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Science 6 December 2002:
Vol. 298. no. 5600, pp. 1993 - 1996
DOI: 10.1126/science.1077804
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Reports

Ectoderm to Mesoderm Lineage Switching During Axolotl Tail Regeneration

Karen Echeverri, Elly M. Tanaka*

Foreign environments may induce adult stem cells to switch lineages and populate multiple tissue types, but whether this mechanism is used for tissue repair remains uncertain. Urodele amphibians can regenerate fully functional, multitissue structures including the limb and tail. To determine whether lineage switching is an integral feature of this regeneration, we followed individual spinal cord cells live during tail regeneration in the axolotl. Spinal cord cells frequently migrate into surrounding tissue to form regenerating muscle and cartilage. Thus, in axolotls, cells switch lineage during a real example of regeneration.

Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, D-01307 Dresden, Germany.
*   To whom correspondence should be addressed. E-mail: tanaka{at}mpi-cbg.de

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