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Panda C, Kumar S, Gupta S, Pandey LM. Structural, kinetic, and thermodynamic aspects of insulin aggregation. Phys Chem Chem Phys 2023; 25:24195-24213. [PMID: 37674360 DOI: 10.1039/d3cp03103a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Given the significance of protein aggregation in proteinopathies and the development of therapeutic protein pharmaceuticals, revamped interest in assessing and modelling the aggregation kinetics has been observed. Quantitative analysis of aggregation includes data of gradual monomeric depletion followed by the formation of subvisible particles. Kinetic and thermodynamic studies are essential to gain key insights into the aggregation process. Despite being the medical marvel in the world of diabetes, insulin suffers from the challenge of aggregation. Physicochemical stresses are experienced by insulin during industrial formulation, storage, delivery, and transport, considerably impacting product quality, efficacy, and effectiveness. The present review briefly describes the pathways, mathematical kinetic models, and thermodynamics of protein misfolding and aggregation. With a specific focus on insulin, further discussions include the structural heterogeneity and modifications of the intermediates incurred during insulin fibrillation. Finally, different model equations to fit the kinetic data of insulin fibrillation are discussed. We believe that this review will shed light on the conditions that induce structural changes in insulin during the lag phase of fibrillation and will motivate scientists to devise strategies to block the initialization of the aggregation cascade. Subsequent abrogation of insulin fibrillation during bioprocessing will ensure stable and globally accessible insulin for efficient management of diabetes.
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Affiliation(s)
- Chinmaya Panda
- Bio-interface & Environmental Engineering Lab Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam, 781039, India.
| | - Sachin Kumar
- Viral Immunology Lab Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam, 781039, India
| | - Sharad Gupta
- Neurodegeneration and Peptide Engineering Research Lab Biological Engineering Discipline, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India
| | - Lalit M Pandey
- Bio-interface & Environmental Engineering Lab Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam, 781039, India.
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2
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Mishra RP, Goel G. Multiscale Model for Quantitative Prediction of Insulin Aggregation Nucleation Kinetics. J Chem Theory Comput 2021; 17:7886-7898. [PMID: 34813303 DOI: 10.1021/acs.jctc.1c00499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We combined kinetic, thermodynamic, and structural information from single-molecule (protein folding) and two-molecule (association) explicit-solvent simulations for determination of kinetic parameters in protein aggregation nucleation with insulin as the model protein. A structural bioinformatics approach was developed to account for heterogeneity of aggregation-prone species, with the transition complex theory found applicable in modeling association kinetics involving non-native species. Specifically, the kinetic pathway for formation of aggregation-prone oligomeric species was found to contain a structurally specific dominant binding mode, making the kinetic process similar to native protein association. The kinetic parameters thus obtained were used in a population balance model, and accurate predictions for aggregation nucleation time varying over 2 orders of magnitude with changes in either insulin concentration or an aggregation-inhibitor ligand concentration were obtained, while an empirical parameter set was not found to be transferable for prediction of ligand effects. Further, this physically determined kinetic parameter set provided several mechanistic insights, such as identification of the rate-limiting step in aggregation nucleation and a quantitative explanation for the switch from Arrhenius to non-Arrhenius aggregation kinetics around the melting temperature of insulin.
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Affiliation(s)
- Rit Pratik Mishra
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, Delhi 110016, India
| | - Gaurav Goel
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, Delhi 110016, India
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3
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Mishra A, Bansal R, Sreenivasan S, Dash R, Joshi S, Singh R, Rathore AS, Goel G. Structure-Based Design of Small Peptide Ligands to Inhibit Early-Stage Protein Aggregation Nucleation. J Chem Inf Model 2020; 60:3304-3314. [DOI: 10.1021/acs.jcim.0c00226] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Avinash Mishra
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Rohit Bansal
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Shravan Sreenivasan
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Rozaleen Dash
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Srishti Joshi
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Richa Singh
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Anurag S. Rathore
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Gaurav Goel
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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4
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Correia C, Tavares E, Lopes C, Silva JG, Duarte A, Geraldes V, Rodrigues MA, Melo EP. Stability of Protein Formulations at Subzero Temperatures by Isochoric Cooling. J Pharm Sci 2020; 109:316-322. [DOI: 10.1016/j.xphs.2019.06.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/28/2019] [Accepted: 06/21/2019] [Indexed: 10/26/2022]
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5
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Kumari A, Somvanshi P, Grover A. Ameliorating amyloid aggregation through osmolytes as a probable therapeutic molecule against Alzheimer's disease and type 2 diabetes. RSC Adv 2020; 10:12166-12182. [PMID: 35497581 PMCID: PMC9050657 DOI: 10.1039/d0ra00429d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 02/16/2020] [Indexed: 01/31/2023] Open
Abstract
Large numbers of neurological and metabolic disorders occurring in humans are induced by the aberrant growth of aggregated or misfolded proteins.
