Venetoclax With High-dose Ibrutinib for CLL Progressing on Single Agent Ibrutinib

• ClinicalTrials.gov Identifier: NCT03422393
• Recruitment Status: Recruiting
• First Posted: February 5, 2018
• Last Update Posted: January 9, 2020
• Sponsor: Michael Choi
• Collaborator: Pharmacyclics LLC.
• Information provided by (Responsible Party): Michael Choi, University of California, San Diego

Study Description

Brief Summary:

The purpose of the study is to investigate whether the combination of venetoclax and ibrutinib (administered up to 840 mg per day) might be useful for the treatment of CLL or SLL that is not responding or no longer responding to treatment with ibrutinib alone. The study will evaluate whether this regimen can reduce the amount of cancerous cells in your body. If you agree, you will receive ibrutinib at a dose of up to 840 mg a day by mouth, as well as venetoclax. Although both of these agents are approved by the FDA for the treatment of CLL or SLL, the combination and the dosing schedule of ibrutinib are considered experimental.

Condition or disease	Intervention/treatment	Phase
Chronic Lymphocytic Leukemia; Small Lymphocytic Lymphoma	Drug: Venetoclax; Drug: Ibrutinib	Phase 1

Detailed Description:

This is phase 1 study for patients with CLL or small lymphocytic lymphoma (SLL) experiencing disease progression on single ibrutinib. This study will evaluate the optimal ibrutinib dose (including doses higher than 420 mg) when combined with venetoclax

During the screening period, patients will continue on ibrutinib at their previous tolerated dose, unless required to stop (e.g.: by a preceding clinical trial).

On cycle 1, day 1, the dose of ibrutinib will be assigned based on the dose cohort. Patients in cohort 1 will receive ibrutinib 420 mg PO daily. Patients in cohort 2 will receive ibrutinib 560 mg PO daily. Cohort 3 will be 840 mg PO daily.

On cycle 1, day 1, patients will initiate venetoclax. The dose of venetoclax will ramp-up from 20 mg PO daily to 400 mg PO daily over a 5 week period.

The primary safety endpoint is determination of DLTs during the first 35 days (completion of dose ramp up). The primary efficacy endpoint of overall response rate will be assessed on approximately Cycle 7, Day 1.

Rationale: The optimal management of patients that progress on ibrutinib, including those with acquired Btk or PLCg2 mutations, is not determined. In other cancers, continued treatment with small molecule inhibitors beyond disease progression provides significant benefit, with additional agents or adjustments to ablate the resistant subclone. Venetoclax is approved for the treatment of patients with CLL, and is well-tolerated and effective in high-risk disease, and so is an appropriate agent for this trial.

Study Design

• Study Type: Interventional (Clinical Trial)
• Estimated Enrollment: 24 participants
• Intervention Model: Single Group Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase 1 Clinical Trial to Evaluate Venetoclax With High-dose Ibrutinib for the Treatment of Patients With Chronic Lymphocytic Leukemia With Progressive Disease on Single Agent Ibrutinib.
• Actual Study Start Date: May 1, 2018
• Estimated Primary Completion Date: August 2020
• Estimated Study Completion Date: August 2028

Arms and Interventions

Arm

Intervention/treatment

Experimental: venetoclax with high-dose ibrutinib; venetoclax with high-dose ibrutinib for the treatment of patients with chronic lymphocytic leukemia with progressive disease on single agent ibrutinib.

Drug: Venetoclax; On cycle 1, day 1, patients will initiate venetoclax. The dose of venetoclax will ramp-up from 20 mg PO daily to 400 mg PO daily over a 5 week period.; Other Name: Venclexta; Drug: Ibrutinib; During the screening period, patients will continue on ibrutinib at their previous tolerated dose, unless required to stop (e.g.: by a preceding clinical trial). On cycle 1, day 1, the dose of ibrutinib will be assigned based on the dose cohort. Patients in cohort 1 will receive ibrutinib 420 mg PO daily. Patients in cohort 2 will receive ibrutinib 560 mg PO daily. Cohort 3 will be 840 mg PO daily.; Other Name: Imbruvica

Outcome Measures

Primary Outcome Measures :

1. Maximum tolerated dose or biologically active dose. [ Time Frame: 1 year or more ]
   Maximum tolerated dose or biologically active dose.

