12 research outputs found
Caractérisation des inégalités environnementales liées aux Hydrocarbure Aromatique Polycyclique en France : développement de méthodes de traitement des données environnementales pour la spatialisation des indicateurs d'exposition aux substances HAP
Reducing environmental exposure inequalities has become a major focus of public health efforts in France, as evidenced by the French action plans for health and the environment. The aim of this thesis is to develop an integrated approach to characterize environmental inequalities and evaluate the spatialized exposure to PAH in France.The data produced as part of the monitoring quality networks of environmental media reflect the actual contamination of the environment and the overall exposure of the populations. However they do not always provide an adequate spatial resolution to characterize environmental exposures as they are usually not assembled for this specific purpose. Statistical methods are employed to process input databases (environmental concentrations in water, air and soil) in the objective of characterizing the exposure. A multimedia model interfaced with a GIS, allows the integration of environmental variables in order to yield exposure doses related to ingestion of food, water and soil as well as atmospheric contaminants' inhalation.The methodology was applied to three Polycyclic Aromatic Hydrocarbon substances, (benzo[a]pyrene, benzo[ghi]perylene and indeno[1,2,3-cd]pyrene), in France. The results obtained, allowed to map exposure indicators and to identify areas of overexposure and characterize environmental determinants. In the context of exposure characterization, the direct spatialization of available data from environmental measurement datasets poses a certain number of methodological questions which lead to uncertainties related to the sampling and the spatial and temporal representativeness of data. These could be reduced by acquiring additional data or by constructing predictive variables for the spatial and temporal phenomena considered.Data processing algorithms and calculation of exposure carried out in this work, will be integrated in the French coordinated integrated environment and health platform-PLAINE in order to be applied on other pollutants and prioritize preventative actions.La rĂ©duction des inĂ©galitĂ©s dâexposition environnementale constitue un axe majeur en santĂ© publique en France comme en tĂ©moignent les prioritĂ©s des diffĂ©rents Plan Nationaux SantĂ© Environnement (PNSE). Lâobjectif de cette thĂšse est de dĂ©velopper une approche intĂ©grĂ©e pour la caractĂ©risation des inĂ©galitĂ©s environnementales et lâĂ©valuation de lâexposition spatialisĂ©e de la population aux HAP en France.Les donnĂ©es produites dans le cadre des rĂ©seaux de surveillance de la qualitĂ©s des milieux environnementaux sont le reflet de la contamination rĂ©elle des milieux et de lâexposition globale des populations. Toutefois, elles ne prĂ©sentent gĂ©nĂ©ralement pas une reprĂ©sentativitĂ© spatiale suffisante pour caractĂ©riser finement les expositions environnementales, ces rĂ©seaux nâayant pas Ă©tĂ© initialement conçus dans cet objectif. Des mĂ©thodes statistiques sont dĂ©veloppĂ©es pour traiter les bases de donnĂ©es dâentrĂ©e (concentrations environnementales dans lâeau, lâair et le sol) et les rendre pertinentes vis Ă vis des objectifs dĂ©finis de caractĂ©risation de lâexposition. Un modĂšle multimĂ©dia dâexposition, interfacĂ© avec un SystĂšme dâInformation GĂ©ographique pour intĂ©grer les variables environnementales, est dĂ©veloppĂ© pour estimer les doses dâexposition liĂ©es Ă lâingestion dâaliments, dâeau de consommation, de sol et Ă lâinhalation de contaminants atmosphĂ©riques. La mĂ©thodologie a Ă©tĂ© appliquĂ©e pour trois Hydrocarbures Aromatiques Polycycliques (benzo[a]pyrĂšne, benzo[ghi]pĂ©rylĂšne et indĂ©no[1,2,3-cd]pyrĂšne) sur lâensemble du territoire français. Les rĂ©sultats permettent de cartographier des indicateurs dâexposition, dâidentifier les zones de surexposition et de caractĂ©riser les dĂ©terminants environnementaux. Dans une logique de caractĂ©risation de lâexposition, la spatialisation des donnĂ©es issues des mesures environnementales pose un certain nombre de questions mĂ©thodologiques qui confĂšrent aux cartes rĂ©alisĂ©es de nombreuses incertitudes et limites relatives Ă lâĂ©chantillonnage et aux reprĂ©sentativitĂ©s spatiales et temporelles des donnĂ©es. Celles-ci peuvent ĂȘtre rĂ©duites par lâacquisition de donnĂ©es supplĂ©mentaires et par la construction de variables prĂ©dictives des phĂ©nomĂšnes spatiaux et temporels considĂ©rĂ©s.Les outils de traitement statistique de donnĂ©es dĂ©veloppĂ©s dans le cadre de ces travaux seront intĂ©grĂ©s dans la plateforme PLAINE pour ĂȘtre dĂ©clinĂ©s sur dâautres polluants en vue de prioriser les mesures de gestion Ă mettre en Ćuvre
