A genome-wide screen for spatially restricted expression patterns identifies transcription factors that regulate glial development.
Forward genetic screens in genetically accessible invertebrate organisms such as Drosophila melanogaster have shed light on transcription factors that specify formation of neurons in the vertebrate CNS. However, invertebrate models have, to date, been uninformative with respect to genes that specify formation of the vertebrate glial lineages. All recent insights into specification of vertebrate glia have come via monitoring the spatial and temporal expression patterns of individual transcription factors during development. In studies described here, we have taken this approach to the genome scale with an in silico screen of the Mahoney pictorial atlas of transcription factor expression in the developing CNS. From the population of 1445 known or probable transcription factors encoded in the mouse genome, we identify 12 novel transcription factors that are expressed in glial lineage progenitor cells. Entry-level screens for biological function establish one of these transcription factors, Klf15, as sufficient for genesis of precocious GFAP-positive astrocytes in spinal cord explants. Another transcription factor, Tcf4, plays an important role in maturation of oligodendrocyte progenitors.
Fu
Hui
H
Department of Cancer Biology, Dana-Farber Cancer Institute, and Departments of Neurobiology and Microbiology and Molecular Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA.
Cai
Jun
J
Clevers
Hans
H
Fast
Eva
E
Gray
Susan
S
Greenberg
Rachel
R
Jain
Mukesh K
MK
Ma
Qiufu
Q
Qiu
Mengsheng
M
Rowitch
David H
DH
Taylor
Christopher M
CM
Stiles
Charles D
CD
D000818:Animals; D000831:Animals, Newborn; D002454:Cell Differentiation / Q000235:genetics*; D002478:Cells, Cultured; D005260:Female; D020869:Gene Expression Profiling; D018507:Gene Expression Regulation, Developmental / Q000502:physiology; D005820:Genetic Testing / Q000379:methods; D016678:Genome / Q000502:physiology*; D051379:Mice; D018345:Mice, Knockout; D009457:Neuroglia / Q000166:cytology / Q000502:physiology*; D011247:Pregnancy; D013234:Stem Cells / Q000166:cytology / Q000502:physiology*; D014157:Transcription Factors / Q000235:genetics / Q000502:physiology*
D014157:Transcription Factors