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Brain Barrier Integrity and Development in the Rat

periphery is not through incomplete barriers. The early expression                     Table S3 Junction specific genes. A dataset containing
of many transporter and channel genes known to be involved in                          junction transcripts from Illumina screen that were statistically
CSF secretion, coupled with published data on ionic gradients                          enriched in either the embryo (E15) or adult, as identified by GEO
between CSF and plasma also shows that a characteristic internal                       annotations.
environment is established early in brain development.                                 (XLSX)

   Detailed electrophysiological studies in embryonic choroid                          Table S4 Transporters and channel specific genes. A
plexus cells will be required to confirm which transporters and                        dataset containing transport and channel specific transcripts from
channels are involved in the establishment and control of this                         Illumina screen that were statistically enriched in either the
internal environment in the embryonic brain. Such studies will be                      embryo (E15) or adult, as identified by GEO annotations.
needed to define the essential characteristics of exchange                             (XLSX)
mechanisms in brain barrier interfaces that determine properties
of the internal environment of the brain. It remains to be shown                       Table S5 Synaptic transcripts. A dataset containing synaptic
how specific properties of this internal environment contribute to                     transcripts from Illumina screen that were statistically enriched in
brain development and whether deficiencies in these mechanisms                         either the embryo (E15) or adult, as identified by GEO
may contribute to maldevelopment of the brain or neurological                          annotations.
disorders later in life.                                                               (XLSX)

Supporting Information                                                                 Author Contributions

Table S1 Complete Excel spread sheet. The Excel spread                                 Conceived and designed the experiments: SAL KMD H-CB J-FG-E NRS.
sheet containing the comprehensive raw transcript count dataset                        Performed the experiments: SAL CJE HL IK KM. Analyzed the data:
from Illumina platform. Values refer to individual counts for each                     SAL KMD HB H-CB HL MW NS KM J-FG-E NRS. Wrote the paper:
transcript. ‘AVE’ columns are average data for each age.                               SAL KMD MDH HB H-CB MW NS KM J-FG-E NRS.
(XLSX)
                                                                                        17. Johansson PA, Dziegielewska KM, Ek CJ, Habgood MD, Liddelow SA, et al.
Table S2 Full normalised dataset. A dataset containing all                                    (2006) Blood-CSF barrier function in the rat embryo. Eur J Neurosci 24(1): 65–
normalised data with differential expression between embryo (E15)                             76.
and adult.
(XLSX)                                                                                  18. Keep RF, Jones HC (1990) A morphometric study on the development of the
                                                                                              lateral ventricular choroid plexus, choroid plexus capillaries and ventricular
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PLOS ONE | www.plosone.org                                                             17 July 2013 | Volume 8 | Issue 7 | e65629
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