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TURNING ON ITSELF

After mice were made allergic to a protein, researchers injected the same protein into mouse lungs to cause a disease that mimics asthma. The lung tissue of normal mice (left) shows more severe inflammation than that of mice lacking the gene for the DR3 receptor (right). Because DR3 plays a crucial role in immune cells attacking healthy tissue, the receptor may be a target for drugs that treat autoimmune disorders like asthma or multiple sclerosis. Credit: Siegel, Françoise Meylan

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