1
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Aonofriesei F. Surfactants' Interplay with Biofilm Development in Staphylococcus and Candida. Pharmaceutics 2024; 16:657. [PMID: 38794319 PMCID: PMC11125353 DOI: 10.3390/pharmaceutics16050657] [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: 04/12/2024] [Revised: 05/09/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024] Open
Abstract
The capacity of micro-organisms to form biofilms is a pervasive trait in the microbial realm. For pathogens, biofilm formation serves as a virulence factor facilitating successful host colonization. Simultaneously, infections stemming from biofilm-forming micro-organisms pose significant treatment challenges due to their heightened resistance to antimicrobial agents. Hence, the quest for active compounds capable of impeding microbial biofilm development stands as a pivotal pursuit in biomedical research. This study presents findings concerning the impact of three surfactants, namely, polysorbate 20 (T20), polysorbate 80 (T80), and sodium dodecyl sulfate (SDS), on the initial stage of biofilm development in both Staphylococcus aureus and Candida dubliniensis. In contrast to previous investigations, we conducted a comparative assessment of the biofilm development capacity of these two taxonomically distant groups, predicated on their shared ability to reduce TTC. The common metabolic trait shared by S. aureus and C. dubliniensis in reducing TTC to formazan facilitated a simultaneous evaluation of biofilm development under the influence of surfactants across both groups. Our results revealed that surfactants could impede the development of biofilms in both species by disrupting the initial cell attachment step. The observed effect was contingent upon the concentration and type of compound, with a higher inhibition observed in culture media supplemented with SDS. At maximum concentrations (5%), T20 and T80 significantly curtailed the formation and viability of S. aureus and C. dubliniensis biofilms. Specifically, T20 inhibited biofilm development by 75.36% in S. aureus and 71.18% in C. dubliniensis, while T80 exhibited a slightly lower inhibitory effect, with values ranging between 66.68% (C. dubliniensis) and 65.54% (S. aureus) compared to the controls. Incorporating these two non-toxic surfactants into pharmaceutical formulations could potentially enhance the inhibitory efficacy of selected antimicrobial agents, particularly in external topical applications.
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Affiliation(s)
- Florin Aonofriesei
- Department of Natural Sciences, Faculty of Natural and Agricultural Sciences, Ovidius University of Constanta, 1, University Street, 900470 Constanța, Romania
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2
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Mohanty S, Mishra SS, Kuldeep, Maharana J, Subuddhi U. Insight into the Effect of Submicellar Concentrations of Sodium Deoxycholate on the Structure, Stability, and Activity of Bovine and Human Serum Albumin: An Interesting Comparison between Single and Double Tryptophan Proteins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5228-5244. [PMID: 38413419 DOI: 10.1021/acs.langmuir.3c03541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The progressive escalation in the applications of bile salts in diverse fields has triggered research on their interaction with various biological macromolecules, especially with proteins. A proper understanding of the interaction process of bile salts, particularly in the lower concentrations range, with the serum albumin seems important since the normal serum concentration of bile salts is approximately in the micromolar range. The current study deals with a comprehensive and comparative analysis of the interaction of submicellar concentrations of sodium deoxycholate (NaDC) with two homologous transport proteins: bovine serum albumin (BSA) and human serum albumin (HSA). HSA and BSA with one and two tryptophans, respectively, provide the opportunity for an interesting comparison of tryptophan fluorescence behavior on interaction with NaDC. The study suggests a sequential interaction of NaDC in three discrete stages with the two proteins. A detailed study using warfarin and ibuprofen as site markers provides information about the sites of interaction, which is further confirmed by inclusive molecular dynamics simulation analysis. Moreover, the comparison of the thermodynamics and stability of the NaDC-serum albumin complexes confirms the stronger interaction of NaDC with BSA as compared to that with HSA. The differential interaction between the bile salt and the two serum albumins is further established from the difference in the extent of decrease in the esterase-like activity assay of the proteins in the presence of NaDC. Therefore, the present study provides important insight into the effect of submicellar concentrations of NaDC on the structure, stability, and activity of the two homologous serum albumins and thus can contribute not only to the general understanding of the complex nature of serum albumin-bile salt interactions but also to the design of more effective pharmaceutical formulations in the field of drug delivery and biomedical research.
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Affiliation(s)
- Subhrajit Mohanty
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Smruti Snigdha Mishra
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Kuldeep
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Jitendra Maharana
- Distributed Information Centre, Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat 785013, Assam, India
| | - Usharani Subuddhi
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
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3
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Stachurska K, Marcisz U, Długosz M, Antosiewicz JM. Kinetics of Structural Transitions Induced by Sodium Dodecyl Sulfate in α-Chymotrypsin. ACS OMEGA 2023; 8:49137-49149. [PMID: 38162786 PMCID: PMC10753550 DOI: 10.1021/acsomega.3c07256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/16/2023] [Accepted: 11/23/2023] [Indexed: 01/03/2024]
Abstract
The temporal changes in circular dichroism at 222 and 260 nm were recorded by using stopped-flow spectroscopy after mixing α-chymotrypsin solutions with sodium dodecyl sulfate solutions. Simultaneously with the circular dichroism signal, the fluorescence emission was recorded. Changes in the secondary and tertiary structures of chymotrypsin induced by sodium dodecyl sulfate are characterized by either three or four one-way reactions with relaxation amplitudes and times precisely determined by an advanced numerical procedure of Kuzmič. Quantitatively, transitions within the secondary and tertiary structures of the protein are significantly different. Moreover, changes in the tertiary structure depend on the type of recorded signal (either circular dichroism or fluorescence) and the wavelength of the incident radiation. The latter observation is particularly interesting as it indicates that the contributions of protein's different tryptophans to the total recorded fluorescence depend on the excitation wavelength. We present several results justifying this hypothesis.
