title: Signal processing underlying extrinsic control of stem cell fate.
abstract: OBJECTIVE
  Strategies to manipulate stem cells for therapeutic applications are limited by our inability to control or predict stem cell fate decisions in response to exogenous stimuli. This review focuses on the mechanisms by which exogenous stimuli influence cell fate.
  
  
  RESULTS
  Limitations in our ability to control cell fate arises from our primarily qualitative understanding of stem cell regulation, which proposes straightforward cue-fate relationships that appear to be the exception rather than the rule. Alternatively, consideration of the underlying quantitative, temporal, and spatial mechanisms governing extrinsic regulation of stem cell fate may enable novel approaches to control stem cell output predictively.
  
  
  CONCLUSIONS
  The authors review advances in the understanding of these underlying mechanisms, and discuss experimental and analytic tools necessary to investigate and use these mechanisms to control stem cell fate.
authors.affiliation: Institute of Biomaterials and Biomedical Engineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Ontario, Canada.
authors.forename: Ryan E
authors.initials: RE
authors.lastname: Davey
authors.forename: Peter W
authors.initials: PW
authors.lastname: Zandstra
mesh_terms: D000818:Animals; D002465:Cell Movement; D006801:Humans; D015398:Signal Transduction; D013234:Stem Cells / Q000166:cytology / Q000502:physiology*