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Radomska K, Lebelt L, Wolszczak M. Aggregation of Albumins under Reductive Radical Stress. Int J Mol Sci 2024; 25:9009. [PMID: 39201695 PMCID: PMC11354859 DOI: 10.3390/ijms25169009] [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: 07/05/2024] [Revised: 08/08/2024] [Accepted: 08/15/2024] [Indexed: 09/03/2024] Open
Abstract
The reactions of radicals with human serum albumin (HSA) under reductive stress conditions were studied using pulse radiolysis and photochemical methods. It was proved that irradiation of HSA solutions under reductive stress conditions results in the formation of stable protein aggregates. HSA aggregates induced by ionizing radiation are characterized by unique emission, different from the UV emission of non-irradiated solutions. The comparison of transient absorption spectra and the reactivity of hydrated electrons (eaq-) with amino acids or HSA suggests that electron attachment to disulfide bonds is responsible for the transient spectrum recorded in the case of albumin solutions. The reactions of eaq- and CO2•- with HSA lead to the formation of the same products. Recombination of sulfur-centered radicals plays a crucial role in the generation of HSA nanoparticles, which are stabilized by intermolecular disulfide bonds. The process of creating disulfide bridges under the influence of ionizing radiation is a promising method for the synthesis of biocompatible protein nanostructures for medical applications. Our Raman spectroscopy studies indicate strong modification of disulfide bonds and confirm the aggregation of albumins as well. Low-temperature measurements indicate the possibility of electron tunneling through the HSA protein structure to specific CyS-SCy bridges. The current study showed that the efficiency of HSA aggregation depends on two main factors: dose rate (number of pulses per unit time in the case of pulse radiolysis) and the temperature of the irradiated solution.
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Affiliation(s)
- Karolina Radomska
- Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, 93-590 Lodz, Poland;
- Centre of Papermaking and Printing, Lodz University of Technology, Wolczanska 221, 93-005 Lodz, Poland
| | - Liwia Lebelt
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland;
| | - Marian Wolszczak
- Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, 93-590 Lodz, Poland;
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2
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Mardikasari SA, Katona G, Sipos B, Ambrus R, Csóka I. Preparation and Optimization of Bovine Serum Albumin Nanoparticles as a Promising Gelling System for Enhanced Nasal Drug Administration. Gels 2023; 9:896. [PMID: 37998986 PMCID: PMC10670644 DOI: 10.3390/gels9110896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/10/2023] [Accepted: 11/11/2023] [Indexed: 11/25/2023] Open
Abstract
Bovine serum albumin (BSA) has been used extensively as a suitable carrier system for alternative drug delivery routes, such as nasal administration. However, the optimization of BSA nanoparticles with respect to their nasal applicability has not been widely studied. The present study focuses on the characterization of BSA nanoparticles prepared using the desolvation method, followed by a gelation process to facilitate intranasal drug delivery. The results demonstrated that the ratio of BSA and the desolvating agent, ethanol, played a critical role in the nanoparticle characteristics of the BSA nanogel matrices (BSA-NGs). Based on the gelling properties, the formulations of BSA-NG 2, BSA-NG 4, and BSA-NG 6 were selected for further investigation. The Raman spectra confirmed that there were no specific changes to the secondary structures of the BSA. The mucoadhesion studies revealed moderately high mucoadhesive properties, with a mucin binding efficiency (MBE) value of around 67%, allowing the dose to avoid elimination due to rapid mucociliary clearance of the nasal passage. Via studying the nexus of the carrier system, BSA-NGs loaded with dexamethasone as a model drug were prepared and evaluated by differential scanning calorimetry (DSC) and thermal gravimetry (TG), ascertaining that no ethanol remained in the samples after the freeze-drying process. Furthermore, the viscosity measurements exhibited moderate viscosity, which is suitable for nasal liquid preparations. The in vitro release studies performed with a simulated nasal electrolyte solution (SNES) medium showed 88.15-95.47% drug release within 4 h. In conclusion, BSA nanoparticle gelling matrices can offer potential, value-added drug delivery carriers for improved nasal drug administration.
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Affiliation(s)
- Sandra Aulia Mardikasari
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, H-6720 Szeged, Hungary; (S.A.M.); (B.S.); (R.A.); (I.C.)
- Faculty of Pharmacy, Hasanuddin University, Makassar 90245, Indonesia
| | - Gábor Katona
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, H-6720 Szeged, Hungary; (S.A.M.); (B.S.); (R.A.); (I.C.)
| | - Bence Sipos
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, H-6720 Szeged, Hungary; (S.A.M.); (B.S.); (R.A.); (I.C.)
| | - Rita Ambrus
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, H-6720 Szeged, Hungary; (S.A.M.); (B.S.); (R.A.); (I.C.)
| | - Ildikó Csóka
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, H-6720 Szeged, Hungary; (S.A.M.); (B.S.); (R.A.); (I.C.)
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3
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Hauptmann A, Hoelzl G, Mueller M, Bechtold-Peters K, Loerting T. Raman Marker Bands for Secondary Structure Changes of Frozen Therapeutic Monoclonal Antibody Formulations During Thawing. J Pharm Sci 2023; 112:51-60. [PMID: 36279956 DOI: 10.1016/j.xphs.2022.10.015] [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: 08/21/2022] [Revised: 10/16/2022] [Accepted: 10/16/2022] [Indexed: 11/06/2022]
Abstract
In this work we use Raman spectroscopy for protein characterization in the frozen state. We investigate the behavior of frozen therapeutic monoclonal antibody IgG1 formulation upon thawing by Raman spectroscopy. Secondary and tertiary structure of the protein in three different mab formulations in the frozen state are followed through observation of marker bands for α-helix, β-sheet and random coil. We identify the tyrosine intensity ratio I856/I830 as a marker for mab aggregation. Upon fast cooling (40 °C/min) to -80 °C we observe a significant increase of random coil and α -helical structures, while this is not the case for slower cooling (20 °C/min) to -80 °C. Most changes in the protein's secondary structure are observed in the course of thawing in the range up to -20 °C, when passing through the glass transitions and cold-crystallization of the two types of freeze-concentrated solutions formed through macro- and microcryoconcentration. An increase of protein concentration and the addition of mannitol suppress secondary structural changes but do no impact on aggregation.
