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Ferreira MVM, Cavalcanti ÉFF, PM Rubini ND, Ferreira DC, Gonçalves LS, V Colombo AP. Oral status and periodontal microbiota of HIV-infected youth infected by vertical transmission. Future Virol 2018. [DOI: 10.2217/fvl-2018-0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: This study evaluated the oral status and microbiota of HIV+ youth infected by vertical transmission. Materials & methods: 34 HIV+ and 36 HIV- individuals (14–24 years of age) were examined for oral infections/lesions. Subgingival biofilm was collected and the microbiota determined by checkerboard DNA–DNA hybridization. Results: Over 90% of the HIV+ youth were under highly active antiretroviral therapy, but 64.6% had AIDS and 47% presented oral manifestations. HIV+ youth showed more periodontal attachment loss and inflammation than HIV- (p < 0.05), and also high prevalence of caries. Most species were detected in higher prevalence in the microbiota of HIV+ than controls. Conclusion: HIV+ youth infected by vertical transmission presented more periodontal destruction and inflammation, and greater prevalence of microbial pathogens compared with HIV- individuals.
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Affiliation(s)
- Mariana VM Ferreira
- School of Dentistry, Department of Clinics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Department of Medical Microbiology, Institute of Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Édila FF Cavalcanti
- School of Dentistry, Department of Clinics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Norma de PM Rubini
- Department of Allergy & Immunology, Gafrée e Guinle University Hospital, Federal University of the State of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Dennis C Ferreira
- School of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Lucio S Gonçalves
- School of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Ana Paula V Colombo
- Department of Medical Microbiology, Institute of Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Borges NA, Carmo FL, Stockler-Pinto MB, de Brito JS, Dolenga CJ, Ferreira DC, Nakao LS, Rosado A, Fouque D, Mafra D. Probiotic Supplementation in Chronic Kidney Disease: A Double-blind, Randomized, Placebo-controlled Trial. J Ren Nutr 2017; 28:28-36. [PMID: 28888762 DOI: 10.1053/j.jrn.2017.06.010] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 06/19/2017] [Accepted: 06/19/2017] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVE The objective of the study was to evaluate the effects of probiotic supplementation on the gut microbiota profile and inflammatory markers in chronic kidney disease patients undergoing maintenance hemodialysis (HD). DESIGN AND METHODS This was a randomized, double-blind, placebo-controlled study. Forty-six HD patients were assigned to receive 1 of 2 treatments: probiotic (n = 23; Streptococcus thermophilus, Lactobacillus acidophilus e Bifidobacterialongum, 90 billion colony-forming units per day) or placebo (n = 23) daily for 3 months. Blood and feces were collected at baseline and after intervention. The inflammatory markers (C-reactive protein and interleukin-6) were analyzed by immunoenzymatic assay (enzyme-linked immunosorbent assay). Uremic toxins plasma levels (indoxyl sulfate, p-cresyl sulfate, and indole-3-acetic acid) were obtained by Reversed-Phase High-Performance Liquid Chromatography. Routine laboratory parameters were measured by standard techniques. Fecal pH was measured by the colorimetric method, and the gut microbiota profile was assessed by Denaturing Gradient Gel Electrophoresis analysis. RESULTS Sixteen patients remained in the probiotic group (11 men, 53.6 ± 11.0 year old, 25.3 ± 4.6 kg/m2) and 17 in the placebo group (10 men, 50.3 ± 8.5 year old, 25.2 ± 5.7 kg/m2). After probiotic supplementation there was a significant increase in serum urea (from 149.6 ± 34.2 mg/dL to 172.6 ± 45.0 mg/dL, P = .02), potassium (from 4.4 ± 0.4 mmol/L to 4.8 ± 0.4 mmol/L, P = .02), and indoxyl sulfate (from 31.2 ± 15.9 to 36.5 ± 15.0 mg/dL, P = .02). The fecal pH was reduced from 7.2 ± 0.8 to 6.5 ± 0.5 (P = .01). These parameters did not change significantly in placebo group. Changes in the percentage delta (Δ) between groups were exhibited with no statistical differences observed. The inflammatory markers and gut profile were not altered by supplementation. CONCLUSIONS Aprobiotic supplementation failed to reduce uremic toxins and inflammatory markers. Therefore, probiotic therapy should be chosen with caution in HD patients. Further studies addressing probiotic therapy in chronic kidney disease patients are needed.
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Affiliation(s)
- Natália A Borges
- Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil; Medical Sciences Graduate Program, Federal University Fluminense (UFF), Niterói-RJ, Brazil.
