期刊
GENES & DEVELOPMENT
卷 36, 期 11-12, 页码 737-751出版社
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.349596.122
关键词
cell cycle; cilia; medulloblastoma; translation; WNT
资金
- National Institutes of Health/National Cancer Institute Cancer Center Core Support grant [CA021765]
- Sontag Foundation Distinguished Scientist Award [CA096832]
- American Lebanese Syrian Associated Charities
This study reveals that primary cilia have different functions in different types of tumors and uncovers the molecular mechanisms underlying their involvement in tumorigenesis.
The primary cilium, a signaling organelle projecting from the surface of a cell, controls cellular physiology and behavior. The presence or absence of primary cilia is a distinctive feature of a given tumor type; however, whether and howthe primary cilium contributes to tumorigenesis are unknown for most tumors. Medulloblastoma (MB) is a common pediatric brain cancer comprising four groups: SHH, WNT, group 3 (G3), and group 4 (G4). From 111 cases of MB, we show that primary cilia are abundant in SHH and WNT MBs but rare in G3 and G4 MBs. Using WNT and G3 MB mouse models, we show that primary cilia promote WNT MB by facilitating translation of mRNA encoding beta-catenin, a major oncoprotein driving WNT MB, whereas cilium loss promotes G3 MB by disrupting cell cycle control and destabilizing the genome. Our findings reveal tumor type-specific ciliary functions and underlying molecular mechanisms. Moreover, we expand the function of primary cilia to translation control and reveal a molecular mechanism by which cilia regulate cell cycle progression, thereby providing new frameworks for studying cilium function in normal and pathologic conditions.
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