Novel histone deacetylase inhibitor N25 exerts anti-tumor effects and induces autophagy in human glioma cells by inhibiting HDAC3

Xin Yuan Sun, Yue Qu, An Ran Ni, Gui Xiang Wang, Wei Bin Huang, Zhongping Chen, Zhu Fen Lv, Song Zhang, Holly Lindsay, Sibo Zhao, Xiao Nan Li, Bing Hong Feng*

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

N25, a novel histone deacetylase inhibitor, was created through structural modification of suberoylanilide hydroxamic acid. To evaluate the anti-tumor activity of N25 and clarify its molecular mechanism of inducing autophagy in glioma cells, we investigated its in vitro anti-proliferative effect and in vivo anticancer effect. Moreover, we detected whether N25 induces autophagy in glioma cells by transmission electron microscope and analyzed the protein expression level of HDAC3, Tip60, LC3 in glioma samples by western blot. We additionally analyzed the protein expression level of HDAC3, Tip60, ULK1 (Atg1), and Beclin-1 (Atg6) after treatment with N25 in glioma cells. Our results showed that the anti-tumor activity of N25 in glioma cells is slightly stronger than SAHA both in vitro and in vivo. We found that N25 induced autophagy, and HDAC3 was significantly elevated and Tip60 and LC3 significantly decreased in glioma samples compared with normal brain tissues. Nevertheless, N25 inhibited HDAC3 and up-regulated the protein expression of Tip60, ULK1 (Atg1), and Beclin-1 (Atg6) after treatment of glioma cells with N25. In conclusion, these data suggest that N25 has striking anti-tumor activity in part due to inhibition of HDAC3. Additionally, N25 may induce autophagy through inhibiting HDAC3.

Original languageEnglish (US)
Pages (from-to)75232-75242
Number of pages11
JournalOncotarget
Volume8
Issue number43
DOIs
StatePublished - 2017

Keywords

  • Autophagy
  • Glioma
  • HDAC3
  • Histone deacetylase inhibitor
  • N25

ASJC Scopus subject areas

  • Oncology

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