| | - Flávia L Carmo
- Institute of Microbiology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Milena B Stockler-Pinto
- Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil
| | - Jessyca S de Brito
- Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil
| | - Carla J Dolenga
- Basic Pathology Department, Federal University of Paraná (UFPR), Curitiba-PR, Brazil
| | - Dennis C Ferreira
- Faculty of Dentistry, Veiga de Almeida University, Rio de Janeiro, Brazil
| | - Lia S Nakao
- Basic Pathology Department, Federal University of Paraná (UFPR), Curitiba-PR, Brazil
| | - Alexandre Rosado
- Institute of Microbiology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Denis Fouque
- Department of Nephrology, Centre Hospitalier Lyon Sud, Univ Lyon, UCBL, Inserm Carmen, CENS, F-69622 Lyon, France
| | - Denise Mafra
- Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil; Medical Sciences Graduate Program, Federal University Fluminense (UFF), Niterói-RJ, Brazil
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Marieiro LMB, Deluiz D, Ferreira DC, Tannure PN. Measurement of Distance Between the Mental Foramina using ConeBeam Computed Tomography: A Pilot Study with a Possible Method for Planning Mandibular Implants. Pesqui bras odontopediatria clín integr 2017. [DOI: 10.4034/pboci.2017.171.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Barros AF, Borges NA, Ferreira DC, Carmo FL, Rosado AS, Fouque D, Mafra D. Is there interaction between gut microbial profile and cardiovascular risk in chronic kidney disease patients? Future Microbiol 2016; 10:517-26. [PMID: 25865191 DOI: 10.2217/fmb.14.140] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
AIM To evaluate the gut microbial profile in chronic kidney disease (CKD) patients and evaluate the possible relationship with inflammation and cardiovascular risk. PATIENTS & METHODS Markers inflammation plasma and bacterial community profile (denaturing gradient gel electrophoresis) were analyzed. RESULTS The average number of bands was not different in healthy individuals and CKD patients. The number of bands was negatively associated with plasma levels of VCAM-1 in patients. Flavobacteriaceae bacterium and Listeria monocytogenes were found in patients and Lachnospiraceae bacterium and Butyrivibrio crossotus in healthy individuals. CONCLUSION Although CKD patients did not present altered gut microbial profile, the sequencing of bands suggested a different microbiota between groups. The result suggests a possible relationship between gut microbiota and cardiovascular risk in CKD patients.
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Affiliation(s)
- Amanda F Barros
- Cardiovascular Sciences Graduate Program, Federal University Fluminense (UFF), Niterói-RJ, Brazil
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Ferreira DC, Gonçalves LS, Siqueira JF, Carmo FL, Santos HF, Feres M, Figueiredo LC, Soares GM, Rosado AS, dos Santos KRN, Colombo APV. Subgingival bacterial community profiles in HIV-infected Brazilian adults with chronic periodontitis. J Periodontal Res 2015; 51:95-102. [PMID: 26040412 DOI: 10.1111/jre.12287] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2015] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND OBJECTIVE To compare the subgingival microbial diversity between non-HIV-infected and HIV-infected individuals with chronic periodontitis using denaturing gradient gel electrophoresis (DGGE). MATERIAL AND METHODS Thirty-two patients were selected: 11 were HIV-infected and 21 were non-HIV-infected, and all had chronic periodontitis. Periodontal measurements included probing depth, clinical attachment level, visible supragingival biofilm and bleeding on probing. Subgingival biofilm samples were collected from periodontal sites (50% with probing depth ≤ 4 mm and 50% with probing depth ≥ 5 mm) and whole-genomic-amplified DNA was obtained. The DNA samples were subjected to amplification of a 16S rRNA gene fragment using universal bacterial primers, followed by DGGE analysis of the amplified gene sequences. RESULTS The non-HIV-infected group presented higher mean full-mouth visible supragingival biofilm (p = 0.004), bleeding on probing (p = 0.006), probing depth (p < 0.001) and clinical attachment level (p = 0.001) in comparison with the HIV-infected group. DGGE analysis revealed 81 distinct bands from all 33 individuals. Banding profiles revealed a higher diversity of the bacterial communities in the subgingival biofilm of HIV-infected patients with chronic periodontitis. Moreover, cluster and principal component analyses demonstrated that the bacterial community profiles differed between these two conditions. High interindividual and intra-individual variability in banding profiles were observed for both groups. CONCLUSION HIV-infected patients with chronic periodontitis present greater subgingival microbial diversity. In addition, the bacterial communities associated with HIV-infected and non-HIV-infected individuals are different in structure.
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Affiliation(s)
- D C Ferreira
- Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Brazil
| | - L S Gonçalves
- Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Brazil
| | - J F Siqueira
- Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Brazil
| | - F L Carmo
- Institute of Microbiology Prof. Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - H F Santos
- Institute of Microbiology Prof. Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - M Feres
- Dental Research Division, Department of Periodontology, Guarulhos University, Guarulhos, Brazil
| | - L C Figueiredo
- Dental Research Division, Department of Periodontology, Guarulhos University, Guarulhos, Brazil
| | - G M Soares
- Dental Research Division, Department of Periodontology, Guarulhos University, Guarulhos, Brazil
| | - A S Rosado
- Institute of Microbiology Prof. Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - K R N dos Santos
- Institute of Microbiology Prof. Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - A P V Colombo
- Institute of Microbiology Prof. Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Cavalcante FS, Abad ED, Lyra YC, Saintive SB, Ribeiro M, Ferreira DC, Santos KRND. High prevalence of methicillin resistance and PVL genes among Staphylococcus aureus isolates from the nares and skin lesions of pediatric patients with atopic dermatitis. ACTA ACUST UNITED AC 2015; 48:588-94. [PMID: 25992644 PMCID: PMC4512096 DOI: 10.1590/1414-431x20154221] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 01/13/2015] [Indexed: 11/22/2022]
Abstract
Staphylococcus aureus is highly prevalent among patients with atopic
dermatitis (AD), and this pathogen may trigger and aggravate AD lesions. The aim of
this study was to determine the prevalence of S. aureus in the nares
of pediatric subjects and verify the phenotypic and molecular characteristics of the
isolates in pediatric patients with AD. Isolates were tested for antimicrobial
susceptibility, SCCmectyping, and Panton-Valentine Leukocidin (PVL)
genes. Lineages were determined by pulsed-field gel electrophoresis and multilocus
sequence typing (MLST). AD severity was assessed with the Scoring Atopic Dermatitis
(SCORAD) index. Among 106 patients, 90 (85%) presented S. aureus
isolates in their nares, and 8 also presented the pathogen in their skin infections.