Ăvaluation des risques cumulatifs en Lorraine : un cadre de travail pour caractĂ©riser les inĂ©galitĂ©s environnementales
International audienceThe study explores spatial data processing methods and the associated impact on the characterization and quantification of a combined health risk indicator at a regional scale with fine resolution. To illustrate the methodology of combining multiple publicly available data sources, we present a case study of the Lorraine region (France), where regional stakeholders were involved in the global procedures for data collection and data processing. Different indicators are developed by combining technical approaches for assessing and characterizing human health exposure to chemical substances (in soil, air and water) and noise risk factors. The results allow identification of pollutant sources, determinants of exposure, and potential hotspot areas. A test of the modelâs assumptions to changes in sub-indicator spatial distribution showed the impact of data transformation on identifying more impacted areas. Cumulative risk assessment enable the combination of quantitative and qualitative evaluation of health risks by including stakeholders in the decision process, helping to define a subjective conceptual analysis framework or assumptions when uncertainties or knowledge gaps exist.Le Plan national santĂ© environnement (PNSE) vise Ă prendre en compte, de façon pĂ©renne, la santĂ© environnementale dans les politiques publiques. Ainsi, les actions des PNSE sont dĂ©veloppĂ©es selon deux axes structurants : âą rĂ©duire les expositions responsables de pathologies Ă fort impact sur la santĂ© ; âą rĂ©duire les inĂ©galitĂ©s environnementales
Cumulative risk assessment in the Lorraine region : a framework to characterize environmental health inequalities
International audienceThe study explores spatial data processing methods and the associated impact on the characterization and quantification of a combined health risk indicator at a regional scale and at fine resolution. To illustrate the methodology of combining multiple publicly available data sources, we present a case study of the Lorraine region (France), where regional stakeholders were involved in the global procedures for data collection and organization. Different indicators are developed by combining technical approaches for assessing and characterizing human health exposure to chemical substances (in soil, air and water) and noise risk factors. The results permit identification of pollutant sources, determinants of exposure, and potential hotspot areas. A test of the modelâs assumptions to changes in sub-indicator spatial distribution showed the impact of data transformation on identifying more impacted areas. Cumulative risk assessment permits the combination of quantitative and qualitative evaluation of health risks by including stakeholders in the decision process, helping to define a subjective conceptual analysis framework or assumptions when uncertainties or knowledge gaps operate
Smoking and Obstructive Sleep Apnea: Is There An Association between These Cardiometabolic Risk Factors?âGender Analysis
Background and Objectives: Studies have tried to establish a relationship between Obstructive Sleep Apnea syndrome (OSA) and smoking but data still remain controversial. We aimed: 1. To evaluate the relationship between smoking and OSA; 2. To explore potential differences according to gender, and 3. To analyze the prevalence of cardiovascular disease (CVD) co-morbidities according to gender and smoking status. Materials and Methods: This retrospective study included 3791 (70.6% males) adult patients who visited a Sleep Clinic. All participants underwent nocturnal polysomnography. Daytime somnolence and insomnia were assessed by using the Epworth Sleepiness Scale (ESS) and the Athens Insomnia Scale (AIS). Ever-smokers completed the Fagerstrom Test for Nicotine Dependence (FTND). Results: OSA was confirmed in 