Clinical Trials /

AZD6738 for Patients With Progressive MDS or CMML



This research study is studying a research drug called AZD6738 as a possible treatment for Myelodysplastic Syndrome or Chronic Myelomonocytic Leukemia .

Related Conditions:
  • Chronic Myelomonocytic Leukemia
  • Myelodysplastic Syndromes
Recruiting Status:



Phase 1

Trial Eligibility



  • Brief Title: AZD6738 for Patients With Progressive MDS or CMML
  • Official Title: A Phase Ib Study of AZD6738 for Patients With Myelodysplastic Syndrome or Chronic Myelomonocytic Leukemia Progressing on Front-Line Therapy

Clinical Trial IDs

  • ORG STUDY ID: 18-477
  • NCT ID: NCT03770429


  • Leukemia
  • Myelodysplastic Syndrome




This research study is studying a research drug called AZD6738 as a possible treatment for Myelodysplastic Syndrome or Chronic Myelomonocytic Leukemia .

Detailed Description

      This is a Phase Ib clinical trial. A Phase I clinical trial tests the safety of an
      investigational drug and also tries to define the appropriate dose of the investigational
      drug to use for further studies. "Investigational" means that the drug is being studied.

      The FDA (the U.S. Food and Drug Administration) has not approved AZD6738 as a treatment for
      any disease.

      AZD6738 is a a drug being studied as a potential treatment for individuals with
      Myelodysplastic Syndrome or Chronic Myelomonocytic Leukemia. It targets a specific pathway in
      cells that repairs damage to DNA, specifically by blocking a protein called ATR. ATR notices
      when there is injury to DNA, which is the blueprint that allows cells to function and
      replicate, and works to repair that damage. Studies done in a laboratory setting and cell
      lines suggest that MDS and CMML cells rely specifically on the ATR pathway to fix DNA damage
      and survive; by inhibiting ATR with AZD6738, MDS or CMML cells appear to selectively
      accumulate DNA damage and die, but healthy cells appear to be less sensitive to this target.
      This suggests that inhibiting ATR may be a way to selectively target MDS or CMML cells.

      In this research study, the investigators are looking to first investigate the safety and
      tolerability of AZD6738. The investigators will also evaluate whether AZD6738 has any effect
      on tumor growth, measure the activity of AZD6738 in the bone marrow, and study how AZD6738 is
      cleared by the body.

Trial Arms

AZD6738ExperimentalPatients will receive AZD6738 orally on a 28-day cycle
  • AZD6738

Eligibility Criteria

        Inclusion Criteria

        Patients must have a diagnosis of recurrent, persistent, or progressive myelodysplastic
        syndrome (MDS) or chronic myelomonocytic leukemia (CMML) according to WHO 2016 diagnostic

          -  For patients with higher-risk MDS (Intermediate, High, or Very High by IPSS-R, score
             >3.5), they must have been unresponsive to 4 cycles of decitabine or 6 cycles of
             azacitidine, progressed on any prior HMA, or intolerant of prior treatment with either
             azacitidine or decitabine (HMA) chemotherapy.

          -  For patients with CMML, they must have received prior HMA chemotherapy and have been
             unresponsive to, progressed on, or be intolerant of this therapy; or those who decline
             or are not felt to be candidates for HMA chemotherapy.

          -  Patients with MDS or CMML that has recurred after prior allogeneic stem cell

          -  For patients with lower-risk MDS (Low or Intermediate by IPSS-R, score ≤ 3.5, or any
             score post-HMA), they must be transfusion-dependent according to IWG criteria and must
             either be unresponsive to/progressed after prior ESA therapy or have an erythropoietin
             level > 500 U/L, who are not felt to be candidates for or lack other treatment

          -  Female and male patients aged ≥ 18 years.

          -  ECOG performance status ≤2.

          -  All participants must have adequate organ and marrow function as defined below within
             21 days prior to study enrollment:

          -  Total bilirubin < 1.5 mg/dL unless due to Gilbert's (<3.0 mg/dL)

          -  AST(SGOT)/ALT(SGPT) ≤ 2.5 × institutional upper limit of normal

          -  INR < 1.5x ULN

          -  Creatinine clearance (estimated GFR) ≥45 mL/min/1.73 m2 as measured by the
             Cockroft-Gault formulation

          -  Patients enrolled on Part 1 (Dose Finding) of the study need not have splicing factor
             mutation status known at the time of enrollment but local testing must be initiated or
             a sample appropriately stored for future testing prior to receiving drug.

          -  Patients enrolled during Part 2 (Dose Expansion) of the study must have the results of
             splicing factor mutation testing, per local testing practices, prior to enrollment.
             Assessment can be performed at any time at or after MDS/CMML diagnosis.

          -  Part 2 patients enrolled on the splicing factor mutated arm must have at least one of
             the following mutations:

        SF3B1: E622 Y623 R625 N626 H662 T663 K666 K700 V701 I704 G740 K741 G742 A774 D781 U2AF1:
        S34 R156 Q157 SRSF2: P95 Deletion including amino acid P95 ZRSR2 Any frameshift or nonsense

          -  Part 2 patients enrolled on the splicing factor wildtype arm should lack the above
             mutations according to local testing. If patients have an alteration in a splicing
             factor that is not listed they would be included in the wildtype arm.

