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Ontario Cancer Institute, US scientists discover compound that kills lymphoma cells

An international research team co-led by the Ontario Cancer Institute (OCI) has discovered a compound that kills specific lymphoma cells a discovery that will accelerate developing targeted drugs to fight the most common form of non-Hodgkins lymphoma.

The research findings, published online today in Cancer Cell (DOI 0.1016/j.ccr.2009.12.050), show how the scientists used a chemical compound to block protein BCL6, the cancer-causing culprit in about half of all non-Hodgkins lymphoma cases, the fifth most common type of cancer in Canadians.

Co-principal investigator Dr. Gilbert Priv, an OCI senior scientist who specializes in analyzing the structure and function of cancer-related proteins, says: "We have identified a new avenue for drug development. It is exciting because until now, the prevailing wisdom has been that cancer proteins such as BCL6 would not respond in this way to chemical manipulation. We have proven otherwise."

The scientists began their quest using three-dimensional crystallography and computer-aided drug design to filter over one million potential compounds to about 100 that merited further research. They continued narrowing the field, down to 10 and, eventually, to the one compound that proved successful. In lab experiments, there was even better news not only did the compound kill lymphoma cells, it was also non-toxic.

Dr. Priv explains further: "If you picture cell proteins as a circuit board, we have found a way to short-circuit a defective connection without destroying the entire board. This is the potential of targeted therapy to kill specific cancer cells and leave healthy cells untouched."


Contact: Jane Finlayson
University Health Network

Page: 1

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