Translation of non-canonical open reading frames as a cancer cell survival mechanism in childhood medulloblastoma
MOLECULAR CELL(2024)
摘要
A hallmark of high -risk childhood medulloblastoma is the dysregulation of RNA translation. Currently, it is unknown whether medulloblastoma dysregulates the translation of putatively oncogenic non -canonical open reading frames (ORFs). To address this question, we performed ribosome profiling of 32 medulloblastoma tissues and cell lines and observed widespread non -canonical ORF translation. We then developed a stepwise approach using multiple CRISPR-Cas9 screens to elucidate non -canonical ORFs and putative microproteins implicated in medulloblastoma cell survival. We determined that multiple lncRNA-ORFs and upstream ORFs (uORFs) exhibited selective functionality independent of main coding sequences. A microprotein encoded by one of these ORFs, ASNSD1-uORF or ASDURF, was upregulated, associated with MYC-family oncogenes, and promoted medulloblastoma cell survival through engagement with the prefoldin-like chaperone complex. Our findings underscore the fundamental importance of non -canonical ORF translation in medulloblastoma and provide a rationale to include these ORFs in future studies seeking to define new cancer targets.
更多查看译文
关键词
cancer,gene dependency,CRISPR,medulloblastoma,non-canonical ORFs,Ribo-seq,translational regulation,lncRNAs,uORF
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要