MiRNA‐516a promotes bladder cancer metastasis by inhibiting MMP9 protein degradation via the AKT/FOXO3A/SMURF1 axis

Clinical and Translational Medicine

Qipeng Xie¹  Yongyong Lu²  Honglei Jin³  Yiting Lyu³  Liping Shen³  Yuanyuan Chang³  Hongyan Li³  Binuo Sun³  Zhijian Zheng³  Ruirui Zhang³  Weiwei Lin³  Haishan Huang³  He Zhao³  Jiugao Ma³  Mengqi Lin³  Shuilian Wu³  Xing Huang⁴  Gang Zhang⁴ 

[1] Department of Clinical Laboratory, The Second Affiliated Hospital and Yuying Children's Hospital Wenzhou Medical University Wenzhou China;The First Affiliated Hospital Wenzhou Medical University Wenzhou China;Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, China, School of Laboratory Medicine and Life Sciences Wenzhou Medical University Wenzhou China;Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, School of Medicine Zhejiang University Hangzhou China;

关键词: bladder cancer;    metastasis;    migration and invasion;    miR‐516a;    PHLPP2;   

DOI  :  10.1002/ctm2.263

来源: DOAJ

【 摘 要 】

Abstract Background Metastasis is the leading cause of death in patients with bladder cancer (BC). However, current available treatments exert little effects on metastatic BC. Moreover, traditional grading and staging have only a limited ability to identify metastatic BC. Accumulating evidence indicates that the aberrant expression of microRNA is intimately associated with tumor progression. So far, many miRNAs have been identified as molecular targets for cancer diagnosis and therapy. This study focused on the role of miR‐516a‐5p (miR‐516a) in BC. Methods MiR‐516a expression and its downstream signaling pathway were detected using molecular cell biology and biochemistry approaches and techniques. Fresh clinical BC tissue was used to study the clinicopathological characteristics of patients with different miR‐516a expression. The biological functions of miR‐516a in BC were tested both in vivo and in vitro. Results A more invasive BC phenotype was significantly and positively correlated with miR‐516a overexpression in BC patients. MiR‐516a inhibition significantly decreased BC cell invasion and migration in vitro and in vivo. Furthermore, miR‐516a attenuated the expression of PH domain leucine‐rich repeat‐containing protein phosphatase 2 protein and inhibited SMAD‐specific E3 ubiquitin protein ligase 1 transcription by activating the AKT/Forkhead box O3 signaling pathway, which stabilized MMP9 and slowed down its proteasomal degradation, ultimately promoting BC motility and invasiveness. Conclusions Our findings reveal the crucial function of miR‐516a in promoting BC metastasis, and elucidate the molecular mechanism involved, suggesting that miR‐516a may be a promising novel diagnostic and therapeutic target for BC.

【 授权许可】

Unknown