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https://www.readbyqxmd.com/read/28982254/biotransformation-of-cubebin-by-aspergillus-spp-into-hinokinin-and-parabenzlactone-and-their-evaluation-against-oral-pathogenic-bacteria
#1
Caroline Arruda, Daniele de Souza Eugênio, Monique Rodrigues Moreira, Guilherme Venâncio Símaro, Jairo Kenupp Bastos, Carlos Henrique Gomes Martins, Márcio Luís Andrade Silva, Rodrigo Cássio Sola Veneziani, Paula Bruzadelle Vieira, Sérgio R Ambrósio
The biotransformation of the lignan (-)-cubebin by filamentous fungi Aspergillus terreus and Aspergillus niger is an efficient bioprocess for obtaining (-)-hinokinin and (-)-parabenzlactone. The relevance of getting (-)-hinokinin is due to its promising effect against oral pathogens, especially S. sanguinis (both MIC and MBC 12.5 μg/mL), and other previous reported effects against Chagas disease and as anti-inflammatory. The advantage of using fungal transformation is the use of non-toxic and/or non-pollutant reagents and/or solvents in comparison with semi-synthesis...
October 6, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28944986/development-and%C3%A2-in-vitro-in-vivo%C3%A2-evaluation-of-a-novel-benznidazole-liquid-dosage-form-using-a-quality-by-design-approach
#2
Higo Fernando Santos Souza, Daniel Real, Darío Leonardi, Sandra Carla Rocha, Victoria Alonso, Esteban Serra, Ariel Mariano Silber, Claudio Javier Salomon
OBJECTIVES: To develop an alcohol-free solution suitable for children of benznidazole, the drug of choice for treatment of Chagas disease. METHODS: In a quality-by-design approach, a systematic optimisation procedure was carried out to estimate the values of the factors leading to the maximum drug concentration. The formulations were analysed in terms of chemical and physical stability and drug content. The final preparation was subjected to an in vivo palatability assay...
September 25, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28941731/trypanosoma-cruzi-genetic-diversity-something-new-for-something-known-about-chagas-disease-manifestations-serodiagnosis-and-drug-sensitivity
#3
REVIEW
Bianca Zingales
The genetic diversity of Trypanosoma cruzi, the protozoan agent of Chagas disease, is widely recognized. At present, T. cruzi is partitioned into seven discrete typing units (DTUs), TcI-TcVI and Tcbat. This article reviews the present knowledge on the parasite population structure, the evolutionary relationships among DTUs and their distinct, but not exclusive ecological and epidemiological associations. Different models for the origin of hybrid DTUs are examined, which agree that genetic exchange among T. cruzi populations is frequent and has contributed to the present parasite population structure...
September 20, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28912906/constipation-is-related-to-small-bowel-disturbance-rather-than-colonic-enlargement-in-acquired-chagasic-megacolon
#4
Mauro Bafutto, Alejandro Ostermayer Luquetti, Salustiano Gabriel Neto, Felix Andre Sanches Penhavel, Enio Chaves Oliveira
BACKGROUND: Constipation is the main symptom of acquired chagasic megacolon. However, a number of patients with Chagas disease without colon involvement also have the same complain. This study evaluated the role of small bowel in constipated patients with Chagas disease with and without megacolon. METHODS: Orocecal transit time (OCTT) and oral glucose tolerance test (OGTT) in constipated non-chagasic and chagasic patients with and without megacolon were performed...
