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Mizuki K, Sakai D, Hatashima Y, Hatta T. Synthesis and Optical Properties of Polyarylimidazole Derivatives Containing Naphthyl Groups In the 4,5-Positions for Coated and Non-Doped OLED Materials. HETEROCYCLES 2019. [DOI: 10.3987/com-19-14053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Mizuki K, Matsumoto S, Honda T, Maeda K, Toyama S, Iohara D, Hirayama F, Okazaki S, Takeshita K, Hatta T. Synthesis, Aggregation Behavior, and Photodynamic Properties of a Water-Soluble Fulleropyrrolidine Bearing an N-PEG Pyridinium Unit. Chem Pharm Bull (Tokyo) 2018; 66:822-825. [DOI: 10.1248/cpb.c18-00206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keiji Mizuki
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Seigo Matsumoto
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Taro Honda
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Kouhei Maeda
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Satoshi Toyama
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | | | | | | | | | - Taizo Hatta
- Department of Nanoscience, Faculty of Engineering, Sojo University
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Nagai A, Tsutsumi S, Michida W, Sakuragi M, Mizuki K, Kusakabe K. Encapsulation of Isolated C60 Molecules in a Cyclodextrin-based Metal-Organic Framework. Journal of Chemical Engineering of Japan 2018. [DOI: 10.1252/jcej.17we333] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anna Nagai
- Department of Nanoscience, Sojo University
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Michida W, Nagai A, Sakemura T, Sakuragi M, Mizuki K, Kusakabe K. Fluorescent Properties of Fluorescein and Rhodamine B in Cyclodextrin-Based Metal-Organic Framework. KAGAKU KOGAKU RONBUN 2018. [DOI: 10.1252/kakoronbunshu.44.161] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Anna Nagai
- Department of Nanoscience, Sojo University
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Akai T, Hatta T, Shimada H, Mizuki K, Kudo N, Hatta T, Otani H. Extracranial outflow of particles solved in cerebrospinal fluid: Fluorescein injection study. Congenit Anom (Kyoto) 2018; 58:93-98. [PMID: 28976018 DOI: 10.1111/cga.12257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 09/12/2017] [Accepted: 09/26/2017] [Indexed: 11/30/2022]
Abstract
Cerebrospinal fluid is thought to be mainly absorbed into arachnoid granules in the subarachnoid space and drained into the sagittal sinus. However, some observations such as late outbreak of arachnoid granules in fetus brain and recent cerebrospinal fluid movements study by magnetic resonance images, conflict with this hypothesis. In this study, we investigated the movement of cerebrospinal fluid in fetuses. Several kinds of fluorescent probes with different molecular weights were injected into the lateral ventricle or subarachnoid space in mouse fetuses at a gestational age of 13 days. The movements of the probes were monitored by live imaging under fluorescent microscope. Following intraventricular injection, the probes dispersed into the 3rd ventricle and aqueduct immediately, but did not move into the 4th ventricle and spinal canal. After injection of low and high molecular weight conjugated probes, both probes dispersed into the brain but only the low molecular weight probe dispersed into the whole body. Following intra-subarachnoid injection, both probes diffused into the spinal canal gradually. Neither probe dispersed into the brain and body. The probe injected into the lateral ventricle moved into the spinal central canal by the fetus head compression, and returned into the aqueduct by its release. We conclude this study as follows: (i) The movement of metabolites in cerebrospinal fluid in the ventricles will be restricted by molecular weight; (ii) Cerebrospinal fluid in the ventricle and in the subarachnoid space move differently; and (iii) Cerebrospinal fluid may not appear to circulate. In the event of high intracranial pressure, the fluid may move into the spinal canal.
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Affiliation(s)
- Takuya Akai
- Department of Neurosurgery, Kanazawa Medical University, Uchinada, Japan.,Department of Neurosurgery, Toyama University, Toyama, Japan
| | - Toshihisa Hatta
- Department of Anatomy, Kanazawa Medical University, Uchinada, Japan
| | - Hiroki Shimada
- Department of Anatomy, Kanazawa Medical University, Uchinada, Japan
| | - Keiji Mizuki
- Department of Nanoscience, Sojo University, Kumamoto, Japan
| | - Nae Kudo
- Department of Nanoscience, Sojo University, Kumamoto, Japan
| | - Taizo Hatta
- Department of Nanoscience, Sojo University, Kumamoto, Japan
| | - Hiroki Otani
- Department of Developmental Biology, Shimane University, Izumo, Japan
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Katafuchi Y, Li Q, Tanaka Y, Shinozuka S, Kawamitsu Y, Izumi M, Ekino K, Mizuki K, Takegawa K, Shibata N, Goto M, Nomura Y, Ohta K, Oka T. GfsA is a β1,5-galactofuranosyltransferase involved in the biosynthesis of the galactofuran side chain of fungal-type galactomannan in Aspergillus fumigatus. Glycobiology 2017; 27:568-581. [DOI: 10.1093/glycob/cwx028] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 03/24/2017] [Indexed: 01/01/2023] Open
Affiliation(s)
- Yukako Katafuchi
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Qiushi Li
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Yutaka Tanaka
- Department of Infection and Host Defense, Tohoku Medical and Pharmaceutical University, Komatsushima 4-4-1, Sendai 981-8558, Japan
| | - Saki Shinozuka
- Graduate School of Environmental and Life Science, Okayama University, Tsushimanaka 1-1-1, Okayama 700-8530, Japan
| | - Yohei Kawamitsu
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Minoru Izumi
- Graduate School of Environmental and Life Science, Okayama University, Tsushimanaka 1-1-1, Okayama 700-8530, Japan
| | - Keisuke Ekino
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Keiji Mizuki
- Department of Nanoscience, Faculty of Engineering, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Kaoru Takegawa
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Hakozaki 6-10-1, Fukuoka 812-8581, Japan
| | - Nobuyuki Shibata
- Department of Infection and Host Defense, Tohoku Medical and Pharmaceutical University, Komatsushima 4-4-1, Sendai 981-8558, Japan
| | - Masatoshi Goto
- Department of Applied Biochemistry and Food Science, Saga University, Honjo-machi 1, Saga 840-8502, Japan
| | - Yoshiyuki Nomura
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Kazuyoshi Ohta
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
| | - Takuji Oka
- Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan
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Nishi K, Seto N, Iwasaki W, Matsuoka Y, Kashiwa Y, Sano Y, Kawaharada T, Yazumi T, Mizuki K. NIR-Fluorescent Ethyl 4,7-Bis(5-arylthiophen-2-yl)-1,2,5-oxadiazolo[3,4-c]pyridine-6-carboxylate. HETEROCYCLES 2015. [DOI: 10.3987/com-15-13197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Zhu Y, Ogaeri T, Suzuki JI, Dong S, Aoyagi TI, Mizuki K, Takasugi M, Isobe SI, Kiyama R. Application of Fluolid-Orange-labeled probes for DNA microarray and immunological assays. Biotechnol Lett 2011; 33:1759-66. [PMID: 21626418 DOI: 10.1007/s10529-011-0646-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Accepted: 05/17/2011] [Indexed: 11/30/2022]
Abstract
The usefulness of Fluolid-Orange, a novel fluorescent dye, for DNA microarray and immunological assays has been examined. Fluolid-Orange-labeled probes (DNA and IgG) were stable as examined by laser-photo-bleaching and under heat and dry conditions. Statistical analyses were performed to evaluate the reproducibility of the microarray assay, while stage-specific immunostaining of marker proteins, Kank1 and calretinin, was performed for renal cancers, both giving satisfactory results. The stability of the dye should provide advantages for storing fluorescently labeled probes and re-examining the specimens later in genetic and pathological diagnostics.
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Affiliation(s)
- Yun Zhu
- Signaling Molecules Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
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9
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Shimada H, Hirai KI, Simamura E, Hatta T, Iwakiri H, Mizuki K, Hatta T, Sawasaki T, Matsunaga S, Endo Y, Shimizu S. Paraquat toxicity induced by voltage-dependent anion channel 1 acts as an NADH-dependent oxidoreductase. J Biol Chem 2009; 284:28642-9. [PMID: 19717555 DOI: 10.1074/jbc.m109.033431] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Paraquat (PQ), a herbicide used worldwide, causes fatal injury to organs upon high dose ingestion. Treatments for PQ poisoning are unreliable, and numerous deaths have been attributed inappropriate usage of the agent. It is generally speculated that a microsomal drug-metabolizing enzyme system is responsible for PQ toxicity. However, recent studies have demonstrated cytotoxicity via mitochondria, and therefore, the cytotoxic mechanism remains controversial. Here, we demonstrated that mitochondrial NADH-dependent PQ reductase containing a voltage-dependent anion channel 1 (VDAC1) is responsible for PQ cytotoxicity. When mitochondria were incubated with NADH and PQ, superoxide anion (O(2)(*)) was produced, and the mitochondria ruptured. Outer membrane extract oxidized NADH in a PQ dose-dependent manner, and oxidation was suppressed by VDAC inhibitors. Zymographic analysis revealed the presence of VDAC1 protein in the oxidoreductase, and the direct binding of PQ to VDAC1 was demonstrated using biotinylated PQ. VDAC1-overexpressing cells showed increased O(2)(*) production and cytotoxicity, both of which were suppressed in VDAC1 knockdown cells. These results indicated that a VDAC1-containing mitochondrial system is involved in PQ poisoning. These insights into the mechanism of PQ poisoning not only demonstrated novel physiological functions of VDAC protein, but they may facilitate the development of new therapeutic approaches.
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Affiliation(s)
- Hiroki Shimada
- Molecular and Cell Structural Science, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan.
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Kanemaru T, Hirata K, Takasu SI, Isobe SI, Mizuki K, Mataka S, Nakamura KI. A fluorescence scanning electron microscope. Ultramicroscopy 2009; 109:344-9. [PMID: 19211187 DOI: 10.1016/j.ultramic.2009.01.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 12/22/2008] [Accepted: 01/06/2009] [Indexed: 12/01/2022]
Abstract
Fluorescence techniques are widely used in biological research to examine molecular localization, while electron microscopy can provide unique ultrastructural information. To date, correlative images from both fluorescence and electron microscopy have been obtained separately using two different instruments, i.e. a fluorescence microscope (FM) and an electron microscope (EM). In the current study, a scanning electron microscope (SEM) (JEOL JXA8600M) was combined with a fluorescence digital camera microscope unit and this hybrid instrument was named a fluorescence SEM (FL-SEM). In the labeling of FL-SEM samples, both Fluolid, which is an organic EL dye, and Alexa Fluor, were employed. We successfully demonstrated that the FL-SEM is a simple and practical tool for correlative fluorescence and electron microscopy.
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Affiliation(s)
- Takaaki Kanemaru
- Morphology and Core Unit, Kyushu University Hospital, Kyushu, Japan
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Mizuki K, Nojima T, Juskowiak B, Takenaka S. Tetrakis-acridinyl peptide: distance dependence of photoinduced electron transfer in deoxyribonucleic acid assemblies. Anal Chim Acta 2006; 578:88-92. [PMID: 17723698 DOI: 10.1016/j.aca.2006.05.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Revised: 05/11/2006] [Accepted: 05/13/2006] [Indexed: 11/28/2022]
Abstract
The distance dependence of photoinduced electron transfer in deoxyribonucleic acid (DNA) duplex was investigated using the "TAP cassette" systems of the general formula (AT)6A(n)XA(9-n) (X denote guanine (G) or cytosine (C)). The tetrakis-9-acridinyl peptide (TAP) binds tightly with (AT)6 duplex region showing strong fluorescence that was not quenched by the A(n)XA(9-n) single-stranded region. Quenching was observed after duplex formation with the complementary T(9-n)XT(n) strand (G-C pairing), showing clear dependence on the distance between the TAP and a guanine. An extremely low beta value of 0.22 was obtained in our electron transfer (ET) system that suggests exceptional good mediation of ET process. Experiments with G-mismatches showed negligible quenching for systems with guanine separated by more than one AT base pair that indicated rather inefficient ET process for duplexes containing disrupted pi-electronic system.
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Affiliation(s)
- Keiji Mizuki
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
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Mizuki K, Sakakibara Y, Ueyama H, Nojima T, Waki M, Takenaka S. Fluorescence enhancement of bis-acridine orange peptide, BAO, upon binding to double stranded DNA. Org Biomol Chem 2005; 3:578-80. [PMID: 15703790 DOI: 10.1039/b417391k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis-acridine orange peptides carrying two acridine oranges at the epsilon-amino moieties of both terminal lysines of a tetra(lysine) chain showed a ca. 200-fold fluorescence enhancement upon addition of double stranded DNA.
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Affiliation(s)
- Keiji Mizuki
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka, 812-8581, Japan
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Ueyama H, Mizuki K, Nojima T, Takenaka S. Bis-intercalation-triggered fluorescence: Specific detection of double stranded DNA and AT content estimation. Analyst 2004; 129:886-7. [PMID: 15457315 DOI: 10.1039/b410291f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detection of double stranded DNA and estimation of the AT content in DNA of unknown concentration could be achieved with a bis-acridinyl peptide carrying fluorescein, FKA.
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Affiliation(s)
- Hiroyuki Ueyama
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka, 812-8581, Japan
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Hayashida O, Mizuki K, Akagi K, Matsuo A, Kanamori T, Nakai T, Sando S, Aoyama Y. Macrocyclic glycoclusters. Self-aggregation and phosphate-induced agglutination behaviors of calix[4]resorcarene-based quadruple-chain amphiphiles with a huge oligosaccharide pool. J Am Chem Soc 2003; 125:594-601. [PMID: 12517177 DOI: 10.1021/ja0275663] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [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: 11/28/2022]
Abstract
Macrocyclic glycocluster compounds 2n (n = 2-7) with four alkyl (undecyl) chains and eight oligosaccharide moieties on the opposite sides of the calix[4]resorcarene macrocycle are prepared from the reactions of the corresponding octaamine derivative with maltooligosaccharide lactones. Combined evidence from dynamic light scattering (DLS), gel permeation chromatography (GPC), and transmission electron microscopy (TEM) indicates that they form small micelle-like nanoparticles (d congruent with 3 nm) in water. In the presence of Na2HPO4/NaH2PO4, nanoparticles are agglutinated with phosphate ions as a glue to grow in size up to 60-100 nm, as revealed by DLS as well as microscopy (TEM and AFM). The phosphate-induced agglutination processes can be followed by surface plasmon resonance (SPR). Amphiphile 2n is readily immobilized on the hydrophobized sensor chip of SPR to give a closely packed monolayer with oligosaccharide moieties exposed to bulk water. While there is no further adsorption of 2n on the resulting monolayer, this does occur when the latter is pretreated with the phosphate salts, ultimately giving rise to a multilayer upon repeated treatment of the chip with 2n and Na2HPO4/NaH2PO4 in an alternate manner. Kinetic analyses show that the phosphate-mediated inter(saccharide) interactions in terms of rate and affinity are markedly dependent on the oligosaccharide chain lengths (n), becoming more favorable with increasing n's. The novel aggregation and agglutination behaviors observed are discussed in terms of immobilizable and irreversible micelles on the basis of the cone-shaped structure of quadruple-chain amphiphile 2n having a huge saccharide pool and the efficiency of multiple hydrogen bonding therein. The unique intermolecular binding properties of compound 22 and analogues so far reported are reviewed in light of the present finding.
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Affiliation(s)
- Osamu Hayashida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Sakyo-ku, Japan
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Yamazaki Y, Tanaka C, Hayamizu F, Mizuki K. [Correlation between blue chromatic macular sensitivity and optic disc change in early glaucoma patients]. Nippon Ganka Gakkai Zasshi 2001; 105:776-80. [PMID: 11758347] [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: 02/23/2023]
Abstract
PURPOSE To investigate the relationship between morphological changes of the optic nerve head (ONH) and macular sensitivity(MS) determined with blue-on-yellow(B on Y) and white on white (W on W) perimetry in normal subjects and patients with glaucoma. METHODS One randomly chosen eye was evaluated in each of 28 normal subjects, 23 patients with ocular hypertension(OH), and 23 patients with early primary open-angle glaucoma(POAG). Mean values for MS by B on Y and W on W perimetry were obtained with the macular program using a modified Humphrey Field Analyzer(HFA). The Heidelberg Retina Tomograph(HRT) with software version 2.01 was used to evaluate the topographic parameters of temporal sector in ONH. RESULTS There was no significant difference in temporal topographic parameters of ONH among the three clinical groups. Mean values for MS of B on Y and W on W perimetry in early POAG were significantly lower than in normal subjects and OH. Mean values for MS of W on W perimetry showed no significant correlation with ONH parameters of the temporal sector. In early POAG, mean values for MS of B on Y perimetry significantly correlated with cup area, cup/disc area ratio, cup volume, and rim volume in the temporal sector of ONH. CONCLUSION The measurement of mean MS of B on Y might be able to detect the glaucomatous optic nerve damage due to increased intraocular pressure prior to the morphological changes of ONH in early stages of glaucoma.
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Affiliation(s)
- Y Yamazaki
- Department of Ophthalmology, Nihon University School of Medicine, 30-1 Oyaguchikami-machi, Itabashi-ku, Tokyo 173-8610, Japan
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Abstract
An abietane-type diterpene, named vitetrifolin A, and two labdane-type diterpenes, named vitetrifolins B and C, were isolated from the acetone extract of the fruits of Vitex trifolia L. (Viticis Fructus; Verbenaceae) along with three known diterpenes, rotundifuran, dihydrosolidagenone and abietatriene 3beta-ol. The structures of these compounds were elucidated on the basis of spectroscopic analysis, X-ray crystallographic analysis and chemical evidence.
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Affiliation(s)
- M Ono
- Research Institute of General Education, Kyushu Tokai University, Aso, Kumamoto, Japan.,.
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Abstract
Purpose: The effect of topical 2% carteolol hydrochloride on the ocular blood flow dynamics in normal human eyes was studied.Materials and Methods: Ten healthy volunteers were studied using color Doppler imaging and scanning laser Doppler flowmetry. In the first experiments, one eye received 30 µl of 2% carteolol hydrochloride twice daily for 7 days and the fellow eye a placebo in a randomized masked manner. The blood flow velocity of the central retinal artery, the ophthalmic artery, and the short posterior ciliary artery, the blood flow volume of the peripapillary retina (PPR), intraocular pressure (IOP), ocular perfusion pressure (OPP) and pulse rate (PR) were measured before treatment, 2 hours after the initial instillation, and after the last instillation on the 7th day. In the control experiments, 30 µl of placebo was instilled in both eyes, and the above parameters were measured according to the same time schedule as in the first experiments.Results: In the carteolol-treated eyes, the systolic maximum (p = 0.012) and diastolic minimum (p = 0.019) blood flow velocities of the ophthalmic artery, and the blood flow volume of the superior (p = 0.003), central (p = 0.001) and inferior (p = 0.000) PPR showed significant increases in the first experiments compared with the control experiments. IOP and OPP in both eyes showed significant reduction in the first experiments compared with the control study.Conclusion: These results indicated that topical carteolol hydrochroride increases the blood flow of the intraorbital microcirculation and PPR.
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Affiliation(s)
- K Mizuki
- Department of Ophthalmology, Nihon University School of Medicine, Nihon, Japan
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Mizuki K, Yamazaki Y. [Effect of carteolol hydrochloride on ocular blood flow dynamics in normal human eyes]. Nippon Ganka Gakkai Zasshi 2000; 104:226-31. [PMID: 10793541] [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: 02/16/2023]
Abstract
PURPOSE The effect of topical 2% calteolol hydrochloride on the ocular blood flow dynamics in normal human eyes was studied. MATERIALS AND METHODS Ten healthy volunteers were studied using color Doppler imaging and scanning laser Doppler flowmetry. In the first experiments, one eye received 30 microliters of 2% carteolol hydrochloride twice daily for 7 days and the fellow eye a placebo in a randomized masked manner. The blood flow velocity of the central retinal artery, the ophthalmic artery, and the short posterior ciliary artery, the blood flow volume of the peripapillary retina (PPR), intraocular pressure (IOP), ocular perfusion pressure (OPP) and pulse rate (PR) were measured before treatment, 2 hours after the initial instillation, and after the last instillation on the 7th day. In the control experiments, 30 microliters of placebo was instillated in both eyes, and the above parameters were measured according to the same time schedule as in the first experiments. RESULTS In the carteolol-treated eyes, the systolic maximum (p = 0.012) and diastolic minimum (p = 0.019) blood flow velocities of the ophthalmic artery, and the blood flow volume of the superior (p = 0.003), central (p = 0.001) and inferior (p = 0.000) PPR showed significant increases in the first experiments compared with the control experiments. IOP and OPP in both eyes showed significant reduction in the first experiments compared with the control study. CONCLUSION These results indicated that topical carteolol hydrochroride increases the blood flow of the intraorbital microcirculation and PPR.
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Affiliation(s)
- K Mizuki
- Department of Ophthalmology, Nihon University School of Medicine, Tokyo, Japan
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Ishikawa H, Yoshihara M, Mizuki K, Kashima Y. [A pediatric case of ophthalmoplegic migraine with recurrent oculomotor nerve palsy]. Nippon Ganka Gakkai Zasshi 2000; 104:179-82. [PMID: 10752342] [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: 02/16/2023]
Abstract
PURPOSE A young patient of ophthalmoplegic migraine with recurrent oculomotor nerve palsy is reported. CASE A 4-year-old girl came to our hospital complaining of recurrent left ptosis and double vision which completely resolved within a few days. She had a history of drowsiness after vomiting every two months. Left oculomotor nerve palsy with internal ophthalmoplegia was observed. Electroencephalography revealed mild changes, but computed tomography, single photon emission computed tomography, and cerebrovascular Doppler-ultrasound examination demonstrated no abnormalities. This oculomotor nerve palsy completely improved on the next day. RESULTS Thereafter, left episodic mydriasis and oculomotor nerve palsy occurred twice each. However, the frequency and symptoms of migraine were remarkably reduced by topical administration of 0.25% timolol maleate twice daily to both eyes. CONCLUSION In isolated oculomotor nerve palsy in childhood, ophthalmoplegic migraine should be also considered. We emphasize that a detailed case history is very important to its diagnosis.
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Affiliation(s)
- H Ishikawa
- Department of Ophthalmology, Nihon University School of Medicine, Tokyo, Japan
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Mizuki K, Kadomatsu K, Hata K, Ito T, Fan QW, Kage Y, Fukumaki Y, Sakaki Y, Takeshige K, Sumimoto H. Functional modules and expression of mouse p40(phox) and p67(phox), SH3-domain-containing proteins involved in the phagocyte NADPH oxidase complex. Eur J Biochem 1998; 251:573-82. [PMID: 9490028 DOI: 10.1046/j.1432-1327.1998.2510573.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The phagocyte NADPH oxidase is activated during phagocytosis to produce superoxide, a precursor of microbicidal oxidants. The formation of the active oxidase complex at the membrane requires translocation of the Rac GTPase and two specialized cytosolic proteins that harbor SH3 domains, p67phox and p47phox. Another SH3-domain-containing protein p40phox, which is constitutively associated with p67phox in phagocytes, also enters the complex upon cell stimulation. Here we describe how we cloned mouse cDNAs encoding p40phox and its partner in phagocytes, p67phox. Both p40phox and p67phox comprise several protein-binding modules that are structurally and functionally well conserved between mouse and human, indicating their nature as adaptor proteins. We have also systematically investigated expression of the gene for p40phox in comparison with those for p67phox and p47phox. Distributions of the mRNAs for the three proteins among tissues are similar, with the most abundant expression in the spleen. The messages are abundant not only in phagocytic cells, but also in B cell lineage. The p40phox gene, but not the other two, is expressed in some types of cells such as plasma cells and T lymphocytes. Furthermore, in situ hybridization analysis shows that the p40phox mRNA is distributed in neuronal cells of mouse brain, providing evidence that one of the genes for the specialized oxidase factors is expressed in neurons. These observations raise the possibility that the adaptor protein p40phox plays a heretofore unsuspected role via interacting with other proteins in the cells that do not express p67phox or p47phox.
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Affiliation(s)
- K Mizuki
- Department of Biochemistry, Kyushu University School of Medicine, Fukuoka, Japan
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Nakamura R, Sumimoto H, Mizuki K, Hata K, Ago T, Kitajima S, Takeshige K, Sakaki Y, Ito T. The PC motif: a novel and evolutionarily conserved sequence involved in interaction between p40phox and p67phox, SH3 domain-containing cytosolic factors of the phagocyte NADPH oxidase. Eur J Biochem 1998; 251:583-9. [PMID: 9490029 DOI: 10.1046/j.1432-1327.1998.2510583.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The superoxide-generating NADPH oxidase, dormant in resting phagocytes, is activated during phagocytosis following assembly of the membrane-integrated protein cytochrome b558 and cytosolic factors. Among the latter are the three proteins containing Src homology 3 (SH3) domains, p67phox, p47phox and p40phox. While the first two factors are indispensable for the activity, p40phox is tightly associated with p67phox in resting cells and is suggested to have some modulatory role. Here we describe a systematic analysis of the interaction between p40phox and p67phox using the yeast two-hybrid system and in vitro binding assays with recombinant proteins. Both methods unequivocally showed that the minimum requirements for stable interaction are the C-terminal region of p40phox and the region between the two SH3 domains of p67phox. This interaction is maintained even in the presence of anionic amphiphiles used for the activation of the NADPH oxidase, raising a possibility that it mediates constitutive association of the two factors in both resting and activated cells. The C-terminal region of p40phox responsible for the interaction contains a characteristic stretch of amino acids designated as the PC motif, that also exists in other signal-transducing proteins from yeast to human. Intensive site-directed mutagenesis to the motif in p40phox revealed that it plays a critical role in the binding to p67phox. Thus the PC motif appears to represent a novel module for protein-protein interaction used in a variety of signaling pathways.
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Affiliation(s)
- R Nakamura
- Human Genome Center, Institute of Medical Science, University of Tokyo, Japan
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Sumimoto H, Hata K, Mizuki K, Ito T, Kage Y, Sakaki Y, Fukumaki Y, Nakamura M, Takeshige K. Assembly and activation of the phagocyte NADPH oxidase. Specific interaction of the N-terminal Src homology 3 domain of p47phox with p22phox is required for activation of the NADPH oxidase. J Biol Chem 1996; 271:22152-8. [PMID: 8703027 DOI: 10.1074/jbc.271.36.22152] [Citation(s) in RCA: 145] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The phagocyte NADPH oxidase is activated during phagocytosis to produce superoxide, a precursor of microbicidal oxidants. The activation involves assembly of membrane-integrated cytochrome b558 comprising gp91(phox) and p22(phox), two specialized cytosolic proteins (p47(phox) and p67(phox)), each containing two Src homology 3 (SH3) domains, and the small G protein Rac. In the present study, we show that the N-terminal SH3 domain of p47(phox) binds to the C-terminal cytoplasmic tail of p22(phox) with high affinity (KD = 0.34 microM). The binding is specific to this domain among several SH3 domains including the C-terminal one of p47(phox) and the two of p67(phox) and requires the Pro156-containing proline-rich sequence but not other putative SH3 domain-binding sites of p22(phox). Replacement of Trp193 by Arg in the N-terminal SH3 domain completely abrogates the association with p22(phox). A mutant p47(phox) with this substitution is incapable of supporting superoxide production under cell-free activation conditions. These findings provide direct evidence that the interaction between the N-terminal SH3 domain of p47(phox) and the proline-rich region of p22(phox) is essential for activation of the NADPH oxidase.
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Affiliation(s)
- H Sumimoto
- Department of Biochemistry, Kyushu University School of Medicine, Fukuoka 812, Japan
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24
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Kashiwada Y, Fujioka T, Mihashi K, Marubayashi N, Mizuki K, Chen IS, Lee KH. Antitumor agents, 157. Absolute structures of cumingianosides A-F, antileukemic triterpene glucosides, and structures of the hydrolysates of cumingianoside A. J Nat Prod 1995; 58:495-503. [PMID: 7623027 DOI: 10.1021/np50118a003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The stereostructures of cumingianosides A-F, a series of triterpene glucosides with a 14,18-cycloapoeuphane skeleton, have been established by X-ray crystallographic analysis on an aglycone [1c] the acid hydrolysate of cumingianoside A [1], which is a potent cytotoxic triterpene against MOLT-4 human leukemia cells with an EC50 value of < 0.00625 microM. The 14,18-cyclopropane ring in cumingianoside A [1] was opened under acidic conditions in two different directions to give compounds with an apoeuphane skeleton and a dammarane skeleton. Furthermore, it was found that subsequent hydrolysis yielded not only an aglycone with an apoeuphane skeleton [1c] but also an apo-rearrangement product [1d].
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Affiliation(s)
- Y Kashiwada
- Natural Products Laboratory, School of Pharmacy, University of North Carolina, Chapel Hill 27599, USA
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Abstract
Six new ergostane glycosides, designated as petunioside A, petunioside B, 24-epipetunioside B, petunioside C, 24-epipetunioside C and petunioside D, were isolated from the methanolic extract of the fresh aerial parts of Petunia hybrida. Their structures were determined by means of spectroscopic analysis and single crystal X-ray analysis.
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Affiliation(s)
- K Shingu
- Faculty of Pharmaceutical Sciences, Kumamoto University, Japan
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Mizuki K, Nose K, Okamoto H, Tsuchida N, Hayashi K. Amplification of c-Ki-ras gene and aberrant expression of c-myc in WI-38 cells transformed in vitro by gamma-irradiation. Biochem Biophys Res Commun 1985; 128:1037-43. [PMID: 2581563 DOI: 10.1016/0006-291x(85)90152-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The expression of c-oncogenes was examined with normal human fibroblasts (WI-38) and the cells transformed in vitro by gamma-irradiation (CT-1). The amount of Ki-ras-specific mRNA in CT-1 cells was found to be approximately twice that in WI-38 cells. By Southern blot hybridization, the c-Ki-ras 2 gene of CT-1 cells was found to be amplified about two-fold. CT-1 cells have higher levels of c-myc mRNA than normal cells, although the gene dosage and the restriction nuclease pattern of the c-myc gene was the same. The content of c-myc mRNA in CT-1 cells was found to be constitutively high, whereas that in normal cells was increased by serum addition.
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Saito J, Mizuki K, Nishiyama H, Tsuchiya K. [Bedside nursing: approach to a patient with recurrent pneumothorax and extreme apprehension]. Kangogaku Zasshi 1980; 44:504-5. [PMID: 6772838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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28
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Nagase K, Mizuki K, Saito T. [Lymphangiography and its applications under the influence of radiocolloidal 198Au]. Nihon Igaku Hoshasen Gakkai Zasshi 1965; 25:337-45. [PMID: 5222111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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