1
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Orsi M, Shing Loh B, Weng C, Ang WH, Frei A. Using Machine Learning to Predict the Antibacterial Activity of Ruthenium Complexes. Angew Chem Int Ed Engl 2024; 63:e202317901. [PMID: 38088924 DOI: 10.1002/anie.202317901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Indexed: 01/26/2024]
Abstract
Rising antimicrobial resistance (AMR) and lack of innovation in the antibiotic pipeline necessitate novel approaches to discovering new drugs. Metal complexes have proven to be promising antimicrobial compounds, but the number of studied compounds is still low compared to the millions of organic molecules investigated so far. Lately, machine learning (ML) has emerged as a valuable tool for guiding the design of small organic molecules, potentially even in low-data scenarios. For the first time, we extend the application of ML to the discovery of metal-based medicines. Utilising 288 modularly synthesized ruthenium arene Schiff-base complexes and their antibacterial properties, a series of ML models were trained. The models perform well and are used to predict the activity of 54 new compounds. These displayed a 5.7x higher hit-rate (53.7 %) against methicillin-resistant Staphylococcus aureus (MRSA) compared to the original library (9.4 %), demonstrating that ML can be applied to improve the success-rates in the search of new metalloantibiotics. This work paves the way for more ambitious applications of ML in the field of metal-based drug discovery.
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Affiliation(s)
- Markus Orsi
- Department of Chemistry, Biochemistry & Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Boon Shing Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Cheng Weng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
- NUS Graduate School - Integrated Science and Engineering Programme (ISEP), National University of Singapore, 21 Lower Kent Ridge Rd, Singapore, 119077, Singapore
| | - Angelo Frei
- Department of Chemistry, Biochemistry & Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
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2
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Weng C, Tan YLK, Koh WG, Ang WH. Harnessing Transition Metal Scaffolds for Targeted Antibacterial Therapy. Angew Chem Int Ed Engl 2023; 62:e202310040. [PMID: 37621226 DOI: 10.1002/anie.202310040] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/24/2023] [Accepted: 08/24/2023] [Indexed: 08/26/2023]
Abstract
Antimicrobial resistance, caused by persistent adaptation and growing resistance of pathogenic bacteria to overprescribed antibiotics, poses one of the most serious and urgent threats to global public health. The limited pipeline of experimental antibiotics in development further exacerbates this looming crisis and new drugs with alternative modes of action are needed to tackle evolving pathogenic adaptation. Transition metal complexes can replenish this diminishing stockpile of drug candidates by providing compounds with unique properties that are not easily accessible using pure organic scaffolds. We spotlight four emerging strategies to harness these unique properties to develop new targeted antibacterial agents.
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Affiliation(s)
- Cheng Weng
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Singapore
| | | | - Wayne Gareth Koh
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Singapore
- NUS Graduate School of Integrative Sciences and Engineering, 28 Medical Drive, Singapore, 117456, Singapore
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3
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Chow MJ, Licona C, Pastorin G, Mellitzer G, Ang WH, Gaiddon C. Correction: Structural tuning of organoruthenium compounds allows oxidative switch to control ER stress pathways and bypass multidrug resistance. Chem Sci 2023; 14:9608-9609. [PMID: 37712049 PMCID: PMC10498674 DOI: 10.1039/d3sc90157b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 08/11/2023] [Indexed: 09/16/2023] Open
Abstract
[This corrects the article DOI: 10.1039/C6SC00268D.].
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Affiliation(s)
- Mun Juinn Chow
- Department of Chemistry, National University of Singapore 3 Science Drive 3 117543 Singapore +65 6516 5131
- NUS Graduate School for Integrative Sciences and Engineering Singapore
| | - Cynthia Licona
- U1113 INSERM 3 Avenue Molière Strasbourg 67200 France +33 68 52 53 56
- Section Oncology, FMTS, Strasbourg University Strasbourg France
| | - Giorgia Pastorin
- NUS Graduate School for Integrative Sciences and Engineering Singapore
- Department of Pharmacy, National University of Singapore 18 Science Drive 4 117543 Singapore
| | - Georg Mellitzer
- U1113 INSERM 3 Avenue Molière Strasbourg 67200 France +33 68 52 53 56
- Section Oncology, FMTS, Strasbourg University Strasbourg France
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore 3 Science Drive 3 117543 Singapore +65 6516 5131
- NUS Graduate School for Integrative Sciences and Engineering Singapore
| | - Christian Gaiddon
- U1113 INSERM 3 Avenue Molière Strasbourg 67200 France +33 68 52 53 56
- Section Oncology, FMTS, Strasbourg University Strasbourg France
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4
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Weng C, Yang H, Loh BS, Wong MW, Ang WH. Targeting Pathogenic Formate-Dependent Bacteria with a Bioinspired Metallo-Nitroreductase Complex. J Am Chem Soc 2023; 145:6453-6461. [PMID: 36881731 DOI: 10.1021/jacs.3c00237] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
Nitroreductases (NTRs) constitute an important class of oxidoreductase enzymes that have evolved to metabolize nitro-containing compounds. Their unique characteristics have spurred an array of potential uses in medicinal chemistry, chemical biology, and bioengineering toward harnessing nitro caging groups and constructing NTR variants for niche applications. Inspired by how they carry out enzymatic reduction via a cascade of hydride transfer reactions, we sought to develop a synthetic small-molecule NTR system based on transfer hydrogenation mediated by transition metal complexes harnessing native cofactors. We report the first water-stable Ru-arene complex capable of selectively and fully reducing nitroaromatics into anilines in a biocompatible buffered aqueous environment using formate as the hydride source. We further demonstrated its application to activate nitro-caged sulfanilamide prodrug in formate-abundant bacteria, specifically pathogenic methicillin-resistant Staphylococcus aureus. This proof of concept paves the way for a new targeted antibacterial chemotherapeutic approach leveraging on redox-active metal complexes for prodrug activation via bioinspired nitroreduction.
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Affiliation(s)
- Cheng Weng
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117543, Singapore
| | - Hui Yang
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117543, Singapore
| | - Boon Shing Loh
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117543, Singapore
| | - Ming Wah Wong
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117543, Singapore
- NUS Graduate School─Integrative Sciences and Engineering Programme, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117543, Singapore
- NUS Graduate School─Integrative Sciences and Engineering Programme, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077, Singapore
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5
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Chang MR, Rusanov DA, Arakelyan J, Alshehri M, Asaturova AV, Kireeva GS, Babak MV, Ang WH. Targeting emerging cancer hallmarks by transition metal complexes: Cancer stem cells and tumor microbiome. Part I. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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6
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Lim SY, Low ZE, Tan RPW, Lim ZC, Ang WH, Kubota T, Yamanaka M, Pang S, Simsek E, Li SFY. Single-cell and bulk ICP-MS investigation of accumulation patterns of Pt-based metallodrugs in cisplatin-sensitive and -resistant cell models. Metallomics 2022; 14:6769858. [PMID: 36271844 DOI: 10.1093/mtomcs/mfac085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/15/2022] [Indexed: 12/14/2022]
Abstract
In research enabling preclinical development and attaining a deeper understanding of the behavior of metallodrugs in cancer cells with acquired resistance, intracellular Pt accumulation could be considered an important biomarker and analytical focus. In this work, Pt accumulation patterns in terms of the number of cells and Pt mass in single cells were precisely defined by using inductively coupled plasma-mass spectrometry (ICP-MS) operating in a fast time-resolved analysis mode. This technique is otherwise known as single-cell (SC)-ICP-MS. By applying the nascent and validated SC-ICP-MS technique, comparisons across three Pt drugs (cisplatin, carboplatin, and oxaliplatin) in the A2780 and A2780cis ovarian cancer cell models could be made. Additional roles of transporters on top of passive diffusion and the drugs' bioactivity could be postulated. The SC-ICP-MS-based observations also served as a cross-validation point to augment preexisting research findings on Pt-resistance mechanisms. Conjectures regarding S and Fe metabolism were also derived based on an additional and direct ICP-MS analysis of endogenous elements. Overall, our work not only confirms the utility of SC-ICP-MS in chemotherapeutic research, but also provided insights into further ICP-MS-based analytical capacities to be developed.
