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Abstract
Spondylolisthesis is a frequent disease that is found in 20% of the adult population and is particularly accompanied by lumbar back pain. Degenerative spondylolisthesis develops in adulthood and is most often found in the L4/5 segment, in contrast to nondegenerative spondylolisthesis which is most often situated in the L5/S1 segment. Prior to every treatment the heterogeneous disease pattern has to be classified according to the severity grade of the olisthesis and to the Spinal Deformity Study Group (SDSG) classification. High-grade spondylolisthesis should preferably be surgically treated and low-grade spondylolisthesis should preferably be treated conservatively. In approximately 50% of all recently acquired spondylolistheses healing of the lysis can be achieved by a consequently carried out conservative treatment.
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Affiliation(s)
- M R Konieczny
- Klinik für Wirbelsäulenchirurgie, Orthopädische Klinik Volmarstein, Lothar-Gau-Str. 11, 58300, Wetter (Ruhr), Deutschland.
| | - M Jäger
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
- Klinik für Orthopädie, Unfall- & Wiederherstellungschirurgie, St. Marien Hospital Mülheim a. d. Ruhr, Mühlheim a. d. Ruhr, Deutschland
- Klinik für Orthopädie, Unfall- & Wiederherstellungschirurgie, Katholisches Klinikum Essen Philippus, Essen, Deutschland
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2
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Kleine A, Schubert US, Jäger M. Exploiting Orthogonal C-C Cross-Coupling Reactions for Chemistry-on-the-Complex: Modular Assembly of 2,6-Di(quinolin-8-yl)pyridine Ruthenium(II) Photosensitizer Triads. Inorg Chem 2024; 63:4053-4062. [PMID: 38373324 PMCID: PMC10915800 DOI: 10.1021/acs.inorgchem.3c03380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/12/2024] [Accepted: 01/17/2024] [Indexed: 02/21/2024]
Abstract
In this work, we present a concise modular assembly strategy using one universal heteroleptic 2,6-di(quinolin-8-yl)pyridine-based ruthenium(II) complex as a starting building block. Extending the concept from established ligand modifications and subsequent complexation (classical route), the later appearing chemistry-on-the-complex methodology was used for late-stage syntheses, i.e., assembling discrete building blocks to molecular architectures (here: dyad and triads). We focused on Suzuki-Miyaura and Sonogashira cross-couplings as two of the best-known C-C bond forming reactions. Both were performed on one building block complex bearing a bromine and TIPS-protected alkyne for functional group interconversion (bromine to TMS-protected alkyne, a benzyl azide, or a boronic acid pinacol ester moiety with ≥95% isolated yield and simple purification) as well as building block assemblies using both a triarylamine-based donor and a naphthalene diimide-based acceptor in up to 86% isolated yield. Additionally, the developed purification via automated flash chromatography is simple compared to tedious manual chromatography for ruthenium(II)-based substrates in the classical route. Based on the preliminary characterization by steady-state spectroscopy, the observed emission quenching in the triad (55%) serves as an entry to rationally optimize the modular units via chemistry-on-the-complex to elucidate energy and electron transfer.
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Affiliation(s)
- Alexander Kleine
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Michael Jäger
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
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3
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Konieczny MR, Jäger M. [Spondylolisthesis]. Orthopadie (Heidelb) 2023; 52:931-940. [PMID: 37792012 DOI: 10.1007/s00132-023-04443-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/28/2023] [Indexed: 10/05/2023]
Abstract
Spondylolisthesis is a frequent disease that is found in 20% of the adult population and is particularly accompanied by lumbar back pain. Degenerative spondylolisthesis develops in adulthood and is most often found in the L4/5 segment, in contrast to nondegenerative spondylolisthesis which is most often situated in the L5/S1 segment. Prior to every treatment the heterogeneous disease pattern has to be classified according to the severity grade of the olisthesis and to the Spinal Deformity Study Group (SDSG) classification. High-grade spondylolisthesis should preferably be surgically treated and low-grade spondylolisthesis should preferably be treated conservatively. In approximately 50% of all recently acquired spondylolistheses healing of the lysis can be achieved by a consequently carried out conservative treatment.
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Affiliation(s)
- M R Konieczny
- Klinik für Wirbelsäulenchirurgie, Orthopädische Klinik Volmarstein, Lothar-Gau-Str. 11, 58300, Wetter (Ruhr), Deutschland.
| | - M Jäger
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
- Klinik für Orthopädie, Unfall- & Wiederherstellungschirurgie, St. Marien Hospital Mülheim a. d. Ruhr, Mühlheim a. d. Ruhr, Deutschland
- Klinik für Orthopädie, Unfall- & Wiederherstellungschirurgie, Katholisches Klinikum Essen Philippus, Essen, Deutschland
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Jäger M, Diem G, Sahanic S, Fux V, Griesmacher A, Lass-Flörl C, Wilflingseder D, Tancevski I, Posch W. Immunity of Heterologously and Homologously Boosted or Convalescent Individuals Against Omicron BA.1, BA.2, and BA.4/5 Variants. J Infect Dis 2023; 228:160-168. [PMID: 36869832 PMCID: PMC10345468 DOI: 10.1093/infdis/jiad057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 03/05/2023] Open
Abstract
BACKGROUND The emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variants BA.1, BA.2, and BA.4/5 demonstrate higher transmission and infection rates than previous variants of concern. To evaluate effectiveness of heterologous and homologous booster vaccination, we directly compared cellular and humoral immune responses as well as neutralizing capacity against replication-competent SARS-CoV-2 wild type, Delta, and Omicron variants BA.1, BA.2, and BA.4/5. METHODS Peripheral blood mononuclear cells and serum samples from 137 participants were investigated, in 3 major groups. Individuals in the first group were vaccinated twice with ChAdOx1 and boosted with a messenger RNA (mRNA) vaccine (BNT162b2 or mRNA-1273); the second group included triple mRNA--vaccinated participants, and the third group, twice-vaccinated and convalescent individuals. RESULTS Vaccination and convalescence resulted in the highest SARS-CoV-2-specific antibody levels, stronger T-cell responses, and best neutralization against wild type, Delta Omicron BA.2, and BA.4/5, while a combination of ChAdOx1 and BNT162b2 vaccination elevated neutralizing capacity against Omicron BA.1. In addition, heterologous booster regimens, compared with homologous regimens, showed higher efficacy against Omicron BA.2 as well as BA.4/5. CONCLUSIONS We showed that twice-vaccinated and convalescent individuals demonstrated the strongest immunity against Omicron BA.2 and BA.4/5 variant, followed by those receiving heterologous and homologous booster vaccine regimens.
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Affiliation(s)
- Michael Jäger
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Gabriel Diem
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Sabina Sahanic
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | - Vilmos Fux
- Central Institute for Medical and Chemical Laboratory Diagnosis, Innsbruck University Hospital, Innsbruck, Austria
| | - Andrea Griesmacher
- Central Institute for Medical and Chemical Laboratory Diagnosis, Innsbruck University Hospital, Innsbruck, Austria
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Ivan Tancevski
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | - Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
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Knell AI, Böhm AK, Jäger M, Kerschbaum J, Engl S, Rudnicki M, Buchwinkler L, Bellmann-Weiler R, Posch W, Weiss G. Virus-Subtype-Specific Cellular and Humoral Immune Response to a COVID-19 mRNA Vaccine in Chronic Kidney Disease Patients and Renal Transplant Recipients. Microorganisms 2023; 11:1756. [PMID: 37512928 PMCID: PMC10383116 DOI: 10.3390/microorganisms11071756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/06/2023] [Revised: 06/28/2023] [Accepted: 06/29/2023] [Indexed: 07/30/2023] Open
Abstract
Patients with chronic kidney disease (CKD) or immunosuppression are at increased risk of severe SARS-CoV-2 infection. The vaccination of CKD patients has resulted in lower antibody concentrations and possibly reduced protection. However, little information is available on how T-cell-mediated immune response is affected in those patients and how vaccine-induced immune responses can neutralise different SARS-CoV-2 variants. Herein, we studied virus-specific humoral and cellular immune responses after two doses of mRNA-1273 (Moderna) vaccine in 42 patients suffering from CKD, small vessel vasculitis (maintenance phase), or kidney transplant recipients (KT). Serum and PBMCs from baseline and at three months after vaccination were used to determine SARS-CoV-2 S1-specific antibodies, neutralisation titers against SARS-CoV-2 WT, B1.617.2 (delta), and BA.1 (omicron) variants as well as virus-specific T-cells via IFNγ ELISpot assays. We observed a significant increase in quantitative and neutralising antibody titers against SARS-CoV-2 and significantly increased T-cell responses to SARS-CoV-2 S1 antigen after vaccination only in the CKD patients. In patients with vasculitis, neither humoral nor cellular responses were detected. In KT recipients, antibodies and virus neutralisation against WT and delta, but not against omicron BA.1, was assured. Importantly, we found no specific SARS-CoV-2 T-cell response in vasculitis and KT subjects, although unspecific T-cell activation was evident in most patients even before vaccination. While pre-dialysis CKD patients appear to mount an effective immune response for in vitro neutralisation of SARS-CoV-2, KT and vasculitis patients under immunosuppressive therapy were insufficiently protected from SARS-CoV-2 two months after the second dose of an mRNA vaccine.
