Absorption of Low-Energy UV Radiation by Human Telomere G-Quadruplexes Generates Long-Lived Guanine Radical Cations
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Absorption of Low-Energy UV Radiation by Human Telomere G-Quadruplexes Generates Long-Lived Guanine Radical Cations (27 visite)

Banyasz A, Martinez-fernandez L, Balty C, Perron M, Douki T, Improta R, Markovitsi D

J Am Chem Soc (ISSN: 1520-5126electronic, 0002-7863linking), 2017 Aug 2; 139(30): 10561-10568.

Tipo di articolo: Journal Article

Impact factor: 9.023

Impact factor a 5 anni: 8.981


Parole chiave: Non disponibili.

Url: Non disponibile.

Telomeres, which are involved in cell division, carcinogenesis, and aging and constitute important therapeutic targets, are prone to oxidative damage. This propensity has been correlated with the presence of guanine-rich sequences, capable of forming four-stranded DNA structures (G-quadruplexes). Here, we present the first study on oxidative damage of human telomere G-quadruplexes without mediation of external molecules. Our investigation has been performed for G-quadruplexes formed by folding of GGG(TTAGGG)3 single strands in buffered solutions containing Na(+) cations (TEL21/Na(+)). Associating nanosecond time-resolved spectroscopy and quantum mechanical calculations (TD-DFT), it focuses on the primary species, ejected electrons and guanine radicals, generated upon absorption of UV radiation directly by TEL21/Na(+). We show that, at 266 nm, corresponding to an energy significantly lower than the guanine ionization potential, the one-photon ionization quantum yield is 4.5 x 10(-3). This value is comparable to that of cyclobutane thymine dimers (the major UV-induced lesions) in genomic DNA; the quantum yield of these dimers in TEL21/Na(+) is found to be (1.1 +/- 0.1) x 10(-3). The fate of guanine radicals, generated in equivalent concentration with that of ejected electrons, is followed over 5 orders of magnitude of time. Such a quantitative approach reveals that an important part of radical cation population survives up to a few milliseconds, whereas radical cations produced by chemical oxidants in various DNA systems are known to deprotonate, at most, within a few microseconds. Under the same experimental conditions, neither one-photon ionization nor long-lived radical cations are detected for the telomere repeat TTAGGG in single-stranded configuration, showing that secondary structure plays a key role in these processes. Finally, two types of deprotonated radicals are identified: on the one hand, (G-H2)(*) radicals, stable at early times, and on the other hand, (G-H1)(*) radicals, appearing within a few milliseconds and decaying with a time constant of approximately 50 ms.
*** IBB - CNR ***

LIDYL, CEA, CNRS, Universite Paris-Saclay , F-91191 Gif-sur-Yvette, France., Istituto Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche , Via Mezzocannone 16, I-80134 Napoli, Italy., CEA, INAC-SyMMES Laboratoire des Lesions des Acides Nucleiques, F-38000 Grenoble, France.,
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* Dosimetric predictors of asymptomatic heart valvular dysfunction following mediastinal irradiation for Hodgkin's lymphoma (97 visite)
Cella L, Liuzzi R, Conson M, Torre G, Caterino M, De Rosa N, Picardi M, Camera L, Solla R, Farella A, Salvatore M, Pacelli R
Radiotherapy And Oncology (ISSN: 0167-8140, 1879-0887, 1879-0887electronic), 2011 Nov; 101(2): 316-321.
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* Imaging of the striatal and extrastriatal dopamine transporter with 18F-LBT-999: Quantification, biodistribution, and radiation dosimetry in nonhuman primates (178 visite)
Varrone A, Stepanov V, Nakao R, Toth M, Gulyas B, Emond P, Deloye JB, Vercouillie J, Stabin MG, Jonsson C, Guilloteau D, Halldin C
Journal Of Nuclear Medicine (ISSN: 0161-5505, 1535-5667, 1535-5667electronic), 2011 Sep 1; 52(8): 1313-1321.
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* Asymptomatic Heart Disease After Mediastinal Irradiation In Hodgkin'S Lymphoma: Preliminary Findings (65 visite)
Torre G, Conson M, Liuzzi R, Caterino M, De Rosa N, Picardi M, Camera L, Solla R, Farella A, Salvatore M, Pacelli R, Cella L
Radiotherapy And Oncology (ISSN: 0167-8140, 1879-0887, 1879-0887electronic), 2011; 99: s424-s424.
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* Fractionated stereotactic radiation therapy for orbital optic nerve sheath meningioma - a single institution experience and a short review of the literature (69 visite)
Pacelli R, Cella L, Conson M, Tranfa F, Strianese D, Liuzzi R, Solla R, Farella A, Salvatore M, Bonavolonta G
J Rad Res Journal Of Radiation Research (ISSN: 1349-9157electronic, 0449-3060linking), 2011; 52(1): 82-87.
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* UV-Visible Absorption and Emission Energies in Condensed Phase by PCM/TD-DFT Methods (59 visite)
Improta R
Comput Strateg For Spectrosc (ISSN: 9780-4704), 2011; N/D: 37-75.
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* Weekly Chemotherapy with Cisplatin and Paclitaxel and Concurrent Radiation Therapy as Preoperative Treatment in Locally Advanced Esophageal Cancer: A Phase II Study (75 visite)
Orditura M, Galizia G, Napolitano V, Martinelli E, Pacelli R, Lieto E, Aurilio G, Vecchione L, Morgillo F, Catalano G, Ciardiello F, Del Genio A, Di Martino N, De Vita F
Cancer Investigation (ISSN: 0735-7907), 2010 Oct; 28(8): 820-827.
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DNA/RNA: Building blocks of life under UV irradiation (66 visite)
Gustavsson T, Improta R, Markovitsi D
J Phys Chem Lett (ISSN: 1948-7185, 1948-7185electronic, 1948-7185linking), 2010 Jul 1; 1(13): 2025-2030.
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* Time-Dependent and Time-Independent Approaches for the Computation of Absorption Spectra of Uracil Derivatives in Solution (65 visite)
Improta R, Lami A, Barone V SF
International Journal Of Quantum Chemistry (ISSN: 0020-7608), 2010 Mar 5; 110(3): 624-636.
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* Fractionated stereotactic radiation therapy for optic nerve shaeth meningioma: reporton 5 cases (60 visite)
Pacelli R, Tranfa F, Strianese D, Nieddu V, Baronissi I, Solla R, Farella A, Cella L, Liuzzi R, Punzo G, Salvatore M, Bonovolontà G
Radiotherapy And Oncology (ISSN: 0167-8140, 1879-0887, 1879-0887electronic), 2010; 96: N/D-N/D.
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* Radiation Induced Thyroid Disorders After Radiotherapy For Hodgkin S Disease: A Dosimetric Analysis (88 visite)
Cella L, Conson M, Liuzzi R, Caterino M, De Rosa N, Picardi M, Grimaldi F, Solla R, Farella A, Salvatore M, Pacelli R
