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Hisatomi A, Tourlousse DM, Hamajima M, Ohkuma M, Sekiguchi Y, Sakamoto M. Complete genome sequences of Ruminococcus torques strains JCM 36208 and JCM 36209, isolated from the feces of a healthy Japanese male. Microbiol Resour Announc 2023; 12:e0063223. [PMID: 37800929 PMCID: PMC10652952 DOI: 10.1128/mra.00632-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 08/25/2023] [Indexed: 10/07/2023] Open
Abstract
Here, we report the complete genome sequences of two Ruminococcus torques strains (JCM 36208 and JCM 36209) that were newly isolated from the feces of a healthy Japanese male. Both genomes consist of a single circular chromosome with a length of ~2.8 Mbp and a G+C content of 41.8%.
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Affiliation(s)
- Atsushi Hisatomi
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Dieter M. Tourlousse
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Mayu Hamajima
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Yuji Sekiguchi
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
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2
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Anda M, Yamanouchi S, Cosentino S, Sakamoto M, Ohkuma M, Takashima M, Toyoda A, Iwasaki W. Bacteria can maintain rRNA operons solely on plasmids for hundreds of millions of years. Nat Commun 2023; 14:7232. [PMID: 37963895 PMCID: PMC10645730 DOI: 10.1038/s41467-023-42681-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 10/17/2023] [Indexed: 11/16/2023] Open
Abstract
It is generally assumed that all bacteria must have at least one rRNA operon (rrn operon) on the chromosome, but some strains of the genera Aureimonas and Oecophyllibacter carry their sole rrn operon on a plasmid. However, other related strains and species have chromosomal rrn loci, suggesting that the exclusive presence of rrn operons on a plasmid is rare and unlikely to be stably maintained over long evolutionary periods. Here, we report the results of a systematic search for additional bacteria without chromosomal rrn operons. We find that at least four bacterial clades in the phyla Bacteroidota, Spirochaetota, and Pseudomonadota (Proteobacteria) lost chromosomal rrn operons independently. Remarkably, Persicobacteraceae have apparently maintained this peculiar genome organization for hundreds of millions of years. In our study, all the rrn-carrying plasmids in bacteria lacking chromosomal rrn loci possess replication initiator genes of the Rep_3 family. Furthermore, the lack of chromosomal rrn operons is associated with differences in copy numbers of rrn operons, plasmids, and chromosomal tRNA genes. Thus, our findings indicate that the absence of rrn loci in bacterial chromosomes can be stably maintained over long evolutionary periods.
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Affiliation(s)
- Mizue Anda
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Kashiwa, Chiba, 277-0882, Japan.
- Department of Biological Sciences, Graduate School of Science, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan.
| | - Shun Yamanouchi
- Department of Biological Sciences, Graduate School of Science, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Salvatore Cosentino
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Kashiwa, Chiba, 277-0882, Japan
- Department of Biological Sciences, Graduate School of Science, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Masako Takashima
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, 411-8540, Japan
| | - Wataru Iwasaki
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Kashiwa, Chiba, 277-0882, Japan.
- Department of Biological Sciences, Graduate School of Science, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan.
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, the University of Tokyo, Kashiwa, Chiba, 277-0882, Japan.
- Atmosphere and Ocean Research Institute, the University of Tokyo, Kashiwa, Chiba, 277-0882, Japan.
- Institute for Quantitative Biosciences, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan.
- Collaborative Research Institute for Innovative Microbiology, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan.
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Hisatomi A, Kastawa NWEPG, Song I, Ohkuma M, Fukiya S, Sakamoto M. Claveliimonas bilis gen. nov., sp. nov., deoxycholic acid-producing bacteria isolated from human faeces, and reclassification of Sellimonas monacensis Zenner et al. 2021 as Claveliimonas monacensis comb. nov. Int J Syst Evol Microbiol 2023; 73. [PMID: 37737068 DOI: 10.1099/ijsem.0.006030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023] Open
Abstract
Obligately anaerobic, Gram-stain-positive, bacilli, strains 12BBH14T, 9CFEGH4 and 10CPCBH12, were isolated from faecal samples of healthy Japanese people. Strain 12BBH14T showed the highest 16S rRNA gene sequence similarity to Sellimonas monacensis Cla-CZ-80T (97.5 %) and 'Lachnoclostridium phocaeense' Marseille-P3177T (97.2 %). Strain 12BBH14T was also closely related to Eubacterium sp. c-25 with 99.7 % 16S rRNA gene sequence similarity. The 16S rRNA gene sequence analysis showed that strains 12BBH14T, 9CFEGH4 and 10CPCBH12 formed a monophyletic cluster with Eubacterium sp. c-25. Near this monophyletic cluster, S. monacensis Cla-CZ-80T and 'L. phocaeense' Marseille-P3177T formed a cluster and did not form a cluster with other Sellimonas species. The digital DNA-DNA hybridization (dDDH) and average nucleotide identity (ANI) values between strains 12BBH14T, 9CFEGH4, 10CPCBH12 and Eubacterium sp. c-25 were higher than the cut-off values of species demarcation (>88 % dDDH and >98 % ANI), indicating that these four strains are the same species. On the other hand, the dDDH and ANI values of these strains were lower than the cut-off values of species demarcation against other strains (<29 % dDDH and <76 % ANI). Moreover, the average amino acid identity values among these strains were higher than the genus boundary. These results indicate that the isolates should be considered to belong to a new genus of the family Lachnospiraceae. Based on the collected data, strains 12BBH14T, 9CFEGH4 and 10CPCBH12 represent a novel species of a novel genus, for which the name Claveliimonas bilis gen. nov., sp. nov. is proposed. The type strain of C. bilis is 12BBH14T (=JCM 35899T=DSM 115701T). Eubacterium sp. c-25 belongs to C. bilis. In addition, S. monacensis is transferred to the genus Claveliimonas as Claveliimonas monacensis comb. nov.
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Affiliation(s)
- Atsushi Hisatomi
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | | | - Isaiah Song
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0052, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Satoru Fukiya
- Laboratory of Microbial Physiology, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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Kawasaki S, Ozawa K, Mori T, Yamamoto A, Ito M, Ohkuma M, Sakamoto M, Matsutani M. Symbiosis of Carpenter Bees with Uncharacterized Lactic Acid Bacteria Showing NAD Auxotrophy. Microbiol Spectr 2023; 11:e0078223. [PMID: 37347191 PMCID: PMC10433979 DOI: 10.1128/spectrum.00782-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 05/30/2023] [Indexed: 06/23/2023] Open
Abstract
Eusocial bees (such as honey bees and bumble bees) harbor core gut microbiomes that are transmitted through social interaction between nestmates. Carpenter bees are not eusocial; however, recent microbiome analyses found that Xylocopa species harbor distinctive core gut microbiomes. In this study, we analyzed the gut microbiomes of three Xylocopa species in Japan between 2016 and 2021 by V1 to V2 region-based 16S rDNA amplicon sequencing, and 14 candidate novel species were detected based on the full-length 16S rRNA gene sequences. All Xylocopa species harbor core gut microbiomes consisting of primarily lactic acid bacteria (LAB) that were phylogenetically distant from known species. Although they were difficult to cultivate, two LAB species from two different Xylocopa species were isolated by supplementing bacterial culture supernatants. Both genomes exhibited an average LAB genome size with a large set of genes for carbohydrate utilization but lacked genes to synthesize an essential coenzyme NAD, which is unique among known insect symbionts. Our findings of phylogenetically distinct core LAB of NAD auxotrophy reflected the evolution of Xylocopa-restricted bacteria retention and maintenance through vertical transmission of microbes during solitary life. We propose five candidate novel species belonging to the families Lactobacillaceae and Bifidobacteriaceae, including a novel genus, and their potential functions in carbohydrate utilization. IMPORTANCE Recent investigations found unique microbiomes in carpenter bees, but the description of individual microbes, including isolation and genomics, remains largely unknown. Here, we found that the Japanese Xylocopa species also harbor core gut microbiomes. Although most of them were difficult to isolate a pure colony, we successfully isolated several strains. We performed whole-genome sequencing of the isolated candidate novel species and found that the two Lactobacillaceae strains belonging to the Xylocopa-specific novel LAB clade lack the genes for synthesizing NAD, a coenzyme central to metabolism in all living organisms. Here, we propose a novel genus for the two LAB species based on very low 16S rRNA gene sequence similarities and genotypic characters.
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Affiliation(s)
- Shinji Kawasaki
- Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Kaori Ozawa
- Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Tatsunori Mori
- Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Arisa Yamamoto
- Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Midoriko Ito
- Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Minenosuke Matsutani
- NODAI Genome Research Center, Research Institute, Tokyo University of Agriculture, Tokyo, Japan
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Sakamoto M, Sakurai N, Tanno H, Iino T, Ohkuma M, Endo A. Faecalibacterium hominis Liu et al. 2023 is a later heterotypic synonym of Faecalibacterium duncaniae Sakamoto et al. 2022. Int J Syst Evol Microbiol 2023; 73. [PMID: 37566461 DOI: 10.1099/ijsem.0.005995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023] Open
Abstract
A strain of the recently validated species Faecalibacterium hominis shares 99.0 % 16S rRNA gene sequence similarity with the type strain of Faecalibacterium duncaniae. The aim of this study was to evaluate the taxonomic relationship between F. hominis and F. duncaniae. F. duncaniae JCM 31915T showed 73.0 % digital DNA-DNA hybridization (dDDH) value with F. hominis JCM 39347T. The average nucleotide identity (ANI) value between these two strains was 96.7 %. These results indicate that F. duncaniae JCM 31915T and F. hominis JCM 39347T represent members of the same species. Based on these data, we propose Faecalibacterium hominis as a later heterotypic synonym of Faecalibacterium duncaniae. An emended description is provided.
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Affiliation(s)
- Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Naomi Sakurai
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Hiroki Tanno
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido 099-2493, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Akihito Endo
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido 099-2493, Japan
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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Mori H, Kato T, Ozawa H, Sakamoto M, Murakami T, Taylor TD, Toyoda A, Ohkuma M, Kurokawa K, Ohno H. Assessment of metagenomic workflows using a newly constructed human gut microbiome mock community. DNA Res 2023; 30:7179629. [PMID: 37253538 DOI: 10.1093/dnares/dsad010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 04/20/2023] [Accepted: 05/18/2023] [Indexed: 06/01/2023] Open
Abstract
To quantify the biases introduced during human gut microbiome studies, analyzing an artificial mock community as the reference microbiome is indispensable. However, there are still limited resources for a mock community which well represents the human gut microbiome. Here, we constructed a novel mock community comprising the type strains of 18 major bacterial species in the human gut and assessed the influence of experimental and bioinformatics procedures on the 16S rRNA gene and shotgun metagenomic sequencing. We found that DNA extraction methods greatly affected the DNA yields and taxonomic composition of sequenced reads, and that some of the commonly used primers for 16S rRNA genes were prone to underestimate the abundance of some gut commensal taxa such as Erysipelotrichia, Verrucomicrobiota and Methanobacteriota. Binning of the assembled contigs of shotgun metagenomic sequences by MetaBAT2 produced phylogenetically consistent, less-contaminated bins with varied completeness. The ensemble approach of multiple binning tools by MetaWRAP can improve completeness but sometimes increases the contamination rate. Our benchmark study provides an important foundation for the interpretation of human gut microbiome data by providing means for standardization among gut microbiome data obtained with different methodologies and will facilitate further development of analytical methods.
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Affiliation(s)
- Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Department of Informatics, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Tamotsu Kato
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
- Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Hiroaki Ozawa
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
- Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Mitsuo Sakamoto
- Microbe Division / Japan Collection of Microorganisms, RIKEN BioResource Research Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Department of Informatics, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Todd D Taylor
- Laboratory for Microbiome Sciences, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Department of Genomics and Evolutionary Biology, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Moriya Ohkuma
- Microbe Division / Japan Collection of Microorganisms, RIKEN BioResource Research Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
| | - Ken Kurokawa
- Advanced Genomics Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Department of Informatics, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Hiroshi Ohno
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
- Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
- Laboratory for Microbiome Sciences, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
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7
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Hisatomi A, Ohkuma M, Sakamoto M. Sellimonas catena sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2023; 73. [PMID: 37185104 DOI: 10.1099/ijsem.0.005853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
Obligately anaerobic, Gram-stain-positive, small-chain coccobacilli, strains 12EGH17T and 18CBH55, were isolated from faecal samples of healthy Japanese humans. Strain 12EGH17T showed the highest 16S rRNA gene sequence similarity to Sellimonas intestinalis BR72T (95.5 %), Coprococcus comes ATCC 27758T (94.4 %) and Clostridium nexile DSM 1787T (93.7 %). The percentage of conserved proteins values between the genome of strain 12EGH17T and that of the members of the genus Sellimonas were >54 %, suggesting that strain 12EGH17T belongs to the genus Sellimonas. The digital DNA-DNA hybridization (dDDH) and average nucleotide identity (ANI) values between strains 12EGH17T and 18CBH55 were higher than the cut-off values of species demarcation (90 % dDDH and 99 % ANI), indicating these two strains are the same species. However, the dDDH and ANI values of these strains were lower than the cut-off values of species demarcation against other strains (<30 % dDDH and <79 % ANI). These results indicate that the isolates should be considered to represent a new species of the genus Sellimonas. The isolates were differentiated from the type species, S. intestinalis, by the ability of aesculin hydrolysis. Based on the collected data, strains 12EGH17T and 18CBH55 represent a novel species in the genus Sellimonas, for which the name Sellimonas catena sp. nov. is proposed. The type strain of S. catena is 12EGH17T (=JCM 35622T=DSM 114916T).
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Affiliation(s)
- Atsushi Hisatomi
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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Tazawa J, Kobayashi H, Tanizawa Y, Uchino A, Tanaka F, Urashima Y, Miura S, Sakamoto M, Ohkuma M, Tohno M. Clostridium folliculivorans sp. nov., isolated from soil samples of an organic paddy in Japan. Int J Syst Evol Microbiol 2023; 73. [PMID: 37103467 DOI: 10.1099/ijsem.0.005876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023] Open
Abstract
Two Gram-stain-negative, terminal endospore-forming, rod-shaped and aerotolerant bacterial strains designated D1-1T and B3 were isolated from soil samples of an organic paddy in Japan. Strain D1-1T grew at 15-37 °C, pH 5.0-7.3, and with up to 0.5 % (w/v) NaCl. Phylogenetic analysis of the 16S rRNA gene revealed that strain D1-1T belonged to the genus Clostridium and was closely related to Clostridium zeae CSC2T (99.7 % sequence similarity), Clostridium fungisolvens TW1T (99.7 %) and Clostridium manihotivorum CT4T (99.3 %). Strains D1-1T and B3 were whole-genome sequenced and indistinguishable, with an average nucleotide identity value of 99.7 %. The average nucleotide identity (below 91.1 %) and digital DNA-DNA hybridization (below 43.6 %) values between the two novel isolates and their corresponding relatives showed that strains D1-1T and B3 could be readily distinguished from their closely related species. A novel Clostridium species, Clostridium folliculivorans sp. nov., with type strain D1-1T (=MAFF 212477T=DSM 113523T), is proposed based on genotypic and phenotypic data.
