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COVID-19 , Varicela , Herpes Zoster , Criança , Humanos , Pandemias , Estudos RetrospectivosRESUMO
Wilson's disease is an autosomal recessive disorder of copper metabolism and is caused by a genetic defect on chromosome 13. Nuclear medicine methods can prove the metabolic defect and contribute to the assessment of central neurological deficits.With high specificity and sensitivity, the intravenous radiocopper test enables the diagnosis to be confirmed as the basis for initiating treatment. The oral radiocopper test is used to monitor zinc treatment.[123I]ß-CIT-SPECT and [123I]IBZM-SPECT provide functional information of the nigrostriatal system.[123I]ß-CIT-SPECT also allows the determination of SERT availability in the hypothalamus/brain stem as a surrogate parameter of depression.Metabolic parameters of the cortex, basal ganglia and cerebellum can be assessed by [18F]FDG-PET studies.SPECT and [18F]FDG-PET studies show significant differences between neurological and non-neurological Wilson patients. Overall, only noninvasive in vivo nuclear medicine enables a deeper insight into the pathophysiology of neurological processes in Wilson's disease.
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Degeneração Hepatolenticular , Medicina Nuclear , Humanos , Degeneração Hepatolenticular/diagnóstico por imagem , Degeneração Hepatolenticular/genética , Fluordesoxiglucose F18RESUMO
BACKGROUND: Eye movement abnormalities (EMA) are common in multiple sclerosis (MS). However, type and severity according to the MS stage are poorly known, especially in Radiologically Isolated Syndrome (RIS) and in Clinically Isolated Syndrome (CIS). Although MRI has been included in the MS diagnostic criteria, there may be clinical-radiological dissociation. OBJECTIVE: To analyze by video-oculography (VOG) prevalence of EMA in different MS phenotypes and study correlations with brain and cervical cord MRI T2 lesions location. METHODS: 76 participants were prospectively recruited (12 RIS, 10 CIS, 11 relapsing-remitting-MS, 10 secondary progressive-MS, 10 primary progressive MS and 23 gender and age-matched healthy controls). We analyzed fixations, anti-saccades, horizontal and vertical reflex saccades and smooth pursuit. RESULTS: EMA were frequent and of gradual severity from RIS to progressive forms. Internuclear ophthalmoplegia (INO) and centripetal hypermetria were strong arguments for the diagnosis of a demyelinating disorder versus a control population. Some EMA were linked to infratentorial T2 lesion location, but others like INO were not. CONCLUSION: This study confirm that EMA are common in all MS phenotypes, even at the earliest stages. VOG can be useful to detect demyelinating process at preclinical stage by highlighting subclinical EMA even in absence of characteristic lesions visible on MRI.
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Encéfalo/diagnóstico por imagem , Medula Cervical/diagnóstico por imagem , Medições dos Movimentos Oculares , Esclerose Múltipla/diagnóstico , Transtornos da Motilidade Ocular/diagnóstico , Adulto , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Esclerose Múltipla/diagnóstico por imagem , Esclerose Múltipla/etiologia , Transtornos da Motilidade Ocular/complicações , Gravação em VídeoRESUMO
BACKGROUND: Postoperative delirium is associated with an increased risk of morbidity and mortality, especially in the elderly. Delirium in the postanaesthesia care unit (PACU) could predict adverse clinical outcomes. METHODS: We investigated a potential link between intraoperative EEG patterns and PACU delirium as well as an association of PACU delirium with perioperative outcomes, readmission and length of hospital stay. The risk factors for PACU delirium were also explored. Data were collected from 626 patients receiving general anaesthesia for procedures that would not interfere with frontal EEG recording. RESULTS: Of the 626 subjects enrolled, 125 tested positive for PACU delirium. Whilst age, renal failure, and pre-existing neurological disease were associated with PACU delirium in the univariable analysis, the multivariable analysis revealed the importance of information derived from the EEG, anaesthetic technique, anaesthesia duration, and history of stroke or neurodegenerative disease. The occurrence of EEG burst suppression during maintenance [odds ratio (OR)=1.86 (1.13-3.05)] and the type of EEG emergence trajectory may be predictive of PACU delirium. Specifically, EEG emergence trajectories lacking significant spindle power were strongly associated with PACU delirium, especially in cases that involved ketamine or nitrous oxide [OR=6.51 (3.00-14.12)]. Additionally, subjects with PACU delirium were at an increased risk for readmission [OR=2.17 (1.13-4.17)] and twice as likely to stay >6 days in the hospital. CONCLUSIONS: Specific EEG patterns were associated with PACU delirium. These findings provide valuable information regarding how the brain reacts to surgery and anaesthesia that may lead to strategies to predict PACU delirium and identify key areas of investigation for its prevention.
