1区 · 医学
Article
作者: Sun, Wei ; Miyamoto, Shigeki ; Tan, Puay Hoon ; Tan, Tuan Zea ; Lee, Moon Hee ; Mendoz, Earnest ; Lee, Martin B. ; Tan, Patrick ; Miller, Lance D. ; Lim, Yoon Pin ; Thike, Aye Aye ; Zhu, Tao ; Kumar, Alan Prem ; Tergaonkar, Vinay ; Hui, Kam Man ; Goh, Boon Cher ; Lim, Chwee Teck ; Yousef, Einas M. ; Goh, Jen Nee ; Zeng, Qi ; Sen, Yin Ping ; Ong, Hooi Tin ; Lobie, Peter E. ; Gaboury, Louis ; Hay, Hui Sin ; Yip, George Wai-Cheong ; Kong, Xiangjun ; Sethi, Gautam ; Yap, Celestial T. ; Salto-Tellez, Manuel ; Wu, Zhengsheng ; Thiery, Jean Paul ; Lim, See Wee ; Shin, Eun Myoung
Despite advancement in breast cancer treatment, 30% of patients with early breast cancers experience relapse with distant metastasis. It is a challenge to identify patients at risk for relapse; therefore, the identification of markers and therapeutic targets for metastatic breast cancers is imperative. Here, we identified DP103 as a biomarker and metastasis-driving oncogene in human breast cancers and determined that DP103 elevates matrix metallopeptidase 9 (MMP9) levels, which are associated with metastasis and invasion through activation of NF-κB. In turn, NF-κB signaling positively activated DP103 expression. Furthermore, DP103 enhanced TGF-β-activated kinase-1 (TAK1) phosphorylation of NF-κB-activating IκB kinase 2 (IKK2), leading to increased NF-κB activity. Reduction of DP103 expression in invasive breast cancer cells reduced phosphorylation of IKK2, abrogated NF-κB-mediated MMP9 expression, and impeded metastasis in a murine xenograft model. In breast cancer patient tissues, elevated levels of DP103 correlated with enhanced MMP9, reduced overall survival, and reduced survival after relapse. Together, these data indicate that a positive DP103/NF-κB feedback loop promotes constitutive NF-κB activation in invasive breast cancers and activation of this pathway is linked to cancer progression and the acquisition of chemotherapy resistance. Furthermore, our results suggest that DP103 has potential as a therapeutic target for breast cancer treatment.