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1.
Ann Cardiol Angeiol (Paris) ; 70(5): 270-274, 2021 Nov.
Artículo en Francés | MEDLINE | ID: mdl-34517977

RESUMEN

BACKGROUND: Guidelines recommend to consider excluding non-ST-segment elevation myocardial infarction (NSTEMI) when high-sensitivity cardiac troponin is below the limit of quantification and a single blood sample is taken > 6 h after the onset of chest pain. The aim of our study was to assess such exclusion when a single blood sample was taken 3-6 h after the onset of permanent chest pain. METHODS: This observational study included consecutive patients admitted into the emergency room of our hospital with chest pain and suspected NSTEMI, with non-contributive electrocardiograms and a single high-sensitivity cardiac troponin I (hs-cTnI) blood sample taken 3-6 h after the onset of chest pain and hs-cTnI < 4 ng/l (Abbott Diagnostic). Clinical follow-up was undertaken 1 month after admission. RESULTS: The mean age of the 432 patients was 48.5 ± 5.6 years and 51% were male. Based on a clinical algorithm, the pre-test probability of NSTEMI was low in 70%, and intermediate in 21% of patients. Among 419 patients with available 1-month follow-up data, there were no myocardial infarctions or deaths. Thirty-eight patients (9%) were admitted into hospital but none for cardiac reasons. CONCLUSIONS: Our results suggest that exclusion of NSTEMI in patients with a non-contributive electrocardiogram and a single "negative" troponin test in a blood sample taken 3-6 h after the onset of symptoms is valid.


Asunto(s)
Síndrome Coronario Agudo , Troponina I , Síndrome Coronario Agudo/diagnóstico , Adulto , Biomarcadores , Dolor en el Pecho/diagnóstico , Dolor en el Pecho/etiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Troponina T
2.
Diagn Interv Imaging ; 102(4): 241-245, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33008783

RESUMEN

PURPOSE: The purpose of this study was to analyze the potential of ultrasound with a high frequency probe (24-MHz) in the assessment of the long thoracic nerve (LTN) and describe ultrasonographic landmarks that can be used for standardization. MATERIAL AND METHODS: Ultrasonography analysis of the LTN was done on 2 LTNs in a cadaver specimen and then on 30 LTNs in 15 healthy volunteers (12 men, 3 women; mean age, 28.8±3.8 [SD] years; age range: 24-39 years) by two independent radiologists (R1 and R2) using a 24-MHz probe. Interrater agreement was assessed using Kappa test (K) and intraclass correlation coefficient (ICC). RESULTS: In the cadaver, dissection confirmed that the India ink was injected near the LTN in the middle scalene muscle. In volunteers, visibility of the LTN above the clavicle was highly reproducible for the branches arising from C5 (R1: 87% [26/30]; R2: 90% [27/30]; K=0.83) and from C6 (R1: 100% [30/30]; R2: 97% [29/30]; K=0.94). Where the nerve emerged from the middle scalene muscle, the mean diameter was 0.85±0.24 (SD) mm (range: 0.4-1.6mm) for R1 and 0.9±0.23 (SD) mm (range: 0.4-1.7mm) for R2 (ICC: 0.96; 95% CI: 0.92-0.98%). Along the thoracic wall, where LTN run along the lateral thoracic artery, the mean diameter was 0.83±0.19 (SD) mm (range: 0.5-1.27mm) for R1 and 0.89±0.21 (SD) mm (range: 0.6-1.2mm) for R2 (ICC: 0.86; 95% CI: 0.72-0.93%). CONCLUSION: The LTN can be analyzed with ultrasound using high-frequency probe by using the C5 and C6 roots, the middle scalene muscle above the clavicle and the lateral thoracic artery on the chest wall as landmarks.


Asunto(s)
Nervios Torácicos , Adulto , Cadáver , Femenino , Humanos , Masculino , Nervios Torácicos/anatomía & histología , Nervios Torácicos/diagnóstico por imagen , Ultrasonografía , Adulto Joven
3.
Ann Cardiol Angeiol (Paris) ; 68(5): 293-299, 2019 Nov.
Artículo en Francés | MEDLINE | ID: mdl-31542198

