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<p>Triple-negative breast cancer (TNBC) is characterized by its high aggressiveness and treatment resistance, with limited therapeutic options and especially a lack of effective targeted therapeutic strategies. This study focuses on the role and regulatory mechanisms of super enhancer long non-coding RNA (SE-lncRNA) in TNBC. Through in-depth analysis of TCGA database, we revealed the specific expression pattern of SE-lncRNA in TNBC, and found that downregulation of RP11-54O7.17 was significantly correlated with poor prognosis of TNBC patients, which was experimentally verified. Both in vitro and in vivo results confirmed that RP11-54O7.17 overexpression effectively suppressed the proliferation and metastasis of TNBC. Further exploration showed that RP11-54O7.17 directly interacted with the S100A4 protein through its conserved L2b-type repeat structural fragment, promoted S100A4 binding to HSP70, targeting S100A4 degradation via the autophagy-lysosome pathway, which in turn blocked the activation of S100A4-STAT3 signaling axis. Moreover, RP11-54O7.17 delivered via liposome demonstrated significant anti-TNBC efficacy in an in vivo model without observing significant systemic toxicity. This study elucidates the regulatory role and molecular mechanism of RP11-54O7.17 in TNBC, which provides a strong scientific basis and potential therapeutic targets for the development of novel SE-lncRNA-based therapeutic strategies.</p>

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Super enhancer lncRNA RP11-54O7.17 regulates the proliferation and metastasis of triple-negative breast cancer by targeting lysosomal degradation of S100A4

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月31日

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  • Hongtao Hu,
  • Haoyang Bai,
  • Chen Wang,
  • Luyi Xi,
  • Shasha Tian,
  • Maowei Ni,
  • Jiahui Lu,
  • Hang Gao,
  • Huajun Zhao

摘要

Triple-negative breast cancer (TNBC) is characterized by its high aggressiveness and treatment resistance, with limited therapeutic options and especially a lack of effective targeted therapeutic strategies. This study focuses on the role and regulatory mechanisms of super enhancer long non-coding RNA (SE-lncRNA) in TNBC. Through in-depth analysis of TCGA database, we revealed the specific expression pattern of SE-lncRNA in TNBC, and found that downregulation of RP11-54O7.17 was significantly correlated with poor prognosis of TNBC patients, which was experimentally verified. Both in vitro and in vivo results confirmed that RP11-54O7.17 overexpression effectively suppressed the proliferation and metastasis of TNBC. Further exploration showed that RP11-54O7.17 directly interacted with the S100A4 protein through its conserved L2b-type repeat structural fragment, promoted S100A4 binding to HSP70, targeting S100A4 degradation via the autophagy-lysosome pathway, which in turn blocked the activation of S100A4-STAT3 signaling axis. Moreover, RP11-54O7.17 delivered via liposome demonstrated significant anti-TNBC efficacy in an in vivo model without observing significant systemic toxicity. This study elucidates the regulatory role and molecular mechanism of RP11-54O7.17 in TNBC, which provides a strong scientific basis and potential therapeutic targets for the development of novel SE-lncRNA-based therapeutic strategies.