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Ulferts S, Lopes M, Miyamoto K, Grosse R. Nuclear actin dynamics and functions at a glance. J Cell Sci 2024; 137:jcs261630. [PMID: 38563209 DOI: 10.1242/jcs.261630] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024] Open
Abstract
Actin is well known for its cytoskeletal functions, where it helps to control and maintain cell shape and architecture, as well as regulating cell migration and intracellular cargo transport, among others. However, actin is also prevalent in the nucleus, where genome-regulating roles have been described, including it being part of chromatin-remodeling complexes. More recently, with the help of advances in microscopy techniques and specialized imaging probes, direct visualization of nuclear actin filament dynamics has helped elucidate new roles for nuclear actin, such as in cell cycle regulation, DNA replication and repair, chromatin organization and transcriptional condensate formation. In this Cell Science at a Glance article, we summarize the known signaling events driving the dynamic assembly of actin into filaments of various structures within the nuclear compartment for essential genome functions. Additionally, we highlight the physiological role of nuclear F-actin in meiosis and early embryonic development.
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Affiliation(s)
- Svenja Ulferts
- Institute for Clinical and Experimental Pharmacology and Toxicology I, Medical Faculty, University of Freiburg, 79104 Freiburg, Germany
| | - Massimo Lopes
- Institute of Molecular Cancer Research, University of Zurich, 8057 Zurich, Switzerland
| | - Kei Miyamoto
- Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Robert Grosse
- Institute for Clinical and Experimental Pharmacology and Toxicology I, Medical Faculty, University of Freiburg, 79104 Freiburg, Germany
- Centre for Integrative Biological Signalling Studies (CIBSS), 79104 Freiburg, Germany
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2
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Iwata T, Kousa T, Nishioka Y, Ohwada K, Sumida K, Annese E, Kakoki M, Kuroda K, Iwasawa H, Arita M, Kumar S, Kimura A, Miyamoto K, Okuda T. Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector. Sci Rep 2024; 14:127. [PMID: 38177136 PMCID: PMC10766951 DOI: 10.1038/s41598-023-47719-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 11/17/2023] [Indexed: 01/06/2024] Open
Abstract
We have developed a state-of-the-art apparatus for laser-based spin- and angle-resolved photoemission spectroscopy with micrometer spatial resolution (µ-SARPES). This equipment is realized by the combination of a high-resolution photoelectron spectrometer, a 6 eV laser with high photon flux that is focused down to a few micrometers, a high-precision sample stage control system, and a double very-low-energy-electron-diffraction spin detector. The setup achieves an energy resolution of 1.5 (5.5) meV without (with) the spin detection mode, compatible with a spatial resolution better than 10 µm. This enables us to probe both spatially-resolved electronic structures and vector information of spin polarization in three dimensions. The performance of µ-SARPES apparatus is demonstrated by presenting ARPES and SARPES results from topological insulators and Au photolithography patterns on a Si (001) substrate.
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Affiliation(s)
- Takuma Iwata
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2), Hiroshima University, Higashi-hiroshima, 739-8526, Japan
| | - T Kousa
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Y Nishioka
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - K Ohwada
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - K Sumida
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo-gun, Hyogo, 679-5148, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - E Annese
- Brazilian Center for Research in Physics, Rua Dr. Xavier Sigaud 150, Rio de Janeiro, RJ, 22290-180, Brazil
| | - M Kakoki
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Kenta Kuroda
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan.
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2), Hiroshima University, Higashi-hiroshima, 739-8526, Japan.
| | - H Iwasawa
- Institute for Advanced Synchrotron Light Source, National Institutes for Quantum Science and Technology, Sendai, 980-8579, Japan
- Synchrotron Radiation Research Center, National Institutes for Quantum Science and Technology, Hyogo, 679-5148, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - M Arita
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - S Kumar
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - A Kimura
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2), Hiroshima University, Higashi-hiroshima, 739-8526, Japan
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - T Okuda
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
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Ihashi S, Hamanaka M, Kaji M, Mori R, Nishizaki S, Mori M, Imasato Y, Inoue K, Matoba S, Ogonuki N, Takasu A, Nakamura M, Matsumoto K, Anzai M, Ogura A, Ikawa M, Miyamoto K. Incomplete activation of Alyref and Gabpb1 leads to preimplantation arrest in cloned mouse embryos. Life Sci Alliance 2023; 6:e202302296. [PMID: 37640449 PMCID: PMC10462978 DOI: 10.26508/lsa.202302296] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/31/2023] Open
Abstract
Differentiated cell nuclei can be reprogrammed after nuclear transfer (NT) to oocytes and the produced NT embryos can give rise to cloned animals. However, development of NT embryos is often hampered by recurrent reprogramming failures, including the incomplete activation of developmental genes, yet specific genes responsible for the arrest of NT embryos are not well understood. Here, we searched for developmentally important genes among the reprogramming-resistant H3K9me3-repressed genes and identified Alyref and Gabpb1 by siRNA screening. Gene knockout of Alyref and Gabpb1 by the CRISPR/Cas9 system resulted in early developmental arrest in mice. Alyref was needed for the proper formation of inner cell mass by regulating Nanog, whereas Gabpb1 deficiency led to apoptosis. The supplement of Alyref and Gabpb1 mRNA supported efficient preimplantation development of cloned embryos. Alyref and Gabpb1 were silenced in NT embryos partially because of the repressed expression of Klf16 by H3K9me3. Thus, our study shows that the H3K9me3-repressed genes contain developmentally required genes, and the incomplete activation of such genes results in preimplantation arrest of cloned embryos.
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Affiliation(s)
- Shunya Ihashi
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Mizuto Hamanaka
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Masaya Kaji
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Ryunosuke Mori
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Shuntaro Nishizaki
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Miki Mori
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Yuma Imasato
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Kimiko Inoue
- https://ror.org/00s05em53 Bioresource Engineering Division, RIKEN Bioresource Research Center, Tsukuba, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Shogo Matoba
- https://ror.org/00s05em53 Bioresource Engineering Division, RIKEN Bioresource Research Center, Tsukuba, Japan
- Cooperative Division of Veterinary Sciences, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Narumi Ogonuki
- https://ror.org/00s05em53 Bioresource Engineering Division, RIKEN Bioresource Research Center, Tsukuba, Japan
| | - Atsushi Takasu
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Misaki Nakamura
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Kazuya Matsumoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Masayuki Anzai
- Institute of Advanced Technology, Kindai University, Wakayama, Japan
| | - Atsuo Ogura
- https://ror.org/00s05em53 Bioresource Engineering Division, RIKEN Bioresource Research Center, Tsukuba, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Masahito Ikawa
- Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Kei Miyamoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
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Iqbal MA, Miyamoto K, Yumoto E, Oogai S, Mutanda I, Inafuku M, Oku H. Relationship between seasonal variation in isoprene emission and plant hormone profiles in the tropical plant Ficus septica. Plant Biol (Stuttg) 2023; 25:981-993. [PMID: 37565537 DOI: 10.1111/plb.13565] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/19/2023] [Indexed: 08/12/2023]
Abstract
In Ficus septica, the short-term control of isoprene production and, therefore, isoprene emission has been linked to the hormone balance between auxin (IAA) and jasmonic acid (JA). However, the relationship between long-term changes in isoprene emission and that of plant hormones remains unknown. This study tracked isoprene emissions from F. septica leaves, plant hormone concentrations and signalling gene expression, MEP pathway metabolite concentrations, and related enzyme gene expression for 1 year in the field to better understand the role of plant hormones and their long-term control. Seasonality of isoprenes was mainly driven by temperature- and light-dependent variations in substrate availability through the MEP route, as well as transcriptional and post-transcriptional control of isoprene synthase (IspS). Isoprene emissions are seasonally correlated with plant hormone levels. This was especially evident in the cytokinin profiles, which decreased in summer and increased in winter. Only 4-hydroxy-3-methylbut-2-butenyl-4-diphosphate (HMBDP) exhibited a positive connection with cytokinins among the MEP metabolites examined, suggesting that HMBDP and its biosynthetic enzyme, HMBDP synthase (HDS), play a role in channelling of MEP pathway metabolites to cytokinin production. Thus, it is probable that cytokinins have potential feed-forward regulation of isoprene production. Under long-term natural conditions, the hormonal balance of IAA/JA-Ile was not associated with IspS transcripts or isoprene emissions. This study builds on prior work by revealing differences between short- and long-term hormonal modulation of isoprene emissions in the tropical tree F. septica.
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Affiliation(s)
- M A Iqbal
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - K Miyamoto
- Department of Biosciences, Teikyo University, Utsunomiya, Tochigi, Japan
| | - E Yumoto
- Advanced Instrumental Analysis Center, Teikyo University, Tochigi, Japan
| | - S Oogai
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
| | - I Mutanda
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - M Inafuku
- Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan
| | - H Oku
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
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Tomita T, Toda M, Kaneko A, Murakumo K, Miyamoto K, Sato K. Successful delivery of viviparous lantern shark from an artificial uterus and the self-production of lantern shark luciferin. PLoS One 2023; 18:e0291224. [PMID: 37756258 PMCID: PMC10530027 DOI: 10.1371/journal.pone.0291224] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 08/24/2023] [Indexed: 09/29/2023] Open
Abstract
Our recent success in the long-term maintenance of lantern shark embryos in artificial uterine systems has provided a novel option for the medical treatment of premature embryos for captive viviparous elasmobranchs. The remaining issue with this system is that the embryos cannot survive the abrupt change in the chemical environment from artificial uterine fluid (AUF) to seawater during delivery. To overcome this issue, the present study developed a new protocol for seawater adaptation, which is characterized by a long-term and stepwise shift from AUF to seawater prior to delivery. This protocol was employed successfully, and the specimen survived for more than seven months after delivery, the longest captive record of the species. During the experiment, we unexpectedly detected bioluminescence of the embryonic lantern shark in the artificial uterus. This observation indicates that lantern sharks can produce luciferin, a substance for bioluminescence. This contradicts the recent hypothesis that lantern sharks lack the ability to produce luciferin and use luciferin obtained from food sources.
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Affiliation(s)
- Taketeru Tomita
- Okinawa Churashima Research Institute, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
- Okinawa Churaumi Aquarium, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
| | - Minoru Toda
- Okinawa Churaumi Aquarium, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
| | - Atsushi Kaneko
- Okinawa Churaumi Aquarium, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
| | - Kiyomi Murakumo
- Okinawa Churashima Foundation Veterinary Hospital, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
| | - Kei Miyamoto
- Okinawa Churashima Research Institute, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
- Okinawa Churaumi Aquarium, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
| | - Keiichi Sato
- Okinawa Churashima Research Institute, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
- Okinawa Churaumi Aquarium, Okinawa Churashima Foundation, Motobu, Okinawa, Japan
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Sugiyama T, Miyamoto K, Yamamoto T, Tokuyama T, Akiyama H, Shimizu K. Atlantoaxial Instability after Treatment of Atlantoaxial Rotatory Fixation: A Case Report. J Orthop Case Rep 2023; 13:105-109. [PMID: 37398533 PMCID: PMC10308970 DOI: 10.13107/jocr.2023.v13.i06.3714] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/10/2023] [Indexed: 07/04/2023] Open
Abstract
Introduction We encountered a case of atlantoaxial subluxation (AAS) after treatment of atlantoaxial rotatory fixation (AARF). Reports of developing AAS after AARF are extremely rare. Case Report An 8-year-old male who feels neck pain was diagnosed with AARF type II according to the Fielding classification. Computed tomography (CT) showed that the atlas was rotated 32° to the right relative to the axis. Neck collar, Glisson traction, and reduction under anesthesia were performed. Five months after the onset of AARF, the patient was diagnosed with AAS due to dilatation of atlantodental interval (ADI) and underwent posterior cervical fusion. Conclusion AARF treatments, such as long-term Glisson traction and reduction under general anesthesia, which exert a stress on the cervical spine, may damage the alar ligaments, apical ligaments, lower longitudinal band, and Gruber's ligament. Transverse ligament damage can also occur during the treatment of AARF, especially if AARF is refractory or requires long-term treatment. In addition, knowledge of the pathophysiology of atlantoaxial instability after AARF treatment is important.