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Período de Recuperação da Anestesia , Eletroencefalografia/métodos , Delírio do Despertar/diagnóstico , Monitorização Intraoperatória/métodos , Adulto , Idoso , Anestesia Geral/métodos , Diagnóstico Precoce , Feminino , Humanos , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Readmissão do Paciente/estatística & dados numéricos , Prognóstico , Fatores de Risco , Processamento de Sinais Assistido por ComputadorRESUMO
BACKGROUND: Despite convincing evidence for early mobilization of patients on intensive care units (ICU), implementation in practice is limited. Protocols for early mobilization, including in- and exclusion criteria, assessments, safety criteria, and step schemes may increase the rate of implementation and mobilization. HYPOTHESIS: Patients (population) on ICUs with a protocol for early mobilization (intervention), compared to patients on ICUs without protocol (control), will be more frequently mobilized (outcome). METHODS: A multicenter, stepped-wedge, cluster-randomized pilot study is presented. Five ICUs will receive an adapted, interprofessional protocol for early mobilization in randomized order. Before and after implementation, mobilization of ICU patients will be evaluated by randomized monthly one-day point prevalence surveys. Primary outcome is the percentage of patients mobilized out of bed, operationalized as a score of ≥3 on the ICU Mobility Scale. Secondary outcome parameters will be presence and/or length of mechanical ventilation, delirium, stay on ICU and in hospital, barriers to early mobilization, adverse events, and process parameters as identified barriers, used strategies, and adaptions to local conditions. EXPECTED RESULTS: Exploratory evaluation of study feasibility and estimation of effect sizes as the basis for a future explanatory study.
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Deambulação Precoce , Unidades de Terapia Intensiva , Cuidados Críticos , Humanos , Projetos Piloto , Ensaios Clínicos Controlados Aleatórios como Assunto , Respiração ArtificialRESUMO
A polymorphism in the promoter region of the human serotonin transporter (5-HTT)-coding SLC6A4 gene (5-HTTLPR) has been implicated in moderating susceptibility to stress-related psychopathology and to possess regulatory functions on human in vivo 5-HTT availability. However, data on a direct relation between 5-HTTLPR and in vivo 5-HTT availability have been inconsistent. Additional factors such as epigenetic modifications of 5-HTTLPR might contribute to this association. This is of particular interest in the context of obesity, as an association with 5-HTTLPR hypermethylation has previously been reported. Here, we tested the hypothesis that methylation rates of 14 cytosine-phosphate-guanine (CpG) 5-HTTLPR loci, in vivo central 5-HTT availability as measured with [11C]DASB positron emission tomography (PET) and body mass index (BMI) are related in a group of 30 obese (age: 36±10 years, BMI>35 kg/m2) and 14 normal-weight controls (age 36±7 years, BMI<25 kg/m2). No significant association between 5-HTTLPR methylation and BMI overall was found. However, site-specific elevations in 5-HTTLPR methylation rates were significantly associated with lower 5-HTT availability in regions of the prefrontal cortex (PFC) specifically within the obese group when analyzed in isolation. This association was independent of functional 5-HTTLPR allelic variation. In addition, negative correlative data showed that CpG10-associated 5-HTT availability determines levels of reward sensitivity in obesity. Together, our findings suggest that epigenetic mechanisms rather than 5-HTTLPR alone influence in vivo 5-HTT availability, predominantly in regions having a critical role in reward processing, and this might have an impact on the progression of the obese phenotype.
