TY - JOUR
T1 - Mesenchymal and haematopoietic stem cells form a unique bone marrow niche
AU - Méndez-Ferrer, Simón
AU - Michurina, Tatyana V.
AU - Ferraro, Francesca
AU - Mazloom, Amin R.
AU - MacArthur, Ben D.
AU - Lira, Sergio A.
AU - Scadden, David T.
AU - Ma'ayan, Avi
AU - Enikolopov, Grigori N.
AU - Frenette, Paul S.
N1 - Funding Information:
Acknowledgements We thank M. García-Fernández, Y. Kunisaki, C. Scheiermann, J. Isern, E. Nistal-Villan and D. Lucas for help with some experiments; M. Kiel and S. Morrison for advice about immunohistological analysis of HSCs; C. Lin for help with intravital microscopy imaging; G. Fishell for the gift of Nes-creERT2 and RCE:loxP transgenic mice; J. Ahmed, W. Kao and J. Godbold for help with immunofluorescence and statistical analyses; S. Lymperi for advice about LT-CIC; L. Silberstein, G. Khitrov and W. Zhang for help with microarray experiments; M. Grisotto for help with cell sorting; and L. Shang, A. J. Peired and C. Prophete for help with animals. This work was supported by the National Institutes of Health (R01 grants DK056638, HL69438, HL097819) and the Department of Defence (Idea Development Award PC060271) to P.S.F. and by the National Institute of Mental Health and Ira Hazan Fund to G.N.E. S.M.-F. is the recipient of a Scholar Award by the American Society of Hematology. P.S.F. is an Established Investigator of the American Heart Association.
PY - 2010/8/12
Y1 - 2010/8/12
N2 - The cellular constituents forming the haematopoietic stem cell (HSC) niche in the bone marrow are unclear, with studies implicating osteoblasts, endothelial and perivascular cells. Here we demonstrate that mesenchymal stem cells (MSCs), identified using nestin expression, constitute an essential HSC niche component. Nestin + MSCs contain all the bone-marrow colony-forming-unit fibroblastic activity and can be propagated as non-adherent mesenspheres-that can self-renew and expand in serial transplantations. Nestin + MSCs are spatially associated with HSCs and adrenergic nerve fibres, and highly express HSC maintenance genes. These genes, and others triggering osteoblastic differentiation, are selectively downregulated during enforced HSC mobilization or γ 23 adrenoreceptor activation. Whereas parathormone administration doubles the number of bone marrow nestin + cells and favours their osteoblastic differentiation, in vivo nestin + cell depletion rapidly reduces HSC content in the bone marrow. Purified HSCs home near nestin + MSCs in the bone marrow of lethally irradiated mice, whereas in vivo nestin + cell depletion significantly reduces bone marrow homing of haematopoietic progenitors. These results uncover an unprecedented partnership between two distinct somatic stem-cell types and are indicative of a unique niche in the bone marrow made of heterotypic stem-cell pairs.
AB - The cellular constituents forming the haematopoietic stem cell (HSC) niche in the bone marrow are unclear, with studies implicating osteoblasts, endothelial and perivascular cells. Here we demonstrate that mesenchymal stem cells (MSCs), identified using nestin expression, constitute an essential HSC niche component. Nestin + MSCs contain all the bone-marrow colony-forming-unit fibroblastic activity and can be propagated as non-adherent mesenspheres-that can self-renew and expand in serial transplantations. Nestin + MSCs are spatially associated with HSCs and adrenergic nerve fibres, and highly express HSC maintenance genes. These genes, and others triggering osteoblastic differentiation, are selectively downregulated during enforced HSC mobilization or γ 23 adrenoreceptor activation. Whereas parathormone administration doubles the number of bone marrow nestin + cells and favours their osteoblastic differentiation, in vivo nestin + cell depletion rapidly reduces HSC content in the bone marrow. Purified HSCs home near nestin + MSCs in the bone marrow of lethally irradiated mice, whereas in vivo nestin + cell depletion significantly reduces bone marrow homing of haematopoietic progenitors. These results uncover an unprecedented partnership between two distinct somatic stem-cell types and are indicative of a unique niche in the bone marrow made of heterotypic stem-cell pairs.
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U2 - 10.1038/nature09262
DO - 10.1038/nature09262
M3 - Article
C2 - 20703299
AN - SCOPUS:77955646193
SN - 0028-0836
VL - 466
SP - 829
EP - 834
JO - Nature
JF - Nature
IS - 7308
ER -