72.1% of participants with 62.2% suffering from moderate-to-severe disease. The number of cigarettes/day, Pack/Years, and FTND were significantly higher in patients with more severe OSA. The prevalence of current smokers was higher in those without OSA or with mild disease, whereas the prevalence of former smokers was higher in moderate and severe OSA. In univariate analysis, current smokers were found to be 1.2 times more likely to have OSA compared with never and former smokers combined and former smokers 1.49 times more likely compared with never smokers. In the multiple regression analysis, after adjusting for BMI, gender, age and number of alcoholic drinks per week, smoking was not found to be significantly associated with OSA. In gender stratified multivariate analyses, no significant associations were observed. CVD co-morbidities were more frequent in more severe OSA. Hypertension, coronary disease and diabetes were more prevalent in former smokers with AHI â„ 15, compared with current smokers, especially in men. Conclusions: Even if an independent effect of smoking on OSA was not found, the number of cigarettes/day, Pack/Years, and FTND were higher in patients with more severe OSA with more prevalent CVD co-morbidities
Smoking and Obstructive Sleep Apnea: Is There An Association between These Cardiometabolic Risk Factors?âGender Analysis
Background and Objectives: Studies have tried to establish a relationship between Obstructive Sleep Apnea syndrome (OSA) and smoking but data still remain controversial. We aimed: 1. To evaluate the relationship between smoking and OSA; 2. To explore potential differences according to gender, and 3. To analyze the prevalence of cardiovascular disease (CVD) co-morbidities according to gender and smoking status. Materials and Methods: This retrospective study included 3791 (70.6% males) adult patients who visited a Sleep Clinic. All participants underwent nocturnal polysomnography. Daytime somnolence and insomnia were assessed by using the Epworth Sleepiness Scale (ESS) and the Athens Insomnia Scale (AIS). Ever-smokers completed the Fagerstrom Test for Nicotine Dependence (FTND). Results: OSA was confirmed in 72.1% of participants with 62.2% suffering from moderate-to-severe disease. The number of cigarettes/day, Pack/Years, and FTND were significantly higher in patients with more severe OSA. The prevalence of current smokers was higher in those without OSA or with mild disease, whereas the prevalence of former smokers was higher in moderate and severe OSA. In univariate analysis, current smokers were found to be 1.2 times more likely to have OSA compared with never and former smokers combined and former smokers 1.49 times more likely compared with never smokers. In the multiple regression analysis, after adjusting for BMI, gender, age and number of alcoholic drinks per week, smoking was not found to be significantly associated with OSA. In gender stratified multivariate analyses, no significant associations were observed. CVD co-morbidities were more frequent in more severe OSA. Hypertension, coronary disease and diabetes were more prevalent in former smokers with AHI â„ 15, compared with current smokers, especially in men. Conclusions: Even if an independent effect of smoking on OSA was not found, the number of cigarettes/day, Pack/Years, and FTND were higher in patients with more severe OSA with more prevalent CVD co-morbidities
Developing environmental data processing methods to spatialize exposure indicators for three polycyclic aromatic hydrocarbon substances
International audienc
Characterizing environmental health inequalities with spatial environmental database, exposure model and biomonitoring measures
Environmental health inequalities have become a major preoccupation for public health as evidenced by the emergence of the French national plans for health and environment. The third plan (2015-2019) has highlighted that the development of a methodology to derive indicators for identifying and characterizing environmental health inequalities is a priority. At a regional scale, environmental monitoring networks are not sufficient to capture the multidimensionality of the exposure at finer resolution. In order to increase representativeness, exposure composite indicators could be built using additional available databases and statistical modeling. To tackle these objectives, the proposed methodology