RESUMEN

PURPOSE: The percutaneous coronary interventions use large doses of ionizing radiation, particularly when treating complex lesions. The incidence of radio-induced skin lesions is poorly known. Our goal was to evaluate the frequency of occurrence of such lesions, as well as the factors that may contribute to a high radiation dose. The recommended DAP (dose-area product) cutoff for skin monitoring after percutaneous coronary interventions is 500Gy cm2. PATIENTS AND METHOD: We prospectively studied the incidence of acute (after 5-7 days) and subacute (after 7 days to 6 months) skin lesions following angioplasty with a dose-area product (DAP) ≥200Gy cm2 in patients who underwent coronary angioplasty in our center in 2013. RESULTS: Nine hundred and thirty three consecutive procedures were analyzed, of which 102 with a DAP ≥200Gy cm2. Three patients presented an acute lesion. Two of these three patients also had subacute lesions. Another patient presented only a subacute lesion. 4.82% (95% CI: [0-10]) of the patients with a DAP ≥200Gy cm2 developed radiodermitis lesions, or 0.47% (95% CI: [0-0.9]) of all the patients who underwent angioplasty. The Body Mass Index and the elective (as opposed to energy) procedures were independently associated with a procedure with a DAP ≥200Gy cm2. CONCLUSION: Radiodermatitis lesions occur for 4.82% of patients benefiting from procedures with a DAP ≥200Gy cm2. We suggest the establishment of a DAP threshold for dermal monitoring of patients of 200Gy cm2 per procedure instead of 500Gy cm2.


Asunto(s)
Intervención Coronaria Percutánea , Radiodermatitis/epidemiología , Radiodermatitis/etiología , Radiografía Intervencional/efectos adversos , Anciano , Angioplastia Coronaria con Balón/efectos adversos , Femenino , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Intervención Coronaria Percutánea/métodos , Estudios Prospectivos
4.
Ann Cardiol Angeiol (Paris) ; 68(5): 285-292, 2019 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-31570158

RESUMEN

BACKGROUND: Although mortality due to acute heart failure has decreased, its prevalence in France is still high. The aim of this study was to examine the quality of acute heart failure treatment in French emergency departments (EDs) with reference to subsequently published European Society of Cardiology (ESC) recommendations. METHODS: The medical records of patients with acute pulmonary oedema (as a marker for acute heart failure) admitted to the EDs of 11 French hospitals in 2013 were reviewed retrospectively. RESULTS: A total of 834 patients were included (median [interquartile range] age 84 [78-89] years; 48.6% male). Rates of compliance of initial management in 2013 to subsequently published 2015 recommendations were as follows: (1) thoracic ultrasound was performed in 17.3%; (2) loop diuretics were given in 75.9%; at a correct dose (among those for whom this was calculable) in 40.0% (3); intravenous nitrates were given in 21.7% of patients with systolic blood pressure>110mmHg; (4) non-invasive ventilation was initiated in 22.0% of patients with respiratory distress. Discharge summaries most often lacked a scheduled cardiologist follow-up (89.4%) and discharge patient weight (78.9%). CONCLUSIONS: The early management of patients with acute pulmonary oedema (as a marker of acute heart failure) in France in 2013 was quite different to recommendations published in 2015. A programme to implement the new recommendations is in place, and a repeat evaluation will be conducted in 2017.


Asunto(s)
Insuficiencia Cardíaca/terapia , Calidad de la Atención de Salud , Enfermedad Aguda , Anciano , Anciano de 80 o más Años , Servicio de Urgencia en Hospital , Femenino , Francia , Adhesión a Directriz/estadística & datos numéricos , Insuficiencia Cardíaca/complicaciones , Humanos , Masculino , Guías de Práctica Clínica como Asunto , Edema Pulmonar/etiología , Edema Pulmonar/terapia , Estudios Retrospectivos
5.
Ultramicroscopy ; 108(6): 523-8, 2008 May.
Artículo en Inglés | MEDLINE | ID: mdl-17913361

RESUMEN

In this work, we present a new development of the laser optical feedback imaging technique for imaging biological structures with a high resolution. The first results obtained on human red blood cells and mice cerebral and muscular tissues slices are shown. The performances of the system and its future developments are also discussed.


Asunto(s)
Células/ultraestructura , Técnicas Citológicas/métodos , Microscopía Confocal/métodos , Animales , Encéfalo/citología , Técnicas Citológicas/instrumentación , Células Endoteliales/citología , Eritrocitos/ultraestructura , Retroalimentación , Humanos , Ratones , Microscopía Confocal/instrumentación , Fibras Musculares Esqueléticas/ultraestructura , Óptica y Fotónica , Dispersión de Radiación
6.
Sante Publique ; 18(4): 523-32, 2006 Dec.
Artículo en Francés | MEDLINE | ID: mdl-17294756

RESUMEN

SUMMARY: A survey conducted between May and September 2005 in the Paris Region collected 67 cases of accidental "falls from heights" among the children under the age of 15. Most of the injured children were under the age of 6 (72%), the majority were boys (72%). More than half of the children's families were from extra-European origin, mostly from Sub-Saharan Africa. In 32% of the cases, the fall occurred as the opening had a protection. A piece of furniture was in place beneath the window or was disposed by the child in 55% of the cases; 33% of the children climbed the parapet or the opening. In third of the falls, there was an adult present with the child in the room. Seven children died (10%) and eight (12%) had sequelae. The risk of fall due to the lack of surveillance is not enough known by adults. It is therefore recommended to organise prevention campaigns. To prevent falls, one should revise the regulations for building the parapet and the mechanisms for opening the windows.


