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TerminatedNCT04092179Updated Jan 24, 2024

Study of Enasidenib and Venetoclax in IDH2-Mutated Blood Cancers

A Phase 1/2 interventional study of Enasidenib and Venetoclax in Acute Myeloid Leukemia, Relapsed Cancer and Refractory Cancer, sponsored by University Health Network, Toronto. Terminated at 2 sites in Canada. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-01-24.

Sponsored by University Health Network, Toronto · Phase 1/2, Interventional, and Treatment

Why this study was terminated
Insufficient Funding
Phase
Phase 1/2
Study type
Interventional
Enrollment
27
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this research study is to see how safe and tolerable, and to find the highest or best dose, of an investigational combination of drugs called enasidenib and venetoclax, in patients with relapsed (the cancer has come back) or refractory (the cancer does not respond or have stopped responding to treatment) acute myeloid leukemia (AML, a type of blood cancer). This study will also see how useful the combination of enasidenib and venetoclax is in the treatment of patients with relapsed or refractory AML.

Read the detailed description

This study will have two parts: Phase 1b and Phase 2. The part that patients may participate in will depend on when they join the study.

In the phase 1b portion of the study, small groups participants will receive increasing doses of venetoclax in combination with a flat dose of enadisenib until the highest dose or best dose of venetoclax that is safe and tolerable in combination with enadisenib is found.

In the phase 2 portion of the study, an additional group of participants will receive the highest or best dose of venetoclax found in the Phase 1b portion of the study with a flat dose of enadisenib to see how useful the combination is in treating relapsed or refractory acute myeloid leukemia (AML).

02

Conditions studied

  • Acute Myeloid Leukemia
  • Relapsed Cancer
  • Refractory Cancer
  • IDH2 Gene Mutation
03

In context

Lead sponsor

University Health Network, Toronto is the lead sponsor of 1,411 studies on the registry; 292 are open to participants now.

Of its 17 completed or terminated interventional studies of FDA-regulated products, 3 (18%) have results posted.

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

04

Who can participate

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

Inclusion criteria

  • Age ≥ 18 years
  • Eastern Cooperative Oncology Group (ECOG) performance score of ≤2
  • IDH2 (R140 or IDH R172) mutated AML disease status as determined by local laboratory
  • Relapsed and/or refractory acute myeloid leukemia (AML). Treatment-naïve patients who are not eligible for standard induction chemotherapy or high-risk myelodysplastic syndromes (MDS) or myeloproliferative neoplasms (MPN) may also be eligible.
  • Adequate hepatic function
  • Adequate renal function
  • Willing and able to provide informed consent
  • In the absence of rapidly proliferative disease, the interval from prior treatment to time of initiation will be at least 7 days for cytotoxic and non-cytotoxic (immunotherapy) agents

Exclusion criteria

Exclusion Criteria:

  • Known allergy or hypersensitivity to enasidenib or venetoclax
  • Previously received either an IDH2 inhibitor or BCL2 inhibitor
  • With any uncontrolled clinically significant medical conditions
  • The use of other chemotherapeutic agents or anti-leukemic agents, radiotherapy or other investigational therapy is not permitted during study with exceptions
  • Receiving concomitant treatment with strong cytochrome P450 2A (CYP3A4) inhibitors within 3 days of start of study therapy
  • Receiving concomitant strong CYP3A inducers (avasimibe, carbamazepine, phenytoin, rifampin, rifabutin, St. John's Wort) within 3 days of start of study therapy.
  • Taking the following sensitive CYP substrate medications that have a narrow therapeutic range are excluded from the study unless the subject can be transferred to other medications at least 5 half-lives prior to the start of study treatment: paclitaxel and docetaxel (CYP2C8), phenytoin (CYP2C9), S-mephenytoin (CYP2C19), thioridazine (CYP2D6), theophylline, and tizanidine (CYP1A2)
  • Active graft-versus-host-disease (GVHD) status post stem cell transplant
  • Severe gastrointestinal or metabolic condition which could interfere with the absorption of oral study medications
  • Concurrent active malignancy under treatment
  • Administration or consumption of any of the following within 3 days prior to first dose of study drug: grapefruit or grapefruits products, Seville oranges (including marmalade containing Seville oranges) and start fruit
  • Heart-rate corrected QT (QTc) interval ≥480 msec (Fridericia's formula) except for underlying right-bundle branch block (RBBB).
  • Positive for HIV
  • Subject has an unacceptable white blood cell count
  • Positive urine pregnancy test,
  • Participants who not willing to maintain adequate contraception
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
27 participants (actual)

Study arms

  • Experimental
    Venetoclax and Enadisenib

    Enasidenib and venetoclax will be taken by mouth (orally), once a day, every day, continuously. Every 28-day period will be called a cycle. Participants will start venetoclax alone on Cycle 1 Day 1 and continue the study drug alone until Day 15. On Day 15, participants will take enasidenib and venetoclax together and will continue to take the combination of study drugs until intolerable side effects or disease worsening.

    Drug: Enasidenib · Drug: Venetoclax

Interventions

  • DrugEnasidenib

    Enasidenib is a drug that blocks a protein called isocitrate dehydrogenase (IDH) 2 from working. The family of IDH proteins have been indicated in the development of leukemia. By blocking IDH2, enasidenib may help stop cancer cells from growing. It is believed that the drug may be more useful in patients with a change (mutation) in their IDH 2 protein. The IDH2 gene (substances in the body that contain instructions for the proper development and function of cells) makes IDH2 proteins. As such, only patients with IDH 2 mutated gene are eligible for this study. Enasidenib is currently approved for the treatment of IDH2 mutated AML.

    Also known as: IDHIFA

  • DrugVenetoclax

    Venetoclax is a drug that blocks a protein called B-cell lymphoma (BCL2) protein from working. BCL2 is a protein that helps control whether a cell lives or dies and is thought to help cancer cells to live. Blocking BCL2 is believed to help kill cancer cells. Venetoclax is currently approved for the treatment of type of blood cancer called chronic lymphocytic leukemia (CLL) who have received prior treatment.

    Also known as: VENCLEXTA

06

What researchers measure

Primary outcomes

  1. Overall response rate (ORR)

    Time frame: 3 years

  2. Dose Limiting Toxicity

    Time frame: 28 days

  3. Maximum tolerated dose or Recommended Phase 2 Dose

    Dose indicated by the mTPI decision

    Time frame: 3 years

  4. Duration of Response

    The time from the date of first response until progression, relapse, death, or last follow-up.

    Time frame: 3 years

Secondary outcomes

  1. Overall Survival

    The first day of treatment until death or last contact.

    Time frame: 3 years

  2. Event Free Survival

    The number of days from the first day of treatment to the date of earliest evidence of relapse or progression, subsequent treatment other than stem cell transplant while in response, or death, or date of last disease assessment.

    Time frame: 3 years

07

Study locations

2 sites
  • University of Alberta Hospital
    Edmonton, Alberta T6G 2B7, Canada
  • Princess Margaret Cancer Centre
    Toronto, Ontario M5G 1Z5, Canada
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 24, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04092179
Lead sponsor
University Health Network, Toronto
Collaborators
Celgene, AbbVie
Responsible party
Sponsor
First posted
Sep 17, 2019
Start date
Nov 5, 2020
Primary completion
Oct 26, 2023
Completion
Oct 26, 2023
Last update
Jan 24, 2024

Study contacts

Steven Chan, M.D.
principal investigator · Princess Margaret Cancer Centre

Oversight

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

Not currently enrolling

This study is terminated, as verified in Jan 2024. You cannot join it, but the record below documents what was studied.

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