Mutational landscape and antiproliferative functions of ELF transcription factors in human cancer

Mizuo Ando, Masahito Kawazu, Toshihide Ueno, Daizo Koinuma, Koji Ando, Junji Koya, Keisuke Kataoka, Takahiko Yasuda, Hiroyuki Yamaguchi, Kazutaka Fukumura, Azusa Yamato, Manabu Soda, Eirin Sai, Yoshihiro Yamashita, Takahiro Asakage, Yasushi Miyazaki, Mineo Kurokawa, Kohei Miyazono, Stephen D Nimer, Tatsuya YamasobaHiroyuki Mano

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

ELF4 (also known as MEF) is a member of the ETS family of transcription factors. An oncogenic role for ELF4 has been demonstrated in hematopoietic malignancies, but its function in epithelial tumors remains unclear. Here, we show that ELF4 can function as a tumor suppressor and is somatically inactivated in a wide range of human tumors. We identified a missense mutation affecting the trans activation potential of ELF4 in oral squamous cell carcinoma cells. Restoration of the trans activation activity through introduction of wild-type ELF4 significantly inhibited cell proliferation in vitro and tumor xenograft growth. Furthermore, we found that ELF1 and ELF2, closely related transcription factors to ELF4, also exerted antiproliferative effects in multiple cancer cell lines. Mutations in ELF1 and ELF2, as in ELF4, were widespread across human cancers, but were almost all mutually exclusive. Moreover, chromatin immunoprecipitation coupled with high-throughput sequencing revealed ELF4-binding sites in genomic regions adjacent to genes related to cell-cycle regulation and apoptosis. Finally, we provide mechanistic evidence that the antiproliferative effects of ELF4 were mediated through the induction of HRK, an activator of apoptosis, and DLX3, an inhibitor of cell growth. Collectively, our findings reveal a novel subtype of human cancer characterized by inactivating mutations in the ELF subfamily of proteins, and warrant further investigation of the specific settings where ELF restoration may be therapeutically beneficial.

Original languageEnglish (US)
Pages (from-to)1814-1824
Number of pages11
JournalCancer Research
Volume76
Issue number7
DOIs
StatePublished - Apr 1 2016

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ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Ando, M., Kawazu, M., Ueno, T., Koinuma, D., Ando, K., Koya, J., Kataoka, K., Yasuda, T., Yamaguchi, H., Fukumura, K., Yamato, A., Soda, M., Sai, E., Yamashita, Y., Asakage, T., Miyazaki, Y., Kurokawa, M., Miyazono, K., Nimer, S. D., ... Mano, H. (2016). Mutational landscape and antiproliferative functions of ELF transcription factors in human cancer. Cancer Research, 76(7), 1814-1824. https://doi.org/10.1158/0008-5472.CAN-14-3816