1
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Ivanova A, Badertscher L, O'Driscoll G, Bergman J, Gordon E, Gunnarsson A, Johansson C, Munson MJ, Spinelli C, Torstensson S, Vilén L, Voirel A, Wiseman J, Rak J, Dekker N, Lázaro-Ibáñez E. Creating Designer Engineered Extracellular Vesicles for Diverse Ligand Display, Target Recognition, and Controlled Protein Loading and Delivery. Adv Sci (Weinh) 2023; 10:e2304389. [PMID: 37867228 DOI: 10.1002/advs.202304389] [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] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/19/2023] [Indexed: 10/24/2023]
Abstract
Efficient and targeted delivery of therapeutic agents remains a bottleneck in modern medicine. Here, biochemical engineering approaches to advance the repurposing of extracellular vesicles (EVs) as drug delivery vehicles are explored. Targeting ligands such as the sugar GalNAc are displayed on the surface of EVs using a HaloTag-fused to a protein anchor that is enriched on engineered EVs. These EVs are successfully targeted to human primary hepatocytes. In addition, the authors are able to decorate EVs with an antibody that recognizes a GLP1 cell surface receptor by using an Fc and Fab region binding moiety fused to an anchor protein, and they show that this improves EV targeting to cells that overexpress the receptor. The authors also use two different protein-engineering approaches to improve the loading of Cre recombinase into the EV lumen and demonstrate that functional Cre protein is delivered into cells in the presence of chloroquine, an endosomal escape enhancer. Lastly, engineered EVs are well tolerated upon intravenous injection into mice without detectable signs of liver toxicity. Collectively, the data show that EVs can be engineered to improve cargo loading and specific cell targeting, which will aid their transformation into tailored drug delivery vehicles.
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Affiliation(s)
- Alena Ivanova
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Lukas Badertscher
- Translational Genomics, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Gwen O'Driscoll
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
- Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Joakim Bergman
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Euan Gordon
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Anders Gunnarsson
- Structure and Biophysics, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Camilla Johansson
- Clinical Pharmacology and Safety Sciences, Sweden Imaging Hub, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Michael J Munson
- Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Cristiana Spinelli
- Research Institute of the McGill University Health Centre, Glen Site, McGill University, Montreal, Quebec, H4A 3J1, Canada
| | - Sara Torstensson
- Translational Genomics, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Liisa Vilén
- DMPK, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Andrei Voirel
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - John Wiseman
- Translational Genomics, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Janusz Rak
- Research Institute of the McGill University Health Centre, Glen Site, McGill University, Montreal, Quebec, H4A 3J1, Canada
| | - Niek Dekker
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
| | - Elisa Lázaro-Ibáñez
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
- Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, Mölndal, 431 50, Sweden
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2
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Ripa L, Sandmark J, Hughes G, Shamovsky I, Gunnarsson A, Johansson J, Llinas A, Collins M, Jung B, Novén A, Pemberton N, Mogemark M, Xiong Y, Li Q, Tångefjord S, Ek M, Åstrand A. Selective and Bioavailable HDAC6 2-(Difluoromethyl)-1,3,4-oxadiazole Substrate Inhibitors and Modeling of Their Bioactivation Mechanism. J Med Chem 2023; 66:14188-14207. [PMID: 37797307 DOI: 10.1021/acs.jmedchem.3c01269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Histone deacetylase 6 (HDAC6) is a unique member of the HDAC family mainly targeting cytosolic nonhistone substrates, such as α-tubulin, cortactin, and heat shock protein 90 to regulate cell proliferation, metastasis, invasion, and mitosis in tumors. We describe the identification and characterization of a series of 2-(difluoromethyl)-1,3,4-oxadiazoles (DFMOs) as selective nonhydroxamic acid HDAC6 inhibitors. By comparing structure-activity relationships and performing quantum mechanical calculations of the HDAC6 catalytic mechanism, we show that potent oxadiazoles are electrophilic substrates of HDAC6 and propose a mechanism for the bioactivation. We also observe that the inherent electrophilicity of the oxadiazoles makes them prone to degradation in water solution and the generation of potentially toxic products cannot be ruled out, limiting the developability for chronic diseases. However, the oxadiazoles demonstrate high oral bioavailability and low in vivo clearance and are excellent tools for studying the role of HDAC6 in vitro and in vivo in rats and mice.
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Affiliation(s)
- Lena Ripa
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Jenny Sandmark
- Discovery Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Glyn Hughes
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Igor Shamovsky
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Julia Johansson
- Clinical Pharmacology and Safety Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Antonio Llinas
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Mia Collins
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Bomi Jung
- Discovery Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Anna Novén
- Discovery Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Nils Pemberton
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Mickael Mogemark
- Clinical Pharmacology and Safety Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Yao Xiong
- Pharmaron Beijing, Co. Ltd., No. 6, Taihe Road, BDA, Beijing 100176, China
| | - Qing Li
- Pharmaron Beijing, Co. Ltd., No. 6, Taihe Road, BDA, Beijing 100176, China
| | - Stefan Tångefjord
- Discovery Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Margareta Ek
- Discovery Sciences, Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Annika Åstrand
- Respiratory & Immunology (R&I), Research and Early Development, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
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3
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Iegre J, Krajcovicova S, Gunnarsson A, Wissler L, Käck H, Luchniak A, Tångefjord S, Narjes F, Spring DR. A cell-active cyclic peptide targeting the Nrf2/Keap1 protein-protein interaction. Chem Sci 2023; 14:10800-10805. [PMID: 37829032 PMCID: PMC10566475 DOI: 10.1039/d3sc04083f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 09/19/2023] [Indexed: 10/14/2023] Open
Abstract
The disruption of the protein-protein interaction (PPI) between Nrf2 and Keap1 is an attractive strategy to counteract the oxidative stress that characterises a variety of severe diseases. Peptides represent a complementary approach to small molecules for the inhibition of this therapeutically important PPI. However, due to their polar nature and the negative net charge required for binding to Keap1, the peptides reported to date exhibit either mid-micromolar activity or are inactive in cells. Herein, we present a two-component peptide stapling strategy to rapidly access a variety of constrained and functionalised peptides that target the Nrf2/Keap1 PPI. The most promising peptide, P8-H containing a fatty acid tag, binds to Keap1 with nanomolar affinity and is effective at inducing transcription of ARE genes in a human lung epithelial cell line at sub-micromolar concentration. Furthermore, crystallography of the peptide in complex with Keap1 yielded a high resolution X-ray structure, adding to the toolbox of structures available to develop cell-permeable peptidomimetic inhibitors.
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Affiliation(s)
- Jessica Iegre
- Yusuf Hamied Department of Chemistry Lensfield Road CB2 1EW Cambridge UK
| | - Sona Krajcovicova
- Yusuf Hamied Department of Chemistry Lensfield Road CB2 1EW Cambridge UK
- Department of Organic Chemistry, Palacky University Olomouc Tr. 17. Listopadu 12 77900 Olomouc Czech Republic
| | - Anders Gunnarsson
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca Pepparedsleden 1 43183 Gothenburg Sweden
| | - Lisa Wissler
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca Pepparedsleden 1 43183 Gothenburg Sweden
| | - Helena Käck
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca Pepparedsleden 1 43183 Gothenburg Sweden
| | - Anna Luchniak
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca Pepparedsleden 1 43183 Gothenburg Sweden
| | - Stefan Tångefjord
- BioScience, Research & Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca Pepparedsleden 1 43183 Gothenburg Sweden
| | - Frank Narjes
- Medicinal Chemistry, Research & Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca Pepparedsleden 1 43183 Gothenburg Sweden
| | - David R Spring
- Yusuf Hamied Department of Chemistry Lensfield Road CB2 1EW Cambridge UK
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4
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Whitehurst BC, Bauer MR, Edfeldt F, Gunnarsson A, Margreitter C, Rawlins PB, Storer RI. Design and Evaluation of a Low Hydrogen Bond Donor Count Fragment Screening Set to Aid Hit Generation of PROTACs Intended for Oral Delivery. J Med Chem 2023. [PMID: 37224440 DOI: 10.1021/acs.jmedchem.3c00493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The development of orally bioavailable PROTACs presents a significant challenge due to the inflated physicochemical properties of such heterobifunctional molecules. Molecules occupying this "beyond rule of five" space often demonstrate limited oral bioavailability due to the compounding effects of elevated molecular weight and hydrogen bond donor count (among other properties), but it is possible to achieve sufficient oral bioavailability through physicochemical optimization. Herein, we disclose the design and evaluation of a low hydrogen bond donor count (≤1 HBD) fragment screening set to aid hit generation of PROTACs intended for an oral route of delivery. We demonstrate that application of this library can enhance fragment screens against PROTAC proteins of interest and ubiquitin ligases, yielding fragment hits containing ≤1 HBD suitable for optimizing toward orally bioavailable PROTACs.
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Affiliation(s)
- Benjamin C Whitehurst
- Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, United Kingdom
| | - Matthias R Bauer
- Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, United Kingdom
| | - Fredrik Edfeldt
- Mechanistic and Structural Biology, Discovery Sciences, R&D, AstraZeneca, Mölndal, Gothenburg 431 50, Sweden
| | - Anders Gunnarsson
- Mechanistic and Structural Biology, Discovery Sciences, R&D, AstraZeneca, Mölndal, Gothenburg 431 50, Sweden
| | - Christian Margreitter
- Molecular AI, Discovery Sciences, R&D, AstraZeneca, Mölndal, Gothenburg 431 50, Sweden
| | - Philip B Rawlins
- Mechanistic and Structural Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, United Kingdom
| | - R Ian Storer
- Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, United Kingdom
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5
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Postel S, Wissler L, Johansson CA, Gunnarsson A, Gordon E, Collins B, Castaldo M, Köhler C, Öling D, Johansson P, Fröderberg Roth L, Beinsteiner B, Dainty I, Delaney S, Klaholz BP, Billas IML, Edman K. Quaternary glucocorticoid receptor structure highlights allosteric interdomain communication. Nat Struct Mol Biol 2023; 30:286-295. [PMID: 36747092 DOI: 10.1038/s41594-022-00914-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 12/15/2022] [Indexed: 02/08/2023]
Abstract
The glucocorticoid receptor (GR) is a ligand-activated transcription factor that binds DNA and assembles co-regulator complexes to regulate gene transcription. GR agonists are widely prescribed to people with inflammatory and autoimmune diseases. Here we present high-resolution, multidomain structures of GR in complex with ligand, DNA and co-regulator peptide. The structures reveal how the receptor forms an asymmetric dimer on the DNA and provide a detailed view of the domain interactions within and across the two monomers. Hydrogen-deuterium exchange and DNA-binding experiments demonstrate that ligand-dependent structural changes are communicated across the different domains in the full-length receptor. This study demonstrates how GR forms a distinct architecture on DNA and how signal transmission can be modulated by the ligand pharmacophore, provides a platform to build a new level of understanding of how receptor modifications can drive disease progression and offers key insight for future drug design.
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Affiliation(s)
- Sandra Postel
- Mechanistic & Structural Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Lisa Wissler
- Mechanistic & Structural Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Carina A Johansson
- Mechanistic & Structural Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Anders Gunnarsson
- Mechanistic & Structural Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Euan Gordon
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Barry Collins
- Bioscience COPD/IPF, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Marie Castaldo
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Christian Köhler
- Bioscience COPD/IPF, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - David Öling
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Patrik Johansson
- Mechanistic & Structural Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | | | - Brice Beinsteiner
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institute of Genetics and of Molecular and Cellular Biology (IGBMC), Illkirch, France
- Université de Strasbourg, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), Illkirch, France
- Centre National de la Recherche Scientifique (CNRS) UMR 7104, Illkirch, France
| | - Ian Dainty
- Bioscience COPD/IPF, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Stephen Delaney
- Bioscience COPD/IPF, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Bruno P Klaholz
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institute of Genetics and of Molecular and Cellular Biology (IGBMC), Illkirch, France
- Université de Strasbourg, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), Illkirch, France
- Centre National de la Recherche Scientifique (CNRS) UMR 7104, Illkirch, France
| | - Isabelle M L Billas
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institute of Genetics and of Molecular and Cellular Biology (IGBMC), Illkirch, France
- Université de Strasbourg, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), Illkirch, France
- Centre National de la Recherche Scientifique (CNRS) UMR 7104, Illkirch, France
| | - Karl Edman
- Mechanistic & Structural Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden.
