1
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Le-Vinh B, Steinbring C, Nguyen Le NM, Matuszczak B, Bernkop-Schnürch A. S-Protected Thiolated Chitosan versus Thiolated Chitosan as Cell Adhesive Biomaterials for Tissue Engineering. ACS Appl Mater Interfaces 2023; 15:40304-40316. [PMID: 37594415 PMCID: PMC10472333 DOI: 10.1021/acsami.3c09337] [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: 06/28/2023] [Accepted: 08/07/2023] [Indexed: 08/19/2023]
Abstract
Chitosan (Ch) and different Ch derivatives have been applied in tissue engineering (TE) because of their biocompatibility, favored mechanical properties, and cost-effectiveness. Most of them, however, lack cell adhesive properties that are crucial for TE. In this study, we aimed to design an S-protected thiolated Ch derivative exhibiting high cell adhesive properties serving as a scaffold for TE. 3-((2-Acetamido-3-methoxy-3-oxopropyl)dithio) propanoic acid was covalently attached to Ch via a carbodiimide-mediated reaction. Low-, medium-, and high-modified Chs (Ch-SS-1, Ch-SS-2, and Ch-SS-3) with 54, 107 and 140 μmol of ligand per gram of polymer, respectively, were tested. In parallel, three thiolated Chs, namely Ch-SH-1, Ch-SH-2, and Ch-SH-3, were prepared by conjugating N-acetyl cysteine to Ch at the same degree of modification to compare the effectiveness of disulfide versus thiol modification on cell adhesion. Ch-SS-1 showed better cell adhesion capability than Ch-SS-2 and Ch-SS-3. This can be explained by the more lipophilic surfaces of Ch-SS as a higher modification was made. Although Ch-SH-1, Ch-SH-2, and Ch-SH-3 were shown to be good substrates for cell adhesion, growth, and proliferation, Ch-SS polymers were superior to Ch-SH polymers in the formation of 3D cell cultures. Cryogels structured by Ch-SS-1 (SSg) resulted in homogeneous scaffolds with tunable pore size and mechanical properties by changing the mass ratio between Ch-SS-1 and heparin used as a cross-linker. SSg scaffolds possessing interconnected microporous structures showed good cell migration, adhesion, and proliferation. Therefore, Ch-SS can be used to construct tunable cryogel scaffolds that are suitable for 3D cell culture and TE.
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Affiliation(s)
- Bao Le-Vinh
- Department
of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
- Department
of Industrial Pharmacy, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, 700000 Ho Chi Minh
City, Vietnam
| | - Christian Steinbring
- Department
of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Nguyet-Minh Nguyen Le
- Department
of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
- Department
of Industrial Pharmacy, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, 700000 Ho Chi Minh
City, Vietnam
| | - Barbara Matuszczak
- Department
of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Department
of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
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2
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Surdu M, Lamkaddam H, Wang DS, Bell DM, Xiao M, Lee CP, Li D, Caudillo L, Marie G, Scholz W, Wang M, Lopez B, Piedehierro AA, Ataei F, Baalbaki R, Bertozzi B, Bogert P, Brasseur Z, Dada L, Duplissy J, Finkenzeller H, He XC, Höhler K, Korhonen K, Krechmer JE, Lehtipalo K, Mahfouz NGA, Manninen HE, Marten R, Massabò D, Mauldin R, Petäjä T, Pfeifer J, Philippov M, Rörup B, Simon M, Shen J, Umo NS, Vogel F, Weber SK, Zauner-Wieczorek M, Volkamer R, Saathoff H, Möhler O, Kirkby J, Worsnop DR, Kulmala M, Stratmann F, Hansel A, Curtius J, Welti A, Riva M, Donahue NM, Baltensperger U, El Haddad I. Molecular Understanding of the Enhancement in Organic Aerosol Mass at High Relative Humidity. Environ Sci Technol 2023; 57:2297-2309. [PMID: 36716278 PMCID: PMC9933880 DOI: 10.1021/acs.est.2c04587] [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: 06/26/2022] [Revised: 10/11/2022] [Accepted: 11/21/2022] [Indexed: 06/18/2023]
Abstract
The mechanistic pathway by which high relative humidity (RH) affects gas-particle partitioning remains poorly understood, although many studies report increased secondary organic aerosol (SOA) yields at high RH. Here, we use real-time, molecular measurements of both the gas and particle phase to provide a mechanistic understanding of the effect of RH on the partitioning of biogenic oxidized organic molecules (from α-pinene and isoprene) at low temperatures (243 and 263 K) at the CLOUD chamber at CERN. We observe increases in SOA mass of 45 and 85% with increasing RH from 10-20 to 60-80% at 243 and 263 K, respectively, and attribute it to the increased partitioning of semi-volatile compounds. At 263 K, we measure an increase of a factor 2-4 in the concentration of C10H16O2-3, while the particle-phase concentrations of low-volatility species, such as C10H16O6-8, remain almost constant. This results in a substantial shift in the chemical composition and volatility distribution toward less oxygenated and more volatile species at higher RH (e.g., at 263 K, O/C ratio = 0.55 and 0.40, at RH = 10 and 80%, respectively). By modeling particle growth using an aerosol growth model, which accounts for kinetic limitations, we can explain the enhancement in the semi-volatile fraction through the complementary effect of decreased compound activity and increased bulk-phase diffusivity. Our results highlight the importance of particle water content as a diluting agent and a plasticizer for organic aerosol growth.
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Affiliation(s)
- Mihnea Surdu
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Houssni Lamkaddam
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Dongyu S. Wang
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - David M. Bell
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Mao Xiao
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Chuan Ping Lee
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Dandan Li
- Université
de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 69626 Villeurbanne, France
| | - Lucía Caudillo
- Institute
for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Guillaume Marie
- Institute
for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Wiebke Scholz
- Institute
for Ion and Applied Physics, University
of Innsbruck, 6020 Innsbruck, Austria
| | - Mingyi Wang
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, Pasadena, 91125 California, United States
- Center for
Atmospheric Particle Studies, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, 15213 Pennsylvania, United States
| | - Brandon Lopez
- Center for
Atmospheric Particle Studies, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, 15213 Pennsylvania, United States
| | | | - Farnoush Ataei
- Department
of Experimental Aerosol and Cloud Microphysics, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Rima Baalbaki
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Barbara Bertozzi
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Pia Bogert
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Zoé Brasseur
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Lubna Dada
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Jonathan Duplissy
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
- Helsinki Institute of Physics, University
of Helsinki, 00014 Helsinki, Finland
| | - Henning Finkenzeller
- Department
of Chemistry & CIRES, University
of Colorado Boulder, UCB 215, Boulder, 80309-0215 Colorado, United States
| | - Xu-Cheng He
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Kristina Höhler
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Kimmo Korhonen
- Department of Applied Physics, University
of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | | | - Katrianne Lehtipalo
- Finnish
Meteorological Institute, 00560 Helsinki, Finland
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Naser G. A. Mahfouz
- Atmospheric and Oceanic Sciences, Princeton
University, Princeton, 08540 New Jersey, United States
| | - Hanna E. Manninen
- CERN,
the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Ruby Marten
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Dario Massabò
- Department of Physics, University of Genoa
& INFN, 16146 Genoa, Italy
| | - Roy Mauldin
- Department
of Chemistry, Carnegie Mellon
University, 4400 Fifth
Avenue, Pittsburgh, 15213 Pennsylvania, United States
- Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, UCB 311, Boulder, 80309 Colorado, United
States
| | - Tuukka Petäjä
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Joschka Pfeifer
- CERN,
the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Maxim Philippov
- P. N. Lebedev Physical Institute of the
Russian Academy of Sciences, 119991 Moscow, Russia
| | - Birte Rörup
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Mario Simon
- Institute
for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Jiali Shen
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Nsikanabasi Silas Umo
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Franziska Vogel
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Stefan K. Weber
- Institute
for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
- CERN,
the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Marcel Zauner-Wieczorek
- Institute
for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Rainer Volkamer
- Department
of Chemistry & CIRES, University
of Colorado Boulder, UCB 215, Boulder, 80309-0215 Colorado, United States
| | - Harald Saathoff
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Ottmar Möhler
- Institute
of Meteorology and Climate Research, Karlsruhe
Institute of Technology, 76021 Karlsruhe, Germany
| | - Jasper Kirkby
- CERN,
the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Douglas R. Worsnop
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
- Aerodyne Research, Inc., Billerica, 01821 Massachusetts, United States
| | - Markku Kulmala
- Institute
for Atmospheric and Earth System Research (INAR)/Physics, Faculty
of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Frank Stratmann
- Department
of Experimental Aerosol and Cloud Microphysics, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Armin Hansel
- Institute
for Ion and Applied Physics, University
of Innsbruck, 6020 Innsbruck, Austria
| | - Joachim Curtius
- Institute
for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - André Welti
- Finnish
Meteorological Institute, 00560 Helsinki, Finland
| | - Matthieu Riva
- Université
de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 69626 Villeurbanne, France
- Tofwerk AG, CH-3600 Thun, Switzerland
| | - Neil M. Donahue
- Center for
Atmospheric Particle Studies, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, 15213 Pennsylvania, United States
| | - Urs Baltensperger
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Imad El Haddad
- Laboratory
of Atmospheric Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
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3
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Neururer F, Liu S, Leitner D, Baltrun M, Fisher KR, Kopacka H, Wurst K, Daumann LJ, Munz D, Hohloch S. Mesoionic Carbenes in Low- to High-Valent Vanadium Chemistry. Inorg Chem 2021; 60:15421-15434. [PMID: 34590834 PMCID: PMC8527456 DOI: 10.1021/acs.inorgchem.1c02087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Indexed: 12/12/2022]
Abstract
We report the synthesis of vanadium(V) oxo complex 1 with a pincer-type dianionic mesoionic carbene (MIC) ligand L1 and the general formula [VOCl(L1)]. A comparison of the structural (SC-XRD), electronic (UV-vis), and electrochemical (cyclic voltammetry) properties of 1 with the benzimidazolinylidene congener 2 (general formula [VOCl(L2)]) shows that the MIC is a stronger donor also for early transition metals with low d-electron population. Since electrochemical studies revealed both complexes to be reversibly reduced, the stronger donor character of MICs was not only demonstrated for the vanadium(V) but also for the vanadium(IV) oxidation state by isolating the reduced vanadium(IV) complexes [Co(Cp*)2][1] and [Co(Cp*)2][2] ([Co(Cp*)2] = decamethylcobaltocenium). The electronic structures of the compounds were investigated by computational methods. Complex 1 was found to be a moderate precursor for salt metathesis reactions, showing selective reactivity toward phenolates or secondary amides, but not toward primary amides and phosphides, thiophenols, or aryls/alkyls donors. Deoxygenation with electron-rich phosphines failed to give the desired vanadium(III) complex. However, treatment of the deprotonated ligand precursor with vanadium(III) trichloride resulted in the clean formation of the corresponding MIC vanadium(III) complex 6, which undergoes a clean two-electron oxidation with organic azides yielding the corresponding imido complexes. The reaction with TMS-N3 did not afford a nitrido complex, but instead the imido complex 10. This study reveals that, contrary to popular belief, MICs are capable of supporting early transition-metal complexes in a variety of oxidation states, thus making them promising candidates for the activation of small molecules and redox catalysis.
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Affiliation(s)
- Florian
R. Neururer
- Institute
of Inorganic, General and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Shenyu Liu
- Faculty
of Science, Department of Chemistry, University
of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
| | - Daniel Leitner
- Institute
of Inorganic, General and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Marc Baltrun
- Faculty
of Science, Department of Chemistry, University
of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
| | - Katherine R. Fisher
- Department
Chemie, Ludwigs-Maximilians-University Munich, Butenandtstraße 5-13 Haus D, 81377 Munich, Germany
| | - Holger Kopacka
- Institute
of Inorganic, General and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Klaus Wurst
- Institute
of Inorganic, General and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Lena J. Daumann
- Department
Chemie, Ludwigs-Maximilians-University Munich, Butenandtstraße 5-13 Haus D, 81377 Munich, Germany
| | - Dominik Munz
- Fakultät
NT, Inorganic Chemistry: Coordination Chemistry, Saarland University, Campus C4.1, 66123 Saarbrücken, Germany
| | - Stephan Hohloch
- Institute
of Inorganic, General and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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4
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van Pijkeren A, Dietze J, Brotons AS, Egger AS, Lijster T, Barcaru A, Hotze M, Kobler P, Dekker FJ, Horvatovich P, Melgert BN, Ziegler M, Thedieck K, Heiland I, Bischoff R, Kwiatkowski M. Combined Metabolic and Chemical (CoMetChem) Labeling Using Stable Isotopes-a Strategy to Reveal Site-Specific Histone Acetylation and Deacetylation Rates by LC-MS. Anal Chem 2021; 93:12872-12880. [PMID: 34519498 PMCID: PMC8482368 DOI: 10.1021/acs.analchem.1c01359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Indexed: 12/26/2022]
Abstract
Histone acetylation is an important, reversible post-translational protein modification and a hallmark of epigenetic regulation. However, little is known about the dynamics of this process, due to the lack of analytical methods that can capture site-specific acetylation and deacetylation reactions. We present a new approach that combines metabolic and chemical labeling (CoMetChem) using uniformly 13C-labeled glucose and stable isotope-labeled acetic anhydride. Thereby, chemically equivalent, fully acetylated histone species are generated, enabling accurate relative quantification of site-specific lysine acetylation dynamics in tryptic peptides using high-resolution mass spectrometry. We show that CoMetChem enables site-specific quantification of the incorporation or loss of lysine acetylation over time, allowing the determination of reaction rates for acetylation and deacetylation. Thus, the CoMetChem methodology provides a comprehensive description of site-specific acetylation dynamics.
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Affiliation(s)
- Alienke van Pijkeren
- Institute
of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck 6020, Austria
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Jörn Dietze
- Department
of Arctic and Marine Biology, UiT The Arctic
University of Norway, Tromsø 9037, Norway
| | - Alejandro Sánchez Brotons
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Anna-Sophia Egger
- Institute
of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck 6020, Austria
| | - Tim Lijster
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Andrei Barcaru
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Madlen Hotze
- Institute
of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck 6020, Austria
| | - Philipp Kobler
- Institute
of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck 6020, Austria
| | - Frank J. Dekker
- Chemical
and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Peter Horvatovich
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Barbro N. Melgert
- Department
of Molecular Pharmacology, Groningen Research Institute for Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
- Groningen
Research Institute for Asthma and COPD, University Medical Center
Groningen, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Mathias Ziegler
- Department
of Biomedicine, University of Bergen, Bergen 5009, Norway
| | - Kathrin Thedieck
- Institute
of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck 6020, Austria
- Department
of Pediatrics, Section Systems Medicine of Metabolism and Signaling, University of Groningen, University Medical Center
Groningen, Groningen 9700 RB, The Netherlands
- Department for Neuroscience, School of Medicine and
Health Sciences, Carl von Ossietzky University
Oldenburg, Oldenburg 26129, Germany
| | - Ines Heiland
- Department
of Arctic and Marine Biology, UiT The Arctic
University of Norway, Tromsø 9037, Norway
- Neuro-SysMed,
Department of Neurology, Haukeland University Hospital, Bergen, Norway,
Department of Clinical Medicine, University
of Bergen, Bergen 5021, Norway
| | - Rainer Bischoff
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
| | - Marcel Kwiatkowski
- Institute
of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck 6020, Austria
- Department
of Analytical Biochemistry and Interfaculty Mass Spectrometry Center,
Groningen Research Institute of Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
- Department
of Molecular Pharmacology, Groningen Research Institute for Pharmacy, University of Groningen, Groningen 9700 AD, The Netherlands
- Groningen
Research Institute for Asthma and COPD, University Medical Center
Groningen, University of Groningen, Groningen 9700 AD, The Netherlands
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