Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 124
Filtrar
1.
Afr J Emerg Med ; 10(4): 173-180, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-33299745

RESUMEN

INTRODUCTION: The availability of trained Medical Toxicologists in developing countries is limited and education in Medical Toxicology remains inadequate. The lack of toxicology services contributes to a knowledge gap in the management of poisonings. A need existed to investigate the core competencies required by toxicology graduates to effectively operate in a Poisons Information Centre. The aim of this study was to obtain consensus from an expert group of health care workers on these core competencies. This was done by making use of the Delphi technique. METHODOLOGY: The Delphi survey started with a set of carefully selected questions drawn from various sources including a literature review and exploration of existing curricula. To capture the collective opinion of experts in South Africa, Africa and also globally, three different groups were invited to participate in the study. To build and manage the questionnaire, the secure Research Electronic Data Capture (REDCap) web platform was used. RESULTS: A total of 134 competencies were selected for the three rounds and in the end consensus was reached on 118 (88%) items. Panel members agreed that 113 (96%) of these items should be incorporated in a Medical Toxicology curriculum and five (4%) should be excluded. DISCUSSION: All participants agreed that effective communication is an essential skill for toxicology graduates. The curriculum can address this problem by including effective pedagogy to enhance oral and written communication skills.Feedback from panellists indicated that the questionnaires were country-specific and not necessarily representative of all geographical locations. This is an example of the 'battle of curriculum design' where the context in which the curriculum will be used, will determine the content. CONCLUSION: The Delphi method, based on three iterative rounds and feedback from experts, was effective in reaching consensus on the learning outcomes of a Medical Toxicology curriculum. The study results will ultimately improve education in Medical Toxicology.

2.
Heliyon ; 6(6): e03951, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32529058

RESUMEN

OBJECTIVE: This study aims at understanding the dynamic functional brain organization in Accelerated Cognitive Ageing (ACA) in epilepsy. We also assess to which extend the (abnormal) effective connectivity between brain networks correlates with the (estimated) decline in IQ scores observed in the ACA patients. MATERIAL AND METHODS: Two multi-echo resting-state fMRI scans of 10 ACA patients and 14 age- and education-matched healthy controls were acquired. A task-based fMRI was acquired in-between those two scans, for possible cognitive fatigue effects on reserve capacity. Granger causality (GC), a measure of effective connectivity between brain regions, was applied on 7 major cognitive networks, and group-wise compared, using permutation testing statistics. This was performed on each of the resting-state sessions independently. We assessed the correlation between the cognitive deterioration scores (representing cognitive decline), and the paired-networks granger causality values. RESULTS: The cingulate cortex appeared to be more engaged in ACA patients. Its dynamics towards the right fronto-parietal cortex, salience network, and the dorsal attention networks (DAN) was stronger than in controls, only in the first resting-state scan session. The Granger causality from the DAN to the default mode network (DMN) and from the ventral attention network (VAN) to the left fronto-parietal network (FPL) was also stronger in ACA patients and again only in the first scans. In the second resting-state scans, only the DMN was more strongly connected with the cingulate cortex in ACA patients. A weaker GC from DMN to FPL, and stronger GC from the salience network to cingulate cortex were associated with more decline in the Full-scale IQ and more GC from DMN to VAN would lead to more decline in the Perceptual Reasoning Index in ACA. CONCLUSION: The results are in line with the hypothesis of over-recruitment at low cognitive load, and exhaustion at higher cognitive load, as shown by the compensation-related utilization of neural circuits hypothesis (CRUNCH) model for ageing. Moreover, the DMN to VAN directed connectivity strongly correlates with the (estimated) decline in the Perceptual Reasoning Index, which is also in line with a recent study on ageing with mild cognitive impairment in elderly, and the posterior-anterior shift in aging (PASA) model. This study therefore supports the idea that the cognitive decline in our patients resembles the decline observed in healthy ageing, but in an accelerated mode. This study also sheds light on the directions of the impaired connectivity between the main networks involved in the deterioration process, which can be helpful for future development of treatment solutions.