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Affiliation(s)
- Takaaki Sugiyama
- Department of Orthopaedic Surgery, Central Japan International Medical Center, Minokamo, Japan
| | - Kei Miyamoto
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, Gifu, Japan
| | | | - Tsuyoshi Tokuyama
- Department of Orthopaedic Surgery, Kibogaoka Medical and Support Center for Children, Gifu, Japan
| | - Haruhiko Akiyama
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Katsuji Shimizu
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, Gifu, Japan
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Tomikawa J, Miyamoto K. Structural alteration of the nucleus for the reprogramming of gene expression. FEBS J 2022; 289:7221-7233. [PMID: 33891358 DOI: 10.1111/febs.15894] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 03/05/2021] [Revised: 04/06/2021] [Accepted: 04/19/2021] [Indexed: 01/13/2023]
Abstract
The regulation of gene expression is a critical process for establishing and maintaining cellular identity. Gene expression is controlled through a chromatin-based mechanism in the nucleus of eukaryotic cells. Recent studies suggest that chromatin accessibility and the higher-order structure of chromatin affect transcriptional outcome. This is especially evident when cells change their fate during development and nuclear reprogramming. Furthermore, non-chromosomal contents of the cell nucleus, namely nucleoskeleton proteins, can also affect chromatin and nuclear structures, resulting in transcriptional alterations. Here, we review our current mechanistic understanding about how chromatin and nuclear structures impact transcription in the course of embryonic development, cellular differentiation and nuclear reprogramming, and also discuss unresolved questions that remain to be addressed in the field.
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Affiliation(s)
- Junko Tomikawa
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Kei Miyamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
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Mahadevan G, Murugesan P, Sreekanth GB, Miyamoto K, McMahan CD. First distributional record of Parascolopsis akatamae Miyamoto, McMahan, & Kaneko, 2020, a dwarf monocle bream (Perciformes, Nemipteridae), from Indian waters. CheckList 2022. [DOI: 10.15560/18.5.973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
New records of Parascolopsis akatamae Miyamoto, McMahan, & Kaneko, 2020 are reported from India’s southeast coast. Three specimens were collected in April 2021 on the Parangipettai coast, Tamil Nadu, India. We examined and compared morphometric and meristic characters of our specimens with published data from the holotype. The new India records expand the known distribution of P. akatamae, which had previously been reported from southern Japan, Taiwan, Indonesia, and Thailand. Parascolopsis akatamae is a new addition to the list of marine fishes from Indian coastal waters.
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Yamabe K, Arakawa Y, Shoji M, Miyamoto K, Tsuchiya T, Minoura K, Akeda Y, Tomono K, Onda M. Enhancement ofAcinetobacterbaumanniibiofilm growth by cephem antibiotics via enrichment of protein and extracellular DNAin thebiofilm matrices. J Appl Microbiol 2022; 133:2002-2013. [PMID: 35818769 PMCID: PMC9539989 DOI: 10.1111/jam.15712] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 06/03/2022] [Accepted: 07/06/2022] [Indexed: 11/30/2022]
Abstract
AIMS To determine the effects of subinhibitory concentrations of eight cephem and carbapenem antibiotics on thebiofilm formation ofAcinetobacterbaumanniicells and examine itseffect on pre-established biofilms. METHODS AND RESULTS Effects of antibiotics on biofilm formation were assayed using microtiter plates with polystyrene peg-lids.Cefmetazole, ceftriaxone, ceftazidime, and cefpirome increased the biomass of pre-established biofilms on pegs in the range of their sub-minimum inhibitory concentrations, whereas none increased biofilm formation by planktonic cells. Carbapenems had a negative effect.The constituents of antibiotic-induced biofilms were analyzed. Ceftriaxoneor ceftazidimetreatment markedly increased the matrix constituent amounts in the biofilms (carbohydrate, 2.7-fold; protein, 8.9-12.7-fold; lipid, 3.3-3.6-fold; DNA, 9.1-12.2-fold; outer membrane vesicles, 2.7-3.8-fold; and viable cells,6.8-10.1-fold).The antibiotic-enhanced biofilmshad increased outer membrane protein A and were resistant to the anti-biofilm effect of azithromycin. CONCLUSIONS Some cephems increased the biomass of pre-established biofilms in the ranges of their sub-minimum inhibitory concentrations.The antibiotic-enhanced biofilmspossessed more virulent characteristics than normal biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY Incomplete administration of certain cephems followingbiofilm-related Ac.baumannii infectionscould adversely cause exacerbated and chronic clinical results.
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Affiliation(s)
- K Yamabe
- Department of Social and Administrative Pharmacy, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - Y Arakawa
- Department of Social and Administrative Pharmacy, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - M Shoji
- Department of Social and Administrative Pharmacy, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - K Miyamoto
- Department of Microbiology and Infection Control, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - T Tsuchiya
- Department of Microbiology and Infection Control, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - K Minoura
- Joint Research Center, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - Y Akeda
- National Institute of Infectious Diseases, Tokyo, Japan
| | - K Tomono
- Osaka Institute of Public Health, Osaka, Japan
| | - M Onda
- Department of Social and Administrative Pharmacy, Osaka Medical and Pharmaceutical University, Osaka, Japan
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Ibrahim A, Ciullo A, Li C, Garcia G, Peck K, Miyamoto K, Arumugaswami V, Marbán E. Engineered extracellular vesicles antagonize SARS-CoV-2 infection by inhibiting mTOR signaling. Biomater Biosyst 2022; 6:100042. [PMID: 35187508 PMCID: PMC8841010 DOI: 10.1016/j.bbiosy.2022.100042] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 02/11/2022] [Accepted: 02/12/2022] [Indexed: 01/19/2023] Open
Abstract
Effective treatment approaches for patients with COVID-19 remain limited and are neither curative nor widely applicable. Activated specialized tissue effector extracellular vesicles (ASTEX) derived from genetically-enhanced skin fibroblasts, exert disease-modifying bioactivity in vivo in models of heart and lung injury. Here we report that ASTEX antagonizes SARS-CoV-2 infection and its pathogenic sequelae. In human lung epithelial cells exposed to SARS-CoV-2, ASTEX is cytoprotective and antiviral. Transcriptomic analysis implicated the mammalian target of rapamycin (mTOR) pathway, as infected cells upregulated mTOR signaling and pre-exposure to ASTEX attenuated it. The implication of mTOR signaling was further confirmed using mTOR inhibition and activation, which increased and decreased viral load, respectively. Dissection of ASTEX cargo identifies miRs including miR-16 as potential inhibitors of mTOR signaling. The findings reveal a novel, dual mechanism of action for ASTEX as a therapeutic candidate for COVID-19, with synergistic antiviral and cytoprotective benefits.
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Affiliation(s)
- A.G. Ibrahim
- Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - A. Ciullo
- Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - C. Li
- Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - G. Garcia
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - K. Peck
- Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - K. Miyamoto
- Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - V. Arumugaswami
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - E. Marbán
- Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
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Gunasekaran S, Miyagawa Y, Miyamoto K. Actin nucleoskeleton in embryonic development and cellular differentiation. Curr Opin Cell Biol 2022; 76:102100. [DOI: 10.1016/j.ceb.2022.102100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 03/28/2022] [Accepted: 04/22/2022] [Indexed: 11/03/2022]
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12
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Takeuchi H, Yamamoto M, Fukui M, Inoue A, Maezawa T, Nishioka M, Kondo E, Ikeda T, Matsumoto K, Miyamoto K. Single‐cell profiling of transcriptomic changes during
in vitro
maturation of human oocytes. Reprod Med Biol 2022; 21:e12464. [PMID: 35582522 PMCID: PMC9084694 DOI: 10.1002/rmb2.12464] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 11/24/2022] Open
Abstract
Purpose In vitro maturation (IVM) of human oocytes offers an invaluable opportunity for infertility treatment. However, in vitro matured oocytes often show lower developmental abilities than their in vivo counterparts, and molecular mechanisms underlying successful maturation remain unclear. In this study, we investigated gene expression profiles of in vitro matured oocytes at the single‐cell level to gain mechanistic insight into IVM of human oocytes. Methods Human oocytes were retrieved by follicular puncture and in vitro matured. In total, 19 oocytes from 11 patients were collected and subjected to single‐cell RNA‐seq analyses. Results Global gene expression profiles were similar among oocytes at the same maturation stage, while a small number of oocytes showed distinct transcriptomes from those at the corresponding maturation stage. Differential gene expression analysis identified hundreds of transcripts that dynamically altered their expression during IVM, and we revealed molecular pathways and upstream regulators that may govern oocyte maturation. Furthermore, oocytes that were delayed in their maturation showed distinct transcriptomes. Finally, we identified genes whose transcripts were enriched in each stage of oocyte maturation. Conclusions Our work uncovers transcriptomic changes during human oocyte IVM and the differential gene expression profile of each oocyte.
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Affiliation(s)
- Hiroki Takeuchi
- Department of Obstetrics and Gynecology Graduate School of Medicine Mie University Mie Japan
| | - Mari Yamamoto
- Graduate School of Biology‐Oriented Science and Technology Kindai University Wakayama Japan
| | - Megumi Fukui
- Department of Obstetrics and Gynecology Graduate School of Medicine Mie University Mie Japan
| | - Akihiro Inoue
- Graduate School of Biology‐Oriented Science and Technology Kindai University Wakayama Japan
| | - Tadashi Maezawa
- Department of Obstetrics and Gynecology Graduate School of Medicine Mie University Mie Japan
| | - Mikiko Nishioka
- Department of Obstetrics and Gynecology Graduate School of Medicine Mie University Mie Japan
| | - Eiji Kondo
- Department of Obstetrics and Gynecology Graduate School of Medicine Mie University Mie Japan
| | - Tomoaki Ikeda
- Department of Obstetrics and Gynecology Graduate School of Medicine Mie University Mie Japan
| | - Kazuya Matsumoto
- Graduate School of Biology‐Oriented Science and Technology Kindai University Wakayama Japan
| | - Kei Miyamoto
- Graduate School of Biology‐Oriented Science and Technology Kindai University Wakayama Japan
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13
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Iqbal MA, Miyamoto K, Yumoto E, Parveen S, Mutanda I, Inafuku M, Oku H. Plant hormone profile and control over isoprene biosynthesis in a tropical tree Ficus septica. Plant Biol (Stuttg) 2022; 24:492-501. [PMID: 35050526 DOI: 10.1111/plb.13386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Plant hormone signalling and the circadian clock have been implicated in the transcriptional control of isoprene biosynthesis. To gain more insight into the hormonal control of isoprene biosynthesis, the present study measured plant hormone concentrations in jasmonic acid (JA)-treated leaves of our previous model study, examined their relationship with gene expression of isoprene synthase (IspS) and hormone signalling transcription factors. Of the plant hormones, IAA and JA-Ile and their related transcription factors (MYC2 and SAUR21) were significantly correlated with IspS gene expression. Concentrations of cytokinins, isopentenyladenine (iP), trans-zeatin riboside (tZR) and cis-zeatin riboside (cZR), were similarly significantly correlated with IspS expression. However, there was no significant correlation between their related transcription factor (ARR-B) and IspS expression. The circadian clock-related gene PRR7, but not the transcription factor LHY, was highly correlated with IspS expression. These results suggest that the hormonal balance between JA-Ile and IAA plays a central role in transcriptional regulation of IspS through the transcription factors MYC2 and SAUR21, the early auxin responsive genes. The putative cis-acting elements for SAUR on the IspS promoter (TGTCNN and CATATG), in addition to the G-box for MYC2, support the above proposal. These results provide insightful information on the core components of plant hormone-related regulation of IspS under coordination with the circadian clock genes.
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Affiliation(s)
- Md A Iqbal
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - K Miyamoto
- Department of Biosciences, Teikyo University, Utsunomiya, Tochigi, Japan
| | - E Yumoto
- Advanced Instrumental Analysis Center, Teikyo University, Tochigi, Japan
| | - S Parveen
- Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - I Mutanda
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, Jiangsu, China
| | - M Inafuku
- Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan
| | - H Oku
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
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Kato K, Miyamoto K, Shimizu K, Yozawa S, Ishii M, Akiyama H. A Rare Case of Cervical Myelopathy Caused by an Anomaly of the Axis: A Case Report and a Review of Current Comprehensive Literature. J Orthop Case Rep 2022; 12:54-57. [PMID: 35611279 PMCID: PMC9091385 DOI: 10.13107/jocr.2022.v12.i01.2616] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/14/2021] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION Cervical myelopathy due to anomalies of the posterior elements of the axis is rare, and limited cases have been reported. This study reports such a unique case of congenital anomaly of the laminae of the axis, which is treated by partial removal of the anomalous bony structure surgically, and provides a comprehensive review of the present literature on this pathological condition. CASE PRESENTATION A 65-year-old man presented with a 3-year history of numbness in both arms with a sensory change in the right arm. Six months before admission, he noticed weakness in his right upper extremities and stiffness of the right lower extremity. Magnetic resonance imaging (MRI) showed a bilaterally compressed spinal cord with an anomalous bony structure at the C2-3 level. Computed tomography (CT) showed an invaginated abnormal bony structure at the C2-3 level and an abnormal lateral mass on the right side at the C2-3 level. The patient underwent posterior decompression surgery using the conventional open approach. One year after surgery, his myelopathy partially ameliorated, with his cervical radiograph showing no signs of the secondary instability and MRI showing sufficient decompression of the spinal cord. The age of onset, symptoms, and surgical treatment in our case was similar to those in the 14 previously reported cases; however, the morphology of the anomaly had variations. CONCLUSION This is a report of a rare anomaly in the laminae of the axis. MRI and reconstructed CT scans were useful for the treatment of this case. Partial surgical removal was an appropriate treatment for this patient, resulting in a satisfactory outcome.