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Affiliation(s)
- Si Ying Lim
- NUS Graduate School's Integrative Sciences & Engineering Programme (ISEP), National University of Singapore, University Hall, Tan Chin Tuan Wing, Singapore 119077, Singapore
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Zhi En Low
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Regina Pei Woon Tan
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Zhi Chiaw Lim
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Wee Han Ang
- NUS Graduate School's Integrative Sciences & Engineering Programme (ISEP), National University of Singapore, University Hall, Tan Chin Tuan Wing, Singapore 119077, Singapore
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Tetsuo Kubota
- Agilent Technologies Japan Ltd., 9-1 Takakura-machi, Hachioji-shi, Tokyo 192-8510, Japan
| | - Michiko Yamanaka
- Agilent Technologies Japan Ltd., 9-1 Takakura-machi, Hachioji-shi, Tokyo 192-8510, Japan
| | - Steven Pang
- Agilent Technologies Singapore Pte. Ltd., Singapore768923, Singapore
| | - Erhan Simsek
- Agilent Technologies Singapore Pte. Ltd., Singapore768923, Singapore
| | - Sam Fong Yau Li
- NUS Graduate School's Integrative Sciences & Engineering Programme (ISEP), National University of Singapore, University Hall, Tan Chin Tuan Wing, Singapore 119077, Singapore
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
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7
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Kuznetcova I, Bacher F, Alfadul SM, Tham MJR, Ang WH, Babak MV, Rapta P, Arion VB. Elucidation of Structure-Activity Relationships in Indolobenzazepine-Derived Ligands and Their Copper(II) Complexes: the Role of Key Structural Components and Insight into the Mechanism of Action. Inorg Chem 2022; 61:10167-10181. [PMID: 35713376 PMCID: PMC9490829 DOI: 10.1021/acs.inorgchem.2c01375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Indolo[3,2-d][1]benzazepines (paullones), indolo[3,2-d][2]benzazepines, and indolo[2,3-d][2]benzazepines (latonduines) are isomeric scaffolds of current medicinal interest. Herein, we prepared a small library of novel indolo[3,2-d][2]benzazepine-derived ligands HL1-HL4 and copper(II) complexes 1-4. All compounds were characterized by spectroscopic methods (1H and 13C NMR, UV-vis, IR) and electrospray ionization (ESI) mass spectrometry, while complexes 2 and 3, in addition, by X-ray crystallography. Their purity was confirmed by HPLC coupled with high-resolution ESI mass spectrometry and/or elemental analysis. The stability of compounds in aqueous solutions in the presence of DMSO was confirmed by 1H NMR and UV-vis spectroscopy measurements. The compounds revealed high antiproliferative activity in vitro in the breast cancer cell line MDA-MB-231 and hepatocellular carcinoma cell line LM3 in the low micromolar to nanomolar concentration range. Important structure-activity relationships were deduced from the comparison of anticancer activities of HL1-HL4 and 1-4 with those of structurally similar paullone-derived (HL5-HL7 and 5-7) and latonduine-derived scaffolds (HL8-HL11 and 8-11). The high anticancer activity of the lead drug candidate 4 was linked to reactive oxygen species and endoplasmic reticulum stress induction, which were confirmed by fluorescent microscopy and Western blot analysis.
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Affiliation(s)
- Irina Kuznetcova
- Institute of Inorganic Chemistry of the University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
| | - Felix Bacher
- Institute of Inorganic Chemistry of the University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
| | - Samah Mutasim Alfadul
- Drug Discovery Lab, Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Max Jing Rui Tham
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Maria V Babak
- Drug Discovery Lab, Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Peter Rapta
- Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Vladimir B Arion
- Institute of Inorganic Chemistry of the University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
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8
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Weng C, Shen L, Teo JW, Lim ZC, Loh BS, Ang WH. Targeted Antibacterial Strategy Based on Reactive Oxygen Species Generated from Dioxygen Reduction Using an Organoruthenium Complex. JACS Au 2021; 1:1348-1354. [PMID: 34604844 PMCID: PMC8479771 DOI: 10.1021/jacsau.1c00262] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Indexed: 06/13/2023]
Abstract
Pathogenic microorganisms pose a serious threat to global public health due to their persistent adaptation and growing resistance to antibiotics. Alternative therapeutic strategies are required to address this growing threat. Bactericidal antibiotics that are routinely prescribed to treat infections rely on hydroxyl radical formation for their therapeutic efficacies. We developed a redox approach to target bacteria using organotransition metal complexes to mediate the reduction of cellular O2 to H2O2, as a precursor for hydroxyl radicals via Fenton reaction. We prepared a library of 480 unique organoruthenium Schiff-base complexes using a coordination-driven three-component assembly strategy and identified the lead organoruthenium complex Ru1 capable of selectively invoking oxidative stress in Gram-positive bacteria, in particular methicillin-resistant Staphylococcus aureus, via transfer hydrogenation reaction and/or single electron transfer on O2. This strategy paves the way for a targeted antimicrobial approach leveraging on the redox chemistry of organotransition metal complexes to combat drug resistance.
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Affiliation(s)
- Cheng Weng
- Department
of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Linghui Shen
- Department
of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Jin Wei Teo
- Department
of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Zhi Chiaw Lim
- Department
of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Boon Shing Loh
- Department
of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
| | - Wee Han Ang
- Department
of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
- NUS
Graduate School - Integrative Sciences and Engineering Programme, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077, Singapore
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9
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Babak MV, Chong KR, Rapta P, Zannikou M, Tang HM, Reichert L, Chang MR, Kushnarev V, Heffeter P, Meier‐Menches SM, Lim ZC, Yap JY, Casini A, Balyasnikova IV, Ang WH. Interfering with Metabolic Profile of Triple‐Negative Breast Cancers Using Rationally Designed Metformin Prodrugs. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Maria V. Babak
- Drug Discovery Lab Department of Chemistry City University of Hong Kong 83 Tat Chee Avenue 999077 Hong Kong SAR P. R. China
| | - Kai Ren Chong
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
| | - Peter Rapta
- Institute of Physical Chemistry and Chemistry Physics Slovak Technical University of Technology Radlinského 9 82137 Bratislava Slovak Republic
| | - Markella Zannikou
- Department of Neurological Surgery The Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
| | - Hui Min Tang
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
| | - Lisa Reichert
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
| | - Meng Rui Chang
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
| | - Vladimir Kushnarev
- FSBI “National Medical Research Center of Oncology, named after N.N Petrov” Ministry of Healthcare of the Russian Federation 68 Leningradskaya Street, Pesochny 197758 St Petersburg Russian Federation
| | - Petra Heffeter
- Institute of Cancer Research and Comprehensive Cancer Center Department of Medicine I Medical University of Vienna Borschkegasse 8a 1090 Vienna Austria
| | | | - Zhi Chiaw Lim
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
| | - Jian Yu Yap
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
| | - Angela Casini
- Department of Chemistry Technical University of Munich Lichtenbergstr. 4 85748 Garching, München Germany
| | - Irina V. Balyasnikova
- Department of Neurological Surgery The Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
| | - Wee Han Ang
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
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10
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Babak MV, Chong KR, Rapta P, Zannikou M, Tang HM, Reichert L, Chang MR, Kushnarev V, Heffeter P, Meier-Menches SM, Lim ZC, Yap JY, Casini A, Balyasnikova IV, Ang WH. Interfering with Metabolic Profile of Triple-Negative Breast Cancers Using Rationally Designed Metformin Prodrugs. Angew Chem Int Ed Engl 2021; 60:13405-13413. [PMID: 33755286 DOI: 10.1002/anie.202102266] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Indexed: 12/19/2022]
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive subtype of breast cancer, characterized by an aberrant metabolic phenotype with high metastatic capacity, resulting in poor patient prognoses and low survival rates. We designed a series of novel AuIII cyclometalated prodrugs of energy-disrupting Type II antidiabetic drugs namely, metformin and phenformin. Prodrug activation and release of the metformin ligand was achieved by tuning the cyclometalated AuIII fragment. The lead complex 3met was 6000-fold more cytotoxic compared to uncoordinated metformin and significantly reduced tumor burden in mice with aggressive breast cancers with lymphocytic infiltration into tumor tissues. These effects was ascribed to 3met interfering with energy production in TNBCs and inhibiting associated pro-survival responses to induce deadly metabolic catastrophe.
