lncRNA directs cooperative epigenetic regulation downstream of chemokine signals.

lncRNA directs cooperative epigenetic regulation downstream of chemokine signals.
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DOI:
10.1016/j.cell.2014.10.013
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发表时间:
2014-11-20
期刊:
影响因子:
64.5
通讯作者:
Yang L
Yang L
中科院分区:
生物学1区
文献类型:
--
作者:
Xing Z;Lin A;Li C;Liang K;Wang S;Liu Y;Park PK;Qin L;Wei Y;Hawke DH;Hung MC;Lin C;Yang L

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LncRNAs are known to regulate a number of different development and tumorigenic processes. Here we report a role for lncRNA BCAR4 in breast cancer metastasis that is mediated by chemokine-induced binding of BCAR4 to two transcription factors with extended regulatory consequences. BCAR4 binding of SNIP1 and PNUTS in response to CCL21 releases the SNIP1's inhibition of p300-dependent histone acetylation that in turn enables the BCAR4-recruited PNUTS to bind H3K18ac and relieve inhibition of RNA Pol II via activation of the PP1 phosphatase. This mechanism activates a noncanonical Hedgehog/GLI2 transcriptional program that promotes cell migration. BCAR4 expression correlates with advanced breast cancers and therapeutic delivery of Locked Nucleic Acids (LNAs) targeting BCAR4 strongly suppresses breast cancer metastasis in mouse models. The findings reveal a disease-relevant lncRNA mechanism consisting of both direct coordinated protein recruitment and indirect regulation of transcription factors.
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