δ in Dementia Clinical Trials

Recruiting now · Not applicable

Conditions studied: Alzheimer's Disease (AD), Dementia, Cognitive Decline, Mild Cognitivie Impairment (MCI)

In brief

The goal of this clinical trial is to demonstrate potential improvements in clinical trial methods relating to dementia and cognitive decline. The main questions it aims to answer are: * Can an intervention's outcome be better assessed by a latent variable ("δ") integrating cognitive performance with functional status? * Can latent biomarkers of δ guide the selection of an intervention that will modulate dementia severity? * Can a latent variable, derived from information collected remotely from caregivers, preselect subjects most likely to respond to the intervention? * Is the effect of the intervention in fact medicated by changes in the targeted biomarker? In this case, the biomarker will be a latent variable derived from several proteins measured in blood (i.e., so-called "adipokines"). The intervention will be donepezil, a medication approved for the treatment of Alzheimer's Disease, but only recently associated with adipokine changes. Participants with cognitive impairment and their caregivers will be interviewed by telephone and those newly prescribed donepezil by their provider for cognitive impairment will be recruited and enrolled. On the basis of the caregiver's report, the cognitively impaired subjects will be assigned to two groups based on a prediction of their response to donepezil. Researchers will compare those groups to see if dementia severity, as measured by δ, improves in predicted responders, and whether the change in the d-score is mediated by changes in adipokines.

Key facts

Study ID: NCT05592678
Run by: The University of Texas Health Science Center at San Antonio
People needed: 200
Starts: 2024-08-05
Expected to finish: 2028-11-30
Last updated by the study team: 2026-05-05

Who can join

Age: 65 and older, up to 100. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Ambulatory outpatient volunteers with co-informants.
Aged 65-100 years
Clinical diagnosis of AD, or MCI.
Capacity to give informed consent.
GDS score (15 item) ≤ 8.
No significant visual or hearing impairments
Standardized dECog score between 1.0 and 5.0 relative to ADNI's cohort.

You may not qualify if…

A history of psychosis, including visual hallucinations;
History or treatment for Parkinson's, or tremor, or Rapid Eye Movement (REM) behavior disorder;
History of bradycardia or syncopal events;
Treatment for cancer in the last 5 years (excluding skin cancers);
Major surgery in the last year;
Treatment for a seizure disorder with anticonvulsants;
Treatment for agitation or psychosis with neuroleptics (treatment of anxiety or insomnia allowed);
Current treatment with donepezil or any other AChEI or exposure within the last six months
With a recently started Donepezil Rx (< 2 weeks), inability to stop Donepezil treatment for 14 days prior to study enrollment.
AChEI treatment not appropriate due to negative risk/benefit ratio based on medical Hx and symptoms during screening. Evaluated by PI and referring clinician.
Co-participation in another study that the PI feels would pose a safety risk or adversely affect data integrity of this study.

Where it is running

Univeristy of Texas Health Science Center at San Antonio (UTHSCSA) — San Antonio, Texas, United States (enrolling)

Full record on ClinicalTrials.gov

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