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Kim BY, Gellert HR, Church SH, Suvorov A, Anderson SS, Barmina O, Beskid SG, Comeault AA, Crown KN, Diamond SE, Dorus S, Fujichika T, Hemker JA, Hrcek J, Kankare M, Katoh T, Magnacca KN, Martin RA, Matsunaga T, Medeiros MJ, Miller DE, Pitnick S, Simoni S, Steenwinkel TE, Schiffer M, Syed ZA, Takahashi A, Wei KHC, Yokoyama T, Eisen MB, Kopp A, Matute D, Obbard DJ, O'Grady PM, Price DK, Toda MJ, Werner T, Petrov DA. Single-fly assemblies fill major phylogenomic gaps across the Drosophilidae Tree of Life. bioRxiv 2023:2023.10.02.560517. [PMID: 37873137 PMCID: PMC10592941 DOI: 10.1101/2023.10.02.560517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Long-read sequencing is driving rapid progress in genome assembly across all major groups of life, including species of the family Drosophilidae, a longtime model system for genetics, genomics, and evolution. We previously developed a cost-effective hybrid Oxford Nanopore (ONT) long-read and Illumina short-read sequencing approach and used it to assemble 101 drosophilid genomes from laboratory cultures, greatly increasing the number of genome assemblies for this taxonomic group. The next major challenge is to address the laboratory culture bias in taxon sampling by sequencing genomes of species that cannot easily be reared in the lab. Here, we build upon our previous methods to perform amplification-free ONT sequencing of single wild flies obtained either directly from the field or from ethanol-preserved specimens in museum collections, greatly improving the representation of lesser studied drosophilid taxa in whole-genome data. Using Illumina Novaseq X Plus and ONT P2 sequencers with R10.4.1 chemistry, we set a new benchmark for inexpensive hybrid genome assembly at US $150 per genome while assembling genomes from as little as 35 ng of genomic DNA from a single fly. We present 183 new genome assemblies for 179 species as a resource for drosophilid systematics, phylogenetics, and comparative genomics. Of these genomes, 62 are from pooled lab strains and 121 from single adult flies. Despite the sample limitations of working with small insects, most single-fly diploid assemblies are comparable in contiguity (>1Mb contig N50), completeness (>98% complete dipteran BUSCOs), and accuracy (>QV40 genome-wide with ONT R10.4.1) to assemblies from inbred lines. We present a well-resolved multi-locus phylogeny for 360 drosophilid and 4 outgroup species encompassing all publicly available (as of August 2023) genomes for this group. Finally, we present a Progressive Cactus whole-genome, reference-free alignment built from a subset of 298 suitably high-quality drosophilid genomes. The new assemblies and alignment, along with updated laboratory protocols and computational pipelines, are released as an open resource and as a tool for studying evolution at the scale of an entire insect family.
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Affiliation(s)
| | | | - Samuel H Church
- Department of Ecology and Evolutionary Biology, Yale University, USA
| | - Anton Suvorov
- Department of Biological Sciences, Virginia Tech, USA
| | - Sean S Anderson
- Department of Biology, University of North Carolina Chapel Hill, USA
| | - Olga Barmina
- Department of Evolution and Ecology, University of California Davis, USA
| | | | - Aaron A Comeault
- School of Environmental and Natural Sciences, Bangor University, UK
| | - K Nicole Crown
- Department of Biology, Case Western Reserve University, USA
| | | | - Steve Dorus
- Center for Reproductive Evolution, Department of Biology, Syracuse University, USA
| | - Takako Fujichika
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - James A Hemker
- Department of Developmental Biology, Stanford University, USA
| | - Jan Hrcek
- Institute of Entomology, Biology Centre, Czech Academy of Sciences, Czechia
| | - Maaria Kankare
- Department of Biological and Environmental Science, University of Jyväskylä, Finland
| | - Toru Katoh
- Department of Biological Sciences, Hokkaido University, Japan
| | - Karl N Magnacca
- Hawaii Invertebrate Program, Division of Forestry & Wildlife, State of Hawaii, USA
| | - Ryan A Martin
- Department of Biology, Case Western Reserve University, USA
| | - Teruyuki Matsunaga
- Department of Complexity Science and Engineering, The University of Tokyo, Japan
| | | | - Danny E Miller
- Division of Genetic Medicine, Department of Pediatrics; Department of Laboratory Medicine and Pathology, University of Washington, USA
| | - Scott Pitnick
- Center for Reproductive Evolution, Department of Biology, Syracuse University, USA
| | - Sara Simoni
- Department of Biology, Stanford University, USA
| | | | - Michele Schiffer
- Daintree Rainforest Observatory, James Cook University, Australia
| | - Zeeshan A Syed
- Center for Reproductive Evolution, Department of Biology, Syracuse University, USA
| | - Aya Takahashi
- Department of Biological Sciences, Tokyo Metropolitan University, Japan
| | - Kevin H-C Wei
- Department of Zoology, The University of British Columbia
| | | | - Michael B Eisen
- Department of Cell and Molecular Biology, University of California Berkeley, United States
- Howard Hughes Medical Institute,University of California Berkeley, United States
| | - Artyom Kopp
- Department of Evolution and Ecology, University of California Davis, USA
| | - Daniel Matute
- Department of Biology, University of North Carolina Chapel Hill, USA
| | - Darren J Obbard
- Institute of Ecology and Evolution, University of Edinburgh, UK
| | | | - Donald K Price
- School of Life Sciences, University of Nevada Las Vegas, USA
| | | | - Thomas Werner
- Department of Biological Sciences, Michigan Technological University, USA
| | - Dmitri A Petrov
- Department of Biology, Stanford University, USA
- CZ Biohub, Investigator
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Zaitsu S, Yano M, Adachi S, Miwa M, Katoh T, Kawano Y, Yasuda M. 58P The lymphocyte activation gene-3 (LAG-3) protein expression in tumor-infiltrating lymphocytes is associated with a poor prognosis of ovarian clear cell carcinoma. ESMO Open 2023. [DOI: 10.1016/j.esmoop.2023.100838] [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: 02/27/2023] Open
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van Neer RHP, Dranchak PK, Liu L, Aitha M, Queme B, Kimura H, Katoh T, Battaile KP, Lovell S, Inglese J, Suga H. Serum-Stable and Selective Backbone-N-Methylated Cyclic Peptides That Inhibit Prokaryotic Glycolytic Mutases. ACS Chem Biol 2022; 17:2284-2295. [PMID: 35904259 PMCID: PMC9900472 DOI: 10.1021/acschembio.2c00403] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
N-Methylated amino acids (N-MeAAs) are privileged residues of naturally occurring peptides critical to bioactivity. However, de novo discovery from ribosome display is limited by poor incorporation of N-methylated amino acids into the nascent peptide chain attributed to a poor EF-Tu affinity for the N-methyl-aminoacyl-tRNA. By reconfiguring the tRNA's T-stem region to compensate and tune the EF-Tu affinity, we conducted Random nonstandard Peptides Integrated Discovery (RaPID) display of a macrocyclic peptide (MCP) library containing six different N-MeAAs. We have here devised a "pool-and-split" enrichment strategy using the RaPID display and identified N-methylated MCPs against three species of prokaryotic metal-ion-dependent phosphoglycerate mutases. The enriched MCPs reached 57% N-methylation with up to three consecutively incorporated N-MeAAs, rivaling natural products. Potent nanomolar inhibitors ranging in ortholog selectivity, strongly mediated by N-methylation, were identified. Co-crystal structures reveal an architecturally related Ce-2 Ipglycermide active-site metal-ion-coordinating Cys lariat MCP, functionally dependent on two cis N-MeAAs with broadened iPGM species selectivity over the original nematode-selective MCPs. Furthermore, the isolation of a novel metal-ion-independent Staphylococcus aureus iPGM inhibitor utilizing a phosphoglycerate mimetic mechanism illustrates the diversity of possible chemotypes encoded by the N-MeAA MCP library.
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Affiliation(s)
- R H P van Neer
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - P K Dranchak
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850, United States
| | - L Liu
- Protein Structure and X-ray Crystallography Laboratory, Structural Biology Center, University of Kansas, Lawrence, Kansas 66045, United States
| | - M Aitha
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850, United States
| | - B Queme
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850, United States
| | - H Kimura
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - T Katoh
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - K P Battaile
- New York Structural Biology Center, NSLS-II, Upton, New York 11973, United States
| | - S Lovell
- Protein Structure and X-ray Crystallography Laboratory, Structural Biology Center, University of Kansas, Lawrence, Kansas 66045, United States
| | - J Inglese
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850, United States
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - H Suga
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
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4
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Finet C, Kassner VA, Carvalho AB, Chung H, Day JP, Day S, Delaney EK, De Ré FC, Dufour HD, Dupim E, Izumitani HF, Gautério TB, Justen J, Katoh T, Kopp A, Koshikawa S, Longdon B, Loreto EL, Nunes MDS, Raja KKB, Rebeiz M, Ritchie MG, Saakyan G, Sneddon T, Teramoto M, Tyukmaeva V, Vanderlinde T, Wey EE, Werner T, Williams TM, Robe LJ, Toda MJ, Marlétaz F. DrosoPhyla: Resources for Drosophilid Phylogeny and Systematics. Genome Biol Evol 2021; 13:evab179. [PMID: 34343293 PMCID: PMC8382681 DOI: 10.1093/gbe/evab179] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2021] [Indexed: 02/06/2023] Open
Abstract
The vinegar fly Drosophila melanogaster is a pivotal model for invertebrate development, genetics, physiology, neuroscience, and disease. The whole family Drosophilidae, which contains over 4,400 species, offers a plethora of cases for comparative and evolutionary studies. Despite a long history of phylogenetic inference, many relationships remain unresolved among the genera, subgenera, and species groups in the Drosophilidae. To clarify these relationships, we first developed a set of new genomic markers and assembled a multilocus data set of 17 genes from 704 species of Drosophilidae. We then inferred a species tree with highly supported groups for this family. Additionally, we were able to determine the phylogenetic position of some previously unplaced species. These results establish a new framework for investigating the evolution of traits in fruit flies, as well as valuable resources for systematics.
