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Abstract
BACKGROUND Spondylodiscitis in children is rare. The condition has an incidence of 2 to 4 % of all infectious skeletal diseases in children. AIM Aim of the article is the presentation of epidemiology, the clinical signs, radiological findings as well the treatment options of non-specific and specific spondylodiscitis in children. METHODS The available literature was reviewed. RESULTS Non-specific spondylodiscitis in children is caused by haematogenous spread of pathogens. Staphylococcus aureus is the most frequently detected bacterium. The clinical signs are unspecific and an Magnetic Resonance Imaging of the spine is the standard radiological procedure to detect spondylodiscitis. In general, the treatment is conservative and includes an antibiotic therapy as well an immobilization of the spine. In endemic areas of the world, specific spondylodiscitis is more common and is caused by Mycobacterium tuberculosis or Brucellae. The treatment is also conservative. For all entities of spondylodiscitis in children, a surgical intervention is only necessary in the case of severe deformities due to the infection or in the case of neurological symptoms. CONCLUSION Elevated infectious laboratory values and back pain or other unspecific symptoms can indicate spondylodiscitis in children. MRI of the spine is necessary to rule out spondylodiscitis.
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Dalhoff A, Schubert S, Vente A. Pharmacodynamics of Finafloxacin, Ciprofloxacin, and Levofloxacin in Serum and Urine against TEM- and SHV-Type Extended-Spectrum-β-Lactamase-Producing Enterobacteriaceae Isolates from Patients with Urinary Tract Infections. Antimicrob Agents Chemother 2017; 61:e02446-16. [PMID: 28193648 PMCID: PMC5404535 DOI: 10.1128/aac.02446-16] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 01/31/2017] [Indexed: 12/17/2022] Open
Abstract
The pharmacodynamics of finafloxacin, ciprofloxacin, and levofloxacin against extended-spectrum-β-lactamase (ESBL)-producing Enterobacteriaceae isolates were compared. Since quinolones lose activity in acidic media, and particularly in urine, their activities were tested in parallel under conventional conditions and in acidic artificial urine. For this purpose, TEM- and SHV-type ESBL-producing Escherichia coli and Klebsiella pneumoniae strains and their wild-type counterparts were exposed in a modified Grasso model to simulated concentrations of drugs in serum and urine following oral doses of either finafloxacin at 800 mg once a day (q.d.), immediate-release ciprofloxacin at 500 mg twice a day (b.i.d.), extended-release ciprofloxacin at 1,000 mg q.d., or levofloxacin at 500 or 750 mg q.d. The concentrations of the drugs in urine were fitted by compartmental modeling. Bacteria were cultivated in Mueller-Hinton broth (MHB) at pH 7.2 or 5.8 or in artificial urine at pH 5.8. Bacteria were counted every 2 h until 10 h and at 24 h; the areas under the bacterial-count-versus-time curves were calculated. It was found that finafloxacin eliminated all strains within 2 h under all the conditions studied. At all doses studied, ciprofloxacin and levofloxacin were highly active against wild-type strains in MHB at pH 7.2 but lost activity in MHB, and particularly in urine, at pH 5.8. Viable counts of ESBL producers were reduced for 6 to 8 h by 3 log10 titers, but the bacteria regrew thereafter. Ciprofloxacin and levofloxacin were almost inactive against the SHV producer grown in artificial urine. We conclude that pharmacodynamic models using artificial urine may mirror the physiology of urinary tract infections more closely than those using conventional media. In contrast to ciprofloxacin and levofloxacin, finafloxacin gained activity in this model at an acidic pH, maintained activity in artificial urine, and was active against TEM and SHV producers.
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Magistro G, Marcon J, Schubert S, Gratzke C, Stief CG. [Pathogenesis of urinary tract infections : An update]. Urologe A 2017; 56:720-727. [PMID: 28455576 DOI: 10.1007/s00120-017-0391-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Urinary tract infections are among the most common bacterial infections worldwide. The management has become a public health concern of socioeconomic importance. Every second woman will experience at least one episode in her lifetime. Due to the emergence of multiresistant pathogens and the developmental void, treatment has become more challenging over the years. Deciphering the complex molecular interaction between host and pathogen is necessary to identify potent treatment targets for future approaches. The objective of this review is to present novel aspects on the pathogenesis of urinary tract infections and its relevance for clinical practice.
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Ruffing U, Alabi A, Kazimoto T, Vubil DC, Akulenko R, Abdulla S, Alonso P, Bischoff M, Germann A, Grobusch MP, Helms V, Hoffmann J, Kern WV, Kremsner PG, Mandomando I, Mellmann A, Peters G, Schaumburg F, Schubert S, Strauß L, Tanner M, Briesen HV, Wende L, Müller LV, Herrmann M. Community-Associated Staphylococcus aureus from Sub-Saharan Africa and Germany: A Cross-Sectional Geographic Correlation Study. Sci Rep 2017; 7:154. [PMID: 28273954 PMCID: PMC5428059 DOI: 10.1038/s41598-017-00214-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 02/14/2017] [Indexed: 01/29/2023] Open
Abstract
Clonal clusters and gene repertoires of Staphylococcus aureus are essential to understand disease and are well characterized in industrialized countries but poorly analysed in developing regions. The objective of this study was to compare the molecular-epidemiologic profiles of S. aureus isolates from Sub-Saharan Africa and Germany. S. aureus isolates from 600 staphylococcal carriers and 600 patients with community-associated staphylococcal disease were characterized by DNA hybridization, clonal complex (CC) attribution, and principal component (PCA)-based gene repertoire analysis. 73% of all CCs identified representing 77% of the isolates contained in these CCs were predominant in either African or German region. Significant differences between African versus German isolates were found for alleles encoding the accessory gene regulator type, enterotoxins, the Panton-Valentine leukocidin, immune evasion gene cluster, and adhesins. PCA in conjunction with silhouette analysis distinguished nine separable PCA clusters, with five clusters primarily comprising of African and two clusters of German isolates. Significant differences between S. aureus lineages in Africa and Germany may be a clue to explain the apparent difference in disease between tropical/(so-called) developing and temperate/industrialized regions. In low-resource countries further clinical-epidemiologic research is warranted not only for neglected tropical diseases but also for major bacterial infections.
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Burk J, Glauche SM, Brehm W, Crovace A, Francioso E, Hillmann A, Schubert S, Lacitignola L. Characterisation and intracellular labelling of mesenchymal stromal cells derived from synovial fluid of horses and sheep. Vet J 2017; 222:1-8. [PMID: 28410670 DOI: 10.1016/j.tvjl.2017.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 02/09/2017] [Accepted: 02/21/2017] [Indexed: 01/10/2023]
Abstract
Multipotent mesenchymal stromal cells (MSCs) derived from synovial fluid (SF) are considered to be a promising cell type for therapeutic applications in joint disease. However, despite their potential relevance for clinical and experimental studies, there is insufficient knowledge about SF-derived MSCs isolated from horses and sheep. In this study, cells were recovered from healthy SF and bone marrow (BM) of sheep, and from healthy and osteoarthritic SF of horses. Ovine SF-MSCs were used to assess the efficiency of intracellular labelling with quantum dots (QDs). Colony forming units, generation times, trilineage differentiation potential and expression of CD73, CD90 and CD105 at mRNA level were assessed. QD labelling was efficient, with >98% positive cells directly after labelling at 10 nmol/L and >95% positive cells directly after labelling at 2 nmol/L. The label decreased over 7 days of culture, with more persistence at the higher labelling concentration. No significant differences in proliferation were observed. All MSCs had trilineage differentiation potential, but adipogenesis was more distinct in equine samples and chondrogenesis was most pronounced in ovine SF-MSCs. CD73, CD90 and CD105 were expressed in equine and ovine MSCs.
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Schubert S, Hosking M, Balbacid E, Berger F, Voss C, Lee N, Harris K. Optical Coherence Tomography (OCT) Detects Early Coronary Changes Related to Cardiac Allograft Vasculopathy in Pediatric Transplant Recipients: Results from a Multicenter Study Group. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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57
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Schubert S, Peters B, Nordmeyer J, Berger F. PFO-Verschluss mit dem Gore-Septal-Okkluder bei Patienten mit Vorhofseptumaneurysma (ASA) und Z.n. Schlaganfall. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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58
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Schubert S, Kühne T, Dryzek P, Moszura T, Lukaszewski M, Moll J, Nordmeyer S, Berger F, Goreczny S. Two-Center Experience with Novel Image Fusion Software for 3D Guidance of Percutaneous Pulmonary Valve Implantation (PPVI). Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Delmo E, Schubert S, Hetzer R. The Impact of Rejection Episodes after Heart Transplantation on Cardiac Growth in Children. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Degener F, Opgen-Rhein B, Schmidt F, Weigelt A, Wagner R, Müller G, Rentzsch A, Racolta A, Papakostas K, Wiegand G, Ruf B, Hannes T, Reineker K, Kiski D, Khalil M, Steinmetz M, Fischer G, Pickardt T, Messroghli D, Schubert S. Update on Baseline Data and First 1-Year Follow-up of the German Multicenter Myocarditis Registry for Pediatric Patients: “MYKKE”. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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61
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Hosking M, Schubert S, Voss C, Balbacid E, Harris K. QUANTITATIVE ASSESSMENT OF INTIMAL THICKENING USING OPTICAL COHERENCE TOMOGRAPHY - RELATIONSHIP TO CARDIAC ALLOGRAFT VASCULOPATHY. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Harris K, Schubert S, Voss C, Balbacid E, Hosking M. IMPACT OF OPTICAL COHERENCE TOMOGRAPHY ON MANAGEMENT OF PEDIATRIC HEART TRANSPLANT RECIPIENTS: DATA FROM THE INTERNATIONAL PEDIATRIC OCT REGISTRY. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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63
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Schubert S, Bauer A, Molin S, Skudlik C, Geier J. Occupational contact sensitization in female geriatric nurses: Data of the Information Network of Departments of Dermatology (IVDK) 2005-2014. J Eur Acad Dermatol Venereol 2016; 31:469-476. [PMID: 27518760 DOI: 10.1111/jdv.13915] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/08/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND Geriatric nurses (GN) have a high risk of occupational contact dermatitis (OCD), with chronic irritant contact dermatitis predominating. However, allergic contact dermatitis is an important issue as well. Little is known whether the relevant occupational allergen spectrum reported in the 1990s, including fragrances, preservatives, rubber chemicals and ingredients of surface disinfectants to be the most common sensitizers in GN, is still valid. OBJECTIVES To monitor the current allergen spectrum in GN with OCD and verify the validity of the patch test recommendations (baseline-, preservative-, ointment base-, rubber-, disinfectant, series and fragrances) in GN with suspected OCD given by the German Contact Dermatitis Research Group (DKG). METHODS Retrospective analysis of IVDK data (2005-2014) of 743 female GN with OCD, in comparison to 695 GN without OCD. RESULTS GN with OCD reacted significantly more frequently to both fragrance mixes, hydroxyisohexyl 3-cyclohexene carboxaldehyde (HICC), thiuram mix, zinc diethyldithiocarbamate and mercaptobenzothiazole than GN without OCD. Reactions to MDBGN, methylchloroisothiazolinone/methylisothiazolinone and oil of turpentine occurred substantially, but not significantly more frequently among GN with OCD. The latter may be due to former use of a special alcoholic liniment in geriatric care. Among material from the patients' workplaces, tetrazepam was a frequent allergen, due to dust exposure from pill crushing. Furthermore, occupationally used protective gloves, body care products as well as surface disinfectants were often tested positively. CONCLUSIONS The general allergen spectrum in GN with OCD is unchanged, so the DKG patch test recommendations are still valid. Prevention of occupational sensitization should focus on fragrance-free hygiene and body care products, usage of accelerator-free protective gloves and avoidance of drug dust exposure.
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Schubert S, Kanaan M, Eicken A, Mazitelli D, Berger F, Ewert P. Percutaneous Valve Implantation (PVI) with the Use of the SAPIEN XT and Three Valves: Successful Treatment of Right Heart Valvular Lesions and Short-Term Follow-up from Two Centers. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Schubert S, Opgen-Rhein B, Haverkämper G, zu Knyphausen E, Weise A, Jacob A, Rompel O, Schranz D, Müller G, Schmidt F, Kästner M, Udink ten Cate F, Wagner R, Ruf B, Pickardt T, Messroghli D. Myocarditis in Paediatric Patients: Age and Gender Are Influencing Incidence, Severity, and Clinical Course: Initial Data Analysis from the German Multi-Centre Registry (“MYKKE”). Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tortoli E, Richter E, Borroni E, Cabibbe AM, Capitolo E, Cittaro D, Engel R, Hendricks O, Hillemann D, Kristiansen JE, Mariottini A, Schubert S, Cirillo DM. Mycobacterium alsense sp. nov., a scotochromogenic slow grower isolated from clinical respiratory specimens. Int J Syst Evol Microbiol 2015; 66:450-456. [PMID: 26545358 DOI: 10.1099/ijsem.0.000744] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
The name 'Mycobacterium alsiense', although reported in 2007, has not been validly published. Polyphasic characterization of three available strains of this species led us to the conclusion that they represent a distinct species within the genus Mycobacterium. The proposed novel species grows slowly and presents pale yellow-pigmented colonies. Differentiation from other mycobacteria is not feasible on the basis of biochemical and cultural features alone while genetic analysis, extended to eight housekeeping genes and one spacer region, reveals its clear distinction from all other mycobacteria. Mycobacterium asiaticum is the most closely related species on the basis of 16S rRNA gene sequences (similarity 99.3 %); the average nucleotide identity between the genomes of the two species is 80.72 %, clearly below the suggested cut-off (95-96 %). The name Mycobacterium alsense sp. nov. is proposed here for the novel species and replaces the name 'M. alsiense', ex Richter et al. 2007, given at the time of isolation of the first strain. The type strain is TB 1906T ( = DSM 45230T = CCUG 56586T).
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Piguet O, Schubert S, Leyton C, Hodges J. Contrasting longitudinal changes in cognition in alzheimer’s disease and behavioural-variant frontotemporal dementia. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bartosch M, Peters H, Spriestersbach H, D. OHI, Schubert S, Berger F, Schmitt B. Transjugular Pulmonary Valve Implantation—Comparison of the LifeValve Catheter with Established Systems. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1555975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Favretto ME, Krieg A, Schubert S, Schubert US, Brock R. Multifunctional poly(methacrylate) polyplex libraries: A platform for gene delivery inspired by nature. J Control Release 2015; 209:1-11. [PMID: 25862514 DOI: 10.1016/j.jconrel.2015.04.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 04/03/2015] [Accepted: 04/04/2015] [Indexed: 12/23/2022]
Abstract
Polymer-based gene delivery systems have enormous potential in biomedicine, but their efficiency is often limited by poor biocompatibility. Poly(methacrylate)s (PMAs) are an interesting class of polymers which allow to explore structure-activity relationships of polymer functionalities for polyplex formation in oligonucleotide delivery. Here, we synthesized and tested a library of PMA polymers, containing functional groups contributing to the different steps of gene delivery, from oligonucleotide complexation to cellular internalization and endosomal escape. By variation of the molar ratios of the individual building blocks, the physicochemical properties of the polymers and polyplexes were fine-tuned to reduce toxicity as well as to increase activity of the polyplexes. To further enhance transfection efficiency, a cell-penetrating peptide (CPP)-like functionality was introduced on the polymeric backbone. With the ability to synthesize large libraries of polymers in parallel we also developed a workflow for a mid-to-high throughput screening, focusing first on safety parameters that are accessible by high-throughput approaches such as blood compatibility and toxicity towards host cells and only at a later stage on more laborious tests for the ability to deliver oligonucleotides. To arrive at a better understanding of the molecular basis of activity, furthermore, the effect of the presence of heparan sulfates on the surface of host cells was assessed and the mechanism of cell entry and intracellular trafficking investigated for those polymers that showed a suitable pharmacological profile. Following endocytic uptake, rapid endosomal release occurred. Interestingly, the presence of heparan sulfates on the cell surface had a negative impact on the activity of those polyplexes that were sensitive to decomplexation by heparin in solution. In summary, the screening approach identified two polymers, which form polyplexes with high stability and transfection capacity exceeding the one of poly(ethylene imine) also in the presence of serum.
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Schubert S, Wellnhofer E, Peters B, Kanaan M, Berger F. Early Detection of Cardiac Allograft Vasculopathy (CAV) With Optical Coherence Tomography (OCT) in Pediatric Heart Transplant Recipients - Comparison to Angiographic Assessment. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kanaan M, Ewert P, Berger F, Assa S, Schubert S. Follow-up of patients with interventional closure of ventricular septal defects with Amplatzer Duct Occluder II. Pediatr Cardiol 2015; 36:379-85. [PMID: 25179462 DOI: 10.1007/s00246-014-1017-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 08/22/2014] [Indexed: 10/24/2022]
Abstract
Nonsurgical closure of congenital ventricular septal defects (VSD) has become increasingly acceptable with the availability of different occlusion systems. Transcatheter device treatment is used for perimembranous and muscular defects. Atrio-ventricular block remains the most troublesome complication of device closure. The aim of this study was to describe our experience with closure of VSD using the Amplatzer Duct Occluder II (ADO II) as an "off-label" approach in children and adults. Between 2004 and 2012 transcatheter closure of 31 VSD (20 perimembranous, 10 muscular VSD and 1 ruptured sinus valsalva) with ADO II was undertaken in patients between 3 months and 55 years of age and with a body weight ranging from 4 to 105 kg in our institution. In 29 of 31 procedures, the defect was successfully closed (93.5%) without any significant complications. No increase of aortic or tricuspid valve regurgitation was found in any after procedure. Small residual shunts were observed immediately after the device implantation, but disappeared during a median follow-up period of 38 months (0.4-63) in 27 of 31 patients. There was no incidence of AV block or other conductance abnormalities during implantation or follow-up. The ADO II device is safe and effective for transcatheter VSD closure, but this is still an "off-label" use. After long-term follow-up in a large number of patients this device may be approved for VSD closure in the future.
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Almagro-Molto M, Eder W, Schubert S. Bordetella trematum in chronic ulcers: report on two cases and review of the literature. Infection 2015; 43:489-94. [DOI: 10.1007/s15010-014-0717-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 12/24/2014] [Indexed: 11/30/2022]
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Lehmann J, Schubert S, Schäfer A, Laspe P, Haenssle HA, Ohlenbusch A, Gratchev A, Emmert S. A novel mutation in the XPA gene results in two truncated protein variants and leads to a severe XP/neurological symptoms phenotype. J Eur Acad Dermatol Venereol 2014; 29:2479-82. [PMID: 25393472 DOI: 10.1111/jdv.12841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 10/13/2014] [Indexed: 12/16/2022]
Abstract
BACKGROUND The nucleotide excision repair (NER) pathway repairs UV-induced DNA lesions in an accurate fashion and prevents UV-irradiated areas of the skin from tumour formation. The XPA protein plays a major role in DNA damage demarcation as well as stabilization of other NER factors and was found to be defective in xeroderma pigmentosum (XP) complementation group A patients. OBJECTIVE Characterization of four new XP-A patients. METHODS Genomic and cDNA sequencing, post-UV cell survival of living cells, host-cell reactivation of patients' fibroblasts and Western blotting. RESULTS One of the four investigated patients shows a novel mutation leading to two different truncated protein variants. Three patients contain the already described p.R228X mutation. All patient cell lines exhibit a strong UVC sensitivity and reduced NER capability. In most of the cases stable protein expression was detected. CONCLUSION We discovered four new XP-A patients and a novel XPA mutation resulting in two diverse patient alleles.
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Steinz K, Schubert S, Harder J, Gerdes S, Mrowietz U, Gläser R. Bacterial soft tissue infection in psoriasis despite induction of epidermal antimicrobial peptides. Exp Dermatol 2014; 23:862-4. [DOI: 10.1111/exd.12538] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2014] [Indexed: 12/20/2022]
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Kanaan M, Peters B, Assa S, Berger F, Schubert S. Effektivität und Sicherheit der perkutanen Angioplastie mittels "cutting“-Ballon bei Pat. mit angeborenen Herzfeh-lern. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1394071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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