Neutrophil Elastase in Fat Tissue (image) Sanford-Burnham Medical Research Institute Caption Left: In fat tissue from a lean mouse, neutrophil elastase and a1-antitrypsin levels are balanced. Right: In fat tissue from an obese mouse, they are imbalanced -- neutrophil elastase levels are high (dark staining) and a1-antitrypsin levels are low. Credit Sanford-Burnham Medical Research Institute Usage Restrictions Free to use in conjunction with this study only, using provided caption and credit. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.