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Affiliation(s)
- Anchala Kumari
- Department of Biotechnology
- Teri School of Advanced Studies
- New Delhi-110070
- India
- School of Biotechnology
| | - Pallavi Somvanshi
- Department of Biotechnology
- Teri School of Advanced Studies
- New Delhi-110070
- India
| | - Abhinav Grover
- School of Biotechnology
- Jawaharlal Nehru University
- New Delhi-110067
- India
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6
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Wang W, Ohtake S. Science and art of protein formulation development. Int J Pharm 2019; 568:118505. [PMID: 31306712 DOI: 10.1016/j.ijpharm.2019.118505] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 07/08/2019] [Accepted: 07/08/2019] [Indexed: 02/07/2023]
Abstract
Protein pharmaceuticals have become a significant class of marketed drug products and are expected to grow steadily over the next decade. Development of a commercial protein product is, however, a rather complex process. A critical step in this process is formulation development, enabling the final product configuration. A number of challenges still exist in the formulation development process. This review is intended to discuss these challenges, to illustrate the basic formulation development processes, and to compare the options and strategies in practical formulation development.
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Affiliation(s)
- Wei Wang
- Biological Development, Bayer USA, LLC, 800 Dwight Way, Berkeley, CA 94710, United States.
| | - Satoshi Ohtake
- Pharmaceutical Research and Development, Pfizer Biotherapeutics Pharmaceutical Sciences, Chesterfield, MO 63017, United States
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7
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Grigolato F, Arosio P. Sensitivity analysis of the variability of amyloid aggregation profiles. Phys Chem Chem Phys 2019; 21:1435-1442. [DOI: 10.1039/c8cp05904g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The variability of amyloid aggregation profiles is linearly proportional to the duration of the aggregation process, and arises from a perturbation of one or more of the initial conditions.
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Affiliation(s)
- Fulvio Grigolato
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology Zurich
- Zurich
- Switzerland
| | - Paolo Arosio
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology Zurich
- Zurich
- Switzerland
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8
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Multiphasic effect of vinyl pyrrolidone polymers on amyloidogenesis, from macromolecular crowding to inhibition. Biochem J 2018; 475:3417-3436. [DOI: 10.1042/bcj20180715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/02/2018] [Accepted: 10/04/2018] [Indexed: 11/17/2022]
Abstract
Deposition of misfolded amyloid polypeptides, associated with cell death, is the hallmark of many degenerative diseases (e.g. type II diabetes mellitus and Alzheimer's disease). In vivo, cellular and extracellular spaces are occupied by a high volume fraction of macromolecules. The resulting macromolecular crowding energetically affects reactions. Amyloidogenesis can either be promoted by macromolecular crowding through the excluded volume effect or inhibited due to a viscosity increase reducing kinetics. Macromolecular crowding can be mimicked in vitro by the addition of non-specific polymers, e.g. Ficoll, dextran and polyvinyl pyrrolidone (PVP), the latter being rarely used to study amyloid systems. We investigated the effect of PVP on amyloidogenesis of full-length human islet amyloid polypeptide (involved in type II diabetes) using fibrillisation and surface activity assays, ELISA, immunoblot and microscale thermophoresis. We demonstrate that high molecular mass PVP360 promotes amyloidogenesis due to volume exclusion and increase in effective amyloidogenic monomer concentration, like other crowders, but without the confounding effects of viscosity and surface activity. Interestingly, we also show that low molecular mass PVP10 has unique inhibitory properties as inhibition of fibril elongation occurs mainly in the bulk solution and is due to PVP10 directly and strongly interacting with amyloid species rather than the increase in viscosity typically associated with macromolecular crowding. In vivo, amyloidogenesis might be affected by the properties and proximity of endogenous macromolecular crowders, which could contribute to changes in associated pathogenesis. More generally, the PVP10 molecular backbone could be used to design small compounds as potential inhibitors of toxic species formation.
