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Asano K, Tsukada A, Yanagisawa Y, Higuchi M, Takagi K, Ono M, Tanaka T, Tomita K, Yamada K. Melatonin stimulates transcription of the rat phosphoenolpyruvate carboxykinase gene in hepatic cells. FEBS Open Bio 2020; 10:2712-2721. [PMID: 33070478 PMCID: PMC7714082 DOI: 10.1002/2211-5463.13007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/24/2020] [Accepted: 10/16/2020] [Indexed: 12/22/2022] Open
Abstract
Melatonin plays physiological roles in various critical processes, including circadian rhythms, oxidative stress defenses, anti-inflammation responses, and immunity; however, the current understanding of the role of melatonin in hepatic glucose metabolism is limited. In this study, we examined whether melatonin affects gene expression of the key gluconeogenic enzyme, phosphoenolpyruvate carboxykinase (PEPCK). We found that melatonin treatment increased PEPCK mRNA levels in rat highly differentiated hepatoma (H4IIE) cells and primary cultured hepatocytes. In addition, we found that melatonin induction was synergistically enhanced by dexamethasone, whereas it was dominantly inhibited by insulin. We also report that the effect of melatonin was blocked by inhibitors of mitogen-activated protein kinase/extracellular signal-regulated protein kinase (MAPK/ERK), RNA polymerase II, and protein synthesis. Furthermore, the phosphorylated (active) forms of ERK1 and ERK2 (ERK1/2) increased 15 min after melatonin treatment. We performed luciferase reporter assays to show that melatonin specifically stimulated promoter activity of the PEPCK gene. Additional reporter analysis using 5'-deleted constructs revealed that the regulatory regions responsive to melatonin mapped to two nucleotide regions, one between -467 and -398 nucleotides and the other between -128 and +69 nucleotides, of the rat PEPCK gene. Thus, we conclude that melatonin induces PEPCK gene expression via the ERK1/2 pathway at the transcriptional level, and that induction requires de novo protein synthesis.
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Affiliation(s)
- Kosuke Asano
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, Matsumoto, Japan
| | - Akiko Tsukada
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, Matsumoto, Japan
| | - Yuki Yanagisawa
- Matsumoto University Graduate School of Health Science, Matsumoto, Japan
| | - Mariko Higuchi
- Matsumoto University Graduate School of Health Science, Matsumoto, Japan
| | - Katsuhiro Takagi
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, Matsumoto, Japan.,Matsumoto University Graduate School of Health Science, Matsumoto, Japan
| | - Moe Ono
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Japan
| | - Takashi Tanaka
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Japan
| | - Koji Tomita
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Japan
| | - Kazuya Yamada
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, Matsumoto, Japan.,Matsumoto University Graduate School of Health Science, Matsumoto, Japan
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Asano K, Tsukada A, Takagi K, Yamada K. An insulin-inducible transcription factor, SHARP-1, represses transcription of the SIRT1 longevity gene. Biochem Biophys Rep 2020; 22:100743. [PMID: 32072026 PMCID: PMC7013158 DOI: 10.1016/j.bbrep.2020.100743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/27/2020] [Accepted: 01/27/2020] [Indexed: 11/18/2022] Open
Abstract
The rat enhancer of split- and hairy-related protein (SHARP)-1 genes encode insulin-inducible transcriptional repressors. A longevity gene, sirtuin 1 (SIRT1) encodes protein deacetylase. These play an important role in regulating hepatic glucose metabolism. In this study, to evaluate a correlation with these gene expressions, we examined whether SIRT1 effects on expression of the SHARP-1 gene by a treatment with a SIRT1 inhibitor or activator in rat H4IIE hepatoma cells. Whereas the SIRT1 inhibitor increased the level of SHARP-1 mRNA, the SIRT1 activator decreased it. Next, whether SHARP-1 effect on the transcriptional activity of the human SIRT1 gene using luciferase reporter assays was determined. Promoter activity of the SIRT1 gene was specifically repressed by SHARP-1. Further reporter analysis using 5'- deleted or mutated constructs revealed that an E box sequence (5'-CACGTG-3') of the SIRT1 gene promoter was required for the inhibitory effect of SHARP-1. Thus, we conclude that expressions between the SHARP-1 and the SIRT1 genes show a negative correlation and that SHARP-1 represses transcription of the SIRT1 gene.
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Affiliation(s)
- Kosuke Asano
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan
| | - Akiko Tsukada
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan
| | - Katsuhiro Takagi
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan
| | - Kazuya Yamada
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan
- Corresponding author. Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano, 390-1295, Japan.
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Kanai Y, Asano K, Komatsu Y, Takagi K, Ono M, Tanaka T, Tomita K, Haneishi A, Tsukada A, Yamada K. Induction of the SHARP-2 mRNA level by insulin is mediated by multiple signaling pathways. Biosci Biotechnol Biochem 2017; 81:256-261. [DOI: 10.1080/09168451.2016.1249450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Abstract
The rat enhancer of split- and hairy-related protein-2 (SHARP-2) is an insulin-inducible transcription factor which represses transcription of the rat phosphoenolpyruvate carboxykinase gene. In this study, a regulatory mechanism of the SHARP-2 mRNA level by insulin was analyzed. Insulin rapidly induced the level of SHARP-2 mRNA. This induction was blocked by inhibitors for phosphoinositide 3-kinase (PI 3-K), protein kinase C (PKC), and mammalian target of rapamycin (mTOR), actinomycin D, and cycloheximide. Whereas an adenovirus infection expressing a dominant negative form of atypical PKC lambda (aPKCλ) blocked the insulin-induction of the SHARP-2 mRNA level, insulin rapidly activated the mTOR. Insulin did not enhance transcriptional activity from a 3.7 kb upstream region of the rat SHARP-2 gene. Thus, we conclude that insulin induces the expression of the rat SHARP-2 gene at the transcription level via both a PI 3-K/aPKCλ- and a PI 3-K/mTOR- pathways and that protein synthesis is required for this induction.
