Kozo Asano

Hokkaido University

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Co-Authors

Teruo Sone

Hokkaido University

Fusao Tomita

Hokkaido University

Michiko Tanaka

Miyazaki Prefectural Nursing University

Atsushi Yokota

Hokkaido University

Ayumi Abe

Hokkaido University

Hiroshi Hara

Fuji Women's University

I Nengah Sujaya

Udayana University

Isao Kawamoto

Biomedical Research Laboratories (United States)

Wataru Kitagawa

National Institute of Advanced Industrial Science and Technology

Yoichi Kamagata

National Institute of Advanced Industrial Science and Technology

Cooperative Institutions

Hokkaido University

132

The University of Tokyo

Kyowa Kirin (Japan)

National Institute of Advanced Industrial Science and Technology

Hokkaido Agricultural Research Center

Osaka University

Kyowa Hakko Kirin (Singapore)

Kyoto University

North Advancement Center for Science and Technology

Tohoku University

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1112 Identification of Lactic Acid Bacteria Isolated from Urutan by Using Polymerase Chain Reaction-Amplified Variable Regions of 16S rDNA

日本生物工学会大会講演要旨集 (2000)

Nyoman Semadi Antara I Nengah Sujaya Atsushi Yokota Kozo Asano Wayan Redi Aryanta

Identification

Source

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Citations (0)

Draft Genome Sequence of Methanol-Utilizing Methylophilus sp. Strain OH31, Isolated from Pond Sediment in Hokkaido, Japan

Genome Announcements (2014)

Takahiro Kugo Wataru Kitagawa Yoshinori Shimomura Takuya Yamagishi Michiko Tanaka

Methylophilus sp. strain OH31 was isolated from the sediment of the Ohno pond at Hokkaido University. Strain OH31 utilizes methanol as its energy source. Here, we present the draft genome sequence of Methylophilus sp. strain OH31.

Strain (injury)

Sequence (biology)

10.1128/genomea.00274-14

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Citations (3)

403 Detection of novel thermotolerant species, Lactobacillus thermotolerans, in human and animal faeces by culture-independent molecular techniques

日本生物工学会大会講演要旨集 (2002)

Piyanuch Niamsup Akarat Suksomcheep Kozo Asano Fusao Tomita Atsushi Yokota

Animal Species

Human feces

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Citations (0)

Characterization of Multi-antibiotic-resistant <i>Escherichia coli</i> Isolated from Beef Cattle in Japan

Microbes and Environments (2014)

Shiori Yamamoto Motoki Nakano Wataru Kitagawa Michiko Tanaka Teruo Sone

The emergence of multiple-antibiotic-resistance bacteria is increasing, which is a particular concern on livestock farms. We previously isolated 1,347 antimicrobial-resistant (AMR) Escherichia coli strains from the feces of beef cattle on 14 Japanese farms. In the present study, the genetic backgrounds and phylogenetic relationships of 45 AMR isolates were characterized by the chromosome phylotype, AMR phenotype, AMR genotype, and plasmid type. These isolates were classified into five chromosome phylotypes, which were closely linked to the farms from which they were isolated, suggesting that each farm had its own E. coli phylotype. AMR phenotype and plasmid type analyses yielded 8 and 14 types, all of which were associated with the chromosomal phylotype and, thus, to the original farms. AMR genotype analysis revealed more variety, with 16 types, indicating both inter- and intra-farm diversity. Different phylotype isolates from the same farm shared highly similar plasmid types, which indicated that plasmids with AMR genes could be transferred between phylotypes, thereby generating multi-antibiotic-resistant microorganisms. This ecological study demonstrated that the chromosome phylotype was strongly correlated with the farm from which they were isolated, while the AMR phenotype, genotype, and plasmid type were generally correlated with the chromosome phylotype and farm source.

Phylotype

10.1264/jsme2.me13173

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Citations (28)

K-254-I (Genistein), a New Inhibitor of Ca²⁺and Calmodulin- Dependent Cyclic Nucleotide Phosphodiesterase fromStreptosporangium vulgare

Agricultural and Biological Chemistry (1987)

Joji Goto Yuzuru Matsuda Kozo Asano Isao Kawamoto Tohru Yasuzawa

A new calmodulin antagonist, genistein, was isolated from the culture broth of Strepto-sporangium vulgare K-254. The spectral data of K-254-I indicated that the compound was identical with genistein, 4/,5,7-trihydroxyisoflavone. Genistein inhibited the Ca2+/calmodulin-depen- dent activity of cyclic nucleotide phosphodiesterase from bovine brain (IC50 = 20 μΜ) without appreciably affecting its basal activity. The inhibitory activity of genistein was antagonized by higher concentrations of calmodulin. Although phosphatidylserine did not reverse the inhibition of calmodulin, genistein inhibited the phospholipid-sensitive, Ca2 +-dependent protein kinase (protein kinase C) from bovine brain (IC50 = 35.3 μΜ). The activity of cAMP-dependent protein kinase was not affected by 700 μΜ of genistein.

