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lncRNA 通过增强 活性促进结直肠癌细胞的增殖、迁移和侵袭,并抑制其凋亡。

lncRNA promotes proliferation, migration and invasion and suppresses apoptosis in colorectal cancer cells by enhancing activity.

出版信息

Acta Biochim Biophys Sin (Shanghai). 2023 Feb 15;55(4):649-660. doi: 10.3724/abbs.2023010.

Abstract

Tumour cells change their metabolic patterns to support high proliferation rates and cope with oxidative stress. The lncRNA is highly expressed in a wide range of cancers and is essential to the proliferation and apoptosis of tumour cells. Nevertheless, its function in the metabolic reprogramming of tumour cells is unclear. Here we show that promotes glucose consumption as well as lactate and NADPH production. Database searching, bioinformatics analysis, RNA immunoprecipitation (RIP) and RNA pull-down assays show that enhances glucose-6-phosphate dehydrogenase ( ) expression and activates the pentose phosphate pathway (PPP) by promoting degradation. In addition, luciferase reporter assay and chromatin immunoprecipitation (ChIP) show that binds to the promoter to promote transcriptional activation of . Consistent with the experiments, knockdown of impedes the growth of tumours transplanted into mice by inhibiting the expression of . In conclusion, this study reveals that activates the PPP, and validates the regulatory role of the / / / axis in colorectal cancer.

摘要

肿瘤细胞改变其代谢模式以支持高增殖率并应对氧化应激。该 lncRNA 在广泛的癌症中高度表达,对肿瘤细胞的增殖和凋亡至关重要。然而,其在肿瘤细胞代谢重编程中的功能尚不清楚。在这里,我们表明 促进葡萄糖消耗以及乳酸盐和 NADPH 的产生。数据库搜索、生物信息学分析、RNA 免疫沉淀 (RIP) 和 RNA 下拉测定表明, 通过促进葡萄糖-6-磷酸脱氢酶 ( )的降解来增强其表达并激活磷酸戊糖途径 (PPP)。此外,荧光素酶报告基因测定和染色质免疫沉淀 (ChIP) 表明 与 启动子结合以促进 的转录激活。与 实验一致,通过抑制 的表达,敲低 可抑制移植到小鼠中的肿瘤的生长。总之,这项研究揭示了 激活 PPP,并验证了 / / / 轴在结直肠癌中的调节作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb2/10195140/0cfaf974d6ba/ABBS-2022-403-t1.jpg

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