Key epigenetic and signaling factors in the formation and maintenance of the blood-brain barrier

To identify CNS endothelial cell (EC) the gene cohorts that participate in blood brain barrier (BBB) formation versus maintenance. We investigated the mechanism behind the reduced Wnt/ß-catenin signaling observed in during later development We also investigated whether the adult endothelial cells can re express the EC gene cohorts required for the BBB formation. Overall design: Ultra low mRNA sequencing of FACS sorted CD31+ve cortical ECs from E-17.5 W.T and HDAC2 ECKO. To conditionally KO HDAC2 E-17.5 endothelial cells we used tamoxifen-inducible Cdh5(PAC)-CreERT2 mice. HDAC2 flox/flox: mother was crossed with HDAC2flox/flox:Cdh5(PAC)-CreERT2 male. Tamoxifen was injected into the mother starting at E-12.5 and on alternate days until E-16.5. E-17.5 brain was harvested and cortex was isolated for Cd31+ve FACS sorting.