August 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/28864277/neolignans-from-leaves-of-nectandra-leucantha-lauraceae-display-in%C3%A2-vitro-antitrypanosomal-activity-via-plasma-membrane-and-mitochondrial-damages
#5
Simone S Grecco, Thais A Costa-Silva, Gerold Jerz, Fernanda S de Sousa, Vinicius S Londero, Mariana K Galuppo, Marta L Lima, Bruno J Neves, Carolina H Andrade, Andre G Tempone, João Henrique G Lago
Chagas disease is a neglected tropical disease, caused by the protozoan parasite Trypanosoma cruzi, which affects more than eight million people in Tropical and Subtropical countries especially in Latin America. Current treatment is limited to nifurtimox and benznidazole, both with reduced effectiveness and high toxicity. In this work, the n-hexane extract from leaves of Nectandra leucantha (Lauraceae) displayed in vitro antitrypanosomal activity against T. cruzi. Using several chromatographic steps, four related neolignans were isolated and chemically characterized as dehydrodieugenol B (1), 1-(8-propenyl)-3-[3'-methoxy-1'-(8-propenyl)-phenoxy]-4,5-dimethoxybenzene (2), 1-[(7S)-hydroxy-8-propenyl]-3-[3'-methoxy-1'-(8'-propenyl)-phenoxy]-4-hydroxy-5-methoxybenzene (3), and 1-[(7S)-hydroxy-8-propenyl]-3-[3'-methoxy-1'-(8'-propenyl)-phenoxy]-4,5-dimethoxybenzene (4)...
November 1, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28844141/discovery-and-optimization-of-5-amino-1-2-3-triazole-4-carboxamide-series-against-trypanosoma-cruzi
#6
Stephen Brand, Eun Jung Ko, Elisabet Viayna, Stephen Thompson, Daniel Spinks, Michael Thomas, Lars Sandberg, Amanda F Francisco, Shiromani Jayawardhana, Victoria C Smith, Chimed Jansen, Manu De Rycker, John Thomas, Lorna MacLean, Maria Osuna-Cabello, Jennifer Riley, Paul Scullion, Laste Stojanovski, Frederick R C Simeons, Ola Epemolu, Yoko Shishikura, Sabrinia D Crouch, Tania S Bakshi, Christopher J Nixon, Iain H Reid, Alan P Hill, Tim Z Underwood, Sean J Hindley, Sharon A Robinson, John M Kelly, Jose M Fiandor, Paul G Wyatt, Maria Marco, Timothy J Miles, Kevin D Read, Ian H Gilbert
Chagas' disease, caused by the protozoan parasite Trypanosoma cruzi, is the most common cause of cardiac-related deaths in endemic regions of Latin America. There is an urgent need for new safer treatments because current standard therapeutic options, benznidazole and nifurtimox, have significant side effects and are only effective in the acute phase of the infection with limited efficacy in the chronic phase. Phenotypic high content screening against the intracellular parasite in infected VERO cells was used to identify a novel hit series of 5-amino-1,2,3-triazole-4-carboxamides (ATC)...
September 14, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28835767/passiflora-cincinnata-extract-delays-the-development-of-motor-signs-and-prevents-dopaminergic-loss-in-a-mice-model-of-parkinson-s-disease
#7
Luiz Eduardo Mateus Brandão, Diana Aline Morais Ferreira Nôga, Aline Lima Dierschnabel, Clarissa Loureiro das Chagas Campêlo, Ywlliane da Silva Rodrigues Meurer, Ramón Hypolito Lima, Rovena Clara Galvão Januário Engelberth, Jeferson Souza Cavalcante, Clésio Andrade Lima, Murilo Marchioro, Charles Dos Santos Estevam, José Ronaldo Santos, Regina Helena Silva, Alessandra Mussi Ribeiro
Passiflora cincinnata Masters is a Brazilian native species of passionflower. This genus is known in the American continent folk medicine for its diuretic and analgesic properties. Nevertheless, few studies investigated possible biological effects of P. cincinnata extracts. Further, evidence of antioxidant actions encourages the investigation of possible neuroprotective effects in animal models of neurodegenerative diseases. This study investigates the effect of the P. cincinnata ethanolic extract (PAS) on mice submitted to a progressive model of Parkinson's disease (PD) induced by reserpine...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28829907/synergic-effect-of-oral-contraceptives-gstp1-polymorphisms-and-high-risk-hpv-infection-in-development-of-cervical-lesions
#8
B S Chagas, A P A D Gurgel, S S L Paiva Júnior, R C P Lima, M N Cordeiro, R R Moura, A V C Coelho, K C G Nascimento, J C Silva Neto, S Crovella, A C Freitas
Human papillomavirus (HPV) infection is considered a risk factor for cervical cancer. Even if the high-risk HPV (HR-HPV) infection is necessary, environmental co-factors and genetic susceptibility also play an important role in cervical cancer development. In this study, a possible association of rs1695 GSTP1 polymorphisms, HR-HPV infection, and oral contraceptive use with cancer lesion development in women was investigated. The study population comprised 441 Brazilian women from the Northeast region including 98 HPV-infected women with high-grade squamous intraepithelial lesions, 77 HPV-infected women with low-grade squamous intraepithelial lesions, and 266 HPV-negative women with no lesion, used as a control...
