PMID- 23152448 OWN - NLM STAT- MEDLINE DCOM- 20130125 LR - 20240109 IS - 1549-5477 (Electronic) IS - 0890-9369 (Print) IS - 0890-9369 (Linking) VI - 26 IP - 23 DP - 2012 Dec 1 TI - Pediatric glioma-associated KIAA1549:BRAF expression regulates neuroglial cell growth in a cell type-specific and mTOR-dependent manner. PG - 2561-6 LID - 10.1101/gad.200907.112 [doi] AB - Tandem duplications involving the BRAF kinase gene have recently been identified as the most frequent genetic alteration in sporadic pediatric glioma, creating a novel fusion protein (f-BRAF) with increased BRAF activity. To define the role of f-BRAF in gliomagenesis, we demonstrate that f-BRAF regulates neural stem cell (NSC), but not astrocyte, proliferation and is sufficient to induce glioma-like lesions in mice. Moreover, f-BRAF-driven NSC proliferation results from tuberin/Rheb-mediated mammalian target of rapamycin (mTOR) hyperactivation, leading to S6-kinase-dependent degradation of p27. Collectively, these results establish mTOR pathway activation as a key growth regulatory mechanism common to both sporadic and familial low-grade gliomas in children. FAU - Kaul, Aparna AU - Kaul A AD - Department of Neurology, Washington University School of Medicine, St. Louis, MO 63108, USA. FAU - Chen, Yi-Hsien AU - Chen YH FAU - Emnett, Ryan J AU - Emnett RJ FAU - Dahiya, Sonika AU - Dahiya S FAU - Gutmann, David H AU - Gutmann DH LA - eng GR - R01 NS065547/NS/NINDS NIH HHS/United States GR - NS065547/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20121114 PL - United States TA - Genes Dev JT - Genes & development JID - 8711660 RN - 0 (Neuropeptides) RN - 0 (Ras Homolog Enriched in Brain Protein) RN - 0 (Rheb protein, mouse) RN - 0 (TSC2 protein, human) RN - 0 (Tuberous Sclerosis Complex 2 Protein) RN - 0 (Tumor Suppressor Proteins) RN - EC 2.7.11.1 (Proto-Oncogene Proteins B-raf) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases, 70-kDa) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.1 (ribosomal protein S6 kinase, 70kD, polypeptide 1) RN - EC 3.6.5.2 (Monomeric GTP-Binding Proteins) SB - IM MH - Animals MH - Astrocytoma/pathology/physiopathology MH - Cell Proliferation MH - Cells, Cultured MH - Child MH - *Gene Expression Regulation, Neoplastic MH - Glioma/*pathology/physiopathology MH - Humans MH - Mice MH - Mice, Inbred C57BL MH - Monomeric GTP-Binding Proteins/metabolism MH - Neuroglia/*cytology/metabolism MH - Neuropeptides/metabolism MH - Phosphorylation MH - Proto-Oncogene Proteins B-raf/genetics/metabolism MH - Ras Homolog Enriched in Brain Protein MH - Ribosomal Protein S6 Kinases, 70-kDa/genetics MH - TOR Serine-Threonine Kinases/*metabolism MH - Tuberous Sclerosis Complex 2 Protein MH - Tumor Suppressor Proteins/metabolism PMC - PMC3521628 EDAT- 2012/11/16 06:00 MHDA- 2013/01/26 06:00 PMCR- 2013/06/01 CRDT- 2012/11/16 06:00 PHST- 2012/11/16 06:00 [entrez] PHST- 2012/11/16 06:00 [pubmed] PHST- 2013/01/26 06:00 [medline] PHST- 2013/06/01 00:00 [pmc-release] AID - gad.200907.112 [pii] AID - 10.1101/gad.200907.112 [doi] PST - ppublish SO - Genes Dev. 2012 Dec 1;26(23):2561-6. doi: 10.1101/gad.200907.112. Epub 2012 Nov 14.