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Teles F, Peçanha de Miranda Coelho JA, Albino RM, Verçosa Pacheco FC, Rodrigues de Oliveira E, Silveira MAD, Diógenes M. Feitosa A, Bezerra R. Effectiveness of thiazide and thiazide-like diuretics in advanced chronic kidney disease: a systematic review and meta-analysis. Ren Fail 2023; 45:2163903. [PMID: 36637019 PMCID: PMC9848247 DOI: 10.1080/0886022x.2022.2163903] [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] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Thiazide diuretics are first-line drugs for the treatment of hypertension, but hypertension treatment guidelines have systematically discouraged their use in patients with advanced chronic kidney disease (CKD). For the first time, a systematic review and random-effects meta-analysis were performed to assess the effectiveness of thiazides and thiazide-like diuretics to treat hypertension in patients with stages 3b, 4, and 5 CKD. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS A systematic review and random-effects meta-analysis that included a literature search using the following databases were performed: MEDLINE through PubMed, Cochrane Database of Systematic Reviews (CDSR) and Cochrane Central Register of Controlled Trials (CENTRAL) through the Cochrane Library, Embase, and ISI - Web of Science (all databases). Prospective studies that evaluated the effectiveness of thiazide and thiazide-like diuretics in individuals with a GFR < 45 mL/min/1.73 m2 were included. RESULTS Five clinical trials, totaling 214 participants, were included, and the mean GFR ranged from 13.0 ± 5.9 mL/min/1.73 m2 to 26.8 ± 8.8 mL/min/1.73 m2. There was evidence of a reduction in mean blood pressure and in GFR, as well as in fractional sodium excretion and fractional chloride excretion. CONCLUSION Thiazide and thiazide-like diuretics seem to maintain their effectiveness in lowering blood pressure in patients with advanced chronic kidney disease. These findings should spur new prospective randomized trials and spark discussions, particularly about upcoming hypertension guidelines.
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Affiliation(s)
- Flávio Teles
- School of Medicine, Federal University of Alagoas (UFAL), Maceió, Brazil,School of Medicine, State University of Health Sciences of Alagoas (UNCISAL), Maceió, Brazil
| | | | - Rosivânia Maria Albino
- School of Medicine, State University of Health Sciences of Alagoas (UNCISAL), Maceió, Brazil
| | | | | | | | | | - Rodrigo Bezerra
- Pernambuco Hypertension Service (SHIP), PROCAPE - University of Pernambuco (UPE), Recife, Brazil,Keizo Asami Laboratory of Immunopathology, Federal University of Pernambuco, Recife, Brazil,CONTACT Rodrigo Bezerra PROCAPE-University of Pernambuco, Brazil. Rua dos Palmares, S/N – Santo Amaro, Recife – PE - CEP: 74970-240, Brazil
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Amorim KCFO, Vitorino PVO, Feitosa ADM, Santos MC, Bezerra R, Lopes LR, Camafort M, Coca A, Sousa ALL, Barroso WKS. Hypertension evaluated in the public and private Brazilian health system hypertension in public and private service. Front Cardiovasc Med 2023; 10:1254933. [PMID: 37795487 PMCID: PMC10545870 DOI: 10.3389/fcvm.2023.1254933] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 08/31/2023] [Indexed: 10/06/2023] Open
Abstract
Introduction Hypertension (HT) remains the leading cause of death worldwide. In Brazil it is estimated that 35% of the adult population has HT and that about 20% of these have blood pressure values within the targets recommended for the reduction of cardiovascular risk. There are some data that point to different control rates in patients treated by cardiologists in public and private referral center and this is an important point to be investigated and discussed. Objective To compare sociodemographic characteristics, body mass index (BMI), antihypertensive (AH) drugs, blood pressure (BP) and control rate in public (PURC) and private (PRRC) referral centers. Methodology A cross-sectional multicenter study that analyzed data from hypertensive patients assisted by the PURC (one in Midwest Region and other in Northeast region) and PRRC (same distribution). Variables analyzed: sex, age, BMI, classes, number of AH used and mean values of systolic and diastolic BP by office measurement and home blood pressure measurement (HBPM). Uncontrolled hypertension (HT) phenotypes and BP control rates were assessed. Descriptive statistics and χ2 tests or unpaired t-tests were performed. A significance level of p < 0.05 was considered. Results A predominantly female (58.9%) sample of 2.956 patients and a higher prevalence of obesity in PURC (p < 0.001) and overweight in PRRC (p < 0.001). The mean AH used was 2.9 ± 1.5 for PURC and 1.4 ± 0.7 for PRRC (p < 0.001). Mean systolic and diastolic BP values were higher in PURC as were rates of uncontrolled HT of 67.8% and 47.6% (p < 0.001) by office measurement and 60.4% and 35.3% (p < 0.001) by HBPM in PURC and PRRC, respectively. Conclusion Patients with HT had a higher prevalence of obesity in the PURC and used almost twice as many AH drugs. BP control rates are worse in the PURC, on average 15.3 mmHg and 12.1 mmHg higher than in the PRRC by office measurement.
