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1.
Trop Med Int Health ; 29(5): 405-413, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38503276

RESUMO

OBJECTIVE: Inspiratory muscle strength (IMS) appears to be reduced in subjects with chronic Chagas heart disease (CHD), especially in the presence of heart failure (HF). However, only one study about IMS and inspiratory muscle endurance (IME) in those with CHD without heart failure is available. This study aimed to compare IMS and IME in subjects with CHD in the presence and absence of HF. METHODS: This is a cross-sectional study in which 30 CHD adult patients were divided into CHD-CC group (initial phase of CHD, without HF; n = 15) and CHD-HF group (advanced phase of CHD, with HF; n = 15). We assessed IMS by maximum inspiratory pressure (MIP) and IME by incremental (Pthmax) and constant load (TLim) tests. Reduced IMS and IME were considered by predicted MIP values <70% and Pthmax/MIP <75%, respectively. RESULTS: Inspiratory muscle weakness (IMW) was more frequent in CHD-HF than in CHD-CC (46.7% vs. 13.3%; p = 0.05), and both groups had high frequencies of reduced IME (93.3% CHD-CC vs. 100.0% CHD-HF; p = 0.95). Age-adjusted logistic regression analysis using HF as a dependent variable showed that HF was associated with an increased chance of IMW compared with the CHD-CC group (OR = 7.47; p = 0.03; 95% CI 1.20-46.19). CONCLUSION: This study suggests that, in patients with CHD, HF is associated with IMW, and that reduction of IME is already present in the initial phase, similar to the advanced phase with HF.


Assuntos
Cardiomiopatia Chagásica , Músculos Respiratórios , Humanos , Estudos Transversais , Masculino , Feminino , Pessoa de Meia-Idade , Músculos Respiratórios/fisiopatologia , Cardiomiopatia Chagásica/fisiopatologia , Adulto , Doença Crônica , Insuficiência Cardíaca/fisiopatologia , Força Muscular/fisiologia , Inalação/fisiologia , Debilidade Muscular/fisiopatologia , Resistência Física , Idoso
2.
Trop Med Int Health ; 27(7): 630-638, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35644993

RESUMO

OBJECTIVES: The present study aimed to perform a cost-effectiveness analysis of an exercise-based cardiovascular rehabilitation (CR) program in patients with chronic Chagas cardiomyopathy (CCC). METHODS: Cost-effectiveness analysis alongside a randomised clinical trial evaluating the effects of a 6-month exercise-based CR program. The intervention group underwent 3 weekly exercise sessions. The variation of peak oxygen consumption (VO2peak ) was used as a measurement of clinical outcome. Cost information from all healthcare expenses (examinations, healthcare visits, medication and hospitalisation) were obtained from the medical records in Brazilian reais (R$) and transformed into dollars using the purchasing power parity ($PPP). The longitudinal costs variation was evaluated through linear mixed models, represented by ß coefficient, adjusted for the baseline values of the dependent variable. The cost-effectiveness evaluation was determined through an incremental cost-effectiveness ratio using the HEABS package (Stata 15.0). RESULTS: The intervention group presented higher costs with healthcare visits (ß = +3317.3; p < 0.001), hospitalisation (ß = +2810.4; p = 0.02) and total cost (ß = +6407.9; p < 0.001) after 3 months of follow-up. Costs related to healthcare visits (ß = +2455.8; p < 0.001) and total cost (ß = +4711.4; p < 0.001) remained higher in the intervention group after 6 months. The CR program showed an incremental cost-effectiveness ratio (ICER) of $PPP 1874.3 for each increase of 1.0 ml kg-1  min-1 of VO2peak . CONCLUSIONS: The CR program can be considered a cost-effective alternative and should be included as an intervention strategy in the care of patients with CCC.


