1
|
Jacobs EJ, Aycock KN, Santos PP, Tuohy JL, Davalos RV. Rapid estimation of electroporation-dependent tissue properties in canine lung tumors using a deep neural network. Biosens Bioelectron 2024; 244:115777. [PMID: 37924653 DOI: 10.1016/j.bios.2023.115777] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/08/2023] [Accepted: 10/20/2023] [Indexed: 11/06/2023]
Abstract
The efficiency of electroporation treatments depends on the application of a critical electric field over the targeted tissue volume. Both the electric field and temperature distribution strongly depend on the tissue-specific electrical properties, which both differ between patients in healthy and malignant tissues and change in an electric field-dependent manner from the electroporation process itself. Therefore, tissue property estimations are paramount for treatment planning with electroporation therapies. Ex vivo methods to find electrical tissue properties often misrepresent the targeted tissue, especially when translating results to tumors. A voltage ramp is an in situ method that applies a series of increasing electric potentials across treatment electrodes and measures the resulting current. Here, we develop a robust deep neural network, trained on finite element model simulations, to directly predict tissue properties from a measured voltage ramp. There was minimal test error (R2>0.94;p<0.0001) in three important electric tissue properties. Further, our model was validated to correctly predict the complete dynamic conductivity curve in a previously characterized ex vivo liver model (R2>0.93;p<0.0001) within 100 s from probe insertion, showing great utility for a clinical application. Lastly, we characterize the first reported electrical tissue properties of lung tumors from five canine patients (R2>0.99;p<0.0001). We believe this platform can be incorporated prior to treatment to quickly ascertain patient-specific tissue properties required for electroporation treatment planning models or real-time treatment prediction algorithms. Further, this method can be used over traditional ex vivo methods for in situ tissue characterization with clinically relevant geometries.
Collapse
Affiliation(s)
- Edward J Jacobs
- Department of Biomedical Engineering and Mechanics, Virginia Tech and Wake Forest University, Blacksburg, VA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Tech and Emory University, Atlanta, GA, USA.
| | - Kenneth N Aycock
- Department of Biomedical Engineering and Mechanics, Virginia Tech and Wake Forest University, Blacksburg, VA, USA
| | - Pedro P Santos
- Department of Biomedical Engineering and Mechanics, Virginia Tech and Wake Forest University, Blacksburg, VA, USA; Department of Electrical Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Joanne L Tuohy
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, USA
| | - Rafael V Davalos
- Department of Biomedical Engineering and Mechanics, Virginia Tech and Wake Forest University, Blacksburg, VA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Tech and Emory University, Atlanta, GA, USA
| |
Collapse
|
2
|
Cunha PJ, Duran FLS, de Oliveira PA, Chaim-Avancini TM, Milioni ALV, Ometto M, Squarzoni P, Santos PP, Caetano SC, Busatto GF, Scivoletto S. Callosal abnormalities, altered cortisol levels, and neurocognitive deficits associated with early maltreatment among adolescents: A voxel-based diffusion-tensor imaging study. Brain Behav 2021; 11:e02009. [PMID: 33452751 PMCID: PMC7994704 DOI: 10.1002/brb3.2009] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 11/21/2020] [Accepted: 11/28/2020] [Indexed: 01/19/2023] Open
Abstract
INTRODUCTION Neuroimaging studies have shown callosal abnormalities among maltreated subjects, but little is known about the functional and neurobiological correlates of these supposed developmental alterations. The aim of this study was to investigate childhood maltreatment (CM), neurocognitive functioning, cortisol levels, and corpus callosum (CC) integrity among adolescents. METHODS One hundred and seven subjects underwent magnetic resonance imaging (MRI) with voxel-based diffusion-tensor imaging (DTI) and the Crossed Finger Localization Test (CFLT). Psychopathology was investigated with the Schedule for Affective Disorders and Schizophrenia (K-SADS-PL); CM was detailed by the Childhood Trauma Questionnaire (CTQ), and salivary cortisol levels were measured by immunoassay. RESULTS Higher levels of CM were associated with current lower CFLT scores, mainly in the CROSSED condition, involving interhemispheric communication of sensorimotor information (p < .05) and with reduced fractional anisotropy (FA) in the splenium of the CC (p < .01). Deficits in the CFLT were also associated with higher cortisol levels (p < .05). CONCLUSION The association among CM, neuropsychological abnormalities, callosal microstructure alterations, and cortisol levels suggests an altered pattern of brain interhemispheric connectivity among maltreated adolescents. Further studies are needed to investigate the extent to which these sensorimotor deficits and abnormal cortisol levels may be possible mediators of negative neurodevelopmental trajectories and adult psychopathology.
