DLEU1 promotes oral squamous cell carcinoma progression by activating interferon-stimulated genes

Autor: Yui Hatanaka, Takeshi Niinuma, Hiroshi Kitajima, Koyo Nishiyama, Reo Maruyama, Kazuya Ishiguro, Mutsumi Toyota, Eiichiro Yamamoto, Masahiro Kai, Akira Yorozu, Shohei Sekiguchi, Kazuhiro Ogi, Hironari Dehari, Masashi Idogawa, Yasushi Sasaki, Takashi Tokino, Akihiro Miyazaki, Hiromu Suzuki
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Druh dokumentu: article
ISSN: 2045-2322
69803730
DOI: 10.1038/s41598-021-99736-5
Popis: Abstract Long noncoding RNAs (lncRNAs) are deeply involved in cancer development. We previously reported that DLEU1 (deleted in lymphocytic leukemia 1) is one of the lncRNAs overexpressed in oral squamous cell carcinoma (OSCC) cells, where it exhibits oncogenic activity. In the present study, we further clarified the molecular function of DLEU1 in the pathogenesis of OSCC. Chromatin immunoprecipitation-sequencing (ChIP-seq) analysis revealed that DLEU1 knockdown induced significant changes in the levels of histone H3 lysine 4 trimethylation (H3K4me3) and H3K27 acetylation (H3K27ac) in OSCC cells. Notably, DLEU1 knockdown suppressed levels of H3K4me3/ H3K27ac and expression of a number of interferon-stimulated genes (ISGs), including IFIT1, IFI6 and OAS1, while ectopic DLEU1 expression activated these genes. Western blot analysis and reporter assays suggested that DLEU1 upregulates ISGs through activation of JAK-STAT signaling in OSCC cells. Moreover, IFITM1, one of the ISGs induced by DLUE1, was frequently overexpressed in primary OSCC tumors, and its knockdown inhibited OSCC cell proliferation, migration and invasion. These findings suggest that DLEU1 exerts its oncogenic effects, at least in part, through activation of a series ISGs in OSCC cells.
Databáze: Directory of Open Access Journals
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