Protective role of antithrombin in mouse models of liver injury
| Autor: | Javier Corral, Raúl Teruel, Irene Martínez-Martínez, María Eugenia de la Morena-Barrio, Vicente Vicente, José A. Guerrero, Isabel Arcas, Constantino Martínez |
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| Rok vydání: | 2012 |
| Předmět: |
medicine.medical_specialty
Aspartate transaminase Inflammation Apoptosis Antithrombins Liver disease Mice Internal medicine medicine Animals Anoikis Carbon Tetrachloride Cells Cultured Liver injury Mice Knockout Hepatology biology business.industry Antithrombin Hydrogen Peroxide medicine.disease Mice Inbred C57BL Disease Models Animal Endocrinology Alanine transaminase Immunology biology.protein Hepatocytes medicine.symptom Chemical and Drug Induced Liver Injury business medicine.drug |
| Zdroj: | Journal of hepatology. 57(5) |
| ISSN: | 1600-0641 |
| Popis: | Background & Aims Coagulopathy caused by an imbalance of hemostatic factors is associated with the pathophysiology of liver disease. We have investigated the role of antithrombin (AT), a key anticoagulant serpin, in the onset of liver disease. Methods Liver injury was induced by CCl 4 injection and bile duct ligation (BDL) in wild type (WT) and AT-deficient ( AT +/− ) mice. Twenty-four hours after CCl 4 treatment, aspartate-transaminase, alanine-transaminase, liver lesion size, leukocyte infiltration, and apoptosis were reduced in WT animals compared to AT +/− mice. Results Administration of exogenous AT in AT +/− animals did not restore the values observed in WT mice, suggesting that intrahepatic AT might also offer protection against CCl 4 . In the BDL model, increased liver injury was also evident in AT +/− compared to WT mice. An 85kDa covalent complex involving AT was identified in immunoblottings of liver lysates from CCl 4 -treated animals. This complex was also present in anoikis hepatocytes and H 2 O 2 -treated HepG2 cells, suggesting a role for AT in apoptosis. Expression of recombinant WT–AT by HEK-EBNA cells increased cell survival while expression of AT mutants, ΔR393 and R47C, did not modify viability. Finally, plasma anti-FXa activity was attenuated by liver injury, with AT +/− animals showing a greater reduction than WT mice. Conclusions Our study reveals a protective role of AT against liver injury due to its recognized anticoagulant and anti-inflammatory action. AT may also act via a previously unrecognized antiapoptotic effect. The clinical implications of AT deficiency in patients with liver disease should be further addressed. |
| Databáze: | OpenAIRE |
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