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Metilação de DNA , Obesidade/genética , Córtex Pré-Frontal/metabolismo , Recompensa , Proteínas da Membrana Plasmática de Transporte de Serotonina/genética , Adulto , Epigênese Genética , Feminino , Humanos , Masculino , Polimorfismo Genético , Regiões Promotoras Genéticas , Proteínas da Membrana Plasmática de Transporte de Serotonina/metabolismoRESUMO
The relationship between food-intake related behaviours measured by the Three-Factor Eating Questionnaire (TFEQ) and in vivo norepinephrine transporter (NET) availability has not been explored yet. We investigated ten obese individuals (body mass index (BMI) 42.4 ± 3.7 kg/m2) and ten normal-weight healthy controls (HC, BMI 23.9 ± 2.5 kg/m2) with (S,S)-[11C]-O-methylreboxetine ([11C]MRB) positron emission tomography (PET). All participants completed the TFEQ, which measures cognitive restraint, disinhibition and hunger. Image analysis required magnetic resonance imaging data sets onto which volumes-of-interests were drawn. Tissue time activity curves (TACs) were obtained from the dynamic PET data followed by kinetic modeling of these regional brain TACs applying the multilinear reference tissue model (2 parameters) with the occipital cortex as reference region. Obese individuals scored significantly higher on the hunger subscale of the TFEQ. Correlative data analysis showed that a higher degree of hunger correlated negatively with the NET availability of the insular cortex in both obese individuals and HC; however, this finding was more pronounced in obesity. Further, for obese individuals, a negative correlation between disinhibition and NET BPND of the locus coeruleus was detected. In conclusion, these initial data provide in vivo imaging support for the involvement of the central NE system in maladaptive eating behaviors such as susceptibility to hunger.
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Dieta Redutora , Fome , Inibição Psicológica , Modelos Neurológicos , Modelos Psicológicos , Proteínas da Membrana Plasmática de Transporte de Norepinefrina/metabolismo , Obesidade Mórbida/dietoterapia , Adulto , Índice de Massa Corporal , Radioisótopos de Carbono , Córtex Cerebral/diagnóstico por imagem , Córtex Cerebral/metabolismo , Cognição , Estudos de Coortes , Dieta Redutora/efeitos adversos , Dieta Redutora/psicologia , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Morfolinas , Proteínas do Tecido Nervoso/metabolismo , Neuroimagem , Obesidade Mórbida/diagnóstico por imagem , Obesidade Mórbida/metabolismo , Obesidade Mórbida/psicologia , Cooperação do Paciente/psicologia , Projetos Piloto , Tomografia por Emissão de Pósitrons , Reboxetina , AutorrelatoRESUMO
Maternal immune activation (MIA) during pregnancy has been linked to an increased risk of developing psychiatric pathologies in later life. This link may be bridged by a defective microglial phenotype in the offspring induced by MIA, as microglia have key roles in the development and maintenance of neuronal signaling in the central nervous system. The beneficial effects of the immunomodulatory treatment with minocycline on schizophrenic patients are consistent with this hypothesis. Using the MIA mouse model, we found an altered microglial transcriptome and phagocytic function in the adult offspring accompanied by behavioral abnormalities. The changes in microglial phagocytosis on a functional and transcriptional level were similar to those observed in a mouse model of Alzheimer's disease hinting to a related microglial phenotype in neurodegenerative and psychiatric disorders. Minocycline treatment of adult MIA offspring reverted completely the transcriptional, functional and behavioral deficits, highlighting the potential benefits of therapeutic targeting of microglia in psychiatric disorders.
