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FSU researcher using computers to hone cancer-fighting strategies
Date:7/2/2008

TALLAHASSEE, Fla. -- A Florida State University faculty member who uses computational techniques to evaluate a new class of cancer-killing drugs is attracting worldwide attention from other researchers.

Kevin C. Chen, an assistant professor of chemical and biomedical engineering at the Florida A&M University-Florida State University College of Engineering, is using high-powered computers to determine how substances known as recombinant immunotoxins can best be modified in order to attack and kill malignant tumors while doing minimal harm to a patient's healthy cells.

"Cancer is a disease of tremendous complexity, so the analysis and interpretation of data demands sophisticated, specialized computational methods," Chen said of his research.

Recombinant immunotoxins, Chen explained, are new drugs that are being tested in clinical trials for certain types of cancer therapy. They consist of tiny fragments of antibody proteins that are fused at the genetic level to toxins produced by certain types of bacteria, fungi or plants.

"Once injected into the body, the antibody portion of the immunotoxin targets specific proteins, called antigens, that are massively expressed on the surface of cancer cells," Chen said. "These cells are subsequently killed by the accompanying toxins. Normal, healthy cells, meanwhile, are not recognized and thus are spared."

That is the theory, at least. In practice, Chen acknowledges that numerous factors can decrease the immunotoxins' effectiveness. Among them:

*The large size of some immunotoxin molecules can hinder their ability to move to the targeted location to bind readily with cancer cell proteins, leading to efforts to reduce their size.

*The immunotoxin molecules' stability in the bloodstream and in the extracellular matrix can affect their length of time in circulation and in tumor tissues, respectively, thereby determining their effectiveness at killing the opt
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Contact: Kevin C. Chen
kevinchen@eng.fsu.edu
850-410-6684
Florida State University
Source:Eurekalert  

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