Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 9 de 9
Mais filtros

Base de dados
Intervalo de ano de publicação
Transl Neurosci ; 10: 233-234, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31497319


Timely dissemination of results from clinical studies is crucial for the advancement of knowledge and clinical decision making. A large body of research has shown that up to half of clinical trials do not publish their findings. In this study, we sought to determine whether clinical trial publication rates within neurology have increased over time. Focusing on neurology clinical trials completed between 2008 to 2014, we found that while the overall percentage of published trials has not changed (remaining at approximately 50%), time to publication has significantly decreased. Our findings suggest that clinical trials within neurology are being published in a more timely manner.

JAMA Neurol ; 75(12): 1573-1574, 2018 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-30383098

Neurologia , Humanos
Neurocrit Care ; 27(3): 326-333, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28685394


BACKGROUND AND PURPOSE: As survival rates have increased for intracerebral hemorrhage (ICH) patients, there is limited information regarding recovery beyond 3-6 months. This study was conducted to examine recovery curves using the modified Rankin Scale (mRS) and Barthel Index (BI) up to 12 months post-injury. METHODS: We prospectively enrolled 173 patients admitted with ICH who were subsequently evaluated using the mRS and BI at discharge as well as 3, 6, and 12 months. Repeated measures nonparametric testing was conducted to assess functional trajectories across time. RESULTS: The mRS scores showed significant improvement between discharge (median 4) and 3 (median 4), 6 (median 4), and 12 months (median 3) (p values <0.001). However, the mRS scores did not differ between follow-up time-points (i.e., 3-6, 6-12 months). There was significant improvement in scores using the BI (p values <0.001), showing improvement between discharge (mean 43.0) and 3 (mean 73.0), 6 (mean 78.2), and 12 months (mean 83.4). Additionally, there were differences in the BI between 3 and 12 months (p = 0.013), as well as between 6 and 12 months (p = 0.025). CONCLUSIONS: The BI may be a more sensitive measure of long-term recovery post-injury than the mRS, which shows minimal improvement for some survivors after 3 months. BI scores indicate survivors continually improve till 12 months post-injury. These results may have implications for the prognostication of ICH and design of clinical trial outcome measures.

Hemorragia Cerebral/diagnóstico , Índice de Gravidade de Doença , Idoso , Idoso de 80 Anos ou mais , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Sobreviventes
Neurocrit Care ; 25(3): 384-391, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27160888


BACKGROUND AND PURPOSE: Intracerebral hemorrhage (ICH) has the highest mortality rate among all strokes. While ICH location, lobar versus non-lobar, has been established as a predictor of mortality, less is known regarding the relationship between more specific ICH locations and functional outcome. This review summarizes current work studying how ICH location affects outcome, with an emphasis on how studies designate regions of interest. METHODS: A systematic search of the OVID database for relevant studies was conducted during August 2015. Studies containing an analysis of functional outcome by ICH location or laterality were included. As permitted, the effect size of individual studies was standardized within a meta-analysis. RESULTS: Thirty-seven studies met the inclusion criteria, the majority of which followed outcome at 3 months. Most studies found better outcomes on the Modified Rankin Scale (mRS) or Glasgow Outcome Score (GOS) with lobar compared to deep ICHs. While most aggregated deep structures for analysis, some studies found poorer outcomes for thalamic ICH in particular. Over half of the studies did not have specific methodological considerations for location designations, including blinding or validation. CONCLUSIONS: Multiple studies have examined motor-centric outcomes, with few studies examining quality of life (QoL) or cognition. Better functional outcomes have been suggested for lobar versus non-lobar ICH; few studies attempted finer topographic comparisons. This study highlights the need for improved reporting in ICH outcomes research, including a detailed description of hemorrhage location, reporting of the full range of functional outcome scales, and inclusion of cognitive and QoL outcomes.

Hemorragia Cerebral/patologia , /estatística & dados numéricos , Hemorragia Cerebral/terapia , Humanos
Neurocrit Care ; 24(3): 381-8, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-26341364


BACKGROUND AND PURPOSE: Cerebral edema is associated with poor outcome after IV thrombolysis. We recently described the TURN score (Thrombolysis risk Using mRS and NIHSS), a predictor of severe outcome after IV thrombolysis. Our purpose was to evaluate its ability to predict 24-h cerebral edema. METHODS: We retrospectively analyzed data from 303 patients who received IV rt-PA during the NINDS rt-PA trial. Measures of brain swelling included edema, mass effect and midline shift assessed at baseline, at 24 h and new onset at 24 h. Outcome was assessed using intracerebral hemorrhage (ICH), symptomatic intracerebral hemorrhage (sICH), 90-day severe outcome, and 90-day mortality. Statistical associations were assessed by logistic regression reporting odds ratios (OR) and by areas under the receiver operating characteristic curves (AUROC). RESULTS: Baseline brain swelling did not predict poor outcome; however, 24-h brain swelling predicted ICH (OR 5.69, P < 0.001), sICH (OR 9.50, P = 0.01), 90-day severe outcome (OR 7.10, P < 0.001), and 90-day mortality (OR 5.65, P = 0.01). Similar results were seen for new brain swelling at 24 h. TURN predicted 24-hour brain swelling (OR 2.5, P < 0.001; AUROC 0.69, 95 % CI 0.63-0.75) and new brain swelling at 24 h (OR 2.1, P < 0.001; AUROC 0.67, 95 % CI 0.61-0.73). CONCLUSIONS: Cerebral edema at 24 h is associated with poor outcome and 90-day mortality. TURN predicts ischemic stroke patients who will develop 24-h cerebral edema after IV thrombolysis.

