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Ajito K. Remembering Dr. Shinichi Kondo (15 June 1928-8 October 2022). J Antibiot (Tokyo) 2024; 77:126-127. [PMID: 38036667 DOI: 10.1038/s41429-023-00685-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 10/19/2023] [Indexed: 12/02/2023]
Affiliation(s)
- Keiichi Ajito
- Section Editor, Structure Determination/Synthetic Chemistry, the Journal of Antibiotics, Tokyo, Japan.
- Chief Director, Kitasato Research Center for Environmental Science, Sagamihara, Japan.
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2
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Kumura K, Umemura E, Hirai Y, Ajito K. Discovery of Novel Lincomycin Derivatives Effective against Resistant Streptococcus pneumoniae and Streptococcus pyogenes Possessing ErmB Gene. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ko Kumura
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd
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3
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Hirai Y, Maebashi K, Yamada K, Wakiyama Y, Kumura K, Umemura E, Ajito K. Characterization of compound A, a novel lincomycin derivative active against methicillin-resistant Staphylococcus aureus. J Antibiot (Tokyo) 2020; 74:124-132. [PMID: 33060814 DOI: 10.1038/s41429-020-00375-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/11/2020] [Accepted: 09/13/2020] [Indexed: 11/09/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is one of causative bacteria for hospital- and community-acquired infections. In order to overcome MRSA infection, we synthesized compound A, a lincomycin derivative, and evaluated the biological properties. The MIC50 and MIC90 values of compound A against MRSA clinical isolates, which were susceptible to clindamycin, from infected skin in Japan were 0.12 and 0.25 μg ml-1, respectively, and those against hospital-acquired MRSA with clindamycin resistance were 1.0 and 2.0 μg ml-1, respectively. Linezolid non-susceptible MRSA selected in the laboratory had mutations in the 23S rRNA gene and exhibited cross-resistance to compound A. MRSA non-susceptible to compound A selected in laboratory was not cross-resistant to linezolid, implying that the binding site to 23S rRNA partly overlaps with clindamycin and linezolid. The in vivo efficacies of compound A against mouse skin abscess model infected with clindamycin-susceptible and -resistant MRSA were superior to those of clindamycin and linezolid, respectively. The well-known linezolid-induced myelosuppression is caused by its inhibitory effect on mitochondrial function, but inhibition was weaker for compound A than that of linezolid. In short, compound A has broader anti-MRSA activities than clindamycin and linezolid due to additional binding site, and demonstrated preferable safety profile as a potential anti-MRSA drug.
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Affiliation(s)
- Yoko Hirai
- Pharmacology Research Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan. .,Licensing and Product Acquisition, Partnering Strategy and Business Development Department, Meiji Seika Pharma Co., Ltd., Tokyo, Japan.
| | - Kazunori Maebashi
- Pharmacology Research Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan.,Drug Development Planning and Management Group, R&D Planning and Management, Meiji Seika Pharma Co., Ltd., Tokyo, Japan
| | - Keiko Yamada
- Pharmacology Research Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Yoshinari Wakiyama
- Medical Chemistry Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Ko Kumura
- Medical Chemistry Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Eijiro Umemura
- Medical Chemistry Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan.,Laboratory of Medicinal Chemistry, Institute of Microbial Chemistry, Tokyo, Japan
| | - Keiichi Ajito
- Medical Chemistry Laboratory, Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan.,Kitasato Research Center for Environmental Science, Sagamihara, Japan
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Nanri Y, Nunomura S, Terasaki Y, Yoshihara T, Hirano Y, Yokosaki Y, Yamaguchi Y, Feghali-Bostwick C, Ajito K, Murakami S, Conway SJ, Izuhara K. Cross-Talk between Transforming Growth Factor-β and Periostin Can Be Targeted for Pulmonary Fibrosis. Am J Respir Cell Mol Biol 2020; 62:204-216. [PMID: 31505128 PMCID: PMC6993541 DOI: 10.1165/rcmb.2019-0245oc] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 09/06/2019] [Indexed: 12/21/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized as progressive and irreversible fibrosis in the interstitium of lung tissues. There is still an unmet need to develop a novel therapeutic drug for IPF. We have previously demonstrated that periostin, a matricellular protein, plays an important role in the pathogenesis of pulmonary fibrosis. However, the underlying mechanism of how periostin causes pulmonary fibrosis remains unclear. In this study, we sought to learn whether the cross-talk between TGF-β (transforming growth factor-β), a central mediator in pulmonary fibrosis, and periostin in lung fibroblasts leads to generation of pulmonary fibrosis and whether inhibitors for integrin αVβ3, a periostin receptor, can block pulmonary fibrosis in model mice and the TGF-β signals in fibroblasts from patients with IPF. We found that cross-talk exists between TGF-β and periostin signals via αVβ3/β5 converging into Smad3. This cross-talk is necessary for the expression of TGF-β downstream effector molecules important for pulmonary fibrosis. Moreover, we identified several potent integrin low-molecular-weight inhibitors capable of blocking cross-talk with TGF-β signaling. One of the compounds, CP4715, attenuated bleomycin-induced pulmonary fibrosis in vivo in mice and the TGF-β signals in vitro in fibroblasts from patients with IPF. These results suggest that the cross-talk between TGF-β and periostin can be targeted for pulmonary fibrosis and that CP4715 can be a potential therapeutic agent to block this cross-talk.
