Venetoclax in Combination With ASTX727 for the Treatment of Treatment-Naive High-Risk Myelodysplastic Syndrome or Chronic Myelomonocytic Leukemia

  • End date
    Jul 20, 2026
  • participants needed
  • sponsor
    M.D. Anderson Cancer Center
Updated on 17 September 2023
chronic myelomonocytic leukemia
myelomonocytic leukemia


This phase I/II trial studies the side effects and best dose of venetoclax in combination with cedazuridine and decitabine (ASTX727) in treating patients with high risk myelodysplastic syndrome or chronic myelomonocytic leukemia who have not received prior treatment (treatment-naive). Chemotherapy drugs, such as venetoclax, cedazuridine, and decitabine, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading.



I. To determine the safety and tolerability (phase 1) and overall response rate (ORR) (phase 2) of venetoclax in combination with ASTX727 in patients with treatment-naive high-risk myelodysplastic syndrome (MDS) or chronic myelomonocytic leukemia (CMML) with bone marrow excess blasts > 5%.


I. Rate of complete remission (CR). II. Rate of marrow/morphologic complete remission (mCR). III. Rate of hematologic improvement (HI; erythroid/platelet/neutrophil responses).

IV. Rate of red blood cell (RBC) transfusion independence. V. Rate of platelet (PLT) transfusion independence. VI. Rate of cytogenetic response. VII. Rate of bone marrow blast response. VIII. Time to transformation to acute myeloid leukemia (AML). IX. Duration of response (DOR). X. Overall survival (OS). XI. Progression-free survival (PFS). XII. Disease-free survival (DFS). XIII. Time to next MDS treatment (TTNT). XIV. Event-free survival (EFS).


I. To investigate the effects of therapy on MDS and to identify biological markers of response to venetoclax and/or its combination with ASTX727.

OUTLINE: This is a phase I, dose-escalation study of venetoclax, followed by a phase II study.

Patients receive venetoclax orally (PO) once daily (QD) on days 1-14. Patients also receive ASTX727 PO QD on days 1-5. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up every 3-6 months for up to 5 years.

Condition Chronic Myelomonocytic Leukemia, Myelodysplastic Syndrome
Treatment venetoclax, Decitabine and Cedazuridine
Clinical Study IdentifierNCT04655755
SponsorM.D. Anderson Cancer Center
Last Modified on17 September 2023


Yes No Not Sure

Inclusion Criteria

Patients with treatment-naive high-risk (HR)-MDS or CMML (intermediate [Int]-2 or high risk by the International Prognostic Scoring System [IPSS] with overall score >= 1.5) with excess blasts > 5\. Note: Patients with therapy-related MDS are eligible. Hydroxyurea is allowed to lower the white cell count =< 10,000/ul prior to initiation of venetoclax
Total bilirubin < 3 x upper limit of normal (ULN) unless increase is due to Gilbert's disease or leukemic involvement
Alanine aminotransferase (ALT)/aspartate aminotransferase (AST) < 3.0 x ULN unless considered due to leukemic involvement
Creatinine < 2 x ULN unless related to the disease
Signed written informed consent
Females must be surgically or biologically sterile or postmenopausal (amenorrheic for at least 12 months) or if of childbearing potential, must have a negative serum or urine pregnancy test within 72 hours before the start of the treatment. Women of childbearing potential must agree to use an adequate method of contraception during the study and until 3 months after the last treatment
Males must be surgically or biologically sterile or agree to use an adequate method of contraception during the study until 3 months after the last treatment
Age >= 18 years of age

Exclusion Criteria

Patients having received any prior BCL2 inhibitor therapy
Patients with MDS with IPSS risk categories low or Int-1 (overall IPSS score < 1.5)
Patient with known human immunodeficiency virus (HIV) infection (due to potential drug-drug interactions between antiretroviral medications and venetoclax). HIV testing will be performed at screening, only if required per local guidelines or institutional standards
Patient known to be positive for hepatitis B or C infection (hepatitis C virus antibody [HCV Ab] indicative of a previous or current infection; and/or positive hepatitis B surface antigen [HBs Ag] or detected sensitivity on hepatitis B virus-deoxyribonucleic acid [HBV-DNA] polymerase chain reaction [PCR] test for hepatis B core antibody [HBc Ab] and/or HBs Ab positivity) with the exception of those with an undetectable viral load within 3 months of screening. (Hepatitis B or C testing is not required). Subjects with serologic evidence of prior vaccination to HBV [i.e., HBs Ag-, and anti-HBs+] may participate
Patient has received strong and/or moderate CYP3A inducers within 7 days prior to the initiation of study treatment
Patient has consumed grapefruit, grapefruit products, Seville oranges (including marmalade containing Seville oranges) or Starfruit within 3 days prior to the initiation of study treatment
Patient has a cardiovascular disability status of New York Heart Association class > 2\. Class 2 is defined as cardiac disease in which patients are comfortable at rest but ordinary physical activity results in fatigue, palpitations, dyspnea, or anginal pain
Patient has chronic respiratory disease that requires continuous oxygen, or significant history of renal, neurologic, psychiatric, endocrinologic, metabolic, immunologic, hepatic, cardiovascular disease, any other medical condition or known hypersensitivity to any of the study medications including excipients of azacitidine that in the opinion of the investigator would adversely affect his/her participating in this study
Patient has a malabsorption syndrome or other condition that precludes enteral route of administration
Patient exhibits evidence of other clinically significant uncontrolled systemic infection requiring therapy (viral, bacterial or fungal)
Patient has received a live attenuated vaccine within 4 weeks prior to the first dose of study drug
Patient has a history of other malignancies within 2 years prior to study entry, with the exception of
Adequately treated in situ carcinoma of the cervix uteri or carcinoma in situ of breast
Basal cell carcinoma of the skin or localized squamous cell carcinoma of the skin
Previous malignancy confined and surgically resected (or treated with other modalities) with curative intent; requires discussion with TA MD
Patient has a white blood cell count > 25 x 10^9/L. (Hydroxyurea or leukapheresis are
Female subject has positive results for pregnancy test
permitted to meet this criterion)
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