Effetti cerebromicrovascolari dell'alimentazione a tempo limitato negli anziani
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Descrizione dettagliata
Tipo di studio
Tipo di studio
Iscrizione (Effettivo)
Iscrizione
Fase
Fase
- Non applicabile
Contatti e Sedi
Contatto studio
Contatto studio
- Nome: Stefano Tarantini, PhD
- Numero di telefono: 47818 (405)-271-8000
- Email: stefano-tarantini@ouhsc.edu
Backup dei contatti dello studio
- Nome: Andriy Yabluchanskiy, MD, PhD
- Numero di telefono: 47097 405-271-8000
- Email: andriy-yabluchanskiy@ouhsc.edu
Luoghi di studio
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Oklahoma
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Oklahoma City, Oklahoma, Stati Uniti, 73117
- University of Oklahoma Health Sciences Center
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Descrizione
Criterio di inclusione:
-Adulti sani di età ≥21 anni
Criteri di esclusione:
-Incapacità di leggere o scrivere in inglese
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Altro
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
|---|---|
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Sperimentale: Time restricted eating
14 h of fasting daily (10 h of free eating)
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14:10 daily fasting regimen
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Neurovascular Coupling Using Functional Near Infrared Spectroscopy (fNIRS)
Lasso di tempo: Baseline, 6 months
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Functional near infrared spectroscopy (fNIRS) will be performed during the cognitive n-back task.
fNIRS approach generates data that represent a relative change in oxygenated hemoglobin measured over the cortical brain tissues.
fNIRS data is analyzed using a pipeline based on the General Linear Model (GLM) approach created using the Brain AnalyzIR toolbox and implemented in MatLab.
At the subject level, regression coefficients (beta values) are extracted to characterize individual neurovascular coupling response in the prefrontal cortex across all n-back blocks.
It is expected that more difficult cognitive tasks will lead to increased neurovascular coupling responses in healthy individuals, but no clinically relevant ranges exist for this measure.
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Baseline, 6 months
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Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Neurovascular Coupling Using the Dynamic Retinal Vessel Analysis
Lasso di tempo: Baseline, 6 months
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Flicker light-induced dilation of the retinal vessels (percentage increase over baseline diameter) will be measured in the right or left eye of each study participant using the Dynamic Vessel Analyzer (DVA, IMEDOS Systems, Jena, Germany).
The change in retinal vessel diameters is tracked and reported as a %change from baseline, before and after treatment.
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Baseline, 6 months
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Neurovascular Coupling Using Transcranial Doppler
Lasso di tempo: Baseline, 6 months
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Transcranial Doppler sonography will be used to measure the change in the blood flow velocities during the cognitive n-back task between before and after treatment.
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Baseline, 6 months
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Microvascular Endothelial Function
Lasso di tempo: Baseline, 6 months
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Changes in microvascular endothelial function will be assessed using laser speckle contrast imaging (LSCI) in the hand using the flow mediated dilation approach.
The change in skin perfusion is calculated and reported as a fold change from baseline.
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Baseline, 6 months
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Macrovascular Endothelial Function
Lasso di tempo: Baseline, 6 months
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Changes in macrovascular endothelial function will be assessed using sonography during flow mediated dilation approach.
The change in brachial artery diameter is calculated and reported as a %change from baseline.
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Baseline, 6 months
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Deep Tissue Oxygen Saturation
Lasso di tempo: Baseline, 6 months
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Transcutaneous deep tissue oxygen saturation will be measured using the inSpectra near infrared device.
The data are calculated and reported as a %change from baseline.
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Baseline, 6 months
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Arterial Stiffness
Lasso di tempo: Baseline, 6 months
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The arterial stiffness will be measured using the pulse wave analysis approach (SphygmoCor, Atcor medical, Itasca IL, or similar).
Analysis generated the augmentation index which will be used for comparison before and after treatment.
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Baseline, 6 months
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ECG
Lasso di tempo: Baseline, 6 months
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ECG will be recorded for heart rate variability analysis.
