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Clarke D, Phillips J, Divoky M, Pilar J, Navratil P, Hanus M, Severova P, Denk O, Paliesek T, Smrz M, Mason P, Butcher T, Edwards C, Collier J, Mocek T. Improved stability second harmonic conversion of a diode-pumped Yb:YAG laser at the 0.5 kW level. Opt Lett 2023; 48:6320-6323. [PMID: 38039257 DOI: 10.1364/ol.497181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 10/31/2023] [Indexed: 12/03/2023]
Abstract
We report on efficient and stable, type-I phase-matched second harmonic conversion of a nanosecond high-energy, diode-pumped, Yb:YAG laser. With a frequency-doubling crystal in an enclosed, temperature controller with optical windows, 0.5% energy stability was achieved for approximately half an hour. This resulted in 48.9 J pulses at 10 Hz (489 W) and a conversion efficiency of 73.8%. These results are particularly important for stable and reliable operation of high-energy, frequency-doubled lasers.
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2
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Mason P, Barrett H, Banerjee S, Butcher T, Collier J. Generation of Joule-level green bursts of nanosecond pulses from a DPSSL amplifier. Opt Express 2023; 31:19510-19522. [PMID: 37381364 DOI: 10.1364/oe.492263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 05/15/2023] [Indexed: 06/30/2023]
Abstract
A new approach to generation of a burst of high-energy green pulses by placing a high-energy multi-slab Yb:YAG DPSSL amplifier and SHG crystal inside a regenerative cavity is presented. In a proof-of-concept test, stable generation of a burst of six green (515 nm) pulses, each 10 ns in duration and separated by 29.4 ns (34 MHz), with 2.0 J total energy has been demonstrated at 1 Hz from a non-optimized ring cavity design. A maximum individual green pulse energy of 580 mJ was produced from a 1.78 J circulating infrared (1030 nm) pulse (average fluence 0.9 J/cm2), corresponding to a SHG conversion efficiency of 32%. Experimental results have been compared with predicted performance from a simple model. Efficient generation of a burst of high energy green pulses offers an attractive pump source for Ti:Sa amplifiers, providing the potential to reduce the impact of amplified stimulated emission by reducing instantaneous transverse gain.
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3
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Schmitz ND, Ovington L, Berlin J, Zhang S, Collier J. Optimal usage of antibacterial sutures for wound closure in clinical trials addressing SSI. Lancet 2023; 401:1497-1498. [PMID: 37149304 DOI: 10.1016/s0140-6736(23)00668-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 03/26/2023] [Indexed: 05/08/2023]
Affiliation(s)
| | | | - Jesse Berlin
- Center for Pharmacoepidemiology and Treatment, Rutgers University, New Brunswick, NJ, USA
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4
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Magni N, Collier J, Rice D, McNair P. Response to the letter to the editor: "Prevalence and predictors of neglect-like symptoms in patients with painful hand osteoarthritis". Musculoskelet Sci Pract 2023; 64:102736. [PMID: 36933420 DOI: 10.1016/j.msksp.2023.102736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 02/23/2023] [Indexed: 03/20/2023]
Affiliation(s)
- N Magni
- Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand.
| | - J Collier
- Department of Anaesthesiology and Perioperative Medicine, Waitemata District Health Board, Auckland, New Zealand
| | - D Rice
- Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand; Department of Anaesthesiology and Perioperative Medicine, Waitemata District Health Board, Auckland, New Zealand
| | - P McNair
- Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand
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5
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Magni N, Collier J, Rice D, McNair P. Neglect-like symptoms and their relationships with other clinical features in people with hand osteoarthritis: An exploratory study. Musculoskelet Sci Pract 2022; 62:102662. [PMID: 36087512 DOI: 10.1016/j.msksp.2022.102662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Symptomatic hand osteoarthritis (OA) is a debilitating condition. Body schema impairments such as neglect-like symptoms have been previously reported in people with symptomatic hand OA, however, little is known about their clinical importance, or relationships with other clinical features. OBJECTIVES The aim of this cross-sectional study was to assess the prevalence of neglect-like symptoms in painful hand OA and their association with measures of depression, pain catastrophising, sleep quality, function, pain interference and pain duration whilst controlling for important covariates. DESIGN Secondary analysis of cross-sectional study. METHODS Logistic regression with age, sex, and worst pain intensity as covariates were utilised to assess differences between participants with and without neglect-like symptoms. RESULTS A total of 121 participants were recruited. Sixty-one percent of participants presented with neglect-like symptoms. Participants with longer pain duration had greater odds of presenting with neglect-like symptoms (OR: 1.10 95%CI: 1.01 to 1.19; p = 0.012). No difference was observed for depression, pain catastrophising, sleep quality, function, or pain interference. CONCLUSIONS A large proportion of participants with symptomatic hand OA reported neglect-like symptoms, the presence of which was associated with longer pain duration.
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Affiliation(s)
- N Magni
- Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand.
| | - J Collier
- Department of Anaesthesiology and Perioperative Medicine, Waitemata District Health Board, Auckland, New Zealand
| | - D Rice
- Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand; Department of Anaesthesiology and Perioperative Medicine, Waitemata District Health Board, Auckland, New Zealand
| | - P McNair
- Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand
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Noton T, Armes H, Mistry R, Tam A, Collier J, Greaney L. 780 Are E-Scooters Safe for Widespread Public Use? A Case Series Examining Severe Facial Injuries Secondary to E-Scooter Accidents. Br J Surg 2022. [DOI: 10.1093/bjs/znac269.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
E-scooter use is becoming commonplace across the UK as an increasing number of towns and cities launch trials with pay-as-you-go e-scooter companies. In addition, e-scooters are cheap method of transport, easily available for an individual to purchase online, without restriction. We present two cases of patients having suffered complex facial injuries secondary to e-scooter accidents.
The first is a 38-year-old male, who was thrown from an e-scooter and had associated loss of consciousness. CT facial bones demonstrated extensive fractures to the bilateral maxillary and frontal sinuses, nasal bones, bilateral orbital floors, and mandible. The Le Fort II and mandibular fractures were fixed in two procedures. The patient has ongoing neuropathic pain around the right mandibular condyle and is receiving input from orthognathic specialists.
The second patient is a 60-year-old male, who collided with the rear of a car and was thrown forward, hitting his face on the tarmac. CT facial bones showed a Le Fort II fracture pattern and a fractured left inferior orbital rim, with extensive surgical emphysema of the face. He underwent plating of the bilateral Le Fort II fractures and application of intermaxillary fixation wires.
With little to no enforcement of personal protective equipment use and safety advice whilst utilising e-scooter services, the number of people suffering serious injuries from using such equipment is set to skyrocket. Increased awareness and education around the danger of e-scooters needs to be addressed and should be prioritised by local authorities and public health services.
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Affiliation(s)
- T Noton
- King's College Hospital , London , United Kingdom
| | - H Armes
- Chelsea and Westminster Hospital , London , United Kingdom
| | - R Mistry
- Chelsea and Westminster Hospital , London , United Kingdom
| | - A Tam
- Chelsea and Westminster Hospital , London , United Kingdom
| | - J Collier
- Chelsea and Westminster Hospital , London , United Kingdom
| | - L Greaney
- Chelsea and Westminster Hospital , London , United Kingdom
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7
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Magill H, Ioannidi L, Collier J. 811 Dermal Fillers and Delayed Hypersensitivity Following Influenza Vaccine: A Case Report. Br J Surg 2022. [PMCID: PMC9452086 DOI: 10.1093/bjs/znac269.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Background Case Discussion
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Affiliation(s)
- H Magill
- Chelsea and Westminster Hospital, London, United Kingdom
| | - L Ioannidi
- Chelsea and Westminster Hospital, London, United Kingdom
| | - J Collier
- Chelsea and Westminster Hospital, London, United Kingdom
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Benge E, Tran V, Sheikan N, Bhatia S, McWhorter Y, Collier J, Chung A. Symptomatic Improvement in Cicatricial Pemphigoid of the Trachea Achieved with Laser Ablation Bronchoscopy. Southwest J Pulm Crit Care 2022. [DOI: 10.13175/swjpcc058-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cicatricial pemphigoid (CP) with tracheal involvement is a rare and potentially deadly condition. Here, we report the first case in which Nd:YAG laser (1064nm) laser ablation bronchoscopy was used to treat CP with tracheal involvement. Our patient is a 71-year-old male with a history of CP refractory to medical therapy affecting his trachea who presented to the emergency department with dyspnea. He ultimately underwent bronchoscopy with Nd: YAG laser (1064nm) laser ablation, which resulted in a temporary alleviation of his respiratory symptoms. A repeat laser ablation was planned in hopes of prolonging the patient’s remission, but due to interval changes in the patient’s airway anatomy, it was deemed unsafe. While our patient’s uniquely advanced disease was not amenable to further laser-mediated intervention, it is possible that patients with less advanced disease may experience better outcomes with similar therapy. This case shows the promise laser ablation could hold for patients with tracheal cicatricial pemphigoid.
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Divoký M, Pilař J, Hanuš M, Navrátil P, Denk O, Severová P, Mason P, Butcher T, Banerjee S, De Vido M, Edwards C, Collier J, Smrž M, Mocek T. 150 J DPSSL operating at 1.5 kW level. Opt Lett 2021; 46:5771-5773. [PMID: 34780458 DOI: 10.1364/ol.444902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/01/2021] [Indexed: 06/13/2023]
Abstract
We report on obtaining output energy of 146 J in 10 ns long pulses at 10 Hz repetition rate from Bivoj, a multi-Joule multi-slab cryogenic gas-cooled diode pumped solid state laser, by overcoming its damage threshold bottleneck. This is a 40% energy and power increase of the laser system in comparison to our previous publication and to the most powerful multi-Joule high power laser system.
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10
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Woods AD, Purohit R, Mitchell L, Collier J, Collier K, Lathara M, Learned K, Vaske O, Geiger H, Wrzeszczynski KO, Jobanputra V, Srinivasa G, Rudzinski E, Whelan K, Beierle E, Spunt S, Keller C, Wadhwa A. Metastatic Pediatric Sclerosing Epithelioid Fibrosarcoma. Cold Spring Harb Mol Case Stud 2021; 7:mcs.a006093. [PMID: 34362827 PMCID: PMC8559621 DOI: 10.1101/mcs.a006093] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 03/01/2021] [Accepted: 07/02/2021] [Indexed: 11/25/2022] Open
Abstract
Sclerosing epithelioid fibrosarcoma (SEF) is a rare and aggressive soft-tissue sarcoma thought to originate in fibroblasts of the tissues comprising tendons, ligaments, and muscles. Minimally responsive to conventional cytotoxic chemotherapies, >50% of SEF patients experience local recurrence and/or metastatic disease. SEF is most commonly discovered in middle-aged and elderly adults, but also rarely in children. A common gene fusion occurring between the EWSR1 and CREB3L1 genes has been observed in 80%–90% of SEF cases. We describe here the youngest SEF patient reported to date (a 3-yr-old Caucasian male) who presented with numerous bony and lung metastases. Additionally, we perform a comprehensive literature review of all SEF-related articles published since the disease was first characterized. Finally, we describe the generation of an SEF primary cell line, the first such culture to be reported. The patient described here experienced persistent disease progression despite aggressive treatment including multiple resections, radiotherapy, and numerous chemotherapies and targeted therapeutics. Untreated and locally recurrent tumor and metastatic tissue were sequenced by whole-genome, whole-exome, and deep-transcriptome next-generation sequencing with comparison to a patient-matched normal blood sample. Consistent across all sequencing analyses was the disease-defining EWSR1–CREB3L1 fusion as a single feature consensus. We provide an analysis of our genomic findings and discuss potential therapeutic strategies for SEF.
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11
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Kluger MT, Skarin M, Collier J, Rice DA, McNair PJ, Seow MY, Connolly MJ. Steroids to reduce the impact on delirium (STRIDE): a double-blind, randomised, placebo-controlled feasibility trial of pre-operative dexamethasone in people with hip fracture. Anaesthesia 2021; 76:1031-1041. [PMID: 33899214 DOI: 10.1111/anae.15465] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2021] [Indexed: 01/18/2023]
Abstract
Neuro-inflammation may be important in the pathogenesis of postoperative delirium following hip fracture surgery. Studies have suggested a potential role for steroids in reducing postoperative delirium; however, the potential efficacy and safety of pre-operative high-dose dexamethasone in this specific population is largely unknown. Conducting such a study could be challenging, considering the multidisciplinary team involvement and the emergency nature of the surgery. The aim of this study was to assess feasibility and effectiveness of dexamethasone given as early as possible following hospital admission for hip fracture, to inform whether a full-scale trial is warranted. This single-centre, randomised, double-blind, placebo-controlled study randomly allocated 79 participants undergoing hip fracture surgery to dexamethasone 20 mg or placebo pre-operatively. Eligibility and recruitment rates, timing of the intervention and adverse events were recorded. Incidence and severity of postoperative delirium were assessed using the 4AT delirium screening tool and the Memorial Delirium Assessment Scale. Postoperative pain, length of stay and mortality were also assessed. The eligibility rate for inclusion was 178/527 (34%), and 57/178 (32%) of eligible patients presented to hospital when no researcher was available (e.g. after-hours, weekends, public holidays). Recruitment was limited mainly by ethical limitations (not including patients with impaired cognition) and lack of weekend staffing. Median (IQR [range]) time from emergency department admission to drug administration was 13.3 (5.9-17.6 [1.8-139.6]) hours. There was a significant difference in delirium severity scores, favouring the dexamethasone group: median (IQR [range]) 5 (3-6 [3-7]) vs. 9 (6-13 [5-14]) in the placebo group, with the probability of superiority effect size being 0.89, p = 0.010. Delirium incidence did not differ between groups: 6/40 (15%) in the dexamethasone group vs. 9/39 (23%) in the placebo group, relative risk (95%CI) 0.65 (0.22-1.65), p = 0.360). A larger randomised controlled trial is feasible and ideally this should include people with existing cognitive impairment, seven days-a-week cover and a multicentre design.
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Affiliation(s)
- M T Kluger
- Department of Anaesthesiology and Peri-operative Medicine, Waitematā DHB, Auckland, New Zealand.,Department of Anaesthesiology, University of Auckland, Auckland, New Zealand
| | - M Skarin
- Department of Anaesthesiology and Peri-operative Medicine, Waitematā DHB, Auckland, New Zealand
| | - J Collier
- Department of Anaesthesiology and Peri-operative Medicine, Waitematā DHB, Auckland, New Zealand
| | - D A Rice
- Health and Rehabilitation Research Institute, AUT University, Auckland, New Zealand
| | - P J McNair
- Health and Rehabilitation Research Institute, AUT University, Auckland, New Zealand
| | - M Y Seow
- Department of Orthopaedic Surgery, Waitematā DHB, Auckland, New Zealand
| | - M J Connolly
- Department of Geriatric Medicine, University of Auckland and Waitematā DHB, Auckland, New Zealand
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12
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Phillips JP, Banerjee S, Mason P, Smith J, Spear J, De Vido M, Ertel K, Butcher T, Quinn G, Clarke D, Edwards C, Hernandez-Gomez C, Collier J. Second and third harmonic conversion of a kilowatt average power, 100-J-level diode pumped Yb:YAG laser in large aperture LBO. Opt Lett 2021; 46:1808-1811. [PMID: 33857075 DOI: 10.1364/ol.419861] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
We report on the successful demonstration of second and third harmonic conversion of a high pulse energy, high average power 1030 nm diode pumped Yb-doped yttrium aluminum garnet (Yb:YAG) nanosecond pulsed laser in a large aperture lithium triborate (LBO) crystal. We demonstrated generation of 59.7 J at 10 Hz (597 W) at 515 nm (second harmonic) and of 65.0 J at 1 Hz (65 W) at 343 nm (third harmonic), with efficiencies of 66% and 68%, respectively. These results, to the best of our knowledge, represent the highest energy and power reported for frequency conversion to green and UV-A wavelengths.
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13
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Holland K, Bennett WE, Slaven JE, Collier J, Waltz G, Pfefferkorn M. Proactive measurement of infliximab drug levels in children with Crohn’s disease. Ann Gastroenterol 2021; 35:56-62. [PMID: 34987289 PMCID: PMC8713342 DOI: 10.20524/aog.2021.0676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 08/30/2021] [Indexed: 11/11/2022] Open
Abstract
Background Methods Results Conclusion
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Affiliation(s)
| | - William E. Bennett
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA (William E. Bennett)
| | - James E. Slaven
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA (James E. Slaven)
| | - John Collier
- Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah, USA (John Collier)
| | - Gail Waltz
- Department of Pediatrics, Riley Hospital for Children, Indianapolis, IN, USA (Gail Waltz)
| | - Marian Pfefferkorn
- Department of Pediatrics, Indiana University School of Medicine, USA (Marian Pfefferkorn)
- Correspondence to: Marian Pfefferkorn M.D., 705 Riley Hospital Drive #4210, Indianapolis, IN 46202, USA, e-mail:
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14
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Phillips JP, Banerjee S, Ertel K, Mason P, Smith J, Butcher T, De Vido M, Edwards C, Hernandez-Gomez C, Collier J. Stable high-energy, high-repetition-rate, frequency doubling in a large aperture temperature-controlled LBO at 515 nm. Opt Lett 2020; 45:2946-2949. [PMID: 32412507 DOI: 10.1364/ol.383129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
We report on frequency doubling of high-energy, high-repetition-rate ns pulses from a cryogenically gas cooled, multi-slab Yb:YAG laser system, using a type-I phase-matched lithium triborate (LBO) crystal. Pulse energy of 4.3 J was extracted at 515 nm for a fundamental input of 5.4 J at 10 Hz (54 W), corresponding to a conversion efficiency of 77%. However, during long-term operation, a significant reduction of efficiency (more than 25%) was observed owing to the phase mismatch arising due to the temperature-dependent refractive index change in the crystal. This forced frequent angle tuning of the crystal to recover the second-harmonic generation (SHG) energy. More than a five-fold improvement in energy stability of SHG was observed when the LBO crystal was mounted in an oven, and its temperature was controlled at 27°C. Stable frequency doubling with 0.8% rms energy variation was achieved at a higher input power of 74 W when the LBO temperature was controlled at 50°C.
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15
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Divoky M, Pilar J, Hanus M, Navratil P, Sawicka-Chyla M, De Vido M, Phillips PJ, Ertel K, Butcher T, Fibrich M, Green JT, Koselja M, Preclikova J, Kubat J, Houzvicka J, Rus B, Collier J, Lucianetti A, Mocek T. Performance comparison of Yb:YAG ceramics and crystal gain material in a large-area, high-energy, high average-power diode-pumped laser. Opt Express 2020; 28:3636-3646. [PMID: 32122028 DOI: 10.1364/oe.379713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
We compare for the first time the influence of different Yb:YAG gain media on the performance of a large-area, high average-power laser system with an output energy of up to 6 J. Monocrystalline slabs grown by a new technique without central growth defect are compared with ceramics. Small signal gain, maximum output energy and thermal lensing are compared for ceramic slabs with co-sintered amplified spontaneous emission (ASE) absorber cladding, monocrystalline slab with and without optically bonded ASE absorber cladding, and surface structured monocrystalline slabs. We show that these large monocrystals with optically bonded absorber cladding have similar performance to cladded ceramics, so far the only material for high-energy Yb:YAG lasers.
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Abstract
Supervenience is a relationship which has been used recently to explain the physical determination of biological phenomena despite resistance to reduction (Rosenberg, 1978, 1985; Sober, 1984a). Supervenience, however, is plagued by ambiguities which weaken its explanatory value and obscure some interesting aspects of reduction in biology. Although I suspect that similar considerations affect the use of supervenience in ethics and the philosophy of mind, I don’t intend anything I have to say here to apply outside of the physical and biological cases I consider.The main point of this paper is that there is a property of biological systems which makes it both misleading and inappropriate to reduce central biological phenomena to the properties of underlying components. Despite this, reductive explanation has been a major source of innovation in biological theory. The apparent tension can be resolved if underlying properties are explanatorily relevant to the higher level phenomena even though the latter are not strictly reducible to the former. Supervenience, I will argue, is not robust enough to deny reduction while supporting explanatory relevance.
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17
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Jack S, Madhivanan K, Ramadesikan S, Subramanian S, Edwards DF, Elzey BD, Dhawan D, McCluskey A, Kischuk EM, Loftis AR, Truex N, Santos M, Lu M, Rabideau A, Pentelute B, Collier J, Kaimakliotis H, Koch M, Ratliff TL, Knapp DW, Aguilar RC. A novel, safe, fast and efficient treatment for Her2-positive and negative bladder cancer utilizing an EGF-anthrax toxin chimera. Int J Cancer 2019; 146:449-460. [PMID: 31584195 DOI: 10.1002/ijc.32719] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/10/2019] [Accepted: 09/11/2019] [Indexed: 12/20/2022]
Abstract
Bladder cancer is the sixth most common cancer in the United States, and it exhibits an alarming 70% recurrence rate. Thus, the development of more efficient antibladder cancer approaches is a high priority. Accordingly, this work provides the basis for a transformative anticancer strategy that takes advantage of the unique characteristics of the bladder. Unlike mucin-shielded normal bladder cells, cancer cells are exposed to the bladder lumen and overexpress EGFR. Therefore, we used an EGF-conjugated anthrax toxin that after targeting EGFR was internalized and triggered apoptosis in exposed bladder cancer cells. This unique agent presented advantages over other EGF-based technologies and other toxin-derivatives. In contrast to known agents, this EGF-toxin conjugate promoted its own uptake via receptor microclustering even in the presence of Her2 and induced cell death with a LC50 < 1 nM. Furthermore, our data showed that exposures as short as ≈3 min were enough to commit human (T24), mouse (MB49) and canine (primary) bladder cancer cells to apoptosis. Exposure of tumor-free mice and dogs with the agent resulted in no toxicity. In addition, the EGF-toxin was able to eliminate cells from human patient tumor samples. Importantly, the administration of EGF-toxin to dogs with spontaneous bladder cancer, who had failed or were not eligible for other therapies, resulted in ~30% average tumor reduction after one treatment cycle. Because of its in vitro and in vivo high efficiency, fast action (reducing treatment time from hours to minutes) and safety, we propose that this EGF-anthrax toxin conjugate provides the basis for new, transformative approaches against bladder cancer.
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Affiliation(s)
- Sherwin Jack
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Kayalvizhi Madhivanan
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Swetha Ramadesikan
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Sneha Subramanian
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Daniel F Edwards
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Bennett D Elzey
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN.,Department of Urology, Indiana University School of Medicine, Indianapolis, IN
| | - Deepika Dhawan
- Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN
| | | | - Erin M Kischuk
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN
| | - Alexander R Loftis
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Nicholas Truex
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Michael Santos
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Mike Lu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Amy Rabideau
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA
| | - Bradley Pentelute
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA.,Koch Institute MIT, Cambridge, MA.,Broad Institute of Harvard and MIT, Cambridge, MA.,Center for Environmental Health Sciences MIT, Cambridge, MA
| | - John Collier
- Department of Microbiology, Harvard Medical School, Boston, MA
| | | | - Michael Koch
- Department of Urology, Indiana University School of Medicine, Indianapolis, IN
| | - Timothy L Ratliff
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN
| | - Deborah W Knapp
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN
| | - Ruben C Aguilar
- Purdue University Center for Cancer Research, West Lafayette, IN.,Department of Biological Sciences, Purdue University, West Lafayette, IN
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18
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Aboushelbaya R, Glize K, Savin AF, Mayr M, Spiers B, Wang R, Collier J, Marklund M, Trines RMGM, Bingham R, Norreys PA. Orbital Angular Momentum Coupling in Elastic Photon-Photon Scattering. Phys Rev Lett 2019; 123:113604. [PMID: 31573265 DOI: 10.1103/physrevlett.123.113604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/20/2019] [Indexed: 06/10/2023]
Abstract
In this Letter, we investigate the effect of orbital angular momentum (OAM) on elastic photon-photon scattering in a vacuum for the first time. We define exact solutions to the vacuum electromagnetic wave equation which carry OAM. Using those, the expected coupling between three initial waves is derived in the framework of an effective field theory based on the Euler-Heisenberg Lagrangian and shows that OAM adds a signature to the generated photons thereby greatly improving the signal-to-noise ratio. This forms the basis for a proposed high-power laser experiment utilizing quantum optics techniques to filter the generated photons based on their OAM state.
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Affiliation(s)
- R Aboushelbaya
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - K Glize
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - A F Savin
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - M Mayr
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - B Spiers
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - R Wang
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - J Collier
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - M Marklund
- Department of Physics, University of Gothenburg, SE-41296 Gothenburg, Sweden
| | - R M G M Trines
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - R Bingham
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
- Department of Physics, University of Strathclyde, Strathclyde G4 0NG, United Kingdom
| | - P A Norreys
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
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19
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Villamaina R, Liu S, Nova I, Tronconi E, Ruggeri MP, Collier J, York A, Thompsett D. Speciation of Cu Cations in Cu-CHA Catalysts for NH3-SCR: Effects of SiO2/AlO3 Ratio and Cu-Loading Investigated by Transient Response Methods. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02578] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. Villamaina
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, via La Masa 34, 20156 Milan, Italy
| | - Shaojun Liu
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, via La Masa 34, 20156 Milan, Italy
| | - I. Nova
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, via La Masa 34, 20156 Milan, Italy
| | - E. Tronconi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, via La Masa 34, 20156 Milan, Italy
| | - M. P. Ruggeri
- Johnson Matthey Technology Centre, Blounts Court Road, Sonning Common, Reading RG4 9NH, United Kingdom
| | - J. Collier
- Johnson Matthey Technology Centre, Blounts Court Road, Sonning Common, Reading RG4 9NH, United Kingdom
| | - A. York
- Johnson Matthey Technology Centre, Blounts Court Road, Sonning Common, Reading RG4 9NH, United Kingdom
| | - D. Thompsett
- Johnson Matthey Technology Centre, Blounts Court Road, Sonning Common, Reading RG4 9NH, United Kingdom
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20
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Cornpropst M, Dobo S, Collis P, Collier J, Sheridan W. PHARMACOKINETICS AND PHARMACODYNAMICS OF BCX7353, AN ORAL PLASMA KALLIKREIN INHIBITOR, IN HEALTHY JAPANESE SUBJECTS. Ann Allergy Asthma Immunol 2018. [DOI: 10.1016/j.anai.2018.09.106] [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: 11/26/2022]
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21
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22
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Watson L, Reed A, Jakharia-Shah N, Brennan P, Hammond D, Collier J. Publication of scientific research presented at scientific meetings of the British Association of Oral and Maxillofacial Surgeons: 10 years on – have we published or perished? Br J Oral Maxillofac Surg 2018; 56:611-614. [DOI: 10.1016/j.bjoms.2018.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 06/21/2018] [Indexed: 11/25/2022]
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23
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Oláhová M, Collier J, Heidler J, Thompson K, Lightowlers R, Chrzanowska-Lightowlers Z, Wittig I, Taylor R. CRISPR/Cas9-mediated knockout of RTN4IP1 leads to a severe Complex I assembly defect. Neuromuscul Disord 2018. [DOI: 10.1016/s0960-8966(18)30388-2] [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: 11/27/2022]
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24
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Constant M, Collier J. Headspace Gas Chromatography Profiles of Fruit-Flavored Malt Beverages Using Solid-Phase MicroExtraction. Journal of the American Society of Brewing Chemists 2018. [DOI: 10.1094/asbcj-55-0112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Marc Constant
- Miller Brewing Co., W159 N10165 Comanche, Germantown, WI 53022
| | - John Collier
- Miller Brewing Co., PO Box 482, 3939 West Highland Blvd., Milwaukee, WI 53201-0482
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25
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Franks E, Halvorsen E, Melesse E, Unni A, Collier J, Oh M, Lam V, Krystal G, English J, Lam W, Lam S, Abraham N, Bennewith K, Lockwood W. MA 05.12 Oncogenic Drivers Induce Production of CCL5 to Recruit Regulatory T-Cells Early in Lung Cancer Progression. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.487] [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: 10/18/2022]
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26
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McDaid LA, Collier J, Platt MJ. Unique identifiers needed to make national data sets fit for public health purposes: the example of subsequent teenage pregnancy in England and Wales. Public Health 2017; 153:58-60. [PMID: 28938187 DOI: 10.1016/j.puhe.2017.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 07/07/2017] [Indexed: 11/19/2022]
Affiliation(s)
- L A McDaid
- School of Psychology, University of East Anglia, UK.
| | - J Collier
- School of Psychology, University of East Anglia, UK
| | - M J Platt
- Norwich Medical School, University of East Anglia, UK
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27
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Matt D, Graff D, Collier J, Wilkerson B. Frequent incubator openings have no effect on blastocyst development rate. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.479] [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: 11/24/2022]
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28
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Bartlett D, Galgut Y, Lobsey J, Hall T, Collier J, Pearson J, Rutherford D, Nguyen B, Wong K. 0393 COGNITIVE BEHAVIOR THERAPY FOR INSOMNIA ADMINISTERED BY PRACTICE NURSES IN RURAL NEW SOUTH WALES AUSTRALIA. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.392] [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: 11/14/2022] Open
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29
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Lima B, Hall S, Gonzalez-Stawinski G, Collier J, Tecson K, Kale P, Still S, Sheikh A, Baxter R, Joseph S. Postoperative Vasoplegia Is Strongly Associated with Short and Long Term Outcomes in Patients Receiving Left Ventricular Assist Device (LVAD) Therapy. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.212] [Citation(s) in RCA: 1] [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: 10/19/2022] Open
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30
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Lima B, Collier J, Shaikh A, Tecson K, Still S, Baxter R, Felius J, Hall S, Gonzalez-Stawinski G, Joseph S. Predictors of Acute Kidney Injury Following Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1207] [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: 10/19/2022] Open
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31
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Culver EL, Wang LM, Bungay H, Chapman RW, Collier J. A rare cause of colonic thickening and lymphadenopathy. Gut 2017; 66:78. [PMID: 27353744 DOI: 10.1136/gutjnl-2016-311433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 06/02/2016] [Accepted: 06/06/2016] [Indexed: 12/08/2022]
Affiliation(s)
- Emma L Culver
- Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, UK
| | - Lai Mun Wang
- Cellular Pathology Department, John Radcliffe Hospital, Oxford, UK
| | - Helen Bungay
- Radiology Department, John Radcliffe and Churchill Hospital, Oxford, UK
| | - R W Chapman
- Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, UK
| | - J Collier
- Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, UK
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32
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Cornpropst M, Collis P, Collier J, Babu YS, Wilson R, Zhang J, Fang L, Zong J, Sheridan WP. Safety, pharmacokinetics, and pharmacodynamics of avoralstat, an oral plasma kallikrein inhibitor: phase 1 study. Allergy 2016; 71:1676-1683. [PMID: 27154593 DOI: 10.1111/all.12930] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Avoralstat is a potent small-molecule oral plasma kallikrein inhibitor under development for treatment of hereditary angioedema (HAE). This first-in-human study evaluated the safety, tolerability, pharmacokinetics, and pharmacodynamics of avoralstat. METHODS This double-blind, placebo-controlled, ascending-dose cohort trial evaluated avoralstat single doses of 50, 125, 250, 500, and 1000 mg and multiple doses up to 2400 mg daily (100, 200, 400, and 800 mg every 8 h [q8 h] up to 7 days). RESULTS Avoralstat (n = 71) was generally well tolerated with no signals for a safety concern; there were no serious adverse events (AEs) or discontinuations due to AEs, and compared to placebo (n = 18), no notable difference in AEs. Four moderate severity AEs were reported in two subjects; syncope after a single 250 mg dose (one subject) and abdominal pain, back pain, and eczema after multiple doses of 800 mg avoralstat (one subject). For multiple-dose cohorts, the incidence of gastrointestinal AEs was highest at the 2400 mg/day dose. Elimination of avoralstat was bi-exponential with a terminal half-life of 12-31 h. Inhibition of plasma kallikrein was observed at all doses, and the degree of inhibition was highly correlated with avoralstat concentrations (R = 0.93). Mean avoralstat concentrations at doses ≥400 mg q8 h met or exceeded plasma kallikrein EC50 values throughout the dosing interval. CONCLUSION Avoralstat was well tolerated, and drug exposure was sufficient to meet target levels for inhibition of plasma kallikrein. Based on these results, the 400 mg q8 h dose was selected for further evaluation in patients with HAE.
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Affiliation(s)
| | - P. Collis
- BioCryst Pharmaceuticals; Durham NC USA
| | | | - Y. S. Babu
- BioCryst Pharmaceuticals; Birmingham AL USA
| | - R. Wilson
- BioCryst Pharmaceuticals; Birmingham AL USA
| | - J. Zhang
- BioCryst Pharmaceuticals; Birmingham AL USA
| | - L. Fang
- PharStat Inc.; Durham NC USA
| | - J. Zong
- PharStat Inc.; Durham NC USA
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33
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Richardson C, Collier J, Niall K. The smartlock hybrid maxillo-mandibular fixation system – A new device for mandibular-maxillary fixation. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.502] [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: 11/27/2022]
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34
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Phillips JP, Banerjee S, Smith J, Fitton M, Davenne T, Ertel K, Mason P, Butcher T, De Vido M, Greenhalgh J, Edwards C, Hernandez-Gomez C, Collier J. High energy, high repetition rate, second harmonic generation in large aperture DKDP, YCOB, and LBO crystals. Opt Express 2016; 24:19682-19694. [PMID: 27557246 DOI: 10.1364/oe.24.019682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on type-I phase-matched second harmonic generation (SHG) in three nonlinear crystals: DKDP (98% deuteration), YCOB (XZ plane), and LBO (XY plane), of 8 J, 10 Hz cryogenic gas cooled Yb:YAG laser operating at 1029.5 nm. DKDP exhibited an efficiency of 45% at a peak fundamental intensity of 0.24 GW/cm2 for 10 Hz operation at 10 ns. At the same intensity and repetition rate, YCOB and LBO showed 50% and 65% conversion efficiencies, respectively. Significant improvement in conversion efficiency, to a maximum of 82%, was demonstrated in LBO at 0.7 GW/cm2 and 10 Hz, generating output energy of 5.6 J at 514.75 nm, without damage or degradation. However, no improvement in conversion efficiency was recorded for YCOB at this increased intensity. Additionally, we present theoretically calculated temperature maps for both 10 J and 100 J operation at 10 Hz, and discuss the suitability of these three crystals for frequency conversion of a 100 J, 10 Hz diode pumped solid state laser (DPSSL).
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35
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Bast F, Collier S, Chadha P, Collier J. Septic arthritis of the temporomandibular joint as a complication of acute otitis media in a child: A rare case and the importance of real-time PCR for diagnosis. Int J Pediatr Otorhinolaryngol 2015; 79:1942-5. [PMID: 26340928 DOI: 10.1016/j.ijporl.2015.08.014] [Citation(s) in RCA: 18] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/05/2015] [Accepted: 08/06/2015] [Indexed: 12/21/2022]
Abstract
We document the case of a 7-year-old boy who presented with pain in his left ear and trismus after a diagnosis of acute otitis media one week previously. His blood inflammatory markers were raised and magnetic resonance imaging (MRI) showed significant left temporomandibular joint effusion and partial attenuation of the left mastoid. A clinical diagnosis of septic arthritis of the TMJ was made and the patient was commenced on broad-spectrum antibiotics. Analysis using real time PCR enabled identification of the offending organism, confirmation of the diagnosis and antibiotic treatment to be specifically tailored for treatment.
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Affiliation(s)
- F Bast
- AMEOS Klinikum Haldensleben, Department for Otorhinolaryngology, Haldensleben, Germany
| | - S Collier
- Department of Microbiology, Great Ormond Street Hospital, London, United Kingdom
| | - P Chadha
- Chelsea and Westminster Hospital, Craniofacial Unit, London, United Kingdom.
| | - J Collier
- Chelsea and Westminster Hospital, Craniofacial Unit, London, United Kingdom
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36
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Chadha P, Bast F, Collier J. Dental sinus infections: why are we still missing the well-documented diagnosis? Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.256] [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: 10/22/2022]
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37
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Ryan J, Sgromo B, Magee C, Pavlides M, Ainsworth M, Collier J, Barnes E, Cobbold J. Prevalence of NASH cirrhosis in morbidly obese patients undergoing bariatric surgery. Appetite 2015. [DOI: 10.1016/j.appet.2014.12.158] [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: 10/24/2022]
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38
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Tang Y, Hooker C, Chekhlov O, Hawkes S, Collier J, Rajeev PP. Transmission grating stretcher for contrast enhancement of high power lasers. Opt Express 2014; 22:29363-29374. [PMID: 25606870 DOI: 10.1364/oe.22.029363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We propose, for the first time, a transmission grating stretcher for high power lasers and demonstrate its superiority over conventional, reflective gold grating stretchers in terms of pulse temporal quality. We show that, compared to a conventional stretcher with the same stretching factor, the transmission-grating based stretcher yields more than an order of magnitude improvement in the contrast pedestal. We have also quantitatively characterized the roughness of the grating surfaces and estimated its impact on the contrast pedestal.
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Neely D, Allott R, Bingham B, Collier J, Greenhalgh J, Michaelis M, Phillips J, Phipps CR, McKenna P. Energy coupling in short pulse laser solid interactions and its impact for space debris removal. Appl Opt 2014; 53:I41-I44. [PMID: 25402936 DOI: 10.1364/ao.53.000i41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Significant advances have been made over the last decade to improve the performance, efficiency, and contrast of high peak and average power laser systems, driven by their use in a wide variety of fields, from the industrial to the scientific. As the contrast of the lasers has improved, interactions with contrasts of 1012 are now routinely undertaken. At such high contrasts, there is negligible preplasma formation and the ionized surface layer created by subpicosecond-duration pulses typically forms a highly reflective "plasma mirror" capable of reflecting between 70% and 90% of the incident energy. Although such interactions are of significant interest for applications such as harmonic source production and to enable the underlying physics to be studied, their low absorption can limit their usefulness for applications such as space debris removal.
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Collier J, Tiernan C, Casey N, Evans S, Cogan L. 31 * THE IMPACT OF A REGULAR MULTIDISCIPLINARY MEDICATION REVIEW ON POLYPHARMACY AND PSYCHOTROPIC PRESCRIBING IN CARE HOME RESIDENTS-A FOLLOW-UP STUDY. Age Ageing 2014. [DOI: 10.1093/ageing/afu124.31] [Citation(s) in RCA: 1] [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: 11/12/2022] Open
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41
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Collier J, Aldoohan S, Gill K. SU-E-I-62: Assessing Radiation Dose Reduction and CT Image Optimization Through the Measurement and Analysis of the Detector Quantum Efficiency (DQE) of CT Images Using Different Beam Hardening Filters. Med Phys 2014. [DOI: 10.1118/1.4888012] [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: 11/07/2022] Open
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42
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Gill K, Aldoohan S, Collier J. SU-E-I-57: Evaluation and Optimization of Effective-Dose Using Different Beam-Hardening Filters in Clinical Pediatric Shunt CT Protocol. Med Phys 2014. [DOI: 10.1118/1.4888007] [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: 11/07/2022] Open
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43
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Whelan J, Zhao Y, Collier J. Why food matrices are more potent against cancer as compared to their isolated bioactives (647.39). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.647.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jay Whelan
- NutritionUniversity of TennesseeKnoxvilleTNUnited States
| | - Yi Zhao
- NutritionUniversity of TennesseeKnoxvilleTNUnited States
| | - J. Collier
- NutritionUniversity of TennesseeKnoxvilleTNUnited States
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Taylor MJ, Godlewska B, Near J, Christmas D, Potokar J, Collier J, Klenerman P, Barnes E, Cowen PJ. Effect of interferon-α on cortical glutamate in patients with hepatitis C: a proton magnetic resonance spectroscopy study. Psychol Med 2014; 44:789-795. [PMID: 23659574 PMCID: PMC3758755 DOI: 10.1017/s0033291713001062] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The development of depressive symptomatology is a recognized complication of treatment with the cytokine interferon-α (IFN-α) and has been seen as supporting inflammatory theories of the pathophysiology of major depression. Major depression has been associated with changes in glutamatergic activity and recent formulations of IFN-induced depression have implicated neurotoxic influences that could also lead to changes in glutamate function. The present study used magnetic resonance spectroscopy (MRS) to measure glutamate and its major metabolite glutamine in patients with hepatitis C who received treatment with pegylated IFN-α and ribavirin. METHOD MRS measurements of glutamate and glutamine were taken from a 25 × 20 × 20 mm voxel including the pregenual anterior cingulate cortex in 12 patients before and after 4-6 weeks of treatment with IFN. RESULTS IFN treatment led to an increase in cortical levels of glutamine (p = 0.02) and a significant elevation in the ratio of glutamine to glutamate (p < 0.01). Furthermore, changes in glutamine level correlated significantly with ratings of depression and anxiety at the time of the second scan. CONCLUSIONS We conclude that treatment with IFN-α is associated with MRS-visible changes in glutamatergic metabolism. However, the changes seen differ from those reported in major depression, which suggests that the pathophysiology of IFN-induced depression may be distinct from that of major depression more generally.
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Affiliation(s)
- M J Taylor
- University Department of Psychiatry, Warneford Hospital, Oxford, UK
| | - B Godlewska
- University Department of Psychiatry, Warneford Hospital, Oxford, UK
| | - J Near
- University Department of Psychiatry, Warneford Hospital, Oxford, UK
| | - D Christmas
- Academic Unit of Psychiatry, School of Social and Community Medicine, University of Bristol, UK
| | - J Potokar
- Academic Unit of Psychiatry, School of Social and Community Medicine, University of Bristol, UK
| | | | | | - E Barnes
- NIHR Oxford Biomedical Research Centre, UK
| | - P J Cowen
- University Department of Psychiatry, Warneford Hospital, Oxford, UK
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Yau E, Badal K, Brodeur G, Collier J, Telotte J, Ramakrishnan S. Enzymatic Hydrolysis of N-Methyl Morpholine N-oxide and Ionic Liquid-treated Cellulose: A Comparative Study. Chem Ind 2013. [DOI: 10.1080/00194506.2013.851993] [Citation(s) in RCA: 1] [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: 10/26/2022]
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46
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Mohr NM, Collier J, Hassebroek E, Groth H. Characterizing critical care physician staffing in rural America: a description of Iowa intensive care unit staffing. J Crit Care 2013; 29:194-8. [PMID: 24289882 DOI: 10.1016/j.jcrc.2013.10.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/08/2013] [Accepted: 10/23/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE This study aimed to characterize intensive care unit (ICU) physician staffing patterns in a predominantly rural state. MATERIALS AND METHODS A prospective telephone survey of ICU nurse managers in all Iowa hospitals with an ICU was conducted. RESULTS Of 122 Iowa hospitals, 64 ICUs in 58 (48%) hospitals were identified, and 46 (72%) responded to the survey. Most ICUs (96%) used an open admission model and cared for undifferentiated medical and surgical patients (88%), and only 27% of open ICUs required critical care or pulmonary consultation for admitted patients. Most (59%) Iowa ICUs had a critical care physician or pulmonologist available, and high-intensity staffing was practiced in 30% of ICUs. Most physicians identified as practicing critical care (63%) were not board certified in critical care. Critical care physicians were available in a minority of hospitals routinely for inpatient intubation and cardiac arrest management (29% and 10%, respectively), and emergency physicians and other practitioners commonly responded to emergencies throughout the hospital. CONCLUSIONS Many Iowa hospitals have ICUs, and staffing patterns in Iowa ICUs mirror closely national staffing practices. Most ICUs are multispecialty, open ICUs in community hospitals. These factors should inform training and resource allocation for intensivists in rural states.
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Affiliation(s)
- Nicholas M Mohr
- Department of Emergency Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Division of Critical Care, Department of Anesthesia, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
| | - John Collier
- Department of Emergency Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Elizabeth Hassebroek
- Department of Pulmonary and Critical Care Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Heather Groth
- Department of Emergency Medicine, University of Virginia, PO Box 800699, Charlottesville, VA 22908, USA
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Clifford N, Neal C, Collier J, Brennan P, Avery C. Hot spot maps of the UK detailing the geographical distribution of presentations at the BAOMS annual meetings every two years for a decade (2002–2011). Br J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.bjoms.2013.05.022] [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: 10/26/2022]
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Stepien M, O'Mahony L, O'Sullivan A, Collier J, Fraser WD, Gibney MJ, Nugent AP, Brennan L. Effect of supplementation with vitamin D2-enhanced mushrooms on vitamin D status in healthy adults. J Nutr Sci 2013; 2:e29. [PMID: 25191578 PMCID: PMC4153019 DOI: 10.1017/jns.2013.22] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 07/07/2013] [Accepted: 07/08/2013] [Indexed: 01/05/2023] Open
Abstract
Vitamin D deficiency is emerging worldwide and many studies now suggest its role in the development of several chronic diseases. Due to the low level of vitamin D naturally occurring in food there is a need for supplementation and use of vitamin D-enhanced products. The aim of the present study was to determine if daily consumption of vitamin D2-enhanced mushrooms increased vitamin D status in free-living healthy adults or affected markers of the metabolic syndrome. A total of ninety volunteers (aged 40-65 years) were randomly assigned to one of two 4-week studies: mushroom study (15 µg vitamin D2 or placebo mushroom powder) and capsule study (15 µg vitamin D3 or placebo capsules). Consumption of vitamin D2-enhanced mushrooms increased serum 25-hydroxyvitamin D2 (25(OH)D2) by 128 % from baseline (3·9 (sd 1·9) nmol/l; P < 0·05). Serum 25(OH)D3 increased significantly in the vitamin D3 capsule group (a 55 % increase from a baseline of 44.0 (sd 17·1) nmol/l; P < 0·05). Vitamin D status (25(OH)D) was affected only in the vitamin D3 group. Plasminogen activator inhibitor-1 was lowered by vitamin D2 intake. Vitamin D2 from enhanced mushrooms was bioavailable and increased serum 25(OH)D2 concentration with no significant effect on 25(OH)D3 or total 25(OH)D.
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Affiliation(s)
- Magdalena Stepien
- UCD Institute of Food and Health, University
College Dublin, Belfield, Dublin 4, Republic
of Ireland
- UCD Conway Institute, University College
Dublin, Belfield, Dublin 4, Republic of
Ireland
| | - Louise O'Mahony
- UCD Institute of Food and Health, University
College Dublin, Belfield, Dublin 4, Republic
of Ireland
- UCD Conway Institute, University College
Dublin, Belfield, Dublin 4, Republic of
Ireland
| | - Aifric O'Sullivan
- UCD Institute of Food and Health, University
College Dublin, Belfield, Dublin 4, Republic
of Ireland
- UCD Conway Institute, University College
Dublin, Belfield, Dublin 4, Republic of
Ireland
| | - John Collier
- Monaghan Mushrooms Ireland,
Tyholland, Co. Monaghan, Republic of Ireland
| | - William D. Fraser
- Institute of Aging and Chronic
Disease, Prescot Street, Liverpool L69 3GA,
UK
| | - Michael J. Gibney
- UCD Institute of Food and Health, University
College Dublin, Belfield, Dublin 4, Republic
of Ireland
| | - Anne P. Nugent
- UCD Institute of Food and Health, University
College Dublin, Belfield, Dublin 4, Republic
of Ireland
| | - Lorraine Brennan
- UCD Institute of Food and Health, University
College Dublin, Belfield, Dublin 4, Republic
of Ireland
- UCD Conway Institute, University College
Dublin, Belfield, Dublin 4, Republic of
Ireland
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Fung YL, Tung JP, Foley SR, Simonova G, Thom O, Staib A, Collier J, Dunster KR, Solano C, Shekar K, Chew MS, Fraser JF. Stored blood transfusion induces transient pulmonary arterial hypertension without impairing coagulation in an ovine model of nontraumatic haemorrhage. Vox Sang 2013; 105:150-8. [PMID: 23458181 DOI: 10.1111/vox.12032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 01/21/2013] [Accepted: 01/22/2013] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVES Transfusion of blood products in particular older products is associated with patient morbidity. Previously, we demonstrated a higher incidence of acute lung injury in lipopolysaccharide-treated sheep transfused with stored blood products. As transfusion following haemorrhage is more common, we aimed to determine whether a 'first hit' of isolated haemorrhage would precipitate similar detrimental effects following transfusion and also disrupt haemostasis. MATERIALS AND METHODS Anaesthetized sheep had 33% of their total blood volume collected into Leukotrap bags (Pall Medical), which were processed into packed red blood cells and cross-matched for transfusion into other sheep. After 30 mins, the sheep were resuscitated with either: fresh (<5 days old) or stored (35-42 days old) ovine blood followed by 4% albumin to replacement volume, albumin alone or normal saline alone and monitored for 4 h. RESULTS The first hit of haemorrhage precipitated substantial decreases in mean arterial pressure however haemostasis was preserved. Transfusion of stored ovine blood induced (1) transient pulmonary arterial hypertension but no oedema and (2) reduced fibrinogen levels more than fresh blood, but neither induced coagulopathy. Thus, transfusion of stored blood affected pulmonary function even in the absence of overt organ injury. CONCLUSION The fact that stored blood transfusions: (1) did not induce acute lung injury in contrast to previous lipopolysaccharide-primed animal models identifies the 'first hit' as an important determinant of the severity of transfusion-mediated injury; (2) impaired pulmonary dynamics verifies the sensitivity and vulnerability of the pulmonary system to injury.
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Affiliation(s)
- Y L Fung
- Critical Care Research Group, University of Queensland and The Prince Charles Hospital, Brisbane, QLD, Australia.
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Fairfax BP, Pratap S, Roberts ISD, Collier J, Kaplan R, Meade AM, Ritchie AW, Eisen T, Macaulay VM, Protheroe A. Fatal case of sorafenib-associated idiosyncratic hepatotoxicity in the adjuvant treatment of a patient with renal cell carcinoma. BMC Cancer 2012; 12:590. [PMID: 23231599 PMCID: PMC3575366 DOI: 10.1186/1471-2407-12-590] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Accepted: 11/29/2012] [Indexed: 02/19/2023] Open
Abstract
Background Sorafenib is an orally available kinase inhibitor with activity at Raf, PDGFβ and VEGF receptors that is licensed for the treatment of advanced renal cell carcinoma (RCC) and hepatocellular carcinoma (HCC). Current evidence-based post-nephrectomy management of individuals with localized RCC consists of surveillance-based follow up. The SORCE trial is designed to investigate whether treatment with adjuvant sorafenib can reduce recurrence rates in this cohort. Case presentation Here we report an idiosyncratic reaction to sorafenib resulting in fatal hepatotoxicity and associated renal failure in a 62 year-old man treated with sorafenib within the SORCE trial. Conclusion This is the first reported case of sorafenib exposure associated fatal toxicity in the adjuvant setting and highlights the unpredictable adverse effects of novel adjuvant therapies.
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Affiliation(s)
- B P Fairfax
- Department of Oncology, Cancer and Haematology Centre, Churchill Hospital, Oxford OX3 7LJ, UK
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