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Current Stem Cell Reports

, Volume 3, Issue 3, pp 156–163 | Cite as

The Axolotl Limb Regeneration Model as a Discovery Tool for Engineering the Stem Cell Niche

  • Negar Seyedhassantehrani
  • Takayoshi Otsuka
  • Shambhavi Singh
  • David M. GardinerEmail author
In Vitro and In Vivo Models in Stem Cell Biology (E Scott, Section Editor)
Part of the following topical collections:
  1. Topical Collection on In Vitro and In Vivo Models in Stem Cell Biology

Abstract

Purpose of Review

Recent advances in genomics and gene editing have expanded the range of model organisms to include those with interesting biological capabilities such as regeneration. Among these are the classic models of regeneration biology, the salamander. Although stimulating endogenous regeneration in humans likely is many years away, with advances in stem cell biology and biomedical engineering (e.g., bio-inspired materials), it is evident that there is great potential to enhance regenerative outcomes by approaching the problem from an engineering perspective. The question at this point is what do we need to engineer?

Recent Findings

The value of regeneration models is that they show us how regeneration works, which then can guide efforts to mimic these developmental processes therapeutically. Among these models, the accessory limb model (ALM) was developed in the axolotl as a gain-of-function assay for the sequential steps that are required for successful regeneration. To date, this model has identified a number of proregenerative signals, including growth factor signaling associated with nerves and signals associated with the extracellular matrix (ECM) that induce pattern formation.

Summary

Identification of these signals through the use of models in highly regenerative vertebrates (e.g., the axolotl) offers a wide range of possible modifications for engineering bioinspired, biomimetic materials to create a dynamic stem cell niche for regeneration and scar-free repair.

Keywords

Axolotl Regeneration Regenerative engineering Hyaluronic acid Heparan sulfate ECM 

Notes

Acknowledgments

We thank Dr. Susan V. Bryant and Dr. Ken Muneoka for insights into the importance of designing gain-of-function experiments for regeneration, and Dr. Cato Laurencin for his insights into the convergence of regeneration biology and engineering leading to the emergence of regenerative engineering for inducing human regeneration.

Compliance with Ethical Standards

Conflict of Interest

Negar Seyedhassantehrani, Takayoshi Otsuka, Shambhavi Singh, and David M. Gardiner declare that they have no conflict of interest.

Human and Animal Rights and Informed Consent

This article does not contain any studies with human or animal subjects performed by any of the authors.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Negar Seyedhassantehrani
    • 1
  • Takayoshi Otsuka
    • 1
  • Shambhavi Singh
    • 1
  • David M. Gardiner
    • 1
    Email author
  1. 1.Department of Developmental and Cell BiologyUniversity of California IrvineIrvineUSA

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