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Legin AA, Schintlmeister A, Sommerfeld NS, Eckhard M, Theiner S, Reipert S, Strohhofer D, Jakupec MA, Galanski MS, Wagner M, Keppler BK. Nano-scale imaging of dual stable isotope labeled oxaliplatin in human colon cancer cells reveals the nucleolus as a putative node for therapeutic effect. NANOSCALE ADVANCES 2021; 3:249-262. [PMID: 36131874 PMCID: PMC9419577 DOI: 10.1039/d0na00685h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/11/2020] [Indexed: 05/04/2023]
Abstract
Oxaliplatin shows a superior clinical activity in colorectal cancer compared to cisplatin. Nevertheless, the knowledge about its cellular distribution and the mechanisms responsible for the different range of oxaliplatin-responsive tumors is far from complete. In this study, we combined highly sensitive element specific and isotope selective imaging by nanometer-scale secondary ion mass spectrometry (NanoSIMS) with transmission electron microscopy to investigate the subcellular accumulation of oxaliplatin in three human colon cancer cell lines (SW480, HCT116 wt, HCT116 OxR). Oxaliplatin bearing dual stable isotope labeled moieties, i.e. 2H-labeled diaminocyclohexane (DACH) and 13C-labeled oxalate, were applied for comparative analysis of the subcellular distribution patterns of the central metal and the ligands. In all the investigated cell lines, oxaliplatin was found to have a pronounced tendency for cytoplasmic aggregation in single membrane bound organelles, presumably related to various stages of the endocytic pathway. Moreover, nuclear structures, heterochromatin and in particular nucleoli, were affected by platinum-drug exposure. In order to explore the consequences of oxaliplatin resistance, subcellular drug distribution patterns were investigated in a pair of isogenic malignant cell lines with distinct levels of drug sensitivity (HCT116 wt and HCT116 OxR, the latter with acquired resistance to oxaliplatin). The subcellular platinum distribution was found to be similar in both cell lines, with only slightly higher accumulation in the sensitive HCT116 wt cells which is inconsistent with the resistance factor of more than 20-fold. Instead, the isotopic analysis revealed a disproportionally high accumulation of the oxalate ligand in the resistant cell line.
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Affiliation(s)
- Anton A Legin
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
- Research Cluster "Translational Cancer Therapy Research", University of Vienna A-1090 Vienna Austria
- Research Network "Chemistry Meets Microbiology and Environmental Systems Science", University of Vienna A-1090 Vienna Austria
| | - Arno Schintlmeister
- Research Network "Chemistry Meets Microbiology and Environmental Systems Science", University of Vienna A-1090 Vienna Austria
- Division of Microbial Ecology, Large-Instrument Facility for Environmental and Isotope Mass Spectrometry, Centre for Microbiology and Environmental Systems Science, University of Vienna A-1090 Vienna Austria
| | - Nadine S Sommerfeld
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
| | - Margret Eckhard
- Core Facility Cell Imaging and Ultrastructural Research, University of Vienna A-1090 Vienna Austria
| | - Sarah Theiner
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
- Research Cluster "Translational Cancer Therapy Research", University of Vienna A-1090 Vienna Austria
| | - Siegfried Reipert
- Core Facility Cell Imaging and Ultrastructural Research, University of Vienna A-1090 Vienna Austria
| | - Daniel Strohhofer
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
| | - Michael A Jakupec
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
- Research Cluster "Translational Cancer Therapy Research", University of Vienna A-1090 Vienna Austria
- Research Network "Chemistry Meets Microbiology and Environmental Systems Science", University of Vienna A-1090 Vienna Austria
| | - Mathea S Galanski
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
| | - Michael Wagner
- Research Network "Chemistry Meets Microbiology and Environmental Systems Science", University of Vienna A-1090 Vienna Austria
- Division of Microbial Ecology, Large-Instrument Facility for Environmental and Isotope Mass Spectrometry, Centre for Microbiology and Environmental Systems Science, University of Vienna A-1090 Vienna Austria
| | - Bernhard K Keppler
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna A-1090 Vienna Austria +43 1 4277 852601 +43 1 4277 52610
- Research Cluster "Translational Cancer Therapy Research", University of Vienna A-1090 Vienna Austria
- Research Network "Chemistry Meets Microbiology and Environmental Systems Science", University of Vienna A-1090 Vienna Austria
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Oka N, Komuro A, Amano H, Dash S, Honda M, Ota K, Nishimura S, Ueda T, Akagi M, Okada H. Ascorbate sensitizes human osteosarcoma cells to the cytostatic effects of cisplatin. Pharmacol Res Perspect 2020; 8:e00632. [PMID: 32725721 PMCID: PMC7387887 DOI: 10.1002/prp2.632] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 01/06/2023] Open
Abstract
Osteosarcoma (OS) is the most common malignant bone tumor and a leading cause of cancer-related deaths in children and adolescents. Current standard treatments for OS are a combination of preoperative chemotherapy, surgical resection, and adjuvant chemotherapy. Cisplatin is used as the standard chemotherapeutic for OS treatment, but it induces various adverse effects, limiting its clinical application. Improving treatment efficacy without increasing the cisplatin dosage is desirable. In the present study, we assessed the combined effect of ascorbate on cisplatin treatment using cultured human OS cells. Co-treatment with ascorbate induced greater suppression of OS cell but not nonmalignant cell proliferation. The chemosensitizing effect of ascorbate on cisplatin treatment was tightly linked to ROS production. Altered cellular redox state due to increased ROS production modified glycolysis and mitochondrial function in OS cells. In addition, OS cell sphere formation was markedly decreased, suggesting that ascorbate increased the treatment efficacy of cisplatin against stem-like cells in the cancer cell population. We also found that enhanced MYC signaling, ribosomal biogenesis, glycolysis, and mitochondrial respiration are key signatures in OS cells with cisplatin resistance. Furthermore, cisplatin resistance was reversed by ascorbate. Taken together, our findings provide a rationale for combining cisplatin with ascorbate in therapeutic strategies against OS.
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Affiliation(s)
- Naohiro Oka
- Department of OrthopedicsFaculty of MedicineKindai UniversityOsakaJapan
- Graduate School of Medical SciencesFaculty of MedicineKindai UniversityOsakaJapan
| | - Akiyoshi Komuro
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
| | - Hisayuki Amano
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
| | - Suman Dash
- Graduate School of Medical SciencesFaculty of MedicineKindai UniversityOsakaJapan
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
| | - Masahiko Honda
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
| | - Kazushige Ota
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
| | - Shunji Nishimura
- Department of OrthopedicsFaculty of MedicineKindai UniversityOsakaJapan
| | - Takeshi Ueda
- Graduate School of Medical SciencesFaculty of MedicineKindai UniversityOsakaJapan
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
| | - Masao Akagi
- Department of OrthopedicsFaculty of MedicineKindai UniversityOsakaJapan
- Graduate School of Medical SciencesFaculty of MedicineKindai UniversityOsakaJapan
| | - Hitoshi Okada
- Graduate School of Medical SciencesFaculty of MedicineKindai UniversityOsakaJapan
- Department of BiochemistryFaculty of MedicineKindai UniversityOsakaJapan
- Anti‐aging CenterKindai UniversityOsakaJapan
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3
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Tracking the cellular targets of platinum anticancer drugs: Current tools and emergent methods. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.118984] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Arjmand F, Afsan Z, Sharma S, Parveen S, Yousuf I, Sartaj S, Siddique HR, Tabassum S. Recent advances in metallodrug-like molecules targeting non-coding RNAs in cancer chemotherapy. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.02.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Noori M, Shafaatian B, Notash B. Synthesis of new platinum(IV) complexes through breaking disulfide bond; crystal structure determination, electrochemical, photoluminescence and DNA interaction investigation. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Plakos K, DeRose VJ. Mapping platinum adducts on yeast ribosomal RNA using high-throughput sequencing. Chem Commun (Camb) 2018; 53:12746-12749. [PMID: 29099140 DOI: 10.1039/c7cc06708a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Methods to map small-molecule binding sites on cellular RNAs are important for understanding interactions with both endogenous and exogenous compounds. Pt(ii) reagents are well-known DNA and RNA crosslinking agents, but sequence-specific and genome-wide identification of Pt targets following in-cell treatment is challenging. Here we describe application of high-throughput 'Pt-Seq' to identify Pt-rRNA adducts following treatment of S. cerevisiae with cisplatin.
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Affiliation(s)
- Kory Plakos
- Department of Chemistry and Biochemistry and Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA.
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7
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Štarha P, Vančo J, Trávníček Z. Platinum complexes containing adenine-based ligands: An overview of selected structural features. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.09.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Shu X, Xiong X, Song J, He C, Yi C. Base-Resolution Analysis of Cisplatin-DNA Adducts at the Genome Scale. Angew Chem Int Ed Engl 2016; 55:14246-14249. [PMID: 27736024 PMCID: PMC5131569 DOI: 10.1002/anie.201607380] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 09/17/2016] [Indexed: 11/05/2022]
Abstract
Cisplatin, one of the most widely used anticancer drugs, crosslinks DNA and ultimately induces cell death. However, the genomic pattern of cisplatin-DNA adducts has remained unknown owing to the lack of a reliable and sensitive genome-wide method. Herein we present "cisplatin-seq" to identify genome-wide cisplatin crosslinking sites at base resolution. Cisplatin-seq reveals that mitochondrial DNA is a preferred target of cisplatin. For nuclear genomes, cisplatin-DNA adducts are enriched within promoters and regions harboring transcription termination sites. While the density of GG dinucleotides determines the initial crosslinking of cisplatin, binding of proteins to the genome largely contributes to the accumulative pattern of cisplatin-DNA adducts.
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Affiliation(s)
- Xiaoting Shu
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Xushen Xiong
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Jinghui Song
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Chuan He
- Department of Chemistry, Department of Biochemistry and Molecular Biology, Institute for Biophysical Dynamics, Howard Hughes Medical Institute, The University of Chicago, 929 East 57th Street, Chicago, IL, 60637, USA.
- Department of Chemical Biology and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Beijing Advanced Innovation Center for Genomics, Peking University, Beijing, 100871, China.
| | - Chengqi Yi
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China.
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9
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Shu X, Xiong X, Song J, He C, Yi C. Base-Resolution Analysis of Cisplatin-DNA Adducts at the Genome Scale. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607380] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaoting Shu
- State Key Laboratory of Protein and Plant Gene Research; School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center; College of Chemistry and Molecular Engineering; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- Academy for Advanced Interdisciplinary Studies; Peking University; Beijing 100871 China
| | - Xushen Xiong
- State Key Laboratory of Protein and Plant Gene Research; School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center; College of Chemistry and Molecular Engineering; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- Academy for Advanced Interdisciplinary Studies; Peking University; Beijing 100871 China
| | - Jinghui Song
- State Key Laboratory of Protein and Plant Gene Research; School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center; College of Chemistry and Molecular Engineering; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
| | - Chuan He
- Department of Chemistry; Department of Biochemistry and Molecular Biology; Institute for Biophysical Dynamics; Howard Hughes Medical Institute; The University of Chicago; 929 East 57th Street Chicago IL 60637 USA
- Department of Chemical Biology and Synthetic and Functional Biomolecules Center; College of Chemistry and Molecular Engineering; Beijing Advanced Innovation Center for Genomics; Peking University; Beijing 100871 China
| | - Chengqi Yi
- State Key Laboratory of Protein and Plant Gene Research; School of Life Sciences, Department of Chemical Biology and Synthetic and Functional Biomolecules Center; College of Chemistry and Molecular Engineering; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
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Alberti E, Zampakou M, Donghi D. Covalent and non-covalent binding of metal complexes to RNA. J Inorg Biochem 2016; 163:278-291. [DOI: 10.1016/j.jinorgbio.2016.04.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/12/2016] [Accepted: 04/12/2016] [Indexed: 01/19/2023]
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Saunders AM, DeRose VJ. Beyond Mg 2+: functional interactions between RNA and transition metals. Curr Opin Chem Biol 2016; 34:152-158. [PMID: 27616014 DOI: 10.1016/j.cbpa.2016.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
It is well-known that RNA structure and function depend heavily on cations, and the ability of Mg2+ to stabilize RNA structures has been emphasized. Recent studies, however, highlight the importance of transition metals in RNA function. Riboswitches that selectively bind Ni2+, Co2+, and Mn2+ have been discovered with specific RNA-metal sites that influence metal-related gene expression. Exogenous metals such as Pt(II) from therapeutics also bind and may inhibit cellular RNA function. Novel reports that RNA can host Fe(II) in catalytic sites are relevant to early life in pre-oxygenic atmospheres. These new observations emphasize the importance of transition metals in the field of RNA metallobiochemistry.
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Affiliation(s)
- Adam M Saunders
- Department of Chemistry and Biochemistry, Institute of Molecular Biology, University of Oregon Eugene, OR 97403, United States
| | - Victoria J DeRose
- Department of Chemistry and Biochemistry, Institute of Molecular Biology, University of Oregon Eugene, OR 97403, United States.
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12
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Alshiekh A, Clausén M, Elmroth SKC. Kinetics of cisplatin binding to short r(GG) containing miRNA mimics - influence of Na(+)versus K(+), temperature and hydrophobicity on reactivity. Dalton Trans 2016; 44:12623-32. [PMID: 26079627 DOI: 10.1039/c5dt00663e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleic acids are well recognized targets for platinum-based anticancer drugs, with RNA and DNA being kinetically comparable. In the case of RNA, previous studies have shown that the reaction between small duplex RNAs (dsRNAs) and monoaquated cisplatin (cis-Pt(NH3)2Cl(OH2)(+), ) can be followed by the metal induced hyperchromicity occurring directly after addition of to e.g. microRNA mimics. In the present study, we have used this approach to compare thermal stability and reactivity between intracellularly- and extracellularly relevant salt concentration (CNa(+) and CK(+)ca. 0.1 M), and also as a function of increased hydrophobicity (10% v/v EtOH). In addition, reactivity was studied as a function of temperature in the interval ca. 5-20 °C below the respective dsRNA melting temperatures (Tms). Four different 13- to 20-mer dsRNAs with two different central sequence motifs were used as targets containing either a central r(GG)·r(CC)- or r(GG)·r(UAU)-sequence. The reactions exhibited half-lives in the minute- to hour range at 38 °C in the presence of excess in the μM range. Further, a linear dependence was found between C and the observed pseudo-first-order rate constants. The resulting apparent second-order rate constants were significantly larger for the lower melting r(GG)·r(UAU)-containing sequences compared with that of the fully complementary ones; the higher and lower reactivities represented by RNA-1-3 and RNA-1-1 with k2,appca. 30 and 8 M(-1) s(-1) respectively at CNa(+) = 122 mM. For all RNAs a common small, but significant, trend was observed with increased reactivity in the presence of K(+) compared with Na(+), and decreased reactivity in the presence of EtOH. Finally, the temperature dependence of k2,app was evaluated using the Eyring equation. The retrieved activation parameters reveal positive values for both ΔH(≠) and ΔS(≠) for all dsRNAs, in the range ca. 23-34 kcal mol(-1) and 22-57 cal K(-1) mol(-1) respectively. These values indicate solvational effects to be important for the rate determining step of the reaction, and thus in support of a structural change of the dsRNA to take place in parallel with the adduct formation step.
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Affiliation(s)
- Alak Alshiekh
- Biochemistry and Structural Biology, KILU, Lund University, PO Box 124, SE-221 00 Lund, Sweden.
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13
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Melnikov SV, Söll D, Steitz TA, Polikanov YS. Insights into RNA binding by the anticancer drug cisplatin from the crystal structure of cisplatin-modified ribosome. Nucleic Acids Res 2016; 44:4978-87. [PMID: 27079977 PMCID: PMC4889946 DOI: 10.1093/nar/gkw246] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Cisplatin is a widely prescribed anticancer drug, which triggers cell death by covalent binding to a broad range of biological molecules. Among cisplatin targets, cellular RNAs remain the most poorly characterized molecules. Although cisplatin was shown to inactivate essential RNAs, including ribosomal, spliceosomal and telomeric RNAs, cisplatin binding sites in most RNA molecules are unknown, and therefore it remains challenging to study how modifications of RNA by cisplatin contributes to its toxicity. Here we report a 2.6Å-resolution X-ray structure of cisplatin-modified 70S ribosome, which describes cisplatin binding to the ribosome and provides the first nearly atomic model of cisplatin-RNA complex. We observe nine cisplatin molecules bound to the ribosome and reveal consensus structural features of the cisplatin-binding sites. Two of the cisplatin molecules modify conserved functional centers of the ribosome-the mRNA-channel and the GTPase center. In the mRNA-channel, cisplatin intercalates between the ribosome and the messenger RNA, suggesting that the observed inhibition of protein synthesis by cisplatin is caused by impaired mRNA-translocation. Our structure provides an insight into RNA targeting and inhibition by cisplatin, which can help predict cisplatin-binding sites in other cellular RNAs and design studies to elucidate a link between RNA modifications by cisplatin and cisplatin toxicity.
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Affiliation(s)
- Sergey V Melnikov
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Dieter Söll
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA Department of Chemistry, Yale University, New Haven, CT 06520, USA
| | - Thomas A Steitz
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA Department of Chemistry, Yale University, New Haven, CT 06520, USA Howard Hughes Medical Institute at Yale University, New Haven, CT 06520, USA
| | - Yury S Polikanov
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60607, USA
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Saunders AM, DeRose VJ. Beyond Mg(2+): functional interactions between RNA and transition metals. Curr Opin Chem Biol 2016; 31:153-9. [PMID: 27031926 DOI: 10.1016/j.cbpa.2016.02.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 02/25/2016] [Indexed: 12/19/2022]
Abstract
It is well-known that RNA structure and function depend heavily on cations, and the ability of Mg(2+) to stabilize RNA structures has been emphasized. Recent studies, however, highlight the importance of transition metals in RNA function. Riboswitches that selectively bind Ni(2+), Co(2+), and Mn(2+) have been discovered with specific RNA-metal sites that influence metal-related gene expression. Exogenous metals such as Pt(II) from therapeutics also bind and may inhibit cellular RNA. Novel reports that RNA can host Fe(II) in catalytic sites are relevant to early life in pre-oxygenic atmospheres. These new observations emphasize the importance of transition metals in the field of RNA metallobiochemistry.
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Affiliation(s)
- Adam M Saunders
- Department of Chemistry and Biochemistry, Institute of Molecular Biology, University of Oregon Eugene, OR 97403, United States
| | - Victoria J DeRose
- Department of Chemistry and Biochemistry, Institute of Molecular Biology, University of Oregon Eugene, OR 97403, United States.
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15
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Polonyi C, Elmroth SKC. Time dependence of cisplatin-induced duplex dissociation of 15-mer RNAs and mature miR-146a. Dalton Trans 2013; 42:14959-62. [DOI: 10.1039/c3dt51788h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Hostetter AA, Osborn MF, DeRose VJ. RNA-Pt adducts following cisplatin treatment of Saccharomyces cerevisiae. ACS Chem Biol 2012; 7:218-25. [PMID: 22004017 DOI: 10.1021/cb200279p] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The numerous regulatory roles of cellular RNAs suggest novel potential drug targets, but establishing intracellular drug-RNA interactions is challenging. Cisplatin (cis-diamminedichloridoplatinum(II)) is a leading anticancer drug that forms exchange-inert complexes with nucleic acids, allowing its distribution on cellular RNAs to be followed ex vivo. Although Pt adduct formation on DNA is well-known, a complete characterization of cellular RNA-Pt adducts has not been performed. In this study, the action of cisplatin on S. cerevisiae in minimal media was established with growth curves, clonogenic assays, and tests for apoptotic markers. Despite high toxicity, cisplatin-induced apoptosis in S. cerevisiae was not observed under these conditions. In-cell Pt concentrations and Pt accumulation on poly(A)-mRNA, rRNA, total RNA, and DNA quantified via ICP-MS indicate ∼4- to 20-fold more Pt accumulation in total cellular RNA than in DNA. Interestingly, similar Pt accumulation is observed on rRNA and total RNA, corresponding to one Pt per (14,600 ± 1,500) and (5760 ± 580) nucleotides on total RNA following 100 and 200 μM cisplatin treatments, respectively. Specific Pt adducts mapped by primer extension analysis of a solvent-accessible 18S rRNA helix occur at terminal and internal loop regions and appear as soon as 1 h post-treatment. Pt per nucleotide accumulation on poly(A)-mRNA is 4- to 6-fold lower than on rRNA but could have consequences for low copy-number or highly regulated transcripts. Taken together, these data demonstrate significant accumulation of Pt adducts on cellular RNA species following in cellulo cisplatin treatment. These and other small molecule-RNA interactions could disrupt processes regulated by RNA.
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Affiliation(s)
- Alethia A. Hostetter
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Maire F. Osborn
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Victoria J. DeRose
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403, United States
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