Deconstructing the complexity of a microenvironmental niche.

Krause, Daniela S; Scadden, David T · Cell · 2012

basic_science · Level V

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Abstract

Cells acquire their fate in vivo in the context of a complex microenvironmental "niche" comprised of heterologous cell types, signaling molecules, extracellular matrix, biophysical forces, and metabolic substrates. Now Calderón and Boehm report the "refunctionalization" of a defective thymic epithelial niche, offering insights into how signaling molecules may be hierarchically organized to direct differentiation outcomes.