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Affiliation(s)
- Maria V Babak
- Drug Discovery Lab, Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, 999077, Hong Kong SAR, P. R. China
| | - Kai Ren Chong
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Peter Rapta
- Institute of Physical Chemistry and Chemistry Physics, Slovak Technical University of Technology, Radlinského 9, 82137, Bratislava, Slovak Republic
| | - Markella Zannikou
- Department of Neurological Surgery, The Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Hui Min Tang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Lisa Reichert
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Meng Rui Chang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Vladimir Kushnarev
- FSBI "National Medical Research Center of Oncology, named after N.N Petrov", Ministry of Healthcare of the Russian Federation, 68 Leningradskaya Street, Pesochny, 197758, St Petersburg, Russian Federation
| | - Petra Heffeter
- Institute of Cancer Research and Comprehensive Cancer Center, Department of Medicine I, Medical University of Vienna, Borschkegasse 8a, 1090, Vienna, Austria
| | - Samuel M Meier-Menches
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Zhi Chiaw Lim
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Jian Yu Yap
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Angela Casini
- Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748, Garching, München, Germany
| | - Irina V Balyasnikova
- Department of Neurological Surgery, The Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
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11
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Ong JX, Le HV, Lee VEY, Ang WH. A Cisplatin‐Selective Fluorescent Probe for Real‐Time Monitoring of Mitochondrial Platinum Accumulation in Living Cells. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Hai Van Le
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Violet Eng Yee Lee
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
| | - Wee Han Ang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
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12
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Ong JX, Le HV, Lee VEY, Ang WH. Frontispiece: A Cisplatin‐Selective Fluorescent Probe for Real‐Time Monitoring of Mitochondrial Platinum Accumulation in Living Cells. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/anie.202181761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Hai Van Le
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Violet Eng Yee Lee
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
| | - Wee Han Ang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
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13
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Ong JX, Le HV, Lee VEY, Ang WH. Frontispiz: A Cisplatin‐Selective Fluorescent Probe for Real‐Time Monitoring of Mitochondrial Platinum Accumulation in Living Cells. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202181761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Hai Van Le
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Violet Eng Yee Lee
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
| | - Wee Han Ang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
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14
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Ong JX, Le HV, Lee VEY, Ang WH. A Cisplatin‐Selective Fluorescent Probe for Real‐Time Monitoring of Mitochondrial Platinum Accumulation in Living Cells. Angew Chem Int Ed Engl 2021; 60:9264-9269. [DOI: 10.1002/anie.202010951] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/29/2020] [Indexed: 01/17/2023]
Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Hai Van Le
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Violet Eng Yee Lee
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
| | - Wee Han Ang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering Institution National University of Singapore 28 Medical Drive Singapore 117456 Singapore
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15
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Le HV, Babak MV, Ehsan MA, Altaf M, Reichert L, Gushchin AL, Ang WH, Isab AA. Highly cytotoxic gold(i)-phosphane dithiocarbamate complexes trigger an ER stress-dependent immune response in ovarian cancer cells. Dalton Trans 2021; 49:7355-7363. [PMID: 32432621 DOI: 10.1039/d0dt01411g] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Ovarian cancer is a highly aggressive disease which is treated by surgery and platinum chemotherapy. However, a significant proportion of treated patients develop resistance to platinum treatment resulting in tumor relapse. Acquired platinum resistance has been recently correlated with activation of pro-survival endoplasmic reticulum (ER) stress responses. We hypothesized that Au complexes that induce severe ER stress might counteract pro-survival cellular attempts leading to the ER stress-mediated apoptosis and reduced platinum resistance. In this work, we prepared a series of highly cytotoxic AuI-dialkyldithiocarbamate complexes and investigated their anticancer potential in ovarian cancer cells. Complexes demonstrated surprisingly low stability in chloroform, resulting in the formation of an Au chain polymer, which also displayed excellent cytotoxicity. Lead complex 2 induced oxidative stress and ER stress-mediated p53-independent apoptosis associated with PARP cleavage and cell cycle arrest at G2/M phase. Importantly, 2 caused the surface exposure of calreticulin (CRT), which is the first step in the activation of cellular immunogenic response.
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Affiliation(s)
- Hai Van Le
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
| | - Maria V Babak
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
| | - Muhammad Ali Ehsan
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Muhammad Altaf
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia and Department of Chemistry, Government College University Lahore, 54000 Lahore, Pakistan
| | - Lisa Reichert
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
| | - Artem L Gushchin
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia and Novosibirsk State University, 2 Pirogov Street, 630090 Novosibirsk, Russia
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore. and NUS Graduate School for Integrative Sciences and Engineering, Singapore
| | - Anvarhusein A Isab
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
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16
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Lee VEY, Lim ZC, Chew SL, Ang WH. Strategy for Traceless Codrug Delivery with Platinum(IV) Prodrug Complexes Using Self-Immolative Linkers. Inorg Chem 2021; 60:1823-1831. [DOI: 10.1021/acs.inorgchem.0c03299] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Violet Eng Yee Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore
| | - Zhi Chiaw Lim
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Suet Li Chew
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore
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17
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Kim G, Tan HL, Sundar R, Lieske B, Chee CE, Ho J, Shabbir A, Babak MV, Ang WH, Goh BC, Yong WP, Wang L, So JBY. PIPAC-OX: A Phase I Study of Oxaliplatin-Based Pressurized Intraperitoneal Aerosol Chemotherapy in Patients with Peritoneal Metastases. Clin Cancer Res 2020; 27:1875-1881. [PMID: 33148667 DOI: 10.1158/1078-0432.ccr-20-2152] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/31/2020] [Accepted: 10/29/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE Pressurized intraperitoneal aerosol chemotherapy (PIPAC) is a novel laparoscopic, intraperitoneal chemotherapy delivery technique aiming to improve drug distribution and tissue penetration to treat peritoneal metastases. Thus far, PIPAC oxaliplatin is conducted at an arbitrary dose of 92 mg/m2. We conducted a phase I study to establish safety and tolerability. PATIENTS AND METHODS We used a 3+3 dose-escalation design of PIPAC oxaliplatin for patients with peritoneal metastases from gastrointestinal tumors, after failure of at least first-line chemotherapy. Dose levels were planned at 45, 60, 90, and 120 mg/m2. RESULTS This study included 16 patients with 24 PIPAC procedures (8 gastric; 5 colorectal; and 1 gallbladder, pancreas, and appendix cancer each). Median age and peritoneal cancer index (PCI) score were 62 years and 17, respectively. Two patients developed pancreatitis (grade 2 and 3) at 45 mg/m2, necessitating cohort expansion. Another patient developed grade 2 pancreatitis at 90 mg/m2. There were no other dose-limiting toxicities, and the highest-dose cohort (120 mg/m2) tolerated PIPAC well. Pharmacokinetic analyses demonstrated good linearity between dose and maximum concentration (r 2 = 0.95) and AUC (r 2 = 0.99). On the basis of RECIST, 62.5% and 50% had stable disease after one and two PIPAC procedures, respectively. A total of 8 patients underwent two PIPAC procedures, with improvement of median PCI and peritoneal regression grade score from 15 to 12 and 2.5 to 2.0, respectively. CONCLUSIONS The recommended phase II dose is 120 mg/m2. Future studies should further delineate the efficacy and role of PIPAC oxaliplatin for peritoneal metastases.See related commentary by de Jong et al., p. 1830.
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Affiliation(s)
- Guowei Kim
- University Surgical Cluster, National University Health System, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Surgical Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
| | - Hon Lyn Tan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Haematology-Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
| | - Raghav Sundar
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Haematology-Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore.,The N.1 Institute for Health, National University of Singapore, Singapore
| | - Bettina Lieske
- University Surgical Cluster, National University Health System, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Surgical Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
| | - Cheng Ean Chee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Haematology-Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
| | - Jingshan Ho
- Department of Haematology-Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
| | - Asim Shabbir
- University Surgical Cluster, National University Health System, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Surgical Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
| | - Maria V Babak
- Department of Chemistry, National University of Singapore, Singapore.,Department of Chemistry, City University of Hong Kong, P.R. China
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - Boon Cher Goh
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Haematology-Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore.,Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Wei Peng Yong
- Department of Haematology-Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore. .,Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Lingzhi Wang
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Jimmy B Y So
- University Surgical Cluster, National University Health System, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Surgical Oncology, National University Cancer Institute, Singapore (NCIS), National University Health System, Singapore
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18
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Affiliation(s)
- Boon Shing Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
- NUS
Graduate School of Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore 117456
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19
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Tham MJR, Babak MV, Ang WH. Frontispiz: PlatinER: A Highly Potent Anticancer Platinum(II) Complex that Induces Endoplasmic Reticulum Stress Driven Immunogenic Cell Death. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202084362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Max Jing Rui Tham
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
| | - Maria V. Babak
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
- Department of Chemistry City University of Hong Kong 83 Tat Chee Avenue 999077 Hong Kong SAR P. R. China
| | - Wee Han Ang
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
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20
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Tham MJR, Babak MV, Ang WH. Frontispiece: PlatinER: A Highly Potent Anticancer Platinum(II) Complex that Induces Endoplasmic Reticulum Stress Driven Immunogenic Cell Death. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/anie.202084362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Max Jing Rui Tham
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
| | - Maria V. Babak
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
- Department of Chemistry City University of Hong Kong 83 Tat Chee Avenue 999077 Hong Kong SAR P. R. China
| | - Wee Han Ang
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
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21
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Ohui K, Stepanenko I, Besleaga I, Babak MV, Stafi R, Darvasiova D, Giester G, Pósa V, Enyedy EA, Vegh D, Rapta P, Ang WH, Popović-Bijelić A, Arion VB. Triapine Derivatives Act as Copper Delivery Vehicles to Induce Deadly Metal Overload in Cancer Cells. Biomolecules 2020; 10:biom10091336. [PMID: 32961653 PMCID: PMC7564244 DOI: 10.3390/biom10091336] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/12/2020] [Accepted: 09/15/2020] [Indexed: 12/11/2022] Open
Abstract
Thiosemicarbazones continue to attract the interest of researchers as potential anticancer drugs. For example, 3-aminopyridine-2-carboxaldehyde thiosemicarbazone, or triapine, is the most well-known representative of this class of compounds that has entered multiple phase I and II clinical trials. Two new triapine derivatives HL1 and HL2 were prepared by condensation reactions of 2-pyridinamidrazone and S-methylisothiosemicarbazidium chloride with 3-N-(tert-butyloxycarbonyl) amino-pyridine-2-carboxaldehyde, followed by a Boc-deprotection procedure. Subsequent reaction of HL1 and HL2 with CuCl2·2H2O in 1:1 molar ratio in methanol produced the complexes [CuII(HL1)Cl2]·H2O (1·H2O) and [CuII(HL2)Cl2] (2). The reaction of HL2 with Fe(NO3)3∙9H2O in 2:1 molar ratio in the presence of triethylamine afforded the complex [FeIII(L2)2]NO3∙0.75H2O (3∙0.75H2O), in which the isothiosemicarbazone acts as a tridentate monoanionic ligand. The crystal structures of HL1, HL2 and metal complexes 1 and 2 were determined by single crystal X-ray diffraction. The UV-Vis and EPR spectroelectrochemical measurements revealed that complexes 1 and 2 underwent irreversible reduction of Cu(II) with subsequent ligand release, while 3 showed an almost reversible electrochemical reduction in dimethyl sulfoxide (DMSO). Aqueous solution behaviour of HL1 and 1, as well as of HL2 and its complex 2, was monitored as well. Complexes 1−3 were tested against ovarian carcinoma cells, as well as noncancerous embryonic kidney cells, in comparison to respective free ligands, triapine and cisplatin. While the free ligands HL1 and HL2 were devoid of antiproliferative activity, their respective metal complexes showed remarkable antiproliferative activity in a micromolar concentration range. The activity was not related to the inhibition of ribonucleotide reductase (RNR) R2 protein, but rather to cancer cell homeostasis disturbance—leading to the disruption of cancer cell signalling.
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Affiliation(s)
- Kateryna Ohui
- Institute of Inorganic Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria; (K.O.); (I.B.); (R.S.)
| | - Iryna Stepanenko
- Institute of Inorganic Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria; (K.O.); (I.B.); (R.S.)
- Correspondence: (I.S.); (V.B.A.)
| | - Iuliana Besleaga
- Institute of Inorganic Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria; (K.O.); (I.B.); (R.S.)
| | - Maria V. Babak
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore;
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR 999077, China
| | - Radu Stafi
- Institute of Inorganic Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria; (K.O.); (I.B.); (R.S.)
| | - Denisa Darvasiova
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia; (D.D.); (P.R.)
| | - Gerald Giester
- Department of Mineralogy and Crystallography, University of Vienna, Althan Strasse 14, A-1090 Vienna, Austria;
| | - Vivien Pósa
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; (V.P.); (E.A.E.)
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Eva A. Enyedy
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; (V.P.); (E.A.E.)
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Daniel Vegh
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Department of Organic Chemistry, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia;
| | - Peter Rapta
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia; (D.D.); (P.R.)
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore;
| | - Ana Popović-Bijelić
- Faculty of Physical Chemistry, University of Belgrade, 11158 Belgrade, Serbia;
| | - Vladimir B. Arion
- Institute of Inorganic Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria; (K.O.); (I.B.); (R.S.)
- Correspondence: (I.S.); (V.B.A.)
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22
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Tham MJR, Babak MV, Ang WH. PlatinER: A Highly Potent Anticancer Platinum(II) Complex that Induces Endoplasmic Reticulum Stress Driven Immunogenic Cell Death. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008604] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Max Jing Rui Tham
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
| | - Maria V. Babak
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
- Department of Chemistry City University of Hong Kong 83 Tat Chee Avenue 999077 Hong Kong SAR P. R. China
| | - Wee Han Ang
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
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23
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Tham MJR, Babak MV, Ang WH. PlatinER: A Highly Potent Anticancer Platinum(II) Complex that Induces Endoplasmic Reticulum Stress Driven Immunogenic Cell Death. Angew Chem Int Ed Engl 2020; 59:19070-19078. [DOI: 10.1002/anie.202008604] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Max Jing Rui Tham
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
| | - Maria V. Babak
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
- Department of Chemistry City University of Hong Kong 83 Tat Chee Avenue 999077 Hong Kong SAR P. R. China
| | - Wee Han Ang
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore 21 Lower Kent Ridge Road 119077 Singapore Singapoare
- Department of Chemistry National University of Singapore 3 Science Drive 2 117543 Singapore Singapore
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24
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Weng C, Shen L, Ang WH. Harnessing Endogenous Formate for Antibacterial Prodrug Activation by in cellulo Ruthenium-Mediated Transfer Hydrogenation Reaction. Angew Chem Int Ed Engl 2020; 59:9314-9318. [PMID: 32141662 DOI: 10.1002/anie.202000173] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 03/01/2020] [Indexed: 01/17/2023]
Abstract
The abundance and evolving pathogenic behavior of bacterial microorganisms give rise to antibiotic tolerance and resistance which pose a danger to global public health. New therapeutic strategies are needed to keep pace with this growing threat. We propose a novel approach for targeting bacteria by harnessing formate, a cell metabolite found only in particular bacterial species, to activate an antibacterial prodrug and selectively inhibit their growth. This strategy is premised on transfer hydrogenation reaction on a biorthogonal substrate utilizing native formate as the hydride source as a means of uncaging an antibacterial prodrug. Using coordination-directed 3-component assembly to prepare a library of 768 unique Ru-Arene Schiff-base complexes, we identified several candidates that efficiently reduced sulfonyl azide functional group in the presence of formate. This strategy paves the way for a new approach of targeted antibacterial therapy by exploiting unique bacterial metabolites.
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Affiliation(s)
- Cheng Weng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Linghui Shen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.,NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore
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25
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Weng C, Shen L, Ang WH. Harnessing Endogenous Formate for Antibacterial Prodrug Activation by
in cellulo
Ruthenium‐Mediated Transfer Hydrogenation Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Cheng Weng
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Linghui Shen
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Wee Han Ang
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and EngineeringNational University of Singapore 28 Medical Drive Singapore 117456 Singapore
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26
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Ong JX, Ang WH. Development of a Pre‐assembled Through‐Bond Energy Transfer (TBET) Fluorescent Probe for Ratiometric Sensing of Anticancer Platinum(ll) Complexes. Chem Asian J 2020; 15:1449-1455. [DOI: 10.1002/asia.202000157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/06/2020] [Indexed: 01/28/2023]
Affiliation(s)
- Jun Xiang Ong
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Wee Han Ang
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School for Integrative Sciences and EngineeringNational University of Singapore 28 Medical Drive Singapore 117456 Singapore
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27
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Ang WH, Xing B. AsBIC-9: The 9th Asian Biological Inorganic Chemistry Conference: Overview. J Inorg Biochem 2020; 202:110861. [DOI: 10.1016/j.jinorgbio.2019.110861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Li J, Yap SQ, Yoong SL, Nayak TR, Chandra GW, Ang WH, Panczyk T, Ramaprabhu S, Vashist SK, Sheu FS, Tan A, Pastorin G. Carbon nanotube bottles for incorporation, release and enhanced cytotoxic effect of cisplatin. Carbon N Y 2019; 50:1625-1634. [PMID: 31105316 PMCID: PMC6522380 DOI: 10.1016/j.carbon.2011.11.043] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Carbon nanotubes (CNTs) have emerged as promising drug delivery systems particularly for cancer therapy, due to their abilities to overcome some of the challenges faced by cancer treatment, namely non-specificity, poor permeability into tumour tissues, and poor stability of anticancer drugs. Encapsulation of anticancer agents inside CNTs provides protection from external deactivating agents. However, the open ends of the CNTs leave the encapsulated drugs exposed to the environment and eventually their uncontrolled release before reaching the desired target. In this study, we report the successful encapsulation of cisplatin, a FDA-approved chemotherapeutic drug, into multi-walled carbon nanotubes and the capping at the ends with functionalised gold nanoparticles to achieve a "carbon nanotube bottle" structure. In this proof-of-concept study, these caps did not prevent the encapsulation of drug in the inner space of CNTs; on the contrary, we achieved higher drug loading inside the nanotubes in comparison with data reported in literature. In addition, we demonstrated that encapsulated cisplatin could be delivered in living cells under physiological conditions to exert its pharmacological action.
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Affiliation(s)
- Jian Li
- Department of Pharmacy, National University of Singapore, Science Drive 2, S15#05-PI-03, Singapore 117543, Singapore
| | - Siew Qi Yap
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, S15#05-PI-01, Singapore 117543, Singapore
| | - Sia Lee Yoong
- NUS Graduate School for Integrative Sciences and Engineering, Centre for Life Sciences (CeLS), 28 Medical Drive, #05-01, Singapore 117456, Singapore
| | - Tapas Ranjan Nayak
- Department of Pharmacy, National University of Singapore, Science Drive 2, S15#05-PI-03, Singapore 117543, Singapore
| | - Gary Wiratama Chandra
- Department of Pharmacy, National University of Singapore, Science Drive 2, S15#05-PI-03, Singapore 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, S15#05-PI-01, Singapore 117543, Singapore
| | - Tomasz Panczyk
- Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences ul. Niezapominajek 8, 30239 Cracow, Poland
| | - Sundara Ramaprabhu
- Department of Physics, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Sandeep Kumar Vashist
- NUSNNI-NanoCore, National University of Singapore, T-Lab Level 11, 5A Engineering Drive 1, Singapore 117580, Singapore
| | - Fwu-Shan Sheu
- NUSNNI-NanoCore, National University of Singapore, T-Lab Level 11, 5A Engineering Drive 1, Singapore 117580, Singapore
| | - Aaron Tan
- Centre for Nanotechnology and Regenerative Medicine, UCL Division of Surgery and Interventional Science, University College London, UK
| | - Giorgia Pastorin
- Department of Pharmacy, National University of Singapore, Science Drive 2, S15#05-PI-03, Singapore 117543, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, Centre for Life Sciences (CeLS), 28 Medical Drive, #05-01, Singapore 117456, Singapore
- NUSNNI-NanoCore, National University of Singapore, T-Lab Level 11, 5A Engineering Drive 1, Singapore 117580, Singapore
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29
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Babak MV, Zhi Y, Czarny B, Toh TB, Hooi L, Chow EKH, Ang WH, Gibson D, Pastorin G. Dual-Targeting Dual-Action Platinum(IV) Platform for Enhanced Anticancer Activity and Reduced Nephrotoxicity. Angew Chem Int Ed Engl 2019; 58:8109-8114. [PMID: 30945417 DOI: 10.1002/anie.201903112] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Indexed: 01/16/2023]
Abstract
A novel and highly efficient dual-targeting platform was designed to ensure targeted in vivo delivery of dual-action PtIV prodrugs. The dual targeting was established by liposomal encapsulation of PtIV complexes, thereby utilizing the enhanced permeability and retention (EPR) effect as the first stage of targeting to attain a high accumulation of the drug-loaded liposomes in the tumor. After the release of the PtIV prodrug inside cancer cells, a second stage of targeting directed a portion of the PtIV prodrugs to the mitochondria. Upon intracellular reduction, these PtIV prodrugs released two bioactive molecules, acting both on the mitochondrial and on the nuclear DNA. Our PtIV system showed excellent activity in vitro and in vivo, characterized by a cytotoxicity in a low micromolar range and complete tumor remission, respectively. Notably, marked in vivo activity was accompanied by reduced kidney toxicity, highlighting the unique therapeutic potential of our novel dual-targeting dual-action platform.
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Affiliation(s)
- Maria V Babak
- Department of Pharmacy, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore.,Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Yang Zhi
- Department of Pharmacy, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore
| | - Bertrand Czarny
- School of Materials, Science and Engineering, and Lee Kong Chian School of Medicine (LKCmedicine), Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Tan Boon Toh
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, 117599, Singapore, Singapore
| | - Lissa Hooi
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, 117599, Singapore, Singapore
| | - Edward Kai-Hua Chow
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, 117599, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, Singapore
| | - Dan Gibson
- Institute for Drug Research, School of Pharmacy, The Hebrew University, Jerusalem, 91120, Israel
| | - Giorgia Pastorin
- Department of Pharmacy, National University of Singapore, 3 Science Drive 2, 117543, Singapore, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, Singapore.,NUS Nanoscience & Nanotechnology Initiative (NUSNNI), National University of Singapore, 2 Engineering Drive 3, 117411, Singapore, Singapore
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30
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Abstract
Platinum(iv) carboxylate scaffolds have garnered considerable research interest because they can be engineered to function as prodrugs of clinical platinum(ii) anticancer drugs. These platinum(iv) prodrug complexes are stable and tunable, and activated by reduction to release their cytotoxic platinum(ii) cargo. Here we propose new platinum(iv) prodrug complexes designed to release cisplatin via photoreduction upon UV irradiation. The central strategy is to utilise aryl carboxylate ligands on the axial positions of that platinum(iv) scaffold that confer significant UV absorption and would stabilise carboxyl radical formation, thus favouring homolytic Pt-O bond cleavage. We isolated and identified aryl carboxyl radicals via spin-trapping and showed that the photoreduced platinum species mirror cisplatin reactivity toward DNA bases, thereby validating the efficacy of this approach.
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Affiliation(s)
- Violet Eng Yee Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543. and NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore 119077
| | - Chee Fei Chin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543. and NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore 119077
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31
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Ong JX, Lim CSQ, Le HV, Ang WH. A Ratiometric Fluorescent Probe for Cisplatin: Investigating the Intracellular Reduction of Platinum(IV) Prodrug Complexes. Angew Chem Int Ed Engl 2018; 58:164-167. [PMID: 30407697 DOI: 10.1002/anie.201810361] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 10/15/2018] [Indexed: 01/02/2023]
Abstract
The PtIV prodrug strategy has emerged as an excellent alternative to tackle the problems associated with conventional PtII drug therapy. However, there is a lack of tools to study how this new class of PtIV drugs are processed at the cellular level. Herein, we report the first ratiometric probe for cisplatin detection and use it to investigate PtIV anticancer complexes in biological systems. The probe was able to distinguish between cisplatin and its PtIV derivatives, allowing us to probe the intracellular reduction of PtIV prodrug complexes. The correlation between the amount of active PtII species available after intracellular reduction of PtIV complexes and their cytotoxicity and the role glutathione plays in the reduction of PtIV complexes were investigated.
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Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Carine Shu Qing Lim
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Hai Van Le
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.,NUS Graduate School of Integrative Sciences and Engineering, Institution, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore
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32
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Ong JX, Lim CSQ, Le HV, Ang WH. A Ratiometric Fluorescent Probe for Cisplatin: Investigating the Intracellular Reduction of Platinum(IV) Prodrug Complexes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810361] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Carine Shu Qing Lim
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Hai Van Le
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Wee Han Ang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School of Integrative Sciences and Engineering, Institution; National University of Singapore; 28 Medical Drive Singapore 117456 Singapore
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33
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Orlowska E, Babak MV, Dömötör O, Enyedy EA, Rapta P, Zalibera M, Bučinský L, Malček M, Govind C, Karunakaran V, Farid YCS, McDonnell TE, Luneau D, Schaniel D, Ang WH, Arion VB. NO Releasing and Anticancer Properties of Octahedral Ruthenium–Nitrosyl Complexes with Equatorial 1H-Indazole Ligands. Inorg Chem 2018; 57:10702-10717. [DOI: 10.1021/acs.inorgchem.8b01341] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ewelina Orlowska
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
| | - Maria V. Babak
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore
| | - Orsolya Dömötör
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dom ter 7, H-6720 Szeged, Hungary
| | - Eva A. Enyedy
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dom ter 7, H-6720 Szeged, Hungary
| | - Peter Rapta
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Michal Zalibera
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Lukáš Bučinský
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Michal Malček
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
- LAQV@REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Chinju Govind
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019 Kerala India
| | - Venugopal Karunakaran
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019 Kerala India
| | | | - Tara E. McDonnell
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Kensington, Sydney, New South Wales 2052, Australia
| | - Dominique Luneau
- Laboratoire des Multimatériaux et Interfaces (UMR5615), Université Claude Bernard Lyon 1, Campus de la Doua, 69622 Villeurbanne Cedex, France
| | | | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore
| | - Vladimir B. Arion
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
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34
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Sîrbu A, Palamarciuc O, Babak MV, Lim JM, Ohui K, Enyedy EA, Shova S, Darvasiová D, Rapta P, Ang WH, Arion VB. Copper(ii) thiosemicarbazone complexes induce marked ROS accumulation and promote nrf2-mediated antioxidant response in highly resistant breast cancer cells. Dalton Trans 2018; 46:3833-3847. [PMID: 28271099 DOI: 10.1039/c7dt00283a] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of water-soluble sodium salts of 3-formyl-4-hydroxybenzenesulfonic acid thiosemicarbazones (or sodium 5-sulfonate-salicylaldehyde thiosemicarbazones) containing different substituents at the terminal nitrogen atom (H, Me, Et, Ph) and their copper(ii) complexes have been prepared and characterised by elemental analysis, spectroscopic techniques (IR, UV-vis, 1H NMR), ESI mass spectrometry, X-ray crystallography and cyclic voltammetry. The proligands and their copper(ii) complexes exhibit moderate water solubility and good stability in aqueous environment, determined by investigating their proton dissociation and complex formation equilibria. The copper(ii) complexes showed moderate anticancer activity in established human cancer cell lines, while the proligands were devoid of cytotoxicity. The anticancer activity of the copper(ii) complexes correlates with their ability to induce ROS accumulation in cells, consistent with their redox potentials within the biological window, triggering the activation of antioxidation defense mechanisms in response to the ROS insult. These studies pave the way for the investigation of ROS-inducing copper(ii) complexes as prospective antiproliferative agents in cancer chemotherapy.
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Affiliation(s)
- Angela Sîrbu
- Moldova State University, Department of Chemistry, A. Mateevici Street 60, MD-2009, Chisinau, Republic of Moldova
| | - Oleg Palamarciuc
- Moldova State University, Department of Chemistry, A. Mateevici Street 60, MD-2009, Chisinau, Republic of Moldova
| | - Maria V Babak
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
| | - Jia Min Lim
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
| | - Kateryna Ohui
- Institute of Inorganic Chemistry of the University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria.
| | - Eva A Enyedy
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7., H-6720 Szeged, Hungary
| | - Sergiu Shova
- Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, Nr. 41A, 700487 Iasi, Romania
| | - Denisa Darvasiová
- Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Peter Rapta
- Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
| | - Vladimir B Arion
- Institute of Inorganic Chemistry of the University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria.
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35
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Chow MJ, Babak MV, Tan KW, Cheong MC, Pastorin G, Gaiddon C, Ang WH. Induction of the Endoplasmic Reticulum Stress Pathway by Highly Cytotoxic Organoruthenium Schiff-Base Complexes. Mol Pharm 2018; 15:3020-3031. [PMID: 29979603 DOI: 10.1021/acs.molpharmaceut.8b00003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Current anticancer drug discovery efforts focus on the identification of first-in-class compounds with a mode-of-action distinct from conventional DNA-targeting agents for chemotherapy. An emerging trend is the identification of endoplasmic reticulum (ER) targeting compounds that induce ER stress in cancer cells, leading to cell death. However, a limited pool of such compounds has been identified to date, and there are limited studies done on such compounds to allow for the rational design of ER stress-inducing agents. In our present study, we present a series of highly cytotoxic, ER stress-inducing Ru(II)-arene Schiff-Base (RAS) complexes, bearing iminoquinoline chelate ligands. We demonstrate that by structural modification to the iminoquinoline ligand, we could tune its π-acidity and influence reactive oxygen species (ROS) induction, switching between a ROS-mediated ER stress pathway activation and one that is not mediated by ROS induction. Our current study adds to the available ER stress inducers and shows how structural tuning could be used as a means to modulate the mode-of-action of such compounds.
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Affiliation(s)
- Mun Juinn Chow
- Centre for Translational Medicine , Cancer Science Institute of Singapore, National University of Singapore , MD6 Centre for Translational Medicine, 14 Medical Drive , 117599 Singapore
| | - Maria V Babak
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore
| | - Kwan Wei Tan
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore
| | - Mei Chi Cheong
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore
| | - Giorgia Pastorin
- Department of Pharmacy , National University of Singapore , 3 Science Drive 3 , 117543 Singapore.,NUS Graduate School for Integrative Sciences and Engineering , 117456 Singapore
| | - Christian Gaiddon
- U1113 INSERM , 3 Avenue Molière , Strasbourg 67200 , France.,Oncology Section, FMTS , Université de Strasbourg , Strasbourg 67200 , France
| | - Wee Han Ang
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore.,NUS Graduate School for Integrative Sciences and Engineering , 117456 Singapore
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36
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Lee KGZ, Babak MV, Weiss A, Dyson PJ, Nowak-Sliwinska P, Montagner D, Ang WH. Development of an Efficient Dual-Action GST-Inhibiting Anticancer Platinum(IV) Prodrug. ChemMedChem 2018; 13:1210-1217. [PMID: 29637702 DOI: 10.1002/cmdc.201800105] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/27/2018] [Indexed: 01/19/2023]
Abstract
The cytotoxicity of cisplatin (cDDP) is enhanced when co-administered with ethacrynic acid (EA), a glutathione S-transferase (GST) inhibitor. A PtIV -EA conjugate containing a cDDP core and two axial ethacrynate ligands (compound 1) was shown to be an excellent inhibitor of GST, but did not readily release a PtII species to exert a synergistic cytotoxic effect. In this study, a redesigned PtIV construct composed of a cDDP core with one axial ethacrynate ligand and one axial hydroxido ligand (compound 2) was prepared and shown to overcome the limitations of compound 1. The EA ligand in 2 is readily released in vitro together with a cytotoxic PtII species derived from cisplatin, working together to inhibit cell proliferation in cDDP-resistant human ovarian cancer cells. The in vitro activity translates well in vivo with 2, showing effective (∼80 %) inhibition of tumor growth in a human ovarian carcinoma A2780 tumor model, while showing considerably lower toxicity than cisplatin, thus validating the new design strategy.
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Affiliation(s)
- Keefe Guang Zhi Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Maria V Babak
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Andrea Weiss
- School of Pharmaceutical Science, University of Geneva (UNIGE), 1211, Geneva, Switzerland
| | - Paul J Dyson
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | | | - Diego Montagner
- Department of Chemistry, Maynooth University, Maynooth, Ireland
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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37
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De S, Babak MV, Hülsey MJ, Ang WH, Yan N. Designed Precursor for the Controlled Synthesis of Highly Active Atomic and Sub-nanometric Platinum Catalysts on Mesoporous Silica. Chem Asian J 2018; 13:1053-1059. [DOI: 10.1002/asia.201800125] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 02/20/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Sudipta De
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 117585 Singapore Singapore
| | - Maria V. Babak
- Department of Chemistry; National University of Singapore; 3 Science Drive 2 117543 Singapore Singapore
| | - Max J. Hülsey
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 117585 Singapore Singapore
| | - Wee Han Ang
- Department of Chemistry; National University of Singapore; 3 Science Drive 2 117543 Singapore Singapore
| | - Ning Yan
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 117585 Singapore Singapore
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38
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Babak MV, Ang WH. Multinuclear Organometallic Ruthenium-Arene Complexes for Cancer Therapy. Met Ions Life Sci 2018; 18:/books/9783110470734/9783110470734-007/9783110470734-012.xml. [PMID: 29394025 DOI: 10.1515/9783110470734-012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
There has been much recent interest in the development of therapeutic transition metal-based complexes in part fueled by the clinical success of the platinum(II) anticancer drug, cisplatin. Yet known platinum drugs are limited by their high toxicity, severe side-effects, and incidences of drug resistance. Organometallic ruthenium-arene complexes have risen to prominence as a pharmacophore due to the success of other ruthenium drug candidates in clinical trials. In this chapter, we highlight higher order multinuclear ruthenium-arene complexes and their respective investigations as chemotherapeutic agents. We discuss their unique structural properties and the associated biochemical evaluation in the context of anticancer drug design. We also review the structural considerations for the design of these scaffolds and new therapeutic applications that are uncovered for this class of complexes.
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39
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Ong JX, Pang VYT, Tng LM, Ang WH. Pre-Assembled Coumarin-Rhodamine Scaffold for Ratiometric Sensing of Nitric Oxide and Hypochlorite. Chemistry 2018; 24:1870-1876. [DOI: 10.1002/chem.201703554] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Victoria Yu Ting Pang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Li Min Tng
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Wee Han Ang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
- NUS Graduate School for Integrative Sciences and Engineering; National University of Singapore; 28 Medical Drive Singapore 117456 Singapore
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40
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Chow MJ, Alfiean M, Pastorin G, Gaiddon C, Ang WH. Apoptosis-independent organoruthenium anticancer complexes that overcome multidrug resistance: self-assembly and phenotypic screening strategies. Chem Sci 2017; 8:3641-3649. [PMID: 30155208 PMCID: PMC6094174 DOI: 10.1039/c7sc00497d] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 02/22/2017] [Indexed: 01/20/2023] Open
Abstract
Multidrug resistance is a major impediment to chemotherapy and limits the efficacies of conventional anticancer drugs. A strategy to bypass multidrug resistance is to develop new drug candidates capable of inducing apoptosis-independent programmed cell death. However, cellular pathways implicated in alternative programmed cell death are not well-elucidated and multifactorial, making a target-based discovery approach a challenge. Here, we show that a coordination-directed three-component assembly and phenotypic screening strategy could be employed as a viable alternative for the identification of apoptosis-independent organoruthenium anticancer agents. Through an on-plate synthesis and screening of 195 organoruthenium complexes against apoptosis-sensitive and -resistant cancers, we identified two apoptosis-independent hits. Subsequent validation of the two hits showed a lack of induction of apoptotic biomarkers, a caspase-independent activity and an equal efficacy in both apoptosis-sensitive and -resistant colorectal cancers. This validated their apoptosis-independent modes-of-action, paving the way as potential candidates for the treatment of highly-refractory cancer phenotypes.
