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Lee JWL, Tikhonov DS, Chopra P, Maclot S, Steber AL, Gruet S, Allum F, Boll R, Cheng X, Düsterer S, Erk B, Garg D, He L, Heathcote D, Johny M, Kazemi MM, Köckert H, Lahl J, Lemmens AK, Loru D, Mason R, Müller E, Mullins T, Olshin P, Passow C, Peschel J, Ramm D, Rompotis D, Schirmel N, Trippel S, Wiese J, Ziaee F, Bari S, Burt M, Küpper J, Rijs AM, Rolles D, Techert S, Eng-Johnsson P, Brouard M, Vallance C, Manschwetus B, Schnell M. Time-resolved relaxation and fragmentation of polycyclic aromatic hydrocarbons investigated in the ultrafast XUV-IR regime. Nat Commun 2021; 12:6107. [PMID: 34671016 PMCID: PMC8528970 DOI: 10.1038/s41467-021-26193-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 09/17/2021] [Indexed: 11/18/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) play an important role in interstellar chemistry and are subject to high energy photons that can induce excitation, ionization, and fragmentation. Previous studies have demonstrated electronic relaxation of parent PAH monocations over 10-100 femtoseconds as a result of beyond-Born-Oppenheimer coupling between the electronic and nuclear dynamics. Here, we investigate three PAH molecules: fluorene, phenanthrene, and pyrene, using ultrafast XUV and IR laser pulses. Simultaneous measurements of the ion yields, ion momenta, and electron momenta as a function of laser pulse delay allow a detailed insight into the various molecular processes. We report relaxation times for the electronically excited PAH*, PAH+* and PAH2+* states, and show the time-dependent conversion between fragmentation pathways. Additionally, using recoil-frame covariance analysis between ion images, we demonstrate that the dissociation of the PAH2+ ions favors reaction pathways involving two-body breakup and/or loss of neutral fragments totaling an even number of carbon atoms.
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Affiliation(s)
- J. W. L. Lee
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - D. S. Tikhonov
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9764.c0000 0001 2153 9986Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - P. Chopra
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9764.c0000 0001 2153 9986Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - S. Maclot
- grid.4514.40000 0001 0930 2361Department of Physics, Lund University, Lund, Sweden ,grid.8761.80000 0000 9919 9582Physics Department, University of Gothenburg, Gothenburg, Sweden
| | - A. L. Steber
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9764.c0000 0001 2153 9986Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Kiel, Germany ,grid.9026.d0000 0001 2287 2617Center for Ultrafast Imaging, Universität Hamburg, Hamburg, Germany
| | - S. Gruet
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - F. Allum
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - R. Boll
- grid.434729.f0000 0004 0590 2900European XFEL, Schenefeld, Germany
| | - X. Cheng
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - S. Düsterer
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - B. Erk
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - D. Garg
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9026.d0000 0001 2287 2617Department of Physics, Universität Hamburg, Hamburg, Germany
| | - L. He
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - D. Heathcote
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - M. Johny
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - M. M. Kazemi
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - H. Köckert
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - J. Lahl
- grid.4514.40000 0001 0930 2361Department of Physics, Lund University, Lund, Sweden
| | - A. K. Lemmens
- grid.5590.90000000122931605Radboud University, FELIX Laboratory, Nijmegen, The Netherlands ,grid.7177.60000000084992262Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, The Netherlands
| | - D. Loru
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9764.c0000 0001 2153 9986Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - R. Mason
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - E. Müller
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - T. Mullins
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - P. Olshin
- grid.15447.330000 0001 2289 6897Saint Petersburg State University, Saint Petersburg, Russia
| | - C. Passow
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - J. Peschel
- grid.4514.40000 0001 0930 2361Department of Physics, Lund University, Lund, Sweden
| | - D. Ramm
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - D. Rompotis
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.434729.f0000 0004 0590 2900European XFEL, Schenefeld, Germany
| | - N. Schirmel
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - S. Trippel
- grid.9026.d0000 0001 2287 2617Center for Ultrafast Imaging, Universität Hamburg, Hamburg, Germany ,grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - J. Wiese
- grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9026.d0000 0001 2287 2617Department of Chemistry, Universität Hamburg, Hamburg, Germany
| | - F. Ziaee
- grid.36567.310000 0001 0737 1259J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS USA
| | - S. Bari
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - M. Burt
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - J. Küpper
- grid.9026.d0000 0001 2287 2617Center for Ultrafast Imaging, Universität Hamburg, Hamburg, Germany ,grid.9026.d0000 0001 2287 2617Department of Physics, Universität Hamburg, Hamburg, Germany ,grid.7683.a0000 0004 0492 0453Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9026.d0000 0001 2287 2617Department of Chemistry, Universität Hamburg, Hamburg, Germany
| | - A. M. Rijs
- grid.5590.90000000122931605Radboud University, FELIX Laboratory, Nijmegen, The Netherlands ,grid.12380.380000 0004 1754 9227Division of BioAnalytical Chemistry, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - D. Rolles
- grid.36567.310000 0001 0737 1259J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS USA
| | - S. Techert
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.7450.60000 0001 2364 4210Institute for X-Ray Physics, Georg-August-Universität, Göttingen, Germany
| | - P. Eng-Johnsson
- grid.4514.40000 0001 0930 2361Department of Physics, Lund University, Lund, Sweden
| | - M. Brouard
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - C. Vallance
- grid.4991.50000 0004 1936 8948The Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - B. Manschwetus
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - M. Schnell
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany ,grid.9764.c0000 0001 2153 9986Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
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Foote KM, Nissink JWM, McGuire T, Turner P, Guichard S, Yates JWT, Lau A, Blades K, Heathcote D, Odedra R, Wilkinson G, Wilson Z, Wood CM, Jewsbury PJ. Discovery and Characterization of AZD6738, a Potent Inhibitor of Ataxia Telangiectasia Mutated and Rad3 Related (ATR) Kinase with Application as an Anticancer Agent. J Med Chem 2018; 61:9889-9907. [PMID: 30346772 DOI: 10.1021/acs.jmedchem.8b01187] [Citation(s) in RCA: 169] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The kinase ataxia telangiectasia mutated and rad3 related (ATR) is a key regulator of the DNA-damage response and the apical kinase which orchestrates the cellular processes that repair stalled replication forks (replication stress) and associated DNA double-strand breaks. Inhibition of repair pathways mediated by ATR in a context where alternative pathways are less active is expected to aid clinical response by increasing replication stress. Here we describe the development of the clinical candidate 2 (AZD6738), a potent and selective sulfoximine morpholinopyrimidine ATR inhibitor with excellent preclinical physicochemical and pharmacokinetic (PK) characteristics. Compound 2 was developed improving aqueous solubility and eliminating CYP3A4 time-dependent inhibition starting from the earlier described inhibitor 1 (AZ20). The clinical candidate 2 has favorable human PK suitable for once or twice daily dosing and achieves biologically effective exposure at moderate doses. Compound 2 is currently being tested in multiple phase I/II trials as an anticancer agent.
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Affiliation(s)
- Kevin M Foote
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - J Willem M Nissink
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Thomas McGuire
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Paul Turner
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Sylvie Guichard
- Bioscience, Oncology, IMED Biotech Unit , AstraZeneca , Chesterford Research Park , Little Chesterford, Cambridge CB10 1XL , U.K
| | - James W T Yates
- DMPK, Oncology, IMED Biotech Unit , AstraZeneca , Chesterford Research Park , Little Chesterford, Cambridge CB10 1XL , U.K
| | - Alan Lau
- Bioscience, Oncology, IMED Biotech Unit , AstraZeneca , Chesterford Research Park , Little Chesterford, Cambridge CB10 1XL , U.K
| | - Kevin Blades
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Dan Heathcote
- Discovery Sciences, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Rajesh Odedra
- Bioscience, Oncology, IMED Biotech Unit , AstraZeneca , Chesterford Research Park , Little Chesterford, Cambridge CB10 1XL , U.K
| | - Gary Wilkinson
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Zena Wilson
- Bioscience, Oncology, IMED Biotech Unit , AstraZeneca , Chesterford Research Park , Little Chesterford, Cambridge CB10 1XL , U.K
| | - Christine M Wood
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
| | - Philip J Jewsbury
- Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , Cambridge Science Park, 310 Milton Road , Milton, Cambridge CB4 0WG , U.K
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5
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Redfern WS, Storey S, Tse K, Hussain Q, Maung KP, Valentin JP, Ahmed G, Bigley A, Heathcote D, McKay JS. Evaluation of a convenient method of assessing rodent visual function in safety pharmacology studies: effects of sodium iodate on visual acuity and retinal morphology in albino and pigmented rats and mice. J Pharmacol Toxicol Methods 2010; 63:102-14. [PMID: 20619348 DOI: 10.1016/j.vascn.2010.06.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2009] [Revised: 06/04/2010] [Accepted: 06/29/2010] [Indexed: 11/13/2022]
Abstract
INTRODUCTION We have evaluated the ability of a semi-automated, optomotor reflex method to assess drug-induced visual dysfunction, in albino and pigmented rats and mice. METHODS Male Han Wistar (HW) and Long Evans (LE) rats and mice (CD-1 and C57BL/6) were tested in a chamber formed by 4 computer monitors displaying a rotating vertical grating, to elicit head-tracking movements. The highest visible grating frequency was taken as the threshold of visual acuity, in cycles per degree (c/d). Animals received an intravenous infusion of either sodium iodate (50mg/kg) or 0.9% w/v NaCl (aq). They were tested 2h later, then re-tested daily for a further 3 days. The time course of the effect was assessed in HW rats over a 6-week period, including electron microscopy, and immunohistochemical analysis of markers of injury and repair in the retina. RESULTS Baseline visual acuities for HW and LE rats were 0.355 ± 0.007 and 0.530 ± 0.004 c/d, respectively, and 0.296 ± 0.003 c/d and 0.370 ± 0.001 c/d for CD-1 and C57BL/6 mice, respectively (n=10 for each). In HW rats there was a dramatic loss of visual acuity 2h after administration of sodium iodate (0.021 ± 0.021 c/d; P<0.001). Less dramatic decreases in visual acuity were seen in LE rats and in the two mouse strains. In HW rats, visual acuity was restored after 4 weeks. This paralleled the histopathological recovery of the peripheral retina, whereas the central retina did not recover. DISCUSSION The method proved to be very convenient, and the stability of visual acuity in vehicle control rats over a 6-week period also demonstrated its suitability for inclusion in long-term toxicity studies. Both albino and pigmented mice and rats are suitable for assessment of retinotoxicity using this method, but albino rats are the most sensitive to sodium iodate.
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Affiliation(s)
- William S Redfern
- Safety Pharmacology Departmen, Safety Assessment UK, AstraZeneca R&D, Alderley Park, Cheshire SK10 4TG, United Kingdom.
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7
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Abstract
BACKGROUND There is a need to identify effective and safe treatments for depression in children and adolescents. While tricyclic drugs are effective in treating depression in adults, individual studies involving children and adolescents have been equivocal. OBJECTIVES To assess the effects of oral tricyclic antidepressants compared to placebo in the treatment of child and adolescent depression. SEARCH STRATEGY We searched MEDLINE (1966-1997), EMBASE, Excerpta Medica (June 1974-1997), the Cochrane Collaboration Depression, Anxiety and Neurosis Group trials register (most recent search 25/1/2000) and bibliographies of previously published reviews and papers describing original research were cross-checked. Current Contents was screened for recent publications. We contacted authors of relevant abstracts in conference proceedings of the American Academy of Child and Adolescent Psychiatry, and we hand searched the Journal of the American Academy of Child and Adolescent Psychiatry (1978-1999). SELECTION CRITERIA Randomised controlled trials comparing the efficacy of orally administered tricyclic medication with placebo in depressed people aged 6-18 years. DATA COLLECTION AND ANALYSIS Most studies reported multiple outcome measures including depression scales and clinical global impression scales. For each study the best available depression measure was taken as the index measure of depression outcome. Predetermined criteria were established to assist in the ranking of measures. Where authors reported categorical outcomes we calculated individual and pooled odds ratios for the odds of improvement in treated compared with control subjects. For continuous outcomes pooled effect sizes were calculated as the number of standard deviations by which the change in depression scores for the treatment group exceeded those for the control groups. MAIN RESULTS Thirteen trials (involving 506 participants) were included. No overall improvement with treatment compared to placebo was seen for children or adolescents (odds ratio = 0.84, 95% confidence interval 0.56 to 1.25). A statistically significant but small benefit of treatment over placebo was seen in reducing symptoms (effect size (standardised mean difference) = -0.31, 95% confidence interval -0.62 to -0.01). Subgroup analyses suggest a larger benefit among adolescents (effect size = -0.47, 95% confidence interval -0.92 to -0.02), and no benefit among children (effect size = 0.15, 95% confidence interval -0.34 to 0.64). Treatment with a tricyclic antidepressant caused more vertigo (odds ratio = 4.38, 95% confidence interval 2.33 to 8.25), orthostatic hypotension (odds ratio = 6.78, 95% confidence interval 2.06 to 22.26), tremor (odds ratio 6.29, 95% confidence interval 1.78 to 22.17) and dry mouth (odds ratio = 5.17, 95% confidence interval 2.68 to 29.99) than did placebo, but no statistically significant difference was found for other possible adverse effects. REVIEWER'S CONCLUSIONS Data suggest tricyclic antidepressants are not useful in treating depression in pre pubertal children. There is marginal evidence to support the use of tricyclic antidepressants in the treatment of depression in adolescents, although the magnitude of effect is likely to be moderate at best.
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Affiliation(s)
- P Hazell
- Child and Youth Mental Health Service, Hunter Mental Health Service, Wallsend Hospital, Wallsend Hospital, Locked Bag 1014, Wallsend, New South Wales, Australia, 2287.
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