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O’Connor R, Matsoso JB, Mashindi V, Mente P, Macheli L, Moreno BD, Doyle BP, Coville NJ, Barrett DH. Catalyst Design: Counter Anion Effect on Ni Nanocatalysts Anchored on Hollow Carbon Spheres. Nanomaterials (Basel) 2023; 13:426. [PMID: 36770387 PMCID: PMC9919602 DOI: 10.3390/nano13030426] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Herein, the influence of the counter anion on the structural properties of hollow carbon spheres (HCS) support was investigated by varying the nickel metal precursor salts applied. TEM and SEM micrographs revealed the dimensional dependence of the HCS shell on the Ni precursor salt, as evidenced by thick (~42 nm) and thin (~23 nm) shells for the acetate and chloride-based salts, respectively. Importantly, the effect of the precursor salt on the textural properties of the HCS nanosupports (~565 m2/gNi(acet)) and ~607 m2/gNiCl), influenced the growth of the Ni nanoparticles, viz for the acetate-(ca 6.4 nm)- and chloride (ca 12 nm)-based salts, respectively. Further, XRD and PDF analysis showed the dependence of the reduction mechanism relating to nickel and the interaction of the nickel-carbon support on the type of counter anion used. Despite the well-known significance of the counter anion on the size and crystallinity of Ni nanoparticles, little is known about the influence of such counter anions on the physicochemical properties of the carbon support. Through this study, we highlight the importance of the choice of the Ni-salt on the size of Ni in Ni-carbon-based nanocatalysts.
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Affiliation(s)
- Ryan O’Connor
- DSI-NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
| | - Joyce B. Matsoso
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
- Department of Inorganic Chemistry, University of Chemistry and Technology in Prague, Dejvice 6, 166 28 Prague 6, Czech Republic
| | - Victor Mashindi
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
| | - Pumza Mente
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
- Institute of Physical Chemistry, Polish Academy of Science, 01-224 Warsaw, Poland
| | - Lebohang Macheli
- Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
| | - Beatriz D. Moreno
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, SK S7N 2V3, Canada
| | - Bryan P. Doyle
- Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
| | - Neil J. Coville
- DSI-NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
| | - Dean H. Barrett
- DSI-NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, WITS, Johannesburg 2050, South Africa
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Vinduska V, Gallops CE, O’Connor R, Wang Y, Huang X. Exosomal Surface Protein Detection with Quantum Dots and Immunomagnetic Capture for Cancer Detection. Nanomaterials (Basel) 2021; 11:1853. [PMID: 34361239 PMCID: PMC8308325 DOI: 10.3390/nano11071853] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 12/29/2022]
Abstract
Exosomes carry molecular contents reflective of parental cells and thereby hold great potential as a source of biomarkers for non-invasive cancer detection and monitoring. However, simple and rapid exosomal molecular detection remains challenging. Here, we report a facile method for exosome surface protein detection using quantum dot coupled with immunomagnetic capture and enrichment. In this method, exosomes were captured by magnetic beads based on CD81 protein expression. Surface protein markers of interest were recognized by primary antibody and then detected by secondary antibody-conjugated quantum dot with fluorescent spectroscopy. Validated by ELISA, our method can specifically detect different surface markers on exosomes from different cancer cell lines and differentiate cancer exosomes from normal exosomes. The clinical potential was demonstrated with pilot plasma samples using HER2-positive breast cancer as the disease model. The results show that exosomes from HER2-positive breast cancer patients exhibited a five times higher level of HER2 expression than healthy controls. Exosomal HER2 showed strong diagnostic power for HER2-positive patients, with the area under the curve of 0.969. This quantum dot-based exosome method is rapid (less than 5 h) and only requires microliters of diluted plasma without pre-purification, practical for routine use for basic vesicle research, and clinical applications.
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Affiliation(s)
| | | | | | | | - Xiaohua Huang
- Department of Chemistry, The University of Memphis, Memphis, TN 38152, USA; (V.V.); (C.E.G.); (R.O.); (Y.W.)
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Breckenridge F, Woldman S, Carney R, Roberts J, O’Connor R. P.90 Impact of coagulation result delays on transfusion practice in major obstetric haemorrhage. Int J Obstet Anesth 2021. [DOI: 10.1016/j.ijoa.2021.103088] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Menzies S, Daly S, O’Connor R, Kelly A, Fitzgerald M, Bourke J, McKenna DB. A re-evaluation of teenage sunbed use following the introduction of banning legislation for under 18-year-olds. J Public Health (Oxf) 2020; 42:588-593. [DOI: 10.1093/pubmed/fdz015] [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] [Received: 07/29/2018] [Revised: 12/26/2018] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
There is little information on the effectiveness of introducing age restriction legislation alone to reduce the rate of sunbed usage by teenagers. Prior to the Public Health (Sunbed) Act of 2014 prohibiting the use of sunbeds in under 18-year-olds in Ireland we reported the rate of sunbed use at 7.5%.
Objectives
The aim of the study was to compare the rate of sunbed usage among Irish teenagers before and after the introduction of banning legislation to determine if it had the desired effect of reducing its rate of use.
Methods
In a cross-sectional survey, students from the same schools as in our previous study completed an anonymous, written questionnaire pertaining to sunbed usage.
Results
In total, 783 questionnaires, from 13 schools across Ireland, were completed. The rate of sunbed use in the current study was 7.2%, compared to 7.5% in the pre-ban study, (P = 0.76). A higher rate of sunbed use was observed in Dublin schools and female public students.
Conclusion
Our study suggests that legislation alone is ineffective at reducing sunbed usage in a teenage population. A multifaceted approach is required that includes enforcement of the legislation together with targeted public education and awareness campaigns using all aspects of the media.
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Affiliation(s)
- S Menzies
- Department of Dermatology, Sligo University Hospital, Sligo, Ireland
| | - S Daly
- Department of Dermatology, Sligo University Hospital, Sligo, Ireland
| | - R O’Connor
- Department of Dermatology, Cork University Hospital, Cork, Ireland
| | - A Kelly
- Department of Dermatology, Cork University Hospital, Cork, Ireland
| | - M Fitzgerald
- Department of Dermatology, Sligo University Hospital, Sligo, Ireland
| | - J Bourke
- Department of Dermatology, Cork University Hospital, Cork, Ireland
| | - D B McKenna
- Department of Dermatology, Sligo University Hospital, Sligo, Ireland
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Hunt S, Kench A, Simonds S, Boyton C, Middleton A, O’Connor R. P383 Exploring the need for enhanced mental health services in a paediatric cystic fibrosis clinic. J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30711-6] [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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O’Connor R, Raywood E, Douglas H, Main E, Pao C. P299 Use of the Polar™ H10 Heart Rate Sensor during the Modified Shuttle Walk Test in children with cystic fibrosis: can we demonstrate maximal response? J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30628-7] [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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Arato M, O’Connor R, Bradbury J, Meltzer H. Ziprasidone in the long-term treatment of negative symptoms and prevention of exacerbation of schizophrenia. Eur Psychiatry 2020. [DOI: 10.1016/s0924-9338(99)80610-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Barnes MC, Donovan JL, Wilson C, Chatwin J, Davies R, Potokar J, Kapur N, Hawton K, O’Connor R, Gunnell D. Seeking help in times of economic hardship: access, experiences of services and unmet need. BMC Psychiatry 2017; 17:84. [PMID: 28253879 PMCID: PMC5335839 DOI: 10.1186/s12888-017-1235-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 02/10/2017] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Economic recessions are often accompanied by increased levels of psychological distress and suicidal behaviour in affected populations. Little is known about the experiences of people seeking help for employment, financial and benefit-related difficulties during recessions. We investigated the experiences of people struggling financially in the aftermath of the Great Recession (2008-9) - including some who had self-harmed - and of the frontline support staff providing assistance. METHODS Interviews were conducted with three groups of people in two cities: i) people who had self-harmed due to employment, financial or benefit concerns (n = 19) ('self-harm'); ii) people who were struggling financially drawn from the community (n = 22), including one focus group) ('community'); iii) and frontline staff from voluntary and statutory sector organisations (e.g., Job Centres, Debt Advice and counselling agencies) providing support services to the groups (n = 25, including 2 focus groups) ('service providers'). Data were analysed using the constant comparison method. RESULTS Service provision was described by people as confusing and difficult to access. The community sample reported considerably more knowledge and access to debt advice than the participants who had self-harmed - although both groups sought similar types of help. The self-harm group exhibited greater expectation that they should be self-reliant and also reported lower levels of informal networks and support from friends and relatives. They had also experienced more difficult circumstances such as benefit sanctions, and most had pre-existing mental health problems. Both self-harm and community groups indicated that practical help for debt and benefit issues would be the most useful - a view supported by service providers - and would have particularly helped those who self-harmed. CONCLUSION Interventions to identify those in need and aid them to access practical, reliable and free advice from support agencies could help mitigate the impact on mental health of benefit, debt and employment difficulties for vulnerable sections of society.
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Affiliation(s)
- M. C. Barnes
- 0000 0004 1936 7603grid.5337.2School of Social and Community Medicine, University of Bristol, Bristol, BS8 2PS UK
| | - J. L. Donovan
- 0000 0004 1936 7603grid.5337.2School of Social and Community Medicine, University of Bristol, Bristol, BS8 2PS UK
| | - C. Wilson
- 0000 0004 1936 7603grid.5337.2School of Social and Community Medicine, University of Bristol, Bristol, BS8 2PS UK
| | - J. Chatwin
- 0000 0004 0460 5971grid.8752.8University of Salford, Salford, UK
| | - R. Davies
- 0000 0004 1936 7603grid.5337.2School of Social and Community Medicine, University of Bristol, Bristol, BS8 2PS UK
| | - J. Potokar
- 0000 0004 1936 7603grid.5337.2School of Social and Community Medicine, University of Bristol, Bristol, BS8 2PS UK
| | - N. Kapur
- 0000000121662407grid.5379.8Centre for Suicide Prevention, University of Manchester, Manchester, UK
| | - K. Hawton
- 0000 0004 1936 8948grid.4991.5Centre for Suicide Research, University of Oxford, Oxford, UK
| | - R. O’Connor
- 0000 0001 2193 314Xgrid.8756.cSuicidal Behaviour Research Laboratory, University of Glasgow, Glasgow, UK
| | - D. Gunnell
- 0000 0004 1936 7603grid.5337.2School of Social and Community Medicine, University of Bristol, Bristol, BS8 2PS UK
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Kirtley O, O’Connor R. Using the integrated motivational-volitional model of suicidal behaviour for suicide prevention. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw169.041] [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: 11/13/2022] Open
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Kwizera EA, Chaffin E, Shen X, Chen J, Zou Q, Wu Z, Gai Z, Bhana S, O’Connor R, Wang L, Adhikari H, Mishra SR, Wang Y, Huang X. Size- and Shape-Controlled Synthesis and Properties of Magnetic-Plasmonic Core-Shell Nanoparticles. J Phys Chem C Nanomater Interfaces 2016; 120:10530-10546. [PMID: 27239246 PMCID: PMC4882128 DOI: 10.1021/acs.jpcc.6b00875] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Magnetic-plasmonic core-shell nanomaterials offer a wide range of applications across science, engineering and biomedical disciplines. However, the ability to synthesize and understand magnetic-plasmonic core-shell nanoparticles with tunable sizes and shapes remains very limited. This work reports experimental and computational studies on the synthesis and properties of iron oxide-gold core-shell nanoparticles of three different shapes (sphere, popcorn and star) with controllable sizes (70 to 250 nm). The nanoparticles were synthesized via a seed-mediated growth method in which newly formed gold atoms were added onto gold-seeded iron oxide octahedrons to form gold shell. The evolution of the shell into different shapes was found to occur after the coalescence of gold seeds, which was achieved by controlling the amount of additive (silver nitrate) and reducing agent (ascorbic acid) in the growth solution. First principles calculation, together with experimental results, elucidated the intimate roles of thermodynamic and kinetic parameters in the shape-controlled synthesis. Both discrete dipole approximation calculation and experimental results showed that the nanopopcorns and nanostars exhibited red-shifted plasmon resonance compared with the nanospheres, with the nanostars giving multispectral feature. This research has made a great step further in manipulating and understanding magnetic-plasmonic hybrid nanostructures and will make important impact in many different fields.
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Affiliation(s)
| | - Elise Chaffin
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Xiao Shen
- Department of Physics and Materials Science, The University of Memphis, Memphis, TN 38152
| | - Jingyi Chen
- Department of Chemistry, University of Arkansas, Fayetteville, AR 72071
| | - Qiang Zou
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831
| | - Zhiming Wu
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831
| | - Zheng Gai
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831
| | - Saheel Bhana
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Ryan O’Connor
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Lijia Wang
- Department of Physics and Materials Science, The University of Memphis, Memphis, TN 38152
| | - Hitesh Adhikari
- Department of Physics and Materials Science, The University of Memphis, Memphis, TN 38152
| | - Sanjay R. Mishra
- Department of Physics and Materials Science, The University of Memphis, Memphis, TN 38152
| | - Yongmei Wang
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Xiaohua Huang
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
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Shipway JR, O’Connor R, Stein D, Cragg SM, Korshunova T, Martynov A, Haga T, Distel DL. Zachsia zenkewitschi (Teredinidae), a Rare and Unusual Seagrass Boring Bivalve Revisited and Redescribed. PLoS One 2016; 11:e0155269. [PMID: 27171209 PMCID: PMC4865151 DOI: 10.1371/journal.pone.0155269] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 04/26/2016] [Indexed: 11/19/2022] Open
Abstract
The sea-grass borer Zachsia zenkewitschi belongs to a group of economically and ecologically important bivalves, commonly referred to as shipworms. The sole recognized representative of the genus Zachsia, this species displays an unusual life history and reproductive strategy that is now understood to include: environmental sex determination of free swimming larvae, extreme sexual and size dimorphism between males and females, internal fertilization, maintenance of often large harems of male dwarfs within a specialized cavity of the female mantle, and complex maternal care of larvae in specialized brood pouches within the gill. It is also the only shipworm species known to burrow in sea grass rhizomes rather than terrestrial wood. Although Z. zenkewitschi is rare and little studied, understanding of its biology and anatomy has evolved substantially, rendering some aspects of its original description inaccurate. Moreover, no existing type specimens are known for this species. In light of these facts, we designate a neotype from among specimens recently collected at the type location, and undertake a re-description of this species, accounting for recent reinterpretation of its life history and functional anatomy.
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Affiliation(s)
- J. R. Shipway
- Ocean Genome Legacy, Marine Science Center, Northeastern University, Nahant, Massachusetts, United States of America
| | - R. O’Connor
- Tufts Medical Centre, Boston, Massachusetts, United States of America
| | - D. Stein
- Ocean Genome Legacy, Marine Science Center, Northeastern University, Nahant, Massachusetts, United States of America
| | - S. M. Cragg
- The Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Portsmouth, P04 9LY, United Kingdom
| | - T. Korshunova
- Koltzov Institute of Developmental Biology RAS, 26 Vavilov St, Moscow, 119334, Russia
| | - A. Martynov
- Zoological Museum, Moscow State University, Bolshaya Nikitskaya St. 6, Moscow, 125009, Russia
| | - T. Haga
- Toyohashi Museum of Natural History, 1–238 Ôana, Ôiwa-chô, Toyohashi, Aichi, 441–3147, Japan
| | - D. L. Distel
- Ocean Genome Legacy, Marine Science Center, Northeastern University, Nahant, Massachusetts, United States of America
- * E-mail:
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O’Connor R, Saleem S, Sidebottom A. Prospective outcome analysis of total temporomandibular joint replacement using the TMJ Concepts system in patients with rheumatological diseases. Br J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.bjoms.2015.08.235] [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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Patel S, O’Connor R, Selbong U, Srinivasan D. Acute renal failure following a bimaxillary osteotomy. Br J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.bjoms.2015.08.164] [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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Schaffalitzky E, Leahy D, Cullen W, Gavin B, Latham L, O’Connor R, Smyth BP, O’Dea E, Ryan S. Youth mental health in deprived urban areas: a Delphi study on the role of the GP in early intervention. Ir J Med Sci 2014; 184:831-43. [DOI: 10.1007/s11845-014-1187-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 08/19/2014] [Indexed: 11/27/2022]
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15
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Hawkeswood JP, O’Connor R, Anton H, Finlayson H. The preparticipation evaluation for athletes with disability. Int J Sports Phys Ther 2014; 9:103-115. [PMID: 24567861 PMCID: PMC3924614] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
BACKGROUND Athletes are routinely assessed medically prior to competition. Although standardized preparticipation examinations (PPEs) are available for able-bodied athletes, the literature lacks any validated equivalent for the athlete with disability (AWD). Since participation and level of competition is increasing in this population, evidence-based tools such as a standardized PPE form should be available for health professionals to assess AWD health and safety. AIM OF THE STUDY To develop an AWD-targeted standardized preparticipation history evaluation (PPE history) using consensus-based expert recommendations. METHODS Researchers developed a PPE history for critical evaluation of its content validity. Structured Delphi method for collecting and interpreting contributions from an expert panel using a series of questionnaires with controlled feedback was performed. Opinions based on the experience of related experts - physiotherapists, sports medicine physicians and physiatrists - were studied during each of the three survey rounds. The process was terminated once adequate consensus relating to the proposed PPE history document was reached. RESULTS Majority consensus was reached for forty-nine of fifty-four items to create a refined ten section AWD-specific document to supplement the current standardized PPE. Modifications were made by researchers to accommodate the five items that did not reach statistical consensus. CONCLUSION Consensus was reached on a variety of AWD-specific PPE items, including the disability-related history and functional review. Equipment issues represent a complex area of evaluation, worthy of future research and discussion. The current proposed PPE history tool is considered comprehensive and ready for application in a clinical setting as an adjunct to existing PPE tools. Injury research in the AWD population will provide guidance for refinement and further validation of this PPE history document. LEVEL OF EVIDENCE 5.
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Affiliation(s)
- Jonathan P. Hawkeswood
- University of British Columbia, Division of Physical Medicine and Rehabilitation; Vancouver, British Columbia
| | - R. O’Connor
- University of British Columbia, Division of Physical Medicine and Rehabilitation; Vancouver, British Columbia
| | - H. Anton
- University of British Columbia, Division of Physical Medicine and Rehabilitation; Vancouver, British Columbia
| | - H. Finlayson
- University of British Columbia, Division of Physical Medicine and Rehabilitation; Vancouver, British Columbia
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O’Connor R, McGurk M. Cost analysis for the European sentinal node trial. Br J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.bjoms.2011.03.177] [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: 11/30/2022]
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17
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O’Connor MB, Hannon MJ, Cagney D, Harrington U, O’Brien F, Hardiman N, O’Connor R, Courtney K, O’Connor C. A study of needle stick injuries among non-consultant hospital doctors in Ireland. Ir J Med Sci 2010; 180:445-9. [DOI: 10.1007/s11845-010-0667-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2007] [Accepted: 12/15/2010] [Indexed: 11/28/2022]
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18
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Dunin-Barkowski W, Lovering A, Orem J, Baekey D, Dick T, Rybak I, Morris K, O’Connor R, Nuding S, Shannon R, Lindsey B. L-plotting—A method for visual analysis of physiological experimental and modeling multi-component data. Neurocomputing 2010. [DOI: 10.1016/j.neucom.2010.03.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fox D, O’Connor R, Mallon P, McMahon G. Development of a single-tube, low-cost, analytical process to extract, separate and determine efavirenz and rifampicin plasma concentrations in HIV/TB co-infected patients. J Int AIDS Soc 2010. [PMCID: PMC3112926 DOI: 10.1186/1758-2652-13-s4-p149] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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20
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Lau CK, O’Connor R, Thompson M, Cameron M. Spare of thought for ACEI. Br J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.bjoms.2009.06.143] [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: 11/25/2022]
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21
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Breyer M, Bollinger M, Farley H, Reed J, O’Connor R. 383. Ann Emerg Med 2006. [DOI: 10.1016/j.annemergmed.2006.07.849] [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: 11/29/2022]
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Bebb DG, Pugh T, Sutcliffe M, Barclay L, Fee J, O’Connor R, Vielkind J, Murray N, Laskin JJ, Marra M. Previously documented mutations in the epidermal growth factor receptor (EGFR) gene in a non-small cell lung cancer (NSCLC) population treated with gefitinib are not associated with response. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.7163] [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: 11/20/2022] Open
Abstract
7163 Background: Mutations in the tyrosine kinase domain of EGFR that may correlate with clinical features and response of NSCLC to EGFR tyrosine kinase inhibitors have been described. But, varying methodologies have contributed to an uncertain relationship between EGFR mutational status and response. This study sought to characterize EGFR mutations in microdissected tumour tissue from pts with advanced NSCLC treated with gefitinib and correlate their clinical data. Methods: Biopsy material from pts treated with gefitinib for advanced NSCLC at the British Columbia Cancer Agency was analyzed. Malignant cells (cytology specimens) or tissue (paraffin embedded biopsies) was reviewed and tumour cells isolated by laser- capture microdissection or manual scrape. Genomic DNA was extracted and exons coding for the EGFR tyrosine kinase domain (18 - 24) were amplified by PCR and sequenced. When insufficient, the priority was 18, 19, 21, followed by 20, 23, 22, and 24. EGFR mutational analyses were correlated with response to gefitinib and clinical features. Results: 61 pts were identified, 14 (23%) radiological responders (CR, PR): 10 Asian, 10 female, 8 non-smokers, 8 adenocarcinoma, 2 BAC. Of 51 tumour samples available, 39 had adequate tissue for sequencing analysis. EGFR copy number by FISH is pending. Laser-capture microdissection allowed for high quality DNA to be extracted almost exclusively from tumour. Exons 18, 19, 20, 21, 22, 23 and 24 have been sequenced in 37, 34, 30, 33, 12, 10, and 13 patients, respectively. 4 mutations were identified: 2 in 2 non-smoking Asian pts (exon 19; deletion or substitution of L747-T751) and 2 in Caucasians (exon 20 point mutation resulting in a L798F substitution). None of these pts had a response to gefitinib. Conclusions: As with other series, most responders were female, non-smokers of Asian origin. Our results support the relationship between Asian ethnicity and EGFR mutations but question the role of EGFR mutational status in predicting response. Prospective studies will need to focus the detection of additional genetic features using accurate and reproducible techniques before recommendations for selecting populations to be treated can be made. No significant financial relationships to disclose.
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Affiliation(s)
- D. G. Bebb
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - T. Pugh
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - M. Sutcliffe
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - L. Barclay
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - J. Fee
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - R. O’Connor
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - J. Vielkind
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - N. Murray
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - J. J. Laskin
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
| | - M. Marra
- Alberta Cancer Board, Calgary, AB, Canada; Michael Smith Genome Sciences Centre, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada
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Meleady R, Clinch D, Meleady R, Bruke CM, O’Doherty A, O’Connor R, Shanahan F, Tormey S. Book review. Ir J Med Sci 2003. [DOI: 10.1007/bf02915261] [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: 11/29/2022]
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Sharida HA, Holohan M, Hogan M, Mathias P, Griffin E, Deasy P, Tempany E, Lambert I, Matthews TG, Clarke TA, Wauer RR, Schmalsisch G, Boye H, Rüstow B, Gaughan B, O’Connor R, Bonnar C, Dalrymple I, Wingfield M, Rasmussen MJ, Turner MJ, Stonge JM, McDonnell M, Burke AG, Murphy JFA, Wauer R, Schmalisch G, Böhme B, Arand J, Moeller C, Jenkins D, Boylan P, McCarthy C, Roberts RN, Quinn AJ, Thompson W, Han KT, Halliday HL, McClure G, Reid MM, McDonald D, Hepper PG, White R, Shahidullah S, Tubman TRJ, Halliday HL, Normand C, Hamilton RA, Dornan JC. Irish perinatal society. Ir J Med Sci 1990. [DOI: 10.1007/bf02937384] [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: 10/21/2022]
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Cooper TK, Traub AI, Magennis SD, Nevin NC, Darzi A, Kelly CJ, Broe PJ, Bouchier-Hayes DJ, McAteer E, O’Reilly G, Haddan DR, Hoey H, Tanner JM, Cox L, Lanigan O, Heffernan A, Chambers J, Kelleher C, Joyce C, Kelly G, Ferriss JB, Sullivan PA, Daly B, O’Connor R, Freyne M, Dineen M, Ritchie CM, Hadden DR, Kennedy AL, Weaver JA, Atkinson AB, Mcllrath E, Clark GE, Sequeira SJ, Cunningham S, Hannon S, McKenna TJ, Smith DF, Smyth PPA, Dalzell G, Kennedy L, Devery R, O’Donnell L, Tomkin GH, Keating JJ, Johnson PJ, Williams R, Loughlin T, Bertagna X, Collins WCJ, Cranny A, Cullen MJ, Feely J, Sheridan B, Dalzell GW, McCormack P, Devlin JG, Redington F, Wickham S, O’Meara N, Collins P, Johnson A. Irish endocrine society. Ir J Med Sci 1986. [DOI: 10.1007/bf02960713] [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: 11/29/2022]
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