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1.
J Neuroradiol ; 48(4): 271-276, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31034897

RESUMO

PURPOSE: Characterize and determine the frequency of dissections of the supra-aortic arteries (SAA) and injuries to the cervical spine and pharyngolaryngeal cartilages viewed on CT scans after an attempted suicide by hanging. MATERIALS AND METHODS: A retrospective, single-centre study of all patients admitted for attempted suicide by hanging between January 2010 and June 2017 who received CT angiography of the SAA. Search for signs of dissection of the cervical arteries and injuries to the brain, spinal column and pharyngeal and laryngeal cartilages. The results were compared with the initial clinical severity, which was assessed indirectly by whether patients were initially admitted in an intensive care unit (ICU) or in an emergency department (ED). RESULTS: Out of 162 patients included, 4 presented with SAA dissection (2.5%), comprising 3 vertebral arteries and 1 external carotid artery. The cases in question were of 4 men, all in cardiac arrest on arrival and all were treated in ICU. Of the most serious cases, 18/72 (25%) had anoxia-related injuries and one also presented with a C2 fracture. No vascular lesions or signs of cerebral anoxia were observed in the 90 ED patients. Nevertheless, pharyngeal and laryngeal fractures were observed in both groups, with no significant difference. CONCLUSION: In our study, 2.5% of CT angiograms performed after an attempted hanging revealed SAA dissection. Crucially, only most severe patients, who have been immediately admitted to ICU suffered SAA. These results call into question the systematic indication of this exam in cases of hanging attempts.


Assuntos
Lesões do Pescoço , Tentativa de Suicídio , Artérias , Angiografia por Tomografia Computadorizada , Humanos , Masculino , Estudos Retrospectivos
2.
Rev Med Liege ; 76(3): 142-144, 2021 Mar.
Artigo em Francês | MEDLINE | ID: mdl-33682380

RESUMO

Presence of air in the spinal canal, called pneumorrhachis (PR) is a rare and likely unrecognized condition often due to traumatic or iatrogenic causes. Most of PR occur after repeated epidural ponction or penetrating trauma or brutal intra-alveolar increase especially in asthma attack. Non traumatic and non iatrogenic causes are uncommon but can appear in a neoplastic context.


La présence d'air dans le canal spinal, ou pneumorachis (PR), est une entité rare, souvent méconnue, habituellement de nature traumatique ou iatrogénique. Le PR survient essentiellement à la suite de ponctions épidurales répétées, d'un traumatisme pénétrant ou d'une majoration brutale de la pression intra-alvéolaire, notamment lors d'une crise asthmatique. Le PR non traumatique et non iatrogénique est excessivement rare, survenant alors volontiers dans un contexte néoplasique.


Assuntos
Asma , Pneumorraque , Humanos , Pneumorraque/diagnóstico por imagem , Pneumorraque/etiologia , Canal Medular/diagnóstico por imagem
3.
Prog Urol ; 28(2): 107-113, 2018 Feb.
Artigo em Francês | MEDLINE | ID: mdl-29337127

RESUMO

INTRODUCTION: Acute urinary retention (AUR) is a common reason for emergency consultation. It may be spontaneous or precipitated and affects both men and women. The purpose of this study was to determine the profile of men visiting emergency departments for an AUR. MATERIEL AND METHODS: A retrospective monocentric study including all men who consulted the emergency department between January 2014 and December 2016 for AUR was conducted. RESULTS: In 3 years, 731 patients were admitted for AUR (611 men and 120 women). The mean age was 71.6±14 years with a mean retention volume of 948±668mL drained for 96% of patients (n=584) through a bladder catheter and 4% (n=27) with a suprapubic catheter. Most patients had an urological (66%, n=104) or neurologic (40%, n=242) history and 23% (n=136) already had an episode of AUR. In 28% of cases (n=173), the globe was not painful. A majority of AUR were spontaneous, 53% (n=326) versus 46% (n=279) who were precipitated, secondary to a recent surgical procedure (<1 month) (15%, n=89), hematuria (9%, n=54), or male urinary tract infections (7%, n=42). Patients were treated externally in 71% (n=436), 25% (n=153) were hospitalized with significantly more comorbidities. CONCLUSION: Men consulting emergency for AUR are 72 years old, with a globe volume of 942mL. Thirty-three percent have a history of BPH, with a prostate treatment like alpha-blockers type. Almost all patients were treated with a bladder catheter and the majority was treated externally. LEVEL OF EVIDENCE: 4.


Assuntos
Tratamento de Emergência/estatística & dados numéricos , Encaminhamento e Consulta/estatística & dados numéricos , Retenção Urinária/epidemiologia , Doença Aguda , Idoso , Humanos , Masculino , Estudos Retrospectivos
4.
Encephale ; 40(4): 289-94, 2014 Sep.
Artigo em Francês | MEDLINE | ID: mdl-24815791

RESUMO

BACKGROUND: Borderline personality disorder (BPD) is characterized by a pervasive pattern of instability and impulsivity. There is a high prevalence of BPD patients among those admitted to the emergency department for suicide attempts. However, little empirical research exists to assist clinicians in deciding whether to hospitalize a suicidal patient. Some authors have argued that hospitalization does not prevent suicide and could actually harm these patients, thereby leading to psychosocial regression. Parasuicidal behaviors could be reinforced by the attention given during hospitalization. OBJECTIVE: Our purpose was to determine whether the hospitalization of suicidal patients who have a high risk of BPD after discharge from the emergency department is associated with a recurrence of suicidal behavior at 6months. METHOD: We designed a prospective study, acquiring patients from three emergency hospitals. The participants were suicidal subjects admitted for voluntary drug intoxication and were 18years of age or older. The participants completed the Personality Disorder Questionnaire (PDQ-4+) to assess BPD symptomatology. Information on the recurrence of suicidal behavior at 6months was obtained by interview of patients and the review of the charts from the 3 hospitals involved in the study. Other assessments included the BDI-13 (severity of depression), the Hopelessness Scale (hopelessness), the TAS-20 (alexythymia), the AUDIT (alcohol disorder) and the MINI (axis I disorders). RESULTS: A total of 606 subjects admitted for a suicide attempt participated in this study. A total of 320 (52.8 %) of the subjects completed the PDQ-4+. The sample was divided into three groups: participants at high risk of having at least one BPD (n=197), a group at high risk of having at least one non-BPD PD (n=84) and a group with low risk of having a PD (n=39). Hospitalization following an emergency was not associated with a recurrence of suicide attempts at 6months among patients at high risk of BPD. A logistical regression analysis showed pre-hospitalization antidepressant prescription to be associated with recidivism (OR=2.1, P=.037). CONCLUSION: Our exploratory study suggests that hospitalization may not increase suicide attempts among patients with BPD when the health organization does not include a specific device such as DBT.


Assuntos
Transtorno da Personalidade Borderline/psicologia , Transtorno da Personalidade Borderline/terapia , Internação Compulsória de Doente Mental , Serviços de Emergência Psiquiátrica , Tentativa de Suicídio/psicologia , Adulto , Antidepressivos/efeitos adversos , Antidepressivos/uso terapêutico , Atenção , Transtorno da Personalidade Borderline/diagnóstico , Estudos de Coortes , Feminino , Esperança , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Motivação , Inventário de Personalidade/estatística & dados numéricos , Estudos Prospectivos , Psicometria , Recidiva , Regressão Psicológica , Medição de Risco , Tentativa de Suicídio/prevenção & controle
5.
J Fr Ophtalmol ; 44(9): 1425-1438, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34538661

RESUMO

Corneal haze represents subepithelial corneal fibrosis, a manifestation of a pathological healing process. It occurs as a result of an epithelial-stromal lesion involving a break in the epithelial barrier. It is an inflammatory response that involves the migration, multiplication and differentiation of keratocytes into mature myofibroblasts, causing loss of corneal transparency. Although it is a transient phenomenon, this complication is feared following refractive photokeratectomy (PRK), because it can cause alterations in the quality of vision, refractive regression and decreased visual acuity. The severity of these symptoms is correlated with the severity of the corneal haze, which can be assessed clinically or by objective means such as corneal densitometry measurement. The frequency and severity of corneal haze increase with the depth of photoablation in PRK and are therefore increased during the treatment of severe ametropia. Considering that no consensus exists, the application of mitomycin C (MMC) intraoperatively and topical corticosteroids postoperatively are conventionally used to inhibit collagen synthesis, sometimes in combination with various protocols depending on the center or surgeon. This review of the literature reports the current knowledge on corneal haze, in order to better understand it and optimise its prevention in the context of a decreased MMC supply, which has occurred in the past and could recur in the future.


