DLX2对乳腺癌细胞增殖、迁移、侵袭、凋亡及乳腺癌干细胞特性的影响

doi:10.11904/j.issn.1002-3070.2024.02.003

Abstract

Abstract: Objective The Objective of this study was to explore the key genes regulating the metastasis of breast cancer,determine the effects of DLX2 on proliferation,migration,invasion,and apoptosis of breast cancer cells,and explore the role and mechanism of DLX2 in regulating the characteristics of breast cancer stem cells. Methods A DLX2 gene knockdown breast cancer MCF7 cell line was constructed.The cell viability was detected in breast cancer cells by CCK-8 assay,apoptosis was detected in breast cancer cells by flow cytometry,cell migration and invasive abilities were detected by Transwell assay,the expression of SOX4 protein was detected by immunofluorescence(IF)in breast cancer cells and xenografts,the expression of CD44 and ALDH1 protein was detected in breast cancer cells and xenografts by Western blot,apoptosis was detected in xenografts by TUNEL assay,and the malignancy degree of tumor tissues was assessed by HE staining. Results After knocking down DLX2,the cell viability decreased(P＜0.001),apoptosis increased(P＜0.001),and cell migration and invasion abilities decreased in breast cancer cells(P＜0.05).The results of IF showed that the expression of SOX4 was inhibited.The results of Western blot showed a decrease in the expression of CD44 and ALDH1 proteins in breast cancer cells,which are cellular stemness markers(P＜0.05).In the Balb/c nude mouse breast cancer transplantation tumor model,the volume of xenografts in the sh-DLX2 group was significantly smaller than that in the model group(P＜0.001),the xenografts grew slowly,and the volume and weight of xenografts were also lower than those of the model group(P＜0.05).Apoptosis in the sh-DLX2 group was higher than that in the model group,and the expression of SOX4,CD44 and ALDH1 was consistent with the cellular level,all of which were inhibited(P＜0.05). Conclusion DLX2 inhibits proliferation,migration and invasion of breast cancer cells,promotes apoptosis of breast cancer cells,and regulates the characteristics of breast cancer stem cells through SOX4.

Key words: Breast cancer, DLX2, SOX4, Tumor stemness

CLC Number:

R737.9

MENG Fangang, CHEN Fei, ZHEN Lijun. Effects of DLX2 on proliferation,migration,invasion,apoptosis of breast cancer cells and characteristics of breast cancer stem cells[J]. Journal of Practical Oncology, 2024, 38(2): 88-95.

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URL: http://journal09.magtechjournal.com/Jwk3_syzlxzz/EN/10.11904/j.issn.1002-3070.2024.02.003

http://journal09.magtechjournal.com/Jwk3_syzlxzz/EN/Y2024/V38/I2/88

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Effects of DLX2 on proliferation,migration,invasion,apoptosis of breast cancer cells and characteristics of breast cancer stem cells

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