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Lactate for Energy and Neurocognition

NCT05207397 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 24

Last updated 2025-05-14

No results posted yet for this study

Summary

Improved cardiorespiratory fitness following an aerobic exercise program elicits cognitive benefit in elderly subjects and memory improvement in Alzheimer's disease (AD). The physiological mechanism may be related to exercise-mediated change in circulating factors that permeate the brain. The response to each individual bout of exercise (i.e. the acute exercise response) may differ between subjects and be key to driving brain benefit. In young populations, the acute response to exercise can last hours and affect brain glucose metabolism. However, the field knows little about this acute exercise response in AD. Most exercise intervention trials designed to prevent and slow AD assess biomarkers at two fasting time points: pre- and post-intervention. The acute exercise response in the brain and periphery likely varies between subjects and diagnoses and provide key information regarding mechanisms of benefit. Our primary goals are to characterize the acute exercise response to exercise in the brain (glucose metabolism) and periphery (biomarker response) in aging and AD. We will identify relationships between exercise-related factors (i.e. heart rate, biomarkers) and change in brain metabolism and cognition. Understanding these mechanistic relationships will provide specific targets that can be used in future trials to develop individualized exercise prescriptions and maximize benefit.

Conditions

  • Healthy Aging
  • Alzheimer Disease

Interventions

OTHER

Lactate infusion

The unlabeled lactate infusion cocktail (30% L(+)-lactic acid solution (Sigma) with 2N NaOH, pH4.8) and stable isotope infusions were made by a pharmacy and tested to be sterile and pyrogen free. Upon arriving to the KU Clinical and Translational Science Unit, a catheter will be placed in the subject's hand, which will be placed into a heated hand box for collection of arterialized blood. A second catheter will be placed in the opposing forearm vein for the infusion of lactate isotope solution and unlabeled lactate infusion cocktail. After insertion of the catheters, and prior to isotope infusion, a background blood and breath sample (ParvoMedics TrueOne 2400) will be obtained. We will then administer priming doses of 57.5 mg \[13C3\]lactate, 250 mg D2-glucose and 136 mg H13CO3- followed by continuous infusions of \[13C3\]lactate at 10 mg/min and D2-glucose at 2 mg/min \[53\]. Along with the continuous isotope infusion we will begin infusion of the Na-lact

Sponsors & Collaborators

  • National Institute on Aging (NIA)

    collaborator NIH

  • University of Kansas Medical Center

    lead OTHER

Principal Investigators

  • Jill Morris · University of Kansas Medical Center

Eligibility

Min Age
60 Years
Max Age
95 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-04-12
Primary Completion
2024-03-29
Completion
2024-03-29

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05207397 on ClinicalTrials.gov