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Hierro-Oliva M, Gallardo-Moreno AM, González-Martín ML. Surface Characterisation of Human Serum Albumin Layers on Activated Ti6Al4V. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7416. [PMID: 34885570 PMCID: PMC8658959 DOI: 10.3390/ma14237416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/22/2021] [Accepted: 11/30/2021] [Indexed: 12/14/2022]
Abstract
Adpsortion of protein layers on biomaterials plays an important role in the interactions between implants and the bio-environment. In this context, human serum albumin (HSA) layers have been deposited on modified Ti6Al4V surfaces at different ultraviolet (UV-C) irradiation times to observe possible changes in the adsorbed protein layer. Protein adsorption was done from solutions at concentraions lower than the serum protein concentration, to follow the surface modifications at the beginning of the albumin adhesion process. For this purpose, the surface of the protein-coated samples has been characterized by time of flight secondary ion mass spectrometry (ToF-SIMS), contact angle and zeta potential measurements. The results obtained show a reduction in the total surface tension and zeta potential of samples treated with UV-C light when coated with a protein layer. Furthermore, the UV-C light treatment applied to titanium alloy surfaces is able to modify the conformation, orientation and packing of the proteins arranged in the adsorbed layer. Low irradiation time generates an unstable surface with the lowest protein adsorption and the highest hydrophobic/hydrophilic protein ratio, indicating a possible denaturalization of the protein on these surfaces. However, surface changes are stabilized after 15 h or UV-C irradiation, favoring the protein adsorption through electrical interactions.
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Affiliation(s)
- Margarita Hierro-Oliva
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 06006 Badajoz, Spain; (M.H.-O.); (M.L.G.-M.)
- Department of Applied Physics, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain
- University Institute of Extremadura Sanity Research (INUBE), 06006 Badajoz, Spain
| | - Amparo M. Gallardo-Moreno
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 06006 Badajoz, Spain; (M.H.-O.); (M.L.G.-M.)
- Department of Applied Physics, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain
- University Institute of Extremadura Sanity Research (INUBE), 06006 Badajoz, Spain
| | - María Luisa González-Martín
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 06006 Badajoz, Spain; (M.H.-O.); (M.L.G.-M.)
- Department of Applied Physics, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain
- University Institute of Extremadura Sanity Research (INUBE), 06006 Badajoz, Spain
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Interaction of Aluminum-adjuvanted Recombinant P[4] Protein Antigen With Preservatives: Storage Stability and Backbone Flexibility Studies. J Pharm Sci 2021; 111:970-981. [PMID: 34758340 DOI: 10.1016/j.xphs.2021.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 11/01/2021] [Accepted: 11/01/2021] [Indexed: 11/24/2022]
Abstract
Eight antimicrobial preservatives used in parenteral multidose formulations (thimerosal, 2-phenoxy ethanol, phenol, benzyl alcohol, m-cresol, chlorobutanol, methyl paraben, propyl paraben) were examined for their effects on the storage stability (4 °C, 25 °C) of an Alhydrogel® (AH) adjuvanted formulation of the non-replicating rotavirus vaccine (NRRV) recombinant P[4] protein antigen. The stability of AH-adsorbed P[4] was monitored for antigen-antibody binding, conformational stability, and antigen-adjuvant interaction via competitive ELISA, DSC, and SDS-PAGE, respectively. There was an unexpected correlation between increasing storage stability of the AH-adsorbed P[4] and preservative hydrophobicity (log P) (e.g., the parabens and chlorobutanol were least destabilizing). We used hydrogen exchange-mass spectrometry (HX-MS) to better understand the destabilizing effects of temperature and preservative on backbone flexibility of AH-adsorbed P[4]. Thimerosal addition immediately increased the backbone flexibility across much of the AH-adsorbed P[4] protein backbone (except the N-terminal P2 region and residues G17-Y38), and further increase in P[4] backbone flexibility was observed after storage (4 °C, 4 weeks). HX-MS analysis of AH-adsorbed P[4] stored for 4 weeks at 25 °C revealed structural alterations in some regions of the epitope involved in P[4] specific mAb binding. These combined results are discussed in terms of a generalized workflow for multi-dose vaccine formulation development for recombinant protein antigens.
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Spreen H, Behrens M, Mulac D, Humpf HU, Langer K. Identification of main influencing factors on the protein corona composition of PLGA and PLA nanoparticles. Eur J Pharm Biopharm 2021; 163:212-222. [PMID: 33862242 DOI: 10.1016/j.ejpb.2021.04.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/05/2021] [Accepted: 04/07/2021] [Indexed: 10/21/2022]
Abstract
Poly(DL-lactic-co-glycolic acid) and poly(DL-lactic acid) are widely used for the preparation of nanoparticles due to favorable characteristics for medical use like biodegradability and controllable degradation behavior. The contact with different media like human plasma or serum leads to the formation of a protein corona that determines the NP's in vivo processing. In this study, the impact of surface end group identity, matrix polymer hydrophobicity, molecular weight, and incubation medium on the protein corona composition was evaluated. Corona proteins were quantified using Bradford assay, separated by SDS-PAGE, and identified via LC-MS/MS. The acquired data revealed that surface end group identity had the most profound effect on corona composition in both quantitative and qualitative terms. Regarding matrix polymer hydrophobicity, adsorption profiles on NP systems with similar physicochemical characteristics resembled each other. The molecular weight of the matrix polymers proved to impact quantity, but not quality of corona bound proteins. The corona of plasma incubated NP showed adsorption of incubation medium-specific proteins but resembled those of serum incubated NP in terms of protein function, average mass and isoelectric point. Overall, the NP physicochemical properties proved to be easily adjustable determining factors of protein corona formation in physiological environments.
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Affiliation(s)
- Hendrik Spreen
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr, 48149 Muenster, Germany
| | - Matthias Behrens
- Institute of Food Chemistry, University of Muenster, Corrensstr, 48149 Muenster, Germany
| | - Dennis Mulac
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr, 48149 Muenster, Germany
| | - Hans-Ulrich Humpf
- Institute of Food Chemistry, University of Muenster, Corrensstr, 48149 Muenster, Germany
| | - Klaus Langer
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstr, 48149 Muenster, Germany.
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Grigolato F, Arosio P. The role of surfaces on amyloid formation. Biophys Chem 2021; 270:106533. [PMID: 33529995 DOI: 10.1016/j.bpc.2020.106533] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/18/2020] [Accepted: 12/18/2020] [Indexed: 01/02/2023]
Abstract
Interfaces can strongly accelerate or inhibit protein aggregation, destabilizing proteins that are stable in solution or, conversely, stabilizing proteins that are aggregation-prone. Although this behaviour is well-known, our understanding of the molecular mechanisms underlying surface-induced protein aggregation is still largely incomplete. A major challenge is represented by the high number of physico-chemical parameters involved, which are highly specific to the considered combination of protein, surface properties, and solution conditions. The key aspect determining the role of interfaces is the relative propensity of the protein to aggregate at the surface with respect to bulk. In this review, we discuss the multiple molecular determinants that regulate this balance. We summarize current experimental techniques aimed at characterizing protein aggregation at interfaces, and highlight the need to complement experimental analysis with theoretical modelling. In particular, we illustrate how chemical kinetic analysis can be combined with experimental methods to provide insights into the molecular mechanisms underlying surface-induced protein aggregation, under both stagnant and agitation conditions. We summarize recent progress in the study of important amyloids systems, focusing on selected relevant interfaces.
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Affiliation(s)
- Fulvio Grigolato
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich 8093, Switzerland
| | - Paolo Arosio
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich 8093, Switzerland.
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Kim J. Systematic approach to characterize the dynamics of protein adsorption on the surface of biomaterials using proteomics. Colloids Surf B Biointerfaces 2020; 188:110756. [DOI: 10.1016/j.colsurfb.2019.110756] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 12/03/2019] [Accepted: 12/23/2019] [Indexed: 01/08/2023]
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de Vos WM, Lindhoud S. Overcharging and charge inversion: Finding the correct explanation(s). Adv Colloid Interface Sci 2019; 274:102040. [PMID: 31698305 DOI: 10.1016/j.cis.2019.102040] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/04/2019] [Accepted: 09/25/2019] [Indexed: 11/29/2022]
Abstract
Both overcharging and charge inversion denote a general observation that the sign of a surface charge can flip in the presence of interacting species such as surfactants, polyelectrolytes, proteins and multivalent ions. Moreover, charge inversion of proteins through charge regulation, is one explanation for protein adsorption to similarly charged surfaces. While overcharging and charge inversion have been long studied, the explanations for these phenomena are often still debated. Broadly these explanations can be categorized as "chemical" where specific attractive interactions are seen as the cause of charge inversion, and "physical" where purely electrostatic interactions and constraints of geometry are used as explanation. In this review, charge inversion is discussed from a very broad viewpoint, where we draw connections between the various explanations proposed for very different systems. Especially, we highlight the work of Johannes Lyklema, who always carefully balanced between the competing chemical and physical explanations, and demonstrated that only few experimental systems allow just a single explanation.
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Affiliation(s)
- Wiebe M de Vos
- Membrane Surface Science, University of Twente, MESA+ Institute for Nanotechnology, P.O. Box 217, 7500 AE Enschede, the Netherlands
| | - Saskia Lindhoud
- Nanobiophysics, University of Twente, MESA+ Institute for Nanotechnology, P.O. Box 217, 7500 AE Enschede, the Netherlands.
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Bolivar JM, Nidetzky B. On the relationship between structure and catalytic effectiveness in solid surface-immobilized enzymes: Advances in methodology and the quest for a single-molecule perspective. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1868:140333. [PMID: 31778816 DOI: 10.1016/j.bbapap.2019.140333] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/05/2019] [Accepted: 11/22/2019] [Indexed: 12/31/2022]
Abstract
The integration of enzymes with solid materials is important in many biotechnological applications, including the use of immobilized enzymes for biocatalytic synthesis. The development of functional enzyme-material composites is restrained by the lack of molecular-level insight into the behavior of enzymes in confined, surface-near environments. Here, we review recent advances in surface-sensitive spectroscopic techniques that push boundaries for the determination of enzyme structure and orientation at the solid-liquid interface. We discuss recent evidence from single-molecule studies showing that analyses sensitive to the temporal and spatial heterogeneities in immobilized enzymes can succeed in disentangling the effects of conformational stability and active-site accessibility on activity. Different immobilization methods involve distinct trade-off between these effects, thus emphasizing the need for a holistic (systems) view of immobilized enzymes for the rational development of practical biocatalysts.
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Affiliation(s)
- Juan M Bolivar
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, A-8010 Graz, Austria; Austrian Centre of Industrial Biotechnology, Petersgasse 12, A-8010 Graz, Austria; Chemical and Materials Engineering Department, Complutense University of Madrid, 28040 Madrid, Spain
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, A-8010 Graz, Austria; Austrian Centre of Industrial Biotechnology, Petersgasse 12, A-8010 Graz, Austria.
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Rahmati M, Mozafari M. Biocompatibility of alumina‐based biomaterials–A review. J Cell Physiol 2018; 234:3321-3335. [DOI: 10.1002/jcp.27292] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 07/31/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Maryam Rahmati
- Department of Nanotechnology and Advanced Materials Bioengineering Research Group, Materials and Energy Research Center (MERC) Tehran Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences Tehran Iran
| | - Masoud Mozafari
- Department of Nanotechnology and Advanced Materials Bioengineering Research Group, Materials and Energy Research Center (MERC) Tehran Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences Tehran Iran
- Department of Tissue Engineering & Regenerative Medicine Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences Tehran Iran
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Mathematical modeling approaches to describe the dynamics of protein adsorption at solid interfaces. Colloids Surf B Biointerfaces 2018; 162:370-379. [DOI: 10.1016/j.colsurfb.2017.12.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/21/2017] [Accepted: 12/06/2017] [Indexed: 11/22/2022]
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Srinivasu BY, Bose B, Mitra G, Kurpad AV, Mandal AK. Adsorption Induced Changes of Human Hemoglobin on Ferric Pyrophosphate Nanoparticle Surface Probed by Isotope Exchange Mass Spectrometry: An Implication on Structure-Function Correlation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8032-8042. [PMID: 28727441 DOI: 10.1021/acs.langmuir.7b01905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In general, proteins in the biological system interact with nanoparticles (NPs) via adsorption on the particle surface. Understanding the adsorption at the molecular level is crucial to explore NP-protein interactions. The increasing concerns about the risk to human health on NP exposure have been explored through the discovery of a handful protein biomarkers and biochemical analysis. However, detailed information on structural perturbation and associated functional changes of proteins on interaction with NPs is limited. Erythrocytes (red blood cells) are devoid of defense mechanism of protecting NP penetration through endocytosis. Therefore, it is important to investigate the interaction of erythrocyte proteins with NPs. Hemoglobin, the most abundant protein of human erythrocyte, is a tetrameric molecule consisting of α- and β-globin chains in duplicate. In the present study, we have used hemoglobin as a model system to investigate NP-protein interaction with ferric pyrophosphate NPs [NP-Fe4(P2O7)3]. We report the formation of a bioconjugate of hemoglobin upon adsorption to NP-Fe4(P2O7)3 surface. Analysis of the bioconjugate indicated that Fe3+ ion of NP-Fe4(P2O7)3 contributed in the bioconjugate formation. Using hydrogen/deuterium exchange based mass spectrometry, it was observed that the amino termini of α- and β-globin chains of hemoglobin were involved in the adsorption on NP surface whereas the carboxy termini of both chains became more flexible in its conformation compared to the respective regions of the normal hemoglobin. Circular dichroism spectra of desorbed hemoglobin indicated an adsorption induced localized structural change in the protein molecule. The formation of bioconjugate led to functional alteration of hemoglobin, as probed by oxygen binding assay. Thus, we hypothesize that the large amount of energy released upon adsorption of hemoglobin to NP surface might be the fundamental cause of structural perturbation of human hemoglobin and subsequent formation of the bioconjugate with an altered function.
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Affiliation(s)
- Bindu Y Srinivasu
- Clinical Proteomics Unit, Division of Molecular Medicine, St. John's Research Institute, St. John's National Academy of Health Sciences , 100 ft road, Koramangala, Bangalore 560034, India
| | - Beena Bose
- Department of Physiology, St John's Medical College, and Division of Nutrition, St. John's Research Institute, St. John's National Academy of Health Sciences , 100 ft road, Koramangala, Bangalore 560034, India
| | - Gopa Mitra
- Clinical Proteomics Unit, Division of Molecular Medicine, St. John's Research Institute, St. John's National Academy of Health Sciences , 100 ft road, Koramangala, Bangalore 560034, India
| | - Anura V Kurpad
- Department of Physiology, St John's Medical College, and Division of Nutrition, St. John's Research Institute, St. John's National Academy of Health Sciences , 100 ft road, Koramangala, Bangalore 560034, India
| | - Amit K Mandal
- Clinical Proteomics Unit, Division of Molecular Medicine, St. John's Research Institute, St. John's National Academy of Health Sciences , 100 ft road, Koramangala, Bangalore 560034, India
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New insights into the interaction mechanism of humic acids with phillipsite. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1158-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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