Two patients had two positive lesions, making a total of 10 S.
aureusisolates from skin infections. Methicillin-resistant S.
aureus(MRSA) was detected in 24 (26.6%) patients, and PVL genes were
identified in 21 (23.3%), including 6 (75%) of the 8 patients with skin lesions but
mainly in patients with severe and moderate SCORAD values (P=0.0095). All 24 MRSA
isolates were susceptible to trimethoprim/sulfamethoxazole, while 8 isolates had a
minimum inhibitory concentration (MIC) to mupirocin >1024 μg/mL. High lineage
diversity was found among the isolates including USA1100/ST30, USA400/ST1,
USA800/ST5, ST83, ST188, ST718, ST1635, and ST2791. There was a high prevalence of
MRSA and PVL genes among the isolates recovered in this study. PVL genes were found
mostly among patients with severe and moderate SCORAD values. These findings can help
clinicians improve the therapies and strategies for the management of pediatric
patients with AD.
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Affiliation(s)
- F S Cavalcante
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - E D Abad
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Y C Lyra
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - S B Saintive
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - M Ribeiro
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - D C Ferreira
- Centre for Ecological and Evolutionary Studies (Microbial Ecology), Faculty of Mathematics and Natural Science, University of Groningen, Groningen, The Netherlands
| | - K R N dos Santos
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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Bezerra TM, Ferreira DC, Carmo FL, Pinheiro R, Leite DCA, Cavalcante FS, Belinho RA, Peixoto RS, Rosado AS, dos Santos KRN, Castro GFBA. Herpesvirus in the oral cavity of children with leukaemia and its impact on the oral bacterial community profile. J Clin Pathol 2015; 68:222-8. [DOI: 10.1136/jclinpath-2014-202668] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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de Matos PDM, Sedaca S, Ferreira DC, Iorio NL, Toledo VCS, Freitas AIC, Coelho FL, Sousa C, Dos Santos KRN, Pereira MO. Antimicrobial synergism against different lineages of methicillin-resistant Staphylococcus aureus carrying SCCmec IV. J Appl Microbiol 2014; 116:1418-26. [PMID: 24524649 DOI: 10.1111/jam.12472] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/04/2014] [Accepted: 02/07/2014] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the synergistic activity of antimicrobial drugs against lineages of methicillin-resistant Staphylococcus aureus (MRSA) carrying SCCmec IV. The biofilm production and related genes were also detected. METHODS AND RESULTS Forty two MRSA isolates were tested for biofilm production and related genes. Biofilm/biomass susceptibility to gentamicin (G), linezolid (L), rifampicin (R) and vancomycin (V) was determined for six isolates from three lineages prevalent in Rio de Janeiro hospitals in concentrations ranging from 0·25 to 64 μg ml(-1). Biomass was evaluated by microtitre plate test and number of viable cells (CFU cm(-2)) and inspected by epifluorescence microscopy. All isolates presented the icaA and sasG genes, but only 38% were biofilm producers. There were 50 and 45% biomass reductions when concentrations ≥4 μg ml(-1) of R or L and ≥16 μg ml(-1) of G or V, respectively, were used. Synergism tests produced a 55% biomass reduction with R(2μgml-1) + G(16μgml-1), R(2μgml-1) + L(2μgml-1), R(2μgml-1) + V(4μgml-1), and L(2μgml-1) + V(4μgml-1). Number of viable cells was reduced from 2 to 3 logs with R(2μgml-1) + L(2μgml-1) and R(2μgml-1) + V(4μgml-1). CONCLUSIONS Synergisms involving R plus L and R plus V caused important reductions in biofilm/biomass and the number of viable cells. Drug combinations should be considered in the chemotherapies of MRSA-SCCmec IV infections. SIGNIFICANCE AND IMPACT OF THE STUDY Biofilms in MRSA infections restrict the clinical choice of antimicrobials. Thus, knowledge of the best options for monotherapy and drug synergisms could improve clinical results.
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Affiliation(s)
- P D M de Matos
- Department of Medical Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Nova Friburgo, Rio de Janeiro, Brazil
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Cavalcante FS, Schuenck RP, Ferreira DC, da Costa CR, Nouér SA, dos Santos KRN. Meticillin-resistant Staphylococcus aureus: spread of specific lineages among patients in different wards at a Brazilian teaching hospital. J Hosp Infect 2013; 86:151-4. [PMID: 24433925 DOI: 10.1016/j.jhin.2013.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 12/04/2013] [Indexed: 11/17/2022]
Abstract
This study aimed to characterize meticillin-resistant Staphylococcus aureus (MRSA) lineages circulating in a Brazilian teaching hospital. MRSA isolates from nasal swabs were evaluated to assess antimicrobial susceptibility, staphylococcal cassette chromosome mec (SCCmec), Panton-Valentine leucocidin status, pulsed-field gel electrophoresis profile and multi-locus sequence type (MLST) analysis. Eighty-three MRSA isolates were analysed. SCCmec III (43.4%) and IV (49.4%) were predominant. ST1-IV (USA400) was more common in internal medicine (P = 0.002) whereas 'clone M' (SCCmec III) was more common in the medical and surgical intensive care unit (P = 0.004), and all isolates were ST5-IV (USA800) in dermatology (P < 0.001). These data improved the understanding of the MRSA epidemiology inside the hospital and helped to establish effective control measures.
