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Generation of mature lung alveolar epithelial cells from human pluripotent stem cells

ABSTRACT: Generation of mature lung alveolar epithelial cells from human pluripotent stem cells

PROVIDER: PRJNA544726 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9121350.fastq.gz	Fastqsanger.gz
	SRR9121351.fastq.gz	Fastqsanger.gz
	SRR9121352.fastq.gz	Fastqsanger.gz
	SRR9121353.fastq.gz	Fastqsanger.gz
	SRR9121354.fastq.gz	Fastqsanger.gz

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Generation of mature lung alveolar epithelial cells from human pluripotent stem cells

Project description:We perform time-series global transcriptomic profiling of a directed differentiation protocol for generating alveolar epithelial type II cells (AEC2s) from pluripotent stem cells (PSCs). We analyzed 3 different timepoints in the RUES2 differentiation: 1) Day 0 undifferentiated cells, 2) Day 15 lung progenitors highly enriched in NKX2-1+ cells by CD47hi/CD26lo sorting, and 3) the outgrowth of these purified progenitors in 3D culture sorted again on Day 35 based on SFTPCtdTomato+ and SFTPCtdTomato- gating. For comparison to primary cells, we simultaneously sequenced RNA from purified primary fetal (21 week gestation) distal alveolar epithelial progenitors and purified adult human (HTII-280 sorted) AEC2s. In order to evaluate the effect of cell culture on primary fetal alveolar cells, parallel aliquots of the fetal cells were also exposed to 4 days of culture in DCI media. We find that AEC2 maturation involves downregulation of Wnt signaling activity, and that the highest differentially expressed transcripts in iPSC-derived AEC2s encode genes associated with lamellar body and surfactant biogenesis.

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Project description:We performed proteomic and phosphoproteomic profiling of cells derived from human induced pluripotent stem cells (iPSCs) using our previously described distal lung directed differentiation protocol to generate alveolar epithelial type 2 cells (iAEC2s). We used the SPC2 human iPSC line and specifically the SPC2-ST-B2 (SFTPCtdT/WT) and SPC2-ST-C11 (SFTPCI73T/tdT) clones containing a SFTPCtdTomato knock-in reporter. SFTPCtdTomato+ cells were sorted on day 41 and again on day 79 of differentiation. iAEC2s were single-cell passaged in self-renewing 3D alveolosphere cultures approximately every 2 weeks through day 113. Live SFTPCtdTomato+ iAEC2s were sorted on day 113 and processed for mass spectrometry. We find that mutant (SFTPCI73T/tdT) iAEC2s display a less proliferative and more mature AEC2 phenotype compared to their corrected (SFTPCtdT/WT) counterparts with a concomitant upregulation of lysosomal and autophagy related pathways and activation of the NF-κB pathway in mutant cells.

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Project description:We perform transcriptomic profiling of cells derived from human induced pluripotent stem cells (iPSCs) using distal lung directed differentiation protocol previously described to generate alveolar type II epithelial-like cells (iAEC2s). We use the BU3 ABCA3:GFP iPSC line containing a GFP knock-in fluorescent reporter for the canonical AEC2 gene, ABCA3, to sort out pure populations of GFP positive and negative cells on day 31 of distal lung differentiation for bulk RNA sequencing analysis. We find canonical AEC2s transcripts as well as lamellar body-associated transcripts to be enriched in the ABCA3:GFP positive population suggestive of enrichment of AEC2 program. In contrast, we find non-lung endodermal lineages to be enriched in the ABCA3:GFP negative cells. Combined, these findings indicate the reliability of the ABCA3:GFP reporter in enriching iAEC2s in our in vitro distal lung directed differentiation protocol.

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