期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 104, 期 45, 页码 17837-17842出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0703240104
关键词
adult stem cells; floor plate; migration; guidance
资金
- PHS HHS [R01 N546724] Funding Source: Medline
Adult neural progenitor cells (aNPCs) exhibit limited migration in vivo with the exception of the rostral migratory stream and injury-induced movement. Surprisingly little is known regarding those signals regulating attraction or inhibition of the aNPC. These studies demonstrate that aNPCs respond principally to a repulsive cue expressed at the embryonic floor plate (FIR) and also the injured adult CNS. Adult spinal cord progenitor cells (aSCPs) were seeded onto organotypic slice preparations of the intact embryonic or injured adult spinal cord. Cell migration assays combined with genetic and molecular perturbation of FP-derived migration cues or aSCP receptors establish netrin-1 (Ntn-1) but not Slit-2, Shh, or Ephrin-B3 as the primary FP-derived repellant. When slices were prepared from injured spinal cord, aSCP migration away from the injury core was Ntn-1-dependent. These studies establish Ntn-1 as a critical regulator of aSCP migration in the intact and injured CNS.
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