3.
Musculoskelet Sci Pract ; 47: 102136, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-32148332

RESUMEN

BACKGROUND: Disrupted tactile acuity and poor laterality judgement have been shown in several chronic musculoskeletal pain conditions. Whether they are impaired in people with frozen shoulder (FS) remains unknown. OBJECTIVES: To determine whether there is impairment in tactile acuity and laterality judgement in subjects with FS. METHODS: Thirty-eight subjects with idiopathic FS and 38 sex and age-matched healthy controls were enrolled. The two-point discrimination threshold (TPDT) over the affected and unaffected shoulder of patients with FS and shoulder of healthy controls was evaluated. In addition, all participants performed a left/right judgment task (LRJT). Independent and dependent t-tests were used to compare group means. Pearson-product moment coefficient correlations between pain intensity and duration and LRJT and TPDT were calculated for the FS group. RESULTS: The TPDT over the affected shoulder was significantly increased compared to the unaffected shoulder (mean difference, 3.82 mm; 95% confidence interval [CI]:0.53, 7.10; p = .02) and controls (mean difference, 5.80 mm; 95% CI: 1.09, 10.52; p = .02). Patients with FS were less accurate (mean difference, 5.90%; 95% CI: 0.36, 11.43; p = .03) and slower (mean difference, -0.26 s; 95% CI: 0.06, 0.45; p = .01) responding to images of their affected shoulder compared to their unaffected shoulder. No associations were found between pain intensity and duration and either TPDT or laterality judgement. CONCLUSIONS: Participants with FS demonstrated reduced tactile acuity and impaired laterality judgement over their affected shoulder compared to their unaffected shoulder. When compared to controls, subjects with FS showed reduced tactile acuity. TRIAL REGISTRATION CLINICALTRIALS. GOV IDENTIFIER: NCT03320200.


Asunto(s)
Bursitis/fisiopatología , Lateralidad Funcional/fisiología , Juicio , Hombro/fisiopatología , Percepción del Tacto/fisiología , Adulto , Estudios Transversales , Femenino , Voluntarios Sanos , Humanos , Masculino , Persona de Mediana Edad , España
4.
Seizure ; 69: 207-212, 2019 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-31102826

RESUMEN

PURPOSE: Many young adults with epilepsy are still living with their parents ('failed transition to independence') despite reaching the adult age. This study evaluated patient-related variables and measures of loneliness correlated to 'failed transition to independence' in adults, 25-30 years of age, with (childhood-onset) epilepsy. METHODS: Patients with (childhood-onset) epilepsy and 25-30 years of age were recruited from Epilepsy Center Kempenhaeghe. Inclusion criteria were: diagnosis of (childhood-onset) epilepsy, and an (estimated) IQ > 70. Patients were sent one questionnaire and informed consent was obtained from all participants. Questions included the patient's level of functioning and satisfaction on three transitional domains (medical status, educational/vocational status, independence/separation from their parents), satisfaction with their friendships, and the validated De Jong-Gierveld Loneliness Scale. 'Transition to independence' was defined and categorized in a continuum with scores ranging from 0 ('Failed transition') to 4 for all patients. A Bivariate Correlation analysis was used to compute correlations between patient characteristics and failed transition to independence. RESULTS: 59 patients were included in the analysis, of which 19 (32.2%) had a failed transition to independence. A statistically significant correlation was found between transition to independence and the social loneliness scale (p =  0.047) and the total loneliness scale (p =  0.04), and for the patients self-reported satisfaction with their independence/separation from parents (p =  0.01) and friendships (p =  0.04). CONCLUSIONS: Adults with epilepsy with a failed transition to independence experience loneliness and are not satisfied with their current developmental and social situation.


Asunto(s)
Epilepsia/psicología , Vida Independiente/psicología , Soledad , Adulto , Epilepsia/terapia , Femenino , Vivienda , Humanos , Masculino , Satisfacción Personal , Transportes
7.
Acta Neurol Scand ; 135(2): 231-239, 2017 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-27027847

