Abstract:
:Pathologic blood clotting is a leading cause of morbidity and mortality in the developed world, underlying deep vein thrombosis, myocardial infarction, and stroke. Genetic predisposition to thrombosis is still poorly understood, and we hypothesize that there are many additional risk alleles and modifying factors remaining to be discovered. Mammalian models have contributed to our understanding of thrombosis, but are low throughput and costly. We have turned to the zebrafish, a tool for high-throughput genetic analysis. Using zinc finger nucleases, we show that disruption of the zebrafish antithrombin III (at3) locus results in spontaneous venous thrombosis in larvae. Although homozygous mutants survive into early adulthood, they eventually succumb to massive intracardiac thrombosis. Characterization of null fish revealed disseminated intravascular coagulation in larvae secondary to unopposed thrombin activity and fibrinogen consumption, which could be rescued by both human and zebrafish at3 complementary DNAs. Mutation of the human AT3-reactive center loop abolished the ability to rescue, but the heparin-binding site was dispensable. These results demonstrate overall conservation of AT3 function in zebrafish, but reveal developmental variances in the ability to tolerate excessive clot formation. The accessibility of early zebrafish development will provide unique methods for dissection of the underlying mechanisms of thrombosis.
journal_name
Bloodjournal_title
Bloodauthors
Liu Y,Kretz CA,Maeder ML,Richter CE,Tsao P,Vo AH,Huarng MC,Rode T,Hu Z,Mehra R,Olson ST,Joung JK,Shavit JAdoi
10.1182/blood-2014-03-561027subject
Has Abstractpub_date
2014-07-03 00:00:00pages
142-50issue
1eissn
0006-4971issn
1528-0020pii
blood-2014-03-561027journal_volume
124pub_type
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