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Experimental drug combination selectively destroys lymphoma cells
Date:2/6/2013

Laboratory experiments conducted by scientists at Virginia Commonwealth University Massey Cancer Center suggest that a novel combination of the drugs ibrutinib and bortezomib could potentially be an effective new therapy for several forms of blood cancer, including diffuse large B-cell lymphoma (DLBCL) and mantle cell lymphoma (MCL).

The study, published in the British Journal of Hematology, showed that the experimental drug combination killed cancer cells through a form of cell suicide known as apoptosis, but was relatively non-toxic to normal, healthy cells. Ibrutinib is a new agent that inhibits the B-cell receptor (BCR) signaling complex, which plays an important role in the survival of malignant B-cells. It has shown very promising initial results in the treatment of patients with B-cell malignancies, including chronic lymphocytic leukemia (CLL), DLBCL and MCL. The synergistic interaction of the two drugs proved lethal even to lymphoma cells that had become resistant to bortezomib, when used alone.

"Bortezomib is currently used to treat MCL and multiple myeloma, but, unfortunately, many patients develop resistance to the drug," says the study's principle investigator Steven Grant, M.D., Shirley Carter Olsson and Sture Gordon Olsson Chair in Oncology Research, associate director for translational research, program co-leader of Developmental Therapeutics and Cancer Cell Signaling research member at VCU Massey Cancer Center. "We are hopeful that this combination therapy may circumvent such resistance and eventually help fill an urgent need for more effective therapies for patients with these uncommon blood disorders."

With cultured DLBCL and MCL cells in laboratory experiments spearheaded by Girija Dasmahapatra, Ph.D., lead author of the study's manuscript and instructor in the Department of Internal Medicine at VCU School of Medicine, the scientists found that ibrutinib blocked several molecular pathways that the cancer ce
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Contact: John Wallace
wallacej@vcu.edu
804-628-1550
Virginia Commonwealth University
Source:Eurekalert  

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