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White blood cells from cancer-resistant mice cure cancers in ordinary mice

WINSTON-SALEM, N.C. White blood cells from a strain of cancer-resistant mice cured advanced cancers in ordinary laboratory mice, researchers at Wake Forest University School of Medicine reported today.

"Even highly aggressive forms of malignancy with extremely large tumors were eradicated," Zheng Cui, M.D., Ph.D., and colleagues reported in this week's on-line edition of Proceedings of the National Academy of Sciences.

The transplanted white blood cells not only killed existing cancers, but also protected normal mice from what should have been lethal doses of highly aggressive new cancers.

"This is the very first time that this exceptionally aggressive type of cancer was treated successfully," said Cui. "Never before has this been done with any other therapy."

The original studies on the cancer-resistant mice reported in 2003 showed that such resistance could be inherited, which had implications for inheritance of resistance in humans, said Mark C. Willingham, M.D., a pathologist and co-investigator. "This study shows that you can use this resistant-cell therapy in mice and that the therapy works. The next step is to understand the exact way in which it works, and perhaps eventually design such a therapy for humans."

The cancer-resistant mice all stem from a single mouse discovered in 1999. "The cancer resistance trait so far has been passed to more than 2,000 descendants in 14 generations," said Cui, associate professor of pathology. It also has been bred into three additional mouse strains. About 40 percent of each generation inherits the protection from cancer.

The original group of cancer-resistant mice, also described in Proceedings of the National Academy of Sciences, successfully fought off a range of virulent transplanted cancers.

"Now we know that we can take white blood cells from this strange mouse and put them into a normal mouse and these cells will still kill cancers," said Willingham, professor of pathology and h
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Contact: Robert Conn
rconn@wfubmc.edu
336-716-4587
Wake Forest University Baptist Medical Center
8-May-2006


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