Journal of Neuroscience, Vol 14, 1433-1440, Copyright © 1994 by Society for Neuroscience
Stem cell factor is a neurotrophic factor for neural crest-derived chick sensory neurons
JF Carnahan, DR Patel and JA Miller
Amgen Center, Neurobiology Department, Thousand Oaks, California 91320.
We have found that stem cell factor (SCF) selectively enhances the survival
of cultured embryonic chick dorsal root ganglia (DRG) neurons. Neurons
grown in the presence of SCF expressed both neurofilament 150 kDa subunit
and calcitonin-gene related peptide. SCF does not, however, enhance the
survival of parasympathetic, placode-derived sensory or sympathetic neurons
in culture. Combining SCF with brain-derived neurotrophic factor or
neurotrophin-3, but not with NGF, maintains more neurons than either factor
alone, suggesting that these factors have partially overlapping activities.
SCF preferentially rescues small neurons from the DRG. Labeling studies
with bromodeoxyuridine indicate that the neurons sustained by SCF are not
differentiating from a dividing progenitor.