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Affiliation(s)
- Koki Kato
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, 7-1 Kashima-Cho, Gifu City, Gifu 500-8513, Japan,Address of Correspondence: Dr. Koki Kato, Department of Orthopaedic Surgery, Gifu Municipal Hospital, 7-1 Kashima-Cho, Gifu City, Gifu 500-8513, Japan. E-mail:
| | - Kei Miyamoto
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, 7-1 Kashima-Cho, Gifu City, Gifu 500-8513, Japan
| | - Katsuji Shimizu
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, 7-1 Kashima-Cho, Gifu City, Gifu 500-8513, Japan
| | - Sain Yozawa
- Yozawa Orthopedic Clinic, 2216-1 Komuro, Ina-Machi, Kitaadachi-Gun, Saitama 362-0806, Japan
| | - Mitsukazu Ishii
- Yoro Orthopedic Clinic, 534 Oato, Yoro-Cho, Yoro-Gun, Gifu 503-1324, Japan
| | - Haruhiko Akiyama
- Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, 1-1Yanagido, Gifu City, Gifu 501-1194, Japan
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15
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Sezaki A, Imai T, Miyamoto K, Kawase F, Shirai Y, Abe C, Sanada M, Inden A, Kato T, Sugihara N, Shimokata H. Association between the Mediterranean Diet Score and Healthy Life Expectancy: A Global Comparative Study. J Nutr Health Aging 2022; 26:621-627. [PMID: 35718872 DOI: 10.1007/s12603-022-1811-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Extending healthy life expectancy (HALE), defined as the average number of years that a person can expect to live in "full health" by taking into account years lived in less than full health due to disease and/or injury, is a common topic worldwide. This study aims to clarify the relationships between the Mediterranean diet score (MDS) and life expectancy (LE) and HALE globally using publicly available international data. SETTING Analyses were conducted on 130 countries with populations of 1 million or more for which all data were available. Individual countries were scored from 0 to 9 to indicate adherence to the Mediterranean diet according to the MDS scoring method. The supply of vegetables, legumes, fruits and nuts, cereals, fish, and olive oil per 1,000 kcal per country was calculated based on the Food and Agriculture Organization Corporate Statistical Database, with a score of 1 for above the median and 0 for below. The same method was used to calculate scores of presumed detrimental components (meat and dairy), with consumption below the median given a value of 1, and consumption above the median given a value of 0. For ethanol, a score of 1 was given for 10g to 50 g of consumption. We investigated the cross-sectional associations between the MDS and LE and HALE at birth in 2009, and the longitudinal associations between the MDS in 2009 and LE and HALE between 2009 and 2019, controlling for covariates at baseline using linear mixed models. RESULTS In the cross-sectional analysis, the MDS was significantly positively associated with LE (β=0.906 [95% confidence interval, 0.065-1.747], p=0.037) and HALE (β=0.875 [0.207-1.544], p=0.011) after controlling for all covariates. The longitudinal analysis also revealed significantly positive associations between the MDS and LE (0.621 [0.063-1.178], p=0.030) and HALE (0.694 [0.227-1.161], p=0.004) after controlling for all covariates. CONCLUSION The present study, based on an analysis using 10 years of international data, showed that countries with a higher MDS showed a positive association with HALE.
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Affiliation(s)
- A Sezaki
- Ayako Sezaki, Nagoya University of Arts and Sciences, Nagoya Gakugei Daigaku, Japan,
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16
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Nozawa S, Kato H, Kawaguchi M, Nozawa A, Yamada K, Iwai C, Fushimi K, Miyamoto K, Hosoe H, Shimizu K, Matsuo M, Akiyama H. Ectopic gas in the fibular graft after anterior cervical corpectomy and fusion. BMC Musculoskelet Disord 2021; 22:995. [PMID: 34844589 PMCID: PMC8630856 DOI: 10.1186/s12891-021-04874-6] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/12/2021] [Indexed: 11/17/2022] Open
Abstract
Background Ectopic gas in the graft is occasionally encountered upon follow-up computed tomography (CT) after anterior cervical corpectomy and fusion (ACCF). However, most cases lack inflammatory responses and manifestations of infection. Although the clinical significance of ectopic gas in the graft has not yet been established, to the best of our knowledge, no previous studies have described ectopic gas in the graft after ACCF. This study evaluated ectopic gas in the fibular graft upon follow-up CT after ACCF. Methods We reviewed 112 patients who underwent ACCF and follow-up CT, with a minimum follow-up period of 3 years. CT images were retrospectively reviewed to confirm the presence of ectopic gas in the graft and bone fusion. Bone fusion was defined as follows: mobility less than 2 mm between spinous processes on the flection-extension radiograph or a bone bridge on CT images. Results Of the 112 patients, 30 (27%) patients had ectopic gas in the fibular grafts. Among them, ectopic gas was initially observed 3 months after surgery (early onset) in 23 (77%) patients and 6 months after surgery (late-onset) in the remaining seven (23%) patients. Upon the latest follow-up CT, ectopic gas more frequently remained in late-onset (4/7, 57%) rather than in early-onset (3/23, 13%) cases (p = 0.033). Bone fusion was not observed when CT images exhibited ectopic gas in the graft, whereas ectopic gas was not observed when CT images exhibited bone fusion. Conclusion Ectopic gas in the fibular graft was observed at both early and late-onset after ACCF; late-onset gas remained significantly. The remaining gas was strongly associated with pseudoarthrosis; therefore, pseudoarthrosis should be considered when ectopic gas in the graft is observed on CT images.
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Affiliation(s)
- Satoshi Nozawa
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, 1-1 Yanagido, Gifu city, Gifu, 501-1194, Japan.
| | - Hiroki Kato
- Department of Radiology, School of Medicine, Gifu University, Gifu, Japan
| | - Masaya Kawaguchi
- Department of Radiology, School of Medicine, Gifu University, Gifu, Japan
| | - Asae Nozawa
- Department of Radiology, School of Medicine, Gifu University, Gifu, Japan
| | - Kazunari Yamada
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, 1-1 Yanagido, Gifu city, Gifu, 501-1194, Japan
| | - Chizuo Iwai
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, 1-1 Yanagido, Gifu city, Gifu, 501-1194, Japan
| | - Kazunari Fushimi
- Department of Orthopaedic Surgery, Gifu Prefectural General Medical Center, Gifu, Japan
| | - Kei Miyamoto
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, Gifu, Japan
| | - Hideo Hosoe
- Department of Orthopaedic Surgery, Hirano General Hospital, Gifu, Japan
| | - Katsuji Shimizu
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, Gifu, Japan
| | - Masayuki Matsuo
- Department of Radiology, School of Medicine, Gifu University, Gifu, Japan
| | - Haruhiko Akiyama
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, 1-1 Yanagido, Gifu city, Gifu, 501-1194, Japan
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17
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Kato K, Akeda K, Miyazaki S, Yamada J, Muehleman C, Miyamoto K, Asanuma YA, Asanuma K, Fujiwara T, Lenz ME, Nakazawa T, An H, Masuda K. NF-kB decoy oligodeoxynucleotide preserves disc height in a rabbit anular-puncture model and reduces pain induction in a rat xenograft-radiculopathy model. Eur Cell Mater 2021; 42:90-109. [PMID: 34284523 DOI: 10.22203/ecm.v042a07] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 01/31/2023] Open
Abstract
While it is known that the degenerated intervertebral disc (IVD) is one of the primary reasons for low-back pain and subsequent need for medical care, there are currently no established effective methods for direct treatment. Nuclear factor-κB (NF-κB) is a transcription factor that regulates various genes' expression, among which are inflammatory cytokines, in many tissues including the IVD. NF-κB decoy is an oligodeoxynucleotide containing the NF-κB binding site that entraps NF-κB subunits, resulting in suppression of NF-κB activity. In the present preclinical study, NF-κB decoy was injected into degenerated IVDs using the rabbit anular-puncture model. In terms of distribution, NF-κB decoy persisted in the IVDs up to at least 4 weeks after injection. The remaining amount of NF-κB decoy indicated that it fit a double-exponential-decay equation. Investigation of puncture-caused degeneration of IVDs showed that NF-κB decoy injection recovered, dose-dependently, the reduced disc height that was associated with reparative cell cloning and morphological changes, as assessed through histology. Gene expression, by quantitative real-time polymerase chain reaction (qRT-PCR), showed that NF-κB decoy attenuated inflammatory gene expression, such as that of interleukin-1 and tumor necrosis factor-α, in rabbit degenerated IVDs. NF-κB decoy also reduced the pain response as seen using the "pain sensor" nude rat xenograft-radiculopathy model. This is the first report demonstrating that NF-κB decoy suppresses the inflammatory response in degenerated IVDs and restores IVD disc height loss. Therefore, the intradiscal injection of NF-κB decoy may have the potential as an effective therapeutic strategy for discogenic pain associated with degenerated IVDs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - K Masuda
- Department of Orthopedic Surgery, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093,
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18
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Shindo T, Ihashi S, Sakamoto Y, Okuno T, Tomikawa J, Miyamoto K. Visualization of endogenous nuclear F-actin in mouse embryos reveals abnormal actin assembly after somatic cell nuclear transfer. J Biochem 2021; 169:303-311. [PMID: 33169144 DOI: 10.1093/jb/mvaa125] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 10/25/2020] [Indexed: 01/13/2023] Open
Abstract
Actin in the nucleus, referred to as nuclear actin, is involved in a variety of nuclear events. Nuclear actin is present as a globular (G-actin) and filamentous form (F-actin), and dynamic assembly/disassembly of nuclear actin profoundly affects nuclear functions. However, it is still challenging to observe endogenous nuclear F-actin. Here, we present a condition to visualize endogenous nuclear F-actin of mouse zygotes using different fixation methods. Zygotes fixed with paraformaldehyde and treated with fluorescently conjugated phalloidin show both short and long actin filaments in their pronuclei. Short nuclear actin filaments are characteristic of phalloidin staining, rather than the consequence of severing actin filaments by the fixation process, since long nuclear actin filaments probed with the nuclear actin chromobody are not disassembled into short filaments after fixation with paraformaldehyde. Furthermore, we find that nuclear actin assembly is impaired after somatic cell nuclear transfer (SCNT), suggesting abnormal nucleoskeleton structures in SCNT embryos. Taken together, our presented method for visualizing nuclear F-actin with phalloidin can be used to observe the states of nuclear actin assembly, and revealed improper reprogramming of actin nucleoskeleton structures in cloned mouse embryos.
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Affiliation(s)
- Taiki Shindo
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Shunya Ihashi
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Yuko Sakamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Tomomi Okuno
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Junko Tomikawa
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Kei Miyamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
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19
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Abstract
The eukaryotic nucleus shows organized structures of chromosomes, transcriptional components and their associated proteins. It has been believed that such a dense nuclear environment prevents the formation of a cytoskeleton-like network of protein filaments. However, accumulating evidence suggests that the cell nucleus also possesses structural filamentous components to support nuclear organization and compartments, which are referred to as nucleoskeleton proteins. Nucleoskeleton proteins including lamins and actin influence nuclear dynamics including transcriptional regulation, chromatin organization and DNA damage responses. Furthermore, these nucleoskeleton proteins play a pivotal role in cellular differentiation and animal development. In this commentary, we discuss how nucleoskeleton-based regulatory mechanisms orchestrate nuclear dynamics.
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Affiliation(s)
- Kei Miyamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, 930 Nishimitani, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Masahiko Harata
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, Aramaki Aza-Aoba 468-1, Aoba-ku, Sendai 980-0845, Japan
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20
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Grenz PJ, Thonig D, Holtmann M, Miyamoto K, Kumar S, Schwier E, Okuda T, Henk J, Donath M. Adlayer influence on Dirac-type surface state at W(110). J Phys Condens Matter 2021; 33:285504. [PMID: 33946058 DOI: 10.1088/1361-648x/abfdf3] [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] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
In a combined experimental and theoretical study, we investigated how Fe and Co adlayers on W(110) affect the Dirac-type surface state (DSS). Angle-resolved photoelectron spectroscopy data show an increase in binding energy of 75 meV and 107 meV for Fe and Co, respectively. In order to identify the origin of the energy shift we performed first-principles calculations of the surface electronic structure. The inward surface relaxation of the uncovered W(110) surface is lifted by the adlayers. This structural change is one reason of the energy shift of the DSS. Furthermore, the Fe and Co adlayers change the surface potential, which results in an additional energy shift of the DSS.
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Affiliation(s)
- P J Grenz
- Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - D Thonig
- Department of Physics and Astronomy, Material Theory, University Uppsala, Box 516, 75120 Uppsala, Sweden
- School of Science and Technology, Örebro University, 701 82 Örebro, Sweden
| | - M Holtmann
- Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - S Kumar
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - E Schwier
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - T Okuda
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - J Henk
- Institute of Physics, Martin Luther University Halle-Wittenberg, 06099 Halle, Saale, Germany
| | - M Donath
- Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
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21
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Takahashi Y, Hiratsuka S, Machida N, Takahashi D, Matsushita J, Hozak P, Misteli T, Miyamoto K, Harata M. Impairment of nuclear F-actin formation and its relevance to cellular phenotypes in Hutchinson-Gilford progeria syndrome. Nucleus 2021; 11:250-263. [PMID: 32954953 PMCID: PMC7529414 DOI: 10.1080/19491034.2020.1815395] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a premature aging disorder caused by a mutation of lamin A, which contributes to nuclear architecture and the spatial organization of chromatin in the nucleus. The expression of a lamin A mutant, named progerin, leads to functional and structural disruption of nuclear organization. Since progerin lacks a part of the actin-binding site of lamin A, we hypothesized that nuclear actin dynamics and function are altered in HGPS cells. Nuclear F-actin is required for the organization of nuclear shape, transcriptional regulation, DNA damage repair, and activation of Wnt/β-catenin signaling. Here we show that the expression of progerin decreases nuclear F-actin and impairs F-actin-regulated transcription. When nuclear F-actin levels are increased by overexpression of nuclear-targeted actin or by using jasplakinolide, a compound that stabilizes F-actin, the irregularity of nuclear shape and defects in gene expression can be reversed. These observations provide evidence for a novel relationship between nuclear actin and the etiology of HGPS.
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Affiliation(s)
- Yuto Takahashi
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Shogo Hiratsuka
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Nanako Machida
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Daisuke Takahashi
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Junpei Matsushita
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Pavel Hozak
- Institute of Molecular Genetics of the Czech Academy of Sciences , Prague, Czech Republic
| | - Tom Misteli
- National Cancer Institute, National Institutes of Health , Bethesda, MD, USA
| | - Kei Miyamoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University , Wakayama, Japan
| | - Masahiko Harata
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
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22
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Maki R, Nozawa S, Fushimi K, Iwai C, Miyamoto K, Akiyama H. Iatrogenic lumbar scoliosis aggravated by hardware irritation in the iliac bone after pedicle screw fixation: Case report. Interdisciplinary Neurosurgery 2021. [DOI: 10.1016/j.inat.2020.101040] [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: 11/28/2022] Open
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23
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Dai J, Frantzeskakis E, Aryal N, Chen KW, Fortuna F, Rault JE, Le Fèvre P, Balicas L, Miyamoto K, Okuda T, Manousakis E, Baumbach RE, Santander-Syro AF. Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals. Phys Rev Lett 2021; 126:196407. [PMID: 34047592 DOI: 10.1103/physrevlett.126.196407] [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] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 03/08/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
We report the observation of a nontrivial spin texture in Dirac node arcs, i.e., novel topological objects formed when Dirac cones of massless particles extend along an open one-dimensional line in momentum space. We find that such states are present in all the compounds of the tetradymite M_{2}Te_{2}X family (M=Ti, Zr, or Hf and X=P or As) regardless of the weak or strong character of the topological invariant. The Dirac node arcs in tetradymites are thus the simplest possible textbook example of a type-I Dirac system with a single spin-polarized node arc.
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Affiliation(s)
- J Dai
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - E Frantzeskakis
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - N Aryal
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - K-W Chen
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - F Fortuna
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - J E Rault
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP48, 91192 Gif-sur-Yvette, France
| | - P Le Fèvre
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP48, 91192 Gif-sur-Yvette, France
| | - L Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - K Miyamoto
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - T Okuda
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - E Manousakis
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, National and Kapodistrian University of Athens, Panepistimioupolis, Zografos, 157 84 Athens, Greece
| | - R E Baumbach
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - A F Santander-Syro
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
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24
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Morita K, Hatanaka Y, Ihashi S, Asano M, Miyamoto K, Matsumoto K. Symmetrically dimethylated histone H3R2 promotes global transcription during minor zygotic genome activation in mouse pronuclei. Sci Rep 2021; 11:10146. [PMID: 33980975 PMCID: PMC8115239 DOI: 10.1038/s41598-021-89334-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 04/23/2021] [Indexed: 11/09/2022] Open
Abstract
Paternal genome reprogramming, such as protamine–histone exchange and global DNA demethylation, is crucial for the development of fertilised embryos. Previously, our study showed that one of histone arginine methylation, asymmetrically dimethylated histone H3R17 (H3R17me2a), is necessary for epigenetic reprogramming in the mouse paternal genome. However, roles of histone arginine methylation in reprogramming after fertilisation are still poorly understood. Here, we report that H3R2me2s promotes global transcription at the 1-cell stage, referred to as minor zygotic genome activation (ZGA). The inhibition of H3R2me2s by expressing a histone H3.3 mutant H3.3R2A prevented embryonic development from the 2-cell to 4-cell stages and significantly reduced global RNA synthesis and RNA polymerase II (Pol II) activity. Consistent with this result, the expression levels of MuERV-L as minor ZGA transcripts were decreased by forced expression of H3.3R2A. Furthermore, treatment with an inhibitor and co-injection of siRNA to PRMT5 and PRMT7 also resulted in the attenuation of transcriptional activities with reduction of H3R2me2s in the pronuclei of zygotes. Interestingly, impairment of H3K4 methylation by expression of H3.3K4M resulted in a decrease of H3R2me2s in male pronuclei. Our findings suggest that H3R2me2s together with H3K4 methylation is involved in global transcription during minor ZGA in mice.
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Affiliation(s)
- Kohtaro Morita
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan. .,Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Yuki Hatanaka
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Medical Research Council (MRC) London Institute of Clinical Sciences, Imperial College London, London, UK
| | - Shunya Ihashi
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Masahide Asano
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kei Miyamoto
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Kazuya Matsumoto
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
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25
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Kamimura S, Inoue K, Mizutani E, Kim JM, Inoue H, Ogonuki N, Miyamoto K, Ihashi S, Itami N, Wakayama T, Ito A, Nishino N, Yoshida M, Ogura A. Improved development of mouse somatic cell nuclear transfer embryos by chlamydocin analogues, class I and IIa histone deacetylase inhibitors†. Biol Reprod 2021; 105:543-553. [PMID: 33982061 PMCID: PMC8335354 DOI: 10.1093/biolre/ioab096] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 03/29/2021] [Accepted: 05/07/2021] [Indexed: 12/13/2022] Open
Abstract
In mammalian cloning by somatic cell nuclear transfer (SCNT), the treatment of reconstructed embryos with histone deacetylase (HDAC) inhibitors improves efficiency. So far, most of those used for SCNT are hydroxamic acid derivatives-such as trichostatin A-characterized by their broad inhibitory spectrum. Here, we examined whether mouse SCNT efficiency could be improved using chlamydocin analogues, a family of newly designed agents that specifically inhibit class I and IIa HDACs. Development of SCNT-derived embryos in vitro and in vivo revealed that four out of five chlamydocin analogues tested could promote the development of cloned embryos. The highest pup rates (7.1-7.2%) were obtained with Ky-9, similar to those achieved with trichostatin A (7.2-7.3%). Thus, inhibition of class I and/or IIa HDACs in SCNT-derived embryos is enough for significant improvements in full-term development. In mouse SCNT, the exposure of reconstructed oocytes to HDAC inhibitors is limited to 8-10 h because longer inhibition with class I inhibitors causes a two-cell developmental block. Therefore, we used Ky-29, with higher selectivity for class IIa than class I HDACs for longer treatment of SCNT-derived embryos. As expected, 24-h treatment with Ky-29 up to the two-cell stage did not induce a developmental block, but the pup rate was not improved. This suggests that the one-cell stage is a critical period for improving SCNT cloning using HDAC inhibitors. Thus, chlamydocin analogues appear promising for understanding and improving the epigenetic status of mammalian SCNT-derived embryos through their specific inhibitory effects on HDACs.
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Affiliation(s)
- Satoshi Kamimura
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan.,Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Kimiko Inoue
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Eiji Mizutani
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan.,Laboratory of Stem Cell Therapy, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan.,Division of Stem Cell Therapy, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Jin-Moon Kim
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Hiroki Inoue
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Narumi Ogonuki
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Kei Miyamoto
- Faculty of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama-ken, Japan
| | - Shunya Ihashi
- Faculty of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama-ken, Japan
| | - Nobuhiko Itami
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Teruhiko Wakayama
- Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan
| | - Akihiro Ito
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan.,RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Norikazu Nishino
- RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan.,Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Japan
| | - Minoru Yoshida
- RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan.,Department of Biotechnology, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Atsuo Ogura
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.,RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
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26
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Shimokawa T, Miyamoto K, Hioki A, Masuda T, Fushimi K, Ogawa H, Ohnishi K, Akiyama H. Compensatory Pelvic Retro-Rotation Associated with a Decreased Quality of Life in Patients with Normal Sagittal Balance. Asian Spine J 2021; 16:241-247. [PMID: 33966366 PMCID: PMC9066255 DOI: 10.31616/asj.2020.0449] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/05/2020] [Indexed: 11/28/2022] Open
Abstract
Study Design Cross-sectional observational study. Purpose To examine whether pelvic rotation as a compensatory mechanism for sagittal imbalance is related to quality of life (QOL). Overview of Literature Poor sagittal alignment is associated with compensatory pelvic retroversion and decreased QOL. Whether the compensatory pelvic tilt (PT) influences QOL is unclear. Methods Overall, 134 subjects aged ≥20 years with lower back pain were included (104 females; mean age, 70±9.8 years). Sagittal vertical alignment (SVA) and PT were analyzed radiographically. Patients were stratified into three groups based on SVA values: good alignment (group G), intermediate alignment (group I), and poor sagittal alignment (group P). Patients in group I were further categorized into two groups: low PT and high PT. The Japanese Orthopaedic Association Back Pain Evaluation Questionnaire (JOABPEQ) was used for clinical assessment, and the scores were compared between groups. Results As SVA increased, PT and lumbar lordosis (LL) increased and decreased, respectively. PT and LL differed significantly between groups G and P (p<0.01 for each comparison). Within group I, there was no significant difference in SVA between the high PT and low PT groups, suggesting that the high PT group had acquired a compensated sagittal balance. Importantly, all domains in the JOABPEQ (except for lower back pain) were significantly lower in the high PT group than in the low PT group (p<0.05 for every comparison). Conclusions This study showed that focusing solely on SVA as a single indicator can cause important losses in QOL to be overlooked in patients with lumbar disorders. Although pelvic retroversion can compensate for sagittal balance, it is associated with a significant decrease in QOL. To improve the assessment of patients with lumbar disorders, PT should be considered besides SVA.
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Affiliation(s)
- Tetsuya Shimokawa
- Department of Orthopaedic Surgery, Ogaki Tokushukai Hospital, Gifu, Japan.,Department of Orthopaedic Surgery, School of Medicine, Gifu University, Gifu, Japan
| | - Kei Miyamoto
- Department of Orthopaedic Surgery, Gifu Municipal Hospital, Gifu, Japan
| | - Akira Hioki
- Spine Center, Matsunami General Hospital, Gifu, Japan
| | | | - Kazunari Fushimi
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, Gifu, Japan
| | - Hiroyasu Ogawa
- Department of Orthopaedic Surgery, Ogaki Tokushukai Hospital, Gifu, Japan
| | - Kazuichiro Ohnishi
- Department of Orthopaedic Surgery, Ogaki Tokushukai Hospital, Gifu, Japan
| | - Haruhiko Akiyama
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, Gifu, Japan
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27
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Tomita T, Toda M, Murakumo K, Miyamoto K, Matsumoto R, Ueda K, Sato K. Volume of the whale shark and their mechanism of vertical feeding. ZOOLOGY 2021; 147:125932. [PMID: 34130224 DOI: 10.1016/j.zool.2021.125932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 11/25/2022]
Abstract
The present study provides a noninvasive method to estimate the body volume of sharks (Elasmobranchii, Selachii) using a computational geometric model. This method allows the volume of sharks to be estimated from lateral and ventral photographs assuming an elliptical body cross-sectional geometry. A comparison of the estimated and actual body volumes of several shark species showed that the estimation error was < 0.5%. The accuracy of the model decreased if photographs that were inclined to the orthogonal plane were used, although this error was on average < 2.3% if the inclination angle was 10° or less. Applying this model to captive whale sharks (Rhincodon typus) that were 8.0 and 8.8 m in total length revealed that their body volumes were 3.5 and 4.5 m3, respectively. These estimates allowed for the quantitative evaluation of our hypothesis, that the whale shark uses suctioned air for buoyancy control during vertical feeding-a behavior unique to this species among elasmobranchs. The volume estimates of the captive whale sharks, together with the density estimates from their liver proportions, revealed that the air occupying a part of oro-pharyngeal and branchial cavities can help the whale sharks to keep their body floating. This hypothesis may explain how the whale shark sometimes stays at the water surface without fin motion during vertical feeding, even though their body density is greater than that of seawater.
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Affiliation(s)
- Taketeru Tomita
- Okinawa Churashima Research Center, Okinawa Churashima Foundation, 888, Motobu-cho, Okinawa, 905-0206, Japan; Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan.
| | - Minoru Toda
- Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan
| | - Kiyomi Murakumo
- Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan
| | - Kei Miyamoto
- Okinawa Churashima Research Center, Okinawa Churashima Foundation, 888, Motobu-cho, Okinawa, 905-0206, Japan; Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan
| | - Rui Matsumoto
- Okinawa Churashima Research Center, Okinawa Churashima Foundation, 888, Motobu-cho, Okinawa, 905-0206, Japan; Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan
| | - Keiichi Ueda
- Okinawa Churashima Research Center, Okinawa Churashima Foundation, 888, Motobu-cho, Okinawa, 905-0206, Japan; Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan
| | - Keiichi Sato
- Okinawa Churashima Research Center, Okinawa Churashima Foundation, 888, Motobu-cho, Okinawa, 905-0206, Japan; Okinawa Churaumi Aquarium, 424, Motobu-cho, Okinawa, 905-0206, Japan
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28
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Okuno T, Li WY, Hatano Y, Takasu A, Sakamoto Y, Yamamoto M, Ikeda Z, Shindo T, Plessner M, Morita K, Matsumoto K, Yamagata K, Grosse R, Miyamoto K. Zygotic Nuclear F-Actin Safeguards Embryonic Development. Cell Rep 2021; 31:107824. [PMID: 32610125 DOI: 10.1016/j.celrep.2020.107824] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 02/27/2020] [Accepted: 06/04/2020] [Indexed: 12/20/2022] Open
Abstract
After fertilization, sperm and oocyte nuclei are rapidly remodeled to form swollen pronuclei (PN) in mammalian zygotes, and the proper formation and function of PN are key to producing totipotent zygotes. However, how mature PN are formed has been unclear. We find that filamentous actin (F-actin) assembles in the PN of mouse zygotes and is required for fully functional PN. The perturbation of nuclear actin dynamics in zygotes results in the misregulation of genes related to genome integrity and abnormal development of mouse embryos. We show that nuclear F-actin ensures DNA damage repair, thus preventing the activation of a zygotic checkpoint. Furthermore, optogenetic control of cofilin nuclear localization reveals the dynamically regulated F-actin nucleoskeleton in zygotes, and its timely disassembly is needed for developmental progression. Nuclear F-actin is a hallmark of totipotent zygotic PN, and the temporal regulation of its polymerized state is necessary for normal embryonic development.
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Affiliation(s)
- Tomomi Okuno
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Wayne Yang Li
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Yu Hatano
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Atsushi Takasu
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Yuko Sakamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Mari Yamamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Zenki Ikeda
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Taiki Shindo
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Matthias Plessner
- Institute of Experimental and Clinical Pharmacology and Toxicology, Albert-Ludwigs-University Freiburg, Albertstrasse 25, 79104 Freiburg, Germany
| | - Kohtaro Morita
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Kazuya Matsumoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Kazuo Yamagata
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Robert Grosse
- Institute of Experimental and Clinical Pharmacology and Toxicology, Albert-Ludwigs-University Freiburg, Albertstrasse 25, 79104 Freiburg, Germany; CIBSS-Centre for Integrative Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestr. 18, 79104 Freiburg, Germany
| | - Kei Miyamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama 649-6493, Japan.
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29
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Tonegawa R, Miyamoto K, Ueda N, Nakajima K, Wada M, Yamagata K, Ishibashi K, Inoue Y, Noda T, Nagase S, Ota M, Aiba T, Nakajima T, Fukuda T, Kusano K. Ventricular tachycardia in cardiac sarcoidosis -prognosis, characterization of ventricular substrates and outcomes of treatment-. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2141] [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: 11/13/2022] Open
Abstract
Abstract
Background
The prognosis, the underlying substrate and clinical outcomes of treatment are unclear in patients with cardiac sarcoidosis (CS)-related ventricular tachycardia (VT).
Objective
This study investigated the prognosis and the relationship between electroanatomical mapping (EAM) and imaging findings in patients with CS-related VT.
Methods
A total of 203 CS patients (Age 68.1±11.6 years, 87 males) were enrolled at two tertiary care medical centers between 2000 and 2018. All met the 2016 Japanese Circulation Society guidelines for diagnosis of CS. They were followed for a composite of major adverse cardiac events (MACE) including cardiac death, heart transplantation, unscheduled hospitalization for heart failure, and life-threatening ventricular arrhythmias. Distribution of late gadolinium enhancement (LGE) on cardiac MRI (CMR) and/or an abnormal myocardial 18F-fluorodeoxyglucose (FDG) uptake on positron emission tomography at diagnosis were examined. The relationship between EAM and the image findings were also analyzed in patients with radiofrequency ablation (RFA) for VT.
Results
During a median follow-up of 53 months, 87 of the 203 patients (43%) experienced a MACE. Baseline factors associated with MACE were presence of sustained VT (HR, 2.43, 95% CI 1.54–3.85, P<0.001), left ventricular ejection fraction below 50% (HR, 1.95 95% CI 1.07–3.56, P=0.029), and abnormal myocardial FDG uptake (HR, 2.42 95% CI 1.04–5.61, P=0.039). Overall, 69 of the 203 patients (34%) experienced sustained VT. Abnormal myocardial FDG uptake was significantly more prevalent in patients with VT than in those without (92.7% vs. 78.5%, P=0.02). A total of 25 patients (9.9%) required RFA for CS-related VT (Age 64.0±8.7 years, 12 males, 1.32±0.56 RFAs per patient). Abnormal electrocardiograms (EGM) were observed in 22 of the 25 patients (88%). LGE was more frequent than abnormal FDG uptake in areas with an abnormal EGM (77% vs. 41%; P=0.002). Over a mean follow-up period of 67-months, 13 of the 25 patients with RFA (52%) remained free of VT episodes (Figure). VT recurred in nine of the 12 patients with RFA and in 17 of the 47 patients without RFA, but was suppressed by intensive pharmacologic therapy such as the combined use of amiodarone and sotalol. In patients with CS-related VT, survival without experiencing a MACE did not differ in participants with or without RFA.
Conclusions
In our 203 CS patients, sustained VT and abnormal FDG uptake were associated with worse cardiac outcomes. The prevalence of abnormal FDG uptake was significantly higher in patients with CS-related VT, LGE on CMR was more frequent within localized areas of an abnormal EGM, suggesting that both scar itself and the associated inflammation were involved in the pathogenesis of CS-related VT. Successful RFA of CS-related VT is still challenging, and recurrence is common. Preprocedural CMR can be useful in detecting abnormal EGMs that are potential targets for substrate ablation.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- R Tonegawa
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Kumamoto University, Department of Advanced Cardiovascular Medicine, Kumamoto, Japan
| | - K Miyamoto
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - N Ueda
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - M Ota
- National Cerebral & Cardiovascular Center, Department of Radiology, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - T Nakajima
- Saitama Cardiovascular and Respiratory Center, Department of Cardiology, Kumagaya, Japan
| | - T Fukuda
- National Cerebral & Cardiovascular Center, Department of Radiology, Suita, Japan
| | - K.F Kusano
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Kumamoto University, Department of Advanced Cardiovascular Medicine, Kumamoto, Japan
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30
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Kamada H, Ishibashi K, Nakajima K, Ueda N, Kamakura T, Wada M, Yamagata K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Isobe M, Terasaki F, Kusano K. Cardiac function at diagnosis is important prognostic factor in patients with cardiac sarcoidosis -from Japanese nationwide questionnaire survey-. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2130] [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
Sarcoidosis is a systemic non-caseating granulomatous disease of unknown etiology. Cardiac involvement (cardiac sarcoidosis, CS) has been reported to be an important prognostic factor in this disease because of heart failure and/or ventricular arrhythmia, and corticosteroid therapy is usually prescribed to prevent cardiac events. However, little is known about the relationship of cardiac function and concomitant corticosteroid therapy on later cardiac events in CS.
Objective
We evaluated the relationship between prognosis and left ventricular ejection fraction (LVEF) at the time of diagnosis in CS patients from the Japanese nationwide questionnaire survey.
Methods
Total of 757 Japanese patients from 57 hospitals who diagnosed CS were examined. Patients who unsatisfied the criteria of the Japanese new guidelines, or who underwent cardiac transplantations were excluded, and 420 patients (287 females, mean age 60±13 years old, median follow-up periods 1864 days [interquartile range: 845–3159 days]) were analyzed. The relationship of adverse events (all-cause death, cardiovascular death, and appropriate ICD [Implantable Cardioverter Defibrillator] discharge) and LVEF (with corticosteroid 84%) (low LVEF: LVEF≤35% n=98 [with corticosteroid in 78%], moderate LVEF: LVEF 35–50% n=104 [with corticosteroid in 93%], normal LVEF: 50≤LVEF n=218 [with corticosteroid in 83%]) were evaluated respectively.
Results
89 CS patients developed all-cause death (n=50), cardiovascular death (n=30) or appropriate ICD discharge (n=48). The frequency of corticosteroid therapy was not different in the each LVEF group, but Kaplan-Meier analysis revealed that all-cause death, cardiovascular death, and all cardiovascular adverse events were more observed in lower LVEF group (log-rank p<0.0001). Furthermore, multivariate Cox hazard analysis revealed that LVEF was a most important independent prognostic factor in CS.
Conclusion
This Japanese nationwide questionnaire survey data showed that initial LVEF was an independent and strong prognostic predictor in CS, therefore primary prevention would be needed even after starting corticosteroid in patients with decreased cardiac function.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- H Kamada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - N Ueda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Kamakura
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Miyamoto
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Isobe
- Tokyo Medical and Dental University, Tokyo, Japan
| | | | - K Kusano
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
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Kamada H, Ishibashi K, Nakajima K, Ueda N, Kamakura T, Wada M, Yamagata K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Isobe M, Terasaki F, Kusano K. Long time clinical course of cardiac sarcoidosis with corticosteroid therapy -from Japanese nationwide questionnaire survey-. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2109] [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
Sarcoidosis is a systemic inflammatory syndrome of unknown etiology and cardiac involvement has been reported to be an important prognostic factor in this disease. An autopsy study has reported that the frequency of this cardiac involvement (cardiac sarcoidosis: CS) varies in the different countries and races and very frequent in Japanese patients. We therefore performed the nationwide questionnaire survey and try to clarify the clinical characteristics and corticosteroid effect in CS, especially focused on arrhythmic events in this disease.
Methods
Total of 757 Japanese patients from 57 hospitals who diagnosed CS were examined. Patients who unsatisfied the criteria of the Japanese new guidelines, or who underwent cardiac transplantations were excluded, and 420 patients (287 females, median follow-up periods 1864 days [interquartile range: 845–3159 days]) were analyzed. The clinical outcome and corticosteroid effect were evaluated.
Results
Clinical characteristics at diagnosis was as follows: female dominant (68%), mean age of 60±13 years old, mean left ventricular ejection fraction was 49±16%. Arrhythmic events were very frequently observed as an initial cardiac manifestation in 263 patients (62%) of CS, of which atrioventricular block (AVB) in 174 (41%), ventricular tachycardia (VT) in 73 (17%) and AVB with VT in 17 (4%) (Figure 1A). Pacemaker was implanted in 166 patients (40%) and defibrillators was 137 patients (33%). Corticosteroid was prescribed in 144 (83%) of 174 patients with AVB and in 62 (85%) of 73 patients with VT. Initial dose was mean 47.9 mg and maintenance dose of mean 7.3 mg. Corticosteroid improved VT as good as AVB (27% vs. 29%). However, corticosteroid sometimes worsened VT events compared with AVB (10% vs. 2%) (Figure 1B). During the course of follow-up, 32 patients were needed to increase corticosteroid in 23 of AVB and 10 of VT cases. However, there were no difference in mortality between the groups, whether or not to increase corticosteroid. All survival rate was 92% (5-year mortality), 83% (10-year mortality) and free from all cause death and defibrillator charge was 81% (5 year), 71% (10 year).
