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Updated: Apr 6, 2026

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CD59 mediates cartilage patterning during spontaneous tail regeneration.

Xue Bai1, Yingjie Wang1, Lili Man1

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|August 5, 2015
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CD59 regulates positional identity in lizard tail regeneration by protecting cells from complement-mediated lysis. This immune molecule is crucial for proper cartilage patterning and successful appendage regrowth.

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Area of Science:

  • Regenerative biology
  • Immunology
  • Developmental biology

Background:

  • Adult animals can regenerate complex appendages, relying on positional identity of blastemal cells.
  • CD59, a CD59/Ly6 family member, regulates positional identity in gecko tail blastema.

Purpose of the Study:

  • Investigate CD59's role in tail regeneration and PD axis patterning.
  • Determine if CD59's function is unique to amniotes.
  • Examine CD59's protective role against complement-mediated cell lysis.

Main Methods:

  • Examined gecko CD59's inhibition of complement-mediated cell lysis.
  • Used adenovirus transfection to intervene CD59 expression in tail blastemal cells.
  • Analyzed effects of CD59 overexpression and siRNA knockdown on cartilage patterning.

Main Results:

  • Gecko CD59 inhibits complement-mediated cell lysis.
  • CD59 regulates positional identity via expression in cartilage precursor cells.
  • Altering CD59 levels disrupts cartilage patterning and blastemal cell differentiation.
  • CD59 regulates genes involved in cartilage formation.

Conclusions:

  • CD59 is an evolutionarily transitional molecule linking immune and regenerative functions.
  • CD59 mediates tail regeneration by regulating cartilage patterning.
  • CD59 plays a key role in maintaining positional identity during appendage regeneration.