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Racané L, Rep V, Kraljević Pavelić S, Grbčić P, Zonjić I, Radić Stojković M, Taylor MC, Kelly JM, Raić-Malić S. Synthesis, antiproliferative and antitrypanosomal activities, and DNA binding of novel 6-amidino-2-arylbenzothiazoles. J Enzyme Inhib Med Chem 2021; 36:1952-1967. [PMID: 34455887 PMCID: PMC8409973 DOI: 10.1080/14756366.2021.1959572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
A series of 6-amidinobenzothiazoles, linked via phenoxymethylene or directly to the 1,2,3-triazole ring with a p-substituted phenyl or benzyl moiety, were synthesised and evaluated in vitro against four human tumour cell lines and the protozoan parasite Trypanosoma brucei. The influence of the type of amidino substituent and phenoxymethylene linker on antiproliferative and antitrypanosomal activities was observed, showing that the imidazoline moiety had a major impact on both activities. Benzothiazole imidazoline 14a, which was directly connected to N-1-phenyl-1,2,3-triazole, had the most potent growth-inhibitory effect (IC50 = 0.25 µM) on colorectal adenocarcinoma (SW620), while benzothiazole imidazoline 11b, containing a phenoxymethylene linker, exhibited the best antitrypanosomal potency (IC90 = 0.12 µM). DNA binding assays showed a non-covalent interaction of 6-amidinobenzothiazole ligands, indicating both minor groove binding and intercalation modes of DNA interaction. Our findings encourage further development of novel structurally related 6-amidino-2-arylbenzothiazoles to obtain more selective anticancer and anti-HAT agents.
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Affiliation(s)
- Livio Racané
- Faculty of Textile Technology, Department of Applied Chemistry, University of Zagreb, Zagreb, Croatia
| | - Valentina Rep
- Faculty of Chemical Engineering and Technology, Department of Organic Chemistry, University of Zagreb, Zagreb, Croatia
| | | | - Petra Grbčić
- Faculty of Health Studies, University of Rijeka, Rijeka, Croatia
| | - Iva Zonjić
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Zagreb, Croatia
| | | | - Martin C Taylor
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, UK
| | - John M Kelly
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, UK
| | - Silvana Raić-Malić
- Faculty of Chemical Engineering and Technology, Department of Organic Chemistry, University of Zagreb, Zagreb, Croatia
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Lončar B, Perin N, Mioč M, Boček I, Grgić L, Kralj M, Tomić S, Stojković MR, Hranjec M. Novel amino substituted tetracyclic imidazo[4,5-b]pyridine derivatives: Design, synthesis, antiproliferative activity and DNA/RNA binding study. Eur J Med Chem 2021; 217:113342. [PMID: 33751978 DOI: 10.1016/j.ejmech.2021.113342] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 02/06/2023]
Abstract
A novel series of tetracyclic imidazo[4,5-b]pyridine derivatives was designed and synthesized as potential antiproliferative agents. Their antiproliferative activity against human cancer cells was influenced by the introduction of chosen amino side chains on the different positions on the tetracyclic skeleton and particularly, by the position of N atom in the pyridine nuclei. Thus, the majority of compounds showed improved activity in comparison to standard drug etoposide. Several compounds showed pronounced cytostatic effect in the submicromolar range, especially on HCT116 and MCF-7 cancer cells. The obtained results have confirmed the significant impact of the position of N nitrogen in the pyridine ring on the enhancement of antiproliferative activity, especially for derivatives bearing amino side chains on position 2. Thus, regioisomers 6, 7 and 9 showed noticeable enhancement of activity in comparison to their counterparts 10, 11 and 13 with IC50 values in a nanomolar range of concentration (0.3-0.9 μM). Interactions with DNA (including G-quadruplex structure) and RNA were influenced by the position of amino side chains on the tetracyclic core of imidazo[4,5-b]pyridine derivatives and the ligand charge. Moderate to high binding affinities (logKs = 5-7) obtained for selected imidazo[4,5-b]pyridine derivatives suggest that DNA/RNA are potential cell targets.
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Affiliation(s)
- Borka Lončar
- Pliva d.o.o., odjel TAPI I&R, Unapređenje tehnoloških procesa i Podrška proizvodnji, Croatia
| | - Nataša Perin
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10000, Zagreb, Croatia
| | - Marija Mioč
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Ida Boček
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10000, Zagreb, Croatia
| | - Lea Grgić
- Ruđer Bošković Institute, Division of Organic Chemistry and Biochemistry, Bijenička cesta 54, 10 000, Zagreb, Croatia
| | - Marijeta Kralj
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Sanja Tomić
- Ruđer Bošković Institute, Division of Organic Chemistry and Biochemistry, Bijenička cesta 54, 10 000, Zagreb, Croatia
| | - Marijana Radić Stojković
- Ruđer Bošković Institute, Division of Organic Chemistry and Biochemistry, Bijenička cesta 54, 10 000, Zagreb, Croatia.
| | - Marijana Hranjec
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10000, Zagreb, Croatia.
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Design, synthesis, antitrypanosomal activity, DNA/RNA binding and in vitro ADME profiling of novel imidazoline-substituted 2-arylbenzimidazoles. Eur J Med Chem 2020; 207:112802. [PMID: 32927230 DOI: 10.1016/j.ejmech.2020.112802] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/28/2020] [Accepted: 08/29/2020] [Indexed: 01/10/2023]
Abstract
Novel imidazoline benzimidazole derivatives containing diversely substituted phenoxy moieties were synthesized with the aim of evaluating their antitrypanosomal activity, DNA/RNA binding affinity and in vitro ADME properties. The presence of the diethylaminoethyl subunit in 18a-18c led to enhanced antitrypanosomal potency, particularly for 18a and 18c, which contain unsubstituted and methoxy-substituted phenoxy moieties. They were found to be > 2-fold more potent against African trypanosomes than nifurtimox. Fluorescence and CD spectroscopy, thermal denaturation assays and computational analysis indicated a preference of 18a-18c toward AT-rich DNA and their minor groove binding mode. Replacement of the amidine group with less basic and ionisable nitrogen-containing moieties failed to improve membrane permeability of the investigated compounds. Due to structural diversification, the compounds displayed a range of physico-chemical features resulting in variable in vitro ADME properties, leaving space for further optimization of the biological profiles.
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Teofilović NK, Bihi M, Stojković MR, Tumir LM, Ester K, Kralj M, Majhen D, Oršolić N, Lepur A, Vrbanec D, Markotić A, Dembić Z, Weber ANR, Piantanida I, Vugrek O, Diken M, Knežević J. 1-ethyl-3-(6-methylphenanthridine-8-il) urea modulates TLR3/9 activation and induces selective pro-inflammatory cytokine expression in vitro. Bioorg Med Chem Lett 2017; 27:1530-1537. [PMID: 28254484 DOI: 10.1016/j.bmcl.2017.02.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 02/16/2017] [Accepted: 02/17/2017] [Indexed: 01/07/2023]
Abstract
We have previously demonstrated the nucleic acid binding capacity of phenanthridine derivatives (PHTs). Because nucleic acids are potent inducers of innate immune response through Toll-like receptors (TLRs), and because PTHs bear a structural resemblance to commonly used synthetic ligands for TLR7/8, we hypothesized that PHTs could modulate/activate immune response. We found that compound M199 induces secretion of IL-6, IL-8 and TNFα in human PBMCs and inhibits TLR3/9 activation in different cellular systems (PBMCs, HEK293 and THP-1 cell lines).
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Damir Vrbanec
- Department of Medical Oncology, University Hospital Center Zagreb, Croatia
| | - Alemka Markotić
- University Hospital for Infectious Diseases "Dr. Fran Mihaljevic", Zagreb, Croatia
| | - Zlatko Dembić
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Norway
| | | | | | | | - Mustafa Diken
- TRON-Translational Oncology at the University Medical Center of Johannes Gutenberg University GmbH, Mainz, Germany
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Tumir LM, Šupljika F, Piantanida I. Bis-phenanthridinium–adenine conjugates as fluorescent and CD reporters for fine structural differences in ds-DNA/RNA and ss-RNA structures. Supramol Chem 2015. [DOI: 10.1080/10610278.2015.1099655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lidija-Marija Tumir
- Laboratory for Study of Interactions of Biomacromolecules, Division of Organic Chemistry & Biochemistry, Ruđer Bošković Institute, Zagreb, Croatia
| | - Filip Šupljika
- Laboratory for Study of Interactions of Biomacromolecules, Division of Organic Chemistry & Biochemistry, Ruđer Bošković Institute, Zagreb, Croatia
| | - Ivo Piantanida
- Laboratory for Study of Interactions of Biomacromolecules, Division of Organic Chemistry & Biochemistry, Ruđer Bošković Institute, Zagreb, Croatia
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Blažek Bregović V, Basarić N, Mlinarić-Majerski K. Anion binding with urea and thiourea derivatives. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.011] [Citation(s) in RCA: 214] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Tumir LM, Radić Stojković M, Piantanida I. Come-back of phenanthridine and phenanthridinium derivatives in the 21st century. Beilstein J Org Chem 2014; 10:2930-54. [PMID: 25550761 PMCID: PMC4273281 DOI: 10.3762/bjoc.10.312] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 11/21/2014] [Indexed: 12/23/2022] Open
Abstract
Phenanthridine derivatives are one of the most intensively studied families of biologically active compounds with efficient DNA binding capability. Attracting attention since DNA structure discovery (1960s), they were early recognized as a symbol of DNA intercalative binding, for many decades applied as gold-standard DNA- and RNA-fluorescent markers (ethidium bromide), probes for cell viability (propidium iodide), but also “ill-famed” for various toxic (genotoxic) and mutagenic effects. After two decades of low interest, the discovery of phenanthridine alkaloids and new studies of antiparasitic/antitumor properties of phenanthridine derivatives resulted in the strong increase of the scientific interest about the turn of this century. Here are summarized phenanthridine-related advances in the 21st century (2000-present period) with emphasis on the supramolecular interactions and bioorganic chemistry, as well as novel or improved synthetic approaches.
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Affiliation(s)
- Lidija-Marija Tumir
- Laboratory for Study of Interactions of Biomacromolecules, Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, PO Box 180, HR-10002 Zagreb, Croatia
| | - Marijana Radić Stojković
- Laboratory for Study of Interactions of Biomacromolecules, Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, PO Box 180, HR-10002 Zagreb, Croatia
| | - Ivo Piantanida
- Laboratory for Study of Interactions of Biomacromolecules, Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, PO Box 180, HR-10002 Zagreb, Croatia
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Benner K, Bergen A, Ihmels H, Pithan PM. Selective Stabilization of Abasic Site-Containing DNA by Insertion of Sterically Demanding Biaryl Ligands. Chemistry 2014; 20:9883-7. [DOI: 10.1002/chem.201403622] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Indexed: 01/17/2023]
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González-García J, Uzelac L, Kralj M, Llinares JM, García-España E, Piantanida I. The size of the aryl linker between two polyaza-cyclophane moieties controls the binding selectivity to ds-RNA vs. ds-DNA. Org Biomol Chem 2013; 11:2154-61. [PMID: 23392228 DOI: 10.1039/c3ob00032j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Aryl-linked (pyridine- vs. phenanthroline-) bis-polyaza pyridinophane scorpiands PYPOD and PHENPOD strongly bind to the double stranded DNA and RNA, whereby very intriguing RNA over DNA selectivity is finely tuned by aryl-linker length and aromatic surface. Moreover, PYPOD and PHENPOD dimer formation at high compound/polynucleotide ratios is highly sensitive to the fine interplay between the steric and binding properties of compound-dimers and the DNA minor groove/RNA major groove. That is demonstrated by significantly different induced CD spectra, which allow spectroscopic differentiation between various DNA/RNA secondary structures. A significantly higher (micromolar) antiproliferative effect of PYPOD and PHENPOD on human cell lines with respect to previously reported pyridine-based tripodal aliphatic polyamines is attributed to masked positive charges and increased hydrophobicity of novel compounds, resulting in more efficient membrane permeation and cellular uptake.
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Affiliation(s)
- Jorge González-García
- ICMOL, Departamento de Química Inorgánica, Facultad de Química, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
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Radić Stojković M, Miljanić S, Mišković K, Glavaš-Obrovac L, Piantanida I. The phenanthridine biguanides efficiently differentiate between dGdC, dAdT and rArU sequences by two independent, sensitive spectroscopic methods. MOLECULAR BIOSYSTEMS 2011; 7:1753-65. [DOI: 10.1039/c1mb05030c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Gröger K, Baretić D, Piantanida I, Marjanović M, Kralj M, Grabar M, Tomić S, Schmuck C. Guanidiniocarbonyl-pyrrole-aryl conjugates as nucleic acid sensors: switch of binding mode and spectroscopic responses by introducing additional binding sites into the linker. Org Biomol Chem 2010; 9:198-209. [PMID: 21076779 DOI: 10.1039/c0ob00103a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel guanidiniocarbonyl pyrrole-pyrene conjugates 3 and 4 as spectroscopic probes for ds-polynucleotides were synthesized and their interaction with different ds-DNAs/RNAs studied. Compared to a previously reported first set of conjugates (1 and 2) the significant extension and increased rigidity of the central part of the structure resulted in a switch of DNA binding mode from intercalative (previously studied derivatives 1 and 2 with a nonbinding and flexible linker) to minor groove binding of the two novel guanidiniocarbonyl-pyrrole-pyrene conjugates 3 and 4. These two compounds interact strongly with ds-DNAs, but only weakly with ds-RNA. The newly incorporated heterocyclic moieties within the central part of the structure of 3 and 4 were able to control by steric and hydrogen-bonding effects the alignment of the molecules within various, structurally different forms of DNA minor grooves, whereby even small differences in the position of the attached pyrene within the groove were reflected in different fluorimetric responses. In addition, 3 and 4 revealed intriguing in vitro selectivity among various human tumour cell lines.
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Affiliation(s)
- Kathrin Gröger
- Institute for Organic Chemistry, University of Duisburg-Essen, Universitässtrasse 7, 45141, Essen, Germany
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Liu Q, Zhang J, Wang MQ, Zhang DW, Lu QS, Huang Y, Lin HH, Yu XQ. Synthesis, DNA binding and cleavage activity of macrocyclic polyamines bearing mono- or bis-acridine moieties. Eur J Med Chem 2010; 45:5302-8. [DOI: 10.1016/j.ejmech.2010.08.051] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 08/06/2010] [Accepted: 08/24/2010] [Indexed: 10/19/2022]
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Dukši M, Baretić D, Čaplar V, Piantanida I. Novel bis-phenanthridine derivatives with easily tunable linkers, study of their interactions with DNA and screening of antiproliferative activity. Eur J Med Chem 2010; 45:2671-6. [DOI: 10.1016/j.ejmech.2010.02.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Revised: 12/28/2009] [Accepted: 02/04/2010] [Indexed: 10/19/2022]
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Li J, Zhang J, Lu QS, Yue Y, Huang Y, Zhang DW, Lin HH, Chen SY, Yu XQ. Hydrolytic cleavage of DNA by urea-bridged macrocyclic polyamines. Eur J Med Chem 2009; 44:5090-3. [DOI: 10.1016/j.ejmech.2009.06.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Revised: 06/22/2009] [Accepted: 06/29/2009] [Indexed: 10/20/2022]
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