SR9243 (LXR antagonist) and T3 effects on clownfish larvae
Ontology highlight
ABSTRACT:
ORGANISM(S): Amphiprion ocellaris
PROVIDER: GSE232363 | GEO | 2023/06/22
REPOSITORIES: GEO
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Project description:Investigate the effects of thyroid hormone on Amphiprion ocellaris larvae Amphiprion larvae were treated for 2 days at 10-7M T3
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2010-07-30 | E-GEOD-22643 | biostudies-arrayexpress
Project description:After comparing albinism rate, T3 treatment and control larvae of 42 DAH were chosen for next high-throughput sequencing analyses of miRNA. A total of 337 miRNAs were identified via miRNA-seq and 12 miRNAs exhibited significantly differential expression patterns in D42_T3 vs D42_Con (TPM > 10, fold change ≥ 1.5 or ≤ 0.67 and q ≤ 0.05). These differentially expressed miRNAs targeted 3658 putative genes, further enriching 10 GO terms (q < 0.05).
2019-12-31 | GSE104919 | GEO
Project description:The Liver X Receptors (LXRs) play important roles in multiple metabolic pathways, including fatty acid, cholesterol, carbohydrate and energy metabolism. To expand the knowledge of the functions of LXR signaling during embryonic development, we performed a whole-genome microarray analysis of Lxr target genes in zebrafish larvae treated with either one of the synthetic LXR ligands T0901317 or GW3965. Assessment of the biological processes enriched by differentially expressed genes revealed a prime role for Lxr in regulating lipid metabolic processes, similarly to the function of LXR in mammals. In addition, exposure to the Lxr ligands induced changes in expression of genes in the neural retina and lens of the zebrafish eye, including the photoreceptor guanylate cyclase activators and lens gamma crystallins, suggesting a potential novel role for Lxr in modulating the transcription of genes associated with visual function in zebrafish. The regulation of expression of metabolic genes was phenotypically reflected in an increased absorption of yolk in the zebrafish larvae, and changes in the expression of genes involved in visual perception were associated with morphological alterations in the retina and lens of the developing zebrafish eye. The regulation of expression of both lipid metabolic and eye specific genes was sustained in 1 month old fish. The transcriptional networks demonstrated several conserved effects of LXR activation between zebrafish and mammals, and also identified potential novel functions of Lxr, supporting zebrafish as a promising model for investigating the role of Lxr during development.
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Project description:Hypothyroids wild type and TRbeta -/- mice were treated with T3 and livers were collected and analysed using a microarray with 6500 cDNA probes. Expression ratios were calulated between 1) hypothyroids WT and TRbeta-/- mice 2) hypothyroid WT and hypothyroid TR beta-/- mice treated with T3 and 3) hypothyroid TRbeta-/- and hypothyroid TRbeta-/- treated with T3. Keywords: other
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Project description:Diurnal (i.e., 24-hour) physiological rhythms depend on transcriptional programs controlled by a set of circadian clock genes/proteins. Systemic factors like humoral and neuronal signals, oscillations in body temperature, and food intake align physiological circadian rhythms with external time. Thyroid hormones (THs) are major regulators of circadian clock target processes such as energy metabolism, but little is known about how fluctuations in TH levels affect the circadian coordination of tissue physiology. In this study, a high triiodothyronine (T3) state was induced in mice by supplementing T3 in the drinking water, which affected body temperature, and oxygen consumption in a time-of-day dependent manner. 24-hour transcriptome profiling of liver tissue identified 37 robustly and time independently T3 associated transcripts as potential TH state markers in the liver. Such genes participated in xenobiotic transport, lipid and xenobiotic metabolism. We also identified 10 – 15 % of the liver transcriptome as rhythmic in control and T3 groups, but only 4 % of the liver transcriptome (1,033 genes) were rhythmic across both conditions – amongst these several core clock genes. In-depth rhythm analyses showed that most changes in transcript rhythms were related to mesor (50%), followed by amplitude (10%), and phase (10%). Gene set enrichment analysis revealed TH state dependent reorganization of metabolic processes such as lipid and glucose metabolism. At high T3 levels, we observed weakening or loss of rhythmicity for transcripts associated with glucose and fatty acid metabolism, suggesting increased hepatic energy turnover. In sum, we provide evidence that tonic changes in T3 levels restructure the diurnal liver metabolic transcriptome independent of local molecular circadian clocks.
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