Assuntos
Opacidade da Córnea , Ceratectomia Fotorrefrativa , Córnea , Opacidade da Córnea/diagnóstico , Opacidade da Córnea/etiologia , Humanos , Lasers de Excimer/efeitos adversos , Mitomicina
6.
Rev Med Interne ; 41(11): 732-740, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33077266

RESUMO

BACKGROUND: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has spread worldwide from epicenter of Wuhan, China since December 2019. The aim of our study was to describe the clinical characteristics and outcome of hospitalized patients with SARS-CoV-2 pneumonia at the Toulouse university hospital, France. PATIENTS AND METHODS: We selected the patients included from March 7, 2020 to April 20, 2020 in the retrolective Covid-clinic-Toul cohort that follows all hospitalized patients with SARS-CoV-2 infection at the Toulouse Hospital. Cases were confirmed by real-time reverse transcriptase polymerase chain reaction. We report demographics, clinical, biological and radiological features, as well as unfavorable outcome at Day 14 after admission (admission in an intensive care unit, mechanical ventilation, death). RESULTS: Among 263 hospitalized patients, the median age was 65 years and 155 (58.9%) were males. Two hundred and twenty-seven patients (86.3%) had at least one comorbidity. The median time from first symptom to hospital admission was 7.0 days (interquartile range: 4-10). On day 14 after admission, 111 patients (42.2%) had been transferred to intensive care unit (ICU), including 50 (19.0%) on Day 1; 61 (23.1%) needed mechanical ventilation and 19 patients (7.2%) had died. Patients admitted to ICU at Day 1 of admission (n=50) were more frequently men (66.0% vs 57.3%), smokers (25.0% vs 7.1%), with obesity (42.0% vs 24.7%) and had a higher mean level of C-reactive protein (median: 110.9mg/L vs 46.2mg/L). CONCLUSION: This cohort provides epidemiological data on SARS-CoV-2 in hospitalized patients in a University hospital in the South of France.


Assuntos
COVID-19/diagnóstico , COVID-19/terapia , Idoso , Estudos de Coortes , Feminino , França , Hospitalização , Hospitais Universitários , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento
7.
Eur J Emerg Med ; 26(6): 400-404, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31453847

RESUMO

OBJECTIVES: The early identification of patients with Acute Heart Failure Syndrome (AHFS) among patients admitted to the Emergency Department (ED) with dyspnoea can facilitate the introduction of appropriate treatments. The objectives are to identify the predictive factors for AHFS diagnosis in patients with acute dyspnoea (primary objective) and the clinical 'gestalt' (secondary objective) in ED. METHODS: PREDICA is an observational, prospective, multicentre study. The enrolment of patients admitted to the ED for nontraumatic acute dyspnoea and data collection on admission were recorded by the patient's emergency physician. The AHFS endpoints were assessed following a duplicate expert evaluation by pairs of cardiologists and emergency physicians. Step-by-step logistic regression was used to retain predictive criteria, and the area under the receiver operating characteristic (ROC) curve of the model was constructed to assess the ability of the selected factors to identify real cases. The probability of AHFS was estimated on a scale from 1 to 10 based on the emergency physician's perception and understanding (gestalt). RESULTS: Among 341 patients consecutively enrolled in three centres, 149 (44%) presented AHFS. Eight predictive factors of AHFS were detected with a performance test showing an area under the model ROC curve of 0.86. Gestalt greater than or equal to five showed sensitivity of 78% and specificity of 90% (AUC 0.91) and diagnosed 88% of AHF in our population. CONCLUSIONS: We identified several independant predictors of final AHFS diagnosis. They should contribute to the development of diagnostic strategies in ED. However, unstructured gestalts seem to perform very well alone.


