1
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Gochev GG, Campbell RA, Schneck E, Zawala J, Warszynski P. Exploring proteins at soft interfaces and in thin liquid films - From classical methods to advanced applications of reflectometry. Adv Colloid Interface Sci 2024; 329:103187. [PMID: 38788307 DOI: 10.1016/j.cis.2024.103187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/12/2024] [Accepted: 05/12/2024] [Indexed: 05/26/2024]
Abstract
The history of the topic of proteins at soft interfaces dates back to the 19th century, and until the present day, it has continuously attracted great scientific interest. A multitude of experimental methods and theoretical approaches have been developed to serve the research progress in this large domain of colloid and interface science, including the area of soft colloids such as foams and emulsions. From classical methods like surface tension adsorption isotherms, surface pressure-area measurements for spread layers, and surface rheology probing the dynamics of adsorption, nowadays, advanced surface-sensitive techniques based on spectroscopy, microscopy, and the reflection of light, X-rays and neutrons at liquid/fluid interfaces offers important complementary sources of information. Apart from the fundamental characteristics of protein adsorption layers, i.e., surface tension and surface excess, the nanoscale structure of such layers and the interfacial protein conformations and morphologies are of pivotal importance for extending the depth of understanding on the topic. In this review article, we provide an extensive overview of the application of three methods, namely, ellipsometry, X-ray reflectometry and neutron reflectometry, for adsorption and structural studies on proteins at water/air and water/oil interfaces. The main attention is placed on the development of experimental approaches and on a discussion of the relevant achievements in terms of notable experimental results. We have attempted to cover the whole history of protein studies with these techniques, and thus, we believe the review should serve as a valuable reference to fuel ideas for a wide spectrum of researchers in different scientific fields where proteins at soft interface may be of relevance.
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Affiliation(s)
- Georgi G Gochev
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30239 Krakow, Poland; Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
| | - Richard A Campbell
- Division of Pharmacy and Optometry, University of Manchester, M13 9PT Manchester, UK
| | - Emanuel Schneck
- Physics Department, Technical University Darmstadt, 64289 Darmstadt, Germany
| | - Jan Zawala
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30239 Krakow, Poland
| | - Piotr Warszynski
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30239 Krakow, Poland
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2
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Saurabh S, Lei L, Li Z, Seddon JM, Lu JR, Kalonia C, Bresme F. Adsorption of monoclonal antibody fragments at the water-oil interface: A coarse-grained molecular dynamics study. APL Bioeng 2024; 8:026128. [PMID: 38948350 PMCID: PMC11211994 DOI: 10.1063/5.0207959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 06/06/2024] [Indexed: 07/02/2024] Open
Abstract
Monoclonal antibodies (mAbs) can undergo structural changes due to interaction with oil-water interfaces during storage. Such changes can lead to aggregation, resulting in a loss of therapeutic efficacy. Therefore, understanding the microscopic mechanism controlling mAb adsorption is crucial to developing strategies that can minimize the impact of interfaces on the therapeutic properties of mAbs. In this study, we used MARTINI coarse-grained molecular dynamics simulations to investigate the adsorption of the Fab and Fc domains of the monoclonal antibody COE3 at the oil-water interface. Our aim was to determine the regions on the protein surface that drive mAb adsorption. We also investigate the role of protein concentration on protein orientation and protrusion to the oil phase. While our structural analyses compare favorably with recent neutron reflectivity measurements, we observe some differences. Unlike the monolayer at the interface predicted by neutron reflectivity experiments, our simulations indicate the presence of a secondary diffused layer near the interface. We also find that under certain conditions, protein-oil interaction can lead to a considerable distortion in the protein structure, resulting in enhanced adsorption behavior.
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Affiliation(s)
- Suman Saurabh
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College, W12 0BZ London, United Kingdom
| | - Li Lei
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College, W12 0BZ London, United Kingdom
| | - Zongyi Li
- Biological Physics Group, School of Physics and Astronomy, Faculty of Science and Engineering, Oxford Road, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - John M. Seddon
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College, W12 0BZ London, United Kingdom
| | - Jian R. Lu
- Biological Physics Group, School of Physics and Astronomy, Faculty of Science and Engineering, Oxford Road, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Cavan Kalonia
- Dosage Form Design and Development, BioPharmaceutical Development, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland 20878, USA
| | - Fernando Bresme
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College, W12 0BZ London, United Kingdom
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3
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Saurabh S, Zhang Q, Li Z, Seddon JM, Kalonia C, Lu JR, Bresme F. Mechanistic Insights into the Adsorption of Monoclonal Antibodies at the Water/Vapor Interface. Mol Pharm 2024; 21:704-717. [PMID: 38194618 PMCID: PMC10848294 DOI: 10.1021/acs.molpharmaceut.3c00821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 01/11/2024]
Abstract
Monoclonal antibodies (mAbs) are active components of therapeutic formulations that interact with the water-vapor interface during manufacturing, storage, and administration. Surface adsorption has been demonstrated to mediate antibody aggregation, which leads to a loss of therapeutic efficacy. Controlling mAb adsorption at interfaces requires a deep understanding of the microscopic processes that lead to adsorption and identification of the protein regions that drive mAb surface activity. Here, we report all-atom molecular dynamics (MD) simulations of the adsorption behavior of a full IgG1-type antibody at the water/vapor interface. We demonstrate that small local changes in the protein structure play a crucial role in promoting adsorption. Also, interfacial adsorption triggers structural changes in the antibody, potentially contributing to the further enhancement of surface activity. Moreover, we identify key amino acid sequences that determine the adsorption of antibodies at the water-air interface and outline strategies to control the surface activity of these important therapeutic proteins.