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Filhos Adultos/psicologia , Antibacterianos/farmacologia , Fenômenos do Sistema Imunitário/efeitos dos fármacos , Microglia/efeitos dos fármacos , Minociclina/farmacologia , Transmissão Sináptica/fisiologia , Transcriptoma/genética , Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/genética , Animais , Antibacterianos/administração & dosagem , Comportamento Animal/efeitos dos fármacos , Modelos Animais de Doenças , Feminino , Humanos , Fenômenos do Sistema Imunitário/fisiologia , Camundongos , Camundongos Endogâmicos C57BL/imunologia , Microglia/metabolismo , Minociclina/administração & dosagem , Fagocitose/imunologia , Gravidez , Esquizofrenia/tratamento farmacológico , Esquizofrenia/genéticaRESUMO
BACKGROUND: Scabies has been on the rise in France in recent years and has posed therapeutic problems, mainly due to the withdrawal of benzyl benzoate. The objective of this study was to describe prescribing practices for scabies in children. METHODS: A national survey was conducted by means of a standardized questionnaire covering various clinical situations of scabies and the drugs used preferentially according to age, which was sent out between December 2014 and March 2015 to members of the clinical research group of the French Society of Paediatric Dermatology. RESULTS: Of the 38 experts contacted, 20 replied. For a typical case of scabies, 55% of the experts initially prescribed oral ivermectin for children aged 6 years, 15% prescribed ivermectin in children aged 2 years, and 5% in infants aged 3 months. Ivermectin was more widely prescribed after failure of prior treatment or recurrence of scabies, on skin lesions or impetigo, if precarious, especially for profuse hyperkeratotic scabies. A total of 35% of the experts reported no prescribing restrictions with regard to patient age or weight. Discrepancies were observed concerning the mode of administration and the time between consecutive doses. Esdepallethrin remained the preferred local treatment among the experts (38% of all topical prescriptions) except in asthmatic children, while permethrin was the least-prescribed topical agent. DISCUSSION: This study confirms the heterogeneity of our practices. Formal expert recommendations are awaited, particularly concerning the use of ivermectin in infants.
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Antiparasitários/uso terapêutico , Escabiose/tratamento farmacológico , Administração Cutânea , Administração Oral , Aletrinas/administração & dosagem , Benzoatos/administração & dosagem , Criança , Pré-Escolar , Feminino , França , Humanos , Lactente , Inseticidas/administração & dosagem , Ivermectina/uso terapêutico , Masculino , Permetrina/administração & dosagem , Escabiose/diagnóstico , Inquéritos e Questionários , Resultado do TratamentoRESUMO
OBJECTIVE: Emotional eating (EE) has been linked to norepinephrine dysfunction. Therefore, we aimed to investigate the relationship between EE and norepinephrine transporter (NET) availability. METHOD: Ten severely obese individuals (body mass index (BMI) 42.4 ± 3.7 kg/m2 ) and ten non-obese, healthy controls (BMI 23.9 ± 2.5 kg/m2 ) matched for age and sex were studied using (S,S)-[11 C]-O-methylreboxetine ([11 C]MRB) positron emission tomography (PET). Kinetic modeling of regional tissue time activity curves was performed using multilinear reference tissue model 2 (MRTM2, with the occipital cortex as a reference region) to estimate binding potential based on individual PET-MR coregistration. To test for associations of EE and NET availability, participants completed the EE subscale of the Dutch Eating Behavior Questionnaire before scanning. RESULTS: Obese individuals and non-obese, healthy controls did not significantly differ regarding EE scores and regional NET availability. For obese individuals only, correlative data analyses pointed to a sinoidal distribution pattern as a higher degree of EE related to lower NET availability in the locus coeruleus and to higher NET availability in the left thalamus. DISCUSSION: These results indicate that central in vivo NET availability is altered in EE of individuals with obesity. © 2016 Wiley Periodicals, Inc.(Int J Eat Disord 2017; 50:152-156).
Assuntos
Emoções , Transtornos da Alimentação e da Ingestão de Alimentos/psicologia , Proteínas da Membrana Plasmática de Transporte de Norepinefrina/metabolismo , Obesidade Mórbida/metabolismo , Adulto , Transtornos da Alimentação e da Ingestão de Alimentos/metabolismo , Feminino , Humanos , Locus Cerúleo/metabolismo , Masculino , Morfolinas , Projetos Piloto , Tomografia por Emissão de Pósitrons , Cintilografia , Compostos Radiofarmacêuticos , Reboxetina , Tálamo/metabolismoRESUMO
The presence of a congenital or acquired cutaneous lesion is a frequent reason for consultation in pediatric plastic surgery unit. The management of these lesions requires a good knowledge of specific diagnoses in children. This step is sometimes difficult because of the multiplicity of possible diagnosis. Some skin tumors may be the external sign of a general disease or an underlying malformation; those can change the overall prognosis and management and require to be properly identified. The decision of surgical excision depends on various criteria, including diagnosis but also the reconstruction possibilities. The timing of surgical treatment depends on the medical emergency of the tumor resection (benign tumor, spontaneously regressive tumor, risk of degeneration into malignancy), on the cosmetic and psychological impact but also on the growth or learning steps in child life. This article first provides an aid in the diagnosis of the most common or more characteristic skin tumors. The algorithm is principally based on the pigmentation aspect of the tumor. The age and conditions of the surgical management are specified for each type of tumor. Cutaneous hemangiomas and vascular malformations, and congenital cysts and fistulas are not reported in this article.
