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RNA-seq analysis of hilar and peripheral biliary organoids from a mouse model of Alagille syndrome

ABSTRACT: RNA-seq analysis of hilar and peripheral biliary organoids from a mouse model of Alagille syndrome

PROVIDER: PRJNA954833 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24149801_1.fastq.gz	Fastqsanger.gz
	SRR24149801_2.fastq.gz	Fastqsanger.gz
	SRR24149802_1.fastq.gz	Fastqsanger.gz
	SRR24149802_2.fastq.gz	Fastqsanger.gz
	SRR24149803_1.fastq.gz	Fastqsanger.gz

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RNA-seq analysis of hilar and peripheral biliary organoids from a mouse model of Alagille syndrome

Project description:To study molecular differences in wild-type and regenrated bile ducts in a mouse model of Alagille syndrome (Andersson, Chivukula, Hankeova, et al. Gastroenterology, 2018;154(4):1080-1095), we derived intrahepatic cholangiocyte organoids from hilar (pICOs) and peripheral (pICOs) regions of adult livers following a published protocol for organoids derivation and culture (Broutier et al., Nat Protoc. 2016;11:1724–1743). At passage 5, we isolated total RNA and performed bulk RNA-sequencing on 3 biological replicates from each region and genotype.

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Project description:Although providing promising and unique tools for studying cholangiocytes, current tissue-derived cholangiocyte-organoid systems do not recapitulate the complex architecture of the intrahepatic bile ducts in vitro. Here, we report a new method for creating branching cholangiocyte organoids (BRCO) from human adult tissue to study the intrahepatic biliary tree and diseases. BRCOs self-organize into large complex tubular structures, while closely resembling primary cholangiocytes on a transcriptomic and functional level. They are capable of mimicking branching bile duct development as well as being used for studying diseases in which the biliary tree does not develop properly (Alagille Syndrome). Furthermore, we deliver evidence that our culture method allows for formation of complex cholangiocyte cancer (cholangiocarcinoma, CCA) organoids. These branching CCA organoids resemble the primary tumor more closely compared to previously published protocols as well as showing unique tumor-specific drug responses. In conclusion, our culture method allows for creation of novel (malignant) cholangiocyte-organoids to study the intrahepatic bile ducts.

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Project description:Background: RNASeq was performed on organoids derived from livers of normal healthy donors and patients with biliary atresia to characterize transcriptomic signatures. Methods: Organoids generated from livers of normal healthy donors and patients with biliary atresia were cultured either in expansion (undifferentiated: 3 NCOs and 11 BACOs) or differentiation medium (differentiated: 3 BACOs). Liver tissues obtained from deceased-donor subjects served as normal controls (N=3). Total RNA was isolated from organoids and liver biopsy tissue specimens. Results: Organoids from patients with biliary atresia showed abnormal cell polarity, loss of tight junctions, increased permeability and decreased expression of genes related to epidermal growth factor (EGF)- and fibroblast growth factor 2 (FGF2)-signaling. When treated with EGF+FGF2, biliary atresia organoids expressed differentiation and functional markers with restored cell polarity. Conclusion: Organoids from biliary atresia are viable and have evidence of halted epithelial development. The induction of developmental markers, improved cell‐cell junction, and decreased epithelial permeability by EGF and FGF2 identifies potential strategies to promote epithelial maturation and function.

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