1
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Sato K, Ikagawa Y, Niwa R, Nishioka H, Horie M, Iwahashi H. Genome Sequencing Unveils Nomadic Traits of Lactiplantibacillus plantarum in Japanese Post-Fermented Tea. Curr Microbiol 2023; 81:52. [PMID: 38155273 DOI: 10.1007/s00284-023-03566-9] [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] [Received: 08/08/2023] [Accepted: 11/17/2023] [Indexed: 12/30/2023]
Abstract
Post-fermented tea production involving microbial fermentation is limited to a few regions, such as Southeast Asia and Japan, with Japan's Shikoku island being particularly prominent. Lactiplantibacillus plantarum was the dominant species found in tea leaves after anaerobic fermentation of Awa-bancha in Miyoshi City, Tokushima, and Ishizuchi-kurocha in Ehime. Although the draft genome of L. plantarum from Japanese post-fermented tea has been previously reported, its genetic diversity requires further exploration. In this study, whole-genome sequencing was conducted on four L. plantarum strains isolated from Japanese post-fermented tea using nanopore sequencing. These isolates were then compared with other sources to examine their genetic diversity revealing that L. plantarum isolated from Japanese post-fermented tea contained several highly variable gene regions associated with sugar metabolism and transportation. However, no source-specific genes or clusters were identified within accessory or core gene regions. This study indicates that L. plantarum possesses high genetic diversity and that the unique environment of Japanese post-fermented tea does not appear to exert selective pressure on L. plantarum growth.
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Affiliation(s)
- Kyoka Sato
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, Gifu, 501-1193, Japan.
| | - Yuichiro Ikagawa
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, Gifu, 501-1193, Japan
| | - Ryo Niwa
- Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Hiroki Nishioka
- Food and Biotechnology Division, Tokushima Prefectural Industrial Technology Center, Tokushima, 770-8021, Japan
| | - Masanori Horie
- Health and Medical Research Institute (HMRI), National Institute of Advanced Industrial Science and Technology (AIST), Kagawa, 761-0395, Japan
| | - Hitoshi Iwahashi
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, Gifu, 501-1193, Japan.
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2
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Sugiura Y, Yamada E, Horie M. Fabrication of hydrophilic polymer-hybrid octacalcium phosphate blocks under wet condition based on cement setting reactions. J Mech Behav Biomed Mater 2023; 148:106226. [PMID: 37952506 DOI: 10.1016/j.jmbbm.2023.106226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
Bioceramics, while offering excellent biocompatibility, are often compromised by their fragility and brittleness, especially under wet conditions. Even though recent hybrid processes combining biocompatible polymers and bioceramics have shown promise, complete mitigation of these challenges remains elusive. In this research, a biomimetic process was employed to mimic the structure of biological bone tissue. This led to the development of block materials composed of octacalcium phosphate (OCP) and sodium polyacrylic acid (PAA-Na) that display flexibility and resilience in wet conditions. Adjusting the PAA-Na concentration enabled the OCP-PAA-Na blocks to demonstrate superior mechanical strength when dry and increased flexibility when wet. Notably, these blocks expanded in aqueous solutions while preserving their structure, making them ideal for oral surgeries by preventing issues like blood flooding from implanted areas.
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Affiliation(s)
- Yuki Sugiura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan; Research Planning Office, Headquarter of Department of Life and Biotechnology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, Ibaragi, 305-8560, Japan.
| | - Etsuko Yamada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
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3
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Horie M, Fujita K, Endoh S, Sugino S, Maru J, Moriyama A, Ogura I. Contaminant microorganisms in the in vitro evaluation of cellular responses of cellulose nanofibers and their microbial inactivation using gamma irradiation. Toxicol Mech Methods 2023; 33:741-754. [PMID: 37496379 DOI: 10.1080/15376516.2023.2238061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/09/2023] [Accepted: 06/09/2023] [Indexed: 07/28/2023]
Abstract
Cellulose nanofibers (CNFs) are fibrous nanomaterials produced from plants. Since some nanomaterials are toxic, toxicity evaluation, including in vitro examinations using cultured cells, is essential for the effective use of CNFs. On the other hand, microorganisms in the environment can contaminate CNF suspensions. The contamination of CNF samples and the effects of contaminating microorganisms on in vitro examinations were investigated in this study. Microorganism contamination in CNF samples was examined, and microbial inactivation of CNF suspensions using gamma irradiation was evaluated. After gamma-ray irradiation at absorbed doses of 0.5, 1, 5, and 10 kGy, the cellular effects of CNF suspensions were examined using 6 types of cultured cell, HaCaT, A549, Caco-2, MeT-5A, THP-1, and NR8383 cells. CNF samples were contaminated with bacteria and CNF suspensions exhibited endotoxin activity. Gamma irradiation effectively inactivated the microorganisms contained in the CNF suspensions. When the absorbed dose was 10 kGy, the fiber length of CNF was shortened, but the effect on CNF was small at 1.0 kGy or less. CNF suspensions showed lipopolysaccharides (LPS)-like cellular responses and strongly induced interleukin-8, especially in macrophages. Absorbed doses of at least 10 kGy did not affect the LPS-like activity. In this study, it was shown that the CNF suspension may be contaminated with microorganisms. Gamma irradiation was effective for microbial inactivation of suspension for invitor toxicity evaluation of CNF. In vitro evaluation of CNFs requires attention to the effects of contaminants such as LPS.
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Affiliation(s)
- Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Katsuhide Fujita
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Shigehisa Endoh
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Sakiko Sugino
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Junko Maru
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Akihiro Moriyama
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Isamu Ogura
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
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4
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Sugiura Y, Yamada E, Horie M. Interlayer expansion of octacalcium phosphate via forced oxidation of the intercalated molecules within its interlayers. Phys Chem Chem Phys 2023; 25:26640-26647. [PMID: 37772427 DOI: 10.1039/d3cp01992f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Octacalcium phosphate (OCP), a precursor to apatite, has a layered structure that allows various molecules to be intercalated within its interlayers. Previous research on the phase conversion process of OCP to apatite indicated that the layered structures typically collapse due to the shrinking of the OCP layers. In contrast, this study presents a novel phenomenon involving OCP layer expansion during phase conversion. This expansion is based on a forced oxidation process of the intercalated molecules within the hydrous layers of OCP. By introducing NaClO to an OCP interlayer containing dithiodiglycolic acid (DSG), the OCP layers are expanded. This process involves DSG decomposition through its reaction with NaClO. Specifically, the process occurs when a DSG-substituted OCP (containing disulfide bonds (-S-S-)) is immersed in a NaClO solution. This is the first study to report the expansion phenomenon during the phase conversion process from OCP to apatite, providing a new perspective to the conventional understanding that these layers only shrink.
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Affiliation(s)
- Yuki Sugiura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan.
- Research Planning Office, Headquarter of Department of Life Science and Biotechnology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-3305, Japan
| | - Etsuko Yamada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan.
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan.
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Sugiura Y, Tobita N, Tobita T, Taga M, Nakachi S, Yokota K, Yamada E, Horie M, Momma K, Matsubara S. Oil Inclusions Found in Skeleton Crystals of Quartz Indicated the Existence of Organic Matter Surrounding Ancient Growth Environments. ACS Omega 2023; 8:21464-21473. [PMID: 37360484 PMCID: PMC10286290 DOI: 10.1021/acsomega.3c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 05/18/2023] [Indexed: 06/28/2023]
Abstract
In nature, minerals record various origins and information for geology and geobiochemistry. Here, we investigated the origin of organic matter and growth mechanism of quartz with oil inclusion revealing fluorescence under short ultraviolet (UV) light, obtained from the clay vein at Shimanto-cho, Kochi, Shikoku Island, Japan. Geological investigation indicated that the oil-quartz was formed in hydrothermal metamorphic veins found in the late Cretaceous interbedded sandstone and mudstone. The obtained oil-quartz crystals are mostly double-terminated. Micro-X-ray computed tomography (microCT) indicated that oil-quartz crystals have various veins originating as skeleton structures along the quartz crystal {111} and {1-11} faces. Spectroscopic and chromatographic studies indicated that aromatic ester and tetraterpene (lycopene) molecules, which revealed fluorescence, were detected. Large molecular weight sterol molecules, such as C40, were also detected in the vein of oil-quartz. This investigation indicated that organic inclusions in mineral crystals would form with ancient microorganism culture environments.
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Affiliation(s)
- Yuki Sugiura
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-3095, Kagawa, Japan
- Research
Planning Office, Headquarters of Department of Life Science and Biotechnology, National Institute of Advanced Industrial Science
and Technology (AIST), 1-1-1, Umezono, Tsukuba 305-0035, Ibaraki, Japan
| | - Naoko Tobita
- Friends
of Mineral, 4-13-18,
Toyotama-naka, Nerima, Tokyo 176-0013, Japan
| | - Takashi Tobita
- Friends
of Mineral, 4-13-18,
Toyotama-naka, Nerima, Tokyo 176-0013, Japan
| | - Masaru Taga
- Faculty
of Agriculture, Ryukoku University, 1-5, Yokotani, Seta-Ohe, Ohtsu, Shiga, Japan 520-2194
| | - Shu Nakachi
- Natural
History Lab., 120 Suoh-kata, Ohtsuki-Town, Hata, Kochi 788-0313, Japan
| | - Kazumichi Yokota
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-3095, Kagawa, Japan
| | - Etsuko Yamada
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-3095, Kagawa, Japan
| | - Masanori Horie
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-3095, Kagawa, Japan
| | - Koichi Momma
- Department
of Geology and Paleontology, National Museum
of Nature and Science, 4-1-1, Amakubo, Tsukuba 305-0005, Ibaraki, Japan
| | - Satoshi Matsubara
- Department
of Geology and Paleontology, National Museum
of Nature and Science, 4-1-1, Amakubo, Tsukuba 305-0005, Ibaraki, Japan
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6
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Horie M, Kato H, Nakamura A, Kadota Y, Izumi N. Evaluation of the cellular effects of silica particles used for dermal application. J Toxicol Environ Health A 2023; 86:326-345. [PMID: 37016508 DOI: 10.1080/15287394.2023.2198577] [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] [Indexed: 05/26/2023]
Abstract
The cellular effects of 5 types of spherical amorphous silica particles whose particle size were 4.2-12.8 μm for cosmetic use and two types of crystalline silica whose particle size were 2.4 and 7.1 μm particles for industrial use were examined. These silica particles were applied to HaCaT human keratinocytes for 24 hr. Crystalline silica enhanced IL-8 and IL-6 expression and caused cell membrane damage. Crystalline silica also enhanced HO-1 gene expression; however, the level of intracellular ROS did not change. Compared with crystalline silica, the cellular effects of the spherical silica employed in this study were minor. Cellular uptake of particles was observed for all of silica particle types. Cellular uptake of crystalline silica was observed 1 hr after exposure, and internalized silica particles were present in the cytoplasm. When HaCaT cells were exposed to crystalline silica for 1 hr and incubated for 23 hr in culture medium without silica particles, IL-8 expression was still detected. In addition, silica particles exerted negligible effects using a 3D skin tissue model. Thus, the following conclusions may be drawn. (1) cellular effects exerted by spherical silica are less compared to crystalline silica. (2) phagocytosis of particles is an important first step in the cellular effects of silica particles. (3) spherical silica particles might exert little, if any, effect on healthy skin attributed to no apparent cellular uptake.
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Affiliation(s)
- Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Haruhisa Kato
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Ayako Nakamura
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Yutaka Kadota
- CSR Division, AGC-Si-Tech Co. Ltd, Kitakyushu, Fukuoka, Japan
| | - Naoyuki Izumi
- CSR Division, AGC-Si-Tech Co. Ltd, Kitakyushu, Fukuoka, Japan
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7
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Horie M, Chiba R, Umemoto S, Tajika M. Particulate beta-tricalcium phosphate and hydroxyapatite doped with silver promote in vitro osteoblast differentiation in MC3T3-E1 cells. Biomed Mater Eng 2023; 34:385-398. [PMID: 37125541 DOI: 10.3233/bme-211376] [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: 05/02/2023]
Abstract
BACKGROUND Calcium phosphates including β-tricalcium phosphate (β-TCP) and hydroxyapatite (HAp) have been widely used for bone regeneration application because of their high osteoconductive activities. In addition, various kinds of inorganic ions enhance differentiation, proliferation, and mineralization of osteoblasts. However, information about the effects of silver-doped β-TCP [β-TCP (Ag)] and HAp [HAp (Ag)] particles on osteogenic differentiation is not available yet. OBJECTIVE We focused on the impact of β-TCP (Ag) and HAp (Ag) particles on the osteogenic differentiation of MC3T3-E1 osteoblast precursor cells. METHODS MC3T3-E1 osteoblast precursor cells were pre-treated by β-TCP (Ag) or HAp (Ag). And then the medium was changed to differentiation medium. Subsequently, osteoblast differentiation-related markers were determined. RESULTS We found that treatment with β-TCP (Ag) or HAp (Ag) particles increased alkaline phosphatase activity in MC3T3-E1 cells. Expression of osteoblast differentiation-related genes also increased after treatment with β-TCP (Ag) or HAp (Ag) particles, a response thought to be regulated by zinc finger-containing transcription factor osterix. The ratio of the receptor activator of nuclear factor kappa-B ligand (RANKL) to osteoprotegerin (OPG) was decreased by β-TCP (Ag) and HAp (Ag) particles. CONCLUSION Silver doping of β-TCP and HAp particles is effective for bone regeneration.
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Affiliation(s)
- Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
| | - Ryo Chiba
- Shiraishi Central Laboratories Co., Ltd., Amagasaki, Japan
| | - Shota Umemoto
- Shiraishi Central Laboratories Co., Ltd., Amagasaki, Japan
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Horie M, Sugino S, Ohno T. Follow the time course of inflammation caused by intraperitoneal administration of multi-wall carbon nanotubes in mice. Int J Immunopathol Pharmacol 2023; 37:3946320231176402. [PMID: 37846071 PMCID: PMC10583511 DOI: 10.1177/03946320231176402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 04/26/2023] [Indexed: 10/18/2023] Open
Abstract
OBJECTIVE Understand the progress of inflammation over time caused by multi-walled carbon nanotubes (MWCNT). METHODS Two types of MWCNTs were administered to C57BL/6N mice via intraperitoneal administration at low and high doses (0.05 and 1.0 mg/mouse, respectively). Inflammation was evaluated until 6 months after administration based on cytokine levels and pathological observations. The abdominal cavity lavage fluid was collected and analyzed 1 week, 1, 3, and 6 month(s) after administration. IL-6 expression markedly increased 3 months after the administration of high-dose MWCNT-7. RESULTS Notable inflammation was observed in the groups administered with one of the MWCNT, MWCNT-7. On the other hand, inflammation in another MWCNT-treated group was milder than that in the MWCNT-7-treated group. MWCNT-7 induced pronounced inflammation but did not induce tumor formation during the experimental period. Inflammation reaction is one of the most important biological responses to MWCNT. CONCLUSION Three months post-exposure becomes a turning point for the harmful effects of the intraperitoneally administered MWCNT-7.
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Affiliation(s)
- Masanori Horie
- Health and medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
| | - Sakiko Sugino
- Health and medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
| | - Tomoki Ohno
- Health and medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
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Fukuyama M, Horie M, Kato K, Ozawa T, Fujii Y, Okuyama Y, Makiyama T, Ohno S, Nakagawa Y. Calmodulinopathy is a common cause of critical cardiac phenotypes in fetus and infancy. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Cardiac calmodulinopathy is a life-threatening arrhythmia syndrome which presents several phenotypes of inherited primary arrhythmia syndrome (IPAS), and caused by mutations in calmodulin-encoded genes (CALM1–3). We aimed clarify the frequency and their clinical characteristics of calmodulinopathy in our IPAS cohort.
Methods
By using next generation sequencing, we screened arrhythmia related genes including calmodulin-encoding genes in 322 unrelated symptomatic children (0–12 years) who were suspected as IPAS; they included 40 cases with lethal arrhythmic attacks (LAE) under 6-year-old. After gene screening, we investigated their physiological and clinical characteristics about mutation carriers.
Results
Among 322 children, we identified 6 mutations of calmodulin-encoded genes in 9 probands (2.8%); one CALM1 in 2 probands (N98S), and 5 CALM2 in 7 probands (E46K, D96V, D96G, N98S, E141K). Their clinical diagnoses were long QT syndrome (LQTS, n=4), catecholaminergic polymorphic ventricular tachycardia (CPVT, n=3) and both (n=2). Their age of diagnosis ranges at 0–9 with the median of 5 years. There were three major clinical phenotypes; 1) CALM2-D96V, and E141K: two infants with advanced atrio-ventricular block, significant QTc prolongation, severe heart failure from their fetal period – both of them deceased within 1.5-year-old. Their clinical phenotypes resembled classical Timothy syndrome caused by CACNA1C mutations. 2) CALM1-N98S (n=2), CALM2-N98S (n=2), and CALM2-D96G: four preschoolers with LAEs and one syncope: all of them were 3–5 years old. In addition, a T wave morphology of CALM2-D96G carrier was very similar to LQT1. 3) CALM2-E46K (n=2): two were first diagnosed with neurological and developmental disorders, and showed phenotype of CPVT: their cardiac phenotypes were milder compared with that of 1) or 2). Overall, these phenotypes seemed to be mutation specific (indicated in figure). Their cardiac features were severer, and the onset of LAEs was earlier compared with other genotypes of LQTS/CPVT. As the treatment, β-blocker was effective for control of LAEs.
Conclusion
Cardiac calmodulinopathy presented serious and potentially lethal phenotypes in fetus or infancy. To prevent cardiac death in them, we must correctly diagnose and start the treatment as earlier as possible.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): MEXT KAKENHI from the Ministry of Education, Culture, Sports, Science, and Technology of Japan
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Affiliation(s)
- M Fukuyama
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
| | - M Horie
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
| | - K Kato
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
| | - T Ozawa
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
| | - Y Fujii
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
| | - Y Okuyama
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
| | - T Makiyama
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine , Kyoto , Japan
| | - S Ohno
- National Cerebral and Cardiovascular Center, Department of Bioscience and Genetics , Osaka , Japan
| | - Y Nakagawa
- Shiga University of Medical Science, Department of Cardiovascular Medicine , Otsu , Japan
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10
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Sonoda K, Nagase S, Aiba T, Kato K, Shiga T, Kusano K, Horie M, Ohno S. Different prognosis of ARVC patients between DSG2 and PKP2 variant carriers. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiomyopathy mainly caused by desmosomal gene variants. In Europe and North America, pathogenic variants in PKP2 were identified in most of the ARVC patients. On the other hand, we have reported that the genetic backgrounds of ARVC in Japanese were different from those in European; pathogenic variants in DSG2 were predominant in Japanese. Genotype-phenotype correlations, however, have not been clarified yet.
Purpose
In this study, we aimed to examine whether the genotype affect the phenotype and outcome in Japanese ARVC patients.
Methods and results
This study included 167 Japanese ARVC patients who received genetic testing (128 males [77%]). Their median age at diagnosis was 44 [24–55] years old and median follow-up duration was 10 [4–21] years. We found 90 patients with pathogenic variants: 52 in DSG2 (31%), 30 in PKP2 (18%), 3 in DSP (1.8%), 1 in DSC (0.6%), 1 in JUP (0.6%) and 3 in DES (1.8%). The age of the first sustained ventricular arrhythmia (SVT) were older in the patients with DSG2 than those with PKP2 variants (48±15 years vs. 35±15 years, P=0.008) but younger in DSG2 variant carriers at the first hospitalization for heart failure (41 [22–61] years vs. 67 [61–74] years, P=0.03). The left ventricular ejection fractions of DSG2 variant carriers were significantly lower at diagnosis than that of PKP2 (52 [41–60] % vs. 61 [56–66] %, P=0.002). Kaplan-Meier survival curve for lethal arrhythmic events including SVT, ventricular fibrillation and sudden death revealed that the event rate of DSG2 variant carriers was significantly lower than that of PKP2 (log-rank test, P=0.02) (Fig. 1).
Among 11 patients who had both SVT and hospitalizations for HF, 7 PKP2 variant carriers had SVT first, then, hospitalized for HF (48 [35–53] years and 67 [55–71] years, P=0.02). Contrary, the clinical course of 4 DSG2 variants carriers were different from those with PKP2 (54 [40–68] years for SVT and 65 [56–70, P=0.1] years for HF) (Fig. 2).
Conclusion
The patients with DSG2, which is the major causative gene for ARVC in Japanese, show different phenotype and outcome from those with PKP2. We should examine the effect of variants on the prognosis of ARVC patients in more large population including various ethnics.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- K Sonoda
- National Cerebral & Cardiovascular Center , Suita , Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center , Suita , Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center , Suita , Japan
| | - K Kato
- Shiga University of Medical Science, Department of Cardiovascular and Respiratory Medicine , Shiga , Japan
| | - T Shiga
- Tokyo Women's Medical University , Tokyo , Japan
| | - K Kusano
- National Cerebral & Cardiovascular Center , Suita , Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia , Otsu , Japan
| | - S Ohno
- National Cerebral & Cardiovascular Center , Suita , Japan
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11
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Sugiura Y, Yamada E, Horie M. Fabrication of octacalcium phosphate block through the reaction between CaCO 3 powder and phosphate acid. CHEM LETT 2022. [DOI: 10.1246/cl.220238] [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: 11/12/2022]
Affiliation(s)
- Yuki Sugiura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa 761-3095
| | - Etsuko Yamada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa 761-3095
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa 761-3095
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12
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Sugiura Y, Horie M. Fabrication of interconnected porous Ag substituted octacalcium phosphate blocks based on a dissolution-precipitation reaction. J Mater Sci Mater Med 2022; 33:48. [PMID: 35639182 PMCID: PMC9156480 DOI: 10.1007/s10856-022-06672-5] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Here, we introduce Ag substituted octacalcium phosphate (OCP-Ag) blocks with interconnected porous structure and sufficient mechanical strength as bone substitute (i.e., foam). We employed a two-step process for fabrication, which includes a setting reaction for acidic calcium phosphate granules using an acidic phosphate solution and a phase conversion process via dissolution-precipitation method in cocktail ((NH4)2HPO4-NH4NO3-NaNO3-AgNO3) solutions. The Ag contents in the fabricated OCP-Ag foams were 0.08-0.15 at%, which were sufficient in exhibiting contact antibacterial ability. The mechanical strength and porosity of the OCP-Ag foams were about 0.5 MPa and 70%, respectively. These values were sufficient for the application of the OCP-Ag foams as bone substitute. Graphical abstract.
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Affiliation(s)
- Yuki Sugiura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan.
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
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13
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Abstract
The lactic acid bacteria involved in fermentation and components in the tea leaves of Awa-bancha, a post-fermented tea produced in Naka, Kamikatsu, and Miyoshi, Tokushima, were investigated in the present study. Lactic acid bacteria were isolated from tea leaves after anaerobic fermentation and identified by multiplex PCR targeting of the recA gene and 16S ribosomal RNA gene homology. Lactiplantibacillus pentosus was the most frequently isolated species in Naka and Kamikatsu and Lactiplantibacillus plantarum in Miyoshi. In the phylogenetic tree based on the dnaK gene, L. pentosus isolated from Awa-bancha was roughly grouped by the production area and producer. The bacterial flora after anaerobic fermentation was dominated by Lactiplantibacillus spp. for most producers, and the compositions of samples from each producer varied. Organic acids, free amino acids, and catechins were analyzed as components related to the flavor of Awa-bancha. These components were unique to each producer. The present results revealed diversity in the lactic acid bacteria and flavor of Awa-bancha that depended on the producer.
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Affiliation(s)
- Hiroki Nishioka
- Food and Biotechnology Division, Tokushima Prefectural Industrial Technology Center.,United Graduate School of Agricultural Science, Gifu University
| | - Tomoki Ohno
- The Graduate School of Natural Science and Technology, Gifu University
| | | | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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14
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Li Z, Jiang L, Wei L, Ohno T, Syaputri Y, Horie M, Iwahashi H. Controlling the Microbial Composition during the Fermentation of Ishizuchi-kurocha. Biosci Biotechnol Biochem 2021; 86:117-124. [PMID: 34669923 DOI: 10.1093/bbb/zbab184] [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: 03/08/2021] [Accepted: 07/12/2021] [Indexed: 11/12/2022]
Abstract
Ishizuchi-kurocha is a popular post-fermented tea in Japan. It is performed by domestic and natural fermentation relied on microorganisms derived from tea leaves or the environment of the manufacturing. Ishizuchi-kurocha undergoes aerobic fermentation of fungi first, then secondly fermented by anaerobic fermentation of lactic acid bacteria during natural fermentation processing. Aspergillus niger which produce mycotoxin is included in natural fermentation. This research aimed to build a novel fermentation method of Ishizuchi-kurocha by adding industrial koji fungi products and laboratory cultivated Lactobacillus plantarum (Lactiplantibacillus plantarum) artificially. Thus, safety and quality of tea products could be controlled simply. We found artificial fermentation of Ishizuchi-kurocha could get high lactic acid production within eight days. Final products only consisted of genus Aspergillus and genus Lactobacillus. while harmful Aspergillus niger was not found. However, artificial fermentation methods also decreased the content of polyphenols when compared with commercial tea.
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Affiliation(s)
- Zuoqian Li
- Graduate School of Applied Biological Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan
| | - Lei Jiang
- United Graduate School of Agricultural Science, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan.,Department of Biology, Faculty of Mathematics and Natural Sciences, Padjadjaran University. Jl. Raya Bandung - Sumedang Km-21, 45361, Jatinangor, Sumedang West Java, Indonesia
| | - Lingdong Wei
- School of Inspection and Testing Certification, Changzhou Vocational Institute of Engineering, Changzhou, China
| | - Tomoki Ohno
- Graduate School of Applied Biological Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan
| | - Yolani Syaputri
- United Graduate School of Agricultural Science, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan.,Department of Biology, Faculty of Mathematics and Natural Sciences, Padjadjaran University. Jl. Raya Bandung - Sumedang Km-21, 45361, Jatinangor, Sumedang West Java, Indonesia
| | - Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Hitoshi Iwahashi
- Laboratory of Applied Microbiology, Faculty of Applied Biological Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan
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15
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Sonoda K, Nagase S, Aiba T, Fukuyama M, Kato K, Kusano K, Horie M, Ohno S. Early onset of heart failure in Japanese ARVC patients with pathogenic desmosomal gene variants. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiomyopathy mainly caused by desmosomal gene variants. Although there are a lot of reports regarding to European ARVC patients, the ones in Asian are a few, and the characteristics of Asian ARVC have been still unclear. We have reported that the genetic backgrounds in Japanese ARVC patients were different from those in European ones. In this study, we aimed to examine the phenotype and outcome of Japanese ARVC patients with specific genetic backgrounds.
Methods and results
This study included 104 Japanese ARVC patients who were diagnosed as definite in the 2010 Task Force Criteria for ARVC and received genetic analysis (79 males [76%]; median age at diagnosis, 40 years [IQR 22–53 years].) Fifty-seven patients carried variants in desmosomal genes classified as pathogenic based on ACMG guideline: 30 in DSG2 (29%), 22 in PKP2 (21%), 2 in DSC2 (2%) and 3 in DSP (3%). The median age of diagnosis was significantly younger in the patients with the pathogenic variants than in those without (37 years [IQR 21–49 years] vs. 46 years [IQR 34–58 years], P=0.01). During a median follow-up of 9.3 years (IQR 3.5–20.9 years), 10 patients died and 2 were received heart transplantation. Sixty-two suffered lethal arrhythmic events including cardiopulmonary arrest, ventricular fibrillation, sustained ventricular tachycardia and appropriate shocks by implantable cardioverter defibrillator. Twenty-two were hospitalized for heart failure. There was no difference in these events rate between the two groups. However, survival analysis revealed that patients with pathogenic variants hospitalized for heart failure significantly earlier in their life than those without (P=0.04, log-rank test, Figure 1).
Conclusions
The Japanese ARVC patients with pathogenic variants in desmosomal genes are diagnosed and hospitalize for heart failure at younger age than those without. These findings have not been reported in other ethnics. Our study warns that we should be cautious for not only the prevention of lethal arrhythmic events but also the progress of the heart failure in Japanese ARVC patients with pathogenic variants.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Japan Agency for Medical Research and Development Figure 1
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Affiliation(s)
- K Sonoda
- National Cerebral & Cardiovascular Center, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Suita, Japan
| | - M Fukuyama
- Shiga University of Medical Science, Department of Cardiovascular and Respiratory Medicine, Shiga, Japan
| | - K Kato
- Shiga University of Medical Science, Department of Cardiovascular and Respiratory Medicine, Shiga, Japan
| | - K Kusano
- National Cerebral & Cardiovascular Center, Suita, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Otsu, Japan
| | - S Ohno
- National Cerebral & Cardiovascular Center, Suita, Japan
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16
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Shimizu K, Horie M, Tabei Y, Kashiwada S. Proinflammatory response caused by lead nanoparticles triggered by engulfed nanoparticles. Environ Toxicol 2021; 36:2040-2050. [PMID: 34189835 DOI: 10.1002/tox.23321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
In this study, the cellular effects of lead (Pb) nanoparticles with a primary particle size of 80 nm were evaluated in two types of cell lines: human lung carcinoma A549 and macrophage-differentiated THP-1 cells (dTHP-1). The cellular responses induced by the Pb nanoparticles varied among the cell types. Exposure to Pb nanoparticles for 24 h at a concentration of 100 μg/ml induced interleukin-8 (IL-8) expression in dTHP-1 cells. Induction of IL-8 expression in A549 was lower than dTHP-1 cells. Pb nanoparticles also induced the gene expression of heme oxygenase-1 in dTHP-1 cells but not in A549 cells. Though cellular uptake of Pb nanoparticles was observed in both the cell types, the amount of internalized Pb particles was lower in A549 cells than that in dTHP-1 cells. Gene expression of metallothionein 2A was remarkably enhanced by Pb nanoparticle exposure in dTHP-1 cells. Compared with Pb nanoparticles, induction of cytokines caused by lead nitrate (Pb[NO3 ]2 ), a water-soluble Pb compound, was smaller. In conclusion, the present study revealed that Pb nanoparticles induced a stronger cellular response than Pb(NO3 )2 , primarily by eliciting cytokine production, in a cell type-dependent manner.
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Affiliation(s)
- Kaori Shimizu
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
- Graduate School of Life Sciences, Toyo University, Itakura, Gunma, Japan
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Yosuke Tabei
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Shosaku Kashiwada
- Graduate School of Life Sciences, Toyo University, Itakura, Gunma, Japan
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17
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Horie M, Sugino S, Tada A, Nara K. Groundnut ( Apios americana Medik) Extract Enhances the Osteoblast Differentiation of MC3T3-E1 Cells. Nat Prod Commun 2021. [DOI: 10.1177/1934578x211010567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The effects of groundnut ( Apios americana Medik) extract on osteoblast differentiation were examined using MC3T3-E1 cells. MC3T3-E1 cells were treated with the crude extract along with other differentiating reagents. The alkaline phosphatase (ALP) activity of cells cultured in a differentiation medium supplemented with 0.01% crude groundnut extract was 1.5‐1.6 times higher than that of cells cultured in a differentiation medium without the extract. Crude groundnut extract was further separated into aqueous and methanol fractions. The methanol fraction enhanced ALP activity, osteocalcin, integrin-binding sialoprotein, and type I collagen expression, and calcium mineralization. Conversely, the aqueous fraction did not show such effects. Groundnut extract may enhance osteoblast differentiation, and this effect is likely conferred by water insoluble substance(s).
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Affiliation(s)
- Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Sakiko Sugino
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Atsumi Tada
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Kazuhiro Nara
- Faculty of Human Life Sciences, Jissen Women’s University, Tokyo, Japan
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18
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Watanabe T, Guan Z, Horie M, Joe B, Juan M, Buhari H, Hwang D, Kolls J, Liu M, Keshavjee S, Juvet S, Juvet S, Martinu T. IL-17 Receptor on Donor Cells Regulates Acute and Chronic Lung Allograft Rejection Potentiated by Repeated Endotoxin Inhalations. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1883] [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: 11/17/2022] Open
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19
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Sugiura Y, Niitsu K, Saito Y, Endo T, Horie M. Inorganic process for wet silica-doping of calcium phosphate. RSC Adv 2021; 11:12330-12335. [PMID: 35423780 PMCID: PMC8696845 DOI: 10.1039/d1ra00288k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 01/13/2021] [Accepted: 03/24/2021] [Indexed: 11/21/2022] Open
Abstract
Silica is not only a biocompatible trace element but also an essential element for bone formation and metabolism. Therefore, it is often doped into bioceramics such as calcium phosphate and calcium carbonate for enhancing biomaterial ability. Heretofore, organic silica materials are employed as silica sources, but the residual organic matter is a significant drawback in biomaterial applications. Therefore, in this study, we introduce a one-pot inorganic synthesis method for the formation of silica-doped octacalcium phosphate (OCP) using Na2SiO3 as the silica source. Silica was intercalated into the OCP unit lattice, replacing its hydrous layer structure, and then a layer-by-layer structure of apatite and silica was formed. Furthermore, by immersing the fabricated silica-doped OCP into suitable solutions, both silica-doped hydroxyapatite and carbonate apatite were fabricated through a one-step inorganic processes. We introduced a one-pot synthesis method for silica doping of calcium phosphate. Silica easily incorporated into OCP interlayer optimizing Na2SiO3 concentrations.![]()
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Affiliation(s)
- Yuki Sugiura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) Kagawa 761-0395 Japan
| | - Kodai Niitsu
- Department of Material Science and Engineering, Kyoto University Kyoto 606-8501 Japan
| | - Yasuko Saito
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) Hiroshima 739-0046 Japan
| | - Takashi Endo
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) Hiroshima 739-0046 Japan
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) Kagawa 761-0395 Japan
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20
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Sugiura Y, Makita Y, Horie M. Ammonium-to-sodium ion-exchange process at the interlayer of octacalcium phosphate. RSC Adv 2021; 11:39503-39507. [PMID: 35492470 PMCID: PMC9044421 DOI: 10.1039/d1ra07939e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 12/04/2021] [Indexed: 01/17/2023] Open
Abstract
Octacalcium phosphate (OCP) has been considered as the layer component of calcium phosphate, but whether it achieves the ionic-exchange ability of conventional layer components is unclear. As OCP is highly biocompatible, understanding its ionic-exchange properties would potentially expand its pharmaceutical and medical applications. Herein, we demonstrate that the substituted cations in ammonium (NH4)-substituted octacalcium phosphate (OCP-NH4) and sodium (Na)-containing ammonium phosphate solutions undergo ion exchanges with OCP interlayers. Replacing NH4+ with Na+ did not alter the crystal structure of OCP, confirming that a substituted cation exchange process similar to that in other layered compounds occurs in OCP. Octacalcium phosphate (OCP) has been considered as the layer component of calcium phosphate, but whether it achieves the ionic-exchange ability of conventional layer components is unclear. In this study, we demonstrated the evidence of ionic exchange process at the interlayer of OCP.![]()
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Affiliation(s)
- Yuki Sugiura
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa, Japan, 761-0395
| | - Yoji Makita
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa, Japan, 761-0395
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu, Kagawa, Japan, 761-0395
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21
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Affiliation(s)
- Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
| | - Yosuke Tabei
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Japan
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22
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Yamamoto Y, Makiyama T, Wuriyanghai Y, Kohjitani H, Gao J, Kashiwa A, Hai H, Aizawa T, Imamura T, Ishikawa T, Yoshida Y, Ohno S, Horie M, Makita N, Kimura T. Preclinical proof-of-concept study: antisense-mediated knockdown of CALM as a therapeutic strategy for calmodulinopathy. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Calmodulin (CaM) is a ubiquitous Ca2+ sensor molecule encoded by three distinct calmodulin genes, CALM1–3, and has an important role for cardiac ion channel function. Recently, heterozygous missense mutations in CALM genes were reported to cause a new category of life-threatening genetic arrhythmias such as long-QT syndrome (LQTS) and catecholaminergic polymorphic ventricular tachycardia (CPVT), which is called as “calmodulinopathy”. The patients with calmodulinopathy show poor prognosis and there is no effective treatment for them.
Purpose
Considering the dominant-negative effect of mutant calmodulin proteins produced by heterozygous missense mutations in CALMs, we aimed to prove the concept of antisense-based therapy to treat calmodulinopathy using human iPS cell-derived cardiomyocyte (hiPSC-CM) model.
Methods
We designed multiple locked nucleic acid (LNA) gapmer-antisense oligonucleotides (ASOs) targeting CALM2 and analyzed the silencing efficiency and toxicity in cultured cells to select the most potent ASO. Using CMs differentiated from hiPSCs which were generated form a 12-year-old boy with LQTS carrying a heterozygous CALM2-N98S mutation, CALM2 expression and action potentials (APs) were analyzed to evaluate the efficacy of ASOs.
Results
We identified several ASOs which reduced CALM2 expression without affecting cell viability in human cultured cells (HepG2) (ASO 50 nM, n=2; Figure 1A). Considering further experiments in vivo mouse model, we investigated the CALM2 silencing activity in mouse cultured cells (3T3-L1) without transfection (free-uptake) (ASO 1 μM, n=2; †ASOs have homologous sequence between human and mouse; Figure B). After free-uptake CALM2 silencing analysis in 3T3-L1 cells, we identified that ASO #2 has the most potent CALM2 silencing activity and low cytotoxicity (Figure 1B). ASO #2 effectively reduced CALM2 expression even in hiPSC-CMs (ASO(−): n=3, lipofection: n=4, free-uptake: n=3; P<0.05; Figure 1C). In action potential recordings, we demonstrated that ASO #2 ameliorated prolonged AP durations (APD90) in N98S-hiPSC-CMs at 0.5 Hz pacing (ASO(−): 666±123 ms (n=7), lipofection: 329±21 ms (n=8), free-uptake: 388±34 ms (n=12); P<0.05; Figure 1D).
Conclusion
Our results using patient-derived hiPSC-CM model suggest that ASO-based therapy might be a promising strategy for the treatment of calmodulinopathy.
Figure 1
Funding Acknowledgement
Type of funding source: Private company. Main funding source(s): Nissan Chemical Corporation
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Affiliation(s)
- Y Yamamoto
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - T Makiyama
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - Y Wuriyanghai
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - H Kohjitani
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - J Gao
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - A Kashiwa
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - H Hai
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - T Aizawa
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - T Imamura
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
| | - T Ishikawa
- National Cerebral & Cardiovascular Center, Omics Research Center, Suita, Japan
| | - Y Yoshida
- Kyoto University, Center for iPS Cell Research and Application, Kyoto, Japan
| | - S Ohno
- National Cerebral & Cardiovascular Center, Department of Bioscience and Genetics, Suita, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Otsu, Japan
| | - N Makita
- National Cerebral & Cardiovascular Center, Omics Research Center, Suita, Japan
| | - T Kimura
- Kyoto University, Cardiovascular Medicine, Kyoto, Japan
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23
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Peltenburg P, Lieve K, Van Der Werf C, Wilde A, Brugada R, Till J, Ackerman M, Probst V, Haugaa K, Swan H, Kammeraad J, Horie M, Sanatani S, Schwartz P, Leenhardt A. Atenolol is not effective in reducing ventricular arrhythmia severity on exercise stress test in patients with catecholaminergic polymorphic ventricular tachycardia. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Patients with catecholaminergic polymorphic ventricular tachycardia (CPVT) are at risk for malignant ventricular arrhythmias during exercise and emotions which may lead to sudden cardiac death. Beta-blockers (BB) are the mainstay of therapy in patients with CPVT, but studies comparing the efficacy of different types of BB are scarce. Our objective was to determine the efficacy of different types of BB in reducing the ventricular arrhythmia (VA) severity on exercise stress test (EST) in patients with CPVT.
Data was derived from the International CPVT Registry, a large retrospective cohort study. We included patients who had an EST before (pre-EST) and after start of BB (post-EST). We divided the cohort into five groups based on the first prescribed BB and compared pre-EST and post-EST.
We included 428 patients (median age 18.5 [11.7–39.6] years, 240 (56.%) female), 155 (36.2%) probands) of whom 38 (8.9%) used atenolol, 131 (30.6%) bisoprolol, 82 (19.2%) metoprolol, 124 (29.0%) nadolol and 53 (12.4%) propranolol. Sex and history of aborted cardiac arrest were similar in all groups. The age at start of BB differed (p<0,001): patients using bisoprolol were oldest (35.0 [15.7–35.3]) while patients using propranolol were youngest (12.3 [8.8–24.9]). Median daily BB dose in mg/kg was: 1.0 [0.8–2.3] for atenolol, 0.06 [0.05–0.10] for bisoprolol, 0.9 [0.6–1.5] for metoprolol, 1.1 [0.9–1.6] for nadolol and 1.5 [1.1–2.8] for propranolol. Resting heart rate on pre-EST and post-EST was similar in all groups. Patients using metoprolol had a significantly higher maximum heart rate post-EST compared to nadolol and propranolol (161±18 vs 136±19 and 130±22 bpm, p=0,002 and p=0,001, respectively). The VA severity decreased significantly after BB (147 (37.9%) (non-sustained) ventricular tachycardia ((NS)VT) and 120 (30.9%) no or isolated ventricular premature beat (iVPB) pre-EST vs 46 (11.4%) (NS)VT and 184 (45.7%) iVPB post-EST, p<0,001). Examining the different groups, the VA severity decreased significantly after BB in all but atenolol (13 (40.6%) (NS)VT and 8 (25.0%) iVPB pre-EST vs 9 (25.0%) (NS)VT and 15 (41.7%) iVPB post-EST, p=0,103).
Based on these results we conclude that all beta-blockers except atenolol are effective in reducing the VA severity on EST in patients with CPVT.
Funding Acknowledgement
Type of funding source: Public grant(s) – EU funding. Main funding source(s): E-Rare Joint Transnational Call for Proposals 2015 “Improving Diagnosis and Treatment of Catecholaminergic Polymorphic Ventricular Tachycardia: Integrating Clinical and Basic Science”
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Affiliation(s)
- P Peltenburg
- Amsterdam UMC - Location Academic Medical Center, Amsterdam, Netherlands (The)
| | - K.V.V Lieve
- Amsterdam UMC - Location Academic Medical Center, Amsterdam, Netherlands (The)
| | - C Van Der Werf
- Amsterdam UMC - Location Academic Medical Center, Amsterdam, Netherlands (The)
| | - A.A.M Wilde
- Amsterdam UMC - Location Academic Medical Center, Amsterdam, Netherlands (The)
| | | | - J Till
- Royal Brompton Hospital, London, United Kingdom
| | - M.J Ackerman
- Mayo Clinic, Rochester, United States of America
| | - V Probst
- Institut du Thorax, Nantes, France
| | - K Haugaa
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - H Swan
- Helsinki University Hospital, Helsinki, Finland
| | - J.A.E Kammeraad
- Erasmus University Medical Centre, Rotterdam, Netherlands (The)
| | - M Horie
- Shiga University of Medical Science, Otsu, Japan
| | - S Sanatani
- BC Centre for Improved Cardiovascular Health, Vancouver, Canada
| | - P Schwartz
- Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - A Leenhardt
- Bichat Hospital, University Paris-Diderot, INSERM-UMR1148, FACT French Alliance for Cardiovascular T, Paris, France
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24
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Imamura T, Makiyama T, Huang H, Aizawa T, Gao J, Kashiwa A, Wuriyanghai Y, Yamamoto Y, Kohjitani Y, Kato K, Ohno S, Sumitomo N, Horie M. Clinical aspects of pediatric Brugada syndrome. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Introduction
Brugada syndrome (BrS) is an inherited arrhythmia characterized by a coved-type ST elevation and sudden death, especially in middle-aged males and more common in Asia. Mutations in SCN5A are detected in 15–20% and reported to be associated with poor prognosis. Among children, BrS is rare and the risk factors in pediatric BrS are unknown, especially in Asian population.
Purpose
The purpose of this study is to elucidate the risk factors for fatal arrhythmic events in Japanese pediatric patients with BrS.
Methods
We enrolled 52 Japanese children with BrS younger than 20 years, and performed genetic analysis and collected the clinical information.
Results
The mean age of initial symptoms was 10.7±5.5 years, and the mean follow-up period was 3.9±5.5 years. Ninety percent of patients were probands. No subjective symptom was confirmed in 28 of the patients, but aborted cardiac arrest (ACA) in 4, ventricular tachycardia in 4, ventricular fibrillation in 1, and syncope in 11. We identified mutations in SCN5A in 63%. There was no significant gender difference in ≤10 years, but a significant male predominance appeared in >10 years. And no gender difference was confirmed in the incidence of severe cardiac events in ≤10 years.
Conclusion
No gender difference was confirmed in ≤10 years in this study about Asian children. And being girls did not reduce the risk in ≤10 years. The frequency of SCN5A mutations was higher than adults, but decreased from childhood (68%) to adolescence (59%). In BrS, genetical and environmental factors may be more effective in childhood and adulthood, respectively.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Imamura
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Makiyama
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - H Huang
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Aizawa
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - J Gao
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - A Kashiwa
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Y Wuriyanghai
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Y Yamamoto
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Y Kohjitani
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - K Kato
- Shiga University of Medical Science, Department of Cardiology, Otsu, Japan
| | - S Ohno
- National Cerebral & Cardiovascular Center, Suita, Japan
| | - N Sumitomo
- Saitama Medical University International Medical Center, Department of Pediatric Cardiology, Hidaka, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Shiga, Japan
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Sonoda K, Ohno S, Horie M. Long-read sequence confirmed a large deletion of MYH6 and MYH7 in a family with atrial septal defect. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Genome structural variants (SVs) have larger effect on human genome functions than single nucleotide variants (SNVs). Although short-read sequencing (SRS) is current major next generation sequencing method and has given us a great benefit to elucidate the genetic background of inherited diseases, it does not detect SVs accurately. Long-read sequencing (LRS) produces tens to thousands of kilobases reads and detects the breakpoints of complex SVs. This study aimed to confirm a large deletion, which was suspected by SRS, using LRS by Oxford Nanopore technology (ONT).
Methods
Genomic libraries for SRS was prepared with HaloPlex. Targeted SRS was performed for 58 genes with MiSeq. Genomic libraries for LRS were prepared using the Ligation sequencing 1D kit SQK-LSK109 (ONT). Whole genome LRS was performed with GridION X5 and R9.4 flow cells (ONT).
Results
The patient was a five-month-old boy with atrial septal defect (ASD) and atrial tachycardia. Though SRS failed to identify any causative SNVs, the results with SureCall software (Agilent) suspected a deletion between exon 3 to exon 26 in MYH6 encoding α heavy chains of cardiac myosin. The variants in MYH6 are known to be associated with ASD. Because a deletion between MYH6 exon 26 and MYH7 exon 27 was reported as esv2748480 on the Database of Genomic Variants, we performed long-range PCR from MYH6 intron26 to MYH7 exon26 and found an abnormal 1.5K bases PCR product only in the case. Due to high homology of MYH6 and MYH7, Sanger sequencing failed to detect the break point.
In LRS, 3 flow cells generated 3.8M base-called reads containing 42G bases with N50 of 13K bases. We used NGMLR, which is a long-read mapper, to align the reads to the human reference genome (hg38). SVs were called by Sniffles detecting all types of SVs. The deletion was found to range from chr14: 23390037 to 23419824 (see figure) and did not contain other SVs. There was no pathogenic SV on ACTC1, GATA4, TBX20 and TLL1 which are genes related to ASD on Genetic Testing Registry.
His mother had also ASD and harbored the same deletion.
Conclusions
This is the first report to identify a large deletion between MYH6 and MYH7 in the family with ASD. The combination of SRS and LRS is useful to detect SVs in patients with suspected inherited diseases but carried no causative SNVs.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Sonoda
- National Cerebral and Cardiovascular Center, Department of Bioscience and Genetics, Osaka, Japan
| | - S Ohno
- National Cerebral and Cardiovascular Center, Department of Bioscience and Genetics, Osaka, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Otsu, Japan
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Kashiwa A, Aiba T, Makimoto H, Yagihara N, Ohno S, Makiyama T, Hayashi K, Itoh H, Sumitomo N, Yoshinaga M, Morita H, Makita N, Kusano K, Horie M, Shimizu W. Systematic Evaluation of KCNQ1 variant using ACMG/AMP Guidelines and Risk Stratification in Long QT Syndrome Type 1. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Mutation/variant-site specific risk stratification in long-QT syndrome type 1 (LQT1) has been well investigated, but it is still challenging to adopt current enormous genomic information to clinical aspects caused by each mutation/variant. We assessed a novel variant-specific risk stratification in LQT1 patients.
Methods
We classified a pathogenicity of 142 KCNQ1 variants among 927 LQT1 patients (536 probands and 391 family members) based on the American College of Medical Genetics and Genomics (ACMG) and Association for Molecular Pathology (AMP) guidelines and evaluated whether the ACMG/AMP-based classification was associated with arrhythmic risk in LQT1 patients.
Results
Among 142 KCNQ1 variants, 60 (42.3%), 58 (40.8%), and 24 (16.9%) variants were classified into pathogenic (P), likely pathogenic (LP), and variant of unknown significance (VUS), respectively. The ACMG/AMP guideline-based classification was significantly associated with syncopal events (particularly those during exercise) and LQT risk score (Schwartz score) in overall population. On the other hand, arrhythmic risk was completely different between probands and families even in the same variants. The baseline QTc interval and variant location could stratify the risk in family members but not in probands, however, the ACMG/AMP-based KCNQ1 variant classification stratified the risk in LQT1 probands as well as family members. Multivariate analysis showed that proband (HR=2.52; 95% CI: 1.93–3.30; p<0.0001), longer QTc interval (≥500ms) (HR=1.41; 95% CI: 1.11–1.79; p<0.0001), variants at membrane spanning (MS) (vs. those at N/C terminus) (HR=1.40; 95% CI: 1.07–1.85; p=0.02), C-loop (vs. N/C terminus) (HR=1.58; 95% CI: 1.11–2.24; p=0.01), and P variants [(vs. LP) (HR=1.71; 95% CI: 1.33–2.23; p<0.0001), (vs. VUS) (HR=1.96; 95% CI: 1.19–3.46; p=0.007)] were significantly associated with syncopal events. A clinical score (0–4) based on the proband, QTc (≥500ms), variant location (MS or C-loop) and P variant by the ACMG/AMP guidelines allowed identification of patients more likely to have arrhythmic events (Figure A and B).
Conclusion
Comprehensive evaluation of clinical findings and pathogenicity of KCNQ1 variants based on the ACMG/AMP-based evaluation may stratify arrhythmic risk of congenital long-QT syndrome type 1.
Figure 1
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): Health Science Research Grant from the Ministry of Health,Labor and Welfare of Japan for Clinical Research on Measures for Intractable Diseases (H24-033, H26-040, H27-032) and a research grant from the Japan Agency for Medical Research and Development (AMED) (15km0305015h0101, 16ek0210073h0001)
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Affiliation(s)
- A Kashiwa
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - H Makimoto
- National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - S Ohno
- National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - K Hayashi
- Kanazawa University, Kanazawa, Japan
| | - H Itoh
- Shiga University of Medical Science, Otsu, Japan
| | - N Sumitomo
- Saitama Medical University International Medical Center, Hidaka, Japan
| | - M Yoshinaga
- National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - H Morita
- Okayama University, Okayama, Japan
| | - N Makita
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - M Horie
- Shiga University of Medical Science, Otsu, Japan
| | - W Shimizu
- Nippon Medical School Teaching Hospital, Tokyo, Japan
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Kato K, Ohno S, Sonoda K, Makiyama T, Ozawa T, Horie M. Splice site mutation of LMNA causes severe dilated cardiomyopathy via strong dominant reduction of total lamin expression. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
LMNA is a known causative gene of dilated cardiomyopathy (DCM) and familial cardiac conduction disturbance (CCD). Genetic variants affecting the pre-mRNA splicing process often lead to premature stop codons and result in nonsense-mediated mRNA decay (NMD), followed by degradation of mutated alleles. The misssense variant LMNA c. 936G>C was previously reported in a French family affected by muscular dystrophy, CCD, and DCM, but no detailed analysis has been performed. We so far identified the same variant in two Japanese families affected by CCD and DCM. In this study, we investigated the molecular consequences of the variant located at the last codon of LMNA exon5 to demonstrate its pathogenicity.
Methods
Genomic DNA and total RNA were isolated from patients' peripheral blood lymphocytes or cardiac tissue. LMNA-coding exons were screened by direct sequencing. Complementary DNAs (cDNAs) were generated by reverse transcription PCR from RNA. Quantitative PCR (qPCR) was performed to quantify the LMNA cDNA amount by using specific primers for lamins A and C. The protein expressions of both isoforms were analyzed by western blotting.
Results
We detected the heterozygous LMNA c.936 G>C (p. Q312H) variant at the end of exon 5 by genomic DNA sequencing in two unrelated Japanese families (figure. pedigree) affected by DCM and CCD. In a genomic database survey, we did not find the variant in either gnomAD, TogoVar, or the Human Genetic Variation Database. The two commonly used splice site predictor tools, NetGene2 and FSPLICE, estimated that this site was a splice donor site. Sequencing of cDNA demonstrated that the mutated allele was absent. By qPCR assay, we confirmed a 90% reduction in LMNA cDNA. Western blot analysis revealed that lamin A and C expression was reduced far more than 50% (figure. western blot).
Conclusions
We report a LMNA missense mutation found in two families, which disrupts a normal splicing site, leads to NMD, and resulted in severe cardiac laminopathy. The drastic reductions of lamin expression at the cDNA and protein levels suggested that other co-existing mechanisms may also have suppressed the expression of the healthy wild type allele.
Pedigree and western blot assay
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): Japan Society for the Promotion of Science KAKENHI
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Affiliation(s)
- K Kato
- Shiga University of Medical Science, Cardiovascular and Respiratory Medicine, Otsu, Japan
| | - S Ohno
- National Cerebral and Cardiovascular Center, Department of Bioscience and Genetics, Osaka, Japan
| | - K Sonoda
- National Cerebral and Cardiovascular Center, Department of Bioscience and Genetics, Osaka, Japan
| | | | - T Ozawa
- Shiga University of Medical Science, Cardiovascular and Respiratory Medicine, Otsu, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Otsu, Japan
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28
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Sugiura Y, Obika H, Horie M, Niitsu K, Makita Y. Aesthetic Silver-Doped Octacalcium Phosphate Powders Exhibiting Both Contact Antibacterial Ability and Low Cytotoxicity. ACS Omega 2020; 5:24434-24444. [PMID: 33015459 PMCID: PMC7528307 DOI: 10.1021/acsomega.0c02868] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/19/2020] [Indexed: 05/11/2023]
Abstract
Since the introduction of biomaterials, infection has been a serious problem in clinical operations. Although several studies have introduced hybrid materials of calcium phosphate and Ag0 nanoparticles (NPs) that exhibit antibacterial activity, released Ag+ ions and Ag0 NPs are highly cytotoxic and the materials require complex fabrication techniques such as laser irradiation. In this study, we introduce a simple one-pot synthesis method based on crystal-engineering techniques to prepare Ag+-substituted octacalcium phosphate (OCP-Ag) powder that simultaneously exhibits antibacterial activity, little change in color, and low cytotoxicity, thereby overcoming the shortcomings of calcium phosphate as a biomaterial. We used AgNO3-containing (NH4)2HPO4 aqueous solutions as reaction solutions in which Ag+ forms soluble complex [Ag(NH3)2]+ ions that are stable at Ag+ concentrations less than ∼30 mmol/L. Hydrolysis of soluble calcium phosphate in this solution led to pure OCP-Ag when the Ag+ concentration was less than ∼30 mmol/L. Crystallographic analysis showed that Ag+ substituted at the P5 PO4-conjugated sites and was uniformly distributed. When the concentration of Ag+ in the reaction solution was varied, the Ag+ content of the OCP-Ag could be controlled. The obtained OCP-Ag exhibited little color change or Ag+ release when immersed in various media; however, it exhibited contact antibacterial ability toward resident oral bacteria. The prepared OCP-Ag showed no substantial cytotoxicity toward undifferentiated and differentiated MC3T3-E1 cells in assays. Notably, when the Ag+ content in OCP-Ag was optimized (Ag: ∼1 at %), it simultaneously exhibited contact antibacterial ability, little color change, and low cytotoxicity.
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Affiliation(s)
- Yuki Sugiura
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-0895, Kagawa, Japan
| | - Hideki Obika
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-0895, Kagawa, Japan
| | - Masanori Horie
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-0895, Kagawa, Japan
| | - Kodai Niitsu
- Department
of Material Science and Engineering, Kyoto
University, Yoshida-honcho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yoji Makita
- Health
and Medical Research Institute, National
Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-cho, Takamatsu 761-0895, Kagawa, Japan
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29
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Abstract
Awa-bancha is a post-fermented tea produced in Naka and Kamikatsu, Tokushima, Japan. We investigated the lactic acid bacteria in each stage of production of Awa-bancha and evaluated the relationships with the components. Lactic acid bacteria were isolated from tea leaves cultured with de Man, Rogosa, and Sharpe (MRS) agar plates, and the species were identified by homology of the 16 S rRNA gene and multiplex polymerase chain reaction (PCR) of the recA gene to distinguish the Lactobacillus plantarum group. As a result, a variety of species were isolated from the raw tea leaves, and Lactobacillus pentosus was isolated most frequently after anaerobic fermentation. Regarding the tea leaf components, organic acids, such as lactic acid, increased, free amino acids decreased, and catechins changed owing to anaerobic fermentation. Our results suggest that the microbial flora mainly composed of L. pentosus is important in the anaerobic fermentation process for flavor formation of Awa-bancha.
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Affiliation(s)
- Hiroki Nishioka
- Food and Biotechnology Division, Tokushima Prefectural Industrial Technology Center , Tokushima, Japan.,United Graduate School of Agricultural Science, Gifu University , Gifu, Japan.,Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu, Japan
| | - Tomofumi Mizuno
- The Graduate School of Natural Science and Technology, Gifu University , Gifu, Japan
| | - Hitoshi Iwahashi
- Faculty of Applied Biological Sciences, Gifu University , Gifu, Japan
| | - Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu, Japan
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30
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Watanabe T, Guan Z, Horie M, Joe B, Juan M, Buhari H, Hwang D, Kolls J, Liu M, Keshavjee S, Juvet S, Martinu T. IL-17 Receptor on Donor Cells Regulates Acute and Chronic Lung Allograft Rejection Potentiated by Repeated Endotoxin Inhalations. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.796] [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: 11/29/2022] Open
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31
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Chen CY, Liu YB, Lu TP, Yu QY, Lin LY, Yu CC, Makita N, Ishikawa T, Lai LP, Hwang JJ, Yeh SF, Lin JL, Juang JM, Horie M, Antzelevitch C. 299 The prevalence and role of SCN10A variants in Han Chinese patients with Brugada syndrome: the SADS-TW BrS registry. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehz872.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
On Behalf
SADS-TW BrS registry
Background
Brugada syndrome (BrS) is an inheritable arrhythmic disease responsible for sudden cardiac death. Information on the prevalence and role of SCN10A variants in BrS is limited and equivocal.
Purpose
We aimed to investigate the prevalence and role of SCN10A variants in BrS in Han Chinese.
Methods
From 2000 to 2017, we prospectively and consecutively enrolled 176 unrelated BrS patients from the Han Chinese population in Taiwan (the SADS-TW BrS registry). Thirty-four BrS-related genes were screened by next-generation sequencing, using Taiwan Biobank as the population reference. The pathogenicity was evaluated by literature review and in silico analyses, including the SKAT-O algorithm.
Results
The SKAT-O algorithm showed that rare variants of SCN10A, but not common variants, were significantly different between BrS patients and healthy controls in the additive and dominant models (p-value <0.001), suggesting that rare SCN10A variants may play a role in BrS. Six likely pathogenic SCN10A variants were found in 6 patients and were compared to 25 pathogenic or likely pathogenic SCN5A variants found in 29 patients. The patients with likely pathogenic SCN10A variants tended to exhibit sudden death in older age and have a shorter QRS interval than those carrying pathogenic or likely pathogenic SCN5A variants or no variants in either gene (p = 0.06, 0.07, respectively). Collectively, the prevalence of likely pathogenic SCN10A variants was 3.4% in Han Chinese patients with BrS in Taiwan.
Conclusions
SCN10A likely pathogenic variants were present in 3.4% of Han Chinese BrS patients. Rare SCN10A variants may play a role in BrS, and may have impact on clinical and electrocardiographic manifestations.
Table 1. Patient Nucleotide Amino acid TWB gnomAD_EA REVEL CADD PHRED SIFT Polyphen-2 GERP++ 1 c.5789A > T p.D1930V 0.001318 0.0008700 0.479 24.5 Damaging Possibly damaging 4.22 2 c.2341G > A p.G781R 0 0.00005301 0.866 33 Damaging Probably damaging 4.83 3 c.5587C > T p.R1863W 0.000502 0 0.832 27.8 Damaging Probably damaging 1.97 4 c.2161C > T p.P721S 0.000989 0.0009016 0.933 28.5 Damaging Probably damaging 4.19 5 c.3749G > A p.R1250Q 0 0 0.907 31 Damaging Probably damaging 4.23 6 c.1825A > T p.R609W 0.000659 0.0001591 0.811 32 Damaging Probably damaging 4.28 Clinical and predicted functional characteristics of 6 likely pathogenic SCN10A variants. EA = East Asian; GERP = Genomic Evolutionary Rate Profiling; TWB = Taiwan Biobank. Transcript: NM_006514.3.
Abstract 299 Figure. Location of the SCN10A variants
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Affiliation(s)
- C-Y Chen
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - Y-B Liu
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - T-P Lu
- National Taiwan University, Department of Public Health, Taipei, Taiwan
| | - Q-Y Yu
- National Taiwan University, Department of Public Health, Taipei, Taiwan
| | - L-Y Lin
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - C-C Yu
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - N Makita
- Nagasaki University, Department of Molecular Physiology, Nagasaki, Japan
| | - T Ishikawa
- Nagasaki University, Department of Molecular Physiology, Nagasaki, Japan
| | - L-P Lai
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - J-J Hwang
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - S-F Yeh
- National Taiwan University Hospital, Department of Environmental and Occupational Medicine, Taipei, Taiwan
| | - J-L Lin
- Taipei Medical University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - J-M Juang
- National Taiwan University Hospital, Department of Internal Medicine, Taipei, Taiwan
| | - M Horie
- Shiga University of Medical Science, Department of Cardiovascular Medicine, Shiga, Japan
| | - C Antzelevitch
- Lankenau Institute for Medical Research, Philadelphia, United States of America
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Moriyama A, Hasegawa T, Nagaya C, Hamada K, Himaki T, Murakami M, Horie M, Takahashi J, Iwahashi H, Moritomi H. Assessment of harmfulness and biological effect of carbon fiber dust generated during new carbon fiber recycling method. J Hazard Mater 2019; 378:120777. [PMID: 31228707 DOI: 10.1016/j.jhazmat.2019.120777] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 05/10/2019] [Accepted: 06/13/2019] [Indexed: 06/09/2023]
Abstract
Concern over the effects of nanomaterials on human health has risen due to the dramatic advances in the development of various technologies based on nanomaterials. Gifu Prefecture and Gifu University are developing technologies for recycling used carbon fiber because the waste disposal process is highly cost and energy intensive. However, generation of carbon fiber dust during the recycling process is a serious issue, especially in the occupational environment. Recycling requires carbonization by partial firing treatment at 500℃ followed by firing treatment at 440℃: these processes produce dust as a by-product. It is important to study the influence of carbon fibers on human health at a molecular level. In this study, three types of carbon fibers - before recycling, after carbonization, and after firing were evaluated for their toxic effects on mice. During the breeding period, no loss in body weight was confirmed. Further, by staining the lung tissue sections, it was found that pulmonary fibrosis did not occur. We found that these carbon fibers might not possess severe toxicity. However, we also found that the toxicity varies according to firing treatment. Furthermore, we found that firing treatment reduces the potential hazard to human health.
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Affiliation(s)
- Akihiro Moriyama
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan.
| | - Takema Hasegawa
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
| | - Chisato Nagaya
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
| | - Kazuhiro Hamada
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
| | - Takehiro Himaki
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
| | - Mami Murakami
- Joint Department of Veterinary Medicine, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
| | - Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, 761-0395, Japan
| | - Junko Takahashi
- Molecular Composite Medicine Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566, Japan
| | - Hitoshi Iwahashi
- Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
| | - Hiroshi Moritomi
- Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, Gifu, 501-1193, Japan
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Ohno S, Yoshinaga M, Ozawa J, Fukuyama M, Seiichi S, Kashiwa A, Yasuda K, Kaneko S, Nakau K, Inukai S, Sakazaki H, Makiyama T, Aiba T, Suzuki H, Horie M. P2865Mutation specific clinical characteristics in long QT syndrome type 8; severe phenotype in Timothy syndrome patients. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.1174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Long QT syndrome type 8 (LQT8) caused by mutations in CACNA1C has been classified as a very rare and severe type of long QT syndrome accompanied with Timothy syndrome (TS) with extra-cardiac phenotype. Recently, various mutations in CACNA1C have been identified in non-TS patients. However, mutation specific severity in LQT8 has not been elucidated yet, especially for non-TS patients.
Purpose
We aimed to clarify the clinical characteristics of LQT8 patients.
Methods
The study consists of 26 LQT8 patients (21 probands and 5 family members). We evaluated their phenotype.
Results
Table summarizes the clinical characteristics of LQT8 patients. TS patients diagnosed in younger age than those of non-TS. Four TS and one non-TS patients were diagnosed at the age of 0, though the non-TS patient was a son of a patient and asymptomatic. Nine patients suffered symptoms including 7 with cardiac arrest. We identified three TS mutations; classical p.G406R in two and p.G402S in two, and a new TS mutation, p.412M in one. Four of TS patients were symptomatic and two died suddenly at the age of 4 and 5. In contrast, no one died in non-TS patients. Five non-TS patients suffered symptoms in the age of 4,9,15,54 and 64, and the mutations were p.S643F, p.R858H (2 patients), p.K1518E and p.K1591T.
Characteristics of TS and non-TS patient TS Non-TS P N (male) 5 (2) 21 (9) Age (range) 0 (0–7) 12 (0–64) 0.004 Symptom Syncope 4 5 0.034 CPA 3 4 0.101 ECG characteristics QT interval 603±40 507±14 0.011 T wave alternans 5 2 <0.001 AV Block 4 1 0.002 Therapy (4 unknown) Beta-blocker 4 7 0.311 Mexiletine 3 1 0.024 ICD implantation 2 2 0.21
Conclusions
Although TS patients showed severe phenotype, most of the non-TS patients were asymptomatic. The phenotype in LQT8 are diversely different depend on the mutations, especially between patients with TS and non-TS.
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Affiliation(s)
- S Ohno
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - M Yoshinaga
- National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - J Ozawa
- Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - M Fukuyama
- Shiga University of Medical Science, Otsu, Japan
| | - S Seiichi
- Okinawa Children's Medical Center, Haibaru, Japan
| | - A Kashiwa
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - K Yasuda
- Aichi Children's Health and Medical Center, Daifu, Japan
| | - S Kaneko
- Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - K Nakau
- Asahikawa Medical University, Asahikawa, Japan
| | - S Inukai
- Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - H Sakazaki
- Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - T Makiyama
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - H Suzuki
- Uonuma Kikan Hospital, Minamiuonuma, Japan
| | - M Horie
- Shiga University of Medical Science, Otsu, Japan
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Takayama K, Ding WG, Matsuura H, Horie M, Ohno S. P3827Low dose of quinidine is effective to normalize the slow inactivation in mutant Kv4.3 channel identified in an early repolarization syndrome patient. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Early repolarization syndrome (ERS) is characterized by J-point elevation in the ECG and ventricular fibrillation (VF). Several mutations in genes encoding cardiac ion channels have been reported as the causes for ERS. For the treatment of ERS, clinical studies have shown that quinidine is effective for the suppression of electrical storm. However, the mechanism or the optimal concentration for quinidine to suppress the electrical storm has not been elucidated yet.
Purpose
The aim of the present study is to clarify pharmacological effect of quinidine on mutant Kv4.3 channel by electrophysiological analysis and to establish theoretically effective treatment for ERS.
Methods
A KCND3 mutation, p.G306A, identified heterozygously in a 12-year-old boy was examined by whole-cell patch-clamp methods using CHO cells. We performed functional analysis of the Kv4.3 channels encoded by KCND3 of wild-type (WT), heterozygous (WT/G306A), or homozygous (G306A) mutants. Pharmacological normalizing effects of quinidine to the WT and mutant channels were investigated by loading test in various concentration. The sensitivity of quinidine was evaluated in terms of the concentration of the clinical course and the loading test.
Results
The patient suffered VF while sleeping or under sedation. Significant J-point elevations in multiple leads were recorded and he was diagnosed as ERS. Quinidine administration in the serum concentration of 1.2 to 3.1 μM was effective to stop his VF storm. Mutant Kv4.3 currents showed significantly slow inactivation time course (Fig 1), which meant that the mutation caused the gain-of-function channel. Quinidine loading to the mutant Kv4.3 normalized the inactivation time course in concentration-dependent manner (Fig 2, 3). In the loading concentration of 1 μM, the peak currents were not changed regardless of the voltage (Fig 4). The optimal serum concentration of quinidine in clinical use as multi-ion-channels blocker is 6 to 15 μM and the concentration was higher than that of the patient to stop the VF storm. The electrophysiological analysis showed that the low dose loading of quinidine was effective to prevent the gain-of function change of mutant Kv4.3 channels.
Electrophysiological analysis
Conclusions
We showed the pharmacological mechanism of quinidine against the mutant Kv4.3 channels identified in an ERS patient. Even the low concentration of quinidine was effective to normalize the slow inactivation, gain-of-function, in mutant Kv4.3 channels. Our data would be helpful to confirm the optimal concentration of quinidine for ERS patients to avoid adverse effect.
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Affiliation(s)
- K Takayama
- Shiga University of Medical Science, Department of Cardiovascular Medicine, Otsu, Japan
| | - W G Ding
- Shiga University of Medical Science, Department of Physiology, Otsu, Japan
| | - H Matsuura
- Shiga University of Medical Science, Department of Physiology, Otsu, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Otsu, Japan
| | - S Ohno
- National Cerebral and Cardiovascular Center, Department of Bioscience and Genetics, Osaka, Japan
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Gao J, Makiyama T, Ohno S, Yamamoto Y, Wuriyanghai Y, Kohjitani H, Kashiwa A, Huang H, Katou K, Horie M, Kimura T. P5025Structural insights into catecholaminergic polymorphic ventricular tachycardia-associated RyR2 mutant channels using a three-dimensional in silico model. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The cardiac ryanodine receptors (RyR2) are large tetrameric calcium-permeant ion channels found in cardiac muscle sarcoplasmic reticulum, which play an important role in the control of intracellular Ca2+ release and cardiac contraction. Mutations in the RYR2 gene are associated with lethal arrhythmia diseases including catecholaminergic polymorphic ventricular tachycardia (CPVT) resulting from increased diastolic Ca2+ leak from mutant channels. RyR2 is a huge protein that each subunit of tetramer is comprised of 4967 amino acids, which hampers the detailed in vitro analysis of RyR2 mutant channels.
Purpose
We aimed to analyze the structural features of RyR2 mutant channels identified in our cohort with inherited arrhythmias using RyR2 three-dimensional (3D) in silico model to reveal the arrhythmogenic mechanisms.
Methods
A targeted next-generation sequencing panel for inherited arrhythmias was employed for genetic diagnosis of the patients. Then, we mapped the identified mutations on RyR2 3D structural model developed by cryo-EM images (PDB: 5go9, 5goa, Peng Science 2016) and investigated the relationship between the location of the mutations and specific functional sites.
Results
As a result of genetic analysis, we identified 93 RYR2 mutations from 112 probands with CPVT (n=93) or long-QT syndrome (LQTS) (n=19).64 of 93 (69%) RYR2 mutations are located in three “hot-spot” area (N-terminal (residues 77–466), central (2246–2534), and channel (3778–4959) hotspot. RyR2 3D in silico modeling revealed that the mutations are regionally distributed mainly in three parts: N-terminal, periphery, and channel part (Figure A). In N-terminal part (1–642 amino acid), 9 of 13 mutations alter the charges of the amino acids (Figure B). Especially, R169L, R169Q, and G172E are close to the interface between two neighboring subunits (∼20Å). These mutations which change the amino acid charge may cause a complete disruption of the ionic pair network and result in largest structural changes, which facilitates RyR2 channel opening. In periphery part (643–3528aa), 22 of 33 mutations are close to the two predicted binding sites of FKBP12.6, a stabilizer of RyR2 (∼5–40Å, Figure C). The mutations are supposed to disturb the binding affinity to the FKBP12.6 resulting in RyR2 channel instability. In channel part (3613–4968aa), 16 of 40 mutations are located near two interface. (FigureD) 12 mutations are close to the Ca2+ sensor and the other 4 mutations are adjacent to the pore-forming segment. Especially, V4821I is just located on this segment and strongly expected to impair the channel function. Above all, RyR2 3D in silico modeling revealed that 63 of all 93 (68%) identified mutations are supposed to be pathogenic.
Location of RYR2 mutations in 3D model
Conclusion
3D structural model of RyR2 is useful for the investigation of the pathogenic mechanisms of CPVT-related mutations. Further studies are needed to elucidate the relationship between the location of the mutations and clinical phenotypes.
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Affiliation(s)
- J Gao
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - T Makiyama
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - S Ohno
- National Cerebral and Cardiovascular Center Hospital, Department of Bioscience and Genetics, Osaka, Japan
| | - Y Yamamoto
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - Y Wuriyanghai
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - H Kohjitani
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - A Kashiwa
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - H Huang
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - K Katou
- Shiga University of Medical Science, Department of Cardiovascular and Respiratory Medicine, Otsu, Japan
| | - M Horie
- Shiga University of Medical Science, Center for Epidemiologic Research in Asia, Otsu, Japan
| | - T Kimura
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
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Horie M, Tabei Y, Sugino S, Eguchi K, Chiba R, Tajika M. Comparison of proinflammatory potential of needle-shaped materials: aragonite and potassium titanate whisker. Arch Toxicol 2019; 93:2797-2810. [PMID: 31493027 DOI: 10.1007/s00204-019-02556-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 07/05/2019] [Accepted: 09/02/2019] [Indexed: 12/28/2022]
Abstract
Among the crystal forms of calcium carbonate, aragonite has needle-like shape. Although materials with needle-shaped crystals are associated with pulmonary toxicity, the toxic activity of aragonite is unclear. Therefore, proinflammatory potential of aragonite, neutralized aragonite and potassium titanate whisker was evaluated. The cellular effects of aragonite were weaker than those of potassium titanate whisker. Aragonite treatment induced the expression of chemokines in A549 cells and macrophages. Although aragonite exhibited proinflammatory effects in vitro, pulmonary inflammation was not observed in vivo after intratracheal administration of aragonite in mice. We did not observe the induction of inflammatory cytokine secretion or tissue lesion in the lungs of mice after administration of aragonite. Potassium titanate whisker treatment induced chemokine secretion in vitro. An increase in the number of neutrophils was observed in the mice lung tissue after administration of potassium titanate whisker. Aragonite and neutralized aragonite both induced an increase in the levels of intracellular calcium, but the levels were significantly higher in cells treated with aragonite than in cells treated with neutralized aragonite. These results suggested that intracellular calcium release mediates the cellular effects of aragonite. The toxicity of aragonite based on its needle-like structure was also not observed.
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Affiliation(s)
- Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-Cho, Takamatsu, Kagawa, Japan.
| | - Yosuke Tabei
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-Cho, Takamatsu, Kagawa, Japan
| | - Sakiko Sugino
- Shiraishi Central Laboratories Co., Ltd., 4-78 Motohamacho, Amagasaki, Hyogo, Japan
| | - Kenichiro Eguchi
- Shiraishi Central Laboratories Co., Ltd., 4-78 Motohamacho, Amagasaki, Hyogo, Japan
| | - Ryo Chiba
- Shiraishi Central Laboratories Co., Ltd., 4-78 Motohamacho, Amagasaki, Hyogo, Japan
| | - Masahiko Tajika
- Shiraishi Central Laboratories Co., Ltd., 4-78 Motohamacho, Amagasaki, Hyogo, Japan
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Horie M, Tada A, Kanamoto N, Tamai T, Fukuda N, Sugino S, Toyotome T, Tabei Y. Evaluation of lactic acid bacteria and component change during fermentation of Ishizuchi‐kurocha. J FOOD PROCESS PRES 2019. [DOI: 10.1111/jfpp.14186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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)
- Masanori Horie
- Health Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Takamatsu Japan
| | - Atsumi Tada
- Health Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Takamatsu Japan
| | - Naoaki Kanamoto
- Food Technology Center Ehime Institute of Industrial Technology Matsuyama Japan
| | - Takahisa Tamai
- Food Technology Center Ehime Institute of Industrial Technology Matsuyama Japan
| | - Naohiro Fukuda
- Food Technology Center Ehime Institute of Industrial Technology Matsuyama Japan
| | - Sakiko Sugino
- Health Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Takamatsu Japan
| | - Takahito Toyotome
- Department of Veterinary Medicine Obihiro University of Agriculture and Veterinary Medicine Obihiro Japan
| | - Yosuke Tabei
- Health Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Takamatsu Japan
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38
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Moriyama A, Takahashi U, Mizuno Y, Takahashi J, Horie M, Iwahashi H. The Truth of Toxicity Caused by Yttrium Oxide Nanoparticles to Yeast Cells. J Nanosci Nanotechnol 2019; 19:5418-5425. [PMID: 30961691 DOI: 10.1166/jnn.2019.16544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Yttrium oxide (Y₂O₃) nanoparticles have widespread applications; however, toxicity due to these nanoparticles has also been reported. In this study, we evaluated the in vitro toxicity of Y₂O₃ nanoparticles according to the technical specifications published by the International Standard Organization (ISO/TS 19337:2016). We used Saccharomyces cerevisiae as a model microorganism represented the environment. We carried out catch ball analysis of yttrium oxide and yttrium ion toxicities. The result showed that Y₂O₃ nanoparticles (20 mg/5 ml) and YCl₃ (5 mg/5 ml) treatment caused oxidative stress in yeast cells. Based on transcriptome analysis, fluorescent spectroscopy, and solubility analysis of Y₂O₃ nanoparticles, we conclude that the toxicity is due to yttrium ions derived from the nanoparticles. The ions induce oxidative stress and cause protein denaturation, which in turn induces proteasome formation to eliminate denatured proteins. Yttrium nanoparticles induce oxidative stress, which has associated with heavy metal ions. Thus, the use of yttrium nanoparticles or yttrium ions must be controlled like heavy metals.
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Affiliation(s)
- Akihiro Moriyama
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
| | - Ukyo Takahashi
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
| | - Youta Mizuno
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
| | - Junko Takahashi
- Molecular Composite Medicine Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Masanori Horie
- Molecular Composite Medicine Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Hitoshi Iwahashi
- Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
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Horie M, Tabei Y, Sugino S, Fukui H, Nishioka A, Hagiwara Y, Sato K, Yoneda T, Tada A, Koyama T. Comparison of the effects of multiwall carbon nanotubes on the epithelial cells and macrophages. Nanotoxicology 2019; 13:861-878. [PMID: 31349755 DOI: 10.1080/17435390.2019.1592258] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Effects of two kinds of multiwall carbon nanotubes (MWCNTs) on cells were examined. The effects of MWNT-7, which has been reported to be carcinogenic, and MWCNT-B, whose toxicity is unclear, were examined in both epithelial cells and macrophages. Human lung carcinoma A549 cells were used as representative epithelial cells and differentiated human monocyte THP-1 cells, as well as rat pulmonary macrophages NR8383, were employed to examine possible harmful effects of the MWCNTs. The MWCNTs induced the production of chemokines such as interleukin-8 (IL-8). MWCNTs were found to more strongly affect macrophages than epithelial cells. In addition, the toxicity was more pronounced in the MWNT-7 exposed cells than in those exposed to MWCNT-B. Cytochalasin D and amiloride treatment of differentiated THP-1 cells reduced cell-associated MWCNTs and IL-8 induction. To confirm these cellular influences in vivo, intratracheal administration of each type of MWCNT was performed by pharyngeal aspiration in the mouse lung. Analysis of bronchoalveolar lavage fluid (BALF) showed increase of inflammatory monocyte in MWNT-7 exposed animals at 1week after. In addition, neutrophils in the BALF were also significantly increased MWNT-7 exposed animals at 1 week and 1 month after. Aspiration of MWNT-7 caused formation of granulomas in the lung. Formation of the granulomas was not observed in the case of MWCNT-B. These results suggest that cellular uptake of the MWCNTs by phagocytosis and chemokine induction is important aspects of their toxicity.
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Affiliation(s)
- Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
| | - Yosuke Tabei
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
| | - Sakiko Sugino
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
| | - Hiroko Fukui
- Safety Evaluation Center , Midori-ku , Chiba , Japan
| | | | - Yuji Hagiwara
- Safety Evaluation Center , Midori-ku , Chiba , Japan
| | - Kei Sato
- Safety Evaluation Center , Midori-ku , Chiba , Japan
| | | | - Atsumi Tada
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
| | - Tamami Koyama
- Institute for Advanced and Core Technology , Midori-ku , Chiba , Japan
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Chen CYJ, Juang JMJ, Lin LY, Liu YB, Ho LT, Yu CC, Huang HC, Lin TT, Liao MC, Chen JJ, Hwang JJ, Chen WJ, Yeh SFS, Yang DH, Chiang FT, Lin JL, Lai LP, Horie M. Gender difference in clinical and genetic characteristics of Brugada syndrome: SADS-TW BrS registry. QJM 2019; 112:343-350. [PMID: 30690642 DOI: 10.1093/qjmed/hcz028] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Brugada syndrome (BrS) is a heritable sudden cardiac death (SCD) disease with male predominance. Information on gender difference of BrS remains scarce. AIM To investigate the gender difference of BrS in Han Chinese. DESIGN We consecutively enrolled 169 BrS patients (153 males and 16 females) from Han Chinese in Taiwan from 1998 to 2017. METHODS Clinical characteristics, electrocardiographic parameters and SCN5A mutation status were compared between genders. RESULTS The percentage of family history of SCD in females was slightly higher (31.3% vs. 15%, P = 0.15). Females exhibited longer QTc (457.8 ± 33.0 vs. 429.5 ± 42.1 ms, P < 0.01). Regarding cumulative event occurrence by age, Mantel-Cox test showed females had earlier age of onset of first cardiac events (SCD or syncope) than males (P = 0.049), which was mainly attributed to syncope (P < 0.01). Males with SCD exhibited longer QRS duration (114.2 ± 26.8 vs. 104.8 ± 15.3 ms, P = 0.02) and QTc (442.5 ± 57.4 vs. 422.9 ± 28.8 ms, P = 0.02). Males with syncope exhibited longer PR interval (181.2 ± 33.7 vs. 165.7 ± 27.1 ms, P = 0.01), whereas females with SCD or syncope had a trend towards slower heart rates (69.1 ± 9.6 vs. 82.2 ± 16.3 bpm, P = 0.10) than female with no or mild symptoms. There was no difference in the percentage of SCN5A mutation between genders. CONCLUSION Gender difference is present in BrS. Females have longer QTc and suffer from syncope earlier than males. Risk of SCD in males is associated with boarder QRS complex and longer QTc, whereas risk of syncope is associated with longer PR interval in males and slower heart rate in females.
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Affiliation(s)
- C-Y J Chen
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - J-M J Juang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - L-Y Lin
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Y-B Liu
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - L-T Ho
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - C-C Yu
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - H-C Huang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - T-T Lin
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu City, Taiwan
| | - M-C Liao
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu City, Taiwan
| | - J-J Chen
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Yunlin Branch, Yunlin, Taiwan
| | - J-J Hwang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - W-J Chen
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - S-F S Yeh
- Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - D-H Yang
- Department of Radiology, Tainan Municipal Hospital, Tainan, Taiwan
| | - F-T Chiang
- Division of Cardiology, Department of Internal Medicine, Fu Jen Catholic University Hospital, New Taipei City, Taiwan
| | - J-L Lin
- Division of Cardiology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan
| | - L-P Lai
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - M Horie
- Department of Cardiovascular Medicine, Shiga University of Medical Sciences, Shiga, Japan
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Watanabe T, Martinu T, Boonstra K, Umana J, Horie M, Guan Z, Hwang D, Liu M, Keshavjee S, Juvet S. Recipient CD103+ Classical Dendritic Cells Enhance Acute Rejection in Response to Airway Inflammation after Mouse Lung Transplantation. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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42
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Horie M, Saito T, Levy L, Salazar P, Houbois C, Keshavjee S, Paul N, Martinu T. Quantitative CT Imaging Analysis for Chronic Lung Allograft Dysfunction in Single Lung Transplant Recipients. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1037] [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: 10/27/2022] Open
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43
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Watanabe T, Martinu T, Boonstra K, Horie M, Guan Z, Joe B, Bei K, Chruscinski A, Hwang D, Liu M, Keshavjee S, Juvet S. B Cells Drive Chronic Lung Allograft Rejection after Ischemia-Reperfusion Injury in Mouse Lung Transplantation. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.191] [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: 10/27/2022] Open
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44
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Tabei Y, Fukui H, Nishioka A, Hagiwara Y, Sato K, Yoneda T, Koyama T, Horie M. Effect of iron overload from multi walled carbon nanotubes on neutrophil-like differentiated HL-60 cells. Sci Rep 2019; 9:2224. [PMID: 30778158 PMCID: PMC6379482 DOI: 10.1038/s41598-019-38598-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 07/19/2018] [Accepted: 12/28/2018] [Indexed: 01/17/2023] Open
Abstract
Multi walled carbon nanotubes (MWCNTs) are one of the most intensively explored nanomaterials because of their unique physical and chemical properties. Due to the widespread use of MWCNTs, it is important to investigate their effects on human health. The precise mechanism of MWCNT toxicity has not been fully elucidated. The present study was designed to examine the mechanisms of MWCNT toxicity toward human promyelocytic leukemia HL-60 cells. First, we found that MWCNTs decreased the viability of neutrophil-like differentiated HL-60 cells but not undifferentiated HL-60 cells. Because neutrophil-like differentiated HL-60 cells exhibit enhanced phagocytic activity, the cytotoxicity of MWCNTs is dependent on the intracellularly localized MWCNTs. Next, we revealed that the cytotoxicity of MWCNTs is correlated with the intracellular accumulation of iron that is released from the engulfed MWCNTs in an acidic lysosomal environment. The intracellular accumulation of iron was repressed by treatment with cytochalasin D, a phagocytosis inhibitor. In addition, our results indicated that iron overload enhanced the release of interleukin-8 (IL-8), a chemokine that activates neutrophils, and subsequently elevated intracellular calcium concentration ([Ca2+]i). Finally, we found that the sustained [Ca2+]i elevation resulted in the loss of mitochondrial membrane potential and the increase of caspase-3 activity, thereby inducing apoptotic cell death. These findings suggest that the iron overload caused by engulfed MWCNTs results in the increase of IL-8 production and the elevation of [Ca2+]i, thereby activating the mitochondria-mediated apoptotic pathway.
