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Limburg H, Schwerdtner M, Wilson E, Roth B, Cassart JP, Werner AD, Harbig A, Böttcher-Friebertshäuser E, Stokes A. pH inactivation of SARS-CoV-2 and SARS-CoV in virus spiked protein A eluates from a mAb purification process. Biologicals 2024; 86:101753. [PMID: 38492418 DOI: 10.1016/j.biologicals.2024.101753] [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: 07/15/2022] [Accepted: 02/20/2024] [Indexed: 03/18/2024] Open
Abstract
Biopharmaceutical manufacturing processes may include a low pH treatment step as a means of inactivating enveloped viruses. Small scale virus clearance studies are routinely performed using model enveloped viruses such as murine leukemia virus to assess inactivation at the pH range used in the downstream manufacturing process. Further, as a means of bioburden reduction, chromatography resins may be cleaned and stored using sodium hydroxide and this can also inactivate viruses. The susceptibility of SARS-CoV-2 and SARS-CoV to low pH conditions using protein A eluate derived material from a monoclonal antibody production process as well as high pH cleaning conditions was addressed. SARS-CoV-2 was effectively inactivated at pH 3.0, moderately inactivated at pH 3.4, but not inactivated at pH 3.8. Low pH was less effective at inactivating SARS-CoV. Both viruses were inactivated at a high pH of ca.13.4. These studies provide important information regarding the effectiveness of viral clearance and inactivation steps of novel coronaviruses when compared to other enveloped viruses.
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Affiliation(s)
- Hannah Limburg
- Institute of Virology, Philipps-University Marburg, 35043, Marburg, Germany
| | - Marie Schwerdtner
- Institute of Virology, Philipps-University Marburg, 35043, Marburg, Germany
| | - Eileen Wilson
- GSK Medicine Development and Supply King of Prussia, PA19406, USA
| | - Bernhard Roth
- Product Quality Strategy Viral and Adjuvants GSK Vaccines, Belgium
| | | | | | - Anne Harbig
- Institute of Virology, Philipps-University Marburg, 35043, Marburg, Germany
| | | | - Anne Stokes
- GSK Medicine Development and Supply King of Prussia, PA19406, USA.
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Günther A, Deja Y, Kilic M, Tran K, Kotra P, Renz F, Kowalsky W, Roth B. Investigation of the molecular switching process between spin crossover states of triazole complexes as basis for optical sensing applications. Sci Rep 2024; 14:5897. [PMID: 38467722 DOI: 10.1038/s41598-024-56427-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 03/06/2024] [Indexed: 03/13/2024] Open
Abstract
With the advent of the first laser sources and suitable detectors, optical sensor applications immediately also came into focus. During the last decades, a huge variety of optical sensor concepts were developed, yet the forecast for the future application potential appears even larger. In this context, the development of new sensor probes at different scales down to the atomic or molecular level open new avenues for research and development. We investigated an iron based triazole molecular spin-crossover complex changing its absorption characteristics significantly by varying environmental parameters such as humidity, temperature, magnetic or electric field, respectively, with respect to its suitability for a new class of versatile molecular sensor probes. Hereby, besides the investigation of synthesized pure bulk material using different analyzing methods, we also studied amorphous micro particles which were applied in or onto optical waveguide structures. We found that significant changes of the reflection spectra can also be obtained after combining the particles with different types of optical waveguides.The obtained results demonstrate the suitability of the material complex for a broad field of future sensor applications.
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Affiliation(s)
- Axel Günther
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167, Hannover, Germany.
- Institute of High Frequency Technology, Technical University Braunschweig, 38106, Braunschweig, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering-Innovation Across Disciplines), 30167, Hannover, Germany.
| | - Yves Deja
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167, Hannover, Germany
| | - Maximilian Kilic
- Institute of Inorganic Chemistry, Leibniz University Hannover, 30167, Hannover, Germany
| | - Kevin Tran
- Institute of Inorganic Chemistry, Leibniz University Hannover, 30167, Hannover, Germany
| | - Pavan Kotra
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167, Hannover, Germany
| | - Franz Renz
- Institute of Inorganic Chemistry, Leibniz University Hannover, 30167, Hannover, Germany
| | - Wolfgang Kowalsky
- Institute of High Frequency Technology, Technical University Braunschweig, 38106, Braunschweig, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering-Innovation Across Disciplines), 30167, Hannover, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering-Innovation Across Disciplines), 30167, Hannover, Germany
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Kukk AF, Scheling F, Panzer R, Emmert S, Roth B. Non-invasive 3D imaging of human melanocytic lesions by combined ultrasound and photoacoustic tomography: a pilot study. Sci Rep 2024; 14:2768. [PMID: 38307985 PMCID: PMC10837440 DOI: 10.1038/s41598-024-53220-y] [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: 11/07/2023] [Accepted: 01/30/2024] [Indexed: 02/04/2024] Open
Abstract
The accurate determination of the size and depth of infiltration is critical to the treatment and excision of melanoma and other skin cancers. However, current techniques, such as skin biopsy and histological examination, pose invasiveness, time-consumption, and have limitations in measuring at the deepest level. Non-invasive imaging techniques like dermoscopy and confocal microscopy also present limitations in accurately capturing contrast and depth information for various skin types and lesion locations. Thus, there is a pressing need for non-invasive devices capable of obtaining high-resolution 3D images of skin lesions. In this study, we introduce a novel device that combines 18 MHz ultrasound and photoacoustic tomography into a single unit, enabling the acquisition of colocalized 3D images of skin lesions. We performed in vivo measurements on 25 suspicious human skin nevi that were promptly excised following measurements. The combined ultrasound/photoacoustic tomography imaging technique exhibited a strong correlation with histological Breslow thickness between 0.2 and 3 mm, achieving a coefficient of determination (R[Formula: see text]) of 0.93, which is superior to the coefficients from the individual modalities. The results procured in our study underscore the potential of combined ultrasound and photoacoustic tomography as a promising non-invasive 3D imaging approach for evaluating human nevi and other skin lesions. Furthermore, the system allows for integration of other optical modalities such as optical coherence tomography, microscopy, or Raman spectroscopy in future applications.
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Affiliation(s)
- Anatoly Fedorov Kukk
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Straße 17, 30167, Hannover, Germany.
| | - Felix Scheling
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Straße 17, 30167, Hannover, Germany
| | - Rüdiger Panzer
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Strempelstraße 13, 18057, Rostock, Germany
| | - Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Strempelstraße 13, 18057, Rostock, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Straße 17, 30167, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines), Welfengarten 1a, 30167, Hannover, Germany
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Sülz S, Fügener A, Becker-Peth M, Roth B. The potential of patient-based nurse staffing - a queuing theory application in the neonatal intensive care setting. Health Care Manag Sci 2024:10.1007/s10729-024-09665-8. [PMID: 38286888 DOI: 10.1007/s10729-024-09665-8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 01/11/2024] [Indexed: 01/31/2024]
Abstract
Faced by a severe shortage of nurses and increasing demand for care, hospitals need to optimally determine their staffing levels. Ideally, nurses should be staffed to those shifts where they generate the highest positive value for the quality of healthcare. This paper develops an approach that identifies the incremental benefit of staffing an additional nurse depending on the patient mix. Based on the reasoning that timely fulfillment of care demand is essential for the healthcare process and its quality in the critical care setting, we propose to measure the incremental benefit of staffing an additional nurse through reductions in time until care arrives (TUCA). We determine TUCA by relying on queuing theory and parametrize the model with real data collected through an observational study. The study indicates that using the TUCA concept and applying queuing theory at the care event level has the potential to improve quality of care for a given nurse capacity by efficiently trading situations of high versus low workload.
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Affiliation(s)
- Sandra Sülz
- Erasmus School of Health Policy & Management, Burg. Oudlaan 50, 3062 PA, Rotterdam, The Netherlands.
| | - Andreas Fügener
- Department of Supply Chain Management & Management Science, University of Cologne, Albertus-Magnus Platz, 50923, Cologne, Germany
| | - Michael Becker-Peth
- Rotterdam School of Management, Burg. Oudlaan 50, 3062 PA, Rotterdam, The Netherlands
| | - Bernhard Roth
- Department of Neonatology and Paediatric Intensive Care, Children's Hospital, University Hospital Cologne, Kerpener Str. 62, 50937, Cologne, Germany
- Department of Business Administration and Health Care Management, University of Cologne, Albertus-Magnus Platz, 50923, Cologne, Germany
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Jütte L, Patel H, Roth B. Improved polarimetric analysis of human skin through stitching: advantages, limitations, and applications in dermatology. Biomed Phys Eng Express 2023; 10:015007. [PMID: 37988749 DOI: 10.1088/2057-1976/ad0e87] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/21/2023] [Indexed: 11/23/2023]
Abstract
Polarimetry is a powerful tool for the analysis of the optical properties of materials and systems, such as human skin. However, in many polarimetric setups, the field of view is limited to a few square centimeters. In these cases, it is possible to resort to stitching techniques, which involve combining multiple Mueller matrix measurements obtained from different overlapping regions of the sample. In this paper, we propose a stitching technique for polarimetric data and discuss its advantages and limitations. We also describe the potential of image stitching for improving the accuracy and robustness ofin vivopolarimetry in the presence of random patient movement. We conducted our research using a diverse set of samples which included porcine skin, human skin from arms and fingers, cold cuts of chicken and gelatine, alongside synthetically created sample data. Our results demonstrate the effectiveness of this technique for the application in dermatology. Each additionalin vivomeasurement enhances the field of view by approximately one third, thereby considerably augmenting the total observation area. We show that stitching enables for the polarimetric assessment of large skin patches which is useful for the diagnosis of inflammatory skin diseases.
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Affiliation(s)
- Lennart Jütte
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Germany
| | - Harshkumar Patel
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Germany
- PhoenixD, Leibniz University Hannover, Hannover, Germany
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Thangavelu K, Martakis K, Feldmann S, Roth B, Herkenrath P, Lang-Roth R. Universal Newborn Hearing Screening Program: 10-Year Outcome and Follow-Up from a Screening Center in Germany. Int J Neonatal Screen 2023; 9:61. [PMID: 37873852 PMCID: PMC10594500 DOI: 10.3390/ijns9040061] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023] Open
Abstract
Regular reporting of quality control is important in newborn hearing screening, ensuring early diagnosis and intervention. This study reports on a population-based newborn hearing screening program in North-Rhine, Germany and a hospital-based screening at a University Hospital for 2007-2016. The two-staged 'screening' and 'follow-up' program involving TEOAE and AABR recruited newborns through participating birth facilities. Results were sent to the regional tracking center, and the data were analyzed based on recommended benchmarks. The percentage of newborns from the participating birth facilities in the region increased from 1.4% in 2007 to 57.5% in 2016. The 10-year coverage rate for these newborns was 98.7%, the referral rate after a failed two-step screening was 3.4%, and the lost-to-follow-up rate was 1%. At the hospital, >95% of the screened newborns completed screening within 30 days, the 10-year referral rate was 5%, and 64% were referred within 3 months of age. The median time for screening completion was 6 days after birth, for referral it was 74 days after birth, and for diagnosis it was 55 days after birth. Regional-centralized tracking centers with uniform structure are necessary for proper quality control. Obligatory participation of birthing facilities and quality reports may improve performance, but the recommended quality criteria need considerable financial and infrastructural expenditure.