Asunto(s)
Accidentes por Caídas/estadística & datos numéricos , Cuidadores , Traumatismos Craneocerebrales/epidemiología , Traumatismo Múltiple/epidemiología , Accidentes por Caídas/mortalidad , Accidentes por Caídas/prevención & control , Adolescente , Adulto , Niño , Cuidado del Niño , Preescolar , Traumatismos Craneocerebrales/mortalidad , Traumatismos Craneocerebrales/prevención & control , Planificación Ambiental , Femenino , Escala de Consecuencias de Glasgow , Encuestas Epidemiológicas , Humanos , Incidencia , Lactante , Puntaje de Gravedad del Traumatismo , Masculino , Traumatismo Múltiple/mortalidad , Traumatismo Múltiple/prevención & control , Paris/epidemiología , Factores de Riesgo , Encuestas y Cuestionarios , Salud Urbana
7.
Ann Cardiol Angeiol (Paris) ; 65(5): 379, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27968771

RESUMEN

BACKGROUND: In 2015, the European Society of cardiology published guidelines on the pre-hospital and early hospital management of acute cardiac failure (ACF), which included: - use of intravenous vasodilators (nitrates) when systolic blood pressure is>110mmHg; - non-invasive ventilation if oxygen saturation is<90% and/or respiratory rate is>25/min despite nasal oxygen; - using a reduced dose of intravenous furosemide (20-40mg or equivalent of the oral morning dose if already on chronic diuretic therapy) and; - early performance of echocardiography. We sought to compare the gap between these recommendations and clinical practices in French emergency departments (EDs). METHODS: We undertook a retrospective evaluation of clinical practices in 834 consecutive patients with ACF admitted in 2013 to the EDs of 16 French hospitals. Data, including patient characteristics and practices were collected from the medical records. RESULTS: Patients' mean±standard deviation age was 82±10 years and 49% were men. Clinical practices in relation to the guideline recommendations are shown in the Table 1. CONCLUSIONS: These initial data which precede publication of the current guidelines, show that use of nitrates, non-invasive ventilation, reduced diuretic dose and early echocardiography were relatively infrequent at the first point of medical care for patients presenting with ACF. These findings indicate the need for a sizable shift in practice in order to meet the new guideline recommendations. We will conduct a repeat evaluation in 2016, after implementation of a programme aimed to improve practices at these sites.

8.
Encephale ; 31(1 Pt 1): 98-101, 2005.
Artículo en Francés | MEDLINE | ID: mdl-15971646

RESUMEN

Several cases of Parkinsonian syndrome, cognitive impairment or hyperammonemia induced by sodium valproate have been described in the literature. We report the first case presenting an association of the three adverse effects occurring with divalproate sodium prescribed for bipolar disorder: a 58-year-old man with a history of bipolar type I disorder presented with Parkinsonian syndrome and cognitive impairment of insidious onset. This patient had been treated for several years with lithium carbonate, with a successful effect on mood swings, but with distressing adverse effects such as hand tremor and diarrhoea. Lithium therapy was progressively withdrawn while sodium divalproate was initiated. Associated medications, unchanged for several years, were amisulpride (daily dose: 100 mg), liothyronine, ciprofibrate and benfluorex. The patient was treated with sodium divalproate for seven months (daily dose: 1,000 mg), and with trihexyphenidyle for one month for extrapyramidal symptoms. At hospital admission, he presented with temporal disorientation, slowed thinking, severe anterograde memory deficits, and Parkinsonian syndrome. The minimal mental state (MMS) score was 16 (maximum: 30). The patient was anxious but did no present with mood symptoms. He also developed hyperammonemia (124 micromol/liter, normal range: 15 to 60 micromol/liter) without signs or biochemical evidence of hepatic failure. Valproate concentrations were within the therapeutic ranges (79 mg/l, normal range: 50 to 100 mg/l). The CT-scan showed cerebral and cerebellar atrophy with enlarged ventricles. The electroencephalogram showed generalized slowing waves. All the symptoms resolved within one month after the withdrawal of divalproate: the extrapyramidal hypertonia resolved, the MMS score was 29. The CT-scan and the electroencephalogram returned to normal. The divalproate was replaced by lithium. After a one-year follow-up, the cognitive and neurological symptomatology did not reappear at the exception of the pre-existing hand tremor. The pathophysiology of valproate induced hyperammonemic encephalopathy remains unclear. A possible mechanism is neuronal toxicity induced by increased intracellular concentrations of glutamate and ammonium in astrocytes. Indeed, these abnormal intracellular concentrations increase the intracellular osmolarity and thus induce rise in intracranial pressure and cerebral oedema. Reversible dementia could be due to a direct toxic effect of valproate on the central nervous system or to an indirect effect mediated through valproate-induced hyperammonemia. It has been suggested that the occurrence of extrapyramidal syndrome could be explained by a disturbance in the GABAergic pathways inducing reversible dopamine inhibition. A drug adverse reaction should always be considered when a patient treated with valproate presents with extrapyramidal symptoms and cognitive disorders even when valproate concentrations are within standard therapeutic ranges.


