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Dias Ferreira Reis JP, Mano T, Valente B, Monteiro A, Silva Cunha P, Oliveira M, Pereira Da Silva T, Soares R, Rio P, Moura Branco L, Ferreira R. P175 Cardiac device infection: to extract or not to extract, that is the question. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
The incidence of infectious complications related to intracardiac devices has been increasing in recent year and is associated with a poor prognosis, which is determined not only by the infectious process but also by the severity of the underlying cardiac pathology and the spectrum of comorbidities presented. Appropriate antibiotic therapy and extraction of the devices are fundamental in the management of these patients.
Case report
We describe the case of a 66-year-old patient on a waiting list for transplantation due to non-ischemic dilated cardiomyopathy with poor left ventricular systolic function (LVEF of 10%), with severe functional mitral regurgitation and severe pulmonary hypertension, who received a CRT-D for secondary prevention (non-responder). He was admitted for decompensated heart failure (NYHA functional class IV and "dry-cold" profile) requiring inotropic support becoming dependent on dobutamine. During hospitalization, there was a progressive increase in inflammatory markers accompanied by recurrent febrile peak and inflammatory signs of the central venous catheter, with catheter-tip and serial hemocultures positive for Morganella morganii. Piperacillin / tazobactam was started. Due to the lack of response to pathogen directed antibiotic therapy, he underwent a transesophageal echocardiogram (TEE) that revealed several filiform images associated with the electrodes, with no image of valvular vegetations, which led to the association of gentamicin and device extraction (DE), according to the Pisa technique, that occurred without complications. On the 7th day after DE, there was a progressive clinical deterioration in spite of increasing doses of inotropes and vasopressors. It was considered that patient would not be candidate for cardiac transplantation or mechanical ventricular assist, and died on the 118th day of hospitalization in refractory cardiogenic shock.
Conclusion
Device endocarditis is a class I indication for intracardiac DE and TEE is fundamental in its diagnosis. Despite being a considered a non-responder to cardiac resynchronization therapy based on clinical and echocardiographic criteria, this case illustrates how the loss of cardiac resynchronization may have contributed to the patient’s hemodynamic deterioration and have played a fundamental role in the clinical outcome.
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Brisbois M, Silva H, Santos A, Canasta H, Feno A, Cabral L, Soares R. A Bridge to Wellness: Gains from a health fair among fishermen in the Port of New Bedford, USA. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz186.484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Globally, it has been noted that fishermen have a higher mortality from cardiovascular disease, cancer, and injury from work-related accidents when compared to the general population. A potential increase in unemployment in fishermen in New Bedford could result in a lower income level which relates to an increase in risk behaviors, less health screenings, and negative health behaviors. While there is a lack of health-related data among fishermen across the globe, there is little information regarding the health among fishermen, who are predominantly immigrants, in the US.
Objectives
The objectives include designing a health promotion fair to prepare nursing students with the skills to educate fishermen associated with nutrition, diabetes mellitus, cancer and hypertension as identified by key informants in the community.
Results
Students expressed gains in achieving nursing competencies related to collaboration, communication, and teaching/learning by designing a fair with stations related to the four health topics with posters and activities. Educational materials were available in both Portuguese and English to support this aggregate who expressed learning new knowledge. Networking among local fishing agencies, nursing students and the fishermen supported this project from start to finish.
Conclusions
Despite limited access to this vulnerable group, learning nursing competencies and increased fishermen’s knowledge were realized. Connecting students with vulnerable populations is an effective way to promote learning for both groups.
Key messages
Multiple gains are noted when nursing students are paired with vulnerable community aggregates. Learning to work in the community with local agencies and groups is an effective teaching/learning pedagogy.
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Brisbois M, Silva H, Soares R, Cabral L, Canasta H, Feno A, Santos A. Bridging Generations: Sharing stories from the past with the future. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz186.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
As the immigration population continues to grow; little is known about this phenomenon from the immigrants’ perspective. In recent years, nurses have embraced narrative inquiry to better understand the human experience. When relaying their stories, vulnerable groups legitimize their behavior, share their emotional experiences, and amplify their voices that may have otherwise remained silent.
Objective
Eight elderly Portuguese women who immigrated to the United States (US) were interviewed about their experience of immigration by nursing students from Portugal and U.S., as part of a student exchange. The objective of this project was to better understand the impact of immigration through narrative inquiry.
