666 results on '"P. Perros"'
Search Results
102. Use of Thyroid Hormones in Hypothyroid and Euthyroid Patients; the 2019 Italian Survey
- Author
-
Negro, Roberto, Attanasio, Roberto, Nagy, Endre V., Papini, Enrico, Perros, Petros, and Hegedüs, Laszlo
- Abstract
Background:The incidence and prevalence of hypothyroidism are increasing and the threshold for the treatment of hypothyroid as well as individuals without evident thyroid disease with thyroid hormone is declining. Objective:To investigate endocrinologists’ use of thyroid hormones in hypothyroid and euthyroid patients in Italy, a country where different formulations of levothyroxine (LT4; tablet, liquid solution and soft-gel capsule) are available on the market. Methods:Members of the Associazione Medici Endocrinologi (Italian Association of Clinical Endocrinologists) were invited to participate in a web-based survey investigating the topic. Results:A total of 797 of 2,028 (39.3%) members completed all the sections of the survey; 98.7% declared that the treatment of choice for hypothyroidism is LT4. A significant minority (37.3%) indicated that LT4 may be considered in infertile euthyroid women seeking pregnancy and harbouring positive thyroperoxidase antibodies (TPOAb) and in goitre increasing in size (18.1%). LT4 + LT3 was considered by 43.2% for LT4-replaced patients and normal TSH, if they reported persistent symptoms. High percentages of respondents chose LT4 in a liquid solution or soft-gel capsules when taken together with other drugs interfering with LT4 absorption (81.8%), in patients with a history of celiac disease, malabsorption, lactose intolerance, intolerance to common excipients (96.6%), or unexplained poor biochemical control of hypothyroidism (74.4%), or in patients not able to adhere to ingesting LT4 fasted and/or separated from food/drink (98.9%). In total, 43.6% of responders would use LT4 in a liquid solution or soft-gel capsules for hypothyroid patients with biochemical euthyroidism on LT4, who had persistent symptoms. Conclusions:The preferred treatment for hypothyroidism is LT4; LT3 + LT4 combination treatment is mainly considered in patients with persistent symptoms. A significant minority would offer LT4 to euthyroid women with positive TPOAb and infertility and to euthyroid patients with progressive simple goitre. Alternative LT4 formulations like liquid solution or soft-gel capsules are largely reserved for specific conditions (interfering drugs, actual or suspected malabsorption, inability to take LT4 in the fasting state, unexplained poor biochemical control of hypothyroidism).
- Published
- 2020
- Full Text
- View/download PDF
103. Preface
- Author
-
Onvural, Raif O., Perros, Harry G., and Pujolle, Guy
- Published
- 1994
- Full Text
- View/download PDF
104. New off-line aircraft instrumentation for non-methane hydrocarbon measurements
- Author
-
Corinne Jambert, P. Perros, Agnès Borbon, and Joelle Bechara
- Subjects
chemistry.chemical_classification ,Detection limit ,Moisture ,Chemistry ,Instrumentation ,Analytical chemistry ,Sampling (statistics) ,Biochemistry ,Methane ,Analytical Chemistry ,Troposphere ,chemistry.chemical_compound ,Range (aeronautics) ,Volatile organic compound ,Remote sensing - Abstract
New off-line instrumentation was developed to implement measurements of non-methane hydrocarbons (NMHC) on (French) research aircraft. NMHC are collected on multisorbent tubes by AMOVOC (Airborne Measurements Of Volatile Organic Compounds), a new automatic sampler. AMOVOC is a versatile and portable sampler targeting a wide range of NMHC at high frequency (sampling time of 10 min). Multisorbent tubes are analyzed on the ground by short-path thermal desorption coupled with gas chromatography and mass spectrometry. The development and optimization of both NMHC sampling and analysis are reported here. On the one hand, the paper points out technical choices that were made according to aircraft constraints and avoiding sample loss or contamination. On the other hand, it describes analytical optimization, tube storage stability, and moisture removal. The method shows high selectivity, sensitivity (limit of detection less than 10 ppt) and precision (less than 24%). Finally, NMHC data collected on French aircraft during the African Monsoon Multidisciplinary Analysis campaign are reported for the first time. The results highlight instrumentation validity and protocol efficiency for NMHC measurements in the lower and upper troposphere.
- Published
- 2008
105. A survey of current practices by the British Oculoplastic Surgery Society (BOPSS) and recommendations for delivering a sustainable multidisciplinary approach to thyroid eye disease in the United Kingdom
- Author
-
Lee, Vickie, Avari, Parizad, Williams, Ben, Perros, Petros, and Dayan, Colin
- Abstract
Background: The Royal College of Physicians (RCP) and Thyroid Eye Disease Amsterdam Declaration Implementation Group (TEAMeD-5) have the common goal of improving access to high quality care for thyroid eye disease (TED). The TEAMeD-5 programme recommends all patients with moderate-to-severe TED should have access to multidisciplinary clinics (MDT) with combined Ophthalmology and Endocrinology expertise. Methods: The British Oculoplastic Surgery Society represents oculoplastic surgeons who usually lead TED care in the UK. A two-stage survey of the membership was conducted to ascertain current practice of existing resources. Results: Seventy percent (45/65) of respondents in Survey 1 were aware of current RCP guidance, but only 49% (22/45) rated it as a good means of improving access to comprehensive TED service. Sixty percent (39/65) of respondents are working in a multidisciplinary TED clinic with co-location of ophthalmologists and endocrinologists. Care for TED appears not to be provided in a multidisciplinary context in up to 31% (20/65). Thirty five (54%) of the respondents rated their relationship with endocrinology colleagues as good. Best practice guidelines recommend routine quality of life assessments but only 6/28 (21%) of respondents use this modality in current practice. Six percent (4/65) of areas appear not to be using intravenous steroids. In many areas (25%, 16/65), second-line immunosuppression is provided in a different trust and in 8% (5/65), it appears not to be used at all. Conclusion: This survey is a ‘snapshot’ of current TED management in the UK and findings suggest scope for improvement. We recommend a framework for more robust collaboration across specialties and propose standards endorsed by multidisciplinary stakeholder societies.
- Published
- 2020
- Full Text
- View/download PDF
106. Automated real-time anomaly detection of temperature sensors through machine-learning
- Author
-
Nayak, Debanjana and Perros, Harry
- Abstract
Fast identification of faulty sensors is necessary for guaranteeing their robust functions in diverse applications ranging from extreme weather prediction to energy saving to healthcare. We present an automated machine-learning based framework that can detect anomalies of temperature sensor data in real-time. We adopted a purely temporal approach that utilises a univariate time-series (UTS) generated by a single sensor. The framework divides the UTS into subsequences, models each subsequence stochastically as an autoregressive function, and finally mines the function parameters with a one-class support vector machines (OC-SVM) that classifies any outlier as an anomaly. Extensive experimentation showed that the framework identifies both normal and anomalous data correctly with high degrees of accuracy.
- Published
- 2020
- Full Text
- View/download PDF
107. Performance Analysis of Microservice Design Patterns
- Author
-
Akbulut, Akhan and Perros, Harry G.
- Abstract
Microservice-based solutions are currently gaining momentum because they do not have the disadvantages of traditional monolithic architectures. Business interest in microservices is increasing since the microservice architecture brings a lightweight, independent, reuse-oriented, and fast service deployment approach that minimizes infrastructural risks. This approach is at an early stage of its development, and in view of this, it is important to understand the performance of its design patterns. In this article, we obtained performance results related to query response time, efficient hardware usage, hosting costs, and packet-loss rate, for three microservice design patterns practiced in the software industry.
- Published
- 2019
- Full Text
- View/download PDF
108. 3D analysis of high ozone production rates observed during the ESCOMPTE campaign
- Author
-
Isabelle Coll, P. Perros, Stéphanie Pinceloup, G. Laverdet, and Georges Le Bras
- Subjects
Atmospheric Science ,Ozone ,Meteorology ,Air pollution ,medicine.disease_cause ,Plume ,Troposphere ,chemistry.chemical_compound ,chemistry ,Photostationary state ,Atmospheric chemistry ,medicine ,Panache ,Environmental science ,NOx - Abstract
The development of environmental policies to reduce the ozone levels around large agglomerations requires a good understanding of the development of ozone episodes. In particular, it is necessary to know the location and photochemical activity of the plume where ozone is formed. Measurement campaigns make it possible not only to characterize the concentration fields of ozone and its precursors but also to identify the zones of strong ozone production, by means of specific measurements and kinetic calculations. The combination of the observation-based data with numerical simulations allows to better characterize photochemical pollution. This paper presents a study carried out within the ESCOMPTE program and based on the determination of ozone production rates by experimental and numerical methods: ground measurements of peroxy radicals, NOx at a rural site, airborne measurements of NOX and O3, Eulerian modeling. The reported case is of particular interest since it corresponds to an episode with very different photochemical situations. The diurnal variations of the peroxy radical concentration are analyzed in relation to those of ozone and its precursors. Ozone production rates—P(O3)–are studied over one particular day. The results show particularly high concentrations of RO2+HO2 at ground level (up to 200 pptv) under the influence of the urban and industrial plume, but also highlight very high production rates of ozone (60 to 80 ppbv h−1) a few tens of kilometers from the sources. The results show satisfactory agreement between the various approaches. Modeling provides a four-dimensional (4D) description of the plumes, in particular the relation between the ozone precursor concentrations and P(O3) on the ground.
