... metalloproteinases and matrix metalloproteinase inhibitors in acute lung injury Hum Pathol 2006; 37:422-430 Hammer J, Numa A, Newth CJ Acute respiratory distress syndrome caused by respiratory syncytial virus ... M, Cleroux P, Tremblay P, et al Increased proteolytic activity and matrix metalloproteinase expression in lungs during infection by porcine reproductive and respiratory syndrome virus J Gen Virol ... for the study included immunosuppresion (recent steroids or cytotoxic therapy), transplantation or failure to obtain study consent Definition of Acute Lung Injury ALI was defined as hypoxemia (ALI...