Results
On average, the women lived in the US for approximately fifty years; immigrating in their early twenties. Most women arrived alone or accompanied by spouse and/or children. Their first memories were related to snow, and solitude of being in a new country. The participants attended classes to obtain documents or learn English. All worked in the textile industry; their greatest accomplishment was buying their own house. Challenges faced were related to language and difficult jobs. Overall, they had no regrets except in leaving family members behind. Their message to the students was that love and family are most important in the world. Students were able to realize emigration and immigration from their respective countries.
Conclusions
Rich descriptions provided an in-depth understanding of the details of the women’s experience. Student nurses gained valuable skills and knowledge to understand the impact of immigration among Portuguese women using narrative inquiry.
Key messages
The use of narrative inquiry proved to be a valuable method to interview Portuguese immigrant women. Every immigrant has a unique narrative to share that allowed for nursing student’s appreciation of the experience across generations.
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Zaglia T, Prando V, Bertoli S, Favaro G, Di Mauro V, Guescini M, Di Bona A, Lo Verso F, Soares R, Da Costa Martins P, Catalucci D, Mongillo M, Sandri M. 262Circulating muscle-derived mir-206 links skeletal muscle dysfunction to cardiac autonomic denervation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Purpose
Recent studies and our preliminary data demonstrate that muscle-specific ablation of the autophagy-related protein Atg7, leads to block of autophagy, sarcopenia and destabilization of the neuro-muscular junction (NMJ). In addition, Atg7 knock-out (Atg7 KO) muscle fibers release exosomes containing the muscle specific, miR-206, which is consistently elevated in the plasma. Interestingly, we found that miR-206 content was elevated in the heart, suggesting cardiac uptake of the miR-carrying circulating exosomes. We thus aimed at defining the effects of miR-206 on heart homeostasis.
Methods
Here, we analyzed the cardiac phenotype of adult (12mo.) and aged (24mo.) Atg7 KO mice, as well as of adult C57BL/6J mice injected, via tail vein, with scramble- or miR-206-loaded exosomes. Exosomes were isolated from EDL muscle of control and Atg7 KO mice, as well as from HEK293 cells. Heart function was assessed by echocardiography and ECG-telemetry. Confocal IF, whole-mount IF on heart blocks and multiphoton imaging were used to assess heart structure and sympathetic innervation. Bioinformatics, molecular and biochemical analyses were performed to identify novel targets of miR-206. IF, BRET assay and imaging of TrKA translocation were performed in cultured sympathetic neurons (SNs).
Results
We demonstrate that circulating exosomes, containing miR-206, are taken up by the heart leading to sympathetic dysinnervation, accompanied to reduction in the neurogenic control of cardiac rhythm and increased arrhythmogenesis. In vitro assays demonstrated that exosome-carried miR-206 targets cardiac SNs (cSNs), compromising cell structure and function. Indeed, increased miR-206 expression is accompanied by cSN atrophy, irregular axonal distribution of the active neurotransmitter release sites, and reduction in axonal sprouting. These effects are likely attributed to the miR-206-mediated down-regulation of the NGF receptor p75, as demonstrated by bioinformatics, luciferase assay, molecular and biochemical analyses in vitro and ex vivo. BRET assay, performed in cultured SNs treated with exosomes carrying miR-206, showed reduced formation of p75/TrkA complexes, which generate high-affinity binding sites for NGF and enhance neurotrophin responsiveness. Consistent with impaired NGF retrograde transport, miR-206 over-expressing SNs displayed reduced NGF protein content and decreased phosphorylation of Akt, which is an NGF downstream target, regulating neuronal survival. Interestingly, these latter results were confirmed in the stellate ganglia from Atg KO and miR-206 treated mice.
miR-206 causes heart dysinnervation
Conclusions
We identify miR-206 as a key molecular player in the “muscle-to-heart” communication. miR-206 may participate to the pathogenesis of secondary cardiac dysfunction in skeletal muscle diseases associated to increased circulating levels of miR-206, ranging from ageing to neurodegenerative disorders (i.e. ALS, DMD).
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Valentim Goncalves A, Galrinho A, Pereira-Da-Silva T, Ilhao Moreira R, Soares R, Moura Branco L, Rio P, Feliciano J, Abreu J, Timoteo AT, Mendonca T, Reis J, Mano T, Cruz Coutinho M, Cruz Ferreira R. 4940Early reverse remodelling assessed by myocardial work after sacubitril-valsartan therapy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Sacubitril/Valsartan (LCZ696) had prognosis benefit demonstrated in PARADIGM-HF trial, however less is known about his effects in cardiac dimensions and function.