Asunto(s)
Antipsicóticos/efectos adversos , Trastorno Bipolar/tratamiento farmacológico , Trastornos del Conocimiento/inducido químicamente , Hiperamonemia/inducido químicamente , Enfermedad de Parkinson Secundaria/inducido químicamente , Ácido Valproico/efectos adversos , Antipsicóticos/uso terapéutico , Femenino , Humanos , Persona de Mediana Edad , Ácido Valproico/uso terapéutico
9.
Arch Pediatr ; 22(6): 605-7, 2015 Jun.
Artículo en Francés | MEDLINE | ID: mdl-26014646

RESUMEN

In humans, Salmonella most often causes self-limiting gastroenteritis, but more severe symptoms such as sepsis and meningitis can also occur and can sometimes have a fatal outcome. Even if the meningitis is not fatal, sequelae such as epilepsy, cranial nerve palsies, and hydrocephalus can occur. In the United States, it has been estimated that approximately 6% of the human cases of salmonellosis can be attributed to contact with reptiles or amphibians. The infection may take place by direct contact between reptile and human or indirectly via contact with an environment contaminated with Salmonella from a reptile. Salmonella enterica subsp. enterica serotype Vitkin is a common gut inhabitant of reptiles. Though human cases due to this organism are exceedingly rare, it may infect young infants and immunocompromised individuals with a history of intimate associations with reptiles. Gastroenteritis is the most common presentation ; others include peritonitis, meningitis and bacteremia. We report a case of meningitis caused by S. enterica subsp. enterica serotype Vitkin in a 1-month-old child due to a pet turtle.


Asunto(s)
Meningitis Bacterianas/microbiología , Infecciones por Salmonella/etiología , Salmonella enterica , Animales , Humanos , Lactante , Masculino , Mascotas/microbiología , Salmonella enterica/aislamiento & purificación , Tortugas/microbiología
10.
Virus Res ; 39(2-3): 261-76, 1995 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-8837889

RESUMEN

The coronavirus spike glycoprotein (S) mediates both the attachment of virus to the host cell receptor and membrane fusion. We describe here the characterization of a temperature-sensitive mutant of the coronavirus mouse hepatitis virus A59 (MHV-A59) having multiple S protein-related defects. The most remarkable of these was that the mutant, designated Albany 18 (Alb18), assembled virions devoid of the S glycoprotein at the nonpermissive temperature. Alb18 also failed to bring about syncytia formation in cells infected at the nonpermissive temperature. Virions of the mutant assembled at the permissive temperature were much more thermolabile than wild type. Moreover, mutant S protein that was incorporated into virions at the permissive temperature showed enhanced pH-dependent thermolability in its ability to bind to the MHV receptor. Alb18 was found to have a single point mutation in S resulting in a change of serine 287 to isoleucine, and it was shown by revertant analysis that this was the lesion responsible for the phenotype of the mutant.


