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A Study of Oral Tetrahydrouridine-Decitabine in Relapsed or Refractory Myelodysplastic Syndromes (MDS)

Phase 1 Study of Oral Tetrahydrouridine-Decitabine to Treat Relapsed or Refractory Myelodysplastic Syndromes

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07006025
Enrollment
20
Registered
2025-06-05
Start date
2025-06-03
Completion date
2027-03-30
Last updated
2026-01-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

MDS

Brief summary

The goal of this clinical trial is to learn about the safety and effectiveness of the combination drug Tetrahydrouridine (THU) and decitabine (DEC) to treat patients with relapsed or refractory myelodysplastic syndrome. The main questions it aims to answer are: * Does the combination drug exhibit hematological and nonhematological toxicity? * Does the combination drug improve health status and reduce the number of days of hospitalization? Participants will: * Take tetrahydrouridine and decitabine once a week for 24 weeks * Visit the clinic once every 4 weeks for checkups and tests * Keep a diary of their symptoms

Detailed description

This is a single-arm, open-label Phase 1 study of oral THU/decitabine to treat relapsed or refractory MDS. Patients will be treated for 24 weeks in the absence of clear evidence of progressive disease. The primary endpoint is safety. The secondary endpoints will include assessment of response rates by International Working Group (IWG) criteria, quality of life (QoL), and number of days of hospitalization. DNA-methyltransferase 1 (DNMT1) protein levels will be measured in bone marrow and peripheral blood white cells.

Interventions

DRUGDecitabine

Oral tetrahydrouridine and oral decitabine capsule

Sponsors

EpiDestiny, Inc.
CollaboratorINDUSTRY
Treebough Therapies
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Single arm, open label

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Patients must have a diagnosis of MDS that has received one or more prior standard therapies and is relapsed or refractory * Patients must be 18 years of age or older * Patients must have an Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 3 * Patients must have adequate end-organ function * Patient's body weight must be ≥ 41 kg * Subjects must be able to understand and willing to sign a written informed consent document and complete study-related procedures.

Exclusion criteria

* Diagnosis of acute promyelocytic leukemia (APL) * Prior treatment with ≥4 28-day cycles of parenteral or oral decitabine * No other disease-directed therapy, save for hydroxyurea, including experimental or investigational drug therapy for 14 days prior to study entry (hydroxyurea should be discontinued ≥24 hours prior to initiation of study drug) * Requiring concomitant treatment with drugs that are cytidine deaminase (CDA) substrates and/or inhibitors, e.g., cytarabine, 5-azacytidine, gemcitabine * Currently pregnant or breastfeeding. Females of childbearing potential must have a negative serum pregnancy test within 72 hours of treatment start. * Uncontrolled intercurrent illness that could limit life expectancy or ability to complete study correlates * Women of Childbearing Potential (WOCBP) who are unwilling to agree to use dual contraceptive measures (i.e., hormonal or barrier method of birth control; abstinence, condom) prior to study entry, for the duration of study participation, and until 6 months after taking the last dose of THU/decitabine * Sexually active male who is unwilling to use a condom when engaging in any sexual contact with a WOCBP, beginning at the screening visit and continuing until 6 months after taking the last dose of THU/decitabine * 9\. Patients with uncontrolled active human retrovirus (HIV) infection, as this will further increase the risk for opportunistic infections. However, patients with HIV with undetectable viral load by polymerase chain reaction (PCR), without opportunistic infection, and on a stable regimen of antiretroviral therapy are eligible

Design outcomes

Primary

MeasureTime frameDescription
White blood cell measurementevery 4 weeksMeasure neutrophils count
Platelet countevery 4 weekMeasure platelets in the blood

Secondary

MeasureTime frameDescription
Response for high-risk MDSevery 4 weeksMeasure using International Working Group (IWG) 2023 response criteria
Hospitalizationevery 4 weeksRecord the number of days of hospitalization

Countries

United States

Contacts

Primary ContactDavina Hoban
dhoban@montefiore.org201-618-4725

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026