Collapse
Affiliation(s)
- Paulo Jannuzzi Cunha
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Fabio L S Duran
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Paula Approbato de Oliveira
- Departamento e Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Tiffany M Chaim-Avancini
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Ana Luiza V Milioni
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Mariella Ometto
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Paula Squarzoni
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Pedro P Santos
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Sheila C Caetano
- Departamento de Psiquiatria, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - Geraldo F Busatto
- Laboratory of Psychiatric Neuroimaging (LIM-21), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Sandra Scivoletto
- Departamento e Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| |
Collapse
|
3
|
Pereira S, Santos PP, Zêzere JL, Tavares AO, Garcia RAC, Oliveira SC. A landslide risk index for municipal land use planning in Portugal. Sci Total Environ 2020; 735:139463. [PMID: 32492571 DOI: 10.1016/j.scitotenv.2020.139463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 03/05/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
In Portugal landslides caused 237 fatalities and >1600 displaced people in the period 1865-2015. Spatial distribution and temporal patterns of slope instability can be related with a complex set of natural and human factors responsible for generating damages. It is essential to develop new methodologies to synthetize risk dimensions to contribute to the landslide risk management at the municipal level. This work proposed a municipal landslide risk index (LRI) considering three risk dimensions: hazard, exposure and physical vulnerability of buildings. The hazard dimension includes the landslide susceptibility performed at the national scale, the probability of weather types associated with landslides and an extreme precipitation susceptibility index. The exposure dimension considered the population density and the number of buildings, whereas the average physical vulnerability of the buildings was computed using four statistical variables from the official census: (i) construction technique and construction materials; (ii) reinforced structure; (iii) number of floors; and (iv) conservation status. Each variable includes different classes that were empirically weighted. After evaluating the three risk dimensions and the LRI, a cluster analysis was performed in order to identify the most important landslide risk drivers in each municipality. Exposure is the main driving force of LRI in the metropolitan areas of Lisbon and Porto, while the hazard is more relevant in the NW municipalities and the physical vulnerability is the major driving force in the south of the country. This methodological approach contributes to a comprehensive and synthetized knowledge about the landslide risk driving forces within the 278 Portuguese municipalities. In addition, it contributes to the diversification and context-oriented strategies of landslide risk management that still lacks in most of the national-level risk governance processes. Finally, this methodology can be generalized to other geographical contexts, improving the risk management, land use planning and the disaster risk reduction.
Collapse
Affiliation(s)
- S Pereira
- Centre for Geographical Studies, IGOT, Universidade de Lisboa, Rua Branca Edmée Marques, Cidade Universitária, 1600-276 Lisboa, Portugal.
