1
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Aoki H, Shinkai Y, Akiyama M, Yamazaki S, Nishida M, Kumagai Y. Extracellularly secreted cysteine derived from cystine regulates oxidative and electrophilic stress in HepG2 cells. Free Radic Res 2024:1-10. [PMID: 38733204 DOI: 10.1080/10715762.2024.2350524] [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: 09/21/2023] [Accepted: 01/03/2024] [Indexed: 05/13/2024]
Abstract
While cysteine (CysSH) is known to be exported into the extracellular space, its biological significance is not well understood. The present study examined the movement of extracellular CysSH using stable isotope-labeled cystine (CysSSCys), which is transported into cells and reduced to CysSH. Exposure of HepG2 cells to 100 µM stable isotope-labeled CysSSCys resulted in 70 µM labeled CysSH in cell medium 1 h after CysSSCys exposure. When the cell medium was collected and incubated with either hydrogen peroxide (H2O2) or atmospheric electrophiles, such as 1,2-naphthoquinone, 1,4-naphthoquinone and 1,4-benzoquinone, CysSH in the cell medium was almost completely consumed. In contrast, extracellular levels of CysSH were unaltered during exposure of HepG2 cells to H2O2 for up to 2 h, suggesting redox cycling of CysSSCys/CysSH in the cell system. Experiments with and without changing cell medium containing CysSH from HepG2 cells revealed that oxidative and electrophilic modifications of cellular proteins, caused by exposure to H2O2 and 1,2-naphthoquinone, were significantly repressed by CysSH in the medium. We also examined participation of enzymes and/or antioxidants in intracellular reduction of CysSSCys to CysSH. These results provide new findings that extracellular CysSH derived from CysSSCys plays a role in the regulation of oxidative and electrophilic stress.
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Affiliation(s)
- Hanako Aoki
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
| | - Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
- Environmental Biology Laboratory, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Masahiro Akiyama
- Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan
| | - Satoshi Yamazaki
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
| | - Motohiro Nishida
- Graduate School of Pharmaceutical Sciences, Kyusyu University, Fukuoka, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
- Graduate School of Pharmaceutical Sciences, Kyusyu University, Fukuoka, Japan
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Akiyama M, Uchiyama J, Kumagai Y, Kim YG. [Supersulfides to Regulate Electrophilic Stress]. YAKUGAKU ZASSHI 2024; 144:47-50. [PMID: 38171794 DOI: 10.1248/yakushi.23-00162-2] [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] [Indexed: 01/05/2024]
Abstract
Environmental electrophiles modify thiol groups of proteins in organs, disrupting cellular functions carried out by the modified proteins and increasing the risk of various diseases. The transcription factor NF-E2-related factor 2 (Nrf2) plays a crucial role in detoxifying electrophiles by forming glutathione adducts and subsequently excreting them into extracellular spaces. Supersulfides such as cysteine persulfides (CysSSH) produced by cystathionine γ-lyase (CSE) capture environmental electrophiles through sulfur adduct formation. However, the Nrf2 and CSE contributions to blocking environmental electrophile-mediated toxicity have yet to be evaluated. Therefore, we assessed the individual and combined roles of Nrf2 and CSE in suppressing toxicity induced by environmental electrophiles using Nrf2 knockout (KO), CSE KO, and Nrf2/CSE double KO (DKO) mice. Our findings indicate that CSE/Nrf2 DKO mice are more sensitive to environmental electrophiles compared to their single KO counterparts, highlighting the distinct mechanisms through which both pathways mitigate the toxic effects of reactive electrophiles. Moreover, diverse metabolites produced by symbiotic gut bacteria in the human body are known to exert various effects on host organ functions beyond the intestinal tract. We observed reduced blood supersulfide levels in mice lacking gut microflora compared to normal mice. Furthermore, we identified intestinal bacteria belonging to the families Ruminococcaceae and Lachnospiraceae as high CysSSH-producing bacteria. This suggests that the gut microbiota serves as a source of in vivo supersulfide molecules. These findings suggest that supersulfide derived from gut bacteria may act protectively against environmental electrophilic exposure in the host.
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Affiliation(s)
- Masahiro Akiyama
- Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University
| | - Jun Uchiyama
- Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University
| | | | - Yun-Gi Kim
- Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University
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Osa S, Enoki Y, Miyajima T, Akiyama M, Fujiwara Y, Taguchi K, Kim YG, Matsumoto K. SCIATIC DENERVATION-INDUCED SKELETAL MUSCLE ATROPHY IS ASSOCIATED WITH PERSISTENT INFLAMMATION AND INCREASED MORTALITY DURING SEPSIS. Shock 2023; 59:417-425. [PMID: 36427072 DOI: 10.1097/shk.0000000000002053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
ABSTRACT Background: Patients with underlying skeletal muscle atrophy are likely to develop aggravated sepsis. However, no study has experimentally verified the association between the prognosis of sepsis and muscle atrophy, and the mechanism of aggravation of sepsis under muscle atrophy remains unclear. In this study, we investigated the effect of skeletal muscle atrophy induced by sciatic denervation (DN), an experimental muscle atrophy model, on sepsis prognosis. Methods: Skeletal muscle atrophy was induced by DN of the sciatic nerve in C57BL/6J male mice. Cecal ligation and puncture (CLP) was performed to induce sepsis. Results: The survival rates of the sham and DN groups 7 days after CLP were 63% and 35%, respectively, wherein an approximately 30% reduction was observed in the DN group ( P < 0.05, vs. sham-CLP). The DN group had a higher bacterial count in the blood 48 h after CLP ( P < 0.05, vs. sham-CLP). Notably, NOx (a metabolite of nitric oxide) concentrations in DN mice were higher than those in sham mice after CLP ( P < 0.05, vs. sham-CLP), whereas serum platelet levels were lower 48 h after CLP ( P < 0.05, vs. sham-CLP). In organ damage analysis, DN mice presented increased protein expression of the kidney injury molecule (KIM-1) and neutrophil gelatinase-associated lipocalin (NGAL), a kidney injury marker, after CLP (NGAL 48 h after CLP, P < 0.05, vs. sham-CLP; KIM-1 24 h after CLP, P < 0.01, vs. sham-CLP). Furthermore, nitro tyrosine levels in the kidneys of DN mice were higher 48 h after CLP compared with those in sham-CLP mice, indicating the accumulation of nitrative stress ( P < 0.05, vs. sham-CLP). Serum cytokine levels were increased in both groups after CLP, but decreased in the sham group 48 h after CLP and remained consistently higher in the DN group (tumor necrosis factor [TNF]-α: P < 0.05, sham-CLP vs. DN-CLP; interleukin (IL)-1β: P < 0.01, sham-CLP vs. DN-CLP; IL-6: P < 0.05, DN vs. DN-CLP; IL-10: P < 0.05, sham-CLP vs. DN-CLP). Conclusions: We verified that skeletal muscle atrophy induced by DN is associated with poor prognosis after CLP-induced sepsis. Importantly, mice with skeletal muscle atrophy presented worsening sepsis prognosis at late onset, including prolonged infection, persistent inflammation, and kidney damage accumulation, resulting in delayed recovery.
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Affiliation(s)
- Sumika Osa
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Shibakoen, Minato-ku, Tokyo, Japan
| | - Yuki Enoki
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Shibakoen, Minato-ku, Tokyo, Japan
| | - Taichi Miyajima
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Shibakoen, Minato-ku, Tokyo, Japan
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, Japan
| | - Yukio Fujiwara
- Department of Cell Pathology, Graduate School of Medical Sciences, Kumamoto University, Honjo, Kumamoto Chuo-ku, Kumamoto, Japan
| | - Kazuaki Taguchi
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Shibakoen, Minato-ku, Tokyo, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, Japan
| | - Kazuaki Matsumoto
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Shibakoen, Minato-ku, Tokyo, Japan
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Shinkai Y, Onose Y, Akiyama M, Hirose R, Kumagai Y. Capture of Electrophilic Quinones in the Extracellular Space: Evidence for a Phase Zero Reaction. Chem Res Toxicol 2023; 36:23-31. [PMID: 36525601 DOI: 10.1021/acs.chemrestox.2c00223] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Electrophilic quinones are produced during the combustion of gasoline in the atmosphere. Although these reactive species covalently bind to protein-based nucleophiles in cells, resulting in the formation of protein adducts involved in the modulation of redox signaling pathways and cytotoxicity, the extracellular regulation of quinones is not understood. In this study, incubation of 1,2-naphthoquinone (1,2-NQ) with the low-molecular-weight fraction of mouse plasma resulted in the consumption of cysteine (CysSH) in the plasma in a concentration-dependent manner. Covalent modification of albumin was markedly repressed by the addition of either the low-molecular-weight fraction of mouse plasma or CysSH, suggesting that CysSH protects by forming a conjugate with 1,2-NQ. Similar phenomena also occurred for other atmospheric quinones 1,4-NQ and 1,4-benzoquinone (1,4-BQ). The addition of cystine to a culture medium without amino acids enhanced the release of CysSH from A431 cells and blocked 1,2-NQ-mediated arylation of intracellular proteins, suggesting that 1,2-NQ interacts with extracellular CysSH. Liquid chromatography-tandem mass spectrometry analysis revealed that 1,2-NQ and 1,4-BQ undergoes nucleophilic attack by CysSH, yielding a 1,2-NQH2-SCys adduct and 1,4-BQH2-SCys adduct, respectively. Unlike 1,2-NQ and 1,4-BQ, the authentic 1,2-NQH2-SCys adduct and 1,4-BQH2-SCys adduct had little effect on the covalent modification of cellular proteins and viability of A431 cells. These results suggest that electrophilic quinones are readily trapped by CysSH released from A431 cells, forming less-toxic CysSH adducts and thereby repressing covalent modification of cellular proteins. These findings provide evidence for the existence of a "phase zero" reaction of electrophiles prior to their uptake by cells.
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Affiliation(s)
- Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan.,Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Yusuke Onose
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Masahiro Akiyama
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan.,Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo 105-8512, Japan
| | - Reiko Hirose
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan.,Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki 305-8575, Japan
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5
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Shinoda Y, Akiyama M, Toyama T. Potential Association between Methylmercury Neurotoxicity and Inflammation. Biol Pharm Bull 2023; 46:1162-1168. [PMID: 37661394 DOI: 10.1248/bpb.b23-00075] [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] [Indexed: 09/05/2023]
Abstract
Methylmercury (MeHg) is the causal substrate of Minamata disease and a major environmental toxicant. MeHg is widely distributed, mainly in the ocean, meaning its bioaccumulation in seafood is a considerable problem for human health. MeHg has been intensively investigated and is known to induce inflammatory responses and neurodegeneration. However, the relationship between MeHg-induced inflammatory responses and neurodegeneration is not understood. In the present review, we first describe recent findings showing an association between inflammatory responses and certain MeHg-unrelated neurological diseases caused by neurodegeneration. In addition, cell-specific MeHg-induced inflammatory responses are summarized for the central nervous system including those of microglia, astrocytes, and neurons. We also describe MeHg-induced inflammatory responses in peripheral cells and tissue, such as macrophages and blood. These findings provide a concept of the relationship between MeHg-induced inflammatory responses and neurodegeneration, as well as direction for future research of MeHg-induced neurotoxicity.
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Affiliation(s)
- Yo Shinoda
- Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University
| | - Takashi Toyama
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University
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Taki T, Mori S, Murakami Y, Urata T, Okumura M, Akanabe H, Ebata A, Imai S, Yokota K, Akiyama M. 494 Low plasma fibrinogen levels are associated with poor prognosis in cutaneous angiosarcoma of the head and neck. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.508] [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: 11/19/2022]
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7
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Yamashita Y, Muro Y, Koizumi H, Ogawa-Momohara M, Takeichi T, Akiyama M. 140 Clinical characteristics of systemic sclerosis patients with anti-NOR90 antibodies. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.150] [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: 11/19/2022]
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8
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Akiyama M, Unoki T, Aoki H, Nishimura A, Shinkai Y, Warabi E, Nishiyama K, Furumoto Y, Anzai N, Akaike T, Nishida M, Kumagai Y. Cystine-dependent antiporters buffer against excess intracellular reactive sulfur species-induced stress. Redox Biol 2022; 57:102514. [PMID: 36279630 PMCID: PMC9594640 DOI: 10.1016/j.redox.2022.102514] [Citation(s) in RCA: 7] [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] [Received: 09/14/2022] [Revised: 10/07/2022] [Accepted: 10/15/2022] [Indexed: 11/30/2022] Open
Abstract
Reactive sulfur species (RSS) play a role in redox homeostasis; however, adaptive cell responses to excessive intracellular RSS are not well understood. Therefore, in this study, we generated transgenic (Tg) mice overexpressing cystathionine gamma-lyase (CSE) to produce excessive RSS. Contrary to expectations, tissue concentrations of RSS, such as cysteine persulfide (CysSSH), were comparable in both wild-type and CSE Tg mice, but the plasma concentrations of CysSSH were significantly higher in CSE Tg mice than in wild-type mice. This export of surplus intracellular RSS was also observed in primary hepatocytes of CSE Tg mice. Exposure of primary hepatocytes to the RSS generator sodium tetrasulfide (Na2S4) resulted in an initial increase in the intracellular concentration of RSS, which later returned to basal levels after export into the extracellular space. Interestingly, among all amino acids, cystine (CysSSCys) was found to be essential for CysSSH export from primary mouse hepatocytes, HepG2 cells, and HEK293 cells during Na2S4 exposure, suggesting that the cystine/glutamate transporter (SLC7A11) contributes, at least partially, to CysSSH export. We established HepG2 cell lines with knockout and overexpression of SLC7A11 and used them to confirm SLC7A11 as the predominant antiporter of CysSSCys and CysSSH. We observed that the poor efflux of excess CysSSH from the cell enhanced cellular stresses induced by Na2S4 exposure, such as polysulfidation of intracellular proteins, mitochondrial damage, and cytotoxicity. These results suggest the presence of a cellular response to excess intracellular RSS that involves the extracellular efflux of excess CysSSH by a cystine-dependent transporter to maintain intracellular redox homeostasis.
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Affiliation(s)
- Masahiro Akiyama
- Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, 105-8512, Japan
| | - Takamitsu Unoki
- Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Basic Medical Sciences, National Institute for Minamata Disease, Kumamoto, 867-0008, Japan
| | - Hanako Aoki
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Akiyuki Nishimura
- National Institute for Physiological Sciences, National Institutes of Natural Sciences, Aichi, 444-8787, Japan
| | - Yasuhiro Shinkai
- Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Eiji Warabi
- Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Kazuhiro Nishiyama
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yuka Furumoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Naohiko Anzai
- Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Takaaki Akaike
- Graduate School of Medicine, Tohoku University, Miyagi, 980-8575, Japan
| | - Motohiro Nishida
- National Institute for Physiological Sciences, National Institutes of Natural Sciences, Aichi, 444-8787, Japan; Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yoshito Kumagai
- Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, 305-8575, Japan.
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9
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Yakabe K, Higashi S, Akiyama M, Mori H, Murakami T, Toyoda A, Sugiyama Y, Kishino S, Okano K, Hirayama A, Gotoh A, Li S, Mori T, Katayama T, Ogawa J, Fukuda S, Hase K, Kim YG. Dietary-protein sources modulate host susceptibility to Clostridioides difficile infection through the gut microbiota. Cell Rep 2022; 40:111332. [PMID: 36103838 DOI: 10.1016/j.celrep.2022.111332] [Citation(s) in RCA: 7] [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] [Received: 04/05/2022] [Revised: 07/12/2022] [Accepted: 08/17/2022] [Indexed: 11/27/2022] Open
Abstract
Clostridioides difficile causes nosocomial antibiotic-associated diarrhea on a global scale. Susceptibility to C. difficile infection (CDI) is influenced by the composition and metabolism of gut microbiota, which in turn are affected by diet. However, the mechanism underlying the interplay between diet and gut microbiota that modulates susceptibility to CDI remains unclear. Here, we show that a soy protein diet increases the mortality of antibiotic-treated, C. difficile-infected mice while also enhancing the intestinal levels of amino acids (aas) and relative abundance of Lactobacillus genus. Indeed, Ligilactobacillus murinus-mediated fermentation of soy protein results in the generation of aas, thereby promoting C. difficile growth, and the process involves the anchored cell wall proteinase PrtP. Thus, mutual interaction between dietary protein and the gut microbiota is a critical factor affecting host susceptibility to CDI, suggesting that dietary protein sources can be an important determinant in controlling the disease.
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Affiliation(s)
- Kyosuke Yakabe
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | | | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Yuta Sugiyama
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Shigenobu Kishino
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Kenji Okano
- Department of Life Science and Biotechnology, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Osaka 564-8680, Japan; International Center for Biotechnology, Osaka University, Osaka 565-0871, Japan
| | - Akiyoshi Hirayama
- Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan
| | - Aina Gotoh
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Shunyi Li
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka 819-0395, Japan
| | - Takeshi Mori
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka 819-0395, Japan
| | - Takane Katayama
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Shinji Fukuda
- Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan; Transborder Medical Research Center, University of Tsukuba, Ibaraki 305-8575, Japan; Gut Environmental Design Group, Kanagawa Institute of Industrial Science and Technology, Kanagawa 210-0821, Japan; Laboratory for Regenerative Microbiology, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; The Institute of Fermentation Sciences (IFeS), Faculty of Food and Agricultural Sciences, Fukushima University, Kanayagawa, Fukushima 960-1296, Japan; International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo (IMSUT), Tokyo 108-8639, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan.
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Kumagai Y, Akiyama M, Unoki T, Shinkai Y. P07-04 Contribution of Nrf2 and cystathionine gamma-lyase to environmental electrophile-mediated toxicity in mice. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.347] [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: 10/14/2022]
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11
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Seki N, Kimizuka T, Gondo M, Yamaguchi G, Sugiura Y, Akiyama M, Yakabe K, Uchiyama J, Higashi S, Haneda T, Suematsu M, Hase K, Kim YG. D-tryptophan suppresses enteric pathogens and pathobionts and prevents colitis by modulating microbial tryptophan metabolism. iScience 2022; 25:104838. [PMID: 35996581 PMCID: PMC9391578 DOI: 10.1016/j.isci.2022.104838] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 12/15/2021] [Revised: 05/17/2022] [Accepted: 07/21/2022] [Indexed: 11/17/2022] Open
Abstract
D-Amino acids (D-AAs) have various functions in mammals and microbes. D-AAs are produced by gut microbiota and can act as potent bactericidal molecules. Thus, D-AAs regulate the ecological niche of the intestine; however, the actual impacts of D-AAs in the gut remain unknown. In this study, we show that D-Tryptophan (D-Trp) inhibits the growth of enteric pathogen and colitogenic pathobionts. The growth of Citrobacter rodentium in vitro is strongly inhibited by D-Trp treatment. Moreover, D-Trp protects mice from lethal C. rodentium infection via reduction of the pathogen. Additionally, D-Trp prevents the development of experimental colitis by the depletion of specific microbes in the intestine. D-Trp increases the intracellular level of indole acrylic acid (IA), a key molecule that determines the susceptibility of enteric microbes to D-Trp. Treatment with IA improves the survival of mice infected with C. rodentium. Hence, D-Trp could act as a gut environmental modulator that regulates intestinal homeostasis. D-Trp inhibits the growth of Citrobacter rodentium in vitro and in vivo D-Trp suppresses experimental colitis by the depletion of specific gut microbes IA is the metabolite that determines the susceptibility of enteric microbes to D-Trp
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Affiliation(s)
- Natsumi Seki
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Tatsuki Kimizuka
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Monica Gondo
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Genki Yamaguchi
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Yuki Sugiura
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Kyosuke Yakabe
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Jun Uchiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Seiichiro Higashi
- Co-Creation Center, Meiji Holdings Co., Ltd., 1-29-1 Nanakuni, Hachiouji, Tokyo 192-0919, Japan
| | - Takeshi Haneda
- Laboratory of Microbiology, School of Pharmacy, Kitasato University, Tokyo 108-8641, Japan
| | - Makoto Suematsu
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Koji Hase
- Department of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
- Corresponding author
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Tomioka S, Seki N, Sugiura Y, Akiyama M, Uchiyama J, Yamaguchi G, Yakabe K, Ejima R, Hattori K, Kimizuka T, Fujimura Y, Sato H, Gondo M, Ozaki S, Honme Y, Suematsu M, Kimura I, Inohara N, Núñez G, Hase K, Kim YG. Cooperative action of gut-microbiota-accessible carbohydrates improves host metabolic function. Cell Rep 2022; 40:111087. [PMID: 35858544 DOI: 10.1016/j.celrep.2022.111087] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 03/17/2022] [Accepted: 06/22/2022] [Indexed: 12/31/2022] Open
Abstract
Microbiota-accessible carbohydrates (MACs) exert health-promoting effects, but how each MAC impacts gut microbiota and regulates host physiology remains unclear. Here, we show that l-arabinose and sucrose cooperatively act on gut microbiota and exert anti-obesogenic effects. Specifically, l-arabinose, a monosaccharide that is poorly absorbed in the gut and inhibits intestinal sucrase, suppresses diet-induced obesity in mice in the presence of sucrose. Additionally, the suppressive effect of l-arabinose on adiposity is abrogated in mice lacking the short-chain fatty acid (SCFA) receptors GPR43 and GPR41. Mechanistically, l-arabinose increases the relative abundance of acetate and propionate producers (e.g., Bacteroides), while sucrose enhances SCFA production. Furthermore, l-arabinose and sucrose activate the glycolytic and pentose phosphate pathways of Bacteroides, respectively, indicating that they synergistically promote acetate production through distinct pathways. These findings suggest that each MAC has a unique property and thus may serve as a precision gut-microbiota modulator to promote host homeostasis.
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Affiliation(s)
- Sawako Tomioka
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Natsumi Seki
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Yuki Sugiura
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Masahiro Akiyama
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Jun Uchiyama
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Genki Yamaguchi
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Kyosuke Yakabe
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Ryuta Ejima
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Kouya Hattori
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Tatsuki Kimizuka
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Yumiko Fujimura
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Hiroki Sato
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Monica Gondo
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Satoru Ozaki
- Co-Creation Center, Meiji Holdings Co., Ltd., Tokyo 192-0919, Japan
| | - Yoshiko Honme
- Co-Creation Center, Meiji Holdings Co., Ltd., Tokyo 192-0919, Japan
| | - Makoto Suematsu
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Ikuo Kimura
- Laboratory of Molecular Neurobiology, Graduate School of Biostudies, Kyoto University, Yoshidakonoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Naohiro Inohara
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Gabriel Núñez
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery and Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan.
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Akiyama M, Shinkai Y, Yamakawa H, Kim YG, Kumagai Y. Potentiation of methylmercury toxicity by combined metal exposure: In vitro and in vivo models of a restricted metal exposome. Chemosphere 2022; 299:134374. [PMID: 35318019 DOI: 10.1016/j.chemosphere.2022.134374] [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] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/05/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Methylmercury (MeHg) is a prevalent toxic metal that readily modifies protein thiols. Reactive persulfides that play a role in redox homeostasis are able to inactivate this metal through sulfur adduct formation. Although humans are exposed to other metals that could consume reactive persulfides on a daily basis, the health effects of combined exposure to MeHg and other metals remain unexplored. This study aimed to examine potential MeHg toxicity during exposure to MeHg with other metals capable of consuming reactive persulfides. We designed a simple system to assess the risk of combined exposure to metals based on reactivity to reactive persulfides and mercury accumulation. Among the metals examined in a cell-free system, copper, cadmium, nickel, and MeHg consumed Na2S2, used as a model of reactive persulfides, whereas zinc, iron, lithium, strontium, tin, and aluminum did not. In HepG2 cells, binary exposure to MeHg and copper, but not aluminum, increased the consumption of extracellular reactive persulfides. Binary exposure exacerbated MeHg-induced cytotoxicity by promoting the modification of intracellular proteins by MeHg. In a mouse model, binary exposure to MeHg and copper resulted in elevated mercury accumulation in the fetuses and placenta of pregnant mice, as well as the brain and liver of non-pregnant mice. Our study suggests that MeHg sensitivity can be increased by combined exposure with other electrophilic metals. In particular, binary exposure to MeHg and copper during pregnancy exacerbated mercury accumulation in offspring.
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Affiliation(s)
- Masahiro Akiyama
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan; Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, 105-8512, Japan
| | - Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hiroto Yamakawa
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, 105-8512, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan.
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Hiramoto K, Akiyama M, Kaneko Y. POS1424 RISK FACTORS FOR ADVERSE EVENTS OF SULFAMETHOXAZOLE-TRIMETHOPRIM PROPHYLAXIS IN PATIENTS WITH SYSTEMIC RHEUMATIC DISEASES. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.2215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundThe prophylactic use of sulfamethoxazole-trimethoprim (SMX/TMP) can reduce the risk for developing pneumocystis pneumonia in immunosuppressed patients with systemic rheumatic diseases, whereas discontinuation of SMX/TMP prophylaxis is frequent due to adverse events (AEs) with this drug.ObjectivesThe purpose of this study was to identify risk factors for AEs of SMX/TMP in patients with systemic rheumatic diseases.MethodsAll consecutive patients who were admitted in our hospital for induction treatment between 2012 and 2019 and newly received prophylactic SMX/TMP were included in the study. We divided them into two groups according to the presence or absence of AEs of SMX/TMP leading to discontinuation of the drug and compared clinical characteristics between the AE and non-AE groups. Multivariable analysis was performed to identify risk factors for AEs of SMX/TMP prophylaxis.ResultsA total of 438 patients were included in the study. Rheumatic diseases of the patients were systemic lupus erythematosus (25.3%), anti-neutrophil cytoplasmic antibody associated vasculitis (15.5%), rheumatoid arthritis (11.6%), polymyositis/dermatomyositis (10.7%), IgG4-related disease (8.5%), large vessel vasculitis (7.1%), adult-onset Still’s disease (AOSD; 4.1%), and others (17.2%). Among them, 82 patients (18.7%) stopped SMX/TMP due to AEs. Most frequent AEs were skin rash (36.6%), followed by liver dysfunction (29.3%), thrombocytopenia (19.5%), elevation in serum creatinine levels (15.9%), hyperkalemia (14.6%), hyponatremia (11%), leukopenia (6.1%), and fever (6.1%). Baseline age (61.4±16.4 vs 56.3±16.9 years, p=0.014) and prednisolone dose for remission induction treatment (0.97 vs 0.91 mg/kg/day, p=0.03) were significantly higher in the AE group than in the non-AE group, respectively. In terms of disease type, significantly higher rates of AEs were observed in patients with AOSD than in those with the other diseases (66.7% vs 16.7%, p<0.001; Figure 1). Blood tests at SMX/TMP initiation demonstrated lower lymphocyte counts (10.1 vs 10.8 x102/μl, p=0.049), lower platelet counts (20.9 vs 25.8 x104/μl, p=0.045), lower albumin levels (3.2 vs 3.4 g/dl, p=0.007), higher AST levels (26 vs 23 U/L, p=0.04), higher creatinine levels (0.71 vs 0.67 mg/dl, p=0.047), and higher ferritin levels (167 vs 154 ng/ml, p=0.047) in the AEs group compared with the non-AEs group, respectively. Multivariable analysis identified an older age (OR 1.03, p=0.002) and AOSD (OR 9.72, p<0.001) as independent risk factors for AEs leading to SMX/TMP withdrawal (Table 1).ConclusionOld age and AOSD were associated with AEs of SMX/TMP prophylaxis in patients with systemic rheumatic diseases.Disclosure of InterestsNone declared
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Ishigaki S, Akiyama M, Kaneko Y. AB0621 Characteristics of Anti-Neutrophil Cytoplasmic Antibody Associated Vasculitis With Severe Peripheral Neuropathy. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.2228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundPeripheral neuropathy is one of major manifestations of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) and has a significant impingement on patients’ quality of life.1,2ObjectivesThe aim of this study was to clarify clinical features of AAV patients with peripheral neuropathy and identify risk factors for severe motor neuropathy.MethodsAll consecutive patients with active, treatment-naïve AAV who were admitted to our hospital between April, 2012 and October, 2021 were reviewed. Patients were divided into two groups according to the presence or absence of peripheral neuropathy, and their baseline clinical characteristics were compared.ResultsA total of 76 patients (microscopic polyangiitis, MPA, n=37, granulomatosis with poly angiitis, GPA, n=24, eosinophilic GPA, EGPA, n=15) were included in the study. Among them, 28 patients (36.8%) had peripheral neuropathy including 12 with MPA, 4 with GPA, and 12 with EGPA. The clinical characteristics of all patients with peripheral neuropathy were younger age (66.0 years versus 74.5 years, p<0.05) and showed higher white blood cell counts (11500/μL versus 8800/μL, p<0.05), higher blood eosinophil counts (788.5/μL versus 139.0/μL, p<0.05), higher creatinine clearance (77.3 mL/min versus 56.3 mL/min, p<0.05), higher levels of serum immunoglobulin (Ig)E (660 IU/mL versus 125 IU/mL, p<0.05), and IgG4 (361.5 mg/dL versus 84.0 mg/dL, p <0.05). In patients with EGPA, the most susceptible type to peripheral neuropathy, 80% of the patients had peripheral neuropathy. Comparison between patients with EGPA with peripheral neuropathy and those without demonstrated significantly younger age (56.0 years versus 80.0 years, p<0.05) and higher blood eosinophil counts (7832/μL versus 2340/μL, p<0.05) were characteristic for the presence of peripheral neuropathy. Patients with EGPA with motor neuropathy (n=8) showed higher white blood cell counts (26850//μL versus 8650//μL, p <0.05) and higher blood eosinophil counts (13134//μL versus 3436//μL, p<0.05) compared with those with only sensory neuropathy (n=4).ConclusionOur current study has shown that patients with EGPA are more prone to peripheral neuropathy than patients with MPA or GPA. Severe motor neuropathy was observed only in patients with EGPA and associated with more intense eosinophilic inflammation. Our results suggest that molecular targeted therapy that improves eosinophilic inflammation such as anti-IL-5 therapy is beneficial for peripheral neuropathy.References[1]RUTGERS, Abraham; KALLENBERG, Cees GM. Peripheral neuropathy in AAV—when vasculitis hits a nerve. Nature Reviews Rheumatology, 2012, 8.3: 127-128.[2]NAKAZAWA, Daigo, et al. Pathogenesis and therapeutic interventions for ANCA-associated vasculitis. Nature Reviews Rheumatology, 2019, 15.2: 91-101.Disclosure of InterestsNone declared
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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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Uchiyama J, Akiyama M, Hase K, Kumagai Y, Kim YG. Gut microbiota reinforce host antioxidant capacity via the generation of reactive sulfur species. Cell Rep 2022; 38:110479. [PMID: 35263581 DOI: 10.1016/j.celrep.2022.110479] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [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: 09/30/2021] [Revised: 12/22/2021] [Accepted: 02/11/2022] [Indexed: 12/31/2022] Open
Abstract
Gut microbiota act beyond the gastrointestinal tract to regulate the physiology of the host. However, their contribution to the antioxidant capacity of the host remains largely understudied. In this study, we observe that gut bacteria increase the steady-state plasma levels of high-antioxidant molecules, reactive sulfur species (RSS), such as hydrogen sulfide and cysteine persulfide (CysSSH), in the host. Moreover, gut bacteria utilize cystine as a substrate to enzymatically produce CysSSH. Administration of cystine to mice increases their plasma levels of RSS and suppresses the concanavalin-A-induced oxidative stress and liver damage in a gut-microbiota-dependent manner. We find that gut bacteria belonging to the Lachnospiraceae and Ruminococcaceae families have a high capacity to produce RSS, requiring pyridoxal 5'-phosphate for their enzymatic reactions. Collectively, our data demonstrate that gut microbiota enhance the antioxidant capacity of the host through the generation of RSS.
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Affiliation(s)
- Jun Uchiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan.
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan.
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Unoki T, Akiyama M, Shinkai Y, Kumagai Y, Fujimura M. Spatio-temporal distribution of reactive sulfur species during methylmercury exposure in the rat brain. J Toxicol Sci 2022; 47:31-37. [PMID: 34987139 DOI: 10.2131/jts.47.31] [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: 11/02/2022]
Abstract
Brain susceptibility to methylmercury (MeHg) is developmentally and regionally specific in both humans and rodents, but the mechanism is not well clarified. Reactive sulfur species (RSS) with high nucleophilicity can react with MeHg, leading to the formation of a less toxic metabolite bismethylmercury sulfide, thus exerting cytoprotection. In this study, we assessed the variation of RSS content in the rat brain and evaluated its relevance in sensitivity to MeHg. Analyses of fetal/juvenile rat brains showed low RSS levels in early developmental stages. Site-specific analysis of adult rat brains revealed that cerebellar RSS levels were lower than those of the hippocampus. Microscopically, RSS levels of the granular cell layer were lower than those of the molecular layer in the cerebellum. Thus, low RSS levels corresponded with age and site of the brain that is vulnerable to MeHg. Taken together with the finding that brain RSS were consumed during MeHg exposure, these results indicate that RSS is a factor that defines the specificity of MeHg vulnerability in the brain.
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Affiliation(s)
- Takamitsu Unoki
- Department of Basic Medical Sciences, National Institute for Minamata Disease
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
| | - Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba
| | - Masatake Fujimura
- Department of Basic Medical Sciences, National Institute for Minamata Disease
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Takeichi T, Ikeda K, Muro Y, Ogi T, Morizane S, Akiyama M. Epithelioid cell granuloma formation in CARD14-associated papulosquamous eruptions. J Eur Acad Dermatol Venereol 2021; 36:e369-e371. [PMID: 34927775 DOI: 10.1111/jdv.17890] [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: 11/28/2022]
Affiliation(s)
- T Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Ikeda
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Ogi
- Department of Genetics, Research Institute of Environmental Medicine (RIeM), Nagoya University, Nagoya, Japan.,Department of Human Genetics and Molecular Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Morizane
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Tanaka Y, Iwata Y, Saito K, Fukushima H, Watanabe S, Hasegawa Y, Akiyama M, Sugiura K. Cutaneous ischemia-reperfusion injury is exacerbated by IL-36 receptor antagonist deficiency. J Eur Acad Dermatol Venereol 2021; 36:295-304. [PMID: 34699104 DOI: 10.1111/jdv.17767] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/26/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND Loss-of-function homozygous or compound heterozygous mutations in IL36RN, which encodes interleukin-36 receptor antagonist (IL-36Ra), has been implicated in the pathogenesis of skin disorders. However, the pathogenic role of IL-36Ra in cutaneous ischemia-reperfusion (I/R) injury remains unclear. OBJECTIVES We investigated the role of IL36Ra in cutaneous I/R injury. METHODS We examined I/R injury in Il36rn-/- mice. The area of wounds, numbers of infiltrated cells, apoptotic cells and neutrophil extracellular trap (NET) formation were assessed. The expression levels of various genes were analysed using real-time RT-PCR. The expression of high mobility group box 1 (HMGB1), an endogenous toll-like receptor (TLR) 4 ligand, was confirmed using immunohistology, and serum HMGB1 levels were measured by ELISA. Cytokine production by stimulated cultured J774A.1 and HaCaT cells was examined. RESULTS IL-36Ra deficiency resulted in significantly delayed wound healing and increased neutrophil and macrophage infiltration into the wound tissues. Il36rn-/- mice had increased mRNA expression levels of CXCL1, CXCL2, CCL4, TNF-α, TGF-β, IL-1β, IL-6 and IL-36γ relative to wild-type mice. Apoptosis was identified in keratinocytes by TUNEL assay. HMGB1 expression in the I/R site was decreased in both keratinocytes and adnexal cells, while serum HMGB1 levels were significantly elevated after reperfusion. The mRNA levels of various cytokines, including IL-1β, were elevated in J774A.1 cells through TLR4 signalling by HMGB1 stimulation. In addition, HaCaT cells stimulated with IL-1β showed significantly increased CXCL1, TNF-α, IL-6, IL-36β and IL-36γ mRNA expression. Furthermore, NET formation was increased by IL-36Ra deficiency. Finally, either the blockade of TLR4 signalling by TAK-242 or inhibition of NET formation by Cl-amidine normalized exacerbated I/R injury in Il36rn-/- mice. CONCLUSIONS This study indicated that IL-36Ra deficiency exacerbates cutaneous I/R injury due to excessive inflammatory cell recruitment, NET formation, and excessive cytokine and chemokine production via the TLR4 pathway by HMGB1 released from epidermal apoptotic cells.
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Affiliation(s)
- Y Tanaka
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Y Iwata
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - K Saito
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Fukushima
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - S Watanabe
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Y Hasegawa
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Sugiura
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
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Takeuchi S, Takeichi T, Koike Y, Takama H, Tanahashi K, Okuno Y, Ishii N, Muro Y, Ogi T, Suga Y, Akiyama M. Mutations in SAM syndrome and palmoplantar keratoderma patients suggest genotype/phenotype correlations in DSG1 mutations. J Eur Acad Dermatol Venereol 2021; 36:e215-e218. [PMID: 34657339 DOI: 10.1111/jdv.17752] [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] [Received: 07/17/2021] [Revised: 09/21/2021] [Accepted: 10/13/2021] [Indexed: 11/28/2022]
Affiliation(s)
- S Takeuchi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Koike
- Department of Dermatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - H Takama
- Department of Dermatology, Aichi Medical University, Nagakute, Japan
| | - K Tanahashi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Okuno
- Medical Genomics Center, Nagoya University Hospital, Nagoya, Japan.,Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - N Ishii
- Department of Dermatology, Kurume University School of Medicine, Fukuoka, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Ogi
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Y Suga
- Department of Dermatology, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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22
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Ebata A, Taki T, Mori S, Murakami Y, Okumura M, Akanabe H, Imai S, Yokota K, Akiyama M. 283 Neutrophil/lymphocyte ratio as a predictor of lymph node metastasis in extramammary Paget disease: A retrospective study. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.289] [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: 10/20/2022]
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23
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Ejima R, Akiyama M, Sato H, Tomioka S, Yakabe K, Kimizuka T, Seki N, Fujimura Y, Hirayama A, Fukuda S, Hase K, Kim YG. Seaweed Dietary Fiber Sodium Alginate Suppresses the Migration of Colonic Inflammatory Monocytes and Diet-Induced Metabolic Syndrome via the Gut Microbiota. Nutrients 2021; 13:nu13082812. [PMID: 34444972 PMCID: PMC8401899 DOI: 10.3390/nu13082812] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 07/31/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 12/19/2022] Open
Abstract
Metabolic syndrome (MetS) is a multifactorial chronic metabolic disorder that affects approximately one billion people worldwide. Recent studies have evaluated whether targeting the gut microbiota can prevent MetS. This study aimed to assess the ability of dietary fiber to control MetS by modulating gut microbiota composition. Sodium alginate (SA) is a seaweed-derived dietary fiber that suppresses high-fat diet (HFD)-induced MetS via an effect on the gut microbiota. We observed that SA supplementation significantly decreased body weight gain, cholesterol levels, and fat weight, while improving glucose tolerance in HFD-fed mice. SA changed the gut microbiota composition and significantly increased the abundance of Bacteroides. Antibiotic treatment completely abolished the suppressive effects of SA on MetS. Mechanistically, SA decreased the number of colonic inflammatory monocytes, which promote MetS development, in a gut microbiota-dependent manner. The abundance of Bacteroides was negatively correlated with that of inflammatory monocytes and positively correlated with the levels of several gut metabolites. The present study revealed a novel food function of SA in preventing HFD-induced MetS through its action on gut microbiota.
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Affiliation(s)
- Ryuta Ejima
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
| | - Hiroki Sato
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Kaigen Pharma Co., Ltd., Osaka 541-0045, Japan
| | - Sawako Tomioka
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Kyosuke Yakabe
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Tatsuki Kimizuka
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Natsumi Seki
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Yumiko Fujimura
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Akiyoshi Hirayama
- Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan; (A.H.); (S.F.)
| | - Shinji Fukuda
- Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan; (A.H.); (S.F.)
- Transborder Medical Research Center, University of Tsukuba, Ibaraki 305-8575, Japan
- Intestinal Microbiota Project, Kanagawa Institute of Industrial Science and Technology, Kanagawa 210-0821, Japan
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (Y.F.); (K.H.)
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (R.E.); (M.A.); (H.S.); (S.T.); (K.Y.); (T.K.); (N.S.)
- Correspondence:
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24
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Akiyama M. Isolated autosomal recessive woolly hair/hypotrichosis: genetics, pathogenesis and therapies. J Eur Acad Dermatol Venereol 2021; 35:1788-1796. [PMID: 33988877 DOI: 10.1111/jdv.17350] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 04/16/2021] [Indexed: 01/05/2023]
Abstract
Isolated autosomal recessive woolly hair/hypotrichosis (ARWH) is a rare hereditary hair disease characterized by tightly curled sparse hair at birth or in early infancy. Patients with ARWH consist of genetically heterogeneous groups. Woolly hair autosomal recessive 1 (ARWH1) (MIM #278150), woolly hair autosomal recessive 2 (ARWH2) (MIM #604379) and woolly hair autosomal recessive 3 (ARWH3) (MIM #616760) are caused by mutations in LPAR6, LIPH and KRT25, respectively. In addition, nonsense variants in C3ORF52 (*611956) were identified in ARWH patients. The frequencies of the mutations in the causative genes in ARWH patients are thought to differ by ethnicity and country/geographical area. Large numbers of ARWH families with LIPH mutations have been described only in populations from Japan, Pakistan and the Volga-Ural region of Russia. In that region of Russia, most ARWH families have an extremely prevalent founder mutation, the deletion of exon 4, in LIPH. In the Pakistani population, 47.2% of ARWH families had the disease due to LIPH mutations and 52.8% of them carried LPAR6 mutations. The prevalent, recurrent LIPH mutation c.659_660delTA (p.Ile220Argfs*29) was found in more than half of Pakistani ARWH families with LIPH mutations. Most Japanese ARWH families (98.7%) harbour LIPH mutations, including the two highly prevalent, recurrent LIPH mutations c.736T>A (p.Cys246Ser) and c.742C>A (p.His248Asn). In ARWH patients whose disease was due to LIPH, LPAR6 or C3ORF52 mutations, the loss of function of LIPH, LPAR6 or C3ORF52 leads to reduced LIPH-LPA-LPAR6 signalling, resulting in the decreased transactivation of EGFR signalling and the phenotype of underdeveloped hairs. Our recent prospective interventional study suggests that topical minoxidil might be a promising treatment for ARWH due to LIPH mutations, although sufficiently effective treatments have not been established for ARWH yet.
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Affiliation(s)
- M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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25
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Kimizuka T, Seki N, Yamaguchi G, Akiyama M, Higashi S, Hase K, Kim YG. Amino Acid-Based Diet Prevents Lethal Infectious Diarrhea by Maintaining Body Water Balance in a Murine Citrobacter rodentium Infection Model. Nutrients 2021; 13:nu13061896. [PMID: 34072947 PMCID: PMC8227537 DOI: 10.3390/nu13061896] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 05/12/2021] [Revised: 05/23/2021] [Accepted: 05/27/2021] [Indexed: 01/02/2023] Open
Abstract
Infectious diarrhea is one of the most important health problems worldwide. Although nutritional status influences the clinical manifestation of various enteric pathogen infections, the effect of diet on enteric infectious diseases remains unclear. Using a fatal infectious diarrheal model, we found that an amino acid-based diet (AD) protected susceptible mice infected with the enteric pathogen Citrobacter rodentium. While the mice fed other diets, including a regular diet, were highly susceptible to C. rodentium infection, AD-fed mice had an increased survival rate. An AD did not suppress C. rodentium colonization or intestinal damage; instead, it prevented diarrhea-induced dehydration by increasing water intake. An AD altered the plasma and fecal amino acid levels and changed the gut microbiota composition. Treatment with glutamate, whose level was increased in the plasma and feces of AD-fed mice, promoted water intake and improved the survival of C. rodentium-infected mice. Thus, an AD changes the systemic amino acid balance and protects against lethal infectious diarrhea by maintaining total body water content.
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Affiliation(s)
- Tatsuki Kimizuka
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (T.K.); (N.S.); (G.Y.); (M.A.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan;
| | - Natsumi Seki
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (T.K.); (N.S.); (G.Y.); (M.A.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan;
| | - Genki Yamaguchi
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (T.K.); (N.S.); (G.Y.); (M.A.)
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan;
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (T.K.); (N.S.); (G.Y.); (M.A.)
| | - Seiichiro Higashi
- Co-Creation Center, Meiji Holdings Co., Ltd., Tokyo 192-0919, Japan;
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan;
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo 105-8512, Japan; (T.K.); (N.S.); (G.Y.); (M.A.)
- Correspondence:
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26
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Fujita Y, Nohara T, Takashima S, Natsuga K, Adachi M, Yoshida K, Shinkuma S, Takeichi T, Nakamura H, Wada O, Akiyama M, Ishiko A, Shimizu H. Intravenous allogeneic multilineage-differentiating stress-enduring cells in adults with dystrophic epidermolysis bullosa: a phase 1/2 open-label study. J Eur Acad Dermatol Venereol 2021; 35:e528-e531. [PMID: 33656198 PMCID: PMC8359848 DOI: 10.1111/jdv.17201] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/20/2021] [Accepted: 02/18/2021] [Indexed: 12/11/2022]
Affiliation(s)
- Y Fujita
- Department of Dermatology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan.,Department of Dermatology, Sapporo City General Hospital, Sapporo, Japan
| | - T Nohara
- Department of Dermatology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan
| | - S Takashima
- Department of Dermatology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan
| | - K Natsuga
- Department of Dermatology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan
| | - M Adachi
- Department of Dermatology, Toho University School of Medicine, Tokyo, Japan
| | - K Yoshida
- Department of Dermatology, Toho University School of Medicine, Tokyo, Japan
| | - S Shinkuma
- Department of Dermatology, Nara Medical University School of Medicine, Kashihara, Japan
| | - T Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - H Nakamura
- Department of Dermatology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan
| | - O Wada
- Life Science Institute Inc., Tokyo, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - A Ishiko
- Department of Dermatology, Toho University School of Medicine, Tokyo, Japan
| | - H Shimizu
- Department of Dermatology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan
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27
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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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Yakabe K, Uchiyama J, Akiyama M, Kim YG. Understanding Host Immunity and the Gut Microbiota Inspires the New Development of Vaccines and Adjuvants. Pharmaceutics 2021; 13:163. [PMID: 33530627 PMCID: PMC7911583 DOI: 10.3390/pharmaceutics13020163] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/21/2021] [Accepted: 01/23/2021] [Indexed: 12/26/2022] Open
Abstract
Vaccinations improve the mortality and morbidity rates associated with several infections through the generation of antigen-specific immune responses. Adjuvants are often used together with vaccines to improve immunogenicity. However, the immune responses induced by most on-going vaccines and adjuvants approved for human use vary in individuals; this is a limitation that must be overcome to improve vaccine efficacy. Several reports have indicated that the symbiotic bacteria, particularly the gut microbiota, impact vaccine-mediated antigen-specific immune responses and promote the induction of nonspecific responses via the "training" of innate immune cells. Therefore, the interaction between gut microbiota and innate immune cells should be considered to ensure the optimal immunogenicity of vaccines and adjuvants. In this review, we first introduce the current knowledge on the immunological mechanisms of vaccines and adjuvants. Subsequently, we discuss how the gut microbiota influences immunity and highlight the relationship between gut microbes and trained innate immunity, vaccines, and adjuvants. Understanding these complex interactions will provide insights into novel vaccine approaches centered on the gut microbiota.
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Affiliation(s)
- Kyosuke Yakabe
- Research Center for Drug Discovery, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan; (K.Y.); (J.U.); (M.A.)
- Division of Biochemistry, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Jun Uchiyama
- Research Center for Drug Discovery, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan; (K.Y.); (J.U.); (M.A.)
- Division of Biochemistry, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan; (K.Y.); (J.U.); (M.A.)
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan; (K.Y.); (J.U.); (M.A.)
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29
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Seki N, Akiyama M, Yamakawa H, Hase K, Kumagai Y, Kim YG. Adverse effects of methylmercury on gut bacteria and accelerated accumulation of mercury in organs due to disruption of gut microbiota. J Toxicol Sci 2021; 46:91-97. [PMID: 33536393 DOI: 10.2131/jts.46.91] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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] [Indexed: 11/02/2022]
Abstract
Methylmercury (MeHg), an environmental electrophile, binds covalently to the cysteine residues of proteins in organs, altering protein function and causing cytotoxicity. MeHg has also been shown to alter the composition of gut microbes. The gut microbiota is a complex community, the disturbance of which has been linked to the development of certain diseases. However, the relationship between MeHg and gut bacteria remains poorly understood. In this study, we showed that MeHg binds covalently to gut bacterial proteins via cysteine residues. We examined the effects of MeHg on the growth of selected Lactobacillus species, namely, L. reuteri, L. gasseri, L. casei, and L. acidophilus, that are frequently either positively or negatively correlated with human diseases. The results revealed that MeHg inhibits the growth of Lactobacillus to varying degrees depending on the species. Furthermore, the growth of L. reuteri, which was inhibited by MeHg exposure, was restored by Na2S2 treatment. By comparing mice with and without gut microbiota colonization, we found that gut bacteria contribute to the production of reactive sulfur species such as hydrogen sulfide and hydrogen persulfide in the gut. We also discovered that the removal of gut bacteria accelerated accumulation of mercury in the cerebellum, liver, and lungs of mice subsequent to MeHg exposure. These results accordingly indicate that MeHg is captured and inactivated by the hydrogen sulfide and hydrogen persulfide produced by intestinal microbes, thereby providing evidence for the role played by gut microbiota in reducing MeHg toxicity.
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Affiliation(s)
- Natsumi Seki
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
| | - Masahiro Akiyama
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba
| | - Hiroto Yamakawa
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba
| | - Koji Hase
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba
| | - Yun-Gi Kim
- Research Center for Drug Discovery, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University
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30
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Ito Y, Takeichi T, Igari S, Mori T, Ono A, Suyama K, Takeuchi S, Muro Y, Ogi T, Hosoya M, Yamamoto T, Akiyama M. MEDNIK-like syndrome due to compound heterozygous mutations in AP1B1. J Eur Acad Dermatol Venereol 2020; 35:e345-e347. [PMID: 33349978 DOI: 10.1111/jdv.17098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/07/2020] [Accepted: 12/16/2020] [Indexed: 11/29/2022]
Affiliation(s)
- Y Ito
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Igari
- Department of Dermatology, Fukushima Medical University, Fukushima, Japan
| | - T Mori
- Department of Dermatology, Fukushima Medical University, Fukushima, Japan
| | - A Ono
- Department of Pediatrics, Fukushima Medical University, Fukushima, Japan
| | - K Suyama
- Department of Pediatrics, Fukushima Medical University, Fukushima, Japan
| | - S Takeuchi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Ogi
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - M Hosoya
- Department of Pediatrics, Fukushima Medical University, Fukushima, Japan
| | - T Yamamoto
- Department of Dermatology, Fukushima Medical University, Fukushima, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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31
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Hirata K, Shobu K, Yamada H, Uehara M, Anggraini S, Akiyama M. Thermodynamic assessment of the Al–Sc–N ternary system and phase-separated region of the strained wurtzite phase. Ann Ital Chir 2020. [DOI: 10.1016/j.jeurceramsoc.2020.06.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Murase Y, Takeichi T, Tanahashi K, Marumo Y, Suzuki Y, Nakamura S, Akiyama M. Cutaneous extramedullary hematopoiesis in a patient with secondary myelofibrosis due to MPL gene mutation. J Eur Acad Dermatol Venereol 2020; 35:e257-e259. [PMID: 33043481 DOI: 10.1111/jdv.16990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y Murase
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Tanahashi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Marumo
- Department of Hematology and Oncology, Nagoya Memorial Hospital, Nagoya, Japan
| | - Y Suzuki
- Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan
| | - S Nakamura
- Department of Pathology, Handa City Hospital, Handa, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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33
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Takeichi T, Terawaki S, Kubota Y, Ito Y, Tanahashi K, Muro Y, Akiyama M. A patient with CARD14-associated papulosquamous eruptions showing atopic dermatitis-like features. J Eur Acad Dermatol Venereol 2020; 35:e58-e59. [PMID: 32619277 DOI: 10.1111/jdv.16799] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Terawaki
- Division of Dermatology, Fukuoka Sanno Hospital, Fukuoka, Japan
| | - Y Kubota
- Division of Dermatology, Fukuoka Sanno Hospital, Fukuoka, Japan
| | - Y Ito
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Tanahashi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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34
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Akiyama M, Unoki T, Shinkai Y, Ishii I, Ida T, Akaike T, Yamamoto M, Kumagai Y. Erratum: Environmental Electrophile-Mediated Toxicity in Mice Lacking Nrf2, CSE, or Both. Environ Health Perspect 2020; 128:69002. [PMID: 32543884 PMCID: PMC7297364 DOI: 10.1289/ehp7480] [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] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 05/25/2020] [Accepted: 05/26/2020] [Indexed: 06/03/2023]
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35
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Akiyama M, Unoki T, Yoshida E, Ding Y, Yamakawa H, Shinkai Y, Ishii I, Kumagai Y. Repression of mercury accumulation and adverse effects of methylmercury exposure is mediated by cystathionine γ-lyase to produce reactive sulfur species in mouse brain. Toxicol Lett 2020; 330:128-133. [PMID: 32413476 DOI: 10.1016/j.toxlet.2020.05.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/02/2020] [Accepted: 05/07/2020] [Indexed: 01/16/2023]
Abstract
Reactive sulfur species (RSS), such as hydropersulfides and hydropolysulfides with high nucleophilicity, contain mobilized sulfur that readily captures xenobiotic electrophiles, leading to their sulfur adducts. We have previously reported that RSS produced by cystathionine γ-lyase (CSE) captures the electrophilic metal methylmercury (MeHg) to form inert sulfur adducts, which in turn play a critical role in the protection against MeHg-induced motor impairment in mice. However, the mechanism underlying this neuroprotective effect is not fully understood. Here, we addressed this using CSE-knockout mice. The cerebellum of CSE-knockout mice was more susceptible to MeHg than that of wild type mice. Moreover, these CSE-deficient mice exhibited a higher level of mercury accumulation in the brain. However, co-treatment with sodium tetrasulfide, an RSS able to capture MeHg, leading to the formation of its sulfur adducts, blocked the increased accumulation of mercury, motor dysfunction and mortality caused by CSE deficiency. Our findings suggest that capturing MeHg by RSS in association with its sulfur adduct formation is involved in the repression of the brain distribution and deleterious effects of MeHg.
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Affiliation(s)
- Masahiro Akiyama
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Takamitsu Unoki
- Department of Basic Medical Sciences, National Institute for Minamata Disease, Minamata, Kumamoto 867-0008, Japan
| | - Eiko Yoshida
- Department of Environmental Health, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba 278-0022, Japan
| | - Yunjie Ding
- Environmental Biology Laboratory, 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
| | - Hiroto Yamakawa
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, 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
| | - Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Isao Ishii
- Laboratory of Health Chemistry, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
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36
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Aizawa S, Okada T, Keino-Masu K, Doan TH, Koganezawa T, Akiyama M, Tamaoka A, Masu M. Abnormal Pyramidal Decussation and Bilateral Projection of the Corticospinal Tract Axons in Mice Lacking the Heparan Sulfate Endosulfatases, Sulf1 and Sulf2. Front Mol Neurosci 2020; 12:333. [PMID: 32038163 PMCID: PMC6985096 DOI: 10.3389/fnmol.2019.00333] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 12/27/2019] [Indexed: 11/13/2022] Open
Abstract
The corticospinal tract (CST) plays an important role in controlling voluntary movement. Because the CST has a long trajectory throughout the brain toward the spinal cord, many axon guidance molecules are required to navigate the axons correctly during development. Previously, we found that double-knockout (DKO) mouse embryos lacking the heparan sulfate endosulfatases, Sulf1 and Sulf2, showed axon guidance defects of the CST owing to the abnormal accumulation of Slit2 protein on the brain surface. However, postnatal development of the CST, especially the pyramidal decussation and spinal cord projection, could not be assessed because DKO mice on a C57BL/6 background died soon after birth. We recently found that Sulf1/2 DKO mice on a mixed C57BL/6 and CD-1/ICR background can survive into adulthood and therefore investigated the anatomy and function of the CST in the adult DKO mice. In Sulf1/2 DKO mice, abnormal dorsal deviation of the CST fibers on the midbrain surface persisted after maturation of the CST. At the pyramidal decussation, some CST fibers located near the midline crossed the midline, whereas others located more laterally extended ipsilaterally. In the spinal cord, the crossed CST fibers descended in the dorsal funiculus on the contralateral side and entered the contralateral gray matter normally, whereas the uncrossed fibers descended in the lateral funiculus on the ipsilateral side and entered the ipsilateral gray matter. As a result, the CST fibers that originated from 1 side of the brain projected bilaterally in the DKO spinal cord. Consistently, microstimulation of 1 side of the motor cortex evoked electromyogram responses only in the contralateral forelimb muscles of the wild-type mice, whereas the same stimulation evoked bilateral responses in the DKO mice. The functional consequences of the CST defects in the Sulf1/2 DKO mice were examined using the grid-walking, staircase, and single pellet-reaching tests, which have been used to evaluate motor function in mice. Compared with the wild-type mice, the Sulf1/2 DKO mice showed impaired performance in these tests, indicating deficits in motor function. These findings suggest that disruption of Sulf1/2 genes leads to both anatomical and functional defects of the CST.
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Affiliation(s)
- Satoshi Aizawa
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Molecular Neurobiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.,Department of Neurology, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Takuya Okada
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Molecular Neurobiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Kazuko Keino-Masu
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Molecular Neurobiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Tri Huu Doan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Physiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Tadachika Koganezawa
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Physiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.,Transborder Medical Research Center, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Masahiro Akiyama
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Akira Tamaoka
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Neurology, Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Masayuki Masu
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Department of Molecular Neurobiology, Division of Biomedical Science, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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37
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Henderson CF, Bica I, Long FT, Irwin DD, Stull CH, Baker BW, Suarez Vega V, Taugher ZM, Fletes ED, Bartleson JM, Humphrey ML, Álvarez L, Akiyama M, Kumagai Y, Fukuto JM, Lin J. Cysteine Trisulfide Protects E. coli from Electrophile-Induced Death through the Generation of Cysteine Hydropersulfide. Chem Res Toxicol 2020; 33:678-686. [PMID: 31977195 DOI: 10.1021/acs.chemrestox.9b00494] [Citation(s) in RCA: 23] [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: 11/28/2022]
Abstract
Hydropersulfide and polysulfide species have recently been shown to elicit a wide variety of biological and physiological responses. In this study, we examine the effects of cysteine trisulfide (Cys-SSS-Cys; also known as thiocystine) treatment on E. coli. Previous studies in mammalian cells have shown that Cys-SSS-Cys treatment results in protection from the electrophiles. Here, we show that the protective effect of Cys-SSS-Cys treatment against electrophile-induced cell death is conserved in E. coli. This protection correlates with the rapid generation of cysteine hydropersulfide (Cys-SSH) in the culture media. We go on to demonstrate that an exogenous phosphatase expressed in E. coli, containing only a single catalytic cysteine, is protected from electrophile-induced inactivation in the presence of hydropersulfides. These data together demonstrate that E. coli can utilize Cys-SSS-Cys to generate Cys-SSH and that the Cys-SSH can protect cellular thiols from reactivity with the electrophiles.
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Affiliation(s)
- Catherine F Henderson
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Iris Bica
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Faith T Long
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Drew D Irwin
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Christine H Stull
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Blaine W Baker
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Valeria Suarez Vega
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Zachary M Taugher
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Eliza D Fletes
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Juliet M Bartleson
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Megan L Humphrey
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Lucía Álvarez
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , INQUIMAE-CONICET, Ciudad Universitaria, C1428EGA Buenos Aires , Argentina
| | - Masahiro Akiyama
- Environmental Biology Section, Faculty of Medicine , University of Tsukuba , Tsukuba , Ibaraki 305-8575 , Japan
| | - Yoshito Kumagai
- Environmental Biology Section, Faculty of Medicine , University of Tsukuba , Tsukuba , Ibaraki 305-8575 , Japan
| | - Jon M Fukuto
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Joseph Lin
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
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38
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Shibata A, Yoshikawa T, Makita S, Muro Y, Akiyama M. A case of late middle age-onset recurrent rheumatic fever. Clin Exp Dermatol 2020; 45:595-596. [PMID: 31875974 DOI: 10.1111/ced.14163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2019] [Indexed: 11/29/2022]
Affiliation(s)
- A Shibata
- Department of Dermatology, Gifu Prefectural Tajimi Hospital, Tajimi, Japan.,Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Yoshikawa
- Department of Dermatology, Gifu Prefectural Tajimi Hospital, Tajimi, Japan.,Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Makita
- Department of Dermatology, Gifu Prefectural Tajimi Hospital, Tajimi, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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39
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Kondo M, Melzer M, Karnaushenko D, Uemura T, Yoshimoto S, Akiyama M, Noda Y, Araki T, Schmidt OG, Sekitani T. Imperceptible magnetic sensor matrix system integrated with organic driver and amplifier circuits. Sci Adv 2020; 6:eaay6094. [PMID: 32010789 PMCID: PMC6976294 DOI: 10.1126/sciadv.aay6094] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 11/25/2019] [Indexed: 05/02/2023]
Abstract
Artificial electronic skins (e-skins) comprise an integrated matrix of flexible devices arranged on a soft, reconfigurable surface. These sensors must perceive physical interaction spaces between external objects and robots or humans. Among various types of sensors, flexible magnetic sensors and the matrix configuration are preferable for such position sensing. However, sensor matrices must efficiently map the magnetic field with real-time encoding of the positions and motions of magnetic objects. This paper reports an ultrathin magnetic sensor matrix system comprising a 2 × 4 array of magnetoresistance sensors, a bootstrap organic shift register driving the sensor matrix, and organic signal amplifiers integrated within a single imperceptible platform. The system demonstrates high magnetic sensitivity owing to the use of organic amplifiers. Moreover, the shift register enabled real-time mapping of 2D magnetic field distribution.
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Affiliation(s)
- M. Kondo
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- National Institute of Advanced Industrial Science and Technology (AIST)–Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory (PhotoBIO-OIL), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M. Melzer
- Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Helmholtzstraße 20, D-01069 Dresden, Germany
| | - D. Karnaushenko
- Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Helmholtzstraße 20, D-01069 Dresden, Germany
| | - T. Uemura
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
- National Institute of Advanced Industrial Science and Technology (AIST)–Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory (PhotoBIO-OIL), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S. Yoshimoto
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - M. Akiyama
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Y. Noda
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - T. Araki
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- National Institute of Advanced Industrial Science and Technology (AIST)–Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory (PhotoBIO-OIL), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - O. G. Schmidt
- Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Helmholtzstraße 20, D-01069 Dresden, Germany
- Material Systems for Nanoelectronics, Chemnitz University of Technology, Reichenhainer Str. 70, D-09107 Chemnitz, Germany
- Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, Rosenbergstr. 6, D-09126 Chemnitz, Germany
- Corresponding author. (O.G.S.); (T.S.)
| | - T. Sekitani
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- National Institute of Advanced Industrial Science and Technology (AIST)–Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory (PhotoBIO-OIL), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Corresponding author. (O.G.S.); (T.S.)
