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Geraseev LC, Santos SS, Chaves AS, de Carvalho PPX, da Motta SAB, Machado FS, Duarte ER, Passetti RAC. Energy metabolism and respirometry of lambs fed sun or shade dried hays of banana crop residues. Trop Anim Health Prod 2024; 56:139. [PMID: 38656618 DOI: 10.1007/s11250-024-03984-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 04/15/2024] [Indexed: 04/26/2024]
Abstract
We aimed to evaluate the effects of different drying methods for banana residues on the energy metabolism and respirometry of growing lambs. Twenty Santa Inês x Dorper lambs were fed five experimental diets: Tifton 85 grass hay (Control), shade-dried banana leaf hay (LH Shade), shade-dried pseudostem banana hay (PH Shade), sun-dried banana leaf hay (LH Sun), and sun-dried banana pseudostem hay (PH Sun). Nutrient intake and digestibility were assessed in metabolic cages, whereas O2 consumption and CO2, methane, and heat production were measured in a respirometry chamber with animals fed at maintenance and ad libitum levels. Nutrient and energy intake was not influenced by diet. Pseudostem hay had higher apparent digestibility of dry matter (71.5%), organic matter (72.4%), and neutral detergent fiber (58.0%). However, this led to greater energy loss in the form of methane (12.1%). The banana residue hays and drying methods did not alter oxygen consumption, CO2 production, or heat production of animals fed ad libitum or during maintenance. On the other hand, the use of leaf hay resulted in a reduction of 24.7% in enteric methane production of animals fed ad libitum. The inclusion of pseudostem hay is recommended in sheep feedlot diet. This residue provided greater use of DM, however promoted a greater loss of energy in the form of methane, resulting in similar energy consumption. The drying methods did not reduce the availability of nutrients and the sun drying method is recommended, since it is a faster drying method.
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Affiliation(s)
- Luciana Castro Geraseev
- Institute of Agricultural Sciences, Federal University of Minas Gerais, Av. Universitária, 1000 - Universitário, Montes Claros, Minas Gerais, 39404-547, Brazil.
| | - Sarah Silva Santos
- Institute of Agricultural Sciences, Federal University of Minas Gerais, Av. Universitária, 1000 - Universitário, Montes Claros, Minas Gerais, 39404-547, Brazil
| | - Amália Saturnino Chaves
- Veterinary Department, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | - Pedro Paulo Xavier de Carvalho
- Institute of Agricultural Sciences, Federal University of Minas Gerais, Av. Universitária, 1000 - Universitário, Montes Claros, Minas Gerais, 39404-547, Brazil
| | - Sthephane Alverina Briguente da Motta
- Institute of Agricultural Sciences, Federal University of Minas Gerais, Av. Universitária, 1000 - Universitário, Montes Claros, Minas Gerais, 39404-547, Brazil
| | | | - Eduardo Robson Duarte
- Institute of Agricultural Sciences, Federal University of Minas Gerais, Av. Universitária, 1000 - Universitário, Montes Claros, Minas Gerais, 39404-547, Brazil
| | - Rodrigo Augusto Cortêz Passetti
- Institute of Agricultural Sciences, Federal University of Minas Gerais, Av. Universitária, 1000 - Universitário, Montes Claros, Minas Gerais, 39404-547, Brazil
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Terra DADA, de Oliveira Carvalho RD, da Silva TF, Dos Santos Freitas A, Góes-Neto A, Amarante VS, Azevedo V, Vilela EG, Coelho LGV, Silva ROS. Bacterial microbiome changes after fecal transplantation for recurrent Clostridioides difficile infection in the Brazilian center. Braz J Microbiol 2024; 55:719-725. [PMID: 38158466 PMCID: PMC10920509 DOI: 10.1007/s42770-023-01227-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024] Open
Abstract
Clostridioides difficile infection (CDI) poses a significant global health threat owing to its substantial morbidity and associated healthcare costs. A key challenge in controlling CDI is the risk of multiple recurrences, which can affect up to 30% of patients. In such instances, fecal microbiota transplantation (FMT) is increasingly recognized as the optimal treatment. However, few related studies have been conducted in developing countries, and the microbiota composition of Brazilian patients and its dynamic modification post-FMT remain largely unexplored. This study aimed to evaluate the changes in the bacterial gut microbiome in Brazilian patients with recurrent CDI post-FMT. Ten patients underwent FMT, and the primary and overall CDI resolution rates were 80% and 90% after the first and second FMT, respectively. FMT was associated with an early increase in Shannon's diversity, evident as soon as 1 week post-FMT and persisting for at least 25 days post-treatment. Post-treatment, the abundance of Firmicutes increased and that of Proteobacteria decreased. Specifically, the abundance of the genera Ruminococcus, Faecalibacterium, Lachnospira, and Roseburia of the Firmicutes phylum was significantly higher 1 week post-transplantation, with Ruminococcus and Faecalibacterium remaining enriched 25 days post-transplantation. This study is the first of its kind in Brazil to evaluate the microbiota of a donor and patients undergoing FMT. Our findings suggest that FMT can induce remarkable changes in the gut microbiota, characterized by an early and sustained increase in diversity lasting at least 25 days. FMT also promotes enrichment of genera such as Ruminococcus spp., Faecalibacterium spp., and Roseburia spp., essential for therapeutic success.
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Affiliation(s)
| | - Rodrigo Dias de Oliveira Carvalho
- Laboratory of Cellular and Molecular Genetics, Department of Genetics, Ecology and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
- Department of Biochemistry and Biophysics, Institute of Health Sciences, Federal University of Bahia, Salvador Belo Horizonte, Brazil
| | - Tales Fernando da Silva
- Department of Biochemistry and Biophysics, Institute of Health Sciences, Federal University of Bahia, Salvador Belo Horizonte, Brazil
| | - Andria Dos Santos Freitas
- Laboratory of Cellular and Molecular Genetics, Department of Genetics, Ecology and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Aristóteles Góes-Neto
- Laboratory of Molecular and Computational Biology of Fungi, Department of Microbiology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Victor Santos Amarante
- Anaerobic Laboratory, Veterinary Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vasco Azevedo
- Laboratory of Cellular and Molecular Genetics, Department of Genetics, Ecology and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Eduardo Garcia Vilela
- Alfa Institute of Gastroenterology of Clinic Hospital of Federal University of Minas Gerais, Minas Gerais, Belo Horizonte, Brazil
| | - Luiz Gonzaga Vaz Coelho
- Alfa Institute of Gastroenterology of Clinic Hospital of Federal University of Minas Gerais, Minas Gerais, Belo Horizonte, Brazil
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da Rocha HA, Reis IA, Cherchiglia ML. Early and Frequent Psychiatric Readmissions in a Brazilian Cohort of Hospitalized Patients Between 2001 and 2013. Adm Policy Ment Health 2024; 51:147-161. [PMID: 37971543 DOI: 10.1007/s10488-023-01322-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVE To characterize the profile of patients who were readmitted for mental and behavioral disorders, in the Brazilian Unified Health System, from 2001 to 2014, and the factors associated with early and frequent readmission. METHOD A retrospective, non-concurrent cohort study of patients admitted with a primary diagnosis of mental or behavioral disorders, from 2001 to 2014. This study selected demographic variables and clinical variables, as well as variables related to the characteristics of the hospitals. Poisson Regression methods with a robust variance estimator were used to estimate the incidence rate ratio (IRR) for each of the outcomes. RESULTS Early readmission occurred for 6.8% of the patients and frequent readmission for 8.3%. Characteristics such as being male, younger, with a diagnosis of a bipolar disorder, and admitted to a specialized hospital show a higher IRR for early readmission. The occurrence of early readmission was the most heavily associated characteristic with an increased rate of early readmission, and the magnitude of this increase depends on the patient's age. CONCLUSION Early and frequent readmissions are linked to patients' demographics, clinical information and health system's organization. Early readmission should be a priority in treatment planning to prevent frequent readmissions due to its strong association.
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Affiliation(s)
- Hugo André da Rocha
- Faculdade de Medicina. Programa de Pós- Graduação em Saúde Pública. Belo Horizonte, Universidade Federal de Minas Gerais, Minas Gerais, Brasil.
| | - Ilka Afonso Reis
- Instituto de Ciências Exatas. Departamento de Estatística. Belo Horizonte, Universidade Federal de Minas Gerais, Minas Gerais, Brasil
| | - Mariangela Leal Cherchiglia
- Faculdade de Medicina. Departamento de Medicina Preventiva e Social, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Mansur AAP, Carvalho SC, Dorneles EMS, Lage AP, Lobato ZIP, Mansur HS. Bio-functionalized nanocolloids of ZnS quantum dot/amine-rich polypeptides for bioimaging cancer cells with antibacterial activity: " seeing is believing". RSC Adv 2023; 13:34378-34390. [PMID: 38024978 PMCID: PMC10665648 DOI: 10.1039/d3ra06711d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/19/2023] [Indexed: 12/01/2023] Open
Abstract
Among almost 200 types of cancers, glioma is considered one of the most common forms of malignant tumors located in the central nervous system (CNS). Glioblastoma (GBM), one of the deadliest types of brain cancer, remains one of the challenges faced by oncologists. Thus, smartly designed nanomaterials biofunctionalized with polypeptides can offer disruptive strategies relying on the earliest possible diagnosis ("seeing is believing") combined with more efficient therapies for fighting cancer cells. To worsen this scenario, bacteria infections very often pose a serious challenge to cancer-immunodeficient patients under chemotherapy. Thus, in this research, we report for the first time the design and synthesis of novel nanoconjugates composed of photoluminescent ZnS quantum dots (ZnS QDs), which were directly surface biofunctionalized with epsilon-poly-l-lysine (εPL), acting as an amine-rich cell-penetrating peptide (CPP) and antimicrobial peptide agent (AMP). These nanoconjugates (named ZnS@CPP-AMP) were produced through a one-step facile, eco-friendly, and biocompatible colloidal aqueous process to be applied as a proof of concept as nanoprobes for bioimaging GBM cancer cells (U87-MG) associated with synergic antibacterial activity. They were characterized regarding their physicochemical and optical properties associated with the biological activity. The results demonstrated that chemically stable aqueous colloidal nanoconjugates were effectively formed, resembling core-shell (inorganic, ZnS, organic, εPL) nanostructures with positively surface-charged features due to the cationic nature of the amine-rich polypeptide. More importantly, they demonstrated photoluminescent activity, cytocompatibility in vitro, and no significant intracellular reactive oxygen species (ROS) generation. These ZnS@CPP-AMP nanocolloids behaved as fluorescent nanoprobes for bioimaging GBM cancer cells, where the polycationic nature of the εPL biomolecule may have enhanced the cellular uptake. Additionally, they displayed mild antibacterial growth inhibition due to electrostatic interactions with bacterial membranes. Thus, it can be envisioned that these novel photoluminescent colloidal nanoconjugates offer novel nanoplatforms that can be specifically targeted with biomolecules for bioimaging to diagnose highly lethal cancers, such as GBM, and as an adjuvant in antibacterial therapy.
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Affiliation(s)
- Alexandra A P Mansur
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology, and Innovation-CeNano2I, Federal University of Minas Gerais, UFMG Av. Antônio Carlos, 6627 - Escola de Engenharia, Bloco 2 - Sala 2233 31.270-901 Belo Horizonte MG Brazil +55-31-34091843 +55-31-34091843
| | - Sandhra C Carvalho
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology, and Innovation-CeNano2I, Federal University of Minas Gerais, UFMG Av. Antônio Carlos, 6627 - Escola de Engenharia, Bloco 2 - Sala 2233 31.270-901 Belo Horizonte MG Brazil +55-31-34091843 +55-31-34091843
| | - Elaine M S Dorneles
- Departamento de Medicina Veterinária, Universidade Federal de Lavras, UFLA Brazil
| | - Andrey P Lage
- Departamento de Medicina Veterinária Preventiva, Federal University of Minas Gerais, UFMG Brazil
| | - Zelia I P Lobato
- Departamento de Medicina Veterinária Preventiva, Federal University of Minas Gerais, UFMG Brazil
| | - Herman S Mansur
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology, and Innovation-CeNano2I, Federal University of Minas Gerais, UFMG Av. Antônio Carlos, 6627 - Escola de Engenharia, Bloco 2 - Sala 2233 31.270-901 Belo Horizonte MG Brazil +55-31-34091843 +55-31-34091843
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Fernandes HB, de Oliveira IM, Postler TS, Lima SQ, Santos CAC, Oliveira MS, Leão FB, Ghosh S, Souza MC, Andrade W, Silva AM. Transcriptomic analysis reveals that RasGEF1b deletion alters basal and LPS-induced expression of genes involved in chemotaxis and cytokine responses in macrophages. Sci Rep 2023; 13:19614. [PMID: 37950057 PMCID: PMC10638313 DOI: 10.1038/s41598-023-47040-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 11/08/2023] [Indexed: 11/12/2023] Open
Abstract
Ras guanine nucleotide exchange factor member 1b (RasGEF1b) of the RasGEF/CDC25 domain-containing family is preferentially expressed by macrophages. However, information is lacking about its role in macrophage function. In this study, we generated mice with ubiquitous deletion of Rasgef1b and used RNA-seq-based transcriptomics to compare the global gene expression in wild-type and knock-out primary bone-marrow-derived macrophages under basal conditions and after lipopolysaccharide (LPS) treatment. Transcriptional filtering identified several genes with significantly different transcript levels between wild-type and knock-out macrophages. In total, 49 and 37 differentially expressed genes were identified at baseline and in LPS-activated macrophages, respectively. Distinct biological processes were significantly linked to down-regulated genes at the basal condition only, and largely included chemotaxis, response to cytokines, and positive regulation of GTPase activity. Importantly, validation by RT-qPCR revealed that the expression of genes identified as down-regulated after LPS stimulation was also decreased in the knock-out cells under basal conditions. We used a luciferase-based reporter assay to showcase the capability of RasGEF1b in activating the Serpinb2 promoter. Notably, knockdown of RasGEF1b in RAW264.7 macrophages resulted in impaired transcriptional activation of the Serpinb2 promoter, both in constitutive and LPS-stimulated conditions. This study provides a small collection of genes that shows relative expression changes effected by the absence of RasGEF1b in macrophages. Thus, we present the first evidence that RasGEF1b mediates the regulation of both steady-state and signal-dependent expression of genes and propose that this GEF plays a role in the maintenance of the basal transcriptional level in macrophages.
