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Journal Articles Journal of Biological Chemistry Year : 2006

A critical role for calponin 2 in vascular development.

Jian Tang
  • Function : Author
Guang Hu
  • Function : Author
Jun-Ichi Hanai
  • Function : Author
Ganesh Yadlapalli
  • Function : Author
Yanfeng Lin
  • Function : Author
Bo Zhang
  • Function : Author
  • PersonId : 756921
  • IdRef : 224995995
Jenna Galloway
  • Function : Author
Nathan Bahary
  • Function : Author
Sonia Sinha
  • Function : Author
Jian-Ping Jin
  • Function : Author
Leonard I Zon
  • Function : Author
Vikas P Sukhatme
  • Function : Author


Calponin 2 (h2 calponin, CNN2) is an actin-binding protein implicated in cytoskeletal organization. We have found that the expression of calponin 2 is relatively restricted to vasculature from 16 to 30 h post-fertilization during zebrafish (Danio rerio) development. Forty-eight hours after injecting antisense morpholino oligos against calponin 2 into embryos at the 1-4-cell stage, zebrafish demonstrated various cardiovascular defects, including sluggish axial and head circulation, absence of circulation in intersegmental vessels and in the dorsal longitudinal anastomotic vessel, enlarged cerebral ventricles, and pericardial edema, in addition to an excess bending, spiraling tail and twisting of the caudal fin. Knockdown of calponin 2 in the Tg(fli1:EGFP)(y1) zebrafish line (in which a fli1 promoter drives vascular-specific enhanced green fluorescent protein expression) indicated that diminished calponin 2 expression blocked the proper migration of endothelial cells during formation of intersegmental vessels. In vitro studies showed that basic fibroblast growth factor-induced human umbilical vein endothelial cell migration was down-regulated by knockdown of calponin 2 expression using an antisense adenovirus, and overexpression of calponin 2 enhanced migration and hastened wound healing. These events were correlated with activation of mitogen-activated protein kinase; moreover, inhibition of this pathway blocked the promigratory effect of calponin 2. Collectively, these data suggest that calponin 2 plays an important role in the migration of endothelial cells both in vivo and in vitro and that its expression is critical for proper vascular development.

Dates and versions

hal-00188161 , version 1 (15-11-2007)



Jian Tang, Guang Hu, Jun-Ichi Hanai, Ganesh Yadlapalli, Yanfeng Lin, et al.. A critical role for calponin 2 in vascular development.. Journal of Biological Chemistry, 2006, 281 (10), pp.6664-72. ⟨10.1074/jbc.M506991200⟩. ⟨hal-00188161⟩
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