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Dal NJK, Schäfer G, Thompson AM, Schmitt S, Redinger N, Alonso-Rodriguez N, Johann K, Ojong J, Wohlmann J, Best A, Koynov K, Zentel R, Schaible UE, Griffiths G, Barz M, Fenaroli F. Π-Π interactions stabilize PeptoMicelle-based formulations of Pretomanid derivatives leading to promising therapy against tuberculosis in zebrafish and mouse models. J Control Release 2023; 354:851-868. [PMID: 36681282 DOI: 10.1016/j.jconrel.2023.01.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 08/30/2022] [Revised: 12/15/2022] [Accepted: 01/14/2023] [Indexed: 01/23/2023]
Abstract
Tuberculosis is the deadliest bacterial disease globally, threatening the lives of millions every year. New antibiotic therapies that can shorten the duration of treatment, improve cure rates, and impede the development of drug resistance are desperately needed. Here, we used polymeric micelles to encapsulate four second-generation derivatives of the antitubercular drug pretomanid that had previously displayed much better in vivo activity against Mycobacterium tuberculosis than pretomanid itself. Because these compounds were relatively hydrophobic and had limited bioavailability, we expected that their micellar formulations would overcome these limitations, reduce toxicities, and improve therapeutic outcomes. The polymeric micelles were based on polypept(o)ides (PeptoMicelles) and were stabilized in their hydrophobic core by π-π interactions, allowing the efficient encapsulation of aromatic pretomanid derivatives. The stability of these π-π-stabilized PeptoMicelles was demonstrated in water, blood plasma, and lung surfactant by fluorescence cross-correlation spectroscopy and was further supported by prolonged circulation times of several days in the vasculature of zebrafish larvae. The most efficacious PeptoMicelle formulation tested in the zebrafish larvae infection model almost completely eradicated the bacteria at non-toxic doses. This lead formulation was further assessed against Mycobacterium tuberculosis in the susceptible C3HeB/FeJ mouse model, which develops human-like necrotic granulomas. Following intravenous administration, the drug-loaded PeptoMicelles significantly reduced bacterial burden and inflammatory responses in the lungs and spleens of infected mice.
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Affiliation(s)
- Nils-Jørgen K Dal
- Department of Biosciences, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
| | - Gabriela Schäfer
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany; Leiden Academic Center for Drug Research (LACDR), Division of BioTherapeutics, Leiden University, Einsteinweg 55, 2333 CC, Leiden, the Netherlands
| | - Andrew M Thompson
- Auckland Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Sascha Schmitt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Natalja Redinger
- Forschungszentrum Borstel, Leibniz Lungenzentrum, Program Area Infections, Div. Cellular Microbiology; University of Lübeck, Immunochemistry and Biochemical Microbiology, & German Center for Infection Research, partner site Hamburg-Lübeck - Borstel - Riems, 23845 Borstel, Germany
| | | | - Kerstin Johann
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Jessica Ojong
- Forschungszentrum Borstel, Leibniz Lungenzentrum, Program Area Infections, Div. Cellular Microbiology; University of Lübeck, Immunochemistry and Biochemical Microbiology, & German Center for Infection Research, partner site Hamburg-Lübeck - Borstel - Riems, 23845 Borstel, Germany
| | - Jens Wohlmann
- Department of Biosciences, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
| | - Andreas Best
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Rudolf Zentel
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Ulrich E Schaible
- Forschungszentrum Borstel, Leibniz Lungenzentrum, Program Area Infections, Div. Cellular Microbiology; University of Lübeck, Immunochemistry and Biochemical Microbiology, & German Center for Infection Research, partner site Hamburg-Lübeck - Borstel - Riems, 23845 Borstel, Germany
| | - Gareth Griffiths
- Department of Biosciences, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
| | - Matthias Barz
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany; Leiden Academic Center for Drug Research (LACDR), Division of BioTherapeutics, Leiden University, Einsteinweg 55, 2333 CC, Leiden, the Netherlands.
| | - Federico Fenaroli
- Department of Biosciences, University of Oslo, Blindernveien 31, 0371 Oslo, Norway; Department of Chemistry, Bioscience and Environmental Engineering, University of Stavanger, 4021 Stavanger, Norway.
