首页> 外文期刊>American Journal of Physiology >Shuttling glucose across brain microvessels, with a little help from GLUT1 and AMP kinase. Focus on 'AMP kinase regulation of sugar transport in brain capillary endothelial cells during acute metabolic stress'
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Shuttling glucose across brain microvessels, with a little help from GLUT1 and AMP kinase. Focus on 'AMP kinase regulation of sugar transport in brain capillary endothelial cells during acute metabolic stress'

机译:在GLUT1和AMP激酶的帮助下,在大脑微血管中穿梭葡萄糖。专注于“ AMP激酶调节急性代谢应激期间脑毛细血管内皮细胞糖运输的过程”

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摘要

The blood-brain barrier (BBB) maintains the individuality of brain fluid, while allowing it to selectively import nutrients and process toxic products. Its major constituent is a single layer of continuous, nonfenestrated endothelium lining the microvessels, whose unique features account in large part for the integrity of the barrier. The endothelial cell monolayer is the major determinant, but other cells in the central nervous system (e.g., pericytes and astrocytes) contribute to the integrity of the BBB. The interendothelial tight junctions of the BBB are one of its signature elements that greatly restrict paracellular permeability to solutes, fluid, and transmigrating cells. This is markedly distinct from the leakier, discontinuous, and fenes-trated endothelium of liver microvessels (sinusoids). For example, the tight junctions of the cerebral endothelium (pial vessels) confer an electrical resistance (1,300 cm~2) far higher than other endothelia (6). Therefore, communication between blood and the brain interstitial fluid requires individually tailored molecular mechanisms.
机译:血脑屏障(BBB)保持了脑液的个性,同时使其可以选择性地输入营养物质并处理有毒产品。它的主要成分是微血管衬里的一层连续的,无孔眼的内皮细胞,其独特的特征在很大程度上说明了屏障的完整性。内皮细胞单层是主要决定因素,但中枢神经系统中的其他细胞(例如周细胞和星形胶质细胞)有助于血脑屏障的完整性。 BBB的内皮间紧密连接是其标志性元素之一,极大地限制了旁细胞对溶质,液体和迁移细胞的通透性。这与肝微血管(正弦曲线)的漏出,不连续和微调的内皮细胞明显不同。例如,脑内皮(血管)的紧密连接所产生的电阻(1300 cm〜2)远高于其他内皮(6)。因此,血液与大脑间质液之间的交流需要单独定制的分子机制。

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