Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 125
Filtrar
Más filtros

Intervalo de año de publicación
1.
Am J Med Genet A ; 194(7): e63582, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38450833

RESUMEN

We present three new and six published infants with overlapping features of LUMBAR syndrome (lower body hemangioma, urogenital anomalies, spinal cord malformations, bony deformities, anorectal/arterial anomalies and renal anomalies) and OEIS complex (omphalocele, exstrophy, imperforate anus, and spinal defects), also known as cloacal exstrophy. OEIS is included under the recently proposed umbrella coined recurrent constellations of embryonic malformations (RCEMs). The RCEMs represent a phenotypically overlapping spectrum of rare disorders of caudal dysgenesis with unknown cause but likely shared pathogenesis. It has recently been proposed that LUMBAR be considered an RCEM. This report of infants with combined features of OEIS and LUMBAR is the first to demonstrate an overlap between LUMBAR and another RCEM, which supports LUMBAR's inclusion within the RCEM spectrum.


Asunto(s)
Anomalías Múltiples , Ano Imperforado , Humanos , Ano Imperforado/genética , Ano Imperforado/patología , Ano Imperforado/diagnóstico , Anomalías Múltiples/genética , Anomalías Múltiples/patología , Anomalías Múltiples/diagnóstico , Femenino , Masculino , Recién Nacido , Anomalías Urogenitales/genética , Anomalías Urogenitales/diagnóstico , Anomalías Urogenitales/patología , Hernia Umbilical/diagnóstico , Hernia Umbilical/patología , Lactante , Síndrome , Cloaca/anomalías , Cloaca/patología , Hemangioma/patología , Hemangioma/diagnóstico , Hemangioma/genética , Fenotipo , Columna Vertebral/anomalías , Columna Vertebral/patología , Columna Vertebral/diagnóstico por imagen , Escoliosis
2.
Parasite Immunol ; 39(4)2017 04.
Artículo en Inglés | MEDLINE | ID: mdl-28295446

RESUMEN

Helminthiasis may ameliorate inflammatory diseases, such as inflammatory bowel disease and asthma. Information about immunomodulators from Ascaris lumbricoides is scarce, but could be important considering the co-evolutionary relationships between helminths and humans. We evaluated the immunomodulatory effects of a recombinant cystatin from A. lumbricoides on an acute model of dextran sodium sulphate (DSS)-induced colitis in mice. From an A. lumbricoides cDNA library, we obtained a recombinant cystatin (rAl-CPI). Protease activity inhibition was demonstrated on cathepsin B and papain. Immunomodulatory effects were evaluated at two intraperitoneal doses (0.5 and 0.25 µg/G) on mice with DSS-induced colitis. Body weight, colon length, Disease Activity Index (DAI), histological inflammation score, myeloperoxidase (MPO) activity, gene expression of cytokines and cytokines levels in colon tissue were analysed. Treatment with rAl-CPI significantly reduced DAI, MPO activity and inflammation score without toxic effects. Also, IL-10 and TGF-B gene overexpression was observed in rAl-CPI-treated group compared to DSS-exposed control and healthy mice. Furthermore, a reduction in IL-6 and TNF-A expression was found, and this was confirmed by the levels of these cytokines in colonic tissue. In conclusion, rAl-CPI reduces inflammation in a mouse model of DSS-induced colitis, probably by increasing the expression of anti-inflammatory cytokines and reducing pro-inflammatory ones.


Asunto(s)
Colitis/inmunología , Colitis/terapia , Cistatinas/administración & dosificación , Inmunosupresores/administración & dosificación , Animales , Ascaris lumbricoides/genética , Colitis/inducido químicamente , Colitis/patología , Colon/metabolismo , Cistatinas/genética , Cistatinas/inmunología , Citocinas/análisis , Sulfato de Dextran , Modelos Animales de Enfermedad , Femenino , Humanos , Inmunosupresores/inmunología , Inflamación/patología , Ratones , Ratones Endogámicos BALB C , Proteínas Recombinantes/genética , Proteínas Recombinantes/inmunología , Proteínas Recombinantes/uso terapéutico
3.
Rev Neurol (Paris) ; 173(4): 180-188, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-28131534