Assuntos
Reabilitação Cardíaca , Cardiomiopatia Chagásica , Brasil , Análise Custo-Benefício , Terapia por Exercício , Humanos
3.
Microvasc Res ; 134: 104106, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33212111

RESUMO

BACKGROUND: Chagas heart disease (CHD) impairs the systemic microvascular function. We investigated the effects of exercise training on cutaneous microvascular function among patients with CHD. METHODS: Patients from the PEACH study were randomly assigned to a supervised exercise training 3 times/week for 6 months (Trained; n = 10) or a control group (Untrained; n = 8). Both groups underwent evaluation of microvascular function before, and at 3- and 6-months of follow-up. Cutaneous vascular conductance (CVC) was assessed in the skin of the forearm using laser speckle contrast imaging coupled with iontophoresis of acetylcholine (ACh), sodium nitroprusside (SNP) and during post-occlusive reactive hyperemia (PORH). RESULTS: At 3-months of follow-up, no difference was detected between groups in CVC responses to ACh (p = 0.50), SNP (p = 0.26) and HRPO (p = 0.65). However, at 6-months of follow-up, trained vs. untrained patients improved CVC induced by SNP-iontophoresis (0.19 ± 0.10 vs. 0.14 ± 0.15 APU.mmHg-1; p = 0.05) and PORH (0.63 ± 0.15 vs. 0.48 ± 0.18 APU.mmHg-1; p = 0.05). CVC response to ACh-iontophoresis was similar between groups (0.19 ± 0.11 vs. 0.22 ± 0.17 APU.mmHg-1; p = 0.38). CONCLUSION: Exercise training performed during 6 months improved the cutaneous microvascular function of CHD patients. Further studies evaluating the mechanism involved in this response are warranted.


Assuntos
Reabilitação Cardíaca , Cardiomiopatia Chagásica/reabilitação , Terapia por Exercício , Microcirculação , Pele/irrigação sanguínea , Idoso , Brasil , Cardiomiopatia Chagásica/diagnóstico por imagem , Cardiomiopatia Chagásica/parasitologia , Cardiomiopatia Chagásica/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Recuperação de Função Fisiológica , Fluxo Sanguíneo Regional , Fatores de Tempo , Resultado do Tratamento
4.
Trop Med Int Health ; 26(3): 355-365, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33305528

RESUMO

OBJECTIVES: To describe the clinical and sociodemographic characteristics of participants as well as discontinuation and mortality rates in a cardiac rehabilitation programme (CRP) tailored to Chagas disease (CD). METHODS: Participants underwent functional capacity, anthropometry and cardiac function evaluations before beginning a CRP. Univariate and multivariate Cox proportional hazards models were performed to investigate the associations between clinical and sociodemographic characteristics at baseline with discontinuation rates and deaths. RESULTS: Forty-two patients were enrolled in the CRP (61.9% men, mean age of 58.1 ± 11.8 years). During a median follow-up period of 10.8 months, 74% discontinued and 14% died while enrolled in CRP. 34% of the patients who discontinued CRP died during follow-up. White race (HR = 0.09; 95% CI 0.01-1.00), right ventricular systolic dysfunction (HR = 10.54; 95% CI 1.24-89.50) and oxygen pulse (HR = 0.69; 95% CI 0.48-0.99) were independently associated with death while enrolled in CRP. Married status (HR = 0.44; 95% CI 0.21-0.95) was independently associated with discontinuation rates from CRP. VO2 peak (HR = 0.85; 95% CI 0.74-0.98) and CRP discontinuation due to CD-related reasons (HR = 8.33; 95% CI 1.91-36.27) were the variables independently associated with death after discontinuation of CRP. CONCLUSION: In this population, sociodemographic aspects and severity of CD were important determinants of CRP discontinuation and mortality.


