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Zaree P, Torano JS, de Haan CAM, Scheltma RA, Barendregt A, Thijssen V, Yu G, Flesch F, Pieters RJ. The assessment of Pseudomonas aeruginosa lectin LecA binding characteristics of divalent galactosides using multiple techniques. Glycobiology 2021; 31:1490-1499. [PMID: 34255029 PMCID: PMC8684484 DOI: 10.1093/glycob/cwab074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/02/2021] [Accepted: 07/09/2021] [Indexed: 11/14/2022] Open
Abstract
Pseudomonas aeruginosa is a widespread opportunistic pathogen that is capable of colonizing various human tissues and is resistant to many antibiotics. LecA is a galactose binding tetrameric lectin involved in adhesion, infection and biofilm formation. This study reports on the binding characteristics of mono- and divalent (chelating) ligands to LecA using different techniques. These techniques include Affinity Capillary Electrophoresis (ACE), Bio Layer Interferometry (BLI), Native Mass Spectrometry and a Thermal Shift Assay. Aspects of focus include: affinity, selectivity, binding kinetics and residence time. The affinity of a divalent ligand was determined to be in the low nanomolar range for all of the used techniques and with a ligand residence time of approximately 7 hours, while no strong binding was seen to related lectin tetramers. Each of the used techniques provides a unique and complementary insight into the chelation based binding mode of the divalent ligand to the LecA tetramer.
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Affiliation(s)
- Pouya Zaree
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Javier Sastre Torano
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Cornelis A M de Haan
- Section Virology, Division of Infectious Diseases & Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Richard A Scheltma
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, The Netherlands.,Netherlands Proteomics Centre, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Arjan Barendregt
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, The Netherlands.,Netherlands Proteomics Centre, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Vito Thijssen
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Guangyun Yu
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Frits Flesch
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Roland J Pieters
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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Bosman GP, Oliveira S, Simons PJ, Sastre Torano J, Somsen GW, Knippels LMJ, Haselberg R, Pieters RJ, Garssen J, Knipping K. Limited Lactosylation of Beta-Lactoglobulin from Cow's Milk Exerts Strong Influence on Antigenicity and Degranulation of Mast Cells. Nutrients 2021; 13:nu13062041. [PMID: 34203636 PMCID: PMC8232271 DOI: 10.3390/nu13062041] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/02/2021] [Accepted: 06/07/2021] [Indexed: 12/13/2022] Open
Abstract
Background: beta-lactoglobulin (BLG) is one of the major cow’s milk proteins and the most abundant allergen in whey. Heating is a common technologic treatment applied during milk transformational processes. Maillardation of BLG in the presence of reducing sugars and elevated temperatures may influence its antigenicity and allergenicity. Primary objective: to analyze and identify lactosylation sites by capillary electrophoresis mass spectrometry (CE-MS). Secondary objective: to assess the effect of lactosylated BLG on antigenicity and degranulation of mast cells. Methods: BLG was lactosylated at pH 7, a water activity (aw) of 0.43, and a temperature of 65 °C using a molar ratio BLG:lactose of 1:1 by incubating for 0, 3, 8, 16 or 24 h. For the determination of the effect on antibody-binding capacity of lactosylated BLG, an ELISA was performed. For the assessment of degranulation of the cell-line RBL-hεIa-2B12 transfected with the human α-chain, Fcε receptor type 1 (FcεRI) was used. Results: BLG showed saturated lactosylation between 8 and 16 incubation hours in our experimental setup. Initial stage lactosylation sites L1 (N-terminus)—K47, K60, K75, K77, K91, K138 and K141—have been identified using CE-MS. Lactosylated BLG showed a significant reduction of both the IgG binding (p = 0.0001) as well as degranulation of anti-BLG IgE-sensitized RBL-hεIa-2B12 cells (p < 0.0001). Conclusions and clinical relevance: this study shows that lactosylation of BLG decreases both the antigenicity and degranulation of mast cells and can therefore be a promising approach for reducing allergenicity of cow’s milk allergens provided that the process is well-controlled.
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Affiliation(s)
- Gerlof P. Bosman
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands; (G.P.B.); (J.S.T.); (R.J.P.)
| | - Sergio Oliveira
- Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, The Netherlands; (S.O.); (L.M.J.K.); (J.G.)
| | - Peter J. Simons
- Polpharma Biologics BV, Yalelaan 46, 3584 CM Utrecht, The Netherlands;
| | - Javier Sastre Torano
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands; (G.P.B.); (J.S.T.); (R.J.P.)
| | - Govert W. Somsen
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Life Sciences, Vrije Universiteit Amsterdam, de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands; (G.W.S.); (R.H.)
| | - Leon M. J. Knippels
- Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, The Netherlands; (S.O.); (L.M.J.K.); (J.G.)
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Rob Haselberg
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Life Sciences, Vrije Universiteit Amsterdam, de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands; (G.W.S.); (R.H.)
| | - Roland J. Pieters
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands; (G.P.B.); (J.S.T.); (R.J.P.)
| | - Johan Garssen
- Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, The Netherlands; (S.O.); (L.M.J.K.); (J.G.)
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Karen Knipping
- Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, The Netherlands; (S.O.); (L.M.J.K.); (J.G.)
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
- Correspondence: ; Tel: +31-6-46849712
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Martínez-Jothar L, Doulkeridou S, Schiffelers RM, Sastre Torano J, Oliveira S, van Nostrum CF, Hennink WE. Insights into maleimide-thiol conjugation chemistry: Conditions for efficient surface functionalization of nanoparticles for receptor targeting. J Control Release 2018. [PMID: 29526739 DOI: 10.1016/j.jconrel.2018.03.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Maleimide-thiol chemistry is widely used for the design and preparation of ligand-decorated drug delivery systems such as poly(lactide-co-glycolide) (PLGA) based nanoparticles (NPs). While many publications on nanocarriers functionalized exploiting this strategy are available in the literature, the conditions at which this reaction takes place vary among publications. This paper presents a comprehensive study on the conjugation of the peptide cRGDfK and the nanobody 11A4 (both containing a free thiol group) to maleimide functionalized PLGA NPs by means of the maleimide-thiol click reaction. The influence of different parameters, such as the nanoparticles preparation method and storage conditions as well as the molar ratio of maleimide to ligand used for conjugation, on the reaction efficiency has been evaluated. The NPs were prepared by a single or double emulsion method using different types and concentrations of surfactants and stored at 4 or 20 °C before reaction with the targeting moieties. Several maleimide to ligand molar ratios and different reaction times were studied and the conjugation efficiency was determined by quantification of the not-bound ligand by liquid chromatography. The kind of emulsion used to prepare the NPs as well as the type and concentration of surfactant used had no effect on the conjugation efficiency. Reaction between the maleimide groups present in the NPs and cRGDfK was optimal at a maleimide to thiol molar ratio of 2:1, reaching a conjugation efficiency of 84 ± 4% after 30 min at room temperature in 10 mM HEPES pH 7.0. For 11A4 nanobody the optimal reaction efficiency, 58 ± 12%, was achieved after 2 h of incubation at room temperature in PBS pH 7.4 using a 5:1 maleimide to protein molar ratio. Storage of the NPs at 4 °C for 7 days prior to their exposure to the ligands resulted in approximately 10% decrease in the reactivity of maleimide in contrast to storage at 20 °C which led to almost 40% of the maleimide being unreactive after the same storage time. Our findings demonstrate that optimization of this reaction, particularly in terms of reactant ratios, can represent a significant increase in the conjugation efficiency and prevent considerable waste of resources.
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Affiliation(s)
- Lucía Martínez-Jothar
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands
| | - Sofia Doulkeridou
- Division of Cell Biology, Department of Biology, Utrecht University, Padualaan 8, Utrecht 3584, CH, The Netherlands
| | - Raymond M Schiffelers
- Clinical Chemistry and Haematology, University Medical Center Utrecht, Heidelberglaan 100, Utrecht 3584, CX, The Netherlands
| | - Javier Sastre Torano
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands
| | - Sabrina Oliveira
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands; Division of Cell Biology, Department of Biology, Utrecht University, Padualaan 8, Utrecht 3584, CH, The Netherlands
| | - Cornelus F van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands.
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Aizpurua-Olaizola O, Sastre Torano J, Pukin A, Fu O, Boons GJ, de Jong GJ, Pieters RJ. Affinity capillary electrophoresis for the assessment of binding affinity of carbohydrate-based cholera toxin inhibitors. Electrophoresis 2017; 39:344-347. [DOI: 10.1002/elps.201700207] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 08/25/2017] [Accepted: 09/07/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Oier Aizpurua-Olaizola
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
| | - Javier Sastre Torano
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
| | - Aliaksei Pukin
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
| | - Ou Fu
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
| | - Geert Jan Boons
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
| | - Gerhardus J. de Jong
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
| | - Roland J. Pieters
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht Netherlands
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