| | - P P Santos
- Centre for Geographical Studies, IGOT, Universidade de Lisboa, Rua Branca Edmée Marques, Cidade Universitária, 1600-276 Lisboa, Portugal
| | - J L Zêzere
- Centre for Geographical Studies, IGOT, Universidade de Lisboa, Rua Branca Edmée Marques, Cidade Universitária, 1600-276 Lisboa, Portugal
| | - A O Tavares
- Earth Sciences Department and Centre for Social Studies, Universidade de Coimbra, Rua Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
| | - R A C Garcia
- Centre for Geographical Studies, IGOT, Universidade de Lisboa, Rua Branca Edmée Marques, Cidade Universitária, 1600-276 Lisboa, Portugal
| | - S C Oliveira
- Centre for Geographical Studies, IGOT, Universidade de Lisboa, Rua Branca Edmée Marques, Cidade Universitária, 1600-276 Lisboa, Portugal
| |
Collapse
|
4
|
Melo R, Zêzere JL, Oliveira SC, Garcia RAC, Oliveira S, Pereira S, Piedade A, Santos PP, van Asch TWJ. Defining evacuation travel times and safety areas in a debris flow hazard scenario. Sci Total Environ 2020; 712:136452. [PMID: 31931203 DOI: 10.1016/j.scitotenv.2019.136452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/14/2019] [Accepted: 12/30/2019] [Indexed: 06/10/2023]
Abstract
Debris flows are one of the most hazardous types of landslides in mountain regions. In the upper part of the Zêzere valley (Serra da Estrela, Portugal) several debris flows events occurred in the last 200 years, some of them causing loss of lives and material damages. In this work, a methodology for pedestrian evacuation modelling, in a debris flow hazard scenario, was implemented. A dynamic run-out model, developed in previous studies, was used to evaluate the debris flows velocities, thickness of the deposits and extent of the mobilized material. The buildings potentially affected by the impact of debris flows were identified and the potentially exposed population was estimated by applying a dasymetric distribution. The results lead to the conclusion that, in the study area, the elderly are those who are most exposed to debris flows. Furthermore, the time lapse between the debris flows initiation and the arrival at the buildings at risk was estimated, allowing to account for the overall number of buildings where the evacuation time takes longer than the debris flows arrival. Additionally, the safe areas within the study area were identified, and several safe public buildings with the capacity to gather a large number of persons were selected. Considering that the study area is located in a mountain region, characterized by steep slopes, the evacuation modelling was performed based on an anisotropic approach, in order to consider the influence of slope direction on travel costs. At the end, three pedestrian evacuation travel time scenarios, based on different walking speeds to accommodate residents with different ages in safer places, were compared and the results mapped. The implemented methodology is not local dependent, which allows its reproduction elsewhere.
Collapse
Affiliation(s)
- R Melo
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal.
| | - J L Zêzere
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal
| | - S C Oliveira
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal
| | - R A C Garcia
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal
| | - S Oliveira
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal
| | - S Pereira
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal
| | - A Piedade
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal; Centre for Informatics and Systems, Universidade de Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-290 Coimbra, Portugal
| | - P P Santos
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Edifício IGOT, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal
| | - T W J van Asch
- Faculty of Geosciences, Utrecht University Princeton 8a, 3584 CB Utrecht, the Netherlands; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| |
Collapse
|
5
|
Faria DDP, Duran FL, Squarzoni P, Coutinho AM, Garcez AT, Santos PP, Brucki SM, de Oliveira MO, Trés ES, Forlenza OV, Nitrini R, Buchpiguel CA, Busatto Filho G. Topography of 11C-Pittsburgh compound B uptake in Alzheimer's disease: a voxel-based investigation of cortical and white matter regions. ACTA ACUST UNITED AC 2018; 41:101-111. [PMID: 30540022 PMCID: PMC6781685 DOI: 10.1590/1516-4446-2017-0002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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: 12/13/2017] [Accepted: 07/06/2018] [Indexed: 01/09/2023]
Abstract
Objective: To compare results of positron emission tomography (PET) with carbon-11-labeled Pittsburgh compound B (11C-PIB) obtained with cerebellar or global brain uptake for voxel intensity normalization, describe the cortical sites with highest tracer uptake in subjects with mild Alzheimer’s disease (AD), and explore possible group differences in 11C-PIB binding to white matter. Methods: 11C-PIB PET scans were acquired from subjects with AD (n=17) and healthy elderly controls (n=19). Voxel-based analysis was performed with statistical parametric mapping (SPM). Results: Cerebellar normalization showed higher 11C-PIB uptake in the AD group relative to controls throughout the cerebral cortex, involving the lateral temporal, orbitofrontal, and superior parietal cortices. With global uptake normalization, greatest cortical binding was detected in the orbitofrontal cortex; decreased 11C-PIB uptake in white matter was found in the posterior hippocampal region, corpus callosum, pons, and internal capsule. Conclusion: The present case-control voxelwise 11C-PIB PET comparison highlighted the regional distribution of amyloid deposition in the cerebral cortex of mildly demented AD patients. Tracer uptake was highest in the orbitofrontal cortex. Decreased 11C-PIB uptake in white-matter regions in this patient population may be a marker of white-matter damage in AD.