OBJECTIFS: Décrire les caractéristiques cliniques et sociodémographiques des participants ainsi que les taux d'abandon et de décès dans un programme de réadaptation cardiaque (PRC) adapté à la maladie de Chagas (MC). MÉTHODES: Les participants ont subi des évaluations de la capacité fonctionnelle, de l'anthropométrie et de la fonction cardiaque avant de commencer un PRC. Des modèles de risques proportionnels de Cox univariés et multivariés ont été appliqués pour étudier les associations entre les caractéristiques cliniques et sociodémographiques au départ avec les taux d'abandon et les décès. RÉSULTATS: 42 patients ont été enrôlés dans le PRC (61,9% d'hommes, âge moyen de 58,1 ± 11,8 ans). Au cours d'une période médiane de suivi de 10,8 mois, 74% ont abandonné et 14% sont décédés durant leur enrôlement au PRC. 34% des patients qui ont arrêté le PRC sont décédés au cours du suivi. La race blanche (HR = 0,09; IC95%: 0,01-1,00), le dysfonctionnement systolique ventriculaire droite (HR = 10,54; IC95%: 1,24-89,50) et le pouls d'oxygène (HR = 0,69; IC95%: 0,48-0,99) étaient indépendamment associés avec le décès lors de l'enrôlement au PRC. Le statut marié (HR = 0,44; IC95%: 0,21-0,95) était indépendamment associé aux taux d'abandon de la CRP. Le pic de VO2 (HR = 0,85; IC95%: 0,74-0,98) et l'arrêt du PRC pour des raisons liées à la MC (HR = 8,33; IC95%: 1,91 à 36,27) étaient les variables indépendamment associées au décès après l'arrêt du PRC. CONCLUSION: Dans cette population, les aspects sociodémographiques et la sévérité de la MC étaient des déterminants importants de l'arrêt du PRC et du décès.


Assuntos
Reabilitação Cardíaca/mortalidade , Doença de Chagas/mortalidade , Pacientes Desistentes do Tratamento/estatística & dados numéricos , Idoso , Brasil/epidemiologia , Doença de Chagas/classificação , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Índice de Gravidade de Doença , Fatores Socioeconômicos , Análise de Sobrevida , Centros de Atenção Terciária
5.
Int J Sports Med ; 42(5): 456-463, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33307554

RESUMO

Inspiratory muscle training represents a recommended clinical practice to improve physical performance of healthy individuals, athletes, and those with chronic diseases. This study aimed to evaluate whether high- and low-intensity inspiratory muscle training interferes with the aerobic capacity of indoor soccer players. Volunteers were equally and randomly divided into CON (control group, no inspiratory muscle training); HIG (high-intensity group, inspiratory muscle training at 80% of maximal inspiratory pressure, 3 sets of 12 repetitions); and LIG (low-intensity group, inspiratory muscle training at 50% of maximal inspiratory pressure, 2 sets of 20 repetitions). Before and after inspiratory muscle training, maximal inspiratory and expiratory pressures, the incremental shuttle run test, and the 3-min step test were evaluated. Both inspiratory muscle training protocols improved maximal inspiratory and expiratory pressures, and indirect maximal oxygen consumption and distance traveled in the shuttle test compared to CON. However, only HIG achieved significant increases of indirect oxygen consumption and frequency of step rise in the 3-min step test (p<0.05). Inspiratory muscle training is an important tool to enhance maximal inspiratory pressure and exercise tolerance with potential benefits on submaximal aerobic capacity. However, high-intensity inspiratory muscle training improved aerobic capacity in amateur indoor soccer players in both submaximal tests.


Assuntos
Limiar Anaeróbio , Exercícios Respiratórios/métodos , Músculos Respiratórios/fisiologia , Futebol/fisiologia , Adolescente , Teste de Esforço , Tolerância ao Exercício , Humanos , Masculino , Pressões Respiratórias Máximas , Distribuição Aleatória , Mecânica Respiratória , Método Simples-Cego
6.
BMC Genomics ; 17: 315, 2016 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-27129708

RESUMO

BACKGROUND: Studies have detected mis-assemblies in genomes of the species Corynebacterium pseudotuberculosis. These new discover have been possible due to the evolution of the Next-Generation Sequencing platforms, which have provided sequencing with accuracy and reduced costs. In addition, the improving of techniques for construction of high accuracy genomic maps, for example, Whole-genome mapping (WGM) (OpGen Inc), have allow high-resolution assembly that can detect large rearrangements. RESULTS: In this work, we present the resequencing of Corynebacterium pseudotuberculosis strain 1002 (Cp1002). Cp1002 was the first strain of this species sequenced in Brazil, and its genome has been used as model for several studies in silico of caseous lymphadenitis disease. The sequencing was performed using the platform Ion PGM and fragment library (200 bp kit). A restriction map was constructed, using the technique of WGM with the enzyme KpnI. After the new assembly process, using WGM as scaffolder, we detected a large inversion with size bigger than one-half of genome. A specific analysis using BLAST and NR database shows that the inversion occurs between two homology RNA ribosomal regions. CONCLUSION: In conclusion, the results showed by WGM could be used to detect mismatches in assemblies, providing genomic maps with high resolution and allow assemblies with more accuracy and completeness. The new assembly of C. pseudotuberculosis was deposited in GenBank under the accession no. CP012837.


