Effets cérébromicrovasculaires de l'alimentation limitée dans le temps chez les personnes âgées
Aperçu de l'étude
Statut
Statut
Les conditions
Les conditions
Intervention / Traitement
Intervention / Traitement
Description détaillée
Type d'étude
Type d'étude
Inscription (Réel)
Inscription
Phase
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
Coordonnées de l'étude
- Nom: Stefano Tarantini, PhD
- Numéro de téléphone: 47818 (405)-271-8000
- E-mail: stefano-tarantini@ouhsc.edu
Sauvegarde des contacts de l'étude
- Nom: Andriy Yabluchanskiy, MD, PhD
- Numéro de téléphone: 47097 405-271-8000
- E-mail: andriy-yabluchanskiy@ouhsc.edu
Lieux d'étude
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Oklahoma
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Oklahoma City, Oklahoma, États-Unis, 73117
- University of Oklahoma Health Sciences Center
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Critères de participation
Critère d'éligibilité
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
La description
Critère d'intégration:
-Adultes en bonne santé ≥21 ans
Critère d'exclusion:
-Incapable de lire ou d'écrire en anglais
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Autre
- Répartition: N / A
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Nombre de bras
Armes et Interventions
Groupe de participants / BrasGroupe de participants / Bras |
Intervention / TraitementIntervention / Traitement |
|---|---|
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Expérimental: 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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Que mesure l'étude ?
Principaux critères de jugement
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Neurovascular Coupling Using Functional Near Infrared Spectroscopy (fNIRS)
Délai: Baseline, 6 months
|
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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Mesures de résultats secondaires
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Neurovascular Coupling Using the Dynamic Retinal Vessel Analysis
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
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Neurovascular Coupling Using Transcranial Doppler
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
|
Microvascular Endothelial Function
Délai: Baseline, 6 months
|
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
Délai: 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
Délai: Baseline, 6 months
|
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
Délai: Baseline, 6 months
|
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
Délai: Baseline, 6 months
|
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
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
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Capillary Density
Délai: Baseline, 6 months
|
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
Délai: 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
|
|
Inhibitory Control and Attention
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
|
Episodic Memory
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
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Working Memory
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
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Language
Délai: Baseline, 6 months
|
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
Délai: Baseline, 6 months
|
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
Délai: Baseline, 6 months
|
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.
|
Baseline, 6 months
|
Collaborateurs et enquêteurs
Parrainer
Parrainer
Les enquêteurs
Les enquêteurs
- Chercheur principal: Stefano Tarantini, PhD, University of Oklahoma
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Début de l'étude
Achèvement primaire (Réel)
Achèvement primaire
Achèvement de l'étude (Réel)
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Première publication
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour publiée
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
Autres numéros d'identification d'étude
- 14856
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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