RESUMEN

OBJECTIVE: To evaluate the efficacy and tolerability of the ketogenic diet (KD) during the first 4 months of a randomized controlled trial (RCT) in refractory epilepsy patients aged 1-18 years. METHODS: Children and adolescents with refractory epilepsy, not eligible for epilepsy surgery, were included. Following 1 month at baseline, patients were randomized to either the KD or to care as usual (CAU).Primary outcome is the proportion of patients with at least 50% reduction in seizure frequency at 4 months. Secondary outcomes are mean percentage of baseline seizures, seizure severity, and side effects. RESULTS: Fifty-seven patients were randomized; nine dropped out, leaving 48 for analysis (i.e., 26 KD, 22 CAU). In an intention-to-treat analysis, 13 patients (50%) treated with the KD and four patients (18.2%) of the CAU group were responders.Mean seizure frequency at 4 months compared to baseline, after removal of two outliers in the KD group, was significantly lower (P = 0.024) in the KD group (56%) (95% CI: 36-76) than in the CAU group (99%) (95% CI: 65-133%).Twice as many patients in the KD group had a relevant decrease in seizure severity score (P = 0.070).Patients treated with the KD had a significantly higher score for gastrointestinal symptoms (P = 0.021) without an increase in the total score of side effects. CONCLUSIONS: This trial provides class I evidence that the KD is an effective therapy in children and adolescents with refractory epilepsy compared with CAU. Most often reported side effects are gastrointestinal symptoms.The study has been registered with the Netherlands Trial Registry (NTR2498).


Asunto(s)
Dieta Cetogénica/métodos , Epilepsia Refractaria/dietoterapia , Epilepsia Refractaria/diagnóstico , Adolescente , Niño , Preescolar , Epilepsia Refractaria/epidemiología , Femenino , Humanos , Lactante , Masculino , Registros Médicos , Países Bajos/epidemiología , Resultado del Tratamiento
8.
Acta Neurol Scand ; 136(1): 47-53, 2017 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27790700

RESUMEN

OBJECTIVES: "Epileptic dementia" is reported in adults with childhood-onset refractory epilepsy. Cognitive deterioration can also occur in a "second-hit model". MATERIALS AND METHODS: We studied the clinical and neuropsychological characteristics of patients with cognitive deterioration (≥1 SD discrepancy between current IQ and premorbid IQ). Memory function, reaction time and processing speed were also evaluated. Analyses were performed to investigate which clinical characteristics correlated with cognitive deterioration. RESULTS: Twenty-seven patients were included with a mean age of 55.7 years old, an average age at epilepsy onset of 33.9 years and a mean duration of 21.8 years. Over 40% had experienced at least one status epilepticus. About 77.8% had at least one comorbid disease (most of (cardio)vascular origin). Cognitive deterioration scores were significant for both Performance IQ and Full Scale IQ, but not for Verbal IQ. Impairments in fluid functions primarily affected the IQ-scores. Memory was not impaired. Epilepsy factors explained 7% of the variance in deterioration, whereas 38% was explained by relatively low premorbid IQ and educational level, high age at seizure onset and older age. CONCLUSIONS: A subgroup of patients with localization-related epilepsy exhibits cognitive decline characterized by deterioration in PIQ and FSIQ, but with preserved higher order functions (VIQ and memory). Patients typically have epilepsia tarda, comorbid pathology, relatively low educational level and older age. These are factors known to increase the vulnerability of the brain by diminishing cognitive reserve. Cognitive deterioration may develop according to a stepwise "second-hit model", affecting and accelerating the cognitive ageing process.


Asunto(s)
Encéfalo/crecimiento & desarrollo , Cognición , Demencia/diagnóstico , Epilepsia Refractaria/diagnóstico , Adulto , Anciano , Encéfalo/fisiopatología , Demencia/epidemiología , Demencia/etiología , Epilepsia Refractaria/complicaciones , Femenino , Humanos , Masculino , Memoria , Persona de Mediana Edad , Tiempo de Reacción
10.
Seizure ; 38: 46-53, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-27131211

