AURKB promotes bladder cancer progression by deregulating the p53 DNA damage response pathway via MAD2L2

© 2024. The Author(s)..

BACKGROUND: Bladder cancer (BC) is the most common urinary tract malignancy. Aurora kinase B (AURKB), a component of the chromosomal passenger protein complex, affects chromosomal segregation during cell division. Mitotic arrest-deficient 2-like protein 2 (MAD2L2) interacts with various proteins and contributes to genomic integrity. Both AURKB and MAD2L2 are overexpressed in various human cancers and have synergistic oncogenic effects; therefore, they are regarded as emerging therapeutic targets for cancer. However, the relationship between these factors and the mechanisms underlying their oncogenic activity in BC remains largely unknown. The present study aimed to explore the interactions between AURKB and MAD2L2 and how they affect BC progression via the DNA damage response (DDR) pathway.

METHODS: Bioinformatics was used to analyze the expression, prognostic value, and pro-tumoral function of AURKB in patients with BC. CCK-8 assay, colony-forming assay, flow cytometry, SA-β-gal staining, wound healing assay, and transwell chamber experiments were performed to test the viability, cell cycle progression, senescence, and migration and invasion abilities of BC cells in vitro. A nude mouse xenograft assay was performed to test the tumorigenesis ability of BC cells in vivo. The expression and interaction of proteins and the occurrence of the senescence-associated secretory phenotype were detected using western blot analysis, co-immunoprecipitation assay, and RT-qPCR.

RESULTS: AURKB was highly expressed and associated with prognosis in patients with BC. AURKB expression was positively correlated with MAD2L2 expression. We confirmed that AURKB interacts with, and modulates the expression of, MAD2L2 in BC cells. AURKB knockdown suppressed the proliferation, migration, and invasion abilities of, and cell cycle progression in, BC cells, inducing senescence in these cells. The effects of AURKB knockdown were rescued by MAD2L2 overexpression in vitro and in vivo. The effects of MAD2L2 knockdown were similar to those of AURKB knockdown. Furthermore, p53 ablation rescued the MAD2L2 knockdown-induced suppression of BC cell proliferation and cell cycle arrest and senescence in BC cells.

CONCLUSIONS: AURKB activates MAD2L2 expression to downregulate the p53 DDR pathway, thereby promoting BC progression. Thus, AURKB may serve as a potential molecular marker and a novel anticancer therapeutic target for BC.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:22

Enthalten in:

Journal of translational medicine - 22(2024), 1 vom: 21. März, Seite 295

Sprache:

Englisch

Beteiligte Personen:

Li, Linzhi [VerfasserIn]
Jiang, Pengcheng [VerfasserIn]
Hu, Weimin [VerfasserIn]
Zou, Fan [VerfasserIn]
Li, Ming [VerfasserIn]
Rao, Ting [VerfasserIn]
Ruan, Yuan [VerfasserIn]
Yu, Weimin [VerfasserIn]
Ning, Jinzhuo [VerfasserIn]
Cheng, Fan [VerfasserIn]

Links:

Volltext

Themen:

AURKB protein, human
Aurora Kinase B
Aurora kinase B
Bladder cancer
EC 2.7.11.1
Journal Article
MAD2L2 protein, human
Mad2 Proteins
Mitotic arrest-deficient 2-like protein 2
P53
TP53 protein, human
Tumor Suppressor Protein p53

Anmerkungen:

Date Completed 25.03.2024

Date Revised 27.03.2024

published: Electronic

Citation Status MEDLINE

doi:

10.1186/s12967-024-05099-6

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM370046854