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- Ensaio Clínico NCT04026958
Mecanismos da claritromicina nas síndromes de hipersonia
Melhorias na Vigilância Mediadas por Antibióticos: Mecanismos de Ação da Claritromicina nas Síndromes de Hipersonia
Visão geral do estudo
Status
Intervenção / Tratamento
Descrição detalhada
A sonolência diurna excessiva e a longa duração do sono são características comuns de muitos distúrbios neurológicos, incluindo distrofia miotônica, doença de Parkinson e síndromes de hipersonia do sistema nervoso central. Essas últimas síndromes são um grupo de distúrbios com fenótipos clínicos sobrepostos e, exceto no caso de narcolepsia devido à deficiência de hipocretina (narcolepsia tipo 1), fisiopatologia potencialmente compartilhada.
A sonolência diurna patológica nesses distúrbios prejudica o desempenho ocupacional, limita a qualidade de vida e mais do que duplica o risco de acidentes com veículos motorizados e outros. Como a causa subjacente da maioria dessas síndromes de hipersonia não é conhecida, os tratamentos visam aumentar a sinalização monoaminérgica envolvida na promoção da vigília. No entanto, pelo menos um quarto dos pacientes com síndromes de hipersonia não consegue obter um controle satisfatório dos sintomas com esses tratamentos e, muitas vezes, são necessárias incapacidades ou licenças médicas. Há uma clara necessidade de novos tratamentos para a sonolência diurna excessiva para resolver essa falha do padrão atual de atendimento.
Em estudos anteriores, a claritromicina resultou em melhorias significativas e clinicamente significativas na gravidade da sonolência, limitações relacionadas à sonolência em atividades prolongadas da vida diária e qualidade de vida relacionada à sonolência. Longas durações de sono e inércia do sono, ambos sintomas auxiliares de distúrbios de hipersonia que contribuem para prejuízos funcionais, também foram melhorados com claritromicina.
Hipótese: A claritromicina reduzirá a sonolência excessiva e outros sintomas de distúrbios de hipersonia, conforme medido por autorrelato e testes objetivos.
Objetivo 1: Identificar os mediadores do sistema nervoso central da capacidade da claritromicina de promover a vigília e reduzir a sonolência em pacientes com síndromes de hipersonia central.
Hipótese 1a: Alterações no líquido cefalorraquidiano (CSF) aumento da função do receptor de ácido gama-aminobutírico-A (GABA-A) in vitro será associada com melhorias na sonolência auto-relatada e medida objetivamente.
Hipótese 1b: Alterações na conectividade funcional serão associadas a melhorias na sonolência auto-relatada e medida objetivamente.
Objetivo 2: Investigar os mecanismos extraneuronais pelos quais a claritromicina pode reduzir a sonolência, incluindo alterações na inflamação sistêmica e alterações na composição da microbiota gastrointestinal, em pacientes com síndromes de hipersonia central.
Hipótese 2a: A melhora da sonolência com o uso de claritromicina estará positivamente associada a reduções na inflamação sistêmica, especialmente reduções nos níveis de fator de necrose tumoral-alfa (TNFα).
Hipótese 2b: A melhora da sonolência com o uso de claritromicina estará positivamente correlacionada com a modulação da disbiose gastrointestinal.
Tipo de estudo
Inscrição (Real)
Estágio
- Fase 2
Contactos e Locais
Locais de estudo
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Georgia
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Atlanta, Georgia, Estados Unidos, 30329
- Emory Sleep Center
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Descrição
Critério de inclusão:
- diagnóstico de hipersonia idiopática ou narcolepsia tipo 2
- idade 18-60
- livre de medicamentos que promovem a vigília, sonolentos apesar dos medicamentos atuais para promover a vigília ou dispostos a descontinuar a medicação atual para promover a vigília por pelo menos 5 meias-vidas antes das medidas basais
- livre de suplementos pré ou probióticos por pelo menos seis meses antes das medidas de linha de base
Critério de exclusão:
- outras causas potenciais de hipersonolência, incluindo apneia do sono moderada ou grave, distúrbio de movimento periódico grave dos membros com despertares, distúrbios metabólicos descontrolados, deficiência de hipocretina ou cataplexia
- contra-indicação para claritromicina
- contra-indicação a qualquer um dos procedimentos do estudo
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Dobro
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
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Experimental: Claritromicina
Os participantes neste braço do estudo receberão claritromicina por 14 dias.
