Aging and Exercise Impacts on Glymphatic Function
17 augusti 2026 uppdaterad av: Jiaen Liu, University of Texas Southwestern Medical Center
Impact of Aging and Exercise on Glymphatic Function Using Multi-modal MRI
This is a prospective, interventional, non-blinded, single center research project that will recruit cognitively unimpaired subjects in the 25-55 year old and 55-75 year old range. This study will use acute aerobic exercise as a natural intervention model to increase cardiac activity which may further drive the glymphatic function. There will be no randomization, and all enrolled subjects will participate in the exercise session.
Hypotheses: revealed by the multi-modal magnetic resonance imaging (MRI) approach, glymphatic dysfunction increases with age and is associated with preclinical Alzheimer's Disease (AD) pathology in cognitively unimpaired individuals. Using acute aerobic exercise as a human model, the enhancement of cerebrospinal fluid-interstitial fluid (CSF-ISF) exchange caused by elevated cardiac activity and paravascular cerebrospinal fluid (pCSF) dynamics can be validated.
Studieöversikt
Status
Har inte rekryterat ännu
Intervention / Behandling
Detaljerad beskrivning
The purpose of this research study is to understand how the human brain removes amyloid beta (Aβ) protein which can lead to Alzheimer's disease (AD), using non-invasive magnetic resonance imaging (MRI) techniques.
Participants will first go through screening including health survey and blood draw.
Depending on their age, enrolled participants will take neuropsychological assessment, sleep and quality-of-life survey, exercise testing, MRI and positron emission tomography (PET) scans.
Depending on individual age, the study may include up to three separate visits, a blood draw, an MRI visits and a PET scan visit.
The greatest risks of this study include the possibility of injury during the exercise testing, MRI and PET scans, and loss of confidentiality.
Studietyp
Interventionell
Inskrivning (Beräknad)
240
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studiekontakt
- Namn: Jiaen Liu, Ph.D.
- Telefonnummer: 612/423-8380
- E-post: Jiaen.Liu@UTSouthwestern.edu
Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
- Äldre vuxen
Tar emot friska volontärer
Ja
Beskrivning
Inclusion Criteria:
- age 25-75 years old
- cognitively unimpaired (CU)
- Mini-Mental State Examination (MMSE) score ≥27 at enrollment screening
- matched gender
- all racial/ethnic groups
Exclusion Criteria:
- pregnant women
- history of stroke or other major cerebrovascular disease;
- diagnosis of Alzheimer's disease (AD) or other types of dementia;
- diagnosis of major neurologic and psychiatric disorders (e.g., Parkingson's disease, major depression);
- history of prior head trauma, significant autoimmune disorders,
- sleep apnea;
- major systemic illness likely to affect the central nervous system, e.g., uncontrolled diabetes, severe cardiovascular disease, cancer, etc.;
- prior or current alcoholism or drug abuse;
- resistant hypertension (SBP ≥140 or DBP ≥ 90 mmHg despite 3 antihypertensive drugs at maximal doses);
- orthostatic hypotension defined as the third standing systolic blood pressure (SBP) < 100mmHg; any contraindications to having a MRI, e.g., claustrophobia, pacemaker or other medical device of metal;
- any conditions judged by the investigators to be medically inappropriate, risky or likely to cause poor study compliance.
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Grundläggande vetenskap
- Tilldelning: N/A
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Experimentell: Acute aerobic exercise- Interventional Group
This group will include all enrolled participants from all age groups, will receive MRI scans for glymphatic function and participate in acute aerobic exercise (intervention) between MRI sessions.
They may / may not undergo PET scans.
|
During the MRI session, subject will perform aerobic exercise on a MR-compatible ergometer and will be guided to reach certain heart rate level depending on subject's age.
Their vital signs will be closely monitored by the research team to ensure safety.
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Exercise-induced changes in heart rate (HR)
Tidsram: Baseline (pre-exercise), immediately post-exercise
|
During exercise, HR will be continuously monitored using photoplethysmography (ppg) by a device attached to a finger of the subjects.
|
Baseline (pre-exercise), immediately post-exercise
|
|
Exercise-induced changes in cardiac output (CO)
Tidsram: Baseline (pre-exercise), immediately post-exercise
|
During exercise, CO will be calculated based on HR and real time blood pressure (BP) acquired on the index finger using an MRI-compatible device.
|
Baseline (pre-exercise), immediately post-exercise
|
|
Exercise-induced changes in MRI measurements of pCSF dynamics
Tidsram: Baseline (pre-exercise), immediately post-exercise
|
pCSF will be assessed using MRI in the brain.
|
Baseline (pre-exercise), immediately post-exercise
|
|
Exercise-induced changes in MRI measurements of CSF-ISF exchange
Tidsram: Baseline (pre-exercise), immediately post-exercise
|
CSF-ISF exchange will be assessed using MRI in the brain.
|
Baseline (pre-exercise), immediately post-exercise
|
Samarbetspartners och utredare
Det är här du hittar personer och organisationer som är involverade i denna studie.
Samarbetspartners
Utredare
- Huvudutredare: Jiaen Liu, Ph.D., University of Texas Southwestern Medical Center
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart (Beräknad)
1 december 2026
Primärt slutförande (Beräknad)
1 december 2029
Avslutad studie (Beräknad)
1 december 2029
Studieregistreringsdatum
Först inskickad
12 augusti 2026
Först inskickad som uppfyllde QC-kriterierna
17 augusti 2026
Första postat (Faktisk)
20 augusti 2026
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
20 augusti 2026
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
17 augusti 2026
Senast verifierad
1 augusti 2026
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- STU20260916
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
JA
IPD-planbeskrivning
Individual participant data that underlie the results reported in publication, after deidentification (text, tables, figures, and appendices).
Tidsram för IPD-delning
Between the time range beginning 3 months and ending 5 years following publication.
Kriterier för IPD Sharing Access
Researchers who provide a methodologically sound proposal.
Proposals should be directed to Jiaen.Liu@UTSouthwestern.edu.
To gain access, data requestors will need to sign a data access agreement.
Data are available for 5 years at NIH's data repository.
IPD-delning som stöder informationstyp
- STUDY_PROTOCOL
- SAV
Läkemedels- och apparatinformation, studiedokument
Studerar en amerikansk FDA-reglerad läkemedelsprodukt
Nej
Studerar en amerikansk FDA-reglerad produktprodukt
Nej
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