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Chagas disease

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https://www.readbyqxmd.com/read/28814794/increased-body-exposure-to-new-anti-trypanosomal-through-nanoencapsulation
#1
Renata Tupinambá Branquinho, Gwenaelle Pound-Lana, Matheus Marques Milagre, Dênia Antunes Saúde-Guimarães, José Mário Carneiro Vilela, Margareth Spangler Andrade, Marta de Lana, Vanessa Carla Furtado Mosqueira
Lychnopholide, a lipophilic sesquiterpene lactone, is efficacious in mice at the acute and chronic phases of Chagas disease. Conventional poly-ε-caprolactone (PCL) and long-circulating poly(D,L-lactide)-block-polyethylene glycol (PLA-PEG) nanocapsules containing lychnopholide were developed and characterized. Lychnopholide presented high association efficiency (>90%) with the nanocapsules. A new, fast and simple HPLC-UV-based bioanalytical method was developed, validated in mouse plasma and applied to lychnopholide quantification in in vitro release kinetics and pharmacokinetics...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807005/first-records-of-triatoma-rubrofasciata-de-geer-1773-hemiptera-reduviidae-in-foshan-guangdong-province-southern-china
#2
Qin Liu, Yun-Hai Guo, Yi Zhang, Zheng-Bin Zhou, Liang-Liang Zhang, Dan Zhu, Xiao-Nong Zhou
BACKGROUND: Triatomines, also known as kissing bugs, which are found throughout the world and especially in Latin America, are well known natural vectors that transmit American trypanosomiasis, also called Chagas disease. In China, the presence of two species of Triatoma (Triatoma rubrofasciata and T. sinica) was recorded in the past. Due to the growing population and the increasing risk of the global spread of Chagas disease, triatomines became a potential public health nuisance, and in 2016, we started monitoring triatomine activities in southern China...
August 15, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28805026/correlation-of-6-minute-walk-test-with-left-ventricular-function-and-quality-of-life-in-heart-failure-due-to-chagas-disease
#3
Mayara da Costa Chambela, Mauro Felippe Felix Mediano, Roberto Rodrigues Ferreira, André Miguel Japiassú, Mariana Caldas Waghabi, Gilberto Marcelo Sperandio da Silva, Roberto Magalhães Saraiva
OBJECTIVES: To evaluate the correlation of the total distance walked during the six-minute walk test (6-MWT) with left ventricular function and quality of life in patients with Chagas Disease (ChD) complicated by heart failure. METHODS: This cross-sectional study of adult patients with ChD and heart failure diagnosed based on Framingham criteria. 6MWT was performed following international guidelines. New York Heart Association functional class, brain natriuretic peptide (BNP) serum levels, echocardiographic parameters, and quality of life (SF-36 and MLHFQ questionnaires) were determined and their correlation with the distance covered at the 6MWT was tested...
August 14, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28799498/structure-based-approaches-targeting-parasite-cysteine-proteases
#4
Rafael Pinto Vieira, Viviane Corrêa Santos, Rafaela Salgado Ferreira
Cysteine proteases are essential hydrolytic enzymes present in the majority of organisms, including viruses and unicellular parasites. Despite the high sequence identity displayed among these proteins, specific structural features across different species grant distinct functions to these biomolecules, frequently related to pathological conditions. Consequently, their relevance as promising targets for potential specific inhibitors has been highlighted and occasionally validated in recent decades. In this review, we discuss the recent outcomes on structure-based campaigns aiming the discovery of new inhibitor prototypes against cruzain and falcipain, as alternative therapeutic tools for Chagas disease and malaria treatments, respectively...
August 10, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28795372/development-of-a-pharmacophore-for-cruzain-using-oxadiazoles-as-virtual-molecular-probes-quantitative-structure-activity-relationship-studies
#5
Anacleto S de Souza, Marcelo T de Oliveira, Adriano D Andricopulo
Chagas's is a neglected tropical disease caused by the protozoan parasite Trypanosoma cruzi. According to the World Health Organization, 7 million people are infected worldwide leading to 7000 deaths per year. Drugs available, nifurtimox and benzimidazole, are limited due to low efficacy and high toxicity. As a validated target, cruzain represents a major front in drug discovery attempts for Chagas disease. Herein, we describe the development of 2D QSAR ([Formula: see text] = 0.81) and a 3D-QSAR-based pharmacophore ([Formula: see text] = 0...
