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Publication

An ShRNA Screen Identifies MEIS1 as a Driver of Malignant Peripheral Nerve Sheath Tumors.

EBioMedicine | 2016

Malignant peripheral nerve sheath tumors (MPNST) are rare soft tissue sarcomas that are a major source of mortality in neurofibromatosis type 1 (NF1) patients. To identify MPNST driver genes, we performed a lentiviral short hairpin (sh) RNA screen, targeting all 130 genes up-regulated in neurofibroma and MPNSTs versus normal human nerve Schwann cells. NF1 mutant cells show activation of RAS/MAPK signaling, so a counter-screen in RAS mutant carcinoma cells was performed to exclude common RAS-pathway driven genes. We identified 7 genes specific for survival of MPSNT cells, including MEIS1. MEIS1 was frequently amplified or hypomethylated in human MPSNTs, correlating with elevated MEIS1 gene expression. In MPNST cells and in a genetically engineered mouse model, MEIS1 expression in developing nerve glial cells was necessary for MPNST growth. Mechanistically, MEIS1 drives MPNST cell growth via the transcription factor ID1, thereby suppressing expression of the cell cycle inhibitor p27(Kip) and maintaining cell survival.

Pubmed ID: 27333032 RIS Download

Research resources used in this publication

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Associated grants

Agency: NINDS NIH HHS, United States
Id: R01 NS028840
Agency: NINDS NIH HHS, United States
Id: R01 NS086219

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