Gene expression profile of the regeneration epithelium during axolotl limb regeneration

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Abstract
Urodele amphibians are unique among adult vertebrates in their ability to regenerate missing limbs. The process of limb regeneration requires several key tissues including a regeneration‐competent wound epidermis called the regeneration epithelium (RE). We used microarray analysis to profile gene expression of the RE in the axolotl, a Mexican salamander. A list of 125 genes and expressed sequence tags (ESTs) showed a ≥1.5‐fold expression in the RE than in a wound epidermis covering a lateral cuff wound. A subset of the RE ESTs and genes were further characterized for expression level changes over the time‐course of regeneration. This study provides the first large scale identification of specific gene expression in the RE. Developmental Dynamics 240:1826–1840, 2011.

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