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Smirnov MA, Tolmachev DA, Glova AD, Sokolova MP, Geydt PV, Lukasheva NV, Lyulin SV. Combined Use of Atomic Force Microscopy and Molecular Dynamics in the Study of Biopolymer Systems. POLYMER SCIENCE SERIES C 2021. [DOI: 10.1134/s1811238221020089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Glova AD, Melnikova SD, Mercurieva AA, Larin SV, Nazarychev VM, Polotsky AA, Lyulin SV. Branched versus linear lactide chains for cellulose nanoparticle modification: an atomistic molecular dynamics study. Phys Chem Chem Phys 2021; 23:457-469. [PMID: 33320128 DOI: 10.1039/d0cp04556j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We studied the structure of brushes consisting of branched oligolactide (OLA) chains grafted onto the surface of cellulose nanoparticles (CNPs) in polylactide (PLA) and compared the outcomes to the case of grafting linear OLA chains using atomistic molecular dynamics simulations. The systems were considered in a melt state. The branched model OLA chains comprised one branching point and three branches, while the linear OLA chains examined had a molecular weight similar to the branched chains. It was shown that free branches of the branched OLA chains tend to fold back toward the CNPs due to dipole-dipole interactions within the grafted layer, in contrast to the well-established behavior of the grafted uncharged branched chains. This result, however, is in qualitative agreement with the conformational behavior known for linear OLA chains. At the same time, no significant difference in the effectiveness of covering the filler surface with grafted branched or linear OLA chains was found. In terms of the expelling ability of the grafted chains and the interaction between PLA and CNP or OLA, the linear chains were broadly similar (sparse grafting) or better (intermediate or dense grafting) compared to the branched ones. Thus, the grafted lactide chains with a linear architecture, rather than their branched counterpart, may be preferable for the covalent modification of cellulose nanoparticles.
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Affiliation(s)
- Artyom D Glova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoj pr. 31 (V.O.), St. Petersburg 199004, Russia.
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Macroporous bacterial cellulose grafted by oligopeptides induces biomimetic mineralization via interfacial wettability. Colloids Surf B Biointerfaces 2019; 183:110457. [PMID: 31476688 DOI: 10.1016/j.colsurfb.2019.110457] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/29/2019] [Accepted: 08/24/2019] [Indexed: 11/20/2022]
Abstract
Bacterial cellulose (BC) has a role in tissue repair and regenerative medicine, which has already attracted tremendous interest from researchers, especially those working in the field of hybrid materials. Herein, we designed BC-based macroporous functional materials by dialdehyde bacterial cellulose (DBC) cross-linking with oligopeptides under mild reactive conditions. The interfacial properties of the surface modified BC were examined by biomimetic mineralization. The results showed that a macroporous structure was achieved by using oligopeptides as chemical cross-linking agents with an interconnected macroporosity ranging from 20 μm to 80 μm. Their mechanical properties were barely altered compared to the pristine BC. Their enhanced surface charges stemmed from the carboxyl groups of the oligopeptides engaging in reactions with amine and aldehyde groups. The oligopeptides cross-linked DBC showed a faster initial induction towards minerals via interfacial wettability resulting in promotion of mineralization, the hybrid materials had excellent biocompatibility relative to the pristine BC. These findings are vital to the development of other biopolymers with essential macroporous structures as well as improved interfacial wettability, which enables their possible uses in tissue repair and regenerative medicine.
