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Hirschsprung Disease Is Linked to Defects in Neural Crest Stem Cell Function
Toshihide Iwashita,*Genevieve M. Kruger,*Ricardo Pardal,Mark J. Kiel,Sean J. Morrison
Genes associated with Hirschsprung disease, a failure to formenteric ganglia in the hindgut, were highly up-regulated ingut neural crest stem cells relative to whole-fetus RNA. Oneof these genes, the glial cell linederived neurotrophicfactor (GDNF) receptor Ret, was necessary for neural crest stemcell migration in the gut. GDNF promoted the migration of neuralcrest stem cells in culture but did not affect their survivalor proliferation. Gene expression profiling, combined with reversegenetics and analyses of stem cell function, suggests that Hirschsprungdisease is caused by defects in neural crest stem cell function.
Howard Hughes Medical Institute and Departments of Internal Medicine and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 481090934, USA.
* These authors contributed equally to this work.
To whom correspondence should be addressed. E-mail: seanjm{at}umich.edu
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