- Published
- 2005
109. [Untitled]
- Author
-
P. Perros, P. Colin, H. Boudries, A. L. Dutot, A. Etienne, I. Fenneteaux, and G. Toupance
- Subjects
Gulf Stream ,Troposphere ,Atmospheric Science ,Oceanography ,North Atlantic Deep Water ,Environmental Chemistry ,Environmental science ,Outflow ,Thermohaline circulation ,Air mass ,Trace gas ,Latitude - Abstract
The atmospheric concentrations of O3, NMHCs, PAN and NOx were measured at the TOR station in Porspoder (Brittany, France) from 1992 to 1995. The results from April 1992 to December 1994 are reported here. In order to study the behaviour of trace gases in the air masses coming from the Atlantic Ocean, the origin of these air masses was characterised by the analysis of the five-day back-trajectories reaching 950 mbar at Porspoder. Three kinds of oceanic air masses are considered, depending on their origin: North Atlantic northern and southern latitudes and North American continent. It appears that the oceanic high-latitude troposphere was strongly influenced by continental emissions, which in turn impacted the median latitude troposphere during polar outflow events. A greater accumulation of anthropogenic compounds in the Arctic sector was calculated and may be at the origin of the high oxidant levels measured in spring in this same sector. The influence of north American emissions on the European coast was also studied and seems to reach a maximum in spring. Long-range transport of long- lived species was observed throughout the year, but evidence for winter transport of more reactive species, such as ethene, is also shown. Meteorological parameters and local photochemistry appear to play an important role in the distribution of the pollutants over the North Atlantic Ocean throughout the year. Further investigations are needed to give more complete information about the origin, formation and destruction of the secondary pollutants.
- Published
- 1999
110. Wafer-Scale Self-Organized InP Nanopillars with Controlled Orientation for Photovoltaic Devices
- Author
-
Sanatinia, Reza, Berrier, Audrey, Dhaka, Veer, P. Perros, Alexander, Huhtio, Teppo, Lipsanen, Harri, Anand, Srinivasan, Sanatinia, Reza, Berrier, Audrey, Dhaka, Veer, P. Perros, Alexander, Huhtio, Teppo, Lipsanen, Harri, and Anand, Srinivasan
- Abstract
A unique wafer-scale self-organization process for generation of InP nanopillars is demonstrated, which is based on maskless ion-beam etching (IBE) of InP developed to obtain the nanopillars, where the height, shape, and orientation of the nanopillars can be varied by controlling the processing parameters. The fabricated InP nanopillars exhibit broadband suppression of the reflectance, 'black InP,' a property useful for solar cells. The realization of a conformal p-n junction for carrier collection, in the fabricated solar cells, is achieved by a metalorganic vapor phase epitaxy (MOVPE) overgrowth step on the fabricated pillars. The conformal overgrowth retains the broadband anti-reflection property of the InP nanopillars, indicating the feasibility of this technology for solar cells. Surface passivation of the formed InP nanopillars using sulfur-oleylamine solution resulted in improved solar-cell characteristics. An open-circuit voltage of 0.71 V and an increase of 0.13 V compared to the unpassivated device were achieved., Updated from manuscript to article in journal.QC 20160203
- Published
- 2015
- Full Text
- View/download PDF
111. Extracellular matrix remodeling and its implication in vascular cells reprogramming during pulmonary arterial hypertension
- Author
-
Rachedi, N., Torrino, S., Abelanet, S., Gay, A., Debayle, D., Perros, F., and Bertero, T.
- Abstract
Pulmonary arterial hypertension (PAH) is a deadly pulmonary vascular disease with enigmatic molecular origins. PAH is characterized by an intense remodeling of the pulmonary arterial wall, as well as inflammation and fibrosis throughout the vasculature. Pulmonary arterial remodeling is driven by an excessive proliferation of multiple vascular cell types, leading to increased pulmonary vascular resistance, and ultimately, to severe right-sided heart failure. There exist over a dozen approved pulmonary vasodilatory therapies for PAH which provide symptomatic relief and slow down PAH progression, however, none of them prevents it – or even more cures it – by targeting its molecular origins. The extracellular matrix (ECM) is the principal extracellular component of all tissues and organs. It provides the scaffold that gives physical support to cells and regulates intercellular biochemical and biomechanical signaling. The organization and composition of ECM is not static; it is a dynamic structure. Disruptions and perturbations of this network result in a loss of cell and tissue homeostasis and lead to several diseases. Recently, we reported that activation of resident adventitial fibroblasts drives ECM remodeling to promote pulmonary vascular dysfunction in PAH. Yet, beyond collagen and elastin production, activated fibroblasts produce and secrete hundreds of ECM proteins. Whether and how these proteins affect vascular wall structure and reprogram vascular cells to promote PAH remain unknown.
- Published
- 2023
- Full Text
- View/download PDF
112. High PAN concentrations during nonsummer periods: A study of two episodes in Creteil (Paris), France
- Author
-
Tsalkani, N., Perros, P., and Toupance, G.
- Published
- 1987
- Full Text
- View/download PDF
113. Approximate analysis of arbitrary configurations of open queueing networks with blocking
- Author
-
Altiok, T. and Perros, H. G.
- Published
- 1987
- Full Text
- View/download PDF
114. Early Development of Right Ventricular Ischemic Lesions in a Novel Large Animal Model of Acute Right Heart Failure in Chronic Thromboembolic Pulmonary Hypertension.
- Author
-
Boulate, David, Arthur Ataam, Jennifer, Connolly, Andrew J., Giraldeau, Genevieve, Amsallem, Myriam, Decante, Benoit, Lamrani, Lilia, Fadel, Elie, Dorfmuller, Peter, Perros, Frederic, Haddad, Francois, and Mercier, Olaf
- Abstract
Background: Our aim was to develop a model of acute right heart failure (ARHF) in the setting of pulmonary hypertension and to characterize acute right ventricular lesions that develop early after hemodynamic restoration.Methods and Results: We used a described piglet model of chronic pulmonary hypertension (cPH) induced by pulmonary artery occlusions. We induced ARHF in animals with cPH (ARHF-cPH group, n = 9) by volume loading and iterative acute pulmonary embolism until hemodynamic compromise followed by dobutamine infusion for hemodynamic restoration before sacrifice for right ventricular tissue evaluation. The median duration of ARHF before sacrifice was 162 (135-189) minutes. Although ventriculoarterial coupling (measured with multibeat pressure-volume loops) and stroke volume decreased after iterative pulmonary embolism and improved with dobutamine, relative pulmonary to systemic pressure increased by 2-fold and remained similarly increased with dobutamine. Circulating high-sensitivity troponin I increased after hemodynamic restoration. We found an increase in right ventricular subendocardial and subepicardial focal ischemic lesions and in expression of autophagy-related protein LC3-II (Western blot) in the ARHF-cPH group compared with the cPH (n = 5) and control (n = 5) groups.Conclusions: We developed and phenotyped a novel large animal model of ARHF on cPH in which right ventricular ischemic lesions were observed early after hemodynamic restoration. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
115. Bmpr2Mutant Rats Develop Pulmonary and Cardiac Characteristics of Pulmonary Arterial Hypertension
- Author
-
Hautefort, Aurélie, Mendes-Ferreira, Pedro, Sabourin, Jessica, Manaud, Grégoire, Bertero, Thomas, Rucker-Martin, Catherine, Riou, Marianne, Adão, Rui, Manoury, Boris, Lambert, Mélanie, Boet, Angèle, Lecerf, Florence, Domergue, Valérie, Brás-Silva, Carmen, Gomez, Ana Maria, Montani, David, Girerd, Barbara, Humbert, Marc, Antigny, Fabrice, and Perros, Frédéric
- Abstract
Supplemental Digital Content is available in the text.
- Published
- 2019
- Full Text
- View/download PDF
116. Phaeochromocytomas/paragangliomas and adverse clinical outcomes in patients with Neurofibromatosis type 1
- Author
-
Al-Sharefi, A, Perros, P, and James, R A
- Abstract
Phaeochromocytomas/paragangliomas (PHAEO/PG) are linked to hereditary syndromes including Neurofibromatosis type 1 (NF-1). Current guidelines do not recommend biochemical screening for PHAEO/PG in asymptomatic or normotensive patients with NF-1. This strategy may miss preventable morbidities in those patients who ultimately present with symptomatic PHAEO/PG. Our aim was to review the literature and extract data on mode of presentation and the incidence of reported adverse outcomes.PubMed and EMBASE literature search using the keywords ‘Phaeochromocytoma’, ‘Paraganglioma’ and ‘Neurofibromatosis’ was performed looking for reported cases from 2000 to 2018.Seventy-three reports of NF-1 patients with PHAEO/PG were found. Patients were predominately women (n= 40) with a median age of 46 years (range 16–82). PHAEO/PG was found incidentally in most patients, 36/73 did not present with typical symptoms while 27 patients were normotensive at diagnosis. Thirty-one patients had adverse outcomes including metastases and death.Given the protean presentation of PHAEO/PG, relying on symptomology and blood pressure status as triggers for screening, is associated with adverse outcomes. Further studies are required to ascertain whether biochemical screening in asymptomatic and normotensive patients with NF-1 can reduce the rate of adverse outcomes.
- Published
- 2018
- Full Text
- View/download PDF
117. Phosphodiesterase type 9 opposes relaxation of mouse pulmonary artery but does not influence chronic hypoxia-induced pulmonary hypertension in mouse.
