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Novel treatment gives hope to lymphoma, leukemia patients

Washington, Sat, 27 Feb 2010 ANI

Washington, Feb. 27 (ANI): Researchers have offered a new hope for a new therapy for patients with certain types of lymphoma and leukemia.

 

PCI-32765 is a new drug being assessed in a Phase I clinical trial at the Virginia G. Piper Cancer Center in collaboration with the Clinical Division of the Translational Genomics Research Institute.

 

This is one of 35 such trials under way through a partnership between the Virginia G. Piper Cancer Center at Scottsdale Healthcare and TGen, which enables molecular and genomic discoveries to reach patients through Phase I trials as quickly as possible.

 

"Progress in developing new treatments for cancer has been painfully slow as only 2-4 percent of all cancer patients enroll in clinical trials. This is especially true for uncommon cancers such as leukemia's and lymphomas," said Dr. Raoul Tibes, Director of the Hematological Malignancies Program at the Virginia G. Piper Cancer Center and an Associate Investigator at TGen.

 

Participants are volunteers for whom other cancer treatments have failed.

 

"This study is going very well. It is a very promising agent," Dr. Tibes said of PCI-32765, which uniquely targets the molecular abnormalities of lymphoma cells. "This is a recently identified cancer mechanism that we are going after with this drug in lymphoma cells."

 

Bruton-tyrosine-kinase, or Btk, is an enzyme needed to maintain B-lymphocytes function. B- lymphocytes are the cells that make antibodies for the immune system.

 

Too little Btk causes a disease called Bruton's agammaglobulinemia, in which the B-lymphocytes fail to mature and produce antibodies, leading to infections.

 

Too much Btk is involved in constantly stimulating the proliferation and spread of lymphoma and leukemia cells.

 

PCI-32765, produced by Pharmacyclics of Sunnyvale, Calif., inhibits Btk. Preclinical studies showed PCI-32765 arrested cancer cell growth and caused cancer cell death.

 

"This is the Yin and Yang of two diseases," said Dr. Tibes. In one there is not enough Btk; in the other, too much. "We are exploiting a natural occurring phenomenon, an enzyme that is turned around in cancer, and now we have a drug against it."

 

Dr. Tibes, the principal investigator for the clinical trial, said PCI-32765 is at the frontier of research and offers a new therapy option for patients with advanced lymphomas and chronic lymphocytic leukemia. (ANI)

 


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