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Affiliation(s)
- Heliana B Fernandes
- Laboratory of Inflammatory Genes, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil
| | - Isadora Mafra de Oliveira
- Laboratory of Inflammatory Genes, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil
- Faculdade de Medicina de Ribeirão Preto, Av. Bandeirantes, 3900 - Campus da USP, Ribeirão Preto, SP, 14049-900, Brazil
| | - Thomas S Postler
- Department of Microbiology & Immunology, Vagelos College of Physicians & Surgeons, Columbia University Irving Medical Center, New York, NY, USA
- Design and Development Laboratory, International AIDS Vaccine Initiative, Brooklyn, NY, USA
| | - Sérgio Q Lima
- Laboratory of Inflammatory Genes, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil
| | - Cícera A C Santos
- Laboratory of Inflammatory Genes, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil
- Instituto Federal de Educação, Ciência e Tecnologia de Rondônia (IFRO), Guajará-Mirim, RO, Brazil
| | - Michaelle S Oliveira
- Laboratory of Inflammatory Genes, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil
| | - Felipe B Leão
- Department of Microbiology & Immunology, Vagelos College of Physicians & Surgeons, Columbia University Irving Medical Center, New York, NY, USA
| | - Sankar Ghosh
- Department of Microbiology & Immunology, Vagelos College of Physicians & Surgeons, Columbia University Irving Medical Center, New York, NY, USA
| | - Maria C Souza
- Faculdade de Medicina de Ribeirão Preto, Av. Bandeirantes, 3900 - Campus da USP, Ribeirão Preto, SP, 14049-900, Brazil
| | - Warrison Andrade
- Faculdade de Medicina de Ribeirão Preto, Av. Bandeirantes, 3900 - Campus da USP, Ribeirão Preto, SP, 14049-900, Brazil
| | - Aristóbolo M Silva
- Laboratory of Inflammatory Genes, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil.
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Ribeiro R, Silva EG, Moreira FC, Gomes GF, Cussat GR, Silva BSR, da Silva MCM, de Barros Fernandes H, de Sena Oliveira C, de Oliveira Guarnieri L, Lopes V, Ferreira CN, de Faria AMC, Maioli TU, Ribeiro FM, de Miranda AS, Moraes GSP, de Oliveira ACP, Vieira LB. Chronic hyperpalatable diet induces impairment of hippocampal-dependent memories and alters glutamatergic and fractalkine axis signaling. Sci Rep 2023; 13:16358. [PMID: 37773430 PMCID: PMC10541447 DOI: 10.1038/s41598-023-42955-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 09/16/2023] [Indexed: 10/01/2023] Open
Abstract
Chronic consumption of hyperpalatable and hypercaloric foods has been pointed out as a factor associated with cognitive decline and memory impairment in obesity. In this context, the integration between peripheral and central inflammation may play a significant role in the negative effects of an obesogenic environment on memory. However, little is known about how obesity-related peripheral inflammation affects specific neurotransmission systems involved with memory regulation. Here, we test the hypothesis that chronic exposure to a highly palatable diet may cause neuroinflammation, glutamatergic dysfunction, and memory impairment. For that, we exposed C57BL/6J mice to a high sugar and butter diet (HSB) for 12 weeks, and we investigated its effects on behavior, glial reactivity, blood-brain barrier permeability, pro-inflammatory features, glutamatergic alterations, plasticity, and fractalkine-CX3CR1 axis. Our results revealed that HSB diet induced a decrease in memory reconsolidation and extinction, as well as an increase in hippocampal glutamate levels. Although our data indicated a peripheral pro-inflammatory profile, we did not observe hippocampal neuroinflammatory features. Furthermore, we also observed that the HSB diet increased hippocampal fractalkine levels, a key chemokine associated with neuroprotection and inflammatory regulation. Then, we hypothesized that the elevation on glutamate levels may saturate synaptic communication, partially limiting plasticity, whereas fractalkine levels increase as a strategy to decrease glutamatergic damage.
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Affiliation(s)
- Roberta Ribeiro
- Department of Pharmacology, ICB, Federal University of Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil
| | - Emanuele Guimarães Silva
- Department of Immunology and Biochemistry, ICB, University of Minas Gerais, Belo Horizonte, Brazil
| | - Felipe Caixeta Moreira
- Department of Immunology and Biochemistry, ICB, University of Minas Gerais, Belo Horizonte, Brazil
| | - Giovanni Freitas Gomes
- Center of Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Gabriela Reis Cussat
- Department of Pharmacology, ICB, Federal University of Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil
| | - Barbara Stehling Ramos Silva
- Department of Pharmacology, ICB, Federal University of Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil
| | - Maria Carolina Machado da Silva
- Department of Pharmacology, ICB, Federal University of Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil
| | | | - Carolina de Sena Oliveira
- Department of Pharmacology, ICB, Federal University of Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil
| | | | - Victoria Lopes
- Colégio Técnico, University of Minas Gerais, Belo Horizonte, Brazil
| | | | | | - Tatiani Uceli Maioli
- Department of Immunology and Biochemistry, ICB, University of Minas Gerais, Belo Horizonte, Brazil
| | - Fabíola Mara Ribeiro
- Department of Immunology and Biochemistry, ICB, University of Minas Gerais, Belo Horizonte, Brazil
| | | | | | | | - Luciene Bruno Vieira
- Department of Pharmacology, ICB, Federal University of Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil.
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de Brito SAF, Scianni AA, Silveira BMF, de Oliveira ERM, Mateus ME, Faria CDCDM. Effects of high-intensity respiratory muscle training on respiratory muscle strength in individuals with Parkinson's disease: Protocol of a randomized clinical trial. PLoS One 2023; 18:e0291051. [PMID: 37682839 PMCID: PMC10490961 DOI: 10.1371/journal.pone.0291051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 08/17/2023] [Indexed: 09/10/2023] Open
Abstract
OBJECTIVE To investigate the efficacy of high-intensity respiratory muscle training (combined inspiratory and expiratory muscle training) in improving inspiratory and expiratory muscle strength, inspiratory muscle endurance, peak cough flow, dyspnea, fatigue, exercise capacity, and quality of life in this population. METHODS A randomized controlled trial, concealed allocation, blinded assessments, and intention-to-treat analysis will be carried out. Altogether, 34 individuals with PD (age ≥ 50 years old, with maximum inspiratory pressure (MIP) <80cmH2O or maximum expiratory pressure (MEP) <90cmH2O) will be recruited. Patients will be randomly assigned to either (1) high-intensity respiratory muscle training (experimental group, 60% of MIP and MEP) or (2) sham training (control group, 0cmH2O). Individuals will perform a home-based intervention, with indirect home supervision, consisting of two daily 20-min sessions (morning and afternoon), seven times a week, during eight weeks. Primary outcomes are MIP and MEP. Secondary outcomes are inspiratory muscle endurance, peak cough flow, dyspnea, fatigue, exercise capacity, and quality of life. The effects of the training will be analyzed from the collected data using intention-to-treat. Between-group differences will be measured using a two-way ANOVA with repeated measures (2*3), considering baseline, post-intervention, and 12-week follow-up. IMPACT The results of this trial will provide valuable new information on the efficacy of high-intensity respiratory muscle training in improving muscle strength, functional outcomes, and quality of life in individuals with PD. Performing combined inspiratory and expiratory muscle training using a single equipment is cheaper and feasible, takes less time and is easy to use. In addition, this intervention will be carried out in the home environment that increases accessibility, reduces time, and costs of transport, which increases the feasibility to reproduce their findings in clinical practice. TRIAL REGISTRATION NCT05608941. Registered on November 8, 2022.
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Affiliation(s)
| | - Aline Alvim Scianni
- Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Bruna Mara Franco Silveira
- Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Maria Eduarda Mateus
- Department of Physical Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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de Faria NC, Andrade GMDP, Ruas CM, Claro RM, Braga LVM, Nilson EAF, Anastácio LR. Impact of implementation of front-of-package nutrition labeling on sugary beverage consumption and consequently on the prevalence of excess body weight and obesity and related direct costs in Brazil: An estimate through a modeling study. PLoS One 2023; 18:e0289340. [PMID: 37566577 PMCID: PMC10420370 DOI: 10.1371/journal.pone.0289340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 07/18/2023] [Indexed: 08/13/2023] Open
Abstract
RATIONALE Intake of sugary beverages has been associated with obesity and chronic non-communicable diseases, thereby increasing the direct health costs related to these diseases. Front-of-package nutrition labeling (FoPNL) aims to help consumers understand food composition, thereby improving food choices and preventing the development of such diseases. OBJECTIVE To estimate, over five years, the impact of implementing FoPNL in Brazil on the prevalence of excess body weight and obesity in adults who consume sugary beverages and the direct costs related to such problems. METHODS A simulation study to performed to estimate the effect of FoPNL implementation on the prevalence of excess body weight and obesity. The VIGITEL research database (2019), published in the 2020 report, was used in this study (the final sample consisted of 12,471 data points representing 14,380,032 Brazilians). The scenarios were considered: base (trend in sugary beverage intake); 1 (base scenario associated with the changes in energy content of the purchased beverages observed after the first phase of the Chilean labeling law (-9.9%); and 2 (scenario 1 associated with reformulation of beverages, total energy reduction of -1.6%). Changes in body weight were estimated using the simulation model of Hall et al. (2011) over five years. A linear trend in the prevalence of obesity and excess body weight in the Brazilian population was considered. The impact of the prevalence of obesity and excess body weight on body mass index was estimated. In addition, the direct health costs related to obesity were estimated. RESULTS Energy consumption from sugary beverages after FoPNL implementation is expected to be reduced by approximately 28 kcal/day (95% CI, -30 to -27) considering scenario 1. In scenarios 1 and 2, without FoPNL, the prevalence of obesity and excess body weight over five years was estimated to be 25.3% and 25.2%, and 64.4% and 64.2%, respectively. By extrapolating the results to the entire Brazilian population, it was observed that the implementation of FoPNL may reduce the prevalence of obesity by -0.32 percentage points and -0.35 percentage points (scenario 1 and 2, respectively) and excess body weight by -0.42 percentage points and -0.48 percentage points (scenarios 1 and 2, respectively) in five years. It is estimated that after five years of implementation, it will be possible to save approximately US$ 5,5 millions (95% CI 4,7 to 8,8) in scenario 1, reaching approximately US$ 6,1 millions (95% CI 5,3 to 9,8) in scenario 2. CONCLUSION The results of this modeling study indicate that FoPNL may reduce prevalence of excess body weight and obesity, representing strategic public policies for obesity prevention.
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Affiliation(s)
- Natália Cristina de Faria
- Post-Graduate Program in Food Science, Faculty of Pharmacy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | | | - Cristina Mariano Ruas
- Department of Social Pharmacy, Faculty of Pharmacy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Rafael Moreira Claro
- Department of Nutrition, School of Nursing, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Centre for Epidemiological Research in Nutrition and Health (NUPENS), University of Sao Paulo, Sao Paulo, Brazil
| | - Luíza Vargas Mascarenhas Braga
- Post-Graduate Program in Food Science, Faculty of Pharmacy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Eduardo Augusto Fernandes Nilson
- Centre for Epidemiological Research in Nutrition and Health (NUPENS), University of Sao Paulo, Sao Paulo, Brazil
- Oswaldo Cruz Foundation (Fiocruz) Brasília, Brasilia, Brazil
| | - Lucilene Rezende Anastácio
- Post-Graduate Program in Food Science, Faculty of Pharmacy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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9
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Lyra FTM, Mares CA, Sá AF, Dias DR, Lages FS. Anaerobic adhesives effect on counter-torque of abutment screws on implants with external hexagon and conical connections: An in vitro study. Clin Implant Dent Relat Res 2023. [PMID: 37137326 DOI: 10.1111/cid.13210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/29/2023] [Accepted: 04/16/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Abutment screw loosening is a common complication of implant supported prostheses, especially for single crowns. In engineering, anaerobic adhesives (AA) are used to provide chemical locking between screw surfaces, but their application in implantology remains unclear. PURPOSE The purpose of this article is to evaluate, in vitro, the effect of AA on counter-torque of abutment screws for cemented prosthesis on dental implants with external hexagon connection (EHC) and conical connection (CC). MATERIALS AND METHODS Sample was composed by 60 specimens, 30 dental implants with EHC and 30 with CC. Abutments (transmucosal 3 mm straight universal abutment) were installed without AA (control group) or with application of AA with two different adhesive strength: medium strength (LOCTITE® 242) and high strength (LOCTITE® 277). The specimens were subjected to mechanical cycling at 37°C, with a load setting of 133 N, a 1.3 Hz frequency, and 1 200 000 cycles. The abutments were removed, and the counter-torque values were registered. Screws and implants were inspected using a stereomicroscope to verify the presence of residual adhesive and damage the internal structures. The data were analyzed using descriptive statistics and comparison tests (p < 0.05). RESULTS Comparing to the torque of installation, the medium strength AA kept the counter-torque values for CC implants and the high strength AA kept the counter-torque for EHC implants and increased for CC implants. In the intergroup comparisons, control group presented significantly lower counter-torque values than other groups, both for EHC and CC implants. High strength AA presented similar results to medium strength AA in the EHC implants, but in the CC implants presented higher counter-torque values. Damage in threads was more frequent in the groups that received high strength AA. CONCLUSION The use of AA increased the counter-torque of abutment screws, both in implants with EHC and CC.
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Affiliation(s)
| | - Clara Almeida Mares
- School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Flor Sá
- School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Danilo Rocha Dias
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Frederico Santos Lages
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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10
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Mansur AAP, Rodrigues MA, Capanema NSV, Carvalho SM, Gomes DA, Mansur HS. Functionalized bioadhesion-enhanced carboxymethyl cellulose/polyvinyl alcohol hybrid hydrogels for chronic wound dressing applications. RSC Adv 2023; 13:13156-13168. [PMID: 37124005 PMCID: PMC10140670 DOI: 10.1039/d3ra01519j] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/21/2023] [Indexed: 05/02/2023] Open
Abstract
Wounds produced by trauma, burns, and chronic diseases cause millions of patients to suffer discomfort, pain, and, in many cases, disability and death, leading to enormous health, social and financial impacts globally. Regrettably, current clinical treatments for chronic wounds remain unsatisfactory. Thus, this study reports for the first time the design, development, and synthesis of chemically biofunctionalized hybrid hydrogels made of carboxymethyl cellulose (CMC) and poly(vinyl alcohol) (PVA) crosslinked by citric acid using an entirely biocompatible and green process. They demonstrated suitable physicochemical properties, cytocompatibility, and hemocompatibility to be applied as a smart wound dressing for skin tissue engineering. These novel hybrids were biofunctionalized with l-arginine and RGD peptide through carbodiimide mediated-amide formation to promote bioadhesion of fibroblast and keratinocyte cells as a potential enhancement for wound healing and skin tissue engineering applications.
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Affiliation(s)
- A A P Mansur
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Federal University of Minas Gerais Av. Antônio Carlos 6627 - Escola de Engenharia, Bloco 2 - Sala 2233, 31.270-901 Belo Horizonte MG Brazil +55-31-34091843
| | - M A Rodrigues
- Department of Biochemistry and Immunology, Federal University of Minas Gerais Brazil
| | - N S V Capanema
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Federal University of Minas Gerais Av. Antônio Carlos 6627 - Escola de Engenharia, Bloco 2 - Sala 2233, 31.270-901 Belo Horizonte MG Brazil +55-31-34091843
| | - S M Carvalho
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Federal University of Minas Gerais Av. Antônio Carlos 6627 - Escola de Engenharia, Bloco 2 - Sala 2233, 31.270-901 Belo Horizonte MG Brazil +55-31-34091843
| | - D A Gomes
- Department of Biochemistry and Immunology, Federal University of Minas Gerais Brazil
| | - H S Mansur
- Department of Metallurgical and Materials Engineering, Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Federal University of Minas Gerais Av. Antônio Carlos 6627 - Escola de Engenharia, Bloco 2 - Sala 2233, 31.270-901 Belo Horizonte MG Brazil +55-31-34091843
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11
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Sucupira PHF, Moura TR, Gurgel ILS, Pereira TTP, Padovan ACB, Teixeira MM, Bahia D, Soriani FM. In vitro and in vivo Characterization of Host–Pathogen Interactions of the L3881 Candida albicans Clinical Isolate. Front Microbiol 2022; 13:901442. [PMID: 35898912 PMCID: PMC9309619 DOI: 10.3389/fmicb.2022.901442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/21/2022] [Indexed: 11/21/2022] Open
Abstract
Candida albicans is a human commensal fungus and the etiologic agent of nosocomial infections in immunocompromised individuals. Candida spp. is the most studied human fungal pathogen, and the mechanisms by which this fungus can evade the immune system affecting immunosuppressed individuals have been extensively studied. Most of these studies focus on different species of Candida, and there is much to be understood in virulence variability among lineages, specifically different C. albicans clinical isolates. To better understand the main mechanisms of its virulence variability modulated in C. albicans clinical isolates, we characterized L3881 lineage, which has been previously classified as hypovirulent, and SC5314 lineage, a virulent wild-type control, by using both in vitro and in vivo assays. Our findings demonstrated that L3881 presented higher capacity to avoid macrophage phagocytosis and higher resistance to oxidative stress than the wild type. These characteristics prevented higher mortality rates for L3881 in the animal model of candidiasis. Conversely, L3881 has been able to induce an upregulation of pro-inflammatory mediators both in vitro and in vivo. These results indicated that in vitro and in vivo functional characterizations are necessary for determination of virulence in different clinical isolates due to its modulation in the host–pathogen interactions.
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Affiliation(s)
- Pedro H. F. Sucupira
- Centro de Pesquisa e Desenvolvimento de Fármacos, Laboratório de Genética Funcional, Departamento de Genética Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tauany R. Moura
- Centro de Pesquisa e Desenvolvimento de Fármacos, Laboratório de Genética Funcional, Departamento de Genética Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Isabella L. S. Gurgel
- Centro de Pesquisa e Desenvolvimento de Fármacos, Laboratório de Genética Funcional, Departamento de Genética Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tassia T. P. Pereira
- Centro de Pesquisa e Desenvolvimento de Fármacos, Laboratório de Genética Funcional, Departamento de Genética Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana C. B. Padovan
- Departamento de Microbiologia e Imunologia, Universidade Federal de Alfenas, Alfenas, Brazil
| | - Mauro M. Teixeira
- Centro de Pesquisa e Desenvolvimento de Fármacos, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Diana Bahia
- Departamento de Genética Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Frederico M. Soriani
- Centro de Pesquisa e Desenvolvimento de Fármacos, Laboratório de Genética Funcional, Departamento de Genética Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- *Correspondence: Frederico M. Soriani,
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12
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Viegas FM, Santana JA, Silva BA, Xavier RGC, Bonisson CT, Câmara JLS, Rennó MC, Cunha JLR, Figueiredo HCP, Lobato FCF, Silva ROS. Occurrence and characterization of methicillin-resistant Staphylococcus spp. in diseased dogs in Brazil. PLoS One 2022; 17:e0269422. [PMID: 35657980 PMCID: PMC9165789 DOI: 10.1371/journal.pone.0269422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 05/20/2022] [Indexed: 11/30/2022] Open
Abstract
Staphylococcus pseudintermedius is a major commensal bacterium of the skin and mucosae of dogs and an opportunistic agent responsible for several clinical infections, such as pyoderma, otitis, and surgical wound infections. The emergence of methicillin-resistant S. pseudintermedius (MRSP) has become a problem of great concern in veterinary and human medicine because it is multidrug resistant (MDR) and can also infect humans. This study aimed to identify the occurrence of Staphylococcus spp. in infected patients and investigate the antimicrobial resistance profiles and molecular structure of MRSP isolates. Samples were obtained from two different veterinary clinics; suggestive colonies were submitted to matrix-assisted laser desorption ionization-time of flight (MALDI-ToF) mass spectrometry and confirmed at the species level by polymerase chain reaction (PCR). Sequencing of the 16S rRNA and rpoB genes were used in selected samples that were not identified by MALDI-ToF and by the species-specific PCR. Antimicrobial susceptibility and PCR detection of mecA were performed. MRSP isolates were subjected to multilocus sequence typing. Of all the clinical staphylococci (n = 131), 98 (74.8%) were identified as S. pseudintermedius. Multidrug resistance (resistance to ≥3 classes of antimicrobials) was observed in 63.2% of S. pseudintermedius isolates, and 24.5% of S. pseudintermedius isolates were methicillin-resistant. Half of the MRSP isolates were isolated from surgical site infections. Among the ten sequence types (ST) identified, nine were novel. ST71 was the most prevalent and associated with resistance to fluoroquinolones. Prior antimicrobial therapy, hospitalization, and surgical site infections seemed to be risk factors for MRSP acquisition. The present study showed a high rate of MDR staphylococci in infected dogs. MRSP was isolated from different clinical conditions, mainly surgical site infections. Additionally, this is the first study to extensively investigate the population structure of MRSP in Brazil, which revealed the dispersion of CC71 and nine novel ST. These findings raise concerns for both animal and human health due to the zoonotic potential of this species and limited therapeutic options available for MRSP infections.
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Affiliation(s)
- Flávia Mello Viegas
- Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Brendhal Almeida Silva
- Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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13
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Meirelles ALS, Kurc T, Kong J, Ferreira R, Saltz JH, Teodoro G. Building Efficient CNN Architectures for Histopathology Images Analysis: A Case-Study in Tumor-Infiltrating Lymphocytes Classification. Front Med (Lausanne) 2022; 9:894430. [PMID: 35712087 PMCID: PMC9197439 DOI: 10.3389/fmed.2022.894430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022] Open
Abstract
Background Deep learning methods have demonstrated remarkable performance in pathology image analysis, but they are computationally very demanding. The aim of our study is to reduce their computational cost to enable their use with large tissue image datasets. Methods We propose a method called Network Auto-Reduction (NAR) that simplifies a Convolutional Neural Network (CNN) by reducing the network to minimize the computational cost of doing a prediction. NAR performs a compound scaling in which the width, depth, and resolution dimensions of the network are reduced together to maintain a balance among them in the resulting simplified network. We compare our method with a state-of-the-art solution called ResRep. The evaluation is carried out with popular CNN architectures and a real-world application that identifies distributions of tumor-infiltrating lymphocytes in tissue images. Results The experimental results show that both ResRep and NAR are able to generate simplified, more efficient versions of ResNet50 V2. The simplified versions by ResRep and NAR require 1.32× and 3.26× fewer floating-point operations (FLOPs), respectively, than the original network without a loss in classification power as measured by the Area under the Curve (AUC) metric. When applied to a deeper and more computationally expensive network, Inception V4, NAR is able to generate a version that requires 4× lower than the original version with the same AUC performance. Conclusions NAR is able to achieve substantial reductions in the execution cost of two popular CNN architectures, while resulting in small or no loss in model accuracy. Such cost savings can significantly improve the use of deep learning methods in digital pathology. They can enable studies with larger tissue image datasets and facilitate the use of less expensive and more accessible graphics processing units (GPUs), thus reducing the computing costs of a study.
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Affiliation(s)
| | - Tahsin Kurc
- Biomedical Informatics Department, Stony Brook University, Stony Brook, NY, United States
| | - Jun Kong
- Department of Mathematics and Statistics and Computer Science, Georgia State University, Atlanta, GA, United States
| | - Renato Ferreira
- Department of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Joel H. Saltz
- Biomedical Informatics Department, Stony Brook University, Stony Brook, NY, United States
| | - George Teodoro
- Department of Computer Science, Universidade de Brasília, Brasília, Brazil
- Department of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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14
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Santos RPM, Ribeiro R, Ferreira-Vieira TH, Aires RD, de Souza JM, Oliveira BS, Lima ALD, de Oliveira ACP, Reis HJ, de Miranda AS, Vieira EML, Ribeiro FM, Vieira LB. Metabotropic glutamate receptor 5 knockout rescues obesity phenotype in a mouse model of Huntington's disease. Sci Rep 2022; 12:5621. [PMID: 35379852 PMCID: PMC8980063 DOI: 10.1038/s41598-022-08924-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 02/17/2022] [Indexed: 12/12/2022] Open
Abstract
Obesity represents a global health problem and is characterized by metabolic dysfunctions and a low-grade chronic inflammatory state, which can increase the risk of comorbidities, such as atherosclerosis, diabetes and insulin resistance. Here we tested the hypothesis that the genetic deletion of metabotropic glutamate receptor 5 (mGluR5) may rescue metabolic and inflammatory features present in BACHD mice, a mouse model of Huntington's disease (HD) with an obese phenotype. For that, we crossed BACHD and mGluR5 knockout mice (mGluR5-/-) in order to obtain the following groups: Wild type (WT), mGluR5-/-, BACHD and BACHD/mGluR5-/- (double mutant mice). Our results showed that the double mutant mice present decreased body weight as compared to BACHD mice in all tested ages and reduced visceral adiposity as compared to BACHD at 6 months of age. Additionally, 12-month-old double mutant mice present increased adipose tissue levels of adiponectin, decreased leptin levels, and increased IL-10/TNF ratio as compared to BACHD mice. Taken together, our preliminary data propose that the absence of mGluR5 reduce weight gain and visceral adiposity in BACHD mice, along with a decrease in the inflammatory state in the visceral adipose tissue (VAT), which may indicate that mGluR5 may play a role in adiposity modulation.
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Affiliation(s)
- Rebeca P M Santos
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Roberta Ribeiro
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Talita H Ferreira-Vieira
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil
- Faculdade Sete Lagoas, Sete Lagoas, Brazil
| | - Rosaria D Aires
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
- Faculdade Sete Lagoas, Sete Lagoas, Brazil
| | - Jessica M de Souza
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil
| | - Bruna S Oliveira
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Anna Luiza D Lima
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Antônio Carlos P de Oliveira
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Helton J Reis
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Aline S de Miranda
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Erica M L Vieira
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Fabiola M Ribeiro
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil.
| | - Luciene B Vieira
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil.
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15
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Andrade PHM, Gomes ALM, Palhares HG, Volkringer C, Moissette A, Victória HFV, Hatem NMA, Krambrock K, Houmard M, Nunes EHM. Post-synthetic modification of aluminum trimesate and copper trimesate with TiO 2 nanoparticles for photocatalytic applications. J Mater Sci 2022; 57:4481-4503. [PMID: 35125514 PMCID: PMC8796608 DOI: 10.1007/s10853-021-06842-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Organic pollutants have been a significant source of concern in recent years due to their facile dissemination and harmful effects. In this work, two different metal-organic frameworks (MOFs) were initially prepared by hydrothermal treatment, namely aluminum trimesate (MIL-100(Al)) and copper trimesate (HKUST-1). These materials were subsequently submitted to a post-synthetic modification step to grow titania nanoparticles on their surface. Anatase nanoparticles with sizes around 5 nm were successfully anchored on MIL-100(Al), and the concentration of TiO2 in this sample was about 68 wt.%. This is the first time that this composite (TiO2@MIL-100(Al)) is reported in the literature. It showed an improved photocatalytic activity, removing 90% of methylene blue (k app = 1.29 h-1), 55% of sodium diclofenac (k app = 0.21 h-1), and 62% of ibuprofen (k app = 0.37 h-1) after four hours of illumination with UV-A light. A significant concentration (14 µM) of reactive oxygen species (ROS) was detected for this composite. HKUST-1 showed a structural collapse during its post-synthetic modification, leading to a non-porous material and providing fewer sites for the heterogeneous nucleation of titania. This behavior led to a low concentration of rutile nanoparticles on HKUST-1 (9 wt.%). However, the obtained composite (TiO2@HKUST) also showed an improved photoactivity compared to HKUST-1, increasing the photodegradation rates evaluated for methylene blue (0.05 h-1 vs. 0.29 h-1), sodium diclofenac (negligible vs. 0.03 h-1), and ibuprofen (0.01 h-1 vs. 0.02 h-1). This work brings new insights concerning the preparation of photocatalysts by growing semiconductor nanoparticles on trimesate-based MOFs.