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Neoplasias Cutâneas/cirurgia , Algoritmos , Criança , Humanos , Neoplasias Cutâneas/patologiaRESUMO
BACKGROUND/OBJECTIVES: The neurobiological mechanisms linking obesity to emotional distress related to weight remain largely unknown. PARTICIPANTS/METHODS: Here we combined positron emission tomography, using the serotonin transporter (5-HTT) radiotracer [(11)C]-3-amino-4-(2-dimethylaminomethylphenylsulfanyl)-benzonitrile, with functional connectivity magnetic resonance imaging, the Beck Depression Inventory (BDI-II) and the Impact of Weight on Quality of Life-Lite questionnaire (IWQOL-Lite) to investigate the role of central serotonin in the severity of depression (BDI-II), as well as in the loss of emotional well-being with body weight (IWQOL-Lite). RESULTS: In a group of lean to morbidly obese individuals (n=28), we found sex differences in the 5-HTT availability-related connectivity of the hypothalamus. Males (n=11) presented a strengthened connectivity to the lateral orbitofrontal cortex, whereas in females (n=17) we found strengethened projections to the ventral striatum. Both regions are known as reward regions involved in mediating the emotional response to food. Their resting-state activity correlated positively to the body mass index (BMI) and IWQOL-Lite scores, suggesting that each region in both sexes also underpins a diminished sense of emotional well-being with body weight. Contrarily to males, we found that in females also the BDI-II positively correlated with the BMI and by trend with the activity in ventral striatum, suggesting that in females an increased body weight may convey to other mood dimensions than those weight-related ones included in the IWQOL-Lite. CONCLUSIONS: This study suggests sex differences in serotonin-hypothalamic connections to brain regions of the reward circuitry underpinning a diminished sense of emotional well-being with an increasing body weight.
Assuntos
Depressão/fisiopatologia , Hipotálamo/metabolismo , Obesidade Mórbida/fisiopatologia , Córtex Pré-Frontal/fisiopatologia , Serotonina/metabolismo , Caracteres Sexuais , Magreza/metabolismo , Estriado Ventral/fisiopatologia , Aumento de Peso , Adulto , Feminino , Alemanha , Humanos , Masculino , Obesidade Mórbida/metabolismo , Obesidade Mórbida/psicologia , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Córtex Pré-Frontal/diagnóstico por imagem , Córtex Pré-Frontal/metabolismo , Psicometria , Qualidade de Vida , Reprodutibilidade dos Testes , Recompensa , Proteínas da Membrana Plasmática de Transporte de Serotonina/metabolismo , Inquéritos e Questionários , Estriado Ventral/diagnóstico por imagem , Estriado Ventral/metabolismoRESUMO
BACKGROUND: Several sources suggest an escalation of scabies in France. AIM: To describe a population of patients continuing to present with scabies despite multiple treatments in order to identify factors associated with persistence of infection. PATIENTS AND METHODS: A descriptive cross-sectional study in adults and children consulting for persistent scabies despite at least one previous treatment. A standardized questionnaire explored potential sources of treatment failure. RESULTS: Thirty-one patients were analyzed. Initial symptoms were noted to have started between two and 52 weeks earlier (mean: 19 weeks). The mean number of prior consultations with a general practitioner was 3.1 (0-10) and 1.7 with a dermatologist (0-7). The mean number of patients per household was 3.5 (1-9). At least one dose of oral ivermectin (maximum of 6 doses per household) was prescribed for 84 % of patients (29 % of whom were not fasted at the time). Further, 74 % of patients received at least one local application of esdepallethrin and piperonyl butoxide (maximum: 5 courses), four received benzyl benzoate and two received permethrin; however, 58 % did not reapply the substance after hand washing. All households bought the prescribed treatments despite the costs. Close contacts of patients were treated in 58 % of households. Decontamination of bedding and clothing was carried out properly in 90 % of households. DISCUSSION: Persistence of infection appears to be linked to: (1) insufficient treatment of close contacts; (2) absence of a second treatment between days 7 and 14; (3) insufficient efficacy of the available treatments, doubtless due to multiple factors (intrinsic resistance of Sarcoptes, failure to repeat treatment, poor explanation of methods for dosing and application, and oral intake of treatments). Access to non-reimbursed treatments was not identified as a problem and decontamination of bedding and clothing was correctly performed in most cases. CONCLUSION: Though certain fundamental aspects of scabies treatment must be better known, longer consultations and provision of efficacious treatments are also a priority.
