Category: Patient Education

Venetoclax for the Treatment of CLL Patients who have Relapsed after or are Refractory to Ibrutinib/Idelalisib

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By Richard Furman, M.D.

CLL patients who relapse after or are refractory to ibrutinib or idelalisib often have few treatment options and poor outcomes. In an ongoing phase II study, presented at the 2016 annual ASCO meeting, researchers investigated the activity of venetoclax in patients with CLL who have relapsed or become refractory to ibrutinib or idelalisib. Venetoclax (Venclexta, ABT-199), is the first FDA-approves treatment that inhibits the BCL-2 (B-cell lymphoma 2) protein. The BCL-2 protein plays an important role in enabling CLL cells to survive. CLL cells and other lymphomas over express and are more dependent upon BCL-2 protein than normal cells. Therefore, when venetoclax inhibits the protein, the CLL cells die, while the normal cells continue unharmed.

54 patients were enrolled into the two arms of the trial based upon whether they were relapsed or refractory to ibrutinib (Arm A, 38 patients) or idelalisib (Arm B, 10 patients). 48 patients were evaluable for responses. The overall response rate for ibrutinib treated patients was 61% (CR=8%; PR=53%) and for idelalisib was 50% (CR=0%; PR=50%). Side effects were found in less than 20% of patients with the most common including neutropenia, diarrhea, nausea, anemia, fatigue, and hypophosphatemia. These results show that venetoclax displays promising activity for CLL patients who have relapsed or are refractory to both ibrutinib and idelalisib and can be safely administered.

Further research is required to demonstrate the depth and duration of response, but these initial results are positive.

Nivolumab Granted Accelerated Approval for the Treatment of Classical Non-Hodgkin Lymphoma

The Backstory

On May 14, 2014, the immunotherapy drug nivolumab (Opidivo) received the FDA Breakthrough Therapy Designation for the treatment of patients with Hodgkin lymphoma whose disease relapsed after autologous stem cell transplant and treatment with brentuximab vedotin. Almost exactly two years later, on May 17, 2016, the FDA granted nivolumab accelerated approval for the treatment of people with classical Hodgkin lymphoma (cHL) that has relapsed or progressed after autologous hematopoietic stem cell transplantation (HSCT) and post-transplantation brentuximab vedotin

What is nivolumab?

Nivolumab is the first PD-1 blocking antibody approved for the treatment of a hematologic malignancy. Nivolumab inhibits a protein called PD-1. PD-1 primarily functions as an immune checkpoint, reducing the body’s natural immune response. PD-1 blockers like nivolumab interfere with PD-1 function and allow a person’s own immune system to destroy cancer cells; i.e., PD-1 blockers help the immune system to kill cancer.

Why did the FDA grant nivolumab the accelerated approval designation?

Nivolumab was granted an accelerated approval by the FDA based on results from two clinical trials in adults with relapsed or refractory Hodgkin lymphoma. In one study of 95 patients that had previously undergone autologous stem cell transplantation and brentuximab vedotin, 65% of people responded to nivolumab, with this response lasting almost 9 months on average. The FDA evaluated the safety of nivolumab in 263 patients treated on the second study. As is the case with all accelerated approvals, continued approval will be contingent upon the confirmed clinical results of a randomized phase III trial.

Were there any side effects?

Immune-mediated side effects occurred in 1% to 5% of patients and included rash, pneumonitis (inflammation of the lung), hepatitis (inflammation of the liver), hyperthyroidism, and colitis (inflammation of the intestine). Serious side effects were reported by 21% of patients. Additionally, the FDA issued a “Warning and Precaution” notice for patients who receive nivolumab followed by an allogeneic stem cell transplant. This was due to an increase in complications after allogeneic transplant that may be related to nivolumab. The FDA advises health care professionals to closely follow patients who receive nivolumab followed by allogeneic stem cell transplant for any complications. They have also required further study on the safety of allogeneic HSCT after nivolumab by the drug sponsor.

How can you access nivolumab now?

As an FDA approved drug, nivolumab can be prescribed by any qualified health care professional.

In addition to standard clinical use, at Weill Cornell Medicine we are continuing to study nivolumab and other immunotherapy drugs. For more information about nivolumab or immunotherapy drugs in general, please contact us at 212-746-2919 to make an appointment or with any questions regarding clinical trials or sign up for our newsletter.

Dr. John Leonard on Treating Patients with Relapsed Follicular Lymphoma

In this video from OncLive, Lymphoma Program Director, Dr. John Leonard discusses treatment considerations for patients with relapsed follicular lymphoma.