Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcript expression in circulating whole blood after saline injections

ABSTRACT: These experiments were designed to produce the appropriate controls so that their cohort's transcript (mRNA) changes in whole circulating blood could be determined. The cohorts were exposed to D-amphetamine under a neurotoxic and non-neurotoxic condition or subjected to elevated environmental temperatures that produced a hyperthermia very similar to heat stroke. The cohort data is in a separate, but linked, GEO file. Animals were given four doses of 1 ml/ kg of normal saline with two hours in between each dose. The animals body temperature was determined every 1 h and the rats were sacrificed 3 h after the last saline injection. Animals were not given access to food or water during this period so that they were more suitable controls for the amphetamine treatment groups

ORGANISM(S): Rattus norvegicus

SUBMITTER: John Bowyer

PROVIDER: E-GEOD-62368 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Evaluating the Stability of RNA-Seq Transcriptome Profiles and Drug-Induced Immune-Related Expression Changes in Whole Blood.

Bowyer John F JF Tranter Karen M KM Hanig Joseph P JP Crabtree Nathaniel M NM Schleimer Robert P RP George Nysia I NI

PloS one 20150715 7

Methods were developed to evaluate the stability of rat whole blood expression obtained from RNA sequencing (RNA-seq) and assess changes in whole blood transcriptome profiles in experiments replicated over time. Expression was measured in globin-depleted RNA extracted from the whole blood of Sprague-Dawley rats, given either saline (control) or neurotoxic doses of amphetamine (AMPH). The experiment was repeated four times (paired control and AMPH groups) over a 2-year span. The transcriptome of ...[more]

PMID: 26177368

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Project description:Oligo array analysis with bioinformatics tools identified genes with very high expression levels in the meninges, arachnoid and pial membranes, and associated vasculature (MAV) as potentially important and unique to these tissues in rat. It was also determined whether these genes were more sensitive to expression changes after a neurotoxic exposure to amphetamine (AMPH). Gene expression in the vascular rich MAV was compared to the neuronal rich tissues of the striatum and parietal cortex. In controls, 850 genes differed by more than 5-fold when comparing the MAV to both striatum and parietal cortex. Genes specifically identified with the blood-brain barrier (BBB) were also expressed at high levels indicating they may help form tight junctions in MAV. Genes with 15-fold or greater expression in MAV compared to striatum or cortex are of potential uniqueness and importance to MAV function. Many of the identified genes are abundant in different types of epithelial tissue and function in binding, transport or metabolize ions and solute, and may help MAV regulate cerebrospinal fluid. Many others with high expressions are involved in immune system function possibly serving to facilitate lymphocyte and macrophage trafficking in vasculature and cerebrospinal fluid. Expression in the MAV has similarities to the choroid plexus indicating considerable overlap in functions. Genes in MAV with a higher expression (relative to brain) were affected in greater numbers than expected by EIH and AMPH (SIGNIFICANT?). Many expression increases evoked by AMPH and EIH in MAV relate to reactive oxidative stress and inflammation. However, AMPH induced more robust alterations in the expression of genes related to ion/solute transport, lipid metabolism, bacterial infection and damage than EIH. The BBB-related genes Sox18 and Cldn5 expression decreased more with AMPH than EIH, and Cldn 9 and Esam were increase only by AMPH. It is not known how these changes affect BBB function and integrity. Gene expression patterns in MAV were compared to two regions of brain (striatum and parietal cortex) to identify genes important to MAV function and determine whether their expressions were sensitive to a neurotoxic exposure to amphetamine.

Dataset Information

Transcript expression in circulating whole blood after saline injections

Publications

Evaluating the Stability of RNA-Seq Transcriptome Profiles and Drug-Induced Immune-Related Expression Changes in Whole Blood.

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