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Escabiose/tratamento farmacológico , Administração Oral , Adulto , Idoso , Aletrinas/uso terapêutico , Antiparasitários/uso terapêutico , Benzoatos/uso terapêutico , Criança , Pré-Escolar , Estudos Transversais , Descontaminação , Dermatologia/estatística & dados numéricos , Feminino , França/epidemiologia , Medicina Geral/estatística & dados numéricos , Desinfecção das Mãos , Humanos , Lactente , Ivermectina/uso terapêutico , Masculino , Pessoa de Meia-Idade , Permetrina/uso terapêutico , Escabiose/epidemiologia , Inquéritos e Questionários , Fatores de Tempo , Falha de TratamentoRESUMO
OBJECTIVES: The neurobiological mechanisms linking obesity to emotional distress remain largely undiscovered. METHODS: In this pilot study, we combined positron emission tomography, using the norepinephrine transporter (NET) tracer [(11)C]-O-methylreboxetine, with functional connectivity magnetic resonance imaging, the Beck depression inventory (BDI), and the impact of weight on quality of life-Lite questionnaire (IWQOL-Lite), to investigate the role of norepinephrine in the severity of depression (BDI), as well as in the loss of emotional well-being with body weight (IWQOL-Lite). RESULTS: In a small group of lean-to-morbidly obese individuals (n=20), we show that an increased body mass index (BMI) is related to a lowered NET availability within the hypothalamus, known as the brain's homeostatic control site. The hypothalamus displayed a strengthened connectivity in relation to the individual hypothalamic NET availability to the anterior insula/frontal operculum, as well as the medial orbitofrontal cortex, assumed to host the primary and secondary gustatory cortex, respectively (n=19). The resting-state activity in these two regions was correlated positively to the BMI and IWQOL-Lite scores, but not to the BDI, suggesting that the higher the resting-state activity in these regions, and hence the higher the BMI, the stronger the negative impact of the body weight on the individual's emotional well-being was. CONCLUSIONS: This pilot study suggests that the loss in emotional well-being with weight is embedded within the central norepinephrine network.
