46 results on '"Sutter, Andreas"'
Search Results
2. The condition‐dependence of male genital size and shape
- Author
-
Pennell, Tanya M., primary, Sharma, Manmohan D., additional, Sutter, Andreas, additional, Wilson, Drew T., additional, House, Clarissa M., additional, and Hosken, David J., additional
- Published
- 2024
- Full Text
- View/download PDF
3. Effects of a male meiotic driver on male and female transcriptomes in the house mouse
- Author
-
Lindholm, Anna, Sutter, Andreas, Künzel, Sven, Tautz, Diethard, and Rehrauer, Hubert
- Published
- 2019
4. Controlling invasive rodents via synthetic gene drive and the role of polyandry
- Author
-
Manser, Andri, Cornell, Stephen J., Sutter, Andreas, Blondel, Dimitri V., Serr, Megan, Godwin, John, and Price, Tom A. R.
- Published
- 2019
5. The baculum affects paternity success of first but not second males in house mouse sperm competition
- Author
-
Winkler, Lennart, Lindholm, Anna K., Ramm, Steven A., and Sutter, Andreas
- Published
- 2021
- Full Text
- View/download PDF
6. DNA repair inhibitors sensitize cells differently to high and low LET radiation
- Author
-
Bannik, Kristina, Madas, Balázs, Jarke, Sabrina, Sutter, Andreas, Siemeister, Gerhard, Schatz, Christoph, Mumberg, Dominik, and Zitzmann-Kolbe, Sabine
- Published
- 2021
- Full Text
- View/download PDF
7. Radiobiological effects of the alpha emitter Ra-223 on tumor cells
- Author
-
Bannik, Kristina, Madas, Balázs, Jarzombek, Marco, Sutter, Andreas, Siemeister, Gerhard, Mumberg, Dominik, and Zitzmann-Kolbe, Sabine
- Published
- 2019
- Full Text
- View/download PDF
8. Detrimental effects of an autosomal selfish genetic element on sperm competitiveness in house mice
- Author
-
Sutter, Andreas and Lindholm, Anna K.
- Published
- 2015
9. De novo pyrimidine synthesis is a targetable vulnerability in IDH mutant glioma
- Author
-
Shi, Diana D., primary, Savani, Milan R., additional, Levitt, Michael M., additional, Wang, Adam C., additional, Endress, Jennifer E., additional, Bird, Cylaina E., additional, Buehler, Joseph, additional, Stopka, Sylwia A., additional, Regan, Michael S., additional, Lin, Yu-Fen, additional, Puliyappadamba, Vinesh T., additional, Gao, Wenhua, additional, Khanal, Januka, additional, Evans, Laura, additional, Lee, Joyce H., additional, Guo, Lei, additional, Xiao, Yi, additional, Xu, Min, additional, Huang, Bofu, additional, Jennings, Rebecca B., additional, Bonal, Dennis M., additional, Martin-Sandoval, Misty S., additional, Dang, Tammie, additional, Gattie, Lauren C., additional, Cameron, Amy B., additional, Lee, Sungwoo, additional, Asara, John M., additional, Kornblum, Harley I., additional, Mak, Tak W., additional, Looper, Ryan E., additional, Nguyen, Quang-De, additional, Signoretti, Sabina, additional, Gradl, Stefan, additional, Sutter, Andreas, additional, Jeffers, Michael, additional, Janzer, Andreas, additional, Lehrman, Mark A., additional, Zacharias, Lauren G., additional, Mathews, Thomas P., additional, Losman, Julie-Aurore, additional, Richardson, Timothy E., additional, Cahill, Daniel P., additional, DeBerardinis, Ralph J., additional, Ligon, Keith L., additional, Xu, Lin, additional, Ly, Peter, additional, Agar, Nathalie Y.R., additional, Abdullah, Kalil G., additional, Harris, Isaac S., additional, Kaelin, William G., additional, and McBrayer, Samuel K., additional
- Published
- 2022
- Full Text
- View/download PDF
10. Function of copulatory plugs in house mice: mating behavior and paternity outcomes of rival males
- Author
-
Sutter, Andreas, Simmons, Leigh W., Lindholm, Anna K., and Firman, Renée C.
- Published
- 2016
- Full Text
- View/download PDF
11. Diskussion der Unsicherheiten und Limitationen
- Author
-
Andres, Norina, Badoux, Alexandre, Dang, Vinh, Hingray, Benoît, Hunziker, Roni, Irniger, Andrea, Müller, Michael, Pfäffli, Matthias, Schwab, Severin, Sutter, Andreas, Viviroli, Daniel, Hegg, Christoph, University of Zurich, Andres, Norina, Steeb, Nicolas, Badoux, Alexandre, and Hegg, Christoph
- Subjects
10122 Institute of Geography ,910 Geography & travel - Published
- 2021
12. Additional file 1 of The baculum affects paternity success of first but not second males in house mouse sperm competition
- Author
-
Winkler, Lennart, Lindholm, Anna K., Ramm, Steven A., and Sutter, Andreas
- Abstract
Additional file 1. Electronic Supplementary Material.
- Published
- 2021
- Full Text
- View/download PDF
13. Ausblick
- Author
-
Andres, Norina, Badoux, Alexandre, Dang, Vinh, Müller, Michael, Pfäffli, Matthias, Schwab, Severin, Sutter, Andreas, Viviroli, Daniel, Hegg, Christoph, University of Zurich, Andres, Norina, Steeb, Nicolas, Badoux, Alexandre, and Hegg, Christoph
- Subjects
10122 Institute of Geography ,910 Geography & travel - Published
- 2021
14. Schlussfolgerungen
- Author
-
Andres, Norina, Badoux, Alexandre, Baer, Patrick, Dang, Vinh, Hunziker, Roni, Irniger, Andrea, Müller, Michael, Pfäffli, Matthias, Schwab, Severin, Steeb, Nicolas, Sutter, Andreas, Viviroli, Daniel, Whealton, Calvin, Hegg, Christoph, University of Zurich, Andres, Norina, Steeb, Nicolas, Badoux, Alexandre, and Hegg, Christoph
- Subjects
10122 Institute of Geography ,910 Geography & travel - Published
- 2021
15. DDRE-29. DE NOVO PYRIMIDINE SYNTHESIS IS A TARGETABLE VULNERABILITY IN IDH-MUTANT GLIOMA
- Author
-
Shi, Diana D, primary, Wang, Adam C, additional, Levitt, Michael M, additional, Endress, Jennifer E, additional, Xu, Min, additional, Gao, Wenhua, additional, Khanal, Januka, additional, Bonal, Dennis, additional, Kornblum, Harley I, additional, Nguyen, Quang-De, additional, Gradl, Stefan, additional, Sutter, Andreas, additional, Jeffers, Michael, additional, Janzer, Andreas, additional, Cahill, Daniel P, additional, Ligon, Keith L, additional, Abdullah, Kalil G, additional, Harris, Isaac S, additional, Kaelin, William G, additional, and McBrayer, Samuel K, additional
- Published
- 2021
- Full Text
- View/download PDF
16. Polyandry provides reproductive and genetic benefits in colonising populations
- Author
-
Lewis, Rebecca C., primary, Pointer, Michael D., additional, Friend, Lucy A., additional, Vasudeva, Ramakrishnan, additional, Bemrose, James, additional, Sutter, Andreas, additional, Gage, Matthew J. G., additional, and Spurgin, Lewis G., additional
- Published
- 2020
- Full Text
- View/download PDF
17. Adaptive thermal plasticity enhances sperm and egg performance in a model insect
- Author
-
Vasudeva, Ramakrishnan, primary, Sutter, Andreas, additional, Sales, Kris, additional, Dickinson, Matthew E, additional, Lumley, Alyson J, additional, and Gage, Matthew JG, additional
- Published
- 2019
- Full Text
- View/download PDF
18. Supplementary Material from Controlling invasive rodents via synthetic gene drive and the role of polyandry
- Author
-
Manser, Andri, Cornell, Stephen J., Sutter, Andreas, Blondel, Dimitri V., Serr, Megan, Godwin, John, and Price, Tom A. R.
- Abstract
PDF file containing all supplementary material- Text S1 "Polyandry and Sperm Competition with an Arbitrary Number of Mating Partners", Text S2 "Analytical Results | Single Release", Text S3 "Analytical Results | Continued Release under Monandry"
- Published
- 2019
- Full Text
- View/download PDF
19. Supplementary Material from Effects of a male meiotic driver on male and female transcriptomes in the house mouse
- Author
-
Lindholm, Anna, Sutter, Andreas, Künzel, Sven, Tautz, Diethard, and Rehrauer, Hubert
- Abstract
Supplementary Methods, Figures and Table S1
- Published
- 2019
- Full Text
- View/download PDF
20. Flexible polyandry in female flies is an adaptive response to infertile males
- Author
-
Sutter, Andreas, primary, Travers, Laura M, additional, Oku, Keiko, additional, L. Delaney, Kynan, additional, J. Store, Stefan, additional, Price, Tom A R, additional, and Wedell, Nina, additional
- Published
- 2019
- Full Text
- View/download PDF
21. Sexual Selection in House Mice (Mus musculus domesticus) and the Role of a Selfish Genetic Element
- Author
-
Sutter, Andreas, University of Zurich, and Sutter, Andreas
- Subjects
10127 Institute of Evolutionary Biology and Environmental Studies ,t haplotype ,UZHDISS UZH Dissertations ,house mouse ,570 Life sciences ,biology ,590 Animals (Zoology) ,sexual selection ,intragenomic conflict ,meiotic drive ,sperm competition - Published
- 2016
22. A novel approach in the treatment of neuroendocrine gastrointestinal tumors: Additive antiproliferative effects of interferon-γ and meta-iodobenzylguanidine
- Author
-
Ahnert-Hilger Gudrun, Huether Alexander, Sutter Andreas P, Höpfner Michael, and Scherübl Hans
- Subjects
Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Therapeutic options to effectively inhibit growth and spread of neuroendocrine gastrointestinal tumors are still limited. As both meta-iodobenzylguanidine (MIBG) and interferon-γ (IFNγ) cause antineoplastic effects in neuroendocrine gastrointestinal tumor cells, we investigated the antiproliferative effects of the combination of IFNγ and non-radiolabeled MIBG in neuroendocrine gut STC-1 and pancreatic carcinoid BON tumor cells. Methods and results IFNγ receptors were expressed in both models. IFNγ dose- and time-dependently inhibited the growth of both STC-1 and of BON tumor cells with IC50-values of 95 ± 15 U/ml and 135 ± 10 U/ml, respectively. Above 10 U/ml IFNγ induced apoptosis-specific caspase-3 activity in a time-dependent manner in either cell line and caused a dose-dependent arrest in the S-phase of the cell cycle. Furthermore, IFNγ induced cytotoxic effects in NE tumor cells. The NE tumor-targeted drug MIBG is selectively taken up via norepinephrine transporters, thereby specifically inhibiting growth in NE tumor cells. Intriguingly, IFNγ treatment induced an upregulation of norepinephrine transporter expression in neuroendocrine tumors cells, as determined by semi-quantitative RT-PCR. Co-application of sub-IC50 concentrations of IFNγ and MIBG led to additive growth inhibitory effects, which were mainly due to increased cytotoxicity and S-phase arrest of the cell cycle. Conclusion Our data show that IFNγ exerts antiproliferative effects on neuroendocrine gastrointestinal tumor cells by inducing cell cycle arrest, apoptosis and cytotoxicity. The combination of IFNγ with the NE tumor-targeted agent MIBG leads to effective growth control at reduced doses of either drug. Thus, the administration of IFNγ alone and more so, in combination with MIBG, is a promising novel approach in the treatment of neuroendocrine gastrointestinal tumors.
- Published
- 2004
- Full Text
- View/download PDF
23. Senescent declines in elite tennis players are similar across the sexes
- Author
-
Sutter, Andreas, primary, Barton, Sam, additional, Sharma, Manmohan Dev, additional, Basellini, Ugofilippo, additional, Hosken, David J, additional, and Archer, C Ruth, additional
- Published
- 2018
- Full Text
- View/download PDF
24. Additional file 1: of Meiotic drive changes sperm precedence patterns in house mice: potential for male alternative mating tactics?
- Author
-
Sutter, Andreas and Lindholm, Anna
- Abstract
Supplementary results and material and methods. (DOC 90Â kb)
- Published
- 2016
- Full Text
- View/download PDF
25. No evidence for female discrimination against male house mice carrying a selfish genetic element
- Author
-
Sutter, Andreas, primary and Lindholm, Anna K., additional
- Published
- 2016
- Full Text
- View/download PDF
26. Meiotic drive changes sperm precedence patterns in house mice: potential for male alternative mating tactics?
- Author
-
Sutter, Andreas, primary and Lindholm, Anna K., additional
- Published
- 2016
- Full Text
- View/download PDF
27. Genotoxicity assessment of peptide/protein-related biotherapeutics: points to consider before testing
- Author
-
Thybaud, Veronique, primary, Kasper, Peter, additional, Sobol, Zhanna, additional, Elhajouji, Azeddine, additional, Fellows, Mick, additional, Guerard, Melanie, additional, Lynch, Anthony M., additional, Sutter, Andreas, additional, and Tanir, Jennifer Y., additional
- Published
- 2016
- Full Text
- View/download PDF
28. Function of copulatory plugs in house mice: mating behavior and paternity outcomes of rival males
- Author
-
Sutter, Andreas, primary, Simmons, Leigh W., additional, Lindholm, Anna K., additional, and Firman, Renée C., additional
- Published
- 2015
- Full Text
- View/download PDF
29. Bedeutung des peripheren Benzodiazepinrezeptors für Proliferation und Apoptose von humanen Speiseröhrenkarzinomen
- Author
-
Sutter, Andreas
- Subjects
mitochondria ,peripheral benzodiazepine receptor ,apoptosis ,cell cycle ,500 Naturwissenschaften und Mathematik::570 Biowissenschaften ,Biologie::570 Biowissenschaften ,Biologie ,esophageal cancer - Abstract
Titel und Inhalt 1 Einleitung 1 1.1 Speiseröhrenkrebs (Ösophaguskarzinom) 1 1.2 Apoptose: der programmierte Zelltod 3 1.3 Zellzyklusregulation 5 1.4 Der periphere Benzodiazepinrezeptor und seine Liganden 5 1.5 Fragestellung 12 2 Material 13 2.1 Antikörper 13 2.2 PCR-Primer 13 2.3 Zellkulturmedien, Zusätze, Chemikalien 14 2.4 Kits 15 3 Methoden 16 3.1 Zellbiologische Methoden 16 3.2 Molekularbiologische Methoden 23 3.3 Proteinchemische Methoden 28 3.4 Statistik 31 4 Ergebnisse 32 4.1 Charakterisierung von Primärzellkulturen humaner Ösophaguskarzinome 32 4.2 PBR-Expression in humanen Ösophaguskarzinomen 32 4.3 Aufnahmekinetiken von NBD-FGIN-1-27 36 4.4 Wachstumsstudien an Ösophaguskarzinom-Zellkulturmodellen 37 4.5 Bestimmung der Zytotoxizität von PBR-Liganden 42 4.6 Apoptoseinduktion durch PBR-Liganden 42 4.7 Zellzyklusuntersuchungen 50 4.8 Modulation extrazellulär regulierter Kinasen durch PBR-Liganden 52 4.9 Transkriptionelle Effekte von PBR-Liganden 55 5 Diskussion 61 5.1 PBR-Liganden als innovative Therapeutika für fortgeschrittene Ösophaguskarzinome 61 5.2 Der PBR, ein antiapoptotisches und proliferationsförderndes Protein 72 5.3 Abschließende Betrachtungen 76 6 Zusammenfassung 77 7 Summary 79 8 Literaturverzeichnis 81 9 Publikationsverzeichnis 95 9.1 Originalarbeiten 95 9.2 Übersichtsarbeiten 95 9.3 Eingereicht zur Veröffentlichung 95 9.4 Vorträge 96 9.5 Kurzveröffentlichungen und Posterabstracts 96 9.6 Auszeichnungen und Preise 99 10 Danksagung 100 11 Lebenslauf 101, Der periphere Benzodiazepinrezeptor (PBR) ist ein mitochondriales, transmembranäres Protein. Es ist mit dem permeability transition pore complex assoziiert, der eine Bedeutung für die Induktion mitochondrialer Apoptosesignalwege besitzt. In verschiedenen Tumorentitäten ist der PBR überexprimiert und besitzt vermutlich eine funktionelle Bedeutung für die Entstehung und Progression der Tumore. Die Modulation des PBR mittels spezifischer, exogener Liganden stellt daher eine Möglichkeit zur Entwicklung neuartiger pharmakologischer Therapiestrategien und zur Aufklärung der Funktion des PBR dar. Ziel dieser Arbeit war es, diesen Ansatz am Beispiel des Ösophaguskarzinoms zu untersuchen, das für seine sehr schlechte Prognose bekannt ist und dessen chemotherapeutische Behandlungsmöglichkeiten bisher unbefriedigend sind. Hierzu wurden Experimente an zwei Zelllinien der beiden histologischen Typen des Ösophaguskarzinoms, des Plattenepithel- und des Adenokarzinoms, sowie an Primärzellkulturen von humanen Ösophaguskarzinomen durchgeführt. Bei den Zelllinien KYSE-140 (Plattenepithel-) und OE-33 (Adenokarzinom) sowie allen Primärzellkulturen und auch Gewebeschnitten von Ösophaguskarzinomen wurde die Expression des mitochondrialen PBR nachgewiesen. In etwa einem Drittel der untersuchten Schnitte wurde zudem eine Überexpression des PBR im Tumorgewebe gezeigt. Der knockdown des PBR mittels antisense-Technologie führte in Ösophaguskarzinomzellen zu einer Wachstumsinhibition. Daher könnte der PBR im Ösophaguskarzinom eine Bedeutung für die Proliferation besitzen. PBR-Liganden hemmten dosis- und zeitabhängig die Proliferation der Ösophaguskarzinomzelllinien. Die Wirkung der Liganden beruhte sowohl auf der Induktion von Apoptose als auch auf einem Zellzyklusarrest am G1/S-Kontrollpunkt. Am Beispiel des PBR-Liganden FGIN-1-27 konnte der Mechanismus der PBR-Ligand-induzierten Apoptose und des Zellzykusarrests gezeigt werden: Zunächst wird der Zusammenbruch des mitochondrialen Membranpotenzials induziert, anschließend die Caspase-3-Aktivierung, die wiederum zur Aktivierung der p38MAPK führt. Dies bewirkt in der Folge zum einen die Fragmentation der DNA, zum anderen vermittelt die p38MAPK-Aktivierung den Zellzyklusarrest am G1/S-Kontrollpunkt. Die antiproliferativen Wirkungen der PBR-Liganden waren mit transkriptionellen Veränderungen Apoptose- und Zellzyklus-relevanter Gene assoziiert: Mittels cDNA-Array-Technologie und semiquantitativer RT-PCR wurde in beiden Ösophaguskarzinomzelllinien nach Behandlung mit PBR-Liganden eine starke Überexpression der growth arrest and DNA-damage-inducible-Gene gadd153 und gadd45 nachgewiesen, die von der Phosphorylierung der p38MAPK abhängig war. Die gadds sind als Apoptoseinduktoren und Regulatoren des Zellzyklus bekannt. Weiterhin wurde eine Aktivierung der ERK1/2 durch PBR-Liganden nachgewiesen. Die Hemmung dieses antiapoptotischen und mitogenen Stimulus führte zu einer überadditiven Steigerung der Apoptoseinduktion und der Zellzyklusarretierung durch PBR-Liganden. Die Aktivierung von ERK1/2 durch PBR-Liganden könnte die Basis für künftige Kombinationstherapien bilden. Der PBR stellt damit eine interessante Zielstruktur für die innovative pharmakologische Therapie von Ösophaguskarzinomen dar. Die mögliche klinische Anwendbarkeit der hier vorgestellten innovativen Therapiekonzepte sollte künftig durch in-vivo- Modelle und klinische Studien evaluiert werden., The periphal benzodiazepine receptor (PBR) is a mitochondrial transmembrane protein. It is associated with the permeability transition pore complex which participates in mitochondrial apoptosis pathways. PBR is overexpressed in various tumor entities and may be of functional relevance for tumorigenesis and tumor progression. Thus, the modulation of PBR by specific exogenous ligands represents a promising strategy for the development of innovative drug therapies and for the elucidation of PBRýs function. The aim of this study was to investigate this approach using esophageal carcinoma as a model, which is known for its very poor prognosis and the lack of curative treatment modalities. Experiments were performed using two established esophageal cancer cell lines representing the two different histologies, squamous cell and adenocarcinoma, as well as primary cell cultures of human esophageal carcinoma. The expression of the mitochondrial PBR was shown both in KYSE-140 (squamous cell) and OE-33 (adenocarcinoma) cell lines, all primary cell cultures, and tissues of esophageal carcinoma. One third of the histological sections displayed an overexpression of PBR in the tumor tissue versus normal mucosa. In KYSE-140 cells, the specific knockdown of PBR by antisense technology led to growth inhibition. Thus, PBR may regulate the proliferation of esophageal cancer cells. PBR ligands were shown to inhibit the proliferation of esophageal cancer cells in a time- and dose-dependent manner. The drug effects were due to an induction of apoptosis and an arrest of the cell cycle at the G1/S checkpoint. The mechanism of PBR-ligand-induced apoptosis and cell cycle arrest was then elucidated: A disruption of the mitochondrial membrane potential precedes and is required for caspase-3 activation elicited by PBR ligands. Caspase-3-activation then leads to p38MAPK activation which in turn induces DNA fragmentation and G1/S cell cycle arrest. The antiproliferative effects of PBR ligands were found to be associated with transcriptional alterations of genes involved in the regulation of apoptosis and cell cycle: Using cDNA microarrays and semi-quantitative RT-PCR, a strong up-regulation of the growth arrest and DNA-damage-inducible genes gadd45 and gadd153 was observed in response to PBR ligands. The expression of gadd genes was shown to be regulated by p38MAPK. Gadd genes are known regulators of apoptosis and cell cycle. Moreover, a PBR-ligand-mediated activation of the mitogenic and anti-apoptotic ERK1/2 was demonstrated. The inhibition of ERK1/2 activation led to an over-additive increase of apoptosis and cell cycle arrest caused by PBR ligands. The activation of ERK1/2 by PBR ligands may help to design combination therapies in the future. In conclusion, PBR represents an interesting target for the innovative pharmacological treatment of esophageal carcinoma. The transfer of these innovative therapeutic concepts to the clinical situation should be evaluated in vivo and in clinical studies in the future.
- Published
- 2003
30. Genotoxicity assessment of peptide/ protein-related biotherapeutics: points to consider before testing.
- Author
-
Thybaud, Veronique, Kasper, Peter, Sobol, Zhanna, Elhajouji, Azeddine, Fellows, Mick, Guerard, Melanie, Lynch, Anthony M., Sutter, Andreas, and Tanir, Jennifer Y.
- Subjects
GENETIC toxicology ,PEPTIDE drugs ,AMINO acids ,BIOCONJUGATES ,ENVIRONMENTAL health ,DECISION trees - Abstract
The ICH S6(R1) recommendations on safety evaluation of biotherapeutics have led to uncertainty in determining what would constitute a cause for concern that would require genotoxicity testing. A Health and Environmental Sciences Institute's Genetic Toxicology Technical Committee Workgroup was formed to review the current practice of genotoxicity assessment of peptide/ protein-related biotherapeutics. There are a number of properties of peptide/protein-related biotherapeutics that distinguish such products from traditional 'small molecule' drugs and need to be taken into consideration when assessing whether genotoxicity testing may be warranted and if so, how to do it appropriately. Case examples were provided by participating companies and decision trees were elaborated to determine whether and when genotoxicity evaluation is needed for peptides containing natural amino acids, non-natural amino acids and other chemical entities and for unconjugated and conjugated proteins. From a scientific point of view, there is no reason for testing peptides containing exclusively natural amino acids irrespective of the manufacturing process. If non-natural amino acids, organic linkers and other non-linker chemical components have already been tested for genotoxicity, there is no need to re-evaluate them when used in different peptide/protein-related biotherapeutics. Unless the peptides have been modified to be able to enter the cells, it is generally more appropriate to evaluate the peptides containing the nonnatural amino acids and other non-linker chemical moieties in vivo where the cleavage products can be formed. For linkers, it is important to determine if exposure to reactive forms are likely to occur and from which origin. When the linkers are anticipated to be potential mutagenic impurities they should be evaluated according to ICH M7. If linkers are expected to be catabolic products, it is recommended to test the entire conjugate in vivo, as this would ensure that the relevant 'free' linker forms stemming from in vivo catabolism are tested. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
31. Inroads to Predict in Vivo Toxicology—An Introduction to the eTOX Project
- Author
-
Briggs, Katharine, primary, Cases, Montserrat, additional, Heard, David J., additional, Pastor, Manuel, additional, Pognan, François, additional, Sanz, Ferran, additional, Schwab, Christof H., additional, Steger-Hartmann, Thomas, additional, Sutter, Andreas, additional, Watson, David K., additional, and Wichard, Jörg D., additional
- Published
- 2012
- Full Text
- View/download PDF
32. Gene therapy for gastric cancer: Is it promising?
- Author
-
Sutter, Andreas P, primary and Fechner, Henry, additional
- Published
- 2006
- Full Text
- View/download PDF
33. A novel approach in the treatment of neuroendocrine gastrointestinal tumors: Additive antiproliferative effects of interferon-γ and meta-iodobenzylguanidine
- Author
-
Höpfner, Michael, primary, Sutter, Andreas P, additional, Huether, Alexander, additional, Ahnert-Hilger, Gudrun, additional, and Scherübl, Hans, additional
- Published
- 2004
- Full Text
- View/download PDF
34. NSAIDs and esophageal cancer
- Author
-
Scherübl, Hans, primary, Sutter, Andreas P, additional, and Zeitz, Martin, additional
- Published
- 2003
- Full Text
- View/download PDF
35. Specific ligands of the peripheral benzodiazepine receptor induce apoptosis and cell cycle arrest in human esophageal cancer cells
- Author
-
Sutter, Andreas, primary, Maaser, Kerstin, additional, Barthel, Bettina, additional, Lampe, Bernd Von, additional, Riecken, Ernst-Otto, additional, Zeitz, Martin, additional, and Scherubl, Hans, additional
- Published
- 2001
- Full Text
- View/download PDF
36. A novel approach in the treatment of neuroendocrine gastrointestinal tumors: Additive antiproliferative effects of interferon-? and meta-iodobenzylguanidine.
- Author
-
Höpfner, Michael, Sutter, Andreas P., Huether, Alexander, Ahnert-Hilger, Gudrun, and Scherübl, Hans
- Subjects
- *
TUMOR suppressor genes , *INTERFERONS , *TUMOR growth , *NEUROENDOCRINE tumors , *GASTROINTESTINAL tumors - Abstract
Background: Therapeutic options to effectively inhibit growth and spread of neuroendocrine gastrointestinal tumors are still limited. As both meta-iodobenzylguanidine (MIBG) and interferon-γ (IFNγ) cause antineoplastic effects in neuroendocrine gastrointestinal tumor cells, we investigated the antiproliferative effects of the combination of IFNγ and non-radiolabeled MIBG in neuroendocrine gut STC-1 and pancreatic carcinoid BON tumor cells. Methods and results: IFNγ receptors were expressed in both models. IFNγ dose- and time-dependently inhibited the growth of both STC-1 and of BON tumor cells with IC50-values of 95 ± 15 U/ml and 135 ± 10 U/ml, respectively. Above 10 U/ml IFNγ induced apoptosis-specific caspase-3 activity in a time-dependent manner in either cell line and caused a dose-dependent arrest in the S-phase of the cell cycle. Furthermore, IFNγ induced cytotoxic effects in NE tumor cells. The NE tumor-targeted drug MIBG is selectively taken up via norepinephrine transporters, thereby specifically inhibiting growth in NE tumor cells. Intriguingly, IFNγ treatment induced an upregulation of norepinephrine transporter expression in neuroendocrine tumors cells, as determined by semiquantitative RT-PCR. Co-application of sub-IC50 concentrations of IFNγ and MIBG led to additive growth inhibitory effects, which were mainly due to increased cytotoxicity and S-phase arrest of the cell cycle. Conclusion: Our data show that IFNγ exerts antiproliferative effects on neuroendocrine gastrointestinal tumor cells by inducing cell cycle arrest, apoptosis and cytotoxicity. The combination of IFNγ with the NE tumor-targeted agent MIBG leads to effective growth control at reduced doses of either drug. Thus, the administration of IFNγ alone and more so, in combination with MIBG, is a promising novel approach in the treatment of neuroendocrine gastrointestinal tumors. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
37. Effect of adventitial VEGF165 gene transfer on vascular thickening after coronary artery balloon injury
- Author
-
Pels, Klaus, Deiner, Carolin, Coupland, Sarah E., Noutsias, Michel, Sutter, Andreas P., Schultheiss, Heinz-Peter, Yla-Herttuala, Seppo, and Schwimmbeck, Peter L.
- Subjects
NEOVASCULARIZATION ,GENE therapy ,VASCULAR endothelium ,GROWTH factors - Abstract
Objective: Experimental studies have provided evidence that neovascularization is an important feature of plaque growth, and angiogenic gene therapy may, therefore, increase plaque growth. This study examined the effect of local (peri)adventitial vascular endothelial growth factor165 (VEGF) gene transfer on vascular thickening after coronary balloon injury. Methods: Two coronary arteries of 15 pigs were subjected to balloon injury followed by either (peri)adventitial VEGF165 or β-galactosidase (LacZ) plasmid/liposome-mediated gene transfer via needle injection catheter. At days 3, 14 and 28, histologic sections of coronary arteries were analyzed. Results: Transferred VEGF165 gene and increased adventitial neovascularization were detected in coronary arteries after balloon injury and VEGF injection. The mean intima+media (I+M) area increased after coronary balloon injury and VEGF (1.13±0.17 and 2.54±0.52 mm
2 ) or LacZ (1.37±0.19 and 2.96±0.41 mm2 ) gene transfer, with no significant difference between both groups at 3 and 28 days, respectively. No significant difference in I+M neovascularization was observed at day 28 between the treatment groups (microvessel area density 0.24±0.08% with VEGF and 0.26±0.14% with LacZ, respectively). I+M endothelial cell proliferation index ranged from 7% to 22% (VEGF) and 18% to 24% (LacZ). Conclusions: Catheter-mediated (peri)adventitial VEGF165 gene transfer induces adventitial neovascularization but not an increase of vascular thickening/I+M growth and vascularization in a porcine model of coronary artery injury. [Copyright &y& Elsevier]- Published
- 2003
- Full Text
- View/download PDF
38. No evidence for female discrimination against male house mice carrying a selfish genetic element
- Author
-
Andreas Sutter, Anna K. Lindholm, University of Zurich, and Sutter, Andreas
- Subjects
0106 biological sciences ,0301 basic medicine ,cryptic female choice ,Biology ,010603 evolutionary biology ,01 natural sciences ,indirect benefits ,10127 Institute of Evolutionary Biology and Environmental Studies ,03 medical and health sciences ,Meiosis ,female preference ,t haplotype ,Mating ,mate choice ,10. No inequality ,Genetics ,Haplotype ,Articles ,Fecundity ,Brood ,030104 developmental biology ,Female sperm storage ,Mate choice ,570 Life sciences ,biology ,590 Animals (Zoology) ,Animal Science and Zoology ,House mice ,1103 Animal Science and Zoology ,segregation distortion - Abstract
Meiotic drivers distort transmission to the next generation in their favor, with detrimental effects on the fitness of their homologues and the rest of the genome. Male carriers of meiotic drivers commonly inflict costs on their mates through genetic incompatibility, reduced fecundity, or biased brood sex ratios. Given these costs, evidence for female discrimination against male carriers is surprisingly rare. One of few examples is the t haplotype in house mice, a meiotic driver that shows strong transmission distortion in males and is typically homozygote lethal. As a consequence, mating between 2 t heterozygous (+/t) mice leads to high embryo mortality. Previous experiments showing that +/t females avoid this incompatibility cost by preferring +/+ versus +/t males have inferred preference based on olfactory cues or brief social interactions. Evidence from mating contexts in laboratory settings and semi-natural populations has been inconclusive. Here, we investigated female choice from a large number of no-choice mating trials. We found no evidence for discrimination against +/t males based on mating, remating, and copulatory behavior. Further, we found no evidence for avoidance of incompatibility through selective interactions between gametes. The likelihood of mating showed significant effects of female weight and genotype, suggesting that our test paradigm enabled females to exhibit mate choice. We discuss the strengths and limitations of our approach. By explicitly considering selection at both the individual and gene level, we argue why precopulatory female discrimination by +/t females may be less evolutionarily stable than discrimination by all females based on postcopulatory mechanisms.
- Published
- 2016
39. Meiotic drive changes sperm precedence patterns in house mice: potential for male alternative mating tactics?
- Author
-
Andreas Sutter, Anna K. Lindholm, University of Zurich, and Sutter, Andreas
- Subjects
0106 biological sciences ,0301 basic medicine ,Male ,Ovulation ,Genotype ,t haplotype ,CASA ,media_common.quotation_subject ,Zoology ,Multi-level selection ,Biology ,Genitalia, Male ,010603 evolutionary biology ,01 natural sciences ,Competition (biology) ,10127 Institute of Evolutionary Biology and Environmental Studies ,03 medical and health sciences ,Mice ,Sexual Behavior, Animal ,Alternative reproductive tactics ,Polyandry ,Animals ,Mating ,Copulatory behaviour ,Sperm competition ,Ecology, Evolution, Behavior and Systematics ,media_common ,Genetics ,urogenital system ,Reproduction ,Sperm ,Spermatozoa ,Selfish genetic element ,Meiosis ,1105 Ecology, Evolution, Behavior and Systematics ,030104 developmental biology ,Meiotic drive ,Haplotypes ,570 Life sciences ,biology ,590 Animals (Zoology) ,Female ,House mice ,Sperm precedence ,Research Article - Abstract
Background With female multiple mating (polyandry), male-male competition extends to after copulation (sperm competition). Males respond to this selective pressure through physiological, morphological and behavioural adaptations. Sperm competitiveness is commonly decreased in heterozygote carriers of male meiotic drivers, selfish genetic elements that manipulate the production of gametes in males. This might give carriers an evolutionary incentive to reduce the risk of sperm competition. Here, we explore this possibility in house mice. Natural populations frequently harbour a well-characterised male driver (t haplotype), which is transmitted to 90 % of heterozygous (+/t) males’ offspring. Previous research demonstrated strong detrimental effects on sperm competitiveness, and suggested that +/t males are particularly disadvantaged against wild type males when first-to-mate. Low paternity success in the first-to-mate role is expected to favour male adaptations that decrease the risk of sperm competition by preventing female remating. Genotype-specific paternity patterns (sperm precedence) could lead to genetically determined alternative reproductive tactics that can spread through gene level selection. Here, we seek confirmation that +/t males are generally disadvantaged when first-to-mate and address whether males of different genotypes differ in reproductive tactics (copulatory and morphological) to maximise individual or driver fitness. Finally, we attempt to explain the mechanistic basis for alternative sperm precedence patterns in this species. Results We confirmed that +/t males are weak sperm competitors when first to mate. When two +/t males competed, the second-to-mate was more successful, which contrasts with first male sperm precedence when wild type males competed. However, we found no differences between male genotypes in reproductive behaviour or morphology that were consistent with alternative reproductive tactics. Sperm of +/+ and +/t males differed with respect to in vitro sperm features. Premature hypermotility in +/t males’ sperm can potentially explain why +/t males are very weak sperm competitors when first-to-mate. Conclusions Our results demonstrate that meiotic drivers can have strong effects on sperm precedence patterns, and may provide a heritable basis for alternative reproductive tactics motivated by reduced sperm competitiveness. We discuss how experimental and evolutionary constraints may help explain why male genotypes did not show the predicted differences. Electronic supplementary material The online version of this article (doi:10.1186/s12862-016-0710-4) contains supplementary material, which is available to authorized users.
- Published
- 2016
40. Function of copulatory plugs in house mice: mating behavior and paternity outcomes of rival males
- Author
-
Renée C. Firman, Leigh W. Simmons, Andreas Sutter, Anna K. Lindholm, University of Zurich, and Sutter, Andreas
- Subjects
0106 biological sciences ,0301 basic medicine ,Ejaculation ,Zoology ,Context (language use) ,Biology ,010603 evolutionary biology ,01 natural sciences ,House mouse ,03 medical and health sciences ,10127 Institute of Evolutionary Biology and Environmental Studies ,Mating ,Sperm competition ,reproductive and urinary physiology ,Ecology, Evolution, Behavior and Systematics ,Ecology ,biology.organism_classification ,Sperm ,030104 developmental biology ,1105 Ecology, Evolution, Behavior and Systematics ,Sexual selection ,570 Life sciences ,biology ,590 Animals (Zoology) ,Animal Science and Zoology ,House mice ,1103 Animal Science and Zoology - Abstract
Polyandry is widespread across animal taxa, and subjects males to intense post-copulatory sexual selection which favors adaptations that enhance a male’s paternity success, either by decreasing the risk of sperm competition and/or by increasing the competitiveness of the ejaculate. Copulatory plugs deposited by males are thought to have evolved in the context of sperm competition. However, experimental studies that assess the function of copulatory plugs remain scarce. Moreover, most studies have used unnatural manipulations, such as ablating plug-producing male glands or interrupting copulations. Here, we investigated whether repeated ejaculation affects plug size in a mammalian model species, the house mouse. When males experience short periods of sexual rest we found that plug size decreased over repeated ejaculations so that time since last ejaculation can be applied as an approximation for plug size. We induced natural variation in plug size arising from variation in male sexual restedness, and investigated the behavior and paternity success of rival males. Male behavior in the offensive mating role (second) was influenced, albeit not significantly, by the sexual restedness of the first male-to-mate, and therefore the size of his plug. However, second males sired a significantly greater proportion of embryos when competing against a male that had recently mated compared to a male that had not. This supports a potential role of the plug in promoting a male's competitive fertilization success when remating occurs, which could be mediated both by delaying female remating and by ensuring efficient sperm transport through the female reproductive tract.
- Published
- 2016
41. Detrimental effects of an autosomal selfish genetic element on sperm competitiveness in house mice
- Author
-
Andreas Sutter, Anna K. Lindholm, University of Zurich, and Sutter, Andreas
- Subjects
0106 biological sciences ,Male ,t haplotype ,genetic incompatibility ,media_common.quotation_subject ,polyandry ,1100 General Agricultural and Biological Sciences ,Biology ,010603 evolutionary biology ,01 natural sciences ,indirect benefits ,General Biochemistry, Genetics and Molecular Biology ,2300 General Environmental Science ,03 medical and health sciences ,Mice ,Sexual Behavior, Animal ,10127 Institute of Evolutionary Biology and Environmental Studies ,1300 General Biochemistry, Genetics and Molecular Biology ,2400 General Immunology and Microbiology ,Animals ,Mating ,Sperm competition ,reproductive and urinary physiology ,Research Articles ,030304 developmental biology ,General Environmental Science ,media_common ,Repetitive Sequences, Nucleic Acid ,Genetics ,0303 health sciences ,Zygote ,General Immunology and Microbiology ,Reproduction ,Haplotype ,General Medicine ,Sperm ,Spermatozoa ,Haplotypes ,570 Life sciences ,biology ,590 Animals (Zoology) ,embryo viability ,Female ,House mice ,segregation distortion ,General Agricultural and Biological Sciences ,Sex ratio - Abstract
Female multiple mating (polyandry) is widespread across many animal taxa and indirect genetic benefits are a major evolutionary force favouring polyandry. An incentive for polyandry arises when multiple mating leads to sperm competition that disadvantages sperm from genetically inferior mates. A reduction in genetic quality is associated with costly selfish genetic elements (SGEs), and studies in invertebrates have shown that males bearing sex ratio distorting SGEs are worse sperm competitors than wild-type males. We used a vertebrate model species to test whether females can avoid an autosomal SGE, thethaplotype, through polyandry. Thethaplotype in house mice exhibits strong drive intheterozygous males by affecting spermatogenesis and is associated with homozygousin uterolethality. We used controlled matings to test the effect of thethaplotype on sperm competitiveness. Regardless of mating order,theterozygous males sired only 11% of zygotes when competing against wild-type males, suggesting a very strong effect of thethaplotype on sperm quality. We provide, to our knowledge, the first substantial evidence that polyandry ameliorates the harmful effects of an autosomal SGE arising through genetic incompatibility. We discuss potential mechanisms in our study species and the broader implications for the benefits of polyandry.
- Published
- 2015
42. Within-ejaculate sperm competition.
- Author
-
Sutter A and Immler S
- Subjects
- Animals, Fertilization, Humans, Male, Models, Biological, Biological Evolution, Reproduction, Spermatozoa physiology
- Abstract
Sperm competition was defined by Geoff Parker 50 years ago as the competition between sperm from two or more males over the fertilization of a set of eggs. Since the publication of his seminal paper, sperm competition has developed into a large field of research, and many aspects are still being discovered. One of the relatively poorly understood aspects is the importance of selection and competition among sperm within the ejaculate of a male. The sheer number of sperm present in a male's ejaculate suggests that the competition among sibling sperm produced by the same male may be intense. In this review, we summarize Parker's theoretical models generating predictions about the evolution of sperm traits under the control of the haploid gamete as opposed to the diploid male. We review the existing evidence of within-ejaculate competition from a wide range of fields and taxa. We also discuss the conceptual and practical hurdles we have been facing to study within-ejaculate sperm competition, and how novel technologies may help in addressing some of the currently open questions. This article is part of the theme issue 'Fifty years of sperm competition'.
- Published
- 2020
- Full Text
- View/download PDF
43. Tyrosine kinase of insulin-like growth factor receptor as target for novel treatment and prevention strategies of colorectal cancer.
- Author
-
Hopfner M, Sutter AP, Huether A, Baradari V, and Scherubl H
- Subjects
- Adenocarcinoma metabolism, Adenocarcinoma pathology, Antibodies, Monoclonal therapeutic use, Antibodies, Monoclonal, Humanized, Antineoplastic Agents therapeutic use, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Apoptosis drug effects, Cell Cycle drug effects, Cell Line, Tumor, Cetuximab, Colorectal Neoplasms metabolism, Colorectal Neoplasms pathology, Cytotoxins therapeutic use, Dose-Response Relationship, Drug, Fatty Acids, Monounsaturated therapeutic use, Fluvastatin, Gene Expression Regulation, Neoplastic drug effects, Humans, Hydroxymethylglutaryl-CoA Reductase Inhibitors therapeutic use, Indoles therapeutic use, L-Lactate Dehydrogenase genetics, L-Lactate Dehydrogenase metabolism, Pyrimidines therapeutic use, Pyrroles therapeutic use, Receptor Protein-Tyrosine Kinases antagonists & inhibitors, Receptor Protein-Tyrosine Kinases genetics, Receptor Protein-Tyrosine Kinases metabolism, Receptor, IGF Type 1 antagonists & inhibitors, Receptor, IGF Type 1 genetics, Receptor, IGF Type 1 metabolism, Adenocarcinoma drug therapy, Adenocarcinoma prevention & control, Colorectal Neoplasms drug therapy, Colorectal Neoplasms prevention & control, Pyrimidines pharmacology, Pyrroles pharmacology, Receptor Protein-Tyrosine Kinases drug effects, Receptor, IGF Type 1 drug effects
- Abstract
Aim: To investigate the antineoplastic potency of the novel insulin-like growth factor 1 receptor (IGF-1R) tyrosine kinase inhibitor (TKI) NVP-AEW541 in cell lines and primary cell cultures of human colorectal cancer (CRC)., Methods: Cells of primary colorectal carcinomas were from 8 patients. Immunostaining and crystal violet staining were used for analysis of growth factor receptor protein expression and detection of cell number changes, respectively. Cytotoxicity was determined by measuring the release of the cytoplasmic enzyme lactate dehydrogenase (LDH). The proportion of apoptotic cells was determined by quantifying the percentage of sub-G1 (hypodiploid) cells. Cell cycle status reflected by the DNA content of the nuclei was detected by flow cytometry., Results: NVP-AEW541 dose-dependently inhibited the proliferation of colorectal carcinoma cell lines and primary cell cultures by inducing apoptosis and cell cycle arrest. Apoptosis was characterized by caspase-3 activation and nuclear degradation. Cell cycle was arrested at the G1/S checkpoint. The NVP-AEW541-mediated cell cycle-related signaling involved the inactivation of Akt and extracellular signal-regulated kinase (ERK) 1/2, the upregulation of the cyclin-dependent kinase inhibitors p21(Waf1/CIP1) and p27(Kip1), and the downregulation of the cell cycle promoter cyclin D1. Moreover, BAX was upregulated during NVP-AEW541-induced apoptosis, whereas Bcl-2 was downregulated. Measurement of LDH release showed that the antineoplastic effect of NVP-AEW541 was not due to general cytotoxicity of the compound. However, augmented antineoplastic effects were observed in combination treatments of NVP-AEW541 with either 5-FU, or the EGFR-antibody cetuximab, or the HMG-CoA-reductase inhibitor fluvastatin., Conclusion: IGF-1R-TK inhibition is a promising novel approach for either mono- or combination treatment strategies of colorectal carcinoma and even for CRC chemoprevention.
- Published
- 2006
- Full Text
- View/download PDF
44. Signaling pathways involved in the inhibition of epidermal growth factor receptor by erlotinib in hepatocellular cancer.
- Author
-
Huether A, Hopfner M, Sutter AP, Baradari V, Schuppan D, and Scherubl H
- Subjects
- Apoptosis, Cell Line, Tumor, DNA, Complementary metabolism, Erlotinib Hydrochloride, Extracellular Signal-Regulated MAP Kinases metabolism, Humans, Insulin-Like Growth Factor I metabolism, Poly A, Antineoplastic Agents pharmacology, Carcinoma, Hepatocellular drug therapy, ErbB Receptors antagonists & inhibitors, Gene Expression Regulation, Neoplastic, Liver Neoplasms drug therapy, Protein Kinase Inhibitors pharmacology, Quinazolines pharmacology
- Abstract
Aim: To examine the underlying mechanisms of erlotinib-induced growth inhibition in hepatocellular carcinoma (HCC)., Methods: Erlotinib-induced alterations in gene expression were evaluated using cDNA array technology; changes in protein expression and/or protein activation due to erlotinib treatment as well as IGF-1-induced EGFR transactivation were investigated using Western blotting., Results: Erlotinib treatment inhibited the mitogen activated protein (MAP)-kinase pathway and signal transducer of activation and transcription (STAT)-mediated signaling which led to an altered expression of apoptosis and cell cycle regulating genes as demonstrated by cDNA array technology. Overexpression of proapoptotic factors like caspases and gadds associated with a down-regulation of antiapoptotic factors like Bcl-2, Bcl-X(L) or jun D accounted for erlotinib's potency to induce apoptosis. Downregulation of cell cycle regulators promoting the G1/S-transition and overexpression of cyclin-dependent kinase inhibitors and gadds contributed to the induction of a G1/G0-arrest in response to erlotinib. Furthermore, we displayed the transactivation of EGFR-mediated signaling by the IGF-1-receptor and showed erlotinib's inhibitory effects on the receptor-receptor cross talk., Conclusion: Our study sheds light on the under-standing of the mechanisms of action of EGFR-TK-inhibition in HCC-cells and thus might facilitate the design of combination therapies that act additively or synergistically. Moreover, our data on the pathways responding to erlotinib treatment could be helpful in predicting the responsiveness of tumors to EGFR-TKIs in the future.
- Published
- 2006
- Full Text
- View/download PDF
45. Effect of adventitial VEGF(165) gene transfer on vascular thickening after coronary artery balloon injury.
- Author
-
Pels K, Deiner C, Coupland SE, Noutsias M, Sutter AP, Schultheiss HP, Yla-Herttuala S, and Schwimmbeck PL
- Subjects
- Animals, Cell Division, Coronary Vessels pathology, Endothelium, Vascular pathology, Injections, Lac Operon, Models, Animal, Neovascularization, Pathologic, Swine, Transfection methods, Angioplasty, Balloon, Coronary adverse effects, Coronary Vessels injuries, Genetic Therapy methods, Vascular Endothelial Growth Factor A genetics
- Abstract
Objective: Experimental studies have provided evidence that neovascularization is an important feature of plaque growth, and angiogenic gene therapy may, therefore, increase plaque growth. This study examined the effect of local (peri)adventitial vascular endothelial growth factor165 (VEGF) gene transfer on vascular thickening after coronary balloon injury., Methods: Two coronary arteries of 15 pigs were subjected to balloon injury followed by either (peri)adventitial VEGF165 or beta-galactosidase (LacZ) plasmid/liposome-mediated gene transfer via needle injection catheter. At days 3, 14 and 28, histologic sections of coronary arteries were analyzed., Results: Transferred VEGF165 gene and increased adventitial neovascularization were detected in coronary arteries after balloon injury and VEGF injection. The mean intima+media (I+M) area increased after coronary balloon injury and VEGF (1.13+/-0.17 and 2.54+/-0.52 mm(2)) or LacZ (1.37+/-0.19 and 2.96+/-0.41 mm(2)) gene transfer, with no significant difference between both groups at 3 and 28 days, respectively. No significant difference in I+M neovascularization was observed at day 28 between the treatment groups (microvessel area density 0.24+/-0.08% with VEGF and 0.26+/-0.14% with LacZ, respectively). I+M endothelial cell proliferation index ranged from 7% to 22% (VEGF) and 18% to 24% (LacZ)., Conclusions: Catheter-mediated (peri)adventitial VEGF165 gene transfer induces adventitial neovascularization but not an increase of vascular thickening/I+M growth and vascularization in a porcine model of coronary artery injury.
- Published
- 2003
- Full Text
- View/download PDF
46. Overexpression of the peripheral benzodiazepine receptor is a relevant prognostic factor in stage III colorectal cancer.
- Author
-
Maaser K, Grabowski P, Sutter AP, Höpfner M, Foss HD, Stein H, Berger G, Gavish M, Zeitz M, and Scherübl H
- Subjects
- Adenocarcinoma secondary, Adenocarcinoma surgery, Adult, Aged, Aged, 80 and over, Case-Control Studies, Colorectal Neoplasms pathology, Colorectal Neoplasms surgery, Disease-Free Survival, Female, Follow-Up Studies, Humans, Immunoenzyme Techniques, Male, Middle Aged, Neoplasm Staging, Prognosis, Survival Rate, Adenocarcinoma metabolism, Colorectal Neoplasms metabolism, Intestinal Mucosa metabolism, Receptors, GABA-A metabolism
- Abstract
Purpose: The peripheral benzodiazepine receptor (PBR) has been implicated in the growth control of colorectal cancer, where PBR-specific ligand-binding is increased 3-4-fold. However, the prognostic relevance of PBR (over) expression has not yet been evaluated in colorectal cancer., Experimental Design: A 5-year follow-up was performed in 116 consecutive patients undergoing surgery for colorectal cancer with regional or distant metastases [Union International Contre le Cancer (UICC) stage III, 59 patients; UICC stage IV, 57 patients]. The monoclonal anti-PBR antibody 8 D7 was used for immunohistochemical examination of paraffin-embedded sections. PBR-specific staining was compared in cancer tissues and normal mucosa. Kaplan-Meier survival curves were calculated., Results: Twenty-eight % of the colorectal cancers strongly overexpressed PBR. The mean survival of patients with stage III cancer was 56.2 +/- 9.2 months with and 86.8 +/- 6.6 months without high overexpression of PBR (P = 0.006). Univariate and multivariate analyses revealed that high PBR overexpression is an independent unfavorable prognostic factor in stage III colorectal cancer. In stage IV, however, the PBR status did not correlate with different survival times., Conclusions: Strong PBR overexpression is a new independent prognostic marker in stage III colorectal cancer. Evaluating PBR overexpression may be useful for stratifying risk and developing risk-adapted strategies of adjuvant therapy.
- Published
- 2002
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.