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10.1186/s13024-016-0138-8 http://scihub22266oqcxt.onion/10.1186/s13024-016-0138-8 C5146863!5146863 !27931262     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27931262 &cmd=llinks): Failed to open stream: HTTP request failed! 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Glymphatic distribution of CSF-derived apoE into brain is isoform specific and suppressed during sleep deprivation |pdf=|usr=}}{{27931262 }} gab.com Text Glymphatic distribution of CSF-derived apoE into brain is isoform specific and suppressed during sleep deprivation JO: Mol Neurodegener http://www.kidney.de/pget.php?&tw=1&pmid=27931262 #FOAvip BACKGROUND: Apolipoprotein E (apoE) is a major carrier of cholesterol and essential for synaptic plasticity. In brain, it's expressed by many cells but highly expressed by the choroid plexus and the predominant apolipoprotein in cerebrospinal fluid (CSF). The role of apoE in the CSF is unclear. Recently, the glymphatic system was described as a clearance system whereby CSF and ISF (interstitial fluid) is exchanged via the peri-arterial space and convective flow of ISF clearance is mediated by aquaporin 4 (AQP4), a water channel. We reasoned that this system also serves to distribute essential molecules in CSF into brain. The aim was to establish whether apoE in CSF, secreted by the choroid plexus, is distributed into brain, and whether this distribution pattern was altered by sleep deprivation. METHODS: We used fluorescently labeled lipidated apoE isoforms, lenti-apoE3 delivered to the choroid plexus, immunohistochemistry to map apoE brain distribution, immunolabeled cells and proteins in brain, Western blot analysis and ELISA to determine apoE levels and radiolabeled molecules to quantify CSF inflow into brain and brain clearance in mice. Data were statistically analyzed using ANOVA or Student's t- test. RESULTS: We show that the glymphatic fluid transporting system contributes to the delivery of choroid plexus/CSF-derived human apoE to neurons. CSF-delivered human apoE entered brain via the perivascular space of penetrating arteries and flows radially around arteries, but not veins, in an isoform specific manner (apoE2?>?apoE3?>?apoE4). Flow of apoE around arteries was facilitated by AQP4, a characteristic feature of the glymphatic system. ApoE3, delivered by lentivirus to the choroid plexus and ependymal layer but not to the parenchymal cells, was present in the CSF, penetrating arteries and neurons. The inflow of CSF, which contains apoE, into brain and its clearance from the interstitium were severely suppressed by sleep deprivation compared to the sleep state. CONCLUSIONS: Thus, choroid plexus/CSF provides an additional source of apoE and the glymphatic fluid transporting system delivers it to brain via the periarterial space. By implication, failure in this essential physiological role of the glymphatic fluid flow and ISF clearance may also contribute to apoE isoform-specific disorders in the long term. Twit Text FOAVip Glymphatic distribution of CSF-derived apoE into brain is isoform specific and suppressed during sleep deprivation ????Mol Neurodegener http://www.kidney.de/pget.php?&tw=1&pmid=27931262 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=27931262 #FOAvip English Wikipedia <ref>{{Cite pmid|27931262 }}</ref> Glymphatic distribution of CSF-derived apoE into brain is isoform specific and suppressed during sleep deprivation #MMPMID27931262 Achariyar TM ; Li B ; Peng W ; Verghese PB ; Shi Y ; McConnell E ; Benraiss A ; Kasper T ; Song W ; Takano T ; Holtzman DM ; Nedergaard M ; Deane R Mol Neurodegener 2016[Dec]; 11 (1 ): 74 PMID27931262 show ga BACKGROUND: Apolipoprotein E (apoE) is a major carrier of cholesterol and essential for synaptic plasticity. In brain, it's expressed by many cells but highly expressed by the choroid plexus and the predominant apolipoprotein in cerebrospinal fluid (CSF). The role of apoE in the CSF is unclear. Recently, the glymphatic system was described as a clearance system whereby CSF and ISF (interstitial fluid) is exchanged via the peri-arterial space and convective flow of ISF clearance is mediated by aquaporin 4 (AQP4), a water channel. We reasoned that this system also serves to distribute essential molecules in CSF into brain. The aim was to establish whether apoE in CSF, secreted by the choroid plexus, is distributed into brain, and whether this distribution pattern was altered by sleep deprivation. METHODS: We used fluorescently labeled lipidated apoE isoforms, lenti-apoE3 delivered to the choroid plexus, immunohistochemistry to map apoE brain distribution, immunolabeled cells and proteins in brain, Western blot analysis and ELISA to determine apoE levels and radiolabeled molecules to quantify CSF inflow into brain and brain clearance in mice. Data were statistically analyzed using ANOVA or Student's t- test. RESULTS: We show that the glymphatic fluid transporting system contributes to the delivery of choroid plexus/CSF-derived human apoE to neurons. CSF-delivered human apoE entered brain via the perivascular space of penetrating arteries and flows radially around arteries, but not veins, in an isoform specific manner (apoE2?>?apoE3?>?apoE4). Flow of apoE around arteries was facilitated by AQP4, a characteristic feature of the glymphatic system. ApoE3, delivered by lentivirus to the choroid plexus and ependymal layer but not to the parenchymal cells, was present in the CSF, penetrating arteries and neurons. The inflow of CSF, which contains apoE, into brain and its clearance from the interstitium were severely suppressed by sleep deprivation compared to the sleep state. CONCLUSIONS: Thus, choroid plexus/CSF provides an additional source of apoE and the glymphatic fluid transporting system delivers it to brain via the periarterial space. By implication, failure in this essential physiological role of the glymphatic fluid flow and ISF clearance may also contribute to apoE isoform-specific disorders in the long term. |Alzheimer Disease/*metabolism [MESH] |Animals [MESH] |Apolipoproteins E/cerebrospinal fluid/*metabolism [MESH] |Aquaporin 4/metabolism [MESH] |Biological Transport [MESH] |Brain/*metabolism [MESH] |Male [MESH] |Mice [MESH] |Neurons/*metabolism [MESH] |Protein Isoforms/metabolism [MESH] |Sleep Deprivation/cerebrospinal fluid/*metabolism [MESH]Glymphatic distribution of CSF-derived apoE into brain is isoform spec(epmc).pdf DeepDyve Pubget Overpricing