Abstract The transcription factor Gata3 is crucially involved in epidermis and hair follicle differentiation. Yet, little is known about how Gata3 co-ordinates stem cell lineage determination in skin, what pathways are involved and how Gata3 differentially regulates distinct cell populations within the hair follicle. Here, we describe a conditional Gata3-/- mouse (K14-Gata3-/-) in which Gata3 is specifically deleted in epidermis and hair follicles. K14-Gata3-/- mice show aberrant postnatal growth and development, delayed hair growth and maintenance, abnormal hair follicle organization and irregular pigmentation. After the first hair cycle, the germinative layer surrounding the dermal papilla was not restored; instead, proliferation was pronounced in basal epidermal cells. Transcriptome analysis of laser-dissected K14-Gata3-/- hair follicles revealed mitosis, epithelial differentiation and the Notch, Wnt and BMP signaling pathways to be significantly overrepresented. Elucidation of these pathways at the RNA and protein levels and physiologic endpoints suggests that Gata3 integrates diverse signaling networks to regulate the balance between hair follicle and epidermal cell fates.

Animals, Animals, Newborn, Bone Morphogenetic Proteins/metabolism, Cell Cycle, Cell Proliferation, Embryonic Development, Epidermis/growth & development/metabolism, Female, Fibroblast Growth Factors/metabolism, GATA3 Transcription Factor/deficiency/genetics/*metabolism, Hair Follicle/abnormalities/cytology/*growth & development/*metabolism, Hyperkeratosis, Epidermolytic/genetics/metabolism/pathology, Hyperplasia, Keratinocytes/cytology/metabolism, Keratins/metabolism, Mice, Mice, Knockout, Mice, Transgenic, Phenotype, Pregnancy, Receptor, Notch1/metabolism, Signal Transduction, Stem Cells/cytology/metabolism, Transcription, Genetic, Wnt Proteins/metabolism
dx.doi.org/10.1242/dev.02721, hdl.handle.net/1765/21006
Development (Cambridge)
Erasmus MC: University Medical Center Rotterdam

Kurek, D, Garinis, G.A, van Doorninck, J.H, van der Wees, J, & Grosveld, F.G. (2007). Transcriptome and phenotypic analysis reveals Gata3-dependent signalling pathways in murine hair follicles. Development (Cambridge), 134(2), 261–272. doi:10.1242/dev.02721