DNGR-1-tracing marks an ependymal cell subset with damage-responsive neural stem cell potential
Bruno Frederico1, Isaura Martins2, Diana Chapela3
1Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
Developmental Cell
|August 23, 2022
Summary
Scientists discovered a specific type of ependymal cell in the central nervous system (CNS) that can regenerate after injury. These latent neural stem cells offer new possibilities for CNS repair and understanding brain regeneration.
Area of Science:
- Neuroscience
- Stem Cell Biology
- Developmental Biology
Background:
- Mammalian tissue regeneration relies on cells with latent stem abilities.
- The presence of such regenerative cells within the central nervous system (CNS) is debated.
- Ependymal cells line cerebrospinal fluid (CSF)-filled compartments throughout the CNS.
Purpose of the Study:
- To investigate the regenerative potential of cells within the mammalian CNS.
- To identify and characterize CNS cells capable of contributing to tissue repair after damage.
- To explore the lineage and fate of specific ependymal cell populations.
Main Methods:
- Utilized DNGR-1 lineage tracing in mice to track specific cell populations.
- Examined cell development from embryogenesis (E11.5) through adulthood.
- Investigated cellular responses to CNS injury and in vitro culture conditions.
Main Results:
- Identified a subset of ependymal cells with latent regenerative potential.
- These DNGR-1 lineage-traced ependymal cells form a continuous sheet from brain to spinal cord.
- In adult mice, these cells are quiescent but can trans-differentiate upon CNS injury or specific culture.
Conclusions:
- Revealed previously unrecognized heterogeneity within ependymal cells.
- Identified a specific ependymal cell subset across the entire CNS possessing damage-responsive neural stem cell potential.
- These findings open new avenues for understanding and promoting CNS regeneration.
