1
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Dempsey K, Lindsay M, Tcheng JE, Ian Wong AK. The High Price of Equity in Pulse Oximetry: A cost evaluation and need for interim solutions. medRxiv 2023:2023.09.21.23295939. [PMID: 37790369 PMCID: PMC10543063 DOI: 10.1101/2023.09.21.23295939] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Importance Disparities in pulse oximetry accuracy, disproportionately affecting patients of color, have been associated with serious clinical outcomes. Although many have called for pulse oximetry hardware replacement, the cost associated with this replacement is not known. Objective To estimate the cost of replacing all pulse oximetry hardware throughout a hospital system. Design Single-center survey, 2023. Setting Single center. Participants One academic medical center with three hospitals. Main Outcomes and Measures Cost of fleet replacement as identified by current day prices for hardware. Results New and used prices for 5,079/5,678 (89.5%) across three hospitals for pulse oximetry devices were found. The average equipment cost to replace pulse oximetry hardware is $15,704.12 per bed. Replacement and integration costs are estimated at $28.5-31.8 million for the entire medical system. Extrapolating these costs to 5,564 hospitals in the United States results in an estimated cost of $14.1 billion. Conclusions and Relevance "Simply replacing" pulse oximetry hardware to address disparities may be neither simple, cheap, or timely. Solutions for addressing pulse oximetry accuracy disparities leveraging current technology may be necessary. Trial Registration Pro00113724, exempt.
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Affiliation(s)
- Katelyn Dempsey
- Duke University, Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Durham, NC, USA
| | | | - James E. Tcheng
- Duke University, Department of Medicine, Division of Cardiology, Durham, NC, USA
| | - An-Kwok Ian Wong
- Duke University, Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Durham, NC, USA
- Duke University, Department of Biostatistics and Bioinformatics, Division of Translational Biomedical Informatics, Durham, NC, USA
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2
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Lindsay M. A shared governance approach to nursing documentation redesign using Kotter's change management model. Nurs Manag (Harrow) 2023; 54:14-20. [PMID: 36854001 DOI: 10.1097/01.numa.0000919064.29246.6b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Affiliation(s)
- Mary Lindsay
- Mary Lindsay is the associate chief nursing officer, Heart Services at Duke University Hospital in Durham, N.C. She's also responsible for patient care services departments, Respiratory Therapy, Cardiopulmonary Rehabilitation, and Pulmonary Function Testing Lab
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3
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Lindsay M. Dermod MacCarthy: a paediatric pioneer. Arch Dis Child 2023; 108:240-241. [PMID: 36253070 DOI: 10.1136/archdischild-2022-324595] [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: 06/29/2022] [Accepted: 09/20/2022] [Indexed: 11/03/2022]
Affiliation(s)
- Mary Lindsay
- Children's Centre, Stoke Mandeville Hospital, Aylesbury, UK
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4
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Kester KM, Hatton J, Kelly J, Carroll M, Lindsay M, Jordan N, Fuchs MA, Patel MR, Engel J, Granger B. Moving nursing innovation to prime time through the use of creative partnerships. Nurs Outlook 2022; 70:820-826. [PMID: 36154773 DOI: 10.1016/j.outlook.2022.07.002] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/06/2022] [Accepted: 07/06/2022] [Indexed: 12/14/2022]
Abstract
Nurses are well-positioned to solve many problems in healthcare through engagement in innovation. Support from healthcare organizations to facilitate creative partnerships may accelerate nurses' ability to innovate and improve job satisfaction. The value of creative partnerships is rooted in the diversity of experiences and skillsets of each project team member. While nurses may be content experts and key stakeholders, they often lack experience with project management, information technology, product development, and other important skills. We describe the use of co-creation approaches in creative partnerships with diverse stakeholders to enhance the ability of nurse-led project teams to build valuable and sustainable products or services.
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Affiliation(s)
| | | | - Joe Kelly
- Duke University Hospital, Durham, NC
| | | | | | | | | | | | - Jill Engel
- Duke University Health System, Durham, NC
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Engel JR, Lindsay M, O'Brien S, Granger CB, Moore ES, Hughes T, Parker C, Miller C, Fuchs MA. Health System Redesign of Cardiac Monitoring Oversight to Optimize Alarm Management, Safety, and Staff Engagement. J Nurs Adm 2022; 52:511-518. [PMID: 36095048 DOI: 10.1097/nna.0000000000001192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The purpose of this quality improvement project was to improve health system patient safety by creating a cardiac monitoring structure aligned with national standards. BACKGROUND Excessive alarms pose patient safety threats and are often false or clinically insignificant. The Joint Commission identified reduction of nonactionable alarms as a National Patient Safety Goal. METHODS The conversion to structured monitoring occurred in 4 phases: 1) defining health system monitoring structure and processes; 2) co-create sessions; 3) implementation and impact analysis; and 4) ongoing evaluation and optimization. RESULTS Twenty-two clinical units participated. At the conclusion of phase 4, total 30-day alarm rates decreased by 74% at the academic hospital and by 92% and 95% at the community hospitals and were sustained for 12 months. CONCLUSIONS Decreasing alarm frequency can be safely achieved in academic and community hospitals by creating a system-wide monitoring infrastructure and standardized processes that engage interdisciplinary teams.
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Affiliation(s)
- Jill R Engel
- Author Affiliations: Service Line Vice President - Heart & Vaascular (Dr. Engel), Duke University Health System; Associate Chief Nursing Officer (Dr Lindsay), Heart Services, Duke University Hospital; Nursing Program Manager (Ms O'Brien), Clinical Education and Professional Development, Duke University Health System; Professor of Medicine and Nursing (Dr Granger) and Assistant Professor of Medicine (Dr Moore), Duke University; Senior Director (Ms Hughes), DHTS Clinical Engineering, Duke University Health System; Director of DHTS Clinical Engineering (Mr Parker), Duke University Health System; Strategic Services Associate (Ms Miller), Duke Heart Center of Excellence, Duke University Hospital; Vice President of Patient Care Services and System Chief Nurse Executive (Dr Fuchs), Duke University Health System; and Associate Dean of Clinical Affairs (Dr Fuchs), Duke University School of Nursing, Durham, North Carolina
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6
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Runyan C, Zabner R, Ramzy D, Esmailian F, Emerson D, Megna D, Passano E, Hajj J, Huie N, Lindsay M, Aguillon M, Lam L, Chang D, Kobashigawa J, Moriguchi J, Cole R. Increased Incidence of Cholecystitis with Total Artificial Heart versus Left Ventricular Assist Device. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.053] [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: 12/01/2022] Open
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7
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Sandau K, Williams M, Canakes K, Martinez B, Barone H, Aronow H, Hajj J, Huie N, Lindsay M, Aguillon M, Runyan C, Cole R, Coleman B. Patient Perspectives of Managing Life with a Left Ventricular Assist Device: “I Could Connect How I Felt with What Was Going on.” A Qualitative Analysis. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.082] [Citation(s) in RCA: 1] [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: 11/30/2022] Open
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8
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Coleman B, Williams M, Canakes K, Barone H, Aronow H, Hajj J, Huie N, Lindsay M, Aguillon M, Runyan C, Chang D, Sandau K, Martinez B. Threats to Resilience: How Well are We Preparing Caregivers of Patients Post-Mechanical Circulatory (MCS) Implant to Their Adjustment at Home? J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.087] [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] Open
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9
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Kester KM, Lindsay M, Granger B. Development and evaluation of a prospective staffing model to improve retention. J Nurs Manag 2020; 28:425-432. [PMID: 31891432 DOI: 10.1111/jonm.12945] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 11/25/2019] [Accepted: 12/28/2019] [Indexed: 11/27/2022]
Abstract
AIMS To improve predictability and accuracy of hiring using historical staffing data, quality improvement and workforce engagement. BACKGROUND Twenty-three per cent of newly licensed nurses leave their first job within one year, costing employers $52,100 per nurse replacement. Tools for anticipatory hiring strategies are not available in the literature. METHODS We used retrospective, secondary data analysis to develop a Prospective Staffing Model and conduct a five-year longitudinal evaluation of the implementation of the model in a convenience sample at a quaternary academic Cardiothoracic Intensive Care Unit. We used a team-based, quality improvement approach to restructure recruitment and hiring strategies, standardize new graduate nurse orientation and implement AACN Healthy Work Environment standards. RESULTS Over the five-year prospective evaluation period (2014-2018), 388 nurses were hired and included in the evaluation cohort. Retention increased (n = 286 days) and turnover decreased (17.6%) between 2014 and 2018. Improvements in workforce stability were sustained at five years. CONCLUSIONS Use of a Prospective Staffing Model is associated with improved nurse retention and decreased turnover, and may improve workforce stability. IMPLICATIONS FOR NURSING MANAGEMENT Results suggest that an innovative tool can mitigate the deleterious effects of turnover, adding to current knowledge and providing a method for anticipatory assessment of local turnover.
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Affiliation(s)
- Kelly Marie Kester
- Nurse Manager Cardiothoracic Intensive Care Unit, Duke University Hospital Durham, Durham, NC, USA
| | - Mary Lindsay
- Associate Chief Nursing Officer Heart Services Duke University Hospital Durham, Durham, NC, USA
| | - Bradi Granger
- Duke University School of Nursing and Health System Durham, Durham, NC, USA
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10
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Maznyczka A, McCartney P, Oldroyd KG, McEntegart M, Lindsay M, Eteiba H, Rocchiccioli P, Good R, Shaukat A, Kodoth V, Greenwood J, Robertson K, Cotton J, McConnachie A, Berry C. P2707Invasive coronary physiology during primary percutaneous coronary intervention in patients treated with intracoronary alteplase or placebo: the double-blind T-TIME physiology substudy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.1024] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Impaired microcirculatory reperfusion worsens prognosis post-primary percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI). Intracoronary (IC) alteplase targets persisting thrombus post-reperfusion & distal embolisation. In the T-TIME trial microvascular obstruction on cardiac magnetic resonance (CMR) did not differ with IC alteplase vs placebo.
Purpose
To prospectively determine if index of microcirculatory resistance (IMR) is lower & coronary flow reserve (CFR) or resistive reserve ratio (RRR) are higher (improved) with IC alteplase, & to provide mechanistic insights.
Methods
A pre-planned substudy of the main protocol. From 2016–2017, STEMI patients from 3 UK hospitals ≤6 hrs ischaemic time were randomised in a 1:1:1 dose-ranging, double-blind design. Following standard care reperfusion, alteplase (10 or 20mg) or placebo was infused over 5–10 mins proximal to the culprit lesion pre-stenting. IMR (primary outcome), CFR & RRR (secondary outcomes) were measured in the culprit artery post-PCI. Physiology results were obscured from clinicians acquiring the data, to maintain blinding. CMR was performed 2 days & 3 months post-STEMI. Subgroup analyses were prespecified including by ischaemic time (<2 hours, 2–4 hrs, >4 hrs) & IMR threshold >32.
Results
In 144 patients (mean age 59 yrs, 80% male), IMR, CFR or RRR post-PCI did not differ with alteplase vs placebo (Table). Patients with ischaemic time <2 hrs had a dose related increase in CFR (placebo 1.2 [IQR 1.1–1.7], alteplase 10mg 1.4 [IQR 1.0–1.8], alteplase 20mg 2.0 [IQR 1.8–2.3] p=0.01 for interaction) & RRR (placebo 1.5 [IQR 1.3–1.9], alteplase 10mg 1.6 [1.1–2.2], alteplase 20mg 2.2 [2.0–2.6], p=0.03 for interaction). In subjects with post-PCI IMR>32, % ST-resolution at 60 mins was worse with alteplase 10mg vs placebo (23.1±53.9 vs 50.9±31.5) & in those with IMR≤32% ST-resolution at 60 mins was better with alteplase 20mg vs placebo (68.0±30.7 vs 39.1±43.2), p=0.002 for interaction. The CMR findings in the substudy & overall trial populations were consistent.
Main results Placebo Alteplase 10mg Alteplase 20mg (n=53) (n=41) (n=50) IMR, median (IQR) 33.0 (17.0–57.0) 22.0 (17.0–42.0) 37.0 (20.0–57.8) p=0.15 p=0.78 CFR, median (IQR) 1.3 (1.1–1.8) 1.4 (1.1–1.9) 1.5 (1.1–2.0) p=0.92 p=0.74 RRR, median (IQR) 1.6 (1.3–2.2) 1.6 (1.4–2.6) 1.8 (1.3–2.4) p=0.69 p=0.81 P-values for comparison of alteplase with placebo.
Conclusions
In acute STEMI with ischaemic time ≤6 hrs, IMR, CFR or RRR post-PCI did not differ with alteplase vs placebo. In those with shorter ischaemic times (<2 hrs) CFR & RRR, but not IMR, were improved with alteplase. We observed interactions between alteplase dose, ischaemic time & mechanisms of effect.
Acknowledgement/Funding
Dr Maznyczka is funded by a fellowship from the British Heart Foundation (FS/16/74/32573). T-TIME was funded by grant 12/170/4 from NIHR-EME
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Affiliation(s)
- A Maznyczka
- University of Glasgow, Glasgow, United Kingdom
| | - P McCartney
- University of Glasgow, Glasgow, United Kingdom
| | - K G Oldroyd
- University of Glasgow, Glasgow, United Kingdom
| | - M McEntegart
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - M Lindsay
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - H Eteiba
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - P Rocchiccioli
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - R Good
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - A Shaukat
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - V Kodoth
- Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - J Greenwood
- Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - K Robertson
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - J Cotton
- New Cross Hospital, Wolverhampton, United Kingdom
| | | | - C Berry
- University of Glasgow, Glasgow, United Kingdom
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11
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Rush C, Berry C, Oldroyd K, Rocchiccioli P, Lindsay M, Campbell R, Ford T, Sidik N, Murphy C, Touyz R, Petrie M, McMurray J. 127Prevalence of coronary artery disease and coronary microvascular dysfunction in heart failure with preserved ejection fraction. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0043] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background/Introduction
The prevalence of epicardial coronary artery disease (CAD) and coronary microvascular dysfunction (CMD) have not been studied systematically in an unselected cohort of patients with heart failure and preserved ejection fraction (HFpEF). Both types of coronary disease may play an important role in the pathophysiology and prognosis of HFpEF.
Methods
This prospective multi-centre observational study enrolled near-consecutive patients hospitalized with HFpEF. Patients underwent invasive coronary angiography. Where possible, patients also had guidewire-based assessment of fractional flow reserve, coronary flow reserve (CFR) and index of microcirculatory resistance (IMR) performed, followed by vasoreactivity testing with intracoronary acetylcholine.
Results
A total of 75 patients underwent invasive coronary angiography. Guidewire-based assessment of FFR/CFR/IMR was performed in 62 patients, and vasoreactivity testing was possible in 41 patients. Obstructive epicardial CAD was identified in 38 patients (51%). CMD (defined as a CFR <2.0 and/or IMR ≥25) was present in 66% of patients assessed and was similarly prevalent in those with and without obstructive epicardial disease (62% vs. 69%, p 0.52). During vasoreactivity testing, 24% of those assessed had evidence of coronary microvascular endothelial dysfunction. Patients with obstructive CAD were more often male (63% vs. 38%, p 0.028), and had a history of CAD (50% vs. 19%, p 0.005), diabetes mellitus (63% vs. 41%, p 0.05), and a higher E/e' on echocardiography (median 14.4 vs. 12.3, p 0.044) than those without obstructive coronary disease. Patients with CMD had higher B-type natriuretic peptide levels (median 569 vs. 197 pg/ml, p 0.036) than those without microvascular dysfunction.
Selected baseline characteristics No obstructive CAD (n=37) Obstructive CAD (n=38) p-value No CMD (n=21) CMD (n=41) p-value Age (mean, years) 72 73 0.4 74 72 0.41 Female, n (%) 23 (62%) 14 (37%) 0.028 11 (52%) 22 (54%) 0.92 CAD history, n (%) 7 (19%) 19 (50%) 0.005 7 (33%) 12 (29%) 0.74 Diabetes mellitus, n (%) 15 (41%) 24 (63%) 0.05 11 (52%) 22 (54%) 0.92 BNP (median, pg/ml) 323 315 0.9 197 569 0.036 Ejection fraction (median, %) 59 58 0.35 60 56 0.064 E/e' (median) 12.3 14.4 0.044 14.2 12.4 0.74
Study flow diagram
Conclusion
Both epicardial CAD and CMD are common in HFpEF and each may be a therapeutic target in this condition. Although it has been hypothesized that CMD may be due to endothelial dysfunction, our findings suggest that CMD is predominantly due to structural abnormalities in HFpEF.
Acknowledgement/Funding
Chief Scientist Office
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Affiliation(s)
- C Rush
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - C Berry
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - K Oldroyd
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - P Rocchiccioli
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - M Lindsay
- Golden Jubilee National Hospital, Glasgow, United Kingdom
| | - R Campbell
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - T Ford
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - N Sidik
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - C Murphy
- Royal Alexandra Hospital, Paisley, United Kingdom
| | - R Touyz
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - M Petrie
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
| | - J McMurray
- University of Glasgow, BHF Glasgow Cardiovascular Research Centre, Glasgow, United Kingdom
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12
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Yip C, Goia C, Botly L, Hill M, Casaubon L, Mulvagh S, Martin-Rhee M, Lindsay M. UNDERSTANDING RELATIONSHIPS IN TEMPORAL TRENDS OF HOSPITALIZATIONS FOR CARDIOVASCULAR DISEASES, STROKE AND VASCULAR COGNITIVE IMPAIRMENT FROM 2007 TO 2017. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.446] [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: 11/28/2022] Open
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13
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Cacciottolo TM, Perikari A, van der Klaauw A, Henning E, Stadler LKJ, Keogh J, Farooqi IS, Tenin G, Keavney B, Ryan E, Budd R, Bewley M, Coelho P, Rumsey W, Sanchez Y, McCafferty J, Dockrell D, Walmsley S, Whyte M, Liu Y, Choy MK, Tenin G, Abraham S, Black G, Keavney B, Ford T, Stanley B, Good R, Rocchiccioli P, McEntegart M, Watkins S, Eteiba H, Shaukat A, Lindsay M, Robertson K, Hood S, McGeoch R, McDade R, Sidik N, McCartney P, Corcoran D, Collison D, Rush C, McConnachie A, Touyz R, Oldroyd K, Berry C, Gazdagh G, Diver L, Marshall J, McGowan R, Ahmed F, Tobias E, Curtis E, Parsons C, Maslin K, D'Angelo S, Moon R, Crozier S, Gossiel F, Bishop N, Kennedy S, Papageorghiou A, Fraser R, Gandhi S, Prentice A, Inskip H, Godfrey K, Schoenmakers I, Javaid MK, Eastell R, Cooper C, Harvey N, Watt ER, Howden A, Mirchandani A, Coelho P, Hukelmann JL, Sadiku P, Plant TM, Cantrell DA, Whyte MKB, Walmsley SR, Mordi I, Forteath C, Wong A, Mohan M, Palmer C, Doney A, Rena G, Lang C, Gray EH, Azarian S, Riva A, Edwards H, McPhail MJW, Williams R, Chokshi S, Patel VC, Edwards LA, Page D, Miossec M, Williams S, Monaghan R, Fotiou E, Santibanez-Koref M, Keavney B, Badat M, Mettananda S, Hua P, Schwessinger R, Hughes J, Higgs D, Davies J. Scientific Business Abstracts of the 113th Annual Meeting of the Association of Physicians of Great Britain and Ireland. QJM 2019; 112:724-729. [PMID: 31505685 DOI: 10.1093/qjmed/hcz175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - A Perikari
- University of Cambridge Metabolic Research Laboratories
| | | | - E Henning
- University of Cambridge Metabolic Research Laboratories
| | - L K J Stadler
- University of Cambridge Metabolic Research Laboratories
| | - J Keogh
- University of Cambridge Metabolic Research Laboratories
| | - I S Farooqi
- University of Cambridge Metabolic Research Laboratories
| | - G Tenin
- From University of Manchester
| | | | - E Ryan
- Department of Respiratory Medicine, Centre for Inflammation Research, University of Edinburgh
| | - R Budd
- Department of Infection Immunity and Cardiovascular Disease, The Florey Institute for Host-Pathogen Interactions, University of Sheffield
| | - M Bewley
- Department of Infection Immunity and Cardiovascular Disease, The Florey Institute for Host-Pathogen Interactions, University of Sheffield
| | - P Coelho
- Department of Respiratory Medicine, Centre for Inflammation Research, University of Edinburgh
| | - W Rumsey
- Stress and Repair Discovery Performance Unit, Respiratory Therapy Area
| | - Y Sanchez
- Stress and Repair Discovery Performance Unit, Respiratory Therapy Area
| | - J McCafferty
- Department of Respiratory Medicine, Centre for Inflammation Research, University of Edinburgh
| | - D Dockrell
- Department of Respiratory Medicine, Centre for Inflammation Research, University of Edinburgh
| | - S Walmsley
- Department of Respiratory Medicine, Centre for Inflammation Research, University of Edinburgh
| | - M Whyte
- Department of Respiratory Medicine, Centre for Inflammation Research, University of Edinburgh
| | - Y Liu
- From the University of Manchester
| | - M-K Choy
- From the University of Manchester
| | - G Tenin
- From the University of Manchester
| | | | - G Black
- From the University of Manchester
| | | | - T Ford
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | | | - R Good
- Golden Jubilee National Hospital
| | - P Rocchiccioli
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - M McEntegart
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | | | - H Eteiba
- Golden Jubilee National Hospital
| | | | | | | | - S Hood
- Golden Jubilee National Hospital
| | | | - R McDade
- Golden Jubilee National Hospital
| | - N Sidik
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - P McCartney
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - D Corcoran
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - D Collison
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - C Rush
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | | | - R Touyz
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
| | - K Oldroyd
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - Colin Berry
- BHF Centre of Excellence in Vascular Science and Medicine, University of Glasgow
- Golden Jubilee National Hospital
| | - G Gazdagh
- School of Medicine, Dentistry & Nursing, College of Medical, Veterinary and Life Sciences, University of Glasgow
| | - L Diver
- West of Scotland Regional Genetics Service, Laboratory Medicine Building, Queen Elizabeth University Hospital
| | - J Marshall
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow
| | - R McGowan
- West of Scotland Regional Genetics Service, Laboratory Medicine Building, Queen Elizabeth University Hospital
| | - F Ahmed
- Developmental Endocrinology Research Group, Royal Hospital for Children, University of Glasgow
| | - E Tobias
- Academic Unit of Medical Genetics and Clinical Pathology, Laboratory Medicine Building, Queen Elizabeth University Hospital, University of Glasgow
| | - E Curtis
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - C Parsons
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - K Maslin
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - S D'Angelo
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - R Moon
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - S Crozier
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - F Gossiel
- Academic Unit of Bone Metabolism, University of Sheffield
| | - N Bishop
- Academic Unit of Child Health, University of Sheffield
| | - S Kennedy
- Nuffield Department of Women's & Reproductive Health, John Radcliffe Hospital, University of Oxford
| | - A Papageorghiou
- Nuffield Department of Women's & Reproductive Health, John Radcliffe Hospital, University of Oxford
| | - R Fraser
- Department of Obstetrics and Gynaecology, Sheffield Hospitals NHS Trust, University of Sheffield
| | - S Gandhi
- Department of Obstetrics and Gynaecology, Sheffield Hospitals NHS Trust, University of Sheffield
| | | | - H Inskip
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - K Godfrey
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - I Schoenmakers
- Department of Medicine, Faculty of Medicine and Health Sciences, University of East Anglia
| | - M K Javaid
- NIHR Oxford Biomedical Research Centre, University of Oxford
| | - R Eastell
- Academic Unit of Bone Metabolism, University of Sheffield
| | - C Cooper
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | - N Harvey
- MRC Lifecourse Epidemiology Unit, University of Southampton
| | | | - A Howden
- School of Life Sciences, University of Dundee
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - E H Gray
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
| | - S Azarian
- Institute of Hepatology, Foundation for Liver Research
| | - A Riva
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
| | - H Edwards
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
| | - M J W McPhail
- School of Immunology and Microbial Sciences, King's College London
- Institute of Liver Studies & Transplantation, King's College Hospital
| | - R Williams
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
| | - S Chokshi
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
| | - V C Patel
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
- Institute of Liver Studies & Transplantation, King's College Hospital
| | - L A Edwards
- Institute of Hepatology, Foundation for Liver Research
- School of Immunology and Microbial Sciences, King's College London
| | - D Page
- University of Manchester
- Manchester Metropolitan University
| | - M Miossec
- Manchester Metropolitan University
- University of Newcastle
| | | | | | | | | | | | - M Badat
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital
| | - S Mettananda
- Department of Paediatrics, Faculty of Medicine, University of Kelaniya
| | - P Hua
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital
| | - R Schwessinger
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital
| | - J Hughes
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital
| | - D Higgs
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital
| | - J Davies
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital
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Barone H, Olman M, Fishman A, Olanisa L, Runyan C, Hajj J, Huie N, Lindsay M, Passano E, Kobashigawa J, Moriguchi J, Cole R, Esmailian F, Chung J, Ramzy D. The Value of Licensed Clinical Social Worker Pre-Implant Assessment in Predicting Non-Compliance in Durable Mechanical Circulatory Support Device Patients. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.219] [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: 10/27/2022] Open
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15
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Coleman B, Levine R, Arabia F, Passano E, Dimbil S, Barone H, Runyan C, Huie N, Hajj J, Lindsay M, Kobashigawa J. Is the VAS Quality of Life Assessment Tool Sensitive to Both Male and Female MCSD Patients? J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.761] [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] Open
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Brown J, Barr O, Lindsay M, Ennis E, O'Neill S. Facilitation of child health research in hospital settings: The views of nurses. J Clin Nurs 2018; 27:1004-1014. [PMID: 28926150 DOI: 10.1111/jocn.14079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 09/11/2017] [Indexed: 11/28/2022]
Abstract
AIMS AND OBJECTIVES To explore the views of nurses towards child health research and to identify factors influencing their willingness to facilitate it in practice. BACKGROUND Child health research in clinical practice is increasing throughout the UK. Nurses and midwives facilitate access to patients, enact research study protocols and have a critical role in parental decisions to enrol children into research studies. Little is known about their perception of this process. DESIGN This study was a descriptive study design. METHODS A newly designed questionnaire was completed in 2013 by 105 nurses in three neonatal and two children's units in two discrete acute hospital sites. RESULTS Overwhelming support for clinical research was reported. Participants were motivated to facilitate research in order to improve patient care and contribute to the evidence base, but discouraged by external organisational factors and ethical concerns. Training, education and a dedicated team to support research were considered important. Misconceptions regarding consent and the allocation of treatment were reported. Participants raised particular concerns about trials of investigational medicinal product. CONCLUSION Negative views of nurses towards research, combined with a lack of knowledge of research processes, governance and ethics, have the potential to threaten the success of clinical research studies. RELEVANCE TO CLINICAL PRACTICE Focus on three main areas: staff education, improved communication and the demonstration of managerial commitment to clinical research.
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Affiliation(s)
- Julie Brown
- School of Nursing, Ulster University, Londonderry, UK
| | - Owen Barr
- School of Nursing, Ulster University, Londonderry, UK
| | - Mary Lindsay
- School of Nursing, Ulster University, Londonderry, UK
| | - Edel Ennis
- School of Psychology, Ulster University, Londonderry, Coleraine, UK
| | - Siobhan O'Neill
- School of Psychology, Ulster University, Londonderry, Coleraine, UK
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Lindsay M. I sit in the Diabetic Clinic. Arch Dis Child Educ Pract Ed 2017; 102:282-284. [PMID: 29162662 DOI: 10.1136/archdischild-2017-313031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 10/04/2017] [Indexed: 11/03/2022]
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Jadon D, Sengupta R, Nightingale A, Lindsay M, Lu H, Jobling A, Dunphy J, Korendowych E, Elder J, Nair R, Shaddick G, McHugh N. THU0391 Axial Disease in Psoriatic Arthritis () Study: Serum-Soluble Bone-Turnover Biomarkers of Psoriatic Arthritis Phenotypes. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2761] [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: 11/03/2022]
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19
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Mackey JR, Pieńkowski T, Crown J, Sadeghi S, Martin M, Chan A, Saleh M, Sehdev S, Provencher L, Semiglazov V, Press MF, Sauter G, Lindsay M, Houé V, Buyse M, Drevot P, Hitier S, Bensfia S, Eiermann W. Long-term outcomes after adjuvant treatment of sequential versus combination docetaxel with doxorubicin and cyclophosphamide in node-positive breast cancer: BCIRG-005 randomized trial. Ann Oncol 2016; 27:1041-1047. [PMID: 26940688 DOI: 10.1093/annonc/mdw098] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 02/16/2016] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The optimal regimen for adjuvant breast cancer chemotherapy is undefined. We compared sequential to concurrent combination of doxorubicin and cyclophosphamide with docetaxel chemotherapy in women with node-positive non-metastatic breast cancer. We report the final, 10-year analysis of disease-free survival (DFS), overall survival (OS), and long-term safety. PATIENTS AND METHODS A total of 3298 women with HER2 nonamplified breast cancer were randomized to doxorubicin and cyclophosphamide every 3 weeks for four cycles followed by docetaxel (AC → T) every 3 weeks for four cycles or docetaxel, doxorubicin, and cyclophosphamide (TAC) every 3 weeks for six cycles. The patients received standard radiotherapy and endocrine therapy and were followed up for 10 years with annual clinical evaluation and mammography. RESULTS The 10-year DFS rates were 66.5% in the AC → T arm and 66.3% in the TAC arm (P = 0.749). OS was 79.9% in the AC → T arm and 78.9% in the TAC arm (P = 0.506). TAC was associated with higher rates of febrile neutropenia, although G-CSF primary prophylaxis greatly reduced this risk. AC → T was associated with a higher rate of myalgia, hand-foot syndrome, fluid retention, and sensory neuropathy. CONCLUSION This 10-year analysis of the BCIRG-005 trial confirmed that the efficacy of TAC was not superior to AC → T in women with node-positive early breast cancer. The toxicity profiles differ between arms and were consistent with previous reports. The TAC regimen with G-CSF support provides shorter adjuvant treatment duration with less toxicity. TRIAL REGISTRATION ClinicalTrials.gov Identifier NCT00312208.
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Affiliation(s)
- J R Mackey
- Department of Oncology, Cross Cancer Institute, Edmonton, Canada.
| | - T Pieńkowski
- Department of Oncology, Postgraduate Medical Education Centre, Warsaw, Poland
| | - J Crown
- All-Ireland Co-Operative Oncology Research Group, Dublin City University, Dublin, Ireland
| | - S Sadeghi
- Department of Oncology, University of California, Los Angeles, USA
| | - M Martin
- Department of Oncology, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - A Chan
- Breast Cancer Research Centre, WA & Curtin University, Perth, Australia
| | - M Saleh
- Department of Oncology, University of Alabama Comprehensive Cancer Center, Birmingham, USA
| | - S Sehdev
- Department of Oncology, William Osler Health Center, Brampton Civic Hospital, Brampton
| | - L Provencher
- Department of Oncology, CHU de Québec/Université Laval, Québec, Canada
| | - V Semiglazov
- Department of Oncology, Research Institute of Oncology N.N. Petrov Rosmedtechnologiy, St Petersburg, Russian Federation
| | - M F Press
- Department of Pathology, University of Southern California, Los Angeles, USA
| | - G Sauter
- Department of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - M Lindsay
- Translational Research in Oncology, Edmonton, Canada
| | - V Houé
- Translational Research in Oncology, Paris, France
| | - M Buyse
- Biostatistics, International Drug Development Institute Statistics, Leuven, Belgium
| | - P Drevot
- Translational Research in Oncology, Paris, France
| | - S Hitier
- Clinical Studies, Sanofi, Paris, France
| | - S Bensfia
- Clinical Studies, Sanofi, Paris, France
| | - W Eiermann
- Gynecology and Obstetrics, Isarklinikum & IOZ, Munich, Germany
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Carberry J, Carrick D, Haig C, Rauhalammi S, Ahmed N, Mordi I, McEntegart M, Petrie MC, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Ford I, Radjenovic A, Oldroyd KG, Berry C. 12 The influence of microvascular obstruction on the relationship between remote zone extracellular volume and subsequent left ventricular volumes in survivors of ST-elevation myocardial infarction. Heart 2015. [DOI: 10.1136/heartjnl-2015-308734.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi S, Ahmed N, Mordi I, McEntegart M, Petrie MC, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Ford I, Radjenovic A, Oldroyd KG, Berry C. 13 Natural history and clinical significance of infarct zone extracellular volume and remodelling in survivors of acute STEMI. Heart 2015. [DOI: 10.1136/heartjnl-2015-308734.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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22
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Lindsay M. Anthony John Chetwynd Balfour. Assoc Med J 2015. [DOI: 10.1136/bmj.h5009] [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: 11/03/2022]
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Carrick DJA, Haig C, Ahmed N, Eteiba H, McEntegart M, Watkins S, Lindsay M, Radjenovic A, Oldroyd KG, Berry C. 8 Myocardial haemorrhage after acute reperfused st-elevation myocardial infarction: temporal evolution, relation to microvascular obstruction and prognostic significance. Heart 2015. [DOI: 10.1136/heartjnl-2015-307845.8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Carberry J, Carrick D, Haig C, Rauhalammi SM, Ahmed N, Mordi I, McEntegart M, Petrie M, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Radjenovic A, Ford I, Oldroyd KG, Berry C. 4 Extracellular volume in the infarct zone is associated with clinical and mri measures of infarct severity in survivors of acute stemi: Abstract 4 Table 1. Heart 2015. [DOI: 10.1136/heartjnl-2015-307845.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi SM, Ahmed N, Mordi I, McEntegart M, Petrie M, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Radjenovic A, Ford I, Oldroyd KG, Berry C. 5 Relationships between infarct zone extracellular volume and clinical measures of ischaemia and reperfusion in acute STEMI survivors: Abstract 5 Table 1. Heart 2015. [DOI: 10.1136/heartjnl-2015-307845.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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26
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Layland J, Carrick D, Nerlekar N, Ahmed N, Lindsay M, Oldroyd K, Berry C. The resistive reserve ratio predicts acute infarct characteristics in patients with STEMI. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.458] [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: 11/17/2022]
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27
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Hamann P, Heward J, McHugh N, Lindsay M. OP0139 Next Generation Sequencing Analysis of the Transcriptome in Muscle Obtained from Anti-JO 1 Positive Idiopathic Inflammatory Myositis and Inclusion Body Myositis: A Pilot Study. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.344] [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: 11/03/2022]
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Abstract
This research investigates how individuals who reenter society from prison use coping strategies. Participants are incarcerated individuals who recidivated following a previous release from prison (n = 20). Participants examine their most recent reentry experience via an interview. The research question under investigation is, "What themes describe how individuals cope with reentry from prison to society?" Data and results combine qualitative and quantitative analysis methods. The predominant coping strategy for dealing with reentry barriers is avoidance. There is a defined process experienced by participants, which is initial optimism about release, followed by craving substances, facing practical barriers, and/or feeling overwhelmed. This eventually results in avoidance of managing problems and emotions and substance abuse relapse, which culminates in recidivism.
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Gardner H, Nuciforo P, Liu W, Lee B, Rheinhardt J, Barrett C, Linnartz R, Dugan M, Eiermann W, Pienkowski T, Martin M, Robert N, Forbes J, Buyse M, Finn R, Lindsay M, Slamon D, Press M. PI3 Kinase Pathway Analysis in Tissue Microarrays Using Laser Capture Microdissection and Immunohistochemistry. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-4043] [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: 11/16/2022]
Abstract
Abstract
Background. During the performance of the BCIRG trials primary patient tumor samples were obtained from paraffin blocks and assembled into 15 tissue microarrays, including 3000 samples from trial 005 (adjuvant taxol in Her2- node positive patients), 2200 in 006 (adjuvant herceptin in Her2+ high risk patients) and 300 in 007 (addition of platinum in Her2+ first line therapy). This array set was prepared prospectively, in anticipation of molecular epidemiologic studies of a variety of targets in relation to outcome. In order to address the potentially important role of the PIK3CA pathway in modulating outcome in different clinical situations we assessed components of the PIK3CA pathway by various methods.Methods. We analysed the expression of PTEN, Cyclin D1, p53 and Stathmin by immunohistochemistry using standard methods. All markers were scored by histoscore. Phospho S6 240 and phospho Akt 473 were assessed simultaneously by quantum dot immunofluorescence using automated image capture and segmentation. PIK3CA mutations were evaluated using SnaPshot analysis of laser captured TMA spots in a subset of approximately 2000 samples.Results. In the samples analyzed PIK3CA mutation had an incidence of 23%, with 9% being mutations in exon 9 and 13% in exon 20, with 0.5% being mutant in both exons. Initial analysis of the results prior to outcome analysis indicated that Stathmin expression, while being a robust marker with good dynamic range, did not appear to correlate with PTEN loss by IHC or with PIK3CA mutation.Conclusions. PIK3CA mutational analysis is feasible from TMA cores and gives mutation incidences similar to the published literature for archival material. Relationships of markers with outcome will be presented.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 4043.
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Affiliation(s)
- H. Gardner
- 1Novartis Institutes for Biomedical Research, MA,
| | | | - W. Liu
- 1Novartis Institutes for Biomedical Research, MA,
| | - B. Lee
- 1Novartis Institutes for Biomedical Research, MA,
| | | | - C. Barrett
- 1Novartis Institutes for Biomedical Research, MA,
| | | | | | | | | | | | | | | | - M. Buyse
- 9International Drug Development Institute, Belgium
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Lindsay M. Comments on the article “Changing attitudes towards the care of children in hospital: a new assessment of the influence of the work of Bowlby and Robertson in the UK, 1940–1970” by Frank C.P. van der Horst and Rene van der Veer (Attachment and Human Development Vol 11, No 2, March 2009, 119–142). Attach Hum Dev 2009; 11:563-7. [DOI: 10.1080/14616730903282506] [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: 10/20/2022]
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31
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Chalmers C, Lindsay M, Usher D, Warner P, Evans D, Ferguson M. Hysterectomy and ovarian function: levels of follicle stimulating hormone and incidence of menopausal symptoms are not affected by hysterectomy in women under age 45 years. Climacteric 2009. [DOI: 10.1080/cmt.5.4.366.373] [Citation(s) in RCA: 9] [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] [Indexed: 10/20/2022]
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Patel RK, Mark PB, Johnston N, McGeoch R, Lindsay M, Kingsmore DB, Dargie HJ, Jardine AG. Prognostic value of cardiovascular screening in potential renal transplant recipients: a single-center prospective observational study. Am J Transplant 2008; 8:1673-83. [PMID: 18510627 DOI: 10.1111/j.1600-6143.2008.02281.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We assessed the outcome of pretransplant cardiac assessment in a single center. Three hundred patients with end-stage renal disease underwent electrocardiogram, Bruce exercise testing (ETT) and ventricular assessment by cardiac MRI. Patients with high index of suspicion of coronary artery disease (CAD) underwent coronary angiography and percutaneous coronary intervention (PCI) if indicated. Two hundred and twenty-two patients were accepted onto the renal transplant waiting list; 80 patients were transplanted during the follow-up period and 60 died (7 following transplantation). Successful transplantation was associated with improved survival (mean survival 4.5 +/- 0.6 years vs. listed not transplanted 4.1 +/- 1.4 years vs. not listed 3.1 +/- 1.7 years; p < 0.001). Ninety-nine patients underwent coronary angiography; 65 had normal or low-grade CAD and 34 obstructive CAD. Seventeen patients (5.6%) were treated by PCI. There was no apparent survival difference between patients who underwent PCI or coronary artery bypass graft compared to those who underwent angiography without intervention or no angiography (p = 0.67). Factors associated with nonlisting for renal transplantation included burden of preexisting cardiovascular disease, poor exercise tolerance and severity of CAD. Pretransplant cardiovascular screening provides prognostic information and information that can be used to restrict access to transplantation. However, if the aim is to identify and treat CAD, the benefits are far from clear.
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Affiliation(s)
- R K Patel
- Department of Cardiology, Western Infirmary, Glasgow, UK
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Patel RK, Mark PB, Johnston N, McGeoch R, Lindsay M, Kingsmore DB, Dargie HJ, Jardine AG. Prognostic value of cardiovascular screening in potential renal transplant recipients: a single-center prospective observational study. Am J Transplant 2008. [PMID: 18510627 DOI: 10.1111/j.1600-6143.2008.02281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We assessed the outcome of pretransplant cardiac assessment in a single center. Three hundred patients with end-stage renal disease underwent electrocardiogram, Bruce exercise testing (ETT) and ventricular assessment by cardiac MRI. Patients with high index of suspicion of coronary artery disease (CAD) underwent coronary angiography and percutaneous coronary intervention (PCI) if indicated. Two hundred and twenty-two patients were accepted onto the renal transplant waiting list; 80 patients were transplanted during the follow-up period and 60 died (7 following transplantation). Successful transplantation was associated with improved survival (mean survival 4.5 +/- 0.6 years vs. listed not transplanted 4.1 +/- 1.4 years vs. not listed 3.1 +/- 1.7 years; p < 0.001). Ninety-nine patients underwent coronary angiography; 65 had normal or low-grade CAD and 34 obstructive CAD. Seventeen patients (5.6%) were treated by PCI. There was no apparent survival difference between patients who underwent PCI or coronary artery bypass graft compared to those who underwent angiography without intervention or no angiography (p = 0.67). Factors associated with nonlisting for renal transplantation included burden of preexisting cardiovascular disease, poor exercise tolerance and severity of CAD. Pretransplant cardiovascular screening provides prognostic information and information that can be used to restrict access to transplantation. However, if the aim is to identify and treat CAD, the benefits are far from clear.
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Affiliation(s)
- R K Patel
- Department of Cardiology, Western Infirmary, Glasgow, UK
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Affiliation(s)
- M Lindsay
- Biochemical and Travis Laboratories, Medical School, University of Otago, New Zealand
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Lindsay M, Lee A, Chan K, Poon P, Han LK, Wong WCW, Wong S. Does pulmonary rehabilitation give additional benefit over tiotropium therapy in primary care management of chronic obstructive pulmonary disease? Randomized controlled clinical trial in Hong Kong Chinese. J Clin Pharm Ther 2005; 30:567-73. [PMID: 16336289 DOI: 10.1111/j.1365-2710.2005.00686.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To evaluate whether multidisciplinary pulmonary rehabilitation programme (PRP) provides additional benefit over tiotropium therapy in managing chronic obstructive pulmonary disease (COPD) in primary care. DESIGN A randomized controlled trial to analyse the difference in outcomes of COPD patients receiving tiotropium plus PRP vs. tiotropium treatment alone. SETTING Two primary care teaching clinics affiliated with a university which serves a population of 600,000. PARTICIPANTS Fifty primary care COPD patients. METHODS Fifty subjects underwent spirometry and their status of COPD was confirmed by using the Vitalograph Gold Standard. They were then assessed by the 6-min walking distance (6MWD), Peak Visual Analogue Scale (Peak VAS) and Chronic Respiratory Disease Questionnaire (CRQ). All subjects were given tiotropium to optimize their treatment. After a 6-week period, half were randomized to the intervention group (i.e. receiving PRP), whereas the rest were randomized to control group which received only medication. Spirometry, 6MWD, Peak VAS and CRQ were performed in both groups at 6 weeks, 12 weeks and 3 months. OUTCOMES Spirometry, 6MWD, Peak VAS and CRQ. RESULTS Significant improvement (P < 0.05) was seen in 6MWD, symptoms of dyspnoea measured by Peak VAS and CRQ. The improvement was sustained at 3-month follow-up. However, no additional significant improvement was seen in the intervention group when compared with control. CONCLUSION Tiotropium therapy has improved health outcomes in COPD patients in primary care settings. A 6 weekly PRP did not give any additional benefits in patients already given tiotropium.
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Affiliation(s)
- M Lindsay
- Family Medicine Unit, Department of Community and Family Medicine, The Chinese University of Hong Kong
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Konstantinov K, Bewlay S, Wang G, Lindsay M, Wang J, Liu H, Dou S, Ahn JH. New approach for synthesis of carbon-mixed LiFePO4 cathode materials. Electrochim Acta 2004. [DOI: 10.1016/j.electacta.2004.05.049] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [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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Chalmers C, Lindsay M, Usher D, Warner P, Evans D, Ferguson M. Hysterectomy and ovarian function: levels of follicle stimulating hormone and incidence of menopausal symptoms are not affected by hysterectomy in women under age 45 years. Climacteric 2002; 5:366-73. [PMID: 12626216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
OBJECTIVE To investigate levels of follicle stimulating hormone (FSH), as a measure of ovarian function and menopausal symptoms prior to and following hysterectomy in women under the age of 45 years. DESIGN This was a prospective controlled study. SAMPLE A total of 56 hysterectomy patients and 34 controls, up to the age of 42 years, were recruited. METHODS Women undergoing hysterectomy were recruited prior to their operation and were matched, where possible, with controls for age, parity and smoking. Five blood samples were taken over 2 years, two before the operation (or at a 1-month interval in the control group) and then at 6 months, 1 year and 2 years. Questionnaires were completed at each sampling to assess symptoms associated with reduced estrogen secretion. RESULTS No significant differences in FSH levels between patients and controls were found. Modest differences in FSH levels between different time-points were identified (p = 0.03), but this disappeared if age and smoking were included as covariates. For the questionnaire data, there were no significant differences between the two groups on the somatic and vasomotor scales, but for psychological symptoms the patients scored significantly higher than the controls (p = 0.007), particularly at the pre-operation time-point. CONCLUSION The study found no evidence of compromise of ovarian function, as reflected in FSH levels, within 2 years of hysterectomy. Psychological symptoms were higher in women undergoing hysterectomy both before and after the operation.
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Affiliation(s)
- C Chalmers
- Napier University, Education Centre, Borders General Hospital, Melrose, Scotland
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Abstract
OBJECTIVE We sought to determine the pregnancy and infant outcomes of women with gestational diabetes who attempted vaginal birth after previous cesarean delivery. STUDY DESIGN We conducted a retrospective cohort study to compare women with gestational diabetes with matched control subjects without diabetes who attempted vaginal birth after cesarean at Grady Memorial Hospital, Atlanta, from January 1, 1989, through December 31, 1999. One hundred fifty-six women with gestational diabetes were matched with 272 control subjects. Data were analyzed with the Student t test, chi2 analysis, and the Fisher exact test. RESULTS The parities of the women with gestational diabetes and the control subjects were similar, with most having had only one previous pregnancy. Women with gestational diabetes were significantly older than control subjects and more likely to be white or Hispanic. Women with gestational diabetes who attempted a trial of labor were significantly more likely than control subjects to be delivered abdominally. Women with gestational diabetes who had a successful vaginal birth after cesarean were significantly more likely than control subjects to have an operative delivery with forceps or vacuum. CONCLUSION Women with gestational diabetes are less likely than those without diabetes to have a successful trial of labor. Women with gestational diabetes considering vaginal birth after cesarean should be appropriately counseled about the risk of attempting a trial of labor after previous cesarean delivery.
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Affiliation(s)
- T L Coleman
- Division of Maternal-Fetal Medicine, Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia 30303, USA
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Kabiru WN, Jamieson D, Graves W, Lindsay M. Trends in operative vaginal delivery rates and associated maternal complication rates in an inner-city hospital. Am J Obstet Gynecol 2001; 184:1112-4. [PMID: 11349172 DOI: 10.1067/mob.2001.115178] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aims of this study were to determine trends in operative vaginal delivery rates in a large inner-city hospital and to assess associated risks. STUDY DESIGN We performed a retrospective cohort study (1980-1996) of women with singleton term pregnancies who underwent operative vaginal delivery at Grady Memorial Hospital, Atlanta. Maternal complication rates were compared between forceps-assisted and vacuum-assisted methods. RESULTS There was a decline in forceps-assisted deliveries during the 1980s and an increase during the 1990s. The vacuum-assisted delivery rate was exceedingly low during the 1980s and increased during the 1990s. Women who underwent forceps-assisted delivery were more likely to be <24 years old, to be nulliparous, and to have had regional anesthesia, midline episiotomies, and infant presentations other than occipitoanterior (P <.001). Women who underwent forceps-assisted deliveries had increased risks of postpartum infection, cervical laceration, prolonged hospital stay, perineal laceration, and postpartum complications. CONCLUSION There were upward trends in the rates of operative vaginal delivery at this inner-city hospital. Women who underwent forceps-assisted delivery had greater rates of maternal complications than did those who underwent vacuum-assisted delivery.
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Affiliation(s)
- W N Kabiru
- Division of Maternal-Fetal Medicine, Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia 30303, USA
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Rodriguez EJ, Spann C, Jamieson D, Lindsay M. Postoperative morbidity associated with cesarean delivery among human immunodeficiency virus-seropositive women. Am J Obstet Gynecol 2001; 184:1108-11. [PMID: 11349171 DOI: 10.1067/mob.2001.115179] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aim of this study was to compare the complication rates associated with cesarean delivery between human immunodeficiency virus-seropositive women with those among a matched group of human immunodeficiency virus-seronegative subjects. STUDY DESIGN We conducted a case-control study of 86 human immunodeficiency virus-seropositive women undergoing cesarean delivery between the years 1992 and 2000 at a large, urban teaching institution and a control group of 86 human immunodeficiency virus-seronegative women matched for age, race, year of delivery, and delivery indications. Data were analyzed with the chi2 test and odds ratios. Among human immunodeficiency virus-seropositive women, complications were further stratified according to maternal disease status and use of antiretroviral therapy. RESULTS Human immunodeficiency virus-seropositive women were significantly more likely than control women to have minor postoperative complications (66.3% vs 41.8%; odds ratio, 2.73; 95% confidence interval, 1.40-6.10), of which febrile morbidity was the most common (62.8% vs 42.7%; P =.003). There was no difference between the groups in the rate of major complications (9.3% vs 3.4%; odds ratio, 2.84; 95% confidence interval, 0.65-14.06). Zidovudine use was associated with a decrease in the maternal morbidity rate (odds ratio, 0.31; 95% confidence interval, 0.07-1.03). CONCLUSION Postoperative morbidity among human immunodeficiency virus-seropositive women undergoing cesarean delivery was not different from that in a matched control population.
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Affiliation(s)
- E J Rodriguez
- Division of Maternal-Fetal Medicine, Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia 30303, USA
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MacAry PA, Lindsay M, Scott MA, Craig JI, Luzio JP, Lehner PJ. Mobilization of MHC class I molecules from late endosomes to the cell surface following activation of CD34-derived human Langerhans cells. Proc Natl Acad Sci U S A 2001; 98:3982-7. [PMID: 11274420 PMCID: PMC31165 DOI: 10.1073/pnas.071477498] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Langerhans cells are a subset of dendritic cells (DCs) found in the human epidermis with unique morphological and molecular properties that enable their function as "sentinels" of the immune system. DCs are pivotal in the initiation and regulation of primary MHC class I restricted T lymphocyte immune responses and are able to present both endogenous and exogenous antigen onto class I molecules. Here, we study the MHC class I presentation pathway following activation of immature, CD34-derived human Langerhans cells by lipopolysaccharide (LPS). LPS induces an increase in all components of the MHC class I pathway including the transporter for antigen presentation (TAP), tapasin and ERp57, and the immunoproteasome subunits LMP2 and LMP7. Moreover, in CD34-derived Langerhans cells, the rapid increase in expression of MHC class I molecules seen at the cell surface following LPS activation is because of mobilization of MHC class I molecules from HLA-DM positive endosomal compartments, a pathway not seen in monocyte-derived DCs. Mobilization of class I from this compartment is primaquine sensitive and brefeldin A insensitive. These data demonstrate the regulation of the class I pathway in concert with the maturation of the CD34-derived Langerhans cells and suggest potential sites for antigen loading of class I proteins.
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Affiliation(s)
- P A MacAry
- Division of Immunology, Department of Pathology, Wellcome Trust Center for Molecular Mechanisms in Disease, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 2XY, United Kingdom
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Gillooly DJ, Morrow IC, Lindsay M, Gould R, Bryant NJ, Gaullier JM, Parton RG, Stenmark H. Localization of phosphatidylinositol 3-phosphate in yeast and mammalian cells. EMBO J 2000; 19:4577-88. [PMID: 10970851 PMCID: PMC302054 DOI: 10.1093/emboj/19.17.4577] [Citation(s) in RCA: 844] [Impact Index Per Article: 35.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Phosphatidylinositol 3-kinase (PI3K) regulates several vital cellular processes, including signal transduction and membrane trafficking. In order to study the intracellular localization of the PI3K product, phosphatidylinositol 3-phosphate [PI(3)P], we constructed a probe consisting of two PI(3)P-binding FYVE domains. The probe was found to bind specifically, and with high affinity, to PI(3)P both in vitro and in vivo. When expressed in fibroblasts, a tagged probe localized to endosomes, as detected by fluorescence microscopy. Electron microscopy of untransfected fibroblasts showed that PI(3)P is highly enriched on early endosomes and in the internal vesicles of multivesicular endosomes. While yeast cells deficient in PI3K activity (vps15 and vps34 mutants) were not labelled, PI(3)P was found on intralumenal vesicles of endosomes and vacuoles of wild-type yeast. vps27Delta yeast cells, which have impaired endosome to vacuole trafficking, showed a decreased vacuolar labelling and increased endosome labelling. Thus PI(3)P follows a conserved intralumenal degradation pathway, and its generation, accessibility and turnover are likely to play a crucial role in defining the early endosome and the subsequent steps leading to multivesicular endosome formation.
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Affiliation(s)
- D J Gillooly
- Department of Biochemistry, Institute for Cancer Research, The Norwegian Radium Hospital, Montebello, 0310 Oslo, Norway
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Mullock BM, Smith CW, Ihrke G, Bright NA, Lindsay M, Parkinson EJ, Brooks DA, Parton RG, James DE, Luzio JP, Piper RC. Syntaxin 7 is localized to late endosome compartments, associates with Vamp 8, and Is required for late endosome-lysosome fusion. Mol Biol Cell 2000; 11:3137-53. [PMID: 10982406 PMCID: PMC14981 DOI: 10.1091/mbc.11.9.3137] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Protein traffic from the cell surface or the trans-Golgi network reaches the lysosome via a series of endosomal compartments. One of the last steps in the endocytic pathway is the fusion of late endosomes with lysosomes. This process has been reconstituted in vitro and has been shown to require NSF, alpha and gamma SNAP, and a Rab GTPase based on inhibition by Rab GDI. In Saccharomyces cerevisiae, fusion events to the lysosome-like vacuole are mediated by the syntaxin protein Vam3p, which is localized to the vacuolar membrane. In an effort to identify the molecular machinery that controls fusion events to the lysosome, we searched for mammalian homologues of Vam3p. One such candidate is syntaxin 7. Here we show that syntaxin 7 is concentrated in late endosomes and lysosomes. Coimmunoprecipitation experiments show that syntaxin 7 is associated with the endosomal v-SNARE Vamp 8, which partially colocalizes with syntaxin 7. Importantly, we show that syntaxin 7 is specifically required for the fusion of late endosomes with lysosomes in vitro, resulting in a hybrid organelle. Together, these data identify a SNARE complex that functions in the late endocytic system of animal cells.
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Affiliation(s)
- B M Mullock
- Wellcome Trust Centre for Molecular Mechanisms in Disease, University of Cambridge, Addenbrooke's Hospital, Cambridge CB2 2XY, United Kingdom
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Kobayashi T, Vischer UM, Rosnoblet C, Lebrand C, Lindsay M, Parton RG, Kruithof EK, Gruenberg J. The tetraspanin CD63/lamp3 cycles between endocytic and secretory compartments in human endothelial cells. Mol Biol Cell 2000; 11:1829-43. [PMID: 10793155 PMCID: PMC14887 DOI: 10.1091/mbc.11.5.1829] [Citation(s) in RCA: 232] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
In the present study, we show that in human endothelial cells the tetraspanin CD63/lamp3 distributes predominantly to the internal membranes of multivesicular-multilamellar late endosomes, which contain the unique lipid lysobisphosphatidic acid. Some CD63/lamp3 is also present in Weibel-Palade bodies, the characteristic secretory organelle of these cells. We find that CD63/lamp3 molecules can be transported from late endosomes to Weibel-Palade bodies and thus that CD63/lamp3 cycles between endocytic and biosynthetic compartments; however, movement of CD63/lamp3 is much slower than that of P-selectin, which is known to cycle between plasma membrane and Weibel-Palade bodies. When cells are treated with U18666A, a drug that mimics the Niemann-Pick type C syndrome, both proteins accumulate in late endosomes and fail to reach Weibel-Palade bodies efficiently, suggesting that P-selectin, like CD63/lamp3, cycles via late endosomes. Our data suggest that CD63/lamp3 partitions preferentially within late endosome internal membranes, thus causing its accumulation, and that this mechanism contributes to CD63/lamp3 retention in late endosomes; however, our data also indicate that the protein can eventually escape from these internal membranes and recycle toward Weibel-Palade bodies to be reused. Our observations thus uncover the existence of a selective trafficking route from late endosomes to Weibel-Palade bodies.
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Affiliation(s)
- T Kobayashi
- Department of Biochemistry, Sciences II, University of Geneva, 1211-Geneva-4, Switzerland
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Abstract
Ras proteins must be localized to the inner surface of the plasma membrane to be biologically active. The motifs that effect Ras plasma membrane targeting consist of a C-terminal CAAX motif plus a second signal comprising palmitoylation of adjacent cysteine residues or the presence of a polybasic domain. In this study, we examined how Ras proteins access the cell surface after processing of the CAAX motif is completed in the endoplasmic reticulum (ER). We show that palmitoylated CAAX proteins, in addition to being localized at the plasma membrane, are found throughout the exocytic pathway and accumulate in the Golgi region when cells are incubated at 15 degrees C. In contrast, polybasic CAAX proteins are found only at the cell surface and not in the exocytic pathway. CAAX proteins which lack a second signal for plasma membrane targeting accumulate in the ER and Golgi. Brefeldin A (BFA) significantly inhibits the plasma membrane accumulation of newly synthesized, palmitoylated CAAX proteins without inhibiting their palmitoylation. BFA has no effect on the trafficking of polybasic CAAX proteins. We conclude that H-ras and K-ras traffic to the cell surface through different routes and that the polybasic domain is a sorting signal diverting K-Ras out of the classical exocytic pathway proximal to the Golgi. Farnesylated Ras proteins that lack a polybasic domain reach the Golgi but require palmitoylation in order to traffic further to the cell surface. These data also indicate that a Ras palmitoyltransferase is present in an early compartment of the exocytic pathway.
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Affiliation(s)
- A Apolloni
- Queensland Cancer Fund Laboratory of Experimental Oncology, Department of Pathology, University of Queensland Medical School, Brisbane 4069, Australia
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Galve-de Rochemonteix B, Kobayashi T, Rosnoblet C, Lindsay M, Parton RG, Reber G, de Maistre E, Wahl D, Kruithof EK, Gruenberg J, de Moerloose P. Interaction of anti-phospholipid antibodies with late endosomes of human endothelial cells. Arterioscler Thromb Vasc Biol 2000; 20:563-74. [PMID: 10669657 DOI: 10.1161/01.atv.20.2.563] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Anti-phospholipid antibodies (APLAs) are associated with thrombosis and/or recurrent pregnancy loss. APLAs bind to anionic phospholipids directly or indirectly via a cofactor such as beta(2)-glycoprotein 1 (beta(2)GPI). The lipid target of APLA is not yet established. Recently, we observed that APLAs in vitro can bind lysobisphosphatidic acid (LBPA). The internal membranes of late endosomes are enriched in this phospholipid. The current study was undertaken to determine to what extent binding of APLA to LBPA is correlated with binding to cardiolipin and to beta(2)GPI and to determine whether patient antibodies interact with late endosomes of human umbilical vein endothelial cells (HUVECs) and thus modify the intracellular trafficking of proteins. Binding of patient immunoglobulin G (n=37) to LBPA was correlated significantly with binding to cardiolipin. Although LBPA binding was correlated to a lesser extent with beta(2)GPI binding, we observed that beta(2)GPI binds with high affinity to LBPA. Immunofluorescence studies showed that late endosomes of HUVECs contain LBPA. Patient but not control antibodies recognized late endosomes, but not cardiolipin-rich mitochondria, even when we used antibodies that were immunopurified on cardiolipin. Incubation of HUVECs with patient plasma samples immunoreactive toward LBPA resulted in an accumulation of the antibodies in late endosomes and led to a redistribution of the insulinlike growth factor 2/mannose-6-phosphate receptor from the Golgi apparatus to late endosomes. Our results suggest that LBPA is an important lipid target of APLA in HUVECs. These antibodies are internalized by the cells and accumulate in late endosomes. By modifying the intracellular trafficking of proteins, APLA could contribute to several of the proposed pathogenic mechanisms leading to the antiphospholipid syndrome.
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Lindsay M. Cerebral vascular accident after cardiac surgery: its impact on nursing care. Prog Cardiovasc Nurs 1999; 14:47-52. [PMID: 10457957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
The number of patients undergoing coronary artery bypass grafting (CABG) per year is increasing. Despite advances in surgical techniques, cerebral vascular accident (CVA) post cardiac surgery is increasing. CVA is a severe neurological complication of cardiac surgery which increased length of stay, morbidity and mortality, and rehabilitation. It is important to identify patients at increased risk and utilize appropriate screening techniques to decrease the incidence of CVA. Nursing assessment, interventions, and postoperative neurological assessment is crucial in identifying patients at increased risk for CVA.
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Affiliation(s)
- M Lindsay
- Washington Hospital Center, Washington, DC 20010, USA
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Kobayashi T, Beuchat MH, Lindsay M, Frias S, Palmiter RD, Sakuraba H, Parton RG, Gruenberg J. Late endosomal membranes rich in lysobisphosphatidic acid regulate cholesterol transport. Nat Cell Biol 1999; 1:113-8. [PMID: 10559883 DOI: 10.1038/10084] [Citation(s) in RCA: 385] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The fate of free cholesterol released after endocytosis of low-density lipoproteins remains obscure. Here we report that late endosomes have a pivotal role in intracellular cholesterol transport. We find that in the genetic disease Niemann-Pick type C (NPC), and in drug-treated cells that mimic NPC, cholesterol accumulates in late endosomes and sorting of the lysosomal enzyme receptor is impaired. Our results show that the characteristic network of lysobisphosphatidic acid-rich membranes contained within multivesicular late endosomes regulates cholesterol transport, presumably by acting as a collection and distribution device. The results also suggest that similar endosomal defects accompany the anti-phospholipid syndrome and NPC.
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Affiliation(s)
- T Kobayashi
- Department of Biochemistry, University of Geneva, Switzerland
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