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Affiliation(s)
- Pedro H. M. Andrade
- Departamento de Engenharia Metalúrgica E de Materiais, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
- Laboratoire de Spectroscopie Pour Les Interactions, La Réactivité Et L’Environnement, Université de Lille—Sciences et Technologies, 59655 Villeneuve d’Ascq, France
| | - Ana L. M. Gomes
- Departamento de Engenharia Metalúrgica E de Materiais, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
| | - Hugo G. Palhares
- Departamento de Engenharia Metalúrgica E de Materiais, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
| | - Christophe Volkringer
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, UCCS—Unité de Catalyse Et Chimie du Solide, 59000 Lille, France
| | - Alain Moissette
- Laboratoire de Spectroscopie Pour Les Interactions, La Réactivité Et L’Environnement, Université de Lille—Sciences et Technologies, 59655 Villeneuve d’Ascq, France
| | - Henrique F. V. Victória
- Departamento de Física, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
| | - Nádia M. A. Hatem
- Departamento de Física, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
| | - Klaus Krambrock
- Departamento de Física, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
| | - Manuel Houmard
- Departamento de Engenharia Química, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
| | - Eduardo H. M. Nunes
- Departamento de Engenharia Metalúrgica E de Materiais, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901 Brazil
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16
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Andrade TA, Fahel JS, de Souza JM, Terra AC, Souza DG, Costa VV, Teixeira MM, Bloise E, Ribeiro FM. In Utero Exposure to Zika Virus Results in sex-Specific Memory Deficits and Neurological Alterations in Adult Mice. ASN Neuro 2022; 14:17590914221121257. [PMID: 36017573 PMCID: PMC9421007 DOI: 10.1177/17590914221121257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 11/15/2022] Open
Abstract
SUMMARY STATEMENT In utero exposure to ZIKV leads to decreased number of neurons in adult mice. Female mice exposed to ZIKV in utero exhibit lower levels of BDNF, a decrease in synaptic markers, memory deficits, and risk-taking behavior during adulthood.
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Affiliation(s)
- Thiago A. Andrade
- Department of Biochemistry and Immunology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Julia S. Fahel
- Department of Biochemistry and Immunology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Jessica M. de Souza
- Department of Biochemistry and Immunology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Ana C. Terra
- Department of Biochemistry and Immunology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Danielle G. Souza
- Department of Microbiology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Vivian V. Costa
- Department of Morphology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Mauro M. Teixeira
- Department of Biochemistry and Immunology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Enrrico Bloise
- Department of Morphology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Fabiola M. Ribeiro
- Department of Biochemistry and Immunology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
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Ramos CP, Diniz AN, Leite SM, Lobato FCF, Pereira ST, Rennó MC, de Oliveira Ferreira E, Silva ROS. Evaluation of an immunochromatographic test for the detection of glutamate dehydrogenase for the diagnosis of Clostridioides (Clostridium) difficile infection in dogs. Braz J Microbiol 2021; 52:2555-2558. [PMID: 34562233 PMCID: PMC8578347 DOI: 10.1007/s42770-021-00615-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 09/19/2021] [Indexed: 01/05/2023] Open
Abstract
This study aimed to evaluate an immunochromatographic test used to detect glutamate dehydrogenase (GDH) for the diagnosis of Clostridium difficile infection (CDI) in dogs. Fecal samples of 119 diarrheic dogs were subjected to toxigenic culture as the "gold standard" method and to GDH detection (Ecodiagnostica, Brazil). Samples positive for toxigenic C. difficile strains and those positive in the GDH test were also subjected to A/B toxin detection using an enzyme immunoassay kit (C. difficile Tox A/B II, Techlab Inc., USA). Sensitivity, specificity, and positive and negative predictive values (PPV and NPV, respectively) were measured for GDH detection and compared with the toxigenic culture results. A total of 19 (15.9%) dogs were positive for toxigenic C. difficile. Of these, 10 (52.6%) dogs were positive for A/B toxins using the enzyme immunoassay kit and 18 (15.2%) were positive in the GDH test, leading to a sensitivity and NPV of 89.4% and 97.9%, respectively. Three animals, two of which were colonized with non-toxigenic strains, were positive for GDH, though not confirmed with CDI, resulting in a high specificity (97%) and PPV (85%). The results suggest that the lateral flow test for GDH detection could be a useful method for diagnosing CDI in dogs, similar to that previously described for humans and other animal species.
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Affiliation(s)
- Carolina Pantuzza Ramos
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | - Amanda Nádia Diniz
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | - Suzana Martins Leite
- IMPG, Depto. de Microbiologia Médica, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Francisco Carlos Faria Lobato
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | | | | | | | - Rodrigo Otávio Silveira Silva
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil.
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Nogueira DS, de Oliveira LM, Amorim CCO, Gazzinelli-Guimarães AC, Barbosa FS, Oliveira FMS, Kraemer L, Mattos M, Cardoso MS, Resende NM, Clímaco MDC, Negrão-Corrêa DA, Faria AMC, Caliari MV, Bueno LL, Gaze S, Russo RC, Gazzinelli-Guimarães PH, Fujiwara RT. Eosinophils mediate SIgA production triggered by TLR2 and TLR4 to control Ascaris suum infection in mice. PLoS Pathog 2021; 17:e1010067. [PMID: 34784389 PMCID: PMC8631680 DOI: 10.1371/journal.ppat.1010067] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 11/30/2021] [Accepted: 10/25/2021] [Indexed: 12/15/2022] Open
Abstract
Human ascariasis is the most prevalent but neglected tropical disease in the world, affecting approximately 450 million people. The initial phase of Ascaris infection is marked by larval migration from the host's organs, causing mechanical injuries followed by an intense local inflammatory response, which is characterized mainly by neutrophil and eosinophil infiltration, especially in the lungs. During the pulmonary phase, the lesions induced by larval migration and excessive immune responses contribute to tissue remodeling marked by fibrosis and lung dysfunction. In this study, we investigated the relationship between SIgA levels and eosinophils. We found that TLR2 and TLR4 signaling induces eosinophils and promotes SIgA production during Ascaris suum infection. Therefore, control of parasite burden during the pulmonary phase of ascariasis involves eosinophil influx and subsequent promotion of SIgA levels. In addition, we also demonstrate that eosinophils also participate in the process of tissue remodeling after lung injury caused by larval migration, contributing to pulmonary fibrosis and dysfunction in re-infected mice. In conclusion, we postulate that eosinophils play a central role in mediating host innate and humoral immune responses by controlling parasite burden, tissue inflammation, and remodeling during Ascaris suum infection. Furthermore, we suggest that the use of probiotics can induce eosinophilia and SIgA production and contribute to controlling parasite burden and morbidity of helminthic diseases with pulmonary cycles.
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Affiliation(s)
- Denise Silva Nogueira
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luciana Maria de Oliveira
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Centro de Ciências Biológicas e da Saúde, Universidade Federal de Sergipe, Aracajú, Brazil
| | - Chiara Cássia Oliveira Amorim
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Clara Gazzinelli-Guimarães
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Fabrício Marcus Silva Oliveira
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lucas Kraemer
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Matheus Mattos
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mariana Santos Cardoso
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Marianna de Carvalho Clímaco
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Ana Maria Caetano Faria
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marcelo Vidigal Caliari
- Department of Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lilian Lacerda Bueno
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Soraya Gaze
- René Rachou Institute, Oswaldo Cruz Foundation–FIOCRUZ, Belo Horizonte, Brazil
| | - Remo Castro Russo
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Ricardo Toshio Fujiwara
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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19
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Leal-Silva T, Vieira-Santos F, Oliveira FMS, Padrão LDLS, Kraemer L, da Paixão Matias PH, de Almeida Lopes C, Loiola Ruas AC, de Azevedo IC, Nogueira DS, Rachid MA, Caliari MV, Castro Russo R, Fujiwara RT, Bueno LL. Detrimental role of IL-33/ST2 pathway sustaining a chronic eosinophil-dependent Th2 inflammatory response, tissue damage and parasite burden during Toxocara canis infection in mice. PLoS Negl Trop Dis 2021; 15:e0009639. [PMID: 34324507 PMCID: PMC8354467 DOI: 10.1371/journal.pntd.0009639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 08/10/2021] [Accepted: 07/09/2021] [Indexed: 12/23/2022] Open
Abstract
Toxocariasis is a neglected disease that affects people around the world. Humans become infected by accidental ingestion of eggs containing Toxocara canis infective larvae, which upon reaching the intestine, hatch, penetrate the mucosa and migrate to various tissues such as liver, lungs and brain. Studies have indicated that Th2 response is the main immune defense mechanism against toxocariasis, however, there are still few studies related to this response, mainly the IL-33/ST2 pathway. Some studies have reported an increase in IL-33 during helminth infections, including T. canis. By binding to its ST2 receptor, IL-33 stimulating the Th2 polarized immune cell and cytokine responses. Thus, we aimed to investigate the role of the IL-33/ST2 pathway in the context of T. canis larval migration and the immunological and pathophysiological aspects of the infection in the liver, lungs and brain from Wild-Type (WT) BALB/c background and genetically deficient mice for the ST2 receptor (ST2-/-). The most important findings revealed that the IL-33/ST2 pathway is involved in eosinophilia, hepatic and cerebral parasitic burden, and induces the formation of granulomas related to tissue damage and pulmonary dysfunction. However, ST2-/- mice, the immune response was skewed to Th1/Th17 type than Th2, that enhanced the control of parasite burden related to IgG2a levels, tissue macrophages infiltration and reduced lung dysfunction. Collectively, our results demonstrate that the Th2 immune response triggered by IL-33/ST2 pathway mediates susceptibility to T. canis, related to parasitic burden, eosinophilia and granuloma formation in which consequently contributes to tissue inflammation and injury. Toxocariasis is a neglected disease caused by Toxocara canis, which has 19% worldwide seroprevalence, and is associated with socioeconomic, geographic and environmental factors. Humans become infected by accidental ingestion of T. canis eggs present in contaminated food, water or soil. After ingestion, the larvae hatch in the intestine and can reach various tissues such as liver, lung and brain. Helminth infections usually trigger a Th2 immune response in the host, by releasing cytokines such as IL-4, IL-5, IL-13 and IL-33. IL-33 is an alarmin that binds to the ST2 receptor, and some studies have observed an increase in this cytokine in toxocariasis, however there are no studies regarding the IL-33/ST2 role in this infection. Thus, we evaluated the influence of this pathway by analyzing immunological and pathophysiological aspects in T. canis-infected mice. Our results demonstrated that the IL-33/ST2 pathway is related to parasite burden on the liver and brain and also increases the number of eosinophils in the blood and tissues. In addition, it involved with the pulmonary immune response and granulomas with impact in lung function. In conclusion, the IL-33/ST2 pathway governs the host susceptibility to T. canis in mice.
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Affiliation(s)
- Thaís Leal-Silva
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Post-graduation Program in Health Sciences: Infectious Diseases and Tropical Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Flaviane Vieira-Santos
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fabrício Marcus Silva Oliveira
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luiza de Lima Silva Padrão
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lucas Kraemer
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Pablo Hemanoel da Paixão Matias
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Camila de Almeida Lopes
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Cristina Loiola Ruas
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Isabella Carvalho de Azevedo
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Denise Silva Nogueira
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Milene Alvarenga Rachid
- Laboratory of Protozooses, Department of General Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marcelo Vidigal Caliari
- Laboratory of Protozooses, Department of General Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Remo Castro Russo
- Laboratory of Pulmonary Immunology and Mechanics, Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ricardo Toshio Fujiwara
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lilian Lacerda Bueno
- Laboratory of Immunology and Genomics of Parasites, Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- * E-mail:
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20
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Cordeiro DA, Costa GMJ, França LR. Testis structure, duration of spermatogenesis and daily sperm production in four wild cricetid rodent species (A. cursor, A. montensis, N. lasiurus, and O. nigripes). PLoS One 2021; 16:e0251256. [PMID: 34014973 PMCID: PMC8136699 DOI: 10.1371/journal.pone.0251256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 04/23/2021] [Indexed: 11/24/2022] Open
Abstract
Although rodents represent approximately 40% of all living mammalian species, our knowledge regarding their reproductive biology is still scarce. Due to their high vulnerability to environmental changes, wild rodents have become beneficial models for ecological studies. Thus, we aimed to comparatively investigate key functional testis parameters in four sexually mature wild rodent species (A. cursor, A. montensis, N. lasiurus, and O. nigripes). These species belong to the Cricetidae family, which is the most diverse family of rodents in South America, with a total of ~120 species in Brazil. The results found for the gonadosomatic index and the sickled sperm head shape observed strongly suggest that the species here evaluated are promiscuous, prolific, and short-lived. The duration of spermatogenesis was relatively short and varied from ~35–40 days. Both the percentage of seminiferous tubules (ST) in the testis parenchyma (~95–97%) and the number of Sertoli cells (SC) (~48–70 million) per testis gram were very high, whereas a fairly good SC efficiency (~8–13 round spermatids per SC) was observed. In comparison to other mammalian species studied, particularly the rodents of the suborder Myomorpha (i.e. hamsters, rats and mice), the rodents herein investigated exhibited very high (~62–80 million) daily sperm production per testis gram. This impressive spermatogenic efficiency resulted mainly from the short duration of spermatogenesis and quite high values found for the ST percentage in the testis and the SC number per testis gram. We expect that the knowledge here obtained will help conservation programs and the proper management of wildlife.
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Affiliation(s)
- Dirceu A. Cordeiro
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais—UFMG, Belo Horizonte, MG, Brazil
- UNINCOR, Três Corações, MG, Brazil
| | - Guilherme M. J. Costa
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais—UFMG, Belo Horizonte, MG, Brazil
| | - Luiz R. França
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais—UFMG, Belo Horizonte, MG, Brazil
- * E-mail:
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21
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Gomes MTR, Guimarães ES, Marinho FV, Macedo I, Aguiar ERGR, Barber GN, Moraes-Vieira PMM, Alves-Filho JC, Oliveira SC. STING regulates metabolic reprogramming in macrophages via HIF-1α during Brucella infection. PLoS Pathog 2021; 17:e1009597. [PMID: 33989349 PMCID: PMC8153530 DOI: 10.1371/journal.ppat.1009597] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 05/26/2021] [Accepted: 04/30/2021] [Indexed: 12/18/2022] Open
Abstract
Macrophages metabolic reprogramming in response to microbial insults is a major determinant of pathogen growth or containment. Here, we reveal a distinct mechanism by which stimulator of interferon genes (STING), a cytosolic sensor that regulates innate immune responses, contributes to an inflammatory M1-like macrophage profile upon Brucella abortus infection. This metabolic reprogramming is induced by STING-dependent stabilization of hypoxia-inducible factor-1 alpha (HIF-1α), a global regulator of cellular metabolism and innate immune cell functions. HIF-1α stabilization reduces oxidative phosphorylation and increases glycolysis during infection with B. abortus and, likewise, enhances nitric oxide production, inflammasome activation and IL-1β release in infected macrophages. Furthermore, the induction of this inflammatory profile participates in the control of bacterial replication since absence of HIF-1α renders mice more susceptible to B. abortus infection. Mechanistically, activation of STING by B. abortus infection drives the production of mitochondrial reactive oxygen species (mROS) that ultimately influences HIF-1α stabilization. Moreover, STING increases the intracellular succinate concentration in infected macrophages, and succinate pretreatment induces HIF-1α stabilization and IL-1β release independently of its cognate receptor GPR91. Collectively, these data demonstrate a pivotal mechanism in the immunometabolic regulation of macrophages during B. abortus infection that is orchestrated by STING via HIF-1α pathway and highlight the metabolic reprogramming of macrophages as a potential treatment strategy for bacterial infections. The impact of host cell metabolism on pathogen growth or restriction represent an emerging field in immunology and shed light on the intricate network of signaling pathways during immune cells response. Here, we dissected a distinct mechanism by which STING regulates macrophage metabolic reprogramming eliciting an inflammatory profile during Brucella infection. Brucella abortus is an intracellular bacterium that causes brucellosis, an infectious disease that promotes abortion in domestic animals leading to severe economic losses and an inflammatory condition in humans. The metabolite reprogramming orchestrated by STING relies on HIF-1α stabilization through increased succinate and mROS levels. We demonstrated that HIF-1α stabilization enhances nitric oxide production, inflammasome activation and IL-1β release in infected macrophages, and this inflammatory profile participates in the control of bacterial replication. Thus, our findings bring new insights on this intricate circuit by which the host immune senses intracellular pathogens contributing to development of drugs and/or vaccines to control infectious diseases.
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Affiliation(s)
- Marco Tulio R. Gomes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Erika S. Guimarães
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Departamento de Genética, Ecologia e Evolução, Programa de Pós-Graduação em Genética, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fabio V. Marinho
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Isabella Macedo
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Eric R. G. R. Aguiar
- Departmento de Ciências Biológicas, Centro de Biotecnologia e Genética, Universidade Estadual de Santa Cruz, Ilhéus, Bahia, Brazil
| | - Glen N. Barber
- Department of Cell Biology, University of Miami, Miami, Florida
| | - Pedro M. M. Moraes-Vieira
- Departmento de Genética, Evolução, Microbiologia e Imunologia, Universidade Estadual de Campinas, Campinas São Paulo, Brazil
| | - José Carlos Alves-Filho
- Departmento de Farmacologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Sergio C. Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), CNPq MCT, Salvador, Bahia, Brazil
- * E-mail:
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22
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Leonel AG, Mansur AAP, Carvalho SM, Outon LEF, Ardisson JD, Krambrock K, Mansur HS. Tunable magnetothermal properties of cobalt-doped magnetite-carboxymethylcellulose ferrofluids: smart nanoplatforms for potential magnetic hyperthermia applications in cancer therapy. Nanoscale Adv 2021; 3:1029-1046. [PMID: 36133299 PMCID: PMC9416810 DOI: 10.1039/d0na00820f] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 01/02/2021] [Indexed: 05/09/2023]
Abstract
Magnetite nanoparticles are one of the most promising ferrofluids for hyperthermia applications due to the combination of unique physicochemical and magnetic properties. In this study, we designed and produced superparamagnetic ferrofluids composed of magnetite (Fe3O4, MION) and cobalt-doped magnetite (Co x -MION, x = 3, 5, and 10% mol of cobalt) nanoconjugates through an eco-friendly aqueous method using carboxymethylcellulose (CMC) as the biocompatible macromolecular ligand. The effect of the gradual increase of cobalt content in Fe3O4 nanocolloids was investigated in-depth using XRD, XRF, XPS, FTIR, DLS, zeta potential, EMR, and VSM analyses. Additionally, the cytotoxicity of these nanoconjugates and their ability to cause cancer cell death through heat induction were evaluated by MTT assays in vitro. The results demonstrated that the progressive substitution of Co in the magnetite host material significantly affected the magnetic anisotropy properties of the ferrofluids. Therefore, Co-doped ferrite (Co x Fe(3-x)O4) nanoconjugates enhanced the cell-killing activities in magnetic hyperthermia experiments under alternating magnetic field performed with human brain cancer cells (U87). On the other hand, the Co-doping process retained the pristine inverse spinel crystalline structure of MIONs, and it has not significantly altered the average nanoparticle size (ca.∼7.1 ± 1.6 nm). Thus, the incorporation of cobalt into magnetite-polymer nanostructures may constitute a smart strategy for tuning their magnetothermal capability towards cancer therapy by heat generation.
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Affiliation(s)
- Alice G Leonel
- Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais - UFMG Av. Antônio Carlos 6627 - Belo Horizonte/MG Brazil
| | - Alexandra A P Mansur
- Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais - UFMG Av. Antônio Carlos 6627 - Belo Horizonte/MG Brazil
| | - Sandhra M Carvalho
- Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais - UFMG Av. Antônio Carlos 6627 - Belo Horizonte/MG Brazil
| | - Luis Eugenio F Outon
- Departament of Physics, Federal University of Minas Gerais - UFMG Av. Antônio Carlos, 6627 - Escola de Engenharia, Bloco 2 - Sala 2233 Belo Horizonte/MG 31.270-901 Brazil +55-31-34091843 +55-31-34091843
| | - José Domingos Ardisson
- Centro de Desenvolvimento da Tecnologia Nuclear - CDTN Av. Antônio Carlos 6627 - Belo Horizonte MG Brazil
| | - Klaus Krambrock
- Departament of Physics, Federal University of Minas Gerais - UFMG Av. Antônio Carlos, 6627 - Escola de Engenharia, Bloco 2 - Sala 2233 Belo Horizonte/MG 31.270-901 Brazil +55-31-34091843 +55-31-34091843
| | - Herman S Mansur
- Center of Nanoscience, Nanotechnology and Innovation - CeNano2I, Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais - UFMG Av. Antônio Carlos 6627 - Belo Horizonte/MG Brazil
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23
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Ramos CP, Lopes EO, Oliveira Júnior CA, Diniz AN, Lobato FCF, Silva ROS. Immunochromatographic test and ELISA for the detection of glutamate dehydrogenase (GDH) and A/B toxins as an alternative for the diagnosis of Clostridioides (Clostridium) difficile-associated diarrhea in foals and neonatal piglets. Braz J Microbiol 2020; 51:1459-1462. [PMID: 32363568 PMCID: PMC7455628 DOI: 10.1007/s42770-020-00275-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 04/15/2020] [Indexed: 01/05/2023] Open
Abstract
Considering the lack of studies evaluating the performance of commercially available methods for diagnosis of Clostridioides (Clostridium) difficile infection (CDI) in animals, the present study aimed to assess an immunochromatographic test for detection of glutamate dehydrogenase (GDH) and A/B toxins of C. difficile, also evaluated by an ELISA kit, in foals and neonatal piglets. Intestinal contents of 47 piglets and feces of 35 foals were tested to GDH antigen and A/B toxins in a lateral flow method (Ecodiagnostica, Brazil). Also, these samples were submitted to A/B toxin detection by an ELISA kit (C. difficile Tox A/B II, Techlab Inc., USA), using the toxigenic culture (TC) as the reference method. The GDH component of the lateral flow test showed sensitivity and negative predictive value (NPV) of 100% and a high specificity in samples of piglets (82.61%) and foals (100%). Detection of A/B toxins using the lateral flow test and the ELISA resulted in a specificity of 100% in samples of both species. On the other hand, the sensibility ranged from 54.2 to 90% for the ELISA and from 12.5 to 60% for the lateral flow test for piglets' and foals' samples, respectively. In conclusion, the present work suggests that the lateral flow test for GDH detection could be a useful method for diagnosing CDI in these species. On the other hand, the low sensitivity of the lateral flow test for A/B toxins might compromise its utility in piglets.
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Affiliation(s)
- Carolina Pantuzza Ramos
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, Belo Horizonte, MG, Brazil
| | - Emily Oliveira Lopes
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, Belo Horizonte, MG, Brazil
| | | | - Amanda Nádia Diniz
- Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, Belo Horizonte, MG, Brazil
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24
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Ramos CP, Lopes EO, Diniz AN, Lobato FCF, Vilela EG, Silva ROS. Evaluation of glutamate dehydrogenase (GDH) and toxin A/B rapid tests for Clostridioides (prev. Clostridium) difficile diagnosis in a university hospital in Minas Gerais, Brazil. Braz J Microbiol 2020; 51:1139-1143. [PMID: 32367261 PMCID: PMC7455615 DOI: 10.1007/s42770-020-00288-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 04/25/2020] [Indexed: 12/12/2022] Open
Abstract
Clostridioides (Clostridium) difficile is responsible for most cases of nosocomial diarrhea and, despite the high prevalence of the disease worldwide, the best laboratory diagnostic approach to diagnose C. difficile infection (CDI) is a subject of ongoing debate. Although the use of multiple tests is recommended, the cost of these algorithms commonly exceeds the affordability in some countries. Thus, to improve CDI diagnosis in a university hospital in Brazil, this study analyzed two immunochromatographic tests and one enzyme immunoassay (ELISA) to evaluate the detection of glutamate dehydrogenase (GDH) and A/B toxins of C. difficile. Stool samples of 89 adult patients presenting nosocomial diarrhea during hospitalization were included. The toxigenic culture was used as the reference method. GDH detection by both commercial tests showed high sensitivity (100%) and specificity (92.1%). On the other hand, toxin-based methods showed a sensitivity between 19.2 and 57.7%. In conclusion, the results suggest that rapid tests for GDH detection are not only suitable for CDI diagnosis as screening tests but also as a single method.
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Affiliation(s)
- Carolina Pantuzza Ramos
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | - Emily Oliveira Lopes
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | - Amanda Nádia Diniz
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | - Francisco Carlos Faria Lobato
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil
| | - Eduardo Garcia Vilela
- Faculty of Medicine, Federal University of Minas Gerais, Prof. Alfredo Balena Avenue, 190, Belo Horizonte, MG, 30.130-100, Brazil
- Alfa Institute of Gastroenterology, Clinical Hospital of Federal University of Minas Gerais, Prof. Alfredo Balena Avenue, 110, Belo Horizonte, MG, 30.130-100, Brazil
| | - Rodrigo Otávio Silveira Silva
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil.
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Viegas FM, Ramos CP, Xavier RGC, Lopes EO, Júnior CAO, Bagno RM, Diniz AN, Lobato FCF, Silva ROS. Fecal shedding of Salmonella spp., Clostridium perfringens, and Clostridioides difficile in dogs fed raw meat-based diets in Brazil and their owners' motivation. PLoS One 2020; 15:e0231275. [PMID: 32287295 PMCID: PMC7156072 DOI: 10.1371/journal.pone.0231275] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/19/2020] [Indexed: 12/12/2022] Open
Abstract
The present study aimed to explore the motivations of Brazilian dog owners and their knowledge about the risks related to raw meat-based diets (RMBD) as well as to evaluate important enteropathogens such as Salmonella spp., C. perfringens, and C. difficile, in feces of dogs fed different diets. The majority of the pet owners (69.3%) reported to have chosen this diet for their dogs, considering it to be more “natural”. A large number of owners declared that RMBD do not pose health risks for their animals (87.9%) or humans (98.8%), even though almost one third of the respondents (34.8%) declared having at least one individual at high risk of infection in contact with RMBD-fed dogs. Stool samples from 46 RMBD-fed dogs and 192 dogs fed commercial dry feed were collected. The present study revealed that dogs fed raw meat diets were almost 30 times more likely to be positive for Salmonella spp. than dogs on a conventional diet. Some of the serovars detected were commonly associated with human salmonellosis, such as S. Typhimurium and S. Saintpaul, and were multidrug resistant. RMBD-fed dogs were more likely to be positive for C. perfringens type A (p = 0.008) and one C. perfringens type F was isolated from these animals. Two toxigenic strains (4.3%) of C. difficile were isolated only from raw meat-fed dogs, all of which were under antibiotic therapy. These toxigenic C. difficile isolates were classified as RT106/ST54 and RT600/ST149, previously associated with infection in dogs and humans. The present work revealed that the owners have a tendency to ignore or are unaware of the risks associated with raw meat diets for dogs. Also, the higher fecal shedding of important enteropathogens in dogs fed RMBD suggests that this diet poses a risk for the animals and the people in contact with them.
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Affiliation(s)
- Flavia Mello Viegas
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Carolina Pantuzza Ramos
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Rafael Gariglio Clark Xavier
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Emily Oliveira Lopes
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Carlos Augusto Oliveira Júnior
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Renata Marques Bagno
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Amanda Nadia Diniz
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Francisco Carlos Faria Lobato
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Rodrigo Otávio Silveira Silva
- Department of Preventive Veterinary Medicine Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
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de Oliveira Lima MD, da Silva TPR, de Menezes MC, Mendes LL, Pessoa MC, de Araújo LPF, Andrade RGC, D’Assunção ADM, Manzo BF, dos Reis Corrêa A, Santos FBO, Lachtim SAF, de Freitas GL, de Andrade LAV, de Sousa MA, Matozinhos FP. Environmental and individual factors associated with quality of life of adults who underwent bariatric surgery: a cohort study. Health Qual Life Outcomes 2020; 18:87. [PMID: 32228607 PMCID: PMC7106729 DOI: 10.1186/s12955-020-01331-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 03/18/2020] [Indexed: 12/29/2022] Open
Abstract
INTRODUCTION Obesity is a multifactorial chronic condition associated with genetic, behavioral and environmental factors. Understanding the role of the built and social environment in Quality of Life (QOL) is critical to reducing the negative impacts of the environment on health. OBJECTIVE To estimate the built and social environmental and individual factors that influence the QOL of adults who underwent bariatric surgery. METHODS A prospective cohort study conducted with adults who underwent bariatric surgery. Using longitudinal linear regression analysis, we verified the association between the domains of World Health Organization Quality of Life in version bref (WHOQOL-Bref) - General QOL and domains psychological, physical health, social relations and environment - and possible influencing factors. RESULTS The increase in Body Mass Index (BMI) reduces on average 0.47 points in physical domain assessment score. The increase of healthy establishments within the buffer increases on average 0.52 points in the physical domain score. Being female reduces, on average, 5.35 points in the psychological domain evaluation score. Adults who practiced less than 150 min a week of leisure-time physical activity had a 3.27 point average reduction in the social relations domain assessment score. The increase in the number of Supermarkets and Hypermarkets in the buffer increases on average 2.18 points from the Social Relations domain score. CONCLUSIONS Individual and contextual factors were associated with the QOL of adults who underwent bariatric surgery. Although the surgery yields positive results, the maintenance of same is strongly related to changes in lifestyle, the built environment and multi-professional guidance.