Myocardial work (MW) is a new transthoracic echocardiographic (TTE) parameter. None is known about the effects of LCZ696 therapy in MW parameters.
Purpose
The aim of this study was to prospectively compare several TTE parameters, including MW, before and after LCZ696 therapy.
Methods
Prospective evaluation of chronic HF patients with optimized standard of care therapy and LVEF≤40%, in which LCZ696 therapy was started.
TTE study was performed before and 6 months after LCZ696 therapy. A semiautomated analysis of GLS was performed and MW were estimated using custom software of GE Vivid E95 ultrasound system.
Results
Of the 42 patients, 35 (83.3%) completed the 6 months follow-up, since 2 patients (4.8%) died and 5 patients (11.9%) discontinued treatment for adverse events. Mean age was 58.6±11.1 years with 82.9% of male patients.
LV dimensions and atrial volumes were significantly lower at 6 months of treatment. LVEF had a mean absolute raise of 8.9% and GLS a relative decrease of 27.8%. MW had a significant increase in constructive work (720.2mmHg VS 900.6mmHg, p=0.016) and work efficiency (78.6% VS 86.6%, p=0.027), with a non-significant decrease in the wasted work (150.2mmHg VS 136.8mmHg, p=0.441).
TTE data before and after 6 months of LCZ696 treatment Time 0 6 months p LV end-diastolic diameter (mm) 71.3±8.4 66.9±7.6 0.001 LV end-systolic diameter (mm) 57.8±9.4 53.1±9.3 0.002 Interventricular septum (mm) 9.6±1.7 9.9±1.9 0.280 LVEF (%) 29.3±6.4 38.2±8.9 <0.001 GLS (%) −7.0±2.9 −8.9±2.8 0.001 MW – Constructive (mmHg) 720.2±230.5 900.6±343.2 0.016 MW – Wasted (mmHg) 150.2±83.3 136.8±54.2 0.441 MW – Efficiency (%) 78.6±10.8 86.6±12.0 0.027 E/e' 13.7±4.5 12.8±4.9 0.449 Pulmonary artery systolic pressure (mmHg) 38.3±12.2 30.9±10.6 <0.001 Left atrium volume (ml/m2) 51.5±22.6 43.7±15.8 0.004 Right atrium volume (ml/m2) 33.1±4.4 28.5±13.5 0.036 TAPSE (mm) 19.2±4.4 20.0±4.9 0.404
Conclusion
LCZ696 therapy is associated with signs of reverse remodelling in TTE, including an increase in constructive work and work efficiency.
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Cunha N, Marques B, Soares R, Raquel M, Couto J, Santos J, Martins T, Rodrigues F, Valido F. Thyrotropin receptor stimulating immunoglobulin: Clinical utility in graves’ disease diagnosis. Clin Chim Acta 2019. [DOI: 10.1016/j.cca.2019.03.743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Silva-Cardoso J, Brás D, Canário-Almeida F, Andrade A, Oliveira L, Pádua F, Fonseca C, Bragança N, Carvalho S, Soares R, Santos JF. Neurohormonal modulation: The new paradigm of pharmacological treatment of heart failure. Rev Port Cardiol 2019; 38:175-185. [PMID: 31029493 DOI: 10.1016/j.repc.2018.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 07/30/2018] [Accepted: 10/29/2018] [Indexed: 12/15/2022] Open
Abstract
The current paradigm of medical therapy for heart failure with reduced ejection fraction (HFrEF) is triple neurohormonal blockade with an angiotensin-converting enzyme inhibitor (ACEI), a beta-blocker (BB) and a mineralocorticoid receptor antagonist (MRA). However, three-year mortality remains over 30%. Stimulation of counter-regulatory systems in addition to neurohormonal blockade constitutes a new paradigm, termed neurohormonal modulation. Sacubitril/valsartan is the first element of this new strategy. PARADIGM-HF was the largest randomized clinical trial conducted in HFrEF. It included 8442 patients and compared the efficacy and safety of sacubitril/valsartan versus enalapril. The primary endpoint was the composite of cardiovascular mortality and hospitalization due to HF, which occurred in 914 (21.8%) patients receiving sacubitril/valsartan and in 1117 (26.5%) patients receiving enalapril (HR 0.8, 95% CI 0.73-0.87, p=0.0000002; NNT 21). Sacubitril/valsartan reduced both primary endpoint components, as well as sudden cardiac death, death due to worsening HF, and death from all causes. Patients on sacubitril/valsartan reported less frequent deterioration of HF and of quality of life, and discontinued study medication less frequently because of an adverse event. PARADIGM-HF demonstrated the superiority of sacubitril/valsartan over enalapril, with a 20% greater impact on cardiovascular mortality compared to ACEIs. Accordingly, in 2016, the European (ESC) and American (ACC/AHA/HFSA) cardiology societies simultaneously issued a class I recommendation for the replacement of ACEIs by sacubitril/valsartan in patients resembling PARADIGM-HF trial participants.
