151
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152
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Affiliation(s)
- Alan H. Cowley
- Department of Chemistry and Biochemistry The University of Texas at Austin Austin, Texas 78712
| | - Viviana Lomelí
- Department of Chemistry and Biochemistry The University of Texas at Austin Austin, Texas 78712
| | - Andreas Voigt
- Department of Chemistry and Biochemistry The University of Texas at Austin Austin, Texas 78712
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153
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154
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155
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Voigt A, Abram U, Strauch P, Kirmse R. An electron paramagnetic resonance study of tetra-n-butylammoniumtetrabromo-nitridorhenate(VI), [(n-C4H9)4N][ReNBr4]. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)05906-9] [Citation(s) in RCA: 12] [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: 11/16/2022]
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156
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157
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Abram U, Braun M, Abram S, Kirmse R, Voigt A. [NBu4][ReNCl4]: Facile synthesis, structure, electron paramagnetic resonance spectroscopy and reactions. ACTA ACUST UNITED AC 1998. [DOI: 10.1039/a705881k] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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158
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159
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Voigt A, Walawalkar MG, Murugavel R, Roesky HW, Parisini E, Lubini P. Organic-Soluble Neutral and Ionic Indium Siloxane Cages: Potential Precursors for Indium-Containing Silicates. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/anie.199722031] [Citation(s) in RCA: 20] [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: 11/11/2022]
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160
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Voigt A, Häfer R, Gruhn B, Zintl F. Expression of CD34 and other haematopoietic antigens on neuroblastoma cells: consequences for autologous bone marrow and peripheral blood stem cell transplantation. J Neuroimmunol 1997; 78:117-26. [PMID: 9307235 DOI: 10.1016/s0165-5728(97)00088-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Autologous peripheral blood stem cells, obtained by CD34+ stem cell selection, are being used with increasing frequency for transplantation in patients with neuroblastoma. Here, we examined the surface membrane antigens of neuroblastoma cells with a panel of hematopoietic monoclonal antibodies (mAbs), including anti-CD34 mAbs, by flow cytometric analysis. We found stronger binding of anti-CD34 mAbs to clonogenic, less differentiated, non-adherent neuroblastoma cells than to adherent neuroblastoma cells. Moreover, the majority of neuroblastoma cell lines shared hematopoietic-associated antigens with all blood cells. Because of these cross-reactions, especially found with the anti-CD34 mAbs 12.8 and ICH3, we have demonstrated that there is a potential risk of cell harvest contamination by circulating neuroblastoma cells during CD34+ stem cell selection.
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Affiliation(s)
- A Voigt
- Department of Haematology, Oncology and Immunology, Children's Hospital, Friedrich-Schiller-University, Jena, Germany.
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161
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Voigt A, Berndt A, Lauterbach H, Carlsohn H, Hüller M, Stiller KJ, Gottschild D, Zintl F. Radioimmunodetection of neuroblastoma cells with I-131-radiolabelled antibodies. Cancer Biother Radiopharm 1997; 12:187-94. [PMID: 10851465 DOI: 10.1089/cbr.1997.12.187] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The murine anti-neuroblastoma monoclonal antibodies 15/7 and 19/1/4 should be tested for specific radiolocalization of neuroblastoma by immunoscintigraphic imaging of this tumour growing in mice. Radioiodination of both antibodies was done by chloramine-T method resulted in an immunoreactivity of 75%. The calculated specific activity varied from 51.1 to 126.2 kBq/microgram IgG. In each case, about 500 kBq of labeled antibodies were intraperitoneally injected into human neuroblastoma (SK-N-MC, SK-PN-DW and IMR 5) xenografted severe complete immunodeficient (SCID) mice. Whole-body scintigraphy was performed daily by a scintiscanner to localize the tumour site. After last scanning principal organs were removed and their I-131-uptake was determined by measuring the impulse rate. The best scintigrams were done with I-131-19/1/4 at the second day after antibody injection. Radioconjugates were accumulated at highest in the tumour at the third day after application of 15/7 and 19/1/4 with a tumour uptake of 0.4 and 2.2 per cent of injected dose per gram (%ID/g), respectively. The 15/7-moAbs was accumulated approximately 9-fold higher in the SK-N-MC and SK-PN-DW grafts than in principal organs, whereas the tumour/non-tumour-ratio of the 19/1/4 moAb was 3:1. The results indicate the efficacy of these two neuroblastoma antibodies in radiolabelling and their usefulness for tumour imaging of neuroblastoma engrafted SCID-mice.
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Affiliation(s)
- A Voigt
- Children's Hospital, Department of Haematology, Oncology and Immunology, Jena, Germany.
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162
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Felsberg R, Blsurock S, Jelonek S, Gelbrich T, Kirmse R, Voigt A, Hey-Hawkins E. Organometallic Molybdenum(V) Complexes with Promary Phosphane Ligands — Syntheses, Spectroscopic Properties, and Crystal Structures of [Cp′MoCl4(PH2R)] (R=2,4,6-Pri3C6H2, Cyclohexyl, Cp′=C5H4Me). ACTA ACUST UNITED AC 1997. [DOI: 10.1002/cber.19971300621] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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163
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Walawalkar MG, Murugavel R, Voigt A, Roesky HW, Schmidt HG. A Novel Molecular Gallium Phosphonate Cage Containing Sandwiched Lithium Ions: Synthesis, Structure, and Reactivity. J Am Chem Soc 1997. [DOI: 10.1021/ja964263y] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mrinalini G. Walawalkar
- Contribution from the Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Ramaswamy Murugavel
- Contribution from the Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Andreas Voigt
- Contribution from the Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Herbert W. Roesky
- Contribution from the Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Hans-Georg Schmidt
- Contribution from the Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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164
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Voigt A, Murugavel R, Montero ML, Wessel H, Liu FQ, Roesky HW, Usón I, Albers T, Parisini E. Soluble Molecular Titanosilicates. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/anie.199710011] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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165
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Voigt A, Murugavel R, Montero ML, Wessel H, Liu FQ, Roesky HW, Usön I, Albers T, Parisini E. Lösliche, molekulare Titanosilicate. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971090919] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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166
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Voigt A, Murugavel R, Roesky HW. Stannasiloxanes with Acyclic, Bicyclic, and Cubic Core Structures: X-ray Crystal Structure of the Bicyclic Compound [RSi(OSnPh2O)3SiR] (R = (2,6-Me2C6H3)NSiMe3). Organometallics 1996. [DOI: 10.1021/om960522g] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Voigt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Ramaswamy Murugavel
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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167
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Schulz S, Voigt A, Roesky HW, Häming L, Herbst-Irmer R. Synthesis of Dimeric Iminoalanes by Oxidative Addition of Azides to (Cp*Al)4: Structural Characterization of (Cp*AlNSitBu3)2 (Cp* = C5Me5). Organometallics 1996. [DOI: 10.1021/om960138j] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephan Schulz
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Andreas Voigt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Ludger Häming
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Regine Herbst-Irmer
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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168
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Murugavel R, Voigt A, Walawalkar MG, Roesky HW. Hetero- and Metallasiloxanes Derived from Silanediols, Disilanols, Silanetriols, and Trisilanols. Chem Rev 1996; 96:2205-2236. [PMID: 11848826 DOI: 10.1021/cr9500747] [Citation(s) in RCA: 428] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ramaswamy Murugavel
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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169
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Ritter U, Winkhofer N, Murugavel R, Voigt A, Stalke D, Roesky HW. Cubic Group 13 Heterosiloxanes with Four Co3(CO)9C Cluster Units as Substituents: Novel Soluble Model Compounds for Synthetic Zeolites Showing Catalytic Activity in Hydroformylation Reactions. J Am Chem Soc 1996. [DOI: 10.1021/ja952986w] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Uwe Ritter
- Contribution from the Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Norbert Winkhofer
- Contribution from the Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Ramaswamy Murugavel
- Contribution from the Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Andreas Voigt
- Contribution from the Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Dietmar Stalke