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Affiliation(s)
- Karolina Stachurska
- Biophysics Division, Institute of Experimental
Physics, Faculty of Physics, University
of Warsaw, Pasteura 5 Street, 02-093 Warsaw, Poland
| | - Urszula Marcisz
- Biophysics Division, Institute of Experimental
Physics, Faculty of Physics, University
of Warsaw, Pasteura 5 Street, 02-093 Warsaw, Poland
| | - Maciej Długosz
- Biophysics Division, Institute of Experimental
Physics, Faculty of Physics, University
of Warsaw, Pasteura 5 Street, 02-093 Warsaw, Poland
| | - Jan M. Antosiewicz
- Biophysics Division, Institute of Experimental
Physics, Faculty of Physics, University
of Warsaw, Pasteura 5 Street, 02-093 Warsaw, Poland
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4
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Mould R, Sargent PW, Huang Y, Fields AL, Zhang L, Herbert FC, Stewart SL, Wang T. Impact of Primary Container Closure System on PS80 Oxidation and the Mechanistic Understanding. Pharm Res 2023; 40:1965-1976. [PMID: 37434039 DOI: 10.1007/s11095-023-03556-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 06/20/2023] [Indexed: 07/13/2023]
Abstract
PURPOSE Polysorbate oxidation can potentially lead to protein degradation and loss of potency, which has been a challenge for the pharmaceutical industry for decades. Many factors have been reported to impact polysorbate oxidation rate, including types of elemental impurities, peroxide content, pH, light exposure, grades of polysorbate, etc. Even though there are many publications in this field, the impact of primary container closure system on PS80 oxidation has not been systematically studied or reported. The purpose of the current study is to close this gap. METHODS Placebo PS80 formulations were prepared and filled into different container-closure systems (CCS), including different types of glass vials and polymer vials. Oleic acid content was monitored on stability as a surrogate value for PS80 content, which will decline upon oxidation. ICP-MS analysis and metal spiking studies were carried out to correlate the PS80 oxidation rate with metals leached from primary containers. RESULTS PS80 degrades via oxidation at the fastest rate in glass vials with high coefficient of expansion (COE), followed by glass vials with low coefficient of expansion, while polymer vials minimized the oxidation of PS80 in most formulation conditions explored in this paper. ICP-MS analysis demonstrated that 1) 51 COE glass has more metal leachables than 33 COE glass in this study; and 2) More metal leachables correlates with faster PS80 oxidation. Metal spiking studies confirmed the hypothesis that aluminum and iron have a synergistic catalysis effect on PS80 oxidation. CONCLUSIONS Primary containers of drug products play a significant role in the rate of PS80 oxidation. This study revealed a new major contributor to PS80 oxidation and potential mitigation strategy for biological drug products.
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Affiliation(s)
- Ryan Mould
- Lilly Research Laboratories: Eli Lilly and Company, Indianapolis, Indiana, USA
| | | | - Yining Huang
- Lilly Research Laboratories: Eli Lilly and Company, Indianapolis, Indiana, USA
| | - Allison L Fields
- Lilly Research Laboratories: Eli Lilly and Company, Indianapolis, Indiana, USA
| | - Lin Zhang
- Lilly Research Laboratories: Eli Lilly and Company, Indianapolis, Indiana, USA
| | | | | | - Tingting Wang
- Lilly Research Laboratories: Eli Lilly and Company, Indianapolis, Indiana, USA.
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5
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Shen Q, Zheng W, Han F, Dai J, Song R, Li J, Li Y, Li B, Chen Y. Quantitative analysis and interfacial properties of mixed pea protein isolate-phospholipid adsorption layer. Int J Biol Macromol 2023; 232:123487. [PMID: 36736980 DOI: 10.1016/j.ijbiomac.2023.123487] [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: 10/25/2022] [Revised: 01/23/2023] [Accepted: 01/26/2023] [Indexed: 02/04/2023]
Abstract
Proteins and low-molecular-weight (LMW) surfactants are widely used for the physical stabilization of many emulsion-based food products. This study investigated the oil-water interfacial behavior between pea protein isolate (PPI) and phospholipid (PL). The emulsions prepared with different concentrations of PPI and PL were stabilized by their synergetic or competitive adsorption at the oil-water interface. In addition, the quantitative proteomics results could illustrate the displacements of proteins by PL. The result showed that the vicilin (7S) could be preferentially displaced by PL. Meanwhile, the results of quartz crystal microbalance with dissipation (QCM-D) indicated the high affinity of legumin (11S) with PL, suggesting that the legumin possessed higher interfacial affinity to prevent interfacial displacement. This research could help us to understand the interaction and competitive adsorption between plant proteins and LMW surfactants profoundly, which could promote the development of plant protein-based emulsion beverage with improved stability.
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Affiliation(s)
- Qian Shen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Zheng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Fei Han
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jun Dai
- Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering, Hubei University of Technology, Wuhan 430068, China
| | - Rong Song
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yan Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yijie Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China; Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China.
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6
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Treptow W. Allosteric Modulation of Membrane Proteins by Small Low-Affinity Ligands. J Chem Inf Model 2023; 63:2047-2057. [PMID: 36933226 DOI: 10.1021/acs.jcim.2c01542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
Membrane proteins may respond to a variety of ligands under an applied external stimulus. These ligands include small low-affinity molecules that account for functional effects in the mM range. Understanding the modulation of protein function by low-affinity ligands requires characterizing their atomic-level interactions under dilution, challenging the current resolution of theoretical and experimental routines. Part of the problem derives from the fact that small low-affinity ligands may interact with multiple sites of a membrane protein in a highly degenerate manner to a degree that it is better conceived as a partition phenomenon, hard to track at the molecular interface of the protein. Looking for new developments in the field, we rely on the classic two-state Boltzmann model to devise a novel theoretical description of the allosteric modulation mechanism of membrane proteins in the presence of small low-affinity ligands and external stimuli. Free energy stability of the partition process and its energetic influence on the protein coupling with the external stimulus are quantified. The outcome is a simple formulation that allows the description of the equilibrium shifts of the protein in terms of the grand-canonical partition function of the ligand at dilute concentrations. The model's predictions of the spatial distribution and response probability shift across a variety of ligand concentrations, and thermodynamic conjugates can be directly compared to macroscopic measurements, making it especially useful to interpret experimental data at the atomic level. Illustration and discussion of the theory is shown in the context of general anesthetics and voltage-gated channels for which structural data are available.
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Affiliation(s)
- Werner Treptow
- Laboratório de Biologia Teórica e Computacional (LBTC), Universidade de Brasília, Distrito Federal, Brasília CEP 70904-970, Brasil
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7
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Stachurska K, Marcisz U, Długosz M, Antosiewicz JM. Circular Dichroism Spectra of α-Chymotrypsin-SDS Solutions Depend on the Procedure of Their Preparation. ACS OMEGA 2022; 7:23782-23789. [PMID: 35847307 PMCID: PMC9280762 DOI: 10.1021/acsomega.2c02438] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We recorded the far- and near-UV circular dichroism (CD) spectra of solutions of α-chymotrypsin and sodium dodecyl sulfate (SDS) with the final surfactant concentration significantly above the critical micellization concentration. Solutions were prepared using three different procedures. The reference procedure was to mix the chymotrypsin solution with the SDS solution once, immediately achieving the final SDS concentration. In alternative procedures, the protein solutions initially contained some SDS and were mixed with pure SDS solutions at a concentration to provide the same final surfactant as the reference mixing. We demonstrate that the supplementation to the selected final concentration of SDS of the pure chymotrypsin solution leads to different CD spectra than the supplementation to this final concentration of SDS in the chymotrypsin solution containing a small concentration of a few millimolar SDS. These differences disappear when the initial concentration of SDS in the protein solution, which we then supplement to the indicated final concentration, is higher. This suggests the irreversibility of the processes caused by the addition of SDS to chymotrypsin and the influence of the initial amount of this surfactant on the processes occurring with its further addition to the solution. For quantitative analysis of far-UV CD spectra in terms of populations of protein secondary structure elements, we used four well-established software packages. All programs consistently indicate that the observed differences in the far-UV CD spectra can be explained by the differences in the increase in the population of helical forms in chymotrypsin under the influence of SDS.
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8
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Kuznetsova DA, Kuznetsov DM, Zakharov VM, Zakharova LY. Interaction of Bovine Serum Albumin with Cationic Imidazolium Surfactants Containing a Methoxyphenyl Fragment. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222070143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Thompson KD, Danielson EP, Peterson KN, Nocevski NO, Boock JT, Berberich JA. The Amphoteric Surfactant N, N-Dimethyldodecylamine N-Oxide Unfolds β-Lactoglobulin above the Critical Micelle Concentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4090-4101. [PMID: 35325533 DOI: 10.1021/acs.langmuir.2c00172] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Understanding the interactions between surfactants and proteins is important for the formulation of consumer products as surfactant binding can alter protein activity and stability. Additionally, the structure of the protein-surfactant complex can influence surface activity, which is important for emulsion and foam development. N,N-Dimethyldodecylamine N-oxide (DDAO) is an amphoteric surfactant that is nonionic at high pH. It is often used as a foam booster in detergent formulations and for the extraction of membrane proteins. In this study, a variety of biophysical characterization methods was used to investigate the impact of DDAO at pH 8 on the structure of the globular protein β-lactoglobulin (βLG). Pyrene fluorescence and surface tension studies show that βLG had minimal impact on the critical micelle concentration (CMC) of DDAO, while fluorescence and circular dichroism spectroscopy found unfolding of βLG at concentrations of DDAO greater than the CMC. Small-angle X-ray scattering results confirm changes in the structure of βLG at DDAO concentrations above the CMC. Taken together, DDAO behaves like nonionic and zwitterionic surfactants below its CMC with limited interaction with βLG, while it induces protein unfolding at concentrations higher than the CMC, resulting in a protein-surfactant complex structure that resembles a protein-decorated micelle.
