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Genetic Predisposition to DiseasePhase 1NCT07728175

Effects of Sirolimus on Asymptomatic ApoE4 Carriers

A Phase 1 study testing Sirolimus (rapamycin) in people with Genetic Predisposition to Disease and Healthy Volunteer, run by University of Missouri-Columbia at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

Alzheimer's disease is a devastating neurodegenerative disease characterized by accumulation of clumps (also called plaques) and bundles of fibers (also called tangles) in the brain, for which there is currently no cure. Sirolimus (Rapamycin) is an FDA-approved medication which may improve the blood flow to the brain. Read more about this study

Who is it for?
Ages 45 to 65 years, women onlyHealthy volunteers can take part
What is being tested?
Sirolimus (rapamycin)
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
225 participants
Where
1 siteUnited States
Study dates
1 Dec 2026to 7 Jul 2028
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 45 to 65 years
  • Women only
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Willing and able to provide informed consent
  • Sex assigned at birth: female
  • 45-65 years old
  • Able to perform self-care and activities of daily living with no or minimal assistance
  • Post-menopausal status or use of highly effective contraception. Post-menopausal is defined as either
  • 12 months of spontaneous amenorrhea with an appropriate clinical profile (e.g., age-appropriate, history of vasomotor symptoms)
Show all 10Show fewer
  • surgical bilateral oophorectomy (with or without hysterectomy), total hysterectomy, or tubal ligation at least 6 weeks prior to screening. For oophorectomy alone, post-menopausal status must be confirmed by follow-up hormone level assessment
  • Highly effective contraception includes intrauterine devices (IUD), oral contraceptives, or other hormonal contraceptives including injectables, transdermal patches, implants or vaginal rings, or refraining from heterosexual intercourse during the 4 weeks of taking the study drug and for 2 weeks after no longer taking the study drug
  • Body weight of ≥ 40 kg
  • Ability to effectively communicate with the investigator and comply with study requirements

Who cannot join

  • Diagnosis of mild cognitive impairment (MCI), dementia, or Alzheimer's disease
  • BMI ≥ 35 (based on MRI feasibility)
  • Type 1 diabetes or poorly controlled type 2 diabetes (HbA1c ≥ 6.5%)
  • History of skin ulcers or poor wound healing
  • Current tobacco or illicit drug use or alcohol abuse (defined as ≥ 3 per day or ≥ 7 per week for women) (Per NIAAA guidelines)
  • Use of anti-platelet or anti-coagulant medications other than aspirin
Show all 27Show fewer
  • Required use of medications that affect cytochrome P450 3A4 (CYP3A4) or alter cerebral blood flow (see Appendix 1 for tables of excluded medications)
  • Immunosuppressant therapy within the last year
  • Chemotherapy or radiation treatment within the last year
  • Current or chronic history of liver or kidney disease or known hepatic or biliary abnormalities
  • Untreated hypertriglyceridemia (fasting triglycerides < 300 mg/dl)
  • Current or chronic significant history of pulmonary disease
  • Chronic heart failure
  • Pregnancy or lactation
  • Recent history (past six months) of myocardial infarction, active coronary artery disease, intestinal disorders, stroke, or transient ischemic attack
  • Poorly controlled blood pressure (systolic BP > 160 or diastolic BP > 100 mmHg)
  • Active inflammatory, COVID-19, autoimmune, infectious, hepatic, gastrointestinal, malignant, and/or severe mental illness
  • History of, or MRI, or CT positive for, any space occupying brain lesion, including mass effect or abnormal intracranial pressure
  • Organ transplant recipients
  • History of Stroke
  • History of ruptured intracranial aneurysm
  • History of malignancy within the past 2 years, with the following exceptions:
  • Localized basal cell or squamous cell carcinoma of the skin
  • Prostate cancer confined to the gland (AJCC stage T2N0M0 or better)
  • Cervical carcinoma in situ
  • Breast cancer localized to the breast
  • History of epilepsy

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

United States1 site, 1 recruiting
  • University of Missouri

    Columbia, Missouri, 65212

    Kim Ray, 573-884-5372, raykk@health.missouri.edu

    Nathan Bresette, nbhtd@missouri.edu

    Recruiting

Other trials in United States

About this study

Official title: Effects of Sirolimus on Middle Aged Asymptomatic ApoE4 Carriers

Alzheimer's disease is a devastating neurodegenerative disease characterized by accumulation of clumps (also called plaques) and bundles of fibers (also called tangles) in the brain, for which there is currently no cure.