RESUMEN

Craniopharyngiomas (CPs) are benign epithelial tumors that develop along the hypothalamus-hypophyseal axis and were first described by Jakob Erdheim in 1904. These tumors have represented a challenge for surgeons since the rise of modern neurosurgery. The study of CPs is linked to the development of this surgical discipline in parallel with neuroendocrinology within the French school of neurology, led by Joseph Babinski. For the present study, all CP cases published in the French scientific literature before the development of modern neuroradiology were gathered, and 65 cases that underwent surgical procedures between 1921 and 1973 were selected. From our analysis of them, useful information has been obtained that can be applied to the management of CPs today. Most tumors were adamantinomatous CPs (62 patients) with an infundibulo-tuberal location (40.6%). The most frequent surgical route employed was subfrontal (69%). Selection of the surgical approach and degree of removal did not appear to have been influenced by the presumed topography of the tumor, and resulted in a poor outcome in 47% of patients. However, the authors were able to recognize the presence of symptoms indicating that the tumor had caused hypothalamic and/or infundibular damage, such as seen in the infundibulo-tuberal syndrome, first described by Claude and Lhermitte in 1917. At present, the optimal surgical approach and degree of removal are still the subject of debate, although the presence of clinical signs pointing to hypothalamic involvement by CPs should always be preoperatively accurately assessed to improve surgical outcomes.


Asunto(s)
Neoplasias Encefálicas/historia , Neoplasias Encefálicas/cirugía , Craneofaringioma/historia , Craneofaringioma/cirugía , Neurología/historia , Neurocirugia/historia , Adolescente , Adulto , Niño , Femenino , Francia , Historia del Siglo XX , Humanos , Masculino , Persona de Mediana Edad , Procedimientos Neuroquirúrgicos/historia , Adulto Joven
4.
Int J Legal Med ; 130(2): 381-5, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26071183

RESUMEN

Methylone is a synthetic derivative of cathinone. It is sold principally on the Internet in powder form under the name «bath salts¼. Deaths following consumption are very rare. This report details the first case of a death in France (a 21-year-old man), following ingestion of methylone during an evening with friends. Anoxia was observed at the time of autopsy. Toxicological analyses highlighted a consumption of methylone and cannabis. However, biological analyses showed an absence of ethanol, cocaine, amphetamines, and opiate derivatives. Likewise, no medications were found. High concentrations of methylone were found in the peripheral blood (3.13 mg/L) and in the central blood (6.64 mg/L). Its presence in the gastric contents provides evidence that the substance was taken orally. The dosage of δ9-tetrahydrocannabinol (THC) suggests a recent cannabis consumption (THC 12.9 µg/L, THC-COOH 29.3 µg/L, 11-OH-THC 4.9 µg/L). This case illustrates that the consumption of methylone, which has a reputation of being less «powerful¼ than ecstasy, is not without its dangers.


Asunto(s)
Estimulantes del Sistema Nervioso Central/análisis , Estimulantes del Sistema Nervioso Central/envenenamiento , Metanfetamina/análogos & derivados , Administración Oral , Bilis/química , Estimulantes del Sistema Nervioso Central/administración & dosificación , Cromatografía Líquida de Alta Presión , Dronabinol/análisis , Toxicología Forense , Cromatografía de Gases y Espectrometría de Masas , Contenido Digestivo/química , Humanos , Masculino , Metanfetamina/administración & dosificación , Metanfetamina/análisis , Metanfetamina/envenenamiento , Psicotrópicos/análisis , Trastornos Relacionados con Sustancias/complicaciones , Cuerpo Vítreo/química , Adulto Joven
5.
Radiat Environ Biophys ; 53(2): 241-54, 2014 May.
Artículo en Inglés | MEDLINE | ID: mdl-24557539

RESUMEN

In the case of a large scale radiation accident high throughput methods of biological dosimetry for population triage are needed to identify individuals requiring clinical treatment. The dicentric assay performed in web-based scoring mode may be a very suitable technique. Within the MULTIBIODOSE EU FP7 project a network is being established of 8 laboratories with expertise in dose estimations based on the dicentric assay. Here, the manual dicentric assay was tested in a web-based scoring mode. More than 23,000 high resolution images of metaphase spreads (only first mitosis) were captured by four laboratories and established as image galleries on the internet (cloud). The galleries included images of a complete dose effect curve (0-5.0 Gy) and three types of irradiation scenarios simulating acute whole body, partial body and protracted exposure. The blood samples had been irradiated in vitro with gamma rays at the University of Ghent, Belgium. Two laboratories provided image galleries from Fluorescence plus Giemsa stained slides (3 h colcemid) and the image galleries from the other two laboratories contained images from Giemsa stained preparations (24 h colcemid). Each of the 8 participating laboratories analysed 3 dose points of the dose effect curve (scoring 100 cells for each point) and 3 unknown dose points (50 cells) for each of the 3 simulated irradiation scenarios. At first all analyses were performed in a QuickScan Mode without scoring individual chromosomes, followed by conventional scoring (only complete cells, 46 centromeres). The calibration curves obtained using these two scoring methods were very similar, with no significant difference in the linear-quadratic curve coefficients. Analysis of variance showed a significant effect of dose on the yield of dicentrics, but no significant effect of the laboratories, different methods of slide preparation or different incubation times used for colcemid. The results obtained to date within the MULTIBIODOSE project by a network of 8 collaborating laboratories throughout Europe are very promising. The dicentric assay in the web based scoring mode as a high throughput scoring strategy is a useful application for biodosimetry in the case of a large scale radiation accident.


