26
|
Ipsen S, Bruder R, O'Brien R, Keall P, Schweikard A, Poulsen P. TH-AB-202-05: BEST IN PHYSICS (JOINT IMAGING-THERAPY): First Online Ultrasound-Guided MLC Tracking for Real-Time Motion Compensation in Radiotherapy. Med Phys 2016. [DOI: 10.1118/1.4958069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
27
|
Kim J, Nguyen D, Huang C, O'Brien R, Caillet V, Poulsen P, Booth J, Keall P. TH-AB-202-10: Quantifying the Accuracy and Precision of Six Degree-Of-Freedom Motion Estimation for Use in Real-Time Tumor Motion Monitoring During Radiotherapy. Med Phys 2016. [DOI: 10.1118/1.4958074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
28
|
Nguyen D, Kim J, O'Brien R, Huang C, Booth J, Greer P, Legge K, Poulsen P, Martin J, Keall P. TH-AB-202-12: The First Clinical Implementation of a Real-Time Six Degree of Freedom Tracking System During Radiation Therapy. Med Phys 2016. [DOI: 10.1118/1.4958076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
29
|
Caillet V, O'Brien R, Colvill E, Poulsen P, Moore D, Booth J, Sawant A, Keall P. SU-G-JeP1-12: Head-To-Head Performance Characterization of Two Multileaf Collimator Tracking Algorithms for Radiotherapy. Med Phys 2016. [DOI: 10.1118/1.4956987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
30
|
Feain I, Shieh C, White P, O'Brien R, Counter W, Jackson M, Downes S, Keall P. EP-1928: The Nano-X image-guided adaptive gantry-less linac: imaging and dosimetry under phantom rotation. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33179-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
31
|
Pollock S, Tse R, Martin D, McLean L, Pham M, Martin D, Tait D, Estoesta P, Whittington G, Turley J, Kearney C, Cho G, Hill R, Pickard S, Aston P, Makhija K, O'Brien R, Keall P. EP-1742: The first clinical implementation of audiovisual biofeedback in liver cancer SBRT. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32993-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
32
|
Williams KH, Sullivan DR, Veillard AS, O'Brien R, George J, Jenkins AJ, Young S, Ehnholm C, Duffield A, Twigg SM, Keech AC. Low alanine aminotransferase levels and higher number of cardiovascular events in people with Type 2 diabetes: analysis of the Fenofibrate Intervention and Event Lowering in Diabetes (FIELD) study. Diabet Med 2016; 33:356-64. [PMID: 26433207 DOI: 10.1111/dme.12972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/28/2015] [Indexed: 12/24/2022]
Abstract
AIMS To determine whether alanine aminotransferase or gamma-glutamyltransferase levels, as markers of liver health and non-alcoholic fatty liver disease, might predict cardiovascular events in people with Type 2 diabetes. METHODS Data from the Fenofibrate Intervention and Event Lowering in Diabetes study were analysed to examine the relationship between liver enzymes and incident cardiovascular events (non-fatal myocardial infarction, stroke, coronary and other cardiovascular death, coronary or carotid revascularization) over 5 years. RESULTS Alanine aminotransferase measure had a linear inverse relationship with the first cardiovascular event occurring in participants during the study period. After adjustment, for every 1 sd higher baseline alanine aminotransferase measure (13.2 U/l), the risk of a cardiovascular event was 7% lower (95% CI 4-13; P = 0.02). Participants with alanine aminotransferase levels below and above the reference range 8-41 U/l for women and 9-59 U/l for men, had hazard ratios for a cardiovascular event of 1.86 (95% CI 1.12-3.09) and 0.65 (95% CI 0.49-0.87), respectively (P = 0.001). No relationship was found for gamma-glutamyltransferase. CONCLUSIONS The data may indicate that in people with Type 2 diabetes, which is associated with higher alanine aminotransferase levels because of prevalent non-alcoholic fatty liver disease, a low alanine aminotransferase level is a marker of hepatic or systemic frailty rather than health.
Collapse
|
33
|
Mackintosh CG, Griffin JFT, Scott IC, O'Brien R, Stanton JL, MacLean P, Brauning R. SOLiD SAGE sequencing shows differential gene expression in jejunal lymph node samples of resistant and susceptible red deer (Cervus elaphus) challenged with Mycobacterium avium subsp. paratuberculosis. Vet Immunol Immunopathol 2016; 169:102-10. [PMID: 26620077 DOI: 10.1016/j.vetimm.2015.10.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 09/28/2015] [Accepted: 10/28/2015] [Indexed: 02/05/2023]
|
34
|
Wisotzky E, O'Brien R, Keall P. TH-AB-303-04: A Novel Leaf Sequencing Optimization Algorithm Which Considers Previous Underdose and Overdose Events for MLC Tracking Radiotherapy. Med Phys 2015. [DOI: 10.1118/1.4926159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
35
|
O'Brien R, Lyon J, Ng J, Bergman A, Booth J, Keall P. TH-CD-303-09: Respiratory Motion Guided 4DCBCT On a Linear Accelerator with Lung Cancer Patient Breathing Traces. Med Phys 2015. [DOI: 10.1118/1.4926244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
36
|
Booth J, Ng J, O'Brien R, Keall P, Poulsen P, Calliet V, Juneja P, Eade T, Kneebone A. TH-AB-303-09: Gated Prostate Radiotherapy: Accuracy and Dosimetric Results From First Clinical Study with Kilovoltage Intrafraction Monitoring. Med Phys 2015. [DOI: 10.1118/1.4926164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
37
|
Ge Y, Booth J, Colvill E, O'Brien R, Keall P. SU-E-J-57: First Development of Adapting to Intrafraction Relative Motion Between Prostate and Pelvic Lymph Nodes Targets. Med Phys 2015. [DOI: 10.1118/1.4924144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
38
|
Denholm JT, Amon JJ, O'Brien R, Narain A, Kim SJ, El Sony A, Edginton ME. Attitudes towards involuntary incarceration for tuberculosis: a survey of Union members. Int J Tuberc Lung Dis 2014; 18:155-9. [PMID: 24429306 DOI: 10.5588/ijtld.13.0609] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Policies involving the use of involuntary incarceration for tuberculosis (TB) are highly ethically controversial. To encourage ethical reflection within the International Union Against Tuberculosis and Lung Disease (The Union), the Ethics Advisory Group (EAG) surveyed members regarding their attitudes and values relating to involuntary incarceration for TB. METHODS Members of the Union TB section were invited to respond to an anonymous web-based survey. The survey included both multiple choice questions describing a range of scenarios regarding involuntary incarceration, and free-text fields inviting respondents to provide general comments on ethical issues. RESULTS The survey was completed by 194 participants, 33 (17%) of whom were opposed to involuntary incarceration on principle. The age and sex of the respondents was not associated with likelihood of principled opposition; respondents from North America were least likely to be opposed to involuntary incarceration (P = 0.02). Respondents were most likely to consider involuntary incarceration for persons with known multidrug-resistant TB or a history of previous treatment default, and least likely where people lived alone, were university-educated or the main income provider for their families. CONCLUSION This survey found a wide range of viewpoints regarding involuntary incarceration, and highlights a number of key elements in ethical engagement with the tensions surrounding involuntary incarceration. We provide commentary on approaches to ethical policy making in the light of these findings.
Collapse
|
39
|
Booth J, Colvill E, Eade T, Kneebone A, O'Brien R, Keall P. First Clinical Implementation of Electromagnetic Transponder-Guided MLC Tracking. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
40
|
Hammond A, Prior Y, O'Brien R, Woodbridge S, Radford K. FRI0592-HPR Work Rehabilitation in Inflammatory Arthritis: A Pilot Randomised Controlled Trial:. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.5378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
41
|
Voss J, Graff C, Schwartz A, Hyland D, Argiriadi M, Camp H, Dowding L, Friedman M, Frank K, George J, Goedken E, Lo Schiavo G, Morytko M, O'Brien R, Padley R, Rozema M, Rosebraugh M, Stewart K, Wallace G, Wishart N, Murtaza A, Olson L. THU0127 Pharmacodynamics of A Novel JAK1 Selective Inhibitor in Rat Arthritis and Anemia Models and in Healthy Human Subjects. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3823] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
42
|
Ravkilde T, O'Brien R, Keall P, Poulsen P. SP-0435: Real-time dose reconstruction during volumetric modulated arc therapy with dynamic MLC tracking. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)30540-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
43
|
Edginton ME, Ornstein T, Denholm J, El Sony A, Kim SJ, Narain A, O'Brien R. Research ethics in The Union: an 8-year review of the Ethics Advisory Group. Public Health Action 2013; 3:346-50. [PMID: 26393060 PMCID: PMC4463154 DOI: 10.5588/pha.13.0061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 10/02/2013] [Indexed: 11/10/2022] Open
Abstract
SETTING The Ethics Advisory Group (EAG) of the International Union Against Tuberculosis and Lung Disease (The Union) was established in 2004 to provide ethical guidance and promote ethical standards within The Union, including reviews of proposed research projects associated with The Union. OBJECTIVES To describe research proposal reviews conducted by the EAG in the period 2005-2012 in terms of 1) annual numbers, 2) the Union departments in which the proposals originated, 3) study designs, 4) regions and countries where studies were to be conducted, 5) study topics, 6) problems encountered by the EAG, and 7) review outcomes. DESIGN Descriptive study of application records of the EAG. RESULTS A total of 292 applications were reviewed; 79% were proposals for operational research; 85% were from Africa and Asia, with 64% from India, South Africa, Malawi, Kenya and Zimbabwe. Tuberculosis was the topic in 68%; only three studies in the 8 years were on other lung diseases. Several problems encountered are highlighted. All applications were approved except six, either immediately or after modification. CONCLUSION The proposal review process of the EAG serves to maintain ethical standards of research within The Union. Ideas for expanding the scope of the EAG are discussed.
Collapse
|
44
|
Santana-Vaz N, Tallowin S, Lewis H, Park D, O'Brien R, Patel JM. Towards safer airway management in the critically ill: lessons from National Audit Project 4. Crit Care 2013. [PMCID: PMC3642414 DOI: 10.1186/cc12093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
45
|
Patel JM, Couper K, Melody T, O'Brien R, Parekh D. Prevalence and impact of invasive fungal infections in intensive care. Crit Care 2013. [PMCID: PMC3643093 DOI: 10.1186/cc12026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
|
46
|
Malyukova A, Brown S, Papa R, O'Brien R, Giles J, Trahair TN, Dalla Pozza L, Sutton R, Liu T, Haber M, Norris MD, Lock RB, Sangfelt O, Marshall GM. FBXW7 regulates glucocorticoid response in T-cell acute lymphoblastic leukaemia by targeting the glucocorticoid receptor for degradation. Leukemia 2012; 27:1053-62. [PMID: 23228967 DOI: 10.1038/leu.2012.361] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Loss of function mutation in FBXW7, an E3 ubiquitin ligase, is associated with good prognosis and early glucocorticoid treatment response in childhood T-cell acute lymphoblastic leukemia (T-ALL) by unknown mechanisms. Here, we show that FBXW7 targets the glucocorticoid receptor α (GRα) for ubiquitylation and proteasomal degradation in a manner dependent on glycogen synthase kinase 3 β-mediated phsophorylation. FBXW7 inactivation caused elevated GRα levels, and enhanced the transcriptional response to glucocorticoids. There was significant enhancement of GR transcriptional responses in FBXW7-deficient cell lines and primary T-ALL samples, in particular, for those pro-apoptotic regulatory proteins, BIM and PUMA. Reduced FBXW7 expression or function promoted glucocorticoid sensitivity, but not sensitivity to other chemotherapeutic agents used in T-ALL. Moreover, this was a general feature of different cancer cell types. Taken together, our work defines GRα as a novel FBXW7 substrate and demonstrates that favorable patient prognosis in T-ALL is associated with FBXW7 mutations due to enhanced GRα levels and steroid sensitivity. These findings suggest that inactivation of FBXW7, a putative tumor suppressor protein, may create a synthetic lethal state in the presence of specific anticancer therapies.
Collapse
|
47
|
Cooper B, O'Brien R, Keall P. SU-C-213CD-05: Respiratory Signal Triggered 4D Cone-Beam Computed Tomography on a Linear Accelerator. Med Phys 2012. [DOI: 10.1118/1.4734634] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
48
|
Larsson T, Falk M, Keall P, O'Brien R, Munck af Rosenschöld P. PO-0880 ON THE TRADE-OFF BETWEEN DMLC TRACKING ACCURACY AND TARGET CONFORMITY FOR PROSTATE INVERSELY OPTIMIZED ARC THERAPY. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71213-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
49
|
Machouf N, Thomas R, O'Brien R, Vezina S, Longpre D, Legault D, Milne M, Fafard J, Trottier B. P1-S2.52 Risk factors for STIs among MSM attending a sexually transmitted disease clinic in Montreal, Canada. Sex Transm Infect 2011. [DOI: 10.1136/sextrans-2011-050108.109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
50
|
Thomas R, Machouf N, Trottier B, Vezina S, O'Brien R, Milne M, Lavoie S, Longpre D, Huchet E, Nguyen VK. P1-S6.13 A new approach to encourage HIV testing in high-risk populations at the Clinique l'Actuel. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|