August 9, 2017: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/28793113/effects-of-a-health-education-program-on-cognition-mood-and-functional-capacity
#6
Juliane Cristine Dias, Isabela Azevedo Rodrigues, Francine Golghetto Casemiro, Diana Quirino Monteiro, Bruna Moretti Luchesi, Marcos Hortes Nisihara Chagas, Paula Costa Castro, Sofia Cristina Iost Pavarini, Aline Cristina Martins Gratão
Objective: Assess the effect of a Health Education (HE) program on cognition, mood and functional capacity of participants in a University of The Third Age (U3A). Method: Controlled clinical trial. The HE Program consisted of 10 sessions with group dynamics, including orientations on disease prevention and cognitive stimulation exercises, lasting four months. Intervention Group (IG) n=13; and Control Group (CG) n=15. All were assessed at the start and end of the study, using Addenbrook´s Cognitive Examination-Revised (ACE-R), Beck Depression and Anxiety Inventory (BDI/BAI) and Functional Independence Measure (FIM)...
July 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28793024/socioenvironmental-conditions-and-intestinal-parasitic-infections-in-brazilian-urban-slums-a-cross-sectional-study
#7
Caroline Ferraz Ignacio, Milena Enderson Chagas da Silva, Natasha Berendonk Handam, Maria de Fatima Leal Alencar, Adriana Sotero-Martins, Martha Macedo de Lima Barata, Antonio Henrique Almeida de Moraes
Methods: A cross-sectional study covering an agglomeration of urban slums was conducted between 2015 and 2016 using participants observation, a socioeconomic survey, and the spontaneous sedimentation method with three slides per sample to analyze fresh stool specimens ( n =595) searching for intestinal parasites. Results: Endolimax nana ( n =95, 16.0%) and Entamoeba coli ( n =65, 10.9%) were the most frequently identified agents, followed by Giardia intestinalis ( n =24, 4...
August 7, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28790836/evaluation-of-coronary-calcium-score-in-patients-with-normocalcemic-primary-hyperparathyroidism
#8
Patrícia Nunes Mesquita, Ana Paula Dornelas Leão Leite, Stella das Chagas Crisóstomo, Enio Veras Filho, Lucas da Cunha Xavier, Francisco Bandeira
RATIONALE: Given that the diagnosis of primary hyperparathyroidism (PHPT) is given at an increasingly less-symptomatic phase, and the literature data on the cardiovascular risk of patients with normocalcemic primary hyperparathyroidism (NPHPT) are controversial, the coronary calcium score (CCS), which is correlated with coronary artery disease, may be useful for clarifying the association between cardiovascular risk and NPHPT. OBJECTIVE: This research aims to describe the CCS and the clinical and laboratory variables of patients with NPHPT compared with a control group and to verify the presence of an association between NPHPT and CCS...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28781905/genetic-variants-in-snca-and-the-risk-of-sporadic-parkinson-s-disease-and-clinical-outcomes-a-review
#9
REVIEW
Clarissa Loureiro das Chagas Campêlo, Regina Helena Silva
There is increasing evidence of the contribution of genetic susceptibility to the etiology of Parkinson's disease (PD). Genetic variations in the SNCA gene are well established by linkage and genome-wide association studies. Positive associations of single nucleotide polymorphisms (SNPs) in SNCA and increased risk for PD were found. However, the role of SNCA variants in individual traits or phenotypes of PD is unknown. Here, we reviewed the current literature and identified 57 studies, performed in fourteen different countries, that investigated SNCA variants and susceptibility to PD...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28777208/survey-of-pediatric-infectious-diseases-society-members-about-congenital-chagas-disease
#10
Morven S Edwards, Francisca A Abanyie, Susan P Montgomery
Participants in a survey about congenital Chagas disease, distributed electronically to Pediatric Infectious Diseases Society members, perceived having limited knowledge about congenital Trypanosoma cruzi infection. Most rarely or never consider the diagnosis in infants born to parents from Latin America. Improved awareness of congenital Chagas disease and assessment of at-risk infants is needed.