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Affiliation(s)
- Mun Juinn Chow
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore .
| | - Mohammad Alfiean
- School of Chemistry and Life Sciences , Nanyang Polytechnic , Singapore
| | - Giorgia Pastorin
- Department of Pharmacy , National University of Singapore , 3 Science Drive 3 , 117543 Singapore
- NUS Graduate School for Integrative Sciences and Engineering , Singapore . ; Tel: +65 6516 5131
| | - Christian Gaiddon
- Université de Strasbourg , Strasbourg , France
- U1113 INSERM , 3 Avenue Molière , Strasbourg 67200 , France
| | - Wee Han Ang
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore .
- NUS Graduate School for Integrative Sciences and Engineering , Singapore . ; Tel: +65 6516 5131
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41
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Yap SQ, Chin CF, Hong Thng AH, Pang YY, Ho HK, Ang WH. Finely Tuned Asymmetric Platinum(IV) Anticancer Complexes: Structure-Activity Relationship and Application as Orally Available Prodrugs. ChemMedChem 2017; 12:300-311. [PMID: 28028938 DOI: 10.1002/cmdc.201600577] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/22/2016] [Indexed: 01/12/2023]
Abstract
Platinum(IV) bis-carboxylates are highly versatile prodrug scaffolds with different axial ligands that can be functionalized while keeping the platinum(II) pharmacophore intact. Using a sequential acylation strategy, we developed a class of PtIV prodrugs of cisplatin with contrasting lipophilic and hydrophilic ligands. We investigated their stability, reduction rates, lipophilicity, aqueous solubility, and antiproliferative efficacies, and assessed for correlations among the parameters that could be useful in drug design. We showed that compounds with high lipophilicity result in better antiproliferative effects in vitro and in vivo, with one of the three compounds tested showing better efficacy than satraplatin against an animal model of colorectal cancer, owing to its higher solubility and lower reduction rates. Our asymmetric PtIV prodrugs may pave the way for a highly predictable, fine-tuned class of orally available PtIV prodrugs for the treatment of colorectal cancer.
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Affiliation(s)
- Siew Qi Yap
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Chee Fei Chin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Agnes Hwee Hong Thng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Yi Yun Pang
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore, 117543, Singapore
| | - Han Kiat Ho
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore, 117543, Singapore.,NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.,NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore
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42
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Tram DTN, Wang H, Sugiarto S, Li T, Ang WH, Lee C, Pastorin G. Advances in nanomaterials and their applications in point of care (POC) devices for the diagnosis of infectious diseases. Biotechnol Adv 2016; 34:1275-1288. [PMID: 27686397 PMCID: PMC7127209 DOI: 10.1016/j.biotechadv.2016.09.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 07/13/2016] [Accepted: 09/23/2016] [Indexed: 01/17/2023]
Abstract
Nanotechnology has gained much attention over the last decades, as it offers unique opportunities for the advancement of the next generation of sensing tools. Point-of-care (POC) devices for the selective detection of biomolecules using engineered nanoparticles have become a main research thrust in the diagnostic field. This review presents an overview on how the POC-associated nanotechnology, currently applied for the identification of nucleic acids, proteins and antibodies, might be further exploited for the detection of infectious pathogens: although still premature, future integrations of nanoparticles with biological markers that target specific microorganisms will enable timely therapeutic intervention against life-threatening infectious diseases.
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Affiliation(s)
- Dai Thien Nhan Tram
- Pharmacy Department National University of Singapore, Singapore 117543, Singapore.
| | - Hao Wang
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering, Drive 3, Singapore 117576, Singapore.
| | - Sigit Sugiarto
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
| | - Tao Li
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
| | - Chengkuo Lee
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering, Drive 3, Singapore 117576, Singapore.
| | - Giorgia Pastorin
- Pharmacy Department National University of Singapore, Singapore 117543, Singapore; NanoCore, Faculty of Engineering, National University of Singapore, Singapore 117576, Singapore; NUS Graduate School for Integrative Sciences and Engineering, Centre for Life Sciences (CeLS), Singapore 117456, Singapore.
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43
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Chow MJ, Licona C, Pastorin G, Mellitzer G, Ang WH, Gaiddon C. Structural tuning of organoruthenium compounds allows oxidative switch to control ER stress pathways and bypass multidrug resistance. Chem Sci 2016; 7:4117-4124. [PMID: 30155055 PMCID: PMC6013925 DOI: 10.1039/c6sc00268d] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 02/25/2016] [Indexed: 12/12/2022] Open
Abstract
Multidrug resistance (MDR) is a major impediment to the success of chemotherapy in many cancer types. One particular MDR mechanism is the inherent or acquired adaptation of the cellular survival pathways that render malignant cells resistant to apoptotic cell death. Since most drugs act through apoptosis, compounds capable of inducing alternative forms of programmed cell death (PCD) can potentially be harnessed to bypass MDR. We investigated two organoruthenium complexes, RAS-1H and RAS-1T, and demonstrated that although they both induced non-apoptotic PCD through ER stress pathways, their modes-of-action were drastically different despite modest structural variations. RAS-1T acted through ROS-mediated ER stress while RAS-1H was ROS-independent. We further showed that they were more efficacious against apoptosis-resistant cells compared to clinical drugs including oxaliplatin. This work provides the basis for underpinning ER stress modulation using metal complexes to bypass apoptosis resistance.
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Affiliation(s)
- Mun Juinn Chow
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore . ; Tel: +65 6516 5131
- NUS Graduate School for Integrative Sciences and Engineering , Singapore
| | - Cynthia Licona
- U1113 INSERM , 3 Avenue Molière , Strasbourg 67200 , France . ; Tel: +33 68 52 53 56
- Section Oncology , FMTS , Strasbourg University , Strasbourg , France
| | - Giorgia Pastorin
- NUS Graduate School for Integrative Sciences and Engineering , Singapore
- Department of Pharmacy , National University of Singapore , 18 Science Drive 4 , 117543 Singapore
| | - Georg Mellitzer
- U1113 INSERM , 3 Avenue Molière , Strasbourg 67200 , France . ; Tel: +33 68 52 53 56
- Section Oncology , FMTS , Strasbourg University , Strasbourg , France
| | - Wee Han Ang
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , 117543 Singapore . ; Tel: +65 6516 5131
- NUS Graduate School for Integrative Sciences and Engineering , Singapore
| | - Christian Gaiddon
- U1113 INSERM , 3 Avenue Molière , Strasbourg 67200 , France . ; Tel: +33 68 52 53 56
- Section Oncology , FMTS , Strasbourg University , Strasbourg , France
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Chow MJ, Babak MV, Wong DYQ, Pastorin G, Gaiddon C, Ang WH. Structural Determinants of p53-Independence in Anticancer Ruthenium-Arene Schiff-Base Complexes. Mol Pharm 2016; 13:2543-54. [PMID: 27174050 DOI: 10.1021/acs.molpharmaceut.6b00348] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
p53 is a key tumor suppressor gene involved in key cellular processes and implicated in cancer therapy. However, it is inactivated in more than 50% of all cancers due to mutation or overexpression of its negative regulators. This leads to drug resistance and poor chemotherapeutic outcome as most clinical drugs act via a p53-dependent mechanism of action. An attractive strategy to circumvent this resistance would be to identify new anticancer drugs that act via p53-independent mode of action. In the present study, we identified 9 Ru (II)-Arene Schiff-base (RAS) complexes able to induce p53-independent cytotoxicity and discuss structural features that are required for their p53-independent activity. Increasing hydrophobicity led to an increase in cellular accumulation in cells with a corresponding increase in efficacy. We further showed that all nine complexes demonstrated p53-independent activity. This was despite significant differences in their physicochemical properties, suggesting that the iminoquinoline ligand, a common structural feature for all the complexes, is required for the p53-independent activity.
