title: Are neural crest stem cells the missing link between hematopoietic and neurogenic niches?
abstract: Hematopoietic niches are defined as cellular and molecular microenvironments that regulate hematopoietic stem cell (HSC) function together with stem cell autonomous mechanisms. Many different cell types have been characterized as contributors to the formation of HSC niches, such as osteoblasts, endothelial cells, Schwann cells, and mesenchymal progenitors. These mesenchymal progenitors have themselves been classified as CXC chemokine ligand (CXCL) 12-abundant reticular (CAR) cells, stem cell factor expressing cells, or nestin-positive mesenchymal stem cells (MSCs), which have been recently identified as neural crest-derived cells (NCSCs). Together, these cells are spatially associated with HSCs and believed to provide appropriate microenvironments for HSC self-renewal, differentiation, mobilization and hibernation both by cell-cell contact and soluble factors. Interestingly, it appears that regulatory pathways governing the hematopoietic niche homeostasis are operating in the neurogenic niche as well. Therefore, this review paper aims to compare both the regulation of hematopoietic and neurogenic niches, in order to highlight the role of NCSCs and nervous system components in the development and the regulation of the hematopoietic system.
authors.affiliation: Groupe Interdisciplinaire de Génoprotéomique Appliquée-Neurosciences, Unit of Nervous System Disorders and Treatment, University of Liège Liège, Belgium.
authors.forename: Cécile
authors.initials: C
authors.lastname: Coste
authors.affiliation: Groupe Interdisciplinaire de Génoprotéomique Appliquée-Neurosciences, Unit of Nervous System Disorders and Treatment, University of Liège Liège, Belgium.
authors.forename: Virginie
authors.initials: V
authors.lastname: Neirinckx
authors.affiliation: Groupe Interdisciplinaire de Génoprotéomique Appliquée-Cardiovascular Sciences, University of Liège Liège, Belgium ; Hematology Department, University Hospital Liège, Belgium.
authors.forename: André
authors.initials: A
authors.lastname: Gothot
authors.affiliation: Groupe Interdisciplinaire de Génoprotéomique Appliquée-Neurosciences, Unit of Nervous System Disorders and Treatment, University of Liège Liège, Belgium.
authors.forename: Sabine
authors.initials: S
authors.lastname: Wislet
authors.affiliation: Groupe Interdisciplinaire de Génoprotéomique Appliquée-Neurosciences, Unit of Nervous System Disorders and Treatment, University of Liège Liège, Belgium ; Groupe Interdisciplinaire de Génoprotéomique Appliquée-Development, Stem Cells and Regenerative Medicine, University of Liège Liège, Belgium ; Neurology Department, University Hospital Liège, Belgium.
authors.forename: Bernard
authors.initials: B
authors.lastname: Rogister
keywords: hematopoietic stem cell; neural crest stem cell; neural stem cell; niche; signaling pathways