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Fragal EH, Cellet TS, Fragal VH, Witt MA, Companhoni MV, Ueda-Nakamura T, Silva R, Rubira AF. Biomimetic nanocomposite based on hydroxyapatite mineralization over chemically modified cellulose nanowhiskers: An active platform for osteoblast proliferation. Int J Biol Macromol 2019; 125:133-142. [DOI: 10.1016/j.ijbiomac.2018.12.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/26/2018] [Accepted: 12/01/2018] [Indexed: 12/25/2022]
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Kostritskii AY, Tolmachev DA, Lukasheva NV, Gurtovenko AA. Molecular-Level Insight into the Interaction of Phospholipid Bilayers with Cellulose. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12793-12803. [PMID: 29040801 DOI: 10.1021/acs.langmuir.7b02297] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Molecular-level insight into the interactions of phospholipid molecules with cellulose is crucial for the development of novel cellulose-based materials for wound dressing. Here we employ the state-of-the-art computer simulations to unlock for the first time the molecular mechanisms behind such interactions. To this end, we performed a series of atomic-scale molecular dynamics simulations of phospholipid bilayers on a crystalline cellulose support at various hydration levels of the bilayer leaflets next to the cellulose surface. Our findings clearly demonstrate the existence of strong interactions between polar lipid head groups and the hydrophilic surface of a cellulose crystal. We identified two major types of interactions between phospholipid molecules and cellulose chains: (i) direct attractive interactions between lipid choline groups and oxygens of hydroxyl (hydroxymethyl) groups of cellulose and (ii) hydrogen bonding between phosphate groups of lipids and cellulose's hydroxymethyl/hydroxyl groups. When the hydration level of the interfacial bilayer/support region is low, these interactions lead to a pronounced asymmetry in the properties of the opposite bilayer leaflets. In particular, the mass density profiles of the proximal leaflets are split into two peaks and lipid head groups become more horizontally oriented with respect to the bilayer surface. Furthermore, the lateral mobility of lipids in the leaflets next to the cellulose surface is found to slow down considerably. Most of these cellulose-induced effects are likely due to hydrogen bonding between lipid phosphate groups and hydroxymethyl/hydroxyl groups of cellulose: the lipid phosphate groups are pulled toward the water/lipid interface due to the formation of hydrogen bonds. Overall, our findings shed light on the molecular details of the interactions between phospholipid bilayers and cellulose nanocrystals and can be used for identifying possible strategies for improving the properties of cellulose-based dressing materials via, e.g., chemical modification of their surface.
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Affiliation(s)
- Andrei Yu Kostritskii
- Faculty of Physics, St. Petersburg State University , Ulyanovskaya str. 3, Petrodvorets, St. Petersburg, 198504 Russia
| | - Dmitry A Tolmachev
- Institute of Macromolecular Compounds, Russian Academy of Sciences , Bolshoi Prospect V.O.31, St. Petersburg, 199004 Russia
| | - Natalia V Lukasheva
- Institute of Macromolecular Compounds, Russian Academy of Sciences , Bolshoi Prospect V.O.31, St. Petersburg, 199004 Russia
| | - Andrey A Gurtovenko
- Institute of Macromolecular Compounds, Russian Academy of Sciences , Bolshoi Prospect V.O.31, St. Petersburg, 199004 Russia
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Glova AD, Larin SV, Falkovich SG, Nazarychev VM, Tolmachev DA, Lukasheva NV, Lyulin SV. Molecular dynamics simulations of oligoester brushes: the origin of unusual conformations. SOFT MATTER 2017; 13:6627-6638. [PMID: 28926071 DOI: 10.1039/c7sm01419h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present results from all-atom molecular dynamics simulations for the structural properties of oligomeric lactic acid chains (OLA) grafted to the surface of cellulose nanocrystals (CNCs) and immersed in the melt of polylactic acid (PLA). Earlier, we have found that the distribution of free ends of OLA molecules is bimodal [Glova et al., Polym. Int., 2016, 65(8), 892]. The results cannot be explained within the standard picture of uncharged polymer brushes exposed to the melt of a chemically identical polymer. Although the oligomeric brushes of the OLA chains are uncharged, they have partial polarization charges producing a non-zero dipole moment of the monomeric chain unit. We study the influence of partial charges on the structure of the layer of OLA chains grafted to the CNC surface. A detailed analysis of the conformations of the grafted chains shows that interaction of partial charges in the models causes bending of the OLA molecules toward the cellulose surface, forming a hairpin structure. The observed separation of the grafted chains into two populations increases with grafting density. We demonstrate that hydrogen bonds can be formed between the free ends of the grafted chains and the CNC surface, but they do not affect the brush structure significantly. Thus, dipole-dipole interactions turn out to be the key factor governing the unusual conformations of grafts.
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Affiliation(s)
- A D Glova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoj pr. V.O., 31, 199004 Saint Petersburg, Russia.
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Water-Soluble Cellulose Derivatives Are Sustainable Additives for Biomimetic Calcium Phosphate Mineralization. INORGANICS 2016. [DOI: 10.3390/inorganics4040033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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Glova AD, Falkovich SG, Larin SV, Mezhenskaia DA, Lukasheva NV, Nazarychev VM, Tolmachev DA, Mercurieva AA, Kenny JM, Lyulin SV. Poly(lactic acid)-based nanocomposites filled with cellulose nanocrystals with modified surface: all-atom molecular dynamics simulations. POLYM INT 2016. [DOI: 10.1002/pi.5102] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Artem D Glova
- St Petersburg State University, Universitetskaya nab. 7-9; St Petersburg 199034 Russian Federation
| | - Stanislav G Falkovich
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
| | - Sergey V Larin
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
| | - Daria A Mezhenskaia
- St Petersburg Polytechnic State University; Grazhdansky pr. 28 Saint Petersburg 195220 Russian Federation
| | - Natalia V Lukasheva
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
| | - Victor M Nazarychev
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
| | - Dmitrii A Tolmachev
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
| | - Anna A Mercurieva
- St Petersburg State University, Universitetskaya nab. 7-9; St Petersburg 199034 Russian Federation
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
| | - José M Kenny
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
- Materials Engineering Centre, UdR INSTM, NIPLAB; University of Perugia; di Pentima 4 05100 Terni Italy
| | - Sergey V Lyulin
- St Petersburg State University, Universitetskaya nab. 7-9; St Petersburg 199034 Russian Federation
- Institute of Macromolecular Compounds, Russian Academy of Sciences; Bolshoj pr. 31 St Petersburg 199004 Russian Federation
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Surface adsorption and self-assembly of Cu(II) ions on TEMPO-oxidized cellulose nanofibers in aqueous media. J Colloid Interface Sci 2016; 464:175-82. [DOI: 10.1016/j.jcis.2015.11.033] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/16/2015] [Accepted: 11/17/2015] [Indexed: 12/26/2022]
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Lukasheva NV, Tolmachev DA. Cellulose Nanofibrils and Mechanism of their Mineralization in Biomimetic Synthesis of Hydroxyapatite/Native Bacterial Cellulose Nanocomposites: Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:125-134. [PMID: 26652774 DOI: 10.1021/acs.langmuir.5b03953] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Molecular dynamics (MD) simulation of a nanofibril of native bacterial cellulose (BC) in solutions of mineral ions is presented. The supersaturated calcium-phosphate (CP) solution with the ionic composition of hydroxyapatite and CaCl2 solutions with the concentrations below, equal to, and above the solubility limits are simulated. The influence of solvation models (TIP3P and TIP4P-ew water models) on structural characteristics of the simulated nanofibril and on the crystal nucleation process is assessed. The structural characteristics of cellulose nanofibrils (in particular, of the surface layer) are found to be nearly independent of the solvation models used in the simulation and on the presence of ions in the solutions. It is shown that ionic clusters are formed in the solution rather than on the fibril surface. The cluster sizes are slightly different for the two water models. The effect of the ion-ion interaction parameters on the results is discussed. The main conclusion is that the activity of hydroxyl groups on the BC fibril surface is not high enough to cause adsorption of Ca(2+) ions from the solution. Therefore, the nucleation of CP crystals takes place initially in solution, and then the crystallites formed can be adsorbed on BC nanofibril surfaces.
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Affiliation(s)
- N V Lukasheva
- Institute of Macromolecular Compounds, Russian Academy of Sciences , Bol'shoi pr. 31, St. Petersburg, 199004 Russia
| | - D A Tolmachev
- Institute of Macromolecular Compounds, Russian Academy of Sciences , Bol'shoi pr. 31, St. Petersburg, 199004 Russia
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Luo H, Xiong G, Zhang C, Li D, Zhu Y, Guo R, Wan Y. Surface controlled calcium phosphate formation on three-dimensional bacterial cellulose-based nanofibers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:526-533. [PMID: 25686980 DOI: 10.1016/j.msec.2015.01.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 12/21/2014] [Accepted: 01/14/2015] [Indexed: 11/19/2022]
Abstract
Studies on the early calcium phosphate (Ca-P) formation on nanosized substrates may allow us to understand the biomineralization mechanisms at the molecular level. In this work, in situ formation of Ca-P minerals on bacterial cellulose (BC)-based nanofibers was investigated, for the first time, using the X-ray absorption near-edge structure (XANES) spectroscopy. In addition, the influence of the surface coating of nanofibers on the formation of Ca-P minerals was determined. Combined with XRD analysis, XANES results revealed that the nascent precursor was ACP (amorphous calcium phosphate) which was converted to TCP (β-tricalcium phosphate), then OCP (octacalcium phosphate), and finally to HAP (hydroxyapatite) when phosphorylated BC nanofibers were the templates. However, the formation of nascent precursor and its transformation process varied depending on the nature of the coating material on nanofibrous templates. These results provide new insights into basic mechanisms of mineralization and can lead to the development of novel bioinspired nanostructured materials.
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Affiliation(s)
- Honglin Luo
- School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China
| | - Guangyao Xiong
- School of Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, PR China
| | - Chen Zhang
- School of Optometry and Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin 300384, PR China
| | - Deying Li
- School of Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, PR China
| | - Yong Zhu
- School of Chemical Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China
| | - Ruisong Guo
- School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China
| | - Yizao Wan
- School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China.
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Lai C, Zhang SJ, Wang LQ, Sheng LY, Zhou QZ, Xi TF. The relationship between microstructure and in vivo degradation of modified bacterial cellulose sponges. J Mater Chem B 2015; 3:9001-9010. [DOI: 10.1039/c5tb01640a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction between the nanofibers of bacterial cellulose and hydroxyapatite has an extensive influence on the microstructure and the macroscopic properties of this type of composite, but the structural anisotropy and the speed of granulation ingrowth are strongly interdependent.
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Affiliation(s)
- C. Lai
- Shenzhen Key Laboratory of Human Tissue Regeneration and Repair
- Shenzhen Institute
- Peking University
- Shenzhen 518057
- China
| | - S. J. Zhang
- Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials
- The First Affiliated Hospital of Guangzhou Medical University
- Guangzhou 510120
- China
| | - L. Q. Wang
- Shenzhen Key Laboratory of Human Tissue Regeneration and Repair
- Shenzhen Institute
- Peking University
- Shenzhen 518057
- China
| | - L. Y. Sheng
- Shenzhen Key Laboratory of Human Tissue Regeneration and Repair
- Shenzhen Institute
- Peking University
- Shenzhen 518057
- China
| | - Q. Z. Zhou
- Shenzhen Key Laboratory of Human Tissue Regeneration and Repair
- Shenzhen Institute
- Peking University
- Shenzhen 518057
- China
| | - T. F. Xi
- Shenzhen Key Laboratory of Human Tissue Regeneration and Repair
- Shenzhen Institute
- Peking University
- Shenzhen 518057
- China
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Tolmachev DA, Lukasheva NV. Study of the process of mineralization of nanofibrils of native bacterial cellulose in solutions of mineral ions: Modeling via the method of molecular dynamics. POLYMER SCIENCE SERIES A 2014. [DOI: 10.1134/s0965545x14040166] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Silvestre AJD, Freire CSR, Neto CP. Do bacterial cellulose membranes have potential in drug-delivery systems? Expert Opin Drug Deliv 2014; 11:1113-24. [PMID: 24847913 DOI: 10.1517/17425247.2014.920819] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
INTRODUCTION Bacterial cellulose (BC) is an extremely pure form of cellulose, which, due to its unique properties, such as high purity, water-holding capacity, three-dimensional nanofibrilar network, mechanical strength, biodegradability and biocompatibility, shows a high potential as nanomaterial in a wide range of high-tech domains including biomedical applications, and most notably in controlled drug-delivery systems. AREAS COVERED This appraisal is intended to cover the major characteristics of BC, followed by the key aspects of BC production both in static and agitated conditions, and a glance of the major applications of BC, giving some emphasis to biomedical applications. Finally, a detailed discussion of the different applications of BC in controlled drug-delivery systems will be put forward, with focus on topical and oral drug-delivery systems, using either native BC or composite materials thereof. EXPERT OPINION The limited number of studies carried out so far demonstrated that BC, or materials prepared from it, are interesting materials for drug-delivery systems. There is, however, a large field of systematic research ahead to develop new and more selectively responsive materials and eventually to conjugate them with other biomedical applications of BC under development.
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Affiliation(s)
- Armando J D Silvestre
- University of Aveiro, CICECO and Department of Chemistry , 3810-193 Aveiro , Portugal +351 234 370 711 ;
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Khayrullin AR, Severin AV, Khripunov AK, Tkachenko AA, Pautov VD. Composites based on Gluconacetobacter xylinus bacterial cellulose and calcium phosphates and their dielectric properties. RUSS J APPL CHEM+ 2013. [DOI: 10.1134/s1070427213080247] [Citation(s) in RCA: 5] [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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