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Affiliation(s)
- Kecia C. F. O. Amorim
- Pós Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, Brasil
| | - Priscila Valverde O. Vitorino
- Programa de Pós-graduação Stricto Sensu em Atenção à Saúde, Escola de Ciências Sociais e da Saúde, Pontifícia Universidade Católica de Goiás, Goiânia, Brasil
| | - Audes D. M. Feitosa
- Serviço de Hipertensão de Pernambuco, Procape/UPE, Universidade de Pernambuco, Recife, Brasil
| | - Mayara Cedrim Santos
- Serviço de Hipertensão de Pernambuco, Procape/UPE, Universidade de Pernambuco, Recife, Brasil
| | - Rodrigo Bezerra
- Serviço de Hipertensão de Pernambuco, Procape/UPE, Universidade de Pernambuco, Recife, Brasil
| | - Lais Rocha Lopes
- Departamento de Clínica Médica, Hospital das Clínicas, EBESERH, Goiânia, Brasil
| | - Miguel Camafort
- Hypertension Unit, Hospital Clínic, Barcelona University, Barcelona, Spain
| | - Antonio Coca
- Hypertension Unit, Hospital Clínic, Barcelona University, Barcelona, Spain
| | - Ana Luíza Lima Sousa
- Pós Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, Brasil
- Liga de Hipertensão Arterial, Universidade Federal de Goiás, Goiânia, Brasil
| | - Weimar K. S. Barroso
- Pós Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, Brasil
- Departamento de Clínica Médica, Hospital das Clínicas, EBESERH, Goiânia, Brasil
- Liga de Hipertensão Arterial, Universidade Federal de Goiás, Goiânia, Brasil
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Bezerra R, de Farias FT, Feitosa A, Nadruz W, Brandão AA, Barroso WKS. Suspension of Thiazide Diuretics in Advanced Chronic Kidney Disease. Time to Review an Old Concept. Arq Bras Cardiol 2023; 120:e20230115. [PMID: 37878894 PMCID: PMC10547429 DOI: 10.36660/abc.20230115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/05/2023] [Accepted: 04/05/2023] [Indexed: 10/27/2023] Open
Affiliation(s)
- Rodrigo Bezerra
- Universidade Federal de PernambucoLaboratório de Imunopatologia Keizo AsamiRecifePEBrasilUniversidade Federal de Pernambuco - Laboratório de Imunopatologia Keizo Asami, Recife, PE – Brasil
- Universidade de PernambucoPronto Socorro Cardiológico de PernambucoRecifePEBrasilUniversidade de Pernambuco - Pronto Socorro Cardiológico de Pernambuco (PROCAPE), Recife, PE – Brasil
| | - Flávio Teles de Farias
- Universidade Federal de AlagoasMaceióALBrasilUniversidade Federal de Alagoas, Maceió, AL – Brasil
| | - Audes Feitosa
- Universidade de PernambucoPronto Socorro Cardiológico de PernambucoRecifePEBrasilUniversidade de Pernambuco - Pronto Socorro Cardiológico de Pernambuco (PROCAPE), Recife, PE – Brasil
| | - Wilson Nadruz
- Universidade Estadual de CampinasCampinasSPBrasilUniversidade Estadual de Campinas (UNICAMP), Campinas, SP – Brasil
| | - Andrea Araújo Brandão
- Universidade do Estado do Rio de JaneiroDepartamento de Doenças do TóraxRio de JaneiroRJBrasilUniversidade do Estado do Rio de Janeiro - Departamento de Doenças do Tórax, Rio de Janeiro, RJ – Brasil
| | - Weimar Kunz Sebba Barroso
- Universidade Federal de GoiásServiço de CardiologiaLiga de Hipertensão ArterialGoiâniaGOBrasilUniversidade Federal de Goiás - Serviço de Cardiologia, Liga de Hipertensão Arterial, Goiânia, GO – Brasil
