CDK5RAP3 regulates hepatocyte differentiation in human
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ABSTRACT:
PROVIDER: PRJNA1064096 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR27532157.fastq.gz | Fastqsanger.gz | |||
| SRR27532158.fastq.gz | Fastqsanger.gz | |||
| SRR27532159.fastq.gz | Fastqsanger.gz | |||
| SRR27532160.fastq.gz | Fastqsanger.gz |
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Project description:CDK5RAP3, an UFL1 adaptor for UFMylation, is crucial for liver development in mouse. However, the function of CDK5RAP3 in human hepatocyte differentiation remains unclear. The stepwise generation of hepatocyte-like cells derived from human embryonic cells simulates human hepatocyte differentiation in vitro. Here, the human embryonic cells were conducted to differentiate into hepatocytes and ScRNA-Seq analysis was performed to elucidate the molecular mechanism of CDK5RAP3 in human liver development. We found CDK5RAP3 was important for human hepatocytes differentiation. The CDK5RAP3 deficiency upregulated ER stress in hepatic-endoderm stage, and impaired ribosome homeostasis in mature hepatocytes.
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Project description:The availability of pluripotent stem cells offers the possibility of using such cells to model hepatic disease and development. With this in mind, we previously established a protocol that facilitates the differentiation of both human embryonic stem cells and induced pluritpotent cells into cells with hepatocyte characteristics. The use of highly defined culture conditions and the avoidance of feeder cells or embryoid bodies allowed synchronous and reproducible differentiation to occur. The differentiation toward a hepatocyte–like fate appeared to recapitulate many of the stages normally associated with the formation of hepatocytes in vivo. In the current study we addressed the feasibility of using human pluripotent stem cells to probe the molecular mechanisms underlying human hepatocyte differentiation. We demonstrate i) that human ES cells express a number of mRNAs that characterize each stage in the differentiation process, ii) that gene expression can be efficiently depleted throughout the differentiation time course using shRNAs expressed from lentiviruses, and iii) that the nuclear hormone receptor HNF4a is essential for specification of human hepatic progenitor cells by establishing expression of the network of transcription factors that control hepatocyte cell fate.
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Project description:During embryonic development DNA methylation is highly dynamic, although less is known about the stability and fine-tuning of DNA methylation at later stages of differentiation. To understand the role of DNA methylation during hepatocyte differentiation, we profiled approximately 450k methylation sites at different time points in the progression from hepatoblast to hepatocyte stages using the bipotent liver progenitor HepaRG cell line. Progressive demethylation of HNF4A P1 was highly correlated with increased expression of the shorter isoforms of HNF4A. In addition, the absence of cell division at later stages of differentiation and the increased expression of TET1 and TET2 transcripts indicates that a process of active demethylation is taking place at this specific locus. These data suggest that liver progenitors are poised for targeted demethylation at specific genomic locations involved in terminal stages of hepatocyte differentiation.
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