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9
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Wang W, Roberts CJ. Protein aggregation – Mechanisms, detection, and control. Int J Pharm 2018; 550:251-268. [DOI: 10.1016/j.ijpharm.2018.08.043] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 12/19/2022]
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10
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Abstract
Up to 40% of intracellular water is confined due to the dense packing of macromolecules, ions, and osmolytes. Despite the large body of work concerning the effect of additives on the biomolecular structure and stability, the role of crowding and heterogeneity in these interactions is not well understood. Here, infrared spectroscopy and molecular dynamics simulations are used to describe the mechanisms by which crowding modulates hydrogen bonding interactions between water and dimethyl sulfoxide (DMSO). Specifically, we use formamide and dimethylformamide (DMF) as molecular crowders and show that the S═O hydrogen bond populations in aqueous mixtures are increased by both amides. These additives increase the amount of water within the DMSO first solvation shell through two mechanisms: (a) directly stabilizing water-DMSO hydrogen bonds; (b) increasing water exposure by destabilizing DMSO-DMSO self-interactions. Further, we quantified the hydrogen bond enthalpies between the different components: DMSO-water (61 kJ/mol) > DMSO-formamide (32 kJ/mol) > water-water (23 kJ/mol) ≫ formamide-water (4.7 kJ/mol). Spectra of carbonyl stretching vibrations show that DMSO induces the dehydration of amides as a result of strong DMSO-water interactions, which has been suggested as the main mechanism of protein destabilization.
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Affiliation(s)
- Kwang-Im Oh
- Department of Chemistry , University of Texas at Austin , 105 E 24th St. Stop A5300 , Austin , TX 78712 , United States
| | - Carlos R Baiz
- Department of Chemistry , University of Texas at Austin , 105 E 24th St. Stop A5300 , Austin , TX 78712 , United States
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11
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Schwinefus JJ, Baka NL, Modi K, Billmeyer KN, Lu S, Haase LR, Menssen RJ. l-Proline and RNA Duplex m-Value Temperature Dependence. J Phys Chem B 2017; 121:7247-7255. [PMID: 28737394 DOI: 10.1021/acs.jpcb.7b03608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The temperature dependence of l-proline interactions with the RNA dodecamer duplex surface exposed after unfolding was quantified using thermal and isothermal titration denaturation monitored by uv-absorbance. The m-value quantifying proline interactions with the RNA duplex surface area exposed after unfolding was measured using RNA duplexes with GC content ranging between 17 and 83%. The m-values from thermal denaturation decreased with increasing GC content signifying increasingly favorable proline interactions with the exposed RNA surface area. However, m-values from isothermal titration denaturation at 25.0 °C were independent of GC content and less negative than those from thermal denaturation. The m-value from isothermal titration denaturation for a 50% GC RNA duplex decreased (became more negative) as the temperature increased and was in nearly exact agreement with the m-value from thermal denaturation. Since RNA duplex transition temperatures increased with GC content, the more favorable proline interactions with the high GC content duplex surface area observed from thermal denaturation resulted from the temperature dependence of proline interactions rather than the RNA surface chemical composition. The enthalpy contribution to the m-value was positive and small (indicating a slight increase in duplex unfolding enthalpy with proline) while the entropic contribution to the m-value was positive and increased with temperature. Our results will facilitate proline's use as a probe of solvent accessible surface area changes during biochemical reactions at different reaction temperatures.
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Affiliation(s)
- Jeffrey J Schwinefus
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
| | - Nadia L Baka
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
| | - Kalpit Modi
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
| | - Kaylyn N Billmeyer
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
| | - Shutian Lu
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
| | - Lucas R Haase
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
| | - Ryan J Menssen
- Department of Chemistry, St. Olaf College , Northfield, Minnesota 55057, United States
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12
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13
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Ratha BN, Ghosh A, Brender JR, Gayen N, Ilyas H, Neeraja C, Das KP, Mandal AK, Bhunia A. Inhibition of Insulin Amyloid Fibrillation by a Novel Amphipathic Heptapeptide: MECHANISTIC DETAILS STUDIED BY SPECTROSCOPY IN COMBINATION WITH MICROSCOPY. J Biol Chem 2016; 291:23545-23556. [PMID: 27679488 PMCID: PMC5095409 DOI: 10.1074/jbc.m116.742460] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 09/24/2016] [Indexed: 02/02/2023] Open
Abstract
The aggregation of insulin into amyloid fibers has been a limiting factor in the development of fast acting insulin analogues, creating a demand for excipients that limit aggregation. Despite the potential demand, inhibitors specifically targeting insulin have been few in number. Here we report a non-toxic and serum stable-designed heptapeptide, KR7 (KPWWPRR-NH2), that differs significantly from the primarily hydrophobic sequences that have been previously used to interfere with insulin amyloid fibrillation. Thioflavin T fluorescence assays, circular dichroism spectroscopy, and one-dimensional proton NMR experiments suggest KR7 primarily targets the fiber elongation step with little effect on the early oligomerization steps in the lag time period. From confocal fluorescence and atomic force microscopy experiments, the net result appears to be the arrest of aggregation in an early, non-fibrillar aggregation stage. This mechanism is noticeably different from previous peptide-based inhibitors, which have primarily shifted the lag time with little effect on later stages of aggregation. As insulin is an important model system for understanding protein aggregation, the new peptide may be an important tool for understanding peptide-based inhibition of amyloid formation.
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Affiliation(s)
| | | | - Jeffrey R Brender
- Radiation Biology Branch, National Institutes of Health, Bethesda, Maryland 20814
| | - Nilanjan Gayen
- Department of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | | | - Chilukoti Neeraja
- TIFR Centre for Interdisciplinary Sciences (TCIS), Narsingi, Hyderabad 500075, India, and
| | - Kali P Das
- Department of Chemistry, 93/1 APC Road, Bose Institute, Kolkata 700009, India
| | - Atin K Mandal
- Department of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
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14
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Fonin AV, Uversky VN, Kuznetsova IM, Turoverov KK. Protein folding and stability in the presence of osmolytes. Biophysics (Nagoya-shi) 2016. [DOI: 10.1134/s0006350916020056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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15
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Inayathullah M, Rajadas J. Conformational dynamics of a hydrophobic prion fragment (113-127) in different pH and osmolyte solutions. Neuropeptides 2016; 57:9-14. [PMID: 26919915 DOI: 10.1016/j.npep.2016.02.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 02/09/2016] [Accepted: 02/14/2016] [Indexed: 01/17/2023]
Abstract
Prion diseases are characterized by a conformational change in prion protein from its native state into beta-sheet rich aggregates that are neurotoxic. The central domain that contain a highly conserved hydrophobic region of the protein play an important role in the toxicity. The conformation of the proteins is largely influenced by various solvent environments. Here we report results of study of hydrophobic prion fragment peptide PrP(113-127) under different pH and osmolytes solution conditions. The secondary structure and the folding of PrP(113-127) was determined using circular dichroism and fluorescence spectroscopic methods. The results indicate that PrP(113-127) adopts a random coil conformation in aqueous buffer at neutral pH and that converted into beta sheet on aging. Even though the initial random coil conformation was similar in different pH conditions, the acidic as well as basic pH conditions delays the conformational transition to beta sheet. FRET results indicate that the distance between N and C-terminal regions increased on aging due to unfolding by self-assembly of the peptide into an organized beta sheet structure. Presence of osmolytes, prevented or decelerated the aggregation process of PrP(113-127) peptide.
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Affiliation(s)
- Mohammed Inayathullah
- Biomaterials and Advanced Drug Delivery Laboratory, School of Medicine, Stanford University, Palo Alto, CA 94304, USA; Bioorganic and Neurochemistry Laboratory, Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India; Cardiovascular Pharmacology Division, Cardiovascular Institute, School of Medicine, Stanford University, Stanford, CA 94305, USA
| | - Jayakumar Rajadas
- Biomaterials and Advanced Drug Delivery Laboratory, School of Medicine, Stanford University, Palo Alto, CA 94304, USA; Cardiovascular Pharmacology Division, Cardiovascular Institute, School of Medicine, Stanford University, Stanford, CA 94305, USA.
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16
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Frka-Petesic B, Zanchi D, Martin N, Carayon S, Huille S, Tribet C. Aggregation of Antibody Drug Conjugates at Room Temperature: SAXS and Light Scattering Evidence for Colloidal Instability of a Specific Subpopulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4848-4861. [PMID: 27129612 DOI: 10.1021/acs.langmuir.6b00653] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Coupling a hydrophobic drug onto monoclonal antibodies via lysine residues is a common route to prepare antibody-drug conjugates (ADC), a promising class of biotherapeutics. But a few chemical modifications on protein surface often increase aggregation propensity, without a clear understanding of the aggregation mechanisms at stake (loss of colloidal stability, self-assemblies, denaturation, etc.), and the statistical nature of conjugation introduces polydispersity in the ADC population, which raises questions on whether the whole ADC population becomes unstable. To characterize the average interactions between ADC, we monitored small-angle X-ray scattering in solutions of monoclonal IgG1 human antibody drug conjugate, with average degree of conjugation of 0, 2, or 3 drug molecules per protein. To characterize stability, we studied the kinetics of aggregation at room temperature. The intrinsic Fuchs stability ratio of the ADC was estimated from the variation over time of scattered light intensity and hydrodynamic radius, in buffers of varying pH, and at diverse sucrose (0% or 10%) and NaCl (0 or 100 mM) concentrations. We show that stable ADC stock solutions became unstable upon pH shift, well below the pH of maximum average attraction between IgGs. Data indicate that aggregation can be ascribed to a fraction of ADC population usually representing less than 30 mol % of the sample. In contrast to the case of (monodisperse) monoclonal antibodies, our results suggest that a poor correlation between stability and average interaction parameters should be expected as a corollary of dispersity of ADC conjugation. In practice, the most unstable fraction of the ADC population can be removed by filtration, which affects remarkably the apparent stability of the samples. Finally, the lack of correlation between the kinetic stability and variations of the average inter-ADC interactions is tentatively attributed to the uneven nature of charge distributions and the presence of patches on the drug-modified antibodies.
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Affiliation(s)
- B Frka-Petesic
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
| | - D Zanchi
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
- Université Paris Diderot-Paris 7, 5 rue Thomas Mann, 75013 Paris, France
| | - N Martin
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
| | - S Carayon
- SANOFI R&D, Analytics & Formulation Department, Global Biologics , 13 quai Jules Guesde - BP 14, 94403 Vitry-sur-Seine, France
| | - S Huille
- SANOFI R&D, Analytics & Formulation Department, Global Biologics , 13 quai Jules Guesde - BP 14, 94403 Vitry-sur-Seine, France
| | - C Tribet
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
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17
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Zheng Z, Jing B, Sorci M, Belfort G, Zhu Y. Accelerated insulin aggregation under alternating current electric fields: Relevance to amyloid kinetics. BIOMICROFLUIDICS 2015; 9:044123. [PMID: 26339322 PMCID: PMC4552700 DOI: 10.1063/1.4928767] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 08/07/2015] [Indexed: 06/05/2023]
Abstract
The time-dependent nucleation phase is critical to amyloid fibrillation and related to many pathologies, in which the conversion from natively folded amyloidogenic proteins to oligomers via nucleation is often hypothesized as a possible underlying mechanism. In this work, non-uniform AC-electric fields across two asymmetric electrodes were explored to control and examine the aggregation of insulin, a model amyloid protein, in aqueous buffer solution at constant temperature (20 °C) by fluorescence correlation spectroscopy and fluorescence microscopy. Insulin was rapidly concentrated in a strong AC-field by imposed AC-electroosmosis flow over an optimal frequency range of 0.5-2 kHz. In the presence of an AC-field, direct fibrillation from insulin monomers without the formation of oligomer precursors was observed. Once the insulin concentration had nearly doubled its initial concentration, insulin aggregates were observed in solution. The measured lag time for the onset of insulin aggregation, determined from the abrupt reduction in insulin concentration in solution, was significantly shortened from months or years in the absence of AC-fields to 1 min-3 h under AC-fields. The ability of external fields to alter amyloid nucleation kinetics provides insights into the onset of amyloid fibrillation.
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Affiliation(s)
- Zhongli Zheng
- Department of Chemical and Biomolecular Engineering, University of Notre Dame , Notre Dame, Indiana 46556, USA
| | - Benxin Jing
- Department of Chemical and Biomolecular Engineering, University of Notre Dame , Notre Dame, Indiana 46556, USA
| | - Mirco Sorci
- Howard P. Isermann Department of Chemical and Biological Engineering and The Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , Troy, New York 12180, USA
| | - Georges Belfort
- Howard P. Isermann Department of Chemical and Biological Engineering and The Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , Troy, New York 12180, USA
| | - Yingxi Zhu
- Department of Chemical and Biomolecular Engineering, University of Notre Dame , Notre Dame, Indiana 46556, USA
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