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A claritromicina será dosada em 500 mg duas vezes ao dia, uma ao acordar e outra ao almoço, por 14 dias.
Outros nomes:
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Comparador de Placebo: Placebo
Os participantes neste braço do estudo receberão um placebo para combinar com a claritromicina por 14 dias.
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Um placebo para combinar com a claritromicina será administrado em 500 mg duas vezes ao dia, uma vez ao acordar e outra ao almoço, por 14 dias.
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Change in Epworth Sleepiness Scale (ESS) Score
Prazo: Day -1, Day 14
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The Epworth Sleepiness Scale asks participants to respond to 8 scenarios with how likely they are to fall asleep on a 4-point scale where 0 = "would never doze" and 3 = "high chance of dozing".
Total scores range from 0 to 24 where higher scores indicate a higher chance of falling asleep during daytime activities.
The change in ESS score is obtained by subtracting the total score at Day 14 from the baseline score.
Scores above 0 mean that the mean score at Day 14 was lower than the mean score at Baseline, indicating less sleepiness.
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Day -1, Day 14
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Change in Maintenance of Wakefulness Test (MWT) for Sleep Latency
Prazo: Day -1, Day 14
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The MWT polysomnographic procedure for sleep latency examines how well participants stay awake during several trials where participants relax in a quiet room for 40 minutes.
One study found the mean sleep latency among persons without a sleep disorder to be 35.2
minutes.
The change from baseline is calculated as baseline sleep latency minus sleep latency at Day 14, in minutes.
Positive values result when the duration of sleep latency at Day 14 is lower than at Baseline.
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Day -1, Day 14
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Change in Gamma-aminobutyric Acid Receptor A (GABA-A) Potentiation
Prazo: Day -1, Day 14
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Cerebrospinal fluid (CSF) is drawn to determine the change in levels of GABA-A potentiation between the study arms.
The difference between measured current with GABA alone and the current measured with GABA + CSF yields a measure of potentiation for each CSF sample in each condition.
The change from baseline is calculated as the baseline value minus the value at Day 14.
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Day -1, Day 14
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Change in Default Mode Network (DMN) Connectivity
Prazo: Day -2, Day 13
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The default mode network (DMN) consists of a group of highly correlated brain regions most active during quiet rest, while the task positive network (TPN) is the brain network activated for goal-directed tasks.
DMN connectivity changes with sleep states and it is increasingly implicated in the symptomatology of sleepiness.
During resting state, sleep deprived participants demonstrate reduced static connectivity with the DMN.
Changes in DMN between the Baseline 1 (Day - 2) and Day 13 visits are compared between treatment groups, particularly using quasi-periodic patterns (QPPs), which interrogate network-level connectivity on a dynamic scale.
Preservation of the temporal dimension provides more insight into how this spatiotemporal network propagates across condition and pathology.
The DMN/TPN QPP correlation is reported.
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Day -2, Day 13
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Change in Tumor Necrosis Factor - Alpha (TNF-α)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of TNF-α between the study arms.
TNF-α is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
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Day -1, Day 14
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Change in Gastrointestinal Microbiome Composition
Prazo: Day -1, Day 14
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Changes in microbiome composition, as measured by alpha diversity using the Shannon Index, via 16S ribosomal ribonucleic acid (rRNA) sequencing results are compared between study arms.
The Shannon Index measures both abundance and evenness of microbial species, values of 0 indicate that a community has only one species.
The higher the value the higher the diversity of species in a particular community.
Change from baseline is calculated by subtracting the Day 14 value from the value at Baseline.
Numbers greater than 0 indicate that the Day 14 Shannon index value is lower than at Baseline.
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Day -1, Day 14
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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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On-Treatment Sleep Duration
Prazo: Day 1 through Day 14
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Participants log when they go to bed and when they wake up in order to calculate the number of minutes spent sleeping.
The average duration of sleep across 14 days is compared between study arms.
