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Diaz RS, Hunter JR, Camargo M, Dias D, Galinskas J, Nassar I, de Lima IB, Caldeira DB, Sucupira MC, Schechter M. Dolutegravir-associated resistance mutations after first-line treatment failure in Brazil. BMC Infect Dis 2023; 23:347. [PMID: 37226112 DOI: 10.1186/s12879-023-08288-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 04/27/2023] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND Since January 2017, the recommended first-line antiretroviral regimen in Brazil is the fixed-dose combination of tenofovir plus lamivudine with dolutegravir (TL + D). According to the literature, integrase resistance-associated mutations (INRAMs) are rarely found upon virologic failure to first-line dolutegravir plus two nucleoside reverse transcriptase inhibitors. We evaluated the HIV antiretroviral genotypic resistance profile of patients referred for genotyping in the public health system who failed first-line TL + D after at least six months of therapy on or before December 31, 2018. METHODS HIV Sanger sequences of the pol gene were generated from plasma of patients with confirmed virologic failure to first-line TL + D in the Brazilian public health system before December 31, 2018. RESULTS One hundred thirteen individuals were included in the analysis. Major INRAMs were detected in seven patients (6.19%), four with R263K, one with G118R, one with E138A, and one with G140R. Four patients with major INRAMs also had the K70E and M184V mutations in the RT gene. Sixteen (14.2%) additional individuals presented minor INRAMs, and five (4,42%) patients had both major and minor INRAMS. Thirteen (11.5%) patients also presented mutations in the RT gene selected by tenofovir and lamivudine, including four with both the K70E and M184V mutations and four with only M184V. The integrase mutations L101I and T124A, which are in the in vitro pathway for integrase inhibitor resistance, were found in 48 and 19 patients, respectively. Mutations not related to TL + D, thus probable transmitted resistance mutations (TDR), were present in 28 patients (24.8%): 25 (22.1%) to nucleoside reverse transcriptase inhibitors, 19 (16.8%) to non-nucleoside reverse transcriptase inhibitors, and 6 (5.31%) to protease inhibitors. CONCLUSIONS In marked contrast to previous reports, we report a relatively high frequency of INRAMs among selected patients failing first-line TL + D in the public health system in Brazil. Possible reasons for this discrepancy include delays in detecting virologic failure, patients inadvertently on dolutegravir monotherapy, TDR, and/or infecting subtype.
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Affiliation(s)
| | | | | | - Danilo Dias
- Federal University of São Paulo, São Paulo, Brazil
| | | | | | | | | | | | - Mauro Schechter
- Federal University of São Paulo, São Paulo, Brazil
- Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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2
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Roohezamin A, Kalatehjari R, Hajihassani M, Kharghani M, Dias D. Investigation of acoustic waves behavior of an underground tunnel in a multilayer soil. Sci Rep 2022; 12:13399. [PMID: 35927442 PMCID: PMC9352697 DOI: 10.1038/s41598-022-16991-w] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/19/2022] [Indexed: 11/09/2022] Open
Abstract
Understanding the acoustic behavior of buried tunnels is valuable for locating them and monitoring their structure health. This research focuses on the acoustic behavior of buried tunnels in multilayer soil structures. The reflected and transmitted acoustic wave pressure variations are investigated exclusively for a multilayer soil buried tunnel. The tunnel system's 3D finite element model is presented, which contains the tunnel lining, surrounding soil, and the air inside the tunnel and at the ground surface. A free air explosion is used as the acoustic wave source. The reflected and transmitted waves' pressure values are measured to evaluate the effects of mechanical characteristics of soil layers, tunnel buried depths, and lining concrete types on the acoustic wave behavior of the tunnel. In addition, a utility line is introduced to the system in different positions related to the main tunnel to investigate its effect on the main tunnel's acoustic wave behavior. The results indicate that in a multilayer soil structure, the relative position of the soil layers and the tunnel (whether the main tunnel or the utility line) significantly impacts the acoustic pressure value, particularly the transmitted wave pressure. When changing the tunnel buried depth and the lining concrete type, multiple pressure peaks are observed in reflected acoustic wave pressure-time history exclusive to a tunnel surrounded by a multilayer soil structure. The findings can be used to precisely interpret the recorded signals for structural health monitoring and locating underground structures, especially in a media with multilayer soil structures.
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Affiliation(s)
- A Roohezamin
- Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - R Kalatehjari
- Built Environment Engineering Department, School of Future Environments, Auckland University of Technology, Auckland, 1010, New Zealand.
| | - M Hajihassani
- Department of Mining, Faculty of Engineering, Urmia University, Urmia, 5756151818, Iran
| | - M Kharghani
- Department of Mining, Faculty of Engineering, Islamic Azad University, Science and Research Branch of Tehran, Tehran, Iran
| | - D Dias
- Department of Civil Engineering, Université Grenoble Alpes, Laboratoire 3SR, 38610, Gières, France
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Diaz RS, Grangeiro A, Estevam DL, Galinskas J, Dias D, Schechter M. Pre-Exposure Prophylaxis Failure With a Multiple Drug-Resistant HIV-1 Clade C Virus in Brazil. J Acquir Immune Defic Syndr 2022; 89:e16. [PMID: 34629413 DOI: 10.1097/qai.0000000000002826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Ricardo S Diaz
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | - Juliana Galinskas
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Danilo Dias
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Mauro Schechter
- Projeto Praça Onze, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
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de Almeida Baptista MV, da Silva LT, Samer S, Oshiro TM, Shytaj IL, Giron LB, Pena NM, Cruz N, Gosuen GC, Ferreira PRA, Cunha-Neto E, Galinskas J, Dias D, Sucupira MCA, de Almeida-Neto C, Salomão R, da Silva Duarte AJ, Janini LM, Hunter JR, Savarino A, Juliano MA, Diaz RS. Immunogenicity of personalized dendritic-cell therapy in HIV-1 infected individuals under suppressive antiretroviral treatment: interim analysis from a phase II clinical trial. AIDS Res Ther 2022; 19:2. [PMID: 35022035 PMCID: PMC8753935 DOI: 10.1186/s12981-021-00426-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/16/2021] [Indexed: 11/12/2022] Open
Abstract
Background We developed a personalized Monocyte-Derived Dendritic-cell Therapy (MDDCT) for HIV-infected individuals on suppressive antiretroviral treatment and evaluated HIV-specific T-cell responses. Methods PBMCs were obtained from 10 HIV+ individuals enrolled in trial NCT02961829. Monocytes were differentiated into DCs using IFN-α and GM-CSF. After sequencing each patient’s HIV-1 Gag and determining HLA profiles, autologous Gag peptides were selected based on the predicted individual immunogenicity and used to pulse MDDCs. Three doses of the MDDCT were administered every 15 days. To assess immunogenicity, patients’ cells were stimulated in vitro with autologous peptides, and intracellular IL-2, TNF, and interferon-gamma (IFN-γ) production were measured in CD4+ and CD8+ T-cells. Results The protocol of ex-vivo treatment with IFN-α and GM-CSF was able to induce maturation of MDDCs, as well as to preserve their viability for reinfusion. MDDCT administration was associated with increased expression of IL-2 in CD4+ and CD8+ T-cells at 15 and/or 30 days after the first MDDCT administration. Moreover, intracellular TNF and IFN-γ expression was significantly increased in CD4+ T-cells. The number of candidates that increased in vitro the cytokine levels in CD4+ and CD8+ T cells upon stimulation with Gag peptides from baseline to day 15 and from baseline to day 30 and day 120 after MDDCT was significant as compared to Gag unstimulated response. This was accompanied by an increasing trend in the frequency of polyfunctional T-cells over time, which was visible when considering both cells expressing two and three out of the three cytokines examined. Conclusions MDDC had a mature profile, and this MDDCT promoted in-vitro T-cell immune responses in HIV-infected patients undergoing long-term suppressive antiretroviral treatment. Trial registration NCT02961829: (Multi Interventional Study Exploring HIV-1 Residual Replication: a Step Towards HIV-1 Eradication and Sterilizing Cure, https://www.clinicaltrials.gov/ct2/show/NCT02961829, posted November 11th, 2016) Supplementary Information The online version contains supplementary material available at 10.1186/s12981-021-00426-z.
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Maciel J, Dias D, Cavaco D, Donato S, Pereira MC, Simões-Pereira J. Growth hormone deficiency and other endocrinopathies after childhood brain tumors: results from a close follow-up in a cohort of 242 patients. J Endocrinol Invest 2021; 44:2367-2374. [PMID: 33683662 DOI: 10.1007/s40618-021-01541-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 02/19/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE Brain tumors are the most common solid tumor in children. The prevalence of survivors from these cancers has been increasing, presenting endocrine sequelae in more than 40% of the cases. Our aim was to characterize the endocrinopathies diagnosed in this population, exploring the outcomes of growth hormone treatment. METHODS We have performed a retrospective analysis of the survivors that were followed-up through a close protocol at our endocrine late-effects clinic. RESULTS 242 survivors, followed during 6.4 (0-23.4) years, were considered. The median age at tumor diagnosis was 6.7 (0-18) years and pilocytic astrocytoma was the most frequent neoplasm (33.5%). The prevalence of endocrinopathies was of 71.5%, with growth hormone deficiency being the most frequent (52.9%). An indirect correlation between the age at the beginning of somatropin and growth velocity in the first year of treatment was observed. Those treated with craniospinal radiotherapy presented a smaller final upper/lower segments ratio comparing with those that only received cranial radiotherapy. However, their final height was not compromised when compared to their family height target. We found pubertal delay in 12%; accelerated/precocious puberty in 13.2%; central and primary hypogonadism in 21.9% and 3.3%, respectively; primary and central hypothyroidism in 23.6% and 14.5%, respectively; thyroid nodules in 7.4%; ACTH deficiency in 10.3% and diabetes insipidus in 12%. CONCLUSION This study reveals a higher prevalence of endocrinopathies in brain tumors survivors and explores the influence of craniospinal irradiation in the adult body proportions. It reinforces the importance of routine follow-up among survivors.
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Affiliation(s)
- J Maciel
- Endocrinology Department, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal.
| | - D Dias
- Endocrinology Department, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
| | - D Cavaco
- Endocrinology Department, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
| | - S Donato
- Endocrinology Department, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
| | - M C Pereira
- Endocrinology Department, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
| | - J Simões-Pereira
- Endocrinology Department, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
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Blum VF, Cimerman S, Hunter JR, Tierno P, Lacerda A, Soeiro A, Cardoso F, Bellei NC, Maricato J, Mantovani N, Vassao M, Dias D, Galinskas J, Janini LMR, Santos-Oliveira JR, Da-Cruz AM, Diaz RS. Corrigendum to "Nitazoxanide superiority to placebo to treat moderate COVID-19 - A Pilot prove of concept randomized double-blind clinical trial." [EClinicalMedicine 37 (2021) 100981]. EClinicalMedicine 2021; 41:101203. [PMID: 34805808 PMCID: PMC8590842 DOI: 10.1016/j.eclinm.2021.101203] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
[This corrects the article DOI: 10.1016/j.eclinm.2021.100981.].
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Affiliation(s)
| | | | | | - Paulo Tierno
- Hospital Municipal Dr. Francisco Moran (Barueri)
| | | | | | | | | | | | | | | | - Danilo Dias
- Federal University of São Paulo, São Paulo, Brazil
| | | | | | | | - Alda Maria Da-Cruz
- Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Brazil (Laboratório Interdisciplinar de Pesquisa Médicas, Instituto Oswaldo Cruz (FIOCRUZ)
| | - Ricardo Sobhie Diaz
- Federal University of São Paulo, São Paulo, Brazil
- Corresponding author: Professor Ricardo Sobhie Diaz, Federal University of Sao Paulo, Pedro de Toledo 669, 04039032 Sao Paulo, SP, Brazil, Phone: +55-11991090445, Fax: +55-1150844262
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Blum VF, Cimerman S, Hunter JR, Tierno P, Lacerda A, Soeiro A, Cardoso F, Bellei NC, Maricato J, Mantovani N, Vassao M, Dias D, Galinskas J, Janini LMR, Santos-Oliveira JR, Da-Cruz AM, Diaz RS. Nitazoxanide superiority to placebo to treat moderate COVID-19 - A Pilot prove of concept randomized double-blind clinical trial. EClinicalMedicine 2021; 37:100981. [PMID: 34222847 PMCID: PMC8235996 DOI: 10.1016/j.eclinm.2021.100981] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 05/14/2021] [Accepted: 06/03/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The absence of specific antivirals to treat COVID-19 leads to the repositioning of candidates' drugs. Nitazoxanide (NTZ) has a broad antiviral effect. METHODS This was a randomized, double-blind pilot clinical trial comparing NTZ 600 mg BID versus Placebo for seven days among 50 individuals (25 each arm) with SARS-COV-2 RT-PCR+ (PCR) that were hospitalized with mild respiratory insufficiency from May 20th, 2020, to September 21st, 2020 (ClinicalTrials.gov NCT04348409). Clinical and virologic endpoints and inflammatory biomarkers were evaluated. A five-point scale for disease severity (SSD) was used. FINDINGS Two patients died in the NTZ arm compared to 6 in the placebo arm (p = 0.564). NTZ was superior to placebo when considering SSD (p < 0001), the mean time for hospital discharge (6.6 vs. 14 days, p = 0.021), and negative PCR at day 21 (p = 0.035), whereas the placebo group presented more adverse events (p = 0.04). Among adverse events likely related to the study drug, 14 were detected in the NTZ group and 22 in placebo (p = 0.24). Among the 30 adverse events unlikely related, 21 occurred in the placebo group (p = 0.04). A decrease from baseline was higher in the NTZ group for d-Dimer (p = 0.001), US-RCP (p < 0.002), TNF (p < 0.038), IL-6 (p < 0.001), IL-8 (p = 0.014), HLA DR. on CD4+ T lymphocytes (p < 0.05), CD38 in CD4+ and CD8+ T (both p < 0.05), and CD38 and HLA-DR. on CD4+ (p < 0.01). INTERPRETATION Compared to placebo in clinical and virologic outcomes and improvement of inflammatory outcomes, the superiority of NTZ warrants further investigation of this drug for moderate COVID-19 in larger clinical trials. A higher incidence of adverse events in the placebo arm might be attributed to COVID-19 related symptoms.
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Affiliation(s)
| | | | | | - Paulo Tierno
- Hospital Municipal Dr. Francisco Moran (Barueri), Rua Ângela Mirella, Brazil
| | | | | | | | | | | | | | | | - Danilo Dias
- Federal University of São Paulo, São Paulo, Brazil
| | | | | | | | - Alda Maria Da-Cruz
- Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Brazil (Laboratório Interdisciplinar de Pesquisa Médicas, Instituto Oswaldo Cruz (FIOCRUZ), Brazil
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Jaramillo L, Santos D, Guedes D, Dias D, Borges E, Pereira N. Production of Lactic Acid Enantiomers by Lactobacillus Strains under Limited Dissolved Oxygen Conditions in the Presence of a Pentose Fraction. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821040050] [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: 11/23/2022]
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9
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Faria MT, Rodrigues S, Dias D, Rego R, Rocha H, Sa F, Oliveira A, Campelo M, Pereira J, Rocha-Goncalves F, Cunha JPS, Martins E. P2550The influence of tonic-clonic seizures on heart rate variability in patients with refractory epilepsy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0878] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Heart Rate Variability (HRV) is an increasing area of interest in patients with epilepsy. The effects of epilepsy on the autonomic control of the heart are not completely understood and that autonomic dysfunction has been implicated in some cases of Sudden Unexpected Death in Epilepsy (SUDEP).