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Affiliation(s)
- F S Cavalcante
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - R P Schuenck
- Departamento de Patologia, Universidade Federal do Espirito Santo, Espirito Santo, Brazil
| | - D C Ferreira
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - C R da Costa
- Hospital Universitário Clementino Fraga Filho e Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - S A Nouér
- Hospital Universitário Clementino Fraga Filho e Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - K R N dos Santos
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
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Ferreira DC, Nogueira G, Cancio VA, Cavalcante FS, Godefroy P, Sousa DSC, Hespanhol W, dos Santos KRN, Cavalcante MAB. Loss of lingual sensitivity and slightly increased size signaling schwannoma in a patient with mixed conjunctive tissue disease. Spec Care Dentist 2013; 33:301-3. [PMID: 24164229 DOI: 10.1111/j.1754-4505.2012.00308.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The purpose of this study was to describe an unusual case of a lingual schwannoma associated with a mixed connective tissue disease (MCTD). A case report. A lingual schwannoma with loss of lingual sensitivity and slightly increased size in an 18-year-old patient with MCTD was correctly diagnosed through a biopsy and no reoccurrence was observed one year after the surgical removal of the tumor and sensitivity returned 3 months after surgery. This case was considered uncommon, making the clinical diagnosis challenging in view of the diversity of possibilities for its differential diagnosis, thus showing the importance of a biopsy to confirm the diagnosis and long term follow up in such cases.
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Affiliation(s)
- D C Ferreira
- Laboratório de Infecção hospitalar - IMPPG - UFRJ
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Ferreira DC, Abreu IM, Honório J, Sampaio PN, Binello F, Bastos D, Pierre J, Carvalho IH, Alves U, Bosiger A, Filho PMSP, Silva DH, Neto OS. Acute aortic dissection in pregnancy management with the fetus remaining in situ. J Cardiothorac Surg 2013. [PMCID: PMC3844844 DOI: 10.1186/1749-8090-8-s1-o255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abreu LM, Alves MLM, Honório J, Ferreira DC, Sampaio PN, Bastos D, Bosiger A, Godoy S, Ferreira DC, Neto OS. Video-assisted surgery via periareolar, mitral valve replacement and papillary muscle relocation with neochordae of PTFE. J Cardiothorac Surg 2013. [PMCID: PMC3844747 DOI: 10.1186/1749-8090-8-s1-p144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Damasco PV, Cavalcante FS, Chamon RC, Ferreira DC, Rioja SS, Potsch MV, Pastura MP, Marques VD, Castier MB, Marques EA, Santos KRN. The first case report of non-nosocomial healthcare-associated infective endocarditis due to methicillin-resistant Staphylococcus aureus USA400 in Rio de Janeiro, Brazil. Infection 2013; 41:851-4. [PMID: 23456477 DOI: 10.1007/s15010-013-0430-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 02/12/2013] [Indexed: 11/26/2022]
Abstract
Staphylococcus aureus is the main causal pathogen of infective endocarditis (IE), which may have distinct origins, namely, community, nosocomial, or non-nosocomial healthcare-associated (NNHCA). We report the first case of NNHCA-IE caused by methicillin-resistant S. aureus strain USA400/SCCmec IV in which the combination therapy of rifampin and vancomycin had a favorable outcome for the patient.
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Affiliation(s)
- P V Damasco
- Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
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Paiva SS, Siqueira JF, Rôças IN, Carmo FL, Ferreira DC, Curvelo JAR, Soares RM, Rosado AS. Supplementing the Antimicrobial Effects of Chemomechanical Debridement with Either Passive Ultrasonic Irrigation or a Final Rinse with Chlorhexidine: A Clinical Study. J Endod 2012; 38:1202-6. [DOI: 10.1016/j.joen.2012.06.023] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 06/15/2012] [Accepted: 06/20/2012] [Indexed: 02/02/2023]
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de Paula VA, Ferreira DC, Carmo FL, Rosardio AS, Dos Santos KR, Maia LC, Primo LG. Short communication: polymicrobial community in teeth associated with severe early-childhood caries. Eur Arch Paediatr Dent 2011; 12:264-6. [PMID: 21993067 DOI: 10.1007/bf03262819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM This was to characterise the microbial diversity in the complex dental plaque of children with severe early-childhood caries (S-ECC), using the denaturing gel gradient electrophoresis (DGGE) technique. METHODS The DGGE technique was used as a diagnostic tool to analyse samples from the oral cavity of a patient with S-ECC. Dental plaque samples from a 3-year-old child with S-ECC were taken from the primary central maxillary incisor (biofilm on vestibular surface), primary maxillary molar (biofilm on vestibular surface), primary central maxillary incisor (dentine), primary maxillary molar (dentine) and saliva and then analysed by PCR-DGGE. RESULTS Three bands occurred in all samples, moreover, 86% of similarity was observed in the pattern of bands between incisor and molar teeth biofilm samples, including four similar bands. CONCLUSION DGGE is a valuable tool for differentiating the microbial composition of the oral plaque in S-ECC children.