Conclusion
Fatal arrhythmia is commonly observed in CS as a primary symptom. Corticosteroid sometimes worsen ventricular arrhythmia and appropriate defibrillator discharge was common. Thus, careful attention for activating ventricular arrhythmia would be needed during the follow-up period even after corticosteroid therapy.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- H Kamada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - N Ueda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Kamakura
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Miyamoto
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Isobe
- Tokyo Medical and Dental University, Tokyo, Japan
| | | | - K Kusano
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
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32
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Kamada H, Ishibashi K, Nakajima K, Ueda N, Kamakura T, Wada M, Yamagata K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Isobe M, Terasaki F, Kusano K. Long-term follow up ventricular tachycardia patients with preserved cardiac function -from Japanese cardiac sarcoidosis nationwide questionnaire survey-. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2128] [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
Prior ventricular tachycardia (VT) and low left ventricular ejection fraction (LVEF) are the most important prognostic factors in cardiac sarcoidosis (CS). Recently diagnosis of CS was renewed according to Japanese new guidelines. Patients with preserved cardiac function often have VT events, thus new guidelines recommends to assess the implantable cardioverter defibrillator (ICD) implantation for CS patients with preserved LVEF (35%≤LVEF<50%). However, the long-term prognosis of CS patients with preserved LVEF is unclear.
Objective
In CS patients with preserved LVEF, we evaluated the prognosis between VT manifestation and non-VT manifestation groups at CS diagnosis from Japanese nationwide questionnaire survey.
Methods
Total of 757 Japanese patients from 57 hospitals who diagnosed CS were examined. Patients who unsatisfied the criteria of the Japanese new guidelines, who had LVEF≤35%, LVEF>50%, or who underwent cardiac transplantations were excluded. 104 patients with LVEF 35–50% (67 females, mean age 60±15 years old, median follow-up periods 2134 days [interquartile range: 758–2935 days]) were analyzed. The prognosis between VT manifestation and non-VT manifestation groups at CS diagnosis were evaluated.
Results
30 patients had VT manifestation at CS diagnosis and 24 patients (80%) received ICDs. 74 patients had no VT manifestation at CS diagnosis and 19 patients (44%) received ICDs during follow up period. All-cause mortality was not different between two groups (Figure). Appropriate ICD therapy of non-VT manifestation group was significantly lower compared with that of VT manifestation group (log-rank p=0.001), however considerable number (n=7, 15%) of non-VT manifestation group had appropriate ICD therapy event during follow-up period. Cox hazard analysis revealed that concomitant non-sustained VT (NSVT) with atrioventricular block (AVB) was a predictor of appropriate ICD therapy in non-VT manifestation group.
Conclusion
This nationwide survey showed that considerable number of CS patients with preserved LVEF had VT events, independent of VT manifestation. Concomitant NSVT with AVB was a predictor of VT events, and ICD implantation should be assessed.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- H Kamada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - N Ueda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Kamakura
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Miyamoto
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Isobe
- Tokyo Medical and Dental University, Tokyo, Japan
| | | | - K Kusano
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
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Tonegawa R, Miyamoto K, Ueda N, Nakajima K, Kamakura T, Yamagata K, Wada M, Ishibashi K, Inoue Y, Noda T, Nagase S, Aiba T, Kusano K. Micro-embolic risks during radiofrequency and cryoballoon-ablation of atrial fibrillation -analysis from real-time carotid artery doppler monitoring-. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0486] [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
Catheter ablation of atrial fibrillation (AF) is associated with risks of silent cerebral events. However, the timing of intraprocedural micro-embolic events or differences between open-irrigated radiofrequency (RF) and cryoballoon (Cryo) ablation are unclear. Newly developed real-time carotid artery Doppler is a simple non-invasive method to detect micro-embolic signals (MESs) during ablation.
Objective
We investigated the timing of detecting MESs during RF and Cryo ablation of AF.
Methods
During the first pulmonary vein isolation (PVI) session of AF, MESs were monitored by real-time carotid artery Doppler monitoring throughout the procedure. The MES counts were collected and evaluated separately during the different steps of the procedure (Figure).
Results
Thirty-three AF patients (RF/Cryo: 22/11 cases, 9 females, 69.5±11.6 y.o) were included. PVI was successfully accomplished in all patients with no major complications. The MES count was significantly greater in the RF group than Cryo group (table). In both groups, left atrial (LA) access (interatrial puncture) and sheaths insertion to the LA generated a significant number of MESs (RF: 1690 of 9116 MESs [18.5% of the total MESs], Cryo: 793 of 2285 MESs [34.7%]). In the RF group, MESs were observed incessantly during PVI (Figure). The LA dwell time was significantly longer in the RF group than Cryo group (table). In the RF group, the MES count was significantly greater in the longer LA dwell time group (LA dwell time >130min) than the shorter group (464.2±179.7 vs 302.6±138.2: P=0.049). During the cryo-applications in the Cryo group, the MESs were greatest during the first cryoballoon application (625 of 2285 MESs [27.4%]).
Conclusions
There were more MESs during RF ablation than cryoablation. MESs were recorded during a variety of steps throughout the procedure. In the RF group, most of MESs were recorded incessantly during radiofrequency ablation and greater number of MESs were recorded in patients with longer LA dwell time. In the Cryo group, most of MESs occurred during phases with a high probability of gaseous emboli.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- R Tonegawa
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Kumamoto University, Department of Advanced Cardiovascular Medicine, Kumamoto, Japan
| | - K Miyamoto
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - N Ueda
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - T Kamakura
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Division of arrhythmia, Department of Cardiovascular Medicine, Suita, Japan
| | - K.F Kusano
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Kumamoto University, Department of Advanced Cardiovascular Medicine, Kumamoto, Japan
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Yokoyama Y, Miyamoto K, Nakai M, Sumita Y, Ueda N, Nakajima K, Kamakura T, Wada M, Yamagata K, Ishibashi K, Inoue Y, Nagase S, Noda T, Aiba T, Kusano K. The safety of catheter ablation of atrial fibrillation in elderly patients -analysis of the nationwide database in Japan, JROAD-DPC-. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0613] [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
“Age” is one of the major concerns and determinants of the indications for catheter ablation (CA) of atrial fibrillation (AF). There are little safety data on CA of AF according to the age. This study aimed to assess the safety of CA in elderly patients undergoing CA of AF.
Methods and results
We investigated the complication rate of CA of AF for the different age groups (<60 years, 60–65, 65–70, 70–75, 75–80, 80–85, and ≥85) by a nationwide database (Japanese Registry Of All cardiac and vascular Diseases [JROAD]-DPC). The JROAD-DPC included 73,296 patients (65±11 years, 52,883 men) who underwent CA of AF from 516 hospitals in Japan. Aged patients had more comorbidities and a significantly increased CHADS2 score and higher rate of female according to a higher age. The overall complication rate was 2.6% and in-hospital mortality was 0.05%. By comparing each age group, complications occurred more frequently in higher aged groups. A multivariate adjusted hazard ratio revealed an increased age was independently and significantly associated with the overall complications (odds ratio was 1.25, 1.35, 1.72, 1.86, 2.76 and 3.13 respectively; reference <60 years).
Conclusions
The frequency of complications was significantly higher according to a higher age. We should take note of the indications and procedure for CA of AF in aged patients.
Funding Acknowledgement
Type of funding source: Public Institution(s). Main funding source(s): Intramural Research Fund 17 (Kusano) for Cardiovascular Diseases of the National Cerebral and Cardiovascular Center
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Affiliation(s)
- Y Yokoyama
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Miyamoto
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Nakai
- National Cerebral and Cardiovascular Center Hospital, Center for Cerebral and Cardiovascular Disease Information, Osaka, Japan
| | - Y Sumita
- National Cerebral and Cardiovascular Center Hospital, Center for Cerebral and Cardiovascular Disease Information, Osaka, Japan
| | - N Ueda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Kamakura
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Aiba
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Kusano
- National Cerebral & Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
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Yoda T, Saengrut B, Rattanasathien R, Ishimoto Y, Saito T, Miyamoto K, Chunjai K, Pudwan R, Sirimuengmoon K, Katsuyama H. Differences in body composition and grip between Japanese and Thai older people living in Thailand. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.1099] [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: 11/13/2022] Open
Abstract
Abstract
Background
Age-related muscle mass loss is one of the main risk factors for osteoporosis and fractures among older people. Thus, prevention of muscle mass loss in older people is an important issue. We examined ethnic group-related differences in body composition and grip strength among older people living in the same area.
Methods
We measured body composition and grip strength among local Thai older people living in Chiang Mai Province, as well as in Japanese older people who emigrated to Chiang Mai Province in their retirement. A self-reported questionnaire regarding socio-demographic status was also administered. Measurement items were averaged and compared by sex and ethnic group. Questionnaire items were also categorized by sex and ethnic group.
Results
A total of 119 older people participated, including 47 Japanese participants (26 men, 21 women) and 72 Thai participants (16 men, 56 women). The average age of Japanese participants was 71.1 years (standard deviation: 4.89), and the average age of Thai participants was 68.8 years (standard deviation: 5.61). Significant differences between ethnic groups were found in percentage of body fat in women (Japanese average: 32.9% vs. Thai average: 37.6%, p < 0.05), skeletal muscle mass index (SMI) in men (Japanese average: 7.85 kg/m2 vs. Thai average: 7.31 kg/m2, p < 0.05) and average grip strength in men (Japanese: 35.1 kg vs. Thai: 30.7 kg, p < 0.05).
Conclusions
Our preliminary results suggest that Thai older people, particularly men, are weaker than Japanese older people. Decreased muscle mass is directly responsible for functional impairment, involving loss of strength, increased likelihood of falls, and loss of autonomy. Preventing muscle weakness among older people is important. In future studies, we plan to analyze and clarify the differences between Thai and Japanese older people to identify effective methods to prevent muscle mass decreases.
Key messages
There were significant differences in average % body fat between older Japanese and Thai women. There were significant differences in average SMI and grip strength between older Japanese and Thai men.
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Affiliation(s)
- T Yoda
- Department of Health and Sports Science, Kawasaki University of Medical Welfare, Kurashiki, Japan
- Department of Public Health, Kawasaki Medical School, Kurashiki, Japan
| | - B Saengrut
- Nursing Department, Faculty of Medicine, Chiang Mai Univeristy, Chiang Mai, Thailand
| | - R Rattanasathien
- Nursing Department, Faculty of Medicine, Chiang Mai Univeristy, Chiang Mai, Thailand
| | - Y Ishimoto
- Department of Health and Sports Science, Kawasaki University of Medical Welfare, Kurashiki, Japan
| | - T Saito
- Department of Sports Science, Japan Institute of Sports Science, Tokyo, Japan
| | - K Miyamoto
- Faculty of Education, Kagawa University, Takamatsu, Japan
| | - K Chunjai
- Nursing Department, Faculty of Medicine, Chiang Mai Univeristy, Chiang Mai, Thailand
| | - R Pudwan
- Nursing Department, Faculty of Medicine, Chiang Mai Univeristy, Chiang Mai, Thailand
| | - K Sirimuengmoon
- Faculty of Associated Medical Science, Chiang Mai University, Chiang Mai, Thailand
| | - H Katsuyama
- Department of Public Health, Kawasaki Medical School, Kurashiki, Japan
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Shikin AM, Estyunin DA, Klimovskikh II, Filnov SO, Schwier EF, Kumar S, Miyamoto K, Okuda T, Kimura A, Kuroda K, Yaji K, Shin S, Takeda Y, Saitoh Y, Aliev ZS, Mamedov NT, Amiraslanov IR, Babanly MB, Otrokov MM, Eremeev SV, Chulkov EV. Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator [Formula: see text]. Sci Rep 2020; 10:13226. [PMID: 32764583 PMCID: PMC7413556 DOI: 10.1038/s41598-020-70089-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 07/22/2020] [Indexed: 11/09/2022] Open
Abstract
Modification of the gap at the Dirac point (DP) in axion antiferromagnetic topological insulator [Formula: see text] and its electronic and spin structure have been studied by angle- and spin-resolved photoemission spectroscopy (ARPES) under laser excitation at various temperatures (9-35 K), light polarizations and photon energies. We have distinguished both large (60-70 meV) and reduced ([Formula: see text]) gaps at the DP in the ARPES dispersions, which remain open above the Neél temperature ([Formula: see text]). We propose that the gap above [Formula: see text] remains open due to a short-range magnetic field generated by chiral spin fluctuations. Spin-resolved ARPES, XMCD and circular dichroism ARPES measurements show a surface ferromagnetic ordering for the "large gap" sample and apparently significantly reduced effective magnetic moment for the "reduced gap" sample. These observations can be explained by a shift of the Dirac cone (DC) state localization towards the second Mn layer due to structural disturbance and surface relaxation effects, where DC state is influenced by compensated opposite magnetic moments. As we have shown by means of ab-initio calculations surface structural modification can result in a significant modulation of the DP gap.
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Affiliation(s)
- A. M. Shikin
- Saint Petersburg State University, 198504 Saint Petersburg, Russia
| | - D. A. Estyunin
- Saint Petersburg State University, 198504 Saint Petersburg, Russia
| | | | - S. O. Filnov
- Saint Petersburg State University, 198504 Saint Petersburg, Russia
| | - E. F. Schwier
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima, Japan
| | - S. Kumar
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima, Japan
| | - K. Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima, Japan
| | - T. Okuda
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima, Japan
| | - A. Kimura
- Department of Physical Sciences, Graduate School of Science, Hiroshima University, Hiroshima, Japan
| | - K. Kuroda
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581 Japan
| | - K. Yaji
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581 Japan
| | - S. Shin
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581 Japan
| | - Y. Takeda
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148 Japan
| | - Y. Saitoh
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148 Japan
| | - Z. S. Aliev
- Azerbaijan State Oil and Industry University, AZ1010 Baku, Azerbaijan
- Institute of Physics, ANAS, AZ1143 Baku, Azerbaijan
| | | | - I. R. Amiraslanov
- Institute of Physics, ANAS, AZ1143 Baku, Azerbaijan
- Baku State University, AZ1148 Baku, Azerbaijan
| | - M. B. Babanly
- Baku State University, AZ1148 Baku, Azerbaijan
- Institute of Catalysis and Inorganic Chemistry, ANAS, AZ1143 Baku, Azerbaijan
| | - M. M. Otrokov
- Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, 20018 Donostia-San Sebastián, Basque Country Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Basque Country Spain
| | - S. V. Eremeev
- Saint Petersburg State University, 198504 Saint Petersburg, Russia
- Institute of Strength Physics and Materials Science, 634055 Tomsk, Russia
- Tomsk State University, 634050 Tomsk, Russia
| | - E. V. Chulkov
- Saint Petersburg State University, 198504 Saint Petersburg, Russia
- Tomsk State University, 634050 Tomsk, Russia
- Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Basque Country Spain
- Departamento de Física de Materiales, Facultad de Ciencias Químicas, UPV/EHU, Apdo. 1072, 20080 San Sebastián, Spain
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37
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Usachov DY, Nechaev IA, Poelchen G, Güttler M, Krasovskii EE, Schulz S, Generalov A, Kliemt K, Kraiker A, Krellner C, Kummer K, Danzenbächer S, Laubschat C, Weber AP, Sánchez-Barriga J, Chulkov EV, Santander-Syro AF, Imai T, Miyamoto K, Okuda T, Vyalikh DV. Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials. Phys Rev Lett 2020; 124:237202. [PMID: 32603174 DOI: 10.1103/physrevlett.124.237202] [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] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/13/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Spin-orbit interaction and structure inversion asymmetry in combination with magnetic ordering is a promising route to novel materials with highly mobile spin-polarized carriers at the surface. Spin-resolved measurements of the photoemission current from the Si-terminated surface of the antiferromagnet TbRh_{2}Si_{2} and their analysis within an ab initio one-step theory unveil an unusual triple winding of the electron spin along the fourfold-symmetric constant energy contours of the surface states. A two-band k·p model is presented that yields the triple winding as a cubic Rashba effect. The curious in-plane spin-momentum locking is remarkably robust and remains intact across a paramagnetic-antiferromagnetic transition in spite of spin-orbit interaction on Rh atoms being considerably weaker than the out-of-plane exchange field due to the Tb 4f moments.
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Affiliation(s)
- D Yu Usachov
- St. Petersburg State University, 7/9 Universitetskaya Naberezhnaya, St. Petersburg, 199034, Russia
| | - I A Nechaev
- Department of Electricity and Electronics, FCT-ZTF, UPV-EHU, 48080 Bilbao, Spain
| | - G Poelchen
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - M Güttler
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - E E Krasovskii
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- Departamento de Física de Materiales UPV/EHU, 20080 Donostia/San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - S Schulz
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - A Generalov
- Max IV Laboratory, Lund University, Box 118, 22100 Lund, Sweden
| | - K Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - A Kraiker
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - C Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - K Kummer
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble, France
| | - S Danzenbächer
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - C Laubschat
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - A P Weber
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
| | - J Sánchez-Barriga
- Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - E V Chulkov
- St. Petersburg State University, 7/9 Universitetskaya Naberezhnaya, St. Petersburg, 199034, Russia
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- Departamento de Física de Materiales UPV/EHU, 20080 Donostia/San Sebastián, Basque Country, Spain
- Centro de Física de Materiales CFM-MPC and Centro Mixto CSIC-UPV/EHU, 20018 Donostia/San Sebastián, Basque Country, Spain
- Tomsk State University, Lenina Avenue 36, 634050, Tomsk, Russia
| | - A F Santander-Syro
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405, Orsay, France
| | - T Imai
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - T Okuda
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - D V Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
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Mitsuishi N, Sugita Y, Bahramy MS, Kamitani M, Sonobe T, Sakano M, Shimojima T, Takahashi H, Sakai H, Horiba K, Kumigashira H, Taguchi K, Miyamoto K, Okuda T, Ishiwata S, Motome Y, Ishizaka K. Switching of band inversion and topological surface states by charge density wave. Nat Commun 2020; 11:2466. [PMID: 32424170 PMCID: PMC7235022 DOI: 10.1038/s41467-020-16290-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 04/25/2020] [Indexed: 11/10/2022] Open
Abstract
Topologically nontrivial materials host protected edge states associated with the bulk band inversion through the bulk-edge correspondence. Manipulating such edge states is highly desired for developing new functions and devices practically using their dissipation-less nature and spin-momentum locking. Here we introduce a transition-metal dichalcogenide VTe2, that hosts a charge density wave (CDW) coupled with the band inversion involving V3d and Te5p orbitals. Spin- and angle-resolved photoemission spectroscopy with first-principles calculations reveal the huge anisotropic modification of the bulk electronic structure by the CDW formation, accompanying the selective disappearance of Dirac-type spin-polarized topological surface states that exist in the normal state. Thorough three dimensional investigation of bulk states indicates that the corresponding band inversion at the Brillouin zone boundary dissolves upon the CDW formation, by transforming into anomalous flat bands. Our finding provides a new insight to the topological manipulation of matters by utilizing CDWs' flexible characters to external stimuli.
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Affiliation(s)
- N Mitsuishi
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako, 113-8656, Japan
| | - Y Sugita
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - M S Bahramy
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako, 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan
| | - M Kamitani
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako, 113-8656, Japan
| | - T Sonobe
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako, 113-8656, Japan
| | - M Sakano
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako, 113-8656, Japan
| | - T Shimojima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan
| | - H Takahashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - H Sakai
- Department of Physics, Osaka University, Toyonaka, Osaka, 560-0043, Japan
| | - K Horiba
- Condensed Matter Research Center and Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801, Japan
| | - H Kumigashira
- Condensed Matter Research Center and Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801, Japan
| | - K Taguchi
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - T Okuda
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - S Ishiwata
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Y Motome
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - K Ishizaka
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan.
- Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako, 113-8656, Japan.
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.
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39
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Oka SI, Nakamura M, Nozu R, Miyamoto K. First observation of larval oarfish, Regalecus russelii, from fertilized eggs through hatching, following artificial insemination in captivity. Zoological Lett 2020; 6:4. [PMID: 32292594 PMCID: PMC7140580 DOI: 10.1186/s40851-020-00156-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/20/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Little is known about the life history of oarfish of the genus Regalecus, although it is a famous deep-sea fish and an apparent origin of sea serpent legends. We successfully performed artificial insemination using a recently dead pair of sexually mature individuals. We report for the first time development from fertilized eggs to early larvae in the Lampridiformes. RESULTS Eggs required 18 days of development from fertilization to hatching under 20.5-22.5 °C conditions. Oarfish larvae had similar morphological features as other lampridiform larvae hatched in the ocean. Larvae typically faced downward and swam using pectoral fins; they frequently opened their mouths. This mouth-opening behavior and swimming ability were both consistent with osteological development. The larvae did not eat and died four days after hatching. CONCLUSIONS This is the first successful instance of artificial insemination and hatching in the oarfish, as well as the first reliable morphological and behavioral description of lampridiform larvae.
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Affiliation(s)
- Shin-ichiro Oka
- Okinawa Churashima Foundation, 888 Ishikawa, Motobu-cho, Okinawa, 905-0206 Japan
| | - Masaru Nakamura
- Okinawa Churashima Foundation, 888 Ishikawa, Motobu-cho, Okinawa, 905-0206 Japan
| | - Ryo Nozu
- Okinawa Churashima Foundation, 888 Ishikawa, Motobu-cho, Okinawa, 905-0206 Japan
| | - Kei Miyamoto
- Okinawa Churashima Foundation, 888 Ishikawa, Motobu-cho, Okinawa, 905-0206 Japan
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40
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Sakano M, Hirayama M, Takahashi T, Akebi S, Nakayama M, Kuroda K, Taguchi K, Yoshikawa T, Miyamoto K, Okuda T, Ono K, Kumigashira H, Ideue T, Iwasa Y, Mitsuishi N, Ishizaka K, Shin S, Miyake T, Murakami S, Sasagawa T, Kondo T. Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure. Phys Rev Lett 2020; 124:136404. [PMID: 32302163 DOI: 10.1103/physrevlett.124.136404] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/10/2020] [Indexed: 06/11/2023]
Abstract
The chiral crystal is characterized by a lack of mirror symmetry and inversion center, resulting in the inequivalent right- and left-handed structures. In the noncentrosymmetric crystal structure, the spin and momentum of electrons are expected to be locked in the reciprocal space with the help of the spin-orbit interaction. To reveal the spin textures of chiral crystals, we investigate the spin and electronic structure in a p-type semiconductor, elemental tellurium, with the simplest chiral structure by using spin- and angle-resolved photoemission spectroscopy. Our data demonstrate that the highest valence band crossing the Fermi level has a spin component parallel to the electron momentum around the Brillouin zone corners. Significantly, we have also confirmed that the spin polarization is reversed in the crystal with the opposite chirality. The results indicate that the spin textures of the right- and left-handed chiral crystals are hedgehoglike, leading to unconventional magnetoelectric effects and nonreciprocal phenomena.
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Affiliation(s)
- M Sakano
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa 277-8581, Japan
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - M Hirayama
- Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
- Tokodai Institute for Element Strategy (TIES), Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - T Takahashi
- Materials and Structures Laboratory (MSL), Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - S Akebi
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa 277-8581, Japan
| | - M Nakayama
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa 277-8581, Japan
| | - K Kuroda
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa 277-8581, Japan
| | - K Taguchi
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - T Yoshikawa
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - T Okuda
- Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - K Ono
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Kumigashira
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - T Ideue
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Y Iwasa
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - N Mitsuishi
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - K Ishizaka
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - S Shin
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa 277-8581, Japan
| | - T Miyake
- Research Center for Computational Design of Advanced Functional Materials (CD-FMat), AIST, Tsukuba, Ibaraki 305-8568, Japan
| | - S Murakami
- Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
- Tokodai Institute for Element Strategy (TIES), Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
| | - T Sasagawa
- Materials and Structures Laboratory (MSL), Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - Takeshi Kondo
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa 277-8581, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), Kashiwa, Chiba 277-8581, Japan
- Trans-scale Quantum Science Institute, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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Higuchi C, Yamamoto M, Shin SW, Miyamoto K, Matsumoto K. Perturbation of maternal PIASy abundance disrupts zygotic genome activation and embryonic development via SUMOylation pathway. Biol Open 2019; 8:bio.048652. [PMID: 31640975 PMCID: PMC6826278 DOI: 10.1242/bio.048652] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
During the maternal-to-zygotic transition (MZT), mRNAs and proteins stored in oocytes are degraded and zygotic genes are activated. We have previously shown that the ubiquitin-proteasome system (UPS)-mediated degradation of maternal proteins plays a role in the onset of zygotic transcription. However, it is still unclear which maternal proteins should be degraded for zygotic genome activation and ensuring subsequent embryonic development. In this study, we screen for these maternal factors that are degraded via the UPS. We thus identified a maternal protein PIASy (protein inhibitor of activated STATy), which is an E3 SUMO ligase. The overexpression of PIASy in fertilized embryos causes developmental arrest at the two-cell stage due to severe abnormal chromosome segregation and impaired zygotic transcription. We find that this developmental role of PIASy is related to its SUMOylation activity. Moreover, PIASy overexpression leads to increased trimethylation of histone H3 lysine 9 (H3K9me3) in two-cell nuclei and enhanced translocation of H3K9me3 methyltransferase to the pronucleus. Hence, PIASy is a maternal factor that is degraded after fertilization and may be important for the proper induction of zygotic genome activation and embryonic development.
