Publication date: 20 March 2017
Source:Gene, Volume 605
Author(s): Yejiang Lou, Di Xia, Mengxia Yu, Jianhua Tong, Jie Jin
Interferon regulatory factor-1 (IRF-1) is a member of the interferon regulatory factor family. It acts as a transcriptional activator and plays a critical role in antiviral defense, immune response, cell growth regulation, apoptosis and cell differentiation. Deletions, mutations or aberrant splicing of IRF-1 would result in its functional inactivation, and closely related to the tumorigenesis. In this work, we identified an IRF-1 splicing transcript (IRF-1-s) in all-trans retinoic acid (ATRA)-treated acute promyelocytic leukemia (APL) cell line NB4 cells. It lost the exon 8 and 9 of the full length IRF-1, expressed in numerous cell types and could be induced to expression by ATRA in NB4 cells. It turned out similar biological activity as full length IRF-1 to enhance the transcription of interferon stimulated response element (ISRE)-containing target genes. Identification of IRF-1-s in NB4 cells would be benefit for our further exploring the signaling pathway of ATRA and interferons, as well as the mechanisms of differentiation of APL cells.
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