The mouse dorsal skinfold chamber as a model for the study of thrombolysis by intravital microscopy.: Thrombolysis imaging in the mouse skinfold chamber

Abstract : Although intravital microscopy models of thrombosis in mice have contributed to dissect the mechanisms of thrombus formation and stability, they have not been well adapted to study long-term evolution of occlusive thrombi. Here, we assessed the suitability of the dorsal skinfold chamber (DSC) for the study of thrombolysis and testing of thrombolytic agents by intravital microscopy. We show that induction of FeCl3-induced occlusive thrombosis is achievable in microvessels of DSCs, and that thrombi formed in DSCs can be visualised by intravital microscopy using brightfield transmitted light, or fluorescent staining of thrombus components such as fibrinogen, platelets, leukocytes, and von Willebrand factor. Direct application of control saline or recombinant tissue-plasminogen activator (rtPA) to FeCl3-produced thrombi in DSCs did not affect thrombus size or induce recanalisation. However, in the presence of hirudin, rtPA treatment caused a rapid dose-dependent lysis of occlusive thrombi, resulting in recanalisation within 1 hour after treatment. Skin haemorrhage originating from vessels located inside and outside the FeCl3-injured area was also observed in DSCs of rtPA-treated mice. We further show that rtPA-induced thrombolysis was enhanced in plasminogen activator inhibitor-1-deficient (PAI-1-/-) mice, and dropped considerably as the time between occlusion and treatment application increased. Together, our results show that by allowing visualization and measurement of thrombus lysis and potential bleeding complications of thrombolytic treatments, the DSC provides a model for studying endogenous fibrinolysis and for first-line screening of thrombolytic agents. Furthermore, using this system, we found that thrombin and clot aging impair the thrombolytic action of rtPA towards FeCl3-produced thrombi.
Type de document :
Article dans une revue
Thrombosis and Haemostasis, Schattauer, 2012, 107 (5), pp.962-71. 〈10.1160/TH11-10-0705〉
Liste complète des métadonnées

Littérature citée [35 références]  Voir  Masquer  Télécharger

http://www.hal.inserm.fr/inserm-00699029
Contributeur : Benoit Ho Tin Noé <>
Soumis le : vendredi 18 mai 2012 - 17:58:10
Dernière modification le : lundi 4 décembre 2017 - 10:36:44
Document(s) archivé(s) le : dimanche 19 août 2012 - 02:26:26

Fichiers

inserm-00699029_edited.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Yacine Boulaftali, Lamia Lamrani, Marie-Catherine Rouzaud, Stéphane Loyau, Martine Jandrot-Perrus, et al.. The mouse dorsal skinfold chamber as a model for the study of thrombolysis by intravital microscopy.: Thrombolysis imaging in the mouse skinfold chamber. Thrombosis and Haemostasis, Schattauer, 2012, 107 (5), pp.962-71. 〈10.1160/TH11-10-0705〉. 〈inserm-00699029〉

Partager

Métriques

Consultations de la notice

416

Téléchargements de fichiers

595