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Morimoto A, Takasugi N, Pan Y, Kubota S, Dohmae N, Abiko Y, Uchida K, Kumagai Y, Uehara T. Methyl vinyl ketone and its analogs covalently modify PI3K and alter physiological functions by inhibiting PI3K signaling. J Biol Chem 2024; 300:105679. [PMID: 38272219 PMCID: PMC10881440 DOI: 10.1016/j.jbc.2024.105679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 01/12/2024] [Accepted: 01/13/2024] [Indexed: 01/27/2024] Open
Abstract
Reactive carbonyl species (RCS), which are abundant in the environment and are produced in vivo under stress, covalently bind to nucleophilic residues such as Cys in proteins. Disruption of protein function by RCS exposure is predicted to play a role in the development of various diseases such as cancer and metabolic disorders, but most studies on RCS have been limited to simple cytotoxicity validation, leaving their target proteins and resulting physiological changes unknown. In this study, we focused on methyl vinyl ketone (MVK), which is one of the main RCS found in cigarette smoke and exhaust gas. We found that MVK suppressed PI3K-Akt signaling, which regulates processes involved in cellular homeostasis, including cell proliferation, autophagy, and glucose metabolism. Interestingly, MVK inhibits the interaction between the epidermal growth factor receptor and PI3K. Cys656 in the SH2 domain of the PI3K p85 subunit, which is the covalently binding site of MVK, is important for this interaction. Suppression of PI3K-Akt signaling by MVK reversed epidermal growth factor-induced negative regulation of autophagy and attenuated glucose uptake. Furthermore, we analyzed the effects of the 23 RCS compounds with structures similar to MVK and showed that their analogs also suppressed PI3K-Akt signaling in a manner that correlated with their similarities to MVK. Our study demonstrates the mechanism of MVK and its analogs in suppressing PI3K-Akt signaling and modulating physiological functions, providing a model for future studies analyzing environmental reactive species.
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Affiliation(s)
- Atsushi Morimoto
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Nobumasa Takasugi
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Yuexuan Pan
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Sho Kubota
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, Technology Platform Division, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Yumi Abiko
- Graduate School of Biomedical Science, Nagasaki University, Nagasaki, Japan
| | - Koji Uchida
- Laboratory of Food Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yoshito Kumagai
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Takashi Uehara
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.
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2
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Matsuo K, Abiko Y, Yamano S, Matsusue K, Kumagai Y. Activation of HSP90/HSF1 Signaling as an Adaptive Response to an Electrophilic Metabolite of Morphine. Biol Pharm Bull 2023; 46:334-337. [PMID: 36724961 DOI: 10.1248/bpb.b22-00531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Morphinone (MO) is an electrophilic metabolite of morphine that covalently binds to protein thiols, resulting in toxicity in vitro and in vivo. We have previously identified a variety of redox signaling pathways that are activated during electrophilic stress. However, the role of MO in such activation remains unknown. In this study, we examined whether MO could activate heat shock protein (HSP) 90/heat shock factor (HSF) 1 signaling in HepG2 cells. MO exposure caused S-modification of HSP90 (determined using biotin-PEAC5-maleimide labeling) and nuclear translocation of transcription factor HSF1, thereby up-regulating its downstream genes encoding B-cell lymphoma 2-associated anthanogene 3 and heat shock 70 kDa protein 1. However, dihydromorphinone, a non-electrophilic metabolite of morphine, had little effect on HSF1 activation or upregulation of these genes, suggesting that covalent modification plays a role in this process and that the HSP90/HSF1 pathway is a redox-signaled adaptive response to morphine metabolism.
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Affiliation(s)
- Kohei Matsuo
- Faculty of Pharmaceutical Science, Fukuoka University
| | - Yumi Abiko
- Faculty of Medicine, University of Tsukuba.,Graduate School of Biomedical Sciences, Nagasaki University
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3
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Matsuo K, Abiko Y, Yamano S, Toriba A, Matsusue K, Kumagai Y. Activation of the Keap1/Nrf2 Pathway as an Adaptive Response to an Electrophilic Metabolite of Morphine. Biol Pharm Bull 2023; 46:338-342. [PMID: 36724962 DOI: 10.1248/bpb.b22-00543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Morphinone (MO) is an electrophilic metabolite of morphine that covalently binds to protein thiols via its α,β-unsaturated carbonyl group, resulting in toxicity in vitro and in vivo. Our previous studies identified a variety of redox signaling pathways that are activated during electrophilic stress. Here, we examined in vitro activation of a signaling pathway involving Kelch-like ECH-associated protein 1 (Keap1) and nuclear factor erythroid 2-related factor 2 (Nrf2) in response to MO. Exposure of HepG2 cells to MO caused covalent modification of Keap1 thiols (evaluated using biotin-PEAC5-maleimide labeling) and nuclear translocation of Nrf2, thereby up-regulating downstream genes encoding ATP binding cassette subfamily C member 2, solute carrier family 7 member 11, glutamate-cysteine ligase catalytic subunit, glutamate-cysteine ligase modifier subunit, glutathione S-transferase alpha 1, and heme oxygenase 1. However, dihydromorphinone, a metabolite of morphine lacking the reactive C7-C8 double bond, had little effect on Nrf2 activation. These results suggest that covalent modification is crucial in the Keap1/Nrf2 pathway activation and that this pathway is a redox signaling-associated adaptive response to MO metabolism.
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Affiliation(s)
- Kohei Matsuo
- Faculty of Pharmaceutical Science, Fukuoka University
| | - Yumi Abiko
- Faculty of Medicine, University of Tsukuba.,Graduate School of Biomedical Sciences, Nagasaki University
| | | | - Akira Toriba
- Graduate School of Biomedical Sciences, Nagasaki University
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4
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Abiko Y, Taguchi K, Hisamori M, Hiyoshi-Arai K, Luong NC, Toriba A, Kumagai Y. Redox Homeostasis is Disturbed by Redox Cycling between Reactive Cysteines of Thioredoxin 1 and 9,10-Phenanthrenequinone, an Atmospheric Electron Acceptor. Chem Res Toxicol 2022; 35:1425-1432. [PMID: 35862866 DOI: 10.1021/acs.chemrestox.2c00174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
9,10-Phenanthrenequinone (9,10-PQ) is a toxicant in diesel exhaust particles and airborne particulate matter ≤2.5 μm in diameter. It is an efficient electron acceptor that readily reacts with dithiol compounds in vitro, resulting in the oxidation of thiol groups and concomitant generation of reactive oxygen species (ROS). However, it remains to be elucidated whether 9,10-PQ interacts with proximal protein dithiols. In the present study, we used thioredoxin 1 (Trx1) as a model of proteins with reactive proximal cysteines and examined whether it reacts with 9,10-PQ in cells and tissues, thereby affecting its catalytic activity and thiol status. Intratracheal injection of 9,10-PQ into mice resulted in protein oxidation and diminished Trx activity in the lungs. Using recombinant wild-type and C32S/C35S Trx1, we found that Cys32 and Cys35 selectively serve as electron donor sites for redox reactions with 9,10-PQ that lead to substantial inhibition of Trx activity. Addition of dithiothreitol restored the Trx activity inhibited by 9,10-PQ. Exposure of cultured cells to 9,10-PQ caused intracellular reactive oxygen species generation that led to protein oxidation, Trx1 dimerization, p38 phosphorylation, and apoptotic cell death. Overexpression of Trx1 blocked these 9,10-PQ-mediated events. These results suggest that the interaction of the reactive cysteines of Trx1 with 9,10-PQ causes oxidative stress, leading to disruption of redox homeostasis.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Keiko Taguchi
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba, Sendai 980-8575, Japan
| | - Miwa Hisamori
- Master Program in Environmental Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Kyoko Hiyoshi-Arai
- School of Nursing, University of Shizuoka, 52-1 Yada, Shizuoka 422-8526, Japan
| | - Nho Cong Luong
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Akira Toriba
- School of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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5
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Yoshida S, Zhang H, Takahashi R, Yoshida S, Abiko Y, Toriba A. Identification and removal of aflatoxin coprecipitates derived from plant samples on immunoaffinity chromatographic purification. J Chromatogr A 2022; 1678:463382. [DOI: 10.1016/j.chroma.2022.463382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 10/16/2022]
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Luong NC, Abiko Y, Aoki H, Kumagai Y. A Convenient Assay to Detect Protein Oxidation Caused by Redox-Active Quinones. Biol Pharm Bull 2022; 45:798-802. [PMID: 35650106 DOI: 10.1248/bpb.b22-00080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Redox-active quinones generate reactive oxygen species (ROS) through their redox cycling with electron donors. Hydrogen peroxide (H2O2) causes S-oxidation of proteins and is associated with activation of the redox signaling pathway and/or toxicity (Chem. Res. Toxicol., 30, 2017, Kumagai et al.). In the present study, we developed a convenient assay based on a combination of an enzyme-linked immunosorbent assay and a biotin-PEAC5-maleimide assay and used it to determine protein S-oxidation by ROS during redox cycling of 9,10-phenanthrenequinone (9,10-PQ) and pyrroloquinoline quinone (PQQ). S-Oxidation of proteins in a mouse liver supernatant was detected during reaction of 9,10-PQ or PQQ with electron donors such as dithiothreitol or reduced nicotinamide adenine dinucleotide phosphate (NADPH), whereas cellular protein oxidation was not observed in the absence of electron donors. These results suggest that the developed assay is useful for the detection of S-oxidation of proteins.
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Affiliation(s)
- Nho Cong Luong
- Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University
| | - Yumi Abiko
- Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Medicine, University of Tsukuba
| | - Hanako Aoki
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yoshito Kumagai
- Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Medicine, University of Tsukuba
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7
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Horai S, Abiko Y, Unoki T, Shinkai Y, Akiyama M, Nakata K, Kunisue T, Kumagai Y. Concentrations of nucleophilic sulfur species in small Indian mongoose (Herpestes auropunctatus) in Okinawa, Japan. Chemosphere 2022; 295:133833. [PMID: 35120952 DOI: 10.1016/j.chemosphere.2022.133833] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/27/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Reactive sulfur species (RSS), such as hydrogen per (poly)sulfide, cysteine per (poly)sulfide, glutathione per (poly)sulfide, and protein-bound per (poly)sulfides, can easily react with environmental electrophiles such as methylmercury (MeHg), because of their high nucleophilicity. These RSS are produced by enzymes such as cystathionine β-synthase (CBS) and cystathionine γ-lyase (CSE) and are found in mammalian organs. Organs of wildlife have not been analyzed for hydrogen sulfide, cysteine, glutathione, and RSS. In this study, low molecular weight nucleophilic sulfur substances, including RSS, were quantified by stable isotope dilution assay-based liquid chromatography-mass spectrometry using β-(4-hydroxyphenyl)ethyl iodoacetamide to capture the target chemicals in the small Indian mongoose which species possesses high mercury content as same as some marine mammals. Western blotting revealed that the mongoose organs (liver, kidney, cerebrum, and cerebellum) contained proteins that cross-reacted with anti-CBS and CSE antibodies. The expression patterns of these enzymes were similar to those in mice, indicating that mongoose organs contain CBS and CSE. Moreover, bis-methylmercury sulfide (MeHg)2S, which is a low toxic compound in comparison to MeHg, was found in the liver of this species. These results suggest that the small Indian mongoose produces RSS and monothiols associated with detoxification of electrophilic organomercury. The animals which have high mercury content in their bodies may have function of mercury detoxification involved not only Se but also RSS interactions.
