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Mueller-Graf F, Frenkel P, Merz J, Reuter S, Vollmar B, Tusman G, Pulletz S, Böhm SH, Zitzmann A, Reuter DA, Adler A. Respiratory gating improves correlation between pulse wave transit time and pulmonary artery pressure in experimental pulmonary hypertension. Physiol Meas 2024; 45:03NT02. [PMID: 38422512 DOI: 10.1088/1361-6579/ad2eb5] [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: 07/17/2023] [Accepted: 02/29/2024] [Indexed: 03/02/2024]
Abstract
Objective. Since pulse wave transit time (PWTT) shortens as pulmonary artery pressure (PAP) increases it was suggested as a potential non-invasive surrogate for PAP. The state of tidal lung filling is also known to affect PWTT independently of PAP. The aim of this retrospective analysis was to test whether respiratory gating improved the correlation coefficient between PWTT and PAP.Approach. In each one of five anesthetized and mechanically ventilated pigs two high-fidelity pressure catheters were placed, one directly behind the pulmonary valve, and the second one in a distal branch of the pulmonary artery. PAP was raised using the thromboxane A2 analogue U46619 and animals were ventilated in a pressure controlled mode (I:E ratio 1:2, respiratory rate 12/min, tidal volume of 6 ml kg-1). All signals were recorded using the multi-channel platform PowerLab®. The arrival of the pulse wave at each catheter tip was determined using a MATLAB-based modified hyperbolic tangent algorithm and PWTT calculated as the time interval between these arrivals.Main results. Correlation coefficient for PWTT and mean PAP wasr= 0.932 for thromboxane. This correlation coefficient increased considerably when heart beats either at end-inspiration (r= 0.978) or at end-expiration (r= 0.985) were selected (=respiratory gating).Significance. The estimation of mean PAP from PWTT improved significantly when taking the respiratory cycle into account. Respiratory gating is suggested to improve for the estimation of PAP by PWTT.
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Affiliation(s)
- Fabian Mueller-Graf
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, D-18057 Rostock, Germany
| | - Paul Frenkel
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
| | - Jonas Merz
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
| | - Susanne Reuter
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, D-18057 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, D-18057 Rostock, Germany
| | - Gerardo Tusman
- Department of Anesthesiology, Hospital Privado de Comunidad, Mar del Plata, Buenos Aires, Argentina
| | - Sven Pulletz
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
| | - Stephan H Böhm
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
| | - Amelie Zitzmann
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
| | - Daniel A Reuter
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, D-18057 Rostock, Germany
| | - Andy Adler
- Systems and Computer Engineering, Carleton University, Ottawa, Canada
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Boeckmann L, Berner J, Kordt M, Lenz E, Schäfer M, Semmler ML, Frey A, Sagwal SK, Rebl H, Miebach L, Niessner F, Sawade M, Hein M, Ramer R, Grambow E, Seebauer C, von Woedtke T, Nebe B, Metelmann HR, Langer P, Hinz B, Vollmar B, Emmert S, Bekeschus S. Synergistic effect of cold gas plasma and experimental drug exposure exhibits skin cancer toxicity in vitro and in vivo. J Adv Res 2024; 57:181-196. [PMID: 37391038 PMCID: PMC10918357 DOI: 10.1016/j.jare.2023.06.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 10/28/2022] [Revised: 06/09/2023] [Accepted: 06/27/2023] [Indexed: 07/02/2023] Open
Abstract
INTRODUCTION Skin cancer is often fatal, which motivates new therapy avenues. Recent advances in cancer treatment are indicative of the importance of combination treatments in oncology. Previous studies have identified small molecule-based therapies and redox-based technologies, including photodynamic therapy or medical gas plasma, as promising candidates to target skin cancer. OBJECTIVE We aimed to identify effective combinations of experimental small molecules with cold gas plasma for therapy in dermato-oncology. METHODS Promising drug candidates were identified after screening an in-house 155-compound library using 3D skin cancer spheroids and high content imaging. Combination effects of selected drugs and cold gas plasma were investigated with respect to oxidative stress, invasion, and viability. Drugs that had combined well with cold gas plasma were further investigated in vascularized tumor organoids in ovo and a xenograft mouse melanoma model in vivo. RESULTS The two chromone derivatives Sm837 and IS112 enhanced cold gas plasma-induced oxidative stress, including histone 2A.X phosphorylation, and further reduced proliferation and skin cancer cell viability. Combination treatments of tumor organoids grown in ovo confirmed the principal anti-cancer effect of the selected drugs. While one of the two compounds exerted severe toxicity in vivo, the other (Sm837) resulted in a significant synergistic anti-tumor toxicity at good tolerability. Principal component analysis of protein phosphorylation profiles confirmed profound combination treatment effects in contrast to the monotherapies. CONCLUSION We identified a novel compound that, combined with topical cold gas plasma-induced oxidative stress, represents a novel and promising treatment approach to target skin cancer.
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Affiliation(s)
- Lars Boeckmann
- Clinic and Polyclinic for Dermatology and Venereology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Julia Berner
- Department of Oral, Maxillofacial, and Plastic Surgery, Greifswald University Medical Center, 17475 Greifswald, Germany; ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany
| | - Marcel Kordt
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany
| | - Elea Lenz
- Institute for Pharmacology and Toxicology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Mirijam Schäfer
- Clinic and Polyclinic for Dermatology and Venereology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Marie-Luise Semmler
- Clinic and Polyclinic for Dermatology and Venereology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Anna Frey
- Institute for Chemistry, Rostock University, 18059 Rostock, Germany
| | - Sanjeev Kumar Sagwal
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany
| | - Henrike Rebl
- Department of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Lea Miebach
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany
| | - Felix Niessner
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany
| | - Marie Sawade
- Department of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Martin Hein
- Institute for Chemistry, Rostock University, 18059 Rostock, Germany
| | - Robert Ramer
- Institute for Pharmacology and Toxicology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Eberhard Grambow
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany
| | - Christian Seebauer
- Department of Oral, Maxillofacial, and Plastic Surgery, Greifswald University Medical Center, 17475 Greifswald, Germany
| | - Thomas von Woedtke
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany
| | - Barbara Nebe
- Department of Cell Biology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Hans-Robert Metelmann
- Department of Oral, Maxillofacial, and Plastic Surgery, Greifswald University Medical Center, 17475 Greifswald, Germany
| | - Peter Langer
- Institute for Chemistry, Rostock University, 18059 Rostock, Germany
| | - Burkhard Hinz
- Institute for Pharmacology and Toxicology, Rostock University Medical Center, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany
| | - Steffen Emmert
- Clinic and Polyclinic for Dermatology and Venereology, Rostock University Medical Center, 18057 Rostock, Germany.
| | - Sander Bekeschus
- Clinic and Polyclinic for Dermatology and Venereology, Rostock University Medical Center, 18057 Rostock, Germany; ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany.
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Schweins M, Gäbel R, Raitza M, Vasudevan P, Lemcke H, Joksch M, Schildt A, Kurth J, Lindner T, Meinel FG, Öner A, Ince H, Vollmar B, Krause BJ, David R, Lang CI. Multi-modal assessment of a cardiac stem cell therapy reveals distinct modulation of regional scar properties. J Transl Med 2024; 22:187. [PMID: 38378655 PMCID: PMC10880233 DOI: 10.1186/s12967-024-04986-2] [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: 01/14/2024] [Accepted: 02/12/2024] [Indexed: 02/22/2024] Open
Abstract
BACKGROUND The initial idea of functional tissue replacement has shifted to the concept that injected cells positively modulate myocardial healing by a non-specific immune response of the transplanted cells within the target tissue. This alleged local modification of the scar requires assessment of regional properties of the left ventricular wall in addition to commonly applied measures of global morphological and functional parameters. Hence, we aimed at investigating the effect of cardiac cell therapy with cardiovascular progenitor cells, so-called cardiac induced cells, on both global and regional properties of the left ventricle by a multimodal imaging approach in a mouse model. METHODS Myocardial infarction was induced in mice by ligation of the left anterior descending artery, the therapy group received an intramyocardial injection of 1 × 106 cardiac induced cells suspended in matrigel, the control group received matrigel only. [18F]FDG positron emission tomography imaging was performed after 17 days, to assess regional glucose metabolism. Three weeks after myocardial infarction, cardiac magnetic resonance imaging was performed for morphological and functional assessment of the left ventricle. Following these measurements, hearts were excised for histological examinations. RESULTS Cell therapy had no significant effect on global morphological parameters. Similarly, there was no difference in scar size and capillary density between therapy and control group. However, there was a significant improvement in contractile function of the left ventricle - left ventricular ejection fraction, stroke volume and cardiac output. Regional analysis of the left ventricle identified changes of wall properties in the scar area as the putative mechanism. Cell therapy reduced the thinning of the scar and significantly improved its radial contractility. Furthermore, the metabolic defect, assessed by [18F]FDG, was significantly reduced by the cell therapy. CONCLUSION Our data support the relevance of extending the assessment of global left ventricular parameters by a structured regional wall analysis for the evaluation of therapies targeting at modulation of healing myocardium. This approach will enable a deeper understanding of mechanisms underlying the effect of experimental regenerative therapies, thus paving the way for a successful translation into clinical application.
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Affiliation(s)
- Moritz Schweins
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, 18059, Rostock, Germany
| | - Ralf Gäbel
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, 18059, Rostock, Germany
| | - Matti Raitza
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, 18059, Rostock, Germany
| | - Praveen Vasudevan
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, 18059, Rostock, Germany
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Heiko Lemcke
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, 18059, Rostock, Germany
| | - Markus Joksch
- Department of Nuclear Medicine, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Anna Schildt
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Jens Kurth
- Department of Nuclear Medicine, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Felix G Meinel
- Institute of Diagnostic and Interventional Radiology, Rostock University Medical Center, Rostock, Germany
| | - Alper Öner
- Department of Cardiology, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Hüseyin Ince
- Department of Cardiology, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Bernd Joachim Krause
- Department of Nuclear Medicine, Rostock University Medical Centre, 18057, Rostock, Germany
| | - Robert David
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057, Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, 18059, Rostock, Germany
| | - Cajetan Immanuel Lang
- Department of Cardiology, Rostock University Medical Centre, 18057, Rostock, Germany.
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Polei S, Lindner T, Abshagen K, Liebig M, Krause BJ, Vollmar B, Weber MA. 7 Tesla MRI Liver Fat Quantification in Mice: Data Quality Assessment. Curr Med Imaging 2024; 20:1-10. [PMID: 38389373 DOI: 10.2174/0115734056263741231117112245] [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: 06/19/2023] [Revised: 10/06/2023] [Accepted: 10/16/2023] [Indexed: 02/24/2024]
Abstract
PURPOSE The objective of this study was to evaluate the robustness of proton density fat fraction (PDFF) data determined by magnetic resonance imaging (MRI) and spectroscopy (MRS) via spatially resolved error estimation. MATERIALS AND METHODS Using standard T2* relaxation time measurement protocols, in-vivo and ex-vivo MRI data with water and fat nominally in phase or out of phase relative to each other were acquired on a 7 T small animal scanner. Based on a total of 24 different echo times, PDFF maps were calculated in a magnitude-based approach. After identification of the decisive error-prone variables, pixel-wise error estimation was performed by simple propagation of uncertainty. The method was then used to evaluate PDFF data acquired for an explanted mouse liver and an in vivo mouse liver measurement. RESULTS The determined error maps helped excluding measurement errors as cause of unexpected local PDFF variations in the explanted liver. For in vivo measurements, severe error maps gave rise to doubts in the acquired PDFF maps and triggered an in-depth analysis of possible causes, yielding abdominal movement or bladder filling as in vivo occurring reasons for the increased errors. CONCLUSION The combination of pixel-wise acquisition of PDFF data and the corresponding error maps allows for a more specific, spatially resolved evaluation of the PDFF value reliability.
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Affiliation(s)
- Stefan Polei
- Institute of Diagnostic and Interventional Radiology, Pediatric Radiology and Neuroradiology, University Medical Center Rostock, Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - Kerstin Abshagen
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Marie Liebig
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Bernd J Krause
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Marc-André Weber
- Institute of Diagnostic and Interventional Radiology, Pediatric Radiology and Neuroradiology, University Medical Center Rostock, Rostock, Germany
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5
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Maletzki C, Freiin Grote V, Kalle F, Kleitke T, Zimpfer A, Becker AS, Bergmann-Ewert W, Jonitz-Heincke A, Bader R, Vollmar B, Hackenberg S, Scherzad A, Mlynski R, Strüder D. Establishing safe high hydrostatic pressure devitalization thresholds for autologous head and neck cancer vaccination and reconstruction. Cell Death Discov 2023; 9:390. [PMID: 37872173 PMCID: PMC10593744 DOI: 10.1038/s41420-023-01671-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 09/13/2023] [Accepted: 10/03/2023] [Indexed: 10/25/2023] Open
Abstract
High hydrostatic pressure specifically devitalizes cells and tissues without major changes in their molecular structure. Hence, high hydrostatic pressure may enhance the development of whole-cell anti-tumor vaccines, representing tumor heterogeneity and thus (neo-) antigen diversity. Moreover, safe devitalization of tumor-infiltrated supporting tissue may facilitate reimplantation for functional reconstruction. However, precise high hydrostatic pressure thresholds for safe cancer cell killing are unknown. Here, we show that high hydrostatic pressure of at least 450 MPa is necessary to safely devitalize head and neck squamous cell cancer. A pressure of 300 MPa, which has been used frequently in cancer vaccine preparation, resulted in partial devitalization with 27% live cells in flow cytometry and 4% remaining autofluorescence in cell culture after one week. The remaining cells could form vital tumors in the chorioallantoic membrane assay. In contrast, 450 MPa killed all cells in vitro and prevented tumor outgrowth in ovo. The effectiveness of 450 MPa was attributed to the induction of DNA double-strand breaks, independent of apoptosis, autophagy, or methuosis. Furthermore, 450 MPa continued to induce immunogenic cell death. Our results demonstrate that 450 MPa of high hydrostatic pressure induces safe and sustained devitalization of head and neck cancer cells and tissues. Because of the heterogeneity in pressure resistance, we propose our approach as a starting point for determining the precise thresholds for other cancer entities. Further studies on head and neck cancer should focus on immunological co-cultures, combinations of immune checkpoint inhibition, and accurate anatomical reconstruction with pressure-treated autografts.
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Affiliation(s)
- Claudia Maletzki
- Department of Internal Medicine, Medical Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Rostock, Germany
| | - Vivica Freiin Grote
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopedics, Rostock University Medical Centre, Rostock, Germany
| | - Friederike Kalle
- Department of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Rostock, Germany
| | - Thoralf Kleitke
- Department of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Rostock, Germany
| | - Annette Zimpfer
- Institute of Pathology, Rostock University Medical Center, Rostock, Germany
| | - Anne-Sophie Becker
- Institute of Pathology, Rostock University Medical Center, Rostock, Germany
| | - Wendy Bergmann-Ewert
- Core Facility for Cell Sorting and Cell Analysis, University Medical Center Rostock, Rostock, Germany
| | - Anika Jonitz-Heincke
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopedics, Rostock University Medical Centre, Rostock, Germany
| | - Rainer Bader
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopedics, Rostock University Medical Centre, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Stephan Hackenberg
- Department of Otorhinolaryngology-Head and Neck Surgery, RWTH Aachen University Hospital, Aachen, Germany
| | - Agmal Scherzad
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Wuerzburg, Germany
| | - Robert Mlynski
- Department of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Rostock, Germany
| | - Daniel Strüder
- Department of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Rostock, Germany.