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Shalgunov V, Hvass L, Jørgensen J, Poulie C, Johann K, Barz M, Kjær A, Herth M. Extracorporeal clearing traps based on tetrazine ligation for pretargeted therapy and diagnostics. Nucl Med Biol 2022. [DOI: 10.1016/s0969-8051(22)00435-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Knudsen Dal NJ, Speth M, Johann K, Barz M, Beauvineau C, Wohlmann J, Fenaroli F, Gicquel B, Griffiths G, Alonso-Rodriguez N. The zebrafish embryo as an in vivo model for screening nanoparticle-formulated lipophilic anti-tuberculosis compounds. Dis Model Mech 2022; 15:dmm049147. [PMID: 34842273 PMCID: PMC8807572 DOI: 10.1242/dmm.049147] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 11/16/2021] [Indexed: 11/20/2022] Open
Abstract
With the increasing emergence of drug-resistant Mycobacterium tuberculosis strains, new and effective antibiotics against tuberculosis (TB) are urgently needed. However, the high frequency of poorly water-soluble compounds among hits in high-throughput drug screening campaigns is a major obstacle in drug discovery. Moreover, in vivo testing using conventional animal TB models, such as mice, is time consuming and costly, and represents a major bottleneck in lead compound discovery and development. Here, we report the use of the zebrafish embryo TB model for evaluating the in vivo toxicity and efficacy of five poorly water-soluble nitronaphthofuran derivatives, which were recently identified as possessing anti-TB activity in vitro. To aid solubilization, compounds were formulated in biocompatible polymeric micelles (PMs). Three of the five PM-formulated nitronaphthofuran derivatives showed low toxicity in vivo, significantly reduced bacterial burden and improved survival in infected zebrafish embryos. We propose the zebrafish embryo TB-model as a quick and sensitive tool for evaluating the in vivo toxicity and efficacy of new anti-TB compounds during early stages of drug development. Thus, this model is well suited for pinpointing promising compounds for further development.
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Affiliation(s)
- Nils-Jørgen Knudsen Dal
- Department Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371 Oslo, Norway
| | - Martin Speth
- Department Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371 Oslo, Norway
| | - Kerstin Johann
- Department of Chemistry, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
| | - Matthias Barz
- Department of Chemistry, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
- Division of BioTherapeutics, Leiden Academic Center for Drug Research (LACDR), Leiden University, 2333 Leiden, The Netherlands
| | - Claire Beauvineau
- Chemical Library Institut Curie/CNRS, CNRS UMR9187, INSERM U1196 and CNRS UMR3666, INSERM U1193, Université Paris-Saclay, F-91405 Orsay, France
| | - Jens Wohlmann
- Department Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371 Oslo, Norway
| | - Federico Fenaroli
- Department Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371 Oslo, Norway
| | - Brigitte Gicquel
- Unité de Génétique Mycobactérienne, Dep Génomes and Génétique, Institute Pasteur, 75015 Paris, France
- Department of Tuberculosis Control and Prevention, Shenzhen Nanshan Center for Chronic Disease Control, 518054 Shenzhen, China
| | - Gareth Griffiths
- Department Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371 Oslo, Norway
| | - Noelia Alonso-Rodriguez
- Department Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371 Oslo, Norway
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Shalgunov V, Engudar G, Bohrmann L, Wharton L, Maskell K, Johann K, Barz M, Schaffer P, Herth MM, Radchenko V. Radiolabeling of a polypeptide polymer for intratumoral delivery of alpha-particle emitter, 225Ac, and beta-particle emitter, 177Lu. Nucl Med Biol 2021; 104-105:11-21. [PMID: 34839209 DOI: 10.1016/j.nucmedbio.2021.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/22/2021] [Accepted: 11/08/2021] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Radiotherapy of cancer requires both alpha- and beta-particle emitting radionuclides, as these radionuclide types are efficient at destroying different types of tumors. Both classes of radionuclides require a vehicle, such as an antibody or a polymer, to be delivered and retained within the tumor. Polyglutamic acid (pGlu) is a polymer that has proven itself effective as a basis of drug-polymer conjugates in the clinic, while its derivatives have been used for pretargeted tumor imaging in a research setup. trans-Cyclooctene (TCO) modified pGlu is suitable for pretargeted imaging or therapy, as well as for intratumoral radionuclide therapy. In all cases, it becomes indirectly radiolabeled via the bioorthogonal click reaction with the tetrazine (Tz) molecule carrying the radionuclide. In this study, we report the radiolabeling of TCO-modified pGlu with either lutetium-177 (177Lu), a beta-particle emitter, or actinium-225 (225Ac), an alpha-particle emitter, using the click reaction between TCO and Tz. METHODS A panel of Tz derivatives containing a metal ion binding chelator (DOTA or macropa) connected to the Tz moiety directly or through a polyethylene glycol (PEG) linker was synthesized and tested for their ability to chelate 177Lu and 225Ac, and click to pGlu-TCO. Radiolabeled 177Lu-pGlu and 225Ac-pGlu were isolated by size exclusion chromatography. The retention of 177Lu or 225Ac by the obtained conjugates was investigated in vitro in human serum. RESULTS All DOTA-modified Tzs efficiently chelated 177Lu resulting in average radiochemical conversions (RCC) of >75%. Isolated radiochemical yields (RCY) for 177Lu-pGlu prepared from 177Lu-Tzs ranged from 31% to 55%. TLC analyses detected <5% unchelated 177Lu for all 177Lu-pGlu preparations over six days in human serum. For 225Ac chelation, optimized RCCs ranged from 61 ± 34% to quantitative for DOTA-Tzs and were quantitative for the macropa-modified Tz (>98%). Isolated radiochemical yields (RCY) for 225Ac-pGlu prepared from 225Ac-Tzs ranged from 28% to 51%. For 3 out of 5 225Ac-pGlu conjugates prepared from DOTA-Tzs, the amount of unchelated 225Ac stayed below 10% over six days in human serum, while 225Ac-pGlu prepared from macropa-Tz showed a steady release of up to 37% 225Ac. CONCLUSION We labeled TCO-modified pGlu polymers with alpha- and beta-emitting radionuclides in acceptable RCYs. All 177Lu-pGlu preparations and some 225Ac-pGlu preparations showed excellent stability in human plasma. Our work shows the potential of pGlu as a vehicle for alpha- and beta-radiotherapy of tumors and demonstrated the usefulness of Tz ligation for indirect radiolabeling.
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Affiliation(s)
- Vladimir Shalgunov
- Department for Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Gokce Engudar
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
| | - Lennart Bohrmann
- Department for Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark; Faculty of Pharmaceutical Sciences, University of British Columbia, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Luke Wharton
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada; Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z, Canada
| | - Keiran Maskell
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada; Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 0A7, Canada
| | - Kerstin Johann
- Department of Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Matthias Barz
- Department of Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany; Division of Biotherapeutics, Leiden Academic Center for Drug Research (LACDR), Einsteinweg 55, 2333CC Leiden, the Netherlands
| | - Paul Schaffer
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada; Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 0A7, Canada; Department of Radiology, University of British Columbia, 2775 Lauret St, Vancouver, BC V5Z 1M9, Canada
| | - Matthias M Herth
- Department for Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark; Department of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark.
| | - Valery Radchenko
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z, Canada.
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5
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Johann K, Bohn T, Shahneh F, Luther N, Birke A, Jaurich H, Helm M, Klein M, Raker VK, Bopp T, Barz M, Becker C. Therapeutic melanoma inhibition by local micelle-mediated cyclic nucleotide repression. Nat Commun 2021; 12:5981. [PMID: 34645812 PMCID: PMC8514514 DOI: 10.1038/s41467-021-26269-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 09/28/2021] [Indexed: 12/03/2022] Open
Abstract
The acidic tumor microenvironment in melanoma drives immune evasion by up-regulating cyclic adenosine monophosphate (cAMP) in tumor-infiltrating monocytes. Here we show that the release of non-toxic concentrations of an adenylate cyclase (AC) inhibitor from poly(sarcosine)-block-poly(L-glutamic acid γ-benzyl ester) (polypept(o)id) copolymer micelles restores antitumor immunity. In combination with selective, non-therapeutic regulatory T cell depletion, AC inhibitor micelles achieve a complete remission of established B16-F10-OVA tumors. Single-cell sequencing of melanoma-infiltrating immune cells shows that AC inhibitor micelles reduce the number of anti-inflammatory myeloid cells and checkpoint receptor expression on T cells. AC inhibitor micelles thus represent an immunotherapeutic measure to counteract melanoma immune escape. The acidic tumour microenvironment in melanoma drives immune evasion by cAMP in tumor-infiltrating monocytes. Here, the authors show that the release of an adenylate cyclase inhibitor from micelles restores antitumor immunity and, when combined with regulatory T cell depletion, leads to remission of established B16-F10-OVA tumors.
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Affiliation(s)
- Kerstin Johann
- Institute of Organic Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Toszka Bohn
- Institute for Immunology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany
| | - Fatemeh Shahneh
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany
| | - Natascha Luther
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany
| | - Alexander Birke
- Institute of Organic Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Henriette Jaurich
- Institute of Organic Chemistry, Johannes Gutenberg University, Mainz, Germany.,Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany
| | - Mark Helm
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany
| | - Matthias Klein
- Institute for Immunology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany
| | - Verena K Raker
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany.,Department of Dermatology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany
| | - Tobias Bopp
- Institute for Immunology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany.
| | - Matthias Barz
- Institute of Organic Chemistry, Johannes Gutenberg University, Mainz, Germany. .,Leiden Academic Center for Drug Research (LACDR), Leiden, Netherlands.
| | - Christian Becker
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg University, Mainz, Germany. .,Department of Dermatology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany.
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6
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Stéen EJ, Jørgensen JT, Johann K, Nørregaard K, Sohr B, Svatunek D, Birke A, Shalgunov V, Edem PE, Rossin R, Seidl C, Schmid F, Robillard MS, Kristensen JL, Mikula H, Barz M, Kjær A, Herth MM. Trans-Cyclooctene-Functionalized PeptoBrushes with Improved Reaction Kinetics of the Tetrazine Ligation for Pretargeted Nuclear Imaging. ACS Nano 2020; 14:568-584. [PMID: 31820928 PMCID: PMC7075664 DOI: 10.1021/acsnano.9b06905] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/10/2019] [Indexed: 05/24/2023]
Abstract
Tumor targeting using agents with slow pharmacokinetics represents a major challenge in nuclear imaging and targeted radionuclide therapy as they most often result in low imaging contrast and high radiation dose to healthy tissue. To address this challenge, we developed a polymer-based targeting agent that can be used for pretargeted imaging and thus separates tumor accumulation from the imaging step in time. The developed targeting agent is based on polypeptide-graft-polypeptoid polymers (PeptoBrushes) functionalized with trans-cyclooctene (TCO). The complementary 111In-labeled imaging agent is a 1,2,4,5-tetrazine derivative, which can react with aforementioned TCO-modified PeptoBrushes in a rapid bioorthogonal ligation. A high degree of TCO loading (up to 30%) was achieved, without altering the physicochemical properties of the polymeric nanoparticle. The highest degree of TCO loading resulted in significantly increased reaction rates (77-fold enhancement) compared to those with small molecule TCO moieties when using lipophilic tetrazines. Based on computer simulations, we hypothesize that this increase is a result of hydrophobic effects and significant rearrangements within the polymer framework, in which hydrophobic patches of TCO moieties are formed. These patches attract lipophilic tetrazines, leading to increased reaction rates in the bioorthogonal ligation. The most reactive system was evaluated as a targeting agent for pretargeted imaging in tumor-bearing mice. After the setup was optimized, sufficient tumor-to-background ratios were achieved as early as 2 h after administration of the tetrazine imaging agent, which further improved at 22 h, enabling clear visualization of CT-26 tumors. These findings show the potential of PeptoBrushes to be used as a pretargeting agent when an optimized dose of polymer is used.
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Affiliation(s)
- E. Johanna
L. Stéen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
- Department
of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Jesper T. Jørgensen
- Department
of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
- Cluster
for Molecular Imaging, Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen Ø, Denmark
| | - Kerstin Johann
- Institute
of Organic Chemistry, Johannes Gutenberg
University, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Kamilla Nørregaard
- Department
of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
- Cluster
for Molecular Imaging, Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen Ø, Denmark
| | - Barbara Sohr
- Institute
of Applied Synthetic Chemistry, Technische
Universität Wien (TU Wien), Getreidemarkt 9, 1060 Vienna, Austria
| | - Dennis Svatunek
- Institute
of Applied Synthetic Chemistry, Technische
Universität Wien (TU Wien), Getreidemarkt 9, 1060 Vienna, Austria
| | - Alexander Birke
- Institute
of Organic Chemistry, Johannes Gutenberg
University, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Vladimir Shalgunov
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
- Cluster
for Molecular Imaging, Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen Ø, Denmark
| | - Patricia E. Edem
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
- Department
of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
- Cluster
for Molecular Imaging, Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen Ø, Denmark
| | - Raffaella Rossin
- Tagworks
Pharmaceuticals, Geert
Grooteplein 10, 6525 GA Nijmegen, The Netherlands
| | - Christine Seidl
- Institute
of Organic Chemistry, Johannes Gutenberg
University, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Friederike Schmid
- Institute
of Physics, Johannes Gutenberg University, Staudingerweg 7-9, D-55099 Mainz, Germany
| | - Marc S. Robillard
- Tagworks
Pharmaceuticals, Geert
Grooteplein 10, 6525 GA Nijmegen, The Netherlands
| | - Jesper L. Kristensen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Hannes Mikula
- Institute
of Applied Synthetic Chemistry, Technische
Universität Wien (TU Wien), Getreidemarkt 9, 1060 Vienna, Austria
| | - Matthias Barz
- Institute
of Organic Chemistry, Johannes Gutenberg
University, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Andreas Kjær
- Department
of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
- Cluster
for Molecular Imaging, Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen Ø, Denmark
| | - Matthias M. Herth
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
- Department
of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
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7
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Johann K, Svatunek D, Seidl C, Rizzelli S, Bauer TA, Braun L, Koynov K, Mikula H, Barz M. Tetrazine- and trans-cyclooctene-functionalised polypept(o)ides for fast bioorthogonal tetrazine ligation. Polym Chem 2020. [DOI: 10.1039/d0py00375a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Tetrazine- and trans-cyclooctene-functionalised polypeptides and polypetoids were prepared by ring-opening polymerisation of N-carboxyanhydrides using the respective functional initiators and shown to react in fast bioorthogonal tetrazine ligations.
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Affiliation(s)
- Kerstin Johann
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - Dennis Svatunek
- Institute of Applied Synthetic Chemistry
- Technische Universität Wien
- 1060 Vienna
- Austria
| | - Christine Seidl
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - Silvia Rizzelli
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - Tobias A. Bauer
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - Lydia Braun
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Hannes Mikula
- Institute of Applied Synthetic Chemistry
- Technische Universität Wien
- 1060 Vienna
- Austria
| | - Matthias Barz
- Department of Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
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8
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Fenaroli F, Repnik U, Xu Y, Johann K, Van Herck S, Dey P, Skjeldal FM, Frei DM, Bagherifam S, Kocere A, Haag R, De Geest BG, Barz M, Russell DG, Griffiths G. Enhanced Permeability and Retention-like Extravasation of Nanoparticles from the Vasculature into Tuberculosis Granulomas in Zebrafish and Mouse Models. ACS Nano 2018; 12:8646-8661. [PMID: 30081622 DOI: 10.1021/acsnano.8b04433] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The enhanced permeability and retention (EPR) effect is the only described mechanism enabling nanoparticles (NPs) flowing in blood to reach tumors by a passive targeting mechanism. Here, using the transparent zebrafish model infected with Mycobacterium marinum we show that an EPR-like process also occurs allowing different types of NPs to extravasate from the vasculature to reach granulomas that assemble during tuberculosis (TB) infection. PEGylated liposomes and other NP types cross endothelial barriers near infection sites within minutes after injection and accumulate close to granulomas. Although ∼100 and 190 nm NPs concentrated most in granulomas, even ∼700 nm liposomes reached these infection sites in significant numbers. We show by confocal microscopy that NPs can concentrate in small aggregates in foci on the luminal side of the endothelium adjacent to the granulomas. These spots are connected to larger foci of NPs on the ablumenal side of these blood vessels. EM analysis suggests that NPs cross the endothelium via the paracellular route. PEGylated NPs also accumulated efficiently in granulomas in a mouse model of TB infection with Mycobacterium tuberculosis, arguing that the zebrafish embryo model can be used to predict NP behavior in mammalian hosts. In earlier studies we and others showed that uptake of NPs by macrophages that are attracted to infection foci is one pathway for NPs to reach TB granulomas. This study reveals that when NPs are designed to avoid macrophage uptake, they can also efficiently target granulomas via an alternative mechanism that resembles EPR.
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Affiliation(s)
- Federico Fenaroli
- Department of Biosciences , University of Oslo , Blindernveien 31 , 0371 Oslo , Norway
| | - Urska Repnik
- Department of Biosciences , University of Oslo , Blindernveien 31 , 0371 Oslo , Norway
| | - Yitian Xu
- Department of Microbiology and Immunology , Cornell University College of Veterinary Medicine , C5 109 VMC, Ithaca , New York 14853 , United States
| | - Kerstin Johann
- Institute for Organic Chemistry , Johannes Gutenberg-University Mainz , Duesbergweg 10-14 , 55099 Mainz , Germany
| | - Simon Van Herck
- Faculty of Pharmaceutical Sciences, Department of Pharmaceutics , Ghent University , Ottergemsesteenweg 460 , 9000 Ghent , Belgium
| | - Pradip Dey
- Institute of Chemistry and Biochemistry-Organic Chemistry , Free University of Berlin , Takustrasse 3 , 14195 Berlin , Germany
| | | | - Dominik M Frei
- Department of Biosciences , University of Oslo , Blindernveien 31 , 0371 Oslo , Norway
| | - Shahla Bagherifam
- Department of Radiation Biology, Institute for Cancer Research , The Norwegian Radium Hospital , Montebello, N-0310 Oslo , Norway
| | - Agnese Kocere
- Department of Biosciences , University of Oslo , Blindernveien 31 , 0371 Oslo , Norway
| | - Rainer Haag
- Institute of Chemistry and Biochemistry-Organic Chemistry , Free University of Berlin , Takustrasse 3 , 14195 Berlin , Germany
| | - Bruno G De Geest
- Faculty of Pharmaceutical Sciences, Department of Pharmaceutics , Ghent University , Ottergemsesteenweg 460 , 9000 Ghent , Belgium
| | - Matthias Barz
- Institute for Organic Chemistry , Johannes Gutenberg-University Mainz , Duesbergweg 10-14 , 55099 Mainz , Germany
| | - David G Russell
- Department of Microbiology and Immunology , Cornell University College of Veterinary Medicine , C5 109 VMC, Ithaca , New York 14853 , United States
| | - Gareth Griffiths
- Department of Biosciences , University of Oslo , Blindernveien 31 , 0371 Oslo , Norway
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Johann K, Eschmann K, Meiser P. Keine klinische Evidenz für ein erhöhtes Blutungsrisiko durch Bromelain bei perioperativem Einsatz. Sportverletz Sportschaden 2011; 25:108-13. [DOI: 10.1055/s-0031-1273307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Pitzen T, Johann K, Steudel WI, Fritsch E. Cervical spondylolisthesis C6-C7 in a young wrestler: case report. Zentralbl Neurochir 2008; 69:96-98. [PMID: 18444222 DOI: 10.1055/s-2007-1004580] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present both the clinical and radiographic data of a 15-year-old boy, suffering from a lytic spondylolisthesis C6-C7 and treated by circumferential fusion.
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Schmidt A, Johann K. Rupturen des M. pectoralis major - Klinische Ergebnisse nach operativer und konservativer Behandlung. Sportverletz Sportschaden 2007; 21:185-9. [DOI: 10.1055/s-2007-963718] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Schmidt A, Johann K, Kunz M. [Operative treatment of ruptures of distal tendon of biceps muscle with a minimally invasive technique using suture anchors--clinical results]. Z Orthop Ihre Grenzgeb 2006; 144:614-8. [PMID: 17187337 DOI: 10.1055/s-2006-942339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
AIM Ruptures of the distal tendon of the biceps muscle should be treated operatively. A minimally invasive technique and the use of suture anchors may decrease the intraoperative risks. But can satisfactory clinical results be achieved? METHOD We present the results of a clinical study. Between 1999 and 2005 nine patients were operated for distal biceps tendon avulsion. A minimally invasive operating technique using a suture anchor was established and the technique is described. Rantanen and Orava's score was used to compare clinical and radiological findings. RESULTS Clinical follow-up was performed at 6 months after operation. In six patients excellent results according to Rantanen and Orava were achieved. No loss of strength was noticed in 6 of 9 cases. Range of motion was unlimited in six patients. In two cases we found heterotopic ossifications. CONCLUSION On the basis of our results we suggest that minimally invasive surgery using a suture anchor should be performed more often. The technique described leads to results that are comparable to those found in the literature.
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Affiliation(s)
- A Schmidt
- Orthopädische Klinik, St. Elisabeth-Klinik Saarlouis, Germany.
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Schmidt A, Akbar M, Kunz M, Johann K. [Olympia participation 6 months after surgical replacement of a cruciate ligament -- optimal rehabilitation of a top athlete]. Sportverletz Sportschaden 2006; 20:43-5. [PMID: 16544216 DOI: 10.1055/s-2006-926590] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We present the medical history of an Olympic wrestler who suffered a rupture of the anterior cruciate ligament. Operative reconstruction of the anterior cruciate ligament was performed using an autogenous semitendinosus-gracilis-tendon-transplant. The operation was followed by an aggressive rehabilitation program set up to meet the individual requirements. Six months later the athlete was able to compete at the 2004 Olympic games in Athens.
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Affiliation(s)
- A Schmidt
- Orthopädische Klinik, St. Elisabeth-Klinik Saarlouis.
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Abstract
BACKGROUND In a retrospective analysis we evaluated the complication rate in 697 patients after cochlear implantation between 1985 and 1995 (366 children, 331 adults; 604 Nucleus, 50 Clarion and 42 other implants). RESULTS Intraoperatively in 74 cases (10.6%) total or partial cochlear obliteration was found, a CSF gusher occurred in 7 cases. Minor complications such as seroma (8 adults), wound infections (14 patients), emphysema, and swelling were successfully treated with conservative methods and drugs. Seven (2.1%) adults showed facial nerve palsy postoperatively with incomplete recovery only in 2 of them (0.6%). No permanent facial nerve palsy was observed in children. Cholesteatoma developed in 18 adults (5.4%), which was treated by revision surgery. CONCLUSIONS In conclusion, cochlear implant surgery is a safe procedure with a low complication rate. However, Cochlear implantation should be performed by well experienced ear surgeons who can properly handle intraoperative and postoperative problems. The patients should be informed about the typical risks of ear surgery including implant removal due to infection or technical defects, facial nerve palsy, vertigo and, especially in adults, increased tinnitus.
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Affiliation(s)
- H G Kempf
- HNO-Klinik der Medizinischen Hochschule Hannover
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Abstract
In a retrospective analysis we evaluated the intra and postoperative complications in children who underwent cochlear implantation between 1984 and 1993 at the Medizinische Hochschule Hannover. The data and records of 366 children were collected and analyzed. Relevant parameters were major complications such as significant infection, intraoperative bleeding, facial nerve injury, implant loss and device failure, as well as lesser complications, including delayed wound healing, chronic pain and vertigo. Late complications such as cholesteatoma or electrode dislocations were also registered. Cases of acute otitis media were managed with conservative treatment. Data presented indicate that cochlear implant surgery in children is a reliable and safe procedure with a low percentage of severe complications. Problems related to ear surgery can occur and should be manageable with standard procedures. Careful operative techniques and sufficient personal experience can help avoid severe post-operative problems.
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Affiliation(s)
- H G Kempf
- Department of Otolaryngology, Medizinische Hochschule Hannover, Germany
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Kempf HG, Johann K, Weber BP, Lenarz T. Complications of cochlear implant surgery in children. Am J Otol 1997; 18:S62-3. [PMID: 9391600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To evaluate the intraoperative problems and postoperative complications in children receiving cochlear implants. STUDY DESIGN A retrospective analysis of the clinical records of 366 children, aged 1 to 14 years, who had received cochlear implants. RESULTS Intraoperatively, obliteration of the cochlea occurred in 66 patients, cochlear dysplasia in 8, and CSF leakage in 7, and nearly 5% of patients had signs of infection in the mucosa of the middle ear. Postoperatively, early complications occurred in 1% to 2.5% of patients: flap complications, electrode dislocation, facial nerve problems, and incorrect insertion of the electrode. Delayed complications included otitis media and stimulation of the facial nerve. CONCLUSION Proper preparation of the implantation site, experienced and well-trained surgeons, and awareness of the operative and postoperative risks are necessary.
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Affiliation(s)
- H G Kempf
- ENT Department, Medizinische Hochschule, Hannover, Germany
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