Document Detail

Targeted laser ablation of the zebrafish larval heart induces models of heart block, valvular regurgitation, and outflow tract obstruction.
MedLine Citation:
PMID:  25272304     Owner:  NLM     Status:  In-Data-Review    
Abstract Mammalian models of cardiac disease have provided unique and important insights into human disease but have become increasingly challenging to produce. The zebrafish could provide inexpensive high-throughput models of cardiac injury and repair. We used a highly targeted laser, synchronized to fire at specific phases of the cardiac cycle, to induce regional injury to the ventricle, atrioventricular (AV) cushion, and bulbus arteriosus (BA). We assessed the impact of laser injury on hearts of zebrafish early larvae at 72 h postfertilization, to different regions, recording the effects on ejection fraction (EF), heart rate (HR), and blood flow at 2 and 24 h postinjury (hpi). Laser injury to the apex, midzone, and outflow regions of the ventricle resulted in reductions of the ventricle EF at 2 hpi with full recovery of function by 24 hpi. Laser injury to the ventricle, close to the AV cushion, was more likely to cause bradycardia and atrial-ventricular dysfunction, suggestive of an electrical conduction block. At 2 hpi, direct injury to the AV cushion resulted in marked regurgitation of blood from the ventricle to the atrium. Laser injury to the BA caused temporary outflow tract obstruction with cessation of ventricle contraction and circulation. Despite such damage, 80% of embryos showed complete recovery of the HR and function within 24 h of laser injury. Precision laser injury to key structures in the zebrafish developing heart provides a range of potentially useful models of hemodynamic overload, injury, and repair.
Gianfranco Matrone; Sana Maqsood; Jonathan Taylor; John J Mullins; Carl S Tucker; Martin A Denvir
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Zebrafish     Volume:  11     ISSN:  1557-8542     ISO Abbreviation:  Zebrafish     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-12-04     Completed Date:  -     Revised Date:  2014-12-04    
Medline Journal Info:
Nlm Unique ID:  101225070     Medline TA:  Zebrafish     Country:  United States    
Other Details:
Languages:  eng     Pagination:  536-41     Citation Subset:  IM    
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