Post-Transcriptional Up-Regulation of PDGF-C by HuR in Advanced and Stressed Breast Cancer

International Journal of Molecular Sciences

Tao Wang¹  Guo-Dong Yang¹  Lin-Tao Jia¹  Ya-Qi Qu²  Ren-Li Li²  Rui Dong²  Nian-An Luo² 

[1] Department of Biochemistry and Molecular Biology, Fourth Military Medical University,Xi'an 710032, China;Department of General Surgery, Tangdu Hospital, Fourth Military Medical University,Xi'an 710032, China;

关键词: breast neoplasms;    HuR;    mRNA stability;    platelet-derived growth factor-C (PDGF-C);   

DOI  :  10.3390/ijms151120306

来源: DOAJ

【 摘 要 】

Breast cancer is a heterogeneous disease characterized by multiple genetic alterations leading to the activation of growth factor signaling pathways that promotecell proliferation. Platelet-derived growth factor-C (PDGF-C) is overexpressed in various malignancies; however, the involvement of PDGF-C in breast cancers and the mechanisms underlying PDGF-C deregulation remain unclear. Here, we show that PDGF-C is overexpressed in clinical breast cancers and correlates with poor prognosis. PDGF-Cup-regulation was mediated by the human embryonic lethal abnormal vision-like protein HuR, which stabilizes the PDGF-C transcript by binding to two predicted AU-rich elements (AREs) in the 3'-untranslated region (3'-UTR). HuR is up-regulated in hydrogen peroxide-treated or ultraviolet-irradiated breast cancer cells. Clinically, HuR levels are correlated with PDGF-C expression and histological grade or pathological tumor-node-metastasis (pTNM) stage. Our findings reveal a novel mechanism underlying HuR-mediated breast cancer progression, and suggest that HuR and PDGF-C are potential molecular candidates for targeted therapy of breast cancers.

【 授权许可】

Unknown