Trafficking from the bone marrow to the thymus: a prerequisite for thymopoiesis
Article first published online: 31 JAN 2006
Volume 209, Issue 1, pages 47–57, February 2006
How to Cite
Schwarz, B. A. and Bhandoola, A. (2006), Trafficking from the bone marrow to the thymus: a prerequisite for thymopoiesis. Immunological Reviews, 209: 47–57. doi: 10.1111/j.0105-2896.2006.00350.x
- Issue published online: 31 JAN 2006
- Article first published online: 31 JAN 2006
Summary: T-cell development in the thymus requires periodic importation of hematopoietic progenitors from the bone marrow. Such thymus settling progenitors arise from hematopoietic stem cells (HSCs) that are retained in a specific bone marrow microenvironmental niche. Vacation of this niche is required for HSC proliferation and differentiation into downstream progenitors. In order to reach the thymus, progenitors must then be mobilized from bone marrow to blood. Finally, progenitors in blood must settle in the thymus. Here we review signals and molecular interactions that are likely to play a role in trafficking from the bone marrow to the thymus, focusing on how these interactions may regulate which progenitors physiologically contribute to thymopoiesis.