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Relative gene expression of the lateral choroid plexus isolated from Abhd2+/+ and Abhd2-/- mice

ABSTRACT: Electrophysiological studies of mouse choroid plexus show potentiation of the Kir7.1 channel by progesterone (P4). The choroid plexus (CP) epithelium contains several membrane-bound progesterone receptors that could potentially mediate the cell response to P4. Interestingly, we found that the recently characterized progesterone receptor α/β hydrolase domain–containing protein 2 (ABHD2)(Miller et al., 2016) is also highly expressed in the CP. ABHD2 has been shown to regulate ion channel activation in human sperm cells by breaking down the endocannabinoid 2-arachidonoylglycerol in the cell membrane(Miller et al., 2016). However, CPECs isolated from global Abhd2 knockout mice that were generated in our lab(Ida Björkgren, 2019) showed similar expression and activation of Kir7.1 as cells from wild type animals, thus negating any possible effect of the receptor on Kir7.1 activation.

ORGANISM(S): Mus musculus

PROVIDER: GSE181594 | GEO | 2021/08/10

REPOSITORIES: GEO

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Gene expression study in choroid plexus

Project description:The choroid plexus (CP) constitutes one of the blood–brain barriers – the blood cerebrospinal fluid barrier. It is formed by a monolayer of epithelial cells located within the brain ventricles and in addition to be responsible for the formation of the cerebrospinal fluid (CSF) is ideally positioned to transmit signals into and out of the brain. Specifically, here, we evaluated the overall kinetic response of the mouse CP to peripheral administration of lipopolysaccharide (LPS) that is the Gram-negative bacteria cell wall. This study shows that as soon as 1h after the injection, the CP responds by altering the expression of several genes. This response reaches a maximum at 3h and returns to the basal profile for most of the transcripts at 72h. To do this analysis we compared the CP transcriptome of LPS injected animals with the CP transcriptome of saline injected animals and using this we also dissect the CP basal transcriptome. From this analysis we confirm that the genes most highly expressed were those implicated in energy metabolism (oxidative phosphorylation, glycolysis/gluconeogenesis) and in ribosomal function, which is in agreement with the secretory nature of the CP. Finally, we also describe genes not previously identified as being expressed in the basal CP. Gene expression study in choroid plexus. Time series after acute LPS treatment

2010-08-19 | E-GEOD-23714 | biostudies-arrayexpress

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Comparison of the Global Gene Expression of Choroid Plexus and Meninges and Associated Vasculature under Control Conditions and after Pronounced Hyperthermia or Amphetamine Toxicity

Project description:These tissue were harvested to complement and extend the studies that generated GSE23093. They served 3 purposes; 1) identify genes important to choroid plexus function and compare them with those important for meninges and associated vasculature (MAV) function, 2) determine genes in the choroid plexus and sensitivity hyperthermia and amphetamine toxicity, 3) identify the important gene expression changes related to the immune system in MAV, choroid plexus and trunk' blood Gene mRNA expression patterns in choroid plexus and trunk blood were determined under control conditions as well as after (3 hr and 1day) exposure to either environmentally-induced hyperthermia or neurotoxic doses of amphetamine. This data was analyzed and compared to data from meninges and associated vasculature previously deposited in GEO. The data gathered under control conditions was used to further understand how the choroid plexus and meninges and associated vasculature might function to generate and regulate the cerebrospinal fluid. The expression patterns in the choroid plexus after environmentally-induced hyperthermia or neurotoxic doses of amphetamine was determine its damage and protective responses. The expression patterns after environmentally-induced hyperthermia or neurotoxic doses of amphetamine were compared among choroid plexus, meninges and associated vasculature and blood were analyzed to determine immune system responses.

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Choroid Plexus-Derived Insulin Inhibits Feeding via Direct Signaling through Arcuate Nucleus

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2021-02-11 | PXD021076 | Pride

OTX2 homeoprotein regulates adult choroid plexus activity

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Aging-induced type I interferon response at the choroid plexus negatively affects brain function.

Project description:We investigated gene expression profile of the Brain's choroid plexus and other organs of young and aged mice. Additionally, we analysed gene expression profile of the choroid plexus in iso- and heterochronic- parabiosis settings of young and aged mice. 75 samples

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Spatially heterogeneous choroid plexus transcriptomes encode positional identity and contribute to regional cerebrospinal fluid production

Project description:A sheet of choroid plexus epithelial cells extends into each cerebral ventricle and secretes signaling factors into the cerebrospinal fluid (CSF). To evaluate whether differences in the CSF proteome across ventricles arise, in part, from regional differences in choroid plexus gene expression, we defined the transcriptome of lateral ventricle (telencephalic) vs. fourth ventricle (hindbrain) choroid plexus. We find that positional identities of mouse, macaque, and human choroid plexi derive from gene expression domains that parallel their axial tissues of origin. We then show that molecular heterogeneity between telencephalic and hindbrain choroid plexi contributes to region-specific, age-dependent protein secretion in vitro. Transcriptome analysis of FACS-purified choroid plexus epithelial cells also predicts their cell type-specific secretome. Spatial domains with distinct protein expression profiles were observed within each choroid plexus. We propose that regional differences between choroid plexi contribute to dynamic signaling gradients across the mammalian cerebroventricular system.

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