当前位置: X-MOL 学术Stem Cell Res. Ther. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Requirement of splicing factor hnRNP A2B1 for tumorigenesis of melanoma stem cells
Stem Cell Research & Therapy ( IF 7.1 ) Pub Date : 2021-01-28 , DOI: 10.1186/s13287-020-02124-5
Mengqi Chu 1 , Haitao Wan 1 , Xiaobo Zhang 1
Affiliation  

Cancer stem cells play essential roles in tumorigenesis, thus forming an important target for tumor therapy. The hnRNP family proteins are important splicing factors that have been found to be associated with tumor progression. However, the influence of hnRNPs on cancer stem cells has not been extensively explored. Quantitative real-time PCR and Western blot were used to examine gene expressions. RNA immunoprecipitation assays were conducted to identify the RNAs interacted with hnRNP A2B1. The in vivo assays were performed in nude mice. In this study, the results showed that out of 19 evaluated hnRNPs, hnRNP A2B1 was significantly upregulated in melanoma stem cells compared with non-stem cells, suggesting an important role of hnRNP A2B1 in cancer stem cells. Silencing of hnRNP A2B1 triggered cell cycle arrest in G2 phase, leading to apoptosis of melanoma stem cells. The results also revealed that hnRNP A2B1 could bind to the precursor mRNAs of pro-apoptosis genes (DAPK1, SYT7, and RNF128) and anti-apoptosis genes (EIF3H, TPPP3, and DOCK2) to regulate the splicing of these 6 genes, thus promoting the expressions of anti-apoptosis genes and suppressing the expressions of pro-apoptosis genes. The in vivo data indicated that hnRNP A2B1 was required for tumorigenesis by affecting the splicing of TPPP3, DOCK2, EIF3H, RNF128, DAPK1, and SYT7, thus suppressing apoptosis of melanoma stem cells. Our findings showed the requirement of hnRNP A2B1 for tumorigenesis, thus presenting novel molecular insights into the role of hnRNPs in cancer stem cells.

中文翻译:

黑色素瘤干细胞肿瘤发生对剪接因子hnRNP A2B1的要求

癌症干细胞在肿瘤发生中发挥重要作用,因此成为肿瘤治疗的重要靶点。hnRNP 家族蛋白是已发现与肿瘤进展相关的重要剪接因子。然而,hnRNPs 对癌症干细胞的影响尚未得到广泛研究。定量实时 PCR 和蛋白质印迹用于检查基因表达。进行 RNA 免疫沉淀测定以鉴定与 hnRNP A2B1 相互作用的 RNA。在裸鼠中进行体内测定。在这项研究中,结果显示在 19 个评估的 hnRNP 中,与非干细胞相比,hnRNP A2B1 在黑色素瘤干细胞中显着上调,表明 hnRNP A2B1 在癌症干细胞中的重要作用。hnRNP A2B1 的沉默触发了 G2 期的细胞周期停滞,导致黑色素瘤干细胞凋亡。结果还表明,hnRNP A2B1 可以与促凋亡基因(DAPK1、SYT7 和 RNF128)和抗凋亡基因(EIF3H、TPPP3 和 DOCK2)的前体 mRNAs 结合,从而调节这 6 个基因的剪接,从而促进抗凋亡基因的表达和抑制促凋亡基因的表达。体内数据表明,hnRNP A2B1 是肿瘤发生所必需的,它通过影响 TPPP3、DOCK2、EIF3H、RNF128、DAPK1 和 SYT7 的剪接,从而抑制黑色素瘤干细胞的凋亡。我们的研究结果表明了 hnRNP A2B1 对肿瘤发生的需求,从而为 hnRNP 在癌症干细胞中的作用提供了新的分子见解。SYT7、RNF128)和抗凋亡基因(EIF3H、TPPP3、DOCK2)调控这6个基因的剪接,从而促进抗凋亡基因的表达,抑制促凋亡基因的表达。体内数据表明,hnRNP A2B1 是肿瘤发生所必需的,它通过影响 TPPP3、DOCK2、EIF3H、RNF128、DAPK1 和 SYT7 的剪接,从而抑制黑色素瘤干细胞的凋亡。我们的研究结果表明了 hnRNP A2B1 对肿瘤发生的需求,从而为 hnRNP 在癌症干细胞中的作用提供了新的分子见解。SYT7、RNF128)和抗凋亡基因(EIF3H、TPPP3、DOCK2)调控这6个基因的剪接,从而促进抗凋亡基因的表达,抑制促凋亡基因的表达。体内数据表明,hnRNP A2B1 是肿瘤发生所必需的,它通过影响 TPPP3、DOCK2、EIF3H、RNF128、DAPK1 和 SYT7 的剪接,从而抑制黑色素瘤干细胞的凋亡。我们的研究结果表明了 hnRNP A2B1 对肿瘤发生的需求,从而为 hnRNP 在癌症干细胞中的作用提供了新的分子见解。体内数据表明,hnRNP A2B1 是肿瘤发生所必需的,它通过影响 TPPP3、DOCK2、EIF3H、RNF128、DAPK1 和 SYT7 的剪接,从而抑制黑色素瘤干细胞的凋亡。我们的研究结果表明了 hnRNP A2B1 对肿瘤发生的需求,从而为 hnRNP 在癌症干细胞中的作用提供了新的分子见解。体内数据表明,hnRNP A2B1 是肿瘤发生所必需的,它通过影响 TPPP3、DOCK2、EIF3H、RNF128、DAPK1 和 SYT7 的剪接,从而抑制黑色素瘤干细胞的凋亡。我们的研究结果表明了 hnRNP A2B1 对肿瘤发生的需求,从而为 hnRNP 在癌症干细胞中的作用提供了新的分子见解。
更新日期:2021-01-28
down
wechat
bug