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Affiliation(s)
- Sawako Horai
- Environmental Health Section, Department of Environment and Public Health, National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan.
| | - Yumi Abiko
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Takamitsu Unoki
- Hygienic Chemistry Section, Department of Basic Medical Sciences, National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan.
| | - Yasuhiro Shinkai
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan.
| | - Katsushi Nakata
- Nansei Environmental Laboratory Co., Ltd., 4-4 Agarizaki, Nishihara, Okinawa, 903-0105, Japan.
| | - Tatsuya Kunisue
- Center for Marine Environmental Studies, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan.
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
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8
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Abiko Y, Kurosawa K, Yamakawa H, Kumagai Y. Activation of PTP1B/EGFR signaling and cytotoxicity during combined exposure to ambient electrophiles in A431 cells. J Toxicol Sci 2021; 46:177-185. [PMID: 33814511 DOI: 10.2131/jts.46.177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Chemical modification of the thiol group on protein tyrosine phosphatase (PTP) 1B triggers an activation of epidermal growth factor receptor (EGFR) signaling that is mimicked by environmental electrophiles through S-modification of PTP1B. While activation of PTP1B/EGFR by a single exposure to an electrophile has been established, the effects of combined exposure to electrophiles are unknown. Here, we examined the activation of EGFR signaling by combined exposure to ambient electrophiles in human epithelial carcinoma A431 cells. Simultaneous exposure to 1,2- and 1,4-naphthoquinone (NQ) augmented the S-modification of endogenous and recombinant human PTP1B (hPTP1B). Combined exposure of hPTP1B or A431 cells to 1,2- and 1,4-NQ escalated the inactivation of PTP compared with individual exposure. Phosphorylation of EGFR and its downstream kinase extracellular signal-regulated kinase (ERK) 1/2 by 1,2-NQ exposure was facilitated by simultaneous exposure to 1,2-NQ with 10 µM 1,4-NQ. An EGFR inhibitor diminished the phosphorylation of ERK1/2, indicating that ERK was phosphorylated following EGFR activation by the NQ cocktail. The combined exposure to NQs also accelerated cell death in A431 cells compared with each NQ alone. While no EGFR/ERK activation was seen following 1,4-benzoquinone (BQ) treatment, exposure to 1,4-NQ in the presence of 1,4-BQ increased 1,4-NQ-mediated activation of EGFR. This suggests that the enhancement of 1,4-NQ-dependent EGFR activation by 1,4-BQ is caused by a different mechanism than 1,2-NQ with 1,4-NQ. These results suggest that combined exposure to ambient electrophiles, even at low concentrations, can induce stronger activation of redox signaling than individual exposure. Our findings indicate that combining different electrophiles may produce unexpected effects.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba
| | - Kohki Kurosawa
- Master's Program of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Hiroto Yamakawa
- Master's Program of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba.,Master's Program of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Abiko Y, Katayama Y, Zhao W, Horai S, Sakurai K, Kumagai Y. The fate of methylmercury through the formation of bismethylmercury sulfide as an intermediate in mice. Sci Rep 2021; 11:17598. [PMID: 34475444 PMCID: PMC8413320 DOI: 10.1038/s41598-021-96579-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/13/2021] [Indexed: 11/10/2022] Open
Abstract
A previous study by our group indicated that methylmercury (MeHg) is biotransformed to bismethylmercury sulfide [(MeHg)2S)] by interaction with reactive sulfur species (RSS) produced in the body. In the present study, we explored the transformation of MeHg to (MeHg)2S in the gut and the subsequent fate of (MeHg)2S in vitro and in vivo. An ex vivo experiment suggested the possibility of the extracellular transformation of MeHg to (MeHg)2S in the distal colon, and accordingly, the MeHg sulfur adduct was detected in the intestinal contents and feces of mice administered MeHg, suggesting that (MeHg)2S is formed through reactions between MeHg and RSS in the gut. In a cell-free system, we found that (MeHg)2S undergoes degradation in a time-dependent manner, resulting in the formation of mercury sulfide and dimethylmercury (DMeHg), as determined by X-ray diffraction and gas chromatography/mass spectrometry, respectively. We also identified DMeHg in the expiration after the intraperitoneal administration of (MeHg)2S to mice. Thus, our present study identified a new fate of MeHg through (MeHg)2S as an intermediate, which leads to conversion of volatile DMeHg in the body.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yusuke Katayama
- Master's Program in Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Wenyang Zhao
- Doctoral Program in Materials Science and Engineering, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-0006, Japan.,National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047, Japan
| | - Sawako Horai
- Environmental Health Section, Department Environment and Public Health, National Institute for Minamata Disease, Minamata, Kumamoto, 867-0008, Japan
| | - Kenji Sakurai
- Doctoral Program in Materials Science and Engineering, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-0006, Japan.,National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047, Japan
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan. .,Master's Program in Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan.
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Abiko Y, Katayama Y, Akiyama M, Kumagai Y. Lipophilic compounds in garlic decrease the toxicity of methylmercury by forming sulfur adducts. Food Chem Toxicol 2021; 150:112061. [PMID: 33587975 DOI: 10.1016/j.fct.2021.112061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 01/26/2021] [Accepted: 02/09/2021] [Indexed: 12/28/2022]
Abstract
Garlic (Allium sativum L.) contains numerous sulfur compounds. We have previously found that reactive sulfur species such as glutathione persulfide, glutathione polysulfide, protein-bound persulfides, and hydrogen sulfide can bind to methylmercury to give bismethylmercury sulfide, which is less toxic than methylmercury. It was not clear, however, whether such reactive sulfur species are present in garlic. The aim of the study presented here was to determine whether garlic contains reactive sulfur species that can bind to methylmercury. We extracted garlic with organic solvents and then performed silica gel column chromatography to separate constituents that could cause bismethylmercury sulfide to form. We found numerous garlic constituents could bind to methylmercury to form bismethylmercury sulfide. A hexane extract of garlic decreased methylmercury cytotoxicity in vitro and body weight loss in mice. The results suggest that ingesting garlic may decrease methylmercury toxicity by causing the formation of sulfur adducts that inhibit adverse reactions.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yusuke Katayama
- Master's Program in Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
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Abiko Y, Aoki H, Kumagai Y. Effect of combined exposure to environmental aliphatic electrophiles from plants on Keap1/Nrf2 activation and cytotoxicity in HepG2 cells: A model of an electrophile exposome. Toxicol Appl Pharmacol 2021; 413:115392. [PMID: 33428920 DOI: 10.1016/j.taap.2020.115392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 12/24/2020] [Accepted: 12/30/2020] [Indexed: 11/25/2022]
Abstract
Electrophiles, ubiquitously found in the environment, modify thiol groups of sensor proteins, leading to activation of redox signaling pathways such as the Kelch-like ECH-associated protein 1 (Keap1)/nuclear factor E2 related factor 2 (Nrf2) pathway. Nrf2 activation by exposure to single electrophiles has been established. However, the effect of exposure to a combination of electrophiles on Nrf2 activation has not been well evaluated. The current study examined whether combined exposure to electrophiles enhances the modification of thiol groups and Keap1/Nrf2 activation in HepG2 cells. Six electrophiles [1,2-naphthoquinone (1,2-NQ), 1,4-NQ, 1,4-benzoquinone, (E)-2-hexenal (hexenal), (E)-2-decenal, and (E)-2-butenal] were tested for S-modification of albumin in vitro and for cytotoxicity to HepG2 cells. Interestingly, a mixture of the electrophiles enhanced S-modification of albumin and cytotoxicity compared with exposure to each electrophile separately. Herein, we focused on 1,2-NQ, 1,4-NQ, and hexenal to clarify the combined effect of electrophiles on Keap1/Nrf2 activation in HepG2 cells. A concentration addition model revealed that 1,2-NQ and/or 1,4-NQ additively enhanced hexenal-mediated S-modification of GSH in vitro, whereas the cytotoxicity of hexenal was synergistically increased by simultaneous exposure of HepG2 cells to the NQs. Furthermore, an NQ cocktail (2.5 μM each) that does not activate Nrf2 enhanced hexenal-mediated Nrf2 activation. These results suggest that combined exposure to electrophiles at low concentrations induces stronger activation of redox signaling compared with exposure to each electrophile alone and worsens their cytotoxicity.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human, Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Hanako Aoki
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human, Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human, Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
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12
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Nakahara K, Hamada K, Tsuchida T, Takasugi N, Abiko Y, Shien K, Toyooka S, Kumagai Y, Uehara T. Covalent N-arylation by the pollutant 1,2-naphthoquinone activates the EGF receptor. J Biol Chem 2021; 296:100524. [PMID: 33705793 PMCID: PMC8050034 DOI: 10.1016/j.jbc.2021.100524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 03/01/2021] [Accepted: 03/05/2021] [Indexed: 11/28/2022] Open
Abstract
The epidermal growth factor receptor (EGFR) is the most intensively investigated receptor tyrosine kinase. Several EGFR mutations and modifications have been shown to lead to abnormal self-activation, which plays a critical role in carcinogenesis. Environmental air pollutants, which are associated with cancer and respiratory diseases, can also activate EGFR. Specifically, the environmental electrophile 1,2-naphthoquinone (1,2-NQ), a component of diesel exhaust particles and particulate matter more generally, has previously been shown to impact EGFR signaling. However, the detailed mechanism of 1,2-NQ function is unknown. Here, we demonstrate that 1,2-NQ is a novel chemical activator of EGFR but not other EGFR family proteins. We found that 1,2-NQ forms a covalent bond, in a reaction referred to as N-arylation, with Lys80, which is in the ligand-binding domain. This modification activates the EGFR-Akt signaling pathway, which inhibits serum deprivation-induced cell death in a human lung adenocarcinoma cell line. Our study reveals a novel mode of EGFR pathway activation and suggests a link between abnormal EGFR activation and environmental pollutant-associated diseases such as cancer.
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Affiliation(s)
- Kengo Nakahara
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Kyohei Hamada
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Tomoki Tsuchida
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Nobumasa Takasugi
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Yumi Abiko
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kazuhiko Shien
- Department of Thoracic, Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shinichi Toyooka
- Department of Thoracic, Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takashi Uehara
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.
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13
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Abiko Y, Okada M, Aoki H, Mizokawa M, Kumagai Y. A strategy for repression of arsenic toxicity through nuclear factor E2 related factor 2 activation mediated by the (E)-2-alkenals in Coriandrum sativum L. leaf extract. Food Chem Toxicol 2020; 145:111706. [DOI: 10.1016/j.fct.2020.111706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 12/15/2022]
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14
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Xiong B, Shirai K, Matsumoto K, Abiko Y, Furuichi Y. The potential of a surface pre-reacted glass root canal dressing for treating apical periodontitis in rats. Int Endod J 2020; 54:255-267. [PMID: 32961600 DOI: 10.1111/iej.13414] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 09/14/2020] [Indexed: 12/27/2022]
Abstract
AIM To evaluate the efficacy of a prototype root canal dressing containing surface pre-reacted glass-ionomer (S-PRG) fillers on repairing induced periapical lesions in a rat model. Calcium hydroxide [Ca(OH)2 ] was applied as a comparison in the healing process. METHODOLOGY The pulp chambers of the maxillary first molars in 64 male Wistar rats aged 16 weeks were opened to induce periapical lesions. After 28 days, the mesial canal of each tooth was prepared, irrigated with 2.5% sodium hypochlorite only (control group: irrigation) or followed by the respective dressing [Ca(OH)2 group, irrigation + Ca(OH)2 ; S-PRG group, irrigation + S-PRG] and restored with composite resin for 3 or 7 days (10/group). Four rats with healthy molars were used as blank controls. Descriptive analysis of the periapical radiographs, haematoxylin and eosin staining and immunohistochemical observation was performed 3 and 7 days after treatment. The periapical grey value, CD68 macrophages and osteoclasts (cathepsin-K) were quantified and statistically analysed with Tukey's honest significant difference test. A significant difference was achieved when P values were <0.05. RESULTS S-PRG and Ca(OH)2 dressings were associated with increased periapical grey values and inhibited osteoclast activity at 3 and 7 days; a significant difference in radiographic results and the number of osteoclasts was obtained at 3 and 7 days compared with the control group (P < 0.05). Reparative tissue was observed histologically in the space of the periapical resorbed necrotic area after S-PRG and Ca(OH)2 treatment for 3 and 7 days. The number of macrophages was significantly decreased at 3 and 7 days in the S-PRG and Ca(OH)2 specimens when compared with the controls (P < 0.05). CONCLUSIONS In a rat experimental model, the S-PRG root canal dressing was comparable to Ca(OH)2 in promoting the healing of experimentally induced periapical lesions. S-PRG paste has the potential to be used as an alternative intracanal dressing in teeth with apical periodontitis.
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Affiliation(s)
- B Xiong
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - K Shirai
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - K Matsumoto
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Y Abiko
- Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Y Furuichi
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
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15
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Luong NC, Abiko Y, Shibata T, Uchida K, Warabi E, Suzuki M, Noguchi T, Matsuzawa A, Kumagai Y. Redox cycling of 9,10-phenanthrenequinone activates epidermal growth factor receptor signaling through S-oxidation of protein tyrosine phosphatase 1B. J Toxicol Sci 2020; 45:349-363. [PMID: 32493877 DOI: 10.2131/jts.45.349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
9,10-Phenanthrenequinone (9,10-PQ) is a polycyclic aromatic hydrocarbon quinone contaminated in diesel exhaust particles and particulate matter 2.5. It is an efficient electron acceptor that induces redox cycling with electron donors, resulting in excessive reactive oxygen species and oxidized protein production in cells. The current study examined whether 9,10-PQ could activate epidermal growth factor receptor (EGFR) signaling in A431 cells through S-oxidation of its negative regulators such as protein tyrosine phosphatase (PTP) 1B. 9,10-PQ oxidized recombinant human PTP1B at Cys215 and inhibited its catalytic activity, an effect that was blocked by catalase (CAT), whereas cis-9,10-dihydroxy-9,10-dihydrophenanthrene (DDP), which lacks redox cycling activity, had no effect on PTP1B activity. Exposure of A431 cells to 9,10-PQ, but not DDP, activated signaling through EGFR and its downstream extracellular signal-regulated kinase 1/2 (ERK1/2), coupled with a decrease of cellular PTP activity. Immunoprecipitation and UPLC-MSE revealed that PTP1B easily undergoes oxidation during exposure of A431 cells to 9,10-PQ. Pretreatment with polyethylene glycol conjugated with CAT (PEG-CAT) abolished 9,10-PQ-generated H2O2 production and significantly blocked the activation of EGFR-ERK1/2 signaling by 9,10-PQ, indicating the involvement of H2O2 in the activation because scavenging agents for hydroxyl radicals had no effect on the redox signal activation. These results suggest that such an air pollutant producing H2O2, activates EGFR-ERK1/2 signaling, presumably through the S-oxidation of PTPs such as PTP1B, and activation of the signal cascade may contribute, at least in part, to cellular responses in A431 cells.
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Affiliation(s)
- Nho Cong Luong
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Vietnam
| | - Yumi Abiko
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Medicine, University of Tsukuba
| | | | - Koji Uchida
- Graduate School of Bioagricultural Sciences, Nagoya University.,Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | - Eiji Warabi
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Medicine, University of Tsukuba
| | - Midori Suzuki
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | - Takuya Noguchi
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | | | - Yoshito Kumagai
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Faculty of Medicine, University of Tsukuba
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16
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Zheng F, Gonçalves FM, Abiko Y, Li H, Kumagai Y, Aschner M. Redox toxicology of environmental chemicals causing oxidative stress. Redox Biol 2020; 34:101475. [PMID: 32336668 PMCID: PMC7327986 DOI: 10.1016/j.redox.2020.101475] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/18/2020] [Accepted: 02/20/2020] [Indexed: 12/17/2022] Open
Abstract
Living organisms are surrounded with heavy metals such as methylmercury, manganese, cobalt, cadmium, arsenic, as well as pesticides such as deltamethrin and paraquat, or atmospheric pollutants such as quinone. Extensive studies have demonstrated a strong link between environmental pollutants and human health. Redox toxicity is proposed as one of the main mechanisms of chemical-induced pathology in humans. Acting as both a sensor of oxidative stress and a positive regulator of antioxidants, the nuclear factor erythroid 2-related factor 2 (NRF2) has attracted recent attention. However, the role NRF2 plays in environmental pollutant-induced toxicity has not been systematically addressed. Here, we characterize NRF2 function in response to various pollutants, such as metals, pesticides and atmospheric quinones. NRF2 related signaling pathways and epigenetic regulations are also reviewed.
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Affiliation(s)
- Fuli Zheng
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou, Fujian, 350122, China; Department of Molecular Pharmacology, Albert Einstein College of Medicine, Forchheimer 209, 1300 Morris Park Avenue, Bronx, NY, 10461, United States.
| | - Filipe Marques Gonçalves
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Forchheimer 209, 1300 Morris Park Avenue, Bronx, NY, 10461, United States
| | - Yumi Abiko
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, 305-8575, Japan
| | - Huangyuan Li
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou, Fujian, 350122, China.
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, 305-8575, Japan.
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Forchheimer 209, 1300 Morris Park Avenue, Bronx, NY, 10461, United States.
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17
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Kobayashi F, Uehara O, Ito C, Furusawa M, Abiko Y, Muramatsu T. DNA methylation of GJA1, BMP2 and BMP4 in a human cementoblast cell line induced by lipopolysaccharide. Int Endod J 2020; 53:804-811. [PMID: 32011747 DOI: 10.1111/iej.13275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 01/30/2020] [Accepted: 01/30/2020] [Indexed: 11/26/2022]
Abstract
AIM To examine DNA methylation of GJA1, BMP2 and BMP4 in human cementoblasts (HCEM) induced by lipopolysaccharide (LPS). METHODOLOGY HCEM were cultured in osteoinduction medium. After 24 h, Escherichia coli LPS (1 μg/mL) was added to the medium, which was changed every 2-3 days. Untreated samples were used as controls. Messenger RNA was extracted after 4 weeks, and quantitative real-time polymerase chain reaction (qRT-PCR) for GJA1, BMP2, BMP4 and DNMT1 was performed. Genomic DNA was extracted after 4 weeks, and quantitative methylation-specific polymerase chain reaction was carried out for GJA1, BMP2 and BMP4. To detect mineralization, alizarin red and alkaline phosphatase staining were performed. The cells were also treated with the DNA methyltransferase inhibitor 5-Aza-2'-deoxycytidine (5Aza) and examined. The significance of differences amongst groups was assessed using a two-way analysis of variance (ANOVA) followed by Bonferroni's multiple comparison test with P < 0.05 being significant. RESULTS Decreased expression of mRNA was seen in GJA1, BMP2 and BMP4 after 4 weeks (P < 0.05). DNA hypermethylation was detected in GJA1, BMP2 and BMP4 (P < 0.05). Alizarin red staining and alkaline phosphatase staining revealed decreased mineralization levels in HCEM stimulated with LPS. 5Aza abolished the effects of DNA methylation in HCEM stimulated with LPS. CONCLUSIONS These results suggest that long-term LPS stimulation induces DNA methylation of GJA1, BMP2 and BMP4 in HCEM.
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Affiliation(s)
- F Kobayashi
- Department of Endodontics, Tokyo Dental College, Tokyo, Japan
| | - O Uehara
- Division of Disease Control and Molecular Epidemiology, Department of Oral Growth and Development, Health Sciences University of Hokkaido, Tobetsu, Japan
| | - C Ito
- Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
| | - M Furusawa
- Department of Endodontics, Tokyo Dental College, Tokyo, Japan
| | - Y Abiko
- Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu, Japan
| | - T Muramatsu
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
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18
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Dóka É, Ida T, Dagnell M, Abiko Y, Luong NC, Balog N, Takata T, Espinosa B, Nishimura A, Cheng Q, Funato Y, Miki H, Fukuto JM, Prigge JR, Schmidt EE, Arnér ESJ, Kumagai Y, Akaike T, Nagy P. Control of protein function through oxidation and reduction of persulfidated states. Sci Adv 2020; 6:eaax8358. [PMID: 31911946 PMCID: PMC6938701 DOI: 10.1126/sciadv.aax8358] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 11/05/2019] [Indexed: 05/17/2023]
Abstract
Irreversible oxidation of Cys residues to sulfinic/sulfonic forms typically impairs protein function. We found that persulfidation (CysSSH) protects Cys from irreversible oxidative loss of function by the formation of CysSSO1-3H derivatives that can subsequently be reduced back to native thiols. Reductive reactivation of oxidized persulfides by the thioredoxin system was demonstrated in albumin, Prx2, and PTP1B. In cells, this mechanism protects and regulates key proteins of signaling pathways, including Prx2, PTEN, PTP1B, HSP90, and KEAP1. Using quantitative mass spectrometry, we show that (i) CysSSH and CysSSO3H species are abundant in mouse liver and enzymatically regulated by the glutathione and thioredoxin systems and (ii) deletion of the thioredoxin-related protein TRP14 in mice altered CysSSH levels on a subset of proteins, predicting a role for TRP14 in persulfide signaling. Furthermore, selenium supplementation, polysulfide treatment, or knockdown of TRP14 mediated cellular responses to EGF, suggesting a role for TrxR1/TRP14-regulated oxidative persulfidation in growth factor responsiveness.
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Affiliation(s)
- É. Dóka
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, 1122 Budapest, Hungary
| | - T. Ida
- Department of Environmental Medicine and Molecular Toxicology, Tohoku University Graduate School of Medicine, 980-8575 Sendai, Japan
| | - M. Dagnell
- Department of Medical Biochemistry and Biophysics, Division of Biochemistry, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Y. Abiko
- Environmental Biology Section, Faculty of Medicine, University of Tsukuba, 305-8575 Tsukuba, Japan
| | - N. C. Luong
- Environmental Biology Section, Faculty of Medicine, University of Tsukuba, 305-8575 Tsukuba, Japan
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen, Hue, Vietnam
| | - N. Balog
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, 1122 Budapest, Hungary
| | - T. Takata
- Department of Environmental Medicine and Molecular Toxicology, Tohoku University Graduate School of Medicine, 980-8575 Sendai, Japan
| | - B. Espinosa
- Department of Medical Biochemistry and Biophysics, Division of Biochemistry, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - A. Nishimura
- Department of Environmental Medicine and Molecular Toxicology, Tohoku University Graduate School of Medicine, 980-8575 Sendai, Japan
| | - Q. Cheng
- Department of Medical Biochemistry and Biophysics, Division of Biochemistry, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Y. Funato
- Department of Cellular Regulation, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - H. Miki
- Department of Cellular Regulation, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - J. M. Fukuto
- Department of Chemistry, Sonoma State University, Rohnert Park, Sonoma, CA 94928, USA
| | - J. R. Prigge
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA
| | - E. E. Schmidt
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA
| | - E. S. J. Arnér
- Department of Medical Biochemistry and Biophysics, Division of Biochemistry, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Y. Kumagai
- Environmental Biology Section, Faculty of Medicine, University of Tsukuba, 305-8575 Tsukuba, Japan
| | - T. Akaike
- Department of Environmental Medicine and Molecular Toxicology, Tohoku University Graduate School of Medicine, 980-8575 Sendai, Japan
| | - P. Nagy
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, 1122 Budapest, Hungary
- Corresponding author.
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19
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Luong NC, Abiko Y, Shibata T, Uchida K, Warabi E, Suzuki M, Noguchi T, Matsuzawa A, Kumagai Y. Redox cycling of 9,10-phenanthrenequinone activates epidermal growth factor receptor signaling through <i>S</i>-oxidation of protein tyrosine phosphatase 1B. J Toxicol Sci 2020; 45:807. [DOI: 10.2131/jts.45.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Nho Cong Luong
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University
| | - Yumi Abiko
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
- Faculty of Medicine, University of Tsukuba
| | | | - Koji Uchida
- Graduate School of Bioagricultural Sciences, Nagoya University
- Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | - Eiji Warabi
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
- Faculty of Medicine, University of Tsukuba
| | - Midori Suzuki
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | - Takuya Noguchi
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | | | - Yoshito Kumagai
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
- Faculty of Medicine, University of Tsukuba
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20
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Tu TTH, Abiko Y, Toyofuku A. Mental health disorders. Br Dent J 2019; 227:1010. [DOI: 10.1038/s41415-019-1054-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Abiko Y, Nakai Y, Luong NC, Bianco CL, Fukuto JM, Kumagai Y. Interaction of Quinone-Related Electron Acceptors with Hydropersulfide Na 2S 2: Evidence for One-Electron Reduction Reaction. Chem Res Toxicol 2019; 32:551-556. [PMID: 30719914 DOI: 10.1021/acs.chemrestox.8b00158] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We previously reported that 9,10-phenanthraquinone (9,10-PQ), an atmospheric electron acceptor, undergoes redox cycling with dithiols as electron donors, resulting in the formation of semiquinone radicals and monothiyl radicals; however, monothiols have little reactivity. Because persulfide and polysulfide species are highly reducing, we speculate that 9,10-PQ might undergo one-electron reduction with these reactive sulfides. In the present study, we explored the redox cycling capability of a variety of quinone-related electron acceptors, including 9,10-PQ, during interactions with the hydropersulfide Na2S2 and its related polysulfides. No reaction occurred when 9,10-PQ was incubated with Na2S; however, when 5 μM 9,10-PQ was incubated with either 250 μM Na2S2 or Na2S4, we detected extensive consumption of dissolved oxygen (84 μM). Under these conditions, both the semiquinone radicals of 9,10-PQ and their thiyl radical species were also detected using ESR, suggesting that a redox cycle reaction occurred utilizing one-electron reduction processes. Notably, the perthiyl radicals remained stable even under aerobic conditions. Similar phenomenon has also been observed with other electron acceptors, such as pyrroloquinoline quinone, vitamin K3, and coenzyme Q10. Our experiments with N-methoxycarbonyl penicillamine persulfide (MCPSSH), a precursor for endogenous cysteine persulfide, suggested the possibility of a redox coupling reaction with 9,10-PQ inside cells. Our study indicates that hydropersulfide and its related polysulfides are efficient electron donors that interact with quinones. Redox coupling reactions between quinoid electron acceptors and such highly reactive thiols might occur in biological systems.
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Affiliation(s)
- Yumi Abiko
- Environmental Biology Section, Faculty of Medicine , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan
| | - Yumi Nakai
- JEOL Resonance Inc. , Tokyo 196-8558 , Japan
| | - Nho C Luong
- Graduate School of Comprehensive Human Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan.,Faculty of Pharmacy , Hue University of Medicine and Pharmacy , 06 Ngo Quyen , Hue , Vietnam
| | - Christopher L Bianco
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Jon M Fukuto
- Sonoma State University , Rohnert Park , California 94928 , United States
| | - Yoshito Kumagai
- Environmental Biology Section, Faculty of Medicine , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8575 , Japan
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22
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Kumagai Y, Abiko Y, Cong NL. Chemical toxicology of reactive species in the atmosphere: two decades of progress in an electron acceptor and an electrophile. J Toxicol Sci 2017; 41:SP37-SP47. [PMID: 28003638 DOI: 10.2131/jts.41.sp37] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Air pollutants such as diesel exhaust particles (DEP) are thought to cause pulmonary diseases such as asthma as a result of oxidative stress. While DEP contain a large number of polycyclic aromatic hydrocarbons, we have focused on 9,10-phenanthrenequinone (9,10-PQ) and 1,2-naphthoquinone (1,2-NQ) because of their chemical properties based on their oxidative and chemical modification capabilities. We have found that 9,10-PQ interacts with electron donors such as NADPH (in the presence of enzymes) and dithiols, resulting in generation of excess reactive oxygen species (ROS) through redox cycling. We have also shown that 1,2-NQ is able to modify protein thiols, leading to protein adducts associated with activation of redox signal transduction pathways at lower concentrations and toxicity at higher concentrations. In this review, we briefly introduce our findings from the last two decades.
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23
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Abiko Y, Lin FY, Lee H, Puga A, Kumagai Y. Quinone-mediated induction of cytochrome P450 1A1 in HepG2 cells through increased interaction of aryl hydrocarbon receptor with aryl hydrocarbon receptor nuclear translocator. J Toxicol Sci 2017; 41:775-781. [PMID: 27853106 DOI: 10.2131/jts.41.775] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
While it has long been believed that benzenes and naphthalenes are unable to activate the aryl hydrocarbon receptor (AhR) because they are poor ligands, we recently reported that these quinoid metabolites upregulated cytochrome P450 1A1 (CYP1A1) in Hepa1c1c7 cells (Abiko et al., 2015). In the current study, AhR activation, measured with a bioluminescence-based cell free assay, was induced by 1,2-naphthoquinone (1,2-NQ), a metabolite of naphthalene. Consistent with this, 1,4-benzoquinone (1,4-BQ), tert-butyl-1,4-BQ, and 1,4-NQ, as well as 1,2-NQ, all electrophilic mono- and bi-cyclic quinones, upregulated CYP1A1 mRNA and protein in HepG2 cells, whereas their parent aromatic hydrocarbons had little effect. Furthermore, immunofluorescence analysis confirmed that these quinones enhanced translocation of AhR to the nucleus.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba
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24
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Abiko Y, Sha L, Shinkai Y, Unoki T, Luong NC, Tsuchiya Y, Watanabe Y, Hirose R, Akaike T, Kumagai Y. 1,4-Naphthoquinone activates the HSP90/HSF1 pathway through the S-arylation of HSP90 in A431 cells: Negative regulation of the redox signal transduction pathway by persulfides/polysulfides. Free Radic Biol Med 2017; 104:118-128. [PMID: 28049024 DOI: 10.1016/j.freeradbiomed.2016.12.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 11/08/2016] [Accepted: 12/30/2016] [Indexed: 12/13/2022]
Abstract
The current consensus is that environmental electrophiles activate redox signal transduction pathways through covalent modification of sensor proteins with reactive thiol groups at low concentrations, while they cause cell damage at higher concentrations. We previously exposed human carcinoma A431 cells to the atmospheric electrophile 1,4-naphthoquinone (1,4-NQ) and found that heat shock protein 90 (HSP90), a negative regulator of heat shock factor 1 (HSF1), was a target of 1,4-NQ. In the study presented here, we determined whether 1,4-NQ activates HSF1. We also examined whether such redox signaling could be regulated by nucleophilic sulfur species. Exposure of A431 cells to 1,4-NQ covalently modified cellular HSP90, resulting in repression of the association between HSF1 with HSP90, thereby enhancing HSF1 translocation into the nuclei. Liquid chromatography-tandem mass spectrometry analysis with recombinant HSP90 revealed that the modifications site were Cys412 and Cys564. We found that HSF1 activation mediated by 1,4-NQ upregulated downstream genes, such as HSPA6. HSF1 knockdown accelerated 1,4-NQ-mediated cytotoxicity in the cells. While simultaneous treatment with reactive persulfide and polysulfide, Na2S2 and Na2S4, blocked 1,4-NQ-dependent protein modification and HSF1 activation in A431 cells, the knockdown of Cys persulfide producing enzymes cystathionine β-synthase (CBS) and/or cystathionine γ-lyase (CSE) enhanced these phenomena. 1,4-NQ-thiol adduct and 1,4-NQ-S-1,4-NQ adduct were produced during the enzymatic reaction of recombinant CSE in the presence of 1,4-NQ. The results suggest that activation of the HSP90-HSF1 signal transduction pathway mediated by 1,4-NQ protects cells against 1,4-NQ and that per/polysulfides can diminish the reactivity of 1,4-NQ by forming sulfur adducts.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Liang Sha
- Leading Graduate School Doctoral Program, Ph.D. Program in Human Biology, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Yasuhiro Shinkai
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Leading Graduate School Doctoral Program, Ph.D. Program in Human Biology, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Takamitsu Unoki
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Nho Cong Luong
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Yukihiro Tsuchiya
- Laboratory of Pharmacology, Showa Pharmaceutical University, Tokyo 194-8543, Japan
| | - Yasuo Watanabe
- Laboratory of Pharmacology, Showa Pharmaceutical University, Tokyo 194-8543, Japan
| | - Reiko Hirose
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Takaaki Akaike
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Leading Graduate School Doctoral Program, Ph.D. Program in Human Biology, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
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Kumagai Y, Abiko Y. Environmental Electrophiles: Protein Adducts, Modulation of Redox Signaling, and Interaction with Persulfides/Polysulfides. Chem Res Toxicol 2016; 30:203-219. [DOI: 10.1021/acs.chemrestox.6b00326] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yoshito Kumagai
- Environmental Biology Section, Faculty
of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Yumi Abiko
- Environmental Biology Section, Faculty
of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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Kumagai Y, Unoki T, Abiko Y, Toyama T. Methylmercury activates and disrupts the Akt/CREB/Bcl-2 signal transduction pathway in SH-SY5Y cells. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Toyama T, Abiko Y, Katayama Y, Kaji T, Kumagai Y. S-Mercuration of ubiquitin carboxyl-terminal hydrolase L1 through Cys152 by methylmercury causes inhibition of its catalytic activity and reduction of monoubiquitin levels in SH-SY5Y cells. J Toxicol Sci 2016; 40:887-93. [PMID: 26558469 DOI: 10.2131/jts.40.887] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Methylmercury (MeHg) is an environmental electrophile that covalently modifies cellular proteins. In this study, we identified proteins that undergo S-mercuration by MeHg. By combining two-dimensional SDS-PAGE, atomic absorption spectrometry and ultra performance liquid chromatography mass spectrometry (UPLC/MS/MS), we revealed that ubiquitin carboxyl-terminal hydrolase L1 (UCH-L1) is a target for S-mercuration in human neuroblastoma SH-SY5Y cells exposed to MeHg (1 µM, 9 hr). The modification site of UCH-L1 by MeHg was Cys152, as determined by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. MeHg was shown to inhibit the catalytic activity of recombinant human UCH-L1 in a concentration-dependent manner. Knockdown of UCH-L1 indicated that this enzyme plays a critical role in regulating mono-ubiquitin (monoUb) levels in SH-SY5Y cells and exposure of SH-SY5Y cells to MeHg caused a reduction in the level of monoUb in these cells. These observations suggest that UCH-L1 readily undergoes S-mercuration by MeHg through Cys152 and this covalent modification inhibits UCH-L1, leading to the potential disruption of the maintenance of cellular monoUb levels.
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Abstract
Highly reactive quinone species produced by photooxidation and/or metabolic activation of mono- or bi-aromatic hydrocarbons modulate cellular homeostasis and electrophilic signal transduction pathways through the covalent modification of proteins. Polycyclic aromatic hydrocarbons, but not mono- or bi-aromatic hydrocarbons, are well recognized as ligands for the aryl hydrocarbon receptor (AhR). However, quinone species produced from mono- and bi-aromatic hydrocarbons could potentially cause AhR activation. To clarify the AhR response to mono- and bi-aromatic hydrocarbon quinones, we studied Cyp1a1 (cytochrome P450 1A1) induction and AhR activation by these quinones. We detected Cyp1a1 induction during treatment with quinones in Hepa1c1c7 cells, but not their parent compounds. Nine of the twelve quinones with covalent binding capability for proteins induced Cyp1a1. Cyp1a1 induction mediated by 1,2-naphthoquinone (1,2-NQ), 1,4-NQ, 1,4-benzoquinone (1,4-BQ) and tert-butyl-1,4-BQ was suppressed by a specific AhR inhibitor and was not observed in c35 cells, which do not have a functional AhR. These quinones stimulated AhR nuclear translocation and interaction with the AhR nuclear translocator. Interestingly, 1,2-NQ covalently modified AhR, which was detected by an immunoprecipitation assay using a specific antibody against 1,2-NQ, resulting in enhancement of xenobiotic responsive element (XRE)-derived luciferase activity and binding of AhR to the Cyp1a1 promoter region. While mono- and bi-aromatic hydrocarbons are generally believed to be poor ligands for AhR and hence unable to induce Cyp1a1, our study suggests that the quinones of these molecules are able to modify AhR and activate the AhR/XRE pathway, thereby inducing Cyp1a1. Since we previously reported that 1,2-NQ and tert-butyl-1,4-BQ also activate NF-E2-related factor 2, it seems likely that some of quinones are bi-functional inducers for phase-I and phase-II reaction of xenobiotics.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba
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Takai R, Uehara O, Harada F, Utsunomiya M, Chujo T, Yoshida K, Sato J, Nishimura M, Chiba I, Abiko Y. DNA hypermethylation of extracellular matrix-related genes in human periodontal fibroblasts induced by stimulation for a prolonged period with lipopolysaccharide derived from Porphyromonas gingivalis. J Periodontal Res 2015; 51:508-17. [DOI: 10.1111/jre.12330] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/05/2015] [Indexed: 12/25/2022]
Affiliation(s)
- R. Takai
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - O. Uehara
- Division of Disease Control and Molecular Epidemiology; Department of Oral Growth and Development; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - F. Harada
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - M. Utsunomiya
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - T. Chujo
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - K. Yoshida
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - J. Sato
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - M. Nishimura
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - I. Chiba
- Division of Disease Control and Molecular Epidemiology; Department of Oral Growth and Development; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
| | - Y. Abiko
- Division of Oral Medicine and Pathology; Department of Human Biology and Pathophysiology; Health Sciences University of Hokkaido; Ishikari-Tobetsu Hokkaido Japan
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Abiko Y, Ishii I, Kamata S, Tsuchiya Y, Watanabe Y, Ihara H, Akaike T, Kumagai Y. Formation of Sulfur Adducts of N-Acetyl-p-benzoquinoneimine, an Electrophilic Metabolite of Acetaminophen in Vivo: Participation of Reactive Persulfides. Chem Res Toxicol 2015; 28:1796-802. [DOI: 10.1021/acs.chemrestox.5b00245] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yumi Abiko
- Environmental
Biology Section, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai,
Tsukuba, Ibaraki 305-8575, Japan
| | - Isao Ishii
- Department
of Biochemistry, Keio University Graduate School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Shotaro Kamata
- Department
of Biochemistry, Keio University Graduate School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Yukihiro Tsuchiya
- Laboratory
of Pharmacology, Showa Pharmaceutical University, Tokyo 194-8543, Japan
| | - Yasuo Watanabe
- Laboratory
of Pharmacology, Showa Pharmaceutical University, Tokyo 194-8543, Japan
| | - Hideshi Ihara
- Department
of Biological Science, Graduate School of Science, Osaka Prefecture University, Osaka 599-8531, Japan
| | - Takaaki Akaike
- Department
of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Yoshito Kumagai
- Environmental
Biology Section, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai,
Tsukuba, Ibaraki 305-8575, Japan
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Abiko Y, Yoshida E, Ishii I, Fukuto JM, Akaike T, Kumagai Y. Involvement of reactive persulfides in biological bismethylmercury sulfide formation. Chem Res Toxicol 2015; 28:1301-6. [PMID: 25874357 DOI: 10.1021/acs.chemrestox.5b00101] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bismethylmercury sulfide (MeHg)2S has been found to be a detoxified metabolite of methylmercury (MeHg) that is produced by SH-SY5Y cells and in livers of rats exposed to MeHg. (MeHg)2S could be formed through the interactions between MeHg and sulfur species such as hydrogen sulfide (H2S or HS(-)), but the origin of its sulfur has not been fully identified. We herein examined the formation of (MeHg)2S through interactions between MeHg and persulfides, polysulfides, and protein preparations. Investigations using HPLC/atomic absorption spectrophotometry and EI-MS revealed that NaHS and Na2S4 react readily with MeHg to give (MeHg)2S, and similar results were found using GSH persulfide (GSSH) formed endogenously or generated enzymatically in vitro. (MeHg)2S was also formed by incubation of MeHg with liver and heart cytosolic fractions prepared from wild-type mice but not with those from mice lacking cystathionine γ-lyase (CSE) that catalyzes the formation of cysteine persulfide. Consistent with this, (MeHg)2S was detected in a variety of tissues taken from wild-type mice intraperitoneally injected with MeHg in vivo but not in those from MeHg-injected CSE knockout mice. By separating liver fractions by column chromatography, we found numerous proteins that contain persulfides: one of the proteins was identified as being glutathione S-transferase pi 1. These results indicate that the formation of (MeHg)2S can be attributed to interactions between MeHg and endogenous free persulfide species, as well as protein-bound cysteine persulfide.
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Affiliation(s)
| | | | - Isao Ishii
- §Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Jon M Fukuto
- ∥Department of Chemistry, Sonoma State University, Rohnert Park, California 94928, United States
| | - Takaaki Akaike
- ⊥Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
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Shinkai Y, Abiko Y, Ida T, Miura T, Kakehashi H, Ishii I, Nishida M, Sawa T, Akaike T, Kumagai Y. Reactive Sulfur Species-Mediated Activation of the Keap1-Nrf2 Pathway by 1,2-Naphthoquinone through Sulfenic Acids Formation under Oxidative Stress. Chem Res Toxicol 2015; 28:838-47. [PMID: 25807370 DOI: 10.1021/tx500416y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Sulfhydration by a hydrogen sulfide anion and electrophile thiolation by reactive sulfur species (RSS) such as persulfides/polysulfides (e.g., R-S-SH/R-S-Sn-H(R)) are unique reactions in electrophilic signaling. Using 1,2-dihydroxynaphthalene-4-thioacetate (1,2-NQH2-SAc) as a precursor to 1,2-dihydroxynaphthalene-4-thiol (1,2-NQH2-SH) and a generator of reactive oxygen species (ROS), we demonstrate that protein thiols can be modified by a reactive sulfenic acid to form disulfide adducts that undergo rapid cleavage in the presence of glutathione (GSH). As expected, 1,2-NQH2-SAc is rapidly hydrolyzed and partially oxidized to yield 1,2-NQ-SH, resulting in a redox cycling reaction that produces ROS through a chemical disproportionation reaction. The sulfenic acid forms of 1,2-NQ-SH and 1,2-NQH2-SH were detected by derivatization experiments with dimedone. 1,2-NQH2-SOH modified Keap1 at Cys171 to produce a Keap1-S-S-1,2-NQH2 adduct. Subsequent exposure of A431 cells to 1,2-NQ or 1,2-NQH2-SAc caused an extensive chemical modification of cellular proteins in both cases. Protein adduction by 1,2-NQ through a thio ether (C-S-C) bond slowly declined through a GSH-dependent S-transarylation reaction, whereas that originating from 1,2-NQH2-SAc through a disulfide (C-S-S-C) bond was rapidly restored to the free protein thiol in the cells. Under these conditions, 1,2-NQH2-SAc activated Nrf2 and upregulated its target genes, which were enhanced by pretreatment with buthionine sulfoximine (BSO), to deplete cellular GSH. Pretreatment of catalase conjugated with poly(ethylene glycol) suppressed Nrf2 activation by 1,2-NQH2-SAc. These results suggest that RSS-mediated reversible electrophilic signaling takes place through sulfenic acids formation under oxidative stress.
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Affiliation(s)
- Yasuhiro Shinkai
- †Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,¶Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Yumi Abiko
- †Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,¶Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Tomoaki Ida
- ‡Laboratory of Environmental Health Sciences, Tohoku University School of Medicine, 2-1 Seiryo-cho, Aoba-ku, Sendai 980-8575, Japan
| | - Takashi Miura
- †Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Hidenao Kakehashi
- †Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Isao Ishii
- §Department of Biochemistry, Graduate School of Pharmaceutical Sciences, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Motohiro Nishida
- ∥Division of Cardiocirculatory Signaling, Okazaki Institute for Integrative Bioscience, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan
| | - Tomohiro Sawa
- ⊥Department of Microbiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Takaaki Akaike
- ‡Laboratory of Environmental Health Sciences, Tohoku University School of Medicine, 2-1 Seiryo-cho, Aoba-ku, Sendai 980-8575, Japan
| | - Yoshito Kumagai
- †Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,¶Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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Ishii I, Kamata S, Hagiya Y, Abiko Y, Kasahara T, Kumagai Y. Protective effects of hydrogen sulfide anions against acetaminophen-induced hepatotoxicity in mice. J Toxicol Sci 2015; 40:837-41. [DOI: 10.2131/jts.40.837] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Isao Ishii
- Department of Biochemistry, Keio University Graduate School of Pharmaceutical Sciences
| | - Shotaro Kamata
- Department of Biochemistry, Keio University Graduate School of Pharmaceutical Sciences
| | - Yoshifumi Hagiya
- Department of Biochemistry, Keio University Graduate School of Pharmaceutical Sciences
| | - Yumi Abiko
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Tadashi Kasahara
- Department of Biochemistry, Keio University Graduate School of Pharmaceutical Sciences
| | - Yoshito Kumagai
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine, University of Tsukuba
| | - Nho Cong Luong
- Master’s Program of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yoshito Kumagai
- Master’s Program of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
- Faculty of Medicine, University of Tsukuba
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Hagiya Y, Kamata S, Mitsuoka S, Okada N, Yoshida S, Yamamoto J, Ohkubo R, Abiko Y, Yamada H, Akahoshi N, Kasahara T, Kumagai Y, Ishii I. Hemizygosity of transsulfuration genes confers increased vulnerability against acetaminophen-induced hepatotoxicity in mice. Toxicol Appl Pharmacol 2014; 282:195-206. [PMID: 25499718 DOI: 10.1016/j.taap.2014.11.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 11/25/2014] [Accepted: 11/26/2014] [Indexed: 12/27/2022]
Abstract
The key mechanism for acetaminophen hepatotoxicity is cytochrome P450 (CYP)-dependent formation of N-acetyl-p-benzoquinone imine, a potent electrophile that forms protein adducts. Previous studies revealed the fundamental role of glutathione, which binds to and detoxifies N-acetyl-p-benzoquinone imine. Glutathione is synthesized from cysteine in the liver, and N-acetylcysteine is used as a sole antidote for acetaminophen poisoning. Here, we evaluated the potential roles of transsulfuration enzymes essential for cysteine biosynthesis, cystathionine β-synthase (CBS) and cystathionine γ-lyase (CTH), in acetaminophen hepatotoxicity using hemizygous (Cbs(+/-) or Cth(+/-)) and homozygous (Cth(-/-)) knockout mice. At 4 h after intraperitoneal acetaminophen injection, serum alanine aminotransferase levels were highly elevated in Cth(-/-) mice at 150 mg/kg dose, and also in Cbs(+/-) or Cth(+/-) mice at 250 mg/kg dose, which was associated with characteristic centrilobular hepatocyte oncosis. Hepatic glutathione was depleted while serum malondialdehyde accumulated in acetaminophen-injected Cth(-/-) mice but not wild-type mice, although glutamate-cysteine ligase (composed of catalytic [GCLC] and modifier [GCLM] subunits) became more activated in the livers of Cth(-/-) mice with lower Km values for Cys and Glu. Proteome analysis using fluorescent two-dimensional difference gel electrophoresis revealed 47 differentially expressed proteins after injection of 150 mg acetaminophen/kg into Cth(-/-) mice; the profiles were similar to 1000 mg acetaminophen/kg-treated wild-type mice. The prevalence of Cbs or Cth hemizygosity is estimated to be 1:200-300 population; therefore, the deletion or polymorphism of either transsulfuration gene may underlie idiosyncratic acetaminophen vulnerability along with the differences in Cyp, Gclc, and Gclm gene activities.
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Affiliation(s)
- Yoshifumi Hagiya
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Shotaro Kamata
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Saya Mitsuoka
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Norihiko Okada
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Saori Yoshida
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Junya Yamamoto
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Rika Ohkubo
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Yumi Abiko
- Environmental Biology Laboratory, School of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Hidenori Yamada
- Jobu Hospital for Respiratory Diseases, Maebashi 371-0048, Japan
| | - Noriyuki Akahoshi
- Department of Immunology, Akita University Graduate School of Medicine, Akita 010-8543, Japan
| | - Tadashi Kasahara
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, School of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Isao Ishii
- Department of Biochemistry, Keio University School of Pharmaceutical Sciences, Tokyo 105-8512, Japan.
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Abiko Y, Mizokawa M, Kumagai Y. Activation of the Kelch-like ECH-associated protein 1 (Keap1)/NF-E2-related factor 2 (Nrf2) pathway through covalent modification of the 2-alkenal group of aliphatic electrophiles in Coriandrum sativum L. J Agric Food Chem 2014; 62:10936-10944. [PMID: 25307732 DOI: 10.1021/jf5030592] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Phytochemicals able to activate the transcription factor NF-E2-related factor 2 (Nrf2) were isolated from an extract of Coriandrum sativum L. (C. sativum) leaves by preparative octadecyl silica column chromatography. Ultraperformance liquid chromatography and liquid chromatography-tandem mass spectrometry analysis of the isolated components after derivatization with 2-diphenylacetyl-1,3-inandione-1-hydrazone and experiments with HepG2 cells revealed that (E)-2-alkenals with different carbon numbers play a role in Nrf2 activation in these cells. Such Nrf2 activation appears to be attributable to S-alkylation of Kelch-like ECH-associated protein 1 (Keap1), the negative regulator for Nrf2, as determined by a biotin-PEAC5-maleimide assay. Interestingly, (E)-2-butenal caused Keap1 modification and Nrf2 activation, whereas butanal did not. These results suggest that (E)-2-alkenals with an α,β-unsaturated aldehyde moiety, which is a common substituent in phytochemicals isolated from C. sativum leaves, activate the Keap1/Nrf2 pathway associated with cellular protection.
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Affiliation(s)
- Yumi Abiko
- Faculty of Medicine and ‡Masters Program in Environmental Sciences, Graduate School of Environmental Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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Abstract
Methylmercury (MeHg) reacts readily with GSH, leading to the formation of a MeHg-SG adduct that is excreted into extracellular space through multidrug-resistance-associated protein (MRP), which is regulated by the transcription factor Nrf2. We previously reported that MeHg covalently modifies Keap1 and activates Nrf2 in human neuroblastoma SH-SY5Y cells. In the study presented here, we examined whether the MeHg-SG adduct could also modulate the Keap1-Nrf2 pathway because the formation of the Hg-S bond is believed to be reversible in the presence of a nucleophile. SH-SY5Y cells exposed to the synthetic ethyl monoester of the MeHg-SG adduct (which is hydrolyzed by cellular esterase(s) to give the MeHg-SG adduct) exhibited a concentration-dependent cellular toxicity that was enhanced by pretreatment with a specific MRP inhibitor. As expected, the MeHg-SG adduct was able to modify cellular proteins in the SH-SY5Y cells and purified Keap1. We also found that this prodrug, as well as MeHg, causes the cellular Keap1 in the cells to be modified, resulting in Nrf2 activation and, thereby, the upregulation of the downstream genes. These results suggest that the MeHg-SG adduct is not electrophilic but that it modifies protein thiols (including Keap1) through S-transmercuration and that rapid Nrf2-dependent excretion of the MeHg-SG adduct is essential in decreasing the cytotoxicity of MeHg.
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Affiliation(s)
- Eiko Yoshida
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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Affiliation(s)
- Y Abiko
- University of Biochemistry, Nihon University School of Dentistry at Matsudo - Biochemistry, 2-870-1, Sakaecho-Nishi, Matsudo, Chiba 271-8587, Japan
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Nagano K, Abiko Y, Yoshida Y, Yoshimura F. Genetic and antigenic analyses of Porphyromonas gingivalis FimA fimbriae. Mol Oral Microbiol 2013; 28:392-403. [PMID: 23809984 DOI: 10.1111/omi.12032] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2013] [Indexed: 12/29/2022]
Abstract
The periodontal pathogen Porphyromonas gingivalis generally expresses two distinct fimbriae, FimA and Mfa1, which play a role in biofilm formation. The fimA gene that encodes FimA fimbrilin is polymorphic, and polymerase chain reaction analysis has identified six genotypes called types I-V and Ib. We found recently that fimbriae exhibit antigenic heterogeneity among the genotypes. In the present study, we analysed the fimA DNA sequences of 84 strains of P. gingivalis and characterized the antigenicity of FimA fimbriae. Strains analysed here comprised 10, 16, 29, 13, 10 and 6 strains of types I, Ib, II, III, IV and V, respectively. DNA sequencing revealed that type Ib does not represent a single cluster and that type II sequences are remarkably diverse. In contrast, the fimA sequences of the other types were relatively homogeneous. Antigenicity was investigated using antisera elicited by pure FimA fimbriae of types I-V. Antigenicity correlated generally with the respective genotype. Type Ib strains were recognized by type I antisera. However, some strains showed cross-reactivity, especially, many type II strains reacted with type III antisera. The levels of fimbrial expression were highly variable, and expression was positively correlated with ability of biofilm formation on a saliva-coated plate. Further, two strains without FimA and Mfa1 fimbriae expressed fimbrial structures, suggesting that the strains produce other types of fimbriae.
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Affiliation(s)
- K Nagano
- Department of Microbiology, School of Dentistry, Aichi Gakuin University, Nagoya, Japan.
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Abiko Y, Kumagai Y. Interaction of Keap1 Modified by 2-tert-Butyl-1,4-benzoquinone with GSH: Evidence for S-Transarylation. Chem Res Toxicol 2013; 26:1080-7. [DOI: 10.1021/tx400085h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yumi Abiko
- Doctoral Program
in Biomedical
Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki
305-8575, Japan
| | - Yoshito Kumagai
- Doctoral Program
in Biomedical
Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki
305-8575, Japan
- Faculty
of Medicine, University of Tsukuba, 1-1-1
Tennodai, Tsukuba, Ibaraki
305-8575, Japan
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Chui C, Aoki A, Takeuchi Y, Sasaki Y, Hiratsuka K, Abiko Y, Izumi Y. Antimicrobial effect of photodynamic therapy using high-power blue light-emitting diode and red-dye agent on Porphyromonas gingivalis. J Periodontal Res 2013; 48:696-705. [PMID: 23441868 DOI: 10.1111/jre.12055] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2013] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND OBJECTIVE Antimicrobial photodynamic therapy (a-PDT) using a combination of red-colored laser/light-emitting diode (LED) and blue dye has been employed for periodontal therapy and the antimicrobial effect seems promising. Blue light, which has favorable wavelength properties, would be more effective as a light source for a-PDT because blue light itself possesses an antimicrobial effect. This study aimed to investigate the effect of a-PDT using a novel combination of high-power blue LED and red-dye agent on Porphyromonas gingivalis in vitro. MATERIAL AND METHODS Porphyromonas gingivalis ATCC 33277 suspension was irradiated with blue LED (BL) (425-470 nm) or red LED (RL) (625-635 nm) at 30-90 J/cm(2) , or was mixed with erythrosine (ER), phloxine B (PB) or rose bengal (RB) with or without BL irradiation (30 J/cm(2) ). RL (30 J/cm(2) ) in combination with toluidine blue was employed as positive control. All the suspensions of P. gingivalis were serially diluted, plated and incubated anaerobically, and the numbers of colony-forming units (CFUs) were counted on day 7. RESULTS BL irradiation at 60 and 90 J/cm(2) demonstrated a significant reduction in the numbers of CFUs. ER, PB and RB solutions at 160 μg/mL showed almost no or only a minimal reduction in the numbers of CFUs. BL at 30 J/cm(2) combined with ER, PB or RB at 160 μg/mL resulted in a log reduction of 0.9, 1.0 and 7.1, respectively, in the numbers of CFUs; 30 J/cm(2) BL with RB at 1.6, 16 and 160 μg/mL demonstrated a log reduction of 6.3, 8.0 and 5.5, respectively; and a log reduction of 5.2 was obtained after 30 J/cm(2) RL with 16 μg/mL TB. CONCLUSION Within the limits of this study, BL was found to have an antimicrobial/growth-inhibiting effect on P. gingivalis, and a-PDT using a combination of BL and RB shows promise as a new technical modality for bacterial elimination in periodontal therapy.
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Affiliation(s)
- C Chui
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Global Center of Excellence (GCOE) Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Tokyo Medical and Dental University, Tokyo, Japan
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Kudo C, Naruishi K, Maeda H, Abiko Y, Hino T, Iwata M, Mitsuhashi C, Murakami S, Nagasawa T, Nagata T, Yoneda S, Nomura Y, Noguchi T, Numabe Y, Ogata Y, Sato T, Shimauchi H, Yamazaki K, Yoshimura A, Takashiba S. Assessment of the Plasma/Serum IgG Test to Screen for Periodontitis. J Dent Res 2012; 91:1190-5. [DOI: 10.1177/0022034512461796] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Chronic periodontitis is a silent infectious disease prevalent worldwide and affects lifestyle-related diseases. Therefore, efficient screening of patients is essential for general health. This study was performed to evaluate prospectively the diagnostic utility of a blood IgG antibody titer test against periodontal pathogens. Oral examination was performed, and IgG titers against periodontal pathogens were measured by ELISA in 1,387 individuals. The cut-off value of the IgG titer was determined in receiver operating characteristic curve analysis, and changes in periodontal clinical parameters and IgG titers by periodontal treatment were evaluated. The relationships between IgG titers and severity of periodontitis were analyzed. The best cut-off value of IgG titer against Porphyromonas gingivalis for screening periodontitis was 1.682. Both clinical parameters and IgG titers decreased significantly under periodontal treatment. IgG titers of periodontitis patients were significantly higher than those of healthy controls, especially in those with sites of probing pocket depth over 4 mm. Multiplied cut-off values were useful to select patients with severe periodontitis. A blood IgG antibody titer test for Porphyromonas gingivalis is useful to screen hitherto chronic periodontitis patients (ClinicalTrials.gov number NCT01658475).
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Affiliation(s)
- C. Kudo
- Department of Periodontics and Endodontics, Okayama University Hospital, Okayama, Japan
| | - K. Naruishi
- Department of Periodontics and Endodontics, Okayama University Hospital, Okayama, Japan
- currently, Division of Endodontology, Iwate Medical University, Department of Conservative Dentistry and Oral Rehabilitation, Iwate, Japan
| | - H. Maeda
- Department of Pathophysiology - Periodontal Science, Okayama, University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Y. Abiko
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - T. Hino
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - M. Iwata
- Toyota Motor Corporation, Tokyo/Aichi, Japan
| | | | - S. Murakami
- Department of Periodontology, Division of Oral Biology and Disease Control, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - T. Nagasawa
- Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
- currently, Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - T. Nagata
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - S. Yoneda
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Y. Nomura
- Department of Translational Research, School of Dental Medicine, Tsurumi University, Kanagawa, Japan
| | - T. Noguchi
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - Y. Numabe
- Department of Periodontology, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan
| | - Y. Ogata
- Department of Periodontology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - T. Sato
- Department of Oral Health, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan
| | - H. Shimauchi
- Department of Oral Biology, Division of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Miyagi, Japan
| | - K. Yamazaki
- Laboratory of Periodontology and Immunology, Department of Oral Health and Welfare, Niigata University Faculty of Dentistry, Niigata, Japan
| | - A. Yoshimura
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - S. Takashiba
- Department of Pathophysiology - Periodontal Science, Okayama, University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Abiko Y, Miura T, Phuc BH, Shinkai Y, Kumagai Y. Participation of covalent modification of Keap1 in the activation of Nrf2 by tert-butylbenzoquinone, an electrophilic metabolite of butylated hydroxyanisole. Toxicol Appl Pharmacol 2011; 255:32-9. [DOI: 10.1016/j.taap.2011.05.013] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 05/16/2011] [Accepted: 05/16/2011] [Indexed: 12/01/2022]
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Shibata Y, Okano S, Shiroza T, Tahara T, Nakazawa K, Kataoka S, Ishida I, Kobayashi T, Yoshie H, Abiko Y. Characterization of human-type monoclonal antibodies against reduced form of hemin binding protein 35 from Porphyromonas gingivalis. J Periodontal Res 2011; 46:673-81. [PMID: 21644999 DOI: 10.1111/j.1600-0765.2011.01389.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND OBJECTIVE The gram-negative anaerobe Porphyromonas gingivalis has been implicated as an important pathogen in the development of adult periodontitis, and its colonization of subgingival sites is critical in the pathogenic process. We previously identified a 35 kDa surface protein (hemin binding protein 35; HBP35) from P. gingivalis that exhibited coaggregation activity, while additional analysis suggested that this protein possessed an ability to bind heme molecules. For development of passive immunotherapy for periodontal diseases, human-type monoclonal antibodies have been prepared using HBP35 as an antigen in TransChromo mice. In the present study, we focused on a single antibody, TCmAb-h13, which is known to inhibit heme binding to recombinant HBP35. The aim of our investigation was to clarify the redox-related function of HBP35 and consider the benefits of human-type monoclonal antibodies. MATERIAL AND METHODS To examine the antigen recognition capability of TCmAbs with immunoblotting and Biacore techniques, we used the native form as well as several Cys-to-Ser variants of recombinant HBP35. RESULTS We found that the redox state of recombinant HBP35 was dependent on two Cys residues, (48) C and (51) C, in the thioredoxin active center (WCGxCx). Furthermore, TCmAb-h13 recognized the reduced forms of recombinant HBP35, indicating its inhibitory effect on P. gingivalis growth. CONCLUSION Hemin binding protein 35 appears to be an important molecule involved in recognition of the redox state of environmental conditions. In addition, TCmAb-h13 had an inhibitory effect on heme binding to recombinant HBP35, thereby interfering with P. gingivalis growth.
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Affiliation(s)
- Y Shibata
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
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Zhao J, Watanabe T, Bhawal UK, Kubota E, Abiko Y. Transcriptome analysis of β-TCP implanted in dog mandible. Bone 2011; 48:864-77. [PMID: 21134491 DOI: 10.1016/j.bone.2010.11.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 10/20/2010] [Accepted: 11/27/2010] [Indexed: 11/25/2022]
Abstract
Beta-tricalcium phosphate (β-TCP) is widely used in clinical orthopedic surgery due to its high biodegradability, osteoconductivity, easy manipulation and lack of histotoxicity. However, little is known about the molecular mechanisms responsible for the beneficial effects of β-TCP in bone formation. In this study, β-TCP was implanted in dog mandibles, after which the gene expression profiles and signaling pathways were monitored using microarray and Ingenuity Pathways Analysis (IPA). Following the extraction of premolars and subsequent bone healing, β-TCP was implanted into the artificial osseous defect. Histological evaluation (H-E staining) was carried out 4, 7 and 14 days after implantation. In addition, total RNA was isolated from bone tissues and gene expression profiles were examined using microarray analysis coupled with Ingenuity Pathways Analysis (IPA). Finally, real-time PCR was used to confirm mRNA levels. It was found that β-TCP implantation led to a two-fold change in 3409 genes on day 4, 3956 genes on day 7, and 6899 genes on day 14. Among them, the expression of collagen type I α1 (COL1A1), alkaline phosphatase (ALP) and transforming growth factor (TGF)-β2 was increased on day 4, the expression of receptor activator of NF-kappaB ligand (RANKL) and interferon-γ (IFN-γ) was decreased on day 7, and the expression of osteoprotegerin (OPG) was decreased on day 14, affecting the bone morphogenetic protein (BMP), Wnt/β-catenin and nuclear factor-kappaB (NF-κB) signaling pathways in osteoblasts and osteoclasts. Simultaneously, vascular cell adhension molecule (VCAM)-1 expression was increased on day 4 and stromal cell-derived factor (SDF)-1 expression was increased on days 4 and 14. Taken together, these findings shed light on some of the cellular events associated with bone formation, bioresorption, regeneration and healing of β-TCP following its implantation. The results suggest that β-TCP enhances bone healing processes and stimulates the coordinated actions of osteoblasts and osteoclasts, leading to bone regeneration.
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Affiliation(s)
- J Zhao
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, 2-870-1, Sakaecho-Nishi, Matsudo, Chiba 271-8587, Japan
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Li Y, Shibata Y, Zhang L, Kuboyama N, Abiko Y. Periodontal pathogen Aggregatibacter actinomycetemcomitans LPS induces mitochondria-dependent-apoptosis in human placental trophoblasts. Placenta 2010; 32:11-9. [PMID: 21074850 DOI: 10.1016/j.placenta.2010.10.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 09/22/2010] [Accepted: 10/07/2010] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Increasing evidence suggests an association between periodontal disease and low birthweight (LBW); however the underlying molecular mechanisms are yet to be fully elucidated. In this study, we performed a microarray analysis to observe the human placental trophoblast-like BeWo cells response to lipopolysaccharide (LPS) from periodontopathogen Aggregatibacter actinomycetemcomitans (Aa), in order to investigate the molecular basis of mechanisms for periodontitis-associated LBW. In vivo pregnant rats were also used to confirm the in vitro results. STUDY DESIGN The effects of Aa-LPS on cultured human placental trophoblast-like BeWo cells were studied using a DNA microarray, Ingenuity Pathway Analysis, real-time PCR and poly-caspase staining. The in vivo effects of Aa-LPS in pregnant rats were examined using TUNEL assays. RESULTS In BeWo cells, Aa-LPS increased levels of cytochrome c, caspase 2, caspase 3, caspase 9 and BCL2-antagonist/killer 1 mRNA, decreased those of B-cell CLL/lymphoma 2, BCL2-like 1 and catalase mRNA and increased poly-caspase activity, all of which are consistent with activation of the mitochondria-dependent apoptotic pathway. TUNEL assays confirmed the increased incidence of apoptosis in placentas of Aa-LPS-treated rats (p < 0.001). CONCLUSION Aa-LPS induces apoptosis in human trophoblasts via the mitochondria-dependent pathway, and this effect may contribute to the pathogenesis of periodontitis-associated LBW.
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Affiliation(s)
- Y Li
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, 2-870-1, Sakaecho-Nishi, Matsudo, Chiba 271-8587, Japan.
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Abstract
Our previous study indicated that Nrf2 is a key transcription factor in cellular defenses against inorganic arsenite (iAsIII). However, the role of heme oxygenase-1 (HO-1), which is regulated by Nrf2, in iAsIII-induced cytotoxicity is poorly understood. To address this issue, we examined the contribution of HO-1 to iAsIII-mediated Nrf2 activation and in protection against iAsIII cytotoxicity in HepG2 cells. Exposure of HepG2 cells to iAsIII (10 microM) caused persistent induction of HO-1 accompanied by prolonged Nrf2 activation, whereas siRNA-mediated knockdown of HO-1 decreased prolonged Nrf2 activation. Pretreatment with either HO-1 siRNA or HO inhibitor (tin protoporphyrin IX) significantly enhanced iAsIII-induced cytotoxicity. These results suggest that iAsIII-induced HO-1 appears, at least in part, to act as a positive feedback regulator of Nrf2 activation, thereby diminishing its cytotoxicity in HepG2 cells.
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Affiliation(s)
- Yumi Abiko
- Doctoral Program in Life System Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Ohshima M, Yamaguchi Y, Matsumoto N, Micke P, Takenouchi Y, Nishida T, Kato M, Komiyama K, Abiko Y, Ito K, Otsuka K, Kappert K. TGF-β Signaling in Gingival Fibroblast-Epithelial Interaction. J Dent Res 2010; 89:1315-21. [DOI: 10.1177/0022034510378423] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The underlying mechanism and the therapeutic regimen for the transition of reversible gingivitis to irreversible periodontitis are unclear. Since transforming growth factor (TGF)-β has been implicated in differentially regulated gene expression in gingival fibroblasts, we hypothesized that TGF-β signaling is activated in periodontitis-affected gingiva, along with enhanced collagen degradation, that is reversed by TGF-β inhibition. A novel three-dimensional (3D) gel-culture system consisting of primary human gingival fibroblasts (GF) and gingival epithelial (GE) cells in collagen gels was applied. GF populations from patients with severe periodontitis degraded collagen gels, which was reduced by TGF-β-receptor kinase inhibition. Up-regulation of TGF-β-responsive genes was evident in GF/GE co-cultures. Furthermore, the TGF-β downstream transducer Smad3C was highly phosphorylated in periodontitis-affected gingiva and 3D cultures. These results imply that TGF-β signaling is involved in fibroblast-epithelial cell interaction in periodontitis, and suggest that the 3D culture system is a useful in vitro model for therapeutic drug screening for periodontitis.
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Affiliation(s)
- M. Ohshima
- Department of Biochemistry, Ohu University School of Pharmaceutical Sciences, Misumido 31–1, Tomitamachi, Koriyama, Fukushima 963–8611, Japan
- Departments of Biochemistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Y. Yamaguchi
- Departments of Biochemistry, Nihon University School of Dentistry, Tokyo, Japan
- Divisions of Functional Morphology, Nihon University School of Dentistry, Tokyo, Japan
| | - N. Matsumoto
- Departments of Pathology, Nihon University School of Dentistry, Tokyo, Japan
- Divisions of Bio-defense, Nihon University School of Dentistry, Tokyo, Japan
| | - P. Micke
- Institute for Genetics and Pathology, Uppsala University Hospital, Uppsala, Sweden
| | - Y. Takenouchi
- Departments of Periodontology, Nihon University School of Dentistry, Tokyo, Japan
| | - T. Nishida
- Departments of Periodontology, Nihon University School of Dentistry, Tokyo, Japan
- Divisions of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - M. Kato
- Department of Experimental Pathology, Graduate School of Comprehensive Human Science, University of Tsukuba, Japan
| | - K. Komiyama
- Departments of Pathology, Nihon University School of Dentistry, Tokyo, Japan
- Divisions of Bio-defense, Nihon University School of Dentistry, Tokyo, Japan
| | - Y. Abiko
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - K. Ito
- Departments of Periodontology, Nihon University School of Dentistry, Tokyo, Japan
- Divisions of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - K. Otsuka
- Departments of Biochemistry, Nihon University School of Dentistry, Tokyo, Japan
- Divisions of Functional Morphology, Nihon University School of Dentistry, Tokyo, Japan
| | - K. Kappert
- Center for Cardiovascular Research (CCR), Institute of Pharmacology, Charité-University Medicine Berlin, Germany
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Abiko Y, Sato T, Mayanagi G, Takahashi N. Profiling of subgingival plaque biofilm microflora from periodontally healthy subjects and from subjects with periodontitis using quantitative real-time PCR. J Periodontal Res 2010; 45:389-95. [PMID: 20337892 DOI: 10.1111/j.1600-0765.2009.01250.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND AND OBJECTIVE Qualitative and quantitative changes of the subgingival plaque biofilm microflora in periodontal pockets are thought to be associated with the development and progression of periodontitis. The aims of the present study were to quantify the proportions of nine periodontitis-associated bacterial species and four Streptococcus species in subgingival plaque, and to evaluate their relationship with periodontitis quantitatively. MATERIAL AND METHODS Subgingival plaque samples were obtained from 12 periodontally healthy subjects and from 28 patients with periodontitis. The amounts of total and target bacteria were measured by quantitative real-time PCR using universal and species-specific primers, respectively. RESULTS The proportion of total obligate anaerobes was found to be higher in subjects with periodontitis than in periodontally healthy subjects (p < 0.05). Among obligate anaerobes, Tannerella forsythia (2.04 +/- 5.27%, p < 0.05), Porphyromonas gingivalis (0.54 +/- 1.41%) and Eubacterium saphenum (0.30 +/- 0.96%) were detected at high proportions in subjects with periodontitis, but not in periodontally healthy subjects. By contrast, the proportion of total streptococci was lower in subjects with periodontitis (p < 0.05). Specifically, the proportion of T. forsythia, P. gingivalis or E. saphenum increased (>or= 2.78%) and the proportion of Streptococcus species decreased to virtually undetectable levels, in subjects with periodontitis. CONCLUSION Obligate anaerobes, including T. forthysia, P. gingivalis and E. saphenum, were identified predominantly in microflora from subjects with periodontitis, whereas Streptococcus species were identified predominantly in microflora from periodontally healthy subjects, suggesting a change in the subgingival environment that resulted in conditions more suitable for the survival of obligate anaerobes. The proportion of these obligate anaerobes in the subgingival plaque of subjects with periodontitis appears to be associated with the status of human periodontitis.
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Affiliation(s)
- Y Abiko
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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