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Okuyama H, Kiyoshi T, Takahashi JI, Tsubaki Y. A comparison of complete mitochondrial DNA sequences of Mnais costalis Selys, 1869 (Odonata: Calopterygidae) from three different populations (one allopatric and two sympatric). Mitochondrial DNA B Resour 2019; 4:3104-3105. [PMID: 33365872 PMCID: PMC7707004 DOI: 10.1080/23802359.2019.1667888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 08/16/2019] [Indexed: 10/29/2022] Open
Abstract
In Japan, two closely-related damselflies, Mnais costalis Selys, 1869 (Odonata: Calopterygidae) and M. pruinosa Selys-Longchamps (Odonata: Calopterygidae), 1853, coexist, and they exhibit geographic variations in wing color, body size, and habitat preference. In this study, we analyzed the complete mitochondrial genome of M. costalis from Saga Prefecture, Japan (sympatric populations that exhibit wing color polymorphism), and compared the genome with M. costalis that exhibit monomorphic orange wing color. The mitochondrial genome of M. costalis from Saga Prefecture was identified as a circular molecule of 15,488 bp, similar to that found in other M. costalis populations. It was predicted to contain 13 protein-coding (PCG), 22 tRNA, and two rRNA genes, along with one A + T-rich control region. Among the PCGs, ATP8 and ATP6, ATP6 and COIII, ND4 and ND4L, and ND6 and Cytb shared seven, one, seven, and one nucleotides, respectively. The initiation codon ATG was found in eight genes, ATC in four, and ATT in one, while the termination codons TAA, TAG, TA, and T were observed in seven, one, two, and three genes, respectively. All the tRNA genes possessed a cloverleaf secondary structure, except for tRNA-His that lacks the TΨC loop. The average AT content of mitochondrial genome was 66.06%. From a phylogenetic analysis, the loss of wing color polymorphism in monomorphic sympatric populations is likely to occur with the coexistence of two Mnais species.
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Affiliation(s)
- Hisashi Okuyama
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tokyo, Japan
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Okuyama H, Kiyoshi T, Takahashi JI, Tsubaki Y. Complete mitochondrial genome sequence of the broad-winged damselfly, Mnais pruinosa Selys, 1853 (Odonata: Calopterygidae). Mitochondrial DNA B Resour 2019; 4:3101-3103. [PMID: 33365871 PMCID: PMC7706464 DOI: 10.1080/23802359.2019.1667887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In this study, we analyzed the complete mitochondrial genome of the Mnais pruinosa Selys, 1853 from Saga Prefecture, Japan. The mitochondrial genome of M. pruinosa was identified as a circular molecule of 15,494 bp, and was found to be similar to that of other damselfly species. It was predicted to contain 13 protein-coding (PCG), 22 tRNA, and two rRNA genes, as well as one A + T-rich control region. The genes ATP8 and ATP6 shared seven nucleotides, ATP6 and COIII shared one nucleotide, ND4 and ND4L shared seven nucleotides, and ND6 and Cytb shared one nucleotide. The initiation codon ATG was found in eight genes, ATC in four, and ATT in one; the termination codons TAA, TAG, incomplete TA, and single T were observed in seven, one, two, and three genes, respectively. All the tRNA genes possessed a cloverleaf secondary structure, except for tRNA-His that lacks the TΨC loop. The average AT content of mitochondrial genome was 66.18%.
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Affiliation(s)
- Hisashi Okuyama
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tokyo, Japan
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Takahashi J, Okuyama H, Kiyoshi T, Takeuchi T, Martin SJ. Origins of Vespa velutina hornets that recently invaded Iki Island, Japan and Jersey Island, UK. Mitochondrial DNA A DNA Mapp Seq Anal 2018; 30:434-439. [PMID: 30489182 DOI: 10.1080/24701394.2018.1538366] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The native distribution of the yellow-legged hornet, Vespa velutina, is throughout East Asia. Around 15 years ago this species was accidentally introduced into South Korea and France, where it became established and then spread into neighbouring countries. Previous mitochondrial DNA studies showed that the South Korean, Japanese, and French populations all originated from Eastern China. Recently, the hornet has invaded Iki Island, Japan and Jersey Island, UK. In this study, we analyze the complete mitochondrial DNA sequence of V. velutina to trace the origin of these two populations. The mitochondrial DNA haplotypes (COI, Cytb, and 16S rRNA) of V. velutina in Iki Island matched the unique haplotype present in China, South Korea, and Japan, while the haplotype from Jersey Island matched that of V. velutina found in France and China. These findings were supported by data from the complete mitochondrial DNA sequence of V. velutina from Iki Island, which was consistent with the sequence from South Korea and Tsushima, whereas V. velutina in Jersey was most similar to the French population.
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Affiliation(s)
- J Takahashi
- a Faculty of Life Sciences , Kyoto Sangyo University , Kyoto , Japan
| | - H Okuyama
- a Faculty of Life Sciences , Kyoto Sangyo University , Kyoto , Japan
| | - T Kiyoshi
- b Department of Zoology , National Museum of Nature and Science , Tsukuba , Japan
| | - T Takeuchi
- a Faculty of Life Sciences , Kyoto Sangyo University , Kyoto , Japan
| | - S J Martin
- c School of Environment and Life Sciences, The University of Salford , Manchester , UK
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Shinmura Y, Okuyama H, Kiyoshi T, Lin CP, Kadowaki T, Takahashi JI. The complete mitochondrial genome and genetic distinction of the Taiwanese honeybee, Apis cerana (Hymenoptera: Apidae). CONSERV GENET RESOUR 2017. [DOI: 10.1007/s12686-017-0879-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Takahashi R, Okuyama H, Kiyoshi T, Takahashi JI. Complete mitochondrial DNA sequence of the invasive hornet Vespa velutina (Insecta, Hymenoptera) found in Japan. Mitochondrial DNA B Resour 2017; 2:143-144. [PMID: 33473746 PMCID: PMC7799611 DOI: 10.1080/23802359.2017.1289353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
In this study, we analyzed the complete mitochondrial genome of the invasive Asian hornet Vespa velutina from Japan. The mitochondrial genome of V. velutina was identified as a circular molecule of 16,765 bp, similar to that in other hornet species. It was predicted to contain 13 protein-coding, 20 tRNA, and two rRNA genes, along with one A + T-rich control region. The initiation codons ATC was found in one, ATG in four, ATT in five, and ATA in three genes, while TAA was the termination codon in all these genes. The average AT content of 13 protein-coding was 82%.
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Affiliation(s)
| | - Hisashi Okuyama
- Department of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tokyo, Japan
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Wakamiya T, Tingek S, Okuyama H, Kiyoshi T, Takahashi JI. The complete mitochondrial genome of the cavity-nesting honeybee, Apis koschevnikovi (Insecta: Hymenoptera: Apidae). Mitochondrial DNA B Resour 2017; 2:24-25. [PMID: 33490434 PMCID: PMC7800373 DOI: 10.1080/23802359.2016.1275847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
In this study, we analyzed the complete mitochondrial genome of the cavity-nesting honeybee, A. koschevnikovi. The mitochondrial genome of A. koschevnikovi was observed to be a circular molecule of 15,278 bp and was similar to that of the other cavity-nesting honeybee species. The average AT content in the A. koschevnikovi mitochondrial genome was 84%. It was predicted to contain 13 protein-coding, 24 tRNA and two rRNA genes, along with one A + T-rich control region, besides three tRNA-Met repeats.
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Affiliation(s)
- Takeshi Wakamiya
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Salim Tingek
- Agriculture Research Station Tenom, Tenom, Sabah, Malaysia
| | - Hisashi Okuyama
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tsukuba, Ibaraki, Japan
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Nishimoto M, Okuyama H, Kiyoshi T, Nomura T, Takahashi JI. Complete mitochondrial genome of the Japanese bumblebee, Bombus hypocrita hypocrita (Insecta: Hymenoptera: Apidae). Mitochondrial DNA B Resour 2017; 2:19-20. [PMID: 33473702 PMCID: PMC7800507 DOI: 10.1080/23802359.2016.1275849] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In the present report, we describe the complete mitochondrial genome of the common bumblebee, Bombus hypocrita hypocrita, from the Otome Plateau, in Yamanashi Prefecture, Japan. The mitochondrial genome of B. h. hypocrita is a circular molecule of 15,795 bp. It contains 13 protein-coding, 22 tRNA and two rDNA genes. The protein-coding genes had ATA, ATG or ATT as the initiation codon and were terminated by the typical stop codon TAA, except for ND4 and Cytb. All the tRNA genes typically formed a cloverleaf secondary structure, except for trnE and trnS1.
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Affiliation(s)
- Mana Nishimoto
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Hisashi Okuyama
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tokyo, Japan
| | - Tetsuro Nomura
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
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Shinohara A, Kameda Y, Ibuki SI, Kiyoshi T, Kakuda T, Kojima H. Pamphilius ishikawai feeds on Astilbe: the first record of Pamphiliidae (Hymenoptera) associated with Saxifragaceae. Zootaxa 2016; 4098:167-78. [PMID: 27394580 DOI: 10.11646/zootaxa.4098.1.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Indexed: 11/04/2022]
Abstract
Based on field observations and rearing experiments in Nagano and Tochigi prefectures in central Honshu, Japan, host plants and life history of a leaf-rolling sawfly, Pamphilius ishikawai Shinohara, 1979, are recorded for the first time. The larva is a solitary leaf-roller on Astilbe. This is the first record of the Saxifragaceae as a host plant of the Pamphiliidae. We made molecular phylogenetic analysis using mitochondrial cytochrome oxidase subunit 1 (COI) gene sequences for nine individuals of P. ishikawai feeding on three different species of Astilbe in two localities with different climates and for six outgroup pamphiliine species. It revealed very small genetic variability within P. ishikawai and suggested probable monophyly of the P. sulphureipes group.
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Affiliation(s)
- Akihiko Shinohara
- Department of Zoology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki, 305-0005 Japan.;
| | - Yuichi Kameda
- Center for Molecular Biodiversity Research, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki, 305-0005 Japan.;
| | | | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki, 305-0005 Japan.;
| | - Tsuneo Kakuda
- Department of Legal Medicine, Faculty of Medicine, University of Yamanashi, 1110, Shimogato, Chuo, Yamanashi, 409-3898 Japan.;
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Takahashi JI, Nishimoto M, Wakamiya T, Takahashi M, Kiyoshi T, Tsuchida K, Nomura T. Complete mitochondrial genome of the Japanese bumblebee, Bombus hypocrita sapporensis (Insecta: Hymenoptera: Apidae). Mitochondrial DNA B Resour 2016; 1:224-225. [PMID: 33473459 PMCID: PMC7800672 DOI: 10.1080/23802359.2016.1155423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 02/15/2016] [Accepted: 02/15/2016] [Indexed: 11/27/2022] Open
Abstract
In the present study, we describe the complete mitochondrial genome of the bumblebee, Bombus hypocrita sapporensis from the Rebun Island, in Hokkaido, Japan. The mitochondrial genome of B. hypocrita sapporensis includes a circular molecule of 15 700 bp. It contains 13 protein-coding genes, 22 tRNA genes, two rDNA genes and an A + T-rich control region. All protein-coding genes are initiated by ATA, ATG, and ATT codons and are terminated by the typical stop codon TAA or T, except for ND4L, which ends with TA. All tRNA genes typically form a cloverleaf secondary structure.
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Affiliation(s)
| | - Mana Nishimoto
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takeshi Wakamiya
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Moe Takahashi
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tokyo, Japan
| | - Koji Tsuchida
- Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Tetsuro Nomura
- Department of Life sciences, Kyoto Sangyo University, Kyoto, Japan
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Takahashi JI, Wakamiya T, Kiyoshi T, Uchiyama H, Yajima S, Kimura K, Nomura T. The complete mitochondrial genome of the Japanese honeybee, Apis cerana japonica (Insecta: Hymenoptera: Apidae). Mitochondrial DNA B Resour 2016; 1:156-157. [PMID: 33473444 PMCID: PMC7800529 DOI: 10.1080/23802359.2016.1144108] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In this study, we analyzed the complete mitochondrial genome of the Japanese honeybee Apis cerana japonica. The mitochondrial genome of A. c. japonica is a circular molecule of 15 917 bp and is similar to that of A. c. cerana. It contains 13 protein-coding genes, 22 tRNA genes, two rRNA genes and one A + T-rich control region. All protein-coding genes are initiated by ATT and ATG codons and are terminated by the typical stop codon TAA or TAG, except for the start codon of ATP8 which ends with C. All tRNA genes typically form a cloverleaf secondary structure, except for tRNA-Ser (AGN).
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Affiliation(s)
| | - Takeshi Wakamiya
- Department of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Takuya Kiyoshi
- Department of Zoology, National Museum of Nature and Science, Tokyo, Japan
| | - Hironobu Uchiyama
- NODAI Genome Research Center, Tokyo University of Agriculture, Tokyo, Japan
| | - Shunsuke Yajima
- NODAI Genome Research Center, Tokyo University of Agriculture, Tokyo, Japan.,Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Kiyoshi Kimura
- Honeybee Research Group, Animal Breeding and Reproduction Research Team, National Institute of Livestock and Grassland Science, Tsukuba, Japan
| | - Tetsuro Nomura
- Department of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
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Hatayama Y, Hashimoto T, Kohayakawa H, Kiyoshi T, Nakamichi K, Kinoshita T, Yoshida N. In vivo pharmacological characterization of AC-3933, a benzodiazepine receptor partial inverse agonist for the treatment of Alzheimer's disease. Neuroscience 2014; 265:217-25. [PMID: 24513386 DOI: 10.1016/j.neuroscience.2014.01.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/23/2014] [Accepted: 01/30/2014] [Indexed: 10/25/2022]
Abstract
GABAergic neurons are known to inhibit neural transduction and therefore negatively affect excitatory neural circuits in the brain. We have previously reported that 5-(3-methoxyphenyl)-3-(5-methyl-1,2,4-oxadiazol-3-yl)-1,6-naphthyridin-2(1H)-one (AC-3933), a partial inverse agonist for the benzodiazepine receptor (BzR), reverses GABAergic inhibitory effect on cholinergic neurons, and thus enhances acetylcholine release from these neurons in rat hippocampal slices. In this study, we evaluated AC-3933 potential for the treatment of Alzheimer's disease, a disorder characterized by progressive decline mainly in cholinergic function. Oral administration of AC-3933 (0.01-0.03mg/kg) resulted in the amelioration of scopolamine-induced amnesia, as well as a shift in electroencephalogram (EEG) relative power characteristic of pro-cognitive cholinergic activators, such as donepezil. In addition, treatment with AC-3933 even at the high dose of 100mg/kg p.o. produced no seizure or anxiety, two major adverse effects of BzR inverse agonists developed in the past. These findings indicate that AC-3933 with its low risk for side effects may be useful in the treatment of Alzheimer's disease.
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Affiliation(s)
- Y Hatayama
- Drug Development Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan.
| | - T Hashimoto
- Drug Development Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
| | - H Kohayakawa
- Innovative Drug Discovery Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
| | - T Kiyoshi
- Drug Development Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
| | - K Nakamichi
- Drug Development Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
| | - T Kinoshita
- Research Administration, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
| | - N Yoshida
- Innovative Drug Discovery Laboratories, Dainippon Sumitomo Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
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Hashimoto T, Kiyoshi T, Kohayakawa H, Iwamura Y, Yoshida N. Pharmacological properties of AC-3933, a novel benzodiazepine receptor partial inverse agonist. Neuroscience 2014; 256:352-9. [DOI: 10.1016/j.neuroscience.2013.10.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Kiyoshi T, Takahashi JI, Yamanaka T, Tanaka K, Hamasaki K, Tsuchida K, Tsubaki Y. Taxonomic uncertainty of a highly endangered brook damselfly, Copera tokyoensis Asahina, 1948 (Odonata: Platycnemididae), revealed by the mitochondrial gene genealogy. CONSERV GENET 2011. [DOI: 10.1007/s10592-011-0189-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yanagisawa Y, Nakagome H, Tennmei K, Hamada M, Yoshikawa M, Otsuka A, Hosono M, Kiyoshi T, Takahashi M, Yamazaki T, Maeda H. Operation of a 500 MHz high temperature superconducting NMR: towards an NMR spectrometer operating beyond 1 GHz. J Magn Reson 2010; 203:274-82. [PMID: 20149698 DOI: 10.1016/j.jmr.2010.01.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 01/14/2010] [Accepted: 01/15/2010] [Indexed: 05/15/2023]
Abstract
We have begun a project to develop an NMR spectrometer that operates at frequencies beyond 1 GHz (magnetic field strength in excess of 23.5 T) using a high temperature superconductor (HTS) innermost coil. As the first step, we developed a 500 MHz NMR with a Bi-2223 HTS innermost coil, which was operated in external current mode. The temporal magnetic field change of the NMR magnet after the coil charge was dominated by (i) the field fluctuation due to a DC power supply and (ii) relaxation in the screening current in the HTS tape conductor; effect (i) was stabilized by the 2H field-frequency lock system, while effect (ii) decreased with time due to relaxation of the screening current induced in the HTS coil and reached 10(-8)(0.01 ppm)/h on the 20th day after the coil charge, which was as small as the persistent current mode of the NMR magnet. The 1D (1)H NMR spectra obtained by the 500 MHz LTS/HTS magnet were nearly equivalent to those obtained by the LTS NMR magnet. The 2D-NOESY, 3D-HNCO and 3D-HNCACB spectra were achieved for ubiquitin by the 500 MHz LTS/HTS magnet; their quality was closely equivalent to that achieved by a conventional LTS NMR. Based on the results of numerical simulation, the effects of screening current-induced magnetic field changes are predicted to be harmless for the 1.03 GHz NMR magnet system.
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Affiliation(s)
- Y Yanagisawa
- Systems and Structural Biology Center, RIKEN, Yokohama 230-0045, Japan
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Kiyoshi T. Differentiation of golden-ringed dragonfly Anotogaster sieboldii (Selys, 1854) (Cordulegastridae: Odonata) in the insular East Asia revealed by the mitochondrial gene genealogy with taxonomic implications. J ZOOL SYST EVOL RES 2008. [DOI: 10.1111/j.1439-0469.2007.00445.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wakayama NI, Yin DC, Harata K, Kiyoshi T, Fujiwara M, Tanimoto Y. Macromolecular crystallization in microgravity generated by a superconducting magnet. Ann N Y Acad Sci 2007; 1077:184-93. [PMID: 17124123 DOI: 10.1196/annals.1362.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
About 30% of the protein crystals grown in space yield better X-ray diffraction data than the best crystals grown on the earth. The microgravity environments provided by the application of an upward magnetic force constitute excellent candidates for simulating the microgravity conditions in space. Here, we describe a method to control effective gravity and formation of protein crystals in various levels of effective gravity. Since 2002, the stable and long-time durable microgravity generated by a convenient type of superconducting magnet has been available for protein crystal growth. For the first time, protein crystals, orthorhombic lysozyme, were grown at microgravity on the earth, and it was proved that this microgravity improved the crystal quality effectively and reproducibly. The present method always accompanies a strong magnetic field, and the magnetic field itself seems to improve crystal quality. Microgravity is not always effective for improving crystal quality. When we applied this microgravity to the formation of cubic porcine insulin and tetragonal lysozyme crystals, we observed no dependence of effective gravity on crystal quality. Thus, this kind of test will be useful for selecting promising proteins prior to the space experiments. Finally, the microgravity generated by the magnet is compared with that in space, considering the cost, the quality of microgravity, experimental convenience, etc., and the future use of this microgravity for macromolecular crystal growth is discussed.
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Affiliation(s)
- N I Wakayama
- National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan.
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Takeuchi T, Kikuchi A, Banno N, Iijima Y, Kosuge M, Kiyoshi T, Tagawa K, Iwaki G, Hishinuma Y, Nishimura A, Koizumi N, Okuno K. RHQT JR Nb3Al conductors developed for nuclear fusion devices. Fusion Engineering and Design 2006. [DOI: 10.1016/j.fusengdes.2006.07.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kiyoshi T, Sota T. Differentiation of the dragonfly genus Davidius (Odonata: Gomphidae) in Japan inferred from mitochondrial and nuclear gene genealogies. Zoolog Sci 2006; 23:1-8. [PMID: 16547400 DOI: 10.2108/zsj.23.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To infer the differentiation of Japanese Davidius dragonflies, we investigated the genealogies of the mitochondrial cytochrome oxidase subunit I gene (COI) and the nuclear ribosomal RNA gene region encompassing 18S, ITS1, 5.8S, and ITS2 sequences for three species endemic to Japan--Davidius nanus, D. fujiama, and D. moiwanus--as well as D. lunatus from the Korean Peninsula. According to the mitochondrial and nuclear gene genealogies, D. nanus and D. moiwanus are closely related and are sister to the continental species D. lunatus, whereas D. fujiama differentiated from an ancestor of the other three species. Although the mitochondrial DNA data did not resolve the relationships between D. nanus and three D. moiwanus subspecies, the nuclear DNA data indicate the monophyly of D. moiwanus and its subspecies. The nuclear gene genealogy suggests that isolated wetlands used by larval D. moiwanus derive from the ancestral riverine habitats of D. nanus and other Davidius species. The COI sequence divergence among local populations was much greater in D. moiwanus than in D. nanus, which may be the result of differences in the dispersal ranges associated with the habitat types of these species.
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Affiliation(s)
- Takuya Kiyoshi
- Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
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Tanizaki Y, Kitani H, Okazaki M, Mifune T, Mitsunobu F, Soda R, Kiyoshi T, Takahashi K, Kimura I. [Changes in bronchoalveolar cell profiles of asthma patients induced by long-term glucocorticoid therapy]. Nihon Kyobu Shikkan Gakkai Zasshi 1993; 31:717-24. [PMID: 8345705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Effects of long-term glucocorticoid therapy on airway inflammatory cells were examined in 40 patients with bronchial asthma. 1. The dose of glucocorticoids required by asthmatic patients tended to increase and the level of serum cortisol tended to decrease with prolongation of the period of glucocorticoid therapy. 2. The proportion and number of lymphocytes in bronchoalveolar lavage (BAL) fluid decreased with prolongation of the period of glucocorticoid therapy. The proportion of BAL lymphocytes in asthmatic patients treated with glucocorticoids for more than 5 years was significantly lower than that in those treated for less than 4.9 years. 3. The proportion and number of BAL neutrophils increased with prolongation of the period of glucocorticoid therapy and the proportion of BAL neutrophils in patients treated with glucocorticoids for more than 10 years was significantly higher compared with those treated for less than 9.9 years. These findings indicate that long-term glucocorticoid therapy induces changes in airway inflammatory cell profiles, with a decrease in the number of lymphocytes and increase in the number of neutrophils.
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Affiliation(s)
- Y Tanizaki
- Department of Medicine, Okayama University Medical School, Tottori
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Takeuchi T, Kuroda T, Itoh K, Kosuge M, Iijima Y, Kiyoshi T, Matsumoto F, Inoue K. Development of Nb tube processed Nb3Al multifilamentary superconductor. J Fusion Energ 1992. [DOI: 10.1007/bf01060206] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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