Pathology & Oncology Research

, Volume 25, Issue 1, pp 341–348 | Cite as

Pim-2 Cooperates with Downstream Factor XIAP to Inhibit Apoptosis and Intensify Malignant Grade in Prostate Cancer

  • Ke RenEmail author
  • Xin Gou
  • Mingzhao Xiao
  • Weiyang He
  • Jian Kang
Original Article


To find the exact downstream effector of Pim-2 pathway in prostate cancer cells, and to determine the means by which it affects prostate cancer. XIAP, Pim-2 and p-eIF4B expressions were detected in PCA and BPH tissues. Then the Pim-2 and XIAP expressions were manipulated using transfection or RNAi in prostatic cells. Finally, Pim-2/eIF4B/XIAP levels were examined in PCA tissues with different clinicopathologic features. XIAP was significantly higher in PCA than in BPH tissues. When Pim-2 was transfected into noncancerous prostate epithelial cells RWPE-1, Pim-2, p-eIF4B and XIAP were all significantly increased and the apoptosis rate was significantly decreased. When XIAP was transfected into RWPE-1 cells, XIAP was significantly increased with no impact on Pim-2, p-eIF4B and the apoptosis rate. When Pim-2 SiRNA was transfected into prostate cancer cells PC-3, Pim-2, p-eIF4B and XIAP were significantly decreased and the apoptosis rate was significantly increased. When XIAP SiRNA was transfected into PC-3 cells, XIAP was significantly decreased with no impact on Pim-2, p-eIF4B and apoptosis rate. Pim-2, p-eIF4B and XIAP were all significantly higher in PCA tissues with GS ≥8 than those with GS ≤7. XIAP is the downstream factor of Pim-2 pathway in prostate cancer cells. Pim-2 and XIAP cooperate in inhibiting the apoptosis of prostate cancer cells. The activation of Pim-2 pathway may predict higher GS in prostate cancer.


Pim-2 XIAP Apoptosis Malignant grade 



National Natural Science Foundation of China (81101945).

Chongqing Municipal Public Health Bureau (2011–2-038).

Chongqing Science and Technology Commission (cstc2016jcjA0099).

Supplementary material

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Copyright information

© Arányi Lajos Foundation 2017

Authors and Affiliations

  1. 1.Department of UrologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingPeople’s Republic of China

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