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Hata M, Kadoya Y, Ueno J, Taki M, Kodera M. Dicopper Complexes of p-Cresol-2,6-bis(amide-tether-dpa 4-X) (X = MeO and Cl): Selective ROS Generation and Cytotoxicity Enhancement Controlled by Electronic and Hydrophobic Effects of the MeO and Cl Groups. Inorg Chem 2024; 63:13893-13902. [PMID: 39011904 DOI: 10.1021/acs.inorgchem.4c01072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Two new p-cresol-2,6-bis(amide-tether-dpa4-X) ligands (HL4-X, X = MeO and Cl) and their dicopper complexes [Cu2(μ-1,1-OAc)(μ-1,3-OAc)(L4-MeO)]Y (Y = PF6 1a, OAc 1b) and [Cu2(μ-1,3-OAc)2(L4-Cl)]Y (Y = ClO4 2a, OAc 2b) were synthesized. The electronic and hydrophobic effects of the MeO and Cl groups were examined compared with nonsubstituted complex [Cu2(μ-1,1-OAc)(μ-1,3-OAc)(L)]+ (3). The electronic effects were found in crystal structures, spectroscopic characterization, and redox potentials of these complexes. 1b and 2b were reduced to Cu(I)Cu(I) with sodium ascorbate and reductively activated O2 to produce H2O2 and HO•. The H2O2 release and HO• generation are promoted by the electronic effects. The hydrophobic effects increased the lipophilicity of 1b and 2b. Cellular ROS generation of 1b, 2b, and 3 was visualized by DCFH-DA. To examine the intracellular behavior, boron dipyrromethene (Bodipy)-modified complexes 4B and 5B corresponding to 1b and 2b were synthesized. These support that 1b and 2b are localized at the ER and Golgi apparatus. The cytotoxicity of 1b and 2b against various cell lines was examined by MTT assay. 1b and 2b were 7- and 41-fold more cytotoxic than 3. 1b generated ROS selectively in cancer cell but 2b nonselectively in cancer and normal cells, causing cancer- and normal-cell-selective cytotoxicity, respectively.
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Affiliation(s)
- Machi Hata
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe Kyoto 610-0321, Japan
| | - Yuki Kadoya
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe Kyoto 610-0321, Japan
| | - Jin Ueno
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe Kyoto 610-0321, Japan
| | - Masayasu Taki
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan
| | - Masahito Kodera
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe Kyoto 610-0321, Japan
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2
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Akiyama Y, Kimura K, Komatsu S, Takarada T, Maeda M, Kikuchi A. A Simple Colorimetric Assay of Bleomycin-Mediated DNA Cleavage Utilizing Double-Stranded DNA-Modified Gold Nanoparticles. Chembiochem 2023; 24:e202200451. [PMID: 36156837 PMCID: PMC10092608 DOI: 10.1002/cbic.202200451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/23/2022] [Indexed: 01/05/2023]
Abstract
A colorimetric assay of DNA cleavage by bleomycin (BLM) derivatives was developed utilizing high colloidal stability on double-stranded (ds) DNA-modified gold nanoparticles (dsDNA-AuNPs) possessing a cleavage site. The assay was performed using dsDNA-AuNPs treated with inactive BLM or activated BLM (Fe(II)⋅BLM). A 10-min exposure in dsDNA-AuNPs with inactive BLM treatment resulted in a rapid color change from red to purple because of salt-induced non-crosslinking aggregation of dsDNA-AuNPs. In contrast, the addition of active Fe(II)⋅BLM retained the red color, probably because of the formation of protruding structures at the outermost phase of dsDNA-AuNPs caused by BLM-mediated DNA cleavage. Furthermore, the results of our model experiments indicate that oxidative base release and DNA-cleavage pathways could be visually distinguished with color change. The present methodology was also applicable to model screening assays using several drugs with different mechanisms related to antitumor activity. These results strongly suggest that this assay with a rapid color change could lead to simple and efficient screening of potent antitumor agents.
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Affiliation(s)
- Yoshitsugu Akiyama
- Katsushika Division, Institute of Arts and Sciences, Tokyo University of Science, 6-3-1 Niijuku, 125-8585, Katsushika, Tokyo, Japan.,Department of Materials Science and Technology, Graduate School of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, 125-8585, Katsushika, Tokyo, Japan
| | - Kazunori Kimura
- Department of Materials Science and Technology, Graduate School of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, 125-8585, Katsushika, Tokyo, Japan
| | - Syuuhei Komatsu
- Department of Materials Science and Technology, Graduate School of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, 125-8585, Katsushika, Tokyo, Japan
| | - Tohru Takarada
- Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
| | - Mizuo Maeda
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
| | - Akihiko Kikuchi
- Department of Materials Science and Technology, Graduate School of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, 125-8585, Katsushika, Tokyo, Japan
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3
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Li X, Wu J, Tang W. General Strategy for the Synthesis of Rare Sugars via Ru(II)-Catalyzed and Boron-Mediated Selective Epimerization of 1,2- trans-Diols to 1,2- cis-Diols. J Am Chem Soc 2022; 144:3727-3736. [PMID: 35168319 DOI: 10.1021/jacs.1c13399] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Human glycans are primarily composed of nine common sugar building blocks. On the other hand, several hundred monosaccharides have been discovered in bacteria and most of them are not readily available. The ability to access these rare sugars and the corresponding glycoconjugates can facilitate the studies of various fundamentally important biological processes in bacteria, including interactions between microbiota and the human host. Many rare sugars also exist in a variety of natural products and pharmaceutical reagents with significant biological activities. Although several methods have been developed for the synthesis of rare monosaccharides, most of them involve lengthy steps. Herein, we report an efficient and general strategy that can provide access to rare sugars from commercially available common monosaccharides via a one-step Ru(II)-catalyzed and boron-mediated selective epimerization of 1,2-trans-diols to 1,2-cis-diols. The formation of boronate esters drives the equilibrium toward 1,2-cis-diol products, which can be immediately used for further selective functionalization and glycosylation. The utility of this strategy was demonstrated by the efficient construction of glycoside skeletons in natural products or bioactive compounds.
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Affiliation(s)
- Xiaolei Li
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Jicheng Wu
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Weiping Tang
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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4
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Hata M, Saito I, Kadoya Y, Tanaka Y, Hitomi Y, Kodera M. Enhancement of Cancer-Cell-Selective Cytotoxicity by a Dicopper Complex with Phenanthrene Amide-Tether Ligand Conjugate via Mitochondrial Apoptosis. Dalton Trans 2022; 51:4720-4727. [DOI: 10.1039/d1dt02868e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dicopper complexes [Cu2(μ-OH)(Ln)](ClO4)2 [n = 1 (1) and 2 (2)] with a novel phenanthrene amide-tether ligand conjugate (HL1) and the original p-cresol-2,6-bis(amidecyclen) (HL2) were synthesized. A phenanthrene unit of 1...
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Kong J, Xiong Y, Duan Y, Zhu X. Deoxidized gulose moiety attenuates the pulmonary toxicity of 6'-deoxy-bleomycin Z without effect on its antitumor activity. Biomed Pharmacother 2021; 136:111222. [PMID: 33450497 DOI: 10.1016/j.biopha.2021.111222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/29/2020] [Accepted: 12/31/2020] [Indexed: 11/18/2022] Open
Abstract
Bleomycins (BLMs) are broad-spectrum antitumor drugs, but the dose-dependent lung toxicity has restricted their therapeutic applications. Many efforts have contributed to develop novel BLM analogues, but mainly focused on single functional domain owing to the structural complexity of BLM. Benefit from the engineered production of two novel analogues 6'-deoxy-BLM Z (6'-DO-BLM Z) and BLM Z, they together with clinical BLM-sulfate comprised a good model with varied sugar or C-terminal domain in any two of them, allowing us to study their structure-activity relationships pairwise. Our investigations suggested the biological activities of BLM or its analogues are mainly depended on the C-terminal amine, while the changed C-terminal amine endowed BLM Z with much higher pulmonary toxicity comparing to BLM-sulfate, whereas the deoxidized gulose unit with same C-terminal amine evidently attenuated the pulmonary toxicity of 6'-DO-BLM Z without effect on antitumor activity. Further mechanistic studies revealed that the alleviation of pulmonary toxicity in 6'-DO-BLM Z by a slight change in the sugar moiety could attribute to the decrease of ROS production and thereby reduce the subsequent caspase-1 activity and resulting inflammatory response. Therefore, the synergistic modifications on C-terminal amine and sugar moiety provide new insights to efficiently develop potential BLM candidate with good clinical performance.
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Affiliation(s)
- Jieqian Kong
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan, 410013, China
| | - Yi Xiong
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan, 410013, China
| | - Yanwen Duan
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan, 410013, China; Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan, 410011, China; National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan, 410011, China.
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan, 410013, China; National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan, 410011, China.
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Detection of bleomycin and its hydrolase by the cationic surfactant-doped liquid crystal-based sensing platform. Anal Chim Acta 2021; 1150:338247. [PMID: 33583545 DOI: 10.1016/j.aca.2021.338247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 01/07/2023]
Abstract
Bleomycin (BLM) is a broadly used antibiotic to treat different types of cancer. It can be hydrolyzed by bleomycin hydrolase (BLMH), which eventually influences the anti-tumor efficacy of BLM. Therefore, it is particularly important to detect BLM and BLMH. Herein, we demonstrated highly sensitive detection of BLM and BLMH by a simple and convenient liquid crystal (LC)-based sensing platform for the first time. 5CB (a nematic LC) doped with the cationic surfactant OTAB was working as the sensing platform. When the OTAB-laden 5CB interface was in contact with an aqueous solution of ssDNA, LCs displayed a bright image due to disruption of the arrangement of OTAB monolayers by ssDNA, indicating the planar orientation of LCs at the aqueous/LC interface. When BLM·Fe(II) and ssDNA were both present in the aqueous solution, ssDNA underwent irreversible cleavage, which prevented disruption of the arrangement of OTAB monolayers. Accordingly, LCs showed a dark image, suggesting the homeotropic orientation of LCs at the aqueous/LC interface. However, when BLM·Fe(II) was enzymatically hydrolyzed by BLMH, LCs remained the bright image. This approach showed high sensitivity for the detection of BLM and BLMH with the limits of detection of 0.2 nM and 0.3 ng/mL, respectively. Besides, the detection of BLM and BLMH was successfully achieved in human serum. This method has the advantages of high sensitivity, robust stability, simple operation, low cost, and easy detection through naked eyes, which makes it a potential candidate for applications in clinical analysis.
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Xiong Y, Kong J, Yi S, Feng X, Duan Y, Zhu X. Surfactin Ameliorated the Internalization and Inhibitory Performances of Bleomycin Family Compounds in Tumor Cells. Mol Pharm 2020; 17:2125-2134. [DOI: 10.1021/acs.molpharmaceut.0c00281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yi Xiong
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan 410013, China
| | - Jieqian Kong
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan 410013, China
| | - Sirun Yi
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan 410013, China
| | - Xueqiong Feng
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan 410013, China
| | - Yanwen Duan
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan 410013, China
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan 410011, China
- National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan 410011, China
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine at Central South University, Changsha, Hunan 410013, China
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan 410011, China
- National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan 410011, China
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8
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Chen H, Cui J, Wang P, Wang X, Wen J. Enhancement of bleomycin production in Streptomyces verticillus through global metabolic regulation of N-acetylglucosamine and assisted metabolic profiling analysis. Microb Cell Fact 2020; 19:32. [PMID: 32054531 PMCID: PMC7017467 DOI: 10.1186/s12934-020-01301-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/05/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Bleomycin is a broad-spectrum glycopeptide antitumor antibiotic produced by Streptomyces verticillus. Clinically, the mixture of bleomycin A2 and bleomycin B2 is widely used in combination with other drugs for the treatment of various cancers. As a secondary metabolite, the biosynthesis of bleomycin is precisely controlled by the complex extra-/intracellular regulation mechanisms, it is imperative to investigate the global metabolic and regulatory system involved in bleomycin biosynthesis for increasing bleomycin production. RESULTS N-acetylglucosamine (GlcNAc), the vital signaling molecule controlling the onset of development and antibiotic synthesis in Streptomyces, was found to increase the yields of bleomycins significantly in chemically defined medium. To mine the gene information relevant to GlcNAc metabolism, the DNA sequences of dasR-dasA-dasBCD-nagB and nagKA in S. verticillus were determined by chromosome walking. From the results of Real time fluorescence quantitative PCR (RT-qPCR) and electrophoretic mobility shift assays (EMSAs), the repression of the expression of nagB and nagKA by the global regulator DasR was released under induction with GlcNAc. The relief of blmT expression repression by BlmR was the main reason for increased bleomycin production. DasR, however, could not directly affect the expression of the pathway-specific repressor BlmR in the bleomycins gene cluster. With at the beginning of bleomycin synthesis, the supply of the specific precursor GDP-mannose played the key role in bleomycin production. Genetic engineering of the GDP-mannose synthesis pathway indicated that phosphomannose isomerase (ManA) and phosphomannomutase (ManB) were key enzymes for bleomycins synthesis. Here, the blmT, manA and manB co-expression strain OBlmT/ManAB was constructed. Based on GlcNAc regulation and assisted metabolic profiling analysis, the yields of bleomycin A2 and B2 were ultimately increased to 61.79 and 36.9 mg/L, respectively. CONCLUSIONS Under GlcNAc induction, the elevated production of bleomycins was mainly associated with the alleviation of the inhibition of BlmT, so blmT and specific precursor synthesis pathways were genetically engineered for bleomycins production improvement. Combination with subsequent metabolomics analysis not only effectively increased the bleomycin yield, but also extended the utilization of chitin-derived substrates in microbial-based antibiotic production.
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Affiliation(s)
- Hong Chen
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Jiaqi Cui
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Pan Wang
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Xin Wang
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Jianping Wen
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, People's Republic of China. .,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China.
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Mu Y, Zhang J, Liu Y, Ma J, Jiang D, Zhang X, Yi X, Cheng K, Shen S, Yang Y, Zhuang R, Zhang Y. CD226 deficiency on regulatory T cells aggravates renal fibrosis via up‐regulation of Th2 cytokines through miR‐340. J Leukoc Biol 2019; 107:573-587. [PMID: 31802539 DOI: 10.1002/jlb.2ma1119-174rr] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 12/11/2022] Open
Affiliation(s)
- Yang Mu
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
- Department of Obstetrics and Gynecology Second Affiliated Hospital of Harbin Medical University Harbin Heilongjiang China
| | - Jinxue Zhang
- Orthopedic Department of Tangdu Hospital Fourth Military Medical University Xi'an Shaanxi Province China
| | - Yongming Liu
- Orthopedic Department of Tangdu Hospital Fourth Military Medical University Xi'an Shaanxi Province China
| | - Jingchang Ma
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
| | - Dongxu Jiang
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
| | - Xuexin Zhang
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
- Department of Obstetrics and Gynecology Second Affiliated Hospital of Harbin Medical University Harbin Heilongjiang China
| | - Xin Yi
- Orthopedic Department of Tangdu Hospital Fourth Military Medical University Xi'an Shaanxi Province China
| | - Kun Cheng
- Transplant Immunology Laboratory Fourth Military Medical University Xi'an Shaanxi China
| | - Shen Shen
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
- Transplant Immunology Laboratory Fourth Military Medical University Xi'an Shaanxi China
| | - Yixin Yang
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
| | - Ran Zhuang
- Department of Immunology Fourth Military Medical University Xi'an Shaanxi Province China
- Transplant Immunology Laboratory Fourth Military Medical University Xi'an Shaanxi China
| | - Yuan Zhang
- Institute of Medical Research Northwest Polytechnic University Xi'an Shaanxi China
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10
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Kadoya Y, Fukui K, Hata M, Miyano R, Hitomi Y, Yanagisawa S, Kubo M, Kodera M. Oxidative DNA Cleavage, Formation of μ-1,1-Hydroperoxo Species, and Cytotoxicity of Dicopper(II) Complex Supported by a p-Cresol-Derived Amide-Tether Ligand. Inorg Chem 2019; 58:14294-14298. [PMID: 31599154 DOI: 10.1021/acs.inorgchem.9b02093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Metal complexes to promote oxidative DNA cleavage by H2O2 are desirable as anticancer drugs. A dicopper(II) complex of known p-cresol-derived methylene-tether ligand Hbcc [Cu2(bcc)]3+ did not promote DNA cleavage by H2O2. Here, we synthesized a new p-cresol-derived amide-tether one, 2,6-bis(1,4,7,10-tetrazacyclododecyl-1-carboxyamide)-p-cresol (Hbcamide). A dicopper(II) complex of the new ligand [Cu2(μ-OH)(bcamide)]2+ was structurally characterized. This complex promoted the oxidative cleavage of supercoiled plasmid pUC19 DNA (Form I) with H2O2 at pH 6.0-8.2 to give Forms II and III. The reaction was largely accelerated in a high pH region. A μ-1,1-hydroperoxo species was formed as the active species and spectroscopically identified. The amide-tether complex is more effective in cytotoxicity against HeLa cells than the methylene-tether one.
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Affiliation(s)
- Yuki Kadoya
- Department of Molecular Chemistry and Biochemistry , Doshisha University , Kyotanabe Kyoto 610-0321 , Japan
| | - Katsuki Fukui
- Department of Molecular Chemistry and Biochemistry , Doshisha University , Kyotanabe Kyoto 610-0321 , Japan
| | - Machi Hata
- Department of Molecular Chemistry and Biochemistry , Doshisha University , Kyotanabe Kyoto 610-0321 , Japan
| | - Risa Miyano
- Department of Molecular Chemistry and Biochemistry , Doshisha University , Kyotanabe Kyoto 610-0321 , Japan
| | - Yutaka Hitomi
- Department of Molecular Chemistry and Biochemistry , Doshisha University , Kyotanabe Kyoto 610-0321 , Japan
| | - Sachiko Yanagisawa
- Department of Life Science , University of Hyogo , Kouto 2-1 , Ako Kamigori Hyogo 678-1297 , Japan
| | - Minoru Kubo
- Department of Life Science , University of Hyogo , Kouto 2-1 , Ako Kamigori Hyogo 678-1297 , Japan
| | - Masahito Kodera
- Department of Molecular Chemistry and Biochemistry , Doshisha University , Kyotanabe Kyoto 610-0321 , Japan
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11
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Crnovcic I, Gan F, Yang D, Dong LB, Schultz PG, Shen B. Activities of recombinant human bleomycin hydrolase on bleomycins and engineered analogues revealing new opportunities to overcome bleomycin-induced pulmonary toxicity. Bioorg Med Chem Lett 2018; 28:2670-2674. [PMID: 29730026 DOI: 10.1016/j.bmcl.2018.04.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/26/2018] [Accepted: 04/27/2018] [Indexed: 02/08/2023]
Abstract
The bleomycins (BLMs) are widely used in combination therapies for the treatment of various cancers. Dose-dependent and cumulative pulmonary toxicity is the major cause of BLM-associated morbidity, limiting the broad uses of BLMs as anticancer drugs. The organ specificity of BLM-induced toxicity has been correlated with the expression of the hBLMH gene, encoding the human bleomycin hydrolase (hBLMH), which is poorly expressed in the lung. hBLMH hydrolyzes BLMs into the biologically inactive deamido BLMs, thereby protecting organs from BLM-induced toxicity. Here we report (i) expression of hBLMH and production and isolation of recombinant human bleomycin hydrolase (rhBLMH) from E. coli, (ii) structural characterization of deamido BLM A2 and B2 isolated from rhBLMH-catalyzed hydrolysis of BLM A2 and B2, and (iii) kinetic characterization of the rhBLMH-catalyzed hydrolysis of BLM A2 and B2, in comparison with five BLM analogues. rhBLMH from E. coli catalyzes rapid and efficient hydrolysis of all BLMs tested, exhibiting a superior catalytic efficiency for BLM B2. These findings reveal new opportunities to overcome BLM-induced pulmonary toxicity in chemotherapies, potentially by exploring BLM B2 as the preferred congener, engineering designer BLMs with optimized activity for rhBLMH, or co-administrating rhBLMH directly into the lung as a potential protein therapeutic.
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Affiliation(s)
- Ivana Crnovcic
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458, United States
| | - Fei Gan
- California Institute for Biomedical Research, La Jolla, CA 92037, United States
| | - Dong Yang
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458, United States
| | - Liao-Bin Dong
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458, United States
| | - Peter G Schultz
- California Institute for Biomedical Research, La Jolla, CA 92037, United States; Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, United States
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458, United States; Department of Molecular Medicine, The Scripps Research Institute, Jupiter, FL 33458, United States; Natural Products Library Initiative at The Scripps Research Institute, The Scripps Research Institute, Jupiter, FL 33458, United States.
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12
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Murray V, Chen JK, Yang D, Shen B. The genome-wide sequence specificity of DNA cleavage by bleomycin analogues in human cells. Bioorg Med Chem 2018; 26:4168-4178. [PMID: 30006142 DOI: 10.1016/j.bmc.2018.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 06/26/2018] [Accepted: 07/04/2018] [Indexed: 02/06/2023]
Abstract
Bleomycin (BLM) is a cancer chemotherapeutic agent that cleaves cellular DNA at specific sequences. Using next-generation Illumina sequencing, the genome-wide sequence specificity of DNA cleavage by two BLM analogues, 6'-deoxy-BLM Z and zorbamycin (ZBM), was determined in human HeLa cells and compared with BLM. Over 200 million double-strand breaks were examined for each sample, and the 50,000 highest intensity cleavage sites were analysed. It was found that the DNA sequence specificity of the BLM analogues in human cells was different to BLM, especially at the cleavage site (position "0") and the "+1" position. In human cells, the 6'-deoxy-BLM Z had a preference for 5'-GTGY*MC (where * is the cleavage site, Y is C or T, M is A or C); it was 5'-GTGY*MCA for ZBM; and 5'-GTGT*AC for BLM. With cellular DNA, the highest ranked tetranucleotides were 5'-TGC*C and 5'-TGT*A for 6'-deoxy-BLM Z; 5'-TGC*C, 5'-TGT*A and 5'-TGC*A for ZBM; and 5'-TGT*A for BLM. In purified human genomic DNA, the DNA sequence preference was 5'-TGT*A for 6'-deoxy-BLM, 5'-RTGY*AYR (where R is G or A) for ZBM, and 5'-TGT*A for BLM. Thus, the sequence specificity of the BLM analogue, 6'-deoxy-BLM Z, was similar to BLM in purified human DNA, while ZBM was different.
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Affiliation(s)
- Vincent Murray
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Jon K Chen
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - Dong Yang
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - Ben Shen
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
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13
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Kong J, Yi L, Xiong Y, Huang Y, Yang D, Yan X, Shen B, Duan Y, Zhu X. The discovery and development of microbial bleomycin analogues. Appl Microbiol Biotechnol 2018; 102:6791-6798. [DOI: 10.1007/s00253-018-9129-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 05/21/2018] [Accepted: 05/22/2018] [Indexed: 11/29/2022]
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14
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Murray V, Chen JK, Chung LH. The Interaction of the Metallo-Glycopeptide Anti-Tumour Drug Bleomycin with DNA. Int J Mol Sci 2018; 19:E1372. [PMID: 29734689 PMCID: PMC5983701 DOI: 10.3390/ijms19051372] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 04/24/2018] [Accepted: 04/24/2018] [Indexed: 11/17/2022] Open
Abstract
The cancer chemotherapeutic drug, bleomycin, is clinically used to treat several neoplasms including testicular and ovarian cancers. Bleomycin is a metallo-glycopeptide antibiotic that requires a transition metal ion, usually Fe(II), for activity. In this review, the properties of bleomycin are examined, especially the interaction of bleomycin with DNA. A Fe(II)-bleomycin complex is capable of DNA cleavage and this process is thought to be the major determinant for the cytotoxicity of bleomycin. The DNA sequence specificity of bleomycin cleavage is found to at 5′-GT* and 5′-GC* dinucleotides (where * indicates the cleaved nucleotide). Using next-generation DNA sequencing, over 200 million double-strand breaks were analysed, and an expanded bleomycin sequence specificity was found to be 5′-RTGT*AY (where R is G or A and Y is T or C) in cellular DNA and 5′-TGT*AT in purified DNA. The different environment of cellular DNA compared to purified DNA was proposed to be responsible for the difference. A number of bleomycin analogues have been examined and their interaction with DNA is also discussed. In particular, the production of bleomycin analogues via genetic manipulation of the modular non-ribosomal peptide synthetases and polyketide synthases in the bleomycin gene cluster is reviewed. The prospects for the synthesis of bleomycin analogues with increased effectiveness as cancer chemotherapeutic agents is also explored.
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Affiliation(s)
- Vincent Murray
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Jon K Chen
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Long H Chung
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
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15
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Stein N, Tsukerman P, Mandelboim O. The paired receptors TIGIT and DNAM-1 as targets for therapeutic antibodies. Hum Antibodies 2018; 25:111-119. [PMID: 28035916 DOI: 10.3233/hab-160307] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
One of the most exciting fields in modern medicine is immunotherapy, treatment which looks to harness the power of the immune system to fight disease. A particularly effective strategy uses antibodies designed to influence the activity levels of the immune system. Here we look at two receptors - TIGIT and DNAM-1 - which bind the same ligands but have opposite effects on immune cells, earning them the label `paired receptors'. Importantly, natural killer cells and cytotoxic T cells express both of these receptors, and in certain cases their effector functions are dictated by TIGIT or DNAM-1 signaling. Agonist and antagonist antibodies targeting either TIGIT or DNAM-1 present many therapeutic options for diseases spanning from cancer to auto-immunity. In this review we present cases in which the modulation of these receptors holds potential for the development of novel therapies.
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MESH Headings
- Antigens, Differentiation, T-Lymphocyte/genetics
- Antigens, Differentiation, T-Lymphocyte/immunology
- Antineoplastic Agents, Immunological/therapeutic use
- Autoimmune Diseases/drug therapy
- Autoimmune Diseases/genetics
- Autoimmune Diseases/immunology
- Autoimmune Diseases/pathology
- Gene Expression Regulation
- Humans
- Immunotherapy/methods
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Killer Cells, Natural/pathology
- Neoplasms/drug therapy
- Neoplasms/genetics
- Neoplasms/immunology
- Neoplasms/pathology
- Protein Binding
- Receptor Cross-Talk/immunology
- Receptors, Immunologic/agonists
- Receptors, Immunologic/antagonists & inhibitors
- Receptors, Immunologic/genetics
- Receptors, Immunologic/immunology
- Signal Transduction
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/pathology
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16
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Strain improvement by combined UV mutagenesis and ribosome engineering and subsequent fermentation optimization for enhanced 6'-deoxy-bleomycin Z production. Appl Microbiol Biotechnol 2017; 102:1651-1661. [PMID: 29279956 DOI: 10.1007/s00253-017-8705-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/04/2017] [Accepted: 12/07/2017] [Indexed: 10/18/2022]
Abstract
The bleomycins (BLMs) are important clinical drugs extensively used in combination chemotherapy for the treatment of various cancers. Dose-dependent lung toxicity and the development of drug resistance have restricted their wide applications. 6'-Deoxy-BLM Z, a recently engineered BLM analogue with improved antitumor activity, has the potential to be developed into the next-generation BLM anticancer drug. However, its low titer in the recombinant strain Streptomyces flavoviridis SB9026 has hampered current efforts, which require sufficient compound, to pursue preclinical studies and subsequent clinical development. Here, we report the strain improvement by combined UV mutagenesis and ribosome engineering, as well as the fermentation optimization, for enhanced 6'-deoxy-BLM production. A high producer, named S. flavoviridis G-4F12, was successfully isolated, producing 6'-deoxy-BLM at above 70 mg/L under the optimized fermentation conditions, representing a sevenfold increase in comparison with that of the original producer. These findings demonstrated the effectiveness of combined empirical breeding methods in strain improvement and set the stage for sustainable production of 6'-deoxy-BLM via pilot-scale microbial fermentation.
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17
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Che R, Zhu Q, Yu J, Li J, Yu J, Lu W. Syntheses of two kinds of disaccharide subunits of antitumor antibiotic bleomycins. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Yang D, Hindra, Dong LB, Crnovcic I, Shen B. Engineered production and evaluation of 6'-deoxy-tallysomycin H-1 revealing new insights into the structure-activity relationship of the anticancer drug bleomycin. J Antibiot (Tokyo) 2017; 71:ja201793. [PMID: 28831149 DOI: 10.1038/ja.2017.93] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/30/2017] [Accepted: 07/07/2017] [Indexed: 11/09/2022]
Abstract
The bleomycins (BLMs), a family of glycopeptide antibiotics, are currently used clinically in combination with a number of other agents for the treatment of malignant tumors. Other members of the BLM family include tallysomycins (TLMs), phleomycins and zorbamycin (ZBM). We previously cloned and characterized the biosynthetic gene clusters for BLMs, TLMs and ZBM. Applications of combinatorial biosynthesis strategies to the three biosynthetic machineries enabled the engineered production of several BLM analogs with unique structural characteristics and varying DNA cleavage activities, thereby providing an outstanding opportunity to study the structure-activity relationship (SAR) for the BLM family of anticancer drugs. We now report the engineered production of a new BLM-TLM-ZBM hybrid metabolite, named 6'-deoxy-TLM H-1, which consists of the 22-desmethyl-BLM aglycone, the TLM A C-terminal amine and the ZBM disaccharide, by heterologous expression of the zbmGL genes from the ZBM biosynthetic gene cluster in the Streptoalloteichus hindustanus ΔtlmH mutant strain SB8005. Evaluation of the DNA cleavage activities of 6'-deoxy-TLM H-1 as a measurement for its potential anticancer activity, in comparison with TLM H-1 and BLM A2, reveals new insight into the SAR of BLM family of anticancer drugs.The Journal of Antibiotics advance online publication, 23 August 2017; doi:10.1038/ja.2017.93.
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Affiliation(s)
- Dong Yang
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA
| | - Hindra
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA
| | - Liao-Bin Dong
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA
| | - Ivana Crnovcic
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA
- Department of Molecular Medicine, The Scripps Research Institute, Jupiter, FL, USA
- Natural Products Library Initiative at The Scripps Research Institute, The Scripps Research Institute, Jupiter, FL, USA
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19
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Nomura A, Iwamoto Y, Arakawa K, Kashida A, Kodera M, Hitomi Y. DNA Cleavage through Reductive Dioxygen Activation by Iron-Bleomycin Mimics with Carboxamido Ligation: Correlation between DNA Cleavage Efficacy and Redox Potential. CHEM LETT 2017. [DOI: 10.1246/cl.170354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Akiko Nomura
- Center for Nanoscience Research, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Yuji Iwamoto
- Center for Nanoscience Research, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Kengo Arakawa
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Akihiro Kashida
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Masahito Kodera
- Center for Nanoscience Research, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Yutaka Hitomi
- Center for Nanoscience Research, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
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20
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Abstract
Covering: July 2012 to June 2015. Previous review: Nat. Prod. Rep., 2013, 30, 869-915The structurally diverse imidazole-, oxazole-, and thiazole-containing secondary metabolites are widely distributed in terrestrial and marine environments, and exhibit extensive pharmacological activities. In this review the latest progress involving the isolation, biological activities, and chemical and biogenetic synthesis studies on these natural products has been summarized.
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Affiliation(s)
- Zhong Jin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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21
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2011-2012. MASS SPECTROMETRY REVIEWS 2017; 36:255-422. [PMID: 26270629 DOI: 10.1002/mas.21471] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 01/15/2015] [Indexed: 06/04/2023]
Abstract
This review is the seventh update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2012. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, and fragmentation are covered in the first part of the review and applications to various structural types constitute the remainder. The main groups of compound are oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2015 Wiley Periodicals, Inc. Mass Spec Rev 36:255-422, 2017.
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Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford, OX1 3QU, UK
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22
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Hindra, Yang D, Teng Q, Dong LB, Crnovčić I, Huang T, Ge H, Shen B. Genome Mining of Streptomyces mobaraensis DSM40847 as a Bleomycin Producer Providing a Biotechnology Platform To Engineer Designer Bleomycin Analogues. Org Lett 2017; 19:1386-1389. [PMID: 28256838 DOI: 10.1021/acs.orglett.7b00283] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Streptomyces mobaraensis DSM40847 has been identified by genome mining and confirmed to be a new bleomycin (BLM) producer. Manipulation of BLM biosynthesis in S. mobaraensis has been demonstrated, as exemplified by the engineered production of 6'-deoxy-BLM A2, providing a biotechnology platform for BLM biosynthesis and engineering. Comparison of DNA cleavage efficiency and kinetics among 6'-deoxy-BLM A2 and selected analogues supports the wisdom of altering the disaccharide moiety to fine-tune BLM activity.
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Affiliation(s)
- Hindra
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Dong Yang
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Qihui Teng
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Liao-Bin Dong
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Ivana Crnovčić
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Tingting Huang
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Huiming Ge
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Ben Shen
- Department of Chemistry, ‡Department of Molecular Medicine, §Natural Products Library Initiative at the Scripps Research Institute, The Scripps Research Institute , Jupiter, Florida 33458, United States
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23
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Bleomycin analogues preferentially cleave at the transcription start sites of actively transcribed genes in human cells. Int J Biochem Cell Biol 2017; 85:56-65. [PMID: 28167289 DOI: 10.1016/j.biocel.2017.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 01/23/2023]
Abstract
Bleomycin (BLM) is a cancer chemotherapeutic agent that is used in the treatment of several types of tumours. The cytotoxicity of three BLM analogues, BLM Z, 6'-deoxy-BLM Z and zorbamycin (ZBM), was determined in human HeLa cells in comparison with BLM. It was found that the IC50 values were 2.9μM for 6'-deoxy-BLM Z, 3.2μM for BLM Z, 4.4μM for BLM and 7.9μM for ZBM in HeLa cells. Using next-generation Illumina DNA sequencing techniques, the genome-wide cleavage of DNA by the BLM analogues was determined in human HeLa cells and compared with BLM. It was ascertained that BLM, 6'-deoxy-BLM Z and ZBM preferentially cleaved at the transcription start sites of actively transcribed genes in human cells. The degree of preferential cleavage at the transcription start sites was quantified and an inverse correlation with the IC50 values was observed. This indicated that the degree of preferential cleavage at transcription start sites is an important component in determining the cytotoxicity of BLM analogues.
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24
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Zorbamycin has a different DNA sequence selectivity compared with bleomycin and analogues. Bioorg Med Chem 2016; 24:6094-6101. [PMID: 27745992 DOI: 10.1016/j.bmc.2016.09.072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/28/2016] [Accepted: 09/29/2016] [Indexed: 01/05/2023]
Abstract
Bleomycin (BLM) is used clinically in combination with a number of other agents for the treatment of several types of tumours. Members of the BLM family of drugs include zorbamycin (ZBM), phleomycin D1, BLM A2 and BLM B2. By manipulating the BLM biosynthetic machinery, we have produced two new BLM analogues, BLM Z and 6'-deoxy-BLM Z, with the latter exhibiting significantly improved DNA cleavage activity. Here we determined the DNA sequence specificity of BLM Z, 6'-deoxy-BLM Z and ZBM, in comparison with BLM, with high precision using purified plasmid DNA and our recently developed technique. It was found that ZBM had a different DNA sequence specificity compared with BLM and the BLM analogues. While BLM and the BLM analogues showed a similar DNA sequence specificity, with TGTA sequences as the main site of cleavage, ZBM exhibited a distinct DNA sequence specificity, with both TGTA and TGTG as the predominant cleavage sites. These differences in DNA sequence specificity are discussed in relation to the structures of ZBM, BLM and the BLM analogues. Our findings support the strategy of manipulating the BLM biosynthetic machinery for the production of novel BLM analogues, difficult to prepare by total synthesis; some of which could have beneficial cancer chemotherapeutic properties.
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25
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Chen JK, Murray V. The determination of the DNA sequence specificity of bleomycin-induced abasic sites. J Biol Inorg Chem 2016; 21:395-406. [PMID: 26940956 DOI: 10.1007/s00775-016-1349-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 02/22/2016] [Indexed: 12/20/2022]
Abstract
The DNA sequence specificity of the cancer chemotherapeutic agent, bleomycin, was determined with high precision in purified plasmid DNA using an improved technique. This improved technique involved the labelling of the 5'- and 3'-ends of DNA with different fluorescent tags, followed by simultaneous cleavage by bleomycin and capillary electrophoresis with laser-induced fluorescence. This permitted the determination of bleomycin cleavage specificity with high accuracy since end-label bias was greatly reduced. Bleomycin produces single- and double-strand breaks, abasic sites and other base damage in DNA. This high-precision method was utilised to elucidate, for the first time, the DNA sequence specificity of bleomycin-induced DNA damage at abasic sites. This was accomplished using endonuclease IV that cleaves DNA at abasic sites after bleomycin damage. It was found that bleomycin-induced abasic sites formed at 5'-GC and 5'-GT sites while bleomycin-induced phosphodiester strand breaks formed mainly at 5'-GT dinucleotides. Since bleomycin-induced abasic sites are produced in the absence of molecular oxygen, this difference in DNA sequence specificity could be important in hypoxic tumour cells.
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Affiliation(s)
- Jon K Chen
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Vincent Murray
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia.
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26
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Elshahawi SI, Shaaban KA, Kharel MK, Thorson JS. A comprehensive review of glycosylated bacterial natural products. Chem Soc Rev 2015; 44:7591-697. [PMID: 25735878 PMCID: PMC4560691 DOI: 10.1039/c4cs00426d] [Citation(s) in RCA: 299] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A systematic analysis of all naturally-occurring glycosylated bacterial secondary metabolites reported in the scientific literature up through early 2013 is presented. This comprehensive analysis of 15 940 bacterial natural products revealed 3426 glycosides containing 344 distinct appended carbohydrates and highlights a range of unique opportunities for future biosynthetic study and glycodiversification efforts.
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Affiliation(s)
- Sherif I Elshahawi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Madan K Kharel
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, Maryland, USA
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
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27
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Rudolf JD, Bigelow L, Chang C, Cuff ME, Lohman JR, Chang CY, Ma M, Yang D, Clancy S, Babnigg G, Joachimiak A, Phillips GN, Shen B. Crystal Structure of the Zorbamycin-Binding Protein ZbmA, the Primary Self-Resistance Element in Streptomyces flavoviridis ATCC21892. Biochemistry 2015; 54:6842-51. [PMID: 26512730 DOI: 10.1021/acs.biochem.5b01008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The bleomycins (BLMs), tallysomycins (TLMs), phleomycin, and zorbamycin (ZBM) are members of the BLM family of glycopeptide-derived antitumor antibiotics. The BLM-producing Streptomyces verticillus ATCC15003 and the TLM-producing Streptoalloteichus hindustanus E465-94 ATCC31158 both possess at least two self-resistance elements, an N-acetyltransferase and a binding protein. The N-acetyltransferase provides resistance by disrupting the metal-binding domain of the antibiotic that is required for activity, while the binding protein confers resistance by sequestering the metal-bound antibiotic and preventing drug activation via molecular oxygen. We recently established that the ZBM producer, Streptomyces flavoviridis ATCC21892, lacks the N-acetyltransferase resistance gene and that the ZBM-binding protein, ZbmA, is sufficient to confer resistance in the producing strain. To investigate the resistance mechanism attributed to ZbmA, we determined the crystal structures of apo and Cu(II)-ZBM-bound ZbmA at high resolutions of 1.90 and 1.65 Å, respectively. A comparison and contrast with other structurally characterized members of the BLM-binding protein family revealed key differences in the protein-ligand binding environment that fine-tunes the ability of ZbmA to sequester metal-bound ZBM and supports drug sequestration as the primary resistance mechanism in the producing organisms of the BLM family of antitumor antibiotics.
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Affiliation(s)
- Jeffrey D Rudolf
- Department of Chemistry, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Lance Bigelow
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Changsoo Chang
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Marianne E Cuff
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Jeremy R Lohman
- Department of Chemistry, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Chin-Yuan Chang
- Department of Chemistry, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Ming Ma
- Department of Chemistry, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Dong Yang
- Department of Chemistry, The Scripps Research Institute , Jupiter, Florida 33458, United States
| | - Shonda Clancy
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Gyorgy Babnigg
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Andrzej Joachimiak
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - George N Phillips
- BioSciences at Rice and Department of Chemistry, Rice University , Houston, Texas 77251, United States
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute , Jupiter, Florida 33458, United States.,Department of Molecular Therapeutics, The Scripps Research Institute , Jupiter, Florida 33458, United States.,Natural Products Library Initiative, The Scripps Research Institute , Jupiter, Florida 33458, United States
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28
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Andros CC, Dubay RA, Mitchell KD, Chen A, Holmes DE, Kennedy DR. A novel application of radiomimetic compounds as antibiotic drugs. ACTA ACUST UNITED AC 2015; 67:1371-9. [PMID: 25920505 DOI: 10.1111/jphp.12432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 03/29/2015] [Indexed: 01/16/2023]
Abstract
OBJECTIVE This study aims to examine the potential of radiomimetic compounds as antimicrobial therapeutics, as the recent advances in radiomimetic targeting as well as rapid increase of multidrug resistant bacteria make these compounds attractive for future development. METHODS Representative radiomimetics from each of the three major categories was examined; C-1027 and neocarzinostatin from the protein-chromophore enediyne family; Calicheamicin from the non-protein chromophore enediyne family and Bleomycin and Tallysomycin S10b from the glycopeptide family. The activity of these compounds was examined against 12 distinct bacteria species. Inhibition was determined using disc diffusion assays and a subsequent examination of minimum inhibitory concentration of a representative organism. The onset of action of the compounds was also determined by incubating the organisms with drug in liquid media, before plating, and then determining if growth occurred. RESULTS We found that the radiomimetic glycopeptides were more active against Gram-negative species, while the enediynes were more effective against Gram-positive species. The radiomimetics also maintained their rapid onset of action, working as quickly as 5 min. CONCLUSIONS Radiomimetic compounds have activity against a wide variety of microorganisms and would support the development of radiomimetic-antibody conjugates as potential antibiotics as an option against severe bacterial infections.
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Affiliation(s)
- Christina C Andros
- Department of Pharmaceutical and Administrative Sciences, College of Pharmacy, Western New England University, Springfield, MA, USA
| | - Ryan A Dubay
- Department of Pharmaceutical and Administrative Sciences, College of Pharmacy, Western New England University, Springfield, MA, USA.,Department of Natural Sciences, College of Arts and Sciences, Western New England University, Springfield, MA, USA
| | - Kayleigh D Mitchell
- Department of Pharmaceutical and Administrative Sciences, College of Pharmacy, Western New England University, Springfield, MA, USA
| | - Aaron Chen
- Department of Natural Sciences, College of Arts and Sciences, Western New England University, Springfield, MA, USA
| | - Dawn E Holmes
- Department of Natural Sciences, College of Arts and Sciences, Western New England University, Springfield, MA, USA
| | - Daniel R Kennedy
- Department of Pharmaceutical and Administrative Sciences, College of Pharmacy, Western New England University, Springfield, MA, USA
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29
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Coughlin JM, Rudolf JD, Wendt-Pienkowski E, Wang L, Unsin C, Galm U, Yang D, Tao M, Shen B. BlmB and TlmB provide resistance to the bleomycin family of antitumor antibiotics by N-acetylating metal-free bleomycin, tallysomycin, phleomycin, and zorbamycin. Biochemistry 2014; 53:6901-9. [PMID: 25299801 PMCID: PMC4230324 DOI: 10.1021/bi501121e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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The bleomycin (BLM) family of glycopeptide-derived
antitumor antibiotics
consists of BLMs, tallysomycins (TLMs), phleomycins (PLMs), and zorbamycin
(ZBM). The self-resistant elements BlmB and TlmB, discovered from
the BLM- and TLM-producing organisms Streptomyces verticillus ATCC15003 and Streptoalloteichus hindustanus E465-94
ATCC31158, respectively, are N-acetyltransferases
that provide resistance to the producers by disrupting the metal-binding
domain of the antibiotics required for activity. Although each member
of the BLM family of antibiotics possesses a conserved metal-binding
domain, the structural differences between each member, namely, the
bithiazole moiety and C-terminal amine of BLMs, have been suggested
to instill substrate specificity within BlmB. Here we report that
BlmB and TlmB readily accept and acetylate BLMs, TLMs, PLMs, and ZBM in vitro but only in the metal-free forms. Kinetic analysis
of BlmB and TlmB reveals there is no strong preference or rate enhancement
for specific substrates, indicating that the structural differences
between each member of the BLM family play a negligible role in substrate
recognition, binding, or catalysis. Intriguingly, the zbm gene cluster from Streptomyces flavoviridis ATCC21892
does not contain an N-acetyltransferase, yet ZBM
is readily acetylated by BlmB and TlmB. We subsequently established
that S. flavoviridis lacks the homologue of BlmB
and TlmB, and ZbmA, the ZBM-binding protein, alone is sufficient to
provide ZBM resistance. We further confirmed that BlmB can indeed
confer resistance to ZBM in vivo in S. flavoviridis, introduction of which into wild-type S. flavoviridis further increases the level of resistance.
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Affiliation(s)
- Jane M Coughlin
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States
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Li B, Zheng YB, Li DD, Zhen YS. Preparation and evaluation of a CD13/APN-targeting and hydrolase-resistant conjugate that comprises pingyangmycin and NGR motif-integrated apoprotein. J Pharm Sci 2014; 103:1204-13. [PMID: 24504597 DOI: 10.1002/jps.23893] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 12/31/2013] [Accepted: 01/17/2014] [Indexed: 11/10/2022]
Abstract
We have chemically synthesized NGR-LDP-PYM, a novel CD13/aminopeptidase (APN)-targeting and hydrolase-resistant conjugate by cross-linking of the antitumor antibiotic pingyangmycin (bleomycin A5 , PYM) to an engineered NGR motif-integrated apoprotein (NGR-LDP) with a noncleavable linker. This protein-drug conjugate not only basically retains the original properties of PYM but also can specifically deliver PYM to the CD13/APN-expressing tumor cells. Furthermore, the resulting conjugate exhibits more resistance to hydrolysis of recombinant human bleomycin hydrolase than parental PYM. These results may be useful for improving the therapeutic efficacy of PYM and have implications in the treatment of PYM-refractory and CD13/APN-overexpressing tumors.
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Affiliation(s)
- Bin Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
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31
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Gregory MA, Kaja AL, Kendrew SG, Coates NJ, Warneck T, Nur-e-Alam M, Lill RE, Sheehan LS, Chudley L, Moss SJ, Sheridan RM, Quimpere M, Zhang MQ, Martin CJ, Wilkinson B. Structure guided design of improved anti-proliferative rapalogs through biosynthetic medicinal chemistry. Chem Sci 2013. [DOI: 10.1039/c2sc21833j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Smanski MJ, Casper J, Peterson RM, Yu Z, Rajski SR, Shen B. Expression of the platencin biosynthetic gene cluster in heterologous hosts yielding new platencin congeners. JOURNAL OF NATURAL PRODUCTS 2012; 75:2158-2167. [PMID: 23157615 PMCID: PMC3532557 DOI: 10.1021/np3005985] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Platensimycin (PTM) and platencin (PTN) are potent and selective inhibitors of bacterial and mammalian fatty acid synthases and have emerged as promising drug leads for both antibacterial and antidiabetic therapies. We have previously cloned and sequenced the PTM-PTN dual biosynthetic gene cluster from Streptomyces platensis MA7327 and the PTN biosynthetic gene cluster from S. platensis MA7339, the latter of which is composed of 31 genes encoding PTN biosynthesis, regulation, and resistance. We have also demonstrated that PTM or PTN production can be significantly improved upon inactivation of the pathway-specific regulator ptmR1 or ptnR1 in S. platensis MA7327 or MA7339, respectively. We now report engineered production of PTN and congeners in a heterologous Streptomyces host. Expression constructs containing the ptn biosynthetic gene cluster were engineered from SuperCos 1 library clones and introduced into five model Streptomyces hosts, and PTN production was achieved in Streptomyces lividans K4-114. Inactivation of ptnR1 was crucial for expression of the ptn biosynthetic gene cluster, thereby PTN production, in S. lividans K4-114. Six PTN congeners, five of which were new, were also isolated from the recombinant strain S. lividans SB12606, revealing new insights into PTN biosynthesis. Production of PTN in a model Streptomyces host provides new opportunities to apply combinatorial biosynthetic strategies to the PTN biosynthetic machinery for structural diversity.
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Affiliation(s)
- Michael J. Smanski
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Jeffrey Casper
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Ryan M. Peterson
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
- Department of Chemistry, The Scripps Research Institute, The Scripps Research Institute, Jupiter, Florida 33458, USA
| | - Zhiguo Yu
- Department of Chemistry, The Scripps Research Institute, The Scripps Research Institute, Jupiter, Florida 33458, USA
| | - Scott R. Rajski
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Ben Shen
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
- Department of Chemistry, The Scripps Research Institute, The Scripps Research Institute, Jupiter, Florida 33458, USA
- Department of Molecular Therapeutics, The Scripps Research Institute, The Scripps Research Institute, Jupiter, Florida 33458, USA
- Natural Products Library Initiative, The Scripps Research Institute, The Scripps Research Institute, Jupiter, Florida 33458, USA
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Adaptation of the neutral bacterial comet assay to assess antimicrobial-mediated DNA double-strand breaks in Escherichia coli. J Microbiol Methods 2012; 91:257-61. [PMID: 22940101 DOI: 10.1016/j.mimet.2012.08.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 08/17/2012] [Accepted: 08/18/2012] [Indexed: 11/22/2022]
Abstract
This study aimed to determine the mechanism of action of a natural antibacterial clay mineral mixture, designated as CB, by investigating the induction of DNA double-strand breaks (DSBs) in Escherichia coli. To quantify DNA damage upon exposure to soluble antimicrobial compounds, we modified a bacterial neutral comet assay, which associates the general length of an electrophoresed chromosome, or comet, with the degree of DSB-associated DNA damage. To appropriately account for antimicrobial-mediated strand fragmentation, suitable control reactions consisting of exposures to water, ethanol, kanamycin, and bleomycin were developed and optimized for the assay. Bacterial exposure to the CB clay resulted in significantly longer comet lengths, compared to water and kanamycin exposures, suggesting that the induction of DNA DSBs contributes to the killing activity of this antibacterial clay mineral mixture. The comet assay protocol described herein provides a general technique for evaluating soluble antimicrobial-derived DNA damage and for comparing DNA fragmentation between experimental and control assays.
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