is to combine contaminant source and environmental concentration databases, exposure model and population biological impregnation measurements with a spatial approach. To elicit the proposed methodology we will consider a pesticide case study developed in the context of the MecoExpo study conducted in Picardy (France). Notably in this framework, topsoil concentrations are estimated using a spatial interpolation, method able to integrate topsoil concentration and pesticide deposit data. For water, concentrations are temporally interpolated with methodology that allows us to overcome the problem of under the detection limit concentrations. Then, an exposure multimedia model developed by INERIS is employed to estimate exposure dose in comparison with biological impregnations of cohort participants (neonatal meconium assays - 700 participants). Analysisâ outputs enable to build cumulative exposure indicator, identify pollutant sources and determinants of exposure and vulnerable populations. As a perspective, spatial relationships of exposure indicators, biological impregnation and health data will be estimated to identify potential factors influencing variability in disease spatial pattern in the French coordinated integrated environment and health inequality platform project
Vigabatrin-Induced Encephalopathy in a 5.5-Month-Old Girl with Infantile Spasms due to Tuberous Sclerosis
A 5.5-month-old female infant with tuberous sclerosis complex presented
with infantile spasms and was treated with vigabatrin. As her condition
did not improve, she was given adrenocorticotropic hormone (ACTH)
intramuscularly which stopped the spasms and improved the
electroencephalogram (EEG) abnormalities. However, she developed
encephalopathy with apathy, drowsiness, and generalized slowing in the
EEG. Discontinuation of vigabatrin quickly improved her symptoms and
reversed the EEG slowing. A high index of suspicion is required in order
to diagnose vigabatrin-induced encephalopathy, especially as the
underlying disorders of these patients can be erroneously considered the
cause of the observed encephalopathy
Characterization of Environmental Health Inequalities Due to Polyaromatic Hydrocarbon Exposure in France
Characterization of Environmental Health Inequalities Due to Polyaromatic Hydrocarbon Exposure in Franc
A Study of Blood Fatty Acids Profile in Hyperlipidemic and Normolipidemic Subjects in Association with Common PNPLA3 and ABCB1 Polymorphisms
Adiponutrin (patatin-like phospholipase domain-containing 3; PNPLA3), encoded in humans by the PNPLA3 gene, is a protein associated with lipid droplet and endoplasmic reticulum membranes, where it is apparently involved in fatty acid redistribution between triglycerides and phospholipids. A common polymorphism of PNPLA3 (I148M, rs738409), linked to increased PNPLA3 presence on lipid droplets, is a strong genetic determinant of non-alcoholic fatty liver disease (NAFLD) and of its progression. P-glycoprotein (Pgp, MDR1âmultidrug resistance protein 1, ABCB1âATP-binding cassette sub-family B member 1), encoded by the ABCB1 gene, is another membrane protein implicated in lipid homeostasis and steatosis. In the past, common ABCB1 polymorphisms have been associated with the distribution of serum lipids but not with fatty acids (FA) profiles. Similarly, data on the effect of PNPLA3 I148M polymorphism on blood FAs are scarce. In this study, a gas chromatography-flame ionization detection (GC-FID) method was optimized, allowing us to analyze twenty FAs (C14: 0, C15: 0, C15: 1, C16: 0, C16: 1, C17: 0, C17: 1, C18: 0, C18: 1cis, C18: 2cis, C20: 0, C20: 1n9, C20: 2, C20: 3n6, C20: 4n6, C20: 5, C23: 0, C24: 0, C24: 1 and C22: 6) in whole blood, based on the indirect determination of the fatty acids methyl esters (FAMES), in 62 hyperlipidemic patients and 42 normolipidemic controls. FA concentrations were then compared between the different genotypes of the rs738409 and rs2032582 (ABCB1 G2677T) polymorphisms, within and between the hyperlipidemic and normolipidemic groups. The rs738409 polymorphism appears to exert a significant effect on the distribution of blood fatty acids, in a lipidemic and fatty acid saturation state-depending manner. The effect of rs2032582 was less pronounced, but the polymorphism did appear to affect the relative distribution of blood fatty acids between hyperlipidemic patients and normolipidemic controls