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Affiliation(s)
- Cédric Finet
- Howard Hughes Medical Institute and Laboratory of Molecular Biology, University of Wisconsin, Madison, USA
| | - Victoria A Kassner
- Howard Hughes Medical Institute and Laboratory of Molecular Biology, University of Wisconsin, Madison, USA
| | - Antonio B Carvalho
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Brazil
| | - Henry Chung
- Department of Entomology, Michigan State University, USA
| | - Jonathan P Day
- Department of Genetics, University of Cambridge, United Kingdom
| | - Stephanie Day
- Department of Biological Sciences, University of Pittsburgh, USA
| | - Emily K Delaney
- Department of Evolution and Ecology, University of California-Davis, USA
| | - Francine C De Ré
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Héloïse D Dufour
- Howard Hughes Medical Institute and Laboratory of Molecular Biology, University of Wisconsin, Madison, USA
| | - Eduardo Dupim
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Brazil
| | - Hiroyuki F Izumitani
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - Thaísa B Gautério
- Programa de Pós-Graduação em Biologia de Ambientes Aquáticos Continentais, Universidade Federal do Rio Grande, Rio Grande do Sul, Brazil
| | - Jessa Justen
- Howard Hughes Medical Institute and Laboratory of Molecular Biology, University of Wisconsin, Madison, USA
| | - Toru Katoh
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - Artyom Kopp
- Department of Evolution and Ecology, University of California-Davis, USA
| | - Shigeyuki Koshikawa
- The Hakubi Center for Advanced Research and Graduate School of Science, Kyoto University, Japan
| | - Ben Longdon
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Elgion L Loreto
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Maria D S Nunes
- Department of Biological and Medical Sciences, Oxford Brookes University, United Kingdom
- Centre for Functional Genomics, Oxford Brookes University, United Kingdom
| | - Komal K B Raja
- Department of Biological Sciences, Michigan Technological University, USA
| | - Mark Rebeiz
- Department of Biological Sciences, University of Pittsburgh, USA
| | | | - Gayane Saakyan
- Department of Evolution and Ecology, University of California-Davis, USA
| | - Tanya Sneddon
- School of Biology, University of St Andrews, United Kingdom
| | - Machiko Teramoto
- The Hakubi Center for Advanced Research and Graduate School of Science, Kyoto University, Japan
| | | | - Thyago Vanderlinde
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Brazil
| | - Emily E Wey
- Department of Biology, University of Dayton, USA
| | - Thomas Werner
- Department of Biological Sciences, Michigan Technological University, USA
| | | | - Lizandra J Robe
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
- Programa de Pós-Graduação em Biologia de Ambientes Aquáticos Continentais, Universidade Federal do Rio Grande, Rio Grande do Sul, Brazil
| | - Masanori J Toda
- Hokkaido University Museum, Hokkaido University, Sapporo, Japan
| | - Ferdinand Marlétaz
- Centre for Life’s Origins and Evolution, Department of Genetics, Evolution and Environment, University College London, United Kingdom
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5
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Zhang Y, Katoh TK, Finet C, Izumitani HF, Toda MJ, Watabe HA, Katoh T. Phylogeny and evolution of mycophagy in the Zygothrica genus group (Diptera: Drosophilidae). Mol Phylogenet Evol 2021; 163:107257. [PMID: 34252547 DOI: 10.1016/j.ympev.2021.107257] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 06/02/2021] [Accepted: 07/07/2021] [Indexed: 11/17/2022]
Abstract
Despite numerous phylogenetic studies on the family Drosophilidae, relationships among some important lineages are still poorly resolved. An example is the equivocal position of the Zygothrica genus group that is mostly comprised of the mycophagous genera Hirtodrosophila, Mycodrosophila, Paramycodrosophila, and Zygothrica. To fill this gap, we conducted a phylogenetic analysis by assembling a dataset of 24 genes from 92 species, including 42 species of the Zygothrica genus group mainly from the Palearctic and Oriental regions. The resulting tree shows that the Zygothrica genus group is monophyletic and places it as the sister to the genus Dichaetophora, and the clade Zygothrica genus group + Dichaetophora is sister to the Siphlodora + Idiomyia/Scaptomyza clade. Within the Zygothrica genus group, the genera Mycodrosophila and Paramycodrosophila are both recognized as monophyletic, while neither the genus Zygothrica nor Hirtodrosophila is monophyletic. We also used this phylogenetic tree to investigate the evolution of mycophagy by reconstructing ancestral food habit in the Drosophilidae. We found that fungus-feeding habit has been gained independently in two lineages. The most recent common ancestor (MRCA) of the subgenus Drosophila was estimated to have acquired mycophagy by expanding its ancestral feeding niche on fermenting fruits to decayed fungi, while the MRCA of the Zygothrica genus group shifted its niche from fruits to fungi as a specialist probably preferring fresh fruiting bodies.
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Affiliation(s)
- Yang Zhang
- Department of Natural History Science, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takehiro K Katoh
- Laboratory of Ecology & Evolutionary Biology, Yunnan University, Kunming 650091, China
| | - Cédric Finet
- Division of Science, Yale-NUS College, 138527, Singapore
| | - Hiroyuki F Izumitani
- Department of Natural History Science, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Masanori J Toda
- Hokkaido University Museum, Hokkaido University, Sapporo 060-0810, Japan
| | - Hide-Aki Watabe
- Hokkaido University Museum, Hokkaido University, Sapporo 060-0810, Japan
| | - Toru Katoh
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
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Nishikawa K, Nagae A, Miura T, Katoh T, Kanzaki Y, Abe N, Yokota D, Yanagisawa T, Senda K, Wakabayashi T, Oyama Y, Okina Y, Nakazawa S, Tsukada S, Kagoshima M. Impact of frailty on super elderly patients with peripheral artery disease from the I-PAD 3 year registry. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2391] [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
Unlike age, frailty is often not taken into account in treatment indications of Endovascular treatment (EVT). One of the reason is that there was little known the relationship between frailty and the outcome of EVT for super elderly patients with peripheral artery disease (PAD). We investigate impacts of frailty on the super elderly patient prognosis who underwent EVT.
Purpose
To investigate impacts of frailty on the super elderly patient prognosis who underwent EVT.
Methods
From August 2015 to July 2016, 335 consecutive patients who underwent EVT were enrolled in the I-PAD registry from 7 institutes in Nagano prefecture. Among them, we selected and analyzed 91 super elderly PAD patients (≥80 years-old) and divided them into two groups:those with moderate or higher frailty (Clinical Frailty Scale (CFS) ≥6, n=28) and those without (CFS ≤5, n=63). The primary endpoints were cardiovascular death and major adverse cardiovascular and limb events (MACLE), defined as a composite of cardiovascular death, myocardial infarction, stroke, admission for heart failure, major amputation and revascularization.
Results
The median follow-up period was 2.7 years. Freedom rate from cardiovascular death and MACLE were significantly lower among patients with moderate or higher frailty than among those without (47.0% vs. 58.0%, P=0.03; 39.1% vs. 68.5%, P<0.01).
Conclusion
The prognosis of super elderly patients with moderate or higher frailty is worse than those without.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - A Nagae
- Shinshu University Hospital, Matsumoto, Japan
| | - T Miura
- Nagano Municipal Hospital, Nagano, Japan
| | - T Katoh
- Shinshu University Hospital, Matsumoto, Japan
| | - Y Kanzaki
- Shinonoi General Hospital, Nagano, Japan
| | - N Abe
- Nagano Red Cross Hospital, Nagano, Japan
| | - D Yokota
- Iida Hospital, Department of Cardiovascular Medicine, Iida, Japan
| | - T Yanagisawa
- Saku Central Hospital, Department of Cardiovascular Medicine, Saku, Japan
| | - K Senda
- Aizawa Hospital, Matsumoto, Japan
| | | | - Y Oyama
- Japanese Red Cross Society Suwa Hospital, Suwa, Japan
| | - Y Okina
- Joetsu General Hospital, Joetsu, Japan
| | | | - S Tsukada
- Joetsu General Hospital, Joetsu, Japan
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7
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Kubo T, Takano H, Takayama M, Doi Y, Minami Y, Ebato M, Inomata T, Katoh T, Okamoto R, Chikamori T, Watanabe E, Furugen A, Maekwa Y, Shimizu W, Kitaoka H. Baseline clinical features in a large-scale registration survey of patient with hypertrophic cardiomyopathy throughout Japan: J-HCM registry study. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2085] [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
Hypertrophic cardiomyopathy (HCM) is a most prevalent primary myocardial disorder with heterogeneous clinical features. However, there have been few studies on clinical features of HCM as a prospective cohort. In 2015, we established a large-scale registration survey of patients with HCM throughout Japan, named J-HCM registry study.
Purpose
The aim of this study was to clarify the clinical features of Japanese patients with HCM.
Methods
J-HCM registry study is a prospective, multicenter investigation, consisting of 24 hospitals. This time, we present the baseline clinical characteristics in this survey.
Results
Total 1484 patients were registered. The ages at registration and at diagnosis were 65±15 and 56±17 years, respectively, and 806 patients (54%) were men. Majority of the patients (95%) was NYHA class I or II. With regard to subtypes of HCM, there were 526 patients (36%) in the HCM with left ventricular (LV) outflow tract obstruction, 126 patients (8%) in the mid-ventricular obstruction, 57 patients (4%) in the end-stage phase characterized by LV ejection fraction <50%, and 197 patients (14%) in apical HCM. At registration, 80 patients (6%) had prior successful recovery from sustained ventricular tachycardia or ventricular fibrillation, 162 patients (11%) suffered from heart failure hospitalization, and 64 patients (4%) had history of embolic event. Regarding invasive treatment, 160 patients (10%) had prior septal reduction therapy and 162 patients (11%) had ICD implantation. According to the 2014 European Society of Cardiology Guidelines on sudden cardiac death (SCD) prevention, the study patients were divided into 3 categories by the HCM Risk-SCD calculator: patients distribution, 4% in the high risk group (≥6% calculated HCM Risk-SCD at 5 years), 7% in the intermediate risk group (4% to <6%), 69% in the low risk group (<4%), and 16% in the patients with extreme characteristics (Figure 1).
