Wnt/beta-catenin signaling controls development of the blood-brain barrier.

Wnt/beta-catenin signaling controls development of the blood-brain barrier.
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Wnt/β-catenin信号传导控制血脑屏障的发展。

DOI:
10.1083/jcb.200806024
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发表时间:
2008-11-03
影响因子:
7.8
通讯作者:
Dejana, Elisabetta
Dejana, Elisabetta
中科院分区:
生物学1区
文献类型:
--
作者:
Liebner, Stefan;Corada, Monica;Bangsow, Thorsten;Babbage, Jane;Taddei, Andrea;Czupalla, Cathrin J.;Reis, Marco;Felici, Angelina;Wolburg, Hartwig;Fruttiger, Marcus;Taketo, Makoto M.;von Melchner, Harald;Plate, Karl Heinz;Gerhardt, Holger;Dejana, Elisabetta

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血脑屏障(BBB)局限于脑毛细血管的内皮细胞,是流体稳态和神经功能不可或缺的。在这项研究中,我们表明,内皮Wnt/β-catenin(β-cat)信号调节胚胎和出生后发育过程中BBB特征的诱导和维持。β-cat在体内的内皮特异性稳定增强屏障成熟,而β-cat的失活导致紧密连接蛋白3(Cldn 3)的显著下调、质膜囊泡相关蛋白的上调和BBB破坏。通过N端截短或Wnt 3a处理在体外稳定原代脑内皮细胞(EC)中的β-cat增加Cldn 3表达、BBB型紧密连接形成和BBB特征性基因签名。β-cat的缺失或其信号传导的抑制消除了这种效应。此外,β-cat的稳定化也增加了非脑源性EC中的Cldn 3和屏障特性。这些发现可能开辟新的治疗途径,以调节内皮屏障功能,并限制BBB破坏的破坏性影响。
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.
DOI: 10.1083/jcb.200302070
发表时间: 2003-05-12
影响因子: 7.8
作者:
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通讯作者: Tsukita, S
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发表时间: 2005-11-01
影响因子: 11.5
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