TY  - JOUR
AU  - Kordes, M.
AU  - Röring, M.
AU  - Heining, C.
AU  - Braun, S.
AU  - Hutter, B.
AU  - Richter, D.
AU  - Geörg, C.
AU  - Scholl, C.
AU  - Gröschel, S.
AU  - Roth, W.
AU  - Rosenwald, A.
AU  - Geissinger, E.
AU  - von Kalle, C.
AU  - Jäger, D.
AU  - Brors, B.
AU  - Weichert, W.
AU  - Grüllich, C.
AU  - Glimm, H.
AU  - Brummer, T.
AU  - Fröhling, Stefan
TI  - Cooperation of BRAF(F595L) and mutant HRAS in histiocytic sarcoma provides new insights into oncogenic BRAF signaling.
JO  - Leukemia
VL  - 30
IS  - 4
SN  - 1476-5551
CY  - Basingstoke
PB  - Nature Publ. Group
M1  - DKFZ-2017-04957
SP  - 937 - 946
PY  - 2016
AB  - Activating BRAF mutations, in particular V600E/K, drive many cancers and are considered mutually exclusive with mutant RAS, whereas inactivating BRAF mutations in the D(594)F(595)G(596) motif cooperate with RAS via paradoxical MEK/ERK activation. Due to the increasing use of comprehensive tumor genomic profiling, many non-V600 BRAF mutations are being detected whose functional consequences and therapeutic actionability are often unknown. We investigated an atypical BRAF mutation, F595L, which was identified along with mutant HRAS in histiocytic sarcoma and also occurs in epithelial cancers, melanoma and neuroblastoma, and determined its interaction with mutant RAS. Unlike other DFG motif mutants, BRAF(F595L) is a gain-of-function variant with intermediate activity that does not act paradoxically, but nevertheless cooperates with mutant RAS to promote oncogenic signaling, which is efficiently blocked by pan-RAF and MEK inhibitors. Mutation data from patients and cell lines show that BRAF(F595L), as well as other intermediate-activity BRAF mutations, frequently coincide with mutant RAS in various cancers. These data define a distinct class of activating BRAF mutations, extend the spectrum of patients with systemic histiocytoses and other malignancies who are candidates for therapeutic blockade of the RAF-MEK-ERK pathway and underscore the value of comprehensive genomic testing for uncovering the vulnerabilities of individual tumors.
KW  - Biomarkers, Tumor (NLM Chemicals)
KW  - BRAF protein, human (NLM Chemicals)
KW  - Proto-Oncogene Proteins B-raf (NLM Chemicals)
KW  - HRAS protein, human (NLM Chemicals)
KW  - Proto-Oncogene Proteins p21(ras) (NLM Chemicals)
LB  - PUB:(DE-HGF)16
C6  - pmid:26582644
DO  - DOI:10.1038/leu.2015.319
UR  - https://inrepo02.dkfz.de/record/128945
ER  -