Tumor Biology

, Volume 37, Issue 1, pp 817–822 | Cite as

The adaptor protein CrkII regulates IGF-1-induced biological behaviors of pancreatic ductal adenocarcinoma

  • Rui Liu
  • Qing Wang
  • Guangying Xu
  • Kexin Li
  • Lingli Zhou
  • Baofeng Xu
Original Article


Recently, the adaptor protein CrkII has been proved to function in initiating signals for proliferation and invasion in some malignancies. However, the specific mechanisms underlying insulin-like growth factor 1 (IGF-1)-CrkII signaling-induced proliferation of pancreatic ductal adenocarcinoma (PDAC) were not unraveled. In this work, PDAC tissues and cell lines were subjected to in vitro and in vivo assays. Our findings showed that CrkII was abundantly expressed in PDAC tissues and closely correlated with tumor-node-metastasis (TNM) stage and invasion. When cells were subjected to si-CrkII, si-CrkII inhibited IGF-1-mediated PDAC cell growth. In vitro, we demonstrated the upregulation of CrkII, p-Erk1/2, and p-Akt occurring in IGF-1-treated PDAC cells. Conversely, si-CrkII affected upregulation of CrkII, p-Erk1/2, and p-Akt. In addition, cell cycle and in vivo assay identified that knockdown of CrkII inhibited the entry of G1 into S phase and the increase of PDAC tumor weight. In conclusion, CrkII mediates IGF-1 signaling and further balanced PDAC biological behaviors via Erk1/2 and Akt pathway, which indicates that CrkII gene and protein may act as an effective target for the treatment of PDAC.


CrkII IGF-1 Proliferation Apoptosis PDAC 



This study was supported by grants to BFX from Foundation of Jilin Provincial Science & Technology Department [No. 201201044].

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Rui Liu
    • 1
  • Qing Wang
    • 1
  • Guangying Xu
    • 2
  • Kexin Li
    • 3
  • Lingli Zhou
    • 1
  • Baofeng Xu
    • 4
  1. 1.Department of EndocrinologyChina-Japan Union Hospital of Jilin UniversityChangchunChina
  2. 2.Changchun Emergency CenterChangchunChina
  3. 3.Department of EndocrinologyPeople’s Hospital of Jilin ProvinceChangchunChina
  4. 4.Department of NeurosurgeryFirst Hospital of Jilin UniversityChangchunChina

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