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Affiliation(s)
- Junko Tazawa
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8666, Japan
| | - Hisami Kobayashi
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Akira Uchino
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8666, Japan
| | - Fukuyo Tanaka
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8604, Japan
| | - Yasufumi Urashima
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8666, Japan
| | - Shigenori Miura
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8666, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masanori Tohno
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
- Research Center of Genetic Resources, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8602, Japan
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9
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Tanno H, Chatel JM, Martin R, Mariat D, Sakamoto M, Yamazaki M, Salminen S, Gueimonde M, Endo A. New gene markers for classification and quantification of faecalibacterium spp. in the human gut. FEMS Microbiol Ecol 2023; 99:7093396. [PMID: 36990641 PMCID: PMC10093996 DOI: 10.1093/femsec/fiad035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 03/14/2023] [Accepted: 03/28/2023] [Indexed: 03/31/2023] Open
Abstract
Faecalibacterium prausnitzii is a promising biomarker of a healthy human microbiota. However, previous studies reported the heterogeneity of this species and found the presence of several distinct groups at the species level among F. prausnitzii strains. Our recent study revealed that methods previously developed for quantification of F. prausnitzii were not specific to the species level because of the heterogeneity within the F. prausnitzii species and the application of 16S rRNA gene which is an invalid genetic marker for the species. Therefore, previously available data failed to provide information on different groups, which limits our understanding of the importance of this organism for host health. Here, we propose an alternative gene marker for quantification of F. prausnitzii-related taxa. Nine group-specific primer pairs were designed by targeting rpoA gene sequences. The newly developed rpoA-based qPCR successfully quantified targeted groups. Application of the developed qPCR assay in six healthy adults revealed marked differences in abundance and prevalence among the different targeted-groups in stool samples. The developed assay will facilitate detailed understanding of the impact of Faecalibacterium populations at the group level on human health and to understand the links between depletion of specific groups in Faecalibacterium and different human disorders.
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Affiliation(s)
- Hiroki Tanno
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, 099-2493 Hokkaido, Japan
| | - Jean-Marc Chatel
- Université Paris-Saclay, Institut National de la Recherche Agronomique et Environnementale, AgroParisTech, MICALIS UMR1319, Commensals and Probiotics-Host Interactions Laboratory, Jouy-en-Josas, France
| | - Rebeca Martin
- Université Paris-Saclay, Institut National de la Recherche Agronomique et Environnementale, AgroParisTech, MICALIS UMR1319, Commensals and Probiotics-Host Interactions Laboratory, Jouy-en-Josas, France
| | - Denis Mariat
- Université Paris-Saclay, Institut National de la Recherche Agronomique et Environnementale, AgroParisTech, MICALIS UMR1319, Commensals and Probiotics-Host Interactions Laboratory, Jouy-en-Josas, France
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba 305-0074 Ibaraki, Japan
| | - Masao Yamazaki
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, 099-2493 Hokkaido, Japan
| | - Seppo Salminen
- Functional Food Forum, University of Turku, 20014 Turku, Finland
| | - Miguel Gueimonde
- Department of Microbiology and Biochemistry of Dairy Products, IPLA-CSIC, 33300 Villaviciosa, Spain
| | - Akihito Endo
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, 099-2493 Hokkaido, Japan
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, 156-8502 Tokyo, Japan
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10
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Sakamoto M, Suzuki KI. In memoriam - Kazuo Komagata (1928 - 2022). Int J Syst Evol Microbiol 2023; 73. [PMID: 36753314 DOI: 10.1099/ijsem.0.005791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Affiliation(s)
- Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Ken-Ichiro Suzuki
- Tokyo University of Agriculture (Visiting Professor), Setagaya-ku, Tokyo 156-8502, Japan
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11
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Siqueira JF, Sakamoto M, Rosado AS. Microbial Community Profiling Using Terminal Restriction Fragment Length Polymorphism (T-RFLP) and Denaturing Gradient Gel Electrophoresis (DGGE). Methods Mol Biol 2023; 2588:91-104. [PMID: 36418684 DOI: 10.1007/978-1-0716-2780-8_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In their natural environments, microorganisms usually live in organized communities. Profiling analysis of microbial communities has recently assumed special relevance as it allows a thorough understanding of the diversity of the microbiota, its behavior over time, and the establishment of patterns associated with health and disease. The application of molecular biology approaches holds the advantage of including culture-difficult and as-yet-uncultivated phylotypes in the profiles, providing a more comprehensive picture of the microbial community. This chapter focuses on two particular techniques, namely terminal restriction fragment length polymorphism (T-RFLP) and denaturing gradient gel electrophoresis (DGGE), both of which have been widely used in environmental studies and have been recently successfully used by the authors in the study of the oral microbial communities associated with conditions of health and disease.
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Affiliation(s)
- José F Siqueira
- Department of Endodontics and Molecular Microbiology Laboratory, Iguaçu University, Rio de Janeiro, Brazil.
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama, Japan
| | - Alexandre S Rosado
- Institute of Microbiology Prof. Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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12
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Abe K, Kitago M, Matsuda S, Shinoda M, Yagi H, Abe Y, Oshima G, Hori S, Endo Y, Yokose T, Miura E, Kubota N, Ueno A, Masugi Y, Ojima H, Sakamoto M, Kitagawa Y. Epstein-Barr virus-associated inflammatory pseudotumor variant of follicular dendritic cell sarcoma of the liver: a case report and review of the literature. Surg Case Rep 2022; 8:220. [PMID: 36484868 PMCID: PMC9733763 DOI: 10.1186/s40792-022-01572-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Follicular dendritic cell sarcoma is a rare stromal tumor with no standard treatment. However, some reports have revealed that follicular dendritic cell sarcoma has an inflammatory pseudotumor variant associated with Epstein-Barr virus infection that has a relatively good prognosis. In this report, we present a case of a resected inflammatory pseudotumor variant of follicular dendritic cell sarcoma of the liver, and have reviewed the literature on the clinicopathological, molecular, and genomic features of this tumor. CASE PRESENTATION The inflammatory pseudotumor variant of follicular dendritic cell sarcoma originates only in the liver or spleen, causes no symptoms, and is more common in middle-aged Asian women. It has no characteristic imaging features, which partially explains why the inflammatory pseudotumor variant of follicular dendritic cell sarcoma is difficult to diagnose. Pathologically, the inflammatory pseudotumor variant of follicular dendritic cell sarcoma has spindle cells mixed with inflammatory cells and is variably positive for follicular dendritic cell markers (CD21, CD23, and CD35) and Epstein-Barr virus-encoded RNA. On genetic analysis, patients with this tumor high levels of latent membrane protein 1 gene expression and extremely low levels of host C-X-C Chemokine Receptor type 7 gene expression, indicating that the inflammatory pseudotumor variant of follicular dendritic cell sarcoma has a latent Epstein-Barr virus type 2 infection. CONCLUSIONS The inflammatory pseudotumor variant of follicular dendritic cell sarcoma is an Epstein-Barr virus-associated tumor and a favorable prognosis by surgical resection, similar to Epstein-Barr virus-associated gastric cancer.
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Affiliation(s)
- K. Abe
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - M. Kitago
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - S. Matsuda
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - M. Shinoda
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - H. Yagi
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Y. Abe
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - G. Oshima
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - S. Hori
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Y. Endo
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - T. Yokose
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - E. Miura
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - N. Kubota
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - A. Ueno
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Y. Masugi
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - H. Ojima
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - M. Sakamoto
- grid.26091.3c0000 0004 1936 9959Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Y. Kitagawa
- grid.26091.3c0000 0004 1936 9959Department of Surgery, Keio University School of Medicine, Shinanomachi 35, Shinjuku-Ku, Tokyo, 160-8582 Japan
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13
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Kohagura J, Tokuzawa T, Yoshikawa M, Shima Y, Nakanishi H, Nakashima Y, Sakamoto M, Katoh H. Ku-band multichannel frequency comb Doppler reflectometer on the GAMMA 10/potential control and divertor simulating experiment (PDX) tandem mirror. Rev Sci Instrum 2022; 93:123507. [PMID: 36586932 DOI: 10.1063/5.0101893] [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: 06/17/2023]
Abstract
A Ku-band (12-18 GHz) multichannel Doppler reflectometer (DR) has been developed in the GAMMA 10/potential control and divertor simulating experiment (PDX) tandem mirror device to improve the applicability of DR measurement for simultaneous monitoring of velocity of electron density turbulence at different locations. Our previous single-channel DR circuit has been replaced by the multichannel microwave system using a nonlinear transmission line based comb generator with heterodyne technique. The multichannel DR system has been installed in the central cell of GAMMA 10/PDX. Initial results of application to GAMMA 10/PDX plasma are presented, showing Doppler frequency shifts during an additional ion cyclotron resonance frequency heating and gas-puffing experiment.
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Affiliation(s)
- J Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T Tokuzawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y Shima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H Nakanishi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M Sakamoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H Katoh
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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14
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Tohno M, Tanizawa Y, Sawada H, Sakamoto M, Ohkuma M, Kobayashi H. A novel species of lactic acid bacteria, Ligilactobacillus pabuli sp. nov., isolated from alfalfa silage. Int J Syst Evol Microbiol 2022; 72. [DOI: 10.1099/ijsem.0.005587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In this study, we isolated a novel strain of lactic acid bacteria, AF129T, from alfalfa silage prepared locally in Morioka, Iwate, Japan. Polyphasic taxonomy was used to characterize the bacterial strain. The bacterium was rod-shaped, Gram-stain-positive, non-spore-forming and catalase-negative. The strain grew at various temperatures (15–40°C) and pH levels (4.0–8.0). The optimum growth conditions were a temperature of 30°C and a pH of 6.0. AF129T exhibited growth at salt (NaCl) concentrations of up to 6.5 % (w/v). The G+C content of the strain’s genomic DNA was 41.5 %. The major fatty acids were C16 : 0, C18 : 1ω9c, C19 : 0cyclo ω8c and summed feature 8. 16S rRNA gene sequencing revealed that AF129T represents a member of the genus
Ligilactobacillus
and it has higher sequence similarities with
Ligilactobacillus pobuzihii
(98.4 %),
Ligilactobacillus acidipiscis
(97.5 %) and
Ligilactobacillus salitolerans
(97.4 %). The digital DNA–DNA hybridization values for AF129T and phylogenetically related species of the genus
Ligilactobacillus
ranged from 19.8% to 24.1%. The average nucleotide identity of the strain with its closely related taxa was lower than the threshold (95 %–96 %) used for species differentiation. In the light of the above-mentioned physiological, genotypic, chemotaxonomic and phylogenetic evidence, we confirm that AF129T represents a member of the genus
Ligilactobacillus
and constitutes a novel species; we propose the name Ligilactobacillus pabuli sp. nov. for this species. The type strain is AF129T =MAFF 518002T =JCM 34518T=BCRC 81335T.
