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Walker L, Azeze S, Alencherry E, Jones R, Kardan A, Al-Natour M, Sutter C, McLoney E, Tavri S. Abstract No. 558 Quantitative comparison of liver tumor perfusion of Yttrium 90 (Y-90) using balloon occlusion versus end-hole microcatheter. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Rahnemai-Azar A, Azeze S, Rajeswaran H, Hashmi A, Walker L, Davidson J, Al-Natour M. Abstract No. 671 The effect of inferior vena cava size on filter complications: one size does not fit all. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.732] [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] Open
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Mapson R, Walker L. Review of multi-disciplinary working and parent engagement at a school-based clinic for enterally-fed children. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2019.12.064] [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]
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Matthew A, Robinson J, Ellis J, Elliott S, Singal R, McLeod D, Elterman D, Petrella A, Yang G, Jamnicky L, Finelli A, Fleshner N, Perlis N, Walker L, Bender J, Fergus K, Wassersug R. 160 Canadian TrueNTH Sexual Health and Rehabilitation eClinic (SHAReClinic) for Prostate Cancer Patients: Results of a Feasibility Study. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2019.11.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Leader A, Maier B, Grout J, Chang C, Walker L, Davila M, Lanksy A, Marron T, Flores R, Beasley M, Salmon H, Rahman A, Kenigsberg E, Merad M. P2.04-04 CITEseq Characterization in Early Stage NSCLC Patients Identifies Distinct Patterns of Immune Infiltrate. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Alexandris AS, Walker L, Liu AKL, McAleese KE, Johnson M, Pearce RKB, Gentleman SM, Attems J. Cholinergic deficits and galaninergic hyperinnervation of the nucleus basalis of Meynert in Alzheimer's disease and Lewy body disorders. Neuropathol Appl Neurobiol 2019; 46:264-278. [PMID: 31454423 DOI: 10.1111/nan.12577] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 08/17/2019] [Indexed: 12/27/2022]
Abstract
AIMS Galanin is a highly inducible neuroprotective neuropeptide and in Alzheimer's disease (AD), a network of galaninergic fibres has been reported to hypertrophy and hyperinnervate the surviving cholinergic neurons in the basal forebrain. We aimed to determine (i) the extent of galanin hyperinnervation in patients with AD and Lewy body disease and (ii) whether galanin expression relates to the neuropathological burden and cholinergic losses. METHODS Galanin immunohistochemistry was carried out in the anterior nucleus basalis of Meynert of 27 Parkinson's disease (PD) cases without cognitive impairment (mild cognitive impairment [MCI]), 15 with PD with MCI, 42 with Parkinson's disease dementia (PDD), 12 with Dementia with Lewy bodies (DLB), 19 with AD, 12 mixed AD/DLB and 16 controls. Galaninergic innervation of cholinergic neurons was scored semiquantitatively. For a subgroup of cases (n = 60), cholinergic losses were determined from maximum densities of choline acetyltransferase positive (ChAT+ve) neurons and their projection fibres. Quantitative data for α-synuclein, amyloid beta and tau pathology were obtained from tissue microarrays covering cortical/subcortical regions. RESULTS Significant losses of cholinergic neurons and their projection fibres were observed across all diseases. Galaninergic hyperinnervation was infrequent and particularly uncommon in established AD and DLB. We found that hyperinnervation frequencies are significantly higher in the transition between PD without MCI to PDD and that higher burdens of co-existent AD pathology impair this galaninergic response. CONCLUSIONS Our results suggest that galanin upregulation represents an intrinsic response early in Lewy body diseases but which fails with increasing burdens of AD related pathology.
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Lombardo MN, G-Dayanandan N, Keshipeddy S, Zhou W, Si D, Reeve SM, Alverson J, Barney P, Walker L, Hoody J, Priestley ND, Obach RS, Wright DL. Structure-Guided In Vitro to In Vivo Pharmacokinetic Optimization of Propargyl-Linked Antifolates. Drug Metab Dispos 2019; 47:995-1003. [PMID: 31201212 PMCID: PMC7184189 DOI: 10.1124/dmd.119.086504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 06/03/2019] [Indexed: 12/17/2022] Open
Abstract
Pharmacokinetic/pharmacodynamic properties are strongly correlated with the in vivo efficacy of antibiotics. Propargyl-linked antifolates, a novel class of antibiotics, demonstrate potent antibacterial activity against both Gram-positive and Gram-negative pathogenic bacteria, including multidrug-resistant Staphylococcus aureus. Here, we report our efforts to optimize the pharmacokinetic profile of this class to best match the established pharmacodynamic properties. High-resolution crystal structures were used in combination with in vitro pharmacokinetic models to design compounds that not only are metabolically stable in vivo but also retain potent antibacterial activity. The initial lead compound was prone to both N-oxidation and demethylation, which resulted in an abbreviated in vivo half-life (∼20 minutes) in mice. Stability of leads toward mouse liver microsomes was primarily used to guide medicinal chemistry efforts so robust efficacy could be demonstrated in a mouse disease model. Structure-based drug design guided mitigation of N-oxide formation through substitutions of sterically demanding groups adjacent to the pyridyl nitrogen. Additionally, deuterium and fluorine substitutions were evaluated for their effect on the rate of oxidative demethylation. The resulting compound was characterized and demonstrated to have a low projected clearance in humans with limited potential for drug-drug interactions as predicted by cytochrome P450 inhibition as well as an in vivo exposure profile that optimizes the potential for bactericidal activity, highlighting how structural data, merged with substitutions to introduce metabolic stability, are a powerful approach to drug design.
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Walker L, Santos-Iglesias P. 048 A Closer Examination of the Relationship between Erectile Function and Sexual Distress in Men with Prostate Cancer. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.03.501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Matthew A, Robinson J, McLeod D, Elliott S, Ellis J, Singal R, Elterman D, Gentile A, Yang G, Walker L, Wassersug R, Fergus K, Gajewski J, Brock G, Bender J, Jamnicky L, Berlin A, Perlis N, Fleshner N, Finelli A. 048 Canadian TrueNTH Sexual Health and Rehabilitation eClinic (SHAReClinic): Online Education and Support for Prostate Cancer Patients and their Partners. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.01.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kumari D, Walker L, Kondray V, Rajdev M, Patel I. 03:27 PM Abstract No. 76 Denver peritoneovenous shunting: large population retrospective review of complications. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Kowalkowski F, Walker L, Frantz N, Khalili H, Patel I. 03:00 PM Abstract No. 353 Urgency of percutaneous thrombectomy/thrombolysis for thrombosed dialysis arteriovenous grafts and fistulas: does time interval to intervention really affect the clinical outcome. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Kumari D, Dambaeva, Walker L, Patel I, Davidson J. Abstract No. 536 Surefire catheter versus standard end-hole microcatheter in liver-directed therapy: a retrospective study. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.617] [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] Open
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Kumari D, Walker L, Dambaeva, Azar N, Nakamoto D, Haaga J. Abstract No. 501 Celiac plexus cryoablation: retrospective review of efficacy and complications in palliative care. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Paplomata E, Borges V, Loi S, Abramson V, Hamilton E, Hurvitz S, Lin N, Walker L, Murthy RK. Abstract OT2-07-08: Withdrawn. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-ot2-07-08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was withdrawn by the authors.
Citation Format: Paplomata E, Borges V, Loi S, Abramson V, Hamilton E, Hurvitz S, Lin N, Walker L, Murthy RK. Withdrawn [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr OT2-07-08.
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Bruns D, Kovacs E, Jeong M, Buttrick P, Walker L. NOVEL AND DIRECT MYOFILAMENT-MEDIATED ACTION OF METFORMIN IN THE AGING RIGHT HEART. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Duimering A, Turner J, Andrews E, Driga A, Ayume A, Robinson J, Walker L, Wiebe E. A Multidisciplinary Clinical Experience in Sexual Health Care for Oncology Patients. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1995] [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]
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Spicer J, Kwatra V, Verma C, Ioannou K, Goldstein R, Brier T, Eremin J, Zareian N, Walker L, Lobo D, Farzaneh F, Eremin O. Phase I trial of a novel hTERT vaccination strategy addressing T effector cells and immune-suppressor mechanisms. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy288.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cross AS, Helen Kemp E, White A, Walker L, Meredith S, Sachdev P, Krone NP, Ross RJ, Wright NP, Elder CJ. International survey on high- and low-dose synacthen test and assessment of accuracy in preparing low-dose synacthen. Clin Endocrinol (Oxf) 2018; 88:744-751. [PMID: 29392744 DOI: 10.1111/cen.13559] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 01/12/2018] [Accepted: 01/24/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The short synacthen test (SST) is widely used to assess patients for adrenal insufficiency, but the frequency and protocols used across different centres for the low-dose test (LDT) are unknown. This study aimed to survey centres and test the accuracy of ten different synacthen preparation strategies used for the LDT. METHODS Members of 6 international endocrine societies were surveyed regarding diagnostic tests used for adrenal insufficiency, and in particular the SST. Synacthen was diluted for the LDT and concentrations measured using a synacthen ELISA. RESULTS Survey responses were received from 766 individuals across 60 countries (52% adult, 45% paediatric endocrinologists). The SST is used by 98% of centres: 92% using high-dose (250 μg), 43% low-dose and 37% both. Ten low-dose dilution methods were assessed and variation in synacthen concentration was demonstrated with intramethod coefficients of variation (CV) ranging from 2.1% to 109%. The method using 5% dextrose as a diluent was the least variable (CV of 2.1%). The variation in dilution methods means that the dose of synacthen administered in a LDT may vary between 0.16 and 0.81 μg. CONCLUSIONS The high-dose SST is the most popular diagnostic test of adrenal insufficiency, but up to 72% of paediatric endocrinologists use a LDT. There is considerable variation observed both within and between low-dose synacthen dilution methods creating considerable risk of inaccurate dosing and thereby invalid results.
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Kumari D, Walker L, Bochnakova T, Mitchell S, Buethe J. 3:09 PM Abstract No. 400 Women in interventional radiology: factors that influence women to pursue IR. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Burns T, Gargan L, Walker L, Heatherington S, Topping-Morris B, Vellonoweth C, Deahl M, James D, McDougall N, Richards J. Not Just Bricks and Mortar. PSYCHIATRIC BULLETIN 2018. [DOI: 10.1192/pb.22.8.465] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Walker L, Clendon J. Early nurse attrition in New Zealand and associated policy implications. Int Nurs Rev 2017; 65:33-40. [DOI: 10.1111/inr.12411] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Singh SP, Tuomainen H, Girolamo GD, Maras A, Santosh P, McNicholas F, Schulze U, Purper-Ouakil D, Tremmery S, Franić T, Madan J, Paul M, Verhulst FC, Dieleman GC, Warwick J, Wolke D, Street C, Daffern C, Tah P, Griffin J, Canaway A, Signorini G, Gerritsen S, Adams L, O'Hara L, Aslan S, Russet F, Davidović N, Tuffrey A, Wilson A, Gatherer C, Walker L. Protocol for a cohort study of adolescent mental health service users with a nested cluster randomised controlled trial to assess the clinical and cost-effectiveness of managed transition in improving transitions from child to adult mental health services (the MILESTONE study). BMJ Open 2017; 7:e016055. [PMID: 29042376 PMCID: PMC5652531 DOI: 10.1136/bmjopen-2017-016055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 08/18/2017] [Accepted: 08/25/2017] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Disruption of care during transition from child and adolescent mental health services (CAMHS) to adult mental health services may adversely affect the health and well-being of service users. The MILESTONE (Managing the Link and Strengthening Transition from Child to Adult Mental Healthcare) study evaluates the longitudinal course and outcomes of adolescents approaching the transition boundary (TB) of their CAMHS and determines the effectiveness of the model of managed transition in improving outcomes, compared with usual care. METHODS AND ANALYSIS This is a cohort study with a nested cluster randomised controlled trial. Recruited CAMHS have been randomised to provide either (1) managed transition using the Transition Readiness and Appropriateness Measure score summary as a decision aid, or (2) usual care for young people reaching the TB. Participants are young people within 1 year of reaching the TB of their CAMHS in eight European countries; one parent/carer and a CAMHS clinician for each recruited young person; and adult mental health clinician or other community-based care provider, if young person transitions. The primary outcome is Health of the Nation Outcome Scale for Children and Adolescents (HoNOSCA) measuring health and social functioning at 15 months postintervention. The secondary outcomes include mental health, quality of life, transition experience and healthcare usage assessed at 9, 15 and 24 months postintervention. With a mean cluster size of 21, a total of 840 participants randomised in a 1:2 intervention to control are required, providing 89% power to detect a difference in HoNOSCA score of 0.30 SD. The addition of 210 recruits for the cohort study ensures sufficient power for studying predictors, resulting in 1050 participants and an approximate 1:3 randomisation. ETHICS AND DISSEMINATION The study protocol was approved by the UK National Research Ethics Service (15/WM/0052) and equivalent ethics boards in participating countries. Results will be reported at conferences, in peer-reviewed publications and to all relevant stakeholder groups. TRIAL REGISTRATION NUMBER ISRCTN83240263; NCT03013595 (pre-results).
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Bryant JL, Gieling RG, Meredith SL, Allen TJ, Walker L, Telfer BA, Supuran CT, Williams KJ, White A. Novel carbonic anhydrase IX-targeted therapy enhances the anti-tumour effects of cisplatin in small cell lung cancer. Int J Cancer 2017; 142:191-201. [DOI: 10.1002/ijc.31042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 08/28/2017] [Indexed: 12/12/2022]
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Zhang M, Matyunina L, Walker L, Chen W, Xiao H, Benigno B, Wu R, McDonald J. Evidence for the Importance of Post-transcriptional Regulatorychanges in ovarian cancer metastasis and the contribution of miRNAs. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.07.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Martin D, Macary C, Jones C, Walker L, O'Connor M, Thompson E, Gallitano K, Leffler M, McSherry C, Kosinski M, White M. Development of novel observer-reported outcome assessments in clinical trials of patients with Duchenne muscular dystrophy. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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