Asunto(s)
Cromosomas Humanos/genética , Cromosomas Humanos/efectos de la radiación , Conducta Cooperativa , Internet , Liberación de Radiactividad Peligrosa , Radiometría/métodos , Triaje , Aberraciones Cromosómicas/efectos de la radiación , Humanos , Dosis de Radiación , Factores de Tiempo
6.
J Mater Sci Mater Med ; 25(1): 163-72, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24022801

RESUMEN

The use of biocompatible materials has attained an increasing importance for tissue regeneration and transplantation. The excellent mechanical and corrosion properties of Ti40Cu38Zr10Pd12 bulk metallic glass (BMG) turn it into a potential candidate for its use in orthopaedic implants. Before being considered as a biomaterial, some biological parameters must be taken into account. In this study,mouse preosteoblasts were cultured in the presence or absence of the alloy at different times (24 h, 7 and 21 days) and no differences in cell viability were detected.Moreover, cells were able to adhere to the alloy surface by establishing focal contacts, and displayed a flattened polygonal morphology. After 14 days in culture, differentiation into osteoblasts was observed. Besides, the amount of Cu ions released and their potential toxic effects were analyzed, showing that the amount of Cu released did not increase cell death. Finally, the low levels of inflammatory cytokines secreted by THP-1 differentiated macrophages exposed to the alloy suggest the absence of an immunogenic response to the alloy. In conclusion, in vitro studies indicate that the Ti40Cu38Zr10Pd12 BMG could be considered as a biomaterial to be used in orthopaedic implants.


Asunto(s)
Aleaciones/química , Aleaciones/toxicidad , Materiales Biocompatibles/química , Materiales Biocompatibles/toxicidad , Vidrio/química , Células 3T3 , Animales , Adhesión Celular/efectos de los fármacos , Diferenciación Celular/efectos de los fármacos , Línea Celular , Supervivencia Celular/efectos de los fármacos , Cobre/análisis , Cobre/toxicidad , Citocinas/biosíntesis , Humanos , Macrófagos/efectos de los fármacos , Macrófagos/inmunología , Ensayo de Materiales , Ratones , Osteoblastos/citología , Osteoblastos/efectos de los fármacos , Prótesis e Implantes
7.
Med Sci Law ; 54(4): 219-29, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24534146

RESUMEN

BACKGROUND: Compensation of diethylstilbestrol exposure depends on the judicial system. In France, girls having been exposed to diethylstilbestrol are currently being compensated, and each exposure victim is being evaluated. Fifty-nine expert evaluations were studied to determine the causal relation between exposure to diethylstilbestrol and the pathologies attributable to diethylstilbestrol. METHODS: The following were taken into consideration: age at the first signs of the pathology; age of the sufferer at the time of evaluation; the pathologies grouped into five categories: fertility disorders - cancers - mishaps during pregnancy - psychosomatic complaints - pathologies of "3rd generation DES victims"; submission of proof of DES exposure; the degree of causality determined (direct, indirect, ruled out). RESULTS: 61% of the cases related to fertility disorders, 28.8% to cancer pathologies (clear-cell adenocarcinoma), 18.6% to mishaps during pregnancy, 8.5% to disorders resulting from preterm delivery, and 3.4% to psychosomatic disorders. Some cases involved a combination of two types of complaints. Indirect causality was determined in 47.1% of the cases involving primary sterility, in 66.7% involving secondary sterility, and in 5 out of 6 cases of total sterility. There is direct causality between in utero diethylstilbestrol exposure and vaginal or cervical clear cell adenocarcinoma. Causality is indirect in the case of disorders linked to prematurity in third generation victims. CONCLUSION: Causality was determined by the experts on the basis of scientific criteria which attribute the presenting pathologies to diethylstilbestrol exposure. When other risk factors come into play, or when exposure is indirect (third generation), this causality is diminished.


