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可变剪接调节癌症侵袭性:在 EMT/转移和化疗耐药中的作用。

Alternative splicing modulates cancer aggressiveness: role in EMT/metastasis and chemoresistance.

机构信息

Amity Institute of Biotechnology, Amity University, Kolkata, Major Arterial Road (South-East), AA II, Newtown, Kolkata, West Bengal, 700135, India.

出版信息

Mol Biol Rep. 2021 Jan;48(1):897-914. doi: 10.1007/s11033-020-06094-y. Epub 2021 Jan 5.

Abstract

Enhanced metastasis and disease recurrence accounts for the high mortality rates associated with cancer. The process of Epithelial-Mesenchymal Transition (EMT) contributes towards the augmentation of cancer invasiveness along with the gain of stem-like and the subsequent drug-resistant behavior. Apart from the well-established transcriptional regulation, EMT is also controlled post-transcriptionally by virtue of alternative splicing (AS). Numerous genes including Fibroblast Growth Factor receptor (FGFR) as well as CD44 are differentially spliced during this trans-differentiation process which, in turn, governs cancer progression. These splicing alterations are controlled by various splicing factors including ESRP, RBFOX2 as well as hnRNPs. Here, we have depicted the mechanisms governing the splice isoform switching of FGFR and CD44. Moreover, the role of the splice variants generated by AS of these gene transcripts in modulating the metastatic potential and stem-like/chemoresistant behavior of cancer cells has also been highlighted. Additionally, the involvement of splicing factors in regulating EMT/invasiveness along with drug-resistance as well as the metabolic properties of the cells has been emphasized. Tumorigenesis is accompanied by a remodeling of the cellular splicing profile generating diverse protein isoforms which, in turn, control the cancer-associated hallmarks. Therefore, we have also briefly discussed about a wide variety of genes which are differentially spliced in the tumor cells and promote cancer progression. We have also outlined different strategies for targeting the tumor-associated splicing events which have shown promising results and therefore this approach might be useful in developing therapies to reduce cancer aggressiveness in a more specific manner.

摘要

增强的转移和疾病复发导致癌症高死亡率。上皮-间质转化(EMT)过程有助于增强癌症侵袭性,并获得干细胞样特性和随后的耐药行为。除了已确立的转录调控外,EMT 还通过选择性剪接(AS)进行转录后控制。在这个转化过程中,许多基因包括成纤维细胞生长因子受体(FGFR)和 CD44 都发生了差异剪接,进而控制着癌症的进展。这些剪接改变受各种剪接因子控制,包括 ESRP、RBFOX2 和 hnRNPs。在这里,我们描述了调控 FGFR 和 CD44 剪接异构体转换的机制。此外,还强调了这些基因转录本 AS 产生的剪接变体在调节癌细胞的转移潜力、干细胞样/化疗耐药性和代谢特性方面的作用。肿瘤发生伴随着细胞剪接谱的重塑,产生不同的蛋白质异构体,进而控制与癌症相关的特征。因此,我们还简要讨论了在肿瘤细胞中差异剪接并促进癌症进展的广泛基因。我们还概述了针对肿瘤相关剪接事件的不同策略,这些策略已显示出有希望的结果,因此这种方法可能有助于以更特异的方式开发减少癌症侵袭性的疗法。

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