Clioquinol Increases the Expression of VGF, a Neuropeptide Precursor, Through Induction of c-Fos Expression

Journal of Pharmacological Sciences

Chihiro Yabe-Nishimura¹  Masato Katsuyama²  Kazumi Iwata¹  Misaki Matsumoto¹  Masakazu Ibi¹  Yoichi Ohshima¹ 

[1] Department of Pharmacology, Kyoto Prefectural University of Medicine, Japan;Radioisotope Center, Kyoto Prefectural University of Medicine, Japan

关键词: clioquinol;    subacute myelo-optic neuropathy (SMON);    VGF;    AP-1;    c-Fos;   

DOI  :  10.1254/jphs.13271FP

学科分类：药学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(27)Cited-By(1)Clioquinol was used extensively in the mid-1900s as an amebicide to treat indigestion and diarrhea. It was eventually withdrawn from the market because it was linked to subacute myelo-optic neuropathy (SMON) in Japan. However, the pathogenesis of SMON has not yet been elucidated in detail. As reported previously, we performed a global analysis on human neuroblastoma cells using DNA chips. The global analysis and quantitative PCR demonstrated that the mRNA level of VGF (nonacronymic), the precursor of neuropeptides involved in pain reactions, was significantly increased when SH-SY5Y and IMR-32 neuroblastoma cells were treated with clioquinol. Promoter analyses in SH-SY5Y cells revealed that a region responsive to clioquinol exists between �?1381 and �?1349 of the human VGF gene, which contains an activator protein (AP)-1 site–like sequence. The introduction of mutations at this site significantly reduced clioquinol-induced transcriptional activation. Clioquinol induced the expression of the AP-1 family transcription factors, c-Jun and c-Fos. Electrophoresis mobility shift assays demonstrated that c-Jun and c-Fos could bind to the AP-1 site at �?1374/�?1368 in SH-SY5Y cells treated with clioquinol. RNA interference against c-Fos significantly suppressed clioquinol-induced VGF mRNA expression. These results suggest that the clioquinol-induced expression of c-Fos mediates the induction of VGF expression.

【 授权许可】

Unknown