- Author
-
Wang, Liting, Zhang, Liang, Varin, Audrey, Jing, Zhi-Cheng, Fischmeister, Rodolphe, Antigny, Fabrice, Perros, Frédéric, Leblais, Véronique, and Manoury, Boris
- Abstract
PDE9 is a phosphodiesterase which has recently emerged as a regulator of cGMP in cardiac and vascular myocytes. Its contribution in vasculature is, however, unclear. We sought to investigate PDE9 expression and function in mouse pulmonary artery by comparing wild type (WT) and PDE9-deficient , Pde9a(-/-), mice. We also addressed the hypothesis that PDE9 could represent a new therapeutic target to treat pulmonary arterial hypertension, a severe, deadly disease. PDE9 expression was examined in mouse tissues and human pulmonary artery from subjects with or without pulmonary arterial hypertension using RT-PCR and immunoblots. Relaxant responses were studied in mouse pulmonary arteries mounted on a myograph and contracted with phenylephrine. A challenge with 21-day, 10% O 2 -hypoxia was used as a model of pulmonary hypertension in mice and was compared to normoxia. Right ventricle and pulmonary artery morphology and function were determined by echocardiography, right ventricle catheterization and gravimetric analysis. PDE9 protein and Pde9a transcript were detected in human and mouse pulmonary arteries, respectively. Pulmonary arteries from Pde9a(-/-) mice displayed more potent relaxant responses to acetylcholine, to the NO donor diethylamine NONOate and to atrial natriuretic peptide than vessels from WT animals. Following hypoxia, Pde9a expression was increased in lung and right ventricle from WT mice. PDE9 deficiency failed to ameliorate pulmonary hypertension hemodynamic criteria, namely higher right ventricular systolic pressure and lower echocardiographic pulmonary arterial acceleration time. Right ventricle hypertrophy, reflected by increased Fulton index, right ventricle thickness and fetal genes expression, were also similar in Pde9a(-/-) and WT groups. PDE9 is expressed in pulmonary artery and takes part in the relaxant responses mediated by the cGMP pathway. The ablation of Pde9a in mouse, however, does not prevent the development of pulmonary hypertension in a 21-day hypoxia model, nor does it attenuate right ventricle deleterious remodeling. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
118. Post-radioiodine management of patients with Graves' disease
- Author
-
P Perros, K Collins, and J Horsefield
- Subjects
medicine.medical_specialty ,Pediatrics ,endocrine system diseases ,business.industry ,Graves' disease ,lcsh:R ,Levothyroxine ,lcsh:Medicine ,General Medicine ,medicine.disease ,General Biochemistry, Genetics and Molecular Biology ,Regimen ,Endocrinology ,Carbimazole ,Thyroid hormones ,Internal medicine ,medicine ,Oral Presentation ,Effective treatment ,Iatrogenic hypothyroidism ,lcsh:Q ,business ,lcsh:Science ,After treatment ,medicine.drug - Abstract
Radioiodine is a safe and effective treatment for Graves' disease. Iatrogenic hypothyroidism is very common after treatment, but its onset is unpredictable. Even a short episode of hypothyroidism can result in significant morbidity and ideally should be avoided. In Newcastle a standard dose of radioiodine (400MBq) is used, but for historical reasons two different protocols are used after radioiodine: Regimen A: regular clinical and biochemical monitoring and initiation of levothyroxine when serum thyroid hormones have normalized, and Regimen B: block and replace with Carbimazole and levothyroxine starting 2 weeks post-radioiodine and continuing for 6 months, then withdrawing Carbimazole, but continuing with levothyroxine long-term.
- Published
- 2012
119. Transport and chemistry of formaldehyde by mesoscale convective systems in West Africa during AMMA 2006
- Author
-
Manuel Ruiz, Charbel Afif, Graham P. Mills, Agnès Borbon, P. Perros, M. Chong, Hans Schlager, Thomas Hamburger, Georges Scialom, Joelle Bechara, Claire E. Reeves, Harald Stark, Heidi Huntrieser, Céline Mari, Bernard Aumont, and Corinne Jambert
- Subjects
Convection ,Atmospheric Science ,Ozone ,010504 meteorology & atmospheric sciences ,Mesoscale meteorology ,Soil Science ,010501 environmental sciences ,Aquatic Science ,Oceanography ,Monsoon ,Atmospheric sciences ,01 natural sciences ,Troposphere ,chemistry.chemical_compound ,Geochemistry and Petrology ,Earth and Planetary Sciences (miscellaneous) ,Scavenging ,NOx ,0105 earth and related environmental sciences ,Earth-Surface Processes ,Water Science and Technology ,Ecology ,Paleontology ,Forestry ,Geophysics ,chemistry ,13. Climate action ,Space and Planetary Science ,Climatology ,Atmospheric chemistry - Abstract
[1] In situ measurements of formaldehyde (CH2O) onboard four European research aircraft in August 2006 as part of the African Monsoon Multidisciplinary Analysis (AMMA) experiment in West Africa are used (1) to examine the redistribution of CH2O by mesoscale convective systems (MCS) in the tropical upper troposphere (UT), (2) to evaluate the scavenging efficiency (SE) of CH2O by MCS and (3) to quantify the impact of CH2O on UT photooxidant production downwind of MCS. The intercomparison of CH2O measurements is first tested, providing a unique and consistent 3-D-spatially resolved CH2O database in background and convective conditions. While carbon monoxide (CO) is vertically uplifted by deep convection up to 12 km, CH2O is also affected by cloud processing as seen from its ratio relative to CO with altitude. A new observation-based model is established to quantify the SE of CH2O. This model shows that convective entrainment of free tropospheric air cannot be neglected since it contributes to 40% of the convective UT air. For the 4 studied MCS, SE shows a large variability within a 4% to 39% range at a relative standard deviation of 30%, which is consistent with MCS features. A time-dependent photochemical box model is applied to convective UT air. After convection, 60% of CH2O is due to its photochemical production rather than to its direct transport. Model results indicate that CH2O directly injected by convection does not impact ozone and HOx production in the tropical UT of West Africa. NOx and anthropogenic hydrocarbon precursors dominate the secondary production of CH2O, ozone and HOx.
- Published
- 2012
120. Large-scale distribution of hydrogen peroxide from aircraft measurements during the TROPOZ II experiment
- Author
-
P. Perros
- Subjects
business.product_category ,Chemistry ,Analyser ,Analytical chemistry ,Mineralogy ,Zonal and meridional ,Airplane ,Troposphere ,chemistry.chemical_compound ,Range (aeronautics) ,Mixing ratio ,General Earth and Planetary Sciences ,Hydrogen peroxide ,business ,Chemical composition ,General Environmental Science - Abstract
Aircraft measurements of hydrogen peroxide (H2O2) were performed during the TROPOZ II meridional campaign. A specially designed automatic H2O2 analyser on board the airplane allowed us to obtain more than 43,000 H2O2 measurements. The data set covers a latitude range from 60°N to 60°S and altitudes up to 11 km. Concentration of H2O2 ranged from 0.42 ppb (percentile 5) to 6.31 ppb (percentile 95) and exhibited a variability factor of as much as 15. Hydrogen peroxide concentration was typically low ( 3 ppb) could be noticed. Some episodes of high hydrogen peroxide mixing ratio were encountered in the vicinity of cloud systems probably by exchange of H2O2 from the liquid phase to the gas phase.
- Published
- 1993
121. Comparative analysis of peripheral natural killer cells in the two phases of the ovarian cycle
- Author
-
Pantazi, A. Tzonis, P. Perros, G. Graphou, O. Keramitsoglou, T. Koussoulakos, S. Margaritis, L. Varla-Leftherioti, M.
- Abstract
Problem: Changes in endometrial Natural Killer (NK) cells during the luteal phase of the ovarian cycle are important in initiating/maintaining a subsequent pregnancy. In the present study it was investigated whether during the menstrual cycle changes occur also in peripheral blood (PB) NKs. Method of study: Blood samples during the follicular and the luteal phase were collected from 30 women without fertility problems. Samples were analyzed by flow-cytometry for: (1) NK cells (CD3-CD16+CD56+) and (2) intracellular production of interferon-γ (IFN-γ) by NK cells. For the comparison and correlation of the two populations between the two phases, Wilcoxon signed-rank test and Spearman's Coefficient were used. Results: The differences in percentages of CD3-CD16+CD56+ cells and that of CD3-CD16+CD56+/IFN-γ+ cells between the follicular and the luteal phase were not statistically significant (10.61 ± 5.11 versus 9.76 ± 4.57 and 6.48 ± 7.90 versus 7.30 ± 6.77, respectively, P > 0.05). The correlation between the two variables (NK% and NK/IFN-γ%) was weakly positive (P = 0.07) only in the follicular phase. Conclusion: The study did not reveal menstrual cycle-depended changes in PB NK cells. Thus, a suggestion to measure these cells in a specific phase of the cycle in order to predict the outcome of a subsequent pregnancy in women with fertility problems is objected. © 2009 John Wiley & Sons A/S.
