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A recurrent point mutation in PRKCA is a hallmark of chordoid gliomas
Chordoid glioma (ChG) is a characteristic, slow growing, and well-circumscribed diencephalic tumor, whose mutational landscape is unknown. Here we report the analysis of 16 ChG by whole-exome and RNA-sequencing. We found that 15 ChG harbor the same PRKCA(D463H) mutation. PRKCA encodes the Protein ki...
Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6006150/ https://www.ncbi.nlm.nih.gov/pubmed/29915258 http://dx.doi.org/10.1038/s41467-018-04622-w |
Sumario: | Chordoid glioma (ChG) is a characteristic, slow growing, and well-circumscribed diencephalic tumor, whose mutational landscape is unknown. Here we report the analysis of 16 ChG by whole-exome and RNA-sequencing. We found that 15 ChG harbor the same PRKCA(D463H) mutation. PRKCA encodes the Protein kinase C (PKC) isozyme alpha (PKCα) and is mutated in a wide range of human cancers. However the hot spot PRKCA(D463H) mutation was not described in other tumors. PRKCA(D463H) is strongly associated with the activation of protein translation initiation (EIF2) pathway. PKCα(D463H) mRNA levels are more abundant than wild-type PKCα transcripts, while PKCα(D463H) is less stable than the PCKα(WT) protein. Compared to PCKα(WT), the PKCα(D463H) protein is depleted from the cell membrane. The PKCα(D463H) mutant enhances proliferation of astrocytes and tanycytes, the cells of origin of ChG. In conclusion, our study identifies the hallmark mutation for chordoid gliomas and provides mechanistic insights on ChG oncogenesis. |
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