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Green C, McGinley J, Sande C, Capone S, Makvandi-Nejad S, Vitelli A, Silva-Reyes L, Bibi S, Otasowie C, Sheerin D, Thompson A, Dold C, Klenerman P, Barnes E, Dorrell L, Rollier C, Pollard A, O’Connor D. Transcriptomic response and immunological responses to chimpanzee adenovirus- and MVA viral-vectored vaccines for RSV in healthy adults. Clin Exp Immunol 2023; 211:269-279. [PMID: 36622786 PMCID: PMC10038321 DOI: 10.1093/cei/uxad003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 10/30/2022] [Accepted: 01/06/2023] [Indexed: 01/10/2023] Open
Abstract
Cohorts of healthy younger adults (18-50yrs) and healthy older adults (60-75yrs) were immunized intramuscularly or intranasally with an adenovirus-vectored RSV vaccine (PanAd3-RSV) as a prime dose and boosted with PanAd3-RSV or a poxvirus-vectored vaccine (MVA-RSV) encoding the same insert. Whole blood gene expression was measured at baseline, 3- and 7-days post vaccination. Intramuscular prime vaccination with PanAd3-RSV induced differential expression of 643 genes (DEGs, FDR < 0.05). Intranasal prime vaccination with PanAd3-RSV did not induce any differentially expressed genes (DEGs) in blood samples at 3 days post vaccination. Intranasally primed participants showed greater numbers of DEGS on boosting than intramuscularly primed participants. The most highly enriched biological processes related to DEGs after both prime and boost vaccination were type-1 interferon related pathways, lymphocytic and humoral immune responses.
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Affiliation(s)
- C Green
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
- Institute of Microbiology & Infection, University of Birmingham, Birmingham, UK
| | - J McGinley
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - C Sande
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - S Capone
- Experimental Vaccinology Department, ReiThera Srl, Roma, Italy
| | - S Makvandi-Nejad
- Nuffield Department of Medicine, University of Oxford NDM Research Building, Oxford, UK
| | - A Vitelli
- Experimental Vaccinology Department, ReiThera Srl, Roma, Italy
| | - L Silva-Reyes
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - S Bibi
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - C Otasowie
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - D Sheerin
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - A Thompson
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - C Dold
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - P Klenerman
- Experimental Medicine Division, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - E Barnes
- Experimental Medicine Division, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - L Dorrell
- Nuffield Department of Medicine, University of Oxford NDM Research Building, Oxford, UK
| | - C Rollier
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - A Pollard
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - D O’Connor
- Oxford Vaccine Group, Department of Paediatrics and the NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
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2
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Bradley AJ, Maskell GF, Mannava A, Pollard A, Welsh T. Routes to diagnosis and missed opportunities in the detection of renal cancer. Clin Radiol 2020; 76:129-134. [PMID: 33309335 DOI: 10.1016/j.crad.2020.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 11/17/2020] [Indexed: 12/21/2022]
Abstract
AIM To determine the proportion of renal cancers for which incidental detection was the route to diagnosis, the characteristics of tumours identified in this way, and the frequency with which opportunities to make this diagnosis were missed. MATERIALS AND METHODS Consecutive patients with renal cancers treated at Royal Cornwall Hospitals NHS Trust (April 2011 and July 2018 inclusive) were identified from the Trust's cancer registry database, and a retrospective review of the imaging and electronic case notes was undertaken. Mann-Whitney U-tests for comparison of patient age and tumour size at diagnosis, and chi-squared tests for comparing cell type distribution and grade were performed. Logistic regression was then used to identify the characteristics of patients in whom a renal tumour was missed initially. RESULTS Of 327 patients, 194 (63%) presented incidentally, and 133 (37%) symptomatically. Incidentally detected cancers were found in younger patients, (median of 65 years versus 69 p=0.01) and were smaller at presentation (median of 5.5 versus 7.2 cm, p<0.00001). Thirty-six different reporters missed opportunities to diagnose renal cancer in 50 (16%) patients on 78 occasions, 28 lesions (35%) being missed more than once. Thirty were imaged incompletely; four were visible only on a single image and three on a scout view at magnetic resonance imaging. CONCLUSION The commonest route to diagnosis of renal cancer is by incidental detection of a mass. In 16% of patients in whom renal cancer is diagnosed, there is at least one prior examination on which the lesion is visible at an earlier date. The clinical impact of these missed diagnostic opportunities remains uncertain.
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Affiliation(s)
- A J Bradley
- Department of Radiology, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall TR1 3LQ, UK.
| | - G F Maskell
- Department of Radiology, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall TR1 3LQ, UK
| | - A Mannava
- Department of Radiology, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall TR1 3LQ, UK
| | - A Pollard
- Research Development and Innovation, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall TR1 3LQ, UK
| | - T Welsh
- Department of Radiology, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall TR1 3LQ, UK
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Raffe S, Pollard A, Vera JH, Soni S, Peralta C, Rodriguez L, Dean G, Llewellyn CD. HIV self-tests for men who have sex with men, accessed via a digital vending machine: a qualitative study of acceptability. Int J STD AIDS 2020; 31:420-425. [PMID: 32188345 DOI: 10.1177/0956462419890726] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
As the number of people living with undiagnosed HIV infection in the UK declines, innovative ways to access those least engaged with services are needed. This study explores the attitudes of men who have sex with men (MSM) towards using HIV self-testing (HIVST) kits distributed via a vending machine in a sauna (a licenced sex-on-premise venue). Twenty-three MSM attending the sauna were recruited to take part in semi-structured qualitative interviews. The participants were overwhelmingly positive about the HIVST vending machine. They identified convenience and flexibility as major benefits to testing in this way. The sauna was felt to be an appropriate location for the intervention. Limitations identified included the potential to reduce screening for other sexually transmitted infections and the inappropriate use of HIVST kits as a tool for risk-assessment prior to condomless sex, with a poor understanding of the window period. The implications of receiving a positive result without immediate access to support were also a concern. HIVST vending machines are an acceptable, innovative way to encourage HIV testing. Providers need to ensure this intervention is supported by adequate information regarding the limitations of the test and how to access comprehensive services to avoid any unintended negative effects.
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Affiliation(s)
- S Raffe
- Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
| | - A Pollard
- Department of Primary Care and Public Health, Brighton and Sussex Medical School, Brighton, UK
| | - J H Vera
- Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.,Department of Global Health and Infection, Brighton and Sussex Medical School, Brighton, UK
| | - S Soni
- Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
| | - C Peralta
- Department of Design and Architecture, University of Brighton, Brighton, UK
| | | | - G Dean
- Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.,Martin Fisher Foundation, Brighton, UK
| | - C D Llewellyn
- Department of Primary Care and Public Health, Brighton and Sussex Medical School, Brighton, UK
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Abstract
Abstract
The near-infrared (NIR) spectral region (700-2500 nm) is a fertile source of chemical information in the form of overtone and combination bands of the fundamental infrared absorptions and low-energy electronic transitions. This region was initially perceived as being too complex for interpretation and consequently was poorly utilized. Advances in chemometric techniques that can extract massive amounts of chemical information from the highly overlapped, complex spectra have led to extensive use of NIR spectrophotometry (NIRS) in the food, agriculture, pharmaceutical, chemical, and polymer industries. The application of NIRS in clinical laboratory measurements is still in its infancy. NIRS is a simple, quick, nondestructive technique capable of providing clinically relevant analyses of biological samples with precision and accuracy comparable with the method used to derive the NIRS models. Analyses can be performed with little or no sample preparation and no reagents. The success of NIRS in any particular case is determined by the complexity of the sample matrix, relative NIR absorptivities of the constituents, and the wavelengths and regression technique chosen. We describe the general approach to data acquisition, calibration, and analysis, using serum proteins, triglycerides, and glucose as examples.
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Affiliation(s)
- J W Hall
- Department of Clinical Biochemistry, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - A Pollard
- Department of Clinical Biochemistry, Mount Sinai Hospital, Toronto, Ontario, Canada
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Pollard A, Hauson A, Stelmach N, Sarkissians S, Walker A, Cabral C, Wollman S, Hall M. A-25 Paced Auditory Serial Addition Test in Individuals with Cocaine Versus Methamphetamine Dependence. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
Research suggests that cocaine and methamphetamine differ in their impact on executive functions (EF). The Paced Auditory Serial Addition Test (PASAT) is used to assess working memory; a component of EF. The purpose of this meta-analysis was to examine the difference between the effect of these two drugs on PASAT scores.
Data Selection
Three researchers independently searched nine databases (e.g., PsycINFO, Pubmed, ProceedingsFirst), extracted required data, and calculated effect sizes. Inclusion criteria identified studies that had (a) compared cocaine or methamphetamine dependent groups to healthy controls and (b) matched groups on either age, education, or IQ (at least 2 out of 3). Studies were excluded if participants were reported to have Axis I diagnoses (other than cocaine or methamphetamine dependence) or comorbidities known to impact neuropsychological functioning. Six articles were coded and analyzed for the current study.
Data Synthesis
Cocaine studies showed a medium statistically significant effect size (g = 0.370, p = 0.020), while methamphetamine did not (g = 0.198, p = 0.172). There was no heterogeneity in effect sizes for both drugs. Subgroup analysis found no significant difference between the two drugs on the PASAT (Q-between = 0.646, p = 0.421).
Conclusions
In contrast to methamphetamine, cocaine is associated with poorer performance on PASAT. This is in line with previous studies that found that cocaine had more significant impact on EF than methamphetamine. Given the preliminary nature of this meta-analysis and the small number of studies on the topic, future primary studies should directly contrast how these two drugs impact EF.
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Walker A, Hauson A, Sarkissians S, Pollard A, Flora-Tostado C, Stelmach N, Holt A, Wollman S, Hall M. A-17 Category Test performance in individuals with alcohol versus methamphetamine dependence. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
The Category Test (CT) has consistently been found to be sensitive at detecting the effects of alcohol on the brain. However, this test has not been as widely used in examining the effects of methamphetamine. The current meta-analysis compared effect sizes of studies that have examined performance on the CT in alcohol versus methamphetamine dependent participants.
Data selection
Three researchers independently searched nine databases (e.g., PsycINFO, Pubmed, ProceedingsFirst), extracted required data, and calculated effect sizes. Inclusion criteria identified studies that had (a) compared alcohol or methamphetamine dependent groups to healthy controls and (b) matched groups on either age, education, or IQ (at least 2 out of 3). Studies were excluded if participants were reported to have Axis I diagnoses (other than alcohol or methamphetamine dependence) or comorbidities known to impact neuropsychological functioning. Sixteen articles were coded and analyzed for the current study.
Data synthesis
Alcohol studies showed a large effect size (g = 0.745, p < 0.001) while methamphetamine studies evidenced a moderate effect size (g = 0.406, p = 0.001); both without statistically significant heterogeneity (I2 = 0). Subgroup analysis revealed a statistically significant difference between the effect sizes from alcohol versus methamphetamine studies (Q-between = 5.647, p = 0.017).
Conclusions
The CT is sensitive to the effects of both alcohol and methamphetamine and should be considered when examining dependent patients who might exhibit problem solving, concept formation, and set loss difficulties in everyday living.
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7
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Srinivas SU, Gall Z, Lynch N, Pollard A, Counsell A, Brown S, Adeyoju AAB. A retrospective, observational study of supine percutaneous nephrolithotomy. Journal of Clinical Urology 2018. [DOI: 10.1177/2051415817731969] [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
Objective: The objective of this study is to assess stone clearance and perioperative complication rates of supine percutaneous nephrolithotomy (PCNL). Methods: This was a retrospective, observational study of supine PCNL performed in a surgical unit at a district general hospital by two surgeons in the United Kingdom. Data collected included patient demographics, comorbidities, complexity of renal calculi, perioperative complications and stone clearance rates. Results: A total of 112 supine PCNL procedures were observed in this study. The mean (SD) American Society of Anesthesiologists (ASA) grade and Guy’s Stone Score were 2.0 (0.75) and 2.3 (1.06) respectively. The median (interquartile range (IQR)) duration of in-patient admission was four (one) nights. Complete stone clearance was achieved in 74 (67.3%) of the procedures, while more than 90% clearance of the renal stone burden was achieved in a further eight (7.3%). The most common perioperative complications recorded were blood loss requiring blood transfusion (three (2.7%)) and postoperative fever (two (1.8%)). Conclusion: This case series shows that supine PCNL can lead to good stone clearance and low complication rates.
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Affiliation(s)
- SU Srinivas
- Royal Stoke University Hospital, Department of Radiology, UK
| | - Z Gall
- Stepping Hill Hospital, Department of Urology, UK
| | - N Lynch
- Stepping Hill Hospital, Department of Radiology, UK
| | - A Pollard
- Stepping Hill Hospital, Department of Radiology, UK
| | - A Counsell
- Stepping Hill Hospital, Department of Radiology, UK
| | - S Brown
- Stepping Hill Hospital, Department of Urology, UK
| | - AAB Adeyoju
- Stepping Hill Hospital, Department of Urology, UK
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8
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Cooper V, Clatworthy J, Youssef E, Llewellyn C, Miners A, Lagarde M, Sachikonye M, Perry N, Nixon E, Pollard A, Sabin C, Foreman C, Fisher M. Which aspects of health care are most valued by people living with HIV in high-income countries? A systematic review. BMC Health Serv Res 2016; 16:677. [PMID: 27899106 PMCID: PMC5129660 DOI: 10.1186/s12913-016-1914-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 11/09/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Increasing numbers of people with HIV are living into older age and experiencing comorbidities. The development of new models of care to meet the needs of this population is now a priority. It is important that the views and preferences of patients inform the development of services in order to maintain high levels of patient satisfaction and engagement. The aim of this systematic review was to determine which aspects of healthcare are particularly valued by people living with HIV. METHODS We searched electronic databases and reference lists of relevant articles. The search strategy was developed to identify articles reporting on HIV positive patients' perceptions, evaluations or experiences of healthcare services and factors associated with satisfaction with care. Peer-reviewed papers and conference abstracts were included if the study reported on aspects of health care that were valued by people living with HIV, data were collected during the era of combination therapy (from 1996 onwards), and the paper was published in English. A thematic approach to data synthesis was used. RESULTS Twenty-three studies met the inclusion criteria. Studies used both qualitative and quantitative methods. Six studies specifically reported on relative importance to patients of different aspects of care. The valued aspects of care identified were grouped into seven themes. These highlighted the importance to patients of: a good health care professional-patient relationship, HIV specialist knowledge, continuity of care, ease of access to services, access to high quality information and support, effective co-ordination between HIV specialists and other healthcare professionals, and involvement in decisions about treatment and care. We were unable to determine the relative importance to patients of different aspects of care because of methodological differences between the studies. CONCLUSIONS This review identified several attributes of healthcare that are valued by people living with HIV, many of which would be relevant to any future reconfiguration of services to meet the needs of an ageing population. Further research is required to determine the relative importance to patients of different aspects of care.
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Affiliation(s)
- V. Cooper
- Elton John Centre, Sussex House, Brighton and Sussex University Hospitals NHS Trust, 1 Abbey Road, Brighton, BN2 1ES UK
| | - J. Clatworthy
- Elton John Centre, Sussex House, Brighton and Sussex University Hospitals NHS Trust, 1 Abbey Road, Brighton, BN2 1ES UK
| | - E. Youssef
- Elton John Centre, Sussex House, Brighton and Sussex University Hospitals NHS Trust, 1 Abbey Road, Brighton, BN2 1ES UK
| | - C. Llewellyn
- Division of Public Health & Primary Care, Brighton & Sussex Medical School, Room 317 Mayfield House, Falmer, Brighton, BN1 9PH UK
| | - A. Miners
- Health Services Research Unit, London School of Hygiene and Tropical Medicine, London, WC1E 7HT UK
| | - M. Lagarde
- Health Services Research Unit, Global Health and Development, London School of Hygiene and Tropical Medicine, London, WC1E 9SY UK
| | - M. Sachikonye
- UK Community Advisory Board Country United Kingdom (England), c/o HIV i-Base, 4th Floor, 57 Great Suffolk Street, London, SE1 0BB UK
| | - N. Perry
- Elton John Centre, Sussex House, Brighton and Sussex University Hospitals NHS Trust, 1 Abbey Road, Brighton, BN2 1ES UK
| | - E. Nixon
- Elton John Centre, Sussex House, Brighton and Sussex University Hospitals NHS Trust, 1 Abbey Road, Brighton, BN2 1ES UK
| | - A. Pollard
- Division of Public Health & Primary Care, Brighton & Sussex Medical School, Room 317 Mayfield House, Falmer, Brighton, BN1 9PH UK
| | - C. Sabin
- UCL Medical School, Infection and Population Health, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF UK
| | - C. Foreman
- NHS England, Southside - Mezzanine Floor, 105 Victoria Street, London, SW1E 6QT UK
| | - M. Fisher
- Elton John Centre, Sussex House, Brighton and Sussex University Hospitals NHS Trust, 1 Abbey Road, Brighton, BN2 1ES UK
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9
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Pollard A, Burchell J, Castle D, Neilson K, Ftanou M, Corry J, Rischin D, Kissane D, Krishnasamy M, Carlson L, Couper J. Individualised mindfulness-based stress reduction for head and neck cancer patients undergoing radiotherapy of curative intent: a descriptive pilot study. Eur J Cancer Care (Engl) 2016; 26. [DOI: 10.1111/ecc.12474] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2016] [Indexed: 02/04/2023]
Affiliation(s)
- A. Pollard
- Department of Clinical Psychology, Psychosocial Oncology; Peter MacCallum Cancer Centre; Melbourne Vic. Australia
- University of Melbourne; Melbourne Vic. Australia
| | - J.L. Burchell
- Department of Psychiatry; Peter MacCallum Cancer Centre; Melbourne Vic. Australia
- Department of Medicine; St. Vincent's Hospital; The University of Melbourne; Fitzroy Vic. Australia
| | - D. Castle
- Department of Psychiatry; St. Vincent's Hospital and University of Melbourne; Fitzroy Vic. Australia
| | - K. Neilson
- Department of Clinical Psychology; Peter MacCallum Cancer Centre; Melbourne Vic. Australia
| | - M. Ftanou
- Department of Clinical Psychology; Peter MacCallum Cancer Centre; Melbourne Vic. Australia
- University of Melbourne; Melbourne Vic. Australia
| | - J. Corry
- Peter MacCallum Cancer Centre; Melbourne Vic. Australia
- University of Melbourne; Melbourne Vic. Australia
| | - D. Rischin
- Peter MacCallum Cancer Centre; Melbourne Vic. Australia
- University of Melbourne; Melbourne Vic. Australia
| | - D.W. Kissane
- Department of Psychiatry; Monash Medical Centre; Monash University; Clayton Vic. Australia
| | - M. Krishnasamy
- Department of Patient Cancer Experiences; Peter MacCallum Cancer Centre; Melbourne Vic. Australia
| | - L.E. Carlson
- Department of Psychosocial Resources; Holy Cross Site Cancer Control Alberta; Calgary AB Canada
- Department of Oncology; Cumming School of Medicine; University of Calgary; Calgary AB Canada
| | - J. Couper
- Department of Psychiatry; Psychosocial Oncology; Peter MacCallum Cancer Centre; Melbourne Vic. Australia
- Department of Psychiatry; St. Vincent's Hospital and University of Melbourne; Fitzroy Vic. Australia
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Affiliation(s)
- A Pollard
- The Royal Victoria Infirmary, Newcastle upon Tyne, UK
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11
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LaRue MA, Lynch HJ, Lyver POB, Barton K, Ainley DG, Pollard A, Fraser WR, Ballard G. A method for estimating colony sizes of Adélie penguins using remote sensing imagery. Polar Biol 2014. [DOI: 10.1007/s00300-014-1451-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Pollard A, Llewellyn C, Smith H, Richardson D, Fisher M. Opt-out testing for HIV: perspectives from a high prevalence community in south-east England, UK. Int J STD AIDS 2013; 24:307-12. [PMID: 23970663 DOI: 10.1177/0956462412472424] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Peoples' perspectives and attitudes towards being offered opt-out HIV testing were explored in a geographical area of high HIV prevalence. Users (n = 31) of sexually transmitted infection (STI) testing services took part in community focus groups in the south-east of England, UK. There was broad support for opt-out HIV testing based on public health and individual health benefits. For this sample, opt-out HIV testing when registering with a general practice surgery and on elective or emergency admission to a general hospital was acceptable, although there were concerns about the rigour of informed consent. Heterosexual participants' criticism of people from higher prevalence groups for HIV declining tests, while maintaining their own right to opt-out, suggested that attitudes towards testing may be influenced by levels of perceived risk. Innovations in HIV testing policies to increase testing rates will benefit from an acknowledgement of the different meanings that testing has.
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Affiliation(s)
- A Pollard
- Brighton & Sussex Medical School, University Hospitals NHS Trust, Brighton, UK
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Michael N, Stepanov N, Spruyt O, Pollard A, Clayton J, O'Callaghan C. UNDERSTANDING HOW CANCER PATIENTS ACTUALISE, RELINQUISH, AND REJECT ADVANCE CARE PLANNING: IMPLICATIONS FOR PRACTICE. BMJ Support Palliat Care 2013. [DOI: 10.1136/bmjspcare-2013-000491.15] [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: 11/04/2022]
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14
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Zhang J, Xu M, Pollard A, Mi J. Effects of external intermittency and mean shear on the spectral inertial-range exponent in a turbulent square jet. Phys Rev E Stat Nonlin Soft Matter Phys 2013; 87:053009. [PMID: 23767622 DOI: 10.1103/physreve.87.053009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Indexed: 06/02/2023]
Abstract
This study investigates by experiment the dependence of the inertial-range exponent m of the streamwise velocity spectrum on the external intermittency factor γ (≡ the fraction of time the flow is fully turbulent) and the mean shear S in a turbulent square jet. Velocity measurements were made using hot-wire anemometry in the jet at 15 < x/D(e) < 40, where D(e) denotes the exit equivalent diameter, and for an exit Reynolds number of Re = 50,000. The Taylor microscale Reynolds number R(λ) varies from about 70 to 450 in the present study. The TERA (turbulent energy recognition algorithm) method proposed by Falco and Gendrich [in Near-Wall Turbulence: 1988 Zoran Zariç Memorial Conference, edited by S. J. Kline and N. H. Afgan (Hemisphere Publishing Corp., Washington, DC, 1990), pp. 911-931] is discussed and applied to estimate the intermittency factor from velocity signals. It is shown that m depends strongly on γ but negligibly on S. More specifically, m varies with γ following m=m(t)+(lnγ(-0.0173))(1/2), where m(t) denotes the spectral exponent found in fully turbulent regions.
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Affiliation(s)
- J Zhang
- State Key Laboratory of Turbulence & Complex Systems, College of Engineering, Peking University, Beijing 100871, China
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15
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Waddington C, Darton T, Jones C, Haworth K, Peters A, Kerridge S, Crook D, Lockhart S, Farrar J, Dougan G, Levine M, Angus B, Pollard A. Variations in attack rate in a single-blind, dose escalation challenge study of Salmonella Typhi in healthy adult volunteers. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.870] [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: 10/28/2022] Open
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16
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Pollard A. Typhoid vaccine landscape. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.079] [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: 10/28/2022] Open
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17
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Darton T, Jones C, Waddington C, Dougan G, Sztein M, Levine M, Angus B, Farrar J, Lockhart S, Crook D, Pollard A, Zhou L. Demonstration of primary and asymptomatic DNAaemia in participants challenged with Salmonella Typhi (Quailes strain) during the development of a human model of typhoid infection. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Jones C, Waddington C, Darton T, Bowman J, Farrar J, Dougan G, Levine M, Lockhart S, Sztein M, Crook D, Angus B, Pollard A. Quantification of antibody secreting cell responses in a human challenge model of Salmonella Typhi infection. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.826] [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: 10/28/2022] Open
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19
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Pollard A, Henderson M, Phillips KA, Dutu G, Murnane A, Bryant C. Abstract PD08-10: Breast Cancer Survivors Healthy Lifestyle Study: A Randomised Controlled Pilot To Test the Effects of a Behavioural Intervention (Information and Advice) on Uptake of Physical Activity in Breast Cancer Survivors. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-pd08-10] [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: Physical activity (PA) is a potentially modifiable behavioural risk factor for breast cancer recurrence. It declines during treatment, and most breast cancer survivors do not engage in PA at recommended levels. Effective interventions to increase PA after primary treatment for early stage breast cancer are needed.
Materials and Methods: Between November 2008 and January 2010, women who had completed primary treatment for early stage breast cancer, and not currently meeting PA guidelines, were randomly assigned to one of three conditions; 1) control group (UC) received a self-care fact sheet, or an intervention group 2) which received a theory based information booklet, diary and pedometer (INFO), or an alternate intervention group 3) which also received theory based information, diary and pedometer combined with a behavioural planning intervention (INFO+BPI). Measures (self reported PA, six minute walk test, mood, and quality of life) were collected at baseline (T1) and at 12 weeks (T2). The primary endpoint was self reported minutes of moderate to strenuous PA per week, secondary endpoints included mood and quality of life. A linear mixed models analysis approach was used to analyse data.
Results: 118 women were randomized and 107 completed T2 measures. The average age of participants was 54.6 years (Range 32-74), 31.8% had stage I disease, 38.3% had stage II disease, 15% had stage IIIa disease and 15% had DCIS, 58% had received adjuvant chemotherapy. Motivation (intention) to increase PA did not differ between groups at T1. There were no differences between groups in PA at T1. PA levels increased in all groups between T1 and T2 (P<0.0001), but PA in the two intervention groups increased significantly more than in controls (+113.9 and +139.9 min per week increase in INFO and INFO + BPI respectively compared to +61.3 min per week in UC), such that at T2, there was a statistically significant difference between the intervention groups versus controls with +65 min per week increase on average (95% CI 25.3 to 104.8, p=0.02). There was no significant difference between the two intervention groups, with +25.9 min difference on average (95% CI -73.4 to 21.6, p=0.25). There were no significant differences in quality of life, anxiety or depression between groups at T1. No adverse events were reported.
Discussion: Minimally intensive, theory-based interventions increased PA participation over a 12 week period in this single centre study. The addition of a behavioural planning intervention to the INFO intervention did not significantly improve PA participation. Results of a T3, 12 month, follow up will be important in determining sustainability of the behaviour change following these interventions. A larger multicentre study is warranted to confirm the efficacy of the intervention.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr PD08-10.
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Affiliation(s)
- A Pollard
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; University of Melbourne, VIC, Australia
| | - M Henderson
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; University of Melbourne, VIC, Australia
| | - K-A Phillips
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; University of Melbourne, VIC, Australia
| | - G Dutu
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; University of Melbourne, VIC, Australia
| | - A Murnane
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; University of Melbourne, VIC, Australia
| | - C. Bryant
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; University of Melbourne, VIC, Australia
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Pollard A, Ramdharry G, Moore S, Hallsworth K, Marsden J, Reilly M. P54 Comparing activity levels between people with Charcot–Marie– Tooth disease and healthy controls – a pilot study. Neuromuscul Disord 2010. [DOI: 10.1016/s0960-8966(10)70069-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ramdharry G, Pollard A, Marsden J, Reilly M. P53 Comparing gait performance of people with Charcot–Marie– Tooth disease who do and do not wear ankle foot orthoses. Neuromuscul Disord 2010. [DOI: 10.1016/s0960-8966(10)70068-7] [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: 11/29/2022]
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Affiliation(s)
- R Manikandan
- Department of Obstetrics and Gynaecology, Urology, Stepping Hill Hospital, Stockport, UK.
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Aranda S, Pollard A, Thompson K, Rose D, Mulcare H, Pigott C. 8054 ORAL Validation of a supportive needs screening tool. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71557-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Greenspoon SA, Sykes KLV, Ban JD, Pollard A, Baisden M, Farr M, Graham N, Collins BL, Green MM, Christenson CC. Automated PCR setup for forensic casework samples using the Normalization Wizard and PCR Setup robotic methods. Forensic Sci Int 2006; 164:240-8. [PMID: 16542806 DOI: 10.1016/j.forsciint.2006.02.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Revised: 01/25/2006] [Accepted: 02/05/2006] [Indexed: 10/24/2022]
Abstract
Human genome, pharmaceutical and research laboratories have long enjoyed the application of robotics to performing repetitive laboratory tasks. However, the utilization of robotics in forensic laboratories for processing casework samples is relatively new and poses particular challenges. Since the quantity and quality (a mixture versus a single source sample, the level of degradation, the presence of PCR inhibitors) of the DNA contained within a casework sample is unknown, particular attention must be paid to procedural susceptibility to contamination, as well as DNA yield, especially as it pertains to samples with little biological material. The Virginia Department of Forensic Science (VDFS) has successfully automated forensic casework DNA extraction utilizing the DNA IQ(trade mark) System in conjunction with the Biomek 2000 Automation Workstation. Human DNA quantitation is also performed in a near complete automated fashion utilizing the AluQuant Human DNA Quantitation System and the Biomek 2000 Automation Workstation. Recently, the PCR setup for casework samples has been automated, employing the Biomek 2000 Automation Workstation and Normalization Wizard, Genetic Identity version, which utilizes the quantitation data, imported into the software, to create a customized automated method for DNA dilution, unique to that plate of DNA samples. The PCR Setup software method, used in conjunction with the Normalization Wizard method and written for the Biomek 2000, functions to mix the diluted DNA samples, transfer the PCR master mix, and transfer the diluted DNA samples to PCR amplification tubes. Once the process is complete, the DNA extracts, still on the deck of the robot in PCR amplification strip tubes, are transferred to pre-labeled 1.5 mL tubes for long-term storage using an automated method. The automation of these steps in the process of forensic DNA casework analysis has been accomplished by performing extensive optimization, validation and testing of the software methods.
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Affiliation(s)
- S A Greenspoon
- Virginia Department of Forensic Science, Richmond, VA 23219, USA.
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Abstract
The objective of this research was to use a Rapid Visco Analyzer to study the effect of natural cheese age, trisodium citrate (TSC) concentration, and mixing speed on process cheese food (PCF) functionality. In this study 3 replicates of natural cheese were manufactured, and a portion of each cheese was subjected to 6 different PCF manufacturing treatments at 2, 4, 6, 12, and 18 wk of ripening. These treatments were factorial combinations of 3 levels of TSC (i.e., 2.0, 2.5, and 3.0%) and 2 mixing speeds during manufacture (450 and 1,050 rpm). Functional properties of the PCF evaluated included manufacturing properties [apparent viscosity after manufacture (VAM)], unmelted textural properties (firmness), melted cheese flow properties [hot apparent viscosity (HAV)], and cheese thickening during cooling [time at 5000 cP (T5)]. All 4 parameters (VAM, firmness, HAV, and T5) were significantly affected by natural cheese age and mixing speed, whereas VAM, HAV, and T5 were also significantly influenced by the amount of TSC. The VAM and firmness decreased as cheese age increased, whereas T5 values increased as cheese age increased. Similarly, VAM, HAV, and firmness values increased because of the increased mixing speed, whereas T5 values decreased. The age x mixing speed interaction was significant for VAM and firmness. The age x concentration of the TSC interaction term was significant for VAM, whereas the age x age x TSC concentration term was significant for HAV. The results demonstrate that natural cheese age, mixing speed during manufacture, and concentration of TSC have a significant impact on process cheese functionality.
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Affiliation(s)
- S K Garimella Purna
- Minnesota-South Dakota Dairy Foods Research Center, Department of Food Science and Nutrition, University of Minnesota, St. Paul 55108, USA
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27
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Affiliation(s)
- A Pollard
- The Biochemical Department, Imperial College of Science and Technology, South Kensington, and the Wills Physical Laboratory, University of Bristol
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Affiliation(s)
- A Pollard
- The Biochemical Department, Imperial College of Science and Technology, South Kensington, London
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Affiliation(s)
- A C Chibnall
- The Biochemical Department, Imperial College of Science and Technology, South Kensington, and the Wills Physical Laboratory, University of Bristol
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Affiliation(s)
- A Pollard
- The Biochemical Department, Imperial College of Science and Technology, South Kensington, and the Wills Physical Laboratory, University of Bristol
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31
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Affiliation(s)
- A Pollard
- The Biochemical Department, Imperial College of Science and Technology, South Kensington, and the Courtauld Institute of Biochemistry, The Middlesex Hospital
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Piper SH, Chibnall AC, Hopkins SJ, Pollard A, Smith JA, Williams EF. Synthesis and crystal spacings of certain long-chain paraffins, ketones and secondary alcohols. Biochem J 2006; 25:2072-94. [PMID: 16744779 PMCID: PMC1260845 DOI: 10.1042/bj0252072] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- S H Piper
- The Wills Physical Laboratory, University of Bristol, and the Biochemical Department, Imperial College of Science and Technology, South Kensington
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Chibnall AC, Piper SH, Pollard A, Williams EF, Sahai PN. The constitution of the primary alcohols, fatty acids and paraffins present in plant and insect waxes. Biochem J 2006; 28:2189-208. [PMID: 16745627 PMCID: PMC1253456 DOI: 10.1042/bj0282189] [Citation(s) in RCA: 153] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- A C Chibnall
- The Biochemical Department, Imperial College of Science and Technology, South Kensington, and the Wills Physical Laboratory, University of Bristol
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Karageorgos L, Harmatz P, Simon J, Pollard A, Clements PR, Brooks DA, Hopwood JJ. Mutational analysis of mucopolysaccharidosis type VI patients undergoing a trial of enzyme replacement therapy. Hum Mutat 2004; 23:229-33. [PMID: 14974081 DOI: 10.1002/humu.10313] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [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: 11/09/2022]
Abstract
Mucopolysaccharidosis type VI (MPS VI), or Maroteaux-Lamy syndrome, is a lysosomal storage disorder caused by a deficiency of N-acetylgalactosamine-4-sulfatase (ARSB). Seven MPS VI patients were chosen for the initial clinical trial of enzyme replacement therapy. Direct sequencing of genomic DNA from these patients was used to identify ARSB mutations. Each individual exon of the ARSB gene was amplified by PCR and subsequently sequenced. Nine substitutions (c.289C>T [p.Q97X], c.629A>G [p.Y210C], c.707T>C [p.L236P], c.936G>T [p.W312C], c.944G>A [p.R315Q], c.962T>C [p.L321P], c.979C>T [p.R327X], c.1151G>A [p.S384N], and c.1450A>G [p.R484G]), two deletions (c.356_358delTAC [p.Y86del] and c.427delG), and one intronic mutation (c.1336+2T>G) were identified. A total of 7 out of the 12 mutations identified were novel (p.Y86del, p.Q97X, p.W312C, p.R327X, c.427delG, p.R484G, and c.1336+2T>G). Two of these novel mutations (p.Y86del and p.W312C) were expressed in Chinese hamster ovary cells and analyzed for residual ARSB activity and mutant ARSB protein. The two common polymorphisms c.1072G>A [p.V358M] and c.1126G>A [p.V376M] were identified among the patients, along with the silent mutation c.1191A>G. Cultured fibroblast ARSB mutant protein and residual activity were determined for each patient, and, together with genotype information, were used to predict the expected clinical severity of each MPS VI patient.
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Affiliation(s)
- L Karageorgos
- Lysosomal Diseases Research Unit, Department of Genetic Medicine, Women's and Children's Hospital, North Adelaide, Australia
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36
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Bingham SJ, Buch MH, Lindsay S, Pollard A, White J, Emery P. Parenteral methotrexate should be given before biological therapy. Rheumatology (Oxford) 2003; 42:1009-10. [PMID: 12869673 DOI: 10.1093/rheumatology/keg246] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Campbell L, Pollard A, Roeton C. The development of clinical practice guidelines for the use of aromatherapy in a cancer setting. Aust J Holist Nurs 2001; 8:14-22. [PMID: 11898289] [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: 02/24/2023]
Abstract
The need to develop guidelines for the use of aromatherapy was identified to ensure safe and appropriate use in clinical practice. Therapeutic actions and safety data were reviewed along with literature relating to nurses' use of aromatherapy. A policy was developed with the needs of the oncology patient being the foremost consideration. Methods of administration and dosage of essential oils were stipulated to address safety issues.
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Affiliation(s)
- L Campbell
- Peter MacCallum Cancer Institute, St Andrews Place, East Melbourne, VIC, 3002
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Abstract
Fifty-eight dogs with cranial cruciate ligament deficiency were assessed and treated surgically. At an average of 50 months postoperatively, the functional outcome was assessed by means of an owner-based clinical assessment and a clinical examination. Client-based data were available for 26 dogs and 20 dogs were reassessed after 50 months. The results were compared with the initial values and with data from an assessment 13 months postoperatively. The level of disability at 50 months was judged to be significantly less than initially. However, there were no differences between the initial assessments and those made after 50 months for the perceived 'effect of cold weather' and the dogs' 'ability to jump', despite both measures having improved after 13 months. Age and meniscal injury were identified as poor prognostic indicators for the long-term outcome. The equivalent joint on the contralateral limb deteriorated significantly during the study.
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Affiliation(s)
- J F Innes
- Department of Clinical Veterinary Science, University of Bristol, Langford
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Abstract
Studies of two post-mortem pancreata of children at the onset of type I diabetes have suggested activation and expansion of islet infiltrating T cells by a superantigen. We present the first reported case of a superantigen mediated disease, toxic shock syndrome (TSS), occurring at the diagnosis of type I diabetes. A 12-year-old girl presented with TSS and newly diagnosed diabetes with ketoacidosis. At presentation she was unconscious, febrile and hypotensive, with a desquamating erythematous rash and Kussmaul breathing. During resuscitation, her renal impairment, diarrhoea, thrombocytopaenia and ketoacidosis resolved. Vaginal discharge and blood cultures grew Staphylococcus aureus. T cell studies at 2 weeks after diagnosis detected a high level of spontaneous and islet antigen-specific proliferation with associated interleukin-10 production compared to human leucocyte antigen DR matched controls.
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Affiliation(s)
- J J Couper
- Department of Endocrinology, Women's and Children's Hospital, North Adelaide, Australia.
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42
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Colman PG, Steele C, Couper JJ, Beresford SJ, Powell T, Kewming K, Pollard A, Gellert S, Tait B, Honeyman M, Harrison LC. Islet autoimmunity in infants with a Type I diabetic relative is common but is frequently restricted to one autoantibody. Diabetologia 2000; 43:203-9. [PMID: 10753042 DOI: 10.1007/s001250050030] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
AIMS/HYPOTHESIS To determine the sequence of development of islet autoantibodies and their relation to HLA genes in infants at risk for Type I diabetes followed from birth. METHODS We followed 357 (189 male, 168 female) infants, with a first degree relative with Type I diabetes for a mean of 3 years from birth. Human leukocyte antigen typing and assays for insulin autoantibodies (IAA), glutamic acid decarboxylase antibodies (GADAb) and tyrosine phosphatase IA2 (IA2Ab) antibodies were done on cord blood, and venous blood was sampled every 6 months for IAA, GADAb and IA2Ab. RESULTS We did not find any antibodies in 263 (73%) infants; 50 (14%) were positive for a single antibody once, 19 (5%) for a single antibody more than once and 25 (7%) for two or more antibodies. Of the latter, 10 (2.8% overall) were persistently positive; they had higher frequencies of HLA DR4 (p < 0.01) and HLA DR3, 4 (p < 0.05). Of the group persistently positive for two or more antibodies four infants developed diabetes. Insulin autoantibodies were the first ones to develop in 64% of infants with two or more antibodies. CONCLUSION/INTERPRETATION Infants with high risk HLA-DR alleles and multiple antibodies at high risk for diabetes were identified. A much larger group of infants had transient low level increases usually of a single antibody. Whereas transient low level positivity could be attributed to difficulties with assay technique and cut off levels for normality, the results overall support the phenomenon of transient 'self limited' islet autoimmunity in at risk infants.
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Affiliation(s)
- P G Colman
- Department of Diabetes and Endocrinology, The Royal Melbourne Hospital, Victoria, Australia
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Couper JJ, Steele C, Beresford S, Powell T, McCaul K, Pollard A, Gellert S, Tait B, Harrison LC, Colman PG. Lack of association between duration of breast-feeding or introduction of cow's milk and development of islet autoimmunity. Diabetes 1999; 48:2145-9. [PMID: 10535447 DOI: 10.2337/diabetes.48.11.2145] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The hypothesis that early exposure to cow's milk or lack of breast-feeding predisposes to type 1 diabetes remains controversial. We aimed to determine prospectively the relationship of, first, duration of exclusive breast-feeding and total duration of breast-feeding, and second, introduction of cow's milk protein as infant formula, cow's milk, or dairy products, to the development of islet antibodies in early life. Some 317 children with a first-degree relative with type 1 diabetes were followed prospectively from birth for 29 months (4-73). Mothers kept a home diary and answered infant feeding questionnaires at 6-month intervals. No systematic feeding advice was given. Insulin autoantibodies (normal range <5.5%), anti-GAD antibodies (<5.0 U), and anti-IA2 antibodies (<3.0 U) were measured at 6-month intervals. Cox proportional hazards model of survival analysis detected no significant difference between children who did not develop islet antibodies (225 of 317 [71%]), children with one islet antibody raised once (52 of 317 [16.4%]), children with one antibody raised repeatedly (18 of 317 [5.7%]), or children with two or more antibodies raised (22 of 317 [6.9%]), in terms of duration of exclusive breast-feeding, total duration of breast-feeding, or introduction of cow's milk-based infant formulas, cow's milk, or dairy products (relative risk: 0.91-1.09). Four of the children with two or more islet antibodies developed type 1 diabetes. We conclude that there is no prospective association between duration of breast-feeding or introduction of cow's milk and the development of islet autoimmunity in high-risk children.
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Affiliation(s)
- J J Couper
- Department of Endocrinology, Women's and Children's Hospital, North Adelaide SA, Australia.
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44
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Affiliation(s)
- A Pollard
- Peter MacCallum Cancer Institute, Melbourne
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45
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Ormerod RC, Becker HA, Grandmaison EW, Pollard A, Sobiesiak A. Effect of process variables on scale formation in steel reheating. CAN J CHEM ENG 1997. [DOI: 10.1002/cjce.5450750216] [Citation(s) in RCA: 2] [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: 11/10/2022]
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Abstract
BACKGROUND The clinical associations of anti-lamin autoantibodies were first described in 1973. Since then a number of individual case reports and two small series have been published. These have suggested an association with connective tissue disorders and autoimmune liver disease. AIMS To identify the clinical and laboratory associations of anti-lamin autoantibodies in an Australian population. METHODS Retrospective review of routine antinuclear antibody testing between 1990-1994 for characteristics linear staining of nuclear envelope on indirect immunofluorescence on HEp-2 cells with clinical status defined by retrospective review of case records. RESULTS Twenty-eight patients were identified and the clinical status of 27 patients defined. Eleven patients had associated IgG anti-cardiolipin antibodies; anti-phospholipid syndrome was present in nine. Seven further patients had liver disease; five had autoimmune liver disease, with associated autoantibodies. The remaining nine patients had a diverse group of diseases. There was no correlation between the titre of the autoantibody and clinical status. An association with anti-cardiolipin antibodies was found although the cause remains obscure. CONCLUSION Anti-lamin autoantibodies, as identified by indirect immunofluorescence, are associated with a diverse group of diseases but particularly with anti-phospholipid syndrome and liver disease. Testing for anti-phospholipid antibodies and more specific markers of systemic lupus erythematosus and autoimmune disease, for example anti-dsDNA antibodies, anti-smooth muscle antibodies and anti-mitochondrial antibodies should be pursued when anti-lamin autoantibodies are detected.
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Affiliation(s)
- C Hill
- Rheumatology Unit, Queen Elizabeth Hospital, Adelaide, SA
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Abstract
OBJECTIVES To compare a new radioimmunoassay (RIA), measuring vitamin D metabolites, against an established, competitive-protein binding assay (CPBA) that uses rat vitamin D binding protein. METHODS For the CPBA, we first isolated 25-hydroxyvitamin D (25(OH)D) by eluting sample through silica cartridges. For the RIA, serum was added to acetonitrile and centrifuged, followed by RIA using 125I-25(OH)D3. RESULTS The within-run CV was 1.5% to 4.1% by RIA, compared to 8.1% to 15.0% by CPBA. For both methods, analytical recovery was not significantly different from 100%, and both methods were appropriately linear with sample dilution. We compared RIA values (y axis) from 90 subjects with 25(OH)D ranging from 11 to 232 nmol/L by CPBA (x axis). The slope was 0.9992 (not significantly different from 1). However, the RIA exhibited a bias of 11.15 nmol/L (p < 0.05 vs 0), and a correlation coefficient of r = 0.923. When the comparison was confined to the 37 samples in the lower half of our reference range, the RIA did not compare well: slope, 0.764 (p < 0.05 vs 1.0); intercept 18.7 nmol/L (p < 0.05 vs 0); r = 0.517. For the samples below 36 nmol/L by CPBA, there was no discrimination by RIA between the 11 values below, and the 11 above the decision level (25 nmol/L by CPBA) for vitamin D deficiency. CONCLUSIONS We conclude that the RIA is not optimized to detect vitamin D deficiency, and for this purpose it is not a valid substitute for conventional 25(OH)D methods.
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Affiliation(s)
- R Vieth
- Department of Clinical Biochemistry, Mount Sinai Hospital, Toronto, Ontario, Canada
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48
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Pollard A, Friedman T, Aslam M. Tranquillising actions. Nurs Times 1994; 90:34-6. [PMID: 7909149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Abstract
We have determined total protein, albumin, globulins, and urea in unmodified human serum using near-infrared (NIR) spectroscopy. The distinctive NIR spectrum of the individual protein fractions allowed unique spectroscopic models to be derived for each fraction using multiple linear least-squares regression (MLR). A more sophisticated partial least-squares (PLS) regression analysis was necessary to fully extract the relevant spectral information for urea. The serum protein data sets consisted of 235 calibration samples and 85 prediction samples. The total protein calibration yielded a multiple correlation coefficient (R) of 0.986 and a standard error of calibration (SEC) of 1.7 g/L. For the validation data set, a correlation coefficient (r) of 0.985 and standard error of prediction (SEP) of 1.7 g/L were obtained. For albumin, the values were R = 0.982 and SEC = 1.2 g/L for calibration and r = 0.984 and SEP = 1.1 g/L for prediction. Calibration results for globulins were R = 0.916 and SEC = 2.1 g/L; validation results were r = 0.885 and SEP = 2.2 g/L. The sum of the separately estimated albumin and globulin fractions agreed well with the total protein estimate. For urea, the calibration model (n = 422) provided an R = 0.994 and SEC = 0.7 mmol/L and the validation results (n = 208) were r = 0.993 and SEP = 0.8 mmol/L. The within-day and between-day precision values (CVs) were respectively, 1.2 and 1.3% for total protein, 1.7 and 1.1% for albumin, 1.5 and 1.3% for globulins, and 8.3 and 5.5% for urea.
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Affiliation(s)
- J W Hall
- Department of Clinical Biochemistry, Mount Sinai Hospital, Toronto, Ontario, Canada
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Barman D, Dassin R, Pollard A. An evaluation of the Kyoto Daiichi HA 8121 glycated haemoglobin analyzer. Clin Biochem 1993. [DOI: 10.1016/0009-9120(93)90098-q] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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