RESUMEN

PURPOSE: To evaluate the long-term effects of a multidisciplinary transition intervention compared to the impact of patient-related intrinsic factors on the improvement in medical and psychosocial outcome. METHODS: All patients who visited our multidisciplinary Epilepsy Transition Clinic between March 2012 and September 2014 were invited to participate (n=114). Patients were sent one questionnaire and informed consent was obtained. Questions included the patient's level of functioning on three transitional domains and a list with medical health care workers. Previously defined scores on three transitional domains and the risk profile score were re-evaluated. Past and current patient characteristics were compared using descriptive statistics. Discriminant analyses were used to determine the influence of patient-related intrinsic factors (defined as the risk factors from our previous study) and a multidisciplinary transition intervention on the improvement of medical and psychosocial outcome. RESULTS: Sixty-six out of 114 invited participants (57.9%) completed the questionnaire. Discriminant analyses showed that the patient-related intrinsic factors combined proved a strong predictor for improvement in medical outcome (72.7%) and relatively strong for educational/vocational outcome (51.5%). The transition interventions are a relative strong predictor of improvement in medical outcome (56.1%), educational/vocational outcome (53.0%) and improvement in the overall risk score (54.5%). CONCLUSION: Based on the overall improvement of psychosocial outcome in most patients, and the influence of a transition intervention on medical, educational/vocational outcome and the overall risk score, it is likely that adolescents with epilepsy benefit from visiting a multidisciplinary epilepsy transition clinic.


Asunto(s)
Epilepsia/terapia , Evaluación de Resultado en la Atención de Salud/estadística & datos numéricos , Centros de Atención Terciaria/estadística & datos numéricos , Transición a la Atención de Adultos/estadística & datos numéricos , Adolescente , Adulto , Cuidados Posteriores , Femenino , Humanos , Masculino , Evaluación del Resultado de la Atención al Paciente , Centros de Atención Terciaria/normas , Transición a la Atención de Adultos/normas , Adulto Joven
11.
J Ethnopharmacol ; 185: 235-42, 2016 Jun 05.
Artículo en Inglés | MEDLINE | ID: mdl-26994818

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: Extracts of plant species, used traditionally to treat malaria, have been extensively investigated for their activity against Plasmodium intraerythrocytic asexual parasites in search of new antimalarial drugs. However, less effort has been directed towards examining their efficacy in blocking transmission. Here, we report the results of the in vitro screening of extracts from eight selected plant species used traditionally to treat malaria in South Africa for activity against Plasmodium falciparum NF54 early and late stage gametocytes. The species used were Khaya anthotheca, Trichilia emetica, Turraea floribunda, Leonotis leonurus, Leonotis leonurus ex Hort, Olea europaea subsp. Africana, Catha edulis and Artemisia afra. AIM OF THE STUDY: To investigate the activities of extracts from plant species traditionally used for malaria treatment against P. falciparum gametocytes. MATERIAL AND METHODS: Air-dried and ground plant leaves were extracted using acetone. Primary two point in vitro phenotypic screens against both early and late stage gametocytes were done at 10 and 20µg/ml followed by full IC50 determination of the most active extracts. Inhibition of gametocyte viability in vitro was assessed using the parasite lactate dehydrogenase (pLDH) assay. RESULTS: Of the eight crude acetone extracts from plant species screened in vitro, four had good activity with over 50-70% inhibition of early and late stage gametocytes' viability at 10 and 20µg/ml, respectively. Artemisia afra (Asteraceae), Trichilia emetica (Meliaceae) and Turraea floribunda (Meliaceae) were additionally highly active against both gametocyte stages with IC50 values of less than 10µg/ml while Leonotis leonurus ex Hort (Lamiaceae) was moderately active (IC50<20µg/ml). The activity of these three highly active plant species was significantly more pronounced on late stage gametocytes compared to early stages. CONCLUSION: This study shows the potential transmission blocking activity of extracts from selected South African medicinal plants and substantiates their traditional use in malaria control that broadly encompasses prevention, treatment and transmission blocking. Further studies are needed to isolate and identify the active principles from the crude extracts of A. afra, T. emetica and T. floribunda, as well as to examine their efficacy towards blocking parasite transmission to mosquitoes.


