ClinicalTrials.gg
RecruitingNCT04988555Updated Mar 24, 2026

A Phase 1/2 Study of Enzomenib (DSP-5336) in Patients With Acute Leukemia (Horizen-1)

A Phase 1/2 interventional study of Enzomenib and azoles in Leukemia, Myeloid, Acute, Leukemia, Lymphocytic, Acute and Multiple Myeloma, sponsored by Sumitomo Pharma America, Inc.. Recruiting at 104 sites in 12 countries. Open to participants aged 12 Years and older. Per ClinicalTrials.gov, last updated 2026-03-24.

Sponsored by Sumitomo Pharma America, Inc. (part of Sumitomo Pharma Co., Ltd.) · Phase 1/2, Interventional, and Treatment

From the registry’s dates

  • Started Feb 2022; still recruiting 4 years 8 months later.
Phase
Phase 1/2
Study type
Interventional
Enrollment
606
Allocation
Non-randomized
Ages
12 Years and older
Sex
All
01

Study summary

A phase 1/2 dose escalation / dose expansion study of Enzomenib (DSP-5336) in patients with acute leukemia.

Read the detailed description

DSP-5336-101 is a phase 1/2 open-label, dose escalation, dose expansion study in which the safety, PK, pharmacodynamics, and clinical activity of orally administered DSP-5336 will be evaluated in patients with relapsed or refractory AML, ALL, or acute leukemia of ambiguous lineage, and in selected sites and regions, in adult patients with high-risk relapsed or refractory MDS or relapsed MM.

Additionally, the safety and clinical activity of orally administered DSP-5336 will be evaluated in combination with Standard-of-Care (SOC) AML treatments including: (a) the SOC nonintensive regimen (venetoclax + azacitidine) or (b) the SOC intensive regimen (cytarabine + daunorubicin induction, 7+3) in patients with newly diagnosed AML who have MLLr or NPM1m.

02

Conditions studied

  • Leukemia, Myeloid, Acute
  • Leukemia, Lymphocytic, Acute
  • Multiple Myeloma
  • Myelodysplastic Syndromes

Keywords

  • Relapsed or refractory AML
  • MLLr
  • Menin
  • NPM1m
  • KMT2A
  • MDS
  • MM
03

In context

Leukemia, Myeloid, Acute

3,667 studies on the registry are indexed under Leukemia, Myeloid, Acute; 816 are open to participants now.

This study's planned enrollment of 606 is above the median of 40 across 3,005 interventional studies indexed under Leukemia, Myeloid, Acute.

Browse Leukemia, Myeloid, Acute studies →

Lead sponsor

Sumitomo Pharma America, Inc. is the lead sponsor of 181 studies on the registry; 5 are open to participants now.

Of its 33 completed or terminated interventional studies of FDA-regulated products, 21 (64%) have results posted.

First submitted after Sumitomo Pharma America, Inc. became part of Sumitomo Pharma Co., Ltd..

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
12 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

For patients in Phase I:

  1. Have a diagnosis of AML, ALL or acute leukemia of ambiguous lineage according to World Health Organization (WHO) 2022 classification, or, in selected sites and regions, a diagnosis of MDS or MM as determined by pathology review at the treating institution, and whose disease has progressed after available standard therapies known to be active for their AML, ALL, or acute leukemia of ambiguous lineage or, in selected sites and regions, for MM or MDS. If acute leukemia patients are transformation from MDS or other hematologic , patients need to receive available standard therapies as acute leukemia after AML transformation and before enrolling this trial. In regions or countries where required by regulatory authorities, participants must have a documented KMT2A (MLL) fusion or NPM1 mutation, including those with coexisting FLT3 genomic alterations and/or IDH1/2 mutation. Participants who are candidates for stem cell transplantation must have been offered this therapeutic option.

    For patients with MDS (selected sites and regions):

    1. Patients with MDS must have bone marrow blasts ≥ 5%
    2. Patients with MDS must have relapsed or refractory disease and have exhausted available standard therapies including at least 2 cycles of treatment with HMA

      For patients with MM (selected sites and regions):

    3. Have a confirmed diagnosis of multiple myeloma according to International Myeloma Working Group (IMWG) 2016 classification (Kumar, 2016) and whose disease has progressed after treatment with a minimum of 3 prior anti-myeloma regimens including a proteasome inhibitor (PI), an immunomodulatory drug (IMiD), and an anti-CD38 monoclonal antibody (mAb); patients must not be candidates for available therapies with established clinical benefit
    4. Have as defined in the protocol
    5. Meet the laboratory parameters set in the protocol

      For patients with relapsed/refractory AML in the venetoclax and azacitidine combination cohort (in countries and sites where permitted):

    6. Have MLLr or NPM1m.

      For patients with relapsed/refractory AML in the gilteritinib combination cohort (in countries and sites where permitted):

    7. Have MLLr or NPM1m AND any of the following FLT3 mutations: FLT3-ITD, FLT3-TKD/D835 or FLT3-TKD/I836.

      For patients with relapsed/refractory AML with NPM1 enrolled in the RP2D confirmation cohort:

    8. Must have ≥5% blasts in bone marrow by morphologic assessment
    9. Must not have received prior treatment with a menin inhibitor

      For patients with newly diagnosed AML:

    10. Must have AML as defined by WHO 2022 criteria with a documented MLLr or NPM1m (patients with AML characterized by MLL partial tandem duplications, MLL deletions, or trisomy 11 are not eligible)
    11. Must not have received treatment for AML with the exception of hydroxyurea for control of white blood cell counts.

    For patients in Phase 2:

  2. Have a confirmed diagnosis of relapsed AML or ALL according to WHO 2022 classification, as determined by pathology review at the treating institution, and who have ≥5% blasts by morphologic assessment in the bone marrow. Patients with extramedullary disease or peripheral blasts as the only manifestation of relapse are not eligible. Patients must have received clinically applicable standard therapies with confirmed survival benefit. Patients must not have had prior exposure to a menin inhibitor.
  3. Have a documented KMT2A (MLL)-fusion assessed at relapse or immediately prior to the determination of refractory status. KMT2A genetic alterations other than fusions (eg, KMT2A-PTD, amplification, point mutation) are not permitted.

    For all patients:

  4. Be > 18 years of age. For countries and sites where approved, for DSP-5336 monotherapy, acute leukemia patients ≥12 years of age who weigh ≥40 kg may be enrolled.
  5. Have an (ECOG) performance status ≤2.
  6. For monotherapy, WBC below 30,000/μ at enrollment. For the combination arms, WBC count must be below 25,000/uL at enrollment and prior to starting treatment. (Hydroxyurea and for cytoreduction purposes are allowed prior to enrollment and during study treatment)
  7. Clearance of creatinine level ≥ 50 ml/min, assessed by the CPK-EPI formula (2021 version and Cystatin C not required)
  8. Total ≤1.5 the (ULN) (or ≤2.0 ULN for patients with known Gilbert's syndrome)
  9. (AST) ≤3.0 times ULN
  10. Alanine aminotransferase (ALT) ≤3.0 times ULN
  11. Any prior treatment-related toxicities resolved to Grade ≤1 prior to enrollment, with the exception of Grade ≤2 alopecia or neuropathy
  12. Be willing to attend study visits as required by the protocol
  13. Have an estimated ≥3 months, based on the investigator's assessment
  14. Females of must have a negative serum pregnancy test. Females of childbearing potential are defined as women who have (1) experienced menarche and have not undergone sterilization procedures (hysterectomy, or bilateral oophorectomy), or have (2) not experienced menopause as defined in the protocol.
  15. All men and all women of childbearing potential and male patients' partners who are women of childbearing potential are required to use a highly effective method of during the study and for 6 months (for females and males alike) after the last dose of study drug. Further guidelines noted in protocol.
  16. Have AML/ALL/MDS/MM bone marrow material suitable for genomic analysis of AML,ALL, MDS, or MM genetic alterations. Note: If a bone marrow material is insufficient, an alternative suitable tissue (ex: peripheral blood) must be provided.

Exclusion criteria

Exclusion Criteria:

  1. Has a (LVEF) \<50%, as determined by ECHO
  2. Histological diagnosis of acute promyelocytic leukemia
  3. Received systemic calcineurin inhibitors within 2 weeks prior to the first dose of DSP 5336
  4. Have abnormal ECGs at screening that are , such as ( >480 msec, with QTc corrected according to Fridericia's formula (QTcF). For clinical sites in the UK, have abnormal ECGs at screening that are clinically significant, such as QTc ≥470 msec and ≥450 msec with QTc corrected according to Fridericia's formula (QTcF), for females and males, respectively. In addition, patients with a history of prolonged QT syndrome or who are required to take therapies associated with QT-interval prolongation are excluded.

    Note: In case of bundle branch block, QT interval correction can be performed.

  5. Has an active and uncontrolled, bacterial, viral, or fungal infection requiring parenteral therapy. Note: Patients must be afebrile with negative blood cultures at least 72 hours prior to Cycle 1 Day 1.
  6. Receives concurrent sensitive substrates with a narrow safety window or strong inhibitors or inducers of /5, including specifically: ketoconazole, isavuconazole and itraconazole. Other antifungals that are used as standard of care to prevent or treat infections are permitted. If a patient is on one of the excluded azole class antifungals, he/she can be taken off or switched to a permitted azole 7 or more days prior to first dose, then the patient could be allowed on study (Arm B) with approval of the medical monitor.
  7. Had major surgery within 28 days prior to the first dose of DSP-5336
  8. Has active central nervous system leukemia (prophylactic intrathecal chemotherapy is allowed).
  9. Underwent or chimeric antigen receptor cell (CAR-T) therapy or other modified T-cell therapy within 60 days prior to the first dose of DSP-5336. For clinical sites in the UK, underwent CAR-T therapy or other modified T-cell therapy within 6 months prior to the first dose of DSP-5336.
  10. Received a donor lymphocyte infusion within 28 days prior to the first dose of DSP-5336, or receiving therapy post-HSCT at the time of screening, or with clinically active or GVHD requiring active medical intervention other than the use of topical for ongoing cutaneous GVHD
  11. Received antineoplastic agents (except hormonal therapies as adjuvant maintenance for breast or prostate cancers if a patient is taking before starting study treatment, and hydroxyurea given for controlling blast cells) or other treatment within 7 days or 5 half-lives, whichever is shortest, prior to the first dose of DSP-5336
  12. In the opinion of the treating investigator, have any concurrent conditions that could pose an undue medical hazard or interfere with interpretation of study results; these conditions include, but are not limited to: clinically significant non-healing or healing wounds; concurrent congestive heart failure ( Functional Classification Class III or IV; see Section 21.2); concurrent unstable angina; concurrent cardiac arrhythmia requiring treatment (excluding asymptomatic atrial fibrillation); recent (within the prior 6 months) myocardial infarction; acute coronary syndrome within the previous 6 months; significant pulmonary disease (shortness of breath at rest or on mild exertion), eg, due to concurrent severe obstructive pulmonary disease, concurrent hypertension not controlled with concomitant medication, or diabetes mellitus with more than 2 episodes of ketoacidosis in the prior 6 months
  13. Have a known detectable viral load for or , or evidence of surface antigen, all being indicative of active infection.

    For sites in Japan, Taiwan, and Korea only: Hepatitis B core (HBc) antibody or hepatitis B surface (HBs) antibody test should be performed if HBsAg is negative. If HBc antibody or HBs antibody test is positive, HBV DNA quantification test should be performed to confirm that HBV DNA is negative.

  14. Have severe dysphagia, short-gut syndrome, gastroparesis, or other conditions that limit the ingestion or gastrointestinal absorption of drugs administered orally, including the inability to swallow oral medication
  15. Have cognitive, psychological, or psychosocial impediment that would impair the ability of the patient to receive therapy according to the protocol, or adversely affect the ability of the patient to comply with the process, protocol, or protocol-required visits and procedures
  16. Are pregnant or breastfeeding or planning to become pregnant. Note: Patients who are breastfeeding may be enrolled if they interrupt breastfeeding prior to the first dose of any study drugs and do not feed the baby with breast milk expressed after receiving the first dose of any study drugs. Breastfeeding should not be resumed for at least 6 months after the last dose of study drug
  17. Have any history or complication of interstitial lung disease (for sites in Japan in Phase 1 dose escalation).

    For clinical sites in the EU, have a history of Grade ≥ 2 drug-induced interstitial lung disease or Grade ≥ 2 non-infectious pneumonitis within 6 months of starting study treatment.

