Paper Chase is a research database designed to offer abstracts of research articles published in journals that have a highly rated impact factor as determined by ISI Impact Factor and PageRank. Abstracts are organized by date, with the most recently published papers listed first. 

Paper Chase

Deconstructing the complexity of a microenvironmental niche.

Cell. Mar 30, 2012;149(1):16-7.
Krause DS, Scadden DT.

Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA.

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.