- Published
- 2010
122. Evidence of the impact of deep convection on reactive Volatile Organic Compounds in the upper tropical troposphere during the AMMA experiment in West Africa
- Author
-
P. Perros, Aurélie Colomb, Corinne Jambert, Joelle Bechara, Agnès Borbon, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'aérologie (LA), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire de météorologie physique (LaMP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), and The publication of this article is financed by CNRS-INSU
- Subjects
Convection ,[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] ,Atmospheric Science ,010504 meteorology & atmospheric sciences ,Mesoscale meteorology ,15. Life on land ,010501 environmental sciences ,Atmospheric sciences ,01 natural sciences ,lcsh:QC1-999 ,Trace gas ,Troposphere ,lcsh:Chemistry ,Altitude ,lcsh:QD1-999 ,13. Climate action ,Cloud base ,Climatology ,Outflow ,Air mass ,lcsh:Physics ,0105 earth and related environmental sciences - Abstract
A large dataset of reactive trace gases was collected for the first time over West Africa during the African Monsoon Multidisciplinary Analysis (AMMA) field experiment in August 2006. Volatile Organic Compounds (VOC from C5–C9) were measured onboard the two French aircrafts the ATR-42 and the Falcon-20 by a new instrument AMOVOC (Airborne Measurement Of Volatile Organic Compounds). The goal of this study is (i) to characterize VOC distribution in the tropical region of West Africa (ii) to determine the impact of deep convection on VOC distribution and chemistry in the tropical upper troposphere (UT) and (iii) to characterize its spatial and temporal extensions. Experimental strategy consisted in sampling at altitudes between 0 and 12 km downwind of Mesoscale Convective Systems (MCS) and at cloud base. Biogenic and anthropogenic VOC distribution in West Africa is clearly affected by North to South emission gradient. Isoprene, the most abundant VOC, is at maximum level over the forest (1.26 ppb) while benzene reaches its maximum over the urban areas (0.11 ppb). First, a multiple physical and chemical tracers approach using CO, O3 and relative humidity was implemented to distinguish between convective and non-convective air masses. Then, additional tools based on VOC observations (tracer ratios, proxy of emissions and photochemical clocks) were adapted to characterize deep convection on a chemical, spatial and temporal basis. VOC vertical profiles show a "C-shaped" trend indicating that VOC-rich air masses are transported from the surface to the UT by deep convective systems. VOC mixing ratios in convective outflow are up to two times higher than background levels even for reactive and short-lived VOC (e.g. isoprene up to 0.19 ppb at 12 km-altitude) and are dependent on surface emission type. As a consequence, UT air mass reactivity increases from 0.52 s−1 in non-convective conditions to 0.95 s−1 in convective conditions. Fractions of boundary layer air contained in convective outflow are estimated to be 40 ± 15%. Vertical transport timescale is calculated to be 25 ± 10 min between 0 to 12 km altitude. These results characterize deep convection occurring over West Africa and provide relevant information for tropical convection parameterization in regional/global models.
- Published
- 2010
123. Metachronous testicular teratoma, testicular seminoma and papillary thyroid carcinoma occurring in a single individual: a report of two unrelated cases
- Author
-
A A, Syed, N A G, Jones, R D, Bliss, J T, Roberts, U K, Mallick, S J, Johnson, S F, Douglas, P, Perros, and R, Quinton
- Subjects
Adult ,Male ,Neoplasms, Multiple Primary ,Young Adult ,Treatment Outcome ,Testicular Neoplasms ,Teratoma ,Humans ,Thyroid Neoplasms ,Carcinoma, Papillary ,Seminoma - Abstract
We describe two unrelated men who both developed teratomas in one testis followed by seminomas in the contralateral testis followed by papillary thyroid carcinomas. Neither man had a family history of cancers. Although random occurrence is possible, genetic predisposition and/or environmental influence would seem a likely explanation for this previously unreported combination of tumours.
- Published
- 2009
124. Effects of regional-scale and convective transports on tropospheric ozone chemistry revealed by aircraft observations during the wet season of the AMMA campaign
- Author
-
Céline Mari, P. Perros, A. Kukui, J. Leclair de Bellevue, Gérard Ancellet, Agnès Borbon, Philippe Nédélec, TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), INSUAMMA EC project, Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Laboratoire d'aérologie (LA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), and Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] ,Atmospheric Science ,010504 meteorology & atmospheric sciences ,Mesoscale meteorology ,010501 environmental sciences ,Atmospheric sciences ,Monsoon ,01 natural sciences ,lcsh:QC1-999 ,Trace gas ,Low-pressure area ,Troposphere ,lcsh:Chemistry ,chemistry.chemical_compound ,chemistry ,lcsh:QD1-999 ,13. Climate action ,Climatology ,11. Sustainability ,Outflow ,Tropospheric ozone ,Air mass ,lcsh:Physics ,0105 earth and related environmental sciences - Abstract
The African Monsoon Multidisciplinary Analyses (AMMA) fourth airborne campaign was conducted in July–August 2006 to study the chemical composition of the middle and upper troposphere in West Africa with the major objective to better understand the processing of chemical emissions by the West African Monsoon (WAM) and its associated regional-scale and vertical transports. In particular, the french airborne experiment was organized around two goals. The first was to characterize the impact of Mesoscale Convective Systems (MCSs) on the ozone budget in the upper troposphere and the evolution of the chemical composition of these convective plumes as they move westward toward the Atlantic Ocean. The second objective was to discriminate the impact of remote sources of pollution over West Africa, including transport from the middle east, Europe, Asia and from southern hemispheric fires. Observations of O3, CO, NOx, H2O and hydroperoxide above West Africa along repeated meridional transects were coupled with transport analysis based on the FLEXPART lagrangian model. The cross analysis of trace gas concentrations and transport pathways revealed 5 types of air masses: convective uplift of industrial and urban emissions, convective uplift of biogenic emissions, slow advection from Cotonou polluted plumes near the coast, meridional transport of upper tropospheric air from the subtropical barrier region, and meridional transport of Southern Hemisphere (SH) biomass burning emissions. O3/CO correlation plots and the correlation plots of H2O2 with a OH proxy revealed not only a control of the trace gas variability by transport processes but also significant photochemical reactivity in the mid- and upper troposphere. The study of four MCSs outflow showed contrasted chemical composition and air mass origins depending on the MCSs lifetime and latitudinal position. Favorables conditions for ozone production were found for MCSs with increased MCS lifetime (>1.5 days), which allowed for more H2O2 formation, and with trajectories crossing the 10° N latitude, which increased CO transport to the upper troposphere. The upper tropospheric concentrations sampled in the MCS outflow regions showed mixed origins including local vertical convective transport, and uplifting of air from the low troposphere over the middle-east related to the summer Asian low pressure system or from the southern hemispheric fires.
- Published
- 2009
125. One-year measurements of PAN in the Paris basin: Effect of meteorological parameters
- Author
-
Gérard Toupance, N. Tsalkani, A. L. Dutot, and P. Perros
- Subjects
Anticyclone ,Climatology ,General Earth and Planetary Sciences ,Environmental science ,Structural basin ,General Environmental Science ,Photochemical pollution - Abstract
PAN has been measured continuously for 1 year in Creteil, a southeastern suburb of Paris Correspondence analysis was used to analyse the important PAN database obtained during this period, in relation to associated meteorological parameters and the location of precursors sources. This analysis revealed a complex relation (U-shaped curve) between PAN and temperatures, with a minimum in the range of 4–12°C and an increase in the lower and higher temperatures, arising from the competition between photochemical production and thermal decomposition. Long-range transport of PAN is associated with easterly winds and occurs under anticyclonic conditions in all seasons, particularly in winter. The highest PAN values (maximum 33.6 ppb) are observed in summer. They have a local origin and are associated with northwesterly to southwesterly winds, revealing the net impact, in summer, of nearby sources such as the urban conglomeration of Paris on PAN levels recorded in the surrounding areas.
- Published
- 1991
126. Role of convective transport on tropospheric ozone chemistry revealed by aircraft observations during the wet season of the AMMA campaign
- Author
-
G. Ancellet, J. Leclair de Bellevue, C. Mari, P. Nedelec, A. Kukui, A. Borbon, and P. Perros
- Abstract
During the wet season of the African Monsoon Multidisciplinary Analyses (AMMA) campaign, airborne measurements of several chemical species were made onboard the French Falcon-20 (FF20) aircraft. The scientific flights were planned in order to document, on one hand the regional distribution of trace gas species related to the oxidizing capacity of the troposphere, and on the other hand their spatial variability in the outflow of mesoscale convective systems (MCSs). The main objectives of this paper are the analysis of the main transport processes responsible for the observed variability, and the discussion of differences and similarities related to the convective transport by 4 different MCSs. This work is needed before using this data set for future studies of the convective transport of chemical species or for modeling work in the frame of the AMMA project. Regarding the regional distribution, five air masses types have been identified using the Lagrangian particle dispersion model FLEXPART, and by considering relationship between the measured trace gas concentrations (O3, CO, NOx, H2O, and hydroperoxides). This paper specifically discusses the advantage of hydroperoxide measurements in order to document the impact of recent or aged convection. The highest values of O3 are found to be related to transport from the subtropical tropopause region into the mid-troposphere at latitudes as low as 10° N. The lowest ozone values have been always explained by recent uplifting from the monsoon layer where O3 is photochemically destroyed. Regarding the analysis of the MCS outflow, the CO and H2O2 enhancements are related to the age and the southernmost position of the MCS. The analysis of the long range transport of the air masses where convection occurred, shows a connection with the Persian Gulf emissions for the largest CO concentrations in MCS outflow. However for our observations, Lagrangian particle dispersion modelling shows that this possible source is always modified by the convective transport of CO from the African lower troposphere when the air masses encounter a convective system at latitudes below 10° N.