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Bezerra R, Feitosa ADM, Nadruz W. Blood Pressure Measurement: There's More Than Meets the Arm. Arq Bras Cardiol 2023; 120:e20230274. [PMID: 37341297 PMCID: PMC10263400 DOI: 10.36660/abc.20230274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023] Open
Affiliation(s)
- Rodrigo Bezerra
- Laboratório de Imunopatologia Keizo AsamiUniversidade Federal de PernambucoRecifePEBrasilLaboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE – Brasil
- Pronto Socorro Cardiológico de PernambucoUniversidade de PernambucoRecifePEBrasilPronto Socorro Cardiológico de Pernambuco (PROCAPE), Universidade de Pernambuco, Recife, PE – Brasil
| | - Audes D. M. Feitosa
- Pronto Socorro Cardiológico de PernambucoUniversidade de PernambucoRecifePEBrasilPronto Socorro Cardiológico de Pernambuco (PROCAPE), Universidade de Pernambuco, Recife, PE – Brasil
| | - Wilson Nadruz
- Laboratório de Imunopatologia Keizo AsamiUniversidade Federal de PernambucoRecifePEBrasilLaboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE – Brasil
- Departamento de Medicina InternaFaculdade de Ciências MédicasUniversidade Estadual de CampinasCampinasSPBrasilDepartamento de Medicina Interna, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP – Brasil
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Bezerra R, Teles F, Mendonca PB, Damte T, Likaka A, Ferrer-Miranda E, de Albuquerque JO, de Lima Filho JL. Outcomes of critically ill patients with acute kidney injury in COVID-19 infection: an observational study. Ren Fail 2021; 43:911-918. [PMID: 34057014 PMCID: PMC8168780 DOI: 10.1080/0886022x.2021.1933530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/15/2021] [Accepted: 05/17/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Early reports indicate that AKI is common during COVID-19 infection. Different mortality rates of AKI due to SARS-CoV-2 have been reported, based on the degree of organic dysfunction and varying from public to private hospitals. However, there is a lack of data about AKI among critically ill patients with COVID-19. METHODS We conducted a multicenter cohort study of 424 critically ill adults with severe acute respiratory syndrome (SARS) and AKI, both associated with SARS-CoV-2, admitted to six public ICUs in Brazil. We used multivariable logistic regression to identify risk factors for AKI severity and in-hospital mortality. RESULTS The average age was 66.42 ± 13.79 years, 90.3% were on mechanical ventilation (MV), 76.6% were at KDIGO stage 3, and 79% underwent hemodialysis. The overall mortality was 90.1%. We found a higher frequency of dialysis (82.7% versus 45.2%), MV (95% versus 47.6%), vasopressors (81.2% versus 35.7%) (p < 0.001) and severe AKI (79.3% versus 52.4%; p = 0.002) in nonsurvivors. MV, vasopressors, dialysis, sepsis-associated AKI, and death (p < 0.001) were more frequent in KDIGO 3. Logistic regression for death demonstrated an association with MV (OR = 8.44; CI 3.43-20.74) and vasopressors (OR = 2.93; CI 1.28-6.71; p < 0.001). Severe AKI and dialysis need were not independent risk factors for death. MV (OR = 2.60; CI 1.23-5.45) and vasopressors (OR = 1.95; CI 1.12-3.99) were also independent risk factors for KDIGO 3 (p < 0.001). CONCLUSION Critically ill patients with SARS and AKI due to COVID-19 had high mortality in this cohort. Mortality was largely determined by the need for mechanical ventilation and vasopressors rather than AKI severity.