Conclusions
In this multicenter registration survey of patients with HCM, the baseline clinical characteristics were almost similar to several retrospective large-scale cohorts in Western countries except older age and less symptomatic state. This study will provide important knowledge regarding management of HCM.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Kubo
- Kochi Medical School, Kochi, Japan
| | - H Takano
- Nippon Medical School Teaching Hospital, Tokyo, Japan
| | - M Takayama
- Sakakibara Heart Institute, Fucyu Tokyo, Japan
| | - Y.L Doi
- Kochi Medical School, Kochi, Japan
| | - Y Minami
- Tokyo Women's Medical University, Tokyo, Japan
| | - M Ebato
- Showa University Fujigaoka Hospital, Yokohama, Japan
| | - T Inomata
- Kitasato University School of Medicine, Sagamihara, Japan
| | - T Katoh
- Kyoto University, Kyoto, Japan
| | - R Okamoto
- Mie University Graduate School of Medicine, Tsu, Japan
| | - T Chikamori
- Tokyo Medical University Hospital, Tokyo, Japan
| | - E Watanabe
- Fujita Health University School of Medicine, Toyoake, Japan
| | - A Furugen
- Sapporo Cardio Vascular Clinic, Sapporo, Japan
| | - Y Maekwa
- Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - W Shimizu
- Nippon Medical School Teaching Hospital, Tokyo, Japan
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8
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Toda MJ, BÄnziger H, Sati PC, Fartyal RS, Suwito A, Katoh T. Taxonomy and evolution of asymmetric male genitalia in the subgenus <br />Ashima Chen (Diptera: Drosophilidae: Phortica Schiner), with descriptions <br />of seven new species. Zootaxa 2020; 4789:zootaxa.4789.1.1. [PMID: 33056443 DOI: 10.11646/zootaxa.4789.1.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Indexed: 11/04/2022]
Abstract
The taxonomy of the subgenus Ashima of the genus Phortica is revised. A cladistic analysis of 66 morphological characters is conducted, covering 35 species (28 known and 7 new species: Phortica efragmentata sp. nov., P. andreagigoni sp. nov., P. watabei sp. nov., P. halimunensis sp. nov., P. akutsui sp. nov., P. kerinciensis sp. nov., and P. takehiroi sp. nov.) which correspond to 71.4% of 49 total spp. of Ashima. The resulting cladogram shows that the studied species are separated into several clades/subclades/cluster each highly supported with specific synapomorphies. Those clades/subclades/cluster are newly defined as the following species groups, subgroups or complex: the afoliolata, foliiseta, nigrifoliiseta and angulata species groups; the foliiseta, tanabei, nigrifoliiseta and glabra species subgroups; and the foliiseta species complex. The subgenus Ashima is peculiar in having the asymmetric male genitalia as the ground plan and showing the antisymmetry (i.e. intraspecific mirror-image variation) in some species but the directional asymmetry (i.e. side-fixed asymmetry) in others. The evolution of genital asymmetry in this subgenus is estimated by mapping the states (symmetry, directional asymmetry and antisymmetry) of bilateral structures of male genitalia on the cladogram. This ancestral state reconstruction estimates that the directional asymmetry of male genitalia has evolved at the ancestor of this subgenus and then changed to the antisymmetric state independently in two lineages, the angulata + nigrifoliiseta species groups and the foliiseta species complex. In this study, a standardized terminology recently proposed for the male terminalia of Drosophila melanogaster is extendedly adopted to describe the morphology of male terminalia in the subgenus Ashima, one group of the subfamily Steganinae.
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Affiliation(s)
- Masanori J Toda
- Hokkaido University Museum, Hokkaido University, Sapporo 060-0810, Japan.
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9
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Nagae A, Nishikawa K, Fujimori K, Katoh T, Miura T, Miyashita Y, Kashiwagi D, Senda K, Sakai T, Saigusa T, Ebisawa S, Motoki H, Okada A, Kuwahara K. P943The impact of diabetes on patients with frail after endovascular treatments: from I-PAD registry. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0537] [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
Diabetes mellitus (DM) is known to be one of the risks of arteriosclerosis. However, it is still unknown whether DM is a risk factor also in secondary prevention of frail patients after endovascular treatments (EVT)
Purpose
To investigate impact of diabetes on patients with frail after EVT.
Methods
From July 2015 to July 2016, 371 consecutive PAD patients who performed EVT were enrolled in I-PAD registry. We could conduct follow up survey 361 patients (446 lesions) and divided into 2 groups; with diabetes (185 patients, 226 lesions) or without diabetes (176 patients, 220 lesions) and analyzed. And among them,we selected 96 patients with frail and divided into 2 groups; with diabetes (49 patients, 70 lesions) or without diabetes (46 patients, 58 lesions) and analyzed. We defined frail patients as the patients with Clinical Frailty Scale 5 (mild frail) or higher. The primary end point was all-cause-death and major adverse limb events (MALE: TLR, TVR, major amputations) at 1 year.
Result
At 1 years in the patients group with diabetes, overall survival and freedom from MALE were significantly lower (81.7% vs 95.8% P<0.0001; 80.0% vs 94.6%, P<0.0001) than the group without diabetes.Among the patients with frail, between the patients group with diabetes and the group without, there is no significant differences in overall survival and freedom from MALE (88.2% vs 88.9% P=0.83; 80.7% vs 84.1%, P=0.55) at 5 years.
Conclusion
The prognosis of patients with diabetes after EVT was worse than the patient without. On the other hand, the prognosis of frail patients with diabetes after EVT was no difference with the frail patient without diabetes in this study.
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Affiliation(s)
- A Nagae
- Shinshu University Hospital, Matsumoto, Japan
| | - K Nishikawa
- Shinshu University Hospital, Matsumoto, Japan
| | - K Fujimori
- Shinshu University Hospital, Matsumoto, Japan
| | - T Katoh
- Shinshu University Hospital, Matsumoto, Japan
| | - T Miura
- Nagano municipal hospital, Cardiology, Nagano, Japan
| | - Y Miyashita
- Nagano Red Cross Hospital, Cardiology, Nagano, Japan
| | - D Kashiwagi
- Shinshu University Hospital, Matsumoto, Japan
| | - K Senda
- Shinshu University Hospital, Matsumoto, Japan
| | - T Sakai
- Shinshu University Hospital, Matsumoto, Japan
| | - T Saigusa
- Shinshu University Hospital, Matsumoto, Japan
| | - S Ebisawa
- Shinshu University Hospital, Matsumoto, Japan
| | - H Motoki
- Shinshu University Hospital, Matsumoto, Japan
| | - A Okada
- Shinshu University Hospital, Matsumoto, Japan
| | - K Kuwahara
- Shinshu University Hospital, Matsumoto, Japan
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10
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Fujimori K, Nagae A, Miura T, Katoh T, Hirabayashi M, Kashiwagi D, Yokota D, Yanagisawa T, Sakai T, Senda K, Saigusa T, Ebisawa S, Okada A, Motoki H, Kuwahara K. P942Impact of left ventricular ejection fraction in patients with critical limb ischemia: from I-PAD registry. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0536] [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
Introduction
In patients with critical limb ischemia (CLI) it is known that malnutrition, low BMI, inflammation and so on are prognostic factors. But, it is unclear whether left ventricular ejection fraction (LVEF) affects prognosis of CLI patients. So we investigated that LVEF affects prognosis of CLI patients.
Methods
From July 2015 to July 2016, 371 consecutive peripheral artery disease patients who performed endovascular treatment (EVT) were enrolled in I-PAD registry. 179 of them were patients with CLI. We could conduct follow up survey about 126 (age 75.5±11.1, men 63.5%) and divided two groups according to their LVEF (group with LVEF≤40%, n=13, group without LVEF≤40%, n=113). The primary end point was major adverse limb events (MALE: TLR, TVR, major amputations) and secondary end point was all-cause death.
Results
The median follow-up period was 11.5±6.7 months. The 18 months MALE rate was significant higher in the group with low LVEF than group without low LVEF (76.9% vs 37.2% p<0.05). The 18months all-cause death tended to be higher in the group with low LVEF, however there was not statistical significance in the two groups (53.8% vs 24.8% p=0.09).
Conclusion
LVEF was associated with MALE in patients with CLI.
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Affiliation(s)
- K Fujimori
- Shinshu University Hospital, Matsumoto, Japan
| | - A Nagae
- Shinshu University Hospital, Matsumoto, Japan
| | - T Miura
- Nagano municipal hospital, cardiology, Nagano, Japan
| | - T Katoh
- Shinshu University Hospital, Matsumoto, Japan
| | - M Hirabayashi
- Shinonoi General Hospital, cardiology, Matsumoto, Japan
| | - D Kashiwagi
- Shinshu University Hospital, Matsumoto, Japan
| | - D Yokota
- Iida Hospital, cardiology, iida, Japan
| | | | - T Sakai
- Shinshu University Hospital, Matsumoto, Japan
| | - K Senda
- Shinshu University Hospital, Matsumoto, Japan
| | - T Saigusa
- Shinshu University Hospital, Matsumoto, Japan
| | - S Ebisawa
- Shinshu University Hospital, Matsumoto, Japan
| | - A Okada
- Shinshu University Hospital, Matsumoto, Japan
| | - H Motoki
- Shinshu University Hospital, Matsumoto, Japan
| | - K Kuwahara
- Shinshu University Hospital, Matsumoto, Japan
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11
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Nishigawa K, Nagae A, Miura T, Katoh T, Hirabayashi M, Miyashita Y, Kashiwagi D, Mochidome T, Sakai T, Senda K, Saigusa T, Ebisawa S, Okada A, Motoki H, Kuwahara K. P1957Impact of fraility on the super elderly patients with peripheral artery disease. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0704] [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 current consensus is that frail patients have high risks of mortality. However, it remains unclear whether frailty is associated with mortality risks in super-elderly patients with peripheral artery disease (PAD).
Methods
The I-PAD registry was a prospective multicenter observational study involving 12 institutions in Nagano prefecture in Japan. From July 2015 to July 2016, the I-PAD registry enrolled 371 consecutive PAD patients who had undergone endovascular therapy (EVT). Among them, we selected and analysed 109 PAD patients who were >80 years old when they had undergone EVT and divided them into two groups: those with frailty (Clinical Frailty Scale≥5, n=47) and those without frailty (Clinical Frailty Scale≤4, n=62). The primary endpoints were overall survival and major adverse limb events (MALE), defined as a composite of all-cause death, major amputation and revascularization.
Results
The median follow-up period was 1.58±0.3 years. Overall, 109 patients with a mean age of 84.8±4.0 years, of whom 63.3% were men, were included. Overall survival and freedom from MALE were significantly lower among patients with frailty than among those without frailty (60.5% vs. 91.6%, P<0.001; 51.4% vs. 87.5%, P<0.001; respectively).
Conclusion
The prognosis of super-elderly patients with frailty is worse than that of patients without frailty.
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Affiliation(s)
- K Nishigawa
- Shinshu University Hospital, Matsumoto, Japan
| | - A Nagae
- Shinshu University Hospital, Matsumoto, Japan
| | - T Miura
- Nagano Municipal Hospital, Nagano, Japan
| | - T Katoh
- Shinshu University Hospital, Matsumoto, Japan
| | | | | | - D Kashiwagi
- Shinshu University Hospital, Matsumoto, Japan
| | | | - T Sakai
- Shinshu University Hospital, Matsumoto, Japan
| | - K Senda
- Shinshu University Hospital, Matsumoto, Japan
| | - T Saigusa
- Shinshu University Hospital, Matsumoto, Japan
| | - S Ebisawa
- Shinshu University Hospital, Matsumoto, Japan
| | - A Okada
- Shinshu University Hospital, Matsumoto, Japan
| | - H Motoki
- Shinshu University Hospital, Matsumoto, Japan
| | - K Kuwahara
- Shinshu University Hospital, Matsumoto, Japan
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12
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Fujimori K, Nagae A, Miura T, Katoh T, Hirabayashi M, Kashiwagi D, Yokota D, Yanagisawa T, Sakai T, Senda K, Saigusa T, Ebisawa S, Okada A, Motoki H, Kuwahara K. P936Impact of left ventricular ejection fraction in patients with peripheral artery disease: from I-PAD registry. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0530] [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
Introduction
In patients with peripheral artery disease (PAD) it is known that CVD is one of prognostic factors. But, it is unclear whether left ventricular ejection fraction (LVEF) affects prognosis of PAD patients. So we investigated that LVEF affects prognosis of PAD patients.
Methods
From July 2015 to July 2016, 371 consecutive PAD patients who performed endovascular treatment (EVT) were enrolled in I-PAD registry. We could conduct follow up survey about 337 (age 73.8±9.6, men 72.4%) patients and divided two groups according to their LVEF (group with LVEF≤40%, n=18, group without LVEF≤40%, n=319). The primary end point was major adverse limb events (MALE: TLR, TVR, major amputations) and secondary end point was all-cause death.
Results
The median follow-up period was 13.6±5.7 months. The 18 months MALE and all-cause death rate were significantly higher in the group with low LVEF than group without low LVEF (61.1% vs 21.6% p<0.001, 44.4% vs 11.6% p<0.001).
Conclusion
LVEF was significantly associated with MALE and all-cause death in patients with PAD.
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Affiliation(s)
- K Fujimori
- Shinshu University Hospital, Matsumoto, Japan
| | - A Nagae
- Shinshu University Hospital, Matsumoto, Japan
| | - T Miura
- Nagano municipal hospital, cardiology, Nagano, Japan
| | - T Katoh
- Shinshu University Hospital, Matsumoto, Japan
| | - M Hirabayashi
- Shinonoi General Hospital, cardiology, Matsumoto, Japan
| | - D Kashiwagi
- Shinshu University Hospital, Matsumoto, Japan
| | - D Yokota
- Iida Hospital, cardiology, iida, Japan
| | | | - T Sakai
- Shinshu University Hospital, Matsumoto, Japan
| | - K Senda
- Shinshu University Hospital, Matsumoto, Japan
| | - T Saigusa
- Shinshu University Hospital, Matsumoto, Japan
| | - S Ebisawa
- Shinshu University Hospital, Matsumoto, Japan
| | - A Okada
- Shinshu University Hospital, Matsumoto, Japan
| | - H Motoki
- Shinshu University Hospital, Matsumoto, Japan
| | - K Kuwahara
- Shinshu University Hospital, Matsumoto, Japan
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13
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Chen AL, Chen CC, Katoh T, Katoh TK, Watada M, Toda MJ, Ritchie MG, Wen SY. Evolution and diversity of the courtship repertoire in the Drosophila montium species group (Diptera: Drosophilidae). J Evol Biol 2019; 32:1124-1140. [PMID: 31386239 DOI: 10.1111/jeb.13515] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 07/31/2019] [Indexed: 02/04/2023]
Abstract
Changes in elements of courtship behaviour can influence sexual isolation between species. Large-scale analyses of changes, including loss and gain of courtship elements, across a relatively complete phylogenetic group are rare but needed to understand the significance of such changes, for example whether the gain and loss of courtship elements are essentially arbitrary or equally reversible. In most species of Drosophila, courtship, including singing, mainly occurs before mounting as premounting courtship. The Drosophila montium species group is unusual because loss of premounting courtship and gain of post-mounting one has been detected in this group. Here, we provide an extensive analysis on the courtship repertoire and songs of 42 species in this group. Synchronously captured video and audio recordings were analysed to describe courtship patterns and male courtship songs, and changes were analysed in a phylogenetic context. Ancestral state reconstruction suggests that a gain of post-mounting courtship singing at the ancestor of this species group has been accompanied by a concurrent decrease in the incidence of premounting courtship singing and has led to subsequent further decrease and eventually complete loss of premounting courtship song in several lineages. Alongside this evolutionary trend towards post-mounting courtship, sine song and a special type of "high pulse repetition song" have become more widely used for courtship during species diversification in the montium group. It is likely that the elaboration of post-mounting courtship behaviours is associated with changes in the relative importance of pre- and post-mounting components of mating systems, such as sperm competition or cryptic female choice.
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Affiliation(s)
- Ai-Li Chen
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Chuan-Cheng Chen
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Toru Katoh
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - Takehiro K Katoh
- Graduate School of Science and Engineering, Ehime University, Matsuyama, Ehime, Japan
| | - Masayoshi Watada
- Graduate School of Science and Engineering, Ehime University, Matsuyama, Ehime, Japan
| | - Masanori J Toda
- The Hokkaido University Museum, Hokkaido University, Sapporo, Japan
| | | | - Shuo-Yang Wen
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, China
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14
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Yamaguchi R, Sakamoto A, Yamamoto T, Narahara S, Sugiuchi H, Hisada A, Katoh T, Yamaguchi Y. Di-(2-ethylhexyl) phthalate suppresses IL-12p40 production by GM-CSF-dependent macrophages via the PPARα/TNFAIP3/TRAF6 axis after lipopolysaccharide stimulation. Hum Exp Toxicol 2017; 37:596-607. [PMID: 28673093 DOI: 10.1177/0960327117714038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Activation of peroxisome proliferator-activated receptor α (PPARα) by di-(2-ethylhexyl) phthalate (DEHP) has an anti-inflammatory effect. This study investigated the potential combined influence of PPARα, tumor necrosis factor α-induced protein 3 (TNFAIP3/A20), and tumor necrosis factor receptor-associated factor 6 (TRAF6) on interleukin (IL)-12p40 production by macrophages exposed to DEHP and stimulated with lipopolysaccharide (LPS). LPS upregulated IL-12p40 expression by granulocyte-macrophage colony-stimulating factor-dependent macrophages (on day 9 of culture), whereas adding DEHP to cultures significantly attenuated the response of IL-12p40 to LPS stimulation. PPARα protein was also reduced by DEHP. Interestingly, transfection of macrophages with small interfering RNA (siRNA) duplexes for PPARα, TNFAIP3/A20, or dual oxidase 2 restored the response of IL-12p40 protein to LPS stimulation in the presence of DEHP. siRNAs for various protein kinase Cs (PKCs) (α, β, γ, or δ) also restored IL-12p40 production by macrophages exposed to LPS and DEHP. While LPS upregulated both IL-12p40 and TNFAIP3/A20 production, adding DEHP to cultures dramatically reduced IL-12p40 and TNFAIP3/A20 levels. Silencing of PKCα reduced TNFAIP3/A20 production, whereas PKCγ siRNA (but not PKCβ or δ siRNA) significantly increased TNFAIP3/A20. TRAF6 was also attenuated by macrophages with DEHP. The PPARα/TNFAIP3/TRAF6 axis may have an important role in the mechanism through which DEHP reduces IL-12p40 production by LPS-stimulated macrophages.
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Affiliation(s)
- R Yamaguchi
- 1 Department of Public Health, Faculty of Life Sciences, Kumamoto University School of Medicine, Kumamoto, Japan.,2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - A Sakamoto
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - T Yamamoto
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - S Narahara
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - H Sugiuchi
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - A Hisada
- 1 Department of Public Health, Faculty of Life Sciences, Kumamoto University School of Medicine, Kumamoto, Japan
| | - T Katoh
- 1 Department of Public Health, Faculty of Life Sciences, Kumamoto University School of Medicine, Kumamoto, Japan
| | - Y Yamaguchi
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
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15
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Suga H, Hirano W, Katoh T, Matsubayashi KW, Katakura H. Introgression and Habitat Segregation in a Pair of Ladybird Beetle Species in the Genus Propylea (Coccinellidae, Coccinellinae) in Northern Japan. Zoolog Sci 2016; 33:603-610. [PMID: 27927100 DOI: 10.2108/zs160062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The ladybird beetles Propylea quatuordecimpunctata and P. japonica have largely overlapping distributions in northern Japan, and in the laboratory produce fertile hybrids. In this study, we surveyed the distribution and morphological differentiation of these species and the hybrids in natural populations, with a focus on western Hokkaido, northern Japan. Phenotypic analyses were conducted for 987 individuals collected at 90 localities. In addition, the nuclear internal transcribed spacer-II (ITS2) region (549 bp) and part of the mitochondrial cytochrome c oxidase subunit I (COI) gene (700 bp) were sequenced for 620 individuals from 53 localities. Analyses of both phenotypic and genotypic features discriminated two distinct entities assignable to P. quatuordecimpunctata and P. japonica. However, individuals with intermediate phenotypes and/or genotypes also occurred extensively, indicating natural hybridization. Putative P. quatuordecimpunctata individuals were collected across a wide range of altitudes (30-600 m), whereas those of P. japonica were found mostly lower than 300 m alt. In addition, P. quatuordecimpunctata was dominant in semi-open habitats shaded by canopy foliage, whereas P. japonica was frequent in more open habitats. The perceived altitudinal difference in the distributions may thus in part be a consequence of this different habitat preference, as open habitats are more common at lower altitudes in the study area.
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Affiliation(s)
- Hiromu Suga
- 1 Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Wataru Hirano
- 1 Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Toru Katoh
- 1 Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Kei W Matsubayashi
- 2 The Faculty of Arts and Science, Kyushu University, Fukuoka 819-0395, Japan
| | - Haruo Katakura
- 1 Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.,3 The Hokkaido University Museum, Hokkaido University, Sapporo 060-0810, Japan
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16
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Hiruta SF, Kobayashi N, Katoh T, Kajihara H. Molecular Phylogeny of Cypridoid Freshwater Ostracods (Crustacea: Ostracoda), Inferred from 18S and 28S rDNA Sequences. Zoolog Sci 2016; 33:179-85. [PMID: 27032683 DOI: 10.2108/zs150103] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
With the aim of exploring phylogenetic relationships within Cypridoidea, the most species-rich superfamily among the podocopidan ostracods, we sequenced nearly the entire 18S rRNA gene (18S) and part of the 28S rRNA gene (28S) for 22 species in the order Podocopida, with representatives from all the major cypridoid families. We conducted phylogenetic analyses using the methods of maximum likelihood, minimum evolution, and Bayesian analysis. Our analyses showed monophyly for Cyprididae, one of the four families currently recognized in Cypridoidea. Candonidae turned out to be paraphyletic, and included three clades corresponding to the subfamilies Candoninae, Paracypridinae, and Cyclocypridinae. We propose restricting the name Candonidae s. str. to comprise what is now Candoninae, and raising Paracypridinae and Cyclocyprininae to family rank within the superfamily Cypridoidea.
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Affiliation(s)
- Shimpei F Hiruta
- 1 Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | | | - Toru Katoh
- 1 Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hiroshi Kajihara
- 1 Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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17
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Izumitani HF, Kusaka Y, Koshikawa S, Toda MJ, Katoh T. Phylogeography of the Subgenus Drosophila (Diptera: Drosophilidae): Evolutionary History of Faunal Divergence between the Old and the New Worlds. PLoS One 2016; 11:e0160051. [PMID: 27462734 PMCID: PMC4962979 DOI: 10.1371/journal.pone.0160051] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 07/13/2016] [Indexed: 11/19/2022] Open
Abstract
The current subgenus Drosophila (the traditional immigrans-tripunctata radiation) includes major elements of temperate drosophilid faunas in the northern hemisphere. Despite previous molecular phylogenetic analyses, the phylogeny of the subgenus Drosophila has not fully been resolved: the resulting trees have more or less varied in topology. One possible factor for such ambiguous results is taxon-sampling that has been biased towards New World species in previous studies. In this study, taxon sampling was balanced between Old and New World species, and phylogenetic relationships among 45 ingroup species selected from ten core species groups of the subgenus Drosophila were analyzed using nucleotide sequences of three nuclear and two mitochondrial genes. Based on the resulting phylogenetic tree, ancestral distributions and divergence times were estimated for each clade to test Throckmorton’s hypothesis that there was a primary, early-Oligocene disjunction of tropical faunas and a subsequent mid-Miocene disjunction of temperate faunas between the Old and the New Worlds that occurred in parallel in separate lineages of the Drosophilidae. Our results substantially support Throckmorton’s hypothesis of ancestral migrations via the Bering Land Bridge mainly from the Old to the New World, and subsequent vicariant divergence of descendants between the two Worlds occurred in parallel among different lineages of the subgenus Drosophila. However, our results also indicate that these events took place multiple times over a wider time range than Throckmorton proposed, from the late Oligocene to the Pliocene.
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Affiliation(s)
- Hiroyuki F. Izumitani
- Department of Natural History Science, Graduate school of Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yohei Kusaka
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Shigeyuki Koshikawa
- The Hakubi Center for Advanced Research and Graduate School of Science, Kyoto University, Kyoto, Kyoto, Japan
| | - Masanori J. Toda
- Hokkaido University Museum, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Toru Katoh
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Hokkaido, Japan
- * E-mail:
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18
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Itoh M, Okawa Y, Kobayashi H, Ohno T, Okamotot Y, Katoh T. The Effect of the Thermal History on the Gelation of Gelatin solution. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/00223638.1994.11738542] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Takahashi N, Murata H, Kitami H, Mitsubori H, Sakuraba J, Soga T, Aoki Y, Katoh T. Development of a microwave ion source for ion implantations. Rev Sci Instrum 2016; 87:02C108. [PMID: 26932118 DOI: 10.1063/1.4935014] [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] [Indexed: 06/05/2023]
Abstract
A microwave ion source is expected to have a long lifetime, as it has fewer consumables. Thus, we are in the process of developing a microwave ion source for ion implantation applications. In this paper, we report on a newly developed plasma chamber and the extracted P(+) beam currents. The volume of the plasma chamber is optimized by varying the length of a boron nitride block installed within the chamber. The extracted P(+) beam current is more than 30 mA, at a 25 kV acceleration voltage, using PH3 gas.
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Affiliation(s)
- N Takahashi
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - H Murata
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - H Kitami
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - H Mitsubori
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - J Sakuraba
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - T Soga
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - Y Aoki
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
| | - T Katoh
- Technology Research Center, Sumitomo Heavy Industries Ltd., Yokosuka, Kanagawa 237-8555, Japan
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20
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Saijo K, Narita K, Katoh T, Ishioka C. 6P In vivo antitumor activity of FK-A11, a depsipeptide analog targeting both histone deacetylase and phosphoinositide 3-kinase. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv517.06] [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: 11/12/2022] Open
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21
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Katoh T, Koji S, Ishida TA, Matsubayashi KW, Kahono S, Kobayashi N, Furukawa K, Viet BT, Vasconcellos-Neto J, Lange CN, Goergen G, Nakano S, Li NN, Yu GY, Katakura H. Phylogeny of epilachna, henosepilachna, and some minor genera of phytophagous ladybird beetles (coleoptera: coccinellidae: coccinellinae: epilachnini), with an analysis of ancestral biogeography and host-plant utilization. Zoolog Sci 2014; 31:820-30. [PMID: 25483794 DOI: 10.2108/zs140088] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Ladybird beetles in the tribe Epilachnini include notorious crop pests and model species studied intensively in various fields of evolutionary biology. From a combined dataset of mitochondrial (ND2) and nuclear (28S) DNA sequences, we reconstructed the phylogeny of 46 species of Epilachnini from Asia, Africa, America, and the Australian region: 16 species in Epilachna, 24 species in Henosepilachna, and one species each in Adira, Afidenta, Afidentula, Afissula, Chnootriba, and Epiverta. In our phylogenetic trees, both Epilachna and Henosepilachna were reciprocally polyphyletic. Asian Epilachna species were monophyletic, except for the inclusion of Afissula sp. Asian and Australian Henosepilachna species likewise formed a monophyletic group, excluding H. boisduvali. African Epilachna and Henosepilachna species did not group with their respective Asian and American congeners, but were paraphyletic to other clades (Epilachna species) or formed a separate monophyletic group (Henosepilachna species) together with Chnootriba similis. The American Epilachna species were monophyletic and formed a clade with American Adira clarkii and Asian Afidentula manderstjernae bielawskii; this clade was the sister group to Asian and Australian Henosepilachna, but was distant from Asian Epilachna. Chnootriba was embedded in the African Henosepilachna clade, and Afissula in the Asian Epilachna clade. Epiverta, which is morphologically unique, was the sister group to Asian Epilachna, although with weak support. From reconstructions of biogeographical distribution and host-plant utilization at ancestral nodes, we inferred an African origin for the common ancestor of the species studied, and found the frequency of host shifts to differ greatly between the two major lineages of Epilachnini examined.
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Affiliation(s)
- Toru Katoh
- 1 Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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Sato H, Suzuki Y, Ide M, Katoh T, Noda S, Ando K, Oike T, Yoshimoto Y, Okonogi N, Mimura K, Asao T, Kuwano H, Takashi N. HLA Class I Expression and Its Alteration by Preoperative Hyperthermo-Chemoradiation Therapy in Patients With Rectal Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1248] [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: 11/24/2022]
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Hirose M, Fukiage R, Katoh T, Kajihara H. Description and molecular phylogeny of a new species of Phoronis (Phoronida) from Japan, with a redescription of topotypes of P. ijimai Oka, 1897. Zookeys 2014:1-31. [PMID: 24715799 PMCID: PMC3978224 DOI: 10.3897/zookeys.398.5176] [Citation(s) in RCA: 13] [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: 03/20/2013] [Accepted: 02/12/2014] [Indexed: 11/12/2022] Open
Abstract
We describe Phoronis emigisp. n. as the eighth member of the genus based on specimens collected from a sandy bottom at 33.2 m depth in Tomioka Bay, Amakusa, Japan. The new species is morphologically similar to P. psammophila Cori, 1889, but can be distinguished from the latter by the number of longitudinal muscle bundles in the body wall (56–72 vs. 25–50 in P. psammophila) and the position of the nephridiopores (situated level with the anus vs. lower than the anus in P. psammophila). Using sequences of the nuclear 18S and 28S rRNA genes and the mitochondrial cytochrome c oxidase subunit I (COI) gene, we inferred the relationship of P. emigi to other phoronids by the maximum likelihood method and Bayesian analysis. The analyses showed that P. emigi is closely related to P. hippocrepia Wright, 1856 and P. psammophila Cori, 1889. We describe the morphology of the topotypes and additional material for P. ijimai Oka, 1897. Neither our morphological observations of P. ijimai, nor the phylogenetic analyses based on 18S and COI sequences, contradicts that P. vancouverensis Pixell, 1912 is conspecific with P. ijimai, a synonymy that has long been disputed.
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Affiliation(s)
- Masato Hirose
- Coastal Ecosystem Restoration, International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8564, Chiba, Japan
| | - Ryuma Fukiage
- Laboratory of Dead Body Science, Graduate School of Science, The University of Tokyo, Bunkyo-ku 113-0033, Tokyo, Japan
| | - Toru Katoh
- Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
| | - Hiroshi Kajihara
- Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Hokkaido, Japan
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Tateno Y, Komiyama T, Katoh T, Munkhbat B, Oka A, Haida Y, Kobayashi H, Tamiya G, Inoko H. Divergence of East Asians and Europeans estimated using male- and female-specific genetic markers. Genome Biol Evol 2014; 6:466-73. [PMID: 24589501 PMCID: PMC3971580 DOI: 10.1093/gbe/evu027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 12/29/2022] Open
Abstract
To study the male and female lineages of East Asian and European humans, we have sequenced 25 short tandem repeat markers on 453 Y-chromosomes and collected sequences of 72 complete mitochondrial genomes to construct independent phylogenetic trees for male and female lineages. The results indicate that East Asian individuals fall into two clades, one that includes East Asian individuals only and a second that contains East Asian and European individuals. Surprisingly, the European individuals did not form an independent clade, but branched within in the East Asians. We then estimated the divergence time of the root of the European clade as ∼41,000 years ago. These data indicate that, contrary to traditional views, Europeans diverged from East Asians around that time. We also address the origin of the Ainu lineage in northern Japan.
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Affiliation(s)
- Yoshio Tateno
- School of New Biology, Daegu Gyoungbuk Institute of Science and Technology, Daegu, Republic of Korea
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Takahashi N, Murata H, Mitsubori H, Sakuraba J, Soga T, Aoki Y, Katoh T, Saitoh Y, Yamada K, Ikenaga N, Sakudo N. Development of microwave ion source for industrial applications. Rev Sci Instrum 2014; 85:02C306. [PMID: 24593643 DOI: 10.1063/1.4826675] [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] [Indexed: 06/03/2023]
Abstract
A microwave ion source is one of the long-life ion sources. In this paper, we report on the characteristics of the extracted Ar ion beam produced by a microwave ion source under various conditions, in terms of magnetic flux distribution and mass flow, and the stability of the ion beam. The measured spectra show that, under the experimental condition, almost all of produced ions were Ar(+) ions. For more than 6 h, the ion beam was stable.
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Affiliation(s)
- N Takahashi
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - H Murata
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - H Mitsubori
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - J Sakuraba
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - T Soga
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - Y Aoki
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - T Katoh
- Sumitomo Heavy Industries, Ltd., 19 Natsushima-cho, Yokosuka, Kanagawa 237-8555, Japan
| | - Y Saitoh
- Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - K Yamada
- Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - N Ikenaga
- Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi, Ishikawa 921-8501, Japan
| | - N Sakudo
- Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi, Ishikawa 921-8501, Japan
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Murata H, Miyauchi Y, Katoh T, Ueno A, Yodogawa K, Iwasaki Y, Hayashi M, Tanaka K, Simizu W, Mizuno K. Clinical and electrophysiological characteristics of electrical storm of monomorphic ventricular tachycardia refractory to intravenous amiodarone. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1345] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Endo A, Katoh T, Vasudeva SB, Kobayashi I, Okano T. A preliminary study to determine the diagnostic reference level using dose-area product for limited-area cone beam CT. Dentomaxillofac Radiol 2013; 42:20120097. [PMID: 23420859 PMCID: PMC3667520 DOI: 10.1259/dmfr.20120097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 07/27/2012] [Accepted: 08/01/2012] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVES The aim of this study was to measure the dose-area product (DAP) of limited-area cone beam CT (CBCT) units used by dental offices, and to evaluate the rationale of the DAP with an aid of optically stimulated luminescence (OSL) dosemeter in measuring radiation dose. METHOD The DAPs of 21 CBCT units used in the dental offices of Tokyo and the surrounding areas from five different manufacturers were measured using OSL nanoDot dosemeter. An assembly of OSL dosemeters with an X-ray film was exposed by CBCT units at exposure parameters commonly used in each dental office. DAP values were then calculated as expressed in mGy cm(2). RESULTS DAP values ranged from 126.7 mGy cm(2) to 1476.9 mGy cm(2), depending on the units used. CONCLUSION OSL dosemeter coupled with film can be utilized for a large-scale study to measure DAP. The DAP values for individual CBCT units depend not only on the field of view, but also on the exposure parameters adapted by the dental offices.
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Affiliation(s)
- A Endo
- Department of Radiology, Showa University School of Dentistry, Tokyo, Japan
- Department of Radiological Sciences, Graduate School of Human Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - T Katoh
- Department of Radiological Sciences, Graduate School of Human Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - SB Vasudeva
- Department of Radiology, Showa University School of Dentistry, Tokyo, Japan
| | | | - T Okano
- Department of Radiology, Showa University School of Dentistry, Tokyo, Japan
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Manabe N, Haruma K, Ito M, Takahashi N, Takasugi H, Wada Y, Nakata H, Katoh T, Miyamoto M, Tanaka S. Efficacy of adding sodium alginate to omeprazole in patients with nonerosive reflux disease: a randomized clinical trial. Dis Esophagus 2012; 25:373-80. [PMID: 22050449 DOI: 10.1111/j.1442-2050.2011.01276.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [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: 12/11/2022]
Abstract
Nonerosive reflux disease (NERD) is the most common form of gastroesophageal reflux disease. Patients with NERD have a lower response rate to proton pump inhibitors (PPIs) than patients with erosive esophagitis when gauged from relief of heartburn. Sodium alginate decreases the acidity of refluxate and protects the esophageal mucosa. However, whether the addition of sodium alginate to PPI therapy can improve NERD symptoms remains unknown. Accordingly, the aim of this study was to evaluate the efficacy of adding sodium alginate to basal PPI therapy for NERD. Patients who had experienced heartburn on at least 2 days per week during the 1-month period before entering the study and had no endoscopic mucosal breaks (grade M or N according to Hoshihara's modification of the Los Angeles classification) were randomized to one of two treatments for 4 weeks: omeprazole (20 mg once daily) plus sodium alginate (30 mL four times a day) (group A) or omeprazole (20 mg once daily) alone (group B). Eighty-seven patients were enrolled, and 76 patients were randomly assigned to group A (n = 36) or group B (n = 40). Complete resolution of heartburn for at least 7 consecutive days by the end of treatment was significantly more common in group A (56.7%) than in group B (25.7%). One patient from group A had mild drug-related diarrhea that was not clinically serious. In conclusion, omeprazole combined with sodium alginate was better than omeprazole alone in Japanese patients with NERD.
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Affiliation(s)
- N Manabe
- Division of Endoscopy and Ultrasonography, Department of Clinical Pathology and Laboratory Medicine, Kawasaki Medical School, Kurashiki, Japan.
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Yoshihara T, Hiruta SF, Katoh T, Kajihara H. Three species of Amphicorina (Annelida, Sabellida, Sabellidae) from Japan, with descriptions of two new species. Zookeys 2012; 187:45-62. [PMID: 22577329 PMCID: PMC3345902 DOI: 10.3897/zookeys.187.2662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 04/17/2012] [Indexed: 11/25/2022] Open
Abstract
We describe two new species and redescribe one in the polychaete genus Amphicorina Claparède, 1864 (Sabellidae) from Hokkaido, Japan. Amphicorina ascidicolasp. n. differs from its 38 congeners chiefly in the reduction of the collar, but also in having three pairs of radioles, one pair of ventral radiolar appendages, a bifurcate ventral lobe on the anterior peristomial ring, six abdominal chaetigers, and a large anterior tooth on the abdominal uncini. Amphicorina ezoensissp. n. has a crenulated collar, three pairs of radioles, and more than eight (12) abdominal chaetigers; Amphicorina ezoensis shares these character states with Amphicorina anneae (Rouse, 1994), Amphicorina eimeri (Langerhans, 1880), and Amphicorina persinosa (Ben-Eliahu, 1975), but differs from them in having two pairs of ventral radiolar appendages and a non-oblique collar. Amphicorina mobilis (Rouse, 1990) was previously known only from the type locality (New South Wales, Australia), but we identify our Japanese material as conspecific on the basis of morphological and molecular similarity.
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Affiliation(s)
- Taiki Yoshihara
- Laboratory of Systematics and Evolution, Department of Natural History Sciences, Hokkaido University, N10 W8, Sapporo 060-0810, Japan
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Endo A, Katoh T, Kobayashi I, Joshi R, Sur J, Okano T. Characterization of optically stimulated luminescence dosemeters to measure organ doses in diagnostic radiology. Dentomaxillofac Radiol 2012; 41:211-6. [PMID: 22116136 PMCID: PMC3520283 DOI: 10.1259/dmfr/98708146] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 01/26/2011] [Accepted: 02/03/2011] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The aim of this study was to assess the characteristics of an optically stimulated luminescence dosemeter (OSLD) for use in diagnostic radiology and to apply the OSLD in measuring the organ doses by panoramic radiography. METHODS The dose linearity, energy dependency and angular dependency of aluminium oxide-based OSLDs were examined using an X-ray generator to simulate various exposure settings in diagnostic radiology. The organ doses were then measured by inserting the dosemeters into an anthropomorphic phantom while using three panoramic machines. RESULTS The dosemeters demonstrated consistent dose linearity (coefficient of variation<1.5%) and no significant energy dependency (coefficient of variation<1.5%) under the applied exposure conditions. They also exhibited negligible angular dependency (≤ 10%). The organ doses of the X-ray as a result of panoramic imaging by three machines were calculated using the dosemeters. CONCLUSION OSLDs can be utilized to measure the organ doses in diagnostic radiology. The availability of these dosemeters in strip form proves to be reliably advantageous.
