PMA-induced dissociation of Ku86 from the promoter causes transcriptional up-regulation of histamine H1 receptor

• Published in: Scientific reports Vol. 2; no. 1; p. 916
• Main Authors: Mizuguchi, Hiroyuki, Miyagi, Kohei, Terao, Takuma, Sakamoto, Noriko, Yamawaki, Yosuke, Adachi, Tsubasa, Ono, Shohei, Sasaki, Yohei, Yoshimura, Yoshiyuki, Kitamura, Yoshiaki, Takeda, Noriaki, Fukui, Hiroyuki
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group 03.12.2012
• Subjects: Allergic rhinitis; Deoxyribonucleic acid; DNA; Gene expression; Gene regulation; Histamine; Poly(ADP-ribose) polymerase; Protein kinase C; Regulatory sequences; Signal transduction; Transcription factors; Up-regulation
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/srep00916

Histamine H1 receptor (H1R) gene is up-regulated in patients with allergic rhinitis, and its expression level strongly correlates with the severity of symptoms. However, the mechanism underlying this remains unknown. Here we report the mechanism of H1R gene up-regulation. The luciferase assay revealed the existence of two promoter regions, A and B1. Two AP-1 and one Ets-1 bound to region A, while Ku86, Ku70, and PARP-1 bound to region B1. Ku86 was responsible for DNA binding and poly(ADP-ribosyl)ated in response to phorbol-12-myristate-13-acetate stimulation, inducing its dissociation from region B1 that is crucial for promoter activity. Knockdown of Ku86 gene enhanced up-regulation of H1R gene expression. Experiments using inhibitors for MEK and PARP-1 indicate that regions A and B1 are downstream regulatory elements of the PKCδ/ERK/PARP-1 signaling pathway. Data suggest a novel mechanism for the up-regulation of H1R gene expression.