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Affiliation(s)
- Rodrigo Bezerra
- Keizo Asami Laboratory of Immunopathology, Federal University of Pernambuco, Recife, Brazil
- PROCAPE, University of Pernambuco, Recife, Brazil
| | - Flávio Teles
- Clinical Medicine Department, Federal University of Alagoas, Maceio, Brazil
| | | | | | - Andrew Likaka
- Keizo Asami Laboratory of Immunopathology, Federal University of Pernambuco, Recife, Brazil
| | | | - Jones Oliveira de Albuquerque
- Keizo Asami Laboratory of Immunopathology, Federal University of Pernambuco, Recife, Brazil
- Department of Statistics and Informatics, Federal Rural University of Pernambuco, Recife, Brazil
| | - José Luiz de Lima Filho
- Keizo Asami Laboratory of Immunopathology, Federal University of Pernambuco, Recife, Brazil
- Department of Biochemistry, Federal University of Pernambuco, Recife, Brazil
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Winzeck S, Mocking SJT, Bezerra R, Bouts MJRJ, McIntosh EC, Diwan I, Garg P, Chutinet A, Kimberly WT, Copen WA, Schaefer PW, Ay H, Singhal AB, Kamnitsas K, Glocker B, Sorensen AG, Wu O. Ensemble of Convolutional Neural Networks Improves Automated Segmentation of Acute Ischemic Lesions Using Multiparametric Diffusion-Weighted MRI. AJNR Am J Neuroradiol 2019; 40:938-945. [PMID: 31147354 DOI: 10.3174/ajnr.a6077] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 04/19/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Accurate automated infarct segmentation is needed for acute ischemic stroke studies relying on infarct volumes as an imaging phenotype or biomarker that require large numbers of subjects. This study investigated whether an ensemble of convolutional neural networks trained on multiparametric DWI maps outperforms single networks trained on solo DWI parametric maps. MATERIALS AND METHODS Convolutional neural networks were trained on combinations of DWI, ADC, and low b-value-weighted images from 116 subjects. The performances of the networks (measured by the Dice score, sensitivity, and precision) were compared with one another and with ensembles of 5 networks. To assess the generalizability of the approach, we applied the best-performing model to an independent Evaluation Cohort of 151 subjects. Agreement between manual and automated segmentations for identifying patients with large lesion volumes was calculated across multiple thresholds (21, 31, 51, and 70 cm3). RESULTS An ensemble of convolutional neural networks trained on DWI, ADC, and low b-value-weighted images produced the most accurate acute infarct segmentation over individual networks (P < .001). Automated volumes correlated with manually measured volumes (Spearman ρ = 0.91, P < .001) for the independent cohort. For the task of identifying patients with large lesion volumes, agreement between manual outlines and automated outlines was high (Cohen κ, 0.86-0.90; P < .001). CONCLUSIONS Acute infarcts are more accurately segmented using ensembles of convolutional neural networks trained with multiparametric maps than by using a single model trained with a solo map. Automated lesion segmentation has high agreement with manual techniques for identifying patients with large lesion volumes.
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Affiliation(s)
- S Winzeck
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts.,Division of Anaesthesia (S.W.), Department of Medicine, University of Cambridge, Cambridge, UK
| | - S J T Mocking
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - R Bezerra
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - M J R J Bouts
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - E C McIntosh
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - I Diwan
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - P Garg
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - A Chutinet
- Departments of Neurology (A.C., W.T.K., H.A., A.B.S.).,Department of Medicine (A.C.), Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - W T Kimberly
- Departments of Neurology (A.C., W.T.K., H.A., A.B.S.)
| | - W A Copen
- Radiology (W.A.C., P.W.S.), Massachusetts General Hospital, Boston, Massachusetts
| | - P W Schaefer
- Radiology (W.A.C., P.W.S.), Massachusetts General Hospital, Boston, Massachusetts
| | - H Ay
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts.,Departments of Neurology (A.C., W.T.K., H.A., A.B.S.)
| | - A B Singhal
- Departments of Neurology (A.C., W.T.K., H.A., A.B.S.)
