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Researchers discover how to shutdown cancer's powerful master protein
Date:3/3/2013

NEW YORK (March 3, 2013) -- The powerful master regulatory transcription factor called Bcl6 is key to the survival of a majority of aggressive lymphomas, which arise from the B-cells of the immune system. The protein has long been considered too complex to target with a drug since it is also crucial to the healthy functioning of many immune cells in the body, not just B cells gone bad.

But now, in the journal Nature Immunology, researchers at Weill Cornell Medical College report that it is possible to shut down Bcl6 in the cancer, known as diffuse large B-cell lymphoma (DLBCL), while not affecting its vital function in T cells and macrophages that are needed to support a healthy immune system.

"The finding comes as a very welcome surprise," says the study's lead investigator, Dr. Ari Melnick, Gebroe Family Professor of Hematology/Oncology and director of the Raymond and Beverly Sackler Center for Biomedical and Physical Sciences at Weill Cornell.

"This means the drugs we have developed against Bcl6 are more likely to be significantly less toxic and safer for patients with this cancer than we realized," says Dr. Melnick, who is also a hematologist-oncologist at NewYork-Presbyterian Hospital/Weill Cornell Medical Center.

If Bcl6 is completely inhibited, patients might suffer from systemic inflammation and atherosclerosis. Weill Cornell researchers conducted this new study to help clarify possible risks, as well as to understand how Bcl6 controls the various aspects of the immune system.

DLBCL is the most common subtype of non-Hodgkin lymphoma -- the seventh most frequently diagnosed cancer -- and many of these patients are resistant to currently available treatments.

"Scientists have been searching for the right answer to treat this difficult lymphoma, which, after initial treatment, can be at high risk of relapse and resistant to current therapies," Dr. Melnick says. "Believing that Bcl6 could not b
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Contact: Lauren Woods
Law2014@med.cornell.edu
646-317-7401
Weill Cornell Medical College
Source:Eurekalert

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