Nov 29, 2007

Migration of mesenchymal cell fated to blastema is necessary for fish fin regeneration

Development, Growth & Differentiation
Yuki NakataniAkira Kudo

Abstract

Urodeles and fish have higher regeneration ability in a variety of tissues and organs than do other vertebrate species including mammals. Though many studies have aimed at identifying the cellular and molecular basis for regeneration, relatively little is known about the detailed cellular behaviors and involved molecular basis. In the present study, a small molecule inhibitor was used to analyzed the role of phosphoinositide 3-kinase (PI3K) signaling during regeneration. We showed that the inhibitor disrupted the formation of blastema including the expression of characteristic genes. The failure of blastema formation was due to the impaired migration of mesenchymal cells to the distal prospective blastema region, although it had a little affect on cell cycle activation in mesenchymal cells. Moreover, we found that the epidermal remodeling including cell proliferation, distal cell migration and Akt phosphorylation was also affected by the inhibitor, implying a possible involvement of epidermis for proper formation of blastema. From these data, we propose a model in which distinct signals that direct the cell cycle activation, mesenchymal cell migration and epidermal remodeling coordinate together to accomplish the correct blaste...Continue Reading

  • References53
  • Citations6

References

Mentioned in this Paper

Vertebrates
Fin Regeneration
Phosphatidylinositols
Phosphatidylinositol 3-Kinases
Cell Motility
Bone Marrow Stromal Cells
Blastema
Protein Phosphorylation
Androstadienes
Organ

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