Asunto(s)
Adenocarcinoma de Células Claras/inducido químicamente , Dietilestilbestrol/efectos adversos , Estrógenos no Esteroides/efectos adversos , Efectos Tardíos de la Exposición Prenatal , Neoplasias del Cuello Uterino/inducido químicamente , Neoplasias Vaginales/inducido químicamente , Adenocarcinoma de Células Claras/epidemiología , Adolescente , Adulto , Compensación y Reparación/legislación & jurisprudencia , Femenino , Francia/epidemiología , Humanos , Lactante , Infertilidad Femenina/epidemiología , Embarazo , Complicaciones del Embarazo/epidemiología , Neoplasias del Cuello Uterino/epidemiología , Neoplasias Vaginales/epidemiología , Adulto Joven
8.
Mutat Res ; 756(1-2): 174-83, 2013 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-23707243

RESUMEN

Mass casualty scenarios of radiation exposure require high throughput biological dosimetry techniques for population triage in order to rapidly identify individuals who require clinical treatment. The manual dicentric assay is a highly suitable technique, but it is also very time consuming and requires well trained scorers. In the framework of the MULTIBIODOSE EU FP7 project, semi-automated dicentric scoring has been established in six European biodosimetry laboratories. Whole blood was irradiated with a Co-60 gamma source resulting in 8 different doses between 0 and 4.5Gy and then shipped to the six participating laboratories. To investigate two different scoring strategies, cell cultures were set up with short term (2-3h) or long term (24h) colcemid treatment. Three classifiers for automatic dicentric detection were applied, two of which were developed specifically for these two different culture techniques. The automation procedure included metaphase finding, capture of cells at high resolution and detection of dicentric candidates. The automatically detected dicentric candidates were then evaluated by a trained human scorer, which led to the term 'semi-automated' being applied to the analysis. The six participating laboratories established at least one semi-automated calibration curve each, using the appropriate classifier for their colcemid treatment time. There was no significant difference between the calibration curves established, regardless of the classifier used. The ratio of false positive to true positive dicentric candidates was dose dependent. The total staff effort required for analysing 150 metaphases using the semi-automated approach was 2 min as opposed to 60 min for manual scoring of 50 metaphases. Semi-automated dicentric scoring is a useful tool in a large scale radiation accident as it enables high throughput screening of samples for fast triage of potentially exposed individuals. Furthermore, the results from the participating laboratories were comparable which supports networking between laboratories for this assay.


Asunto(s)
Aberraciones Cromosómicas/efectos de la radiación , Cromosomas Humanos/efectos de la radiación , Rayos gamma/efectos adversos , Laboratorios/normas , Linfocitos/efectos de la radiación , Monitoreo de Radiación/métodos , Liberación de Radiactividad Peligrosa/prevención & control , Automatización , Radioisótopos de Cobalto , Relación Dosis-Respuesta en la Radiación , Europa (Continente) , Humanos
9.
Rev Neurol ; 76(2): 47-57, 2023 01 16.
Artículo en Español | MEDLINE | ID: mdl-36631964

RESUMEN

INTRODUCTION: The nationwide lockdown implemented in Spain in March 2020 in response to the 2019 coronavirus disease pandemic (COVID-19) could have had an effect on the clinical situation, disease management and access to care in patients with idiopathic intracranial hypertension. PATIENTS AND METHODS: A cross-sectional observational study was conducted by means of an online survey. The frequency and impact of headache, visual symptoms, dizziness, cognitive symptoms, diplopia, anxiety and depression on patients' quality of life were recorded. Disease treatment and delays experienced in accessing care were recorded. Participants were grouped according to the time elapsed since diagnosis. RESULTS: A total of 112 patients participated in the study (103 women). The average time since disease onset was 6.25 years. Headache, anxiety and depression were responsible for considerable impact in the period prior to lockdown. The impact of headache was not aggravated during lockdown, but anxiety and depression did become significantly worse. Recently diagnosed participants reported higher rates of anxiety, depression, dizziness and diplopia; chronically diagnosed participants reported a higher frequency of cognitive symptoms. CONCLUSIONS: The clinical situation of the participants deteriorated during lockdown, although the differences were smaller than previously thought. This was probably because the baseline situation was more severe than expected. Further studies are needed to clarify the medium and long-term impact of the COVID-19 pandemic on patients with idiopathic intracranial hypertension.


TITLE: Impacto del confinamiento por COVID-19 en pacientes con hipertensión intracraneal idiopática en España.Introducción. El confinamiento nacional instaurado en España en marzo de 2020 como respuesta a la pandemia por la enfermedad por coronavirus 2019 (COVID-19) pudo tener un efecto en la situación clínica, el manejo de la enfermedad y el acceso a la atención médica en pacientes con hipertensión intracraneal idiopática. Pacientes y métodos. Se realizó un estudio observacional transversal por medio de una encuesta en línea. Se registraron la frecuencia y el impacto en la calidad de vida de la cefalea, los síntomas visuales, el mareo, los síntomas cognitivos, la diplopía, la ansiedad y la depresión. Se registró el tratamiento de la enfermedad y los retrasos experimentados en el acceso a la atención médica. Se agrupó a los participantes según el tiempo de evolución desde el diagnóstico. Resultados. Participaron 112 pacientes (103 mujeres). El tiempo medio de evolución de la enfermedad fue 6,25 años. La cefalea, la ansiedad y la depresión fueron responsables de un impacto considerable en el período previo al confinamiento. El impacto de la cefalea no empeoró durante el confinamiento, pero la ansiedad y la depresión empeoraron significativamente. Los participantes diagnosticados recientemente comunicaron mayores tasas de ansiedad, depresión, mareo y diplopía; los de evolución crónica, mayor frecuencia de síntomas cognitivos. Conclusiones. La situación clínica de los participantes se deterioró durante el confinamiento, aunque las diferencias fueron menores de lo que se pensaba. Esto se debió, probablemente, a que la situación basal era más grave de lo esperado. Son necesarios más estudios para aclarar el impacto a medio y largo plazo de la pandemia por COVID-19 en pacientes con hipertensión intracraneal idiopática.


