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Miyoshi A, Okazaki M, Kato K, Kanazawa T, Yokoi T, Nishioka S, Nozawa S, Yamakata A, Maeda K. Photocatalytic Hydrogen Evolution Activity of Nitrogen/Fluorine-Codoped Rutile TiO 2. ACS Omega 2023; 8:41809-41815. [PMID: 37970046 PMCID: PMC10634042 DOI: 10.1021/acsomega.3c06492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/06/2023] [Indexed: 11/17/2023]
Abstract
The development of a photocatalyst capable of evolving H2 from water under visible light is important. Here, the photocatalytic activity of N/F-codoped rutile TiO2 (TiO2:N,F) for H2 evolution was examined with respect to metal cocatalyst loading and irradiation conditions. Among the metal species examined, Pd was the best-performing cocatalyst for TiO2:N,F under UV-vis irradiation (λ > 350 nm), producing H2 from an aqueous methanol solution. The H2 evolution activity was also dependent on the state of the loaded Pd species on the TiO2:N,F, which varied depending on the preparation conditions. Pd/TiO2:N,F prepared by an impregnation-H2 reduction method, showed the highest performance. However, the activity of the optimized Pd/TiO2:N,F toward H2 evolution from an aqueous methanol solution was negligibly small under visible-light irradiation (λ > 400 nm), although the use of an ethylenediaminetetraacetic acid disodium salt as an electron donor resulted in observable H2 evolution. Transient absorption spectroscopy revealed that although a relatively large population of reactive electrons was generated in the TiO2:N,F under 355 nm UV-pulse photoexcitation, the density of reactive electrons generated under 480 nm visible light was lower. This wavelength-dependent behavior in photogenerated charge carrier dynamics could explain the different photocatalytic activities of the TiO2:N,F catalysts under different irradiation conditions.
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Affiliation(s)
- Akinobu Miyoshi
- Department
of Chemistry, School of Science, Tokyo Institute
of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Megumi Okazaki
- Department
of Chemistry, School of Science, Tokyo Institute
of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kosaku Kato
- Graduate
School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Tomoki Kanazawa
- Institute
of Materials Structure Science, High Energy
Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Toshiyuki Yokoi
- Nanospace
Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - Shunta Nishioka
- Department
of Chemistry, School of Science, Tokyo Institute
of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Shunsuke Nozawa
- Institute
of Materials Structure Science, High Energy
Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Akira Yamakata
- Graduate
School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Kazuhiko Maeda
- Department
of Chemistry, School of Science, Tokyo Institute
of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- Living
Systems Materialogy (LiSM) Research Group, International Research
Frontiers Initiative (IRFI), Tokyo Institute
of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
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Miyoshi A, Yasuda S, Kanazawa T, Haruki R, Yanagisawa K, Tang Y, Mizuochi R, Yokoi T, Nozawa S, Kimoto K, Maeda K. Fluorine-Assisted Low-Temperature Synthesis of GaN:ZnO-Related Solid Solutions with Visible-Light Photoresponse. ACS Appl Mater Interfaces 2022; 14:19756-19765. [PMID: 35451831 DOI: 10.1021/acsami.2c03435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Wurtzite-structured Ga1-xZnx(N,O,F) was successfully synthesized by nitridation of mixtures of a Ga-containing oxide and ZnF2. The addition of ZnF2 lowered the nitridation temperature for the synthesis of Ga1-xZnx(N,O,F) to 823 K, even when bulk ZnGa2O4 was used as a paired precursor. This lowering of the synthesis temperature was ascribed to the enhancement of nitridation through the addition of fluorine. The low-temperature nitridation achieved by the addition of fluorine suppressed the volatilization of Zn compared with that during the synthesis of a GaN:ZnO solid solution by a conventional high-temperature ammonolysis reaction. The higher concentration of Zn, as well as the higher N concentration in Ga1-xZnx(N,O,F) achieved through the fluorine-assisted nitridation, led to a redshift of the absorption edge of Ga1-xZnx(N,O,F) to 560 nm compared with that of GaN:ZnO synthesized by the conventional ammonolysis reaction. The visible-light absorption of Ga1-xZnx(N,O,F) can be used to drive the photoelectrochemical oxidation of water.
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Affiliation(s)
- Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Shuhei Yasuda
- Nanospace Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Tomoki Kanazawa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
| | - Rie Haruki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
| | - Keiichi Yanagisawa
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Ya Tang
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Ryusuke Mizuochi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshiyuki Yokoi
- Nanospace Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Shunsuke Nozawa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
| | - Koji Kimoto
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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Khaorapapong N, Suppaso C, Maeda K, Nishioka S, Kanazawa T, Miyoshi A, Amnuaypanich S, Jetsrisuparb K, Suthirakun S, Khamdang C, Wannasen L. Visible-light driven H2 evolution over a precious metal-free hybrid photocatalyst constructed from CuO and NiFe layered double hydroxide. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00958g] [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: 11/12/2022]
Abstract
The composites of cupric oxide (CuO) and NiFe layered double hydroxide (NiFe-LDH) were prepared by three methods including hydrothermal (h) and solid-state reactions (s), as well as physical mixing (m)....
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Miyoshi A, Shimoyama Y, Mogi H, Ubukata H, Hirayama N, Tanaka A, Arai K, Morita S, Yui T, Uchida S, Motohashi T, Inaguma Y, Kageyama H, Maeda K. Photocatalytic Water Oxidation by Phosphotungstate and Mg-Al Layered Double Hydroxide Hybrid. CHEM LETT 2021. [DOI: 10.1246/cl.210621] [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: 11/12/2022]
Affiliation(s)
- Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550
- Japan Society for the Promotion of Science, Kojimachi Business Center Building, Tokyo 102-0083
| | - Yuto Shimoyama
- Japan Society for the Promotion of Science, Kojimachi Business Center Building, Tokyo 102-0083
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902
| | - Hiroto Mogi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550
| | - Hiroki Ubukata
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510
| | - Naoki Hirayama
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550
| | - Ayu Tanaka
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181
| | - Kenji Arai
- Graduate School of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686
| | - Soichiro Morita
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588
| | - Tatsuto Yui
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181
| | - Sayaka Uchida
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902
| | - Teruki Motohashi
- Graduate School of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686
| | - Yoshiyuki Inaguma
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588
| | - Hiroshi Kageyama
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550
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Miyoshi A, Kuwabara A, Maeda K. Effects of Nitrogen/Fluorine Codoping on Photocatalytic Rutile TiO 2 Crystal Studied by First-Principles Calculations. Inorg Chem 2021; 60:2381-2389. [PMID: 33497215 DOI: 10.1021/acs.inorgchem.0c03262] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nitrogen/fluorine codoping of rutile TiO2 was recently reported to be effective for introducing visible-light absorption, and the resultant TiO2:N,F worked efficiently as an O2 evolution photocatalyst in a Z-scheme water-splitting system. Although an increase in the amount of nitrogen doped into rutile TiO2 lattice in the presence of fluorine was experimentally demonstrated, the role of fluorine in the system remained unclear. Here, we report a computational study on TiO2:N,F through the construction of supercell models with substitutional defects to reveal the atomic arrangement of the material and the electronic band structure. Calculations for all possible structures of nitrogen/fluorine and nitrogen/oxygen-vacancy relative positions revealed that the defect complexes were preferentially located on the (110) plane and that the distance between defects did not have a strong correlation with the formation energy. The present work also showed that although fluorine did not directly contribute to the narrowing of the band gap of TiO2:N,F, the fluorine activity of the synthetic atmosphere promotes the formation of substitutional defect complexes of nitrogen/fluorine for anion sites. This eventually increases the amount of nitrogen incorporated into the rutile TiO2 lattice and also results in reduction of the amount of oxygen vacancy, which is in qualitative agreement with our previous result of transient absorption measurement for rutile TiO2:N,F. The role of fluorine in TiO2:N,F is thus clarified through our systematic first-principles calculations.
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Affiliation(s)
- Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.,Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Akihide Kuwabara
- Nanostructures Research Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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de Lacerda LB, Rios WM, Masson AP, Brandão IT, Milani TM, Borges MC, Ramalho LNZ, Barbosa MCR, Miyoshi A, Silva CL. Oral administration of Hsp65-producing Lactococcus lactis attenuates allergic asthma in a murine model. J Appl Microbiol 2020; 130:2075-2086. [PMID: 33124086 DOI: 10.1111/jam.14913] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/09/2020] [Accepted: 10/23/2020] [Indexed: 01/09/2023]
Abstract
AIMS Allergic asthma is a chronic inflammatory lung disease characterized by a Th2-type immune response pattern. The development of nonspecific immunotherapy is one of the primary goals for the control of this disease. METHODS AND RESULTS In this study, we evaluated the therapeutic effects of Lactococcus lactis-producing mycobacterial heat shock protein 65 (LLHsp65) in an ovalbumin (OVA)-induced allergic asthma model. OVA-challenged BALB/c mice were orally administrated with LLHsp65 for 10 consecutive days. The results demonstrate that LLhsp65 attenuates critical features of allergic inflammation, like airway hyperresponsiveness and mucus production. Likewise, the treatment decreases the pulmonary eosinophilia and the serum level of OVA-specific IgE. In addition to deviating immune responses towards Th1-cytokine profile, increase regulatory T cells, and cytokine levels, such as IL-6 and IL-10. CONCLUSIONS Our results reveal that the mucosal immunotherapy of LLHsp65 significantly reduces the overall burden of airway allergic inflammation, suggesting a promising therapeutic strategy for allergic asthma treatment. SIGNIFICANCE AND IMPACT OF THE STUDY This research reveals new perspectives on nonspecific immunotherapy based on the delivery of recombinant proteins by lactic acid bacteria to treat of allergic disorders.
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Affiliation(s)
- L B de Lacerda
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - W M Rios
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - A P Masson
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - I T Brandão
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - T M Milani
- Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - M C Borges
- Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - L N Z Ramalho
- Department of Pathology Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - M C R Barbosa
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - A Miyoshi
- Department of Ecology, Genetics and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - C L Silva
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Tang Y, Kato K, Oshima T, Mogi H, Miyoshi A, Fujii K, Yanagisawa KI, Kimoto K, Yamakata A, Yashima M, Maeda K. Synthesis of Three-Layer Perovskite Oxynitride K 2Ca 2Ta 3O 9N·2H 2O and Photocatalytic Activity for H 2 Evolution under Visible Light. Inorg Chem 2020; 59:11122-11128. [PMID: 32683860 DOI: 10.1021/acs.inorgchem.0c01607] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Substitution of oxide anions (O2-) in a metal oxide for nitrogen (N3-) results in reduction of the band gap, which is attractive in heterogeneous photocatalysis; however, only a handful of two-dimensional layered perovskite oxynitrides have been reported, and thus, the structural effects of layered oxynitrides on photocatalytic activity have not been sufficiently examined. This study reports the synthesis of a Ruddlesden-Popper phase three-layer oxynitride perovskite of K2Ca2Ta3O9N·2H2O, and the photocatalytic activity is compared with an analogous two-layer perovskite, K2LaTa2O6N·1.6H2O. Topochemical ammonolysis reaction of a Dion-Jacobson phase oxide KCa2Ta3O10 at 1173 K in the presence of K2CO3 resulted in a single-phase layered perovskite, K2Ca2Ta3O9N·2H2O, which belongs to the tetragonal P4/mmm space group, as demonstrated by synchrotron X-ray diffraction, scanning transmission electron microscopy measurements, and elemental analysis. The synthesized K2Ca2Ta3O9N·2H2O has an absorption edge at around 460 nm, with an estimated band gap of ca. 2.7 eV. K2Ca2Ta3O9N·2H2O modified with a Pt cocatalyst generated H2 from an aqueous solution containing a dissolved NaI as a reversible electron donor under visible light (λ > 400 nm) with no noticeable change in the crystal structure and light absorption properties. However, the H2 evolution activity of K2Ca2Ta3O9N·2H2O was an order of magnitude lower than that of K2LaTa2O6N·1.6H2O. Femtosecond transient absorption spectroscopy revealed that the lifetime of photogenerated mobile electrons in K2Ca2Ta3O9N·2H2O was shorter than that in K2LaTa2O6N·1.6H2O, which could explain the low photocatalytic activity of K2Ca2Ta3O9N·2H2O.
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Affiliation(s)
- Ya Tang
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kosaku Kato
- Graduate School of Engineering, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
| | - Takayoshi Oshima
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hiroto Mogi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.,Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Kotaro Fujii
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kei-Ichi Yanagisawa
- Electronic Functional Materials Group, Polymer Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Koji Kimoto
- Electronic Functional Materials Group, Polymer Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Akira Yamakata
- Graduate School of Engineering, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
| | - Masatomo Yashima
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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da Cunha VP, Preisser TM, Santana MP, Machado DCC, Pereira VB, Miyoshi A. Invasive Lactococcus lactis producing mycobacterial Hsp65 ameliorates intestinal inflammation in acute TNBS-induced colitis in mice by increasing the levels of the cytokine IL-10 and secretory IgA. J Appl Microbiol 2020; 129:1389-1401. [PMID: 32473073 DOI: 10.1111/jam.14695] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/22/2020] [Accepted: 04/30/2020] [Indexed: 12/22/2022]
Abstract
AIMS To investigate the anti-inflammatory activity of an invasive and Hp65-producing strain Lactococcus lactis NCDO2118 FnBPA+ (pXYCYT:Hsp65) in acute 2,4,6-trinitrobenzene sulphonic acid (TNBS)-induced colitis in mice as an innovative therapeutic strategy against Crohn's disease (CD). METHODS AND RESULTS The pXYCYT:Hsp65 plasmid was transformed into the L. lactis NCDO2118 FnBPA+ strain, resulting in the L. lactis NCDO2118 FnBPA+ (pXYCYT:Hsp65) strain. Then, the functionality of the strain was evaluated in vitro for Hsp65 production by Western blotting and for invasion into Caco-2 cells. The results demonstrated that the strain was able to produce Hsp65 and efficiently invade eukaryotic cells. Subsequently, in vivo, the anti-inflammatory capacity of the recombinant strain was evaluated in colitis induced with TNBS in BALB/c mice. Oral administration of the recombinant strain was able to attenuated the severity of colitis by mainly reducing IL-12 and IL-17 levels and increasing IL-10 and secretory immunoglobulin A levels. CONCLUSIONS The L. lactis NCDO2118 FnBPA+ (pXYCYT:Hsp65) strain contributed to a reduction in inflammatory damage in experimental CD. SIGNIFICANCE AND IMPACT OF THE STUDY This study, which used L. lactis for the production and delivery of Hsp65, has scientific relevance because it shows the efficacy of this new strategy based on therapeutic protein delivery into mammalian enterocytes.
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Affiliation(s)
- V P da Cunha
- Laboratory of Genetic Technology, Department of Ecology, Genetics and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - T M Preisser
- Laboratory of Genetic Technology, Department of Ecology, Genetics and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - M P Santana
- Laboratory of Genetic Technology, Department of Ecology, Genetics and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - D C C Machado
- Center for Gastrointestinal Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - V B Pereira
- Laboratory of Genetic Technology, Department of Ecology, Genetics and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - A Miyoshi
- Laboratory of Genetic Technology, Department of Ecology, Genetics and Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Katagiri K, Hayashi Y, Yoshiyuki R, Inumaru K, Uchiyama T, Nagata N, Uchimoto Y, Miyoshi A, Maeda K. Mechanistic Insight on the Formation of GaN:ZnO Solid Solution from Zn-Ga Layered Double Hydroxide Using Urea as the Nitriding Agent. Inorg Chem 2018; 57:13953-13962. [DOI: 10.1021/acs.inorgchem.8b02498] [Citation(s) in RCA: 15] [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: 11/29/2022]
Affiliation(s)
- Kiyofumi Katagiri
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Yuki Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Risa Yoshiyuki
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Kei Inumaru
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Tomoki Uchiyama
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Noriyuki Nagata
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Yoshiharu Uchimoto
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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Arahata H, Miyoshi A, Watanabe A, Kawano Y, Yamamoto A, Sasagasako N. DUCHENNE MUSCULAR DYSTROPHY – CLINICAL. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
Water splitting using a semiconductor photocatalyst with sunlight has long been viewed as a potential means of large-scale H2 production from renewable resources. Different from anatase TiO2 , rutile enables preferential water oxidation, which is useful for the construction of a Z-scheme water-splitting system. The combination of rutile TiO2 with a suitable H2 -evolution photocatalyst such as a Pt-loaded BaZrO3 -BaTaO2 N solid solution enables solar-driven water splitting into H2 and O2 . While rutile TiO2 is a wide-gap semiconductor with a bandgap of 3.0 eV, co-doping of rutile TiO2 with certain metal ions and/or nitrogen produces visible-light-driven photocatalysts, which are also useful as a component for water oxidation in visible-light-driven Z-scheme water splitting. The key to achieving highly efficient water oxidation is to maintain a charge balance of dopants in the rutile, because single doping typically produces trap states that capture photogenerated electrons and/or holes. Here we provide a concise summary of rutile TiO2 -based photocatalysts for water-splitting systems.
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Affiliation(s)
- Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Shunta Nishioka
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
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Miyoshi A, Sugawara M, Kaneda Y, Sekizawa H, Dochi O. 193 Comparison of Superovulatory Responses to Single Subcutaneous FSH Injection and Twice-Daily Intramuscular FSH Injection Protocols in Japanese Black Cows. Reprod Fertil Dev 2018. [DOI: 10.1071/rdv30n1ab193] [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: 11/23/2022] Open
Abstract
The conventional superovulation treatment using follicle-stimulating hormone (FSH) comprises 2 intramuscular injections per day for 3 to 4 days. This conventional method requires frequent handling of donors—which may cause increasing stress in donors—and high labour costs. Therefore, to alleviate these issues, a treatment protocol using a single FSH injection under on-farm conditions is needed. The objective of this study was to evaluate the feasibility of the single subcutaneous FSH injection protocol (Sugawara et al. 2017 Reprod. Fertil. Dev. 29, 209), compared with with the traditional twice-daily intramuscular FSH injection protocol, in Japanese Black cows. Japanese Black cows (n = 13) were superovulated using 2 treatments in a crossover design. All cows received an intravaginal progesterone device (CIDR) at random stages of the oestrous cycle (Day 0), and 2 mg of oestradiol benzoate on Day 1 (24 h after CIDR insertion). On Day 6, for the group receiving a single subcutaneous FSH injection (single-FSH), 20 armor units (AU) of pFSH dissolved in 30 mL of saline was subcutaneously injected in the neck region and 0.5 mg of prostaglandin F2α was intramuscularly injected simultaneously. For the control group, FSH administration was initiated at Day 6. A total dose of 20 AU of FSH was administered in 3 days (with decreasing doses of 5, 3, and 2 AU, respectively, per injection) with 2 intramuscular injections per day; 0.5 mg of prostaglandin F2α was injected 48 h after the first FSH injection. For both groups, CIDR was removed 60 h after FSH injection and AI was done 42 to 48 h after CIDR removal. Embryo collections were performed 7 days after AI. Data were analysed using t-test for the mean numbers of collected ova/embryos and transferable embryos, and chi-squared test for the proportion of transferable embryos. There were no significant differences in the mean numbers (single-FSH v. control) of ova/embryos collected (17.1 ± 12.1 v. 17.8 ± 9.3), or transferable embryos (8.4 ± 9.3 v. 10.3 ± 8.7), and proportion of transferable embryos (45.0 ± 34.0 v. 56.6 ± 36.5). These results showed that although a slightly higher number and proportion of transferable embryos were obtained in the control group, a superovulation treatment protocol involving a single subcutaneous FSH injection can be effectively used for Japanese Black cows, under on-farm conditions.
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Arahata H, Nishiyama T, Inada K, Miyoshi A, Watanabe A, Kawano Y, Sasagasako N, Fujii N. Percutaneous endoscopic gastrostomy in patients with duchenne muscular dystrophy compare with amyotrophic lateral sclerosis: a retrospective study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.763] [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: 11/30/2022]
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14
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Arahata H, Nishiyama T, Inada K, Miyoshi A, Watanabe A, Kawano Y, Sasagasako N, Fujii N. Percutaneous endoscopic gastrostomy in patients with Duchenne muscular dystrophy compared with amyotrophic lateral sclerosis and Parkinson syndrome. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.041] [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: 10/18/2022]
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15
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Pereira VB, da Cunha VP, Preisser TM, Souza BM, Turk MZ, De Castro CP, Azevedo MSP, Miyoshi A. Lactococcus lactis carrying a DNA vaccine coding for the ESAT-6 antigen increases IL-17 cytokine secretion and boosts the BCG vaccine immune response. J Appl Microbiol 2017; 122:1657-1662. [PMID: 28314076 DOI: 10.1111/jam.13449] [Citation(s) in RCA: 12] [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] [Received: 01/09/2017] [Revised: 03/08/2017] [Accepted: 03/14/2017] [Indexed: 12/19/2022]
Abstract
AIMS A regimen utilizing Bacille Calmette-Guerin (BCG) and another vaccine system as a booster may represent a promising strategy for the development of an efficient tuberculosis vaccine for adults. In a previous work, we confirmed the ability of Lactococcus lactis fibronectin-binding protein A (FnBPA+) (pValac:ESAT-6), a live mucosal DNA vaccine, to produce a specific immune response in mice after oral immunization. In this study, we examined the immunogenicity of this strain as a booster for the BCG vaccine in mice. METHODS AND RESULTS After immunization, cytokine and immunoglobulin profiles were measured. The BCG prime L. lactis FnBPA+ (pValac:ESAT-6) boost group was the most responsive group, with a significant increase in splenic pro-inflammatory cytokines IL-17, IFN-γ, IL-6 and TNF-α compared with the negative control. CONCLUSIONS Based on the results obtained here, we demonstrated that L. lactis FnBPA+ (pValac:ESAT-6) was able to increase the BCG vaccine general immune response. SIGNIFICANCE AND IMPACT OF THE STUDY This work is of great scientific and social importance because it represents the first step towards the development of a booster to the BCG vaccine using L. lactis as a DNA delivery system.
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Affiliation(s)
- V B Pereira
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - V P da Cunha
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - T M Preisser
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - B M Souza
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - M Z Turk
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - C P De Castro
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - M S P Azevedo
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - A Miyoshi
- Laboratório de Tecnologia Genética, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Sugawara M, Kaneda Y, Miyoshi A, Sekizawa H, Dochi O. 201 EFFECT OF A SINGLE SUBCUTANEOUS INJECTION OF FSH AND TIMING OF PROSTAGLANDIN F2α ADMINISTRATION ON SUPEROVULATORY RESPONSE IN JAPANESE BLACK COWS. Reprod Fertil Dev 2017. [DOI: 10.1071/rdv29n1ab201] [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: 11/23/2022] Open
Abstract
Superovulation treatment using FSH requires injection twice a day, for 3 to 4 days. This conventional method requires frequent handling of donors and higher labour costs. Therefore, simplification of the superovulation treatment protocol is needed to reduce animal handling and labour costs. The objective of this study was to investigate the effect of a single subcutaneous FSH injection and the timing of prostaglandin F2α (PGF; cloprostenol) administration on the superovulatory response in Japanese Black cows (Hiraizumi et al. 2015 Theriogenology 83, 466–473) and to determine whether the superovulation treatment protocol can be used in on-farm conditions. A total of 270 Japanese Black cows were used in this study. Twenty Armour units of pFSH dissolved in 30 mL of saline was injected subcutaneously in the neck region. In Experiment 1, 32 cows received an intravaginal progesterone device (CIDR) at random stages of the oestrous cycle (Day 0), and 2 mg of oestradiol benzoate on Day 1 (24 h after CIDR insertion). On Day 6, FSH was injected subcutaneously, and 16 cows were simultaneously injected with 0.5 mg of PGF (0-h PGF, Group A); the other 16 cows were injected with 0.5 mg of PGF at 48 h (on Day 8) after FSH injection (48-h PGF, Group B). The CIDR was removed at 60 h after FSH injection and AI was done 42 to 48 h after CIDR removal. Embryo collections were performed 7 days after AI. In Experiment 2, 238 cows were used in farm conditions. The cows were superstimulated using the same protocol as that used for Group A. Data were analysed by ANOVA for the mean numbers of collected ova/embryos and transferrable embryos and chi-square test for the proportion of transferrable embryos. In Experiment 1, there were no differences in the mean numbers of ova/embryos collected (16.9 ± 12.3 v. 16.1 ± 17.1) or transferrable embryos (11.1 ± 9.5 v. 7.2 ± 6.2). However, the proportion of transferrable embryos for Group A was significantly higher than that of Group B (65.9 v. 44.7%; P < 0.01). In Experiment 2, the mean numbers of ova/embryos collected and transferrable embryos were 15.7 ± 13.3 and 6.8 ± 7.8, respectively. These results showed that a superovulation treatment protocol involving a single subcutaneous injection of FSH with simultaneous PGF injection can be effectively used for Japanese Black cows under on-farm conditions.
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Kusunoki Y, Nakazawa D, Hattanda H, Miyoshi A, Shida H, Masuda S, Tomaru U, Nishio S, Atsumi T, Ishizu A. P15 THE EFFECT OF PEPTIGYLARGININE DEIMINASE 4 INHIBITOR ON MPO-ANCA PRODUCTION IN MOUSE MODEL. Kidney Int Rep 2016. [DOI: 10.1016/j.ekir.2016.09.021] [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: 11/29/2022] Open
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18
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Mori N, Higashiguchi T, Ito A, Murai M, Ohara H, Tsuzuki N, Nakagawa A, Awa H, Miyoshi A, Akihiko F, Uekuzu Y. PT08.1: Pinch Grip Strength is a Simple Indicator for Prognosis and Muscle Depletion in Patients with Far Advanced Cancer. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30326-0] [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: 10/21/2022]
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Aburjaile F, Madec MN, Parayre S, Miyoshi A, Azevedo V, Le Loir Y, Falentin H. The long-term survival of Propionibacterium freudenreichii
in a context of nutrient shortage. J Appl Microbiol 2016; 120:432-40. [DOI: 10.1111/jam.13000] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 10/15/2015] [Accepted: 11/03/2015] [Indexed: 11/27/2022]
Affiliation(s)
- F.F. Aburjaile
- Department of General Biology; Federal University of Minas Gerais; Belo Horizonte Minas Gerais Brazil
- INRA; UMR 1253; Science et Technologie du Lait et de l'Oeuf; Rennes France
- AGROCAMPUS OUEST; UMR1253; UMR Science et Technologie du Lait et de l'Oeuf; Rennes France
| | - M.-N. Madec
- INRA; UMR 1253; Science et Technologie du Lait et de l'Oeuf; Rennes France
- AGROCAMPUS OUEST; UMR1253; UMR Science et Technologie du Lait et de l'Oeuf; Rennes France
| | - S. Parayre
- INRA; UMR 1253; Science et Technologie du Lait et de l'Oeuf; Rennes France
- AGROCAMPUS OUEST; UMR1253; UMR Science et Technologie du Lait et de l'Oeuf; Rennes France
| | - A. Miyoshi
- Department of General Biology; Federal University of Minas Gerais; Belo Horizonte Minas Gerais Brazil
| | - V. Azevedo
- Department of General Biology; Federal University of Minas Gerais; Belo Horizonte Minas Gerais Brazil
| | - Y. Le Loir
- INRA; UMR 1253; Science et Technologie du Lait et de l'Oeuf; Rennes France
- AGROCAMPUS OUEST; UMR1253; UMR Science et Technologie du Lait et de l'Oeuf; Rennes France
| | - H. Falentin
- INRA; UMR 1253; Science et Technologie du Lait et de l'Oeuf; Rennes France
- AGROCAMPUS OUEST; UMR1253; UMR Science et Technologie du Lait et de l'Oeuf; Rennes France
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De Azevedo MSP, Santos Rocha C, Pereira VB, De Oliveira Junior AF, De Sousa CS, Azevedo V, LeBlanc JG, Chatel JM, Miyoshi A. Prospective uses of recombinant Lactococcus lactis expressing both listeriolysin O and mutated internalin A from Listeria monocytogenes as a tool for DNA vaccination. Genet Mol Res 2015; 14:18485-93. [PMID: 26782496 DOI: 10.4238/2015.december.23.36] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In this study, Lactococcus lactis was engineered to express mutated internalin A on its surface and to secrete large amounts of listeriolysin O (LLO) in order to improve its potential as a vehicle for DNA vaccination. Western blotting experiments demonstrated that the bacterium expressed LLO in both the cytoplasmic and extracellular compartments, with higher quantities found in the culture supernatants. A hemolytic assay showed that the recombinant strain secreted 250 ng active LLO/mg total protein. This mInlA/LLO-producing strain of L. lactis may be used as an alternative tool in DNA vaccination against a number of infectious diseases or in cancer therapy.
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Affiliation(s)
- M S P De Azevedo
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - C Santos Rocha
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - V B Pereira
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - A F De Oliveira Junior
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - C S De Sousa
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - V Azevedo
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - J G LeBlanc
- CERELA-CONICET, Chacabuco 145, Tucuman, Argentina
| | - J M Chatel
- Institut National de la Recherche Agronomique, MICALIS (UMR 1319), Domaine de Vilvert, Jouy-en-Josas, France
| | - A Miyoshi
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Steinberg RS, Lima M, Gomes de Oliveira NL, Miyoshi A, Nicoli JR, Neumann E, Nunes AC. Effect of intestinal colonisation by two Lactobacillus strains on the immune response of gnotobiotic mice. Benef Microbes 2015; 5:409-19. [PMID: 24939801 DOI: 10.3920/bm2013.0075] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effect of intestinal colonisation on the immune system was investigated in germ-free mice monoassociated with Lactobacillus strains isolated from calf faeces. Single doses of Lactobacillus acidophilus L36 or Lactobacillus salivarius L38 were administered to germ-free mice by intragastric gavage. Ten days later, the mice were euthanised. Gene expression levels of interleukin 5 (IL-5), IL-6, IL-10, IL-12b, IL-17a, gamma interferon (IFN-γ), transforming growth factor beta 1 (TGF-β1), and tumour necrosis factor alpha (TNF-α) were quantified in segments of the small and large intestines by real time quantitative polymerase chain reaction. All the mice were colonised rapidly after Lactobacillus administration with intestinal counts ranging from 6.53 to 8.26 log cfu/g. L. acidophilus L36 administration increased the expression of cytokines involved with the Th2 (IL-5, IL-6 and TGF-β1) and Th17 (IL-17a, TNF-α and IL-6) inflammatory response, whereas L. salivarius L38 appeared to stimulate a pattern of less diversified cytokines in the intestine. Intragastric gavage of L. acidophilus L36 and L. salivarius L38 induced similar levels of colonisation in the digestive tracts of germ-free mice but stimulated different immune responses in the intestinal mucosa. The different immunomodulation patterns might facilitate the potential use of these lactobacilli as probiotics to treat distinct pathological conditions, for example protection against Citrobacter rodentium infection by stimulating IL-17 production.
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Affiliation(s)
- R S Steinberg
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Campus Pampulha, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - M Lima
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Campus Pampulha, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - N L Gomes de Oliveira
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Campus Pampulha, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - A Miyoshi
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Campus Pampulha, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - J R Nicoli
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - E Neumann
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - A C Nunes
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Campus Pampulha, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
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Bakhtiar SM, Ali A, Baig SM, Barh D, Miyoshi A, Azevedo V. Identifying human disease genes: advances in molecular genetics and computational approaches. Genet Mol Res 2014; 13:5073-87. [PMID: 25061732 DOI: 10.4238/2014.july.4.23] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The human genome project is one of the significant achievements that have provided detailed insight into our genetic legacy. During the last two decades, biomedical investigations have gathered a considerable body of evidence by detecting more than 2000 disease genes. Despite the imperative advances in the genetic understanding of various diseases, the pathogenesis of many others remains obscure. With recent advances, the laborious methodologies used to identify DNA variations are replaced by direct sequencing of genomic DNA to detect genetic changes. The ability to perform such studies depends equally on the development of high-throughput and economical genotyping methods. Currently, basically for every disease whose origen is still unknown, genetic approaches are available which could be pedigree-dependent or -independent with the capacity to elucidate fundamental disease mechanisms. Computer algorithms and programs for linkage analysis have formed the foundation for many disease gene detection projects, similarly databases of clinical findings have been widely used to support diagnostic decisions in dysmorphology and general human disease. For every disease type, genome sequence variations, particularly single nucleotide polymorphisms are mapped by comparing the genetic makeup of case and control groups. Methods that predict the effects of polymorphisms on protein stability are useful for the identification of possible disease associations, whereas structural effects can be assessed using methods to predict stability changes in proteins using sequence and/or structural information.
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Affiliation(s)
- S M Bakhtiar
- Department of Bioinformatics, Mohammad Ali Jinnah University, Islamabad Expressway, Islamabad, Pakistan
| | - A Ali
- Atta-ur-Rahman School of Applied Biosciences, National University of Science and Technology, Islamabad, Pakistan
| | - S M Baig
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Faisalabad, Pakistan
| | - D Barh
- Centre for Genomics and Applied Gene Technology, Institute of Integrative Omics and Applied Biotechnology, Nonakuri, Purba Medinipur, India
| | - A Miyoshi
- Laboratório de Genética Celular e Molecular, Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - V Azevedo
- Laboratório de Genética Celular e Molecular, Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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23
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Del Carmen S, Zurita-Turk M, Lima FA, Dos Santos JC, Leclercq S, Chatel JM, Azevedo V, De Moreno De Leblanc A, Miyoshi A, Leblanc J. A Novel Interleukin-10 Dna Mucosal Delivery System Attenuates Intestinal Inflammation in a Mouse Model. EUR J INFLAMM 2013. [DOI: 10.1177/1721727x1301100308] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Inflammatory bowel diseases (IBD) describe a group of complex intestinal disorders characterized by inflammation in the gastrointestinal tract. Current treatments for IBD include the use of antiinflammatory drugs; furthermore, recombinant lactic acid bacteria have been used as a therapeutic vehicle for anti-inflammatory agents in IBD models. Interleukin-10 (IL-10) is one of the most important anti-inflammatory cytokines; however, its oral administration is limited because it is quickly degraded in the gastrointestinal tract and systemic treatments have led to undesirable side effects. In this study, an engineered invasive strain of Lactococcus (L.) lactis producing Fibronectin Binding Protein A (FnBPA+), from Staphylococcus aureus capable of delivering, directly inside eukaryotic cells, an eukaryotic DNA expression vector containing the ORF coding for IL-10 of Mus musculus (pValac: il-10) was developed and its functionality was evaluated using in vitro and in vivo assays. Functionality of the plasmid and the invasive strain was demonstrated by transfection and invasiveness assays using cell cultures and in vivo in mice by fluorescence microscopy. TNBS inoculated mice that received this novel strain showed lower damage scores in their large intestines (at both macroscopic and microscopic levels), lower microbial translocation to liver, and increased anti-inflammatory/pro-inflammatory cytokine ratios compared to mice that received L. lactis FnBPA+ without the pValac: il-10 plasmid. The effectiveness was demonstrated of this novel DNA delivery therapeutic strategy in the prevention of inflammation using a murine model of colitis.
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Affiliation(s)
- S. Del Carmen
- Centro de Referenciapara Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Argentina (T4000ILC)
| | - M. Zurita-Turk
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (ICB/UFMG), Belo Horizonte, Brazil
| | - F. Alvarenga Lima
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (ICB/UFMG), Belo Horizonte, Brazil
| | - J.S. Coelho Dos Santos
- Laboratório de Inovação Biotecnológica, Fundação Ezequiel Dias (FUNED), Belo Horizonte, Minas Gerais, Brasil
| | - S.Y. Leclercq
- Laboratório de Inovação Biotecnológica, Fundação Ezequiel Dias (FUNED), Belo Horizonte, Minas Gerais, Brasil
| | - J.-M. Chatel
- INRA, UMR1319 Micalis, Commensal and Probiotics-Host Interactions Laboratory, Jouy-en-Josas Cedex, France
| | - V. Azevedo
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (ICB/UFMG), Belo Horizonte, Brazil
| | - A. De Moreno De Leblanc
- Centro de Referenciapara Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Argentina (T4000ILC)
| | - A. Miyoshi
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (ICB/UFMG), Belo Horizonte, Brazil
| | - J.G. Leblanc
- Centro de Referenciapara Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Argentina (T4000ILC)
- Cátedra de Metodologia de la Investigación Cientifíca, Facultad de Medicina, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina
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Santos AR, Barbosa E, Fiaux K, Zurita-Turk M, Chaitankar V, Kamapantula B, Abdelzaher A, Ghosh P, Tiwari S, Barve N, Jain N, Barh D, Silva A, Miyoshi A, Azevedo V. PANNOTATOR: an automated tool for annotation of pan-genomes. Genet Mol Res 2013; 12:2982-9. [PMID: 24065654 DOI: 10.4238/2013.august.16.2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Due to next-generation sequence technologies, sequencing of bacterial genomes is no longer one of the main bottlenecks in bacterial research and the number of new genomes deposited in public databases continues to increase at an accelerating rate. Among these new genomes, several belong to the same species and were generated for pan-genomic studies. A pan-genomic study allows investigation of strain phenotypic differences based on genotypic differences. Along with a need for good assembly quality, it is also fundamental to guarantee good functional genome annotation of the different strains. In order to ensure quality and standards for functional genome annotation among different strains, we developed and made available PANNOTATOR (http://bnet.egr.vcu.edu/iioab/agenote.php), a web-based automated pipeline for the annotation of closely related and well-suited genomes for pan-genome studies, aiming at reducing the manual work to generate reports and corrections of various genome strains. PANNOTATOR achieved 98 and 76% of correctness for gene name and function, respectively, as result of an annotation transfer, with a similarity cut-off of 70%, compared with a gold standard annotation for the same species. These results surpassed the RAST and BASys softwares by 41 and 21% and 66 and 17% for gene name and function annotation, respectively, when there were reliable genome annotations of closely related species. PANNOTATOR provides fast and reliable pan-genome annotation; thereby allowing us to maintain the research focus on the main genotype differences between strains.
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Affiliation(s)
- A R Santos
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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25
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Pereira UP, Soares SC, Blom J, Leal CAG, Ramos RTJ, Guimarães LC, Oliveira LC, Almeida SS, Hassan SS, Santos AR, Miyoshi A, Silva A, Tauch A, Barh D, Azevedo V, Figueiredo HCP. In silico prediction of conserved vaccine targets in Streptococcus agalactiae strains isolated from fish, cattle, and human samples. Genet Mol Res 2013; 12:2902-12. [PMID: 24065646 DOI: 10.4238/2013.august.12.6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Streptococcus agalactiae (Lancefield group B; group B streptococci) is a major pathogen that causes meningoencephalitis in fish, mastitis in cows, and neonatal sepsis and meningitis in humans. The available prophylactic measures for conserving human and animal health are not totally effective and have limitations. Effective vaccines against the different serotypes or genotypes of pathogenic strains from the various hosts would be useful. We used an in silico strategy to identify conserved vaccine candidates in 15 genomes of group B streptococci strains isolated from human, bovine, and fish samples. The degree of conservation, subcellular localization, and immunogenic potential of S. agalactiae proteins were investigated. We identified 36 antigenic proteins that were conserved in all 15 genomes. Among these proteins, 5 and 23 were shared only by human or fish strains, respectively. These potential vaccine targets may help develop effective vaccines that will help prevent S. agalactiae infection.
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Affiliation(s)
- U P Pereira
- AQUAVET - Laboratório de Doenças de Animais Aquáticos, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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26
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Nishii N, Kubo M, Miyoshi A, Nakagawa K, Tanaka M, Nagase S, Morita H, Kusano K, Ito H. High VF zone setting is useful to avoid inappropriate therapy due to rapid atrial fibrillation in a simulation. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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27
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Takaya Y, Kusano K, Tokioka K, Miyoshi A, Nishii N, Nagase S, Nakamura K, Kohno K, Morita H, Ito H. Gender difference in efficacy of corticosteroid therapy for left ventricular function in cardiac sarcoidosis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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de Azevedo M, Innocentin S, Dorella F, Rocha C, Mariat D, Pontes D, Miyoshi A, Azevedo V, Langella P, Chatel JM. Immunotherapy of allergic diseases using probiotics or recombinant probiotics. J Appl Microbiol 2013; 115:319-33. [DOI: 10.1111/jam.12174] [Citation(s) in RCA: 27] [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] [Received: 11/28/2012] [Revised: 02/01/2013] [Accepted: 02/18/2013] [Indexed: 12/11/2022]
Affiliation(s)
- M.S.P. de Azevedo
- Laboratório de Genética Celular e Molecular; Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais (ICB/UFMG); Belo Horizonte MG, Brazil
- INRA; UMR1319 Micalis; Jouy-en-Josas France
- AgroParisTech; UMR Micalis; Jouy-en-Josas France
| | - S. Innocentin
- INRA; UMR1319 Micalis; Jouy-en-Josas France
- AgroParisTech; UMR Micalis; Jouy-en-Josas France
- Lymphocyte Signalling and Development Laboratory; Babraham Institute; Babraham Research Campus; Cambridge CB22 3AT UK
| | - F.A. Dorella
- Laboratório de Genética Celular e Molecular; Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais (ICB/UFMG); Belo Horizonte MG, Brazil
| | - C.S. Rocha
- Laboratório de Genética Celular e Molecular; Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais (ICB/UFMG); Belo Horizonte MG, Brazil
| | - D. Mariat
- INRA; UMR1319 Micalis; Jouy-en-Josas France
- AgroParisTech; UMR Micalis; Jouy-en-Josas France
| | - D.S. Pontes
- Departamento de Ciências Biológicas; Universidade Estadual da Paraíba; Campus V; João Pessoa PB, Brazil
| | - A. Miyoshi
- Laboratório de Genética Celular e Molecular; Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais (ICB/UFMG); Belo Horizonte MG, Brazil
| | - V. Azevedo
- Laboratório de Genética Celular e Molecular; Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais (ICB/UFMG); Belo Horizonte MG, Brazil
| | - P. Langella
- INRA; UMR1319 Micalis; Jouy-en-Josas France
- AgroParisTech; UMR Micalis; Jouy-en-Josas France
| | - J.-M. Chatel
- INRA; UMR1319 Micalis; Jouy-en-Josas France
- AgroParisTech; UMR Micalis; Jouy-en-Josas France
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29
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Dorneles EMS, Santana JA, Andrade GI, Santos ELS, Guimarães AS, Mota RA, Santos AS, Miyoshi A, Azevedo V, Gouveia AMG, Lage AP, Heinemann MB. Molecular characterization of Corynebacterium pseudotuberculosis isolated from goats using ERIC-PCR. Genet Mol Res 2012; 11:2051-9. [PMID: 22911589 DOI: 10.4238/2012.august.6.9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Corynebacterium pseudotuberculosis, the infectious agent of caseous lymphadenitis (CLA), is responsible for substantial economic losses in goat and sheep production. Molecular characterization of C. pseudotuberculosis isolates by enterobacterial repetitive intergenic consensus (ERIC)-PCR has shown promising results in genotyping strains isolated from sheep with CLA. We evaluated the genetic diversity of C. pseudotuberculosis isolates collected from the Sertão region of the Pernambuco (PE) State, Brazil, and investigated the potential of ERIC-PCR as a tool for the molecular typing of strains of C. pseudotuberculosis isolated from goats. Thirty-two C. pseudotuberculosis strains isolated from goats in the municipalities of Floresta and Ibimirim, PE, C. pseudotuberculosis type strain ATCC 19410, the 1002 vaccine strain, and a field isolate of Rhodococcus equi were fingerprinted using the primers ERIC-1R and ERIC-2 and the primer pair ERIC- 1R+ERIC-2. Using 100% similarity as the cutoff, 8, 10, and 7 genotypes were obtained with ERIC-1-PCR, ERIC-2-PCR, and ERIC-1+2-PCR, respectively. The Hunter-Gaston discriminatory index calculated for the ERIC-1-PCR was 0.75. The index for the ERIC-2-PCR was 0.88, and the index for the ERIC-1+2-PCR was 0.79. Among goat isolates of C. pseudotuberculosis, three, two and four genotypes (found by ERIC-1-PCR, ERIC-2-PCR, and ERIC-1+2-PCR, respectively) had been previously described among sheep isolates from Minas Gerais State, Brazil. These results showed that ERIC-PCR has good discriminatory power and typeability, making it a useful tool for discrimination among C. pseudotuberculosis isolates from goats.
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Affiliation(s)
- E M S Dorneles
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Carmo FD, Guimarães A, Pauletti R, Lage A, Gonçalves V, Meyer R, Portela R, Miyoshi A, Azevedo V, Gouveia A, Heinemann M. Prevalência de anticorpos contra a linfadenite caseosa em criações comerciais de ovinos no Distrito Federal, Brasil. Arq Inst Biol 2012. [DOI: 10.1590/s1808-16572012000200020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
O objetivo deste trabalho foi determinar a prevalência de anticorpos contra linfadenite caseosa (LC) em rebanhos ovinos comerciais do Distrito Federal (DF). Foram coletadas 1.028 amostras de soro entre março e junho de 2004, de todas as propriedades (32) do Distrito Federal com pelo menos 20 fêmeas adultas no rebanho. A soroprevalência da linfadenite caseosa foi determinada por ELISA com proteínas secretadas de Corynebacterium pseudotuberculosis. Cinquenta por cento das 32 propriedades apresentaram pelo menos um animal soropositivo para o LC e a prevalência real para animais foi de 44,0% (IC 95: 41,0; 47,0), portanto, esses dados sugerem que a LC está presente em rebanhos ovinos comerciais no Distrito Federal.
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Affiliation(s)
| | - A.S. Guimarães
- Escola de Veterinária, Brasil; Embrapa Gado de Leite, Brasil
| | | | | | | | - R. Meyer
- Universidade Federal da Bahia, Brasil
| | | | - A. Miyoshi
- Universidade Federal de Minas Gerais, Brasil
| | - V. Azevedo
- Universidade Federal de Minas Gerais, Brasil
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31
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de Azevedo MSP, Rocha CS, Electo N, Pontes DS, Molfetta JB, Gonçalves EDC, Azevedo V, Silva CL, Miyoshi A. Cytoplasmic and extracellular expression of pharmaceutical-grade mycobacterial 65-kDa heat shock protein in Lactococcus lactis. Genet Mol Res 2012; 11:1146-57. [PMID: 22614283 DOI: 10.4238/2012.april.27.14] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Lactic acid bacteria (LAB) are an attractive and safe alternative for the expression of heterologous proteins, as they are nonpathogenic and endotoxin-free organisms. Lactococcus lactis, the LAB model organism, has been extensively employed in the biotechnology field for large-scale production of heterologous proteins, and its use as a "cell factory" has been widely studied. We have been particularly interested in the use of L. lactis for production of heat shock proteins (HSPs), which reportedly play important roles in the initiation of innate and adaptive immune responses. However, this activity has been questioned, as LPS contamination appears to be responsible for most, if not all, immunostimulatory activity of HSPs. In order to study the effect of pure HSPs on the immune system, we constructed recombinant L. lactis strains able to produce and properly address the Mycobacterium leprae 65-kDa HSP (Hsp65) to the cytoplasm or to the extracellular medium, using a xylose-induced expression system. Approximately 7 mg/L recombinant Hsp65 was secreted. Degradation products related to lactococcal HtrA activity were not observed, and the Limulus amebocyte lysate assay demonstrated that the amount of LPS in the recombinant Hsp65 preparations was 10-100 times lower than the permitted levels established by the U.S. Food and Drug Administration. These new L. lactis strains will allow investigation of the effects of M. leprae Hsp65 without the interference of LPS; consequently, they have potential for a variety of biotechnological, medical and therapeutic applications.
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Affiliation(s)
- M S P de Azevedo
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Abstract
The large number of microbial genomes deposited in databanks has opened the door for in-depth studies of organisms, including post-genomics investigations. Thanks to new generation sequencing technology, these studies have made advances that have lead to extraordinary discoveries in bacterial transcriptomics. In this review, we describe bacterial RNA sequencing studies that use these new techniques. We also examined the advantages and biases of these new generation technologies; advances in bioinformatics make it possible to overcome the biases, providing interesting and surprising results.
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Affiliation(s)
- A C Pinto
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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33
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Isobe K, Adachi K, Hayashi S, Ito T, Miyoshi A, Kato A, Suzuki M. Spontaneous glomerular and tubulointerstitial lesions in common marmosets (Callithrix jacchus). Vet Pathol 2011; 49:839-45. [PMID: 22156228 DOI: 10.1177/0300985811427151] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Spontaneous progressive nephropathy dominated by glomerular lesions in common marmosets has been reported. However, the histopathologic characteristics, including the relationship between glomerular and tubulointerstitial lesions, have not been described in detail. In the present study, the authors examined the histopathologic characteristics of the background renal lesions in common marmosets (3 males and 9 females, 3 to 8 years old). The severity of glomerular lesions was graded into 3 classes: grade I, no alteration; grade II, hilar/focal increase of mesangial matrix; grade III, global/diffuse increase of mesangial matrix. Tubulointerstitial lesions (tubular regeneration and hyperplasia and interstitial inflammation and fibrosis) were scored according to the area of each lesion. The renal lesions were characterized by enlargement of glomeruli, expanded mesangial area with increase of periodic acid-Schiff reaction-positive matrix, tubular regeneration and hyperplasia, and interstitial inflammation and fibrosis. Glomerular lesions progressed with increasing mesangial matrix and aging. Additionally, the tubulointerstitial lesions became exacerbated with progressing glomerular lesions. Tubular hyperplasia was divided into 4 types according to the structure of the cell layer (simple or stratified-like), the area of increased lining cells (partial or entire), cytoplasmic staining (eosinophilic or basophilic), brush border and thickness of basement membrane, and the activity of cell proliferation. In conclusion, the background renal lesions in common marmosets were characterized by glomerular lesions with increase of mesangial matrix, which progressed with aging, and secondary tubulointerstitial lesions, including tubular hyperplasia. Those lesions were thus diagnosed as progressive glomerulonephropathy in common marmosets.
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Affiliation(s)
- K Isobe
- Safety Assessment Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan.
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Resende B, Rebelato A, D'Afonseca V, Santos A, Stutzman T, Azevedo V, Santos L, Miyoshi A, Lopes D. DNA repair in Corynebacterium model. Gene 2011; 482:1-7. [DOI: 10.1016/j.gene.2011.03.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 02/28/2011] [Accepted: 03/28/2011] [Indexed: 10/18/2022]
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35
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Okazawa M, Masuhara K, Miyoshi A, Fujiwara K, Ohta Y, Yoshino K, Kamiura S, Tomita Y. A rare case of ovarian carcinosarcoma successfully treated with the neoadjuvant chemotherapy of paclitaxel and ifosfamide. J OBSTET GYNAECOL 2011; 31:274-5. [PMID: 21417665 DOI: 10.3109/01443615.2010.549971] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- M Okazawa
- Department of Gynecology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
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36
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Soares SC, Dorella FA, Pacheco LGC, Hirata R, Mattos-Guaraldi AL, Azevedo V, Miyoshi A. Plasticity of Corynebacterium diphtheriae pathogenicity islands revealed by PCR. Genet Mol Res 2011; 10:1290-4. [PMID: 21732292 DOI: 10.4238/vol10-2gmr1211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Despite the existence of a vaccine against diphtheria, this disease remains endemic and is reemerging in several regions due to many factors, including variations in genes coding for virulence factors. One common feature of virulence factors is their high concentration in pathogenicity islands (PAIs), very unstable regions acquired via horizontal gene transfer, which has lead to the emergence of various bacterial pathogens. The 13 putative PAIs in Corynebacterium diphtheriae NCTC 13129 and the reemergence of this disease point to the great variability in the PAIs of this species, which may reflect on bacterial life style and physiological versatility. We investigated the relationships between the large number of PAIs in C. diphtheriae and the possible implications of their plasticity in virulence. The GenoFrag software was used to design primers to analyze the genome plasticity of two pathogenicity islands of the reference strain (PiCds 3 and 8) in 11 different strains. We found that PiCd 3 was absent in only two strains, showing genes playing putative important roles in virulence and that only one strain harbored PiCd 8, due to its location in a putative "hotspot" for horizontal gene transfer events.
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Affiliation(s)
- S C Soares
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Marinho FAV, Pacífico LGG, Miyoshi A, Azevedo V, Le Loir Y, Guimarães VD, Langella P, Cassali GD, Fonseca CT, Oliveira SC. An intranasal administration of Lactococcus lactis strains expressing recombinant interleukin-10 modulates acute allergic airway inflammation in a murine model. Clin Exp Allergy 2011; 40:1541-51. [PMID: 20412136 DOI: 10.1111/j.1365-2222.2010.03502.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Around 300 million people world-wide suffer from asthma, and the prevalence of allergic diseases has increased. Much effort has been used in the study of mechanisms involved in the immune response observed in asthma to intervene for the treatment of this condition. During inflammation in asthma, Th2 cytokines and eosinophils are essential components of the host immune system. Furthermore, for therapeutic interventions against this disease, IL-10 is an important cytokine because it has a central role in the regulation of inflammatory cascades. OBJECTIVE To evaluate the immunomodulatory effect of Lactococcus lactis strains expressing recombinant IL-10 in a mouse model of ovalbumin (OVA)-induced acute airway inflammation. METHODS L. lactis expressing recombinant IL-10 in a cytoplasmic (LL-CYT) or secreted form (LL-SEC) and wild-type (LL-WT) were used. IL-10 production by the recombinant strains was evaluated by ELISA. After an intranasal administration of L. lactis producing recombinant IL-10 and the induction of acute allergic airway inflammation in mice, blood samples were collected to detect IgE anti-OVA, and bronchoalveolar lavage (BAL) was harvested for eosinophil count. Additionally, the lungs were collected for the detection of the eosinophil peroxidase (EPO) activity, measurement of cytokines and chemokines and evaluation of pathology. RESULTS Mice that received LL-CYT and LL-SEC strains showed a significant decrease in eosinophils numbers, EPO activity, anti-OVA IgE and IgG1 levels, IL-4 and CCL3 production and pulmonary inflammation and mucus hypersecretion, compared with the asthmatic group. Only the LL-CYT/OVA group showed reduced levels of IL-5, CCL2, CCL5 and CCL11. CONCLUSION Treatment with L. lactis producing recombinant IL-10 used in this study (LL-CYT and LL-SEC) modulated experimental airway inflammation in the mouse model independently of Treg cells. Additionally, the LL-CYT strain was more efficient in the suppression of lung inflammation.
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Affiliation(s)
- F A V Marinho
- Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais Minas Gerais, Belo Horizonte, MG, Brazil
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Hirata R, Pacheco LG, Soares SC, Santos LS, Moreira LO, Sabbadini PS, Santos CS, Miyoshi A, Azevedo VA, Mattos-Guaraldi AL. Similarity of rpoB gene sequences of sucrose-fermenting and non-fermenting Corynebacterium diphtheriae strains. Antonie van Leeuwenhoek 2010; 99:733-7. [DOI: 10.1007/s10482-010-9519-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Accepted: 09/30/2010] [Indexed: 11/30/2022]
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Seyffert N, Guimarães AS, Pacheco LGC, Portela RW, Bastos BL, Dorella FA, Heinemann MB, Lage AP, Gouveia AMG, Meyer R, Miyoshi A, Azevedo V. High seroprevalence of caseous lymphadenitis in Brazilian goat herds revealed by Corynebacterium pseudotuberculosis secreted proteins-based ELISA. Res Vet Sci 2009; 88:50-5. [PMID: 19665155 DOI: 10.1016/j.rvsc.2009.07.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 06/02/2009] [Accepted: 07/03/2009] [Indexed: 11/28/2022]
Abstract
We conducted a seroepidemiological survey to determine the prevalence of caseous lymphadenitis (CLA) in goat herds in Minas Gerais state, Brazil. Serum samples were collected from goats (n=676) from 108 rural properties in 2001, covering most of the sub-regions of this ca. 586,500 square kilometer state. Antibodies against Corynebacterium pseudotuberculosis secreted proteins were detected by an indirect enzyme-linked immunosorbent assay (ELISA). Most of the animals (78.9%) tested positive for CLA; 98% of flocks presented at least one seropositive animal. Goats managed under an extensive production system had a significantly higher seroprevalence of CLA than those in intensive and semi-intensive operations. The age distribution of the animals in the flocks affected the prevalence of this disease; however, goat breed did not. We found seropositivity against C. pseudotuberculosis to be highly prevalent in these Brazilian goat herds; consequently, appropriate management practices for the control of CLA should be implemented.
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Affiliation(s)
- N Seyffert
- Laboratório de Genética Celular e Molecular, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 31270-901, Belo Horizonte, MG, Brazil
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Oliveira MN, Almeida KE, Damin MR, Rochat T, Gratadoux JJ, Miyoshi A, Langella P, Azevedo V. Behavior and viability of spontaneous oxidative stress-resistant Lactococcus lactis mutants in experimental fermented milk processing. Genet Mol Res 2009; 8:840-7. [PMID: 19731206 DOI: 10.4238/vol8-3gmr635] [Citation(s) in RCA: 4] [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] [Indexed: 11/03/2022]
Abstract
Previously, we isolated two strains of spontaneous oxidative (SpOx2 and SpOx3) stress mutants of Lactococcus lactis subsp cremoris. Herein, we compared these mutants to a parental wild-type strain (J60011) and a commercial starter in experimental fermented milk production. Total solid contents of milk and fermentation temperature both affected the acidification profile of the spontaneous oxidative stress-resistant L. lactis mutants during fermented milk production. Fermentation times to pH 4.7 ranged from 6.40 h (J60011) to 9.36 h (SpOx2); V(max) values were inversely proportional to fermentation time. Bacterial counts increased to above 8.50 log(10) cfu/mL. The counts of viable SpOx3 mutants were higher than those of the parental wild strain in all treatments. All fermented milk products showed post-fermentation acidification after 24 h of storage at 4 degrees C; they remained stable after one week of storage.
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Affiliation(s)
- M N Oliveira
- Departamento de Tecnologia Farmacêutica e Bioquímica, Universidade de São Paulo, São Paulo, SP, Brasil.
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Mattos-Guaraldi AL, Sampaio JLM, Santos CS, Pimenta FP, Pereira GA, Pacheco LGC, Miyoshi A, Azevedo V, Moreira LO, Gutierrez FL, Costa JLF, Costa-Filho R, Damasco PV, Camello TCF, Hirata Jr R. First detection of Corynebacterium ulcerans producing a diphtheria-like toxin in a case of human with pulmonary infection in the Rio de Janeiro metropolitan area, Brazil. Mem Inst Oswaldo Cruz 2008; 103:396-400. [DOI: 10.1590/s0074-02762008000400014] [Citation(s) in RCA: 40] [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] [Received: 09/09/2007] [Accepted: 06/05/2008] [Indexed: 11/21/2022] Open
Affiliation(s)
| | - JLM Sampaio
- Fleury Centro de Medicina Diagnóstica, Brasil
| | - CS Santos
- Universidade do Estado do Rio de Janeiro, Brasil; Universidade Federal do Rio de Janeiro, Brasil
| | - FP Pimenta
- Universidade do Estado do Rio de Janeiro, Brasil
| | - GA Pereira
- Universidade do Estado do Rio de Janeiro, Brasil
| | - LGC Pacheco
- Universidade Federal de Minas Gerais, Brasil
| | - A Miyoshi
- Universidade Federal de Minas Gerais, Brasil
| | - V Azevedo
- Universidade Federal de Minas Gerais, Brasil
| | - LO Moreira
- Universidade do Estado do Rio de Janeiro, Brasil
| | | | | | | | - PV Damasco
- Universidade do Estado do Rio de Janeiro, Brasil; Universidade Federal do Estado do Rio de Janeiro, Brasil
| | - TCF Camello
- Universidade do Estado do Rio de Janeiro, Brasil
| | - R Hirata Jr
- Universidade do Estado do Rio de Janeiro, Brasil
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D'Afonseca V, Moraes PM, Dorella FA, Pacheco LGC, Meyer R, Portela RW, Miyoshi A, Azevedo V. A description of genes of Corynebacterium pseudotuberculosis useful in diagnostics and vaccine applications. Genet Mol Res 2008; 7:252-60. [PMID: 18551390 DOI: 10.4238/vol7-1gmr438] [Citation(s) in RCA: 22] [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: 11/03/2022]
Abstract
Corynebacterium pseudotuberculosis, a Gram-positive intracellular pathogen, is the etiological agent of caseous lymphadenitis or CLA. This bacterium infects goats and sheep and causes great economic losses worldwide annually, mainly for goat producers. Despite its importance, CLA is still poorly characterized. However, with advances in the genomic field, many C. pseudotuberculosis genes have already been characterized, mainly those related to virulence such as phospholipase D. Here, we examined the use of the several available genes of C. pseudotuberculosis and reviewed their applications in vaccine construction, more efficient diagnostics for CLA, and control of this disease, among other applications.
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Affiliation(s)
- V D'Afonseca
- Laboratório de Genética Celular e Molecular, Departamento de Biologia Geral, ICB-UFMG, Belo Horizonte, MG, Brasil
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Yuasa I, Umetsu K, Harihara S, Kido A, Miyoshi A, Saitou N, Dashnyam B, Jin F, Lucotte G, Chattopadhyay PK, Henke L, Henke J. Distribution of two Asian-related coding SNPs in the MC1R and OCA2 genes. Biochem Genet 2007; 45:535-42. [PMID: 17570052 DOI: 10.1007/s10528-007-9095-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Accepted: 03/02/2007] [Indexed: 11/26/2022]
Abstract
Very little is known about the genes and mechanisms affecting skin lightening in Asian populations. In this study, two coding SNPs, c.G1129A (R163Q) at the MC1R (melanocortin 1 receptor) gene and c.A1962G (H615R) at the OCA2 (oculocutaneous albinism type II) gene, were investigated in a total of 1,809 individuals in 16 populations from various areas. The Q163 and R615 alleles prevailed almost exclusively in East and Southeast Asian populations. Wright's F (ST) was 0.445 for R163Q and 0.385 for H615R among the 16 populations. The frequency of the Q163 allele was higher in Northeast Asians than in Southeast Asians. The frequency of the R615 allele was highest in South China and unlikely to be associated with levels of ultraviolet radiation. This allele may be a good marker to study the genetic affinity among East Asians because of its restricted distribution and marked difference in allele frequency.
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Affiliation(s)
- I Yuasa
- Division of Legal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan.
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Miyoshi A, Kitajima Y, Ide T, Ohtaka K, Nagasawa H, Uto Y, Hori H, Miyazaki K. Hypoxia accelerates cancer invasion of hepatoma cells by upregulating MMP expression in an HIF-1alpha-independent manner. Int J Oncol 2007; 29:1533-9. [PMID: 17088993 DOI: 10.3892/ijo.29.6.1533] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 11/06/2022] Open
Abstract
Tumor hypoxia has been reported to induce tumor progression in several carcinomas. Current studies have shown that hypoxia inducible factor-1alpha (HIF-1alpha) is stabilized under hypoxic conditions and transactivates various genes related to cancer aggressiveness. In the present study, we examined whether hypoxia affects cancer invasion in hepatocellular carcinoma. We aimed to solve the molecular mechanism of tumor invasion under the hypoxic condition. We showed that tumor hypoxia accelerated cancer invasion in two hepatoma cell lines. Using Western blot and RT-PCR analyses we demonstrated striking evidence that the expression of HIF-1alpha, ETS-1, MMP-7 and MT1-MMP was strongly upregulated by hypoxic stimulation. To examine whether these invasion-related genes are regulated by HIF-1alpha, we treated hepatoma cells with TX-402, which was reported to repress HIF-1alpha expression. HIF-1alpha expression was strongly repressed by the TX-402 treatment. In contrast, the expression of ETS-1, MMP-7 and MT1-MMP mRNA was not affected by TX-402 treatment. We further established stable transfectants in which HIF-1alpha dominant negative vector was introduced into Hep3B cells (pHIF-1alphaDN). In the pHIF-1alphaDN cells, the expression of ETS-1, MMP-7 and MT1-MMP was not repressed. Moreover, the invasion activity of pHIF-1alphaDN was not altered, compared with that of the mock. In hepatoma cells, we provided evidence that hypoxic stress accelerates cancer invasion by upregulating ETS-1 and the MMP family by an HIF-1alpha-independent pathway.
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Affiliation(s)
- A Miyoshi
- Department of Surgery, Saga University Faculty of Medicine, Saga 849-8501, Japan
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Dorella FA, Fachin MS, Billault A, Dias Neto E, Soravito C, Oliveira SC, Meyer R, Miyoshi A, Azevedo V. Construction and partial characterization of a Corynebacterium pseudotuberculosis bacterial artificial chromosome library through genomic survey sequencing. Genet Mol Res 2006; 5:653-63. [PMID: 17183477] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Corynebacterium pseudotuberculosis is a gram-positive bacterium that causes caseous lymphadenitis in sheep and goats. However, despite the economic losses caused by caseous lymphadenitis, there is little information about the molecular mechanisms of pathogenesis of this bacterium. Genomic libraries constructed in bacterial artificial chromosome (BAC) vectors have become the method of choice for clone development in high-throughput genomic-sequencing projects. Large-insert DNA libraries are useful for isolation and characterization of important genomic regions and genes. In order to identify targets that might be useful for genome sequencing, we constructed a C. pseudotuberculosis BAC library in the vector pBeloBAC11. This library contains about 18,000 BAC clones, with inserts ranging in size from 25 to 120 kb, theoretically representing a 390-fold coverage of the C. pseudotuberculosis genome (estimated to be 2.5-3.1 Mb). Many genomic survey sequences (GSSs) with homology to C. diphtheriae, C. glutamicum, C. efficiens, and C. jeikeium proteins were observed within a sample of 215 sequenced clones, confirming their close phylogenetic relationship. Computer analyses of GSSs did not detect chimeric, deleted, or rearranged BAC clones, showing that this library has low redundancy. This GSSs collection is now available for further genetic and physical analysis of the C. pseudotuberculosis genome. The GSS strategy that we used to develop our library proved to be efficient for the identification of genes and will be an important tool for mapping, assembly, comparative, and functional genomic studies in a C. pseudotuberculosis genome sequencing project that will begin this year.
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Affiliation(s)
- F A Dorella
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Yuasa I, Umetsu K, Harihara S, Kido A, Miyoshi A, Saitou N, Dashnyam B, Jin F, Lucotte G, Chattopadhyay PK, Henke L, Henke J. Distribution of the F374 Allele of the SLC45A2 (MATP) Gene and Founder-Haplotype Analysis. Ann Hum Genet 2006; 70:802-11. [PMID: 17044855 DOI: 10.1111/j.1469-1809.2006.00261.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [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: 11/28/2022]
Abstract
The membrane-associated transporter protein (MATP) plays an important role in melanin synthesis. The L374F mutation in the SLC45A2 gene encoding MATP has been suggested to be associated with skin colour in major human populations. In this study more detailed distribution of the F374 allele was investigated in 1649 unrelated subjects from 13 Eurasian populations and one African population. The highest allele frequency was observed in Germans (0.965); French and Italians showed somewhat lower frequencies; and Turks had an intermediate value (0.615). Indians and Bangladeshis from South Asia were characterized by low frequencies (0.147 and 0.059, respectively). We also found the F374 allele in some East and Southeast Asian populations, and explained this by admixture. Haplotype analysis revealed that the haplotype diversity was much lower in Germans than in Japanese, and suggest that the L374F mutation occurred only once in the ancestry of Caucasians. The large differences in distribution of the F374 allele and its haplotypes suggest that this allele may be an important factor in hypopigmentation in Caucasian populations.
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Affiliation(s)
- I Yuasa
- Division of Legal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan.
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Cortes-Perez NG, Poquet I, Oliveira M, Gratadoux JJ, Madsen SM, Miyoshi A, Corthier G, Azevedo V, Langella P, Bermúdez-Humarán LG. Construction and characterization of a Lactococcus lactis strain deficient in intracellular ClpP and extracellular HtrA proteases. Microbiology (Reading) 2006; 152:2611-2618. [PMID: 16946256 DOI: 10.1099/mic.0.28698-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A Lactococcus lactis strain deficient in both its major proteases, intracellular (ClpP) and extracellular (HtrA), was constructed and characterized. This strain, hereafter called clpP-htrA, could be obtained only by conjugation between a clpP donor strain and an htrA recipient strain in the NZ9000 context, allowing heterologous gene expression under the control of the NICE (nisin-controlled expression) system. The clpP-htrA double mutant showed both higher stress tolerance (e.g. high temperature and ethanol resistance) and higher viability than single clpP or htrA mutant strains. In addition, the secretion rate of two heterologous proteins (staphylococcal nuclease Nuc and Nuc-E7) was also higher in clpP-htrA than in the wild-type strain. This strain should be a useful host for high-level production and quality of stable heterologous proteins.
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Affiliation(s)
- N G Cortes-Perez
- Unité d'Ecologie et de Physiologie du Système Digestif, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
| | - I Poquet
- Unité des Bactéries Lactiques et Pathogènes Opportunistes, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
| | - M Oliveira
- Institute of Biological Sciences, Federal University of Minas Gerais (UFMG-ICB), Belo Horizonte, Minas Gerais, Brazil
- Unité d'Ecologie et de Physiologie du Système Digestif, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
| | - J J Gratadoux
- Unité d'Ecologie et de Physiologie du Système Digestif, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
| | | | - A Miyoshi
- Institute of Biological Sciences, Federal University of Minas Gerais (UFMG-ICB), Belo Horizonte, Minas Gerais, Brazil
| | - G Corthier
- Unité d'Ecologie et de Physiologie du Système Digestif, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
| | - V Azevedo
- Institute of Biological Sciences, Federal University of Minas Gerais (UFMG-ICB), Belo Horizonte, Minas Gerais, Brazil
| | - P Langella
- Unité d'Ecologie et de Physiologie du Système Digestif, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
| | - L G Bermúdez-Humarán
- Unité d'Ecologie et de Physiologie du Système Digestif, INRA, Domaine de Vilvert, 78352 Jouy en Josas cedex, France
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Takagi M, Takagaki K, Kamimura S, Zizhohara K, Miyoshi A, Yasuda Y, Kawasaki Y, Endo Y, Ohishi A, Yasumura E, Deguchi E. Primary erythrocytosis in a Japanese black calf: a case report. ACTA ACUST UNITED AC 2006; 53:296-9. [PMID: 16901273 DOI: 10.1111/j.1439-0442.2006.00846.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/30/2022]
Abstract
An 8-month-old Japanese Black heifer with severe erythropoietic symptoms was subjected to clinical, histological and cytological examinations. During the 1 month clinical observation period, severe increases in RBC count, packed cell volume and haemoglobin concentration were observed. The plasma erythropoietin (Epo) concentration of the heifer (20.7 mIU/ml) was similar to that observed in normal control heifers. Blood gas examinations of the arterial and venous blood revealed low levels of partial pressure O(2) (PaO(2)), partial pressure CO(2) (PaCO(2)) and O(2) saturation (SaO(2)), while the blood pH was within the normal range. Gross lesions could not be detected. However, microscopic observation revealed severe proliferation of erythroblasts in the bone marrow and in the spleen without evidence of neoplastic changes. Based on these clinical and pathological examinations, we diagnosed the heifer as being the first case of primary erythrocytosis in Japanese Black cattle.
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Affiliation(s)
- M Takagi
- Laboratory of Farm Animal Production Medicine, Veterinary Teaching Hospital, Kagoshima University, Kagoshima, Japan.
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Dorella FA, Estevam EM, Cardoso PG, Savassi BM, Oliveira SC, Azevedo V, Miyoshi A. An improved protocol for electrotransformation of Corynebacterium pseudotuberculosis. Vet Microbiol 2006; 114:298-303. [PMID: 16442751 DOI: 10.1016/j.vetmic.2005.12.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Revised: 12/09/2005] [Accepted: 12/13/2005] [Indexed: 10/25/2022]
Abstract
We developed an improved protocol for the electrotransformation of Corynebacterium pseudotuberculosis, testing variations of parameters in the procedures that are routinely used for the preparation of electrocompetent cells of this species, including (i) culture conditions, (ii) cell growth phase, (iii) electroporation solutions and (iv) quantity of plasmid DNA. We obtained the greatest efficiency of transformation when the cells were grown until the stationary phase and then washed with 10% glycerol electroporation solution. The transformation efficiency was inversely proportional to the quantity of plasmid DNA. The transformation efficiency reached 10(5) colony-forming units (cfu)/mug plasmid DNA. This protocol would be useful for genetic studies of C. pseudotuberculosis.
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Affiliation(s)
- F A Dorella
- Laboratório de Genética Celular e Molecular, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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