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Fröhlich-Nowoisky J, Bothen N, Backes AT, Weller MG, Pöschl U. Oligomerization and tyrosine nitration enhance the allergenic potential of the birch and grass pollen allergens Bet v 1 and Phl p 5. Front Allergy 2023; 4:1303943. [PMID: 38125293 PMCID: PMC10732249 DOI: 10.3389/falgy.2023.1303943] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Protein modifications such as oligomerization and tyrosine nitration alter the immune response to allergens and may contribute to the increasing prevalence of allergic diseases. In this mini-review, we summarize and discuss relevant findings for the major birch and grass pollen allergens Bet v 1 and Phl p 5 modified with tetranitromethane (laboratory studies), peroxynitrite (physiological processes), and ozone and nitrogen dioxide (environmental conditions). We focus on tyrosine nitration and the formation of protein dimers and higher oligomers via dityrosine cross-linking and the immunological effects studied.
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Affiliation(s)
| | - Nadine Bothen
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Anna T. Backes
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Michael G. Weller
- Division 1.5 - Protein Analysis, Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
| | - Ulrich Pöschl
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
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2
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Völzke JL, Smatty S, Döring S, Ewald S, Oelze M, Fratzke F, Flemig S, Konthur Z, Weller MG. Efficient Purification of Polyhistidine-Tagged Recombinant Proteins Using Functionalized Corundum Particles. BioTech (Basel) 2023; 12:biotech12020031. [PMID: 37218748 DOI: 10.3390/biotech12020031] [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: 04/05/2023] [Revised: 04/26/2023] [Accepted: 04/28/2023] [Indexed: 05/24/2023] Open
Abstract
Immobilized metal affinity chromatography (IMAC) is a popular and valuable method for the affinity purification of polyhistidine-tagged recombinant proteins. However, it often shows practical limitations, which might require cumbersome optimizations, additional polishing, and enrichment steps. Here, we present functionalized corundum particles for the efficient, economical, and fast purification of recombinant proteins in a column-free format. The corundum surface is first derivatized with the amino silane APTES, then EDTA dianhydride, and subsequently loaded with nickel ions. The Kaiser test, well known in solid-phase peptide synthesis, was used to monitor amino silanization and the reaction with EDTA dianhydride. In addition, ICP-MS was performed to quantify the metal-binding capacity. His-tagged protein A/G (PAG), mixed with bovine serum albumin (BSA), was used as a test system. The PAG binding capacity was around 3 mg protein per gram of corundum or 2.4 mg per 1 mL of corundum suspension. Cytoplasm obtained from different E. coli strains was examined as examples of a complex matrix. The imidazole concentration was varied in the loading and washing buffers. As expected, higher imidazole concentrations during loading are usually beneficial when higher purities are desired. Even when higher sample volumes, such as one liter, were used, recombinant protein down to a concentration of 1 µg/mL could be isolated selectively. Comparing the corundum material with standard Ni-NTA agarose beads indicated higher purities of proteins isolated using corundum. His6-MBP-mSA2, a fusion protein consisting of monomeric streptavidin and maltose-binding protein in the cytoplasm of E. coli, was purified successfully. To show that this method is also suitable for mammalian cell culture supernatants, purification of the SARS-CoV-2-S-RBD-His8 expressed in human Expi293F cells was performed. The material cost of the nickel-loaded corundum material (without regeneration) is estimated to be less than 30 cents for 1 g of functionalized support or 10 cents per milligram of isolated protein. Another advantage of the novel system is the corundum particles' extremely high physical and chemical stability. The new material should be applicable in small laboratories and large-scale industrial applications. In summary, we could show that this new material is an efficient, robust, and cost-effective purification platform for the purification of His-tagged proteins, even in challenging, complex matrices and large sample volumes of low product concentration.
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Affiliation(s)
- Jule L Völzke
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Sarah Smatty
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Sarah Döring
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Shireen Ewald
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Marcus Oelze
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Franziska Fratzke
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Sabine Flemig
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Zoltán Konthur
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
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3
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Tannenberg R, Paul M, Röder B, Gande SL, Sreeramulu S, Saxena K, Richter C, Schwalbe H, Swart C, Weller MG. Chemiluminescence Biosensor for the Determination of Cardiac Troponin I (cTnI). Biosensors (Basel) 2023; 13:455. [PMID: 37185530 PMCID: PMC10136549 DOI: 10.3390/bios13040455] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/24/2023] [Accepted: 03/29/2023] [Indexed: 05/17/2023]
Abstract
Cardiac vascular diseases, especially acute myocardial infarction (AMI), are one of the leading causes of death worldwide. Therefore cardio-specific biomarkers such as cardiac troponin I (cTnI) play an essential role in the field of diagnostics. In order to enable rapid and accurate measurement of cTnI with the potential of online measurements, a chemiluminescence-based immunosensor is presented as a proof of concept. A flow cell was designed and combined with a sensitive CMOS camera allowing sensitive optical readout. In addition, a microfluidic setup was established, which achieved selective and quasi-online cTnI determination within ten minutes. The sensor was tested with recombinant cTnI in phosphate buffer and demonstrated cTnI measurements in the concentration range of 2-25 µg/L. With the optimized system, a limit of detection (LoD) of 0.6 µg/L (23 pmol/L) was achieved. Furthermore, the selectivity of the immunosensor was investigated with other recombinant proteins, such as cTnT, and cTnC, at a level of 16 µg/L. No cross-reactivity could be observed. Measurements with diluted blood plasma and serum resulted in an LoD of 60 µg/L (2.4 nmol/L) and 70 µg/L (2.9 nmol/L), respectively.
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Affiliation(s)
- Robert Tannenberg
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Martin Paul
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Bettina Röder
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Santosh L Gande
- Goethe-University Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt am Main, Germany
| | - Sridhar Sreeramulu
- Goethe-University Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt am Main, Germany
| | - Krishna Saxena
- Goethe-University Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt am Main, Germany
| | - Christian Richter
- Goethe-University Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt am Main, Germany
| | - Harald Schwalbe
- Goethe-University Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt am Main, Germany
| | - Claudia Swart
- National Metrology Institute (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
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Tscheuschner G, Ponader M, Raab C, Weider PS, Hartfiel R, Kaufmann JO, Völzke JL, Bosc-Bierne G, Prinz C, Schwaar T, Andrle P, Bäßler H, Nguyen K, Zhu Y, Mey ASJS, Mostafa A, Bald I, Weller MG. Efficient Purification of Cowpea Chlorotic Mottle Virus by a Novel Peptide Aptamer. Viruses 2023; 15:v15030697. [PMID: 36992405 PMCID: PMC10051510 DOI: 10.3390/v15030697] [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: 01/26/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/31/2023] Open
Abstract
The cowpea chlorotic mottle virus (CCMV) is a plant virus explored as a nanotechnological platform. The robust self-assembly mechanism of its capsid protein allows for drug encapsulation and targeted delivery. Additionally, the capsid nanoparticle can be used as a programmable platform to display different molecular moieties. In view of future applications, efficient production and purification of plant viruses are key steps. In established protocols, the need for ultracentrifugation is a significant limitation due to cost, difficult scalability, and safety issues. In addition, the purity of the final virus isolate often remains unclear. Here, an advanced protocol for the purification of the CCMV from infected plant tissue was developed, focusing on efficiency, economy, and final purity. The protocol involves precipitation with PEG 8000, followed by affinity extraction using a novel peptide aptamer. The efficiency of the protocol was validated using size exclusion chromatography, MALDI-TOF mass spectrometry, reversed-phase HPLC, and sandwich immunoassay. Furthermore, it was demonstrated that the final eluate of the affinity column is of exceptional purity (98.4%) determined by HPLC and detection at 220 nm. The scale-up of our proposed method seems to be straightforward, which opens the way to the large-scale production of such nanomaterials. This highly improved protocol may facilitate the use and implementation of plant viruses as nanotechnological platforms for in vitro and in vivo applications.
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Affiliation(s)
- Georg Tscheuschner
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Marco Ponader
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Christopher Raab
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Prisca S Weider
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Reni Hartfiel
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Jan Ole Kaufmann
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, 81675 Munich, Germany
| | - Jule L Völzke
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Gaby Bosc-Bierne
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Carsten Prinz
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | | | - Paul Andrle
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Henriette Bäßler
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Khoa Nguyen
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Yanchen Zhu
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, UK
| | - Antonia S J S Mey
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, UK
| | - Amr Mostafa
- Institute of Chemistry-Physical Chemistry, University of Potsdam, 14476 Potsdam, Germany
| | - Ilko Bald
- Institute of Chemistry-Physical Chemistry, University of Potsdam, 14476 Potsdam, Germany
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
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Reinmuth-Selzle K, Bellinghausen I, Leifke AL, Backes AT, Bothen N, Ziegler K, Weller MG, Saloga J, Schuppan D, Lucas K, Pöschl U, Fröhlich-Nowoisky J. Chemical modification by peroxynitrite enhances TLR4 activation of the grass pollen allergen Phl p 5. Front Allergy 2023; 4:1066392. [PMID: 36873048 PMCID: PMC9975604 DOI: 10.3389/falgy.2023.1066392] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 01/12/2023] [Indexed: 02/17/2023] Open
Abstract
The chemical modification of aeroallergens by reactive oxygen and nitrogen species (ROS/RNS) may contribute to the growing prevalence of respiratory allergies in industrialized countries. Post-translational modifications can alter the immunological properties of proteins, but the underlying mechanisms and effects are not well understood. In this study, we investigate the Toll-like receptor 4 (TLR4) activation of the major birch and grass pollen allergens Bet v 1 and Phl p 5, and how the physiological oxidant peroxynitrite (ONOO-) changes the TLR4 activation through protein nitration and the formation of protein dimers and higher oligomers. Of the two allergens, Bet v 1 exhibited no TLR4 activation, but we found TLR4 activation of Phl p 5, which increased after modification with ONOO- and may play a role in the sensitization against this grass pollen allergen. We attribute the TLR4 activation mainly to the two-domain structure of Phl p 5 which may promote TLR4 dimerization and activation. The enhanced TLR4 signaling of the modified allergen indicates that the ONOO--induced modifications affect relevant protein-receptor interactions. This may lead to increased sensitization to the grass pollen allergen and thus contribute to the increasing prevalence of allergies in the Anthropocene, the present era of globally pervasive anthropogenic influence on the environment.
