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Popescu CE, Zhang B, Sartoretti T, Spielhofer N, Skawran S, Heimer J, Messerli M, Sauter A, Huellner MW, Kaufmann PA, Burger IA, Maurer A. Evaluating the biodistribution for [ 68Ga]Ga-PSMA-11 and [ 18F]F-PSMA-1007 PET/CT with an inter- and intrapatient based analysis. EJNMMI Res 2024; 14:36. [PMID: 38578516 PMCID: PMC10997563 DOI: 10.1186/s13550-024-01097-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 03/15/2024] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND Liver uptake in [68Ga]Ga-PSMA-11 PET is used as an internal reference in addition to clinical parameters to select patients for [177Lu]Lu-PSMA-617 radioligand therapy (RLT). Due to increased demand, [68Ga]Ga-PSMA-11 was replaced by [18F]F-PSMA-1007, a more lipophilic tracer with different biodistribution and splenic uptake was suggested as a new internal reference. We compared the intra-patient tracer distribution between [68Ga]Ga-PSMA-11 and [18F]F-PSMA-1007. METHODS Fifty patients who underwent PET examinations in two centers with both [18F]F-PSMA-1007 and [68Ga]Ga-PSMA-11 within one year were included. Mean standardized uptake values (SUVmean) were obtained for liver, spleen, salivary glands, blood pool, and bone. Primary tumor, local recurrence, lymph node, bone or visceral metastasis were also assessed for intra- and inter-individual comparison. RESULTS Liver SUVmean was significantly higher with [18F]F-PSMA-1007 (11.7 ± 3.9) compared to [68Ga]Ga-PSMA-11 (5.4 ± 1.7, p < .05) as well as splenic SUVmean (11.2 ± 3.5 vs.8.1 ± 3.5, p < .05). The blood pool was comparable between the two scans. Malignant lesions did not show higher SUVmean on [18F]F-PSMA-1007. Intra-individual comparison of liver uptake between the two scans showed a linear association for liver uptake with SUVmean [68Ga]Ga-PSMA-11 = 0.33 x SUVmean [18F]F-PSMA-1007 + 1.52 (r = .78, p < .001). CONCLUSION Comparing biodistribution of [68Ga]Ga and [18F]F tracers, liver uptake on [68Ga]Ga-PSMA-11 PET is the most robust internal reference value. Liver uptake of [18F]F-PSMA-1007 was significantly higher, but so was the splenic uptake. The strong intra-individual association of hepatic accumulation between the two scans may allow using of a conversion factor for [18F]F-PSMA-1007 as a basis for RLT selection.
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Affiliation(s)
- Cristina E Popescu
- Department of Nuclear Medicine, Cantonal Hospital Baden, Baden, Switzerland
| | - Boya Zhang
- Department of Health Sciences and technology, ETH Zurich, Zurich, Switzerland
| | - Thomas Sartoretti
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland
| | - Noel Spielhofer
- Department of Nuclear Medicine, Cantonal Hospital Baden, Baden, Switzerland
| | - Stephan Skawran
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland
| | - Jakob Heimer
- Department of Mathematics, Seminar for Statistics, ETH Zurich, Zurich, Switzerland
| | - Michael Messerli
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland
| | - Alexander Sauter
- Department of Nuclear Medicine, Cantonal Hospital Baden, Baden, Switzerland
- Department of Radiology, University Hospital Tuebingen, Tuebingen, Germany
| | - Martin W Huellner
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland
| | - Philipp A Kaufmann
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland
| | - Irene A Burger
- Department of Nuclear Medicine, Cantonal Hospital Baden, Baden, Switzerland
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland
| | - Alexander Maurer
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, CH-8091, Switzerland.
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Matthias M, Sauter A, Winkel D, Wasserthal J, Henkel M, Elyan A, Boll D, Merkle E, Seifert H, Wetterauer C. PROSTAITE one – AI-based prostate volumetry and zonal development. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01020-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Segeroth M, Winkel DJ, Strebel I, Yang S, van der Stouwe JG, Formambuh J, Badertscher P, Cyriac J, Wasserthal J, Caobelli F, Madaffari A, Lopez-Ayala P, Zellweger M, Sauter A, Mueller C, Bremerich J, Haaf P. Pulmonary transit time of cardiovascular magnetic resonance perfusion scans for quantification of cardiopulmonary haemodynamics. Eur Heart J Cardiovasc Imaging 2023:6994365. [PMID: 36662127 PMCID: PMC10364617 DOI: 10.1093/ehjci/jead001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/26/2022] [Indexed: 01/21/2023] Open
Abstract
AIMS Pulmonary transit time (PTT) is the time blood takes to pass from the right ventricle to the left ventricle via pulmonary circulation. We aimed to quantify PTT in routine cardiovascular magnetic resonance imaging perfusion sequences. PTT may help in the diagnostic assessment and characterization of patients with unclear dyspnoea or heart failure (HF). METHODS AND RESULTS We evaluated routine stress perfusion cardiovascular magnetic resonance scans in 352 patients, including an assessment of PTT. Eighty-six of these patients also had simultaneous quantification of N-terminal pro-brain natriuretic peptide (NTproBNP). NT-proBNP is an established blood biomarker for quantifying ventricular filling pressure in patients with presumed HF. Manually assessed PTT demonstrated low inter-rater variability with a correlation between raters >0.98. PTT was obtained automatically and correctly in 266 patients using artificial intelligence. The median PTT of 182 patients with both left and right ventricular ejection fraction >50% amounted to 6.8 s (Pulmonary transit time: 5.9-7.9 s). PTT was significantly higher in patients with reduced left ventricular ejection fraction (<40%; P < 0.001) and right ventricular ejection fraction (<40%; P < 0.0001). The area under the receiver operating characteristics curve (AUC) of PTT for exclusion of HF (NT-proBNP <125 ng/L) was 0.73 (P < 0.001) with a specificity of 77% and sensitivity of 70%. The AUC of PTT for the inclusion of HF (NT-proBNP >600 ng/L) was 0.70 (P < 0.001) with a specificity of 78% and sensitivity of 61%. CONCLUSION PTT as an easily, even automatically obtainable and robust non-invasive biomarker of haemodynamics might help in the evaluation of patients with dyspnoea and HF.
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Affiliation(s)
- Martin Segeroth
- Department of Radiology and Nuclear Medicine, University Hospital, Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - David Jean Winkel
- Department of Radiology and Nuclear Medicine, University Hospital, Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Ivo Strebel
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Shan Yang
- Department of Research and Analysis, University Hospital Basel, University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Jan Gerrit van der Stouwe
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Jude Formambuh
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Patrick Badertscher
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Joshy Cyriac
- Department of Research and Analysis, University Hospital Basel, University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Jakob Wasserthal
- Department of Research and Analysis, University Hospital Basel, University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Federico Caobelli
- Department of Radiology and Nuclear Medicine, University Hospital, Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Antonio Madaffari
- Department of Cardiology, University Hospital Bern, Freiburgstrasse 18, 3010 Bern, Switzerland
| | - Pedro Lopez-Ayala
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Michael Zellweger
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Alexander Sauter
- Department of Radiology and Nuclear Medicine, University Hospital, Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Christian Mueller
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Jens Bremerich
- Department of Radiology and Nuclear Medicine, University Hospital, Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Philip Haaf
- Department of Cardiology, Cardiovascular Research Institute Basel, University Hospital Basel and University of Basel, Petersgraben 4, 4031 Basel, Switzerland
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Picavet VA, Dellian M, Gehrking E, Sauter A, Hasselbacher K. Correction: Treatment of snoring using a non-invasive Er:YAG laser with SMOOTH mode (NightLase): a randomized controlled trial. Eur Arch Otorhinolaryngol 2023; 280:313. [PMID: 36036836 PMCID: PMC9813194 DOI: 10.1007/s00405-022-07624-z] [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] [Indexed: 01/09/2023]
Affiliation(s)
- Valerie A. Picavet
- ENT, Praxis für Ästhetik/HNO, Ludwigstrasse 7, Augsburg, Bavaria Germany ,ENT, MVZ Moser Gehrking Sauter und Partner, Augsburg, Bavaria Germany ,ENT Praxis Hasselbacher-Picavet & Partner, Donauwörth, Bavaria Germany
| | - Marc Dellian
- ENT, MVZ Moser Gehrking Sauter und Partner, Augsburg, Bavaria Germany
| | - Eckard Gehrking
- ENT, MVZ Moser Gehrking Sauter und Partner, Augsburg, Bavaria Germany
| | - Alexander Sauter
- ENT, MVZ Moser Gehrking Sauter und Partner, Augsburg, Bavaria Germany
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Bühler M, Fahrländer J, Sauter A, Becker M, Wistorf E, Steinfath M, Stolz A. GPER1 links estrogens to centrosome amplification and chromosomal instability in human colon cells. Life Sci Alliance 2022; 6:6/1/e202201499. [PMID: 36384894 PMCID: PMC9670797 DOI: 10.26508/lsa.202201499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 10/24/2022] [Accepted: 10/25/2022] [Indexed: 11/17/2022] Open
Abstract
The role of the alternate G protein-coupled estrogen receptor 1 (GPER1) in colorectal cancer (CRC) development and progression is unclear, not least because of conflicting clinical and experimental evidence for pro- and anti-tumorigenic activities. Here, we show that low concentrations of the estrogenic GPER1 ligands, 17β-estradiol, bisphenol A, and diethylstilbestrol cause the generation of lagging chromosomes in normal colon and CRC cell lines, which manifest in whole chromosomal instability and aneuploidy. Mechanistically, (xeno)estrogens triggered centrosome amplification by inducing centriole overduplication that leads to transient multipolar mitotic spindles, chromosome alignment defects, and mitotic laggards. Remarkably, we could demonstrate a significant role of estrogen-activated GPER1 in centrosome amplification and increased karyotype variability. Indeed, both gene-specific knockdown and inhibition of GPER1 effectively restored normal centrosome numbers and karyotype stability in cells exposed to 17β-estradiol, bisphenol A, or diethylstilbestrol. Thus, our results reveal a novel link between estrogen-activated GPER1 and the induction of key CRC-prone lesions, supporting a pivotal role of the alternate estrogen receptor in colon neoplastic transformation and tumor progression.