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Affiliation(s)
- Kayla D Thompson
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, Ohio 45056, United States
| | - Evan P Danielson
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, Ohio 45056, United States
| | - Kerri N Peterson
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, Ohio 45056, United States
| | - Nicholas O Nocevski
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, Ohio 45056, United States
| | - Jason T Boock
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, Ohio 45056, United States
| | - Jason A Berberich
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, Ohio 45056, United States
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10
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Javadi A, Dowlati S, Shourni S, Miller R, Kraume M, Kopka K, Eckert K. Experimental techniques to study protein-surfactant interactions: New insights into competitive adsorptions via drop subphase and interface exchange. Adv Colloid Interface Sci 2022; 301:102601. [PMID: 35114446 DOI: 10.1016/j.cis.2022.102601] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/10/2022] [Indexed: 01/05/2023]
Abstract
Protein surfactant (PS) interactions is an essential topic for many fundamental and technological applications such as life science, nanobiotechnology processes, food industry, biodiesel production and drug delivery systems. Several experimental techniques and data analysis approaches have been developed to characterize PS interactions in bulk and at interfaces. However, to evaluate the mechanisms and the level of interactions quantitatively, e.g., PS ratio in complexes, their stability in bulk, and reversibility of their interfacial adsorption, new experimental techniques and protocols are still needed, especially with relevance for in-situ biological conditions. The available standard techniques can provide us with the basic understanding of interactions mainly under static conditions and far from physiological criteria. However, detailed measurements at complex interfaces can be formidable due to the sophisticated tools required to carefully probe nanometric phenomena at interfaces without disturbing the adsorbed layer. Tensiometry-based techniques such as drop profile analysis tensiometry (PAT) have been among the most powerful methods for characterizing protein's and surfactant's adsorption layers at interfaces via measuring equilibrium and dynamic interfacial tension and dilational rheology analysis. PAT provides us with insightful data such as kinetics and isotherms of adsorption and related surface activity parameters. However, the data analysis and interpretation can be challenging for mixed protein-surfactant solutions via standard PAT experimental protocols. The combination of a coaxial double capillary (micro flow exchange system) with drop profile analysis tensiometry (CDC-PAT) is a promising tool to provide valuable results under different competitive adsorption/desorption conditions via novel experimental protocols. CDC-PAT provides unique experimental protocols to exchange the droplet subphase in a continuous dynamic mode during the in-situ analysis of the corresponding interfacial adsorbed layer. The contribution of diffusion/convection mechanisms on the kinetics of the adsorption/desorption processes can also be investigated using CDC-PAT. Here, firstly, we review the commonly available techniques for characterizing protein-surfactant interactions in the bulk phase and at interfaces. Secondly, we give an overview for applications of the coaxial double capillary PAT setup for investigations of mixed protein-surfactant adsorbed layers and address recently developed protocols and analysis procedures. Exploring the competitive sequential adsorption of proteins and surfactants and the reversibility of pre-adsorbed layers via the subphase exchange are the particular experiments we can perform using CDC-PAT. Also the sequential and simultaneous competitive adsorption/desorption processes of some ionic and nonionic surfactants (SDS, CTAB, DTAB, and Triton) and proteins (bovine serum albumin (BSA), lysozyme, and lipase) using CDC-PAT are discussed. Last but not least, the fabrication of micro-nanocomposite layers and membranes are additional applications of CDC-PAT discussed in this work.
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11
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Fatma I, Sharma V, Thakur RC, Kumar A. Current trends in protein-surfactant interactions: A review. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117344] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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12
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Experimental and in silico investigation on the interaction of indomethacin with bovine serum albumin: Effect of sodium dodecyl sulfate surfactant monomers on the binding. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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13
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de Castro ASB, de Paula HMC, Coelho YL, Hudson EA, Pires ACS, da Silva LHM. Kinetic and thermodynamic of lactoferrin - Ethoxylated-nonionic surfactants supramolecular complex formation. Int J Biol Macromol 2021; 187:325-331. [PMID: 34280448 DOI: 10.1016/j.ijbiomac.2021.07.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 11/19/2022]
Abstract
Understanding nonionic surfactant-protein interactions is fundamental from both technological and scientific points of view. However, there is a complete absence of kinetic data for such interactions. We employed surface plasmon resonance (SPR) to determine the kinetic and thermodynamic parameters of bovine lactoferrin-Brij58 interactions at various temperatures under physiological conditions (pH 7.4). The adsorption process was accelerated with increasing temperature, while the desorption rate decreased, resulting in a more thermodynamically stable complex. The kinetic energetic parameters obtained for the formation of the activated complex, [bLF-Brij58]‡, indicated that the potential energy barrier for [bLF-Brij58]‡ formation arises primarily from the reduction in system entropy. [bLF-Brij58]○ formation was entropically driven, indicating that hydrophobic interactions play a fundamental role in bLF interactions with Brij58.
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Affiliation(s)
- Alan Stampini Benhame de Castro
- Colloidal, macromolecular and Green Chemistry (QUIVECOM), Chemistry Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Hauster Maximiler Campos de Paula
- Colloidal, macromolecular and Green Chemistry (QUIVECOM), Chemistry Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Yara Luiza Coelho
- Colloidal, macromolecular and Green Chemistry (QUIVECOM), Chemistry Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil; Colloid Chemistry Group, Chemistry Institute, Federal University of Alfenas (UNIFAL-MG), Rua Gabriel Monteiro da Silva, 700, 37130-000 Alfenas, MG, Brazil
| | - Eliara Acipreste Hudson
- Applied Molecular Thermodynamic (THERMA), Food Technology Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Ana Clarissa S Pires
- Applied Molecular Thermodynamic (THERMA), Food Technology Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Luis Henrique M da Silva
- Colloidal, macromolecular and Green Chemistry (QUIVECOM), Chemistry Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil.
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14
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Jiang Y, Tian M, Wang Y, Xu W, Guo X. Effect of sulfobetaine surfactant on the activities of bromelain and polyphenoloxidase. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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Surfactants: physicochemical interactions with biological macromolecules. Biotechnol Lett 2021; 43:523-535. [PMID: 33534014 PMCID: PMC7872986 DOI: 10.1007/s10529-020-03054-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 12/07/2020] [Indexed: 12/14/2022]
Abstract
Macromolecules are essential cellular components in biological systems responsible for performing a large number of functions that are necessary for growth and perseverance of living organisms. Proteins, lipids and carbohydrates are three major classes of biological macromolecules. To predict the structure, function, and behaviour of any cluster of macromolecules, it is necessary to understand the interaction between them and other components through basic principles of chemistry and physics. An important number of macromolecules are present in mixtures with surfactants, where a combination of hydrophobic and electrostatic interactions is responsible for the specific properties of any solution. It has been demonstrated that surfactants can help the formation of helices in some proteins thereby promoting protein structure formation. On the other hand, there is extensive research towards the use of surfactants to solubilize drugs and pharmaceuticals; therefore, it is evident that the interaction between surfactants with macromolecules is important for many applications which includes environmental processes and the pharmaceutical industry. In this review, we describe the properties of different types of surfactants that are relevant for their physicochemical interactions with biological macromolecules, from macromolecules–surfactant complexes to hydrophobic and electrostatic interactions.
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16
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Huang S, He J, Han L, Lin H, Liu G, Zhang W. Zein-Polyglycerol Conjugates with Enhanced Water Solubility and Stabilization of High Oil Loading Emulsion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:11810-11816. [PMID: 32991806 DOI: 10.1021/acs.jafc.0c04156] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
To increase the water solubility of zein as a stabilizing agent for oil-in-water (O/W) emulsions, three zein-polyglycerol (Zein-PG) conjugates, Zein-PG-2, Zein-PG-6, and Zein-PG-10, were prepared by dehydration between zein and polyglycerol aldehydes obtained by NaIO4 oxidation of polyglycerol-2, -6, and -10 and characterized by free amine content, grafting degree, Fourier transform infrared spectroscopy, and fluorescence spectra. All conjugates dispersed in water as nanoparticles were verified by transmission electron microscopy. Conjugation with PG changed the isoelectric point of zein from 6.2 to 6.8 and to 4.0. Zein-PG-6 and Zein-PG-10 showed strong stabilization on the O/W emulsions with 18-fold loading of soybean oil on the basis of conjugate mass, displaying high oil loading capacity. Confocal laser scanning microscopy (CLSM) confirmed the O/W structure of emulsions and that the absorption of Zein-PG-10 on the oil droplet surface offered the driving force to be stable. The present Zein-PG conjugates thus produced an enticing resource for use as nanocarriers or bioemulsifiers in food or pharmaceutical industries.
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Affiliation(s)
- Shuangshuang Huang
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, College of Food Science & Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Junbo He
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, College of Food Science & Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Lijuan Han
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, College of Food Science & Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Hong Lin
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, College of Food Science & Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Gang Liu
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, College of Food Science & Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Weinong Zhang
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, College of Food Science & Engineering, Wuhan Polytechnic University, Wuhan 430023, China
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17
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Sanchez-Fernandez A, Diehl C, Houston JE, Leung AE, Tellam JP, Rogers SE, Prevost S, Ulvenlund S, Sjögren H, Wahlgren M. An integrative toolbox to unlock the structure and dynamics of protein-surfactant complexes. NANOSCALE ADVANCES 2020; 2:4011-4023. [PMID: 36132802 PMCID: PMC9417085 DOI: 10.1039/d0na00194e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 07/11/2020] [Indexed: 05/06/2023]
Abstract
The interactions between protein and surfactants play an important role in the stability and performance of formulated products. Due to the high complexity of such interactions, multi-technique approaches are required to study these systems. Here, an integrative approach is used to investigate the various interactions in a model system composed of human growth hormone and sodium dodecyl sulfate. Contrast variation small-angle neutron scattering was used to obtain information on the structure of the protein, surfactant aggregates and surfactant-protein complexes. 1H and 1H-13C HSQC nuclear magnetic resonance spectroscopy was employed to probe the local structure and dynamics of specific amino acids upon surfactant addition. Through the combination of these advanced methods with fluorescence spectroscopy, circular dichroism and isothermal titration calorimetry, it was possible to identify the interaction mechanisms between the surfactant and the protein in the pre- and post-micellar regimes, and interconnect the results from different techniques. As such, the protein was revealed to evolve from a partially unfolded conformation at low SDS concentration to a molten globule at intermediate concentrations, where the protein conformation and local dynamics of hydrophobic amino acids are partially affected compared to the native state. At higher surfactant concentrations the local structure of the protein appears disrupted, and a decorated micelle structure is observed, where the protein is wrapped around a surfactant assembly. Importantly, this integrative approach allows for the identification of the characteristic fingerprints of complex transitions as seen by each technique, and establishes a methodology for an in-detail study of surfactant-protein systems.
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Affiliation(s)
| | - Carl Diehl
- SARomics Biostructures AB Medicon Village, Scheelevägen 2 223 81 Lund Sweden
| | | | - Anna E Leung
- European Spallation Source Box 176 221 00 Lund Sweden
| | - James P Tellam
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory Didcot OX11 0QX UK
| | - Sarah E Rogers
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory Didcot OX11 0QX UK
| | - Sylvain Prevost
- Institut Laue-Langevin 71 Avenue des Martyrs 38000 Grenoble France
| | - Stefan Ulvenlund
- Food Technology, Engineering and Nutrition, Lund University Box 124 221 00 Lund Sweden
- EnzaBiotech AB Scheelevägen 22 223 63 Lund Sweden
| | - Helen Sjögren
- Ferring Pharmaceuticals A/S Kay Fiskers Plads 11 2300 Copenhagen S Denmark
| | - Marie Wahlgren
- Food Technology, Engineering and Nutrition, Lund University Box 124 221 00 Lund Sweden
- EnzaBiotech AB Scheelevägen 22 223 63 Lund Sweden
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18
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Wang J, Liu D, Guo X, Yan C. Ammonium and imidazolium-based amphiphilic tetramethoxy resorcinarenes: Adsorption, micellization, and protein binding. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113587] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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19
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Kaur J, Giri A, Bhattacharya M. The protein-surfactant stoichiometry governs the conformational switching and amyloid nucleation kinetics of tau K18. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2020; 49:425-434. [PMID: 32691116 DOI: 10.1007/s00249-020-01447-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 06/07/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Amyloids are pathological hallmarks of a number of debilitating neurodegenerative diseases. Understanding the molecular mechanism of protein amyloid assembly with an emphasis on structural characterization of early, key prefibrillar species is important for targeted drug design and clinical interventions. Tau is an intrinsically disordered, microtubule-binding protein which is also implicated in various neurodegenerative disorders such as frontotemporal dementia, Down's syndrome, Alzheimer's disease, etc. Earlier reports have demonstrated that tau aggregation in vitro is triggered by anionic inducers, presumably due to charge compensation which facilitates intermolecular association between the tau polypeptide chains. However, the molecular mechanism of tau amyloid aggregation, involving the structural characterization of amyloidogenic intermediates formed especially during early key steps, remains elusive. In this work, we have employed a spectroscopic toolbox to elucidate the mechanism of anionic surfactant-induced disorder-to-order amyloid transition of a tau segment. This study revealed that the amyloid assembly is mediated via binding-induced conformational switching into an early partially helical amyloid-competent intermediate. Additionally, protein and inducer concentration-dependent studies indicated that at the higher protein and/or inducer concentrations, competing off-pathway intermediates dampen the amyloid assembly which implies that the stoichiometry of protein and inducer plays a key regulatory role in the amyloid nucleation and fibril elongation kinetics.
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Affiliation(s)
- Jaspreet Kaur
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Thapar Technology Campus, Bhadson Road, Patiala, Punjab, 147004, India
| | - Anjali Giri
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Thapar Technology Campus, Bhadson Road, Patiala, Punjab, 147004, India
| | - Mily Bhattacharya
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Thapar Technology Campus, Bhadson Road, Patiala, Punjab, 147004, India.
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20
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Wang T, Richard CA, Dong X, Shi GH. Impact of Surfactants on the Functionality of Prefilled Syringes. J Pharm Sci 2020; 109:3413-3422. [PMID: 32771345 DOI: 10.1016/j.xphs.2020.07.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/24/2022]
Abstract
Previous studies revealed the impact of formulation factors (excipients and pH) on the functionality of prefilled syringes. Surfactant, a critical formulation component for therapeutic proteins and antibodies, aids in minimizing protein adsorption onto interfaces and reduces protein aggregation or particulate formation. This study evaluated the impact of different surfactants and protein concentration on the functionality of prefilled syringes. Syringes filled with solution formulations with different surfactants were stored at various temperatures and evaluated at selected time points. Upon thermal stress, polysorbate 80 and dodecyl-β-d-maltoside containing formulations showed significantly greater increase in glide force when compared with poloxamer 407 containing formulations. In contrast, syringes filled with poloxamer 188 containing formulations did not show any increase in glide force under the same conditions. Based on the results from this study, the increase in syringe glide force was inversely correlated with hydrophobic-lipophilic balance values and surface tension of different surfactants. The mechanism of increase in glide force was primarily the change of silicone oil coverage and lubricity in the barrel of syringes.
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Affiliation(s)
- Tingting Wang
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA.
| | - Coralie A Richard
- Delivery Device and Connected Solutions, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - Xia Dong
- Biotechnology Research (Bio TDR), Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - Galen Huaiqiu Shi
- Delivery Device and Connected Solutions, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA
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21
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Li Y, Lee JS. Insights into Characterization Methods and Biomedical Applications of Nanoparticle-Protein Corona. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3093. [PMID: 32664362 PMCID: PMC7412248 DOI: 10.3390/ma13143093] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/29/2020] [Accepted: 07/07/2020] [Indexed: 02/07/2023]
Abstract
Nanoparticles (NPs) exposed to a biological milieu will strongly interact with proteins, forming "coronas" on the surfaces of the NPs. The protein coronas (PCs) affect the properties of the NPs and provide a new biological identity to the particles in the biological environment. The characterization of NP-PC complexes has attracted enormous research attention, owing to the crucial effects of the properties of an NP-PC on its interactions with living systems, as well as the diverse applications of NP-PC complexes. The analysis of NP-PC complexes without a well-considered approach will inevitably lead to misunderstandings and inappropriate applications of NPs. This review introduces methods for the characterization of NP-PC complexes and investigates their recent applications in biomedicine. Furthermore, the review evaluates these characterization methods based on comprehensive critical views and provides future perspectives regarding the applications of NP-PC complexes.
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Affiliation(s)
| | - Jae-Seung Lee
- Department of Materials Science and Engineering, Korea University 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea;
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22
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Yang Y, He M, Wei T, Sun J, Wu S, Gao T, Guo Z. Photo-affinity pulling down of low-affinity binding proteins mediated by post-translational modifications. Anal Chim Acta 2020; 1107:164-171. [PMID: 32200891 DOI: 10.1016/j.aca.2020.02.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/14/2020] [Accepted: 02/06/2020] [Indexed: 11/19/2022]
Abstract
Weak and transient protein-protein interactions (PPIs) mediated by the post-translational modifications (PTMs) play key roles in biological systems. However, technical challenges to investigate the PTM-mediated PPIs have impeded many research advances. In this work, we develop a photo-affinity pull-down assay method to pull-down low-affinity binding proteins, thus for the screen of PTM-mediated PPIs. In this method, the PTM-mediated non-covalent interactions can be converted to the covalent interactions by the photo-activated linkage, so as to freeze frame the low-affinity binding interactions. The fabricated photo-affinity magnetic beads (PAMBs) ensure high specificity and resolution to capture the interacted proteins. Besides, the introduction of PEG passivation layer on PAMB has significantly reduced the non-specific interaction as compared to the traditional pull-down assay. For proof-of-concept, by using this newly developed assay method, we have identified a set of proteins that can interact with a specific methylation site on Flap Endonuclease 1 (FEN1) protein. Less interfering proteins (decreased over 80%) and more proteins sub-classes are profiled as compared to the traditional biotin-avidin pull-down system. Therefore, this new pull-down method may provide a useful tool for the study of low-affinity PPIs, and contribute to the discovery of potential targets for renewed PTM-mediated interactions that is fundamentally needed in biomedical research.
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Affiliation(s)
- Yang Yang
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, PR China
| | - Mengyuan He
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, PR China
| | - Tianxiang Wei
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China
| | - Junhua Sun
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, PR China
| | - Shaohua Wu
- Key Laboratory of Analytical Science for Food Safety and Biology (MOE & Fujian Province), College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Tao Gao
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, PR China.
| | - Zhigang Guo
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, PR China.
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23
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Fan Y, Fu F, Chen L, Li J, Zhang J. Surface Activity of Alkoxy Ethoxyethyl β-d-Glucopyranosides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2684-2695. [PMID: 32083874 DOI: 10.1021/acs.jafc.9b05966] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dioxyethene fragment (-(OCH2CH2)2-) was introduced into traditional alkyl β-d-glucopyranosides to ameliorate the water solubility, and eight nonionic surfactants, that is, alkoxy ethoxyethyl β-d-glucopyranosides with alkyl chain lengths (n = 6-16), were synthesized and characterized. Their hydrophilic and lipophilic balance number, water solubility, critical micelle concentration (cmc), γcmc, Γmax, and hygroscopic rate decreased with an increase in the alkyl chain length. Hexadecoxy ethoxyethyl β-d-glucopyranoside had no water solubility at 25 °C. Decoxy ethoxyethyl β-d-glucopyranoside had the best emulsifying property in the toluene/water and n-octane/water systems and the strongest foaming property, whereas dodecoxy ethoxyethyl β-d-glucopyranoside had the best emulsifying property in the rapeseed oil/water system. Such β-d-glucopyranosides (n = 6-12) exhibited excellent surface activity. In addition, for the binary mixture of alkoxy ethoxyethyl β-d-glucopyranosides (n = 8, 10, 12) and sodium dodecyl sulfate or cetyl trimethyl ammonium chloride, their cmc values were lower than the pure β-d-glucopyranosides, indicating that they had synergistic interactions. The fan focal conic textures of alkoxy ethoxyethyl β-d-glucopyranosides (n = 7-16) were observed during the cooling process under a polarizing optical microscope. Alkoxy ethoxyethyl β-d-glucopyranosides (n = 14, 16) had the related melting points and the clear points with differential scanning calorimetry. With β-d-glucopyranosides (n = 6-16) and n-butanol as the surfactant and cosurfactant, respectively, and with cyclohexane as the oil phase, the related microemulsion areas in their pseudoternary phase diagram system were investigated with the visual observation at 25 °C. Along with the slashing requirements of petroleum consumption, environmental protection, and green and sustainable development, nonionic sugar-based alkoxy ethoxyethyl β-d-glucopyranosides should be expected to have their potential practical application because of their strengthened hydrophilicity, improved water solubility, and enhanced surface activity.
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Affiliation(s)
- Yulin Fan
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Fang Fu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Langqiu Chen
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Jiping Li
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Jing Zhang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
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24
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Wagay TA, Ismail K, Askari H. Assessment of the aggregation and adsorption behavior of newly synthesized tetradecylpyridinium-based metallosurfactants and their interaction with bovine serum albumin. NEW J CHEM 2020. [DOI: 10.1039/d0nj02169e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tetradecylpyridinium (TP) based metallosurfactants, TP2[MCl4] (M = Mn, Co, Ni, Cu, Zn): synthesis, aggregation behavior and interaction with bovine serum albumin.
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Affiliation(s)
- Tariq Ahmad Wagay
- Department of Chemistry
- North-Eastern Hill University
- NEHU Campus
- Shillong – 793022
- India
| | - K. Ismail
- Department of Chemistry
- North-Eastern Hill University
- NEHU Campus
- Shillong – 793022
- India
| | - Hassan Askari
- Department of Chemistry
- North-Eastern Hill University
- NEHU Campus
- Shillong – 793022
- India
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25
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Kahya N, Erim FB. Surfactant modified alginate composite gels for controlled release of protein drug. Carbohydr Polym 2019; 224:115165. [PMID: 31472829 DOI: 10.1016/j.carbpol.2019.115165] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 07/20/2019] [Accepted: 08/02/2019] [Indexed: 01/24/2023]
Abstract
This study aims to modify alginate with sodium dodecyl sulfate (SDS) to reduce the release of oral protein in the acidic stomach environment and transport it to the colon medium. Bovine serum albumin (BSA), which was chosen as a model protein, was loaded into surfactant modified calcium alginate beads (SDS/Ca-Alg). The encapsulation efficiency of BSA in SDS/Ca-Alg beads was found significantly higher (96.3%) compared to that of beads without SDS. The most remarkable result is that protein release from the modified gel in the stomach environment was significantly reduced compared to protein release from the plain alginate gel. At the same time, the release time of the whole drug in the intestinal environment was significantly prolonged. The SDS-modified alginate beads are proposed as suitable carriers for the passage of orally taken protein-type drugs into the colon medium by preventing their degradation in acidic gastric fluid.
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Affiliation(s)
- Nilay Kahya
- Department of Chemistry, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - F Bedia Erim
- Department of Chemistry, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
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26
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Dong XB, Huang W, Bian YB, Feng X, Ibrahim SA, Shi DF, Qiao X, Liu Y. Remediation and Mechanisms of Cadmium Biosorption by a Cadmium-Binding Protein from Lentinula edodes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11373-11379. [PMID: 31539240 DOI: 10.1021/acs.jafc.9b04741] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cadmium bioremediation with metal-binding proteins is primarily conducted using metallothioneins (MTs). However, in the present study, we investigated a non-MT cadmium-binding protein from Lentinula edodes (LECBP) as a remediation tool for cadmium biosorption in Escherichia coli. The results indicated that the expression of LECBP significantly enhanced the cadmium biosorption capacity of transgenic E. coli. The secondary structure and conformation of LECBP were changed after binding with cadmium as evidenced by circular dichroism and fluorescence spectroscopy. The results of Fourier transform infrared spectroscopy indicated that carboxyl oxygen and amino nitrogen atoms were involved in the interaction between LECBP and cadmium. The results further demonstrated that glutamic acid and histidine residues are the potential binding sites. Our results have thus provided new insights into cadmium bioremediation in an aquatic environment.
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Affiliation(s)
| | | | | | - Xi Feng
- Department of Nutrition, Food Science and Packaging , California State University , San Jose , California 95192 , United States
| | - Salam A Ibrahim
- Department of Family and Consumer Sciences , North Carolina A&T State University , 171 Carver Hall , Greensboro , North Carolina 27411 , United States
| | - De-Fang Shi
- Research Institute of Agricultural Products Processing and Nuclear-Agricultural Technology , Hubei Academy of Agricultural Sciences , Wuhan , Hubei 430064 , China
| | - Xin Qiao
- College of Culinary and Food Engineering , Wuhan Business University , Wuhan , Hubei 430056 , China
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27
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Horn JM, Kapelner RA, Obermeyer AC. Macro- and Microphase Separated Protein-Polyelectrolyte Complexes: Design Parameters and Current Progress. Polymers (Basel) 2019; 11:E578. [PMID: 30960562 PMCID: PMC6523202 DOI: 10.3390/polym11040578] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/18/2019] [Accepted: 03/23/2019] [Indexed: 01/02/2023] Open
Abstract
Protein-containing polyelectrolyte complexes (PECs) are a diverse class of materials, composed of two or more oppositely charged polyelectrolytes that condense and phase separate near overall charge neutrality. Such phase-separation can take on a variety of morphologies from macrophase separated liquid condensates, to solid precipitates, to monodispersed spherical micelles. In this review, we present an overview of recent advances in protein-containing PECs, with an overall goal of defining relevant design parameters for macro- and microphase separated PECs. For both classes of PECs, the influence of protein characteristics, such as surface charge and patchiness, co-polyelectrolyte characteristics, such as charge density and structure, and overall solution characteristics, such as salt concentration and pH, are considered. After overall design features are established, potential applications in food processing, biosensing, drug delivery, and protein purification are discussed and recent characterization techniques for protein-containing PECs are highlighted.
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Affiliation(s)
- Justin M Horn
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | - Rachel A Kapelner
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | - Allie C Obermeyer
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
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