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Conceptual Design of a Counter‐Current Crystallization Process. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Fractionation of Lignin: Refining Organosolv Lignin for Valuable Bio‐Based Products. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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[Future of acute inpatient rheumatology in Germany : Statement of the Boards of the German Society for Rheumatology and the Association of Rheumatological Acute Clinics on hospital planning North-Rhine/Westphalia 2019 for the discipline rheumatology]. Z Rheumatol 2020; 80:103-106. [PMID: 33313964 PMCID: PMC7872996 DOI: 10.1007/s00393-020-00939-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2020] [Indexed: 12/03/2022]
Abstract
Im September 2019 wurde vom Ministerium für Arbeit, Gesundheit und Soziales (MAGS) in NRW ein Gutachten zur Krankenhausplanung veröffentlicht. Hierin wurde eine grundlegende Reform der Krankenhausplanung empfohlen, indem zukünftig eine Bedarfsplanung auf der Grundlage einer detaillierten Ausweisung von Leistungsbereichen und Leistungsgruppen erfolgen soll. Nach Aufforderung durch das MAGS NRW hat auch die Deutsche Gesellschaft für Rheumatologie (DGRh) mit Unterstützung des Verbandes Rheumatologischer Akutkliniken (VRA) hierzu Stellung genommen.
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Bildoptische Inline‐Erfassung von Kristallgrößen mit einer telezentrischen Durchlichtsonde im Schattenwurfprinzip. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Predictors of fatigue and severe fatigue in a large international cohort of patients with systemic lupus erythematosus and a systematic review of the literature. Rheumatology (Oxford) 2020; 58:987-996. [PMID: 30597077 DOI: 10.1093/rheumatology/key398] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/01/2018] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Fatigue is reported in up to 90% of patients with SLE. This study was conducted to identify the determinants associated with fatigue in a large cohort of patients with SLE, as well as to provide a systematic review of the literature. METHODS Patients from the Lupus BioBank of the upper Rhein, a large German-French cohort of SLE patients, were included in the FATILUP study if they fulfilled the 1997 ACR criteria for SLE and had Fatigue Scale for Motor and Cognitive Functions scores collected. Multivariate logistic regression analyses were performed to assess the determinants of fatigue and severe fatigue. RESULTS A total of 570 patients were included (89.1% female). The median age was 42 years (interquartile range 25-75: 34-52). The median value of the SAfety of Estrogens in Lupus Erythematosus National Assessment (SELENA)-SLEDAI was 2 (0-4). Fatigue was reported by 386 patients (67.7%) and severe fatigue by 209 (36.7%). In multivariate analyses, fatigue was associated with depression [odds ratio (OR): 4.72 (95% CI: 1.39-16.05), P = 0.01], anxiety [OR: 4.49 (95% CI: 2.60-7.77), P < 0.0001], glucocorticoid treatment [OR: 1.59 (95% CI 1.05-2.41), P = 0.04], SELENA-SLEDAI scores [OR: 1.05 (95% CI: 1.00-1.12) per 1 point increase, P = 0.043] and age at sampling [OR: 1.01 (95% CI: 1.00-1.03) per 1 year increase, P = 0.03]. Severe fatigue was independently associated with anxiety (P < 0.0001), depression (P < 0.0001), glucocorticoid treatment (P = 0.047) and age at sampling (P = 0.03). CONCLUSION Both fatigue and severe fatigue are common symptoms in SLE, and are strongly associated with depression and anxiety. Disease activity and the use of glucocorticoids were also independently associated with fatigue, although more weakly.
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Collective dynamics of strain-coupled nanomechanical pillar resonators. Nat Commun 2019; 10:5246. [PMID: 31748570 PMCID: PMC6868224 DOI: 10.1038/s41467-019-13309-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 10/30/2019] [Indexed: 11/09/2022] Open
Abstract
Semiconductur nano- and micropillars represent a promising platform for hybrid nanodevices. Their ability to couple to a broad variety of nanomechanical, acoustic, charge, spin, excitonic, polaritonic, or electromagnetic excitations is utilized in fields as diverse as force sensing or optoelectronics. In order to fully exploit the potential of these versatile systems e.g. for metamaterials, synchronization or topologically protected devices an intrinsic coupling mechanism between individual pillars needs to be established. This can be accomplished by taking advantage of the strain field induced by the flexural modes of the pillars. Here, we demonstrate strain-induced, strong coupling between two adjacent nanomechanical pillar resonators. Both mode hybridization and the formation of an avoided level crossing in the response of the nanopillar pair are experimentally observed. The described coupling mechanism is readily scalable, enabling hybrid nanomechanical resonator networks for the investigation of a broad range of collective dynamical phenomena.
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Abstract
Living cells interact with their immediate environment by exerting mechanical forces, which regulate important cell functions. Elucidation of such force patterns yields deep insights into the physics of life. Here we present a top-down nanostructured, ultraflexible nanowire array biosensor capable of probing cell-induced forces. Its universal building block, an inverted conical semiconductor nanowire, greatly enhances both the functionality and the sensitivity of the device. In contrast to existing cellular force sensing architectures, microscopy is performed on the nanowire heads while cells deflecting the nanowires are confined within the array. This separation between the optical path and the cells under investigation excludes optical distortions caused by cell-induced refraction, which can give rise to feigned displacements on the 100 nm scale. The undistorted nanowire displacements are converted into cellular forces via the nanowire spring constant. The resulting distortion-free cellular force transducer realizes a high-resolution and label-free biosenor based on optical microscopy. Its performance is demonstrated in a proof-of-principle experiment with living Dictyostelium discoideum cells migrating through the nanowire array. Cell-induced forces are probed with a resolution of 50 piconewton, while the most flexible nanowires promise to enter the 100 femtonewton realm.
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Étude descriptive de la cohorte franco–allemande LBBR de patients ayant un lupus erythémateux systémique. Rev Med Interne 2017. [DOI: 10.1016/j.revmed.2017.10.368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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519 Phase I/IIa clinical trial for recessive dystrophic epidermolysis bullosa using genetically corrected autologous keratinocytes. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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EP-1107: Treatment Strategies for local and distant recurrence after HFSRT of the Resection Cavity. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31543-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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PO-0652: SFRT of the resection cavity in patients with one to three brain metastases. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)31902-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Crystallization of Artemisinin from Chromatography Fractions of Artemisia annua Extract. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.5b00399] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Non-rodent species selection for toxicity studies in the field of neuroscience: Is the dog more sensitive than the non-human primate? Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.962] [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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Effizienzsteigerung von komplexen Prozessen in der chemischen Industrie durch anlagenweites Retrofit. CHEM-ING-TECH 2015. [DOI: 10.1002/cite.201550015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kollagenosen. Dtsch Med Wochenschr 2014; 139:711-3. [DOI: 10.1055/s-0034-1369824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Innenohrschwerhörigkeit und Gleichgewichtsstörungen. AKTUEL RHEUMATOL 2013. [DOI: 10.1055/s-0033-1347172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hybrid Process with Crystallization for High Separation Efficiency. CHEM-ING-TECH 2012. [DOI: 10.1002/cite.201250300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Comparison of platelet-rich plasma and VEGF-transfected mesenchymal stem cells on vascularization and bone formation in a critical-size bone defect. Cells Tissues Organs 2012; 196:523-33. [PMID: 22796828 DOI: 10.1159/000337490] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2012] [Indexed: 12/27/2022] Open
Abstract
Both platelet-rich plasma (PRP) and vascular endothelial growth factor (VEGF) can promote regeneration. The aim of this study was to compare the effects of these two elements on bone formation and vascularization in combination with bone marrow stromal cells (BMSC) in a critical-size bone defect in rabbits. The critical-size defects of the radius were filled with: (1) a calcium-deficient hydroxyapatite (CDHA) scaffold + phVEGF(165)-transfected BMSC (VEGF group), (2) CDHA and PRP, or (3) CDHA, autogenous BMSC, and PRP. As controls served: (4) the CDHA scaffold alone and (5) the CDHA scaffold and autogenous BMSC. The volume of new bone was measured by means of micro-CT scans, and vascularization was assessed in histology after 16 weeks. Bone formation was higher in the PRP + CDHA, BMSC + CDHA, and PRP + BMSC + CDHA groups than in the VEGF group (p < 0.05). VEGF transfection significantly promoted vascularization of the scaffolds in contrast to BMSC and PRP (p < 0.05), but was similar to the result of the CDHA + PRP + BMSC group. The results show that VEGF-transfected BMSC as well as the combination of PRP and BMSC improve vascularization, but bone healing was better with the combination of BMSC and PRP than with VEGF-transfected BMSC. Expression of VEGF in BMSC as a single growth factor does not seem to be as effective for bone formation as expanded BMSC alone or PRP which contains a mixture of growth factors.
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Equilibrium Model of a Continuous Crystallization Process for Separation of Substances Exhibiting Solid Solutions. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201200002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Enantioselective Crystallization Exploiting the Shift of Eutectic Compositions in Solid-Liquid Phase Diagrams. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201100689] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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On mixed crystals of chiral organic substances. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311081116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Repeated intrauterine IgG infusions in foetal alloimmune thrombocytopenia do not increase foetal platelet counts. Vox Sang 2011; 99:348-53. [PMID: 20624268 DOI: 10.1111/j.1423-0410.2010.01367.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVES Foetal alloimmune thrombocytopenia (FNAIT) is often treated transplacentally with maternally administered i.v. immunoglobulins, but not all foetuses show a consistent platelet increase during such treatment. MATERIALS AND METHODS We retrospectively analysed data from a cohort of ten foetuses with FNAIT treated by direct foetal immunoglobulin infusion. Foetal treatment was begun between 17 and 25 weeks and continued until 36 weeks with weekly cordocenteses and foetal immunoglobulin infusions. RESULTS While foetal IgG levels increased steadily during weekly IgG infusions, foetal platelet counts remained unchanged. CONCLUSION Our retrospective study presents a unique analysis of a historical cohort, contributing to the ongoing debate about the treatment of choice for foetal alloimmune thrombocytopenia.
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Application of a recent FBRM-probe model to quantify preferential crystallization of dl-threonine. Chem Eng Res Des 2010. [DOI: 10.1016/j.cherd.2010.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Integrierter Prozess zur Trennung chiraler Systeme mit Verbindungsbildung. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201050380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Clinical Relevance
In dental bleaching, the micromorphological alterations of hard tissues have been well investigated, but little is known about the optical changes involved. The results of the current study showed that enamel, irrespective of maturation, is subjected to a shift in reflectance towards blue within the color space and enhanced reflection. This effect was demonstrated in different bleaching agent concentrations and protocols.
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Estimation of Reliable Parameters for Solid-Liquid Equilibrium Description of Chiral Systems. Chem Eng Technol 2010. [DOI: 10.1002/ceat.200900612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Retrospective comparison of maternal vs. HPA-matched donor platelets for treatment of fetal alloimmune thrombocytopenia. Vox Sang 2010; 98:423-30. [DOI: 10.1111/j.1423-0410.2009.01268.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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Kombination von Biokatalyse und Kristallisation zur Darstellung enantiomerenreiner Mandelsäurederivate. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.200900157] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Alternatives Verfahren zur Racemattrennung verbindungsbildender Systeme mittels Kristallisation. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200900080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kombination von Biokatalyse und Kristallisation zur Darstellung enantiomerenreiner Verbindungen. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Modellierung und Vergleich von polythermen autoseeded Prozessvarianten der Bevorzugten Kristallisation. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200800170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Parameterization of population balance models for polythermal auto seeded preferential crystallization of enantiomers. Chem Eng Sci 2009. [DOI: 10.1016/j.ces.2008.05.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Modified and unmodified multiwalled carbon nanotubes in high performance solution-styrene–butadiene and butadiene rubber blends. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.09.031] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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38
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Zukünftiger Einsatz von Wirkstoffen gegen TNF-Alpha. AKTUEL RHEUMATOL 2008. [DOI: 10.1055/s-2008-1043513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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VEGF producing bone marrow stromal cells (BMSC) enhance vascularization and resorption of a natural coral bone substitute. Bone 2007; 41:516-22. [PMID: 17693148 DOI: 10.1016/j.bone.2007.06.018] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 06/19/2007] [Accepted: 06/26/2007] [Indexed: 10/23/2022]
Abstract
Bone graft substitutes often exhibit poor bone regeneration in large defects because of inadequate vascularization. Studies have shown that if blood supply is compromised, application of osteogenic factors alone could not induce successful healing. This study was to evaluate the effects of vascular endothelial growth factor, which combined with a coralline scaffold, on vascularization, scaffold resorption and osteogenesis in a rabbit radius critical size defect model. The scaffold was either coated with a control-plasmid DNA (group 1), coated with VEGF-plasmid DNA (group 2), loaded with mesenchymal stem cells (BMSC) transfected with control plasmid (group 3) or with both stem cells and the VEGF plasmid (group 4). X-rays were taken every 4 weeks up to week 16, when animals were euthanized. The volume of new bone was measured by mu-CT scans and blood vessels were counted after anti-CD31 staining of endothelial cells. The results from the solitary VEGF- and VEGF-transfected cells (groups 2 and 4) demonstrated significantly enhanced vascularization, osteogenesis and resorption of the carrier when compared to the control group. The highest degree of osteogenesis was found when the carrier was loaded with BMSC (group 3), whereas VEGF-transfected cells led to the highest vascularization and fastest resorption of the bone substitute. Additionally, VEGF-transfected BMSC led to a more homogenous vascularization of the defect. The results indicate that VEGF can be a helpful factor to improve healing in large bone defects, in which bone substitutes will otherwise not be vascularized and replaced by fresh bone.
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Influence of argatroban on coagulation parameters in heparin-induced thrombocytopenia patients after cardiothoracic surgery. J Thromb Haemost 2007; 5:1982-4. [PMID: 17723141 DOI: 10.1111/j.1538-7836.2007.02662.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Einfluss der Prozessführungsstrategie auf Produktivität und Produkteigenschaften einer „Bevorzugten Kristallisation”. CHEM-ING-TECH 2007. [DOI: 10.1002/cite.200600132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Conceptual Design and Feasibility Study of Combining Continuous Chromatography and Crystallization for Stereoisomer Separations. Chem Eng Res Des 2007. [DOI: 10.1205/cherd06224] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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[Current therapeutic strategy for rheumatoid arthritis]. MMW Fortschr Med 2006; 148:38-42; quiz 43. [PMID: 17621798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The success of the treatment of rheumatoid arthritis depends primarily on early diagnosis. In most cases, basic therapy begins with methotrexate. Depending on the stage and course of the disease (radiographically detected early erosion and/or progression), basic immunosuppressive therapy can be combined or supplemented with cytokine antagonists. Furthermore, for specific indications, several alternative active substances (DMARD monotherapies) are available. Today the goal of therapy is always remission.
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Ermittlung relevanter Wachstumsparameter für die Racemattrennung am Beispiel des verbindungsbildenden Systems Mandelsäure/Wasser. CHEM-ING-TECH 2006. [DOI: 10.1002/cite.200650067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Alternative Einsatzmöglichkeiten der „Bevorzugten Kristallisation” zur Enantiomerentrennung. CHEM-ING-TECH 2006. [DOI: 10.1002/cite.200500192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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[Controlled distraction as a therapeutic option in moderate degeneration of the intervertebral disc -- an in vivo study in the rabbit-spine model]. ACTA ACUST UNITED AC 2006; 144:68-73. [PMID: 16498563 DOI: 10.1055/s-2005-836571] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIM The aim of this study was to investigate the effects of temporary distraction on a degenerated intervertebral disc to characterize regenerative changes associated with disc distraction. METHOD New Zealand white rabbits (n = 32) were used for this experimental animal study. The rabbits were randomly assigned to one of five groups. 6 animals were loaded for 28 days using a custom-made external loading device to stimulate disc degeneration (G2). In 6 animals the discs were first loaded for 28 days and after 28 days loading time the discs in six animals were treated as dynamic distraction with an external distraction device (G1). In six animals the discs were distracted for 28 days without previous loading (G5) and in six animals the discs were loaded for 28 days and afterwards the loading device was removed for 28 days for recovery without distraction (G3). Six animals were sham operated (G4) without application of axial load. After 28 to 56 days loading and distraction time, the animals were sacrificed and the lumbar spine was harvested for histological and radiographic analysis. Histology was performed according to a degeneration score and disc height was calculated radiographically. For the cell viability examination, the number of apoptotic cells was determined. RESULTS After 28 days of loading (G2), the discs showed a significant decrease in disc space of the treated segment. Histologically, a disorganization of the architecture of the annulus occurred. The number of dead cells increased significantly in the annulus and cartilage endplate. These changes were reversible after 28 days of distraction (G1). The disc thickness increased significantly to physiological levels as compared to the specimens from the 28 days loading group without distraction. Histologically, the discs showed signs of tissue regeneration after 28 days of distraction (G1). The number of apoptotic cells decreased significantly in comparison to the loaded discs without distraction (G2). CONCLUSION The results of this study suggest that disc regeneration can be induced by axial dynamic distraction in the moderately degenerated rabbit intervertebral disc. The decompressed rabbit intervertebral discs showed signs of tissue recovery at the cellular and histological levels after temporary disc distraction.
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Partial Miscibility of Organic Compounds in the Solid State – The Case of Two Epimers of a Diastereoisomer. Chem Eng Technol 2006. [DOI: 10.1002/ceat.200500359] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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O.103 Combination therapy with antiviral drugs and immunomodulation against chronic hepatitis B virus infection: Evaluation in the woodchuk model. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80099-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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P.060 Acute infection of woodchucks with californian and arctic ground squirrel hepatitis virus. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80243-x] [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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