Collapse
Affiliation(s)
- Daniele de P Faria
- Laboratório de Medicina Nuclear (LIM 43), Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil.,Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil
| | - Fabio L Duran
- Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil.,Laboratório de Neuroimagem em Psiquiatria (LIM 21), Departamento de Psiquiatria, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Paula Squarzoni
- Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil.,Laboratório de Neuroimagem em Psiquiatria (LIM 21), Departamento de Psiquiatria, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Artur M Coutinho
- Laboratório de Medicina Nuclear (LIM 43), Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil.,Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil
| | - Alexandre T Garcez
- Laboratório de Medicina Nuclear (LIM 43), Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil.,Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil
| | - Pedro P Santos
- Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil.,Laboratório de Neuroimagem em Psiquiatria (LIM 21), Departamento de Psiquiatria, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Sonia M Brucki
- Departamento de Neurologia, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Maira O de Oliveira
- Departamento de Neurologia, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Eduardo S Trés
- Departamento de Neurologia, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Orestes V Forlenza
- Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil.,Laboratório de Neurociências (LIM 27), Departamento de Psiquiatria, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Ricardo Nitrini
- Departamento de Neurologia, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| | - Carlos A Buchpiguel
- Laboratório de Medicina Nuclear (LIM 43), Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil.,Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil
| | - Geraldo Busatto Filho
- Núcleo de Apoio à Pesquisa em Neurociência Aplicada (NAPNA), USP, São Paulo, SP, Brazil.,Laboratório de Neuroimagem em Psiquiatria (LIM 21), Departamento de Psiquiatria, Faculdade de Medicina, USP, São Paulo, SP, Brazil
| |
Collapse
|
6
|
Santos PP, Silveira PSD, Souza-Duran FL, Tamashiro-Duran JH, Scazufca M, Menezes PR, Leite CDC, Lotufo PA, Vallada H, Wajngarten M, De Toledo Ferraz Alves TC, Rzezak P, Busatto GF. Prefrontal-Parietal White Matter Volumes in Healthy Elderlies Are Decreased in Proportion to the Degree of Cardiovascular Risk and Related to Inhibitory Control Deficits. Front Psychol 2017; 8:57. [PMID: 28184203 PMCID: PMC5266720 DOI: 10.3389/fpsyg.2017.00057] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 01/10/2017] [Indexed: 01/05/2023] Open
Abstract
Cardiovascular risk (CVR) factors may be associated with poor cognitive functioning in elderlies and impairments in brain structure. Using MRI and voxel-based morphometry (VBM), we assessed regional white matter (WM) volumes in a population-based sample of individuals aged 65–75 years (n = 156), subdivided in three CVR subgroups using the Framingham Risk Score. Cognition was assessed using the Short Cognitive Performance Test. In high-risk subjects, we detected significantly reduced WM volume in the right juxtacortical dorsolateral prefrontal region compared to both low and intermediate CVR subgroups. Findings remained significant after accounting for the presence of the APOEε4 allele. Inhibitory control performance was negatively related to right prefrontal WM volume, proportionally to the degree of CVR. Significantly reduced deep parietal WM was also detected bilaterally in the high CVR subgroup. This is the first large study documenting the topography of CVR-related WM brain volume deficits. The significant association regarding poor response inhibition indicates that prefrontal WM deficits related to CVR are clinically meaningful, since inhibitory control is known to rely on prefrontal integrity.
