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Birds appear to lack important anti-inflammatory protein


PhysOrg

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From bird flu to the West Nile virus, bird diseases can have a vast impact on humans. Thus, understanding bird immune systems can help people in a variety of ways, including protecting ourselves from disease and protecting our interests in birds as food animals. An important element in the immune system of many animals' immune systems—including mammals, reptiles, amphibians, and most animals with a backbone—is a protein called tristetraprolin, or TTP. TTP plays an anti-inflammatory role, largely through keeping another protein, called tumor necrosis factor alpha (TNF), in check. Studies have shown that mice bred without TTP develop chronic inflammation that affects their entire bodies. Even animals missing TTP in just one immune cell type develop a catastrophic and deadly inflammation when they're exposed to tiny amounts of a molecule from bacteria, underlying the importance of this protein. And yet, researchers have not been able to find TTP in birds.

 

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