Asunto(s)
Antimaláricos/farmacología , Supervivencia Celular/efectos de los fármacos , Medicina Tradicional , Extractos Vegetales/farmacología , Plasmodium falciparum/efectos de los fármacos , Antimaláricos/química , Evaluación Preclínica de Medicamentos , Extractos Vegetales/química , Sudáfrica
12.
Neurosci Biobehav Rev ; 65: 113-41, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-27021215

RESUMEN

Neuromodulation is a field of science, medicine, and bioengineering that encompasses implantable and non-implantable technologies for the purpose of improving quality of life and functioning of humans. Brain neuromodulation involves different neurostimulation techniques: transcranial magnetic stimulation (TMS), transcranial direct current stimulation (tDCS), vagus nerve stimulation (VNS), and deep brain stimulation (DBS), which are being used both to study their effects on cognitive brain functions and to treat neuropsychiatric disorders. The mechanisms of action of neurostimulation remain incompletely understood. Insight into the technical basis of neurostimulation might be a first step towards a more profound understanding of these mechanisms, which might lead to improved clinical outcome and therapeutic potential. This review provides an overview of the technical basis of neurostimulation focusing on the equipment, the present understanding of induced electric fields, and the stimulation protocols. The review is written from a technical perspective aimed at supporting the use of neurostimulation in clinical practice.


Asunto(s)
Terapia por Estimulación Eléctrica , Humanos , Calidad de Vida
13.
Neurosci Biobehav Rev ; 64: 1-11, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26900650

RESUMEN

A long-standing concern has been whether epilepsy contributes to cognitive decline or so-called 'epileptic dementia'. Although global cognitive decline is generally reported in the context of chronic refractory epilepsy, it is largely unknown what percentage of patients is at risk for decline. This review is focused on the identification of risk factors and characterization of aberrant cognitive trajectories in epilepsy. Evidence is found that the cognitive trajectory of patients with epilepsy over time differs from processes of cognitive ageing in healthy people, especially in adulthood-onset epilepsy. Cognitive deterioration in these patients seems to develop in a 'second hit model' and occurs when epilepsy hits on a brain that is already vulnerable or vice versa when comorbid problems develop in a person with epilepsy. Processes of ageing may be accelerated due to loss of brain plasticity and cognitive reserve capacity for which we coin the term 'accelerated cognitive ageing'. We believe that the concept of accelerated cognitive ageing can be helpful in providing a framework understanding global cognitive deterioration in epilepsy.


Asunto(s)
Envejecimiento Cognitivo , Epilepsia/psicología , Encéfalo/efectos de los fármacos , Encéfalo/fisiopatología , Envejecimiento Cognitivo/fisiología , Epilepsia/tratamiento farmacológico , Epilepsia/fisiopatología , Humanos
14.
Eur J Paediatr Neurol ; 20(3): 385-92, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26818400

RESUMEN

INTRODUCTION: The main goal of the transition clinic is to explore and optimize medical issues during transition from adolescence to adulthood, and to ease the transition into adult care. However, only limited data on the process and outcomes of transitional care in clinical practice are available. OBJECTIVE: To describe the process and outcomes of an Epilepsy Transition Clinic in a tertiary referral center in The Netherlands. METHODS: Data were collected from patients with epilepsy (aged 15-25 years), who visited the transition clinic between March 2012 and September 2014. RESULTS: The Epilepsy Transition Clinic is staffed with a multidisciplinary team including a neurologist/epileptologist, clinical neuropsychologist, a social worker and an educationalist/occupational counselor, all with knowledge of paediatric and adult medical and developmental issues. In total, 117 patients with epilepsy were included in the analysis. After consultation, 89 patients received a diagnostic work-up (76.1%), change in AED prescription (n = 64, 54.7%), or consultation/tailored advice (n = 73, 62.4%). In fourteen patients (12.0%) the epilepsy diagnosis was changed. Nineteen patients (16.2%) had complete epilepsy remission for over one year. Forty-three patients (36.8%) were referred to adult care. CONCLUSION: This study describes a multidisciplinary epilepsy transition clinic staffed by a neurologist/epileptologist, neuropsychologist, a social worker and an educationalist/occupational counselor. Diagnostic work-up and evaluation of psychosocial and educational/vocational status during adolescence are strongly recommended.