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Affiliation(s)
| | | | | | | | | | | | - Ailine Stolz
- Department of Experimental Toxicology and ZEBET, German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), Berlin, Germany
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6
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Boyer L, Sauter A, Sommer R, Till M, Gelius P, Herrmann-Johns A. Pandemiebedingte Transformationsprozesse partizipativer
Forschungsprojekte – Eine qualitative Studie zu vier
Bewegungsförderungsprojekten aus dem Capital4Health
Forschungsverbund. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753675] [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] [Indexed: 12/12/2022]
Affiliation(s)
- L Boyer
- Universität Regensburg, Medizinische Soziologie, Regensburg,
Deutschland
| | - A Sauter
- Universität Regensburg, Medizinische Soziologie, Regensburg,
Deutschland
| | - R Sommer
- Friedrich-Alexander-Universität Erlangen-Nürnberg,
Department für Sportwissenschaften und Sport, Erlangen,
Deutschland
| | - M Till
- Friedrich-Alexander-Universität Erlangen-Nürnberg,
Department für Sportwissenschaften und Sport, Erlangen,
Deutschland
| | - P Gelius
- Friedrich-Alexander-Universität Erlangen-Nürnberg,
Department für Sportwissenschaften und Sport, Erlangen,
Deutschland
| | - A Herrmann-Johns
- Universität Regensburg, Medizinische Soziologie, Regensburg,
Deutschland
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Sauter A, Abu-Omar K, Linder S, Sommer R, Herrmann-Johns A. Resiliente Communities? Eine qualitative Interviewstudie zur
Aufrechterhaltung eines Bewegungsprojektes für Frauen in schwierigen
Lebenslagen (BIG-Projekt) während den ersten beiden Jahren der COVID-19
Pandemie. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753816] [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] [Indexed: 12/12/2022]
Affiliation(s)
- A Sauter
- Universität Regensburg, Professur für Medizinische
Soziologie, Regensburg, Deutschland
| | - K Abu-Omar
- Friedrich-Alexander-Universität Erlangen-Nürnberg,
Department Sportwissenschaft und Sport, Erlangen, Deutschland
| | - S Linder
- Friedrich-Alexander-Universität Erlangen-Nürnberg,
Department Sportwissenschaft und Sport, Erlangen, Deutschland
| | - R Sommer
- Friedrich-Alexander-Universität Erlangen-Nürnberg,
Department Sportwissenschaft und Sport, Erlangen, Deutschland
| | - A Herrmann-Johns
- Universität Regensburg, Professur für Medizinische
Soziologie, Regensburg, Deutschland
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8
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Wilder-Smith AJ, Yang S, Weikert T, Bremerich J, Haaf P, Segeroth M, Ebert LC, Sauter A, Sexauer R. Automated Detection, Segmentation, and Classification of Pericardial Effusions on Chest CT Using a Deep Convolutional Neural Network. Diagnostics (Basel) 2022; 12:diagnostics12051045. [PMID: 35626201 PMCID: PMC9139725 DOI: 10.3390/diagnostics12051045] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/09/2022] [Accepted: 04/19/2022] [Indexed: 01/15/2023] Open
Abstract
Pericardial effusions (PEFs) are often missed on Computed Tomography (CT), which particularly affects the outcome of patients presenting with hemodynamic compromise. An automatic PEF detection, segmentation, and classification tool would expedite and improve CT based PEF diagnosis; 258 CTs with (206 with simple PEF, 52 with hemopericardium) and without PEF (each 134 with contrast, 124 non-enhanced) were identified using the radiology report (01/2016−01/2021). PEF were manually 3D-segmented. A deep convolutional neural network (nnU-Net) was trained on 316 cases and separately tested on the remaining 200 and 22 external post-mortem CTs. Inter-reader variability was tested on 40 CTs. PEF classification utilized the median Hounsfield unit from each prediction. The sensitivity and specificity for PEF detection was 97% (95% CI 91.48−99.38%) and 100.00% (95% CI 96.38−100.00%) and 89.74% and 83.61% for diagnosing hemopericardium (AUC 0.944, 95% CI 0.904−0.984). Model performance (Dice coefficient: 0.75 ± 0.01) was non-inferior to inter-reader (0.69 ± 0.02) and was unaffected by contrast administration nor alternative chest pathology (p > 0.05). External dataset testing yielded similar results. Our model reliably detects, segments, and classifies PEF on CT in a complex dataset, potentially serving as an alert tool whilst enhancing report quality. The model and corresponding datasets are publicly available.
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Affiliation(s)
- Adrian Jonathan Wilder-Smith
- Division of Research and Analytical Services, University Hospital Basel, 4031 Basel, Switzerland; (A.J.W.-S.); (S.Y.); (T.W.); (M.S.); (A.S.)
- Department of Radiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
| | - Shan Yang
- Division of Research and Analytical Services, University Hospital Basel, 4031 Basel, Switzerland; (A.J.W.-S.); (S.Y.); (T.W.); (M.S.); (A.S.)
| | - Thomas Weikert
- Division of Research and Analytical Services, University Hospital Basel, 4031 Basel, Switzerland; (A.J.W.-S.); (S.Y.); (T.W.); (M.S.); (A.S.)
- Department of Radiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
| | - Jens Bremerich
- Department of Radiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
| | - Philip Haaf
- Department of Cardiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
| | - Martin Segeroth
- Division of Research and Analytical Services, University Hospital Basel, 4031 Basel, Switzerland; (A.J.W.-S.); (S.Y.); (T.W.); (M.S.); (A.S.)
| | - Lars C. Ebert
- 3D Center Zurich, Institute of Forensic Medicine, University of Zürich, 8057 Zürich, Switzerland;
| | - Alexander Sauter
- Division of Research and Analytical Services, University Hospital Basel, 4031 Basel, Switzerland; (A.J.W.-S.); (S.Y.); (T.W.); (M.S.); (A.S.)
- Department of Radiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
| | - Raphael Sexauer
- Division of Research and Analytical Services, University Hospital Basel, 4031 Basel, Switzerland; (A.J.W.-S.); (S.Y.); (T.W.); (M.S.); (A.S.)
- Department of Radiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
- Correspondence: ; Tel.: +41-613-286-584
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Seyam M, Weikert T, Sauter A, Brehm A, Psychogios MN, Blackham KA. Utilization of Artificial Intelligence-based Intracranial Hemorrhage Detection on Emergent Noncontrast CT Images in Clinical Workflow. Radiol Artif Intell 2022; 4:e210168. [PMID: 35391777 DOI: 10.1148/ryai.210168] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 01/10/2022] [Accepted: 01/20/2022] [Indexed: 01/23/2023]
Abstract
Authors implemented an artificial intelligence (AI)-based detection tool for intracranial hemorrhage (ICH) on noncontrast CT images into an emergent workflow, evaluated its diagnostic performance, and assessed clinical workflow metrics compared with pre-AI implementation. The finalized radiology report constituted the ground truth for the analysis, and CT examinations (n = 4450) before and after implementation were retrieved using various keywords for ICH. Diagnostic performance was assessed, and mean values with their respective 95% CIs were reported to compare workflow metrics (report turnaround time, communication time of a finding, consultation time of another specialty, and turnaround time in the emergency department). Although practicable diagnostic performance was observed for overall ICH detection with 93.0% diagnostic accuracy, 87.2% sensitivity, and 97.8% negative predictive value, the tool yielded lower detection rates for specific subtypes of ICH (eg, 69.2% [74 of 107] for subdural hemorrhage and 77.4% [24 of 31] for acute subarachnoid hemorrhage). Common false-positive findings included postoperative and postischemic defects (23.6%, 37 of 157), artifacts (19.7%, 31 of 157), and tumors (15.3%, 24 of 157). Although workflow metrics such as communicating a critical finding (70 minutes [95% CI: 54, 85] vs 63 minutes [95% CI: 55, 71]) were on average reduced after implementation, future efforts are necessary to streamline the workflow all along the workflow chain. It is crucial to define a clear framework and recognize limitations as AI tools are only as reliable as the environment in which they are deployed. Keywords: CT, CNS, Stroke, Diagnosis, Classification, Application Domain © RSNA, 2022.
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Affiliation(s)
- Muhannad Seyam
- Department of Diagnostic and Interventional Neuroradiology, Clinic of Radiology and Nuclear Medicine (M.S., A.B., M.N.P., K.A.B.), and Department of Radiology and Nuclear Medicine (T.W., A.S.), University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland; and Department of Neurologic Sciences, University of Vermont Medical Center, Burlington, Vt (M.S.)
| | - Thomas Weikert
- Department of Diagnostic and Interventional Neuroradiology, Clinic of Radiology and Nuclear Medicine (M.S., A.B., M.N.P., K.A.B.), and Department of Radiology and Nuclear Medicine (T.W., A.S.), University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland; and Department of Neurologic Sciences, University of Vermont Medical Center, Burlington, Vt (M.S.)
| | - Alexander Sauter
- Department of Diagnostic and Interventional Neuroradiology, Clinic of Radiology and Nuclear Medicine (M.S., A.B., M.N.P., K.A.B.), and Department of Radiology and Nuclear Medicine (T.W., A.S.), University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland; and Department of Neurologic Sciences, University of Vermont Medical Center, Burlington, Vt (M.S.)
| | - Alex Brehm
- Department of Diagnostic and Interventional Neuroradiology, Clinic of Radiology and Nuclear Medicine (M.S., A.B., M.N.P., K.A.B.), and Department of Radiology and Nuclear Medicine (T.W., A.S.), University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland; and Department of Neurologic Sciences, University of Vermont Medical Center, Burlington, Vt (M.S.)
| | - Marios-Nikos Psychogios
- Department of Diagnostic and Interventional Neuroradiology, Clinic of Radiology and Nuclear Medicine (M.S., A.B., M.N.P., K.A.B.), and Department of Radiology and Nuclear Medicine (T.W., A.S.), University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland; and Department of Neurologic Sciences, University of Vermont Medical Center, Burlington, Vt (M.S.)
| | - Kristine A Blackham
- Department of Diagnostic and Interventional Neuroradiology, Clinic of Radiology and Nuclear Medicine (M.S., A.B., M.N.P., K.A.B.), and Department of Radiology and Nuclear Medicine (T.W., A.S.), University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland; and Department of Neurologic Sciences, University of Vermont Medical Center, Burlington, Vt (M.S.)
