Tumor Biology

, Volume 36, Issue 3, pp 1395–1401 | Cite as

Role of miR-155 in drug resistance of breast cancer

  • Dan-dan Yu
  • Meng-meng Lv
  • Wei-xian Chen
  • Shan-liang Zhong
  • Xiao-hui Zhang
  • Lin Chen
  • Teng-fei Ma
  • Jin-hai Tang
  • Jian-hua Zhao


MicroRNAs (miRNAs) are small noncoding RNAs that regulate gene expressions at posttranscriptional level. Growing evidence points to their significant role in the acquisition of drug resistance in cancers. Studies show that miRNAs are often aberrantly expressed in human cancer cells which are associated with tumorigenesis, metastasis, invasiveness, and drug resistance. Breast cancer is the leading cause of cancer-induced death in women. Over the last decades, increasing attention has been paid to the effects of miRNAs on the development of breast cancer drug resistance. Among them, miR-155 takes part in a sequence of bioprocesses that contribute to the development of such drug resistance, including repression of FOXO3a, enhancement of epithelial-to-mesenchymal transition (EMT) and mitogen-activated protein kinase (MAPK) signaling, reduction of RhoA, and affecting the length of telomeres. In this review, we discuss the role of miR-155 in the acquisition of breast cancer drug resistance. This will provide a new way in antiresistance treatment of drug-resistant breast cancer.


MicroRNA miR-155 Drug resistance Breast cancer 



This work has no fund. We thank Shan-Liang Zhong, M.D., and Wei-Xian Chen, PhD, for their discussion and help in revision.

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Dan-dan Yu
    • 1
    • 2
  • Meng-meng Lv
    • 1
    • 2
  • Wei-xian Chen
    • 1
    • 2
  • Shan-liang Zhong
    • 3
  • Xiao-hui Zhang
    • 3
  • Lin Chen
    • 2
  • Teng-fei Ma
    • 3
  • Jin-hai Tang
    • 2
  • Jian-hua Zhao
    • 3
  1. 1.The First Clinical School of Nanjing Medical UniversityNanjingChina
  2. 2.Department of General SurgeryNanjing Medical University Affiliated Cancer Hospital Cancer Institute of Jiangsu ProvinceNanjingChina
  3. 3.Center of Clinical LaboratoryNanjing Medical University Affiliated Cancer Hospital Cancer Institute of Jiangsu ProvinceNanjingChina

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