Assuntos
Depressão/psicologia , Emoções , Norepinefrina/metabolismo , Obesidade Mórbida/metabolismo , Obesidade Mórbida/psicologia , Aumento de Peso/fisiologia , Adulto , Índice de Massa Corporal , Feminino , Alemanha , Humanos , Hipotálamo/metabolismo , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Proteínas da Membrana Plasmática de Transporte de Norepinefrina/metabolismo , Obesidade Mórbida/fisiopatologia , Projetos Piloto , Tomografia por Emissão de Pósitrons , Psicometria , Qualidade de Vida , Compostos Radiofarmacêuticos , Reprodutibilidade dos Testes , Adulto JovemRESUMO
Continuous intrathecal Baclofen application (ITB) through an intracorporeal pump system is widely used in adults and children with spasticity of spinal and supraspinal origin. Currently, about 1200 new ITB pump systems are implanted in Germany each year. ITB is based on an interdisciplinary approach with neurologists, rehabilitation specialists, paediatricians and neurosurgeons. We are presenting the proceedings of a consensus meeting organised by IAB-Interdisciplinary Working Group for Movement Disorders. The ITB pump system consists of the implantable pump with its drug reservoir, the refill port, an additional side port and a flexible catheter. Non-programmable pumps drive the Baclofen flow by the reservoir pressure. Programmable pumps additionally contain a radiofrequency control unit, an electrical pump and a battery. They have major advantages during the dose-finding phase. ITB doses vary widely between 10 and 2000 µg/day. For spinal spasticity, they are typically in the order of 100-300 µg/day. Hereditary spastic paraplegia seems to require particularly low doses, while dystonia and brain injury require particularly high ones. Best effects are documented for tonic paraspasticity of spinal origin and the least effects for phasic muscle hyperactivity disorders of supraspinal origin. Oral antispastics are mainly effective in mild spasticity. Botulinum toxin is most effective in focal spasticity. Myotomies and denervation operations are restricted to selected cases of focal spasticity. Due to its wide-spread distribution within the cerebrospinal fluid, ITB can tackle wide-spread and severe spasticity.
Assuntos
Baclofeno/administração & dosagem , Transtornos dos Movimentos/tratamento farmacológico , Relaxantes Musculares Centrais/administração & dosagem , Espasticidade Muscular/tratamento farmacológico , Alemanha , Humanos , Bombas de Infusão Implantáveis/efeitos adversos , Injeções EspinhaisRESUMO
Brown adipose tissue (BAT) plays an important role in regulating core-body temperature in various species including man. [18F]FDG-PET/CT imaging first revealed the presence of metabolically active BAT depots and that decreased BAT function is associated with various metabolic conditions. Thyroid hormone (TH) in concert with sympathetic nervous system signalling (SNS) stimulates BAT thermogenesis and thyroid disorders result in dysfunctional BAT. Currently, research is focussing not only on BAT regulation but also on browning of white adipose tissue (WAT) to BAT beige adipose tissue (BeAT) in order to develop novel treatments for human obesity and related conditions. While [18F]FDG-PET/CT imaging is continuing to provide valuable insights into BAT and BeAT function in health and disease, there is a pressing need to develop alternative radiotracers that reliably track their activity in vivo. As a result it is expected that preclinical micro PET/CT investigations of BAT and BeAT will gain in prominence. The aim of this short review is to i) describe fundamentals in BAT biology, ii) highlight some of the clinical and preclinical studies performed on humans and rodents with a focus on TH, BAT and PET/CT, and iii) bridge these data with our own studies within the DFG thyroid transact priority program.
Assuntos
Tecido Adiposo Marrom/metabolismo , Doenças Metabólicas/metabolismo , Modelos Biológicos , Termogênese , Hormônios Tireóideos/metabolismo , Tecido Adiposo Marrom/diagnóstico por imagem , Fluordesoxiglucose F18/farmacocinética , Humanos , Doenças Metabólicas/diagnóstico por imagem , Imagem Molecular/métodos , Tomografia por Emissão de Pósitrons/métodos , Compostos Radiofarmacêuticos/farmacocinética , Tomografia Computadorizada por Raios X/métodosRESUMO
The α4ß2* nicotinic acetylcholine receptors (α4ß2*-nAChR) are highly abundant in the human brain. As neuromodulators they play an important role in cognitive functions such as memory, learning and attention as well as mood and motor function. Post mortem studies suggest that abnormalities of α4ß2*-nAChRs are closely linked to histopathological hallmarks of Alzheimer's disease (AD), such as amyloid aggregates/oligomers and tangle pathology and of Parkinson's disease (PD) such as Lewy body pathology and the nigrostriatal dopaminergic deficit. In this review we summarize and discuss nicotinic receptor imaging findings of 2-[18F]FA-85380 PET, [11C]nicotine PET and 5-[123I]IA-85380 SPECT studies investigating α4ß2*-nAChR binding in vivo and their relationship to mental dysfunction in the brain of patients with AD and patients out of the spectrum of Lewy body disorders such as PD and Lewy body dementia (DLB). Furthermore, recent developments of novel α4ß2*-nAChR-specific PET radioligands, such as (-)[18F]Flubatine or [18F]AZAN are summarized. We conclude that α4ß2*-nAChR-specific PET might become a biomarker for early diagnostics and drug developments in patients with AD, DLB and PD, even at early or prodromal stages.