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Affiliation(s)
- Marina Dayrell de Oliveira Lima
- Postgraduate Program in Nursing, School of Nursing, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - Thales Philipe Rodrigues da Silva
- Postgraduate Program in Health Sciences, Child and Adolescent Health, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - Mariana Carvalho de Menezes
- Departament of Clinical and Social Nutrition, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais Brazil
| | - Larissa Loures Mendes
- Department of Nutrition, School of Nursing, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - Milene Cristine Pessoa
- Department of Nutrition, School of Nursing, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | | | | | | | - Bruna Figueiredo Manzo
- Department of Maternal Child Nursing and Public Health, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - Allana dos Reis Corrêa
- Basic Nursing Departament, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | | | | | - Giselle Lima de Freitas
- Department of Maternal Child Nursing and Public Health, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | | | - Marco Aurélio de Sousa
- Postgraduate Program in Nursing, School of Nursing, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - Fernanda Penido Matozinhos
- Department of Maternal Child Nursing and Public Health, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
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Martins VD, Silva FC, Caixeta F, Carneiro MB, Goes GR, Torres L, Barbosa SC, Vaz L, Paiva NC, Carneiro CM, Vieira LQ, Faria AMC, Maioli TU. Obesity impairs resistance to Leishmania major infection in C57BL/6 mice. PLoS Negl Trop Dis 2020; 14:e0006596. [PMID: 31923234 PMCID: PMC6953764 DOI: 10.1371/journal.pntd.0006596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 10/28/2019] [Indexed: 01/19/2023] Open
Abstract
An association between increased susceptibility to infectious diseases and obesity has been described as a result of impaired immunity in obese individuals. It is not clear whether a similar linkage can be drawn between obesity and parasitic diseases. To evaluate the effect of obesity in the immune response to cutaneous Leishmania major infection, we studied the ability of C57BL/6 mice fed a hypercaloric diet (HSB) to control leishmaniasis. Mice with diet-induced obesity presented thicker lesions with higher parasite burden and a more intense inflammatory infiltrate in the infected ear after infection with L. major. There was no difference between control and obese mice in IFN-gamma or IL-4 production by auricular draining lymph node cells, but obese mice produced higher levels of IgG1 and IL-17. Peritoneal macrophages from obese mice were less efficient to kill L. major when infected in vitro than macrophages from control mice. In vitro stimulation of macrophages with IL-17 decreased their capacity to kill the parasite. Moreover, macrophages from obese mice presented higher arginase activity. To confirm the role of IL-17 in the context of obesity and infection, we studied lesion development in obese IL-17R-/- mice infected with L. major and found no difference in skin lesions and the leukocyte accumulation in the draining lymph node is redcuced in knockout mice compared between obese and lean animals. Our results indicate that diet-induced obesity impairs resistance to L. major in C57BL/6 mice and that IL-17 is involved in lesion development. Obesity is a serious and increasing public health problem, and also induces a spectrum of metabolic disorders. Some diseases are known to be more severe in the presence of obesity. However, the interactions of obesity with the immune response to infectious agents have not been fully explored. In this study, we investigated the response of obese mice to infection with Leishmania major. C57BL/6 mice were fed a hypercaloric diet (HSB) and infected afterward with L. major. In obese mice, lesions were ticker and more ulcerative, and cells from draining lymph nodes produced more IL-17 when compared with cells from lean mice fed a control diet. Macrophages from obese and lean mice were infected in vitro and stimulated with IL-17 to test the role of this cytokine in effect produced by obesity. Macrophages from obese mice were more infected by L. major than the macrophages from control mice and the number of parasites was increased by treatment with IL-17. IL-17R deficient mice treated with hypercaloric diet showed no difference in lesion size when compared to mice fed control diet. Our findings suggest that diet-induced obesity decrease the resistance to L. major infection of C57BL/6 mice and the IL-17 cytokine may be involved in the lesion formation.
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Affiliation(s)
- Vinicius Dantas Martins
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Franciele Carolina Silva
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Felipe Caixeta
- Programa de Pós-Graduação Interunidades de Bioinformática, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Matheus Batista Carneiro
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Snyder Institute for Chronic Diseases, Departments of Microbiology, Immunology and Infectious Disease, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Graziele Ribeiro Goes
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lícia Torres
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Sara Cândida Barbosa
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Leonardo Vaz
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Nivea Carolina Paiva
- Núcleo de Pesquisa em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Cláudia Martins Carneiro
- Núcleo de Pesquisa em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Leda Quercia Vieira
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Maria Caetano Faria
- Programa de Pós-Graduação em Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tatiani Uceli Maioli
- Departamento de Nutrição, Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- * E-mail:
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Furtado LFV, Medeiros CDS, Zuccherato LW, Alves WP, de Oliveira VNGM, da Silva VJ, Miranda GS, Fujiwara RT, Rabelo ÉML. First identification of the benzimidazole resistance-associated F200Y SNP in the beta-tubulin gene in Ascaris lumbricoides. PLoS One 2019; 14:e0224108. [PMID: 31622428 PMCID: PMC6797262 DOI: 10.1371/journal.pone.0224108] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 10/04/2019] [Indexed: 01/07/2023] Open
Abstract
The main control strategy for Ascaris lumbricoides is mass drug administration (especially with benzimidazoles), which can select strains of parasites resistant to treatment. Mutations in the beta-tubulin isotype-1 gene at codons 167, 198 and 200 have been linked to benzimidazole resistance in several nematodes. The mutation in codon 200 is the most frequent in different species of parasites, as previously observed in Necator americanus and Trichuris trichiura; however, this mutation has never been found in populations of A. lumbricoides. This study aimed to screen for single nucleotide polymorphisms (SNPs) in the beta-tubulin isotype-1 gene at codon 200 in A. lumbricoides. We developed a technique based on an amplification refractory mutation system (ARMS-PCR) for the analysis of 854 single A. lumbricoides eggs collected from 68 human stool samples from seven Brazilian states. We detected the mutation in codon 200 at a frequency of 0.5% (4/854). This is the first report of this mutation in A. lumbricoides. Although the observed frequency is low, its presence indicates that these parasite populations have the potential to develop high levels of resistance in the future. The methodology proposed here provides a powerful tool to screen for the emergence of anthelmintic resistance mutations in parasitic nematode populations.
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Affiliation(s)
| | - Celi da Silva Medeiros
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luciana Werneck Zuccherato
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - William Pereira Alves
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Vivian Jordania da Silva
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Guilherme Silva Miranda
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ricardo Toshio Fujiwara
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Élida Mara Leite Rabelo
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Freitas KM, Silva ACAE, Veloso ES, Ferreira Ê, Barcelos LS, Caliari MV, Salas CE, Lopes MTP. P1G10, the Proteolytic Fraction from Vasconcellea cundinamarcensis, Stimulates Tissue Repair after Acute Exposure to Ultraviolet B Radiation. Int J Mol Sci 2019; 20:E4373. [PMID: 31489890 PMCID: PMC6770601 DOI: 10.3390/ijms20184373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 08/16/2019] [Accepted: 08/28/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND P1G10 is a cysteine proteolytic fraction from Vasconcellea cundinamarcensis latex, obtained by chromatographic separation on Sephadex-G10 and ultrafiltration. This fraction enhances healing in different models of skin lesions, and displays a protective/healing effect against gastric ulcers, where it was suggested an antioxidant role. METHODS We evaluated here the effect of topical treatment with P1G10, in mice lesions induced by UVB. RESULTS After single exposure to 2.4 J cm-2 UVB, P1G10 reduced erythema, increased cellularity of hypodermis, enhanced MPO activity and IL1β, and inhibited COX2 levels. These results point to an anti-inflammatory effect by P1G10. This fraction displayed antioxidant activity by reversing the depletion of glutathione (GSH), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) and reducing the catalase activity increased by UVB. These changes may be related to a reduction in MDA observed in groups treated with P1G10. P1G10 also inhibited MMP-9, caspase-3 and pkat while increasing p53 levels.
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Affiliation(s)
- Kátia M Freitas
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
| | - Ana C Araújo E Silva
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
- Faculdade de Medicina do Mucuri, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Rua do Cruzeiro, nº 01, Bairro Jardim São Paulo, Teófilo Otoni 39803-371, MG, Brazil.
| | - Emerson S Veloso
- Departamento de Patologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
| | - Ênio Ferreira
- Departamento de Patologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
| | - Lucíola S Barcelos
- Departamento Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
| | - Marcelo V Caliari
- Departamento de Patologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
| | - Carlos E Salas
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
| | - Miriam T P Lopes
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil.
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Reis CMR, Matta-Machado ATG, Amaral JHL, Mambrini JVDM, Werneck MAF, de Abreu MHNG. Understanding oral health care team performance in primary care: A mixed-method study. PLoS One 2019; 14:e0217738. [PMID: 31145771 PMCID: PMC6542530 DOI: 10.1371/journal.pone.0217738] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 05/19/2019] [Indexed: 12/02/2022] Open
Abstract
Objective This study aims to describe the primary care services carried out by Oral Health Teams (OHTs) in Brazil, and to understand the nuances that lead to different levels of OHT performance. Material & methods A mixed-methods study with a sequential explanatory design was developed. In the quantitative phase, secondary data from a national survey (PMAQ-AB) was used to describe the work of 12,403 OHTs. Item response theory (IRT) was applied, to evaluate the psychometric qualities of 20 oral health questions from PMAQ-AB and to identify the performance of OHT. The quantitative results guided the selection of the qualitative sample. An extreme case sampling strategy was used (opposite results). OHTs were selected from Belo Horizonte metropolitan region in Brazil using scores measured by IRT. Data were collected through semi-structured interviews. Data analysis was conducted using deductive and inductive thematic analysis. Results Quantitative results showed that there are OHT with high and low performance in Brazil. The IRT analysis showed that items related to prostheses and oral cancer tend to discriminate high-performance OHTs from other OHTs. Qualitative results deepened the understanding of accessing oral health services and found several access barriers, such as the insufficient number of OHTs for the population, and a very long waiting time for dental consultations other than urgency. The qualitative results confirmed that high-performance OHTs tend to emphasize oral cancer surveillance and deliver prostheses in PHC services. Conclusion Despite the expansion of oral health in PHC in Brazil in recent years, OHTs still face many challenges such as: access barriers; failures in prevention, early diagnosis and follow-up of oral cancer cases; and insufficient rehabilitation with prostheses.
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Affiliation(s)
| | | | - João Henrique Lara Amaral
- Department of Community and Preventive Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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da Fonseca MP, Borges ALDCC, Carvalho PHDA, e Silva RR, Gonçãlves LC, Borges I, Lage HF, Ferreira AL, Saliba EOS, Jayme DG, da Glória JR, Graça DS, Meneses RM, de Carvalho AÚ, Facury Filho EJ, Silva AA. Energy partitioning in cattle fed diets based on tropical forage with the inclusion of antibiotic additives. PLoS One 2019; 14:e0211565. [PMID: 31009472 PMCID: PMC6476472 DOI: 10.1371/journal.pone.0211565] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 01/16/2019] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to describe energy partitioning in dairy crossbreed bulls fed tropical forage-based diets supplemented with different additives. Twenty F1 crossbred bulls (Holstein x Gyr) with initial and final live weight (LW) averages of 190 ± 17 and 275 ± 20 kg were fed sorghum (Sorghum bicolour) and Tanzania grass (Panicum maximum cv. Tanzania) silage (70:30 DM basis) with supplemented concentrate at a forage to concentrate ratio of 50:50. The bulls were allocated to four treatment: control groups (without additives), monensin [22 mg/kg monensin dry matter (DM)] (M), virginiamycin (30 mg/kg virginiamycin DM) (V), and combination (22 mg/kg DM of monensin and 30 mg/kg DM of virginiamycin) (MV), in a completely randomised design. The intake of gross energy (GE, MJ/d), digestible energy (DE, MJ/d), metabolizable energy (ME, MJ/d), as well as energy losses in the form of faeces, urine, methane, heat production (HE), and retained energy (RE) were measured. Faecal output was measured in apparent digestibility trial. Right after the apparent digestibility trial, urine samples were collected in order to estimate the daily urinary production of the animals. Heat and methane production were measured in an open circuit respirometry chamber. The intake of GE, DE, and ME of the animals receiving monensin and virginiamycin alone or in combination (MV) showed no differences (P>0.05) from the control treatment. However, the MV treatment reduced (P<0.05) the methane production (5.44 MJ/d) compared to the control group (7.33 MJ/d), expressed in MJ per day, but not when expressed related to gross energy intake (GEI) (CH4, % GEI) (P = 0.34). Virginiamycin and monensin alone or in combination did not change (P>0.05) the utilization efficiency of ME for weight gain, RE and net gain energy. This study showed that for cattle fed tropical forages, the combination of virginiamycin and monensin as feed additives affected their energy metabolism by a reduction in the energy lost as methane.
