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AKG and Brain Health in Aging

2. Oktober 2026 aktualisiert von: University of Oklahoma

Alpha-Ketoglutarate: A Novel Therapeutic Strategy to Improve Neurogliovascular Coupling and Cognitive Aging in Older Adults

This proposal will test the hypothesis that AKG supplementation will improve NGVC responses and cognitive performance in older adults. We will also test the hypothesis that these effects are mediated by a decrease in age-related oxidative stress within NGVU cells.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

These hypotheses will be tested in a randomized, double-blind, placebo-controlled clinical trial with 24 weeks of AKG supplementation in community dwelling older adults. Our team has the relevant expertise in clinical trials with older adults, NGVC assessments, and EVs analysis, providing a high degree of confidence for the successful completion of this project within the award time frame.

Studientyp

Interventionell

Einschreibung (Geschätzt)

60

Phase

  • Phase 2

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studieren Sie die Kontaktsicherung

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

55 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Age ≥55 years
  • Adequate hearing and visual acuity to participate in the examinations (with or without aids)
  • Ability to read and write in English
  • Competence to provide informed consent
  • Montreal Cognitive Assessment score ≥26
  • Stable medications for ≥3 months

Exclusion Criteria:

  • Vision or hearing impairment that would impair the ability to complete study assessments
  • Active CNS disease including multiple sclerosis, uncontrolled seizures, active brain cancer
  • Cerebrovascular accident other than TIA within 60 days prior to Visit 0
  • Major psychiatric disease, including major depression not currently controlled and alcohol or drug abuse
  • Abnormal kidney function (creatinine >2mg/dL or EGFR <30mL/min) by most recent labs within 6 months prior to Visit 0
  • Elevated liver enzymes (AST and/or ALT above x2 upper limit of normal) by most recent labs within 6 months prior to Visit 0
  • Elevated blood calcium level (above 10.3 mg/dL) by most recent labs within 6 months prior to Visit 0
  • History of kidney stones
  • Any other medical condition which, in the opinion of investigator, would render the patient inappropriate or too unstable to complete the study protocol
  • Current use of AKG or NAD+ supplements

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Grundlegende Wissenschaft
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Verdreifachen

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Calcium AKG

1 g of calcium-bound AKG daily

Participants will be randomized to receive either oral Calcium AKG at a total daily dose of 1 g or an identically appearing placebo for 24 weeks.

Placebo-Komparator: Placebo

Visually identical placebo

identically appearing placebo capsule

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Change in neurogliovascular coupling using functional near infrared spectroscopy (fNIRS)
Zeitfenster: 24 weeks

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 and deoxygenated hemoglobin measured over the cortical brain tissues. Neurogliovascular coupling will be evaluated as a change in oxy- and deoxy-hemoglobin between before and after treatment. Units of measure - beta. Reported as a %change from baseline, before and after treatment.

24 weeks
Change in neurovascular coupling using electroencephalography (EEG)
Zeitfenster: 24 weeks

EEG signal will be collected to generate spectral data. These data will be used for comparison of EEG activity between before and after treatment. Units of measure - power spectral density. Reported as a %change from baseline, before and after treatment.

24 weeks

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Change in Attention
Zeitfenster: 24 weeks

The allocation of one's limited capacities to deal with an abundance of environmental stimulation will be measured in a combined "Flanker Inhibitory Control and Attention Test".Units of measure - score (from 0 to 10, bigger number is better). Reported as a %change from baseline.

24 weeks
Change in Working Memory
Zeitfenster: 24 weeks

The ability to store information until the amount of information to be stored exceeds one's capacity to hold that information will be measured using the "List Sorting Working Memory Test". Unit of measure - overall score (bigger number is better). Reported as a %change from baseline.

24 weeks
Change in Executive Function
Zeitfenster: 24 weeks

The capacity to plan, organize and monitor the executive of behaviors that are strategically directed in a goal-oriented manner will be measured using the "Dimensional Change Card Sort Test". Units of measure - score (from 0 to 10, bigger number is better). Reported as a %change from baseline.