The values of high frequency domain, low frequency domain, their ratio, as well as total power will be calculated and used for comparison before and after treatment.
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Baseline, 6 months
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Glycocalyx - Perfused Boundary Region
Lasso di tempo: Baseline, 6 months
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Video recordings of the sublingual vasculature will be performed using the high definition video camera GlycoCheck (Microvascular health solutions).
Data collected will include perfused boundary region (um), and will be used for comparison before and after treatment.
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Baseline, 6 months
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Capillary Density
Lasso di tempo: Baseline, 6 months
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Video recordings of the sublingual vasculature will be performed using the high definition video camera GlycoCheck (Microvascular health solutions).
Data collected will include capillary density (mm/mm^2), and will be used for comparison before and after treatment.
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Baseline, 6 months
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Red Blood Cell Velocity
Lasso di tempo: Baseline, 6 months
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Video recordings of the sublingual vasculature will be performed using the high definition video camera GlycoCheck (Microvascular health solutions).
Data collected will include red blood cell velocity (um/sec), and will be used for comparison before and after treatment.
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Baseline, 6 months
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Inhibitory Control and Attention
Lasso di tempo: Baseline, 6 months
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Flanker Inhibitory Control and Attention Test was used to assess inhibitory control and attention.
The participant is asked to focus on a particular stimulus while inhibiting attention to the stimuli flanking it.
Scores are fully adjusted to nationally representative normative sample of NIH toolbox test takers, accounting for age, sex, race, and education (mean = 50; SD = 10).
Higher scores represent better outcomes.
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Baseline, 6 months
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Episodic Memory
Lasso di tempo: Baseline, 6 months
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Picture Sequence Memory Test was used to assess episodic memory.
Participants are shown a number of activities, and then asked to reproduce the sequence of pictures as it was presented to them.
Scores are fully adjusted to nationally representative normative sample of NIH toolbox test takers, accounting for age, sex, race, and education (mean = 50; SD = 10).
Higher scores represent better outcomes.
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Baseline, 6 months
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Working Memory
Lasso di tempo: Baseline, 6 months
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List Sorting Working Memory Test was used to assess working memory.
The participant is asked to recall and sequence different stimuli that are presented visually and via audio.
Scores are fully adjusted to nationally representative normative sample of NIH toolbox test takers, accounting for age, sex, race, and education (mean = 50; SD = 10).
Higher scores represent better outcomes.
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Baseline, 6 months
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Language
Lasso di tempo: Baseline, 6 months
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Picture Vocabulary Test measures receptive vocabulary administered in a computer-adaptive test (CAT) format.
Respondents select the picture that most closely matches the meaning of the word.
Scores are fully adjusted to nationally representative normative sample of NIH toolbox test takers, accounting for age, sex, race, and education (mean = 50; SD = 10).
Higher scores represent better outcomes.
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Baseline, 6 months
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Executive Function
Lasso di tempo: Baseline, 6 months
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Dimensional Change Card Sort Test was used to assess cognitive flexibility and attention.
The participant is asked to match a series of picture pairs to a target picture.
Scores are fully adjusted to nationally representative normative sample of NIH toolbox test takers, accounting for age, sex, race, and education (mean = 50; SD = 10).
Higher scores represent better outcomes.
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Baseline, 6 months
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Processing Speed
Lasso di tempo: Baseline, 6 months
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Pattern Comparison Processing Speed Test was used to assess processing speed.
Participants are asked to quickly determine whether two stimuli are the same or not the same.
Scores are fully adjusted to nationally representative normative sample of NIH toolbox test takers, accounting for age, sex, race, and education (mean = 50; SD = 10).
Higher scores represent better outcomes.
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Baseline, 6 months
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Collaboratori e investigatori
Sponsor
Sponsor
Investigatori
Investigatori
- Investigatore principale: Stefano Tarantini, PhD, University of Oklahoma
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Inizio studio
Completamento primario (Effettivo)
Completamento primario
Completamento dello studio (Effettivo)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- 14856
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