Abstract:
:During organogenesis, PAX6 is required for establishment of various progenitor subtypes within the central nervous system, eye and pancreas. PAX6 expression is maintained in a variety of cell types within each organ, although its role in each lineage and how it acquires cell-specific activity remain elusive. Herein, we aimed to determine the roles and the hierarchical organization of the PAX6-dependent gene regulatory network during the differentiation of the retinal pigmented epithelium (RPE). Somatic mutagenesis of Pax6 in the differentiating RPE revealed that PAX6 functions in a feed-forward regulatory loop with MITF during onset of melanogenesis. PAX6 both controls the expression of an RPE isoform of Mitf and synergizes with MITF to activate expression of genes involved in pigment biogenesis. This study exemplifies how one kernel gene pivotal in organ formation accomplishes a lineage-specific role during terminal differentiation of a single lineage.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Raviv S,Bharti K,Rencus-Lazar S,Cohen-Tayar Y,Schyr R,Evantal N,Meshorer E,Zilberberg A,Idelson M,Reubinoff B,Grebe R,Rosin-Arbesfeld R,Lauderdale J,Lutty G,Arnheiter H,Ashery-Padan Rdoi
10.1371/journal.pgen.1004360subject
Has Abstractpub_date
2014-05-29 00:00:00pages
e1004360issue
5eissn
1553-7390issn
1553-7404pii
PGENETICS-D-13-01762journal_volume
10pub_type
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