24 weeks
Change in Processing Speed
Zeitfenster: 24 weeks

Pattern Comparison Processing Speed Test assesses the amount of information that can be processed within a certain unit of time. Items are simple so as to purely measure processing speed. Units of measure - score (from 0 to 130, bigger number is better). Reported as a %change from baseline.

24 weeks
Change in Episodic Memory
Zeitfenster: 24 weeks

Cognitive processes involved in the acquisition, storage and retrieval of new information, will be measured using the "Picture Sequence Memory Test". Unit of measure - overall score (bigger number is better). Reported as a %change from baseline.

24 weeks
Body composition
Zeitfenster: 24 weeks

Weight and body composition using a bioimpedance scale and/or DXA scan. Reported as a %change from baseline, before and after completion of study

24 weeks
Change in Language
Zeitfenster: 24 weeks

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, before and after treatment. Unit of measure - overall score (bigger number is better). Reported as a %change from baseline.

24 weeks
Self-reported cognitive function
Zeitfenster: 24 weeks

Self-reported cognitive function will be assessed using the PROMIS Short Form v2.0 Cognitive Function 4a, which measures participants' perceived cognitive abilities and difficulties in daily life.

24 weeks
Change in blood metabolic panel markers
Zeitfenster: 24 weeks

Complete metabolic panel (General Chemistry 13 Panel and Lipid Panel from Piccolo Xpress). Reported as a %change from baseline, before and after completion of study

24 weeks
Physical activity
Zeitfenster: 24 weeks

We will assess physical activity and classify it as sedentary, lightly active, active, or very active using the self-administered CHAMPS (Community Health Activities Model Program for Seniors) activities questionnaire. Outcome scores will be assessed using the weekly frequency of physical activity and calculated based on the standardized 6-point categorical duration scale, where scores range from a minimum of 0 hours per week (indicating complete inactivity) to an open-ended maximum number of hours. Higher scores indicate a better outcome, representing very active.

24 weeks
Sleep quality
Zeitfenster: 24 weeks

Sleep quality will be assessed using the Pittsburgh Sleep Quality Index (PSQI), which evaluates variables including "duration of sleep", "sleep disturbance", "sleep latency", "daytime dysfunction due to sleepiness", "sleep efficiency", "overall sleep quality", and "need meds to sleep". All variables will be scored from a minimum score of 0 (better) to a maximum score of 3 (worse) based on the answers in the questionnaire, to obtain a total score ranging from 0 to 21, with the total score ≤ 5 associated with good sleep quality, and > 5 associated with poor sleep quality.

24 weeks
Global Rating of Change (GRC)
Zeitfenster: at final visit

After 24 weeks of the intervention, participants will complete the Global Rating of Change (GRC) to report whether they perceive any overall change following the study supplement or placebo. The GRC scale quantifies a patient's change in health status over time. We will utilize an 11-point Likert scale from -5 (very much worse) to +5 (very much improved), including 0 (unchanged), as the rating scale. Participants will be asked to rate their change based on one question: (1) "With respect to your cognition (thinking, attention, concentration, memory), how would you describe yourself now compared to the baseline that is starting treatment 24 weeks ago?"

at final visit

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Mitarbeiter

Ermittler

  • Hauptermittler: Andriy Yabluchanskiy, MD, PhD, University of Oklahoma Harold Hamm Health Campus

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. Februar 2027

Primärer Abschluss (Geschätzt)

31. August 2029

Studienabschluss (Geschätzt)

31. August 2029

Studienanmeldedaten

Zuerst eingereicht

25. September 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

2. Oktober 2026

Zuerst gepostet (Tatsächlich)

6. Oktober 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

6. Oktober 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. Oktober 2026

Zuletzt verifiziert

1. Oktober 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • 19927
  • 1R21AG103782 (US NIH Stipendium/Vertrag)

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

Beschreibung des IPD-Plans

unidentified data will be shared via research repositories

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .