Ubiquitination of p21 by E3 Ligase TRIM21 Promotes the Proliferation of Human Neuroblastoma Cells

Ubiquitination of p21 by E3 Ligase TRIM21 Promotes the Proliferation of Human Neuroblastoma Cells
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E3 连接酶 TRIM21 泛素化 p21 促进人神经母细胞瘤细胞增殖

DOI:
10.1007/s12017-021-08661-3
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发表时间:
2021-04
影响因子:
3.5
通讯作者:
Lu Jianglong
Lu Jianglong
中科院分区:
医学3区
文献类型:
--
作者:
Wang Fan;Wu Zerui;Li Qun;Ni Zhihui;Wang Chengde;Lu Jianglong

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神经母细胞瘤(NB)是儿童期最常见的颅外实体瘤,具有很大的临床和生物分子异质性。目前神经母细胞瘤的治疗仍以手术为主,缺乏特异性的治疗药物,迫切需要有效的靶点。TRIM21是一种RING型E3连接酶,其过表达可促进人脑胶质瘤的进展,但其对神经母细胞瘤的作用尚未阐明。首先,设计了针对TRIM21的shRNA,发现TRIM21的缺失抑制了人神经母细胞瘤细胞的增殖。分子机制研究表明,TRIM21与p21相互作用,通过泛素化修饰介导p21降解。进一步的研究表明,TRIM21以p21依赖的方式调节神经母细胞瘤细胞的增殖。这些结果表明TRIM21可能是神经母细胞瘤的潜在治疗靶点。
Neuroblastoma (NB) is the most common extracranial solid tumor in childhood, which shows great clinical and biomolecule heterogeneity. Currently, surgery is still the main method of neuroblastoma treatment and specific therapeutic drugs are lacking, so useful targets are urgently needed. TRIM21 is a RING-type E3 ligase that its overexpression promotes the progression of human glioma, while whose effects on neuroblastoma have not been illustrated. Firstly, the shRNAs targeting TRIM21 were designed and found that the ablation of TRIM21 inhibits the proliferation of human neuroblastoma cells. Then the molecular mechanism study indicated that TRIM21 interacts with, and mediates p21 degradation by ubiquitination modification. Further study demonstrates that TRIM21 regulates the proliferation of neuroblastoma cells in a p21-dependent manner. These results suggest that TRIM21 might be a potential therapeutic target for neuroblastoma.
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