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Affiliation(s)
| | - Iris Bellinghausen
- Department of Dermatology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Anna Lena Leifke
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Anna T. Backes
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Nadine Bothen
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Kira Ziegler
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Michael G. Weller
- Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
| | - Joachim Saloga
- Department of Dermatology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Detlef Schuppan
- Institute of Translational Immunology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, MA, USA
| | - Kurt Lucas
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Ulrich Pöschl
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
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Beslic D, Tscheuschner G, Renard BY, Weller MG, Muth T. Comprehensive evaluation of peptide de novo sequencing tools for monoclonal antibody assembly. Brief Bioinform 2022; 24:6955273. [PMID: 36545804 PMCID: PMC9851299 DOI: 10.1093/bib/bbac542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/25/2022] [Accepted: 11/10/2022] [Indexed: 12/24/2022] Open
Abstract
Monoclonal antibodies are biotechnologically produced proteins with various applications in research, therapeutics and diagnostics. Their ability to recognize and bind to specific molecule structures makes them essential research tools and therapeutic agents. Sequence information of antibodies is helpful for understanding antibody-antigen interactions and ensuring their affinity and specificity. De novo protein sequencing based on mass spectrometry is a valuable method to obtain the amino acid sequence of peptides and proteins without a priori knowledge. In this study, we evaluated six recently developed de novo peptide sequencing algorithms (Novor, pNovo 3, DeepNovo, SMSNet, PointNovo and Casanovo), which were not specifically designed for antibody data. We validated their ability to identify and assemble antibody sequences on three multi-enzymatic data sets. The deep learning-based tools Casanovo and PointNovo showed an increased peptide recall across different enzymes and data sets compared with spectrum-graph-based approaches. We evaluated different error types of de novo peptide sequencing tools and their performance for different numbers of missing cleavage sites, noisy spectra and peptides of various lengths. We achieved a sequence coverage of 97.69-99.53% on the light chains of three different antibody data sets using the de Bruijn assembler ALPS and the predictions from Casanovo. However, low sequence coverage and accuracy on the heavy chains demonstrate that complete de novo protein sequencing remains a challenging issue in proteomics that requires improved de novo error correction, alternative digestion strategies and hybrid approaches such as homology search to achieve high accuracy on long protein sequences.
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Affiliation(s)
- Denis Beslic
- Corresponding authors: D. Beslic, Robert Koch Institute, ZKI-PH 3, Nordufer 20, 13353 Berlin, Germany. E-mail: ; G. Tscheuschner, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; B.Y. Renard, Hasso Plattner Institute, Digital Engineering Faculty, University of Potsdam, Prof.-Dr.-Helmert-Straße 2-3, 14482 Potsdam, Germany. E-mail: ; M.G. Weller, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; T. Muth, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany. E-mail:
| | - Georg Tscheuschner
- Corresponding authors: D. Beslic, Robert Koch Institute, ZKI-PH 3, Nordufer 20, 13353 Berlin, Germany. E-mail: ; G. Tscheuschner, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; B.Y. Renard, Hasso Plattner Institute, Digital Engineering Faculty, University of Potsdam, Prof.-Dr.-Helmert-Straße 2-3, 14482 Potsdam, Germany. E-mail: ; M.G. Weller, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; T. Muth, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany. E-mail:
| | - Bernhard Y Renard
- Corresponding authors: D. Beslic, Robert Koch Institute, ZKI-PH 3, Nordufer 20, 13353 Berlin, Germany. E-mail: ; G. Tscheuschner, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; B.Y. Renard, Hasso Plattner Institute, Digital Engineering Faculty, University of Potsdam, Prof.-Dr.-Helmert-Straße 2-3, 14482 Potsdam, Germany. E-mail: ; M.G. Weller, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; T. Muth, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany. E-mail:
| | - Michael G Weller
- Corresponding authors: D. Beslic, Robert Koch Institute, ZKI-PH 3, Nordufer 20, 13353 Berlin, Germany. E-mail: ; G. Tscheuschner, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; B.Y. Renard, Hasso Plattner Institute, Digital Engineering Faculty, University of Potsdam, Prof.-Dr.-Helmert-Straße 2-3, 14482 Potsdam, Germany. E-mail: ; M.G. Weller, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; T. Muth, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany. E-mail:
| | - Thilo Muth
- Corresponding authors: D. Beslic, Robert Koch Institute, ZKI-PH 3, Nordufer 20, 13353 Berlin, Germany. E-mail: ; G. Tscheuschner, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; B.Y. Renard, Hasso Plattner Institute, Digital Engineering Faculty, University of Potsdam, Prof.-Dr.-Helmert-Straße 2-3, 14482 Potsdam, Germany. E-mail: ; M.G. Weller, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany. E-mail: ; T. Muth, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany. E-mail:
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7
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Kaufmann JO, Brangsch J, Kader A, Saatz J, Mangarova DB, Zacharias M, Kempf WE, Schwaar T, Ponader M, Adams LC, Möckel J, Botnar RM, Taupitz M, Mägdefessel L, Traub H, Hamm B, Weller MG, Makowski MR. ADAMTS4-specific MR probe to assess aortic aneurysms in vivo using synthetic peptide libraries. Nat Commun 2022; 13:2867. [PMID: 35606349 PMCID: PMC9126943 DOI: 10.1038/s41467-022-30464-8] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 05/03/2022] [Indexed: 11/25/2022] Open
Abstract
The incidence of abdominal aortic aneurysms (AAAs) has substantially increased during the last 20 years and their rupture remains the third most common cause of sudden death in the cardiovascular field after myocardial infarction and stroke. The only established clinical parameter to assess AAAs is based on the aneurysm size. Novel biomarkers are needed to improve the assessment of the risk of rupture. ADAMTS4 (A Disintegrin And Metalloproteinase with ThromboSpondin motifs 4) is a strongly upregulated proteoglycan cleaving enzyme in the unstable course of AAAs. In the screening of a one-bead-one-compound library against ADAMTS4, a low-molecular-weight cyclic peptide is discovered with favorable properties for in vivo molecular magnetic resonance imaging applications. After identification and characterization, it's potential is evaluated in an AAA mouse model. The ADAMTS4-specific probe enables the in vivo imaging-based prediction of aneurysm expansion and rupture.
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Affiliation(s)
- Jan O Kaufmann
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
- Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Str. 2, 12489, Berlin, Germany
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Julia Brangsch
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
- Institute of Animal Welfare, Animal Behavior and Laboratory Animal Science, Freie Universität Berlin, Königsweg 67, Building 21, 14163, Berlin, Germany
| | - Avan Kader
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
- Institute of Biology, Freie Universität Berlin, Königin-Luise-Str. 1-3, 14195, Berlin, Germany
- Department of Radiology, Klinikum rechts der Isar, Technische Universität München (TUM), Ismaninger Straße 22, 81675, Munich, Germany
| | - Jessica Saatz
- Federal Institute for Materials Research and Testing (BAM), Division 1.1 Inorganic Trace Analysis, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Dilyana B Mangarova
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertag-Str. 15, Building 12, 14163, Berlin, Germany
| | - Martin Zacharias
- Center of Functional Protein Assemblies, Technische Universität München (TUM), Ernst-Otto-Fischer-Str. 9, 85748, Garching, Germany
| | - Wolfgang E Kempf
- Department for Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technische Universität München (TUM), 81675, Munich, Germany
| | - Timm Schwaar
- Federal Institute for Materials Research and Testing (BAM), Division 1.0 SAFIA Technologies, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Marco Ponader
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Lisa C Adams
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Jana Möckel
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Rene M Botnar
- King's College London, School of Biomedical Engineering and Imaging Sciences, London, UK
- Wellcome Trust / EPSRC Centre for Medical Engineering, King's College London, London, UK
- BHF Centre of Excellence, King's College London, London, UK
- Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
- Millennium Institute in Intelligent Healthcare Engineering, Santiago de Chile, Campus San Joaquín - Avda.Vicuña Mackenna, 4860, Macul, Santiago, Chile
- St Thomas' Hospital Westminster Bridge Road, London, SE1 7EH, UK
- Denmark Hill Campus, 125 Coldharbour Lane, London, SE5 9NU, UK
| | - Matthias Taupitz
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Lars Mägdefessel
- Department for Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technische Universität München (TUM), 81675, Munich, Germany
| | - Heike Traub
- Federal Institute for Materials Research and Testing (BAM), Division 1.1 Inorganic Trace Analysis, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Bernd Hamm
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Marcus R Makowski
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany.
- Department of Radiology, Klinikum rechts der Isar, Technische Universität München (TUM), Ismaninger Straße 22, 81675, Munich, Germany.
- King's College London, School of Biomedical Engineering and Imaging Sciences, London, UK.
- St Thomas' Hospital Westminster Bridge Road, London, SE1 7EH, UK.
