ZFIN ID: ZDB-PUB-180829-4
Integrin β1 activity is required for cardiovascular formation in zebrafish
Iida, A., Wang, Z., Hirata, H., Sehara-Fujisawa, A.
Date: 2018
Source: Genes to cells : devoted to molecular & cellular mechanisms   23(11): 938-951 (Journal)
Registered Authors: Hirata, Hiromi, Sehara-Fujisawa, Atsuko
Keywords: Zebrafish, angiogenesis, hemorrhage, integrin β1, vasculogenesis
MeSH Terms:
  • Animals
  • Animals, Genetically Modified/embryology
  • Animals, Genetically Modified/genetics
  • Animals, Genetically Modified/metabolism
  • Cardiovascular Abnormalities/genetics
  • Cardiovascular Abnormalities/metabolism
  • Cardiovascular Abnormalities/pathology*
  • Embryo, Nonmammalian/metabolism
  • Embryo, Nonmammalian/pathology*
  • Endothelium, Vascular/pathology*
  • Hemorrhage/genetics
  • Hemorrhage/metabolism
  • Hemorrhage/pathology*
  • Integrin beta1/genetics
  • Integrin beta1/metabolism*
  • Mutation*
  • Zebrafish/embryology*
  • Zebrafish/genetics
  • Zebrafish/metabolism
PubMed: 30151851 Full text @ Genes Cells
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ABSTRACT
Integrins are transmembrane molecules that facilitate cell-to-cell and cell-to-extra cellular matrix (ECM) interactions. Integrin molecules are heterodimers that consist of an α- and β-subunits. The integrin β1 gene is widely expressed in vivo and is the major β molecule in many tissues; however, tissue specific roles of integrin β1 are still elusive. In this study, we investigated integrin β1 function in endothelial cells of zebrafish. An integrin β1b mutant zebrafish exhibited morphological abnormalities in blood vessel formation, cephalic hemorrhage, and a decreased responsiveness to tactile stimulation during development. To determine the role of integrin β1b in vascular formation, we developed a Gal4/UAS-mediated conditional inactivation of integrin β1 by expressing the cytoplasmic region of integrin β1 that acts as a dominant-negative (DN) isoform. Expression of integrin β1 DN in endothelial cells induced blood vessel abnormalities as in integrin β1b mutants. These results demonstrate that endothelial cells require integrin activity for the formation and/or maintenance of blood vessels in zebrafish. Furthermore, our time-lapse recording visualized the breakpoint of cephalic vessels and the hemorrhage onset. Taken together, our tissue-specific inactivation of integrin β1 in zebrafish are powerful tools for functional analysis of integrin β1 in developing tissues. This article is protected by copyright. All rights reserved.
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