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Affiliation(s)
- V A de Paula
- Dept. Paediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Brazil.
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Guilherme BPS, Ferreira DC, Rôças IN, Provenzano JC, Santos KRN, Siqueira JF. Herpesvirus carriage in saliva and posttreatment apical periodontitis: searching for association. ACTA ACUST UNITED AC 2011; 112:678-83. [PMID: 21831677 DOI: 10.1016/j.tripleo.2011.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Accepted: 05/01/2011] [Indexed: 10/17/2022]
Abstract
OBJECTIVE Herpesvirus infection can cause immunosuppression and then act as a modifier of apical periodontitis, influencing the disease severity and response to treatment. The purpose of this study was to investigate if herpesvirus infection, as inferred by salivary carriage, may influence the endodontic treatment outcome. STUDY DESIGN The study population included 72 patients who had root canals treated more than 1 year previously because of necrotic pulps and apical periodontitis. At the follow-up examination, 27 of these patients presented with posttreatment apical periodontitis (failure) and 45 individuals exhibited healed/healing periradicular tissues (success). Saliva was collected from these individuals, DNA was extracted, subjected to multiple displacement amplification, and screened by polymerase chain reaction (PCR) assays for the presence of 6 herpesviruses: herpes simplex virus types 1 and 2 (HSV-1/2), Epstein-Barr virus (EBV), human cytomegalovirus (HCMV), human herpesvirus-6 (HHV-6), and human herpesvirus-8 (HHV-8). RESULTS Except for HSV-1/2, all other herpesviruses were detected in saliva from both healed/healing and diseased groups. HHV-8 was the most frequent herpesvirus found in saliva (84% in success, 89% in failure), followed by HCMV (22% in success, 30% in failure), EBV (16% in success, 18.5% in failure) and HHV-6 (7% in success, 15% in failure). No significant association of herpesvirus carriage in saliva with poor treatment outcome was discernible in the population studied (P > .05). CONCLUSIONS Data from the present study suggest that herpesvirus infection may not influence the outcome of endodontic treatment. Further longitudinal studies are warranted to confirm these findings.
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Affiliation(s)
- Bianca P S Guilherme
- Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
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Ferreira DC, Rôças IN, Paiva SS, Carmo FL, Cavalcante FS, Rosado AS, Santos KR, Siqueira JF. Viral-bacterial associations in acute apical abscesses. ACTA ACUST UNITED AC 2011; 112:264-71. [DOI: 10.1016/j.tripleo.2011.01.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 01/21/2011] [Accepted: 01/22/2011] [Indexed: 01/30/2023]
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Ferreira DC, Paiva SSM, Carmo FL, Rôças IN, Rosado AS, Santos KRN, Siqueira JF. Identification of herpesviruses types 1 to 8 and human papillomavirus in acute apical abscesses. J Endod 2010; 37:10-6. [PMID: 21146068 DOI: 10.1016/j.joen.2010.09.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2010] [Revised: 08/29/2010] [Accepted: 09/19/2010] [Indexed: 12/31/2022]
Abstract
INTRODUCTION It has been suggested that viruses, especially herpesviruses, can play a role in the pathogenesis of marginal and apical periodontitis. This study aimed to detect herpesviruses types 1 to 8, namely herpes simplex virus (HSV-1/2), varicella zoster virus (VZV), Epstein-Barr virus (EBV), human cytomegalovirus (HCMV), human herpesvirus-6 (HHV-6), human herpesvirus-7 (HHV-7), and human herpesvirus-8 (HHV-8) as well as human papillomavirus (HPV) in acute apical abscesses. METHODS Twenty-four samples were taken by aspiration of the purulent exudate from acute apical abscesses. DNA extracted from clinical samples served as a template in single or nested polymerase chain reaction (PCR) assays for the detection of the target viruses. RESULTS Control PCR reactions with β-globin gene primers revealed that all samples but one had detectable human DNA. Of the 23 abscess samples positive for the β-globin gene, 14 (61%) were positive for at least one of the target human viruses. Thirteen (56.5%) cases had herpesvirus: HHV-8 occurred in 11 (48%), VZV and HHV-6B in two (9%), and HHV-7 and HSV-1/2 in one (4%). EBV and HCMV were not present in any of the examined samples. HPV was detected in three (13%) abscess samples. Viral coinfection was found in five cases, with one case harboring three of the targeted viruses. CONCLUSION A large number of abscess samples were positive for at least one target virus. Unexpectedly, HHV-8 was for the first time detected and in a high prevalence. Papillomavirus and other herpesviruses were also found for the first time in endodontic abscesses. Although these findings suggest an association, the specific role of viruses in the pathogenesis of acute apical abscesses awaits further clarification.