August 1, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28774654/chagas-disease-importance-of-rats-as-reservoir-hosts-of-trypanosoma-cruzi-chagas-1909-in-western-mexico
#11
Gumercindo Goicochea-Del Rosal, Benjamín Nogueda-Torres, María Elena Villagrán, José Antonio de Diego-Cabrera, Oziel Dante Montañez-Valdez, José Alejandro Martínez-Ibarra
In Mexico, the role of most species of mammals involved in the transmission cycle of Trypanosoma cruzi Chagas, 1909 is poorly known. It was carried out a study to investigate the importance of rats as reservoir of T. cruzi in western Mexico, an area with important risk of transmission of T. cruzi to human. Thirty-eight human dwellings were searched on two representative towns of western Mexico along twelve months for collection of rats and triatomines. Study rats (Rattus norvegicus) Berkenhout, 1769 and triatomines (Meccus phyllosomus longipennis) (Usinger, 1939) were collected inside and outside human dwellings...
July 31, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28769980/galectin-3-knockdown-impairs-survival-migration-and-immunomodulatory-actions-of-mesenchymal-stromal-cells-in-a-mouse-model-of-chagas-disease-cardiomyopathy
#12
Bruno Solano de Freitas Souza, Kátia Nunes da Silva, Daniela Nascimento Silva, Vinícius Pinto Costa Rocha, Bruno Diaz Paredes, Carine Machado Azevedo, Carolina Kymie Nonaka, Gisele Batista Carvalho, Juliana Fraga Vasconcelos, Ricardo Ribeiro Dos Santos, Milena Botelho Pereira Soares
Therapies based on transplantation of mesenchymal stromal cells (MSC) hold promise for the management of inflammatory disorders. In chronic Chagas disease cardiomyopathy (CCC), caused by chronic infection with Trypanosoma cruzi, the exacerbated immune response plays a critical pathophysiological role and can be modulated by MSC. Here, we investigated the role of galectin-3 (Gal-3), a beta-galactoside-binding lectin with several actions on immune responses and repair process, on the immunomodulatory potential of MSC...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28768559/maldi-tof-ms-protein-profiling-for-the-rapid-identification-of-chagas-disease-triatomine-vectors-and-application-to-the-triatomine-fauna-of-french-guiana
#13
Maureen Laroche, Jean-Michel Bérenger, Gladys Gazelle, Denis Blanchet, Didier Raoult, Philippe Parola
Triatomines are haematophagous insects involved in the transmission of Trypanosoma cruzi, the aetiological agent of Chagas disease. The vector competence of these arthropods can be highly variable, depending on the species. A precise identification is therefore crucial for the epidemiological surveillance of T. cruzi and the determination of at-risk human populations. To circumvent the difficulties of morphological identification and the lack of comprehensiveness of the GenBank database, we hereby propose an alternative method for triatomine identification...
August 3, 2017: Parasitology
https://www.readbyqxmd.com/read/28767982/description-of-an-oral-chagas-disease-outbreak-in-venezuela-including-a-vertically-transmitted-case
#14
Belkisyolé Alarcón de Noya, Gladymar Pérez-Chacón, Zoraida Díaz-Bello, Sonia Dickson, Arturo Muñoz-Calderón, Carlos Hernández, Yadira Pérez, Luciano Mauriello, Eyleen Moronta
We describe the eleventh major outbreak of foodborne Trypanosoma cruzi transmission in urban Venezuela, including evidence for vertical transmission from the index case to her fetus. After confirming fetal death at 24 weeks of gestation, pregnancy interruption was performed. On direct examination of the amniotic fluid, trypomastigotes were detected. T. cruzi specific-polymerase chain reaction (PCR) also proved positive when examining autopsied fetal organs. Finally, microscopic fetal heart examination revealed amastigote nests...
August 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28767980/bone-marrow-cell-migration-to-the-heart-in-a-chimeric-mouse-model-of-acute-chagasic-disease
#15
Camila Iansen Irion, Bruno Diaz Paredes, Guilherme Visconde Brasil, Sandro Torrentes da Cunha, Luis Felipe Paula, Alysson Roncally Carvalho, Antonio Carlos Campos de Carvalho, Adriana Bastos Carvalho, Regina Coeli Dos Santos Goldenberg
BACKGROUND: Chagas disease is a public health problem caused by infection with the protozoan Trypanosoma cruzi. There is currently no effective therapy for Chagas disease. Although there is some evidence for the beneficial effect of bone marrow-derived cells in chagasic disease, the mechanisms underlying their effects in the heart are unknown. Reports have suggested that bone marrow cells are recruited to the chagasic heart; however, studies using chimeric mouse models of chagasic cardiomyopathy are rare...
