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Taniguchi-Ikeda M, Morisada N, Inagaki H, Ouchi Y, Takami Y, Tachikawa M, Satake W, Kobayashi K, Tsuneishi S, Takada S, Yamaguchi H, Nagase H, Nozu K, Okamoto N, Nishio H, Toda T, Morioka I, Wada H, Kurahashi H, Iijima K. Two patients with PNKP mutations presenting with microcephaly, seizure, and oculomotor apraxia. Clin Genet 2017; 93:931-933. [PMID: 29243230 DOI: 10.1111/cge.13106] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 07/22/2017] [Accepted: 07/24/2017] [Indexed: 11/28/2022]
Affiliation(s)
- M Taniguchi-Ikeda
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan.,Division of Genetic Counseling, Kobe University Hospital, Kobe, Japan
| | - N Morisada
- Department of Clinical Genetics, Hyogo Prefectural Kobe Children's Hospital Perinatal Center, Kobe, Japan
| | - H Inagaki
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - Y Ouchi
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - Y Takami
- Department of Pediatrics, Himeji Red Cross Hospital, Himeji, Japan
| | - M Tachikawa
- Division of Neurology/Molecular Brain Science, Kobe University Graduate School of Medicine, Kobe, Japan
| | - W Satake
- Division of Neurology/Molecular Brain Science, Kobe University Graduate School of Medicine, Kobe, Japan
| | - K Kobayashi
- Division of Neurology/Molecular Brain Science, Kobe University Graduate School of Medicine, Kobe, Japan
| | - S Tsuneishi
- Medical and Welfare Center Kizuna, Kasai, Japan
| | - S Takada
- Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - H Yamaguchi
- Department of Neonatology, Hyogo Prefectural Kobe Children's Hospital Perinatal Center, Kobe, Japan
| | - H Nagase
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - K Nozu
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - N Okamoto
- Department of Medical Genetics, Osaka Women's and Children's Hospital, Osaka, Japan
| | - H Nishio
- Department of Community Medicine and Social Healthcare Science, Kobe University Graduate School of Medicine, Kobe, Japan
| | - T Toda
- Division of Genetic Counseling, Kobe University Hospital, Kobe, Japan.,Division of Neurology/Molecular Brain Science, Kobe University Graduate School of Medicine, Kobe, Japan
| | - I Morioka
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - H Wada
- Medical and Welfare Center Sakura, Sanda, Japan
| | - H Kurahashi
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - K Iijima
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
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Mashiko T, Hiraoka S, Nagashima U, Tachikawa M. Theoretical study on substituent and solvent effects for nanocubes formed with gear-shaped amphiphile molecules. Phys Chem Chem Phys 2017; 19:1627-1631. [DOI: 10.1039/c6cp07754d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have carried out molecular dynamic simulations to elucidate the stability of hexameric gear-shaped amphiphile nanocube capsules in water, 25% aqueous methanol, and methanol.
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3
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Tachikawa M, Kanagawa M, Kobayashi K, Toda T. P1.04 Some of disease-causing missense fukutin mutants mislocalize to endoplasmic reticulum. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Hayashi A, Shiga M, Tachikawa M. H / D isotope effect on the dihydrogen bond byab initiopath integral molecular dynamics simulation. Molecular Simulation 2007. [DOI: 10.1080/08927020601052963] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Toda T, Chiyonobu T, Xiong H, Tachikawa M, Kobayashi K, Manya H, Takeda S, Taniguchi M, Kurahashi H, Endo T. Fukutin and alpha-dystroglycanopathies. Acta Myol 2005; 24:60-3. [PMID: 16550916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Fukuyama-type congenital muscular dystrophy (FCMD), Walker-Warburg syndrome (WWS), and muscle-eye-brain (MEB) disease are clinically similar autosomal recessive disorders characterized by congenital muscular dystrophy, lissencephaly, and eye anomalies. We identified the gene for FCMD and MEB, which encodes the fukutin protein and the protein O-linked mannose beta1, 2-N-acetylglucosaminyltransferase (POMGnT1), respectively. Recent studies have revealed that posttranslational modification of alpha-dystroglycan is associated with these congenital muscular dystrophies with brain malformations. All are characterized by hypoglycosylated alpha-dystroglycan. Fukutin's function and the relation with other alpha-dystroglycanopathies are discussed.
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Affiliation(s)
- T Toda
- Division of Clinical Genetics, Department of Medical Genetics, Osaka University Graduate School of Medicine, Japan.
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7
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Shibl MF, Tachikawa M, Kühn O. The geometric (H/D) isotope effect in porphycene: grid-based Born–Oppenheimer vibrational wavefunctions vs. multi-component molecular orbital theory. Phys Chem Chem Phys 2005; 7:1368-73. [DOI: 10.1039/b500620a] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Udagawa T, Ishimoto T, Tokiwa H, Tachikawa M, Nagashima U. The geometrical isotope effect of C–H⋯O type hydrogen bonds revealed by multi-component molecular orbital calculation. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.03.091] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Ishimoto T, Tachikawa M, Yamauchi M, Kitagawa H, Tokiwa H, Nagashima U. Analysis of isotope effect of hydrogen-absorbing Pd ultra-fine particle by X-ray powder diffraction and first principle multi-component MO calculation. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00414-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Noguchi S, Tsukahara T, Fujita M, Kurokawa R, Tachikawa M, Toda T, Tsujimoto A, Arahata K, Nishino I. cDNA microarray analysis of individual Duchenne muscular dystrophy patients. Hum Mol Genet 2003. [DOI: 10.1093/hmg/ddg065] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Tachikawa M, Muetterties EL. Metal clusters. 25. A uniquely bonded C-H group and reactivity of a low-coordinate carbidic carbon atom. J Am Chem Soc 2002. [DOI: 10.1021/ja00533a051] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Shapley JR, Pearson GA, Tachikawa M, Schmidt GE, Churchill MR, Hollander FJ. Mixed-metal clusters via metal hydride coupling. New rhenium-osmium clusters and the crystal structure of eicosacarbonyl(dihydrotriosmium)dirhenium. J Am Chem Soc 2002. [DOI: 10.1021/ja00466a056] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tachikawa M, Stein J, Muetterties EL, Teller RG, Beno MA, Gebert E, Williams JM. Metal clusters with exposed and low-coordinate nitride nitrogen atoms. J Am Chem Soc 2002. [DOI: 10.1021/ja00541a084] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Tachikawa M, Sievert AC, Muetterties EL, Thompson MR, Day CS, Day VW. Metal clusters. 24. Synthesis and structure of heteronuclear metal carbide clusters. J Am Chem Soc 2002. [DOI: 10.1021/ja00525a047] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Beno MA, Williams JM, Tachikawa M, Muetterties EL. Fischer-Tropsch chemistry: structure of a seminal .eta.2-CH cluster derivative, HFe4(.eta.2-CH)(CO)12. J Am Chem Soc 2002. [DOI: 10.1021/ja00533a052] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Clauss AD, Tachikawa M, Shapley JR, Pierpont CG. Crystal structure and solution dynamics of (.mu.-H)Os3(CO)10(.mu.-.eta.2-CPh:CHPh). Inorg Chem 2002. [DOI: 10.1021/ic50219a039] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Beno MA, Williams JM, Tachikawa M, Muetterties EL. A closed three-center carbon-hydrogen-metal interaction. A neutron diffraction study of HFe4(.eta.2-CH)(CO)12. J Am Chem Soc 2002. [DOI: 10.1021/ja00396a032] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Toda T, Kano H, Sasaki J, Tachikawa M, Kobayashi K. [Identification of a gene for Fukuyama congenital muscular dystrophy and its pathomechanism]. Tanpakushitsu Kakusan Koso 2001; 46:2299-305. [PMID: 11802383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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19
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Tachikawa M, Shiga M. Evaluation of atomic integrals for hybrid Gaussian type and plane-wave basis functions via the McMurchie-Davidson recursion formula. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 64:056706. [PMID: 11736140 DOI: 10.1103/physreve.64.056706] [Citation(s) in RCA: 8] [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: 05/21/2001] [Indexed: 05/23/2023]
Abstract
A convenient formalism is developed for the evaluation of atomic integrals composed of a hybrid Gaussian type function and plane-wave (GTF-PW) basis set, based upon the recursion scheme proposed by McMurchie and Davidson [L. E. McMurchie and E. R. Davidson, J. Comput. Phys. 26, 218 (1978)] which was originally for Gaussian type basis functions. We show that revisions of recursion relations in the original article are necessary in order to allow systematic production of overlap, kinetic energy, nuclear attraction, and electron repulsion integrals in compact forms. Involving easy calculation of complex incomplete gamma functions, the recursion relations enable the use of hybrid GTF-PW basis functions with arbitrarily large angular momentum. This basis function can be applied to the first-principle calculation for solids involving localized electron orbitals.
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Affiliation(s)
- M Tachikawa
- The Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Colombo R, Bignamini AA, Carobene A, Sasaki J, Tachikawa M, Kobayashi K, Toda T. Age and origin of the FCMD 3'-untranslated-region retrotransposal insertion mutation causing Fukuyama-type congenital muscular dystrophy in the Japanese population. Hum Genet 2000; 107:559-67. [PMID: 11153909 DOI: 10.1007/s004390000421] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 10/27/2022]
Abstract
Fukuyama-type congenital muscular dystrophy (FCMD), an autosomal recessive disorder with a high prevalence in the Japanese population, is characterised by severe muscular dystrophy associated with brain malformation (cortical dysgenesis) and mental retardation. In Japan, 87% of FCMD-bearing chromosomes carry a 3-kb retrotransposal insertion of tandemly repeated sequences within the disease gene recently identified on chromosome 9q31, and most of them share a common founder haplotype. FCMD is the first human disease known to be caused primarily by an ancient retrotransposal integration. By applying two methods for the study of linkage disequilibrium between flanking polymorphic markers and the disease locus, and of its decay over time, the age of the insertion mutation causing FCMD in Japanese patients is calculated to be approximately 102 generations (95% confidence interval: 86-117 g), or slightly less. The estimated age dates the most recent common ancestor of the mutation-bearing chromosomes back to the time (or a few centuries before) the Yayoi people started migrating to Japan from the Korean peninsula. This finding makes the molecular population genetics of FCMD understandable in the context of Japan's history and the founder effect consistent with the prevalent theory on the origins of the modern Japanese population.
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Affiliation(s)
- R Colombo
- Department of Psychology, Catholic University of the Sacred Heart, Milan, Italy.
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Fukuda K, Furukawa N, Hayashi S, Tachikawa M. Frequency stabilization of a diode laser with a thin Cs-vapor cell. IEEE Trans Ultrason Ferroelectr Freq Control 2000; 47:502-505. [PMID: 18238573 DOI: 10.1109/58.827443] [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: 05/25/2023]
Abstract
We propose a novel method of stabilizing laser oscillation frequency that uses a sub-Doppler spectrum of atoms in a thin vapor cell. An extended-cavity diode laser is frequency-locked to a hyperfine component of the Cs-D(2) line. In the Allan-variance measurements on the beat note between two lasers thus stabilized, a frequency stability of 6.6x10(-11) is achieved at an averaging time of 5.8 s. The frequency can be controlled even when the laser beam intensity is as small as 70 nW/cm(2).
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Affiliation(s)
- K Fukuda
- Commun. Res. Lab., Minist. of Posts and Telecommun., Tokyo
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Odashima H, Tachikawa M, Zink LR, Evenson KM. Sub-Doppler Frequency Measurements of 15NH3 Laser Transitions. J Mol Spectrosc 1998; 188:245-247. [PMID: 9535691 DOI: 10.1006/jmsp.1997.7353] [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: 05/22/2023]
Abstract
Copyright
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Affiliation(s)
- H Odashima
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado, 80303
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Yamanaka K, Hayashi H, Tachikawa M, Kato K, Hasegawa A, Oku N, Okada S. Metabolic methylation is a possible genotoxicity-enhancing process of inorganic arsenics. Mutat Res 1997; 394:95-101. [PMID: 9434848 DOI: 10.1016/s1383-5718(97)00130-7] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [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: 02/05/2023]
Abstract
To elucidate if the metabolic methylation participates in the induction of inorganic arsenic-responsible genetic damage, arsenite (ARS) and its methylated metabolites, methanearsonic acid (MMAA) and dimethylarsinic acid (DMAA), were comparatively assayed for the induction of DNA damage by determining DNA repair synthesis using polymerization inhibitors such as aphidicolin (aph) and hydroxyurea (HU). When human alveolar epithelial type II (L-132) cells in culture were exposed to either one of these three arsenic compounds, DNA single-strand breaks resulting from the inhibition of repair polymerization were remarkably produced by exposure to DMAA at 5 to 100 microM, while not by that to ARS and MMAA even at 100 microM. Furthermore, a bromodeoxyuridine (BrdrU)-photolysis assay indicated that the induction of DNA repair synthesis was observed only in the case of exposure to DMAA. When L-132 cells were exposed to 100 microM MMAA in the presence of 10 mM S-adenosyl-L-methionine (SAM), which is a well-known methyl-group donor in metabolic methylation of arsenics, DNA repair synthesis was induced along with an increase in the amount of dimethylarsenic in the cells. These results indicate that metabolic methylation of inorganic arsenics to dimethylarsenics is predominantly involved in the induction of DNA damage.
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Affiliation(s)
- K Yamanaka
- Department of Biochemical Toxicology, Nihon University College of Pharmacy, Chiba, Japan
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Tachikawa M, Nakagawa H, Terasaki AG, Mori H, Ohashi K. A 260-kDa filamin/ABP-related protein in chicken gizzard smooth muscle cells is a new component of the dense plaques and dense bodies of smooth muscle. J Biochem 1997; 122:314-21. [PMID: 9378708 DOI: 10.1093/oxfordjournals.jbchem.a021755] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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: 02/05/2023] Open
Abstract
A 260-kDa protein, termed cgABP260, which localized in the dense plaques and dense bodies of smooth muscle cells, was found in a low-salt alkaline extract of chicken gizzard smooth muscle. An antibody against cgABP260 was used to screen a chicken gizzard cDNA library, and the nucleotide sequence of the partial cDNA encoding this protein was determined. Comparison of predicted amino acid sequences revealed that the protein had significant homology with human ABP-280 and chicken retina filamin [Barry, C.P. et al. (1993) J. Biol. Chem. 268, 25577-25586], but despite the high homology, cgABP260 was immunologically distinguishable from filamin. Immunoblot analysis showed that an anti-cgABP260 antibody reacted exclusively with the cgABP260 band of smooth, skeletal, and cardiac muscle tissues. By indirect immunofluorescence, the membrane-affinity-purified antibody against cgABP260 intensely stained the dense plaques of the isolated smooth muscle cells. Immunoelectron microscopy showed that immunogold particles representing cgABP260 were found abundantly on the dense plaques and less abundantly on the dense bodies. Its amino acid sequence, molecular size, immunological reactivity, and localization in smooth muscle thus indicated that cgABP260 is a new component of the dense plaques and dense bodies of smooth muscle cells.
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Affiliation(s)
- M Tachikawa
- Department of Biology, Faculty of Science, Chiba University
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Abstract
We generated tunable far-infrared radiation by mixing CO(2) -laser,(15)NH(3) -laser, and microwave radiations in a W-Co metal-insulator-metal diode. We used this far-infrared radiation to measure accurately the torsion-rotation transitions of CH(3)OH in the 6-8-THz region.
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Tsukamoto T, Tachikawa M, Hirano T, Kuga T, Shimizu T. Synchronization of a chaotic laser pulsation with its prerecorded history. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1996; 54:4476-4479. [PMID: 9965609 DOI: 10.1103/physreve.54.4476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
Two DNA binding proteins, Cro and the amino-terminal domain of the repressor of bacteriophage 434 (434 Cro and 434 repressor) that regulate gene expression and contain a helix-turn-helix (HTH) motif responsible for their site-specific DNA recognition adopt very similar three-dimensional structures when compared to each other. To reveal structural differences between these two similar proteins, their dynamic structures, as examined by normal mode analysis, are compared in this paper. Two kinds of structural data, one for the monomer and the other for a complex with DNA, for each protein, are used in the analyses. From a comparison between the monomers it is found that the interactions of Ala-24 in 434 Cro or Val-24 in 434 repressor, both located in the HTH motif, with residues 44, 47, 48, and 51 located in the domain facing the motif, and the interactions between residues 17, 18, 28, and 32, located in the HTH motif, cause significant differences in the correlative motions of these residues. From the comparison between the monomer and the complex with DNA for each protein, it was found that the first helix in the HTH motif is distorted in the complex form. While the residues in the HTH motif in 434 Cro have relatively larger positive correlation coefficients of motions with other residues within the HTH motif, such correlations are not large in the HTH motif of 434 repressor. It is suggestive to their specificity because the 434 repressor is less specific than 434 Cro. Although a structural comparison of proteins has been performed mainly from a static or geometrical point of view, this study demonstrates that the comparison from a dynamic point of view, using the normal mode analysis, is useful and convenient to explore a difference that is difficult to find only from a geometrical point of view, especially for proteins very similar in structure.
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Affiliation(s)
- H Wako
- School of Social Sciences, Waseda University, Tokyo, Japan
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Abstract
We present a novel technique for resonantly pumping a continuous-wave far-infrared NH(3) laser with a linetunable mid-infrared NH(3) laser that is optically pumped by a CO(2) laser. In this two-step process we first convert 10-microm CO(2) laser photons into 11-13-microm NH(3) laser photons, which are then converted into 60-400-microm photons in a far-infrared NH(3) laser. Continuous-wave laser action on 10 far-infrared lines of (15)NH(3), including four new ones, has been obtained with a single CO(2) laser pump line.
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Tsukamoto T, Tachikawa M, Sugawara T, Shimizu T. Locking of a passive Q-switched chaotic laser system to a small external modulation. Phys Rev A 1995; 52:1561-1569. [PMID: 9912395 DOI: 10.1103/physreva.52.1561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Tezuka M, Sadanobu S, Gomi K, Tachikawa M, Sawamura R. In vitro effect of chromium and other trace metals on mouse hepatotoxicity induced by carbon tetrachloride exposure. Biol Pharm Bull 1995; 18:256-61. [PMID: 7742794 DOI: 10.1248/bpb.18.256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Using primary cultured mouse hepatocytes, in vitro study was performed to discuss the effect of Cr(III) and several other trace metals, Cr(VI), Mn(II), Zn(II), Co(II), Cu(II), Ni(II), and Ga(III) on acute liver damage induced by CCl4 exposure. 1) The LDH activity 60 min after CCl4 exposure increased dose-dependently with CCl4 concentrations in all of the trace metal pretreatment groups, except for the Cr(VI) pretreatment group, which showed a significant protective effect even after 30 min of CCl4 exposure. 2) LDH leakage was not observed 10 min after CCl4 exposure at 3 or 5 mM, while lipid peroxidation was increased dose-dependently with CCl4 concentrations in all groups except the Cr(VI) pretreatment group, in which the production of peroxidated lipid was significantly inhibited. 3) Similarly to the pretreatment with Cr(VI), LDH leakage 30 min after exposure to 5 mM CCl4 was inhibited by pretreatment with such antioxidants as N,N'-diphenyl-p-phenylenediamine or DL-alpha-tocopherol. 4) The Cr(VI) uptake was about 50% of the added amount, whereas the Cr(III) uptake was only 5% of the added amount. 5) 90% or more of the intracellular chromium was reduced to Cr(III) 10 min after Cr(VI) treatment. The results suggested that the in vitro protective effect of pretreatment with Cr(VI) was due to a rapid reduction of Cr(VI) to Cr(III), and the radical scavenger-like effect of the produced Cr(III) was the same effect as in vivo Cr(III); it therefore suggests that Cr(III) contributes to protective effect on CCl4-induced hepatotoxicity.
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Affiliation(s)
- M Tezuka
- Department of Hygienic Chemistry, College of Pharmacy, Nihon University, Chiba, Japan
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Tohei T, Tachikawa M, Shimizu T. Rate-equation analysis of deterministic chaos in a laser with a saturable absorber. Phys Rev A 1992; 45:5166-5170. [PMID: 9907604 DOI: 10.1103/physreva.45.5166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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33
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Tanii K, Tachikawa M, Tohei T, Hong FL, Shimizu T. Instability and chaos in two-mode oscillation of a CO2 laser modulated by a saturable absorber. Phys Rev A 1991; 43:1498-1501. [PMID: 9905177 DOI: 10.1103/physreva.43.1498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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34
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Tachikawa M, Hong FL, Tanii K, Shimizu T. Deterministic chaos in passive Q-switching pulsation of a CO2 laser with saturable absorber. Phys Rev Lett 1988; 60:2266-2268. [PMID: 10038306 DOI: 10.1103/physrevlett.60.2266] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kawai S, Nishida Y, Nakada M, Tachikawa M, Miyagoshi E. [Standards of nursing of patients with ovarian and uterine cancer--through the nursing actions toward patients with cervical and ovarian cancer scheduled for total hysterectomy]. Kango Gijutsu 1985; 31:1017-24. [PMID: 2410645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Suzuki S, Kawata H, Tachikawa M, Takagi M. Real time X-ray topographic study of ferroelectric BaTiO 3crystal. Acta Crystallogr A 1981. [DOI: 10.1107/s0108767381092155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Davis JH, Beno MA, Williams JM, Zimmie J, Tachikawa M, Muetterties EL. Structure and chemistry of a metal cluster with a four-coordinate carbide carbon atom. Proc Natl Acad Sci U S A 1981; 78:668-71. [PMID: 16592968 PMCID: PMC319860 DOI: 10.1073/pnas.78.2.668] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Molecular metal clusters with carbide carbon atoms of low coordination number have been prepared; they are the anionic [HFe(4)C(CO)(12) (-)] and [Fe(4)C(CO)(12) (2-)] clusters. An x-ray crystallographic analysis of a tetraaminozinc salt of the latter has established a butterfly array of iron atoms with the carbide carbon atom centered above the wings of the Fe(4) core. Each iron atom was bonded to three peripheral carbonyl ligands. The distances from the carbide carbon to iron were relatively short, particularly those to the apical iron atoms (1.80 A average). Protonation of the anionic carbide clusters reversibly yielded HFe(4)(CH)(CO)(12), and methylation of the dianion gave {Fe(4)[CC(O)CH(3)](CO)(12) (-)}. Oxidation of [Fe(4)C(CO)(12) (2-)] yielded the coordinately unsaturated Fe(4)C(CO)(12) cluster, which was extremely reactive. Hydrogen addition to this iron cluster was rapid below 0 degrees C, and a C-H bond was formed in this transformation.
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Affiliation(s)
- J H Davis
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
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Shapley J, Richter S, Tachikawa M, Keister J. Fluxional behavior of the bridging vinyl group in HOs3(CO)10(CHCH2) and related complexes. J Organomet Chem 1975. [DOI: 10.1016/s0022-328x(00)86960-0] [Citation(s) in RCA: 84] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Negishi T, Naito M, Ito S, Tachikawa M, Akiyama F. [Information systems in clinical medicine]. Nihon Ishikai Zasshi 1970; 63:603-10. [PMID: 4910657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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