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Abstract
Endothelial cells in the brain interact with other cell types, forming the blood-brain barrier. This barrier controls the movement of solutes into and out of the brain, regulating pathophysiological processes and drug delivery to the brain. Common isolation methods used to study these cells during embryonic development involve enzymatic treatment and cell sorting using specific markers. This process modifies the cell state and produces minute amounts of sample. Here, we describe a protocol for the enrichment of vascular cells from embryonic brains based on dextran separation. In this method, the brain is lightly disrupted with a pestle and then resuspended in a dextran solution. Low-speed centrifugation permits the separation of the parenchymal and vascular fractions. Further centrifugation steps improve fractionation. This method is simple and fast and produces enough sample for biochemical assays. Graphic abstract: Purification of vascular fragments from an embryonic brain.
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