  18. Have a history of Torsades de Pointes
  19. Received systemic calcineurin inhibitors within 4 weeks prior to the first dose of DSP-5336
  20. Have plasma cell leukemia (>2.0 x 109 /L plasma cells in blood by standard differential) (for patients with MM)
  21. For patients intending to enroll into the combination cohort with gilteritinib: Patients must be gilteritinib-naïve or sensitive and have not received a FLT3 inhibitor in the refractory setting (prior FLT3 inhibitor in front line therapy is allowed)
  22. Have a known intolerance of reaction to components of the investigational medicinal product
  23. For clinical sites in the UK: In Arm E (DSP-5336 + venetoclax/azacitidine), have received a within 30 days prior to the first dose of DSP-5336
Terms in these criteria, in plain language(26)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

CYP3A (CYP3A4) inhibitors and inducers

CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.

Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

GVHD (graft-versus-host disease)

After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
606 participants (estimated)

Study arms

  • Experimental
    Phase 1 - Arm A

    R/R acute leukemia without CYP3A4 inhibitor azoles

    Drug: Enzomenib

  • Experimental
    Phase 1 - Arm B

    R/R acute leukemia with CYP3A4 inhibitor azoles

    Drug: Enzomenib · Drug: azoles

  • Experimental
    Phase 1 - Arm C

    High-risk MDS after HMA

    Drug: Enzomenib

  • Experimental
    Phase 1 - Arm D

    Patients with refractory MM

    Drug: Enzomenib

  • Experimental
    Phase 1 - Arm E

    R/R AML with NPM1m or KMT2Ar

    Drug: Enzomenib · Drug: Venetoclax · Drug: Azacitidine (AZA)

  • Experimental
    Phase 1 - Arm F

    R/R AML with FLT3m + NPM1m or KMT2Ar

    Drug: Enzomenib · Drug: Gilteritinib

  • Experimental
    Phase 2 - Arm G

    R/R AML with MLLr

    Drug: Enzomenib

  • Experimental
    Phase 2 - Arm H

    R/R AML with NPM1m

    Drug: Enzomenib

  • Experimental
    Phase 2 - Arm I

    R/R ALL with MLLr

    Drug: Enzomenib

  • Experimental
    Phase 2 - Arm J

    R/R acute leukemia with MLLr

    Drug: Enzomenib · Drug: azoles

  • Experimental
    Phase 2 - Arm K

    R/R AML with NPM1m

    Drug: Enzomenib · Drug: azoles

  • Experimental
    Phase 1 - Arm L

    Newly diagnosed AML KMT2Ar FIT or UNFIT

    Drug: Enzomenib · Drug: azoles · Drug: Venetoclax · Drug: Azacitidine (AZA)

  • Experimental
    Phase 1 - Arm M

    Newly diagnosed AML NPM1m UNFIT only

    Drug: Enzomenib · Drug: azoles · Drug: Venetoclax · Drug: Azacitidine (AZA)

  • Experimental
    Phase 1 - Arm N

    Newly diagnosed AML with KMT2Ar or NPM1m

    Drug: Enzomenib · Drug: azoles · Drug: Intensive chemotherapy with 7 + 3

Interventions

06

What researchers measure

Primary outcomes

  1. Number of patients with adverse events and serious adverse events in Phase 1

    Assessment of safety of DSP-5336 administered in participants with advanced hematologic malignancies by reporting of adverse events and serious adverse events in Phase 1

    Time frame: 30 days from last dose

  2. Determination of Recommended Phase 2 Dose (RP2D)

    The RP2D is based on adverse events, pharmacokinetics, and clinical response

    Time frame: Within 4 months from first dose

  3. Determination of Recommended Phase 2 Dose (RP2D) for patients with relapse and refractory AML who are enrolled into the combination venetoclax and azacitidine arm

    The RP2D is based on adverse events, pharmacokinetics, and clinical response

    Time frame: Within 4 months from first dose

  4. Determination of Recommended Phase 2 Dose (RP2D) for patients with relapse and refractory AML who are enrolled into the gilteritinib arm

    The RP2D is based on assessment of Dose Limiting Toxicities

    Time frame: Within 4 months from first dose

  5. Optimal dose of DSP-5336 (RP2D) for patients newly diagnosed with AML enrolled into the combination venetoclax and azacitidine arm

    The RP2D is based on adverse events, pharmacokinetics and clinical response

    Time frame: Within 4 months from the first dose

  6. Determination of Recommended Phase 2 Dose (RP2D) for patients enrolled into the 7 + 3 arm

    The RP2D is based on assessment of Dose Limiting Toxicities

    Time frame: Within 4 months from first dose

  7. Number of patients achieving complete response (CR) and complete response with partial hematologic recovery (CRh) in Phase 2