- Published
- 2008
127. Evaluation of the LMDz-INCA chemistry climate model during the West African monsoon 2006
- Author
-
I. Bouarar (1), K. Law (1), M. Pham (1), F. Hourdin (2), S. Szopa (3), P. Nédélec (4), C. Jambert (4), P. Perros (5), F. Cairo (6), F. Ravegnani (6), S. Viciani (7), P. Mazzinghi (7), and H. Schlager (8)
- Published
- 2008
128. SO2 in Beirut : air quality implication and effects of local emissions and long range transport
- Author
-
Charbel Afif, Carine Chélala, Agnès Borbon, Jocelyne Adjizian-Gérard, Wehbeh Farah, Nada Badaro Saliba, Rita Zaarour, Corinne Jambert, Maher Abboud, Toufic Rizk, P. Perros, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'aérologie (LA), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
Pollution ,Atmospheric Science ,010504 meteorology & atmospheric sciences ,Meteorology ,Beirut ,Range (biology) ,media_common.quotation_subject ,Health, Toxicology and Mutagenesis ,[SDE.MCG]Environmental Sciences/Global Changes ,Distribution (economics) ,010501 environmental sciences ,Winter time ,Management, Monitoring, Policy and Law ,Disease cluster ,Atmospheric sciences ,01 natural sciences ,Air quality monitoring ,11. Sustainability ,Air quality index ,0105 earth and related environmental sciences ,media_common ,business.industry ,Wind direction ,Passive sampler ,Sulfur dioxide ,13. Climate action ,Air quality ,Environmental science ,Long-range transport ,business - Abstract
National audience; While sulfur dioxide (SO2) emissions have been dramatically restricted in the past few decades, some cities in developing countries still encounter high pollution levels. This makes it essential to implement an air quality monitoring network in these sensitive regions. Results from a program of measuring ground-level concentration of SO2 (from December 2004 till July 2006) at 22 curbside and background sites within the city of Beirut (Lebanon) are presented for the first time. Four-week sampling period measurements were made over 20 periods for all sites by passive sampling. Low SO2 concentrations were observed (3.1 parts per billion on average for the whole period). This value is among the lowest observed in urban areas worldwide. Thus, Beirut is not polluted by SO2 on an annual basis. Highest concentrations were measured in winter time, resulting from low height of the boundary layer and higher emissions of SO2 (e.g., heating). Cluster analysis revealed two different SO2 variation patterns over the city (high- and low-level patterns), highlighting the effects of local sources location and wind direction variability on SO2 distribution. Analysis of seasonal variations pointed out a springtime SO2 maximum in 2005. Beside local sources, long-range transport can account for an important source of SO2 in Beirut, explaining around 50% of SO2 levels within the city.
- Published
- 2008
129. Plasma endothelin response to acute hypoglycaemia in adults with Type 1 diabetes
- Author
-
R J, Wright, K M, Macleod, P, Perros, N, Johnston, D J, Webb, and B M, Frier
- Subjects
Adult ,Blood Glucose ,Male ,Diabetes Mellitus, Type 1 ,Treatment Outcome ,Endothelins ,Humans ,Hypoglycemic Agents ,Insulin ,Female ,Hypoglycemia - Abstract
To determine whether acute insulin-induced hypoglycaemia provokes a detectable alteration in peripheral plasma endothelin (ET) concentrations in humans with Type 1 diabetes.Serial plasma concentrations of ET were measured in 20 patients with Type 1 diabetes during controlled hypoglycaemia induced by intravenous infusion of soluble insulin.A significant increase was observed in plasma ET concentrations, from 3.80 +/- 0.31 pg/ml at baseline to 6.72 +/- 1.47 pg/ml at 60 min after the onset of the hypoglycaemic reaction (P0.05).Acute insulin-induced hypoglycaemia induces a rise in plasma endothelin concentrations in people with Type 1 diabetes. This finding is consistent with a putative role for ET in the mediation of hypoglycaemia-induced vasoconstriction, and the possible precipitation of macrovascular or microvascular events.
- Published
- 2007
130. Evaluation of the LMDzINCA chemistry transport model during the West African monsoon 2006
- Author
-
I. Bouarar, K. Law, M. Pham, M. A. Filiberti, F. Hourdin, D. A. Hauglustaine, P. Nédélec, C.Jambert, P. Perros, F. Cairo, F. Ravegnani, S. Viciani, P. Mazzinghi, H. Schlager, and D. Stewart
- Published
- 2007
131. Clinical assessment of patients with Graves' orbitopathy: the European Group on Graves' Orbitopathy recommendations to generalists, specialists and clinical researchers
- Author
-
W M Wiersinga, P Perros, G J Kahaly, M P Mourits, L Baldeschi, K Boboridis, A Boschi, A J Dickinson, P Kendall-Taylor, G E Krassas, C M Lane, J H Lazarus, C Marcocci, M Marino, M Nardi, C Neoh, J Orgiazzi, A Pinchera, S Pitz, M F Prummel, M S Sartini, M Stahl, G von Arx, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, Endocrinology, AII - Amsterdam institute for Infection and Immunity, and Ophthalmology
- Subjects
medicine.medical_specialty ,Referral ,business.industry ,Endocrinology, Diabetes and Metabolism ,Graves' disease ,Public health ,Research ,MEDLINE ,Physicians, Family ,General Medicine ,Disease ,Guideline ,Primary care ,medicine.disease ,Graves Ophthalmopathy ,Endocrinology ,Multidisciplinary approach ,Internal medicine ,Medicine ,Humans ,business - Abstract
The European Group on Graves’ Orbitopathy(EUGOGO) was established in order to promotebetter clinical care of patients with Graves’ orbito-pathy (GO) (1, 2) and to facilitate research in thisdisease. EUGOGO believes that patients with GOshould be managed in multidisciplinary clinics withinput from endocrinologists and ophthalmologists,who have an interest and experience in managingthis disease (3). Although the expertise of theclinicians is critical and the setting perhaps less so,evidence from other clinical disciplines wouldsuggest that a dedicated multidisciplinary clinicresultsinbetteroutcomes(4, 5).EUGOGO isaware that many patients with GO in Europenever reach specialist centres or are referred toolate to benefit from treatments (6), which results ina suboptimal outcome and sometimes loss of vision.EUGOGO recommends that primary care physicians,general practitioners, general internists and special-ists, who have no particular expertise in managingsuch patients, should refer all but the mildest casesof GO to tertiary centres with established multi-disciplinary clinics for further assessment andmanagement. Selecting which patients should bereferred and with what degree of urgency, ischallenging for the generalist. EUGOGO proposes asimple clinical tool, which can be completed in lessthan 5 minutes by any medically qualified personand can help to identify patients who merit urgentor routine referral (Table 1).
- Published
- 2006
132. A questionnaire survey on the management of Graves' orbitopathy in Europe
- Author
-
P Perros, L Baldeschi, K Boboridis, A J Dickinson, A Hullo, G J Kahaly, P Kendall-Taylor, G E Krassas, C M Lane, J H Lazarus, C Marcocci, M Marino, M P Mourits, M Nardi, J Orgiazzi, A Pinchera, S Pitz, M F Prummel, W M Wiersinga, Ophthalmology, AII - Amsterdam institute for Infection and Immunity, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, and Endocrinology
- Subjects
medicine.medical_specialty ,Decompression ,Endocrinology, Diabetes and Metabolism ,Graves' disease ,MEDLINE ,Cushingoid ,Health Services Accessibility ,Iodine Radioisotopes ,Optic neuropathy ,Endocrinology ,Multidisciplinary approach ,Surveys and Questionnaires ,Internal medicine ,medicine ,Humans ,Referral and Consultation ,Patient Care Team ,business.industry ,Public health ,Questionnaire ,General Medicine ,Decompression, Surgical ,medicine.disease ,Europe ,Graves Ophthalmopathy ,Health Care Surveys ,Practice Guidelines as Topic ,Thyroidectomy ,Steroids ,business ,Orbit - Abstract
Objective: To determine management patterns among clinicians who treat patients with Graves’ orbitopathy (GO) in Europe. Design and methods: Questionnaire survey including a case scenario of members of professional organisations representing endocrinologists, ophthalmologists and nuclear medicine physicians. Results: A multidisciplinary approach to manage GO was valued by 96.3% of responders, although 31.5% did not participate or refer to a multidisciplinary team and 21.5% of patients with GO treated by responders were not managed in a multidisciplinary setting. Access to surgery for sight-threatening GO was available only within weeks or months according to 59.5% of responders. Reluctance to refer urgently to an ophthalmologist was noted by 32.7% of responders despite the presence of suspected optic neuropathy. The use of steroids was not influenced by the age of the patient, but fewer responders chose to use steroids in a diabetic patient (72.1 vs 90.5%, P < 0.001). Development of cushingoid features resulted in a reduction in steroid use (90.5 vs 36.5%, P < 0.001) and increase in the use of orbital irradiation (from 23.8% to 40.4%, P < 0.05) and surgical decompression (from 20.9 to 52.9%, P < 0.001). More ophthalmologists chose surgical decompression for patients with threatened vision due to optic neuropathy, who were intolerant to steroids than other specialists (70.3 vs 41.8%, P < 0.01). Conclusion: Deficiencies in the management of patients with GO in Europe were identified by this survey. Further training of clinicians, easier access of patients to specialist multidisciplinary centres and the publication of practice guidelines may help improve the management of this condition in Europe.
