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Blood, 1 July 2005, Vol. 106, No. 1, pp. 328-337. Prepublished online as a Blood First Edition Paper on March 22, 2005; DOI 10.1182/blood-2004-09-3686. This Article Full Text Full Text (PDF) All Versions of this Article: 2004-09-3686v1 106/1/328    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Chen, J. Articles by Gilliland, D. G. Search for Related Content PubMed PubMed Citation Articles by Chen, J. Articles by Gilliland, D. G. Related Collections Neoplasia Oncogenes and Tumor Suppressors Signal Transduction Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  NEOPLASIA Constitutively activated FGFR3 mutants signal through PLC-dependent and -independent pathways for hematopoietic transformation Jing Chen, Ifor R. Williams, Benjamin H. Lee, Nicole Duclos, Brian J. P. Huntly, Daniel J. Donoghue, and D. Gary Gilliland From the Howard Hughes Medical Institute, Harvard Medical School, and Department of Pathology, Brigham and Women's Hospital, Boston, MA; the Department of Pathology, Emory University, Atlanta, GA; and the Department of Chemistry and Biochemistry, University of California–San Diego, La Jolla, CA. Ectopic expression of fibroblast growth factor receptor 3 (FGFR3) associated with t(4;14) has been implicated in the pathogenesis of human multiple myeloma. Some t(4;14) patients have activating mutations of FGFR3, of which a minority are K650E (thanatophoric dysplasia type II [TDII]). To investigate the role of autophosphorylated tyrosine residues in FGFR3 signal transduction and transformation, we characterized a series of FGFR3 TDII mutants with single or multiple YF substitutions. Phenylalanine substitution of Y760, essential for phospholipase C (PLC) binding and activation, significantly attenuated FGFR3 TDII–mediated PLC activation, as well as transformation in Ba/F3 cells and a murine bone marrow transplant leukemia model. In contrast, single substitution of Y577, Y724, or Y770 had minimal to moderate effects on TDII-dependent transformation. Substitution of all 4 non–activation loop tyrosine residues significantly attenuated, but did not abolish, TDII transforming activity. Similar observations were obtained in the context of a constitutively activated fusion TEL-FGFR3 associated with t(4;12)(p16;p13) peripheral T-cell lymphomas. Moreover, 2 independent EµSR-FGFR3 TDII transgenic mouse lines developed a pro-B-cell lymphoma, and PLC was highly activated in primary lymphoma cells as assessed by tyrosine phosphorylation. These data indicate that engagement of multiple signaling pathways, including PLC-dependent and PLC-independent pathways, is required for full hematopoietic transformation by constitutively activated FGFR3 mutants. CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: L. Salazar, T. Kashiwada, P. Krejci, P. Muchowski, D. Donoghue, W. R. Wilcox, and L. M. Thompson A novel interaction between fibroblast growth factor receptor 3 and the p85 subunit of phosphoinositide 3-kinase: activation-dependent regulation of ERK by p85 in multiple myeloma cells Hum. Mol. Genet., June 1, 2009; 18(11): 1951 - 1961. [Abstract] [Full Text] [PDF] J. Y. Cha, S. Maddileti, N. Mitin, T. K. Harden, and C. J. Der Aberrant Receptor Internalization and Enhanced FRS2-dependent Signaling Contribute to the Transforming Activity of the Fibroblast Growth Factor Receptor 2 IIIb C3 Isoform J. Biol. Chem., March 6, 2009; 284(10): 6227 - 6240. [Abstract] [Full Text] [PDF] M. M. Loriaux, R. L. Levine, J. W. Tyner, S. Frohling, C. Scholl, E. P. Stoffregen, G. Wernig, H. Erickson, C. A. Eide, R. Berger, et al. High-throughput sequence analysis of the tyrosine kinome in acute myeloid leukemia Blood, May 1, 2008; 111(9): 4788 - 4796. [Abstract] [Full Text] [PDF] S. Dong, S. Kang, T.-L. Gu, S. Kardar, H. Fu, S. Lonial, H. J. Khoury, F. Khuri, and J. Chen 14-3-3 integrates prosurvival signals mediated by the AKT and MAPK pathways in ZNF198-FGFR1-transformed hematopoietic cells Blood, July 1, 2007; 110(1): 360 - 369. [Abstract] [Full Text] [PDF] J. L. Rocnik, R. Okabe, J.-C. Yu, B. H. Lee, N. Giese, D. P. Schenkein, and D. G. Gilliland Roles of tyrosine 589 and 591 in STAT5 activation and transformation mediated by FLT3-ITD Blood, August 15, 2006; 108(4): 1339 - 1345. [Abstract] [Full Text] [PDF]

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