August 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28766862/inhibition-of-protein-protein-interactions-new-options-for-developing-drugs-against-neglected-tropical-diseases
#16
Thorsten Berg
Wake up! Sleeping sickness and Chagas disease are neglected tropical diseases caused by trypanosome infections. Small molecules that disrupt a crucial protein-protein interaction in the parasites offer a new approach to drug development for these diseases.
August 2, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28766165/chagas-disease-modulation-of-the-inflammatory-response-by-acetylcholinesterase-in-hematological-cells-and-brain-tissue
#17
Aniélen D Silva, Nathieli B Bottari, Guilherme M do Carmo, Matheus D Baldissera, Carine F Souza, Vanessa S Machado, Vera M Morsch, Maria Rosa C Schetinger, Ricardo E Mendes, Silvia G Monteiro, Aleksandro S Da Silva
Chagas disease is an acute or chronic illness that causes severe inflammatory response, and consequently, it may activate the inflammatory cholinergic pathway, which is regulated by cholinesterases, including the acetylcholinesterase. This enzyme is responsible for the regulation of acetylcholine levels, an anti-inflammatory molecule linked to the inflammatory response during parasitic diseases. Thus, the aim of this study was to investigate whether Trypanosoma cruzi infection can alter the activity of acetylcholinesterase and acetylcholine levels in mice, and whether these alterations are linked to the inflammatory cholinergic signaling pathway...
August 1, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28763070/-knowledge-of-vector-borne-diseases-dengue-rickettsiosis-and-chagas-disease-in-physicians
#18
César I Lugo-Caballero, Karla Dzul-Rosado, Irving Dzul-Tut, Ángel Balam-May, Jorge Zavala-Castro
BACKGROUND: The ecological conditions of Yucatan made it a suitable region for the acquisition of vector-borne diseases such as dengue, rickettsiosis, and Chagas disease. As the epidemiological burden of these diseases shows an alarming increase of severe cases, the early establishment of diagnosis and therapeutics by first-contact physicians is a critical step that is not being fulfilled due to several reasons, including poor knowledge. OBJECTIVE: To determine the level of knowledge related to dengue, Chagas disease, and rickettsiosis among rural first-contact physicians of Yucatan...
May 2017: Gaceta Médica de México
https://www.readbyqxmd.com/read/28759609/knockout-of-the-gamma-subunit-of-the-ap-1-adaptor-complex-in-the-human-parasite-trypanosoma-cruzi-impairs-infectivity-and-differentiation-and-prevents-the-maturation-and-targeting-of-the-major-protease-cruzipain
#19
Claudia Maria do Nascimento Moreira, Cassiano Martin Batista, Jessica Chimenes Fernandes, Rafael Luis Kessler, Maurilio José Soares, Stenio Perdigão Fragoso
The AP-1 Adaptor Complex assists clathrin-coated vesicle assembly in the trans-Golgi network (TGN) of eukaryotic cells. However, the role of AP-1 in the protozoan Trypanosoma cruzi-the Chagas disease parasite-has not been addressed. Here, we studied the function and localization of AP-1 in different T. cruzi life cycle forms, by generating a gene knockout of the large AP-1 subunit gamma adaptin (TcAP1-γ), and raising a monoclonal antibody against TcAP1-γ. Co-localization with a Golgi marker and with the clathrin light chain showed that TcAP1-γ is located in the Golgi, and it may interact with clathrin in vivo, at the TGN...
2017: PloS One
https://www.readbyqxmd.com/read/28759265/from-lemongrass-to-ivermectin-ethnomedical-management-of-chagas-disease-in-tropical-bolivia
#20
Colin Forsyth
Chagas disease is a neglected tropical disease; the only viable drugs are outdated and produce frequent side effects, and the overwhelming majority of cases are undiagnosed and untreated. Globally, people encounter numerous impediments to accessing biomedical treatment for Chagas disease. However, little is known about how people with Chagas disease manage their health outside the biomedical system. In this article, I discuss knowledge of ethnomedical treatments among marginalized patients in an endemic area of Bolivia...
July 31, 2017: Medical Anthropology
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