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Abel M. On the joint continuity of module multiplication. PEAS 2023. [DOI: 10.3176/proc.2023.1.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Abel M, Nazon C, Spiegel-Bouhadid A, Salmon A, Fornecker L, Nicolae A, Paillard C. PRE-TRANSPLANT TREATMENT OF HEPATISPLENIC T-CELL LYMPHOMA (GAMMA-DELATA): A PEDIATRIC CASE REPORT. Leuk Res 2022. [DOI: 10.1016/s0145-2126(22)00277-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abel M. Limits in the category Seg of Segal topological algebras. PEAS 2022. [DOI: 10.3176/proc.2022.2.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. Colimits in the category Seg of Segal topological algebras. PEAS 2022. [DOI: 10.3176/proc.2022.3.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. Coequalizers and pullbacks in the category Seg of Segal topological algebras. Proceedings of the Estonian Academy of Sciences 2021. [DOI: 10.3176/proc.2021.2.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. Coproducts in the category Seg of Segal topological algebras. Proceedings of the Estonian Academy of Sciences 2021. [DOI: 10.3176/proc.2021.3.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M, Marmor R. About a function that allows calculation of all symmetric homogeneous bivariate means. Proceedings of the Estonian Academy of Sciences 2020. [DOI: 10.3176/proc.2020.4.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. About the cocompleteness of the category S(B) of Segal topological algebras. Proceedings of the Estonian Academy of Sciences 2020. [DOI: 10.3176/proc.2020.1.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. Initial objects, terminal objects, zero objects, and equalizers in the category Seg of Segal topological algebras. Proceedings of the Estonian Academy of Sciences 2020. [DOI: 10.3176/proc.2020.4.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. About the limits of inverse systems in the category S(B) of Segal topological algebras. Proceedings of the Estonian Academy of Sciences 2020. [DOI: 10.3176/proc.2020.1.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. About pushouts in the category φ(B) of Segal topological algebras. Proc Estonian Acad Sci 2019. [DOI: 10.3176/proc.2019.3.08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nordentoft M, Jeppesen P, Abel M, Kassow P, Petersen L, Thorup A, Krarup G, Hemmingsen R, Jørgensen P. OPUS study: Suicidal behaviour, suicidal ideation and hopelessness among patients with first-episode psychosis. Br J Psychiatry 2018; 43:s98-106. [PMID: 12271808 DOI: 10.1192/bjp.181.43.s98] [Citation(s) in RCA: 217] [Impact Index Per Article: 36.2] [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: 11/23/2022]
Abstract
BackgroundPatients with first-episode psychosis comprise a high-risk group in terms of suicide.AimsTo identify predictive factors for suicidal behaviour and to examine the effect of integrated treatment on suicidal behaviour and hopelessness.MethodA total of 341 patients with a first-episode schizophrenia-spectrum disorder were randomised to integrated treatment or treatment as usual.ResultsDuring the 1-year follow-up period, 11% attempted suicide. This was associated with female gender, hopelessness, hallucinations and suicide attempt reported at baseline, with the two latter variables being the only significant ones in the final multivariate model. The integrated treatment reduced hopelessness.ConclusionsHallucinations and suicide attempt before inclusion in the study were the most significant predictors of suicide attempt in the follow-up period.
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Affiliation(s)
- M Nordentoft
- Department of Psychiatry E, Bispebjerg Hospital, Bispebjerg Bakke 23, DK-2400 Copenhagen NV.
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Abel M, de Jesús Zárate-Rodríguez Y. Topological spectrum of elements in topological algebras. Proc Estonian Acad Sci 2018. [DOI: 10.3176/proc.2018.3.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abel M. About the density property in the space of continuous maps vanishing at infinity. Proc Estonian Acad Sci 2018. [DOI: 10.3176/proc.2018.3.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Andriessen A, Apelqvist J, Mosti G, Partsch H, Gonska C, Abel M. Compression therapy for venous leg ulcers: risk factors for adverse events and complications, contraindications - a review of present guidelines. J Eur Acad Dermatol Venereol 2017; 31:1562-1568. [DOI: 10.1111/jdv.14390] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 05/18/2017] [Indexed: 11/29/2022]
Affiliation(s)
- A. Andriessen
- Radboud UMC; Nijmegen & Andriessen Consultants; Malden The Netherlands
- International Compression Club (ICC); Berndorf Austria
| | - J. Apelqvist
- Department of Endocrinology; University Hospital of Malmö; Malmö Sweden
| | - G. Mosti
- Department of Angiology; Clinica MD Barbantini; Lucca Italy
- International Compression Club (ICC); Berndorf Austria
| | - H. Partsch
- Medical University Vienna; Vienna Austria
- International Compression Club (ICC); Berndorf Austria
| | - C. Gonska
- Medical & Regulatory Affairs; Lohmann & Rauscher GmbH & Co KG; Rengsdorf Germany
| | - M. Abel
- Medical & Regulatory Affairs; Lohmann & Rauscher GmbH & Co KG; Rengsdorf Germany
- Patient Outcome Group (POG); European Wound Management Association (EWMA); Frederiksberg Denmark
- International Compression Club (ICC); Berndorf Austria
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Asaduzzaman M, Nadeem A, Arizmendi N, Davidson C, Nichols HL, Abel M, Ionescu LI, Puttagunta L, Thebaud B, Gordon J, DeFea K, Hollenberg MD, Vliagoftis H. Functional inhibition of PAR2 alleviates allergen-induced airway hyperresponsiveness and inflammation. Clin Exp Allergy 2016; 45:1844-55. [PMID: 26312432 DOI: 10.1111/cea.12628] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 05/28/2015] [Accepted: 06/07/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND Proteinase-activated receptor 2 (PAR2 ) is a G protein-coupled receptor activated by trypsin-like serine proteinases. PAR2 activation has been associated with inflammation including allergic airway inflammation. We have also shown that PAR2 activation in the airways leads to allergic sensitization. The exact contribution of PAR2 in the development of eosinophilic inflammation and airway hyperresponsiveness (AHR) in sensitized individuals is not clear. OBJECTIVE To investigate whether functional inhibition of PAR2 during allergen challenge of allergic mice would inhibit allergen-induced AHR and inflammation in mouse models of asthma. METHODS Mice were sensitized and challenged with ovalbumin (OVA) or cockroach extract (CE). To investigate the role of PAR2 in the development of AHR and airway inflammation, we administered blocking anti-PAR2 antibodies, or a cell permeable peptide inhibitor of PAR2 signalling, pepducin, i.n. before allergen challenges and then assessed AHR and airway inflammation. RESULTS Administration of anti-PAR2 antibodies significantly inhibited OVA- and CE-induced AHR and airway inflammation. In particular, two anti-PAR2 antibodies, the monoclonal SAM-11 and polyclonal B5, inhibited AHR, airway eosinophilia, the increase of cytokines in the lung tissue and antigen-specific T cell proliferation, but had no effect on antigen-specific IgG and IgE levels. Pepducin was also effective in inhibiting AHR and airway inflammation in an OVA model of allergic airway inflammation. CONCLUSIONS AND CLINICAL RELEVANCE Functional blockade of PAR2 in the airways during allergen challenge improves allergen-induced AHR and inflammation in mice. Therefore, topical PAR2 blockade in the airways, through anti-PAR2 antibodies or molecules that interrupt PAR2 signalling, has the potential to be used as a therapeutic option in allergic asthma.
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Affiliation(s)
- M Asaduzzaman
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - A Nadeem
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - N Arizmendi
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - C Davidson
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - H L Nichols
- Division of Biomedical Sciences and Cell, Molecular and Developmental Biology, University of California, Riverside, CA, USA
| | - M Abel
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - L I Ionescu
- Department of Physiology, Women and Children Health Research Institute, University of Alberta, Edmonton, AB, Canada
| | - L Puttagunta
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - B Thebaud
- Department of Physiology, Women and Children Health Research Institute, University of Alberta, Edmonton, AB, Canada
| | - J Gordon
- Immunology Research Group, University of Saskatchewan, Saskatoon, SK, Canada
| | - K DeFea
- Division of Biomedical Sciences and Cell, Molecular and Developmental Biology, University of California, Riverside, CA, USA
| | - M D Hollenberg
- Department of Pharmacology and Therapeutics, University of Calgary, Calgary, AB, Canada
| | - H Vliagoftis
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, AB, Canada
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Abel M, Ahmed H, Leen E, Park E, Chen M, Wasan H, Price P, Monzon L, Gedroyc W, Abel P. Ultrasound-guided trans-rectal high-intensity focused ultrasound (HIFU) for advanced cervical cancer ablation is feasible: a case report. J Ther Ultrasound 2015; 3:21. [PMID: 26688729 PMCID: PMC4684617 DOI: 10.1186/s40349-015-0043-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 12/13/2015] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION High-intensity focused ultrasound (HIFU) is an ablative treatment undergoing assessment for the treatment of benign and malignant disease. We describe the first reported intracavitary HIFU ablation for recurrent, unresectable and symptomatic cervical cancer. CASE DESCRIPTION A 38 year old woman receiving palliative chemotherapy for metastatic cervical adenocarcinoma was offered ablative treatment from an intracavitary trans-rectal HIFU device (Sonablate® 500). Pre-treatment symptoms included vaginal bleeding and discharge that were sufficient to impede her quality of life. No peri-procedural adverse events occurred. Symptoms resolved completely immediately post-procedure, reappeared at 7 days, increasing to pre-procedural levels by day 30. DISCUSSION AND EVALUATION This first time experience of intracavitary cervical HIFU suggests that it is feasible for palliation of advanced cervical cancer, with no early evidence of unexpected toxicity. Ethical approval had also been granted for the use of per-vaginal access if appropriate. This route, alone or in combination with the rectal route, may provide increased accessibility in future patients with a redesigned device more suited to trans-vaginal ablations. CONCLUSION Intracavitary HIFU is a potentially safe procedure for the treatment of cervical cancer and able to provide symptomatic improvement in the palliative setting.
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Affiliation(s)
- M Abel
- Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
| | - H Ahmed
- Department of Urology, University College Hospital, 235 Euston Road, London, NW1 2BU UK
| | - E Leen
- Department of Radiology, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
| | - E Park
- Department of Oncology, Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
| | - M Chen
- Department of Oncology, Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
| | - H Wasan
- Department of Oncology, Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
| | - P Price
- Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
| | - L Monzon
- Department of Radiology, Guy's and St Thomas' Hospital NHS Trust, St Thomas' Hospital, Westminster Bridge Road, London, SE1 7EH UK
| | - W Gedroyc
- Department of Radiology, Imperial College London, St Mary's Hospital, Praed Street, London, W2 1NY UK
| | - P Abel
- Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0HS UK
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Krajewski S, Nathan T, Walker T, Neumann B, Hoffmann S, Abel M, Koggel A, Schlensak C, Wendel HP. Identification of Abdominal Swabs Exhibiting Procoagulant Potency Using a Novel Simple Clotting Test. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
On-surface reaction of tetracyanobenzene molecules with Mn atoms is presented.
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Affiliation(s)
- M. Koudia
- Aix Marseille Université
- CNRS
- IM2NP
- UMR7334
- 13397 Marseille, France
| | - M. Abel
- Aix Marseille Université
- CNRS
- IM2NP
- UMR7334
- 13397 Marseille, France
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Wiegand C, Abel M, Muldoon J, Ruth P, Hipler UC. SAP-containing dressings exhibit sustained antimicrobial effects over 7 days in vitro. J Wound Care 2013; 22:120, 122-4, 126-7. [PMID: 23665730 DOI: 10.12968/jowc.2013.22.3.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To investigate the antimicrobial activity of SAP-containing wound dressings in vitro over a prolonged period of time (7 days) and to assess their ability to sustain the antimicrobial effect. METHOD SAP dressings were tested according to the JIS L 1902:2002 against the pathogens Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, Escherichia coli and Candida albicans.Additionally, effect on S. aureus and P. aeruginosa growth was investigated after a prolonged incubation period of 7 days. Furthermore, both SAP dressings were repeatedly inoculated with P. aeruginosa suspension and, after 7 days, microbial growth under the dressings was evaluated. RESULTS Both SAP-containing wound dressings tested exhibited a significant to strong antimicrobial activity against Staphylococcus aureus, MRSA, Pseudomonas aeruginosa, Klebsiella pneumoniae, Escherichia coli, and Candida albicans in vitro. Moreover, it could be shown that they were able to sustain antibacterial efficacy over a prolonged period of time. Using a direct incubation method with repeated re-inoculation of the dressing samples, it could be shown that growth of P. aeruginosa was reduced after 4 days of treatment and completely inhibited after 7 days. No significant differences were observed between the two SAP-dressings tested. CONCLUSION These in vitro experiments impressively demonstrated the antimicrobial mechanism of SAP-containing wound dressings: rapid up-take of fluid, binding of microorganisms to the SAP-core, and retention of the bacteria inside the dressing. Moreover, it could be shown that they are able to exhibit their antimicrobial activity over a prolonged period of time unless the amount of fluid present exceeds their fluid-handling capacity.
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Affiliation(s)
- C Wiegand
- Department of Dermatology, University Medical Center, Jena, Germany
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Winkler M, Kofod G, Krastev R, Stöckle S, Abel M. Exponentially fast thinning of nanoscale films by turbulent mixing. Phys Rev Lett 2013; 110:094501. [PMID: 23496714 DOI: 10.1103/physrevlett.110.094501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Indexed: 06/01/2023]
Abstract
Films are nanoscopic elements of foams, emulsions, and suspensions that form a paradigm for nanochannel transport that eventually tests the limits of hydrodynamic descriptions. Here, we study the collapse of a freestanding film to its equilibrium. The generation of nanoscale films usually is a slow linear process; using thermal forcing we find unprecedented dynamics with exponentially fast thinning. The complex interplay of thermal convection, interface, and gravitational forces yields optimal turbulent mixing and transport. Domains of collapsed film are generated, elongated, and convected in a beautiful display of chaotic mixing. With a time scale analysis, we identify mixing as the dominant dynamical process responsible for exponential thinning.
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Affiliation(s)
- M Winkler
- University of Potsdam, 14476 Potsdam, Germany
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Malietzis G, Monzon L, Hand J, Wasan H, Leen E, Abel M, Muhammad A, Price P, Abel P. High-intensity focused ultrasound: advances in technology and experimental trials support enhanced utility of focused ultrasound surgery in oncology. Br J Radiol 2013; 86:20130044. [PMID: 23403455 DOI: 10.1259/bjr.20130044] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
High-intensity focused ultrasound (HIFU) is a rapidly maturing technology with diverse clinical applications. In the field of oncology, the use of HIFU to non-invasively cause tissue necrosis in a defined target, a technique known as focused ultrasound surgery (FUS), has considerable potential for tumour ablation. In this article, we outline the development and underlying principles of HIFU, overview the limitations and commercially available equipment for FUS, then summarise some of the recent technological advances and experimental clinical trials that we predict will have a positive impact on extending the role of FUS in cancer therapy.
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Affiliation(s)
- G Malietzis
- Department of Surgery and Cancer, Faculty of Medicine, Imperial College, London, UK
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Piatkowski A, Ulrich D, Seidel D, Abel M, Pallua N, Andriessen A. Randomised, controlled pilot to compare collagen and foam in stagnating pressure ulcers. J Wound Care 2012; 21:505-11. [DOI: 10.12968/jowc.2012.21.10.505] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- A. Piatkowski
- Department of Plastic Surgery and Hand Surgery, Burn Unit, RWTH University Hospital Aachen, Germany
| | - D. Ulrich
- Department of Plastic Surgery, UMC St Radboud, Nijmegen, the Netherlands
| | - D. Seidel
- Department of Plastic Surgery and Hand Surgery, Burn Unit, RWTH University Hospital Aachen, Germany
| | - M. Abel
- Lohmann & Rauscher GmbH & Co KG, Rengsdorf, Germany
| | - N. Pallua
- Department of Plastic Surgery and Hand Surgery, Burn Unit, RWTH University Hospital Aachen, Germany
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Wiegand C, Abel M, Ruth P, Hipler UC. Analysis of the Adaptation Capacity of Staphylococcus aureus to Commonly Used Antiseptics by Microplate Laser Nephelometry. Skin Pharmacol Physiol 2012; 25:288-97. [DOI: 10.1159/000341222] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 06/19/2012] [Indexed: 11/19/2022]
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Wong I, Man M, Chan O, Siu F, Abel M, Andriessen A. Comparison of the interface pressure and stiffness of four types of compression systems. J Wound Care 2012; 21:161, 164, 166-7. [DOI: 10.12968/jowc.2012.21.4.161] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- I.K.Y. Wong
- School of Nursing, Hong Kong Sanatorium and Hospital, Hong Kong, HKSAR
| | - M.B.L. Man
- Hong Kong Sanatorium and Hospital, Hong Kong, HKSAR
| | - O.S.H. Chan
- Hong Kong Sanatorium and Hospital, Hong Kong, HKSAR
| | - F.C. Siu
- Hong Kong Sanatorium and Hospital, Hong Kong, HKSAR
| | - M. Abel
- Lohmann & Rauscher, Rengsdorf, Germany
| | - A. Andriessen
- Andriessen Consultants, Malden and UMC St Radboud, Nijmegen, the Netherlands
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Eberlein T, Haemmerle G, Signer M, Gruber Moesenbacher U, Traber J, Mittlboeck M, Abel M, Strohal R. Comparison of PHMB-containing dressing and silver dressings in patients with critically colonised or locally infected wounds. J Wound Care 2012; 21:12, 14-6, 18-20. [PMID: 22240928 DOI: 10.12968/jowc.2012.21.1.12] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE This study compares treatment with a polihexanide-containing biocellulose wound dressing (BWD+PHMB) versus the best local standard of silver dressings (Ag) in painful, critically colonised (wounds-at-risk) or locally-infected wounds. METHOD Patients with wounds of various aetiologies, a baseline VAS pain score >4 and a semi-quantitative bacterial load of ++ or higher were randomly allocated to receive treatment with either BWD+PHMB or Ag. Patients with systemic infections and/or using systemic antibiotics were excluded. The primary endpoint, patient-reported pain (VAS total pain, including the sub-scores pain at night, during the day, before, and 15min after dressing changes), was compared between treatment groups and scored on days 0, 1, 3, 7, 14, 21 and 28. Secondary outcomes of bacterial load, wound bed and periwound skin condition, quality of life and dressing handling were assessed at the same visits. RESULTS Thirty-eight patients (BWD+PHMB, n=21 [24 wounds]; Ag, n=17 [18 wounds]) were included in the analyses. Baseline variables showed no significant differences. Wound pain was reduced significantly in both groups, with a better pain reduction noted for BWD+ PHMB (p<0.001) before dressing changes. Compared with Ag, in the BWD+PHMB group critical colonisation and local wound infection had been reduced significantly faster and better (p<0.001) over the 28-day study period. Improved quality of life, good tolerability and no adverse events were demonstrated for both groups. CONCLUSION Both BWD+PHMB and AG were effective in reducing pain and bacterial burden. However, that BWD+PHMB was significantly faster and better in removing the critical bacterial load, makes this dressing an attractive therapeutic option to treat critically colonised and locally-infected wounds.
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Affiliation(s)
- T Eberlein
- Department of Surgery, Salmaniya Medical Centre, Arabian Gulf University, Manama, Bahrain
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Ranzinger J, Rustom A, Abel M, Leyh J, Kihm L, Witkowski M, Scheurich P, Zeier M, Schwenger V. Nanotube action between human mesothelial cells reveals novel aspects of inflammatory responses. PLoS One 2011; 6:e29537. [PMID: 22216308 PMCID: PMC3246504 DOI: 10.1371/journal.pone.0029537] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 11/30/2011] [Indexed: 12/12/2022] Open
Abstract
A well-known role of human peritoneal mesothelial cells (HPMCs), the resident cells of the peritoneal cavity, is the generation of an immune response during peritonitis by activation of T-cells via antigen presentation. Recent findings have shown that intercellular nanotubes (NTs) mediate functional connectivity between various cell types including immune cells - such as T-cells, natural killer (NK) cells or macrophages - by facilitating a spectrum of long range cell-cell interactions. Although of medical interest, the relevance of NT-related findings for human medical conditions and treatment, e.g. in relation to inflammatory processes, remains elusive, particularly due to a lack of appropriate in vivo data. Here, we show for the first time that primary cultures of patient derived HPMCs are functionally connected via membranous nanotubes. NT formation appears to be actin cytoskeleton dependent, mediated by the action of filopodia. Importantly, significant variances in NT numbers between different donors as a consequence of pathophysiological alterations were observable. Furthermore, we show that TNF-α induces nanotube formation and demonstrate a strong correlation of NT connectivity in accordance with the cellular cholesterol level and distribution, pointing to a complex involvement of NTs in inflammatory processes with potential impact for clinical treatment.
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Affiliation(s)
- Julia Ranzinger
- Department of Nephrology, University of Heidelberg, Heidelberg, Germany.
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Wong IKY, Andriessen A, Charles HE, Thompson D, Lee DTF, So WKW, Abel M. Randomized controlled trial comparing treatment outcome of two compression bandaging systems and standard care without compression in patients with venous leg ulcers. J Eur Acad Dermatol Venereol 2011; 26:102-10. [PMID: 22077933 DOI: 10.1111/j.1468-3083.2011.04327.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND In Hong Kong, at the time of the study, compression treatment was not considered usual care for venous leg ulcer patients. AIM This randomized controlled trial compared quality of life (QOL) aspects in venous leg ulcer patients of over 55-years of age, of short-stretch compression (SSB), four-layer compression bandaging (4LB) and usual care (UC) (moist wound healing dressing, no compression). METHOD Study period was 24-weeks, the primary outcome was the patient functional status, disease-specific and generic health-related QOL measures and ulcer healing rates, comparing week 1 vs. week 24 (end) results. Assessments included photogrammetry, Brief Pain Inventory, SF-12 Health Survey, Charing Cross Venous Ulcer Questionnaire and Frenchay Activity Index. Data analysis was performed using, where appropriate; Kaplan Meier and log rank chi-square and the repeated measures analysis of variance test. RESULTS A total of 321 patients participated in the study, 45 (14%) withdrew for various reasons. Compression bandaging in both groups significantly reduced pain (P < 0.0001) and improved functional status and QOL. Healing rate at 24 weeks for both compression groups was significant (P < 0.001); for SSB this was 72.0% (77/107) vs. 67.3% in the 4LB group (72/107) and 29.0% (31/107) with usual care. The reduction in ulcer area from weeks 12 to 24 was significant only for SSB (P < 0.047). CONCLUSION Compression was shown to be feasible for elderly community care patients in Hong Kong and is currently implemented as part of standard venous leg ulcer treatment.
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Affiliation(s)
- I K Y Wong
- School of Nursing, Hong Kong Sanatorium and Hospital, Hong Kong, China
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Wiegand C, Abel M, Ruth P, Hipler UC. Superabsorbent polymer-containing wound dressings have a beneficial effect on wound healing by reducing PMN elastase concentration and inhibiting microbial growth. J Mater Sci Mater Med 2011; 22:2583-2590. [PMID: 21870081 DOI: 10.1007/s10856-011-4423-3] [Citation(s) in RCA: 33] [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] [Received: 04/19/2011] [Accepted: 08/10/2011] [Indexed: 05/31/2023]
Abstract
A comprehensive in vitro approach was used to assess the effects of superabsorbent polymer (SAP) containing wound dressings in treatment of non-healing wounds. A slight negative effect on HaCaT cells was noted in vitro which is most likely due to the Ca(2+) deprivation of the medium by binding to the SAP. It could be shown that SAP wound dressings are able to bind considerable amounts of elastase reducing enzyme activity significantly. Furthermore, SAP's inhibit the formation of free radicals. The SAP-containing wound dressings tested also exhibited a significant to strong antimicrobial activity effectively impeding the growth of gram-negative and gram-positive bacteria as well as yeasts. In conclusion, in vitro data confirm the positive effect of SAP wound dressings observed in vivo and suggest that they should be specifically useful for wound cleansing.
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Affiliation(s)
- C Wiegand
- Department of Dermatology, University Medical Center, Erfurter Str. 34, 07740 Jena, Germany.
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Bahr S, Mustafi N, Hättig P, Piatkowski A, Mosti G, Reimann K, Abel M, Dini V, Restelli J, Babadagi-Hardt Z, Abbritti F, Eberlein T, Wild T, Bandl K, Schmitz M. Clinical efficacy of a new monoflament fibre-containing wound debridement product. J Wound Care 2011; 20:242-8. [DOI: 10.12968/jowc.2011.20.5.242] [Citation(s) in RCA: 36] [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] [Indexed: 11/11/2022]
Affiliation(s)
- S. Bahr
- Therapy Centre for Chronic Wounds, Lahr, Germany
| | | | - P. Hättig
- Therapy Centre for Chronic Wounds, Lahr, Germany
| | | | - G. Mosti
- Clinica M.D. Barbantini, Lucca, Italy
| | - K. Reimann
- Care Consulting Service, Flammersfeld, Germany
| | - M. Abel
- Lohmann & Rauscher GmbH & Co, KG, Rengsdorf, Germany
| | - V. Dini
- Wound Healing Research Unit, Department of Dermatology, University of Pisa, Italy
| | - J. Restelli
- Operative Unit of Long-Term Care, USSl 2, Feltre (BL), Italy
| | | | - F. Abbritti
- Operative Unit of Vascular Surgery, Garbagnate milanese, Italy
| | | | - T. Wild
- Wound Consulting GmbH, Vienna, Austria
| | - K. Bandl
- Wound and Pain Centre, Wiener neustadt, Austria
| | - M. Schmitz
- Lohmann & Rauscher GmbH & Co, KG, Rengsdorf, Germany
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Slany E, Abel M, Reuter W. [Geriatric surgery or geriatrisation of surgical medicine]. Versicherungsmedizin 2011; 63:3-10. [PMID: 21488383] [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: 05/30/2023]
Abstract
In the western industrial nations the proportion of old people (according to WHO definition people over 75 years) has been rising for many years and with it the amount of surgical treatment on this group of the population. High age does not automatically mean a risk too high for surgical treatment. Very often the reasons for this age group being high-risk patients are hospital admission in an advanced stage of illness or complications due to the illness. Old people are biologically younger than they were years ago. Often they express their perfectly understandable wish for suitable treatment. New treatments and strategies in surgery such as minimal-invasive surgery, endoluminal techniques for heart and vascular surgery, fast-track-concepts, anaesthetising techniques like spinal anaesthesia or the use of better controllable narcotics, improves alleviation of pain, quick mobilisation and early oral nutrition contribute to a minimisation of the risk. Age-related multimorbidity defines the risks of major operations and requires an individual weighing up of benefit and risk. The decision for or against an operation must take the elderly patient's wishes into account. The most important aspect is not only to help the people survive but to enable them to participate in life. In this paper we try to give an overview of geriatric surgery with all its aspects relevant to insurance.
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Affiliation(s)
- E Slany
- Abteilung Leistungsmanagement-Medizinische Beratung der Deutschen Kranken-versicherung AG, Köln
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Abel M, Abel M. Ford lemma for topological *-algebras. Proc Estonian Acad Sci 2011. [DOI: 10.3176/proc.2011.2.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Partsch H, Stout N, Forner-Cordero I, Flour M, Moffatt C, Szuba A, Milic D, Szolnoky G, Brorson H, Abel M, Schuren J, Schingale F, Vignes S, Piller N, Döller W. Clinical trials needed to evaluate compression therapy in breast cancer related lymphedema (BCRL). Proposals from an expert group. INT ANGIOL 2010; 29:442-453. [PMID: 20924349] [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: 05/30/2023]
Abstract
AIM A mainstay of lymphedema management involves the use of compression therapy. Compression therapy application is variable at different levels of disease severity. Evidence is scant to direct clinicians in best practice regarding compression therapy use. Further, compression clinical trials are fragmented and poorly extrapolable to the greater population. An ideal construct for conducting clinical trials in regards to compression therapy will promote parallel global initiatives based on a standard research agenda. The purpose of this article is to review current evidence in practice regarding compression therapy for BCRL management and based on this evidence, offer an expert consensus recommendation for a research agenda and prescriptive trials. Recommendations herein focus solely on compression interventions. METHODS This document represents the proceedings of a session organized by the International Compression Club (ICC) in June 2009 in Ponzano (Veneto, Italy). The purpose of the meeting was to enable a group of experts to discuss the existing evidence for compression treatment in breast cancer related lymphedema (BCRL) concentrating on areas where randomized controlled trials (RCTs) are lacking. RESULTS The current body of research suggests efficacy of compression interventions in the treatment and management of lymphedema. However, studies to date have failed to adequately address various forms of compression therapy and their optimal application in BCRL. We offer recommendations for standardized compression research trials for prophylaxis of arm lymphedema and for the management of chronic BCRL. Suggestions are also made regarding; inclusion and exclusion criteria, measurement methodology and additional variables of interest for researchers to capture. CONCLUSION This document should inform future research trials in compression therapy and serve as a guide to clinical researchers, industry researchers and lymphologists regarding the strengths, weaknesses and shortcomings of the current literature. By providing this construct for research trials, the authors aim to support evidence-based therapy interventions, promote a cohesive, standardized and informative body of literature to enhance clinical outcomes, improve the quality of future research trials, inform industry innovation and guide policy related to BCRL.
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Affiliation(s)
- H Partsch
- Dermatology, Medical University of Vienna, Vienna, Austria
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Abel M, Fürste H, Pringsheim W, Sievers J, Otto J. Transfusionsbedingte Säurebelastung durch Erythrozytenkonzentrate im Neugeborenenalter. Transfus Med Hemother 2009. [DOI: 10.1159/000221673] [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: 11/19/2022] Open
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Abel M, Elsinger W, Sutor A, de Gregorio G, Peukert W. Untersuchungen zur transfusionsmedizinischen Validität von autologem Plazentablut. Transfus Med Hemother 2009. [DOI: 10.1159/000221737] [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: 11/19/2022] Open
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Abel M, Vogel W. Osmolalitätsparameter und Nierenfunktion polytraumatisierter Intensivpatienten. Transfus Med Hemother 2009. [DOI: 10.1159/000221361] [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: 11/19/2022] Open
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Affiliation(s)
- A. Andriessen
- Andriessen Consultants, Malden, the Netherlands and Akademie-ZWM, Austria, Germany and Switzerland
| | - R. Polignano
- Department of Cardiovascular Rehabilitation, Piero Palagi Hospital, Florence, Italy
| | - M. Abel
- Lohmann ' Rauscher GmbH ' Co KG, Rengsdorf, Germany
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Odemuyiwa SO, Ebeling C, Duta V, Abel M, Puttagunta L, Cravetchi O, Majaesic C, Vliagoftis H, Moqbel R. Tryptophan catabolites regulate mucosal sensitization to ovalbumin in respiratory airways. Allergy 2009; 64:488-92. [PMID: 18721245 DOI: 10.1111/j.1398-9995.2008.01809.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [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: 11/28/2022]
Abstract
BACKGROUND Indoleamine 2,3 dioxygenase (IDO), the rate-limiting enzyme in tryptophan catabolism, is important in generating tolerance at the foetal-maternal interface. Studies using 1-methyl-tryptophan (1-MT), the specific inhibitor of IDO, showed that this enzyme is important in interferon-gamma (IFN-gamma)-dependent inhibition of allergic inflammation in the respiratory airway during immunotherapy. AIMS OF STUDY We investigated the role of IDO in the development of allergic sensitization, leading to allergic inflammation and airway hyper-responsiveness (AHR). METHODS We used a mouse model to generate mucosal tolerance to lipopolysaccharide-free ovalbumin (OVA) following repeated intranasal inoculation of OVA over a 3-day period. We tested the successful induction of tolerance by subsequent intraperitoneal (i.p.) sensitization followed by intranasal challenge with OVA. A slow-release pellet of 1-MT implanted into mice was used to block IDO activity prior to repeated intranasal inoculation of OVA. We measured T-cell proliferation in response to OVA, determined airway inflammation, and measured AHR to intranasal methacholine to investigate the role of IDO in sensitization to OVA. RESULTS Repeated intranasal administration of OVA generated tolerance and prevented a subsequent sensitization to OVA via the i.p. route. This response was inhibited in mice receiving a slow-release pellet of 1-MT. However, we successfully reconstituted tolerance in mice receiving 1-MT following intra-peritoneal injection of a mixture of kynurenine and hydroxyanthranilic acid. CONCLUSION Our data suggest that, in addition to their role in IFN-gamma-mediated inhibition of allergic airway inflammation, products of tryptophan catabolism play an important role in the prevention of sensitization to potential allergens in the respiratory airway.
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Affiliation(s)
- S O Odemuyiwa
- Pulmonary Research Group, Department of Paediatrics, University of Alberta, Edmonton, AB, Canada
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Oeffinger D, Bagley A, Rogers S, Gorton G, Kryscio R, Abel M, Damiano D, Barnes D, Tylkowski C. Outcome tools used for ambulatory children with cerebral palsy: responsiveness and minimum clinically important differences. Dev Med Child Neurol 2008; 50:918-25. [PMID: 19046185 PMCID: PMC2990955 DOI: 10.1111/j.1469-8749.2008.03150.x] [Citation(s) in RCA: 204] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This prospective longitudinal multicenter study of ambulatory children with cerebral palsy (CP) examined changes in outcome tool score over time, tool responsiveness, and used a systematic method for defining minimum clinically important differences (MCIDs). Three hundred and eighty-one participants with CP (Gross Motor Function Classification System [GMFCS] Levels I-III; age range 4-18y, mean age 11y [SD 4y 4mo]; 265 diplegia, 116 hemiplegia; 230 males, 151 females). At baseline and follow-up at least 1 year later, Functional Assessment Questionnaire, Gross Motor Function Measure, Pediatric Quality of Life Inventory, Pediatric Outcomes Data Collection Instrument, Pediatric Functional Independence Measure, temporal-spatial gait parameters, and oxygen cost were collected. Adjusted standardized response means determined tool responsiveness for nonsurgical (n=292) and surgical (n=87) groups at GMFCS Levels I to III. Most scores reaching medium or large effect sizes were for GMFCS Level III. Nonsurgical group change scores were used to calculate MCID thresholds for ambulatory children with CP. These values were verified by examining participants who changed GMFCS levels. Tools measuring function were responsive when a change large enough to cause a change in GMFCS level occurred. MCID thresholds assess change in study populations over time, and serve as the basis for designing prospective intervention studies.
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Affiliation(s)
- D Oeffinger
- Shriners Hospital for Children, Lexington, KY 40502, USA.
| | | | | | | | - R Kryscio
- University of Kentucky, Lexington, KY
| | - M Abel
- University of Virginia, Charlottesville, VA
| | - D Damiano
- Washington University, St. Louis, MO
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Milde P, Zerweck U, Eng LM, Abel M, Giovanelli L, Nony L, Mossoyan M, Porte L, Loppacher C. Interface dipole formation of different ZnPcCl(8) phases on Ag(111) observed by Kelvin probe force microscopy. Nanotechnology 2008; 19:305501. [PMID: 21828762 DOI: 10.1088/0957-4484/19/30/305501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Recently, we investigated the adsorption of octachloro zinc phthalocyanine (ZnPcCl(8)) on Ag(111) by scanning tunneling microscopy. Compared to the standard phthalocyanine, halogenated phthalocyanine molecules show a much more complex binding behavior, which results in the formation of three different structural phases. These phases follow from the ordering process with the formation of 8, 4 and 0 intermolecular hydrogen-halogen bonds (Abel et al 2006 ChemPhysChem 7 82). In the present work we investigate these phases by Kelvin probe force microscopy in order to quantitatively deduce the electric interface barrier of the first monolayer. Our measurements reveal that the binding behavior does not only affect the structural ordering but also the interface dipole formation, which leads to different work functions. The fact that we observe interface barriers of opposite signs between ordered and disordered molecular layers underlines the importance of exactly knowing the molecular arrangement at the interface when assembling organic molecule devices.
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Affiliation(s)
- P Milde
- Institute of Applied Photophysics, Technische Universität Dresden, D-01062 Dresden, Germany
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Rabe E, Partsch H, Jünger M, Abel M, Achhammer I, Becker F, Cornu-Thenard A, Flour M, Hutchinson J, Issberner K, Moffatt C, Pannier F. Guidelines for clinical studies with compression devices in patients with venous disorders of the lower limb. Eur J Vasc Endovasc Surg 2008; 35:494-500. [PMID: 18249571 DOI: 10.1016/j.ejvs.2007.08.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Accepted: 08/02/2007] [Indexed: 10/22/2022]
Abstract
OBJECTIVES The scientific quality of published clinical trials is generally poor in studies where compression devices have been assessed in the management of venous disease. The authors' aim was to establish a set of guidelines which could be used in the design of future clinical trials of compression treatments for venous diseases. DESIGN Consensus conference leading to a consensus statement. METHODS The authors form a expert consensus group known as the International Compression Club (ICC). This group obtained published medical literature in the field of compression treatment in venous disease by searching medical literature databases. The literature was studied by the group which attended a consensus meeting. A draft document was circulated to ICC members and revised until agreement between contributors was reached. RESULTS The authors have prepared a set of guidelines which should be given consideration when conducting studies to assess the efficacy of compression in venous disease. CONCLUSIONS The form of compression therapy including the comparators used in the clinical study must be clearly characterised. In future studies the characteristics of the material provided by the manufacturer should be described including in vivo data on pressure and stiffness of the final compression system. The pressure exerted on the distal lower leg should be stated in mmHg and the method of pressure determination must be quoted.
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Affiliation(s)
- E Rabe
- Department of Dermatology, University of Bonn, Germany.
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Haniffa M, Ginhoux F, Abel M, Bullock S, Alshemali S, Merad M, Collin M. 376: Persistent Recipient Antigen-Presenting Cells in Human Hematopoietic Stem Cell Transplantation: Identification of a Dermal Subset that Outlives Epidermal Langerhans Cells. Biol Blood Marrow Transplant 2008. [DOI: 10.1016/j.bbmt.2007.12.386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abel M, Pringsheim W. Intravasales Monitoring durch Arteria axillaris-Kanülierung im Säuglingsalter. Anasthesiol Intensivmed Notfallmed Schmerzther 2008. [DOI: 10.1055/s-2007-1002474] [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: 10/21/2022]
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Abel M, Weerda H, Deilmann M. Das stumpfe Halstrauma - Zur Gefahr der sekundären respiratorischen Insuffizienz. Anasthesiol Intensivmed Notfallmed Schmerzther 2008. [DOI: 10.1055/s-2007-1003886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kiss I, Abel M, George G. Über die Anwendung von Physostigmin in der Anästhesie und Intensivmedizin. Anasthesiol Intensivmed Notfallmed Schmerzther 2008. [DOI: 10.1055/s-2007-1003868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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O'Shaughnessy PJ, Abel M, Charlton HM, Hu B, Johnston H, Baker PJ. Altered expression of genes involved in regulation of vitamin A metabolism, solute transportation, and cytoskeletal function in the androgen-insensitive tfm mouse testis. Endocrinology 2007; 148:2914-24. [PMID: 17332066 DOI: 10.1210/en.2006-1412] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Androgens are essential for the development and maintenance of spermatogenesis, but the underlying mechanisms of androgen action in the testis remain unclear. To help clarify these mechanisms, gene expression was measured in testes of pubertal (20 d old), androgen-insensitive, testicular feminized (Tfm) mice and in normal controls. Using microarrays (Affymetrix chips 430A and 430B), initial data identified a large number of genes down-regulated in the Tfm testis (>4700). These genes were largely of germ cell origin, reflecting the arrest of spermatogenesis that is apparent in the 20-d-old Tfm testis. Subsequent screening in vitro and in silico of this gene set identified 20 genes of a somatic tubular origin that were significantly down-regulated in the Tfm testis and six genes that were significantly up-regulated. Altered expression of these genes was confirmed by real-time PCR, and genes down-regulated in the Tfm testis were shown to be up-regulated in testes of hypogonadal (hpg) mice treated with androgen. In a developmental study using real-time PCR most of the regulated genes showed normal expression during fetal and neonatal development and deviated from control only between 10 and 20 d. In all cases, expression was also reduced in the adult, although interpretation is more complex because of the inherent cryptorchidism in the adult Tfm mouse. Of the total number of somatic genes showing differential expression in the Tfm testis, 50% were associated with three separate groups of genes involved in regulation of vitamin A metabolism, solute transportation, and cytoskeletal function. Thus, effects of androgens on tubular function and spermatogenesis may be mediated in part through regulation of the tubular environment and control of retinoic acid concentrations.
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Affiliation(s)
- P J O'Shaughnessy
- Division of Cell Sciences, University of Glasgow Veterinary School, Bearsden Road, Glasgow, Scotland, United Kingdom.
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