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Nature 425, 778-779 (23 October 2003) | doi:10.1038/425778a

Stem cells: Interactive niches

Ihor R. Lemischka1 & Kateri A. Moore1

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The microenvironment, or niche, in which stem cells reside controls their renewal and maturation. The niche that regulates blood-forming stem cells in adult animals has eluded researchers — until now.

Cell-fate decisions in the developing embryo are governed by a complex interplay between cell-autonomous signals and stimuli from the surrounding tissue — the microenvironment. Similar processes control the birth and maturation of stem cells that replenish mature cell populations in adults1, 2.

  1. Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA.

Correspondence to: Ihor R. Lemischka1 Email: ilemischka@molbio.princeton.edu