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Hamilton K, White K. A qualitative study of parental physical activity: Exploring the influence of social support and normative expectations. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hogan A, Hawthorne G, Kethel L, Giles E, White K, Stewart M, Plath B, Code C. Health-related quality-of-life outcomes from adult cochlear implantation: a cross-sectional survey. Cochlear Implants Int 2009; 2:115-28. [PMID: 18792093 DOI: 10.1179/cim.2001.2.2.115] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
PURPOSE The purpose of this study was to examine the extent to which cochlear implants and related rehabilitation improve health-related quality-of-life (HRQoL) and social participation for deafened adults and their partners. METHOD A cross-sectional survey was used to examine HRQoL and social participation experiences of 202 deafened adults (148 with implants and 54 without) and 136 partners associated with cochlear implant clinics in Australia and New Zealand. Respondents completed a mailed survey consisting of the Assessment of Quality of Life instrument (a utility instrument), the Participation Scale and questions concerning their socioeconomic status. Both univariate and multivariate analyses were performed. RESULTS Controlling for socioeconomic factors, people with cochlear implants reported improved HRQoL and social participation when compared with non-implantees. Implantees reported a relative gain in health utility of 50%, and a relative improvement in social participation of 31%. Such differences were not reported by partners, although patient and partner HRQoL were weakly correlated. CONCLUSION The results of this cross-sectional study suggest that cochlear implantation contributes significantly to improvements for deafened adults in everyday communication settings and makes a major contribution to their HRQoL. Nonetheless, when compared with population-based studies, this population continues to report considerably reduced quality of life. Partners also report significantly reduced quality of life when compared to population norms.
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Affiliation(s)
- A Hogan
- School of Communication Sciences and Disorders, Faculty of Health Sciences, University of Sydney, NSW 2006, Australia
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Metzger H, Blank U, Kinet JP, Kochan J, Ra C, Rivera J, White K. Emerging Picture of the Receptor with High Affinity for IgE. Int Arch Allergy Immunol 2009. [DOI: 10.1159/000234740] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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154
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White K, Whisman B, Letz A, Moore M, Quinn J. Cross-Allergenicity Between American and Cedar Elm. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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155
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156
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Grossman D, Hopkins K, Talavera V, Shedlin M, White K, Amastae J, Potter J. Knowledge, perceptions and use of emergency contraception among Latina oral contraceptive users in Texas. Contraception 2008. [DOI: 10.1016/j.contraception.2008.04.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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157
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Wahba IM, Simpson EL, White K. Authors Reply to: Gadolinium Exposure in Organ Donors May Cause Nephrogenic Systemic Fibrosis in Transplant Recipients Never Exposed to Gadolinium. Am J Transplant 2008. [DOI: 10.1111/j.1600-6143.2008.02194.x] [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: 11/26/2022]
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158
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Abstract
Although smoking cessation is a prerequisite prior to listing for cardiac transplantation, some patients return to smoking after recovery. We have covertly assessed the smoking habits of our cardiac transplant recipients (with ethical approval) since 1993 by measuring urinary cotinine: a level of >500 ng/mL signifying continued tobacco use. We retrospectively analyzed survival, causes of death and the development of graft coronary artery disease (GCAD) with respect to the number of positive and negative cotinine levels. One hundred four of 380 (27.4%) patients tested positive for active smoking at some point posttransplant, and 57 (15.0%) tested positive repeatedly. Smokers suffered significantly more deaths due to GCAD (21.2% vs. 12.3%, p < 0.05), and due to malignancy (16.3% vs. 5.8%, p < 0.001). In univariate analysis, smoking after heart transplantation shortened median survival from 16.28 years to 11.89 years. After correcting for the effects of pretransplant smoking in time-dependent multivariate analysis, posttransplant smoking remained the most significant determinant of overall mortality (p < 0.00001). We conclude that tobacco smoking after cardiac transplantation significantly impacts survival by accelerating the development of graft vasculopathy and malignancy. We hope that this information will deter cardiac transplant recipients from relapsing, and intensify efforts in improving cessation rates.
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Affiliation(s)
- P Botha
- Department of Cardiopulmonary Transplantation, Freeman Hospital, High Heaton, Newcastle upon Tyne, UK.
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White K, Büning H, Kritz A, Janicki H, McVey J, Perabo L, Murphy G, Odenthal M, Work LM, Hallek M, Nicklin SA, Baker AH. Engineering adeno-associated virus 2 vectors for targeted gene delivery to atherosclerotic lesions. Gene Ther 2007; 15:443-51. [PMID: 18004401 DOI: 10.1038/sj.gt.3303077] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Targeted delivery of biological agents to atherosclerotic plaques may provide a novel treatment and/or useful tool for imaging of atherosclerosis in vivo. However, there are no known viral vectors that possess the desired tropism. Two plaque-targeting peptides, CAPGPSKSC (CAP) and CNHRYMQMC (CNH) were inserted into the capsid of adeno-associated virus 2 (AAV2) to assess vector retargeting. AAV2-CNH produced significantly higher levels of transduction than unmodified AAV2 in human, murine and rat endothelial cells, whereas transduction of nontarget HeLa cells was unaltered. Transduction studies and surface plasmon resonance suggest that AAV2-CNH uses membrane type 1 matrix metalloproteinase as a surface receptor. AAV2-CAP only produced higher levels of transduction in rat endothelial cells, possibly because the virus was found to be affected by proteasomal degradation. In vivo substantially higher levels of both peptide-modified AAV2 vectors was detected in the brachiocephalic artery (site of advanced atherosclerotic plaques) and aorta, whereas reduced levels were detected in all other organs examined. These results suggest that in the AAV2 platform the peptides are exposed on the capsid surface in a way that enables efficient receptor binding and so creates effective atherosclerotic plaque targeted vectors.
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Affiliation(s)
- K White
- British Heart Foundation Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK
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Wahba IM, Simpson EL, White K. Gadolinium is not the only trigger for nephrogenic systemic fibrosis: insights from two cases and review of the recent literature. Am J Transplant 2007; 7:2425-32. [PMID: 17711550 DOI: 10.1111/j.1600-6143.2007.01941.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [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: 01/25/2023]
Abstract
Nephrogenic systemic fibrosis (NSF) is an emerging fibrosing disease with serious consequences in patients with acute and chronic kidney disease including solid organ and renal transplant recipients. It has recently been linked to gadolinium exposure. Almost all recently reported cases of NSF were found to be preceded by gadolinium administration, which led the FDA to issue a warning against the use of gadolinium in patients with moderate-to-severe reduction in the glomerular filtration rate. We report two organ transplant recipients who developed NSF and in whom extensive record review failed to document any prior gadolinium exposure. We then critically review the recently published literature linking NSF and gadolinium and we propose other possible triggers. We conclude that gadolinium is not the only trigger for NSF, and that the search for other triggers should be sought. We believe that this information is an important addition to the NSF literature, such that the definitive etiology and pathogenesis of NSF can be researched.
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Affiliation(s)
- I M Wahba
- Division of Nephrology and Hypertension, Department of Medicine, Oregon Health & Science University, Portland, OR, USA.
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Abstract
The guiding principle of health care is to serve the needs of the public. Healthcare services are therefore required to be increasingly flexible and open to new approaches to meet changing demands. They must also adjust and expand as new challenges are presented. Public awareness of mental health issues and the current demands placed on health services for access to affordable and appropriate mental health care have never been so great. The introduction of nurse practitioners (NPs) in Australia is a proud and long-anticipated moment for the discipline of nursing. However, a major challenge for the introduction of NPs in Australia will be to reassure medical colleagues, allied health professionals and the public that NPs are able to deliver high-quality primary care. This paper elaborates on the progress of the mental health NP role in Australia. Attention is centred on the characteristics the mental health NP role, the maintenance of professional competency to practise at an advanced clinical level, and the prospects and potential significance of NPs for mental health nursing practice. The nurse-led clinic, implemented through the process of consultation and systematic evaluation, is identified as an avenue for the extension of mental health NP practice in the delivery of autonomous primary care.
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Affiliation(s)
- T Wand
- Emergency Department, Royal Prince Alfred Hospital, Missenden Road, Camperdown, NSW 2050, Australia.
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Affiliation(s)
- K. White
- Psychology Department, University of Queensland , Sf. Luciu, 4067
| | - R. Ashton
- Psychology Department, University of Queensland , Sf. Luciu, 4067
| | - H. Law
- Psychology Department, University of Queensland , Sf. Luciu, 4067
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Nattress K, White K, Davidson M, Shipman F, McKenzie H, Cahill P, Bishop J. 8132 POSTER An innovative collaboration to develop cancer nursing education in rural Australia. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71634-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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164
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Fredrickson K, McLaren RP, Enger KS, White K, Kirsch B, Canavan BC, Zimmerman LA, Bartlett DL, Williams WG. Influenza vaccination coverage among children aged 6-23 months - six immunization information system sentinel sites, United States, 2005-06 influenza season. MMWR Morb Mortal Wkly Rep 2006; 55:1329-30. [PMID: 17167396] [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: 05/13/2023]
Abstract
Beginning with the 2004-05 influenza season, the Advisory Committee on Immunization Practices (ACIP) recommended that all children aged 6-23 months receive influenza vaccinations annually. Other children recommended to receive influenza vaccinations include those aged 6 months-18 years who have certain high-risk medical conditions, those on chronic aspirin therapy, those who are household contacts of persons at high risk for influenza complications, and, since 2006, all children aged 24-59 months. Previously unvaccinated children aged <9 years need 2 doses administered at least 1 month apart to be considered fully vaccinated. This report assesses influenza vaccination coverage among children aged 6-23 months during the 2005-06 influenza season by using data from six immunization information system (IIS) sentinel sites. The findings demonstrate that vaccination coverage with 1 or more doses varied widely (range: 6.6% to 60.4%) among sites, with coverage increasing from the preceding influenza season in four of the six sites. However, <23% of children in five of the sites were fully vaccinated, underscoring the need for increased measures to improve the proportion of children who are fully vaccinated.
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165
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Michailova P, Petrova N, Ilkova J, Bovero S, Brunetti S, White K, Sella G. Genotoxic effect of copper on salivary gland polytene chromosomes of Chironomus riparius Meigen 1804 (Diptera, Chironomidae). Environ Pollut 2006; 144:647-54. [PMID: 16533547 DOI: 10.1016/j.envpol.2005.12.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2004] [Accepted: 12/29/2005] [Indexed: 05/07/2023]
Abstract
The genotoxic action of copper (Cu) on the polytene chromosomes of Chironomus riparius was investigated by analysing structural and functional chromosome aberrations of fourth instars larvae hatched from eggs subject to acute (48 h) exposure with three environmentally relevant concentrations of aqueous Cu (0.005, 0.01, 0.05 mg/l). A dose dependent relationship was observed between Cu concentration and frequency of chromosomal aberrations. A significantly higher frequency of functional alterations, specifically decondensed centromeres and telomeres, and reduction in activity of Balbiani rings, was observed in treated material compared to control. A comparison of breakpoints resulting from treatment with chromium and lead from earlier studies with those Cu-induced identified a series of chromosomal weak points particularly vulnerable to trace metals. We also show that the appearance of structural and functional chromosome aberrations are more sensitive indicators of acute Cu toxicity in chironomid larvae than changes in external morphology.
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Affiliation(s)
- P Michailova
- Institute of Zoology, Bulgarian Academy of Sciences, 1 Tzar Osvoboditel boul., Sofia 1000, Bulgaria.
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166
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Blekher T, Johnson SA, Marshall J, White K, Hui S, Weaver M, Gray J, Yee R, Stout JC, Beristain X, Wojcieszek J, Foroud T. Saccades in presymptomatic and early stages of Huntington disease. Neurology 2006; 67:394-9. [PMID: 16855205 DOI: 10.1212/01.wnl.0000227890.87398.c1] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [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: 11/15/2022] Open
Abstract
OBJECTIVE To evaluate quantitative measures of eye movements as possible biomarkers in prediagnostic and early stages of Huntington disease (HD). METHODS The study sample (n = 215) included individuals both at risk and recently diagnosed with HD. All participants completed a uniform clinical evaluation which included administration of the Unified Huntington's Disease Rating Scale (UHDRS) by a movement disorder neurologist and molecular testing to determine HD gene status. A high resolution, video-based eye tracking system was employed to quantify measures of eye movement (error rates, latencies, SD of latencies, velocities, and accuracies) during a computerized battery of saccadic and steady fixation tasks. RESULTS Prediagnostic HD gene carriers and individuals with early HD demonstrated three types of significant abnormalities while performing memory guided and anti-saccade tasks: increased error rate, increased saccade latency, and increased variability of saccade latency. The eye movement abnormalities increased with advancing motor signs of HD. CONCLUSIONS Abnormalities in eye movement measures are a sensitive biomarker in the prediagnostic and early stages of Huntington disease (HD). These measures may be more sensitive to prediagnostic changes in HD than the currently employed neurologic motor assessment.
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Affiliation(s)
- T Blekher
- Department of Ophthalmology, Indiana University School of Medicine, Indianapolis 46202-5251, USA.
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167
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Affiliation(s)
- H G Bray
- Department of Physiology, Medical School, University of Birmingham
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168
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Bray HG, Thorpe WV, White K. The fate of certain organic acids and amides in the rabbit. 10. The application of paper chromatography to metabolic studies of hydroxybenzoic acids and amides. Biochem J 2006; 46:271-5. [PMID: 16748674 PMCID: PMC1275129 DOI: 10.1042/bj0460271] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- H G Bray
- Department of Physiology, Medical School, University of Birmingham
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169
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Dickinson W, Ferreyra J, Imbesi KL, Joshi S, Kingsolver C, Klein E, Lessios N, Ng A, Stamp T, White K, Xu D, Vidra RL. The Ethical Challenges Faced by Ecological Restorationists. ECOL RESTOR 2006. [DOI: 10.3368/er.24.2.102] [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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170
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Abstract
In recent years, there has been a growing awareness of the need to take account of the patient's own experience of illness. Although this is to be welcomed, it is also important to hear the stories of those most affected by the patient's illness, their partners, their families, their communities and those who care for them. 'On being both professional and human: one woman's journey' provides a powerful example of how narrative may assist clinicians to learn about communication, care, presence and the effect of illness and death on those left behind.
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Affiliation(s)
- I H Kerridge
- Centre for Values, Ethics and the Law in Medicine, University of Sydney, Sydney, New South Wales, Australia.
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171
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Farboodmanesh S, Chen J, Mead J, White K. Effect of Construction on Mechanical Behavior of Fabric Reinforced Rubber. Rubber Chemistry and Technology 2006. [DOI: 10.5254/1.3547933] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Fabrics coated with rubber have wide applications in fields such as medical substrates, protective clothing, and flexible membranes for civil structures, airbags, geotextiles and industrial fabrics. As the market for coated fabrics expands to applications with more complex geometries and loading conditions, a competitive edge can be gained by optimizing the selection of fabric substrate and coating materials. This work includes a detailed experimental study of the effect of various parameters such as weave pattern, yarn size, and coating thickness on rubber coated fabric mechanical response. Nine types of woven PET fabrics were fabricated, consisting of the same warp yarn size and count, but different fill yarns (220, 500, and 1000 denier) and weave patterns (plain weave, 4-harness satin weave, and 8-harness satin weave). The fabrics were coated with neoprene latex using a dip-coating process. The coating penetration was much greater for the two-ply warp yarns than the fill yarns. Both coated and uncoated fabrics were tested. Shear tests and microscopy were used to understand the interaction between the fabric structure and the rubber coating. Results suggest that the shear behavior of the rubber-coated fabric is dominated by the rubber at low shear angles and by the fabric at higher shear angles. These results improve our ability to predict and prevent undesirable behaviors such as wrinkling, distortion and tear.
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Affiliation(s)
- S. Farboodmanesh
- 1James B. Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854;
| | - J. Chen
- 1James B. Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854;
| | - J. Mead
- 1James B. Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854;
| | - K. White
- 1James B. Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854;
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172
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Thornton V, Lennon D, Rasanathan K, O'Hallahan J, Oster P, Stewart J, Tilman S, Aaberge I, Feiring B, Nokleby H, Rosenqvist E, White K, Reid S, Mulholland K, Wakefield MJ, Martin D. Safety and immunogenicity of New Zealand strain meningococcal serogroup B OMV vaccine in healthy adults: Beginning of epidemic control. Vaccine 2006; 24:1395-400. [PMID: 16242221 DOI: 10.1016/j.vaccine.2005.09.043] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [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: 02/01/2005] [Revised: 05/25/2005] [Accepted: 09/09/2005] [Indexed: 11/17/2022]
Abstract
As the first step towards control of a strain specific epidemic of meningococcal disease in New Zealand (NZ), this study, an observer-blind, randomised controlled trial in 75 healthy adults, evaluated safety and immunogenicity of two different dosages of a meningococcal group B vaccine administered in a three dose regime. The "tailor-made" outer membrane vesicle (OMV) vaccine (candidate vaccine) developed using a New Zealand meningococcal group B strain (B:4:P1.7b,4) was well tolerated with no vaccine related serious adverse events. Similar local and systemic reactions were observed in those receiving the New Zealand candidate vaccine and the control parent Norwegian vaccine (MenBvac). A four-fold rise in serum bactericidal antibodies (SBAb) against the vaccine strain 4-6 weeks after the third vaccination was achieved in 100% of New Zealand candidate vaccine 2,519 microg participants and in 87% of 50 microg participants. The safety and immunogenicity profile observed in this study of healthy adults enabled studies in children to be initiated using 25 microg dosage.
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Affiliation(s)
- V Thornton
- The University of Auckland, Meningococcal B Project, P.O. Box 98847, South Auckland Mail Centre, Auckland, New Zealand
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Baron F, Piette F, Maris M, Storek J, Metcalf M, White K, Sandmaier B, Maloney D, Storer B, Storb R, Boeckh M. Factors affecting immunologic recovery after nonmyeloablative conditioning. Biol Blood Marrow Transplant 2006. [DOI: 10.1016/j.bbmt.2005.11.260] [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: 10/25/2022]
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Ogunsalu C, Daisley H, Henry K, Bedayse S, White K, Jagdeo B, Baldeo S. A new radiological classification for ameloblastoma based on analysis of 19 cases. W INDIAN MED J 2006; 55:434-9. [PMID: 17691241 DOI: 10.1590/s0043-31442006000600013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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 To describe ameloblastoma of the jawbone in young Jamaicans, with special emphasis on radiological findings, and to introduce a radiological classification which could assist in the categorization of these cases according to their biological behaviour and hence their subsequent surgical and medical management. SUBJECTS AND METHODS The series comprised all the 18 cases of ameloblastoma of the jaw seen in patients under the age of 20 years in the two major hospitals in Jamaica with an oral and maxillofacial surgery department from 1980 to 1995. Radiological and histological diagnosis was confirmed in all. A case of maxillary ameloblastoma in a 13-year old girl seen in the year 2000 was also included in this study. This last case had special attributes. RESULTS All 19 patients had primary lesions of ameloblastoma. The mean age was 16.1 years with a mode of 18 years and a range of 13 to 19 years. The male to female ratio was 1.1:1. Eighteen cases were seen in the mandible and one case in the maxilla. Of these, 42% were unilocular and 58% were multilocular radiologically. Thirty-two per cent of cases had unerupted teeth associated with the lesions and 32% had root resorption. Based on our new radiological classification, the most predominant radiological type was IIb2 with root resorption (42%). There was no radiological type classically simulating dentigerous cyst (Ia2). CONCLUSION Ameloblastoma in young Jamaicans presented more in the adolescent period and are predominantly unicystic and rare in the maxilla. A new classification for ameloblastoma based solely on radiological presentation is adopted.
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Affiliation(s)
- C Ogunsalu
- Oral Diseases Unit, School of Dentistry, Faculty of Medical Sciences, The University of the West Indies, St Augustine, Trinidad and Tobago.
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Begley TH, White K, Honigfort P, Twaroski ML, Neches R, Walker RA. Perfluorochemicals: Potential sources of and migration from food packaging. ACTA ACUST UNITED AC 2005; 22:1023-31. [PMID: 16227186 DOI: 10.1080/02652030500183474] [Citation(s) in RCA: 262] [Impact Index Per Article: 13.8] [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: 10/25/2022]
Abstract
Perfluorochemicals are widely used in the manufacturing and processing of a vast array of consumer goods, including electrical wiring, clothing, household and automotive products. Furthermore, relatively small quantities of perfluorochemicals are also used in the manufacturing of food-contact substances that represent potential sources of oral exposure to these chemicals. The most recognizable products to consumers are the uses of perfluorochemicals in non-stick coatings (polytetrafluoroethylene (PTFE)) for cookware and also their use in paper coatings for oil and moisture resistance. Recent epidemiology studies have demonstrated the presence of two particular perfluorochemicals, perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in human serum at very low part per billion levels. These perfluorochemicals are biopersistent and are the subject of numerous studies investigating the many possible sources of human exposure. Among the various uses of these two chemicals, PFOS is a residual impurity in some paper coatings used for food contact and PFOA is a processing aid in the manufacture of PTFE used for many purposes including non-stick cookware. Little information is available on the types of perfluorochemicals that have the potential to migrate from perfluoro coatings into food. One obstacle to studying migration is the difficulty in measuring perfluorochemicals by routine conventional analytical techniques such as GC/MS or LC-UV. Many perfluorochemicals used in food-contact substances are not detectable by these conventional methods. As liquid chromatography-mass spectrometry (LC/MS) develops into a routine analytical technique, potential migrants from perfluoro coatings can be more easily characterized. In this paper, data will be presented on the types of perfluoro chemicals that are used in food packaging and cookware. Additionally, research will be presented on the migration or potential for migration of these chemicals into foods or food simulating liquids. Results from migration tests show mg kg(-1) amounts of perfluoro paper additives/coatings transfer to food oil. Analysis of PTFE cookware shows residual amounts of PFOA in the low microg kg(-1) range. PFOA is present in microwave popcorn bag paper at amounts as high as 300 microg kg(-1).
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Affiliation(s)
- T H Begley
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD 20740, USA.
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176
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Dallo FJ, White K, Borrell LN. 210: Trends in the Prevalence of Diabetes Mellitus by Race/Ethnicity and Educational Attainment. Am J Epidemiol 2005. [DOI: 10.1093/aje/161.supplement_1.s53a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F J Dallo
- University of Michigan, Ann Arbor, MI 48104
| | - K White
- University of Michigan, Ann Arbor, MI 48104
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177
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White K, Sibata C, Jenkins T, Wolfe M, Patel R, Allison R. SU-FF-J-82: Use of CT Based IGRT for Daily Set-Up of Frameless Fractionated Stereotactic Patients. Med Phys 2005. [DOI: 10.1118/1.1997628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Mota H, Sibata C, Sasidharan S, White K, Wolfe M, Jenkins T, Patel R, Allison R. SU-FF-T-147: Improved Calibration Method of EDR Films for IMRT-QA. Med Phys 2005. [DOI: 10.1118/1.1997818] [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: 11/07/2022] Open
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179
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Abstract
The Drosophila epidermal growth factor receptor (EGFR), functioning through the Ras/Raf/MAPK pathway, promotes cell proliferation and differentiation. Recent work has demonstrated that EGFR functions via the same Ras/Raf/MAPK pathway to promote cell survival. This review summarizes the role of EGFR in differentiation and survival during Drosophila eye development.
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Affiliation(s)
- P Kurada
- Cutaneous Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, USA
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180
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Moscucci M, Fox KAA, Cannon CP, Klein W, López-Sendón J, Montalescot G, White K, Goldberg RJ. Predictors of major bleeding in acute coronary syndromes: the Global Registry of Acute Coronary Events (GRACE). Eur Heart J 2003; 24:1815-23. [PMID: 14563340 DOI: 10.1016/s0195-668x(03)00485-8] [Citation(s) in RCA: 649] [Impact Index Per Article: 30.9] [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: 01/01/2023] Open
Abstract
AIMS There have been no large observational studies attempting to identify predictors of major bleeding in patients with acute coronary syndromes (ACS), particularly from a multinational perspective. The objective of our study was thus to develop a prediction rule for the identification of patients with ACS at higher risk of major bleeding. METHODS AND RESULTS Data from 24045 patients from the Global Registry of Acute Coronary Events (GRACE) were analysed. Factors associated with major bleeding were identified using logistic regression analysis. Predictive models were developed for the overall patient population and for subgroups of patients with ST-segment elevation myocardial infarction (STEMI), non-ST-segment elevation myocardial infarction (NSTEMI) and unstable angina. The overall incidence of major bleeding was 3.9% (4.8% in patients with STEMI, 4.7% in patients with NSTEMI and 2.3% in patients with unstable angina). Advanced age, female sex, history of bleeding, and renal insufficiency were independently associated with a higher risk of bleeding (P<0.01). The association remained after adjustment for hospital therapies and performance of invasive procedures. After adjustment for a variety of potential confounders, major bleeding was significantly associated with an increased risk of hospital death (adjusted odds ratio 1.64, 95% confidence interval 1.18, 2.28). CONCLUSIONS In routine clinical practice, major bleeding is a relatively frequent non-cardiac complication of contemporary therapy for ACS and it is associated with a poor hospital prognosis. Simple baseline demographic and clinical characteristics identify patients at increased risk of major bleeding.
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Affiliation(s)
- M Moscucci
- University of Michigan Health System, Ann Arbor, MI 48109, USA.
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181
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Nathwani D, McIntyre PG, White K, Shearer AJ, Reynolds N, Walker D, Orange GV, Fooks AR. Fatal human rabies caused by European bat Lyssavirus type 2a infection in Scotland. Clin Infect Dis 2003; 37:598-601. [PMID: 12905146 DOI: 10.1086/376641] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [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: 02/19/2003] [Accepted: 03/31/2003] [Indexed: 11/03/2022] Open
Abstract
We wish to report the first recorded case of indigenous human rabies caused by a bat bite in the United Kingdom in 100 years. This instructive case report highlights a number of key lessons: first, bites from insectivorous bats indiginous to the United Kingdom can cause rabies in humans; second, rabies immunization is essential for bat-handlers, and postexposure treatment for rabies is essential for patients bitten by bats; third, patients able to give a history who present with acute flaccid paralysis and/or presumptive viral encephalitis should be asked if they have been bitten by bats, irrespective of travel history, or this history should be obtained from family or friends; fourth, antemortem diagnosis of bat rabies (EBLV type 2a infection) in humans is possible using RT-PCR.
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Affiliation(s)
- D Nathwani
- Department of Infectious Diseases, Ninewells Hospital and Medical School, University of Dundee, Dundee, Scotland.
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182
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Rand TG, White K, Logan A, Gregory L. Histological, immunohistochemical and morphometric changes in lung tissue in juvenile mice experimentally exposed to Stachybotrys chartarum spores. Mycopathologia 2003; 156:119-31. [PMID: 12733633 DOI: 10.1023/a:1022920205355] [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: 11/12/2022]
Abstract
Stachybotrys chartarum is an important toxigenic fungus often associated with chronically wet cellulose-based building materials. The purpose of this study was to evaluate some histological, immunohistochemical and morphometric changes in mouse lung tissues exposed intratracheally to either 50 microl of 1.4 x 10(6) S. chartarum spores (< or = 35 ng toxin/kg BW), isosatratoxin-F (35 ng/kg BW), 50 microl of 1.4 x 10(6) Cladosporium cladosporioides spores, or 50 microl saline. Exposure of lung tissues to S. chartarum or C. cladosporioides spores resulted in granuloma formation at the sites of spore impaction. Some of the lung tissues impacted by S. chartarum spores also showed erythrocyte accumulation in the alveolar air space, dilated capillaries engorged with erythrocytes, and hemosiderin accumulation at spore impaction sites, which were features not noted in the C. cladosporioides-spore treated animals. Immunohistochemistry revealed reduced collagen IV distribution in lung granulomas in S. chartarum-treated animals especially at 48 and 72 hr post-exposure compared to that in lungs of mice with C. cladosporioides-spore induced granulomas. Quantitative analysis of pooled S. chartarum and C. cladosporioides spore impacted lungs revealed significant depression (P < 0.05) of alveolar air space from 71.4 +/- 6.1% in untreated animals to 56.04 +/- 6.1% in the S. chartarum- and 60.24 +/- 5.5% in the C. cladosporioides-spore treated animals. It also revealed that alveolus air space in S. chartarum treated animals declined significantly from 63.74 +/- 3.1% at 12 hr post-exposure to 42.94 +/- 7.9% at 72 hr post-exposure and was increased to 54.84 +/- 5.2% at 96 hr post-exposure. Alveolus air space in C. cladosporioides treated animals also decreased significantly from 64.84 +/- 7.1% at 12 hr exposure to 54.94 +/- 5.4% at 48 hr post-exposure and was increased to 64.64 +/- 10.1% at 96 hr post-exposure. It also revealed significant (P < 0.05) alveolar accumulation of erythrocytes from 1.24 +/- 1.4% in the untreated animals to 3.44 +/- 1.5% in the pooled S. chartarum spore treated animals. Erythrocyte abundance in S. chartarum treated animals increased significantly (P < 0.001) from 2.14 +/- 1.7% at 12 hr post-exposure to 5.54 +/- 1.5% at 72 hr and 4.94 +/- 1.4% at 96 hr post-exposure. These results further reveal that exposure to S. chartarum spores elicit tissue responses in vivo significantly different from those associated with exposure to pure trichothecene toxin and to spores of a non-toxigenic fungus.
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Affiliation(s)
- T G Rand
- Department of Biology Saint Mary's University, Halifax, Nova Scotia, Canada, B3H 3C3.
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183
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Abstract
OBJECTIVE This cross-sectional qualitative study used semi-structured telephone interviews with palliative care nurses working in urban and rural settings in Australia to explore their experiences of dealing with patients with malignant, often malodorous, wounds. METHOD This paper was the second phase of a research project examining the care of patients with malignant wounds. Of 71 palliative care nurses in New South Wales invited to participate, 26 took part, 17 of them working in community positions. The data from the telephone interviews were transcribed and analysed, using content analysis, and coded for themes relating to the nurses' experiences of caring for this patient group. RESULTS Nurses working in this setting strove to do the best for patients and their families under circumstances that are emotionally and physically difficult. Some of them suffered personal distress as a consequence. Patient isolation and altered body image are significant challenges for these nurses. CONCLUSION The nature of the work these nurses do, in particular the fact that they are dealing with cancers, tends to push them into literal and practical silence. But the researchers question whether this is always the best option. They ask if hiding feelings could be bad for nurses and patients alike. In qualitative research it is not appropriate to generalize the results, although lessons can be learnt from the experience of this group.
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Affiliation(s)
- L M Wilkes
- University of Western Sydney/Wentworth Area Health Service Clinical Nursing Research Unit, Penrith, New South Wales, Australia.
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184
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Strahan EJ, White K, Fong GT, Fabrigar LR, Zanna MP, Cameron R. Enhancing the effectiveness of tobacco package warning labels: a social psychological perspective. Tob Control 2002; 11:183-90. [PMID: 12198266 PMCID: PMC1759023 DOI: 10.1136/tc.11.3.183] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.3] [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: 11/04/2022]
Abstract
OBJECTIVE To outline social psychological principles that could influence the psychosocial and behavioural effects of tobacco warning labels, and to inform the development of more effective tobacco warning labels. DATA SOURCES PsycInfo and Medline literature searches and expert guided selection of principles and theories in social psychology and of tobacco warning labels, including articles, books, and reports. CONCLUSIONS Tobacco warning labels represent a potentially effective method of influencing attitudes and behaviours. This review describes social psychological principles that could be used to guide the creation of more effective warning labels. The potential value of incorporating warning labels into a broader public health education campaign is discussed, and directions for future research are suggested.
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Affiliation(s)
- E J Strahan
- Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada
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185
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Abstract
This study assesses the effect of occupational exposure to specific chemicals on the risk of renal cell carcinoma in Canada. Mailed questionnaires were used to obtain data on 1279 (691 male and 588 female) newly diagnosed, histologically confirmed renal cell carcinoma cases and 5370 population controls in eight Canadian provinces, between 1994 and 1997. Data were collected on socio-economic status, smoking habit, alcohol use, diet, residential and occupational histories, and years of exposure to any of 17 chemicals. Odds ratios (ORs) and 95% confidence intervals (CIs) were derived using unconditional logistic regression. The study found an increased risk of renal cell carcinoma in males only, which was associated with occupational exposure to benzene; benzidine; coal tar, soot, pitch, creosote or asphalt; herbicides; mineral, cutting or lubricating oil; mustard gas; pesticides; and vinyl chloride. Compared with no exposure to the specific chemical, the adjusted ORs were 1.8 (95% CI = 1.2-2.6), 2.1 (1.3-3.6), 1.4 (1.1-1.8), 1.6 (1.3-2.0), 1.3 (1.1-1.7), 4.6 (1.7-12.5), 1.8 (1.4-2.3) and 2.0 (1.2-3.3), respectively; an elevated risk was also associated with exposure to cadmium salts and isopropyl oil. The risk of renal cell carcinoma increased with duration of exposure to benzene, benzidine, cadmium, herbicides and vinyl chloride. Very few females were exposed to specific chemicals in this study; further research is needed to clarify the association between occupational exposure to chemicals and renal cell carcinoma in females.
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Affiliation(s)
- J Hu
- Surveillance & Risk Assessment, Centre for Chronic Disease Prevention and Control, Population and Public Health Branch, Health Canada, Ottawa, Ontario, Canada
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186
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Abstract
The dissociation and assembly of quadruplex DNA structures (and a few quadruplex RNAs) have been characterized at several levels of rigor, ranging from gross descriptions of factors that govern each process, to semiquantitative comparisons of the relative abilities of these factors to induce stabilization or destabilization, to quantitative studies of binding energies (thermodynamics), transformational rates (kinetics), and analysis of their transition-state energies and mechanisms. This survey classifies these factors, describes the trends and focuses on their interdependencies. Quadruplex assembly is induced most efficiently by added K(+) and elevating the strand concentration; however, Na(+), NH(4)(+), Sr(2+), and Pb(2+) are also very effective stabilizers. Quadruplex dissociation is typically accomplished by thermal denaturation, "melting"; however, when the quadruplex and monovalent cation concentrations are low enough, or the temperature is sufficiently high, several divalent cations, e.g., Ca(2+), Co(2+), Mn(2+), Zn(2+), Ni(2+) and Mg(2+) can induce dissociation. Stabilization also depends on the type of structure adopted by the strand (or strands) in question. Variants include intramolecular, two- and four-stranded quadruplexes. Other important variables include strand sequence, the size of intervening loops and pH, especially when cytosines are present, base methylation, and the replacement of backbone phosphates with phosphorothioates. Competitive equilibria can also modulate the formation of quadruplex DNAs. For example, reactions leading to Watson-Crick (WC) duplex and hairpin DNAs, triplex DNAs, and even other types of quadruplexes can compete with quadruplex association reactions for strands. Others include nonprotein catalysts, small molecules such as aromatic dyes, metalloporphyrins, and carbohydrates (osmolytes). Other nucleic acid strands have been found to drive quadruplex formation. To help reinforce the implications of each piece of information, each functional conclusion drawn from each cited piece of thermodynamic or kinetic data has been summarized briefly in a standardized table entry.
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Affiliation(s)
- C C Hardin
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC 27695-7622, USA.
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187
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Abstract
This study assessed the influence of active and passive smoking on the risk of stomach cancer by subsite. Mailed questionnaires were used to obtain information on 1171 newly diagnosed histologically confirmed stomach cancer cases and 2207 population controls between 1994 and 1997 in eight Canadian provinces. Data were collected on socio-economic status, lifestyle and passive smoking status. Odds ratios (OR) and 95% confidence intervals (95% CI) were derived by logistic regression. Compared with those who had never smoked, there was strongly increased risk for ex- and current smokers among subjects with cardial stomach cancer. For men with cardial cancer, the adjusted ORs were 1.9 (95% CI 1.2-3.0) and 2.6 (95% CI 1.6-4.3) for ex-smokers and current smokers, respectively, with a similar pattern among women. Among men, the adjusted ORs were lower for subsites of stomach cancer other than cardia. These findings suggest that active and passive smoking may play an important role in the development of cardial stomach cancer.
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Affiliation(s)
- Y Mao
- Surveillance & Risk Assessment, Centre for Chronic Disease Prevention and Control, Population and Public Health Branch, Health Canada, Tunney's Pasture AL0601C1, Ottawa, Ontario K1A 0L2, Canada.
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188
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Rand TG, Mahoney M, White K, Oulton M. Microanatomical changes in alveolar type II cells in juvenile mice intratracheally exposed to Stachybotrys chartarum spores and toxin. Toxicol Sci 2002; 65:239-45. [PMID: 11812928 DOI: 10.1093/toxsci/65.2.239] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [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: 11/13/2022] Open
Abstract
Stachybotrys chartarum is an important environmental fungus. We have shown recently that alveolar type II cells are sensitive to exposure to Stachybotrys chartarum spores and to the trichothecene, isosatratoxin-F, both in vitro and in vivo, in a juvenile mouse model. This sensitivity is manifest as significant changes in the composition and normal metabolic processing of pulmonary surfactant. This study evaluated the effects of a single intratracheal exposure of S. chartarum spores and toxin on ultrastructure and dimensions of alveolar type II cells from juvenile mice. This was to determine whether there are concurrent morphological and dimensional changes in the alveolar type II cell that reflect the metabolic alterations in pulmonary surfactant that we observed in the treated mice. Marked ultrastructural changes were associated with alveolar type II cells in both S. chartarum and isosatratoxin-F treated animals compared to untreated, saline, and Cladosporium cladosporioides spore treated animals. These ultrastructural changes included condensed mitochondria with separated cristae, scattered chromatin and poorly defined nucleolus, cytoplasmic rarefaction, and distended lamellar bodies with irregularly arranged lamellae. Point count stereological analysis revealed a significant increase (p < 0.05) in lamellar body volume density in S. chartarum and isosatratoxin-treated animals after 48 h exposure. Mitochondria volume density was significantly lower in the isosatratoxin-F (48 h exposure) and S. chartarum treated (24 and 48 h exposure) animals compared to those in the other treatment groups. These results reveal that exposure to S. chartarum spores and toxin elicit cellular responses in vivo differently from those associated with exposure to spores of a nontoxigenic mold species. They also indicate that accumulation of newly secreted pulmonary surfactant in the alveolar space of S. chartarum and isosatratoxin-F treated animals might be a consequence of cellular trauma resulting in lamellar body volume density changes leading to increased release of pulmonary surfactant into the alveolar space.
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Affiliation(s)
- T G Rand
- Department of Biology, Saint Mary's University, 923 Robie Street, Halifax, Nova Scotia, Canada B3H 3C3.
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189
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Mah N, Stoehr H, Schulz HL, White K, Weber BH. Identification of a novel retina-specific gene located in a subtelomeric region with polymorphic distribution among multiple human chromosomes. Biochim Biophys Acta 2001; 1522:167-74. [PMID: 11779631 DOI: 10.1016/s0167-4781(01)00328-1] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The human retina is comprised of a large number of cell types with highly specialized functions that depend on the action of countless genes, many of which are exclusively expressed in the retina. We have isolated a novel retinal gene, termed F379. The transcript was initially identified as a cluster of ESTs derived predominantly from retinal cDNA libraries and its retinal transcription confirmed by Northern blot and RT-PCR. Screening of retinal cDNA libraries yielded four clones that were assembled into a 1188 bp consensus sequence. The putative open reading frame includes an unusual configuration of Alu and MIR repeats and encodes a putative 85 aa peptide with no significant homology to any known protein sequence outside of the Alu and MIR elements. Comparison with genomic sequence determined that F379 consists of three exons and maps to multiple locations throughout the genome, a finding confirmed by PCR screening of a somatic cell hybrid mapping panel. F379 appears to be contained within a region of subtelomeric DNA that is duplicated in a polymorphic distribution to multiple chromosomes. Comparison of interchromosomal sequence variation with the sequences of expressed transcripts suggests that the gene is transcribed in the human retina from at least four different chromosomes.
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Affiliation(s)
- N Mah
- Institut fuer Humangenetik, Biozentrum, Universitaet Wuerzburg, D-97074, Wuerzburg, Germany
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190
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Wolf DE, Satkoski JA, White K, Rieseberg LH. Sex determination in the androdioecious plant Datisca glomerata and its dioecious sister species D. cannabina. Genetics 2001; 159:1243-57. [PMID: 11729166 PMCID: PMC1461886 DOI: 10.1093/genetics/159.3.1243] [Citation(s) in RCA: 29] [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: 11/14/2022] Open
Abstract
Datisca glomerata is an androdioecious plant species containing male and hermaphroditic individuals. Molecular markers and crossing data suggest that, in both D. glomerata and its dioecious sister species D. cannabina, sex is determined by a single nuclear locus, at which maleness is dominant. Supporting this conclusion, an amplified fragment length polymorphism (AFLP) is heterozygous in males and homozygous recessive in hermaphrodites in three populations of the androdioecious species. Additionally, hermaphrodite x male crosses produced 1:1 sex ratios, while hermaphrodite x hermaphrodite crosses produced almost entirely hermaphroditic offspring. No perfectly sex-linked marker was found in the dioecious species, but all markers associated with sex mapped to a single linkage group and were heterozygous in the male parent. There was no sex-ratio heterogeneity among crosses within D. cannabina collections, but males from one collection produced highly biased sex ratios (94% females), suggesting that there may be sex-linked meiotic drive or a cytoplasmic sex-ratio factor. Interspecific crosses produced only male and female offspring, but no hermaphrodites, suggesting that hermaphroditism is recessive to femaleness. This comparative approach suggests that the hermaphrodite form arose in a dioecious population from a recessive mutation that allowed females to produce pollen.
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Affiliation(s)
- D E Wolf
- Department of Biology, Indiana University, Bloomington, Indiana 47405-3700, USA.
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191
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Lisbin MJ, Qiu J, White K. The neuron-specific RNA-binding protein ELAV regulates neuroglian alternative splicing in neurons and binds directly to its pre-mRNA. Genes Dev 2001; 15:2546-61. [PMID: 11581160 PMCID: PMC312793 DOI: 10.1101/gad.903101] [Citation(s) in RCA: 83] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Drosophila melanogaster neural-specific protein, ELAV, has been shown to regulate the neural-specific splicing of three genes: neuroglian (nrg), erect wing, and armadillo. Alternative splicing of the nrg transcript involves alternative inclusion of a 3'-terminal exon. Here, using a minigene reporter, we show that the nrg alternatively spliced intron (nASI) has all the determinants required to recreate proper neural-specific RNA processing seen with the endogenous nrg transcript, including regulation by ELAV. An in vitro UV cross-linking assay revealed that ELAV from nuclear extracts cross-links to four distinct sites along the 3200 nucleotide long nASI; one EXS is positioned at the polypyrimidine tract of the default 3' splice site. ELAV cross-linking sites (EXSs) have in common long tracts of (U)-rich sequence rather than a precise consensus; moreover, each tract has at least two 8/10U elements; their importance is validated by mutant transgene reporter analysis. Further, we propose criteria for ELAV target sequence recognition based on the four EXSs, sites within the nASI that are (U) rich but do not cross-link with ELAV, and predicted EXSs from a phylogenetic comparison with Drosophila virilis nASI. These results suggest that ELAV regulates nrg alternative splicing by direct interaction with the nASI.
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Affiliation(s)
- M J Lisbin
- Department of Biology and Center for Complex Systems, MS 008, Brandeis University, Waltham, MA 02454, USA
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192
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Sauer CG, White K, Stöhr H, Grimm T, Hutchinson A, Bernstein PS, Lewis RA, Simonelli F, Pauleikhoff D, Allikmets R, Weber BH. Evaluation of the G protein coupled receptor-75 (GPR75) in age related macular degeneration. Br J Ophthalmol 2001; 85:969-75. [PMID: 11466257 PMCID: PMC1724093 DOI: 10.1136/bjo.85.8.969] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 11/03/2022]
Abstract
BACKGROUND A long term project was initiated to identify and to characterise genes that are expressed exclusively or preferentially in the retina as candidates for a genetic susceptibility to age related macular degeneration (AMD). A transcript represented by a cluster of five human expressed sequence tags (ESTs) derived exclusively from retinal cDNA libraries was identified. METHODS Northern blot and RT-PCR analyses confirmed preferential retinal expression of the gene, which encodes a G protein coupled receptor, GPR75. Following isolation of the full length cDNA and determination of the genomic organisation, the coding sequence of GPR75 was screened for mutations in 535 AMD patients and 252 controls from Germany, the United States, and Italy. Employed methods included single stranded conformational polymorphism (SSCP) analysis, denaturing high performance liquid chromatography (DHPLC), and direct sequencing. RESULTS Nine different sequence variations were identified in patients and control individuals. Three of these (-30A>C, 150G>A, and 346G>A) likely represent polymorphic variants. Each of six alterations (-4G>A, N78K, P99L, S108T, T135P, and Q234X) were found once in single AMD patients and were considered variants that could affect the protein function and potentially cause retinal pathology. CONCLUSION The presence of six potential pathogenic variants in a cohort of 535 AMD patients alone does not provide statistically significant evidence for the association of sequence variation in GPR75 with genetic predisposition to AMD. However, a possible connection between the variants and age related retinal pathology cannot be discarded. Functional studies are needed to clarify the role of GPR75 in retinal physiology.
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Affiliation(s)
- C G Sauer
- Institute of Human Genetics, University of Würzburg, Germany
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193
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Hazeldine ST, Polin L, Kushner J, Paluch J, White K, Edelstein M, Palomino E, Corbett TH, Horwitz JP. Design, synthesis, and biological evaluation of analogues of the antitumor agent, 2-(4-[(7-chloro-2-quinoxalinyl)oxy]phenoxy)propionic acid (XK469). J Med Chem 2001; 44:1758-76. [PMID: 11356111 DOI: 10.1021/jm0005149] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [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: 11/29/2022]
Abstract
2-(4-[(7-Chloro-2-quinoxalinyl)oxy]phenoxy)propionic acid (XK469) is among the most highly and broadly active antitumor agents to have been evaluated in our laboratories and is currently scheduled to enter clinical trials in 2001. The mechanism or mechanisms of action of XK469 remain to be elaborated. Accordingly, an effort was initiated to establish a pharmacophore hypothesis to delineate the requirements of the active site, via a comprehensive program of synthesis of analogues of XK469 and evaluation of the effects of structural modification(s) on solid tumor activity. The strategy formulated chose to dissect the two-dimensional parent structure into three regions-I, ring A of quinoxaline; II, the hydroquinone connector linkage; and III, the lactic acid moiety-to determine the resultant in vitro and in vivo effects of chemical alterations in each region. Neither the A-ring unsubstituted nor the B-ring 3-chloro-regioisomer of XK469 showed antitumor activity. The modulating antitumor effect(s) of substituents of differing electronegativities, located at the several sites comprising the A-ring of region I, were next ascertained. Thus, a halogen substituent, located at the 7-position of a 2-(4-[(2-quinoxalinyl)oxy]phenoxy)propionic acid, generated the most highly and broadly active antitumor agents. A methyl, methoxy, or an azido substituent at this site generated a much less active structure, whereas 5-, 6-, 8-chloro-, 6-, 7-nitro, and 7-amino derivatives all proved to be essentially inactive. When the connector linkage (region II) of 1 was changed from that of a hydroquinone to either a resorcinol or a catechol derivative, all antitumor activity was lost. Of the carboxylic acid derivatives of XK469 (region III), i.e., CONH2, CONHCH3, CON(CH3)2, CONHOH, CONHNH2, CN, or CN4H (tetrazole), only the monomethyl- and N,N-dimethylamides proved to be active.
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Affiliation(s)
- S T Hazeldine
- Department of Internal Medicine, Division of Hematology and Oncology, Wayne State University School of Medicine, Detroit, Michigan 48201, USA
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194
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Wilkes L, Withnall J, Harris R, White K, Beale B, Hobson J, Durham M, Kristjanson L. Stories about breast cancer in Australian women's magazines: information sources for risk, early detection and treatment. Eur J Oncol Nurs 2001; 5:80-8; discussion 89-90. [PMID: 12849034 DOI: 10.1054/ejon.2001.0126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Sixty articles in five Australian women's magazines were analyzed for journalistic qualities, metaphors, narrative features and accuracy of clinical facts related to risk, early detection and treatment of breast cancer. The stories were features, news features or soft news stories. The stories reflected the 'good news' editorial style of women's magazines. A dominant theme in the stories was that early detection of breast cancer is crucial and equals survival. While there were few inaccuracies in the stories, there was little detail of treatment modalities, an emphasis on lifestyle as a risk factor and a prevailing message that a genetic history of breast cancer means you will get it. A major implication of the findings is that nurses, who provide information to women, must be aware of the goals of journalists and the educational power of narrative logic of stories in women's magazines.
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Affiliation(s)
- L Wilkes
- Clinical Nursing Research Unit, University of Western Sydney, Nepean, NSW, Australia.
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Scholl HP, Kremers J, Vonthein R, White K, Weber BH. L- and M-cone-driven electroretinograms in Stargardt's macular dystrophy-fundus flavimaculatus. Invest Ophthalmol Vis Sci 2001; 42:1380-9. [PMID: 11328755] [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: 02/19/2023] Open
Abstract
PURPOSE To study the dynamics of the long (L)- and middle (M)-wavelength-sensitive cone-driven pathways and their interactions in patients with Stargardt's macular dystrophy-fundus flavimaculatus (SMD-FF) and to correlate them with other clinical parameters and individual genotypes. METHODS Forty-seven patients with SMD-FF participated in the study. In addition to standard 30-Hz flicker electroretinograms (30-Hz fERG), ERG responses were measured to stimuli that modulated exclusively the L or the M cones (L/M cones) or the two simultaneously. Blood samples were screened for mutations in the 50 exons of the ABCA4 gene. RESULTS Patients with SMD-FF did not show a decrease in the mean L/M-cone-driven ERG sensitivity, but there was a significant increase in the interindividual variability. The mean L-/M-cone weighting ratio was normal. However, the L-cone-driven ERG was significantly phase delayed, whereas the M-cone-driven ERG was significantly phase advanced. These phase changes were significantly correlated with disease duration. The amplitude and implicit time of the standard 30-Hz fERG both correlated significantly with the L/M-cone-driven ERG sensitivity and with the phase difference between the L/M-cone-driven ERGs, indicating the complex origin of the standard 30-Hz fERG. Probable disease-associated mutations in the ABCA4 gene were found in 40 of 45 patients, suggesting that they form a genetically fairly uniform SMD-FF study group. There was no correlation between the genotype and the L/M-cone-driven ERGS: CONCLUSIONS The changes in L/M-cone-driven ERG sensitivity and phase possibly represent two independent disease processes. The phase changes are similar to those found in patients with retinitis pigmentosa and possibly are a general feature of retinal dystrophies.
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Affiliation(s)
- H P Scholl
- Department of Experimental Ophthalmology, University Eye Hospital, Röntgenweg 11, 72076 Tübingen, Germany
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Abstract
This paper reports on the findings from the first part of a three-phase project that aimed to identify nursing strategies used in the management of malignant wounds. The difficulties relating to the management of these wounds and the significant physical and psychological impact on patients are described. A quantitative postal survey aiming to identify the types of dressing used in the care of malignant wounds was sent to specialist nurses working in oncology and palliative care in New South Wales, Australia. Additional qualitative data showed that the major issues were coping with odour and meeting the financial costs of the dressing products. The long list of products compiled for this research demonstrates the complexities nurses face when selecting dressings for the management of malignant wounds. Furthermore, there are no clear recommendations to guide nursing practice. This study provides a framework for subsequent phases of the project and will hopefully lead to the development of guidelines for best practice in malignant wound management.
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Affiliation(s)
- L Wilkes
- Clinical Nursing Research Unit, Wentworth Area Health Service/University of Western Sydney Nepean, Penrith, New South Wales, Australia
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198
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Abstract
The early onset of multiple drusen in the posterior pole of the retina is characteristic of a group of macular dystrophies often referred to as dominant or radial drusen. At least two forms, Doyne honeycomb retinal dystrophy (DHRD) and Malattia Leventinese (MLVT), are associated with a single missense mutation (R345W) in the gene encoding the EGF-containing fibulin-like extracellular matrix protein-1 (EFEMP1) and are now thought to represent a single entity. Here, we present a further evaluation of the role of EFEMP1 in the pathogenesis of sporadic forms of early onset drusen. We analyzed all coding exons of the EFEMP1 gene by SSCP analysis in 14 unrelated individuals with early onset of multiple drusen and no apparent family history of the disease. In this patient group, we did not detect the R345W mutation or any other disease-associated mutation. Three different polymorphisms and two intragenic polymorphic repeats were present in similar frequencies in the patients and control individuals. We conclude that EFEMP1 is unlikely to be involved in the disease in this patient group. This suggests that mutations in a different as yet unknown gene or genes may lead to the early onset drusen phenotype.
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Affiliation(s)
- C G Sauer
- Institut für Humangenetik, Universität Würzburg, Germany
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Hofferbert S, Worringen U, Backe J, Rückert EM, White K, Faller H, Grimm T, Caffier H, Chang-Claude J, Weber BH. Simultaneous interdisciplinary counseling in German breast/ovarian cancer families: first experiences with patient perceptions, surveillance behavior and acceptance of genetic testing. Genet Couns 2001; 11:127-46. [PMID: 10893664] [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: 02/17/2023]
Abstract
As part of a multicenter study supported by the German Mildred Scheel foundation we have established an interdisciplinary counseling setting for members of breast and/or ovarian cancer families. We offer simultaneous counseling by a team consisting of a geneticist, a gynecologist and a psycho-oncologist. Here we describe our counseling protocol and our first short-term experience with this interdisciplinary approach. Preliminary data on patient perceptions and behaviors in the context of DNA testing are reported. Overall, our counseling approach was perceived as beneficial both by the counselors and the consultants. A marked overestimation of the risk to develop breast and/or ovarian cancer was noted in the group of unaffected individuals from medium to low risk breast cancer families in contrast to an appropriate risk perception in members from high risk families. All participants shared many of the same expectations about genetic testing and counseling and appeared to base their decision-making about testing on the risk classification given by the genetic counselor. The reported participation in gynecological cancer prevention programs was high in all families at risk, but was less sufficient in unaffected as compared to affected persons. Although current data on BRCA1/BRCA2 mutation analyses render testing in medium to low risk individuals questionable, our findings emphasize the importance of genetic counseling and education in all risk categories of breast and/or ovarian cancer families.
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Oldenburg J, Ivaskevicius V, Rost S, Fregin A, White K, Holinski-Feder E, Müller CR, Weber BH. Evaluation of DHPLC in the analysis of hemophilia A. J Biochem Biophys Methods 2001; 47:39-51. [PMID: 11179760 DOI: 10.1016/s0165-022x(00)00150-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The manifestation of hemophilia A, a common hereditary bleeding disorder in humans, is caused by abnormalities in the factor VIII (FVIII) gene. A wide range of different mutations has been identified and provides the genetic basis for the extensive variability observed in the clinical phenotype. The knowledge of a specific mutation is of great interest as this may facilitate genetic counseling and prediction of the risk of anti-FVIII antibody development, the most serious complication in hemophilia A treatment to date. Due to its considerable size (7.2 kb of the coding sequence, represented by 26 exons), mutation detection in this gene represents a challenge that is only partially met by conventional screening methods such as denaturing gradient gel electrophoresis (DGGE) or single stranded conformational polymorphism (SSCP). These techniques are time consuming, require specific expertise and are limited to detection rates of 70-85%. In contrast, the recently introduced denaturing high performance liquid chromatography (dHPLC) offers a promising new method for a fast and sensitive analysis of PCR-amplified DNA fragments. To test the applicability of dHPLC in the molecular diagnosis of hemophilia A, we first assessed a cohort of 156 patients with previously identified mutations in the FVIII gene. Applying empirically determined exon-specific melting profiles, a total of 150 mutations (96.2%) were readily detected. Five mutations (3.2%) could be identified after temperatures were optimized for the specific nucleotide change. One mutation (0.6%) failed to produce a detectable heteroduplex signal. In a second series, we analyzed 27 hemophiliacs in whom the mutation was not identified after extensive DGGE and chemical mismatch cleavage (CMC) analysis. In 19 of these patients (70.4%), dHPLC facilitated the detection of the disease-associated nucleotide alterations. From these findings we conclude that the dHPLC technology is a highly sensitive method well suited to the molecular analysis of hemophilia A.
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Affiliation(s)
- J Oldenburg
- Department of Human Genetics, University of Würzburg, Biozentrum, Am Hubland, D-97074, Würzburg, Germany.
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