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Jang YH, Raspaud E, Lansac Y. DNA-protamine condensates under low salt conditions: molecular dynamics simulation with a simple coarse-grained model focusing on electrostatic interactions. NANOSCALE ADVANCES 2023; 5:4798-4808. [PMID: 37705794 PMCID: PMC10496769 DOI: 10.1039/d2na00847e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 08/14/2023] [Indexed: 09/15/2023]
Abstract
Protamine, a small, strongly positively-charged protein, plays a key role in achieving chromatin condensation inside sperm cells and is also involved in the formulation of nanoparticles for gene therapy and packaging of mRNA-based vaccines against viral infection and cancer. The detailed mechanisms of such condensations are still poorly understood especially under low salt conditions where electrostatic interaction predominates. Our previous study, with a refined coarse-grained model in full consideration of the long-range electrostatic interactions, has demonstrated the crucial role of electrostatic interaction in protamine-controlled reversible DNA condensation. Therefore, we herein pay our attention only to the electrostatic interaction and devise a coarser-grained bead-spring model representing the right linear charge density on protamine and DNA chains but treating other short-range interactions as simply as possible, which would be suitable for real-scale simulations. Effective pair potential calculations and large-scale molecular dynamics simulations using this extremely simple model reproduce the phase behaviour of DNA in a wide range of protamine concentrations under low salt conditions, again revealing the importance of the electrostatic interaction in this process and providing a detailed nanoscale picture of bundle formation mediated by a charge disproportionation mechanism. Our simulations also show that protamine length alters DNA overcharging and in turn redissolution thresholds of DNA condensates, revealing the important role played by entropies and correlated fluctuations of condensing agents and thus offering an additional opportunity to design tailored nanoparticles for gene therapy. The control mechanism of DNA-protamine condensates will also provide a better microscopic picture of biomolecular condensates, i.e., membraneless organelles arising from liquid-liquid phase separation, that are emerging as key principles of intracellular organization. Such condensates controlled by post-translational modification of protamine, in particular phosphorylation, or by variations in protamine length from species to species may also be responsible for the chromatin-nucleoplasm patterning observed during spermatogenesis in several vertebrate and invertebrate species.
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Affiliation(s)
- Yun Hee Jang
- GREMAN UMR 7347, Université de Tours, CNRS, INSA CVL 37200 Tours France
- Department of Energy Science and Engineering, DGIST Daegu 42988 Korea
- Laboratoire de Physique des Solides, CNRS UMR 8502, Université Paris-Saclay 91405 Orsay France
| | - Eric Raspaud
- Laboratoire de Physique des Solides, CNRS UMR 8502, Université Paris-Saclay 91405 Orsay France
| | - Yves Lansac
- GREMAN UMR 7347, Université de Tours, CNRS, INSA CVL 37200 Tours France
- Department of Energy Science and Engineering, DGIST Daegu 42988 Korea
- Laboratoire de Physique des Solides, CNRS UMR 8502, Université Paris-Saclay 91405 Orsay France
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2
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Grządka E, Matusiak J, Godek E, Maciołek U. Mixtures of cationic guar gum and anionic surfactants as stabilizers of zirconia suspensions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Vásárhelyi L, Hegedűs T, Sáringer S, Ballai G, Szilágyi I, Kónya Z. Stability of Boron Nitride Nanosphere Dispersions in the Presence of Polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5399-5407. [PMID: 33878269 PMCID: PMC8280764 DOI: 10.1021/acs.langmuir.1c00656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/31/2021] [Indexed: 11/29/2022]
Abstract
Boron nitride nanospheres (BNNSs) were functionalized with polyelectrolytes. The effect of the polyelectrolyte dose and ionic strength on the charging and aggregation properties was investigated. At appropriate polyelectrolyte doses, charge neutralization occurred, whereas by increasing the dose, charge reversal was observed. The complete coating of the particles was indicated by a plateau in the ζ-potential values, which do not change significantly beyond the dose corresponding to the onset of such a plateau. The dispersions were highly aggregated around the charge neutralization point, while at lower or higher doses, the particles were stable. The salt-induced aggregation experiments revealed that the polyelectrolyte coatings contribute to the colloidal stability of the particles, namely, the critical coagulation concentrations deviated from the one determined for bare BNNSs. The presence of electrostatic and steric interparticle forces induced by the adsorbed polyelectrolyte chains was assumed. The obtained results confirm that the comprehensive investigation of the colloidal stability of BNNS particles is crucial to design stable or unstable dispersions and that polyelectrolytes are suitable agents for both stabilization and destabilization of BNNS dispersions, depending on the purpose of their application.
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Affiliation(s)
- Lívia Vásárhelyi
- Interdisciplinary
Excellence Center, Department of Applied and Environmental Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - Tímea Hegedűs
- Interdisciplinary
Excellence Center, Department of Applied and Environmental Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - Szilárd Sáringer
- MTA-SZTE
Lendület Biocolloids Research Group, Interdisciplinary Excellence
Center, Department of Physical Chemistry and Materials Science, University of Szeged, Szeged H-6720, Hungary
| | - Gergő Ballai
- Interdisciplinary
Excellence Center, Department of Applied and Environmental Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - István Szilágyi
- MTA-SZTE
Lendület Biocolloids Research Group, Interdisciplinary Excellence
Center, Department of Physical Chemistry and Materials Science, University of Szeged, Szeged H-6720, Hungary
| | - Zoltán Kónya
- Interdisciplinary
Excellence Center, Department of Applied and Environmental Chemistry, University of Szeged, Szeged H-6720, Hungary
- MTA-SZTE
Reaction Kinetics and Surface Chemistry Research Group, Szeged H-6720, Hungary
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Szerlauth A, Muráth S, Szilagyi I. Layered double hydroxide-based antioxidant dispersions with high colloidal and functional stability. SOFT MATTER 2020; 16:10518-10527. [PMID: 33073831 DOI: 10.1039/d0sm01531h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Highly stable antioxidant dispersions were designed on the basis of ring-opened ellagic acid (EA) intercalated into MgAl-layered double hydroxide (LDH) nanoparticles. The morphology of the composite was delicately modified with ethanolic washing to obtain EtOH-EA-LDH with a high specific surface area. The colloidal stability was optimized by surface functionalization with positively charged polyelectrolytes. Polyethyleneimine (PEI), protamine sulfate (PS) and poly(acrylamide-co-diallyl dimethyl ammonium chloride) (PAAm-co-DADMAC) was adsorbed onto the surface of the oppositely charged EtOH-EA-LDH leading to charge neutralization and overcharging at appropriate doses. Formation of adsorbed polyelectrolyte layers provided remarkable colloidal stability for the EtOH-EA-LDH. Modification with PEI and PAAm-co-DADMAC outstandingly improved the resistance of the particles against salt-induced aggregation with a critical coagulation concentration value above 1 M, while only limited stability was achieved by covering the nanoparticles with PS. The high antioxidant activity of EtOH-EA-LDH was greatly preserved upon polyelectrolyte coating, which was proved in the scavenging of radicals in the test reaction applied. Hence, an active antioxidant nanocomposite of high drug dose and remarkable colloidal stability was obtained to combat oxidative stress in systems of high electrolyte concentrations.
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Affiliation(s)
- Adél Szerlauth
- MTA-SZTE Lendület Biocolloids Research Group, Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, 1 Rerrich Béla tér, H-6720 Szeged, Hungary.
