Genes & Genomics

, Volume 37, Issue 9, pp 737–742 | Cite as

MicroRNA sequencing detects miR-424-5p up-regulation in ovarian cancer stem cells

  • Ji Ho Yun
  • Jisun Lim
  • In Su Ha
  • Ji Min Shin
  • Jung Hoon Kim
  • Jungho Kim
  • Chu Won Nho
  • Yoon Shin Cho
Research Article


Cancer stem cells (CSCs) are cancer cells that possess the ability to undergo continuous proliferation and self-renewal. It has been postulated that CSCs are responsible for tumor growth, heterogeneity, invasion, metastasis, and recurrence. MicroRNAs (miRNAs), small non-coding RNAs of approximately 22 nucleotides, are known to be involved in the maintenance of CSCs. To gain insight into the role of miRNAs in CSCs, we investigated the differential expression of miRNAs in ovarian CSCs compared to non-CSCs. Ovarian CSCs were isolated from the human ovarian cancer cell line SK-OV-3 using two ovarian CSC-specific surface markers, CD44 and CD117. The expression levels of miRNAs in CSCs and non-CSCs were estimated by miRNA sequencing. We detected four up-regulated miRNAs (miR-29a-5p, miR-34c-5p, miR-106a-5p, and miR-424-5p) in ovarian CSCs, and miR-424-5p was validated by real-time qPCR. MiR-424-5p target genes were predicted using several validated target databases and computational algorithms. Pathway analysis indicated that most miR-424-5p target genes are involved in cancer-related biological pathways. Overall, these results suggest that miR-424-5p is a potential regulator of CSCs that endows human ovarian tissue with tumorigenic potential and thus represents a potential therapeutic target for human ovarian cancer.


Ovarian cancer stem cells SK-OV-3 cells microRNA microRNA sequencing 



This research was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (2012M3A9D1054534), the Hallym University Specialization Fund (HRF-S-11), and an intramural grant from the Korea Institute of Science and Technology (2z04381).

Conflict of interest

The authors declare no conflicts of interest.

Ethical statement

In this study, human ovarian cancer cells were obtained from the commercially available human ovary adenocarcinoma (ATCC® HTB-77™). This study was approved by Hallym University Institutional Review Board (HIRB).

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Copyright information

© The Genetics Society of Korea and Springer-Science and Media 2015

Authors and Affiliations

  • Ji Ho Yun
    • 1
    • 2
  • Jisun Lim
    • 3
  • In Su Ha
    • 1
  • Ji Min Shin
    • 1
  • Jung Hoon Kim
    • 2
  • Jungho Kim
    • 2
  • Chu Won Nho
    • 1
  • Yoon Shin Cho
    • 3
  1. 1.Natural Products Research CenterKIST Gangneung Institute of Natural ProductsGangneungRepublic of Korea
  2. 2.Department of Life ScienceSogang UniversitySeoulRepublic of Korea
  3. 3.Department of Biomedical ScienceHallym UniversityChuncheonRepublic of Korea

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