Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptomic analysis reveals the involvement of canonical Wnt signaling in zebrafish gonad differentiation

ABSTRACT: Zebrafish males undergo a juvenile ovary to testis type gonadal transformation process. To understand how juvenile ovary-to-testis transformation in zebrafish is genetically regulated, we compared the transcriptomes of juvenile ovary (JO) and juvenile ovotestis (JOT) samples at 35 dpf using the Gonad Uniclone Microarray v1 (ArrayExpress ID: A-MEXP-838). We also analyzed the transcriptomes of the 32 dpf JO, 32 dpf JOT, 34 dpf JOT, and 36 dpf JOT gonads using the slightly modified Gonad Uniclone Microarray v2 and together with the 35 dpf JO and 35 dpf JOT samples, compared the JO samples against the JOT samples to identify genes that could be potentially involved in the gonad transformation process.

ORGANISM(S): Danio rerio

SUBMITTER: Junhui Jiang

PROVIDER: E-MEXP-3879 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Gonad differentiation in zebrafish is regulated by the canonical Wnt signaling pathway.

Sreenivasan Rajini R Jiang Junhui J Wang Xingang X Bártfai Richárd R Kwan Hsiao Yuen HY Christoffels Alan A Orbán László L

Biology of reproduction 20140227 2

Zebrafish males undergo a "juvenile ovary-to-testis" gonadal transformation process. Several genes, including nuclear receptor subfamily 5, group A (nr5a) and anti-Müllerian hormone (amh), and pathways such as Tp53-mediated germ-cell apoptosis have been implicated in zebrafish testis formation. However, our knowledge of the regulation of this complex process is incomplete, and much remains to be investigated about the molecular pathways and network of genes that control it. Using a microarray-ba ...[more]

PMID: 24174574

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Project description:Oxidative stress is an important mechanism of chemical toxicity, contributing to teratogenesis as well as to cardiovascular and neurodegenerative diseases. Developing animals may be especially sensitive to chemicals causing oxidative stress. To assess the response to chemicals at different stages of development, zebrafish (Danio rerio) embryos at 1, 2, 3, 4, 5, and 6 days post-fertilization (dpf) were exposed to 0.1% dimethyl sulfoxide (DMSO), 2 nM 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or 10 uM tert-butylhydroquinone (tBHQ) for 6 hr. Transcript abundance was assessed by real-time qRT-PCR and microarray (Agilent 22k). By microarray, 1477 probes were significantly different among the DMSO-, tBHQ-, and TCDD-treated embryos at 4 dpf. Of these, 220 were 2-fold or greater up-regulated and 108 were 2-fold or greater down-regulated by tBHQ. For TCDD, 17 probes were 2-fold or greater up-regulated and 6 were 2-fold or greater down-regulated. Genes induced by tBHQ, included genes involved in glutathione synthesis and utilization, signal transduction, and DNA damage / stress response. Keywords: Danio rerio, TCDD, tBHQ, oxidative stress, gene expression Separate groups of 30 embryos generated from TL adults were placed in 15 ml egg water in a 10-cm glass petri and at 1, 2, 3, 4, 5, and 6-dpf were exposed for 6 hr to 0.1% dimethyl sulfoxide (DMSO), 2 nM 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or 10 uM tert-butylhydroquinone (tBHQ) (4 replicates per compound per time point). Embyros were frozen immediately after the 6 hr exposure and RNA isolated for microarray analysis. A Universal RNA Reference Sample was created by mixing equal amounts of total RNA from 2 replicates each from all toxicants (TCDD, tBHQ, DMSO) and timepoints (1, 2, 3, 4, 5, 6-dpf). Based on qRT-PCR results, the 4 dpf timepoint was selected for microarray analysis, in which the RNA samples (4 replicates per compound) were Cy3 labeled and co-hybridized with Cy5 labeled Universal RNA Reference Sample to generate data for analysis of variance.

Dataset Information

Transcriptomic analysis reveals the involvement of canonical Wnt signaling in zebrafish gonad differentiation

Publications

Gonad differentiation in zebrafish is regulated by the canonical Wnt signaling pathway.

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