Abstract:
:Deep venous thrombosis (DVT) remains a common and serious cardiovascular problem with both fatal and long-term consequences. The consequences of DVT include the development of postthrombotic syndrome in 25% to 60% of DVT patients. Despite the clinical importance of venous thrombus resolution, the cellular and molecular mediators involved are poorly understood, and currently there is no molecular therapy to accelerate this process. Several lines of evidence suggest that a complex and interrelated array of molecular signaling processes are involved in the inflammatory vascular remodeling associated with the resolution of DVT. Here, we have identified a role for the tumor suppressor gene p53 in regulating venous thrombus resolution. Using the stasis model of venous thrombosis and resolution in mice, we found that genetic deficiency of p53 or pharmacologic inhibition by pifithrin impairs thrombus resolution and is associated with increased fibrosis and altered expression of matrix metalloproteinase-2. The effect of p53 loss was mediated by cells of the myeloid lineage, resulting in enhanced polarization of the cytokine milieu toward an M1-like phenotype. Furthermore, augmentation of p53 activity using the pharmacological agonist of p53, quinacrine, accelerates venous thrombus resolution in a p53-dependent manner, even after establishment of thrombosis. Together, these studies define mechanisms by which p53 regulates thrombus resolution by increasing inflammatory vascular remodeling of venous thrombi in vivo, and the potential therapeutic application of a p53 agonist as a treatment to accelerate this process in patients with DVT.
journal_name
Bloodjournal_title
Bloodauthors
Mukhopadhyay S,Antalis TM,Nguyen KP,Hoofnagle MH,Sarkar Rdoi
10.1182/blood-2016-07-727180subject
Has Abstractpub_date
2017-06-15 00:00:00pages
3245-3255issue
24eissn
0006-4971issn
1528-0020pii
blood-2016-07-727180journal_volume
129pub_type
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