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Silva-Cardoso J, Brás D, Canário-Almeida F, Andrade A, Oliveira L, Pádua F, Fonseca C, Bragança N, Carvalho S, Soares R, Santos JF. Neurohormonal modulation: The new paradigm of pharmacological treatment of heart failure. REVISTA PORTUGUESA DE CARDIOLOGIA (ENGLISH EDITION) 2019. [DOI: 10.1016/j.repce.2019.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Almeida J, Costa J, Coelho P, Cea V, Galesio M, Noronha JP, Diniz MS, Prudêncio C, Soares R, Sala C, Fernandes R. Adipocyte proteome and secretome influence inflammatory and hormone pathways in glioma. Metab Brain Dis 2019; 34:141-152. [PMID: 30302719 DOI: 10.1007/s11011-018-0327-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 09/27/2018] [Indexed: 01/09/2023]
Abstract
Gliomas represent the most common primary malignant brain tumors in adults, with an extremely poor prognosis. Among several risk factors, lifestyle was also recently identified as a major risk factor for the development of primary glioma. In the present study, we explore the relationship between obesity and glioma in a cellular model. Thus, we have study the influence of adipocytes secretome on glioma cell line GL261. Using the 3T3-L1 adipocyte cell line, and its conditioned medium (adipokines-enriched medium), we showed that adipocyte-released factors relate with glioma angiogenic, growth, hormones and metabolic behavior by MALDI-TOF-MS and proteomic array analysis. In a first view, STI1, hnRNPs and PGK1 are under expressed on CGl. Similarly, both carbonic anhydrase and aldose reductase are even suppressed in glioma cells that grown under adipokines-enriched environment. Contrariwise, RFC1, KIF5C, ANXA2, N-RAP and RACK1 are overexpressed in GL261 cell the in the presence of the adipokines-enriched medium. We further identified the factors that are released by adipocyte cells, and revealed that several pro-inflammatory and angiogenic factors, such as IL-6, IL-11, LIF, PAI-1, TNF-α, endocan, HGF, VEGF IGF-I, were secreted to the medium into a high extent, whereas TIMP-1 and SerpinE1 were under expressed on CGl. This study discloses an interesting in vitro model for the study of glioma biology under a "obesity" environment, that can be explored for the understanding of cancer cells biology, for the search of biomarkers, prognostic markers and therapeutic approaches.
