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Ichimaru Y, Kato K, Okuno Y, Yamaguchi Y, Jin W, Fujita M, Otsuka M, Imai M, Kurosaki H. Design and synthesis of an anthranyl bridged optically active dinuclear iron(II)-ligand and evaluation of DNA-cleaving activity. Bioorg Med Chem Lett 2021; 35:127782. [PMID: 33422608 DOI: 10.1016/j.bmcl.2021.127782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/23/2020] [Accepted: 01/02/2021] [Indexed: 11/26/2022]
Abstract
It is necessary to design a ligand that is compatible with the target molecule to optimally use the DNA-cleaving ability of metal complexes. In this study, we synthesized an optically active dinuclear ligand, (1R,1'R,2R,2'R)-N1,N1'-(anthracene-1,8-diylbis(methylene))bis(N2,N2-bis(pyridin-2-ylmethyl)cyclohexane-1,2-diamine) (R-ABDC, 4a) and its enantiomer (S-ABDC, 4b). We then prepared their Fe(II) complexes by mixing the ligand with FeSO4·7H2O in situ and investigated DNA-cleaving activities using plasmid DNA in the presence of excess sodium ascorbate at atmospheric conditions. The Fe(II) complexes efficiently cleaved DNA and selectively recognized two consecutive A and/or T sequences.
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Affiliation(s)
- Yoshimi Ichimaru
- College of Pharmacy, Kinjo Gakuin University, 2-1723 Omori, Moriyamaku, Nagoya, Aichi 463-8521, Japan
| | - Koichi Kato
- College of Pharmacy, Kinjo Gakuin University, 2-1723 Omori, Moriyamaku, Nagoya, Aichi 463-8521, Japan
| | - Yoshinori Okuno
- Department of Medicinal Chemistry, Yokohama University of Pharmacy, 601 Matano-cho Totsuka-ku, Yokohama 245-0066 Japan.
| | - Yoshihiro Yamaguchi
- Environmental Safety Center, Kumamoto University, 39-1 Kurokami 2-Chome, Chuo-ku, Kumamoto 860-8555, Japan
| | - Wanchun Jin
- College of Pharmacy, Kinjo Gakuin University, 2-1723 Omori, Moriyamaku, Nagoya, Aichi 463-8521, Japan
| | - Mikako Fujita
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan
| | - Masami Otsuka
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan; Department of Drug Discovery, Science Farm Ltd., 1-7-30 Kuhonji, Chuo-ku, Kumamoto 862-0976, Japan
| | - Masanori Imai
- College of Pharmacy, Kinjo Gakuin University, 2-1723 Omori, Moriyamaku, Nagoya, Aichi 463-8521, Japan
| | - Hiromasa Kurosaki
- College of Pharmacy, Kinjo Gakuin University, 2-1723 Omori, Moriyamaku, Nagoya, Aichi 463-8521, Japan.
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Disturbance of the Conformation of DNA Hairpin Containing the 5′-GT-3′ Binding Site Caused by Zn(II)bleomycin-A5 Studied through NMR Spectroscopy. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5030052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The antibiotics known as bleomycins constitute a family of natural products clinically employed for the treatment of a wide spectrum of cancers. These antibiotics have the ability to chelate a metal center, most commonly Fe(II), and cause site-specific DNA cleavage upon oxidation. Bleomycin therapy is a successful course of treatment for some types of cancers. However, the risk of pulmonary fibrosis as an undesirable side effect, limits the use of the antibiotics in cancer chemotherapy. Bleomycins are differentiated by their C-terminal, or tail, regions, which have been shown to closely interact with DNA. Pulmonary toxicity has been correlated to the chemical structure of the bleomycin C-termini through biochemical studies performed in mice. In the present study, we examined the binding of Zn(II)Bleomycin-A5 to a DNA hairpin of sequence 5′-CCAGTATTTTTACTGG-3′, containing the 5′-GT-3′ binding site. The results were compared to those from a previous study that examined the binding of Zn(II)Bleomycin-A2 and Zn(II)Peplomycin to the same DNA hairpin. We provide evidence that, as shown for DNA hairpins containing the 5′-GC-3′ binding site, Zn(II)BLM-A5 causes the most significant structural changes to the oligonucleotide.
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Follett SE, Murray SA, Ingersoll AD, Reilly TM, Lehmann TE. Structural changes of Zn(II)bleomycin complexes when bound to DNA hairpins containing the 5'-GT-3' and 5'-GC-3' binding sites studied through NMR spectroscopy. MAGNETOCHEMISTRY 2018; 4. [PMID: 30464999 DOI: 10.3390/magnetochemistry4010004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Bleomycins are antitumor antibiotics that can chelate a metal center and cause site-specific DNA cleavage at 5'-Gpyrimidine-3' regions of DNA. These antibiotics are successful in the treatment of various cancers, but are known to cause pulmonary fibrosis to patients under bleomycin regimes. Substantial research has resulted in the development of over 300 bleomycin analogs, aiming to improve the therapeutic index of the drug. Previous studies have proposed that the lung toxicity caused by bleomycin is related to the C-terminal regions of these drugs, which have been shown to closely interact with DNA in metal-bleomycin-DNA complexes. Some of the research studying metallo-bleomycin-DNA interactions have suggested three different binding modes of the metal form of the drug to DNA, including total and/or partial intercalation, and minor groove binding. However, there is still lack of consensus regarding this matter, and solid conclusions on the subject have not yet been established. Previously we investigated the diverse levels of disruption caused to DNA hairpins containing 5'-GC-3' and 5'-GT-3' binding sites, which are consequence of the binding of bleomycins with different C-termini. The results of these investigation indicate that both the DNA-binding site and the bleomycin C-termini have an impact on the final conformations of drug and target. The present study focuses on the structural alterations exhibited by Zn(II)bleomycin-A2, -B2, -A5 and Zn(II)peplomycin upon binding to DNA hairpins containing 5'-GC-3' and 5'-GT-3' binding sites. Evidence that each Zn(II)bleomycin is structurally affected depending on both its C-terminus and the DNA-binding site present in the hairpin is provided.
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Affiliation(s)
- Shelby E Follett
- Department of Chemistry, University of Wyoming, Laramie, WY, United Sates of America
| | - Sally A Murray
- Department of Chemistry, University of Wyoming, Laramie, WY, United Sates of America
| | - Azure D Ingersoll
- Department of Chemistry, University of Wyoming, Laramie, WY, United Sates of America
| | - Teresa M Reilly
- Department of Chemical Engineering, University of Wyoming, Laramie, WY, United Sates of America
| | - Teresa E Lehmann
- Department of Chemistry, University of Wyoming, Laramie, WY, United Sates of America
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Follett SE, Ingersoll AD, Murray SA, Reilly TM, Lehmann TE. Interaction of Zn(II)bleomycin-A 2 and Zn(II)peplomycin with a DNA hairpin containing the 5'-GT-3' binding site in comparison with the 5'-GC-3' binding site studied by NMR spectroscopy. J Biol Inorg Chem 2017; 22:1039-1054. [PMID: 28748309 PMCID: PMC5985968 DOI: 10.1007/s00775-017-1482-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 07/13/2017] [Indexed: 11/29/2022]
Abstract
Bleomycins are a group of glycopeptide antibiotics synthesized by Streptomyces verticillus that are widely used for the treatment of various neoplastic diseases. These antibiotics have the ability to chelate a metal center, mainly Fe(II), and cause site-specific DNA cleavage. Bleomycins are differentiated by their C-terminal regions. Although this antibiotic family is a successful course of treatment for some types of cancers, it is known to cause pulmonary fibrosis. Previous studies have identified that bleomycin-related pulmonary toxicity is linked to the C-terminal region of these drugs. This region has been shown to closely interact with DNA. We examined the binding of Zn(II)peplomycin and Zn(II)bleomycin-A2 to a DNA hairpin of sequence 5'-CCAGTATTTTTACTGG-3', containing the binding site 5'-GT-3', and compared the results with those obtained from our studies of the same MBLMs bound to a DNA hairpin containing the binding site 5'-GC-3'. We provide evidence that the DNA base sequence has a strong impact in the final structure of the drug-target complex.
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Affiliation(s)
- Shelby E Follett
- Department of Chemistry, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA
| | - Azure D Ingersoll
- Department of Chemistry, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA
| | - Sally A Murray
- Department of Chemistry, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA
| | - Teresa M Reilly
- Department of Chemistry, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA
| | - Teresa E Lehmann
- Department of Chemistry, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA.
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