Radiotherapy And Oncology (ISSN: 0167-8140, 1879-0887, 1879-0887electronic), 2010; 96: N/D-N/D.
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* STUDY OF THE RADICAL SPECIES INDUCED BY ELECTRON-BEAM IRRADIATION IN VACUUM ON BIOMEDICAL UHMWPE (63 visite)
Visco AM, Campo N, Vagliasindi LI, Tabbì G
International Journal Of Polymer Analysis And Characterization (ISSN: 1023-666x), 2010; 15(7): 424-437.
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* Radiation therapy in primary orbital lymphoma: A single institution retrospective analysis (95 visite)
De Cicco L, Cella L, Liuzzi R, Solla R, Farella A, Punzo G, Tranfa F, Strianese D, Conson M, Bonavolontà G, Salvatore M, Pacelli R
Radiat Oncol Radiation Oncology (ISSN: 1748-717x), 2009 Dec 7; 4(1): 60-60.
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* Preoperative Radiation Treatment for Rectal Cancer: Comparison of Target Coverage and Small Bowel NTCP in Conventional vs. 3D-Conformal Planning (114 visite)
Cella L, Ciscognetti N, Martin G, Liuzzi R, Punzo G, Solla R, Farella A, Salvatore M, Pacelli R
Med Dosim Medical Dosimetry (ISSN: 0958-3947, 1873-4022), 2009 Mar; 34(1): 75-81.
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* Photoinduced dynamics of guanosine monophosphate in water from broad-band transient absorption spectroscopy and quantum-chemical calculations (70 visite)
Karunakaran V, Kleinermanns K, Improta R, Kovalenko SA
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2009; 131(16): 5839-5850.
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* Exposure to 900 MHz radiofrequency radiation induces caspase 3 activation in proliferating human lymphocytes (59 visite)
Palumbo R, Brescia F, Capasso D, Sannino A, Sarti M, Capri M, Grassilli E, Scarfì MR
Radiat Res (ISSN: 0033-7587), 2008 Sep; 170(3): 327-334.
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* Biodistribution and radiation dosimetry of the norepinephrine transporter radioligand (S, S)-[18F]FMeNER-D2: A human whole-body PET study (72 visite)
Takano A, Halldin C, Varrone A, Karlsson P, Sjoholm N, Stubbs JB, Schou M, Airaksinen AJ, Tauscher J, Gulyas B
Eur J Nucl Med Mol Imaging (ISSN: 1619-7070, 1619-7089, 0340-6997), 2008 Mar; 35(3): 630-636.
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* Inhibition of poly (ADP-Ribose) polymerase synergizes with the DNA-topoisomerase-1-inhibitor, topotecan, and radiation in human glioblastoma cell lines (61 visite)
Sabbatino F, Pacelli R, Punzo G, Fusciello C, Vernieri C, Della Vittoria Scarpati G, Pepe S
Cytometry Part A (ISSN: 1552-4922), 2008 Jan; 73A(1): N/D-N/D.
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* Absorption flattening as one cause of distortion of circular dichroism spectra of Δ-RuPhen3·H2TPPS complex (97 visite)
Castiglioni E, Abbate S, Longhi G, Gangemi R, Lauceri R, Purrello R
Chirality (ISSN: 0899-0042), 2007 Sep; 19(8): 642-646.
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* Randomized comparison of consolidation radiation versus observation in bulky Hodgkin's lymphoma with post-chemotherapy negative positron emission tomography scans (102 visite)
Picardi M, De Renzo A, Pane F, Nicolai E, Pacelli R, Salvatore M, Rotoli B
Leuk Lymphoma (ISSN: 1042-8194), 2007 Sep; 48(9): 1721-1727.
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* Solvent effects on the steady-state absorption and fluorescence spectra of uracil, thymine and 5-fluorouracil (70 visite)
Gustavsson T, Sarkar N, Banyasz A, Markovitsi D, Improta R
Photochem Photobiol (ISSN: 0031-8655), 2007 May; 83(3): 595-599.
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* Ab initio calculations of absorption spectra of large molecules in solution: Coumarin C153 (75 visite)
Improta R, Barone V, Santoro F
Angew Chem Int Ed (ISSN: 1433-7851, 1521-3773electronic), 2007; 46(3): 405-408.
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* Effectivenes And Toxicity Of Perioperative Radiation Therapy In Rectal Cancer: Report On 123 Consecutive Cases Of A Single Institution Experience (68 visite)
De Cicco L, Argenone A, Ciscognetti N, Solla R, Farella A, Gaetano M, Punzo G, Cella L, Totaro G, Di Stazio F, Liuzzi R, Pacelli R, Salvatore M
Igrt - Orbi Posters, 2006 Oct; 0: 0-0.
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* Preoperative radiation treatment for rectal cancer: Comparison of target coverage and small bowel NTCP in conventional versus 3D-conformal planning (70 visite)
Cella L, Punzo G, Martin G, Ciscognetti N, Liuzzi R, Solla R, Farella A, Salvatore M, Pacelli R
Radiotherapy And Oncology (ISSN: 0167-8140, 1879-0887, 1879-0887electronic), 2006 Oct; 81: N/D-N/D.
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* Inhibition of NF-kappa B activity potentiates ionizing radiation and cisplatin induced cell killing of anaplastic thyroid carcinoma cells (72 visite)
Iommelli F, Zannetti A, Pepe S, Sabbatino F, Laus G, Ghidelli L, Solla R, Scala S, Del Vecchio S, Salvatore M, Pacelli R
Meetingproceedings Of The American Association For Cancer Research Annual (ISSN: 0197-016x), 2006 Apr; 47: N/D-N/D.
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* Absorption and fluorescence spectra of uracil in the gas phase and in aqueous solution: A TD-DFT quantum mechanical study (142 visite)
Improta R, Barone V
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2004 Nov 10; 126(44): 14320-14321.
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* Radiation protection of salivary glands in patients undergoing therapy with high doses of 131-Iodine (59 visite)
Soricelli A, Klain M, Golia R, Storto G, Venetucci A, Bracigliano A, Paone G, Pace L, Salvatore M
Eur J Nucl Med Mol Imaging (ISSN: 1619-7070, 1619-7089, 0340-6997), 2004 Sep; 31: N/D-N/D.
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* Lymph nodes in the irradiated field influence the yield of radiation-induced chromosomal aberrations in lymphocytes from breast cancer patients (106 visite)
d'Alesio V, Pacelli R, Durante M, Canale Cama G, Cella L, Gialanella G, Grossi G, Pugliese M, Punzo G, Sardi I, Scampoli P, Solla R, Salvatore M
Int J Radiat Oncol Biol Phys (ISSN: 0360-3016, 1879-355x, 1879-355xelectronic), 2003 Nov 1; 57(3): 732-738.
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* ONYX-015 Enhances Radiation-Induced Death of Human Anaplastic Thyroid Carcinoma Cells (106 visite)
Portella G, Pacelli R, Libertini S, Cella L, Vecchio G, Salvatore M, Fusco A
J Clin Endocrinol Metab Journal Of Clinical Endocrinology And Metabolism (ISSN: 0021-972x), 2003 Oct 1; 88(10): 5027-5032.
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* Potential reduction of the incidence of radiation-induced second cancers by using proton beams in the treatment of pediatric tumors (62 visite)
Miralbell R, Lomax A, Cella L, Schneider U
Int J Radiat Oncol Biol Phys (ISSN: 0360-3016, 1879-355x, 1879-355xelectronic), 2002 Nov 1; 54(3): 824-829.
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Principles of chemoradiation: Theoretical and practical considerations (68 visite)
Herscher LL, Cook JA, Pacelli R, Pass HI, Russo A, Mitchell JB
Oncology (ISSN: 0890-9091), 1999 Oct; 13(10SUPPL.5): 11-22.
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Effects of ionizing radiations on the activity of valyl tRNA synthetase isolated from rat liver and from Morris hepatoma 7777 (53 visite)
 Romano M, Cerra M, Salvatore M, Onorati A
Tumori (ISSN: 0300-8916, 0300-8916print), 1974 Jul; 60(4): 301-306.
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83 Records (65 escludendo Abstract e Conferenze).
Impact factor totale: 301.226 (250.221 escludendo Abstract e Conferenze).
Impact factor a 5 anni totale: 302.2 (248.322 escludendo Abstract e Conferenze).

Interrogazione bibliografica effettuata: (([btitle] "Absorption" OR [btitle] "Radiation" OR [btitle] "Telomere" OR [btitle] "Quadruplexes" OR [btitle] "Generates") AND NOT [id] = 53640)







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