Asunto(s)
Glicoproteínas de Membrana/metabolismo , Virus de la Hepatitis Murina/metabolismo , Proteínas del Envoltorio Viral/metabolismo , Secuencia de Aminoácidos , Animales , Línea Celular , Genes Virales , Ratones , Ratones Endogámicos BALB C , Datos de Secuencia Molecular , Virus de la Hepatitis Murina/genética , Virus de la Hepatitis Murina/fisiología , Mutación , Fenotipo , Receptores Virales/metabolismo , Análisis de Secuencia , Glicoproteína de la Espiga del Coronavirus , Temperatura , Ensamble de Virus
11.
Brain Res Mol Brain Res ; 74(1-2): 69-82, 1999 Dec 10.
Artículo en Inglés | MEDLINE | ID: mdl-10640677

RESUMEN

Type 1B astrocytes of the human optic nerve head (ONH) constitutively express neural cell adhesion molecule (NCAM) in vivo and in vitro. Increased synthesis of NCAM has been detected in reactive astrocytes in the glaucomatous ONH of human donor eyes. Several NCAM isoforms are generated through alternate RNA splicing in tissue- and disease-specific patterns. In this study, we analyzed expression of NCAM isoforms in ONH of normal donors at different ages and in glaucoma. Total RNA was extracted from ONH of fetal, normal adult and glaucomatous eyes, and cultured human ONH astrocytes, fetal brain astrocytes and an astrocytoma cell line, for reverse transcriptase-polymerase chain reaction (RT-PCR) analysis. To distinguish between NCAM 180 and 140 isoforms, exon-specific primer sets covering exons 13-19 were used. Isoform-specific riboprobes were used for in situ hybridization (ISH) in glaucomatous and in age-matched ONH. By RT-PCR, NCAM 140 was the predominant isoform in adult ONH as well as in all cultured cells. NCAM 180 mRNA was strongly expressed in glaucoma, whereas in normal adult tissues it was not detectable. ISH confirmed expression of NCAM in normal adult ONH and localized NCAM 140 mRNA to astrocytes. ISH demonstrated expression of NCAM 180 mRNA in reactive astrocytes in glaucomatous ONH. Our results demonstrate that the NCAM 180 isoform is induced in glaucoma. NCAM 180 may play a role in astrocyte interaction with extracellular matrix (ECM), vessels, axons and other astrocytes and, through its expanded cytoplasmic domain, serve as a signaling molecule for reactive astrocytes during remodeling of the ONH in glaucoma.


Asunto(s)
Glaucoma/genética , Moléculas de Adhesión de Célula Nerviosa/genética , Disco Óptico/metabolismo , Adolescente , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Empalme Alternativo , Secuencia de Bases , Células Cultivadas , Niño , Preescolar , Ojo/embriología , Ojo/metabolismo , Ojo/patología , Regulación del Desarrollo de la Expresión Génica , Humanos , Hibridación in Situ , Lactante , Recién Nacido , Persona de Mediana Edad , Mutación , Disco Óptico/citología , Disco Óptico/patología , Isoformas de Proteínas/genética , ARN/genética , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa
12.
Brain Res Mol Brain Res ; 81(1-2): 62-79, 2000 Sep 30.
Artículo en Inglés | MEDLINE | ID: mdl-11000479

RESUMEN

Glaucomatous optic neuropathy is usually associated with elevated intraocular pressure. Optic nerve head astrocytes may respond to intraocular pressure by stimulation of pressure-sensitive mechanoreceptors on the cell surface. Neural cell adhesion molecule (NCAM) a transmembrane protein, mediates cell adhesion and migration. The NCAM 180 isoform increases in astrocytes of glaucomatous optic nerve head. We characterized the relative expression of NCAM isoforms in human optic nerve head astrocytes grown under elevated hydrostatic pressure. Astrocytes cultured from normal human optic nerve heads were exposed to either atmospheric or continuous hydrostatic pressure of 60 mm Hg, and analyzed at 6-48 h. Changes in cell shape, immunoreactivity, and distribution of GFAP, actin and NCAM were observed in pressure-treated cultures. Newly synthesized (35)S-labeled NCAM protein immunoprecipitated from cell lysates was increased 2-fold within 24 h after exposure to elevated pressure compared to control. The increase in NCAM synthesis was primarily due to the NCAM 180 isoform. A significant increase in NCAM 180 mRNA levels was detected by RT-PCR and Northern blots in cultured optic nerve head astrocytes within 6 h after exposure to elevated pressure. NCAM 180 mRNA and protein synthesis decreased after 24 h and returned to control levels by 48 h. Our data indicate that NCAM 180 transcription and synthesis in astrocytes is stimulated by elevated hydrostatic pressure. Because NCAM 180 interacts with the cytoskeleton through an extended cytoplasmic tail, a selective and transient increase in NCAM 180 in optic nerve head astrocytes exposed to elevated pressure may be relevant to the migration and interactions of reactive astrocytes in glaucoma.