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40
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Terao N, Akiyama M, Kumagai K, Takahashi G, Yoshioka I, Suzuki T, Suzuki Y, Maeda K, Saiki Y. Flow Rate in Pressure-Controlled, Selective Hypothermic Intercostal Artery Perfusion and Temperature Changes in Cerebrospinal Fluid during Thoracoabdominal Aortic Aneurysm Repair. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705387] [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: 10/24/2022]
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41
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Okochi S, Ogawa-Momohara M, Muro Y, Dittmer MR, Akiyama M. A single-centre cohort study on cutaneous manifestations of antinuclear matrix protein 2 antibody-positive dermatomyositis. Clin Exp Dermatol 2019; 45:591-593. [PMID: 31808188 DOI: 10.1111/ced.14152] [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] [Accepted: 12/03/2019] [Indexed: 11/29/2022]
Affiliation(s)
- S Okochi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Ogawa-Momohara
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M R Dittmer
- Aurora St Luke's Medical Center, Transitional Year Program, Milwaukee, WI, USA
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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42
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Kumagai Y, Akiyama M, Unoki T. Adaptive Responses to Electrophilic Stress and Reactive Sulfur Species as their Regulator Molecules. Toxicol Res 2019; 35:303-310. [PMID: 31636841 PMCID: PMC6791667 DOI: 10.5487/tr.2019.35.4.303] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/21/2019] [Accepted: 08/26/2019] [Indexed: 12/14/2022] Open
Abstract
We are exposed to numerous xenobiotic electrophiles on a daily basis through the environment, lifestyle, and dietary habits. Although such reactive species have been associated with detrimental effects, recent accumulated evidence indicates that xenobiotic electrophiles appear to act as signaling molecules. In this review, we introduce our findings on 1) activation of various redox signaling pathways involved in cell proliferation, detoxification/excretion of electrophiles, quality control of cellular proteins, and cell survival during exposure to xenobiotic electrophiles at low concentrations through covalent modification of thiol groups in sensor proteins, and 2) negative regulation of reactive sulfur species (RSS) in the modulation of redox signaling and toxicity caused by xenobiotic electrophiles.
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Affiliation(s)
- Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masahiro Akiyama
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takamitsu Unoki
- Department of Basic Medical Sciences, National Institute for Minamata Disease, Kumamoto, Japan
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43
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Takeichi T, Matsumoto T, Nomura T, Takeda M, Niwa H, Kono M, Shimizu H, Ogi T, Akiyama M. A novel
NCSTN
missense mutation in the signal peptide domain causes hidradenitis suppurativa, which has features characteristic of an autoinflammatory keratinization disease. Br J Dermatol 2019; 182:491-493. [DOI: 10.1111/bjd.18445] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- T. Takeichi
- Department of Dermatology Nagoya University Graduate School of Medicine Nagoya Japan
| | - T. Matsumoto
- Department of Dermatology Nagoya University Graduate School of Medicine Nagoya Japan
| | - T. Nomura
- Department of Dermatology Hokkaido University Graduate School of Medicine Sapporo Japan
| | - M. Takeda
- Department of Dermatology Hokkaido University Graduate School of Medicine Sapporo Japan
| | - H. Niwa
- Department of Dermatology Gifu University Graduate School of Medicine Gifu Japan
| | - M. Kono
- Department of Dermatology Nagoya University Graduate School of Medicine Nagoya Japan
| | - H. Shimizu
- Department of Dermatology Hokkaido University Graduate School of Medicine Sapporo Japan
| | - T. Ogi
- Department of Genetics Research Institute of Environmental Medicine Nagoya University Nagoya Japan
| | - M. Akiyama
- Department of Dermatology Nagoya University Graduate School of Medicine Nagoya Japan
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44
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Taki T, Takeichi T, Kono M, Sugiura K, Sugimura Y, Ishii N, Hashimoto T, Akiyama M. A patient with bullous pemphigoid with mucosal involvement serologically positive for anti‐BP230 autoantibodies only. Br J Dermatol 2019; 182:221-223. [DOI: 10.1111/bjd.18343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- T. Taki
- Department of Dermatology Nagoya University Graduate School of Medicine 65 Tsurumai‐cho, Showa‐ku Nagoya Aichi 466‐8550 Japan
| | - T. Takeichi
- Department of Dermatology Nagoya University Graduate School of Medicine 65 Tsurumai‐cho, Showa‐ku Nagoya Aichi 466‐8550 Japan
| | - M. Kono
- Department of Dermatology Nagoya University Graduate School of Medicine 65 Tsurumai‐cho, Showa‐ku Nagoya Aichi 466‐8550 Japan
| | - K. Sugiura
- Department of Dermatology Fujita Health University School of Medicine 1‐98 Dengakugakubo, Kutsukake‐cho Toyoake Aichi 470‐1192 Japan
| | - Y. Sugimura
- Department of Dermatology National Hospital Organization Nagoya Medical Center 4‐1‐1, Sannomaru, Naka‐ku Nagoya Aichi 460‐0001 Japan
| | - N. Ishii
- Department of Dermatology Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology 67 Asahimachi Kurume Fukuoka 830‐0011 Japan
| | - T. Hashimoto
- Department of Dermatology Osaka City University Graduate School of Medicine 1‐4‐3 Asahimachi, Abeno‐ku Osaka 545‐8585 Japan
| | - M. Akiyama
- Department of Dermatology Nagoya University Graduate School of Medicine 65 Tsurumai‐cho, Showa‐ku Nagoya Aichi 466‐8550 Japan
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45
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Taki T, Takeichi T, Sugiura K, Akiyama M. 195 Roles of aberrant hemichannel activities due to mutant connexin26 in the pathogenesis of KID syndrome. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.196] [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: 10/26/2022]
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46
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Miyauchi T, Nomura T, Suzuki S, Takeda M, Peh J, Natsuga K, Fujita Y, Nishie W, Akiyama M, Shimizu H. 293 Pityriasis rubra pilaris type V with a heterozygous mutation in CARD14. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.294] [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: 10/26/2022]
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47
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Yoshikawa T, Takeichi T, Suga Y, Kitajima Y, Akiyama M. Unique reticular hyperkeratotic eruptions seen in a patient with Darier's disease and attention deficit hyperactivity disorder. J Eur Acad Dermatol Venereol 2019; 34:e41-e43. [PMID: 31430409 DOI: 10.1111/jdv.15892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T Yoshikawa
- Departments of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Takeichi
- Departments of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Suga
- Department of Dermatology, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Y Kitajima
- Department of Dermatology, Kizawa Memorial Hospital, Minokamo, Japan
| | - M Akiyama
- Departments of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Dittmer MR, Ogawa-Momohara M, Muro Y, Kono M, Akiyama M. Remodelling of calcinosis cutis in a patient with scleroderma overlap syndrome. J Eur Acad Dermatol Venereol 2019; 34:e20-e21. [PMID: 31407385 DOI: 10.1111/jdv.15864] [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: 11/28/2022]
Affiliation(s)
- M R Dittmer
- Transitional Year Program, Aurora St. Luke's Medical Center, Milwaukee, WI, USA
| | - M Ogawa-Momohara
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Kono
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Akiyama M, Bray N. Increased healthcare costs for filaggrin-related eczema and asthma: hope for targeted management and prevention. Br J Dermatol 2019; 179:564-565. [PMID: 30222895 DOI: 10.1111/bjd.16819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - N Bray
- Centre for Health Economics and Medicines Evaluation, Bangor University, Bangor, U.K
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Akiyama M, Unoki T, Shinkai Y, Ishii I, Ida T, Akaike T, Yamamoto M, Kumagai Y. Environmental Electrophile-Mediated Toxicity in Mice Lacking Nrf2, CSE, or Both. Environ Health Perspect 2019; 127:67002. [PMID: 31166132 PMCID: PMC6794492 DOI: 10.1289/ehp4949] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 06/01/2023]
Abstract
BACKGROUND Transcription factor Nrf2 (nuclear factor-erythroid 2-related factor 2) plays a key role in detoxification of electrophiles via formation of glutathione (GSH) adducts and subsequent excretion into extracellular spaces. We found that reactive sulfur species (RSS), such as cysteine persulfides produced by cystathionine [Formula: see text] (CSE), capture environmental electrophiles through formation of sulfur adducts. However, contributions of Nrf2 and CSE to the blockage of environmental electrophile-mediated toxicity remain to be evaluated. OBJECTIVES The aim of this study was to clarify roles that CSE and Nrf2 play in the protection against various environmental electrophiles. We also wished to clarify the molecular basis of the developmental window of toxicity through investigating expression levels of Nrf2, RSS-producing enzymes, and sulfur nucleophiles during developmental stages of mice. METHODS Wild-type (WT), CSE knockout (KO), Nrf2 KO, Nrf2/CSE double KO (DKO) mice, and their primary hepatocytes were analyzed in this study. Cadmium (Cd), methylmercury (MeHg), 1,4-naphthoquinone, crotonaldehyde, and acrylamide were used. We conducted Western blotting, real-time polymerase chain reaction (PCR), 3-(4,5-dimethylthiazol-2-yl)-2,5-triphenyl tetrazolium bromide (MTT) assays, liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) analysis, alanine transaminase (ALT) activity, histopathological analysis, and rotarod test. RESULTS Primary hepatocytes from DKO mice were significantly more sensitive to the environmental electrophiles than each single KO counterpart. Both Nrf2 and CSE single KO mice were highly susceptible to Cd and MeHg, and such sensitivity was further exacerbated in the DKO mice. Lower-level expressions of CSE and sulfur nucleophiles than those in adult mice were observed in a window of developmental stage. CONCLUSIONS Our mouse model provided new insights into the response to environmental electrophiles; while Nrf2 is recognized as a key transcription factor for detoxification of environmental electrophiles, CSE is crucial factor to repress their toxicity in a parallel mode. In addition, the sensitivity of fetuses to MeHg appears to be, at least in part, associated with the restricted production of RSS due to low-level expression of CSE. https://doi.org/10.1289/EHP4949.
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Affiliation(s)
- Masahiro Akiyama
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Takamitsu Unoki
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
- Department of Basic Medical Sciences, National Institute for Minamata Disease, Minamata, Japan
| | - Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Isao Ishii
- Laboratory of Health Chemistry, Showa Pharmaceutical University, Tokyo, Japan
| | - Tomoaki Ida
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takaaki Akaike
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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