The stem cell niche: theme and variations.
Stem cells in animal tissues are often located and controlled by special tissue microenvironments known as niches. Studies of stem cell niches in model systems such as Drosophila have revealed adhesive interactions, cell cycle modifications and intercellular signals that operate to control stem cell behavior. Candidate niches and regulatory molecules have also been identified in many mammalian tissues, including bone marrow, skin, gut and brain. While niches are an ancient evolutionary device with conserved features across diverse organisms, we suggest that certain niches display important differences in their organization and function.
Ohlstein
Benjamin
B
Howard Hughes Medical Institute, Carnegie Institution of Washington, Department of Embryology, 115 W. University Pkwy., Baltimore, Maryland 21210, USA.
Kai
Toshie
T
Decotto
Eva
E
Spradling
Allan
A
D000818:Animals; D002448:Cell Adhesion; D002455:Cell Division; D019070:Cell Lineage; D049109:Cell Proliferation; D004330:Drosophila; D006801:Humans; D023421:Models, Animal; D008954:Models, Biological; D015398:Signal Transduction; D013234:Stem Cells / Q000166:cytology*; D014018:Tissue Distribution