PMID- 21252048 OWN - NLM STAT- MEDLINE DCOM- 20110628 LR - 20211020 IS - 1522-1547 (Electronic) IS - 0193-1857 (Print) IS - 0193-1857 (Linking) VI - 300 IP - 5 DP - 2011 May TI - Intestinal myofibroblasts: targets for stem cell therapy. PG - G684-96 LID - 10.1152/ajpgi.00474.2010 [doi] AB - The subepithelial intestinal myofibroblast is an important cell orchestrating many diverse functions in the intestine and is involved in growth and repair, tumorigenesis, inflammation, and fibrosis. The myofibroblast is but one of several alpha-smooth muscle actin-positive (alpha-SMA(+)) mesenchymal cells present within the intestinal lamina propria, including vascular pericytes, bone marrow-derived stem cells (mesenchymal stem cells or hematopoietic stem cells), muscularis mucosae, and the lymphatic pericytes (colon) and organized smooth muscle (small intestine) associated with the lymphatic lacteals. These other mesenchymal cells perform many of the functions previously attributed to subepithelial myofibroblasts. This review discusses the definition of a myofibroblast and reconsiders whether the alpha-SMA(+) subepithelial cells in the intestine are myofibroblasts or other types of mesenchymal cells, i.e., pericytes. Current information about specific, or not so specific, molecular markers of lamina propria mesenchymal cells is reviewed, as well as the origins of intestinal myofibroblasts and pericytes in the intestinal lamina propria and their replenishment after injury. Current concepts and research on stem cell therapy for intestinal inflammation are summarized. Information about the stem cell origin of intestinal stromal cells may inform future stem cell therapies to treat human inflammatory bowel disease (IBD). FAU - Mifflin, R C AU - Mifflin RC AD - Depts. of Internal Medicine, University of Texas Medical Branch, Galveston, USA. FAU - Pinchuk, I V AU - Pinchuk IV FAU - Saada, J I AU - Saada JI FAU - Powell, D W AU - Powell DW LA - eng GR - CA-127229/CA/NCI NIH HHS/United States GR - DK-55783/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20110120 PL - United States TA - Am J Physiol Gastrointest Liver Physiol JT - American journal of physiology. Gastrointestinal and liver physiology JID - 100901227 RN - 0 (ACTA2 protein, human) RN - 0 (Actins) SB - IM MH - Actins/metabolism MH - Animals MH - Humans MH - Intestines/cytology MH - Myofibroblasts/*physiology MH - Pericytes/physiology MH - *Stem Cell Transplantation MH - Stromal Cells/physiology PMC - PMC3094146 EDAT- 2011/01/22 06:00 MHDA- 2011/06/29 06:00 PMCR- 2012/05/01 CRDT- 2011/01/22 06:00 PHST- 2011/01/22 06:00 [entrez] PHST- 2011/01/22 06:00 [pubmed] PHST- 2011/06/29 06:00 [medline] PHST- 2012/05/01 00:00 [pmc-release] AID - ajpgi.00474.2010 [pii] AID - GI-00474-2010 [pii] AID - 10.1152/ajpgi.00474.2010 [doi] PST - ppublish SO - Am J Physiol Gastrointest Liver Physiol. 2011 May;300(5):G684-96. doi: 10.1152/ajpgi.00474.2010. Epub 2011 Jan 20.