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Affiliation(s)
- Dennis C Ferreira
- Institute of Microbiology Prof Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Ferreira DC, Oliveira C, Foresti F. Chromosome mapping of retrotransposable elements Rex1 and Rex3 in three fish species in the subfamily Hypoptopomatinae (Teleostei, Siluriformes, Loricariidae). Cytogenet Genome Res 2010; 132:64-70. [PMID: 20798486 DOI: 10.1159/000319620] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2010] [Indexed: 11/19/2022] Open
Abstract
Transposons and retrotransposons represent a great portion of the eukaryotic genome. These repeated elements can be defined as genetic entities capable of self-inserting into different positions within the genome modifying the functions of the genes with which they are associated. The purpose of the present work was to isolate, identify, and map the sequences of Rex1 and Rex3 transposable elements present in the genomes of fishes of the family Loricariidae. The retrotransposable elements were identified through amplification with Rex1 and Rex3 primers, and the nucleotide composition of the retrotransposons was determined by automatic sequencing. In all the species analyzed it was possible to isolate Rex1 partial sequences from 520 to 563 bp in size and Rex3 partial sequences from 407 to 454 bp in size. Comparisons with the available literature showed that Loricariidae retrotransposons Rex1 and Rex3 have a high sequence similarity to putative homologous genes in different fish orders. Fluorescence in situ hybridization experiments conducted in 3 species, Hisonotus leucofrenatus, Pseudotocinclus tietensis, and Parotocinclus maculicauda, using the retrotransposable elements isolated for each species as probes, revealed that Rex1 and Rex3 share a similar dispersion pattern and are both found on all chromosomes of the 3 species organized in small clusters and dispersed on all the chromosomes, including euchromatic and heterochromatic regions, although a larger concentration was observed in the heterochromatic regions of H. leucofrenatus. The data found in the present study contradict much of the literature that substantiates that the retrotranspon elements are preferentially accumulated in the heterochromatin regions in fishes.
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Affiliation(s)
- D C Ferreira
- Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, Brazil.
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20
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Abstract
Solid lipid nanoparticles (SLN) composed of trimyristin (solid lipid) and poloxamer 407 (surfactant) were prepared by a w/o/w emulsion technique for the incorporation of Salmon calcitonin, and further explored as protein carriers for oral delivery. Trimyristin SLN showed a mean size diameter of 200 nm with an association efficiency for calcitonin of approx. 86%. The morphology of SLN was investigated by cryo-SEM and by AFM, revealing spheroid shape SLN with a smooth surface. The in vitro release of calcitonin occurred for a period of 8 h, under both gastric and intestinal simulated pH conditions, predicting suitable properties for oral administration. The pharmacological activity of the protein was evaluated following oral dosage of calcitonin-loaded SLN in rats. SLN lowered the basal blood calcium levels by up to 20% with 500 IU/kg dose sustaining hypocalcaemia over 8 h. The results indicate that incorporation of Salmon calcitonin into trimyristin SLN is a key factor for the improvement of the efficiency of such carriers for oral delivery of proteins.
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Affiliation(s)
- S Martins
- Faculty of Pharmacy, University of Porto, Rua Aníbal Cunha 164, 4050-030 Porto, Portugal
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Silva AC, Santos D, Ferreira DC, Souto EB. Minoxidil-loaded nanostructured lipid carriers (NLC): characterization and rheological behaviour of topical formulations. Pharmazie 2009; 64:177-182. [PMID: 19348340] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Lipid nanoparticles are used as biocompatible carriers for several types of drugs intended for pharmaceutical, cosmetic, and biochemical purposes. The wide range of lipids and surfactants available for the production of such particles turns these carriers highly suitable for distinct applications (topical, dermal and transdermal, parenteral, pulmonary, and oral administration). This work describes the development of a special type of lipid particles, namely nanostructured lipid carriers (NLC), for minoxidil as an alternative to conventional topical alcoholic solutions. NLC were composed of stearic acid and oleic acid, being the matrix stabilized with poloxamer 188 in aqueous dispersion. To develop a suitable topical formulation, lipid dispersions were further mixed with freshly prepared Carbopol or perfluorocarbon based hydrogels. Minoxidil-loaded NLC were approximately 250 nm in size before the entrapment within the gel network and remained below 500 nm after mixing with both types of hydrogels. The occurrence of minoxidil crystallization in the aqueous phase of lipid dispersions was discarded under analysis by light microscopy and by scanning electron microscopy. Differential scanning calorimetry was used to assess the recrystallization index (i.e. measure of the percentage of lipid matrix that is crystallized) of the particles, which was shown to be 62% for minoxidil-free dispersions and 68% for minoxidil-loaded NLC dispersions. Rheological analysis of hydrogels containing NLC dispersions showed typical pseudoplastic behaviour which makes them suitable for topical purposes.
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Affiliation(s)
- A C Silva
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Porto University, Portugal
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Passos MRL, Ferreira DC, Arze WNC, Silva JCS, Passos FDL, Curvelo JAR. Penile myiasis as a differential diagnosis for genital ulcer: a case report. Braz J Infect Dis 2009; 12:155-7. [PMID: 18641855 DOI: 10.1590/s1413-86702008000200012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2008] [Indexed: 11/22/2022] Open
Abstract
The genital localized myiasis is a rare zooparasitic dermatosis. This case reported to a penile myiasis by Dermatobia hominis larvae in a 62 year-old man, who is a retired military official from São Gonçalo city, Rio de Janeiro state, Brazil. This patient was guided to the sexually transmitted diseases (STD) clinic from Universidade Federal Fluminense (UFF) by professionals from a urology outpatient clinic of a public hospital from Rio de Janeiro state. The exam showed a 2 cm diameter nodular lesion with a hyperemic area in the glands penis that had arisen 20 days before the exam. It evolved in a favorable way after larvae removal, through previous local anesthesia and slight pressure in lesion's base with the extraction of the larvae. Penile myiasis is not a very frequent situation, although it must be considered as an option in differential diagnosis of genital infectious diseases, even among people of low economical level, as in the case presented.