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Day 1 through Day 14
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Change in Fatigue Severity Scale (FSS) Score
Prazo: Day -1, Day 14
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Fatigue severity is measured with the Fatigue Severity Scale (FSS).
The FSS is a 9-item instrument where responses are on a scale of 1 to 7 where 1 = "disagree" and 7 = "agree".
Total scores range from 9 to 63 where higher scores indicate greater fatigue.
The change in FSS score is obtained by subtracting the total score at Day 14 from the Baseline score.
Scores above 0 signify that the mean score at Day 14 was lower than the mean score at Baseline, indicating decreased fatigue.
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Day -1, Day 14
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Change in Multidimensional Fatigue Inventory (MFI-20) Score
Prazo: Day -1, Day 14
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The MFI-20 is a 20-item instrument assessing fatigue severity.
Responses are on a 5-point scale where 1 = "yes, that is true" and 5 = "no, that is not true".
Positively phrased items are reverse scored so that the total score ranges from 20 to 100 where higher scores indicate greater severity of fatigue.
The change in MFI-20 score is obtained by subtracting the total score at Day 14 from the Baseline score.
Scores above 0 signify that the mean score at Day 14 was lower than the mean score at Baseline, indicating decreased fatigue.
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Day -1, Day 14
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Change in Sleep Inertia Questionnaire (SIQ) Score
Prazo: Day -1, Day 14
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The SIQ is an instrument with 21 items with responses on a 5-point scale where 1 = "not at all" and 5 = "all the time".
Two additional questions relate to how much time it takes for the respondent to wake up in the morning.
Total scores range from 21 to 105 and higher scores indicate increased difficulty from tiredness.
The change in SIQ score is obtained by subtracting the total score at Day 14 from the baseline score.
Scores above 0 signify that the mean score at Day 14 was lower than the mean score at Baseline, indicating reduced difficulty awakening.
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Day -1, Day 14
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On-Treatment Sleep Inertia Likert Scale
Prazo: Day 1 through Day 14
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Sleep inertia is measured with a single item on a 10-point Likert scale asking participants how difficult it was for them to wake up in the morning, where 1 = "not difficult at all" and 10 = "very difficult".
The average scores across 14 days are compared between study arms.
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Day 1 through Day 14
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Change in Interleukin 1 Alpha (IL-1α)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-1α between the study arms.
IL-1α is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-1α is obtained by subtracting the IL-1α level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interleukin 1 Beta (IL-1β)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-1β between the study arms.
IL-1β is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-1β is obtained by subtracting the IL-1β level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interleukin 2 (IL-2)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-2 between the study arms.
IL-2 is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-2 is obtained by subtracting the IL-2 level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interleukin 6 (IL-6)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-6 between the study arms.
IL-6 is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-6 is obtained by subtracting the IL-6 level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interleukin (IL-8)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-8 between the study arms.
IL-8 is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-8 is obtained by subtracting the IL-8 level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interleukin (IL-15)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-15 between the study arms.
IL-15 is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-15 is obtained by subtracting the IL-15 level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interleukin (IL-18)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of IL-18 between the study arms.
IL-18 is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in IL-18 is obtained by subtracting the IL-18 level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Tumor Necrosis Factor Beta (TNF-β)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of TNF-β between the study arms.
TNF-β is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in TNF-β is obtained by subtracting the TNF-β level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Interferon Alpha (INF-α2a)
Prazo: Day -1, Day 14
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Blood samples are used to determine the change in levels of INF-α2a between the study arms.
INF-α2a is a soporific cytokine and a reduction in soporific cytokines is hypothesized to reduce daytime sleepiness.
The change in INF-α2a is obtained by subtracting the INF-α2a level at Day 14 from the Baseline level.
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Day -1, Day 14
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Change in Functional Outcomes of Sleep Questionnaire (FOSQ) Score
Prazo: Day -1, Day 14
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The FOSQ is a 30-item instrument assessing how sleepiness impacts daily activities.
There are five subscales assessing General Productivity, Activity Level, Vigilance, Social Outcomes, and Intimate and Sexual Relationships.
Items are scored on a 4-point scale where 1 = extreme difficulty and 4 = no difficulty.