- Published
- 2006
133. Use of β-Blockers in Pulmonary Hypertension.
- Author
-
Perros, Frédéric, de Man, Frances S., Bogaard, Harm J., Antigny, Fabrice, Simonneau, Gérald, Bonnet, Sébastien, Provencher, Steeve, Galiè, Nazzareno, and Humbert, Marc
- Abstract
Contrasting with the major attention that left heart failure has received, right heart failure remains understudied both at the preclinical and clinical levels. However, right ventricle failure is a major predictor of outcomes in patients with precapillary pulmonary hypertension because of pulmonary arterial hypertension, and in patients with postcapillary pulmonary hypertension because of left heart disease. In pulmonary hypertension, the status of the right ventricle is one of the most important predictors of both morbidity and mortality. Paradoxically, there are currently no approved therapies targeting the right ventricle in pulmonary hypertension. By analogy with the key role of β-blockers in the management of left heart failure, some authors have proposed to use these agents to support the right ventricle function in pulmonary hypertension. In this review, we summarize the current knowledge on the use of β-blockers in pulmonary hypertension. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
134. ESCOMPTE experiment: intercomparison of four aircraft dynamical, thermodynamical, radiation and chemical measurements
- Author
-
T. Hofherr, P. Perros, Andreas Wieser, Christoph Kottmeier, Ulrich Corsmeier, Frédérique Saïd, Norbert Kalthoff, Marie Lothon, Laboratoire d'aérologie (LA), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'aérologie (LAERO), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] ,Atmospheric Science ,Aircraft wind measurements ,010504 meteorology & atmospheric sciences ,Meteorology ,business.industry ,Chemical measurement ,Turbulence ,Aircraft chemical measurements ,Atmospheric turbulence ,010501 environmental sciences ,Radiation ,01 natural sciences ,ESCOMPTE ,Trace gas ,Boundary layer ,13. Climate action ,Homogeneous ,Global Positioning System ,Environmental science ,business ,Inertial navigation system ,0105 earth and related environmental sciences - Abstract
International audience; Among seven airplanes involved in the Experience sur Site pour COntraindre les Modèles de Pollution atmosphérique et de Transport d'Emission (ESCOMPTE) experiment in 2001, four measured classical meteorological parameters, radiation fluxes, trace gases and turbulence (for three among four): the Dornier 128 from the Institut für Meteorologie und Klimaforschung, the Fokker 27 ARAT from the Institut National des Sciences de l'Univers, the Merlin 4 and Piper Aztec 23 from Météo France. This paper presents the results of intercomparison flights between three pairs of aircraft. The results are very similar for mean parameters except for the horizontal wind measurements provided by the Merlin that showed a problem that is probably linked to the measurement of the aircraft velocity. Further investigation is required to know whether corrections are possible or not for these wind measurements. Turbulence is studied along two legs over a flat and homogeneous area: in spite of the heterogeneity of the measured functions (one leg is close to the top of the boundary layer), the comparison is rather good. The relative accuracy of the data provided to the data base is given. It easily allows to use the huge amount of aircraft data collected during the experiment with very few restrictions. We underline some points where efforts should be borne for future experiments: wind coupling between Inertial Navigation System data and Global Positioning System (GPS) data, CO and NOx measurements.
- Published
- 2005
135. Mesoscale circulation systems and ozone concentrations during ESCOMPTE : a case study from IOP 2b
- Author
-
E. Frejafon, Norbert Kalthoff, P. Perros, Frédérique Saïd, Christoph Kottmeier, Jutta Thürauf, Ulrich Corsmeier, Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT), Laboratoire d'aérologie (LA), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut National de l'Environnement Industriel et des Risques (INERIS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
Atmospheric Science ,Ozone ,010504 meteorology & atmospheric sciences ,Planetary boundary layer ,Mesoscale meteorology ,010501 environmental sciences ,Noon ,Atmospheric sciences ,01 natural sciences ,Convective Boundary Layer ,chemistry.chemical_compound ,Sea breeze ,11. Sustainability ,0105 earth and related environmental sciences ,[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] ,Marseille city plume ,Advection ,ESCOMPTE ,Plume ,Mesoscale circulation systems ,chemistry ,13. Climate action ,Climatology ,Environmental science ,Summer smog - Abstract
International audience; The main objective of ‘Expérience sur Site pour COntraindre les Modèles de Pollution atmosphérique et de Transport d'Emissions' (ESCOMPTE) is to generate a relevant data set for testing and evaluating mesoscale chemistry-transport models (CTMs). During ESCOMPTE, measurements have been performed at numerous surface stations, by radars and lidars, and several aircraft in the planetary boundary layer. The data from these different sources have been merged to obtain a consistent description of the spatial distribution of wind, temperature, humidity, and ozone for the photosmog episode on June 25, 2001 (IOP 2b). On this day, moderate synoptic winds favour the evolution of different mesoscale circulation systems. During daytime, the sea breeze penetrates towards the north in the Rhône valley. As the winds above the sea breeze layer come from the east, polluted air from the metropolitan area of Marseille leads to an increase of ozone at elevated layers above the convective boundary layer (CBL). At the mountainous station of Luberon about 55 km north of Marseille around noon, when the CBL top surpasses the height of the mountain summit, polluted air with ozone concentrations of about 120 ppbv arrived from southerly directions, thus indicating the passage of the city plume of Marseille. At Cadarache and Vinon in the Durance valley, about 60 km inland, the ozone maximum at the surface and at flight level 920 m MSL appears between 14 and 15 UTC. At this time, southwesterly valley winds prevail in the valley, while southerly winds occur above. This finding highlights the height-dependent advection of ozone due to interacting mesoscale circulation systems. These dynamical processes need to be represented adequately in CTMs to deliver a realistic description of the ozone concentration fields.
- Published
- 2005
136. Pollution atmosphérique gazeuse - Mesure des gaz
- Author
-
Pierre Masclet, P. Perros, Alain Person, Gérard Toupance, and Yvon Le Moullec
- Abstract
A defaut d'etre completement exhaustif, cet article traite la majorite des polluants d'interet qui sont presents en phase gazeuse dans la basse couche de la troposphere, de la proximite des sources aux regions eloignees ou sejournent en faibles traces des substances persistantes et des sous-produits induits par reactions (photo)chimiques. Les composes decrits dans cet article presentent de l'interet pour des raisons tres diverses: soit ce sont des traceurs de source, soit ils retiennent l'attention en raison de leur impact sur la sante et/ou sur l'ecosysteme. Leur suivi peut aussi s'inscrire dans d'autres demarches telles que la comprehension des mecanismes reactionnels et le support a la modelisation des phenomenes. De ce fait, le domaine des concentrations couvert est tres etendu: si les preoccupations sont le plus souvent de repondre a des limites de detection de l'ordre de la partie par billion (ppbv), pour certaines substances, les exigences peuvent etre plus severes puisqu'il faudra s'orienter vers des techniques capables de quantifier au niveau de la partie par trillion (pptv), voire moins. Certains polluants sont qualifies de « semi-volatils », c'est-a-dire qu'ils ont la propriete d'etre presents en phase gazeuse et aussi dans les particules en suspension dans l'air. Il a ete choisi d'integrer a cet article les hydrocarbures aromatiques polycycliques et les dioxines qui possedent cette particularite. Pour chaque compose, on donne successivement et brievement les sources et les proprietes, puis les differentes techniques utilisables, en renvoyant le lecteur si necessaire aux principes generaux traites dans l'article [P 4 030], les recommandations plus techniques de mise en œuvre etant presentees dans l'article [P 4 032]. Le lecteur interesse pourra aussi se reporter a la rubrique Air du traite Environnement des Techniques de l'Ingenieur [19].
- Published
- 2004
137. The ESCOMPTE program : an overview
- Author
-
Vincent-Henri Peuch, E. Frejafon, G. Toupance, J.L. Ponche, D. Robin, Henri Wortham, Pierre Durand, Philippe Drobinski, Frédérique Saïd, P. Perros, Christoph Kottmeier, Hélène Cachier, B. Cros, Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National de l'Environnement Industriel et des Risques (INERIS), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), Université du Littoral Côte d'Opale (ULCO), AIRMARAIX, Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Pierre-Simon-Laplace (IPSL), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Forschungszentrum Karlsruhe and Universität Karlsruhe, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Image, Ville, Environnement (LIVE), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Regional Network for Air Quality Monitoring, Atmo-PACA, Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), École normale supérieure - Paris (ENS Paris), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire d'aérologie (LA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale, and Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)
- Subjects
Atmospheric Science ,Emission inventories ,010504 meteorology & atmospheric sciences ,Meteorology ,Urban climatology ,Air pollution ,010501 environmental sciences ,medicine.disease_cause ,7. Clean energy ,01 natural sciences ,Mediterranean area ,law.invention ,Troposphere ,law ,11. Sustainability ,medicine ,Air quality index ,CHERNISTRY-TRANSPORT MODELING ,0105 earth and related environmental sciences ,Chemistry-transport modeling ,[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] ,Photo-oxidant ,IOPS ,ESCOMPTE ,Trace gas ,Lidar ,13. Climate action ,[SDE]Environmental Sciences ,Radiosonde ,Environmental science - Abstract
International audience; In this paper, the "Experience sur Site pour COntraindre les Modeles de Pollution atmospherique et de Transport d'Emissions" (ESCOMPTE) program is presented. The ESCOMPTE program is used to produce a relevant set of data for testing and evaluating regional pollution models. It includes high-resolution (in space and time) atmospheric emission inventories and field experiments, and covers an area of 120 X 120 km, centered over the Marseilles-Berre area in the southeast of France during Summer 2001. This region presents a high occurrence of photochemical pollution events, which result from numerous industrial and urban sources of primary pollutants. From the dynamical characteristics of the area, sea-breeze circulation and channeling effects due to terrain features highly influence the location of the pollutant plumes. ESCOMPTE will provide a highly documented framework for dynamics and chemisty studies. Campaign strategies and experimental set up are described. During the planning phase, existing modeling results helped defining the experimental design. The campaign involved surface measurement networks, remote sensing, ship-borne, balloon-borne, and airplane measurements. Mean standard meteorological parameters and turbulent fluxes, ozone, ozone precursors, photochemically active trace gases, and aerosols were measured. Five intensive observation periods (IOPs) were documented using a wide spectrum of instruments, involving aircraft (7) (one of them equipped with a Doppler lidar, the others for in situ meteorological and chemical measurements), constant volume balloons (33), ozone lidars (5), wind profilers (15 sodars and radars), Doppler scanning lidar (1), radiosonde systems (at 4 locations), instrumented ships (2). In addition to the air quality networks from environmental agencies, 15 supplementary ground stations equipped for chemistry and/or meteorology and/or surface flux measurements, were operational. All instruments were calibrated and compared during a Quality Control/Quality Assurance (QC/QA) week, at the very beginning of the campaign. Fifteen days were intensively documented during five IOPs, referenced as 1, 2a, 2b, 3, and 4. High pollution levels were encountered during sea-breeze conditions observed during IOPs 2b and 3, whereas IOPs 2a and 4 corresponded to moderate wind, and channeled plume regimes. In addition, hourly emissions inventories for all IOPs were established to complete data sets and to finalize the ESCOMPTE database (EDB). Two other projects were associated to ESCOMPTE: urban boundary layer (UBL) and tropospheric water vapor content by GPS tomography (GPS/H2O). They took advantage of the scientific environment provided by ESCOMPTE.