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Affiliation(s)
- Mauro R L Passos
- Department of Microbiology, Fluminense Federal University, Niterói, RJ, Brazil
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Sarmento B, Ribeiro AJ, Veiga F, Ferreira DC, Neufeld RJ. Insulin-loaded nanoparticles are prepared by alginate ionotropic pre-gelation followed by chitosan polyelectrolyte complexation. J Nanosci Nanotechnol 2007; 7:2833-41. [PMID: 17685304 DOI: 10.1166/jnn.2007.609] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Alginate nanoparticles were prepared from dilute alginate sol by inducing a pre-gel with calcium counter ions, followed by polyelectrolyte complex coating with chitosan. Particles in the nanometer size range were obtained with 0.05% alginate and 0.9 mM Ca2+. The mean particle size was influenced by time and stirring speed of nanoparticle preparation, by alginate guluronic acid content and chitosan molecular weight and by the initial alginate:chitosan mass ratio. The association efficiency of insulin into alginate nanoparticles, as well as loading capacity were mainly influenced by the alginate:chitosan mass ratio. Under optimized size conditions, the association efficiency and loading capacities were as high as 92% and 14.3%, respectively. Approximately 50% of the protein was partially retained by the nanoparticles in gastric pH environment up to 24 hours while a more extensive release close to 75% was observed under intestinal pH conditions. Mild formulation conditions, optimum particle size range obtained, high insulin entrapment efficiency, and resistance to gastrointestinal release seem to be synergic and promising factors toward development of an oral insulin delivery form.
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Affiliation(s)
- B Sarmento
- Department of Pharmaceutical Technology, Faculty of Pharmacy of the University of Porto, Porto, Portugal
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Sarmento B, Ferreira DC, Jorgensen L, van de Weert M. Probing insulin's secondary structure after entrapment into alginate/chitosan nanoparticles. Eur J Pharm Biopharm 2006; 65:10-7. [PMID: 17101268 DOI: 10.1016/j.ejpb.2006.09.005] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Revised: 09/13/2006] [Accepted: 09/18/2006] [Indexed: 11/21/2022]
Abstract
The aim of the present study was to probe the structural integrity of insulin after being entrapped into chitosan/alginate nanoparticles produced by ionotropic polyelectrolyte pre-gelation. By manipulating the alginate:chitosan mass ratio and the pH during nanoparticle production, desired nanoparticles with a mean size of 850 (+/-88)nm and insulin association efficiency of 81 (+/-2)% were obtained. Insulin secondary structure was assessed by Fourier transform infrared (FTIR) and circular dichroism (CD) after entrapment into nanoparticles and after release from the particles under gastrointestinal simulated conditions. FTIR second-derivative spectra and area-overlap compared to an insulin standard confirmed that no significant conformational changes of insulin occurred in terms of alpha-helix and beta-sheet content. Far-UV-CD spectra corroborated the preservation of insulin structure during the nanoparticle production procedure. The presented nanoparticulate system is a promising carrier for insulin oral delivery since it preserves insulin structure and therefore also, potentially, its bioactivity.
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Affiliation(s)
- B Sarmento
- Department of Pharmaceutical Technology, Faculty of Pharmacy of the University of Porto, Porto, Portugal.
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Ferreira CR, Magalhães DR, Ferreira DC, Hanan MZ, Camargos AF. Quinacrine female nonsurgical sterilization (QS): endometrial assessment by vaginal ultrasonography in 128 women. Int J Gynaecol Obstet 2003; 83 Suppl 2:S59-66. [PMID: 14763187] [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: 04/28/2023]
Abstract
OBJECTIVE Investigate effectiveness, safety and endometrial pattern after QS. METHOD This study began in March 1999 and ended March 18, 2003; 128 women received transcervical insertions of quinacrine. Follow-up visits with ultrasound were scheduled at 1, 3, 6, 12-month intervals. RESULTS Two pregnancies occurred, one at 25 months, the other at 37. Adverse events (AE) were: yellow vaginal discharge, headache, mild abdominal pain, vaginal pruritus, nausea and transient decrease in endometrial thickness. One patient had allergic reaction. A third insertion was done in case of vaginal bleeding (16.4%). One year after QS 10% still had amenorrhea, which may be the result of the fact that 73% of our patients had received DMPH. Once inside the uterus, the dissolved quinacrine could be seen within seconds, via ultrasound as a "Lake of Quinacrine" which stays for up to two hours. Frequently, a transverse vaginal ultrasonographic view of the uterine cavity showed plug-like echogenic points at the cornua. CONCLUSION Quinacrine sterilization is safe and effective. The echogenic points need to be more thoroughly studied in order to affirm whether ultrasonography may identify the blockage of the tubes. Since early pregnancy is due to imperfect tubal closure, the use of ultrasound may prevent failure. However, pregnancy due to later recanalization cannot be avoided.
