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Transplanted Human Intestinal Organoids: A Resource for Modeling Human Intestinal Development

ABSTRACT: Transplanted Human Intestinal Organoids: A Resource for Modeling Human Intestinal Development

PROVIDER: PRJNA942271 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23747900.fastq.gz	Fastqsanger.gz
	SRR23747901.fastq.gz	Fastqsanger.gz
	SRR23747902.fastq.gz	Fastqsanger.gz
	SRR23747903.fastq.gz	Fastqsanger.gz
	SRR23747904.fastq.gz	Fastqsanger.gz

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Transplanted Human Intestinal Organoids: A Resource for Modeling Human Intestinal Development

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Project description:The in vitro differentiation of pluripotent stem cells into human intestinal organoids (HIOs) has served as a powerful means for creating complex three-dimensional intestinal structures. Owing to their diverse cell populations, transplantation into an animal host is supported with this system and allows the temporal formation of fully laminated structures, including crypt-villus architecture and smooth muscle layers that resemble native human intestine. Although the endpoint of HIO engraftment has been well described, here we aim to elucidate the developmental stages of HIO engraftment and establish whether it parallels fetal human intestinal development. We analyzed a time course of transplanted HIOs histologically at 2, 4, 6 and 8 weeks post-transplantation, and demonstrated that HIO maturation closely resembles key stages of fetal human intestinal development. We also utilized single-nuclear RNA sequencing to determine and track the emergence of distinct cell populations over time, and validated our transcriptomic data through in situ protein expression. These observations suggest that transplanted HIOs do indeed recapitulate early intestinal development, solidifying their value as a human intestinal model system.

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Project description:Human Intestinal Organoids (HIOs) generated from embryonic and/or induced pluripotent stem cell lines offer an avenue to study both developmental and human specific disease states. Recently, progress has been made in scaling and maturing these inherently immature tissues through transplanting them in vivo. However, these resultant grafts best approximate fetal intestinal tissue thus limiting their utility. To induce growth and maturation of HIOs we used a nitinol spring device to mechanically induce enterogenesis of HIO in vivo. HIOs are cultured prior to implantation within the mesentery of immunodeficient mice. They are allowed to grow, vascularize, and mature before a second procedure is performed wherein a compressed nitinol spring is implanted within the lumen of the transplanted HIO (tHIO). Next Generation RNA sequencing was performed across transplanted samples as well as on human surgical samples to highlight the transcriptional similarities and differences between groups. Transcriptionally, the tHIO+S samples were more similar to human tissues than the tHIO. With these initial experiments, we concluded that the application of an intraluminal uniaxial force is a practical method to induce maturation of tHIOs in vivo without concomitant architectural disruptions. While our current system does lack certain complexities, we have demonstrated enterogenesis by means of mechanical manipulation.

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