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Affiliation(s)
- Kruthika Thangavelu
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-University Marburg, Baldingerstrasse, 35043 Marburg, Germany
| | - Kyriakos Martakis
- Department of Pediatric Neurology, Social Pediatrics and Epileptology, Justus-Liebig-University Giessen and University Hospital Marburg Giessen, Feulgenstrasse 10–12, 35392 Giessen, Germany;
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, Kerpener Strasse 62, 50937 Cologne, Germany;
| | - Silke Feldmann
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany;
| | - Bernhard Roth
- Department of Neonatology, Faculty of Medicine, University Hospital Cologne, Kerpener Strasse 62, 50937 Cologne, Germany;
| | - Peter Herkenrath
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, Kerpener Strasse 62, 50937 Cologne, Germany;
| | - Ruth Lang-Roth
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany;
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Kukk AF, Scheling F, Panzer R, Emmert S, Roth B. Combined ultrasound and photoacoustic C-mode imaging system for skin lesion assessment. Sci Rep 2023; 13:17947. [PMID: 37864039 PMCID: PMC10589211 DOI: 10.1038/s41598-023-44919-5] [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: 08/09/2023] [Accepted: 10/13/2023] [Indexed: 10/22/2023] Open
Abstract
Accurate assessment of the size and depth of infiltration is critical for effectively treating and removing skin cancer, especially melanoma. However, existing methods such as skin biopsy and histologic examination are invasive, time-consuming, and may not provide accurate depth results. We present a novel system for simultaneous and co-localized ultrasound and photoacoustic imaging, with the application for non-invasive skin lesion size and depth measurement. The developed system integrates an acoustical mirror that is placed on an ultrasound transducer, which can be translated within a flexible water tank. This allows for 3D (C-mode) imaging, which is useful for mapping the skin structure and determine the invasion size and depth of lesions including skin cancer. For efficient reconstruction of photoacoustic images, we applied the open-source MUST library. The acquisition time per 2D image is <1 s and the pulse energies are below the legal Maximum Permissible Exposure (MPE) on human skin. We present the depth and resolution capabilities of the setup on several self-designed agar phantoms and demonstrate in vivo imaging on human skin. The setup also features an unobstructed optical window from the top, allowing for simple integration with other optical modalities. The perspective towards clinical application is demonstrated.
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Affiliation(s)
- Anatoly Fedorov Kukk
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Straße 17, 30167, Hannover, Germany.
| | - Felix Scheling
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Straße 17, 30167, Hannover, Germany
| | - Rüdiger Panzer
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Strempelstraße 13, 18057, Rostock, Germany
| | - Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Strempelstraße 13, 18057, Rostock, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Straße 17, 30167, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines), Welfengarten 1a, 30167, Hannover, Germany
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Thangavelu K, Martakis K, Feldmann S, Roth B, Lang-Roth R. Referral rate and false-positive rates in a hearing screening program among high-risk newborns. Eur Arch Otorhinolaryngol 2023; 280:4455-4465. [PMID: 37154942 PMCID: PMC10477105 DOI: 10.1007/s00405-023-07978-y] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 04/11/2023] [Indexed: 05/10/2023]
Abstract
AIM More studies exploring referral rates and false-positive rates are needed to make hearing screening programs in newborns better and cost-effective. Our aim was to study the referral and false-positivity rates among high-risk newborns in our hearing screening program and to analyze the factors potentially associated with false-positive hearing screening test results. METHODS A retrospective cohort study was done among the newborns hospitalized at a university hospital from January 2009 to December 2014 that underwent hearing screening with a two-staged AABR screening protocol. Referral rates and false-positivity rates were calculated and possible risk factors for false-positivity were analyzed. RESULTS 4512 newborns were screened for hearing loss in the neonatology department. The referral rate for the two-staged AABR-only screening was 3.8% with false-positivity being 2.9%. Our study showed that the higher the birthweight or gestational age of the newborn, the lower the odds of the hearing screening results being false-positive, and the higher the chronological age of the infant at the time of screening, the higher the odds of the results being false-positive. Our study did not show a clear association between the mode of delivery or gender and false-positivity. CONCLUSION Among high-risk infants, prematurity and low-birthweight increased the rate of false-positivity in the hearing screening, and the chronological age at the time of the test seems to be significantly associated with false-positivity.
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Affiliation(s)
- Kruthika Thangavelu
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, Baldingerstrasse, 35043, Marburg, Germany.
| | - Kyriakos Martakis
- Department of Pediatric Neurology, Social Pediatrics and Epileptology, Justus-Liebig-University Giessen and University Hospital Giessen, Feulgenstr. 10-12, 35392, Giessen, Germany
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
| | - Silke Feldmann
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
| | - Bernhard Roth
- Department of Neonatology, Faculty of Medicine and University Hospital Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
| | - Ruth Lang-Roth
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
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Wetzel C, Jansen-Olliges L, Stadler M, Surup F, Zeilinger C, Roth B. Analysis of SARS-CoV-2 spike RBD binding to ACE2 and its inhibition by fungal cohaerin C using surface enhanced Raman spectroscopy. Biomed Opt Express 2023; 14:4097-4111. [PMID: 37799683 PMCID: PMC10549735 DOI: 10.1364/boe.495685] [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] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/14/2023] [Accepted: 06/26/2023] [Indexed: 10/07/2023]
Abstract
The structure of the SARS-CoV-2 spike RBD and human ACE2 as well as changes in the structure due to binding activities were analysed using surface enhanced Raman spectroscopy. The inhibitor cohaerin C was applied to inhibit the binding between spike RBD and ACE2. Differences and changes in the Raman spectra were determined using deconvolution of the amide bands and principal component analysis. We thus demonstrate a fast and label-free analysis of the protein structures and the differentiation between bound and unbound states. The approach is suitable for sensing and screening and might be relevant to investigate other protein systems as well.
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Affiliation(s)
- Christoph Wetzel
- Leibniz University Hannover, Hannover Centre for Optical Technologies, Nienburger Str. 17, 30167 Hannover, Germany
| | - Linda Jansen-Olliges
- Leibniz University Hannover, Centre of Biomolecular Drug Research, Schneiderberg 38, 30167 Hannover, Germany
| | - Marc Stadler
- Helmholtz Centre for Infection Research GmbH, Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany
- Technische Universität Braunschweig, Institute of Microbiology, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Frank Surup
- Helmholtz Centre for Infection Research GmbH, Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany
- Technische Universität Braunschweig, Institute of Microbiology, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Carsten Zeilinger
- Leibniz University Hannover, Centre of Biomolecular Drug Research, Schneiderberg 38, 30167 Hannover, Germany
| | - Bernhard Roth
- Leibniz University Hannover, Hannover Centre for Optical Technologies, Nienburger Str. 17, 30167 Hannover, Germany
- Leibniz University Hannover, Cluster of Excellence PhoenixD, Welfenplatz 1, 30167 Hannover, Germany
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Wu D, Kukk AF, Roth B. Detection of Melanin Influence on Skin Samples Based on Raman Spectroscopy and Optical Coherence Tomography Dual-modal Approach. J Biophotonics 2023:e202300080. [PMID: 37166225 DOI: 10.1002/jbio.202300080] [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] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/26/2023] [Accepted: 05/02/2023] [Indexed: 05/12/2023]
Abstract
Melanoma is responsible for more than half of the deaths related to skin cancer in the last few decades. A dual-modality optical biopsy system with Raman spectroscopy and optical coherence tomography approach was built with the goal of achieving non-invasive skin measurement. To mimic melanoma and evaluate the effect of melanin on skin, models have been created by dissolving synthetic melanin in dimethyl sulfoxide and adding to fresh skin samples. Compared to the untreated samples, morphological images showed that the imaging depth on melanin-treated skin has been increased from 250 μm to 350 μm due to the optical clearing effect of the DMSO solvent, and Raman analysis revealed that relative spectral intensities of melanin-treated samples were lower in the amide-I and CH2 -deformation bands, and higher in the CH2 -twist and C-C stretch bands. Using machine learning for skin type classification, an accuracy of 89% is achieved. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Di Wu
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167, Hanover, Germany
| | - Anatoly Fedorov Kukk
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167, Hanover, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167, Hanover, Germany
- Cluster of Excellence PhoenixD, Leibniz University Hannover, Welfengarten 1, 30167, Hannover, Germany
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Roth B, Bothe TL, Patzak A, Pilz N. Validation of the ABPMpro ambulatory blood pressure monitor in the general population according to AAMI/ESH/ISO Universal Standard (ISO 81060-2:2018). Blood Press Monit 2023; 28:158-162. [PMID: 37016982 PMCID: PMC10132455 DOI: 10.1097/mbp.0000000000000640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2023]
Abstract
OBJECTIVE The objective of this study is to evaluate the accuracy of the oscillometric upper-arm device ABPMpro (SOMNOmedics) for ambulatory blood pressure measurement in the general population according to the Association for the Advancement of Medical Instrumentation/European Society of Hypertension/International Organization for Standardization (AAMI/ESH/ISO) Universal Standard (ISO 81060-2:2018) at rest and during dynamic exercise. METHODS Subjects were recruited to fulfill the age, sex, blood pressure (BP) and cuff distribution criteria of the AAMI/ESH/ISO standard using the same arm sequential BP measurement method. Three appropriate cuff sizes (18-24, 24-34 and 34-46 cm) of the tested device were used for the arm-varying circumferences. The inflation and deflation measurement modes of the ABPMpro were investigated. RESULTS For the general validation study, 100 subjects were recruited and 90 were analyzed. For validation criterion (1), the mean ± SD of the differences between ABPMpro and reference BP was 0.7 ± 7.3/-0.7 ± 5.8 mmHg (systolic/diastolic) for inflation and 1.4 ± 7.7/-0.6 ± 6.1 mmHg for deflation measurements. For criterion (2), the SD of the averaged BP differences per subject was 5.98/5.10 mmHg for inflation and 6.46/5.36 mmHg for deflation measurements, thereby passing the threshold. In the ambulatory validation study (N = 36), the mean difference was -1.2 ± 7.9/ 2.4 ± 6.6 mmHg for inflation and -0.7 ± 7.6/3.1 ± 7.0 mmHg for deflation measurements. CONCLUSION The ABPMpro device fulfilled the ISO 81060-2:2018 requirements in the general population and in the ambulatory setting and can therefore be recommended for clinical use.
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Affiliation(s)
| | - Tomas Lucca Bothe
- Institute of Translational Physiology, Charite - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Andreas Patzak
- Institute of Translational Physiology, Charite - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Niklas Pilz
- Institute of Translational Physiology, Charite - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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Crettenand F, Assayed Leonardi N, Martinez Carrique S, Roth B. Comparing continuous wound infiltration with thoracic epidural analgesia for postoperative pain management in open nephrectomy. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01054-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Schaer S, Rakauskas A, Valerio M, Roth B. A preliminary assessment of microultrasound performance in detecting clinically significant prostate cancer in the anterior prostate: An inter-reader evaluation. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01016-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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14
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Jütte L, Roth B. Mueller Matrix Microscopy for In Vivo Scar Tissue Diagnostics and Treatment Evaluation. Sensors (Basel) 2022; 22:9349. [PMID: 36502051 PMCID: PMC9740816 DOI: 10.3390/s22239349] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/28/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Scars usually do not show strong contrast under standard skin examination relying on dermoscopes. They usually develop after skin injury when the body repairs the damaged tissue. In general, scars cause multiple types of distress such as movement restrictions, pain, itchiness and the psychological impact of the associated cosmetic disfigurement with no universally successful treatment option available at the moment. Scar treatment has significant economic impact as well. Mueller matrix polarimetry with integrated autofocus and automatic data registration can potentially improve scar assessment by the dermatologist and help to make the evaluation of the treatment outcome objective. Polarimetry can provide new physical parameters for an objective treatment evaluation. We show that Mueller matrix polarimetry can enable strong contrast for in vivo scar imaging. Additionally, our results indicate that the polarization stain images obtained form there could be a useful tool for dermatology. Furthermore, we demonstrate that polarimetry can be used to monitor wound healing, which may help prevent scarring altogether.
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Affiliation(s)
- Lennart Jütte
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Straße 17, 30167 Hannover, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Straße 17, 30167 Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering—Innovation Across Disciplines), Welfengarten 1A, 30167 Hannover, Germany
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15
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Jütte L, Yang Z, Sharma G, Roth B. Focus stacking in non-contact dermoscopy. Biomed Phys Eng Express 2022; 8. [PMID: 36206663 DOI: 10.1088/2057-1976/ac9847] [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: 06/01/2022] [Accepted: 10/07/2022] [Indexed: 11/12/2022]
Abstract
Dermoscopy is the main tool for early detection of skin cancer. Non-contact dermoscopes often suffer from a small depth of field leading to images of skin topographies with regions that are not in focus. We aim to provide an easy-to-implement focus stacking-based approach to ensure all-in-focus images from a non-contact dermoscope. Further, we aim to extract additional information about the skin topography from the image stacks. The focus stacking procedure itself is implemented in a non-contact dermoscope with an electrically adjustable focus realized by using a tunable liquid lens. We show that all-in-focus imaging is possible for non-contact dermoscopy and deliver a method to extract topographical information for dermatologists from the acquired image stacks. Our finding indicate that the approach can be valuable for non-contact dermoscopic examination as well as for the early detection of skin diseases such as cancer as it possible to derive hyperfocus images and information on the skin topography. With this, we were able to develop a software for the acquisition of the raw image data and its processing into a high resolution hyperresolution dermoscopic image. In the next steps, we plan to apply the approach in the clinical environment for skin cancer diagnostics or imaging of inflammatory skin diseases.
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Affiliation(s)
- Lennart Jütte
- Hannover Centre for Optical Technologies, Nienburger Straße 17, Hannover, 30167, GERMANY
| | - Zhiyao Yang
- Hannover Centre for Optical Technologies, Nienburger Straße 17, Hannover, Hannover, 30167, GERMANY
| | - Gaurav Sharma
- Hannover Centre for Optical Technologies, Nienburger Straße 17, Hannover, Hannover, 30167, GERMANY
| | - Bernhard Roth
- Hannover Centre of Optical Technologies, Leibniz University Hannover, Leibniz University Hannover, Nienburger Str. 17, Hannover, 30167, GERMANY
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16
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Grilo N, Crettenand F, Dartiguenave F, Dias S, Blanc C, Roth B, Lucca I. Impact of ERAS® protocol compliance on length of stay, bowel recovery and complications after radical cystectomy. Clin Nutr ESPEN 2022. [DOI: 10.1016/j.clnesp.2022.06.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Fedorov Kukk A, Wu D, Gaffal E, Panzer R, Emmert S, Roth B. Multimodal system for optical biopsy of melanoma with integrated ultrasound, optical coherence tomography and Raman spectroscopy. J Biophotonics 2022; 15:e202200129. [PMID: 35802400 DOI: 10.1002/jbio.202200129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
We introduce a new single-head multimodal optical system that integrates optical coherence tomography (OCT), 18 MHz ultrasound (US) tomography and Raman spectroscopy (RS), allowing for fast (<2 min) and noninvasive skin cancer diagnostics and lesion depth measurement. The OCT can deliver structural and depth information of smaller skin lesions (<1 mm), while the US allows to measure the penetration depth of thicker lesions (≥4 mm), and the RS analyzes the chemical composition from a small chosen spot (≤300 μm) that can be used to distinguish between benign and malignant melanoma. The RS and OCT utilize the same scanning and optical setup, allowing for co-localized measurements. The US on the other side is integrated with an acoustical reflector, which enables B-mode measurements on the same position as OCT and RS. The US B-mode scans can be translated across the sample by laterally moving the US transducer, which is made possible by the developed adapter with a flexible membrane. We present the results on custom-made liquid and agar phantoms that show the resolution and depth capabilities of the setup, as well as preliminary ex vivo measurements on mouse models with ∼4.3 mm thick melanoma.
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Affiliation(s)
- Anatoly Fedorov Kukk
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Hannover, Germany
| | - Di Wu
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Hannover, Germany
| | | | | | | | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, Hannover, Germany
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines), Hannover, Germany
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18
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Jütte L, Sharma G, Patel H, Roth B. Registration of polarimetric images for in vivo skin diagnostics. J Biomed Opt 2022; 27:096001. [PMID: 36042549 PMCID: PMC9424913 DOI: 10.1117/1.jbo.27.9.096001] [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] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
SIGNIFICANCE Mueller matrix (MM) polarimetry is a promising tool for the detection of skin cancer. Polarimetric in vivo measurements often suffer from misalignment of the polarimetric images due to motion, which can lead to false results. AIM We aim to provide an easy-to-implement polarimetric image data registration method to ensure proper image alignment. APPROACH A feature-based image registration is implemented for an MM polarimeter for phantom and in vivo human skin measurements. RESULTS We show that the keypoint-based registration of polarimetric images is necessary for in vivo skin polarimetry to ensure reliable results. Further, we deliver an efficient semiautomated method for the registration of polarimetric images. CONCLUSIONS Image registration for in vivo polarimetry of human skin is required for improved diagnostics and can be efficiently enhanced with a keypoint-based approach.
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Affiliation(s)
- Lennart Jütte
- Leibniz University Hannover, Hannover Centre for Optical Technologies, Hannover, Germany
| | - Gaurav Sharma
- Leibniz University Hannover, Hannover Centre for Optical Technologies, Hannover, Germany
| | - Harshkumar Patel
- Leibniz University Hannover, Hannover Centre for Optical Technologies, Hannover, Germany
| | - Bernhard Roth
- Leibniz University Hannover, Hannover Centre for Optical Technologies, Hannover, Germany
- Leibniz University Hannover, Cluster of Excellence PhoenixD, Hannover, Germany
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19
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Göpel W, Kribs A, Roll C, Wieg C, Teig N, Hoehn T, Welzing L, Vochem M, Hoppenz M, Bührer C, Mehler K, Hubert M, Eichhorn J, Schmidtke S, Rausch TK, König IR, Härtel C, Roth B, Herting E. Multicentre randomised trial of invasive and less invasive surfactant delivery methods showed similar spirometry results at 5-9 years of age. Acta Paediatr 2022; 111:2108-2114. [PMID: 35896864 DOI: 10.1111/apa.16499] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 07/23/2022] [Accepted: 07/26/2022] [Indexed: 11/28/2022]
Abstract
AIM We explored whether subnormal forced expiratory volume within one second (FEV1 ) at 5-9 years of age was lower in children born preterm who received less invasive surfactant administration (LISA) rather than surfactant via an endotracheal tube. METHODS The multicentre, randomised Nonintubated Surfactant Application trial enrolled 211 preterm infants born at 23-26 weeks of gestation from 13 level III neonatal intensive care units from April 2009 to March 2012. They received surfactant via LISA (n=107) or after conventional endotracheal intubation (n=104). The follow-up assessments were carried out by a single team blinded to the group assignments. The main outcome was FEV1 <80% of predicted values. RESULTS Spirometry was successful in 102/121 children. The other children died or were lost to follow up. Median FEV1 was 93% (interquartile range 80-113%) of predicted values in the LISA group and 86% (interquartile range 77-102%) in the control group (p=0.685). Rates of FEV1 < 80% were 11/57 (19%) and 15/45 (33 %) respectively, which was an absolute risk reduction of 14% (95% confidence interval -3.1% to 31.2%, p=0.235). There were no differences in other outcome measures. CONCLUSION The proportion of children aged 5-9 years with subnormal FEV1 was not significantly different between the groups.
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Affiliation(s)
- W Göpel
- Department of Paediatrics, University Hospital of Schleswig-Holstein, University of Lübeck, Lübeck, Germany
| | - A Kribs
- Department of Paediatrics, Faculty of Medicine and University Hospital of Cologne, Cologne, Germany
| | - C Roll
- Department of Neonatology, Vest Children's Hospital Datteln, University Witten-Herdecke, Datteln, Germany
| | - C Wieg
- Children's Hospital Aschaffenburg-Alzenau, Aschaffenburg, Germany
| | - N Teig
- Department of Neonatology, University Children's Hospital, Ruhr University Bochum, Bochum, Germany
| | - T Hoehn
- Department of General Paediatrics, University Hospital Düsseldorf, Düsseldorf, Germany
| | - L Welzing
- Department of Paediatrics, Hospital Köln-Porz, Germany
| | - M Vochem
- Olgahospital Stuttgart, Stuttgart, Germany
| | - M Hoppenz
- Department of Neonatology and Paediatric Intensive Care Medicine, Children's Hospital, Cologne, Germany
| | - C Bührer
- Department of Neonatology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - K Mehler
- Department of Paediatrics, Faculty of Medicine and University Hospital of Cologne, Cologne, Germany
| | - M Hubert
- Department of Neonatology and Paediatric Intensive Care, DRK-Children's Hospital, Siegen, Germany
| | - J Eichhorn
- Children's Hospital Leverkusen, Leverkusen, Germany
| | - S Schmidtke
- Department of Neonatology, Asklepios Klinik Barmbek, Hamburg, Germany
| | - T K Rausch
- Institute of Medical Biometry and Statistics, University of Lübeck, Germany
| | - I R König
- Institute of Medical Biometry and Statistics, University of Lübeck, Germany
| | - C Härtel
- Children's Hospital, University of Würzburg, Würzburg, Germany
| | - B Roth
- Department of Paediatrics, Faculty of Medicine and University Hospital of Cologne, Cologne, Germany
| | - E Herting
- Department of Paediatrics, University Hospital of Schleswig-Holstein, University of Lübeck, Lübeck, Germany
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20
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Martel P, Rakauskas A, Dagher J, La Rosa S, Meuwly JY, Roth B, Valerio M. The benefit of adopting Microultrasound in the prostate cancer imaging pathway: A lesion-by-lesion analysis: Biopsies prostatiques guidée par micro-échographie, quel bénéfice ? Une analyse lésion par lésion. Prog Urol 2022; 32:6S26-6S32. [PMID: 36719643 DOI: 10.1016/s1166-7087(22)00172-5] [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] [Indexed: 02/03/2023]
Abstract
INTRODUCTION - Microultrasound (MicroUS) is a novel imaging modality relying on a high-frequency transducer which confers a three-fold improvement in spatial resolution as compared with conventional transrectal ultrasound. We evaluated the diagnostic value of MRI-MicroUS fusion biopsy and determined the additional benefit of employing MicroUS. METHODS - Retrospective analysis of consecutive treatment-naïve men undergoing MRI-MicroUS fusion biopsy between May 2018 and March 2019. Pre-biopsy MRI was systematically reviewed in a dedicated meeting where suspicious lesions PIRADS ≥ 3 were registered and uploaded in the ExactVu MicroUS device. MRI and MicroUS lesions were individually marked in a PIRADS v2 scheme. The biopsy protocol included MRI-MicroUS fusion and MicroUS targeted biopsies; systematic biopsies were performed at clinician's discretion. The diagnostic value was evaluated in terms of detection rate of clinically significant prostate cancer, defined as Gleason pattern ≥ 4 at histology. RESULTS - In all, 148 patients with a median age of 69 years (IQR 63-74) and median PSA density of 0.16 ng/ml/cc (0.10-0.23) were included. Clinically significant cancer was detected in 42.5% (63/148) patients. MRI detected 89 lesions in the peripheral zone; 73% (65/89) were visible on MicroUS. Clinically significant cancer was detected in 46.1% (30/65) MRI and MicroUS visible lesions, and in 4.2% (1/24) lesions only visible on mpMRI. MicroUS additionally identified 35 suspicious lesions non-visible on MRI of which clinically significant cancer was present in 25.7% (9/35). CONCLUSION - Adding MicroUS to the conventional pathway seems to increase the detection rate of clinically significant disease in unselected men undergoing biopsy. © 2022 Elsevier Masson SAS. All rights reserved.
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Affiliation(s)
- P Martel
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland
| | - A Rakauskas
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland
| | - J Dagher
- Institute of Pathology, Lausanne University Hospital, Lausanne, Switzerland
| | - S La Rosa
- Institute of Pathology, Lausanne University Hospital, Lausanne, Switzerland; Pathology Unit, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - J Y Meuwly
- Department of Radiology, Lausanne University Hospital, Lausanne, Switzerland
| | - B Roth
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland
| | - M Valerio
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland.
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21
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Fedorov Kukk A, Blumenröther E, Roth B. Self-made transparent optoacoustic detector for measurement of skin lesion thickness in vivo. Biomed Phys Eng Express 2022; 8. [PMID: 35413695 DOI: 10.1088/2057-1976/ac669b] [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: 11/17/2021] [Accepted: 04/12/2022] [Indexed: 11/11/2022]
Abstract
In skin cancer diagnosis and treatment, one of the key factors is tumor depth, which is connected to the severity and the required excision depth. Optoacoustical (OA) imaging is a relatively popular technique that provides information based on the optical absorption of the sample. Although often demonstrated withex vivomeasurements orin vivoimaging on parts of small animals,in vivomeasurements on humans are more challenging. This is presumably because it is too time consuming and the required excitation pulse energies and their number exceed the allowed maximum permissible exposure (MPE). Here, we demonstrate thickness measurements with a transparent optoacoustical detector of different suspicious skin lesionsin vivoon patients. We develop the signal processing technique to automatically convert the raw signal into thickness via deconvolution with the impulse response function. The transparency of the detector allows optical excitation with the pulsed laser to be performed perpendicularly on the lesion, in contrast to the conventional illumination from the side. For validation, the measured results were compared to the histological thickness determined after excision. We show that this simple transparent detector allows to determine the thickness of a lesion and thus, aid the dermatologist to estimate the excision depth in the future.
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Affiliation(s)
- Anatoly Fedorov Kukk
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167 Hannover, Germany
| | - Elias Blumenröther
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167 Hannover, Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167 Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics and Engineering - Innovation Across Disciplines), Welfengarten 1a, 30167 Hannover, Germany
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22
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Martel P, Rakauskas A, Dagher J, La Rosa S, Meuwly JY, Roth B, Valerio M. WITHDRAWN: The benefit of adopting Microultrasound in the prostate cancer imaging pathway : A lesion-by-lesion analysis. Prog Urol 2022:S1166-7087(22)00066-5. [PMID: 35292179 DOI: 10.1016/j.purol.2022.02.005] [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: 01/12/2022] [Revised: 02/08/2022] [Accepted: 02/17/2022] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Microultrasound (MicroUS) is a novel imaging modality relying on a high-frequency transducer which confers a three-fold improvement in spatial resolution as compared with conventional transrectal ultrasound. We evaluated the diagnostic value of MRI-MicroUS fusion biopsy and determined the additional benefit of employing MicroUS. METHODS Retrospective analysis of consecutive treatment-naïve men undergoing MRI-MicroUS fusion biopsy between May 2018 and March 2019. Pre-biopsy MRI was systematically reviewed in a dedicated meeting where suspicious lesions PIRADS≥3 were registered and uploaded in the ExactVu MicroUS device. MRI and MicroUS lesions were individually marked in a PIRADS v2 scheme. The biopsy protocol included MRI-MicroUS fusion and MicroUS targeted biopsies; systematic biopsies were performed at clinician's discretion. The diagnostic value was evaluated in terms of detection rate of clinically significant prostate cancer, defined as Gleason pattern≥4 at histology. RESULTS In all, 148 patients with a median age of 69 years (IQR 63-74) and median PSA density of 0.16ng/ml/cc (0.10-0.23) were included. Clinically significant cancer was detected in 42.5% (63/148) patients. MRI detected 89 lesions in the peripheral zone; 73% (65/89) were visible on MicroUS. Clinically significant cancer was detected in 46.1% (30/65) MRI and MicroUS visible lesions, and in 4.2% (1/24) lesions only visible on mpMRI. MicroUS additionally identified 35 suspicious lesions non-visible on MRI of which clinically significant cancer was present in 25.7% (9/35). CONCLUSION Adding MicroUS to the conventional pathway seems to increase the detection rate of clinically significant disease in unselected men undergoing biopsy.
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Affiliation(s)
- P Martel
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland
| | - A Rakauskas
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland
| | - J Dagher
- Institute of Pathology, Lausanne University Hospital, Lausanne, Switzerland
| | - S La Rosa
- Institute of Pathology, Lausanne University Hospital, Lausanne, Switzerland; Pathology Unit, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - J Y Meuwly
- Department of Radiology, Lausanne University Hospital, Lausanne, Switzerland
| | - B Roth
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland
| | - M Valerio
- Department of Urology, Lausanne University Hospital, Lausanne, Switzerland.
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23
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Bosshard P, Tsaturyan A, Bokova E, Bonny O, Stritt K, Roth B. The impact of stenting prior to oral chemolysis of upper urinary tract uric acid stones. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00340-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Becker A, Fricke D, Roth B, Glasmacher B. Assuring Quality of Scaffolds in Musculoskeletal Tissue Engineering. Current Directions in Biomedical Engineering 2021. [DOI: 10.1515/cdbme-2021-2046] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
In order to achieve the high quality required in medical products, reliable characterization methods and quality management systems are necessary. In the field of musculoskeletal Tissue Engineering (mTE), electrospinning is utilized to manufacture fibre scaffolds as implant material. Depending on the application, in this case the regeneration of tendon-bone junctions, properties like the degree of fibre orientation, homogeneity of fibre throughout the scaffold and reaction to external mechanical load are of particular importance. Currently, destructive methods, like scanning electron microscopy (SEM), are widely used to determine these properties. In addition to the destruction of the samples, these methods often only allow the investigation of very small sections. In this study, we present two new methods for the fast, non-destructive and contactless characterization of electrospun fibre scaffolds for mTE. These methods are based on Transillumination Imaging (TI) and Mueller Matrix Polarimetry (MMP), utilizing low-power laser sources or LED light sources, respectively, to determine the relative homogeneity (TI) and the degree of fibre orientation (MMP) in electrospun fibre scaffolds.
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Affiliation(s)
- Alexander Becker
- Leibniz University Hannover, Institute for Multiphase Processes (IMP), An der Universität 1, Garbsen , Germany
| | - Dierk Fricke
- Leibniz University Hannover, Hannover Centre for Optical Technologies (HOT), Hannover , Germany
| | - Bernhard Roth
- Leibniz University Hannover, Hannover Centre for Optical Technologies (HOT), Hannover , Germany
| | - Birgit Glasmacher
- Leibniz University Hannover, Institute for Multiphase Processes (IMP), An der Universität 1, Garbsen , Germany
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25
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Beichert L, Binhammer Y, Andrade JRC, Mevert R, Kniggendorf AK, Roth B, Morgner U. Real-time stimulated Raman spectroscopy with a non-collinear optical parametric oscillator. Opt Express 2021; 29:31499-31507. [PMID: 34615241 DOI: 10.1364/oe.436318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
Ultrafast detection of microplastic particles is becoming a vital problem, as these particles are found in water sources worldwide. Ideally, a live analysis in flow is desirable to directly monitor the water quality for contaminations. Therefore, coherent Raman spectroscopy techniques require fast and broadband tunable lasers to address all relevant spectral regions of the investigated samples. In our work, we combine a high power non-collinear optical parametric oscillator with a real-time stimulated Raman scattering spectroscopy setup. The light source is continously tunable from 700 nm to 1030 nm in less than 10 ms, delivering an average output power of more than 500 mW with sub-ps pulses. We show the immediate observation of mixing processes and the detection of microplastic particles in water solution with a spectral window of more than 2000 cm-1.
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26
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Deppe AC, Kolibay F, Burst V, Simon S, Rothschild M, Kochanek M, Annecke T, Adler C, Dusse F, Hof M, Langebartels G, Reimers S, Muckel S, Roth B, Wolff J, Onur OA. [Prioritization of intensive medical treatment places - Concept proposal]. Chirurg 2021; 92:822-829. [PMID: 33404665 PMCID: PMC7786159 DOI: 10.1007/s00104-020-01334-0] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2020] [Indexed: 11/16/2022]
Abstract
In the situation of a shortage of ventilation beds, ethically justifiable, transparent and comprehensible decisions must be made. This concept proposes that all patients are first intubated depending on necessity and then assessed by a triage team afterwards. In this situation newly admitted COVID patients compete with newly admitted Non-COVID patients as well as patients already treated in intensive care units for a ventilator. The combination of short-term and long-term prognoses should enable the interprofessional triage team to make comprehensible decisions. The aim of the prioritization concept is to save as many human lives as possible and to relieve the treatment team of the difficult decision on prioritization.
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Affiliation(s)
- A C Deppe
- Herzchirurgische Intensivstation, Klinik und Poliklinik für Herzchirurgie, herzchirurgische Intensivmedizin und Thoraxchirurgie, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland.
| | - F Kolibay
- Katastrophenschutzbeauftragter, Stabsabteilung Klinikangelegenheiten und Krisenmanagement des Ärztlichen Direktors, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - V Burst
- Zentrale Notaufnahme, Klinik II für Innere Medizin: Nephrologie, Rheumatologie, Diabetologie und Allgemeine Innere Medizin, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - S Simon
- Zentrum für Palliativmedizin, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - M Rothschild
- Institut für Rechtmedizin, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - M Kochanek
- Internistische Intensivstation, Klinik I für Innere Medizin: Hämatologie und Onkologie, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - T Annecke
- Anästhesiologische Intensivstation, Klinik für Anästhesiologie und operative Intensivmedizin, Universität zu Köln, Medizinische Fakultät und Klinikum der Universität zu Witten/Herdecke, Kliniken Köln, Köln, Deutschland
| | - C Adler
- Kardiologische Intensivstation, Klinik III für Innere Medizin: Allgemeine und interventionelle Kardiologie, Elektrophysiologie, Angiologie, Pneumologie und internistische Intensivmedizin, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - F Dusse
- Anästhesiologische Intensivstation, Klinik für Anästhesiologie und operative Intensivmedizin, Universität zu Köln, Medizinische Fakultät und Klinikum der Universität zu Witten/Herdecke, Kliniken Köln, Köln, Deutschland
| | - M Hof
- Neurochirurgische Intensivstation, Klinik und Poliklinik für allgemeine Neurochirurgie, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - G Langebartels
- Ärztlicher Koordinator Intensivmedizin, Stabsabteilung Klinikangelegenheiten und Krisenmanagement des Ärztlichen Direktors, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - S Reimers
- Pflegedienstleitung Intensivpflege, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - S Muckel
- Juristische Fakultät, Öffentliches Recht und Religionsrecht, Institute für Religionsrecht, Universität zu Köln, Köln, Deutschland
| | - B Roth
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - J Wolff
- Katholische Seelsorge, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
| | - O A Onur
- Neurologische Intensivstation, Klinik und Poliklinik für Neurologie, Universität zu Köln, Medizinische Fakultät und Uniklinik, Köln, Deutschland
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Zheng L, Zywietz U, Birr T, Duderstadt M, Overmeyer L, Roth B, Reinhardt C. UV-LED projection photolithography for high-resolution functional photonic components. Microsyst Nanoeng 2021; 7:64. [PMID: 34567776 PMCID: PMC8433360 DOI: 10.1038/s41378-021-00286-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 05/28/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
The advancement of micro- and nanostructuring techniques in optics is driven by the demand for continuous miniaturization and the high geometrical accuracy of photonic devices and integrated systems. Here, UV-LED projection photolithography is demonstrated as a simple and low-cost approach for rapid generation of two-dimensional optical micro- and nanostructures with high resolution and accuracy using standard optics only. The developed system enables the projection of structure patterns onto a substrate with 1000-fold demagnification. Photonic devices, e.g., waveguides and microring resonators, on rigid or flexible substrates with varied geometrical complexity and overall structure dimensions from the nanometer to centimeter scale were successfully prepared. In particular, high-resolution gratings with feature sizes down to 150 nm and periods as small as 400 nm were realized for the first time by this approach. Waveguides made of doped laser active materials were fabricated, and their spontaneous emission was detected. The demonstrated superior performance of the developed approach may find wide applications in photonics, plasmonics, and optical materials science, among others.
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Affiliation(s)
- Lei Zheng
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Lower Saxony 30167 Germany
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines), Hannover, Lower Saxony 30167 Germany
| | - Urs Zywietz
- Laser Zentrum Hannover e.V, Hannover, Lower Saxony 30167 Germany
| | - Tobias Birr
- Laser Zentrum Hannover e.V, Hannover, Lower Saxony 30167 Germany
| | | | - Ludger Overmeyer
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines), Hannover, Lower Saxony 30167 Germany
- Institute of Transport and Automation Technology, Leibniz University Hannover, Garbsen, Lower Saxony 30823 Germany
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Lower Saxony 30167 Germany
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines), Hannover, Lower Saxony 30167 Germany
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Cloitre M, Valerio M, Roth B, Berthold D, Tawadros T, Meuwly J, Heym L, Duclos F, Viguet-Carrin S, Vallet V, Bourhis J, Herrera F. PD-0764 Quality of life, toxicity, and PSA control after 50 Gy SBRT to the dominant intraprostatic nodule. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07043-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Moschella P, Roth B, LeMatty A, Falconer R, Mousavi E, Nafchi A, Ashley N, DesJardins J. 22 Flow and Pressure Differential Results of a Novel Low-Cost Portable Negative Pressure Patient Enclosure For COVID-19. Ann Emerg Med 2021. [PMCID: PMC8335526 DOI: 10.1016/j.annemergmed.2021.07.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Rakauskas A, Peters M, Martel P, La Rosa S, Meuwly JY, Roth B, Valerio M. Tranperineal vs. transrectal micro-ultrasound and mpMRI targeted prostate biopsies: propensity score-matched study. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01324-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Assadian O, Golling M, Krüger CM, Leaper D, Mutters NT, Roth B, Kramer A. Surgical site infections: guidance for elective surgery during the SARS-CoV-2 pandemic - international recommendations and clinical experience. J Hosp Infect 2021; 111:189-199. [PMID: 33600892 PMCID: PMC7883712 DOI: 10.1016/j.jhin.2021.02.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/10/2021] [Accepted: 02/10/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND The COVID-19 pandemic not only had an impact on public life and healthcare facilities in general, but also affected established surgical workflows for elective procedures. The strategy to protect patients and healthcare workers from infection by SARS-CoV-2 in surgical departments has needed step-by-step development. Based on the evaluation of international recommendations and guidelines, as well as personal experiences in a clinical 'hot spot' and in a 450-bed surgical clinic, an adapted surgical site infection (SSI) prevention checklist was needed to develop concise instructions, which described roles and responsibilities of healthcare professionals that could be used for wider guidance in pandemic conditions. METHOD Publications of COVID-19-related recommendations and guidelines, produced by health authorities and organizations, such as WHO, US-CDC, ECDC, the American College of Surgery and the Robert Koch Institute, were retrieved, assessed and referenced up to 31st January 2020. Additionally, clinical personal experiences in Germany were evaluated and considered. RESULTS Part 1 of this guidance summarizes the experience of a tertiary care, surgical centre which utilized redundant hospital buildings for immediate spatial separation in a 'hot spot' COVID-19 area. Part 2 outlines the successful screening and isolation strategy in a surgical clinic in a region of Germany with outbreaks in surrounding medical centres. Part 3 provides the synopsis of personal experiences and international recommendations suggested for implementation during the COVID-19 pandemic. CONCLUSION Understanding of COVID-19, and SARS-CoV-2-related epidemiology, is constantly and rapidly changing, requiring continuous adaptation and re-evaluation of recommendations. Established national and local guidelines for continuation of surgical services and prevention of SSI require ongoing scrutiny and focused implementation. This manuscript presents a core facility checklist to support medical institutions to continue their clinical and surgical work during the COVID-19 pandemic.
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Affiliation(s)
- O Assadian
- Regional Hospital Wiener Neustadt, Austria; Institute for Skin Integrity and Infection Prevention, University of Huddersfield, UK
| | - M Golling
- Surgical Clinic I, Diakonie-Klinikum Schwäbisch Hall gGmbH, Germany
| | - C M Krüger
- Immanuel Klinikum Rüdersdorf, Department of Surgery, Center for Robotics, Rüdersdorf b. Berlin, Germany
| | - D Leaper
- Department of Surgery, University of Newcastle upon Tyne, UK; Department of Clinical Sciences, ISIaIP, University of Huddersfield, Huddersfield, UK
| | - N T Mutters
- Institute for Hygiene and Public Health, Bonn University Hospital, Bonn, Germany; CEOsys Network of the National University Medicine Research Network on Covid-19 (NUM)
| | - B Roth
- Surgical Clinic, District Hospital Belp/Switzerland, FMH for General and Trauma Surgery, Wattenwil, Switzerland
| | - A Kramer
- Institute of Hygiene and Environmental Medicine, University Medicine Greifswald, Germany; CEOsys Network of the National University Medicine Research Network on Covid-19 (NUM).
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Mensen A, Roth B, Kuntz L, Wittland M, Glöckner V, Miedaner F. What matters most and for whom? A cross-sectional study exploring goals of health professionals in German neonatal intensive care units. BMJ Open 2021; 11:e044031. [PMID: 33753440 PMCID: PMC7986904 DOI: 10.1136/bmjopen-2020-044031] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES Quality of care largely depends on successful teamwork, which in turn needs effective communication between health professionals. To communicate successfully in a team, health professionals need to strive for the same goals. However, it has been left largely unaddressed which goals professionals consider to be important. In this study, we aim to identify these goals and analyse whether differences between (1) personal and organisational goals, (2) different professions and (3) hierarchical levels exist in neonatal intensive care units (NICUs). DESIGN Goals were identified based on a literature review and a workshop with health professionals and tested in a pilot study. Subsequently, in the main study, a cross-sectional employee survey was undertaken. SETTING AND PARTICIPANTS 1489 nurses and 537 physicians from 66 German NICUs completed the questionnaire regarding personal and organisational goal importance between May and July 2013. Answers were given based on a 7-point Likert scale varying between none and exceptionally high importance. RESULTS Results show that the goals can be subdivided into three main goal dimensions: patients, parents and staff. Furthermore, our results reveal significant differences between different professions and different hierarchical level: physicians rated patient goals with a mean (95% CI) importance of 6.37 (3.32 to 6.43), which is significantly higher than nurses with a mean (95% CI) importance of 6.15 (6.12 to 6.19) (p<0.01). Otherwise, nurses classified parental goals as more important (p<0.01). Furthermore, professionals in leading positions rate patient goals significantly higher than professionals that are not in leading positions (6.36 (3.28 to 6.44) vs 6.19 (6.15 to 6.22), p<0.01). CONCLUSIONS Different employee goals need to be considered in decision-making processes to enhance employee motivation and the effectiveness of teamwork. TRIAL REGISTRATION NUMBER DRKS00004589.
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Affiliation(s)
- Anne Mensen
- Department of Health Economics, RWI - Leibniz Institute for Economic Research, Essen, Germany
- Ruhr-University Bochum, Bochum, Germany
| | - Bernhard Roth
- Department of Neonatology and Pediatric Intensive Care, Children's Hospital, University Hospital Cologne, Cologne, Germany
- Department of Business Administration and Healthcare Management, University of Cologne, Cologne, Germany
| | - Ludwig Kuntz
- Department of Business Administration and Healthcare Management, University of Cologne, Cologne, Germany
| | - Michael Wittland
- Department for Nursing and Health Care, Hannover University of Applied Sciences and Arts, Hannover, Germany
| | - Verena Glöckner
- Department of Business Administration and Healthcare Management, University of Cologne, Cologne, Germany
| | - Felix Miedaner
- Faculty of Public Health Services, Ostfalia University of Applied Sciences - Campus Wolfsburg, Wolfsburg, Germany
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Kniggendorf AK, Nogueira R, Lorey C, Roth B. Calcium carbonate deposits and microbial assemblages on microplastics in oligotrophic freshwaters. Chemosphere 2021; 266:128942. [PMID: 33220990 DOI: 10.1016/j.chemosphere.2020.128942] [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] [Received: 08/25/2020] [Revised: 11/06/2020] [Accepted: 11/08/2020] [Indexed: 06/11/2023]
Abstract
Microplastics are solid polymer particles with a wide variety of surface properties, found in most waterbodies, and known as carriers of distinct microbial communities affecting the fate of the particles in the environment. Little is known about the formation of mineral deposits on microplastics and how these deposits connect to microbial assemblages and affect the physicochemical properties of the particles. In addition, most of the available research on this topic is based on large microplastics with sizes between 100 μm and up to 5 mm, rather than the small microplastics often found in drinking water sources. To narrow this gap in our understanding of environmental effects on small microplastics, two types of small microplastics made of two distinct polymers, poly(methyl methacrylate) (PMMA) and poly(tetrafluoroethylene) (PTFE) with sizes ranging from 15 to 150 μm, were incubated for six months in unprocessed and processed drinking water with increasing ionic concentration to allow for the formation of mineral deposits and microbial assemblages. Spatially resolved analysis with fluorescent in situ hybridization and confocal Raman microscopic imaging revealed deposits of calcium carbonates and scattered microbial assemblages on all microplastics, with structure, extend, and microbial association with the carbonates depending on the respective microplastic. Notably, PTFE floatation was overcome after three months in unprocessed drinking water but remained unchanged in processed drinking water, whereas PMMA appeared unaffected, indicating that the fate of microplastics in the environment may depend on polymer type and the encountered aquatic conditions forming mineral and microbial attachments to the particle surface.
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Affiliation(s)
- Ann-Kathrin Kniggendorf
- Hannover Centre for Optical Technologies, Gottfried Wilhelm Leibniz Universität Hannover, Nienburger Str. 17, 30167, Hannover, Germany.
| | - Regina Nogueira
- Institute for Sanitary Engineering and Waste Management, Gottfried Wilhelm Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany.
| | - Corinna Lorey
- Institute for Sanitary Engineering and Waste Management, Gottfried Wilhelm Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany.
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Gottfried Wilhelm Leibniz Universität Hannover, Nienburger Str. 17, 30167, Hannover, Germany; Cluster of Excellence PhoenixD, Gottfried Wilhelm Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany.
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Mehler K, Broer A, Roll C, Göpel W, Wieg C, Jahn P, Teig N, Höhn T, Welzing L, Vochem M, Hoppenz M, Bührer C, Franklin J, Roth B, Herting E, Kribs A. Developmental outcome of extremely preterm infants is improved after less invasive surfactant application: Developmental outcome after LISA. Acta Paediatr 2021; 110:818-825. [PMID: 32892376 DOI: 10.1111/apa.15565] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [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: 03/20/2020] [Revised: 07/16/2020] [Accepted: 08/31/2020] [Indexed: 11/29/2022]
Abstract
AIM The aim of this study was to evaluate neurocognitive outcome at 24 months of corrected age after less invasive surfactant application (LISA) in preterm infants born at 23-26 weeks of gestational age. METHODS Surviving participants of a LISA trial conducted in 13 German level III neonatal intensive care units were reviewed for assessment of developmental outcome, hearing and vision problems, growth and rehospitalisation days. Maternal depression, breastfeeding rates and socio-economic factors were evaluated as potentially confounding factors. RESULTS In total, 156/182 infants took part in the study, 78 had received surfactant via LISA and 78 via endotracheal intubation. 22% of LISA infants compared to 42% of intubated infants had a psychomotor development index (PDI) <70 (0.012). A significant difference in mental development index (MDI) was observed in the stratum of more mature infants (25 and 26 weeks of GA). For this group, MDI < 70 was observed in 4% of LISA infants vs 21% of intubated infants (P = 0.008). CONCLUSION At 24 months of age, the LISA-treated infants scored less often PDI < 70 and had similar results in MDI. Infants born at 25 and 26 weeks treated with LISA had lower rates of severe disability. LISA is safe and may be superior.
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Affiliation(s)
- Katrin Mehler
- Department of Pediatrics University of Cologne Cologne Germany
| | - Alexander Broer
- Department of Pediatrics University of Cologne Cologne Germany
| | - Claudia Roll
- Department of Neonatology Vest Children's Hospital Datteln University Witten‐Herdecke Witten‐Herdecke Germany
| | - Wolfgang Göpel
- Department of Pediatrics University of Lübeck Lübeck Germany
| | - Christian Wieg
- Department of Neonatology Klinikum Aschaffenburg Aschaffenburg Germany
| | - Peter Jahn
- Department of Neonatology Children's Hospital Leverkusen Leverkusen Germany
| | - Norbert Teig
- Department of Neonatology Children's Hospital Ruhr‐University Bochum Bochum Germany
| | - Thomas Höhn
- Department of General Pediatrics University Hospital Düsseldorf Düsseldorf Germany
| | - Lars Welzing
- Department of Neonatology University of Bonn Bonn Germany
| | - Matthias Vochem
- Department of Neonatology Olga Hospital Stuttgart Stuttgart Germany
| | - Marc Hoppenz
- Department of Neonatology and Pediatric Intensive Care Medicine Children's Hospital Cologne Germany
| | - Christoph Bührer
- Department of Neonatology Charité University Medical Center Berlin Germany
| | - Jeremy Franklin
- Institute of Medical Statistics and Computational Biology University of Cologne Cologne Germany
| | - Bernhard Roth
- Department of Pediatrics University of Cologne Cologne Germany
| | - Egbert Herting
- Department of Pediatrics University of Lübeck Lübeck Germany
| | - Angela Kribs
- Department of Pediatrics University of Cologne Cologne Germany
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Roth B, Jouve E, Daguzan A, Richardson A, Sambuc R, Bernard O, Lagouanelle-Simeoni MC. Descriptive study of young disabled children aged 2-6, enrolled in mainstream schools, and benefiting from special needs assistants in the Bouches-du-Rhône in 2014. Arch Pediatr 2020; 28:39-46. [PMID: 33309119 DOI: 10.1016/j.arcped.2020.10.005] [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] [Received: 09/04/2019] [Revised: 06/22/2020] [Accepted: 10/31/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Since the law of February 11, 2005, in France, the number of children with disabilities enrolled in ordinary schools has increased steadily. As a result, the amount of personal support provided by a special needs assistant (personal support) is also increasing. The aim of the study was to describe the diseases and impairments of disabled children aged 2-6, enrolled in mainstream schools and benefiting from personal support for schooling by special needs assistants in the Bouches-du-Rhône (France) in 2014. METHODS A cross-sectional descriptive study was performed. Children included were benefiting from either an individual or shared personal support. Physicians from the territorial organization in charge of disability coded diseases and deficiencies using the International Classification of Diseases, 10th revision, and nomenclature inspired by the International Classification of Functioning, Disability and Health. RESULTS Medical data were coded for 990 children out of 1260 of the total population. These young disabled children were most frequently children with pervasive developmental disorders (23.3%), lack of expected normal physiological development (19.9%), or mixed specific developmental disorders (13.5%), and most often had behavioral, personality, and relational skills disorders (61.8%), psychomotor function impairments (51.9%), or written or oral language learning impairment (43.2%). Finally, the two main types of impairments most represented among these children were psychological impairments (86.7%) and language and speech impairments (79.8%). The children were most often supported by an individual personal support (for one child only) than by a shared personal support (60% vs. 40%). They were mainly boys (almost 75%). CONCLUSION This study provides working guidelines for the management of health policies relating to disability at the territorial or even national level.
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Affiliation(s)
- B Roth
- Service d'évaluation médicale, APHM, Hôpital Conception, 13005 Marseille, France.
| | - E Jouve
- Service d'évaluation médicale, APHM, Hôpital Conception, 13005 Marseille, France
| | - A Daguzan
- Service d'évaluation médicale, APHM, Hôpital Conception, 13005 Marseille, France; Aix Marseille Université, Laboratoire de Psychologie Sociale (LPS), 13100 Aix-en-Provence, France
| | - A Richardson
- MDPH (Maison Départementale des Personnes Handicapées), Conseil Général des Bouches-du-Rhône, 4, quai d'Arenc, 13304 Marseille, France
| | - R Sambuc
- Aix Marseille Université, CEReSS (Centre d'Études et de Recherche sur les Services de Santé et la Qualité de Vie), 13385 Marseille, France
| | - O Bernard
- PMI (Protection Maternelle et Infantile), Conseil Départemental des Bouches-du-Rhône, 4, quai d'Arenc, 13304 Marseille, France
| | - M C Lagouanelle-Simeoni
- Service d'évaluation médicale, APHM, Hôpital Conception, 13005 Marseille, France; Aix Marseille Université, Laboratoire de Psychologie Sociale (LPS), 13100 Aix-en-Provence, France
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Kanngiesser J, Roth B. Wavefront Shaping Concepts for Application in Optical Coherence Tomography-A Review. Sensors (Basel) 2020; 20:E7044. [PMID: 33316998 PMCID: PMC7763956 DOI: 10.3390/s20247044] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/02/2020] [Accepted: 12/07/2020] [Indexed: 01/10/2023]
Abstract
Optical coherence tomography (OCT) enables three-dimensional imaging with resolution on the micrometer scale. The technique relies on the time-of-flight gated detection of light scattered from a sample and has received enormous interest in applications as versatile as non-destructive testing, metrology and non-invasive medical diagnostics. However, in strongly scattering media such as biological tissue, the penetration depth and imaging resolution are limited. Combining OCT imaging with wavefront shaping approaches significantly leverages the capabilities of the technique by controlling the scattered light field through manipulation of the field incident on the sample. This article reviews the main concepts developed so far in the field and discusses the latest results achieved with a focus on signal enhancement and imaging.
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Affiliation(s)
- Jonas Kanngiesser
- Hannoversches Zentrum für Optische Technologien, Leibniz Universität Hannover, Nienburger Straße 17, D-30167 Hannover, Germany;
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering–Innovation Across Disciplines), D-30167 Hannover, Germany
| | - Bernhard Roth
- Hannoversches Zentrum für Optische Technologien, Leibniz Universität Hannover, Nienburger Straße 17, D-30167 Hannover, Germany;
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering–Innovation Across Disciplines), D-30167 Hannover, Germany
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Hucklenbruch-Rother E, Vohlen C, Mehdiani N, Keller T, Roth B, Kribs A, Mehler K. Delivery room skin-to-skin contact in preterm infants affects long-term expression of stress response genes. Psychoneuroendocrinology 2020; 122:104883. [PMID: 33027708 DOI: 10.1016/j.psyneuen.2020.104883] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 08/27/2019] [Revised: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 11/27/2022]
Abstract
Premature birth is a traumatic event that puts mother and child at risk for subsequent psychopathology. Skin-to-skin contact in the form of intermittent kangaroo mother care has been shown to positively affect the infant's stress response and cognitive development, but underlying mechanisms remain unclear. Moreover, first skin-to-skin contact is usually delayed for days after birth. In the delivery room skin-to-skin study (DR-SSC), a prospective randomized controlled trial conducted from 2/2012 to 7/2015, we set out to assess the effect of delivery room skin-to-skin contact on the infant's mRNA expression of six key molecules involved in stress response and neurobehavioral development at hospital discharge. 88 firstborn, singleton preterm infants (born at 25-32 weeks of gestational age) were included. In the delivery room after initial stabilization, infants were randomized to either 60 min of skin-to-skin or 5 min of visual contact with their mother. In this explorative add-on study on the original DR-SSC study, we determined the expression of six important stress response genes (CRHR1 and CRHR2, AVP, NR3C1, HTR2A, and SLC6A4) in peripheral white blood cells of infants during routine blood sampling upon hospital discharge (corrected gestational age of 40 weeks). Infants were followed up to six months corrected age. Relative mRNA expression of the corticotropin releasing hormone receptor 2 (CRH R2), the glucocorticoid receptor gene (NR3C1), and the serotonin transporter gene (SLC6A4) was significantly reduced in the delivery room SSC infants. Additionally, gene expression of CRH R2 showed a correlation with HPA axis reactivity and parameters of mother-child interaction at six months corrected age. Our results highlight the importance of delivery room mother-child skin-to-skin contact and underline the urgent need for in-depth studies on the underlying molecular mechanisms.
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Affiliation(s)
- Eva Hucklenbruch-Rother
- Metabolism and Perinatal Programming, Children's Hospital, University of Cologne, Cologne, Germany.
| | - Christina Vohlen
- Metabolism and Perinatal Programming, Children's Hospital, University of Cologne, Cologne, Germany
| | - Nava Mehdiani
- Division of Neonatology, Children's Hospital, University of Cologne, Cologne, Germany
| | - Titus Keller
- Division of Neonatology, Children's Hospital, University of Cologne, Cologne, Germany
| | - Bernhard Roth
- Division of Neonatology, Children's Hospital, University of Cologne, Cologne, Germany
| | - Angela Kribs
- Division of Neonatology, Children's Hospital, University of Cologne, Cologne, Germany
| | - Katrin Mehler
- Division of Neonatology, Children's Hospital, University of Cologne, Cologne, Germany
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Mehler K, Giebisch C, Abele J, Roth B, Huenseler C. Pain response to vaccination in newborn infants of diabetic mothers. Early Hum Dev 2020; 149:105139. [PMID: 32763751 DOI: 10.1016/j.earlhumdev.2020.105139] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/16/2020] [Accepted: 07/20/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND Response to pain is altered in infants who were exposed to pain- and stressful events in the neonatal period. Infants of diabetic mothers receive several heel sticks after birth for measuring blood glucose and thus may show changes in their behavioral and physiologic response to pain. Moreover, maternal hyperglycemia may alter activity of the hypothalamic pituitary adrenal (HPA) axis reactivity. STUDY DESIGN In total, 43 infants of diabetic mothers and 30 control infants were included into the study. Response to pain was assessed at 3 months of age following two intramuscular injections for vaccination. We assessed behavioral (Bernese pain scale), physiologic (heart rate) and hormonal (salivary cortisol) pain response to vaccination as well as spinal sensitization (flexion withdrawal reflex). RESULTS Infants of diabetic mothers received a median number of 5 [4-19] painful events compared to 1 [1-3] in the control group. Heart rate reactivity differed significantly between groups. Infants of diabetic mothers had higher peaks (p = 0.002) and needed more time to recover to baseline (p < 0.001). Moreover, infants of diabetic mothers showed higher peak cortisol (p = 0.001) and a higher relative cortisol increase (p = 0.015). Flexor withdrawal reflex thresholds were significantly lower in infants of diabetic mothers (p = 0.003). CONCLUSION The increase of physiologic and hormonal responses to pain in infants of diabetic mothers is probably caused by repeated painful events and an altered metabolic profile.
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Affiliation(s)
- Katrin Mehler
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany.
| | - Christina Giebisch
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany
| | - Julia Abele
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany
| | - Bernhard Roth
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany
| | - Christoph Huenseler
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany
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Pichl T, Keller T, Hünseler C, Roth B, Janoschek R, Appel S, Hucklenbruch-Rother E. Effects of ketamine on neurogenesis, extracellular matrix homeostasis and proliferation in hypoxia-exposed HT22 murine hippocampal neurons. Biomed Rep 2020; 13:23. [PMID: 32765862 PMCID: PMC7403805 DOI: 10.3892/br.2020.1330] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 05/14/2020] [Indexed: 12/15/2022] Open
Abstract
Ketamine is a widely used drug in pediatric anesthesia, and both neurotoxic and neuroprotective effects have been associated with its use. There are only a few studies to date which have examined the effects of ketamine on neurons under hypoxic conditions, which may lead to severe brain damage and poor neurocognitive outcomes in neonates. In the present study, the effects of ketamine on cellular pathways associated with neurogenesis, extracellular matrix homeostasis and proliferation were examined in vitro in hypoxia-exposed neurons. Differentiated HT22 murine hippocampal neurons were treated with 1, 10 and 20 µM ketamine and cultured under hypoxic or normoxic conditions for 24 h followed by quantitative PCR analysis of relevant candidate genes. Ketamine treatment did not exert any notable effects on the mRNA expression levels of markers of neurogenesis (neuronal growth factor and syndecan 1), extracellular matrix homeostasis (matrix-metalloproteinase 2 and 9, tenascin C and tenascin R) or proliferation markers (Ki67 and proliferating cell nuclear antigen) compared with the respective untreated controls. However, there was a tendency towards downregulation of multiple cellular markers under hypoxic conditions and simultaneous ketamine treatment. No dose-dependent association was found in the ketamine treated groups for genetic markers of neurogenesis, extracellular matrix homeostasis or proliferation. Based on the results, ketamine may have increased the vulnerability of hippocampal neurons in vitro to hypoxia, independent of the dose. The results of the present study contribute to the ongoing discussion on the safety concerns around ketamine use in pediatric clinical practice from a laboratory perspective.
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Affiliation(s)
- Thomas Pichl
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
| | - Titus Keller
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
| | - Christoph Hünseler
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
| | - Bernhard Roth
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
| | - Ruth Janoschek
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
| | - Sarah Appel
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
| | - Eva Hucklenbruch-Rother
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Faculty of Medicine and University Hospital, D-50931 Cologne, Germany
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Rentsch C, Thalmann G, Lucca I, Kwiatkowski M, Wirth G, Strebel R, Engeler D, Pedrazzini A, Hüttenbrink C, Schultze-Seemann W, Bubendorf L, Wicki A, Roth B, Bosshard P, Püschel H, Boll D, Hefermehl L, Roghmann F, Gierth M, Schäfer S, Hayoz S. Results of a phase II single arm clinical trial assessing efficacy, safety and tolerability of the recombinant Bacillus Calmette Guérin (BCG) VPM1002BC in patients with BCG failure - SAKK 06/14. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33377-2] [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: 11/17/2022] Open
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Kanngiesser J, Roth B. Effect of image artefacts on phase conjugation with spectral domain optical coherence tomography. Opt Express 2020; 28:18224-18240. [PMID: 32680023 DOI: 10.1364/oe.393259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
Recently the acquisition of the time-resolved reflection matrix was demonstrated based on spectral domain optical coherence tomography. In principle, the matrix describes the linear dependence of the OCT signal received from different depths on the field which is incident to the scattering sample. Knowledge of the matrix, hence, enables beam shaping to selectively enhance the received signal, for example to increase the penetration depth when imaging turbid media. We investigate the impact of image artefacts on the approach. Phase conjugation is shown to enhance the OCT signal, but not autocorrelation and mirror artefacts. Imaging applications are demonstrated indicating the potential for future in-vivo studies on biotissues.
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Mehler K, Hucklenbruch‐Rother E, Trautmann‐Villalba P, Becker I, Roth B, Kribs A. Delivery room skin-to-skin contact for preterm infants-A randomized clinical trial. Acta Paediatr 2020; 109:518-526. [PMID: 31423649 DOI: 10.1111/apa.14975] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [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: 09/19/2018] [Revised: 06/25/2019] [Accepted: 08/16/2019] [Indexed: 01/21/2023]
Abstract
AIM To investigate the effects of 60 minutes delivery room skin-to-skin contact (DR-SSC) compared with 5 minutes visual contact (VC) on mother-child interaction (MCI), salivary cortisol, maternal depression, stress and bonding at 6 months corrected age. METHODS A single-centre randomized controlled trial conducted in a German level III NICU. Eighty-eight preterm infants (25-32 weeks of gestational age) were randomized after initial stabilization to either 60 minutes DR-SSC or 5 minutes VC. Forty-five infants were allocated to DR-SSC, 43 to VC. RESULTS Delivery room skin-to-skin contact dyads showed a higher quantity of maternal motoric (18 vs 15, P = .030), infant's vocal (7 vs 5, P = .044) and motoric (20 vs 15, P = .032) responses. Moreover, the combined score of maternal and infant responsive behaviour was higher (86 vs 71, P = .041) in DR-SSC dyads. DR-SSC mothers had lower risk of both, early postpartum depression (15% vs 45%, P = .003) and impaired bonding (Score 3 vs 5, P = .031). CONCLUSION In addition to regular intermittent kangaroo mother care, DR-SSC promotes MCI and decreases risk of maternal depression and bonding problems. Thus, DR-SSC may have positive effects on preterm development.
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Affiliation(s)
- Katrin Mehler
- Division of Neonatology Children's Hospital University of Cologne Cologne Germany
| | - Eva Hucklenbruch‐Rother
- Research group of Metabolism and Perinatal Programming Children's Hospital University of Cologne Cologne Germany
| | | | - Ingrid Becker
- Institute of Medical Statistics, Informatics, and Epidemiology University of Cologne Cologne Germany
| | - Bernhard Roth
- Division of Neonatology Children's Hospital University of Cologne Cologne Germany
| | - Angela Kribs
- Division of Neonatology Children's Hospital University of Cologne Cologne Germany
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Herting E, Kribs A, Härtel C, von der Wense A, Weller U, Hoehn T, Vochem M, Möller J, Wieg C, Roth B, Göpel W. Two-year outcome data suggest that less invasive surfactant administration (LISA) is safe. Results from the follow-up of the randomized controlled AMV (avoid mechanical ventilation) study. Eur J Pediatr 2020; 179:1309-1313. [PMID: 32067100 PMCID: PMC7351829 DOI: 10.1007/s00431-020-03572-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/20/2019] [Accepted: 01/08/2020] [Indexed: 12/29/2022]
Abstract
Less invasive surfactant administration (LISA) is a method to deliver surfactant to spontaneously breathing premature infants via a thin catheter. Here we report the two-year outcome from the AMV (avoid mechanical ventilation) study, the first randomized controlled trial on this mode of surfactant delivery. No statistically significant differences in weight, length or neurodevelopmental outcome (Bayley II scores) were found between the LISA intervention group (n = 95) and the control group (n = 84) that received standard treatment.Conclusion: No differences in outcome were observed at 2 years. LISA seems safe in that aspect. What is Known: • LISA is a method that is in increasing use for surfactant delivery to spontaneously breathing infants. LISA reduces the need for mechanical ventilation. What is New: • Outcome data at 2 years from the first randomized study with LISA raise no safety concerns in comparison to a group of infants that received standard treatment.
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Affiliation(s)
- Egbert Herting
- Department of Paediatrics, University Hospital of Schleswig-Holstein, University of Lübeck, Ratzeburger Allee 160, D-23538, Lübeck, Germany.
| | - Angela Kribs
- Department of Neonatology, University of Cologne, Cologne, Germany
| | - Christoph Härtel
- Department of Paediatrics, University Hospital of Schleswig-Holstein, University of Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany
| | - Axel von der Wense
- Department of Neonatology, Children’s Hospital Hamburg-Altona, Hamburg, Germany
| | - Ursula Weller
- Department of Paediatrics, Evangelical Klinikum Bethel, Bielefeld, Germany
| | - Thomas Hoehn
- Department of Paediatrics, University of Düsseldorf, Düsseldorf, Germany
| | - Matthias Vochem
- Department of Neonatology, Olgahospital Stuttgart, Stuttgart, Germany
| | - Jens Möller
- Department of Paediatrics, Saarbrücken General Hospital, Saarbrücken, Germany
| | - Christian Wieg
- Germany Children’s Hospital Aschaffenburg-Alzenau, Aschaffenburg, Germany
| | - Bernhard Roth
- Department of Neonatology, University of Cologne, Cologne, Germany
| | - Wolfgang Göpel
- Department of Paediatrics, University Hospital of Schleswig-Holstein, University of Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany
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Paz T, Bloom A, Roth B, Kalish Y, Rottenstreich A, Elchalal U. Pharmacomechanical Catheter Thrombolysis for Pregnancy-Related Proximal Deep Venous Thrombosis: Prevention of Post-Thrombotic Syndrome. J Vasc Surg Venous Lymphat Disord 2020. [DOI: 10.1016/j.jvsv.2019.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Suar M, Melchert O, Rahlves M, Roth B. Experimental and theoretical study of the formation process of photopolymer based self-written waveguides. Opt Express 2019; 27:38326-38336. [PMID: 31878601 DOI: 10.1364/oe.27.038326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 11/03/2019] [Indexed: 06/10/2023]
Abstract
The realization of optical interconnects between multimode (MM) optical fibers and waveguides based on a self-writing process in photopolymer media represents an efficient approach for fast and easy-to-implement connection of light-guiding elements. When light propagates through photopolymer media, it modulates the material properties of the media and confines the spreading of the light beam to create a waveguide along the beam propagation direction. This self-writing process can be realized with a single photopolymer medium and is also suited to connect optical fibers or waveguides with active elements such as light sources and detectors. Numerical simulations of the underlying light-induced polymerization process is carried out by using a diffusion based material model which takes account both monomer diffusion and its conversion to polymer chains in regions exposed to light fields. In this work experimental results obtained from a one-polymer approach are validated with theoretical predictions from the diffusion model. The study involved the demonstration of temporal dynamics and transmittance from self-written waveguide (SWW) couplers during the self-writing process. The measured attenuation coefficient from experiment αexperiment = (8.43 ± 0.3) × 10-5 dB/µm showed good agreement with the theoretically predicted attenuation coefficient αsimulation = 7.93 × 10-5 dB/µm, thus demonstrating a successful application of the diffusion model to epoxy based acrylate SWWs. For comparison, attenuation measurements between optical fibers with SWWs as interconnects and one without SWW, i.e. with an air gap in between, were performed. The obtained results reveal that the theoretical approach correctly describes the waveguide formation process so that in the next step the studies can be extended towards including further relevant parameters such as temperature.
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Melchert O, Willms S, Bose S, Yulin A, Roth B, Mitschke F, Morgner U, Babushkin I, Demircan A. Soliton Molecules with Two Frequencies. Phys Rev Lett 2019; 123:243905. [PMID: 31922846 DOI: 10.1103/physrevlett.123.243905] [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] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 09/23/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate a peculiar mechanism for the formation of bound states of light pulses of substantially different optical frequencies, in which pulses are strongly bound across a vast frequency gap. This is enabled by a propagation constant with two separate regions of anomalous dispersion. The resulting soliton compound exhibits moleculelike binding energy, vibration, and radiation and can be understood as a mutual trapping providing a striking analogy to quantum mechanics. The phenomenon constitutes an intriguing case of two light waves mutually affecting and controlling each other.
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Affiliation(s)
- Oliver Melchert
- Cluster of Excellence PhoenixD, Welfengarten 1, 30167, Hannover, Germany
- Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
- Hannover Centre for Optical Technologies, Nienburger Strasse 17, 30167, Hannover, Germany
| | - Stephanie Willms
- Cluster of Excellence PhoenixD, Welfengarten 1, 30167, Hannover, Germany
- Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
| | - Surajit Bose
- Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
| | - Alexey Yulin
- Department of Nanophotonics and Metamaterials, ITMO University, 197101 Saint Petersburg, Russia
- Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavik, Iceland
| | - Bernhard Roth
- Cluster of Excellence PhoenixD, Welfengarten 1, 30167, Hannover, Germany
- Hannover Centre for Optical Technologies, Nienburger Strasse 17, 30167, Hannover, Germany
| | - Fedor Mitschke
- Institute for Physics, University of Rostock, 18059 Rostock, Germany
| | - Uwe Morgner
- Cluster of Excellence PhoenixD, Welfengarten 1, 30167, Hannover, Germany
- Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
- Hannover Centre for Optical Technologies, Nienburger Strasse 17, 30167, Hannover, Germany
| | - Ihar Babushkin
- Cluster of Excellence PhoenixD, Welfengarten 1, 30167, Hannover, Germany
- Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
| | - Ayhan Demircan
- Cluster of Excellence PhoenixD, Welfengarten 1, 30167, Hannover, Germany
- Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
- Hannover Centre for Optical Technologies, Nienburger Strasse 17, 30167, Hannover, Germany
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Prante M, Schüling T, Roth B, Bremer K, Walter J. Characterization of an Aptamer Directed against 25-Hydroxyvitamin D for the Development of a Competitive Aptamer-Based Assay. Biosensors (Basel) 2019; 9:E134. [PMID: 31766203 PMCID: PMC6956098 DOI: 10.3390/bios9040134] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 12/22/2022]
Abstract
Detection of the small molecule 25-hydroxyvitamin D (25(OH)D) as the most relevant marker for vitamin D supply suffers from a high variability of results using the current detection methods, such as high-performance liquid chromatography (HPLC) and immunoassays. A new detection approach using a highly specific aptamer directed against 25(OH)D was established in this study based on the target-induced dissociation (TID) sensing approach. In this work, the aptamer was investigated regarding its structural properties as well as its binding affinity by using microscale thermophoresis (MST). Moreover, complementary oligonucleotides were designed based on the aptamer structure and were evaluated in MST experiments. Binding experiments of immobilized aptamers were conducted in microarray experiments. It could be shown that the aptamer exhibited the usual B-DNA structure and did not form any G-quadruplexes. The design of complementary oligonucleotides for the TID assay identified a putative 25(OH)D binding site within the aptamer. The limit of detection of the established competitive assay was determined to be 5.4 nM, which sets the stage for the development of a biosensor system.
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Affiliation(s)
- Marc Prante
- Institute of Technical Chemistry, Leibniz University of Hannover, 30167 Hannover, Germany; (M.P.); (T.S.)
| | - Torsten Schüling
- Institute of Technical Chemistry, Leibniz University of Hannover, 30167 Hannover, Germany; (M.P.); (T.S.)
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167 Hannover, Germany; (B.R.); (K.B.)
- Cluster of Excellence PhoenixD, (Photonics, Optics, and Engineering—Innovation Across Disciplines), 30167 Hannover, Germany
| | - Kort Bremer
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167 Hannover, Germany; (B.R.); (K.B.)
| | - Johanna Walter
- Institute of Technical Chemistry, Leibniz University of Hannover, 30167 Hannover, Germany; (M.P.); (T.S.)
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Heratizadeh A, Fricke D, Meinhardt-Wollweber M, Roth B, Werfel T. Non-contact remote digital dermoscopy - new perspectives on differential diagnosis of inflammatory skin diseases. J Eur Acad Dermatol Venereol 2019; 34:e125-e126. [PMID: 31710132 DOI: 10.1111/jdv.16056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- A Heratizadeh
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - D Fricke
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Germany
| | - M Meinhardt-Wollweber
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Germany
| | - B Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Hannover, Germany
| | - T Werfel
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
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Thangavelu K, Martakis K, Fabian S, Venkateswaran M, Roth B, Beutner D, Lang‐Roth R. Prevalence and risk factors for hearing loss in high-risk neonates in Germany. Acta Paediatr 2019; 108:1972-1977. [PMID: 31074050 DOI: 10.1111/apa.14837] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 02/11/2019] [Accepted: 05/06/2019] [Indexed: 11/29/2022]
Abstract
AIM Hearing loss in infants is often diagnosed late, despite universal screening programmes. Risk factors of hearing impairment in high-risk neonates, identified from population-based studies, can inform policy around targeted screening. Our aim was to determine the prevalence and the risk factors of hearing loss in a high-risk neonatal population. METHODS This was a retrospective cohort study of neonates hospitalised at the University Hospital Cologne, Germany from January 2009 to December 2014 and were part of the newborn hearing screening programme. Multivariable regression analyses using the lasso approach was performed. RESULTS Data were available for 4512 (43% female) neonates with a mean gestational age at birth of 35.5 weeks. The prevalence of hearing loss was 1.6%, and 42 (0.9%) neonates had permanent hearing loss. Craniofacial anomalies, hyperbilirubinaemia requiring exchange transfusion, oxygen supplementation after 36 weeks of gestation and hydrops fetalis showed associations with permanent hearing loss. CONCLUSION Our findings of risk factors for hearing loss were consistent with other studies. However, some commonly demonstrated risk factors such as perinatal infections, meningitis, sepsis and ototoxic drugs did not show significant associations in our cohort. Targeted screening based on risk factors may help early identification of hearing loss in neonates.
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Affiliation(s)
- Kruthika Thangavelu
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital of Marburg University of Gießen and Marburg Marburg Germany
| | - Kyriakos Martakis
- Department of International Health, CAPHRI ‐ Care and Public Health Research Institute Maastricht University Maastricht The Netherlands
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany
| | - Silke Fabian
- Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne Cologne Germany
| | - Mahima Venkateswaran
- Global Health Cluster, Division for Health Services Norwegian Institute of Public Health Oslo Norway
| | - Bernhard Roth
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany
| | - Dirk Beutner
- Department of Otorhinolaryngology, Head and Neck Surgery University of Göttingen Göttingen Germany
| | - Ruth Lang‐Roth
- Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne Cologne Germany
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Harada Y, Takahashi H, Trusheim H, Roth B, Mizuta K, Hirata-Saito A, Ogane T, Odagiri T, Tashiro M, Yamamoto N. Comparison of suspension MDCK cells, adherent MDCK cells, and LLC-MK2 cells for selective isolation of influenza viruses to be used as vaccine seeds. Influenza Other Respir Viruses 2019; 14:204-209. [PMID: 31651085 PMCID: PMC7040968 DOI: 10.1111/irv.12694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/28/2019] [Accepted: 10/01/2019] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Cell-based influenza vaccines can solve the problem of the frequent occurrence of egg adaptation-associated antigenic changes observed in egg-based vaccines. Seed viruses for cell-based vaccines can be prepared from clinical specimens by cell culture; however, clinical samples risk harboring respiratory viruses other than influenza virus. Therefore, it is necessary to investigate the patterns of co-infection in clinical samples and explore whether cell culture technology can selectively propagate influenza viruses from samples containing other respiratory viruses. METHODS A total of 341 clinical specimens were collected from patients with influenza or influenza-like illness and analyzed by ResPlex II assay to detect 18 respiratory viruses. The patterns of co-infection were statistically analyzed with Fisher's exact test. The samples with double or triple infections were passaged in suspension MDCK cells (MDCK-S), adherent MDCK cells (MDCK-A), and LLC-MK2D cells. Cell-passaged samples were analyzed by ResPlex II assay again to investigate whether each cell line could amplify influenza viruses and eliminate other respiratory viruses. RESULTS Double infections were detected in 8.5% and triple infections in 0.9% of the collected clinical specimens. We identified four pairs of viruses with significant correlation. For all samples with double and triple infection, MDCK-S and MDCK-A could selectively propagate influenza viruses, while eliminating all contaminating viruses. In contrast, LLC-MK2D showed lower isolation efficiency for influenza virus and higher isolation efficiency for coxsackievirus/echovirus than MDCK-S and MDCK-A. CONCLUSIONS Both MDCK-S and MDCK-A are considered suitable for the preparation of influenza vaccine seed viruses without adventitious agents or egg-adaptation mutations.
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Affiliation(s)
- Yuichi Harada
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hitoshi Takahashi
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Heidi Trusheim
- Novartis Vaccines and Diagnostics GmbH, Marburg, Germany
| | - Bernhard Roth
- Novartis Vaccines and Diagnostics GmbH, Marburg, Germany
| | - Katsumi Mizuta
- Yamagata Prefectural Institute of Public Health, Yamagata, Japan
| | - Asumi Hirata-Saito
- Tochigi Prefectural Institute of Public Health and Environmental Science, Utsunomiya, Japan
| | - Teruko Ogane
- Tochigi Prefectural Institute of Public Health and Environmental Science, Utsunomiya, Japan
| | - Takato Odagiri
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masato Tashiro
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Norio Yamamoto
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan.,Department of Infection Control Science, Graduate School of Medicine, Juntendo University, Tokyo, Japan
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