Medical Oncology

, 33:58 | Cite as

Rap2B promotes cell proliferation, migration and invasion in prostate cancer

  • Jiehui Di
  • Huan Cao
  • Juangjuan Tang
  • Zheng Lu
  • Keyu Gao
  • Zhesi Zhu
  • Junnian ZhengEmail author
Original Paper


Rap2B, a member of the Ras family of small GTP-binding proteins, reportedly presents a high level of expression in various human tumors and plays a significant role in the development of tumor. However, the function of Rap2B in prostate cancer (PCa) remains unclear. We elucidated the stimulative role of Rap2B in PCa cell proliferation, migration and invasion by means of the CCK-8 cell proliferation assay, cell cycle analysis and transwell migration assay. Western blot analysis uncovered that elevated Rap2B leads to increased phosphorylation levels of FAK, suggesting that FAK-dependent pathway might be responsible for the effect of Rap2B on PCa cells migration and invasion. Inversely, FAK-specific inhibitor (PF-573228) can abort Rap2B-induced FAK phosphorylation. In vivo experiment confirmed that Rap2B positively regulated PCa growth and metastasis, as well as the expression of phosphorylated FAK. Collectively, these findings shed light on Rap2B as a potential therapeutic target for PCa.


Rap2B FAK Prostate cancer Migration 



This work was supported by grants from the National Natural Science Foundation of China (No. 81201637) and Natural Science Foundation for colleges and universities in Jiangsu Province (No. 14KJB320023).

Compliance with ethical standards

Conflict of interest

The authors have declared that no competing interests exist.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Jiehui Di
    • 1
  • Huan Cao
    • 1
  • Juangjuan Tang
    • 1
    • 4
  • Zheng Lu
    • 1
  • Keyu Gao
    • 1
  • Zhesi Zhu
    • 1
  • Junnian Zheng
    • 1
    • 2
    • 3
    Email author
  1. 1.Cancer InstituteXuzhou Medical CollegeXuzhouPeople’s Republic of China
  2. 2.Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer InstituteXuzhou Medical CollegeXuzhouPeople’s Republic of China
  3. 3.Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical CollegeXuzhouPeople’s Republic of China
  4. 4.Department of OncologyThe Affiliated Hospital of Xuzhou Medical CollegeXuzhouPeople’s Republic of China

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