Objective
To study the influence of generalized tonic-clonic seizures (GTCS) on HRV of patients with focal refractory epilepsy.
Method
We prospectively evaluated (January 2015 to July 2018) 121 patients admitted to our institution's Epilepsy Monitoring Unit. All patients performed a 48-hour Holter recording. Patients who had GTCS during the recording were included and we selected the first GTCS as the index seizure. HRV (AVNN, SDNN, RMSSD, pNN50, and LF/HF) was evaluated by analyzing 5-min-ECG epochs during inter-ictal and post-ictal periods: baseline, pre-ictal (5 min before the GTCS seizure), post-ictal (5 min after the seizure), and late post-ictal (>5 hours after the seizure). We compared HRV data from these patients with normative values for a healthy population (controlling age and gender). The study was approved by our Institution Ethics Committee and all patients gave informed consent.
Results
Twenty three patients were included (mean age: 38.61±11.58; 70% Female). Thirty percent presented cardiovascular risk factors without known cardiac disease. We found significant differences between the analyzed periods for all but one (LF/HF) HRV metrics (using Friedman test, p<0.05, two-tailed). Specifically during the post-ictal period, we found a significant reduction for AVNN, SDNN, RMSSD and pNN50 (Wilcoxon test, p<0.05; two-tailed). LF/HF was increased during this period, but changes were not statistically significant. There was also a tendency for a reduction of AVNN, SDNN, RMSSD and pNN50 and an increase of LF/HF in our patients during all the analyzed periods when compared to normative healthy population values.
Conclusion
Our work shows reduced HRV after a GTCS in patients with focal resistant epilepsy, both in inter-ictal and post-ictal periods, when compared to normative healthy population values. These results might reflect long term structural changes in autonomic centers. The HRV changes were significant particularly during the post-ictal period, and should prompt further investigation, giving this period is critical for SUDEP.
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Affiliation(s)
- M T Faria
- Centro Hospitalar Universitário de São João, E.P.E., Nuclear Medicine Department, Porto, Portugal
| | - S Rodrigues
- Institute for Systems Engineering and Computers - Technology and Science (INESC TEC), FEUP, Porto, Portugal
| | - D Dias
- Institute for Systems Engineering and Computers - Technology and Science (INESC TEC), FEUP, Porto, Portugal
| | - R Rego
- Centro Hospitalar Universitário de São João, E.P.E., Neurophysiology Unit, Neurology Department, Porto, Portugal
| | - H Rocha
- Centro Hospitalar Universitário de São João, E.P.E., Neurophysiology Unit, Neurology Department, Porto, Portugal
| | - F Sa
- Centro Hospitalar Universitário de São João, E.P.E., Neurophysiology Unit, Neurology Department, Porto, Portugal
| | - A Oliveira
- Centro Hospitalar Universitário de São João, E.P.E., Nuclear Medicine Department, Porto, Portugal
| | - M Campelo
- Centro Hospitalar Universitário de São João, E. P. E., Cardiology Department, Porto, Portugal
| | - J Pereira
- Centro Hospitalar Universitário de São João, E.P.E., Nuclear Medicine Department, Porto, Portugal
| | - F Rocha-Goncalves
- Faculty of Medicine University of Porto, Medicine Department, Porto, Portugal
| | - J P S Cunha
- Institute for Systems Engineering and Computers - Technology and Science (INESC TEC), FEUP, Porto, Portugal
| | - E Martins
- Faculty of Medicine University of Porto, Medicine Department, Porto, Portugal
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Faria MT, Rodrigues S, Dias D, Rego R, Rocha H, Sa F, Oliveira A, Campelo M, Pereira J, Rocha-Goncalves F, Cunha JPS, Martins E. P5346The effect of seizure type on ictal and early post-ictal Heart Rate Variability in patients with focal resistant epilepsy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0313] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Seizures commonly affect the heart rate and its variability. The increased interest in this area of research is related to the possible connection with sudden unexpected death in epilepsy (SUDEP). Generalized tonic-clonic seizures (GTCS) are reported as the most consistent risk factor for SUDEP. However, the general risk of seizures (and their type) on cardiac function still remains uncertain.
Purpose
To evaluate the influence of seizure type (GTCS vs non-GTCS) on ictal and early post-ictal Heart Rate Variability (HRV) in patients with refractory epilepsy.
Methods
From January 2015 to July 2018, we prospectively evaluated 121 patients admitted to our institution's Epilepsy Monitoring Unit with focal resistant epilepsy. All patients underwent a 48-hour Holter recording. We included only patients who had both GTCS and non-GTCS during the recording and selected the first seizure of each type to analyze. HRV (AVNN, SDNN, RMSSD, pNN50, and LF/HF) was evaluated by analyzing 5-min-ECG epochs, starting with the seizure onset (ictal and early post-ictal period). The study was approved by our Institution Ethics Committee and all patients gave informed consent.
Results
Fourteen patients were included (7 Females, 4 patients with Temporal Lobe Epilepsy). The median age was 39 years (min-max, 18–57). Thirty-six percent presented cardiovascular risk factors without known cardiac disease.
A significant statistical reduction was found for AVNN (p=0.013), RMSSD (p=0.008), pNN50 (p=0.005) and HF (p=0.003), during GTCS when compared with non-GTCS (Wilcoxon test, p<0.05; two tailed).
Conclusion
Our study shows a significant reduced vagal tone during GTCS when compared with non-GTCS. Hence, GTCS had a more pronounced impact on HRV changes than other seizure types, which can be associated with higher SUDEP risk after GTCS.
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Affiliation(s)
- M T Faria
- Centro Hospitalar Universitário de São João, E.P.E., Nuclear Medicine Department, Porto, Portugal
| | - S Rodrigues
- Institute for Systems Engineering and Computers - Technology and Science (INESC TEC), FEUP, Porto, Portugal
| | - D Dias
- Institute for Systems Engineering and Computers - Technology and Science (INESC TEC), FEUP, Porto, Portugal
| | - R Rego
- Centro Hospitalar Universitário de São João, E.P.E., Neurophysiology Unit, Neurology Department, Porto, Portugal
| | - H Rocha
- Centro Hospitalar Universitário de São João, E.P.E., Neurophysiology Unit, Neurology Department, Porto, Portugal
| | - F Sa
- Centro Hospitalar Universitário de São João, E.P.E., Neurophysiology Unit, Neurology Department, Porto, Portugal
| | - A Oliveira
- Centro Hospitalar Universitário de São João, E.P.E., Nuclear Medicine Department, Porto, Portugal
| | - M Campelo
- Centro Hospitalar Universitário de São João, E. P. E., Cardiology Department, Porto, Portugal
| | - J Pereira
- Centro Hospitalar Universitário de São João, E.P.E., Nuclear Medicine Department, Porto, Portugal
| | - F Rocha-Goncalves
- Faculty of Medicine University of Porto, Medicine Department, Porto, Portugal
| | - J P S Cunha
- Institute for Systems Engineering and Computers - Technology and Science (INESC TEC), FEUP, Porto, Portugal
| | - E Martins
- Faculty of Medicine University of Porto, Medicine Department, Porto, Portugal
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Bellesso M, Santucci R, Centrone R, Dias D, Alves A. REAL LIFE DATA ABOUT CHARACTERISTICS, STANDARD TREATMENT AND OUTCOMES IN BRAZILIAN ELDERLY PATIENTS WITH DIFFUSE LARGE B-CELL LYMPHOMA - A SINGLE CENTER ANALYSIS. Hematol Oncol 2019. [DOI: 10.1002/hon.89_2631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M. Bellesso
- Hematology; Instituto Hemomed; Sao Paulo Brazil
| | - R. Santucci
- Hematology; Instituto Hemomed; Sao Paulo Brazil
| | - R. Centrone
- Hematology; Instituto Hemomed; Sao Paulo Brazil
| | - D. Dias
- Hematology; Instituto Hemomed; Sao Paulo Brazil
| | - A. Alves
- Hematology; Instituto Hemomed; Sao Paulo Brazil
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12
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Dias D, Caetano T, Torres RT, Fonseca C, Mendo S. Shiga toxin-producing Escherichia coli in wild ungulates. Sci Total Environ 2019; 651:203-209. [PMID: 30227290 DOI: 10.1016/j.scitotenv.2018.09.162] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 09/12/2018] [Accepted: 09/12/2018] [Indexed: 06/08/2023]
Abstract
Shiga toxin-producing Escherichia coli (STEC) are zoonotic pathogens that live in the gastrointestinal tract of wildlife and cattle without causing disease. In humans, their colonization and infection lead to life-threatening disease. We investigated the occurrence of STEC in wild ungulates (wild boar, red deer and roe deer) inhabiting areas differently impacted by anthropogenic activities. STEC were detected in 9% (n = 6) of the samples and were recovered from the three species: 1 of wild boar, 4 of red deer and 1 of roe deer. All the isolates (n = 7) were non-O157 STEC encoding stx1 (n = 2; 29%) and/or stx2 genes (n = 6; 86%). O27:H30 was the most frequent serotype identified, followed by O146:H21 and O146:H28. Two STEC were O-untypable: ONT:H28 and ONT:H52. The phylo-groups identified were B1 (n = 3), E (n = 3) and F (n = 1). All the isolates recovered were susceptible to the different classes of antibiotics tested, although resistance genes were found in two strains. Apart from stx, all STEC encode many virulence factors (VF), particularly adhesins and/or other toxins. A strain with 13 VF collected from roe deer has a high enterohemorrhagic risk due to the presence of intimin, hemolysin and protease effectors genes. Enterohemorrhagic E. coli (EHEC) are implicated in the major cases of human infection and mortality, highlighting the zoonotic potential of wildlife-associated STEC. Wild ungulates are reservoirs of STEC potentially pathogenic to humans. Therefore, following the One Health concept, it is crucial to establish worldwide local monitoring programs that will benefit human, animal and environmental health.
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Affiliation(s)
- D Dias
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - T Caetano
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - R T Torres
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - C Fonseca
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - S Mendo
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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Lisenko K, Saad F, Oliveira M, Silva T, Costa D, Dias D, Damasceno M, Oliveira L, Junior S, Zangeronimo M, de Godoy M. PSXIII-25 Use of insect meal an alternative protein source in feline nutrition. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Lisenko
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - F Saad
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - M Oliveira
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - T Silva
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - D Costa
- Federal University of Minas Gerais,Montes Claros, Minas Gerais, Brazil
| | - D Dias
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - M Damasceno
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - L Oliveira
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - S Junior
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - M Zangeronimo
- Federal University of Lavras,Lavras, Minas Gerais, Brazil
| | - M de Godoy
- Division of Nutritional Sciences and Department of Animal Sciences, University of Illinois at Urbana-Champaign,Urbana, IL, United States
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Dias D, Lapa N, Bernardo M, Ribeiro W, Matos I, Fonseca I, Pinto F. Cr(III) removal from synthetic and industrial wastewaters by using co-gasification chars of rice waste streams. Bioresour Technol 2018; 266:139-150. [PMID: 29960244 DOI: 10.1016/j.biortech.2018.06.054] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/15/2018] [Accepted: 06/16/2018] [Indexed: 06/08/2023]
Abstract
Blends of rice waste streams were submitted to co-gasification assays. The resulting chars (G1C and G2C) were characterized and used in Cr(III) removal assays from a synthetic solution. A Commercial Activated Carbon (CAC) was used for comparison purposes. The chars were non-porous materials mainly composed by ashes (68.3-92.6% w/w). The influences of adsorbent loading (solid/liquid ratio - S/L) and initial pH in Cr(III) removal were tested. G2C at a S/L of 5 mg L-1 and an initial pH of 4.50 presented an uptake capacity significantly higher than CAC (7.29 and 2.59 mg g-1, respectively). G2C was used in Cr(III) removal assays from an industrial wastewater with Cr(III) concentrations of 50, 100 and 200 mg L-1. Cr(III) removal by precipitation (uptake capacity ranging from 11.1 to 14.9 mg g-1) was more effective in G2C, while adsorption (uptake capacity of 16.1 mg g-1) was the main removal mechanism in CAC.
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Affiliation(s)
- D Dias
- LAQV/REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa (DCTB), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal.
| | - N Lapa
- LAQV/REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa (DCTB), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - M Bernardo
- LAQV/REQUIMTE, Departamento de Química (DQ), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - W Ribeiro
- LAQV/REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa (DCTB), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - I Matos
- LAQV/REQUIMTE, Departamento de Química (DQ), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - I Fonseca
- LAQV/REQUIMTE, Departamento de Química (DQ), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - F Pinto
- Unidade de Bioenergia (UB), Laboratório Nacional de Energia e Geologia (LNEG), Estrada do Paço do Lumiar, Ed. J, 1649-038 Lisboa, Portugal
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Mellinger S, Dias D, Flores N, Palavecino A, Vigo G, Burgos D, Tomas F, Rollan I, Herrera G, Floridia J, Furlan C, Frissia F, Aleman A, Perez Frías J, Casali J, Burgos M. Multiple sclerosis prevalence in Salta City, Argentina. Mult Scler Relat Disord 2018; 25:212-215. [DOI: 10.1016/j.msard.2018.07.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 07/14/2018] [Accepted: 07/18/2018] [Indexed: 11/25/2022]
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van den Besselaar A, Tripodi A, Shiach C, Jespersen J, Poller L, Keown M, Chauhan N, Conard J, Dias D, Egberg N, Iriarte J, Kontopoulou-Griva I, Otridge B. European Concerted Action on Anticoagulation. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1613097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryA procedure for using citrated fresh plasmas for International Sensitivity Index (ISI) calibration of two types of whole blood point-of-care test (POCT) prothrombin time (PT) monitor systems has been assessed in a multicentre study.The CoaguChek Mini and TAS PT-NC systems gave higher ISI with whole blood samples than with fresh plasma calibrations. However, there was good agreement between whole blood and fresh plasma monitor system International Normalised Ratio (INR) and the reference INR of target samples.Reliable INR can therefore be obtained with both whole blood and plasma samples on these two POCT systems based on their respective ISI. With the CoaguChek Mini system, the plasma calibration ISI can also be used to derive reliable INR with whole blood PT results. This was not possible with the TAS PT-NC system.
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Diaz R, Giron L, Galinskas J, Dias D, Hunter J, Tenore S, Gosuen G, Samer S, Umaki M, Shoaib Arif M, Nutini M, Luca Shytaj I, Lucic B, Lusic M, Janini M, Sucupira M, Savarino A. Safety and potential impact of auranofin on the viral reservoir in HIV positive individuals under mega-ART. J Virus Erad 2017. [DOI: 10.1016/s2055-6640(20)30654-3] [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: 11/16/2022] Open
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Dias D, Lapa N, Bernardo M, Godinho D, Fonseca I, Miranda M, Pinto F, Lemos F. Properties of chars from the gasification and pyrolysis of rice waste streams towards their valorisation as adsorbent materials. Waste Manag 2017; 65:186-194. [PMID: 28400156 DOI: 10.1016/j.wasman.2017.04.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 03/21/2017] [Accepted: 04/03/2017] [Indexed: 06/07/2023]
Abstract
Rice straw (RS), rice husk (RH) and polyethylene (PE) were blended and submitted to gasification and pyrolysis processes. The chars obtained were submitted to textural, chemical, and ecotoxic characterisations, towards their possible valorisation. Gasification chars were mainly composed of ashes (73.4-89.8wt%), while pyrolysis chars were mainly composed of carbon (53.0-57.6wt%). Silicon (Si) was the major mineral element in all chars followed by alkaline and alkaline-earth metal species (AAEMs). In the pyrolysis chars, titanium (Ti) was also a major element, as the feedstock blends contained high fractions of PE which was the main source of Ti. Gasification chars showed higher surface areas (26.9-62.9m2g-1) and some microporosity, attributed to porous silica. On the contrary, pyrolysis chars did not present a porous matrix, mainly due to their high volatile matter content. The gasification bed char produced with 100% RH, at 850°C, with O2 as gasification agent, was selected for further characterization. This char presented the higher potential to be valorised as adsorbent material (higher surface area, higher content of metal cations with exchangeable capacity, and lowest concentrations of toxic heavy metals). The char was submitted to an aqueous leaching test to assess the mobility of chemical species and the ecotoxic level for V. fischeri. It was observed that metallic elements were significantly retained in the char, which was attributed mainly to its alkaline character. This alkaline condition promoted some ecotoxicity level on the char eluate that was eliminated after the pH correction.
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Affiliation(s)
- D Dias
- LAQV/REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa (DCTB), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - N Lapa
- LAQV/REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa (DCTB), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - M Bernardo
- LAQV/REQUIMTE, Departamento de Química (DQ), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal.
| | - D Godinho
- LAQV/REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa (DCTB), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - I Fonseca
- LAQV/REQUIMTE, Departamento de Química (DQ), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - M Miranda
- Unidade de Bioenergia (UB), Laboratório Nacional de Energia e Geologia (LNEG), Estrada do Paço do Lumiar, Ed. J, 1649-038 Lisboa, Portugal
| | - F Pinto
- Unidade de Bioenergia (UB), Laboratório Nacional de Energia e Geologia (LNEG), Estrada do Paço do Lumiar, Ed. J, 1649-038 Lisboa, Portugal
| | - F Lemos
- IBB - Instituto de Biotecnologia e Bioengenharia, Departamento de Engenharia Química (DEQ), Instituto Superior Técnico (IST), Universidade de Lisboa (UL), Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Almeida C, Simões R, Coimbra-Dores MJ, Rosa F, Dias D. Mitochondrial DNA analysis of Rhipicephalus sanguineus s.l. from the western Iberian peninsula. Med Vet Entomol 2017; 31:167-177. [PMID: 28165138 DOI: 10.1111/mve.12222] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 10/15/2016] [Accepted: 10/19/2016] [Indexed: 06/06/2023]
Abstract
Rhipicephalus sanguineus Latreille (1806) (Ixodida: Ixodidae) is considered to be the most widely distributed tick and to have a vast range of habitats and hosts, including livestock, pets and wildlife. In addition to morphological differences, recent investigations using approaches based on molecular genetic markers have revealed the existence of different R. sanguineus lineages in different geographic regions. In this study, 475 ticks collected from dogs in the western Iberian peninsula were studied both morphologically and genetically, using 12S and 16S rDNA and COI gene markers in order to clarify the controversy over the systematic status of R. sanguineus sensu lato in Western Europe, and to compare the present data with those sourced from studies conducted in other regions of the world. Despite the high morphometric variability, particularly on spiracles in both genders and in female genitalia, data obtained with different genetic molecular markers show very low variability, suggesting the existence of a unique species. In addition, the phylogenetic analysis showed genetic uniformity, supporting the existence of a well-defined clade consisting of R. sanguineus s.l. specimens from Western Europe that are distinct from R. sanguineus s.l. from Africa. Furthermore, these data corroborate the existence of a polymorphic species in Western Europe, which requires to be consensually redescribed in view of its medical and veterinary importance in pathogen transmission.
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Affiliation(s)
- C Almeida
- Faculdade de Ciências, Departamento de Biologia Animal, Universidade de Lisboa, Lisbon, Portugal
| | - R Simões
- Faculdade de Ciências, Departamento de Biologia Animal, Universidade de Lisboa, Lisbon, Portugal
| | - M J Coimbra-Dores
- Faculdade de Ciências, Departamento de Biologia Animal, Universidade de Lisboa, Lisbon, Portugal
- Faculdade de Ciências, Centro de Estudos do Ambiente e do Mar, Universidade de Lisboa, Lisbon, Portugal
| | - F Rosa
- Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
| | - D Dias
- Faculdade de Ciências, Departamento de Biologia Animal, Universidade de Lisboa, Lisbon, Portugal
- Faculdade de Ciências, Centro de Estudos do Ambiente e do Mar, Universidade de Lisboa, Lisbon, Portugal
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Slimani R, Oxarango L, Sbartai B, Tinet AJ, Olivier F, Dias D. Leachate flow around a well in MSW landfill: Analysis of field tests using Richards model. Waste Manag 2017; 63:122-130. [PMID: 27553909 DOI: 10.1016/j.wasman.2016.07.048] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 06/15/2016] [Accepted: 07/31/2016] [Indexed: 06/06/2023]
Abstract
During the lifespan of a Municipal Solid Waste landfill, its leachate drainage system may get clogged. Then, as a consequence of rainfall, leachate generation and possibly leachate injection, the moisture content in the landfill increases to the point that a leachate mound could be created. Therefore, pumping the leachate becomes a necessary solution. This paper presents an original analysis of leachate pumping and injection in an instrumented well. The water table level around the well is monitored by nine piezometers which allow the leachate flow behaviour to be captured. A numerical model based on Richards equation and an exponential relationship between saturated hydraulic conductivity and depth is used to analyze the landfill response to pumping and injection. Decreasing permeability with depth appears to have a major influence on the behaviour of the leachate flow. It could have a drastic negative impact on the pumping efficiency with a maximum quasi-stationary pumping rate limited to approximately 1m3/h for the tested well and the radius of influence is less than 20m. The numerical model provides a reasonable description of both pumping and injection tests. However, an anomalous behaviour observed at the transition between pumping and recovery phases is observed. This could be due to a limitation of the Richards model in that it neglects the gas phase behaviour and other double porosity heterogeneous effects.
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Affiliation(s)
- R Slimani
- University of Skikda, Algeria; Laboratoire d'etude des Transferts en Hydrologie et Environnement (LTHE), Université Grenoble Alpes, BP 53 38041 Grenoble Cedex 09, France
| | - L Oxarango
- Laboratoire d'etude des Transferts en Hydrologie et Environnement (LTHE), Université Grenoble Alpes, BP 53 38041 Grenoble Cedex 09, France.
| | - B Sbartai
- University of Badji Mokhtar-Annaba, Algeria
| | - A-J Tinet
- Laboratoire d'etude des Transferts en Hydrologie et Environnement (LTHE), Université Grenoble Alpes, BP 53 38041 Grenoble Cedex 09, France; Université de Lorraine (ENSG)/CNRS/CREGU, GeoRessources Laboratory, F-54518 Vandoeuvre-lès-Nancy Cedex, France
| | - F Olivier
- ECOGEOS, Geoenvironmental Advisory Services, 5 rue du Jeu de Paume, 62000 Arras, France
| | - D Dias
- Laboratoire d'etude des Transferts en Hydrologie et Environnement (LTHE), Université Grenoble Alpes, BP 53 38041 Grenoble Cedex 09, France; Laboratoire Sol, Solide, Structure, Risque (3SR), Université Grenoble Alpes, BP 53 38041 Grenoble Cedex 09, France
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Godinho D, Dias D, Bernardo M, Lapa N, Fonseca I, Lopes H, Pinto F. Adding value to gasification and co-pyrolysis chars as removal agents of Cr 3. J Hazard Mater 2017; 321:173-182. [PMID: 27619963 DOI: 10.1016/j.jhazmat.2016.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/17/2016] [Accepted: 09/03/2016] [Indexed: 06/06/2023]
Abstract
The present work aims to assess the efficiency of chars, obtained from the gasification and co-pyrolysis of rice wastes, as adsorbents of Cr3+ from aqueous solution. GC and PC chars, produced in the gasification and co-pyrolysis, respectively, of rice husk and polyethylene were studied. Cr3+ removal assays were optimised for the initial pH value, adsorbent mass, contact time and Cr3+ initial concentration. GC showed a better performance than PC with about 100% Cr3+ removal, due to the pH increase that caused Cr precipitation. Under pH conditions in which the adsorption prevailed (pH<5.5), GC presented the highest uptake capacity (21.1mg Cr3+ g-1 char) for the following initial conditions: 50mg Cr3+ L-1; pH 5; contact time: 24h;L/S ratio: 1000mLg-1. The pseudo-second order kinetic model showed the best adjustment to GC experimental data. Both the first and second order kinetic models fitted well to PC experimental data. The ion exchange was the dominant phenomenon on the Cr3+ adsorption by GC sample. Also, this char significantly reduced the ecotoxicity of Cr3+ solutions for the bacterium Vibrio fischeri. GC char proved to be an efficient material to remove Cr3+ from aqueous solution, without the need for further activation.
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Affiliation(s)
- D Godinho
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - D Dias
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - M Bernardo
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - N Lapa
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - I Fonseca
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - H Lopes
- Unidade de Bioenergia, Laboratório Nacional de Energia e Geologia, Estrada do Paço do Lumiar, Ed. J, 1649-038 Lisboa, Portugal
| | - F Pinto
- Unidade de Bioenergia, Laboratório Nacional de Energia e Geologia, Estrada do Paço do Lumiar, Ed. J, 1649-038 Lisboa, Portugal
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Alcobia A, Dias D, Garcia M, Soares A. DI-084 Cost-utility of sofosbuvir-based treatment for untreated genotype 1 and 3 hepatitis C patients. Eur J Hosp Pharm 2015. [DOI: 10.1136/ejhpharm-2015-000639.258] [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: 11/04/2022] Open
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23
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França DS, Pereira SN, Maas ACS, Martins MA, Bolzan DP, Lima IP, Dias D, Peracchi AL. Ectoparasitic flies (Diptera, Streblidae) of bats (Chiroptera, Phyllostomidae) in an Atlantic Forest area, southeastern Brazil. BRAZ J BIOL 2014; 73:847-54. [PMID: 24789402 DOI: 10.1590/s1519-69842013000400022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 11/27/2012] [Indexed: 11/21/2022] Open
Abstract
We studied infestation rates and parasite-host associations between streblid flies and phyllostomid bats in an Atlantic Forest area of Rio de Janeiro state, southeastern Brazil. We captured 301 individuals from seven Phyllostomidae bat species. Out of that total, 69 bats had been parasitised by nine Streblidae species; the most frequent species were Trichobius joblingi and Trichobius tiptoni. The species Paraeuctenodes longipes, associated with Anoura geoffroyi, was the most frequent species. The highest mean intensity was observed for Paraeuctenodes longipes, associated with A. geoffroyi, and Paratrichobius longicrus associated with Artibeus lituratus, both ectoparasite species with a mean intensity of five individuals per bat. Trichobius joblingi exhibited the highest mean abundance, which was over three on its host species. Streblid richness in the study area was similar to the richness found in other studies carried out in the Atlantic Forest. We observed that streblid richness in this biome depends more on inherent characteristics of each physiognomy and on the host-species than on the sampling effort.
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Affiliation(s)
- D S França
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - S N Pereira
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - A C S Maas
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - M A Martins
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - D P Bolzan
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - I P Lima
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - D Dias
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Fundação Oswaldo Cruz, Manguinhos, Rio de Janeiro, RJ, Brazil
| | - A L Peracchi
- Laboratório de Mastozoologia, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
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Oliveira A, Farinha A, Rebelo M, Dias D. Forensic entomology: Molecular identification of blowfly species (Diptera: Calliphoridae) in Portugal. Forensic Science International: Genetics Supplement Series 2011. [DOI: 10.1016/j.fsigss.2011.09.081] [Citation(s) in RCA: 3] [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: 11/25/2022]
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25
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Correia R, Dias D, Bastos-Leite A, Rio E, Curral R. Dementia in multiple sclerosis: report of a case with cortical grey matter involvement and frontal-type-like clinical features. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72192-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background/introductionAlthough multiple sclerosis (MS), a demyelinating disease of unknown aetiology, is primarily a white matter disease, it may also involve the grey matter, a feature not often demonstrated in vivo by means of magnetic resonance imaging (MRI). The involvement of cortical grey matter in MS may account for cognitive dysfunction and behavioural abnormalities.ObjectiveThe purpose of this report is to present the case of a patient with MS and clinical features mimicking dementia of the frontal type due to clear-cut cortical grey matter involvement in the left frontal lobe.Case reportA 55-year-old woman with relapsing remitting MS developed a clinical picture characterized by frontal deficits (e.g. attention, verbal fluency, and speed processing), disinhibition, loss of insight, perseveration, abnormal eating behaviour, agitation, insomnia, and depersonalization phenomena. Neuropsychological evaluation also revealed abnormal performance on the Trail Making and the Stroop tests. Besides typical demyelinating lesions and “black holes”, MRI showed a striking pattern of left frontal opercular involvement including cortical thinning, focal knife-edge appearance of the gyri, and marked gliosis in the adjacent white matter.DiscussionCognitive deficits in MS are typically subcortical, due to the expected predominance of white matter lesions. Nonetheless, the involvement of grey matter structures may contribute to a different pattern of cognitive dysfunction. For example, hippocampal involvement has been linked to memory impairment. This particular case report additionally illustrates how cortical grey matter involvement in the frontal lobe may lead (not unexpectedly) to a clinical condition mostly characterised by frontal deficits and psychiatric symptoms.
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Souza FAC, Dias R, Fernandes CE, Pimentel F, Dias D. Menstrual irregularity: a possible clinical marker of metabolic dysfunction in women with class III obesity. Gynecol Endocrinol 2010; 26:768-72. [PMID: 20515256 DOI: 10.3109/09513590.2010.487603] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
PURPOSE To evaluate whether menstrual irregularity in morbidly obese women is indicative of metabolic dysfunction. PATIENTS AND METHODS Fifty-seven women with morbid obesity were evaluated. They were divided into two groups: one comprising women without menstrual dysfunctions or hirsutism (Group 1), and another obese women showing menstrual dysfunction with or without hirsutism (Group 2). The following were evaluated: age, colour, childbirth, marital status, profession, socio-economic level, education, age at menarche, body weight, height, body mass index, presence of hirsutism (Ferriman Gallwey Index), abdominal circumference, hip circumference, waist-to-hip ratio, menstrual cycle, blood pressure, presence of acanthosis nigricans, insulin resistance (IR), fasting glycaemia, total cholesterol, HDL-C, LDL-C, triglycerides, thyroid-stimulating hormone, free T4, luteinising hormone (LH), follicle-stimulating hormone, prolactin, total testosterone, dehydroepiandrosterone sulfate, insulin and the Homeostasis Model Assessment (HOMA test). RESULTS Clinical and epidemiological aspects did not present statistical differences. Clinical and laboratory parameters did not show statistically significant alterations; however, HOMA test values for Group 2 were significantly higher than those for Group 1. CONCLUSIONS The presence of IR in class III obese women can cause menstrual dysfunctions such as amenorrhoea or oligomenorrhoea even in the absence of hyperandrogenism, suggesting that IR plays an important role in the ovarian mechanisms involved in the menstrual cycle control.