| | - K Kamnitsas
- Department of Computing (K.K., B.G.), Imperial College London, London, UK
| | - B Glocker
- Department of Computing (K.K., B.G.), Imperial College London, London, UK
| | - A G Sorensen
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
| | - O Wu
- From the Department of Radiology (S.W., S.J.T.M., R.B., M.J.R.J.B., E.C.M., I.D., P.G., H.A., A.G.S., O.W.), Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts
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Lorizola I, Miyamoto J, Milanski M, Bezerra R, Rostagno M, Sumere B, Capitani C. SUN-LB257: Effect of Beetroot (BETAVULGARISL.) Stems and Leaves Supplementation on Glucose Metabolism in Mice Fed with a High-Fat Diet. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30600-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Alves A, Barros C, Gama A, Bezerra R, Mourão J, Rodrigues M. The Effect of White-rot Fungi on Jatropha curcas L. Pressed-seed Cake Detoxification on the Viscera of Chicks. J Comp Pathol 2013. [DOI: 10.1016/j.jcpa.2012.11.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fridman S, Bezerra R, Cagy M, Basile L, Piedade RA, Ribeiro P. [The effects of bromazepam on contingent negative variation and reaction time in a visuomotor task]. Rev Neurol 2006; 43:398-402. [PMID: 17006858] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
INTRODUCTION Bromazepam is the second most commonly used benzodiazepine in Brazil. Psychophysiological research on this substance is still in its early stages. AIM To determine the neurotoxicity of bromazepam by examining reaction times (RT) and contingent negative variations (CNV). SUBJECTS AND METHODS Using a videogame produced in our laboratory for psychophysiological research purposes (Car Acquisition), 14 healthy volunteers (9 males) aged between 23 and 42 drove a vehicle along a road full of curves (i.e. distractors) while they had to respond to imperative stimuli (i.e. orders to press the button on the joystick) that were preceded by warnings (S1-S2-RM paradigm with distractor). We compared RT, amplitudes and latencies of the CNV at each of the three electrodes on the median line (Fz, Cz and Pz) one hour after random, double-blind and crossed administration of placebo (P), 3 mg of bromazepam (B3) or 6 mg of bromazepam (B6) on different days. STATISTICS one-way ANOVA and Post Hoc Scheffé. RESULTS No significant differences were observed in the RT. At Pz, the CNV amplitudes displayed significant differences for P, B3 and B6 (p = 0.006), and also for B3 and B6 (p = 0.018), with B6 > B3 = P. At Fz, a non-significant tendency (p = 0.074) suggested a difference between the latencies, shorter in B6 than in B3 (p = 0.098), both equivalent to placebo. The mean amplitudes ranged between 2.4 and 5.9 microV. CONCLUSIONS Behavioural and neurophysiological neurotoxicity was insignificant one hour after administration of a single 3 or 6 mg dose of bromazepam in healthy young adults. Low mean amplitudes were compatible with the interference from distractors and did not result in floor effect.
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Affiliation(s)
- S Fridman
- Instituto de Psiquiatría, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil.
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de Souza SP, Bezerra R, Andrade L, Seguro AC. Combined therapy with dialysis and glucocorticoids in critically ill renal failure patients. Nephrol Dial Transplant 2006; 21:1996-8. [PMID: 16520346 DOI: 10.1093/ndt/gfl085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Sérgio Pinto de Souza
- Nephrology Department, University of São Paulo School of Medicine, São Paulo, São Paulo, Brazil
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Paula ACB, Gracioso JS, Toma W, Bezerra R, Saad MAJ, De Lucca IMS, Carneiro EM, Souza Brito ARM. Is gastric ulceration different in normal and malnourished rats? Br J Nutr 2005; 93:47-52. [PMID: 15705224 DOI: 10.1079/bjn20041291] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Protein malnutrition can adversely affect all tissues. The aim of the present study was to test the hypothesis that protein deprivation influences gastric ulcer formation, as well as metabolism and organ growth, in rats. In the present study, there was a significant reduction in the body and organ weight of rats fed a low-protein diet (P<0.001). Malnourished rats were less susceptible to ulceration of the gastric mucosa in ethanol and indomethacin models of acute gastric ulcers when compared with rats fed a normoproteic diet (17 % protein). Mucus production and prostaglandin E2 formation increased in malnourished rats, possibly explaining the lower number of acute ulcers in these animals. Pylorus ligature altered gastric juice composition (increased pH and gastric volume, and decreased total acid concentration) in the animal group fed a low-protein diet compared with the group fed a diet containing 17 % protein (P<0.05). The gastric mucosa was more damaged in malnourished rats than in normal rats evaluated for 14 d after acetic acid injection (P<0.001). Malnourished rats exhibited resistance to acute gastric lesions, owing to an increase in prostaglandin GE2 release and mucus secretion, which protected their gastric mucosa. This phenomenon was not seen in subchronic gastric ulceration.