Asunto(s)
COVID-19 , Seudotumor Cerebral , Humanos , Femenino , COVID-19/epidemiología , COVID-19/psicología , Calidad de Vida , España/epidemiología , Pandemias , Estudios Transversales , Mareo , Diplopía , Seudotumor Cerebral/epidemiología , Control de Enfermedades Transmisibles , Ansiedad/epidemiología , Ansiedad/etiología , Cefalea/epidemiología , Cefalea/etiología , Depresión/epidemiología , Depresión/psicología
11.
Bull Entomol Res ; 102(4): 406-14, 2012 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22289142

RESUMEN

Knowledge on colonization modes and interplant movement of Nasonovia ribisnigri can contribute to the development of optimal control of this pest. The aim of this study was to determine the spatio-temporal distribution and the mode of spread between adult morphs of Nasonovia ribisnigri, comparing spring and autumn lettuce protected crops. The spatial and temporal pattern was analyzed using the spatial analysis by distance indices (SADIE) methodology and other related displacement indices. The population size of N. ribisnigri was greater in the autumn than in the spring growing seasons due to milder temperatures. The percentage of plants colonized by aphids was higher in spring than in autumn, showing the great dispersal potential of this aphid species independent of their population size. Differential propensity for initial displacement from the central plant was observed between adult morphs in spring, resulting in a greater ability of apterous than alate aphids to spread far away from the source plant. In autumn, both adult morphs showed an initial reduced displacement; however, the number of plants infested (≈20%) with at least one aphid at this initial time (seven days) was similar for both adult morphs and both growing seasons. Analysis of the spatial pattern of both adult morphs revealed a predominantly random distribution for both spring and autumn trials. This pattern was achieved by a prevalent random movement over the area (γ≈0.5). These results highlight the ability of the apterous N. ribisnigri to spread within greenhouse lettuce crops early in the spring, suggesting that detection of the pest by deep visual inspection is required after lettuce emergence.


Asunto(s)
Áfidos/fisiología , Lactuca/parasitología , Distribución Animal , Animales , Locomoción , Densidad de Población , Estaciones del Año , Temperatura
12.
AJNR Am J Neuroradiol ; 43(9): 1333-1340, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35953277

RESUMEN

BACKGROUND AND PURPOSE: Papillary craniopharyngiomas (PCPs) are particularly challenging lesions requiring accurate diagnosis to plan the best therapy. Our aim was to define a narrow duct-like recess identified on MR imaging at the base of papillary craniopharyngiomas with a strict third ventricle location. MATERIALS AND METHODS: A duct-like recess at the infundibular portion of craniopharyngiomas was observed on conventional T1WI and T2WI in 3 strict third ventricle papillary craniopharyngiomas in our craniopharyngioma series (n = 125). We systematically investigated this finding on the MR imaging of 2582 craniopharyngiomas and 10 other categories of third ventricle tumors (n = 690) published in the modern era (1986-2020). The diagnostic value and significance of this finding are addressed. RESULTS: The duct-like recess was recognized in 52 papillary craniopharyngiomas, including 3 of our own cases, as a narrow canal-shaped cavity invaginated at the tumor undersurface, just behind the optic chiasm. This structure largely involves papillary craniopharyngiomas with a strict third ventricle topography (96%), follows the same diagonal trajectory as the pituitary stalk, and finishes at a closed end. The duct-like recess sign identifies the papillary craniopharyngioma type with a specificity of 100% and a sensitivity of 38% in the overall craniopharyngioma population. This finding can also establish the strictly intra-third ventricle location of the lesion with a 90% specificity and 33% sensitivity. These recesses appear as hypointense circular spots on axial/coronal T1WI and T2WI. Their content apparently corresponds to CSF freely flowing within the suprasellar cistern. CONCLUSIONS: The presence of a duct-like recess at the infundibular portion of a third ventricle tumor represents a distinctive hallmark of papillary craniopharyngiomas that can be used as a simple MR imaging sign to reliably diagnose these lesions.