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Mateus J, Gomes M, Soares R, Paulo S, Chora Â, Sebastião A, Xapelli S. From neural stem cells to oligodendrocytes: postnatal oligodendrogenesis as a target for MS therapy. Front Cell Neurosci 2019. [DOI: 10.3389/conf.fncel.2019.01.00047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ilhao Moreira R, Pereira Da Silva T, Goncalves A, Mano T, Mendonca T, Coutinho Cruz M, Morais L, Rodrigues I, Feliciano J, Abreu A, Soares R, Cruz Ferreira R. P6521Comparison of peak oxygen consumption and percent of predicted oxygen consumption for predicting prognosis in young and female heart failure patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Carvalho Mendonca TJ, Abreu A, Rodrigues I, Portugal G, Rio P, Goncalves A, Santa Clara H, Santos V, Cunha P, Oliveira M, Soares R, Silva S, Ferreira R. P634Which variables can predict prognosis in heart failure patients after cardiac resynchronization? Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ilhao Moreira R, Pereira Da Silva T, Goncalves A, Reis J, Mano T, Coutinho Cruz M, Morais L, Rodrigues I, Modas Daniel P, Mendonca T, Feliciano J, Abreu A, Soares R, Cruz Ferreira R. 5221Impact of cardiorespiratory fitness in the obesity paradox in heart failure with reduced ejection fraction. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Valentim Goncalves A, Abreu A, Soares R, Pereira-Da-Silva T, Feliciano J, Ilhao Moreira R, Rio P, Mendonca T, Coutinho Cruz M, Rodrigues I, Modas Daniel P, Aguiar Rosa S, Morais L, Cruz Ferreira R. P3751Sub-maximal cardiopulmonary exercise test in heart failure patients: value of ve/vco2 slope in 1-year risk stratification. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Langley S, Uribe J, Uribe-Lewis S, Money-Kyrle J, Perna C, Khaksar S, Soares R, Laing R. Comparative Analysis of Clinical Outcomes and Procedural Costs between the Conventional Two-stage Technique and 4D Brachytherapy for Early Prostate Cancer. Clin Oncol (R Coll Radiol) 2018; 30:57-64. [DOI: 10.1016/j.clon.2017.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 09/05/2017] [Accepted: 09/12/2017] [Indexed: 10/18/2022]
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Ashton A, Soares R. Management of Benign Prostatic Enlargement: is There a Limit to our Resection? Int J Surg 2017. [DOI: 10.1016/j.ijsu.2017.08.492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Silva T, Soares R, Feliciano J, Abreu A, Coutinho M, Moreira R, Rosa S, Almeida-Morais L, Rodrigues I, Portugal G, Teixeira P, Cruz Ferreira R. P1487The value for risk stratification of ventilatory efficiency measured in different moments during exercise and comparison to the gold standard peak oxygen consumption. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Silva T, Soares R, Feliciano J, Abreu A, Coutinho M, Moreira R, Rosa S, Almeida-Morais L, Rodrigues I, Portugal G, Monteiro A, Cruz Ferreira R. P6185How do peak oxygen consumption, ventilator efficiency slope and end-tidal carbon dioxide partial pressure perform in the short-, long- and very long-term risk stratification in heart failure? Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Soares R, Ribeiro FF, Xapelli S, Genebra T, Ribeiro MF, Sebastião AM, Rodrigues CMP, Solá S. Tauroursodeoxycholic Acid Enhances Mitochondrial Biogenesis, Neural Stem Cell Pool, and Early Neurogenesis in Adult Rats. Mol Neurobiol 2017; 55:3725-3738. [PMID: 28534273 DOI: 10.1007/s12035-017-0592-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 04/28/2017] [Indexed: 01/10/2023]
Abstract
Although neurogenesis occurs in restricted regions of the adult mammalian brain, neural stem cells (NSCs) produce very few neurons during ageing or after injury. We have recently discovered that the endogenous bile acid tauroursodeoxycholic acid (TUDCA), a strong inhibitor of mitochondrial apoptosis and a neuroprotective in animal models of neurodegenerative disorders, also enhances NSC proliferation, self-renewal, and neuronal conversion by improving mitochondrial integrity and function of NSCs. In the present study, we explore the effect of TUDCA on regulation of NSC fate in neurogenic niches, the subventricular zone (SVZ) of the lateral ventricles and the hippocampal dentate gyrus (DG), using rat postnatal neurospheres and adult rats exposed to the bile acid. TUDCA significantly induced NSC proliferation, self-renewal, and neural differentiation in the SVZ, without affecting DG-derived NSCs. More importantly, expression levels of mitochondrial biogenesis-related proteins and mitochondrial antioxidant responses were significantly increased by TUDCA in SVZ-derived NSCs. Finally, intracerebroventricular administration of TUDCA in adult rats markedly enhanced both NSC proliferation and early differentiation in SVZ regions, corroborating in vitro data. Collectively, our results highlight a potential novel role for TUDCA in neurologic disorders associated with SVZ niche deterioration and impaired neurogenesis.