Asunto(s)
Epilepsia/diagnóstico , Epilepsia/terapia , Hospitales Especializados/normas , Transición a la Atención de Adultos/normas , Adolescente , Adulto , Femenino , Humanos , Masculino , Países Bajos , Adulto Joven
15.
Oncogene ; 35(16): 2098-111, 2016 Apr 21.
Artículo en Inglés | MEDLINE | ID: mdl-26212012

RESUMEN

Invasion and metastasis are controlled by the invadopodia, which delivers matrix-degrading enzymes to the invasion interface permitting cancer cell penetration and spread into healthy tissue. We have identified a novel pathway that directs Lyn/Src family tyrosine kinase signals to the invadopodia to regulate sarcoma cell invasion via the molecule AFAP-1-like-1 (AFAP1L1), a new member of the AFAP (actin filament-associated protein) family. We show that AFAP1L1 can transform cells, promote migration and co-expression with active Lyn profoundly influences cell morphology and movement. AFAP1L1 intersects several invadopodia pathway components through its multiple domains and motifs, including the following (i) pleckstrin homology domains that bind phospholipids generated at the plasma membrane by phosphoinositide 3-kinase, (ii) a direct filamentous-actin binding domain and (iii) phospho-tyrosine motifs (pY136 and pY566) that specifically bind Vav2 and Nck2 SH2 domains, respectively. These phosphotyrosine motifs are essential for AFAP1L1-mediated cytoskeleton regulation. Through its interaction with Vav2, AFAP1L1 regulates Rac activity and downstream control of PAK1/2/3 (p21-activated kinases) phosphorylation of myosin light chain (MLC) kinase and MLC2. AFAP1L1 interaction with Nck2 recruits actin-nucleating complexes. Significantly, in osteosarcoma cell lines, knockdown of AFAP1L1 inhibits phosphorylated MLC2 recruitment to filamentous-actin structures, disrupts invadopodia formation, cell attachment, migration and invasion. These data define a novel pathway that directs Lyn/Src family tyrosine kinase signals to sarcoma cell invadopodia through specific recruitment of Vav2 and Nck2 to phosphorylated AFAP1L1, to control cell migration and invasion.


Asunto(s)
Proteínas Adaptadoras Transductoras de Señales/fisiología , Proteínas de Microfilamentos/fisiología , Invasividad Neoplásica , Metástasis de la Neoplasia , Fosfotirosina/metabolismo , Sarcoma/patología , Actinas/metabolismo , Animales , División Celular , Línea Celular Tumoral , Humanos , Ratones , Fosforilación , Sarcoma/metabolismo
16.
Epilepsy Behav ; 51: 182-90, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26291772

RESUMEN

INTRODUCTION: Childhood-onset epilepsy during the years of transition to adulthood may affect normal social, physical, and mental development, frequently leading to psychosocial and health-related problems in the long term. OBJECTIVE: This study aimed to describe the main characteristics of patients in transition and to identify risk factors for poor psychosocial outcome in adolescents and young adults with epilepsy. METHODS: Patients with epilepsy, 15-25years of age, who visited the Kempenhaeghe Epilepsy Transition Clinic from March 2012 to December 2014 were included (n=138). Predefined risk scores for medical, educational/occupational status, and independence/separation/identity were obtained, along with individual risk profile scores for poor psychosocial outcome. Multivariate linear regression analysis and discriminant analysis were used to identify variables associated with an increased risk of poor long-term psychosocial outcome. RESULTS: Demographic, epilepsy-related, and psychosocial variables associated with a high risk of poor long-term outcome were lower intelligence, higher seizure frequency, ongoing seizures, and an unsupportive and unstable family environment. Using the aforementioned factors in combination, we were able to correctly classify the majority (55.1%) of the patients regarding their risk of poor psychosocial outcome. CONCLUSION: Our analysis may allow early identification of patients at high risk of prevention, preferably at pretransition age. The combination of a chronic refractory epilepsy and an unstable family environment constitutes a higher risk of transition problems and poor outcome in adulthood. As a consequence, early interventions should be put into place to protect youth at risk of poor transition outcome.


