5 Groups BF (n 8) BF celecoxib (n H/F (n 22) H/F celecoxib (n *P Mortality (%) 0 11.0 22.7 40.9â NEC (%) 0 25.0 35.3 84.6* Mean NEC grade NA 0.5 0.10 1.0 0.25 1.75 0.36 0.08 by 9) 22) 0.02 vs all groups by Fisherâs Exact; â P expression appears to have a protective effect on the gut mucosa via the production of cytoprotective prostaglandins. Upregulation of mucosal COX-2 following stress, such as hypoxia and formula feeding, may be a compensatory mechanism to maintain mucosal ASSOCIATION FOR ACADEMIC SURGERYâABSTRACTS integrity and gut barrier function. Dysregulation and/or dysfunction of COX-2 in the neonatal intestine may contribute to the pathogenesis of NEC. 6. Neutral Endopeptidase Is a Determinant of Severity in a Model of Pancreatitis-Associated Lung Injury. A. M. Lightner, M.D., T. H. Jordan, B.S., C. M. Jaffray, M.D., E. F. Grady, Ph.D., and K. S. Kirkwood, M.D. University of California at San Francisco, San Francisco, California. Intraperitoneal pancreatic elastase induces lung injury similar to pancreatitis-associated lung injury by an unknown mechanism that may involve neurogenic inï¬ammation. Neutral endopeptidase (NEP) is a cell-surface metalloprotease that preferentially degrades the proinï¬ammatory neuropeptide substance P. Inhibition of NEP has been shown
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