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BRAF/ERK对Abl激酶的调控及其在黑色素瘤中与Akt的协同作用。

Abl kinase regulation by BRAF/ERK and cooperation with Akt in melanoma.

作者信息

Jain A, Tripathi R, Turpin C P, Wang C, Plattner R

机构信息

Department of Pharmacology and Nutritional Sciences, University of Kentucky School of Medicine, Lexington, KY, USA.

Department of Biostatistics and Markey Cancer Center, University of Kentucky School of Medicine, Lexington, KY, USA.

出版信息

Oncogene. 2017 Aug 10;36(32):4585-4596. doi: 10.1038/onc.2017.76. Epub 2017 Apr 3.


DOI:10.1038/onc.2017.76
PMID:28368422
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5552414/
Abstract

The melanoma incidence continues to increase, and the disease remains incurable for many due to its metastatic nature and high rate of therapeutic resistance. In particular, melanomas harboring BRAF and PTEN mutations often are resistant to current therapies, including BRAF inhibitors (BRAFi) and immune checkpoint inhibitors. Abl kinases (Abl/Arg) are activated in melanomas and drive progression; however, their mechanism of activation has not been established. Here we elucidate a novel link between BRAF/ERK signaling and Abl kinases. We demonstrate that BRAF/ERK play a critical role in binding, phosphorylating and regulating Abl localization and Abl/Arg activation by Src family kinases. Importantly, Abl/Arg activation downstream of BRAF has functional and biological significance, driving proliferation, invasion, as well as switch in epithelial-mesenchymal-transition transcription factor expression, which is known to be critical for melanoma cells to shift between differentiated and invasive states. Finally, we describe findings of high translational significance by demonstrating that Abl/Arg cooperate with PI3K/Akt/PTEN, a parallel pathway that is associated with intrinsic resistance to BRAFi and immunotherapy, as Abl/Arg and Akt inhibitors cooperate to prevent viability, cell cycle progression and in vivo growth of melanomas harboring mutant BRAF/PTEN. Thus, these data not only provide mechanistic insight into Abl/Arg regulation during melanoma development, but also pave the way for the development of new strategies for treating patients with melanomas harboring mutant BRAF/PTEN, which often are refractory to current therapies.

摘要

黑色素瘤的发病率持续上升,由于其转移性和高治疗抵抗率,许多患者的疾病仍无法治愈。特别是,携带BRAF和PTEN突变的黑色素瘤通常对包括BRAF抑制剂(BRAFi)和免疫检查点抑制剂在内的当前疗法具有抗性。Abl激酶(Abl/Arg)在黑色素瘤中被激活并驱动肿瘤进展;然而,它们的激活机制尚未明确。在此,我们阐明了BRAF/ERK信号与Abl激酶之间的一种新联系。我们证明BRAF/ERK在结合、磷酸化以及调节Abl定位和Src家族激酶对Abl/Arg的激活中起关键作用。重要的是,BRAF下游的Abl/Arg激活具有功能和生物学意义,可驱动增殖、侵袭以及上皮-间质转化转录因子表达的转变,而这一转变对于黑色素瘤细胞在分化和侵袭状态之间转换至关重要。最后,我们通过证明Abl/Arg与PI3K/Akt/PTEN(一条与对BRAFi和免疫疗法的内在抗性相关的平行信号通路)协同作用,描述了具有高度转化意义的研究结果,因为Abl/Arg抑制剂和Akt抑制剂协同作用可抑制携带突变BRAF/PTEN的黑色素瘤细胞的活力、细胞周期进程及体内生长。因此,这些数据不仅为黑色素瘤发生过程中Abl/Arg的调控提供了机制性见解,也为开发治疗携带突变BRAF/PTEN的黑色素瘤患者的新策略铺平了道路,这类患者通常对当前疗法难治。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/371bf458f6a8/nihms855383f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/d27560500c89/nihms855383f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/823c86fd28e0/nihms855383f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/68523e439c8b/nihms855383f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/0d6de95cad81/nihms855383f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/c25236eb4652/nihms855383f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/b28cabf2b750/nihms855383f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/371bf458f6a8/nihms855383f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/d27560500c89/nihms855383f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/823c86fd28e0/nihms855383f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/68523e439c8b/nihms855383f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/0d6de95cad81/nihms855383f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/c25236eb4652/nihms855383f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/b28cabf2b750/nihms855383f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cad/5552414/371bf458f6a8/nihms855383f7.jpg

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[8]
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本文引用的文献

[1]
ZEB1-mediated melanoma cell plasticity enhances resistance to MAPK inhibitors.

EMBO Mol Med. 2016-10-4

[2]
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[3]
Loss of PTEN Promotes Resistance to T Cell-Mediated Immunotherapy.

Cancer Discov. 2016-2

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The Emerging Role of ABL Kinases in Solid Tumors.

Trends Cancer. 2015-10-1

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Decrease of ZEB1 expression inhibits the B16F10 cancer stem-like properties.

Biosci Trends. 2015-10

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BMC Cancer. 2015-2-18

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Melanoma cells revive an embryonic transcriptional network to dictate phenotypic heterogeneity.

Front Oncol. 2014-12-9

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Paradox-breaking RAF inhibitors that also target SRC are effective in drug-resistant BRAF mutant melanoma.

Cancer Cell. 2014-12-11

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c-Abl modulates tumor cell sensitivity to antibody-dependent cellular cytotoxicity.

Cancer Immunol Res. 2014-10-9

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