Project description:Laser capture microdissected choroid plexuses were obtained and expression arrays were generated to investigate gene expression in wt and ApoE choroid plexuses; the choroid plexus forms the cerebrospinal fluid, the cerebrospinal fliod barrier, functions as the major gateway for blood-born leukocytes to enter the brain in degenerative and inflammatory brain diseases, and the principal neuroimmune interface in the brain. We found lipid deposits in the aged choroid plexus of hyperlipidemic mice but none in the wt control choroid plexuses. Here, we studied the functional impact and gene epressions in wt and ApoE-deficient choroid plexuses.
Project description:Previous work has led us to examine the differences in the choroid plexus function in B10.pl WT mice versus B10.PL RAG-/- mice. We believe that there is a difference between those that are normal functioning and those that are lymphocyte deficient. To determine the gene expression profile of the choroid plexus in wild type mice as compared to those that are lymphocyte deficient. We hypothesize that there is altered expression in the genes that mediate cellular adhesion in choroid plexus from wild type mice as compared to those that are lymphocyte deficient. 8-10 week old animals (age and sex matched) were injected with Evan's blue post anesthetization. After waiting an hour the animals were euthanized and their brains were extracted and placed in RNALater for 24 hours. The brains were then sliced sagitally Keywords: RAG mutant, choroid plexus
Project description:Previous work has led us to examine the differences in the choroid plexus function in B10.pl WT mice versus B10.PL RAG-/- mice. We believe that there is a difference between those that are normal functioning and those that are lymphocyte deficient. To determine the gene expression profile of the choroid plexus in wild type mice as compared to those that are lymphocyte deficient. We hypothesize that there is altered expression in the genes that mediate cellular adhesion in choroid plexus from wild type mice as compared to those that are lymphocyte deficient. 8-10 week old animals (age and sex matched) were injected with Evan's blue post anesthetization. After waiting an hour the animals were euthanized and their brains were extracted and placed in RNALater for 24 hours. The brains were then sliced sagitally
Project description:To study effect of VRK1 deletion on spermatogenesis of the mouse, transciptomic analysis of genes in postnatal 8-day testicular cells of wild type and VRK1-deficient Mus musculus was performed.
Project description:To study effect of VRK1 deletion on spermatogenesis of the mouse, transciptomic analysis of genes in postnatal 8-day testicular cells of wild type and VRK1-deficient Mus musculus was performed. Gene expression in testes from from wild type and VRK1-deficient mutant Mus musculus, respectively, was measured. Four independent experiments for wild type and mutant, respectively, were performed.
Project description:Laser capture microdissected choroid plexuses were obtained and expression arrays were generated to investigate gene expression in ApoE-Knockin choroid plexuses; the choroid plexus forms the cerebrospinal fluid, the cerebrospinal fliod barrier, functions as the major gateway for blood-born leukocytes to enter the brain in degenerative and inflammatory brain diseases, and the principal neuroimmune interface in the brain. We found lipid deposits in the aged choroid plexus of hyperlipidemic ApoE4-Knockin mice but none in normolipidemic ApoE4-Knockin or normolipidemic or hyperlipidemic ApoE3-Knockin control choroid plexuses. Here, we studied the functional impact and gene epressions these choroid plexuses.
Project description:The choroid plexus is an important source of trophic factors for the developing and mature brain. Recently we described the expression and production of mature insulin in epithelial cells of the choroid plexus, and how its secretion can be modulated by serotonin through Htr2c, a metabotropic receptor that signals via Gq. To understand the function of this choroid plexus-derived insulin, here we describe a way to genetically target epithelial cells of the choroid plexus using a viral vector. With this, we modulated insulin expression and evaluated behavior. Insulin overexpression in the choroid plexus of wild type mice led to an inhibition in feeding, whereas insulin knockdown in choroid plexus of Ins1-/-Ins2fl/fl mice promoted discrete increases in food intake, especially after a period of fasting. Insulin overexpression in choroid plexus induced roust transcriptomic changes in the hypothalamus, most of which related to axonal growth and synapse-related processes. Finally, activation of Gq signaling in insulin-overexpressing choroid plexuses led to acute AKT phosphorylation in neurons of the arcuate nucleus, suggesting a direct action, through the CSF, of choroid plexus-derived insulin on the hypothalamus. Taken together our findings prove that the choroid plexus is a relevant source of insulin in the central nervous system, with physiological implications in feeding behavior. We believe that choroid plexus-derived insulin has to be taken into consideration in future work pertaining insulin actions in the brain.
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.