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Affiliation(s)
- F A C Souza
- Masters, Post graduation Program in Gynecology, Obstetrics, and Mastolgy, Specializing in Tocogynecology, Botucatu School of Medicine - UNESP, SP, Brazil, Head of Gynecology and Obstetrics Department, Unoeste School of Medicine, Presidente Prudente, SP, Brazil.
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Maltez J, Dias D, Silva H. Endophenotypes and Diagnostic Categories: Event-related Potentials and the Schizophrenia-bipolar Dichotomy. Eur Psychiatry 2009. [DOI: 10.1016/s0924-9338(09)71392-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
After decades of neuroscientific research and taxonomic endeavour in psychiatry the quest for biologic markers specific enough to accommodate nosologic categories has not succeeded. Yet, neurophysiology and neuroimaging have developed pwoerful tools to investigate brain function. an immense amount of data has been accumulated regarding normal and pathologic information processing, cognition, emotion and other domains. Some have been correlated with genes underpinning diseases and are candidate endophenotypes. These stand at an intermediate level between genes and phenotype. They encompass several kinds of dysfunctions or abnormalities in brain structure. Rather than matching to singular diagnostic categories, as we devise them today, the same endophenotype is usually shared by distinct pathologic entities. Assuming tha they reflect specif dysfunctions this raises critical questions regarding the DSM way of classifying mental disorders and to the understanding of the neurobiologic phenomena underlying them. It is the purpose of this presentation to discuss these questions and review some of the data, including our own, concerning event-related potentials endophenotypes of psychosis with special focus on the schizophrenia-bipolar dichotomy and present.
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Dias D, Laíns J, Pereira A, Nunes R, Caldas J, Amaral C, Pires S, Costa A, Alves P, Moreira M, Garrido N, Loureiro L. Can we improve gait skills in chronic hemiplegics? A randomised control trial with gait trainer. Eura Medicophys 2007; 43:499-504. [PMID: 18084173] [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: 05/25/2023]
Abstract
AIM Partial body weight support (PBWS) is an accepted treatment for hemiplegic patients. The aim of this study is to compare the efficiency of gait trainer with conventional treatment on the gait management after stroke. METHODS Forty chronic post-stroke hemiplegics were part of a prospective research. Inclusion criteria were: first ever stroke in a chronic stage with stabilised motor deficits; age >18 and <80 years; cognitive and communication skills to understand the treatment; absence of cardiac, psychological and orthopedic contraindications. Patients were randomised into two groups: the control group (CG) that used the Bobath method in 40 minutes sessions, 5 times a week, for 5 weeks, and the experimental group (EG) that used the gait trainer, for the same period of time and frequency. Assessment tools: Motricity Index (MI); Toulouse Motor Scale (TMS); modified Ashworth Spasticity Scale (mASS); Berg Balance Scale (BBS); Rivermead Mobility Index (RMI); Fugl-Meyer Stroke Scale (F-MSS); Functional Ambulation Category (FAC); Barthel Index (BI); 10 meters, time up and go (TUG), 6 minutes, and step tests. EG and CG did the assessments before treatment (T(0)), right after treatment (T(1)), and on follow-up, 3 months later (T(2)). RESULTS CG and EG were homogenous in all the variables at T(0). CG and EG showed improvement in almost all the assessment scales after treatment, although only some with relevant differences. EG showed statistically relevant improvement on T(1) and on T(2) in several of the assessment tools, whereas CG only showed statistically significant improvement after T(1) and only in some of the assessment tools. CONCLUSIONS Both groups of chronic hemiplegic patients improved after either PBWS with gait trainer or Bobath treatment. Only subjects undergoing PBWS with gait trainer maintained functional gain after 3 months.
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Affiliation(s)
- D Dias
- Clinic of Physical Medicine and Rehabilitation, Gouveia, Portugal.
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Abstract
Chemical investigation of a terrestrial lichen has yielded the pulvinic acid derivative pinastric acid (4). The structure of 4 was secured by detailed spectroscopic analysis as well as via a single X-ray diffraction study. This is the first report of the X-ray structure and 2D NMR assignment of pinastric acid (4). Pinastric acid (4) displayed antitumour, antiviral and antimicrobial (both antibacterial and antifungal) activities. Whilst the antiviral and antimicrobial activities are consistent with previous findings of 4 this is the first report of the antitumour properties for the compound.
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Affiliation(s)
- D Dias
- School of Applied Sciences (Discipline of Applied Chemistry), RMIT University, Melbourne, Victoria 3001, Australia
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Boon ME, Duineveld SM, Ouwerkerk-Noordam E, Dias D. Preneoplastic and neoplastic cervical lesions as detected in Cytoblock sections: the importance of sampling women with bleeding symptoms. EUR J GYNAECOL ONCOL 2007; 28:282-6. [PMID: 17713093] [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: 05/16/2023]
Abstract
PURPOSE OF INVESTIGATION The purpose was to use cervical samples to prepare Cytoblocks and use the subsequent paraffin sections for additional immunostaining in our studies on angiogenesis. METHODS Between January and April 2006, 261 women with bleeding complaints were selected of which 85 had gone to their general practitioner (GP) because of postcoital bleeding. The 261 cervical samples were processed by the Shandon Cytoblock Preparation System. On the subsequent prepared Papanicolaou-stained paraffin sections a histological diagnosis was rendered on the minibiopsies. RESULTS In all (pre)invasive cases, the paraffin sections contained numerous cancerous minibiopsies. The (pre)invasive cases had many Ki-67 positive nuclei displaying an S-phase staining pattern. In the Ki-67 stained sections, the glandular architecture of the two AIS cases and the two adenocarcinoma cases was highlighted. CONCLUSION Histologic paraffin sections provided enough minibiopsies to allow concise diagnosis including evaluation of proliferation. Signs of cervical angiogenesis, including postcoital bleeding, can be a strong argument to prepare cytoblocks from samples collected by sampling brushes.
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Affiliation(s)
- M E Boon
- Leiden Cytology and Pathology Laboratoty, Leiden, The Netherlands
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Poller L, Keown M, Chauhan N, van Den Besselaar AMHP, Tripodi A, Jespersen J, Shiach C, Horellou MH, Dias D, Egberg N, Iriarte JA, Kontopoulou-Griva I, Otridge B. European Concerted Action on Anticoagulation (ECAA): multicentre international sensitivity index calibration of two types of point-of-care prothrombin time monitor systems. Br J Haematol 2002; 116:844-50. [PMID: 11886390 DOI: 10.1046/j.0007-1048.2002.03361.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [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: 11/20/2022]
Abstract
A multicentre modified World Health Organization (WHO)-type international sensitivity index (ISI) calibration has been performed at 10 European Concerted Action on Anticoagulation (ECAA) national laboratories using non-citrated whole-blood on two point-of-care test (POCT) prothrombin time (PT) monitor systems, CoaguChek Mini and TAS PT-NC, using single lots of test cards/strips. The relevant species (human and rabbit) WHO international reference preparations (IRPs) were tested with the manual PT technique on citrated plasma from the same blood donations. The ISI was calculated from the slope of the orthogonal regression line relating log PT (POCT) to log PT (IRP). The mean ISI of the CoaguChek Mini system was 1.75 and 1.13 with the prothrombin time non-citrated Thrombolytic Assessment System (TAS PT-NC). With the CoaguChek Mini system, seven out of 10 calibrations exceeded the current 3% WHO recommended limit for the coefficient of variation (CV) of the slope with conventional PT testing, whereas with the TAS PT-NC system, it was eight out of 10. All the POCT calibrations had a CV of the slope <5%. It is suggested that this level of precision be adopted as the limit of acceptability of calibration of these monitor systems. In these circumstances, the modified WHO-type ISI calibration appeared to be satisfactory for the POCT whole-blood monitors.
