The SWI/SNF chromatin remodeling factor DPF3 regulates metastasis of ccRCC by modulating TGF-β signaling.

The SWI/SNF chromatin remodeling factor DPF3 regulates metastasis of ccRCC by modulating TGF-β signaling.
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SWI/SNF 染色质重塑因子 DPF3 通过调节 TGF-β 信号调节 ccRCC 的转移

DOI:
10.1038/s41467-022-32472-0
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发表时间:
2022-08-09
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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DPF 3是SWI/SNF染色质重塑复合物的一种组分,在全基因组关联研究中与透明细胞肾细胞癌(ccRCC)相关。然而,DPF 3在ccRCC发展和进展中的功能作用仍然未知。在这项研究中,我们证明了DPF 3的短亚型DPF 3a在体外和体内都促进肾癌细胞迁移,这与临床观察结果一致,即DPF 3a在具有转移的ccRCC患者中显著上调。在机制上,DPF 3a特异性地与SNIP 1相互作用,通过SNIP 1,DPF 3a与SMAD 4和p300组蛋白乙酰转移酶(HAT)(TGF-β信号通路的主要转录调节因子)形成复合物。此外,DPF 3a的结合释放了SNIP 1对p300 HAT活性的抑制作用,导致局部组蛋白乙酰化增加和细胞运动相关基因的激活。总的来说,我们的研究结果揭示了DPF 3的转移促进功能,并进一步建立了SWI/SNF组分与ccRCC之间的联系。DPF 3是与肾透明细胞癌(ccRCC)相关的SWI/SNF染色质重塑复合物的组分,其功能作用仍然未知。在这里,作者阐明了DPF 3通过激活ccRCC中的TGF-β信号通路促进转移的机制。
DPF3, a component of the SWI/SNF chromatin remodeling complex, has been associated with clear cell renal cell carcinoma (ccRCC) in a genome-wide association study. However, the functional role of DPF3 in ccRCC development and progression remains unknown. In this study, we demonstrate that DPF3a, the short isoform of DPF3, promotes kidney cancer cell migration both in vitro and in vivo, consistent with the clinical observation that DPF3a is significantly upregulated in ccRCC patients with metastases. Mechanistically, DPF3a specifically interacts with SNIP1, via which it forms a complex with SMAD4 and p300 histone acetyltransferase (HAT), the major transcriptional regulators of TGF-β signaling pathway. Moreover, the binding of DPF3a releases the repressive effect of SNIP1 on p300 HAT activity, leading to the increase in local histone acetylation and the activation of cell movement related genes. Overall, our findings reveal a metastasis-promoting function of DPF3, and further establish the link between SWI/SNF components and ccRCC. The functional role of DPF3, a component of the SWI/SNF chromatin remodelling complex associated with clear cell renal cell carcinoma (ccRCC), remains unknown. Here, the authors characterise the mechanism by which DPF3 promotes metastasis via the activation of the TGF-β signalling pathway in ccRCC.
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