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Affiliation(s)
| | | | | | | | - Thomas Loerting
- Institute of Physical Chemistry, University Innsbruck, Innsbruck, Austria.
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4
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Katona G, Sipos B, Csóka I. Risk-Assessment-Based Optimization Favours the Development of Albumin Nanoparticles with Proper Characteristics Prior to Drug Loading. Pharmaceutics 2022; 14:pharmaceutics14102036. [PMID: 36297472 PMCID: PMC9611155 DOI: 10.3390/pharmaceutics14102036] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/06/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Albumin nanocarrier research and development is a challenging area in the field of personalized medicine and in providing advanced therapeutic solutions. Albumin as a biocompatible, nonimmunogenic, and non-toxic protein carrier that can be exploited to conjugate drugs with poor bioavailability to improve on this feature. With many different perspectives and desired target profiles, a systematic structural approach must be used in nanoparticle development. The extended Research and Development (R&D) Quality by Design thinking and methodology proved to be useful in case of specific nanoparticle development processes before. However, the coacervation method is the most frequently applied preparation method for HSA nanoparticles; there is a lack of existing research work which has directly determined the influence of process parameters, control strategy, or design space. With a quality-management-driven strategy, a knowledge space was developed for these versatile nanoparticles and an initial risk assessment was conducted on the quality-affecting factors regarding the coacervation method, followed by an optimization process via Plackett–Burman and Box–Behnken experimental design. As a result of screening the effect of process variables on the fabrication of HSA nanoparticles, an optimized colloidal drug delivery system was engineered with desired nanoparticulate properties.
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Aguilera-Garrido A, del Castillo-Santaella T, Yang Y, Galisteo-González F, Gálvez-Ruiz MJ, Molina-Bolívar JA, Holgado-Terriza JA, Cabrerizo-Vílchez MÁ, Maldonado-Valderrama J. Applications of serum albumins in delivery systems: Differences in interfacial behaviour and interacting abilities with polysaccharides. Adv Colloid Interface Sci 2021; 290:102365. [PMID: 33667972 DOI: 10.1016/j.cis.2021.102365] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/13/2021] [Accepted: 01/13/2021] [Indexed: 12/17/2022]
Abstract
One of the major applications of Serum Albumins is their use as delivery systems for lipophilic compounds in biomedicine. Their biomedical application is based on the similarity with Human Serum Albumin (HSA), as a fully biocompatible protein. In general, Bovine Serum Albumin (BSA) is treated as comparable to its human homologue and used as a model protein for fundamental studies since it is available in high amounts and well understood. This protein can act as a carrier for lipophilic compounds or as protective shell in an emulsion-based vehicle. Polysaccharides are generally included in these formulations in order to increase the stability and/or applicability of the carrier. In this review, the main biomedical applications of Albumins as drug delivery systems are first presented. Secondly, the differences between BSA and HSA are highlighted, exploring the similarities and differences between these proteins and their interaction with polysaccharides, both in solution and adsorbed at interfaces. Finally, the use of Albumins as emulsifiers for emulsion-based delivery systems, concretely as Liquid Lipid Nanocapsules (LLNs), is revised and discussed in terms of the differences encountered in the molecular structure and in the interfacial properties. The specific case of Hyaluronic Acid is considered as a promising additive with important applications in biomedicine. The literature works are thoroughly discussed highlighting similarities and differences between BSA and HSA and their interaction with polysaccharides encountered at different structural levels, hence providing routes to control the optimal design of delivery systems.
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6
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Hall F, Liceaga A. Effect of microwave-assisted enzymatic hydrolysis of cricket (Gryllodes sigillatus) protein on ACE and DPP-IV inhibition and tropomyosin-IgG binding. J Funct Foods 2020. [DOI: 10.1016/j.jff.2019.103634] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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7
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Humeres E, Canle M, Lopes CN, Santaballa JA, Debacher NA, Moreira RDFPM, Safin V, Pérez MIF. Photo-immobilization of proteins on carbons. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2020; 202:111675. [PMID: 31733612 DOI: 10.1016/j.jphotobiol.2019.111675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 10/16/2019] [Accepted: 10/26/2019] [Indexed: 06/10/2023]
Abstract
The photofunctionalization of three different carbons with two proteins was studied at room temperature. Water solutions of bovine serum albumin, BSA, and α-amylase, AA, were photolyzed at 21 °C in the presence of graphite microparticles (6.20 μm), MPG, graphene oxide, MPGO, and graphene oxide modified with SO2, mMPGO. The insertion of BSA on carbon matrixes occurred with a deoxygenation reaction, most likely due to a dehydration step of a water molecule. XPS, TOC and TGA, showed that the BSA photo-insertion on MPG was highly efficient with 34.9% of the weight of MPG after photolysis, with an initial concentration of 1 g∙L-1 of BSA. A high yield of AA photoinsertion on the carbons was also obtained. The calculated weight of AA inserted on MPG and MPGO after photolysis was 22.30% and 18.08%, respectively, with respect to the initial weight of carbon, when the initial concentration of AA was 60 mg∙L-1. AA immobilized on MPG was active while the enzyme on MPGO showed a smaller activity, within the experimental error. Although a certain extent of denaturalization of both proteins was observed during photolysis, the molecular weight and composition changed very little during the photolysis, which would produce mainly conformational changes and isomerization reactions.
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Affiliation(s)
- Eduardo Humeres
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
| | - Moisés Canle
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade (React!), Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain
| | - Cristiane Nunes Lopes
- Departamento de Engenharia Química e de Alimentos, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - J Arturo Santaballa
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade (React!), Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain
| | - Nito Angelo Debacher
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Regina de F P M Moreira
- Departamento de Engenharia Química e de Alimentos, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Vladimir Safin
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade (React!), Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain; Department of Chemistry and Technology of Natural Energy Carriers and Carbon Materials, Siberian Federal University, Russia
| | - M Isabel Fernández Pérez
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade (React!), Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain
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8
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Dang TT, Feyissa AH, Gringer N, Jessen F, Olsen K, Bøknæs N, Orlien V. Effects of high pressure and ohmic heating on shell loosening, thermal and structural properties of shrimp (Pandalus borealis). INNOV FOOD SCI EMERG 2020. [DOI: 10.1016/j.ifset.2019.102246] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Formation and Stabilization of Gold Nanoparticles in Bovine Serum Albumin Solution. Molecules 2019; 24:molecules24183395. [PMID: 31540504 PMCID: PMC6766809 DOI: 10.3390/molecules24183395] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/13/2019] [Accepted: 09/17/2019] [Indexed: 01/28/2023] Open
Abstract
The formation and growth of gold nanoparticles (AuNPs) were investigated in pH 7 buffer solution of bovine serum albumin (BSA) at room temperature. The processes were monitored by UV-Vis, circular dichroism, Raman and electron paramagnetic resonance (EPR) spectroscopies. TEM microscopy and dynamic light scattering (DLS) measurements were used to evidence changes in particle size during nanoparticle formation and growth. The formation of AuNPs at pH 7 in the absence of BSA was not observed, which proves that the albumin is involved in the first step of Au(III) reduction. Changes in the EPR spectral features of two spin probes, CAT16 and DIS3, with affinity for BSA and AuNPs, respectively, allowed us to monitor the particle growth and to demonstrate the protective role of BSA for AuNPs. The size of AuNPs formed in BSA solution increases slowly with time, resulting in nanoparticles of different morphologies, as revealed by TEM. Raman spectra of BSA indicate the interaction of albumin with AuNPs through sulfur-containing amino acid residues. This study shows that albumins act as both reducing agents and protective corona of AuNPs.
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10
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Humeres E, de Souza EP, Debacher NA, Lopes CN, Moreira RDF, Santaballa JA, Canle L. M. Effect of mass of pristine carbon nanotubes on the photolysis of phenylalanine. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.3849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Eduardo Humeres
- Departamento de Química; Universidade Federal de Santa Catarina; Florianópolis SC Brazil
| | | | - Nito Angelo Debacher
- Departamento de Química; Universidade Federal de Santa Catarina; Florianópolis SC Brazil
| | - Cristiane Nunes Lopes
- Departamento de Química; Universidade Federal de Santa Catarina; Florianópolis SC Brazil
| | - Regina de F.P.M. Moreira
- Departamento de Engenharia Química e Engenharia de Alimentos; Universidade Federal de Santa Catarina; Florianópolis SC Brazil
| | - J. Arturo Santaballa
- Facultade de Ciencias and CICA, Grupo Reactividad Química e Fotorreactividade; Universidade da Coruña; A Coruña Spain
| | - Moisés Canle L.
- Facultade de Ciencias and CICA, Grupo Reactividad Química e Fotorreactividade; Universidade da Coruña; A Coruña Spain
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11
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Hildebrand N, Wei G, Köppen S, Colombi Ciacchi L. Simulated and experimental force spectroscopy of lysozyme on silica. Phys Chem Chem Phys 2018; 20:19595-19605. [PMID: 30009290 DOI: 10.1039/c8cp03747g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The force spectra of proteins detaching from oxide surfaces measured by atomic force microscopy (AFM) often present complex patterns of peaks, which are difficult to correlate with individual bond-breaking events at the atomic scale. In this work we rationalize experimental AFM force spectra of hen-egg-white lysozyme detaching from silica by means of all-atom steered molecular dynamics (SMD) simulations. In particular, we demonstrate that the native tertiary structure of lysozyme is preserved if, and only if, its four intramolecular disulfide bridges are intact. Otherwise, the protein pulled off the surface undergoes severe unfolding, which is well captured by SMD simulations in explicit solvent. Implicit solvent simulations, on the contrary, wrongly predict protein unfolding even in the presence of S-S bridges, due to the lack of additional structural stabilization provided by the water's hydrogen-bond network within and surrounding the protein. On the basis of our combined experimental and theoretical findings, we infer that the rugged force spectra characteristic of lysozyme/silica interfaces are not due to the successive breaking of internal disulfide bonds leading to partial unfolding events. Rather, they reflect the detachment of several molecules bound to the same AFM tip, each anchored to the surface via multiple hydrogen and ionic bonds.
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Affiliation(s)
- Nils Hildebrand
- Hybrid Materials Interfaces Group, Faculty Production Engineering, Bremen Center for Computational Materials Science, University of Bremen, Am Fallturm 1, 28359 Bremen, Germany.
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12
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Wu D, Zhang S, Zhao Y, Ao N, Ramakrishna S, He L. The effects of motif net charge and amphiphilicity on the self-assembly of functionally designer RADA16-I peptides. ACTA ACUST UNITED AC 2018; 13:035011. [PMID: 29546848 DOI: 10.1088/1748-605x/aab2fd] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
RADA16-I (Ac-(RADA)4-CONH2) is a widely investigated self-assembling peptide (SAP) in the biomedical field. It can undergo ordered self-assembly to form stable secondary structures, thereby further forming a nanofiber hydrogel. The modification of RADA16-I with functional peptide motifs has become a popular research topic. Researchers aim to exhibit particular biomedical signaling, and subsequently, further expand its applications. However, only a few fundamental reports are available on the influences of the peptide motifs on self-assembly mechanisms of designer functional RADA16-I SAPs. In this study, we designed RGD-modified RADA16-I SAPs with a series of net charges and amphiphilicities. The assembly/reassembly of these functionally designer SAPs was thoroughly studied using Raman spectroscopy, CD spectroscopy, and AFM. The nanofiber morphology and the secondary structure largely depended on the balance between the hydrophobic effects versus like-charge repulsions of the motifs, which should be to the focus in order to achieve a tailored nanostructure. Our study would contribute insight into considerations for sophisticated design of SAPs for biomedical applications.
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Affiliation(s)
- Dongni Wu
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, People's Republic of China. MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou 510632, People's Republic of China
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13
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Peralta Muniz Moreira RDF, Humeres E, Berger C, Isabel Fernández M, Santaballa JA, Canle M. Photolytic insertion of albumin on activated carbon modified with ozone. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2017; 174:261-268. [PMID: 28806682 DOI: 10.1016/j.jphotobiol.2017.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/25/2017] [Accepted: 08/01/2017] [Indexed: 06/07/2023]
Abstract
254nm photolyses of bovine serum albumin [BSA] in aqueous solutions, were carried out in the presence of activated carbons modified by reaction with ozone. The photolyses were monitored by fluorescence spectroscopy and UV spectrophotometry, and the products were characterized by elemental analysis, FTIR, TGA, total organic carbon analyses [TOC], and XPS. The ozonation reaction was carried out at room temperature with O3 under dry and wet conditions. The carbon characterization showed that the reaction increased the amount of epoxide and carbonyl groups on the carbon matrix. The activated carbon modified with dry O3 exhibited higher concentration of oxidized groups in its surface, smaller surface area and lower thermal stability. Characterization of the photolysis of ozonized carbons pointed to a small release of carbon organic groups during the reaction with elimination of epoxide groups and increase of carbonyl groups without change of thermal stability. Photolysis of BSA in aqueous solution occurred with fluorescence quenching due to changes of the local microenvironment and/or macromolecular conformational changes. Absorbance increase of the UV spectrum indicated a hyperchromic effect due to albumin structure modifications during photolysis. TGA analysis of the photolysed activated carbons in the presence of BSA suggested that ozonized carbon samples underwent insertion of BSA upon photolysis, in particular the sample ozonized under dry conditions. The changes observed for the FTIR and elemental analysis agreed with this conclusion, which was further supported by 13C SS-NMR, fluorescence emission and XPS.
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Affiliation(s)
| | - Eduardo Humeres
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Carolina Berger
- Departamento de Engenharia Química e Engenharia de Alimentos, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - M Isabel Fernández
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade, Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain
| | - J A Santaballa
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade, Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain
| | - Moisés Canle
- Universidade da Coruña, Grupo Reactividade Química e Fotorreactividade, Departamento de Química, Facultade de Ciencias & CICA, E-15071 A Coruña, Spain.
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14
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Voicescu M, Ionescu S, Nistor CL. Spectroscopic study of 3-Hydroxyflavone - protein interaction in lipidic bi-layers immobilized on silver nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 170:1-8. [PMID: 27380623 DOI: 10.1016/j.saa.2016.06.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 06/06/2016] [Accepted: 06/26/2016] [Indexed: 06/06/2023]
Abstract
The interaction of 3-Hydroxyflavone with serum proteins (BSA and HSA) in lecithin lipidic bi-layers (PC) immobilized on silver nanoparticles (SNPs), was studied by fluorescence and Raman spectroscopy. BSA secondary structure was quantified with a deconvolution algorithm, showing a decrease in α-helix structure when lipids were added to the solution. The effect of temperature on the rate of the excited-state intra-molecular proton transfer and on the dual fluorescence emission of 3-HF in the HSA/PC/SNPs systems was discussed. Evaluation of the antioxidant activity of 3-HF in HSA/PC/SNPs systems was also studied. The antioxidant activity of 3-HF decreased in the presence of SNPs. The results are discussed with relevance to the secondary structure of proteins and of the 3-HF based nano-systems to a topical formulation useful in the oxidative stress process.
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Affiliation(s)
- Mariana Voicescu
- Romanian Academy, Institute of Physical Chemistry "Ilie Murgulescu", Splaiul Independentei 202, 060021 Bucharest, Romania.
| | - Sorana Ionescu
- Department of Physical Chemistry, University of Bucharest, Bd Regina Elisabeta 4-12, Bucharest 030018, Romania
| | - Cristina L Nistor
- Polymer Department, National R&D Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei 202, 060021 Bucharest, Romania
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15
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Clément JE, Leray A, Bouhelier A, Finot E. Spectral pointillism of enhanced Raman scattering for accessing structural and conformational information on single protein. Phys Chem Chem Phys 2017; 19:458-466. [DOI: 10.1039/c6cp06667d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Temporal fluctuations of surface enhanced Raman spectra stem from single protein subdomains providing access to structural and conformational information on protein.
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Affiliation(s)
- Jean-Emmanuel Clément
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS
- Université Bourgogne Franche-Comté
- 21000 Dijon
- France
| | - Aymeric Leray
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS
- Université Bourgogne Franche-Comté
- 21000 Dijon
- France
| | - Alexandre Bouhelier
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS
- Université Bourgogne Franche-Comté
- 21000 Dijon
- France
| | - Eric Finot
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS
- Université Bourgogne Franche-Comté
- 21000 Dijon
- France
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16
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Neves RPP, Fernandes PA, Varandas AJC, Ramos MJ. Benchmarking of Density Functionals for the Accurate Description of Thiol-Disulfide Exchange. J Chem Theory Comput 2015; 10:4842-56. [PMID: 26584371 DOI: 10.1021/ct500840f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A set of 92 density functionals was employed to accurately characterize thiol-disulfide exchange. The properties we have benchmarked throughout the study include the geometry of a 15 atoms model system, the potential energy surface, the activation barrier, and the energy of reaction for thiol-disulfide exchange. Reference energies were determined at the CCSD(T)/CBS//MP2/aug-cc-pVDZ level of theory, and reference geometries were calculated at the MP2/aug-cc-pVTZ level. M11-L, M06-2X, M06-HF, N12-SX, PBE1PBE, PBEh1PBE, and OHSE2PBE described better the geometry of the model system, with average deviations of 0.06 Å in bond lengths (0.06 Å in bond-breaking lengths) and 1.9° in bond angles. On the other hand, the potential energy surface and its gradient were more accurately described by the hybrid density functional BHandH, closely followed by mPW1N, mPW1K, and mPWB1K. The barrier height and energy of reaction were better reproduced by the BMK and M06-2X functionals (deviations of 0.17 and 0.07 kcal·mol(-1), respectively) for a set of 10 Pople's basis sets. MN12-SX and M11-L showed very good results for the widely used 6-311++G(2d,2p) basis set, with deviations of 0.02 and 0.05 kcal·mol(-1), respectively. We studied the effect of the split-valence, diffuse, and polarized functions in the activation barrier of thiol-disulfide exchange, for a set of 10 Pople's basis sets. While increasing the splitting and polarization may increase the activation barrier in approximately 1 kcal·mol(-1), diffuse functions generally contribute to decreasing it no more than 0.10 kcal·mol(-1). In general, 13 functionals provided energies within 1 kcal·mol(-1) of the reference value. The BB1K density functional is one of the best density functionals to characterize thiol-disulfide exchange reactions; however, several density functionals with modified Perdew-Wang exchange and about 40% Hartree-Fock exchange, such as mPW1K, mPW1N, and mPWB1K, show a good performance, too.
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Affiliation(s)
- Rui P P Neves
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Pedro A Fernandes
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - António J C Varandas
- Departamento de Química, and Centro de Química, Universidade de Coimbra , 3004-535 Coimbra, Portugal
| | - Maria J Ramos
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
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Borzova VA, Markossian KA, Kara DA, Kurganov B. Kinetic regime of dithiothreitol-induced aggregation of bovine serum albumin. Int J Biol Macromol 2015; 80:130-8. [PMID: 26116389 DOI: 10.1016/j.ijbiomac.2015.06.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/18/2015] [Accepted: 06/20/2015] [Indexed: 12/25/2022]
Abstract
A search for agents, which are capable of effectively suppressing protein aggregation, and elaboration of the appropriate test systems, are among important problems of modern biochemistry and biotechnology. One such test system is based on dithiothreitol (DTT)-induced aggregation of bovine serum albumin (BSA). Study of the kinetics of DTT-induced aggregation of BSA by asymmetric flow field flow fractionation showed that a decrease in the portion of the non-aggregated protein in time followed the exponential law, the rate constant of the first order remaining unchanged at varying protein concentration (0.1M Na-phosphate buffer, pH 7.0; 45 °C). The obtained results indicate that the rate-limiting stage of the general aggregation process is that of unfolding of the protein molecule. When studying the kinetics of DTT-induced aggregation of BSA by dynamic light scattering, we proposed to use parameter K(LS) as a measure of the initial rate of aggregation. Parameter K(LS) corresponds to the initial slope of the dependence of (I-I0)(0.5) on time (I0 and I are the initial and current values of the light scattering intensity, respectively). The K(LS) value has been applied to estimate anti-aggregation activity of chemical chaperones (arginine, its derivatives and proline).
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Affiliation(s)
- Vera A Borzova
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Kira A Markossian
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Dmitriy A Kara
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Boris Kurganov
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia.
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18
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A theoretical study of the unfolding pathway of reduced Human serum albumin. J Mol Model 2015; 21:106. [DOI: 10.1007/s00894-015-2659-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 03/16/2015] [Indexed: 12/12/2022]
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19
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Concomitant Raman spectroscopy and dynamic light scattering for characterization of therapeutic proteins at high concentrations. Anal Biochem 2014; 472:7-20. [PMID: 25475399 DOI: 10.1016/j.ab.2014.11.016] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 11/19/2014] [Accepted: 11/20/2014] [Indexed: 11/21/2022]
Abstract
A Raman spectrometer and dynamic light scattering system were combined in a single platform (Raman-DLS) to provide concomitant higher order structural and hydrodynamic size data for therapeutic proteins at high concentration. As model therapeutic proteins, we studied human serum albumin (HSA) and intravenous immunoglobulin (IVIG). HSA concentration and temperature interval during heating did not affect the onset temperatures for conformation perturbation or aggregation. The impact of pH on thermal stability of HSA was tested at pHs 3, 5, and 8. Stability was the greatest at pH 8, but distinct unfolding and aggregation behaviors were observed at the different pHs. HSA structural transitions and aggregation kinetics were also studied in real time during isothermal incubations at pH 7. In a forced oxidation study, it was found that hydrogen peroxide (H2O2) treatment reduced the thermal stability of HSA. Finally, the structure and thermal stability of IVIG were studied, and a comprehensive characterization of heating-induced structural perturbations and aggregation was obtained. In conclusion, by providing comprehensive data on protein tertiary and secondary structures and hydrodynamic size during real-time heating or isothermal incubation experiments, the Raman-DLS system offers unique physical insights into the properties of high-concentration protein samples.
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Cottat M, Lidgi-Guigui N, Tijunelyte I, Barbillon G, Hamouda F, Gogol P, Aassime A, Lourtioz JM, Bartenlian B, de la Chapelle ML. Soft UV nanoimprint lithography-designed highly sensitive substrates for SERS detection. NANOSCALE RESEARCH LETTERS 2014; 9:2361. [PMID: 26089008 PMCID: PMC4494019 DOI: 10.1186/1556-276x-9-623] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 11/15/2014] [Indexed: 05/18/2023]
Abstract
We report on the use of soft UV nanoimprint lithography (UV-NIL) for the development of reproducible, millimeter-sized, and sensitive substrates for SERS detection. The used geometry for plasmonic nanostructures is the cylinder. Gold nanocylinders (GNCs) showed to be very sensitive and specific sensing surfaces. Indeed, we demonstrated that less than 4 ×10(6) avidin molecules were detected and contributed to the surface-enhanced Raman scattering (SERS) signal. Thus, the soft UV-NIL technique allows to obtain quickly very sensitive substrates for SERS biosensing on surfaces of 1 mm (2).
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Affiliation(s)
- Maximilien Cottat
- />CSPBAT (UMR 7244), CNRS-Université Paris 13, 74 rue Marcel Cachin, 93017 Bobigny, France
| | - Nathalie Lidgi-Guigui
- />CSPBAT (UMR 7244), CNRS-Université Paris 13, 74 rue Marcel Cachin, 93017 Bobigny, France
| | - Inga Tijunelyte
- />CSPBAT (UMR 7244), CNRS-Université Paris 13, 74 rue Marcel Cachin, 93017 Bobigny, France
| | - Grégory Barbillon
- />IEF CNRS UMR 8622, Université Paris-Sud, Bâtiment 220, Rue Ampère, 91405 Orsay, France
| | - Frédéric Hamouda
- />IEF CNRS UMR 8622, Université Paris-Sud, Bâtiment 220, Rue Ampère, 91405 Orsay, France
| | - Philippe Gogol
- />IEF CNRS UMR 8622, Université Paris-Sud, Bâtiment 220, Rue Ampère, 91405 Orsay, France
| | - Abdelhanin Aassime
- />IEF CNRS UMR 8622, Université Paris-Sud, Bâtiment 220, Rue Ampère, 91405 Orsay, France
| | - Jean-Michel Lourtioz
- />IEF CNRS UMR 8622, Université Paris-Sud, Bâtiment 220, Rue Ampère, 91405 Orsay, France
| | - Bernard Bartenlian
- />IEF CNRS UMR 8622, Université Paris-Sud, Bâtiment 220, Rue Ampère, 91405 Orsay, France
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21
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Wang Q, He J, Yan J, Wu D, Li H. Spectroscopy and docking simulations of the interaction between lochnericine and bovine serum albumin. LUMINESCENCE 2014; 30:240-6. [DOI: 10.1002/bio.2724] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/16/2014] [Accepted: 05/22/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Qing Wang
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Jiawei He
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Jin Yan
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Di Wu
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Hui Li
- College of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
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Bian HD, Peng XL, Huang FP, Yao D, Yu Q, Liang H. The Spectroscopy Study of the Binding of an Active Ingredient of Dioscorea Species with Bovine Serum Albumin with or without Co(2+) or Zn(2+). EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2014; 2014:247595. [PMID: 24991225 PMCID: PMC4065670 DOI: 10.1155/2014/247595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 05/06/2014] [Accepted: 05/15/2014] [Indexed: 11/17/2022]
Abstract
Diosgenin (DIO) is the active ingredient of Dioscorea species. The interaction of DIO with bovine serum albumin (BSA) was investigated through spectroscopic methods under simulated physiological conditions. The fluorescence quenching data revealed that the binding of DIO to BSA without or with Co(2+) or Zn(2+) was a static quenching process. The presence of Co(2+) or Zn(2+) both increased the static quenching constants K SV and the binding affinity for the BSA-DIO system. In the sight of the competitive experiment and the negative values of ΔH (0) and ΔS (0), DIO bound to site I of BSA mainly through the hydrogen bond and Van der Waals' force. In addition, the conformational changes of BSA were studied by Raman spectra, which revealed that the secondary structure of BSA and microenvironment of the aromatic residues were changed by DIO. The Raman spectra analysis indicated that the changes of conformations, disulfide bridges, and the microenvironment of Tyr, Trp residues of BSA induced by DIO with Co(2+) or Zn(2+) were different from that without Co(2+) or Zn(2+).
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Affiliation(s)
- He-Dong Bian
- Key Laboratory of Development and Application of Forest Chemicals of Guangxi, Guangxi University of Nationalities, Nanning 530006, China
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China
| | - Xia-Lian Peng
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China
| | - Fu-Ping Huang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China
| | - Di Yao
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China
| | - Qing Yu
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China
| | - Hong Liang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China
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Chakraborti S, Dhar G, Dwivedi V, Das A, Poddar A, Chakraborti G, Basu G, Chakrabarti P, Surolia A, Bhattacharyya B. Stable and potent analogues derived from the modification of the dicarbonyl moiety of curcumin. Biochemistry 2013; 52:7449-60. [PMID: 24063255 DOI: 10.1021/bi400734e] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Curcumin has shown promising therapeutic utilities for many diseases, including cancer; however, its clinical application is severely limited because of its poor stability under physiological conditions. Here we find that curcumin also loses its activity instantaneously in a reducing environment. Curcumin can exist in solution as a tautomeric mixture of keto and enol forms, and the enol form was found to be responsible for the rapid degradation of the compound. To increase the stability of curcumin, several analogues were synthesized in which the diketone moiety of curcumin was replaced by isoxazole (compound 2) and pyrazole (compound 3) groups. Isoxazole and pyrazole curcumins were found to be extremely stable at physiological pH, in addition to reducing atmosphere, and they can kill cancer cells under serum-depleted condition. Using molecular modeling, we found that both compounds 2 and 3 could dock to the same site of tubulin as the parent molecule, curcumin. Interestingly, compounds 2 and 3 also show better free radical scavenging activity than curcumin. Altogether, these results strongly suggest that compounds 2 and 3 could be good replacements for curcumin in future drug development.
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24
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Borzova VA, Markossian KA, Kara DA, Chebotareva NA, Makeeva VF, Poliansky NB, Muranov KO, Kurganov BI. Quantification of anti-aggregation activity of chaperones: a test-system based on dithiothreitol-induced aggregation of bovine serum albumin. PLoS One 2013; 8:e74367. [PMID: 24058554 PMCID: PMC3769246 DOI: 10.1371/journal.pone.0074367] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Accepted: 08/03/2013] [Indexed: 12/22/2022] Open
Abstract
The methodology for quantification of the anti-aggregation activity of protein and chemical chaperones has been elaborated. The applicability of this methodology was demonstrated using a test-system based on dithiothreitol-induced aggregation of bovine serum albumin at 45°C as an example. Methods for calculating the initial rate of bovine serum albumin aggregation (v agg) have been discussed. The comparison of the dependences of v agg on concentrations of intact and cross-linked α-crystallin allowed us to make a conclusion that a non-linear character of the dependence of v agg on concentration of intact α-crystallin was due to the dynamic mobility of the quaternary structure of α-crystallin and polydispersity of the α-crystallin-target protein complexes. To characterize the anti-aggregation activity of the chemical chaperones (arginine, arginine ethyl ester, arginine amide and proline), the semi-saturation concentration [L]0.5 was used. Among the chemical chaperones studied, arginine ethyl ester and arginine amide reveal the highest anti-aggregation activity ([L]0.5 = 53 and 58 mM, respectively).
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Affiliation(s)
- Vera A. Borzova
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Kira A. Markossian
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Dmitriy A. Kara
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Natalia A. Chebotareva
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Valentina F. Makeeva
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Nikolay B. Poliansky
- Department of Chemical and Biological Processes Kinetics, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Konstantin O. Muranov
- Department of Chemical and Biological Processes Kinetics, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Boris I. Kurganov
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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25
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Li B, Ray BH, Leister KJ, Ryder AG. Performance monitoring of a mammalian cell based bioprocess using Raman spectroscopy. Anal Chim Acta 2013; 796:84-91. [DOI: 10.1016/j.aca.2013.07.058] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 07/26/2013] [Accepted: 07/28/2013] [Indexed: 10/26/2022]
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26
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Wang Q, He J, Yan J, Wu D, Bai K, Li H. WITHDRAWN: Assessment of the interaction between lochnericine and bovine serum albumin by multispectroscopic methods. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tang CH, Shen L. Role of conformational flexibility in the emulsifying properties of bovine serum albumin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:3097-3110. [PMID: 23470054 DOI: 10.1021/jf305471k] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Although it is well recognized that the conformation state of a protein affects its surface properties, the importance of conformation flexibility to its functionality is still not well understood. This study systemically investigated the influence of protein concentration (c) and disulfide bond (S-S) cleavage with a reducing agent, β-mercaptoethanol (2-ME), on the conformation and emulsifying properties of an ideal globular protein, bovine serum albumin (BSA), with the aim to unravel the role of conformational flexibility in the functionality. The conformations were evaluated using size exclusion chromatography, dynamic light scattering (DLS), extrinsic fluorescence, and derivative UV spectroscopy. The emulsifying properties, including emulsifying ability, extent of droplet flocculation at a specific period of storage, and stability against flocculation and/or coalescence as well as creaming, were characterized using droplet size and creaming index analyses. The results indicated that the tertiary conformation of native BSA was closely dependent on its c (in the range of 0.05-1.0%), and increasing c resulted in a more compacted and rigid conformation. The c dependence largely determined the susceptibility of S-S bridges to reduction and even refolding of reduced BSA molecules. Interestingly, there was approximately a critical c (e.g., 0.25-0.5%) below which the S-S cleavage resulted in a gradual structural unfolding of the molecules and above which the situation was the reverse. On the other hand, the alteration with protein and 2-ME concentrations led to a variety of changes in emulsion size (d4,3; in water or 1% SDS) at 4 and 24 h and creaming index (up to 2 weeks). In general, at a low c value (e.g., 0.25%) increasing the S-S cleavage progressively improved the emulsifying ability and emulsion stability (especially against coalescence and creaming), whereas at c = 0.5 or 0.75%, the S-S cleavage, on the contrary, impaired the emulsifying properties, especially emulsion stability against flocculation and/or coalescence. These results suggest that the conformational flexibility of the protein (in solution) plays a vital role in different aspects of its emulsifying properties, for example, ease of structural unfolding at the interface, lateral interactions between adsorbed proteins, and formation of a viscoelastic interfacial layer (or multilayers). This knowledge could provide an in-depth understanding of the relationships between tertiary conformational flexibility and emulsifying properties of globular proteins.
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Affiliation(s)
- Chuan-He Tang
- Department of Food Science and Technology, South China University of Technology , Guangzhou 510640, People's Republic of China.
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28
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Paris G, Kraszewski S, Ramseyer C, Enescu M. About the structural role of disulfide bridges in serum albumins: evidence from protein simulated unfolding. Biopolymers 2012; 97:889-98. [PMID: 22899364 DOI: 10.1002/bip.22096] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The role of the 17 disulfide (S-S) bridges in preserving the native conformation of human serum albumin (HSA) is investigated by performing classical molecular dynamics (MD) simulations on protein structures with intact and, respectively, reduced S-S bridges. The thermal unfolding simulations predict a clear destabilization of the protein secondary structure upon reduction of the S-S bridges as well as a significant distortion of the tertiary structure that is revealed by the changes in the protein native contacts fraction. The effect of the S-S bridges reduction on the protein compactness was tested by calculating Gibbs free energy profiles with respect to the protein gyration radius. The theoretical results obtained using the OPLS-AA and the AMBER ff03 force fields are in agreement with the available experimental data. Beyond the validation of the simulation method, the results here reported provide new insights into the mechanism of the protein reductive/oxidative unfolding/folding processes. It is predicted that in the native conformation of the protein, the thiol (-SH) groups belonging to the same reduced S-S bridge are located in potential wells that maintain them in contact. The -SH pairs can be dispatched by specific conformational transitions of the peptide chain located in the neighborhood of the cysteine residues.
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Affiliation(s)
- Guillaume Paris
- Faculté des Sciences et Techniques, La Bouloie, Université de Franche-Comté, Besançon cedex, France
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Peng X, Yao D, Pan Y, Yu Q, Ni S, Bian H, Huang F, Liang H. Study on the structural changes of bovine serum albumin with effects on polydatin binding by a multitechnique approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:209-214. [PMID: 21723188 DOI: 10.1016/j.saa.2011.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/09/2011] [Accepted: 06/02/2011] [Indexed: 05/31/2023]
Abstract
Polydatin is a traditional Chinese medicine which shows effective biological activity as antimicrobial and antiviral agent. The secondary structure changes of bovine serum albumin (BSA) were investigated by the methods of Fourier transform infrared spectroscopy (FT-IR), circular dichroism (CD) and Raman spectroscopy. The experimental results indicated that polydatin changed the secondary structure of BSA. The presence of polydatin decreased α-helix content of BSA. The conformations of disulfide bridges and the microenvironment of Tyr, Trp residues were also changed.
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Affiliation(s)
- Xialian Peng
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, PR China
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30
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Binding of engeletin with bovine serum albumin: insights from spectroscopic investigations. J Fluoresc 2011; 22:511-9. [PMID: 21947612 DOI: 10.1007/s10895-011-0985-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 09/16/2011] [Indexed: 11/27/2022]
Abstract
In this paper, several spectroscopic techniques were used to investigate the interaction of engeletin (ELN) with bovine serum albumin (BSA). The analysis of UV-Vis absorption and fluorescence spectra revealed that ELN and BSA formed a static complex ELN-BSA, and ELN quenched the fluorescence of BSA effectively. According to the thermodynamic parameters ΔS(0) = 47.27 J·mol(-1)·K(-1) and ΔΗ(0) = -10.34 kJ·mol(-1), the hydrophobic and hydrogen bond interactions were suggested to be the major interaction forces between ELN and BSA. Raman spectroscopy indicated that the binding of ELN slightly changed the conformations and microenviroment of BSA and decreased the α-helix content of BSA.
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31
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Adsorption and photocatalytic degradation of human serum albumin on TiO2 and Ag–TiO2 films. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.05.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Site-selective probe for investigating the asynchronous unfolding of domains in bovine serum albumin. Talanta 2011; 84:881-6. [DOI: 10.1016/j.talanta.2011.02.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 02/09/2011] [Accepted: 02/16/2011] [Indexed: 11/20/2022]
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33
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Iozzi MF, Helgaker T, Uggerud E. Influence of external force on properties and reactivity of disulfide bonds. J Phys Chem A 2011; 115:2308-15. [PMID: 21366304 DOI: 10.1021/jp109428g] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanochemistry of the disulfide bridge--that is, the influence of an externally applied force on the reactivity of the sulfur-sulfur bond--is investigated by unrestricted Kohn-Sham theory. Specifically, we apply the COGEF (constrained geometry simulates external force) approach to characterize the mechanochemistry of the disulfide bond in three different chemical environments: dimethyl disulfide, cystine, and a 102-atom model of the I27 domain in the titin protein. Furthermore, the mechanism of the thiol-disulfide reduction reaction under the effect of an external force is investigated by considering the COGEF potential for the adduct and transition-state clusters. With the unrestricted Becke-three-parameter-Lee-Yang-Parr (UB3LYP) exchange-correlation functional in the 6-311++G(3df,3pd) orbital basis, the rupture force of dimethyl disulfide is 3.8 nN at a disulfide bond elongation of 35 pm. The interaction with neighboring groups and the effect of conformational rigidity of the protein environment have little influence on the mechanochemical characteristics. Upon stretching, we make the following observations: the diradical character of the disulfide bridge increases; the energy difference between the singlet ground state and low-lying triplet state decreases; and the disulfide reduction is promoted by an external force in the range 0.1-0.4 nN. Our model of the interplay between force and reaction mechanism is in qualitative agreement with experimental observations.
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Affiliation(s)
- Maria Francesca Iozzi
- The Center for Theoretical and Computational Chemistry (CTCC), Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway.
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Francis GL. Albumin and mammalian cell culture: implications for biotechnology applications. Cytotechnology 2010; 62:1-16. [PMID: 20373019 PMCID: PMC2860567 DOI: 10.1007/s10616-010-9263-3] [Citation(s) in RCA: 221] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2009] [Accepted: 03/10/2010] [Indexed: 12/15/2022] Open
Abstract
Albumin has a long historical involvement in design of media for the successful culture of mammalian cells, in both the research and commercial fields. The potential application of albumins, bovine or human serum albumin, for cell culture is a by-product of the physico-chemical, biochemical and cell-specific properties of the molecule. In this review an analysis of these features of albumin leads to a consideration of the extracellular and intracellular actions of the molecule, and importantly the role of its interactions with numerous ligands or bioactive factors that influence the growth of cells in culture: these include hormones, growth factors, lipids, amino acids, metal ions, reactive oxygen and nitrogen species to name a few. The interaction of albumin with the cell in relation to these co-factors has a potential impact on metabolic and biosynthetic activity, cell proliferation and survival. Application of this knowledge to improve the performance in manufacturing biotechnology and in the emerging uses of cell culture for tissue engineering and stem cell derived therapies is an important prospect.
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Affiliation(s)
- Geoffrey L Francis
- Applied R&D, Novozymes Biopharma AU Ltd, 28 Dalgleish Street, Thebarton, SA, 5031, Australia,
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David C, Enescu M. Free Energy Calculations on Disulfide Bridges Reduction in Proteins by Combining ab Initio and Molecular Mechanics Methods. J Phys Chem B 2010; 114:3020-7. [DOI: 10.1021/jp910340t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Catalina David
- Laboratoire de Chimie Physique et Rayonnement, UMR CEA E4, University of Franche-Comte, 16 route de Gray, 25030 Besancon, France
| | - Mironel Enescu
- Laboratoire de Chimie Physique et Rayonnement, UMR CEA E4, University of Franche-Comte, 16 route de Gray, 25030 Besancon, France
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David C, Foley S, Enescu M. Protein S–S bridge reduction: a Raman and computational study of lysozyme interaction with TCEP. Phys Chem Chem Phys 2009; 11:2532-42. [DOI: 10.1039/b815492a] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Komatsu T, Nakagawa A, Curry S, Tsuchida E, Murata K, Nakamura N, Ohno H. The role of an amino acid triad at the entrance of the heme pocket in human serum albumin for O2 and CO binding to iron protoporphyrin IX. Org Biomol Chem 2009; 7:3836-41. [DOI: 10.1039/b909794e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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