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Zhang L, Kamitakahara H, Takano T, Morimoto T, Sakamoto S, Mitsuda N, Itai A. Stone cell formation in the pedicel of pears and apples. Planta 2023; 258:85. [PMID: 37747516 DOI: 10.1007/s00425-023-04240-x] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 09/13/2023] [Indexed: 09/26/2023]
Abstract
MAIN CONCLUSION For the first time, stone cells in pear and apple pedicel were studied. The lignification of the pedicel outer part was correlated with flesh, and the secondary cell wall biosynthesis genes were activated. Fruit pedicels act as bridges between the fruit and the shoot. They have secondary thickened cell walls that presumably function in mechanical support, water and nutrient transport. Stone cells are cells with a secondary cell wall thickening. In pears, yet not in apples, the stone cells affect the flesh texture. There have been few reports on stone cell formation in pear and apple pedicels; therefore, we studied these cells for the first time. The apple pedicel had few stone cells in the cortex. The formation of stone cells in pear continued until seven weeks after flowering (WAF), and the density was significantly higher than in apple. The stone cell formation degree (SFD) of pear was 3.6-7.1 times higher than that of apple. Total lignin and lignin non-condensed structure (G and S units) content in the pear pedicle outer part was 1.5-2.7 times higher than that of the apple at harvest. The SFD of the pedicel outer part had a positive correlation with the G and S units content of the flesh. The total lignin and G and S units content between flesh and the pedicel outer part were positively correlated. Correlation analysis revealed a positive relationship between fruit and pedicel formation of the stone cells. The WGCNA showed that NST3 was linked to NAC028, MYB46, CESA, POD, LAC, and VSR6. These genes were highly expressed in the outer part of the pear pedicel, while they were suppressed in that issue of the apple at 4 WAF.
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Affiliation(s)
- Lumin Zhang
- Tropical Eco-Agriculture Research Institute, Yunnan Academy of Agricultural Sciences, Nancheng Street 150, Yuanmou, 651300, Yunnan, China
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8566, Japan
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kitaina-Yazuma Oji 74, Seika-Cho, Soraku-Gun, Kyoto, 619-0244, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-Ku, Kyoto, 606-8502, Japan
| | - Toshiyuki Takano
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-Ku, Kyoto, 606-8502, Japan
| | - Takuya Morimoto
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kitaina-Yazuma Oji 74, Seika-Cho, Soraku-Gun, Kyoto, 619-0244, Japan
| | - Shingo Sakamoto
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8566, Japan
| | - Nobutaka Mitsuda
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8566, Japan
| | - Akihiro Itai
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kitaina-Yazuma Oji 74, Seika-Cho, Soraku-Gun, Kyoto, 619-0244, Japan.
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Nishio Y, Nada T, Hirata T, Fujita S, Sugimura K, Kamitakahara H. Handedness Inversion in Chiral Nematic (Ethyl)cellulose Solutions: Effects of Substituents and Temperature. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yoshiyuki Nishio
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takayuki Nada
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takuma Hirata
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shinpei Fujita
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kazuki Sugimura
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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Dhar P, Sugimura K, Yoshioka M, Yoshinaga A, Kamitakahara H. Synthesis-property-performance relationships of multifunctional bacterial cellulose composites fermented in situ alkali lignin medium. Carbohydr Polym 2021; 252:117114. [PMID: 33183586 DOI: 10.1016/j.carbpol.2020.117114] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/23/2020] [Accepted: 09/04/2020] [Indexed: 11/15/2022]
Abstract
This work demonstrates a unique approach of utilizing alkali lignin (AL), as smart additive to in situ BC fermentation in which it concurrently acts as promoter to microbial growth as well as reinforcing filler for fabrication of multifunctional composites. Traditionally, BC fermentation is accompanied by inhibitor formation with sudden drop in pH leading to low yield and biomass growth. AL due to its antioxidant nature prevents formation of gluconic acid as byproduct, at ∼0.25 wt.% AL based on inhibitory byproduct kinetics. Interestingly, AL self-assembles to form primary and secondary structures in BC pores, resulting in simultaneous improvement in thermal stability as well as toughness. The BC/AL films show strong UV-blocking capacity with prolonged radical scavenging activity and preventing browning of freshly cut apples making it suitable as food packaging. Therefore, present work opens up new avenues for fabrication of high-performance BC-based composites through selection of smart materials which can simultaneously improve BC bioprocessing.
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Affiliation(s)
- Prodyut Dhar
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Kazuki Sugimura
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Mariko Yoshioka
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Arata Yoshinaga
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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Miyagawa Y, Tobimatsu Y, Lam PY, Mizukami T, Sakurai S, Kamitakahara H, Takano T. Possible mechanisms for the generation of phenyl glycoside-type lignin-carbohydrate linkages in lignification with monolignol glucosides. Plant J 2020; 104:156-170. [PMID: 32623768 DOI: 10.1111/tpj.14913] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 06/17/2020] [Accepted: 06/24/2020] [Indexed: 06/11/2023]
Abstract
The existence and formation of covalent lignin-carbohydrate (LC) linkages in plant cell walls has long been a matter of debate in terms of their roles in cell wall development and biomass use. Of the various putative LC linkages proposed to date, evidence of the native existence and formation mechanism of phenyl glycoside (PG)-type LC linkages in planta is particularly scarce. The present study aimed to explore previously overlooked mechanisms for the formation of PG-type LC linkages through the incorporation of monolignol glucosides, which are possible lignin precursors, into lignin polymers during lignification. Peroxidase-catalyzed lignin polymerization of coniferyl alcohol in the presence of coniferin and syringin in vitro resulted in the generation of PG-type LC linkages in synthetic lignin polymers, possibly via nucleophilic addition onto quinone methide (QM) intermediates formed during polymerization. Biomimetic lignin polymerization of coniferin via the β-glucosidase/peroxidase system also resulted in the generation of PG-type as well as alkyl glycoside-type LC linkages. This occurred via non-enzymatic QM-involving reactions and also via enzymatic transglycosylations involving β-glucosidase, which was demonstrated by in-depth structural analysis of the synthetic lignins by two-dimensional NMR. We collected heteronuclear single-quantum coherence (HSQC) NMR for native cell wall fractions prepared from pine (Pinus taeda), eucalyptus (Eucalyptus camaldulensis), acacia (Acacia mangium), poplar (Populus × eurarnericana) and bamboo (Phyllostachys edulis) wood samples, which exhibited correlations, albeit at low levels, that were well matched with those of the PG-type LC linkages in synthetic lignins incorporating monolignol glucosides. Overall, our results provide a molecular basis for feasible mechanisms for the generation of PG-type LC linkages from monolignol glucosides and further substantiates their existence in planta.
