Dr. Min Xu is on the verge of an advance in the science of cancer detection.

by Meredith Guinness

Dr. Min Xu, associate professor of physics, and his team of gifted student researchers have been in the lab all summer at Fairfield, working toward a new cancer detection and classification technique that could revolutionize the way doctors diagnose and treat the disease.

The idea seems almost simplistic: Dr. Xu and his team are trying to use light and state-of-the-art microscope technology to detect and grade cancers, about 90 percent of which begin at the most superficial layers of organs, layers that light can penetrate.

The inventive research relies on back-scatter tomography technology – similar to the body scanning machines at airport security checkpoints – and complicated algorithms to detect abnormalities in cell nucleae, early markers of cancer.

Unlike conventional biopsy, which requires removal of tissue and the eventual death of the cells, Dr. Xu’s method would allow for non-invasive, safe, and inexpensive detection by viewing the way light interacts with tissue. It would also allow doctors to determine the grade of the disease – how far it has progressed – plan appropriate treatment, and track the cancer’s progress or decline in living cells, Dr. Xu said.

“Treatment is awfully different for different grades,” he said. “We are trying to define the grades so you can have better treatment. It’s a kind of optical biopsy or the sensing of structural change when cancer starts. We’re looking at the physical ‘signature,’ the way, say, the nuclei changes with cancer cells.”

Dr. Xu, who holds a Ph.D. from City College and Graduate Center of City University of New York and bachelor’s and master’s degrees from Fudan University in Shanghai, China, has been working on aspects of biomedical optics for several years. Since coming to Fairfield in 2006, he has had a share in several prestigious grants toward his research, including $542,960 from the U.S. Army Medical Research and Material Command, $298,600 from the Department of Defense, $219,396 from the National Institutes of Health, and two Research Corporation grants for his current work.

Biomedical optics poses a real opportunity for the medical field, he said, and the competition is fierce to make a breakthrough. The reason? While ultrasound is good for penetrating tissue, the images produced are poor. Other methods, such as X-rays, give good images, but can be harmful and are inappropriate for use on some individuals, including infants. As a result, researchers are looking for safe, effective alternatives. “The field is expanding very rapidly,” said Dr. Xu. “People always want to see better, to see smaller. With light you can see things you couldn’t before.”

It’s easy to pass by Dr. Xu’s lab in Bannow Science Center, assuming it is closed. His team often works in the dark, shining beams of light on both the polystyrene spheres they use as a control and slides of cancer cells they magnify under a Zeiss microscope they have modified for their purposes.

Dr. Xu’s work offers a unique opportunity for his students. Some, like Patrick Shanley ’12, a physics major from Wantagh, New York, and Bianca De Angelo ’12, a physics major from Warwick, R.I., have been working in Dr. Xu’s lab for three summers. They spend their days running algorithms and studying the optical signature of cancer cells, looking for trends in the light-scattering spectrum they see to firm up their theories.

Jared Buckley ’12 is also part of the research team: “I have an algorithm that runs for 15 minutes and some days I would run it eight or nine times a day and just sit there waiting for it to give me an answer,” said Buckley, a physics major from Easton, Mass.

Tedious? Yes. But these undergraduates realize that working with Dr. Xu on such cutting-edge research is invaluable, especially at a relatively small, liberal arts university.

“It’s very beneficial to students,” Dr. Xu said of student research. “You want them to compete in the market and to get experience in how to do the work, how to solve a problem. It’s only by having your hands dirty. I tell them, “Okay, you did it. Now do it again’ and then ‘Okay, do it again.’ And they are amazed. They say, Oh! I get it now!’ It’s about persistence.”

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