Assuntos
Mapeamento Cromossômico/métodos , Corynebacterium pseudotuberculosis/genética , Genoma Bacteriano , Genômica/métodos , Óperon de RNAr/genética , DNA Bacteriano/genética , Biblioteca Gênica , Sequenciamento de Nucleotídeos em Larga Escala , Análise de Sequência de DNA
7.
BMC Genomics ; 15: 14, 2014 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-24405787

RESUMO

BACKGROUND: The completion of whole-genome sequencing for Corynebacterium pseudotuberculosis strain 1002 has contributed to major advances in research aimed at understanding the biology of this microorganism. This bacterium causes significant loss to goat and sheep farmers because it is the causal agent of the infectious disease caseous lymphadenitis, which may lead to outcomes ranging from skin injury to animal death. In the current study, we simulated the conditions experienced by the bacteria during host infection. By sequencing transcripts using the SOLiDTM 3 Plus platform, we identified new targets expected to potentiate the survival and replication of the pathogen in adverse environments. These results may also identify possible candidates useful for the development of vaccines, diagnostic kits or therapies aimed at the reduction of losses in agribusiness. RESULTS: Under the 3 simulated conditions (acid, osmotic and thermal shock stresses), 474 differentially expressed genes exhibiting at least a 2-fold change in expression levels were identified. Important genes to the infection process were induced, such as those involved in virulence, defence against oxidative stress, adhesion and regulation, and many genes encoded hypothetical proteins, indicating that further investigation of the bacterium is necessary. The data will contribute to a better understanding of the biology of C. pseudotuberculosis and to studies investigating strategies to control the disease. CONCLUSIONS: Despite the veterinary importance of C. pseudotuberculosis, the bacterium is poorly characterised; therefore, effective treatments for caseous lymphadenitis have been difficult to establish. Through the use of RNAseq, these results provide a better biological understanding of this bacterium, shed light on the most likely survival mechanisms used by this microorganism in adverse environments and identify candidates that may help reduce or even eradicate the problems caused by this disease.


Assuntos
Corynebacterium pseudotuberculosis/genética , Genes Bacterianos , Estresse Fisiológico , Proteínas de Bactérias/genética , Proteínas de Bactérias/metabolismo , Corynebacterium pseudotuberculosis/metabolismo , Regulação para Baixo , Concentração de Íons de Hidrogênio , Pressão Osmótica , RNA não Traduzido/metabolismo , Análise de Sequência de DNA , Fator sigma/genética , Fator sigma/metabolismo , Temperatura , Regulação para Cima
8.
Vet Res ; 45: 28, 2014 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-24597857

RESUMO

Caseous lymphadenitis (CLA) is a chronic disease that affects sheep and goats worldwide, and its etiological agent is Corynebacterium pseudotuberculosis. Despite the economic losses caused by CLA, there is little information about the molecular mechanisms of bacterial pathogenesis, and current immune prophylaxis against infection has been unable to reduce the incidence of CLA in goats. Recently, 21 different mutant strains of C. pseudotuberculosis were identified by random mutagenesis. In this study, these previously generated mutants were used in mice vaccination trials to develop new immunogens against CLA. Based on this analysis, CZ171053, an iron-acquisition-deficient mutant strain, was selected. After challenge with a virulent strain, 80% of the animals that were immunized with the CZ171053 strain survived. Furthermore, this vaccination elicited both humoral and cellular responses. Intracellular survival of the bacterium was determined using murine J774 cells; in this assay, the CZ171053 had reduced intracellular viability. Because iron acquisition in intracellular bacteria is considered one of their most important virulence factors during infection, these results demonstrate the immunogenic potential of this mutant against CLA.