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Affiliation(s)
- Chika Higuchi
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Mari Yamamoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Seung-Wook Shin
- Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Kei Miyamoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Kazuya Matsumoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
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42
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Kamakura T, Nakajima K, Kataoka N, Wada M, Yamagata K, Ishibashi K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Yasuda S, Kusano K. P5655Efficacy of new-generation atrial antitachycardia pacing for atrial tachyarrhythmias in patients with left ventricular dysfunction. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0598] [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
The progression to persistent atrial fibrillation (AF) is associated with a worse clinical outcome in patients with previous atrial tachyarrhythmias. New-generation atrial antitachycardia pacing (ATP) (Reactive ATP) reduced the progression to persistent AF in patients with pacemaker and preserved left ventricular (LV) function. However, little is known about the efficacy of Reactive ATP in patients with cardiac implantable electronic devices (CIED) and LV dysfunction.
Purpose
We aimed to investigate the efficacy of Reactive ATP for atrial tachyarrhythmias in patients with LV dysfunction (LV ejection fraction [LVEF] <40%).
Methods
This study included 423 patients with CIED and previous atrial tachyarrthythmias. Reactive ATP was programmed in 284 patients (ATP group) and 139 were implanted with a dual-chamber device without ATP function (control group). The differences in the success rate of ATP and incidence of progression to persistent AF (≥7 days) between the ATP and control groups were evaluated in 108 patients with LVEF <40% (reduced LVEF) and 315 with LVEF ≥40% (preserved LVEF). Patients with persistent AF were excluded from this study.
Results
During 710±337 days of follow-up period, 16 patients (15%) with reduced LVEF and 51 (16%) with preserved LVEF progressed to persistent AF (p=0.88). The mean ATP success rate was lower in patients with reduced LVEF than in those with preserved LVEF, although not statistically significant (reduced LVEF: 27.2±19.4% and preserved LVEF: 35.1±29.2%, p=0.12). The incidence of progression to persistent AF was significantly lower in the ATP group than in the control group both in patients with reduced and preserved LVEF (log-rank, reduced LVEF: p=0.0070 and preserved LVEF: p<0.0001) (Figure). Multivariate analysis showed that use of Reactive ATP and smaller left atrium were associated with lower incidences of persistent AF, while LVEF was not predictive of progression to persistent AF (Reactive ATP: hazard ratio [HR] 0.28, 95% confidence interval [CI] 0.17–0.46, p<0.0001, left atrium diameter: HR 1.03, 95% CI 1.00–1.07, p=0.030).
Figure 1
Conclusions
Reactive ATP was effective in preventing AF progression in patients with LV dysfunction.
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Affiliation(s)
- T Kamakura
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Nakajima
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - N Kataoka
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - M Wada
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Yamagata
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Ishibashi
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - Y Inoue
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Miyamoto
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - S Nagase
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Noda
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Suita, Japan
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43
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Yamagata K, Nagai K, Miyamoto H, Anzai M, Kato H, Miyamoto K, Kurosaka S, Azuma R, Kolodeznikov II, Protopopov AV, Plotnikov VV, Kobayashi H, Kawahara-Miki R, Kono T, Uchida M, Shibata Y, Handa T, Kimura H, Hosoi Y, Mitani T, Matsumoto K, Iritani A. Signs of biological activities of 28,000-year-old mammoth nuclei in mouse oocytes visualized by live-cell imaging. Sci Rep 2019; 9:4050. [PMID: 30858410 PMCID: PMC6411884 DOI: 10.1038/s41598-019-40546-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 10/12/2018] [Accepted: 02/19/2019] [Indexed: 12/12/2022] Open
Abstract
The 28,000-year-old remains of a woolly mammoth, named ‘Yuka’, were found in Siberian permafrost. Here we recovered the less-damaged nucleus-like structures from the remains and visualised their dynamics in living mouse oocytes after nuclear transfer. Proteomic analyses demonstrated the presence of nuclear components in the remains. Nucleus-like structures found in the tissue homogenate were histone- and lamin-positive by immunostaining. In the reconstructed oocytes, the mammoth nuclei showed the spindle assembly, histone incorporation and partial nuclear formation; however, the full activation of nuclei for cleavage was not confirmed. DNA damage levels, which varied among the nuclei, were comparable to those of frozen-thawed mouse sperm and were reduced in some reconstructed oocytes. Our work provides a platform to evaluate the biological activities of nuclei in extinct animal species.
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Affiliation(s)
- Kazuo Yamagata
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Kouhei Nagai
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Hiroshi Miyamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Masayuki Anzai
- Institute of Advanced Technology, Kindai University, Wakayama, 642-0017, Japan
| | - Hiromi Kato
- Institute of Advanced Technology, Kindai University, Wakayama, 642-0017, Japan
| | - Kei Miyamoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Satoshi Kurosaka
- Institute of Advanced Technology, Kindai University, Wakayama, 642-0017, Japan
| | - Rika Azuma
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Igor I Kolodeznikov
- Department of Mammoth Faunal Studies, Sakha (Yakutia) Republic Academy of the Sciences, Yakutsk, 677077, Russia
| | - Albert V Protopopov
- Department of Mammoth Faunal Studies, Sakha (Yakutia) Republic Academy of the Sciences, Yakutsk, 677077, Russia
| | - Valerii V Plotnikov
- Department of Mammoth Faunal Studies, Sakha (Yakutia) Republic Academy of the Sciences, Yakutsk, 677077, Russia
| | - Hisato Kobayashi
- NODAI Genome Research Center, Tokyo University of Agriculture, Tokyo, 156-8502, Japan
| | - Ryouka Kawahara-Miki
- NODAI Genome Research Center, Tokyo University of Agriculture, Tokyo, 156-8502, Japan
| | - Tomohiro Kono
- NODAI Genome Research Center, Tokyo University of Agriculture, Tokyo, 156-8502, Japan.,Department of Bioscience, Tokyo University of Agriculture, Tokyo, 156-8502, Japan
| | - Masao Uchida
- National Institute for Environmental Studies, Ibaraki, 305-8506, Japan
| | - Yasuyuki Shibata
- National Institute for Environmental Studies, Ibaraki, 305-8506, Japan
| | - Tetsuya Handa
- Institute of Innovative Research, Tokyo Institute of Technology, Kanagawa, 226-8503, Japan
| | - Hiroshi Kimura
- Institute of Innovative Research, Tokyo Institute of Technology, Kanagawa, 226-8503, Japan
| | - Yoshihiko Hosoi
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Tasuku Mitani
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Kazuya Matsumoto
- Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama, 649-6493, Japan
| | - Akira Iritani
- Institute of Advanced Technology, Kindai University, Wakayama, 642-0017, Japan.
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Abstract
Maternal factors stored in eggs and oocytes are necessary for reprogramming sperm for embryonic development. This reprogramming activity of maternal factors also works towards somatic cells, including terminally differentiated cells. Several different experimental systems utilizing egg and oocyte materials have been applied to study nuclear reprogramming by maternal factors. Among these systems, the most widely used is the transfer of a somatic cell nucleus to an oocyte arrested at the metaphase II stage, leading to the production of a cloned animal. Nuclear transfer to an unfertilized oocyte thus provides a unique opportunity to examine reprogramming processes involved in acquiring totipotency. Other experimental systems are also available to study maternal reprogramming, such as nuclear transfer to Xenopus laevis oocytes at the germinal vesicle stage, treatment with extracts obtained from eggs or oocytes, and induced pluripotency with overexpressed maternal factors. Each system can be used for answering different types of scientific questions. This review describes currently available reprogramming systems using egg and oocyte materials and discusses how we can deepen our understanding of reprogramming mechanisms by taking advantage of these various experimental systems.
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Affiliation(s)
- Kei Miyamoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
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45
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Imai T, Miyamoto K, Sezaki A, Kawase F, Shirai Y, Abe C, Fukaya A, Kato T, Sanada M, Shimokata H. Traditional Japanese Diet Score - Association with Obesity, Incidence of Ischemic Heart Disease, and Healthy Life Expectancy in a Global Comparative Study. J Nutr Health Aging 2019; 23:717-724. [PMID: 31560029 DOI: 10.1007/s12603-019-1219-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 12/16/2022]
Abstract
OBJECTIVES We created a Traditional Japanese Diet Score (TJDS), and to clarify the relationship between TJDS and obesity, ischemic heart disease (IHD), and healthy life expectancy (HALE). DESIGN Ecological study. SETTING Food (g/day/capita) and energy (kcal/day/capita) supply was determined using the Food and Agriculture Organization of the United Nations Statistics Division database. The sum of characteristic traditional Japanese foods (beneficial food components in the Japanese diet: rice, fish, soybeans, vegetables, eggs, and seaweeds; food components rarely used in the Japanese diet: wheat, milk, and red meat) was divided as tertiles (beneficial food components: -1, 0, 1; rarely used food components: 1, 0, -1). Obesity rate was determined using the World Health Organization database. Incidence of IHD, HALE and smoking rate were determined using the Global Burden of Diseases, Injuries, and Risk Factors Study 2015 database. Gross domestic product per capita, percentage of population > 65 years old, and health expenditure were determined using the World Bank database. Education years were obtained from the United Nations Educational, Scientific and Cultural Organization Institute for Statistics. Associations between TJDS and obesity, IHD and HALE were examined in 132 countries with a population of 1 million or greater using a general linear model controlled for co-variables. RESULTS TJDS was distributed from -6 to 7. TJDS was inversely correlated to obesity (β±SE; -0.70±0.19, p<0.001), IHD (-19.4±4.3, p<0.001), and positively correlated to HALE (0.40±0.14, p<0.01). CONCLUSIONS TJDS is a good indicator of a healthy diet, and applies to preventing obesity, IHD and extending HALE.
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Affiliation(s)
- T Imai
- Tomoko Imai, Doshisha Joshi Daigaku, Food science and Nutrition, Teramachi Nishiiru, Imadegawa-dori, Kamigyo-ku, Kyoto, Kyoto 602-0893, Japan, 81-75-251-4266, mobile: 81-90-6594-8534, Fax: 81-75-251-4266,
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Wada M, Kamakura T, Yamagata K, Ishibashi K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Kusano K. P3217Relationship between conductor externalization and electrical malfunction in recalled and non-recalled implantable defibrillator leads. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3217] [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)
- M Wada
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - T Kamakura
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - K Yamagata
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - K Ishibashi
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Y Inoue
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - K Miyamoto
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - S Nagase
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - T Noda
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center, Osaka, Japan
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Korai K, Ishibashi K, Kamakura T, Wada M, Yamagata K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Noguchi T, Yasuda S, Kusano K. P5777Clinical outcomes of patient with single-coil vs. dual-coil implantable cardioverter defibrillation lead for secondary prevention. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5777] [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: 11/14/2022] Open
Affiliation(s)
- K Korai
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Ishibashi
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Kamakura
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - M Wada
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Yamagata
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - Y Inoue
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Miyamoto
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Nagase
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Noda
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Noguchi
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
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Ueda N, Kamakura T, Wada M, Yamagata K, Ishibashi K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Izumi C, Noguchi T, Yasuda S, Kusano K. P5740Efficacy and safety of new-generation atrial antitachycardia pacing for atrial tachyarrhythmias in patients implanted with a cardiac resynchronization therapy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5740] [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: 11/14/2022] Open
Affiliation(s)
- N Ueda
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Kamakura
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - M Wada
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Yamagata
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Ishibashi
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - Y Inoue
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Miyamoto
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Nagase
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Noda
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Noguchi
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
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Otuki S, Kamakura T, Wada M, Ishibashi K, Yamagata K, Inoue Y, Miyamoto K, Nagase S, Noda T, Aiba T, Izumi C, Noguchi T, Yasuda S, Kusano K. P1904Comparison of the efficacy of new-generation atrial antitachycardia pacing between patients with sick sinus syndrome and atrioventricular block. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1904] [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)
- S Otuki
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - T Kamakura
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - M Wada
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - K Ishibashi
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - K Yamagata
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - Y Inoue
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - K Miyamoto
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - S Nagase
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - T Noda
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - T Noguchi
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
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Ueda N, Noda T, Kamakura T, Wada M, Yamagata K, Ishibashi K, Inoue Y, Miyamoto K, Nagase S, Aiba T, Izumi C, Noguchi T, Yasuda S, Kusano K. P1948The efficacy of a new device-based continuous optimization algorithm for mildly wide QRS and non-CLBBB patients with cardiac resynchronization therapy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1948] [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: 11/14/2022] Open
Affiliation(s)
- N Ueda
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Noda
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Kamakura
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - M Wada
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Yamagata
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Ishibashi
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - Y Inoue
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Miyamoto
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Nagase
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Noguchi
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center Hospital, Department of Cardiovascular Medicine, Osaka, Japan
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