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Affiliation(s)
- C R Ferreira
- Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Belo Horizonte, Brazil.
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Amaral MH, Lobo JM, Ferreira DC. Naproxen availability from variable-dose and weight sustained-release tablets. Drug Dev Ind Pharm 2001; 27:221-5. [PMID: 11291202 DOI: 10.1081/ddc-100000240] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this work was to compare the naproxen availability from hydroxypropyl methylcellulose (HPMC) matrix tablets containing the same dose and a 2-fold weight variation (160 mg of naproxen in tablets weighting 250 and 500 mg) or with the same weight and a 2-fold dose variation (500 mg of weight and 160 or 320 mg of naproxen). The 2-fold weight variation in tablets with the same dose and also the 2-fold dose variation in tablets with the same weight did not affect the naproxen release. In addition, the release rate of two tablets of the same formulation and one tablet with a 2-fold dose and weight variation was not significantly different at the first minutes of the dissolution assay.
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Affiliation(s)
- M H Amaral
- Centro de Tecnologia do Medicamento, Faculty of Pharmacy of OPorto, Rua Aníbal Cunha, 164, 4050-Porto, Portugal
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Amaral MH, Lobo JM, Ferreira DC. Effect of hydroxypropyl methylcellulose and hydrogenated castor oil on naproxen release from sustained-release tablets. AAPS PharmSciTech 2001; 2:E6. [PMID: 14727881 PMCID: PMC2750472 DOI: 10.1208/pt020206] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 11/30/2022] Open
Abstract
The effect of the concentration of hydrophilic (hydroxypropyl methylcellulose [HPMC]) and hydrophobic (hydrogenated castor oil [HCO]) products, fillers (lactose and dibasic calcium phosphate), and buffers (sodium bicarbonate, calcium carbonate, and sodium citrate) on naproxen release rate was studied. Matrix tablets were prepared by double compression, and in vitro dissolution tests were performed. The dissolution results showed that an increased amount of HPMC or hydrogenated castor oil resulted in reduced drug release. The inclusion of buffers in the HPMC matrix tablets enhanced naproxen release. For HCO tablets, only sodium bicarbonate enhanced naproxen release. The presence of lactose on HPMC matrix tablets did not show a significantly different result from that obtained with the formulation containing dibasic calcium phosphate as a filler. However, for the tablets containing HCO, the presence of lactose significantly enhanced the naproxen release rate. The matrix-forming materials in this study were suitable for use in sustained-release tablets containing naproxen. The drug release can be modulated by adding suitable amounts of diluents and buffers.
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Affiliation(s)
- M H Amaral
- Centro de Tecnologia do Medicamento, Faculty of Pharmacy, University of Oporto, Rua Aníbal Cunha, 164, 4050-Porto, Portugal.
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Wells JL, Ferreira DC. Guidelines for the Department of Transportation physical examination. Nurse Pract 1999; 24:78, 81, 88-92 passim. [PMID: 10349671] [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: 02/12/2023]
Abstract
Primary care providers commonly perform the mandatory Department of Transportation Federal Highway Administration physical examination for individuals who drive commercial motor vehicles. Although these examinations may be offered at the worksite or in occupational health clinics, many drivers prefer to have them performed in the primary care setting. Performing the examination and subsequently certifying the driver is a highly regulated process with potentially serious consequences for the driver, the examiner, and the public. This article discusses the regulations and recommendations for certification of commercial drivers and the problems commonly encountered in the clinical setting.
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Affiliation(s)
- J L Wells
- University of Massachusetts Lowell, USA
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Sequeira JF, Madruga IM, Ribeiro M, Duarte PC, Ferreira DC, Sarmento JL. [The cardiac toxicity of cancer chemotherapy]. ACTA MEDICA PORT 1994; 7:311-8. [PMID: 8073908] [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: 01/28/2023]
Abstract
The presence of secondary effects following the administration of chemotherapeutic drugs is an important limitation to cancer therapy. Of these, cardiotoxicity is of crucial importance due to its negative influence on survival. The anthracyclines and cyclophosphamide are the most important cardiotoxic antineoplastic agents currently used. If we agree on a ceiling dosage of chemotherapy we will deprive some patients with a highly functional cardiac reserve of a potential benefit in the control of their cancer. Other patients who are more susceptible to the cardiotoxic effects of anticancer agents will suffer from severe cardiac disfunction following small cumulative doses of anthracyclines. The authors discuss the main cardiotoxic effects of several antineoplastic drugs with special attention given to the anthracycline group. Several diagnostic methods potentially useful in cardiac monitoring are described. Radionuclide angiocardiography is considered the gold-standard in monitoring anthracycline cardiotoxicity. Other invasive methods like endomyocardial biopsy and right heart catheterization can be clinically useful when nuclear angiocardiography is inconclusive. The authors propose an approach to the prevention of anthracycline cardiotoxicity. Other chemotherapeutic agents like cyclophosphamide are associated with the presence of myopericarditis which is sometimes fatal. The cardiotoxic effects of anticancer treatment with 5-fluorouracil, mitoxantrone, carmustine, amsacrine and interferon are less frequent and usually more benign. Finally we discuss bone marrow transplantation and its related cardiotoxicity.
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Affiliation(s)
- J F Sequeira
- Serviço de Medicina I, Hospital de Santa Maria, Lisboa
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