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Asby DJ, Radigois MG, Wilson DC, Cuda F, Chai CLL, Chen A, Bienemann AS, Light ME, Harrowven DC, Tavassoli A. Triggering apoptosis in cancer cells with an analogue of cribrostatin 6 that elevates intracellular ROS. Org Biomol Chem 2018; 14:9322-9330. [PMID: 27722456 DOI: 10.1039/c6ob01591c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elevation of reactive oxygen species (ROS) is both a consequence and driver of the upregulated metabolism and proliferation of transformed cells. The resulting increase in oxidative stress is postulated to saturate the cellular antioxidant machinery, leaving cancer cells susceptible to agents that further elevate their intracellular oxidative stress. Several small molecules, including the marine natural product cribrostatin 6, have been demonstrated to trigger apoptosis in cancer cells by increasing intracellular ROS. Here, we report the modular synthesis of a series of cribrostatin 6 derivatives, and assessment of their activity in a number of cell lines. We establish that placing a phenyl ring on carbon 8 of cribrostatin 6 leads to increased potency, and observe a window of selectivity towards cancer cells. The mechanism of activity of this more potent analogue is assessed and demonstrated to induce apoptosis in cancer cells by increasing ROS. Our results demonstrate the potential for targeting tumors with molecules that enhance intracellular oxidative stress.
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Affiliation(s)
- D J Asby
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - M G Radigois
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK. and Institute of Chemical and Engineering Sciences, A*Star, 138665, Singapore
| | - D C Wilson
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - F Cuda
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - C L L Chai
- Institute of Chemical and Engineering Sciences, A*Star, 138665, Singapore and Department of Pharmacy, National University of Singapore, 117543, Singapore
| | - A Chen
- Institute of Chemical and Engineering Sciences, A*Star, 138665, Singapore
| | - A S Bienemann
- School of Clinical Sciences, University of Bristol, Southmead Hospital, Bristol, BS10 5NB, UK
| | - M E Light
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - D C Harrowven
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - A Tavassoli
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK. and The Institute for Life Sciences, University of Southampton, Southampton, UK
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Asby DJ, Cuda F, Hoakwie F, Miranda E, Tavassoli A. HIF-1 promotes the expression of its α-subunit via an epigenetically regulated transactivation loop. ACTA ACUST UNITED AC 2014; 10:2505-8. [DOI: 10.1039/c4mb00351a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A HIF-1 protein–protein interaction inhibitor is used to establish the presence of a HIF-1α transactivation loop in hypoxia.
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Affiliation(s)
- D. J. Asby
- Chemistry
- University of Southampton
- Southampton, UK
| | - F. Cuda
- Chemistry
- University of Southampton
- Southampton, UK
| | - F. Hoakwie
- Chemistry
- University of Southampton
- Southampton, UK
| | - E. Miranda
- Chemistry
- University of Southampton
- Southampton, UK
| | - A. Tavassoli
- Chemistry
- University of Southampton
- Southampton, UK
- Cancer Sciences
- Faculty of Medicine
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Thomson HA, Treharne AJ, Backholer LS, Cuda F, Grossel MC, Lotery AJ. Biodegradable poly(α-hydroxy ester) blended microspheres as suitable carriers for retinal pigment epithelium cell transplantation. J Biomed Mater Res A 2010; 95:1233-43. [DOI: 10.1002/jbm.a.32940] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Revised: 07/02/2010] [Accepted: 07/08/2010] [Indexed: 11/06/2022]
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Mamone S, Ge M, Hüvonen D, Nagel U, Danquigny A, Cuda F, Grossel MC, Murata Y, Komatsu K, Levitt MH, Rõõm T, Carravetta M. Rotor in a cage: Infrared spectroscopy of an endohedral hydrogen-fullerene complex. J Chem Phys 2009; 130:081103. [DOI: 10.1063/1.3080163] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Horsewill AJ, Panesar KS, Rols S, Johnson MR, Murata Y, Komatsu K, Mamone S, Danquigny A, Cuda F, Maltsev S, Grossel MC, Carravetta M, Levitt MH. Quantum translator-rotator: inelastic neutron scattering of dihydrogen molecules trapped inside anisotropic fullerene cages. Phys Rev Lett 2009; 102:013001. [PMID: 19257185 DOI: 10.1103/physrevlett.102.013001] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Indexed: 05/27/2023]
Abstract
We report an inelastic neutron scattering investigation of the quantum dynamics of hydrogen molecules trapped inside anisotropic fullerene cages. Transitions among the manifold of quantized rotational and translational states are directly observed. The spectra recorded as a function of energy and momentum transfer are interpreted in terms of the rotational potential and the cage dimensions. The thermodynamics of orthohydrogen and parahydrogen are investigated through temperature dependence measurements.
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Affiliation(s)
- A J Horsewill
- School of Physics & Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
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Panesar KS, Horsewill AJ, Cuda F, Carravetta M, Mamone S, Danquigny A, Grossel MC, Levitt MH. Thermal history effects and methyl tunneling dynamics in a supramolecular complex of calixarene andpara-xylene. J Chem Phys 2008; 128:144512. [DOI: 10.1063/1.2889003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Di Pietro C, Piro S, Tabbì G, Ragusa M, Di Pietro V, Zimmitti V, Cuda F, Anello M, Consoli U, Salinaro ET, Caruso M, Vancheri C, Crimi N, Sabini MG, Cirrone GAP, Raffaele L, Privitera G, Pulvirenti A, Giugno R, Ferro A, Cuttone G, Lo Nigro S, Purrello R, Purrello F, Purrello M. Cellular and molecular effects of protons: apoptosis induction and potential implications for cancer therapy. Apoptosis 2007; 11:57-66. [PMID: 16374542 DOI: 10.1007/s10495-005-3346-1] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Due to their ballistic precision, apoptosis induction by protons could be a strategy to specifically eliminate neoplastic cells. To characterize the cellular and molecular effects of these hadrons, we performed dose-response and time-course experiments by exposing different cell lines (PC3, Ca301D, MCF7) to increasing doses of protons and examining them with FACS, RT-PCR, and electron spin resonance (ESR). Irradiation with a dose of 10 Gy of a 26,7 Mev proton beam altered cell structures such as membranes, caused DNA double strand breaks, and significantly increased intracellular levels of hydroxyl ions, are active oxygen species (ROS). This modified the transcriptome of irradiated cells, activated the mitochondrial (intrinsic) pathway of apoptosis, and resulted in cycle arrest at the G2/M boundary. The number of necrotic cells within the irradiated cell population did not significantly increase with respect to the controls. The effects of irradiation with 20 Gy were qualitatively as well as quantitatively similar, but exposure to 40 Gy caused massive necrosis. Similar experiments with photons demonstrated that they induce apoptosis in a significantly lower number of cells and in a temporally delayed manner. These data advance our knowledge on the cellular and molecular effects of proton irradiation and could be useful for improving current hadrontherapy protocols.
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Affiliation(s)
- C Di Pietro
- Dipartimento di Scienze Biomediche, Sezione di Biologia, Genetica e Bioinformatica, Università di Catania, Catania, 95123, Italy
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Carravetta M, Danquigny A, Mamone S, Cuda F, Johannessen OG, Heinmaa I, Panesar K, Stern R, Grossel MC, Horsewill AJ, Samoson A, Murata M, Murata Y, Komatsu K, Levitt MH. Solid-state NMR of endohedral hydrogen–fullerene complexes. Phys Chem Chem Phys 2007; 9:4879-94. [PMID: 17912417 DOI: 10.1039/b707075f] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present an overview of solid-state NMR studies of endohedral H(2)-fullerene complexes, including (1)H and (13)C NMR spectra, (1)H and (13)C spin relaxation studies, and the results of (1)H dipole-dipole recoupling experiments. The available data involves three different endohedral H(2)-fullerene complexes, studied over a wide range of temperatures and applied magnetic fields. The symmetry of the cage influences strongly the motionally-averaged nuclear spin interactions of the endohedral H(2) species, as well as its spin relaxation behaviour. In addition, the non-bonding interactions between fullerene cages are influenced by the presence of endohedral hydrogen molecules. The review also presents several pieces of experimental data which are not yet understood, one example being the structured (1)H NMR lineshapes of endohedral H(2) molecules trapped in highly symmetric cages at cryogenic temperatures. This review demonstrates the richness of NMR phenomena displayed by H(2)-fullerene complexes, especially in the cryogenic regime.
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Affiliation(s)
- M Carravetta
- School of Chemistry, University of Southampton, Southampton, UK.
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Rossi P, Dapporto P, Guerri A, Altamura M, Cuda F, Guidi A, Nativi C. o-Phthalic acid derivatives: a structural investigation of their flexibility. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304094656] [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: 04/03/2023] Open
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