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• W1985511908 startingPage "1457" @default.
• W1985511908 abstract "Astrocytes, the most prominent glial cell type in the brain, send specialized processes named endfeet, which enwrap blood vessels and express a large molecular repertoire dedicated to the physiology of the vascular system. One of the most striking properties of astrocyte endfeet is their enrichment in gap junction protein connexins 43 and 30 (Cx43 and Cx30) allowing for direct intercellular trafficking of ions and small signaling molecules through perivascular astroglial networks. The contribution of astroglial connexins to the physiology of the brain vascular system has never been addressed. Here, we show that Cx43 and Cx30 expression at the level of perivascular endfeet starts from postnatal days 2 and 12 and is fully mature at postnatal days 15 and 20, respectively, indicating that astroglial perivascular connectivity occurs and develops during postnatal blood–brain barrier (BBB) maturation. We demonstrate that mice lacking Cx30 and Cx43 in GFAP (glial fibrillary acidic protein)-positive cells display astrocyte endfeet edema and a partial loss of the astroglial water channel aquaporin-4 and β-dystroglycan, a transmembrane receptor anchoring astrocyte endfeet to the perivascular basal lamina. Furthermore, the absence of astroglial connexins weakens the BBB, which opens upon increased hydrostatic vascular pressure and shear stress. These results demonstrate that astroglial connexins are necessary to maintain BBB integrity." @default.
• W1985511908 created "2016-06-24" @default.
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• W1985511908 date "2012-04-04" @default.
• W1985511908 modified "2023-09-30" @default.
• W1985511908 title "Deletion of Astroglial Connexins Weakens the Blood–Brain Barrier" @default.
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• W1985511908 doi "https://doi.org/10.1038/jcbfm.2012.45" @default.
• W1985511908 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3421093" @default.
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• W1985511908 hasPublicationYear "2012" @default.
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