A Study of Enasidenib in People With Clonal Cytopenia of Undetermined Significance

Completed · Phase 1

Conditions studied: Clonal Cytopenia of Undetermined Significance, CCUS Clonal Cytopenia of Undetermined Significance

In brief

Study researchers think that a drug called enasidenib may help people with clonal cytopenia of undetermined significance (CCUS) because the drug blocks the mutated IDH2 protein, which may improve blood cell counts. The purpose of this study is to find out whether enasidenib is a safe and effective treatment for CCUS.

Key facts

Study ID

NCT05102370

Run by

Memorial Sloan Kettering Cancer Center

People needed

4

Starts

2021-10-06

Expected to finish

2026-01-26

Last updated by the study team

2026-01-27

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age ≥18 years at the time of signing the informed consent form.
• Willing and able to adhere to the study visit schedule and other protocol requirements.
• Unexplained cytopenia for at least 6 months. Cytopenia is defined as the presence of ≥1 blood count indexes below the following thresholds:
• Hgb <10 g/dL
• ANC <1.8 × 10\^9/L
• Platelets <100 × 10\^9/L
• Results of bone marrow biopsy within 1 month of study entry (screening bone marrow biopsy) must not indicate hematologic disease.
• IDH2 gene mutation (R140 or R172), performed locally, at a frequency >2%.
• ECOG performance status of 0-2.
• Adequate organ function, defined as:
• Serum aspartate aminotransferase/serum glutamic oxaloacetic transaminase (AST/SGOT) and alanine aminotransferase (ALT/SGPT) ≤3x upper limit of normal (ULN), unless the subject has Gilbert's syndrome.
• Serum total bilirubin <1.5x ULN. Higher levels are acceptable if these can be attributed to ineffective erythropoiesis. In these cases, approval from the study Principal Investigator is required.
• Creatinine clearance greater than 50 mL/min based on the Cockroft-Gault glomerular filtration rate estimation.
• Patients being enrolled on study on the basis of anemia, will only be eligible if folate, B12, serum iron, serum ferritin, total iron binding capacity, haptoglobin and peripheral smear within normal limits
• Women of childbearing potential may participate provided they have a negative serum pregnancy test at screening and a negative serum or urine pregnancy test within 72 h of starting treatment.
• Women of childbearing potential (WOCBP) and males with partners who are WOCBP must agree to abstain from sexual intercourse or to use 1 highly effective form of contraception during the study and for at least 4 months following the last dose of enasidenib. Males with partners who are WOCBP must agree to use a barrier method.

You may not qualify if…

• Active malignancy defined as >1-cm disease on most recent CT scan in the past 6 months or recent history of cancer (i.e. within the past 5 years) with >50% chance of cancer recurrence in the next 5 years.
• Current or prior history of hematologic malignancy.
• Therapy (including maintenance therapy) for solid-tumor malignancy within the last 6 months.
• Known dysphagia, short-gut syndrome, gastroparesis, or other conditions that limit the ingestion or gastrointestinal absorption of drugs administered orally.
• 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).
• Positive direct Coombs test
• Evidence of hypersplenism on physical exam
• Pregnant or lactating (women).

Where it is running

• Mayo Clinic (Data Collection Only) — Rochester, Minnesota, United States
• Washington University (Data Collection and Specimen Analysis) — St Louis, Missouri, United States
• Memorial Sloan Kettering at Basking Ridge (All Protocol Activities) — Basking Ridge, New Jersey, United States
• Memorial Sloan Kettering Monmouth (All protocol activities) — Middletown, New Jersey, United States
• Memorial Sloan Kettering Bergen (Limited protocol activities) — Montvale, New Jersey, United States
• Memorial Sloan Kettering Suffolk-Commack (Limited protocol activities) — Commack, New York, United States
• Memorial Sloan Kettering Westchester (All Protocol Activities) — Harrison, New York, United States
• Memorial Sloan Kettering Cancer Center (All Protocol Activities) — New York, New York, United States
• Memorial Sloan Kettering Nassau (Limited protocol activities) — Rockville Centre, New York, United States
• Cleveland Clinic (Data Collection Only) — Cleveland, Ohio, United States
• Ohio State University (Data Collection Only) — Columbus, Ohio, United States
• Oregon Health & Science University (Data Collection Only) — Portland, Oregon, United States

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.