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Surprise: Scientists discover that inflammation helps to heal wounds
Date:10/4/2010

A new research study published in The FASEB Journal (http://www.fasebj.org) may change how sports injuries involving muscle tissue are treated, as well as how much patient monitoring is necessary when potent anti-inflammatory drugs are prescribed for a long time. That's because the study shows for the first time that inflammation actually helps to heal damaged muscle tissue, turning conventional wisdom on its head that inflammation must be largely controlled to encourage healing. These findings could lead to new therapies for acute muscle injuries caused by trauma, chemicals, infections, freeze damage, and exposure to medications which cause muscle damage as a side effect. In addition, these findings suggest that existing and future therapies used to combat inflammation should be closely examined to ensure that the benefits of inflammation are not eliminated.

"We hope that our findings stimulate further research to dissect different roles played by tissue inflammation in clinical settings, so we can utilize the positive effects and control the negative effects of tissue inflammation," said Lan Zhou, M.D., Ph.D., a researcher involved in the work from the Neuroinflammation Research Center/Department of Neurosciences/Lerner Research Institute at the Cleveland Clinic in Ohio.

Zhou and colleagues found that the presence of inflammatory cells (macrophages) in acute muscle injury produce a high level of a growth factor called insulin-like growth factor-1 (IGF-1) which significantly increases the rate of muscle regeneration. The research report shows that muscle inflammatory cells produce the highest levels of IGF-1, which improves muscle injury repair. To reach this conclusion, the researchers studied two groups of mice. The first group of mice was genetically altered so they could not mount inflammatory responses to acute injury. The second group of mice was normal. Each group experienced muscle injury
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Contact: Cody Mooneyhan
cmooneyhan@faseb.org
301-634-7104
Federation of American Societies for Experimental Biology
Source:Eurekalert

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