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Key immune cell may play role in lung cancer susceptibility
Date:9/21/2012

umors. A third group experienced moderate tumor growth.

When the researchers depleted natural killers cells from the mice using an antibody, those that had been resistant to lung cancer developed large, aggressive tumors.

Further, in mice susceptible to lung cancer, the scientists showed that manipulating the immune system with a bone marrow transplant could significantly block the development of lung cancer. Their studies indicate that natural killer cells, not other types of immune cells like T cells or inflammatory cells, are responsible for this phenomenon.

In other types of cancers, including those of the breast, colon and prostate, T cells are capable of destroying tumor cells. But in lung cancer, scientists suspect that T cells become inactivated, which may give natural killer cells a more prominent role.

The researchers also traced the genetic diversity of the natural killer cells in the mice to a region of chromosome 6, which includes numerous genes that influence the effectiveness of these cells.

Moving forward, Krupnick and his team want to learn whether natural killer cells influence lung cancer susceptibility in people. "We need to identify those patients who are resistant to lung cancer and ask, 'What is unique about their natural killer cells are they more potent or do they produce more of them than people with lung cancer?' The answer will determine our next steps."


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Contact: Caroline Arbanas
arbanasc@wustl.edu
314-286-0109
Washington University School of Medicine
Source:Eurekalert

Page: 1 2

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