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9-cis-retinoic acid improves disease modelling in iPSC-derived liver organoids

ABSTRACT: 9-cis-retinoic acid improves disease modelling in iPSC-derived liver organoids

PROVIDER: PRJNA1242238 | ENA |

REPOSITORIES: ENA

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	SRR32868337.fastq.gz	Fastqsanger.gz
	SRR32868338.fastq.gz	Fastqsanger.gz
	SRR32868343.fastq.gz	Fastqsanger.gz
	SRR32868344.fastq.gz	Fastqsanger.gz

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9-cis-retinoic acid improves disease modelling in iPSC-derived liver organoids

Project description:Liver fibrosis majorly impacts global health, necessitating development of in vitro models to study disease mechanisms and develop drug therapies. Relevant models should at least include hepatocytes and hepatic stellate cells (HSCs) and ideally use three-dimensional cultures to mimic in vivo conditions. Induced pluripotent stem cells (iPSCs) allow patient-specific liver modelling, but current models based on iPSC-derived hepatocytes (iHepatocytes) and HSCs (iHSCs) still lack key functions. We developed organoids of iHepatocytes and iHSCs, and compared them to HepaRG and primary HSC organoids. RNA-sequencing analysis comparison of these cultures identified a potential role for the transcription factor RXRA in hepatocyte differentiation and HSC quiescence. Treating cells with the RXRA ligand 9-cis-retinoic acid (9CRA) promoted iHepatocyte metabolism and iHSC quiescence. In organoids, 9CRA enhanced fibrotic response to TGF-β and acetaminophen, highlighting its potential for refining iPSC-based liver fibrosis models to more faithfully replicate human drug-induced liver injury and fibrotic conditions.

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Project description:We are presenting the application of toxicogenomics in the evaluation of the toxic effects of retinoic acid and one of its isoforms the 9-cis retinoic acid. The main goal is to distinguish the pattern of action of the both chemical compounds and their action in an extended exposure. The results suggest a different pattern within the days and the chemicals. Representatives of each GO functional groups were selected and quantified by real-time PCR to validate the microarray data and to differentiate the action of retinoic acid compounds studied.

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Differentiation of SH-SY5Y cells by 9 cis retinoic acid

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Project description:The pathogenesis of acne has been linked to multiple factors such as increased sebum production, inflammation, follicular hyperkeratinization, and the action of Propionibacterium acnes within the follicle. 13-cis Retinoic Acid (13-cis RA, isotretinoin) is the most potent agent in acne treatment. Surprisingly, its mechanism of action in acne is still unknown. Gene expression profiling of cultured human immortalized sebocytes (SEB-1) treated with 13-cis RA was performed to gain insights into its sebocyte-specific mechanism of action. SEB-1 sebocytes were cultured with 0.1 uM 13-cis RA for 72 hours or vehicle control. Gene array expression profiling was conducted using Affymetrix HG-U95Av2 arrays in order to examine changes in gene expression as a result of treatment. A total of 85 genes (78 different genes) were significantly influenced by 13-cis RA: 58 were upregulated and 27 were down-regulated. There were changes in several genes involved in apoptosis and innate immunity. These studies are the first describing the sebocyte- specific response in gene expression associated with isotretinoin therapy and are valuable in identifying potential therapeutic targets in acne. Keywords: effects of 72 hour 13-cis RA treatment on cultured human sebocyte cells (SEB-1)

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