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中山大学附属第六医院广东省结直肠盆底疾病研究重点实验室、广东省胃肠病学研究所, 中山大学附属第六医院生物医学创新研究院,广州 510655
李 倩,Email:17382377582@163.com,研究方向:分子医学。
袁 平,Email:yuanp8@mail.sysu.edu.cn。
收稿:2023-03-30,
修回:2023-04-08,
录用:2023-05-04,
纸质出版:2023-07-28
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李倩,胡蓉,袁平.XL413通过抑制DNA复制诱导细胞凋亡来抑制结肠癌细胞增殖[J].重庆医科大学学报,2023,48(7):753-759.
Li Qian,Hu Rong,Yuan Ping.XL413 inhibits colon cancer cell proliferation by inhibiting DNA replication and inducing cell apoptosis[J].Journal of Chongqing Medical University,2023,48(7):753-759.
李倩,胡蓉,袁平.XL413通过抑制DNA复制诱导细胞凋亡来抑制结肠癌细胞增殖[J].重庆医科大学学报,2023,48(7):753-759. DOI: 10.13406/j.cnki.cyxb.003269.
Li Qian,Hu Rong,Yuan Ping.XL413 inhibits colon cancer cell proliferation by inhibiting DNA replication and inducing cell apoptosis[J].Journal of Chongqing Medical University,2023,48(7):753-759. DOI: 10.13406/j.cnki.cyxb.003269.
目的
2
探讨抑制细胞分裂周期蛋白7(cell division cycle 7,CDC7)的药物XL413对结直肠癌细胞的影响及其作用机制。
方法
2
在多个结直肠癌细胞系中分别加入生理盐水和不同浓度的XL413处理72 h,用细胞活力检测试剂盒(cell counting Kit-8,CCK-8)检测细胞在450 nm处的吸光度值并计算细胞存活率和XL413的半抑制浓度(half maximal inhibitory concentration,IC
50
)值;Annexin V-FITC/PI双染法检测细胞凋亡;克隆形成实验检测细胞的再生能力;RNA-seq检测XL413对细胞转录组的影响;qRT-PCR法检测凋亡相关基因的mRNA表达量;Western blot检测DNA解旋微小染色体维持蛋白(minichromosome maintenance protein,MCM)复合体成员MCM2的磷酸化以及凋亡相关蛋白的表达水平。
结果
2
与对照组相比,XL413处理组结直肠癌细胞的增殖、迁移、集落形成能力均下降(
P=
0.001 5);细胞早期和晚期凋亡比例增高(
P=
0.000 6);在基因转录表达水平上,XL413处理组的细胞凋亡标志B细胞淋巴瘤基因(B-cell lymphoma-2
,BCL2
)
/BCL2
相关X基因
(
BCL2 associated X,
BAX
)的比值下降(
P=
0.008 7);在蛋白水平上,XL413抑制DNA解旋相关蛋白MCM2的磷酸化,从而抑制细胞DNA复制,同时促进凋亡相关蛋白的表达增高。
结论
2
XL413可以通过降低DNA解旋相关蛋白MCM2的磷酸化阻碍DNA的复制,诱导结直肠癌细胞凋亡。该研究为XL413未来用于结直肠癌治疗提供了一定的理论依据。
Objective
2
To investigate the effect of XL413,a drug inhibiting cell division cycle 7(CDC7),on colorectal cancer cells and its mechanism of action.
Methods
2
Multiple colorectal cancer cell lines were treated with normal saline and XL413 at different concentrations for 72 hours. CCK-8 assay was used to measure the absorbance of cells at 450 nm and calculate cell viability and the half-maximal inhibitory concentration(IC
50
) of XL413;Annexin V-FITC/PI double staining was used to measure cell apoptosis;colony formation assay was used to observe the regenerative ability of cells;RNA-seq was used to observe the effect of XL413 on cell transcriptome;qRT-PCR was used to measure the relative mRNA expression levels of apoptosis-related genes;Western blot was used to measure the phosphorylation level of minichromosome maintenance protein 2(MCM2),a member of the DNA unwinding minichromosome maintenance protein complex family,and the expression levels of apoptosis-related proteins.
Results
2
Compared with the control group,the XL413 treatment group had significant reductions in the abilities of colorectal cancer cell proliferation,migration,and colony formation(
P
=0.001 5) and a significant increase in the proportion of cells in the early and late stages of apoptosis(
P
=0.000 6). As for the transcriptional expression level of genes,the XL413 treatment group had a significant reduction in the ratio of the cell apoptosis markers B-cell lymphoma-2(Bcl-2) to Bcl-2-associated X(
P
=0.008 7),and at the protein level,XL413 inhibited the phosphorylation of the DNA unwinding-related protein MCM2 and thus DNA replication and promoted the increase in the expression of apoptosis-related proteins.
Conclusion
2
XL413 can inhibit DNA replication by reducing the phosphorylation of the DNA unwinding-related protein MCM2 and induce the apoptosis of colorectal cancer cells. The study provides a theoretical basis for the application of XL413 in the treatment of colorectal cancer in the future.
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