Assuntos
Dispneia/etiologia , Serviço Hospitalar de Emergência , Insuficiência Cardíaca/diagnóstico , Doença Aguda , Idoso , Idoso de 80 Anos ou mais , Serviço Hospitalar de Emergência/estatística & dados numéricos , Feminino , Insuficiência Cardíaca/complicações , Humanos , Modelos Logísticos , Masculino , Estudos Prospectivos , Curva ROC , Fatores de Risco
8.
J Phys Condens Matter ; 31(44): 445601, 2019 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-31295728

RESUMO

We have studied the low temperature electrical transport properties of La x Sr1-x CuO2 thin films grown by oxide molecular beam epitaxy on (1 1 0) GdScO3 and TbScO3 substrates. The transmission electron microscopy measurements and the x-ray diffraction analysis confirmed the epitaxy of the obtained films and the study of their normal state transport properties, removing the ambiguity regarding the truly conducting layer, allowed to highlight the presence of a robust hidden Fermi liquid charge transport in the low temperature properties of infinite layer electron doped cuprate superconductors. These results are in agreement with recent observations performed in other p  and n doped cuprate materials and point toward a general description of the superconducting and normal state properties in these compounds.

9.
Sci Rep ; 7(1): 16449, 2017 11 27.
Artigo em Inglês | MEDLINE | ID: mdl-29180657

RESUMO

It is shown that the electron-phonon interaction at a conducting interface between a topological insulator thin film and a semiconductor substrate can be directly probed by means of high-resolution Brillouin light scattering (BLS). The observation of Kohn anomalies in the surface phonon dispersion curves of a 50 nm thick Bi2Te3 film on GaAs, besides demonstrating important electron-phonon coupling effects in the GHz frequency domain, shows that information on deep interface electrons can be obtained by tuning the penetration depth of optically-generated surface phonons so as to selectively probe the interface region, as in a sort of quantum sonar.

10.
Arch Mal Coeur Vaiss ; 99(9): 823-7, 2006 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-17067102

RESUMO

The effectiveness of thrombolytics has been clearly demonstrated in more than half the cases in the large cohorts of patients selected for trials during the acute phase of myocardial infarction. At individual level, thrombolysis will clinically either succeed or fail so, for the medical team managing the patient, choice of treatment may be likened to a gamble which in the best of cases (most often) leads to an uncomplicated success and, in the worst of cases, failure worsened by a severe complication. OPTIMAL is a multidisciplinary and multicentre, prospective cohort study associating mobile medical teams and interventional cardiology units to test the hypothesis that the outcome of prehospital thrombolysis does not depend on chance alone but also varies according to demographic, etiological, clinical and logistic factors involved in the occurrence and management of myocardial infarction. The primary objective of this French study, conducted over one year on more than 800 subjects, is to identify the predictors of the results of prehospital thrombolysis from a very early angiographic evaluation. The results for this cohort may be useful for setting up appropriate management strategies for acute myocardial infarction, from the prehospital phase (thrombolysis or not) up to in-hospital orientation of the patients (angiography room or Intensive Care Unit) and to determine the most judicious time for coronary angiography. OPTIMAL is to date the largest prospective serie of prehospital thrombolysis evaluated by an early angiographic control.


Assuntos
Serviços Médicos de Emergência/organização & administração , Infarto do Miocárdio/tratamento farmacológico , Projetos de Pesquisa , Terapia Trombolítica , Angiografia Coronária , Coleta de Dados/métodos , Eletrocardiografia , França , Humanos , Infarto do Miocárdio/diagnóstico por imagem , Seleção de Pacientes , Estudos Prospectivos , Sistema de Registros
11.
Arch Mal Coeur Vaiss ; 98(11): 1123-9, 2005 Nov.
Artigo em Francês | MEDLINE | ID: mdl-16379109

RESUMO

The problem of pre-hospital management of acute coronary syndromes without ST elevation has not been extensively studied. The practitioner is faced with three simultaneous problems: suspecting the diagnosis, how to confirm the diagnosis to introduce appropriate, rapid and effective treatment, and which prognostic criteria to use to install aggressive therapy in high risk groups (anti GP lIb/IIIa, clopidogrel, angioplasty). TOSCANE is the first multicentre French registry which analyses the impact of the emergency ambulance serve in the management of these patients. There are two objectives: to gather epidemiological data about pre-hospital and hospital management by the emergency physician and the cardiologist, and to identify at an early stage criteria of "high risk" (HR) which, according to the recommendations of the European Society of Cardiology, justify using the most aggressive therapies. From April to September 2003, 797 patients with suspected acute coronary syndromes were enrolled by 36 French centre. Of these patients, 780 were managed successfully by the emergency ambulance service and hospital cardiological department with or without a "Cath Lab", and included for analysis. The diagnosis of acute coronary syndrome without ST elevation was rarely certain in the pre-hospital period. The lack of formal paraclinical features confirming the diagnosis was often a handicap for the emergency physician. Although the European recommendations are well observed in the cardiology departments, their application and adaptability should be improved in the pre-hospital period. TOSCANE showed that all invasive strategies preceded by platelet anti-aggregant therapy in the prehospital period administered to high risk patients, significantly reduced the mortality and morbidity at one month.


