carli, Sonia de Avila Botton, Jeandre Augusto Dos Santos Jaques, Daniela Bitencourt Rosa Leal
Chagas disease (CD) is caused by Trypanosoma cruzi, an intracellular protozoan which is a potent stimulator of cell-mediated immunity. In the indeterminate form of CD (IFCD) a modulation between pro- and anti-inflammatory responses establishes a host-parasite adaptation. It was previously demonstrated that purinergic ecto-enzymes regulates extracellular ATP and adenosine levels, influencing immune and inflammatory processes during IFCD. In inflammatory sites ATP, as well as its degradation product, adenosine, function as signaling molecules and immunoregulators through the activation of purinergic receptors...
January 3, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28059141/the-molecular-sensory-machinery-of-a-chagas-disease-vector-expression-changes-through-imaginal-moult-and-sexually-dimorphic-features
#12
Jose Manuel Latorre-Estivalis, Hugh M Robertson, Kimberly K O Walden, Jerônimo Ruiz, Leilane Oliveira Gonçalves, Alessandra A Guarneri, Marcelo Gustavo Lorenzo
The triatomine bug Rhodnius prolixus is a main vector of Chagas disease, which affects several million people, mostly in Latin-America. Host searching, pheromone communication, and microclimatic preferences are aspects of its behaviour that depend on multimodal sensory inputs. The molecular bases of these sensory processes are largely unknown. The expression levels of genes transcribed in antennae were compared between 5(th) instar larvae, and female and male adults by means of RNA-Seq. The antennae of R. prolixus showed increased expression of several chemosensory-related genes in imaginal bugs, while both sexes had similar expression patterns for most target genes...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28057975/chagas-disease-a-tropical-infection-of-interest-to-the-radiologist
#13
EDITORIAL
Edson Marchiori
No abstract text is available yet for this article.
November 2016: Radiologia Brasileira
https://www.readbyqxmd.com/read/28056025/development-of-diagnostics-for-chagas-disease-where-should-we-put-our-limited-resources
#14
Albert Picado, Andrea Angheben, Andrea Marchiol, Belkisyolé Alarcón de Noya, Laurence Flevaud, Maria Jesus Pinazo, Montserrat Gállego, Sheba Meymandi, Silvia Moriana
No abstract text is available yet for this article.
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28056014/prevalence-of-chagas-disease-in-a-u-s-population-of-latin-american-immigrants-with-conduction-abnormalities-on-electrocardiogram
#15
Mahmoud I Traina, Salvador Hernandez, Daniel R Sanchez, Jalal Dufani, Mohsin Salih, Adieb M Abuhamidah, Wilman Olmedo, Jason S Bradfield, Colin J Forsyth, Sheba K Meymandi
Chagas disease (CD) affects over six million people and is a leading cause of cardiomyopathy in Latin America. Given recent migration trends, there is a large population at risk in the United States (US). Early stage cardiac involvement from CD usually presents with conduction abnormalities on electrocardiogram (ECG) including right bundle branch block (RBBB), left anterior or posterior fascicular block (LAFB or LPFB, respectively), and rarely, left bundle branch block (LBBB). Identification of disease at this stage may lead to early treatment and potentially delay the progression to impaired systolic function...
January 5, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28054995/antiparasitic-activity-of-sulfur-and-fluorine-containing-bisphosphonates-against-trypanosomatids-and-apicomplexan-parasites
#16
Tamila Galaka, Mariana Ferrer Casal, Melissa Storey, Catherine Li, María N Chao, Sergio H Szajnman, Roberto Docampo, Silvia N J Moreno, Juan B Rodriguez
Based on crystallographic data of the complexes 2-alkyl(amino)ethyl-1,1-bisphosphonates-Trypanosoma cruzi farnesyl diphosphate synthase, some linear 1,1-bisphosphonic acids and other closely related derivatives were designed, synthesized and biologically evaluated against T. cruzi, the responsible agent of Chagas disease and against Toxoplasma gondii, the etiologic agent of toxoplasmosis and also towards the target enzymes farnesyl pyrophosphate synthase of T. cruzi (TcFPPS) and T gondii (TgFPPS), respectively...
January 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28054952/computer-aided-drug-design-using-sesquiterpene-lactones-as-sources-of-new-structures-with-potential-activity-against-infectious-neglected-diseases
#17
REVIEW
Chonny Herrera Acevedo, Luciana Scotti, Mateus Feitosa Alves, Margareth De Fátima Formiga Melo Diniz, Marcus Tullius Scotti
This review presents an survey to the biological importance of sesquiterpene lactones (SLs) in the fight against four infectious neglected tropical diseases (NTDs)-leishmaniasis, schistosomiasis, Chagas disease, and sleeping sickness-as alternatives to the current chemotherapies that display several problems such as low effectiveness, resistance, and high toxicity. Several studies have demonstrated the great potential of some SLs as therapeutic agents for these NTDs and the relationship between the protozoal activities with their chemical structure...
January 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28054225/spectrum-and-burden-of-neglected-tropical-diseases-observed-in-an-infectious-and-tropical-diseases-unit-in-florence-italy-2000-2015
#18
Lorenzo Zammarchi, Iacopo Vellere, Leonardo Stella, Filippo Bartalesi, Marianne Strohmeyer, Alessandro Bartoloni
Neglected tropical diseases (NTDs) are a diverse group of acute and chronic conditions with distinct characteristics that thrive mainly among the poorest populations, almost exclusively in tropical countries. To evaluate the relevance and impact of NTDs in a temperate area, the number and features of patients diagnosed with NTDs at the Infectious and Tropical Diseases Unit (ITDU), Azienda Ospedaliero-Universitaria Careggi, Florence, Italy between 2000 and 2015 were retrospectively reviewed. Overall 289 NTD cases were diagnosed in 283 subjects accounting for 2...
January 4, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28031550/bug-smash-bug-splash-a-case-report-of-an-unusual-transmission-of-american-trypanosomiasis-with-a-brief-review-of-the-literature
#19
Rafael Hernán Navarrete-Sandoval, Maximiliano Servín-Rojas
BACKGROUND Chagas disease is a chronic parasitosis transmitted by the inoculation of infected triatomine feces into wounds or conjunctival sac, transfusion, congenitally, organ transplantation, and ingestion of contaminated food. The disease is classified into an acute and chronic phase; the latter is a life-long infection that can be asymptomatic or progress to cardiac or digestive complications. CASE REPORT We report a case of acute-phase Chagas disease, transmitted by the splash of gut content from an infected triatomine into the conjunctival mucosa...
December 29, 2016: American Journal of Case Reports
https://www.readbyqxmd.com/read/28031230/rare-association-of-endomyocardial-fibrosis-and-chagas-heart-disease
#20
Viviane Tiemi Hotta, Bárbara Maria Ianni, Antonildes Nascimento Assunção, José Rodrigues Parga, Charles Mady
No abstract text is available yet for this article.
December 27, 2016: European Heart Journal Cardiovascular Imaging
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