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8
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Reinmuth-Selzle K, Tchipilov T, Backes AT, Tscheuschner G, Tang K, Ziegler K, Lucas K, Pöschl U, Fröhlich-Nowoisky J, Weller MG. Determination of the protein content of complex samples by aromatic amino acid analysis, liquid chromatography-UV absorbance, and colorimetry. Anal Bioanal Chem 2022; 414:4457-4470. [PMID: 35320366 PMCID: PMC9142416 DOI: 10.1007/s00216-022-03910-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 01/10/2022] [Accepted: 01/18/2022] [Indexed: 11/29/2022]
Abstract
Fast and accurate determination of the protein content of a sample is an important and non-trivial task of many biochemical, biomedical, food chemical, pharmaceutical, and environmental research activities. Different methods of total protein determination are used for a wide range of proteins with highly variable properties in complex matrices. These methods usually work reasonably well for proteins under controlled conditions, but the results for non-standard and complex samples are often questionable. Here, we compare new and well-established methods, including traditional amino acid analysis (AAA), aromatic amino acid analysis (AAAA) based on the amino acids phenylalanine and tyrosine, reversed-phase liquid chromatography of intact proteins with UV absorbance measurements at 220 and 280 nm (LC-220, LC-280), and colorimetric assays like Coomassie Blue G-250 dye-binding assay (Bradford) and bicinchoninic acid (BCA) assay. We investigated different samples, including proteins with challenging properties, chemical modifications, mixtures, and complex matrices like air particulate matter and pollen extracts. All methods yielded accurate and precise results for the protein and matrix used for calibration. AAA, AAAA with fluorescence detection, and the LC-220 method yielded robust results even under more challenging conditions (variable analytes and matrices). These methods turned out to be well-suited for reliable determination of the protein content in a wide range of samples, such as air particulate matter and pollen. ![]()
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Affiliation(s)
| | - Teodor Tchipilov
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Anna T. Backes
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - Georg Tscheuschner
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
| | - Kai Tang
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - Kira Ziegler
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - Kurt Lucas
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - Ulrich Pöschl
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | | | - Michael G. Weller
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), 12489 Berlin, Germany
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9
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Lemke N, El-Khatib AH, Tchipilov T, Jakubowski N, Weller MG, Vogl J. Procedure providing SI-traceable results for the calibration of protein standards by sulfur determination and its application on tau. Anal Bioanal Chem 2022; 414:4441-4455. [PMID: 35316347 PMCID: PMC9142460 DOI: 10.1007/s00216-022-03974-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/04/2022] [Accepted: 02/10/2022] [Indexed: 11/20/2022]
Abstract
Quantitative proteomics is a growing research area and one of the most important tools in the life sciences. Well-characterized and quantified protein standards are needed to achieve accurate and reliable results. However, only a limited number of sufficiently characterized protein standards are currently available. To fill this gap, a method for traceable protein quantification using sulfur isotope dilution inductively coupled plasma mass spectrometry (ICP-MS) was developed in this study. Gel filtration and membrane filtration were tested for the separation of non-protein-bound sulfur in the protein solution. Membrane filtration demonstrated a better performance due to the lower workload and the very low sulfur blanks of 11 ng, making it well suited for high-purity proteins such as NIST SRM 927, a bovine serum albumin (BSA). The method development was accomplished with NIST SRM 927e and a commercial avidin. The quantified mass fraction of NIST SRM 927e agreed very well with the certified value and showed similar uncertainties (3.6%) as established methods while requiring less sample preparation and no species-specific standards. Finally, the developed procedure was applied to the tau protein, which is a biomarker for a group of neurodegenerative diseases denoted “tauopathies” including, e.g., Alzheimer’s disease and frontotemporal dementia. For the absolute quantification of tau in the brain of transgenic mice overexpressing human tau, a well-defined calibration standard was needed. Therefore, a pure tau solution was quantified, yielding a protein mass fraction of (0.328 ± 0.036) g/kg, which was confirmed by amino acid analysis.
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Affiliation(s)
- Nora Lemke
- , Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany.,Charité - Universitätsmedizin Berlin, Hessische Str. 3-4, 10115, Berlin, Germany
| | - Ahmed H El-Khatib
- , Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany.,Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Teodor Tchipilov
- , Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | | | - Michael G Weller
- , Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Jochen Vogl
- , Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany.
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10
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Paul M, Tannenberg R, Tscheuschner G, Ponader M, Weller MG. Cocaine Detection by a Laser-Induced Immunofluorometric Biosensor. Biosensors (Basel) 2021; 11:bios11090313. [PMID: 34562903 PMCID: PMC8466613 DOI: 10.3390/bios11090313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/26/2021] [Accepted: 08/28/2021] [Indexed: 12/27/2022]
Abstract
The trafficking of illegal drugs by criminal networks at borders, harbors, or airports is an increasing issue for public health as these routes ensure the main supply of illegal drugs. The prevention of drug smuggling, including the installation of scanners and other analytical devices to detect small traces of drugs within a reasonable time frame, remains a challenge. The presented immunosensor is based on a monolithic affinity column with a large excess of immobilized hapten, which traps fluorescently labeled antibodies as long as the analyte cocaine is absent. In the presence of the drug, some binding sites of the antibody will be blocked, which leads to an immediate breakthrough of the labeled protein, detectable by highly sensitive laser-induced fluorescence with the help of a Peltier-cooled complementary metal-oxide-semiconductor (CMOS) camera. Liquid handling is performed with high-precision syringe pumps and microfluidic chip-based mixing devices and flow cells. The biosensor achieved limits of detection of 7 ppt (23 pM) of cocaine with a response time of 90 s and a total assay time below 3 min. With surface wipe sampling, the biosensor was able to detect 300 pg of cocaine. This immunosensor belongs to the most sensitive and fastest detectors for cocaine and offers near-continuous analyte measurement.
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11
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Abstract
Although peer review is considered one of the main pillars of modern science, experimental methods and protocols seem to be not a rigorous subject of this process in many papers. Commercial equipment, test kits, labeling kits, previously published concepts, and standard protocols are often considered to be not worth a detailed description or validation. Even more disturbing is the extremely biased citation behavior in this context, which sometimes leads to surrogate citations to avoid low-impact journals, preprints, or to indicate traditional practices. This article describes some of these surprising habits and suggests some measures to avoid the most unpleasant effects, which in the long term may undermine the credibility of science as a whole.
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Affiliation(s)
- Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Str. 11, D-12489 Berlin, Germany
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12
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Climent E, Biyikal M, Gröninger D, Weller MG, Martínez‐Máñez R, Rurack K. Multiplexed Detection of Analytes on Single Test Strips with Antibody-Gated Indicator-Releasing Mesoporous Nanoparticles. Angew Chem Int Ed Engl 2020; 59:23862-23869. [PMID: 32894638 PMCID: PMC7756650 DOI: 10.1002/anie.202009000] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/25/2020] [Indexed: 12/28/2022]
Abstract
Rapid testing methods for the use directly at a point of need are expected to unfold their true potential especially when offering adequate capabilities for the simultaneous measurement of multiple analytes of interest. Considering the unique modularity, high sensitivity, and selectivity of antibody‐gated indicator delivery (gAID) systems, a multiplexed assay for three small‐molecule explosives (TATP, TNT, PETN) was thus developed, allowing to detect the analytes simultaneously with a single test strip at lower ppb concentrations in the liquid phase in <5 min using a fluorescence reader or a smartphone for readout. While the TNT and PETN systems were newly developed here, all the three systems also tolerated harsher matrices than buffered aqueous model solutions. Besides a single‐track strip, the outstanding modularity of the hybrid biosensor materials in combination with strip‐patterning technologies allowed us to obtain a multichannel strip in a straightforward manner, offering comparable analytical performance while allowing to be tailored even more to the user's need.
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Affiliation(s)
- Estela Climent
- Bundesanstalt für Materialforschung und -prüfung (BAM)Richard-Willstätter-Str. 1112489BerlinGermany
| | - Mustafa Biyikal
- Bundesanstalt für Materialforschung und -prüfung (BAM)Richard-Willstätter-Str. 1112489BerlinGermany
| | - Delia Gröninger
- Bundesanstalt für Materialforschung und -prüfung (BAM)Richard-Willstätter-Str. 1112489BerlinGermany
| | - Michael G. Weller
- Bundesanstalt für Materialforschung und -prüfung (BAM)Richard-Willstätter-Str. 1112489BerlinGermany
| | - Ramón Martínez‐Máñez
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)Universitat Politècnica de ValènciaUniversitat de ValènciaCamino de Vera, s/n46022ValenciaSpain
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y NanomedicinaUniversitat Politècnica de ValènciaCentro de Investigación Príncipe FelipeC/ Eduardo Primo Yúfera 346012ValenciaSpain
- CIBER de BioingenieríaBiomateriales y Nanomedicina (CIBER-BBN)Spain
| | - Knut Rurack
- Bundesanstalt für Materialforschung und -prüfung (BAM)Richard-Willstätter-Str. 1112489BerlinGermany
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13
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Climent E, Biyikal M, Gröninger D, Weller MG, Martínez‐Máñez R, Rurack K. Multiplex‐Nachweis von Analyten auf einem einzelnen Teststreifen mit Antikörper‐gesteuerten und Indikator freisetzenden mesoporösen Nanopartikeln. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009000] [Citation(s) in RCA: 5] [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: 12/16/2022]
Affiliation(s)
- Estela Climent
- Bundesanstalt für Materialforschung und -prüfung (BAM) Richard-Willstätter-Str. 11 12489 Berlin Deutschland
| | - Mustafa Biyikal
- Bundesanstalt für Materialforschung und -prüfung (BAM) Richard-Willstätter-Str. 11 12489 Berlin Deutschland
| | - Delia Gröninger
- Bundesanstalt für Materialforschung und -prüfung (BAM) Richard-Willstätter-Str. 11 12489 Berlin Deutschland
| | - Michael G. Weller
- Bundesanstalt für Materialforschung und -prüfung (BAM) Richard-Willstätter-Str. 11 12489 Berlin Deutschland
| | - Ramón Martínez‐Máñez
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM) Universitat Politècnica de València Universitat de València Camino de Vera, s/n 46022 Valencia Spanien
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina Universitat Politècnica de València Centro de Investigación Príncipe Felipe C/ Eduardo Primo Yúfera 3 46012 Valencia Spanien
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN) Spanien
| | - Knut Rurack
- Bundesanstalt für Materialforschung und -prüfung (BAM) Richard-Willstätter-Str. 11 12489 Berlin Deutschland
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14
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Ziegler K, Kunert AT, Reinmuth-Selzle K, Leifke AL, Widera D, Weller MG, Schuppan D, Fröhlich-Nowoisky J, Lucas K, Pöschl U. Chemical modification of pro-inflammatory proteins by peroxynitrite increases activation of TLR4 and NF-κB: Implications for the health effects of air pollution and oxidative stress. Redox Biol 2020; 37:101581. [PMID: 32739154 PMCID: PMC7767743 DOI: 10.1016/j.redox.2020.101581] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/10/2020] [Accepted: 05/11/2020] [Indexed: 01/05/2023] Open
Abstract
Environmental pollutants like fine particulate matter can cause adverse health effects through oxidative stress and inflammation. Reactive oxygen and nitrogen species (ROS/RNS) such as peroxynitrite can chemically modify proteins, but the effects of such modifications on the immune system and human health are not well understood. In the course of inflammatory processes, the Toll-like receptor 4 (TLR4) can sense damage-associated molecular patterns (DAMPs). Here, we investigate how the TLR4 response and pro-inflammatory potential of the proteinous DAMPs α-Synuclein (α-Syn), heat shock protein 60 (HSP60), and high-mobility-group box 1 protein (HMGB1), which are relevant in neurodegenerative and cardiovascular diseases, changes upon chemical modification with peroxynitrite. For the peroxynitrite-modified proteins, we found a strongly enhanced activation of TLR4 and the pro-inflammatory transcription factor NF-κB in stable reporter cell lines as well as increased mRNA expression and secretion of the pro-inflammatory cytokines TNF-α, IL-1β, and IL-8 in human monocytes (THP-1). This enhanced activation of innate immunity via TLR4 is mediated by covalent chemical modifications of the studied DAMPs. Our results show that proteinous DAMPs modified by peroxynitrite more potently amplify inflammation via TLR4 activation than the native DAMPs, and provide first evidence that such modifications can directly enhance innate immune responses via a defined receptor. These findings suggest that environmental pollutants and related ROS/RNS may play a role in promoting acute and chronic inflammatory disorders by structurally modifying the body's own DAMPs. This may have important consequences for chronic neurodegenerative, cardiovascular or gastrointestinal diseases that are prevalent in modern societies, and calls for action, to improve air quality and climate in the Anthropocene. Pollutants and oxidative stress can cause protein nitration and oligomerization. Peroxynitrite amplifies inflammatory potential of disease-related proteins in vitro. Chemical modification of damage-associated molecular patterns (DAMPs). Positive feedback of modified DAMPs via pattern recognition receptor (TLR4). Air pollution may promote inflammatory disorders in the Anthropocene.
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Affiliation(s)
- Kira Ziegler
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, 55128, Mainz, Germany
| | - Anna T Kunert
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, 55128, Mainz, Germany
| | | | - Anna Lena Leifke
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, 55128, Mainz, Germany
| | - Darius Widera
- Stem Cell Biology and Regenerative Medicine Group, School of Pharmacy, University of Reading, RG6 6AP, Reading, UK
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
| | - Detlef Schuppan
- Institute of Translational Immunology, University Medical Center of the Johannes Gutenberg University, 55131, Mainz, Germany; Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, MA, 02215, USA
| | | | - Kurt Lucas
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, 55128, Mainz, Germany.
| | - Ulrich Pöschl
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, 55128, Mainz, Germany.
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15
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Juds C, Schmidt J, Weller MG, Lange T, Beck U, Conrad T, Börner HG. Combining Phage Display and Next-Generation Sequencing for Materials Sciences: A Case Study on Probing Polypropylene Surfaces. J Am Chem Soc 2020; 142:10624-10628. [DOI: 10.1021/jacs.0c03482] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Carmen Juds
- Laboratory for Organic Synthesis of Functional Systems, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Germany
| | - Johannes Schmidt
- Functional Materials, Department of Chemistry, Technische Universität Berlin, D-10623 Berlin Germany
| | - Michael G. Weller
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Germany
| | - Thorid Lange
- Surface Modification and Measurement Technology Division, Federal Institute for Materials Research and Testing (BAM), D-12205 Berlin, Germany
| | - Uwe Beck
- Surface Modification and Measurement Technology Division, Federal Institute for Materials Research and Testing (BAM), D-12205 Berlin, Germany
| | - Tim Conrad
- Medical Bioinformatics Division, Department of Mathematics, Freie Universität Berlin, D-14195 Berlin, Germany
| | - Hans G. Börner
- Laboratory for Organic Synthesis of Functional Systems, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany
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16
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Paul M, Weller MG. Antibody Screening by Microarray Technology-Direct Identification of Selective High-Affinity Clones. Antibodies (Basel) 2020; 9:E1. [PMID: 31906477 PMCID: PMC7175374 DOI: 10.3390/antib9010001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 11/01/2019] [Revised: 12/09/2019] [Accepted: 12/11/2019] [Indexed: 01/27/2023] Open
Abstract
The primary screening of hybridoma cells is a time-critical and laborious step during the development of monoclonal antibodies. Often, critical errors occur in this phase, which supports the notion that the generation of monoclonal antibodies with hybridoma technology is difficult to control and hence, a risky venture. We think that it is crucial to improve the screening process to eliminate most of the critical deficits of the conventional approach. With this new microarray-based procedure, several advances could be achieved: Selectivity for excellent binders, high-throughput, reproducible signals, avoidance of misleading avidity (multivalency) effects, and performance of simultaneous competition experiments. The latter can also be used to select clones of desired cross-reactivity properties. In this paper, a model system with two excellent clones against carbamazepine, two weak clones, and blank supernatant containing fetal bovine serum was designed to examine the effectiveness of the new system. The excellent clones could be detected largely independent of the immunoglobulin G (IgG) concentration, which is usually unknown during the clone screening since the determination and subsequent adjustment of the antibody concentration are not feasible in most cases. Furthermore, in this approach, the enrichment, isolation, and purification of IgG for characterization is not necessary. Raw cell culture supernatant can be used directly, even when fetal calf serum (FCS) or other complex media is used. In addition, an improved method for the oriented antibody-immobilization on epoxy-silanized slides is presented. Based on the results of this model system with simulated hybridoma supernatants, we conclude that this approach should be preferable to most other protocols leading to many false positives, causing expensive and lengthy elimination steps to weed out the poor clones.
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Affiliation(s)
| | - Michael G. Weller
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany;
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17
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Costa E, Climent E, Gawlitza K, Wan W, Weller MG, Rurack K. Optimization of analytical assay performance of antibody-gated indicator-releasing mesoporous silica particles. J Mater Chem B 2020; 8:4950-4961. [DOI: 10.1039/d0tb00371a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An in-depth study of the chemical tuning modes of antibody-gated indicator delivery (gAID) systems revealed the importance of size matching, localisation of grafting and loading sequence for obtaining high-performance small-molecule sensor materials.
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Affiliation(s)
- Elena Costa
- Bundesanstalt für Materialforschung und prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Estela Climent
- Bundesanstalt für Materialforschung und prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Kornelia Gawlitza
- Bundesanstalt für Materialforschung und prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Wei Wan
- Bundesanstalt für Materialforschung und prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Michael G. Weller
- Bundesanstalt für Materialforschung und prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Knut Rurack
- Bundesanstalt für Materialforschung und prüfung (BAM)
- D-12489 Berlin
- Germany
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18
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Costa E, Climent E, Ast S, Weller MG, Canning J, Rurack K. Development of a lateral flow test for rapid pyrethroid detection using antibody-gated indicator-releasing hybrid materials. Analyst 2020; 145:3490-3494. [DOI: 10.1039/d0an00319k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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]
Abstract
The employment of type-I pyrethroids for airplane disinfection in recent years underlines the necessity to develop sensing schemes for the rapid detection of these pesticides directly at the point-of-use.
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Affiliation(s)
- Elena Costa
- Bundesanstalt für Materialforschung und – prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Estela Climent
- Bundesanstalt für Materialforschung und – prüfung (BAM)
- D-12489 Berlin
- Germany
| | - Sandra Ast
- Australian Sensing and Identification Systems Pty Ltd
- Sydney
- Australia
| | - Michael G. Weller
- Bundesanstalt für Materialforschung und – prüfung (BAM)
- D-12489 Berlin
- Germany
| | - John Canning
- Interdisciplinary Photonics Laboratories
- School of Electrical & Data Engineering
- University of Technology Sydney
- Sydney
- Australia
| | - Knut Rurack
- Bundesanstalt für Materialforschung und – prüfung (BAM)
- D-12489 Berlin
- Germany
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19
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Liu F, Lakey PSJ, Berkemeier T, Tong H, Kunert AT, Meusel H, Cheng Y, Su H, Fröhlich-Nowoisky J, Lai S, Weller MG, Shiraiwa M, Pöschl U, Kampf CJ. Atmospheric protein chemistry influenced by anthropogenic air pollutants: nitration and oligomerization upon exposure to ozone and nitrogen dioxide. Faraday Discuss 2019; 200:413-427. [PMID: 28574569 DOI: 10.1039/c7fd00005g] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The allergenic potential of airborne proteins may be enhanced via post-translational modification induced by air pollutants like ozone (O3) and nitrogen dioxide (NO2). The molecular mechanisms and kinetics of the chemical modifications that enhance the allergenicity of proteins, however, are still not fully understood. Here, protein tyrosine nitration and oligomerization upon simultaneous exposure of O3 and NO2 were studied in coated-wall flow-tube and bulk solution experiments under varying atmospherically relevant conditions (5-200 ppb O3, 5-200 ppb NO2, 45-96% RH), using bovine serum albumin as a model protein. Generally, more tyrosine residues were found to react via the nitration pathway than via the oligomerization pathway. Depending on reaction conditions, oligomer mass fractions and nitration degrees were in the ranges of 2.5-25% and 0.5-7%, respectively. The experimental results were well reproduced by the kinetic multilayer model of aerosol surface and bulk chemistry (KM-SUB). The extent of nitration and oligomerization strongly depends on relative humidity (RH) due to moisture-induced phase transition of proteins, highlighting the importance of cloud processing conditions for accelerated protein chemistry. Dimeric and nitrated species were major products in the liquid phase, while protein oligomerization was observed to a greater extent for the solid and semi-solid phase states of proteins. Our results show that the rate of both processes was sensitive towards ambient ozone concentration, but rather insensitive towards different NO2 levels. An increase of tropospheric ozone concentrations in the Anthropocene may thus promote pro-allergic protein modifications and contribute to the observed increase of allergies over the past decades.
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Affiliation(s)
- Fobang Liu
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
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20
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Celasun S, Remmler D, Schwaar T, Weller MG, Du Prez F, Börner HG. Eintauchen in den Sequenzraum der Thiolacton-Präzisionspolymere: eine kombinatorische Strategie zur Identifizierung funktionaler Domänen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201810393] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sensu Celasun
- Organische Synthese funktionaler Systeme; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Deutschland
| | - Dario Remmler
- Organische Synthese funktionaler Systeme; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Deutschland
- Bundesanstalt für Materialforschung und -prüfung (BAM); Richard-Willstätter-Straße 11 12489 Berlin Deutschland
| | - Timm Schwaar
- Bundesanstalt für Materialforschung und -prüfung (BAM); Richard-Willstätter-Straße 11 12489 Berlin Deutschland
| | - Michael G. Weller
- Bundesanstalt für Materialforschung und -prüfung (BAM); Richard-Willstätter-Straße 11 12489 Berlin Deutschland
| | - Filip Du Prez
- Polymer Chemistry Research group, Centre of Macromolecular Chemistry (CMaC); Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgien
| | - Hans G. Börner
- Organische Synthese funktionaler Systeme; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Deutschland
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21
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Celasun S, Remmler D, Schwaar T, Weller MG, Du Prez F, Börner HG. Digging into the Sequential Space of Thiolactone Precision Polymers: A Combinatorial Strategy to Identify Functional Domains. Angew Chem Int Ed Engl 2019; 58:1960-1964. [DOI: 10.1002/anie.201810393] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/14/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Sensu Celasun
- Laboratory for Organic Synthesis of Functional Systems; Department of Chemistry; Humboldt-Universität zu Berlin; Brook-Taylor-Strassse 2 12489 Berlin Germany
| | - Dario Remmler
- Laboratory for Organic Synthesis of Functional Systems; Department of Chemistry; Humboldt-Universität zu Berlin; Brook-Taylor-Strassse 2 12489 Berlin Germany
- Division 1.5 Protein Analysis; Federal Institute for Materials Research and Testing (BAM); Richard-Willstätter-Strasse 11 12489 Berlin Germany
| | - Timm Schwaar
- Division 1.5 Protein Analysis; Federal Institute for Materials Research and Testing (BAM); Richard-Willstätter-Strasse 11 12489 Berlin Germany
| | - Michael G. Weller
- Division 1.5 Protein Analysis; Federal Institute for Materials Research and Testing (BAM); Richard-Willstätter-Strasse 11 12489 Berlin Germany
| | - Filip Du Prez
- Polymer Chemistry Research group, Centre of Macromolecular Chemistry (CMaC); Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgium
| | - Hans G. Börner
- Laboratory for Organic Synthesis of Functional Systems; Department of Chemistry; Humboldt-Universität zu Berlin; Brook-Taylor-Strassse 2 12489 Berlin Germany
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22
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Abbas IM, Vranic M, Hoffmann H, El-Khatib AH, Montes-Bayón M, Möller HM, Weller MG. Investigations of the Copper Peptide Hepcidin-25 by LC-MS/MS and NMR. Int J Mol Sci 2018; 19:E2271. [PMID: 30072660 PMCID: PMC6121404 DOI: 10.3390/ijms19082271] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 06/12/2018] [Revised: 07/06/2018] [Accepted: 07/20/2018] [Indexed: 01/19/2023] Open
Abstract
Hepcidin-25 was identified as the main iron regulator in the human body, and it by binds to the sole iron-exporter ferroportin. Studies showed that the N-terminus of hepcidin is responsible for this interaction, the same N-terminus that encompasses a small copper(II)-binding site known as the ATCUN (amino-terminal Cu(II)- and Ni(II)-binding) motif. Interestingly, this copper-binding property is largely ignored in most papers dealing with hepcidin-25. In this context, detailed investigations of the complex formed between hepcidin-25 and copper could reveal insight into its biological role. The present work focuses on metal-bound hepcidin-25 that can be considered the biologically active form. The first part is devoted to the reversed-phase chromatographic separation of copper-bound and copper-free hepcidin-25 achieved by applying basic mobile phases containing 0.1% ammonia. Further, mass spectrometry (tandem mass spectrometry (MS/MS), high-resolution mass spectrometry (HRMS)) and nuclear magnetic resonance (NMR) spectroscopy were employed to characterize the copper-peptide. Lastly, a three-dimensional (3D) model of hepcidin-25 with bound copper(II) is presented. The identification of metal complexes and potential isoforms and isomers, from which the latter usually are left undetected by mass spectrometry, led to the conclusion that complementary analytical methods are needed to characterize a peptide calibrant or reference material comprehensively. Quantitative nuclear magnetic resonance (qNMR), inductively-coupled plasma mass spectrometry (ICP-MS), ion-mobility spectrometry (IMS) and chiral amino acid analysis (AAA) should be considered among others.
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Affiliation(s)
- Ioana M Abbas
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany.
| | - Marija Vranic
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany.
- Institute of Chemistry/Analytical Chemistry, University of Potsdam, 14476 Potsdam, Germany.
| | - Holger Hoffmann
- Federal Institute for Materials Research and Testing (BAM), Division 1.8 Environmental Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Ahmed H El-Khatib
- Federal Institute for Materials Research and Testing (BAM), Division 1.1 Inorganic Trace Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt.
| | - María Montes-Bayón
- Department of Physical and Analytical Chemistry, University of Oviedo, C/Julian Claveria 8, 33006 Oviedo, Spain.
| | - Heiko M Möller
- Institute of Chemistry/Analytical Chemistry, University of Potsdam, 14476 Potsdam, Germany.
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
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23
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Bernevic B, El-Khatib AH, Jakubowski N, Weller MG. Online immunocapture ICP-MS for the determination of the metalloprotein ceruloplasmin in human serum. BMC Res Notes 2018; 11:213. [PMID: 29609633 PMCID: PMC5879926 DOI: 10.1186/s13104-018-3324-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 01/03/2018] [Accepted: 03/23/2018] [Indexed: 01/28/2023] Open
Abstract
Objective The human copper-protein ceruloplasmin (Cp) is the major copper-containing protein in the human body. The accurate determination of Cp is mandatory for the reliable diagnosis of several diseases. However, the analysis of Cp has proven to be difficult. The aim of our work was a proof of concept for the determination of a metalloprotein-based on online immunocapture ICP-MS. The immuno-affinity step is responsible for the enrichment and isolation of the analyte from serum, whereas the compound-independent quantitation with ICP-MS delivers the sensitivity, precision, and large dynamic range. Off-line ELISA (enzyme-linked immunosorbent assay) was used in parallel to confirm the elution profile of the analyte with a structure-selective method. The total protein elution was observed with the 32S mass trace. The ICP-MS signals were normalized on a 59Co signal. Results The human copper-protein Cp could be selectively determined. This was shown with pure Cp and with a sample of human serum. The good correlation with off-line ELISA shows that Cp could be captured and eluted selectively from the anti-Cp affinity column and subsequently determined by the copper signal of ICP-MS. Electronic supplementary material The online version of this article (10.1186/s13104-018-3324-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bogdan Bernevic
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
| | - Ahmed H El-Khatib
- Division 1.1 Inorganic Trace Analysis, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489, Berlin, Germany.,Faculty of Pharmacy, Department of Analytical Chemistry, Ain Shams University, Organization of African Unity Street, Abassia, Cairo, 11566, Egypt
| | - Norbert Jakubowski
- Division 1.1 Inorganic Trace Analysis, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
| | - Michael G Weller
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, 12489, Berlin, Germany.
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24
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Abstract
The quality of research antibodies is an issue for decades. Although several papers have been published to improve the situation, their impact seems to be limited. This publication makes the effort to simplify the description of validation criteria in a way that the occasional antibody user is able to assess the validation level of an immunochemical reagent. A simple, 1-page checklist is supplied for the practical application of these criteria.
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Affiliation(s)
- Michael G Weller
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
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25
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Abbas IM, Schwaar T, Bienwald F, Weller MG. Predictable Peptide Conjugation Ratios by Activation of Proteins with Succinimidyl Iodoacetate (SIA). Methods Protoc 2017; 1:mps1010002. [PMID: 31164550 PMCID: PMC6526413 DOI: 10.3390/mps1010002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 08/02/2017] [Revised: 09/12/2017] [Accepted: 09/14/2017] [Indexed: 12/30/2022] Open
Abstract
The small heterobifunctional linker succinimidyl iodoacetate (SIA) was examined for the preparation of peptide–protein bioconjugates with predicable conjugation ratios. For many conjugation protocols, the protein is either treated with a reductant to cleave disulfide bonds or is reacted with thiolation chemicals, such as Traut’s reagent. Both approaches are difficult to control, need individual optimization and often lead to unsatisfactory results. In another popular approach, a heterobifunctional linker with a N-hydroxysuccinimide (NHS) and a maleimide functionality is applied to the protein. After the activation of some lysine ε-amino groups with the NHS ester functionality, a cysteine-containing peptide is attached to the activated carrier protein via maleimide. Particularly, the maleimide reaction leads to some unwanted byproducts or even cleavage of the linker. Many protocols end up with conjugates with unpredictable and irreproducible conjugation ratios. In addition, the maleimide-thiol addition product should be assumed immunogenic in vivo. To avoid these and other disadvantages of the maleimide approach, we examined the known linker succinimidyl iodoacetate (SIA) in more detail and developed two protocols, which lead to peptide–protein conjugates with predefined average conjugation ratios. This holds potential to eliminate tedious and expensive optimization steps for the synthesis of a bioconjugate of optimal composition.
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Affiliation(s)
- Ioana M Abbas
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- Humboldt-Universität zu Berlin, School of Analytical Sciences Adlershof, Unter den Linden 6, 10099 Berlin, Germany.
| | - Timm Schwaar
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Frank Bienwald
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
- Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Michael G Weller
- Federal Institute for Materials Research and Testing (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
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26
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Reinmuth-Selzle K, Kampf CJ, Lucas K, Lang-Yona N, Fröhlich-Nowoisky J, Shiraiwa M, Lakey PSJ, Lai S, Liu F, Kunert AT, Ziegler K, Shen F, Sgarbanti R, Weber B, Bellinghausen I, Saloga J, Weller MG, Duschl A, Schuppan D, Pöschl U. Air Pollution and Climate Change Effects on Allergies in the Anthropocene: Abundance, Interaction, and Modification of Allergens and Adjuvants. Environ Sci Technol 2017; 51:4119-4141. [PMID: 28326768 PMCID: PMC5453620 DOI: 10.1021/acs.est.6b04908] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 03/07/2017] [Accepted: 03/22/2017] [Indexed: 05/13/2023]
Abstract
Air pollution and climate change are potential drivers for the increasing burden of allergic diseases. The molecular mechanisms by which air pollutants and climate parameters may influence allergic diseases, however, are complex and elusive. This article provides an overview of physical, chemical and biological interactions between air pollution, climate change, allergens, adjuvants and the immune system, addressing how these interactions may promote the development of allergies. We reviewed and synthesized key findings from atmospheric, climate, and biomedical research. The current state of knowledge, open questions, and future research perspectives are outlined and discussed. The Anthropocene, as the present era of globally pervasive anthropogenic influence on planet Earth and, thus, on the human environment, is characterized by a strong increase of carbon dioxide, ozone, nitrogen oxides, and combustion- or traffic-related particulate matter in the atmosphere. These environmental factors can enhance the abundance and induce chemical modifications of allergens, increase oxidative stress in the human body, and skew the immune system toward allergic reactions. In particular, air pollutants can act as adjuvants and alter the immunogenicity of allergenic proteins, while climate change affects the atmospheric abundance and human exposure to bioaerosols and aeroallergens. To fully understand and effectively mitigate the adverse effects of air pollution and climate change on allergic diseases, several challenges remain to be resolved. Among these are the identification and quantification of immunochemical reaction pathways involving allergens and adjuvants under relevant environmental and physiological conditions.
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Affiliation(s)
| | - Christopher J. Kampf
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
- Institute
of Inorganic and Analytical Chemistry, Johannes
Gutenberg University, Mainz, 55128, Germany
| | - Kurt Lucas
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Naama Lang-Yona
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | | | - Manabu Shiraiwa
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
- Department
of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Pascale S. J. Lakey
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Senchao Lai
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
- South
China University of Technology, School of
Environment and Energy, Guangzhou, 510006, China
| | - Fobang Liu
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Anna T. Kunert
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Kira Ziegler
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Fangxia Shen
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Rossella Sgarbanti
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Bettina Weber
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
| | - Iris Bellinghausen
- Department
of Dermatology, University Medical Center, Johannes Gutenberg University, Mainz, 55131, Germany
| | - Joachim Saloga
- Department
of Dermatology, University Medical Center, Johannes Gutenberg University, Mainz, 55131, Germany
| | - Michael G. Weller
- Division
1.5 Protein Analysis, Federal Institute
for Materials Research and Testing (BAM), Berlin, 12489, Germany
| | - Albert Duschl
- Department
of Molecular Biology, University of Salzburg, 5020 Salzburg, Austria
| | - Detlef Schuppan
- Institute
of Translational Immunology and Research Center for Immunotherapy,
Institute of Translational Immunology, University Medical Center, Johannes Gutenberg University, Mainz, 55131 Germany
- Division
of Gastroenterology, Beth Israel Deaconess
Medical Center and Harvard Medical School, Boston, Massachusetts 02215, United States
| | - Ulrich Pöschl
- Multiphase
Chemistry Department, Max Planck Institute
for Chemistry, Mainz, 55128, Germany
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Liu F, Reinmuth-Selzle K, Lai S, Weller MG, Pöschl U, Kampf CJ. Simultaneous determination of nitrated and oligomerized proteins by size exclusion high-performance liquid chromatography coupled to photodiode array detection. J Chromatogr A 2017; 1495:76-82. [PMID: 28342582 DOI: 10.1016/j.chroma.2017.03.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 11/24/2016] [Revised: 03/07/2017] [Accepted: 03/09/2017] [Indexed: 12/25/2022]
Abstract
Chemical modifications such as nitration and cross-linking may enhance the allergenic potential of proteins. The kinetics and mechanisms of the underlying chemical processes, however, are not yet well understood. Here, we present a size-exclusion chromatography/spectrophotometry method (SEC-HPLC-DAD) that allows a simultaneous detection of mono-, di-, tri-, and higher protein oligomers, as well as their individual nitration degrees (NDs). The ND results of proteins from this new method agree well with the results from an alternative well-established method, for the analysis of tetranitromethane (TNM)- and nitrogen dioxide and ozone (NO2/O3)-nitrated protein samples. Importantly, the NDs for individual oligomer fractions can be obtained from the new method, and also, we provide a proof of principle for the calculation of the concentrations for individual protein oligomer fractions by their determined NDs, which will facilitate the investigation of the kinetics and mechanism for protein tyrosine nitration and cross-linking.
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Affiliation(s)
- Fobang Liu
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
| | - Kathrin Reinmuth-Selzle
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
| | - Senchao Lai
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
| | - Michael G Weller
- Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Str. 11, 12489 Berlin, Germany
| | - Ulrich Pöschl
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
| | - Christopher J Kampf
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germany; Institute for Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany; Institute for Inorganic and Analytical Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany.
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28
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29
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Abstract
According to several recent studies, an unexpectedly high number of landmark papers seem to be not reproducible by independent laboratories. Nontherapeutic antibodies used for research, diagnostic, food analytical, environmental, and other purposes play a significant role in this matter. Although some papers have been published offering suggestions to improve the situation, they do not seem to be comprehensive enough to cover the full complexity of this issue. In addition, no obvious improvements could be noticed in the field as yet. This article tries to consolidate the remarkable variety of conclusions and suggested activities into a more coherent conception. It is concluded that funding agencies and journal publishers need to take first and immediate measures to resolve these problems and lead the way to a more sustainable way of bioanalytical research, on which all can rely with confidence.
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Affiliation(s)
- Michael G. Weller
- Bundesanstalt für Materialforschung und -prüfung (BAM), Division 1.5 Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
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30
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Hesse A, Biyikal M, Rurack K, Weller MG. Development of highly sensitive and selective antibodies for the detection of the explosive pentaerythritol tetranitrate (PETN) by bioisosteric replacement. J Mol Recognit 2015; 29:88-94. [PMID: 26463875 DOI: 10.1002/jmr.2511] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 03/11/2015] [Revised: 08/03/2015] [Accepted: 08/24/2015] [Indexed: 11/06/2022]
Abstract
An improved antibody against the explosive pentaerythritol tetranitrate (PETN) was developed. The immunogen was designed by the concept of bioisosteric replacement, which led to an excellent polyclonal antibody with extreme selectivity and immunoassays of very good sensitivity. Compounds such as nitroglycerine, 2,4,6-trinitrotoluene, 1,3,5-trinitrobenzene, hexogen (RDX), 2,4,6-trinitroaniline, 1,3-dinitrobenzene, octogen (HMX), triacetone triperoxide, ammonium nitrate, 2,4,6-trinitrophenol and nitrobenzene were tested for potential cross-reactivity. The detection limit of a competitive enzyme-linked immunosorbent assay was determined to be around 0.5 µg/l. The dynamic range of the assay was found to be between 1 and 1000 µg/l, covering a concentration range of three decades. This work shows the successful application of the bioisosteric concept in immunochemistry by exchange of a nitroester to a carbonate diester. The antiserum might be used for the development of quick tests, biosensors, microtitration plate immunoassays, microarrays and other analytical methods for the highly sensitive detection of PETN, an explosive frequently used by terrorists, exploiting the extreme difficulty of its detection.
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Affiliation(s)
- Almut Hesse
- Division 1.5, Protein Analysis, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
| | - Mustafa Biyikal
- Division 1.9, Chemical and Optical Sensing, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
| | - Knut Rurack
- Division 1.9, Chemical and Optical Sensing, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
| | - Michael G Weller
- Division 1.5, Protein Analysis, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
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31
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Climent E, Gröninger D, Hecht M, Walter MA, Martínez-Máñez R, Weller MG, Sancenón F, Amorós P, Rurack K. Selective, Sensitive, and Rapid Analysis with Lateral-Flow Assays Based on Antibody-Gated Dye-Delivery Systems: The Example of Triacetone Triperoxide. Chemistry 2013; 19:4117-22. [DOI: 10.1002/chem.201300031] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Indexed: 12/19/2022]
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Bahlmann A, Carvalho JJ, Weller MG, Panne U, Schneider RJ. Immunoassays as high-throughput tools: monitoring spatial and temporal variations of carbamazepine, caffeine and cetirizine in surface and wastewaters. Chemosphere 2012; 89:1278-1286. [PMID: 22682895 DOI: 10.1016/j.chemosphere.2012.05.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Revised: 05/11/2012] [Accepted: 05/14/2012] [Indexed: 06/01/2023]
Abstract
Carbamazepine (CBZ), caffeine and cetirizine were monitored by enzyme-linked immunosorbent assays (ELISAs) in surface and wastewaters from Berlin, Germany. This fast and cost-efficient method enabled to assess the spatial and temporal variation of these anthropogenic markers in a high-throughput screening. CBZ and cetirizine were detected by the same antibody, which selectively discriminates between both compounds depending on the pH value used in the incubation step. To our best knowledge, this is the first dual-analyte immunoassay working with a single antibody. The frequent sampling with 487 samples being processed allowed for the repeated detection of unusually high concentrations of CBZ and caffeine. ELISA results correlate well with the ones obtained by liquid chromatography tandem mass spectrometry (LC-MS/MS). Caffeine concentrations found in surface waters were elevated by combined sewer overflows after stormwater events. During the hay fever season, the concentrations of the antihistamine drug cetirizine increased in both surface and wastewaters. Caffeine was almost completely removed during wastewater treatment, while CBZ and cetirizine were found to be more persistent. The maximum concentrations of caffeine, CBZ and cetirizine found in influent wastewater by LC-MS/MS were 470, 5.0 and 0.49 μg L(-1), while in effluent wastewater the concentrations were 0.22, 4.5 and 0.51 μg L(-1), respectively. For surface waters, concentrations up to 3.3, 4.5 and 0.72 μg L(-1) were found, respectively.
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Affiliation(s)
- Arnold Bahlmann
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, D-12489 Berlin, Germany
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34
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Ramin S, Weller MG. Extremely sensitive and selective antibodies against the explosive 2,4,6-trinitrotoluene by rational design of a structurally optimized hapten. J Mol Recognit 2012; 25:89-97. [PMID: 22290770 DOI: 10.1002/jmr.2162] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Antibodies are a promising tool for the fast and selective trace detection of explosives. Unfortunately, the production of high-quality antibodies is not trivial and often expensive. Therefore, excellent antibodies are a rare and limiting resource in fields such as biosensing, environmental analysis, diagnostics, cancer therapy, and proteomics. Here, we report the synthesis, bioconjugation, and application of the structurally optimized hapten 6-(2,4,6-trinitro)-phenylhexanoic acid to improve the selectivity and sensitivity of antibodies for the detection of one of the most important explosives, trinitrotoluene. With a conjugate of bovine serum albumin and a highly purified N-hydroxy-succinimide (NHS)-activated hapten, two rabbits were immunized to obtain polyclonal antibodies. The immunization process was monitored by enzyme-linked immunosorbent assay to gain information about the progress of antibody titer and affinity. Finally, the polyclonal antibodies reached an affinity constant of (5.1 ± 0.6) × 10(9) l/mol (rabbit R1) and (2.3 ± 0.2) × 10(9) l/mol (rabbit R2). The respective assays show a minimum test midpoint (IC(50) value) of 0.1 ± 0.01 µg/l (R1) and 0.2 ± 0.02 µg/l (R2) and a working range of 0.005 to 150 µg/l (R1) and 0.007 to 200 µg/l (R2), which corresponds to more than four orders of magnitude for both. This is quite remarkable for a competitive immunoassay, which is often believed to have a narrow dynamic range. The limit of detection was calculated to 0.6 ng/l (R1) and 1.5 ng/l (R2), which is up to 100 times improvement in relation to the assay of Zeck et al. (1999) on the basis of a monoclonal antibody. The excellent selectivity of the polyclonal antibodies was comprehensively examined by determining the cross-reactivity to common explosives and other nitroaromatics including nitro musk components. The widely held belief that polyclonal antibodies generally display higher cross-reactivities than monoclonals could be disproved.
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Affiliation(s)
- Steffen Ramin
- BAM Federal Institute for Materials Research and Testing, Division 1.5, Protein Analysis, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
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35
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Pecher HS, Zimathies A, Weller MG. Oligoepoxide-Based Monoliths: Synthesis and Application as Affinity Capillary Column for Enrichment of Immunoglobulin G. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200206] [Citation(s) in RCA: 6] [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: 12/15/2022]
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Weller MG. A unifying review of bioassay-guided fractionation, effect-directed analysis and related techniques. Sensors (Basel) 2012; 12:9181-209. [PMID: 23012539 PMCID: PMC3444097 DOI: 10.3390/s120709181] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 06/26/2012] [Accepted: 07/02/2012] [Indexed: 12/24/2022]
Abstract
The success of modern methods in analytical chemistry sometimes obscures the problem that the ever increasing amount of analytical data does not necessarily give more insight of practical relevance. As alternative approaches, toxicity- and bioactivity-based assays can deliver valuable information about biological effects of complex materials in humans, other species or even ecosystems. However, the observed effects often cannot be clearly assigned to specific chemical compounds. In these cases, the establishment of an unambiguous cause-effect relationship is not possible. Effect-directed analysis tries to interconnect instrumental analytical techniques with a biological/biochemical entity, which identifies or isolates substances of biological relevance. Successful application has been demonstrated in many fields, either as proof-of-principle studies or even for complex samples. This review discusses the different approaches, advantages and limitations and finally shows some practical examples. The broad emergence of effect-directed analytical concepts might lead to a true paradigm shift in analytical chemistry, away from ever growing lists of chemical compounds. The connection of biological effects with the identification and quantification of molecular entities leads to relevant answers to many real life questions.
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Affiliation(s)
- Michael G Weller
- Division 1.5 Protein Analysis, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
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Schwarz G, Beck S, Weller MG, Linscheid MW. Comparison of the fragmentation behavior of differentially metal-coded affinity tag (MeCAT)-labeled peptides. J Mass Spectrom 2012; 47:885-889. [PMID: 22791256 DOI: 10.1002/jms.3036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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Carvalho JJ, Walter MA, Baermann-Stapel Y, Weller MG, Panne U, Schenk JA, Schneider RJ. Non-invasive monitoring of immunization progress in mice via IgG from feces. In Vivo 2012; 26:63-69. [PMID: 22210717] [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: 05/31/2023]
Abstract
A non-invasive method to monitor the humoral immune response in mice after immunization is described. From fecal pellets of an individual mouse, a sufficient amount of active immunoglobulins or their fragments can be extracted to perform a regular examination of the status of the immune response by immunoassay. Hapten-specific antibodies from the feces of mice from three immunization trials showed very similar characteristics to those obtained from serum at a given date. Therefore, it can be suspected that some serum IgG enters the intestinal lumen and ends up in the feces, where they appear to be considerably stable. Hapten-specific IgAs were not found in the feces. Being able to analyze antibody titers in feces could be an interesting animal welfare refinement to standard practice that does not entail repeated blood sampling.
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Affiliation(s)
- José João Carvalho
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, D-12489 Berlin, Germany
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Schwarz G, Beck S, Weller MG, Linscheid MW. MeCAT—new iodoacetamide reagents for metal labeling of proteins and peptides. Anal Bioanal Chem 2011; 401:1203-9. [DOI: 10.1007/s00216-011-5189-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 06/01/2011] [Accepted: 06/14/2011] [Indexed: 10/18/2022]
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Bahlmann A, Falkenhagen J, Weller MG, Panne U, Schneider RJ. Cetirizine as pH-dependent cross-reactant in a carbamazepine-specific immunoassay. Analyst 2011; 136:1357-64. [PMID: 21331395 DOI: 10.1039/c0an00928h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [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]
Abstract
High performance liquid chromatography (HPLC) was hyphenated with a previously reported carbamazepine-specific enzyme-linked immunosorbent assay (ELISA) as a screening approach to water analysis in order to identify possible interferences from transformation products. Treated wastewater was analysed and three substances were recognized by the antibody besides carbamazepine: the metabolites 10,11-dihydro-10,11-epoxycarbamazepine and 2-hydroxycarbamazepine plus the structurally not obviously related antihistamine cetirizine. The molar cross-reactivity against cetirizine was found to be pH-dependent and assessed to be 400% at pH 4.5 and 22% at pH 10.5. Performing the ELISA at pH 10.5 greatly improved the accuracy when carbamazepine was determined in surface and wastewater samples.
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Affiliation(s)
- Arnold Bahlmann
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
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Walter MA, Pfeifer D, Kraus W, Emmerling F, Schneider RJ, Panne U, Weller MG. Triacetone triperoxide (TATP): hapten design and development of antibodies. Langmuir 2010; 26:15418-15423. [PMID: 20815355 DOI: 10.1021/la1018339] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Triacetone triperoxide (TATP), an improvised explosive, is a potential security threat because of its cost-efficient synthesis and the difficulty in detecting it. A highly selective antibody could provide the necessary specificity to the detection process. To obtain antibodies, a hapten made from acetone, hydrogen peroxide, and 7-oxooctanoic acid has been designed, synthesized, and confirmed by NMR that displays the utmost similarity to the analyte. The single-crystal X-ray structures of the solvated species TATP·methanol (1:1) and the TATP derivate were determined. In both compounds, the molecules exhibit D(3) symmetry and adopt a twisted boat-chair conformation. The hapten was coupled to bovine serum albumin, and mice were immunized. An immune response against TATP was elicited, and selective antibodies were detected in the mouse serum, which should be very useful for the development of a TATP biosensor system. An ELISA with a limit of detection for TATP of 65 μg L(-1) is shown.
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Affiliation(s)
- Maria Astrid Walter
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany
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Carvalho JJ, Weller MG, Panne U, Schneider RJ. A highly sensitive caffeine immunoassay based on a monoclonal antibody. Anal Bioanal Chem 2010; 396:2617-28. [PMID: 20155491 DOI: 10.1007/s00216-010-3506-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 01/13/2010] [Accepted: 01/21/2010] [Indexed: 11/26/2022]
Abstract
A new immunoassay has been developed based on a commercially available anti-caffeine monoclonal antibody and a de novo synthesized tracer, using horseradish peroxidase and UV-visible detection. Caffeine, which is frequently found in surface waters, can be quantified with a relative error lower than 20% for concentrations above 0.025 microg L(-1) (limit of quantitation, direct analysis). The limit of detection is 0.001 microg L(-1) and can be reduced by solid-phase extraction (SPE). Moreover, with minor adaptations, the assay can be used to quantify caffeine in several beverages, shampoo, and caffeine tablets. The results obtained by ELISA correlate well with those from liquid chromatography-tandem mass spectrometry (LC-MS-MS) for the tested matrices. Several surface waters from Berlin were analysed and all tested positive for caffeine, with concentrations higher than 0.030 microg L(-1). In one run 66 samples can be analysed within 2 h.
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Affiliation(s)
- José João Carvalho
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, 12489 Berlin, Germany
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Bahlmann A, Weller MG, Panne U, Schneider RJ. Monitoring carbamazepine in surface and wastewaters by an immunoassay based on a monoclonal antibody. Anal Bioanal Chem 2009; 395:1809-20. [PMID: 19633964 DOI: 10.1007/s00216-009-2958-7] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 06/19/2009] [Accepted: 07/07/2009] [Indexed: 11/25/2022]
Abstract
The pharmaceutical compound carbamazepine (CBZ) is an emerging pollutant in the aquatic environment and may potentially be used as a wastewater marker. In this work, an enzyme-linked immunosorbent assay (ELISA) for the detection of carbamazepine in surface and sewage waters has been developed. The heterogeneous immunoassay is based on a commercially available monoclonal antibody and a novel enzyme conjugate (tracer) that links the hapten via a hydrophilic peptide (triglycine) spacer to horseradish peroxidase. The assay achieves a limit of detection of 24 ng/L and a quantitation range of 0.05-50 microg/L. The analytical performance and figure of merits were compared to liquid chromatography-tandem mass spectrometry after solid-phase extraction. For nine Berlin surface water samples and one wastewater sample, a close correlation of results was observed. A constant overestimation relative to the CBZ concentration of approximately 30% by ELISA is probably caused by the presence of 10,11-epoxy-CBZ and 2-hydroxy-CBZ in the samples. The ELISA displayed cross-reactivities for these compounds of 83% and 14%, respectively. In a first screening of 27 surface water samples, CBZ was detected in every sample with concentrations between 0.05 and 3.2 microg/L. Since no sample cleanup is required, the assay allowed for the determination of carbamazepine with high sensitivity at low costs and with much higher throughput than with conventional methods.
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Affiliation(s)
- Arnold Bahlmann
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, 12489, Berlin, Germany
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Descalzo AB, Xu HJ, Xue ZL, Hoffmann K, Shen Z, Weller MG, You XZ, Rurack K. Phenanthrene-Fused Boron−Dipyrromethenes as Bright Long-Wavelength Fluorophores. Org Lett 2008; 10:1581-4. [DOI: 10.1021/ol800271e] [Citation(s) in RCA: 136] [Impact Index Per Article: 8.5] [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)
- Ana B. Descalzo
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Hai-Jun Xu
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Zhao-Li Xue
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Katrin Hoffmann
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Zhen Shen
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Michael G. Weller
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Xiao-Zeng You
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
| | - Knut Rurack
- BAMFederal Institute for Materials Research and Testing, Division I.5, Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, PR China
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Cervino C, Knopp D, Weller MG, Niessner R. Novel aflatoxin derivatives and protein conjugates. Molecules 2007; 12:641-53. [PMID: 17851418 PMCID: PMC6149377 DOI: 10.3390/12030641] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2007] [Revised: 03/25/2007] [Accepted: 03/26/2007] [Indexed: 11/17/2022] Open
Abstract
Aflatoxins, a group of structurally related mycotoxins, are well known for their toxic and carcinogenic effects in humans and animals. Aflatoxin derivatives and protein conjugates are needed for diverse analytical applications. This work describes a reliable and fast synthesis of novel aflatoxin derivatives, purification by preparative HPLC and characterisation by ESI-MS and one- and two-dimensional NMR. Novel aflatoxin bovine serum albumin conjugates were prepared and characterised by UV absorption and MALDI-MS. These aflatoxin protein conjugates are potentially interesting as immunogens for the generation of aflatoxin selective antibodies with novel specificities.
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Affiliation(s)
- Christian Cervino
- Institute of Hydrochemistry, Chair for Analytical Chemistry, Technische Universität München, Marchioninistrasse 17, 81377 München, Germany; E-mail:
- Author to whom correspondence should be addressed; E-mail:
| | - Dietmar Knopp
- Institute of Hydrochemistry, Chair for Analytical Chemistry, Technische Universität München, Marchioninistrasse 17, 81377 München, Germany; E-mail:
| | - Michael G. Weller
- Federal Institute for Materials Research and Testing (BAM), Division I.5 (Bioanalytics), Richard-Willstätter-Strasse 11, 12489 Berlin, Germany; E-mail:
| | - Reinhard Niessner
- Institute of Hydrochemistry, Chair for Analytical Chemistry, Technische Universität München, Marchioninistrasse 17, 81377 München, Germany; E-mail:
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Gruijthuijsen YK, Grieshuber I, Stöcklinger A, Tischler U, Fehrenbach T, Weller MG, Vogel L, Vieths S, Pöschl U, Duschl A. Nitration Enhances the Allergenic Potential of Proteins. Int Arch Allergy Immunol 2006; 141:265-75. [PMID: 16931888 DOI: 10.1159/000095296] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2005] [Accepted: 04/26/2006] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Recent investigations have shown that proteins, including Bet v 1a, are nitrated by exposure to polluted urban air. We have investigated immunogenic and allergenic properties of in vitro nitrated allergens in in vivo models. METHODS Untreated and nitrated samples of ovalbumin or Bet v 1a were compared for their ability to stimulate proliferation and cytokine secretion in splenocytes from DO11.10 or from sensitized BALB/c mice, and for their ability to induce specific immunoglobulin (Ig)G1, IgG2a and IgE in sensitized mice. Additionally, sera from birch pollen-allergic individuals were analysed for IgE and IgG specific for nitrated Bet v 1a. RESULTS Upon splenocyte stimulation with nitrated as compared with unmodified allergens, proliferation as well as interleukin 5 and interferon-gamma production were enhanced. Sera of mice sensitized with nitrated allergens showed elevated levels of specific IgE, IgG1 and IgG2a, compared with sera from mice sensitized with unmodified allergens. Moreover, cross-reactivity of antibodies against unrelated, nitrated allergens was observed in mice. We also found higher amounts of functional, specific IgE against nitrated than against untreated Bet v 1a in sera from birch pollen-allergic patients. CONCLUSIONS Our findings suggest that nitration enhances allergic responses, which may contribute to an increased prevalence of allergic diseases in polluted urban environments.
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Affiliation(s)
- Y K Gruijthuijsen
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria
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Fabel S, Niessner R, Weller MG. Effect-directed analysis by high-performance liquid chromatography with gas-segmented enzyme inhibition. J Chromatogr A 2005; 1099:103-10. [PMID: 16197955 DOI: 10.1016/j.chroma.2005.08.081] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2005] [Revised: 08/12/2005] [Accepted: 08/29/2005] [Indexed: 11/28/2022]
Abstract
A reversed-phase high-performance liquid chromatography system with UV-detector was equipped with an on-line acetylcholinesterase inhibition assay to achieve effect-directed analysis of potentially toxic samples. The enzyme activity was detected colorimetrically using Ellman's reagent. The inhibition and substrate conversion took place in glass capillaries at a 100 microL/min flow rate. Extra-column band spreading in the reaction coils reduces the sensitivity and separation power of biochemical detectors severely. Knitted reactors exhibited no reduction of longitudinal dispersion in the tested flow range. The implementation of air-segmentation allowed an extended inhibition and substrate conversion time without a significant loss of chromatographic resolution. The limit of detection of two model compounds carbofuran (carbamate) and paraoxon-ethyl (organophosphate) was determined to be 13 ng (injected mass) and 7.4 ng, respectively, applying an isocratic chromatography method. A mixture of five insecticides was separated by a gradient elution and the inhibitory effect on the enzyme activity could be detected with high resolution. The band width at half height of the enzyme inhibition detector signal after a reaction time of about 8 min or 4.2 m of capillary, respectively, increased only by a factor of 1.4 compared to the UV-detector signal.
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Affiliation(s)
- Susanne Fabel
- Institute of Hydrochemistry, Technische Universität München, Marchioninistrasse 17, D-81377 München, Germany
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Kiening M, Niessner R, Drs E, Baumgartner S, Krska R, Bremer M, Tomkies V, Reece P, Danks C, Immer U, Weller MG. Sandwich immunoassays for the determination of peanut and hazelnut traces in foods. J Agric Food Chem 2005; 53:3321-3327. [PMID: 15853366 DOI: 10.1021/jf048394r] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
People suffering from food allergies are dependent on accurate food labeling, as an avoidance diet is the only effective countermeasure. Even a small amount of allergenic protein can trigger severe reactions in highly sensitized patients. Therefore, sensitive and reliable tests are needed to detect potential cross-contamination. In this paper two fast sandwich immunoassays are described for the determination of peanut (Arachis hypogaea) and hazelnut (Corylus avellana) traces in complex food matrices. Mouse monoclonal antibodies were used as capture antibodies, and labeled rabbit polyclonal antibodies were used as detection antibodies in both assays. The assay time was 30 min in total, and cross-reactivities against a variety of fruits and seeds were found to be in the low 10(-4)% (ppm) level or in some cases not detectable. The recoveries in all tested food matrices ranged from 86 to 127%, and the limits of detection were in the range of 0.2-1.2 mg/kg (ppm) in food for both peanut and hazelnut, respectively.
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Affiliation(s)
- Martin Kiening
- Institute of Hydrochemistry, Technische Universität München, Marchioninistrasse 17, D-81377 München, Germany
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Abstract
The effects of air pollution on allergic diseases are not yetwell-understood. Here, we show that proteins, in particular birch pollen proteins including the allergen Bet v 1, are efficiently nitrated by polluted air. This posttranslational modification of proteins is likely to trigger immune reactions and provides a molecular rationale for the promotion of allergies bytraffic-related air pollution. Enzyme immunoassays have been used to determine equivalent degrees of nitration (EDN) for protein samples exposed to urban outdoor air and synthetic gas mixtures. The observed rates of nitration were governed by the abundance of nitrogen oxides and ozone, and concentration levels typical for summer smog conditions led to substantial nitration within a few hours to days (EDN up to 20%). Moreover, nitrated proteins were detected in urban road dust, window dust, and fine air particulate matter (EDN up to 0.1%).
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Affiliation(s)
- Thomas Franze
- Technical University of Munich, Institute of Hydrochemistry, Marchioninistrasse 17, D-81377 Munich, Germany
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