Assuntos
Angina Instável/terapia , Serviços Médicos de Emergência , Infarto do Miocárdio/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Angina Instável/diagnóstico , Eletrocardiografia , Feminino , França , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/diagnóstico , Estudos Prospectivos , Sistema de Registros , Medição de Risco , Fatores de Risco
12.
Arch Mal Coeur Vaiss ; 98(11): 1143-8, 2005 Nov.
Artigo em Francês | MEDLINE | ID: mdl-16379112

RESUMO

UNLABELLED: The aim of the ESTIM Midi-Pyrénées survey was to monitor the management of acute coronary syndrome with ST segment elevation by cardiologists and emergency departments in the Midi-Pyrénées region. Over a period of 2 years between June 2001 and June 2003, 1287 patients presenting with acute coronary syndrome within the first 24 hours were recruited prospectively. The initial management of these patients was undertaken either by a mobile medical team in the pre-hospital phase, or in a hospital emergency department, non-interventional cardiology department or an interventional cardiology department in 51.8%, 28.8%, 9.6% et 9.9% of cases respectively. Depending on these four modes of initial management, the median time for initial management was 1h30, 2h45, 4h30 et 4h respectively. Emergency coronary reperfusion was proposed in 89.6% of cases. Of the patients in whom reperfusion was attempted within the first 12 hours, 33.7% underwent pre-hospital thrombolysis (median delay of 1h48), 35.8% underwent thrombolysis in hospital (median delay 3h), and 30.4% underwent primary angioplasty (median delay 4h40). Thrombolysis was followed by angioplasty in 80% of cases. A combined approach with thrombolysis and angioplasty was applied in 41% of patients. At one month the rate of major cardiac events, death, and/or subsequent myocardial infarction was 12%. Multivariate analysis revealed that the only significant adverse prognostic features were: not offering reperfusion [Odds ratio (OR) 4, confidence interval (CI) 2.3-3.7] and age [OR 3.8, CI 2.3-6.2]. The method of reperfusion did not influence the subsequent outcome in this regional survey. CONCLUSION: pre-hospital management allows early revascularisation. In our region there was no significant prognostic difference between pre-hospital thrombolysis and primary angioplasty. It shows that the logistic and therapeutic potentials of prehospital care are not being sufficiently exploited.


Assuntos
Infarto do Miocárdio/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Angina Instável/terapia , Angioplastia Coronária com Balão/estatística & dados numéricos , Serviços Médicos de Emergência , Serviço Hospitalar de Emergência , Feminino , França , Pesquisas sobre Atenção à Saúde , Unidades Hospitalares , Humanos , Masculino , Pessoa de Meia-Idade , Reperfusão Miocárdica/estatística & dados numéricos , Estudos Prospectivos , Sistema de Registros , Terapia Trombolítica/estatística & dados numéricos , Fatores de Tempo
13.
Nanoscale ; 7(38): 15935-44, 2015 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-26365282

RESUMO

We present a simple two-stage vapour-solid synthesis method for the growth of bismuth chalcogenide (Bi2Te3, Bi2Se3) topological insulator nanowires/nanobelts by using Bi2Se3 or Bi2Te3 powders as source materials. During the first stage of the synthesis process nanoplateteles, serving as "catalysts" for further nanowire/nanobelt growth, are formed. At a second stage of the synthesis, the introduction of a N2 flow at 35 Torr pressure in the chamber induces the formation of free standing nanowires/nanobelts. The synthesised nanostructures demonstrate a layered single-crystalline structure and Bi : Se and Bi : Te ratios 40 : 60 at% for both Bi2Se3 and Bi2Te3 nanowires/nanobelts. The presence of Shubnikov de Haas oscillations in the longitudinal magneto-resistance of the nanowires/nanobelts and their specific angular dependence confirms the existence of 2D topological surface states in the synthesised nanostructures.

