Tumor Biology

, Volume 37, Issue 11, pp 14929–14937 | Cite as

Long non-coding RNA IRAIN suppresses apoptosis and promotes proliferation by binding to LSD1 and EZH2 in pancreatic cancer

  • Yifan Lian
  • Juan Wang
  • Jing Feng
  • Jie Ding
  • Zhonghua Ma
  • Juan Li
  • Peng Peng
  • Wei De
  • Keming Wang
Original Article


Long non-coding RNA (lncRNA) modulates gene expression, while lncRNA dysregulation is associated with human cancer. Furthermore, while recent studies have shown that lncRNA IRAIN plays an important role in other malignancies, the role of IRAIN in pancreatic cancer (PC) progression remains unclear. In this study, we found that upregulation of lncRNA IRAIN was significantly correlated with tumor size, TNM stage, and lymph node metastasis in a cohort of 37 PC patients. In vitro experiments showed that knockdown of IRAIN by small interfering RNA (siRNA) significantly induced cell apoptosis and inhibited cell proliferation in both BxPC-3 and PANC-1 cells. Further mechanism study showed that, by binding to histone demethylase lysine-specific demethylase 1 (LSD1), an enhancer of zeste homolog 2 (EZH2), IRAIN reduced PC tumor cell apoptosis and induced growth arrest by silencing the expression of Kruppel-like factor 2 (KLF2) and P15. Moreover, IRAIN expression was inversely correlated with that of KLF2 and P15 in PC tissues. To our knowledge, this is the first report elucidating the role and mechanism of IRAIN in PC progression.


Pancreatic cancer Apoptosis lncRNA IRAIN LSD1 EZH2 



This work was supported by the Six Talents Peak Project of Jiangsu Province (WSN-050), the Key Project supported by Medical Science and Technology Development Foundation, Nanjing Department of Health (YKK13178), and the Medical Science and Technology Development Foundation, Nanjing Medical University (2014NJMUZD074).

Compliance with ethical standards

Informed consent was obtained from all patients. Our study was approved by the Research Ethics Committee of Nanjing Medical University, China.

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2016

Authors and Affiliations

  • Yifan Lian
    • 1
  • Juan Wang
    • 1
  • Jing Feng
    • 2
  • Jie Ding
    • 1
  • Zhonghua Ma
    • 1
  • Juan Li
    • 1
  • Peng Peng
    • 3
  • Wei De
    • 4
  • Keming Wang
    • 1
  1. 1.Department of Oncology, Second Affiliated HospitalNanjing Medical UniversityNanjingPeople’s Republic of China
  2. 2.Department of OncologyFirst Affiliated Hospital of Nanjing Medical UniversityNanjingPeople’s Republic of China
  3. 3.Department of OncologyThe Second Hospital of NanjingNanjingPeople’s Republic of China
  4. 4.Department of Biochemistry and Molecular BiologyNanjing Medical UniversityNanjingPeople’s Republic of China

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