Androgen receptor knockdown enhances prostate cancer chemosensitivity by down-regulating FEN1 through the ERK/ELK1 signalling pathway.

Xie, Weijie; Li, Shulin; Guo, Huan; Zhang, Jiawei; Tu, Menjiang; Wang, Rui; Lin, Bingling; Wu, Yuqi; Wang, Xiangwei

Xie, Weijie; Li, Shulin; Guo, Huan; Zhang, Jiawei; Tu, Menjiang; Wang, Rui; Lin, Bingling; Wu, Yuqi; Wang, Xiangwei.

Afiliación

Xie W; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.
Li S; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.
Guo H; Department of Urology, Affiliated Hospital of Guangdong Medical University, Guangdong Province, Zhanjiang, People's Republic of China.
Zhang J; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.
Tu M; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.
Wang R; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.
Lin B; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.
Wu Y; Department of Radiology, Peking University Shenzhen Hospital, Shenzhen, People's Republic of China.
Wang X; Department of Urology and Carson International Cancer Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Center, Shenzhen University, Shenzhen, People's Republic of China.

Cancer Med ; 12(14): 15317-15336, 2023 07.

Article en En | MEDLINE | ID: mdl-37326412

RESUMEN

PURPOSE: Flap endonuclease 1 (FEN1) is highly upregulated in prostate cancer and promotes the growth of prostate cancer cells. Androgen receptor (AR) is the most critical determinant of the occurrence, progression, metastasis, and treatment of prostate cancer. However, the effect of FEN1 on docetaxel (DTX) sensitivity and the regulatory mechanisms of AR on FEN1 expression in prostate cancer need to be further studied. METHODS: Bioinformatics analyses were performed using data from the Cancer Genome Atlas and the Gene Expression Omnibus. Prostate cancer cell lines 22Rv1 and LNCaP were used. FEN1 siRNA, FEN1 overexpression plasmid, and AR siRNA were transfected into cells. Biomarker expression was evaluated by immunohistochemistry and Western blotting. Apoptosis and the cell cycle were explored using flow cytometry analysis. Luciferase reporter assay was performed to verify the target relationship. Xenograft assays were conducted using 22Rv1 cells to evaluate the in vivo conclusions. RESULTS: Overexpression of FEN1 inhibited cell apoptosis and cell cycle arrest in the S phase induced by DTX. AR knockdown enhanced DTX-induced cell apoptosis and cell cycle arrest at the S phase in prostate cancer cells, which was attenuated by FEN1 overexpression. In vivo experiments showed that overexpression of FEN1 significantly increased tumour growth and weakened the inhibitory effect of DTX on prostate tumour growth, while AR knockdown enhance the sensitivity of DTX to prostate tumour. AR knockdown resulted in FEN1, pho-ERK1/2, and pho-ELK1 downregulation, and the luciferase reporter assay confirmed that ELK1 can regulate the transcription of FEN1. CONCLUSION: Collectively, our studies demonstrate that AR knockdown improves the DTX sensitivity of prostate cancer cells by downregulating FEN1 through the ERK/ELK1 signalling pathway.

Asunto(s)

Neoplasias de la Próstata; Receptores Androgénicos; Masculino; Humanos; Receptores Androgénicos/genética; Receptores Androgénicos/metabolismo; Sistema de Señalización de MAP Quinasas; Endonucleasas de ADN Solapado/genética; Endonucleasas de ADN Solapado/metabolismo; Proliferación Celular; Línea Celular Tumoral; Neoplasias de la Próstata/tratamiento farmacológico; Neoplasias de la Próstata/genética; Neoplasias de la Próstata/metabolismo; Docetaxel/farmacología; ARN Interferente Pequeño/metabolismo; Proteína Elk-1 con Dominio ets/genética; Proteína Elk-1 con Dominio ets/metabolismo

Palabras clave

MAPK/ERK signalling pathway; androgen receptor; flap endonuclease 1; prostate cancer

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neoplasias de la Próstata / Receptores Androgénicos Límite: Humans / Male Idioma: En Revista: Cancer Med Año: 2023 Tipo del documento: Article Pais de publicación: Estados Unidos

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