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Amyloid-? efflux from the central nervous system into the plasma.


ABSTRACT: The aim of this study was to measure the flux of amyloid-? (A?) across the human cerebral capillary bed to determine whether transport into the blood is a significant mechanism of clearance for A? produced in the central nervous system (CNS).Time-matched blood samples were simultaneously collected from a cerebral vein (including the sigmoid sinus, inferior petrosal sinus, and the internal jugular vein), femoral vein, and radial artery of patients undergoing inferior petrosal sinus sampling. For each plasma sample, A? concentration was assessed by 3 assays, and the venous to arterial A? concentration ratios were determined.A? concentration was increased by ?7.5% in venous blood leaving the CNS capillary bed compared to arterial blood, indicating efflux from the CNS into the peripheral blood (p?

SUBMITTER: Roberts KF 

PROVIDER: S-EPMC4355962 | biostudies-other | 2014 Dec

REPOSITORIES: biostudies-other

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<h4>Objective</h4>The aim of this study was to measure the flux of amyloid-β (Aβ) across the human cerebral capillary bed to determine whether transport into the blood is a significant mechanism of clearance for Aβ produced in the central nervous system (CNS).<h4>Methods</h4>Time-matched blood samples were simultaneously collected from a cerebral vein (including the sigmoid sinus, inferior petrosal sinus, and the internal jugular vein), femoral vein, and radial artery of patients undergoing infe  ...[more]

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