Project description:We applied zebrafish whole genome microarrays to identify molecular effects of suvorexant, imipramine and a orexin antagonist from natural plant. Behavioral assays were performed to analyze for correlations between altered gene expression with effects on the organism level. Central nervous system drug induced gene expression in larval zebrafish brain was measured at 3 hours after exposure of 1uM suvorexant, 1uM imipramine, 10uM 8beta-(4'-Hydroxytigloyloxy) costunolide or 100uM 8beta-(4'-Hydroxytigloyloxy) costunolide. Three independent experiments were performed.Gene expression profile of brain tissue of 10uM 8beta-(4'-Hydroxytigloyloxy) costunolide treated larva showed closest similarity with suvorexant, as assumed by behavior profile.
Project description:Transcriptome analysis of zebrafish wildtype adult brain and rb1-embryonal brain tumors, and wildtype and rb1-/- zebrafish larval head tissue, by RNA-Seq
Project description:The larval brain of Ciona intestinalis has similar architecture to that of vertebrates, but is only composed of approximately 330 cells. Transgenic embryos that carried Ci-beta-tubulin(promoter)::Kaede exhibited robust Kaede expression in the larval brain. Kaede-expressing cells were isolated, and their transcriptome was compared with that of cells that did not express Kaede using an oligonucleotide-based microarray. Our analysis identified 565 candidate genes that were preferentially expressed in the larval brain, 77 of which have previously been reported to be brain-related. The 565 genes included transcription factors, such as Otx, en, Pax3/7, Prop-A, Lhx1, Six3/6, Unc4-A, FoxC, and DMRT1; and signal transduction molecules, such as FGF4/5/6, Hedgehog1, Hedgehog2, patched, Fringe1, and Dkk3. Nearly 30 of the identified genes coded for receptors for neurotransmitters, neuropeptides or hormone pepetides. In addition, 15 genes encoded neuropeptides and hormone peptides, five of which were novel. Our catalog of genes that are expressed in the Ciona larval brain provides a foundation for future studies exploring the complex gene regulatory networks that mediate chordate brain development and function. Two samples (Brain vs Cells without Brain),Two biological replicates,Dye Swap design
Project description:The larval brain of Ciona intestinalis has similar architecture to that of vertebrates, but is only composed of approximately 330 cells. Transgenic embryos that carried Ci-beta-tubulin(promoter)::Kaede exhibited robust Kaede expression in the larval brain. Kaede-expressing cells were isolated, and their transcriptome was compared with that of cells that did not express Kaede using an oligonucleotide-based microarray. Our analysis identified 565 candidate genes that were preferentially expressed in the larval brain, 77 of which have previously been reported to be brain-related. The 565 genes included transcription factors, such as Otx, en, Pax3/7, Prop-A, Lhx1, Six3/6, Unc4-A, FoxC, and DMRT1; and signal transduction molecules, such as FGF4/5/6, Hedgehog1, Hedgehog2, patched, Fringe1, and Dkk3. Nearly 30 of the identified genes coded for receptors for neurotransmitters, neuropeptides or hormone pepetides. In addition, 15 genes encoded neuropeptides and hormone peptides, five of which were novel. Our catalog of genes that are expressed in the Ciona larval brain provides a foundation for future studies exploring the complex gene regulatory networks that mediate chordate brain development and function.
Project description:Zebrafish wildtype adult brain and rb1-embryonal brain tumor transcriptomes were used to identify candidate rb1-interacting chromatin remodelers and epigenetic regulators altered in rb1- transformed brain tumor cells. The data was also used for comparative analysis with zebrafish rb1-/- mutant transcriptome, to identify molecular pathways that distinguish transformed rb1- tumor cells from non-transformed rb1-/- mutant cells.
Project description:The wild type and rb1 mutant transcriptomes were used to identify molecular pathways and epigenetic regulators altered in rb1 mutant brain cells. The data was also used for comparative analysis with zebrafish rb1-embryonal brain tumor transcriptome, to identify molecular pathways that distinguish transformed rb1- tumor cells from non-transformed rb1-/- mutant cells.
Project description:We used different zebrafish transgenic lines to sort macrophages, neutrophils and immature lymphoid cells from 5-6 day old zebrafish larvae and analyzed their transcriptomes. Comparison between the different transcriptomes and gene ontology analysis revealed specificities for each cell population. Comparison with previously published data showed that zebrafish larval macrophages expressed several known human M1 and M2 macrophages. Transcriptome analysis of uninfected and infected macrophages from embryos infected by of Mycobacterium marinum revealed infection induced transcriptional changes and a shift towards M1 transcriptomic signature.
Project description:The cellular composition of the brain and how it is affected by starvation, remains largely unknown. Here we introduce a single-cell transcriptome atlas of the entire Drosophila melanogaster first instar larval brain. We first assigned cell type identity based on the expression of previously characterized marker genes, allowing us to distinguish five major groups: neural progenitors cells, differentiated neurons, glial cells, undifferentiated neurons as well as non-neural cells corresponding to organs and structures located adjacent to the brain. All major classes were further subdivided into multiple subtypes based on cluster analysis, revealing critical biological features of various cell types. Moreover, we included two different feeding conditions: normal fed versus starved. After starvation, the transcriptional profile of several cell clusters were altered, while the overall composition of the brain remains unaffected. Intriguingly, different cell clusters show very distinct responses to starvation, suggesting the presence of cell-specific programs for nutrition availability. Establishing a single-cell transcriptome atlas of the larval brain provides a powerful tool to explore cell diversity, assess genetic profiles of neurogenic, neuronal and glial cell types. The analysis of neurotransmitters, neuropeptides and their respective receptors may further open the doors for functional studies.
Project description:In this work we investigated how the brain proteome of the larval zebrafish is modified by behavioral adaptation to the environmental challenge of a water vortex. We monitored the behavior of larvae and observed that they behaviorally adapted to the presence of a water vortex. We obtained the larval zebrafish brain proteome by extracting brains from zebrafish larvae and analyzing them using and LFQ-based LC-MS/MS-approach. In total we identified 5929 proteins in the larval brain. Within this proteome, we identified 57 proteins that were significantly regulated following experience of the water vortex: 41 proteins were up regulated and 16 were down regulated. Of these, 29 proteins are known to have neuronal functions, 17 proteins are known to have other cellular functions, and 11 proteins are still uncharacterized.