- Published
- 2004
138. Glucocorticoids in the medical management of Graves' ophthalmopathy
- Author
-
R H, Hart and P, Perros
- Subjects
Cohort Studies ,Male ,Clinical Trials as Topic ,Evidence-Based Medicine ,Injections, Intravenous ,Administration, Oral ,Exophthalmos ,Humans ,Female ,Glucocorticoids ,Graves Disease ,Immunosuppressive Agents ,Autoimmune Diseases - Abstract
Graves' ophthalmopathy (GO) is a challenging disease that poses therapeutic dilemmas for endocrinologists and ophthalmologists. Progress in medical therapy has been slow. Numerous new treatments have been reported to have a beneficial effect. However, current evidence indicates that glucocorticoids (GC) represent the only class of drug therapy which either in isolation or combined with other therapies has an unequivocal role in the routine clinical management of patients with GO. Recent advances include better definition of factors predictive of response to treatment and the formulation of specific GC regimens that combine high efficacy with a low risk of unwanted side-effects.
- Published
- 2003
139. Do diabetes guidelines influence the content of referral letters by general practitioners to a diabetes specialist clinic?
- Author
-
J M, Idiculla, P, Perros, and B M, Frier
- Subjects
Diabetic Retinopathy ,Diabetes Mellitus, Type 2 ,Practice Guidelines as Topic ,Humans ,Medicine ,Interdisciplinary Communication ,Family Practice ,Correspondence as Topic ,Referral and Consultation ,Specialization - Abstract
To ascertain whether local guidelines for diabetes management influence the content of GP referral letters to a diabetes specialist clinic.Retrospective survey of hospital outpatient clinic casenotes and GP referral letters of patients with Type 2 diabetes.An examination was made of 200 GP referral letters submitted before (Set 1), and 200 GP referral letters submitted after (Set 2), local guidelines on the management of adult diabetes had been issued to GPs in Lothian. The frequency with which micro- and macrovascular complications of diabetes were documented in the GP referral letters was compared with the frequency ascertained at the first attendance to the specialist clinic.Following the distribution of diabetes guidelines, no significant change was noted in the frequency with which specific conditions were documented in GP referral letters (Set 1 vs Set 2): hypertension (72% vs 79%); cerebrovascular disease (89% vs 80%); ischaemic heart disease (74% vs 79%); peripheral vascular disease (42% vs 64%); cataract (35% vs 44%); retinopathy (18% vs 40%) and peripheral neuropathy (17% vs 12%). At the diabetic clinic many unreported diabetic complications were found in patients who had been referred after varying periods of treatment in primary care. However, the guidelines did appear to have encouraged the active treatment of hyperglycaemia by GPs before referral of newly-diagnosed diabetic patients.Diabetes guidelines per se appeared to have very little effect on increasing the information provided in GP referral letters on relevant medical problems and did not appear to have influenced screening for complications in patients with Type 2 diabetes by GPs before specialist referral. Methods other than the issue of written guidelines are required to achieve optimal assessment of diabetic patients in the community.
- Published
- 2003
140. CTLA4 gene and Graves' disease: association of Graves' disease with the CTLA4 exon 1 and intron 1 polymorphisms, but not with the promoter polymorphism
- Author
-
B, Vaidya, E J C, Oakes, H, Imrie, A J, Dickinson, P, Perros, P, Kendall-Taylor, and S H S, Pearce
- Subjects
Male ,Immunoconjugates ,Polymorphism, Genetic ,Exons ,Antigens, Differentiation ,Graves Disease ,Introns ,Linkage Disequilibrium ,Abatacept ,Antigens, CD ,Case-Control Studies ,Humans ,CTLA-4 Antigen ,Female ,Promoter Regions, Genetic ,Follow-Up Studies - Abstract
Recent studies have shown that Graves' disease (GD) is linked to and associated with alleles of the cytotoxic T lymphocyte antigen-4 (CTLA4) locus. However, the true pathogenic polymorphism(s) at this locus remains uncertain. Moreover, the association studies of the promoter CTLA4(-318)C/T polymorphism in white GD populations have produced conflicting results. Therefore, we have analysed three CTLA4 single nucleotide polymorphisms, including promoter CTLA4(-318)C/T, exon 1 CTLA4(49)A/G and intron 1 CTLA4(1822)C/T in our GD cohort from the UK.We studied 301 white patients with GD and 349 healthy ethnically matched local controls. Amongst GD probands, 129 had significant thyroid-associated orbitopathy (TAO; NOSPECS class III or worse). The CTLA4(-318)C/T, CTLA4(49)A/G and CTLA4(1822)C/T polymorphisms were genotyped by using the restriction enzymes MseI, Bst71I and HaeIII, respectively.We found no association between GD and alleles of CTLA4(-318)C/T. GD was found to be associated with the G allele of CTLA4(49)A/G[P = 5.9 x 10(-6), odds ratio (OR) 1.65] and the T allele of CTLA4(1822)C/T (P = 7.7 x 10(-6), OR 1.64). The frequencies of these alleles were significantly higher in GD probands with significant TAO than in those without TAO (G allele: P = 0.001, OR 1.68; T allele: P = 0.001, OR 1.70).The promoter CTLA4(-318)C/T polymorphism is not in linkage disequilibrium with the pathogenic polymorphism(s) at the CTLA4 locus. The alleles of both the exon 1 CTLA4(49)A/G and the intron 1 CTLA4(1822)C/T polymorphisms are associated with GD, which is stronger in patients with TAO.
- Published
- 2003
141. A synthesis of the Air Pollution over the Paris Region (ESQUIF) field campaign
- Author
-
Marie-Pierre Lefebvre, Gérard Toupance, Gérard Mégie, P. Perros, Dominique Gombert, P. Flamant, Dieter Kley, Robert Vautard, Daniel Martin, Patrick Chazette, Matthias Beekmann, Daniel Guedalia, Laurent Menut, Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Chimie Atmosphérique Expérimentale (CAE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), AIRPARIF - Surveillance de la qualité de l'air en Île-de-France, Laboratoire d'aérologie (LAERO), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association, Météo France, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Météo-France Direction Interrégionale Sud-Est (DIRSE), Météo-France, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
Pollution ,Atmospheric Science ,010504 meteorology & atmospheric sciences ,Meteorology ,media_common.quotation_subject ,Monte Carlo method ,Air pollution ,Soil Science ,010501 environmental sciences ,Aquatic Science ,Oceanography ,medicine.disease_cause ,01 natural sciences ,Troposphere ,Data assimilation ,Geochemistry and Petrology ,11. Sustainability ,Earth and Planetary Sciences (miscellaneous) ,medicine ,Field campaign ,0105 earth and related environmental sciences ,Earth-Surface Processes ,Water Science and Technology ,media_common ,[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] ,Ecology ,Paleontology ,Forestry ,IOPS ,Boundary layer ,Geophysics ,13. Climate action ,Space and Planetary Science ,Environmental science - Abstract
[1] Tropospheric photooxidant pollution was investigated in detail for the first time over the Paris area during the Air Pollution Over the Paris Region (ESQUIF) project. From 1998 to 2000, 12 intensive observation periods (IOPs) were carried out. They represented various meteorological situations, all leading to strong polluted events over Paris and its surroundings. During these periods, measurements were performed with a new strategy of circular flights around the city, coupled to stations or remote sensing surface measurements. Such data obtained at various altitudes and at different ranges from the city center document the evolution of pollution events on horizontal and vertical scales. In addition, ESQUIF also allowed for the evaluation of models developed in parallel to the project. In this overview, ESQUIF is presented in terms of the set of IOPs. Periods are compared in terms of meteorology and resulting types of pollution episodes. The occurrence of these latter events is discussed in terms of local production and influence of long-range transport. Using both measurements and model simulations, some important results are highlighted, especially concerning accuracy of boundary conditions, processes of mixing within the boundary layer, surface emissions estimation (including biogenic), and photolysis attenuation. Finally, results from data assimilation studies and sensitivity studies using adjoint modeling and a Monte Carlo approach are also presented.
- Published
- 2003
142. Assessment of normal reference values for thyroid uptake of technetium-99m pertechnetate in a single centre UK population
- Author
-
Macauley, Mavin, Shawgi, Mohamed, Ali, Tamir, Curry, Andrew, Howe, Kim, Howell, Elizabeth, Jefferson, Elizabeth, James, Andrew, Perros, Petros, and Petrides, George S.
- Published
- 2018
- Full Text
- View/download PDF
143. NMDA-Type Glutamate Receptor Activation Promotes Vascular Remodeling and Pulmonary Arterial Hypertension
- Author
-
Dumas, Sébastien J., Bru-Mercier, Gilles, Courboulin, Audrey, Quatredeniers, Marceau, Rücker-Martin, Catherine, Antigny, Fabrice, Nakhleh, Morad K., Ranchoux, Benoit, Gouadon, Elodie, Vinhas, Maria-Candida, Vocelle, Matthieu, Raymond, Nicolas, Dorfmüller, Peter, Fadel, Elie, Perros, Frédéric, Humbert, Marc, and Cohen-Kaminsky, Sylvia
- Abstract
Supplemental Digital Content is available in the text.
- Published
- 2018
- Full Text
- View/download PDF
144. Sirtuin 1 regulates pulmonary artery smooth muscle cell proliferation: role in pulmonary arterial hypertension
- Author
-
Zurlo, Giada, Piquereau, Jérôme, Moulin, Maryline, Pires Da Silva, Julie, Gressette, Mélanie, Ranchoux, Benoît, Garnier, Anne, Ventura-Clapier, Renée, Fadel, Elie, Humbert, Marc, Lemaire, Christophe, Perros, Frédéric, and Veksler, Vladimir
- Abstract
Supplemental Digital Content is available in the text
- Published
- 2018
- Full Text
- View/download PDF
145. Mycophenolate plus methylprednisolone versus methylprednisolone alone in active, moderate-to-severe Graves' orbitopathy (MINGO): a randomised, observer-masked, multicentre trial
- Author
-
Kahaly, George J, Riedl, Michaela, König, Jochem, Pitz, Susanne, Ponto, Katharina, Diana, Tanja, Kampmann, Elena, Kolbe, Elisa, Eckstein, Anja, Moeller, Lars C, Führer, Dagmar, Salvi, Mario, Curro, Nicola, Campi, Irene, Covelli, Danila, Leo, Marenza, Marinò, Michele, Menconi, Francesca, Marcocci, Claudio, Bartalena, Luigi, Perros, Petros, Wiersinga, Wilmar M, Ayvaz, Göksun, Baldeschi, Lelio, Boborides, Kostas, Boschi, Antonella, Brix, Thomas H, Clarke, Lucy, Dayan, Colin, Daumerie, Chantal, Dickinson, A Jane, Fichter, Nicole, Hegedüs, Laszlo, Konuk, Onur, Krassas, Gerassimos E, Lane, Carol, Lazarus, John, Morris, Dan S, Mourits, Maarten., Nardi, Marco, Neoh, Chris, Orgiazzi, Jacques, Pearce, Simon H S, von Arx, Georg, and Zarkovic, Milos
- Abstract
European guidelines recommend intravenous methylprednisolone as first-line treatment for active and severe Graves' orbitopathy; however, it is common for patients to have no response or have relapse after discontinuation of treatment. We aimed to compare the efficacy and safety of add-on mycophenolate to methylprednisolone in comparison with methylprednisolone alone in patients with moderate-to-severe Graves' orbitopathy.
- Published
- 2018
- Full Text
- View/download PDF
146. Controversies in the clinical evaluation of active thyroid-associated orbitopathy: use of a detailed protocol with comparative photographs for objective assessment
- Author
-
A J, Dickinson and P, Perros
- Subjects
Ocular Motility Disorders ,Clinical Protocols ,Optic Nerve Diseases ,Eyelid Diseases ,Photography ,Exophthalmos ,Humans ,Severity of Illness Index ,Conjunctival Diseases ,Graves Disease - Abstract
Despite many learned publications over recent decades, the assessment of active thyroid-associated orbitopathy (TAO) remains difficult and controversial. There are no biochemical, immunological or imaging investigations which can identify active disease reliably, and clinical assessment is still of paramount importance. We therefore review the strengths and weaknesses of all methods of clinical assessment. A new atlas for clinical assessment of soft tissue signs has been developed, and its reproducibility assessed. It details a suggested protocol that could help standardize descriptions of TAO and allow more objective assessment of its activity and severity. This is relevant to general endocrinologists, who have a crucial role in the identification of patients who require ophthalmological assessment. Certain aspects are more relevant to ophthalmologists and endocrinologists who have a special clinical and research interest in TAO. Unless a reproducible system of assessment is devised and widely adopted, it will remain difficult to interpret research meaningfully, particularly if results appear to contradict.
- Published
- 2001
147. Management of a pregnant patient with Graves' disease complicated by thionamide-induced neutropenia in the first trimester
- Author
-
S, Davison, T W, Lennard, J, Davison, P, Kendall-Taylor, and P, Perros
- Subjects
Adult ,Male ,Neutropenia ,Infant, Newborn ,Pregnancy Outcome ,Graves Disease ,Pregnancy Complications ,Pregnancy Trimester, First ,Antithyroid Agents ,Pregnancy ,Propylthiouracil ,Pregnancy Trimester, Second ,Thyroidectomy ,Humans ,Female - Abstract
A 31-year-old woman presented with neutropenia due to thionamide drug therapy for Graves' disease. She also reported 8 weeks of amenorrhoea and had a positive pregnancy test. Her drug therapy was discontinued and her neutropenia resolved uneventfully. The hyperthyroidism recurred a week later. After consideration of all treatment options, it was decided to observe until 14 weeks when an elective thyroidectomy was planned. Mother and fetus were monitored closely and both tolerated moderate hyperthyroidism well. At 14 weeks the patient underwent a total thyroidectomy after rendering her euthyroid with a short course of sodium ipodate. Labour was induced at 41 weeks. Delivery was complicated by fetal distress and precipitated a forceps delivery. A 3250 g male infant was born with poor Apgar score and required 2 h of ventilation. At 1 year, the child had reached all developmental milestones at appropriate times. Both mother and fetus may tolerate moderate thyrotoxicosis well in early pregnancy, an alternative that should be considered when thionamide drug therapy is contraindicated.
- Published
- 2001
148. Evidence for a Graves' disease susceptibility locus at chromosome Xp11 in a United Kingdom population
- Author
-
H, Imrie, B, Vaidya, P, Perros, W F, Kelly, A D, Toft, E T, Young, P, Kendall-Taylor, and S H, Pearce
- Subjects
Chromosomes, Human, Pair 14 ,Genetic Markers ,Immunoconjugates ,Polymorphism, Genetic ,X Chromosome ,Genetic Linkage ,Thyroiditis, Autoimmune ,Chromosome Mapping ,Receptors, Thyrotropin ,Antigens, Differentiation ,Polymerase Chain Reaction ,Graves Disease ,Statistics, Nonparametric ,United Kingdom ,Nuclear Family ,Abatacept ,Major Histocompatibility Complex ,Antigens, CD ,Chromosomes, Human, Pair 2 ,Humans ,CTLA-4 Antigen ,Genetic Predisposition to Disease ,Microsatellite Repeats - Abstract
Graves' disease (GD), which has a strong female preponderance (female/male ratio,5:1), is inherited as a complex genetic trait. Loci for GD have started to be defined using genome-wide approaches for genetic linkage. To date, 3 loci have been confirmed in at least 2 cohorts of GD patients, the strongest effect being at the cytotoxic T lymphocyte antigen-4 (CTLA-4) locus on chromosome 2q33 in our population. Two other loci for GD have recently been proposed, but not confirmed, on chromosomes Xq21 (GD3) and 14q31 (GD1). We studied a cohort of 75 sibling pairs with GD from the United Kingdom for linkage to 12 markers over a 83-cM region of the X chromosome and for 8 markers over a 36-cM region of 14q31-q33. A peak multipoint nonparametric linkage score of 2.21 (P = 0.014) was found at marker DXS8083 on Xp11, which increased to a nonparametric linkage score of 3.18 (P = 0.001) in data that had been conditioned for allele sharing at the CTLA-4 locus under an epistatic model. There was no evidence to support linkage of GD to Xq21.33-q22 (GD3) or at the 14q31-q33 (GD1) region in our population. A locus with a moderate contribution to GD susceptibility (lambda(s) = 1.4) is likely to exist in the Xp11 region, but we are unable to confirm that the GD1 or the GD3 regions contain major susceptibility loci in our United Kingdom GD population.
- Published
- 2001
149. Anti-thyroid drug treatment before radioiodine in patients with Graves' disease: soother or menace?
- Author
-
P, Perros
- Subjects
Iodine Radioisotopes ,Antithyroid Agents ,Humans ,Combined Modality Therapy ,Graves Disease - Published
- 2000
150. Elevated serum growth hormone in a patient with Type 1 diabetes: a diagnostic dilemma
- Author
-
O M, Herlihy and P, Perros
- Subjects
Adenoma ,Adult ,Blood Glucose ,Male ,Diabetes Mellitus, Type 1 ,Human Growth Hormone ,Acromegaly ,Humans ,Insulin ,Pituitary Neoplasms ,Glucose Tolerance Test ,Octreotide ,Algorithms - Abstract
The biochemical confirmation of acromegaly is rarely difficult and is based on an elevated fasting serum growth hormone (GH) concentration, which fails to suppress in response to an oral glucose load. Impaired glucose tolerance and Type 2 diabetes are common in patients with acromegaly, however the development of acromegaly in a patient with pre-existing Type 1 diabetes has not been well documented. Poorly controlled Type 1 diabetes in non-acromegalic patients is associated with dysregulation of the hypothalamic-GH/insulin-like growth factor-1 (IGF-1) axis, leading to elevation of serum GH concentrations. Therefore the diagnosis of acromegaly in a Type 1 diabetic patient may be fraught with practical difficulties in performing and interpreting the results of an oral glucose tolerance test (OGTT) and other biochemical investigations. When, in addition, the clinical and radiological features of acromegaly are equivocal, the clinician is faced with a formidable diagnostic challenge. In this paper we report such a case, review the pathophysiology of hypersomatotrophinaemia in poorly controlled Type 1 diabetes, and recommend a diagnostic algorithm for the investigation of acromegaly in patients with diabetes.
- Published
- 2000
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.