August 17, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28767982/description-of-an-oral-chagas-disease-outbreak-in-venezuela-including-a-vertically-transmitted-case
#9
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/28749767/case-report-successful-lung-transplantation-from-a-donor-seropositive-for-trypanosoma-cruzi-infection-chagas-disease-to-a-seronegative-recipient
#10
Fernando Salvador, Adrián Sánchez-Montalvá, Elena Sulleiro, Cristina Berastegui, Alberto Jauregui, Teresa Pont, Ibai Los-Arcos, Óscar Len, Joan Gavaldà, Israel Molina
The increasing shortage of organs for transplantation has prompted transplant programs to investigate the use of extended criteria donors, such as those with transmissible infectious diseases. Successful cases of organ transplantation (mostly kidney and liver) from Trypanosoma cruzi seropositive donors to seronegative recipients have been reported. We present a case of lung transplantation from a donor serologically positive for Chagas disease to a seronegative recipient, and provide a review of the literature...
October 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28741684/how-does-mandibular-bone-atrophy-influence-the-masticatory-function-ohrqol-and-satisfaction-in-overdenture-wearers-clinical-results-until-1-year-post-loading
#11
R M Marcello-Machado, F Faot, A J Schuster, A M Bielemann, O L Chagas Júnior, A A Del Bel Cury
This longitudinal clinical study investigated the differences in the masticatory function (MF), satisfaction and oral health-related quality of life (OHRQoL) between atrophic patients (AP) and non-atrophic patients (NAP) before and after rehabilitation with mandibular overdenture (MO). Twenty-six complete denture (CD) wearers were categorised into two groups, according to the mandibular bone atrophy (MBA) degree. MF was evaluated before and after 1, 3, 6 and 12 months of the MO loading via 2 standardised tests: (i) MP, masticatory performance (MP_X50, MPB, ME 5·6, ME 2·8) and (ii) ST, swallowing threshold (time, number of cycles, ST_X50, STB, ME 5·6, ME 2·8)...
November 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28735791/detection-of-incomplete-root-fractures-in-endodontically-treated-teeth-using-different-high-resolution-cone-beam-computed-tomographic-imaging-protocols
#12
Victor Aquino Wanderley, Frederico Sampaio Neves, Monikelly Carmo Chagas Nascimento, Gabriela Queiroz de Melo Monteiro, Natália Siqueira Lobo, Matheus Lima Oliveira, Joao Batista Sobrinho Nascimento Neto, Luciane Farias Araujo
INTRODUCTION: The purpose of this study was to compare different high-resolution cone-beam computed tomographic (CBCT) imaging protocols in the diagnosis of incomplete root fractures of endodontically treated teeth. METHODS: Twenty single-rooted human teeth were endodontically treated, and an incomplete root fracture was induced. The teeth were scanned with the CBCT unit PreXion 3D (Teracom, San Mateo, CA) operating at 2 different protocols: high resolution/standard (HI-STD) (19 seconds and 512 basis images) and high resolution/high density (HI-HI) (37 seconds and 1024 basis images)...