Asunto(s)
Astrocitos/fisiología , Moléculas de Adhesión de Célula Nerviosa/genética , Nervio Óptico/fisiología , Adolescente , Adulto , Anciano , Astrocitos/citología , División Celular , Tamaño de la Célula , Células Cultivadas , Niño , Exones , Humanos , Presión Hidrostática , Persona de Mediana Edad , Nervio Óptico/citología , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa
13.
Am J Prev Med ; 20(2 Suppl): 16-66, 2001 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11173215

RESUMEN

This report presents the results of systematic reviews of effectiveness, applicability, other effects, economic evaluations, and barriers to use of selected population-based interventions intended to reduce tobacco use and exposure to environmental tobacco smoke. The related systematic reviews are linked by a common conceptual approach. These reviews form the basis of recommendations by the Task Force on Community Preventive Services (TFCPS) regarding the use of these selected interventions. The TFCPS recommendations are presented on page 67 of this supplement.


Asunto(s)
Servicios de Salud Comunitaria/organización & administración , Guías de Práctica Clínica como Asunto , Servicios Preventivos de Salud/organización & administración , Cese del Hábito de Fumar , Contaminación por Humo de Tabaco/prevención & control , Adolescente , Adulto , Medicina Basada en la Evidencia , Humanos , Contaminación por Humo de Tabaco/efectos adversos , Estados Unidos
14.
Br J Ophthalmol ; 83(2): 209-18, 1999 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10396201

RESUMEN

AIM: To determine if the isoforms of transforming growth factor beta (TGF-beta) are present in fetal, normal adult, and glaucomatous optic nerve heads. METHODS: To localise cells synthesising TGF-beta, optic nerve heads were stained using antibodies to TGF-beta 1, TGF-beta 2, and TGF-beta 3. To demonstrate synthesis, human optic nerve heads from fetal, glaucomatous, and normal age matched subjects were explanted, cultured overnight, and the culture supernatant was assayed for the presence of TGF-beta 1 and TGF-beta 2 by bioassay. In addition, semiquantitative RT-PCR was performed to determine the gene expression pattern of TGF-beta 2. RESULTS: Immunohistochemistry of glaucomatous samples revealed the presence of intense staining for TGF-beta 2 primarily in astrocytes, whereas TGF-beta 1 was localised to blood vessels. No TGF-beta 3 immunoreactivity was observed. There was little or no expression of TGF-beta in normal optic nerve heads. Optic nerve heads from glaucomatous eyes released 70-100-fold more TGF-beta 2 than normal age matched optic nerve heads. Fetal optic nerve heads released 90-100-fold more TGF-beta 2 than normal adult optic nerve heads. TGF-beta 1 was undetectable by bioassay in all samples tested. There was no apparent increase in TGF-beta 2 gene expression in glaucomatous and fetal eyes, suggesting post-transcriptional regulatory mechanisms. CONCLUSIONS: These results demonstrate that TGF-beta 2 is produced in high levels in the fetal and glaucomatous optic nerve heads, perhaps by a mechanism of post-transcriptional regulation. TGF-beta may be important during development of the optic nerve head and, in glaucoma, TGF-beta 2 may be a mediator of astrocyte reactivation and extracellular matrix remodelling in the lamina cribrosa.


Asunto(s)
Glaucoma de Ángulo Abierto/metabolismo , Disco Óptico/metabolismo , Factor de Crecimiento Transformador beta/biosíntesis , Anciano , Anciano de 80 o más Años , Biomarcadores , Femenino , Feto , Expresión Génica , Humanos , Inmunohistoquímica , Masculino , Persona de Mediana Edad
15.
Adv Exp Med Biol ; 342: 143-8, 1993.
Artículo en Inglés | MEDLINE | ID: mdl-8209721

RESUMEN

We have genetically characterized a nucleocapsid (N) protein mutant of the coronavirus mouse hepatitis virus (MHV). This mutant, designated Alb4, is both temperature-sensitive and thermolabile, and its N protein is smaller than wild-type N. Sequence analysis of the Alb4 N gene revealed that it contains an internal deletion of 87 nucleotides, producing an in-frame deletion of 29 amino acids. All of these properties of Alb4 made it ideal for use as a recipient in a targeted RNA recombination experiment in which the deletion in Alb4 was repaired by recombination with synthetic RNA7, the smallest MHV subgenomic mRNA. Progeny from a cotransfection of Alb4 genomic RNA and synthetic RNA7 were selected for thermal stability. PCR analysis of candidate recombinants showed that they had regained the material that is deleted in the Alb4 mutant. They also had acquired a five nucleotide insertion in the 3' untranslated region, which had been incorporated into the synthetic RNA7 as a molecular tag. The presence of the tag was directly verified, as well, by sequencing the genomic RNA of purified recombinant viruses. This provided a clear genetic proof that the Alb4 phenotype was due to the observed deletion in the N gene. In addition, these results demonstrated that it is possible to obtain stable, independently replicating progeny from recombination between coronaviral genomic RNA and a tailored, synthetic RNA species. To date, we have constructed three additional mutants by this procedure. For two of these, a second-site point mutation that reverts the Alb4 phenotype has been transduced into a wild type background, which does not contain the Alb4 deletion.(ABSTRACT TRUNCATED AT 250 WORDS)


