SAMD13通过激活ERK1/2对胶质瘤细胞增殖和侵袭的影响
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1.南京中医药大学附属江苏省中医院;2.南京医科大学基础医学院;3.南京医科大学第一临床医学院临床医学系长学制;4.南京医科大学第一附属医院肿瘤科

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国家自然科学基金资助项目(No. 81902878),江苏省高等学校大学生创新训练计划项目(202010312039Y)


The effects of SAMD13 on glioma cell proliferation and invasion via activating ERK1/2
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    摘要:

    目的:检测胶质瘤组织和细胞中无菌α基序结构域蛋白13(sterile alpha motif domain-containing protein 13,SAMD13)的表达情况,并探究SAMD13表达对胶质瘤细胞增殖和侵袭的影响和调控机制。方法:使用GEPIA数据库分析胶质瘤患者癌组织中SAMD13的表达及其与预后的相关性。行RT-PCR和Western blot检查胶质瘤细胞系(U373、U87和U251)中SAMD13的表达情况。构建SAMD13过表达质粒(pIRES2-SAMD13)和SAMD13 shRNA质粒(shSAMD13),转染细胞后行Western blot、CCK-8和Transwell实验,检测过表达和沉默SAMD13基因对于U373细胞增殖和侵袭的影响,同时检查Akt1、ERK1/2和STAT3的表达和磷酸化水平。此外,在转染pIRES2-SAMD13的同时,加入ERK1/2抑制剂(U0126),开展CCK-8和Transwell实验检查其细胞增殖和侵袭。结果:胶质瘤患者癌组织中SAMD13的表达显著高于癌旁组织,并与患者不良预后密切相关。U373、U87和U251三种胶质瘤细胞系均表达SAMD13,以U373细胞表达最为显著。在U373细胞中转染pIRES2-SAMD13和shSAMD13,可分别过表达和沉默SAMD13,并分别促进和抑制细胞的增殖和侵袭。此外,过表达和沉默SAMD13可分别显著增强和减弱U373细胞中ERK1/2的磷酸化,而对Akt1和STAT3的磷酸化无明显影响。ERK1/2抑制剂可显著抑制由SAMD13过表达所诱发的U373细胞增殖和侵袭,但对SAMD13的表达无明显影响。结论:胶质瘤组织和细胞中均高表达SAMD13,上调的SAMD13可通过激活ERK1/2促进胶质瘤细胞的增殖和侵袭。

    Abstract:

    Objective: To detect the expression of sterile alpha motif domain-containing protein 13 (SAMD13) in glioma tissues and cells, and to explore the effect of SAMD13 expression on the proliferation and invasion of glioma cells and its regulatory mechanism. Methods: The expression and prognosis correlation of SAMD13 in glioma patients was analyzed using GEPIA database. The expression of SAMD13 in glioma cells (U373, U87 and U251) was examined by RT-PCR and Western blot. SAMD13 overexpressing plasmid (pIRES2-SAMD13) and SAMD13 shRNA plasmid (shSAMD13) were constructed and transfected into U373 cells, and then the effects of SAMD13 overexpression and silencing on cell proliferation and invasion as well as Akt1, ERK1/2 and STAT3 expression and phosphorylation were determined by Western blot, CCK-8 and Transwell experiments. U373 cells were treated with pIRES2-SAMD13 and ERK1/2 inhibitor (U0126) together, and then the cell proliferation and invasion were examined by CCK-8 and Transwell experiments. Results: SAMD13 expression was increased in glioma patients and was closely correlated with prognosis. SAMD13 was also expressed in U373, U87 and U251 glioma cell lines, with U373 cells being the most significant. SAMD13 overexpression by pIRES2-SAMD13 increased the proliferation and invasion of U373 cells, and SAMD13 knockdown by shSAMD13 decreased the proliferation and invasion of U373 cells. Additionally, SAMD13 overexpression and knockdown increased and decreased ERK1/2 phosphorylation, but had no significant effects on Akt1 and STAT3 phosphorylation. Furthermore, ERK1/2 inhibitor could reduce the proliferation and invasion of U373 cells induced by SAMD13 overexpression, but had no significant effects on SAMD13 expression. Conclusion: SAMD13 is highly expressed in glioma tissues and cells, and up-regulated SAMD13 activates ERK1/2 and enhances cell proliferation and invasion of glioma cells.

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  • 收稿日期:2024-09-20
  • 最后修改日期:2024-10-22
  • 录用日期:2024-12-13
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