Recruiting

Early Phase 1

Observational StudyEarly Intervention in High Risk CCUS

Sponsor:

Lachelle D. Weeks, MD, PhD

Code:

NCT06802146

Conditions

Clonal Cytopenia of Undetermined Significance

Cytopenia

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

Inqovi

Study Details

Brief summary:

This research is being done to find out more about the potential risks and benefits of early treatment in participants with high risk Clonal Cytopenia of Unknown Significance (CCUS). This study will give eligible CCUS participants the option of either being observed or taking an oral drug as treatment.

The names of the study drug involved in this study is:

-Decitabine/cedazuridine (DEC/CED) (a nucleoside metabolic inhibitor and cytidine deaminase inhibitor).

Conditions

Clonal Cytopenia of Undetermined Significance

Cytopenia

Study ID

NCT06802146

Start date

Feb 7, 2025

Status verified date

Apr, 2026

Completion date

Dec 1, 2028

Anticipated

Primary completion date

Dec 1, 2026

Anticipated

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

Age ≥18 years.
Unexplained cytopenia(s) for at least 4 months (at least two separate labs within 4 months including at time of screening must meet this criteria). Cytopenia(s) defined as the presence of ≥ 1 of the following:

Hemoglobin (Hgb) <12 g/dL for women and <13g/dL for men
Absolute neutrophil count (ANC) < 1.8 × 109/L\*
Platelet count (Plt) <150 × 109/L \*Patients known to have a Duffy-null genotype must have anemia (Hgb < 12g/dL for women, Hgb <13g/dL for men) and/or thrombocytopenia (Plt < 150 × 109/L) to be eligible for this study.

1 pathogenic variant detected in any myeloid driver gene with a VAF of at least 0.02 (2%) identified by local next generation sequencing (NGS) of peripheral blood or bone marrow sample within 3 months from screening bone marrow biopsy.
Participants must have a high risk score per the Clonal Hematopoiesis Risk Calculator (CHRS). See APPENDIX C for calculation.
Screening bone marrow biopsy must not be diagnostic of any overt hematologic malignancy by morphologic assessment and must be consistent with a diagnosis of clonal cytopenia of unknown significance (CCUS) as determined by multi-institutional hematopathology review.
ECOG performance status 0-2 (see Appendix A).
Participants must meet the following organ function as defined below:

Serum aspartate aminotransferase/serum glutamic oxaloacetic transaminase (AST/SGOT) and alanine aminotransferase (ALT/SGPT) ≤3x upper limit of normal (ULN).
Serum total bilirubin <1.5x ULN. Higher levels are acceptable if these can be attributed to ineffective erythropoiesis or Gilbert's syndrome. In these cases, approval from the study Sponsor-Investigator is required.
Creatinine clearance greater than 40 mL/min based on the Cockcroft-Gault glomerular filtration rate estimation.
Ability to understand and the willingness to sign a written informed consent document.
For participants of the early pharmacologic intervention cohort: women of childbearing potential must use highly effective contraception during treatment for at least 6 months after the last dose and males with female partners of reproductive potential should use effective contraception during treatment and for 3 months after the last dose.

Exclusion Criteria:

Concurrent primary malignancy requiring active cytotoxic chemotherapy and/or ionizing radiation therapy.
Known inherited bone marrow failure disorder and/or germline predisposition to hematologic malignancy.
Receipt of anti-cancer therapy including any cytotoxic chemotherapy, ionizing radiation therapy, immunomodulatory agents such as lenalidomide, and targeted anti-cancer therapies including PARP inhibitors within the last 6 months. Patients with complete surgical resection of a tumor are not excluded from this study.
Anti-cancer therapy, including any cytotoxic chemotherapy, ionizing radiation therapy, immunomodulatory agents such as lenalidomide and targeted agents such as PARP inhibitors, planned in the next 6 months. Patients on hormonal adjuvant therapy for nonmetastatic breast and prostate cancer or other minimally-myelosuppressive maintenance therapies for non-metastatic cancer may be eligible at the discretion of the study PI.
Diagnosis of MDS, MPN, CMML, AML or any other hematolymphoid malignancy in the patient's lifetime. This includes individuals with MDS-defining chromosomal abnormalities identified via conventional karyotype or FISH.
Presence of a concurrent hematologic malignancy precursor state, such as smoldering multiple myeloma (SMM), and smoldering Waldenstrom's macroglobulinemia.
Presence of an early-stage hematologic precursor state-such as monoclonal gammopathy of undetermined significance (MGUS) and monoclonal B cell lymphocytosis (MBL).
Active uncontrolled systemic fungal, bacterial, or viral infection (defined as ongoing signs/symptoms related to the infection without improvement despite appropriate antibiotics, antiviral therapy, and/or other treatment).
Recent (within 3 months) vaccination with any live attenuated vaccine or vaccination with live attenuated vaccine planned during the next 15 months. \*Live attenuated vaccines include measles, mumps, rubella (MMR combined vaccine), rotavirus, smallpox, chickenpox, and yellow fever.
Laboratory evidence indicative of clinically significant red cell hemolysis.
Hypersplenism and/or evidence of portal hypertension on physical exam or imaging.
Pregnant or lactating.

Study Design

Enrollment

108 participants

Anticipated

Allocation

Non randomized

Intervention Model

Parallel Assignment

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Inqovi Cohort

Participants will be enrolled and will complete:

Baseline visit.
In-clinic visits with assessments: Cycle 1 days 8, 15, and 22.
In-clinic visits with assessments and bone marrow biopsies: Cycles 2 - 12 Day 1.
Cycle 1 - 12:

• Days 1 - 5 of 28 day cycle: Predetermined dose of Inqovi 1x daily.

End of Treatment visit, Cycle 13 Day 1, with assessments and bone marrow biopsy.
Follow up in-clinic visits with assessments: Cycle 19 Day 21, Cycle 25 Day 1, Cycle 31 Day 1, and Cycle 36 Day 28. Bone marrow biopsy at Cycle 25 Day 1.
End of Study visit, Cycle 36 Day 28, with assessments and bone marrow biopsy.

no intervention: Observational Cohort

Participants will complete:

Baseline visit.
In-clinic visits with assessments: Cycle 7 Day 1, Cycle 13 Day, Cycle 19 Day, Cycle 25 Day 1, and Cycle 31 Day 1.
Bone marrow biopsies every 12 months at Cycle 13 Day 1 and Cycle 25 Day.
End of study visit, Cycle 36 Day 28, with assessments and bone marrow biopsy.

Interventions

Inqovi

Combination of a nucleoside metabolic inhibitor and cytidine deaminase inhibitor, 10mg DEC / 100mg CED tablet, taken orally per protocol.

Primary outcome measure

Feasibility Failure Rate (FFR) [ Time Frame: Treatment duration up to 12 cycles (28 days per cycle). ]

Central Contacts and Locations

Central contacts

Lachelle Weeks, MD

617-632-3779 Lachelle_Weeks@DFCI.HARVARD.EDU

Locations

Dana-Farber Cancer Institute

Recruiting

Boston, Massachusetts, United States, 02215

Contacts

Lachelle Weeks, MD

617-632-3779 Lachelle_Weeks@DFCI.HARVARD.EDU

Principal Investigator:

Lachelle Weeks, MD

More Information

Sponsor

Lachelle D. Weeks, MD, PhD

Last update posted

Apr 23, 2026

Last verified

Apr, 2026

Keywords

Clonal Cytopenia of Undetermined Significance
CCUS
Cytopenia

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Lachelle D. Weeks, MD, PhD on 2026-04-23.