Dehydroepiandrosterone sulfate augments blood-brain barrier and tight junction protein expression in brain endothelial cells.

Dehydroepiandrosterone sulfate augments blood-brain barrier and tight junction protein expression in brain endothelial cells.
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硫酸脱氢表雄酮增强血脑屏障和脑内皮细胞紧密连接蛋白的表达

DOI:
10.1016/j.bbamcr.2017.05.006
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发表时间:
2017
期刊:
Biochimica et biophysica acta. Molecular cell research
影响因子:
--
通讯作者:
Scheiner-Bobis G
Scheiner-Bobis G
中科院分区:
--
文献类型:
--
作者:
Papadopoulos D;Scheiner-Bobis G

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脑内皮细胞之间的紧密连接(TJ)对血脑屏障(BBB)的形成和维持至关重要。虽然BBB完整性的丧失与几种神经病理学疾病有关,但增加或稳定BBB的治疗方法很少。在这里,我们表明,生理浓度的硫酸脱氢表雄酮(DHEAS)刺激TJ蛋白的表达zonula occludens-1(ZO-1)和claudin-3在脑源性内皮细胞系bEnd.3和促进TJ形成相邻细胞之间,表现为跨细胞单层的跨内皮阻力增强。通过siRNA沉默雄激素受体表达不能阻止DHEAS诱导的ZO-1表达刺激,表明DHEAS转化为睾酮不是其作用所必需的。通过siRNA抑制Gnα11表达可阻止DHEAS作用,这表明G蛋白偶联受体是DHEAS作用的介质。这些结果与DHEAS本身作为一种激素支持BBB完整性的观点一致。目前的研究结果可能有助于开发新的策略,用于预防或治疗与BBB缺陷相关的神经系统疾病。
Tight junctions (TJ) between brain endothelial cells are essential for formation and maintenance of the blood-brain barrier (BBB). Although loss of BBB integrity is associated with several neuropathological disorders, treatments that augment or stabilise the BBB are scarce. Here we show that physiological concentrations of dehydroepiandrosterone sulfate (DHEAS) stimulate the expression of the TJ proteins zonula occludens-1 (ZO-1) and claudin-3 in the brain-derived endothelial cell line bEnd.3 and promote TJ formation between neighbouring cells, demonstrated by augmented transendothelial resistance across cell monolayers. Silencing androgen receptor expression by siRNA does not prevent DHEAS-induced stimulation of ZO-1 expression, indicating that conversion of DHEAS into testosterone is not required for its actions. Suppression of Gnα11 expression by siRNA prevents DHEAS actions, pointing towards a G-protein-coupled receptor as being a mediator of the DHEAS effects. These results are consistent with the idea that DHEAS, acting as a hormone in its own right, supports the integrity of the BBB. The current findings might help in developing new strategies for the prevention or treatment of neurological disorders associated with BBB defects.
老年男性和女性硫酸脱氢表雄酮 (DHEAS) 变化的纵向研究:兰乔贝尔纳多研究。
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