Asunto(s)
Craneofaringioma , Neoplasias Hipofisarias , Tercer Ventrículo , Humanos , Craneofaringioma/diagnóstico por imagen , Neoplasias Hipofisarias/diagnóstico por imagen , Tercer Ventrículo/diagnóstico por imagen , Tercer Ventrículo/patología , Hipófisis , Imagen por Resonancia Magnética
13.
Neurologia (Engl Ed) ; 37(7): 543-549, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34544671

RESUMEN

BACKGROUND: Hospital on-call neurology shifts are frequently on-site, but some on-call services may be off-site or mixed. Intravenous tissue plasminogen activator (tPA) is one of the main reperfusion treatments for acute ischaemic stroke (AIS). This study assesses door-to-needle times (DNT) when the neurologist is on-site or off-site. METHODS: We performed a prospective, observational study from 2012 to 2017, including patients with AIS and treated with tPA. Data were collected on sex, age, door-to-scan time, scan-to-needle time, and DNT. The on-duty neurologist was on-site from 08:00 to 20:00, and on call but off-site from 20:00 to 8:00. Three groups were formed: on-site, off-site, and off-site with resident present. RESULTS: Our sample included 138 patients. The mean age was 69.7 years, and 45.7% of patients were women. Ninety-six patients were admitted during the on-site shift, 25 during the off-site shift, and 17 during the off-site-resident present shift. Patients admitted during the on-site and off-site shifts presented DNTs of 59 and 72 minutes, respectively (P =  .003). DNTs were 59, 74, and 68 minutes (P =  .001), respectively, for the on-site, off-site, and off-site-resident present shifts; the difference between DNTs for on-site and off-site shifts was statistically significant. No differences were observed between DNTs according to time of day (morning, afternoon, or night), or between weekdays and weekends. CONCLUSION: DNT is influenced by whether the on-duty neurologist is on- or off-site at the time of code stroke activation. The presence of a neurology resident can reduce DNT.


Asunto(s)
Isquemia Encefálica , Accidente Cerebrovascular , Anciano , Isquemia Encefálica/tratamiento farmacológico , Isquemia Encefálica/etiología , Niño , Servicio de Urgencia en Hospital , Femenino , Fibrinolíticos/efectos adversos , Fibrinolíticos/uso terapéutico , Humanos , Masculino , Neurólogos , Estudios Prospectivos , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/etiología , Terapia Trombolítica/efectos adversos , Tiempo de Tratamiento , Activador de Tejido Plasminógeno/uso terapéutico
14.
Phys Rev Lett ; 107(11): 117203, 2011 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-22026699

RESUMEN

We show that a chemically engineered structural asymmetry in [Tb2] molecular clusters renders the two weakly coupled Tb3+ spin qubits magnetically inequivalent. The magnetic energy level spectrum of these molecules meets then all conditions needed to realize a universal CNOT quantum gate. A proposal to realize a SWAP gate within the same molecule is also discussed. Electronic paramagnetic resonance experiments confirm that CNOT and SWAP transitions are not forbidden.

15.
Langmuir ; 27(13): 8302-8, 2011 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-21661741

RESUMEN

In this work, two types of polycrystalline silicon (polysilicon) microparticles were modified with specific ligands in order to be selectively attached to chemical residues located at the plasma membrane and thus to be applied to study individual cells in culture. Two different functionalization approaches based on adsorption and covalent attachment were assayed. A comparative study of the efficiency of the ligand immobilization and stability of the modified particle in the culture medium was carried out using the selected ligands labeled with a fluorophore. Cylindrical microparticles (nonencoded microparticles) and shape-encoded microparticles (bar codes) were used with the aim of demonstrating the nondependence of the particle size and shape on the efficiency of the immobilization protocol. Fluorescence imaging and statistical analysis of the recorded fluorescence intensity showed that the covalent attachment of the ligand to the surface of the microparticle, previously modified with an aldehyde-terminated silane, gave the best results. As a proof of concept, Vero cells in culture were labeled with the covalently modified bar codes and successfully tracked for up to 1 week without observing any alteration in the viability of the cells. Bar code numbers could be easily read by eye using a bright-field optical microscope. It is anticipated that such modified microparticles could be feasible platforms for the introduction of other analytical functions of interest in single-cell monitoring and cell sorting in automatic analysis systems.