14.
Int J Parasitol ; 31(10): 1114-20, 2001 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-11429176

RESUMO

Membrane potential changes in host cell plasma membrane were analyzed and the parasitophorous vacuole membrane (PVM) potential was characterized after infection by Toxoplasma gondii. Human monocytes infested by T. gondii were stained with two membrane potential sensitive dyes, DiOC(6)(3) carbocyanine and DiSBAC(2)(3) bis-oxonol, before fluorescence emission analysis by confocal laser scanning microscopy. After 24 and 48 h of infection, 34 and 39%, respectively, of monocytes showed several parasites (from two to six) per cell. At these infection times, significant decreases in cytoplasmic emissions were observed for both DiOC(6)(3) and DiSBAC(2)(3). Thus, hyperpolarisation of the host plasma membrane would occur consecutively to infection. Inside the parasitophorous vacuole, the fluorescence intensity of DiOC(6)(3) and DiSBAC(2)(3) increased significantly from 6 to 24 h after infection and the PVM became less polarised. Involvement of different ATPases in the membrane potential of infected monocytes was evaluated with ouabain, DCCD, omeprazole and sodium orthovanadate, ATPase inhibitors. All inhibitors induced a depolarisation of the plasma membrane. In the parasitophorous vacuole compartment, DCCD, omeprazole and sodium orthovanadate but not ouabain caused a significant depolarisation of the PVM, suggesting that H(+), H(+)/K(+) and P-type ATPases were at the origin of the PVM potential. This is the first report showing the presence of ion transporters in the T. gondii PVM and the existence of at least two members of the P-type family of ion pumps: an electrogenic H(+)ATPase and an electroneutral H(+)/K(+) ATPase.


Assuntos
Monócitos/fisiologia , Monócitos/parasitologia , Toxoplasma/fisiologia , Adenosina Trifosfatases/antagonistas & inibidores , Adenosina Trifosfatases/fisiologia , Animais , Carbocianinas/farmacologia , Membrana Celular/fisiologia , Dicicloexilcarbodi-Imida/farmacologia , Inibidores Enzimáticos/farmacologia , Gramicidina/farmacologia , Humanos , Potenciais da Membrana/fisiologia , Microscopia Confocal , Microscopia de Fluorescência , Monócitos/imunologia , Omeprazol/farmacologia , Ouabaína/farmacologia , Vanadatos/farmacologia
15.
J Appl Physiol (1985) ; 86(1): 52-60, 1999 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-9887112

RESUMO

The purpose of this study was to compare the oxidation of [13C]glucose (100 g) ingested at rest or during exercise in six trained (TS) and six sedentary (SS) male subjects. The oxidation of plasma glucose was also computed from the volume of 13CO2 and 13C/12C in plasma glucose to compute the oxidation rate of glucose released from the liver and from glycogen stores in periphery (mainly muscle glycogen stores during exercise). At rest, oxidative disposal of both exogenous (8.3 +/- 0.3 vs. 6.6 +/- 0.8 g/h) and liver glucose (4.4 +/- 0.5 vs. 2.6 +/- 0.4 g/h) was higher in TS than in SS. This could contribute to the better glucose tolerance observed at rest in TS. During exercise, for the same absolute workload [140 +/- 5 W: TS = 47 +/- 2.5; SS = 68 +/- 3 %maximal oxygen uptake (VO2 max)], [13C]glucose oxidation was higher in TS than in SS (39.0 +/- 2.6 vs. 33.6 +/- 1.2 g/h), whereas both liver glucose (16.8 +/- 2.4 vs. 24.0 +/- 1.8 g/h) and muscle glycogen oxidation (36.0 +/- 3.0 vs. 51.0 +/- 5.4 g/h) were lower. For the same relative workload (68 +/- 3% VO2 max: TS = 3.13 +/- 0.96; SS = 2.34 +/- 0.60 l O2/min), exogenous glucose (44.4 +/- 1.8 vs. 33.6 +/- 1.2 g/h) and muscle glycogen oxidation (73.8 +/- 7.2 vs. 51.0 +/- 5.4 g/h) were higher in TS. However, despite a higher energy expenditure in TS, liver glucose oxidation was similar in both groups (22.2 +/- 3.0 vs. 24.0 +/- 1.8 g/h). Thus exogenous glucose oxidation was selectively favored in TS during exercise, reducing both liver glucose and muscle glycogen oxidation.


