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Chronic Lymphocytic LeukemiaPhase 1/2NCT03534323

Duvelisib and Venetoclax in Relapsed or Refractory CLL or SLL or RS

A Phase 1/2 study testing Duvelisib and Venetoclax in people with Chronic Lymphocytic Leukemia and Richter Syndrome, run by Dana-Farber Cancer Institute at 7 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This research study is assessing a new drug, duvelisib, in combination with a drug that is already FDA approved, venetoclax, as a possible treatment for participants with CLL or those with Richter's Syndrome Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
Duvelisib and Venetoclax
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
55 participants
Where
7 sitesUnited States
Study dates
12 Jul 2018to 1 Jul 2026
Phase
Phase 1/2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Must have a confirmed diagnosis of chronic lymphocytic leukemia or small lymphocytic lymphoma requiring therapy, as per IW-CLL 2008 criteria OR Biopsy proven transformation to diffuse large B cell lymphoma (DLBCL), consistent with Richter's Syndrome
  • Disease that has progressed during or relapsed after at least one previous CLL/SLL therapy - If Richter's Syndrome, this criterion is not applicable
  • Age greater to or equal to 18 years
  • ECOG performance status ≤2 (Karnofsky ≥60%)
  • Patients must meet the following hematologic criteria at screening, unless they have significant bone marrow involvement of CLL confirmed on biopsy:
  • Absolute neutrophil count ≥500 cells/mm3 (0.5 x 109/L). Growth factor is allowed in order to achieve this
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  • Platelet count ≥25,000 cells/mm3 (25 x 109/L) independent of transfusion within 7 days of screening
  • Adequate hepatic function defined as:
  • --Serum aspartate transaminase (AST) and alanine transaminase (ALT) ≤ 3.0 x upper limit of normal (ULN), bilirubin ≤1.5 x ULN (unless bilirubin rise is due to Gilbert's syndrome or of non-hepatic origin
  • Adequate renal function as defined as:
  • --Serum creatinine ≤1.5 times the upper limit of normal or creatinine clearance ≥ 50 mL/min using a 24-hour urine collection
  • Women of child-bearing potential and men must agree to use adequate contraception (hormonal, barrier method or abstinence) prior to study entry and for the duration of study participation
  • Ability to understand and the willingness to sign a written informed consent document

Who cannot join

  • Previous treatment with venetoclax or duvelisib
  • Patients receiving cancer therapy (i.e., chemotherapy, radiation therapy, immunotherapy, biologic therapy, surgery within 2 weeks of Cycle 1/Day 1 with the following exceptions:
  • For patients on targeted therapies, a washout of least five half lives is required
  • Patients who experience clinical deterioration may start therapy after a shorter washout period with prior approval by the PI
  • Corticosteroid therapy (prednisone or equivalent <20 mg daily) is allowed
  • Confirmed central nervous system involvement
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  • Allogeneic hematologic stem cell transplant within 6 months of starting study treatment or active graft vs. host disease (GVHD) requiring treatment or prophylaxis
  • History of active malignancy requiring therapy with the exception of hormonal therapy
  • Any active systemic infection requiring IV antibiotics or uncontrolled, active infections
  • Known history of human immunodeficiency virus (HIV), hepatitis C virus (HCV), or hepatitis B virus (HBV)
  • Major surgery within 4 weeks of first dose of study drug
  • Currently active gastrointestinal disease, including colitis, inflammatory bowel disease and diarrhea requiring therapy
  • Currently active, clinically significant cardiovascular disease, such as uncontrolled arrhythmia or Class 3 or 4 congestive heart failure as defined by the New York Heart Association Functional Classification; or a history of myocardial infarction, unstable angina, or acute coronary syndrome within 6 months prior to randomization
  • Any life-threatening illness, medical condition, or organ system dysfunction that, in the investigator's opinion, could compromise the subject's safety or put the study outcomes at undue risk
  • Use of Coumadin for anticoagulation (other anticoagulants permitted)
  • Lactating or pregnant
  • Concurrent administration of medications or foods that are strong inhibitors or inducers of CYP3A (see Appendix D) . The concomitant use of drugs or foods that are strong or moderate inhibitors or inducers of CYP3A are not allowed beginning 1 week prior to the first dose of duvelisib.
  • Patients with ongoing use of prophylactic antibiotics are eligible as long as there is no evidence of active infection and the antibiotic is not included on the list of prohibited medications
  • Unable to swallow capsules or malabsorption syndrome, disease significantly affecting gastrointestinal function, or resection of the stomach or small bowel, symptomatic inflammatory bowel disease or ulcerative colitis, or partial or complete bowel obstruction resulting in malabsorption or chronic diarrhea
  • Active abuse of alcohol
  • History of chronic liver disease or veno-occlusive disease/sinusoidal obstruction syndrome
  • History or concurrent condition of interstitial lung disease of any severity and/or severely impaired lung function
  • Known hypersensitivity to duvelisib and/or its excipients
  • History of tuberculosis treatment within the 2 years prior to initiation of therapy

