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Ashe J, Graf J, Madhavan R, Wallace K, Cotero V, Abate S, Pandey RK, Herzog R, Porindla SN, Shoudy D, Fan Y, Kao TJ, Puleo C. Investigation of liver-targeted peripheral focused ultrasound stimulation (pFUS) and its effect on glucose homeostasis and insulin resistance in type 2 diabetes mellitus: a proof of concept, phase 1 trial. QJM 2023; 116:667-685. [PMID: 37243693 DOI: 10.1093/qjmed/hcad098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 04/26/2023] [Indexed: 05/29/2023] Open
Abstract
BACKGROUND Mechanical waves produced by ultrasound pulses have been shown to activate mechanosensitive ion channels and modulate peripheral nerves. However, while peripheral ultrasound neuromodulation has been demonstrated in vitro and in pre-clinical models, there have been few reports of clinical tests. AIM We modified a diagnostic imaging system for ultrasound neuromodulation in human subjects. We report the first safety and feasibility outcomes in subjects with type 2 diabetes (T2D) mellitus and discuss these outcomes in relation to previous pre-clinical results. DESIGN The study was performed as an open label feasibility study to assess the effects of hepatic ultrasound (targeted to the porta hepatis) on glucometabolic parameters in subjects with T2D. Stimulation (peripheral focused ultrasound stimulation treatment) was performed for 3 days (i.e. 15 min per day), preceded by a baseline examination and followed by a 2-week observation period. METHODS Multiple metabolic assays were employed including measures of fasting glucose and insulin, insulin resistance and glucose metabolism. The safety and tolerability were also assessed by monitoring adverse events, changes in vital signs, electrocardiogram parameters and clinical laboratory measures. RESULTS AND CONCLUSION We report post-pFUS trends in several outcomes that were consistent with previous pre-clinical findings. Fasting insulin was lowered, resulting in a reduction of HOMA-IR scores (P-value 0.01; corrected Wilcoxon signed-rank test). Additional safety and exploratory markers demonstrated no device-related adverse impact of pFUS. Our findings demonstrate that pFUS represents a promising new treatment modality that could be used as a non-pharmaceutical adjunct or even alternative to current drug treatments in diabetes.
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Affiliation(s)
- J Ashe
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - J Graf
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - R Madhavan
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - K Wallace
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - V Cotero
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - S Abate
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - R K Pandey
- General Electric (GE) Research, Bengaluru, India
| | - R Herzog
- Yale Endocrinology & Metabolism, Yale School of Medicine, New Haven, CT, USA
| | - S N Porindla
- General Electric (GE) Research, Bengaluru, India
| | - D Shoudy
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - Y Fan
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - T-J Kao
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
| | - C Puleo
- General Electric (GE) Research, 1 Research Circle, Niskayuna, NY, USA
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Borges RM, Taujale R, de Souza JS, de Andrade Bezerra T, Silva ELE, Herzog R, Ponce FV, Wolfender JL, Edison AS. Dereplication of plant phenolics using a mass-spectrometry database independent method. Phytochem Anal 2018; 29:601-612. [PMID: 29808582 PMCID: PMC8962509 DOI: 10.1002/pca.2773] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/19/2018] [Accepted: 04/22/2018] [Indexed: 05/14/2023]
Abstract
INTRODUCTION Dereplication, an approach to sidestep the efforts involved in the isolation of known compounds, is generally accepted as being the first stage of novel discoveries in natural product research. It is based on metabolite profiling analysis of complex natural extracts. OBJECTIVE To present the application of LipidXplorer for automatic targeted dereplication of phenolics in plant crude extracts based on direct infusion high-resolution tandem mass spectrometry data. MATERIAL AND METHODS LipidXplorer uses a user-defined molecular fragmentation query language (MFQL) to search for specific characteristic fragmentation patterns in large data sets and highlight the corresponding metabolites. To this end, MFQL files were written to dereplicate common phenolics occurring in plant extracts. Complementary MFQL files were used for validation purposes. RESULTS New MFQL files with molecular formula restrictions for common classes of phenolic natural products were generated for the metabolite profiling of different representative crude plant extracts. This method was evaluated against an open-source software for mass-spectrometry data processing (MZMine®) and against manual annotation based on published data. CONCLUSION The targeted LipidXplorer method implemented using common phenolic fragmentation patterns, was found to be able to annotate more phenolics than MZMine® that is based on automated queries on the available databases. Additionally, screening for ascarosides, natural products with unrelated structures to plant phenolics collected from the nematode Caenorhabditis elegans, demonstrated the specificity of this method by cross-testing both groups of chemicals in both plants and nematodes.
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Affiliation(s)
- Ricardo M. Borges
- Complex Carbohydrate Research Centre (CCRC), Departments of Genetics and Biochemistry, Institute of Bioinformatics, University of Georgia, Athens, GA, USA
- Natural Product Research Institute Walter Mors (IPPN), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Rahil Taujale
- Complex Carbohydrate Research Centre (CCRC), Departments of Genetics and Biochemistry, Institute of Bioinformatics, University of Georgia, Athens, GA, USA
| | - Juliana Santana de Souza
- Natural Product Research Institute Walter Mors (IPPN), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Thaís de Andrade Bezerra
- Natural Product Research Institute Walter Mors (IPPN), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Eder Lana e Silva
- Natural Product Research Institute Walter Mors (IPPN), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | | | - Francesca V. Ponce
- Complex Carbohydrate Research Centre (CCRC), Departments of Genetics and Biochemistry, Institute of Bioinformatics, University of Georgia, Athens, GA, USA
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, CMU, Geneva, Switzerland
| | - Arthur S. Edison
- Complex Carbohydrate Research Centre (CCRC), Departments of Genetics and Biochemistry, Institute of Bioinformatics, University of Georgia, Athens, GA, USA
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3
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Schreiber C, Eilenberg MS, Panzenboeck A, Winter MP, Bergmeister H, Herzog R, Mascherbauer J, Lang IM, Bonderman D. Combined oral administration of L-arginine and tetrahydrobiopterin in a rat model of pulmonary arterial hypertension. Pulm Circ 2017; 7:89-97. [PMID: 28680568 PMCID: PMC5448548 DOI: 10.1086/689289] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 09/12/2016] [Indexed: 11/26/2022] Open
Abstract
Alterations in the nitric oxide (NO) pathway play a major role in pulmonary arterial hypertension (PAH). L-arginine (LA) and tetrahydrobiopterin (BH4) are main substrates in the production of NO, which mediates pulmonary vasodilation. Administration of either LA or BH4 decrease pulmonary artery pressure (PAP). A combined administration of both may have synergistic effects in the therapy of PAH. In a telemetrically monitored model of unilateral pneumonectomy and monocrotaline-induced PAH, male Sprague-Dawley rats received either LA (300 mg/kg; n = 15), BH4 (20 mg/kg; n = 15), the combination of LA and BH4 (300 mg/kg, 20 mg/kg; n = 15), or vehicle (control group; n = 10) from day 28 after monocrotaline induction. Therapy was orally administered once daily over consecutive 14 days. LA, BH4, or both equally lowered PAP, increased pulmonary vascular elasticity, restored spontaneous locomotoric activity, prevented body weight loss and palliated small vessel disease of severely pulmonary hypertensive rats. BH4 substitution lowered asymmetric dimethylarginine levels sustainably at 60 min after administration and downregulated endothelial NO synthase mRNA expression. No significant survival, macro- and histomorphologic or hemodynamic differences were found between therapy groups at the end of the study period. Administration of LA and BH4 both mediated a decrease of mean PAP, attenuated right ventricular hypertrophy and small vessel disease in monocrotaline-induced pulmonary hypertensive rats, though a combined administration of both substances did not reveal any synergistic therapy effects in our animal model.
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Affiliation(s)
- C Schreiber
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - M S Eilenberg
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - A Panzenboeck
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - M P Winter
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - H Bergmeister
- Institute of Biomedical Research, Medical University of Vienna, Austria
| | - R Herzog
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - J Mascherbauer
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - I M Lang
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - D Bonderman
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
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4
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Schreiber C, Eilenberg M, Panzenboeck A, Winter M, Bergmeister H, Herzog R, Mascherbauer J, Lang I, Bonderman D. Combined oral administration of L-arginine and tetrahydrobiopterin in a rat model of pulmonary arterial hypertension. Pulm Circ 2017. [DOI: 10.1177/2045893216677519] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- C. Schreiber
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - M.S. Eilenberg
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - A. Panzenboeck
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - M.P. Winter
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - H. Bergmeister
- Institute of Biomedical Research, Medical University of Vienna, Austria
| | - R. Herzog
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - J. Mascherbauer
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - I.M. Lang
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
| | - D. Bonderman
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Austria
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Surma MA, Herzog R, Vasilj A, Klose C, Christinat N, Morin-Rivron D, Simons K, Masoodi M, Sampaio JL. An automated shotgun lipidomics platform for high throughput, comprehensive, and quantitative analysis of blood plasma intact lipids. EUR J LIPID SCI TECH 2015; 117:1540-1549. [PMID: 26494980 PMCID: PMC4606567 DOI: 10.1002/ejlt.201500145] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 06/05/2015] [Accepted: 07/01/2015] [Indexed: 11/15/2022]
Abstract
Blood plasma has gained protagonism in lipidomics studies due to its availability, uncomplicated collection and preparation, and informative readout of physiological status. At the same time, it is also technically challenging to analyze due to its complex lipid composition affected by many factors, which can hamper the throughput and/or lipidomics coverage. To tackle these issues, we developed a comprehensive, high throughput, and quantitative mass spectrometry-based shotgun lipidomics platform for blood plasma lipid analyses. The main hallmarks of this technology are (i) it is comprehensive, covering 22 quantifiable different lipid classes encompassing more than 200 lipid species; (ii) it is amenable to high-throughput, with less than 5 min acquisition time allowing the complete analysis of 200 plasma samples per day; (iii) it achieves absolute quantification, by inclusion of internal standards for every lipid class measured; (iv) it is highly reproducible, achieving an average coefficient of variation of <10% (intra-day), approx. 10% (inter-day), and approx. 15% (inter-site) for most lipid species; (v) it is easily transferable allowing the direct comparison of data acquired in different sites. Moreover, we thoroughly assessed the influence of blood stabilization with different anticoagulants and freeze-thaw cycles to exclude artifacts generated by sample preparation. Practical applications: This shotgun lipidomics platform can be implemented in different laboratories without compromising reproducibility, allowing multi-site studies and inter-laboratory comparisons. This possibility combined with the high-throughput, broad lipidomic coverage and absolute quantification are important aspects for clinical applications and biomarker research.
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Affiliation(s)
| | | | | | | | | | | | | | - Mojgan Masoodi
- Nestlé Institute of Health Sciences S.A. Lausanne, Switzerland
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6
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Segura-Grau A, Herzog R, Díaz-Rodriguez N, Segura-Cabral JM. [Ultrasound of the urinary system]. Semergen 2015; 42:388-94. [PMID: 25982474 DOI: 10.1016/j.semerg.2015.03.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 06/06/2014] [Revised: 03/18/2015] [Accepted: 03/20/2015] [Indexed: 01/29/2023]
Abstract
Ultrasound techniques are able to provide a fairly complete examination of the urinary system, achieving a high sensitivity in relevant-pathology detection, especially in the kidney, bladder and prostate. Early detection of pathologies such as tumors or urinary tract obstructions, sometimes even before their clinical manifestation, has improved their management and prognosis in many cases. This, added to its low cost and harmlessness, makes ultrasound ideal for early approaches and follow-up of a wide number of urinary system pathologies. In this article, the ultrasound characteristics of the main urinary system pathologies that can be diagnosed by this technique, are reviewed.
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Affiliation(s)
- A Segura-Grau
- Unidad de Ecografía San Francisco de Asís, Madrid, España; Centro de Diagnóstico Ecográfico, Madrid, España; Grupo de Trabajo de Ecografía de SEMERGEN, Madrid, España
| | - R Herzog
- Unidad de Ecografía San Francisco de Asís, Madrid, España; Centro de Diagnóstico Ecográfico, Madrid, España; Grupo de Trabajo de Ecografía de SEMERGEN, Madrid, España; Servicio de Atención Rural, Mejorada del Campo, Madrid, España.
| | - N Díaz-Rodriguez
- Centro de Salud A Valenza, Ourense, España; Grupo de Trabajo de Ecografía de SEMERGEN, Ourense, España
| | - J M Segura-Cabral
- Unidad de Ecografía San Francisco de Asís, Madrid, España; Centro de Diagnóstico Ecográfico, Madrid, España
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Huzly D, Umhau M, Bettinger D, Cathomen T, Emmerich F, Hasselblatt P, Hengel H, Herzog R, Kappert O, Maassen S, Schorb E, Schulz-Huotari C, Thimme R, Unmüssig R, Wenzel JJ, Panning M. Transfusion-transmitted hepatitis E in Germany, 2013. Euro Surveill 2014; 19. [DOI: 10.2807/1560-7917.es2014.19.21.20812] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The reported IgG seroprevalence against hepatitis E virus (HEV) in German blood donations is 6.8%, and HEV RNA detected in 0.08%, but documented evidence for HEV transmission is lacking. We identified two donations from a single donor containing 120 IU HEV RNA/mL plasma and 490 IU/mL. An infectious dose of 7,056 IU HEV RNA was transmitted via apheresis platelets to an immunosuppressed patient who developed chronic HEV. Further, transmission was probable in an immunocompetent child.
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Affiliation(s)
- D Huzly
- Institute for Virology, University Medical Center, Freiburg, Germany
| | - M Umhau
- Institute for Cell and Gene Therapy, University Medical Center, Freiburg, Germany
| | - D Bettinger
- Department of Medicine II, University Medical Center, Freiburg, Germany
| | - T Cathomen
- Institute for Cell and Gene Therapy, University Medical Center, Freiburg, Germany
| | - F Emmerich
- Institute for Cell and Gene Therapy, University Medical Center, Freiburg, Germany
| | - P Hasselblatt
- Department of Medicine II, University Medical Center, Freiburg, Germany
| | - H Hengel
- Institute for Virology, University Medical Center, Freiburg, Germany
| | - R Herzog
- Institute for Cell and Gene Therapy, University Medical Center, Freiburg, Germany
| | - O Kappert
- Public Health Office, Freiburg, Germany
| | - S Maassen
- Public Health Office, Freiburg, Germany
| | - E Schorb
- Department of Medicine I, University Medical Center, Freiburg, Germany
| | - C Schulz-Huotari
- Institute for Cell and Gene Therapy, University Medical Center, Freiburg, Germany
| | - R Thimme
- Department of Medicine II, University Medical Center, Freiburg, Germany
| | | | - J J Wenzel
- Institute of Clinical Microbiology and Hygiene, Regensburg University Medical Center, Regensburg, Germany
| | - M Panning
- Institute for Virology, University Medical Center, Freiburg, Germany
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Kratochwill K, Boehm M, Herzog R, Kuster L, Gleiss A, Aufricht C, Vychytil A, Prasad N, Singh K, Prasad K, Gupta A, Bhadauria D, Perez J, Selgas R, Prieto M, Sanchez JA, Remon C, Latus J, Habib SM, Kitterer D, Korte M, Ulmer C, Fritz P, Davies S, Lambie M, Alscher MD, Betjes M, Segerer S, Braun N, Kitterer D, Latus J, Ulmer C, Alscher MD, Segerer S, Braun N, Herzog R, Gluxam T, Becker J, Vychytil A, Aufricht C, Kratochwill K. PERITONEAL DIALYSIS. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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9
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Bayer M, Sladovnik P, Herzog R, Kern L. Das Mounier-Kuhn-Syndrom – eine seltene Ursache rezidivierender Bronchitiden. Dtsch Med Wochenschr 2014; 139:722-5. [DOI: 10.1055/s-0034-1369903] [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: 10/25/2022]
Affiliation(s)
- M. Bayer
- Medizinische Klinik, Zuger Kantonsspital, Baar
| | | | - R. Herzog
- Medizinische Klinik, Zuger Kantonsspital, Baar
| | - L. Kern
- Herz & Lungen Zentrum, Zuger Kantonsspital, Baar
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10
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Abstract
A commonly accepted LIPID MAPS classification recognizes eight major lipid categories and over 550 classes, while new lipid classes are still being discovered by targeted biochemical approaches. Despite their compositional diversity, complex lipids such as glycerolipids, glycerophospholipids, saccharolipids, etc. are constructed from unique structural moieties, e.g., glycerol, fatty acids, choline, phosphate, and trehalose, that are linked by amide, ether, ester, or glycosidic bonds. This modular organization is also reflected in their MS/MS fragmentation pathways, such that common building blocks in different lipid classes tend to generate common fragments. We take advantage of this stereotyped fragmentation to systematically screen for new lipids sharing distant structural similarity to known lipid classes and have developed a discovery approach based on the computational querying of shotgun mass spectra by LipidXplorer software. We applied this concept for screening lipid extracts of C. elegans larvae at the dauer and L3 stages that represent alternative developmental programs executed in response to environmental challenges. The search, covering more than 1.5 million putative chemical compositions, identified a novel class of lyso-maradolipids specifically enriched in dauer larvae.
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Affiliation(s)
- Cyrus Papan
- Max Planck Institute for Cell Biology and Genetics , Pfotenhauerstraße 108, 01307 Dresden, Germany
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11
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Göcze I, Herzog R, Koch M, Renner P, Zeman F, Graf BM, Schlitt HJ, Bein T. Postoperative acute kidney injury can be predicted by the novel biomarkers insulin-like growth factor-binding protein 7/tissue inhibitor of metalloproteinases-2 as early as 6 hours after surgery. Crit Care 2014. [PMCID: PMC4069451 DOI: 10.1186/cc13569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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12
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Herzog R, Schwudke D, Shevchenko A. LipidXplorer: Software for Quantitative Shotgun Lipidomics Compatible with Multiple Mass Spectrometry Platforms. ACTA ACUST UNITED AC 2013; 43:14.12.1-14.12.30. [PMID: 26270171 DOI: 10.1002/0471250953.bi1412s43] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
LipidXplorer is an open-source software kit that supports the identification and quantification of molecular species of any lipid class detected by shotgun experiments performed on any mass spectrometry platform. LipidXplorer does not rely on a database of reference spectra: instead, lipid identification routines are user defined in the declarative molecular fragmentation query language (MFQL). The software supports batch processing of multiple shotgun acquisitions by high-resolution mass mapping, precursor and neutral-loss scanning, and data-dependent MS/MS lending itself to a variety of lipidomics applications in cell biology and molecular medicine.
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Affiliation(s)
- Ronny Herzog
- MPI of Molecular Cell Biology and Genetics, Dresden, Germany.,Lipotype GmbH, Dresden, Germany
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13
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Rusai K, Herzog R, Kuster L, Kratochwill K, Aufricht C. GSK-3β inhibition protects mesothelial cells during experimental peritoneal dialysis through upregulation of the heat shock response. Cell Stress Chaperones 2013; 18:569-79. [PMID: 23494401 PMCID: PMC3745257 DOI: 10.1007/s12192-013-0410-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 01/29/2013] [Accepted: 01/31/2013] [Indexed: 02/04/2023] Open
Abstract
Non-physiological components of peritoneal dialysis fluids (PDF) lead to the injury of peritoneal mesothelial cells resulting in the failure of peritoneal dialysis (PD) potentially via inadequate induction of the protective heat shock response (HSR). Glycogen synthase kinase-3β (GSK-3β) is a negative regulator of cell survival partly by suppression of the HSR and is influenced by stress stimuli also present in conventional PDF. The effects of PDF on GSK-3β activation and the impact of GSK-3β inhibition with lithium (LiCl) were investigated on cell survival with special regard to HSR, in particular to heat shock transcription factor 1 (HSF-1) activation and Hsp72 production in an in vitro model of PD using MeT-5A and primary mesothelial cells. Incubation of cells with the PDF Dianeal® (glucose-based, low pH, high glucose degradation products (GDP)) and Extraneal® (icodextrin-based, low pH, low GDP) caused activation of GSK-3β compared to the other tested PDF, i.e. Balance®, Physioneal® (normal pH, glucose-based, low GDP) and Nutrineal® (moderately acidic, amino acid-based). Inhibition of GSK-3β with LiCl in Dianeal® and Extraneal®-treated cells dose-dependently decreased cell damage and death rate and was paralleled by higher HSF-1 activation and Hsp72 expression. GSK-3β is activated by low pH GDP containing PDF with and without glucose as osmotic agent, indicating that GSK-3β is involved in mesothelial cell signalling in response to experimental PD. Inhibition of GSK-3β with LiCl ameliorated cell injury and improved HSR upon PDF exposure. Thus, GSK-3β inhibitors likely have therapeutic potential as cytoprotective additive for decreasing PDF toxicity.
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Affiliation(s)
- K. Rusai
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - R. Herzog
- />Zytoprotec GmbH, 1010 Vienna, Austria
| | - L. Kuster
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - K. Kratochwill
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- />Zytoprotec GmbH, 1010 Vienna, Austria
| | - C. Aufricht
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
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Göcze I, Herzog R, Graf BM, Agha A, Schlitt HJ, Pfister K, Jung E, Bein T. Contrast-enhanced ultrasonography in the ICU: promising tool or exciting toy? Crit Care 2013. [PMCID: PMC3642456 DOI: 10.1186/cc12123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Beck T, Trunova O, Herzog R, Singheiser L. TBCs for Gas Turbines under Thermomechanical Loadings: Failure Behaviour and Life Prediction. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20123302001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Liu J, Liu J, Liu Y, Xu Y, Zhao X, Qian J, Sun B, Xing C, Kanda R, Hamada C, Nakano T, Wakabayashi K, Io H, Horikoshi S, Tomino Y, Ishimatsu N, Miyamoto T, Morimoto H, Nakamata J, Baba R, Kanegae K, Serino R, Kabashima N, Otsuji Y, Doi Y, Tamura M, Nakamata J, Morimoto H, Baba R, Ishimatsu N, Miyamoto T, Kanegae K, Serino R, Kabashima N, Otsuji Y, Doi Y, Tamura M, Kusumoto T, Fukami K, Yamagishi SI, Ueda S, Kaida Y, Hazama T, Nakayama Y, Ando R, Obara N, Okuda S, Tamura M, Matsumoto M, Miyamoto T, Kanegae K, Furuno Y, Serino R, Kabashima N, Otsuji Y, Bang-Gee H, Mazzotta L, Rosati A, Carlini A, Henriques VT, Zangiacomi Martinez E, Divino-Filho JC, Pecoits-Filho R, Cardeal Da Costa JA, Henriques VT, Henriques VT, Gama Axelsson T, Lindholm B, Carrero JJ, Heimburger O, Stenvinkel P, Qureshi AR, Akazawa M, Uno T, Kanda E, Maeda Y, Aktsiali M, Aktsiali M, Antonopoulou S, Tsiolaki K, Bakirtzi N, Patrinou A, Georgopoulou M, Liaveri P, Afentakis N, Tsirpanlis G, Hasegawa T, Nishiwaki H, Hirose M, Komukai D, Tayama H, Koiwa F, Yoshimura A, Lui SL, Lui S, Yung S, Tang C, Ng F, Lo WK, Chan TM, Koo HM, Doh FM, Yoo DE, Oh HJ, Yoo TH, Choi KH, Kang SW, Han DS, Han SH, Fernandes N, Fernandes N, Bastos MG, Gianotti Franco MR, Chaoubah A, Gloria Lima MD, Pecoits-Filho R, Divino-Filho JC, Qureshi AR, Kang S, Do J, Cho K, Park J, Yoon K, Chen JB, Cheng BC, Chen TC, Su YJ, Wu CH, Park Y, Jeon J, Tsikeloudi M, Pateinakis P, Patsatsi K, Manou E, Sotiriadis D, Tsakiris D, Teixeira L, Rodrigues A, Carvalho MJ, Cabrita A, Mendonca D, Kang S, Do J, Park J, Cho K, Yoon K, Bruschi M, Candiano G, Santucci L, Luzio S, Cannavo R, Ghiggeri GM, Verrina E, Varadarajan Y, Raju B, Cho KH, Do J, Kang S, Park JW, Yoon KW, Kim TW, Kimmel M, Braun N, Latus J, Alscher MD, Struijk D, Van Esch S, Krediet RT, Fernandes N, Van den Beukel T, Hoekstra T, Tirapani L, De Andrade Bastos K, Pecoits-Filho R, Qureshi AR, Bastos M, Dekker F, Divino-Filho JC, Yasuhisa T, Kanai H, Harada K, Kawai Y, Sugiyama H, Ito Y, Tsuruya K, Yoshida H, Maruyama H, Goto S, Nakayama M, Nakamoto H, Morinaga H, Matsuo S, Makino H, DI Gioia MC, Gallar P, Laso N, Rodriguez I, Cobo G, Oliet A, Hynostroza J, Herrero JC, Mon C, Ortiz M, Vigil A, Tomo T, Portoles J, Uta S, Uta S, Tato AM, Lopez-Sanchez P, Rivera M, Rodriguez-Pena R, Del Peso G, Ortega M, Felipe C, Tsampikaki E, Aperis G, Kaikis A, Paliouras C, Karvouniaris N, Maragaki M, Alivanis P, Kortus-Gotze B, Hoferhusch T, Hoyer J, Martino F, Kaushik M, Rodighiero MP, Creapldi C, Ronco C, Lacquaniti A, Lacquaniti A, Donato V, Fazio MR, Lucisano S, Cernaro V, Lupica R, Buemi M, Aloisi C, Uno T, Akazawa M, Kanda E, Maeda Y, Bavbek Ruzgaresen N, Secilmis S, Yilmaz H, Akcay A, Duranay M, Akalin N, Akalin N, Altiparmak MR, Trabulus S, Yalin AS, Ataman R, Serdengecti K, Schneider K, Bator B, Niko B, Braun N, Peter F, Ulmer C, Joerg L, Martin K, Dagmar B, German O, Fabian R, Juergen D, Stephan S, Dominik A, Latus J, Latus J, Ulmer C, Fritz P, Rettenmaier B, Hirschburger S, Segerer S, Biegger D, Lang T, Ott G, Kimmel M, Alscher MD, Braun N, Habib M, Korte M, Hagen M, Dor F, Betjes M, Habib M, Hagen M, Korte M, Zietse R, Dor F, Betjes M, Latus J, Latus J, Ulmer C, Fritz P, Rettenmaier B, Biegger D, Lang T, Ott G, Scharpf C, Kimmel M, Alscher MD, Braun N, Habib M, Korte M, Zietse R, Betjes M, Chang TI, Shin DH, Oh HJ, Kang SW, Han DS, Yoo TH, Han SH, Choi HY, Lee YK, Kim BS, Han SH, Yoo TH, Park HC, Lee HY, Horimoto N, Tuji K, Kitamura S, Sugiyama H, Makino H, Isshiki R, Isshiki R, Iwagami M, Tsutsumi D, Mochida Y, Ishioka K, Oka M, Maesato K, Moriya H, Ohtake T, Hidaka S, Kobayashi S, Higuchi C, Tanihata Y, Ishii M, Sugimoto H, Sato N, Kyono A, Ogawa T, Nishimura H, Otsuka K, Cho KH, Do JY, Kang S, Park JW, Yoon KW, Kim TW, Du Halgouet C, Latifa A, Anne Sophie V, Emmanuel D, Christine R, Francois V, Grzelak T, Czyzewska-Majchrzak L, Kramkowska M, Witmanowski H, Czyzewska K, Janda K, Krzanowski M, Dumnicka P, Sulowicz W, Rroji M, Seferi S, Barbullushi M, Likaj E, Petrela E, Thereska N, Cabiddu G, Dessi E, Arceri A, Laura P, Manca E, Conti M, Cao R, Pani A, Liao CT, Vega Vega O, Mendoza de la Garza A, Correa-Rotter R, Ueda A, Nagai K, Morimoto M, Hirayama A, Owada S, Tonozuka Y, Saito C, Saito C, Yamagata K, Matsuda A, Tayama Y, Ogawa T, Iwanaga M, Noiri C, Hatano M, Kiba T, Kanozawa K, Katou H, Hasegawa H, Mitarai T, Ros-Ruiz S, Ros-Ruiz S, Fuentes-Sanchez L, Jironda-Gallegos C, Gutierrez-Vilches E, Garcia-Frias P, Hernandez-Marrero D, Kang S, Lee S, Cho K, Park J, Yoon K, Do J, Lai X, Chen W, Guo Z, Braide M, Cristina V, Popa SG, Maria M, Eugen M, Martino F, DI Loreto P, DI Loreto P, Ronco C, Rroji M, Seferi S, Barbullushi M, Petrela E, Spahia N, Likaj E, Thereska N, Sanchez Macias LO, Sanchez Macias LO, Lares Castellanos KI, Hernandez Pacheco JA, Vega Vega O, Correa Rotter R, Pedro Ventura A, Olivia S, Teixeira L, Joana V, Francisco F, Maria Joao C, Antonio C, Rodrigues AS, Atas N, Erten Y, Erten Y, Onec K, Inal S, Topal S, Akyel A, Celik B, Okyay GU, Tavil Y, Zeiler M, Monteburini T, Agostinelli RM, Marinelli R, Santarelli S, Erten Y, Erten Y, Inal S, Onec K, Atas N, Okyay GU, Yaylaci C, Sahin G, Tavil Y, Guz G, Sindel S, Pinho A, Cabrita A, Malho Guedes A, Fragoso A, Carreira H, Pinto I, Bernardo I, Leao P, Janda K, Janda K, Krzanowski M, Kusnierz-Cabala B, Dumnicka P, Krasniak A, Chowaniec E, Tabor-Ciepiela B, Sulowicz W, Turkmen K, Ozbek O, Kayrak M, Samur C, Guler I, Tonbul HZ, Rusai K, Herzog R, Kratochwill K, Kuster L, Aufricht C, Meier CM, Fliser D, Schilling MK, Klingele M, Fukasawa M, Fukasawa M, Takeda M, Kamiyama M, Song YR, Kim HJ, Kim SG, Kim JK, Noh JW, Lee YK, Yoon JW, Koo JR. Peritoneal dialysis. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs243] [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: 11/14/2022] Open
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Nassr N, Hünnemeyer A, Herzog R, Scholpp J, Lahu G. Wirkung von weiblichen Hormonen (steady-state) auf die Pharmakokinetik von Roflumilast und Roflumilast-N-Oxid bei einer Einmalgabe. Pneumologie 2012. [DOI: 10.1055/s-0032-1302625] [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: 10/28/2022]
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Peitsmeyer P, Herzog R, Mann O, Busch P, Wolter S, Rudolph V, Klinke A, Baldus S, Rudolph T. Short-term changes in endothelial function and inflammatory status through extensive weight loss in morbid obesity after bariatic surgery. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Herzog R, Schuhmann K, Schwudke D, Sampaio JL, Bornstein SR, Schroeder M, Shevchenko A. LipidXplorer: a software for consensual cross-platform lipidomics. PLoS One 2012; 7:e29851. [PMID: 22272252 PMCID: PMC3260173 DOI: 10.1371/journal.pone.0029851] [Citation(s) in RCA: 267] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 12/05/2011] [Indexed: 01/14/2023] Open
Abstract
LipidXplorer is the open source software that supports the quantitative characterization of complex lipidomes by interpreting large datasets of shotgun mass spectra. LipidXplorer processes spectra acquired on any type of tandem mass spectrometers; it identifies and quantifies molecular species of any ionizable lipid class by considering any known or assumed molecular fragmentation pathway independently of any resource of reference mass spectra. It also supports any shotgun profiling routine, from high throughput top-down screening for molecular diagnostic and biomarker discovery to the targeted absolute quantification of low abundant lipid species. Full documentation on installation and operation of LipidXplorer, including tutorial, collection of spectra interpretation scripts, FAQ and user forum are available through the wiki site at: https://wiki.mpi-cbg.de/wiki/lipidx/index.php/Main_Page.
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Affiliation(s)
- Ronny Herzog
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
- Department of Internal Medicine III, Carl Gustav Carus Clinics of Dresden University of Technology, Dresden, Germany
| | - Kai Schuhmann
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
- Department of Internal Medicine III, Carl Gustav Carus Clinics of Dresden University of Technology, Dresden, Germany
| | - Dominik Schwudke
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India
| | - Julio L. Sampaio
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Stefan R. Bornstein
- Department of Internal Medicine III, Carl Gustav Carus Clinics of Dresden University of Technology, Dresden, Germany
| | - Michael Schroeder
- Biotechnology Centre, Dresden University of Technology, Dresden, Germany
| | - Andrej Shevchenko
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
- * E-mail:
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Schuhmann K, Almeida R, Baumert M, Herzog R, Bornstein SR, Shevchenko A. Shotgun lipidomics on a LTQ Orbitrap mass spectrometer by successive switching between acquisition polarity modes. J Mass Spectrom 2012; 47:96-104. [PMID: 22282095 DOI: 10.1002/jms.2031] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Top-down shotgun lipidomics relies on direct infusion of total lipid extracts into a high-resolution tandem mass spectrometer and implies that individual lipids are recognized by their accurately determined m/z. Lipid ionization efficiency and detection specificity strongly depend on the acquisition polarity, and therefore it is beneficial to analyze lipid mixtures in both positive and negative modes. Hybrid LTQ Orbitrap mass spectrometers are widely applied in top-down lipidomics; however, rapid polarity switching was previously unfeasible because of the severe and immediate degradation of mass accuracy. Here, we report on a method to rapidly acquire high-resolution spectra in both polarity modes with sub-ppm mass accuracy and demonstrate that it not only simplifies and accelerates shotgun lipidomics analyses but also improves the lipidome coverage because more lipid classes and more individual species within each class are recognized. In this way, shotgun analysis of total lipid extracts of human blood plasma enabled to quantify 222 species from 15 major lipid classes within 7 min acquisition cycle.
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Affiliation(s)
- Kai Schuhmann
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307, Dresden, Germany
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Abstract
Despite their compositional complexity, lipidomes comprise a large number of isobaric species that cannot be distinguished by conventional low resolution mass spectrometry and therefore in-depth MS/MS analysis was required for their accurate quantification. Here we argue that the progress in high resolution mass spectrometry is changing the concept of lipidome characterization. Because exact masses of isobaric species belonging to different lipid classes are not necessarily identical, they can now be distinguished and directly quantified in total lipid extracts. By streamlining and simplifying the molecular characterization of lipidomes, high resolution mass spectrometry has developed into a generic tool for cell biology and molecular medicine.
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Affiliation(s)
- Dominik Schwudke
- MPI of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
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Paulus C, Citak M, Durnwalder O, Herzog R, Diener U. [Two-stage traumatic rupture of the arteria ovarica after high energy trauma]. Z Orthop Unfall 2011; 149:424-7. [PMID: 21780022 DOI: 10.1055/s-0030-1271195] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Rupture of the Arteria ovarica is a rare but life-threatening injury and occurs primarily in pregnancy. Most previously described ruptures of the Arteria ovarica were in the early postpartum period and in women who were older than 45 years. We report on a two-stage rupture of the Arteria ovarica after a high energy trauma, which has not previously been described in the literature. PATIENT AND METHOD A 66-year-old female patient was admitted to the emergency room after a car accident. Initial treatment was performed in a regional hospital. Initial clinical and radiological examinations were without any pathologies and the patient was discharged home after ambulatory treatment. Six days later, the patient was referred to our hospital because of increasing headache. A computed tomography of the head showed a subdural haematoma. A follow-up CT scan after three days showed no further progression of the haematoma. RESULTS AND CONCLUSIONS During the hospital stay, the patient developed abdominal pain, nausea and cardiovascular decompensation. An ultrasound of the abdomen showed free fluids, while a performed CT scan of the abdomen confirmed an arterial bleeding from a pseudoaneurysm of the left ovarian artery. An emergency operation was performed. Postoperative management included ICU monitoring, diuresis control and blood transfusion. The patient was discharged home after 19 days in a good condition. The indication for performing a CT scan and primary hospitalisation after a high energy trauma should be applied generously.
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Affiliation(s)
- C Paulus
- Klinik für Orthopädie und Unfallchirurgie, St. Elisabeth Klinik Saarlouis, Kapuzinerstraße 4, Saarlouis.
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Fernandez C, Schuhmann K, Herzog R, Fielding B, Frayn K, Shevchenko A, James P, Holm C, Ström K. Altered desaturation and elongation of fatty acids in hormone-sensitive lipase null mice. PLoS One 2011; 6:e21603. [PMID: 21738729 PMCID: PMC3126817 DOI: 10.1371/journal.pone.0021603] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 06/03/2011] [Indexed: 01/10/2023] Open
Abstract
Background Hormone-sensitive lipase (HSL) is expressed predominantly in adipose tissue, where it plays an important role in catecholamine-stimulated hydrolysis of stored lipids, thus mobilizing fatty acids. HSL exhibits broad substrate specificity and besides acylglycerides it hydrolyzes cholesteryl esters, retinyl esters and lipoidal esters. Despite its role in fatty acid mobilization, HSL null mice have been shown to be resistant to diet-induced obesity. The aim of this study was to define lipid profiles in plasma, white adipose tissue (WAT) and liver of HSL null mice, in order to better understand the role of this multifunctional enzyme. Methodology/Principal Findings This study used global and targeted lipidomics and expression profiling to reveal changed lipid profiles in WAT, liver and plasma as well as altered expression of desaturases and elongases in WAT and liver of HSL null mice on high fat diet. Decreased mRNA levels of stearoyl-CoA desaturase 1 and 2 in WAT were consistent with a lowered ratio of 16∶1n7/16∶0 and 18∶1n9/18∶0 in WAT and plasma. In WAT, increased ratio of 18∶0/16∶0 could be linked to elevated mRNA levels of the Elovl1 elongase. Conclusions This study illustrates the importance of HSL for normal lipid metabolism in response to a high fat diet. HSL deficiency greatly influences the expression of elongases and desaturases, resulting in altered lipid profiles in WAT, liver and plasma. Finally, altered proportions of palmitoleate, a recently-suggested lipokine, in tissue and plasma of HSL null mice, could be an important factor mediating and contributing to the changed lipid profile, and possibly also to the decreased insulin sensitivity seen in HSL null mice.
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Affiliation(s)
- Céline Fernandez
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Kai Schuhmann
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Ronny Herzog
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Barbara Fielding
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, United Kingdom
| | - Keith Frayn
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, United Kingdom
| | - Andrej Shevchenko
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Peter James
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - Cecilia Holm
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Kristoffer Ström
- Department of Experimental Medical Science, Lund University, Lund, Sweden
- * E-mail:
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Schuhmann K, Herzog R, Schwudke D, Metelmann-Strupat W, Bornstein SR, Shevchenko A. Bottom-Up Shotgun Lipidomics by Higher Energy Collisional Dissociation on LTQ Orbitrap Mass Spectrometers. Anal Chem 2011; 83:5480-7. [DOI: 10.1021/ac102505f] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kai Schuhmann
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
- Department of Internal Medicine III, Technical University of Dresden, 01307 Dresden, Germany
| | - Ronny Herzog
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
- Department of Internal Medicine III, Technical University of Dresden, 01307 Dresden, Germany
| | - Dominik Schwudke
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK, Bellary Road, Bangalore 560065, India
| | | | - Stefan R. Bornstein
- Department of Internal Medicine III, Technical University of Dresden, 01307 Dresden, Germany
| | - Andrej Shevchenko
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
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Lichtenauer AM, Kratochwill K, Böhm MH, Herzog R, Aufricht C. In-vivo Proteomics Analyse der mesothelialen Stressantwort in der experimentellen Peritonealdialyse. Klin Padiatr 2011. [DOI: 10.1055/s-0031-1273847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Herzog R, Kratochwill K, Aufricht C. Einfluss von Peritonealdialyseflüssigkeiten auf die Protein-Glykosylierung von humanen Mesothelzellen. Klin Padiatr 2011. [DOI: 10.1055/s-0031-1273845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rusai K, Herzog R, Kuster L, Kratochwill K, Aufricht C. Inadäquate Hitzeschockprotein Antwort in Mesothelzellen nach PD Behandlung. Klin Padiatr 2011. [DOI: 10.1055/s-0031-1273844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Herzog R, Schwudke D, Schuhmann K, Sampaio JL, Bornstein SR, Schroeder M, Shevchenko A. A novel informatics concept for high-throughput shotgun lipidomics based on the molecular fragmentation query language. Genome Biol 2011; 12:R8. [PMID: 21247462 PMCID: PMC3091306 DOI: 10.1186/gb-2011-12-1-r8] [Citation(s) in RCA: 278] [Impact Index Per Article: 21.4] [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: 07/26/2010] [Revised: 01/04/2011] [Accepted: 01/19/2011] [Indexed: 01/27/2023] Open
Abstract
Shotgun lipidome profiling relies on direct mass spectrometric analysis of total lipid extracts from cells, tissues or organisms and is a powerful tool to elucidate the molecular composition of lipidomes. We present a novel informatics concept of the molecular fragmentation query language implemented within the LipidXplorer open source software kit that supports accurate quantification of individual species of any ionizable lipid class in shotgun spectra acquired on any mass spectrometry platform.
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Affiliation(s)
- Ronny Herzog
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
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Pali-Schöll I, Herzog R, Wallmann J, Szalai K, Brunner R, Lukschal A, Karagiannis P, Diesner SC, Jensen-Jarolim E. Antacids and dietary supplements with an influence on the gastric pH increase the risk for food sensitization. Clin Exp Allergy 2010; 40:1091-8. [PMID: 20214670 DOI: 10.1111/j.1365-2222.2010.03468.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Elevation of the gastric pH increases the risk for sensitization against food allergens by hindering protein breakdown. This can be caused by acid-suppressing medication like sucralphate, H2-receptor blockers and proton pump inhibitors, as shown in recent murine experimental and human observational studies. OBJECTIVE The aim of the present study was to assess the sensitization capacity of the dietary supplement base powder and of over-the-counter antacids. METHODS Changes of the pH as well as of protein digestion due to base powder or antacids were measured in vitro. To examine the in vivo influence, BALB/c mice were fed codfish extract with one of the acid-suppressing substances. Read-out of antibody levels in the sera, of cytokine levels of stimulated splenocytes and of intradermal skin tests was performed. RESULTS The pH of hydrochloric acid was substantially increased in vitro by base powder as well as antacids in a time- and dose-dependent manner. This elevation hindered the digestion of codfish proteins in vitro. A significant increase in codfish-specific IgE antibodies was found in the groups fed codfish combined with Rennie Antacidum or with base powder; the latter also showed significantly elevated IgG1 and IgG2a levels. The induction of an anaphylactic immune response was proven by positive results in intradermal skin tests. CONCLUSIONS Antacids and dietary supplements influencing the gastric pH increase the risk for sensitization against allergenic food proteins. As these substances are commonly used in the general population without consulting a physician, our data may have a major practical and clinical impact.
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Affiliation(s)
- I Pali-Schöll
- IPP-Department of Pathophysiology, Centre of Physiology, Pathophysiology and Immunology, Medical University of Vienna, Vienna, Austria.
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Graessler J, Schwudke D, Schwarz PEH, Herzog R, Shevchenko A, Bornstein SR. Top-down lipidomics reveals ether lipid deficiency in blood plasma of hypertensive patients. PLoS One 2009; 4:e6261. [PMID: 19603071 PMCID: PMC2705678 DOI: 10.1371/journal.pone.0006261] [Citation(s) in RCA: 255] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2009] [Accepted: 06/18/2009] [Indexed: 01/11/2023] Open
Abstract
Background Dyslipoproteinemia, obesity and insulin resistance are integrative constituents of the metabolic syndrome and are major risk factors for hypertension. The objective of this study was to determine whether hypertension specifically affects the plasma lipidome independently and differently from the effects induced by obesity and insulin resistance. Methodology/Principal Findings We screened the plasma lipidome of 19 men with hypertension and 51 normotensive male controls by top-down shotgun profiling on a LTQ Orbitrap hybrid mass spectrometer. The analysis encompassed 95 lipid species of 10 major lipid classes. Obesity resulted in generally higher lipid load in blood plasma, while the content of tri- and diacylglycerols increased dramatically. Insulin resistance, defined by HOMA-IR >3.5 and controlled for BMI, had little effect on the plasma lipidome. Importantly, we observed that in blood plasma of hypertensive individuals the overall content of ether lipids decreased. Ether phosphatidylcholines and ether phosphatidylethanolamines, that comprise arachidonic (20∶4) and docosapentaenoic (22∶5) fatty acid moieties, were specifically diminished. The content of free cholesterol also decreased, although conventional clinical lipid homeostasis indices remained unaffected. Conclusions/Significance Top-down shotgun lipidomics demonstrated that hypertension is accompanied by specific reduction of the content of ether lipids and free cholesterol that occurred independently of lipidomic alterations induced by obesity and insulin resistance. These results may form the basis for novel preventive and dietary strategies alleviating the severity of hypertension.
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Affiliation(s)
- Juergen Graessler
- Department of Internal Medicine III, Carl Gustav Carus Medical School, Technical University Dresden, Dresden, Germany
| | - Dominik Schwudke
- Max Planck Institute of Molecular (MPI) of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Peter E. H. Schwarz
- Department of Internal Medicine III, Carl Gustav Carus Medical School, Technical University Dresden, Dresden, Germany
| | - Ronny Herzog
- Department of Internal Medicine III, Carl Gustav Carus Medical School, Technical University Dresden, Dresden, Germany
- Max Planck Institute of Molecular (MPI) of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Andrej Shevchenko
- Max Planck Institute of Molecular (MPI) of Molecular Cell Biology and Genetics, Dresden, Germany
- * E-mail: (AS); (SRB)
| | - Stefan R. Bornstein
- Department of Internal Medicine III, Carl Gustav Carus Medical School, Technical University Dresden, Dresden, Germany
- * E-mail: (AS); (SRB)
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Gagliardo C, Herzog R, Bostwick S, Lighvani S. Hypereosinophilia in Two Patients with Ventriculoperitoneal Shunts. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.966] [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: 11/28/2022]
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Gehring C, Herzog R, Nuri M. Urethraplastik zum Ersatz der hinteren weiblichen Harnröhre. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1060508] [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: 10/21/2022]
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33
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Petrilowitsch N, Herzog R. Komplementäre Neurolepsie. Eur Neurol 2008. [DOI: 10.1159/000127299] [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: 11/19/2022]
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Stüssi unter Mitarbeit E, Bischof HJ, Lucchinetti E, Herzog R, Gerber H, Kramers I, Stalder H, Kriemler S, Casez JP, Jäger P. Entwicklung und Anpassung der Biegefestigkeit des Extremitätenskelettes durch Training am Beispiel der Tibia. Sportverletz Sportschaden 2008. [DOI: 10.1055/s-2007-993461] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Schwudke D, Liebisch G, Herzog R, Schmitz G, Shevchenko A. Shotgun Lipidomics by Tandem Mass Spectrometry under Data‐Dependent Acquisition Control. Methods Enzymol 2007; 433:175-91. [DOI: 10.1016/s0076-6879(07)33010-3] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Nave R, Schmidt B, Hummel RP, Wohlsen A, Herzog R, Zech K. Aktivierung von Ciclesonid und Bildung lipophiler Fettsäure-Konjugate in vitro in der Rattenlunge. Pneumologie 2005. [DOI: 10.1055/s-2005-864241] [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: 10/19/2022]
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38
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Monmayrant A, Joffre M, Oksenhendler T, Herzog R, Kaplan D, Tournois P. Time-domain interferometry for direct electric-field reconstruction by use of an acousto-optic programmable filter and a two-photon detector. Opt Lett 2003; 28:278-280. [PMID: 12661528 DOI: 10.1364/ol.28.000278] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We introduce a new approach to the characterization of femtosecond optical pulses based on a remarkably simple setup combining a two-photon detector and a pulse shaper consisting of a longitudinal acousto-optic programmable filter. The operation of this setup is demonstrated through the use of a new version of spectral phase interferometry for direct electric-field reconstruction based on time-domain instead of on frequency-domain interferometry.
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Affiliation(s)
- A Monmayrant
- Laboratoire d'Optique et Biosciences, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7645, Cedex, France
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Abstract
A newly developed cryoprobe for peripheral nerves allows surgeons to freeze branches of the trigeminal nerve at the infraorbital or the mandibular foramen without exposing the nerve or damaging the surrounding tissue. The probe has an outer diameter of 2.7mm, and a vacuum-insulated shaft to protect the adjacent tissue. It is designed to be inserted transmucosally. The cryoprobe was used in 19 patients to freeze the infraorbital nerve or the inferior alveolar nerve. At 4-8 months after cryotherapy sensation in the areas innervated by the treated nerve had returned, but pain was absent for at least 6 months. The pain recurred in 13 out of 19 patients within 6-12 months. However, it was possible to repeat the cryotherapy as the procedure was not stressful. Cryosurgery widens the range of methods available to treat trigeminal neuralgia.
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Affiliation(s)
- W Pradel
- Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus, Dresden, Germany.
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Meier C, Staub JJ, Roth CB, Guglielmetti M, Kunz M, Miserez AR, Drewe J, Huber P, Herzog R, Müller B. TSH-controlled L-thyroxine therapy reduces cholesterol levels and clinical symptoms in subclinical hypothyroidism: a double blind, placebo-controlled trial (Basel Thyroid Study). J Clin Endocrinol Metab 2001; 86:4860-6. [PMID: 11600554 DOI: 10.1210/jcem.86.10.7973] [Citation(s) in RCA: 198] [Impact Index Per Article: 8.6] [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: 11/19/2022]
Abstract
This study evaluated the effect of physiological, TSH-guided, L-thyroxine treatment on serum lipids and clinical symptoms in patients with subclinical hypothyroidism. Sixty-six women with proven subclinical hypothyroidism (TSH, 11.7 +/- 0.8 mIU/liter) were randomly assigned to receive L-thyroxine or placebo for 48 wk. Individual L-thyroxine replacement (mean dose, 85.5 +/- 4.3 microg/d) was performed based on blinded TSH monitoring, resulting in euthyroid TSH levels (3.1 +/- 0.3 mIU/liter). Lipid concentrations and clinical scores were measured before and after treatment. Sixty-three of 66 patients completed the study. In the L-thyroxine group (n = 31) total cholesterol and low density lipoprotein cholesterol were significantly reduced [-0.24 mmol/liter, 3.8% (P = 0.015) and -0.33 mmol/liter, 8.2% (P = 0.004), respectively]. Low density lipoprotein cholesterol decrease was more pronounced in patients with TSH levels greater than 12 mIU/liter or elevated low density lipoprotein cholesterol levels at baseline. A significant decrease in apolipoprotein B-100 concentrations was observed (P = 0.037), whereas high density lipoprotein cholesterol, triglycerides, apolipoprotein AI, and lipoprotein(a) levels remained unchanged. Two clinical scores assessing symptoms and signs of hypothyroidism (Billewicz and Zulewski scores) improved significantly (P = 0.02). This is the first double blind study to show that physiological L-thyroxine replacement in patients with subclinical hypothyroidism has a beneficial effect on low density lipoprotein cholesterol levels and clinical symptoms of hypothyroidism. An important risk reduction of cardiovascular mortality of 9-31% can be estimated from the observed improvement in low density lipoprotein cholesterol.
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Affiliation(s)
- C Meier
- Division of Endocrinology, Department of Central Laboratories, University Hospital Basel, Petersgraben 4, CH-4031 Basel, Switzerland.
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Abstract
This study examined the demographic, medical, and psychiatric correlates of hallucinations and paranoid delusions reported by proxy informants for 822 elders aged 70 or older. This sample comprised people who were deemed unable to complete a direct interview in a large nationwide study of aging. Marital status, trouble with vision, and cognitive impairment were associated with report of both paranoid delusions and hallucinations. Depressive symptoms and stroke were associated with hallucinations only. These results suggest that inadequate external stimulation in the elderly leads to psychotic experiences.
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Affiliation(s)
- C L Turvey
- Department of Psychiatry University of Iowa, Iowa City, 52242-1000, USA.
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Abstract
STUDY DESIGN A retrospective chart review. OBJECTIVES To report the correlation between the side of a concordantly painful, post-discography computer tomography (CT) visualized, annular tear, and the side of a patients' low back pain. SUMMARY OF BACKGROUND DATA An annular fissure extending from the nucleus to the outer one-third of the annulus is thought to be the nociceptive source stimulated during provocative lumbar discography. To our knowledge, there are no studies that have attempted to delineate whether the side of the annular tear correlates with the side of the patient pain. METHODS One hundred and one post-discography CT scans, performed on patients with single level, concordantly painful, and fissured discs identified during lumbar discography, were randomly obtained from the archived and current files of the Penn Spine Center's film library. These were reviewed by both the lead author and a spine radiologist, both of who were blinded to the side of the patients pain, to determine which scans demonstrated clearly definable tears extending to the outer one-third of the annulus. Statistical analysis via the exact method was used to determine the correlation between the side of the patients tear and the side of the patients pain. RESULTS Forty post-discography CT scans met the inclusion criteria. There was a random correlation between the side of the patients concordantly painful annular tear and the side of the patients pain. CONCLUSIONS The results of this study raise several questions regarding the embryologic development of the intervertebral disc and its somite, neurologic transmission of discogenic pain, distribution of chemical inflammagens, validity of discography, technique of ESI, and technique and validity of IDET.
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Affiliation(s)
- C W Slipman
- Department of Orthopaedic Disorders, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA
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Barth C, Diening U, Stachowski J, Jacob S, Herzog R, Baldamus CA. Survival- and apoptosis-inducing genes of the BCL-2 gene family expressed in urine lymphocytes to monitor renal transplant function. Transplant Proc 2001; 33:255. [PMID: 11266806 DOI: 10.1016/s0041-1345(00)02002-9] [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: 11/23/2022]
Affiliation(s)
- C Barth
- Klinik IV für Innere Medizin, University Hospital Cologne, Köln, Germany.
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McCarthy I, Goodship A, Herzog R, Oganov V, Stussi E, Vahlensieck M. Investigation of bone changes in microgravity during long and short duration space flight: comparison of techniques. Eur J Clin Invest 2000; 30:1044-54. [PMID: 11122319 DOI: 10.1046/j.1365-2362.2000.00719.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [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: 11/20/2022]
Abstract
BACKGROUND Loss of bone mass is a continuing problem in long-term space flight. Although counter-measure programmes have been developed, effective assessment of these programmes is hampered by a lack of monitoring techniques that can be used in-flight. MATERIALS AND METHODS Three techniques were used to evaluate changes in bone during two missions of 180 and 20 days to the MIR space station, involving three subjects. Dual energy X-ray absorptiometry (DXA) was used before and after flight to measure whole body and regional bone mineral density (BMD). Ultrasonic measurements of velocity (SOS) and broadband attenuation (BUA) of the calcaneus were measured during the 180 day mission and before and after the 20 day mission. Phase velocity of flexural waves in the tibia was also measured on the same days as the ultrasonic measurements of the calcaneus. RESULTS DXA measurements demonstrated significant variation between different sites in the body for changes in BMD, with the greatest changes occurring in the lumbar spine and proximal femur. There was a trend for increasing phase velocity in the tibia during the 180 mission, but this was not significant. BUA and SOS measurements of the calcaneus showed consistent but divergent patterns of changes during the mission. CONCLUSION Although in-flight measurements of bone using ultrasound or phase velocity may provide information on the kinetics of bone loss in space flight, the heterogeneity of response in the skeleton means that it is difficult to predict overall bone loss from measurements at one particular site.
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Abstract
OBJECTIVES The ability of older people to estimate their own memory, often referred to as "metamemory," has been evaluated in previous studies with conflicting reports regarding accuracy. Some studies have suggested that an older person's metamemory is mostly accurate, whereas others have demonstrated little relationship between memory complaint and actual impairment. This study examines memory complaint in a large national sample of older people aged > or = 70. DESIGN A longitudinal cohort study with two waves of data collection spaced 2 years apart. SETTING A nationwide random sample of community-dwelling older persons. PARTICIPANTS A total of 5,444 community-dwelling persons aged > or = 70 and their spouses. MEASUREMENTS Participants were asked if they believed their memory was excellent, very good, good, fair, or poor. They were then administered a cognitive assessment derived from the Mini-Mental Status Exam. RESULTS In general, people's assessment of their memory corresponded with their actual performance on cognitive measures. However, large portions of the sample inaccurately assessed their memory skills. People who reported depressive symptoms and had impairment in activities of daily living were more likely to state that their memory was impaired, although they performed very well on cognitive measures. CONCLUSIONS The conditions that skew people's self-assessment are the ones most likely to bring them into contact with healthcare professionals. This may give clinicians the general impression that older people cannot assess their own cognitive skills. However, poor metamemory appears to be a characteristic of a specific subgroup of older persons, not necessarily characteristic of the general population.
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Affiliation(s)
- C L Turvey
- Department of Preventive Medicine and Environmental Health, The University of Iowa, Iowa City 52242-1000, USA
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Lee J, Brookenthal KR, Ramsey ML, Kneeland JB, Herzog R. MR imaging assessment of the pectoralis major myotendinous unit: an MR imaging-anatomic correlative study with surgical correlation. AJR Am J Roentgenol 2000; 174:1371-5. [PMID: 10789797 DOI: 10.2214/ajr.174.5.1741371] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE MR imaging is the optimal imaging technique to study the normal and abnormal conditions of the pectoralis major muscle and tendon unit. The purpose of this study was to use MR imaging to provide an anatomic survey of the normal pectoralis major tendon and its insertion and to compare these findings with surgically proven cases of rupture. CONCLUSION MR imaging shows the normal pectoralis major myotendinous unit has low signal intensity on both T1- and T2-weighted images. Reliable anatomic landmarks for visualization and examination of injuries to the muscle and myotendinous unit include the quadrilateral space, or the origin of the lateral head of the triceps, as the superior boundary and the deltoid tuberosity as the inferior boundary of the intact tendon of insertion. Failure to visualize a normal insertion within these boundaries should prompt a dedicated search by the radiologist for rupture and retraction of the tendon medially.
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Affiliation(s)
- J Lee
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104, USA
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47
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Crenshaw S, Herzog R, Castagno P, Richards J, Miller F, Michaloski G, Moran E. The efficacy of tone-reducing features in orthotics on the gait of children with spastic diplegic cerebral palsy. J Pediatr Orthop 2000; 20:210-6. [PMID: 10739284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This study analyzed the effects of tone-reducing features in ankle-foot orthotics (AFOs) on the gait of eight children (ages 4-11 years) with spastic diplegic cerebral palsy. A standard gait analysis was performed on each subject in each of three trial orthotics and in a baseline shoes-only condition. A 4-week accommodation period was allotted for each of the three devices: a standard hinged AFO, an AFO with tone-reducing features, and a supramalleolar orthotic with tone-reducing features. Most significant differences were at the ankle, between free-ankle and plantar flexion-limiting conditions. No significant functional changes in gait were evident with the addition of tone-reducing properties to a standard articulating AFO.
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Affiliation(s)
- S Crenshaw
- Alfred I. duPont Hospital for Children, Wilmington, Delaware 19899, USA
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48
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de Bruin ED, Herzog R, Rozendal RH, Michel D, Stüssi E. Estimation of geometric properties of cortical bone in spinal cord injury. Arch Phys Med Rehabil 2000; 81:150-6. [PMID: 10668767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
OBJECTIVE To evaluate structural and geometrical properties of the tibia shaft in subjects with spinal cord injury (SCI) and subjects without SCI and to estimate the potential usefulness of a multimodal approach to diagnosing osteoporosis in SCI. DESIGN A cross-sectional study of randomly selected SCI and non-SCI subjects. METHODS Measurements of bone geometric indices by computed tomography, and calculated bending stiffness with a biomechanical testing method. SETTING An SCI center hospital. SUBJECTS Ten men without known orthopedic or neurologic impairments (controls), 10 men with SCI who had a history of lower extremity pathologic fracture since SCI, and 10 men with SCI who had never had lower extremity pathologic fracture. RESULTS Analysis of geometric and structural indices of subjects' tibias found a significant difference in all geometric indices between controls and the SCI subjects with pathologic fracture history. Between the controls and the SCI subjects with no fracture history, however, differences were found only in cross-sectional area and calculated bending stiffness. CONCLUSION Structural analysis of leg bone, combined with measurement of bone density, may improve the ability to assess fracture risk in patients with SCI.
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Affiliation(s)
- E D de Bruin
- Department of Material Sciences, Swiss Federal Institute of Technology, Zurich
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49
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Abstract
OBJECTIVE The goal of this study was to describe the association between conjugal loss and both syndromal depression and depressive symptoms in a prospective cohort study of people aged 70 years or older. METHOD A measure of syndromal depression, the shortform Composite International Diagnostic Interview (CIDI), and a revised version of the Center for Epidemiologic Studies--Depression Scale (CES-D Scale) were administered to a group of 5,449 elders in a longitudinal cohort study. The authors compared the rates of syndromal depression (CIDI diagnosis) and depressive symptoms (six CES-D Scale symptoms) in married participants and those who lost spouses between the first and second waves of assessment. RESULTS The rate of syndromal depression in the newly bereaved was nearly nine times as high as the rate for married individuals, and the rate of depressive symptoms was nearly four times as high. The percentage of the bereaved respondents who had scores above threshold on the revised CES-D Scale was higher for those interviewed up to 2 years after loss of a spouse than for married respondents. Age, sex, prior psychiatric history, and the expectedness of the death did not differ between depressed and nondepressed newly bereaved subjects. CONCLUSIONS Recent bereavement is a significant risk factor for syndromal depression in the elderly. Some widows and widowers experienced high levels of depressive symptoms up to 2 years after the loss of their spouses. Neither demographic variables nor variables concerning the nature of the spouse's death predicted bereavement-related depression.
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Affiliation(s)
- C L Turvey
- Department of Preventive Medicine and Environmental Health, College of Medicine, University of Iowa, Iowa City 52242-1000, USA.
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50
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Abstract
Low back pain with pain radiating to the lower extremities is common in patients referred to a spine center. Lumbar spine pathology is commonly the etiology of such symptoms, but extraspinal causes of back and leg pain can manifest as a radicular disorder. Extraspinal etiologies must be considered in the workup of back and leg pain. This report describes an unusual case of spontaneously occurring bilateral femoral neck stress fractures presenting as low back pain with seemingly bilateral L4 radicular symptoms.
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Affiliation(s)
- C W Slipman
- Department of Rehabilitation Medicine, Hospital of the University of Pennsylvania, Philadelphia 19104, USA
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