InformationClinical trials have complex eligibility criteria.
Always talk to your clinician about you’re interest in participating in a trial.
Learn why

Optimise reading forHealth ProfessionalsPatients

RecruitingLast updated: 23 January 2024

EZ7438: This phase I/II trial is evaluating an oral drug (tazemetostat) alone and in combination with a steroid (prednisolone) for the treatment of advanced solid cancers and patients with B Cell LymphomaAn Open-Label, Multicenter, Phase 1/2 Study of E7438 (EZH2 Histone Methyl Transferase [HMT] Inhibitor) as a Single Agent in Subjects With Advanced Solid Tumors or With B-cell Lymphomas

Clinical summary


This is a multicenter, open-label, Phase 1/2 study that is being conducted in two parts. The Phase 1 portion comprises dose escalation and establishment of the recommended Phase 2 dose (RP2D) when EPZ-6438 (E7438) is given BID (twice daily) orally on a continuous basis. Additionally, in separate cohorts in Phase 1, the effect of food on the bioavailability of EPZ-6438 as well as the drug-drug interaction (DDI) potential of EPZ-6438 are being evaluated. When maximum tolerated dose (MTD) has been identified and the RP2D confirmed, the Phase 2 portion will enroll subjects that have relapsed/refractory diffuse large B-cell lymphoma (DLBCL) or follicular lymphomas (FL) that have either mutant or wild-type EZH2.


This trial is treating patients with Advanced solid cancers, B Cell Lymphoma


Multi-Cancer Multi-Cancer





Trial Acronym


More information

Trial Identifiers

Use the hyperlinks, where available to access additional clinical trial information.

Trial sponsor

Epizyme, Inc.

Scientific Title

An Open-Label, Multicenter, Phase 1/2 Study of E7438 (EZH2 Histone Methyl Transferase [HMT] Inhibitor) as a Single Agent in Subjects With Advanced Solid Tumors or With B-cell Lymphomas



  1. Phase 1: Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1. Phase 2: ECOG performance status of 0 to 2.
  2. Life expectancy of at least 3 months before starting tazemetostat.
  3. Voluntary agreement to provide written informed consent and willing to adhere to all protocol requirements
  4. Subjects with Hepatitis B or C are eligible on the condition that subjects have adequate liver function and are hepatitis B surface antigen negative and/or have undetectable hepatitis C virus (HCV) RNA.
  5. Adequate renal and liver function
  6. Phase 1: Males or females aged ≥ 16 years at time of informed consent. Phase 2: Males or females aged ≥ 18 years at the time of informed consent .
  7. Females must not be lactating or pregnant at screening or baseline as documented by a negative pregnancy test All females will be considered to be of childbearing potential unless they are postmenopausal (at least 12 months consecutive amenorrheic, in the appropriate age group, and without other known or suspected cause) or have been sterilized surgically (ie, bilateral tubal ligation, total hysterectomy or bilateral oophorectomy, all with surgery at least 1 month before dose). Females of childbearing potential must not have had unprotected sexual intercourse within 30 days prior to study entry and must agree to use a highly effective method of contraception, from the last menstrual period prior to randomization, during Treatment Cycles, and for 6 months after the last final dose of study drug; any male partner must use a condom.
  8. Male subjects must have had a successful vasectomy (with confirmed azoospermia) or they and their female partner must meet the criteria above (ie, not of childbearing potential or practicing highly effective contraception and use a condom throughout the study period and for 3 months after study drug discontinuation). Nonvasectomized male subjects must also agree to refrain from donating sperm from first dose of tazemetostat until 3 months following the last dose of tazemetostat
  9. Phase 1 only: Histologically and/or cytologically confirmed advanced or metastatic solid tumor or B-cell lymphomas that have progressed after treatment with approved therapies or for which there are no standard therapies available.
  10. Phase 2, Groups 1-6 only: Subjects must satisfy all of the following criteria:

    1. Have histologically confirmed DLBCL (including primary mediastinal B-cell lymphoma), with relapsed or refractory disease following at least 2 lines of prior standard therapy, including alkylator/anthracycline (unless anthracycline-based chemotherapy is contraindicated)/anti-CD20-based therapy (rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone [R-CHOP] or equivalent) AND must be considered unable to benefit from intensification treatment with autologous hematopoietic stem cell transplantation (ASCT) as defined by meeting at least 1 of the following criteria:

      • Relapsed following, or refractory to, previous ASCT
      • Did not achieve at least a partial response to a standard salvage regimen (eg, rituximab, ifosfamide, carboplatin, and etoposide phosphate [R-ICE] or rituximab, dexamethasone, cytarabine, and cisplatin [R-DHAP])
      • Ineligible for intensification treatment due to age or significant comorbidity
      • Ineligible for intensification treatment due to failure to mobilize an acceptable number of hematopoietic stem cells
      • Refused intensification treatment and/or ASCT or
    2. Have histologically confirmed Follicular Lymphoma (FL), all grades. Subjects may have relapsed/refractory disease following at least 2 standard prior systemic treatment regimens where at least 1 anti-CD20-based regimen was used. Subjects with prior radiotherapy will be included; however, radiotherapy alone will not be considered a systemic treatment regimen.
    3. Have provided sufficient archival tumor tissue that has been successfully tested for EZH2 mutation status and cell of origin (DLBCL only)
    4. Have measurable disease as defined by International Working Group-Non-Hodgkin's Lymphoma (IWG-NHL)


  1. Prior exposure to tazemetostat or other inhibitor(s) of EZH2.
  2. Subjects with leptomeningeal metastases or brain metastases or history of previously treated brain metastases.
  3. Has thrombocytopenia, neutropenia, or anemia of Grade ≥3 (per CTCAE 4.03 criteria) and any prior history of myeloid malignancies, including myelodysplastic syndrome (MDS).
  4. Has a prior history of T-cell lymphoblastic lymphoma(T-LBL) or T-cell lymphoblastic leukemia (T-ALL).
  5. Subjects taking medications that are known strong CYP3A inhibitors and strong or moderate CYP3A inducers (including St. Johns Wort) 6. Subjects unwilling to remove Seville oranges, grapefruit juice and grapefruit from their diet.
  6. Any unstable or unresolved prior treatment-related (i.e. chemotherapy, immunotherapy, radiotherapy) toxicities at time of enrollment.
  7. Major surgery within 4 weeks before the first dose of study drug. .
  8. Inability to take oral medication, or malabsorption syndrome or any other uncontrolled gastrointestinal condition (e.g., nausea, diarrhea, or vomiting) that might impair the bioavailability of tazemetostat.
  9. Significant cardiovascular impairment: history of congestive heart failure greater than New York Heart Association (NYHA) Class II, uncontrolled arterial hypertension, unstable angina, myocardial infarction, or stroke within 6 months of the first dose of study drug; or cardiac ventricular arrhythmia.
  10. Venous thrombosis or pulmonary embolism within the last 3 months before starting tazemetostat.
  11. Active infection requiring systemic therapy.
  12. Immunocompromised patients, including patients known to be infected with human immunodeficiency virus (HIV).
  13. Any other major illness that, in the investigator's judgment, will substantially increase the risk associated with the subject's participation in this study.
  14. Females who are pregnant or breastfeeding.
  15. Phase 2 only: Subjects with noncutaneous malignancies other than B-cell lymphomas. Exception: Subjects with another malignancy who have been disease-free for 5 years, or subjects with a history of a completely resected non-melanoma skin cancer or successfully treated in situ carcinoma are eligible.


  • You are able to swallow medication by mouth.
  • You have had treatment but your cancer has gotten worse or has not responded to the treatment you have been given.
  • You have had treatment, but your cancer has come back.
  • Your cancer has spread to other parts of the body.


  • You have been diagnosed with a prior or secondary type of cancer.
  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.

Clinical trials have complex eligibility criteria.

Ask your doctor if this trial could be right for you.

Participating hospitals

Recruiting hospitals

+ Show non-recruiting hospitals

Closed hospitals

InformationTell us if you find this trial availability is not accurate.Report inaccuracy

Get Support


Cancer Connect

You might find it helpful to speak to someone who has 'been there before'. Our Cancer Connect program can provide one-on-one phone support from someone who understands what you're going through and has clinical trials experience.

Learn more


Cancer Council’s cancer nurses

If you need cancer information and practical support for yourself, a carer, family or friend, contact Cancer Council’s experienced cancer nurses on 131120.

Learn more


Information for family, friends and carers

When you are considering a cancer clinical trial, it is a good idea to discuss it with your family, friends or carers.

Learn more

Victorian Cancer Registry Victorian Government

The Victorian Cancer Trials Link is supported by the Victorian Government through the Victorian Cancer Agency.


Cancer Council Victoria would like to acknowledge the traditional custodians of the land on which we live and work. We would also like to pay respect to the elders past and present and extend that respect to all other Aboriginal people.