{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T07:31:54Z","timestamp":1791271914540,"version":"4.1.0"},"reference-count":26,"publisher":"National Academy of Sciences","issue":"49","content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2008,12,9]]},"abstract":"<jats:p>\n                    The Tuberous Sclerosis Complex component, TSC1, functions as a tumor suppressor via its regulation of diverse cellular processes, particularly cell growth. TSC1 exists in a complex with TSC2 and functions primarily as a key negative regulator of mammalian target of rapamycin complex 1 (mTORC1) signaling and protein synthesis, although the TSC1\/TSC2 complex also shows mTORC1-independent outputs to other pathways. Here, we explored the role of TSC1 in various aspects of stem cell biology and dissected the extent to which TSC1 functions are executed via mTORC1-dependent versus mTORC1-independent pathways. Using hematopoietic stem cells (HSCs) as a model system, we demonstrate that somatic deletion of\n                    <jats:italic>TSC1<\/jats:italic>\n                    produces striking stem cell and derivative effector cell phenotypes characterized by increased HSC cell cycling, mobilization, marked progressive depletion, defective long-term repopulating potential, and hematopoietic lineage developmental aberrations. On the mechanistic level, we further establish that TSC1 regulation of HSC quiescence and long-term repopulating potential and hematopoietic lineage development is mediated through mTORC1 signaling. In contrast, TSC1 regulation of HSC mobilization is effected in an mTORC1-independent manner, and gene profiling and functional analyses reveals the actin-bundling protein FSCN1 as a key TSC1\/TSC2 target in the regulation of HSC mobilization. Thus, TSC1 is a critical regulator of HSC self-renewal, mobilization, and multilineage development and executes these actions via both mTORC1-dependent and -independent pathways.\n                  <\/jats:p>","DOI":"10.1073\/pnas.0810584105","type":"journal-article","created":{"date-parts":[[2008,12,3]],"date-time":"2008-12-03T21:33:12Z","timestamp":1228339992000},"page":"19384-19389","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":185,"title":["mTORC1-dependent and -independent regulation of stem cell renewal, differentiation, and mobilization"],"prefix":"10.1073","volume":"105","author":[{"given":"Boyi","family":"Gan","sequence":"first","affiliation":[{"name":"Department of Medical Oncology, and"},{"name":"Departments of bMedicine and Genetics and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erg\u00fcn","family":"Sahin","sequence":"additional","affiliation":[{"name":"Department of Medical Oncology, and"},{"name":"Departments of bMedicine and Genetics and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shan","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Medical Oncology, and"},{"name":"Departments of bMedicine and Genetics and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abel","family":"Sanchez-Aguilera","sequence":"additional","affiliation":[{"name":"Division of Hematology\/Oncology, Children's Hospital, 300 Longwood Avenue, Boston, MA 02115"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenneth L.","family":"Scott","sequence":"additional","affiliation":[{"name":"Department of Medical Oncology, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lynda","family":"Chin","sequence":"additional","affiliation":[{"name":"Department of Medical Oncology, and"},{"name":"Center for Applied Cancer Science, Belfer Foundation Institute for Innovative Cancer Science, Dana\u2013Farber Cancer Institute, Boston, MA 02115;"},{"name":"Dermatology, Harvard Medical School, Boston, MA 02115;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David A.","family":"Williams","sequence":"additional","affiliation":[{"name":"Division of Hematology\/Oncology, Children's Hospital, 300 Longwood Avenue, Boston, MA 02115"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David J.","family":"Kwiatkowski","sequence":"additional","affiliation":[{"name":"Departments of bMedicine and Genetics and"},{"name":"Division of Translational Medicine, Brigham and Women's Hospital, Boston, MA 02115; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ronald A.","family":"DePinho","sequence":"additional","affiliation":[{"name":"Department of Medical Oncology, and"},{"name":"Center for Applied Cancer Science, Belfer Foundation Institute for Innovative Cancer Science, Dana\u2013Farber Cancer Institute, Boston, MA 02115;"},{"name":"Departments of bMedicine and Genetics and"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2008,12,9]]},"reference":[{"key":"e_1_3_3_1_2","doi-asserted-by":"publisher","DOI":"10.1093\/hmg\/ddi260"},{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1042\/BJ20080281"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0092-8674(00)80563-2"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cell.2006.01.016"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1038\/35010550"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1074\/jbc.M402591200"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1074\/jbc.C200473200"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1128\/MCB.00289-08"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cell.2008.01.025"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1038\/nrg2269"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1093\/hmg\/11.5.525"},{"key":"e_1_3_3_12_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.151033798"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.1093\/embo-reports\/kve064"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1097-2765(01)00226-X"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.273.5272.242"},{"key":"e_1_3_3_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cell.2005.02.013"},{"key":"e_1_3_3_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cell.2008.01.041"},{"key":"e_1_3_3_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.biocel.2005.05.004"},{"key":"e_1_3_3_19_2","doi-asserted-by":"publisher","DOI":"10.1158\/0008-5472.CAN-07-0929"},{"key":"e_1_3_3_20_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature04747"},{"key":"e_1_3_3_21_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature04703"},{"key":"e_1_3_3_22_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature05886"},{"key":"e_1_3_3_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cell.2007.01.003"},{"key":"e_1_3_3_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.stem.2007.02.001"},{"key":"e_1_3_3_25_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature02994"},{"key":"e_1_3_3_26_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cell.2006.12.029"}],"container-title":["Proceedings of the National Academy of Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pnas.org\/doi\/pdf\/10.1073\/pnas.0810584105","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,4,12]],"date-time":"2022-04-12T17:41:06Z","timestamp":1649785266000},"score":1,"resource":{"primary":{"URL":"https:\/\/pnas.org\/doi\/full\/10.1073\/pnas.0810584105"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,12,9]]},"references-count":26,"journal-issue":{"issue":"49","published-print":{"date-parts":[[2008,12,9]]}},"alternative-id":["10.1073\/pnas.0810584105"],"URL":"https:\/\/doi.org\/10.1073\/pnas.0810584105","relation":{},"ISSN":["0027-8424","1091-6490"],"issn-type":[{"value":"0027-8424","type":"print"},{"value":"1091-6490","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,12,9]]},"assertion":[{"value":"2008-10-06","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2008-12-09","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}