Trial locations and contacts

7 sites in 1 country.

7 sites in 1 country

United States7 sites
  • Massachusetts General Hospital

    Boston, Massachusetts, 02114

  • Boston Medical Center

    Boston, Massachusetts, 02118

  • Beth Israel Deaconess Medical Center

    Boston, Massachusetts, 02215

  • Dana Farber Cancer Institute

    Boston, Massachusetts, 02215

  • Northern Light Eastern Maine Medical Center

    Brewer, Maine, 04412

  • University of Miami- Sylvester Comprehensive Cancer Center

    Miami, Florida, 33136

  • Berkshire Medical Center

    Pittsfield, Massachusetts, 01201

Other trials in United States

About this study

Official title: A Phase I/II Study of Duvelisib and Venetoclax in Patients With Relapsed or Refractory Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma or Patients With Richter's Syndrome

This research study is assessing a new drug, duvelisib, in combination with a drug that is already FDA approved, venetoclax, as a possible treatment for participants with CLL or those with Richter's Syndrome

Read the detailed description

This is a Phase I/II clinical trial. A Phase I clinical trial tests the safety of an investigational drugs and also tries to define the appropriate dose of the investigational drugs to use for further studies. "Investigational" means that the drugs are being studied together for the first time.

This phase I study tests the safety of the drug duvelisib when used in combination with the drug venetoclax. Duvelisib is still being studied, but the FDA (the U.S. Food and Drug Administration) has approved the use of Duvelisib in patients with CLL/SLL with relapsed or refractory CLL after having received 2 or more prior therapies.

Duvelisib is a drug that is given in capsule form and taken by mouth. This drug is designed to stop cancer growth by blocking a protein called phosphatidylinositide 3-kinase (PI3K), which is important for the survival of CLL cells. In laboratory studies and in other clinical trials that included participants with CLL, duvelisib was effective at killing CLL cells.

Venetoclax is a tablet that is taken by mouth. Venetoclax targets a protein called BCL-2, which helps cancer cells survive. Venetoclax is an effective treatment for many participants with CLL who do not respond to chemotherapy or other approved drugs or who have relapsed after prior therapy.Venetoclax is FDA approved for participants with CLL who have never had therapy before or whose CLL has worsened after prior therapy.

In the phase I portion of this study, the investigators are looking to determine the dose of venetoclax that is safe to give with duvelisib and to see what the side effects are of this combination.

In the phase II portion of this study, we are looking to determine how effective thecombination of duvelisib and venetoclax is for patients with CLL or Richter's Syndrome

Being tested
Duvelisib, Venetoclax
Keywords
chronic lymphocytic leukemia (CLL), Richter's Syndrome, Richter's Transformation
Medical subject headings
Leukemia, Lymphocytic, Chronic, B-Cell

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • DuvelisibDrug

    Also called IPI-145

    This drug is designed to stop cancer growth by blocking a protein called phosphatidylinositide 3-kinase (PI3K), which is important for the survival of CLL cells.

  • VenetoclaxDrug

    Also called Venclexta

    Venetoclax targets a protein called BCL-2, which helps cancer cells survive.

