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BMI1 promotes the proliferation and inhibits autophagy of breast cancer cells by activating COPZ1
Chen, Shuming; Li, He; Chen, Siyu; Wang, Bing; Zhang, Kaixiang.
Afiliação
  • Chen, Shuming; Hospital of the Joint Logistics Supports Force. Fujian. China
  • Li, He; Hospital of the Joint Logistics Supports Force. Fujian. China
  • Chen, Siyu; Hospital of the Joint Logistics Supports Force. Fujian. China
  • Wang, Bing; Hospital of the Joint Logistics Supports Force. Fujian. China
  • Zhang, Kaixiang; Hospital of the Joint Logistics Supports Force. Fujian. China
Clin. transl. oncol. (Print) ; 24(11): 2166-2174, noviembre 2022.
Artigo em Inglês | IBECS | ID: ibc-210144
Biblioteca responsável: ES1.1
Localização: ES15.1 - BNCS
ABSTRACT
This study was designed to explore the role of COPZ1 in breast cancer as well as discuss its specific reaction mechanism.MethodsWith the help of RT-qPCR and western blot, the expression of BMI1 and COPZ1 were measured. Then, the proliferation, colony formation and apoptosis were evaluated by CCK-8, colony formation and TUNEL assays, separately. Luciferase reporter assay and ChIP were applied to assess the relative activity of COPZ1 promoter as well as its binding with BMI1. Moreover, western blot was utilized to measure the expression of proliferation-, apoptosis- and autophagy-related proteins.ResultsAccording to GEPIA2 database, COPZ1 was upregulated in breast cancer tissues and was associated with the poor prognosis (P = 0.03). Results obtained from RT-qPCR and western blot verified that COPZ1 expression was greatly increased at both mRNA and protein levels in breast cancer cells as compared to control cells (P < 0.05 or P < 0.001). COPZ1 knockdown inhibited the proliferation, induced the autophagy and promoted the apoptosis of breast cancer cells. HumanTFDB predicted the binding sites of BMI1 and COPZ1. The increased relative luciferase activity of COPZ1 promoter following BMI1 overexpression (P < 0.001) and the binding of BMI1 with COPZ1 promoter indicated that BMI1 could activate COPZ1. Further experiments suggested that the effects of COPZ1 knockdown on the proliferation, apoptosis and autophagy of breast cancer cells were reversed by BMI1 overexpression, implying that BMI1 promoted the proliferation and repressed the autophagy of breast cancer cells via activating COPZ1.ConclusionsTo sum up, BMI1 exhibited promotive effects on the malignant progression of breast cancer through the activation of COPZ1. These findings might offer a preliminary theoretical basis for COPZ1 participation in autophagy in breast cancer cells. (AU)
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Coleções: Bases de dados nacionais / Espanha Base de dados: IBECS Assunto principal: Sincalida / Autofagia / Neoplasias da Mama / Proteínas / Apoptose / MicroRNAs / Proliferação de Células Limite: Humanos Idioma: Inglês Revista: Clin. transl. oncol. (Print) Ano de publicação: 2022 Tipo de documento: Artigo Instituição/País de afiliação: Hospital of the Joint Logistics Supports Force/China
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Coleções: Bases de dados nacionais / Espanha Base de dados: IBECS Assunto principal: Sincalida / Autofagia / Neoplasias da Mama / Proteínas / Apoptose / MicroRNAs / Proliferação de Células Limite: Humanos Idioma: Inglês Revista: Clin. transl. oncol. (Print) Ano de publicação: 2022 Tipo de documento: Artigo Instituição/País de afiliação: Hospital of the Joint Logistics Supports Force/China
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