Collapse
Affiliation(s)
- Pedro P Santos
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil
| | - Paula S Da Silveira
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil
| | - Fabio L Souza-Duran
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil
| | - Jaqueline H Tamashiro-Duran
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil
| | - Márcia Scazufca
- Department and Institute of Psychiatry, University of São Paulo São Paulo, Brazil
| | - Paulo R Menezes
- Department of Preventive Medicine, Faculty of Medicine, University of São PauloSão Paulo, Brazil; Center of Research in Mental Health Population, University of São PauloSão Paulo, Brazil
| | - Claudia Da Costa Leite
- Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil; Laboratory of Magnetic Resonance in Neuroradiology, Institute and Department of Radiology, University of São PauloSão Paulo, Brazil
| | - Paulo A Lotufo
- Department of Internal Medicine, Center for Clinical and Epidemiologic Research, University of São Paulo São Paulo, Brazil
| | - Homero Vallada
- Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil; Department and Institute of Psychiatry, University of São PauloSão Paulo, Brazil
| | - Maurício Wajngarten
- Department of Cardiopneumology, Heart Institute, General Hospital of University of São Paulo Medical School São Paulo, Brazil
| | - Tânia C De Toledo Ferraz Alves
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil
| | - Patricia Rzezak
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil; Laboratory of Clinical Neurophysiology, Institute of Psychiatry, University of São Paulo Medical School (IPq-HC-FMUSP)São Paulo, Brazil
| | - Geraldo F Busatto
- Laboratory of Psychiatric Neuroimaging, Institute and Department of Psychiatry, Universidade de São PauloSão Paulo, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São PauloSão Paulo, Brazil
| |
Collapse
|
7
|
Abstract
Social impacts caused by floods and landslides in Portugal in the period of 1865-2010 are gathered in the DISASTER database. This database contains 1,902 hydro-geomorphologic cases that caused 1,248 fatalities (81% and 19% associated with floods and landslides, respectively). The use of the DISASTER database allowed for: (i) the analysis of the frequency and the temporal evolution of fatal floods and landslides; (ii) the analysis of the spatio-temporal distribution of fatalities; (iii) the identification of the most deadly flood and landside types; (iv) the verification of gender tendencies in mortalities; and (v) the evaluation of individual and societal risk. The highest number of flood and landslide cases and related mortalities occurred in the period of 1935-1969. After this period, the number of flood and landslide mortalities decreased, although landslide fatalities remained higher than those registered in the period of 1865-1934. The occurrence of flood fatalities was widespread in the country, with an important cluster in the Lisbon region and in the Tagus valley, while fatalities caused by landslides mainly occurred in the north of the Tagus valley. Flash floods caused the majority of fatalities associated with floods, while falls and flows were responsible for the highest number of fatalities associated with landslides. Males were found to have the highest frequency of fatalities. In the case of floods, the majority of fatalities were found both outdoors and inside of buildings in rural areas while fatalities inside buildings were dominant in landslide cases, mostly in rural areas.
