The somite-secreted factor Maeg promotes zebrafish embryonic angiogenesis
- Wang, X., Yuan, W., Wang, X., Qi, J., Qin, Y., Shi, Y., Zhang, J., Gong, J., Dong, Z., Liu, X., Sun, C., Chai, R., Le Noble, F., Liu, D.
- Oncotarget 7(47): 77749-77763 (Journal)
- Registered Authors
- Dong, Zhangji, Gong, Jie, le Noble, Ferdinand, Qi, Jialing, Qin, Yinyin, Shi, Yunwei, Wang, Xin, Yuan, Wei
- Maeg, Notch, angiogenesis, integrin, zebrafish
- MeSH Terms
- Gene Expression Regulation, Developmental
- Gene Knockout Techniques
- MAP Kinase Signaling System
- Membrane Glycoproteins/genetics*
- Neovascularization, Physiologic*
- Receptors, Notch/metabolism
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism
- 27780917 Full text @ Oncotarget
Wang, X., Yuan, W., Wang, X., Qi, J., Qin, Y., Shi, Y., Zhang, J., Gong, J., Dong, Z., Liu, X., Sun, C., Chai, R., Le Noble, F., Liu, D. (2016) The somite-secreted factor Maeg promotes zebrafish embryonic angiogenesis. Oncotarget. 7(47):77749-77763.
MAM and EGF containing gene (MAEG), also called Epidermal Growth Factor-like domain multiple 6 (EGFL6), belongs to the epidermal growth factor repeat superfamily. The role of Maeg in zebrafish angiogenesis remains unclear. It was demonstrated that maeg was dynamically expressed in zebrafish developing somite during a time window encompassing many key steps in embryonic angiogenesis. Maeg loss-of-function embryos showed reduced endothelial cell number and filopodia extensions of intersegmental vessels (ISVs). Maeg gain-of-function induced ectopic sprouting evolving into a hyperbranched and functional perfused vasculature. Mechanistically we demonstrate that Maeg promotes angiogenesis dependent on RGD domain and stimulates activation of Akt and Erk signaling in vivo. Loss of Maeg or Itgb1, augmented expression of Notch receptors, and inhibiting Notch signaling or Dll4 partially rescued angiogenic phenotypes suggesting that Notch acts downstream of Itgb1. We conclude that Maeg acts as a positive regulator of angiogenic cell behavior and formation of functional vessels.
Genes / Markers
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Engineered Foreign Genes
Errata and Notes