Purpose

The purpose of this pilot study is to evaluate whether a combination of two drugs, dasatinib (D) and quercetin (Q) [D+Q], penetrate the brain using cerebrospinal fluid (CSF) in older adults with early Alzheimer's disease (AD). This combination of drug therapy has been shown to affect dying cells in humans with other chronic illnesses and in Alzheimer's mice models. The study team want to know if this combination of medications will reach the brain in order to evaluate if this intervention may be effective for treating AD symptoms in future studies. This is also known as a "proof of concept" study.

Condition

Eligibility

Eligible Ages
Over 65 Years
Eligible Genders
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  1. Age 65 years or above.
  2. Clinical diagnosis of AD (MoCA 10-18 and Clinical Dementia Rating Scale/CDR = 1) on a stable dose of cholinesterase inhibitors for at least three months
  3. Body Mass Index (BMI) within range of 19 - 35 kg/ m2
  4. Labs: Normal blood cell counts without clinically significant excursions (WBCs: 4,500-10,500 cells/mcL; absolute neutrophil count: 1,800-8,700 cells/mcL; platelets: 140-450 K/uL; hemoglobin 12.0-17.5 grams/dL); liver and renal function (AST 10-40 IU/L, total bilirubin 0.1-1.4 mg/dl); cholesterol (<240 mg/dl), triglycerides (<300 mg/dl), and glucose control (HbA1c < 7%). PT/PTT/INR within normal limits
  5. Participants must be accompanied by a Legally Authorized Representative designated to sign informed consent and to provide study partner reported outcomes at all remaining visits
  6. Participants must have no plans to travel over the next 4-5 months that interfere with study visits following consent

Exclusion Criteria

  1. Hearing, vision, or motor deficits despite corrective devices;
  2. Alcohol or drug abuse;
  3. MRI contraindications;
  4. Myocardial infarction, angina, stroke or transient ischemic attack in the past 6 months; QT interval >440 on ECG will not be enrolled. Chronic heart failure will be exclusionary;
  5. Participants with coagulation disorders;
  6. Neurologic, musculoskeletal, or other condition that limits subject's ability to complete study physical assessments;
  7. Uncontrolled diabetes (HbA1c > 7% or the current use of insulin);
  8. Current or chronic history of liver disease, or known hepatic or biliary abnormalities;
  9. Use of anti-arrhythmic medications known to cause QTc prolongation, anti-platelet or anti-coagulant medication;
  10. Current use of quinolone antibiotics.
  11. Poorly controlled blood pressure (systolic BP>160, diastolic BP>90 mmHg).
  12. Active inflammatory, autoimmune, infectious, hepatic, gastrointestinal, malignant, and psychiatric disease.
  13. History of or MRI-positive for any space occupying lesion, including mass effect or abnormal intracranial pressure, which would indicate contraindication to lumbar puncture

Study Design

Phase
Phase 1/Phase 2
Study Type
Interventional
Intervention Model
Single Group Assignment
Intervention Model Description
This study is an open-label pilot study of intermittent D+Q to measure its target engagement in CSF and blood, and to establish the feasibility and safety of D+Q treatment in older adults with early stage AD as initial proof-of-concept for a larger Phase 2 clinical trial.
Primary Purpose
Treatment
Masking
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Intermittent D+Q
Senolytic treatment in 5 individuals with early AD to determine levels of drug that reach the central nervous system (CNS) by collecting cerebral spinal fluid (CSF), and begin collecting initial data on target engagement of senescent cells, AD-related markers, and AD-relevant outcomes for future trials.
  • Drug: Dasatinib + Quercetin
    Intermittent D+Q administered for 2 days on/14 days off for 12 weeks (6 cycles)
    Other names:
    • D+Q

More Details

Status
Not yet recruiting
Sponsor
The University of Texas Health Science Center at San Antonio

Study Contact

Nicolas Musi, MD
210-617-5197
musi@uthscsa.edu

Detailed Description

Up to 40 potential candidates will be pre-screened to identify eligible men and women ages 65 years and over with a clinical diagnosis of early AD on a stable dose of cholinesterase inhibitors for at least 3 months (for example, Aricept).

Eligible participants will undergo laboratory assessments of blood and urine, receive study medications over a twelve week period, and complete pre- and post-treatment testing including: an MRI for digital imaging of the brain; lumbar puncture to obtain cerebrospinal fluid; memory and thinking assessments; quality of life questionnaires; and tests of walking, balance and strength, all of which will be done for research purposes only.

Participants must be accompanied by a Legally Authorized Representative and have no travel plans for 4-5 months that would interfere with study visits.

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.