Sirolimus (Rapamycin) is an FDA-approved medication which may improve the blood flow to the brain. The purpose of the clinical trial is to find out whether sirolimus can help improve blood flow and energy use in the brain in women ages 45 to 65 who have the ApoE4 gene, a gene which increases the risk of developing Alzheimer's disease later in life.

Read more

There will be two arms in this trail, a sirolimus arm and a placebo arm. A placebo is a pill that looks like the study drug, but it does not have any real medicine in it. Participants will be randomized to one arm or the other, but not to both arms. Three study visits over a 12-week period are required.

Participants will: (i) Complete some questionnaires about how well you think; (ii) Complete genetic testing for the ApoE4 gene; (iii) Have blood work, blood pressure and height and weight collected; (iv) Take either Sirolimus or a placebo daily, by mouth, for approximately 4 weeks; (v) Keep a diary of when the sirolimus or placebo is taken; (vi) Complete 2 Magnetic Resonance Imaging (MRI) exams

Being tested
Sirolimus (rapamycin), Placebo
Keywords
ApoE4 positive, Cerebral Blood Flow, Sirolimus, Rapamycin, Magnetic Resonance Imaging
Medical subject headings
Genetic Predisposition to Disease

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Sirolimus (rapamycin)Drug

    Participants in Sirolimus arm will receive Sirolimus.

  • PlaceboDrug

    Participants in the Placebo arm will receive Placebo

Study groups in NCT07728175
Study groupRoleWhat they receive
SirolimusActive comparatorNot described
Receives: Drug: Sirolimus (rapamycin)
PlaceboPlacebo comparatorNot described
Receives: Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Cerebral Blood Flow as measured by MRI

    Rate of blood perfusion expressed as mL/100g/min globally and regionally

    Measured: Baseline to 4 weeks

Secondary outcomes (6)
  1. Measure the change in plasma Marker-cytokine using a Meso Scale Discovery (MSD) analyzer.

    Measured: Baseline to 4 weeks

  2. Measure baseline to post-treatment changes in Plasma Markers-AD pathology using a Meso Scale Discovery (MSD) analyzer

    Measured: Baseline to 4 weeks

  3. Measure brain function connectivity by fMRI

    Measured: Baseline to 4 weeks

  4. Measurement of blood brain barrier by MRI

    Measured: Baseline to 4 weeks

  5. Measurement of brain oxygenation by MRI

    Measured: Baseline to 4 weeks

  6. Measurement of glucose uptake in the brain by PET imaging

    Glucose uptake in the brain globally and regionally

    Measured: Baseline to 4 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Jul 2026
  2. Study start1 Dec 2026 (estimated)
  3. Primary completion31 Dec 2027 (estimated)
  4. Study completion7 Jul 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Basic science
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
225 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07728175
Sponsor's protocol ID
2134312
Status last verified
Sep 2026
First submitted
16 Jul 2026
Last updated
5 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Lynch T, Price A. The effect of cytochrome P450 metabolism on drug response, interactions, and adverse effects. Am Fam Physician. 2007 Aug 1;76(3):391-6.

    PubMed 17708140
  • Lin AL, Aware C, Neher C, Hamdi M, Ericsson A, Khegai O, Patrie J, Kurt M, Govindarajan M, Woods C, Ivanich K, Beversdorf D, Cheng J, Balchandani P, Gonzales M, Altes T. Rapamycin enhances neurovascular, peripheral metabolic, and immune function in cognitively normal, middle-aged APOE4 Carriers: genotype-dependent effects compared to non-carriers. Res Sq [Preprint]. 2025 Mar 19:rs.3.rs-6214340. doi: 10.21203/rs.3.rs-6214340/v1.

