1.中山大学医学院,广东 深圳 518107
2.中山大学附属第三医院血液内科,广东 广州 510630
麦芷莹,学士,研究方向:血液肿瘤,E-mail:maizhy6@ mail2.sysu.edu.cn
收稿:2021-11-29,
纸质出版:2022-05-20
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麦芷莹,陈淑娜,张幸鼎等.E2F转录因子2对多发性骨髓瘤细胞粘附的影响[J].中山大学学报(医学科学版),2022,43(03):361-372.
MAI Zhi-ying,CHEN Shu-na,ZHANG Xing-ding,et al.Effects of Transcription Factor E2F2 on Cell Adhesion in Multiple Myeloma[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(03):361-372.
麦芷莹,陈淑娜,张幸鼎等.E2F转录因子2对多发性骨髓瘤细胞粘附的影响[J].中山大学学报(医学科学版),2022,43(03):361-372. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0304.
MAI Zhi-ying,CHEN Shu-na,ZHANG Xing-ding,et al.Effects of Transcription Factor E2F2 on Cell Adhesion in Multiple Myeloma[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(03):361-372. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0304.
目的
2
结合生物信息学途径和细胞分子实验,探讨E2F转录因子2(
E2F2
)对多发性骨髓瘤细胞粘附的影响。
方法
2
首先,利用临床样本和GEO数据库分析
E2F2
在骨髓瘤中的表达水平与患者的预后关系。其次,从敲低
E2F2
的骨髓瘤细胞系MM.1S的RNA-seq数据中筛选差异基因,并进行GO功能富集和KEGG信号通路分析,同时,利用string网站进行蛋白互作网络分析。构建稳定敲低
E2F2
的骨髓瘤细胞系MM.1S,并经蛋白印迹法(Western Blot)和荧光定量PCR(qRT-PCR)检测
E2F2
的表达水平。通过细胞粘附实验检测稳定敲低
E2F2
对骨髓瘤细胞粘附的影响,利用qRT-PCR检测稳定敲低
E2F2
后细胞粘附相关基因的表达变化。通过细胞迁移实验检测稳定敲低
E2F2
对骨髓瘤细胞迁移的影响。
结果
2
我们在骨髓瘤患者的临床样本中观察到
E2F2
的表达显著升高,GEO数据库结果显示
E2F2
在骨髓瘤中高表达提示患者预后不良。分析RNA-Seq数据获得815个共同差异基因,其中508个基因上调表达,307个基因下调表达,这些差异基因与细胞粘附和血管生成等功能密切相关。经Western Blot和qRT-PCR验证,成功构建稳定敲低
E2F2
的MM.1S细胞系。敲低
E2F2
显著增加 MM.1S细胞的粘附水平和升高
FN1
、
PECAM1
、
ICOSLG
等细胞粘附相关基因的表达,同时减弱MM.1S细胞迁移侵袭的能力,
P
值均
<
0.05。
结论
2
通过对RNA-seq数据的生物信息学分析,我们发现转录因子
E2F2
与骨髓瘤的细胞粘附密切相关,在骨髓瘤MM.1S细胞系中敲低
E2F2
能促进细胞粘附相关基因的表达和增加细胞粘附水平,并抑制细胞迁移能力。
Objective
2
To investigate the influence of E2F transcription factor 2 (
E2F2
) on the cell adhesion of multiple myeloma cells by combining bioinformatics and cellular and molecular experiments.
Methods
2
Firstly, clinical samples and GEO database were used to analyze the relationship between the
E2F2
expression and the prognosis of myeloma patients. Then, differential genes were screened from the RNA-seq data of
E2F2
knockdown myeloma cell line MM.1S. The GO biological function enrichment and KEGG signal pathway analysis were performed on these differential genes. Meanwhile, the protein interaction network was analyzed by using the string website. The
E2F2
stable knockdown MM.1S cell line were constructed, and the expression level of
E2F2
was measured by Western Blotting and qRT-PCR. The effect of stable knockdown
E2F2
on the adhesion of myeloma cells was detected by cell adhesion experiment, and the expression of cell adhesion related genes were detected by qRT-PCR. The effect of stable
E2F2
knockdown on myeloma cell migration was detected by cell migration assay.
Results
2
The expression of
E2F2
was significantly increased in clinical samples of myeloma patients, and the high expression of
E2F2
is correlated with poor prognosis of myeloma patients in the GEO database. The analysis of RNA-seq data revealed 815 differentially expressed genes, of which 508 genes were up-regulated and 307 genes were down-regulated. These genes were closely related to the cell adhesion and angiogenesis. The construction of
E2F2
knockdown MM.1S cell lines were verified by Western Blotting and qRT-PCR. Knockdown of
E2F2
significantly increased the adhesion level of MM.1S cells and elevated the expression of
FN1
,
PECAM1
,
ICOSLG
and other cell adhesion related genes, while weakening the invasion ability of MM.1S cells,
P
<
0.05.
Conclusions
2
Through bioinformatics analysis of the RNA-seq data, we found that the transcription factor
E2F2
is closely related to the cell adhesion in myeloma. Knockdown of
E2F2
in the MM.1S cell line promotes the expression of cell adhesion related genes, increases the cell adhesion level, and inhibites cell migration ability.
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