          -  Eligible patient are not currently considered candidates for, or have declined, stem
             cell transplantation at the time of enrollment.

          -  The effects of AZD6738 on the developing human fetus are unknown. For this reason and
             because agents that inhibit ATR may be teratogenic, women of child-bearing potential
             and men must agree to use adequate contraception (hormonal or barrier method of birth
             control; abstinence) prior to study entry, for the duration of study participation,
             and for 6 months after the last dose of a study drug.

               -  Females must not be breast feeding and must have a negative pregnancy test prior
                  to start of dosing if of child-bearing potential or must have evidence of
                  non-child-bearing potential by fulfilling one of the following criteria at

                    -  Post-menopausal defined as aged more than 50 years and amenorrhoeic for at
                       least 12 months following cessation of all exogenous hormonal treatments.

                    -  Documentation of irreversible surgical sterilisation by hysterectomy,
                       bilateral oophorectomy or bilateral salpingectomy but not tubal ligation.

                    -  Amenorrhoeic for 12 months and serum follicle-stimulating hormone (FSH),
                       luteinizing hormone (LH) and plasma oestradiol levels in the postmenopausal
                       range for the institution.

               -  Men treated or enrolled on this protocol must also agree to use adequate
                  contraception prior to the study, for the duration of study participation, and
                  for 1 week after the last study drug administration. Sexually active male
                  patients must be willing to use barrier contraception i.e., condoms with all
                  sexual partners. Where the sexual partner is a 'woman of child-bearing potential'
                  who is not using effective contraception, men must use a condom (with spermicide)
                  during the study and for 6 months after the last dose of a study drug.

          -  Ability to swallow and retain oral medication.

          -  Ability to understand and the willingness to sign a written informed consent document.
             Provision of informed consent should occur prior to any study-specific procedures.

        Exclusion Criteria

          -  Involvement in the planning and/or conduct of the study (applies to both Investigator
             staff and/or staff at the study site).

          -  Previous enrollment in the present study.

          -  Participants with a diagnosis of ataxia telangiectasia.

          -  Participants who have had systemic chemotherapy within 21 days or five half lives of
             the medications used, whichever is longer, prior to entering the study.

             • Hydroxyurea is allowed if necessary for count control.

          -  Patients who have received treatment with a small molecule investigational medicinal
             product (IMP) within 21 days or five half-lives (or 42 days for biologics), whichever
             is longer, prior to first dose of study drug.

          -  Participants who have undergone major surgery within 28 days before first dose of
             study drug.

          -  Participants who, with the exception of alopecia, have not recovered from any adverse
             events ≥ Common Terminology Criteria for Adverse Events (CTCAE) grade 2, unless those
             toxicities are deemed irreversible and unlikely to interfere with participation on the
             study per the treating investigator.

          -  Participants who have had a prior allogeneic transplant must be at least 100 days out
             from transplant "day 0" and off systemic immunosuppressive therapy without active
             grade > 1 GVHD requiring more than 10mg prednisone/day or equivalent.

          -  Patients receiving systemic corticosteroids may not be on a dose of > 10mg
             prednisone/day or equivalent up to 14 days prior to first dose of study drug.

          -  Participants who are currently receiving any other investigational agents.

          -  Participants with a diagnosis of/progression to acute myeloid leukemia, per WHO 2016
             diagnostic criteria.

          -  Active CNS involvement of leukemia; evaluation (e.g. lumbar puncture) is not necessary
             in absence of clinical suspicion.

          -  Participants with a known hypersensitivity to AZD6738 or any excipient of the product.

          -  Hematuria +++ on microscopy or dipstick.

          -  Participants with prior exposure to an ATR or other DDR inhibitor.

          -  Participants may not be receiving any medications or substances that are potent
             inhibitors or inducers of CYP3A4.

               -  There is a required wash-out period of 5 half-lives from such agents prior to
                  starting AZD6738, or three weeks for St. John's Wort.

               -  For non-potent inhibitors or inducers of CYP3A4, the decision to allow a patient
                  to enroll on the study will be made on a case-by-case basis with the Investigator
                  and the Overall PI. Note these include common azole antifungals, macrolide
                  antibiotics, and other medications listed in the concomitant medications section.
                  As part of the enrollment/informed consent procedures, the patient will be
                  counseled on the risk of interactions with other agents, and what to do if new
                  medications need to be prescribed or if the patient is considering a new
                  over-the-counter medicine or herbal product.

               -  Exposure of other drugs metabolised by CYP3A4 and/or CYP2B6 may be reduced and
                  additional monitoring may be required (see Appendix G).

               -  The use of herbal supplements or 'folk remedies' (and medications and foods that
                  significantly modulate CYP3A activity) should be discouraged. If deemed
                  necessary, such products may be administered with caution and the reason for use
                  documented in the CRF (see Appendix G).