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Affiliation(s)
- A Endo
- Department of Radiology, Showa University Dental Hospital, Ota-ku, Tokyo, Japan
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - T Katoh
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | | | - R Joshi
- Department of Radiology, Showa University Dental Hospital, Ota-ku, Tokyo, Japan
| | - J Sur
- Department of Radiology, Showa University Dental Hospital, Ota-ku, Tokyo, Japan
| | - T Okano
- Department of Radiology, Showa University Dental Hospital, Ota-ku, Tokyo, Japan
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Kakui K, Katoh T, Hiruta SF, Kobayashi N, Kajihara H. Molecular Systematics of Tanaidacea (Crustacea: Peracarida) Based on 18S Sequence Data, with an Amendment of Suborder/Superfamily-Level Classification. Zoolog Sci 2011; 28:749-57. [DOI: 10.2108/zsj.28.749] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Gao JJ, Hu YG, Toda MJ, Katoh T, Tamura K. Phylogenetic relationships between Sophophora and Lordiphosa, with proposition of a hypothesis on the vicariant divergences of tropical lineages between the Old and New Worlds in the family Drosophilidae. Mol Phylogenet Evol 2011; 60:98-107. [DOI: 10.1016/j.ympev.2011.04.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 04/11/2011] [Accepted: 04/18/2011] [Indexed: 10/18/2022]
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Yamashita T, Inoue H, Okumura K, Kodama I, Aizawa Y, Atarashi H, Ohe T, Ohtsu H, Kato T, Kamakura S, Kumagai K, Kurachi Y, Koretsune Y, Saikawa T, Sakurai M, Sato T, Sugi K, Nakaya H, Hirai M, Hirayama A, Fukatani M, Mitamura H, Yamazaki T, Watanabe E, Ogawa S, Katoh T, Igawa O, Matsumoto N, Yamashita T, Kaneko Y, Watanabe E, Ogawa S, Osaka T, Fujii E, Niwano S, Yoshioka K, Kato M, Okazaki O, Kusano K, Okuyama Y, Furushima H, Suzuki M, Noda T, Kawara T, Sato T, Kamakura S, Endoh Y, Kumagai K, Hiyoshi Y, Ishiyama T, Ohtsuka T, Matsumoto M, Chishaki A, Shinohara T, Shirayama T, Koretsune Y, Yokoyama E, Ajiki K, Fujio K, Sugi K, Yamakawa T, Yusu S, Inoue H, Kawamura Y, Hayano M, Date T, Mizusawa Y, Kobayashi Y, Satomi K, Imai Y, Atarashi H, Fukunami M, Yokoshiki H, Betsuyaku T, Okumura K, Takeda H, Matsumoto K, Okishige K, Tagawa M, Hirai M, Okazaki H. Randomized trial of angiotensin II-receptor blocker vs. dihydropiridine calcium channel blocker in the treatment of paroxysmal atrial fibrillation with hypertension (J-RHYTHM II Study). Europace 2010; 13:473-9. [DOI: 10.1093/europace/euq439] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Imai H, Nakao H, Shinohara H, Fujii Y, Tsukino H, Hamasuna R, Osada Y, Fukushima K, Inamori M, Ikenoue T, Katoh T. Population-based study of asymptomatic infection with Chlamydia trachomatis among female and male students. Int J STD AIDS 2010; 21:362-6. [PMID: 20498109 DOI: 10.1258/ijsa.2010.010026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
There are few epidemiological studies of asymptomatic chlamydial infection among students in non-medical settings with minimal bias and improved accuracy; thus, useful data from screening among students are limited. We aimed to obtain accurate epidemiological information about asymptomatic chlamydial infection among students in non-medical settings. A population-based cross-sectional survey of 10,440 >or=18-year-old asymptomatic students who volunteered for a urine screening test for chlamydia was conducted. The prevalences of asymptomatic infection were 9.5% for women and 6.7% for men. Multivariate analysis revealed the risk factors to be a lifetime history of >or=4 sexual partners for women (odds ratio [OR] 3.17) and inconsistent condom use for men (OR 4.18). For both sexes, younger age at first intercourse was associated with a higher rate of inconsistent condom use. This study produced accurate epidemiological information on asymptomatic chlamydial infection. These results may contribute to the establishment of preventive countermeasures against such infection.
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Affiliation(s)
- Hirohisa Imai
- Department of Epidemiology, National Institute of Public Health, Wako-shi, Saitama 351-0197, Japan.
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Abstract
Living blue-green algae (Mastigocladus laminosus), immobilized on an SnO(2) optically transparent electrode with calcium alginate, functioned as an anodic photoelectrode on continuous illumination for periods of time adequate for use in a conventional electrochemical cell. This "living electrode" shows promise of use as a long-lived photoconverter of solar radiant energy to electric energy and as a suitable replacement for unstable chloroplast systems.
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Affiliation(s)
- H Ochiai
- Laboratory of Biochemistry, College of Agriculture, Shimane University, Nishikawazu, Matsue, 690 Japan
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Matsuoka T, Kobayashi S, Oka K, Sakano H, Kawano K, Katoh T. [Thymic cancer with superior vena cava invasion reconstructed by ready-made Y-graft]. Kyobu Geka 2010; 63:379-381. [PMID: 20446606] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A 57-year-old woman was admitted to our hospital with a complaint of left supraclavicular lymph node's swelling in January 2007. Computed tomography (CT) showed the lobulated tumor suspected of superior vena cava (SVC) invasion, located in the anterior mediastinum, 5 x 3 cm in size. The patient underwent thymectomy, resection of SVC, and partial resection of the right upper lobe. SVC was reconstructed by ready-made Y-graft (Hemashied phi 18 x 9 mm). Histopathological diagnosis was thymic cancer, poorly differentiated squamous cell carcinoma. The patient was discharged on 21st postoperative day. Postoperative radiotherapy (RT : 12.6 Gy) was canceled for the side effect. Alternatively, adjuvant chemotherapy [carboplatin (CBDCA) +paclitaxel (PTX)] was administered. Additional RT (50 Gy) was given to the lesion of local recurrence 1 and half year after the operation. The patient was alive without any signs of recurrence after RT. Left side bypass graft was patent at 8 months postoperatively, but was obliterated thereafter. Right side bypass is patent at more than 2 years postoperatively. Ready-made Y-graft can be one of the choices of SVC reconstruction.
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Affiliation(s)
- T Matsuoka
- Department of Surgery, Yamaguchi Rosai Hospital, Sanyouonoda, Japan
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Ito N, Katoh T, Kobayashi N, Katakura H. Effects of Straits as Dispersal Barriers for the Flightless Roving Carrion Beetle,Silpha perforata(Coleoptera, Silphidae, Silphinae). Zoolog Sci 2010; 27:313-9. [DOI: 10.2108/zsj.27.313] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kobayashi N, Ohta Y, Katoh T, Kahono S, Hartini S, Katakura H. Molecular phylogenetic analysis of three groups of Asian epilachnine ladybird beetles recognized by the female internal reproductive organs and modes of sperm transfer. J NAT HIST 2009. [DOI: 10.1080/00222930902968817] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tokumura M, Katoh H, Katoh T, Znad HT, Kawase Y. Solubilization of excess sludge in activated sludge process using the solar photo-Fenton reaction. J Hazard Mater 2009; 162:1390-1396. [PMID: 18639985 DOI: 10.1016/j.jhazmat.2008.06.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Revised: 06/03/2008] [Accepted: 06/06/2008] [Indexed: 05/26/2023]
Abstract
The solubilization of excess sludge by the solar photo-Fenton reaction has been investigated for the reduction of excess sludge in the activated sludge process. The solubilization kinetics depended on the dosages of the Fenton reagents, Fe and H(2)O(2). Increases of initial Fe and H(2)O(2) concentrations in their ranges studied in this work continuously enhanced the sludge solubilization. Cell lysis by the photo-Fenton reaction caused the increase in dissolved chemical oxygen demand (COD) in the first step of sludge solubilization. The further oxidative decomposition of the discharged organic compounds by the photo-Fenton reaction led to the decrease in the dissolved COD as the second step of sludge solubilization. The increase of dissolved COD in the first step of sludge solubilization and the consumption of H(2)O(2) could be described by the pseudo-zero order kinetics based on the accumulated light energy. About 40% reduction of mixed-liquor suspended solids (MLSS) by the solar photo-Fenton reaction was found. It was found that solar light used as a light energy source instead of costly and hazardous artificial UV light was very effective. The dissolved COD for solar photo-Fenton reaction increased faster and by 1.5 times as compared with that by artificial UV light.
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Affiliation(s)
- M Tokumura
- Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
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Abstract
This paper reports the case of a 76-year-old man in whom atrial flutter with varying atrioventricular block and intermittent right bundle-branch block was found. This is the first report on tachycardia-dependent right bundle-branch block associated with supernormal conduction in a case of atrial flutter. When an impulse is conducted to the ventricles beyond 0.72 s after a QRS complex of right bundle-branch block configuration, the impulse falls after the abnormally long effective refractor period of the right bundle branch and passes through the right bundle branch. When the conducted impulse occurs within 0.72 s after a QRS complex of right bundle-branch block configuration, the impulse usually falls in the refractory period and is blocked in the right bundle branch; however, only when the impulse occurs 0.48 or 0.49 s after that does it fall in the supernormal period and passes through the right bundle branch. The findings in the present report strengthen our previous suggestion that the presence of supernormal conduction plays an important role in the initiation of reentrant ventricular tachycardia.
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Affiliation(s)
- T Katoh
- Katoh Cardiovascular Clinic, Ohtsu, Japan
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Boccia S, Hashibe M, Gallì P, De Feo E, Asakage T, Hiraki A, Katoh T, Yokoyama A, Ricciardi G, Boffetta P. Alcohol drinking and head and neck cancer: a meta-analysis on aldehyde dehydrogenase-2 evidence a causal relationship from mendelian randomisation. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71889-5] [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: 11/15/2022] Open
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Katoh T, Nakaya D, Tamura K, Aotsuka T. Phylogeny of the Drosophila immigrans species group (Diptera: Drosophilidae) based on Adh and Gpdh sequences. Zoolog Sci 2008; 24:913-21. [PMID: 17960997 DOI: 10.2108/zsj.24.913] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2007] [Accepted: 05/12/2007] [Indexed: 11/17/2022]
Abstract
The immigrans species group in the Drosophilinae is one of the representative species groups of Drosophila in East Asia. Although this group constitutes a significant part of the drosophilid fauna in the Old World, only a few species have been analyzed in previous molecular phylogenetic studies. To study the phylogeny of the immigrans group, we analyzed the nucleotide sequences of two nuclear genes, alcohol dehydrogenase (Adh) and glycerol-3-phosphate dehydrogenase (Gpdh), for 36 drosophilid species, including 12 species of the immigrans group. In the resultant phylogenetic trees, 10 species of the immigrans group (D. immigrans, D. formosana, D. ruberrima, D. albomicans, D. nasuta, D. neonasuta, D. pallidifrons, D. hypocausta, D. neohypocausta, D. siamana) consistently formed a clade (the immigrans group proper), although the phylogeny within this clade did not exactly correspond to the classification of species subgroups. However, D. annulipes and D. quadrilineata, both of which belong to the quadrilineata subgroup of the immigrans group, were not included in the immigrans group proper. Furthermore, we obtained the unexpected result that D. annulipes was included in a clade comprising Scaptomyza and Hawaiian Drosophila, together with D. maculinotata of the funebris group, although the phylogenetic relationships within this clade remain uncertain and need to be substantiated with further studies. Thus, according to the present study, the immigrans group is polyphyletic.