Asunto(s)
Cápside/genética , Genoma Viral , Virus de la Hepatitis Murina/genética , Mutagénesis Sitio-Dirigida , ARN Viral/genética , Recombinación Genética , Proteínas del Núcleo Viral/genética , Secuencia de Aminoácidos , Genes Virales , Datos de Secuencia Molecular , Mutación Puntual , Reacción en Cadena de la Polimerasa , Proteínas Estructurales Virales/genética
16.
Ann Fr Anesth Reanim ; 3(5): 346-50, 1984.
Artículo en Francés | MEDLINE | ID: mdl-6497079

RESUMEN

The useful intramuscular premedication dose of midazolam was determined in 100 children divided up in three age groups: one month to three years, 3 to 10 years, 10 to 15 years. All biometric parameters were normal for the age, and comparable between similar age groups. Haemodynamic and respiratory parameters were not altered by the premedication. The reduction in anxiety, as assessed by the child's behaviour, was good or excellent in more than 85% of cases from all age groups; it was proportional to the dose used. The doses that had, for equivalent reductions in anxiety as assessed by the chi-square test, the least hypnotic effect, were: 0.5 mg X kg-1 before three years of age, 0.4 mg X kg-1 for the 3 to 10 yr olds, and 0.25 mg X kg-1 for the 10 to 15 yr olds. This fall in dose with age, quite usual in paediatrics, was not unexpected. The level of consciousness, one hour after surgery, was always normal. No undesirable side-effect was observed. These results, together with its physical, chemical and pharmacodynamic characteristics, make midazolam a choice drug for intramuscular premedication in children, with a foreseeable use in day-care anaesthesia. The unexpected finding of an age-dependent dissociation between the reduction in anxiety and the hypnotic effect is discussed in the light of a study carried out in the adult and recent data from the literature.


Asunto(s)
Benzodiazepinas/administración & dosificación , Medicación Preanestésica , Adolescente , Factores de Edad , Procedimientos Quirúrgicos Ambulatorios , Benzodiazepinas/farmacología , Niño , Preescolar , Hemodinámica/efectos de los fármacos , Humanos , Lactante , Inyecciones Intramusculares , Midazolam , Respiración/efectos de los fármacos
17.
Ann Fr Anesth Reanim ; 3(3): 185-8, 1984.
Artículo en Francés | MEDLINE | ID: mdl-6742538

RESUMEN

The present study aimed to assess the pharmaco-clinical profile of infants premedicated with rectal midazolam. The results were compared with those of a reference drug, flunitrazepam. Infants undergoing minor surgery were divided into three groups: group A (n = 30), with a mean age of 15.8 +/- 13.2 months and a mean weight of 8.6 +/- 3.3 kg, receiving 0.33 mg X kg-1 flunitrazepam; group B (n = 15), with a mean age of 11.2 +/- 10.7 months and a mean weight of 9.3 +/- 3.1 kg, receiving 0.3 mg X kg-1 midazolam; and group C (n = 30), with a mean age of 15.5 +/- 9.1 months and a mean weight of 10.7 +/- 2.5 kg, receiving 0.4 mg X kg-1 midazolam. An aqueous solution of each drug was administered with atropine sulfate (0.02 mg X kg-1) 20 min prior to induction of anaesthesia. The drug was well tolerated in 84% of cases. Statistically significant haemodynamic changes consisted of: a 9 c X min-1 decrease in heart rate (p less than 0.05) and a 12 mmHg decrease in systolic and diastolic blood pressures (p less than 0.05) in group C; a 6 mmHg decrease in systolic blood pressure (p less than 0.05) in group B. The tranquilizer action was either excellent or good in 93% of groups B and C compared with only 40% in group A (p less than 0.001 in both cases). Somnolence was attained in 60% of group A, 26.6% of group B and 30% of group C. A mask was much better accepted in group C (86.6%) than in group B (66.6%; p less than 0.05) or in group A (36.6%; p less than 0.01). Therefore, midazolam given rectally at 0.4 mg X kg-1 was better than flunitrazepam, because of a greater therapeutic effect for an equivalent rate of side effects.