Study groups in NCT03534323
Study groupRoleWhat they receive
Phase 1 Level 1: 100 mg Venetoclax (daily) + 25 mg Duvelisib (BID)ExperimentalDuvelisib will be given alone for the first seven days. On day 8 Venetoclax will be added. * Duvelisib will be administered orally twice daily of 25mg * Venetoclax will be administered orally daily of 100mg * All patients will be admitted for administration of the initial dose of venetoclax at each dose escalation
Receives: Drug: Duvelisib; Drug: Venetoclax
Phase 1 Level 2: 200 mg Venetoclax (daily) + 25 mg Duvelisib (BID)Experimental* Duvelisib will be administered orally twice daily of 25mg * Venetoclax will be administered orally daily of 200mg * All patients will be admitted for administration of the initial dose of venetoclax at each dose escalation
Receives: Drug: Duvelisib; Drug: Venetoclax
Phase 1 Level 3: 400 mg Venetoclax (daily) + 25 mg Duvelisib (BID)Experimental* Duvelisib will be administered orally twice daily of 25mg * Venetoclax will be administered orally daily of 400mg * All patients will be admitted for administration of the initial dose of venetoclax at each dose escalation
Receives: Drug: Duvelisib; Drug: Venetoclax
Phase 2: 400 mg Venetoclax (daily) + 25 mg Duvelisib (BID)Experimental* Duvelisib will be administered orally twice daily of 25mg * Venetoclax will be administered orally daily of 400mg
Receives: Drug: Duvelisib; Drug: Venetoclax

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Complete Response Rate (CRR)

    The overall response rate (ORR) was defined as the proportion of participants achieving complete response (CR) based on IWCLL 2008 and Lugano 2014 criteria for RS.

    Measured: Response assessment on the end of cycle 3, 6 and 13. With 28 days per cycle.

  2. Overall Response Rate (ORR)

    The overall response rate (ORR) was defined as the proportion of participants achieving complete response (CR) or partial response (PR) based on IWCLL 2008 and Lugano 2014 criteria for RS.

    Measured: Response assessment on the end of cycle 3, 6 and 13. With 28 days per cycle.

Secondary outcomes (3)
  1. 12-month Progression-Free Survival (PFS) Rate

    Progression-free survival based on the Kaplan-Meier method is defined as the duration between randomization and documented disease progression (PD) or death, or is censored at time of last disease assessment.

    Measured: Relevant to this endpoint is at 12 month.

  2. 1-year Overall Survival (OS)

    1-year OS is a probability estimated using the Kaplan-Meier method; OS is defined as the time from study entry to death, or censored at date last known alive.

    Measured: Relevant to this endpoint is 1 year.

  3. 1-year MRD Negativity Rate

    Defined by the proportion of participants achieved the MRD negative CR in bone marrow.

    Measured: At 1 year

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted23 May 2018
  2. Study start12 Jul 2018
  3. Primary completion1 Dec 2024
  4. Study completion1 Jul 2026

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Single group
Masking
None (open label)
Enrolment
55 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03534323
Sponsor's protocol ID
18-089
Status last verified
Oct 2026
First submitted
2 May 2018
Last updated
28 Oct 2026
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Crombie JL, Ryan CE, Ren Y, Tyekucheva S, Carey C, Zou A, Normilus S, Montegaard J, Bhandari S, Alencar A, Soumerai JD, Arnason JE, Kim AI, Parry EM, Armand P, Fisher DC, Brown JR, Davids MS. A phase 1/2 study of duvelisib plus venetoclax in patients with relapsed/refractory CLL/SLL or Richter transformation. Blood Adv. 2026 Jun 9;10(11):3811-3819. doi: 10.1182/bloodadvances.2025018878.

    PubMed 41886642

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing Duvelisib and Venetoclax in people with Chronic Lymphocytic Leukemia and Richter Syndrome, run by Dana-Farber Cancer Institute at 7 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 13 inclusion and 24 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 28 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 7 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 23 Mar 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Complete Response Rate (CRR) (time frame: Response assessment on the end of cycle 3, 6 and 13. With 28 days per cycle.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03534323, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Oct 2026.

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