References
Query Results -- Details
MGI Accession ID: MGI:3688694
J Number: J:114282
Other Accession IDs:
Title: Plasminogen activators direct reorganization of the liver lobule after acute injury.
Authors: Bezerra JA; Currier AR; Melin-Aldana H; Sabla G; Bugge TH; Kombrinck KW; Degen JL
Journal: Am J Pathol
Volume: 158
Issue: 3
Date: 2001 Mar
Year: 2001
Pages: 921-9
Review Status: Peer Reviewed
Abstract:
Tissue repair requires an adequate cellular proliferation coordinated with the timely proteolysis of matrix elements. Based on the properties of plasminogen activators in liver cell proliferation and tissue proteolysis, we explored the regulatory role of tissue-type plasminogen activator (tPA) and urokinase-type plasminogen activator (uPA) in liver repair. Using carbon tetrachloride (CCl(4)) intoxication as a model of acute liver injury, we found that tPA-deficient mice displayed a mild defect in hepatic repair, whereas livers of uPA-deficient mice had a more substantial delay in repair, with injury of centrilobular hepatocytes persisting up to 14 days after CCl(4). Notably, functional cooperativity between plasminogen activators was strongly inferred from the profound reparative defect in livers of mice lacking tPA and uPA simultaneously, with persistence of centrilobular injury as far out as 35 days. The defective repair was not because of increased susceptibility of experimental mice to the toxin or to inadequate cellular proliferation. Instead, lack of plasminogen activators led to the accumulation of fibrin and fibronectin within injured areas and poor removal of necrotic cells. These data demonstrate that tPA and uPA play a critical role in hepatic repair via proteolysis of matrix elements and clearance of cellular debris from the field of injury.
Additional Information:
