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Da Silva AC, Akbar TF, Paterson TE, Werner C, Tondera C, Minev IR. Electrically Controlled Click‐Chemistry for Assembly of Bioactive Hydrogels on Diverse Micro‐ and Flexible Electrodes. Macromol Rapid Commun 2022. [DOI: 10.1002/marc.202270068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Clayton Da Silva A, Akbar TF, Paterson TE, Werner C, Tondera C, Minev IR. Electrically Controlled Click-Chemistry for Assembly of Bioactive Hydrogels on Diverse Micro- and Flexible Electrodes. Macromol Rapid Commun 2022; 43:e2200557. [PMID: 35882631 DOI: 10.1002/marc.202200557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Indexed: 11/09/2022]
Abstract
The seamless integration of electronics with living matter requires advanced materials with programmable biological and engineering properties. Here we explore electrochemical methods to assemble semi-synthetic hydrogels directly on electronically conductive surfaces. We polymerize hydrogels consisting of poly (ethylene glycol) (PEG) and heparin building blocks by spatially controlling the click reaction between their thiol and maleimide moieties. The gels are grown as conformal coatings or 2D patterns on ITO, gold, and PtIr. We demonstrate that such coatings significantly influence the electrochemical properties of the metal-electrolyte interface, likely due to space charge effects in the gels. We further highlight a promising route towards engineering and electrically addressable extracellular matrices by printing arrays of gels with binary cell adhesiveness on flexible conductive surfaces. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Aruã Clayton Da Silva
- Department of Automatic Control and Systems Engineering, Faculty of Engineering, University of Sheffield, Sheffield, UK.,Insigneo Institute for in silico Medicine, University of Sheffield, Sheffield, UK
| | | | - Thomas E Paterson
- Department of Automatic Control and Systems Engineering, Faculty of Engineering, University of Sheffield, Sheffield, UK
| | - Carsten Werner
- Leibniz Institute of Polymer Research Dresden, Dresden, Germany
| | - Christoph Tondera
- Department of Automatic Control and Systems Engineering, Faculty of Engineering, University of Sheffield, Sheffield, UK.,Leibniz Institute of Polymer Research Dresden, Dresden, Germany
| | - Ivan R Minev
- Department of Automatic Control and Systems Engineering, Faculty of Engineering, University of Sheffield, Sheffield, UK.,Insigneo Institute for in silico Medicine, University of Sheffield, Sheffield, UK.,Leibniz Institute of Polymer Research Dresden, Dresden, Germany
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Krüger-Genge A, Tondera C, Hauser S, Braune S, Görs J, Roch T, Klopfleisch R, Neffe AT, Lendlein A, Pietzsch J, Jung F. Immunocompatibility and non-thrombogenicity of gelatin-based hydrogels. Clin Hemorheol Microcirc 2021; 77:335-350. [PMID: 33337355 DOI: 10.3233/ch-201028] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Immunocompatibility and non-thrombogenicity are important requirements for biomedical applications such as vascular grafts. Here, gelatin-based hydrogels formed by reaction of porcine gelatin with increasing amounts of lysine diisocyanate ethyl ester were investigated in vitro in this regard. In addition, potential adverse effects of the hydrogels were determined using the "Hen's egg test on chorioallantoic membrane" (HET-CAM) test and a mouse model.The study revealed that the hydrogels were immunocompatible, since complement activation was absent and a substantial induction of reactive oxygen species generating monocytes and neutrophils could not be observed in whole human blood. The density as well as the activation state of adherent thrombocytes was comparable to medical grade polydimethylsiloxane, which was used as reference material. The HET-CAM test confirmed the compatibility of the hydrogels with vessel functionality since no bleedings, thrombotic events, or vessel destructions were observed. Only for the samples synthesized with the highest LDI amount the number of growing blood vessels in the CAM was comparable to controls and significantly higher than for the softer materials. Implantation into mice showed the absence of adverse or toxic effects in spleen, liver, or kidney, and only a mild lymphocytic activation in the form of a follicular hyperplasia in draining lymph nodes (slightly increased after the implantation of the material prepared with the lowest LDI content). These results imply that candidate materials prepared with mid to high amounts of LDI are suitable for the coating of the blood contacting surface of cardiovascular implants.
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Affiliation(s)
- A Krüger-Genge
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany
| | - C Tondera
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.,School of Science, Faculty of Chemistry and Food Chemistry, Technical University Dresden, Dresden, Germany
| | - S Hauser
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - S Braune
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany
| | - J Görs
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany
| | - T Roch
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute - Multifunctional Biomaterials for Medicine, Teltow and Berlin, Germany
| | - R Klopfleisch
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany
| | - A T Neffe
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute - Multifunctional Biomaterials for Medicine, Teltow and Berlin, Germany
| | - A Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute - Multifunctional Biomaterials for Medicine, Teltow and Berlin, Germany.,Institute of Chemistry, University of Potsdam, Potsdam, Germany
| | - J Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.,School of Science, Faculty of Chemistry and Food Chemistry, Technical University Dresden, Dresden, Germany
| | - F Jung
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute - Multifunctional Biomaterials for Medicine, Teltow and Berlin, Germany
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Hauser S, Wodtke R, Tondera C, Wodtke J, Neffe AT, Hampe J, Lendlein A, Löser R, Pietzsch J. Characterization of Tissue Transglutaminase as a Potential Biomarker for Tissue Response toward Biomaterials. ACS Biomater Sci Eng 2019; 5:5979-5989. [PMID: 33405720 DOI: 10.1021/acsbiomaterials.9b01299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Tissue transglutaminase (TGase 2) is proposed to be important for biomaterial-tissue interactions due to its presence and versatile functions in the extracellular environment. TGase 2 catalyzes the cross-linking of proteins through its Ca2+-dependent acyltransferase activity. Moreover, it enhances the interactions between fibronectin and integrins, which in turn mediates the adhesion, migration, and motility of the cells. TGase 2 is also a key player in the pathogenesis of fibrosis. In this study, we investigated whether TGase 2 is present at the biomaterial-tissue interface and might serve as an informative biomarker for the visualization of tissue response toward gelatin-based biomaterials. Two differently cross-linked hydrogels were used, which were obtained by the reaction of gelatin with lysine diisocyanate ethyl ester. The overall expression of TGase 2 by endothelial cells, macrophages, and granulocytes was partly influenced by contact to the hydrogels or their degradation products, although no clear correlation was evidenced. In contrast, the secretion of TGase 2 differed remarkably between the different cells, indicating that it might be involved in the cellular reaction toward gelatin-based hydrogels. The hydrogels were implanted subcutaneously in immunocompetent, hairless SKH1-Elite mice. Ex vivo immunohistochemical analysis of tissue sections over 112 days revealed enhanced expression of TGase 2 around the hydrogels, in particular at days 14 and 21 post-implantation. The incorporation of fluorescently labeled cadaverine derivatives for the detection of active TGase 2 was in accordance with the results of the expression analysis. The presence of an irreversible inhibitor of TGase 2 led to attenuated incorporation of the cadaverines, which verified the catalytic action of TGase 2. Our in vitro and ex vivo results verified TGase 2 as a potential biomarker for tissue response toward gelatin-based hydrogels. In vivo, no TGase 2 activity was detectable, which is mainly attributed to the unfavorable physicochemical properties of the cadaverine probe used.
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Affiliation(s)
- Sandra Hauser
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Robert Wodtke
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Christoph Tondera
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden 01307, Germany
| | - Johanna Wodtke
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Axel T Neffe
- Helmholtz Virtual Institute on Multifunctional Biomaterials for Medicine, Teltow 14513, Germany.,Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Teltow 14513, Germany
| | - Jochen Hampe
- Medical Department 1, University Hospital Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Andreas Lendlein
- Helmholtz Virtual Institute on Multifunctional Biomaterials for Medicine, Teltow 14513, Germany.,Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Teltow 14513, Germany.,Institute of Chemistry, University of Potsdam, Potsdam 14469, Germany
| | - Reik Löser
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany.,Faculty of Chemistry and Food Chemistry, School of Sciences, Technische Universität Dresden, Dresden 01307, Germany
| | - Jens Pietzsch
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany.,Faculty of Chemistry and Food Chemistry, School of Sciences, Technische Universität Dresden, Dresden 01307, Germany
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Tondera C, Akbar TF, Thomas AK, Lin W, Werner C, Busskamp V, Zhang Y, Minev IR. Highly Conductive, Stretchable, and Cell-Adhesive Hydrogel by Nanoclay Doping. Small 2019; 15:e1901406. [PMID: 31025545 DOI: 10.1002/smll.201901406] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/11/2019] [Indexed: 05/25/2023]
Abstract
Electrically conductive materials that mimic physical and biological properties of tissues are urgently required for seamless brain-machine interfaces. Here, a multinetwork hydrogel combining electrical conductivity of 26 S m-1 , stretchability of 800%, and tissue-like elastic modulus of 15 kPa with mimicry of the extracellular matrix is reported. Engineering this unique set of properties is enabled by a novel in-scaffold polymerization approach. Colloidal hydrogels of the nanoclay Laponite are employed as supports for the assembly of secondary polymer networks. Laponite dramatically increases the conductivity of in-scaffold polymerized poly(ethylene-3,4-diethoxy thiophene) in the absence of other dopants, while preserving excellent stretchability. The scaffold is coated with a layer containing adhesive peptide and polysaccharide dextran sulfate supporting the attachment, proliferation, and neuronal differentiation of human induced pluripotent stem cells directly on the surface of conductive hydrogels. Due to its compatibility with simple extrusion printing, this material promises to enable tissue-mimetic neurostimulating electrodes.
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Affiliation(s)
- Christoph Tondera
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Teuku Fawzul Akbar
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
- Leibniz Institute of Polymer Research Dresden (IPF), Max Bergmann Center of Biomaterials Dresden (MBC), Dresden, 01069, Germany
| | - Alvin Kuriakose Thomas
- B CUBE Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Weilin Lin
- B CUBE Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Carsten Werner
- Leibniz Institute of Polymer Research Dresden (IPF), Max Bergmann Center of Biomaterials Dresden (MBC), Dresden, 01069, Germany
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Volker Busskamp
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Yixin Zhang
- B CUBE Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Ivan R Minev
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
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Tondera C, Laube M, Pietzsch J. Insights into binding of S100 proteins to scavenger receptors: class B scavenger receptor CD36 binds S100A12 with high affinity. Amino Acids 2016; 49:183-191. [PMID: 27734162 PMCID: PMC5241339 DOI: 10.1007/s00726-016-2349-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 10/06/2016] [Indexed: 11/29/2022]
Abstract
The EF-hand type calcium-binding protein S100A12 exerts numerous intra- and extracellular functions of (patho)physiological relevance. Therefore, receptors of S100A12 are of high interest for research and clinical applications. Beside the extensively studied receptor for advanced glycation endproducts (RAGE), G-protein coupled receptors and more recently, scavenger receptors are suggested to be putative S100A12 receptors. Own findings and further information from the literature predestined CD36, a class B scavenger receptor, as promising candidate. To substantiate or prove against this hypothesis, this study aimed at investigation of interaction of S100A12 and CD36 on molecular and cellular level by the use of surface plasmon resonance (SPR), radio- and fluorescence-tracer-based cell binding, and cell activation experiments. S100A12 revealed binding affinity to CD36 in the low nanomolar range, essentially, at the CD36 thrombospondin-1 binding site. Additionally, S100A12-mediated translocation of CD36 to the membrane and elevation of both CD36 and peroxisome proliferator-activated receptor γ (PPARγ) expression was observed, which suggest a potential regulatory function of S100A12–CD36 interaction.
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Affiliation(s)
- Christoph Tondera
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.,Department of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, Germany
| | - Markus Laube
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - Jens Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany. .,Department of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, Germany.
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Tondera C, Hauser S, Krüger-Genge A, Jung F, Neffe AT, Lendlein A, Klopfleisch R, Steinbach J, Neuber C, Pietzsch J. Gelatin-based Hydrogel Degradation and Tissue Interaction in vivo: Insights from Multimodal Preclinical Imaging in Immunocompetent Nude Mice. Theranostics 2016; 6:2114-2128. [PMID: 27698944 PMCID: PMC5039684 DOI: 10.7150/thno.16614] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 08/05/2016] [Indexed: 12/11/2022] Open
Abstract
Hydrogels based on gelatin have evolved as promising multifunctional biomaterials. Gelatin is crosslinked with lysine diisocyanate ethyl ester (LDI) and the molar ratio of gelatin and LDI in the starting material mixture determines elastic properties of the resulting hydrogel. In order to investigate the clinical potential of these biopolymers, hydrogels with different ratios of gelatin and diisocyanate (3-fold (G10_LNCO3) and 8-fold (G10_LNCO8) molar excess of isocyanate groups) were subcutaneously implanted in mice (uni- or bilateral implantation). Degradation and biomaterial-tissue-interaction were investigated in vivo (MRI, optical imaging, PET) and ex vivo (autoradiography, histology, serum analysis). Multimodal imaging revealed that the number of covalent net points correlates well with degradation time, which allows for targeted modification of hydrogels based on properties of the tissue to be replaced. Importantly, the degradation time was also dependent on the number of implants per animal. Despite local mechanisms of tissue remodeling no adverse tissue responses could be observed neither locally nor systemically. Finally, this preclinical investigation in immunocompetent mice clearly demonstrated a complete restoration of the original healthy tissue.
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Affiliation(s)
- Christoph Tondera
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Dresden, Germany
- Technische Universität Dresden, Department of Chemistry and Food Chemistry, Dresden, Germany
| | - Sandra Hauser
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Dresden, Germany
| | - Anne Krüger-Genge
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - Friedrich Jung
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”, Teltow and Berlin
| | - Axel T. Neffe
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”, Teltow and Berlin
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”, Teltow and Berlin
| | - Robert Klopfleisch
- Freie Universität Berlin, Institute of Veterinary Pathology, Berlin, Germany
| | - Jörg Steinbach
- Technische Universität Dresden, Department of Chemistry and Food Chemistry, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Christin Neuber
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Dresden, Germany
| | - Jens Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Dresden, Germany
- Technische Universität Dresden, Department of Chemistry and Food Chemistry, Dresden, Germany
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Laube M, Tondera C, Sharma SK, Bechmann N, Pietzsch FJ, Pigorsch A, Köckerling M, Wuest F, Pietzsch J, Kniess T. 2,3-Diaryl-substituted indole based COX-2 inhibitors as leads for imaging tracer development. RSC Adv 2014. [DOI: 10.1039/c4ra05650g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of 2,3-diaryl-substituted indoles containing a fluorine or methoxy group was synthesized via Fischer indole synthesis, McMurry cyclization, or Bischler–Möhlau reaction to identify potential leads for PET radiotracer development.
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Affiliation(s)
- Markus Laube
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Christoph Tondera
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Sai Kiran Sharma
- Department of Oncology
- Cross Cancer Institute
- University of Alberta
- Edmonton, Canada T6G 1Z2
| | - Nicole Bechmann
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Franz-Jacob Pietzsch
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Centre for Translational Bone, Joint, and Soft Tissue Research
| | - Arne Pigorsch
- Department of Inorganic Solid State Chemistry
- Institute of Chemistry
- University of Rostock
- 18059 Rostock, Germany
| | - Martin Köckerling
- Department of Inorganic Solid State Chemistry
- Institute of Chemistry
- University of Rostock
- 18059 Rostock, Germany
| | - Frank Wuest
- Department of Oncology
- Cross Cancer Institute
- University of Alberta
- Edmonton, Canada T6G 1Z2
| | - Jens Pietzsch
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Torsten Kniess
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
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Tondera C, Laube M, Wimmer C, Kniess T, Mosch B, Großmann K, Pietzsch J. Visualization of cyclooxygenase-2 using a 2,3-diarylsubstituted indole-based inhibitor and confocal laser induced cryofluorescence microscopy at 20K in melanoma cells in vitro. Biochem Biophys Res Commun 2012; 430:301-6. [PMID: 23146632 DOI: 10.1016/j.bbrc.2012.10.133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Accepted: 10/31/2012] [Indexed: 12/19/2022]
Abstract
This study aimed at visualization of cyclooxygenase-2 (COX-2) protein expression in melanoma cells by confocal laser induced cryofluorescence microscopy using 4-(3-(4-methoxyphenyl)-1H-indol-2-yl)benzene-sulfonamide (C1) representative for a novel class of autofluorescent 2,3-diarylsubstituted indole-based selective COX-2 inhibitors. COX-2 expression was measured in human melanoma cell lines A2058 and MelJuso by immunocytochemistry and immunoblotting. Cellular uptake experiments using varying C1 concentrations down to 0.1 nM (with/without molar excess of celecoxib as control) were performed at 37 °C. Cryofluorescence microscopy was conducted at 20 K. COX-2 protein expression was successfully visualized by C1 in A2058 cells. COX-2-negative MelJuso cells showed no specific accumulation of C1. Control experiments using celecoxib and, additionally, implemented fluorescence spectroscopy confirmed specificity of both cellular uptake and intracellular association of C1. Cryofluorescence microscopy in combination with spectroscopy allowed for visualization of COX-2 protein expression in melanoma cells in vitro using a selective COX-2 inhibitor at very low concentrations.
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Affiliation(s)
- Christoph Tondera
- Institute of Radiopharmacy (From January 2013 Institute of Radiopharmaceutical Cancer Research), Helmholtz-Zentrum Dresden-Rossendorf, Germany
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