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Affiliation(s)
- Suman Saurabh
- Department
of Chemistry, Molecular Sciences Research
Hub Imperial College, London W12 0BZ, U.K.
| | - Qinkun Zhang
- Department
of Chemistry, Molecular Sciences Research
Hub Imperial College, London W12 0BZ, U.K.
| | - Zongyi Li
- Biological
Physics Group, School of Physics and Astronomy, Faculty of Science
and Engineering, the University of Manchester, Manchester M13 9PL, U.K.
| | - John M. Seddon
- Department
of Chemistry, Molecular Sciences Research
Hub Imperial College, London W12 0BZ, U.K.
| | - Cavan Kalonia
- Dosage
Form Design and Development, BioPharmaceutical Development, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland 20878, United States
| | - Jian R. Lu
- Biological
Physics Group, School of Physics and Astronomy, Faculty of Science
and Engineering, the University of Manchester, Manchester M13 9PL, U.K.
| | - Fernando Bresme
- Department
of Chemistry, Molecular Sciences Research
Hub Imperial College, London W12 0BZ, U.K.
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4
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Coliat P, Erb S, Diemer H, Karouby D, Martin T, Banerjee M, Zhu C, Demarchi M, Cianférani S, Detappe A, Pivot X. Influence of pneumatic transportation on the stability of monoclonal antibodies. Sci Rep 2023; 13:21875. [PMID: 38072852 PMCID: PMC10710995 DOI: 10.1038/s41598-023-49235-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
Pneumatic transportation systems (PTS) were recently proposed as a method to carry ready-for-injection diluted monoclonal antibodies (mAbs) from the pharmacy to the bedside of patients. This method reduces transportation time and improves the efficiency of drug distribution process. However, mAbs are highly sensitive molecules for which subtle alterations may lead to deleterious clinical effects. These alterations can be caused by various external factors such as temperature, pH, pressure, and mechanical forces that may occur during transportation. Hence, it is essential to ensure that the mAbs transported by PTS remain stable and active throughout the transportation process. This study aims to determine the safety profile of PTS to transport 11 routinely used mAbs in a clinical setting through assessment of critical quality attributes (CQA) and orthogonal analysis. Hence, we performed aggregation/degradation profiling, post-translational modifications identification using complementary mass spectrometry-based methods, along with visible and subvisible particle formation determination by light absorbance and light obscuration analysis. Altogether, these results highlight that PTS can be safely used for this purpose when air is removed from the bags during preparation.
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Affiliation(s)
- Pierre Coliat
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France.
| | - Stéphane Erb
- Institut Pluridisciplinaire Hubert Curien, CNRS UMR7178, Université de Strasbourg, Strasbourg, France
- Institut du Médicament Strasbourg, Strasbourg, France
- Infrastructure Nationale de Protéomique ProFI-FR2048, Strasbourg, France
| | - Hélène Diemer
- Institut Pluridisciplinaire Hubert Curien, CNRS UMR7178, Université de Strasbourg, Strasbourg, France
- Institut du Médicament Strasbourg, Strasbourg, France
- Infrastructure Nationale de Protéomique ProFI-FR2048, Strasbourg, France
| | - Dan Karouby
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
| | - Tristan Martin
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
| | - Mainak Banerjee
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
| | - Chen Zhu
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
| | - Martin Demarchi
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
| | - Sarah Cianférani
- Institut Pluridisciplinaire Hubert Curien, CNRS UMR7178, Université de Strasbourg, Strasbourg, France
- Institut du Médicament Strasbourg, Strasbourg, France
- Infrastructure Nationale de Protéomique ProFI-FR2048, Strasbourg, France
| | - Alexandre Detappe
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
- Institut Pluridisciplinaire Hubert Curien, CNRS UMR7178, Université de Strasbourg, Strasbourg, France
- Institut du Médicament Strasbourg, Strasbourg, France
| | - Xavier Pivot
- Institut de Cancérologie Strasbourg Europe, ICANS, 17 Rue Albert Calmette, Strasbourg, France
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5
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Pham KG, Thompson BR, Wang T, Samaddar S, Qian KK, Liu Y, Wagner NJ. Interfacial Pressure and Viscoelasticity of Antibodies and Their Correlation to Long-Term Stability in Formulation. J Phys Chem B 2023; 127:9724-9733. [PMID: 37917554 DOI: 10.1021/acs.jpcb.3c05900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
Monoclonal antibodies (mAbs) form viscoelastic gel-like layers at the air-water interface due to their amphiphilic nature, and this same protein characteristic can lead to undesired aggregation of proteins in therapeutic formulations. We hypothesize that the interfacial viscoelasticity and surface pressure of mAbs at the air-water interface will correlate with their long-term stability. To test this hypothesis, the interfacial viscoelastic rheology and surface pressure of five different antibodies with varying visible particle counts from a three-year stability study were measured. We find that both the surface pressures and interfacial elastic moduli correlate well with the long-time mAb solution stability within a class of mAbs with the interfacial elastic moduli being particularly sensitive to discriminate between stable and unstable mAbs across a range of formulations. Furthermore, X-ray reflectivity was used to gain insight into the interfacial structure of mAbs at the air-water interface, providing a possible molecular mechanism to explain the relationship between interfacial elastic moduli and the long-term stability.
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Affiliation(s)
- Kiet G Pham
- Department of Chemical & Biomolecular Engineering, Center for Neutron Science, University of Delaware, Delaware 19716, United States
| | - Benjamin R Thompson
- Department of Chemical & Biomolecular Engineering, Center for Neutron Science, University of Delaware, Delaware 19716, United States
| | - Tingting Wang
- Eli Lilly and Company, Indianapolis, Indiana 46225, United States
| | - Shayak Samaddar
- Eli Lilly and Company, Indianapolis, Indiana 46225, United States
| | - Ken K Qian
- Eli Lilly and Company, Indianapolis, Indiana 46225, United States
| | - Yun Liu
- Department of Chemical & Biomolecular Engineering, Center for Neutron Science, University of Delaware, Delaware 19716, United States
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Norman J Wagner
- Department of Chemical & Biomolecular Engineering, Center for Neutron Science, University of Delaware, Delaware 19716, United States
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6
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Kanthe AD, Carnovale MR, Katz JS, Jordan S, Krause ME, Zheng S, Ilott A, Ying W, Bu W, Bera MK, Lin B, Maldarelli C, Tu RS. Differential Surface Adsorption Phenomena for Conventional and Novel Surfactants Correlates with Changes in Interfacial mAb Stabilization. Mol Pharm 2022; 19:3100-3113. [PMID: 35882380 PMCID: PMC9450885 DOI: 10.1021/acs.molpharmaceut.2c00152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein adsorption on surfaces can result in loss of drug product stability and efficacy during the production, storage, and administration of protein-based therapeutics. Surface-active agents (excipients) are typically added in protein formulations to prevent undesired interactions of proteins on surfaces and protein particle formation/aggregation in solution. The objective of this work is to understand the molecular-level competitive adsorption mechanism between the monoclonal antibody (mAb) and a commercially used excipient, polysorbate 80 (PS80), and a novel excipient, N-myristoyl phenylalanine-N-polyetheramine diamide (FM1000). The relative rate of adsorption of PS80 and FM1000 was studied by pendant bubble tensiometry. We find that FM1000 saturates the interface faster than PS80. Additionally, the surface-adsorbed amounts from X-ray reflectivity (XRR) measurements show that FM1000 blocks a larger percentage of interfacial area than PS80, indicating that a lower bulk FM1000 surface concentration is sufficient to prevent protein adsorption onto the air/water interface. XRR models reveal that with an increase in mAb concentration (0.5-2.5 mg/mL: IV based formulations), an increased amount of PS80 concentration (below critical micelle concentration, CMC) is required, whereas a fixed value of FM1000 concentration (above its relatively lower CMC) is sufficient to inhibit mAb adsorption, preventing mAb from co-existing with surfactants on the surface layer. With this observation, we show that the CMC of the surfactant is not the critical factor to indicate its ability to inhibit protein adsorption, especially for chemically different surfactants, PS80 and FM1000. Additionally, interface-induced aggregation studies indicate that at minimum surfactant concentration levels in protein formulations, fewer protein particles form in the presence of FM1000. Our results provide a mechanistic link between the adsorption of mAbs at the air/water interface and the aggregation induced by agitation in the presence of surfactants.
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Affiliation(s)
- Ankit D Kanthe
- Sterile Product Development, Bristol Myers Squibb, New Brunswick, New Jersey 08901, United States.,Department of Chemical Engineering, The City College of New York, New York, New York 10031, United States
| | - Miriam R Carnovale
- Pharma Solutions R&D, International Flavors and Fragrances, Wilmington, Delaware 19803, United States
| | - Joshua S Katz
- Pharma Solutions R&D, International Flavors and Fragrances, Wilmington, Delaware 19803, United States
| | - Susan Jordan
- Pharma Solutions R&D, International Flavors and Fragrances, Wilmington, Delaware 19803, United States
| | - Mary E Krause
- Sterile Product Development, Bristol Myers Squibb, New Brunswick, New Jersey 08901, United States
| | - Songyan Zheng
- Sterile Product Development, Bristol Myers Squibb, New Brunswick, New Jersey 08901, United States
| | - Andrew Ilott
- Sterile Product Development, Bristol Myers Squibb, New Brunswick, New Jersey 08901, United States
| | - William Ying
- Sterile Product Development, Bristol Myers Squibb, New Brunswick, New Jersey 08901, United States
| | - Wei Bu
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 606371, United States
| | - Mrinal K Bera
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 606371, United States
| | - Binhua Lin
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 606371, United States
| | - Charles Maldarelli
- Department of Chemical Engineering, The City College of New York, New York, New York 10031, United States.,Levich Institute, The City College of New York, New York, New York 10031, United States
| | - Raymond S Tu
- Department of Chemical Engineering, The City College of New York, New York, New York 10031, United States
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7
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Assessment of Therapeutic Antibody Developability by Combinations of In Vitro and In Silico Methods. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2313:57-113. [PMID: 34478132 DOI: 10.1007/978-1-0716-1450-1_4] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Although antibodies have become the fastest-growing class of therapeutics on the market, it is still challenging to develop them for therapeutic applications, which often require these molecules to withstand stresses that are not present in vivo. We define developability as the likelihood of an antibody candidate with suitable functionality to be developed into a manufacturable, stable, safe, and effective drug that can be formulated to high concentrations while retaining a long shelf life. The implementation of reliable developability assessments from the early stages of antibody discovery enables flagging and deselection of potentially problematic candidates, while focussing available resources on the development of the most promising ones. Currently, however, thorough developability assessment requires multiple in vitro assays, which makes it labor intensive and time consuming to implement at early stages. Furthermore, accurate in vitro analysis at the early stage is compromised by the high number of potential candidates that are often prepared at low quantities and purity. Recent improvements in the performance of computational predictors of developability potential are beginning to change this scenario. Many computational methods only require the knowledge of the amino acid sequences and can be used to identify possible developability issues or to rank available candidates according to a range of biophysical properties. Here, we describe how the implementation of in silico tools into antibody discovery pipelines is increasingly offering time- and cost-effective alternatives to in vitro experimental screening, thus streamlining the drug development process. We discuss in particular the biophysical and biochemical properties that underpin developability potential and their trade-offs, review various in vitro assays to measure such properties or parameters that are predictive of developability, and give an overview of the growing number of in silico tools available to predict properties important for antibody development, including the CamSol method developed in our laboratory.
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8
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Kanthe A, Ilott A, Krause M, Zheng S, Li J, Bu W, Bera MK, Lin B, Maldarelli C, Tu RS. No ordinary proteins: Adsorption and molecular orientation of monoclonal antibodies. SCIENCE ADVANCES 2021; 7:eabg2873. [PMID: 34452912 PMCID: PMC8397265 DOI: 10.1126/sciadv.abg2873] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 07/07/2021] [Indexed: 06/12/2023]
Abstract
The interaction of monoclonal antibodies (mAbs) with air/water interfaces plays a crucial role in their overall stability in solution. We aim to understand this behavior using pendant bubble measurements to track the dynamic tension reduction and x-ray reflectivity to obtain the electron density profiles (EDPs) at the surface. Native immunoglobulin G mAb is a rigid molecule with a flat, "Y" shape, and simulated EDPs are obtained by rotating a homology construct at the surface. Comparing simulations with experimental EDPs, we obtain surface orientation probability maps showing mAbs transition from flat-on Y-shape configurations to side-on or end-on configurations with increasing concentration. The modeling also shows the presence of β sheets at the surface. Overall, the experiments and the homology modeling elucidate the orientational phase space during different stages of adsorption of mAbs at the air/water interface. These finding will help define new strategies for the manufacture and storage of antibody-based therapeutics.
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Affiliation(s)
- Ankit Kanthe
- Department of Chemical Engineering, The City College of New York, New York, NY 10031, USA
| | - Andrew Ilott
- Drug Product Development, Bristol Myers Squibb, New Brunswick, NJ 08901, USA
| | - Mary Krause
- Drug Product Development, Bristol Myers Squibb, New Brunswick, NJ 08901, USA
| | - Songyan Zheng
- Drug Product Development, Bristol Myers Squibb, New Brunswick, NJ 08901, USA
| | - Jinjiang Li
- Pharmaceutical Development, Wolfe Laboratories, Watertown, MA, 01801, USA
| | - Wei Bu
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 606371, USA
| | - Mrinal K Bera
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 606371, USA
| | - Binhua Lin
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 606371, USA
| | - Charles Maldarelli
- Department of Chemical Engineering, The City College of New York, New York, NY 10031, USA.
- Levich Institute, The City College of New York, New York, NY 10031, USA
| | - Raymond S Tu
- Department of Chemical Engineering, The City College of New York, New York, NY 10031, USA.
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9
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Pan F, Aaron Lau KH, Messersmith PB, Lu JR, Zhao X. Interfacial Assembly Inspired by Marine Mussels and Antifouling Effects of Polypeptoids: A Neutron Reflection Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12309-12318. [PMID: 32970448 PMCID: PMC7586401 DOI: 10.1021/acs.langmuir.0c02247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Polypeptoid-coated surfaces and many surface-grafted hydrophilic polymer brushes have been proven efficient in antifouling-the prevention of nonspecific biomolecular adsorption and cell attachment. Protein adsorption, in particular, is known to mediate subsequent cell-surface interactions. However, the detailed antifouling mechanism of polypeptoid and other polymer brush coatings at the molecular level is not well understood. Moreover, most adsorption studies focus only on measuring a single adsorbed mass value, and few techniques are capable of characterizing the hydrated in situ layer structure of either the antifouling coating or adsorbed proteins. In this study, interfacial assembly of polypeptoid brushes with different chain lengths has been investigated in situ using neutron reflection (NR). Consistent with past simulation results, NR revealed a common two-step structure for grafted polypeptoids consisting of a dense inner region that included a mussel adhesive-inspired oligopeptide for grafting polypeptoid chains and a highly hydrated upper region with very low polymer density (molecular brush). Protein adsorption was studied with human serum albumin (HSA) and fibrinogen (FIB), two common serum proteins of different sizes but similar isoelectric points (IEPs). In contrast to controls, we observed higher resistance by grafted polypeptoid against adsorption of the larger FIB, especially for longer chain lengths. Changing the pH to close to the IEPs of the proteins, which generally promotes adsorption, also did not significantly affect the antifouling effect against FIB, which was corroborated by atomic force microscopy imaging. Moreover, NR enabled characterization of the in situ hydrated layer structures of the polypeptoids together with proteins adsorbed under selected conditions. While adsorption on bare SiO2 controls resulted in surface-induced protein denaturation, this was not observed on polypeptoids. Our current results therefore highlight the detailed in situ view that NR may provide for characterizing protein adsorption on polymer brushes as well as the excellent antifouling behavior of polypeptoids.
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Affiliation(s)
- Fang Pan
- School
of Pharmacy, Changzhou University, Changzhou 213164, China
- School
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - King Hang Aaron Lau
- Department
of Pure & Applied Chemistry, University
of Strathclyde, Glasgow G1 1XL, U.K.
| | - Phillip B. Messersmith
- Department
of Materials Science and Engineering, Department of Bioengineering, University of California−Berkeley, Berkeley California 94720, United States
| | - Jian R. Lu
- School
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Xiubo Zhao
- School
of Pharmacy, Changzhou University, Changzhou 213164, China
- Department
of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, U.K.
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10
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Gong H, Liao M, Hu X, Fa K, Phanphak S, Ciumac D, Hollowell P, Shen K, Clifton LA, Campana M, Webster JRP, Fragneto G, Waigh TA, McBain AJ, Lu JR. Aggregated Amphiphilic Antimicrobial Peptides Embedded in Bacterial Membranes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:44420-44432. [PMID: 32909733 DOI: 10.1021/acsami.0c09931] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Molecular dynamics (MD) simulations, stochastic optical reconstruction microscopy (STORM), and neutron reflection (NR) were combined to explore how antimicrobial peptides (AMPs) can be designed to promote the formation of nanoaggregates in bacterial membranes and impose effective bactericidal actions. Changes in the hydrophobicity of the designed AMPs were found to have a strong influence on their bactericidal potency and cytotoxicity. G(IIKK)3I-NH2 (G3) achieved low minimum inhibition concentrations (MICs) and effective dynamic kills against both antibiotic-resistant and -susceptible bacteria. However, a G3 derivative with weaker hydrophobicity, KI(KKII)2I-NH2 (KI), exhibited considerably lower membrane-lytic activity. In contrast, the more hydrophobic G(ILKK)3L-NH2 (GL) peptide achieved MICs similar to those observed for G3 but with worsened hemolysis. Both the model membranes studied by Brewster angle microscopy, zeta potential measurements, and NR and the real bacterial membranes examined with direct STORM contained membrane-inserted peptide aggregates upon AMP exposure. These structural features were well supported by MD simulations. By revealing how AMPs self-assemble in microbial membranes, this work provides important insights into AMP mechanistic actions and allows further fine-tuning of antimicrobial potency and cytotoxicity.
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Affiliation(s)
- Haoning Gong
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Mingrui Liao
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Xuzhi Hu
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Ke Fa
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Sorasak Phanphak
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Daniela Ciumac
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Peter Hollowell
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Kangcheng Shen
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Luke A Clifton
- STFC ISIS Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - Mario Campana
- STFC ISIS Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - John R P Webster
- STFC ISIS Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - Giovanna Fragneto
- Institute of Laue Langevin, 71 Avenue des Martyrs, CS-20156, Grenoble 38042, France
| | - Thomas A Waigh
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Andrew J McBain
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jian Ren Lu
- Biological Physics Laboratory, Department of Physics and Astronomy, Faculty of Science and Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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11
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Tein YS, Zhang Z, Wagner NJ. Competitive Surface Activity of Monoclonal Antibodies and Nonionic Surfactants at the Air-Water Interface Determined by Interfacial Rheology and Neutron Reflectometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:7814-7823. [PMID: 32551695 DOI: 10.1021/acs.langmuir.0c00797] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Interfacial stresses can destabilize therapeutic formulations containing monoclonal antibodies (mAbs), which is proposed to be a result of adsorption and aggregation at the air-water interface. To increase protein stability, pharmaceutical industries add surfactants, such as Polysorbate 20 (PS20), into protein formulations to minimize mAb adsorption at the interface but rarely quantify this process. We determine that mAb adsorption in surfactant-free solutions creates a monolayer with significant viscoelasticity, which can influence measurements of bulk mAb solution viscosity. In contrast, PS20 absorption leads to an interface with negligible interfacial viscosity that protects the air-water interface from mAb adsorption. These studies were performed through a combined study of surface tensiometry, interfacial rheology, capillary viscometry, and neutron reflectometry to determine the surface activity of a model surfactant, PS20, and mAb system, which can be useful for the successful formulation developments of biotherapeutics.
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Affiliation(s)
- Y Summer Tein
- Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Zhenhuan Zhang
- Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Norman J Wagner
- Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
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12
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Recent Advances in Studying Interfacial Adsorption of Bioengineered Monoclonal Antibodies. Molecules 2020; 25:molecules25092047. [PMID: 32353995 PMCID: PMC7249052 DOI: 10.3390/molecules25092047] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/13/2020] [Accepted: 04/23/2020] [Indexed: 11/24/2022] Open
Abstract
Monoclonal antibodies (mAbs) are an important class of biotherapeutics; as of 2020, dozens are commercialized medicines, over a hundred are in clinical trials, and many more are in preclinical developmental stages. Therapeutic mAbs are sequence modified from the wild type IgG isoforms to varying extents and can have different intrinsic structural stability. For chronic treatments in particular, high concentration (≥ 100 mg/mL) aqueous formulations are often preferred for at-home administration with a syringe-based device. MAbs, like any globular protein, are amphiphilic and readily adsorb to interfaces, potentially causing structural deformation and even unfolding. Desorption of structurally perturbed mAbs is often hypothesized to promote aggregation, potentially leading to the formation of subvisible particles and visible precipitates. Since mAbs are exposed to numerous interfaces during biomanufacturing, storage and administration, many studies have examined mAb adsorption to different interfaces under various mitigation strategies. This review examines recent published literature focusing on adsorption of bioengineered mAbs under well-defined solution and surface conditions. The focus of this review is on understanding adsorption features driven by distinct antibody domains and on recent advances in establishing model interfaces suitable for high resolution surface measurements. Our summary highlights the need to further understand the relationship between mAb interfacial adsorption and desorption, solution aggregation, and product instability during fill-finish, transport, storage and administration.
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13
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Kanthe AD, Krause M, Zheng S, Ilott A, Li J, Bu W, Bera MK, Lin B, Maldarelli C, Tu RS. Armoring the Interface with Surfactants to Prevent the Adsorption of Monoclonal Antibodies. ACS APPLIED MATERIALS & INTERFACES 2020; 12:9977-9988. [PMID: 32013386 DOI: 10.1021/acsami.9b21979] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The pharmaceutical industry uses surface-active agents (excipients) in protein drug formulations to prevent the aggregation, denaturation, and unwanted immunological response of therapeutic drugs in solution as well as at the air/water interface. However, the mechanism of adsorption, desorption, and aggregation of proteins at the interface in the presence of excipients remains poorly understood. The objective of this work is to explore the molecular-scale competitive adsorption process between surfactant-based excipients and two monoclonal antibody (mAb) proteins, mAb-1 and mAb-2. We use pendant bubble tensiometry to measure the ensemble average adsorption dynamics of mAbs with and without the excipient. The surface tension measurements allow us to quantify the rate at which the molecules "race" to the interface in single-component and mixed systems. These results define the phase space, where coadsorption of both mAbs and excipients occurs onto the air/water interface. In parallel, we use X-ray reflectivity (XR) measurements to understand the molecular-scale dynamics of competitive adsorption, revealing the surface-adsorbed amounts of the antibody and excipient. XR has revealed that at a sufficiently high surface concentration of the excipient, mAb adsorption to the surface and subsurface domains was inhibited. In addition, despite the fact that both mAbs adsorb via a similar mechanistic pathway and with similar dynamics, a key finding is that the competition for the interface directly correlates with the surface activity of the two mAbs, resulting in a fivefold difference in the concentration of the excipient needed to displace the antibody.
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Affiliation(s)
- Ankit D Kanthe
- Department of Chemical Engineering , The City College of New York , New York , New York 10031 United States
| | - Mary Krause
- Drug Product Science and Technology , Bristol-Myers Squibb , New Brunswick , New Jersey 08901 United States
| | - Songyan Zheng
- Drug Product Science and Technology , Bristol-Myers Squibb , New Brunswick , New Jersey 08901 United States
| | - Andrew Ilott
- Drug Product Science and Technology , Bristol-Myers Squibb , New Brunswick , New Jersey 08901 United States
| | - Jinjiang Li
- Drug Product Science and Technology , Bristol-Myers Squibb , New Brunswick , New Jersey 08901 United States
| | - Wei Bu
- ChemMatCARS, Center for Advanced Radiation Sources , University of Chicago , Chicago , Illinois 60637 United States
| | - Mrinal K Bera
- ChemMatCARS, Center for Advanced Radiation Sources , University of Chicago , Chicago , Illinois 60637 United States
| | - Binhua Lin
- ChemMatCARS, Center for Advanced Radiation Sources , University of Chicago , Chicago , Illinois 60637 United States
| | - Charles Maldarelli
- Department of Chemical Engineering , The City College of New York , New York , New York 10031 United States
- Levich Institute , The City College of New York , New York , New York 10031 United States
| | - Raymond S Tu
- Department of Chemical Engineering , The City College of New York , New York , New York 10031 United States
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14
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Comparison of Polysorbate 80 Hydrolysis and Oxidation on the Aggregation of a Monoclonal Antibody. J Pharm Sci 2020; 109:633-639. [DOI: 10.1016/j.xphs.2019.10.069] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 10/15/2019] [Accepted: 10/28/2019] [Indexed: 11/18/2022]
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15
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Ruane S, Li Z, Campana M, Hu X, Gong H, Webster JRP, Uddin F, Kalonia C, Bishop SM, van der Walle CF, Lu JR. Interfacial Adsorption of a Monoclonal Antibody and Its Fab and Fc Fragments at the Oil/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13543-13552. [PMID: 31510747 DOI: 10.1021/acs.langmuir.9b02317] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The physical stability of a monoclonal antibody (mAb) solution for injection in a prefilled syringe may in part depend on its behavior at the silicone oil/water interface. Here, the adsorption of a mAb (termed COE-3) and its fragment antigen-binding (Fab) and crystallizable (Fc) at the oil/water interface was measured using neutron reflection. A 1.4 ± 0.1 μm hexadecane oil film was formed on a sapphire block by a spin-freeze-thaw process, retaining its integrity upon contact with the protein solutions. Measurements revealed that adsorbed COE-3 and its Fab and Fc fragments retained their globular structure, forming layers that did not penetrate substantially into the oil phase. COE-3 and Fc were found to adsorb flat-on to the interface, with denser 45 and 42 Å inner layers, respectively, in contact with the oil and a more diffuse 17-21 Å outer layer caused by fragments adsorbing in a tilted manner. In contrast, Fab fragments formed a uniform 60 Å monolayer. Monolayers were formed under all conditions studied (10-200 ppm, using three isotopic contrasts), although changes in packing density across the COE-3 and Fc layers were observed. COE-3 had a higher affinity to the interface than either of its constituent fragments, while Fab had a lower interfacial affinity consistent with its higher net surface charge. This study extends the application of high-resolution neutron reflection measurements to the study of protein adsorption at the oil/water interface using an experimental setup mimicking the protein drug product in a siliconized prefilled syringe.
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Affiliation(s)
- Sean Ruane
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL , U.K
| | - Zongyi Li
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL , U.K
| | - Mario Campana
- ISIS Neutron Facility , STFC , Chilton, Didcot OX11 0QZ , U.K
| | - Xuzhi Hu
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL , U.K
| | - Haoning Gong
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL , U.K
| | | | - Faisal Uddin
- Dosage Form Design & Development , AstraZeneca , Granta Park, Cambridge CB21 6GH , U.K
| | - Cavan Kalonia
- Dosage Form Design & Development , AstraZeneca , Gaithersburg , Maryland 20878 , United States
| | - Steven M Bishop
- Dosage Form Design & Development , AstraZeneca , Gaithersburg , Maryland 20878 , United States
| | | | - Jian R Lu
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL , U.K
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16
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Li Z, Pan F, Li R, Pambou E, Hu X, Ruane S, Ciumac D, Li P, Welbourn RJL, Webster JRP, Bishop SM, Narwal R, van der Walle CF, Lu JR. Coadsorption of a Monoclonal Antibody and Nonionic Surfactant at the SiO 2/Water Interface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44257-44266. [PMID: 30500160 DOI: 10.1021/acsami.8b16832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During the formulation of therapeutic monoclonal antibodies (mAbs), nonionic surfactants are commonly added to attenuate structural rearrangement caused by adsorption/desorption at interfaces during processing, shipping, and storage. We examined the adsorption of a mAb (COE-3) at the SiO2/water interface in the presence of pentaethylene glycol monododecyl ether (C12E5), polysorbate 80 (PS80-20EO), and a polysorbate 80 analogue with seven ethoxylates (PS80-7EO). Spectroscopic ellipsometry was used to follow COE-3 dynamic adsorption, and neutron reflection was used to determine interfacial structure and composition. Neither PS80-20EO nor C12E5 had a notable affinity for COE-3 or the interface under the conditions studied and thus did not prevent COE-3 adsorption. In contrast, PS80-7EO did coadsorb but did not influence the dynamic process or the equilibrated amount of absorbed COE-3. Near equilibration, COE-3 underwent structural rearrangement and PS80-7EO started to bind the COE-3 interfacial layer and subsequently formed a well-defined surfactant bilayer via self-assembly. The resultant interfacial layer comprised an inner mAb layer of about 70 Å thickness and an outer surfactant layer of a further 70 Å, with distinct transitional regions across the mAb-surfactant and surfactant-bulk water boundaries. Once formed, such interfacial layers were very robust and worked to prevent further mAb adsorption, desorption, and structural rearrangement. Such robust interfacial layers could be anticipated to exist for formulated mAbs stored in type II glass vials; further research is required to understand the behavior of these layers for siliconized glass syringes.
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Affiliation(s)
- Zongyi Li
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Fang Pan
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Ruiheng Li
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Elias Pambou
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Xuzhi Hu
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Sean Ruane
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Daniela Ciumac
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Peixun Li
- ISIS Neutron Facility , STFC , Chilton , Didcot OX11 0QZ , U.K
| | | | | | - Steven M Bishop
- MedImmune LLC , Gaithersburg , Maryland 20878 , United States
| | | | | | - Jian Ren Lu
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
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17
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Pan F, Li Z, Leyshon T, Rouse D, Li R, Smith C, Campana M, Webster JRP, Bishop SM, Narwal R, van der Walle CF, Warwicker J, Lu JR. Interfacial Adsorption of Monoclonal Antibody COE-3 at the Solid/Water Interface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:1306-1316. [PMID: 29215260 DOI: 10.1021/acsami.7b13332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Spectroscopic ellipsometry (SE) and neutron reflection (NR) data for the adsorption of a monoclonal antibody (mAb, termed COE-3, pI 8.44) at the bare SiO2/water interface are compared here to the simulations based on Derjaguin-Landau-Verwey-Overbeek theory. COE-3 adsorption was characterized by an initial rapid increase in the surface-adsorbed amount (Γ) followed by a plateau. Only the initial rate of the increase in Γ was strongly correlated with the bulk concentration (0.002-0.2 mg/mL), with Γ at the plateau being about 2.2 mg/m2 (pH 5.5). Simulations captured COE-3 adsorption at equilibrium most accurately, the point at which the outgoing flux of molecules within the adsorbed plane matched the adsorption flux. Increasing the buffer pH from 5.5 to 9 increased Γ at equilibrium to ∼3 mg/m2 (0.02 mg/mL COE-3), revealing a dominant role for lateral repulsion between adsorbed mAb molecules. In contrast, increasing the buffer ionic strength (pH 6) reduced Γ, which was captured by simulations accounting for electrostatic screening by ions, in addition to mAb/SiO2 attractive forces and lateral repulsion. NR data at the same bulk concentrations corroborated the SE data, albeit with slightly higher Γ due to longer adsorption times for data acquisition; for example, at pH 9, Γ was 3.6 mg/m2 (0.02 mg/mL COE-3), equivalent to a relatively high volume fraction of 0.5. An adsorbed monolayer with a thickness of 50-52 Å was consistently determined by NR, corresponding to the short axial lengths of fragment antigen-binding and fragment crystallization and implying minimal structural perturbation. Thus, the simulations enabled a mechanistic interpretation of the experimental data of mAb adsorption at the SiO2/water interface.
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Affiliation(s)
- Fang Pan
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Zongyi Li
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Thomas Leyshon
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Dominic Rouse
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Ruiheng Li
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Charles Smith
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Mario Campana
- ISIS Neutron Facility, STFC, Chilton , Didcot OX11 0QZ, U.K
| | | | - Steven M Bishop
- Formulation Sciences, MedImmune LLC , Gaithersburg, Maryland 20878, United States
| | - Rojaramani Narwal
- Formulation Sciences, MedImmune LLC , Gaithersburg, Maryland 20878, United States
| | | | - Jim Warwicker
- School of Chemistry, University of Manchester , Oxford Road, Chemistry Building, Manchester M13 9PL, U.K
| | - Jian Ren Lu
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
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18
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Li Z, Li R, Smith C, Pan F, Campana M, Webster JRP, van der Walle CF, Uddin S, Bishop SM, Narwal R, Warwicker J, Lu JR. Neutron Reflection Study of Surface Adsorption of Fc, Fab, and the Whole mAb. ACS APPLIED MATERIALS & INTERFACES 2017; 9:23202-23211. [PMID: 28613817 DOI: 10.1021/acsami.7b06131] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Characterizing the influence of fragment crystallization (Fc) and antigen-binding fragment (Fab) on monoclonal antibody (mAb) adsorption at the air/water interface is an important step to understanding liquid mAb drug product stability during manufacture, shipping, and storage. Here, neutron reflection is used to study the air/water adsorption of a mAb and its Fc and Fab fragments. By varying the isotopic contrast, the adsorbed amount, thickness, orientation, and immersion of the adsorbed layers could be determined unambiguously. While Fc adsorption reached saturation within the hour, its surface adsorbed amount showed little variation with bulk concentration. In contrast, Fab adsorption was slower and the adsorbed amount was concentration dependent. The much higher Fc adsorption, as compared to Fab, was linked to its lower surface charge. Time and concentration dependence of mAb adsorption was dominated by Fab behavior, although both Fab and Fc behaviors contributed to the amount of mAb adsorbed. Changing the pH from 5.5 to 8.8 did not much perturb the adsorbed amount of Fc, Fab, or mAb. However, a small decrease in adsorption was observed for the Fc over pH 8-8.8 and vice versa for the Fab and mAb, consistent with a dominant Fab behavior. As bulk concentration increased from 5 to 50 ppm, the thicknesses of the Fc layers were almost constant at 40 Å, while Fab and mAb layers increased from 45 to 50 Å. These results imply that the adsorbed mAb, Fc, and Fab all retained their globular structures and were oriented with their short axial lengths perpendicular to the interface.
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Affiliation(s)
- Zongyi Li
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Ruiheng Li
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Charles Smith
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Fang Pan
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Mario Campana
- ISIS Neutron Facility, STFC , Chilton, Didcot OX11 0QZ, United Kingdom
| | - John R P Webster
- ISIS Neutron Facility, STFC , Chilton, Didcot OX11 0QZ, United Kingdom
| | - Christopher F van der Walle
- Formulation Sciences, MedImmune Ltd. , Sir Aaron Klug Building, Granta Park, Cambridge CB21 6GH, United Kingdom
| | - Shahid Uddin
- Formulation Sciences, MedImmune Ltd. , Sir Aaron Klug Building, Granta Park, Cambridge CB21 6GH, United Kingdom
| | - Steve M Bishop
- Formulation Sciences, MedImmune LLC , Gaithersburg, Maryland 20878, United States
| | - Rojaramani Narwal
- Formulation Sciences, MedImmune LLC , Gaithersburg, Maryland 20878, United States
| | - Jim Warwicker
- Manchester Institute of Biotechnology, School of Chemistry, University of Manchester , 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Jian Ren Lu
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, United Kingdom
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