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The Journal of Neuroscience, November 15, 2006, 26(46):12089-12099; doi:10.1523/JNEUROSCI.3047-06.2006
Previous Article
Development/Plasticity/Repair
Leukemia Inhibitory Factor Promotes Neural Stem Cell Self-Renewal in the Adult Brain
Sylvian Bauer and
Paul H. Patterson
Biology Division, California Institute of Technology, Pasadena, California 91125
Correspondence should be addressed to Paul H. Patterson, Biology Division, 216-76, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125. Email: php{at}caltech.edu
Although neural stem cells (NSCs) persist in various areas of the adult brain, their contribution to brain repair after injury is very limited. Treatment with exogenous growth factors can mitigate this limitation, suggesting that the brain environment is normally deficient in permissive cues and that it may be possible to stimulate the latent regenerative potential of endogenous progenitors with appropriate signals. We analyzed the effects of overexpressing the cytokine leukemia inhibitory factor (LIF) on adult neurogenesis in the normal brain. We found that LIF reduces neurogenesis in the olfactory bulb and subventricular zone by acting directly on NSCs. LIF appears to promote NSC self-renewal, preventing the emergence of more differentiated cell types. This ultimately leads to an expansion of the NSC pool. Our results have implications for the development of therapeutic strategies for brain repair and suggest that LIF may be useful, in combination with other factors, in promoting regeneration in the adult brain.
Key words: IL-6; CNTF; adult neurogenesis; stem cell niche; brain repair; IdU; CldU
Received July 18, 2006;
revised Oct. 15, 2006;
accepted Oct. 17, 2006.
Correspondence should be addressed to Paul H. Patterson, Biology Division, 216-76, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125. Email: php{at}caltech.edu
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