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2016 ; 5
(ä): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Zeb1 controls neuron differentiation and germinal zone exit by a
mesenchymal-epithelial-like transition
#MMPMID27178982
Singh S
; Howell D
; Trivedi N
; Kessler K
; Ong T
; Rosmaninho P
; Raposo AA
; Robinson G
; Roussel MF
; Castro DS
; Solecki DJ
Elife
2016[May]; 5
(ä): ä PMID27178982
show ga
In the developing mammalian brain, differentiating neurons mature morphologically
via neuronal polarity programs. Despite discovery of polarity pathways acting
concurrently with differentiation, it's unclear how neurons traverse complex
polarity transitions or how neuronal progenitors delay polarization during
development. We report that zinc finger and homeobox transcription factor-1
(Zeb1), a master regulator of epithelial polarity, controls neuronal
differentiation by transcriptionally repressing polarity genes in neuronal
progenitors. Necessity-sufficiency testing and functional target screening in
cerebellar granule neuron progenitors (GNPs) reveal that Zeb1 inhibits
polarization and retains progenitors in their germinal zone (GZ). Zeb1 expression
is elevated in the Sonic Hedgehog (SHH) medulloblastoma subgroup originating from
GNPs with persistent SHH activation. Restored polarity signaling promotes
differentiation and rescues GZ exit, suggesting a model for future
differentiative therapies. These results reveal unexpected parallels between
neuronal differentiation and mesenchymal-to-epithelial transition and suggest
that active polarity inhibition contributes to altered GZ exit in pediatric brain
cancers.