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Affiliation(s)
- Marcelina Pereira da Fonseca
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Ana Luiza da Costa Cruz Borges
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | | | - Ricardo Reis e Silva
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Lúcio Carlos Gonçãlves
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Iran Borges
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Helena Ferreira Lage
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Alexandre Lima Ferreira
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Eloísa Oliveira Simões Saliba
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Diogo Gonzaga Jayme
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Joana Ribeiro da Glória
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Décio Souza Graça
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Rodrigo Melo Meneses
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Antônio Último de Carvalho
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Elias Jorge Facury Filho
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
| | - Arthur Alves Silva
- Department of Animal Sciences, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Pampulha
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Cardoso MS, Bento GA, de Almeida LV, de Castro JC, Reis-Cunha JL, Barbosa VDA, de Souza CF, Brazil RP, Valdivia HO, Bartholomeu DC. Detection of multiple circulating Leishmania species in Lutzomyia longipalpis in the city of Governador Valadares, southeastern Brazil. PLoS One 2019; 14:e0211831. [PMID: 30721272 PMCID: PMC6363391 DOI: 10.1371/journal.pone.0211831] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/21/2019] [Indexed: 11/21/2022] Open
Abstract
Leishmaniasis encompasses a group of diverse clinical diseases caused by protozoan parasites of the Leishmania genus. This disease is a major public health problem in the New World affecting people exposed in endemic regions. The city of Governador Valadares (Minas Gerais/Brazil) is a re-emerging area for visceral leishmaniasis, with 191 human cases reported from 2008 to 2017 and a lethality rate of 14.7%. The transmission of the parasite occurs intensely in this region with up to 22% of domestic dogs with positive serology for the visceral form. Lu. longipalpis is one of the most abundant sand fly species in this area. Despite this scenario, so far there is no information regarding the circulating Leishmania species in the insect vector Lutzomyia longipalpis in this focus. We collected 616 female Lutzomyia longipalpis sand flies between January and September 2015 in the Vila Parque Ibituruna neighborhood (Governador Valadares/MG), which is located on a transitional area between the sylvatic and urban environments with residences built near a preserved area. After DNA extraction of individual sand flies, the natural Leishmania infections in Lu. longipalpis were detected by conventional PCR, using primers derived from kDNA sequences, specific for L. (Leishmania) or L. (Viannia) subgenus. The sensitivity of these PCR reactions was 0.1 pg of DNA for each Leishmania subgenus and the total infection rate of 16.2% (100 positive specimens). Species-specific PCR detected the presence of multiple Leishmania species in infected Lu. longipalpis specimens in Governador Valadares, including L. amazonensis (n = 3), L. infantum (n = 28), L. (Viannia) spp. (n = 20), coinfections with L. infantum and L. (Viannia) spp. (n = 5), and L. (Leishmania) spp (n = 44). Our results demonstrate that multiple Leishmania species circulate in Lu. longipalpis in Governador Valadares and reveal a potential increasing risk of transmission of the different circulating parasite species. This information reinforces the need for epidemiological and entomological surveillance in this endemic focus, and the development of effective control strategies against leishmaniasis.
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Affiliation(s)
- Mariana Santos Cardoso
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gabrielle Ariadine Bento
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Laila Viana de Almeida
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Joseane Camilla de Castro
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - João Luís Reis-Cunha
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | | | | | - Daniella Castanheira Bartholomeu
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
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Viana MVC, Sahm A, Góes Neto A, Figueiredo HCP, Wattam AR, Azevedo V. Rapidly evolving changes and gene loss associated with host switching in Corynebacterium pseudotuberculosis. PLoS One 2018; 13:e0207304. [PMID: 30419061 PMCID: PMC6231662 DOI: 10.1371/journal.pone.0207304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 10/28/2018] [Indexed: 02/01/2023] Open
Abstract
Phylogenomics and genome scale positive selection analyses were performed on 29 Corynebacterium pseudotuberculosis genomes that were isolated from different hosts, including representatives of the Ovis and Equi biovars. A total of 27 genes were identified as undergoing adaptive changes. An analysis of the clades within this species and these biovars, the genes specific to each branch, and the genes responding to selective pressure show clear differences, indicating that adaptation and specialization is occurring in different clades. These changes are often correlated with the isolation host but could indicate responses to some undetermined factor in the respective niches. The fact that some of these more-rapidly evolving genes have homology to known virulence factors, antimicrobial resistance genes and drug targets shows that this type of analysis could be used to identify novel targets, and that these could be used as a way to control this pathogen.
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Affiliation(s)
| | - Arne Sahm
- Leibniz Institute on Aging, Fritz Lipmann Institute, Jena, Germany
| | - Aristóteles Góes Neto
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Henrique Cesar Pereira Figueiredo
- AQUACEN, National Reference Laboratory for Aquatic Animal Diseases, Ministry of Fisheries and Aquaculture, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Alice Rebecca Wattam
- Biocomplexity Institute of Virginia Tech, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Vasco Azevedo
- Department of General Biology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Aguirre LA, Portes LL, Letellier C. Structural, dynamical and symbolic observability: From dynamical systems to networks. PLoS One 2018; 13:e0206180. [PMID: 30379892 PMCID: PMC6209294 DOI: 10.1371/journal.pone.0206180] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/07/2018] [Indexed: 12/16/2022] Open
Abstract
Classical definitions of observability classify a system as either being observable or not. Observability has been recognized as an important feature to study complex networks, and as for dynamical systems the focus has been on determining conditions for a network to be observable. About twenty years ago continuous measures of observability for nonlinear dynamical systems started to be used. In this paper various aspects of observability that are established for dynamical systems will be investigated in the context of networks. In particular it will be discussed in which ways simple networks can be ranked in terms of observability using continuous measures of such a property. Also it is pointed out that the analysis of the network topology is typically not sufficient for observability purposes, since both the dynamics and the coupling of such nodes play a vital role. Some of the main ideas are illustrated by means of numerical simulations.
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Affiliation(s)
- Luis A. Aguirre
- Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leonardo L. Portes
- Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- School of Mathematics and Statistics, University of Western Australia, Perth, Western Australia, Australia
| | - Christophe Letellier
- Normandie Université — CORIA, Campus Universitaire du Madrillet, Madrillet, France
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Furtado LFV, Magalhães JGS, Rabelo ÉML. Standardization and application of a modified RFLP-PCR methodology for analysis of polymorphisms linked to treatment resistance in Ancylostoma braziliense. Parasit Vectors 2018; 11:540. [PMID: 30301454 PMCID: PMC6178248 DOI: 10.1186/s13071-018-3125-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 09/24/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Single nucleotide polymorphisms (SNPs) in codons 167, 198 and 200 of the beta-tubulin isotype 1 gene are associated with benzimidazoles resistance in many helminths. Codon 167 mutation has never been described in hookworms; however, polymorphisms in codons 198 and 200 have been described for Ancylostoma caninum and Necator americanus. These mutations have never been investigated in Ancylostoma braziliense; therefore, it is not known if they are present in this species and whether they are correlated with treatment resistance. The RFLP-PCR technique has been used to analyze these polymorphisms in some nematodes, but depending on the species, these alterations do not create or eliminate any restriction enzyme cleavage site, making it impossible to use this technique. Here, we describe the standardization and application of a modified RFLP-PCR technique for detecting polymorphisms in individual A. braziliense worms recovered from naturally infected dogs in two Brazilian states. RESULTS The molecular techniques used were sensitive, specific, and easy to apply. To our knowledge, we report for the first time the presence of a polymorphism at codon 198 of the beta-tubulin gene of A. braziliense (1/81; 95% CI: 0-3.69%). CONCLUSIONS It is not known whether the presence of the mutation in codon 198 of the beta-tubulin gene of A. braziliense has importance for this parasite. However, based on studies of other helminths, it is possible that this polymorphism is directly related to the resistance to benzimidazoles. This may be a major concern, since this nematode has considerable relevance as a parasite of canids and felids and as one of the agents of cutaneous larva migrans in humans. Standardized methodologies will be useful for screening for polymorphisms in the beta-tubulin gene of canine hookworms in a broader population. The method could also be adapted for the analysis of other SNPs in other nematode species.
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Affiliation(s)
- Luis Fernando Viana Furtado
- Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais CEP 31270-901 Brazil
| | - João Guilherme Scarpelli Magalhães
- Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais CEP 31270-901 Brazil
| | - Élida Mara Leite Rabelo
- Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais CEP 31270-901 Brazil
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Caporali JFDM, Labanca L, Florentino KR, Souza BO, Utsch Gonçalves D. Intrarater and interrater agreement and reliability of vestibular evoked myogenic potential triggered by galvanic vestibular stimulation (galvanic-VEMP) for HTLV-1 associated myelopathy testing. PLoS One 2018; 13:e0204449. [PMID: 30261002 PMCID: PMC6160040 DOI: 10.1371/journal.pone.0204449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 09/07/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The vestibular evoked myogenic potential triggered by galvanic vestibular stimulation (galvanic-VEMP) has been used to assess the function of the vestibulospinal motor tract and is a candidate biomarker to predict and monitor the human T-cell lymphotropic virus type 1 (HTLV-1) associated myelopathy (HAM). This study determined the agreement and reliability of this exam. METHODS Galvanic-VEMP was performed in 96 participants, of which 24 patients presented HAM, 27 HTLV-1-asymptomatic carriers, and 45 HTLV-1-negative asymptomatic controls. Galvanic vestibular stimulation was achieved by passing a binaural and bipolar current at a 2 milliamperes (mA) intensity for 400 milliseconds (ms) between the mastoid processes. Galvanic-VEMP electromyographic wave responses of short latency (SL) and medium latency (ML) were recorded from the gastrocnemius muscle. Intrarater (test-retest) and interrater (two independent examiners) agreement and reliability were assessed by standard error of measurement (SEM), coefficient of repeatability (CR), intraclass correlation coefficient (ICC), and Kappa coefficient. RESULTS In the total sample (n = 96), SL and ML medians were 56 ms (IQR 52-66) and 120 ms (IQR 107-130), respectively. The intrarater repeatability measures for SL and ML were, respectively: SEM of 6 and 8 ms; CR of 16 and 22 ms; ICC of 0.80 (p<0.001) and 0.91 (p<0.001); and a Kappa coefficient of 0.53 (p<0.001) and 0.82 (p<0.001). The interrater reproducibility measures for SL and ML were, respectively: SEM of 3 and 10 ms; CR of 8 and 27 ms; ICC of 0.95 (p<0.001) and 0.86 (p<0.001); and a Kappa coefficient of 0.77 (p<0.001) and 0.88 (p<0.001). CONCLUSION Galvanic-VEMP is a reliable and reproducible method to define the integrity of the vestibulospinal tract. Longitudinal studies will clarify its validity in the clinical context, aimed at achieving an early diagnosis and the monitoring of HAM.
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Affiliation(s)
- Júlia Fonseca de Morais Caporali
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail: (JFMC); (DUG)
| | - Ludimila Labanca
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Kyonis Rodrigues Florentino
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Bárbara Oliveira Souza
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Denise Utsch Gonçalves
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail: (JFMC); (DUG)
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Labanca L, de Morais Caporali JF, da Silva Carvalho SA, Lambertucci JR, Carneiro Proietti ABDF, Romanelli LCF, Avan P, Giraudet F, Souza BO, Florentino KR, Utsch Gonçalves D. Vestibular-evoked myogenic potential triggered by galvanic vestibular stimulation may reveal subclinical alterations in human T-cell lymphotropic virus type 1-associated myelopathy. PLoS One 2018; 13:e0200536. [PMID: 30001400 PMCID: PMC6042765 DOI: 10.1371/journal.pone.0200536] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 06/28/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Vestibular-evoked myogenic potential triggered by galvanic vestibular stimulation (galvanic-VEMP) evaluates the motor spinal cord and identifies subclinical myelopathies. We used galvanic-VEMP to compare spinal cord function in individuals infected with human T-cell lymphotropic virus type 1 (HTLV-1) from asymptomatic status to HTLV-1-associated myelopathy (HAM). METHODOLOGY/PRINCIPAL FINDINGS This cross-sectional study with 122 individuals included 26 HTLV-1-asymptomatic carriers, 26 individuals with possible HAM, 25 individuals with HAM, and 45 HTLV-1-seronegative individuals (controls). The groups were similar regarding gender, age, and height. Galvanic stimuli (duration: 400 ms; intensity: 2 mA) were applied bilaterally to the mastoid processes and VEMP was recorded from the gastrocnemius muscle. The electromyographic parameters investigated were the latency and amplitude of the short-latency (SL) and medium-latency (ML) responses. While SL and ML amplitudes were similar between groups, SL and ML latencies were delayed in the HTLV-1 groups compared to the control group (p<0.001). Using neurological examination as the gold standard, ROC curve showed an area under the curve of 0.83 (p<0.001) for SL and 0.86 (p<0.001) for ML to detect spinal cord injury. Sensibility and specificity were, respectively, 76% and 86% for SL and 79% and 85% for ML. Galvanic-VEMP disclosed alterations that were progressive in HTLV-1-neurological disease, ranging from SL delayed latency in HTLV-1-asymptomatic carriers, SL and ML delayed latency in possible HAM group, to absence of VEMP response in HAM group. CONCLUSIONS/SIGNIFICANCE The worse the galvanic-VEMP response, the more severe the myelopathy. Galvanic-VEMP alteration followed a pattern of alteration and may be a prognostic marker of progression from HTLV-1-asymptomatic carrier to HAM.
