Abstract:
:Uveal melanoma (UM) is characterized by mutually exclusive activating mutations in GNAQ, GNA11, CYSLTR2, and PLCB4, four genes in a linear pathway to activation of PLCβ in almost all tumors and loss of BAP1 in the aggressive subset. We generated mice with melanocyte-specific expression of GNA11Q209L with and without homozygous Bap1 loss. The GNA11Q209L mice recapitulated human Gq-associated melanomas, and they developed pigmented neoplastic lesions from melanocytes of the skin and non-cutaneous organs, including the eye and leptomeninges, as well as at atypical sites, including the lymph nodes and lungs. The addition of Bap1 loss increased tumor proliferation and cutaneous melanoma size. Integrative transcriptome analysis of human and murine melanomas identified RasGRP3 to be specifically expressed in GNAQ/GNA11-driven melanomas. In human UM cell lines and murine models, RasGRP3 is specifically required for GNAQ/GNA11-driven Ras activation and tumorigenesis. This implicates RasGRP3 as a critical node and a potential target in UM.
journal_name
Cell Repjournal_title
Cell reportsauthors
Moore AR,Ran L,Guan Y,Sher JJ,Hitchman TD,Zhang JQ,Hwang C,Walzak EG,Shoushtari AN,Monette S,Murali R,Wiesner T,Griewank KG,Chi P,Chen Ydoi
10.1016/j.celrep.2018.01.081subject
Has Abstractpub_date
2018-02-27 00:00:00pages
2455-2468issue
9issn
2211-1247pii
S2211-1247(18)30145-1journal_volume
22pub_type
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