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Age-dependent modulation of vascular niches for haematopoietic stem cells

Open access
Kusumbe, Anjali P., Ramasamy, Saravana K., Itkin, Tomer, Mäe, Maarja Andaloussi, Langen, Urs H., Betsholtz, Christer, Lapidot, Tsvee, Adams, Ralf H.·2016·Nature

Abstract

Blood vessels define local microenvironments in the skeletal system, play crucial roles in osteogenesis and provide niches for haematopoietic stem cells. The properties of niche-forming vessels and their changes in the ageing organism remain incompletely understood. Here we show that Notch signalling in endothelial cells leads to the expansion of haematopoietic stem cell niches in bone, which involves increases in CD31-positive capillaries and platelet-derived growth factor receptor-β (PDGFRβ)-positive perivascular cells, arteriole formation and elevated levels of cellular stem cell factor. Although endothelial hypoxia-inducible factor signalling promotes some of these changes, it fails to enhance vascular niche function because of a lack of arterialization and expansion of PDGFRβ-positive cells. In ageing mice, niche-forming vessels in the skeletal system are strongly reduced but can be restored by activation of endothelial Notch signalling. These findings indicate that vascular niches for haematopoietic stem cells are part of complex, age-dependent microenvironments involving multiple cell populations and vessel subtypes.

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Metadata

Authors
Kusumbe, A. P., Ramasamy, S. K., Itkin, T., Mäe, M. A., Langen, U. H., Betsholtz, C., Lapidot, T., & Adams, R. H.
Venue
Nature
Published
2016-04-13
Volume
532
Issue
7599
Pages
380-384
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2337668972
Cited by
464
References
5
FWCI
37.92
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Age-dependent modulation of vascular niches for haematopoietic stem cells. https://app.cochat.ai/papers/10.1038/nature17638
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Kusumbe, A. P., Ramasamy, S. K., Itkin, T., Mäe, M. A., Langen, U. H., Betsholtz, C., Lapidot, T., & Adams, R. H. (2016). Age-dependent modulation of vascular niches for haematopoietic stem cells. Nature. https://doi.org/10.1038/nature17638

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