PMID- 22644962 OWN - NLM STAT- MEDLINE DCOM- 20130124 LR - 20151119 IS - 1939-005X (Electronic) IS - 1939-005X (Linking) VI - 4 IP - 5 DP - 2012 Sep-Oct TI - Gut stem cells in tissue renewal and disease: methods, markers, and myths. PG - 475-96 LID - 10.1002/wsbm.1176 [doi] AB - Homeostasis in adult tissue is maintained by the activity of a minor population of long-lived resident stem cells. These adult stem cells are defined by two essential attributes, self-renewal and multipotency, and their physiological activity is regulated by a specialized microenvironment, the stem cell niche. These adult stem cells are generally considered to divide infrequently, and cell expansion is mainly achieved through the rapid proliferation of transit amplifying progenitors before they undergo terminal differentiation. Organs that operate in abrasive environments, such as the mucosa of the skin, intestine, and stomach, display a higher tissue turnover rate, which consequently places them at higher risk of developing cancer. Indeed, colorectal cancer (CRC) is one of the most frequent cancers worldwide, with over a million new cases every year. Our understanding of stem cell function in tissue homeostasis and their potential role in cancer development has been greatly hampered by the lack of reliable specific biomarkers, but recent discoveries of membrane bound biomarkers promise great progress in the field. Here we review the current advances toward identifying the stem cells of the gastrointestinal tract and in understanding their microenvironmental regulation, and also discuss their implications for human cancer. CI - Copyright (c) 2012 Wiley Periodicals, Inc. FAU - Rizk, Pamela AU - Rizk P AD - Institute of Medical Biology, A-STAR, Singapore. FAU - Barker, Nick AU - Barker N LA - eng PT - Journal Article PT - Review DEP - 20120529 PL - United States TA - Wiley Interdiscip Rev Syst Biol Med JT - Wiley interdisciplinary reviews. Systems biology and medicine JID - 101516550 RN - 0 (Biomarkers) SB - IM MH - Animals MH - Animals, Genetically Modified MH - Biomarkers/metabolism MH - Humans MH - Intestinal Mucosa/*cytology MH - Models, Biological MH - Neoplastic Stem Cells/metabolism MH - Stem Cell Niche MH - Stem Cells/cytology/*metabolism EDAT- 2012/05/31 06:00 MHDA- 2013/01/25 06:00 CRDT- 2012/05/31 06:00 PHST- 2012/05/31 06:00 [entrez] PHST- 2012/05/31 06:00 [pubmed] PHST- 2013/01/25 06:00 [medline] AID - 10.1002/wsbm.1176 [doi] PST - ppublish SO - Wiley Interdiscip Rev Syst Biol Med. 2012 Sep-Oct;4(5):475-96. doi: 10.1002/wsbm.1176. Epub 2012 May 29.