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Background In Alzheimer’s disease, there are striking changes in CSF composition that relate to altered choroid plexus (CP) function. Studying CP tissue gene expression at the blood–cerebrospinal fluid barrier could provide further insight into the epithelial and stromal responses to neurodegenerative disease states. Methods Transcriptome-wide Affymetrix microarrays were used to determine disease-related changes in gene expression in human CP. RNA from post-mortem samples of the entire lateral ventricular choroid plexus was extracted from 6 healthy controls (Ctrl), 7 patients with advanced (Braak and Braak stage III–VI) Alzheimer’s disease (AD), 4 with frontotemporal dementia (FTD) and 3 with Huntington’s disease (HuD). Statistics and agglomerative clustering were accomplished with MathWorks, MatLab; and gene set annotations by comparing input sets to GeneGo (http://www.genego.com) and Ingenuity (http://www.ingenuity.com) pathway sets. Bonferroni-corrected hypergeometric p-values of

Alterations in choroid plexus gene expression in Alzheimer’s disease provide inferences for CSF composition and dynamics Miles C Miller, Edward G Stopa, Elena V Nikonova, Keith Q Tanis, Alexei A Podtelezhnikov, Eva M Finney, David J Stone, Luiz M Camargo, Lisan Parker, Ajay Verma, Andrew Baird, John E Donahue, Ana Maria Gonzalez, Brian Eliceiri, Gerald D Silverberg, Petra M Klinge, Conrad E Johanson