Tissue specific reactions to positional discontinuities in the regenerating axolotl limb.
Tissue specific reactions to positional discontinuities in the regenerating axolotl limb.
复制标题
对再生蝾螈肢体位置不连续性的组织特异性反应。
DOI：
10.1002/reg2.35
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Seifert,AshleyW
中科院分区：
文献类型：
--
作者：
Maden,Malcolm;Avila,Daima;Roy,Molly;Seifert,AshleyW
We investigated cellular contributions to intercalary regenerates and 180osupernumerary limbs during axolotl limb regeneration using the cell autonomous green fluorescent protein marker and exchanged blastemas between white and green fluorescent protein animals. After distal blastemas were grafted to proximal levels tissues of the intercalary regenerate behaved independently with regard to the law of distal transformation; graft epidermis was replaced by stump epidermis, muscle‐derived cells, blood vessels, and Schwann cells of the distal blastema moved proximally to the stylopodium and cartilage and dermal cells conformed to the law. After 180orotation, blastemas showed contributions from stump tissues which failed to alter patterning of the blastema. Supernumerary limbs were composed of stump and graft tissues and extensive contributions of stump tissues generated inversions or duplications of polarity to produce limbs of mixed handedness. Tail skeletal muscle and cardiac muscle broke the law with cells derived from these tissues exhibiting an apparent anteroposterior polarity as they migrated to the anterior side of the blastema. We attribute this behavior to the possible presence of a chemotactic factor from the wound epidermis.