October 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28724448/systemic-insecticide-treatment-of-the-canine-reservoir-of-trypanosoma-cruzi-induces-high-levels-of-lethality-in-triatoma-infestans-a-principal-vector-of-chagas-disease
#13
Ariel Loza, Adrianna Talaga, Gladys Herbas, Ruben Jair Canaviri, Thalia Cahuasiri, Laura Luck, Alvaro Guibarra, Raquel Goncalves, Juan Antonio Pereira, Sonia A Gomez, Albert Picado, Louisa Alexandra Messenger, Caryn Bern, Orin Courtenay
BACKGROUND: Despite large-scale reductions in Chagas disease prevalence across Central and South America, Trypanosoma cruzi infection remains a considerable public health problem in the Gran Chaco region where vector-borne transmission persists. In these communities, peridomestic animals are major blood-meal sources for triatomines, and household presence of infected dogs increases T. cruzi transmission risk for humans. To address the pressing need for field-friendly, complementary methods to reduce triatomine infestation and interrupt T...
July 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28715142/cholinesterase-inhibition-reduces-arrhythmias-in-asymptomatic-chagas-disease
#14
Renata Rodrigues Teixeira de Castro, Graciema Porphirio, Sergio Salles Xavier, Ruy Silveira Moraes, Elton Luis Ferlin, Jorge Pinto Ribeiro, Antonio Claudio Lucas da Nóbrega
INTRODUCTION: Parasympathetic dysfunction may play a role in the genesis of arrhythmias in Chagas disease. AIM: This study evaluates the acute effects of pyridostigmine (PYR), a reversible cholinesterase inhibitor, on the occurrence of arrhythmias in patients with Chagas cardiac disease. METHOD: Following a double-blind, randomized, placebo-controlled, cross-over protocol, 17 patients (age 50±2 years) with Chagas cardiac disease type B underwent 24-hour Holter recordings after oral administration of either pyridostigmine bromide (45 mg, 3 times/day) or placebo (PLA)...
July 17, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28706938/inhibitors-of-glycosomal-protein-import-provide-new-leads-against-trypanosomiasis
#15
COMMENT
Vishal C Kalel, Leonidas Emmanouilidis, Maciej Dawidowski, Wolfgang Schliebs, Michael Sattler, Grzegorz M Popowicz, Ralf Erdmann
Vector-borne trypanosomatid parasite infections in tropical and sub-tropical countries constitute a major threat to humans and livestock. Trypanosoma brucei parasites are transmitted by tsetse fly and lead to African sleeping sickness in humans and Nagana in cattle. In Latin American countries, Trypanosoma cruzi infections spread by triatomine kissing bugs lead to Chagas disease. Various species of Leishmania transmitted to humans by phlebotomine sandflies manifest in a spectrum of diseases termed Leishmaniasis...
July 3, 2017: Microbial Cell
https://www.readbyqxmd.com/read/28607099/inhibition-of-host-cell-lysosome-spreading-by-trypanosoma-cruzi-metacyclic-stage-specific-surface-molecule-gp90-downregulates-parasite-invasion
#16
João Paulo Ferreira Rodrigues, Guilherme Hideki Takahashi Sant'ana, Maria Aparecida Juliano, Nobuko Yoshida
Successful infection by Trypanosoma cruzi, the agent of Chagas' disease, is critically dependent on host cell invasion by metacyclic trypomastigote (MT) forms. Two main metacyclic stage-specific surface molecules, gp82 and gp90, play determinant roles in target cell invasion in vitro and in oral T. cruzi infection in mice. The structure and properties of gp82, which is highly conserved among T. cruzi strains, are well known. Information on gp90 is still rather sparse. Here, we attempted to fill that gap. gp90, purified from poorly invasive G strain MT and expressing gp90 at high levels, inhibited HeLa cell lysosome spreading and the gp82-mediated internalization of a highly invasive CL strain MT expressing low levels of a diverse gp90 molecule...
