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The SynMuvA lin-15A licenses natural transdifferentiation by antagonizing identity safeguarding mechanisms

Sarah Becker1, Marie-Charlotte Morin1, Julien Lambert1,2

  • 1Department of Development and Stem Cells, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U1298, Université de Strasbourg, 1 rue Laurent Fries, BP 10142, 67400 Illkirch, France.

Biorxiv : the Preprint Server for Biology
|February 6, 2026
PubMed

Insights

Researchers discovered lin-15A, a novel factor in Caenorhabditis elegans, that licenses cell transdifferentiation. It works by antagonizing chromatin modifiers, enabling controlled cell identity conversion for regenerative therapies.

Area of Science:

  • Cellular plasticity mechanisms
  • Developmental biology
  • Molecular genetics

Background:

  • Cellular plasticity is crucial for cancer and regenerative medicine.
  • Understanding factors that control cell identity is incomplete.
  • Natural transdifferentiation offers insights into plasticity regulation.

Purpose of the Study:

  • Identify novel factors regulating cell transdifferentiation.
  • Investigate the role of THAP domain gene lin-15A in Caenorhabditis elegans.
  • Elucidate the mechanism by which lin-15A influences cell identity.

Main Methods:

  • Studied natural rectal-to-neuronal transdifferentiation in C. elegans.
  • Utilized genetic analysis to identify lin-15A function.
  • Investigated interactions between lin-15A and chromatin-modifying complexes.

Main Results:

  • Identified lin-15A as a novel factor in Y-to-PDA transdifferentiation.
  • Demonstrated that lin-15A antagonizes chromatin-modifying complexes.
  • Showed lin-15A acts as a context-specific 'Licenser,' not a 'Driver,' of plasticity.

Conclusions:

  • Proposed a model where 'Drivers' initiate plasticity and 'Licensers' like lin-15A facilitate it.
  • lin-15A attenuates identity safeguarding mechanisms to enable transdifferentiation.
  • Findings advance understanding of coordinated cell identity conversion for therapeutic applications.

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