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6
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Ilahibaks NF, Ardisasmita AI, Xie S, Gunnarsson A, Brealey J, Vader P, de Jong OG, de Jager S, Dekker N, Peacock B, Schiffelers RM, Sluijter JPG, Lei Z. TOP-EVs: Technology of Protein delivery through Extracellular Vesicles is a versatile platform for intracellular protein delivery. J Control Release 2023; 355:579-592. [PMID: 36746337 DOI: 10.1016/j.jconrel.2023.02.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [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: 04/11/2022] [Revised: 01/17/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023]
Abstract
Extracellular vesicles (EVs) have emerged as biocompatible drug delivery vehicles due to their native ability to deliver bioactive cargo to recipient cells. However, the application of EVs as a therapeutic delivery vehicle is hampered by effective methods for endogenously loading target proteins inside EVs and unloading proteins after delivery to recipient cells. Most EV-based engineered loading methods have a limited delivery efficiency owing to their inefficient endosomal escape or cargo release from the intraluminal attachment from the EV membrane. Here, we describe the 'Technology Of Protein delivery through Extracellular Vesicles' (TOP-EVs) as a tool for efficient intracellular delivery of target proteins mediated via EVs. The vesicular stomatitis virus glycoprotein and the rapamycin-heterodimerization of the FKBP12/T82L mutant FRB proteins were both important for the effective protein delivery through TOP-EVs. We showed that TOP-EVs could efficiently deliver Cre recombinase and CRISPR/Cas9 ribonucleoprotein complex in vitro. Moreover, our results demonstrated that the capacity of TOP-EVs to deliver intracellular proteins in recipient cells was not an artifact of plasmid contamination or direct plasmid loading into EVs. Finally, we showed that TOP-EVs could successfully mediate intracellular protein delivery in the liver in vivo. Taken together, TOP-EVs are a versatile platform for efficient intracellular protein delivery in vitro and in vivo, which can be applied to advance the development of protein-based therapeutics.
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Affiliation(s)
- Nazma F Ilahibaks
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands
| | - Arif I Ardisasmita
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands
| | - Songpu Xie
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands
| | - Anders Gunnarsson
- Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca, Mölndal 43183, Sweden
| | - Joseph Brealey
- NanoFCM Co., Ltd, MediCity, D6 Thane Road, Nottingham NG906BH, United Kingdom
| | - Pieter Vader
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands; CDL Research, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands
| | - Olivier G de Jong
- Department of Pharmaceutics, Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Utrecht 3584 CG, the Netherlands
| | - Saskia de Jager
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands
| | - Niek Dekker
- Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca, Mölndal 43183, Sweden
| | - Ben Peacock
- NanoFCM Co., Ltd, MediCity, D6 Thane Road, Nottingham NG906BH, United Kingdom
| | | | - Joost P G Sluijter
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands; Circulatory Health Laboratory, Regenerative Medicine Center, University Medical Center Utrecht, University Utrecht, Utrecht 3584 CX, the Netherlands.
| | - Zhiyong Lei
- Laboratory of Experimental Cardiology, Department Heart & Lungs, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands; CDL Research, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands.
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7
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Pallesen J, Munier CC, Bosica F, Andrei SA, Edman K, Gunnarsson A, La Sala G, Putra OD, Srdanović S, Wilson AJ, Wissler L, Ottmann C, Perry MWD, O’Mahony G. Correction to "Designing Selective Drug-like Molecular Glues for the Glucocorticoid Receptor/14-3-3 Protein-Protein Interaction". J Med Chem 2023; 66:2205-2207. [PMID: 36708352 PMCID: PMC9923739 DOI: 10.1021/acs.jmedchem.3c00076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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8
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Pallesen J, Munier CC, Bosica F, Andrei SA, Edman K, Gunnarsson A, La Sala G, Putra OD, Srdanović S, Wilson AJ, Wissler L, Ottmann C, Perry MWD, O’Mahony G. Designing Selective Drug-like Molecular Glues for the Glucocorticoid Receptor/14-3-3 Protein-Protein Interaction. J Med Chem 2022; 65:16818-16828. [PMID: 36484727 PMCID: PMC9791658 DOI: 10.1021/acs.jmedchem.2c01635] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The ubiquitously expressed glucocorticoid receptor (GR) is a nuclear receptor that controls a broad range of biological processes and is activated by steroidal glucocorticoids such as hydrocortisone or dexamethasone. Glucocorticoids are used to treat a wide variety of conditions, from inflammation to cancer but suffer from a range of side effects that motivate the search for safer GR modulators. GR is also regulated outside the steroid-binding site through protein-protein interactions (PPIs) with 14-3-3 adapter proteins. Manipulation of these PPIs will provide insights into noncanonical GR signaling as well as a new level of control over GR activity. We report the first molecular glues that selectively stabilize the 14-3-3/GR PPI using the related nuclear receptor estrogen receptor α (ERα) as a selectivity target to drive design. These 14-3-3/GR PPI stabilizers can be used to dissect noncanonical GR signaling and enable the development of novel atypical GR modulators.
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Affiliation(s)
- Jakob
S. Pallesen
- Medicinal
Chemistry, Research and Early Development, Cardiovascular, Renal and
Metabolism, Biopharmaceuticals R&D,
AstraZeneca, Pepparedsleden
1, 43183 Mölndal, Sweden
| | - Claire C. Munier
- Medicinal
Chemistry, Research and Early Development, Respiratory & Immunology, Biopharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Francesco Bosica
- Medicinal
Chemistry, Research and Early Development, Cardiovascular, Renal and
Metabolism, Biopharmaceuticals R&D,
AstraZeneca, Pepparedsleden
1, 43183 Mölndal, Sweden
| | - Sebastian A. Andrei
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Technische
Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Karl Edman
- Discovery
Sciences, Biopharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Anders Gunnarsson
- Discovery
Sciences, Biopharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Giuseppina La Sala
- Medicinal
Chemistry, Research and Early Development, Cardiovascular, Renal and
Metabolism, Biopharmaceuticals R&D,
AstraZeneca, Pepparedsleden
1, 43183 Mölndal, Sweden
| | - Okky Dwichandra Putra
- Early
Product Development and Manufacturing, Pharmaceutical
Sciences R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Sonja Srdanović
- School
of
Chemistry, Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, West
Yorkshire LS2 9JT, U.K.
| | - Andrew J. Wilson
- School
of
Chemistry, Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, West
Yorkshire LS2 9JT, U.K.
| | - Lisa Wissler
- Discovery
Sciences, Biopharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Christian Ottmann
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Technische
Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Matthew W. D. Perry
- Medicinal
Chemistry, Research and Early Development, Respiratory & Immunology, Biopharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183 Mölndal, Sweden
| | - Gavin O’Mahony
- Medicinal
Chemistry, Research and Early Development, Cardiovascular, Renal and
Metabolism, Biopharmaceuticals R&D,
AstraZeneca, Pepparedsleden
1, 43183 Mölndal, Sweden,
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9
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Ghosh A, Hande SM, Balazs A, Barratt D, Cosulich S, Davies B, Degorce S, Embrey K, Gill S, Gunnarsson A, Illuzzi G, Johnström P, Lane J, Larner C, Lawrence R, Leo E, Madin A, Martin E, McWilliams L, O’Connor L, O’Connor M, Orme J, Pachl F, Packer M, Pike A, Rawlins P, Schimpl M, Schou M, Staniszewska A, Yang W, Yates J, Zhang A, Zheng X, Fawell S, Hamerlik P, Johannes J. Abstract 6302: Structure-based and property-based drug design of AZD9574, a CNS penetrant PARP1 selective inhibitor and trapper. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-6302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
PARP inhibitors exploit defects in DNA repair pathways to selectively target cancerous cells via PARP1 catalytic inhibition and PARP1 trapping onto the DNA. All known clinical PARP1 inhibitors bind at the same site at the catalytic center of the enzyme. However, despite this resemblance they show immensely different outcomes in terms of response rate in the clinic due to their varying degree of PARP trapping ability. Moreover, the first-generation PARP inhibitors were not optimized for selectivity across the PARP family potentially driving undesirable side effects, including intestinal toxicity from tankyrase inhibition or hematological toxicity from PARP2 inhibition. There has been strong rationale for the use of PARP inhibitors in neuro-oncology. However, the first-generation PARP inhibitors have limited CNS distribution as these drugs were not designed for brain penetration. Recently AstraZeneca has reported the discovery of AZD5305, a next generation PARP1 selective inhibitor and PARP1-DNA trapper which was not designed with a CNS penetrant profile. Given the unmet need of a brain penetrant PARP1 inhibitor, we set out to identify a highly potent and selective PARP1 inhibitor and trapper with CNS profile. In our next generation PARP1 inhibitor, we sought to retain the profile of AZD5305 and lower the efflux for CNS penetration. Despite the challenge of narrow SAR, we successfully used the structure- and property-based design approach to identify a brain penetrant PARP1 inhibitor and PARP1-DNA trapper. We used multiple medicinal chemistry maneuvers such as masking the hydrogen bond donors and core modifications to lower the efflux in order to achieve brain penetration. Further optimization of the nicotinamide mimetic core for potency and metabolic stability led us to the discovery of AZD9574.AZD9574 shows improved selectivity for PARP1 over PARP2 vs AZD5305 and retains its excellent selectivity over other PARP family members. It has low efflux in Caco2, MDCK-MDR1, and MDCK-MDR1-BCRP permeability assays and it also showed CNS penetration in rat and cynomolgus monkey. AZD9574 has excellent secondary pharmacology and acceptable physicochemical properties and good PK in preclinical species.In vitro, AZD9574 selectively inhibits the growth of BRCAm cell lines. Importantly, AZD9574 showed efficacy in an intracranial BRCA1m MDA-MB-436 xenograft model at doses of 3, 10 and 30 mg/kg QD, significantly extending the survival of tumor-bearing mice compared to vehicle control arm.In summary, AZD9574 is a next generation selective PARP1 inhibitor and trapper with CNS penetration. This profile makes it an ideal candidate for treating CNS malignancies or brain metastases that have a dependence on PARP inhibition either as single agent or in combination with other therapies.
Citation Format: Avipsa Ghosh, Sudhir M. Hande, Amber Balazs, Derek Barratt, Sabina Cosulich, Barry Davies, Sébastien Degorce, Kevin Embrey, Sonja Gill, Anders Gunnarsson, Giuditta Illuzzi, Peter Johnström, Jordan Lane, Carrie Larner, Rachel Lawrence, Elisabetta Leo, Andrew Madin, Elizabeth Martin, Lisa McWilliams, Lenka O’Connor, Mark O’Connor, Jonathan Orme, Fiona Pachl, Martin Packer, Andy Pike, Philip Rawlins, Marianne Schimpl, Magnus Schou, Anna Staniszewska, Wenzhan Yang, James Yates, Andrew Zhang, XiaoLa Zheng, Stephen Fawell, Petra Hamerlik, Jeffrey Johannes. Structure-based and property-based drug design of AZD9574, a CNS penetrant PARP1 selective inhibitor and trapper [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 6302.
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Affiliation(s)
| | | | | | - Derek Barratt
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | - Barry Davies
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | - Kevin Embrey
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | - Sonja Gill
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | | | | | - Jordan Lane
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | - Carrie Larner
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | | | - Andrew Madin
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | | | | | - Mark O’Connor
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | - Jonathan Orme
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | - Martin Packer
- 5AstraZeneca Pharmaceuticals, Cambridg, United Kingdom
| | - Andy Pike
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
| | | | | | | | | | | | - James Yates
- 2AstraZeneca Pharmaceuticals, Cambridge, United Kingdom
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10
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Gutgsell A, Gunnarsson A, Forssén P, Gordon E, Fornstedt T, Geschwindner S. Biosensor-Enabled Deconvolution of the Avidity-Induced Affinity Enhancement for the SARS-CoV-2 Spike Protein and ACE2 Interaction. Anal Chem 2022; 94:1187-1194. [PMID: 34964599 PMCID: PMC8751012 DOI: 10.1021/acs.analchem.1c04372] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 10/08/2021] [Accepted: 12/15/2021] [Indexed: 12/12/2022]
Abstract
Avidity is an effective and frequent phenomenon employed by nature to achieve extremely high-affinity interactions. As more drug discovery efforts aim to disrupt protein-protein interactions, it is becoming increasingly common to encounter systems that utilize avidity effects and to study these systems using surface-based technologies, such as surface plasmon resonance (SPR) or biolayer interferometry. However, heterogeneity introduced from multivalent binding interactions complicates the analysis of the resulting sensorgram. A frequently applied practice is to fit the data based on a 1:1 binding model, and if the fit does not describe the data adequately, then the experimental setup is changed to favor a 1:1 binding interaction. This reductionistic approach is informative but not always biologically relevant. Therefore, we aimed to develop an SPR-based assay that would reduce the heterogeneity to enable the determination of the kinetic rate constants for multivalent binding interactions using the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein and the human receptor angiotensin-converting enzyme 2 (ACE2) as a model system. We employed a combinatorial approach to generate a sensor surface that could distinguish between monovalent and multivalent interactions. Using advanced data analysis algorithms to analyze the resulting sensorgrams, we found that controlling the surface heterogeneity enabled the deconvolution of the avidity-induced affinity enhancement for the SARS-CoV-2 spike protein and ACE2 interaction.
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Affiliation(s)
- Aspen
Rene Gutgsell
- Mechanistic
& Structural Biology, Discovery Sciences, R&D, AstraZeneca, SE-431 83 Mölndal, Sweden
| | - Anders Gunnarsson
- Mechanistic
& Structural Biology, Discovery Sciences, R&D, AstraZeneca, SE-431 83 Mölndal, Sweden
| | - Patrik Forssén
- Department
of Engineering and Chemical Sciences, Karlstad
University, SE-651 88 Karlstad, Sweden
| | - Euan Gordon
- Discovery
Biology, Discovery Sciences, R&D, AstraZeneca, SE-431 83 Mölndal, Sweden
| | - Torgny Fornstedt
- Department
of Engineering and Chemical Sciences, Karlstad
University, SE-651 88 Karlstad, Sweden
| | - Stefan Geschwindner
- Mechanistic
& Structural Biology, Discovery Sciences, R&D, AstraZeneca, SE-431 83 Mölndal, Sweden
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11
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Yu Q, England RM, Gunnarsson A, Luxenhofer R, Treacher K, Ashford MB. Designing Highly Stable Poly(sarcosine)-Based Telodendrimer Micelles with High Drug Content Exemplified with Fulvestrant. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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)
- Qing Yu
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Richard M. England
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 2NA, U.K
| | | | - Robert Luxenhofer
- Functional Polymer Materials, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, Würzburg University, Röntgenring 11, 97070 Würzburg, Germany
- Soft Matter Chemistry, Department of Chemistry and Helsinki Institute of Sustainability Science, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Kevin Treacher
- New Modalities and Parenterals Development, Pharmaceutical Technology and Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Marianne B. Ashford
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 2NA, U.K
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12
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Johannes JW, Balazs A, Barratt D, Bista M, Chuba MD, Cosulich S, Critchlow SE, Degorce SL, Di Fruscia P, Edmondson SD, Embrey K, Fawell S, Ghosh A, Gill SJ, Gunnarsson A, Hande SM, Heightman TD, Hemsley P, Illuzzi G, Lane J, Larner C, Leo E, Liu L, Madin A, Martin S, McWilliams L, O'Connor MJ, Orme JP, Pachl F, Packer MJ, Pei X, Pike A, Schimpl M, She H, Staniszewska AD, Talbot V, Underwood E, Varnes JG, Xue L, Yao T, Zhang K, Zhang AX, Zheng X. Discovery of 5-{4-[(7-Ethyl-6-oxo-5,6-dihydro-1,5-naphthyridin-3-yl)methyl]piperazin-1-yl}- N-methylpyridine-2-carboxamide (AZD5305): A PARP1-DNA Trapper with High Selectivity for PARP1 over PARP2 and Other PARPs. J Med Chem 2021; 64:14498-14512. [PMID: 34570508 DOI: 10.1021/acs.jmedchem.1c01012] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Poly-ADP-ribose-polymerase (PARP) inhibitors have achieved regulatory approval in oncology for homologous recombination repair deficient tumors including BRCA mutation. However, some have failed in combination with first-line chemotherapies, usually due to overlapping hematological toxicities. Currently approved PARP inhibitors lack selectivity for PARP1 over PARP2 and some other 16 PARP family members, and we hypothesized that this could contribute to toxicity. Recent literature has demonstrated that PARP1 inhibition and PARP1-DNA trapping are key for driving efficacy in a BRCA mutant background. Herein, we describe the structure- and property-based design of 25 (AZD5305), a potent and selective PARP1 inhibitor and PARP1-DNA trapper with excellent in vivo efficacy in a BRCA mutant HBCx-17 PDX model. Compound 25 is highly selective for PARP1 over other PARP family members, with good secondary pharmacology and physicochemical properties and excellent pharmacokinetics in preclinical species, with reduced effects on human bone marrow progenitor cells in vitro.
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Affiliation(s)
- Jeffrey W Johannes
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Amber Balazs
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Derek Barratt
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Michal Bista
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Matthew D Chuba
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Sabina Cosulich
- Oncology Projects, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | | | - Sébastien L Degorce
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | | | - Scott D Edmondson
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Kevin Embrey
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Stephen Fawell
- Oncology Discovery, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Avipsa Ghosh
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Sonja J Gill
- Oncology Safety, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Anders Gunnarsson
- Discovery Sciences, R&D Gothenburg, AstraZeneca, KJ2, Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Sudhir M Hande
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Tom D Heightman
- Chemistry, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Paul Hemsley
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | | | - Jordan Lane
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Carrie Larner
- Oncology Safety, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Elisabetta Leo
- Bioscience, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Lina Liu
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China
| | - Andrew Madin
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Scott Martin
- DMPK, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Lisa McWilliams
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Mark J O'Connor
- Bioscience, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Jonathan P Orme
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Fiona Pachl
- Discovery Sciences, R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Martin J Packer
- Computational Chemistry, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | - Xiaohui Pei
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China
| | - Andrew Pike
- DMPK, Oncology R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | | | - Hongyao She
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China
| | | | - Verity Talbot
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 OWG, U.K
| | | | - Jeffrey G Varnes
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Lin Xue
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China
| | - Tieguang Yao
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China
| | - Ke Zhang
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P. R. China
| | - Andrew X Zhang
- Discovery Sciences, R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Xiaolan Zheng
- Chemistry, Oncology R&D, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
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13
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Silva AM, Lázaro‐Ibáñez E, Gunnarsson A, Dhande A, Daaboul G, Peacock B, Osteikoetxea X, Salmond N, Friis KP, Shatnyeva O, Dekker N. Quantification of protein cargo loading into engineered extracellular vesicles at single-vesicle and single-molecule resolution. J Extracell Vesicles 2021; 10:e12130. [PMID: 34377376 PMCID: PMC8329990 DOI: 10.1002/jev2.12130] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [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: 10/14/2020] [Revised: 06/20/2021] [Accepted: 07/13/2021] [Indexed: 12/15/2022] Open
Abstract
Extracellular Vesicles (EVs) have been intensively explored for therapeutic delivery of proteins. However, methods to quantify cargo proteins loaded into engineered EVs are lacking. Here, we describe a workflow for EV analysis at the single-vesicle and single-molecule level to accurately quantify the efficiency of different EV-sorting proteins in promoting cargo loading into EVs. Expi293F cells were engineered to express EV-sorting proteins fused to green fluorescent protein (GFP). High levels of GFP loading into secreted EVs was confirmed by Western blotting for specific EV-sorting domains, but quantitative single-vesicle analysis by Nanoflow cytometry detected GFP in less than half of the particles analysed, reflecting EV heterogeneity. Anti-tetraspanin EV immunostaining in ExoView confirmed a heterogeneous GFP distribution in distinct subpopulations of CD63+, CD81+, or CD9+ EVs. Loading of GFP into individual vesicles was quantified by Single-Molecule Localization Microscopy. The combined results demonstrated TSPAN14, CD63 and CD63/CD81 fused to the PDGFRβ transmembrane domain as the most efficient EV-sorting proteins, accumulating on average 50-170 single GFP molecules per vesicle. In conclusion, we validated a set of complementary techniques suitable for high-resolution analysis of EV preparations that reliably capture their heterogeneity, and propose highly efficient EV-sorting proteins to be used in EV engineering applications.
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Affiliation(s)
- Andreia M. Silva
- Discovery BiologyDiscovery SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
| | - Elisa Lázaro‐Ibáñez
- Discovery BiologyDiscovery SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
- Advanced Drug DeliveryPharmaceutical SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
| | - Anders Gunnarsson
- Structure and BiophysicsDiscovery SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
| | | | | | | | - Xabier Osteikoetxea
- Discovery BiologyDiscovery SciencesBioPharmaceuticals R&DAstraZenecaAlderley ParkUK
| | - Nikki Salmond
- Discovery BiologyDiscovery SciencesBioPharmaceuticals R&DAstraZenecaAlderley ParkUK
| | - Kristina Pagh Friis
- Advanced Drug DeliveryPharmaceutical SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
| | - Olga Shatnyeva
- Discovery BiologyDiscovery SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
| | - Niek Dekker
- Discovery BiologyDiscovery SciencesBioPharmaceuticals R&DAstraZenecaGothenburgSweden
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14
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Hande S, Balazs A, Degorce SL, Embrey K, Ghosh A, Gill SJ, Gunnarsson A, Illuzzi G, Lane J, Larner C, Leo E, Madin A, McWilliams L, O'Connor MJ, Orme J, Pachl F, Packer M, Pike A, Rawlins P, Schimpl M, Staniszewska AD, Zhang A, Zheng X, Johannes JW. Abstract 296: Structure-based and property-based drug design of AZD5305, a highly selective PARP1 inhibitor and trapper. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Since the approval of olaparib in 2014 for BRCA mutated (BRCAm) ovarian cancer, many PARP inhibitors have been developed and have seen widespread success. However, as a class, these drugs are not without adverse events which have limited their ability to be combined with chemotherapy. Most first generation PARP inhibitors were developed and optimized before the concept of PARP1-DNA trapping was discovered as the mechanism by which PARP inhibitors exert their synthetic lethal effects on BRCAm cells. Moreover, the first generation PARP inhibitors were not optimized for selectivity across the PARP family potentially driving undesirable side effects, including intestinal toxicity from tankyrase inhibition or hematological toxicity from PARP2 inhibition. With this in mind, we set out to discover a best-in-class, second generation PARP inhibitor that was highly selective for PARP1 over the other 16 members of the PARP family, as well as a highly potent PARP1-DNA trapper.
PARP1 and PARP2 have a highly similar amino acid sequence, and most of the residues around the nicotinamide binding site are identical. However, there are some key residue differences in the helical domain which serves a regulator of the nicotinamide binding pocket. The publication of NMS-P118 in 2015 by Nerviano Medical Sciences showed that a highly selective PARP1 inhibitor could be found. This work inspired us to screen an extensive list of previously reported PARP inhibitors for selectivity against PARP2 and we found that FR257516 met the selectivity criteria as previously reported, but lacked the ability to trap PARP1 to DNA and hence lacked any activity in a cell colony formation assay in DLD-1 BRCA2-/- cells. Using parallel chemistry to generate diverse analogs, X-ray crystallography to enable structure-based design, and exploration of multiple nicotinamide mimetic cores, we were able to generate lead compound AZ4554, which was a PARP1 selective PARP1-DNA trapper with potent activity in BRCAm cells. Using concepts of property-based drug design, we were able to optimize lead compound AZ4554 into candidate drug AZD5305, making key improvements in secondary pharmacology, including reducing hERG activity, and intrinsic clearance in human microsomes through the introduction of polar atoms to lower logD without compromising permeability or oral bioavailability.
AZD5305 is a highly selective binder of PARP1 over PARP2 and other PARP enzymes by fluorescence polarization, surface plasmon resonance, and single molecule spectroscopy. It is highly potent against DLD-1 BRCA2-/- cells, while sparing isogenic BRCA WT cells. The secondary pharmacology of AZD5305 is remarkably clean, with hERG activity >40 µM. AZD5305 has a very favorable pre-clinical PK profile, low predicted human dose, and has shown efficacy in an MDA-MB-436 mouse xenograft model.
Citation Format: Sudhir Hande, Amber Balazs, Sébastien L. Degorce, Kevin Embrey, Avipsa Ghosh, Sonja J. Gill, Anders Gunnarsson, Giuditta Illuzzi, Jordan Lane, Carrie Larner, Elisabetta Leo, Andrew Madin, Lisa McWilliams, Mark J. O'Connor, Jonathan Orme, Fiona Pachl, Martin Packer, Andy Pike, Philip Rawlins, Marianne Schimpl, Anna D. Staniszewska, Andrew Zhang, Xiaolan Zheng, Jeffrey W. Johannes. Structure-based and property-based drug design of AZD5305, a highly selective PARP1 inhibitor and trapper [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 296.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Andy Pike
- 2AstraZeneca, Cambridge, United Kingdom
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15
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La Sala G, Gunnarsson A, Edman K, Tyrchan C, Hogner A, Frolov AI. Unraveling the Allosteric Cross-Talk between the Coactivator Peptide and the Ligand-Binding Site in the Glucocorticoid Receptor. J Chem Inf Model 2021; 61:3667-3680. [PMID: 34156843 DOI: 10.1021/acs.jcim.1c00323] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The glucocorticoid receptor (GR) is a nuclear receptor that controls critical biological processes by regulating the transcription of specific genes. There is a known allosteric cross-talk between the ligand and coregulator binding sites within the GR ligand-binding domain that is crucial for the control of the functional response. However, the molecular mechanisms underlying such an allosteric control remain elusive. Here, molecular dynamics (MD) simulations, bioinformatic analysis, and biophysical measurements are integrated to capture the structural and dynamic features of the allosteric cross-talk within the GR. We identified a network of evolutionarily conserved residues that enables the allosteric signal transduction, in agreement with experimental data. MD simulations clarify how such a network is dynamically interconnected and offer a mechanistic explanation of how different peptides affect the intensity of the allosteric signal. This study provides useful insights to elucidate the GR allosteric regulation, ultimately providing a foundation for designing novel drugs.
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Affiliation(s)
- Giuseppina La Sala
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Anders Gunnarsson
- Discovery Science, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Karl Edman
- Discovery Science, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Christian Tyrchan
- Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Anders Hogner
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Andrey I Frolov
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
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16
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Ulmefors H, Nissa J, Pace H, Wahlsten O, Gunnarsson A, Simon DT, Berggren M, Höök F. Formation of Supported Lipid Bilayers Derived from Vesicles of Various Compositional Complexity on Conducting Polymer/Silica Substrates. Langmuir 2021; 37:5494-5505. [PMID: 33929845 PMCID: PMC8280725 DOI: 10.1021/acs.langmuir.1c00175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/26/2021] [Indexed: 05/30/2023]
Abstract
Supported lipid bilayers (SLBs) serve important roles as minimalistic models of cellular membranes in multiple diagnostic and pharmaceutical applications as well as in the strive to gain fundamental insights about their complex biological function. To further expand the utility of SLBs, there is a need to go beyond simple lipid compositions to thereby better mimic the complexity of native cell membranes, while simultaneously retaining their compatibility with a versatile range of analytical platforms. To meet this demand, we have in this work explored SLB formation on PEDOT:PSS/silica nanoparticle composite films and mesoporous silica films, both capable of transporting ions to an underlying conducting PEDOT:PSS film. The SLB formation process was evaluated by using the quartz crystal microbalance with dissipation (QCM-D) monitoring, total internal reflection fluorescence (TIRF) microscopy, and fluorescence recovery after photobleaching (FRAP) for membranes made of pure synthetic lipids with or without the reconstituted membrane protein β-secretase 1 (BACE1) as well as cell-derived native lipid vesicles containing overexpressed BACE1. The mesoporous silica thin film was superior to the PEDOT:PSS/silica nanoparticle composite, providing successful formation of bilayers with high lateral mobility and low defect density even for the most complex native cell membranes.
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Affiliation(s)
- Hanna Ulmefors
- Division
of Nano and Biological Physics, Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Josefin Nissa
- Laboratory
of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
| | - Hudson Pace
- Division
of Nano and Biological Physics, Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Olov Wahlsten
- Division
of Nano and Biological Physics, Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Anders Gunnarsson
- Discovery
Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 431 83 Mölndal, Sweden
| | - Daniel T. Simon
- Laboratory
of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
| | - Magnus Berggren
- Laboratory
of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
| | - Fredrik Höök
- Division
of Nano and Biological Physics, Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
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17
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Munier CC, De Maria L, Edman K, Gunnarsson A, Longo M, MacKintosh C, Patel S, Snijder A, Wissler L, Brunsveld L, Ottmann C, Perry MWD. Glucocorticoid receptor Thr524 phosphorylation by MINK1 induces interactions with 14-3-3 protein regulators. J Biol Chem 2021; 296:100551. [PMID: 33744286 PMCID: PMC8080530 DOI: 10.1016/j.jbc.2021.100551] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 08/06/2020] [Revised: 03/08/2021] [Accepted: 03/16/2021] [Indexed: 01/10/2023] Open
Abstract
The glucocorticoid receptor (GR) is a ligand-dependent transcription factor that plays a central role in inflammation. The GR activity is also modulated via protein–protein interactions, including binding of 14-3-3 proteins induced by GR phosphorylation. However, the specific phosphorylation sites on the GR that trigger these interactions and their functional consequences are less clear. Hence, we sought to examine this system in more detail. We used phosphorylated GR peptides, biophysical studies, and X-ray crystallography to identify key residues within the ligand-binding domain of the GR, T524 and S617, whose phosphorylation results in binding of the representative 14-3-3 protein 14-3-3ζ. A kinase screen identified misshapen-like kinase 1 (MINK1) as responsible for phosphorylating T524 and Rho-associated protein kinase 1 for phosphorylating S617; cell-based approaches confirmed the importance of both GR phosphosites and MINK1 but not Rho-associated protein kinase 1 alone in inducing GR–14-3-3 binding. Together our results provide molecular-level insight into 14-3-3-mediated regulation of the GR and highlight both MINK1 and the GR–14-3-3 axis as potential targets for future therapeutic intervention.
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Affiliation(s)
- Claire C Munier
- Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden; Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Eindhoven, The Netherlands
| | - Leonardo De Maria
- Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Karl Edman
- Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Marianna Longo
- Division of Cell and Developmental Biology (C.M.), College of Life Sciences, University of Dundee, Dundee, Scotland, UK
| | - Carol MacKintosh
- Division of Cell and Developmental Biology (C.M.), College of Life Sciences, University of Dundee, Dundee, Scotland, UK
| | - Saleha Patel
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Arjan Snijder
- Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Lisa Wissler
- Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Luc Brunsveld
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Eindhoven, The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Eindhoven, The Netherlands
| | - Matthew W D Perry
- Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.
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18
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La Sala G, Gunnarsson A, Edman K, Tyrchan C, Hogner A, Frolov A. Unravelling Allosteric Cross-Talk between Co-Activator Peptide and Ligand Binding Site in Glucocorticoid Receptor. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.1903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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19
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Gunnarsson A, Stubbs CJ, Rawlins PB, Taylor-Newman E, Lee WC, Geschwindner S, Hytönen V, Holdgate G, Jha R, Dahl G. Regenerable Biosensors for Small-Molecule Kinetic Characterization Using SPR. SLAS Discov 2020; 26:730-739. [PMID: 33289457 DOI: 10.1177/2472555220975358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A key activity in small-molecule drug discovery is the characterization of compound-target interactions. Surface plasmon resonance (SPR) is a flexible technique for this purpose, with a wide affinity range (micromoles to picomoles), low protein requirements, and the ability to characterize the kinetics of compound binding. However, a key requirement of SPR is the immobilization of the target protein to the surface of the sensor chip. The most commonly used immobilization techniques (covalent immobilization, streptavidin-biotin) are irreversible in nature, which can afford excellent baseline stability but impose limitations throughput for slowly dissociating compounds or unstable targets. Reversible immobilization (e.g., His-tag-Ni-NTA) is possible but typically precludes accurate quantification of slow dissociation kinetics due to baseline drift.Here we present our investigation of three immobilization strategies (dual-His-tagged target protein, His-tagged streptavidin, and switchavidin) that combine the robustness of irreversible immobilization with the flexibility of reversible immobilization. Each has its own advantages and limitations, and while a universal immobilization procedure remains to be found, these strategies add to the immobilization toolbox that enables previously out-of-scope applications. Such applications are highlighted in two examples that greatly increased throughput for the kinetic characterization of potent kinase inhibitors and kinetic profiling of covalent inhibitors.
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Affiliation(s)
- Anders Gunnarsson
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Christopher J Stubbs
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Philip B Rawlins
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Eleanor Taylor-Newman
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK.,Deptartment of Chemistry, University of Leicester, Leicester, UK
| | - Wei-Chao Lee
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Stefan Geschwindner
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Vesa Hytönen
- Faculty of Medicine and Health Technology, University of Tampere, Tampere, Pirkanmaa, Finland
| | - Geoffrey Holdgate
- Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Alderley Park, UK
| | - Rupam Jha
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Göran Dahl
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
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20
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England RM, Moss JI, Gunnarsson A, Parker JS, Ashford MB. Synthesis and Characterization of Dendrimer-Based Polysarcosine Star Polymers: Well-Defined, Versatile Platforms Designed for Drug-Delivery Applications. Biomacromolecules 2020; 21:3332-3341. [PMID: 32672451 DOI: 10.1021/acs.biomac.0c00768] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This paper describes the synthesis of star polymers designed for future drug-delivery applications. A generation-5 lysine dendrimer was used as a macroinitiator for the ring-opening polymerization of the sarcosine N-carboxyanhydride monomer to produce 32-arm star polymers with narrow molar mass distributions and desirable hydrodynamic size control. Fluorescent dye-labeled polymers were dosed in mice to measure plasma pharmacokinetics. Long circulation times were observed, representing ideal properties for biophysical targeting of tumors. In vivo efficacy of one of these star polymers conjugated to the therapeutic molecule SN-38 was evaluated in mice bearing SW620 xenografted tumors to demonstrate high antitumor activity and low body weight loss compared to the SN-38 prodrug irinotecan and this shows the potential of these delivery systems. As a further build, we demonstrated that these star polymers can be easily chain-end-functionalized with useful chemical moieties, giving opportunities for future receptor-targeting strategies. Finally, we describe the synthetic advantages of these star polymers that make them attractive from a pharmaceutical manufacturing perspective and report characterization of the polymers with a variety of techniques.
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Affiliation(s)
- Richard M England
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 2NA, U.K.,Early Chemical Development, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 4TF, U.K
| | - Jennifer I Moss
- Early TDE, Oncology R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Anders Gunnarsson
- Discovery Sciences, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg 431 50, Sweden
| | - Jeremy S Parker
- Early Chemical Development, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 4TF, U.K
| | - Marianne B Ashford
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield SK10 2NA, U.K
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21
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Köhler C, Carlström G, Gunnarsson A, Weininger U, Tångefjord S, Ullah V, Lepistö M, Karlsson U, Papavoine T, Edman K, Akke M. Dynamic allosteric communication pathway directing differential activation of the glucocorticoid receptor. Sci Adv 2020; 6:eabb5277. [PMID: 32832645 PMCID: PMC7439413 DOI: 10.1126/sciadv.abb5277] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 06/05/2020] [Indexed: 05/07/2023]
Abstract
Allosteric communication within proteins is a hallmark of biochemical signaling, but the dynamic transmission pathways remain poorly characterized. We combined NMR spectroscopy and surface plasmon resonance to reveal these pathways and quantify their energetics in the glucocorticoid receptor, a transcriptional regulator controlling development, metabolism, and immune response. Our results delineate a dynamic communication network of residues linking the ligand-binding pocket to the activation function-2 interface, where helix 12, a switch for transcriptional activation, exhibits ligand- and coregulator-dependent dynamics coupled to graded activation. The allosteric free energy responds to variations in ligand structure: subtle changes gradually tune allostery while preserving the transmission pathway, whereas substitution of the entire pharmacophore leads to divergent allosteric control by apparently rewiring the communication network. Our results provide key insights that should aid in the design of mechanistically differentiated ligands.
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Affiliation(s)
- C. Köhler
- Respiratory, Inflammation and Autoimmunity, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - G. Carlström
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 221 00 Lund, Sweden
| | - A. Gunnarsson
- Discovery Sciences, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - U. Weininger
- Division of Biophysical Chemistry, Center for Molecular Protein Science, Department of Chemistry, Lund University, P. O. Box 124, 221 00 Lund, Sweden
| | - S. Tångefjord
- Respiratory, Inflammation and Autoimmunity, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
- Discovery Sciences, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - V. Ullah
- Respiratory, Inflammation and Autoimmunity, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - M. Lepistö
- Respiratory, Inflammation and Autoimmunity, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - U. Karlsson
- Discovery Sciences, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - T. Papavoine
- Respiratory, Inflammation and Autoimmunity, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - K. Edman
- Discovery Sciences, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - M. Akke
- Division of Biophysical Chemistry, Center for Molecular Protein Science, Department of Chemistry, Lund University, P. O. Box 124, 221 00 Lund, Sweden
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22
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Bosica F, Andrei SA, Neves JF, Brandt P, Gunnarsson A, Landrieu I, Ottmann C, O'Mahony G. Design of Drug-Like Protein-Protein Interaction Stabilizers Guided By Chelation-Controlled Bioactive Conformation Stabilization. Chemistry 2020; 26:7131-7139. [PMID: 32255539 DOI: 10.1002/chem.202001608] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 04/03/2020] [Indexed: 01/29/2023]
Abstract
Protein-protein interactions (PPIs) of 14-3-3 proteins are a model system for studying PPI stabilization. The complex natural product Fusicoccin A stabilizes many 14-3-3 PPIs but is not amenable for use in SAR studies, motivating the search for more drug-like chemical matter. However, drug-like 14-3-3 PPI stabilizers enabling such studies have remained elusive. An X-ray crystal structure of a PPI in complex with an extremely low potency stabilizer uncovered an unexpected non-protein interacting, ligand-chelated Mg2+ leading to the discovery of metal-ion-dependent 14-3-3 PPI stabilization potency. This originates from a novel chelation-controlled bioactive conformation stabilization effect. Metal chelation has been associated with pan-assay interference compounds (PAINS) and frequent hitter behavior, but chelation can evidently also lead to true potency gains and find use as a medicinal chemistry strategy to guide compound optimization. To demonstrate this, we exploited the effect to design the first potent, selective, and drug-like 14-3-3 PPI stabilizers.
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Affiliation(s)
- Francesco Bosica
- Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183, Mölndal, Sweden.,Laboratory of Chemical Biology, Department of Biomedical, Engineering and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - Sebastian A Andrei
- Laboratory of Chemical Biology, Department of Biomedical, Engineering and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - João Filipe Neves
- ERL9002 Integrative Structural Biology, CNRS, 50 Avenue de Halley, 59658, Villeneuve d'Ascq, Lille, France.,U1167 RID-AGE Risk Factors and Molecular Determinants of Aging-Related Diseases, Inserm, CHU Lille, Institut Pasteur de Lille, Univ. Lille, 1 Rue du Professeur Calmette, 59800, Lille, France
| | - Peter Brandt
- Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183, Mölndal, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183, Mölndal, Sweden
| | - Isabelle Landrieu
- ERL9002 Integrative Structural Biology, CNRS, 50 Avenue de Halley, 59658, Villeneuve d'Ascq, Lille, France.,U1167 RID-AGE Risk Factors and Molecular Determinants of Aging-Related Diseases, Inserm, CHU Lille, Institut Pasteur de Lille, Univ. Lille, 1 Rue du Professeur Calmette, 59800, Lille, France
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical, Engineering and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands.,Department of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117, Essen, Germany
| | - Gavin O'Mahony
- Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Pepparedsleden 1, 43183, Mölndal, Sweden
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23
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Kuusk A, Neves JF, Bravo-Rodriguez K, Gunnarsson A, Ruiz-Blanco YB, Ehrmann M, Chen H, Landrieu I, Sanchez-Garcia E, Boyd H, Ottmann C, Doveston RG. Adoption of a Turn Conformation Drives the Binding Affinity of p53 C-Terminal Domain Peptides to 14-3-3σ. ACS Chem Biol 2020; 15:262-271. [PMID: 31742997 DOI: 10.1021/acschembio.9b00893] [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: 01/01/2023]
Abstract
The interaction between the adapter protein 14-3-3σ and transcription factor p53 is important for preserving the tumor-suppressor functions of p53 in the cell. A phosphorylated motif within the C-terminal domain (CTD) of p53 is key for binding to the amphipathic groove of 14-3-3. This motif is unique among 14-3-3 binding partners, and the precise dynamics of the interaction is not yet fully understood. Here, we investigate this interaction at the molecular level by analyzing the binding of different length p53 CTD peptides to 14-3-3σ using ITC, SPR, NMR, and MD simulations. We observed that the propensity of the p53 peptide to adopt turn-like conformation plays an important role in the binding to the 14-3-3σ protein. Our study contributes to elucidate the molecular mechanism of the 14-3-3-p53 binding and provides useful insight into how conformation properties of a ligand influence protein binding.
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Affiliation(s)
- Ave Kuusk
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Mölndal, Sweden
- Laboratory of Chemical Biology, Department of Biomedical Engineering, and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | | | | | | | | | | | - Hongming Chen
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Mölndal, Sweden
- Chemistry and Chemical Biology Centre, Guangzhou Regenerative Medicine and Health-Guangdong Laboratory, Guangzhou, China
| | | | | | - Helen Boyd
- Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge, U.K
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering, and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Richard G. Doveston
- Leicester Institute of Structural and Chemical Biology and School of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, U.K
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24
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Saline M, Badertscher L, Wolter M, Lau R, Gunnarsson A, Jacso T, Norris T, Ottmann C, Snijder A. AMPK and AKT protein kinases hierarchically phosphorylate the N-terminus of the FOXO1 transcription factor, modulating interactions with 14-3-3 proteins. J Biol Chem 2019; 294:13106-13116. [PMID: 31308176 DOI: 10.1074/jbc.ra119.008649] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [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: 03/28/2019] [Revised: 07/10/2019] [Indexed: 11/06/2022] Open
Abstract
Forkhead box protein O1 (FOXO1) is a transcription factor involved in various cellular processes such as glucose metabolism, development, stress resistance, and tumor suppression. FOXO1's transcriptional activity is controlled by different environmental cues through a myriad of posttranslational modifications. In response to growth factors, the serine/threonine kinase AKT phosphorylates Thr24 and Ser256 in FOXO1 to stimulate binding of 14-3-3 proteins, causing FOXO1 inactivation. In contrast, low nutrient and energy levels induce FOXO1 activity. AMP-activated protein kinase (AMPK), a master regulator of cellular energy homeostasis, partly mediates this effect through phosphorylation of Ser383 and Thr649 in FOXO1. In this study, we identified Ser22 as an additional AMPK phosphorylation site in FOXO1's N terminus, with Ser22 phosphorylation preventing binding of 14-3-3 proteins. The crystal structure of a FOXO1 peptide in complex with 14-3-3 σ at 2.3 Å resolution revealed that this is a consequence of both steric hindrance and electrostatic repulsion. Furthermore, we found that AMPK-mediated Ser22 phosphorylation impairs Thr24 phosphorylation by AKT in a hierarchical manner. Thus, numerous mechanisms maintain FOXO1 activity via AMPK signaling. AMPK-mediated Ser22 phosphorylation directly and indirectly averts binding of 14-3-3 proteins, whereas phosphorylation of Ser383 and Thr649 complementarily stimulates FOXO1 activity. Our results shed light on a mechanism that integrates inputs from both AMPK and AKT signaling pathways in a small motif to fine-tune FOXO1 transcriptional activity.
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Affiliation(s)
- Maria Saline
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Lukas Badertscher
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Madita Wolter
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Roxanne Lau
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Anders Gunnarsson
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Tomas Jacso
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Tyrrell Norris
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Arjan Snijder
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden.
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25
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Pace HP, Hannestad JK, Armonious A, Adamo M, Agnarsson B, Gunnarsson A, Micciulla S, Sjövall P, Gerelli Y, Höök F. Structure and Composition of Native Membrane Derived Polymer-Supported Lipid Bilayers. Anal Chem 2018; 90:13065-13072. [PMID: 30350611 DOI: 10.1021/acs.analchem.8b04110] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Over the last two decades, supported lipid bilayers (SLBs) have been extensively used as model systems to study cell membrane structure and function. While SLBs have been traditionally produced from simple lipid mixtures, there has been a recent surge in compositional complexity to better mimic cellular membranes and thereby bridge the gap between classic biophysical approaches and cell experiments. To this end, native cellular membrane derived SLBs (nSLBs) have emerged as a new category of SLBs. As a new type of biomimetic material, an analytical workflow must be designed to characterize its molecular composition and structure. Herein, we demonstrate how a combination of fluorescence microscopy, neutron reflectometry, and secondary ion mass spectrometry offers new insights on structure, composition, and quality of nSLB systems formed using so-called hybrid vesicles, which are a mixture of native membrane material and synthetic lipids. With this approach, we demonstrate that the nSLB formed a continuous structure with complete mixing of the synthetic and native membrane components and a molecular stoichiometry that essentially mirrors that of the hybrid vesicles. Furthermore, structural investigation of the nSLB revealed that PEGylated lipids do not significantly thicken the hydration layer between the bilayer and substrate when on silicon substrates; however, nSLBs do have more topology than their simpler, purely synthetic counterparts. Beyond new insights regarding the structure and composition of nSLB systems, this work also serves to guide future researchers in producing and characterizing nSLBs from their cellular membrane of choice.
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Affiliation(s)
- Hudson P Pace
- Department of Physics , Chalmers University of Technology , SE-412 96 Göteborg , Sweden
| | - Jonas K Hannestad
- Department of Physics , Chalmers University of Technology , SE-412 96 Göteborg , Sweden.,Biosciences and Materials , Research Institutes of Sweden , SE-501 15 Borås , Sweden
| | - Antonious Armonious
- Department of Physics , Chalmers University of Technology , SE-412 96 Göteborg , Sweden
| | - Marco Adamo
- Institute Laue-Langevin , 38000 Grenoble , France.,Department of Chemical Engineering , Imperial College London , London SW7 2AZ , United Kingdom
| | - Bjorn Agnarsson
- Department of Physics , Chalmers University of Technology , SE-412 96 Göteborg , Sweden
| | - Anders Gunnarsson
- Discovery Sciences, IMED Biotech Unit , AstraZeneca , Gothenburg , Sweden
| | - Samantha Micciulla
- Institute Laue-Langevin , 38000 Grenoble , France.,Max Planck Institute of Colloids and Interfaces , 14476 Potsdam , Germany
| | - Peter Sjövall
- Department of Physics , Chalmers University of Technology , SE-412 96 Göteborg , Sweden.,Biosciences and Materials , Research Institutes of Sweden , SE-501 15 Borås , Sweden
| | - Yuri Gerelli
- Institute Laue-Langevin , 38000 Grenoble , France
| | - Fredrik Höök
- Department of Physics , Chalmers University of Technology , SE-412 96 Göteborg , Sweden
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26
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Bamberg K, Johansson U, Edman K, William-Olsson L, Myhre S, Gunnarsson A, Geschwindner S, Aagaard A, Björnson Granqvist A, Jaisser F, Huang Y, Granberg KL, Jansson-Löfmark R, Hartleib-Geschwindner J. Preclinical pharmacology of AZD9977: A novel mineralocorticoid receptor modulator separating organ protection from effects on electrolyte excretion. PLoS One 2018; 13:e0193380. [PMID: 29474466 PMCID: PMC5825103 DOI: 10.1371/journal.pone.0193380] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Accepted: 02/11/2018] [Indexed: 11/23/2022] Open
Abstract
Excess mineralocorticoid receptor (MR) activation promotes target organ dysfunction, vascular injury and fibrosis. MR antagonists like eplerenone are used for treating heart failure, but their use is limited due to the compound class-inherent hyperkalemia risk. Here we present evidence that AZD9977, a first-in-class MR modulator shows cardio-renal protection despite a mechanism-based reduced liability to cause hyperkalemia. AZD9977 in vitro potency and binding mode to MR were characterized using reporter gene, binding, cofactor recruitment assays and X-ray crystallopgraphy. Organ protection was studied in uni-nephrectomised db/db mice and uni-nephrectomised rats administered aldosterone and high salt. Acute effects of single compound doses on urinary electrolyte excretion were tested in rats on a low salt diet. AZD9977 and eplerenone showed similar human MR in vitro potencies. Unlike eplerenone, AZD9977 is a partial MR antagonist due to its unique interaction pattern with MR, which results in a distinct recruitment of co-factor peptides when compared to eplerenone. AZD9977 dose dependently reduced albuminuria and improved kidney histopathology similar to eplerenone in db/db uni-nephrectomised mice and uni-nephrectomised rats. In acute testing, AZD9977 did not affect urinary Na+/K+ ratio, while eplerenone increased the Na+/K+ ratio dose dependently. AZD9977 is a selective MR modulator, retaining organ protection without acute effect on urinary electrolyte excretion. This predicts a reduced hyperkalemia risk and AZD9977 therefore has the potential to deliver a safe, efficacious treatment to patients prone to hyperkalemia.
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MESH Headings
- Administration, Oral
- Aldosterone
- Animals
- Benzoates/chemistry
- Benzoates/pharmacokinetics
- Benzoates/pharmacology
- Cell Line, Tumor
- Dose-Response Relationship, Drug
- Drug Evaluation, Preclinical
- Eplerenone
- Humans
- Kidney/drug effects
- Kidney/metabolism
- Kidney/pathology
- Male
- Mice, Mutant Strains
- Mineralocorticoid Receptor Antagonists/chemistry
- Mineralocorticoid Receptor Antagonists/pharmacokinetics
- Mineralocorticoid Receptor Antagonists/pharmacology
- Molecular Structure
- Oxazines/chemistry
- Oxazines/pharmacokinetics
- Oxazines/pharmacology
- Potassium/urine
- Rats, Sprague-Dawley
- Receptors, Mineralocorticoid/genetics
- Receptors, Mineralocorticoid/metabolism
- Renal Insufficiency, Chronic/drug therapy
- Renal Insufficiency, Chronic/metabolism
- Renal Insufficiency, Chronic/pathology
- Sodium/urine
- Sodium, Dietary
- Spironolactone/analogs & derivatives
- Spironolactone/chemistry
- Spironolactone/pharmacokinetics
- Spironolactone/pharmacology
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Affiliation(s)
- Krister Bamberg
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Ulrika Johansson
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Karl Edman
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Lena William-Olsson
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Susanna Myhre
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Stefan Geschwindner
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Anna Aagaard
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Anna Björnson Granqvist
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Frédéric Jaisser
- Centre de Recherche des Cordeliers, INSERM U1138 Team 1, Paris, France
| | - Yufeng Huang
- Division of Nephrology & Hypertension, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Kenneth L. Granberg
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Rasmus Jansson-Löfmark
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Judith Hartleib-Geschwindner
- Cardiovascular, Renal and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Gothenburg, Sweden
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27
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Lundgren A, Fast BJ, Block S, Agnarsson B, Reimhult E, Gunnarsson A, Höök F. Affinity Purification and Single-Molecule Analysis of Integral Membrane Proteins from Crude Cell-Membrane Preparations. Nano Lett 2018; 18:381-385. [PMID: 29231738 DOI: 10.1021/acs.nanolett.7b04227] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The function of integral membrane proteins is critically dependent on their naturally surrounding lipid membrane. Detergent-solubilized and purified membrane proteins are therefore often reconstituted into cell-membrane mimics and analyzed for their function with single-molecule microscopy. Expansion of this approach toward a broad range of pharmaceutically interesting drug targets and biomarkers however remains hampered by the fact that these proteins have low expression levels, and that detergent solubilization and reconstitution often cause protein conformational changes and loss of membrane-specific cofactors, which may impair protein function. To overcome this limitation, we here demonstrate how antibody-modified nanoparticles can be used to achieve affinity purification and enrichment of selected integral membrane proteins directly from cell membrane preparations. Nanoparticles were first bound to the ectodomain of β-secretase 1 (BACE1) contained in cell-derived membrane vesicles. In a subsequent step, these were merged into a continuous supported membrane in a microfluidic channel. Through the extended nanoparticle tag, a weak (∼fN) hydrodynamic force could be applied, inducing directed in-membrane movement of targeted BACE1 exclusively. This enabled selective thousand-fold enrichment of the targeted membrane protein while preserving a natural lipid environment. In addition, nanoparticle-targeting also enabled simultaneous tracking analysis of each individual manipulated protein, revealing how their mobility changed when moved from one lipid environment to another. We therefore believe this approach will be particularly useful for separation in-line with single-molecule analysis, eventually opening up for membrane-protein sorting devices analogous to fluorescence-activated cell sorting.
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Affiliation(s)
- Anders Lundgren
- Department of Physics, Chalmers University of Technology , 41296 Göteborg, Sweden
- Department of Nanobiotechnology, University of Natural Resources and Life Sciences , 1190 Vienna, Austria
| | - Björn Johansson Fast
- Department of Physics, Chalmers University of Technology , 41296 Göteborg, Sweden
| | - Stephan Block
- Department of Physics, Chalmers University of Technology , 41296 Göteborg, Sweden
| | - Björn Agnarsson
- Department of Physics, Chalmers University of Technology , 41296 Göteborg, Sweden
| | - Erik Reimhult
- Department of Nanobiotechnology, University of Natural Resources and Life Sciences , 1190 Vienna, Austria
| | - Anders Gunnarsson
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , 43183 Mölndal, Sweden
| | - Fredrik Höök
- Department of Physics, Chalmers University of Technology , 41296 Göteborg, Sweden
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28
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Agez M, Schultz P, Medina I, Baker DJ, Burnham MP, Cardarelli RA, Conway LC, Garnier K, Geschwindner S, Gunnarsson A, McCall EJ, Frechard A, Audebert S, Deeb TZ, Moss SJ, Brandon NJ, Wang Q, Dekker N, Jawhari A. Molecular architecture of potassium chloride co-transporter KCC2. Sci Rep 2017; 7:16452. [PMID: 29184062 PMCID: PMC5705597 DOI: 10.1038/s41598-017-15739-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 10/27/2017] [Indexed: 01/15/2023] Open
Abstract
KCC2 is a neuron specific K+-Cl− co-transporter that controls neuronal chloride homeostasis, and is critically involved in many neurological diseases including brain trauma, epilepsies, autism and schizophrenia. Despite significant accumulating data on the biology and electrophysiological properties of KCC2, structure-function relationships remain poorly understood. Here we used calixarene detergent to solubilize and purify wild-type non-aggregated and homogenous KCC2. Specific binding of inhibitor compound VU0463271 was demonstrated using surface plasmon resonance (SPR). Mass spectrometry revealed glycosylations and phosphorylations as expected from functional KCC2. We show by electron microscopy (EM) that KCC2 exists as monomers and dimers in solution. Monomers are organized into “head” and “core” domains connected by a flexible “linker”. Dimers are asymmetrical and display a bent “S-shape” architecture made of four distinct domains and a flexible dimerization interface. Chemical crosslinking in reducing conditions shows that disulfide bridges are involved in KCC2 dimerization. Moreover, we show that adding a tag to the C-terminus is detrimental to KCC2 function. We postulate that the conserved KCC2 C-ter may be at the interface of dimerization. Taken together, our findings highlight the flexible multi-domain structure of KCC2 with variable anchoring points at the dimerization interface and an important C-ter extremity providing the first in-depth functional architecture of KCC2.
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Affiliation(s)
- Morgane Agez
- CALIXAR, 60 avenue Rockefeller, 69008, Lyon, France
| | - Patrick Schultz
- Department of Integrated Structural Biology, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire) INSERM, U964; CNRS/Strasbourg University, UMR7104 1, rue Laurent Fries, BP10142, 67404, Illkirch, France
| | | | - David J Baker
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Cambridge, UK
| | - Matthew P Burnham
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Alderley Park, UK
| | - Ross A Cardarelli
- AstraZeneca Tufts Laboratory for Basic and Translational Neuroscience, Boston, Massachusetts, 02111, USA
| | - Leslie C Conway
- AstraZeneca Tufts Laboratory for Basic and Translational Neuroscience, Boston, Massachusetts, 02111, USA
| | | | | | - Anders Gunnarsson
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Eileen J McCall
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Cambridge, UK
| | - Alexandre Frechard
- Department of Integrated Structural Biology, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire) INSERM, U964; CNRS/Strasbourg University, UMR7104 1, rue Laurent Fries, BP10142, 67404, Illkirch, France
| | - Stéphane Audebert
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, Marseille, France
| | - Tarek Z Deeb
- AstraZeneca Tufts Laboratory for Basic and Translational Neuroscience, Boston, Massachusetts, 02111, USA
| | - Stephen J Moss
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, 02111, USA.,Department of Neuroscience, Physiology and Pharmacology, University College, London, WC1E, 6BT, UK
| | - Nicholas J Brandon
- AstraZeneca Tufts Laboratory for Basic and Translational Neuroscience, Boston, Massachusetts, 02111, USA.,Neuroscience, IMED Biotech Unit, AstraZeneca, Boston, MA, USA
| | - Qi Wang
- AstraZeneca Tufts Laboratory for Basic and Translational Neuroscience, Boston, Massachusetts, 02111, USA.,Neuroscience, IMED Biotech Unit, AstraZeneca, Boston, MA, USA
| | - Niek Dekker
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden.
| | - Anass Jawhari
- CALIXAR, 60 avenue Rockefeller, 69008, Lyon, France.
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29
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Abstract
Optical biosensors entered target-based small-molecule drug discovery more than two decades ago and have since transformed into a value-adding component in the decision-making process. Here, we briefly highlight the major application areas of optical biosensors and focus on desirable profiles of such platforms in order to ensure their effective use in small molecule drug discovery. Furthermore, we will emphasize current technology-based constraints and discuss experimental strategies to address these limitations as well as provide a view of necessary technology improvements for next generation platforms.
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Affiliation(s)
- Tim Kaminski
- Discovery Sciences, Innovative
Medicines and Early Development Biotech Unit, AstraZeneca, Pepparedsleden 1, S-43183 Mölndal, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, Innovative
Medicines and Early Development Biotech Unit, AstraZeneca, Pepparedsleden 1, S-43183 Mölndal, Sweden
| | - Stefan Geschwindner
- Discovery Sciences, Innovative
Medicines and Early Development Biotech Unit, AstraZeneca, Pepparedsleden 1, S-43183 Mölndal, Sweden
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30
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Nordqvist A, O'Mahony G, Fridén-Saxin M, Fredenwall M, Hogner A, Granberg KL, Aagaard A, Bäckström S, Gunnarsson A, Kaminski T, Xue Y, Dellsén A, Hansson E, Hansson P, Ivarsson I, Karlsson U, Bamberg K, Hermansson M, Georgsson J, Lindmark B, Edman K. Structure-Based Drug Design of Mineralocorticoid Receptor Antagonists to Explore Oxosteroid Receptor Selectivity. ChemMedChem 2016; 12:50-65. [DOI: 10.1002/cmdc.201600529] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 11/22/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Anneli Nordqvist
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Gavin O'Mahony
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Maria Fridén-Saxin
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Marlene Fredenwall
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Anders Hogner
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Kenneth L. Granberg
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Anna Aagaard
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Stefan Bäckström
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Anders Gunnarsson
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Tim Kaminski
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Yafeng Xue
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Anita Dellsén
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Eva Hansson
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Pia Hansson
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Ida Ivarsson
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Ulla Karlsson
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
| | - Krister Bamberg
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Majlis Hermansson
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Jennie Georgsson
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Bo Lindmark
- Cardiovascular and Metabolic Diseases; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 Mölndal 43183 Sweden
| | - Karl Edman
- Discovery Sciences; Innovative Medicines and Early Development Biotech Unit; AstraZeneca; Pepparedsleden 1 43183 Mölndal Sweden
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31
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Gunnarsson A, Simonsson Nyström L, Burazerovic S, Gunnarsson J, Snijder A, Geschwindner S, Höök F. Affinity Capturing and Surface Enrichment of a Membrane Protein Embedded in a Continuous Supported Lipid Bilayer. ChemistryOpen 2016; 5:445-449. [PMID: 27777836 PMCID: PMC5062009 DOI: 10.1002/open.201600070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Indexed: 11/26/2022] Open
Abstract
Investigations of ligand‐binding kinetics to membrane proteins are hampered by their poor stability and low expression levels, which often translates into sensitivity‐related limitations impaired by low signal‐to‐noise ratios. Inspired by affinity capturing of water‐soluble proteins, which utilizes water as the mobile phase, we demonstrate affinity capturing and local enrichment of membrane proteins by using a fluid lipid bilayer as the mobile phase. Specific membrane‐protein capturing and enrichment in a microfluidic channel was accomplished by immobilizing a synthesized trivalent nitrilotriacetic acid (tris‐NTA)–biotin conjugate. A polymer‐supported lipid bilayer containing His6‐tagged β‐secretase (BACE) was subsequently laterally moved over the capture region by using a hydrodynamic flow. Specific enrichment of His6–BACE in the Ni2+–NTA‐modified region of the substrate resulted in a stationary three‐fold increase in surface coverage, and an accompanied increase in ligand‐binding response.
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Affiliation(s)
| | | | - Sabina Burazerovic
- Department of Applied Physics Chalmers University of Technology 412 96 Göteborg Sweden
| | | | - Arjan Snijder
- Discovery Sciences AstraZeneca R&D Mölndal 43183 Mölndal Sweden
| | | | - Fredrik Höök
- Department of Applied Physics Chalmers University of Technology 412 96 Göteborg Sweden
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32
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Abstract
High quality and complete supported lipid bilayers are formed on silicon oxide by employing an AH peptide mediated repair step.
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Affiliation(s)
- Min Chul Kim
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Anders Gunnarsson
- Department of Applied Physics
- Chalmers University of Technology
- Gothenburg
- Sweden
| | - Seyed R. Tabaei
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Fredrik Höök
- Department of Applied Physics
- Chalmers University of Technology
- Gothenburg
- Sweden
| | - Nam-Joon Cho
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
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33
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Agnarsson B, Lundgren A, Gunnarsson A, Rabe M, Kunze A, Mapar M, Simonsson L, Bally M, Zhdanov VP, Höök F. Evanescent Light-Scattering Microscopy for Label-Free Interfacial Imaging: From Single Sub-100 nm Vesicles to Live Cells. ACS Nano 2015; 9:11849-11862. [PMID: 26517791 DOI: 10.1021/acsnano.5b04168] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Advancement in the understanding of biomolecular interactions has benefited greatly from the development of surface-sensitive bioanalytical sensors. To further increase their broad impact, significant efforts are presently being made to enable label-free and specific biomolecule detection with high sensitivity, allowing for quantitative interpretation and general applicability at low cost. In this work, we have addressed this challenge by developing a waveguide chip consisting of a flat silica core embedded in a symmetric organic cladding with a refractive index matching that of water. This is shown to reduce stray light (background) scattering and thereby allow for label-free detection of faint objects, such as individual sub-20 nm gold nanoparticles as well as sub-100 nm lipid vesicles. Measurements and theoretical analysis revealed that light-scattering signals originating from single surface-bound lipid vesicles enable characterization of their sizes without employing fluorescent lipids as labels. The concept is also demonstrated for label-free measurements of protein binding to and enzymatic (phospholipase A2) digestion of individual lipid vesicles, enabling an analysis of the influence on the measured kinetics of the dye-labeling of lipids required in previous assays. Further, diffraction-limited imaging of cells (platelets) binding to a silica surface showed that distinct subcellular features could be visualized and temporally resolved during attachment, activation, and spreading. Taken together, these results underscore the versatility and general applicability of the method, which due to its simplicity and compatibility with conventional microscopy setups may reach a widespread in life science and beyond.
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Affiliation(s)
- Björn Agnarsson
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Anders Lundgren
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Anders Gunnarsson
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Michael Rabe
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Angelika Kunze
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
- Institute of Physical Chemistry, University of Göttingen , D-37077 Göttingen, Germany
| | - Mokhtar Mapar
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Lisa Simonsson
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Marta Bally
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Vladimir P Zhdanov
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
- Boreskov Institute of Catalysis, Russian Academy of Sciences , Novosibirsk 630090, Russia
| | - Fredrik Höök
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
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34
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Edman K, Hosseini A, Bjursell MK, Aagaard A, Wissler L, Gunnarsson A, Kaminski T, Köhler C, Bäckström S, Jensen TJ, Cavallin A, Karlsson U, Nilsson E, Lecina D, Takahashi R, Grebner C, Geschwindner S, Lepistö M, Hogner AC, Guallar V. Ligand Binding Mechanism in Steroid Receptors: From Conserved Plasticity to Differential Evolutionary Constraints. Structure 2015; 23:2280-2290. [DOI: 10.1016/j.str.2015.09.012] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/03/2015] [Accepted: 09/04/2015] [Indexed: 12/17/2022]
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35
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Wahlsten O, Gunnarsson A, Simonsson Nyström L, Pace H, Geschwindner S, Höök F. Equilibrium-fluctuation analysis for interaction studies between natural ligands and single G protein-coupled receptors in native lipid vesicles. Langmuir 2015; 31:10774-10780. [PMID: 26347379 DOI: 10.1021/acs.langmuir.5b02463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
G protein-coupled receptors (GPCRs) constitute the most versatile family of cell-membrane receptors and have been increasingly identified as important mediators of many physiological functions. They also belong to one of the most central drug target classes, but current screening technologies are limited by the requirements of overexpression and stabilization of GPCRs. This calls for sensitivity-increased detection strategies preferably meeting single-molecule detection limits. This challenge is here addressed by employing total internal reflection fluorescence microscopy to characterize the interaction kinetics between CXCR3, a GPCR involved in inflammatory responses, and two of its chemokine ligands, CXCL10 and CXCL11. Fluorescence labeling of the lipid membrane, rather than the membrane protein itself, of GPCR-containing native vesicles, and immobilization of the corresponding ligand on the surface, enabled determination of the interaction kinetics using single-molecule equilibrium-fluctuation analysis. With a limit of detection of GPCR-containing vesicles in the low picomolar concentration regime, the results demonstrate the possibility to use inhibition in solution screening of high affinity ligands/drug candidates, which due to target-binding depletion of the inhibiting compounds is demanding using assays with more moderate detection limits.
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Affiliation(s)
- Olov Wahlsten
- Department of Applied Physics, Chalmers University of Technology , SE 41296 Gothenburg, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, AstraZeneca R&D Mölndal , S-43183 Mölndal, Sweden
| | - Lisa Simonsson Nyström
- Department of Applied Physics, Chalmers University of Technology , SE 41296 Gothenburg, Sweden
| | - Hudson Pace
- Department of Applied Physics, Chalmers University of Technology , SE 41296 Gothenburg, Sweden
| | | | - Fredrik Höök
- Department of Applied Physics, Chalmers University of Technology , SE 41296 Gothenburg, Sweden
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36
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Pace H, Simonsson Nyström L, Gunnarsson A, Eck E, Monson C, Geschwindner S, Snijder A, Höök F. Preserved transmembrane protein mobility in polymer-supported lipid bilayers derived from cell membranes. Anal Chem 2015; 87:9194-203. [PMID: 26268463 DOI: 10.1021/acs.analchem.5b01449] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Supported lipid bilayers (SLBs) have contributed invaluable information about the physiochemical properties of cell membranes, but their compositional simplicity often limits the level of knowledge that can be gained about the structure and function of transmembrane proteins in their native environment. Herein, we demonstrate a generic protocol for producing polymer-supported lipid bilayers on glass surfaces that contain essentially all naturally occurring cell-membrane components of a cell line while still retaining transmembrane protein mobility and activity. This was achieved by merging vesicles made from synthetic lipids (PEGylated lipids and POPC lipids) with native cell-membrane vesicles to generate hybrid vesicles which readily rupture into a continuous polymer-supported lipid bilayer. To investigate the properties of these complex hybrid SLBs and particularly the behavior of their integral membrane-proteins, we used total internal reflection fluorescence imaging to study a transmembrane protease, β-secretase 1 (BACE1), whose ectoplasmic and cytoplasmic domains could both be specifically targeted with fluorescent reporters. By selectively probing the two different orientations of BACE1 in the resulting hybrid SLBs, the role of the PEG-cushion on transmembrane protein lateral mobility was investigated. The results reveal the necessity of having the PEGylated lipids present during vesicle adsorption to prevent immobilization of transmembrane proteins with protruding domains. The proteolytic activity of BACE1 was unadulterated by the sonication process used to merge the synthetic and native membrane vesicles; importantly it was also conserved in the SLB. The presented strategy could thus serve both fundamental studies of membrane biophysics and the production of surface-based bioanalytical sensor platforms.
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Affiliation(s)
- Hudson Pace
- Department of Applied Physics, Chalmers University of Technology , SE-41296 Gothenburg, Sweden
| | - Lisa Simonsson Nyström
- Department of Applied Physics, Chalmers University of Technology , SE-41296 Gothenburg, Sweden
| | - Anders Gunnarsson
- Discovery Sciences, AstraZeneca R&D Mölndal , SE-43183 Mölndal, Sweden
| | - Elizabeth Eck
- Department of Applied Physics, Chalmers University of Technology , SE-41296 Gothenburg, Sweden
| | - Christopher Monson
- Department of Physical Science, Southern Utah University , Cedar City, Utah 84720 United States
| | | | - Arjan Snijder
- Discovery Sciences, AstraZeneca R&D Mölndal , SE-43183 Mölndal, Sweden
| | - Fredrik Höök
- Department of Applied Physics, Chalmers University of Technology , SE-41296 Gothenburg, Sweden
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Hall VJ, Lindblad MM, Jakobsen JE, Gunnarsson A, Schmidt M, Rasmussen MA, Volke D, Zuchner T, Hyttel P. Impaired APP activity and altered Tau splicing in embryonic stem cell-derived astrocytes obtained from an APPsw transgenic minipig. Dis Model Mech 2015; 8:1265-78. [PMID: 26398935 PMCID: PMC4610230 DOI: 10.1242/dmm.019489] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 12/12/2014] [Accepted: 07/27/2015] [Indexed: 01/09/2023] Open
Abstract
Animal models of familial juvenile onset of Alzheimer's disease (AD) often fail to produce diverse pathological features of the disease by modification of single gene mutations that are responsible for the disease. They can hence be poor models for testing and development of novel drugs. Here, we analyze in vitro-produced stem cells and their derivatives from a large mammalian model of the disease created by overexpression of a single mutant human gene (APPsw). We produced hemizygous and homozygous radial glial-like cells following culture and differentiation of embryonic stem cells (ESCs) isolated from embryos obtained from mated hemizygous minipigs. These cells were confirmed to co-express varying neural markers, including NES, GFAP and BLBP, typical of type one radial glial cells (RGs) from the subgranular zone. These cells had altered expression of CCND1 and NOTCH1 and decreased expression of several ribosomal RNA genes. We found that these cells were able to differentiate into astrocytes upon directed differentiation. The astrocytes produced had decreased α- and β-secretase activity, increased γ-secretase activity and altered splicing of tau. This indicates novel aspects of early onset mechanisms related to cell renewal and function in familial AD astrocytes. These outcomes also highlight that radial glia could be a potentially useful population of cells for drug discovery, and that altered APP expression and altered tau phosphorylation can be detected in an in vitro model of the disease. Finally, it might be possible to use large mammal models to model familial AD by insertion of only a single mutation. Summary: Insight into astrocyte and radial glia pathology in an in vitro culture system derived from the APPsw pig.
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Affiliation(s)
- Vanessa J Hall
- Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg, Denmark
| | - Maiken M Lindblad
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg, Denmark
| | - Jannik E Jakobsen
- Department of Biomedicine, Aarhus University, Faculty of Health, DK-8000 Aarhus, Denmark
| | - Anders Gunnarsson
- Department of Biomedicine, Aarhus University, Faculty of Health, DK-8000 Aarhus, Denmark
| | - Mette Schmidt
- Department of Large Animal Sciences, Faculty of Life Sciences, University of Copenhagen, DK-1870 Frederiksberg, Denmark
| | | | - Daniela Volke
- Center for Biotechnology and Biomedicine, Institute of Bioanalytical Chemistry, University of Leipzig, 04103 Leipzig, Germany
| | - Thole Zuchner
- Octapharma Biopharmaceuticals GmbH, 69120 Heidelberg, Germany
| | - Poul Hyttel
- Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg, Denmark
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38
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Gunnarsson A, Snijder A, Hicks J, Gunnarsson J, Höök F, Geschwindner S. Drug Discovery at the Single Molecule Level: Inhibition-in-Solution Assay of Membrane-Reconstituted β-Secretase Using Single-Molecule Imaging. Anal Chem 2015; 87:4100-3. [DOI: 10.1021/acs.analchem.5b00740] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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)
- Anders Gunnarsson
- Discovery Sciences, AstraZeneca R&D Mölndal, SE-43183 Mölndal, Sweden
| | - Arjan Snijder
- Discovery Sciences, AstraZeneca R&D Mölndal, SE-43183 Mölndal, Sweden
| | - Jennifer Hicks
- Discovery Sciences, AstraZeneca R&D Mölndal, SE-43183 Mölndal, Sweden
| | - Jenny Gunnarsson
- Discovery Sciences, AstraZeneca R&D Mölndal, SE-43183 Mölndal, Sweden
| | - Fredrik Höök
- Department
of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
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39
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Carlred L, Gunnarsson A, Solé-Domènech S, Johansson B, Vukojević V, Terenius L, Codita A, Winblad B, Schalling M, Höök F, Sjövall P. Simultaneous Imaging of Amyloid-β and Lipids in Brain Tissue Using Antibody-Coupled Liposomes and Time-of-Flight Secondary Ion Mass Spectrometry. J Am Chem Soc 2014; 136:9973-81. [DOI: 10.1021/ja5019145] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Louise Carlred
- Chemistry,
Materials and Surfaces, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
- Department
of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Anders Gunnarsson
- Department
of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Santiago Solé-Domènech
- Department
of Molecular Medicine and Surgery, Karolinska Institutet, SE-171 76 Stockholm, Sweden
| | - Björn Johansson
- Department
of Molecular Medicine and Surgery, Karolinska Institutet, SE-171 76 Stockholm, Sweden
| | - Vladana Vukojević
- Department
of Clinical Neuroscience, Karolinska Institutet, SE-171 76 Stockholm, Sweden
| | - Lars Terenius
- Department
of Clinical Neuroscience, Karolinska Institutet, SE-171 76 Stockholm, Sweden
| | - Alina Codita
- Department
of Neurobiology, Care Sciences and Society, KI Alzheimer Disease Research
Center, Karolinska Institutet, SE-141 86 Stockholm, Sweden
| | - Bengt Winblad
- Department
of Neurobiology, Care Sciences and Society, KI Alzheimer Disease Research
Center, Karolinska Institutet, SE-141 86 Stockholm, Sweden
| | - Martin Schalling
- Department
of Molecular Medicine and Surgery, Karolinska Institutet, SE-171 76 Stockholm, Sweden
| | - Fredrik Höök
- Department
of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Peter Sjövall
- Chemistry,
Materials and Surfaces, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
- Department
of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
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Sjövall P, Agnarsson B, Carlred L, Gunnarsson A, Höök F. Liposome binding for multiplexed biomolecule detection and imaging using ToF-SIMS. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5494] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- P. Sjövall
- Chemistry, Materials and Surfaces; SP Technical Research Institute of Sweden; P.O. Box 857 SE-50115 Borås Sweden
- Department of Applied Physics; Chalmers University of Technology; SE-41296 Gothenburg Sweden
| | - B. Agnarsson
- Department of Applied Physics; Chalmers University of Technology; SE-41296 Gothenburg Sweden
| | - L. Carlred
- Chemistry, Materials and Surfaces; SP Technical Research Institute of Sweden; P.O. Box 857 SE-50115 Borås Sweden
- Department of Applied Physics; Chalmers University of Technology; SE-41296 Gothenburg Sweden
| | - A. Gunnarsson
- Department of Applied Physics; Chalmers University of Technology; SE-41296 Gothenburg Sweden
| | - F. Höök
- Department of Applied Physics; Chalmers University of Technology; SE-41296 Gothenburg Sweden
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41
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Gunnarsson A, Bally M, Jönsson P, Médard N, Höök F. Time-resolved surface-enhanced ellipsometric contrast imaging for label-free analysis of biomolecular recognition reactions on glycolipid domains. Anal Chem 2012; 84:6538-45. [PMID: 22803821 DOI: 10.1021/ac300832k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We have applied surface-enhanced ellipsometry contrast (SEEC) imaging for time-resolved label-free visualization of biomolecular recognition events on spatially heterogeneous supported lipid bilayers (SLB). Using a conventional inverted microscope equipped with total internal reflection (TIR) illumination, biomolecular binding events were monitored with a lateral resolution near the optical diffraction limit at an acquisition rate of ~1 Hz with a sensitivity in terms of surface coverage of ~1 ng/cm(2). Despite the significant improvement in spatial resolution compared to alternative label-free surface-based imaging technologies, the sensitivity remains competitive with surface plasmon resonance (SPR) imaging and imaging ellipsometry. The potential of the technique to discriminate local differences in protein binding kinetics was demonstrated by time-resolved imaging of anti-GalCer antibodies binding to phase-separated lipid bilayers consisting of phosphatidylcholine (POPC) and galactosylceramide (GalCer). A higher antibody binding capacity was observed on the GalCer-diluted fluid region in comparison to the GalCer-rich gel phase domains. This observation is tentatively attributed to differences in the presentation of the GalCer epitope in the two phases, resulting in differences in availability of the ligand for antibody binding. The complementary information obtained by swiftly switching between SEEC and fluorescence (including TIR fluorescence) imaging modes was used to support the data interpretation. The simplicity and generic applicability of the concept is discussed in terms of microfluidic applications.
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Affiliation(s)
- Anders Gunnarsson
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
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42
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Bally M, Gunnarsson A, Svensson L, Larson G, Zhdanov VP, Höök F. Interaction of single viruslike particles with vesicles containing glycosphingolipids. Phys Rev Lett 2011; 107:188103. [PMID: 22107678 DOI: 10.1103/physrevlett.107.188103] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Indexed: 05/31/2023]
Abstract
Glycosphingolipids are involved in the first steps of virus-cell interaction, where they mediate specific recognition of the host cell membrane. We have employed total-internal-reflection fluorescence microscopy to explore the interaction kinetics between individual unlabeled noroviruslike particles, which are attached to a glycosphingolipid-containing lipid bilayer, and fluorescent vesicles containing different types and concentrations of glycosphingolipids. Under association equilibrium, the vesicle-binding rate is found to be kinetically limited, yielding information on the corresponding activation energy. The dissociation kinetics are logarithmic over a wide range of time. The latter is explained by the vesicle-size-related distribution of the dissociation activation energy. The biological, pharmaceutical, and diagnostic relevance of the study is briefly discussed.
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Affiliation(s)
- M Bally
- Department of Applied Physics, Chalmers University of Technology, S-412 96 Göteborg, Sweden
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Gunnarsson A, Dexlin L, Wallin P, Svedhem S, Jönsson P, Wingren C, Höök F. Kinetics of Ligand Binding to Membrane Receptors from Equilibrium Fluctuation Analysis of Single Binding Events. J Am Chem Soc 2011; 133:14852-5. [DOI: 10.1021/ja2047039] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anders Gunnarsson
- Department of Applied Physics, Chalmers University of Technology, SE-41133 Göteborg, Sweden
| | - Linda Dexlin
- Department of Immunotechnology and CREATE Health, Lund University, SE-221 84 Lund, Sweden
| | - Patric Wallin
- Department of Applied Physics, Chalmers University of Technology, SE-41133 Göteborg, Sweden
| | - Sofia Svedhem
- Department of Applied Physics, Chalmers University of Technology, SE-41133 Göteborg, Sweden
| | - Peter Jönsson
- Department of Applied Physics, Chalmers University of Technology, SE-41133 Göteborg, Sweden
| | - Christer Wingren
- Department of Immunotechnology and CREATE Health, Lund University, SE-221 84 Lund, Sweden
| | - Fredrik Höök
- Department of Applied Physics, Chalmers University of Technology, SE-41133 Göteborg, Sweden
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Simonsson L, Gunnarsson A, Wallin P, Jönsson P, Höök F. Continuous Lipid Bilayers Derived from Cell Membranes for Spatial Molecular Manipulation. J Am Chem Soc 2011; 133:14027-32. [DOI: 10.1021/ja204589a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lisa Simonsson
- Department of Applied Physics, Chalmers University of Technology, SE 41296 Gothenburg, Sweden
| | - Anders Gunnarsson
- Department of Applied Physics, Chalmers University of Technology, SE 41296 Gothenburg, Sweden
| | - Patric Wallin
- Department of Applied Physics, Chalmers University of Technology, SE 41296 Gothenburg, Sweden
| | - Peter Jönsson
- Department of Applied Physics, Chalmers University of Technology, SE 41296 Gothenburg, Sweden
| | - Fredrik Höök
- Department of Applied Physics, Chalmers University of Technology, SE 41296 Gothenburg, Sweden
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45
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Hall VJ, Jakobsen J, Gunnarsson A, Schmidt M, Lund Jørgensen A, Hyttel P. 296 PRODUCTION OF HEMIZYGOUS AND HOMOZYGOUS EMBRYONIC STEM CELL-DERIVED NEURAL PROGENITOR CELLS FROM THE TRANSGENIC ALZHEIMER GÖTTINGEN MINIPIG. Reprod Fertil Dev 2011. [DOI: 10.1071/rdv23n1ab296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Alzheimer’s disease is the most prevalent cause of dementia and afflicts ∼26 million people worldwide. There are currently no cures for this disease. Production of in vitro models of the disease would be extremely useful for studying disease mechanisms and for potential screening of novel drugs. In this study we produced 2 hemizygote and 2 homozygote embryonic stem cell-derived neural progenitor cell lines from Day 8 transgenic blastocysts carrying a human gene linked to early-onset Alzheimer’s disease [Swedish mutation of the amyloid precursor protein (hAPPsw)]. Following onset of spontaneous oestrus, a mating of hAPPsw± × hAPPsw± Göttingen transgenic progeny was performed. Eight days after the first of 2 matings, embryos were flushed from the tip of both cornuas of the gilt under surgical anaesthesia. A total of 6 blastocysts were obtained and 7 corpora lutei recorded. Blastocysts were transported for 4 h in porcine zygote medium 3 (PZM-3) in hypoxic, humidified conditions at 39°C to the cell laboratory. Compact epiblasts were mechanically isolated from the embryo using insulin needles and cultured on inactivated mouse embryonic fibroblasts in embryonic stem cell medium, supplemented with 20 ng mL–1 human recombinant basic fibroblast growth factor (Prospec) and 20 ng mL–1 human recombinant Activin A (Prospec), for a period of 5 days in hypoxic conditions at 39°C. Five of the 6 epiblasts expanded to form embryonic stem-cell-like outgrowth colonies. These were cut into small colonies and plated on MS5 murine stromal cells to induce spontaneous neural differentiation in DMEM medium containing 15% knockout serum replacement. Neuronal rosette-like structures were identified from Day 10 of differentiation onward. Six rosette structures were mechanically isolated from 4 outgrowths and plated in serum-free conditions on Matrigel-coated dishes. Two of the 6 lines failed to proliferate beyond passage 2. The 4 remaining cell lines have currently been cultured to passage 7. These lines were analysed at passage 5 by comparative real-time PCR and found to be positive for the neural progenitor markers VIMENTIN, SOX2, NESTIN PAX6, MUSASHI; other neural markers BETAIIITUBULIN and NCAM; and the astrocyte marker, GFAP. These lines were also subjected to analysis by immunocytochemistry and found to express SOX2, VIMENTIN, and NESTIN. Further genotyping by comparative real-time PCR using primers designed to target the hAPPsw gene revealed that 2 lines carried a single copy of hAPPsw and 2 lines carried 2 copies of hAPPsw. The expression levels of the hAPPsw transgene in these cell lines were determined using quantitative PCR. These cell lines are currently being investigated for their ability to differentiate into cholinergic neurons and for their expression of hyperphosphorylated TAU and β-Amyloid secretion. These cell lines will be potentially relevant for the in vitro study of amyloid precursor protein accumulation in neural cells and its role in cell death, as well as for potential screening of novel drugs for Alzheimer’s disease.
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Abstract
The separation of molecules residing in the cell membrane remains a largely unsolved problem in the fields of bioscience and biotechnology. We demonstrate how hydrodynamic forces can be used to both accumulate and separate membrane-bound proteins in their native state. A supported lipid bilayer (SLB) was formed inside a microfluidic channel with the two proteins streptavidin (SA) and cholera toxin (CT) coupled to receptors in the lipid bilayer. The anchored proteins were first driven toward the edge of the lipid bilayer by hydrodynamic forces from a flowing liquid above the SLB, resulting in the accumulation of protein molecules at the edge of the bilayer. After the concentration process, the bulk flow of liquid in the channel was reversed and the accumulated proteins were driven away from the edge of the bilayer. Each type of protein was found to move at a characteristic drift velocity, determined by the frictional coupling between the protein and the lipid bilayer, as well as the size and shape of the protein molecule. Despite having a similar molecular weight, SA and CT could be separated into monomolecular populations using this approach. The method also revealed heterogeneity among the CT molecules, resulting in three subpopulations with different drift velocities. This was tentatively attributed to multivalent interactions between the protein and the monosialoganglioside G(M1) receptors in the lipid bilayer.
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Affiliation(s)
- Peter Jönsson
- Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
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Gunnarsson A, Kollmer F, Sohn S, Höök F, Sjövall P. Spatial-Resolution Limits in Mass Spectrometry Imaging of Supported Lipid Bilayers and Individual Lipid Vesicles. Anal Chem 2010; 82:2426-33. [DOI: 10.1021/ac902744u] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Anders Gunnarsson
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden, ION-TOF GmbH, Heisenbergstrasse 15, D-48149, Münster, Germany, Physikalisches Institut der Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany, and Department of Chemistry and Materials Technology, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
| | - Felix Kollmer
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden, ION-TOF GmbH, Heisenbergstrasse 15, D-48149, Münster, Germany, Physikalisches Institut der Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany, and Department of Chemistry and Materials Technology, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
| | - Sascha Sohn
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden, ION-TOF GmbH, Heisenbergstrasse 15, D-48149, Münster, Germany, Physikalisches Institut der Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany, and Department of Chemistry and Materials Technology, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
| | - Fredrik Höök
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden, ION-TOF GmbH, Heisenbergstrasse 15, D-48149, Münster, Germany, Physikalisches Institut der Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany, and Department of Chemistry and Materials Technology, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
| | - Peter Sjövall
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden, ION-TOF GmbH, Heisenbergstrasse 15, D-48149, Münster, Germany, Physikalisches Institut der Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany, and Department of Chemistry and Materials Technology, SP Technical Research Institute of Sweden, P.O. Box 857, SE-501 15 Borås, Sweden
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48
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Gunnarsson A, Sjövall P, Höök F. Liposome-based chemical barcodes for single molecule DNA detection using imaging mass spectrometry. Nano Lett 2010; 10:732-737. [PMID: 20085369 DOI: 10.1021/nl904208y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report on a mass-spectrometry (time-of-flight secondary ion mass spectrometry, TOF-SIMS) based method for multiplexed DNA detection utilizing a random array, where the lipid composition of small unilamellar liposomes act as chemical barcodes to identify unique DNA target sequences down to the single molecule level. In a sandwich format, suspended target-DNA to be detected mediates the binding of capture-DNA modified liposomes to surface-immobilized probe-DNA. With the lipid composition of each liposome encoding a unique target-DNA sequence, TOF-SIMS analysis was used to determine the chemical fingerprint of the bound liposomes. Using high-resolution TOF-SIMS imaging, providing sub-200 nm spatial resolution, single DNA targets could be detected and identified via the chemical fingerprint of individual liposomes. The results also demonstrate the capability of TOF-SIMS to provide multiplexed detection of DNA targets on substrate areas in the micrometer range. Together with a high multiplexing capacity, this makes the concept an interesting alternative to existing barcode concepts based on fluorescence, Raman, or graphical codes for small-scale bioanalysis.
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Affiliation(s)
- Anders Gunnarsson
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, Göteborg, Sweden
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49
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Gustafsson A, Båverud V, Gunnarsson A, Pringle J, Franklin A. Study of faecal shedding of Clostridium difficile in horses treated with penicillin. Equine Vet J 2010; 36:180-2. [PMID: 15038443 DOI: 10.2746/0425164044868657] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- A Gustafsson
- Department of Large Animal Clinical Sciences, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Box 7018, S-750 07 Uppsala, Sweden
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50
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Gunnarsson A, Sjövall P, Jönsson P, Höök F. On-Chip Single Molecule Detection of Unlabeled DNA Targets. Biophys J 2010. [DOI: 10.1016/j.bpj.2009.12.981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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