Characterized by continual turnover, the intestine provides an elegant system for the study of adult stem cells - - cells which self-renew and regenerate and, thus, hold great promise for regenerative medicine. Studies have provided important insight regarding the capacity of intestinal stem cells (ISCs) for self-repair or healing as well as ongoing maintenance and differentiation into all the various intestinal cell types. However, considerable research is needed to better understand the different states and functions of subpopulations of ISCs and how these are regulated. In other tissues, such as hair and blood, the quiescent stem cell subpopulation is known to be critical, especially for long-term maintenance of the stem cell pool and for regeneration in response to stress or injury. However, in intestine, it is a matter of debate whether bona fide quiescent ISCs exist and/or where they reside. This research proposes that bona fide quiescent ISCs coexist with active ISCs. The active subpopulation accounts for generation and regeneration of intestinal epithelial lineages, and the quiescent subpopulation functions as a 'reserve' pool to replenish lost active ISCs and damaged tissues. The goal of this research is to further investigate +4 quiescent ISCs, in particular, and to determine potential molecular regulation of quiescent and active ISC subpopulations. Methods to be used will include: surface markers and in vitro culture and in vivo lineage tracing assays to identify and characterize quiescent ISCs under stable and stressed conditions; RNA sequencing to determine how and where certain factors (Frizzled5 and/or 7) mediate signaling (noncanonical and/or canonical Wnt) that govern ISC maintenance, activation, self- renewal and location; and genetic mouse models to study the effect of protein inactivation on quiescent and active ISCs. Understanding signaling regulation of the state and fate of quiescent and active ISCs can uncover potential therapeutic targets for treating intestinal disorders, including cancer. If this goal can be achieved, it will open avenues not only for advancing the study of ISC behavior, but also for treating intestinal disorders in which ISC-driven tissue regeneration is essential and for screening drugs to target cancer stem cells. The ability to identify and isolate and characterize ISCs is critical for therapeutic advancements, especially tissue replacement, and for enhanced understanding of the development, prevention, and cure of intestinal disease.

Public Health Relevance

More than 70 million Americans are affected by a wide range of digestive diseases at an astronomical cost that exceeds $142 billion. Evidence indicates intestinal stem cells (ISCs) are involved in many of these diseases -- from Crohn's to colitis to cancer. This research will increase knowledge of ISC biology, which can be applied to enhance treatment efficacies, improve patient outcomes, and ultimately, reduce the public health burden of digestive diseases.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project--Cooperative Agreements (U01)
Project #
3U01DK085507-07S1
Application #
9135719
Study Section
Special Emphasis Panel (ZDK1-GRB-8 (M3))
Program Officer
Carrington, Jill L
Project Start
2009-09-30
Project End
2019-08-31
Budget Start
2015-09-01
Budget End
2016-08-31
Support Year
7
Fiscal Year
2015
Total Cost
$57,882
Indirect Cost
$22,802
Name
Stowers Institute for Medical Research
Department
Type
DUNS #
614653652
City
Kansas City
State
MO
Country
United States
Zip Code
64110
Goretsky, Tatiana; Bradford, Emily M; Ye, Qing et al. (2018) Beta-catenin cleavage enhances transcriptional activation. Sci Rep 8:671
Yan, Kelley S; Gevaert, Olivier; Zheng, Grace X Y et al. (2017) Intestinal Enteroendocrine Lineage Cells Possess Homeostatic and Injury-Inducible Stem Cell Activity. Cell Stem Cell 21:78-90.e6
Yousefi, Maryam; Li, Linheng; Lengner, Christopher J (2017) Hierarchy and Plasticity in the Intestinal Stem Cell Compartment. Trends Cell Biol 27:753-764
Sailaja, Badi Sri; He, Xi C; Li, Linheng (2016) The regulatory niche of intestinal stem cells. J Physiol 594:4827-36
Wang, Xinwei; Wei, Liang; Cramer, Julie M et al. (2015) Pharmacologically blocking p53-dependent apoptosis protects intestinal stem cells and mice from radiation. Sci Rep 5:8566
Gracz, Adam D; Williamson, Ian A; Roche, Kyle C et al. (2015) A high-throughput platform for stem cell niche co-cultures and downstream gene expression analysis. Nat Cell Biol 17:340-9
Qu, Dongfeng; May, Randal; Sureban, Sripathi M et al. (2014) Inhibition of Notch signaling reduces the number of surviving Dclk1+ reserve crypt epithelial stem cells following radiation injury. Am J Physiol Gastrointest Liver Physiol 306:G404-11
Lei, Nan Ye; Jabaji, Ziyad; Wang, Jiafang et al. (2014) Intestinal subepithelial myofibroblasts support the growth of intestinal epithelial stem cells. PLoS One 9:e84651
Wang, Fengchao; Scoville, David; He, Xi C et al. (2013) Isolation and characterization of intestinal stem cells based on surface marker combinations and colony-formation assay. Gastroenterology 145:383-95.e1-21
Magness, Scott T; Puthoff, Brent J; Crissey, Mary Ann et al. (2013) A multicenter study to standardize reporting and analyses of fluorescence-activated cell-sorted murine intestinal epithelial cells. Am J Physiol Gastrointest Liver Physiol 305:G542-51

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