Wnt/β-catenin signaling controls development of the blood–brain barrier
Abstract
The blood–brain barrier (BBB) is confined to the endothelium of brain capillaries and is indispensable for fluid homeostasis and neuronal function. In this study, we show that endothelial Wnt/β-catenin (β-cat) signaling regulates induction and maintenance of BBB characteristics during embryonic and postnatal development. Endothelial specific stabilization of β-cat in vivo enhances barrier maturation, whereas inactivation of β-cat causes significant down-regulation of claudin3 (Cldn3), up-regulation of plamalemma vesicle-associated protein, and BBB breakdown. Stabilization of β-cat in primary brain endothelial cells (ECs) in vitro by N-terminal truncation or Wnt3a treatment increases Cldn3 expression, BBB-type tight junction formation, and a BBB characteristic gene signature. Loss of β-cat or inhibition of its signaling abrogates this effect. Furthermore, stabilization of β-cat also increased Cldn3 and barrier properties in nonbrain-derived ECs. These findings may open new therapeutic avenues to modulate endothelial barrier function and to limit the devastating effects of BBB breakdown.
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During embryogenesis, neural progenitors secrete Wnt ligands, which activate canonical Wnt signaling in ECs and contribute to maturation of brain vasculature.
“During embryogenesis, neural progenitors secrete Wnt ligands, which activate canonical Wnt signaling in ECs and contribute to the maturation of brain vasculature6,7,8.”
From Neurons secrete miR-132-containing exosomes to regulate brain vascular integrity (2017) · cites this paper as [8]
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- Authors
- Liebner, S., Corada, M., Bangsow, T., Babbage, J., Taddei, A., Czupalla, C. J., Reis, M., Felici, A., Wolburg, H., Fruttiger, M., Taketo, M. M., von Melchner, H., Plate, K. H., Gerhardt, H., & Dejana, E.
- Venue
- The Journal of Cell Biology
- Publisher
- Rockefeller University Press
- Published
- 2008-10-27
- Volume
- 183
- Issue
- 3
- Pages
- 409-417
- ISSN
- 1540-8140
- 0021-9525
- PMC
- PMC2575783
- Cited by
- 793
- References
- 2
- Language
- en
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