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Affiliation(s)
- Toru Katoh
- COE for Neo-Science of Natural History, Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo 060-0810, Japan.
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Jinno K, Takeuchi T, Amemiya S, Katoh T. The Rapid and Non-Destructive Determination of Vanadium in Carbons by the Neutron Activation Analysis Using Gadolinium as an Internal Standard Material. ANAL LETT 2006. [DOI: 10.1080/00032717908055702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Owada K, Katoh T, Asano K, Watanabe K, Shigetomi S, Watanabe T. Successful pregnancy complicated by microscopic polyarteritis nodosa. Clin Nephrol 2005; 63:500-2. [PMID: 15960155 DOI: 10.5414/cnp63500] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Katoh T, Mano S, Munkhbat B, Tounai K, Oyungerel G, Chae GT, Han H, Jia GJ, Tokunaga K, Munkhtuvshin N, Tamiya G, Inoko H. Genetic features of Khoton Mongolians revealed by SNP analysis of the X chromosome. Gene 2005; 357:95-102. [PMID: 16125340 DOI: 10.1016/j.gene.2005.06.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2005] [Revised: 05/30/2005] [Accepted: 06/16/2005] [Indexed: 11/23/2022]
Abstract
The Khoton Mongolian population is a small and relatively isolated ethnic group residing predominantly in the northwestern part of Mongolia. A recent genetic study of the Y chromosome revealed that the major Mongolian ethnic groups have a relatively close genetic affinity to populations in the northern part of East Asia, while the Khoton population reflected an apparent genetic differentiation from the other Mongolian populations. To further investigate the genetic features of the Khoton and the other Mongolian populations, we analyzed the single nucleotide polymorphisms (SNPs) in the Xq13.3 region, which is thought to have an extremely low level of recombination in the human X chromosome. We found that the frequency distribution of Xq13.3 haplotypes in the Khoton population was substantially different from those in three other Mongolian populations (Khalkh, Uriankhai, and Zakhchin). The same relationship was also revealed by the results from the population tree and principal-component (PC) analysis based on the allele frequencies. These results are largely consistent with the hypothesis that the Khoton population descended from a nomadic tribe of Turkish origin, which has been supported by previous anthropological, historical, and Y-chromosome studies. However, the population structure analysis produced an additional finding, namely, that the Khoton population is likely to be an admixed population.
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Affiliation(s)
- Toru Katoh
- Molecular Life Science, School of Medicine, Tokai University, Bohseidai, Isehara, Kanagawa, 259-1193, Japan
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Sakuma Y, Katoh T, Owada K, Suzuki H, Sakurai K, Eiro M, Asahi K, Watanabe T. Initial functional status predicts infections during steroid therapy for renal diseases. Clin Nephrol 2005; 63:68-73. [PMID: 15730047 DOI: 10.5414/cnp63068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND AND AIM Corticosteroid therapy is an effective way of treatment for many renal diseases, however, it is sometimes associated with infections. Our aim is to identify useful predictive markers of infection during steroid therapy. METHODS We examined 121 patients (M/F = 71/50, mean age 43.8, range 15 - 82 years) who were treated with corticosteroids (IgA nephropathy in 51, minimal-change disease in 17, membranous nephropathy in 16 rapidly progressive glomerulonephritis (RPGN) in 13, lupus nephritis in 12 and other disorders in 12). Karnofsky's performance score (KPS) was employed to assess the physical functional status at the time of diagnosis. Infections were defined as conditions that required more than 1-week care, and those that caused the patient's death. RESULTS Nineteen patients (15.7%) had infections during treatment. A logistic multivariate analysis showed significant correlations between infection and the use of immunosuppressive agents (relative risk RR = 7.7, p = 0.0265), ages of 52.9 years or more (RR = 13.5, p = 0.0026), initial number of lymphocytes (Lym) less than 1.250/microl (RR = 14.2, p = 0.0011), and KPS less than 77.4 (RR = 12.1, p = 0.0020). All correlations with infection were independent of all the other variables listed above. CONCLUSION KPS, along with age, Lym and the use of immunosuppressive agents, are useful for the prediction of infectious complications during steroid therapy.
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Affiliation(s)
- Y Sakuma
- Department of Internal Medicine II, Fukushima Medical University School of Medicine, Fukushima, Japan
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Tsukino H, Nakao H, Kuroda Y, Imai H, Inatomi H, Osada Y, Katoh T. Glutathione S-transferase (GST) M1, T1 and N-acetyltransferase 2 (NAT2) polymorphisms and urothelial cancer risk with tobacco smoking. Eur J Cancer Prev 2005; 13:509-14. [PMID: 15548945 DOI: 10.1097/00008469-200412000-00008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The objective of this study was to examine the association between the genetic polymorphism of glutathione S-transferase (GST) M1, T1 and N-acetyltransferase 2 (NAT2) genes and urothelial cancer risk in relation to smoking status. In this study, 325 Japanese patients with urothelial transitional cell carcinoma and 325 healthy controls were compared for frequencies of GSTM1, T1 and NAT2 genotypes. The frequencies of GSTM1 null genotype and NAT2 slow genotype were significantly higher in the cases than in the controls (adjusted odds ratio (OR) 1.37, 95% confidence interval (CI) 1.01-1.87, adjusted OR 3.09, 95% CI 1.69-5.63, individually). Furthermore, the risk of GSTM1 null genotype and NAT2 slow genotype was higher among smokers (adjusted OR 1.48, 95% CI 1.01-2.15, adjusted OR 4.28, 95% CI 1.96-9.36, individually). The regression analysis of cancer risk as a function of the amount of smoking showed that the susceptibility of people who had GSTM1 null genotype increased from 45 pack-years, while the susceptibility of people with NAT2 intermediate or slow genotype increased rapidly from 25 pack-years, compared with non-smokers. A multiplicative interaction between NAT2 intermediate or slow genotype and pack-years of smoking was found (P<0.001), but GSTM1 null genotype was not (P=0.06). Our results indicate that the GSTM1 null genotype and NAT2 intermediate or slow genotype are associated with an increased risk of urothelial cancer in relation to smoking amounts. Furthermore, the interaction between NAT2 intermediate or slow genotype and pack-years of smoking has a strong impact on urothelial cancer.
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Affiliation(s)
- H Tsukino
- Department of Public Health, Miyazaki Medical College, University of Miyazaki, 5200 Kihara, Miyazaki 889-1692, Japan
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Katoh T, Chichvarkhin A, Yagi T, Omoto K. Phylogeny and Evolution of Butterflies of the Genus Parnassius: Inferences from Mitochondrial 16S and ND1 Sequences. Zoolog Sci 2005; 22:343-51. [PMID: 15795497 DOI: 10.2108/zsj.22.343] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Phylogenetic relationships among species of the genus Parnassius and its related taxa were analyzed by comparing nucleotide sequences of mitochondrial 16S ribosomal RNA (504 sites) and NADH-dehydrogenase subunit 1 (469 sites). In the phylogenetic trees, Parnassius was found to be most closely related to Hypermnestra helios, whereas Archon apollinus, which has been classified in the tribe Parnassiini together with Parnassius and Hypermnestra, was more closely related to members of the tribe Zerynthiini. Within the Parnassius clade, six major clades corresponding to species groups were well supported, although the phylogenetic relationships among them were not clear. Although the results of the present study were in agreement with those of a previous phylogenetic study based on mitochondrial NADH-dehydrogenase subunit 5 sequences, our study strongly supported a close relationship between Parnassius and Hypermnestra, which was not well supported in the previous study.
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Affiliation(s)
- Toru Katoh
- COE for Neo-Science of Natural History, Graduate School of Science, Hokkaido University, Sapporo, Japan.
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Katoh T, Munkhbat B, Tounai K, Mano S, Ando H, Oyungerel G, Chae GT, Han H, Jia GJ, Tokunaga K, Munkhtuvshin N, Tamiya G, Inoko H. Genetic features of Mongolian ethnic groups revealed by Y-chromosomal analysis. Gene 2005; 346:63-70. [PMID: 15716011 DOI: 10.1016/j.gene.2004.10.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2004] [Revised: 10/12/2004] [Accepted: 10/21/2004] [Indexed: 11/27/2022]
Abstract
About 20 ethnic groups reside in Mongolia. On the basis of genetic and anthropological studies, it is believed that Mongolians have played a pivotal role in the peopling of Central and East Asia. However, the genetic relationships among these ethnic groups have remained obscure, as have their detailed relationships with adjacent populations. We analyzed 16 binary and 17 STR polymorphisms of human Y chromosome in 669 individuals from nine populations, including four indigenous ethnic groups in Mongolia (Khalkh, Uriankhai, Zakhchin, and Khoton). Among these four Mongolian populations, the Khalkh, Uriankhai, and Zakhchin populations showed relatively close genetic affinities to each other and to Siberian populations, while the Khoton population showed a closer relationship to Central Asian populations than to even the other Mongolian populations. These findings suggest that the major Mongolian ethnic groups have a close genetic affinity to populations in northern East Asia, although the genetic link between Mongolia and Central Asia is not negligible.
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Affiliation(s)
- Toru Katoh
- Molecular Life Science, School of Medicine, Tokai University, Bohseidai, Isehara, Kanagawa 259-1193, Japan
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