Edema Encefálico/diagnóstico , Isquemia Encefálica/tratamento farmacológico , Hemorragia Cerebral/diagnóstico , Fibrinolíticos/uso terapêutico , Índice de Gravidade de Doença , Acidente Vascular Cerebral/tratamento farmacológico , Ativador de Plasminogênio Tecidual/uso terapêutico , Edema Encefálico/mortalidade , Isquemia Encefálica/mortalidade , Hemorragia Cerebral/mortalidade , Método Duplo-Cego , Seguimentos , Humanos , Prognóstico , Estudos Retrospectivos , Acidente Vascular Cerebral/mortalidade , Fatores de Tempo
J Exp Biol ; 218(Pt 18): 2905-17, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26206359


Many neuropeptides are members of peptide families, with multiple structurally similar isoforms frequently found even within a single species. This raises the question of whether the individual peptides serve common or distinct functions. In the accompanying paper, we found high isoform specificity in the responses of the lobster (Homarus americanus) cardiac neuromuscular system to members of the pyrokinin peptide family: only one of five crustacean isoforms showed any bioactivity in the cardiac system. Because previous studies in other species had found little isoform specificity in pyrokinin actions, we examined the effects of the same five crustacean pyrokinins on the lobster stomatogastric nervous system (STNS). In contrast to our findings in the cardiac system, the effects of the five pyrokinin isoforms on the STNS were indistinguishable: they all activated or enhanced the gastric mill motor pattern, but did not alter the pyloric pattern. These results, in combination with those from the cardiac ganglion, suggest that members of a peptide family in the same species can be both isoform specific and highly promiscuous in their modulatory capacity. The mechanisms that underlie these differences in specificity have not yet been elucidated; one possible explanation, which has yet to be tested, is the presence and differential distribution of multiple receptors for members of this peptide family.

Nephropidae/efeitos dos fármacos , Sistema Nervoso/efeitos dos fármacos , Neuropeptídeos/farmacologia , Isoformas de Proteínas , Animais , Sistema Digestório/efeitos dos fármacos , Sistema Digestório/inervação , Gânglios dos Invertebrados/efeitos dos fármacos , Gânglios dos Invertebrados/fisiologia , Contração Muscular/efeitos dos fármacos , Nephropidae/fisiologia , Isoformas de Proteínas/farmacologia
J Exp Biol ; 218(Pt 18): 2892-904, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26206360


Although the crustacean heart is modulated by a large number of peptides and amines, few of these molecules have been localized to the cardiac ganglion itself; most appear to reach the cardiac ganglion only by hormonal routes. Immunohistochemistry in the American lobster Homarus americanus indicates that pyrokinins are present not only in neuroendocrine organs (pericardial organ and sinus gland), but also in the cardiac ganglion itself, where pyrokinin-positive terminals were found in the pacemaker cell region, as well as surrounding the motor neurons. Surprisingly, the single pyrokinin peptide identified from H. americanus, FSPRLamide, which consists solely of the conserved FXPRLamide residues that characterize pyrokinins, did not alter the activity of the cardiac neuromuscular system. However, a pyrokinin from the shrimp Litopenaeus vannamei [ADFAFNPRLamide, also known as Penaeus vannamei pyrokinin 2 (PevPK2)] increased both the frequency and amplitude of heart contractions when perfused through the isolated whole heart. None of the other crustacean pyrokinins tested (another from L. vannamei and two from the crab Cancer borealis) had any effect on the lobster heart. Similarly, altering the PevPK2 sequence either by truncation or by the substitution of single amino acids resulted in much lower or no activity in all cases; only the conservative substitution of serine for alanine at position 1 resulted in any activity on the heart. Thus, in contrast to other systems (cockroach and crab) in which all tested pyrokinins elicit similar bioactivities, activation of the pyrokinin receptor in the lobster heart appears to be highly isoform specific.

Coração/efeitos dos fármacos , Contração Miocárdica/efeitos dos fármacos , Nephropidae/fisiologia , Neuropeptídeos/farmacologia , Sequência de Aminoácidos , Animais , Gânglios dos Invertebrados/fisiologia , Coração/inervação , Neuropeptídeos/fisiologia , Isoformas de Proteínas/farmacologia , Isoformas de Proteínas/fisiologia
Dev Sci ; 17(6): 1029-41, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24909389


Across species, kin bond together to promote survival. We sought to understand the dyadic effect of exclusion by kin (as opposed to non-kin strangers) on brain activity of the mother and her child and their subjective distress. To this end, we probed mother-child relationships with a computerized ball-toss game Cyberball. When excluded by one another, rather than by a stranger, both mothers and children exhibited a significantly pronounced frontal P2. Moreover, upon kin rejection versus stranger rejection, both mothers and children showed incremented left frontal positive slow waves for rejection events. Children reported more distress upon exclusion than their own mothers. Similar to past work, relatively augmented negative frontal slow wave activity predicted greater self-reported ostracism distress. This effect, generalized to the P2, was limited to mother- or child-rejection by kin, with comparable magnitude of effect across kin identity (mothers vs. children). For both mothers and children, the frontal P2 peak was significantly pronounced for kin rejection versus stranger rejection. Taken together, our results document the rapid categorization of social signals as kin relevant and the specificity of early and late neural markers for predicting felt ostracism.

Mapeamento Encefálico , Ondas Encefálicas/fisiologia , Encéfalo/fisiologia , Distância Social , Criança , Eletroencefalografia , Emoções , Feminino , Humanos , Masculino , Relações Mãe-Filho , Jogos de Vídeo