Assuntos
Vacinas Bacterianas/imunologia , Infecções por Corynebacterium/veterinária , Corynebacterium pseudotuberculosis/imunologia , Corynebacterium pseudotuberculosis/patogenicidade , Linfadenite/veterinária , Animais , Infecções por Corynebacterium/imunologia , Infecções por Corynebacterium/microbiologia , Infecções por Corynebacterium/prevenção & controle , Corynebacterium pseudotuberculosis/genética , Citocinas/sangue , Imunoglobulinas/sangue , Linfadenite/imunologia , Linfadenite/microbiologia , Linfadenite/prevenção & controle , Camundongos , Camundongos Endogâmicos BALB C , Mutação , Virulência
9.
BMC Vet Res ; 10: 965, 2014 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-25527190

RESUMO

BACKGROUND: Caseous lymphadenitis (CLA) is an infectious disease that affects small ruminants and is caused by Corynebacterium pseudotuberculosis. This disease is responsible for high economic losses due to condemnation and trim of infected carcasses, decreased leather and wool yield, loss of sales of breeding stock and deaths from internal involvement. Treatment is costly and ineffective; the most cost-effective strategy is timely immunisation. Various vaccine strategies have been tested, and recombinant vaccines are a promising alternative. Thus, in this study, different vaccine formulations using a recombinant protein (rCP40) and the CP09 live recombinant strain were evaluated. Five groups of 10 mice each were immunised with saline (G1), rCP40 (G2), CP09 (G3), a combination of CP09 and rCP40 (G4) and a heterologous prime-boost strategy (G5). Mice received two immunisations within 15 days. On day 30 after primary immunisation, all groups were challenged with a C. pseudotuberculosis virulent strain. Mice were monitored and mortality was recorded for 30 days after challenge. RESULTS: The G2, G4 and G5 groups showed high levels of IgG1 and IgG2a; G2 presented significant IgG2a production after virulent challenge in the absence of IgG1 and IgG3 induction. Thirty days after challenge, the mice survival rates were 20 (G1), 90 (G2), 50 (G3), 70 (G4) and 60% (G5). CONCLUSIONS: rCP40 is a promising target in the development of vaccines against caseous lymphadenitis.


Assuntos
Vacinas Bacterianas/uso terapêutico , Infecções por Corynebacterium/prevenção & controle , Corynebacterium pseudotuberculosis/genética , Linfadenite/prevenção & controle , Vacinas Sintéticas/uso terapêutico , Animais , Linhagem Celular Tumoral , Clonagem Molecular , Infecções por Corynebacterium/microbiologia , Corynebacterium pseudotuberculosis/imunologia , DNA Bacteriano/genética , Linfadenite/microbiologia , Camundongos/imunologia , Camundongos/microbiologia , Camundongos Endogâmicos BALB C , Mutação/genética , Reação em Cadeia da Polimerase
10.
Int J Cardiol Heart Vasc ; 52: 101407, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38617820

RESUMO

Background: Studies evaluating physical activity (PA) levels in individuals with Chagas disease (CD) are still scarce. The present study aimed to evaluate PA levels in CD individuals and examine their association with Chagas heart disease (ChHD). Methods: We included patients with CD regularly followed in a reference center for treatment of infectious diseases. PA levels were assessed using the short version of the International Physical Activity Questionnaire (IPAQ). ChHD was determined following the Brazilian Consensus on Chagas Disease. The association between ChHD and levels of PA (total, walking, moderate, and vigorous) as a continuous variable was fitted using generalized linear models. Logistic regression models were fitted to evaluate the association between ChHD and meeting WHO's PA recommendations. Results: Among the 361 participants included in the analysis (60.7 ± 10.7 years; 56.2 % women), 58.1 % (n = 210) complied with the WHO's PA recommendations. After adjustments for potential confounders, regression analyses revealed that ChHD without heart failure was significantly associated with reduced vigorous PA (Exp ß 0.32 95 % CI 0.10 to 0.98). ChHD with heart failure had significantly lower levels of total (Exp ß 0.61 95 % CI 0.44 to 0.84) and moderate (Exp ß 0.59 95 % CI 0.39 to 0.89) PA. ChHD with heart failure had a lower odd of meeting the PA recommendation in comparison to those with no cardiac involvement (OR 0.48 95 % CI 0.24 to 0.97). Conclusions: We found low levels of PA among individuals with CD. Presence of ChHD (mainly with HF) was associated with decreased levels of PA.

11.
Sci Rep ; 14(1): 8208, 2024 04 08.
Artigo em Inglês | MEDLINE | ID: mdl-38589582

RESUMO

To investigate the effect of an exercise-based cardiac rehabilitation program on the quality of life (QoL) of patients with chronic Chagas cardiomyopathy (CCC). PEACH study was a single-center, superiority randomized clinical trial of exercise training versus no exercise (control). The sample comprised Chagas disease patients with CCC, left ventricular ejection fraction < 45%, without or with HF symptoms (CCC stages B2 or C, respectively). QoL was assessed at baseline, after three months, and at the end of six months of follow-up using the SF-36 questionnaire. Patients randomized for the exercise group (n = 15) performed exercise training (aerobic, strength and stretching exercises) for 60 min, three times a week, during six months. Patients in the control group (n = 15) were not provided with a formal exercise prescription. Both groups received identical nutritional and pharmaceutical counseling during the study. Longitudinal analysis of the effects of exercise training on QoL, considering the interaction term (group × time) to estimate the rate of changes between groups in the outcomes (represented as beta coefficient), was performed using linear mixed models. Models were fitted adjusting for each respective baseline QoL value. There were significant improvements in physical functioning (ß = + 10.7; p = 0.02), role limitations due to physical problems (ß = + 25.0; p = 0.01), and social functioning (ß = + 19.2; p < 0.01) scales during the first three months in the exercise compared to the control group. No significant differences were observed between groups after six months. Exercise-based cardiac rehabilitation provided short-term improvements in the physical and mental aspects of QoL of patients with CCC.Trial registration: ClinicalTrials.gov Identifier: NCT02517632; August 7, 2015.


Assuntos
Reabilitação Cardíaca , Cardiomiopatia Chagásica , Insuficiência Cardíaca , Humanos , Reabilitação Cardíaca/métodos , Qualidade de Vida , Cardiomiopatia Chagásica/terapia , Volume Sistólico , Função Ventricular Esquerda , Terapia por Exercício/métodos , Exercício Físico , Infecção Persistente
12.
Rev Soc Bras Med Trop ; 56: 0389, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38088665

RESUMO

The increase in inflammatory markers associated with persistent chronic fibrosing myocarditis, a characteristic of chronic Chagas disease, can result in a reduction in inspiratory muscle strength (IMS) in Chagas cardiomyopathy (CC). However, literature in this field is still scarce. This review aimed to map and summarize the evidence regarding IMS in patients with CC. The inclusion criteria included reports with adult participants with a CC diagnosis, with or without heart failure (HF). The core concept examined was the maximum inspiratory pressure evaluated in the untrained and trained groups in the pre-training period. The context was open, including but not limited to hospitals and health centers. Two authors independently identified eligible studies and extracted the data. Descriptive synthesis was used as the primary strategy for analyzing the results. Nine studies (five clinical trials, three cross-sectional, and one cohort) were included. The CC classification differed among the studies, with no mention of HF in five and no CC staging specification in six. IMS was assessed using a manovacuometer, and only six studies analyzed and interpreted the data concerning the predicted values. The CC population with HF appeared to have impaired IMS. All studies involved only Brazilian volunteers. In conclusion, randomized clinical trials evaluating IMS and the effects of inspiratory muscle training need to be conducted to better understand the prevalence and risk of inspiratory muscle weakness in the CC population, as well as the effects of training. Such studies should be conducted at different stages of CC in different populations and countries.


Assuntos
Cardiomiopatia Chagásica , Adulto , Humanos , Estudos Transversais , Força Muscular/fisiologia , Doença Crônica , Brasil , Músculos Respiratórios
13.
Disabil Rehabil ; 45(1): 51-56, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-35007459

RESUMO

PURPOSE: The aim of the present study was to evaluate the effects of cardiovascular rehabilitation (CR) on functional capacity of patients with chronic chagasic cardiomyopathy (CCC) and to compare the responses between CCC patients without and with heart failure (HF). MATERIALS AND METHODS: A longitudinal observational retrospective study was carried out including 36 patients with CCC without HF (stage B2 [n = 7]) and with HF (stage C [n = 29]), who participated in a CR program. Functional capacity was assessed by a maximal progressive cardiopulmonary exercise test performed on a treadmill. The longitudinal effects of the CR on functional capacity were determined by linear mixed models that included an interaction term to evaluate the differential responses between patients without and with HF. RESULTS: Significant improvements in peak oxygen consumption, resting heart rate and blood pressure, and maximum pulmonary ventilation were observed for the overall study sample, with no apparent differential effects according to the presence of HF. CONCLUSIONS: CR significantly improved functional capacity of patients with CCC. The responses to CR appear to be similar among patients without and with HF, reinforcing the need for its inclusion as a standard treatment strategy of CCC.Implications for rehabilitationExercise-based cardiovascular rehabilitation (CR) is a safe strategy that improves functional capacity, cardiac function, and quality of life in patients with several cardiovascular diseases, and recent studies also suggested a potential beneficial effect of CR in chronic chagasic cardiomyopathy (CCC).In this observational study, CR seems to equally improve exercise capacity, resting heart rate, resting blood pressure, and maximum pulmonary ventilation in patients with CCC without (stage B2) and with heart failure (stage C).Cardiovascular rehabilitation should be included as a standard treatment strategy for patients with CCC, regardless the severity of cardiomyopathy.


Assuntos
Reabilitação Cardíaca , Cardiomiopatias , Insuficiência Cardíaca , Humanos , Qualidade de Vida , Estudos Retrospectivos , Insuficiência Cardíaca/complicações , Cardiomiopatias/etiologia
15.
J Bacteriol ; 194(23): 6620-1, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23144380

RESUMO

The bacterium Corynebacterium pseudotuberculosis is of major veterinary importance because it affects livestock, particularly sheep, goats, and horses, in several countries, including Australia, Brazil, the United States, and Canada, resulting in significant economic losses. In the present study, we describe the complete genome of the Corynebacterium pseudotuberculosis Cp316 strain, biovar equi, isolated from the abscess of a North American horse.


Assuntos
Corynebacterium pseudotuberculosis/genética , DNA Bacteriano/química , DNA Bacteriano/genética , Genoma Bacteriano , Análise de Sequência de DNA , Abscesso/microbiologia , Abscesso/veterinária , Animais , California , Infecções por Corynebacterium/microbiologia , Infecções por Corynebacterium/veterinária , Corynebacterium pseudotuberculosis/isolamento & purificação , Doenças dos Cavalos/microbiologia , Cavalos , Dados de Sequência Molecular
16.
J Bacteriol ; 194(12): 3199-215, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22505676

RESUMO

Corynebacterium diphtheriae is one of the most prominent human pathogens and the causative agent of the communicable disease diphtheria. The genomes of 12 strains isolated from patients with classical diphtheria, endocarditis, and pneumonia were completely sequenced and annotated. Including the genome of C. diphtheriae NCTC 13129, we herewith present a comprehensive comparative analysis of 13 strains and the first characterization of the pangenome of the species C. diphtheriae. Comparative genomics showed extensive synteny and revealed a core genome consisting of 1,632 conserved genes. The pangenome currently comprises 4,786 protein-coding regions and increases at an average of 65 unique genes per newly sequenced strain. Analysis of prophages carrying the diphtheria toxin gene tox revealed that the toxoid vaccine producer C. diphtheriae Park-Williams no. 8 has been lysogenized by two copies of the ω(tox)(+) phage, whereas C. diphtheriae 31A harbors a hitherto-unknown tox(+) corynephage. DNA binding sites of the tox-controlling regulator DtxR were detected by genome-wide motif searches. Comparative content analysis showed that the DtxR regulons exhibit marked differences due to gene gain, gene loss, partial gene deletion, and DtxR binding site depletion. Most predicted pathogenicity islands of C. diphtheriae revealed characteristics of horizontal gene transfer. The majority of these islands encode subunits of adhesive pili, which can play important roles in adhesion of C. diphtheriae to different host tissues. All sequenced isolates contain at least two pilus gene clusters. It appears that variation in the distributed genome is a common strategy of C. diphtheriae to establish differences in host-pathogen interactions.


Assuntos
Corynebacterium diphtheriae/genética , Corynebacterium diphtheriae/isolamento & purificação , Difteria/microbiologia , Endocardite Bacteriana/microbiologia , Variação Genética , Genoma Bacteriano , Pneumonia Bacteriana/microbiologia , DNA Bacteriano/química , DNA Bacteriano/genética , Deleção de Genes , Transferência Genética Horizontal , Genes Bacterianos , Ilhas Genômicas , Glicolipídeos/genética , Humanos , Dados de Sequência Molecular , Mutagênese Insercional , Prófagos/genética , Regulon , Análise de Sequência de DNA
17.
J Bacteriol ; 194(23): 6663-4, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23144408

RESUMO

Corynebacterium pseudotuberculosis is of major veterinary importance because it affects many animal species, causing economically significant livestock diseases and losses. Therefore, the genomic sequencing of various lines of this organism, isolated from different hosts, will aid in the development of diagnostic methods and new prevention and treatment strategies and improve our knowledge of the biology of this microorganism. In this study, we present the genome of C. pseudotuberculosis Cp31, isolated from a buffalo in Egypt.


Assuntos
Corynebacterium pseudotuberculosis/genética , DNA Bacteriano/química , DNA Bacteriano/genética , Genoma Bacteriano , Análise de Sequência de DNA , Animais , Búfalos/microbiologia , Corynebacterium pseudotuberculosis/isolamento & purificação , Egito , Dados de Sequência Molecular
19.
J Bacteriol ; 194(20): 5718-9, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23012291

RESUMO

Corynebacterium pseudotuberculosis is a pathogen of great veterinary and economic importance, since it affects livestock, mainly sheep and goats, worldwide, together with reports of its presence in camels in several Arabic, Asiatic, and East and West African countries, as well as Australia. In this article, we report the genome sequence of Corynebacterium pseudotuberculosis strain Cp162, collected from the external neck abscess of a camel in the United Kingdom.


Assuntos
Corynebacterium pseudotuberculosis/genética , DNA Bacteriano/química , DNA Bacteriano/genética , Genoma Bacteriano , Análise de Sequência de DNA , Abscesso/microbiologia , Abscesso/veterinária , Animais , Camelus , Infecções por Corynebacterium/microbiologia , Infecções por Corynebacterium/veterinária , Corynebacterium pseudotuberculosis/isolamento & purificação , Dados de Sequência Molecular , Reino Unido
20.
J Bacteriol ; 194(17): 4736-7, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22887652

RESUMO

Here, we report the whole-genome sequences of two ovine-pathogenic Corynebacterium pseudotuberculosis isolates: strain 3/99-5, which represents the first C. pseudotuberculosis genome originating from the United Kingdom, and 42/02-A, the second from Australia. These genome sequences will contribute to the objective of determining the global pan-genome of this bacterium.


Assuntos
Infecções por Corynebacterium/veterinária , Corynebacterium pseudotuberculosis/genética , Genoma Bacteriano , Doenças dos Ovinos/microbiologia , Animais , Austrália , Sequência de Bases , Mapeamento Cromossômico , Infecções por Corynebacterium/microbiologia , Corynebacterium pseudotuberculosis/classificação , Corynebacterium pseudotuberculosis/isolamento & purificação , Linfadenite/microbiologia , Linfadenite/veterinária , Dados de Sequência Molecular , Escócia , Análise de Sequência de DNA , Ovinos/microbiologia
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