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Affiliation(s)
- L Poller
- ECAA Central Facility, School of Biological Sciences, The University of Manchester, Manchester, UK.
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Russo AM, Verdino R, Schorr C, Nicholas M, Dias D, Hsia H, Callans D, Marchlinski FE. Occurrence of implantable defibrillator events in patients with syncope and nonischemic dilated cardiomyopathy. Am J Cardiol 2001; 88:1444-6, A9. [PMID: 11741573 DOI: 10.1016/s0002-9149(01)02133-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A M Russo
- University of Pennsylvania Health System, Philadelphia, Pennsylvania, USA.
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Stankovic S, Dias D, Hain M, Bhattacharya S, Glöckner R, Karaboué C, Benmohammadi L, Guessous F, Wang L, Tschudi T, Ferstl M, Pawlowski E, Steingrüber R. Integrated optical pickup system for axial dual focus. Appl Opt 2001; 40:614-621. [PMID: 18357037 DOI: 10.1364/ao.40.000614] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We propose an optical pickup that acquires data from both layers of a dual-layer digital versatile disk simultaneously. An adaptive optical element that uses liquid crystals creates two axial foci separated by a spacing of 55 mum, which is the distance between the two layers. The spacing between the foci can be varied by the adaptive element. The separation of the reflected light into TE and TM polarized light, corresponding to each of the layers, is made by dielectric gratings that are characterized by high aspect ratios. Electron-beam lithography and reactive ion etching techniques were used to produce the submicrometer structures. All fabricated elements were assembled in a pickup system, whose properties were measured.
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Abstract
Conserved genome homologies between the chicken and partridge have been demonstrated for chromosomes 1 and Z in previous studies. Morphological differences between the chicken and partridge for chromosome 4 have also been identified. The chicken chromosome 4 is submetacentric while the partridge chromosome 4 is acrocentric. We now report that in spite of this morphological difference, both species share extensive homology for chromosome 4 as determined by fluorescent in situ hybridization (FISH). Since only two chromosomes of the partridge karyotype showed FISH signals, our observation suggests that a chromosome rearrangement (peri- or paracentric inversion) has occurred in the partridge chromosome 4.
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Affiliation(s)
- P S Ramos
- Department of Animal Science, University of Minnesota, St. Paul, USA
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Hand D, Dias D, Haynes LW. Stabilization of collagen-tailed acetylcholinesterase in muscle cells through extracellular anchorage by transglutaminase-catalyzed cross-linking. Mol Cell Biochem 2000; 204:65-76. [PMID: 10718626 DOI: 10.1023/a:1007068017315] [Citation(s) in RCA: 11] [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] [Indexed: 11/12/2022]
Abstract
A component of collagen-tailed acetylcholinesterase (asymmetric; A-AChE) in muscle forms a metabolically-stable pool which can be released from the cell surface only by collagenase, suggesting that part of the enzyme is covalently bound by its tail (COLQ) subunits. We have investigated whether this insoluble pool forms through covalent cross-linking of A-AChE to extracellular matrix glycoproteins by tissue transglutaminase (Tg; type 2 transglutaminase). Tg catalyzed the incorporation of the polyamine substrate 3[H]-putrescine into the collagen tail of affinity-purified avian A12-AChE. Complexes between A12-AChE and cellular fibronectin were also formed in vitro by Tg. In quail myotubes, retinoic acid, which stimulates the formation of epsilon(gamma-glutamyl)lysine isodipeptide bonds by Tg in myotubes, increased the proportion of extraction-resistant (er) A-AChE. Following irreversible inactivation of AChE by diisopropylfluorophosphate, entry of newly-synthesized A-AChE into the extraction-resistant pool was inhibited by a competitive Tg inactivator RS48373-007. The quantity of exogenously-added A 12 AChE incorporated into the extraction-resistant pool in living myotubes was increased by Tg in the presence of calcium. The inhibition of cross-bridge formation in fibrillar collagen by beta-aminopropionitrile, and pre-exposure of myotubes to a monoclonal antibody to fibronectin, resulted in a reduction in the size of the erA-AChE pool present on the cell-surface. The evidence supports the hypothesis that a component of insoluble collagen-tailed AChE, once subject to clustering influences mediated via reversible docking to proteoglycans and their receptors, is anchored at the cell surface through covalent cross-linking by Tg. The high stability of the epsilon(gamma-glutamyl)lysine isopeptide bond is likely to contribute to the observed low turnover of the erA-AChE fraction.
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Affiliation(s)
- D Hand
- School of Biological Sciences, University of Bristol, UK
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Sá-Leão R, Santos Sanches I, Dias D, Peres I, Barros RM, de Lencastre H. Detection of an archaic clone of Staphylococcus aureus with low-level resistance to methicillin in a pediatric hospital in Portugal and in international samples: relics of a formerly widely disseminated strain? J Clin Microbiol 1999; 37:1913-20. [PMID: 10325346 PMCID: PMC84983 DOI: 10.1128/jcm.37.6.1913-1920.1999] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Close to half of the 878 methicillin-resistant Staphylococcus aureus (MRSA) strains recovered between 1992 and 1997 from the pediatric hospital in Lisbon were bacteria in which antibiotic resistance was limited to beta-lactam antibiotics. The other half were multidrug resistant. The coexistence of MRSA with such unequal antibiotic resistance profiles prompted us to use molecular typing techniques for the characterization of the MRSA strains. Fifty-three strains chosen randomly were typed by a combination of genotypic methods. Over 90% of the MRSA strains belonged to two clones: the most frequent one, designated the "pediatric clone," was reminiscent of historically "early" MRSA: most isolates of this clone were only resistant to beta-lactam antimicrobials and remained susceptible to macrolides, quinolones, clindamycin, spectinomycin, and tetracycline. They showed heterogeneous and low-level resistance to methicillin (MIC, 1.5 to 6 microg/ml), carried the ClaI-mecA polymorph II, were free of the transposon Tn554, and showed macrorestriction pattern D (clonal type II::NH::D). The second major clone was the internationally spread and multiresistant "Iberian" MRSA with homogeneous and high-level resistance to methicillin (MIC, >200 microg/ml) and clonal type I::E::A. Surprisingly, the multidrug-resistant and highly epidemic Iberian MRSA did not replace the much less resistant pediatric clone during the 6 years of surveillance. The pediatric clone was also identified among contemporary MRSA isolates from Poland, Argentina, The United States, and Colombia, and the overwhelming majority of these were also associated with pediatric settings. We propose that the pediatric MRSA strain represents a formerly widely spread archaic clone which survived in some epidemiological settings with relatively limited antimicrobial pressure.
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Affiliation(s)
- R Sá-Leão
- Molecular Genetics Unit, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
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De Souza JV, Dias D. Neuroleptic malignant syndrome - a case report. Indian J Psychiatry 1986; 28:259-60. [PMID: 21927186 PMCID: PMC3172541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- J V De Souza
- Lecturer, Institute of Psychiatry and Human Behaviour, Altinbo, Panaji, (Goa)
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Dias D. [Removable bridges, general considerations on their use]. Odontol Atual 1968; 1:16-22. [PMID: 5251631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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