- Contribution from the Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Herbert W. Roesky
- Contribution from the Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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170
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Voigt A, Murugavel R, Ritter U, Roesky HW. Infrared and 29Si NMR spectroscopic investigations on metallasiloxanes derived from organosilanetriols. J Organomet Chem 1996. [DOI: 10.1016/0022-328x(96)06319-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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171
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Shah SAA, Dorn H, Voigt A, Roesky HW, Parisini E, Schmidt HG, Noltemeyer M. Group 4 Metal Amido Fluorides and Chlorides: Molecular Structures and the First Comparison in Ethylene Polymerization Catalysis. Organometallics 1996. [DOI: 10.1021/om960177v] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Syed A. A. Shah
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Hendrik Dorn
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Andreas Voigt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Emilio Parisini
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Hans-Georg Schmidt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Mathias Noltemeyer
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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172
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Voigt A, Murugavel R, Parisini E, Roesky HW. Synthesis and Structure of Gallium Siloxane Cages: Model Substances for Gallium-Containing Silicates. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/anie.199607481] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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173
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Voigt A, Murugavel R, Parisini E, Roesky HW. Synthese und Struktur von Galliumsiloxankäfigen: Modellsubstanzen für galliumhaltige Silicate. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961080718] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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174
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Murugavel R, Voigt A, Chandrasekhar V, Roesky HW, Schmidt HG, Noltemeyer M. Silanediols Derived from Silanetriols. X-ray Crystal Structures of (2,4,6-Me3C6H2)N(SiMe3)Si(OSiMe3)(OH)2 and (2,4,6-Me3C6H2)N(SiMe3)Si(OSiMe2R)(OH)2 [R = CH2 (2-NH2-3,5-Me2C6H2)]. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/cber.19961290405] [Citation(s) in RCA: 14] [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: 11/07/2022]
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175
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Voigt A, Murugavel R, Chandrasekhar V, Winkhofer N, Roesky HW, Schmidt HG, Usón I. Facile and Rational Route for High-Yield Synthesis of Titanasiloxanes from Aminosilanetriols. Organometallics 1996. [DOI: 10.1021/om950816m] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Voigt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Ramaswamy Murugavel
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Vadapalli Chandrasekhar
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Norbert Winkhofer
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Hans-Georg Schmidt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Isabel Usón
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
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Abstract
We have previously shown that the pseudorabies virus (PrV) glycoproteins gB and gC (former PrV-gII and PrV-gIII) exhibit heparin-binding properties. While PrV-gC functions as the major adsorption protein, the biological role of the heparin-binding properties of PrV-gB are not understood. We used a gC-deleted PrV-mutant, PrV (dlg92/dltk), to analyse the heparin-binding properties of PrV-gB and the biological role of the PrV-gB-protein in adsorption. PrV-gB was the only glycoprotein of this vaccine strain binding to immobilised heparin in in vitro assays. Presence of the gC-protein was not necessary for the interaction of gB with heparin. Soluble heparin also interfered with adsorption of this mutant virus to a similar extent as it blocked adsorption of wild-type PrV (Ka), but it had only a minor inhibitory effect on infectivity of the mutant strain. These results show that PrV-gB interacts specifically with immobilized heparin and heparin-like structures on the cell surface, but this interaction is not required for a productive infection.
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Affiliation(s)
- D Sawitzky
- Institute for Clinical and Experimental Virology, Free University Berlin, Germany.
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177
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Chandrasekhar V, Murugavel R, Voigt A, Roesky HW, Schmidt HG, Noltemeyer M. Cyclic and Polyhedral Aluminosiloxanes with Al2Si2O4, Al4Si2O6, and Al4Si4O12 Frameworks: X-ray Crystal Structures of [(2,4,6-Me3C6H2)N(SiMe3)Si(OAlBu-i)(OAl(Bu-i)2)O]2 and [(2,6-Me2C6H3)N(SiMe3)SiO3Al·C4H8O2]4. Organometallics 1996. [DOI: 10.1021/om950685p] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vadapalli Chandrasekhar
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, FRG
| | - Ramaswamy Murugavel
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, FRG
| | - Andreas Voigt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, FRG
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, FRG
| | - Hans-Georg Schmidt
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, FRG
| | - Mathias Noltemeyer
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, FRG
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178
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Meierhenrich R, Jedicke H, Voigt A, Lange H. The effect of erythropoietin on lactate, pyruvate and excess lactate under physical exercise in dialysis patients. Clin Nephrol 1996; 45:90-7. [PMID: 8846536] [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: 02/02/2023] Open
Abstract
To investigate EPO-induced increase of hemoglobin on energy metabolism plasma concentrations of lactate (L), pyruvate (P) and excess lactate (XL) were determined in ten dialysis patients at rest, immediately after 6 minutes of ergometric exercise as well as after recovery for 15 and 30 min. The investigations were performed before EPO-therapy at a mean Hb = 7.5 +/- 0.9 g/dl and under EPO-therapy at a mean Hb = 10.0 +/- 0.6 g/dl and at a mean Hb = 11.9 +/- 0.8 g/dl. Ten healthy subjects were subjected to the same investigation at Hb = 14.7 +/- 1.1 g/dl. There was a significant rise of L and XL in all patient groups under ergometric exercise. The increase of hemoglobin from 7.5 g/dl to 10.0 g/dl led to significantly (p < 0.01) lower L and XL concentrations immediately after exercise (L = 4.62 vs 3.23 mmol/l, XL = 2.37 vs 1.38 mmol/l). The further decrease of the mean L and XL values (L = 2.88 mmol/l, XL = 1.05 mmol/l) associated with the rise of hemoglobin to 11.9 g/dl could not be confirmed statistically. In contrast to all patient groups, there was no significant rise in XL in the healthy control subjects under physical exercise. The present results make it evident that patients with renal anemia react even to light physical exercise with pronounced tissue hypoxia in contrast to healthy subjects. The increase of the hemoglobin content under the EPO-therapy leads to a marked reduction of the tissue hypoxia and consequently of anaerobic energy production. A further rise of the hemoglobin content above and beyond 10.5 g/dl will have an additional positive effect on oxygen supply only in occasional cases. The comparison with healthy subjects shows that despite a very large degree of normalization of the hemoglobin content, no normalization of energy metabolism can be attained.
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Affiliation(s)
- R Meierhenrich
- Department of Nephrology, Philipps-University of Marburg/Lahn, Germany
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179
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Murugavel R, Böttcher P, Voigt A, Walawalkar MG, Roesky HW, Parisini E, Teichert M, Noltemeyer M. An efficient synthetic route to primary and secondary condensation products of silanetriols starting from (arylamino)trichlorosilanes. Chem Commun (Camb) 1996. [DOI: 10.1039/cc9960002417] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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180
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181
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Hagedorn R, Fuhr G, Lichtwardt-Zinke K, Richter E, Hornung J, Voigt A. Characterisation of cell movement by impedance measurement on fibroblasts grown on perforated Si-membranes. Biochim Biophys Acta 1995; 1269:221-32. [PMID: 7495874 DOI: 10.1016/0167-4889(95)00122-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mouse fibroblasts grown on perforated Si-membranes (pore diameter approximately 10 microns have been studied to clarify cell locomotive ability. The cell motility was microscopically monitored by a time-lapse video system and, simultaneously, the impedance of the growing cells was measured every 5 s. The correlations between observed cell activities and measured impedance events are discussed and classified. The method is sensitive and allows discrimination between signals arising from translocation of single cells and those arising from filopodia activities. Both cell and filopodia motion could be detected. Designs of microdevices fabricated in semiconductor technology are presented.
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Affiliation(s)
- R Hagedorn
- Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, Institut für Biologie, Lehrstuhl für Membranphysiologie, Germany
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182
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183
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Voigt A, Sawitzky D, Zeichhardt H, Habermehl KO. Cellular receptor structures for pseudorabies virus are blocked by antithrombin III. Med Microbiol Immunol 1995; 184:97-103. [PMID: 7500917 DOI: 10.1007/bf00221393] [Citation(s) in RCA: 4] [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
Pseudorabies virus (PrV), an alphaherpesvirus of swine, uses cellular heparan sulfate residues as a receptor for attachment. Interaction of the virus with its receptor is mediated by the envelope glycoprotein C (PrV-gC), a protein with heparin-binding properties. We have previously shown that a region of this protein shows structural similarities to the high-affinity heparin-binding site of the serum protease-inhibitor antithrombin III (ATII). In this publication, we describe the effect of ATIII on interaction of PrV with its cellular receptor. ATIII bound specifically to heparan sulfate residues on the surface of herpesvirus-permissive RK13 cells. Binding of ATIII to RK13 cells interfered with adsorption of radioactively labelled PrV to these cells. Enzymatic treatment using heparinase I (E.C. 4.2.2.7) removed the receptor for PrV as well as the receptor for ATIII. Since amino acids 130-137 of the high affinity heparin-binding site of ATIII show structural similarities to amino acids 134-141 of PrV-gC, both sequences were synthesized as synthetic peptides. Although interaction of the peptide derived from ATIII with heparin was significantly stronger, both peptides interacted specifically with heparin in assays in vitro. These results suggest that PrV and ATIII interact with the same structure on the cellular surface.
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Affiliation(s)
- A Voigt
- Institute for Clinical and Experimental Virology, Free University Berlin, Germany
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184
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Würfel AM, Voigt A, Linke F, Hofmann von Kap-herr S. [New aspects in the treatment of complete and isolated diaphyseal fracture of the forearm in childhood]. Unfallchirurgie 1995; 21:70-6. [PMID: 7770993 DOI: 10.1007/bf02588733] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
From 1984 to 1992 153 children were treated at the pediatric surgical department of the University of Mainz, of whom 19 had fractures of the radius, 9 of the ulna and 125 had a combination of both in the diaphysis of the forearm. Factors like patient's age, type of fracture and therapeutic methods were analyzed. One hundred and forty-one children were treated conservatively, 12 by operation. One hundred and one of these patients were healthy, when discharged (about 8 weeks after accident). Follow-up was possible in 69 cases. We found that occasional a remaining dislocation angle does not impair function: in 65 cases the result was "good" and "very good", but only "moderate" in 4 cases. These 4 children had been treated conservatively by reposition and plaster cast; 2 of these 4 children showed bone reconstruction without dislocation. Twenty-two of the 56 X-ray follow-up's showed persisting dislocation. To prevent functional problems (2 of our cases) it is essential to obtain a very exact reposition of diaphyseal forearm fractures. Therefore we would recommend a more generous indication for operation, preferably using elastic-stable Nancy pins.
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Affiliation(s)
- A M Würfel
- Klinik und Poliklinik für Kinderchirurgie, Johannes-Gutenberg-Universität Mainz
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185
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Abstract
The adhesion of leucocytes to standard microscope slides is low, which severely limits the cell recovery in cytological preparations on such slides. We coated the slides with various polycations with the aim of achieving an electrostatic surface charge which would increase the cell adhesion but would still avoid cell disruption. The adhesion of leucocytes from a K562 myeloid cell suspension and from cerebrospinal fluid was measured on standard slides made of glass and of oxidized polystyrene, and on slides coated with several chemically different cationic polymers. The electrostatic surface charge and the surface tension of these matrices were determined. We found the cell adhesion to be significantly higher on the matrices with a more attractive zeta potential and not to be measurably influenced by the surface tension of the matrices. The results help to improve the cytological preparation technique, especially for suspensions with a low cell content.
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Affiliation(s)
- S Seyfert
- Neurologische Klinik, Klinikum Steglitz, FU Berlin, Germany
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186
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Fuhr G, Müller T, Schnelle T, Hagedorn R, Voigt A, Fiedler S, Arnold WM, Zimmermann U, Wagner B, Heuberger A. Radio-frequency microtools for particle and liver cell manipulation. Naturwissenschaften 1994; 81:528-35. [PMID: 7838216 DOI: 10.1007/bf01139998] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Single particles can be manipulated by applying high frequencies to ultramicro electrode arrays fabricated on planar structures. Heat production can be reduced to the extent that intense electric fields can be applied even to unmodified cell culture media. Animal cells grow normally in the high field (up to 100 kV/m) between such continuously energized multielectrodes. As with laser tweezers [1-3], this technique can capture particles and cells in field traps, generate linear movement, and permit cell cultivation. It can also produce micropatterns of pH gradients, field-cast objects, and control cell adhesion. These microtools may be combined to develop cell separators, microsensors, and controlled-biocompatibility surfaces.
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Affiliation(s)
- G Fuhr
- Institut für Biologie, Humboldt-Universität zu Berlin
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187
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Winkhofer N, Voigt A, Dorn H, Roesky HW, Steiner A, Stalke D, Reller A. Stable Silanetriols as Building Blocks for the Synthesis of Titanasilasesquioxanes?Model Compounds for Titanium-Doped Zeolites. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/anie.199413521] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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188
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Winkhofer N, Voigt A, Dorn H, Roesky HW, Steiner A, Stalke D, Reller A, Reller A. Stabile Silantriole als Synthesebausteine für Titanasilasesquioxane - Modellverbindungen für titandotierte Zeolithe. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061309] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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189
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Abstract
The pseudorabies virus glycoprotein III (PrV-gIII) has been identified previously as the major viral component binding to a heparin-like receptor on the surface of target cells. The amino acid sequence of gIII contains three regions corresponding to consensus sequences for heparin binding. A synthetic peptide corresponding to amino acids 134 to 141 of PrV-gIII bound heparin in a dot blot assay. In contrast, a synthetic peptide derived from amino acids 290-299 of PrV-gIII did not bind heparin. We therefore conclude that the region containing amino acid 134-141 is involved in binding to the heparin-like cellular receptor.
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Affiliation(s)
- D Sawitzky
- Institute for Clinical and Experimental Virology, Free University Berlin, Germany
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190
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Donath E, Kuzmin P, Krabi A, Voigt A. Electrokinetics of structured interfaces with polymer depletion ? a theoretical study. Colloid Polym Sci 1993. [DOI: 10.1007/bf00654852] [Citation(s) in RCA: 21] [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: 10/26/2022]
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191
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Hässler C, Pensl G, Schulz M, Voigt A, Strunk HP. Grain Boundaries in Multicrystalline Silicon. Characterization by Admittance and EBIC Measurements. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/pssa.2211370218] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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192
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Abstract
Neuroblastoma (NB) is a common childhood tumor that originates from neuroblasts of the neural crest. In this paper we will describe the production of murine monoclonal antibodies (mAbs) to human NB cell lines. The hybridomas were selected by ELISA and immunofluorescence for antibody binding to multiple human neuroblastoma cultured cell lines, but not to hematopoietic cells and leukemic cells. The mAbs were characterized in terms of their ability to bind to human cell lines and tissues. The IgG2a and IgG2b mAbs may prove useful in the diagnosis of therapy of neuroblastoma.
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Affiliation(s)
- A Voigt
- Department of Hematology, Immunology and Oncology, Children's Hospital, University of Jena, Germany
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193
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Karch K, Antreasyan D, Bartels HW, Besset D, Bieler C, Bienlein JK, Bizzeti A, Bloom ED, Brock I, Brockmüller K, Cabenda R, Cartacci A, Cavalli-Sforza M, Clare R, Compagnucci A, Conforto G, Cooper S, Cowan R, Coyne D, Engler A, Fairfield K, Folger G, Fridman A, Gaiser J, Gelphman D, Glaser G, Godfrey G, Graaf K, Heimlich FH, Heinsius FH, Hofstadter R, Irion J, Jakubowski Z, Janssen H, Keh S, Kiel T, Kilian H, Kirkbride I, Koiber T, Kobel M, Koch W, König AC, Königsmann K, Kraemer RW, Krüger S, Landi G, Lee S, Leffler S, Lekebusch R, Lesiak T, Litke AM, Lockman W, Lowe S, Lurz B, Marlow D, Marsiske H, Maschmann W, McBride P, Messing F, Metzger WJ, Meyer H, Monteleoni B, Muryn B, Nernst R, Niczyporul B, Nowak G, Peck C, Pelfer PG, Pollock B, Porter FC, Prindle D, Ratoff P, Reidenbach M, Renger B, Rippich C, Scheer M, Schmitt P, Schotanus J, Schütte J, Schwarz A, Sievers D, Skwarnicki T, Stock V, Strauch K, Strohbusch U, Tompkins J, Trost HJ, Uitert B, Walle RT, Vogel H, Voigt A, Volland U, Wachs K, Wacker K, Walk W, Wegener H, Williams DA, Zschorsch P. Analysis of the 33-133-133-1final state in photon-photon collisions. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf01881706] [Citation(s) in RCA: 22] [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: 11/29/2022]
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194
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Voigt A, Thiel O, Williams D, Policova Z, Zingg W, Neumann A. Axisymmetric drop shape analysis (ADSA) applied to protein solutions. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0166-6622(91)80231-c] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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195
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Bednarski P, Siclari F, Voigt A, Demertzis S, Lau G. Use of a computerized closed-loop sodium nitroprusside titration system for antihypertensive treatment after open heart surgery. Crit Care Med 1990; 18:1061-5. [PMID: 2209031 DOI: 10.1097/00003246-199010000-00002] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This study evaluates the clinical applicability of administering sodium nitroprusside by a closed-loop titration system compared with a manually adjusted system. The mean arterial pressure (MAP) was registered every 10 and 30 sec during the first 150 min after open heart surgery in 20 patients (group 1: computer regulation) and in ten patients (group 2: manual regulation). The results (16,343 and 2,912 data points in groups 1 and 2, respectively), were then analyzed in four time frames and five pressure ranges to indicate clinical efficacy. Sixty percent of the measured MAP in both groups was within the desired +/- 10% during the first 10 min. Thereafter until the end of observation, the MAP was maintained within +/- 10% of the desired set-point 90% of the time in group 1 vs. 60% of the time in group 2. One percent and 11% of data points were +/- 20% from the set-point in groups 1 and 2, respectively (p less than .05, chi-square test). The computer-assisted therapy provided better control of MAP, was safe to use, and helped to reduce nursing demands.
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Affiliation(s)
- P Bednarski
- Division of Thoracic and Cardiovascular Surgery, Hannover Medical School, FRG
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196
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Voigt A. [Monoclonal antibodies in research and clinical medicine]. Kinderarztl Prax 1989; 57:479-87. [PMID: 2689756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The development of the hybridoma technology by G. Köhler and C. Milstein in 1975 enables us to produce monoclonal antibodies with desired specificities for the application in many branches of the biological sciences. The following article describes the technique of hybridizing spleen cells from immunized mice with myeloma cells. The resulting hybridoma produce monoclonal antibodies which have been applied in a wide variety of immunoassay methods. They are also useful in the structural analysis and quantification of antigens and have many applications as diagnostic and therapeutic agents for different tumors. There are already several reports of trials in which monoclonal antibodies eliminate neoplastic cells from bone marrow.
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197
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Wachs K, Antreasyan D, Bartels HW, Bieler C, Bienlein JK, Bizzeti A, Bloom ED, Brockmüller K, Cartacci A, Cavalli-Sforza M, Clare R, Compagnucci A, Conforto G, Cooper S, Coyne D, Drews G, Fairfield K, Folger G, Fridman A, Gelphman D, Glaser G, Godfrey G, Graaf K, Heimlich FH, Heinsius FH, Hofstadter R, Irion J, Jakubowski Z, Karch K, Keh S, Kiel T, Kilian H, Kirkbride I, Kobel M, Koch W, König AC, Königsmann K, Krüger S, Landi G, Leffler S, Lekebusch R, Litke AM, Lowe S, Lurz B, Marsiske H, Maschmann W, McBride P, Meyer H, Muryn B, Metzger WJ, Monteleoni B, Niczyporuk B, Nowak G, Peck C, Pegel C, Pelfer PG, Porter FC, Reidenbach M, Scheer M, Schmitt P, Schotanus J, Schütte J, Schwarz A, Selonke F, Sievers D, Skwarnicki T, Stock V, Strauch K, Strohbusch U, Tompkins J, Uitert B, Walle RT, Voigt A, Volland U, Wacker K, Walk W, Wegener H, Williams D. The electron spectrum fromB meson decays. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01565126] [Citation(s) in RCA: 26] [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: 10/25/2022]
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198
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Jakubowski Z, Antreasyan D, Bartels HW, Besset D, Bieler C, Bienlein JK, Bizzeti A, Bloom ED, Brock I, Brockmüller K, Cabenda R, Cartacci A, Cavalli-Sforza M, Clare R, Compagnucci A, Conforto G, Cowan R, Coyne D, Drews G, Engler A, Fairfield K, Folger G, Fridman A, Gaiser J, Gelphman D, Glaser G, Godfrey G, Graaf K, Heimlich FH, Heinsius FH, Hofstadter R, Irion J, Janssen H, Karch K, Keh S, Kiel T, Kilian H, Kirkbride I, Kloiber T, Kobel M, Koch W, König AC, Königsmann K, Kraemer RW, Krüger S, Landi G, Lee R, Leffler S, Lekebusch R, Litke AM, Lockmann W, Lowe S, Lurz B, Marlow D, Marsiske H, Maschmann W, McBride P, Meyer H, Muryn B, Messing F, Metzger WJ, Monteleoni B, Nernst R, Niczyporuk B, Nowak G, Peck C, Pegel C, Pelfer PG, Pollock B, Pols C, Porter FC, Prindle D, Ratoff P, Reidenbach M, Renger B, Rippich C, Scheer M, Schmitt P, Schotanus J, Schütte J, Schwarz A, Selonke F, Sievers D, Skwarnicki T, Stock V, Strauch K, Strohbusch U, Tompkins J, Trost HJ, Uitert B, Walle RT, Vogel H, Voigt A, Volland U, Wachs K, Wacker K, Walk W, Wegener H, Williams D, Zschorsch P. Determination ofГ ee of the Υ(1S) and Υ(2S) resonances, and measurement ofR atW=9.39 GeV. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf01559717] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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199
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Abstract
The limitations of previous linear electrokinetic theories are discussed. A special model of the surface charge distribution, based on the minimum condition of the interfacial electrostatic free energy, is introduced. The model describes the electrophoretic mobility, taking into account the electroosmotic flow through the surface macromolecular layer and the surface conductivity. This nonlinear electrophoretic theory describes experimental data obtained with human erythrocytes. Numerical results for an uniformly distributed space charge are also presented.
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200
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Voigt A, Becker R, Donath E. Streaming potential and streaming current measurements to estimate surface conduction and electric double layer structure of biomaterials. J Biomed Mater Res 1984; 18:317-20. [PMID: 6715396 DOI: 10.1002/jbm.820180308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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