Asunto(s)
Anestesia Rectal , Anestésicos , Benzodiazepinas , Flunitrazepam , Factores de Edad , Benzodiazepinas/administración & dosificación , Flunitrazepam/administración & dosificación , Humanos , Lactante , Midazolam
19.
Ann Cardiol Angeiol (Paris) ; 63(5): 312-20, 2014 Nov.
Artículo en Francés | MEDLINE | ID: mdl-25283574

RESUMEN

BACKGROUND: International guidelines have recommendations for selecting the type of reperfusion (fibrinolysis or angioplasty) in the setting of ST-segment elevation myocardial infarction (STEMI), and suggest that emergency-care networks adapt these recommendations according to the local environment. AIM: To assess the proportions of STEMI patients treated with fibrinolysis or angioplasty in accordance with regional guidelines. METHOD: Observational study based on a permanent registry of patients with STEMI of <12h duration in an emergency network in the French North Alps (Isère, Savoie, Haute-Savoie) from January 2009 to December 2012. RESULTS: The registry included 2620 patients. Reperfusion was given in 2425/2620 (93%) of patients. Reperfusion type was in accordance with recommendations in 1567/2620 (60%) patients. Guideline-recommended fibrinolysis and angioplasty were performed in 47% (656/1385) and 79% (911/1149) respectively, of patients. In multivariable analysis, variables independently associated with guideline-recommended reperfusion were: an age < 65 years (OR 1.60; 95%CI 1.33-1.90), being managed in Haute-Savoie versus Isère or Savoie (OR 1.38; 95%CI 1.12-1.71), an arterial tension < 100mmHg (OR 1.73; 95%CI 1.27-2.35), a cardiogenic shock (OR 0.50; 95%CI 0.30-0.84), a pacemaker or left bundle branch block (OR 0.49; 95%CI 0.28-0.88), and an initial management outside the network (followed by treatment in an interventional centre in the network) (OR 0.62; 95%CI 0.40-0.94). Patients initially treated by mobile intensive care units were more often reperfused in accordance with recommendations when admitted < 3 (versus ≥ 3) h following symptom onset (adjusted OR 2.05; 95% CI 1.61-2.59), while those initially treated by in-hospital emergency units were less often reperfused in accordance with recommendation when treated < 3h following symptom onset (adjusted OR 0.67; 95% CI 0.46-0.97). In-hospital major adverse cardiac events (9.1% vs. 8.5%) and in-hospital mortality (6.4% vs. 5.1%) were not significantly different between patients reperfused in accordance with (versus not) recommendations. CONCLUSIONS: Forty percent of patients with STEMI were not reperfused with fibrinolysis or angioplasty in accordance with regional guidelines. Characterization of this population should allow us to improve guideline adherence.


Asunto(s)
Angioplastia Coronaria con Balón , Electrocardiografía , Fibrinólisis , Adhesión a Directriz , Infarto del Miocardio/diagnóstico , Infarto del Miocardio/terapia , Reperfusión Miocárdica/métodos , Anciano , Servicio de Urgencia en Hospital , Femenino , Francia , Mortalidad Hospitalaria , Humanos , Masculino , Persona de Mediana Edad , Unidades Móviles de Salud , Análisis Multivariante , Infarto del Miocardio/mortalidad
20.
Arch Pediatr ; 18(8): 905-13, 2011 Aug.
Artículo en Francés | MEDLINE | ID: mdl-21723713

RESUMEN

Neuropathic pain exists in children and its incidence is often underestimated due to the lack of knowledge on the existence and the diagnosis of this pain. Although the semiological characteristics can be compared to those of the adult (allodynia, hypoesthesia, burning and stabbing sensations), their etiology often differs, and pain treatments are more limited because of a lack of pharmacological data and the absence of clinical studies. Therapeutic management is sometimes insufficient and requires better knowledge of this entity. Based on the June 2009 recommendations of the French Agency for Food and Drug Safety (Afssaps) (drug therapy in acute and chronic pain in children), this article presents a review of the data available in the literature on the subject, taking into account expert opinion and proposing clinical recommendations of good practice for the recognition and the treatment of neuropathic pain in children.


Asunto(s)
Neuralgia/terapia , Niño , Humanos , Neuralgia/diagnóstico , Guías de Práctica Clínica como Asunto , Encuestas y Cuestionarios
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