Up-regulated deubiquitinase USP4 plays an oncogenic role in melanoma.

Up-regulated deubiquitinase USP4 plays an oncogenic role in melanoma.
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上调去泛素酶 USP4 在黑色素瘤中发挥致癌作用

DOI:
10.1111/jcmm.13603
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发表时间:
2018-05
影响因子:
5.3
通讯作者:
Shi Q
Shi Q
中科院分区:
医学2区
文献类型:
--
作者:
Guo W;Ma J;Pei T;Zhao T;Guo S;Yi X;Liu Y;Wang S;Zhu G;Jian Z;Gao T;Li C;Liao W;Shi Q

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黑色素瘤是最恶性的皮肤癌,在世界范围内发病率不断增加。尽管BRAF抑制剂和免疫检查点抑制剂等创新疗法已经取得了显着进展,但转移性黑色素瘤仍然是一种无法治愈的疾病,因为它具有臭名昭著的侵略性。因此,进一步阐明黑色素瘤的发病机制对于改善黑色素瘤的治疗至关重要。遍在蛋白化是癌症标志和黑色素瘤发展的一个重要调节事件,而包括遍在蛋白特异性肽酶(USP)家族在内的去遍在蛋白化酶在调节癌症生物学方面有很大关系。在此,我们首次发现去泛素化酶USP 4的表达在黑色素瘤组织和细胞系中显著上调。此外,尽管USP 4敲低对黑色素瘤细胞增殖的影响很小,但它可以增加对DNA损伤剂顺铂的敏感性。我们随后发现USP 4通过p53信号传导调节顺铂诱导的细胞凋亡。更重要的是,USP 4可以通过促进上皮-间质转化来增强黑色素瘤细胞的侵袭和迁移能力。总之,我们的结果表明,上调的USP 4通过同时抑制应激诱导的细胞凋亡和促进肿瘤转移在黑色素瘤中发挥致癌作用。
Melanoma is the most malignant skin cancer with increasing incidence worldwide. Although innovative therapies such as BRAF inhibitor and immune checkpoint inhibitor have gained remarkable advances, metastatic melanoma remains an incurable disease for its notorious aggressiveness. Therefore, further clarification of the underlying mechanism of melanoma pathogenesis is critical for the improvement of melanoma therapy. Ubiquitination is an important regulatory event for cancer hallmarks and melanoma development, and the deubiquitinating enzymes including ubiquitin‐specific peptidase (USP) families are greatly implicated in modulating cancer biology. Herein, we first found that the expression of the deubiquitinase USP4 was significantly up‐regulated in melanoma tissues and cell lines. Furthermore, although USP4 knockdown had little impact on melanoma cell proliferation, it could increase the sensitivity to DNA damage agent cisplatin. We subsequently showed that USP4 regulated cisplatin‐induced cell apoptosis via p53 signalling. More importantly, USP4 could accentuate the invasive and migratory capacity of melanoma cells by promoting epithelial‐mesenchymal transition. Altogether, our results demonstrate that the up‐regulated USP4 plays an oncogenic role in melanoma by simultaneously suppressing stress‐induced cell apoptosis and facilitating tumour metastasis.
下调的 miR-23a 通过促进自噬促进皮肤黑色素瘤的转移
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