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Affiliation(s)
- Mun Juinn Chow
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543 Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , 28 Medical Drive, 117456 Singapore
| | - Maria V Babak
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543 Singapore
| | - Daniel Yuan Qiang Wong
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543 Singapore
| | - Giorgia Pastorin
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , 28 Medical Drive, 117456 Singapore.,Department of Pharmacy, National University of Singapore , 18 Science Drive 4, 117543 Singapore
| | - Christian Gaiddon
- U1113 INSERM, 3 Avenue Molière, Strasbourg 67200, France.,Oncology Section, FMTS, Université de Strasbourg , F-67081 Strasbourg, France
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543 Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , 28 Medical Drive, 117456 Singapore
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Nguyen TTT, Lim YJ, Fan MHM, Jackson RA, Lim KK, Ang WH, Ban KHK, Chen ES. Calcium modulation of doxorubicin cytotoxicity in yeast and human cells. Genes Cells 2016; 21:226-40. [DOI: 10.1111/gtc.12346] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 11/29/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Thi Thuy Trang Nguyen
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
- National University Health System; Singapore
| | - Ying Jun Lim
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
- National University Health System; Singapore
| | - Melanie Hui Min Fan
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
- National University Health System; Singapore
| | - Rebecca A. Jackson
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
| | - Kim Kiat Lim
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
- National University Health System; Singapore
| | - Wee Han Ang
- Department of Chemistry; Faculty of Science; National University of Singapore; Singapore
| | - Kenneth Hon Kim Ban
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
- National University Health System; Singapore
| | - Ee Sin Chen
- Department of Biochemistry; Yong Loo Lin School of Medicine; National University of Singapore; Singapore
- National University Health System; Singapore
- NUS Graduate School of Science & Engineering; National University of Singapore; Singapore
- NUS Synthetic Biology for Clinical and Technological Innovation (SynCTI); Life Sciences Institute; National University of Singapore; Singapore
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Nguyen TTT, Chua JKK, Seah KS, Koo SH, Yee JY, Yang EG, Lim KK, Pang SYW, Yuen A, Zhang L, Ang WH, Dymock B, Lee EJD, Chen ES. Predicting chemotherapeutic drug combinations through gene network profiling. Sci Rep 2016; 6:18658. [PMID: 26791325 PMCID: PMC4726371 DOI: 10.1038/srep18658] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 11/23/2015] [Indexed: 12/29/2022] Open
Abstract
Contemporary chemotherapeutic treatments incorporate the use of several agents in combination. However, selecting the most appropriate drugs for such therapy is not necessarily an easy or straightforward task. Here, we describe a targeted approach that can facilitate the reliable selection of chemotherapeutic drug combinations through the interrogation of drug-resistance gene networks. Our method employed single-cell eukaryote fission yeast (Schizosaccharomyces pombe) as a model of proliferating cells to delineate a drug resistance gene network using a synthetic lethality workflow. Using the results of a previous unbiased screen, we assessed the genetic overlap of doxorubicin with six other drugs harboring varied mechanisms of action. Using this fission yeast model, drug-specific ontological sub-classifications were identified through the computation of relative hypersensitivities. We found that human gastric adenocarcinoma cells can be sensitized to doxorubicin by concomitant treatment with cisplatin, an intra-DNA strand crosslinking agent, and suberoylanilide hydroxamic acid, a histone deacetylase inhibitor. Our findings point to the utility of fission yeast as a model and the differential targeting of a conserved gene interaction network when screening for successful chemotherapeutic drug combinations for human cells.
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Affiliation(s)
- Thi Thuy Trang Nguyen
- Department of Biochemistry, National University of Singapore, Singapore.,National University Health System (NUHS), Singapore
| | - Jacqueline Kia Kee Chua
- Department of Biochemistry, National University of Singapore, Singapore.,Department of Chemistry, Faculty of Science, National University of Singapore, Singapore
| | - Kwi Shan Seah
- Department of Biochemistry, National University of Singapore, Singapore.,National University Health System (NUHS), Singapore
| | - Seok Hwee Koo
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Changi General Hospital, Ministry of Health, Singapore
| | - Jie Yin Yee
- National University Health System (NUHS), Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Eugene Guorong Yang
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore
| | - Kim Kiat Lim
- Department of Biochemistry, National University of Singapore, Singapore.,National University Health System (NUHS), Singapore
| | | | - Audrey Yuen
- School of Chemical and Life Sciences, Singapore Polytechnic, Singapore
| | - Louxin Zhang
- Department of Mathematics, Faculty of Science, National University of Singapore, Singapore
| | - Wee Han Ang
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore.,Department of Chemistry, Faculty of Science, National University of Singapore, Singapore
| | - Brian Dymock
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore
| | - Edmund Jon Deoon Lee
- National University Health System (NUHS), Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Ee Sin Chen
- Department of Biochemistry, National University of Singapore, Singapore.,National University Health System (NUHS), Singapore.,NUS Synthetic Biology for Clinical and Technological Innovation (SynCTI), Life Sciences Institute, National University of Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
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Ong JX, Yap JY, Yap SQ, Ang WH. Structure-activity relationship studies on rhodamine B-based fluorogenic probes and their activation by anticancer platinum(II) compounds. J Inorg Biochem 2015; 153:272-278. [PMID: 26518138 DOI: 10.1016/j.jinorgbio.2015.10.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 10/02/2015] [Accepted: 10/05/2015] [Indexed: 01/27/2023]
Abstract
Fluorescence microscopy has emerged as an attractive technique for imaging intracellular Pt species arising from exposure to clinical anticancer drugs such as cisplatin. A rhodamine-B based fluorogenic probe termed Rho-DDTC can be activated selectively in the presence of Pt(II) compounds, and possesses the ability to discriminate Pt(II) species from Pt(IV) carboxylate prodrug complexes, thereby providing a unique platform to investigate the reduction of these Pt(IV) complexes after cell entry. In this report, we seek to establish the mechanism of activation of Rho-DDTC through a structure-activity relationship study on its structural analogues.
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Affiliation(s)
- Jun Xiang Ong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jian Yu Yap
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
| | - Siew Qi Yap
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore.
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Bi X, Adriani G, Xu Y, Chakrabortty S, Pastorin G, Ho HK, Ang WH, Chan Y. Gene Detection in Complex Biological Media Using Semiconductor Nanorods within an Integrated Microfluidic Device. Anal Chem 2015; 87:10292-8. [PMID: 26382664 DOI: 10.1021/acs.analchem.5b01942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The salient optical properties of highly luminescent semiconductor nanocrystals render them ideal fluorophores for clinical diagnostics, therapeutics, and highly sensitive biochip applications. Microfluidic systems allow miniaturization and integration of multiple biochemical processes in a single device and do not require sophisticated diagnostic tools. Herein, we describe a microfluidic system that integrates RNA extraction, reverse transcription to cDNA, amplification and detection within one integrated device to detect histidine decarboxylase (HDC) gene directly from human white blood cells samples. When anisotropic semiconductor nanorods (NRs) were used as the fluorescent probes, the detection limit was found to be 0.4 ng of total RNA, which was much lower than that obtained using spherical quantum dots (QDs) or organic dyes. This was attributed to the large action cross-section of NRs and their high probability of target capture in a pull-down detection scheme. The combination of large scale integrated microfluidics with highly fluorescent semiconductor NRs may find widespread utility in point-of-care devices and multitarget diagnostics.
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Affiliation(s)
- Xinyan Bi
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore
| | - Giulia Adriani
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore
| | - Yang Xu
- Institute of Materials Research & Engineering A*STAR , 3 Research Link, Singapore 117602, Singapore
| | - Sabyasachi Chakrabortty
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore
| | - Giorgia Pastorin
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543, Singapore
| | - Han Kiat Ho
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543, Singapore
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore
| | - Yinthai Chan
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.,Institute of Materials Research & Engineering A*STAR , 3 Research Link, Singapore 117602, Singapore
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Chua EYD, Davey GE, Chin CF, Dröge P, Ang WH, Davey CA. Stereochemical control of nucleosome targeting by platinum-intercalator antitumor agents. Nucleic Acids Res 2015; 43:5284-96. [PMID: 25916851 PMCID: PMC4477649 DOI: 10.1093/nar/gkv356] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 04/02/2015] [Indexed: 11/15/2022] Open
Abstract
Platinum-based anticancer drugs act therapeutically by forming DNA adducts, but suffer from severe toxicity and resistance problems, which have not been overcome in spite of decades of research. And yet defined chromatin targets have generally not been considered in the drug development process. Here we designed novel platinum-intercalator species to target a highly deformed DNA site near the nucleosome center. Between two seemingly similar structural isomers, we find a striking difference in DNA site selectivity in vitro, which comes about from stereochemical constraints that limit the reactivity of the trans isomer to special DNA sequence elements while still allowing the cis isomer to efficiently form adducts at internal sites in the nucleosome core. This gives the potential for controlling nucleosome site targeting in vivo, which would engender sensitivity to epigenetic distinctions and in particular cell type/status-dependent differences in nucleosome positioning. Moreover, while both compounds yield very similar DNA-adduct structures and display antitumor cell activity rivalling that of cisplatin, the cis isomer, relative to the trans, has a much more rapid cytotoxic effect and distinct impact on cell function. The novel stereochemical principles for controlling DNA site selectivity we discovered could aid in the design of improved site discriminating agents.
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Affiliation(s)
- Eugene Y D Chua
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Gabriela E Davey
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Chee Fei Chin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Peter Dröge
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Curt A Davey
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
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