1
|
Salibi E, Peter B, Schwille P, Mutschler H. Periodic temperature changes drive the proliferation of self-replicating RNAs in vesicle populations. Nat Commun 2023; 14:1222. [PMID: 36869058 PMCID: PMC9984477 DOI: 10.1038/s41467-023-36940-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
Growth and division of biological cells are based on the complex orchestration of spatiotemporally controlled reactions driven by highly evolved proteins. In contrast, it remains unknown how their primordial predecessors could achieve a stable inheritance of cytosolic components before the advent of translation. An attractive scenario assumes that periodic changes of environmental conditions acted as pacemakers for the proliferation of early protocells. Using catalytic RNA (ribozymes) as models for primitive biocatalytic molecules, we demonstrate that the repeated freezing and thawing of aqueous solutions enables the assembly of active ribozymes from inactive precursors encapsulated in separate lipid vesicle populations. Furthermore, we show that encapsulated ribozyme replicators can overcome freezing-induced content loss and successive dilution by freeze-thaw driven propagation in feedstock vesicles. Thus, cyclic freezing and melting of aqueous solvents - a plausible physicochemical driver likely present on early Earth - provides a simple scenario that uncouples compartment growth and division from RNA self-replication, while maintaining the propagation of these replicators inside new vesicle populations.
Collapse
Affiliation(s)
- Elia Salibi
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany
| | - Benedikt Peter
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany
| | - Petra Schwille
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany.
| | - Hannes Mutschler
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany.
| |
Collapse
|
2
|
Peter B, Levrier A, Schwille P. Spatiotemporal Propagation of a Minimal Catalytic RNA Network in GUV Protocells by Temperature Cycling and Phase Separation. Angew Chem Int Ed Engl 2023; 62:e202218507. [PMID: 36757674 DOI: 10.1002/anie.202218507] [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: 12/14/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/10/2023]
Abstract
Compartmentalization is key to many cellular processes and a critical bottleneck of any minimal life approach. In cells, a complex chemistry is responsible for bringing together or separating biomolecules at the right place at the right time. Lipids, nucleic acids and proteins self-organize, thereby creating boundaries, interfaces and specialized microenvironments. Exploiting reversible RNA-based liquid-liquid phase separation (LLPS) inside giant unilamellar vesicles (GUVs), we present an efficient system capable of propagating an RNA-based enzymatic reaction across a population of GUVs upon freezing-thawing (FT) temperature cycles. We report that compartmentalization in the condensed RNA-rich phase can accelerate such an enzymatic reaction. In the decondensed state, RNA substrates become homogeneously dispersed, enabling content exchange between vesicles during freeze-thawing. This work explores how a minimal reversible phase separation system in lipid vesicles could help to implement spatiotemporal control in cyclic processes, as required for minimal cells.
Collapse
Affiliation(s)
- Benedikt Peter
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany
| | - Antoine Levrier
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany
| | - Petra Schwille
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany
| |
Collapse
|
3
|
Peter B, Levrier A, Schwille P. Spatiotemporal Propagation of a Minimal Catalytic RNA Network in GUV Protocells by Temperature Cycling and Phase Separation. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202218507] [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: 02/11/2023]
Affiliation(s)
- Benedikt Peter
- Max-Planck-Institute of Biochemistry: Max-Planck-Institut fur Biochemie Cellular and Molecular Biophysics GERMANY
| | - Antoine Levrier
- Max-Planck-Institute of Biochemistry: Max-Planck-Institut fur Biochemie Cellular and Molecular Biophysics GERMANY
| | - Petra Schwille
- Max-Planck-Institute of Biochemistry: Max-Planck-Institut fur Biochemie Dptm. of Cellular and Molecular Biophysics Am Klopferspitz 18 82152 Martinsried GERMANY
| |
Collapse
|
4
|
Hufnagel M, Jost M, Peter B, Beekhuijzen M, Kreiling R. P21-07 How to elucidate the cause of postnatal effects: differentiation of intrauterine and lactation-based exposure – an exemplary cross-foster study. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
5
|
Kanyo N, Kovács K, Kovács S, Béres B, Peter B, Székács I, Horvath R. Single-cell adhesivity distribution of glycocalyx digested cancer cells from high spatial resolution label-free biosensor measurements. Matrix Biol Plus 2022; 14:100103. [PMID: 35243300 PMCID: PMC8857652 DOI: 10.1016/j.mbplus.2022.100103] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/26/2022] [Accepted: 01/30/2022] [Indexed: 12/01/2022] Open
Abstract
A high spatial resolution label-free biosensor monitors the adhesivity of cancer cells. Chondroitinase ABC was added to the adhering cells to digest their glycocalyx. Population level distributions of single-cell adhesivity were first recorded and analyzed. At relatively low and high concentration subpopulations were identified. The found subpopulations have remarkably large and weak adhesivities.
The glycocalyx is a cell surface sugar layer of most cell types that greatly influences the interaction of cells with their environment. Its components are glycolipids, glycoproteins, and oligosaccharides. Interestingly, cancer cells have a thicker glycocalyx layer compared to healthy cells, but to date, there has been no consensus in the literature on the exact role of cell surface polysaccharides and their derivatives in cellular adhesion and signaling. In our previous work we discovered that specific glycocalyx components of cancer cells regulate the kinetics and strength of adhesion on RGD (arginine-glycine-aspartic acid) peptide-coated surfaces [1]. Depending on the employed enzyme concentration digesting specific components both adhesion strengthening and weakening could be observed by monitoring the averaged behavior of thousands of cells. The enzyme chondroitinase ABC (ChrABC) was used to digest the chondroitin-4-sulfate, chondroitin-6-sulfate, and dermatan sulfate components in the glycocalyx of cancer cells. In the present work, a high spatial resolution label-free optical biosensor was employed to monitor the adhesivity of cancer cells both at the single-cell and population level. Population-level distributions of single-cell adhesivity were first recorded and analyzed when ChrABC was added to the adhering cells. At relatively low and high ChrABC concentrations subpopulations with remarkably large and weak adhesivity were identified. The changes in the adhesivity distribution due to the enzyme treatment were analyzed and the subpopulations most affected by the enzyme treatment were highlighted. The presented results open up new directions in glycocalyx related cell adhesion research and in the development of more meaningful targeted cancer treatments affecting adhesion.
Collapse
Affiliation(s)
- N. Kanyo
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - K.D. Kovács
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
- ELTE Eötvös Loránd University, Department of Biological Physics, Budapest, Hungary
| | - S.V. Kovács
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - B. Béres
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - B. Peter
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - I. Székács
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - R. Horvath
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
- Corresponding author.
| |
Collapse
|
6
|
Preiner M, Asche S, Becker S, Betts HC, Boniface A, Camprubi E, Chandru K, Erastova V, Garg SG, Khawaja N, Kostyrka G, Machné R, Moggioli G, Muchowska KB, Neukirchen S, Peter B, Pichlhöfer E, Radványi Á, Rossetto D, Salditt A, Schmelling NM, Sousa FL, Tria FDK, Vörös D, Xavier JC. The Future of Origin of Life Research: Bridging Decades-Old Divisions. Life (Basel) 2020; 10:E20. [PMID: 32110893 PMCID: PMC7151616 DOI: 10.3390/life10030020] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/19/2020] [Accepted: 02/21/2020] [Indexed: 12/12/2022] Open
Abstract
Research on the origin of life is highly heterogeneous. After a peculiar historical development, it still includes strongly opposed views which potentially hinder progress. In the 1st Interdisciplinary Origin of Life Meeting, early-career researchers gathered to explore the commonalities between theories and approaches, critical divergence points, and expectations for the future. We find that even though classical approaches and theories-e.g. bottom-up and top-down, RNA world vs. metabolism-first-have been prevalent in origin of life research, they are ceasing to be mutually exclusive and they can and should feed integrating approaches. Here we focus on pressing questions and recent developments that bridge the classical disciplines and approaches, and highlight expectations for future endeavours in origin of life research.
Collapse
Affiliation(s)
- Martina Preiner
- Institute of Molecular Evolution, University of Düsseldorf, 40225 Düsseldorf, Germany; (S.G.G.); (F.D.K.T.)
| | - Silke Asche
- School of Chemistry, University of Glasgow, Glasgow G128QQ, UK;
| | - Sidney Becker
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK;
| | - Holly C. Betts
- School of Earth Sciences, University of Bristol, Bristol BS8 1RL, UK;
| | - Adrien Boniface
- Environmental Microbial Genomics, Laboratoire Ampère, Ecole Centrale de Lyon, Université de Lyon, 69130 Ecully, France;
| | - Eloi Camprubi
- Origins Center, Department of Earth Sciences, Utrecht University, 3584 CB Utrecht, The Netherlands;
| | - Kuhan Chandru
- Space Science Center (ANGKASA), Institute of Climate Change, Level 3, Research Complex, National University of Malaysia, UKM Bangi 43600, Selangor, Malaysia;
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technicka 5, 16628 Prague 6–Dejvice, Czech Republic
| | - Valentina Erastova
- UK Centre for Astrobiology, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, UK;
| | - Sriram G. Garg
- Institute of Molecular Evolution, University of Düsseldorf, 40225 Düsseldorf, Germany; (S.G.G.); (F.D.K.T.)
| | - Nozair Khawaja
- Institut für Geologische Wissenschaften, Freie Universität Berlin, 12249 Berlin, Germany;
| | | | - Rainer Machné
- Institute of Synthetic Microbiology, University of Düsseldorf, 40225 Düsseldorf, Germany; (R.M.); (N.M.S.)
- Quantitative and Theoretical Biology, University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Giacomo Moggioli
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4DQ, UK;
| | - Kamila B. Muchowska
- Université de Strasbourg, CNRS, ISIS, 8 allée Gaspard Monge, 67000 Strasbourg, France;
| | - Sinje Neukirchen
- Archaea Biology and Ecogenomics Division, University of Vienna, 1090 Vienna, Austria; (S.N.); (E.P.); (F.L.S.)
| | - Benedikt Peter
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany;
| | - Edith Pichlhöfer
- Archaea Biology and Ecogenomics Division, University of Vienna, 1090 Vienna, Austria; (S.N.); (E.P.); (F.L.S.)
| | - Ádám Radványi
- Department of Plant Systematics, Ecology and Theoretical Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, 1117 Budapest, Hungary (D.V.)
- Institute of Evolution, MTA Centre for Ecological Research, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - Daniele Rossetto
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, 38123 Trento, Italy;
| | - Annalena Salditt
- Systems Biophysics, Physics Department, Ludwig-Maximilians-Universität München, 80799 Munich, Germany;
| | - Nicolas M. Schmelling
- Institute of Synthetic Microbiology, University of Düsseldorf, 40225 Düsseldorf, Germany; (R.M.); (N.M.S.)
- Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, 50674 Cologne, Germany
| | - Filipa L. Sousa
- Archaea Biology and Ecogenomics Division, University of Vienna, 1090 Vienna, Austria; (S.N.); (E.P.); (F.L.S.)
| | - Fernando D. K. Tria
- Institute of Molecular Evolution, University of Düsseldorf, 40225 Düsseldorf, Germany; (S.G.G.); (F.D.K.T.)
| | - Dániel Vörös
- Department of Plant Systematics, Ecology and Theoretical Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, 1117 Budapest, Hungary (D.V.)
- Institute of Evolution, MTA Centre for Ecological Research, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - Joana C. Xavier
- Institute of Molecular Evolution, University of Düsseldorf, 40225 Düsseldorf, Germany; (S.G.G.); (F.D.K.T.)
| |
Collapse
|
7
|
Miroslava J, Pavel S, Doris V, Peter B, Alzbeta F, Stanislav F, Pavel M. New Cryopreservation Technology of hMSCs: First Preclinical Results Using DMSO-containing Medium. Cryo Letters 2020; 41:50-56. [PMID: 33973985] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Human mesenchymal stem cells (hMSCs) have tremendous potential in regenerative medicine, making it desirable to cryopreserve and bank them to increase their access and availability. OBJECTIVE This research is part of a clinical trial performed on six patients that aimed to use advanced therapy medicinal products (ATMPs) based on hMSCs in patients undergoing repeated total hip replacement. MATERIALS AND METHODS To compare the characteristics of fresh and frozen hMSCs, we used the trypan blue exclusion test (cell viability), flow cytometry (cell viability and phenotyping), sterility determinations and the clonogenic assay of cell proliferation. RESULTS Cryopreserved hMSCs showed good quality parameters after thawing in comparison with fresh hMSCs in suspension. When using a medium containing dimethyl sulfoxide (DMSO), the viability was higher than 90% in all cases. The cell purity determined by flow cytometry was also acceptable. CONCLUSION These initial results show that the prepared cryopreserved ATMP exhibited good viability and phenotype characteristics.
Collapse
Affiliation(s)
- J Miroslava
- Tissue Bank, University Hospital Hradec Kralove; Department of Histology and Embryology, Faculty of Medicine in Hradec Kralove, Charles University, Czech Republic.
| | - S Pavel
- Orthopaedic Department, Faculty of Medicine in Hradec Kralove - Charles University and University Hospital Hradec Kralove, Czech Republic
| | - V Doris
- Department of Clinical Immunology and Allergology, Faculty of Medicine in Hradec Kralove - Charles University and University Hospital Hradec Kralove, Czech Republic
| | - B Peter
- Bioinova Ltd, Prague, Czech Republic
| | - F Alzbeta
- Faculty of Military Medicine of the University of Defence in Hradec Kralove, Czech Republic
| | - F Stanislav
- Department of Radiotherapy and Oncology, Faculty of Medicine in Hradec Kralove - Charles University and University Hospital Hradec Kralove, Czech Republic
| | - M Pavel
- Tissue Bank, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| |
Collapse
|
8
|
Jawurek M, Dröden J, Peter B, Glaubitz C, Hauser K. Lipid-induced dynamics of photoreceptors monitored by time-resolved step-scan FTIR spectroscopy. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
9
|
Rosen B, O'Leary E, Shan Y, Pat W, Peter B. Abstract P4-06-09: Addition of a remote genetic counselor to the breast specialist's team improves clinical decision-making. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-06-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: There is a shortage of trained genetic counselors (GC) and often long wait times for appointments, resulting in other specialists frequently ordering genetic testing. However, non-genetic specialists, including breast surgeons, find it difficult to stay current in genetics due to rapid advances in gene discovery, expanded panel offerings, and frequent changes to professional guidelines. We tested a novel model for hereditary cancer risk assessment where breast surgeons had “on demand” access to a remote laboratory-based genetic counselor for peer to peer consultation. In this study we sought to determine the impact this model has on breast surgeons' routinely ordering genetic testing including test identification, ordering patterns, and medical management.
Methods: An IRB approved multi-center prospective study involved 14 community-based breast cancer surgeons experienced with hereditary cancer risk assessment without a genetic counselor as part of their practice. Cases were all discussed with a remote Invitae GC to determine testing eligibility and selection. Physicians had the option to utilize remote GCs to discuss results or to refer to traditional genetic counseling services. Pre and post-test surveys were completed for each patient by the testing physician. To protect patient privacy, a unique case ID was used to link patient test data with identifying data.
Results: A total of 192 patients were evaluated with median age of 52. Risk assessment via BRCAPRO and the Hughes Risk model were performed on 98% of patients by the physicians. 65% of patients met NCCN guidelines for testing. Pathogenic mutations were found in 14% of patients. Breast surgeons changed their test selection 21% of the time after discussion with a GC. They called to discuss results in 47% of cases and medical management changes were incorporated in 15% of these cases based on discussion with a remote GC.
Conclusions: Remote GC provider support assisted physicians in facilitating customized test selection, aided in navigating challenging counseling cases, and impacted clinical management. This service may serve as a viable, effective model for 'on demand' genetic counseling support and may be a novel opportunity to expand genetic testing in a breast surgery setting.
Citation Format: Rosen B, O'Leary E, Shan Y, Pat W, Peter B. Addition of a remote genetic counselor to the breast specialist's team improves clinical decision-making [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-06-09.
Collapse
Affiliation(s)
- B Rosen
- Advocate Health; Invitae; Nashville Breast Center; Dallas Surgical Group
| | - E O'Leary
- Advocate Health; Invitae; Nashville Breast Center; Dallas Surgical Group
| | - Y Shan
- Advocate Health; Invitae; Nashville Breast Center; Dallas Surgical Group
| | - W Pat
- Advocate Health; Invitae; Nashville Breast Center; Dallas Surgical Group
| | - B Peter
- Advocate Health; Invitae; Nashville Breast Center; Dallas Surgical Group
| |
Collapse
|
10
|
Peter B, Bibi S, Eisenwort G, Wingelhofer B, Berger D, Stefanzl G, Blatt K, Herrmann H, Hadzijusufovic E, Hoermann G, Hoffmann T, Schwaab J, Jawhar M, Willmann M, Sperr WR, Zuber J, Sotlar K, Horny HP, Moriggl R, Reiter A, Arock M, Valent P. Drug-induced inhibition of phosphorylation of STAT5 overrides drug resistance in neoplastic mast cells. Leukemia 2017; 32:1016-1022. [PMID: 29249817 PMCID: PMC6037300 DOI: 10.1038/leu.2017.338] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 10/31/2017] [Accepted: 11/13/2017] [Indexed: 12/20/2022]
Abstract
Systemic mastocytosis (SM) is a mast cell (MC) neoplasm with complex pathology and a variable clinical course. In aggressive SM (ASM) and MC leukemia (MCL) responses to conventional drugs are poor and the prognosis is dismal. R763 is a multi-kinase inhibitor that blocks the activity of Aurora-kinase-A/B, ABL1, AKT and FLT3. We examined the effects of R763 on proliferation and survival of neoplastic MC. R763 produced dose-dependent inhibition of proliferation in the human MC lines HMC-1.1 (IC50 5-50 nM), HMC-1.2 (IC50 1-10 nM), ROSAKIT WT (IC50 1-10 nM), ROSAKIT D816V (IC50 50-500 nM) and MCPV-1.1 (IC50 100-1000 nM). Moreover, R763 induced growth inhibition in primary neoplastic MC in patients with ASM and MCL. Growth-inhibitory effects of R763 were accompanied by signs of apoptosis and a G2/M cell cycle arrest. R763 also inhibited phosphorylation of KIT, BTK, AKT and STAT5 in neoplastic MC. The most sensitive target appeared to be STAT5. In fact, tyrosine phosphorylation of STAT5 was inhibited by R763 at 10 nM. At this low concentration, R763 produced synergistic growth-inhibitory effects on neoplastic MC when combined with midostaurin or dasatinib. Together, R763 is a novel promising multi-kinase inhibitor that blocks STAT5 activation and thereby overrides drug-resistance in neoplastic MC.
Collapse
Affiliation(s)
- B Peter
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - S Bibi
- Laboratoire de Biologie et Pharmacologie Appliquée, CNRS UMR 8113, Ecole Normale Superieure de Cachan, Cachan, France
| | - G Eisenwort
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - B Wingelhofer
- Ludwig Boltzmann Institute for Cancer Research, Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Medical University of Vienna, Vienna, Austria
| | - D Berger
- Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - G Stefanzl
- Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - K Blatt
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - H Herrmann
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
| | - E Hadzijusufovic
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria.,Department for Companion Animals and Horses, Clinical Unit of Internal Medicine, University of Veterinary Medicine Vienna, Vienna, Austria
| | - G Hoermann
- Department of Laboratory Medicine, Medical University of Vienna, Vienna,Austria
| | - T Hoffmann
- Research Institute of Molecular Pathology (IMP), Vienna, Austria
| | - J Schwaab
- Department of Hematology and Oncology, University Medical Center Mannheim and Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - M Jawhar
- Department of Hematology and Oncology, University Medical Center Mannheim and Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - M Willmann
- Department for Companion Animals and Horses, Clinical Unit of Internal Medicine, University of Veterinary Medicine Vienna, Vienna, Austria
| | - W R Sperr
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - J Zuber
- Research Institute of Molecular Pathology (IMP), Vienna, Austria
| | - K Sotlar
- University Institute of Pathology, University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - H-P Horny
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | - R Moriggl
- Ludwig Boltzmann Institute for Cancer Research, Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Medical University of Vienna, Vienna, Austria
| | - A Reiter
- Department of Hematology and Oncology, University Medical Center Mannheim and Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - M Arock
- Laboratoire de Biologie et Pharmacologie Appliquée, CNRS UMR 8113, Ecole Normale Superieure de Cachan, Cachan, France.,Laboratory of Hematology, Pitié-Salpêtrière Hospital, Paris, France
| | - P Valent
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria
| |
Collapse
|
11
|
Valent P, Akin C, Hartmann K, George TI, Sotlar K, Peter B, Gleixner KV, Blatt K, Sperr WR, Manley PW, Hermine O, Kluin-Nelemans HC, Arock M, Horny HP, Reiter A, Gotlib J. Midostaurin: a magic bullet that blocks mast cell expansion and activation. Ann Oncol 2017; 28:2367-2376. [PMID: 28945834 PMCID: PMC7115852 DOI: 10.1093/annonc/mdx290] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Clinically relevant features in patients with systemic mastocytosis (SM) include the cosmetic burden of lesional skin, mediator-related symptoms, and organ damage resulting from mast cell (MC) infiltration in advanced forms of SM. Regardless of the SM variant, expansion of neoplastic MC in the skin and other organs is triggered by mutant forms of KIT, the most prevalent being D816V. Activation of MC with subsequent release of chemical mediators is often caused by IgE-dependent mechanisms in these patients. Midostaurin, also known as PKC412, blocks the kinase activity of wild-type KIT and KIT D816V, counteracts KIT-dependent growth of neoplastic MC, and inhibits IgE-dependent mediator secretion. Based on this activity-profile, the drug has been used for treatment of patients with advanced SM. Indeed, encouraging results have been obtained with the drug in a recent multi-center phase II trial in patients with advanced SM, with an overall response rate of 60% and a substantial decrease in the burden of neoplastic MC in various organs. Moreover, midostaurin improved the overall survival and relapse-free survival in patients with advanced SM compared with historical controls. In addition, midostaurin was found to improve mediator-related symptoms and quality of life, suggesting that the drug may also be useful in patients with indolent SM suffering from mediator-related symptoms resistant to conventional therapies or those with MC activation syndromes. Ongoing and future studies will determine the actual value of midostaurin-induced MC depletion and MC deactivation in these additional indications.
Collapse
Affiliation(s)
- P Valent
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria;; Division of Hematology & Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria;.
| | - C Akin
- Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, USA
| | - K Hartmann
- Department of Dermatology, University of Luebeck, Luebeck, Germany
| | - T I George
- Department of Pathology, University of New Mexico, Albuquerque, USA
| | - K Sotlar
- Institute of Pathology, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - B Peter
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria;; Division of Hematology & Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - K V Gleixner
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria;; Division of Hematology & Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - K Blatt
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria;; Division of Hematology & Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - W R Sperr
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria;; Division of Hematology & Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | | | - O Hermine
- Centre National de Référence des Mastocytoses, Imagine Institute Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - H C Kluin-Nelemans
- Department of Hematology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M Arock
- LBPA CNRS UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - H-P Horny
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | - A Reiter
- Department of Hematology and Oncology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - J Gotlib
- Stanford University School of Medicine/Stanford Cancer Institute, Stanford, USA
| |
Collapse
|
12
|
Lah Tomulic K, Mestrovic J, Zuvic M, Rubelj K, Peter B, Bilic Cace I, Verbic A. Neonatal risk mortality scores as predictors for health-related quality of life of infants treated in NICU: a prospective cross-sectional study. Qual Life Res 2016; 26:1361-1369. [PMID: 27848129 DOI: 10.1007/s11136-016-1457-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/11/2016] [Indexed: 11/29/2022]
Abstract
PURPOSE To determine the relationship of Apgar scores, gestational age and neonatal risk mortality scores to health-related quality of life (HRQoL) for infants at the age of 8 months treated after birth in neonatal intensive care unit (NICU). METHODS All surviving infants treated in two-third level NICUs in Rijeka, Croatia (from August 2013 to August 2014) were included in this prospective, cross-sectional study. For all neonates, the Score for Neonatal Acute Physiology (SNAP), SNAP with Perinatal Extension (SNAP-PE) and their simplified modifications (SNAP II and SNAP-PE II) were calculated. At the corrected age of 8 months, the Pediatric Quality of Life Questionnaire (PedsQL)-infant scale-was completed by parents of surviving infants. Multiple regression analysis was performed in order to assess the value of neonatal risk mortality scores, Apgar scores and gestational age as possible predictors of HRQoL, measured by questionnaire score. RESULTS A strong correlation has been found between SNAP and 5-min Apgar scores to HRQoL. A positive correlation was also found between gestational age and HRQoL. CONCLUSION SNAP and 5-min Apgar scores are important outcome indicators, can aid clinicians' and parents' decision making on the benefits and burdens of acute medical interventions and help determine quantities of medical treatment. Educated medical staff, effective and efficient medical treatment and a high quality of care which prevent adverse events in the first minute of life should be a priority in efforts to improve the future quality of life.
Collapse
Affiliation(s)
- K Lah Tomulic
- Pediatric Intensive Care Unit, Department of Pediatrics, University Hospital Rijeka, Istarska 43, 51000, Rijeka, Croatia. .,Faculty of Medicine, University of Rijeka, Brace Brancheta 20/1, 51000, Rijeka, Croatia.
| | - J Mestrovic
- Pediatric Intensive Care Unit, Department of Pediatrics, University Hospital Split, Spinciceva 1, 21000, Split, Croatia.,Faculty of Medicine, University of Split, Soltanska 2, 21000, Split, Croatia
| | - M Zuvic
- Department of Biotechnology, University of Rijeka, Radmile Matejcic 2, 51000, Rijeka, Croatia
| | - K Rubelj
- Faculty of Medicine, University of Rijeka, Brace Brancheta 20/1, 51000, Rijeka, Croatia
| | - B Peter
- Neonatal Intensive Care Unit, Department of Gynecology and Obstetrics, University Hospital Centre Rijeka, Kresimirova 42, 51000, Rijeka, Croatia
| | - I Bilic Cace
- Faculty of Medicine, University of Rijeka, Brace Brancheta 20/1, 51000, Rijeka, Croatia.,Neonatal Intensive Care Unit, Department of Gynecology and Obstetrics, University Hospital Centre Rijeka, Kresimirova 42, 51000, Rijeka, Croatia
| | - A Verbic
- Pediatric Intensive Care Unit, Department of Pediatrics, University Hospital Rijeka, Istarska 43, 51000, Rijeka, Croatia
| |
Collapse
|
13
|
Peter B, Pat W, Paul B, Jennifer B, Pellicane JV, Murray MK, Dul CL, Mislowsky AM, Nash CH, Richards PD, Lee LL, Stork-Sloots L, de Snoo F, Untch S, Gittleman M, Akbari S, Rotkis MC. Abstract P4-14-10: Pertuzumab overcomes chemotherapy/trastuzumab resistance in ER+/Her2+ tumors classified as luminal functional subtype by the 80-gene BluePrint assay in the prospective neo-adjuvant breast registry symphony trial (NBRST). Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p4-14-10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
The prospective Neo-adjuvant Breast Registry Symphony Trial (NBRST) enrolled over 1000 US patients between June 2011 and December 2014. The aim of NBRST study is to compare chemosensitivity as defined by pathological Complete Response (pCR) using the 80-gene BluePrint functional subtype profile vs. conventional IHC/FISH subtyping. Treatment was at the discretion of the physician utilizing standard NCCN regimens. Pertuzumab, a monoclonal antibody, inhibits the dimerization of HER2 with other HER receptors. Pertuzumab received US FDA approval for the neo-adjuvant treatment of HER2-positive breast cancer in September 2013. Essentially all patients with HER2 positive cancers were treated with chemotherapy + trastuzumab and after this date pertuzumab was added, creating 2 distinct groups of Her2 treated patients.
The aim of the current analysis is to compare the pCR rate of trastuzumab (H) vs trastuzumab and pertuzumab (H + P) by conventional and BluePrint functional subtype.
Methods
The current analysis includes women from the NBRST study, with histologically proven breast cancer, who received neo-adjuvant chemotherapy plus H or H + P and who provided written informed consent. Pathological assessment of Her2 was done according to ASCO CAP guidelines at the time of diagnosis. BluePrint (BP) classifies patients into Luminal, HER2 or Basal-type. pCR is defined as T0/isN0. All pCRs were verified with a de-identified copy of the surgical pathology report. Fisher's exact test was used to compare pCR rates within different subgroups.
Results
252 IHC/FISH Her2+ patients received H (166) or H + P (86). The median age was 53 (range 23-81). 8% was stage I, 68% stage II and 24% stage III. 65% were ER positive.
BP classified 55% of patients as HER2, 32% as Luminal, and 14% as Basal-type.
The pCR rates and p-values within different subgroups of clinical Her2+ patients are provided in the table below.
pCR rates and p-values within different subgroups of clinical Her2+ patients(n)H (pCR rate)H + P (pCR rate)p-valueTotal (n=252)40%59%0.005IHC/FISH Her2+/ER+ (163)30%57%0.001IHC/FISH Her2+/ER- (89)69%63%0.82BP HER2 (138)57%78%0.01BP Luminal (80)4%38%0.0002BP Basal (34)47%38%0.69
Conclusions
Addition of pertuzumab to trastuzumab significantly increased response rate in ER+/Her2+, BP HER2 and BP Luminal patients but not in ER-negative and BP Basal patients.
Pertuzumab overcame resistance to NCT/trastuzumab in a substantial proportion of the IHC/FISH Her2+/BP Luminal subgroup; indicated by a significantly increased pCR rate.
Citation Format: Peter B, Pat W, Paul B, Jennifer B, Pellicane JV, Murray MK, Dul CL, Mislowsky AM, Nash CH, Richards PD, Lee LL, Stork-Sloots L, de Snoo F, Untch S, Gittleman M, Akbari S, Rotkis MC. Pertuzumab overcomes chemotherapy/trastuzumab resistance in ER+/Her2+ tumors classified as luminal functional subtype by the 80-gene BluePrint assay in the prospective neo-adjuvant breast registry symphony trial (NBRST). [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-14-10.
Collapse
Affiliation(s)
- B Peter
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - W Pat
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - B Paul
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - B Jennifer
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - JV Pellicane
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - MK Murray
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - CL Dul
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - AM Mislowsky
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - CH Nash
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - PD Richards
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - LL Lee
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - L Stork-Sloots
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - F de Snoo
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - S Untch
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - M Gittleman
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - S Akbari
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| | - MC Rotkis
- Dallas Surgical Group, Dallas, TX, Netherlands; Nashville Breast Center, Nashville, TN; Breast & Melanoma Specialists of Charleston, Charleston, SC; The Breast Place, Charleston, SC; Virginia Breast Center, Bon Secours Cancer Institute, Richmond, VA; Akron General Hospital, Akron, OH; St. John Hospital & Medical Center, Detroit, MI; Coastal Carolina Breast Center, Murrells Inlet, SC; Northeast Georgia Medical Center, Gainesville, GA; Blue Ridge Cancer Care, Roanoke, VA; Comprehensive Cancer Center, Palm Springs, CA; Agendia Inc, Irvine, CA; Breast Care Specialists, Allentown, PA; Virginia Hospital Center, Arlington, VA; Northern Indiana Cancer Research Consortium, South Bend, IN
| |
Collapse
|
14
|
Melke J, Peter B, Habereder A, Ziegler J, Fasel C, Nefedov A, Sezen H, Wöll C, Ehrenberg H, Roth C. Metal-Support Interactions of Platinum Nanoparticles Decorated N-Doped Carbon Nanofibers for the Oxygen Reduction Reaction. ACS Appl Mater Interfaces 2016; 8:82-90. [PMID: 26673813 DOI: 10.1021/acsami.5b06225] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
N-doped carbon materials are discussed as catalyst supports for the electrochemical oxygen reduction reaction (ORR) in fuel cells. This work deals with the preparation of Pt nanoparticles (NPs) supported on N-doped carbon nanofibers (N-CNF) from a polyaniline nanofiber (PANI NF) precursor, and investigates the ORR activity of the produced materials. Initially, Pt NPs are deposited on PANI NFs. The PANI NF precursors are characterized by near-edge X-ray absorption fine structure (NEXAFS) and transmission electron microscopy (TEM) measurements. It is shown, that in the PANI NF precursor materials electrons from the Pt are being transferred toward the π-conjugated systems of the aromatic ring. This strong interaction of Pt atoms with PANI explains the high dispersion of Pt NPs on the PANI NF. Subsequently, the PANI NF precursors are carbonized at different heat-treatment conditions resulting in structurally different N-CNFs which are characterized by NEXAFS, X-ray photoelectron spectroscopy (XPS) ,and TEM measurements. It is shown that an interaction between N-groups and Pt NPs exists in all investigated N-CNFs. However, the N-CNFs differ in the composition of the N-species and the dispersion of the Pt NPs. A small mean Pt NP size with a narrow size distribution is attributed to the presence of pyrdinic N-groups in the N-CNFs, whereas, for the N-CNFs with mainly graphitic and pyrrolic N-groups, an increase in the average Pt NP size with a broad size distribution is found. The ORR activity in alkaline media investigated by Koutecky-Levich analysis of rotating disk electrode measurements showed a largely enhanced ORR activity in comparison to a conventional Pt/C catalyst.
Collapse
Affiliation(s)
- Julia Melke
- Institut für Angewandte Materialien-Energiespeichersysteme (IAM-ESS), Karlsruher Institut für Technologie (KIT) , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Physikalische und Theoretische Chemie, Freie Universität Berlin , Takustrasse 3, 14195 Berlin, Germany
| | - Benedikt Peter
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt , Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Anja Habereder
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt , Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Juergen Ziegler
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt , Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Claudia Fasel
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt , Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Alexei Nefedov
- Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT) , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Hikmet Sezen
- Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT) , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Elettra-Sincrotrone Trieste S.C.p.A. , Strada Statale 14, 34012 Basovizza, Trieste, Italy
| | - Christof Wöll
- Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT) , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Helmut Ehrenberg
- Institut für Angewandte Materialien-Energiespeichersysteme (IAM-ESS), Karlsruher Institut für Technologie (KIT) , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christina Roth
- Physikalische und Theoretische Chemie, Freie Universität Berlin , Takustrasse 3, 14195 Berlin, Germany
| |
Collapse
|
15
|
Fleischhauer J, Koslowski A, Kramer B, Zobel E, Bringmann G, Gulden KP, Ortmann T, Peter B. Messung und Berechnung der CD-Spektren der Biaryl-Alkaloide Ancistrocladein und Dioncophyllein A [1] / Detection and Calculation of the CD Spectra from the Biaryl Alkaloids Ancistrocladeine and Dioncophylleine A [1]. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1993-0204] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The circular dichroism (CD) of the biaryls ancistrocladeine and dioncophylleine A has been studied. The CNDO/S method in combination with a Boltzmann weighting o f different structures using AM 1 energies has been applied to reproduce the experimental CD spectra o f the two alkaloids with known absolute configuration at with those o f the exciton chirality method.
Collapse
Affiliation(s)
- J. Fleischhauer
- Lehr- und Forschungsgebiet Theoretische Chemie, Rheinisch-WestfälischeTechnische Hochschule, Professor-Pirlet-Straße 1, D-W-5100 Aachen
| | - A. Koslowski
- Lehr- und Forschungsgebiet Theoretische Chemie, Rheinisch-WestfälischeTechnische Hochschule, Professor-Pirlet-Straße 1, D-W-5100 Aachen
| | - B. Kramer
- Lehr- und Forschungsgebiet Theoretische Chemie, Rheinisch-WestfälischeTechnische Hochschule, Professor-Pirlet-Straße 1, D-W-5100 Aachen
| | - E. Zobel
- Lehr- und Forschungsgebiet Theoretische Chemie, Rheinisch-WestfälischeTechnische Hochschule, Professor-Pirlet-Straße 1, D-W-5100 Aachen
| | - G. Bringmann
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-W-8700 Würzburg
| | - K. P. Gulden
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-W-8700 Würzburg
| | - T. Ortmann
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-W-8700 Würzburg
| | - B. Peter
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-W-8700 Würzburg
| |
Collapse
|
16
|
Peter B, Melke J, Muench F, Ensinger W, Roth C. Stable platinum nanostructures on nitrogen-doped carbon obtained by high-temperature synthesis for use in PEMFC. J APPL ELECTROCHEM 2014. [DOI: 10.1007/s10800-014-0664-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
17
|
Hadzijusufovic E, Peter B, Herrmann H, Rülicke T, Cerny‐Reiterer S, Schuch K, Kenner L, Thaiwong T, Yuzbasiyan‐Gurkan V, Pickl WF, Willmann M, Valent P. NI-1: a novel canine mastocytoma model for studying drug resistance and IgER-dependent mast cell activation. Allergy 2012; 67:858-68. [PMID: 22583069 PMCID: PMC3401908 DOI: 10.1111/j.1398-9995.2012.02833.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [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] [Accepted: 03/27/2012] [Indexed: 12/18/2022]
Abstract
BACKGROUND Advanced mast cell (MC) disorders are characterized by uncontrolled growth of neoplastic MC in various organs, mediator-related symptoms, and a poor prognosis. Kit mutations supposedly contribute to abnormal growth and drug resistance in these patients. METHODS We established a novel canine mastocytoma cell line, NI-1, from a patient suffering from MC leukemia. RESULTS NI-1 cells were found to form mastocytoma lesions in NOD/SCID IL-2Rgamma(null) mice and to harbor several homozygous Kit mutations, including missense mutations at nucleotides 107(C→T) and 1187(A→G), a 12-bp duplication (nucleotide 1263), and a 12-bp deletion (nucleotide 1550). NI-1 cells expressed several MC differentiation antigens, including tryptase, Kit, and a functional IgE receptor. Compared to the C2 mastocytoma cell line harboring a Kit exon 11 mutation, NI-1 cells were found to be less responsive against the Kit tyrosine kinase inhibitors (TKI) masitinib and imatinib, but were even more sensitive against proliferation-inhibitory effects of the mammalian target of rapamycin (mTOR) blocker RAD001 and PI3-kinase/mTOR blocker NVP-BEZ235. The Kit-targeting multikinase inhibitors PKC412 and dasatinib were also found to override TKI resistance in NI-1 cells, and produced growth inhibition with reasonable IC(50) values (<0.1 μM). CONCLUSION NI-1 may serve as a useful tool to investigate IgE-dependent reactions and mechanisms of abnormal growth and drug resistance in neoplastic MC in advanced mastocytosis.
Collapse
Affiliation(s)
- E. Hadzijusufovic
- Department for Companion Animals and Horses Clinic for Internal Medicine and Infectious Diseases University of Veterinary Medicine Vienna Vienna Austria
- Division of Hematology & Hemostaseology Department of Internal Medicine I Medical University of Vienna Vienna Austria
- Ludwig Boltzmann Cluster Oncology Vienna Austria
| | - B. Peter
- Department for Companion Animals and Horses Clinic for Internal Medicine and Infectious Diseases University of Veterinary Medicine Vienna Vienna Austria
- Division of Hematology & Hemostaseology Department of Internal Medicine I Medical University of Vienna Vienna Austria
| | - H. Herrmann
- Ludwig Boltzmann Cluster Oncology Vienna Austria
| | - T. Rülicke
- Institute of Laboratory Animal Science University of Veterinary Medicine Vienna Vienna Austria
| | - S. Cerny‐Reiterer
- Division of Hematology & Hemostaseology Department of Internal Medicine I Medical University of Vienna Vienna Austria
| | - K. Schuch
- Institute of Immunology Medical University of Vienna Vienna Austria
| | - L. Kenner
- Clinical Institute of Pathology Medical University of Vienna Vienna Austria
- Ludwig Boltzmann Institute for Cancer Research Vienna Austria
| | - T. Thaiwong
- Comparative Medicine and Integrative Biology Program Michigan State University East Lansing MI USA
| | - V. Yuzbasiyan‐Gurkan
- Comparative Medicine and Integrative Biology Program Michigan State University East Lansing MI USA
| | - W. F. Pickl
- Institute of Immunology Medical University of Vienna Vienna Austria
| | - M. Willmann
- Department for Companion Animals and Horses Clinic for Internal Medicine and Infectious Diseases University of Veterinary Medicine Vienna Vienna Austria
| | - P. Valent
- Division of Hematology & Hemostaseology Department of Internal Medicine I Medical University of Vienna Vienna Austria
- Ludwig Boltzmann Cluster Oncology Vienna Austria
| |
Collapse
|
18
|
Herrmann H, Kneidinger M, Cerny-Reiterer S, Rulicke T, Willmann M, V. Gleixner K, Blatt K, Hormann G, Peter B, Samorapoompichit P, Pickl W, Y. Bharate G, Mayerhofer M, R. Sperr W, Maeda H, Valent P. The Hsp32 Inhibitors SMA-ZnPP and PEG-ZnPP Exert Major Growth-Inhibitory Effects on D34+/CD38+ and CD34+/CD38- AML Progenitor Cells. Curr Cancer Drug Targets 2012; 12:51-63. [DOI: 10.2174/156800912798888992] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Revised: 09/20/2011] [Accepted: 09/20/2011] [Indexed: 11/22/2022]
|
19
|
Yamada NA, Rector LS, Tsang P, Carr E, Scheffer A, Sederberg MC, Aston ME, Ach RA, Tsalenko A, Sampas N, Peter B, Bruhn L, Brothman AR. Visualization of fine-scale genomic structure by oligonucleotide-based high-resolution FISH. Cytogenet Genome Res 2010; 132:248-54. [PMID: 21178330 DOI: 10.1159/000322717] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2010] [Indexed: 01/28/2023] Open
Abstract
The discovery of complex structural variations that exist within individual genomes has prompted a need to visualize chromosomes at a higher resolution than previously possible. To address this concern, we established a robust, high-resolution fluorescence in situ hybridization (FISH) method that utilizes probes derived from high complexity libraries of long oligonucleotides (>150 mers) synthesized in massively parallel reactions. In silico selected oligonucleotides, targeted to only the most informative elements in 18 genomic regions of interest, eliminated the need for suppressive hybridization reagents. Because of the inherent flexibility in our probe design methods, we readily visualized regions as small as 6.7 kb with high specificity on human metaphase chromosomes, resulting in an overall success rate of 94%. Two-color FISH over a 479-kb duplication, initially reported as being identical in 2 individuals, revealed distinct 2-color patterns representing direct and inverted duplicons, demonstrating that visualization by high-resolution FISH provides further insight in the fine-scale complexity of genomic structures. The ability to design FISH probes for any sequenced genome along with the ease, reproducibility, and high level of accuracy of this technique suggests that it will be powerful for routine analysis of previously difficult genomic regions and structures.
Collapse
Affiliation(s)
- N A Yamada
- Agilent Laboratories, Agilent Technologies, Santa Clara, Calif., USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Friedrichs D, Peter B, Pfister E, Böse B, Böckelmann I. Ergebnisse einer Herz-Kreislauf-Präventionstudie bei Angestellten einer Großstadtverwaltung. Gesundheitswesen 2009; 71:e1-9. [DOI: 10.1055/s-0028-1087181] [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]
|
21
|
Fischer M, Schröder A, Peter B, Meyer C, Chan A, Gold R. Plasmapherese in der Eskalationstherapie der Multiplen Sklerose – eine Langzeitbeobachtung. Akt Neurol 2008. [DOI: 10.1055/s-0028-1086844] [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]
|
22
|
Hunjan S, Rosen I, Peter B, Prado K, Luo D, Starkschall G, Liu H, Stevens C, Mohan R. Characterization of Breathing Patterns of Patients undergoing Respiratory-Correlated Imaging. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.357] [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: 10/25/2022]
|
23
|
Abstract
In an attempt to increase the life of cementless prostheses, an hydroxyapatite-coated implant which releases a bisphosphonate has been suggested as a drug-delivery system. Our in vitro study was designed to determine the maximum dose to which osteoblasts could be safely exposed. Our findings demonstrated that zoledronate did not impair the proliferation of human osteoblasts when used at concentrations below 1 μm. Murine cells can be exposed to concentrations as high as 10 μm. A concentration of 0.01% of titanium particles did not impair the proliferation of either cell line. Zoledronate affected the alkaline phosphatase activity of murine osteoblasts through a chelation phenomenon. The presence of titanium particles strongly decreased the alkaline phosphatase activity of murine osteoblasts. We did not detect any synergic effect of zoledronate and titanium particles on the behaviour of both human and murine osteoblasts.
Collapse
Affiliation(s)
- B Peter
- Laboratory of Orthopaedic Research, Swiss Federal Institute of Technology, Lausanne, Switzerland
| | | | | | | |
Collapse
|
24
|
Elvedji-gasparovic V, Peter B, Klepac-pulanic T. Crit Care 2005; 9:P11. [DOI: 10.1186/cc3074] [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: 11/10/2022] Open
|
25
|
Peter B, Pioletti DP, Laïb S, Bujoli B, Pilet P, Janvier P, Guicheux J, Zambelli PY, Bouler JM, Gauthier O. Calcium phosphate drug delivery system: influence of local zoledronate release on bone implant osteointegration. Bone 2005; 36:52-60. [PMID: 15664002 DOI: 10.1016/j.bone.2004.10.004] [Citation(s) in RCA: 178] [Impact Index Per Article: 9.4] [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] [Received: 04/05/2004] [Revised: 08/23/2004] [Accepted: 10/12/2004] [Indexed: 10/26/2022]
Abstract
Despite total hip replacement (THR) gives generally satisfactory results, the quality of outcome in young patients is markedly decreased compared to the average THR outcome. For this population, pharmacological treatment with bisphosphonate would be beneficial to decrease the peri-implant osteolysis. However, as this population does not necessarily suffer from osteoporosis, a nonsystemic treatment would be preferable. Zoledronate was then grafted to hydroxyapatite (HA) coating of titanium implants. The implants were inserted in rat condyles with various zoledronate concentrations. A positive concentration-dependent effect was observed on the peri-implant bone density and on different histomorphometric parameters. Importantly for the outcome of the implants, the mechanical fixation was increased by the local presence of zoledronate. The obtained results open the way of an easy transformation of currently existing HA-coated implants by grafting bisphosphonate onto the coating in order to increase their service life in the patients.
Collapse
Affiliation(s)
- B Peter
- Bone Bioengineering Group, Laboratory of Orthopedic Research, Swiss Federal Institute of Technology Lausanne, Switzerland
| | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Peter B, Ramaniraka N, Rakotomanana LR, Zambelli PY, Pioletti DP. Peri-implant Bone Remodeling after Total Hip Replacement Combined with Systemic Alendronate Treatment: A Finite Element Analysis. Comput Methods Biomech Biomed Engin 2004; 7:73-8. [PMID: 15203955 DOI: 10.1080/1025584042000205327] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 10/26/2022]
Abstract
In order to decrease the peri-implant bone loss during the life-time of the implant, oral use of anti-osteoporosis drugs (like bisphosphonates) has been suggested. In this study, bone remodeling parameters identified from clinical trials of alendronate were used to simulate the effect of those drugs used after total hip arthroplasty on the peri-implant bone density. Results of the simulation show that the oral administrated drugs increase bone density around the implant and decreases, at the same time, the micromovements between the implant and the surrounding bone tissue. Incorporation of drug effect in numerical studies of bone remodeling is a promising tool especially to predetermine safe bisphosphonate doses that could be used with orthopedic implants.
Collapse
Affiliation(s)
- B Peter
- Center for Orthopedic Research, Swiss Federal Institute of Technology, 1015 Lausanne, Switzerland
| | | | | | | | | |
Collapse
|
27
|
von Büren T, Peter B, Oehlschlegel C, Grossenbacher R. [Deglutition problems and dyspnea with stridor. Cervical high-grade type osteosarcoma, apparently of extraskeletal origin]. HNO 2003; 51:912-4. [PMID: 14605711 DOI: 10.1007/s00106-003-0879-x] [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: 10/26/2022]
Affiliation(s)
- T von Büren
- Klinik für Ohren-, Nasen-, Halsheilkunde, Hals- und Gesichtschirurgie, Kantonsspital St. Gallen, St. Gallen.
| | | | | | | |
Collapse
|
28
|
Pozniak A, Gazzard B, Anderson J, Babiker A, Churchill D, Collins S, Fisher M, Johnson M, Khoo S, Leen C, Loveday C, Moyle G, Nelson M, Peter B, Phillips A, Pillay D, Wilkins E, Williams I, Youle M. British HIV Association (BHIVA) guidelines for the treatment of HIV-infected adults with antiretroviral therapy. HIV Med 2003; 4 Suppl 1:1-41. [PMID: 14511246] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- A Pozniak
- Chelsea and Westminster Hospital, London, UK.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Böckelmann I, Darius S, McGauran N, Robra BP, Peter B, Pfister EA. The psychological effects of exposure to mixed organic solvents on car painters. Disabil Rehabil 2002; 24:455-61. [PMID: 12097214 DOI: 10.1080/09638280110102126] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [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: 10/14/2022]
Abstract
PURPOSE Interest in diseases of the nervous system resulting from occupational exposure to mixed organic solvents has greatly increased. The aim of our study was to identify preclinical effects of low-level chronic solvent exposure on the central nervous system in car painters by assessing their cognitive performance. METHODS This psychological study involved 169 clinically healthy male volunteers (84 car painters and 85 controls) and is part of a comprehensive study investigating effects of solvent exposure. The test battery included paper-pencil tests (vocabulary test, block design test, c.i., d2 test), computer-based tests (digit span test, simple-choice reaction time test), and a questionnaire to assess the participants' mental state. RESULTS Car painters with long-term exposure to solvents showed psychological deviations such as deficits in concentration, memory and reaction time compared to unexposed subjects. The significant differences between the two groups were confirmed by multivariate statistical analysis. CONCLUSIONS Our study displayed psychological effects associated with long-term solvent exposure in concentrations below German threshold limit values. These findings emphasize the necessity to promote the resolute compliance with occupational safety and health regulations in affected companies.
Collapse
Affiliation(s)
- I Böckelmann
- Institute of Occupational Medicine and Hygiene, Otto-von-Guericke University of Magdeburg, Germany.
| | | | | | | | | | | |
Collapse
|
30
|
Abstract
OBJECTIVE To compare the course and outcome of triplet gestations under a preventive care strategy that includes hospitalization, surveillance, bed rest, and daily specialized care from the beginning of the second trimester, with pregnancies managed according to the Croatian standard outpatient care protocol for multiplets. METHODS A retrospective study of 79 triplet pregnancies. Preventive hospitalization from the beginning of the second trimester, with complete bed rest and all necessary interventions, was chosen by 55 women (Group I). The remaining 24 women (Group II) elected the standard outpatient protocol for multiple pregnancies. Outpatient management with prophylactic bed rest was initiated at home as soon as the multiple pregnancy was diagnosed. After 28 weeks of gestation, all outpatients were hospitalized until delivery irrespective of symptoms. RESULTS There was no difference between the groups regarding maternal age, race, pre-pregnancy weight and height, weight gain during the first 24 weeks of pregnancy, or the proportion of pregnancies achieved with assisted reproductive technology. Four out of 55 women (7.2%) from Group I and 4 out of 24 women (12.5%) from Group II had monochorionic triplet pregnancies (P=n.s.). Nulliparity was more frequent in Group I than in Group II (P=0.006). Elective cesarean delivery was significantly more frequent in Group I (46 out of 55 gestations, 72.7%) than in Group II (9 out of 24 gestations, 37.5%), P=0.024. Gestational age at delivery and mean birth weight were significantly higher in Group I than in Group II (P<0.001). Deliveries up to 28 weeks of pregnancy were infrequent in Group I (P=0.02). Thirty-three gestations in Group I (60%) and 6 (25%) in Group II had a duration of 33-36 weeks (P<0.001). Two out of 55 triplet gestations in Group I (3.6%) and 4 out of 24 in Group II (16.7%) ended in spontaneous abortion (P=0.053). The survival of the three triplets was more frequent in Group I than in Group II (P=0.048). For gestations reaching 24 weeks or more, the fetal and perinatal death rate was significantly lower in Group I (P<0.001). In Group I the intrauterine death rate for fetuses weighing 1500 g or less was also significantly lower (P=0.007), and the early neonatal death rate was almost half (15.8 vs. 28.9%, P=0.157). There were no differences in other pregnancy complications between the two groups except significantly more frequent preterm premature rupture of membranes and preterm labor requiring parenteral tocolysis in Group II (P=0.042 and 0.036, respectively), and significantly more frequent fetal growth retardation in Group I (P<0.001). CONCLUSION Preventive hospitalization offers a better outcome for triplets even though prolonged hospitalization and all other procedures necessary to achieve optimal pregnancy outcome are also offered in the Croatian standard outpatient care protocol for multiplet pregnancies.
Collapse
Affiliation(s)
- S Skrablin
- Department of Perinatal Medicine, School of Medicine, University of Zagreb, Petrova 13, Croatia.
| | | | | | | | | |
Collapse
|
31
|
Vejda S, Cranfield M, Peter B, Mellor SL, Groome N, Schulte-Hermann R, Rossmanith W. Expression and dimerization of the rat activin subunits betaC and betaE: evidence for the ormation of novel activin dimers. J Mol Endocrinol 2002; 28:137-48. [PMID: 11932210 DOI: 10.1677/jme.0.0280137] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [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: 11/27/2022]
Abstract
Activins are cytokines of the transforming growth factor beta family, which plays a central role in the determination of cell fate and the regulation of tissue balance. Family members are composed of two subunits and this dimerization is critical for liganding their cognate receptors and execution of proper functions. In the current study we focused on the localization of activin betaA, betaB, betaC and betaE subunits in the adult rat and analyzed the composition of putative activin beta dimers. By dissecting tissue distribution of various activins, we found that the liver, in particular the hepatocytes, is the major source for activin betaC and betaE transcripts, since other tissues almost failed to express these isoforms. In sharp contrast, the emergence of activin betaA and betaB appeared ubiquitous. Using a highly selective proteome approach, we were able to identify homo- as well as heterodimers of individual activin subunits, indicating a high redundancy of ligand composition. Certainly, this broad potential to homo- and heterodimerize has to be considered in future studies on activin function.
Collapse
Affiliation(s)
- S Vejda
- Institute for Cancer Research, University of Vienna, 1090 Wien, Austria
| | | | | | | | | | | | | |
Collapse
|
32
|
Riedl S, Peter B, Geiss HK, Aulmann M, Bach A, Lehnert T. [Microbiological and clinical effects of selective bowel decontamination in transthoracic resection of carcinoma of the esophagus and cardia]. Chirurg 2001; 72:1160-70. [PMID: 11715619 DOI: 10.1007/s001040170055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 11/26/2022]
Abstract
INTRODUCTION Surgical therapy of carcinoma of the esophagus or cardia by transthoracic esophageal resection is associated with a high morbidity in which nosocomial infections have a great importance. This study investigates the influence of prophylactic selective bowel decontamination on the course and results of transthoracic resection of the esophagus. METHODS Seventy patients with carcinoma of the esophagus and cardia were included in this prospective and partially randomized study at the University of Heidelberg. Twenty-five patients received prophylactically selective bowel decontamination with tobramycin, polymyxin B and amphotericin B. The treatment course was documented uniformly. In addition, microbiological screening was performed by swab examinations of nose, throat and anus, by urine and blood cultures, and the documentation of results of additional microbiological diagnostic studies. RESULTS Bacteriological screening confirmed a reduction in infectious agents and a change of their spectrum in the respiratory and digestive tract without an increase in multiresistant bacteria. Patients who received selective bowel decontamination had a lower infection rate, a shorter artificial respiration period and a shorter intensive care stay without statistically significant differences. The mortality rate was 4% vs 9% in the control group (95% confidence interval -0.172-0.116). CONCLUSION This study confirms the feasibility and microbiological effectiveness of selective bowel decontamination in the context of surgical therapy which is associated with a high nosocomial infection rate. The result of the clinical treatment seems slightly more favorable in the treatment group. Decisive are complications caused by surgery which fundamentally determine the clinical course and frequently cause infectious complications. The prophylactic use of selective bowel decontamination may be useful in patients with an increased risk of prolonged ventilation support or colon interposition but it is not to be generally recommended.
Collapse
Affiliation(s)
- S Riedl
- Abteilung Allgemeine Chirurgie, Unfallchirurgie und Poliklinik, Chirurgischen Universitätsklinik.
| | | | | | | | | | | |
Collapse
|
33
|
Courcelle J, Khodursky A, Peter B, Brown PO, Hanawalt PC. Comparative gene expression profiles following UV exposure in wild-type and SOS-deficient Escherichia coli. Genetics 2001; 158:41-64. [PMID: 11333217 PMCID: PMC1461638 DOI: 10.1093/genetics/158.1.41] [Citation(s) in RCA: 583] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The SOS response in UV-irradiated Escherichia coli includes the upregulation of several dozen genes that are negatively regulated by the LexA repressor. Using DNA microarrays containing amplified DNA fragments from 95.5% of all open reading frames identified on the E. coli chromosome, we have examined the changes in gene expression following UV exposure in both wild-type cells and lexA1 mutants, which are unable to induce genes under LexA control. We report here the time courses of expression of the genes surrounding the 26 documented lexA-regulated regions on the E. coli chromosome. We observed 17 additional sites that responded in a lexA-dependent manner and a large number of genes that were upregulated in a lexA-independent manner although upregulation in this manner was generally not more than twofold. In addition, several transcripts were either downregulated or degraded following UV irradiation. These newly identified UV-responsive genes are discussed with respect to their possible roles in cellular recovery following exposure to UV irradiation.
Collapse
Affiliation(s)
- J Courcelle
- Department of Biochemistry, Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA.
| | | | | | | | | |
Collapse
|
34
|
Peter B. [Ultrasound diagnosis of face and neck organs]. Praxis (Bern 1994) 2001; 90:687-691. [PMID: 11372271] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Sonography of the neck and face is highly suited for confirming visible, palpable or generally tentative findings. A method of performing a systematic examination will be described in detail and followed by numerous examples descriptive of soft tissue pathologies of the face, salivary glands and lymph nodes. The thyroid gland will be dealt with in a different report. The criterion that applied to all masses was that it was only possible to render a tentative diagnosis to be subsequently confirmed by sonography-guided fine-needle aspiration. Histological follow-up, however, was never excluded. If a finding could not be narrowed down by sonography, the next step was to use computerized or nuclear magnetic resonance imaging.
Collapse
Affiliation(s)
- B Peter
- Klinik für Ohren-, Nasen-, Halsheilkunde, Hals- und Gesichtschirurgie, Kantonsspital St. Gallen
| |
Collapse
|
35
|
Wendisch VF, Zimmer DP, Khodursky A, Peter B, Cozzarelli N, Kustu S. Isolation of Escherichia coli mRNA and comparison of expression using mRNA and total RNA on DNA microarrays. Anal Biochem 2001; 290:205-13. [PMID: 11237321 DOI: 10.1006/abio.2000.4982] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bacterial messenger RNA (mRNA) is not coherently polyadenylated, whereas mRNA of Eukarya can be separated from stable RNAs by virtue of polyadenylated 3'-termini. We have developed a method to isolate Escherichia coli mRNA by polyadenylating it in crude cell extracts with E. coli poly(A) polymerase I and purifying it by oligo(dT) chromatography. Differences in lacZRNA levels were similar with purified mRNA and total RNA in dot blot hydridizations for cultures grown with or without gratuitous induction of the lactose operon. More broadly, changes in gene expression upon induction were similar when cDNAs primed from mRNA or total RNA with random hexanucleotides were hydridized to DNA microarrays for the E. coli genome. Comparable signal intensities were obtained with only 1% as much oligo(dT)-purified mRNA as total RNA, and hence in vitro poly(A) tailing appears to be selective for mRNA. These and additional studies of genome-wide expression with DNA microarrays provide evidence that in vitro poly(A) tailing works universally for E. coli mRNAs.
Collapse
Affiliation(s)
- V F Wendisch
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
| | | | | | | | | | | |
Collapse
|
36
|
Peter B. [Cervicofacial necrotizing fasciitis]. Schweiz Med Wochenschr Suppl 2000; 116:58S-61S. [PMID: 10780074] [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] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
INTRODUCTION Necrotising fasciitis is still a severe disease whose outcome is occasionally fatal. METHODS Between August 1994 and August 1998, 6 patients with necrotising fasciitis, 5 in the neck area and one in the facial area, were treated. The source of the infection was odontogenic in 3 cases, pharyngeal in 2 and an insect sting in the left upper eyelid in one case. RESULTS Following evaluation by CT scan, immediate surgical exploration with debridement and drainage was performed. Revision proved necessary in most cases. One patient suffered severe complications. Median stay in the intensive care unit was 7 days and in hospital 20 days. DISCUSSION Deep and extensive neck infections require investigation by CT scan. All affected areas must be explored and drained immediately, including thoracotomy if mediastinitis is present. Apart from appropriate antibiotic therapy, the further course of the disease should be carefully monitored to detect further spread of the infection as well as complications.
Collapse
Affiliation(s)
- B Peter
- Klinik für Hals-Nasen-Ohrenheilkunde, Hals- und Gesichtschirurgie, Kantonsspital St. Gallen
| |
Collapse
|
37
|
Peter B. [Recurrent inflammation of cartilaginous structures. Relapsing polychondritis]. HNO 1999; 47:996-7. [PMID: 10602793 DOI: 10.1007/s001060050483] [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: 11/26/2022]
Affiliation(s)
- B Peter
- Klinik für Ohren-, Nasen-, Halsheilkunde, Hals- und Gesichtschirurgie, Kantonsspital St. Gallen, CH-9007 St. Gallen
| |
Collapse
|
38
|
Abstract
The fixation of osteosynthesis screws remains a severe problem for fracture repair among osteoporotic patients. Polymethyl-methacrylate (PMMA) is routinely used to improve screw fixation, but this material has well-known drawbacks such as monomer toxicity, exothermic polymerization, and nonresorbability. Calcium phosphate cements have been developed for several years. Among these new bone substitution materials, brushite cements have the advantage of being injectable and resorbable. The aim of this study is to assess the reinforcement of osteosynthesis screws with brushite cement. Polyurethane foams, whose density is close to that of cancellous bone, were used as bone model. A hole was tapped in a foam sample, then brushite cement was injected. Trabecular osteosynthesis screws were inserted. After 24 h of aging in water, the stripping force was measured by a pull-out test. Screws (4.0 and 6.5 mm diameter) and two foam densities (0.14 and 0.28 g/cm3) were compared. Cements with varying solid/liquid ratios and xanthan contents were used in order to obtain the best screw reinforcement. During the pull-out test, the stripping force first increases to a maximum, then drops to a steady-state value until complete screw extraction. Both maximum force and plateau value increase drastically in the presence of cement. The highest stripping force is observed for 6.5-mm screws reinforced with cement in low-density foams. In this case, the stripping force is multiplied by 3.3 in the presence of cement. In a second experiment, cements with solid/liquid ratio ranging from 2.0 to 3.5 g/mL were used with 6.5-mm diameter screws. In some compositions, xanthan was added to improve injectability. The best results were obtained with 2.5 g/mL cement containing xanthan and with 3.0 g/mL cements without xanthan. A 0.9-kN maximal stripping force was observed with nonreinforced screws, while 1.9 kN was reached with reinforced screws. These first results are very promising regarding screw reinforcement with brushite cement. However, the polyurethane foam model presents noninterconnected porosity and physiological liquid was not modelized.
Collapse
Affiliation(s)
- P Van Landuyt
- Department of Materials Science, Swiss Federal Institute of Technology, Lausanne.
| | | | | | | |
Collapse
|
39
|
Francisc F, Peter B. [Ergo-ophthalmologic problems of electronic display devices]. Oftalmologia 1999; 45:4-9. [PMID: 10418621] [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] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
The paper approaches the problem of activity in front of a display. The authors show the compounds of an electronic device, theirs effects on visual acuity of the worker and the condition that are needed for visual comfort. Ergo-ophthalmologically it is important to examine periodically all the employers that use displays.
Collapse
Affiliation(s)
- F Francisc
- Disciplina de Oftalmologie, Universitatea de Medicina şi Farmacie, Târgu Mureş
| | | |
Collapse
|
40
|
Abstract
Aureobasidium pullulans, a yeast-like microorganism was found to produce mannobiose permease and xylobiose permease, transporting beta-1,4-mannobiose or beta-1,4-xylobiose into the cells from extracellular media. Both permeases are induced by the same inducers as the corresponding hemicellulolytic enzyme systems. Mannobiose permease is induced by beta-1,4-mannobiose or is formed in the cells growing on mannan (inducers of beta-mannanolytic enzymes) and xylobiose permease is induced by d-xylose, beta-1,4-xylobiose or during the growth on xylan (inducers of xylanolytic enzymes). The permeases are energy dependent, synthesized de novo and their activities are inhibited by d-glucose. Since mannobiose permease transports beta-1,4-mannobiose, xylobiose permease appears to be less specific and transports beta-1,4-mannobiose, beta-1,4-xylobiose and methyl beta-d-xylopyranoside. Methyl beta-d-mannopyranoside or methyl beta-d-xylopyranoside serve as less efficient inducers of the corresponding permeases than beta-1,4-mannobiose or beta-1, 4-xylobiose.
Collapse
Affiliation(s)
- K Lubomír
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 842 38 Bratislava, Slovak Republic.
| | | |
Collapse
|
41
|
Abstract
With regard to the potentialities of hypnosis for the treatment of pain, relevant studies on hypnotic pain control are discussed. Studies with experimentally produced pain unanimously show that hypnosis is effective in controlling pain, whereas clinical studies are much more ambiguous in this respect. Three basic strategies of hypnotic pain control are outlined to which the different techniques can be subsumed: dissociative, associative, and symbolic strategies. Accountable for the limitations of hypnosis are some issues like hypnotic state, hypnotizability, rapport, hypnotic techniques, and pain as a multifactorial process. These issues are discussed and their contribution to contraindications are outlined. Especially the differences between symptom- and problem-oriented hypnotic approaches are highlighted.
Collapse
Affiliation(s)
- B Peter
- Milton Erickson Gesellschaft für klinische Hypnose, Munich
| |
Collapse
|
42
|
Riedl S, Peter B, Hinz U, Wunsch A, Bach A, Lehnert T, Herfarth C. Effect of the perioperative selective bowel decontamination in abdomlnothoracal resections of the esophagus. Eur J Cancer 1997. [DOI: 10.1016/s0959-8049(97)84460-7] [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: 11/26/2022]
|
43
|
Abstract
BACKGROUND Inverted papilloma is a rare benign tumor of the nose and the paranasal sinuses. There is a controversial discussion concerning the operative approach. The epidemiology, postoperative results, and recurrence rates of endonasally and extranasally operated patients are analysed. PATIENTS Between 1984 and 1995, 25 patients with inverted papilloma were operated upon at the ENT Department St. Gallen, 18 patients by an endonasal microscopic approach, two by midfacial degloving and five through a lateral rhinotomy. RESULTS After a minimal follow-up of 12 months (mean follow-up 52 months), a recurrence rate of 29% for the external approach and 31% for the endonasal approach was observed. CONCLUSIONS In most cases it is possible to achieve a good result through an endonasal approach. External approaches are recommended in T4-tumors or carcinomas. A longtime follow-up is recommended for each case.
Collapse
Affiliation(s)
- B Peter
- Klinik für Ohren-Nasen-Halsheilkunde, Hals- und Gesichtschirurgie, Kantonsspital St. Gallen
| | | |
Collapse
|
44
|
Surmann P, Peter B, Stark C. Simulation of titration curves indicated with two indicator electrodes (biamperometry). Anal Bioanal Chem 1996; 356:173-7. [PMID: 15048347 DOI: 10.1007/s0021663560173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/1995] [Revised: 05/20/1996] [Accepted: 05/30/1996] [Indexed: 10/26/2022]
Abstract
A rigorous method to simulate titration curves with indication using two indicator electrodes (biamperometry) is presented. Computer simulations can be carried out for reversible as well as for irreversible systems. The different parameters like the area of the individual electrodes, applied potential difference, heterogeneous rate constant, and the kinetic parameter alpha were varied and investigated as to their influence upon the shape of the titration curves. The theoretically derived effects match with the effects obtained by experiment. Considering the effects described here, it is possible to tailor the shape of the titration curve by the experimental conditions for specific applications in order to get an optimum shape at the end point of the titration.
Collapse
Affiliation(s)
- P Surmann
- Institut für Pharmazie der Humboldt-Universität Berlin, Goethestrasse 54, D-13086, Berlin, Germany
| | | | | |
Collapse
|
45
|
Surmann P, Peter B, Stark C. Bivoltametric titrations using electrodes with innovative geometry. Anal Bioanal Chem 1996; 356:192-6. [PMID: 15048351 DOI: 10.1007/s0021663560192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/1995] [Revised: 04/11/1996] [Accepted: 04/16/1996] [Indexed: 11/30/2022]
Abstract
Electrodes with different surface areas were investigated for the determination of reversible, quasireversible, irreversible or electroinactive substrates. Two kinds of electrodes were constructed, a helical electrode with a given asymmetry and a platinum array electrode with a variable area. These electrodes were applied for the cerimetry of ammonium iron(II) sulfate and for the bromatometry of various organic substances. The theoretically derived effects on the shape of the voltametric titration curve are verified experimentally. It is possible to sharpen one side of the peak and to broaden the other side, depending on the system and the side of the peak one is interested in. It is possible to improve the bivoltametric determination of hydroquinone, benzocaine and sulfaguanidine by bromatometry by the directed employment of electrodes of different areas. For the bromatometric determination of electrochemically irreversible substrates the use of the electrode geometries proposed is a way to obtain a sharp bend and a steep decrease of titration curves with low values of the constant current which is a basic requirement for the accuracy.
Collapse
Affiliation(s)
- P Surmann
- Institute of Pharmacy of the Humboldt-University Berlin, Goethestrasse 54, D-13086, Berlin, Germany
| | | | | |
Collapse
|
46
|
Grange F, Schoenlaub P, Tortel MC, Peter B, Audhuy B, Guillaume JC. [AIDS-related eosinophilic folliculitis. Efficacy of high dose topical corticotherapy]. Ann Dermatol Venereol 1996; 123:456-9. [PMID: 9033714] [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: 02/03/2023]
Abstract
INTRODUCTION A chronic pruriginous eruption of eosinophil-rich follicular papules and pustules is observed in AIDS patients. The pathogenesis of this disease, termed eosinophil folliculitis, is poorly understood and treatment is debated. CASE REPORT A 30-year-old woman with AIDS developed highly pruriginous lesions of 5 month duration localized on the face, the trunk and upper limbs. There were papulo-pustules and excoriated papules. The elementary lesion was a follicular pustula. The eosinophil count was normal. The pathology examination revealed a rich eosinophil infiltration around the hair follicles and sebaceous glands as well as follicular spongiosis. Search for demodex, pityrosporons and a large number of infectious agents was negative. Oral minocyclin was uneffective. Local high-dose corticosteroids produced a remarkable effect and led to complete remission in 9 months. DISCUSSION Most cases of eosinophil folliculitis associated with AIDS have been reported in men, but rarely in Europe. The remarkable efficacy of the local corticosteroid in this case was exceptional. This condition could result from inappropriate inflammatory reaction in AIDS induced by various factors including demodex and pityrosporon. Several therapeutic approaches have been proposed to eradicate the triggering factors and others to modify the immune response. The exceptional response to the short local treatment with corticosteroids would suggest that this approach could be proposed as first intention treatment in eosinophil folliculitis associated with AIDS.
Collapse
Affiliation(s)
- F Grange
- Service de Dermatologie, Hôpital Pasteur, Cedex
| | | | | | | | | | | |
Collapse
|
47
|
Leader DP, Peter B, Ehmer B. Analysis of CpG dinucleotide frequency in relationship to translational reading frame suggests a class of genes in which mutation of this dinucleotide is asymmetric with respect to DNA strand. FEBS Lett 1995; 376:125-9. [PMID: 7498525 DOI: 10.1016/0014-5793(95)01268-3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Results are described from application of a computer program that compares the expected and actual incidence of CpG dinucleotides in relation to the codon reading frame of genes, assuming a conserved amino acid sequence and normalizing for the third-position incidences of C and G in the remainder of the sequence. Sequences encoding certain proteins showed a pronounced bias in favour of CpG in the (3,1) compared with the (2,3) codon position; whereas sequences encoding related proteins expressed to a similar extent or in the same tissue did not. We propose that the cases exhibiting this bias reflect a difference between the two strands of the DNA duplex in their susceptibility to loss of CpG dinucleotides by mutation. Although in vertebrates this loss of CpG dinucleotides from the sense strand might reflect strand-asymmetry in deamination of 5-methylcytosine residues, the fact that a similar CpG codon bias is found in some invertebrates indicates that other factor(s) must also be involved.
Collapse
Affiliation(s)
- D P Leader
- Department of Biochemistry, University of Glasgow, UK
| | | | | |
Collapse
|
48
|
Peter B. [Magnetism and immorality--or the rapid demise of magnetism in Berlin around 1819-1820]. Psychother Psychosom Med Psychol 1995; 45:266-76. [PMID: 7568647] [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: 01/26/2023]
Abstract
In the years 1821 and 1822 two books offered contradictory accounts of a scandal in Berlin involving sexual abuse in connection with magnetism. Historical research has determined that the accused was the famous physician and magnetizer Karl Christian Wolfart. If, however, we look more closely at the general context, it appears that this was not just a case of abuse of the therapeutic relationship. Rather, it is suggested that a specific combination of therapeutic ignorance and particular psycho-social influences contributed almost inevitably to the abuse of patients--sexually or otherwise.
Collapse
Affiliation(s)
- B Peter
- Milton Erickson Gesellschaft für Klinische Hypnose, München
| |
Collapse
|
49
|
Abstract
By correlating the intraoperative findings and the postoperative hearing gain it was attempted to determine the recommendable intraoperative management in stapesrevisions in order to obtain the best postoperative hearing. In a retrospective study the findings of 39 stapes revision operations were analyzed. In most of the cases hearing one year postoperatively was compared with preoperative hearing. The prognosis for good hearing was best following replacement of the prosthesis where the prosthesis was too short or dislocated, or in the presence of a loosened wire. Where treatment only entailed retightening the loosened wire at the long process of the incus, postoperative hearing did not improve. Patients with an obliterative otosclerosis or an additional fixed incus had a less favorable prognosis. Overall a postoperative air bone gap of 10 dB or below was obtained in 44% of the patients and a postoperative air bone gap of 20 dB or below in 77% of the patients. Twenty-one percent of the patients remained unchanged, and in one patient postoperative deterioration of the hearing was detected.
Collapse
Affiliation(s)
- B Peter
- Klinik für Ohren-Nasen-Halsheikunde, Hals- und Gesichtschirurgie, Kantonsspital St. Gallen/Schweiz
| | | |
Collapse
|
50
|
Peter B, Van Waarde MA, Vissink A, 's-Gravenmade EJ, Konings AW. Degranulation of rat salivary glands following treatment with receptor-selective agonists. Clin Exp Pharmacol Physiol 1995; 22:330-6. [PMID: 7554423 DOI: 10.1111/j.1440-1681.1995.tb02010.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [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: 01/25/2023]
Abstract
1. The aim of this study was to find a drug that induces an almost complete degranulation of secretory cells in rat parotid and submandibular glands. 2. Phenylephrine (alpha-adrenergic), isoproterenol (beta-adrenergic) and mecholine (muscarinic cholinergic) were tested. Time and degree of maximal depletion of acinar and granular convoluted tubule cells were determined morphologically. 3. Following phenylephrine-injection (5 mg/kg or 10.2 mg/kg, i.p.), no effect on the acinar granulation level was observed in either of the glands, while about 50-60% granular convoluted tubules were degranulated for at least 120-180 min post-injection. 4. With isoproterenol (5, 10, 40, 70 or 100 mg/kg, i.p.), degranulation of 100% of the acinar cells in the parotid and 80% of the acinar cells in the submandibular gland was observed 90 min post-injection. Granular convoluted tubule cells did not respond to this beta-adrenergic drug. 5. Mecholine (3.75 or 7.5 mg/kg, i.p.) induced mainly degranulation of granular convoluted tubule cells (about 50% after 120 min). Numbers of granulated acinar cells decreased only slightly in both glands (about 10%, 90-120 min). 6. From this study it appears that with a relatively low dosage (5 mg/kg, i.p.) of isoproterenol, a high level of degranulation can be induced in acinar cells of rat parotid and submandibular glands without toxic side effects. Concerning granular convoluted tubules, only moderate degranulation was observed with phenylephrine and mecholine, respectively.
Collapse
Affiliation(s)
- B Peter
- Department of Radiobiology, University of Groningen, The Netherlands
| | | | | | | | | |
Collapse
|