Epidermal closure regulates histolysis during mammalian (Mus) digit regeneration

Regeneration

Jennifer Simkin²  Mimi C. Sammarco²  Lindsay A. Dawson²  Catherine Tucker²  Louis J. Taylor²  Keith Van Meter¹ 

[1] Department of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA;Division of Developmental Biology, Department of Cell and Molecular Biology, Tulane University, New Orleans, Louisiana, USA

关键词: Blastema;    digit;    hypoxia;    mouse;    regeneration;   

DOI  :  10.1002/reg2.34

来源: Wiley

【 摘 要 】

Abstract

Mammalian digit regeneration progresses through consistent stages: histolysis, inflammation, epidermal closure, blastema formation, and finally redifferentiation. What we do not yet know is how each stage can affect others. Questions of stage timing, tissue interactions, and microenvironmental states are becoming increasingly important as we look toward solutions for whole limb regeneration. This study focuses on the timing of epidermal closure which, in mammals, is delayed compared to more regenerative animals like the axolotl. We use a standard wound closure device, Dermabond (2-octyl cyanoacrylate), to induce earlier epidermal closure, and we evaluate the effect of fast epidermal closure on histolysis, blastema formation, and redifferentiation. We find that fast epidermal closure is reliant upon a hypoxic microenvironment. Additionally, early epidermal closure eliminates the histolysis stage and results in a regenerate that more closely replicates the amputated structure. We show that tools like Dermabond and oxygen are able to independently influence the various stages of regeneration enabling us to uncouple histolysis, wound closure, and other regenerative events. With this study, we start to understand how each stage of mammalian digit regeneration is controlled.

【 授权许可】

CC BY   
© 2015 The Authors. Regeneration published by John Wiley & Sons Ltd.

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.