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Affiliation(s)
- Astrid I Knell
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Pneumology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Anna K Böhm
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Pneumology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Michael Jäger
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstraße 41, 6020 Innsbruck, Austria
| | - Julia Kerschbaum
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Sabine Engl
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Pneumology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Michael Rudnicki
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Lukas Buchwinkler
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Rosa Bellmann-Weiler
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Pneumology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstraße 41, 6020 Innsbruck, Austria
| | - Günter Weiss
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Pneumology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
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Diem G, Jäger M, Dichtl S, Bauer A, Lass-Flörl C, Reindl M, Wilflingseder D, Posch W. Vaccination and Omicron BA.1/BA.2 Convalescence Enhance Systemic but Not Mucosal Immunity against BA.4/5. Microbiol Spectr 2023; 11:e0516322. [PMID: 37098903 PMCID: PMC10269517 DOI: 10.1128/spectrum.05163-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 04/06/2023] [Indexed: 04/27/2023] Open
Abstract
Rising breakthrough infections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron BA.4/5 led to the performance of various studies investigating systemic immunity and neutralizing antibodies in sera, but mucosal immunity remains understudied. In this cohort study, the humoral immune responses, including immunoglobulin levels and the presence of virus-neutralizing antibodies, of 92 vaccinated and/or BA.1/BA.2 convalescent individuals were investigated. Cohorts received two doses of ChAdOx1, BNT162b2, or mRNA-1273 and subsequent booster vaccination with either BNT162b2 or mRNA-1273, following BA.1/BA.2 infection. In addition, vaccinated and nonconvalescent or unvaccinated and BA.1 convalescent individuals were studied. Serum and saliva samples were used to determine SARS-CoV-2 spike-specific IgG and IgA titers and neutralizing activity against replication-competent SARS-CoV-2 wild-type virus and the Omicron BA.4/5 variant. Vaccinated/convalescent cohorts demonstrated strongest neutralization against BA.4/5, with 50% neutralization titer (NT50) values reaching 174.2; however, neutralization was reduced up to 11-fold, compared to wild-type virus. Both BA.1 convalescent and vaccinated nonconvalescent cohorts displayed the weakest neutralization against BA.4/5, with NT50 values being reduced to 4.6, accompanied by lower numbers of positive neutralizers. Additionally, salivary neutralization against wild-type virus was strongest in vaccinated and BA.2 convalescent subjects, but this elevated neutralization efficiency was lost when challenged with BA.4/5. Our data support the contention that current coronavirus disease 2019 (COVID-19) vaccines efficiently induce humoral immunity. However, antiviral effectiveness in serum and saliva is greatly reduced against novel variants of concern. These results suggest an adjustment of current vaccine strategies to an adapted or alternative vaccine delivery, such as mucosal booster vaccinations, which might establish enhanced or even sterilizing immunity against novel SARS-CoV-2 variants. IMPORTANCE Rising incidences of breakthrough infections caused by SARS-CoV-2 Omicron BA.4/5 have been observed. Although various studies were conducted investigating neutralizing antibodies in sera, mucosal immunity was barely evaluated. Here, we investigated mucosal immunity, since the presence of neutralizing antibodies at mucosal entry sites plays a fundamental role in disease limitation. We found strong induction of serum IgG/IgA, salivary IgA, and neutralization against SARS-CoV-2 wild-type virus in vaccinated/convalescent subjects but detected 10-fold reduced (albeit positive) serum neutralization against BA.4/5. Interestingly, vaccinated and BA.2 convalescent patients demonstrated the greatest serum neutralization against BA.4/5, but this advantageous neutralizing effect was not observed in the saliva. Our data support the contention that current COVID-19 vaccines are very efficient against severe/critical disease progression. Moreover, these results suggest an adjustment of the current vaccine strategy to adapted and alternative vaccine delivery, such as mucosal booster vaccinations, to establish robust sterilizing immunity against novel SARS-CoV-2 variants.
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Affiliation(s)
- Gabriel Diem
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Michael Jäger
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefanie Dichtl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Angelika Bauer
- Clinical Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Markus Reindl
- Clinical Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
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Dichtl S, Diem G, Jäger M, Zaderer V, Lupoli G, Dächert C, Muenchhoff M, Graf A, Blum H, Keppler OT, Lass-Flörl C, Weiss G, Wilflingseder D, Posch W. Antiviral drugs block replication of highly immune-evasive Omicron subvariants ex vivo, but fail to reduce tissue inflammation. Antiviral Res 2023; 213:105581. [PMID: 36965526 PMCID: PMC10033493 DOI: 10.1016/j.antiviral.2023.105581] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 02/20/2023] [Accepted: 03/15/2023] [Indexed: 03/25/2023]
Abstract
The identification of the SARS-CoV-2 Omicron variants BA.4/BA.5, BF.7 and BQ.1.1 immediately raised concerns regarding the efficacy of currently used monoclonal antibody therapies. Here we examined the activity of monoclonal antibody therapies and antiviral drugs against clinical specimens for SARS-CoV-2 Omicron BA.4/BA.5, BF.7 and BQ.1.1 employing an immunofluorescence neutralization assay. Further we explored treatment of BA.4/BA.5 infections with efficient antiviral drugs and monoclonal antibodies in a 3D model of primary human bronchial epithelial cells. We found that the antiviral drugs Molnupiravir, Nirmatrelvir and Remdesivir efficiently inhibit BA.4/BA.5, BF.7 and BQ.1.1 replication. In contrast, only the monoclonal antibody Cilgavimab exerted an inhibitory effect, while Tixagevimab, Regdanvimab and Sotrovimab lost their efficacy against BA.4/BA.5. We found that only the prophylactic treatment with Cilgavimab impacted on tissue inflammation by reducing intracellular complement component 3 (C3) activation following BA.4/BA.5 infection in primary human airway epithelial grown in air-liquid-interphase, which was not the case when using antiviral drugs or Cilgavimab after establishment of infection. Of note, all tested monoclonal antibodies had no neutralizing activity during infection by BF.7 and BQ.1.1 variants. Our results suggest that despite a marked reduction of viral replication, potent antiviral drugs fail to reduce tissue levels of inflammatory compounds such as C3, which can still result in tissue destruction.
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Affiliation(s)
- Stefanie Dichtl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Gabriel Diem
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Michael Jäger
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Viktoria Zaderer
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Gaia Lupoli
- Max von Pettenkofer Institute and Gene Center, Virology, LMU München, Munich, Germany
| | - Christopher Dächert
- Max von Pettenkofer Institute and Gene Center, Virology, LMU München, Munich, Germany
| | - Maximilian Muenchhoff
- Max von Pettenkofer Institute and Gene Center, Virology, LMU München, Munich, Germany
| | - Alexander Graf
- Laboratory for Functional Genome Analysis, Gene Center, LMU München, Munich, Germany
| | - Helmut Blum
- Laboratory for Functional Genome Analysis, Gene Center, LMU München, Munich, Germany
| | - Oliver T Keppler
- Max von Pettenkofer Institute and Gene Center, Virology, LMU München, Munich, Germany
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Günter Weiss
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria.
| | - Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria.
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Jäger M, Portegys E, Busch A, Wegner A. [Femoral neck fractures]. Orthopadie (Heidelb) 2023; 52:332-346. [PMID: 36867225 DOI: 10.1007/s00132-023-04364-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/20/2023] [Indexed: 03/04/2023]
Abstract
Femoral neck fractures (FNF) are the most frequent fractures in the older population and are also of high socioeconomic importance due to the high risk of mortality. The diagnostics are based on the clinical examination and imaging procedures. The classification systems used in the routine clinical practice are oriented towards the prognosis and are therefore a valuable aid in making decisions for the selection of the treatment procedure. Early surgery is decisive for the success of treatment. Older patients (> 60 years) with arthritically damaged hips and a high degree of fracture dislocation benefit from prompt hip replacement (bipolar systems, total hip arthroplasty, dual mobility systems). In contrast, joint-preserving surgery by osteosynthesis is indicated in younger patients with a low degree of dislocation. This article summarizes the clinically relevant aspects of FNF and gives an overview of current treatment strategies with inclusion of the scientific literature.
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Affiliation(s)
- M Jäger
- Lehrstuhl für Orthopädie und Unfallchirurgie, University of Duisburg-Essen, Kaiserstr. 50, 45468, Mülheim a. d. R., Deutschland.
- Department of Orthopaedics, Trauma and Reconstructive Surgery, St. Marien Hospital Mülheim a. d. Ruhr, Kaiserstr. 50, 45468, Mülheim a. d. R., Deutschland.
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Katholisches Klinikum Essen Philippus-Stift, Hülsmannstr. 17, 45355, Essen, Deutschland.
| | - E Portegys
- Department of Orthopaedics, Trauma and Reconstructive Surgery, St. Marien Hospital Mülheim a. d. Ruhr, Kaiserstr. 50, 45468, Mülheim a. d. R., Deutschland
| | - A Busch
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, Katholisches Klinikum Essen Philippus-Stift, Hülsmannstr. 17, 45355, Essen, Deutschland
| | - A Wegner
- Lehrstuhl für Orthopädie und Unfallchirurgie, University of Duisburg-Essen, Kaiserstr. 50, 45468, Mülheim a. d. R., Deutschland
- Klinik für Unfallchirurgie, Orthopädie, Handchirurgie, Klinikum Wolfsburg, Sauerbruchstr. 7, 38440, Wolfsburg, Deutschland
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9
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Jäger M, Dichtl S, Bellmann-Weiler R, Reindl M, Lass-Flörl C, Wilflingseder D, Posch W. Serum Neutralization Against SARS-CoV-2 Variants Is Heterogenic and Depends on Vaccination Regimen. J Infect Dis 2023; 227:528-532. [PMID: 36315869 PMCID: PMC9927074 DOI: 10.1093/infdis/jiac432] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/24/2022] [Accepted: 10/28/2022] [Indexed: 11/05/2022] Open
Abstract
Omicron variants are still the dominant SARS-CoV-2 viruses worldwide, therefore determination of the level of protection from infection and severe disease is essential. Here, we investigated humoral and cellular immunity of individuals immunized by ChAdOx1, BNT162b2, and mRNA-1273 and our results show that IgG and neutralization titers wane over time. However, strongest neutralization against Omicron BA.1 and T-cell responses were detected in ChAdOx1 vaccinees 6 months after the second dose, while no long-lasting neutralization was shown against BA.2 in any cohort. Crucially, our investigation revealed that immunity against variants of concern is heterogenic and dependent on the immunization status.
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Affiliation(s)
- Michael Jäger
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefanie Dichtl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Rosa Bellmann-Weiler
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | - Markus Reindl
- Clinical Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
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Beck S, Dittrich F, Busch A, Jäger M, Theysohn JM, Lazik-Palm A, Haubold J. Unloader bracing in osteoarthritis of the knee - Is there a direct effect on the damaged cartilage? Knee 2023; 40:16-23. [PMID: 36403395 DOI: 10.1016/j.knee.2022.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 08/26/2022] [Accepted: 11/03/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND Unloading knee braces represent a conservative treatment option for non-pharmalogical management of unicompartmental osteoarthritis of the knee. Though there is consensus on the clinical effectiveness of unloading, the effect mechanism of bracing remains part of a debate. Our study was designed to assess the effect of unloader bracing on damaged cartilage via MRI cartilage mappings. METHODS Fourteen patients (7 female, 7 male, mean age 43.1 ± 9.4 years) with unicompartmental cartilage wear in knees with varus or valgus malalignment were enrolled. Clinical scores, radiographs and MR-graphic properties (T2/T2* mapping, T1 Delayed Gadolinium Enhanced MRI of the cartilage (dGEMRIC) mapping, high-resolution PDw sequences) of knee cartilage were recorded before and three months after brace use. RESULTS Bracing the knees for a mean of 14.4 ± 2.0 weeks (range 11 to 18 weeks) resulted in significant pain reduction (VAS changed from 5.9 ± 2.0 to 2.0 ± 1.3, p < 0.001) and improvement in knee function (KOOS increased from 42.1 ± 22.7 to 64.8 ± 18.7, p < 0.001). In the affected cartilage regions T2 relaxation times significantly decreased from 56.1 ± 11.4 ms to 46.5 ± 11.2 ms (p < 0.05). No changes in T1-dGEMRIC and T2* relaxation times, thickness or the extent of the damaged cartilage area could be detected. CONCLUSIONS Our results suggest, that unloader bracing improves the biochemical properties of the damaged cartilage by increasing collagen and proteoglycan concentration as well as decreasing the cartilage edema.
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Affiliation(s)
- S Beck
- Sportsclinic Hellersen, Paulmannshoeher Strasse 17, 58515 Luedenscheid, Germany; Department of Orthopedics and Trauma Surgery, University Hospital Essen, University of Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany.
| | - F Dittrich
- Department of Orthopedics and Trauma Surgery, University Hospital Essen, University of Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany; Gelenkzentrum Bergisch Land, Freiheitsstrasse 203, 42853 Remscheid, Germany
| | - A Busch
- Department of Orthopedics and Trauma Surgery, University Hospital Essen, University of Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany; Department of Orthopedics, Trauma and Reconstructive Surgery, St. Marien Hospital Muelheim, Contilia Gruppe, Kaiserstrasse 50, 45468 Muelheim an der Ruhr, Germany
| | - M Jäger
- Department of Orthopedics, Trauma and Reconstructive Surgery, St. Marien Hospital Muelheim, Contilia Gruppe, Kaiserstrasse 50, 45468 Muelheim an der Ruhr, Germany; Chair of Orthopedics and Trauma Surgery, University of Duisburg-Essen, Essen, Germany
| | - J M Theysohn
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - A Lazik-Palm
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - J Haubold
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany.
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Jäger M, Busch A, Sowislok A. Bioactivation of scaffolds in osteonecrosis. Orthopadie (Heidelb) 2022; 51:808-814. [PMID: 36074165 DOI: 10.1007/s00132-022-04303-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Avascular osteonecrosis (AVN) due to local ischemia leads to an inhomogeneous osseous defect, which can be treated by resection and with bone substitute materials in a joint-preserving treatment. Due to the underlying risk profile of AVN, the mostly subchondral localization and the size of the local bone defect, bone regeneration is impaired. Therefore, bioactivation of the applied bone substitute materials prior to application is highly desirable. Apart from the use of growth factors and other soluble substances, the autologous application of location-typical cells and tissue is a useful alternative to support the bone healing properties of scaffolds. This article presents various methods to activate scaffolds for bone stimulation and discusses these techniques with respect to recent data from the literature.
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Affiliation(s)
- M Jäger
- Chair of Orthopaedics and Trauma Surgery, University of Duisburg-Essen, Essen, Germany.
- Department of Orthopaedics, Trauma and Reconstructive Surgery, St. Marien Hospital Mülheim a. d. Ruhr, Kaiserstr. 50, 45468, Mülheim a. d. Ruhr, Germany.
- Department of Orthopaedics, Trauma and Reconstructive Surgery, Katholisches Klinikum Essen Philippus, Essen, Germany.
| | - A Busch
- Department of Orthopaedics, Trauma and Reconstructive Surgery, Katholisches Klinikum Essen Philippus, Essen, Germany
| | - A Sowislok
- Chair of Orthopaedics and Trauma Surgery, University of Duisburg-Essen, Essen, Germany
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Wegner A, Wassenaar D, Busch A, Stanjek M, Mayer C, Jäger M. [Post-traumatic necrosis of the humeral head-Endoprosthesis or joint preservation]. Orthopadie (Heidelb) 2022; 51:822-828. [PMID: 36083347 DOI: 10.1007/s00132-022-04307-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Humerus fractures play a major role in daily clinical routine, and subsequent osteonecrosis is common after osteosyntheses. OBJECTIVES The current paper highlights the incidence and cause of osteonecrosis after proximal humerus fractures, with respect to presentation of anatomy and risk factors. METHODS Display of the literature and therapy options for humerus fracture and subsequent necrosis. RESULTS Humerus fractures are the seventh most frequent fractures in humans. The complication rate is 40%, and the described rate of necrosis is up to 34%. Accordingly, the surgical revision rate is at 19% according to recent literature. CONCLUSION The treatment of humerus head fracture must consider numerous variables. The individual type of fracture and the current individual situation of the patient must be included in the process of choosing the right treatment. Modern implants with screw locking features should be used, and for certain circumstances the direct implantation of a prosthesis should be considered. Thereby the expectations of the patient with respect to the postoperative activity level play a major role.
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Affiliation(s)
- A Wegner
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland.
- Klinik für Unfallchirurgie, Orthopädie und Handchirurgie, Klinikum Wolfsburg, Sauerbruchstr. 7, 38440, Wolfsburg, Deutschland.
| | - D Wassenaar
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim an der Ruhr GmbH, Kaiserstr. 50, 45468, Mülheim/Ruhr, Deutschland
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
| | - A Busch
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim an der Ruhr GmbH, Kaiserstr. 50, 45468, Mülheim/Ruhr, Deutschland
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
| | - M Stanjek
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim an der Ruhr GmbH, Kaiserstr. 50, 45468, Mülheim/Ruhr, Deutschland
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
| | - C Mayer
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim an der Ruhr GmbH, Kaiserstr. 50, 45468, Mülheim/Ruhr, Deutschland
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
| | - M Jäger
- Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim an der Ruhr GmbH, Kaiserstr. 50, 45468, Mülheim/Ruhr, Deutschland
- Lehrstuhl für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Essen, Deutschland
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Moradi M, Staude I, Pertsch T, Jäger M, Schubert US. Acid-base responsive photoluminescence switching of CdSe/ZnS quantum dots coupled to plasmonic gold film using nanometer-thick poly[(2-diethylamino)ethyl methacrylate] layer. Nanoscale 2022; 14:12395-12402. [PMID: 35971983 DOI: 10.1039/d2nr02654f] [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] [Indexed: 06/15/2023]
Abstract
The control of plasmon-nanoemitter interactions at the nanoscale enables the tailored modulation of optical properties, namely, the photoluminescence (PL) intensity of the nanoemitters. In this contribution, using a nanometer-thick poly[(2-diethylamino) ethyl methacrylate] (39 to 74 nm) as pH responsive spacer layer (pKa ∼ 6 to 6.5) between a plasmonic gold film and CdSe/ZnS Quantum Dots (QDs) nanoemitters, we could achieve reversible pH-responsive PL switching in QDs. In fact, the swelling (at pH 5) and shrinking (at pH 11) function of the pH-responsive spacer layer modulates the distance between the QDs and the gold surface, which dictates the plasmonic film-QDs nanoemitter interaction. Notably, we observed a high QDs' PL enhancement of up to a factor of 3.1 ± 0.4 through changing the pH value from 5 to 11. Furthermore, based on a systematic analysis of several samples with different spacer layer thicknesses and multiple pH cycles, our developed system revealed substantial stability, reversibility and PL enhancement reproducibility. Thus, the established acid-base responsive switchable systems may represent an appealing platform for applications such as sensors, biochemical assays, optoelectronics and logic gates and can be easily evolved to other multifunctional switchable systems using alternative stimuli-responsive polymers.
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Affiliation(s)
- Maryam Moradi
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany.
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Isabelle Staude
- Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 3, 07743 Jena, Germany
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str. 15, 07745 Jena, Germany
| | - Thomas Pertsch
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str. 15, 07745 Jena, Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany.
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany.
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
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Jäger M, Sonnleitner ST, Dichtl S, Lafon E, Diem G, Walder G, Lass-Flörl C, Wilflingseder D, Posch W. Immune Responses Against SARS-CoV-2 WT and Delta Variant in Elderly BNT162b2 Vaccinees. Front Immunol 2022; 13:868361. [PMID: 35833113 PMCID: PMC9271971 DOI: 10.3389/fimmu.2022.868361] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/06/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundResidents of nursing homes are one of the most vulnerable groups during the severe acute syndrome coronavirus 2 (SARS-CoV-2) pandemic. The aim of this study was to characterize cellular and humoral immune responses in >70-year-old participants before vaccination, after first and second vaccination with BNT162b2, in contrast to second-dose-vaccinated participants younger than 60 years.MethodsPeripheral blood mononuclear cells of 45 elderly and 40 younger vaccinees were analyzed by IFNγ ELISpot, specific immunoglobulin G antibody titers against SARS-CoV-2 spike protein, and neutralization abilities against SARS-CoV-2 wild-type (WT) and Delta variant (B.1.617.2).ResultsOur results clearly demonstrate a significantly increased T cell response, IgG titers, and neutralization activities against SARS-CoV-2 WT and Delta between first and second vaccination with BNT162b2 in elderly vaccinees, thereby highlighting the importance of the second booster. Interestingly, similar cellular and humoral immune responses against SARS-CoV-2 WT and Delta were found after the second vaccine dose in the young and elderly groups.ConclusionsOur data demonstrate a full picture of cellular and humoral immune responses of BNT162b2-vaccinees in two age cohorts. In all vaccines, SARS-CoV-2 WT-specific antibodies with similar neutralizing activity were detected in all vaccinees. After the second vaccination, neutralization titers against SARS-CoV-2 Delta were impaired in both age groups compared with SARS-CoV-2 WT, thereby emphasizing the need for an additional booster to overcome rising variants of SARS-CoV-2.
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Affiliation(s)
- Michael Jäger
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Sissy Therese Sonnleitner
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
- Medical Laboratory, Department of Virology, Dr. Gernot Walder GmbH, Ausservillgraten, Austria
| | - Stefanie Dichtl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Eliott Lafon
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Gabriel Diem
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Gernot Walder
- Medical Laboratory, Department of Virology, Dr. Gernot Walder GmbH, Ausservillgraten, Austria
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
- *Correspondence: Wilfried Posch,
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15
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Affiliation(s)
- Alexander Kleine
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
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16
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Lafon E, Jäger M, Bauer A, Reindl M, Bellmann-Weiler R, Wilflingseder D, Lass-Flörl C, Posch W. Comparative analyses of IgG/IgA neutralizing effects induced by three COVID-19 vaccines against variants of concern. J Allergy Clin Immunol 2022; 149:1242-1252.e12. [PMID: 35093484 PMCID: PMC8799473 DOI: 10.1016/j.jaci.2022.01.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/09/2022] [Accepted: 01/14/2022] [Indexed: 11/21/2022]
Abstract
Background Few studies have directly compared virus-specific antibodies and their neutralizing capacity against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) wild type (WT) and circulating variants of concern despite the reported high efficacy of messenger RNA (mRNA)- and vector-based vaccines. Objective We assessed SARS-CoV-2 spike protein region 1 (S1)-specific antibodies of BNT162b2, mRNA-1273, and ChAdOx1 vaccinated as well as convalescent coronavirus disease 2019 (COVID-19) patients. We also determined the neutralization ability against SARS-CoV-2 WT and B.1.1.7 (Alpha), B1.1.7 E484K (Alpha-E484K), B.1.351 (Beta), and B.1.617.2 (Delta) variants. Methods Serum samples of 107 fully vaccinated or convalescent individuals were analyzed for anti–SARS-CoV-2-S1 IgG and IgA as well as for total anti–SARS-CoV-2 receptor binding domain Ig. Furthermore, neutralization capacity as 50% and 90% neutralization titer values against SARS-CoV-2 WT virus and circulating variants were determined. Results We observed a robust IgG response in all participants; however, the highest titers were detected in mRNA-based vaccine recipients. In case of serum IgA responses, the difference between mRNA- and vector-based vaccines or convalescent patients was even more pronounced. Interestingly, all 3 vaccines could neutralize all tested variants of concern in addition to WT virus, but in some individuals, only low or no neutralization, especially against Alpha-E484K and the Delta variant, was detected. Conclusion Our study of the efficacy of various COVID-19 vaccines found that mRNA-1273 had the highest neutralization abilities compared to BNT162b2 and ChAdOx1. COVID-19 convalescent patients demonstrated the most heterogeneous range of antibody titers and neutralization abilities, making it hard to assess protection. Furthermore, a significant positive relation between antibodies and the 50% neutralization titer values for immunized and convalescent individuals was determined.
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Kakkassery V, Koschmieder A, Walther F, Lehbrink R, Bertsche A, Wortmann SB, Buchmann J, Jäger M, Friedburg C, Lorenz B, Jünemann A. [Chorioretinal atrophy in pediatric cerebral folate deficiency-a preventable disease?]. Ophthalmologe 2021; 118:383-390. [PMID: 32632495 DOI: 10.1007/s00347-020-01126-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/30/2022]
Abstract
Cerebral folate deficiency (CFD) results in neurological alterations and a massive degeneration of the choroid/retina if left untreated, which limit the visual field and visual acuity. This article reports the case of a female patient with CFD, who developed autistic personal characteristics prior to reaching school age and first started to speak at the age of 3 years. At the age of 6 years she was presented because of unclear reduced visual acuity in the right eye. At that time mild bilateral peripheral chorioretinal atrophy was present, which subsequently became more pronounced. Additionally, a centrally emphasized chorioretinal atrophy further developed. Visual acuity of both eyes progressively deteriorated until stagnating at 0.1 at the age of 14 years. The causal assignment of the findings of the patient was not possible for many years. Choroideremia was excluded by molecular genetic testing (CHM gene with no mutations) and gyrate atrophy was ruled out by a normal ornithine level. The existence of a mitochondrial disease was almost completely excluded by exome sequencing. After the onset of further nonocular symptoms, e.g. neuromuscular disorders, electroencephalograph (EEG) alterations and autistic disorder, intensified laboratory diagnostics were performed in the treating pediatric hospital. Finally, an extremely low level of the folic acid metabolite 5‑methyltetrahydrofolate was detected in the cerebrospinal fluid (CSF) leading to the diagnosis of CFD. High-dose substitution treatment with folic acid was subsequently initiated. After excluding the presence of a pathogenic mutation of the FOLR1 gene for the cerebral folate receptor 1, a high titer blocking autoantibody against cerebral folate receptor 1 was detected as the cause.
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Affiliation(s)
- V Kakkassery
- Klinik und Poliklinik für Augenheilkunde, Universitätsmedizin Rostock, Doberaner Str. 140, 18057, Rostock, Deutschland. .,Klinik für Augenheilkunde, Campus Lübeck, Universitätsklinikum Schleswig-Holstein, Lübeck, Deutschland.
| | - A Koschmieder
- Klinik und Poliklinik für Augenheilkunde, Universitätsmedizin Rostock, Doberaner Str. 140, 18057, Rostock, Deutschland
| | - F Walther
- Kinder- und Jugendklinik, Universitätsmedizin Rostock, Rostock, Deutschland
| | - R Lehbrink
- Sektion Neuropädiatrie, Kinder- und Jugendklinik, Universitätsmedizin Rostock, Rostock, Deutschland.,Klinik für Kinder- und Jugendmedizin, Universitätsklinikum Münster, Münster, Deutschland
| | - A Bertsche
- Sektion Neuropädiatrie, Kinder- und Jugendklinik, Universitätsmedizin Rostock, Rostock, Deutschland
| | - S B Wortmann
- University Children's Hospital, Paracelsus Medical University (PMU), Salzburg, Österreich.,Institute of Human Genetics, Technical University München, München, Deutschland.,Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Amalia Children's Hospital, Radboudumc, Nijmegen, Niederlande
| | - J Buchmann
- Klinik für Psychiatrie, Neurologie, Psychosomatik und Psychotherapie im Kindes- und Jugendalter, Universitätsmedizin Rostock, Rostock, Deutschland
| | - M Jäger
- Klinik und Poliklinik für Augenheilkunde, Justus-Liebig-Universität Gießen, Standort Gießen, Universitätsklinikum Gießen und Marburg GmbH, Gießen, Deutschland
| | - C Friedburg
- Klinik und Poliklinik für Augenheilkunde, Justus-Liebig-Universität Gießen, Standort Gießen, Universitätsklinikum Gießen und Marburg GmbH, Gießen, Deutschland
| | - B Lorenz
- Klinik und Poliklinik für Augenheilkunde, Justus-Liebig-Universität Gießen, Standort Gießen, Universitätsklinikum Gießen und Marburg GmbH, Gießen, Deutschland
| | - A Jünemann
- Klinik und Poliklinik für Augenheilkunde, Universitätsmedizin Rostock, Doberaner Str. 140, 18057, Rostock, Deutschland
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Noll M, Jäger M, Lux L, Buettner C, Axt-Gadermann M. Improvement of Atopic Dermatitis by Synbiotic Baths. Microorganisms 2021; 9:microorganisms9030527. [PMID: 33806491 PMCID: PMC7998680 DOI: 10.3390/microorganisms9030527] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 02/01/2021] [Revised: 02/27/2021] [Accepted: 02/27/2021] [Indexed: 01/08/2023] Open
Abstract
Atopic dermatitis (AD) is a widespread chronic inflammatory dermatologic disorder. This randomized, double-blind study aims to evaluate the effect of synbiotic baths with a defined mixture of six viable lactic acid bacteria (LAB) and prebiotics, without bacteria and prebiotics and placebo baths without prebiotics and bacteria to treat AD patients over a period of 14 days. Therefore, AD patients were randomly assigned into three groups using synbiotic (n = 7), prebiotics (n = 8) or placebo baths (n = 7). Severity of AD was evaluated over time by using severity scoring of atopic dermatitis (SCORAD) and by patient questionnaires. In addition, microbiome on eczematous skin surface was sampled by swaps from each patient before the bath treatment, and after 9, 11 and 14 days of bath treatment. Thereafter, nucleic acids were extracted and the bacterial 16S rRNA gene was amplified via PCR for subsequent amplicon sequencing. Results showed a significantly reduced SCORAD over time of AD patients after daily synbiotic or prebiotic baths. Moreover, AD patients after daily synbiotic baths had a significantly improved pruritus and skin dryness and their bacterial microbiome was enriched by LAB. Taken together, a synbiotic bath is a promising topical skin application to alleviate AD.
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Affiliation(s)
| | - Michael Jäger
- Institute for Bioanalysis, Department of Applied Sciences, Coburg University of Applied Sciences and Arts, 96450 Coburg, Germany; (M.J.); (L.L.); (C.B.); (M.A.-G.)
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19
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Muench S, Burges R, Lex‐Balducci A, Brendel JC, Jäger M, Friebe C, Wild A, Schubert US. Adaptation of electrodes and printable gel polymer electrolytes for optimized fully organic batteries. Journal of Polymer Science 2021. [DOI: 10.1002/pol.20200746] [Citation(s) in RCA: 4] [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: 12/13/2022]
Affiliation(s)
- Simon Muench
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
| | - René Burges
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
| | - Alexandra Lex‐Balducci
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
| | - Johannes C. Brendel
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
| | - Christian Friebe
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
| | - Andreas Wild
- Research, Development & Innovation Evonik Operations GmbH Marl Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry Friedrich Schiller University Jena Jena Germany
- Center for Energy and Environmental Chemistry Jena Friedrich Schiller University Jena Jena Germany
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Abstract
Background In line with previous findings, in a recent randomized controlled trial (RCT), we found that home treatment (HT) for acute mental health care can reduce (substitute) hospital use among severely ill patients in crises. This study examined whether the findings of the RCT generalize to HT services provided under routine care conditions. Methods We compared patients who received HT during the RCT study phase with patients who received the same HT service after it had become part of routine mental health services in the same catchment area. Sociodemographic and clinical characteristics as well as service use (HT and hospital bed days) were compared between the RCT and the subsequent routine care study period. Results Compared to patients who received HT during the RCT, routine care HT patients were more often living with others, less often admitted compulsorily, more often diagnosed with anxiety and stress-related disorders (ICD-10 F4) and less often diagnosed with schizophrenia spectrum disorders (F2). When compared to patients who were exclusively treated on hospital wards, involvement of the HT team in patients’ care was associated with a clear-cut reduction of hospital bed days both during the RCT and under routine care conditions. However, unlike during the RCT study period, involvement of HT was associated with longer overall treatment episodes (inpatient + HT days) under routine care conditions. Conclusions HT seems to reduce the use of hospital bed days even under routine care conditions but is at risk of producing longer overall acute treatment episodes.
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Affiliation(s)
- N Stulz
- Integrated Psychiatric Services Winterthur-Zurcher Unterland, P.O. Box 144, CH-8408Winterthur, Switzerland
| | - W Kawohl
- Psychiatric Services Aargau, P.O. Box 432, CH-5201Brugg, Switzerland.,KPPP, University Hospital of Psychiatry Zurich, Lenggstrasse 31, CH-8008Zurich, Switzerland
| | - M Jäger
- KPPP, University Hospital of Psychiatry Zurich, Lenggstrasse 31, CH-8008Zurich, Switzerland.,Psychiatrie Baselland, Bienentalstrasse 7, CH-4410Liestal, Switzerland
| | - S Mötteli
- KPPP, University Hospital of Psychiatry Zurich, Lenggstrasse 31, CH-8008Zurich, Switzerland
| | - U Schnyder
- University of Zurich, CH-8001Zurich, Switzerland
| | - U Hepp
- Integrated Psychiatric Services Winterthur-Zurcher Unterland, P.O. Box 144, CH-8408Winterthur, Switzerland
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21
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Kampes R, Tepper R, Görls H, Bellstedt P, Jäger M, Schubert US. Facile and Reliable Emission-Based Nanomolar Anion Sensing by Luminescent Iridium Receptors Featuring Chelating Halogen-Bonding Sites. Chemistry 2020; 26:14679-14687. [PMID: 32686111 PMCID: PMC7756348 DOI: 10.1002/chem.202002738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 06/05/2020] [Indexed: 12/21/2022]
Abstract
An anion sensor is presented that combines a bidentate hydrogen‐ (HB) or halogen‐bonding (XB) site with a luminescent monocationic Ir fragment for strong binding of common anions (Ka up to 6×104
m−1) with diagnostic emission changes. A new emission‐based protocol for fast and reliable detection was derived on the basis of correction for systematic but unspecific background effects. Such a simple correction routine circumvents the hitherto practical limitations of systematic emission‐based analysis of anion binding with validated open‐source software (BindFit). The anticipated order of Ka values was obeyed according to size and basicity of the anions (Cl>Br=OAc) as well as the donor atom of the receptor (XB: 6×104
m−1 > HB: 5×103
m−1), and led to submicromolar limits of detection within minutes. The results were further validated by advanced NMR techniques, and corroborated by X‐ray crystallographic data and DFT analysis, which reproduced the structural and electronic features in excellent agreement. The results suggest that corrected emission‐based sensing may become a complementary, reliable, and fast tool to promote the use of XB in various application fields, due to the simple and fast optical determination at high dilution.
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Affiliation(s)
- Robin Kampes
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Ronny Tepper
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.,Current address: Intelligent fluids GmbH, Karl-Heine-Strasse 99, 04229, Leipzig, Germany
| | - Helmar Görls
- Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Peter Bellstedt
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743, Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743, Jena, Germany
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22
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Mayer C, Bittersohl B, Haversath M, Franz A, Krauspe R, Jäger M, Zilkens C. The learning curve of patient-specific unikondylar arthroplasty may be advantageous to off-the-shelf implants: A preliminary study. J Orthop 2020; 22:256-260. [PMID: 32435106 DOI: 10.1016/j.jor.2020.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 05/03/2020] [Indexed: 11/16/2022] Open
Abstract
Introduction Introducing a new arthroplasty system into clinical routine is challenging and could have an effect on early results. Since UKA are known to have failure mechanisms related to technical factors, reliable results and easy adoption are ideal. The question remains whether there are differences in objective procedure parameters in the early learning curve of different UKA systems. Methods two different UKA implants (Biomet Oxford[BO] followed by Conformis iuni[CI]) were introduced consecutively into clinical routine. We retrospectively analyzed the first 20 cases of each implant for one arthroplasty surgeon regarding operating time, correction of the mechanical axis, learning curve parameters, and revision rate of implants for 1.5 years postoperatively. Results Operating time (BO:98.3 ± 26.3min, CI:83.85 ± 21.8min (p < 0.078)), and tourniquet time differed in favor of the CI implant (BO:97.5 ± 29.5min; CI:73.5 ± 33.2 min; p < 0.017)). Mechanical alignment was restored in boths (preop:BO:mean 2.9°varus, CI:2.7°varus, postop:BOmean1.3°varus, CI:1°varus), while one BO patient and two CI patients were overcorrected. Operating time decreased from the first five implants to implants 16-20 for CI (95.2 ± 18.5min to 69 ± 21.5min, p < 0.076) and BO (130.6 ± 27.6min to 78 ± 17.3min, p < 0.009). Within 18 months of follow-up, 2 BO and 1 CI implants were revised. Conclusion The introduction of an UKA implant was associated with longer surgery in both implants. Procedure time seems to differ between implants, while a learning curve was observed regarding instrumentation. CI implants seem to be reliable and adaptable in a medium-volume practice. The early results of this retrospective single-surgeon study were in favor of the individualized implant. Certainly, further studies encompassing larger cohorts with various implants are needed.
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Affiliation(s)
- C Mayer
- Department of Orthopaedics and Trauma Surgery, University of Duisburg-Essen, St. Marien Hospital Mülheim, Mülheim, Germany
| | - B Bittersohl
- Department of Orthopaedics and Trauma Surgery, University of Duesseldorf, University Hospital Duesseldorf, Duesseldorf, Germany
| | - M Haversath
- Department of Orthopaedics, St. Vinzenz Hospital, Duesseldorf, Germany
| | - A Franz
- Department of Orthopaedics, Orthoparc Clinic, Cologne, Germany
| | - R Krauspe
- Department of Orthopaedics and Trauma Surgery, University of Duesseldorf, University Hospital Duesseldorf, Duesseldorf, Germany
| | - M Jäger
- Department of Orthopaedics and Trauma Surgery, University of Duisburg-Essen, St. Marien Hospital Mülheim, Mülheim, Germany
| | - C Zilkens
- Department of Orthopaedics, Orthoparc Clinic, Cologne, Germany
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23
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Schennach R, Riedel M, Obermeier M, Seemüller F, Jäger M, Schmauss M, Laux G, Pfeiffer H, Naber D, Schmidt L, Gaebel W, Klosterkötter J, Heuser I, Maier W, Lemke M, Rüther E, Klingberg S, Gastpar M, Möller HJ. What are depressive symptoms in acutely ill patients with schizophrenia spectrum disorder? Eur Psychiatry 2020; 30:43-50. [DOI: 10.1016/j.eurpsy.2014.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 11/01/2014] [Accepted: 11/03/2014] [Indexed: 10/24/2022] Open
Abstract
AbstractBackground:Aim was to examine depressive symptoms in acutely ill schizophrenia patients on a single symptom basis and to evaluate their relationship with positive, negative and general psychopathological symptoms.Methods:Two hundred and seventy-eight patients suffering from a schizophrenia spectrum disorder were analysed within a naturalistic study by the German Research Network on Schizophrenia. Using the Calgary Depression Scale for Schizophrenia (CDSS) depressive symptoms were examined and the Positive and Negative Syndrome Scale (PANSS) was applied to assess positive, negative and general symptoms. Correlation and factor analyses were calculated to detect the underlying structure and relationship of the patient’s symptoms.Results:The most prevalent depressive symptoms identified were depressed mood (80%), observed depression (62%) and hopelessness (54%). Thirty-nine percent of the patients suffered from depressive symptoms when applying the recommended cut-off of a CDSS total score of > 6 points at admission. Negligible correlations were found between depressive and positive symptoms as well as most PANSS negative and global symptoms despite items on depression, guilt and social withdrawal. The factor analysis revealed that the factor loading with the PANSS negative items accounted for most of the data variance followed by a factor with positive symptoms and three depression-associated factors.Limitations:The naturalistic study design does not allow a sufficient control of study results for the effect of different pharmacological treatments possibly influencing the appearance of depressive symptoms.Conclusion:Results suggest that depressive symptoms measured with the CDSS are a discrete symptom domain with only partial overlap with positive or negative symptoms.
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24
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Arshad MA, Pratiwi A, Hartung A, Jäger M. Influences on the direction probabilities for the direction instability phenomenon in fiber ring lasers. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202024313002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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25
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Winter A, Endres P, Schröter E, Jäger M, Görls H, Neumann C, Turchanin A, Schubert US. Towards Covalent Photosensitizer-Polyoxometalate Dyads-Bipyridyl-Functionalized Polyoxometalates and Their Transition Metal Complexes. Molecules 2019; 24:molecules24244446. [PMID: 31817289 PMCID: PMC6943497 DOI: 10.3390/molecules24244446] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 01/07/2023]
Abstract
A triol-functionalized 2,2'-bipyridine (bpy) derivative has been synthesized and used for the tris-alkoxylation of polyoxometalate (POM) precursors. The resultant POM-bpy conjugates of the Wells-Dawson- and Anderson-type feature a C-C bond as a linkage between the POM and bpy fragments. This structural motif is expected to increase the hydrolytic stability of the compounds. This is of particular relevance with respect to the application of POM-bpy metal complexes, as photocatalysts, in the hydrogen-evolution reaction (HER) in an aqueous environment. Accordingly, Rh(III) and Ir(III) complexes of the POM-bpy ligands have been prepared and characterized. These catalyst-photosensitizer dyads have been analyzed with respect to their electrochemical and photophysical properties. Cyclic and square-wave voltammetry, as well as UV/vis absorption and emission spectroscopy, indicated a negligible electronic interaction of the POM and metal-complex subunits in the ground state. However, emission-quenching experiments suggested an efficient intramolecular electron-transfer process from the photo-excited metal centers to the POM units to account for the non-emissive nature of the dyads (thus, suggesting a strong interaction of the subunits in the excited state). In-depth photophysical investigations, as well as a functional characterization, i.e., the applicability in the HER reaction, are currently ongoing.
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Affiliation(s)
- Andreas Winter
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; (A.W.); (P.E.); (E.S.); (M.J.)
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
| | - Patrick Endres
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; (A.W.); (P.E.); (E.S.); (M.J.)
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
| | - Erik Schröter
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; (A.W.); (P.E.); (E.S.); (M.J.)
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; (A.W.); (P.E.); (E.S.); (M.J.)
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
| | - Helmar Görls
- Institute for Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, Humboldtstr. 8, 07743 Jena, Germany;
| | - Christof Neumann
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
- Institute of Physical Chemistry (ICP), Friedrich Schiller University Jena, Lessingstr. 10, 07743 Jena, Germany
| | - Andrey Turchanin
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
- Institute of Physical Chemistry (ICP), Friedrich Schiller University Jena, Lessingstr. 10, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; (A.W.); (P.E.); (E.S.); (M.J.)
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany; (C.N.); (A.T.)
- Correspondence: ; Tel.: +49-3641-948201
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26
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Abstract
BACKGROUND Handball is one of the most popular team sports in Germany, as well as one of the most dangerous ones. Injury rates in Germany are higher amongst handball professionals than in soccer, with the knee being the most commonly injured joint. To prevent injuries, a functional inert stability is necessary, but definitions and objective measures are lacking. OBJECTIVES Establishing valid reference data of functional knee stability in amateur handball players with use of an established test battery giving objective measures METHODS: 261 athletes (f:130; m:131), mean age 25.1 ± 5.8 y were screened during the preseason. The test battery consisted of double and single-leg counter movement jumps, balance tests, agility, parkour, quick feet test and plyometric jumps. RESULTS Significant differences between males and females were noted in regard to balance scores (favour for females p ≤ 0.001), as well as jump height, agility and speed tests (favour for males [p ≤ 0.002-0.001]). CONCLUSION The noted differences once again bring focus to the interindividual presence of risk factors, because female and male handball athletes have gender-specific ground levels. These attributes have to be considered in further screening and prevention programs, as well as in the context of the return-to-sports decision after injury. The given data may serve as objective reference measures.
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Affiliation(s)
- C Mayer
- Universitätsklinik für Orthopädie und Unfallchirurgie, Pattbergstraße 1, 45239, Essen, Deutschland.
| | - A Rühlemann
- Universitätsklinik für Orthopädie und Unfallchirurgie, Pattbergstraße 1, 45239, Essen, Deutschland
| | - M Jäger
- Klinik für Unfall‑, Wiederherstellungs- & Orthopädische Chirurgie, St. Marien-Hospital Mülheim an der Ruhr, Mülheim/Ruhr, Deutschland
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27
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Abstract
During the past decade, technical innovations (e.g., carbon as a new material, disk brakes, hydraulic shock absorbers, electric transmissions) and lifestyle changes have significantly influenced recreational and professional cycling. In contrast to the past, where ambitious leisure cyclists were primarily interested in the recreational value of nature and landscape, cyclists of all ages are nowadays increasingly focused on performance and self-optimization. Simultaneously, manufacturers have adapted to differing customer requirements: besides the traditional extremities of road and mountain bikes, many specialized models have been designed for special applications: trekking, cyclocross, gravel, full-suspension, single-track, hardtail, downhill, fatbike, etc. For biking fans who are no longer able to meet their own demands due to individual physical restrictions or defined health problems, electric-assist bikes (pedelecs or "e-bikes") were recently introduced. While these are becoming increasingly popular, they have also increased the number of accidents and injuries. The current work provides an update on relevant sport medical and orthopaedic challenges brought on by these developments in cycling.
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Affiliation(s)
- J Hinder
- Institut für Sportmedizin, Universität Münster, Münster, Deutschland
| | - M Jäger
- Lehrstuhl für Orthopädie & Unfallchirurgie, Universität Duisburg-Essen, Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim a.d.R. (Contilia), Kaiserstraße 50, 45468, Mülheim/Ruhr, Deutschland.
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28
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Tassemeier T, Haversath M, Brandenburger D, Schutzbach M, Serong S, Jäger M. [Atraumatic fractures of the spine : Current strategies for diagnosis and treatment]. Orthopade 2019; 48:879-896. [PMID: 31511916 DOI: 10.1007/s00132-019-03804-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Atraumatic fractures of the spine are a common orthopedic disease condition that can be asymptomatic or associated with complaints of varying intensity and quality. The risk factors for such fracture forms are often metabolic and genetic diseases, which have a direct or indirect effect on bone metabolism and therefore secondarily affect the stability of the spinal vertebrae. Furthermore, benign and malignant tumors as well as infectious diseases can also be causative for atraumatic spinal fractures; however, those factors that are attributable to lifestyle habits should also not be underestimated. The treatment of affected patients is complex and nearly always interdisciplinary. In addition to purely symptom-oriented treatment concepts, orthoses in particular and when indicated surgical treatment procedures can be implemented. This article summarizes the important clinical, diagnostic and therapeutic aspects of atraumatic spinal fractures.
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Affiliation(s)
- T Tassemeier
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universität Duisburg Essen, Essen, Deutschland.
| | - M Haversath
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universität Duisburg Essen, Essen, Deutschland
| | - D Brandenburger
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universität Duisburg Essen, Essen, Deutschland
| | - M Schutzbach
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universität Duisburg Essen, Essen, Deutschland
| | - S Serong
- Klinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum des Saarlandes, Homburg, Deutschland
| | - M Jäger
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universität Duisburg Essen, Essen, Deutschland
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29
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Dittrich F, Busch A, Harren K, Jäger M, Landgraeber S, Reinecke F, Beck S. [Apps in clinical use in orthopedics and trauma surgery : The status quo in Germany]. Unfallchirurg 2019; 122:690-696. [PMID: 31127352 DOI: 10.1007/s00113-019-0675-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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] [Indexed: 11/25/2022]
Abstract
In the course of digitalization the smartphone is penetrating more and more areas of life giving the user mobile and almost ubiquitous access to the internet and other web applications. The advantages of mHealth are an integral part in some areas of patient care but in contrast to other disciplines, routine integration of mobile devices into orthopedics and trauma surgery is still in its infancy. A survey among German orthopedists and trauma surgeons revealed which kind of apps have become established in everyday clinical practice to date. Apps published by representative institutions such as the AO Foundation demonstrated the highest usage rates. In summary, the number of regularly used apps is low; however, the causes of this lack of acceptance have not yet been conclusively clarified. The authors of this study proclaim a significant increase in the use of mHealth and mobile devices in daily clinical practice in the future.
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Affiliation(s)
- F Dittrich
- Klinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum des Saarlandes, Gebäude 37, Kirrberger Straße, 66421, Homburg, Deutschland.
| | - A Busch
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universitätsmedizin Essen, Essen, Deutschland
| | - K Harren
- Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Essen, Essen, Deutschland
| | - M Jäger
- Universitätsklinik für Orthopädie und Unfallchirurgie, Universitätsmedizin Essen, Essen, Deutschland
| | - S Landgraeber
- Klinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum des Saarlandes, Gebäude 37, Kirrberger Straße, 66421, Homburg, Deutschland
| | - F Reinecke
- Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Essen, Essen, Deutschland
| | - S Beck
- Klinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum des Saarlandes, Gebäude 37, Kirrberger Straße, 66421, Homburg, Deutschland
- Zentrum für Orthopädie und Unfallchirurgie, Universitätsmedizin Essen, Essen, Deutschland
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30
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Mede T, Jäger M, Schubert US. High-Yielding Syntheses of Multifunctionalized Ru II Polypyridyl-Type Sensitizer: Experimental and Computational Insights into Coordination. Inorg Chem 2019; 58:9822-9832. [PMID: 31322344 DOI: 10.1021/acs.inorgchem.9b00847] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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
RuII complexes based on functionalized 2,6-di(quinolin-8-yl)pyridine (dqp) ligands feature excellent photophysical and geometrical properties, thus suggesting dqp ligands as ideal surrogates for 2,2'-bipyridine (bpy) or 2,2':6',2″-terpyridine (tpy). However, the synthesis of multifunctionalized [Ru(dqp)2]2+-based complexes is often low-yielding, which has hampered their practical value to date. In this study, a universal high-yielding route was explored and corroborated by a mechanistic investigation based on 1H NMR, MS, and density functional theory. With application of high-boiling but less-coordinating solvents (i.e., DMF) during the coordination of dqp by the precursor [Ru(dqp)(MeCN)3]2+, the required reaction temperature is lowered considerably (by 30 °C). In comparison to tpy, the reaction rate for dqp is further reduced which is assigned to the higher steric demand upon the coordination process. Namely, the onset of coordination of a tpy derivative at 60 °C and of dqp at 90 °C is significantly milder than in previous protocols. The versatility of the procedure is demonstrated by the high-yielding syntheses of multifunctionalized RuII complexes reaching up to 90%, whereby the presence of hydroxyl groups and losses during purification may lower the isolated yields substantially. In addition, the same strategy of high-boiling but less-coordinating solvents enabled a milder one-pot protocol to prepare [Ru(dqp)2]2+ from a [Ru(MeCN)6]2+ source, i.e., without the need for in situ reduction or halide abstraction as typical for RuIIICl3 hydrate. Hence, the developed protocol benefits from an improved thermal tolerance of sensitive functional groups, which may be applicable also to related polypyridyl-type ligands.
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Affiliation(s)
- Tina Mede
- Laboratory of Organic and Macromolecular Chemistry (IOMC) , Friedrich Schiller University Jena , Humboldtstraße 10 , 07743 Jena , Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC) , Friedrich Schiller University Jena , Humboldtstraße 10 , 07743 Jena , Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena) , Friedrich Schiller University Jena , Philosophenweg 7a , 07743 Jena , Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC) , Friedrich Schiller University Jena , Humboldtstraße 10 , 07743 Jena , Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena) , Friedrich Schiller University Jena , Philosophenweg 7a , 07743 Jena , Germany
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31
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Schroot R, Jäger M, Schubert US. Accumulative Charging of Redox-Active Side-Chain-Modified Polymers: Experimental and Computational Insights from Oligo- to Polymeric Triarylamines. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert Schroot
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
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32
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Janssen G, Pourhassan M, Lenzen-Großimlinghaus R, Jäger M, Schäfer R, Spamer C, Cuvelier I, Volkert D, Wirth R. The Refeeding Syndrome revisited: you can only diagnose what you know. Eur J Clin Nutr 2019; 73:1458-1463. [PMID: 31127188 DOI: 10.1038/s41430-019-0441-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/10/2019] [Accepted: 05/13/2019] [Indexed: 02/08/2023]
Abstract
BACKGROUND/OBJECTIVES The Refeeding Syndrome (RFS) is a serious complication in patients receiving nutrition support after a period of severe malnutrition. We frequently recognize and diagnose the RFS due to increased awareness. Thus, we observe that many physicians do not know the RFS and that it is rarely diagnosed. The aim of the study was to determine whether physicians in Germany know the RFS. SUBJECTS/METHODS A questionnaire with a case vignette about an older person who developed the RFS after initiation of nutritional therapy was submitted to German physicians and fifth year medical students, who were participants of educational lectures. RESULTS Of the 281 participants who answered the respective question, 40 participants (14%) correctly diagnosed the RFS of the case vignette and 21 participants (8%) gave nearly correct answers. Indeed, the majority of the participants did not diagnose the RFS. CONCLUSIONS Although the RFS may lead to fatal complications, it is unknown to the majority of the queried physicians. Therefore, there is a call to implement the RFS in respective curricula and increase systematic education on this topic.
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Affiliation(s)
- G Janssen
- Department for Geriatric Medicine, Marien Hospital Herne - University Hospital, Ruhr-Universität Bochum, Herne, Germany
| | - M Pourhassan
- Department for Geriatric Medicine, Marien Hospital Herne - University Hospital, Ruhr-Universität Bochum, Herne, Germany
| | | | - M Jäger
- Hüttenhospital, Dortmund, Germany
| | - R Schäfer
- GFO Kliniken Rhein-Berg, Bergisch Gladbach, Germany
| | | | - I Cuvelier
- Department of Geriatric Medicine, ViDia Christliche Kliniken Karlsruhe, Karlsruhe, Germany
| | - D Volkert
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nürnberg, Germany
| | - R Wirth
- Department for Geriatric Medicine, Marien Hospital Herne - University Hospital, Ruhr-Universität Bochum, Herne, Germany.
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Haversath M, Klebingat S, Jäger M. [Not Available]. Orthopade 2019; 48:257. [PMID: 30758538 DOI: 10.1007/s00132-019-03698-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- M Haversath
- Klinik für Orthopädie und Unfallchirurgie, Universitätsmedizin Essen, Hufelandstraße 55, 45147, Essen, Deutschland
| | - S Klebingat
- Institut für Medizintechnik und Forschungscampus STIMULATE, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - M Jäger
- Klinik für Orthopädie und Unfallchirurgie, Universitätsmedizin Essen, Hufelandstraße 55, 45147, Essen, Deutschland.
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Mede T, Jäger M, Schubert US. "Chemistry-on-the-complex": functional Ru II polypyridyl-type sensitizers as divergent building blocks. Chem Soc Rev 2018; 47:7577-7627. [PMID: 30246196 DOI: 10.1039/c8cs00096d] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ruthenium polypyridyl type complexes are potent photoactive compounds, and have found - among others - a broad range of important applications in the fields of biomedical diagnosis and phototherapy, energy conversion schemes such as dye-sensitized solar cells (DSSCs) and molecular assemblies for tailored photo-initiated processes. In this regard, the linkage of RuII polypyridyl-type complexes with specific functional moieties is highly desirable to enhance their inherent photophysical properties, e.g., with a targeting function to achieve cell selectivity, or with a dye or redox-active subunits for energy- and electron-transfer. However, the classical approach of performing ligand syntheses first and the formation of Ru complexes in the last steps imposes synthetic limitations with regard to tolerating functional groups or moieties as well as requiring lengthy convergent routes. Alternatively, the diversification of Ru complexes after coordination (termed "chemistry-on-the-complex") provides an elegant complementary approach. In addition to the Click chemistry concept, the rapidly developing synthesis and purification methodologies permit the preparation of Ru conjugates via amidation, alkylation and cross-coupling reactions. In this regard, recent developments in chromatography shifted the limits of purification, e.g., by using new commercialized surface-modified silica gels and automated instrumentation. This review provides detailed insights into applying the "chemistry-on-the-complex" concept, which is believed to stimulate the modular preparation of unpreceded molecular assemblies as well as functional materials based on Ru-based building blocks, including combinatorial approaches.
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Affiliation(s)
- Tina Mede
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany.
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Abstract
BACKGROUND The application of cell- and growth factor-based techniques in conjunction with conventional surgical approaches has great therapeutic potential for the treatment of avascular necrosis of the femoral head (AVNFH). OBJECTIVES This review provides an overview of new strategies for the treatment of AVNFH, with emphasis on cell and growth factor-based approaches. MATERIALS AND METHODS The results of a literature search are summarised, the most relevant publications are presented and discussed by the authors. RESULTS In the focus of new strategies for treatment of AVNFH are bone marrow-derived cell concentrates and ex vivo-expanded mesenchymal stem cells. Besides local application during core decompression, the systemic administration of cells via blood vessels supplying the femoral head is an interesting approach. The application of osteogenic and angiogenic growth factor-laden scaffold materials has also been clinically tested. Initial results of randomised clinical trials using cell- and growth factor-based approaches underline the potential of these innovative therapeutic strategies. Cell-based therapies are governed by EU law and generally require a manufacturing authorization. CONCLUSION To date, only few randomized controlled clinical trials are available which additionally display a considerable diversity concerning cell parameters, cell processing, adjuvant surgical techniques and the quality outcome parameters. Therefore, a final statement about the effectiveness of new cell and growth factor-based strategies is currently not possible.
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Affiliation(s)
- L Rackwitz
- Klinik für Orthopädie und Unfallchirurgie, Evangelisches Waldkrankenhaus Spandau, Stadtrandstraße 555, 13589, Berlin, Deutschland.
| | - J C Reichert
- Klinik für Orthopädie und Unfallchirurgie, Evangelisches Waldkrankenhaus Spandau, Stadtrandstraße 555, 13589, Berlin, Deutschland
| | - M Haversath
- Klinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Essen, Essen, Deutschland
| | - U Nöth
- Klinik für Orthopädie und Unfallchirurgie, Evangelisches Waldkrankenhaus Spandau, Stadtrandstraße 555, 13589, Berlin, Deutschland
| | - M Jäger
- Klinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Essen, Essen, Deutschland
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Moock P, Kasper L, Jäger M, Stolarek D, Richter H, Bruns J, Petermann K. TDM-controlled ring resonator arrays for fast, fixed-wavelength optical biosensing. Opt Express 2018; 26:22356-22365. [PMID: 30130930 DOI: 10.1364/oe.26.022356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
A novel control concept for serial ring resonator arrays based on a time-division multiplex (TDM) approach is presented. It allows fast sampling rates in terms of biological kinetics. The novelty consists of using both thermal tuning of the effective refractive index and thermo-optical multiplexing for the silicon-on-insulator (SOI) ring resonator arrays, without the need for a tunable laser source. Using a fixed wavelength, fast read-out rates of 100 Hz are demonstrated for each ring.
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Abstract
The digitalization in medicine has led to almost universal availability of information to different healthcare professionals and accelerated clinical pathways. Fast-track concepts and short hospital stays require intelligent and practicable systems in preventive and rehabilitation medicine. This includes optimization of movement analysis by innovative tools such as detectors sensing skin movements, portable feedback systems for monitoring, robot-assisted devices, and prevention programs based on reliable data. Finally, clinical structures are needed to exploit the maximal potential of artificial intelligence (AI) and deep learning. One example is the establishment of inter- and transdisciplinary professional teams such as a RehaBoard. In contrast to other cost-intensive disciplines such as oncology, the introduction of AI into rehabilitation orthopedics and trauma surgery with the support of cross-sectoral cooperation has great potential for performing well in patient benefit-orientated competition (value-based competition).
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Affiliation(s)
- M Jäger
- Klinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Essen, Hufelandstraße 55, 45274, Essen, Deutschland.
| | - C Mayer
- Klinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Essen, Hufelandstraße 55, 45274, Essen, Deutschland
| | - H Hefter
- Klinik für Neurologie, Universitätsklinikum Düsseldorf, Düsseldorf, Deutschland
| | - M Siebler
- Neurologie, MediClin Fachklinik Rhein/Ruhr, Essen, Deutschland
| | - A Kecskeméthy
- Lehrstuhl für Mechanik und Robotik, Universität Duisburg-Essen, Duisburg, Deutschland
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Haversath M, Klebingat S, Jäger M. Abriebanalyse mit virtuellen CAD-basierten Röntgenaufnahmen in der Endoprothetik. Orthopäde 2018; 47:811-819. [DOI: 10.1007/s00132-018-3602-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Puente Reyna AL, Holderied M, Jäger M, Schilling C, Grupp TM. ARTICULATION AND BACKSIDE WEAR ANALYSIS AFTER LONG-TERM IN VITRO WEAR SIMULATION OF VITAMIN E STABILIZED POLYETHYLENE ACETABULAR LINERS WITH A PRESS-FIT LOCKING MECHANISM. ACTA ACUST UNITED AC 2018. [DOI: 10.21823/2311-2905-2018-24-2-29-40] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A previous retrieval study analyzed the backside wear of short-term implanted liners against in vitro tested liners of similar life in service and showed comparable results among both groups, with no significant backside wear due to micro-motion.The purpose — to obtain a picture of the overall wear (articulation and backside surfaces) of 0.1% vitamin e blended polyethylene liners, with a locking mechanism based on a press-fit cone in combination with a rough titanium conical inner surface in the fixation area, under a 20 million cycles hip wear simulation.Materials and Methods. A semi-quantitative method was used in order to assess the damage on the backside of the liners and a 3d measuring machine to assess the creep and wear at the articulation surface.Results. The total average backside wear score was 22.00±2.59 from a maximum total score of 147 after 5 million cycles (mc), increased to 31.92±5.57 after 10 mc, but showed no further increment after 15 and 20 mc. The reference liners (subjected only to axial load) showed similar wear scores and modes as the liners under wear simulation (axial load and movement). Small scratches produced during insertion and removal were clearly seen at the rim (fixation) area and no considerable abrasion was observed. The machining marks on the convex surface were always visible. Regarding the articulation surface, a steady state wear rate of 7 µm/year was measured.Conlusion. These results determined that most of the backside wear produced on the liners occurred during their insertion and removal rather than during their life in service. Moreover, the wear at the articulation surface was similar to that seen in vivo at short- and mid-term on highly cross-linked polyethylene liners with and without vitamin e content.
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Tepper R, Schulze B, Bellstedt P, Heidler J, Görls H, Jäger M, Schubert US. Halogen-bond-based cooperative ion-pair recognition by a crown-ether-embedded 5-iodo-1,2,3-triazole. Chem Commun (Camb) 2018; 53:2260-2263. [PMID: 28150008 DOI: 10.1039/c6cc09749a] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A crown-ether containing the iodo-triazole moiety for simultaneous cation-anion binding through Lewis-basic nitrogen atoms and C-II halogen-bond-donating iodine atoms was prepared. The complexation of the heteroditopic receptor was illustrated by X-ray and DFT analysis. The cooperative effect boosting the anion affinity was quantified by 1H/13C NMR titration experiments.
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Affiliation(s)
- Ronny Tepper
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany. and Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Benjamin Schulze
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany. and Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Peter Bellstedt
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany. and Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Jan Heidler
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany. and Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Helmar Görls
- Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany. and Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany. and Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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Schlotthauer T, Schroot R, Glover S, Hammarström L, Jäger M, Schubert US. A multidonor-photosensitizer-multiacceptor triad for long-lived directional charge separation. Phys Chem Chem Phys 2018; 19:28572-28578. [PMID: 29034949 DOI: 10.1039/c7cp05593e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The modular assembly of a directional photoredox-active multidonor-photosensitizer-multiacceptor (Dn-P-Am) architecture is presented. The triad assembly features a central Ru(ii) sensitizer equipped with pendant polymer chains consisting of multiple triarylamine (pTARA) and naphthalene diimide (pNDI) units, respectively. Upon excitation, the efficient formation (>96%) of charge separation (CS) was observed featuring similar CS lifetimes (400 ns) as related molecular triads. In contrast, a significant additional longer-lived CS component (2400 ns, 30%) is observed indicating multiple contributing pathways.
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Affiliation(s)
- Tina Schlotthauer
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany.
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Abstract
ZusammenfassungDie Zahl der tuberkulösen Neuerkrankungen ist in Deutschland inzwischen gering. Bei nicht eingeschränkter Immunkompetenz kommt es nur in etwa 3–5 % aller Tuberkulosefälle zu einer skelettalen Manifestation. Bei immungeschwächten Patienten, wie HIV-Infizierten, Diabetikern oder bei medikamentös indizierter Immunsupression steigt der Anteil der ossären Manifestation einer Tuberkulose aber erheblich an. Deshalb sollte bei jedem immunsupprimierten Patienten mit Rückenschmerzen frühzeitig auch an eine tuberkulöse Infektion gedacht werden.
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Riedel M, Bottlender R, von Wilmsdorff M, Wölwer W, Gaebel W, Möller HJ, Maier W, Jäger M. Medikamentöse Akutbehandlung schizophrener Ersterkrankungen. ACTA ACUST UNITED AC 2018. [DOI: 10.1055/s-0038-1626437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ZusammenfassungAtypische Neuroleptika werden heute für die Behandlung von Patienten mit schizophrenen Erkrankungen als Therapie der ersten Wahl empfohlen, da sie gegenüber den typischen Neuroleptika deutliche Vorteile hinsichtlich des Wirkungsspektrums und des Nebenwirkungsprofils aufweisen. Dies trifft insbesondere für ersterkrankte Patienten zu, da für diese Patientengruppe im Vergleich zu Mehrfacherkrankten ein höheres Risiko für extrapyramidal-motorische Nebenwirkungen beschrieben wurde. Ob die Vorteile der atypischen Neuroleptika aber auch nachweisbar sind, wenn typische Neuroleptika in niedrigen Dosierungen eingesetzt werden, ist bisher empirisch unzureichend geprüft. Vor diesem Hintergrund wurden im Rahmen einer multizentrischen, doppelblinden, randomisierten klinischen Studie des Kompetenznetz Schizophrenie die Effekte von Risperidon und Haloperidol im Niedrigdosisbereich (Tagesdosen von 2 mg bis maximal 8 mg für beide Medikamente) in der Akutbehandlung ersterkrankter Patienten verglichen.
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Abstract
ZusammenfassungNeben nichtoperativen Behandlungsstrategien und dem endoprothetischen Gelenkersatz nehmen gelenkerhaltende Operationstechniken am Hüftgelenk eine Zwischenstellung in der Therapie der avaskulären Osteonekrose (AVN) ein. Die einzelnene Verfahren verfolgen hierbei verschiedene Ziele. Neben der seit vielen Jahren etablierten Entlastungsbohrung (Core Decompression), der Spongiosaplastik und aktueller innovativer Therapien (autologe Zelltherapie, Osteonekrosenagel, femoraler Teilgelenkersatz) besteht in ausgewählten Fällen die Indikation, ein betroffenes Osteonekroseareal durch eine Umstellungsosteotomie aus der Hauptbelastungszone zu schwenken. Die Entscheidung für hüftgelenknahe Osteotomien ist jedoch aufgrund eigener Erfahrungen sowie unter Berücksichtigung von umfangreichen Daten aus der wissenschaftlichen Literatur kritisch zu stellen, da bei bereits primär kritischer Durchblutung des Femurkopfes diese operationsbedingt zusätzlich beeinträchtigt werden können und sich das mittelfristige klinische Ergebnis im Einzelfall nur sehr schwer vorhersagen lässt. Ob minimalinvasive und regenerative Therapien zukünftig einen festen Stellenwert in der Behandlung der Femurkopfnekrose einnehmen werden, wird derzeit anhand experimenteller und klinischer Studien untersucht.
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Schulze B, Friebe C, Jäger M, Görls H, Birckner E, Winter A, Schubert US. PtII Phosphors with Click-Derived 1,2,3-Triazole-Containing Tridentate Chelates. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00777] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- B. Schulze
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - C. Friebe
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - M. Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - H. Görls
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - E. Birckner
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - A. Winter
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - U. S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
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Schroot R, Schlotthauer T, Dietzek B, Jäger M, Schubert US. Extending Long-lived Charge Separation Between Donor and Acceptor Blocks in Novel Copolymer Architectures Featuring a Sensitizer Core. Chemistry 2017; 23:16484-16490. [DOI: 10.1002/chem.201704180] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Indexed: 02/01/2023]
Affiliation(s)
- Robert Schroot
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstraße 10 07743 Jena Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena); Friedrich Schiller University Jena; Philosophenweg 7a 07743 Jena Germany
| | - Tina Schlotthauer
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstraße 10 07743 Jena Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena); Friedrich Schiller University Jena; Philosophenweg 7a 07743 Jena Germany
| | - Benjamin Dietzek
- Center for Energy and Environmental Chemistry Jena (CEEC Jena); Friedrich Schiller University Jena; Philosophenweg 7a 07743 Jena Germany
- Institute for Physical Chemistry and Abbe Center of Photonics (ACP); Friedrich Schiller University Jena; Helmholtzweg 4 07743 Jena Germany
- Leibniz Institute for Photonic Technology (IPHT); Albert-Einstein-Straße 9 07743 Jena Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstraße 10 07743 Jena Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena); Friedrich Schiller University Jena; Philosophenweg 7a 07743 Jena Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstraße 10 07743 Jena Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena); Friedrich Schiller University Jena; Philosophenweg 7a 07743 Jena Germany
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Abstract
Intra- and, respectively, periarticular osteoid osteoma are accompanied by sympathical arthritis which itself can irreversibly destroy the cartilage of the joint. In contrast to other locations, intra- and periarticular osteoid osteoma are rare. Reactive and symptomatic accompanying arthritis may lead to irreversible cartilage destruction especially in chronic courses. Therefore early diagnosis and therapy is crucial. We present a case report and discuss these rare tumors by reviewing the literature.
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Affiliation(s)
- M Husen
- Klinik für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Hufelandstraße 55, 45137, Essen, Deutschland
| | - M Hövel
- Klinik für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Hufelandstraße 55, 45137, Essen, Deutschland
| | - M Jäger
- Klinik für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Hufelandstraße 55, 45137, Essen, Deutschland.
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49
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Abstract
The replacement of hip and knee joints is one of the greatest success stories in orthopedics. Due to continuous improvement of biomaterials and implant design, patient-associated problems are now mostly multifactorial and only rarely caused by the implant. Abrasion was significantly reduced by the introduction of highly cross-linked polyethylene (PE), antioxidant stabilized PE, new ceramics and the development of ceramic and protective surfaces. It is assumed that further reduction of frictional resistance will not lead to a significantly better clinical result: however, the problem of periprosthetic infections and implant-related incompatibility is still unsolved and remains challenging for biomaterial research. For the knee joint PE will be irreplaceable for joint articulation even in the future due to the contact situation. Mobile bearings and fixed bearings are two established successful philosophies, which have shown comparably good clinical results. For the hip joint, it is forecasted that ceramic-on-ceramic will be the system of the future if the correct positioning and mounting of the components can be solved so that the problems, such as development of noise and breakage can be reduced to a minimum. An in-depth understanding and detailed knowledge of the biomaterials by the surgeon can prevent implant-related problems. For elderly patients it is assumed that the economic burden on the public healthcare system will have the strongest impact on implant selection.
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Affiliation(s)
- M M Morlock
- Institut für Biomechanik, TUHH Hamburg University of Technology, Denickestr. 15, 21073, Hamburg, Deutschland.
| | - M Jäger
- Klinik für Orthopädie und Unfallchirurgie, Universität Duisburg-Essen, Hufelandstr. 55, 45274, Essen, Deutschland
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50
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Schlotthauer T, Parada GA, Görls H, Ott S, Jäger M, Schubert US. Asymmetric Cyclometalated Ru II Polypyridyl-Type Complexes with π-Extended Carbanionic Donor Sets. Inorg Chem 2017; 56:7720-7730. [PMID: 28677955 DOI: 10.1021/acs.inorgchem.7b00392] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of novel cyclometalated RuII complexes were investigated featuring the tridentate dqp ligand platform (dqp is 2,6-di(quinolin-8-yl)pyridine), in order to utilize the octahedral coordination mode around the Ru center to modulate the electrochemical and photophysical properties. The heteroleptic complexes feature C1 symmetry due to symmetry breaking by the peripheral five- or six-membered carbanionic chelate (phenyl, naphthyl, or anthracenyl units). The chelation mode is controlled by the steric effects and C-H activation selectivity of the ligand, which prompted the development of a general synthesis protocol. The optimized conditions to achieve high overall yields (55-75%) involve NaHCO3 as the base and an simplified purification protocol: i.e., facile chromatographic separation using commercially available amino-functionalized silica applying nonaqueous salt-free conditions to omit the necessity of counterion exchange. The structural, photophysical, and electrochemical properties were studied in depth, and the results were corroborated by density functional theory (DFT) calculations. Steady state and time-resolved spectroscopy revealed red-shifted absorption (up to 750 nm) and weak IR emission (800-1000 nm) combined with prolonged emission lifetimes (up to 20 ns) in comparison to classical tpy-based (tpy is 2,2':6',2″-terpyridine) complexes. An enhanced stability was observed by blocking the reactive positions of the carbanionic ligand framework, while the reactive positions may be exploited for further functionalization.
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Affiliation(s)
- Tina Schlotthauer
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena , Humboldtstraße 10, 07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena , Philosophenweg 7a, 07743 Jena, Germany
| | - Giovanny A Parada
- Department of Chemistry, Ångström Laboratory, Uppsala University , Box 523, SE-75120 Uppsala, Sweden
| | - Helmar Görls
- Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena , Lessingstraße 8, 07743 Jena, Germany
| | - Sascha Ott
- Department of Chemistry, Ångström Laboratory, Uppsala University , Box 523, SE-75120 Uppsala, Sweden
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena , Humboldtstraße 10, 07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena , Philosophenweg 7a, 07743 Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena , Humboldtstraße 10, 07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena , Philosophenweg 7a, 07743 Jena, Germany
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