Methods and systems for converting precursor cells into intestinal tissues through directed differentiation
First Claim
1. An in vitro method of inducing formation of mammalian intestinal tissue, comprising the steps of:
- a) contacting mammalian definitive endoderm cells with 100 ng/ml of FGF4 or higher and 100 ng/ml or higher Wnt3a for at least 96 hours to obtain posterior definitive endoderm cells,b) culturing the posterior definitive endoderm cells of step (a) to obtain 3-dimensional spheroids,c) embedding the 3-dimensional spheroids of step (b) in a basement membrane-like matrix to obtain intestinal tissue; and
d) maintaining said embedded intestinal tissue in a media comprising at least 50 ng/mL of EGF, wherein said maintaining produces a stable mammalian intestinal tissue.
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Abstract
The generation of complex organ tissues from human embryonic and pluripotent stem cells (PSCs) remains a major challenge for translational studies. It is shown that PSCs can be directed to differentiate into intestinal tissue in vitro by modulating the combinatorial activities of several signaling pathways in a step-wise fashion, effectively recapitulating in vivo fetal intestinal development. The resulting intestinal “organoids” were three-dimensional structures consisting of a polarized, columnar epithelium surrounded by mesenchyme that included a smooth muscle-like layer. The epithelium was patterned into crypt-like SOX9-positive proliferative zones and villus-like structures with all of the major functional cell types of the intestine. The culture system is used to demonstrate that expression of NEUROG3, a pro-endocrine transcription factor mutated in enteric anendocrinosis is sufficient to promote differentiation towards the enteroendocrine cell lineage. In conclusion, PSC-derived human intestinal tissue should allow for unprecedented studies of human intestinal development, homeostasis and disease.
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Citations
9 Claims
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1. An in vitro method of inducing formation of mammalian intestinal tissue, comprising the steps of:
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a) contacting mammalian definitive endoderm cells with 100 ng/ml of FGF4 or higher and 100 ng/ml or higher Wnt3a for at least 96 hours to obtain posterior definitive endoderm cells, b) culturing the posterior definitive endoderm cells of step (a) to obtain 3-dimensional spheroids, c) embedding the 3-dimensional spheroids of step (b) in a basement membrane-like matrix to obtain intestinal tissue; and d) maintaining said embedded intestinal tissue in a media comprising at least 50 ng/mL of EGF, wherein said maintaining produces a stable mammalian intestinal tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification