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Konno Y, Yamada M, Suzuki M, Maeda Y. Stepwise Functionalization of Single-Walled Carbon Nanotubes with Subsequent Molecular Conversion to Control Photoluminescence Properties. Chemistry 2023; 29:e202301707. [PMID: 37460442 DOI: 10.1002/chem.202301707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Indexed: 08/06/2023]
Abstract
Functionalization of single-walled carbon nanotubes (SWCNTs) has attracted interest because it alters the near-infrared (NIR) photoluminescence (PL) wavelength and emission efficiency. These modifications depend on the binding configuration and degree of functionalization. Excessive functionalization reduces the emission efficiency as the integrity of the conjugated π system decreases; thus, controlling the degree of functionalization is essential. Because the binding configurations and degree of functionalization are affected by the reagent structure, a stepwise approach combining SWCNTs functionalization and subsequent reactions to introduce functional groups into the addenda could effectively control their PL properties and functionalities. We studied this approach by implementing the reductive alkylation of SWCNTs by using bromoalkanes with t-butyl carbamate (Boc)-protected amino groups and subsequent deprotection and amidation reactions. The reaction products were analyzed based on absorption, PL, and Raman spectroscopy and the Kaiser test. Depending on the structure of the reagent, deprotection and amidation reactions competed with the elimination reaction of addenda, altering the PL properties of the SWCNTs. Furthermore, the elimination reaction was inhibited in the adducts functionalized using dibromoalkane with Boc-protected amino groups, demonstrating that the use of appropriate reagents enables the molecular conversion of the functional groups of SWCNT adducts without affecting their PL properties.
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Affiliation(s)
- Yui Konno
- Division of Mathematics and Natural Science Education, The United Graduate School of Education, Tokyo Gakugei University, 184-8501, Tokyo, Japan
| | - Michio Yamada
- Division of Mathematics and Natural Science Education, The United Graduate School of Education, Tokyo Gakugei University, 184-8501, Tokyo, Japan
- Department of Chemistry, Tokyo Gakugei University, 184-8501, Tokyo, Japan
| | - Mitsuaki Suzuki
- Department of Chemistry, Josai University, 350-0295, Sakado, Japan
| | - Yutaka Maeda
- Division of Mathematics and Natural Science Education, The United Graduate School of Education, Tokyo Gakugei University, 184-8501, Tokyo, Japan
- Department of Chemistry, Tokyo Gakugei University, 184-8501, Tokyo, Japan
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2
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Maeda Y, Suzuki Y, Konno Y, Zhao P, Kikuchi N, Yamada M, Mitsuishi M, Dao ATN, Kasai H, Ehara M. Selective emergence of photoluminescence at telecommunication wavelengths from cyclic perfluoroalkylated carbon nanotubes. Commun Chem 2023; 6:159. [PMID: 37524908 PMCID: PMC10390534 DOI: 10.1038/s42004-023-00950-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 07/04/2023] [Indexed: 08/02/2023] Open
Abstract
Chemical functionalisation of semiconducting single-walled carbon nanotubes (SWNTs) can tune their local band gaps to induce near-infrared (NIR) photoluminescence (PL). However, tuning the PL to telecommunication wavelengths (>1300 nm) remains challenging. The selective emergence of NIR PL at the longest emission wavelength of 1320 nm was successfully achieved in (6,5) SWNTs via cyclic perfluoroalkylation. Chiral separation of the functionalised SWNTs showed that this functionalisation was also effective in SWNTs with five different chiral angles. The local band gap modulation mechanism was also studied using density functional theory calculations, which suggested the effects of the addenda and addition positions on the emergence of the longest-wavelength PL. These findings increase our understanding of the functionalised SWNT structure and methods for controlling the local band gap, which will contribute to the development and application of NIR light-emitting materials with widely extended emission and excitation wavelengths.
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Affiliation(s)
- Yutaka Maeda
- Department of Chemistry, Tokyo Gakugei University, Tokyo, 184-8501, Japan.
| | - Yasuhiro Suzuki
- Department of Chemistry, Tokyo Gakugei University, Tokyo, 184-8501, Japan
| | - Yui Konno
- Department of Chemistry, Tokyo Gakugei University, Tokyo, 184-8501, Japan
| | - Pei Zhao
- Research Center for Computational Science, Institute for Molecular Science, Okazaki, 444-8585, Japan.
| | - Nobuhiro Kikuchi
- Department of Chemistry, Tokyo Gakugei University, Tokyo, 184-8501, Japan
| | - Michio Yamada
- Department of Chemistry, Tokyo Gakugei University, Tokyo, 184-8501, Japan
| | - Masaya Mitsuishi
- Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Anh T N Dao
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai, 980-8577, Japan
- Graduate School of Engineering, Nagasaki University, Nagasaki, 852-8521, Japan
| | - Hitoshi Kasai
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai, 980-8577, Japan
| | - Masahiro Ehara
- Research Center for Computational Science, Institute for Molecular Science, Okazaki, 444-8585, Japan.
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3
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Konno Y, Morooka R, Morishita T, Zhao P, Miyasaka N, Ono K, Noda A, Uchida D, Iwasaki R, Yamada M, Ehara M, Maeda Y. Photoluminescence Properties of Single-Walled Carbon Nanotubes Influenced by the Tether Length of Reagents with Two Reactive Sites. Chemistry 2023:e202300766. [PMID: 36974909 DOI: 10.1002/chem.202300766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/25/2023] [Accepted: 03/27/2023] [Indexed: 03/29/2023]
Abstract
The functionalization of single-walled carbon nanotubes (SWNTs) is an effective method for controlling a local band gap, resulting in photoluminescence (PL) in the near-infrared region. Herein, SWNTs were functionalized using a series of bromoalkanes and dibromoalkanes to evaluate the effects of their length on the nanotube PL properties. When bromoalkanes (CnH2n+1Br) or dibromoalkanes (CnH2nBr2) with tether lengths of six or more were utilized for six different semiconducting SWNTs, the obtained SWNT adducts exhibited two new PL peaks, whereas dibromoalkanes with tether lengths of 3-5 (CnH2nBr2: n = 3-5) produced single peaks. Combined with theoretical calculations, the results suggested that the tether length of reagents changes the formation mechanism of functionalized adducts, that is, CnH2nBr2 (n = 3-5) tends to result in kinetic products.
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Affiliation(s)
- Yui Konno
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Rina Morooka
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Tatsunari Morishita
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Pei Zhao
- Institute for Molecular Science, Research Center for Computational Science, CHINA
| | - Naoto Miyasaka
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Kazuki Ono
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Akira Noda
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Daiki Uchida
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Ren Iwasaki
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Michio Yamada
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, JAPAN
| | - Masahiro Ehara
- Institute for Molecular Science, Research Center for Computational Science, JAPAN
| | - Yutaka Maeda
- Tokyo Gakugei University: Tokyo Gakugei Daigaku, Department of Chemistry, Nukuikitamachi 4-1-1, Koganei, 184-8501, Tokyo, JAPAN
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Kumar Pathak N, Konno Y, Kuan Ko Y, Maeda Y, Kobayashi T, Yabushita A, Kanseri B. Intermolecular vibrational energy transfer between SWCNTs with different chiralities. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111759] [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: 11/06/2022]
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Kambe D, Hikichi H, Tokumaru Y, Ohmichi M, Konno Y, Hino N. 0004 TS-142: A Novel and Potent Dual Orexin Receptor Antagonist with Sleep-Promoting Effects in Rats. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
The orexin system plays a pivotal role in regulating sleep and wakefulness, thus, orexin receptors (OX1 and OX2 receptors) have gained much attention as promising therapeutic targets for the treatment of insomnia. We synthesized a novel and potent dual orexin receptor antagonist (DORA), ORN0829 (investigation code name as TS-142), which was designed to have short-acting effects. Here we report pharmacological and pharmacokinetic profiles of ORN0829 in rats.
Methods
The antagonistic activities of ORN0829 were assessed using calcium mobilization assays. Ala-orexin A-induced [Ca2+]i response was measured with CHO-K1 cells stably expressing human/rat orexin receptor. Rats implanted the EEG/EMG electrodes were orally administrated ORN0829 at doses of 1, 3 or 10 mg/kg at the dark onset and sleep-wake stages were inspected visually. In addition, pharmacokinetic profiles of ORN0829 were investigated in rats.
Results
ORN0829 inhibited Ala-orexin A-increased [Ca2+]i response with a Kb of 0.67/0.44 nmol/L (for human/rat OX1 receptor), and with a Kb of 0.84/0.80 nmol/L (for human/rat OX2 receptor), respectively, indicating that ORN0829 is a potent DORA with no species differences. ORN0829 dose-dependently increased total sleep time and reduced sleep onset latency at doses of 1, 3 and 10 mg/kg. Importantly, the ORN0829 levels in plasma and cerebrospinal fluid rapidly reached a maximum concentration, and decreased with an elimination half-life of less than 1 h.
Conclusion
The present study indicates that ORN0829 is a novel and potent DORA with sleep-promoting effects, and that it exhibits ideal pharmacokinetic profiles (rapid absorption and short half-life) in rats. A phase 2a study of TS-142 using patients with insomnia has been completed, which is presented in a separate poster.
Support
Taisho Pharmaceutical. Co., Ltd.
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Affiliation(s)
- D Kambe
- Taisho Pharmaceutical Co., LTD., Tokyo, JAPAN
| | - H Hikichi
- Taisho Pharmaceutical Co., LTD., Tokyo, JAPAN
| | - Y Tokumaru
- Taisho Pharmaceutical Co., LTD., Tokyo, JAPAN
| | - M Ohmichi
- Taisho Pharmaceutical Co., LTD., Tokyo, JAPAN
| | - Y Konno
- Taisho Pharmaceutical Co., LTD., Tokyo, JAPAN
| | - N Hino
- Taisho Pharmaceutical Co., LTD., Tokyo, JAPAN
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Maeda Y, Konno Y, Nishino A, Yamada M, Okudaira S, Miyauchi Y, Matsuda K, Matsui J, Mitsuishi M, Suzuki M. Sonochemical reaction to control the near-infrared photoluminescence properties of single-walled carbon nanotubes. Nanoscale 2020; 12:6263-6270. [PMID: 32048703 DOI: 10.1039/d0nr00271b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The effect of ultrasonic irradiation on the optical properties of single-walled carbon nanotubes (SWNTs) was investigated. Upon sonication in D2O in the presence of sodium dodecylbenzene sulfonate (SDBS) under air, red-shifted photoluminescence (PL) peaks at ∼1043 and ∼1118 nm were observed from the aqueous suspensions of (6,4) and (6,5)SWNTs, accompanied by a decrease in the intensity of the intrinsic PL peaks. Upon sonication with SDBS under an Ar atmosphere, the rate of spectral change increased with the sonication time and new PL peaks emerged at 1043, 1118, and 1221 nm. Meanwhile, upon the addition of 1-butanol, the PL peaks emerged only at 1043 nm and 1118 nm, while the emergence of the peak at 1221 nm was inhibited. On the other hand, a suspension with highly dispersed SWNTs was obtained upon sonication in the presence of sodium cholate without any change in the intrinsic optical properties of SWNTs. These experimental results reveal that the PL characteristics of SWNTs can be controlled by controlling the sonication conditions such as the type of surfactant used, the concentration of SWNTs, reaction environment, and the presence of an inhibitor such as 1-butanol.
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Affiliation(s)
- Yutaka Maeda
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan.
| | - Yui Konno
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan.
| | - Akane Nishino
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan.
| | - Michio Yamada
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan.
| | - Saki Okudaira
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yuhei Miyauchi
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Kazunari Matsuda
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Jun Matsui
- Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
| | - Masaya Mitsuishi
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Mitsuaki Suzuki
- Department of Chemistry, Josai University, Sakado, Saitama 350-0295, Japan
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Maeda Y, Kuroda K, Tambo H, Murakoshi H, Konno Y, Yamada M, Zhao P, Zhao X, Nagase S, Ehara M. Influence of local strain caused by cycloaddition on the band gap control of functionalized single-walled carbon nanotubes. RSC Adv 2019; 9:13998-14003. [PMID: 35519309 PMCID: PMC9064015 DOI: 10.1039/c9ra02183c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/30/2019] [Indexed: 01/26/2023] Open
Abstract
Fine control of the band gap of single-walled carbon nanotubes (SWNTs) has been achieved by the functionalization with dibromoalkanes, namely, 1,3-dibromopropane (1a), 1,4-dibromobutane (1b), 1,5-dibromopentane (1c), and 1,8-bis(bromomethyl)naphthalene (1d). Red-shifted photoluminescence (PL) peaks observed at 1215–1242 nm were assigned to the local band gaps of the chemically functionalized SWNTs 2a, 2b, 2c, and 2d, respectively. Density functional theory (DFT) and time-dependent DFT calculations for 2a–2d suggest that “local strain” induced by cycloaddition plays an important role in tuning the local band gap energies of functionalized SWNTs. The local strain at the addition is cited as another factor controlling the emission wavelength of functionalized SWNTs.![]()
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Affiliation(s)
- Yutaka Maeda
- Department of Chemistry
- Tokyo Gakugei University
- Tokyo 184-8501
- Japan
| | - Kiyonori Kuroda
- Department of Chemistry
- Tokyo Gakugei University
- Tokyo 184-8501
- Japan
| | - Haruto Tambo
- Department of Chemistry
- Tokyo Gakugei University
- Tokyo 184-8501
- Japan
| | - Hiyori Murakoshi
- Department of Chemistry
- Tokyo Gakugei University
- Tokyo 184-8501
- Japan
| | - Yui Konno
- Department of Chemistry
- Tokyo Gakugei University
- Tokyo 184-8501
- Japan
| | - Michio Yamada
- Department of Chemistry
- Tokyo Gakugei University
- Tokyo 184-8501
- Japan
| | - Pei Zhao
- Research Center for Computational Science
- Institute for Molecular Science
- Okazaki
- Japan
| | - Xiang Zhao
- Institute for Chemical Physics
- Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment
- Xi'an Jiaotong University
| | - Shigeru Nagase
- Fukui Institute for Fundamental Chemistry (FIFC)
- Kyoto University
- Kyoto 606-8103
- Japan
| | - Masahiro Ehara
- Research Center for Computational Science
- Institute for Molecular Science
- Okazaki
- Japan
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8
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Maeda Y, Konno Y, Yamada M, Zhao P, Zhao X, Ehara M, Nagase S. Control of near infrared photoluminescence properties of single-walled carbon nanotubes by functionalization with dendrons. Nanoscale 2018; 10:23012-23017. [PMID: 30500038 DOI: 10.1039/c8nr07983h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Single-walled carbon nanotubes (SWNTs) were functionalized by reacting them with sodium naphthalenide and dendrons to control their photoemission in the near-IR region. The functionalized SWNTs were characterized by absorption, Raman, and photoluminescence (PL) spectroscopy. The degree of functionalization of the SWNTs decreased with the increasing bulkiness of the dendrons used. After functionalization, new red-shifted PL peaks could be observed at ∼1110 and ∼1210 nm where the intensities were drastically enhanced by the thermal treatment. The relative peak intensity of to that of increased with the increasing bulkiness of the dendrons. Density functional theory (DFT) calculations of the functionalized SWNTs with dendrons suggest that the adducts with less bulky hydroalkylated substitution are stable in Clar structures and the addition positions predominantly determine the PL peak positions.
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Affiliation(s)
- Yutaka Maeda
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan.
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9
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Konno Y, Suzuki K, Tanaka M, Shintani T, Gomi K. Chaperone complex formation of the transcription factor MalR involved in maltose utilization and amylolytic enzyme production in Aspergillus oryzae. Biosci Biotechnol Biochem 2018. [PMID: 29517411 DOI: 10.1080/09168451.2018.1447359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The Zn2Cys6-type transcription factor MalR controls the expression of maltose-utilizing (MAL) cluster genes and the production of amylolytic enzymes in Aspergillus oryzae. In the present study, we demonstrated that MalR formed a complex with Hsp70 and Hsp90 chaperones under non-inducing conditions similar to the yeast counterpart Mal63 and that the complex was released from the chaperone complex after the addition of the inducer maltose. The MalR protein was constitutively localized in the nucleus and mutation in both the putative nuclear localization signals (NLSs) located in the zinc finger motif and the C-terminal region resulted in the loss of nuclear localization. This result indicated the involvement of NSLs in the MalR nuclear localization. However, mutation in both NLSs did not affect the dissociation mode of the MalR-Hsp70/Hsp90 complex, suggesting that MalR activation induced by maltose can occur regardless of its intracellular localization.
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Affiliation(s)
- Yui Konno
- Laboratory of Bioindustrial Genomics, Department of Bioindustrial Informatics and Genomics, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Kuta Suzuki
- Laboratory of Bioindustrial Genomics, Department of Bioindustrial Informatics and Genomics, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Mizuki Tanaka
- Laboratory of Bioindustrial Genomics, Department of Bioindustrial Informatics and Genomics, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Takahiro Shintani
- Laboratory of Bioindustrial Genomics, Department of Bioindustrial Informatics and Genomics, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Katsuya Gomi
- Laboratory of Bioindustrial Genomics, Department of Bioindustrial Informatics and Genomics, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
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10
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Aleksić J, Ansoldi S, Antonelli LA, Antoranz P, Babic A, Bangale P, Barrio JA, González JB, Bednarek W, Bernardini E, Biasuzzi B, Biland A, Blanch O, Bonnefoy S, Bonnoli G, Borracci F, Bretz T, Carmona E, Carosi A, Colin P, Colombo E, Contreras JL, Cortina J, Covino S, Da Vela P, Dazzi F, De Angelis A, De Caneva G, De Lotto B, Wilhelmi EDO, Mendez CD, Prester DD, Dorner D, Doro M, Einecke S, Eisenacher D, Elsaesser D, Fonseca MV, Font L, Frantzen K, Fruck C, Galindo D, López RJG, Garczarczyk M, Terrats DG, Gaug M, Godinović N, Muñoz AG, Gozzini SR, Hadasch D, Hanabata Y, Hayashida M, Herrera J, Hildebrand D, Hose J, Hrupec D, Idec W, Kadenius V, Kellermann H, Kodani K, Konno Y, Krause J, Kubo H, Kushida J, La Barbera A, Lelas D, Lewandowska N, Lindfors E, Lombardi S, Longo F, López M, López-Coto R, López-Oramas A, Lorenz E, Lozano I, Makariev M, Mallot K, Maneva G, Mankuzhiyil N, Mannheim K, Maraschi L, Marcote B, Mariotti M, Martínez M, Mazin D, Menzel U, Miranda JM, Mirzoyan R, Moralejo A, Munar-Adrover P, Nakajima D, Niedzwiecki A, Nilsson K, Nishijima K, Noda K, Orito R, Overkemping A, Paiano S, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Persic M, Poutanen J, Moroni PGP, Prandini E, Puljak I, Reinthal R, Rhode W, Ribó M, Rico J, Garcia JR, Rügamer S, Saito T, Saito K, Satalecka K, Scalzotto V, Scapin V, Schultz C, Schweizer T, Shore SN, Sillanpää A, Sitarek J, Snidaric I, Sobczynska D, Spanier F, Stamatescu V, Stamerra A, Steinbring T, Storz J, Strzys M, Takalo L, Takami H, Tavecchio F, Temnikov P, Terzić T, Tescaro D, Teshima M, Thaele J, Tibolla O, Torres DF, Toyama T, Treves A, Uellenbeck M, Vogler P, Zanin R, Kadler M, Schulz R, Ros E, Bach U, Krauß F, Wilms J. Black hole lightning due to particle acceleration at subhorizon scales. Science 2014; 346:1080-4. [DOI: 10.1126/science.1256183] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- J. Aleksić
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - S. Ansoldi
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | - L. A. Antonelli
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - P. Antoranz
- Università di Siena and INFN Pisa, I-53100 Siena, Italy
| | - A. Babic
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | - P. Bangale
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | | | - J. Becerra González
- Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
- Present address: NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA, and Department of Physics and Department of Astronomy, University of Maryland, College Park, MD 20742, USA
| | | | - E. Bernardini
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - B. Biasuzzi
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | - A. Biland
- ETH Zurich, CH-8093 Zurich, Switzerland
| | - O. Blanch
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - S. Bonnefoy
- Universidad Complutense, E-28040 Madrid, Spain
| | - G. Bonnoli
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - F. Borracci
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - T. Bretz
- Universität Würzburg, D-97074 Würzburg, Germany
- Present address: Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - E. Carmona
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, E-28040 Madrid, Spain
| | - A. Carosi
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - P. Colin
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - E. Colombo
- Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
| | | | - J. Cortina
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - S. Covino
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - P. Da Vela
- Università di Siena and INFN Pisa, I-53100 Siena, Italy
| | - F. Dazzi
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - A. De Angelis
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | - G. De Caneva
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - B. De Lotto
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | | | - C. Delgado Mendez
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, E-28040 Madrid, Spain
| | - D. Dominis Prester
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | - D. Dorner
- Universität Würzburg, D-97074 Würzburg, Germany
| | - M. Doro
- Università di Padova and INFN, I-35131 Padova, Italy
| | - S. Einecke
- Technische Universität Dortmund, D-44221 Dortmund, Germany
| | | | | | | | - L. Font
- Unitat de Física de les Radiacions, Departament de Física, and Centro de Estudios e Investigación Espaciales-Institut d’Estudis Espacials de Catalunya, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - K. Frantzen
- Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - C. Fruck
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - D. Galindo
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - R. J. García López
- Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
| | - M. Garczarczyk
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - D. Garrido Terrats
- Unitat de Física de les Radiacions, Departament de Física, and Centro de Estudios e Investigación Espaciales-Institut d’Estudis Espacials de Catalunya, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - M. Gaug
- Unitat de Física de les Radiacions, Departament de Física, and Centro de Estudios e Investigación Espaciales-Institut d’Estudis Espacials de Catalunya, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - N. Godinović
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | - A. González Muñoz
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - S. R. Gozzini
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - D. Hadasch
- Institute of Space Sciences, E-08193 Barcelona, Spain
- Present address: Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria
| | - Y. Hanabata
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - M. Hayashida
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - J. Herrera
- Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
| | | | - J. Hose
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - D. Hrupec
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | - W. Idec
- University of Łódz', PL-90236 Lodz, Poland
| | - V. Kadenius
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
| | - H. Kellermann
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - K. Kodani
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - Y. Konno
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - J. Krause
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - H. Kubo
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - J. Kushida
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - A. La Barbera
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - D. Lelas
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | | | - E. Lindfors
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
- Present address: Finnish Centre for Astronomy with ESO (FINCA), Turku, Finland
| | - S. Lombardi
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - F. Longo
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | - M. López
- Universidad Complutense, E-28040 Madrid, Spain
| | - R. López-Coto
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - A. López-Oramas
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | | | - I. Lozano
- Universidad Complutense, E-28040 Madrid, Spain
| | - M. Makariev
- Institute for Nuclear Research and Nuclear Energy, BG-1784 Sofia, Bulgaria
| | - K. Mallot
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - G. Maneva
- Institute for Nuclear Research and Nuclear Energy, BG-1784 Sofia, Bulgaria
| | - N. Mankuzhiyil
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
- Present address: Astrophysics Science Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - K. Mannheim
- Universität Würzburg, D-97074 Würzburg, Germany
| | - L. Maraschi
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - B. Marcote
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - M. Mariotti
- Università di Padova and INFN, I-35131 Padova, Italy
| | - M. Martínez
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - D. Mazin
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - U. Menzel
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - J. M. Miranda
- Università di Siena and INFN Pisa, I-53100 Siena, Italy
| | - R. Mirzoyan
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - A. Moralejo
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - P. Munar-Adrover
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - D. Nakajima
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | | | - K. Nilsson
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
- Present address: Finnish Centre for Astronomy with ESO (FINCA), Turku, Finland
| | - K. Nishijima
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - K. Noda
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - R. Orito
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - A. Overkemping
- Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - S. Paiano
- Università di Padova and INFN, I-35131 Padova, Italy
| | - M. Palatiello
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | - D. Paneque
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - R. Paoletti
- Università di Siena and INFN Pisa, I-53100 Siena, Italy
| | - J. M. Paredes
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - X. Paredes-Fortuny
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - M. Persic
- Università di Udine and Istituto Nazionale di Fisica Nucleare (INFN) Trieste, I-33100 Udine, Italy, and Istituto Nazionale di Astrofisica (INAF)-Trieste, I-34127 Trieste, Italy
| | - J. Poutanen
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
| | | | | | - I. Puljak
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | - R. Reinthal
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
| | - W. Rhode
- Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - M. Ribó
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - J. Rico
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | | | - S. Rügamer
- Universität Würzburg, D-97074 Würzburg, Germany
| | - T. Saito
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - K. Saito
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | | | - V. Scalzotto
- Università di Padova and INFN, I-35131 Padova, Italy
| | - V. Scapin
- Universidad Complutense, E-28040 Madrid, Spain
| | - C. Schultz
- Università di Padova and INFN, I-35131 Padova, Italy
| | - T. Schweizer
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - S. N. Shore
- Università di Pisa and INFN Pisa, I-56126 Pisa, Italy
| | - A. Sillanpää
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
| | - J. Sitarek
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
| | - I. Snidaric
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | | | - F. Spanier
- Universität Würzburg, D-97074 Würzburg, Germany
| | - V. Stamatescu
- Institut de Física d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain
- Present address: School of Chemistry and Physics, University of Adelaide, Adelaide 5005, Australia
| | - A. Stamerra
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | | | - J. Storz
- Universität Würzburg, D-97074 Würzburg, Germany
| | - M. Strzys
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - L. Takalo
- Finnish MAGIC Consortium, Tuorla Observatory, University of Turku and Department of Physics, University of Oulu, Finland
| | - H. Takami
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - F. Tavecchio
- INAF National Institute for Astrophysics, I-00136 Rome, Italy
| | - P. Temnikov
- Institute for Nuclear Research and Nuclear Energy, BG-1784 Sofia, Bulgaria
| | - T. Terzić
- Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka and University of Split, HR-10000 Zagreb, Croatia
| | - D. Tescaro
- Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
| | - M. Teshima
- Max-Planck-Institut für Physik, D-80805 München, Germany
- Japanese MAGIC Consortium, Division of Physics and Astronomy, Kyoto University, Japan
| | - J. Thaele
- Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - O. Tibolla
- Universität Würzburg, D-97074 Würzburg, Germany
| | - D. F. Torres
- ICREA and Institute of Space Sciences, E-08193 Barcelona, Spain
| | - T. Toyama
- Max-Planck-Institut für Physik, D-80805 München, Germany
| | - A. Treves
- Università dell’Insubria and INFN Milano Bicocca, Como, I-22100 Como, Italy
| | - M. Uellenbeck
- Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - P. Vogler
- ETH Zurich, CH-8093 Zurich, Switzerland
| | - R. Zanin
- Universitat de Barcelona, Institut de Ciències del Cosmos, Institut d’Estudis Espacials de Catalunya-Universitat de Barcelona, E-08028 Barcelona, Spain
| | - M. Kadler
- Universität Würzburg, D-97074 Würzburg, Germany
| | - R. Schulz
- Universität Würzburg, D-97074 Würzburg, Germany
- Dr. Remeis-Sternwarte Bamberg, Astronomisches Institut der Universität Erlangen-Nürnberg, ECAP, D-96049 Bamberg, Germany
| | - E. Ros
- Max-Planck-Institut für Radioastronomie, D-53121 Bonn, Germany
- Observatori Astronòmic, Universitat de València, E-46980 Paterna, València, Spain
- Departament d’Astronomia i Astrofísica, Universitat de València, E-46100 Burjassot, València, Spain
| | - U. Bach
- Max-Planck-Institut für Radioastronomie, D-53121 Bonn, Germany
| | - F. Krauß
- Universität Würzburg, D-97074 Würzburg, Germany
- Dr. Remeis-Sternwarte Bamberg, Astronomisches Institut der Universität Erlangen-Nürnberg, ECAP, D-96049 Bamberg, Germany
| | - J. Wilms
- Dr. Remeis-Sternwarte Bamberg, Astronomisches Institut der Universität Erlangen-Nürnberg, ECAP, D-96049 Bamberg, Germany
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Ueki S, Nishikawa J, Yamauchi Y, Konno Y, Tamaki M, Itoga M, Kobayashi Y, Takeda M, Moritoki Y, Ito W, Chihara J. Retinoic acids up-regulate functional eosinophil-driving receptor CCR3. Allergy 2013; 68:953-6. [PMID: 23742077 DOI: 10.1111/all.12175] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2013] [Indexed: 01/21/2023]
Abstract
Eotaxins and their receptor CCR3 have a definitive role for tissue accumulation of eosinophils both under homeostatic and pathologic conditions. However, physiological stimuli that can up-regulate CCR3 in blood-derived human eosinophils have not been recognized. As a prior gene microarray study revealed up-regulation of CCR3 in eosinophils stimulated with retinoic acids (RAs), the expression of functional CCR3 was examined. We found that 9-cis RA and all-trans RA (ATRA) significantly induced surface CCR3 expression regardless of the presence of IL-3 or IL-5. Pharmacological manipulations with receptor-specific agonists and antagonists indicated that retinoic acid receptor-α activation is critical for CCR3 up-regulation. RA-induced CCR3 was associated with its functional capacity, in terms of the calcium mobilization and chemotactic response to eotaxin-1 (CCL11). Our study suggests an important role of vitamin A derivatives in the tissue accumulation of eosinophils.
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Affiliation(s)
- S. Ueki
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - J. Nishikawa
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - Y. Yamauchi
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - Y. Konno
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - M. Tamaki
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - M. Itoga
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - Y. Kobayashi
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - M. Takeda
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - Y. Moritoki
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - W. Ito
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
| | - J. Chihara
- Department of Infection, Allergy, Clinical Immunology and Laboratory Medicine; Akita University Graduate School of Medicine; Akita; Japan
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12
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Konno Y, Tsuji E, Skeldon P, Thompson GE, Habazaki H. Factors influencing the growth behaviour of nanoporous anodic films on iron under galvanostatic anodizing. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1833-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Kure K, Konno Y, Tsuji E, Skeldon P, Thompson G, Habazaki H. Formation of self-organized nanoporous anodic films on Type 304 stainless steel. Electrochem commun 2012. [DOI: 10.1016/j.elecom.2012.05.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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14
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Konno Y, Kudo T, Sakai S. Ab initio MO and DFT study for the isomerisation of bicyclo[1.1.0]tetrasilane and the germanium analogues. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-1001-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Sudo S, Konno Y, Odagiri T, Kato T, Hosaka M, Takeda M, Watari H, Kaneuchi M, Sakuragi N. Exploration of biomarkers for lymph node metastasis in patients with endometrial cancer using exon-expression microarray. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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16
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Cagide E, Louzao MC, Espiña B, Ares IR, Vieytes MR, Sasaki M, Fuwa H, Tsukano C, Konno Y, Yotsu-Yamashita M, Paquette LA, Yasumoto T, Botana LM. Comparative cytotoxicity of gambierol versus other marine neurotoxins. Chem Res Toxicol 2011; 24:835-42. [PMID: 21517028 DOI: 10.1021/tx200038j] [Citation(s) in RCA: 9] [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: 11/29/2022]
Abstract
Many microalgae produce compounds that exhibit potent biological activities. Ingestion of marine organisms contaminated with those toxins results in seafood poisonings. In many cases, the lack of toxic material turns out to be an obstacle to make the toxicological investigations needed. In this study, we evaluate the cytotoxicity of several marine toxins on neuroblastoma cells, focusing on gambierol and its effect on cytosolic calcium levels. In addition, we compared the effects of this toxin with ciguatoxin, brevetoxin, and gymnocin-A, with which gambierol shares a similar ladder-like backbone, as well as with polycavernoside A analogue 5, a glycosidic macrolide toxin. For this purpose, different fluorescent dyes were used: Fura-2 to monitor variations in cytosolic calcium levels, Alamar Blue to detect cytotoxicity, and Oregon Green 514 Phalloidin to quantify and visualize modifications in the actin cytoskeleton. Data showed that, while gambierol and ciguatoxin were successful in producing a calcium influx in neuroblastoma cells, gymnocin-A was unable to modify this parameter. Nevertheless, none of the toxins induced morphological changes or alterations in the actin assembly. Although polycavernoside A analogue 5 evoked a sharp reduction of the cellular metabolism of neuroblastoma cells, gambierol scarcely reduced it, and ciguatoxin, brevetoxin, and gymnocin-A failed to produce any signs of cytotoxicity. According to this, sharing a similar polycyclic ether backbone is not enough to produce the same effects on neuroblastoma cells; therefore, more studies should be carried out with these toxins, whose effects may be being underestimated.
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Affiliation(s)
- E Cagide
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Campus de Lugo, 27002 Lugo, Spain
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Ozawa Y, Konno Y, Naito N. Abstracts: Ultra low viscosity emulsion with high tolerance for electrolytes. Int J Cosmet Sci 2010. [DOI: 10.1111/j.1468-2494.2010.00605_4.x] [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]
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18
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Mineshima M, Konno Y, Eguchi K, Kaneko I. 9 Effect of temperature on separation characteristics in a plasma fractionator. Transfus Apher Sci 2010. [DOI: 10.1016/s1473-0502(10)70035-5] [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: 11/16/2022]
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Alonso E, Vale C, Sasaki M, Fuwa H, Konno Y, Perez S, Vieytes MR, Botana LM. Calcium oscillations induced by gambierol in cerebellar granule cells. J Cell Biochem 2010; 110:497-508. [PMID: 20336695 DOI: 10.1002/jcb.22566] [Citation(s) in RCA: 3] [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: 11/06/2022]
Abstract
Gambierol is a marine polyether ladder toxin derived from the dinoflagellate Gambierdiscus toxicus. To date, gambierol has been reported to act either as a partial agonist or as an antagonist of sodium channels or as a blocker of voltage-dependent potassium channels. In this work, we examined the cellular effect of gambierol on cytosolic calcium concentration, membrane potential and sodium and potassium membrane currents in primary cultures of cerebellar granule cells. We found that at concentrations ranging from 0.1 to 30 microM, gambierol-evoked [Ca(2+)]c oscillations that were dependent on the presence of extracellular calcium, irreversible and highly synchronous. Gambierol-evoked [Ca(2+)]c oscillations were completely eliminated by the NMDA receptor antagonist APV and by riluzole and delayed by CNQX. In addition, the K(+) channel blocker 4-aminopyridine (4-AP)-evoked cytosolic calcium oscillations in this neuronal system that were blocked by APV and delayed in the presence of CNQX. Electrophysiological recordings indicated that gambierol caused membrane potential oscillations, decreased inward sodium current amplitude and decreased also outward IA and IK current amplitude. The results presented here point to a common mechanism of action for gambierol and 4-AP and indicate that gambierol-induced oscillations in cerebellar neurons are most likely secondary to a blocking action of the toxin on voltage-dependent potassium channels and hyperpolarization of sodium current activation.
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Affiliation(s)
- E Alonso
- Facultad de Veterinaria, Departamento de Farmacología, Universidad de Santiago de Compostela, Lugo, Spain
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Abstract
1. Nicardipine (Nic) or nifedipine (Nif) was given to male and female C57BL/6J mice by a single gavage at doses of 100, 200 and 400 micromolkg(-1), and changes in the levels of mRNA and apoprotein of hepatic cytochrome P450 (P450) enzymes, including Cyp2b9, Cyp2b10, Cyp3a11 and Cyp3a41, were examined by reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blotting, respectively. Furthermore, hepatic microsomal activities for pentoxyresorufin O-dealkylation (PROD) and nifedipine oxidation, which are mainly mediated by Cyp2b and Cyp3a subfamily enzymes, respectively, were measured. 2. Results from RT-PCR analysis revealed that Nic, but not Nif, showed a capacity for activating the Cyp3a11 gene in either sex of mice and that both chemicals could induce a male-selective activation of Cyp2b10 gene, although they had no capacity for activating the Cyp2b9 and Cyp3a41 genes in either sex. 3. Increased levels of the mRNAs of Cyp2b10 and Cyp3a11 were closely correlated with those of apoprotein and activity of the corresponding P450 subfamily enzymes. 4. The study demonstrated for the first time that Nic, but not Nif, showed the ability to induce Cyp3a11 in both sexes of mice, although both Nif and Nic led to a male-selective induction of Cyp2b10, and that Nic and Nif had no ability to induce Cyp2b9 and Cyp3a41 in either sex.
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Affiliation(s)
- Y Konno
- Department of Molecular Toxicology and COE Program in the 21st Century, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
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Konno Y, Okajima K, Ishizuka D, Ueki H. MO-D-330A-06: Development of the X-Ray Detector with Sequential Readout Circuits for Multidetector-Row Computed Tomography. Med Phys 2006. [DOI: 10.1118/1.2241408] [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: 11/07/2022] Open
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Konno Y, Nemoto K, Degawa M. Induction of hepatic cytochrome P450s responsible for the metabolism of xenobiotics by nicardipine and other calcium channel antagonists in the male rat. Xenobiotica 2003; 33:119-29. [PMID: 12623755 DOI: 10.1080/0049825021000023987] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
1. The effects of nicardipine and three other calcium channel antagonists, nifedipine, diltiazem and verapamil, on hepatic gene expression of cytochrome P450s (P450), CYP1A1, CYP1A2, CYP2B1, CYP2B2, CYP3A1 and CYP3A2 in male rats were examined by an RT-PCR method. 2. Treatment of rats with nicardipine resulted in a significant increase in hepatic expression of all the P450 genes examined. Other calcium channel antagonists, nifedipine, diltiazem and verapamil, also enhanced the gene expression of CYP2B1, CYP2B2, CYP3A1 and CYP3A2, although these showed no capacity for activating CYP1A1 and CYP1A2 genes. 3. We have demonstrated for the first time that nicardipine activated not only the genes of CYP2B1, CYP2B2, CYP3A1 and CYP3A2, but also those of CYP1A1 and CYP1A2 in the rat liver and have further suggested that calcium channel antagonists may show a common capacity for activating the genes of CYP2B1, CYP2B2, CYP3A1 and CYP3A2. Furthermore, this increased expression of P450 genes was demonstrated to contribute to increase in the protein level of the corresponding P450s.
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Affiliation(s)
- Y Konno
- Department of Molecular Toxicology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
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Konno Y, Sato T, Suzuki K, Matsumoto M, Sasaki T, Kodama N. Sequential changes of oxyhemoglobin in drained fluid of cisternal irrigation therapy--reference to the effect of ascorbic acid. Acta Neurochir Suppl 2002; 77:167-9. [PMID: 11563278 DOI: 10.1007/978-3-7091-6232-3_35] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- Y Konno
- Department of Neurosurgery, Fukushima Medical School, Fukushima, Japan
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Kodama N, Matsumoto M, Sasaki T, Konno Y, Sato T. Cisternal irrigation therapy with urokinase and ascorbic acid for prevention of vasospasm. Acta Neurochir Suppl 2002; 77:171-4. [PMID: 11563280 DOI: 10.1007/978-3-7091-6232-3_36] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- N Kodama
- Department of Neurosurgery, Fukushima Medical School, Fukushima, Japan
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25
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Fukushima H, Kato S, Kaiya T, Yuguchi T, Ohara K, Noma H, Konno Y, Kameyama K, Oshika T. Effect of subconjunctival steroid injection on intraocular inflammation and blood glucose level after cataract surgery in diabetic patients. J Cataract Refract Surg 2001; 27:1386-91. [PMID: 11566520 DOI: 10.1016/s0886-3350(01)00783-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE To prospectively evaluate the usefulness of a subconjunctival steroid injection given at the completion of cataract surgery in patients with diabetes mellitus. SETTING University of Tokyo School of Medicine, Tokyo, Kaiya Eye Clinic, Hamamatsu, and Jyosai Hospital, Tokyo, Japan. METHODS One hundred four eyes of 104 diabetic patients having routine small incision cataract surgery were randomized into 2 groups. One group received a subconjunctival injection of dexamethasone and the other group did not. Aqueous flare intensity was measured with the laser flare meter preoperatively and 1, 2, 5, 7, and 14 days postoperatively. Another 19 diabetic patients having routine cataract surgery were randomized to receive a subconjunctival steroid injection or not; blood glucose concentration was measured 4 times a day for 3 days postoperatively. RESULTS There was no significant difference between the 2 groups in aqueous flare values at any postoperative time. The subconjunctival steroid injection induced a transient but significant increase in blood glucose on the day of surgery. CONCLUSION A subconjunctival steroid injection given at the completion of cataract surgery in diabetic patients had no beneficial effects.
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Affiliation(s)
- H Fukushima
- Department of Ophthalmology, University of Tokyo School of Medicine, Tokyo, Japan.
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Nemoto J, Sasaki T, Kikuchi Y, Konno Y, Sakuma J, Kodama N. Spinal evoked potentials following transcranial magnetic stimulation. Fukushima J Med Sci 2001; 47:21-32. [PMID: 11764415 DOI: 10.5387/fms.47.21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Motor evoked potentials by magnetic stimulation is less invasive and causes no pain as opposed to high current electric stimulation. However, the distribution of the magnetic field generated by the round coil has not been fully studied. In this report, we mapped the extent of the magnetic induction flux density, and then the evoked potentials from the spinal cord were investigated by transcranial magnetic stimulation. We also examined the origin of the evoked potentials obtained by the magnetic stimulation. The following results were obtained. The magnetic induction flux density was at its maximum at the edge of the coil. The potentials consisted of a first negative wave and subsequent multiphasic waves. The first negative wave was similar to a response of the subcorticospinal tract in the lower brain stem, while the subsequent multiphasic waves were similar to those of the pyramidal tract. Although magnetic stimulation has certain advantages over electric stimulation, several problems remain to be solved for the monitoring of motor functions in the clinical settings.
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Affiliation(s)
- J Nemoto
- Department of Neurosurgery, Fukushima Medical University School of Medicine, Fukushima City, Japan
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Fukuda K, Saeki N, Mine S, Oga M, Yamaura A, Yuza J, Nagata H, Numata T, Konno Y. Evaluation of outcome and QOL in patients with craniofacial resection for malignant tumors involving the anterior skull base. Neurol Res 2000; 22:545-50. [PMID: 11045013 DOI: 10.1080/01616412.2000.11740716] [Citation(s) in RCA: 34] [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: 10/21/2022]
Abstract
The purpose of this study was to retrospectively evaluate the effectiveness of anterior craniofacial resection in the treatment of nasal and paranasal malignant tumors involving anterior skull base. Between 1992 and 1998, 13 patients with nasal or paranasal malignant tumors underwent this surgical procedure. The site and time of metastasis or recurrence, and survival outcome were retrospectively surveyed. Current status of long-surviving patients and their subjective assessment of the surgical treatment were also evaluated through questionnaires. Median follow-up period was 52 months. Nine patients (69%) were alive with no evidence of disease. Of these patients, eight had survived for more than three years. Recurrence or metastasis occurred in four patients (31%). The mean time interval between surgery and recurrence or metastasis was 11 months. According to the results of questionnaires to long-surviving patients, 89% patients had some complaints. In particular, complaints of unsightly appearance were manifested by all these patients. When the patients themselves evaluated their current conditions resulting from this surgical treatment, 63% were dissatisfied. These results suggest that this surgical treatment is valid for selected patients in regard to survival outcome. When the effectiveness of this treatment is evaluated, however, psychological and functional issues should not be taken lightly.
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Affiliation(s)
- K Fukuda
- Department of Neurological Surgery, Chiba University, School of Medicine, Japan
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28
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Sugita K, Taki T, Hayashi Y, Shimaoka H, Kumazaki H, Inoue H, Konno Y, Taniwaki M, Kurosawa H, Eguchi M. MLL-CBP fusion transcript in a therapy-related acute myeloid leukemia with the t(11;16)(q23;p13) which developed in an acute lymphoblastic leukemia patient with Fanconi anemia. Genes Chromosomes Cancer 2000; 27:264-9. [PMID: 10679915] [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: 02/15/2023] Open
Abstract
We describe a boy with Fanconi anemia (FA) who developed acute lymphoblastic leukemia (ALL) (FAB-LI) followed by acute myeloid leukemia (AML) (FAB-M5) at relapse. The patient was diagnosed with early pre-B-cell ALL without preceding aplastic anemia and was treated with ALL-oriented chemotherapy which included doxorubicin (a total dose of 140 mg/m(2) administered), which is a topoisomerase II inhibitor. Complete remission was obtained, but after 38 weeks AML developed. The karyotype of ALL cells at diagnosis showed 46,XY, and that of AML cells at relapse was 46,XY, t(11;16)(q23;p13). An MLL gene rearrangement and MLL-CBP chimeric mRNA were found in AML, but not in ALL. A diagnosis of FA was confirmed by an increased number of chromosomal breaks and rearrangements in peripheral blood lymphocytes cultured with mitogen in the presence of mitomycin C. We conclude that this FA patient developed ALL followed by a therapy-related t(11;16)-AML resulting in an MLL-CBP fusion. Further examination of such patients would shed light on leukemogenesis in FA patients. Genes Chromosomes Cancer 27:264-269, 2000.
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Affiliation(s)
- K Sugita
- Division of Hematology, Department of Pediatrics, Dokkyo University School of Medicine, Tochigi, Japan.
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Shinoda T, Kagatani S, Maeda A, Konno Y, Hashimoto H, Hara K, Fujita K, Sonobe T. Sugar-branched-cyclodextrins as injectable drug carriers in mice. Drug Dev Ind Pharm 1999; 25:1185-92. [PMID: 10596356 DOI: 10.1081/ddc-100102286] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The purpose of this study was to investigate stable complexation of drug in blood by sugar-branched-beta-cyclodextrins (beta-CDs) such as glucose (glu)- or galactose (gal)-branched-beta-CDs and the pharmacokinetic disposition of drug in sugar-branched-beta-CD complex. Complexation of steroidal drugs in sugar-branched-beta-CDs and their replacement by cholesterol were measured. The complexes of dexamethasone/glucosyl-beta-CDs (dexamethasone/glu-beta-CD or dexamethasone/glu-glu-beta-CD) were not replaced by cholesterol, which is a representative endogenous compound, whereas the complex of dexamethasone/beta-CD was replaced by cholesterol. The same results were obtained in steroidal drugs such as hydrocortisone, triamcinolone, and prednisolone. Thus, the use of glu-beta-CD and glu-glu-beta-CD permitted the stable complexation of the drug in water. Stability constants of dexamethasone/glu-glu-beta-CD and dexamethasone/gal-glu-beta-CD complexes are the same, which means that the sugar moiety of the side chain in beta-CD has little effect on stability constants. After the dexamethasone/gal-glu-beta-CD complex or the dexamethasone/glu-glu-beta-CD complex (dexamethasone: 1 mg/body) was administered intravenously to mice, dexamethasone concentrations in liver tissue and blood were measured. The dexamethasone/gal-glu-beta-CD complex (66.1 +/- 1.7 micrograms as dexamethasone/gram of liver tissue) was distributed to liver tissue significantly more than the dexamethasone/glu-glu-beta-CD (beta-CD) complex (59.9 +/- 1.0 micrograms as dexamethasone/gram of liver) at 30 min after administration (p < .05). Sugar-branched-beta-CD gave a water-soluble and stable complex for dexamethasone and changed the disposition of dexamethasone. Sugar-branched-beta-CDs are potentially excellent carriers for a steroidal injectable formulation.
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Affiliation(s)
- T Shinoda
- Novel Pharmaceutical Laboratories, Yamanouchi Pharmaceutical Company, Limited, Shizuoka, Japan.
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30
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Tsuda H, Sekine K, Uehara N, Takasuka N, Moore MA, Konno Y, Nakashita K, Degawa M. Heterocyclic amine mixture carcinogenesis and its enhancement by caffeine in F344 rats. Cancer Lett 1999; 143:229-34. [PMID: 10503909 DOI: 10.1016/s0304-3835(99)00130-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In order to elucidate whether mixed exposure to environmental carcinogens and caffeine increases the risk of cancer induction, we investigated the relationship between preneoplastic lesion development in the liver and colon and drug metabolizing enzyme induction and DNA adduct formation, in rats treated with a mixture of heterocyclic amines (HCAs) and caffeine. In Experiment 1, male F344 rats were administered 3 different HCAs, the food carcinogens, 2-amino-3-methylimidazo[4,5-f]quinoline (IQ), 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), and 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), alone or in combinations of 2 or 3 at 50 ppm in the diet for 16 weeks. The numbers of hepatic glutathione-S-transferase P form positive (GST-P+) foci and colonic aberrant crypt foci (ACF) were greater in the IQ + MeIQx group than expected from simple summation and increased levels of HCA-DNA adducts were noted. However, no summation was obtained when combined with PhIP, which rather caused inhibition. In Experiment 2, the effects of concurrent caffeine administration on the PhIP carcinogenicity were assessed. Caffeine at 1000 and 500 ppm in the drinking water for 2 weeks significantly increased levels of CYP1A2. Ten weeks concurrent administration of caffeine (1000 ppm) and PhIP (400 ppm) resulted in significant increase of colon ACFs and CYP1A2 expression. Thus, concurrent administration of IQ and MeIQx caused elevation of their carcinogenicity but other mixtures with PhIP did not enhance carcinogenicity. However, a non-carcinogen, caffeine, enhanced PhIP colon carcinogenesis, possibly due to induction of CYP1A2.
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Affiliation(s)
- H Tsuda
- Experimental Pathology and Chemotherapy Division, National Cancer Center Research Institute, Tokyo, Japan
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31
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Kikuchi T, Kato K, Ohara S, Sekine H, Arikawa T, Suzuki T, Konno Y, Noguchi K, Saito M, Saito Y, Simosegawa T, Toyota T. [The expression of chemokines and the dynamics of inflammatory cell infiltration before and after H. pylori eradication]. Nihon Shokakibyo Gakkai Zasshi 1999; 96:933-40. [PMID: 10481481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
We attempted to evaluate the relationship between the expression of IL-8 and RANTES and the dynamics of their target cells in human gastric mucosa of H. pylori associated gastritis, including their changes after H. pylori eradication. We performed the measurement of the mucosal level of IL-8 and RANTES protein by ELISA and immunohistochemistry. The neutrophil infiltration into the gastric mucosa was identified by the histological examination based on the Updated Sydney system and the measurement of MPO activity. The memory T lymphocyte and eosinophil were indicated by immunohistochemistry of CD45RO that is one of surface markers indicating memory T lymphocytes and MBP that is contained in the granules of eosinophils. H. pylori positive gastric mucosa demonstrated a remarkable increase in neutrophils. CD45RO positive cells and eosinophils, compared to H. pylori negative gastric mucosa. Gastric mucosal level of IL-8 and RANTES protein and MPO activity was significantly higher in H. pylori positive cases than that in H. pylori negative controls after H. pylori eradication, both of the level of IL-8 protein and MPO activity reduced at the same levels as negative controls. However, RANTES expression, CD45RO positive T lymphocytes and eosinophils remained in H. pylori eradicated gastric mucosa at the significantly high level, compared with H. pylori negative cases. Therefore, it seems possible that IL-8 might enhance the inflammation by facilitating the neutrophil infiltration into H. pylori infected gastric mucosa and that RANTES might play an important role in the specific immune response against H. pylori and the maintenance of the immune memory after H. pylori eradication.
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Affiliation(s)
- T Kikuchi
- Department of Gastroenterology, Iwaki Kyouritu General Hospital
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Konno Y, Numaga J, Tsuchiya N, Ogawa A, Islam SM, Mochizuki M, Mitsui H, Oda H, Maeda H. HLA-B27 subtypes and HLA class II alleles in Japanese patients with anterior uveitis. Invest Ophthalmol Vis Sci 1999; 40:1838-44. [PMID: 10393058] [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: 02/13/2023] Open
Abstract
PURPOSE Some patients with anterior uveitis (AU) have ankylosing spondylitis (AS) and are HLA-B27 class I-positive. The purpose of this study was to investigate whether there are differences in HLA at the allele level among each group of patients with AU. METHODS Seventy-three patients with AU were studied. They were classified into three groups: 31 with AS-associated AU, 14 with HLA-B27-associated AU, and 28 with idiopathic AU. Three control groups without AU were used: 138 random subjects, 33 HLA-B27-positive healthy subjects, and 19 HLA-B27-positive patients with AS. DRB1 and DQB1 genotyping was performed using polymerase chain reaction (PCR)-single-strand conformation polymorphism (PCR-SSCP) and PCR-restriction fragment length polymorphism. HLA-B27 subtype was determined by PCR-SSCP. RESULTS There was no difference in the frequency of any class I antigen except HLA-B27 among the patients studied. The frequencies of HLA-DR12 in AS-associated AU and HLA-DR1 in HLA-B27-associated AU showed an increase. In HLA-B27-associated AU, DRB1*0101 and DQB1*0501 were increased compared with HLA-B27-positive control subjects. When HLA-B27 subtype distribution was compared among the groups, the proportion of B*2704 was significantly lower in HLA-B27-associated AU (P = 0.037), however, such a difference was not present in AS-associated groups. CONCLUSIONS These results indicated that B*2704 seemed to be less susceptible to AU compared with B*2705 in Japanese subjects. The increase of HLA-DR12 and HLA-DR1 in AU may be caused by linkage disequilibrium with B*2704 and B*2705, respectively.
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Affiliation(s)
- Y Konno
- Department of Ophthalmology, Faculty of Medicine, University of Tokyo, Japan
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Abstract
KB tumor cells exhibit an increased number of folate receptors on their membrane. This receptor has been proposed as a promising target for tumor drug targeting. Therefore, the disposition of folate-conjugated bovine serum albumin (folate-BSA) was examined as a model system for drug targeting. Nude mice which had received KB tumor cell transplants were given bolus intravenous administration of either 111In-labeled folate-BSA (111In-folate-BSA; 1 mg/kg) or unmodified 111In-BSA (111In-BSA; 1 mg/kg). The disposition characteristics and pharmacokinetics of 111In-folate-BSA were compared with those of the 111In-BSA as a control. The half-life of the beta-phase of 111ln-folate-BSA in plasma was 140 min. The tumor uptake rate index for 111In-folate-BSA was 0.46 microL/min/g, and that for 111In-BSA was 0.32 microL/min/g. This index of 111In-folate-BSA was slightly higher than that of 111In-BSA in vivo, by a factor of 1.4. In vivo experiments showed folate-BSA has a relatively long plasma duration. 111In-folate-BSA also showed selective distribution to tumors, but not as great as recent results from in vitro experiments. Therefore, the low vascular permeability of BSA into solid tumor tissue and inhibition of folate-mediated 111In-folate-BSA uptake by tumor cells from the blood may be the rate-limiting factor of distribution.
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Affiliation(s)
- T Shinoda
- Novel Pharmaceutical Research Laboratories, Yamanouchi Pharmaceutical Co. Ltd, Shizuoka, Japan.
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Konno Y, Numaga J, Mochizuki M, Mitsui H, Hirata R, Maeda H. TAP polymorphism is not associated with ankylosing spondylitis and complications with acute anterior uveitis in HLA-B27-positive Japanese. Tissue Antigens 1998; 52:478-83. [PMID: 9864038 DOI: 10.1111/j.1399-0039.1998.tb03075.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
HLA-B27 is associated with the etiology of ankylosing spondylitis (AS) and acute anterior uveitis (AAU). Transporter associated with antigen processing (TAP) 1 and TAP2 polymorphism influences the range of peptide presented by HLA class I molecules. In this report, contribution of TAP polymorphism to the susceptibility to AS and AAU was studied in HLA-B27-positive Japanese individuals. Patients were classified into three groups: 16 AS patients, 14 AAU patients and 22 patients with both AS and AAU. Twelve HLA-B27-positive healthy individuals were included as a control. TAP polymorphism was detected by PCR-RFLP methods. Significant differences in frequencies of TAP1 alleles were not found between patient groups. None of the TAP2 frequencies showed increased or decreased frequencies compared with HLA-B27-positive healthy controls. In comparison with a random Japanese control, TAP2D allele frequency was significantly increased in the AAU group, but failed to reach a significant level in a group consisting of the AAU-only patients and the patients with both AS and AAU. All of the patient groups were noted to have a significantly increased prevalence of the TAP2H allele as compared to random controls; however, the higher frequency of this allele was detected in HLA-B27 healthy controls as well. These observations suggest a linkage disequilibrium between TAP2D, TAP2H and HLA-B27 in Japanese.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 2
- ATP Binding Cassette Transporter, Subfamily B, Member 3
- ATP-Binding Cassette Transporters/genetics
- Acute Disease
- HLA-B27 Antigen/genetics
- Humans
- Japan
- Major Histocompatibility Complex
- Polymorphism, Genetic
- Spondylitis, Ankylosing/complications
- Spondylitis, Ankylosing/genetics
- Spondylitis, Ankylosing/immunology
- Uveitis, Anterior/complications
- Uveitis, Anterior/genetics
- Uveitis, Anterior/immunology
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Affiliation(s)
- Y Konno
- Department of Ophthalmology, School of Medicine, University of Tokyo, Japan
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Oba S, Kimura K, Suzuki N, Mise N, Tojo A, Miyashita K, Konno Y, Hirata Y, Goto A, Omata M. Relevance of periglomerular myofibroblasts in progression of human glomerulonephritis. Am J Kidney Dis 1998; 32:419-25. [PMID: 9740158 DOI: 10.1053/ajkd.1998.v32.pm9740158] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To clarify the pathological and clinical significance of periglomerular alpha-smooth muscle actin (alpha-SMA)-positive cells, we examined 51 needle-biopsy specimens from patients with human glomerulonephritis. Immunoelectron microscopy confirmed these cells were myofibroblasts showing characteristic features with abundant alpha-SMA-positive thin myofilaments. Nonsclerotic glomeruli with periglomerular myofibroblasts were larger in the Bowman's capsular planar area than nonsclerotic glomeruli without periglomerular myofibroblasts (24.7 +/- 6.0 x 10(3) microm2 v 19.9 +/- 8.5 x 10(3) microm2; P < 0.01). We studied the correlation between the clinical prognosis and the extent of periglomerular myofibroblasts in 24 patients with IgA nephropathy. Patients were divided into two groups; those with plasma creatinine levels within normal range at biopsy and significantly elevated at follow-up were designated group 1 (poor prognosis), and patients with plasma creatinine levels within normal range at biopsy and not significantly elevated at follow-up were designated group 2 (fair prognosis). In the kidneys of group 1 patients, periglomerular alpha-SMA was expressed more intensively than it was in the kidneys of group 2 patients (alpha-SMA expression score, 1.0 +/- 0.48 v 0.52 +/- 0.54; P < 0.05). These findings indicate that periglomerular myofibroblasts appeared surrounding the nonsclerotic hypertrophic glomeruli, which may lead finally to glomerulosclerosis. This report suggests that interaction between the glomerular cells and the periglomerular myofibroblasts may have a role in the progression of glomerular diseases.
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Affiliation(s)
- S Oba
- The Second Department of Internal Medicine, Faculty of Medicine, the University of Tokyo, Japan
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Iwata H, Fujita K, Kushida H, Suzuki A, Konno Y, Nakamura K, Fujino A, Kamataki T. High catalytic activity of human cytochrome P450 co-expressed with human NADPH-cytochrome P450 reductase in Escherichia coli. Biochem Pharmacol 1998; 55:1315-25. [PMID: 9719488 DOI: 10.1016/s0006-2952(97)00643-6] [Citation(s) in RCA: 124] [Impact Index Per Article: 4.8] [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: 02/08/2023]
Abstract
Forms of human cytochrome P450 (P450 or CYP), such as CYP1A1, CYP1A2, CYP2A6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A4, were expressed or co-expressed together with human NADPH-P450 reductase in Escherichia coli. When P450 was expressed alone in E. coli, the expression level of holo-P450 ranged from 310 to 1620 nmol/L of culture. The expression level of holo-P450 decreased by co-expression with the reductase, and the level ranged from 66 to 381 nmol/L of culture. The expression level of the reductase varied depending on the forms of P450 co-expressed, and ranged from 204 to 937 U/L of culture. We assayed the catalytic activity of P450 using E. coli cells disrupted by freeze-thaw. When co-expressed with the reductase, human P450 catalyzed the oxidation of representative substrates at efficient rates. The rates appeared comparable to the reported activities of P450 in a reconstituted system containing purified preparations of P450 and the reductase.
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Affiliation(s)
- H Iwata
- Division of Drug Metabolism, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
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Koike T, Ohara S, Sekine H, Iijima K, Moriyama S, Katoh K, Honda K, Kitagawa M, Konno Y, Noguchi K, Asaki S, Toyota T. [A case of reflux esophagitis after eradication of Helicobacter pylori]. Nihon Shokakibyo Gakkai Zasshi 1998; 95:317-20. [PMID: 9591407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- T Koike
- Third Department of Internal Medicine, Tohoku University School of Medicine
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Abedin KS, Haidar S, Konno Y, Takyu C, Ito H. Difference Frequency Generation of 5-18 mum in a AgGaSe(2) Crystal. Appl Opt 1998; 37:1642-1646. [PMID: 18268761 DOI: 10.1364/ao.37.001642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Mid-infrared radiation in the 5-18-mum range has been obtained by difference frequency generation in a AgGaSe(2) crystal by pumping with the output of a type I LiNbO(3) optical parametric oscillator (OPO). Here we suggest the use of a LiTaO(3) retarder to achieve an orthogonal state of polarization between OPO outputs that are necessary for efficient pumping of a AgGaSe(2) crystal. Several tens of kilowatts of peak power near 8 mum and continuously tunable operation in the above range have been obtained.
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Degawa M, Nakayama M, Konno Y, Masubuchi K, Yamazoe Y. 2-Methoxy-4-nitroaniline and its isomers induce cytochrome P4501A (CYP1A) enzymes with different selectivities in the rat liver. Biochim Biophys Acta 1998; 1379:391-8. [PMID: 9545601 DOI: 10.1016/s0304-4165(97)00118-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We reported previously that 2-methoxy-4-nitroaniline (2-MeO-4-NA) is a selective inducer of cytochrome P4501A2 (CYP1A2) in the rat liver, and its molecular size is the smallest among known CYP1A2-selective inducers. In the present study, a structure-activity relationship on the CYP1A2-selective induction has been investigated using isomeric nitroanisidines and their related chemicals. Western blot analyses revealed that the chemicals removed a substituent (amino, methoxyl or nitro group) from a 2-MeO-4-NA molecule had no capacity for inducing CYP1A enzymes in rat livers. On the other hand, isomeric nitroanisidines such as 2-MeO-4-NA, 2-MeO-5-NA and 4-MeO-2-NA induced both CYP1A2 and CYP1A1 enzymes with different selectivities. As judged from the induced levels of CYP1A proteins, 2-MeO-4-NA (CYP1A2/CYP1A1 ratio; 9.5) and 4-MeO-2-NA (0.3) were the most selective inducers of CYP1A2 and CYP1A1, respectively, among the isomeric nitroanisidines (0.44 mmol/kg) used. The induced level of CYP1A2 protein was in the order 2-MeO-4-NA > 2-MeO-5-NA > 4-MeO-2-NA, although no significant difference was observed on their CYP1A2 mRNA level. On the contrary, increases in the levels of CYP1A1 mRNA and protein were in the order 4-MeO-2-NA > 2-MeO-5-NA > 2-MeO-4-NA. The present findings indicate that all three substituents (amino, methoxyl and nitro groups) are necessary components of nitroanisidines for induction of CYP1A enzymes, and also show that regio-isomeric positions of these substituents determine the selectivity in the induction of CYP1A enzymes.
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Affiliation(s)
- M Degawa
- Faculty of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
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Shimoda S, Nishida K, Sakakida M, Konno Y, Ichinose K, Uehara M, Nowak T, Shichiri M. Closed-loop subcutaneous insulin infusion algorithm with a short-acting insulin analog for long-term clinical application of a wearable artificial endocrine pancreas. Front Med Biol Eng 1998; 8:197-211. [PMID: 9444512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Considering the management and safety of the insulin delivery route when a wearable artificial endocrine pancreas is applied to ambulatory diabetic patients on a long-term basis, we developed a s.c. insulin infusion algorithm by analyzing the dynamics of a s.c. injected short-acting insulin analog (Insulin Lispro) by a three-compartment model. Principally the insulin infusion algorithm was developed as a transfer function with the first-order delay in both proportional and derivative actions to blood glucose concentrations. The parameters for this algorithm were calculated to simulate a physiological plasma insulin profile as closely as possible. By applying this algorithm with regular insulin, diabetic patients showed a 2 h postprandial hyperglycemia and a delayed hyperinsulinemia, followed by hypoglycemic episodes 4-5 h after oral glucose load, just as observed in the computer simulation study. However, using Insulin Lispro, a near-physiological glycemic control (postprandial blood glucose of 153.1 +/- 8.3 mg/100 ml at 60 min and 90.3 +/- 7.1 mg/100 ml at 180 min, respectively) could be achieved without showing any delayed hyperinsulinemia or hypoglycemia. Daily glycemic excursions were also controlled near-physiologically and although the daily insulin requirement (731.7 +/- 160.5 mU/kg/day) was slightly higher, it was not significantly different from that with i.v. insulin infusion (622.3 +/- 142.6 mU/kg/day). These results indicate that the application of s.c. insulin infusion algorithm with Insulin Lispro is feasible for long-term glycemic control with a wearable artificial endocrine pancreas in ambulatory diabetic patients.
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Affiliation(s)
- S Shimoda
- Department of Metabolic Medicine, Kumamoto University School of Medicine, Japan
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Konno Y, Nishida K, Shimoda S, Sakakida M, Shichiri M. [Long-term clinical application of wearable artificial endocrine pancreas]. Nihon Rinsho 1997; 55 Suppl:282-7. [PMID: 9434481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Y Konno
- Department of Metabolic Medicine, Kumamoto University School of Medicine
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Kagatani S, Shinoda T, Konno Y, Fukui M, Ohmura T, Osada Y. Electroresponsive pulsatile depot delivery of insulin from poly(dimethylaminopropylacrylamide) gel in rats. J Pharm Sci 1997; 86:1273-7. [PMID: 9383739 DOI: 10.1021/js9700762] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We describe a model for pulsatile drug delivery with an electroresponsive polymer that is stimulated by an externally applied electrical field. Insulin loaded in an electroresponsive poly(dimethylaminopropylacrylamide) (PDMAPAA) gel was administered as a subcutaneous depot in rats. The gel induced a pulsatile plasma glucose decrease in correspondence to stimulation with a constant current of 1.0 mA (0.36 mA/cm2). The first drop occurred at 0.5 h after a 1-min application of current at 0 h and the second drop occurred at 3 h after a 10-min application of current at 2 h. Calculation of pharmacological bioavailability showed that the gel released 0.12% of the loaded insulin after these two stimuli. This in vivo study demonstrates the feasibility of this pulsatile delivery system. The mechanism of insulin release from the electroresponsive PDMAPAA gel is associated with electrokinetic flow of solvated insulin with water; that is, transportation process of counterions (electrophoresis) and water molecules (electroosmosis) in the crosslinked polyelectrolyte gel network.
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Affiliation(s)
- S Kagatani
- Novel Pharma Research Laboratories, Yamanouchi Pharmaceutical Company, Ltd., Shizuoka, Japan
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Ohba S, Kimura K, Mise N, Konno Y, Suzuki N, Miyashita K, Tojo A, Hirata Y, Uehara Y, Atarashi K, Goto A, Omata M. Differential localization of s and e antigens in hepatitis B virus-associated glomerulonephritis. Clin Nephrol 1997; 48:44-7. [PMID: 9247778] [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: 02/04/2023] Open
Abstract
We report here a case of membranous glomerulonephritis associated with chronic hepatitis B (HB) virus infection and describe differential localization of HB antigens in glomeruli. The patient showed mild proteinuria and was positive for hepatitis B surface (HBs) antigen, hepatitis B envelope (HBe) antigen, and antibody to hepatitis B core (HBc) antigen in the serum. The antibody against hepatitis C was negative. A renal biopsy revealed membranous glomerulonephritis with mesangial proliferation. The immunohistochemical studies using monoclonal antibodies localized the HBe antigen along the capillary wall and the HBs antigen in the mesangial area. The immunoelectron microscopic study confirmed the localization of HB antigens: HBe antigen was located in the subepithelial and intramembranous electron dense deposits and HBs antigen in the mesangial deposits. Our present results provide the first report of the differential localization of HB antigens in glomeruli at both the light and electron microscopic levels. The differential localization of HB antigens will provide insight into the pathogenesis of membranous glomerulonephritis.
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Affiliation(s)
- S Ohba
- Second Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Japan
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Kubota N, Konno Y, Miura S, Saito K, Sugita K, Watanabe K, Sugo T. Comparison of Two Convection-Aided Protein Adsorption Methods Using Porous Membranes and Perfusion Beads. Biotechnol Prog 1996. [DOI: 10.1021/bp960076s] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Chalfant CE, Ohno S, Konno Y, Fisher AA, Bisnauth LD, Watson JE, Cooper DR. A carboxy-terminal deletion mutant of protein kinase C beta II inhibits insulin-stimulated 2-deoxyglucose uptake in L6 rat skeletal muscle cells. Mol Endocrinol 1996; 10:1273-81. [PMID: 9121494 DOI: 10.1210/mend.10.10.9121494] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Alternative splicing of pre-mRNA encoding the carboxy-terminal (C-terminal) exons of protein kinase C beta (PKC beta) leads to the expression of two protein isoforms, PKC beta 1 and PKC beta II, with the potential for different functions. PKC beta II expression is regulated by insulin via alternative mRNA splicing. A physiological consequence of its activation was investigated in L6 rat skeletal muscle cells expressing GLUT4 transporters, a cell line in which PKC is involved in glucose transport. We examined the contribution of PKC beta II for insulin-stimulated [3H]2-deoxyglucose uptake by constructing three PKC beta II C-terminal deletion mutants designated M216, M217, and M218. When transiently expressed in COS1 cells, M217, with nine amino acids deleted, demonstrated autophosphorylation activity 10-fold less than full-length PKC beta II. The mutants M218, with 13 amino acids deleted, and M216, with 52 amino acids deleted, demonstrated no autophosphorylation activity and are kinase negative. When transiently expressed in L6 myotubes, M217 inhibited insulin-stimulated 2-deoxyglucose uptake by 45% (with a 45% transfection efficiency) whereas M216 and M218, kinase-negative mutants, had no effect compared with cells transfected with control plasmid. Cotransfection of full-length PKC beta II with M217 was able to rescue the inhibition of insulin-stimulated 2-deoxyglucose uptake as compared with cotransfection of M217 with the control plasmid, suggesting that M217 acts as a dominant-negative. In contrast, cotransfection of full-length PKC beta I, the other alternatively spliced form, did not rescue inhibition of insulin-stimulated 2-deoxyglucose uptake by M217. To further demonstrate the involvement of PKC, specifically PKC beta II, in insulin-stimulated 2-deoxyglucose uptake, we used two inhibitors, CG41251 (a specific PKC inhibitor) and CG53353 (a PKC beta II-specific inhibitor at 1 microM). Both inhibited insulin-stimulated 2-deoxyglucose uptake 50-60% in L6 myotubes. We conclude that M217 may act as a specific PKC beta II dominant-negative and that PKC beta II is more specific for insulin-stimulated 2-deoxyglucose uptake in these cells than PKC beta I.
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Affiliation(s)
- C E Chalfant
- Department of Biochemistry, University of South Florida College of Medicine, Tampa, USA
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Hino J, Takao M, Takeshita N, Konno Y, Nishizawa T, Matsuo H, Kangawa K. cDNA cloning and genomic structure of human bone morphogenetic protein-3B (BMP-3b). Biochem Biophys Res Commun 1996; 223:304-10. [PMID: 8670277 DOI: 10.1006/bbrc.1996.0889] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BMP-3b (also termed GDF-10) is a novel BMP-3 related protein recently discovered in rat femur tissue by molecular cloning. In this paper, we have isolated cDNA and the gene for human BMP-3b and determined their structure. Cloned human BMP-3b cDNA with a size of 2632 base pairs encodes a 478 amino acid precursor protein sharing 83% identity with rat BMP-3b. The human BMP-3b gene is composed of 3 exons and spans approximately 13 kilobases of DNA. The 5' flanking region carries no typical TATA box but G+C rich sequences. Southern blot analysis revealed that the BMP-3b gene is situated in a single locus of chromosome 10. By Northern analysis, human BMP-3b transcripts were detected primarily in femur, brain, lung, skeletal muscle, pancreas and testis.
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Affiliation(s)
- J Hino
- National Cardiovascular Center Research Institute, Fujishirodai, Suita, Osaka, Japan
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Takao M, Hino J, Takeshita N, Konno Y, Nishizawa T, Matsuo H, Kangawa K. Identification of rat bone morphogenetic protein-3b (BMP-3b), a new member of BMP-3. Biochem Biophys Res Commun 1996; 219:656-62. [PMID: 8605043 DOI: 10.1006/bbrc.1996.0289] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Rat bone morphogenetic protein-3 (BMP-3) cDNA and BMP-3b cDNA were isolated from rat femur cDNA library by the RT-PCR method using degenerate oligonucleotide primers corresponding to human BMP-3. The deduced amino acid sequence of rat BMP-3 in the mature region reveals 2 amino acid changes compared to that of human BMP-3 (98% identity). The deduced BMP-3b amino acid sequence shows 81% similarity with the mature region of rat BMP-3 and only 37% similarity with the propeptide region. By Northern blot analysis, rat BMP-3b mRNA was detected in costa, costicartilage, femur, calvaria, trachea, aorta and brain. Among these tissues, BMP-3b transcripts were predominantly expressed in cerebellum. BMP-3 mRNA was found in femur, calvaria, trachea, lung and ovary. Although BMP-3b and BMP-3 are very closely related to each other, their transcripts are distributed in different tissues except that both are found in bone. The distribution pattern of BMP-3b mRNA suggests that BMP-3b plays an important role in the central nervous system as well as in bone formation and remodeling.
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Affiliation(s)
- M Takao
- National Cardiovascular Center Research Institute, Fujishirodai, Suita, Osaka, Japan
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Kayashima T, Yamaguchi K, Konno Y, Nanimatsu H, Aragaki S, Shichiri M. Effects of early introduction of intensive insulin therapy on the clinical course in non-obese NIDDM patients. Diabetes Res Clin Pract 1995; 28:119-25. [PMID: 7587919 DOI: 10.1016/0168-8227(95)01066-m] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In order to reconsider the extent of indication of insulin therapy in non-insulin dependent diabetes mellitus (NIDDM), we performed the following trial in a prospective fashion. At the beginning phase of treatment for diabetes, we introduced intensive insulin therapy in 22 non-obese (Body mass index approximately 24 kg/m2) NIDDM patients without proliferative retinopathy, who were selected in a standardized fashion, avoiding any arbitrary choice. None had received oral hypoglycemic agents (OHA) or insulin yet. By administering insulin 3 or 4 times a day, strict glycemic control was attained and maintained, and then the insulin dose was gradually lowered while keeping good glycemic control. In patients whose glycemic control was maintained at an excellent level for more than 7 days under an insulin dosage lower than 8 u/day, insulin therapy was discontinued. As a result, 15 patients (68%) attained good glycemic control both without insulin and OHA almost within a month and 6 patients (27%) shifted to OHA. It is recommended to introduce intensive insulin therapy in non-obese NIDDM patients without proliferative retinopathy and to aim at attaining good glycemic control both without insulin and OHA.
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Affiliation(s)
- T Kayashima
- First Department of Internal Medicine, Oita Prefectural Hospital, Japan
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Shichiri M, Kishikawa H, Sakakida M, Kajiwara K, Hashiguchi Y, Nishida K, Uemura T, Konno Y, Ichinose K. Artificial endocrine pancreas and optimal blood glucose regulation in diabetic patients--from bedside-type to wearable-type. Diabetes Res Clin Pract 1994; 24 Suppl:S251-9. [PMID: 7859615 DOI: 10.1016/0168-8227(94)90258-5] [Citation(s) in RCA: 6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The artificial endocrine pancreas is a feedback control system regulating insulin delivery on a minute-by-minute basis according to the measured blood glucose levels. The bedside-type artificial endocrine pancreas has been proven to be useful not only as a therapeutic tool for diabetes mellitus but also as an elegant research tool for investigating the pathophysiology of the disease. With significant advances in the development of a subcutaneous tissue glucose monitoring system, the wearable-type artificial endocrine pancreas has been applied to diabetic patients. With this system, perfect glycemic control can be obtained for longer periods in ambulatory diabetic patients. The trend in the development of the artificial endocrine pancreas is now directed to implantable devices. Much efforts have been conducted to realize these devices.
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Affiliation(s)
- M Shichiri
- Department of Metabolic Medicine, Kumamoto University Medical School, Japan
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Konno Y, Takahashi S, Naruse R, Mikami T, Matsumoto T, Suzuki S, Suzuki M. Antimetastatic effect of yeast mannan-bleomycin conjugate against mouse Lewis lung carcinoma. Biol Pharm Bull 1994; 17:748-52. [PMID: 7522733 DOI: 10.1248/bpb.17.748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A conjugate of bleomycin (BLM) and the mannan of bakers' yeast (Saccharomyces cerevisiae wild type strain) (WNM) was synthesized. The assay of its antimetastatic effect on Lewis lung carcinoma (3LL) implanted in C57BL/6 mice showed that this conjugate exhibited a higher antimetastatic effect and longer life-span elongation than those of free bleomycin and mannan with corresponding doses. This conjugate was also found to kill the 3LL cells in vitro. 14C-Labeled mannan-bleomycin conjugate was much more bound than 14C-labeled dextran-bleomycin conjugate to the 3LL. It was concluded that the anti-cancer mechanism of this conjugate, WNM-BLM possessed a specific binding effect to the tumor cells and exhibited a cytocidal effect on the 3LL target cells.
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Affiliation(s)
- Y Konno
- Department of Microbiology, Tohoku College of Pharmacy, Miyagi, Japan
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