September 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28536686/mandible-metastasis-of-small-cell-lung-cancer-mimicking-a-residual-cyst
#17
Renata Mendonça Moraes, Fabio Abreu Alves, Bruna Fernandes do Carmo Carvalho, Felipe D'Almeida Costa, Rodrigo Nascimento Lopes, Graziella Chagas Jaguar
Small cell lung carcinoma (SCLC) is an uncommon tumor characterized by an aggressive behavior with early metastasis, usually to the contralateral lung, liver, brain, and bones. There are only five cases of this particular tumor metastasizing to the oral cavity described in the English literature. We present the case of metastatic SCLC in the mandible with radiographic findings resembling a residual cyst. A 66-year-old man with previous diagnosis and treatment for a SCLC was referred to the Stomatology Department with a history of persistent pain in the mandible 1 year after the inferior right pre-molar tooth extraction...
January 2017: Autopsy & case reports
https://www.readbyqxmd.com/read/28527286/-possible-oral-transmission-of-chagas-disease-among-hydrocarbons-sector-workers-in-casanare-colombia-2014
#18
Liliana Patricia Zuleta-Dueñas, Ángela Johana López-Quiroga, Fernando Torres-Torres, Oneida Castañeda-Porras
INTRODUCTION: Trypanosoma cruzi, the etiological agent for Chagas disease, can be transmitted by oral intake of contaminated food or drinks. During epidemiological week 14 of 2014, two cases of acute Chagas disease were notified among hydrocarbons sector workers in Paz de Ariporo, Casanare. OBJECTIVE: To characterize the affected population, to establish control and prevention measures and to confirm the outbreak. MATERIALS AND METHODS: We conducted an outbreak investigation that included the following components: a) Search for symptomatic people compatible with Chagas disease according to the case definition for their referral to medical services; b) entomological survey (192/197 houses); c) sanitary inspection and microbiological analysis of food samples; and d) study of reservoirs...
June 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28512727/variability-of-high-dose-melphalan-exposure-on-oral-mucositis-in-patients-undergoing-prophylactic-low-level-laser-therapy
#19
Gustavo Henrique Rodrigues, Graziella Chagas Jaguar, Fabio Abreu Alves, Andre Guollo, Vanessa Oliveira Camandoni, Aline Santos Damascena, Vladmir Claudio Cordeiro Lima
The present study outlines the clinical impact and risk factors of oral mucositis in 79 patients with multiple myeloma following high-dose melphalan for autologous transplant. All patients underwent daily prophylactic low-level indium gallium aluminum phosphate diode laser therapy (660 nm, 15 mW, 3.75 J/cm(2), 10 s per point) from the beginning of the conditioning regimen up to day +2. Oral mucositis assessments were made daily until hospital discharge. For analysis, oral mucositis was divided into two groups according to severity: group 1, patients with oral mucositis grade <III (n = 71) and group 2, patients with oral mucositis grade ≥III (n = 8)...
July 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28506517/fish-oil-supplementation-benefits-the-murine-host-during-the-acute-phase-of-a-parasitic-infection-from-trypanosoma-cruzi
#20
Maria I Lovo-Martins, Aparecida D Malvezi, Rosiane V da Silva, Nágela G Zanluqui, Vera L H Tatakihara, Niels O S Câmara, Ana Paula L de Oliveira, Jean P S Peron, Marli C Martins-Pinge, Kevin L Fritsche, Phileno Pinge-Filho
Long-chain omega-3 polyunsaturated fatty acids (LC n-3 PUFA) are known to modulate a variety of immune cell functions. On occasion, this has led to diminished host resistance to certain viral and bacterial infections. Little is known about the impact of n-3 PUFA on host resistance to parasitic infection, however, based on results from a small study conducted more than two decades ago, we hypothesized that providing mice LC n-3 PUFA will diminish host resistance to Trypanosoma cruzi, the parasitic pathogen responsible for Chagas disease...
May 2017: Nutrition Research
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