| Autor: |
Kentaro Jingushi, Toshihisa Nakamura, Fumi Takahashi-Yanaga, Etsuko Matsuzaki, Yutaka Watanabe, Tatsuya Yoshihara, Sachio Morimoto, Toshiyuki Sasaguri |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Journal of Pharmacological Sciences, Vol 121, Iss 2, Pp 103-109 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
1347-8613 |
| DOI: |
10.1254/jphs.12204FP |
| Popis: |
Differentiation-inducing factor-1 (DIF-1), a morphogen for Dictyostelium discoideum, inhibits the proliferation of human cancer cell lines by suppressing the Wnt/β-catenin signaling pathway. In this study, we examined the effect of DIF-1 on c-Myc, a target gene product of the Wnt/β-catenin signaling pathway, mainly using HCT-116 colon cancer cells. DIF-1 strongly reduced the amount of c-Myc protein in time- and concentration-dependent manners and reduced c-Myc mRNA expression by inhibiting promoter activity through the TCF binding sites. The effect of DIF-1 on c-Myc was also confirmed using the human cervical cell line HeLa. Pretreatment with the proteasome inhibitor MG132 or glycogen synthase kinase-3β (GSK-3β) inhibitors (LiCl and SB216763) attenuated the effect of DIF-1, suggesting that DIF-1 induced c-Myc protein degradation through GSK-3β activation. Furthermore, we examined whether c-Myc was involved in the anti-proliferative effect of DIF-1 using c-Myc–overexpressing cells and found that c-Myc was associated with the anti-proliferative effect of this compound. These results suggest that DIF-1 inhibits c-Myc expression by inhibiting promoter activity and inducing protein degradation via GSK-3β activation, resulting in the inhibition of cell proliferation. Since c-Myc seems to be profoundly involved in accelerated proliferation of various malignant tumors, DIF-1 may have a potential to develop into a novel anti-cancer agent. Keywords:: c-Myc, Wnt/β-catenin signaling pathway, colon cancer cell, differentiation-inducing factor-1, glycogen synthase kinase-3β |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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