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Jiang YW, Gao G, Jia HR, Zhang X, Cheng X, Wang HY, Liu P, Wu FG. Palladium Nanosheets as Safe Radiosensitizers for Radiotherapy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11637-11644. [PMID: 32902987 DOI: 10.1021/acs.langmuir.0c02316] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Many noble metal-based nanoparticles have emerged for applications in cancer radiotherapy in recent years, but few investigations have been carried out for palladium nanoparticles. Herein, palladium nanosheets (Pd NSs), which possess a sheetlike morphology with a diameter of ∼14 nm and a thickness of ∼2 nm, were utilized as a sensitizer to improve the performance of radiotherapy. It was found that Pd NSs alone did not decrease the cell viability after treatment for as long as 130 h, suggesting the excellent cytocompatibility of the nanoagents. However, the viability of cancer cells treated with X-ray irradiation became lower, and the viability became even lower if the cells were co-treated with X-ray and Pd NSs, indicating the radiosensitization effect of Pd NSs. Additionally, compared with X-ray irradiation, the combined treatment of Pd NSs and X-ray irradiation induced the generation of more DNA double-stranded breaks and reactive oxygen species within cancer cells, which eventually caused elevated cell apoptosis. Moreover, in vivo experiments also verified the radiosensitization effect and the favorable biocompatibility of Pd NSs, indicating their potential for acquiring satisfactory in vivo radiotherapeutic effect at lower X-ray doses. It is believed that the present research will open new avenues for the application of noble metal-based nanoparticles in radiosensitization.
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Affiliation(s)
- Yao-Wen Jiang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Ge Gao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Hao-Ran Jia
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Xiaodong Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Xiaotong Cheng
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Hong-Yin Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Peidang Liu
- Institute of Neurobiology, School of Medicine, Southeast University, Nanjing 210096, P. R. China
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
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Katana B, Rouster P, Varga G, Muráth S, Glinel K, Jonas AM, Szilagyi I. Self-Assembly of Protamine Biomacromolecule on Halloysite Nanotubes for Immobilization of Superoxide Dismutase Enzyme. ACS APPLIED BIO MATERIALS 2019; 3:522-530. [DOI: 10.1021/acsabm.9b00953] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Bojana Katana
- MTA-SZTE Lendület Biocolloids Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - Paul Rouster
- Institute of Condensed Matter and Nanosciences - Bio and Soft Matter, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Gábor Varga
- Department of Organic Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Szabolcs Muráth
- MTA-SZTE Lendület Biocolloids Research Group, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Center, Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
| | - Karine Glinel
- Institute of Condensed Matter and Nanosciences - Bio and Soft Matter, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Alain M. Jonas
- Institute of Condensed Matter and Nanosciences - Bio and Soft Matter, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Istvan Szilagyi
- MTA-SZTE Lendület Biocolloids Research Group, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Center, Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
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Sáringer S, Rouster P, Szilágyi I. Regulation of the Stability of Titania Nanosheet Dispersions with Oppositely and Like-Charged Polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4986-4994. [PMID: 30888825 DOI: 10.1021/acs.langmuir.9b00242] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Charging and aggregation processes of titania nanosheets (TNS) were extensively studied in the presence of oppositely charged or like-charged polyelectrolytes in aqueous dispersions. The surface charge of the TNS was systematically varied by the pH; therefore, positive nanosheets were obtained at pH 4 and negative ones at pH 10. Strong adsorption of poly(styrene sulfonate) (PSS) of high negative line charge density on the TNS was observed at pH 4, leading to charge neutralization and reversal of the original sign of charge of the nanosheets. The adsorption of like-charged poly(diallyldimethylammonium chloride) (PDADMAC) was also feasible through a hydrophobic interaction. The predominating interparticle forces were mainly of the DLVO-type, but additional patch-charge attraction also took place in the case of PSS at low surface coverage. The TNS was found to be hydrophilic at pH 10 and no adsorption of like-charged PSS was possible because of strong electrostatic repulsion between the polyelectrolyte and the surface. The PDADMAC showed high affinity to the oppositely charged TNS surface in alkaline dispersions, giving rise to neutral and positively charged nanosheets at appropriate polyelectrolyte doses. Formation of a saturated PDADMAC layer on the TNS led to high resistance against salt-induced aggregation through the electrosteric stabilization mechanism. These results shed light on the importance of polyelectrolyte concentration, ionic strength, and charge balance on the colloidal stability of TNS, which is especially important in applications, where the nanosheets are dispersed in complex solution containing polymeric compounds and electrolytes.
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Affiliation(s)
| | - Paul Rouster
- Institute of Condensed Matter and Nanosciences-Bio and Soft Matter , Université Catholique de Louvain , B-1348 Louvain-la-Neuve , Belgium
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Alvarez-Figueroa MJ, Abarca-Riquelme JM, González-Aramundiz JV. Influence of protamine shell on nanoemulsions as a carrier for cyclosporine-A skin delivery. Pharm Dev Technol 2018; 24:630-638. [DOI: 10.1080/10837450.2018.1550789] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - José María Abarca-Riquelme
- Departamento de Farmacia, Facultad de Química, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - José Vicente González-Aramundiz
- Departamento de Farmacia, Facultad de Química, Pontificia Universidad Católica de Chile, Santiago, Chile
- Centro de Investigación en Nanotecnología y Materiales Avanzados “CIEN-UC”, Pontificia Universidad Católica de Chile, Santiago, Chile
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9
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Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids. COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2030032] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Titanium oxide particles of various morphologies have been prepared for applications of scientific or industrial interest in recent decades. Besides development of novel synthetic routes and solid-state characterization of the obtained particles, colloidal stability of titanium oxide dispersions was the focus of numerous research groups due to the high importance of this topic in applications in heterogeneous systems. The influence of dissolved ionic compounds, including monovalent salts, multivalent ions and polyelectrolytes, on the charging and aggregation behaviour of titanium oxide materials of spherical and elongated structures will be discussed in the present review.
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Terenteva EA, Apyari VV, Dmitrienko SG, Garshev AV, Volkov PA, Zolotov YA. Determination of pyrophosphate and sulfate using polyhexamethylene guanidine hydrochloride-stabilized silver nanoparticles. Talanta 2017; 180:346-351. [PMID: 29332821 DOI: 10.1016/j.talanta.2017.12.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/18/2017] [Accepted: 12/22/2017] [Indexed: 01/18/2023]
Abstract
Positively charged polyhexamethylene guanidine hydrochloride-stabilized silver nanoparticles (PHMG-AgNPs) were prepared and applied as a colorimetric probe for single-step determination of pyrophosphate and sulfate. The approach is based on the nanoparticles aggregation leading to change in their absorption spectra and color of the solution. Due to both electrostatic and steric stabilization these nanoparticles show decreased sensitivity relatively to many common anions, which allows for simple and rapid direct single-step determination of pyrophosphate and sulfate. Effects of different factors (time of interaction, pH, concentrations of anions and the nanoparticles) on aggregation of PHMG-AgNPs and analytical performance of the procedure were investigated. The method allows for the determination of pyrophosphate and sulfate in the range of 0.16-2μgmL-1 and 20-80μgmL-1 with RSD of 2-5%, respectively. The analysis can be performed using either spectrophotometry or naked-eye detection. Practical application of the method was shown by the example of pyrophosphate determination in baking powder sample.
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Affiliation(s)
- E A Terenteva
- Lomonosov Moscow State University, Chemistry Department, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - V V Apyari
- Lomonosov Moscow State University, Chemistry Department, Leninskie Gory 1/3, 119991 Moscow, Russia.
| | - S G Dmitrienko
- Lomonosov Moscow State University, Chemistry Department, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - A V Garshev
- Lomonosov Moscow State University, Chemistry Department, Leninskie Gory 1/3, 119991 Moscow, Russia; Lomonosov Moscow State University, Department of Materials Science, Leninskie Gory 1/73, 119991 Moscow, Russia
| | - P A Volkov
- State Scientific-Research Institute of Chemical Reagents and Special Purity Chemical Substances, Bogorodsky Shaft, 3, 107076 Moscow, Russia
| | - Yu A Zolotov
- Lomonosov Moscow State University, Chemistry Department, Leninskie Gory 1/3, 119991 Moscow, Russia; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninsky Prospect, 31, 119991 Moscow, Russia
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Rouster P, Pavlovic M, Szilagyi I. Immobilization of Superoxide Dismutase on Polyelectrolyte-Functionalized Titania Nanosheets. Chembiochem 2017; 19:404-410. [DOI: 10.1002/cbic.201700502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Paul Rouster
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Marko Pavlovic
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Istvan Szilagyi
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
- MTA-SZTE Lendület Biocolloids Research Group; Department of Physical Chemistry and Materials Science; University of Szeged; 1 Aradi vértanúk tere 6720 Szeged Hungary
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