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Corrêa P, Bueno C, Soares R, Vieira FM, Muniz-Pereira LC. Checklist of helminth parasites of wild primates from Brazil. REV MEX BIODIVERS 2016. [DOI: 10.1016/j.rmb.2016.03.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Incio J, Suboj P, Chin S, Liu H, Soares R, Boucher Y, Fukumura D, Jain R. Proffered Paper: Obesity-induced inflammation and desmoplasia promote pancreatic cancer progression and resistance to chemotherapy. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61017-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rodrigues J, Soares R, Bonito N, Marques M, Jacinto P, Ribeiro J, Valido F, Gervásio H. P-133 Assessment of sexual dysfunction in rectal cancer survivors. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Duarte C, Costa T, Carneiro C, Soares R, Jitariu A, Cardoso S, Piedade M, Bexiga R, Freitas P. Semi-Quantitative Method for Streptococci Magnetic Detection in Raw Milk. BIOSENSORS-BASEL 2016; 6:19. [PMID: 27128950 PMCID: PMC4931479 DOI: 10.3390/bios6020019] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 04/15/2016] [Accepted: 04/21/2016] [Indexed: 12/24/2022]
Abstract
Bovine mastitis is the most costly disease for dairy farmers and the most frequent reason for the use of antibiotics in dairy cattle; thus, control measures to detect and prevent mastitis are crucial for dairy farm sustainability. The aim of this study was to develop and validate a sensitive method to magnetically detect Streptococcus agalactiae (a Group B streptococci) and Streptococcus uberis in raw milk samples. Mastitic milk samples were collected aseptically from 44 cows with subclinical mastitis, from 11 Portuguese dairy farms. Forty-six quarter milk samples were selected based on bacterial identification by conventional microbiology. All samples were submitted to PCR analysis. In parallel, these milk samples were mixed with a solution combining specific antibodies and magnetic nanoparticles, to be analyzed using a lab-on-a-chip magnetoresistive cytometer, with microfluidic sample handling. This paper describes a point of care methodology used for detection of bacteria, including analysis of false positive/negative results. This immunological recognition was able to detect bacterial presence in samples spiked above 100 cfu/mL, independently of antibody and targeted bacteria used in this work. Using PCR as a reference, this method correctly identified 73% of positive samples for streptococci species with an anti-S. agalactiae antibody, and 41% of positive samples for an anti-GB streptococci antibody.
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Sousa M, Machado V, Costa R, Figueira ME, Sepodes B, Barata P, Ribeiro L, Soares R. Red Raspberry Phenols Inhibit Angiogenesis: A Morphological and Subcellular Analysis Upon Human Endothelial Cells. J Cell Biochem 2016; 117:1604-12. [PMID: 26590362 DOI: 10.1002/jcb.25452] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 11/19/2015] [Indexed: 12/14/2022]
Abstract
Polyphenols are a class of natural compounds whose potential as antioxidant, anti-inflammatory, and anti-angiogenesis has been reported in many pathological conditions. Red raspberry extract, rich in polyphenols, has been reported to exert anti-inflammatory effects and prevent cell proliferation in distinct animal models. However, the signaling pathways involved remain unknown. Herein, we used human microvascular endothelial cells (HMVECs) to determine the influence of red raspberry phenolic compound extract concentrations, ranging from 10 to 250 µg gallic acid equivalents (GAE)/mL, on endothelium viability (MTS assay), proliferation (BrdU incorporation), migration (injury assay), and capillary-like structures formation (Matrigel assay). Protein expression in cell lysates was determined by Western blot analysis. We showed that red raspberry extracts reduced cell viability (GI50 = 87,64 ± 6,59 μg GAE/mL) and proliferation in a dose-dependent manner. A significant abrogation of cells ability to migrate to injured areas, even at low concentrations, was observed by injury assay. Cell assembly into capillary-like structures on Matrigel also decreased in a dose dependent-manner for higher extract concentrations, as well as the number of branching points per unit of area. Protein expression analysis showed a dose-dependent decrease in Phospho-VEGFR2 expression, implying abrogation of VEGF signaling activity. We also showed for the first time that red raspberry phenolic compounds induce the rearrangement of filamentous actin cytoskeleton, with an isotropy increase found for higher testing concentrations. Taken together, our findings corroborate the anti-angiogenic potential of red raspberry phenolic compounds and provide new insights into their mode of action upon endothelium. J. Cell. Biochem. 117: 1604-1612, 2016. © 2015 Wiley Periodicals, Inc.
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Rio P, Pereira-Da-Silva T, Abreu A, Filipe C, Soares R, Portugal G, Alves T, Silva S, Mimoso I, Cruz Ferreira R. Modulating effect of cardiac rehabilitation on autonomic nervous system function in patients with coronary artery disease. Acta Cardiol 2016; 71:717-723. [PMID: 27920460 DOI: 10.2143/ac.71.6.3178191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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