    PubMed 40166019
  • Ozcelik S, Fraser G, Castets P, Schaeffer V, Skachokova Z, Breu K, Clavaguera F, Sinnreich M, Kappos L, Goedert M, Tolnay M, Winkler DT. Rapamycin attenuates the progression of tau pathology in P301S tau transgenic mice. PLoS One. 2013 May 7;8(5):e62459. doi: 10.1371/journal.pone.0062459. Print 2013.

    PubMed 23667480
  • Mannick JB, Del Giudice G, Lattanzi M, Valiante NM, Praestgaard J, Huang B, Lonetto MA, Maecker HT, Kovarik J, Carson S, Glass DJ, Klickstein LB. mTOR inhibition improves immune function in the elderly. Sci Transl Med. 2014 Dec 24;6(268):268ra179. doi: 10.1126/scitranslmed.3009892.

    PubMed 25540326
  • Lelegren M, Liu Y, Ross C, Tardif S, Salmon AB. Pharmaceutical inhibition of mTOR in the common marmoset: effect of rapamycin on regulators of proteostasis in a non-human primate. Pathobiol Aging Age Relat Dis. 2016 Jun 23;6:31793. doi: 10.3402/pba.v6.31793. eCollection 2016.

    PubMed 27341957
  • Sills AM, Artavia JM, DeRosa BD, Ross CN, Salmon AB. Long-term treatment with the mTOR inhibitor rapamycin has minor effect on clinical laboratory markers in middle-aged marmosets. Am J Primatol. 2019 Feb;81(2):e22927. doi: 10.1002/ajp.22927. Epub 2018 Oct 12.

    PubMed 30311681
  • Tardif S, Ross C, Bergman P, Fernandez E, Javors M, Salmon A, Spross J, Strong R, Richardson A. Testing efficacy of administration of the antiaging drug rapamycin in a nonhuman primate, the common marmoset. J Gerontol A Biol Sci Med Sci. 2015 May;70(5):577-87. doi: 10.1093/gerona/glu101. Epub 2014 Jul 19.

    PubMed 25038772
  • Ross C, Salmon A, Strong R, Fernandez E, Javors M, Richardson A, Tardif S. Metabolic consequences of long-term rapamycin exposure on common marmoset monkeys (Callithrix jacchus). Aging (Albany NY). 2015 Nov;7(11):964-73. doi: 10.18632/aging.100843.

    PubMed 26568298
  • Spilman P, Podlutskaya N, Hart MJ, Debnath J, Gorostiza O, Bredesen D, Richardson A, Strong R, Galvan V. Inhibition of mTOR by rapamycin abolishes cognitive deficits and reduces amyloid-beta levels in a mouse model of Alzheimer's disease. PLoS One. 2010 Apr 1;5(4):e9979. doi: 10.1371/journal.pone.0009979.

    PubMed 20376313
  • Lin AL, Parikh I, Yanckello LM, White RS, Hartz AMS, Taylor CE, McCulloch SD, Thalman SW, Xia M, McCarty K, Ubele M, Head E, Hyder F, Sanganahalli BG. APOE genotype-dependent pharmacogenetic responses to rapamycin for preventing Alzheimer's disease. Neurobiol Dis. 2020 Jun;139:104834. doi: 10.1016/j.nbd.2020.104834. Epub 2020 Mar 12.

    PubMed 32173556

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Sirolimus (rapamycin) in people with Genetic Predisposition to Disease and Healthy Volunteer, run by University of Missouri-Columbia at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 10 inclusion and 27 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 5 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Kim Ray (573-884-5372, umhsradstudycoordinators@health.missouri.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Cerebral Blood Flow as measured by MRI (time frame: Baseline to 4 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07728175, which also lists 10 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Oct 2026; AzTrials last refreshed its copy on 7 Nov 2026.

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