期刊
NATURE CELL BIOLOGY
卷 19, 期 3, 页码 238-251出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncb3473
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资金
- NIH [R01GM112003]
- NIH R00 award [R00DK094981, R00CA166527]
- CPRIT award [R1218]
- UT Startup
- UT STARS
Phosphatidylinositol-3,4,5-trisphosphate (Ptdlns(3,4,5)P-3 or PIP3) mediates signalling pathways as a second messenger in response to extracellular signals. Although primordial functions of phospholipids and RNAs have been hypothesized in the 'RNA world', physiological RNA-phospholipid interactions and their involvement in essential cellular processes have remained a mystery. We explicate the contribution of lipid-binding long non-coding RNAs (IncRNAs) in cancer cells. Among them, long intergenic non-coding RNA for kinase activation (LINK-A) directly interacts with the AKT pleckstrin homology domain and PIP3 at the single-nucleotide level, facilitating AKT-PIP3 interaction and consequent enzymatic activation. L/NK-A-dependent AKT hyperactivation leads to tumorigenesis and resistance to AKT inhibitors. Genomic deletions of the LINK-A PIP3-binding motif dramatically sensitized breast cancer cells to AKT inhibitors. Furthermore, meta-analysis showed the correlation between LINK-A expression and incidence of a single nucleotide polymorphism (rs12095274: A>G), AKT phosphorylation status, and poor outcomes for breast and lung cancer patients. PIP3-binding IncRNA modulates AKT activation with broad clinical implications.
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