Tumor Biology

, Volume 35, Issue 9, pp 8639–8643 | Cite as

RETRACTED ARTICLE: Nrdp1 inhibits growth of colorectal cancer cells by nuclear retention of p27

  • Hang Lu
  • Hua Li
  • Dong Mao
  • Zhitu Zhu
  • Hongzhi Sun
Research Article


The molecular mechanism underlying the proliferation of colorectal cancer (CRC) cells is not completely understood. Here, we found that the level of neuregulin receptor degradation protein-1 (Nrdp1) E3 ubiquitin ligase was significantly decreased in CRC tissues, compared with the adjacent normal tissues from human patients. Knockdown of Nrdp1 enhanced the proliferation of CRC cells, while overexpression of Nrdp1 inhibited the proliferation of CRC cells. Further analysis showed that Nrdp1 may induce degradation of its target ErbB3 to inhibit activation of both ERK/MAPK and PI3K/Akt pathways in CRC cells, which seemed to affect cell proliferation via nuclear retention of a major cell-cycle inhibitor, p27. Taken together, these findings suggest that Nrdp1-mediated ErbB3 degradation suppresses cellular growth of CRC and that Nrdp1 loss in CRC may promote tumor progression, thus highlighting Nrdp1 as a novel target for CRC therapy.


Neuregulin receptor degradation protein-1 (Nrdp1) ErbB3 Extracellular-related kinase/mitogen-activated protein kinase (ERK/MAPK) Phosphatidylinositol 3-kinase (PI3K) Protein kinase B (Akt) Colorectal cancer 



This work was supported by the internal funding of the First Affiliated Hospital, Liaoning Medical College, China.

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Hang Lu
    • 1
  • Hua Li
    • 2
  • Dong Mao
    • 1
  • Zhitu Zhu
    • 2
  • Hongzhi Sun
    • 1
  1. 1.Department of Gastrointestinal Surgery, the First Affiliated HospitalLiaoning Medical CollegeJinzhouChina
  2. 2.Department of Oncology, the First Affiliated HospitalLiaoning Medical CollegeJinzhouChina

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