🏛️ Verified NIH Record • Updated 2026-07-15

Acalabrutinib and Venetoclax With or Without Early Obinutuzumab for the Treatment of High Risk, Recurrent, or Refractory Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma (NCT04169737)

A Randomized Phase II Study of Acalabrutinib (ACA) + Venetoclax (VEN) +/- Early Obinutuzumab (OBIN) for Patients With Chronic Lymphocytic Leukemia (CLL)

🟢 Recruiting Phase2 💊 Investigational Drug / Biologic Sponsor: M.D. Anderson Cancer Center

🩺 Plain-English Summary (8th-Grade Level)

This phase II trial studies how well acalabrutinib and venetoclax with or without early obinutuzumab work for the treatment of chronic lymphocytic leukemia or small lymphocytic lymphoma that is high risk, has come back (recurrent), or does not respond to treatment (refractory). Acalabrutinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Venetoclax may stop the growth cancer cells by blocking BCL-2 protein needed for cell growth. Immunotherapy with monoclonal antibodies, such as obinutuzumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving acalabrutinib and venetoclax together with early obinutuzumab may improve clinical outcomes and control the disease.

Who can join: To join this study, participants generally need to meet the listed inclusion criteria (11 items) and avoid the listed exclusions (17 items).

Location: M D Anderson Cancer Center — Houston, Texas

Age range: 18 Years

📋 "Do I Qualify?" — 1-Minute Self Screener

Instant Checklist

Check every box below. If you can check all of them, you may meet the study's basic screening requirements (final eligibility is confirmed by the site team).

Usually NOT eligible if any of the following apply:

  • Exclusion Criteria:
  • Prior treatment with combined BTKi and BCL2i where patients do not achieve at least partial response or progress and need new treatment within 2 years of completing fixed-duration combined treatment.
  • Major surgery, radiotherapy, chemotherapy, biologic therapy, immunotherapy, investigational therapy or live virus vaccination within 3 weeks prior to the first dose of the study drugs, unless patients have rapidly progressive disease, in which case, washout will be 3 drug half-lives
  • History of severe allergic or anaphylactic reactions to humanized or murine monoclonal antibodies or known sensitivity or allergy to murine products
  • Uncontrolled clinically significant active infection (viral, bacterial, and fungal)
  • Known positive serology for human immunodeficiency virus (HIV), due to potential drug-drug interactions between anti-retroviral medications and the study drugs
  • Active hepatitis B infection (defined as the presence of detectable HBV DNA, HBe antigen or HBs antigen). Subjects with serologic evidence of prior vaccination (HBsAg negative, anti-HBs antibody positive, anti-HBc antibody negative) are eligible. Patients who are HBsAg negative/HBsAb positive but HBcAb positive are eligible, provided HBV DNA is negative.
  • Active hepatitis C, defined by the detectable hepatitis C RNA in plasma by PCR
  • Active, uncontrolled autoimmune phenomenon (autoimmune hemolytic anemia or immune thrombocytopenia) requiring steroid therapy with \>20mg daily of prednisone dose or equivalent
  • Significant cardiovascular disease such as uncontrolled or symptomatic arrhythmias, congestive heart failure, or myocardial infarction within 6 months of screening, or any Class 3 or 4 cardiac disease as defined by the New York Heart Association Functional Classification.
  • Patient is pregnant or breast-feeding
  • Concurrent use of warfarin

🔍 Extracted verbatim from the official NIH eligibility criteria. Always confirm with the study coordinator.

📍 All Participating Trial Locations (1 Sites)

  • M D Anderson Cancer Center — Houston, Texas

📞 Contact the Study Coordinator

Phone: (713) 745-0428

Email: wwierda@mdanderson.org

Coordinator details come directly from the registered NIH protocol. Confirm the study is still recruiting before traveling.

💰 Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA § 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

💡 How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Contact the study coordinator using the phone/email above.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
🏛️ View Official NIH Record ↗