Enhancing a Wnt-Telomere Feedback Loop Restores Intestinal Stem Cell Function in a Human Organotypic Model of Dyskeratosis Congenita
| Autor: | F. Brad Johnson, Qijun Chen, Christopher J. Lengner, Carla Hoge, M. Rebecca Glineburg, Ting-Lin B. Yang, Dong Hun Woo, Nicolae Adrian Leu |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Biology Lithium Models Biological Dyskeratosis Congenita Article 03 medical and health sciences Mice Directed differentiation Genetics medicine Animals Humans Telomeric Repeat Binding Protein 2 Induced pluripotent stem cell Wnt Signaling Pathway Feedback Physiological Base Sequence Stem Cells Wnt signaling pathway Cell Differentiation Cell Biology Telomere medicine.disease Intestinal epithelium Cell biology Intestines Organoids Haematopoiesis 030104 developmental biology HEK293 Cells Phenotype Immunology Molecular Medicine Stem cell Dyskeratosis congenita |
| Zdroj: | Cell Stem Cell |
| ISSN: | 1875-9777 |
| Popis: | Summary Patients with dyskeratosis congenita (DC) suffer from stem cell failure in highly proliferative tissues, including the intestinal epithelium. Few therapeutic options exist for this disorder, and patients are treated primarily with bone marrow transplantation to restore hematopoietic function. Here, we generate isogenic DC patient and disease allele-corrected intestinal tissue using clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9-mediated gene correction in induced pluripotent stem cells and directed differentiation. We show that DC tissue has suboptimal Wnt pathway activity causing intestinal stem cell failure and that enhanced expression of the telomere-capping protein TRF2, a Wnt target gene, can alleviate DC phenotypes. Treatment with the clinically relevant Wnt agonists LiCl or CHIR99021 restored TRF2 expression and reversed gastrointestinal DC phenotypes, including organoid formation in vitro, and maturation of intestinal tissue and xenografted organoids in vivo. Thus, the isogenic DC cell model provides a platform for therapeutic discovery and identifies Wnt modulation as a potential strategy for treatment of DC patients. |
| Databáze: | OpenAIRE |
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