Collapse
Affiliation(s)
- S Pereira
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Lisboa, Portugal
| | - J L Zêzere
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Lisboa, Portugal
| | - I Quaresma
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Lisboa, Portugal
| | - P P Santos
- CES, Universidade de Coimbra, Coimbra, Portugal
| | - M Santos
- Centre for Geographical Studies, Institute of Geography and Spatial Planning, Universidade de Lisboa, Lisboa, Portugal
- CEGOT, Universidade do Porto, Porto, Portugal
| |
Collapse
|
8
|
Harjivan SG, Pinheiro PF, Martins IL, Godinho AL, Wanke R, Santos PP, Pereira SA, Beland FA, Marques MM, Antunes AMM. Quinoid derivatives of the nevirapine metabolites 2-hydroxy- and 3-hydroxy-nevirapine: activation pathway to amino acid adducts. Toxicol Res (Camb) 2015. [DOI: 10.1039/c5tx00176e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Quinoid electrophiles from the nevirapine metabolites, 2-OH- and 3-OH-nevirapine, react with nitrogen-based bionucleophiles yielding covalent adducts.
Collapse
|
9
|
Antunes AMM, Sidarus M, Novais DA, Harjivan SG, Santos PP, Ferreira da Silva JL, Beland FA, Marques MM. Oxidation of 2-hydroxynevirapine, a phenolic metabolite of the anti-HIV drug nevirapine: evidence for an unusual pyridine ring contraction. Molecules 2012; 17:2616-27. [PMID: 22391597 PMCID: PMC6268841 DOI: 10.3390/molecules17032616] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Revised: 02/18/2012] [Accepted: 02/27/2012] [Indexed: 11/16/2022] Open
Abstract
Nevirapine (NVP) is an anti-HIV drug associated with severe hepatotoxicity and skin rashes, which raises concerns about its chronic administration. There is increasing evidence that metabolic activation to reactive electrophiles capable of reacting with bionucleophiles is likely to be involved in the initiation of these toxic responses. Phase I NVP metabolism involves oxidation of the 4-methyl substituent and the formation of phenolic derivatives that are conceivably capable of undergoing further metabolic oxidation to electrophilic quinoid species prone to react with bionucleophiles. The covalent adducts thus formed might be at the genesis of toxic responses. As part of a program aimed at evaluating the possible contribution of quinoid derivatives of Phase I phenolic NVP metabolites to the toxic responses elicited by the parent drug, we have investigated the oxidation of 2-hydroxy-NVP with dipotassium nitroso-disulfonate (Frémy's salt), mimicking the one-electron oxidation involved in enzyme-mediated metabolic oxidations. We report herein the isolation and full structural characterization of a 1H-pyrrole-2,5-dione derivative as a major product, stemming from an unusual pyridine ring contraction.
Collapse
Affiliation(s)
- Alexandra M M Antunes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa 1049-001, Portugal.
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Antunes AMM, Novais DA, da Silva JLF, Santos PP, Oliveira MC, Beland FA, Marques MM. Synthesis and oxidation of 2-hydroxynevirapine, a metabolite of the HIV reverse transcriptase inhibitor nevirapine. Org Biomol Chem 2011; 9:7822-35. [PMID: 21969039 DOI: 10.1039/c1ob06052j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Alexandra M M Antunes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001, Lisboa, Portugal.
| | | | | | | | | | | | | |
Collapse
|
11
|
Antunes AMM, Duarte MP, Santos PP, Gamboa da Costa G, Heinze TM, Beland FA, Marques MM. Synthesis and Characterization of DNA Adducts from the HIV Reverse Transcriptase Inhibitor Nevirapine. Chem Res Toxicol 2008; 21:1443-56. [DOI: 10.1021/tx8000972] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Alexandra M. M. Antunes
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| | - Mariana P. Duarte
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| | - Pedro P. Santos
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| | - Gonçalo Gamboa da Costa
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| | - Thomas M. Heinze
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| | - Frederick A. Beland
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| | - M. Matilde Marques
- REQUIMTE/CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal, and Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
| |
Collapse
|
12
|
Veasey EA, Karasawa MG, Santos PP, Rosa MS, Mamani E, Oliveira GCX. Variation in the loss of seed dormancy during after-ripening of wild and cultivated rice species. Ann Bot 2004; 94:875-82. [PMID: 15471820 PMCID: PMC4242282 DOI: 10.1093/aob/mch215] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
BACKGROUND AND AIMS The aim of this paper was to verify the variation in the loss of seed dormancy during after-ripening and the interspecific and interpopulation variability in the degree of dormancy of seven wild and two cultivated rice species comprising 21 populations and two cultivars. METHODS Four wild rice species from South America, Oryza glumaepatula, O. latifolia, O. grandiglumis and O. alta, and two O. sativa cultivars were tested in one experiment. In a second experiment, five wild species, O. punctata, O. eichingeri, O.rufipogon, O. latifolia and O. glumaepatula, and one cultivated species (O. glaberrima) were evaluated. Initial germination tests were performed soon after the seeds were harvested and subsequently at 2-month intervals, for a total of six storage periods in the first experiment and three in the second. All tests were conducted in the dark at a temperature of 27 degrees C. KEY RESULTS Different patterns of after-ripening among populations within and between species were observed. CONCLUSIONS The cultivated species (O. sativa and O. glaberrima) and, amongst the wild species, the tetraploids O. latifolia, O. grandiglumis and the diploids O. eichingeri and O. punctata, had weak dormancy, losing it completely 2 months after harvest, while O. rufipogon and O. glumaepatula exhibited pronounced dormancy. The latter showed different patterns of after-ripening between populations indigenous to the Amazon region and those originating in the Paraguay River system. Seeds of Solimoes (Amazon) and Japura origin showed weak dormancy whereas those of Paraguay origin showed deep dormancy. Ecological differences among natural habitats may be involved in such differentiation.
Collapse
Affiliation(s)
- E A Veasey
- Genetics Department, Escola Superior de Agricultura Luiz de Queiroz, University of São Paulo, Caixa Postal 83, 13400-970, Piracicaba, SP, Brazil.
| | | | | | | | | | | |
Collapse
|
13
|
Gregianin LJ, Brunetto AL, Di Leone L, Costa TD, Santos PP, Schwartsmann G. Clinical and pharmacokinetic study of fractionated doses of oral etoposide in pediatric patients with advanced malignancies. Med Sci Monit 2002; 8:PI70-7. [PMID: 12218955] [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: 02/26/2023] Open
Abstract
BACKGROUND The purpose of this phase I study was to evaluate the toxicity profile, dose-limiting toxicities (DLT), maximum tolerated dose (MTD), and plasma pharmacokinetics of oral etoposide, and to recommend a safe fractionated dose for phase II trials in pediatric patients with refractory solid tumors. MATERIAL/METHODS All patients had tumors no longer amenable to established forms of treatment. The initial dose of etoposide was 20 mg/m(2) TID for 14 days every 21 days (dose-level I). Etoposide plasma pharmacokinetics were studied on day 1 of treatment and determined by HPLC. RESULTS Seventeen children were enrolled, 13 of whom were included in the pharmacokinetic study, for a total of 64 courses. Nine patients were included at dose-level I; grade 2-3 leucopenia was observed in 5. The dose was then raised to 25 mg/m(2) (dose-level II) in another 8 patients; grade 3-4 leucopenia was observed in 4. This dose-level was therefore considered the MTD. The DLT was neutropenia. In patients at dose-level I and II the maximum plasma etoposide concentration was 2.97 and 8.59 mg/ml, respectively. Drug levels > 1 microg/ml were maintained for about 6.3 hours following drug administration at both dose-levels. Partial response was observed in 1 patient and 4 patients showed stable disease. CONCLUSIONS Prolonged oral etoposide was well tolerated by our patients. Considering the MTD, and the fact that the patients included at dose-level I achieved an adequate (>1 microg/ml) plasma concentration of etoposide for a sufficient time, this dose level was recommended for phase II studies in pediatric malignancies.
Collapse
Affiliation(s)
- Lauro J Gregianin
- Pediatric Oncology Service, Hospital de Clínicas de Porto Alegre, Brazil.
| | | | | | | | | | | |
Collapse
|