KLF family members regulate intrinsic axon regeneration ability.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 19815778.
- Also identified by DOI 10.1126/science.1175737 and PMC identifier 2882032.
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Abstract
Neurons in the central nervous system (CNS) lose their ability to regenerate early in development, but the underlying mechanisms are unknown. By screening genes developmentally regulated in retinal ganglion cells (RGCs), we identified Krüppel-like factor-4 (KLF4) as a transcriptional repressor of axon growth in RGCs and other CNS neurons. RGCs lacking KLF4 showed increased axon growth both in vitro and after optic nerve injury in vivo. Related KLF family members suppressed or enhanced axon growth to differing extents, and several growth-suppressive KLFs were up-regulated postnatally, whereas growth-enhancing KLFs were down-regulated. Thus, coordinated activities of different KLFs regulate the regenerative capacity of CNS neurons.
Medical subject headings
- Axons
- Kruppel-Like Transcription Factors
- Neurons
- Retinal Ganglion Cells