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Affiliation(s)
- A C B Paula
- Department of Physiology and Biophysics, State University of Campinas, Campinas, Brazil
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Avila AS, Bezerra R, Mattos DM, Bernardo-Filho M. Drug interactions in radiopharmacy: A first mathematical approach. J Labelled Comp Radiopharm 2001. [DOI: 10.1002/jlcr.25804401291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
The in vivo incorporation of the photoactivable uridine analogue 4-thiouridine into the RNAs of an Escherichia coli K12 pyrD strain has been optimised. s4Urd uptake in RNAs appears to be strikingly dependent upon the age of the preculture, i.e. the number of generations the cells have undergone immediately before dilution in the thiolation medium. Conditions have been set up where efficient RNA thiolation occurs in cells growing exponentially at 50 to 70% the rate of the control. The substitution level s4U/U is maximal after growth for 9 to 10 generations in the thiolation medium and reaches 17 +/- 3% in tRNA and bulk RNA. Most of ribosomal derived ribonucleoproteins, 65 +/- 5%, sediment as 70S ribosomes (s4U/U = 7 +/- 2%) on a high Mg2+ sucrose gradient. The thiolated RNAs were characterized by their migration on a thiol-specific affinity electrophoretic gel.
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Affiliation(s)
- R Bezerra
- Institut Jacques Monod, C.N.R.S., Paris, France
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Hajnsdorf E, Dubreuil YL, Bezerra R, Favre A, Expert-Bezançon A. RNA protein crosslinks introduced into E. coli ribosomes by use of the intrinsic probe 4-thiouridine. Photochem Photobiol 1987; 45:445-51. [PMID: 3554280 DOI: 10.1111/j.1751-1097.1987.tb05401.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Favre A, Bezerra R, Hajnsdorf E, Lemaigre Dubreuil Y, Expert-Bezançon A. Substitution of uridine in vivo by the intrinsic photoactivable probe 4-thiouridine in Escherichia coli RNA. Its use for E. coli ribosome structural analysis. Eur J Biochem 1986; 160:441-9. [PMID: 2430798 DOI: 10.1111/j.1432-1033.1986.tb10060.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In vivo incorporation of the uridine-photoactivable analogue, 4-thiouridine, into the ribosomal RNA of an Escherichia coli pyrD strain has been demonstrated. It is highly dependent on the exogenous uridine and 4-thiouridine concentrations as well as on temperature. We have defined conditions allowing the substitution of 13 +/- 2% of the uridine residues in bulk RNA by 4-thiouridine. On a high-Mg2+ sucrose gradient, 33 +/- 3% of ribonucleic particles sediment as 70S ribosomes, the remaining being in the form of non-associated 50S and 30S particles containing immature rRNA. The thiolated 70S ribosomes tolerate a 4-5% substitution level (40 thiouridine molecules/particle). Surprisingly, 3-4% of ribosomal proteins, about two protein molecules/particle, were spontaneously covalently bound to 4-thiouridine-substituted rRNA. Specific 366-nm photoactivation increased this proportion to 10-12%, i.e. up to six or seven ribosomal protein molecules/particle. The photochemical cross-linking proceeds with apparent first-order kinetics with a quantum yield close to 5 X 10(-3). Although extensive photodynamic breakage of rRNA occurs under aerobic conditions, both the kinetics and yield of ribosomal protein cross-linking were independent of oxygenation conditions. The thiolated (4.5%) 70S ribosomes allowed the poly(U)-directed poly(Phe)synthesis at 48% the control rate. Photoactivation decreased this activity to 28% and 10% when performed under nitrogen and in aerated conditions, respectively.
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