Secondary Outcome Measures :

1. Treatment-emergent adverse events [ Time Frame: 2 years or more ]
   Treatment-emergent adverse events (description, timing, grade [CTCAE v4.03], severity, seriousness, and relatedness)
2. Overall response rate [ Time Frame: 2 years or more ]
   Partial Response, Partial Response with Lymphocytosis, and Complete Response) based on international working group guidelines. Best overall response will be determined
3. Progression free survival rate at completion of combination therapy [ Time Frame: 2 years or more ]
   Progression free survival rate at completion of combination therapy, duration of response, as determined by International Working Group in CLL (iwCLL) criteria.
4. Stable disease rate [ Time Frame: 2 years or more ]
   Stable disease rate (also based on 2008 iwCLL guidelines), also at the time of primary endpoint response assessment.

Eligibility Criteria

• Ages Eligible for Study: 18 Years and older (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Clinical and phenotypic verification of B cell CLL or SLL and measurable disease.
• Prior therapy: Patients must have been receiving single agent ibrutinib therapy at the time of disease progression. Patient may have received other therapy in combination with ibrutinib earlier in their treatment course.
• Women of childbearing potential (not postmenopausal for at least one year or not surgically incapable of bearing children) must agree not to become pregnant for the duration of the study.
• Adequate hematologic, hepatic and renal function

Exclusion Criteria:

• Known CNS lymphoma or leukemia
• History of Richter's or prolymphocytic transformation.
• Primary ibrutinib resistance
• Uncontrolled autoimmune hemolytic anemia (AIHA) or idiopathic thrombocytopenia purpura (ITP)
• History of major surgery within 4 weeks prior to first dose on this study.
• History of prior malignancy, with the exception of adequately treated non-melanoma skin cancer, malignancies treated with curative intent and with no evidence of active disease for more than 3 years, or adequately treated cervical carcinoma in situ without current evidence of disease.
• Active clinically significant cardiovascular disease or history of myocardial infarction within 6 months of first dose.
• Active hepatitis B or C infection.
• Known history of infection with human immunodeficiency virus (HIV).
• Unable to swallow capsules or disease significantly affecting gastrointestinal function.
• History of stroke or intracranial hemorrhage within 6 months of first dose.
• Requires anticoagulation with warfarin or other Vitamin K antagonists.
• Requires treatment with a strong cytochrome P(CYP)450 3A inhibitor.
• Pregnant or breast-feeding women
• Current infection requiring parenteral antibiotics.
• Active, clinically significant hepatic impairment Child-Pugh class B or C according to the Child Pugh classification.
• Patients who require immediate cytoreduction due to high risk of tumor lysis syndrome (ie, absolute lymphocyte count greater than 100k/uL).

Contacts and Locations

Contacts

Contact: Michael Choi, MD; (858) 534-1765; mychoi@ucsd.edu

Locations

United States, California

UC San Diego Moores Cancer Center; Recruiting

La Jolla, California, United States, 92093

Sponsors and Collaborators

Michael Choi

Pharmacyclics LLC.

Investigators

• Principal Investigator: Michael Choi, MD; University of California, San Diego

More Information

• Responsible Party: Michael Choi, Clinical investigator, University of California, San Diego
• ClinicalTrials.gov Identifier: NCT03422393
• Other Study ID Numbers: 171613
• First Posted: February 5, 2018
• Last Update Posted: January 9, 2020
• Last Verified: January 2020

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Michael Choi, University of California, San Diego:

venetoclax; ibrutinib; high-dose ibrutinib; chronic lymphocytic leukemia; progressive disease; Small Lymphocytic Lymphoma; cancer

Additional relevant MeSH terms:

Leukemia; Leukemia, Lymphoid; Leukemia, Lymphocytic, Chronic, B-Cell; Neoplasms by Histologic Type; Neoplasms; Lymphoproliferative Disorders; Lymphatic Diseases; Immunoproliferative Disorders; Immune System Diseases; Leukemia, B-Cell; Venetoclax; Antineoplastic Agents