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Early stages of breast cancer could soon be diagnosed from blood samples
Date:11/14/2013

HOUSTON -- ( Nov. 14, 2013 ) -- What could someday be the first blood test for the early detection of breast cancer was shown in preliminary studies to successfully identify the presence of breast cancer cells from serum biomarkers, say the Houston Methodist Research Institute scientists who are developing the technology.

With a New York University Cancer Institute colleague, the researchers report in an upcoming Clinical Chemistry (now online) that the mixture of free-floating blood proteins created by the enzyme carboxypeptidase N accurately predicted the presence of early-stage breast cancer tissue in mice and in a small population of human patients.

"In this paper we link the catalytic activity of carboxypeptidase N to tumor progression in clinical samples from breast cancer patients and a breast cancer animal model," said biomedical engineer Tony Hu, Ph.D., who led the project. "Our results indicate that circulating peptides generated by CPN can serve as clear signatures of early disease onset and progression."

The technology is not yet available to the public, and may not be for years. More extensive clinical tests are needed, and those tests are expected to begin in early 2014.

There are currently no inexpensive laboratory tests for the early detection of breast cancer, providing the impetus for researchers around the world to invent them.

"What we are trying to create is a non-invasive test that profiles what's going on at a tissue site without having to do a biopsy or costly imaging," Hu said. "We think this could be better for patients and -- if we are successful -- a lot cheaper than the technology that exists. While there's more to the cost of administering a test than materials alone, right now those materials only cost about $10 per test."

CPN is an enzyme that modifies proteins after the proteins are first created. Past studies have only shown the enzyme is more active in lung cancer pa
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Contact: David Bricker
dmbricker@houstonmethodist.org
832-667-5811
Houston Methodist
Source:Eurekalert  

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Early stages of breast cancer could soon be diagnosed from blood samples
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