An approach for elucidating dermal fibroblast dedifferentiation in amphibian limb regeneration

Akira Satoh, Rena Kashimoto, Ayaka Ohashi, Saya Furukawa, Sakiya Yamamoto, Takeshi Inoue, Toshinori Hayashi, Kiyokazu Agata

Research output: Contribution to journalArticlepeer-review

Abstract

Urodele amphibians, Pleurodeles waltl and Ambystoma mexicanum, have organ-level regeneration capability, such as limb regeneration. Multipotent cells are induced by an endogenous mechanism in amphibian limb regeneration. It is well known that dermal fibroblasts receive regenerative signals and turn into multipotent cells, called blastema cells. However, the induction mechanism of the blastema cells from matured dermal cells was unknown. We previously found that BMP2, FGF2, and FGF8 (B2FF) could play sufficient roles in blastema induction in urodele amphibians. Here, we show that B2FF treatment can induce dermis-derived cells that can participate in multiple cell lineage in limb regeneration. We first established a newt dermis-derived cell line and confirmed that B2FF treatment on the newt cells provided plasticity in cellular differentiation in limb regeneration. To clarify the factors that can provide the plasticity in differentiation, we performed the interspecies comparative analysis between newt cells and mouse cells and found the Pde4b gene was upregulated by B2FF treatment only in the newt cells. Blocking PDE4B signaling by a chemical PDE4 inhibitor suppressed dermis-to-cartilage transformation and the mosaic knockout animals showed consistent results. Our results are a valuable insight into how dermal fibroblasts acquire multipotency during the early phase of limb regeneration via an endogenous program in amphibian limb regeneration.

Original languageEnglish
Article number6
JournalZoological Letters
Volume8
Issue number1
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Ambystoma mexicanum
  • Dedifferentiation
  • Limb regeneration
  • Pde4b
  • Pleurodels waltl
  • Reprogramming

ASJC Scopus subject areas

  • Animal Science and Zoology

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