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Affiliation(s)
- Yosuke Tabei
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan.
| | - Hiroko Fukui
- Safety Evaluation Center, Showa Denko K.K., 1-1-1 Ohnodai, Midori-ku, Chiba-shi, Chiba, 267-0056, Japan
| | - Ayako Nishioka
- Safety Evaluation Center, Showa Denko K.K., 1-1-1 Ohnodai, Midori-ku, Chiba-shi, Chiba, 267-0056, Japan
| | - Yuji Hagiwara
- Safety Evaluation Center, Showa Denko K.K., 1-1-1 Ohnodai, Midori-ku, Chiba-shi, Chiba, 267-0056, Japan
| | - Kei Sato
- Safety Evaluation Center, Showa Denko K.K., 1-1-1 Ohnodai, Midori-ku, Chiba-shi, Chiba, 267-0056, Japan
| | - Tadashi Yoneda
- Safety Evaluation Center, Showa Denko K.K., 1-1-1 Ohnodai, Midori-ku, Chiba-shi, Chiba, 267-0056, Japan
| | - Tamami Koyama
- Institute for Advanced and Core Technology, Showa Denko K.K., 1-1-1 Ohnodai, Midori-ku, Chiba-shi, Chiba, 267-0056, Japan
| | - Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
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Horie M, Sato H, Tada A, Nakamura S, Sugino S, Tabei Y, Katoh M, Toyotome T. Regional characteristics of Lactobacillus plantarum group strains isolated from two kinds of Japanese post-fermented teas, Ishizuchi-kurocha and Awa-bancha. Biosci Microbiota Food Health 2018; 38:11-22. [PMID: 30705798 PMCID: PMC6343053 DOI: 10.12938/bmfh.18-005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 09/24/2018] [Indexed: 12/25/2022]
Abstract
Properties of Lactobacillus plantarum group strains isolated from two kinds of Japanese post-fermented teas, Ishizuchi-kurocha and Awa-bancha, were compared. Although
lactic acid bacteria isolated from the fermented teas were identified as L. plantarum via homology comparison of 16S ribosomal RNA gene sequences, classification of
L. plantarum based on ribosomal proteins showed that the strains isolated from Ishizuchi-kurocha and Awa-bancha were different. According to classification by the
ribosomal protein typing, Ishizuchi-kurocha-derived strains belong to the same group as L. plantarum subsp. plantarum JCM 1149T.
Awa-bancha-derived strains were assigned to a different group. This pattern was also applicable to strains isolated more than 10 years ago. A further analysis based on recA
and a dnaK gene showed that Awa-bancha-derived strains were closely related to L. pentosus. The interactions with cultured cells were different between
strain JCM 1149T and the Ishizuchi-kurocha-derived strains. The Ishizuchi-kurocha-derived strains showed strong adhesion to Caco-2 cells. In contrast, strain JCM 1149T
and the Awa-bancha-derived strains hardly adhered to Caco-2 cells. According to the ribosomal protein typing, sugar utilization, and interaction with Caco-2 cells, although these properties
were dependent on the strain strictly speaking, the L. plantarum group strains in this study can be subdivided into two groups: (1) type strain JCM 1149T and
Ishizuchi-kurocha-derived strains and (2) Awa-bancha-derived strains. A regionally unique microorganism may persist in each traditional fermented drink.
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Affiliation(s)
- Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-Cho, Takamatsu, Kagawa, Japan
| | - Hiroaki Sato
- Reserch Institute for Sustainable Chemistry, AIST, 1-1-1 Higashi, Tsukuba, Japan
| | - Atsumi Tada
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-Cho, Takamatsu, Kagawa, Japan
| | - Sayaka Nakamura
- Reserch Institute for Sustainable Chemistry, AIST, 1-1-1 Higashi, Tsukuba, Japan
| | - Sakiko Sugino
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-Cho, Takamatsu, Kagawa, Japan
| | - Yosuke Tabei
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi-Cho, Takamatsu, Kagawa, Japan
| | - Miyuki Katoh
- Professor Emeritus of Kagawa University, 232-3 Donyu, Wakayama, Wakayama 640-8432, Japan
| | - Takahito Toyotome
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Nishi 2-11, Inada-Cho, Obihiro, Hokkaido 080-8555, Japan
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Horie M, Shimizu K, Tabei Y. Validation of metallothionein, interleukin-8, and heme oxygenase-1 as markers for the evaluation of cytotoxicity caused by metal oxide nanoparticles. Toxicol Mech Methods 2018; 28:630-638. [PMID: 29882686 DOI: 10.1080/15376516.2018.1486931] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Metal oxide nanoparticles have an industrial value, although their harmful effects are also known. Induction of respiratory inflammation through their inhalation is a serious indicator of their toxicity. Although the phenomenon of metal ion release is involved in the induction of inflammation, all metal ions are not necessarily toxic. However, currently, no particular index to evaluate cytotoxicity caused by nanoparticles exists. An index based on biological response is critical. In the present study, we examined the gene expression-based index for nanoparticle-derived cytotoxicity. The cellular effects of six kinds of metal oxide nanoparticles, ZnO, NiO, CuO, MgO, Bi2O3, and MoO3 on A549 cells were examined. It was seen that lactate dehydrogenase (LDH) assay, which is one of the most important assays for assessing cell membrane damage, is inhibited by metal ions released from the metal oxide nanoparticles. In some cases, enzyme activity-based assay was not suitable for the evaluation of cytotoxicity of nanoparticles. ZnO and CuO nanoparticles displayed severe cytotoxicity and enhanced gene expression of heme oxygenase-1 (HO-1) and interleukin-8 (IL-8). The IL-8 gene expression was also increased from Bi2O3 exposure. Additionally, the gene expression of metallothionein 2A (MT2A) was enhanced in the ZnO, CuO, and Bi2O3 exposed cells. These results suggest that these nanoparticles released metal ions in the cells. The enhancement of HO-1, IL-8, and MT2A gene expressions was related to the cytotoxic activity of metal oxide nanoparticles. Thus, the expression level of these genes is a good indicator of nanotoxicology of metal oxide nanoparticles.
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Affiliation(s)
- Masanori Horie
- a Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
| | - Kaori Shimizu
- a Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan.,b Graduate School of Life Sciences , Toyo University , Itakura , Gunma , Japan
| | - Yosuke Tabei
- a Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
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Pham T, Fujiyoshi A, Hisamatsu T, Kadota A, Kadowaki S, Zaid M, Kunimura A, Tori S, Horie M, Miura M, Ueshima H. P2508Smoking associates with higher incidence and progression of coronary atherosclerosis in a community-based sample of japanese men: a cohort study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2508] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T Pham
- Shiga University of Medical Science, Otsu, Japan
| | - A Fujiyoshi
- Shiga University of Medical Science, Otsu, Japan
| | | | - A Kadota
- Shiga University of Medical Science, Otsu, Japan
| | - S Kadowaki
- Shiga University of Medical Science, Otsu, Japan
| | - M Zaid
- Shiga University of Medical Science, Otsu, Japan
| | - A Kunimura
- Shiga University of Medical Science, Otsu, Japan
| | - S Tori
- Shiga University of Medical Science, Otsu, Japan
| | - M Horie
- Shiga University of Medical Science, Otsu, Japan
| | - M Miura
- Shiga University of Medical Science, Otsu, Japan
| | - H Ueshima
- Shiga University of Medical Science, Otsu, Japan
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48
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Kohjitani H, Kouda S, Himeno Y, Makiyama T, Yokoi F, Hirose S, Wuriyanghai Y, Yamamoto Y, Horie M, Kimura T, Noma A, Amano A. P2839Significance of cell-specific precise computer simulation using new mathematical models of human induced pluripotent stem cell derived cardiomyocyte in drug testing. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2839] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- H Kohjitani
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - S Kouda
- Ritsumeikan University, Graduate School of Life Sciences, Kusatsu, Japan
| | - Y Himeno
- Ritsumeikan University, Graduate School of Life Sciences, Kusatsu, Japan
| | - T Makiyama
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - F Yokoi
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - S Hirose
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - Y Wuriyanghai
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - Y Yamamoto
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - M Horie
- Shiga University of Medical Science, Department of Cardiovascular and Respiratory Medicine, Otsu, Japan
| | - T Kimura
- Kyoto University Graduate School of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - A Noma
- Ritsumeikan University, Graduate School of Life Sciences, Kusatsu, Japan
| | - A Amano
- Ritsumeikan University, Graduate School of Life Sciences, Kusatsu, Japan
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Tabei Y, Sugino S, Nakajima Y, Horie M. Reactive oxygen species independent genotoxicity of indium tin oxide nanoparticles triggered by intracellular degradation. Food Chem Toxicol 2018; 118:264-271. [PMID: 29772267 DOI: 10.1016/j.fct.2018.05.036] [Citation(s) in RCA: 11] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/09/2018] [Accepted: 05/11/2018] [Indexed: 11/24/2022]
Abstract
Indium tin oxide (ITO) is widely used as a transparent conducting electrode in photoelectron devices. Because ITO production has soared, the potential health hazards caused by occupational exposure to this material have attracted much attention. However, little is known about the mechanisms of the toxic action of ITO nanoparticles (NPs). The present study was designed to examine the genotoxic mechanisms of ITO NPs using human lung epithelial A549 cells. We found that exposing A549 cells to ITO NPs triggered the intracellular accumulation of ITO NPs, the generation of reactive oxygen species (ROS), and the induction of DNA damage. Treatment of the cells with N-acetyl-l-cysteine (NAC), an ROS quenching agent, decreased intracellular ROS levels but not DNA damage, indicating that the genotoxic effect of ITO NPs is not mediated by intracellular ROS. Interestingly, treatment with ammonium chloride, a lysosomotropic agent, decreased intracellular solubility of ITO NPs and attenuated DNA damage. Nuclear accumulation of indium ions in ITO-NP-exposed cells was confirmed by inductively coupled plasma-mass spectrometry. Our results indicate that the ITO-NP-mediated genotoxicity is caused by indium ions that are solubilized in the acidic lysosomal condition and accumulated in the nucleus where they damage DNA, without the involvement of ROS.
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Affiliation(s)
- Yosuke Tabei
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan.
| | - Sakiko Sugino
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Yoshihiro Nakajima
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
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50
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Konoeda C, Guan Z, Watanabe T, Horie M, Pilon A, Liu M, Waddell T, Juvet S, Keshavjee S, Martinu T. Club Cell Secretory Protein Replacement Therapy in a Murine Lung Transplant Model of Obliterative Bronchiolitis. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.583] [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: 10/17/2022] Open
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