          -  Uncontrolled intercurrent illness including, but not limited to, serious and active
             uncontrolled infection, symptomatic congestive heart failure, active inflammatory
             bowel disease, unstable respiratory or cardiac conditions, unstable angina pectoris,
             unstable cardiac arrhythmia, active bleeding diathesis (e.g. haemophilia or von
             Willebrand disease), uncontrolled seizures, or psychiatric illness/social situations
             that would limit compliance with study requirements.

          -  Any of the following cardiac diseases currently or within the last 6 months:

               -  Unstable angina pectoris or acute myocardial infarction.

               -  Congestive heart failure (NYHA ≥ Class 2) or known reduced LVEF < 50%.

               -  Unstable conduction abnormality not controlled with pacemaker or medication e.g.
                  third-degree heart block.

               -  Unstable ventricular or supraventricular arrhythmias (patients with chronic
                  controlled atrial arrhythmias in the absence of other cardiac abnormalities are

               -  Symptomatic carotid stenosis, TIA, haemorrhagic or thrombotic stroke.

               -  Cardiac procedures such as CABG, angioplasty or vascular stenting within 6 months
                  of dosing.

          -  Patients with relative hypotension (<90/60 mmHg) or clinically relevant orthostatic
             hypotension, including fall in blood pressure of > 20 mm Hg.

          -  Resting corrected QT interval (QTc) >470 msec for females and >450 for males
             (Fredericia formula). Patients with known factors that increase the risk of QTc
             prolongation such as a personal/immediate family history of long QT syndrome are

          -  Active untreated or concurrent malignancy that is distinct in primary site or
             histology, excluding: non-melanoma skin cancer, noninvasive colonic polyps,
             superficial bladder tumors, cervical cancer in-situ, ductal carcinoma in situ of the
             breast, monoclonal B-cell lymphocytosis, or monoclonal gammopathy of undetermined
             significance. Patients may be receiving maintenance hormonal therapy for prior breast
             or prostate cancer. Other malignancies that were treated with curative intent at least
             3 years prior to study screening and without evidence of active disease will be

          -  Female patients who are pregnant, breast-feeding or male or female patients of
             reproductive potential who are not employing an effective method of birth control.
             Pregnant women are excluded from this study because AZD6738 is chemotherapy agent with
             the potential for teratogenic or abortifacient effects. Because there is an unknown
             but potential risk for adverse events in nursing infants secondary to treatment of the
             mother with AZD6738, breastfeeding should be discontinued if the mother is treated.

          -  HIV-positive participants, including those on combination antiretroviral therapy, are
             ineligible, both because of the potential for pharmacokinetic interactions with
             AZD6738, as well as an increased risk of lethal infections when treated with
             marrow-suppressive therapy. Screening for patients without suspected disease is not
             required. Appropriate studies will be undertaken in participants receiving combination
             antiretroviral therapy when indicated.

          -  Patients who are known to have active infection with hepatitis B or hepatitis C based
             on serologic status. Screening for patients without suspected disease is not required.
             Patients treated with viral suppression are eligible.

          -  Patients who have been vaccinated with live, attenuated vaccines within 4 weeks of
             first dose of study drug.

          -  Refractory nausea and vomiting, chronic gastrointestinal diseases or previous
             significant bowel resection, with clinically significant sequelae that would preclude
             adequate absorption of AZD6738
Maximum Eligible Age:N/A
Minimum Eligible Age:18 Years
Eligible Gender:All
Healthy Volunteers:No

Primary Outcome Measures

Measure:Safety of AZD6738 in MDS and CMML (Incidence of dose limiting toxicities)
Time Frame:2 years
Safety Issue:
Description:Incidence of dose limiting toxicities within the first 28 days of treatment, and enumeration of treatment emergent adverse events graded according to CTCAE

Secondary Outcome Measures

Measure:Overall Response Rate - splicing factor MUT
Time Frame:2 years
Safety Issue:
Description:We will determine the ORR (CR, mCR, PR, HI) as well as stable disease and progressive disease among patients with splicing factor mutations.
Measure:Overall Response Rate - splicing factor WT
Time Frame:2 years
Safety Issue:
Description:We will determine the ORR (CR, mCR, PR, HI) as well as stable disease and progressive disease among patients without splicing factor mutations.
Measure:Classification of Toxicity
Time Frame:2 years
Safety Issue:
Description:We will describe the frequency and severity of adverse events during treatment.
Measure:Overall Survival Rate
Time Frame:2 years
Safety Issue:
Description:Proportion of patients alive at 1 year
Measure:Progression Free Survival Rate
Time Frame:2 years
Safety Issue:
Description:Proportion of patients alive without disease progression at 1 year


Phase:Phase 1
Primary Purpose:Interventional
Overall Status:Recruiting
Lead Sponsor:Massachusetts General Hospital

Trial Keywords

  • Leukemia
  • Myelodysplastic Syndrome

Last Updated

January 14, 2021