Asunto(s)
Conducta del Adolescente/psicología , Desarrollo del Adolescente , Desarrollo Infantil , Epilepsia/epidemiología , Epilepsia/psicología , Apoyo Social , Adolescente , Adulto , Niño , Empleo/psicología , Epilepsia/diagnóstico , Relaciones Familiares/psicología , Femenino , Humanos , Masculino , Factores de Riesgo , Adulto Joven
17.
PLoS One ; 10(7): e0132950, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26208351

RESUMEN

The genus Cyclopia, an indigenous South African fynbos plant used to prepare honeybush tea, contains phytoestrogenic compounds. An extract from C. subternata, SM6Met, displays three desirable estrogenic attributes for future development of a phytoestrogenic nutraceutical, namely, ERα antagonism, ERß agonism, and also antagonism of E2-induced breast cancer cell proliferation. Activity-guided fractionation of SM6Met was used in an attempt to isolate and identify compounds conferring the desirable estrogenic profile to SM6Met. Initial liquid-liquid fractionation of SM6Met yielded a polar fraction (PF) and a non-polar fraction (NPF), with the desirable estrogenic attributes retained in the NPF. Subsequent high performance counter-current chromatography (HPCCC) fractionation of the NPF yielded three fractions (F1-F3). Interestingly, the fractions revealed separation of the previously demonstrated positive estrogenic attributes of the NPF into separate fractions, with F1 and F2 acting as ERα antagonists, only F2 inducing antagonism of E2-induced breast cancer cell proliferation and only F3 retaining robust ERß agonist activity. In terms of major polyphenols, quantitative HPLC and liquid chromatography tandem mass spectrometry (LC-MS/MS) indicated that HPCCC fractionation resulted in a divergence of polyphenolic classes, with F1 emerging as the dihydrochalcone-rich fraction and F2 as the flavanone- and benzophenone-rich fraction, while the xanthones, flavones and phenolic acids were retained in F3. F3 was re-engineered into F3R by reassembling the major polyphenols identified in the fraction. F3R could, however, not replicate the effect of F3. In conclusion, although activity-guided fractionation results suggest that retention of all the desirable estrogenic attributes of the original SM6Met in one fraction is not an attainable goal, fractionation is a useful tool to enhance specific desirable estrogenic attributes.


Asunto(s)
Fraccionamiento Químico/métodos , Fabaceae/química , Fitoestrógenos/aislamiento & purificación , Fitoestrógenos/farmacología , Proliferación Celular/efectos de los fármacos , Cromatografía Líquida de Alta Presión , Cromatografía Liquida , Suplementos Dietéticos , Evaluación Preclínica de Medicamentos , Estradiol/farmacología , Receptor alfa de Estrógeno/antagonistas & inhibidores , Receptor beta de Estrógeno/agonistas , Células HEK293 , Humanos , Células MCF-7 , Extractos Vegetales/aislamiento & purificación , Extractos Vegetales/farmacología , Espectrometría de Masas en Tándem
18.
Seizure ; 29: 114-8, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-26076853

RESUMEN

PURPOSE: In newly diagnosed patients with Dravet syndrome sodium channel blockers are usually avoided. However, in many adult patients the diagnosis was made long after the initiation of therapy. The purpose of our study was to acquire information concerning the potential risks and benefits of (ox)carba(ma)zepine withdrawal in adult patients with genetically confirmed Dravet syndrome. METHOD: We identified 16 adults with Dravet syndrome, living in a tertiary care facility for people with epilepsy and an intellectual disability. We reviewed clinical history, genetic findings, the type and duration of sodium channels blockers that were used, seizure types and frequency, and the effect of a change in these medications. RESULTS: The study population consisted of 9 men and 7 women. Median age was 35 years (range 20-61 years). An attempt to withdraw carbamazepine (CBZ) was made in 9 patients. In 3 of these patients an increase in tonic-clonic seizures was observed. An attempt to withdraw oxcarbazepine (OXC) was made in 3 patients, leading to a complete stop in 2 patients. 3 of the 4 deaths in the withdrawal-group were related to epilepsy. CONCLUSION: In adult patients with Dravet syndrome withdrawal of CBZ or OXC is not without risks. We suggest that (ox)carba(ma)zepine withdrawal should be considered in these patients but only if there is a good reason to do so and only if they are closely monitored.


