ZFIN ID: ZDB-PUB-161113-13
Zebrafish Model for Functional Screening of Flow-Responsive Genes
Serbanovic-Canic, J., de Luca, A., Warboys, C., Ferreira, P.F., Luong, L.A., Hsiao, S., Gauci, I., Mahmoud, M., Feng, S., Souilhol, C., Bowden, N., Ashton, J.P., Walczak, H., Firmin, D., Krams, R., Mason, J.C., Haskard, D.O., Sherwin, S., Ridger, V., Chico, T.J., Evans, P.C.
Date: 2017
Source: Arteriosclerosis, Thrombosis, and Vascular Biology   37(1): 130-143 (Journal)
Registered Authors: Chico, Tim J., Evans, Paul C., Serbanovic-Canic, Jovana
Keywords: Zebrafish, apoptosis, atherosclerosis, endothelial cells, troponin
MeSH Terms:
  • Animals
  • Animals, Genetically Modified
  • Apoptosis*
  • Atherosclerosis/genetics*
  • Atherosclerosis/metabolism
  • Atherosclerosis/pathology
  • Atherosclerosis/physiopathology
  • Cells, Cultured
  • Embryo, Nonmammalian/blood supply
  • Endothelial Cells/metabolism*
  • Endothelial Cells/pathology
  • Female
  • Gene Expression Profiling/methods
  • Gene Expression Regulation, Developmental*
  • Gene Knockdown Techniques
  • Gene Regulatory Networks
  • Genetic Association Studies
  • Genetic Predisposition to Disease
  • Humans
  • Mechanotransduction, Cellular/genetics*
  • Mice
  • Phenotype
  • RNA Interference
  • Regional Blood Flow
  • Stress, Mechanical
  • Swine
  • Transcriptome
  • Transfection
  • Zebrafish/embryology
  • Zebrafish/genetics*
  • Zebrafish/metabolism
  • Zebrafish Proteins/genetics*
  • Zebrafish Proteins/metabolism
PubMed: 27834691 Full text @ Arterio., Thromb., and Vas. Bio.
Atherosclerosis is initiated at branches and bends of arteries exposed to disturbed blood flow that generates low shear stress. This mechanical environment promotes lesions by inducing endothelial cell (EC) apoptosis and dysfunction via mechanisms that are incompletely understood. Although transcriptome-based studies have identified multiple shear-responsive genes, most of them have an unknown function. To address this, we investigated whether zebrafish embryos can be used for functional screening of mechanosensitive genes that regulate EC apoptosis in mammalian arteries.
First, we demonstrated that flow regulates EC apoptosis in developing zebrafish vasculature. Specifically, suppression of blood flow in zebrafish embryos (by targeting cardiac troponin) enhanced that rate of EC apoptosis (≈10%) compared with controls exposed to flow (≈1%). A panel of candidate regulators of apoptosis were identified by transcriptome profiling of ECs from high and low shear stress regions of the porcine aorta. Genes that displayed the greatest differential expression and possessed 1 to 2 zebrafish orthologues were screened for the regulation of apoptosis in zebrafish vasculature exposed to flow or no-flow conditions using a knockdown approach. A phenotypic change was observed in 4 genes; p53-related protein (PERP) and programmed cell death 2-like protein functioned as positive regulators of apoptosis, whereas angiopoietin-like 4 and cadherin 13 were negative regulators. The regulation of perp, cdh13, angptl4, and pdcd2l by shear stress and the effects of perp and cdh13 on EC apoptosis were confirmed by studies of cultured EC exposed to flow.
We conclude that a zebrafish model of flow manipulation coupled to gene knockdown can be used for functional screening of mechanosensitive genes in vascular ECs, thus providing potential therapeutic targets to prevent or treat endothelial injury at atheroprone sites.