Asunto(s)
Polímeros/química , Silicio/química , Animales , Membrana Celular/química , Células Cultivadas , Chlorocebus aethiops , Ligandos , Estructura Molecular , Tamaño de la Partícula , Propiedades de Superficie , Células Vero
16.
J Med Entomol ; 58(4): 1740-1749, 2021 07 16.
Artículo en Inglés | MEDLINE | ID: mdl-33822180

RESUMEN

Flea infestations of wild rabbits were examined monthly in central Spain in a meso-Mediterranean area for 5 yr. A total of 1,180 wild rabbits were trapped and 7,022 fleas were collected from them. Overall, the prevalence was 74.1% with a mean flea index of 5.95 fleas per rabbit. Four flea species were identified: Spilopsyllus cuniculi (Dale, 1878) was the most abundant species (accounting for 74.3% of fleas collected) followed by Xenopsylla cunicularis (Smit, 1957), Odontopsyllus quirosi (Gil Collado, 1934), and Nosopsyllus fasciatus (Bosc, 1800) (18.9, 6.7, and 0.1%, respectively). The highest prevalence was observed in S. cuniculi (48.6%) followed by X. cunicularis, O. quirosi, and N. fasciatus (34.3, 20.0, and 0.6%, respectively). Odontopsyllus quirosi and S. cuniculi were mainly collected from autumn to spring with the peak of infestation in winter, while X. cunicularis was mainly found from spring to autumn with maximum levels of infestation during the summer months. The relevance of these findings is discussed.


Asunto(s)
Interacciones Huésped-Parásitos , Conejos/parasitología , Estaciones del Año , Siphonaptera/fisiología , Animales , Ecosistema , Región Mediterránea , España
17.
Rev Neurol ; 72(4): 141-144, 2021 02 16.
Artículo en Español | MEDLINE | ID: mdl-33570161

RESUMEN

INTRODUCTION: Neurocysticercosis is a parasitic infection of the central nervous system caused by contact with the eggs of the parasite Taenia solium, which subsequently lodge in brain and eye tissue. It manifests itself in the form of cystic lesions scattered throughout the brain parenchyma that are usually small in size and, depending on their stage of development, may appear with associated oedema or with calcifications inside them. CASE REPORT: We report the case of a 63-year-old male visiting due to constitutional symptoms, generalised pain and confusion. A cranial computed axial tomography (CAT) scan showed a right frontoparietal lesion with a cyst-like appearance and surrounding oedema, as well as several smaller lesions with calcifications inside them. Given the pseudotumoural appearance, an extension study was performed and a prostatic adenocarcinoma with universal bone metastases was detected. Treatment with antiparasitic medication and dexamethasone was started, with a good initial response, which later worsened with the onset of left hemiparesis. In the follow-up CAT scan, an increase in the right frontoparietal lesion with increased oedema was observed, related to the inflammatory response to the treatment. After a new course of antiparasitic drugs, the patient maintained a sustained and stable clinical response. CONCLUSIONS: The unusual feature of this case was a rare presentation of neurocysticercosis in the form of a pseudotumoural lesion. Few cases have been reported in the literature, and it is important to maintain a high level of clinical and radiological suspicion, as this type of lesion may be more resistant to the penetration of antiparasitic drugs and require longer treatment and even surgery.


TITLE: Forma tumoral de neurocisticercosis en un paciente con carcinoma de próstata.Introducción. La neurocisticercosis es una infección parasitaria del sistema nervioso central que se produce por contacto con los huevos del parásito Taenia solium, que posteriormente se acantona en el tejido cerebral y ocular. Se manifiesta en forma de lesiones quísticas dispersas por el parénquima cerebral que suelen ser de pequeño tamaño y, dependiendo del estadio evolutivo en el que se presenten, pueden aparecer con edema asociado o con calcificaciones en su interior. Caso clínico. Varón de 63 años que consulta por cuadro constitucional, dolores generalizados y confusión. En la tomografía axial computarizada (TAC) craneal se visualiza una lesión frontoparietal derecha de 4 cm de diámetro, de aspecto quístico y edema circundante, así como varias lesiones de menor tamaño con calcificaciones en su interior. Dado el aspecto pseudotumoral, se realiza un estudio de extensión y se detecta un adenocarcinoma prostático con metástasis óseas universales. Se comienza un tratamiento con antiparasitarios y dexametasona con buena respuesta inicial, y empeora posteriormente con la aparición de una hemiparesia izquierda. En la TAC de control se observa un aumento de la lesión frontoparietal derecha con mayor edema, en relación con la respuesta inflamatoria con el tratamiento. Tras un nuevo ciclo de antiparasitarios, mantiene una respuesta clínica sostenida y estable. Conclusiones. Este caso tiene la peculiaridad de una forma de presentación poco frecuente de neurocisticercosis en forma de lesión pseudotumoral. Existen pocos casos descritos en la bibliografía, y es importante mantener un alto nivel de sospecha clínica y radiológica, ya que este tipo de lesiones puede ser más resistente a la penetración de antiparasitarios y precisar un tratamiento más prolongado e incluso quirúrgico.