Cyclic nucleotide phosphodiesterase

Biochanin A

10.1080/00021369.1987.10868504

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Citations (6)

Pediococcus pentosaceus NB-17 for probiotic use

Journal of Bioscience and Bioengineering (2008)

Benjamas Jonganurakkun Qi Wang Shan Xu Yuya Tada Kimiko Minamida

Pediococcus

10.1263/jbb.106.69

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Citations (54)

Comparison of Yacon (<i>Smallanthus sonchifolius</i>) Tuber with Commercialized Fructo-oligosaccharides (FOS) in Terms of Physiology, Fermentation Products and Intestinal Microbial Communities in Rats

Bioscience of Microbiota Food and Health (2013)

Ni Wayan Arya Utami Teruo Sone Michiko Tanaka Cindy H. Nakatsu Akihiko Saito

The yacon (Smallanthus sonchifolius) tuber was examined with regard to its prebiotic effects compared with commercialized fructo-oligosaccharides (FOS). A feed containing 10% yacon tuber, which is equivalent to 5% commercialized FOS in terms of the amount of fructo-oligosaccharides (GF2, GF3 and GF4), was administrated to rats for 28 days. The yacon diet changed the intestinal microbial communities beginning in the first week, resulting in a twofold greater concentration of cecal short-chain fatty acids (SCFAs). The SCFA composition differed, but the cecal pH in rats fed yacon tuber was equal to that in rats fed FOS. Serum triglycerides were lower in rats fed yacon compared with rats fed FOS and the control diet. Cecal size was greater with the yacon tuber diet compared with the control diet. The abundant fermentation in the intestines created a selective environment for the intestinal microbiota, which included Lactobacillus acidophilus, Bifidobacterium pseudolongum, Bifidobacterium animalis and Barnesiella spp. according to identification with culture-independent analysis, 16S rRNA gene PCR-DGGE combined with cloning and sequencing. Barnesiella spp. and B. pseudolongum were only found in the rats fed the yacon diet, while L. acidophilus and B. animalis were found in abundance in rats fed both the yacon and FOS diets. The genus Barnesiella has not previously been reported to be associated with yacon or FOS fermentation. We concluded that the physiological and microbiological effects of the yacon tuber were different from those of FOS. Differences in cecal size, blood triglycerides and microbial community profiles including their metabolites (SCFAs) between the yacon tuber and FOS were shown to be more greatly affected by the yacon tuber rather than FOS.

Yacón

Bifidobacterium animalis

Prebiotic

Short-chain fatty acid

Cecum

10.12938/bmfh.32.167

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Citations (11)

Identification and Characterization ofRhizot, a Novel LTR Retrotransposon ofRhizopus oryzaeandR. delemar

Bioscience Biotechnology and Biochemistry (2009)

Ayumi Abe Kozo Asano Teruo Sone

A novel retrotransposon Rhizot was identified in Rhizopus oryzae and R. delemar. Rhizot has a unique structure that consists of a pol ORF similar to non-LTR (long terminal repeat) retorotransposons between two LTRs. Rhizot was distributed in all Rhizopus species tested. The Rhizot pol gene was transcribed in the liquid culture, and was induced by UV and oxidative stress.

Retrotransposon

Rhizopus oryzae

Rhizopus

10.1271/bbb.90017

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Citations (3)

Conductive Iron Oxides Promote Methanogenic Acetate Degradation by Microbial Communities in a High-Temperature Petroleum Reservoir

Microbes and Environments (2019)

Souichiro Kato Kaoru Wada Wataru Kitagawa Daisuke Mayumi Masayuki Ikarashi

Supplementation with conductive magnetite particles promoted methanogenic acetate degradation by microbial communities enriched from the production water of a high-temperature petroleum reservoir. A microbial community analysis revealed that Petrothermobacter spp. (phylum Deferribacteres), known as thermophilic Fe(III) reducers, predominated in the magnetite-supplemented enrichment, whereas other types of Fe(III) reducers, such as Thermincola spp. and Thermotoga spp., were dominant under ferrihydrite-reducing conditions. These results suggest that magnetite induced interspecies electron transfer via electric currents through conductive particles between Petrothermobacter spp. and methanogens. This is the first evidence for possible electric syntrophy in high-temperature subsurface environments.

Ferrihydrite

Degradation

10.1264/jsme2.me18140

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Citations (15)

Main microorganisms involved in the fermentation of Ugandan ghee

International Journal of Food Microbiology (2009)

Martin Patrick Ongol Kozo Asano

Lactobacillus brevis

Lactobacillus paracasei

Geotrichum

Kluyveromyces marxianus

Acetobacter

10.1016/j.ijfoodmicro.2009.06.003

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Citations (49)