Assuntos
Exercício Físico/fisiologia , Glucose/metabolismo , Aptidão Física/fisiologia , Adulto , Ciclismo/fisiologia , Glicemia/metabolismo , Dióxido de Carbono/metabolismo , Humanos , Insulina/sangue , Fígado/metabolismo , Masculino , Oxirredução , Consumo de Oxigênio/fisiologia , Descanso/fisiologia
16.
Eur J Pharmacol ; 266(2): 175-80, 1994 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-8157070

RESUMO

Dermenkephalin (Tyr-D-Met-Phe-His-Leu-Met-AspNH2) is a highly potent and selective delta-opioid peptide isolated from frog skin. It was recently recognized that the C-terminus His4-Leu5-Met6-Asp7NH2 of dermenkephalin was responsible for the addressing of the peptide towards the delta-opioid receptor. In order to investigate the role played by residues 4, 5 and 6 in this 'delta address', we synthesized and evaluated 20 new analogues for their ability to displace tritiated ligands from mu- and delta-opioid sites. Results showed that position 4 of dermenkephalin contributes to delta selectivity independently of delta-opioid receptor binding by preventing a high affinity mu binding. Position 5 requires a hydrophobic side chain to enhance delta affinity. A high delta affinity was obtained with any amino acids introduced in position 6 suggesting that residue 6 serves as a neutral spacer. Thus, the main features responsible for the high delta-opioid selectivity of dermenkephalin are electrostatic repulsions with the mu-opioid receptor, additional hydrophobic interactions with the delta-opioid receptor and folding of the C-terminal domain.


Assuntos
Oligopeptídeos/metabolismo , Receptores Opioides delta/metabolismo , Sequência de Aminoácidos , Animais , Cerebelo/metabolismo , Técnicas In Vitro , Dados de Sequência Molecular , Oligopeptídeos/química , Ratos , Ratos Sprague-Dawley , Relação Estrutura-Atividade
17.
Eur J Pharmacol ; 179(1-2): 57-64, 1990 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-2142087

RESUMO

Rat atrial natriuretic factor (125I-rANF, 99-128) is hydrolysed by pure enkephalinase (EC 3.4.24.11) in vitro at a rate similar to that of 125I-hANF. Trichloroacetic precipitated radioactivity was significantly elevated in the kidneys of rats pretreated with acetorphan, an enkephalinase inhibitor, and receiving 125I-rANF, indicating that the exogenous hormone was protected against degradation. A single oral administration of acetorphan elicited diuretic and natriuretic effects in conscious normotensive rats and natriuretic effects in spontaneously hypertensive rats, effects which were not accompanied by significant changes in kaliuresis. The diuretic and natriuretic effects were still observed in conscious normotensive rats after three days of repeated administration of the drug. In conscious or anesthetized rats in which volume expansion was elicited by hydroelectrolytic loads, the initial rate of urinary elimination of water and sodium was nearly doubled by treatment with enkephalinase inhibitors. This effect was prevented by coadministration of an ANF antiserum, which suggests that the effect was mediated by endogenous ANF. These various observations suggest that enkephalinase inhibitors protect endogenous ANF from degradation and thereby enhance the typical renal effects of the hormone.


Assuntos
Fator Natriurético Atrial/metabolismo , Diurese/efeitos dos fármacos , Natriurese/efeitos dos fármacos , Neprilisina/antagonistas & inibidores , Potássio/urina , Tiorfano/farmacologia , Animais , Fator Natriurético Atrial/administração & dosagem , Fator Natriurético Atrial/sangue , Cromatografia Líquida de Alta Pressão , Injeções Intravenosas , Masculino , Neprilisina/sangue , Pró-Fármacos , Ratos , Ratos Endogâmicos SHR , Ratos Endogâmicos , Tiorfano/administração & dosagem , Tiorfano/análogos & derivados , Fatores de Tempo
18.
Eur J Clin Nutr ; 57(9): 1107-15, 2003 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12947429

RESUMO

BACKGROUND: Net whole-body and hepatic de novo lipogenesis could be more active in women than in men, but no comparison has been made between men and women in the two phases of the ovarian cycle after ingestion of a large carbohydrate meal. OBJECTIVE: We hypothesized that net whole-body de novo lipogenesis could be larger in women than men, and that glycogen and fat balance could be, respectively, lower and higher, following a large pasta meal ingested after rest or exercise. DESIGN: The metabolic response to a pasta meal (5 g dry weight/kg body mass) was studied in six men and six women (matched for age and BMI) in the follicular and luteal phases, following rest or exercise (90 min at 50% VO(2max)). Protein, glucose, and fat oxidation, and net whole-body de novo lipogenesis were computed for 10 h following ingestion of the meal using indirect respiratory calorimetry corrected for urea excretion. RESULTS: No net whole-body de novo lipogenesis was observed in any group in any situation (postrest and postexercise). When the meal was ingested following exercise, fat oxidation was significantly higher and glucose oxidation was significantly lower (P<0.05) than following the period of rest, and in a given experimental situation, the respective contributions of protein, fat, and glucose oxidation to the energy yield were similar in men and women in both phases of the cycle. CONCLUSIONS: The contribution of substrate oxidation to the energy expenditure as well as fat and glycogen balance, and the effect of a previous exercise period, were similar in men and women in both phases of the cycle following ingestion of the large carbohydrate meal.


Assuntos
Carboidratos da Dieta/metabolismo , Exercício Físico/fisiologia , Descanso/fisiologia , Amido/metabolismo , Adulto , Glicemia/metabolismo , Metabolismo Energético/fisiologia , Feminino , Glicogênio/metabolismo , Humanos , Insulina/sangue , Metabolismo dos Lipídeos , Masculino , Ciclo Menstrual/metabolismo , Proteínas/metabolismo , Valores de Referência , Respiração , Fatores Sexuais , Fatores de Tempo
19.
Methods Find Exp Clin Pharmacol ; 13(2): 99-104, 1991 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-1830125

RESUMO

A video-tracking technique has been used for the evaluation of climbing behavior in mice. An automated image analysis system, the Videotrack 512 (Electronique Lyonnaise), was adapted for this specific application. This allowed distinguishing between spontaneous climbing and stereotyped climbing. The activity duration of mice was simultaneously measured. In order to validate this method, in the present study the ability of apomorphine to induce climbing in mice, and the effects of the D1-dopamine receptor agonist SKF-38393 and the D2-dopamine agonist RU-24926 and their association were investigated.


Assuntos
2,3,4,5-Tetra-Hidro-7,8-Di-Hidroxi-1-Fenil-1H-3-Benzazepina/farmacologia , Comportamento Animal/efeitos dos fármacos , Fenetilaminas/farmacologia , Psicologia Experimental/instrumentação , Receptores Dopaminérgicos/efeitos dos fármacos , Comportamento Estereotipado/efeitos dos fármacos , Animais , Apomorfina/farmacologia , Masculino , Camundongos , Atividade Motora/efeitos dos fármacos , Receptores de Dopamina D1 , Receptores de Dopamina D2 , Gravação de Videoteipe
20.
Arch Mal Coeur Vaiss ; 95 Spec No 7: 43-8, 2002 Nov.
Artigo em Francês | MEDLINE | ID: mdl-12500604

RESUMO

Effectiveness, safety, moderation, complementary, network, consensus, strategy and evaluation are the key words in the therapeutic management of acute myocardial infarction. They focus the development of pharmacological and interventional tools of recanalisation, and the decisions for those who use them. In order to cover a condition for which the patient and doctor alike choose neither time nor place, they lead to linking methods and disciplines together for a united approach. They take account of practice in order to adapt scientific data to the realities of exercise, to justify the given means, and to propose clear, realistic and useful management guidelines to first contact doctors. They deliver the best to the greatest number of patients.


Assuntos
Infarto do Miocárdio/cirurgia , Revascularização Miocárdica/métodos , Guias de Prática Clínica como Assunto , Exercício Físico , Humanos , Infarto do Miocárdio/patologia , Equipe de Assistência ao Paciente , Seleção de Pacientes
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