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Zirn B, Bernbeck U, Alt K, Oeffner F, Gerhardinger A, Has C. Rothmund-Thomson syndrome type 1 caused by biallelic ANAPC1 gene mutations. Skin Health Dis 2021; 1:e12. [PMID: 35664819 PMCID: PMC9060067 DOI: 10.1002/ski2.12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/18/2020] [Accepted: 12/26/2020] [Indexed: 01/02/2023]
Abstract
Background Rare syndromic skin disorders may represent a diagnostic challenge. Aims We report a unique case associating cutaneous manifestations and developmental delay. Materials & Methods The affected 14 months old boy had poikiloderma, facial dysmorphism with deep‐set eyes, atrichia, as well as nail dysplasia and non‐descended testes. In addition, his psychomotor development was delayed. Exome sequencing and molecular karyotyping via array‐CGH (oligo‐array, 180k Agilent, design 22060) were performed. Results Mutations in RECQL4 (found in patients with RTS2) were first excluded. In the ANAPC1 gene, a novel combination of a recurrent intronic mutation (c.2705‐198C>T) and a deletion of the second ANAPC1 allele was detected, thus confirming the clinical diagnosis of RTS1. The deletion on chromosome 2q13 comprised further genes and spanned 1,7 megabases. Heterozygous deletions in this region are known as 2q13 microdeletion syndrome and are associated with developmental delay, autism and facial dysmorphism. Discussion The genetic findings most probably explain both, the RTS1 features and the developmental delay. Genetic diagnosis in RTS is indispensable to confirm the specific subtype and its associated risks: juvenile cataracts are features of RTS1 (ANAPC1 gene), whereas a high risk of osteosarcoma is part of RTS2 (RECQL4 gene). Thus, the patient described here is at high risk for the development of juvenile cataracts and requires regular ophthalmologic examination. Conclusion This case report underlines the necessity of thorough clinical diagnosis prior to genetic diagnosis of RTS1, since the recurrent intronic ANAPC1 mutation is otherwise missed.
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Affiliation(s)
- B Zirn
- Genetikum Stuttgart Genetic Counselling and Diagnostics Stuttgart Germany
| | - U Bernbeck
- Department of Pediatrics Rems-Murr-Klinikum Winnenden Germany
| | - K Alt
- Genetikum Neu-Ulm Genetic Counselling and Diagnostics Neu-Ulm Germany
| | - F Oeffner
- Genetikum Neu-Ulm Genetic Counselling and Diagnostics Neu-Ulm Germany
| | - A Gerhardinger
- Genetikum Neu-Ulm Genetic Counselling and Diagnostics Neu-Ulm Germany
| | - C Has
- Department of Dermatology Faculty of Medicine University of Freiburg Freiburg Germany
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Richart A, Khalaji M, Reddy M, Alt K, Kiriazis H, Gille A, Kingwell B. 087 Blockade of VEGF-B Improves Cardiac Function after Myocardial Infarction in Insulin-Resistant Mice. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Medcalf RL, Hagemeyer CE, Alt K. Magnetic fibrinolysis: putting the therapeutic wheels in a corkscrew motion. J Thromb Haemost 2018; 16:615-617. [PMID: 29634087 DOI: 10.1111/jth.13969] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Indexed: 11/28/2022]
Affiliation(s)
- R L Medcalf
- Australian Centre for Blood Diseases, Monash University, Melbourne, Australia
| | - C E Hagemeyer
- Australian Centre for Blood Diseases, Monash University, Melbourne, Australia
| | - K Alt
- Australian Centre for Blood Diseases, Monash University, Melbourne, Australia
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4
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Molloy CP, Yao Y, Kammoun H, Bonnard T, Hoefer T, Alt K, Tovar-Lopez F, Rosengarten G, Ramsland PA, van der Meer AD, van den Berg A, Murphy AJ, Hagemeyer CE, Peter K, Westein E. Shear-sensitive nanocapsule drug release for site-specific inhibition of occlusive thrombus formation. J Thromb Haemost 2017; 15:972-982. [PMID: 28267256 DOI: 10.1111/jth.13666] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Indexed: 11/29/2022]
Abstract
Essentials Vessel stenosis due to large thrombus formation increases local shear 1-2 orders of magnitude. High shear at stenotic sites was exploited to trigger eptifibatide release from nanocapsules. Local delivery of eptifibatide prevented vessel occlusion without increased tail bleeding times. Local nanocapsule delivery of eptifibatide may be safer than systemic antiplatelet therapies. SUMMARY Background Myocardial infarction and stroke remain the leading causes of mortality and morbidity. The major limitation of current antiplatelet therapy is that the effective concentrations are limited because of bleeding complications. Targeted delivery of antiplatelet drug to sites of thrombosis would overcome these limitations. Objectives Here, we have exploited a key biomechanical feature specific to thrombosis, i.e. significantly increased blood shear stress resulting from a reduction in the lumen of the vessel, to achieve site-directed delivery of the clinically used antiplatelet agent eptifibatide by using shear-sensitive phosphatidylcholine (PC)-based nanocapsules. Methods PC-based nanocapsules (2.8 × 1012 ) with high-dose encapsulated eptifibatide were introduced into microfluidic blood perfusion assays and into in vivo models of thrombosis and tail bleeding. Results Shear-triggered nanocapsule delivery of eptifibatide inhibited in vitro thrombus formation selectively under stenotic and high shear flow conditions above a shear rate of 1000 s-1 while leaving thrombus formation under physiologic shear rates unaffected. Thrombosis was effectively prevented in in vivo models of vessel wall damage. Importantly, mice infused with shear-sensitive antiplatelet nanocapsules did not show prolonged bleeding times. Conclusions Targeted delivery of eptifibatide by shear-sensitive nanocapsules offers site-specific antiplatelet potential, and may form a basis for developing more potent and safer antiplatelet drugs.
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Affiliation(s)
- C P Molloy
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Y Yao
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - H Kammoun
- Haematopoiesis and Leukocyte Biology, Baker Heart & Diabetes Institute, Melbourne, Victoria, Australia
| | - T Bonnard
- Nano Biotechnology Laboratory, Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
| | - T Hoefer
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - K Alt
- Nano Biotechnology Laboratory, Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
| | - F Tovar-Lopez
- School of Engineering, RMIT University, Melbourne, Victoria, Australia
| | - G Rosengarten
- School of Engineering, RMIT University, Melbourne, Victoria, Australia
| | - P A Ramsland
- School of Science, RMIT University, Bundoora, Victoria, Australia
- Centre for Biomedical Research, Burnet Institute, Melbourne, Victoria, Australia
- Department of Immunology, Monash University, Melbourne, Victoria, Australia
- Department of Surgery at Austin Health, University of Melbourne, Heidelberg, Victoria, Australia
| | - A D van der Meer
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - A van den Berg
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - A J Murphy
- Haematopoiesis and Leukocyte Biology, Baker Heart & Diabetes Institute, Melbourne, Victoria, Australia
| | - C E Hagemeyer
- Nano Biotechnology Laboratory, Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
| | - K Peter
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - E Westein
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
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Heywood S, Henstridge D, Richart A, Alt K, Carey A, Kammoun H, Delbridge L, Hagemeyer C, Febbraio M, Kingwell B, Siebel A. High-density lipoprotein (HDL) is a novel activator of cardiac glucose metabolism in both healthy and insulin resistant mice. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.179] [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: 10/23/2022]
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Tenhagen BA, Vossenkuhl B, Käsbohrer A, Alt K, Kraushaar B, Guerra B, Schroeter A, Fetsch A. Methicillin-resistant Staphylococcus aureus in cattle food chains - prevalence, diversity, and antimicrobial resistance in Germany. J Anim Sci 2014; 92:2741-51. [PMID: 24778337 DOI: 10.2527/jas.2014-7665] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Livestock-associated methicillin-resistant Staphylococcus aureus (MRSA) have been found in various farm animal species throughout the world. It was the objective of this study to estimate the prevalence of MRSA in different cattle food chains (milk, beef, and veal) in Germany, to analyze the MRSA diversity along each food chain and to compare the characteristics of the different subtypes. Samples were collected between 2009 and 2012 from dairy herds (bulk tank milk), veal herds (dust from the stables), veal calves, and beef cattle at slaughter (nasal swabs) and carcasses of veal calves (surface cuts) and beef as well as veal at retail. Sampling was proportionally distributed over the country according to the cattle population (on-farm sampling), slaughterhouse capacity (abattoir samples), and the human population (meat at retail). Methicillin-resistant S. aureus were isolated using harmonized methods from all sample types and populations investigated. The highest proportion of positive samples was found in nasal swabs from veal calves at slaughter in 2012 (144/320; 45.0%) and the lowest rate in bulk tank milk in 2009 (14/388; 4.1%). Most isolates, irrespective of the origin, were from spa types t011 and t034. Both have been assigned to the clonal complex (CC) 398. Few isolates (15/632; 2.4%) were from spa types not associated with the CC398. Spa-type patterns were similar along individual food chains but differed between food chains. Antimicrobial resistance patterns differed between isolates from the different food chains and spa types. Isolates from the veal chain displayed the highest resistance rates. We conclude that there is substantial diversity in the MRSA prevalence across different cattle production sectors.
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Affiliation(s)
- B-A Tenhagen
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
| | - B Vossenkuhl
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
| | - A Käsbohrer
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
| | - K Alt
- Robert Koch Institute, Berlin, Germany
| | - B Kraushaar
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
| | - B Guerra
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
| | - A Schroeter
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
| | - A Fetsch
- Federal Institute for Risk Assessment (BfR), Department Biological Safety, 10589 Berlin, Germany Robert Koch Institute, Berlin, Germany
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7
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Kaesbohrer A, Schroeter A, Tenhagen BA, Alt K, Guerra B, Appel B. Emerging antimicrobial resistance in commensal Escherichia coli with public health relevance. Zoonoses Public Health 2013; 59 Suppl 2:158-65. [PMID: 22958260 DOI: 10.1111/j.1863-2378.2011.01451.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In 2009, 1462 Escherichia coli isolates were collected in a systematic resistance monitoring approach from primary production, slaughterhouses and at retail and evaluated on the basis of epidemiological cut-off values. Besides resistance to antimicrobial classes that have been extensively used for a long time (e.g. sulphonamides and tetracyclines), resistance to (fluoro)quinolones and third-generation cephalosporins was observed. While in the poultry production chain the majority (60%) of isolates from laying hens was susceptible to all antimicrobials tested, most isolates from broilers, chicken meat and turkey meat showed resistance to at least one (85-93%) but frequently even to several antimicrobial classes (73-84%). In the cattle and pig production chain, the share of isolates showing resistance to at least one antimicrobial was lowest (16%) in dairy cows, whereas resistance to at least one antimicrobial ranged between 43% and 73% in veal calves, veal and pork. Resistance rates to ciprofloxacin and nalidixic acid in isolates from broilers were 41.1% and 43.1%, respectively. Likewise, high resistance rates to (fluoro)quinolones were observed in isolates from chicken meat and turkey meat. In contrast, ciprofloxacin resistance was less frequent in E. coli isolates from the cattle and pig production chain with highest rate in veal calves (13.3%). Highest resistance rates to cephalosporins were observed in broilers and chicken meat, with 5.9% and 6.2% of the isolates showing resistance. In dairy cattle and veal, no isolates with cephalosporin resistance were detected, whereas 3.3% of the isolates from veal calves showed resistance to ceftazidime. Resistance to (fluoro)quinolones and cephalosporins in E. coli isolates is of special concern because they are critically important antimicrobials in human antimicrobial therapy. The emergence of this resistance warrants increased monitoring. Together with continuous monitoring of antimicrobial usage, management strategies should be regularly assessed and adapted.
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Affiliation(s)
- A Kaesbohrer
- Federal Institute for Risk Assessment, Department for Biological Safety, National Reference Laboratory for Antimicrobial Resistance, Berlin, Germany.
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8
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Kreausukon K, Fetsch A, Kraushaar B, Alt K, Müller K, Krömker V, Zessin KH, Käsbohrer A, Tenhagen BA. Prevalence, antimicrobial resistance, and molecular characterization of methicillin-resistant Staphylococcus aureus from bulk tank milk of dairy herds. J Dairy Sci 2012; 95:4382-8. [PMID: 22818451 DOI: 10.3168/jds.2011-5198] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2011] [Accepted: 04/06/2012] [Indexed: 11/19/2022]
Abstract
It was the objective of the study to estimate the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in bulk tank milk from German dairy herds and to characterize isolates from bulk tank milk with respect to their Staph. aureus protein A (spa) and staphylococcal cassette chromosome mec (SCCmec) type, their phenotypic antimicrobial resistance and resistance- resp. virulence-associated genes using broth microdilution and a microarray for Staph. aureus. Bulk tank milk samples (25 mL) were tested for MRSA using a 2-step selective enrichment protocol. Presumptive MRSA were confirmed by PCR. Thirty-six isolates collected from bulk tank milk of dairy herds in 2009 and 2010 were included in the characterization. All isolates displayed spa-types assigned to the clonal complex CC398. Based on the epidemiological cut-off values for the interpretation of minimum inhibitory concentrations isolates were resistant to tetracycline (100%), clindamycin (58%), erythromycin (52%), quinupristin/dalfopristin (36%), and kanamycin (27%). Isolates did not carry genes associated with typical virulence factors for Staph. aureus such as the Panton-Valentine leukocidin. However, they did carry hemolysin genes. Livestock-associated MRSA of CC398 does occur in German dairy herds and the strains have similar properties as described for strains from pigs.
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Affiliation(s)
- K Kreausukon
- Department Biological Safety, Federal Institute for Risk Assessment, 12277 Berlin, Germany
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9
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Stingl K, Knüver MT, Vogt P, Buhler C, Krüger NJ, Alt K, Tenhagen BA, Hartung M, Schroeter A, Ellerbroek L, Appel B, Käsbohrer A. Quo vadis? - Monitoring Campylobacter in Germany. Eur J Microbiol Immunol (Bp) 2012; 2:88-96. [PMID: 24611125 DOI: 10.1556/eujmi.2.2012.1.12] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 01/16/2012] [Indexed: 11/19/2022] Open
Abstract
Campylobacter is a poorly recognized foodborne pathogen, leading the statistics of bacterially caused human diarrhoea in Europe during the last years. In this review, we present qualitative and quantitative German data obtained in the framework of specific monitoring programs and from routine surveillance. These also comprise recent data on antimicrobial resistances of food isolates. Due to the considerable reduction of in vitro growth capabilities of stressed bacteria, there is a clear discrepancy between the detection limit of Campylobacter by cultivation and its infection potential. Moreover, antimicrobial resistances of Campylobacter isolates established during fattening of livestock are alarming, since they constitute an additional threat to human health. The European Food Safety Authority (EFSA) discusses the establishment of a quantitative limit for Campylobacter contamination of broiler carcasses in order to achieve an appropriate level of protection for consumers. Currently, a considerable amount of German broiler carcasses would not comply with this future criterion. We recommend Campylobacter reduction strategies to be focussed on the prevention of fecal contamination during slaughter. Decontamination is only a sparse option, since the reduction efficiency is low and its success depends on the initial contamination concentration.
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Affiliation(s)
- K Stingl
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - M-T Knüver
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - P Vogt
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - C Buhler
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - N-J Krüger
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - K Alt
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - B-A Tenhagen
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - M Hartung
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - A Schroeter
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - L Ellerbroek
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - B Appel
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
| | - A Käsbohrer
- Department of Biological Safety, Federal Institute for Risk Assessment Diedersdorfer Weg 1, 12277 Berlin Germany
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Neisser A, Alt K, Stern C, Scholtz W, Grünfeld A, Michaelis L, Volk R, Lipschütz B, Glück A, Friedlaender M, Citron H, Königstein H, Blumenfeld A, Salmon P, Saalfeld E, Ledermann R, Joseph M, Siebert C, Juliusberg F. Die Behandlung der Syphilis mit dem Ehrlichschen Präparat 606. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1143111] [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: 10/20/2022]
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Michiels I, Bodem F, Alt K, Wackerhagen A, Brussatis F, Walther V. Funktionelle Muskelaktivitätsanalyse durch statistische Elektromyographie zyklischer Körperbewegungen. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.1988.33.s2.277] [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: 11/15/2022]
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Wiehr S, Elsäßer-Beile U, Alt K, Bühler P, Wolf P, Judenhofer MS, Reischl G, Pichler BJ. PET Imaging of Anti-PSMA Antibodies as Novel Agents for Targeting Prostate Cancer. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221633] [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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13
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Buitrago-Téllez CH, Schilli W, Bohnert M, Alt K, Kimmig M. A comprehensive classification of craniofacial fractures: postmortem and clinical studies with two- and three-dimensional computed tomography. Injury 2002; 33:651-68. [PMID: 12213415 DOI: 10.1016/s0020-1383(02)00119-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A comprehensive classification of midfacial/craniofacial fractures, based on two- and three-dimensional computed tomography (2D and 3D-CT) is presented. We performed a postmortem analysis of 24 patients who had died from trauma with signs of craniofacial fractures, based on 2D and 3D-CT studies with pathoanatomical findings. In addition, CT findings for 100 patients with craniofacial injuries requiring an emergency CT were correlated with surgical findings and follow-up results. On the basis of the analysis of a total of 377 fractures a classification system is proposed. The system is based on the use of the AO/ASIF (Arbeitsgemeinschaft für Osteosynthesefragen/Association for the Study of Internal Fixation) scheme, defining three types (A, B, C), three groups within each type (e.g. A1, A2, A3) and three subgroups within each group (e.g. A1.1, A1.2, A1.3) with increasing severity from A1.1 (lowest) to C3.3 (highest). The craniofacial region is divided into three units: the lower midface (I), the upper midface (II) and the craniobasal-facial unit (III). Lateral and central fractures are also distinguished. Type A fractures are non-displaced fractures, type B are displaced fractures and type C are complex/defect fractures. Groups A1, B1 and C1 comprise fractures of an isolated unit; groups A2, B2 and C2, combined fractures without involvement of the skull base; and groups A3, B3 and C3 are those combined fractures with involvement of the skull base. A correlation between the severity of the fracture and (i). the number of posttraumatic functional limitations (Spearman rank test, correlation coefficient r=0.42), (ii). the need for bone grafting or dural plastic (r=0.39) and (iii). facial asymmetry (r=0.37), was observed. The proposed classification system allows standardised documentation of midfacial and craniofacial fractures, including those not precisely defined by the Le Fort classification scheme.
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Affiliation(s)
- Carlos H Buitrago-Téllez
- Department of Radiology, University Hospital Basel, Petersgraben 4, CH-4031, Basel, Switzerland.
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Bähr W, Stoll P, Wächter R, Wimmer B, Alt K. [The use of osteosynthesis screws in child mandibles. Anatomical and mechanical considerations]. Dtsch Zahnarztl Z 1990; 45:791-3. [PMID: 2135274] [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: 12/30/2022]
Abstract
Thirty seven child mandibular skeletons were analysed radiographically and computer tomographically to establish if there is enough room for osteosynthesis screws. The study demonstrated that in the primary and early mixed dentition there is not enough room in the canine or post-canine region to allow the installation of an osteosynthesis screw without damaging the inferior dental nerve or teeth buds. However, in the later stage of permanent tooth eruption the entire caudal portion of the mandibular body seems to provide sufficient room for osteosynthesis screws. SEM examinations of implant beds of 100 2 mm AO miniscrews inserted into the mandibles of eight fresh cadavers aged eight to twelve years showed cracks, as well as signs of squashing, crushing and shearing stress, regardless of whether the screws were pretapped or not. When, during screw insertion, the axis of the screw deviated by at least 10 degrees from the axis of the tap, two crossing thread courses resulted.
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Affiliation(s)
- W Bähr
- Universitätsklinik für Zahn-, Mund- und Kieferheilkunde Freiburg
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Alt K. [Dental diseases are already thousands of years old]. Zahnarztl Mitt 1987; 77:2274, 2277-80, 2285-7. [PMID: 3330378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Alt K. [Prosthetic insufficiency]. Quintessenz 1985; 36:1267-8. [PMID: 3912800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Alt K. [During the Weimar Republic the radio was a beloved educational device]. Zahnarztl Mitt 1984; 74:2325-6. [PMID: 6393643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Hodge CF, Alt K, Schmidt. Untersuchungen uber den electrischen Leitungswiederstand der thierischen Gewebe. The American Journal of Psychology 1894. [DOI: 10.2307/1410975] [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: 11/10/2022]
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