Subscale scores are obtained by calculating the mean score for the items in that subscale and each can range from 1 to 4, where higher scores indicate less difficulty due to sleepiness.
A total score is obtained by calculating the means of the subscale scores and multiplying that by the number of subscales with a score.
The total score ranges from 5 to 20 and higher scores indicate less difficulty from sleepiness.
The change in FOSQ score is obtained by subtracting the total score at Day 14 from the Baseline score.
Scores below 0 signify that the mean score at Day 14 was higher than the mean score at Baseline, indicating reduced difficulty from sleepiness.
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Day -1, Day 14
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Change in Hypersomnia Severity Index (HSI)
Prazo: Day -1, Day 14
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The HSI is a 9-item instrument assessing the severity of excessive sleepiness (hypersomnolence).
Items are scored on a Likert scale where 0 = not at all and 4 = very much.
Total scores range from 0 to 36 and higher scores indicate greater severity of symptoms of hypersomnia.
The change from baseline is calculated as the baseline score minus the score at Day 14.
The change in HSI score is obtained by subtracting the total score at Day 14 from the baseline score.
Scores above 0 signify that the mean score at Day 14 was lower than the mean score at Baseline, indicating reduced severity of hypersomnia symptoms.
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Day -1, Day 14
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Change in MRI Functional Connectivity
Prazo: Day -2, Day 13
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For functional connectivity analyses, each functional scan is parceled into the 246 regions of interest (ROIs), spanning Yeo's 7 networks contained in the Brainnetome Atlas and mean timecourse is calculated for each group.
Pearson correlations between each pair of ROIs are calculated, to determine the strength of functional connectivity between each pair of regions and inter/intra-network.
This yields a functional connectivity matrix for each functional scan (at both a subject- and group-level).
These correlation matrices are Fischer z-transformed and averaged across each condition to create a mean functional connectivity matrix for each condition.
Here, the average default mode network (DMN) connectivity is reported.
Z-scores have a mean of 0 and scores higher than 0 indicate increased functional connectivity.
The change from Baseline is calculated by subtracting the Day 13 score from the score at Day -2.
Values lower than 0 mean that the Day 13 score was higher than at baseline.
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Day -2, Day 13
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Change in MRI Task Performance - N-Back Accuracy
Prazo: Day -2, Day 13
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Participants complete a working memory task during functional magnetic resonance imaging (fMRI).
The change in task performance is measured as accuracy during 3 different levels of back tasks (0-back, 1-back, and 2-back), from baseline to on-treatment (Day 13).
The 0-back test has participants respond to a prespecified stimulus and is a control condition.
The 1-back involves remembering and responding to a prior stimulus, while a stimulus two trials earlier is responded to with the 2-back.
The change in the percentage of correct responses is obtained by subtracting the percentage at Day 14 from the Baseline percentage.
Values below 0 signify that the mean percent accuracy at Day 14 was higher than the mean percent accuracy at Baseline, indicating increased accuracy.
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Day -2, Day 13
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Change in MRI Task Performance - N-Back Reaction Time
Prazo: Day -2, Day 13
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Participants complete a working memory task during functional magnetic resonance imaging (fMRI).
he change in task performance is measured as reaction time during 3 different levels of back tasks (0-back, 1-back, and 2-back), from baseline to on-treatment (Day 13).
The 0-back test has participants respond to a prespecified stimulus and is a control condition.
The 1-back involves remembering and responding to a prior stimulus, while a stimulus two trials earlier is responded to with the 2-back.
The change in the reaction time of responses is obtained by subtracting the time at Day 14 from the Baseline time.
Scores above 0 signify that the mean time at Day 14 was lower than the mean time at Baseline, indicating faster reaction time.
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Day -2, Day 13
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Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Lynn Marie Trotti, MD, MSc, Emory University
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- IRB00108681
- 1R01NS111280 (Concessão/Contrato do NIH dos EUA)
- 2025P011204 (Outro identificador: Emory IRB)
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
Descrição do plano IPD
Prazo de Compartilhamento de IPD
Critérios de acesso de compartilhamento IPD
Tipo de informação de suporte de compartilhamento de IPD
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