PMID- 20019247 OWN - NLM STAT- MEDLINE DCOM- 20100217 LR - 20220318 IS - 1095-9203 (Electronic) IS - 0036-8075 (Print) IS - 0036-8075 (Linking) VI - 327 IP - 5965 DP - 2010 Jan 29 TI - p53 controls radiation-induced gastrointestinal syndrome in mice independent of apoptosis. PG - 593-6 LID - 10.1126/science.1166202 [doi] AB - Acute exposure to ionizing radiation can cause lethal damage to the gastrointestinal (GI) tract, a condition called the GI syndrome. Whether the target cells affected by radiation to cause the GI syndrome are derived from the epithelium or endothelium and whether the target cells die by apoptosis or other mechanisms are controversial issues. Studying mouse models, we found that selective deletion of the proapoptotic genes Bak1 and Bax from the GI epithelium or from endothelial cells did not protect mice from developing the GI syndrome after sub-total-body gamma irradiation. In contrast, selective deletion of p53 from the GI epithelium, but not from endothelial cells, sensitized irradiated mice to the GI syndrome. Transgenic mice overexpressing p53 in all tissues were protected from the GI syndrome after irradiation. These results suggest that the GI syndrome is caused by the death of GI epithelial cells and that these epithelial cells die by a mechanism that is regulated by p53 but independent of apoptosis. FAU - Kirsch, David G AU - Kirsch DG AD - David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. FAU - Santiago, Philip M AU - Santiago PM FAU - di Tomaso, Emmanuelle AU - di Tomaso E FAU - Sullivan, Julie M AU - Sullivan JM FAU - Hou, Wu-Shiun AU - Hou WS FAU - Dayton, Talya AU - Dayton T FAU - Jeffords, Laura B AU - Jeffords LB FAU - Sodha, Pooja AU - Sodha P FAU - Mercer, Kim L AU - Mercer KL FAU - Cohen, Rhianna AU - Cohen R FAU - Takeuchi, Osamu AU - Takeuchi O FAU - Korsmeyer, Stanley J AU - Korsmeyer SJ FAU - Bronson, Roderick T AU - Bronson RT FAU - Kim, Carla F AU - Kim CF FAU - Haigis, Kevin M AU - Haigis KM FAU - Jain, Rakesh K AU - Jain RK FAU - Jacks, Tyler AU - Jacks T LA - eng GR - K08 CA114176/CA/NCI NIH HHS/United States GR - RC1-AI078521/AI/NIAID NIH HHS/United States GR - RC1 AI078521-01/AI/NIAID NIH HHS/United States GR - U19-AI06775/AI/NIAID NIH HHS/United States GR - P30 CA014051/CA/NCI NIH HHS/United States GR - P30-CA14051/CA/NCI NIH HHS/United States GR - P01 CA080124/CA/NCI NIH HHS/United States GR - P01 CA80124/CA/NCI NIH HHS/United States GR - P01 CA080124-01A1/CA/NCI NIH HHS/United States GR - P30 CA014051-38/CA/NCI NIH HHS/United States GR - HHMI/Howard Hughes Medical Institute/United States GR - K08 CA 114176/CA/NCI NIH HHS/United States GR - K08 CA114176-05/CA/NCI NIH HHS/United States GR - RC1 AI078521/AI/NIAID NIH HHS/United States GR - P30 DK043351/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20091217 PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 0 (Bak1 protein, mouse) RN - 0 (Bax protein, mouse) RN - 0 (Tumor Suppressor Protein p53) RN - 0 (bcl-2 Homologous Antagonist-Killer Protein) RN - 0 (bcl-2-Associated X Protein) SB - IM EIN - Science. 2011 Nov 11;334(6057):761 MH - Animals MH - *Apoptosis MH - Cell Death MH - Epithelial Cells/cytology/physiology/radiation effects MH - Gamma Rays/*adverse effects MH - Gene Deletion MH - Genes, p53 MH - Intestinal Diseases/etiology/pathology/*physiopathology MH - Intestinal Mucosa/pathology/physiopathology/*radiation effects MH - Intestine, Small/pathology/physiopathology/*radiation effects MH - Mesoderm/cytology MH - Mice MH - Mice, Transgenic MH - Models, Biological MH - Radiation Dosage MH - Radiation Injuries/etiology/pathology/*physiopathology MH - Tumor Suppressor Protein p53/*physiology MH - bcl-2 Homologous Antagonist-Killer Protein/genetics/metabolism MH - bcl-2-Associated X Protein/genetics/metabolism PMC - PMC2897160 MID - NIHMS178596 EDAT- 2009/12/19 06:00 MHDA- 2010/02/18 06:00 PMCR- 2010/07/29 CRDT- 2009/12/19 06:00 PHST- 2009/12/19 06:00 [entrez] PHST- 2009/12/19 06:00 [pubmed] PHST- 2010/02/18 06:00 [medline] PHST- 2010/07/29 00:00 [pmc-release] AID - science.1166202 [pii] AID - 10.1126/science.1166202 [doi] PST - ppublish SO - Science. 2010 Jan 29;327(5965):593-6. doi: 10.1126/science.1166202. Epub 2009 Dec 17.