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Schmidt H, Gutjahr L, Sauter A, Zech F, Nchioua R, Stenger S, Frick M, Kirchhoff F, Dietl P, Wittekindt OH. Serially passaged, conditionally reprogrammed nasal epithelial cells as a model to study epithelial functions and SARS-CoV-2 infection. Am J Physiol Cell Physiol 2022; 322:C591-C604. [PMID: 35196166 PMCID: PMC8977148 DOI: 10.1152/ajpcell.00363.2021] [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] [Indexed: 11/22/2022]
Abstract
Primary airway epithelial cells (pAECs) cultivated at air-liquid interface (ALI) conditions are widely used as surrogates for human in vivo epithelia. To extend the proliferative capacity and to enable serially passaging of pAECs, conditional reprogramming (cr) has been employed in recent years. However, ALI epithelia derived from cr cells often display functional changes with increasing passages. This highlights the need for thorough validation of the ALI cultures for the respective application. In our study, we evaluated the use of serially passaged cr nasal epithelial cells (crNECs) as a model to study SARS-CoV-2 infection and effects on ion and water transport. NECs were obtained from healthy individuals and cultivated as ALI epithelia derived from passages 1, 2, 3, and 5. We compared epithelial differentiation, ion and water transport, and infection with SARS-CoV-2 between passages. Our results show that epithelia maintained major differentiation characteristics and physiological ion and water transport properties through all passages. However, the frequency of ciliated cells, short circuit currents reflecting epithelial Na+ channel (ENaC) and cystic fibrosis transmembrane conductance regulator (CFTR) activity and expression of aquaporin 3 and 5 decreased gradually over passages. crNECs also expressed SARS-CoV-2 receptors angiotensin converting enzyme 2 (ACE2) and transmembrane serin2 protease 2 (TMPRSS2) across all passages and allowed SARS-CoV-2 replication in all passages. In summary, we provide evidence that passaged crNECs provide an appropriate model to study SARS-CoV-2 infection and also epithelial transport function when considering some limitations that we defined herein.
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Affiliation(s)
- Hanna Schmidt
- Department of Pediatric and Adolescent Medicine, Ulm University Medical Cente, Ulm, Germany.,Institute of General Physiology, Ulm University, Ulm, Germany
| | - Lara Gutjahr
- Institute of General Physiology, Ulm University, Ulm, Germany
| | | | - Fabian Zech
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Rayhane Nchioua
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Steffen Stenger
- Institute of Medical Microbiology and Hygiene, Ulm University Medical Center, Ulm, Germany
| | - Manfred Frick
- Institute of General Physiology, Ulm University, Ulm, Germany
| | - Frank Kirchhoff
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Paul Dietl
- Institute of General Physiology, Ulm University, Ulm, Germany
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Schmid S, Schiller K, Seitz A, Koll F, Beckert F, Korn P, Lewerich J, Maisch P, Sauter A, Rödel C, Flentje M, Riedel T, Combs S, Zengerling F, Bolenz C, Kübler H, Gschwend J, Retz M. RACE IT - A prospective, single arm, multicenter, phase II-trial to assess safety and efficacy of preoperative RAdiation therapy before radical CystEctomy combined with ImmunoTherapy in locally advanced urothelial carcinoma of the bladder (AB 65/18). Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00417-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Herms E, Slotta-Huspenin J, Gärtner A, Preuss S, Hauner K, Heck M, Autenrieth M, Maurer T, Kübler H, Holzapfel K, Sauter A, Schwarz-Boeger U, Wagenpfeil S, Heemann U, Stock K. Ultrasound based CEUS-Bosniak classification for cystic renal lesions: An 8-year clinical experience. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00141-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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13
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Boyer L, Sauter A, Loss J. Messung von Handlungsmöglichkeiten (capabilities) zur Führung eines aktiven Lebensstil - Entwicklung und Erprobung eines Messinstruments für Senior/innen. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1732268] [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] [Indexed: 10/20/2022]
Affiliation(s)
- L Boyer
- Medizinische Soziologie am Institut für Epidemiologie und Präventivmedizin, Universität Regensburg
| | - A Sauter
- Medizinische Soziologie am Institut für Epidemiologie und Präventivmedizin, Universität Regensburg
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14
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Sauter A, Kikhia S, von Sommoggy J, Loss J. Was beeinflusst Bewegung im Alltag syrischer MigrantInnen in Deutschland– Ergebnisse einer qualitativen Befragung. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1732186] [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] [Indexed: 10/20/2022]
Affiliation(s)
- A Sauter
- Medizinische Soziologie, Universität Regensburg
| | - S Kikhia
- Medizinische Soziologie, Universität Regensburg
| | | | - J Loss
- Medizinische Soziologie, Universität Regensburg
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Sauter A, Wittekindt O, Dietl P, Schmidt. H. WS07.6 Aquaporin 3 modulates transepithelial fluid resorption upon exposure of airway epithelia to hyperosmotic solutions. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)00956-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Derfuss T, Weber M, Hughes R, Eggebrecht J, Wang Q, Sauter A, Koendgen H, Hauser S, Bar-Or A, Hartung H. P36 Serum immunoglobulin levels and risk of serious infections in the pivotal phase III trials of ocrelizumab in multiple sclerosis and their open-label extensions. Clin Neurophysiol 2020. [DOI: 10.1016/j.clinph.2019.12.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Ostermann M, Sauter A, Xue Y, Birkeland E, Schoelermann J, Holst B, Cimpan MR. Label-free impedance flow cytometry for nanotoxicity screening. Sci Rep 2020; 10:142. [PMID: 31924828 PMCID: PMC6954202 DOI: 10.1038/s41598-019-56705-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 12/11/2019] [Indexed: 11/12/2022] Open
Abstract
The development of reliable and cost-efficient methods to assess the toxicity of nanomaterials (NMs) is critical for the proper identification of their impact on human health and for ensuring a safe progress of nanotechnology. In this study, we investigated the reliability and applicability of label-free impedance flow cytometry (IFC) for in vitro nanotoxicity screening, which avoids time-consuming labelling steps and minimizes possible NM-induced interferences. U937 human lymphoma cells were exposed for 24 h to eight different nanomaterials at five concentrations (2, 10, 20, 50, and 100 μg/mL). The NMs' effect on viability was measured using IFC and the results were compared to those obtained by trypan blue (TB) dye exclusion and conventional flow cytometry (FC). To discriminate viable from necrotic cells, the IFC measurement settings regarding signal trigger level and frequency, as well as the buffer composition, were optimised. A clear discrimination between viable and necrotic cells was obtained at 6 MHz in a sucrose-based measurement buffer. Nanomaterial-induced interferences were not detected for IFC. The IFC and TB assay results were in accordance for all NMs. The IFC was found to be robust, reliable and less prone to interferences due to the advantage of being label-free.
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Affiliation(s)
- Melanie Ostermann
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Alexander Sauter
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
- Royal Norwegian Naval Academy, Bergen, Norway
| | - Ying Xue
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Eivind Birkeland
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
- Institute for Biochemistry, ETH, Zürich, Switzerland
| | - Julia Schoelermann
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
- BerGenBio ASA, Bergen, Norway
| | - Bodil Holst
- Department of Physics and Technology, University of Bergen, Bergen, Norway
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18
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Sauter A, Yi DH, Li Y, Roersma S, Appel S. The Culture Dish Surface Influences the Phenotype and Cytokine Production of Human Monocyte-Derived Dendritic Cells. Front Immunol 2019; 10:2352. [PMID: 31632415 PMCID: PMC6783514 DOI: 10.3389/fimmu.2019.02352] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/18/2019] [Indexed: 12/12/2022] Open
Abstract
Monocyte-derived dendritic cells (moDC) are an important scientific and clinical source of functional dendritic cells (DC). However, the optimization of the generation process has to date mainly been limited to the variation of soluble factors. In this study, we investigated the impact of the cell culture dish surface on phenotype and cytokine profile. We compared a standard cell culture dish to a non-adherent culture dish for two immunogenic maturation conditions, two tolerogenic conditions, and an unstimulated control. Phenotype, cytokine profile and T cell stimulatory capacity were determined after a 3-day culture. Light microscopy revealed an increase in homotypic cluster formation correlated with the use of non-adherent surfaces, which could be reduced by using blocking antibodies against CD18. All surface markers analyzed showed moderate to strong differences depending on the culture dish surface, including significantly decreased expression of key maturation markers such as CD80, CD86, and CCR7 as well as PD-L1 on cells stimulated with the Jonuleit cytokine cocktail cultured on a non-adherent surface. Significant differences in the secretion of many cytokines were observed, especially for cells stimulated with LPS, with over 10-fold decreased secretion of IL-10, IL12-p40, and TNF-α from the cells cultured on the non-adherent surface. All immunogenic moDC populations showed similar capacity to induce antigen-specific T cells. These results provide evidence that the DC phenotype depends on the surface used during moDC generation. This has important implications for the optimization of DC-based immunotherapy development and underlines that the local surrounding can interfere with the final DC population beyond the soluble factors.
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Affiliation(s)
| | - Dag Heiro Yi
- Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Yayan Li
- Department of Biomedicine, University of Bergen, Bergen, Norway.,Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Sabine Roersma
- Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Silke Appel
- Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
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Horger M, Fallier-Becker P, Thaiss WM, Sauter A, Bösmüller H, Martella M, Preibsch H, Fritz J, Nikolaou K, Kloth C. Is There a Direct Correlation Between Microvascular Wall Structure and k-Trans Values Obtained From Perfusion CT Measurements in Lymphomas? Acad Radiol 2019; 26:247-256. [PMID: 29731419 DOI: 10.1016/j.acra.2018.04.010] [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: 01/24/2018] [Revised: 04/14/2018] [Accepted: 04/15/2018] [Indexed: 11/27/2022]
Abstract
RATIONALE AND OBJECTIVES This study aimed to test the hypothesis that ultrastructural wall abnormalities of lymphoma vessels correlate with perfusion computed tomography (PCT) kinetics. MATERIALS AND METHODS Our local institutional review board approved this prospective study. Between February 2013 and June 2016, we included 23 consecutive subjects with newly diagnosed lymphoma, who were referred for computed tomography-guided biopsy (6 women, 17 men; mean age, 60.61 ± 12.43 years; range, 28-74 years) and additionally agreed to undergo PCT of the target lymphoma tissues. PCT was obtained for 40 seconds using 80 kV, 120 mAs, 64 × 0.6-mm collimation, 6.9-cm z-axis coverage, and 26 volume measurements. Mean and maximum k-trans (mL/100 mL/min), blood flow (BF; mL/100 mL/min) and blood volume (BV) were quantified using the deconvolution and the maximum slope + Patlak calculation models. Immunohistochemical staining was performed for microvessel density quantification (vessels/m2), and electron microscopy was used to determine the presence or absence of tight junctions, endothelial fenestration, basement membrane, and pericytes, and to measure extracellular matrix thickness. RESULTS Extracellular matrix thickness as well as the presence or absence of tight junctions, basal lamina, and pericytes did not correlate with computed tomography perfusion parameters. Endothelial fenestrations correlated significantly with mean BFdeconvolution (P = .047, r = 0.418) and additionally was significantly associated with higher mean BVdeconvolution (P < .005). Mean k-transPatlak correlated strongly with mean k-transdeconvolution (r = 0.939, P = .001), and both correlated with mean BFdeconvolution (P = .001, r = 0.748), max BFdeconvolution (P = .028, r = 0.564), mean BVdeconvolution (P = .001, r = 0.752), and max BVdeconvolution (P = .001, r = 0.771). Microvessel density correlated with max k-transdeconvolution (r = 0.564, P = .023). Vascular endothelial growth factor receptor-3 expression (receptor specific for lymphatics) correlated significantly with max k-transPatlak (P = .041, r = 0.686) and mean BFdeconvolution (P = .038, r = 0.695). CONCLUSION k-Trans values of PCT do not correlate with ultrastructural microvessel features, whereas endothelial fenestrations correlate with increased intra-tumoral BVs.
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Affiliation(s)
- Marius Horger
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | | | - Wolfgang M Thaiss
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - Alexander Sauter
- Clinic of Radiology and Nuclear Medicine, University Hospital Basel, Basel, Switzerland
| | - Hans Bösmüller
- Institute of Pathology, University Hospital Tuebingen, Tübingen, Germany
| | - Manuela Martella
- Institute of Pathology, University Hospital Tuebingen, Tübingen, Germany
| | - Heike Preibsch
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - Jan Fritz
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - Christopher Kloth
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany.
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20
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Sauter A, Loss J. Bewegungsbezogene Capabilities zur Führung eines aktiven Lebensstils bei Studierenden und Auszubildenden – Ergebnisse einer qualitativen Befragung. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1667719] [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] [Indexed: 10/28/2022]
Affiliation(s)
- A Sauter
- Institut für Epidemiologie und Präventivmedizin/Universität Regensburg, Medizinische Soziologie, Regensburg, Deutschland
| | - J Loss
- Institut für Epidemiologie und Präventivmedizin/Universität Regensburg, Medizinische Soziologie, Regensburg, Deutschland
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21
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Metz B, Sauter A, Strobl H, Tittlbach S, Loss J. Multiplikatoren in Gemeindearbeitskreisen – Motive verschiedener Akteure in der partizipativen Planung und Umsetzung von Bewegungsangeboten. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1667707] [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] [Indexed: 10/28/2022]
Affiliation(s)
- B Metz
- Universität, Medizinische Soziologie, Regensburg, Deutschland
| | - A Sauter
- Universität, Medizinische Soziologie, Regensburg, Deutschland
| | - H Strobl
- Universität, Institut für Sportwissenschaft, Bayreuth, Deutschland
| | - S Tittlbach
- Universität, Institut für Sportwissenschaft, Bayreuth, Deutschland
| | - J Loss
- Universität, Medizinische Soziologie, Regensburg, Deutschland
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22
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Ibrahim M, Xue Y, Ostermann M, Sauter A, Steinmueller-Nethl D, Schweeberg S, Krueger A, Cimpan MR, Mustafa K. In vitro cytotoxicity assessment of nanodiamond particles and their osteogenic potential. J Biomed Mater Res A 2018; 106:1697-1707. [PMID: 29451353 DOI: 10.1002/jbm.a.36369] [Citation(s) in RCA: 14] [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: 12/11/2017] [Revised: 01/18/2018] [Accepted: 02/01/2018] [Indexed: 12/28/2022]
Abstract
Scaffolds functionalized with nanodiamond particles (nDP) hold great promise with regard to bone tissue formation in animal models. Degradation of the scaffolds over time may leave nDP within the tissues, raising concerns about possible long-term unwanted effects. Human SaOS-2 osteoblast-like cells and U937 monoblastoid cells were exposed to five different concentrations (0.002-2 mg/L) of nDP (size range: 2.36-4.42 nm) for 24 h. Cell viability was assessed by impedance-based methods. The differential expression of stress and toxicity-related genes was evaluated by polymerase chain reaction (PCR) super-array, while the expression of selected inflammatory and cell death markers was determined by reverse transcriptase quantitative polymerase chain reaction (RT-qPCR). Furthermore, the expression of osteogenic genes by SaOS-2 cells, alkaline phosphatase activity and the extracellular calcium nodule deposition in response to nDP were determined in vitro. Cells responded differently to higher nDP concentrations (≥0.02 mg/L), that is, no loss of viability for SaOS-2 cells and significantly reduced viability for U937 cells. Gene expression showed significant upregulation of several cell death and inflammatory markers, among other toxicity reporter genes, indicating inflammatory and cytotoxic responses in U937 cells. Nanodiamond particles improved the osteogenicity of osteoblast-like cells with no evident cytotoxicity. However, concentration-dependent cytotoxic and inflammatory responses were seen in the U937 cells, negatively affecting osteogenicity in co-cultures. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1697-1707, 2018.
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Affiliation(s)
- Mohamed Ibrahim
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway.,Centre for International Health, Department of Global Public Health and Primary Care, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Ying Xue
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Melanie Ostermann
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Alexander Sauter
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | | | - Sarah Schweeberg
- Institute for Organic Chemistry, Julius-Maximilians University of Würzburg, Würzburg, Germany
| | - Anke Krueger
- Institute for Organic Chemistry, Julius-Maximilians University of Würzburg, Würzburg, Germany
| | - Mihaela R Cimpan
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
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23
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Sauter A, Rüter J, Lindacher V, Loss J. Können in kooperativen Planungsgruppen Kapazitäten zur Bewegungsförderung aufgebaut werden? – Ergebnisse aus einem Forschungsverbund. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605708] [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] [Indexed: 10/18/2022]
Affiliation(s)
- A Sauter
- Universität Regensburg, Medizinische Soziologie, Regensburg
| | - J Rüter
- Universität Regensburg, Medizinische Soziologie, Regensburg
| | - V Lindacher
- Universität Regensburg, Medizinische Soziologie, Regensburg
| | - J Loss
- Universität Regensburg, Medizinische Soziologie, Regensburg
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24
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Sauter A, Rüter J, Lindacher V, Loss J. Bewegungsbezogene Capabilities zur Führung eines aktiven Lebensstils im Alter – Ergebnisse einer qualitativen Befragung. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605899] [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] [Indexed: 10/18/2022]
Affiliation(s)
- A Sauter
- Universität Regensburg, Medizinische Soziologie, Regensburg
| | - J Rüter
- Universität Regensburg, Medizinische Soziologie, Regensburg
| | - V Lindacher
- Universität Regensburg, Medizinische Soziologie, Regensburg
| | - J Loss
- Universität Regensburg, Medizinische Soziologie, Regensburg
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Abstract
Objective Abnormal wound healing processes can result in hypertrophic scars and keloids. TGF-β1 and HGF/SF are biphasic growth factor cytokines in physiological and pathophysiological conditions. TGF-β1 has been found to be pivotal in the formation of keloid tissue and therefore neutralising antibodies may allow wound healing without keloid formation. TGF-β1 has been reported to be antagonised by HGF/SF. Some authors have reported that exogenous administration of HGF/SF prevented scar formation. Hence in this study, we targeted TGF-β1 and determined the levels of HGF/SF in fibroblast cell culture. Methods Keloid tissue was taken from 7 patients while another 7 patients with mature non-hypertrophic scar served as controls. All tissues were cultured and fibroblast cultures were used for further experiments. TGF-β1 antisense was administered at 3 and 6 μmol/ml and HGF/SF levels were determined after 16, 24 and 48 hours of incubation. Results The levels of HGF/SF showed significant differences after incubation with antisense oligonucleotides. The increasing antisense levels resulted in increased HGF/SF levels (up to 87.66pg/ml after 48 hours of incubation). Conclusions In conclusion, targeting TGF-β1 resulted in significantly increased levels of HGF/SF. The clinical relevance could include the use of locally administered HGF/SF in protein or gene form to minimise keloid formation. Nevertheless, wound healing is the result of many interacting cytokines and therefore neutralising or targeting one protein could result in no significant effect.
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26
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Kramer B, Schultz JD, Hock C, Sauter A, Stuck BA, Hörmann K, Birk R, Aderhold C. Effect of selective small molecule inhibitors on MMP-9 and VEGFR-1 expression in p16-positive and -negative squamous cell carcinoma. Oncol Lett 2017; 13:3269-3276. [PMID: 28521433 DOI: 10.3892/ol.2017.5844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/12/2017] [Indexed: 11/06/2022] Open
Abstract
The identification of molecular targets in the therapy of human papilloma virus (HPV)-associated head and neck squamous cell carcinoma (HNSCC) is a primary aim of cancer research. Matrix metalloproteinase 9 (MMP-9) and vascular endothelial growth factor receptor (VEGFR) have important roles in the development of HNSCC. The tyrosine kinase inhibitors, nilotinib, dasatinib, erlotinib and gefitinib are well established in the targeted therapy of tumors other than HNSCC. The present study aimed to investigate the alteration of MMP-9 and VEGFR-1 expression patterns following treatment with these tyrosine kinase inhibitors in p16-positive and -negative squamous carcinoma cells. MMP-9 and VEGFR-1 expression was evaluated using an ELISA in HNSCC 11A, HNSCC 14C and p16-positive CERV196 tumor cell lines, following treatment with nilotinib, dasatinib, erlotinib and gefitinib. A statistically significant reduction in MMP-9 and VEGFR-1 expression was observed in the p16-negative HNSCC 11A cells following treatment with all inhibitors (P<0.05). VEGFR-1 expression was significantly increased in p16-positive SCC cells following treatment with nilotinib, dasatinib, erlotinib and gefitinib (P<0.05). The expression of MMP-9 and VEGFR-1 was significantly altered by treatment with nilotinib, dasatinib, erlotinib and gefitinib in vitro. The results of the present study are attributed to the efficacy of the tested drugs and present potential compensatory strategies of cancer cells to avoid the antiangiogenic properties of the tested tyrosine kinase inhibitors in vitro.
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Affiliation(s)
- Benedikt Kramer
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Johannes David Schultz
- Department of Otorhinolaryngology Head and Neck Surgery, Facial Plastic Surgery, Karlsruhe Clinical Center, Karlsruhe, Germany
| | - Clemens Hock
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Alexander Sauter
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Boris A Stuck
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Karl Hörmann
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Richard Birk
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Christoph Aderhold
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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27
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Riederer I, Sauter A, Renz M, Dangelmaier J, Kirschke J, Fingerle A, Rummeny E, Noel P, Muenzel D. Dual-layer Spektral-CT versus MRT bei der Differenzierung zwischen Hämorrhagie und Kontrastmittelextravasation nach mechanischer Rekanalisation. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600404] [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] [Indexed: 10/19/2022]
Affiliation(s)
- I Riederer
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und Interventionelle Radiologie, München
| | - A Sauter
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - M Renz
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - J Dangelmaier
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - J Kirschke
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Neuroradiologie, München
| | - A Fingerle
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - E Rummeny
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - P Noel
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - D Muenzel
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
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28
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Dangelmaier J, Schwaiger B, Renz M, Sauter A, Riederer I, Münzel D, Braren R, Fingerle A, Rummeny E, Noël P. Dual-Layer Spectral Computed Tomografy: Reduction of metallic artefacts from posterior spinal fusions using virtual monoenergetic imaging. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600166] [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] [Indexed: 10/19/2022]
Affiliation(s)
- J Dangelmaier
- Klinikum rechts der Isar der Technischen Universität München, Institut für diagnostische und interventionelle Radiologie, München
| | - B Schwaiger
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - M Renz
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - A Sauter
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - I Riederer
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - D Münzel
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - R Braren
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie
| | - A Fingerle
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - E Rummeny
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - P Noël
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie
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Thaiss W, Haberland U, Kaufmann S, Kloth C, Preibsch H, Ketelsen D, Nikolaou K, Horger M, Sauter A. Therapieansprechen nach TACE im HCC: Vergleich der Iod-Konzentration mit Perfusions-CT und RECIST/mRECIST. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600425] [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] [Indexed: 10/19/2022]
Affiliation(s)
- W Thaiss
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - U Haberland
- Siemens Healthcare GmbH, Diagnostic Imaging, Computed Tomografy, Research & Development, Forchheim
| | - S Kaufmann
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - C Kloth
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - H Preibsch
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - D Ketelsen
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - K Nikolaou
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - M Horger
- Radiologische Universitätsklinik Tübingen, Diagnostische und Interventionelle Radiologie, Tübingen
| | - A Sauter
- Universitätsspital Basel, Klinik für Radiologie und Nuklearmedizin, Abteilung Nuklearmedizin, Basel
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30
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Baumann A, Jorge-Finnigan A, Jung-Kc K, Sauter A, Horvath I, Morozova-Roche LA, Martinez A. Tyrosine Hydroxylase Binding to Phospholipid Membranes Prompts Its Amyloid Aggregation and Compromises Bilayer Integrity. Sci Rep 2016; 6:39488. [PMID: 28004763 PMCID: PMC5177901 DOI: 10.1038/srep39488] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 06/10/2016] [Accepted: 11/21/2016] [Indexed: 12/14/2022] Open
Abstract
Tyrosine hydroxylase (TH), a rate-limiting enzyme in the synthesis of catecholamine neurotransmitters and hormones, binds to negatively charged phospholipid membranes. Binding to both large and giant unilamellar vesicles causes membrane permeabilization, as observed by efflux and influx of fluorescence dyes. Whereas the initial protein-membrane interaction involves the N-terminal tail that constitutes an extension of the regulatory ACT-domain, prolonged membrane binding induces misfolding and self-oligomerization of TH over time as shown by circular dichroism and Thioflavin T fluorescence. The gradual amyloid-like aggregation likely occurs through cross-β interactions involving aggregation-prone motives in the catalytic domains, consistent with the formation of chain and ring-like protofilaments observed by atomic force microscopy in monolayer-bound TH. PC12 cells treated with the neurotoxin 6-hydroxydopamine displayed increased TH levels in the mitochondrial fraction, while incubation of isolated mitochondria with TH led to a decrease in the mitochondrial membrane potential. Furthermore, cell-substrate impedance and viability assays showed that supplementing the culture media with TH compromises cell viability over time. Our results revealed that the disruptive effect of TH on cell membranes may be a cytotoxic and pathogenic factor if the regulation and intracellular stability of TH is compromised.
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Affiliation(s)
- Anne Baumann
- Department of Biomedicine, University of Bergen, 5009 Bergen, Norway.,Division of Psychiatry, Haukeland University Hospital, 5021 Bergen, Norway
| | - Ana Jorge-Finnigan
- Department of Biomedicine, University of Bergen, 5009 Bergen, Norway.,K.G. Jebsen Centre for Neuropsychiatric Disorders, University of Bergen, 5009 Bergen, Norway
| | - Kunwar Jung-Kc
- Department of Biomedicine, University of Bergen, 5009 Bergen, Norway
| | - Alexander Sauter
- Department of Biomedicine, University of Bergen, 5009 Bergen, Norway.,Department of Clinical Dentistry, University of Bergen, 5009 Bergen, Norway
| | - Istvan Horvath
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | | | - Aurora Martinez
- Department of Biomedicine, University of Bergen, 5009 Bergen, Norway.,K.G. Jebsen Centre for Neuropsychiatric Disorders, University of Bergen, 5009 Bergen, Norway
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31
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Hoopmann M, Kagan KO, Sauter A, Abele H, Wagner P. Comparison of Errors of 35 Weight Estimation Formulae in a Standard Collective. Geburtshilfe Frauenheilkd 2016; 76:1172-1179. [PMID: 27904167 DOI: 10.1055/s-0042-118598] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Issue: The estimation of foetal weight is an integral part of prenatal care and obstetric routine. In spite of its known susceptibility to errors in cases of underweight or overweight babies, important obstetric decisions depend on it. In the present contribution we have examined the accuracy and error distribution of 35 weight estimation formulae within the normal weight range of 2500-4000 g. The aim of the study was to identify the weight estimation formulae with the best possible correspondence to the requirements of clinical routine. Materials and Methods: 35 clinically established weight estimation formulae were analysed in 3416 foetuses with weights between 2500 and 4000 g. For this we determined and compared the mean percentage error (MPE), the mean absolute percentage error (MAPE), and the proportions of estimates within the error ranges of 5, 10, 20 and 30 %. In addition, separate regression lines were calculated for the relationship between estimated and actual birth weights for the weight range 2500-4000 g. The formulae were thus examined for possible inhomogeneities. Results: The lowest MPE were achieved with the Hadlock III and V formulae (0.8 %, STW 9.2 % or, respectively, -0.8 %, STW 10.0 %). The lowest absolute error (6.6 %) as well as the most favourable frequency distribution in cases below 5 % and 10 % error (43.9 and 77.5) were seen for the Halaska formula. In graphic representations of the regression lines, 16 formulae revealed a weight overestimation in the lower weight range and an underestimation in the upper range. 14 formulae gave underestimations and merely 5 gave overestimations over the entire tested weight range. Conclusion: The majority of the tested formulae gave underestimations of the actual birth weight over the entire weight range or at least in the upper weight range. This result supports the current strategy of a two-stage weight estimation in which a formula is first chosen after a pre-estimation of the weight range.
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Affiliation(s)
- M Hoopmann
- Department of Obstetrics and Gynecology, University of Tübingen, Tübingen, Germany
| | - K O Kagan
- Department of Obstetrics and Gynecology, University of Tübingen, Tübingen, Germany
| | - A Sauter
- Department of Obstetrics and Gynecology, University of Tübingen, Tübingen, Germany
| | - H Abele
- Department of Obstetrics and Gynecology, University of Tübingen, Tübingen, Germany
| | - P Wagner
- Department of Obstetrics and Gynecology, University of Tübingen, Tübingen, Germany
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32
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Collins AR, Annangi B, Rubio L, Marcos R, Dorn M, Merker C, Estrela-Lopis I, Cimpan MR, Ibrahim M, Cimpan E, Ostermann M, Sauter A, Yamani NE, Shaposhnikov S, Chevillard S, Paget V, Grall R, Delic J, de-Cerio FG, Suarez-Merino B, Fessard V, Hogeveen KN, Fjellsbø LM, Pran ER, Brzicova T, Topinka J, Silva MJ, Leite PE, Ribeiro AR, Granjeiro JM, Grafström R, Prina-Mello A, Dusinska M. High throughput toxicity screening and intracellular detection of nanomaterials. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2016; 9. [PMID: 27273980 PMCID: PMC5215403 DOI: 10.1002/wnan.1413] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/08/2016] [Accepted: 04/12/2016] [Indexed: 12/25/2022]
Abstract
With the growing numbers of nanomaterials (NMs), there is a great demand for rapid and reliable ways of testing NM safety—preferably using in vitro approaches, to avoid the ethical dilemmas associated with animal research. Data are needed for developing intelligent testing strategies for risk assessment of NMs, based on grouping and read‐across approaches. The adoption of high throughput screening (HTS) and high content analysis (HCA) for NM toxicity testing allows the testing of numerous materials at different concentrations and on different types of cells, reduces the effect of inter‐experimental variation, and makes substantial savings in time and cost. HTS/HCA approaches facilitate the classification of key biological indicators of NM‐cell interactions. Validation of in vitroHTS tests is required, taking account of relevance to in vivo results. HTS/HCA approaches are needed to assess dose‐ and time‐dependent toxicity, allowing prediction of in vivo adverse effects. Several HTS/HCA methods are being validated and applied for NM testing in the FP7 project NANoREG, including Label‐free cellular screening of NM uptake, HCA, High throughput flow cytometry, Impedance‐based monitoring, Multiplex analysis of secreted products, and genotoxicity methods—namely High throughput comet assay, High throughput in vitro micronucleus assay, and γH2AX assay. There are several technical challenges with HTS/HCA for NM testing, as toxicity screening needs to be coupled with characterization of NMs in exposure medium prior to the test; possible interference of NMs with HTS/HCA techniques is another concern. Advantages and challenges of HTS/HCA approaches in NM safety are discussed. WIREs Nanomed Nanobiotechnol 2017, 9:e1413. doi: 10.1002/wnan.1413 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Andrew R Collins
- Comet Biotech AS, and Department of Nutrition, University of Oslo, Norway
| | | | - Laura Rubio
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Ricard Marcos
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain.,CIBER Epidemiología y Salud Pública, ISCIII, Spain
| | - Marco Dorn
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Carolin Merker
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Mihaela Roxana Cimpan
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Mohamed Ibrahim
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Emil Cimpan
- Department of Electrical Engineering, Faculty of Engineering, Bergen University College, Norway
| | - Melanie Ostermann
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Alexander Sauter
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Naouale El Yamani
- Comet Biotech AS, and Department of Nutrition, University of Oslo, Norway.,Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | | | - Sylvie Chevillard
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Vincent Paget
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Romain Grall
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Jozo Delic
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | | | | | - Valérie Fessard
- ANSES Fougères Laboratory, Contaminant Toxicology Unit, France
| | | | - Lise Maria Fjellsbø
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | - Elise Runden Pran
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | - Tana Brzicova
- Institute of Experimental Medicine AS CR, Prague, Czech Republic
| | - Jan Topinka
- Institute of Experimental Medicine AS CR, Prague, Czech Republic
| | - Maria João Silva
- Human Genetics Department, National Institute of Health Doutor Ricardo Jorge and Centre for Toxicogenomics and Human Health, NMS/FCM, UNL, Lisbon, Portugal
| | - P E Leite
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - A R Ribeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - J M Granjeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - Roland Grafström
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Adriele Prina-Mello
- Nanomedicine Group, Trinity Centre for Health Sciences, Trinity College Dublin, Dublin, Ireland
| | - Maria Dusinska
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
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Kramer B, Hock C, Birk R, Sauter A, Stuck BA, Hörmann K, Schultz JD, Aderhold C. Targeted Therapies in HPV-positive and -negative HNSCC - Alteration of EGFR and VEGFR-2 Expression In Vitro. Anticancer Res 2016; 36:2799-2807. [PMID: 27272791] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 05/10/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Angiogenesis plays a crucial role in the formation and progression of tumor growth in head and neck squamous cell carcinoma (HNSCC). The tyrosine kinase receptors epidermal growth factor receptor (EGFR) and vascular endothelial growth factor receptor (VEGFR) are essential for mediation of pro-angiogenic signals. Nilotinib, dasatinib, erlotinib and gefitinib are tyrosine kinase inhibitors and approved as targeted therapies for several tumor entities other than HNSCC. In this study, we sought to evaluate the alteration of EGFR and VEGFR-2 expression by these tyrosine kinase inhibitors with respect to the human papillomavirus (HPV)-status in squamous cell carcinoma (SCC) tumor cells. MATERIALS AND METHODS Expression patterns of EGFR and VEGFR-2 were determined by enzyme linked immunosorbent assay (ELISA) in HNSCC 11A, HNSCC 14C and p-16-positive CERV196 tumor cell lines. These cells were incubated with nilotinib, dasatinib, erlotinib and gefitinib (5-20μmol/l) and compared to a chemonaive control. The incubation time was 24, 48, 72 and 96 h. RESULTS All tested substances led to a statistically significant reduction (p<0.05) of EGFR protein expression levels in HPV-negative cells compared to the negative control. Surprisingly, a statistically significant increase in VEGFR-2 expression was observed after exposure to all tested substances especially after exposure to erlotinib treatment. CONCLUSION Nilotinib, dasatinib, erlotinib and gefitinib cause significant changes in protein expression of EGFR and VEGFR-2 in vitro. Besides the anti-angiogenic impact of the substances, as shown for the decrease of EGFR expression, we also observed an increase of VEGFR-2 expression. These contradictive effects could be interpreted as a compensatory up-regulation by the tumor cell.
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Affiliation(s)
- Benedikt Kramer
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
| | - Clemens Hock
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
| | - Richard Birk
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
| | - Alexander Sauter
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
| | - Boris A Stuck
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Karl Hörmann
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
| | - Johannes David Schultz
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
| | - Christoph Aderhold
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany
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Sauter A, Mc Duffie Y, Boehm H, Martinez A, Spatz JP, Appel S. Surface-mediated priming during in vitro generation of monocyte-derived dendritic cells. Scand J Immunol 2015; 81:56-65. [PMID: 25376441 DOI: 10.1111/sji.12246] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Revised: 06/16/2014] [Accepted: 10/21/2014] [Indexed: 11/28/2022]
Abstract
Ex vivo-generated human dendritic cells (DC) are most commonly generated from monocytes using standard cell culture dishes. To elucidate the effect of the plastic surface during the differentiation process, we compared a standard adhesive plastic dish with four different mainly non-adherent surfaces. Untouched monocytes were cultured for 3 days in the presence of IL-4 and GM-CSF. Time-lapse videos were recorded, and the phenotype of the cells was analysed by flow cytometry. The cytokine profiles were analysed using a 25-plex cytokine assay. The use of non-adherent surfaces led to a significant reduction in expression of CD14 and CD38, and a significant increase in expression of CD86 compared to standard culture dishes. Expression levels of DC-SIGN and PD-L2 were reduced significantly on cells cultured on non-adherent surfaces. The cytokine production was independent on the surface used. The surface-mediated priming should therefore be considered when aiming to induce specific immune responses. This is especially important with regard to DC-based immunotherapy, where an adjustment of the surface during the DC generation process might have highly beneficial effects.
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Affiliation(s)
- A Sauter
- Department of Biomedicine, University of Bergen, Bergen, Norway
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35
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Aderhold C, Grobschmidt GM, Sauter A, Faber A, Hörmann K, Schultz JD. Interleukin 4, interleukin 6 and osteopontin-serological markers of head and neck malignancy in primary diagnostics: A pilot study. Oncol Lett 2014; 8:1112-1118. [PMID: 25120668 PMCID: PMC4114600 DOI: 10.3892/ol.2014.2312] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 04/01/2014] [Indexed: 12/16/2022] Open
Abstract
The progression of head and neck squamous cell carcinoma (HNSCC) is stimulated by various angiogenic peptides and growth factors. A correlation between tumor progression and the secretion of various serological mediators in patients with malignant tumors of the head and neck is of major interest for tumor diagnostics, evaluation of the therapy response and it may predict prognosis by specifying the individual tumor biology. Established chemotherapeutic regimes for head and neck tumors usually consist of platinum-based chemotherapeutic drugs and 5-fluorouracil (5-FU). The present pilot study sought to assess the eligibility of seven serological factors as biomarkers for malignant tumors of the head and neck: Platelet-derived growth factor, vascular endothelial growth factor, epidermal growth factor receptor, osteopontin, granulocyte-colony stimulating factor, interleukin-4 (IL-4) and IL-6. The serum levels of each factor in 20 patients receiving concomitant radiochemotherapy with cisplatin or carboplatin and 5-FU with curative intent were determined prior and subsequent to chemotherapy and were compared with 40 healthy controls. Another aim of the pilot study was to investigate whether the serum of patients showed significant differences in the concentrations of the analyzed factors at the start of concomitant radiochemotherapy compared with the controls, whether those markers indicated a neoplastic process and whether concomitant radiochemotherapy with cisplatin or carboplatin and 5-FU induced significant alterations of concentration compared with pre-therapeutic levels. The included patients were histopathologically diagnosed with HNSCC and the average age was 62.3 years. The serum samples of the patients were obtained during the course of regular pre- and post-chemotherapeutic blood draws one week prior to the start of radiochemotherapy and one week following the completion of chemotherapy. The healthy controls were collected from patients of the Sleep Laboratory of the Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital (Mannheim, Germany) without clinical evidence or laboratory signs of inflammation or history of a malignant disease. The average age was 50.3 years. The serological level of each factor was ascertained by enzyme-linked immunosorbent assay in duplicate. Serum levels of IL-4, IL-6 and osteopontin were significantly increased in patients with HNSCC compared with those in chemotherapy-naive healthy controls. IL-4 and osteopontin showed no significant therapy-associated alterations. Notably, IL-6 levels significantly increased post-therapeutically. Using logistic regression with osteopontin and IL-4, an individual risk-profile for random samples was calculated. IL-4, IL-6 and osteopontin appear to be suitable indicators of the neoplastic process as they are significantly increased in HNSCC patients compared with the control group. With the exception of IL-6, whose levels were in fact increased following therapy, a significant therapy-associated alteration of these factors was missing. Therefore, these serological markers failed to predict the therapy response, but they may be valuable as a screening instrument in primary diagnostics.
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Affiliation(s)
- Christoph Aderhold
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim D-68167, Germany
| | - Guido Manuel Grobschmidt
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim D-68167, Germany
| | - Alexander Sauter
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim D-68167, Germany
| | - Anne Faber
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim D-68167, Germany
| | - Karl Hörmann
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim D-68167, Germany
| | - Johannes David Schultz
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim D-68167, Germany
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Birk R, Grossbaier J, Aderhold C, Stern-Sträter J, Hörmann K, Sauter A, Sommer JU. Anti-inflammatory effects of polihexanide and polyethylene glycol in an in vitro study in chronic rhinosinusitis. In Vivo 2014; 28:489-494. [PMID: 24982214] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The majority of patients affected by chronic rhinosinusitis (CRS) suffer from eosinophilic infiltration. We hypothesised that polihexanide and polyethylene glycol as an antiseptic might alter the eosinophil-associated IL-5 and eotaxin-3 expression in CRS and also the expression of MMP-9, being involved in the tissue-remodelling in CRS. After obtaining samples from 10 CRS patients with (CRSwNP) and without nasal-polyposis (CRSsNP) and 2 patients with inverted-papilloma undergoing functional endoscopic sinus surgery (FESS), the expression of interleukin-5, eotaxin-3 and MMP-9 were evaluated by an ELISA assay with and without the tested agent. CRSwNP showed a significantly increased expression of IL-5. Polihexanide seems not to alter the attraction of eosinophils in patients with CRS via IL-5 expression. Also elevated levels of MMP-9 could not be reduced to normal values. But there exists statistically significant evidence that the self-amplification process of eosinophils via eotaxin-3 could be influenced by the administration of polihexanide.
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Affiliation(s)
- Richard Birk
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Judith Grossbaier
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Christoph Aderhold
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Jens Stern-Sträter
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Karl Hörmann
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Alexander Sauter
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - J Ulrich Sommer
- Department of Otorhinolaryngology Head and Neck Surgery, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Kaufmann S, Horger M, Schulze M, Spira D, Sauter A. Comparison of volume perfusion computed tomography (VPCT) and contrast-enhanced ultrasound (CEUS) for assessment of therapeutic effect of transarterial chemoembolisation (TACE). ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Sauter A. [Obstructive sleep apnea--non-surgical therapeutic options]. MMW Fortschr Med 2013; 155:53-56. [PMID: 24482937 DOI: 10.1007/s15006-013-2442-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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39
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Schulze M, Spira D, Claussen CD, Sauter A, Mayer F, Horger M. Characterization of incidental cardiac masses in oncological patients using a new CT-based tumor volume perfusion technique. Acta Radiol 2013; 54:895-903. [PMID: 23828946 DOI: 10.1177/0284185113488020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 12/30/2022]
Abstract
Cardiac masses are challenging for non-invasive diagnostic procedures and therapy, respectively. In tumor patients differentiation between primary or secondary cardiac neoplasm and thrombus is a frequent and knowingly difficult task to manage. To avoid complex and unnecessary surgical diagnostic procedures non-invasive methods are in favor. For initiation of adequate therapy and evaluation of prognosis, however, early and reliable diagnosis is mandatory. So far, echocardiography and magnetic resonance imaging represent the mainstay for cardiac imaging diagnosis. Recently, the new technique of CT-based tumor volume perfusion (VPCT) measurement has advanced to a potent, reliable, and easy to perform alternative for cardiac imaging. The purpose of this study was to review the existing spectrum of diagnostic modalities for characterization of cardiac masses in an oncologic patient cohort with emphasis on their strengths and limitations and to present the benefit from using the novel technique called VPCT for this purpose.
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Affiliation(s)
- M Schulze
- Department of Diagnostic and Interventional Radiology
| | - D Spira
- Department of Diagnostic and Interventional Radiology
| | - CD Claussen
- Department of Diagnostic and Interventional Radiology
| | - A Sauter
- Department of Diagnostic and Interventional Radiology
| | - F Mayer
- Department of Internal Medicine-Oncology, Eberhard-Karls-University, Tübingen, Germany
| | - M Horger
- Department of Diagnostic and Interventional Radiology
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Spira D, Wecker M, Spira SM, Hetzel J, Spengler W, Sauter A, Horger M. Does volume perfusion computed tomography enable differentiation of metastatic and non-metastatic mediastinal lymph nodes in lung cancer patients? A feasibility study. Cancer Imaging 2013; 13:323-31. [PMID: 23876521 PMCID: PMC3719054 DOI: 10.1102/1470-7330.2013.0033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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] [Accepted: 06/06/2013] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES To compare the perfusion characteristics of mediastinal lymph node metastases with those of non-metastatic nodes in patients with newly diagnosed lung cancer using volume perfusion computed tomography (VPCT). MATERIALS AND METHODS Between January 2010 and October 2011, 101 patients with histologically confirmed, untreated lung cancer received a 40-s VPCT of the tumor bulk; 32/101 patients had evident hilar/mediastinal metastatic disease and 17/101 patients had proven non-metastasized lymph nodes within the VPCT scan range. Validation or exclusion of metastatic node involvement was proven by mediastinoscopy, biopsy, positron emission tomography imaging and/or unequivocal volume dynamics on follow-up computed tomography. A total of 45 metastases and 23 non-metastatic lymph nodes were found within the scan range and subsequently evaluated. Blood flow (BF), blood volume (BV) and K(trans) were determined. Tumor volume was recorded as whole tumor volume. RESULTS In a comparison between metastatic and non-metastatic lymph nodes, we controlled for age, lymph node volume, lung tumor volume, lung tumor location, and histologic type effects and found no significant differences with respect to BF, BV, K(trans) or heterogeneity in nodal perfusion (P > 0.05, respectively), even after adjusting lymph node perfusion values to the perfusion parameters of the primary tumor (P > 0.05, respectively). Metastatic lymph node volume had a significant increasing effect on perfusion heterogeneity (P < 0.05, respectively) and BV in the primary was a highly significant factor for BV in metastatic disease (P < 0.001). CONCLUSION Perfusion characteristics of mediastinal metastatic and non-metastatic lymph nodes in untreated lung cancer show considerable overlap, so that a reliable differentiation via VPCT is not possible.
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Affiliation(s)
- Daniel Spira
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany.
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Sauter A, Richter G, Micoulet A, Martinez A, Spatz JP, Appel S. Effective polyethylene glycol passivation for the inhibition of surface interactions of peripheral blood mononuclear cells and platelets. Biointerphases 2013; 8:14. [PMID: 24706127 PMCID: PMC5849213 DOI: 10.1186/1559-4106-8-14] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 06/05/2013] [Accepted: 06/14/2013] [Indexed: 12/03/2022] Open
Abstract
The inhibition of unspecific adhesion of human white blood cells is a prerequisite for
applications requiring the control of defined surface interactions. In this study, a
passivation agent based on polyethylene glycol (PEG) for glass surfaces was investigated
for the use with human peripheral blood mononuclear cells (PBMC). The grafting of 2000
g/mol methoxy-terminated PEG-urea-triethoxysilane (mPEG2000) onto glass surfaces
successfully inhibited unspecific spreading of both human PBMC and platelets in all
experiments. The prevention of surface interactions was independent on the anticoagulant
used during blood collection. The total efficiency to prevent even transient
immobilization of PBMC to the PEG modified surfaces was 97 ± 2%. This makes the
passivation with PEG a well suited surface modification for preventing unspecific surface
interaction in order to study only defined surface interactions of human PBMC.
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Affiliation(s)
- Alexander Sauter
- Department of Clinical Science, Broegelmann Research Laboratory, University of Bergen, Laboratory building 5th floor, Bergen, 5021, Norway,
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Umbreit C, Aderhold C, Faber A, Sommer JU, Sauter A, Hofheinz RD, Stern-Sträter J, Hoermann K, Schultz JD. Unexpected alteration of β-catenin and c-KIT expression by 5-FU and docetaxel in p16-positive squamous cell carcinoma compared to HPV-negative HNSCC cells in vitro. Anticancer Res 2013; 33:2457-2465. [PMID: 23749896] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Head and neck squamous cell carcinoma (HNSCC) is the sixth most common type of cancer worldwide. In several tumour entities, the tyrosine kinase receptor c-KIT is associated with tumour transformation in the epithelial tissue in cases of aberrant expression. Furthermore, tumour development and dissemination are a result of dysregulated cellular pathways such as the WNT/β-catenin pathway. β-Catenin is a multifunctional protein within the canonical WNT signalling pathway and a pivotal factor for the stabilization of cell-cell interactions. In malignant tissues, β-catenin triggers tumour proliferation and progression. The aim of this study is to investigate the expression patterns of c-KIT and β-catenin in human papillomavirus-negative and p16-positive SCC and to evaluate the chemosensitivity of the tumour cells to the chemotherapeutical agents docetaxel and 5-fluorouracil (5-FU). MATERIALS AND METHODS We incubated the tumour cell lines with docetaxel (5 μmol/ml) and 5-FU (1 μmol/ml) and detected β-catenin and c-KIT by immunohistochemistry and enzyme-linked immunosorbent assay (ELISA) after 48, 72, 120, 192 and 240 h. RESULTS We found a reliable trend towards decreased β-catenin expression levels in p16-positive and p16-negative tumour cell lines when incubated with docetaxel, in addition to induced apoptotic effect. At best, 5-FU had a slight influence on the alteration of the expression of β-catenin. Dose escalation of docetaxel and 5-FU had no statistically significant effect on the expression of β-catenin or c-KIT. In HPV-negative HNSCC, a reduced expression level of β-catenin and c-KIT was detected in an incubation period-dependent manner. p16-transformed SCC (CERV196) cells were characterized by a reduced susceptibility to docetaxel induced alteration of β-catenin expression. CONCLUSION We were unable to confirm the clinically-substantiated increased chemosensitivity of p16-positive tumour cells in vitro. Extended studies and clinical trials are needed to investigate these findings further in HPV-associated HNSCC.
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Affiliation(s)
- Claudia Umbreit
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty of Mannheim, University of Heidelberg, Mannheim, Germany.
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Aderhold C, Umbreit C, Faber A, Sauter A, Sommer JU, Birk R, Erben P, Hofheinz RD, Stern-Straeter J, Hörmann K, Schultz JD. Chemotherapeutic alteration of VEGF, PDGF and PDGFRα/β expression under 5-FU vs. docetaxel in HPV-transformed squamous cell carcinoma compared to HPV-negative HNSCC in vitro. Anticancer Res 2013; 33:1951-1961. [PMID: 23645743] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Head and neck squamous cell carcinoma (HNSCC) is the most common malignant epithelial tumor in the upper aerodigestive tract. The incidence of HNSCC induced by the oncogenic human papilloma virus (HPV) is rising, indicating a growing importance of the viral etiology. Cell proliferation, migration and tumor vascularization are regulated by a set of angiogenic peptides such as PDGF (platelet-derived growth factor), PDGFRα/β (platelet-derived growth factor receptor α/β) and VEGF (vascular endothelial growth factor). In locally advanced HNSCC docetaxel is used for induction chemotherapy (ICT) combined with platinum-based chemotherapy and 5-fluorouracil (5-FU). This study sought to evaluate the expression of angiogenic factors (VEGF, PDGF and PDGFRα/β) in HPV-positive (CERV196) and HPV-negative squamous cell carcinoma (HNSCC 11A and 14C) and the efficacy of chemotherapy with docetaxel as a potential treatment modality, compared to 5-FU as a single-drug application. MATERIALS AND METHODS Tumor cell lines were incubated with 5-FU or docetaxel at a concentration of 1.0 and 5.0 μmol/ml. Enzyme-linked immunosorbent assay (ELISA) and immunohistochemical analyses were carried out after 48, 72, 120, 192 and 240 hours, in order to identify changes in protein expression of VEGF, PDGF and PDGFRα/β. RESULTS We demonstrated a significant reduction of VEGF and PDGFRβ expression after incubation with docetaxel by ELISA and of PDGF by immunohistochemistry, irrespective of the HPV status, whereas the application of 5-FU had a significantly weaker impact on the expression of angiogenic peptides. HPV-positive CERV196 cells were characterized by a reduced susceptibility to a docetaxel-altered expression. CONCLUSION Although neither of the applied drugs are selective anti-angiogenic agents, docetaxel surprisingly was demonstrated to cause a significant decrease of angiogenic factors in this study.
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MESH Headings
- Antimetabolites, Antineoplastic/pharmacology
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Biomarkers, Tumor/metabolism
- Blotting, Western
- Carcinoma, Squamous Cell/drug therapy
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/virology
- Cell Proliferation/drug effects
- Cell Transformation, Viral/drug effects
- Docetaxel
- Enzyme-Linked Immunosorbent Assay
- Fluorouracil/pharmacology
- Head and Neck Neoplasms/drug therapy
- Head and Neck Neoplasms/metabolism
- Head and Neck Neoplasms/virology
- Human papillomavirus 16/pathogenicity
- Humans
- Immunoenzyme Techniques
- In Vitro Techniques
- Papillomavirus Infections/drug therapy
- Papillomavirus Infections/metabolism
- Papillomavirus Infections/virology
- Platelet-Derived Growth Factor/metabolism
- Receptor, Platelet-Derived Growth Factor alpha/metabolism
- Receptor, Platelet-Derived Growth Factor beta/metabolism
- Taxoids/pharmacology
- Tumor Cells, Cultured
- Vascular Endothelial Growth Factor A/metabolism
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Affiliation(s)
- Christoph Aderhold
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Mannheim, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany.
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Kaufmann S, Sauter A, Spira D, Gatidis S, Ketelsen D, Heuschmid M, Claussen CD, Thomas C. Tin-filter enhanced dual-energy-CT: image quality and accuracy of CT numbers in virtual noncontrast imaging. Acad Radiol 2013; 20:596-603. [PMID: 23490736 DOI: 10.1016/j.acra.2013.01.010] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 01/08/2013] [Accepted: 01/09/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To measure and compare the objective image quality of true noncontrast (TNC) images with virtual noncontrast (VNC) images acquired by tin-filter-enhanced, dual-source, dual-energy computed tomography (DECT) of upper abdomen. MATERIALS AND METHODS Sixty-three patients received unenhanced abdominal CT and enhanced abdominal DECT (100/140 kV with tin filter) in portal-venous phase. VNC images were calculated from the DECT datasets using commercially available software. The mean attenuation of relevant tissues and image quality were compared between the TNC and VNC images. Image quality was rated objectively by measuring image noise and the sharpness of object edges using custom-designed software. Measurements were compared using Student two-tailed t-test. Correlation coefficients for tissue attenuation measurements between TNC and VNC were calculated and the relative deviations were illustrated using Bland-Altman plots. RESULTS Mean attenuation differences between TNC and VNC (HUTNC - HUVNC) image sets were as follows: right liver lobe -4.94 Hounsfield units (HU), left liver lobe -3.29 HU, vena cava -2.19 HU, spleen -7.46 HU, pancreas 1.29 HU, fat -11.14 HU, aorta 1.29 HU, bone marrow 36.83 HU (all P < .05); right kidney 0.46 HU, left kidney 0.56 HU, vena portae -0.48 HU and muscle -0.62 HU (nonsignificant). Good correlations between VNC and TNC series were observed for liver, vena portae, kidneys, pancreas, muscle and bone marrow (Pearson's correlation coefficient ≥0.75). Mean image noise was significantly higher in TNC images (P < .0001). Measurements of edge sharpness revealed no significant differences between VNC and TNC images (P = .19). CONCLUSION The Hounsfield units in VNC images closely resemble TNC images in the majority of the organs of the upper abdomen (kidneys, liver, pancreas). In spleen and fat, Hounsfield numbers in VNC images are tend to be higher than in TNC images. VNC images show a low image noise and satisfactory edge sharpness. Other criteria of image quality and the depiction of certain lesions need to be evaluated additionally.
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Affiliation(s)
- Sascha Kaufmann
- Department of Radiology, Diagnostic and Interventional Radiology, Hoppe-Seyler-Str. 3, 72076 Tuebingen, Germany.
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Schmidt H, Brendle C, Schraml C, Martirosian P, Bezrukov I, Hetzel J, Müller M, Sauter A, Claussen CD, Pfannenberg C, Schwenzer NF. Correlation of Simultaneously Acquired Diffusion-Weighted Imaging and 2-Deoxy-[18F] fluoro-2-D-glucose Positron Emission Tomography of Pulmonary Lesions in a Dedicated Whole-Body Magnetic Resonance/Positron Emission Tomography System. Invest Radiol 2013; 48:247-55. [DOI: 10.1097/rli.0b013e31828d56a1] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Spira D, Grünwald L, Vogel W, Sauter A, Spira SM, Claussen CD, Horger M. Die Volumen-Perfusions-CT (VPCT) erkennt Chemotherapie-induzierte Perfusionsänderungen bei Lymphomen in der Interim-Situation. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bendtsen TF, Soeballe K, Petersen EM, Moriggl B, Sauter A, Strid J, Boerglum J. Ultrasound Guided Single Injection Lumbosacral Plexus Blockade For Hip Surgery Anaesthesia. Br J Anaesth 2013. [DOI: 10.1093/bja/el_9982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Betz MJ, Hatiboglu N, Mauracher B, Hadaschik D, Sauter A, Demmelmair H, Koletzko B, Beuschlein F, Slawik M. Mc2 receptor knockdown modulates differentiation and lipid composition in adipocytes. Horm Metab Res 2012; 44:670-5. [PMID: 22723268 DOI: 10.1055/s-0032-1314854] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The melanocortin system is involved in central and peripheral regulation of energy homeostasis. In adipocytes, the melanocortin 2 receptor (MC2R) transmits ACTH-dependent signaling and its expression rises substantially during adipocyte differentiation. An in vitro system of retrovirally expressed shRNA directed against Mc2r mRNA in 3T3-L1 cells was established and effects of Mc2r knockdown (kd) in comparison to cells expressing non-targeting shRNA (control) were explored in differentiated adipocytes. Morphology, gene expression, lipolysis and fatty acid composition were analyzed. While gross morphology was unchanged extractable amount of lipids was reduced to 70-80% in kd cell lines (p<0.01). Moreover, expression changes of Pparγ2, aP2, and Pref1 indicated reduced differentiation in Mc2r kd cells. Intriguingly, not only ACTH, but also norepinephrine stimulated lipolysis were substantially reduced demonstrating functional significance of MC2R for general lipolysis pathway. Analysis of fatty acid composition in triglyceride and phospholipid fractions showed a lowered ratio of C16:1/C16:0 and C18:1/C18:0, but increased concentrations of arachidonic acid upon Mc2r knockdown. Reduction of mono-unsaturated fatty acids (MUFAs) was associated with lower expression of stearoyl-Coenzyme A desaturase 1 and 2 in kd cells (21 ± 8% vs. 100 ± 13%, p=0.01 and 32 ± 3% vs. 100 ± 15%, p=0.046). Conversely, high doses of ACTH resulted in gene expression changes, mirroring Mc2r knockdown (higher Pparγ2, Scd1, Hsl expression). MC2R plays an important role for regular lipolytic function and lipid composition in 3T3-L1 adipocytes. Of interest, desaturase expression was reduced and MUFA content accordingly altered in kd cells.
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Affiliation(s)
- M J Betz
- Endocrine Research Unit, Medizinische Klinik und Poliklinik IV, Munich, Germany
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Schulze M, Vogel W, Spira D, Sauter A, Hetzel J, Horger M. Reduced perfusion in pulmonary infiltrates of high-risk hematologic patients is a possible discriminator of pulmonary angioinvasive mycosis: a pilot volume perfusion computed tomography (VPCT) study. Acad Radiol 2012; 19:842-50. [PMID: 22498759 DOI: 10.1016/j.acra.2012.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Revised: 02/20/2012] [Accepted: 03/02/2012] [Indexed: 11/27/2022]
Abstract
RATIONALE AND OBJECTIVES The aim of this study was to assess perfusion parameters in atypical pneumonia of heavily immunocompromised hematologic patients suspected of having invasive mycosis using volume perfusion computed tomography and establish their diagnostic role. MATERIALS AND METHODS Volume perfusion computed tomographic data from 21 consecutive immunocompromised patients presenting with atypical parenchymal opacity of consolidation were analyzed with respect to the degree of perfusion of their pneumonias. All patients presented with clinical and laboratory signs of infection. Seventeen patients (10 men, seven women; mean age, 57 years; age range, 19-76 years) were found with proven (n = 9), probable (n = 2), or possible (n = 6) angioinvasive mycosis. One patient was diagnosed with bronchoinvasive aspergillosis. Four patients (all men; mean age, 71 years; age range, 67-79 years) were diagnosed with bacterial pneumonia. Volume perfusion computed tomography of the involved pulmonary areas was performed at 80 kV and 60 mAs, with 26 measurement points distributed over 65.9 seconds. Fifty milliliters of contrast material was injected at a rate of 5 mL/s, followed by a 50-mL saline chaser. Entire coverage of the pneumonic parenchymal consolidation was obtained in all patients, with the generation of parametric maps of blood flow (BF) using the maximal slope model and blood volume (BV) using Patlak analysis. The results of perfusion measurements were then analyzed and evaluated for all patients. RESULTS Patients with proven, probable, or possible angioinvasive pulmonary fungal infection revealed very low levels of perfusion of their parenchymal consolidations, with BFs ranging from 0.01 to 23.86 mL/100 mL tissue/min and BVs ranging from 0.88 to 10.67 mL/100 mL tissue, lower than those of the adjacent thoracic musculature and of bacterial pneumonias. Bacterial pneumonias showed all increased perfusion parameters, with BFs ranging from 30.49 to 41.65 mL/100 mL tissue/min and BVs ranging from 10.07 to 49.90 mL/100 mL tissue. The cutoff BF value for differentiation was 23.89 mL/100 mL tissue/min, and the cutoff BV value was 9.6 mL/100 mL tissue. CONCLUSIONS Patients with angioinvasive pulmonary mycosis showed lower perfusion parameters on volume perfusion computed tomography compared to those experiencing bacterial pneumonia.
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Schwenzer NF, Schraml C, Müller M, Brendle C, Sauter A, Spengler W, Pfannenberg AC, Claussen CD, Schmidt H. Pulmonary lesion assessment: comparison of whole-body hybrid MR/PET and PET/CT imaging--pilot study. Radiology 2012; 264:551-8. [PMID: 22653189 DOI: 10.1148/radiol.12111942] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE To compare the performance of magnetic resonance (MR)/positron emission tomography (PET) imaging in the staging of lung cancer with that of PET/computed tomography (CT) as the reference standard and to compare the quantification accuracy of a new whole-body MR/PET system with corresponding PET/CT data sets. MATERIALS AND METHODS Institutional review board approval and informed consent were obtained. Ten patients in whom bronchial carcinoma was proven or clinically suspected underwent clinically indicated fluorine 18 fluorodeoxyglucose (FDG) PET/CT and, immediately thereafter, whole-body MR/PET imaging with a new hybrid whole-body system (3.0-T MR imager with integrated PET system). Attenuation correction of MR/PET images was segmentation based with fat-water separation. Tumor-to-liver ratios were calculated and compared between PET/CT and MR/PET imaging. Tumor staging on the basis of the PET/CT and MR/PET studies was performed by two readers. Spearman rank correlation was used for comparison of data. RESULTS MR/PET imaging provided diagnostic image quality in all patients, with good tumor delineation. Most lesions (nine of 10) showed pronounced FDG uptake. One lesion was morphologically suspicious for malignancy at CT and MR imaging but showed no FDG uptake. MR/PET imaging had higher mean tumor-to-liver ratios than did PET/CT (4.4 ± 2.0 [standard deviation] for PET/CT vs 8.0 ± 3.9 for MR/PET imaging). Significant correlation regarding the tumor-to-liver ratio was found between both imaging units (ρ = 0.93; P < .001). Identical TNM scores based on MR/PET and PET/CT data were found in seven of 10 patients. Differences in T and/or N staging occurred mainly owing to modality-inherent differences in lesion size measurement. CONCLUSION MR/PET imaging of the lung is feasible and provides diagnostic image quality in the assessment of pulmonary masses. Similar lesion characterization and tumor stage were found in comparing PET/CT and MR/PET images in most patients.
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Affiliation(s)
- Nina F Schwenzer
- Department of Radiology, Eberhard-Karls University Tuebingen, Tuebingen, Germany
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