Assuntos
Doença de Alzheimer/diagnóstico por imagem , Encéfalo/diagnóstico por imagem , Doença de Parkinson/diagnóstico por imagem , Tomografia por Emissão de Pósitrons/métodos , Receptores Nicotínicos/metabolismo , Tomografia Computadorizada de Emissão de Fóton Único/métodos , Benzamidas , Biomarcadores/metabolismo , Compostos Bicíclicos Heterocíclicos com Pontes , Cognição , Transtornos Cognitivos/complicações , Humanos , Transtornos do Humor/complicações , Compostos Radiofarmacêuticos , Receptores Colinérgicos/metabolismoRESUMO
PURPOSE: T-cell-located CD4 antigen represents one of the therapeutic targets in rheumatoid arthritis (RA). However, up to now there is no established imaging tool to visualize this target in vivo. The aim of our study was to assess the safety and tolerability of a technetium-99m labelled murine anti-human CD4 IgG1-Fab fragment ([(99m)Tc]-anti-CD4-Fab, [(99m)Tc]-EP1645) in patients with active synovitis due to RA, and to evaluate its potential as a marker of disease activity. METHODS: In the present phase I proof of principle study five patients with RA were examined. Planar scans of the whole body, hands, and feet were taken 30 min up to 24h after application of 550 ± 150 MBq [(99m)Tc]-anti-CD4-Fab, followed by visual analyses, comparison with clinical data in 68 joints per patient and semiquantitative analysis of hand and wrist joints. RESULTS: Neither infusion related adverse events nor adverse events during follow up were observed. No increase in human anti-murine antibody titres was seen. All patients had positive scans in almost 70% of clinically affected joints. Positive scans were also found in 8% of joints without evidence of swelling or tenderness. CONCLUSION: Scintigraphy with [(99m)Tc]-anti-CD4-Fab is a promising technique for evaluation of inflammatory activity in patients with RA, pre-therapeutical evaluation of CD4 status and therapy control. Tracer uptake in clinically inconspicuous joints strongly indicates diagnostic potential of [(99m)Tc]-anti-CD4-Fab. Whether this technique is eligible as a prognostic factor in RA needs to be analysed in further studies as well as the pathophysiological background of clinically affected joints lacking tracer uptake.
Assuntos
Anticorpos Monoclonais/imunologia , Artrite Reumatoide/diagnóstico por imagem , Antígenos CD4/imunologia , Tecnécio , Idoso , Idoso de 80 Anos ou mais , Anticorpos Monoclonais/efeitos adversos , Anticorpos Monoclonais/farmacocinética , Feminino , Humanos , Inflamação/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Cintilografia , SegurançaRESUMO
BACKGROUND: A task-specific repetitive approach in gait rehabilitation after CNS lesion is well accepted nowadays. To ease the therapists' and patients' physical effort, the past two decades have seen the introduction of gait machines to intensify the amount of gait practice. Two principles have emerged, an exoskeleton- and an endeffector-based approach. Both systems share the harness and the body weight support. With the end-effector-based devices, the patients' feet are positioned on two foot plates, whose movements simulate stance and swing phase. OBJECTIVE: This article provides an overview on the end-effector based machine's effectiveness regarding the restoration of gait. METHODS: For the electromechanical gait trainer GT I, a meta analysis identified nine controlled trials (RCT) in stroke subjects (n = 568) and were analyzed to detect differences between end-effector-based locomotion + physiotherapy and physiotherapy alone. RESULTS: Patients practising with the machine effected in a superior gait ability (210 out of 319 patients, 65.8% vs. 96 out of 249 patients, 38.6%, respectively, Z = 2.29, p = 0.020), due to a larger training intensity. Only single RCTs have been reported for other devices and etiologies. CONCLUSION: The introduction of end-effector based gait machines has opened a new succesful chapter in gait rehabilitation after CNS lesion.