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Oreochromis niloticus

ABSTRACT: Transcriptome of liver from Nile tilapia fed on 1%, 7% and 13% lipid content diets

PROVIDER: PRJNA271195 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1752053_1.fastq.gz	Fastqsanger.gz
	SRR1752053_2.fastq.gz	Fastqsanger.gz
	SRR1752057_1.fastq.gz	Fastqsanger.gz
	SRR1752057_2.fastq.gz	Fastqsanger.gz
	SRR1752058_1.fastq.gz	Fastqsanger.gz

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Oreochromis niloticus

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Identification of potential pathways whereby dietary high fat induced hepatic lipid metabolic disorder of Oreochromis niloticus through long non-coding RNAs

Project description:Genetically improved farmed tilapia (Oreochromis niloticus, GIFT) is prone to hepatic metabolic imbalance and suffer from fatty liver disease during the intensive farming. Long non-coding RNAs (lncRNAs) performed essential roles in varieties of biological processes, including lipid metabolism. However, the lncRNAs regarding hepatic lipid metabolism in tilapia have not been identified. In this study, Illumina sequencing and bioinformatic analysis was performed on the liver of male GIFT juvenile fed with high-fat diet (HFD, 18.5% lipid) or normal-fat diet (NFD, 8% lipid) for 56 days. RNA-seq analyses revealed 299 differentially expressed (DE)-mRNAs and 284 DE-lncRNAs between these two groups. The transcript expression of 16 candidates (eight DE-mRNA and eight DE-lncRNAs) was verified by qRT-PCR, and the results were consistent with those of RNA-seq. Furthermore, 65 cis targets and 3610 trans targets of DE-lncRNAs were predicted. Functional analyses suggested that multiple metabolic pathways was changed in response to high-fat intake, including PPAR signaling pathway, Fatty acid degradation and Fatty acid metabolism, among others. Co-expression networks was constructed and indicated that most lncRNAs interact with numerous mRNAs involved in lipid metabolism, and vice versa. Additionally, expression patterns analysis of three lncRNAs (MSTRG.14598.1, MSTRG.6725.3 and MSTRG.13364.2) and their potential targets (faldh, slc25a48 and fabp7a) associated with PPAR signaling pathway were investigated. Our study provides a basis for further explore the functions of lncRNAs associated with lipid metabolism in tilapia.

2023-09-01 | GSE211712 | GEO

Total RNA sequencing of the liver tissues of Oreochromis niloticus (Nile Tilapia) and of Pundamilia nyerei

Project description:Cichlids fishes exhibit extensive phenotypic diversification and speciation. In this study we integrate transcriptomic and proteomic signatures from two cichlids species, identify novel open reading frames (nORFs) and perform evolutionary analysis on these nORF regions. We embark comparative transrcriptomics and proteogenomic analysis of two metabolically active tissues, the testes and liver, of two cichlid species Oreochromis niloticus (Nile tilapia, ON) and Pundamilia nyererei (Makobe Island, PN). Our results suggest that the time scale of speciation of the two species can be better explained by the evolutionary divergence of these nORF genomic regions.

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Nile tilapia (Oreochromis niloticus) gene expression profiling in males and females at early embryonic development (2, 5 and 9 days post fertilization )

Project description:Commercial production of tilapia relies on monosex cultures of males, which so far proved difficult to maintain in large scale production facilities. Thus, a better understanding of the genetic architecture of the complex trait of sex determination in tilapia is needed.We aimed to detect genes that were differentially expressed by gender at early embryonic development. Artificial fertilization of O. niloticus females with either sex-reversed males (ΔXX) or genetically-modified YY 'supermales' resulted in all-female and all-male embryos, respectively. Pools of all-female and all-male embryos at 2, 5 and 9 days post fertilization were used for custom Agilent eArray. 56 pool samples of Nile tilapia full siblings groups (female or male) at day 2, 5 or 9 post fertilization were subjected to total RNA extraction from whole embryo tissues and hybridized to the custom Agilent array. Each sample was yielded from different cross of artificial fertilization: six dams X five sires. The resulting gender were known based on the sire, sex-reversed males (ΔXX) or genetically-modified YY 'supermales' resulted in all-female and all-male embryos, respectively.

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