176
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Kuratomi Y, Osaki M, Takashima Y, Yamaguchi H, Harada A. Stereoselective Complex Formation between Polybutadiene and Cyclodextrins in Bulk. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200800147] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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177
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Kanazawa T, Takashima Y, Hirayama S, Okada H. Effects of menstrual cycle on gene transfection through mouse vagina for DNA vaccine. Int J Pharm 2008; 360:164-70. [PMID: 18573624 DOI: 10.1016/j.ijpharm.2008.04.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2007] [Revised: 04/08/2008] [Accepted: 04/21/2008] [Indexed: 11/17/2022]
Abstract
Human immunodeficiency virus (HIV) infections mainly occur through the vaginal and rectal mucosal membranes. In the present study, to develop a DNA vaginal vaccine against viral and bacterial infections, the effects of the menstrual cycle on DNA transfection through the vaginal mucosa in female mice and transfection enhancement by electroporation, a chelating agent, cell-penetrating peptides (CPP) and nuclear localizing signals (NLS) were investigated. The transfection efficiencies of a marker plasmid DNA (pDNA), pCMV-Luc, on the vaginal mucosal membrane in mice at the stages of metestrus and diestrus were significantly higher than those at the stages of proestrus and estrus. The gene expression was markedly enhanced by electroporation and by pretreatment with the chelating agent. The highest level of expression was obtained by 2h pretreatment with 5% citric acid solution combined with electroporation with 15 pulses at 250 V/cm for 5 milliseconds (ms). Furthermore, a synergistic promoting effect on pDNA transfection was obtained by co-administration of CPP, the Tat peptide analog, and NLS, the NF-kappaB analog. These results indicate that effective DNA vaccination administered through the vaginal tract is possible by selecting the menstrual stage and overcoming the mucosal barrier using a combination of methods that promotes uptake.
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178
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Deng W, Yamaguchi H, Takashima Y, Harada A. Cover Picture: Construction of Chemical-Responsive Supramolecular Hydrogels from Guest-Modified Cyclodextrins (Chem. Asian J. 4/2008). Chem Asian J 2008. [DOI: 10.1002/asia.200890009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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179
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Deng W, Yamaguchi H, Takashima Y, Harada A. Construction of Chemical-Responsive Supramolecular Hydrogels from Guest-Modified Cyclodextrins. Chem Asian J 2008; 3:687-95. [DOI: 10.1002/asia.200700378] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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180
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Nishimura D, Oshikiri T, Takashima Y, Hashidzume A, Yamaguchi H, Harada A. Relative Rotational Motion between α-Cyclodextrin Derivatives and a Stiff Axle Molecule. J Org Chem 2008; 73:2496-502. [DOI: 10.1021/jo702237q] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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181
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Yamauchi K, Takashima Y, Hashidzume A, Yamaguchi H, Harada A. Switching between Supramolecular Dimer and Nonthreaded Supramolecular Self-Assembly of Stilbene Amide-α-Cyclodextrin by Photoirradiation. J Am Chem Soc 2008; 130:5024-5. [DOI: 10.1021/ja7113135] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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182
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Miyawaki A, Miyauchi M, Takashima Y, Yamaguchi H, Harada A. Formation of supramolecular isomers; poly[2]rotaxane and supramolecular assembly. Chem Commun (Camb) 2008:456-8. [DOI: 10.1039/b713588b] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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183
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Osaki M, Takashima Y, Yamaguchi H, Harada A. An Artificial Molecular Chaperone: Poly-pseudo-rotaxane with an Extensible Axle. J Am Chem Soc 2007; 129:14452-7. [DOI: 10.1021/ja075140o] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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184
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Kuad P, Miyawaki A, Takashima Y, Yamaguchi H, Harada A. External Stimulus-Responsive Supramolecular Structures Formed by a Stilbene Cyclodextrin Dimer. J Am Chem Soc 2007; 129:12630-1. [PMID: 17900191 DOI: 10.1021/ja075139p] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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185
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Deng W, Yamaguchi H, Takashima Y, Harada A. A chemical-responsive supramolecular hydrogel from modified cyclodextrins. Angew Chem Int Ed Engl 2007; 46:5144-7. [PMID: 17526038 DOI: 10.1002/anie.200701272] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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186
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Takashima Y, Senoura T, Yoshizaki T, Hamada S, Ito H, Matsui H. Differential chain-length specificities of two isoamylase-type starch-debranching enzymes from developing seeds of kidney bean. Biosci Biotechnol Biochem 2007; 71:2308-12. [PMID: 17827690 DOI: 10.1271/bbb.70215] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Plant isoamylase-type starch-debranching enzymes (ISAs) hydrolyze alpha-1,6-linkages in alpha-1,4/alpha-1,6-linked polyglucans. Two ISAs, designated PvISA1/2 and PvISA3, were purified from developing seeds of kidney bean by ammonium sulfate fractionation and several column chromatographic procedures. The enzymes displayed different substrate specificities for polyglucans: PvISA1/2 showed broad chain-length specificities, whereas PvISA3 liberated specific chains with a DP of 2 to 4.
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187
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Oshikiri T, Takashima Y, Yamaguchi H, Harada A. Face-Selective [2]- and [3]Rotaxanes: Kinetic Control of the Threading Direction of Cyclodextrins. Chemistry 2007; 13:7091-8. [PMID: 17563911 DOI: 10.1002/chem.200601657] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
New [2]- and [3]pseudorotaxanes containing alpha-cyclodextrin (alpha-CDs) molecules as rotors and alkyl pyridinium derivatives as axles were prepared by a slipping process. The inclusion behavior of these rotaxanes was investigated by using one- and two-dimensional NMR spectroscopy. The methyl group at the 2-position of the pyridinium moiety at the end of each axle molecule was found to control the rates of threading of the alpha-CD onto the axle molecules. alpha-CD can approach axle molecules from a particular direction to form inclusion complexes. Axle molecules that contain a 2-methylpyridinium moiety at one end and a bulky stopper at the other end can regulate the direction of approach to give a [2]pseudorotaxane such as 2 b-alpha-CD. A [3]pseudorotaxane in which two alpha-CD molecules are arranged facing in the same direction at two stations of the tetracationic axle molecule was also obtained. These face-selective behaviors are dominated by kinetic processes rather than thermodynamic processes.
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188
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Senoura T, Asao A, Takashima Y, Isono N, Hamada S, Ito H, Matsui H. Enzymatic characterization of starch synthase III from kidney bean (Phaseolus vulgaris L.). FEBS J 2007; 274:4550-60. [PMID: 17681016 DOI: 10.1111/j.1742-4658.2007.05984.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In plants and green algae, several starch synthase isozymes are responsible for the elongation of glucan chains in the biosynthesis of amylose and amylopectin. Multiple starch synthase isozymes, which are classified into five major classes (granule-bound starch synthases, SSI, SSII, SSIII, and SSIV) according to their primary sequences, have distinct enzymatic properties. All the starch synthase isozymes consist of a transit peptide, an N-terminal noncatalytic region (N-domain), and a C-terminal catalytic region (C-domain). To elucidate the enzymatic properties of kidney bean (Phaseolus vulgaris L.) SSIII and the function of the N-domain of kidney bean SSIII, three recombinant proteins were constructed: putative mature recombinant SSIII, recombinant kidney bean SSIII N-domain, and recombinant kidney bean SSIII C-domain. Purified recombinant kidney bean SSIII displayed high specific activities for primers as compared to the other starch synthase isozymes from kidney bean. Kinetic analysis showed that the high specific activities of recombinant kidney bean SSIII are attributable to the high k(cat) values, and that the K(m) values of recombinant kidney bean SSIII C-domain for primers were much higher than those of recombinant kidney bean recombinant SSIII. Recombinant kidney bean SSIII and recombinant kidney bean SSIII C-domain had similar chain-length specificities for the extension of glucan chains, indicating that the N-domain of kidney bean SSIII does not affect the chain-length specificity. Affinity gel electrophoresis indicated that recombinant kidney bean SSIII and recombinant kidney bean SSIII N-domain have high affinities for amylose and amylopectin. The data presented in this study provide direct evidence for the function of the N-domain of kidney bean SSIII as a carbohydrate-binding module.
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189
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Miyawaki A, Takashima Y, Yamaguchi H, Harada A. Supramolecular Polymers Formed by Bifunctional Cyclodextrin Derivatives. CHEM LETT 2007. [DOI: 10.1246/cl.2007.828] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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190
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Deng W, Yamaguchi H, Takashima Y, Harada A. A Chemical-Responsive Supramolecular Hydrogel from Modified Cyclodextrins. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701272] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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191
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Inoue Y, Kuad P, Okumura Y, Takashima Y, Yamaguchi H, Harada A. Thermal and photochemical switching of conformation of poly(ethylene glycol)-substituted cyclodextrin with an azobenzene group at the chain end. J Am Chem Soc 2007; 129:6396-7. [PMID: 17461590 DOI: 10.1021/ja071717q] [Citation(s) in RCA: 137] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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192
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Maruoka N, Murata T, Omata N, Takashima Y, Fujibayashi Y, Wada Y. Topological and chronological features of the impairment of glucose metabolism induced by 1-methyl-4-phenylpyridinium ion (MPP+) in rat brain slices. J Neural Transm (Vienna) 2007; 114:1155-9. [PMID: 17431733 DOI: 10.1007/s00702-007-0720-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2005] [Accepted: 03/07/2007] [Indexed: 11/30/2022]
Abstract
1-Methyl-4-phenylpyridinium (MPP(+)) was added directly to fresh rat brain slices and the dynamic changes in the cerebral glucose metabolic rate (CMRglc) were serially and two-dimensionally measured with [(18)F]2-fluoro-2-deoxy-D-glucose as a tracer. MPP(+) dose-dependently increased CMRglc, reflecting enhanced glycolysis compensating for the decrease in aerobic metabolism. While the CMRglc enhancement induced by MPP(+) (<10 microM) was restricted to the striatum, MPP(+) (>or=10 microM) induced a significant CMRglc enhancement in all brain regions. MPP(+) at high concentration (1 mM) eventually initiated rapid metabolic collapse, with failure to sustain anaerobic glycolysis.
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193
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Inoue Y, Miyauchi M, Nakajima H, Takashima Y, Yamaguchi H, Harada A. Self-Threading and Dethreading Dynamics of Poly(ethylene glycol)-Substituted Cyclodextrins with Different Chain Lengths. Macromolecules 2007. [DOI: 10.1021/ma070095q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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194
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Ogoshi T, Takashima Y, Yamaguchi H, Harada A. Chemically-Responsive Sol−Gel Transition of Supramolecular Single-Walled Carbon Nanotubes (SWNTs) Hydrogel Made by Hybrids of SWNTs and Cyclodextrins. J Am Chem Soc 2007; 129:4878-9. [PMID: 17394324 DOI: 10.1021/ja070457+] [Citation(s) in RCA: 231] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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195
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Osaki M, Takashima Y, Yamaguchi H, Harada A. Polymerization of Lactones Initiated by Cyclodextrins: Effects of Cyclodextrins on the Initiation and Propagation Reactions. Macromolecules 2007. [DOI: 10.1021/ma062650e] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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196
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Tsukagoshi S, Miyawaki A, Takashima Y, Yamaguchi H, Harada A. Contraction of Supramolecular Double-Threaded Dimer Formed by α-Cyclodextrin with a Long Alkyl Chain. Org Lett 2007; 9:1053-5. [PMID: 17309271 DOI: 10.1021/ol063078e] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A double-threaded dimer bearing a long substituent part and a large stopper group has been prepared and showed a conformational change with increased solvent polarity. [structure: see text]
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197
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Sakamoto K, Takashima Y, Yamaguchi H, Harada A. Preparation and Properties of Rotaxanes Formed by Dimethyl-β-cyclodextrin and Oligo(thiophene)s with β-Cyclodextrin Stoppers. J Org Chem 2006; 72:459-65. [PMID: 17221962 DOI: 10.1021/jo061834o] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel cyclodextrin rotaxanes with oligothiophene as an axis molecule have been prepared by the Suzuki coupling reaction of 6-O-(4-iodophenyl)-beta-CD (6-I-Ph-beta-CD) with di(1,3,2-dioxaborolan-2-yl)-oligothiophene (oligothiophene diboric ethylene glycol esters) in aqueous solutions of dimethyl-beta-cyclodextrin (DM-beta-CD). These reactions gave [2]rotaxanes and [3]rotaxanes, which were isolated by reversed phase chromatography. The fluorescence intensities of rotaxanes are higher than those of dumbbell-shaped molecules (without DM-beta-CD) in aqueous solutions. The inclusion ratio and chain length of rotaxanes have been found to relate to the emission properties and emission intensities of oligothiophene. In aqueous solutions, fluorescence quantum yields of rotaxanes are higher than those of dumbbell-shaped molecules. The increase in the fluorescence efficiency of rotaxane is caused by suppression of intermolecular interactions, indicating the effect of insulated oligothiophene with DM-beta-CD. beta-CD at the both ends of rotaxanes functions not only as bulky stoppers but also as the recognition site for guest molecules, as verified by fluorescence quenching experiments.
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198
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Takashima Y, Nakayama Y, Hashiguchi M, Hosoda T, Yasuda H, Hirao T, Harada A. Syntheses of group 4 transition metal complexes bearing 2-pyridinethiolate ligands and their catalytic activities for ethylene polymerization. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.06.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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199
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Inoue Y, Miyauchi M, Nakajima H, Takashima Y, Yamaguchi H, Harada A. Self-Threading of a Poly(ethylene glycol) Chain in a Cyclodextrin-Ring: Control of the Exchange Dynamics by Chain Length. J Am Chem Soc 2006; 128:8994-5. [PMID: 16834347 DOI: 10.1021/ja061095t] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Poly(ethylene glycol) (PEG)-substituted cyclodextrins (CDs) with different chain lengths have been synthesized. PEG-substituted CDs formed self-threading complexes in aqueous solutions, and the conformational exchange dynamics between self-threading and dethreading could be regulated by its chain length.
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200
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Takahashi H, Takashima Y, Yamaguchi H, Harada A. Selection between Pinching-Type and Supramolecular Polymer-Type Complexes by α-Cyclodextrin−β-Cyclodextrin Hetero-Dimer and Hetero-Cinnamamide Guest Dimers. J Org Chem 2006; 71:4878-83. [PMID: 16776516 DOI: 10.1021/jo0604686] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Novel supramolecular complexes have been prepared from an alpha-cyclodextrin-beta-cyclodextrin hetero-dimer (alpha-CD-beta-CD hetero-dimer) and hetero-cinnamamide guest dimers, G-t-Boc and G-NH2, having adamantyl groups in aqueous solutions. On addition of the competitive guest, the supramolecular structure formed by a mixture of the alpha-CD-beta-CD hetero-dimer and G-t-Boc was found to be different from that of a mixture of the alpha-CD-beta-CD hetero-dimer and G-NH2 by the 1H NMR spectroscopy, the ROESY NMR spectroscopy, and the circular dichroism spectroscopy. The size of the supramolecular complex from the mixture of the alpha-CD-beta-CD hetero-dimer and G-NH2 is larger than that from the mixture of the alpha-CD-beta-CD hetero-dimer and G-t-Boc, which was proved by the pulse field gradient spin-echo NMR and the atomic force microscopy. These results suggest that the mixture of the alpha-CD-beta-CD hetero-dimer and G-t-Boc formed a pinching-type complex, and the mixture of the alpha-CD-beta-CD hetero-dimer and G-NH2 formed a supramolecular polymer-type complex.
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