    Disease response defined by the FDA guidance and ELN2017

    Time frame: Approximately 6 months after first dose

Secondary outcomes

  1. The maximum observed concentration (Cmax) of of DSP-5336, venetoclax and gilteritinib

    Cmax of DSP-5336, venetoclax and gilteritinib are calculated from the individual concentration time curve

    Time frame: Approximately 3 months after first dose

  2. Area under the plasma concentration vs. time curve (AUClast) of DSP-5336, venetoclax and gilteritinib

    The determination of AUClast using the linear/log trapezoidal rule

    Time frame: Approximately 3 months after first dose

  3. T(1/2) of DSP-5336, venetoclax and gilteritinib

    Elimination half-life (t\[1/2\]) of DSP-5336, venetoclax and gilteritinib

    Time frame: Approximately 3 months after first dose

  4. The maximum observed concentration (Cmax) of of DSP-5336 in the presence of high-fat meal

    Cmax of DSP-5336 is calculated from the individual concentration time curve

    Time frame: Approximately 3 months after first dose

  5. Area under the plasma concentration vs. time curve (AUClast) of DSP-5336 in the presence of high-fat meal

    The determination of AUClast using the linear/log trapezoidal rule

    Time frame: Approximately 3 months after first dose

  6. t(1/2) of of DSP-5336 in the presence of high fat meal

    Elimination half-life (t\[1/2\]) of DSP-5336

    Time frame: Approximately 3 months after first dose

  7. Number of patients achieving complete response (CR) in the 7+3 arm in Phase 1

    Disease response defined by the ELN2017

    Time frame: Approximately 6 months after first dose

  8. Number of patients achieving CRc, which means complete response (CR), complete response with partial hematologic recovery (CRh) or complete response with incomplete count recovery (CRi) in the 7+3 arm in Phase 1

    Disease response defined by the FDA guidance and ELN2017

    Time frame: Approximately 6 months after first dose

  9. Number of patients with adverse events and serious adverse events in Phase 2

    Assessment of safety of DSP-5336 administered in patients with advanced hematologic malignancies by reporting of adverse events and serious adverse events in Phase 2

    Time frame: 30 days from the last dose

  10. Number of patients achieving CRc, which means complete response (CR), complete response with partial hematologic recovery (CRh) or complete response with Incomplete count recovery (CRi) in Phase 2

    Disease response defined by the FDA guidance and ELN2027

    Time frame: Approximately 6 months after first dose

  11. Number of patients achieving ORR, which means complete response (CR), complete response with Incomplete count recovery (CRi) or MFLS (Morphologic leukemia-free state) in Phase 2

    Disease response defined by ELN2027

    Time frame: Approximately 6 months after first dose

  12. Event-Free Survival in Phase 2

    The time period from treatment initiation to hematologic relapse, progressive disease or death

    Time frame: Approximately 6 months after first dose

  13. Overall Survival in Phase 2

    The time period from treatment initiation to death

    Time frame: Two years after the end of treatment

07

Study locations

80 of 104 sites recruiting

Showing the first 100 of 104 sites across 12 countries. Choose a country and city above to see the rest.

08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Feb 2022 (actual). Primary completion is estimated for Jun 2027, 64 months after the start.

Of 92 industry-sponsored phase 1/2 interventional studies under Leukemia, Myeloid, Acute, half reached primary completion within 73 months of starting (the median), counting those still running; a quarter within 45 and three quarters within 91. This study's planned 64 months is below that.

Counting every sponsor, half of 226 studies reached it within 73 months; a quarter within 48 and three quarters within 106.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 26, 2021
First posted
Aug 3, 2021
StartActual
Feb 28, 2022
Primary completionEst.
Jun 30, 2027
CompletionEst.
Dec 31, 2027
Last update
Mar 24, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 24, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04988555
Responsible party
Sponsor
First posted
Aug 3, 2021
Start date
Feb 28, 2022
Primary completion
Jun 30, 2027 (estimated)
Completion
Dec 31, 2027 (estimated)
Last update
Mar 24, 2026

Study contacts

Matt Hitron, MD
Contact
matthew.hitron@us.sumitomo-pharma.com
508-481-6700

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Discussion

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Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: Enzomenib

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