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Affiliation(s)
- Ludimila Labanca
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Júlia Fonseca de Morais Caporali
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sirley Alves da Silva Carvalho
- Programa de Pós-Graduação em Ciências Fonoaudiológicas, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - José Roberto Lambertucci
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Paul Avan
- Laboratoire de Biophysique Neurosensorielle, Faculté de Médecine, Université Clermont Auvergne, Clermont Ferrand, Auvergne, France
| | - Fabrice Giraudet
- Laboratoire de Biophysique Neurosensorielle, Faculté de Médecine, Université Clermont Auvergne, Clermont Ferrand, Auvergne, France
| | - Bárbara Oliveira Souza
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Kyonis Rodrigues Florentino
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Denise Utsch Gonçalves
- Programa de Pós-Graduação em Infectologia e Medicina Tropical, Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
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de Rezende IM, Sacchetto L, Munhoz de Mello É, Alves PA, Iani FCDM, Adelino TÉR, Duarte MM, Cury ALF, Bernardes AFL, Santos TA, Pereira LS, Dutra MRT, Ramalho DB, de Thoisy B, Kroon EG, Trindade GDS, Drumond BP. Persistence of Yellow fever virus outside the Amazon Basin, causing epidemics in Southeast Brazil, from 2016 to 2018. PLoS Negl Trop Dis 2018; 12:e0006538. [PMID: 29864115 PMCID: PMC6002110 DOI: 10.1371/journal.pntd.0006538] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 06/14/2018] [Accepted: 05/17/2018] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Yellow fever (YF) is endemic in the Brazilian Amazon Basin, and sporadic outbreaks take place outside the endemic area in Brazil. Since 2016, YF epidemics have been occurring in Southeast Brazil, with more than 1,900 human cases and more than 1,600 epizooties of non-human primates (NHPs) reported until April 2018. Previous studies have demonstrated that Yellow fever virus (YFV) causing outbreaks in 2017 formed a monophyletic group. METHODOLOGY/PRINCIPAL FINDINGS Aiming to decipher the origin of the YFV responsible for the recent epidemics, we obtained nucleotide sequences of YFV detected in humans (n = 6) and NHPs (n = 10) from Minas Gerais state during 2017-2018. Next, we performed evolutionary analyses and discussed the results in the light of epidemiological records (official numbers of YFV cases at each Brazilian Federative unit, reported by the Brazilian Ministry of Health). Nucleotide sequences of YFV from Southeast Brazil from 2016 to 2018 were highly conserved and formed a monophyletic lineage (BR-YFV_2016/18) within the genotype South America I. Different clusters were observed within lineage BR-YFV_2016/18, one containing the majority of isolates (from humans and NHPs), indicating the sylvatic transmission of YFV. We also detected a cluster characterized by two synapomorphies (amino acid substitutions) that contained YFV only associated with NHP what should be further investigated. The topology of lineage BR-YFV_2016/18 was congruent with epidemiological and temporal patterns of the ongoing epidemic. YFV isolates detected in 2016, in São Paulo state were located in the most basal position of the lineage, followed by the isolates from Minas Gerais and Espírito Santo obtained in 2017 and 2018. The most recent common ancestor of the lineage BR-YFV_2016/18 dated to 2015 (95% credible intervals = 2014-2016), in a period that was coincident with the reemergence of YFV in the Midwest region of Brazil. CONCLUSIONS The results demonstrated a single introduction of YFV in the Southeast region and the silent viral circulation before the onset of the outbreaks in 2016. Evolutionary analyses combined with epidemiological records supported the idea that BR-YFV_2016/18 was probably introduced from the Midwest into the Southeast region, possibly in São Paulo state. The persistence of YFV in the Southeast region, causing epidemics from 2016 to 2018, suggests that this region presents suitable ecological and climatic conditions for YFV maintenance during the epidemic and interepidemic seasons. This fact poses risks for the establishing of YF enzootic cycles and epidemics, outside the Amazon Basin in Brazil. YF surveillance and studies of viral dynamics deserve particular attention, especially in Midwest, Southeast and neighbor regions which are the main areas historically associated with YF outbreaks outside the Amazon Basin. YFV persistence in Southeast Brazil should be carefully considered in the context of public health, especially for public health decision-makers and researchers.
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Affiliation(s)
- Izabela Maurício de Rezende
- Laboratório de Vírus, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Lívia Sacchetto
- Laboratório de Vírus, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Érica Munhoz de Mello
- Centro de Controle de Zoonoses da Prefeitura de Belo Horizonte, Belo Horizonte, Minas Gerais, Brazil
| | - Pedro Augusto Alves
- Laboratório de Imunologia de Doenças Virais, Instituto René Rachou- Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Felipe Campos de Melo Iani
- Serviço de Virologia e Riquetsioses, Fundação Ezequiel Dias- LACEN/MG, Belo Horizonte, Minas Gerais, Brazil
| | | | - Myrian Morato Duarte
- Serviço de Virologia e Riquetsioses, Fundação Ezequiel Dias- LACEN/MG, Belo Horizonte, Minas Gerais, Brazil
| | - Ana Luísa Furtado Cury
- Serviço de Virologia e Riquetsioses, Fundação Ezequiel Dias- LACEN/MG, Belo Horizonte, Minas Gerais, Brazil
| | | | - Tayrine Araújo Santos
- Hospital Eduardo de Menezes, Fundação Hospitalar do Estado de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leonardo Soares Pereira
- Hospital Eduardo de Menezes, Fundação Hospitalar do Estado de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Maria Rita Teixeira Dutra
- Hospital Eduardo de Menezes, Fundação Hospitalar do Estado de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Dario Brock Ramalho
- Hospital Eduardo de Menezes, Fundação Hospitalar do Estado de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Benoit de Thoisy
- Laboratoire des Interaction Virus-Hôtes, Institut Pasteur, Cayenne, French Guiana
| | - Erna Geessien Kroon
- Laboratório de Vírus, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Giliane de Souza Trindade
- Laboratório de Vírus, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Betânia Paiva Drumond
- Laboratório de Vírus, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Mansur AAP, Mansur HS, Caires AJ, Mansur RL, Oliveira LC. Composition-Tunable Optical Properties of Zn x Cd (1 - x)S Quantum Dot-Carboxymethylcellulose Conjugates: Towards One-Pot Green Synthesis of Multifunctional Nanoplatforms for Biomedical and Environmental Applications. Nanoscale Res Lett 2017; 12:443. [PMID: 28683540 PMCID: PMC5498436 DOI: 10.1186/s11671-017-2212-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 06/25/2017] [Indexed: 05/16/2023]
Abstract
Quantum dots (QDs) are colloidal semiconductor nanocrystals with unique properties that can be engineered by controlling the nanoparticle size and chemical composition by doping and alloying strategies. However, due to their potential toxicity, augmenting their biocompatibility is yet a challenge for expanding to several biomedical and environmentally friendly applications. Thus, the main goal of this study was to develop composition-tunable and biocompatible Zn x Cd1 - x S QDs using carboxymethylcellulose polysaccharide as direct capping ligand via green colloidal aqueous route at neutral pH and at room temperature for potential biomedical and environmental applications. The ternary alloyed QDs were extensively characterized using UV-vis spectroscopy, photoluminescence spectroscopy (PL), transmission electron microscopy (TEM), X-ray diffraction (XRD), electron energy loss spectroscopy (EELS), and X-ray photoelectrons spectroscopy (XPS). The results indicated that Zn x Cd(1 - x)S QDs were surface stabilized by carboxymethylcellulose biopolymer with spherical morphology for all composition of alloys and narrow sizes distributions ranging from 4 to 5 nm. The XRD results indicated that monophasic ternary alloyed Zn x Cd1 - x S nanocrystals were produced with homogenous composition of the core as evidenced by EELS and XPS analyses. In addition, the absorption and emission optical properties of Zn x Cd1 - x S QDs were red shifted with increasing the amount of Cd2+ in the alloyed nanocrystals, which have also increased the quantum yield compared to pure CdS and ZnS nanoparticles. These properties of alloyed nanomaterials were interpreted based on empirical model of Vegard's law and chemical bond model (CBM). As a proof of concept, these alloyed-QD conjugates were tested for biomedical and environmental applications. The results demonstrated that they were non-toxic and effective fluorophores for bioimaging live HEK293T cells (human embryonic kidney cells) using confocal laser scanning fluorescence microscopy. Moreover, these conjugates presented photocatalytic activity for photodegradation of methylene blue used as model organic industrial pollutant in water. Hence, composition-tunable optical properties of ternary Zn x Cd1 - x S (x = 0-1) fluorescent alloyed QDs was achieved using a facile eco-friendly aqueous processing route, which can offer promising alternatives for developing innovative nanomaterials for applications in nanomedicine and environmental science and technology.
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Affiliation(s)
- Alexandra A P Mansur
- Center of Nanoscience, Nanotechnology and Innovation - CeNano(2)I, Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, Brazil
| | - Herman S Mansur
- Center of Nanoscience, Nanotechnology and Innovation - CeNano(2)I, Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, Brazil.
- Federal University of Minas Gerais, Av. Antônio Carlos, 6627 - Escola de Engenharia, Bloco 2 - Sala 2233, Belo Horizonte, MG, 31.270-901, Brazil.
| | - Anderson J Caires
- Center of Nanoscience, Nanotechnology and Innovation - CeNano(2)I, Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, Brazil
| | - Rafael L Mansur
- Center of Nanoscience, Nanotechnology and Innovation - CeNano(2)I, Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, Brazil
| | - Luiz C Oliveira
- Department of Chemistry, Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, Brazil
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Abstract
OBJECTIVES The aim of this systematic review of randomised controlled trials (RCTs), and quasi-experimental and retrospective studies is to investigate the effects of pulmonary rehabilitation (PR) in patients with advanced chronic disease on the waiting list for lung transplantation. SETTING PR performed for inpatient or outpatient lung transplant candidates. INTERVENTION PR programme including aerobic exercise training and/or resistance exercise training. PRIMARY AND SECONDARY OUTCOMES Quality of life and exercise capacity (primary outcomes). Survival rate after transplant surgery; pulmonary function; respiratory muscle strength; psychological aspects; upper and lower extremity muscle strength and adverse effects (secondary outcomes). Two review authors independently selected the studies, assessed study quality and extracted data. Studies in any language were included. RESULTS This was a systematic review and studies were searched on the Cochrane Library, MEDLINE, EMBASE, CINAHL and PEDro. Experimental and retrospective studies evaluating the effects of PR in candidates for lung transplantation (>18 years old) with any lung diseases were included. 2 RCTs, and two quasi-experimental and two retrospectives studies, involving 1305 participants were included in the review. 5 studies included an enhancement reported in quality of life using the Short Form 36 questionnaire and showed improvements in some domains. All studies included exercise capacity evaluated through 6 min walk test and in five of them, there were improvements in this outcome after PR. Owing to the different characteristics of the studies, it was not possible to perform a meta-analysis. CONCLUSIONS Studies included in this review showed that PR is an effective treatment option for patients on the waiting list for lung transplantation and can improve quality of life and exercise capacity in those patients. Although individual studies reported positive effects of PR, this review shows that there is a need for more studies of a high methodological quality addressing PR effects in lung transplant candidates. TRIAL REGISTRATION NUMBER PROSPERO CDR42015025110.
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Affiliation(s)
- Mariana Hoffman
- Rehabilitation Sciences Program, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Gabriela Chaves
- Rehabilitation Sciences Program, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Costa FV, Mello MAR, Bronstein JL, Guerra TJ, Muylaert RL, Leite AC, Neves FS. Few Ant Species Play a Central Role Linking Different Plant Resources in a Network in Rupestrian Grasslands. PLoS One 2016; 11:e0167161. [PMID: 27911919 PMCID: PMC5135051 DOI: 10.1371/journal.pone.0167161] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 11/09/2016] [Indexed: 11/28/2022] Open
Abstract
Ant-plant associations are an outstanding model to study the entangled ecological interactions that structure communities. However, most studies of plant-animal networks focus on only one type of resource that mediates these interactions (e.g, nectar or fruits), leading to a biased understanding of community structure. New approaches, however, have made possible to study several interaction types simultaneously through multilayer networks models. Here, we use this approach to ask whether the structural patterns described to date for ant-plant networks hold when multiple interactions with plant-derived food rewards are considered. We tested whether networks characterized by different resource types differ in specialization and resource partitioning among ants, and whether the identity of the core ant species is similar among resource types. We monitored ant interactions with extrafloral nectaries, flowers, and fruits, as well as trophobiont hemipterans feeding on plants, for one year, in seven rupestrian grassland (campo rupestre) sites in southeastern Brazil. We found a highly tangled ant-plant network in which plants offering different resource types are connected by a few central ant species. The multilayer network had low modularity and specialization, but ant specialization and niche overlap differed according to the type of resource used. Beyond detecting structural differences across networks, our study demonstrates empirically that the core of most central ant species is similar across them. We suggest that foraging strategies of ant species, such as massive recruitment, may determine specialization and resource partitioning in ant-plant interactions. As this core of ant species is involved in multiple ecosystem functions, it may drive the diversity and evolution of the entire campo rupestre community.
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Affiliation(s)
- Fernanda V. Costa
- Graduate School in Ecology, Conservation, and Wildlife Management, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Marco A. R. Mello
- Graduate School in Ecology, Conservation, and Wildlife Management, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Judith L. Bronstein
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, United States of America
| | - Tadeu J. Guerra
- Department of Botany, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Renata L. Muylaert
- Department of Ecology, São Paulo State University (UNESP), São Paulo, Brazil
| | - Alice C. Leite
- Graduate School in Ecology, Conservation, and Wildlife Management, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Frederico S. Neves
- Graduate School in Ecology, Conservation, and Wildlife Management, Federal University of Minas Gerais, Minas Gerais, Brazil
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Boari de Lima E, Meira W, de Melo-Minardi RC. Isofunctional Protein Subfamily Detection Using Data Integration and Spectral Clustering. PLoS Comput Biol 2016; 12:e1005001. [PMID: 27348631 PMCID: PMC4922564 DOI: 10.1371/journal.pcbi.1005001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 05/22/2016] [Indexed: 01/14/2023] Open
Abstract
As increasingly more genomes are sequenced, the vast majority of proteins may only be annotated computationally, given experimental investigation is extremely costly. This highlights the need for computational methods to determine protein functions quickly and reliably. We believe dividing a protein family into subtypes which share specific functions uncommon to the whole family reduces the function annotation problem's complexity. Hence, this work's purpose is to detect isofunctional subfamilies inside a family of unknown function, while identifying differentiating residues. Similarity between protein pairs according to various properties is interpreted as functional similarity evidence. Data are integrated using genetic programming and provided to a spectral clustering algorithm, which creates clusters of similar proteins. The proposed framework was applied to well-known protein families and to a family of unknown function, then compared to ASMC. Results showed our fully automated technique obtained better clusters than ASMC for two families, besides equivalent results for other two, including one whose clusters were manually defined. Clusters produced by our framework showed great correspondence with the known subfamilies, besides being more contrasting than those produced by ASMC. Additionally, for the families whose specificity determining positions are known, such residues were among those our technique considered most important to differentiate a given group. When run with the crotonase and enolase SFLD superfamilies, the results showed great agreement with this gold-standard. Best results consistently involved multiple data types, thus confirming our hypothesis that similarities according to different knowledge domains may be used as functional similarity evidence. Our main contributions are the proposed strategy for selecting and integrating data types, along with the ability to work with noisy and incomplete data; domain knowledge usage for detecting subfamilies in a family with different specificities, thus reducing the complexity of the experimental function characterization problem; and the identification of residues responsible for specificity.
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Affiliation(s)
- Elisa Boari de Lima
- Department of Biochemistry and Immunology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Wagner Meira
- Department of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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