Nitroxoline suppresses metastasis in bladder cancer via EGR1/circNDRG1/miR-520h/smad7/EMT signaling pathway

Liangliang Ren, Minxiao Jiang, Dingwei Xue, Huan Wang, Zeyi Lu, Lifeng Ding, Haiyun Xie, Ruyue Wang, Wenqin Luo, Li Xu, Mingchao Wang, Shicheng Yu, Sheng Cheng, Liqun Xia, Haifeng Yu, Peng Huang, Naijin Xu, Gonghui Li

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Bladder cancer is one of the most common and deadly cancer worldwide. Current chemotherapy has shown limited efficacy in improving outcomes for patients. Nitroxoline, an old and widely used oral antibiotic, which was known to treat for urinary tract infection for decades. Recent studies suggested that nitroxoline suppressed the tumor progression and metastasis, especially in bladder cancer. However, the underlying mechanism for antitumor activity of nitroxoline remains unclear. Methods: CircRNA microarray was used to explore the nitroxoline-mediated circRNA expression profile of bladder cancer lines. Transwell and wound-healing assay were applied to evaluate the capacity of metastasis. ChIP assay was chosen to prove the binding of promotor and transcription factor. RNA-pulldown assay was performed to explore the sponge of circRNA and microRNA. Results: We first identified the circNDRG1 (has_circ_0085656) as a novel candidate circRNA. Transwell and wound-healing assay demonstrated that circNDRG1 inhibited the metastasis of bladder cancer. ChIP assay showed that circNDRG1 was regulated by the transcription factor EGR1 by binding the promotor of host gene NDRG1. RNA-pulldown assay proved that circNDRG1 sponged miR-520h leading to the overexpression of smad7, which was a negative regulatory protein of EMT. Conclusions: Our research revealed that nitroxoline may suppress metastasis in bladder cancer via EGR1/circNDRG1/miR-520h/smad7/EMT signaling pathway.

Original languageEnglish
Pages (from-to)5207-5220
Number of pages14
JournalInternational Journal of Biological Sciences
Issue number13
Publication statusPublished - 2022


  • Bladder cancer
  • metastasis circNDRG1
  • microRNA
  • nitroxoline

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Developmental Biology
  • Cell Biology


Dive into the research topics of 'Nitroxoline suppresses metastasis in bladder cancer via EGR1/circNDRG1/miR-520h/smad7/EMT signaling pathway'. Together they form a unique fingerprint.

Cite this