Asunto(s)
Anticonvulsivantes/uso terapéutico , Carbamazepina/análogos & derivados , Carbamazepina/uso terapéutico , Epilepsias Mioclónicas/tratamiento farmacológico , Síndrome de Abstinencia a Sustancias , Bloqueadores del Canal de Sodio Activado por Voltaje/uso terapéutico , Adulto , Anticonvulsivantes/efectos adversos , Carbamazepina/efectos adversos , Epilepsias Mioclónicas/genética , Epilepsias Mioclónicas/mortalidad , Femenino , Humanos , Pacientes Internos , Masculino , Persona de Mediana Edad , Canal de Sodio Activado por Voltaje NAV1.1/genética , Oxcarbazepina , Estudios Retrospectivos , Convulsiones/tratamiento farmacológico , Convulsiones/genética , Convulsiones/mortalidad , Centros de Atención Terciaria , Bloqueadores del Canal de Sodio Activado por Voltaje/efectos adversos , Adulto Joven
19.
Int J Sports Med ; 36(7): 567-72, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25781871

RESUMEN

This study aimed to explore the effects of "touch-rugby" training on the cardiovascular autonomic control in sedentary subjects. 22 adults (30-64 years old) were included in this study. Before (pre-test) and after (post-test) the period of training, cardio-respiratory recordings were achieved at rest and during a graded maximal exercise on a treadmill. The Smoothed-Pseudo-Wigner-Ville Distribution provided instantaneous time frequency components of RR intervals and systolic blood pressure variability in low- and high-frequency bands. The baroreflex sensitivity was assessed in low-frequency and high-frequency bands. Between pre-test and post-test, resting heart rate (74±10 vs. 69±12 beats.min(-1), p<0.05) and systolic blood pressure (118±19 vs. 103±22 mm Hg, p<0.01) decreased. Root mean square of successive differences (34.6±30.1 vs. 47.6±34.8 ms, p<0.001), high-frequency RR variability (590±288 vs. 1262±767 ms², p<0.001) increased whereas low-frequency/high-frequency ratio decreased (3.5±3.4 vs. 1.5±0.9, p<0.05). The high-frequency baroreflex sensitivity increased (13.4±10.1 vs. 26.0±20.9 ms.mmHg(-1), p<0.05). Playing touch rugby with one session weekly over 3 months modified the cardiovascular autonomic control of sedentary subjects. A decrease in the sympathetic tone combined with both an increase in the vagal tone and a decrease in systolic blood pressure at rest were observed. Therefore, such training appears to be beneficial to cardiac health.


Asunto(s)
Sistema Nervioso Autónomo/fisiología , Presión Sanguínea/fisiología , Ejercicio Físico/fisiología , Fútbol Americano/fisiología , Adulto , Barorreflejo/fisiología , Femenino , Frecuencia Cardíaca/fisiología , Humanos , Masculino , Persona de Mediana Edad , Descanso/fisiología
20.
Epilepsy Behav ; 44: 127-35, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25679495

RESUMEN

INTRODUCTION: During transition to adult medical care, the adolescent with epilepsy is especially prone to emotional, mental, physical, and social developmental difficulties, leading to stigma and poor psychosocial and socioeconomic outcome in the long term. OBJECTIVES: The aim of this review is twofold: to describe the psychosocial and medical transition from adolescence to adulthood and to evaluate the most effective model for transitional services in adolescents with epilepsy. METHODS: We searched PubMed for quantitative and qualitative data about transition from adolescence to adulthood in patients with epilepsy. RESULTS: A total of 49 articles were retrieved. We reviewed personal, psychosocial, and medical issues during transition and their long-term individual and societal consequences. Identifying risk factors for poor transition can lead to appropriate interventions for patients and their family. Although the concept of multidisciplinary transition care for adolescents with epilepsy is widely recognized, only a few transition clinics have been established. There is lack of evidence for their quality and cost-effectiveness. CONCLUSION: In addition to medical problems, more attention should be paid to the risk of psychosocial problems during transition from pediatric to adult care. The implementation of transition care for adolescents with epilepsy is considered beneficial; however, its effectiveness should be further investigated.


Asunto(s)
Epilepsia/terapia , Transición a la Atención de Adultos , Adaptación Psicológica , Adolescente , Adulto , Niño , Análisis Costo-Beneficio , Epilepsia/psicología , Femenino , Accesibilidad a los Servicios de Salud , Humanos , Masculino , Planificación de Atención al Paciente , Pediatría
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA