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Almirante Tamandare, Brazil

de Fatima Costa A.,Catholic University of Brasilia | Franco O.L.,Catholic University of Brasilia | Franco O.L.,Catholic University Dom Bosco
Journal of Cellular Physiology

Several epidemiologic studies suggest that obesity and hypertension are associated with cardiac transcriptome modifications that could be further associated with inflammatory processes and cardiac hypertrophy. In this field, transcriptome studies have demonstrated their importance to elucidate physiologic mechanisms, pathways or genes involved in many biologic processes. Over the past decade, RNA microarray and RNA-seq analysis has become an essential component to examine metabolic pathways in terms of mRNA expression in cardiology. In this review, cardiac muscle gene expression in response to effects of obesity and hypertension will be focused, providing a broad view on cardiac transcriptome and physiologic and biochemical mechanisms involved in gene expression changes produced by these events, emphasizing the use of new technologies for gene expression analyses. J. Cell. Physiol. 230: 959-968, 2015. © 2014 Wiley Periodicals, Inc. Source

Ribeiro S.M.,Catholic University of Brasilia | De La Fuente-Nunez C.,University of British Columbia | Baquir B.,University of British Columbia | Faria-Junior C.,Laboratorio Central Of Saude Publica Do Distrito Federal | And 3 more authors.
Antimicrobial Agents and Chemotherapy

Multidrug-resistant carbapenemase-producing Klebsiella pneumoniae (KpC) strains are becoming a common cause of infections in health care centers. Furthermore, Klebsiella can develop multicellular biofilms, which lead to elevated adaptive antibiotic resistance. Here, we describe the antimicrobial and antibiofilm activities of synthetic peptides DJK-5, DJK-6, and 1018 against five KpC isolates. Using static microplate assays, it was observed that the concentration required to prevent biofilm formation by these clinical isolates was below the MIC for planktonic cells. More-sophisticated flow cell experiments confirmed the antibiofilm activity of the peptides against 2-day-old biofilms of different KpC isolates, and in some cases, the peptides induced significant biofilm cell death. Clinically relevant combinations of DJK-6 and β-lactam antibiotics, including the carbapenem meropenem, also prevented planktonic growth and biofilm formation of KpC strain1825971. Interestingly, peptide DJK-6 was able to enhance, at least 16-fold, the ability of meropenem to eradicate preformed biofilms formed by this strain. Using peptide DJK-6 to potentiate the activity of β-lactams, including meropenem, represents a promising strategy to treat infections caused by KpC isolates. Copyright © 2015, American Society for Microbiology. All Rights Reserved. Source

Zagatto A.,Federal University of Mato Grosso do Sul | Miranda M.F.,Catholic University Dom Bosco | Gobatto C.A.,University of Campinas
International Journal of Sports Medicine

The purposes of this study were to determine and to compare the critical power concept adapted for the specific table tennis test (critical frequency Cf) estimated from 5 mathematical models and using 2 different exhaustion criteria (voluntary and technical exhaustions). Also, it was an aim to assess the relationship between Cf estimated from mathematical models and respiratory compensation point (RCP), peak oxygen uptake (VO2PEAK) and minimal intensity at which VO2PEAK (fVO2PEAK) appears. 9 male table tennis players [18(1) years; 62.3(4.4)kg] performed the maximal incremental test and 34 exhaustive exercise bouts to estimate Cfs (balls•min-1). The exhaustion time and Cf obtained were independent of the exhaustion criteria. The Cf from 3-parameter model [45.2(7.0)-voluntary, 43.2(5.6)-technical] was lower than Cf estimated by linear 2-parameter models, frequency-time1 [53.5(3.6)-voluntary, 53.5(3.5)-technical] and total ball thrown-time [52.2(3.5)-voluntary, 52.2(3.5)-technical] but significantly correlated. Cf values from 2 linear models were significantly correlated with RCP [47.4(3.4)balls•min -1], and Cf values of the linear and nonlinear models were correlated with f VO2PEAK [56.7(3.4)balls•min1]. However, there were no significant correlations between Cf values and VO2PEAK [49.8(1.1)ml•kg1•min1]. The results were not modified by exhaustion criteria. The 2 linear and non-linear 2-parameter models can be used to estimate aerobic endurance in specific table tennis tests. © Georg Thieme Verlag KG Stuttgart - New York. Source

Gill E.E.,University of British Columbia | Franco O.L.,Catholic University Dom Bosco | Hancock R.E.W.,University of British Columbia
Chemical Biology and Drug Design

The growing number of bacterial pathogens that are resistant to numerous antibiotics is a cause for concern around the globe. There have been no new broad-spectrum antibiotics developed in the last 40 years, and the drugs we have currently are quickly becoming ineffective. In this article, we explore a range of therapeutic strategies that could be employed in conjunction with antibiotics and may help to prolong the life span of these life-saving drugs. Discussed topics include antiresistance drugs, which are administered to potentiate the effects of current antimicrobials in bacteria where they are no longer (or never were) effective; antivirulence drugs, which are directed against bacterial virulence factors; host-directed therapies, which modulate the host's immune system to facilitate infection clearance; and alternative treatments, which include such therapies as oral rehydration for diarrhea, phage therapy, and probiotics. All of these avenues show promise for the treatment of bacterial infections and should be further investigated to explore their full potential in the face of a postantibiotic era. Global incidence of antimicrobial resistance is increasing so there is a great need to prolong the lives of our antibiotics. We review drugs that can be taken in conjunction with antibiotics, or antimicrobial adjuvants. Such therapeutics can increase the effectiveness of antibiotics, target bacterial virulence factors, modulate the immune system to help clear bacterial infections or act via a diverse range of alternative methods. These treatments show great promise and should be further investigated to prevent a post-antibiotic era. © 2014 The Authors. Chemical Biology & Drug Design Published by John Wiley & Sons Ltd. Source

Bermon S.,University of Nice Sophia Antipolis | Bermon S.,Monaco Institute of Sports Medicine and Surgery | Petriz B.,Catholic University of Brasilia | Petriz B.,Centro Universitario | And 6 more authors.
Exercise Immunology Review

The gut microbiota consists of a cluster of microorganisms that produces several signaling molecules of a hormonal nature which are released into the blood stream and act at distal sites. There is a growing body of evidence indicating that microbiota may be modulated by several environmental conditions, including different exercise stimulus, as well some pathologies. Enriched bacterial diversity has also been associated with improved health status and alterations in immune system, making multiple connections between host and microbiota. Experimental evidence has shown that reduced levels and variations in the bacterial community are associated with health impairments, while increased microbiota diversity improves metabolic profile and immunological responses. So far, very few controlled studies have focused on the interactions between acute or chronic exercise and the gut microbiota. However, some preliminary experimental data obtained from animal studies or probiotics studies show some interesting results at the immune level, indicating that the microbiota also acts like an endocrine organ and is sensitive to the homeostatic and physiological changes associated with exercise. Thus, our review intends to shed some light on the interaction between gut microbiota, exercise and immunomodulation. © 2002 by Hinnak Northoff. Source

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