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Affiliation(s)
- Yasuyuki Miyagawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Kyoto, 606-8502, Japan
| | - Yuki Tobimatsu
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Kyoto, 606-8502, Japan
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Pui Ying Lam
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Takahito Mizukami
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Kyoto, 606-8502, Japan
| | - Sayaka Sakurai
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Kyoto, 606-8502, Japan
| | - Hiroshi Kamitakahara
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Kyoto, 606-8502, Japan
| | - Toshiyuki Takano
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Kyoto, 606-8502, Japan
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Shibano M, Ochiai H, Suzuki K, Kamitakahara H, Kaji H, Takano T. Thermally Activated Delayed Fluorescence Benzyl Cellulose Derivatives for Nondoped Organic Light-Emitting Diodes. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02644] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Masaya Shibano
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroki Ochiai
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Katsuaki Suzuki
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hironori Kaji
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Toshiyuki Takano
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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Zhang L, Kamitakahara H, Murayama H, Ohsako T, Itai A. Analysis of Fruit Lignin Content, Composition, and Linkage Types in Pear Cultivars and Related Species. J Agric Food Chem 2020; 68:2493-2505. [PMID: 31976665 DOI: 10.1021/acs.jafc.9b07396] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Lignin content, composition, and linkage types were investigated in pear fruit cultivars and related species. Lignin content increased during early stages and then decreased toward ripening in the core and flesh of "Gold Nijisseiki" and "Alexandrine Douillard". The lignin content was highest at harvest in Chinese quince. Only trace amounts of lignin were detected in apple flesh. The lignin content was low in Japanese pears "Ohshu", "Hosui", and "Kosui", and the noncondensed lignin index was high in flesh. The lignin type was guaiacyl-syringyl (GS) in these pears and related species. The S/G ratio at harvest varied widely (0.75-2.64) and increased during early stages and remained constant toward harvest in "Gold Nijisseiki" and "Alexandrine Douillard". "Gold Nijisseiki" and "Alexandrine Douillard" were determined to be G- and S-lignin-rich types, respectively. β-Aryl ether, phenylcoumaran, and resinol interunit linkage types were detected among monolignol bonds, and β-Aryl ether units were the main linkages in the pear.
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Affiliation(s)
- Lumin Zhang
- Graduate School of Life and Environmental Sciences , Kyoto Prefectural University , Kitaina-Yazuma Oji 74 , Seika-cho, Soraku-gun, Kyoto 619-0244 , Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture , Kyoto University , Kitashirakawa Oiwake-cho , Sakyo-ku, Kyoto 606-8502 , Japan
| | - Hideki Murayama
- Faculty of Agriculture , Yamagata University , Wakabamachi 1-23 , Tsuruoka 997-8555 , Japan
| | - Takanori Ohsako
- Graduate School of Life and Environmental Sciences , Kyoto Prefectural University , Kitaina-Yazuma Oji 74 , Seika-cho, Soraku-gun, Kyoto 619-0244 , Japan
| | - Akihiro Itai
- Graduate School of Life and Environmental Sciences , Kyoto Prefectural University , Kitaina-Yazuma Oji 74 , Seika-cho, Soraku-gun, Kyoto 619-0244 , Japan
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Shibano M, Karakawa M, Kamitakahara H, Takano T. Preparation and electro-optical properties of triphenylamine-bound chitosan derivative. Int J Biol Macromol 2019; 126:1112-1115. [PMID: 30584931 DOI: 10.1016/j.ijbiomac.2018.12.194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/15/2018] [Accepted: 12/21/2018] [Indexed: 11/18/2022]
Abstract
3,6-Di-O-hexanoyl-N-[4-(N,N-diphenylamino)-1-phenyl] thiocarbamoyl chitosan was prepared from 3,6-di-O-hexanoyl chitosan isothiocyanate in a 78% yield, and spin-coated films of the chitosan derivative and tris(2-phenylpyridine)iridium (Ir(ppy)3) were fabricated. Ultraviolet-visible absorption spectra and photoluminescence spectra of the films indicated efficient Förster energy transfer from the chitosan derivative to the Ir(ppy)3. An electroluminescent device using both compounds emitted green luminescence when voltage was applied. The results suggested that the regio-selectively substituted chitosan derivative could be used as a scaffold in the emitting layer of organic light emitting diode.
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Affiliation(s)
- Masaya Shibano
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Makoto Karakawa
- Institute for Frontier Science Initiative, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Toshiyuki Takano
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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8
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Kamitakahara H, Okayama T, Agusta A, Tobimatsu Y, Takano T. Two-dimensional NMR analysis of Angiopteris evecta rhizome and improved extraction method for angiopteroside. Phytochem Anal 2019; 30:95-100. [PMID: 30255625 DOI: 10.1002/pca.2794] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/26/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION The rhizome of Angiopteris evecta is of academic interest in Kalimantan, Indonesia, from an ethnobotanical perspective. Angiopteroside is a substance of pharmaceutical importance that is found in the rhizome of A. evecta. OBJECTIVE The aims of this research are to improve the extraction method for angiopteroside from the rhizome, compared to that in a previous report, and to determine the yield of angiopteroside from the rhizome of A. evecta, as well as to obtain precise data for extractives from the rhizome of A. evecta by using two-dimensional NMR spectroscopy and liquid chromatography-mass spectrometry (LC-MS). METHODOLOGY We investigated the chemical constituents of the whole rhizome by means of two-dimensional NMR (heteronuclear single quantum coherence or HSQC) spectroscopy, neutral sugar analysis using the alditol acetate method, and lignin analysis using alkaline nitrobenzene oxidation and Klason lignin methods. LC-MS revealed the purity of the angiopteroside. Antimicrobial assays were also performed for the purified angiopteroside by using a broth microdilution method. RESULTS Angiopteroside was isolated by Soxhlet extraction with aqueous acetone followed by preparative thin-layer chromatography (eluent: 20% methanol/dichloromethane). LC-MS revealed that angiopteroside can be found in the rhizome of A. evecta in 9.9% yield, which is an extremely high yield for a plant extractive. CONCLUSION HSQC analysis is a powerful tool for surveying compounds in plant materials, such as the whole rhizome of A. evecta. Soxhlet extraction with aqueous acetone is an effective method for extracting glycosides from plant materials.
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Affiliation(s)
| | - Tomoki Okayama
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Andria Agusta
- Research Center for Biology, Indonesian Institute of Sciences, Cibinong, West Java, Indonesia
| | - Yuki Tobimatsu
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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Tanaka Y, Murata-Hirai K, Iwasaki M, Matsumoto K, Hayashi K, Kumagai A, Nada MH, Wang H, Kobayashi H, Kamitakahara H, Okamura H, Sugie T, Minato N, Toi M, Morita CT. Expansion of human γδ T cells for adoptive immunotherapy using a bisphosphonate prodrug. Cancer Sci 2018; 109:587-599. [PMID: 29288540 PMCID: PMC5834800 DOI: 10.1111/cas.13491] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/20/2017] [Accepted: 12/25/2017] [Indexed: 12/27/2022] Open
Abstract
Cancer immunotherapy with human γδ T cells expressing Vγ2Vδ2 T cell receptor (also termed Vγ9Vδ2) has shown promise because of their ability to recognize and kill most types of tumors in a major histocombatibility complex (MHC) ‐unrestricted fashion that is independent of the number of tumor mutations. In clinical trials, adoptive transfer of Vγ2Vδ2 T cells has been shown to be safe and does not require preconditioning. In this report, we describe a method for preparing highly enriched human Vγ2Vδ2 T cells using the bisphosphonate prodrug, tetrakis‐pivaloyloxymethyl 2‐(thiazole‐2‐ylamino)ethylidene‐1,1‐bisphosphonate (PTA). PTA stimulated the expansion of Vγ2Vδ2 cells to purities up to 99%. These levels were consistently higher than those observed after expansion with zoledronic acid, the most commonly used stimulator for clinical trials. Cell numbers also averaged more than those obtained with zoledronic acid and the expanded Vγ2Vδ2 cells exhibited high cytotoxicity against tumor cells. The high purity of Vγ2Vδ2 cells expanded by PTA increased engraftment success in immunodeficient NOG mice. Even low levels of contaminating αβ T cells resulted in some mice with circulating human αβ T cells rather than Vγ2Vδ2 cells. Vγ2Vδ2 cells from engrafted NOG mice upregulated CD25 and secreted tumor necrosis factor‐α and interferon‐γ in response to PTA‐treated tumor cells. Thus, PTA expands Vγ2Vδ2 T cells to higher purity than zoledronic acid. The high purities allow the successful engraftment of immunodeficient mice without further purification and may speed up the development of allogeneic Vγ2Vδ2 T cell therapies derived from HLA‐matched normal donors for patients with poor autologous Vγ2Vδ2 T cell responses.
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Affiliation(s)
- Yoshimasa Tanaka
- Center for Innovation in Immunoregulative Technology and Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Immunology and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Center for Bioinformatics and Molecular Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Kaoru Murata-Hirai
- Center for Innovation in Immunoregulative Technology and Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masashi Iwasaki
- Center for Innovation in Immunoregulative Technology and Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kenji Matsumoto
- Center for Innovation in Immunoregulative Technology and Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kosuke Hayashi
- Center for Innovation in Immunoregulative Technology and Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Asuka Kumagai
- Center for Bioinformatics and Molecular Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Mohanad H Nada
- Department of Internal Medicine and the Interdisciplinary Graduate Program in Immunology, University of Iowa Carver College of Medicine, Iowa City Veterans Affairs Health Care System, Iowa City, IA, USA
| | - Hong Wang
- Department of Internal Medicine and the Interdisciplinary Graduate Program in Immunology, University of Iowa Carver College of Medicine, Iowa City Veterans Affairs Health Care System, Iowa City, IA, USA
| | - Hirohito Kobayashi
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan
| | - Hiroshi Kamitakahara
- Department of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Haruki Okamura
- Department of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Tomoharu Sugie
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Nagahiro Minato
- Department of Immunology and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masakazu Toi
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Craig T Morita
- Department of Internal Medicine and the Interdisciplinary Graduate Program in Immunology, University of Iowa Carver College of Medicine, Iowa City Veterans Affairs Health Care System, Iowa City, IA, USA
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Yamagami M, Kamitakahara H, Yoshinaga A, Takano T. Thermo-reversible supramolecular hydrogels of trehalose-type diblock methylcellulose analogues. Carbohydr Polym 2017; 183:110-122. [PMID: 29352866 DOI: 10.1016/j.carbpol.2017.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 11/24/2017] [Accepted: 12/05/2017] [Indexed: 10/18/2022]
Abstract
This paper describes the design and synthesis of new trehalose-type diblock methylcellulose analogues with nonionic, cationic, and anionic cellobiosyl segments, namely 1-(tri-O-methyl-cellulosyl)-4-[β-d-glucopyranosyl-(1→4)-β-d-glucopyranosyloxymethyl]-1H-1,2,3-triazole (1), 1-(tri-O-methyl-cellulosyl)-4-[(6-amino-6-deoxy-β-d-glucopyranosyl)-(1→4)- 6-amino-6-deoxy-β-d-glucopyranosyloxymethyl]-1H-1,2,3-triazole (2), and 4-(tri-O-methyl-cellulosyloxymethyl)-1-[β-d-glucopyranuronosyl-(1→4)-β-d-glucopyranuronosyl]-1H-1,2,3-triazole (3), respectively. Aqueous solutions of all of the 1,2,3-triazole-linked diblock methylcellulose analogues possessed higher surface activities than that of industrially produced methylcellulose and exhibited lower critical solution temperatures, that allowed the formation of thermoresponsive supramolecular hydrogels at close to human body temperature. Supramolecular structures of thermo-reversible hydrogels based on compounds 1, 2, and 3 were investigated by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Detailed structure-property-function relationships of compounds 1, 2, and 3 were discussed. Not only nonionic hydrophilic segment but also ionic hydrophilic segments of diblock methylcellulose analogues were valid for the formation of thermo-reversible supramolecular hydrogels based on end-functionalized methylcellulose.
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Affiliation(s)
- Mao Yamagami
- Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Kamitakahara
- Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Arata Yoshinaga
- Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Toshiyuki Takano
- Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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11
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Teruya K, Oguma A, Nishizawa K, Kamitakahara H, Doh-ura K. Pyrene conjugation and spectroscopic analysis of hydroxypropyl methylcellulose compounds successfully demonstrated a local dielectric difference associated with in vivo anti-prion activity. PLoS One 2017; 12:e0185357. [PMID: 28934337 PMCID: PMC5608368 DOI: 10.1371/journal.pone.0185357] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 09/11/2017] [Indexed: 11/18/2022] Open
Abstract
Our previous study on prion-infected rodents revealed that hydroxypropyl methylcellulose compounds (HPMCs) with different molecular weights but similar composition and degree of substitution have different levels of long-lasting anti-prion activity. In this study, we searched these HPMCs for a parameter specifically associated with in vivo anti-prion activity by analyzing in vitro chemical properties and in vivo tissue distributions. Infrared spectroscopic and thermal analyses revealed no differences among HPMCs, whereas pyrene conjugation and spectroscopic analysis revealed that the fluorescence intensity ratio of peak III/peak I correlated with anti-prion activity. This correlation was more clearly demonstrated in the anti-prion activity of the 1-year pre-infection treatment than that of the immediate post-infection treatment. In addition, the intensity ratio of peak III/peak I negatively correlated with the macrophage uptake level of HPMCs in our previous study. However, the in vivo distribution pattern was apparently not associated with anti-prion activity and was different in the representative tissues. These findings suggest that pyrene conjugation and spectroscopic analysis are powerful methods to successfully demonstrate local dielectric differences in HPMCs and provide a feasible parameter denoting the long-lasting anti-prion activity of HPMCs in vivo.
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Affiliation(s)
- Kenta Teruya
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Ayumi Oguma
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Keiko Nishizawa
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Kyoto University Graduate School of Agriculture, Kyoto, Kyoto, Japan
| | - Katsumi Doh-ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
- * E-mail:
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Teruya K, Oguma A, Nishizawa K, Kawata M, Sakasegawa Y, Kamitakahara H, Doh-ura K. A Single Subcutaneous Injection of Cellulose Ethers Administered Long before Infection Confers Sustained Protection against Prion Diseases in Rodents. PLoS Pathog 2016; 12:e1006045. [PMID: 27973536 PMCID: PMC5156379 DOI: 10.1371/journal.ppat.1006045] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 11/07/2016] [Indexed: 02/04/2023] Open
Abstract
Prion diseases are fatal, progressive, neurodegenerative diseases caused by prion accumulation in the brain and lymphoreticular system. Here we report that a single subcutaneous injection of cellulose ethers (CEs), which are commonly used as inactive ingredients in foods and pharmaceuticals, markedly prolonged the lives of mice and hamsters intracerebrally or intraperitoneally infected with the 263K hamster prion. CEs provided sustained protection even when a single injection was given as long as one year before infection. These effects were linked with persistent residues of CEs in various tissues. More effective CEs had less macrophage uptake ratios and hydrophobic modification of CEs abolished the effectiveness. CEs were significantly effective in other prion disease animal models; however, the effects were less remarkable than those observed in the 263K prion-infected animals. The genetic background of the animal model was suggested to influence the effects of CEs. CEs did not modify prion protein expression but inhibited abnormal prion protein formation in vitro and in prion-infected cells. Although the mechanism of CEs in vivo remains to be solved, these findings suggest that they aid in elucidating disease susceptibility and preventing prion diseases. Prion diseases are progressive, fatal, neurodegenerative transmissible illnesses in humans and animals caused by prion accumulation in the brain and lymphoreticular system. Because they are prevalent in nature, with atypical forms continuing to emerge, prion diseases are potential threats to both public health and the economy. However, there are no effective methods to prevent these diseases. Here we report that cellulose ethers (CEs), which are non-digestible water-soluble polysaccharides that are commonly used as inactive ingredients in foods and pharmaceuticals, show prophylactic efficacy in prion-infected animals. CEs persist in various tissues and confer sustained preventive efficacy for years, suggesting that they help to prevent prion diseases. Although the enteral absorption of CEs is limited, we found that a portion of the absorbed CEs influences disease progression. Therefore, CEs may be useful to assess disease susceptibility and prevent disease occurrence.
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Affiliation(s)
- Kenta Teruya
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Ayumi Oguma
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Keiko Nishizawa
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Maki Kawata
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Yuji Sakasegawa
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Katsumi Doh-ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
- * E-mail:
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Yoshinaga A, Kamitakahara H, Takabe K. Distribution of coniferin in differentiating normal and compression woods using MALDI mass spectrometric imaging coupled with osmium tetroxide vapor treatment. Tree Physiol 2016; 36:643-52. [PMID: 26507270 PMCID: PMC4886284 DOI: 10.1093/treephys/tpv116] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 10/02/2015] [Indexed: 05/25/2023]
Abstract
Matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) was employed to detect monolignol glucosides in differentiating normal and compression woods of two Japanese softwoods, Chamaecyparis obtusa and Cryptomeria japonica Comparison of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry collision-induced dissociation fragmentation analysis and structural time-of-flight (MALDI-TOF CID-FAST) spectra between coniferin and differentiating xylem also confirmed the presence of coniferin in differentiating xylem. However, as matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and MALDI-TOF CID-FAST spectra of sucrose were similar to those of coniferin, it was difficult to distinguish the distribution of coniferin and sucrose using MALDI-MSI and collision-induced dissociation measurement only. To solve this problem, osmium tetroxide vapor was applied to sections of differentiating xylem. This vapor treatment caused peak shifts corresponding to the introduction of two hydroxyl groups to the C=C double bond in coniferin. The treatment did not cause a peak shift for sucrose, and therefore was effective in distinguishing coniferin and sucrose. Thus, it was found that MALDI-MSI combined with osmium tetroxide vapor treatment is a useful method to detect coniferin in differentiating xylem.
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Affiliation(s)
- Arata Yoshinaga
- Laboratory of Tree Cell Biology, Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Kamitakahara
- Laboratory of The Chemistry of Biomaterials, Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Keiji Takabe
- Laboratory of Tree Cell Biology, Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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Saito Y, Kamitakahara H, Takano T. Preparation of a squaraine-bounded cellulose derivative for photocurrent generation system. Carbohydr Res 2016; 421:40-45. [DOI: 10.1016/j.carres.2015.12.002] [Citation(s) in RCA: 5] [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] [Received: 07/31/2015] [Revised: 10/29/2015] [Accepted: 12/03/2015] [Indexed: 10/22/2022]
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Shibano M, Nishida S, Saito Y, Kamitakahara H, Takano T. Facile synthesis of acyl chitosan isothiocyanates and their application to porphyrin-appended chitosan derivative. Carbohydr Polym 2014; 113:279-85. [DOI: 10.1016/j.carbpol.2014.05.099] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 05/21/2014] [Accepted: 05/30/2014] [Indexed: 10/25/2022]
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16
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Shibano M, Kamitakahara H, Takano T. Tandem Staudinger/aza-Wittig reaction of 6-azido-6-deoxycellulose derivative. Carbohydr Res 2013; 382:25-9. [DOI: 10.1016/j.carres.2013.09.010] [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] [Received: 08/29/2013] [Revised: 09/26/2013] [Accepted: 09/27/2013] [Indexed: 11/29/2022]
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17
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Shiraishi T, Sannami Y, Kamitakahara H, Takano T. Comparison of a series of laccase mediators in the electro-oxidation reactions of non-phenolic lignin model compounds. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.112] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Kiyoto S, Yoshinaga A, Tanaka N, Wada M, Kamitakahara H, Takabe K. Immunolocalization of 8-5' and 8-8' linked structures of lignin in cell walls of Chamaecyparis obtusa using monoclonal antibodies. Planta 2013; 237:705-15. [PMID: 23108661 DOI: 10.1007/s00425-012-1784-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 10/11/2012] [Indexed: 05/24/2023]
Abstract
Mouse monoclonal antibodies were generated against dehydrodiconiferyl alcohol- or pinoresinol-p-aminohippuric acid (pAHA)-bovine serum albumin (BSA) conjugate as probes that specifically react with 8-5' or 8-8' linked structure of lignin in plant cell walls. Hybridoma clones were selected that produced antibodies that positively reacted with dehydrodiconiferyl alcohol- or pinoresinol-pAHA-BSA and negatively reacted with pAHA-BSA and guaiacylglycerol-beta-guaiacyl ether-pAHA-BSA conjugates containing 8-O-4' linkage. Eight clones were established for each antigen and one of each clone that positively reacted with wood sections was selected. The specificity of these antibodies was examined by competitive ELISA tests using various lignin dimers with different linkages. The anti-dehydrodiconiferyl alcohol antibody reacted specifically with dehydrodiconiferyl alcohol and did not react with other model compounds containing 8-O-4', 8-8', or 5-5' linkages. The anti-pinoresinol antibody reacted specifically with pinoresinol and syringaresinol and did not react with the other model compounds containing 8-O-4', 8-5', or 5-5' linkages. The antibodies also did not react with dehydrodiconiferyl alcohol acetate or pinoresinol acetate, indicating that the presence of free phenolic or aliphatic hydroxyl group was an important factor in their reactivity. In sections of Japanese cypress (Chamaecyparis obtusa), labeling by the anti-dehydrodiconiferyl alcohol antibody was found in the secondary walls of phloem fibers and in the compound middle lamellae, and secondary walls of tracheids. Weak labeling by the anti-pinoresinol antibody was found in secondary walls of phloem fibers and secondary walls and compound middle lamellae of developed tracheids. These labelings show the localization of 8-5' and 8-8' linked structure of lignin in the cell walls.
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Affiliation(s)
- Shingo Kiyoto
- Laboratory of Tree Cell Biology, Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan
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Nakagawa A, Steiniger F, Richter W, Koschella A, Heinze T, Kamitakahara H. Thermoresponsive hydrogel of diblock methylcellulose: formation of ribbonlike supramolecular nanostructures by self-assembly. Langmuir 2012; 28:12609-12618. [PMID: 22852550 DOI: 10.1021/la3026528] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This article provides detailed insight into the thermoresponsive gelation mechanism of industrially produced methylcellulose (MC), highlighting the importance of diblock structure with a hydrophobic sequence of 2,3,6-tri-O-methyl-glucopyranosyl units for this physicochemical property. We show herein, for the first time, that well-defined diblock MC self-assembles thermoresponsively into ribbonlike nanostructures in water. A cryogenic transmission electron microscopy (cryo-TEM) technique was used to detect the ribbonlike nanostructures formed by the diblock copolymers consisting of hydrophilic glucosyl or cellobiosyl and hydrophobic 2,3,6-tri-O-methyl-cellulosyl blocks, methyl β-D-glucopyranosyl-(1→4)-2,3,6-tri-O-methyl-celluloside 1 (G-236MC, DP(n) = 10.7, DS = 2.65), and methyl β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyl-(1→4)-2,3,6-tri-O-methyl-celluloside 2 (GG-236MC, DP(n) = 28.2, DS = 2.75). Rheological measurements revealed that the gel strength of a dispersion of GG-236MC (2, 2.0 wt %) in water at 70 °C was 3.0 times stronger than that of commercial MC SM-8000, although the molecular weight of GG-236MC (2) having M(w) = 8 × 10(3) g/mol was 50 times smaller than that of SM-8000 having M(w) = 4 × 10(5) g/mol. Cryo-TEM observation suggested that the hydrogel formation of the diblock copolymers could be attributed to the entanglement of ribbonlike nanostructures self-assembled by the diblock copolymers in water. The cryo-TEM micrograph of GG-236MC (2) at 5 °C showed rectangularly shaped nanostructures having a thickness from 11 to 24 nm, although G-236MC (1) at 20 °C showed no distinct self-assembled nanostructures. The ribbonlike nanostructures of GG-236MC (2) having a length ranging from 91 to 864 nm and a thickness from 8.5 to 27.1 nm were detected above 20 °C. Small-angle X-ray scattering measurements suggested that the ribbonlike nanostructures of GG-236MC (2) consisted of a bilayer structure with a width of ca. 40 nm. It was likely that GG-236MC (2) molecules were oriented perpendicularly to the long axis of the ribbonlike nanostructure. In addition, wide-angle X-ray scattering measurements revealed that GG-236MC (2) in its hydrogel formed the same crystalline regions as 2,3,6-tri-O-methylcellulose. The influence of the DP of diblock MC with a DS of around 2.7 on the gelation behavior will be discussed.
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Affiliation(s)
- Atsushi Nakagawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Japan
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Nakagawa A, Ishizu C, Sarbova V, Koschella A, Takano T, Heinze T, Kamitakahara H. 2-O-Methyl- and 3,6-Di-O-methyl-cellulose from Natural Cellulose: Synthesis and Structure Characterization. Biomacromolecules 2012; 13:2760-8. [DOI: 10.1021/bm300754u] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Atsushi Nakagawa
- Graduate School
of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Chiyo Ishizu
- Graduate School
of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Velina Sarbova
- Institute for Organic
Chemistry and Macromolecular Chemistry, Centre of Excellence
for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany
| | - Andreas Koschella
- Institute for Organic
Chemistry and Macromolecular Chemistry, Centre of Excellence
for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany
| | - Toshiyuki Takano
- Graduate School
of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Thomas Heinze
- Institute for Organic
Chemistry and Macromolecular Chemistry, Centre of Excellence
for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany
| | - Hiroshi Kamitakahara
- Graduate School
of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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Enomoto-Rogers Y, Kamitakahara H, Yoshinaga A, Takano T. Comb-shaped graft copolymers with cellulose side-chains prepared via click chemistry. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.10.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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22
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Ichihara N, Takano T, Sakakibara K, Kamitakahara H, Nakatsubo F. Preparation of 6-azafulleroid-6-deoxy-2,3-di-O-myristoylcellulose. Carbohydr Res 2011; 346:2515-8. [DOI: 10.1016/j.carres.2011.08.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 07/27/2011] [Accepted: 08/12/2011] [Indexed: 10/17/2022]
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Nakagawa A, Fenn D, Koschella A, Heinze T, Kamitakahara H. Synthesis of diblock methylcellulose derivatives with regioselective functionalization patterns. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24952] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Nakagawa A, Kamitakahara H, Takano T. Synthesis of blockwise alkylated (1→4) linked trisaccharides as surfactants: influence of configuration of anomeric position on their surface activities. Carbohydr Res 2011; 346:1671-83. [DOI: 10.1016/j.carres.2011.04.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 04/18/2011] [Accepted: 04/26/2011] [Indexed: 10/18/2022]
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25
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Nakagawa A, Fenn D, Koschella A, Heinze T, Kamitakahara H. Physical properties of diblock methylcellulose derivatives with regioselective functionalization patterns: First direct evidence that a sequence of 2,3,6-tri-O-methyl-glucopyranosyl units causes thermoreversible gelation of methylcellulose. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/polb.22343] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Kamitakahara H, Funakoshi T, Nakai S, Takano T, Nakatsubo F. Synthesis and Structure/Property Relationships of Regioselective 2-O
-, 3-O
- and 6-O
-Ethyl Celluloses. Macromol Biosci 2010; 10:638-47. [DOI: 10.1002/mabi.200900392] [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: 11/07/2022]
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27
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Akagi T, Suzuki Y, Ikegami A, Kamitakahara H, Takano T, Nakatsubo F, Yonemori K. Condensed Tannin Composition Analysis in Persimmon (Diospyros kaki Thunb.) Fruit by Acid Catalysis in the Presence of Excess Phloroglucinol. ACTA ACUST UNITED AC 2010. [DOI: 10.2503/jjshs1.79.275] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Enomoto-Rogers Y, Kamitakahara H, Takano T, Nakatsubo F. Cellulosic Graft Copolymer: Poly(methyl methacrylate) with Cellulose Side Chains. Biomacromolecules 2009; 10:2110-7. [DOI: 10.1021/bm900229g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yukiko Enomoto-Rogers
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Kamitakahara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Toshiyuki Takano
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Fumiaki Nakatsubo
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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Kamitakahara H, Koschella A, Mikawa Y, Nakatsubo F, Heinze T, Klemm D. Syntheses and Comparison of 2,6-Di-O-methyl Celluloses from Natural and Synthetic Celluloses. Macromol Biosci 2008; 8:690-700. [DOI: 10.1002/mabi.200700291] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Takano T, Ishikawa J, Kamitakahara H, Nakatsubo F. The application of microwave heating to the synthesis of 6-amino-6-deoxycellulose. Carbohydr Res 2007; 342:2456-60. [PMID: 17669382 DOI: 10.1016/j.carres.2007.07.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 07/11/2007] [Accepted: 07/12/2007] [Indexed: 10/23/2022]
Abstract
Microwave heating was applied to the reactions involved in the synthesis of 6-amino-6-deoxycellulose, 4. These included, cellulose solubilization, bromination at C-6, displacement of bromine with azide ion, and reduction of the azido group to an amino group. Compared to conventional heating, this approach had the advantages of shortening reaction times and retaining the degree of polymerization of 4.
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Affiliation(s)
- Toshiyuki Takano
- Division of Forest and Biomaterials Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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Sakakibara K, Kamitakahara H, Takano T, Nakatsubo F. Redox-active cellulose Langmuir-Blodgett films containing beta-carotene as a molecular wire. Biomacromolecules 2007; 8:1657-64. [PMID: 17458933 DOI: 10.1021/bm061231m] [Citation(s) in RCA: 8] [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: 11/29/2022]
Abstract
Redox-active Langmuir-Blodgett (LB) films containing dihydrophytyl ferrocenoate (DFc) and beta-carotene (betaC) were fabricated by use of 6-O-dihydrophytylcellulose (DHPC) as a matrix. A mixture of DFc-DHPC formed a stable monolayer. Atomic force microscopy images revealed that the DFc molecules were dispersed uniformly throughout the surface in the ratio DFc:DHPC = 2:8 at 30 mN m-1. The DFc-DHPC monolayer was transferred successfully onto a substrate, yielding Y-type LB films. Cyclic voltammograms for the DFc-DHPC LB films on an indium tin oxide (ITO) electrode exhibited a well-defined surface wave. The voltammograms of the DFc-DHPC LB films exhibited 60-40% redox-active ferrocene moieties, whereas those of the DFc-DHPC-betaC LB films exhibited 90-70%. X-ray diffraction patterns indicated that the distance between layers was independent of betaC molecules incorporated into the LB films. Consequently, these results suggested that betaC can function as a molecular wire.
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Affiliation(s)
- Keita Sakakibara
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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Sakakibara K, Ifuku S, Tsujii Y, Kamitakahara H, Takano T, Nakatsubo F. Langmuir−Blodgett Films of a Novel Cellulose Derivative with Dihydrophytyl Group: The Ability to Anchor β-Carotene Molecules. Biomacromolecules 2006; 7:1960-7. [PMID: 16768420 DOI: 10.1021/bm060083x] [Citation(s) in RCA: 10] [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: 11/29/2022]
Abstract
A novel cellulose derivative, 6-O-dihydrophytylcellulose (DHPC), was first synthesized via a ring-opening polymerization and allowed to self-assemble onto an air-water interface. Langmuir-Blodgett (LB) films were characterized with atomic force microscope (AFM), UV-vis spectroscopy, and Fourier transform infrared spectroscopy. The surface pressure-area (pi-A) isotherms for DHPC and beta-carotene (betaC) mixture indicated strong interaction between these compounds to pack well. Thus, DHPC has the ability to anchor betaC in the monolayer. It was proved that a betaC-DHPC monolayer was transferred successfully onto a substrate, yielding Y-type LB films by UV spectroscopic analysis. The transmission and reflection-absorption IR spectra (RAS) indicated that the dihydrophytyl chains had almost trans-zigzag conformation and were oriented nearly perpendicular to the substrate. AFM section analysis revealed the thickness per layer to be 2.32 nm. Consequently, DHPC was found to be an appropriate matrix to fabricate the mixed LB films containing betaC.
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Affiliation(s)
- Keita Sakakibara
- Division of Forest and Biomaterials Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
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Ifuku S, Nakai S, Kamitakahara H, Takano T, Tsujii Y, Nakatsubo F. Preparation and Characterization of Monolayer and Multilayer Langmuir−Blodgett Films of a Series of 6-O-Alkylcelluloses. Biomacromolecules 2005; 6:2067-73. [PMID: 16004446 DOI: 10.1021/bm0500603] [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: 11/29/2022]
Abstract
Monolayer and multilayer Langmuir-Blodgett (LB) films of 6-O-alkylcelluloses with various chain lengths were prepared and studied. The surface pressure (pi)-area (A) isotherms of 6-O-alkylcelluloses exhibited characteristic behaviors depending on the length of the alkyl chain and temperature. 6-O-Stearylcellulose on the subphase formed a homogeneous monolayer at 10 mN m(-1). By transfer ratio, FT-IR, and contact angle measurements, it was proved that the monolayer of 6-O-stearylcellulose on the water surface was transferred successfully onto a substrate by a vertical dipping method to form a Z-type LB film. The transmission and reflection absorption IR spectrum indicated that the hydrocarbon chains had all-trans rotamers and were oriented nearly perpendicular to the surface in the film. AFM section analysis revealed that the thickness per layer was calculated to be 2.35 nm. These results suggested that the hydrocarbon chains were inclined at an angle of about 25.3 degrees to have high packing density in the alkyl region.
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Affiliation(s)
- Shinsuke Ifuku
- Division of Forest and Biomaterials Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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Matsui Y, Ishikawa J, Kamitakahara H, Takano T, Nakatsubo F. Facile synthesis of 6-amino-6-deoxycellulose. Carbohydr Res 2005; 340:1403-6. [PMID: 15854613 DOI: 10.1016/j.carres.2005.02.030] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Accepted: 02/04/2005] [Indexed: 11/30/2022]
Abstract
6-Amino-6-deoxycellulose (4) was synthesized from cellulose by three reaction steps, namely bromination at C-6, displacement of bromine by azide ion, and reduction of the azide group to amino group, in 67% overall yield. The 13C NMR spectrum of compound 4 supports the expected structure for 6-amino-6-deoxycellulose. The degree of substitution of compound 4 was 0.96.
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Affiliation(s)
- Yoshiaki Matsui
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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Ifuku S, Tsujii Y, Kamitakahara H, Takano T, Nakatsubo F. Preparation and characterization of redox cellulose Langmuir-Blodgett films containing a ferrocene derivative. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.20980] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Cellulose was reacted with a series of 4-alkoxytrityl chlorides (C(n)TCl, n: number of carbon atoms in a saturated alkyl chain) under homogeneous reaction conditions in LiCl-N,N-dimethyl acetoamide to give a series of 6-O-(4-alkoxytrityl)celluloses (C(n)TC) with a high degree of substitution (DS), from 0.94 to 0.99, and with high regioselectivity at the 6-O position. Solubility of the C(n)TC in nonpolar solvents depended on the alkyl chain length: as the alkyl chain lengthens, cellulose derivatives become more hydrophobic and are readily soluble in nonpolar solvents, but not in polar solvents. Acetates of the C(4)-C(18)TC (C(4)-C(18)TCAc) showed anisotropic structures over melting temperatures (T(m)) examined under a polarized optical microscope (POM). Over isotropization temperatures (T(i)), flow birefringence were detected for C(12)-C(18)TCAc. The T(m) and T(i) decreased linearly with an increasing number of carbon atoms in the alkyl substituent. Wide-angle X-ray scattering (WAXS) studies of C(n)TC indicated that the fully extended side chains were perpendicular to the polymer backbone and interdigitated. These C(n)TC with the improved solubility may be used as starting materials for further derivatization focused on the secondary hydroxyl groups at the C-2 and C-3 positions.
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Affiliation(s)
- Shinsuke Ifuku
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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Karakawa M, Mikawa Y, Kamitakahara H, Nakatsubo F. Preparations of regioselectively methylated cellulose acetates and their1H and13C NMR spectroscopic analyses. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/pola.10498] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [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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Kamitakahara H, Nakatsubo F, Murakami K. Ring-Opening Polymerization of 1,4-Anhydro-.alpha.-D-glucopyranose Derivatives Having Acyl Groups and Synthesis of (1.fwdarw.5)-.beta.-D-Glucofuranan. Macromolecules 2002. [DOI: 10.1021/ma00099a001] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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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Karakawa M, Kamitakahara H, Takano T, Nakatsubo F. The utility of a 3-O-allyl group as a protective group for ring-opening polymerization of alpha-D-glucopyranose 1,2,4-orthopivalate derivatives. Biomacromolecules 2002; 3:538-46. [PMID: 12005526 DOI: 10.1021/bm015656e] [Citation(s) in RCA: 20] [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: 11/29/2022]
Abstract
To clarify the utility as a protective group of 3-O-allyl group on ring-opening polymerization of alpha-D-glucopyranose 1,2,4-orthopivalate derivatives, four orthopivalate derivatives, 3-O-allyl-6-O-pivaloyl- (1), 3-O-allyl-6-O-benzyl- (2), 3,6-di-O-allyl- (3), and 3-O-allyl-6-O-methyl-alpha-D-glucopyranose 1,2,4-orthopivalates (4), were selected as starting monomers and were polymerized under -30 degrees C in CH2Cl2 using BF3.Et2O as a catalyst. All the orthopivalate derivatives 1-4 were found to give stereoregular polysaccharides, (1-->4)-beta-D-glucopyranans. Thus, it was concluded that the allyl group as a protective group at 3-O position of glucose othropivalate is acceptable to yield stereoregular (1-->4)-beta-D-glucopyranans, cellulose derivatives.
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Affiliation(s)
- Makoto Karakawa
- Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-Ku, Kyoto 606-8502, Japan.
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Kamitakahara H, Suzuki T, Nishigori N, Suzuki Y, Kanie O, Wong CH. A Lysoganglioside/Poly-L-glutamic Acid Conjugate as a Picomolar Inhibitor of Influenza Hemagglutinin. Angew Chem Int Ed Engl 1998; 37:1524-1528. [PMID: 29710929 DOI: 10.1002/(sici)1521-3773(19980619)37:11<1524::aid-anie1524>3.0.co;2-d] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/1997] [Indexed: 11/09/2022]
Abstract
Based on the principle of a multivalent interaction, the amphiphilic polymer 1, present in solution as an aggregate (see below right), is able to inhibit infection with the influenza virus. After recognition of a specific sialyllactose epitope through hemaglutinin (HA) on the virus surface, the sphingosine residues and the fluorescent tag form a stable complex with HA through hydrophobic interactions. Polymer 1 shows in vitro inhibitory activity 106 -fold greater than that of sialyllactose. PGA=polyglutamic acid.
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Affiliation(s)
- Hiroshi Kamitakahara
- Frontier Research Program, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-01 (Japan), Fax: (+81) 48-467-3620
| | - Takashi Suzuki
- Department of Biochemistry, School of Pharmaceutical Science, University of Shizuoka (Japan)
| | - Noriko Nishigori
- Department of Biochemistry, School of Pharmaceutical Science, University of Shizuoka (Japan)
| | - Yasuo Suzuki
- Department of Biochemistry, School of Pharmaceutical Science, University of Shizuoka (Japan)
| | - Osamu Kanie
- Frontier Research Program, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-01 (Japan), Fax: (+81) 48-467-3620
| | - Chi-Huey Wong
- Frontier Research Program, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-01 (Japan), Fax: (+81) 48-467-3620
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Kamitakahara H, Suzuki T, Nishigori N, Suzuki Y, Kanie O, Wong CH. Ein Lysogangliosid/Poly-L-glutaminsäure- Konjugat als picomolarer Inhibitor von Influenza-Hämagglutinin. Angew Chem Int Ed Engl 1998. [DOI: 10.1002/(sici)1521-3757(19980605)110:11<1607::aid-ange1607>3.0.co;2-h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hori M, Kamitakahara H, Nakatsubo F. Substituent Effects of the Orthoester Group on Ring-Opening Polymerization of α-d-Glucopyranose 1,2,4-Orthoester Derivatives. Macromolecules 1997. [DOI: 10.1021/ma961883a] [Citation(s) in RCA: 14] [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: 11/28/2022]
Affiliation(s)
- Michiko Hori
- Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
| | - Hiroshi Kamitakahara
- Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
| | - Fumiaki Nakatsubo
- Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
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Kamitakahara H, Hori M, Nakatsubo F. Substituent Effect on Ring-Opening Polymerization of Regioselectively Acylated α-d-Glucopyranose 1,2,4-Orthopivalate Derivatives. Macromolecules 1996. [DOI: 10.1021/ma960488h] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Michiko Hori
- Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
| | - Fumiaki Nakatsubo
- Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
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Nakatsubo F, Kamitakahara H, Hori M. Cationic Ring-Opening Polymerization of 3,6-Di-O-benzyl-α-d-glucose 1,2,4-Orthopivalate and the First Chemical Synthesis of Cellulose. J Am Chem Soc 1996. [DOI: 10.1021/ja953286u] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fumiaki Nakatsubo
- Contribution from the Department of Wood Science & Technology, Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
| | - Hiroshi Kamitakahara
- Contribution from the Department of Wood Science & Technology, Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
| | - Michiko Hori
- Contribution from the Department of Wood Science & Technology, Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
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Kamitakahara H, Nakatsubo F. Substituent Effect on Ring-Opening Polymerization of Regioselectively Acylated 1,4-Anhydro-α-d-glucopyranose Derivatives. Macromolecules 1996. [DOI: 10.1021/ma951454x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Fumiaki Nakatsubo
- Faculty of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
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