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Affiliation(s)
- Masanori Tohno
- Research Center of Genetic Resources, Core Technology Research Headquarters, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8602, Japan
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Hiroyuki Sawada
- Research Center of Genetic Resources, Core Technology Research Headquarters, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8602, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Hisami Kobayashi
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
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15
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Koyama Y, Sato Y, Sakamoto M. POS0390 GENES OF “DEFENSE RESPONSE TO VIRUS” IN PERIPHERAL BLOOD OF ANTI-MDA5 POSITIVE DERMATOMYOSITIS WERE UPREGULATED AS COMPARE WITH OTHER FORMS OF DERMATOMYOSITIS. ~SUPPRESSING RIG-I LIKE RECEPTOR SIGNALING OR TYPE 1/2 INTERFERON SIGNALING WERE THE KEYS FOR SURVIVAL. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundAnti-melanoma differentiation-associated gene 5–positive dermatomyositis (MDA5 DM) is a rare but distinct subtype of idiopathic inflammatory myopathy (IIM) that is characterized by high mortality due to rapid progressive interstitial lung disease (ILD). MDA5 is a cytosolic protein and a family of retinoic-acid inducible gene-I (RIG-I) like receptor, which functions as a virus RNA sensor and induces the production of type I interferons (IFN-I) and proinflammatory cytokines. This leads to the death of infected cells and the activation of the antigen-specific antiviral immune response. Although the pathogenesis of MDA5 DM is largely unknown, a hypothesis that pathogenic involvement of anti-MDA5 antibodies has been proposed. Recently, similarities have been noted between multifaceted features of COVID-19 and MDA5 DM, which suggests shared underlying autoinflammatory mechanisms.ObjectivesTo detect the critical actors in the pathogenesis of MDA5 DM by gene expression analysis of peripheral blood.MethodsTotal of 31 DM cases were investigated, including anti-aminoacyl-tRNA synthetase positive (ARS) DM (n=12), MDA5 DM (n=7, survivor=3) and others (n=12). Peripheral blood was drawn at baseline and 2 to 3 months after treatments. Total RNAs were then extracted with using PAXgene miRNA kit. After quantifying the expressions of transcripts by multiplex sequencing. And then, hierarchical clustering analysis, enrichment analysis using gene ontology (GO) terms, single sample gene set enrichment analysis (ssGSEA) and weighted gene co-expression network analysis (WGCNA) were performed.ResultsThe hierarchical clustering with expression profiles of peripheral blood at baseline showed major 3 clusters. Interestingly, ARS DM cases were segregated into right side of the 3rd cluster while MDA5 DM cases fell into 1st and 2nd clusters. ARS and MDA5 DM were clearly discriminated if differentially expressed genes (DEGs) between these subtypes of DM were analyzed. By GO enrichment analysis, the terms, such as related to “defense response to virus” including “type1 interferon signaling pathway” were found in the DEGs. In the MDA5 DM cases, ssGSEA revealed that genes of “Fcγ receptor mediated phagocytosis pathway” or “complement and coagulation cascade” were significantly enriched and WGCNA showed that pathways of “T-cell antigen receptor signaling” or “lung fibrosis” were significantly upregulated. Next, we also investigated the DEGs of peripheral blood at 2-3 months after treatment between survival and fatal cases in MDA5 DM. We found that suppressing RIG-I like receptor and type 1 and type 2 interferon (IFN) signaling were the keys for survival.ConclusionMDA5 is a key sensor of several RNA viruses including coronavirus families and then activate antiviral gene transcription such as type 1 IFN genes, leading to establish an antiviral host response. As the pulmonary damage of COVID-19 is known to be difficult to distinguish from the ILD associated with anti-MDA5 DM, the life-threating ILD of MDA5 DM may be caused by the over-activation of RIG-I like receptor signaling via MDA5. The hypothesis is supported by our findings that the defining features of MDA5 DM are activation of “type 1 IFN pathways” and antigen-specific antiviral immune responses including “Fcγ receptor mediated phagocytosis pathway” or “T-cell antigen receptor signaling”. As the levels of anti-MDA5 antibodies reported to be important prognostic parameter, it may be involved in pathogenesis of MDA5 DM. As we found that suppression of type 1 and type 2 IFN signaling were the keys for survival, it seems to be reasonable to use inhibitors of Janus Kinases (JAK) for treatment of MDA5 DM.Disclosure of InterestsYoshinobu Koyama Speakers bureau: Abbvie, Asahikasei, Ayumi, BMS, Eli-Lilly, Mitsubishi Tanabe, Grant/research support from: Abbvie, GSK, Yoshiharu Sato: None declared, Moe Sakamoto: None declared
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16
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Yoshida Y, Fujimura T, Mino T, Sakamoto M. Chiral Binaphthyl‐Based Iodonium Salt (Hypervalent Iodine(III)) as Hydrogen‐ and Halogen‐Bonding Bifunctional Catalyst: Insight into Abnormal Counteranion Effect and Asymmetric Synthesis of
N,S
‐Acetals. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Y. Yoshida
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 11 22100 Como, Italy
| | - T. Fujimura
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 11 22100 Como, Italy
| | - T. Mino
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 11 22100 Como, Italy
| | - M. Sakamoto
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 11 22100 Como, Italy
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17
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Hosoda T, Hamada S, Numata K, Saito Y, Yamazaki S, Minoura A, Sakamoto M, Fujitani S. Intensive care burden of COVID-19 in tertiary care hospitals during the first year of outbreak in Kawasaki City, Japan: A retrospective cohort study. J Infect Chemother 2022; 28:678-683. [PMID: 35177351 PMCID: PMC8825303 DOI: 10.1016/j.jiac.2022.01.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/10/2022] [Accepted: 01/28/2022] [Indexed: 12/15/2022]
Abstract
Introduction This study aimed to describe the changes in the intensive care burden of coronavirus disease 2019 (COVID-19) during the first year of outbreak in Japan. Methods This retrospective cohort study included COVID-19 patients who received mechanical ventilation (MV) support in two designated hospitals for critical patients in Kawasaki City. We compared the lengths of MV and stay in the intensive care unit (ICU) or high care unit (HCU) according to the three epidemic waves. We calculated in-hospital mortality rates in patients with or without MV. Results The median age of the sample was 65.0 years, and 22.7% were women. There were 37, 29, and 62 patients in the first (W1), second (W2), and third waves (W3), respectively. Systemic steroids, remdesivir, and prone positioning were more frequent in W2 and W3. The median length of MV decreased from 18.0 days in W1 to 13.0 days in W3 (P = 0.019), and that of ICU/HCU stay decreased from 22.0 days in W1 to 15.5 days in W3 (P = 0.027). The peak daily number of patients receiving MV support was higher at 18 patients in W1, compared to 8 and 15 patients in W2 and W3, respectively. The mortality rate was 23.4%, which did not significantly change (P = 0.467). Conclusions The lengths of MV and ICU/HCU stay per patient decreased over time. Despite an increase in the number of COVID-19 patients who received MV in W3, this study may indicate that the intensive care burden during the study period did not substantially increase.
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18
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Tanno H, Fujii T, Hirano K, Maeno S, Tonozuka T, Sakamoto M, Ohkuma M, Tochio T, Endo A. Characterization of fructooligosaccharide metabolism and fructooligosaccharide-degrading enzymes in human commensal butyrate producers. Gut Microbes 2022; 13:1-20. [PMID: 33439065 PMCID: PMC7833758 DOI: 10.1080/19490976.2020.1869503] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Butyrate produced by gut microbiota has multiple beneficial effects on host health, and oligosaccharides derived from host diets and glycans originating from host mucus are major sources of its production. A significant reduction of butyrate-producing bacteria has been reported in patients with inflammatory bowel diseases and colorectal cancers. Although gut butyrate levels are important for host health, oligosaccharide metabolic properties in butyrate producers are poorly characterized. We studied the metabolic properties of fructooligosaccharides (FOSs) and other prebiotic oligosaccharides (i.e. raffinose and xylooligosaccharides; XOSs) in gut butyrate producers. 1-Kestose (kestose) and nystose, FOSs with degrees of polymerization of 3 and 4, respectively, were also included. Fourteen species of butyrate producers were divided into four groups based on their oligosaccharide metabolic properties, which are group A (two species) metabolizing all oligosaccharides tested, group F (four species) metabolizing FOSs but not raffinose and XOSs, group XR (four species) metabolizing XOSs and/or raffinose but not FOSs, and group N (four species) metabolizing none of the oligosaccharides tested. Species assigned to groups A and XR are rich glycoside hydrolase (GH) holders, whereas those in groups F and N are the opposite. In total, 17 enzymes assigned to GH32 were observed in nine of the 14 butyrate producers tested, and species that metabolized FOSs had at least one active GH32 enzyme. The GH32 enzymes were divided into four clusters by phylogenetic analysis. Heterologous gene expression analysis revealed that the GH32 enzymes in each cluster had similar FOS degradation properties within clusters, which may be linked to the conservation/substitution of amino acids to bind with substrates in GH32 enzymes. This study provides important knowledge to understand the impact of FOS supplementation on the activation of gut butyrate producers. Abbreviations: SCFA, short chain fatty acid; FOS, fructooligosaccharide; XOS, xylooligosaccharide; CAZy, Carbohydrate Active Enzymes; CBM, carbohydrate-binding module; PUL, polysaccharide utilization locus; S6PH sucrose-6-phosphate hydrolase.
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Affiliation(s)
- Hiroki Tanno
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido, Japan
| | | | | | - Shintaro Maeno
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido, Japan
| | - Takashi Tonozuka
- Department of Applied Biological Science, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Ibaraki, Japan,Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Ibaraki, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Ibaraki, Japan
| | | | - Akihito Endo
- Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido, Japan,CONTACT Akihito Endo Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido099-2493, Japan
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19
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Chida S, Sakamoto M, Takino T, Kawamoto S, Hagiwara K. Changes in immune system and intestinal bacteria of cows during the transition period. Vet Anim Sci 2021; 14:100222. [PMID: 34917853 PMCID: PMC8666551 DOI: 10.1016/j.vas.2021.100222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 11/10/2022] Open
Abstract
Transitional high-energy diets reduce peripheral blood lymphocytes in dairy cows. High-energy diets upregulate IL-1β and IL-2 and downregulate IL-10 expression. Functional lactobacillus plantarum LP1 restores normal levels of lymphocytes subset. Lactobacillus plantarum LP1-added diets reduce inflammatory cytokine expression. LP1 mitigates immune response imbalances caused by transitional high energy diets.
High-yield dairy cows need high energy feed during periods of increased milk production. The transitional feeding to high energy feed increases the risk of developing a variety of metabolic disorders. Here, five Holstein cows were fed a four-stage feeding protocol (3 weeks for each stage) ranging from 54.9 to 73.7% total digestive nutrients (TDN). The purpose of the study was to investigate the effect of lactic acid bacteria on high-energy-fed cows associated with transitional feeding, and to evaluate the effects of probiotics on intestinal bacterial changes and inflammatory responses. Three feed transition periods were established for five cows, and Lactobacillus plantarum RGU-LP1 (LP1) was fed as a probiotic during the high-energy feeding period. The number of lymphocyte subsets such as CD3-, CD4-, and CD8 positive cells decreased in response to the high energy feed. Lipopolysaccharide (LPS)-induced cytokine (IL-1β and IL-2) gene expression in peripheral blood mononuclear cells (PBMCs) was shown to increase in those animals receiving the high energy feed. However, supplementation with LP1 resulted in an increase in the number of lymphocyte subsets and the expression of IL-1β and IL-2 were returned to the level at low energy diet. These results suggest that high energy diets induce inflammatory cytokine responses following LPS stimulation, and that the addition of LP1 mitigates these results by regulating the LPS-induced inflammatory reaction. Therefore, the functional lactic acid bacteria LP1 is expected to regulate inflammation resulting from high energy feeding, and this probiotic could be applied to support inflammatory regulation in high-yield dairy cows.
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Key Words
- Anti-inflammatories
- CD, cluster of differentiation
- Dairy cows
- EDTA, ethylenediaminetetraacetic acid
- GAPDH, Glyceraldehyde 3-phosphate dehydrogenase
- High-energy feed
- IL, Interleukin
- LPS, Lipopolysaccharide
- Lactobacillus plantarum
- PBMC, peripheral blood mononuclear cell
- Probiotics
- TDN, Total-Digestible-Nutrients
- TGF, Transforming Growth Factor
- TMR, Total-Mixed-Ration
- TNF, Tumor Necrosis Factor
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Affiliation(s)
- S Chida
- School of veterinary Medicene, Rakuno Gakuen University, 582 Bunkyodai Ebetsu, Hokkaido, 069-8501 Japan
| | - M Sakamoto
- School of veterinary Medicene, Rakuno Gakuen University, 582 Bunkyodai Ebetsu, Hokkaido, 069-8501 Japan
| | - T Takino
- School of veterinary Medicene, Rakuno Gakuen University, 582 Bunkyodai Ebetsu, Hokkaido, 069-8501 Japan.,Scientific Feed Laboratory co., ltd., R & D center, Sakura city, Chiba, 285-0043 Japan
| | - S Kawamoto
- School of veterinary Medicene, Rakuno Gakuen University, 582 Bunkyodai Ebetsu, Hokkaido, 069-8501 Japan
| | - K Hagiwara
- School of veterinary Medicene, Rakuno Gakuen University, 582 Bunkyodai Ebetsu, Hokkaido, 069-8501 Japan
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Tohno M, Tanizawa Y, Kojima Y, Sakamoto M, Ohkuma M, Kobayashi H. Lentilactobacillus fungorum sp. nov., isolated from spent mushroom substrates. Int J Syst Evol Microbiol 2021; 71. [PMID: 34913426 DOI: 10.1099/ijsem.0.005184] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In Japan, during a screening of lactic acid bacteria in spent mushroom substrates, an unknown bacterium was isolated and could not be assigned to any known species. Strain YK48GT is Gram-stain-positive, rod-shaped, non-motile, non-spore-forming and catalase-negative. The isolate grew in 0-4 % (w/v) NaCl, at 15-37 °C (optimum, 30 °C) and at pH 4.0-8.0 (optimum, pH 6.0). The genomic DNA G+C content of strain YK48GT was 42.5 mol%. Based on its 16S rRNA gene sequence, strain YK48GT represented a member of the genus Lentilactobacillus and showed the highest pairwise similarity to Lentilactobacillus rapi DSM 19907T (97.86 %). Phylogenetic analyses based on amino acid sequences of 466 shared protein-encoding genes also revealed that the strain was phylogenetically positioned in the genus Lentilactobacillus but did not suggest an affiliation with previously described species. The average nucleotide identity and digital DNA-DNA hybridization values between strain YK48GT and the type strains of phylogenetically related species were 72.2-76.6% and 19.0-21.2 %, respectively, indicating that strain YK48GT represents a novel species within the genus Lentilactobacillus. Phenotypic data further confirmed the differentiation of strain YK48GT from other members of the genus Lentilactobacillus. According to the results of the polyphasic characterization presented in this study, strain YK48GT represents a novel species of the genus Lentilactobacillus, for which the name Lentilactobacillus fungorum sp. nov. is proposed. The type strain is YK48GT (=JCM 32598T=DSM 107968T).
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Affiliation(s)
- Masanori Tohno
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi 329-2793, Japan.,Research Center of Genetic Resources, Core Technology Research Headquarters, NARO, Tsukuba, Ibaraki, 305-8632, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Yoichiro Kojima
- Central Region Agricultural Research Center, NARO, Nasushiobara, Tochigi 329-2793, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Hisami Kobayashi
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi 329-2793, Japan
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Sakamoto M, Ikeyama N, Yuki M, Murakami T, Mori H, Iino T, Ohkuma M. Adlercreutzia hattorii sp. nov., an equol non-producing bacterium isolated from human faeces. Int J Syst Evol Microbiol 2021; 71. [PMID: 34870581 DOI: 10.1099/ijsem.0.005121] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two obligately anaerobic, Gram-stain-positive, rod-shaped bacteria were isolated from faecal samples of healthy humans in Japan. 16S rRNA gene sequence analysis indicated that these two strains (8CFCBH1T and 9CBH6) belonged to the genus Adlercreutzia, which is known as an equol-producing bacterium. The closest neighbours of strain 8CFCBH1T were Adlercreutzia equolifaciens subsp. equolifaciens DSM 19450T (98.6%), Adlercreutzia equolifaciens subsp. celatus do03T (98.4%), Adlercreutzia muris WCA-131-CoC-2T (96.6%), Parvibacter caecicola NR06T (96.4%), Adlercreutzia caecimuris B7T (95.3%) and Adlercreutzia mucosicola Mt1B8T (95.3%). The closest relatives to strain 9CBH6 were A. equolifaciens subsp. equolifaciens DSM 19450T (99.8%), A. equolifaciens subsp. celatus do03T (99.6%) and A. muris WCA-131-CoC-2T (96.8%). Strain 8CFCBH1T showed 22.3-53.5% digital DNA-DNA hybridization (dDDH) values with its related species. In addition, the average nucleotide identity (ANI) values between strain 8CFCBH1T and its related species ranged from 75.4 to 93.3%. On the other hand, strain 9CBH6 was considered as A. equolifaciens based on the dDDH and ANI values (>70% dDDH and >95-96% ANI). Strain 9CBH6 showed daidzein-converting activity, as expected from the result of genome analysis. The genome of strain 8CFCBH1T lacked four genes involved in equol production. Growing cells of strain 8CFCBH1T were not capable of converting daidzein. Based on the collected data, strain 8CFCBH1T represents a novel species in the genus Adlercreutzia, for which the name Adlercreutzia hattorii sp. nov. is proposed. The type strain of A. hattorii is 8CFCBH1T (=JCM 34083T=DSM 112284T).
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Affiliation(s)
- Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masahiro Yuki
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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Abstract
A rod-shaped, Gram-stain-negative, strictly anaerobic, catalase-negative and endospore-forming bacterial strain CSC2T was isolated from corn silage preserved in Tochigi, Japan. The strain CSC2T grew at 15-40 °C, at pH 5.0-7.7 and with up to 0.5 % (w/v) NaCl. The main cellular fatty acids were C14 : 0, C16 : 0 and C16 : 0 dimethyl acetal. The cellular polar lipids detected were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidic acid, lysophosphatidylethanolamine, phosphatidylserine, lysophosphatidylcholine and two unidentified polar lipids. Phylogenetic analysis of the 16S rRNA gene showed that strain CSC2T was a member of the genus Clostridium and closely related to Clostridium polyendosporum DSM 57272T (95.6 % gene sequence similarity) and Clostridium fallax ATCC 19400T (95.3 %). The genomic DNA G+C content of strain CSC2T was 31.1 mol% (whole genome analysis). The average nucleotide identity based on blast and digital DNA-DNA hybridization values between strain CSC2T and the type strains of phylogenetically related species were below 71 and 24 %, respectively. On the basis of the genotypic, phenotypic and chemotaxonomic characteristics, it is proposed to designate strain CSC2T as representing Clostridium zeae sp. nov. The type strain is CSC2T (=MAFF212476T=JCM 33766T=DSM 111242T).
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Affiliation(s)
- Hisami Kobayashi
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi 329-2793, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Masaru Yagura
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masanori Tohno
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi 329-2793, Japan
- Research Center of Genetic Resources, Core Technology Research Headquarters, NARO, Tsukuba, Ibaraki, 305-8632, Japan
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Kobayashi H, Tanizawa Y, Sakamoto M, Ohkuma M, Tohno M. Taxonomic status of the species Clostridium methoxybenzovorans Mechichi et al. 1999. Int J Syst Evol Microbiol 2021; 71. [PMID: 34379581 DOI: 10.1099/ijsem.0.004951] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The taxonomic status of the species Clostridium methoxybenzovorans was assessed. The 16S rRNA gene sequence, whole-genome sequence and phenotypic characterizations suggested that the type strain deposited in the American Type Culture Collection (C. methoxybenzovorans ATCC 700855T) is a member of the species Eubacterium callanderi. Hence, C. methoxybenzovorans ATCC 700855T cannot be used as a reference for taxonomic study. The type strain deposited in the German Collection of Microorganism and Cell Cultures GmbH (DSM 12182T) is no longer listed in its online catalogue. Also, both the 16S rRNA gene and the whole-genome sequences of the original strain SR3T showed high sequence identity with those of Lacrimispora indolis (recently reclassified from Clostridium indolis) as the most closely related species. Analysis of the two genomes showed average nucleotide identity based on blast and digital DNA-DNA hybridization values of 98.3 and 87.9 %, respectively. Based on these results, C. methoxybenzovorans SR3T was considered to be a member of L. indolis.
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Affiliation(s)
- Hisami Kobayashi
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masanori Tohno
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan.,Research Center of Genetic Resources, Core Technology Research Headquarters, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8632, Japan
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Takayama T, Yamazaki S, Matsuyama Y, Midorikawa Y, Shiina S, Izumi N, Hasegawa K, Kokudo N, Sakamoto M, Kubo S, Kudo M, Murakami T, Nakashima O. Prognostic grade for resecting hepatocellular carcinoma: multicentre retrospective study. Br J Surg 2021; 108:412-418. [PMID: 33793713 DOI: 10.1093/bjs/znaa109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/31/2020] [Accepted: 11/03/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Surgical treatment for hepatocellular carcinoma (HCC) is advancing, but a robust prediction model for survival after resection is not available. The aim of this study was to propose a prognostic grading system for resection of HCC. METHODS This was a retrospective, multicentre study of patients who underwent first resection of HCC with curative intent between 2000 and 2007. Patients were divided randomly by a cross-validation method into training and validation sets. Prognostic factors were identified using a Cox proportional hazards model. The predictive model was built by decision-tree analysis to define the resection grades, and subsequently validated. RESULTS A total of 16 931 patients from 795 hospitals were included. In the training set (8465 patients), four surgical grades were classified based on prognosis: grade A1 (1236 patients, 14.6 per cent; single tumour 3 cm or smaller and anatomical R0 resection); grade A2 (3614, 42.7 per cent; single tumour larger than 3 cm, or non-anatomical R0 resection); grade B (2277, 26.9 per cent; multiple tumours, or vascular invasion, and R0 resection); and grade C (1338, 15.8 per cent; multiple tumours with vascular invasion and R0 resection, or R1 resection). Five-year survival rates were 73.9 per cent (hazard ratio (HR) 1.00), 64.7 per cent (HR 1.51, 95 per cent c.i. 1.29 to 1.78), 50.6 per cent (HR 2.53, 2.15 to 2.98), and 34.8 per cent (HR 4.60, 3.90 to 5.42) for grades A1, A2, B, and C respectively. In the validation set (8466 patients), the grades had equivalent reproducibility for both overall and recurrence-free survival (all P < 0.001). CONCLUSION This grade is used to predict prognosis of patients undergoing resection of HCC.
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Affiliation(s)
- T Takayama
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - S Yamazaki
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Y Matsuyama
- Department of Biostatistics, School of Public Health, University of Tokyo, Tokyo, Japan
| | - Y Midorikawa
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - S Shiina
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - N Izumi
- Department of Gastroenterology, Musashino Red Cross Hospital, Tokyo, Japan
| | - K Hasegawa
- Department of Hepato-biliary-pancreatic Surgery, School of Medicine, University of Tokyo, Tokyo, Japan
| | - N Kokudo
- Department of Hepato-biliary-pancreatic Surgery, National Center for Global Health and Medicine, Tokyo, Japan
| | - M Sakamoto
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - S Kubo
- Department of Hepato-biliary-pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - M Kudo
- Department of Gastroenterology and Hepatology, Kinki University School of Medicine, Osaka-Sayama, Japan
| | - T Murakami
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - O Nakashima
- Department of Clinical Laboratory Medicine, Kurume University Hospital, Kurume, Japan
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Abstract
During a study on the biodiversity of bacteria that inhabit woody biomass, we isolated a strain coded B40T from hardwood bark used as a compost ingredient in Japan. The strain, characterized as B40T, is a Gram-stain-positive, rod-shaped, non-motile, non-spore-forming and catalase-negative bacterium. This novel isolate showed growth at 30-50 °C, at pH 3.5-7.5 and in the presence of up to 4 % (w/v) NaCl. Its major fatty acids include C16:0, C18:1 ω9c and summed feature 8. The genomic DNA G+C content of strain B40T is 42.2 mol%. Results of 16S rRNA gene sequence-based phylogenetic analysis indicated that strain B40T belongs to the genus Lactobacillus and the closest neighbours of strain B40T are Lactobacillus gigeriorum 202T (95.7 %), Lactobacillus pasteurii CRBIP 24.76T (95.6 %), Lactobacillus psittaci DSM 15354T (95.4 %), Lactobacillus fornicalis TV1018T (95.4 %) and Lactobacillus jensenii ATCC 25258T (95.2 %). The amino acid sequence-based phylogenetic analyses of 489 shared protein-encoding genes showed that the strain forms a phylogenetically independent lineage in the genus Lactobacillus but could not be assigned to any known species. Strain B40T has an average nucleotide identify of <70.2 % and a digital DNA-DNA hybridization value of 19.2 % compared with the strains of other closely related Lactobacillus species. Differential genomic, phenotypic and chemotaxonomic properties, in addition to phylogenetic analyses, indicated that strain B40T represents a novel species of the genus Lactobacillus, for which the name Lactobacillus corticis sp. nov. is proposed. The strain type is B40T (=JCM 32597T=DSM 107967T).
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Affiliation(s)
- Masanori Tohno
- Research Center of Genetic Resources, Core Technology Research Headquarters, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan.,Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization Nasushiobara, Tochigi, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Yoichiro Kojima
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Nasushiobara, Tochigi, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Hisami Kobayashi
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization Nasushiobara, Tochigi, Japan
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Sakamoto M, Ikeyama N, Toyoda A, Murakami T, Mori H, Morohoshi S, Kunihiro T, Iino T, Ohkuma M. Coprobacter secundus subsp. similis subsp. nov. and Solibaculum mannosilyticum gen. nov., sp. nov., isolated from human feces. Microbiol Immunol 2021; 65:245-256. [PMID: 33913539 DOI: 10.1111/1348-0421.12886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/08/2021] [Accepted: 04/19/2021] [Indexed: 01/15/2023]
Abstract
An obligately anaerobic, Gram-stain-negative, rod-shaped bacterium, designated strain 2CBH44T , was isolated from the fecal sample of a healthy Japanese man. This strain was initially assigned as a novel species of the genus Coprobacter based on the 16S rRNA gene sequence similarities compared with other Coprobacter species. The 16S rRNA gene sequence analysis revealed strain 2CBH44T had relatively low 16S rRNA gene sequence similarity (97.5%) to Coprobacter secundus 177T . However, strain 2CBH44T showed 96.9% average nucleotide identity value with C. secundus 177T , indicating that strain 2CBH44T and C. secundus 177T belong to the same species. On the other hand, the digital DNA-DNA hybridization value between strain 2CBH44T and C. secundus 177T was 73.5%, indicating that strain 2CBH44T is a subspecies of C. secundus. Another anaerobic, Gram-stain-variable, rod-shaped bacterium, designated strain 12CBH8T , was also isolated from human feces. Strain 12CBH8T had significantly low 16S rRNA gene sequence similarities (<92.0%) to the validated bacterial species within the family Oscillospiraceae. The percentage of conserved protein values between the genome of strain 12CBH8T and that of the validated related taxa were <50%, suggesting that strain 12CBH8T belongs to a novel genus. On the basis of the collected data, strain 2CBH44T represents a novel subspecies of C. secundus, for which the name Coprobacter secundus subsp. similis subsp. nov. (type strain 2CBH44T = JCM 34079T = DSM 111570T ) is proposed. Strain 12CBH8T represents a novel species of a novel genus, for which the name Solibaculum mannosilyticum gen. nov., sp. nov. (type strain 12CBH8T = JCM 34081T = DSM 111571T ) is proposed.
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Affiliation(s)
- Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki, Japan
| | - Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Sho Morohoshi
- TechnoSuruga Laboratory Co. Ltd, Shizuoka-shi, Shizuoka, Japan
| | - Tadao Kunihiro
- TechnoSuruga Laboratory Co. Ltd, Shizuoka-shi, Shizuoka, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
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Koyama Y, Sato Y, Shoji T, Fuke S, Umayahara T, Sakamoto M. POS0881 DETECTION OF THE GENE EXPRESSIONS IN PERIPHERAL BLOOD INVOLVED IN THE PROGRESSION OF PULMONARY VESSEL DISEASE AT THE SUBCLINICAL STAGE OF PULMONARY HYPERTENSION ASSOCIATED WITH SYSTEMIC SCLEROSIS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.3609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Pulmonary hypertension (PH) is prominent as a vascular involvement of systemic sclerosis (SSc), which remains a leading cause of death in spite of current best treatments. Recently, hemodynamic definition of PH was updated from mPAP≥25mmHg to mPAP>20mmHg and PVR≥3WU. Although new definition may improve the prognosis of PH associated with SSc by giving a chance to start management early, it may be insufficient as more than 2/3 of the pulmonary circulation is already impaired by the time of meeting the definition. Therefore, the ideal therapeutic intervention should be started at the subclinical stage of PH in SSc patients, but little is known about underlying pathological mechanisms at the stage. In this study, we investigate progression to exercise-induced PH (exPH)1), which is considered subclinical PH, in the prospective registry of high-risk population for developing PH associated with SSc.Objectives:To detect the gene expressions in peripheral blood involved in the progression of pulmonary vessel disease (PVD) at the subclinical stage of PH associated with SSc.Methods:Total of 180 patients who had not met PH criteria with Raynaud phenomenon, skin sclerosis or SSc-related autoantibody was registered. To detect the early PVD, exercise Doppler echocardiography (exDE) was carried out every 6 or 12 months for up to 6 years. The definition of exPH was maximum sPAP>40mmHg or increase in sPAP>20mmHg estimated by exDE during exercise. For gene expression analysis, total RNAs from whole peripheral blood cells were extracted by PAXgene system, and then multiplex sequencing was done. To identify candidate genes involved in the progression to exPH, random forest machine learning method was employed. Volcano plots, a scatter plots to visualize fold-changes and p-values of differentially expressed genes (DEGs) between exPH and others (exN), were also used for seeking the important genes for disease progression.Results:At the time of registration, 34.4% of patients met exPH criteria, and 15.6% of patients developed exPH during follow-up period (35.0±18.1 months). Expression of TNF gene was selected as the most useful genes to predict progression to exPH by random forest, and the accuracy of the model was about 87%. Volcano plots indicated that expressions of TMEM176A and TMEM176B were prominent (fold-change >2.4 and -log10 p-value >3.5) in exPH patients. The accuracy was improved to 90% if the expression of TNF and TMEMA/B were used for the prediction of progression to exPH. We found that statistically significant increase in the expression of TNF was eliminated at the time of fulfilling the exPH criteria, while increase in expressions of TMEM A/B were still kept.Conclusion:It was reported that TNFα drives pulmonary arterial hypertension by suppressing the BMP type-II receptor and altering NOTCH signalling2). Our findings suggest that TNFα plays important role only in the period of pre-exPH. On the other hand, increase in expressions of TMEM A/B were observed through the period of pre-exPH to post-exPH. It suggests that there are multiple phases before developing PH associated with SSc. It is very important to understand the phases for the precise treatment to arrest the progression of PVD.References:[1]R. Naeije et al., Am J resp and critical care med 187, 576-583 (2013). 2) LA. Hurst et al., Nat Commun. 13;8:14079 (2017).Disclosure of Interests:Yoshinobu Koyama Speakers bureau: Asahikasei, Ayumi, BMS, Mitsubishi Tanabe, Shin-nihon, Paid instructor for: Asahikasei, Asteras, BMS, Grant/research support from: Eli-Lilly, Yoshiharu Sato: None declared, Tatsuma Shoji: None declared, Soichiro Fuke: None declared, Takatsune Umayahara: None declared, Moe Sakamoto: None declared
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Suzuki-Hashido N, Tsuchida S, Hayakawa T, Sakamoto M, Azumano A, Seino S, Matsuda I, Ohkuma M, Ushida K. Lactobacillus nasalidis sp. nov., isolated from the forestomach of a captive proboscis monkey ( Nasalis larvatus). Int J Syst Evol Microbiol 2021; 71. [PMID: 33906706 DOI: 10.1099/ijsem.0.004787] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 11/18/2022] Open
Abstract
Three strains (YZ01T, YZ02 and YZ03) of Gram-stain-positive, facultatively anaerobic rods were isolated from the forestomach contents collected from a captive male proboscis monkey (Nasalis larvatus) at Yokohama Zoo in Japan. Phylogenetic analysis of the 16S rRNA gene sequences revealed that these strains belonged to the genus Lactobacillus. Based on the sequence similarity of the 16S rRNA gene, Lactobacillus delbrueckii subsp. indicus JCM 15610T was the closest phylogenetic neighbour to YZ01T. Sequence analyses of two partial concatenated housekeeping genes, the RNA polymerase alpha subunit (rpoA) and phenylalanyl-tRNA synthase alpha subunit (pheS) also indicated that the novel strains belonged to the genus Lactobacillus. The average nucleotide identity and digital DNA-DNA hybridization (dDDH) between L. delbrueckii subsp. indicus and YZ01T were 85.9 and 31.4 %, respectively. The phylogenetic tree based on the whole genomic data of strains YZ01T, YZ02 and YZ03 suggested that these three strains formed a single monophyletic cluster in the genus Lactobacillus, indicating that it belonged to a new species. The DNA G+C content of strain YZ01T was 51.6 mol%. The major fatty acids were C16 : 0 and C18 : 1 ω9c. Therefore, based on phylogenetic, phenotypic and physiological evidence, strains YZ01T, YZ02 and YZ03 represent a novel species of the genus Lactobacillus, for which the name Lactobacillus nasalidis sp. nov. is proposed with the type strain YZ01T (=JCM 33769T=DSM 110539T).
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Affiliation(s)
- Nami Suzuki-Hashido
- Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo, 102-0083, Japan.,Chubu University Academy of Emerging Sciences, Kasugai, Aichi, 487-8501, Japan
| | - Sayaka Tsuchida
- Chubu University Academy of Emerging Sciences, Kasugai, Aichi, 487-8501, Japan
| | - Takashi Hayakawa
- Japan Monkey Centre, Inuyama, Aichi, 484-0081, Japan.,Faculty of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810 Hokkaido, Japan
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan.,Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | | | - Satoru Seino
- Present address: Preservation and Research Center, City of Yokohama, Yokohama, Kanagawa, 241-0804, Japan.,Yokohama Zoo Zoorasia, Yokohama, Kanagawa, 241-0001, Japan
| | - Ikki Matsuda
- Wildlife Research Center, Kyoto University, Sakyo-ku, Kyoto, 606-8203, Japan.,Chubu University Academy of Emerging Sciences, Kasugai, Aichi, 487-8501, Japan.,Institute for Tropical Biology and Conservation, University Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia.,Japan Monkey Centre, Inuyama, Aichi, 484-0081, Japan
| | | | - Kazunari Ushida
- College of Bioscience and Biotechnology, Chubu University, Kasugai, Aichi, 487-8501, Japan.,Chubu University Academy of Emerging Sciences, Kasugai, Aichi, 487-8501, Japan
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Sekine R, Hirata M, Ikezoe R, Jang S, Kubota Y, Kayano H, Sugata K, Aizawa T, Noguchi D, Kim D, Sugimoto Y, Matsuura R, Yamazaki H, Ichimura M, Yoshikawa M, Kohagura J, Nakashima Y, Ezumi N, Sakamoto M. Measurement of axial phase difference of density fluctuations owing to spontaneously excited waves by using microwave reflectometer on GAMMA 10/PDX. Rev Sci Instrum 2021; 92:053506. [PMID: 34243319 DOI: 10.1063/5.0043821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/14/2021] [Indexed: 06/13/2023]
Abstract
In the GAMMA 10/PDX tandem mirror, plasma with strong ion-temperature anisotropy is produced by using the ion cyclotron range of frequency waves. This anisotropy of ion temperature causes several Alfvén-Ion-Cyclotron (AIC) waves to spontaneously excite in the frequency range just below the ion cyclotron frequency. In addition, difference-frequency (DF) waves are excited in the radial inner region of the plasma by wave-wave coupling among the AIC waves. The radial density profiles were measured at multi-axial positions using a frequency-modulation reflectometer with an axial array of microwave antennas, and an axial variation of the density was found to be significant. In addition, a relative phase difference of the DF wave between axially separated two points was first obtained by finely choosing the probing frequency of the reflectometers with a maximum coherence used as a measure, indicating that the DF wave is a propagating wave, while the pump AIC waves are standing waves in the axial region of measurement.
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Affiliation(s)
- R Sekine
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M Hirata
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - R Ikezoe
- Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - S Jang
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Y Kubota
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - H Kayano
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - K Sugata
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T Aizawa
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - D Noguchi
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - D Kim
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Y Sugimoto
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - R Matsuura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - H Yamazaki
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - J Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Y Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - N Ezumi
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M Sakamoto
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
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30
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Tourlousse DM, Narita K, Miura T, Sakamoto M, Ohashi A, Shiina K, Matsuda M, Miura D, Shimamura M, Ohyama Y, Yamazoe A, Uchino Y, Kameyama K, Arioka S, Kataoka J, Hisada T, Fujii K, Takahashi S, Kuroiwa M, Rokushima M, Nishiyama M, Tanaka Y, Fuchikami T, Aoki H, Kira S, Koyanagi R, Naito T, Nishiwaki M, Kumagai H, Konda M, Kasahara K, Ohkuma M, Kawasaki H, Sekiguchi Y, Terauchi J. Validation and standardization of DNA extraction and library construction methods for metagenomics-based human fecal microbiome measurements. Microbiome 2021; 9:95. [PMID: 33910647 PMCID: PMC8082873 DOI: 10.1186/s40168-021-01048-3] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/12/2021] [Indexed: 05/27/2023]
Abstract
BACKGROUND Validation and standardization of methodologies for microbial community measurements by high-throughput sequencing are needed to support human microbiome research and its industrialization. This study set out to establish standards-based solutions to improve the accuracy and reproducibility of metagenomics-based microbiome profiling of human fecal samples. RESULTS In the first phase, we performed a head-to-head comparison of a wide range of protocols for DNA extraction and sequencing library construction using defined mock communities, to identify performant protocols and pinpoint sources of inaccuracy in quantification. In the second phase, we validated performant protocols with respect to their variability of measurement results within a single laboratory (that is, intermediate precision) as well as interlaboratory transferability and reproducibility through an industry-based collaborative study. We further ascertained the performance of our recommended protocols in the context of a community-wide interlaboratory study (that is, the MOSAIC Standards Challenge). Finally, we defined performance metrics to provide best practice guidance for improving measurement consistency across methods and laboratories. CONCLUSIONS The validated protocols and methodological guidance for DNA extraction and library construction provided in this study expand current best practices for metagenomic analyses of human fecal microbiota. Uptake of our protocols and guidelines will improve the accuracy and comparability of metagenomics-based studies of the human microbiome, thereby facilitating development and commercialization of human microbiome-based products. Video Abstract.
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Affiliation(s)
- Dieter M Tourlousse
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8566, Japan
| | - Koji Narita
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Chitose Laboratory Corp., Kawasaki, Kanagawa, 216-0041, Japan
| | - Takamasa Miura
- Biological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, 292-0818, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Akiko Ohashi
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8566, Japan
| | - Keita Shiina
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8566, Japan
| | - Masami Matsuda
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8566, Japan
| | - Daisuke Miura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8566, Japan
| | - Mamiko Shimamura
- Biological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, 292-0818, Japan
| | - Yoshifumi Ohyama
- Biological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, 292-0818, Japan
| | - Atsushi Yamazoe
- Biological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, 292-0818, Japan
| | - Yoshihito Uchino
- Biological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, 292-0818, Japan
| | - Keishi Kameyama
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki, Kanagawa, 210-8681, Japan
| | - Shingo Arioka
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Laboratory for Innovative Therapy Research, Shionogi and Co., Ltd., Toyonaka, Osaka, 561-0825, Japan
| | - Jiro Kataoka
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Japan Tobacco Inc., Minato, Tokyo, 105-6927, Japan
| | - Takayoshi Hisada
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- TechnoSuruga Laboratory Co., Ltd., Shizuoka, Shizuoka, 424-0065, Japan
| | - Kazuyuki Fujii
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Infectious Diseases Unit, Department of Medical Innovations, New Drug Research Division, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, 771-0192, Japan
| | - Shunsuke Takahashi
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- TechnoSuruga Laboratory Co., Ltd., Shizuoka, Shizuoka, 424-0065, Japan
| | - Miho Kuroiwa
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Laboratory for Innovative Therapy Research, Shionogi and Co., Ltd., Toyonaka, Osaka, 561-0825, Japan
| | - Masatomo Rokushima
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Laboratory for Innovative Therapy Research, Shionogi and Co., Ltd., Toyonaka, Osaka, 561-0825, Japan
| | - Mitsue Nishiyama
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Tsumura Kampo Research Laboratories, Tsumura & Co., Ami, Ibaraki, 300-1192, Japan
| | - Yoshiki Tanaka
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Biofermin Pharmaceutical Co., Ltd., Kobe, Hyogo, 650-0021, Japan
| | - Takuya Fuchikami
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- CDM Center Division 4, Takara Bio Inc., Kusatsu, Shiga, 525-0058, Japan
| | - Hitomi Aoki
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- CDM Center Division 4, Takara Bio Inc., Kusatsu, Shiga, 525-0058, Japan
| | - Satoshi Kira
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- CDM Center Division 4, Takara Bio Inc., Kusatsu, Shiga, 525-0058, Japan
| | - Ryo Koyanagi
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Molecular Genetic Research Department, Advanced Technology Center, LSI Medience Corporation, Chiyoda, Tokyo, 101-8517, Japan
| | - Takeshi Naito
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- H.U. Group Research Institute G.K., Hachioji, Tokyo, 192-0031, Japan
| | - Morie Nishiwaki
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- H.U. Group Research Institute G.K., Hachioji, Tokyo, 192-0031, Japan
| | - Hirotaka Kumagai
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- JSR-Keio University Medical and Chemical Innovation Center, Shinjuku, Tokyo, 160-8582, Japan
| | - Mikiko Konda
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- JSR-Keio University Medical and Chemical Innovation Center, Shinjuku, Tokyo, 160-8582, Japan
| | - Ken Kasahara
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan
- Chitose Laboratory Corp., Kawasaki, Kanagawa, 216-0041, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Hiroko Kawasaki
- Biological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, 292-0818, Japan
| | - Yuji Sekiguchi
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8566, Japan.
| | - Jun Terauchi
- Japan Microbiome Consortium (JMBC), Osaka, Osaka, 530-0011, Japan.
- Ono Pharmaceutical Co., Ltd., Osaka, Osaka, 541-8564, Japan.
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31
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Ikeyama N, Sakamoto M, Ohkuma M, Hiramoto S, Wang J, Tone S, Shiiba K. Fecal Microbiota Perspective for Evaluation of Prebiotic Potential of Bamboo Hemicellulose Hydrolysate in Mice: A Preliminary Study. Microorganisms 2021; 9:microorganisms9050888. [PMID: 33919296 PMCID: PMC8143322 DOI: 10.3390/microorganisms9050888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 01/02/2023] Open
Abstract
Bamboo hemicellulose hydrolysate (BHH) may possess antihypercholesterolemic activity; however, this activity requires further comprehensive study to assess the prebiotic mechanisms of BHH in vivo. Here, we used high-throughput 16S rRNA gene sequencing to preliminarily investigate the correlations between BHH and the fecal microbiomes of three groups of mice fed either a normal diet, a high-fat diet, or a high-fat diet supplemented with 5% BHH for 5 weeks. Alpha diversity (within community) was nonsignificant for all groups; however, beta diversity analysis among communities showed that 5% BHH suppressed the significant changes induced by the high-fat diet. The Firmicutes/Bacteroidetes ratio, the family S24-7 within the order Bacteroidales, the family Lachnospiraceae and several cellulolytic taxa were slightly ameliorated in the BHH group. These results indicated that BHH supplementation influenced the gut bacterial community and suppressed the high-fat diet-induced alterations. Additionally, BHH significantly lowered the serum cholesterol levels and fecal pH. Improving short-chain fatty acid production for all of the bacterial communities in the mouse guts may induce this effect. Thus, the prebiotic potential of BHH should be evaluated considering the gut microbial communities and their interactions.
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Affiliation(s)
- Nao Ikeyama
- RIKEN BioResource Research Center, Microbe Division/Japan Collection of Microorganisms, Tsukuba, Ibaraki 305-0074, Japan; (N.I.); (M.S.); (M.O.)
| | - Mitsuo Sakamoto
- RIKEN BioResource Research Center, Microbe Division/Japan Collection of Microorganisms, Tsukuba, Ibaraki 305-0074, Japan; (N.I.); (M.S.); (M.O.)
| | - Moriya Ohkuma
- RIKEN BioResource Research Center, Microbe Division/Japan Collection of Microorganisms, Tsukuba, Ibaraki 305-0074, Japan; (N.I.); (M.S.); (M.O.)
| | - Shigeru Hiramoto
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama 350-0394, Japan; (S.H.); (J.W.); (S.T.)
| | - Jianpeng Wang
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama 350-0394, Japan; (S.H.); (J.W.); (S.T.)
| | - Shigenobu Tone
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama 350-0394, Japan; (S.H.); (J.W.); (S.T.)
| | - Kiwamu Shiiba
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama 350-0394, Japan; (S.H.); (J.W.); (S.T.)
- Correspondence: ; Tel.: +81-49-296-5608
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Yoshikawa M, Mouri T, Nakanishi H, Kohagura J, Shima Y, Sakamoto M, Nakashima Y, Ezumi N, Minami R, Yamada I, Yasuhara R, Funaba H, Minami T, Kenmochi N. Improvement in multipass Thomson scattering system comprising laser amplification system developed in GAMMA 10/PDX. Rev Sci Instrum 2021; 92:033515. [PMID: 33820074 DOI: 10.1063/5.0040461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 02/13/2021] [Indexed: 06/12/2023]
Abstract
The multipass Thomson scattering (MPTS) technique is one of the most useful methods for measuring low-electron-density plasmas. The MPTS system increases Thomson scattering (TS) signal intensities by integrating all multipass (MP) signals and improving the TS time resolution by analyzing each pass signal. The fully coaxial MPTS system developed in GAMMA 10/potential-control and diverter-simulator experiments has a polarization-based configuration with image-relaying optics. The MPTS system can enhance Thomson scattered signals for improving the measurement accuracy and megahertz-order time resolution. In this study, we develop a new MPTS system comprising a laser amplification system to obtain continuous MP signals. The laser amplification system can improve degraded laser power and return an amplified laser to the MP system. We obtain continuous MP signals from the laser amplification system by improving the laser beam profile adjuster in gas scattering experiments. Moreover, we demonstrate that more MP signals and stronger amplified MP signals can be achieved via multiple laser injections to the laser amplification system in the developed MP system comprising a laser amplification system.
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Affiliation(s)
- M Yoshikawa
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - T Mouri
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - H Nakanishi
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - J Kohagura
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y Shima
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - M Sakamoto
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y Nakashima
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - N Ezumi
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - R Minami
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - I Yamada
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
| | - R Yasuhara
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
| | - H Funaba
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
| | - T Minami
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - N Kenmochi
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
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Ikeyama N, Ohkuma M, Sakamoto M. Stress Response of Mesosutterella multiformis Mediated by Nitrate Reduction. Microorganisms 2020; 8:microorganisms8122003. [PMID: 33333944 PMCID: PMC7765368 DOI: 10.3390/microorganisms8122003] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/07/2020] [Accepted: 12/14/2020] [Indexed: 11/25/2022] Open
Abstract
Bacterial stress responses are closely associated with the survival and colonization of anaerobes in the human gut. Mesosutterella multiformis JCM 32464T is a novel member of the family Sutterellaceae, an asaccharolytic bacterium. We previously demonstrated energy generation via heme biosynthesis, which is coupled with nitrate reductase. Here, physiological and morphological changes in M. multiformis induced by exposure to nitrate were investigated. The ability of M. multiformis to reduce nitrate was determined using a colorimetric assay. A unique morphology was observed during nitrate reduction under anaerobic conditions. The association between nitrate concentration and cell size or cellular fatty acid composition was evaluated. Nitrate-induced responses of M. multiformis were compared to those of related species. An increase in cellular filamentation and the ratio of saturated: unsaturated fatty acids was mediated specifically by nitrate. This indicates a decrease in cell fluidity and low leakage. Furthermore, a similar response was not observed in other related species cultured in the presence of nitrate. Hence, the nitrate-induced stress response in new anaerobes such as M. multiformis was demonstrated. The response could also be involved in the conservation of menaquinones and the maximization of nitrate reduction.
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Affiliation(s)
- Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba 305-0074, Ibaraki, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba 305-0074, Ibaraki, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba 305-0074, Ibaraki, Japan
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba 305-0074, Ibaraki, Japan
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Haruyama Y, Fukuma E, Yu O, Koshida Y, Sakamoto N, Gen A, Nakagawa R, Nashimoto M, Sakamoto M, Teraoka K, Nakagawa M. Neutrophil to lymphocyte ratio (NLR) may predict survival and efficacy of eribulin in advanced breast cancer patients. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)30699-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Jinno C, Morimoto N, Mahara A, Sakamoto M, Ogino S, Fujisato T, Suzuki S, Yamaoka T. Extracorporeal high-pressure therapy (EHPT) for malignant melanoma consisting of simultaneous tumor eradication and autologous dermal substitute preparation. Regen Ther 2020; 15:187-194. [PMID: 33426218 PMCID: PMC7770419 DOI: 10.1016/j.reth.2020.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/04/2020] [Accepted: 09/11/2020] [Indexed: 02/08/2023] Open
Abstract
Surgical resection of skin tumors leads to large defects in surrounding normal tissues, which should be reconstructed thereafter using the patient's own tissues taken from the other site. Our challenge is to solve this problem in dermal malignant melanoma (MM) by a novel process, named extracorporeal high pressure therapy (EHPT), in which the tissue containing tumor is resected and pressurized, and the treated tissue is re-transplant back to the same position as a tumor-free autologous dermal substitute. The key points are complete tumor death and preservation of native extra cellular matrix (ECM) by the hydrostatic pressure. We found that high hydrostatic pressure at 200 MPa for 10 min at room temperature is completely cytocidal against MM cells in suspension form, in monolayer form, and even in the solid tumor form. MM tumor-bearing nude mice were established by injected human MM cells intradermally and treated by EHTP. The denaturation of the dermal extra cellular matrices was so mild that the pressurized skin was well engrafted as tumor free autologous dermal tissues, resulting in the complete eradication of the MM without any unnecessary skin reconstruction surgery. This very simple and short pressing treatment was proved to make the tumor tissue to the transplantable and tumor-free autologous dermal substitute, which can be applicable to the other temporally resectable tissues.
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Affiliation(s)
- C Jinno
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, 6-1 Kishibe Shin-machi, Suita, Osaka, 564-8565, Japan.,Department of Plastic and Reconstructive Surgery, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyou-ku, Kyoto, 606-8507, Japan
| | - N Morimoto
- Department of Plastic and Reconstructive Surgery, Kansai Medical University, 2-5-1 Shin-machi, Hirakata City, Osaka, 573-1010, Japan
| | - A Mahara
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, 6-1 Kishibe Shin-machi, Suita, Osaka, 564-8565, Japan
| | - M Sakamoto
- Department of Plastic and Reconstructive Surgery, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyou-ku, Kyoto, 606-8507, Japan
| | - S Ogino
- Department of Plastic and Reconstructive Surgery, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyou-ku, Kyoto, 606-8507, Japan
| | - T Fujisato
- Department of Biomedical Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka, 535-8585, Japan
| | - S Suzuki
- Department of Plastic and Reconstructive Surgery, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyou-ku, Kyoto, 606-8507, Japan
| | - T Yamaoka
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, 6-1 Kishibe Shin-machi, Suita, Osaka, 564-8565, Japan
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Ikeyama N, Murakami T, Toyoda A, Mori H, Iino T, Ohkuma M, Sakamoto M. Microbial interaction between the succinate-utilizing bacterium Phascolarctobacterium faecium and the gut commensal Bacteroides thetaiotaomicron. Microbiologyopen 2020; 9:e1111. [PMID: 32856395 PMCID: PMC7568257 DOI: 10.1002/mbo3.1111] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [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: 06/10/2020] [Revised: 07/21/2020] [Accepted: 07/31/2020] [Indexed: 12/17/2022] Open
Abstract
A large variety of microbes are present in the human gut, some of which are considered to interact with each other. Most of these interactions involve bacterial metabolites. Phascolarctobacterium faecium hardly uses carbohydrates for growth and instead uses succinate as a substrate. This study investigated the growth behavior of the co‐culture of the succinate‐specific utilizer P. faecium and the succinogenic gut commensal Bacteroides thetaiotaomicron. Succinate production by B. thetaiotaomicron supported the growth of P. faecium and concomitant propionate production via the succinate pathway. The succinate produced was completely converted to propionate. This result was comparable with the monoculture of P. faecium in the medium supplemented with 1% (w/v) succinate. We analyzed the transcriptional response (RNA‐Seq) between the mono‐ and co‐culture of P. faecium and B. thetaiotaomicron. Comparison of the expression levels of genes of P. faecium between the mono‐ and co‐cultured conditions highlighted that the genes putatively involved in the transportation of succinate were notably expressed under the co‐cultured conditions. Differential expression analysis showed that the presence of P. faecium induced changes in the B. thetaiotaomicron transcriptional pattern, for example, expression changes in the genes for vitamin B12 transporters and reduced expression of glutamate‐dependent acid resistance system‐related genes. Also, transcriptome analysis of P. faecium suggested that glutamate and succinate might be used as sources of succinyl‐CoA, an intermediate in the succinate pathway. This study revealed some survival strategies of asaccharolytic bacteria, such as Phascolarctobacterium spp., in the human gut.
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Affiliation(s)
- Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki, Japan
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Anetai H, Tokita K, Sakamoto M, Midorikawa-Anetai S, Kojima R. Anatomic characterisation of the parietal branches arising from the internal iliac artery in the foetal pig (Sus scrofa domestica). Folia Morphol (Warsz) 2020; 80:549-556. [PMID: 32748947 DOI: 10.5603/fm.a2020.0083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/11/2020] [Accepted: 07/11/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND It is critical for surgeons to have a full understanding of the complex courses and ramifications of the human internal iliac artery and its parietal branches. Although numerous anatomical studies have been performed, not all variations at this site are currently understood. Therefore, we characterised these blood vessels in foetal pigs to provide additional insight from a comparative anatomical perspective. MATERIALS AND METHODS Eighteen half-pelvis specimens from foetal pigs were dissected and examined on macroscopic scale. RESULTS Among our findings, we identified the internal iliac artery as a descending branch of the abdominal aorta. A very thick umbilical artery arose from the internal iliac artery. The superior gluteal, inferior gluteal, and internal pudendal arteries formed the common arterial trunk. Although the superior gluteal artery emerged from the common trunk from inside the pelvis, the inferior gluteal and internal pudendal arteries bifurcated at deep layer within the gluteus muscles after leaving pelvic cavity. We were unable to detect an typical obturator artery emerging from the internal iliac artery. A branch supplying the hip adductors was identified as arising from the inferior epigastric artery which itself was derived from the distal end of the external iliac artery. CONCLUSIONS We identified the anatomic characteristics of the internal iliac artery and its parietal branches in the foetal pig. Our findings provide new insight into the comparative anatomy of the internal iliac artery and will promote understanding of related morphogenetic processes.
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Affiliation(s)
- H Anetai
- Department of Anatomy and Life Structure, School of Medicine, Juntendo University, Tokyo, Japan.
| | - K Tokita
- School of Physical Therapy, Faculty of Health and Medical Care, Saitama Medical University, Saitama, Japan.,Graduate School of Medicine, Saitama Medical University, Saitama, Japan
| | - M Sakamoto
- Graduate School of Medicine, Saitama Medical University, Saitama, Japan
| | - S Midorikawa-Anetai
- School of Physical Therapy, Faculty of Health and Medical Care, Saitama Medical University, Saitama, Japan.,Graduate School of Agricultural and Life Sciences, the University of Tokyo, Japan
| | - R Kojima
- School of Physical Therapy, Faculty of Health and Medical Care, Saitama Medical University, Saitama, Japan
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Liou JS, Huang CH, Ikeyama N, Lee AY, Chen IC, Blom J, Chen CC, Chen CH, Lin YC, Hsieh SY, Huang L, Ohkuma M, Watanabe K, Sakamoto M. Prevotella hominis sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2020; 70:4767-4773. [PMID: 32697186 DOI: 10.1099/ijsem.0.004342] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A strictly anaerobic predominant bacterium, designated as strain gm001T, was isolated from a freshly voided faecal sample collected from a healthy Taiwanese adult. Cells were Gram-stain-negative rods, non-motile and non-spore-forming. Strain gm001T was identified as a member of the genus Prevotella, and a comparison of 16S rRNA and hsp60 gene sequences revealed sequence similarities of 98.5 and 93.3 %, respectively, demonstrating that it was most closely related to the type strain of Prevotella copri. Phylogenomic tree analysis indicated that the gm001T cluster is an independent lineage of P. copri DSM 18205T. The average nucleotide identity, digital DNA‒DNA hybridization and average amino acid identity values between strain gm001T and P. copri DSM 18205T were 80.9, 28.6 and 83.8 %, respectively, which were clearly lower than the species delineation thresholds. The species-specific genes of this novel species were also identified on the basis of pan-genomic analysis. The predominant menaquinones were MK-11 and MK-12, and the predominant fatty acids were anteiso-C15 : 0, C15 : 0 and iso-C15 : 0. Acetate and succinate were produced from glucose as metabolic end products. Taken together, the results indicate that strain gm001T represents a novel species of the genus Prevotella, for which the name Prevotella hominis sp. nov. is proposed. The type strain is gm001T (=BCRC 81118T=JCM 33280T).
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Affiliation(s)
- Jong-Shian Liou
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - Chien-Hsun Huang
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Ai-Yun Lee
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - I-Ching Chen
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - Jochen Blom
- Bioinformatics and Systems Biology, Justus-Liebig-University Giessen, Giessen, 35392, Germany
| | - Chih-Chieh Chen
- Rapid Screening Research Center for Toxicology and Biomedicine, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, ROC
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, ROC
| | - Chia-Hsuan Chen
- Livestock Research Institute, Council of Agriculture, Executive Yuan, Tainan 71246, Taiwan, ROC
| | - Yu-Chun Lin
- Livestock Research Institute, Council of Agriculture, Executive Yuan, Tainan 71246, Taiwan, ROC
| | - Sung-Yuan Hsieh
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - Lina Huang
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Koichi Watanabe
- Department of Animal Science and Technology, College of Bioresources and Agriculture, National Taiwan University, Taipei 10673, Taiwan, ROC
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Rd, Hsinchu 30062, Taiwan, ROC
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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Dekio I, Sakamoto M, Suzuki T, Yuki M, Kinoshita S, Murakami Y, Ohkuma M. Cutibacterium modestum sp. nov., isolated from meibum of human meibomian glands, and emended descriptions of Cutibacterium granulosum and Cutibacterium namnetense. Int J Syst Evol Microbiol 2020; 70:2457-2462. [PMID: 32559834 DOI: 10.1099/ijsem.0.004058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
An anaerobic and aerotolerant bacterium, strain M12T, was isolated from the meibum of inflamed human meibomian glands. Cells of the strain was Gram-stain-positive, non-spore-forming and non-motile rods. Growth on trypticase soy agar plates supplemented with 5 % sheep blood was fastest at 30-37 °C under anaerobic conditions. The 16S rRNA gene sequence of the strain revealed that it belongs to the genus Cutibacterium with a 98.0 % similarity value to the closest species, Cutibacterium acnes. Genome analysis of the strain with type strains of the other Cutibacterium species resulted in digital DNA-DNA hybridization values of 32.3-22.3% and average nucleotide identity (OrthoANI) values of 86.7-73.6 %. Biochemical and physiological analyses using API rapid ID 32A and API Coryne kits revealed relatively low reactivity of the strain compared with C. acnes and Cutibacterium namnetense. The most abundant major cellular fatty acid was iso-C15 : 0. Fermentation end-products from glucose were propionate, lactate, succinate and acetate. The diagnostic diamino acid of the peptidoglycan was meso-diaminopimelic acid. Major menaquinones were MK-9(H4), MK-9(H2) and MK-9. The major peaks of the MALDI-TOF mass spectrometry spectrum were at 3493, 3712, 6986 and 7424 Da. The DNA G+C content was 59.9 mol%. Based on these findings, we propose a novel species, Cutibacterium modestum. The type strain of C. modestum is M12T (=JCM 33380T=DSM 109769T). On the basis of further genomic analysis, we also provide emended descriptions of Cutibacterium granulosum (Prévot 1938) Scholz and Kilian 2016 and Cutibacterium namnetense (Aubin et al. 2016) Nouioui et al. 2018.
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Affiliation(s)
- Itaru Dekio
- Microbe Division / Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan.,Skin Microbe Laboratory, Mildix Skin Clinic, Tokyo, Japan
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Japan.,Microbe Division / Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Tomo Suzuki
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Ophthalmology, Kyoto City Hospital Organization, Kyoto, Japan
| | - Masahiro Yuki
- Microbe Division / Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Shigeru Kinoshita
- Department of Frontier Medical Science and Technology for Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | - Moriya Ohkuma
- Microbe Division / Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan
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Noda S, Koyama F, Aihara C, Ikeyama N, Yuki M, Ohkuma M, Sakamoto M. Lactococcus insecticola sp. nov. and Lactococcus hodotermopsidis sp. nov., isolated from the gut of the wood-feeding lower termite Hodotermopsis sjostedti. Int J Syst Evol Microbiol 2020; 70:4515-4522. [PMID: 32614762 DOI: 10.1099/ijsem.0.004309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Two strains of lactic acid bacteria, designated Hs20B0-1T and Hs30E4-3T, were isolated from the gut of the damp-wood termite Hodotermopsis sjostedti. These strains were characterized genetically and phenotypically. Strain Hs20B0-1T was related to Lactococcus piscium DSM 6634T showing 96.3 and 84.2 % sequence similarity in 16S rRNA gene and rpoB gene sequences, respectively. Strain Hs30E4-3T was related to Lactococcus plantarum DSM 20686T showing 94.8 and 82.2 % sequence similarity in 16S rRNA gene and rpoB gene sequences, respectively. The 16S rRNA gene sequence similarity between strains Hs20B0-1T and Hs30E4-3T was 95.7 %. Furthermore, genomic comparisons using pairwise average nucleotide identity (ANI) and digital DNA-DNA hybridization (DDH) analyses between strain Hs20B0-1T and L. piscium DSM 6634T resulted in values of 73.5 and 20.1 %, respectively. Strain Hs30E4-3T had 72.8 % ANI similarity and 21.3 % DDH similarity to L. plantarum DSM 20686T. Strains Hs20B0-1T and Hs30E4-3T had 75.4 % ANI similarity and 21.1 % DDH similarity to each other. The cell-wall peptidoglycan types of strains Hs20B0-1T and Hs30E4-3T were A4α, Lys-Asp and A3α, Lys-Thr-Ala, respectively. The two strains, Hs20B0-1T and Hs30E4-3T, are distinguishable from each other and other established Lactococcus species phylogenetically and phenotypically. In conclusion, two novel species of the genus Lactococcus are proposed, namely Lactococcus insecticola Hs20B0-1T (=JCM 33485T=DSM 110147T) and Lactococcus hodotermopsidis Hs30E4-3T (=JCM 33486T=DSM 110148T), respectively.
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Affiliation(s)
- Satoko Noda
- Graduate School of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Fumiya Koyama
- Graduate School of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Chihiro Aihara
- Graduate School of Life and Environmental Sciences, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Nao Ikeyama
- Japan Collection of Microorganisms (JCM), RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masahiro Yuki
- Japan Collection of Microorganisms (JCM), RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Japan Collection of Microorganisms (JCM), RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Mitsuo Sakamoto
- Japan Collection of Microorganisms (JCM), RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan.,PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan
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Sakamoto M, Senoh A, Sato Y, Iijima H, Yamaguchi M, Higuchi T, Koyama Y. SAT0119 PARADOXICAL NEUTROPHIL ACTIVATION BY ANTI-IL6 THERAPY: TRANSCRIPTOME ANALYSIS SHOWS A RATIONALE FOR DERMATOLOGICAL ADVERSE REACTIONS AND DECREASED NEUTROPHIL COUNTS AFTER TOCILIZUMAB TREATMENT. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.3900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Skin rashes as a side effect of Tocilizumab therapy (TCZ- Tx) has not been paid much attention, because the incidence was only 1~2% in the drug information sheets. However, we experienced several RA cases with development of various skin rashes associated with neutrophil activation after TCZ-Tx. On the other hand, it is well known that the neutrophil counts in peripheral blood decreases after TCZ-Tx, whereas it does not affect the rate of serious infections. The detailed mechanism is still unclear.Objectives:To detect the characteristics of the changes in gene expressions of peripheral blood associated with TCZ-Tx and the development of skin rashes as its side effect.Methods:Total of 14 RA patients with TCZ-Tx were included. Among them, 4 patients developed TCZ-related rashes (group S) and 10 patients did not show any side effects (group C). Peripheral whole blood at just before (pre) and 3 months after (post) TCZ-Tx from each patient were subjected to the analysis. Total RNAs were extracted with PAXgene miRNA kit and analyzed with next-generation sequencing. First, group C was investigated for the normal response to TCZ-Tx. Differentially expressed genes (DEGs) were selected by paired comparison (post vs. pre). And then, enrichment analysis using gene ontology (GO) terms were performed. Second, to explore the characteristics of group S, all expressed genes in 14 cases at just before TCZ-Tx were subjected to a hierarchical clustering analysis. The DEGs (group S vs. C and post vs. pre) were also investigated with weighted gene co-expression network analysis (WGCNA) and GO analysis. Meanwhile, the total eigengene expressions of the important modules identified by WGCNA in each cases were also calculated.Results:Surprisingly, 8 out of the top 10 enriched GO terms in the up-regulated genes were relevant to leukocyte activation such as ‘neutrophil migration” by the analysis of DEGs (post vs. pre) in group C. The cluster analysis of ‘pre’ genes confirmed that the patterns of gene expression between group S and C was different. WGCNA analysis of DEGs (group S vs. C) revealed that genes related to acute inflammation such as ‘leukocyte mediated immunity’ were activated in group S. Interestingly, it was not correlated with disease activity score (DAS) of RA. By the analysis of DEGs (post vs. pre) of upregulated genes, we found that the total eigengene expressions of the module enriched with genes related to ‘cell adhesion’ or ‘leukocyte migration’ were significantly increased in all cases of group S.Conclusion:This is the first evidence that the genes associated with neutrophil migration is significantly activated after TCZ-Tx. It is noteworthy that the gene activation was observed in cases without any side effects. The decreased neutrophil counts in peripheral blood have been known after initiation of TCZ-Tx, which did not affect the rate of serious infections. Recently, It was reported that TCZ affects neutrophil trafficking to the bone marrow1). Our findings will provide a rationale for its cause. On the other hand, we experienced several RA cases with development of various skin rashes associated with neutrophil activation after TCZ-Tx. However, majority of patients do not develop the side effect, even though genes related to ‘neutrophil migration’ are activated. In group S, our findings indicate that the genes related to ‘leukocyte mediated immunity’ was already activated at the initiation of treatment without correlating to DAS of RA, furthermore, the gene upregulation related to ‘leukocyte migration’ was more prominent after TCZ-Tx. Although it is difficult to predict the patients developing skin rashes before TCZ-Tx, we do not recommend to use TCZ for the patients with neutrophilic dermatosis which is often associated with RA.References: :[1]Lok LSCet al.,Eur J Clin Invest. 47(10):736-745 (2017).Disclosure of Interests: :Moe Sakamoto: None declared, Akemi Senoh: None declared, Yoshiharu Sato: None declared, Hiroshi Iijima: None declared, Mari Yamaguchi: None declared, Toshie Higuchi: None declared, Yoshinobu Koyama Grant/research support from: Eli-Lilly and Mochida., Speakers bureau: BMS, Ayumi, Chugai, Ono, Mitsubishi Tanabe, Abbvie and Eisai.
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Koyama Y, Sato Y, Sakamoto M, Iijima H, Higuchi T. THU0208 AFFECTING COMMON BIOLOGICAL PROCESSES OR DISPARATE?: COMPARISON OF GENE-EXPRESSION MODIFICATION PROFILES AMONG TARGETING IL-6 AND TARGETING SPECIFIC JAK TREATMENTS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.3831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:After accumulation of evidences, it is recognized that inhibition of IL-6 signaling is one of the most established strategies for rheumatoid arthritis (RA) treatment. Tocilizumab (TCZ), an anti-IL6 receptor monoclonal antibody, is the pioneer which blocks IL-6 signaling by preventing IL-6 from binding to both membrane-bound and soluble receptors. Tofacitinib (TOF) inhibits Janus kinase (JAK) 1, JAK3 and, to a lesser extent, JAK2. Recently, Baricitinib (BAR), JAK 1 and JAK2 selective kinase inhibitor, were also approved to treat RA. These JAK inhibitors are known to inhibit cytokine signaling including interleukin (IL)-6. It is very important for clinicians to know whether these treatments affect common biological processes or disparate, because it will provide a rationale for switching each other if one of these treatments resulted in lack of efficacy.Objectives:To compare the gene-expression modification profiles among TOF, BAR and TCZ treatments.Methods:Total of 38 RA cases were analyzed, including TOF (n=15: 6-20mg/d), BAR (n=10: 2-4mg/d) and TCZ (n=13: 8mg/kg/4w or 163mg/2w) treatment groups. Peripheral blood was drawn at just before (pre) and 3 months after (post) these treatments. Total RNAs were then extracted with using PAXgene miRNA kit. After constructing single-stranded, strand-specific libraries, multiplex sequencing was done. After quantifying the expressions of transcripts, differentially expressed genes (DEGs) were selected by paired comparison (post vs. pre), setting thresholds at 2-fold change up/down and less than P=0.05 in paired T-test. And then, hierarchical clustering analysis and enrichment analysis using gene ontology (GO) terms were performed.Results:From the comparison of post- vs. pre-treatment of TOF, BAR and TCZ, the 120 (up-regulated=25/down-regulated=95), 62 (up=20/down=42) and 193 (up=54/ down=139) genes were selected as DEGs respectively. It seems to be discrete depending on the treatment, because overlapped genes were only 1.0% in up-regulated and 5.7% in down-regulated genes. The hierarchical clustering with expression profiles of these DEGs showed major 4 clusters. 92.3% of TCZ and 70% of BAR cases were segregated into 1stand 3rdclusters respectively, while those of TOF cases fell into 2ndand 4thclusters. Disparate GO terms were enriched in each DEGs group. For example, genes relevant to viral defense including ‘response to type I interferon (IFN)’ were suppressed in TOF group. Meanwhile, down regulation of genes involved in phosphorylation process including ‘IL-7 signaling’ seemed to be significant in BAR group. It is noteworthy that terms related to wound healing such as ‘platelet activation’ were enriched in the down-regulated genes of TCZ group.Conclusion:It is speculated that the downstream biological cascade for TOF, BAR and TCZ treatment might be shared, as IL-6 signaling is mediated by JAK1/JAK2/TYK2 activation. However, the influence of these treatments over the transcriptome in the peripheral blood seems to be disparate. Enrichment analysis using GO terms also indicated that different biological processes were involved in the effect of each treatment. Our findings will support a rationale for switching each other if one of these treatments resulted in lack of efficacy. An increased risk of herpes zoster by a treatment with JAK inhibitors has been well recognized. It makes sense because IFN signaling is also mediated by JAK/STAT pathway. On the other hand, we have experienced a case with exacerbation of skin ulcer during TCZ treatment despite the activity of RA was absolutely under control. It is accounted for by the suppression of genes involved in wound healing after TCZ treatment.Disclosure of Interests: :Yoshinobu Koyama Grant/research support from: Eli-Lilly and Mochida., Speakers bureau: BMS, Ayumi, Chugai, Ono, Mitsubishi Tanabe, Abbvie and Eisai., Yoshiharu Sato: None declared, Moe Sakamoto: None declared, Hiroshi Iijima: None declared, Toshie Higuchi: None declared
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Ikeyama N, Toyoda A, Morohoshi S, Kunihiro T, Murakami T, Mori H, Iino T, Ohkuma M, Sakamoto M. Amedibacterium intestinale gen. nov., sp. nov., isolated from human faeces, and reclassification of Eubacterium dolichum Moore et al. 1976 (Approved Lists 1980) as Amedibacillus dolichus gen. nov., comb. nov. Int J Syst Evol Microbiol 2020; 70:3656-3664. [PMID: 32416738 DOI: 10.1099/ijsem.0.004215] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Four strains (9CBEGH2T, 9BBH35, 6BBH38 and 6EGH11) of Gram-stain-positive, obligately anaerobic, rod-shaped bacteria were isolated from faecal samples from healthy Japanese humans. The results of 16S rRNA gene sequence analysis indicated that the four strains represented members of the family Erysipelotrichaceae and formed a monophyletic cluster with 'Absiella argi' strain N6H1-5 (99.4% sequence similarity) and Eubacterium sp. Marseille-P5640 (99.3 %). Eubacterium dolichum JCM 10413T (94.2 %) and Eubacterium tortuosum ATCC 25548T (93.7 %) were located near this monophyletic cluster. The isolates, 9CBEGH2T, 'A. argi' JCM 30884 and Eubacterium sp. Marseille-P5640 shared 98.7-99.1% average nucleotide identity (ANI) with each other. Moreover, the in silico DNA-DNA hybridization (DDH) values among three strains were 88.4-90.6%, indicating that these strains represent the same species. Strain 9CBEGH2T showed 21.5-24.1 % in silico DDH values with other related taxa. In addition, the ANI values between strain 9CBEGH2T and other related taxa ranged from 71.2 % to 73.5 %, indicating that this strain should be considered as representing a novel species on the basis of whole-genome relatedness. Therefore, we formally propose a novel name for 'A. argi' strains identified because the name 'A. argi' has been effectively, but not validly, published since 2017. On the basis of the collected data, strain 9CBEGH2T represents a novel species of a novel genus, for which the name Amedibacterium intestinale gen. nov., sp. nov. is proposed. The type strain of A. intestinale is 9CBEGH2T (=JCM 33778T=DSM 110575T).
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Affiliation(s)
- Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Sho Morohoshi
- TechnoSuruga Laboratory Co. Ltd, 330 Nagasaki, Shimizu-ku, Shizuoka-shi, Shizuoka 424-0065, Japan
| | - Tadao Kunihiro
- TechnoSuruga Laboratory Co. Ltd, 330 Nagasaki, Shimizu-ku, Shizuoka-shi, Shizuoka 424-0065, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan.,Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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Kato H, Shimizu H, Shibue Y, Hosoda T, Iwabuchi K, Nagamine K, Saito H, Sawada R, Oishi T, Tsukiji J, Fujita H, Furuya R, Masuda M, Akasaka O, Ikeda Y, Sakamoto M, Sakai K, Uchiyama M, Watanabe H, Yamaguchi N, Higa R, Sasaki A, Tanaka K, Toyoda Y, Hamanaka S, Miyazawa N, Shimizu A, Fukase F, Iwai S, Komase Y, Kawasaki T, Nagata I, Nakayama Y, Takei T, Kimura K, Kunisaki R, Kudo M, Takeuchi I, Nakajima H. Clinical course of 2019 novel coronavirus disease (COVID-19) in individuals present during the outbreak on the Diamond Princess cruise ship. J Infect Chemother 2020; 26:865-869. [PMID: 32405245 PMCID: PMC7218347 DOI: 10.1016/j.jiac.2020.05.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/02/2020] [Accepted: 05/07/2020] [Indexed: 01/08/2023]
Abstract
We investigated the clinical course of individuals with 2019 novel coronavirus disease (COVID-19) who were transferred from the Diamond Princess cruise ship to 12 local hospitals. The conditions and clinical courses of patients with pneumonia were compared with those of patients without pneumonia. Among 70 patients (median age: 67 years) analyzed, the major symptoms were fever (64.3%), cough (54.3%), and general fatigue (24.3%). Forty-three patients (61.4%) had pneumonia. Higher body temperature, heart rate, and respiratory rate as well as higher of lactate dehydrogenase (LDH), aspartate aminotransferase (AST), and C-reactive protein (CRP) levels and lower serum albumin level and lymphocyte count were associated with the presence of pneumonia. Ground-glass opacity was found in 97.7% of the patients with pneumonia. Patients were administered neuraminidase inhibitors (20%), lopinavir/ritonavir (32.9%), and ciclesonide inhalation (11.4%). Mechanical ventilation and veno-venous extracorporeal membrane oxygenation was performed on 14 (20%) and 2 (2.9%) patients, respectively; two patients died. The median duration of intubation was 12 days. The patients with COVID-19 transferred to local hospitals during the outbreak had severe conditions and needed close monitoring. The severity of COVID-19 depends on the presence of pneumonia. High serum LDH, AST and CRP levels and low serum albumin level and lymphocyte count were found to be predictors of pneumonia. It was challenging for local hospitals to admit and treat these patients during the outbreak of COVID-19. Assessment of severity was crucial to manage a large number of patients.
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Affiliation(s)
- Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Japan; Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Japan.
| | - Hiroyuki Shimizu
- Department of Clinical Laboratory Medicine, Fujisawa City Hospital, Japan
| | - Yasushi Shibue
- Department of Infectious Diseases, Yokohama City Minato Red Cross Hospital, Japan
| | - Tomohiro Hosoda
- Department of Infectious Diseases, Kawasaki Municipal Kawasaki Hospital, Japan
| | - Keisuke Iwabuchi
- Department of General Medicine, Kanagawa Prefectural Ashigarakami Hospital, Japan
| | | | - Hiroki Saito
- Department of Emergency and Critical Care Medicine, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, Japan
| | - Reimin Sawada
- Department of Cardiology, Japanese Red Cross Hadano Hospital, Japan
| | - Takayuki Oishi
- Department of Infection Control and Prevention, Saiseikai Yokohamashi Tobu Hospital, Japan
| | - Jun Tsukiji
- Department of Prevention and Infection Control, Yokohama City University Medical Center, Japan
| | - Hiroyuki Fujita
- Infection Control Committee, Saiseikai Yokohama Nanbu Hospital, Japan
| | - Ryosuke Furuya
- Department of Critical Care and Emergency Medicine, National Hospital Organization Yokohama Medical Center, Japan
| | - Makoto Masuda
- Department of Respiratory Medicine, Fujisawa City Hospital, Japan
| | - Osamu Akasaka
- Emergency Medical Center, Fujisawa City Hospital, Japan
| | - Yu Ikeda
- Emergency Medical Center, Fujisawa City Hospital, Japan
| | - Mitsuo Sakamoto
- Department of Infectious Diseases, Kawasaki Municipal Kawasaki Hospital, Japan
| | - Kazuya Sakai
- Department of Emergency Medicine, Yokohama City University School of Medicine, Japan
| | - Munehito Uchiyama
- Department of Emergency Medicine, Yokohama City University School of Medicine, Japan
| | - Hiroki Watanabe
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Japan
| | | | - Ryoko Higa
- Department of Prevention and Infection Control, Yokohama City University Medical Center, Japan
| | - Akiko Sasaki
- Nursing Department, Japanese Red Cross Hadano Hospital, Japan
| | - Katsuaki Tanaka
- Department of Gastroenterology, Japanese Red Cross Hadano Hospital, Japan
| | - Yukitoshi Toyoda
- Department of Emergency and Critical Care Medicine Major Trauma Center Trauma & Acute Care Surgery, Saiseikai Yokohamashi Tobu Hospital, Japan
| | - Shinsuke Hamanaka
- Department of Pulmonary Medicine, Saiseikai Yokohamashi Tobu Hospital, Japan
| | - Naoki Miyazawa
- Department of Respiratory Medicine, Saiseikai Yokohama Nanbu Hospital, Japan
| | - Atsuko Shimizu
- Infection Control Team, National Yokohama Medical Center, Japan
| | - Fumie Fukase
- Infection Control Team, National Yokohama Medical Center, Japan
| | - Shunsuke Iwai
- Department of Emergency and Critical Care Medicine, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, Japan
| | - Yuko Komase
- Department of Respiratory Internal Medicine, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, Japan
| | - Tsutomu Kawasaki
- Department of Respiratory Medicine, Yokohama City Minato Red Cross Hospital, Japan
| | - Isao Nagata
- Intensive Care Unit, Yokohama City Minato Red Cross Hospital, Japan
| | - Yusuke Nakayama
- Emergency Department, Yokohama City Minato Red Cross Hospital, Japan
| | - Tetsuhiro Takei
- Intensive Care Unit, Yokohama City Minato Red Cross Hospital, Japan
| | - Katsuo Kimura
- Department of Neurology, Yokohama City University Medical Center, Japan
| | - Reiko Kunisaki
- Inflammatory Bowel Disease Center, Yokohama City University Medical Center, Japan
| | - Makoto Kudo
- Respiratory Disease Center, Yokohama City University Medical Center, Japan
| | - Ichiro Takeuchi
- Kanagawa Disaster Medical Assistance Team, Japan; Advanced Emergency Medical Service Center, Yokohama City University Medical Center, Japan
| | - Hideaki Nakajima
- Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Japan
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45
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Tanizawa Y, Kobayashi H, Nomura M, Sakamoto M, Arita M, Nakamura Y, Ohkuma M, Tohno M. Lactobacillus buchneri subsp. silagei subsp. nov., isolated from rice grain silage. Int J Syst Evol Microbiol 2020; 70:3111-3116. [PMID: 32250236 DOI: 10.1099/ijsem.0.004138] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Two Gram-stain-positive, rod-shaped, non-motile, non-spore-forming, catalase-negative bacteria, designated strains SG162T and NK01, were isolated from Japanese rice grain silage and total mixed ration silage, respectively. They were initially identified as Lactobacillus buchneri based on the 16S rRNA gene sequence similarities. However, the two strains were separated into a distinct clade from L. buchneri DSM 20057T (=JCM 1115T) through whole-genome sequence-based characterization, forming an infraspecific subgroup together with strains CD034 and S42, whose genomic sequences were available in the public sequence database. Strains within the subgroup shared 99.4-99.7 % average nucleotide identity (ANI) and 97.5-99.0 % digital DNA-DNA hybridization (dDDH) with each other, albeit 96.9-97.0 % ANI and 76.0-76.6 % dDDH against DSM 20057T. Strains SG162T and NK01 could utilize more substrates as sole carbon sources than DSM 20057T, potentially owing to the abundance of genes involved in carbon metabolism, especially the Entner-Doudoroff pathway. The inability of γ-aminobutyric acid (GABA) production was evidenced by the lack of glutamate decarboxylase and glutamate/GABA antiporter genes in the new subgroup strains. Strain SG162T grew at 10-45 °C (optimum, 30 °C), pH 3.5-8.0, and 0-8 % (w/v) NaCl. Its genomic DNA G+C content was 44.1 mol%. The predominant fatty acids were C16 : 0, C19 : 0 cyclo ω8c, and summed feature 8. On the basis of the polyphasic characterization findings, strains SG162T and NK01 represent a novel subspecies of L. buchneri, for which the name Lactobacillus buchneri subsp. silagei subsp. nov. is proposed. The type strain is SG162T (=JCM 32599T=DSM 107969T), and strains CD034 and S42 are also transferred to L. buchneri subsp. silagei.
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Affiliation(s)
- Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Hisami Kobayashi
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
| | - Masaru Nomura
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-0901, Japan
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masanori Arita
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Yasukazu Nakamura
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masanori Tohno
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
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46
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Kobayashi H, Tanizawa Y, Sakamoto M, Nakamura Y, Ohkuma M, Tohno M. Reclassification of Clostridium diolis Biebl and Spröer 2003 as a later heterotypic synonym of Clostridium beijerinckii Donker 1926 (Approved Lists 1980) emend. Keis et al. 2001. Int J Syst Evol Microbiol 2020; 70:2463-2466. [DOI: 10.1099/ijsem.0.004059] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Clostridium diolis
shares high similarity based on 16S rRNA gene sequences and fatty acid composition with
Clostridium beijerinckii
. In this study, the taxonomic status of
C. diolis
was clarified using genomic and phenotypic approaches. High similarity was detected among
C. diolis
DSM 15410T,
C. beijerinckii
DSM 791T and NCTC 13035T, showing average nucleotide identity on blast and in silico DNA–DNA hybridization values over 97 and 85 %, respectively. Results of investigations for substrate utilization and enzyme activity displayed no striking differences between
C. diolis
DSM 15410T and
C. beijerinckii
JCM 1390T. Based on the results, we propose the reclassification of
Clostridium diolis
as a later heterotypic synonym of
Clostridium beijerinckii
. The type strain is ATCC 25752T (=CIP 104308T=DSM 791T=JCM 1390T=LMG 5716T=NCTC 13035T).
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Affiliation(s)
- Hisami Kobayashi
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Yasukazu Nakamura
- Department of Informatics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masanori Tohno
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Nasushiobara, Tochigi 329-2793, Japan
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47
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Sakamoto M, Ikeyama N, Ogata Y, Suda W, Iino T, Hattori M, Ohkuma M. Alistipes communis sp. nov., Alistipes dispar sp. nov. and Alistipes onderdonkii subsp. vulgaris subsp. nov., isolated from human faeces, and creation of Alistipes onderdonkii subsp. onderdonkii subsp. nov. Int J Syst Evol Microbiol 2020; 70:473-480. [PMID: 31633480 DOI: 10.1099/ijsem.0.003778] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Three groups of Gram-stain-negative, obligately anaerobic, rod or coccoid-shaped bacteria, which were phylogenetically assigned in the genus Alistipes belonging to the family Rikenellaceae in the phylum Bacteroidetes, were isolated from the faecal samples of healthy Japanese humans. Group I (strains 5CBH24T and 6CPBBH3) showed highest 16S rRNA gene sequence similarity to 'Alistipes obesi' ph8T (99.73 %). Group II (strain 5CPEGH6T) was related to Alistipes shahii WAL 8301T (96.82 %). Ten strains of group III (3BBH6T, 5CPYCFAH4, 5NYCFAH2 and others) were related to Alistipes onderdonkii DSM 19147T (98.96 %). Group I could be differentiated from other strains by the ability to hydrolyse aesculin and the lack of catalase activity. Strain 5CPEGH6T could be differentiated from A. shahii JCM 16773T by the inability to hydrolyse aesculin and the lack of catalase activity, and so on. Phenotypic characteristics of group III were similar to those of A. onderdonkii JCM 16771T. Strains 5CBH24T, 6CPBBH3 and 'A. obesi' ph8T shared 98.8-98.9 % average nucleotide identity (ANI) with each other. In addition, the in silico DNA-DNA hybridization (DDH) values among three strains were 86.7-89.4 %. Strain 5CPEGH6T showed relatively low values (≤ 84.4 % for ANI ; ≤26.2 % for DDH) with other strains. Three strains in the group III (3BBH6T, 5CPYCFAH4 and 5NYCFAH2) shared 97.9-99.9% ANI with each other. These three strains showed 96.9-97.3 % ANI with A. onderdonkii DSM 19147T. The DDH values of strains 3BBH6T, 5CPYCFAH4 and 5NYCFAH2 among themselves were 80.5-99.8 %, while those compared to A. onderdonkii DSM 19147T were 71.0-73.4 %. On the basis of the collected data, three novel species, Alistipes communis sp. nov. (5CBH24T=JCM 32850T=DSM 108979T), Alistipes dispar sp. nov. (5CPEGH6T=JCM 32848T=DSM 108978T) and Alistipes onderdonkii subsp. vulgaris subsp. nov. (3BBH6T=JCM 32839T=DSM 108977T), are proposed.
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Affiliation(s)
- Mitsuo Sakamoto
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan.,Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Yusuke Ogata
- Laboratory for Microbiome Sciences, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehirocho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Wataru Suda
- Laboratory for Microbiome Sciences, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehirocho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masahira Hattori
- Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.,Laboratory for Microbiome Sciences, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehirocho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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48
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Hosoda T, Sakamoto M, Orikasa H, Kubomura A, Misaki T, Okabe N. Septic Meningitis and Liver Abscess due to Hypermucoviscous Klebsiella pneumoniae Complicated with Chronic Strongyloidiasis in a Human T-lymphotropic Virus 1 Carrier. Intern Med 2020; 59:129-133. [PMID: 31434825 PMCID: PMC6995716 DOI: 10.2169/internalmedicine.3403-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Recently, severe cases of infection due to hypermucoviscous Klebsiella pneumonia (hmKP) have been reported in Japan. The Amami Islands in Japan are also endemic regions for Strongyloides stercoralis. Disseminated strongyloidiasis strain often causes severe enterobacteria infection; however, whether or not chronic strongyloidiasis induces it remains unclear. We herein report a 71-year-old man who developed meningitis and liver abscess due to hmKP complicated with chronic strongyloidiasis. He died on the seventh hospital day. Strongyloides stercoralis were only found around the polyp in the cecum. Chronic strongyloidiasis can also induce severe infection due to enterobacteria, especially hypervirulent pathogens like hmKP, through the induction of mucosal rupture.
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Affiliation(s)
- Tomohiro Hosoda
- Department of Infectious Disease, Kawasaki Municipal Kawasaki Hospital, Japan
| | - Mitsuo Sakamoto
- Department of Infectious Disease, Kawasaki Municipal Kawasaki Hospital, Japan
| | - Hideki Orikasa
- Department of Pathology, Kawasaki Municipal Kawasaki Hospital, Japan
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49
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Sakamoto M, Ikeyama N, Toyoda A, Murakami T, Mori H, Iino T, Ohkuma M. Dialister hominis sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2020; 70:589-595. [DOI: 10.1099/ijsem.0.003797] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
- PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Ibaraki 305-0074, Japan
| | - Nao Ikeyama
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Takumi Murakami
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Hiroshi Mori
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Takao Iino
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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50
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Affiliation(s)
- Tomohiro Hosoda
- Department of Infectious Disease, Kawasaki Municipal Kawasaki Hospital, Japan
| | - Mitsuo Sakamoto
- Department of Infectious Disease, Kawasaki Municipal Kawasaki Hospital, Japan
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