alphaE-catenin controls cerebral cortical size by regulating the hedgehog signaling pathway.
During development, cells monitor and adjust their rates of accumulation to produce organs of predetermined size. We show here that central nervous system-specific deletion of the essential adherens junction gene, alphaE-catenin, causes abnormal activation of the hedgehog pathway, resulting in shortening of the cell cycle, decreased apoptosis, and cortical hyperplasia. We propose that alphaE-catenin connects cell-density-dependent adherens junctions with the developmental hedgehog pathway and that this connection may provide a negative feedback loop controlling the size of developing cerebral cortex.
Lien
Wen-Hui
WH
Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.
Klezovitch
Olga
O
Fernandez
Tania E
TE
Delrow
Jeff
J
Vasioukhin
Valeri
V
D022005:Adherens Junctions / Q000502:physiology* / Q000648:ultrastructure; D000818:Animals; D017209:Apoptosis; D002448:Cell Adhesion; D002452:Cell Count; D002453:Cell Cycle; D002454:Cell Differentiation; D016764:Cell Polarity; D002490:Central Nervous System / Q000196:embryology; D002540:Cerebral Cortex / Q000166:cytology / Q000196:embryology* / Q000473:pathology / Q000502:physiology; D053823:Hedgehog Proteins; D006965:Hyperplasia; D051379:Mice; D008938:Mitosis; D008954:Models, Biological; D009154:Mutation; D009474:Neurons / Q000166:cytology / Q000502:physiology* / Q000648:ultrastructure; D020411:Oligonucleotide Array Sequence Analysis; D015398:Signal Transduction; D013234:Stem Cells / Q000166:cytology / Q000648:ultrastructure; D015534:Trans-Activators / Q000378:metabolism*; D015854:Up-Regulation; D051178:alpha Catenin / Q000235:genetics / Q000502:physiology*
D053823:Hedgehog Proteins; D015534:Trans-Activators; D051178:alpha Catenin