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Affiliation(s)
- Yasuhiro Nanri
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - Satoshi Nunomura
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - Yasuhiro Terasaki
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo, Japan
| | - Tomohito Yoshihara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - Yusuke Hirano
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - Yasuyuki Yokosaki
- Cell-Matrix Frontier Lab, Health Administration Office, Hiroshima University, Hiroshima, Japan
| | - Yukie Yamaguchi
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Carol Feghali-Bostwick
- Division of Rheumatology and Immunology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Keiichi Ajito
- Pharmaceutical Research Center, Meiji Seika Pharma Co. Ltd., Tokyo, Japan; and
| | - Shoichi Murakami
- Pharmaceutical Research Center, Meiji Seika Pharma Co. Ltd., Tokyo, Japan; and
| | - Simon J. Conway
- Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana
| | - Kenji Izuhara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
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Yoshihara T, Nanri Y, Nunomura S, Yamaguchi Y, Feghali-Bostwick C, Ajito K, Murakami S, Mawatari M, Izuhara K. Periostin plays a critical role in the cell cycle in lung fibroblasts. Respir Res 2020; 21:38. [PMID: 32000779 PMCID: PMC6993476 DOI: 10.1186/s12931-020-1299-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 07/29/2019] [Accepted: 01/19/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Idiopathic pulmonary fibrosis (IPF) is a devastating disease with a median survival of only three to 5 years. Fibroblast proliferation is a hallmark of IPF as is secretion of extracellular matrix proteins from fibroblasts. However, it is still uncertain how IPF fibroblasts acquire the ability to progressively proliferate. Periostin is a matricellular protein highly expressed in the lung tissues of IPF patients, playing a critical role in the pathogenesis of pulmonary fibrosis. However, it remains undetermined whether periostin affects lung fibroblast proliferation. METHODS In this study, we first aimed at identifying periostin-dependently expressed genes in lung fibroblasts using DNA microarrays. We then examined whether expression of cyclins and CDKs controlling cell cycle progression occur in a periostin-dependent manner. We next examined whether downregulation of cell proliferation-promoting genes by knockdown of periostin or integrin, a periostin receptor, using siRNA, is reflected in the cell proliferation of lung fibroblasts. We then looked at whether lung fibroblasts derived from IPF patients also require periostin for maximum proliferation. We finally investigated whether CP4715, a potent inhibitor against integrin αVβ3 (a periostin receptor), which we have recently found blocks TGF-β signaling, followed by reduced BLM-induced pulmonary fibrosis in mice, can block proliferation of lung fibroblasts derived from IPF patients. RESULTS Many cell-cycle-related genes are involved in the upregulated or downregulated genes by periostin knockdown. We confirmed that in lung fibroblasts, periostin silencing downregulates expression of several cell-cycle-related molecules, including the cyclin, CDK, and, E2F families, as well as transcription factors such as B-MYB and FOXM1. Periostin or integrin silencing slowed proliferation of lung fibroblasts and periostin silencing increased the distribution of the G0/G1 phase, whereas the distribution of the G2/M phase was decreased. Lung fibroblasts derived from IPF patients also required periostin for maximum proliferation. Moreover, CP4715 downregulated proliferation along with expression of cell-cycle-related genes in IPF lung fibroblasts as well as in normal lung fibroblasts. CONCLUSIONS Periostin plays a critical role in the proliferation of lung fibroblasts and the present results provide us a solid basis for considering inhibitors of the periostin/integrin αVβ3 interaction for the treatment of IPF patients.
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Affiliation(s)
- Tomohito Yoshihara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Yasuhiro Nanri
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Satoshi Nunomura
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Yukie Yamaguchi
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, 236-0004, Japan
| | - Carol Feghali-Bostwick
- Division of Rheumatology and Immunology, Department of Medicine, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Keiichi Ajito
- Pharmaceutical Research Center, Meiji Seika Pharma Co. Ltd., Yokohama, 222-8567, Japan
| | - Shoichi Murakami
- Pharmaceutical Research Center, Meiji Seika Pharma Co. Ltd., Yokohama, 222-8567, Japan
| | - Masaaki Mawatari
- Department of Orthopaedic Surgery, Saga Medical School, Saga, 849-8501, Japan
| | - Kenji Izuhara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, 5-1-1 Nabeshima, Saga, 849-8501, Japan.
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Gouda H, Nakayama N, Miura T, Kanemoto K, Ajito K. Computational study on formation of 15-membered azalactone by double reductive amination using molecular mechanics and density functional theory calculations. J Antibiot (Tokyo) 2018. [DOI: 10.1038/s41429-018-0030-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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Wakiyama Y, Kumura K, Umemura E, Masaki S, Ueda K, Sato Y, Hirai Y, Hayashi Y, Ajito K. Synthesis and SARs of novel lincomycin derivatives Part 5: optimization of lincomycin analogs exhibiting potent antibacterial activities by chemical modification at the 6- and 7-positions. J Antibiot (Tokyo) 2017; 71:298-317. [DOI: 10.1038/ja.2017.114] [Citation(s) in RCA: 4] [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: 05/20/2017] [Revised: 08/15/2017] [Accepted: 08/24/2017] [Indexed: 11/09/2022]
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Kumura K, Wakiyama Y, Ueda K, Umemura E, Watanabe T, Yamamoto M, Yoshida T, Ajito K. Synthesis and antibacterial activity of novel lincomycin derivatives. III. Optimization of a phenyl thiadiazole moiety. J Antibiot (Tokyo) 2017; 71:ja201759. [PMID: 28676716 DOI: 10.1038/ja.2017.59] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 04/09/2017] [Accepted: 04/21/2017] [Indexed: 11/08/2022]
Abstract
Lincomycin derivatives that have a 5-(2-nitrophenyl)-1,3,4-thiadiazol-2-yl thio moiety at the 7-position were synthesized. 5-Substituted 2-nitrophenyl derivatives showed potent antibacterial activities against Streptococcus pneumoniae and Streptococcus pyogenes with erm gene. Antibacterial activities of the 4,5-di-substituted 2-nitrophenyl derivatives were generally comparable to those of telithromycin (TEL) against S. pneumoniae with erm gene and clearly superior to those of TEL against S. pyogenes with erm gene. Compounds 6 and 10c that have a methoxy group at the 5-position of the benzene ring exhibited activities comparable to TEL against Haemophilus influenzae. These results suggest that lincomycin derivatives modified at the 7-position would be promising compounds as a clinical candidate. We would like to dedicate this article to the special issue for late Professor Dr. Hamao Umezawa in The Journal of Antibiotics.The Journal of Antibiotics advance online publication, 5 July 2017; doi:10.1038/ja.2017.59.
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Affiliation(s)
- Ko Kumura
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Yoshinari Wakiyama
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Kazutaka Ueda
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Eijiro Umemura
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Takashi Watanabe
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Mikio Yamamoto
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Takuji Yoshida
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
| | - Keiichi Ajito
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd, Yokohama, Japan
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Wakiyama Y, Kumura K, Umemura E, Ueda K, Watanabe T, Yamada K, Okutomi T, Ajito K. Synthesis and structure–activity relationships of novel lincomycin derivatives. Part 4: synthesis of novel lincomycin analogs modified at the 6- and 7-positions and their potent antibacterial activities. J Antibiot (Tokyo) 2017; 70:888-906. [DOI: 10.1038/ja.2017.54] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 03/20/2017] [Indexed: 11/09/2022]
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10
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Kumura K, Wakiyama Y, Ueda K, Umemura E, Watanabe T, Shitara E, Fushimi H, Yoshida T, Ajito K. Synthesis and antibacterial activity of novel lincomycin derivatives. I. Enhancement of antibacterial activities by introduction of substituted azetidines. J Antibiot (Tokyo) 2016; 69:440-5. [DOI: 10.1038/ja.2015.134] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 11/07/2015] [Accepted: 11/19/2015] [Indexed: 11/09/2022]
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11
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Wakiyama Y, Kumura K, Umemura E, Masaki S, Ueda K, Watanabe T, Yamamoto M, Hirai Y, Ajito K. Synthesis and structure-activity relationships of novel lincomycin derivatives. Part 2. Synthesis of 7(S)-7-deoxy-7-(4-morpholinocarbonylphenylthio)lincomycin and its 3-dimensional analysis with rRNA. J Antibiot (Tokyo) 2015; 69:428-39. [PMID: 26669751 DOI: 10.1038/ja.2015.125] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 11/02/2015] [Accepted: 11/12/2015] [Indexed: 11/09/2022]
Abstract
Lincomycin derivatives, which possess a hetero ring at the C-7 position via sulfur atom, were synthesized by three types of reactions: (1) Mitsunobu reaction of 2,3,4-tris-O-(trimethylsiliyl)lincomycin (1) with the corresponding thiol, (2) SN2 reaction of 7-O-methanesulfonyl-2,3,4-tris-O-(trimethylsiliyl)lincomycin (2) with the corresponding thiol and (3) Pd-catalyzed cross-coupling reaction of 7-deoxy-7-epi-7-mercaptolincomycin (35) with the corresponding aryl halides. As a result, compound 28 had potent antibacterial activities against major pathogens, which caused respiratory infections, even compared with clindamycin. On the other hand, compound 38 showed most potent activities against a variety of Streptococcus pneumoniae with erm gene.
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Affiliation(s)
- Yoshinari Wakiyama
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Ko Kumura
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Eijiro Umemura
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Satomi Masaki
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Kazutaka Ueda
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Takashi Watanabe
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Mikio Yamamoto
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Yoko Hirai
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
| | - Keiichi Ajito
- Pharmaceutical Research Center, Meiji Seika Pharma Co., Ltd., Yokohama, Japan
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Wakiyama Y, Kumura K, Umemura E, Ueda K, Masaki S, Kumura M, Fushimi H, Ajito K. Synthesis and structure–activity relationships of novel lincomycin derivatives. Part 1. Newly generated antibacterial activities against Gram-positive bacteria with erm gene by C-7 modification. J Antibiot (Tokyo) 2015; 69:368-80. [DOI: 10.1038/ja.2015.119] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 09/15/2015] [Accepted: 10/29/2015] [Indexed: 11/09/2022]
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15
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Miura T, Kanemoto K, Ajito K. Chemical Transformation of Lactone Starting from 16-Membered Macrolides, Leucomycins, and Generation of Novel Azalides. J SYN ORG CHEM JPN 2011. [DOI: 10.5059/yukigoseikyokaishi.69.1339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Miura T, Natsume S, Kanemoto K, Shitara E, Fushimi H, Yoshida T, Ajito K. Novel azalides derived from 16-membered macrolides. III. Azalides modified at the C-15 and 4'' positions: Improved antibacterial activities. Bioorg Med Chem 2010; 18:2735-47. [PMID: 20236827 DOI: 10.1016/j.bmc.2010.02.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Revised: 02/08/2010] [Accepted: 02/09/2010] [Indexed: 11/17/2022]
Abstract
The design and synthesis of 16-membered azalides modified at the C-15 and 4'' positions are described. The compounds we report here are characterized by an arylpropenyl group attached to the C-15 position of macrolactone and a carbamoyl group at the C-4'' position in a neutral sugar. Introduction of alkylcarbamoyl groups to the C-4'' position was regioselectively achieved by unique and convenient methods via acyl migration. As a result of optimization at the C-3 and 15 positions, several compounds were found to have potent activity against mef- and erm-resistant bacterial strains. These results suggest that 16-membered azalides could be promising compounds as clinical candidates.
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Affiliation(s)
- Tomoaki Miura
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd, 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan.
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Miura T, Kanemoto K, Natsume S, Atsumi K, Fushimi H, Yoshida T, Ajito K. Novel azalides derived from 16-membered macrolides. Part II: Isolation of the linear 9-formylcarboxylic acid and its sequential macrocyclization with an amino alcohol or an azidoamine. Bioorg Med Chem 2008; 16:10129-56. [DOI: 10.1016/j.bmc.2008.09.054] [Citation(s) in RCA: 17] [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] [Received: 08/13/2008] [Revised: 09/19/2008] [Accepted: 09/20/2008] [Indexed: 10/21/2022]
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Ishikawa M, Tsushima M, Kubota D, Yanagisawa Y, Hiraiwa Y, Kojima Y, Ajito K, Anzai N. A Scalable Synthesis of MN-447, an Antagonist for Integrins αvβ3 and αIIbβ3. Org Process Res Dev 2008. [DOI: 10.1021/op800073z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [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)
- Minoru Ishikawa
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Masaki Tsushima
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Dai Kubota
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Yumiko Yanagisawa
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Yukiko Hiraiwa
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Yasuo Kojima
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Keiichi Ajito
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
| | - Naomichi Anzai
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
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Miura T, Kurihara KI, Furuuchi T, Yoshida T, Ajito K. Novel 16-membered macrolides modified at C-12 and C-13 positions of midecamycin A1 and miokamycin. Part 1: Synthesis and evaluation of 12,13-carbamate and 12-arylalkylamino-13-hydroxy analogues. Bioorg Med Chem 2008; 16:3985-4002. [PMID: 18258437 DOI: 10.1016/j.bmc.2008.01.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 01/15/2008] [Accepted: 01/16/2008] [Indexed: 11/28/2022]
Abstract
Design and synthesis of 16-membered macrolides modified at the C-12 and 13 positions are described. The compounds we report here have an arylalkylamino group attached to the C-12 position of the macrolactone. Both types of derivatives, 12,13-cyclic carbamates and non-carbamate analogues, were synthesized via 12-amino-13-hydroxy intermediates derived from 12,13-epoxide that was prepared by selective epoxidation at the C-12 and C-13 positions. 4'-Hydroxyl analogues were also prepared by acidic hydrolysis of a neutral sugar. These compounds were evaluated for in vitro antibacterial activity against respiratory tract pathogens. Some of these analogues exhibited an improved activity compared with the corresponding parent compound.
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Affiliation(s)
- Tomoaki Miura
- Pharmaceutical Research Center, Meiji Seika Kaisha Ltd, 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan.
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20
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Ishikawa M, Kubota D, Ajito K. Synthesis of Potent .ALPHA.v.BETA.3/.ALPHA.IIb.BETA.3 Dual Antagonists Tricyclic Pharmacophore-based Molecules and Their Selectivity Control. J SYN ORG CHEM JPN 2008. [DOI: 10.5059/yukigoseikyokaishi.66.1093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Miura T, Natsume S, Kanemoto K, Atsumi K, Fushimi H, Sasai H, Arai T, Yoshida T, Ajito K. Novel azalides derived from sixteen-membered macrolides. J Antibiot (Tokyo) 2007; 60:407-35. [PMID: 17721001 DOI: 10.1038/ja.2007.55] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The design and synthesis of novel 15-membered 11-azalides and 16-membered 11,12-diazalide starting from 16-membered macrolides are reported. A mobile linear dialdehyde was isolated via a cyclic tetraol which was prepared by osmium oxidation of a conjugated diene. One-pot macrocyclization of this dialdehyde with an amine or a diamine afforded corresponding 15-membered azalides or 11,12-diazalide. Fundamental SAR studies of 15-membered 11-azalides disclosed their potentiality as a lead molecule for further chemical modifications. For environmental preservation, sustainable chemistry for synthesis of these azalides is also discussed.
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Affiliation(s)
- Tomoaki Miura
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama, Japan
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22
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Tadano KI, Sasaki D, Sawamoto D, Takao KI, Okue M, Ajito K. Stereoselective Mannich-Like Reactions of Ester Enolates Generated on Sugar Templates: A Novel Access to a Key Intermediate for 1β-Methylcarbapenem Synthesis. HETEROCYCLES 2007. [DOI: 10.3987/com-06-s(k)9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Kubota D, Ishikawa M, Yamamoto M, Murakami S, Hachisu M, Katano K, Ajito K. Tricyclic pharmacophore-based molecules as novel integrin αvβ3 antagonists. Part 1: Design and synthesis of a lead compound exhibiting αvβ3/αIIbβ3 dual antagonistic activity. Bioorg Med Chem 2006; 14:2089-108. [PMID: 16309911 DOI: 10.1016/j.bmc.2005.10.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2005] [Revised: 10/31/2005] [Accepted: 10/31/2005] [Indexed: 10/25/2022]
Abstract
In order to generate novel compounds with integrin alpha(v)beta3-antagonistic activity together with antiplatelet activity, tricyclic pharmacophore-based molecules were designed and synthesized. Although piperazine-containing compounds initially prepared were selective alpha(IIb)beta3 antagonists, replacement of piperazine with piperidine furnished a potent alpha(v)beta3/alpha(IIb)beta3 dual antagonist. Structure-activity relationship (SAR) studies provided clues for further development of tricyclic pharmacophore-based integrin antagonists.
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Affiliation(s)
- Dai Kubota
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
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24
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Kubota D, Ishikawa M, Ishikawa M, Yahata N, Murakami S, Fujishima K, Kitakaze M, Ajito K. Tricyclic pharmacophore-based molecules as novel integrin alphavbeta3 antagonists. Part IV: preliminary control of alphavbeta3 selectivity by meta-oriented substitution. Bioorg Med Chem 2006; 14:4158-81. [PMID: 16504518 DOI: 10.1016/j.bmc.2006.01.062] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Revised: 01/26/2006] [Accepted: 01/27/2006] [Indexed: 11/21/2022]
Abstract
To establish the in vivo efficacy of alphavbeta3/alphaIIbbeta3 dual antagonists possessing a tricyclic pharmacophore, a corresponding alphavbeta3-selective antagonist was required as a control. We initially took two synthetic approaches to obtain alphavbeta3-selective antagonists based on the RGD recognition pattern or on modification of the dihedral angle between the central benzene ring and the adjacent heterocycle, but both proved unsuccessful. However, synthesis of novel antagonists with meta-substitution of the central benzene ring generated weak selectivity for alphavbeta3 over alphaIIbbeta3 for the first time in the family of compounds with the tricyclic pharmacophore. Optimization of meta-oriented antagonists furnished an alphavbeta3-selective antagonist exhibiting inhibitory activity not only in a receptor-binding assay, but also in a cell adhesion assay.
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Affiliation(s)
- Dai Kubota
- Pharmaceutical Research Department, Meiji Seika Kaisha, Ltd, Yokohama 222-8567, Japan
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25
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Oishi S, Miyamoto K, Niida A, Yamamoto M, Ajito K, Tamamura H, Otaka A, Kuroda Y, Asai A, Fujii N. Application of tri- and tetrasubstituted alkene dipeptide mimetics to conformational studies of cyclic RGD peptides. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.11.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Ishikawa M, Kubota D, Yamamoto M, Kuroda C, Iguchi M, Koyanagi A, Murakami S, Ajito K. Tricyclic pharmacophore-based molecules as novel integrin alpha(v)beta3 antagonists. Part 2: synthesis of potent alpha(v)beta3/alpha(IIb)beta3 dual antagonists. Bioorg Med Chem 2005; 14:2109-30. [PMID: 16309912 DOI: 10.1016/j.bmc.2005.10.061] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2005] [Revised: 10/31/2005] [Accepted: 10/31/2005] [Indexed: 10/25/2022]
Abstract
We synthesized 4-aminopiperidine derivatives of our prototype integrin alpha(v)beta3 antagonist 1 in an attempt to increase the activity and water solubility. Introduction of one or two hydrophilic moieties into the central aromatic ring and/or the benzene ring at the C-terminus of 1 increased water solubility and enhanced inhibition of cell adhesion. The results of a structure-activity relationships (SAR) study indicated that the torsion angle between the central aromatic ring and the piperidine ring, and the acidity at the sulfonamide moiety, might be important for alpha(v)beta3 receptor binding activity. Some of these compounds are novel and potent alpha(v)beta3/alpha(IIb)beta3 dual antagonists with acceptable water solubility and a satisfactory early absorption, distribution, metabolism, excretion, and toxicity (ADMET) profile.
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Affiliation(s)
- Minoru Ishikawa
- Pharmaceutical Research Department, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
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27
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Ishikawa M, Hiraiwa Y, Kubota D, Tsushima M, Watanabe T, Murakami S, Ouchi S, Ajito K. Tricyclic pharmacophore-based molecules as novel integrin alpha(v)beta3 antagonists. Part III: synthesis of potent antagonists with alpha(v)beta3/alpha(IIb)beta3 dual activity and improved water solubility. Bioorg Med Chem 2005; 14:2131-50. [PMID: 16307881 DOI: 10.1016/j.bmc.2005.10.055] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [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: 08/06/2005] [Revised: 10/31/2005] [Accepted: 10/31/2005] [Indexed: 11/27/2022]
Abstract
In order to optimize our novel integrin alpha(v)beta3/alpha(IIb)beta3 dual antagonists, spatial screening at the N-terminus was performed. The alpha(v)beta3 antagonistic activity varied depending on the space that was occupied by the N-terminus, but high potency against alpha(IIb)beta3 was well maintained. The (3S)-aminopiperidine analogue had the strongest activity against alpha(v)beta3, and the S isomer at piperidine was more potent than the R isomer. Compounds selected on the basis of SAR analysis of a novel lead compound showed acceptable early absorption, distribution, metabolism, excretion, and toxicity (ADMET) profiles and sufficient water solubility for use as infusion drugs. Docking studies with the alpha(v)beta3 receptor were performed to confirm the SAR findings.
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Affiliation(s)
- Minoru Ishikawa
- Pharmaceutical Research Department, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan.
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28
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Fontes A, Ajito K, Neves AAR, Moreira WL, de Thomaz AA, Barbosa LC, de Paula AM, Cesar CL. Raman, hyper-Raman, hyper-Rayleigh, two-photon luminescence and morphology-dependent resonance modes in a single optical tweezers system. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 72:012903. [PMID: 16090020 DOI: 10.1103/physreve.72.012903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2004] [Indexed: 05/03/2023]
Abstract
We present a setup of optical tweezers combined with linear and nonlinear microspectroscopies that enhances the capabilities of capture and analysis of both techniques. We can use either a continuous-wave (cw) Ti:sapphire laser for Raman measurements or a pulsed femtosecond Ti:sapphire laser that permitted the observation of nonlinear results such as hyper-Raman, hyper-Rayleigh, and two-photon luminescence. Only the high peak intensity of the femtosecond laser allows the observation of all these nonlinear spectroscopies. The sensitivity of our system also permitted the observation of morphology-dependent resonance (MDR) modes of a single stained trapped microsphere of 6 microm. The possibility of performing spectroscopy in a living microorganism optically trapped in any desired neighborhood would mean that one can dynamically observe the chemical reactions and/or mechanical properties changing in real time.
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Affiliation(s)
- A Fontes
- Instituto de Física Gleb Wataghin UNICAMP, Campinas-SP, Brazil
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29
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Nishimura Y, Adachi H, Kyo M, Murakami S, Hattori S, Ajito K. A proof of the specificity of kanamycin-ribosomal RNA interaction with designed synthetic analogs and the antibacterial activity. Bioorg Med Chem Lett 2005; 15:2159-62. [PMID: 15808488 DOI: 10.1016/j.bmcl.2005.02.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Accepted: 02/04/2005] [Indexed: 10/25/2022]
Abstract
The binding specificity of designed synthetic kanamycins with model RNA sequences (wild-type and point-mutated type) derived from the 16S ribosomal A-site was evaluated using surface plasmon resonance imaging. It was observed that kanamycins have nonspecific and multiple interactions with RNA hairpins and that the binding potency is not always proportional to the antimicrobial activity.
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Affiliation(s)
- Yoshio Nishimura
- Microbial Chemistry Research Center, 3-14-23, Kamiosaki, Shinagawa-ku, Tokyo, Japan.
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30
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Furuuchi T, Kurihara KI, Yoshida T, Ajito K. Synthesis and biological evaluation of novel leucomycin analogues modified at the C-3 position. I. Epimerization and methylation of the 3-hydroxyl group. J Antibiot (Tokyo) 2003; 56:399-414. [PMID: 12817814 DOI: 10.7164/antibiotics.56.399] [Citation(s) in RCA: 16] [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] [Indexed: 11/21/2022]
Abstract
The synthesis and biological evaluation of sixteen-membered macrolides modified at the C-3 position are described. 3-Epi-leucomycin A7 (9), 3-O-acyl-3-epi-leucomycin A7 analogues (11a-11e), 3-O-acylleucomycin A7 analogues (13b-13e) and 3-O-methylleucomycin analogues (16a, 16b and 22) were synthesized via fully protected intermediates (7, 5a, 5b and 20). After appropriate modification, subsequent deprotections were performed to furnish a variety of leucomycin analogues. Methylation of the 3-hydroxyl group was found to improve the pharmacoprofile of leucomycin antibiotics. 3-O-Methylrokitamycin (16b) showed enhanced antibacterial activity in vitro and 3,3''-di-O-methyl-4''-O-(3-methylbutyl)leucomycin V (22) exhibited improved metabolic stability in rat plasma in vitro.
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Affiliation(s)
- Takeshi Furuuchi
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan
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31
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Ogawa M, Hatano K, Oishi S, Kawasumi Y, Fujii N, Kawaguchi M, Doi R, Imamura M, Yamamoto M, Ajito K, Mukai T, Saji H, Ito K. Direct electrophilic radiofluorination of a cyclic RGD peptide for in vivo alpha(v)beta3 integrin related tumor imaging. Nucl Med Biol 2003; 30:1-9. [PMID: 12493537 DOI: 10.1016/s0969-8051(02)00387-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [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: 11/22/2022]
Abstract
The association of the alpha(v)beta(3) integrin with tumor metastasis and tumor related angiogenesis has been suggested. Therefore, by imaging the alpha(v)beta(3) receptor with PET, information concerning the tumor status could be obtained. Cyclic peptides including the RGD sequence, were radiolabeled by direct electrophilic fluorination with [(18)F]AcOF. In tumor-bearing mice, the labeled peptides accumulated at the tumor with a high tumor to blood ratio. These findings suggest that an assessment of tumor characteristics may be obtained by using these (18)F-labeled peptides.
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Affiliation(s)
- Mikako Ogawa
- Department of Biofunctional Research, National Institute for Longevity Sciences, Gengo, Morioka-cho, Obu 474-8522, Japan
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32
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Oishi S, Kamano T, Niida A, Odagaki Y, Hamanaka N, Yamamoto M, Ajito K, Tamamura H, Otaka A, Fujii N. Diastereoselective synthesis of new psi[(E)-CH=CMe]- and psi[(Z)-CH=CMe]-type alkene dipeptide isosteres by organocopper reagents and application to conformationally restricted cyclic RGD peptidomimetics. J Org Chem 2002; 67:6162-73. [PMID: 12182657 DOI: 10.1021/jo025923m] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diastereoselective synthesis of new psi[(E)-CH=CMe]- and psi[(Z)-CH=CMe]-type alkene dipeptide isosteres corresponding to dipeptides having one N-methylamino acid, and application to bioactive peptides, are described. In a key reaction introducing the chiral alpha-alkyl group of the isosteres, organocopper-mediated alkylation of syn-beta-methylated gamma-mesyloxy-alpha,beta-enoate 26a afforded E- and Z-isomers of anti-S(N)2' products in a solvent-dependent manner. The resulting two isosteres, D-Phe-psi[(E)-CH=CMe]-L-Val 27a and D-Phe-psi[(Z)-CH=CMe]-L-Val 28b, which corresponded to trans- and cis-conformers of D-Phe-L-MeVal, respectively, were utilized in a structure-activity relationship study on cyclic RGD peptides 1 and 2, in company with a psi[(E)-CH=CH]-type alkene dipeptide isostere, D-Phe-psi[(E)-CH=CH]-L-Val. The cyclic isostere-containing pseudopeptides 3, 4, and 40 were synthesized and biological activity against integrin alpha(V)beta(3) and alpha(IIb)beta(3) receptors were also evaluated.
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Affiliation(s)
- Shinya Oishi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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33
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Oishi S, Niida A, Kamano T, Miwa Y, Taga T, Odagaki Y, Hamanaka N, Yamamoto M, Ajito K, Tamamura H, Otaka A, Fujii N. Regio- and stereoselective ring-opening of chiral 1,3-oxazolidin-2-one derivatives by organocopper reagents provides novel access to di-, tri- and tetra-substituted alkene dipeptide isosteresElectronic supplementary information (ESI) available: synthetic procedures and characterization for 4a,b, 5a,b, 7b, 8a,b, 9a,b, 10b, 11a,b, 12b,c, 13b, 14a,b, 15, 16a,b, 17a,b, 18, 19b, 20b. See http://www.rsc.org/suppdata/p1/b2/b203482d/. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b203482d] [Citation(s) in RCA: 13] [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: 11/21/2022]
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34
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Ajito K, Nagahara LA, Tryk DA, Hashimoto K, Fujishima A. Study of the Photochromic Properties of Amorphous MoO3 Films Using Raman Microscopy. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100044a028] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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36
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Kurihara K, Tanabe K, Yamamoto Y, Shinei R, Ajito K, Okonogi T. Synthesis and structure-activity relationships of new non-steroidal progesterone receptor ligands. Bioorg Med Chem Lett 1999; 9:1837-42. [PMID: 10406651 DOI: 10.1016/s0960-894x(99)00275-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In order to study structure-activity relationships, a series of new non-steroidal progesterone receptor ligands based on PF1092A was synthesized with structural modifications (mostly introduction or removal of a methyl group) at the 3-, 4-, 5-, 7- or 9-position in the 6-acetoxy-4a, 5, 6, 7-tetrahydro-3, 4a, 5-trimethylnaphtho[2,3-b]furan-2(4H)-one skeleton. Critical positions for high binding affinity to the progesterone receptor were identified.
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Affiliation(s)
- K Kurihara
- Drug Discovery, Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama, Japan
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37
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Kurihara KI, Ajito K, Shibahara S, Hara O, Araake M, Omoto S, Inouye S. Cladinose analogues of sixteen-membered macrolide antibiotics. VI. Synthesis of metabolically programmed, highly potent analogues of sixteen-membered macrolide antibiotics. J Antibiot (Tokyo) 1998; 51:771-85. [PMID: 9766469 DOI: 10.7164/antibiotics.51.771] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five novel 3-hydroxyl derivatives of sixteen-membered macrolide possessing 4-O-acyl-alpha-L-cladinose as a neutral sugar moiety were synthesized by using a combination of structurally stable silyl acetal protection and selective hydrogenolysis of a 3"-methylthiomethyl ether to a 3"-OMe group. Several derivatives having n-butyryl, i-butyryl and n-valeryl substituent at the 4"-OH group exhibited significant antibacterial activity in vitro. One of them, 4"-O-n-butyryl-3"-O-methylleucomycin V, showed improved therapeutic effect in mice.
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Affiliation(s)
- K I Kurihara
- Pharmaceutical Research Center, Meiji Seika Kaisha, LTD., Yokohama, Japan
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38
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Yamamoto Y, Ajito K, Ohtsuka Y. Model Study for Preparation of Asymmetric N,N′-Disubstituted Piperazine Library: Efficient Synthesis of Aryl Piperazine and Benzyl Piperazine Derivatives on the Solid Support. CHEM LETT 1998. [DOI: 10.1246/cl.1998.379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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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39
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Ajito K, Shimizu A, Shibahara S, Hara O, Kurihara K, Araake M, Tohyama K, Miyadoh S, Omoto S, Inouye S. Cladinose analogues of sixteen-membered macrolide antibiotics. V. Preparation of unsubstituted L-cladinose analogues: effect of methylation of a 3"-hydroxyl group on the bioactivity. J Antibiot (Tokyo) 1997; 50:366-9. [PMID: 9186567 DOI: 10.7164/antibiotics.50.366] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- K Ajito
- Pharmaceutical Research Center, Meiji Seika Kaisha, LTD., Yokohama, Japan
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40
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Ajito K, Kurihara K, Shibahara S, Hara O, Okonogi T, Kikuchi N, Araake M, Suzuki H, Omoto S, Inouye S. Cladinose analogues of sixteen-membered macrolide antibiotics. IV. Improved therapeutic effects of 4-O-acyl-L-cladinose analogues of sixteen-membered macrolide antibiotics. J Antibiot (Tokyo) 1997; 50:150-61. [PMID: 9099226 DOI: 10.7164/antibiotics.50.150] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Six derivatives of sixteen-membered macrolides possessing 4-O-acyl-alpha-L-cladinose as a neutral sugar were synthesized via 3"-methylthiomethyl ether intermediates in reasonable yield. Introduction of a methyl group on the 3"-hydroxyl group of midecamycin A1 was effective for enhancing its antibacterial activity. All these derivatives exhibited excellent therapeutic effects in mice, and some of them showed improved pharmacokinetics compared with the natural antibiotics (mycarose type) in mice. Facile synthesis of 9-O-acylated analogues are also described.
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Affiliation(s)
- K Ajito
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama, Japan
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41
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Ajito K, Kurihara K, Shibahara S, Hara O, Shimizu A, Araake M, Omoto S. Cladinose analogues of sixteen-membered macrolide antibiotics. II. Preparation of pharmacokinetically improved analogues via biotransformation. J Antibiot (Tokyo) 1997; 50:92-5. [PMID: 9066773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- K Ajito
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd. Yokohama, Japan
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42
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Kurihara K, Kikuchi N, Ajito K. Cladinose analogues of sixteen-membered macrolide antibiotics. III. Efficient synthesis of 4-O-alkyl-L-cladinose analogues: improved antibacterial activities compatible with pharmacokinetics. J Antibiot (Tokyo) 1997; 50:32-44. [PMID: 9066764 DOI: 10.7164/antibiotics.50.32] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The synthesis and biological evaluation of sixteen-membered macrolides possessing a 4-O-alkyl-alpha-L-cladinosyl moiety as a neutral sugar are described. These potent novel derivatives have been efficiently synthesized avoiding glycosylations. Two hydroxyl groups in mycarose of the tri-(tert-butyldimethylsilyl) ether intermediate were successively alkylated. Sequential deprotections of silyl groups afforded 4-O-alkyl-L-cladinose analogues and 3,4-di-O-alkyl-L-mycarose analogues of leucomycin V. Some 4-O-alkyl-L-cladinose analogues exhibited potent antibacterial activities. The most active derivative, 3"-O-methyl-4"-O-(3-methylbutyl)leucomycin V, showed improved metabolic stability in rat plasma in vitro and extremely high concentrations in serum after oral administrations in mice and in hamsters.
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Affiliation(s)
- K Kurihara
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama, Japan
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43
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Nicolaou KC, Patron AP, Ajito K, Richter PK, Khatuya H, Bertinato P, Miller RA, Tomaszewski MJ. Total Synthesis of Swinholide A, Preswinholide A, and Hemiswinholide A. Chemistry 1996. [DOI: 10.1002/chem.19960020718] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.3] [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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44
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Kurihara K, Ajito K, Shibahara S, Ishizuka T, Hara O, Araake M, Omoto S. Cladinose analogues of sixteen-membered macrolide antibiotics. I. Synthesis of 4-O-alkyl-L-cladinose analogues via glycosylation. J Antibiot (Tokyo) 1996; 49:582-92. [PMID: 8698643 DOI: 10.7164/antibiotics.49.582] [Citation(s) in RCA: 13] [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: 02/01/2023]
Abstract
The synthesis and biological evaluation of sixteen-membered macrolides possessing a 4-O-alkyl-alpha-L-cladinosyl moiety as the neutral sugar are described. The nine novel derivatives have been synthesized by glycosylation with 1-thio sugars. The most active derivative of them showed prolonged antibacterial activity in rat plasma in vitro and improved pharmacokinetics.
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Affiliation(s)
- K Kurihara
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama, Japan
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Yang XM, Ajito K, Tryk DA, Hashimoto K, Fujishima A. Two-Dimensional Surface-Enhanced Raman Imaging of a Roughened Silver Electrode Surface with Adsorbed Pyridine and Comparison with AFM Images. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960048s] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- X. M. Yang
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - K. Ajito
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - D. A. Tryk
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - K. Hashimoto
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - A. Fujishima
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Affiliation(s)
- K. C. Nicolaou
- Department of Chemistry, The Scripps Research Institute 10666 N. Torrey Pines Road, La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive La Jolla, California 92093
| | - K. Ajito
- Department of Chemistry, The Scripps Research Institute 10666 N. Torrey Pines Road, La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive La Jolla, California 92093
| | - A. P. Patron
- Department of Chemistry, The Scripps Research Institute 10666 N. Torrey Pines Road, La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive La Jolla, California 92093
| | - H. Khatuya
- Department of Chemistry, The Scripps Research Institute 10666 N. Torrey Pines Road, La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive La Jolla, California 92093
| | - P. K. Richter
- Department of Chemistry, The Scripps Research Institute 10666 N. Torrey Pines Road, La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive La Jolla, California 92093
| | - P. Bertinato
- Department of Chemistry, The Scripps Research Institute 10666 N. Torrey Pines Road, La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive La Jolla, California 92093
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Nicolaou KC, Smith BM, Ajito K, Komatsu H, Gomez-Paloma L, Tor Y. DNA−Carbohydrate Interactions. Specific Binding of Head-to-Head and Head-to-Tail Dimers of the Calicheamicin Oligosaccharide to Duplex DNA. J Am Chem Soc 1996. [DOI: 10.1021/ja9538142] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. C. Nicolaou
- Department of Chemistry, The Scripps Research Institute 10666 North Torrey Pines Road La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive, La Jolla, California 92093
| | - B. M. Smith
- Department of Chemistry, The Scripps Research Institute 10666 North Torrey Pines Road La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive, La Jolla, California 92093
| | - K. Ajito
- Department of Chemistry, The Scripps Research Institute 10666 North Torrey Pines Road La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive, La Jolla, California 92093
| | - H. Komatsu
- Department of Chemistry, The Scripps Research Institute 10666 North Torrey Pines Road La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive, La Jolla, California 92093
| | - L. Gomez-Paloma
- Department of Chemistry, The Scripps Research Institute 10666 North Torrey Pines Road La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive, La Jolla, California 92093
| | - Y. Tor
- Department of Chemistry, The Scripps Research Institute 10666 North Torrey Pines Road La Jolla, California 92037 Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive, La Jolla, California 92093
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Liu C, Smith BM, Ajito K, Komatsu H, Gomez-Paloma L, Li T, Theodorakis EA, Nicolaou KC, Vogt PK. Sequence-selective carbohydrate-DNA interaction: dimeric and monomeric forms of the calicheamicin oligosaccharide interfere with transcription factor function. Proc Natl Acad Sci U S A 1996; 93:940-4. [PMID: 8570664 PMCID: PMC40163 DOI: 10.1073/pnas.93.2.940] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The synthetic oligosaccharide moiety of the antibiotic calicheamicin and the head-to-head dimer of this oligosaccharide are known to bind to the minor groove of DNA in a sequence-selective manner preferring distinct target sequences. We tested these carbohydrates for their ability to interfere with transcription factor function. The oligosaccharides inhibit binding of transcription factors to DNA in a sequence-selective manner, probably by inducing a conformational change in DNA structure. They also interfere with transcription by polymerase II in vitro. The effective concentrations of the oligosaccharides for inhibition of transcription factor binding and for transcriptional inhibition are in the micromolar range. The dimer is a significantly more active inhibitor than is the monomer.
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Affiliation(s)
- C Liu
- Department of Molecular and Experimental Medicine, Scripps Research Institute, La Jolla, CA 92037, USA
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Nicolaou KC, Ajito K, Komatsu H, Smith BM, Bertinato P, Gomez-Paloma L. DNA–carbohydrate interactions. Design and synthesis of a head-to-tail dimer of the calicheamicin oligosaccharide. Chem Commun (Camb) 1996. [DOI: 10.1039/cc9960001495] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ajito K, Sukamto J, Nagahara L, Hashimoto K, Fujishima A. Combined Raman and photoelectrochemical imaging system. Application to TiO2 films grown anodically on TiAg alloy. J Electroanal Chem (Lausanne) 1995. [DOI: 10.1016/0022-0728(95)03909-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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