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Affiliation(s)
- Yukiko Kanai
- Graduate School of Health Science, Matsumoto University, Matsumoto, Japan
| | - Kosuke Asano
- Faculty of Human Health Science, Department of Health and Nutritional Science, Matsumoto University, Matsumoto, Japan
| | - Yoshiko Komatsu
- Graduate School of Health Science, Matsumoto University, Matsumoto, Japan
| | - Katsuhiro Takagi
- Graduate School of Health Science, Matsumoto University, Matsumoto, Japan
- Faculty of Human Health Science, Department of Health and Nutritional Science, Matsumoto University, Matsumoto, Japan
| | - Moe Ono
- Faculty of Pharmacy, Laboratory of Molecular Biology, Osaka Ohtani University, Tondabayashi, Japan
| | - Takashi Tanaka
- Faculty of Pharmacy, Laboratory of Molecular Biology, Osaka Ohtani University, Tondabayashi, Japan
| | - Koji Tomita
- Faculty of Pharmacy, Laboratory of Molecular Biology, Osaka Ohtani University, Tondabayashi, Japan
| | - Ayumi Haneishi
- Faculty of Human Health Science, Department of Health and Nutritional Science, Matsumoto University, Matsumoto, Japan
| | - Akiko Tsukada
- Faculty of Human Health Science, Department of Health and Nutritional Science, Matsumoto University, Matsumoto, Japan
| | - Kazuya Yamada
- Graduate School of Health Science, Matsumoto University, Matsumoto, Japan
- Faculty of Human Health Science, Department of Health and Nutritional Science, Matsumoto University, Matsumoto, Japan
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Komatsu Y, Yanagisawa Y, Moriizumi M, Tsuchiya Y, Yokouchi H, Otsuka H, Aoyagi M, Tsukada A, Kanai Y, Haneishi A, Takagi K, Asano K, Ono M, Tanaka T, Tomita K, Yamada K. 5-Aminoimidazole-4-carboxyamide-1-β-D-ribofranoside stimulates the rat enhancer of split- and hairy-related protein-2 gene via atypical protein kinase C lambda. J Biochem 2015; 159:429-36. [PMID: 26590300 DOI: 10.1093/jb/mvv116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/21/2015] [Indexed: 01/22/2023] Open
Abstract
The 5'-AMP-activated protein kinase (AMPK) functions as a cellular energy sensor. 5-Aminoimidazole-4-carboxyamide-1-β-D-ribofranoside (AICAR) is a chemical activator of AMPK. In the liver, AICAR suppresses expression of thephosphoenolpyruvate carboxykinase(PEPCK) gene. The rat enhancer of split- and hairy-related protein-2 (SHARP-2) is an insulin-inducible transcriptional repressor and its target is thePEPCKgene. In this study, we examined an issue of whether theSHARP-2gene expression is regulated by AICAR via the AMPK. AICAR increased the level of SHARP-2 mRNA in H4IIE cells. Whereas an AMPK inhibitor, compound-C, had no effects on the AICAR-induction, inhibitors for both phosphoinositide 3-kinase (PI 3-K) and protein kinase C (PKC) completely diminished the effects of AICAR. Western blot analyses showed that AICAR rapidly activated atypical PKC lambda (aPKCλ). In addition, when a dominant negative form of aPKCλ was expressed, the induction of SHARP-2 mRNA level by AICAR was inhibited. Calcium ion is not required for the activation of aPKCλ. A calcium ion-chelating reagent had no effects on the AICAR-induction. Furthermore, the AICAR-induction was inhibited by treatment with an RNA polymerase inhibitor or a protein synthesis inhibitor. Thus, we conclude that the AICAR-induction of theSHARP-2gene is mediated at transcription level by a PI 3-K/aPKCλ pathway.
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Affiliation(s)
- Yoshiko Komatsu
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Yuki Yanagisawa
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Maya Moriizumi
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Yuuki Tsuchiya
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Honami Yokouchi
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Hatsumi Otsuka
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Mizuki Aoyagi
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Akiko Tsukada
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Yukiko Kanai
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Ayumi Haneishi
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Katsuhiro Takagi
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan; Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Kosuke Asano
- Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan
| | - Moe Ono
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan; Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiorikita, Tondabayashi, Osaka 584-8540, Japan
| | - Takashi Tanaka
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiorikita, Tondabayashi, Osaka 584-8540, Japan
| | - Koji Tomita
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiorikita, Tondabayashi, Osaka 584-8540, Japan
| | - Kazuya Yamada
- Matsumoto University Graduate School of Health Science, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan; Department of Health and Nutritional Science, Faculty of Human Health Science, Matsumoto University, 2095-1 Niimura, Matsumoto, Nagano 390-1295, Japan;
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