Asunto(s)
Adenocarcinoma/complicaciones , Neurocisticercosis/complicaciones , Neoplasias de la Próstata/complicaciones , Humanos , Masculino , Persona de Mediana Edad , Neurocisticercosis/patología
18.
Rehabilitacion (Madr) ; 54(1): 11-18, 2020.
Artículo en Español | MEDLINE | ID: mdl-32007177

RESUMEN

OBJECTIVE: Plantar fasciitis is a common cause of heel pain. The aetiology of this condition remains unclear. Patients typically have pain upon palpation of the medial plantar calcaneal region. Extracorporeal shockwave therapy has shown favourable outcomes in various studies. The aim of this study was to compare the effect of focused extracorporeal shockwave therapy with radial pressure wave therapy. PATIENTS AND METHODS: Seventy-nine non-randomised patients diagnosed with plantar fasciitis were included between January 2017 and June 2018. Patients from the Arnau de Vilanova Hospital in Valencia were treated with focused extracorporeal shockwave therapy, and patients from Llíria Hospital with radial pressure wave therapy. Measured outcome variables were: visual analog scale; ultrasonographic measurement of plantar fascia thickness; self-reported foot-specific pain and disability using the Foot Function Index; self-reported health-related quality of life using the Euroqol-5D; self-reported pain and limitations of activity using the Roles & Maudsley Scale. RESULTS: At inclusion, the 2groups showed no significant differences in demographic or clinical characteristics. Three months after treatment completion, both groups showed improvement in all outcome variables, without statistically significant differences between the 2groups. No adverse effects or complications were observed. CONCLUSIONS: Both extracorporeal shockwave therapy and radial pressure wave therapy are effective treatments for plantar fasciitis.


Asunto(s)
Tratamiento con Ondas de Choque Extracorpóreas/métodos , Fascitis Plantar/terapia , Femenino , Humanos , Masculino , Persona de Mediana Edad , Dimensión del Dolor/métodos , Calidad de Vida
19.
Neurologia (Engl Ed) ; 2019 Nov 25.
Artículo en Inglés, Español | MEDLINE | ID: mdl-31780321

RESUMEN

BACKGROUND: Hospital on-call neurology shifts are frequently on-site, but some on-call services may be off-site or mixed. Intravenous tissue plasminogen activator (tPA) is one of the main reperfusion treatments for acute ischaemic stroke (AIS). This study assesses door-to-needle times (DNT) when the neurologist is on-site or off-site. METHODS: We performed a prospective, observational study from 2012 to 2017, including patients with AIS and treated with tPA. Data were collected on sex, age, door-to-scan time, scan-to-needle time, and DNT. The on-duty neurologist was on-site from 08:00 to 20:00, and on call but off-site from 20:00 to 8:00. Three groups were formed: on-site, off-site, and off-site with resident present. RESULTS: Our sample included 138 patients. The mean age was 69.7 years, and 45.7% of patients were women. Ninety-six patients were admitted during the on-site shift, 25 during the off-site shift, and 17 during the off-site-resident present shift. Patients admitted during the on-site and off-site shifts presented DNTs of 59 and 72minutes, respectively (P=.003). DNTs were 59, 74, and 68minutes (P=.001), respectively, for the on-site, off-site, and off-site-resident present shifts; the difference between DNTs for on-site and off-site shifts was statistically significant. No differences were observed between DNTs according to time of day (morning, afternoon, or night), or between weekdays and weekends. CONCLUSION: DNT is influenced by whether the on-duty neurologist is on- or off-site at the time of code stroke activation. The presence of a neurology resident can reduce DNT.

20.
Int J Obes (Lond) ; 32 Suppl 5: S4-11, 2008 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-19011652

RESUMEN

OBJECTIVE: To provide an overview of the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) design, with particular attention to its quality control procedures. Other important methodological aspects are described in detail throughout this supplement. DESIGN: Description of the HELENA-CSS sampling and recruitment approaches, standardization and harmonization processes, data collection and analysis strategies and quality control activities. RESULTS: The HELENA-CSS is a multi-centre collaborative study conducted in European adolescents located in urban settings. The data management systems, quality assurance monitoring activities, standardized manuals of operating procedures and training and study management are addressed in this paper. Various quality controls to ensure collection of valid and reliable data will be discussed in this supplement, as well as quantitative estimates of measurement error. CONCLUSION: The great advantage of the HELENA-CSS is the strict standardization of the fieldwork and the blood analyses, which precludes to a great extent the kind of immeasurable confounding bias that often interferes when comparing results from isolated studies.


Asunto(s)
Promoción de la Salud/organización & administración , Estudios Multicéntricos como Asunto/métodos , Obesidad/prevención & control , Ensayos Clínicos Controlados Aleatorios como Asunto/métodos , Proyectos de Investigación , Adolescente , Estudios Transversales , Recolección de Datos , Europa (Continente) , Femenino , Humanos , Masculino , Selección de Paciente , Tamaño de la Muestra
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA