e martë, mars 15, 2005

Finding the Hematopoietic Stem Cell Niche in the Placenta

The origin of definitive hematopoiesis poses a fundamental biological question. In this issue of Developmental Cell, two groups have independently found a novel hematopoietic stem cell (HSC) niche in the extraembryonic placenta, in addition to previously identified alternative locations of hematopoiesis at different developmental stages.