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Zitzmann A, Bandorf T, Merz J, Müller-Graf F, Prütz M, Frenkel P, Reuter S, Vollmar B, Fuentes NA, Böhm SH, Reuter DA. Pressure- vs. volume-controlled ventilation and their respective impact on dynamic parameters of fluid responsiveness: a cross-over animal study. BMC Anesthesiol 2023; 23:320. [PMID: 37726649 PMCID: PMC10507836 DOI: 10.1186/s12871-023-02273-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 09/08/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND AND GOAL OF STUDY Pulse pressure variation (PPV) and stroke volume variation (SVV), which are based on the forces caused by controlled mechanical ventilation, are commonly used to predict fluid responsiveness. When PPV and SVV were introduced into clinical practice, volume-controlled ventilation (VCV) with tidal volumes (VT) ≥ 10 ml kg- 1 was most commonly used. Nowadays, lower VT and the use of pressure-controlled ventilation (PCV) has widely become the preferred type of ventilation. Due to their specific flow characteristics, VCV and PCV result in different airway pressures at comparable tidal volumes. We hypothesised that higher inspiratory pressures would result in higher PPVs and aimed to determine the impact of VCV and PCV on PPV and SVV. METHODS In this self-controlled animal study, sixteen anaesthetised, paralysed, and mechanically ventilated (goal: VT 8 ml kg- 1) pigs were instrumented with catheters for continuous arterial blood pressure measurement and transpulmonary thermodilution. At four different intravascular fluid states (IVFS; baseline, hypovolaemia, resuscitation I and II), ventilatory and hemodynamic data including PPV and SVV were assessed during VCV and PCV. Statistical analysis was performed using U-test and RM ANOVA on ranks as well as descriptive LDA and GEE analysis. RESULTS Complete data sets were available of eight pigs. VT and respiratory rates were similar in both forms. Heart rate, central venous, systolic, diastolic, and mean arterial pressures were not different between VCV and PCV at any IVFS. Peak inspiratory pressure was significantly higher in VCV, while plateau, airway and transpulmonary driving pressures were significantly higher in PCV. However, these higher pressures did not result in different PPVs nor SVVs at any IVFS. CONCLUSION VCV and PCV at similar tidal volumes and respiratory rates produced PPVs and SVVs without clinically meaningful differences in this experimental setting. Further research is needed to transfer these results to humans.
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Affiliation(s)
- Amelie Zitzmann
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany.
| | - Tim Bandorf
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Jonas Merz
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Fabian Müller-Graf
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Maria Prütz
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Paul Frenkel
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Susanne Reuter
- Rudolf-Zenker Institute for Experimental Surgery, University Medical Centre of Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker Institute for Experimental Surgery, University Medical Centre of Rostock, Rostock, Germany
| | - Nora A Fuentes
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
- Department of Research, Hospital Privado de Comunidad, Mar del Plata, Argentina
| | - Stephan H Böhm
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Daniel A Reuter
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Schillingallee 35, 18057, Rostock, Germany
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7
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Mösch L, Kunczik J, Breuer L, Merhof D, Gass P, Potschka H, Zechner D, Vollmar B, Tolba R, Häger C, Bleich A, Czaplik M, Pereira CB. Towards substitution of invasive telemetry: An integrated home cage concept for unobtrusive monitoring of objective physiological parameters in rodents. PLoS One 2023; 18:e0286230. [PMID: 37676867 PMCID: PMC10484458 DOI: 10.1371/journal.pone.0286230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/14/2023] [Indexed: 09/09/2023] Open
Abstract
This study presents a novel concept for a smart home cage design, tools, and software used to monitor the physiological parameters of mice and rats in animal-based experiments. The proposed system focuses on monitoring key clinical parameters, including heart rate, respiratory rate, and body temperature, and can also assess activity and circadian rhythm. As the basis of the smart home cage system, an in-depth analysis of the requirements was performed, including camera positioning, imaging system types, resolution, frame rates, external illumination, video acquisition, data storage, and synchronization. Two different camera perspectives were considered, and specific camera models, including two near-infrared and two thermal cameras, were selected to meet the requirements. The developed specifications, hardware models, and software are freely available via GitHub. During the first testing phase, the system demonstrated the potential of extracting vital parameters such as respiratory and heart rate. This technology has the potential to reduce the need for implantable sensors while providing reliable and accurate physiological data, leading to refinement and improvement in laboratory animal care.
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Affiliation(s)
- Lucas Mösch
- Department of Anaesthesiology, Faculty of Medicine, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany
| | - Janosch Kunczik
- Department of Anaesthesiology, Faculty of Medicine, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany
| | - Lukas Breuer
- Department of Anaesthesiology, Faculty of Medicine, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany
| | - Dorit Merhof
- Chair of Image Processing, Faculty of Computer and Data Science, Universität Regensburg, Regensburg, Bavaria, Germany
| | - Peter Gass
- Research Group Animal Models in Psychiatry, Department of Psychiatry and Psychotherapy, Central Institute of Mental Health Mannheim, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Baden Württemberg, Germany
| | - Heidrun Potschka
- Institute of Pharmacology, Toxicology, and Pharmacy, Ludwig-Maximilians-University, Munich, Bavaria, Germany
| | - Dietmar Zechner
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Centre Rostock, Rostock, Mecklenburg-Western Pomerania, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Centre Rostock, Rostock, Mecklenburg-Western Pomerania, Germany
| | - René Tolba
- Institute of Laboratory Animal Science, Faculty of Medicine, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany
| | - Christine Häger
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Lower Saxony, Germany
| | - André Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Lower Saxony, Germany
| | - Michael Czaplik
- Department of Anaesthesiology, Faculty of Medicine, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany
| | - Carina Barbosa Pereira
- Department of Anaesthesiology, Faculty of Medicine, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany
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8
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Stratos I, Schleese S, Rinas I, Vollmar B, Mittlmeier T. Effect of Calcitriol and Vitamin D Receptor Modulator 2 on Recovery of Injured Skeletal Muscle in Wistar Rats. Biomedicines 2023; 11:2477. [PMID: 37760917 PMCID: PMC10525631 DOI: 10.3390/biomedicines11092477] [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: 06/19/2023] [Revised: 08/15/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Muscle injuries often result in functional limitations due to insufficient healing. This study assessed the influence of calcitriol and vitamin D Receptor Modulator 2 (VDRM2) on muscle regeneration in male Wistar rats following open blunt muscle injury. The injured left soleus muscle of the rats was treated for the first four days after trauma with local injections of either calcitriol, VDRM2, or a 10% ethanol solution (control). Although muscle strength significantly decreased post-injury, all groups showed gradual improvement but did not achieve full recovery. By the 14th day, calcitriol-treated rats significantly outperformed the control group in the incomplete tetanic force, with VDRM2-treated rats showing muscle strength values that fell between the control and calcitriol groups. Similar trends were observed in complete tetanic contractions and were confirmed histologically via muscle cell width quantification. Additionally, histological analysis showed increased cellular turnover on the fourth postoperative day in the calcitriol group, as indicated by elevated cell proliferation rates and fewer apoptotic cells. VDRM2-treated animals showed only an increased proliferative activity on day 4 after injury. No noticeable differences between the groups for CAE-positive cells or visible muscle tissue area were found. In conclusion, predominantly calcitriol positively influenced post-trauma muscle recovery, where VDRM2 had substantially lower biological activity.
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Affiliation(s)
- Ioannis Stratos
- Department of Orthopaedic Surgery, University of Wuerzburg, 97074 Wuerzburg, Germany
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Svenja Schleese
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Ingmar Rinas
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany;
| | - Thomas Mittlmeier
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
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9
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Berner J, Miebach L, Kordt M, Seebauer C, Schmidt A, Lalk M, Vollmar B, Metelmann HR, Bekeschus S. Chronic oxidative stress adaptation in head and neck cancer cells generates slow-cyclers with decreased tumour growth in vivo. Br J Cancer 2023; 129:869-883. [PMID: 37460712 PMCID: PMC10449771 DOI: 10.1038/s41416-023-02343-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 06/15/2023] [Accepted: 06/21/2023] [Indexed: 08/26/2023] Open
Abstract
BACKGROUND Reactive oxygen species (ROS) are implicated in cancer therapy and as drivers of microenvironmental tumour cell adaptations. Medical gas plasma is a multi-ROS generating technology that has been shown effective for palliative tumour control in head and neck cancer (HNC) patients before tumour cells adapted to the oxidative stress and growth regressed fatally. METHODS In a bedside-to-bench approach, we sought to explore the oxidative stress adaptation in two human squamous cell carcinoma cell lines. Gas plasma was utilised as a putative therapeutic agent and chronic oxidative stress inducer. RESULTS Cellular responses of single and multiple treated cells were compared regarding sensitivity, cellular senescence, redox state and cytokine release. Whole transcriptome analysis revealed a strong correlation of cancer cell adaption with increased interleukin 1 receptor type 2 (IL1R2) expression. Using magnetic resonance imaging, tumour growth and gas plasma treatment responses of wild-type (WT) and repeatedly exposed (RE) A431 cells were further investigated in a xenograft model in vivo. RE cells generated significantly smaller tumours with suppressed inflammatory secretion profiles and increased epidermal growth factor receptor (EGFR) activity showing significantly lower gas plasma sensitivity until day 8. CONCLUSIONS Clinically, combination treatments together with cetuximab, an EGFR inhibitor, may overcome acquired oxidative stress resistance in HNC.
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Grants
- This study was funded by the joint research project ONKOTHER-H is supported by the European Social Fund (ESF, grant numbers ESF/14-BM-A55-0003/18, ESF/14-BM-A55-0005/18, and ESF/14-BM-A55-0006/18) and the Ministry of Education, Science, and Culture of Mecklenburg-Vorpommern, Germany, as well as the German Federal Ministry of Education and Research (BMBF, grant numbers 03Z22DN11 and 03Z22Di1).
- This study was funded by the joint research project ONKOTHER-H is supported by the European Social Fund (ESF, grant numbers ESF/14-BM-A55-0005/18).
- Gerhard-Domagk-Foundation Greifswald (Germany).
- This study was funded by the joint research project ONKOTHER-H is supported by the European Social Fund (ESF, grant numbers ESF/14-BM-A55-0003/18).
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Affiliation(s)
- Julia Berner
- Department of Oral, Maxillofacial, and Plastic Surgery, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str, 17475, Greifswald, Germany
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Lea Miebach
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
- Department of General, Visceral, Thoracic, and Vascular Surgery, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str, 17475, Greifswald, Germany
| | - Marcel Kordt
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany
| | - Christian Seebauer
- Department of Oral, Maxillofacial, and Plastic Surgery, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str, 17475, Greifswald, Germany
| | - Anke Schmidt
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Michael Lalk
- Institute for Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, 17489, Greifswald, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany
| | - Hans-Robert Metelmann
- Department of Oral, Maxillofacial, and Plastic Surgery, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str, 17475, Greifswald, Germany
| | - Sander Bekeschus
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany.
- Clinic and Policlinic for Dermatology and Venerology, Rostock University Medical Center, Strempelstr. 13, 18057, Rostock, Germany.
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10
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Vasudevan P, Wolfien M, Lemcke H, Lang CI, Skorska A, Gaebel R, Galow AM, Koczan D, Lindner T, Bergmann W, Mueller-Hilke B, Vollmar B, Krause BJ, Wolkenhauer O, Steinhoff G, David R. CCR2 macrophage response determines the functional outcome following cardiomyocyte transplantation. Genome Med 2023; 15:61. [PMID: 37563727 PMCID: PMC10416392 DOI: 10.1186/s13073-023-01213-3] [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: 03/14/2023] [Accepted: 07/17/2023] [Indexed: 08/12/2023] Open
Abstract
BACKGROUND The immune response is a crucial factor for mediating the benefit of cardiac cell therapies. Our previous research showed that cardiomyocyte transplantation alters the cardiac immune response and, when combined with short-term pharmacological CCR2 inhibition, resulted in diminished functional benefit. However, the specific role of innate immune cells, especially CCR2 macrophages on the outcome of cardiomyocyte transplantation, is unclear. METHODS We compared the cellular, molecular, and functional outcome following cardiomyocyte transplantation in wildtype and T cell- and B cell-deficient Rag2del mice. The cardiac inflammatory response was assessed using flow cytometry. Gene expression profile was assessed using single-cell and bulk RNA sequencing. Cardiac function and morphology were determined using magnetic resonance tomography and immunohistochemistry respectively. RESULTS Compared to wildtype mice, Rag2del mice show an increased innate immune response at steady state and disparate macrophage response after MI. Subsequent single-cell analyses after MI showed differences in macrophage development and a lower prevalence of CCR2 expressing macrophages. Cardiomyocyte transplantation increased NK cells and monocytes, while reducing CCR2-MHC-IIlo macrophages. Consequently, it led to increased mRNA levels of genes involved in extracellular remodelling, poor graft survival, and no functional improvement. Using machine learning-based feature selection, Mfge8 and Ccl7 were identified as the primary targets underlying these effects in the heart. CONCLUSIONS Our results demonstrate that the improved functional outcome following cardiomyocyte transplantation is dependent on a specific CCR2 macrophage response. This work highlights the need to study the role of the immune response for cardiomyocyte cell therapy for successful clinical translation.
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Affiliation(s)
- Praveen Vasudevan
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Markus Wolfien
- Department of Systems Biology and Bioinformatics, Institute of Computer Science, University of Rostock, 18057 Rostock, Germany
- Institute for Medical Informatics and Biometry, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
- Center for Scalable Data Analytics and Artificial Intelligence (ScaDS.AI), Dresden/Leipzig, Germany
| | - Heiko Lemcke
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
| | | | - Anna Skorska
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
| | - Ralf Gaebel
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
| | - Anne-Marie Galow
- Institute of Genome Biology, Research Institute for Farm Animal Biology (FBN), 18196 Dummerstorf, Germany
| | - Dirk Koczan
- Core Facility for Microarray Analysis, Institute for Immunology, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Wendy Bergmann
- Core Facility for Cell Sorting & Cell Analysis, Laboratory for Clinical Immunology, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Brigitte Mueller-Hilke
- Core Facility for Cell Sorting & Cell Analysis, Laboratory for Clinical Immunology, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Bernd Joachim Krause
- Department of Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Olaf Wolkenhauer
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Stellenbosch Institute of Advanced Study (STIAS), Wallenberg Research Centre at Stellenbosch University, Stellenbosch, 7602 South Africa
| | - Gustav Steinhoff
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
| | - Robert David
- Department of Cardiac Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
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11
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Chabanovska O, Lemcke H, Lang H, Vollmar B, Dohmen PM, David R, Etz C, Neßelmann C. Sarcomeric network analysis of ex vivo cultivated human atrial appendage tissue using super-resolution microscopy. Sci Rep 2023; 13:13041. [PMID: 37563225 PMCID: PMC10415305 DOI: 10.1038/s41598-023-39962-1] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/02/2023] [Indexed: 08/12/2023] Open
Abstract
Investigating native human cardiac tissue with preserved 3D macro- and microarchitecture is fundamental for clinical and basic research. Unfortunately, the low accessibility of the human myocardium continues to limit scientific progress. To overcome this issue, utilizing atrial appendages of the human heart may become highly beneficial. Atrial appendages are often removed during open-heart surgery and can be preserved ex vivo as living tissue with varying durability depending on the culture method. In this study, we prepared living thin myocardial slices from left atrial appendages that were cultured using an air-liquid interface system for overall 10 days. Metabolic activity of the cultured slices was assessed using a conventional methyl thiazolyl tetrazolium (MTT) assay. To monitor the structural integrity of cardiomyocytes within the tissue, we implemented our recently described super-resolution microscopy approach that allows both qualitative and quantitative in-depth evaluation of sarcomere network based on parameters such as overall sarcomere content, filament size and orientation. Additionally, expression of mRNAs coding for key structural and functional proteins was analyzed by real-time reverse transcription polymerase chain reaction (qRT-PCR). Our findings demonstrate highly significant disassembly of contractile apparatus represented by degradation of [Formula: see text]-actinin filaments detected after three days in culture, while metabolic activity was constantly rising and remained high for up to seven days. However, gene expression of crucial cardiac markers strongly decreased after the first day in culture indicating an early destructive response to ex vivo conditions. Therefore, we suggest static cultivation of living myocardial slices derived from left atrial appendage and prepared according to our protocol only for short-termed experiments (e.g. medicinal drug testing), while introduction of electro-mechanical stimulation protocols may offer the possibility for long-term integrity of such constructs.
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Affiliation(s)
- Oleksandra Chabanovska
- Reference and Translation Center for Cardiac Stem Cell therapy (RTC), Department of Cardiac Surgery, Rostock University Medical Center, 18057, Rostock, Germany
- Department of Life, Light, and Matter of the Interdisciplinary Faculty, Rostock University, 18059, Rostock, Germany
- Department of Operative Dentistry and Periodontology, Rostock University Medical Center, 18059, Rostock, Germany
| | - Heiko Lemcke
- Reference and Translation Center for Cardiac Stem Cell therapy (RTC), Department of Cardiac Surgery, Rostock University Medical Center, 18057, Rostock, Germany
- Department of Life, Light, and Matter of the Interdisciplinary Faculty, Rostock University, 18059, Rostock, Germany
| | - Hermann Lang
- Department of Operative Dentistry and Periodontology, Rostock University Medical Center, 18059, Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18059, Rostock, Germany
| | - Pascal M Dohmen
- Department of Cardiac Surgery, Rostock University Medical Center, 18059, Rostock, Germany
- Department of Cardiothoracic Surgery, Faculty of Health Science, University of the Free State, Bloemfontein, 9301, South Africa
| | - Robert David
- Reference and Translation Center for Cardiac Stem Cell therapy (RTC), Department of Cardiac Surgery, Rostock University Medical Center, 18057, Rostock, Germany.
- Department of Life, Light, and Matter of the Interdisciplinary Faculty, Rostock University, 18059, Rostock, Germany.
| | - Christian Etz
- Department of Cardiac Surgery, Rostock University Medical Center, 18059, Rostock, Germany
| | - Catharina Neßelmann
- Department of Cardiac Surgery, Rostock University Medical Center, 18059, Rostock, Germany
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12
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Hoeger NS, Mittlmeier T, Vollmar B, Stratos I, Dobson GP, Rotter R. ALM Therapy Promotes Functional and Histologic Regeneration of Traumatized Peripheral Skeletal Muscle. Biology (Basel) 2023; 12:870. [PMID: 37372154 DOI: 10.3390/biology12060870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/07/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
Skeletal muscle trauma is a common injury with a range of severity. Adenosine, lidocaine and Mg2+ (ALM) is a protective solution and improves tissue perfusion and coagulopathy. Male Wistar rats were anesthetized and subjected to standardized skeletal muscle trauma of the left soleus muscle with the protection of the neurovascular structures. Seventy animals were randomly assigned to saline control or ALM. Immediately after trauma, a bolus of ALM solution was applied intravenously, followed by a one-hour infusion. After 1, 4, 7, 14 and 42 days, the biomechanical regenerative capacity was examined using incomplete tetanic force and tetany, and immunohistochemistry was used to examine for proliferation and apoptosis characteristics. Biomechanical force development showed a significant increase following ALM therapy for incomplete tetanic force and tetany on days 4 and 7. In addition, the histological evaluation showed a significant increase in proliferative BrdU-positive cells with ALM therapy on days 1 and 14. Ki67 histology also detected significantly more proliferative cells on days 1, 4, 7, 14 and 42 in ALM-treated animals. Furthermore, a simultaneous decrease in the number of apoptotic cells was observed using the TUNEL method. ALM solution showed significant superiority in biomechanical force development and also a significant positive effect on cell proliferation in traumatized skeletal muscle tissue and reduced apoptosis.
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Affiliation(s)
- Nina Sarah Hoeger
- Department of Trauma and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Thomas Mittlmeier
- Department of Trauma and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany
| | - Ioannis Stratos
- Department of Orthopaedic Surgery, University of Wuerzburg, 97074 Wuerzburg, Germany
| | - Geoffrey P Dobson
- Heart and Trauma Research Laboratory, College of Medicine and Dentistry, James Cook University, Townsville, QLD 4811, Australia
| | - Robert Rotter
- Department of Trauma and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
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13
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Stratos I, Rinas I, Schröpfer K, Hink K, Herlyn P, Bäumler M, Histing T, Bruhn S, Müller-Hilke B, Menger MD, Vollmar B, Mittlmeier T. Effects on Bone and Muscle upon Treadmill Interval Training in Hypogonadal Male Rats. Biomedicines 2023; 11:biomedicines11051370. [PMID: 37239040 DOI: 10.3390/biomedicines11051370] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/14/2023] [Revised: 05/01/2023] [Accepted: 05/03/2023] [Indexed: 05/28/2023] Open
Abstract
Testosterone deficiency in males is linked to various pathological conditions, including muscle and bone loss. This study evaluated the potential of different training modalities to counteract these losses in hypogonadal male rats. A total of 54 male Wistar rats underwent either castration (ORX, n = 18) or sham castration (n = 18), with 18 castrated rats engaging in uphill, level, or downhill interval treadmill training. Analyses were conducted at 4, 8, and 12 weeks postsurgery. Muscle force of the soleus muscle, muscle tissue samples, and bone characteristics were analyzed. No significant differences were observed in cortical bone characteristics. Castrated rats experienced decreased trabecular bone mineral density compared to sham-operated rats. However, 12 weeks of training increased trabecular bone mineral density, with no significant differences among groups. Muscle force measurements revealed decreased tetanic force in castrated rats at week 12, while uphill and downhill interval training restored force to sham group levels and led to muscle hypertrophy compared to ORX animals. Linear regression analyses showed a positive correlation between bone biomechanical characteristics and muscle force. The findings suggest that running exercise can prevent bone loss in osteoporosis, with similar bone restoration effects observed across different training modalities.
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Affiliation(s)
- Ioannis Stratos
- Department of Orthopaedic Surgery, University of Würzburg, 97074 Wuerzburg, Germany
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Ingmar Rinas
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Konrad Schröpfer
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany
| | - Katharina Hink
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany
| | - Philipp Herlyn
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
| | - Mario Bäumler
- Olympic Training Center Mecklenburg-Vorpommern, 18057 Rostock, Germany
| | - Tina Histing
- Department of Trauma and Reconstructive Surgery, Eberhard-Karls-University Tuebingen, BG Unfallklinik, 72076 Tuebingen, Germany
| | - Sven Bruhn
- Institute of Sport Science, University of Rostock, 18057 Rostock, Germany
| | | | - Michael D Menger
- Institute for Clinical and Experimental Surgery, University of Saarland, 66123 Homburg, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany
| | - Thomas Mittlmeier
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany
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14
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Müller L, Power Guerra N, Schildt A, Lindner T, Stenzel J, Behrangi N, Bergner C, Alberts T, Bühler D, Kurth J, Krause BJ, Janowitz D, Teipel S, Vollmar B, Kuhla A. [ 18F]GE-180-PET and Post Mortem Marker Characteristics of Long-Term High-Fat-Diet-Induced Chronic Neuroinflammation in Mice. Biomolecules 2023; 13:biom13050769. [PMID: 37238638 DOI: 10.3390/biom13050769] [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: 03/15/2023] [Revised: 04/14/2023] [Accepted: 04/26/2023] [Indexed: 05/28/2023] Open
Abstract
Obesity is characterized by immoderate fat accumulation leading to an elevated risk of neurodegenerative disorders, along with a host of metabolic disturbances. Chronic neuroinflammation is a main factor linking obesity and the propensity for neurodegenerative disorders. To determine the cerebrometabolic effects of diet-induced obesity (DIO) in female mice fed a long-term (24 weeks) high-fat diet (HFD, 60% fat) compared to a group on a control diet (CD, 20% fat), we used in vivo PET imaging with the radiotracer [18F]FDG as a marker for brain glucose metabolism. In addition, we determined the effects of DIO on cerebral neuroinflammation using translocator protein 18 kDa (TSPO)-sensitive PET imaging with [18F]GE-180. Finally, we performed complementary post mortem histological and biochemical analyses of TSPO and further microglial (Iba1, TMEM119) and astroglial (GFAP) markers as well as cerebral expression analyses of cytokines (e.g., Interleukin (IL)-1β). We showed the development of a peripheral DIO phenotype, characterized by increased body weight, visceral fat, free triglycerides and leptin in plasma, as well as increased fasted blood glucose levels. Furthermore, we found obesity-associated hypermetabolic changes in brain glucose metabolism in the HFD group. Our main findings with respect to neuroinflammation were that neither [18F]GE-180 PET nor histological analyses of brain samples seem fit to detect the predicted cerebral inflammation response, despite clear evidence of perturbed brain metabolism along with elevated IL-1β expression. These results could be interpreted as a metabolically activated state in brain-resident immune cells due to a long-term HFD.
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Affiliation(s)
- Luisa Müller
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Psychosomatic Medicine and Psychotherapy, Rostock University Medical Centre, 18147 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
| | - Nicole Power Guerra
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Institute of Anatomy, Rostock University Medical Centre, 18057 Rostock, Germany
- Smell & Taste Clinic, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01034 Dresden, Germany
| | - Anna Schildt
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Newshan Behrangi
- Institute of Anatomy and Cell Biology, Medical University of Bonn, 53115 Bonn, Germany
| | - Carina Bergner
- Department of Clinic and Polyclinic for Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Teresa Alberts
- Institute of Anatomy and Cell Biology, Medical University of Bonn, 53115 Bonn, Germany
| | - Daniel Bühler
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Jens Kurth
- Department of Clinic and Polyclinic for Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Bernd Joachim Krause
- Department of Clinic and Polyclinic for Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Deborah Janowitz
- Department of Psychiatry, University of Greifswald, 17475 Greifswald, Germany
| | - Stefan Teipel
- Department of Psychosomatic Medicine and Psychotherapy, Rostock University Medical Centre, 18147 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE) Rostock/Greifswald, 18147 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
| | - Angela Kuhla
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
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15
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Bajorat R, Danckert L, Ebert F, Bancken T, Bergt S, Klawitter F, Vollmar B, Reuter DA, Schürholz T, Ehler J. The Effect of Early Application of Synthetic Peptides 19-2.5 and 19-4LF to Improve Survival and Neurological Outcome in a Mouse Model of Cardiac Arrest and Resuscitation. Biomedicines 2023; 11:biomedicines11030855. [PMID: 36979834 PMCID: PMC10045145 DOI: 10.3390/biomedicines11030855] [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] [Received: 02/07/2023] [Revised: 03/02/2023] [Accepted: 03/06/2023] [Indexed: 03/16/2023] Open
Abstract
The synthetic antimicrobial peptides (sAMPs) Pep19-2.5 and Pep19-4LF have been shown in vitro and in vivo to reduce the release of pro-inflammatory cytokines, leading to the suppression of inflammation and immunomodulation. We hypothesized that intervention with Pep19-2.5 and Pep19-4LF immediately after cardiac arrest and resuscitation (CA-CPR) might attenuate immediate systemic inflammation, survival, and long-term outcomes in a standardized mouse model of CA-CPR. Long-term outcomes up to 28 days were assessed between a control group (saline) and two peptide intervention groups. Primarily, survival as well as neurological and cognitive parameters were assessed. In addition, systemic inflammatory molecules and specific biomarkers were analyzed in plasma as well as in brain tissue. Treatment with sAMPs did not provide any short- or long-term benefits for either survival or neurological outcomes, and no significant benefit on inflammation in the CA-CPR animal model. While no difference was found in the plasma analysis of early cytokines between the intervention groups four hours after resuscitation, a significant increase in UCH-L1, a biomarker of neuronal damage and blood–brain barrier rupture, was measured in the Pep19-4LF-treated group. The theoretical benefit of both sAMPs tested here for the treatment of post-cardiac arrest syndrome could not be proven.
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Affiliation(s)
- Rika Bajorat
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
- Correspondence:
| | - Lena Danckert
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
| | - Florian Ebert
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
| | - Theresa Bancken
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
| | - Stefan Bergt
- Department of Anesthesiology and Intensive Care Medicine, MEDICLIN Müritz-Klinikum, 17192 Waren, Germany
| | - Felix Klawitter
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany
| | - Daniel A. Reuter
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
| | - Tobias Schürholz
- Department of Intensive and Intermediate Care, University Hospital RWTH Aachen, 52074 Aachen, Germany
| | - Johannes Ehler
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Rostock University Medical Center, 18057 Rostock, Germany
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Talbot SR, Kumstel S, Schulz B, Tang G, Abdelrahman A, Seume N, Wendt EHU, Eichberg J, Häger C, Bleich A, Vollmar B, Zechner D. Robustness of a multivariate composite score when evaluating distress of animal models for gastrointestinal diseases. Sci Rep 2023; 13:2605. [PMID: 36788346 PMCID: PMC9929045 DOI: 10.1038/s41598-023-29623-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/07/2023] [Indexed: 02/16/2023] Open
Abstract
The fundament of an evidence-based severity assessment in laboratory animal science is reliable distress parameters. Many readouts are used to evaluate and determine animal distress and the severity of experimental procedures. Therefore, we analyzed four distinct parameters like the body weight, burrowing behavior, nesting, and distress score in the four gastrointestinal animal models (pancreatic ductal adenocarcinoma (PDA), pancreatitis, CCl4 intoxication, and bile duct ligation (BDL)). Further, we determined the parameters' robustness in various experimental subgroups due to slight variations like drug treatment or telemeter implantations. We used non-parametric bootstrapping to get robust estimates and 95% confidence intervals for the experimental groups. It was found that the performance of the readout parameters is model-dependent and that the distress score is prone to experimental variation. On the other hand, we also found that burrowing and nesting can be more robust than, e.g., the body weight when evaluating PDA. However, the body weight still was highly robust in BDL, pancreatitis, and CCl4 intoxication. To address the complex nature of the multi-dimensional severity space, we used the Relative Severity Assessment (RELSA) procedure to combine multiple distress parameters into a score and mapped the subgroups and models against a defined reference set obtained by telemeter implantation. This approach allowed us to compare the severity of individual animals in the experimental subgroups using the maximum achieved severity (RELSAmax). With this, the following order of severity was found for the animal models: CCl4 < PDA ≈ Pancreatitis < BDL. Furthermore, the robustness of the RELSA procedure and outcome was externally validated with a reference set from another laboratory also obtained from telemeter implantation. Since the RELSA procedure reflects the multi-dimensional severity information and is highly robust in estimating the quantitative severity within and between models, it can be deemed a valuable tool for laboratory animal severity assessment.
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Affiliation(s)
- Steven R Talbot
- Hannover Medical School, Institute for Laboratory Animal Science, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.
| | - Simone Kumstel
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Benjamin Schulz
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Guanglin Tang
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Ahmed Abdelrahman
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Nico Seume
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Edgar H U Wendt
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Johanna Eichberg
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Christine Häger
- Hannover Medical School, Institute for Laboratory Animal Science, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - André Bleich
- Hannover Medical School, Institute for Laboratory Animal Science, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Brigitte Vollmar
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
| | - Dietmar Zechner
- Rostock University Medical Center, Rudolf-Zenker-Institute for Experimental Surgery, Schillingallee 69a, 18057, Rostock, Germany
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17
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Mueller-Graf F, Frenkel P, Albus CF, Henkel M, Reuter S, Vollmar B, Tusman G, Adler A, Pulletz S, Böhm SH, Zitzmann A, Reuter DA. Ventilation Induces Changes in Pulse Wave Transit Time in the Pulmonary Artery. Biomedicines 2023; 11:biomedicines11010182. [PMID: 36672690 PMCID: PMC9855784 DOI: 10.3390/biomedicines11010182] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/06/2023] [Accepted: 01/08/2023] [Indexed: 01/13/2023] Open
Abstract
Pulse wave transit time (PWTT) shortens as pulmonary artery pressure (PAP) increases and was therefore suggested as a surrogate parameter for PAP. The aim of this analysis was to reveal patterns and potential mechanisms of ventilation-induced periodic changes in PWTT under resting conditions. To measure both PWTT and PAP in five healthy pigs, two pulmonary artery Mikro-Tip™ catheters were inserted into the pulmonary vasculature: one with the tip placed in the pulmonary artery trunk, and a second one placed in a distal segment of the pulmonary artery. Animals received pressure-controlled mechanical ventilation. Ventilation-dependent changes were seen in both variables, PWTT and mean PAP; however, changes in PWTT were not synchronous with changes in PAP. Thus, plotting the value of PWTT for each heartbeat over the respective PAP revealed a characteristic hysteresis. At the beginning of inspiration, PAP rose while PWTT remained constant. During further inspiration, PWTT started to decrease rapidly as mPAP was about to reach its plateau. The same time course was observed during expiration: while mPAP approached its minimum, PWTT increased rapidly. During apnea this hysteresis disappeared. Thus, non-synchronous ventilation-induced changes in PWTT and PAP were found with inspiration causing a significant shortening of PWTT. Therefore, it is suggested that the respiratory cycle should be considered when using PWTT as a surrogate for PAP.
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Affiliation(s)
- Fabian Mueller-Graf
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, 18057 Rostock, Germany
- Correspondence: ; Tel.: +49-381-494-146232
| | - Paul Frenkel
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Chiara Felicitas Albus
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Maike Henkel
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Susanne Reuter
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, 18057 Rostock, Germany
| | - Gerardo Tusman
- Department of Anesthesiology, Hospital Privado de Comunidad, Mar de Plata 7600, Argentina
| | - Andy Adler
- Systems and Computer Engineering, Carleton University, Ottawa, ON K1S5B6, Canada
| | - Sven Pulletz
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Stephan H. Böhm
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Amelie Zitzmann
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Daniel A. Reuter
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Center Rostock, Schillingallee 35, 18057 Rostock, Germany
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Berlin P, Barrantes I, Reiner J, Schröder E, Vollmar B, Bull J, Kreikemeyer B, Lamprecht G, Witte M. Dysbiosis and reduced small intestinal function are required to induce intestinal insufficiency in mice. Am J Physiol Gastrointest Liver Physiol 2023; 324:G10-G23. [PMID: 36346150 PMCID: PMC9799149 DOI: 10.1152/ajpgi.00201.2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Extensive bowel resection can lead to short bowel syndrome and intestinal failure. Resection-induced dysbiosis may be related to the specific anatomic site of resection and influences the disease progression. Although patients with end-jejunostomy are at high risk for intestinal failure, preservation of the ileocecal valve and colon counteracts this risk. The present study investigated the role of the cecum in maintaining microbial homeostasis after different types of small bowel resection. Male C57BL6/J mice were anesthetized by intraperitoneal injection of ketamine-xylazine and received extended ileocecal resection (extended ICR), limited ileocecal resection (limited ICR), or mid-small bowel resection (SBR). Stool samples were collected before surgery and between postoperative days 2-7, for 16S rRNA gene sequencing. Only extended ICR, but neither limited ICR nor SBR, induced intestinal insufficiency. α-Diversity was reduced in both ICR variants but not after SBR. All resections resulted in an increase in Proteobacteria. Pathobionts, such as Clostridia, Shigella, and Enterococcus, increased after SBR while Muribaculaceae, Lactobacillus, and Lachnospiraceae decreased. Limited ICR resulted in an increase of members of the Clostridium sensu stricto group, Terrisporobacter and Enterococcus and a decrease of Muribaculaceae. The increase of Enterococcus was even more pronounced after extended ICR while Muribaculaceae and Akkermansia were dramatically reduced. Both ICR variants caused a decrease in steroid biosynthesis and glycosaminoglycan degradation-associated pathways, suggesting altered bile acid transformation and mucus utilization.NEW & NOTEWORTHY Resection-induced dysbiosis affects disease progression in patients with short bowel syndrome. Severe dysbiosis occurs after removal of the ileocecal valve, even in the absence of short bowel conditions, and is associated with the loss of Muribaculaceae and Akkermansia and an increase of Clostridium and Enterococcus. The preservation of the cecum should be considered in surgical therapy, and dysbiosis should be targeted based on its specific anatomical signature to improve postoperative bacterial colonization.
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Affiliation(s)
- Peggy Berlin
- 1Division of Gastroenterology, Department of Medicine II, Rostock University Medical Center, Rostock, Germany
| | - Israel Barrantes
- 2Institute for Biostatistics and Informatics in Medicine and Ageing Research, Rostock University Medical Center, Rostock, Germany
| | - Johannes Reiner
- 1Division of Gastroenterology, Department of Medicine II, Rostock University Medical Center, Rostock, Germany
| | - Emma Schröder
- 1Division of Gastroenterology, Department of Medicine II, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- 3Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Jana Bull
- 4Institute for Microbiology, Virology and Hygiene, University Medicine Rostock, Rostock, Germany
| | - Bernd Kreikemeyer
- 4Institute for Microbiology, Virology and Hygiene, University Medicine Rostock, Rostock, Germany
| | - Georg Lamprecht
- 1Division of Gastroenterology, Department of Medicine II, Rostock University Medical Center, Rostock, Germany
| | - Maria Witte
- 5Department of General, Visceral, Thoracic, Vascular and Transplant Surgery, Rostock University Medical Center, Rostock, Germany
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19
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Bleich A, Vollmar B, Tolba RH. Animal Welfare: Severity Assessment in Experimental Research. Eur Surg Res 2023; 64:5-6. [PMID: 36754043 DOI: 10.1159/000529604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 01/30/2023] [Indexed: 02/10/2023]
Affiliation(s)
- Andre Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany
| | - Rene H Tolba
- Institute for Laboratory Animal Science and Experimental Surgery, University of Aachen Medical Center, Faculty of Medicine, RWTH-Aachen University, Aachen, Germany
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20
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Bühler D, Power Guerra N, Müller L, Wolkenhauer O, Düffer M, Vollmar B, Kuhla A, Wolfien M. Leptin deficiency-caused behavioral change - A comparative analysis using EthoVision and DeepLabCut. Front Neurosci 2023; 17:1052079. [PMID: 37034162 PMCID: PMC10079875 DOI: 10.3389/fnins.2023.1052079] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 03/02/2023] [Indexed: 04/11/2023] Open
Abstract
Introduction Obese rodents e.g., the leptin-deficient (ob/ob) mouse exhibit remarkable behavioral changes and are therefore ideal models for evaluating mental disorders resulting from obesity. In doing so, female as well as male ob/ob mice at 8, 24, and 40 weeks of age underwent two common behavioral tests, namely the Open Field test and Elevated Plus Maze, to investigate behavioral alteration in a sex- and age dependent manner. The accuracy of these tests is often dependent on the observer that can subjectively influence the data. Methods To avoid this bias, mice were tracked with a video system. Video files were further analyzed by the compared use of two software, namely EthoVision (EV) and DeepLabCut (DLC). In DLC a Deep Learning application forms the basis for using artificial intelligence in behavioral research in the future, also with regard to the reduction of animal numbers. Results After no sex and partly also no age-related differences were found, comparison revealed that both software lead to almost identical results and are therefore similar in their basic outcomes, especially in the determination of velocity and total distance movement. Moreover, we observed additional benefits of DLC compared to EV as it enabled the interpretation of more complex behavior, such as rearing and leaning, in an automated manner. Discussion Based on the comparable results from both software, our study can serve as a starting point for investigating behavioral alterations in preclinical studies of obesity by using DLC to optimize and probably to predict behavioral observations in the future.
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Affiliation(s)
- Daniel Bühler
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
- Institute of Experimental Epileptology and Cognition Research, University Medical Center Bonn, Bonn, Germany
- Department of Systems Biology and Bioinformatics, University of Rostock, Rostock, Germany
| | - Nicole Power Guerra
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
- Clinic and Polyclinic for Otorhinolaryngology and Otolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Luisa Müller
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Center, Rostock, Germany
- Department of Psychosomatic Medicine and Psychotherapy, Rostock University Medical Center, Rostock, Germany
| | - Olaf Wolkenhauer
- Department of Systems Biology and Bioinformatics, University of Rostock, Rostock, Germany
- Leibniz-Institute for Food Systems Biology, Technical University of Munich, Freising, Germany
| | - Martin Düffer
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Center, Rostock, Germany
| | - Angela Kuhla
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Center, Rostock, Germany
- *Correspondence: Angela Kuhla,
| | - Markus Wolfien
- Department of Systems Biology and Bioinformatics, University of Rostock, Rostock, Germany
- Institute for Medical Informatics and Biometry, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Center for Scalable Data Analytics and Artificial Intelligence (ScaDS.AI), Dresden, Germany
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21
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Power Guerra N, Leyens K, Müller L, Brauer D, Janowitz D, Schlick S, Pilz K, Grabe HJ, Vollmar B, Kuhla A. The effect of different weight loss strategies to treat non-alcoholic fatty liver disease focusing on fibroblast growth factor 21. Front Nutr 2022; 9:935805. [PMID: 36034917 PMCID: PMC9399780 DOI: 10.3389/fnut.2022.935805] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Objective Obesity, often associated with non-alcoholic fatty liver disease (NAFLD), is characterized by an imbalance between energy expenditure and food intake, which is also reflected by desensitization of fibroblast growth factor 21 (FGF21). FGF21 is strongly influenced, among others, by TNFα, which is known to be upregulated in obesity-induced inflammation. Successful long-term treatments of NAFLD might be dietary modification, exercise, or fasting. Materials and methods Whether succeeded NAFLD recovery is linked with improved FGF21 sensitivity and finally reverted FGF21 resistance was the focus of the present study. For this purpose, mice received a high-fat diet (HFD) for 6 months to establish obesity. Afterward, the mice were subjected to three different weight loss interventions, namely, dietary change to low-fat diet (LFD), treadmill training, and/or time-restricted feeding for additional 6 months, whereas one group remained on HFD. Results In addition to the expected decrease in NAFLD activity with dietary change, this was also observed in the HFD group with additional time-restricted feeding. There was also an associated decrease in hepatic TNFα and FGF21 expression and an increase in ß-klotho expression, demonstrated mainly by using principal component analysis. Pearson correlation analysis shows that independent of any intervention, TNFα expression decreased with improved NAFLD recovery. This was accompanied with higher FGF21 sensitivity, as expressed by an increase in β-klotho and FGFR1c expression and concomitantly decreased FGF21 levels. Conclusion In summary, we conclude that successful NAFLD therapy is associated with a reversion of the TNFα-triggered FGF21-resistant state or desensitization.
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Affiliation(s)
- Nicole Power Guerra
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Institute of Anatomy, Rostock University Medical Center, Rostock, Germany
| | - Katharina Leyens
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Luisa Müller
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Department of Psychosomatic Medicine, Rostock University Medical Center, Rostock, Germany
| | - David Brauer
- Department of Systems Biology and Bioinformatics, University of Rostock, Rostock, Germany
| | - Deborah Janowitz
- Department of Psychiatry, University Medicine Greifswald, Greifswald, Germany.,Clinic for Psychiatry and Psychotherapy, HELIOS Hanseklinikum Stralsund, Stralsund, Germany
| | - Samin Schlick
- Department of Psychiatry, University Medicine Greifswald, Greifswald, Germany.,Clinic for Psychiatry and Psychotherapy, HELIOS Hanseklinikum Stralsund, Stralsund, Germany
| | - Kristin Pilz
- Department of Psychiatry, University Medicine Greifswald, Greifswald, Germany
| | - Hans J Grabe
- Department of Psychiatry, University Medicine Greifswald, Greifswald, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Angela Kuhla
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Stratos I, Behrendt AK, Anselm C, Gonzalez A, Mittlmeier T, Vollmar B. Inhibition of TNF-α Restores Muscle Force, Inhibits Inflammation, and Reduces Apoptosis of Traumatized Skeletal Muscles. Cells 2022; 11:cells11152397. [PMID: 35954240 PMCID: PMC9367740 DOI: 10.3390/cells11152397] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/31/2022] [Accepted: 08/02/2022] [Indexed: 02/06/2023] Open
Abstract
Background: Muscle injuries are common in humans and are often associated with irrecoverable damage and disability. Upon muscle injury, TNF-α signaling pathways modulate the healing process and are predominantly associated with tissue degradation. In this study we assumed that TNF-α inhibition could reduce the TNF-α-associated tissue degradation after muscle injury. Materials and methods: Therefore, the left soleus muscle of 42 male Wistar rats was injured using a standardized open muscle injury model. All rats were treated immediately after injury either with infliximab (single i.p. injection; 10 mg/kg b.w.) or saline solution i.p. Final measurements were conducted at day one, four, and 14 post injury. The muscle force, the muscle cell proliferation, the muscle cell coverage as well as the myofiber diameter served as read out parameters of our experiment. Results: Systemic application of infliximab could significantly reduce the TNF-α levels in the injured muscle at day four upon trauma compared to saline treated animals. The ratio of muscle weight to body weight was increased and the twitch muscle force showed a significant rise 14 days after trauma and TNF-α inhibition. Quantification of myofiber diameter in the penumbra zone showed a significant difference between both groups at day one and four after injury, indicated by muscle hypertrophy in the infliximab group. Planimetric analysis of the injured muscle at day 14 revealed increased muscle tissue fraction in the infliximab group compared to the control animals. Muscle cell proliferation did not differ between both groups. Conclusions: These data provide evidence that the TNF-α blockade positively regulates the restauration of skeletal muscles upon injury.
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Affiliation(s)
- Ioannis Stratos
- Department of Orthopaedic Surgery, Julius-Maximilians University Wuerzburg, 97074 Wuerzburg, Germany
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany; (A.-K.B.); (A.G.); (T.M.)
- Correspondence:
| | - Ann-Kathrin Behrendt
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany; (A.-K.B.); (A.G.); (T.M.)
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany; (C.A.); (B.V.)
| | - Christian Anselm
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany; (C.A.); (B.V.)
| | - Aldebarani Gonzalez
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany; (A.-K.B.); (A.G.); (T.M.)
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany; (C.A.); (B.V.)
| | - Thomas Mittlmeier
- Department of Trauma, Hand and Reconstructive Surgery, University of Rostock, 18057 Rostock, Germany; (A.-K.B.); (A.G.); (T.M.)
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, 18057 Rostock, Germany; (C.A.); (B.V.)
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23
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Xie W, Lorenz M, Poosch F, Palme R, Zechner D, Vollmar B, Grambow E, Strüder D. 3D-printed lightweight dorsal skin fold chambers from PEEK reduce chamber-related animal distress. Sci Rep 2022; 12:11599. [PMID: 35803979 PMCID: PMC9270450 DOI: 10.1038/s41598-022-13924-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 05/30/2022] [Indexed: 11/16/2022] Open
Abstract
The dorsal skinfold chamber is one of the most important in vivo models for repetitive longitudinal assessment of microcirculation and inflammation. This study aimed to refine this model by introducing a new lightweight chamber made from polyetheretherketone (PEEK). Body weight, burrowing activity, distress, faecal corticosterone metabolites and the tilting angle of the chambers were analysed in mice carrying either a standard titanium chamber or a PEEK chamber. Data was obtained before chamber preparation and over a postoperative period of three weeks. In the early postoperative phase, reduced body weight and increased faecal corticosterone metabolites were found in mice with titanium chambers. Chamber tilting and tilting-related complications were reduced in mice with PEEK chambers. The distress score was significantly increased in both groups after chamber preparation, but only returned to preoperative values in mice with PEEK chambers. In summary, we have shown that light chambers reduce animal distress and may extend the maximum dorsal skinfold chamber observation time. Chambers made of PEEK are particularly suitable for this purpose: They are autoclavable, sufficiently stable to withstand rodent bites, inexpensive, and widely available through 3D printing.
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Affiliation(s)
- Wentao Xie
- Institute for Experimental Surgery, Rostock University Medical Center, 18057, Rostock, Germany.,Department of Vascular and Thyroid Surgery, Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Matthias Lorenz
- Faculty of Engineering, Technology, Business and Design, University of Applied Sciences, 23966, Wismar, Germany
| | - Friederike Poosch
- Department of Otorhinolaryngology, Head and Neck Surgery "Otto Koerner", Rostock University Medical Center, 18057, Rostock, Germany
| | - Rupert Palme
- Unit of Physiology, Pathophysiology and Experimental Endocrinology, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, 1210, Vienna, Austria
| | - Dietmar Zechner
- Institute for Experimental Surgery, Rostock University Medical Center, 18057, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, 18057, Rostock, Germany
| | - Eberhard Grambow
- Institute for Experimental Surgery, Rostock University Medical Center, 18057, Rostock, Germany. .,Department of General, Visceral, Thoracic, Vascular and Transplantation Surgery, Rostock University Medical Center, Schillingallee 35, 18057, Rostock, Germany.
| | - Daniel Strüder
- Institute for Experimental Surgery, Rostock University Medical Center, 18057, Rostock, Germany.,Department of Otorhinolaryngology, Head and Neck Surgery "Otto Koerner", Rostock University Medical Center, 18057, Rostock, Germany
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Reiner J, Thiery J, Held J, Berlin P, Skarbaliene J, Vollmar B, Jaster R, Eriksson PO, Lamprecht G, Witte M. The dual GLP-1 and GLP-2 receptor agonist dapiglutide promotes barrier function in murine short bowel. Ann N Y Acad Sci 2022; 1514:132-141. [PMID: 35580981 DOI: 10.1111/nyas.14791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Short bowel syndrome can occur after extensive intestinal resection, causing intestinal insufficiency or intestinal failure, which requires long-term parenteral nutrition. Glucagon-like peptide-2 (GLP-2) pharmacotherapy is now clinically used to reduce the disease burden of intestinal failure. However, many patients still cannot be weaned off from parenteral nutrition completely. The novel dual GLP-1 and GLP-2 receptor agonist dapiglutide has previously been shown to be highly effective in a preclinical murine short bowel model. Here, we studied the effects of dapiglutide on intestinal epithelial barrier function. In the jejunum, dapiglutide increased claudin-7 expression and tightened the paracellular tight junction leak pathway. At the same time, dapiglutide promoted paracellular tight junction cation size selectivity in the jejunum. This was paralleled by extension of the cation selective tight junction proteins claudin-2 and claudin-10b and preserved claudin-15 expression and localization along the crypt-villus axis in the jejunum. In the colon, no barrier effects from dapiglutide were observed. In the colon, dapiglutide attenuated the short bowel-associated, compensatorily increased epithelial sodium channel activity, likely secondary, by improved volume status. Future studies are needed to address the intestinal adaptation of the colon.
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Affiliation(s)
- Johannes Reiner
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, Germany
| | - Johanna Thiery
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, Germany
| | - Jascha Held
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, Germany
| | - Peggy Berlin
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, Germany
| | | | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Robert Jaster
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, Germany
| | | | - Georg Lamprecht
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, Germany
| | - Maria Witte
- Department of General, Thoracic, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
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25
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Kumstel S, Schreiber T, Goldstein L, Stenzel J, Lindner T, Joksch M, Zhang X, Wendt EHU, Schönrogge M, Krause B, Vollmar B, Zechner D. Targeting pancreatic cancer with combinatorial treatment of CPI-613 and inhibitors of lactate metabolism. PLoS One 2022; 17:e0266601. [PMID: 35452495 PMCID: PMC9032382 DOI: 10.1371/journal.pone.0266601] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 03/23/2022] [Indexed: 12/28/2022] Open
Abstract
Pancreatic cancer is the fourth leading cause of cancer death, with a 5-year survival rate of 10%. A stagnant high mortality rate over the last decades highlights the need for innovative therapeutic approaches. Pancreatic tumors pursue an altered metabolism in order to maintain energy generation under low nutrient influx and hypoxic conditions. Targeting these metabolic strategies might therefore be a reasonable therapeutic approach for pancreatic cancer. One promising agent is CPI- 613, a potent inhibitor of two enzymes of the tricarboxylic acid cycle. The present study evaluated the anti-cancerous efficacy of CPI-613 in combination with galloflavin, a lactate dehydrogenase inhibitor or with alpha-cyano-4-hydroxycinnamic acid, an inhibitor of monocarboxylate transporters. The efficacy of both combination therapies was tested in vitro on one human and two murine pancreatic cancer cell lines and in vivo in an orthotopic pancreatic cancer model. Tumor progression was evaluated by MRI and 18F-FDG PET-CT. Both combinatorial treatments demonstrated in vitro a significant inhibition of pancreatic cancer cell proliferation and induction of cell death. In contrast to the in vitro results, both combination therapies did not significantly reduce tumor growth in vivo. The in vitro results suggest that a combined inhibition of different metabolic pathways might be a promising approach for cancer therapy. However, the in vivo experiments indicate that applying a higher dosage or using other drugs targeting these metabolic pathways might be more promising.
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Affiliation(s)
- Simone Kumstel
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Tim Schreiber
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Lea Goldstein
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, University Medical Center, Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, University Medical Center, Rostock, Germany
| | - Markus Joksch
- Core Facility Multimodal Small Animal Imaging, University Medical Center, Rostock, Germany
| | - Xianbin Zhang
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Edgar Heinz Uwe Wendt
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Maria Schönrogge
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Bernd Krause
- Department of Nuclear Medicine, University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Dietmar Zechner
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
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26
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Bernhardt T, Kriesen S, Manda K, Schlie C, Panzer R, Hildebrandt G, Vollmar B, Emmert S, Boeckmann L. Induction of Radiodermatitis in Nude Mouse Model using Gamma Irradiator IBL 637. Skin Pharmacol Physiol 2022; 35:224-234. [PMID: 35417908 PMCID: PMC9254314 DOI: 10.1159/000524596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 04/11/2022] [Indexed: 11/19/2022]
Abstract
Introduction Acute radiodermatitis is a common, though severe, side effect of radiotherapy against cancer that may lead to an interruption or even abortion of the radiotherapy. Mouse models provide an excellent tool to study pathomechanisms of a radiation-induced dermatitis as well as to test and develop novel innovative treatment strategies. Objective The aim of this study was to provide an overview of different mouse models and irradiation devices that have been used so far and to describe the process of the induction of a radiation dermatitis in an immune proficient nude mouse model (SKH1-Hr<sup>hr</sup>) using a IBL 637 cesium-137γ-ray machine. Methods This process includes the construction of a radiation shielding chamber, restricting the radiation to the right hind leg of the mouse, a dosimetry, and a dose finding study to identify the appropriate irradiation dose to induce a moderate radiation dermatitis. Results A radiation shielding chamber was successfully constructed allowing selective irradiation of the right hind leg. A moderate radiodermatitis is induced with irradiation doses in the range of 60–70 Gy under the here described conditions. Symptoms peak about 8 days after irradiation and decrease relatively quickly thereafter. Histological analyses confirmed typical signs of inflammation. Conclusion This study describes for the first time a protocol to induce a moderate radiodermatitis in the nude mouse model SKH1-Hr<sup>hr</sup> using a IBL 637 gamma irradiator. This protocol will allow researchers to study novel treatment strategies to alleviate the burden of a radiodermatitis as a side effect of cancer treatment.
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Affiliation(s)
- Thoralf Bernhardt
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Stephan Kriesen
- Department of Radiotherapy and Radiation Oncology, University Medical Center Rostock, Rostock, Germany
| | - Katrin Manda
- Department of Radiotherapy and Radiation Oncology, University Medical Center Rostock, Rostock, Germany
| | - Christin Schlie
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany
| | - Rüdiger Panzer
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Guido Hildebrandt
- Department of Radiotherapy and Radiation Oncology, University Medical Center Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany
| | - Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Lars Boeckmann
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
- *Lars Boeckmann,
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27
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Dor FJMF, Vollmar B. European Surgical Research: the future is bright! Eur Surg Res 2022; 63:1-2. [PMID: 35172303 DOI: 10.1159/000522641] [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] [Received: 02/15/2022] [Accepted: 02/15/2022] [Indexed: 11/19/2022]
Affiliation(s)
- Frank J M F Dor
- Imperial College Renal and Transplant Centre, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Brigitte Vollmar
- University Medicine Rostock, Institute for Experimental Surgery, Rostock, Germany
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28
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Alnajjar S, Nolte I, Schille JT, Sender S, Trakoolju N, Perez SV, Zechner D, Vollmar B, Junghanss C, Murua Escobar H. Establishment and Characterization of FusionRed Stable Transfected Canine Prostate Adenocarcinoma and Transitional Cell Carcinoma Cells. In Vivo 2022; 36:170-179. [PMID: 34972712 DOI: 10.21873/invivo.12688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/07/2021] [Accepted: 11/14/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Cancer cell inoculation is routinely used to evaluate novel therapeutic approaches in vivo. However, without reporter genes enabling deep tissue imaging, study of early tumor progression and therapeutic responses is often limited. We describe the establishment and characterization of two canine cancer cell lines stably expressing red fluorescence proteins as tools for later in vivo imaging. MATERIALS AND METHODS Two red fluorescence cell lines were generated by plasmid transfection. Fluorescence protein expression was confirmed by flow cytometry and microscopy. Deep tissue imaging was demonstrated in mice using a NightOWL LB 983. Gene expression changes after transfection were analyzed by RNAseq. RESULTS Both cell lines were detectable in vivo by subcutaneous injection of 1×106 cells. RNAseq revealed up to 2005 transfection-induced differentially expressed genes but no significant changes in cellular key pathways. CONCLUSION The fluorescent cell lines provide a solid basis for future in vivo studies on canine cancer.
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Affiliation(s)
- Suhayla Alnajjar
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany.,Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | - Ingo Nolte
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Jan Torben Schille
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany.,Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | - Sina Sender
- Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | - Nares Trakoolju
- Research Institute for Farm Animal Biology (FBN), Institute of Genome Biology, Dummerstorf, Germany
| | - Simon Villa Perez
- Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | - Dietmar Zechner
- Institute for Experimental Surgery, University of Medicine Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Medicine Rostock, Rostock, Germany
| | - Christian Junghanss
- Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | - Hugo Murua Escobar
- Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany; .,Comprehensive Cancer Center MV, Campus Rostock, Rostock, Germany
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29
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Weegh N, Zentrich E, Zechner D, Struve B, Wassermann L, Talbot SR, Kumstel S, Heider M, Vollmar B, Bleich A, Häger C. Voluntary wheel running behaviour as a tool to assess the severity in a mouse pancreatic cancer model. PLoS One 2021; 16:e0261662. [PMID: 34941923 PMCID: PMC8699632 DOI: 10.1371/journal.pone.0261662] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 12/08/2021] [Indexed: 01/07/2023] Open
Abstract
Laboratory animals frequently undergo routine experimental procedures such as handling, restraining and injections. However, as a known source of stress, these procedures potentially impact study outcome and data quality. In the present study, we, therefore, performed an evidence-based severity assessment of experimental procedures used in a pancreatic cancer model including surgical tumour induction and subsequent chemotherapeutic treatment via repeated intraperitoneal injections. Cancer cell injection into the pancreas was performed during a laparotomy under general anaesthesia. After a four-day recovery phase, mice received either drug treatment (galloflavin and metformin) or the respective vehicle substances via daily intraperitoneal injections. In addition to clinical scoring, an automated home-cage monitoring system was used to assess voluntary wheel running (VWR) behaviour as an indicator of impaired well-being. After surgery, slightly elevated clinical scores and minimal body weight reductions, but significantly decreased VWR behaviour were observed. During therapy, body weight declined in response to chemotherapy, but not after vehicle substance injection, while VWR activity was decreased in both cases. VWR behaviour differed between treatment groups and revealed altered nightly activity patterns. In summary, by monitoring VWR a high impact of repeated injections on the well-being of mice was revealed and substance effects on well-being were distinguishable. However, no differences in tumour growth between treatment groups were observed. This might be due to the severity of the procedures uncovered in this study, as exaggerated stress responses are potentially confounding factors in preclinical studies. Finally, VWR was a more sensitive indicator of impairment than clinical scoring in this model.
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Affiliation(s)
- Nora Weegh
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Eva Zentrich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Dietmar Zechner
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Birgitta Struve
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Laura Wassermann
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Steven Roger Talbot
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Simone Kumstel
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Miriam Heider
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - André Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Christine Häger
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
- * E-mail:
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Strüder D, Lachmann C, van Bonn SM, Grambow E, Schraven SP, Mlynski R, Vollmar B. The Dorsal Skinfold Chamber as a New Tympanic Membrane Wound Healing Model: Intravital Insights into the Pathophysiology of Epithelialized Wounds. Eur Surg Res 2021; 63:1-15. [PMID: 34856545 PMCID: PMC9808650 DOI: 10.1159/000519774] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 09/05/2021] [Indexed: 01/07/2023]
Abstract
BACKGROUND Tympanic membrane perforations (TMPs) are a common complication of trauma and infection. Persisting perforations result from the unique location of the tympanic membrane. The wound is surrounded by air of the middle ear and the external auditory canal. The inadequate wound bed, growth factor, and blood supply lead to circular epithelialization of the perforation's edge and premature interruption of defect closure. Orthotopic animal models use mechanical or chemical tympanic membrane laceration to identify bioactive wound dressings and overcome premature epithelialization. However, all orthotopic models essentially lack repetitive visualization of the biomaterial-wound interface. Therefore, recent progress in 3D printing of customized wound dressings has not yet been transferred to the unique wound setup of the TMP. Here, we present a novel application for the mice dorsal skinfold chamber (DSC) with an epithelialized full-thickness defect as TMP model. METHODS A circular 2-mm defect was cut into the extended dorsal skinfold using a biopsy punch. The skinfold was either perforated through both skin layers without prior preparation or perforated on 1 side, following resection of the opposing skin layer. In both groups, the wound was sealed with a coverslip or left unclosed (n = 4). All animals were examined for epithelialization of the edge (histology), size of the perforation (planimetry), neovascularization (repetitive intravital fluorescence microscopy), and inflammation (immunohistology). RESULTS The edge of the perforation was overgrown by the cornified squamous epithelium in all pre-parations. Reduction in the perforation's size was enhanced by application of a coverslip. Microsurgical preparation before biopsy punch perforation and sealing with a coverslip enabled repetitive high-quality intravital fluorescence microscopy. However, spontaneous reduction of the perforation occurred frequently. Therefore, the direct biopsy punch perforation without microsurgical preparation was favorable: spontaneous reduction did not occur throughout 21 days. Moreover, the visualization of the neovascularization was sufficient in intravital microscopy. CONCLUSIONS The DSC full-thickness defect is a valuable supplement to orthotopic TMP models. Repetitive intravital microscopy of the epithelialized edge enables investigation of the underlying pathophysiology during the transition from the inflammation to the proliferation phase of wound healing. Using established analysis procedures, the present model provides an effective platform for the screening of bioactive materials and transferring progress in tissue engineering to the special conditions of tympanic membrane wound healing.
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Affiliation(s)
- Daniel Strüder
- Department of Otorhinolaryngology, Head and Neck Surgery “Otto Körner”, Rostock University Medical Center, Rostock, Germany,Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany,*Daniel Strüder,
| | - Christoph Lachmann
- Department of Otorhinolaryngology, Head and Neck Surgery “Otto Körner”, Rostock University Medical Center, Rostock, Germany
| | - Sara Maria van Bonn
- Department of Otorhinolaryngology, Head and Neck Surgery “Otto Körner”, Rostock University Medical Center, Rostock, Germany
| | - Eberhard Grambow
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany,Department of General, Visceral, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
| | - Sebastian P. Schraven
- Department of Otorhinolaryngology, Head and Neck Surgery “Otto Körner”, Rostock University Medical Center, Rostock, Germany
| | - Robert Mlynski
- Department of Otorhinolaryngology, Head and Neck Surgery “Otto Körner”, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Reiner J, Berlin P, Held J, Thiery J, Skarbaliene J, Griffin J, Russell W, Eriksson PO, Berner-Hansen M, Ehlers L, Vollmar B, Jaster R, Witte M, Lamprecht G. Dapiglutide, a novel dual GLP-1 and GLP-2 receptor agonist, attenuates intestinal insufficiency in a murine model of short bowel. JPEN J Parenter Enteral Nutr 2021; 46:1107-1118. [PMID: 34705281 DOI: 10.1002/jpen.2286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Extensive intestinal resection may lead to short bowel (SB) syndrome, resulting in intestinal insufficiency or intestinal failure (IF). Intestinal insufficiency and IF involve deficiency of the proglucagon-derived hormones glucagon-like peptide-1 (GLP-1) and GLP-2. Two major problems of SB are epithelial surface loss and accelerated transit. Standard treatment now targets intestinal adaptation with a GLP-2 analogue to enlarge absorptive surface area. It is possible that additional benefit can be gained from a combination of GLP-1 and GLP-2 activity, with the aim to enlarge intestinal surface area and slow intestinal transit. METHODS The GLP-1- and GLP-2-specific effects of the novel dual GLP-1 receptor (GLP-1R) and GLP-2 receptor (GLP-2R) agonist dapiglutide (rINN) were characterized in rodents. Furthermore, in a murine SB model of intestinal insufficiency with 40% ileocecal resection, the influence of dapiglutide on intestinal growth, body weight, food intake, volume status, and stool water content was tested against vehicle and sham-operated male mice. RESULTS Dapiglutide significantly improves oral glucose tolerance, reduces intestinal transit time, and promotes intestinal growth. In the SB mouse model, dapiglutide promotes body weight recovery, despite unchanged intake of liquid diet. Dapiglutide promotes significant intestinal growth, as indicated by significantly increased villus height as well as intestinal length. Furthermore, dapiglutide reduces stool water losses, resulting in reduced plasma aldosterone. CONCLUSION Dapiglutide possesses specific and potent GLP-1R and GLP-2R agonist effects in rodents. In the murine SB model, combined unimolecular GLP-1R and GLP-2R stimulation with dapiglutide potently attenuates intestinal insufficiency and potentially also IF.
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Affiliation(s)
- Johannes Reiner
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
| | - Peggy Berlin
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
| | - Jascha Held
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
| | - Johanna Thiery
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
| | | | | | - Wayne Russell
- Research and Development, Zealand Pharma, Søborg, 2860, Denmark
| | | | | | - Luise Ehlers
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Center, Rostock, 18057, Germany
| | - Robert Jaster
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
| | - Maria Witte
- Department of General, Visceral, Thoracic, Vascular and Transplantat Surgery, Rostock University Medical Center, Rostock, 18057, Germany
| | - Georg Lamprecht
- Division of Gastroenterology and Endocrinology, Rostock University Medical Center, Rostock, 18057, Germany
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Power Guerra N, Parveen A, Bühler D, Brauer DL, Müller L, Pilz K, Witt M, Glass Ä, Bajorat R, Janowitz D, Wolkenhauer O, Vollmar B, Kuhla A. Fibroblast Growth Factor 21 as a Potential Biomarker for Improved Locomotion and Olfaction Detection Ability after Weight Reduction in Obese Mice. Nutrients 2021; 13:nu13092916. [PMID: 34578793 PMCID: PMC8470262 DOI: 10.3390/nu13092916] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/19/2021] [Accepted: 08/20/2021] [Indexed: 12/11/2022] Open
Abstract
Obesity is one of the most challenging diseases of the 21st century and is accompanied by behavioural disorders. Exercise, dietary adjustments, or time-restricted feeding are the only successful long-term treatments to date. Fibroblast growth factor 21 (FGF21) plays a key role in dietary regulation, but FGF21 resistance is prevalent in obesity. The aim of this study was to investigate in obese mice whether weight reduction leads to improved behaviour and whether these behavioural changes are associated with decreased plasma FGF21 levels. After establishing a model for diet-induced obesity, mice were subjected to three different interventions for weight reduction, namely dietary change, treadmill exercise, or time-restricted feeding. In this study, we demonstrated that only the combination of dietary change and treadmill exercise affected all parameters leading to a reduction in weight, fat, and FGF21, as well as less anxious behaviour, higher overall activity, and improved olfactory detection abilities. To investigate the interrelationship between FGF21 and behavioural parameters, feature selection algorithms were applied designating FGF21 and body weight as one of five highly weighted features. In conclusion, we concluded from the complementary methods that FGF21 can be considered as a potential biomarker for improved behaviour in obese mice after weight reduction.
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Affiliation(s)
- Nicole Power Guerra
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, Schillingallee 69a, 18057 Rostock, Germany; (N.P.G.); (A.P.); (D.B.); (L.M.); (B.V.)
- Department of Anatomy, Rostock University Medical Centre, Gertrudenstraße 9, 18057 Rostock, Germany;
| | - Alisha Parveen
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, Schillingallee 69a, 18057 Rostock, Germany; (N.P.G.); (A.P.); (D.B.); (L.M.); (B.V.)
| | - Daniel Bühler
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, Schillingallee 69a, 18057 Rostock, Germany; (N.P.G.); (A.P.); (D.B.); (L.M.); (B.V.)
| | - David Leon Brauer
- Department of Systems Biology and Bioinformatics, University of Rostock, Ulmenstraße 69, 18057 Rostock, Germany; (D.L.B.); (O.W.)
| | - Luisa Müller
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, Schillingallee 69a, 18057 Rostock, Germany; (N.P.G.); (A.P.); (D.B.); (L.M.); (B.V.)
- Department of Psychosomatic Medicine and Psychotherapy, Rostock University Medical Centre, Gehlsheimerstraße 20, 18147 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, Gehlsheimerstraße 20, 18147 Rostock, Germany
| | - Kristin Pilz
- Department of Psychiatry, University of Greifswald, Ellernholzstraße 1-2, 17489 Greifswald, Germany; (K.P.); (D.J.)
| | - Martin Witt
- Department of Anatomy, Rostock University Medical Centre, Gertrudenstraße 9, 18057 Rostock, Germany;
| | - Änne Glass
- Institute for Biostatistics and Informatics, Rostock University Medical Centre, Ernst-Heydemann-Straße 8, 18057 Rostock, Germany;
| | - Rika Bajorat
- Department of Anesthesiology and Intensive Care Medicine, Rostock University Medical Centre, Schillingallee 35, 18057 Rostock, Germany;
| | - Deborah Janowitz
- Department of Psychiatry, University of Greifswald, Ellernholzstraße 1-2, 17489 Greifswald, Germany; (K.P.); (D.J.)
| | - Olaf Wolkenhauer
- Department of Systems Biology and Bioinformatics, University of Rostock, Ulmenstraße 69, 18057 Rostock, Germany; (D.L.B.); (O.W.)
- Leibniz-Institute for Food Systems Biology, Technical University of Munich, Lise-Meitner-Straße 34, 85354 Freising, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, Schillingallee 69a, 18057 Rostock, Germany; (N.P.G.); (A.P.); (D.B.); (L.M.); (B.V.)
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, Gehlsheimerstraße 20, 18147 Rostock, Germany
| | - Angela Kuhla
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, Schillingallee 69a, 18057 Rostock, Germany; (N.P.G.); (A.P.); (D.B.); (L.M.); (B.V.)
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, Gehlsheimerstraße 20, 18147 Rostock, Germany
- Correspondence: ; Tel.: +49-381-494-2503
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Kordt M, Trautmann I, Schlie C, Lindner T, Stenzel J, Schildt A, Boeckmann L, Bekeschus S, Kurth J, Krause BJ, Vollmar B, Grambow E. Multimodal Imaging Techniques to Evaluate the Anticancer Effect of Cold Atmospheric Pressure Plasma. Cancers (Basel) 2021; 13:2483. [PMID: 34069689 PMCID: PMC8161248 DOI: 10.3390/cancers13102483] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/14/2021] [Accepted: 05/16/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Skin cancer is the most frequent cancer worldwide and is divided into non-melanoma skin cancer, including basal cell carcinoma, as well as squamous cell carcinoma (SCC) and malignant melanoma (MM). METHODS This study evaluates the effects of cold atmospheric pressure plasma (CAP) on SCC and MM in vivo, employing a comprehensive approach using multimodal imaging techniques. Longitudinal MR and PET/CT imaging were performed to determine the anatomic and metabolic tumour volume over three-weeks in vivo. Additionally, the formation of reactive species after CAP treatment was assessed by non-invasive chemiluminescence imaging of L-012. Histological analysis and immunohistochemical staining for Ki-67, ApopTag®, F4/80, CAE, and CD31, as well as protein expression of PCNA, caspase-3 and cleaved-caspase-3, were performed to study proliferation, apoptosis, inflammation, and angiogenesis in CAP-treated tumours. RESULTS As the main result, multimodal in vivo imaging revealed a substantial reduction in tumour growth and an increase in reactive species after CAP treatment, in comparison to untreated tumours. In contrast, neither the markers for apoptosis, nor the metabolic activity of both tumour entities was affected by CAP. CONCLUSIONS These findings propose CAP as a potential adjuvant therapy option to established standard therapies of skin cancer.
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Affiliation(s)
- Marcel Kordt
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (I.T.); (C.S.); (B.V.); (E.G.)
| | - Isabell Trautmann
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (I.T.); (C.S.); (B.V.); (E.G.)
| | - Christin Schlie
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (I.T.); (C.S.); (B.V.); (E.G.)
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (T.L.); (J.S.); (A.S.); (B.J.K.)
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (T.L.); (J.S.); (A.S.); (B.J.K.)
| | - Anna Schildt
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (T.L.); (J.S.); (A.S.); (B.J.K.)
| | - Lars Boeckmann
- Clinic and Policlinic for Dermatology and Venereology, Rostock University Medical Center, 18057 Rostock, Germany;
| | - Sander Bekeschus
- Center for innovation competence (ZIK) plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany;
| | - Jens Kurth
- Department of Nuclear Medicine, Rostock University Medical Center, 18055 Rostock, Germany;
| | - Bernd J. Krause
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (T.L.); (J.S.); (A.S.); (B.J.K.)
- Department of Nuclear Medicine, Rostock University Medical Center, 18055 Rostock, Germany;
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (I.T.); (C.S.); (B.V.); (E.G.)
| | - Eberhard Grambow
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (I.T.); (C.S.); (B.V.); (E.G.)
- Department for General, Visceral-, Vascular- and Transplantation Surgery, Rostock University Medical Center, 18057 Rostock, Germany
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Müller L, Power Guerra N, Stenzel J, Rühlmann C, Lindner T, Krause BJ, Vollmar B, Teipel S, Kuhla A. Long-Term Caloric Restriction Attenuates β-Amyloid Neuropathology and Is Accompanied by Autophagy in APPswe/PS1delta9 Mice. Nutrients 2021; 13:nu13030985. [PMID: 33803798 PMCID: PMC8003277 DOI: 10.3390/nu13030985] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 02/04/2021] [Revised: 03/09/2021] [Accepted: 03/16/2021] [Indexed: 12/14/2022] Open
Abstract
Caloric restriction (CR) slows the aging process, extends lifespan, and exerts neuroprotective effects. It is widely accepted that CR attenuates β-amyloid (Aβ) neuropathology in models of Alzheimer's disease (AD) by so-far unknown mechanisms. One promising process induced by CR is autophagy, which is known to degrade aggregated proteins such as amyloids. In addition, autophagy positively regulates glucose uptake and may improve cerebral hypometabolism-a hallmark of AD-and, consequently, neural activity. To evaluate this hypothesis, APPswe/PS1delta9 (tg) mice and their littermates (wild-type, wt) underwent CR for either 16 or 68 weeks. Whereas short-term CR for 16 weeks revealed no noteworthy changes of AD phenotype in tg mice, long-term CR for 68 weeks showed beneficial effects. Thus, cerebral glucose metabolism and neuronal integrity were markedly increased upon 68 weeks CR in tg mice, indicated by an elevated hippocampal fluorodeoxyglucose [18F] ([18F]FDG) uptake and increased N-acetylaspartate-to-creatine ratio using positron emission tomography/computer tomography (PET/CT) imaging and magnet resonance spectroscopy (MRS). Improved neuronal activity and integrity resulted in a better cognitive performance within the Morris Water Maze. Moreover, CR for 68 weeks caused a significant increase of LC3BII and p62 protein expression, showing enhanced autophagy. Additionally, a significant decrease of Aβ plaques in tg mice in the hippocampus was observed, accompanied by reduced microgliosis as indicated by significantly decreased numbers of iba1-positive cells. In summary, long-term CR revealed an overall neuroprotective effect in tg mice. Further, this study shows, for the first time, that CR-induced autophagy in tg mice accompanies the observed attenuation of Aβ pathology.
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Affiliation(s)
- Luisa Müller
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (L.M.); (N.P.G.); (C.R.); (B.V.)
- Department of Psychosomatic Medicine and Psychotherapy, University of Rostock, 18147 Rostock, Germany;
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), University of Rostock, 18147 Rostock, Germany
| | - Nicole Power Guerra
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (L.M.); (N.P.G.); (C.R.); (B.V.)
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (J.S.); (T.L.); (B.J.K.)
| | - Claire Rühlmann
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (L.M.); (N.P.G.); (C.R.); (B.V.)
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (J.S.); (T.L.); (B.J.K.)
| | - Bernd J. Krause
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (J.S.); (T.L.); (B.J.K.)
- Department of Nuclear Medicine, Rostock University Medical Center, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (L.M.); (N.P.G.); (C.R.); (B.V.)
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, 18057 Rostock, Germany; (J.S.); (T.L.); (B.J.K.)
| | - Stefan Teipel
- Department of Psychosomatic Medicine and Psychotherapy, University of Rostock, 18147 Rostock, Germany;
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), University of Rostock, 18147 Rostock, Germany
- German Center for Neurodegenerative Diseases (DZNE)–Rostock/Greifswald, 18147 Rostock and 17489 Greifswald, Germany
| | - Angela Kuhla
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (L.M.); (N.P.G.); (C.R.); (B.V.)
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), University of Rostock, 18147 Rostock, Germany
- Correspondence: ; Tel.: +49-381-494-2503
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Rühlmann C, Dannehl D, Brodtrück M, Adams AC, Stenzel J, Lindner T, Krause BJ, Vollmar B, Kuhla A. Neuroprotective Effects of the FGF21 Analogue LY2405319. J Alzheimers Dis 2021; 80:357-369. [PMID: 33554901 DOI: 10.3233/jad-200837] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 12/23/2022]
Abstract
BACKGROUND To date, there are no effective treatments for Alzheimer's disease (AD). Thus, a significant need for research of therapies remains. OBJECTIVE One promising pharmacological target is the hormone fibroblast growth factor 21 (FGF21), which is thought to be neuroprotective. A clinical candidate for medical use could be the FGF21 analogue LY2405319 (LY), which has a specificity and potency comparable to FGF21. METHODS The present study investigated the potential neuroprotective effect of LY via PPARγ/apoE/abca1 pathway, which is known to degrade amyloid-β (Aβ) plaques by using primary glial cells and hippocampal organotypic brain slice cultures (OBSCs) from 30- and 50-week-old transgenic APPswe/PS1dE9 (tg) mice. By LY treatment of 52-week-old tg mice with advanced Aβ deposition, we further aimed to elaborate the effect of LY on AD pathology in vivo. RESULTS LY application to primary glial cells caused an upregulation of pparγ, apoE, and abca1 mRNA expression and significantly decreased number and area of Aβ plaques in OBSCs. LY treatment in tg mice increased cerebral [18F] FDG uptake and N-acetylaspartate/creatine ratio indicating enhanced neuronal activity and integrity. Although LY did not reduce the number of Aβ plaques in tg mice, the number of iba1-positive cells was significantly decreased indicating reduced microgliosis. CONCLUSION These data identified LY in vitro as an activator of Aβ degrading genes leading to cerebral Aβ load amelioration in early and late AD pathology. Although Aβ plaque reduction by LY failed in vivo, LY may be used as therapeutic agent to treat AD-related neuroinflammation and impaired neuronal integrity.
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Affiliation(s)
- Claire Rühlmann
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - David Dannehl
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Marcus Brodtrück
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Andrew C Adams
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - Bernd J Krause
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany.,Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - Angela Kuhla
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Abstract
INTRODUCTION The volatile endogenous mediator hydrogen sulfide (H2S) is known to impair thrombus formation by affecting the activity of human platelets. Beside platelets and coagulation factors the endothelium is crucial during thrombogenesis. OBJECTIVE This study evaluates the effect of the H2S donor GYY4137 (GYY) on human umbilical vein endothelial cells (HUVECs) in vitro. METHODS Flow cytometry of resting, stimulated or GYY-treated and subsequently stimulated HUVECs was performed to analyse the expression of E-selectin, ICAM-1 and VCAM-1. To study a potential reversibility of the GYY action, E-selectin expression was further assessed on HUVECs that were stimulated 24 h after GYY exposure. A WST-1 assay was performed to study toxic effects of the H2S donor. By using the biotin switch assay, protein S-sulfhydration of GYY-exposed HUVECs was assessed. Further on, the effects of GYY on HUVEC migration and von Willebrand factor (vWF) secretion were assessed. RESULTS GYY treatment significantly reduced the expression of E-selectin and ICAM-1 but not of VCAM-1. When HUVECs were stimulated 24 h after GYY treatment, E-selectin expression was no longer affected. The WST-1 assay revealed no effects of GYY on endothelial cell viability. Furthermore, GYY impaired endothelial migration, reduced vWF secretion and increased protein S-sulfhydration. CONCLUSIONS Summarizing, GYY dose dependently and reversibly reduces the activity of endothelial cells.
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Affiliation(s)
- Eberhard Grambow
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Department of General, Visceral, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
| | - Gina Klee
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Wentao Xie
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Department of Vascular and Thyroid Surgery, Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Anhui, People's Republic of China
| | - Clemens Schafmayer
- Department of General, Visceral, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Power Guerra N, Müller L, Pilz K, Glatzel A, Jenderny D, Janowitz D, Vollmar B, Kuhla A. Dietary-Induced Low-Grade Inflammation in the Liver. Biomedicines 2020; 8:biomedicines8120587. [PMID: 33317065 PMCID: PMC7763065 DOI: 10.3390/biomedicines8120587] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 10/19/2020] [Revised: 11/26/2020] [Accepted: 12/07/2020] [Indexed: 02/07/2023] Open
Abstract
The literature describes a close correlation between metabolic disorders and abnormal immune responses, like low-grade inflammation (LGI), which may be one mechanistic link between obesity and various comorbidities, including non-alcoholic fatty liver disease (NAFLD). In our study, we investigated the influence of dietary composition on obesity-derived LGI in the liver. We used a dietary induced obesity mouse model of C57BL/6J mice fed with high fat diet (HFD, 60% fat, 20% protein, 20% carbohydrates) and two different controls. One was rich in carbohydrates (10% fat, 20% protein, 70% carbohydrates), further referred to as the control diet (CD), and the other one is referred to as the standard diet (SD), with a more balanced macronutrient content (9% fat, 33% protein, 58% carbohydrates). Our results showed a significant increased NAFLD activity score in HFD compared to both controls, but livers of the CD group also differed in their macroscopic appearance from healthy livers. Hepatic fat content showed significantly elevated cholesterol concentrations in the CD group. Histologic analysis of the cellular immune response in the liver showed no difference between HFD and CD and expression analysis of immunologic mediators like interleukin (IL)-1β, IL-6, IL-10 and tumor necrosis factor alpha also point towards a pro-inflammatory response to CD, comparable to LGI in HFD. Therefore, when studying diet-induced obesity with a focus on inflammatory processes, we encourage researchers to carefully select controls and not use a control diet disproportionally rich in carbohydrates.
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Affiliation(s)
- Nicole Power Guerra
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (N.P.G.); (L.M.); (A.G.); (D.J.); (B.V.)
| | - Luisa Müller
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (N.P.G.); (L.M.); (A.G.); (D.J.); (B.V.)
- Department of Psychosomatic Medicine and Psychotherapy, University of Rostock, 18147 Rostock, Germany
| | - Kristin Pilz
- Department of Psychiatry, University of Greifswald, 17489 Greifswald, Germany; (K.P.); (D.J.)
| | - Annika Glatzel
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (N.P.G.); (L.M.); (A.G.); (D.J.); (B.V.)
| | - Daniel Jenderny
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (N.P.G.); (L.M.); (A.G.); (D.J.); (B.V.)
| | - Deborah Janowitz
- Department of Psychiatry, University of Greifswald, 17489 Greifswald, Germany; (K.P.); (D.J.)
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (N.P.G.); (L.M.); (A.G.); (D.J.); (B.V.)
| | - Angela Kuhla
- Rudolf-Zenker-Institute for Experimental Surgery, Medical University Rostock, 18057 Rostock, Germany; (N.P.G.); (L.M.); (A.G.); (D.J.); (B.V.)
- Correspondence: ; Tel.: +49-381-494-2503
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Tang G, Seume N, Häger C, Kumstel S, Abshagen K, Bleich A, Vollmar B, Talbot SR, Zhang X, Zechner D. Comparing distress of mouse models for liver damage. Sci Rep 2020; 10:19814. [PMID: 33188220 PMCID: PMC7666197 DOI: 10.1038/s41598-020-76391-w] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 10/01/2020] [Indexed: 02/07/2023] Open
Abstract
In order to foster animal welfare as well as high quality of research, many countries regulate by law that the severity of animal experiments must be evaluated and considered when performing biomedical research. It is well accepted that multiple parameters rather than a single readout parameter should be applied to describe animal distress or suffering. However, since the performance of readout parameters for animal distress is rarely defined and methods for multivariate analysis have only in rare cases been used, it is not known which methodology is most appropriate to define animal distress. This study used receiver operating characteristic curve analysis to quantify the performance of burrowing activity, body weight change and a distress score of mice after induction of liver damage by bile duct ligation or carbon tetrachloride. In addition, Support Vector Machine classification was used to compare the distress of these mouse models. This approach demonstrated that bile duct ligation causes much more distress than carbon tetrachloride-induced liver damage. This study, therefore, provides a prototype how to compare two animal models by considering several readout parameters. In the future these or similar methods for multivariate analysis will be necessary, when assessing and comparing the severity of animal models.
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Affiliation(s)
- Guanglin Tang
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Nico Seume
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Christine Häger
- Institute for Laboratory Animal Science, Hannover Medical School, Hanover, Germany
| | - Simone Kumstel
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Kerstin Abshagen
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - André Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hanover, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Steven R Talbot
- Institute for Laboratory Animal Science, Hannover Medical School, Hanover, Germany.
| | - Xianbin Zhang
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany.
| | - Dietmar Zechner
- Rudolf-Zenker, Institute of Experimental Surgery, Rostock University Medical Center, Rostock, Germany.
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Abstract
Background Several studies suggest a role for EPA- and DHA-derived pro-resolving mediators like resolvins in reversing metabolic and inflammatory disturbances seen in various chronic diseases. Here, we investigated the effects of resolvin D1 (RvD1) on bile duct ligation (BDL)-induced cholestatic liver injury. Methods Mice were treated daily with RvD1 or 0.1% ethanol (control) from the day of BDL until the final observation time points. Blood and liver tissue were collected 2, 5 and 14 days after BDL for different analyses. Results RvD1 treatment of mice had no impact on the extent of cholestatic liver injury upon BDL, neither in the acute phase nor in the progressive state of liver fibrosis. Although RvD1 treatment resulted in a significantly reduced activity of hepatic stellate cells as well as reduced deposition of extracellular matrix 2 days after BDL, mice were not protected from inflammation and further fibrosis progression. Conclusions These data indicate that RvD1 has a limited therapeutic potential to treat cholestatic liver diseases, as it has no significant impact on regression of hepatic necroinflammation and fibrotic changes in bile duct-ligated mice.
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Affiliation(s)
- Kerstin Abshagen
- Institute for Experimental Surgery, University Medicine Rostock, Rostock, Germany
| | - Alexander Hartmann
- Institute for Experimental Surgery, University Medicine Rostock, Rostock, Germany
| | - Laura Grüner
- Institute for Experimental Surgery, University Medicine Rostock, Rostock, Germany
| | - Marie Liebig
- Institute for Experimental Surgery, University Medicine Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University Medicine Rostock, Rostock, Germany
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Grambow E, Klee G, Klar E, Vollmar B. The slow releasing hydrogen sulfide donor GYY4137 reduces neointima formation upon FeCl3 injury of the carotid artery in mice. Clin Hemorheol Microcirc 2020; 75:409-417. [PMID: 31929150 DOI: 10.3233/ch-190747] [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: 11/15/2022]
Abstract
INTRODUCTION Neointima formation is closely linked to vascular stenosis and occurs after endothelial damage. Hydrogen sulfide is an endogenous pleiotropic mediator with numerous positive effects on the cardio vascular system. OBJECTIVE This study evaluates the effect of the slow releasing hydrogen sulfide donor GYY4137 (GYY) on neointimal formation in vivo. METHODS The effect of GYY on neointimal formation in the carotid artery was studied in the FeCl3 injury model in GYY- or vehicle-treated mice. The carotid arteries were studied at days 7 and 21 after treatment by means of histology and immunohistochemistry for proliferating cell nuclear antigen (PCNA) and alpha smooth muscle actin (α-SMA). RESULTS GYY treatment significantly reduced the maximal diameter and the area of the newly formed neointima on both days 7 and 21 when compared to vehicle treatment. GYY additionally reduced the number of PCNA- and α-SMA-positive cells within the neointima on day 21 after FeCl3 injury of the carotid artery. CONCLUSIONS Summarizing, single treatment with the slow releasing hydrogen sulfide donor GYY reduced the extent of the newly formed neointima by affecting the cellular proliferation at the site of vascular injury.
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Affiliation(s)
- Eberhard Grambow
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany.,Department of General, Visceral, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
| | - Gina Klee
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Ernst Klar
- Department of General, Visceral, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Kuhla A, Meuth L, Stenzel J, Lindner T, Lappe C, Kurth J, Krause BJ, Teipel S, Glass Ä, Kundt G, Vollmar B. Longitudinal [ 18F]FDG-PET/CT analysis of the glucose metabolism in ApoE-deficient mice. EJNMMI Res 2020; 10:119. [PMID: 33029684 PMCID: PMC7541807 DOI: 10.1186/s13550-020-00711-4] [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: 07/29/2020] [Accepted: 09/24/2020] [Indexed: 11/15/2022] Open
Abstract
Background Strong line of evidence suggests that the increased risk to develop AD may at least be partly mediated by cholesterol metabolism. A key regulator of cholesterol transport is the Apolipoprotein E4 (ApoE4), which plays a fundamental role in neuronal maintenance and repair. Impaired function of ApoE4 may contribute to altered cerebral metabolism leading to higher susceptibility to neurodegeneration. Methods To determine a possible link between ApoE function and alterations in AD in the brain of Apolipoprotein E-deficient mice (ApoE−/−) in a longitudinal manner metabolic and neurochemical parameters were analyzed. Cortical metabolism was measured by 2-deoxy-2-[18F]fluoroglucose ([18F]FDG)-PET/CT and proton magnetic resonance spectroscopy (1H-MRS) served to record neurochemical status. Results By using [18F]FDG-PET/CT, we showed that brain metabolism declined significantly stronger with age in ApoE−/− versus wild type (wt) mice. This difference was particularly evident at the age of 41 weeks in almost each analyzed brain region. In contrast, the 1H-MRS-measured N-acetylaspartate to creatine ratio, a marker of neuronal viability, did not decline with age and did not differ between ApoE−/− and wt mice. Conclusion In summary, this longitudinal in vivo study shows for the first time that ApoE−/− mice depict cerebral hypometabolism without neurochemical alterations.
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Affiliation(s)
- Angela Kuhla
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
| | - Lou Meuth
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - Chris Lappe
- Institute of Diagnostic and Interventional Radiology, Pediatric and Neuroradiology, Rostock University Medical Center, Rostock, Germany.,German Center for Neurodegenerative Diseases (DZNE), Rostock, Greifswald, Germany
| | - Jens Kurth
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany
| | - Bernd J Krause
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany.,Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany
| | - Stefan Teipel
- German Center for Neurodegenerative Diseases (DZNE), Rostock, Greifswald, Germany.,Department of Psychosomatic Medicine, Rostock University Medical Center, Rostock, Germany
| | - Änne Glass
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Rostock University Medical Center, Rostock, Germany
| | - Guenther Kundt
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.,Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
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Kuhla A, Brichmann E, Rühlmann C, Thiele R, Meuth L, Vollmar B. Metformin Therapy Aggravates Neurodegenerative Processes in ApoE-/- Mice. J Alzheimers Dis 2020; 68:1415-1427. [PMID: 30909226 DOI: 10.3233/jad-181017] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [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: 11/15/2022]
Abstract
Epidemiological studies suggest that individuals with diabetes mellitus are at greater risk of developing Alzheimer's disease. A well-known insulin-sensitizing drug and the most widely prescribed oral medication for diabetes is metformin. There is evidence that metformin acts in a neuroprotective manner via the AMPK/mTOR pathway by inhibiting the tau phosphorylation. In addition, it is known that metformin upregulates Fgf21, which in turn activates the AMPK/mTOR pathway and mediates neuroprotection. Thus, metformin-induced Fgf21 release may be involved in AMPK/mTOR activation. However, some studies reported that metformin causes cognition impairment. Due to the controversial data on the neuroprotective properties of metformin, we treated Apolipoprotein E deficient (ApoE- /-) mice, a mouse model of tauopathy, with metformin for 18 weeks. Metformin-treated mice revealed increased expression of lipogenic genes, i.e., lxrα and srebp1c. In line with this, metformin caused an increase in plasma triglyceride leading to enhanced gliosis as indicated by an increase of GFAP-positive cells. Although the systemic Fgf21 concentration was increased, metformin did not activate the FgfR1c/AMPK/mTOR pathway suggesting a Fgf21-resistant state. Further, metformin-treated mice showed increased tau phosphorylation and reduced numbers of NeuN-and PSD95-positive cells. Thus, metformin-associated lipogenesis as well as inflammation aggravated neurodegenerative processes in ApoE- /- mice. Consequently, this study supports previous observations showing that metformin causes impairment of cognition.
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Affiliation(s)
- Angela Kuhla
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Elaine Brichmann
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Claire Rühlmann
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Robin Thiele
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Lou Meuth
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Dau M, Volprich L, Grambow E, Vollmar B, Frerich B, Al-Nawas B, Kämmerer PW. Collagen membranes of dermal and pericardial origin-In vivo evolvement of vascularization over time. J Biomed Mater Res A 2020; 108:2368-2378. [PMID: 32363796 DOI: 10.1002/jbm.a.36989] [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] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 03/29/2020] [Accepted: 04/04/2020] [Indexed: 02/06/2023]
Abstract
Aim of the study was to compare the evolvement of vascularization over time of collagen membranes (CMs) of dermal and pericardial origin in an in vivo animal study. Twenty-eight mice underwent implantation of three commercially available CM derived from porcine dermis (homogenous structure: CM1 (Control 1) and bilayer structure: CM2 [Control 2]), from porcine pericardium (CM3; Test 1) as well as CM3 sprayed with silica-enhanced nanostructured hydroxyapatite (CM4, Test 2). After 3, 6, 9, and 12 days, intravital fluorescence microscopy was conducted for determination of capillary diameter, density, flow, and length. At Day 12, samples were examined immunohistologically for expression of fibroblast growth factor receptor 4 (FGFR4), CD11b, CD68, αSMA, and CD34. In all CM, intravital fluorescence microscopy over time showed increasing values for all parameters with the highest levels in CM4 and the lowest values in CM1. Significant lower amounts of FGFR4, CD11b, and CD68 were detected in CM4 when compared to CM2 (p < .05). In contrast to CM3, lower values of αSMA and higher numbers of CD34 positive-marked vessels were observed in CM4 (p < .05). In conclusion, dermal bilayer as well as pericardial CM seem to have a higher vascularization rate than dermal homogenous CM. Additional coating of pericardial CM with a silica-enhanced hydroxyapatite increases the speed of vascularization as well as biological remodeling processes.
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Affiliation(s)
- Michael Dau
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Lisann Volprich
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Eberhard Grambow
- Department for General-, Visceral-, Vascular- and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany
| | - Bernhard Frerich
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Bilal Al-Nawas
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Mainz, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Rostock, Rostock, Germany.,Department of Oral, Maxillofacial Plastic Surgery, University Medical Center Mainz, Mainz, Germany
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Kumstel S, Wendt EHU, Eichberg J, Talbot SR, Häger C, Zhang X, Abdelrahman A, Schönrogge M, Palme R, Bleich A, Vollmar B, Zechner D. Grading animal distress and side effects of therapies. Ann N Y Acad Sci 2020; 1473:20-34. [PMID: 32207155 DOI: 10.1111/nyas.14338] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 11/15/2019] [Revised: 01/30/2020] [Accepted: 03/05/2020] [Indexed: 12/14/2022]
Abstract
In order to combine high-quality research with minimal harm to animals, a prospective severity assessment for animal experiments is legally required in many countries. In addition, an assessment of the evidence-based severity level might allow realistic harm-benefit analysis and the appraisal of refinement methods. However, only a few examples describe the distress of animals by simple, cost-efficient, and noninvasive methods. We, therefore, evaluated the severity of an orthotopic mouse model for pancreatic cancer using C57BL/6J mice when pursuing two different chemotherapies. We assessed fecal corticosterone metabolites, body weight, distress score, and burrowing, as well as nesting activity. Moreover, we established a multifactorial model using multivariate logistic regression to describe animal distress. This multifactorial analysis revealed that metformin + galloflavin treatment caused higher distress than metformin + α-cyano-4-hydroxycinnamate therapy. Similar results were obtained by using the best cutoff calculated by Youden's J index when using only single parameters, such as burrowing activity or fecal corticosterone metabolite concentration. Thus, the present study revealed that single readout parameters, as well as multivariate analysis, can help to assess the severity of animal experiments and detect side effects of therapies.
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Affiliation(s)
- Simone Kumstel
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Edgar H U Wendt
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Johanna Eichberg
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Steven R Talbot
- Institute for Laboratory Animal Science, Hannover Medical School, Hanover, Germany
| | - Christine Häger
- Institute for Laboratory Animal Science, Hannover Medical School, Hanover, Germany
| | - Xianbin Zhang
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Ahmed Abdelrahman
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Maria Schönrogge
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Rupert Palme
- Unit of Physiology, Pathophysiology and Experimental Endocrinology, Department of Biomedical Sciences, University of Veterinary Medicine, Vienna, Austria
| | - André Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hanover, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
| | - Dietmar Zechner
- Rudolf-Zenker Institute of Experimental Surgery, University Medical Center, Rostock, Germany
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Gerlinger C, Oster M, Reyer H, Polley C, Vollmar B, Muráni E, Wimmers K, Wolf P. Effects of excessive or restricted phosphorus and calcium intake during early life on markers of bone architecture and composition in pigs. J Anim Physiol Anim Nutr (Berl) 2020; 105 Suppl 2:52-62. [PMID: 32180287 DOI: 10.1111/jpn.13286] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 10/06/2019] [Accepted: 11/08/2019] [Indexed: 12/11/2022]
Abstract
Sufficient supply of pigs with calcium (Ca) and phosphorus (P) is essential for animal health and welfare during the growth period. However, the P content in animal manure is considered as a cause of massive environmental problems in soil and aquatic ecosystems. To complement previous findings, the objective of this study is the investigation of effects of a reduced and increased Ca and P supplementation on bone mineralization and bone structure compared with the current dietary recommendation. Another aim is to find possible serum markers that would allow the assessment of adequacy of P supply for bone health during growth. The result validated that the recommended Ca and P supply is sufficient, without the addition of microbial phytases. However, addition of P has no further beneficial effects on bone stability, while P supplementation below the recommended level affects bone development and growth performance. Reduced P levels have consequences for cancellous bone density and trabecular architecture. Further fine-tuning of the P supply in conjunction with an appropriate Ca supply will contribute to a reduction in P waste and associated environmental impact while maintaining animal health and welfare.
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Affiliation(s)
- Christian Gerlinger
- Chair of Nutrition Physiology and Animal Nutrition, University of Rostock, Rostock, Germany.,Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - Michael Oster
- Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - Henry Reyer
- Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - Christian Polley
- Institute for Experimental Surgery, University of Rostock, Rostock, Germany.,Chair of Microfluidics, University of Rostock, Rostock, Germany
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, Rostock, Germany
| | - Eduard Muráni
- Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - Klaus Wimmers
- Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany.,Faculty of Agricultural and Environmental Sciences, University of Rostock, Rostock, Germany
| | - Petra Wolf
- Chair of Nutrition Physiology and Animal Nutrition, University of Rostock, Rostock, Germany
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Stenzel J, Rühlmann C, Lindner T, Polei S, Teipel S, Kurth J, Rominger A, Krause BJ, Vollmar B, Kuhla A. [ 18F]-florbetaben PET/CT Imaging in the Alzheimer's Disease Mouse Model APPswe/PS1dE9. Curr Alzheimer Res 2020; 16:49-55. [PMID: 30345916 DOI: 10.2174/1567205015666181022095904] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 06/28/2018] [Revised: 09/07/2018] [Accepted: 10/15/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND Positron-emission-tomography (PET) using 18F labeled florbetaben allows noninvasive in vivo-assessment of amyloid-beta (Aβ), a pathological hallmark of Alzheimer's disease (AD). In preclinical research, [18F]-florbetaben-PET has already been used to test the amyloid-lowering potential of new drugs, both in humans and in transgenic models of cerebral amyloidosis. The aim of this study was to characterize the spatial pattern of cerebral uptake of [18F]-florbetaben in the APPswe/ PS1dE9 mouse model of AD in comparison to histologically determined number and size of cerebral Aβ plaques. METHODS Both, APPswe/PS1dE9 and wild type mice at an age of 12 months were investigated by smallanimal PET/CT after intravenous injection of [18F]-florbetaben. High-resolution magnetic resonance imaging data were used for quantification of the PET data by volume of interest analysis. The standardized uptake values (SUVs) of [18F]-florbetaben in vivo as well as post mortem cerebral Aβ plaque load in cortex, hippocampus and cerebellum were analyzed. RESULTS Visual inspection and SUVs revealed an increased cerebral uptake of [18F]-florbetaben in APPswe/ PS1dE9 mice compared with wild type mice especially in the cortex, the hippocampus and the cerebellum. However, SUV ratios (SUVRs) relative to cerebellum revealed only significant differences in the hippocampus between the APPswe/PS1dE9 and wild type mice but not in cortex; this differential effect may reflect the lower plaque area in the cortex than in the hippocampus as found in the histological analysis. CONCLUSION The findings suggest that histopathological characteristics of Aβ plaque size and spatial distribution can be depicted in vivo using [18F]-florbetaben in the APPswe/PS1dE9 mouse model.
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Affiliation(s)
- J Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - C Rühlmann
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - T Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - S Polei
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany
| | - S Teipel
- German Center for Neurodegenerative Diseases (DZNE) - Rostock/Greifswald, Rostock, Germany, Department of Psychosomatic Medicine, University of Rostock, Rostock, Germany
| | - J Kurth
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany
| | - A Rominger
- Department of Nuclear Medicine, Inselspital, University Hospital Bern, Bern, Switzerland
| | - B J Krause
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany.,Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany
| | - B Vollmar
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Center, Rostock, Germany.,Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
| | - A Kuhla
- Institute for Experimental Surgery, Rostock University Medical Center, Rostock, Germany
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Semmler ML, Bekeschus S, Schäfer M, Bernhardt T, Fischer T, Witzke K, Seebauer C, Rebl H, Grambow E, Vollmar B, Nebe JB, Metelmann HR, von Woedtke T, Emmert S, Boeckmann L. Molecular Mechanisms of the Efficacy of Cold Atmospheric Pressure Plasma (CAP) in Cancer Treatment. Cancers (Basel) 2020; 12:cancers12020269. [PMID: 31979114 PMCID: PMC7072164 DOI: 10.3390/cancers12020269] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [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: 11/29/2019] [Revised: 01/16/2020] [Accepted: 01/20/2020] [Indexed: 12/30/2022] Open
Abstract
Recently, the potential use of cold atmospheric pressure plasma (CAP) in cancer treatment has gained increasing interest. Especially the enhanced selective killing of tumor cells compared to normal cells has prompted researchers to elucidate the molecular mechanisms for the efficacy of CAP in cancer treatment. This review summarizes the current understanding of how CAP triggers intracellular pathways that induce growth inhibition or cell death. We discuss what factors may contribute to the potential selectivity of CAP towards cancer cells compared to their non-malignant counterparts. Furthermore, the potential of CAP to trigger an immune response is briefly discussed. Finally, this overview demonstrates how these concepts bear first fruits in clinical applications applying CAP treatment in head and neck squamous cell cancer as well as actinic keratosis. Although significant progress towards understanding the underlying mechanisms regarding the efficacy of CAP in cancer treatment has been made, much still needs to be done with respect to different treatment conditions and comparison of malignant and non-malignant cells of the same cell type and same donor. Furthermore, clinical pilot studies and the assessment of systemic effects will be of tremendous importance towards bringing this innovative technology into clinical practice.
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Affiliation(s)
- Marie Luise Semmler
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Sander Bekeschus
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), 17489 Greifswald, Germany; (S.B.); (T.v.W.)
| | - Mirijam Schäfer
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Thoralf Bernhardt
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Tobias Fischer
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Katharina Witzke
- Oral & Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, 17489 Greifswald, Germany; (K.W.); (C.S.)
| | - Christian Seebauer
- Oral & Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, 17489 Greifswald, Germany; (K.W.); (C.S.)
| | - Henrike Rebl
- Department of Cell Biology, University Medical Center Rostock, 18057 Rostock, Germany; (H.R.); (J.B.N.)
| | - Eberhard Grambow
- Institute for Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (E.G.); (B.V.)
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (E.G.); (B.V.)
| | - J. Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock, 18057 Rostock, Germany; (H.R.); (J.B.N.)
| | - Hans-Robert Metelmann
- Oral & Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, 17489 Greifswald, Germany; (K.W.); (C.S.)
| | - Thomas von Woedtke
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), 17489 Greifswald, Germany; (S.B.); (T.v.W.)
| | - Steffen Emmert
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Lars Boeckmann
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
- Correspondence: ; Tel.: +49-381-494-9760
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Zhang X, Liu P, Shang Y, Kerndl H, Kumstel S, Gong P, Vollmar B, Zechner D. Metformin and LW6 impairs pancreatic cancer cells and reduces nuclear localization of YAP1. J Cancer 2020; 11:479-487. [PMID: 31897243 PMCID: PMC6930432 DOI: 10.7150/jca.33029] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 01/11/2019] [Accepted: 08/27/2019] [Indexed: 01/15/2023] Open
Abstract
The poor survival rate of pancreatic cancer is still a major challenge for the clinicians and their patients. In this study, we evaluated the efficacy of metformin, an inhibitor of oxidative phosphorylation, in combination with LW6, which impairs malate dehydrogenase 2 activities, in treating pancreatic cancer cells. We observed that this combinational therapy significantly reduced cell proliferation, migration, and significantly induced cell death when compared to cells treated by each monotherapy or Sham. In addition, we found that the combination of metformin and LW6 increased the phosphorylation of yes-associated protein 1 at serine 127 and attenuated the nuclear localization of this transcription factor. This combinatorial treatment also decreased the level of cellular yes-associated protein 1. This suggests that metformin in combination with LW6 impairs pancreatic cancer cells and reduces nuclear localization of yes-associated protein 1.
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Affiliation(s)
- Xianbin Zhang
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18059, Rostock, Germany.,Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jiyan Road 440, 250117, Jinan, China
| | - Peng Liu
- Department of General Surgery, Shenzhen University General Hospital, Xueyuan Road 1098, 518055, Shenzhen, China
| | - Yuru Shang
- Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jiyan Road 440, 250117, Jinan, China.,Molecular Oncology and Immunotherapy, Department of General Surgery, Rostock University Medical Center, Schillingallee 69, 18059, Rostock, Germany
| | - Hagen Kerndl
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18059, Rostock, Germany
| | - Simone Kumstel
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18059, Rostock, Germany
| | - Peng Gong
- Department of General Surgery, Shenzhen University General Hospital, Xueyuan Road 1098, 518055, Shenzhen, China
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18059, Rostock, Germany
| | - Dietmar Zechner
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18059, Rostock, Germany
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Reiner J, Berlin P, Wobar J, Schäffler H, Bannert K, Bastian M, Vollmar B, Jaster R, Lamprecht G, Witte M. Teduglutide Promotes Epithelial Tight Junction Pore Function in Murine Short Bowel Syndrome to Alleviate Intestinal Insufficiency. Dig Dis Sci 2020; 65:3521-3537. [PMID: 32072437 PMCID: PMC7661426 DOI: 10.1007/s10620-020-06140-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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] [Received: 12/13/2019] [Accepted: 02/09/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND In short bowel syndrome, epithelial surface loss results in impaired nutrient absorption and may lead to intestinal insufficiency or intestinal failure. Nucleotide oligomerization domain 2 (Nod2) dysfunction predisposes to the development of intestinal failure after intestinal resection and is associated with intestinal barrier defects. Epithelial barrier function is crucial for intestinal absorption and for intestinal adaptation in the short bowel situation. AIMS The aim of the study was to characterize the effects of the GLP-2 analogue Teduglutide in the small intestine in the presence and absence of Nod2 in a mouse model of short bowel syndrome. METHODS Mice underwent 40% ICR and were thereafter treated with Teduglutide versus vehicle injections. Survival, body weight, stool water, and sodium content and plasma aldosterone concentrations were determined. Intestinal and kidney tissue was examined with light and fluorescence microscopy, Ussing chamber studies and quantitative PCR in wild type and transgenic mice. RESULTS Teduglutide reduced intestinal failure incidence in Nod2 k.o. mice. In wt mice, Teduglutide attenuated intestinal insufficiency as indicated by reduced body weight loss and lower plasma aldosterone concentrations, lower stool water content, and lower stool sodium losses. Teduglutide treatment was associated with enhanced epithelial paracellular pore function and enhanced claudin-10 expression in tight junctions in the villus tips, where it colocalized with sodium-glucose cotransporter 1 (SGLT-1), which mediates Na-coupled glucose transport. CONCLUSIONS In the SBS situation, Teduglutide not only maximizes small intestinal mucosal hypertrophy but also partially restores small intestinal epithelial function through an altered distribution of claudin-10, facilitating sodium recirculation for Na-coupled glucose transport and water absorption.
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Affiliation(s)
- Johannes Reiner
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Peggy Berlin
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Jakob Wobar
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Holger Schäffler
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Karen Bannert
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Manuela Bastian
- Institute for Clinical Chemistry and Laboratory Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute of Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057 Rostock, Germany
| | - Robert Jaster
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Georg Lamprecht
- Division of Gastroenterology and Endocrinology, Department of Medicine II, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Maria Witte
- Department of General, Thoracic, Vascular and Transplantation Surgery, Rostock University Medical Center, Schillingallee 35, 18057 Rostock, Germany
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Liu W, Eczko JC, Otto M, Bajorat R, Vollmar B, Roesner JP, Wagner NM. Toll-like receptor 2-deficiency on bone marrow-derived cells augments vascular healing of murine arterial lesions. Life Sci 2019; 242:117189. [PMID: 31891724 DOI: 10.1016/j.lfs.2019.117189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 11/12/2019] [Revised: 12/12/2019] [Accepted: 12/16/2019] [Indexed: 11/30/2022]
Abstract
AIMS Neointimal hyperplasia contributes to arterial restenosis after percutaneous transluminal coronary angioplasty or vascular surgery. Neointimal thickening after arterial injury is determined by inflammatory processes. We investigated the role of the innate immune receptor toll-like receptor 2 (TLR2) in neointima formation after arterial injury in mice. MATERIALS AND METHODS Carotid artery injury was induced by 10% ferric chloride in C57Bl/6J wild type (WT), TLR2 deficient (B6.129-Tlr2tm1Kir/J, TLR2-/-) and WT mice treated with a TLR2 blocking antibody. 21 days after injury, carotid arteries were assessed histomorphometrically and for smooth muscle cell (SMC) content. To identify the contribution of circulating cells in mediating the effects of TLR2-deficiency, arterial injury was induced in WT/TLR2-/--chimeric mice and the paracrine modulation of bone marrow-derived cells from WT and TLR2-/- on SMC migration compared in vitro. KEY FINDINGS TLR2-/- mice and WT mice treated with TLR2 blocking antibodies exhibited reduced neointimal thickening (23.7 ± 4.2 and 6.5 ± 3.0 vs. 43.1 ± 5.9 μm, P < 0.05 and P < 0.01), neointimal area (5491 ± 1152 and 315 ± 76.7 vs. 13,756 ± 2627 μm2, P < 0.05 and P < 0.01) and less luminal stenosis compared to WT mice (8.5 ± 1.6 and 5.0 ± 1.3 vs. 22.4 ± 2.2%, both P < 0.001n = 4-8 mice/group). The phenotypes of TLR2-/- vs. WT mice were completely reverted in WT/TLR2-/- bone marrow chimeric mice (5.9 ± 1.5 μm neointimal thickness, 874.2 ± 290.2 μm2 neointima area and 2.7 ± 0.6% luminal stenoses in WT mice transplanted with TLR2-/- bone marrow vs. 23.6 ± 5.1 μm, 3555 ± 511 μm2 and 12.0 ± 1.3% in WT mice receiving WT bone marrow, all P < 0.05, n = 6/group). Neointimal lesions of WT and WT mice transplanted with TLR2-/- bone marrow chimeric mice showed increased numbers of SMC (10.8 ± 1.4 and 12.6 ± 1.4 vs. 3.8 ± 0.9 in TLR2-/- and 3.5 ± 1.1 cells in WT mice transplanted with TLR2-/- bone marrow, all P < 0.05, n = 6). WT bone marrow cells stimulated SMC migration more than TLR2-deficient bone marrow cells (1.7 ± 0.05 vs. 1.3 ± 0.06-fold, P < 0.05, n = 7) and this effect was aggravated by TLR2 stimulation and diminished by TLR2 blockade (1.1 ± 0.03-fold after stimulation with TLR2 agonists and 0.8 ± 0.02-fold after TLR2 blockade vs. control treated cells defined as 1.0, P < 0.05, n = 7). SIGNIFICANCE TLR2-deficiency on hematopoietic but not vessel wall resident cells augments vascular healing after arterial injury. Pharmacological blockade of TLR2 may thus be a promising therapeutic option to improve vessel patency after iatrogenic arterial injury.
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Affiliation(s)
- W Liu
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany
| | - J-C Eczko
- Department of Anesthesia and Intensive Care, University Medical Center Rostock, Rostock, Germany
| | - M Otto
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany
| | - R Bajorat
- Department of Anesthesia and Intensive Care, University Medical Center Rostock, Rostock, Germany
| | - B Vollmar
- Institute for Experimental Surgery, University Medical Center Rostock, Rostock, Germany
| | - J-P Roesner
- Department of Anesthesia and Intensive Care, University Medical Center Rostock, Rostock, Germany
| | - N-M Wagner
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany.
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