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Bokatyi AN, Dubashynskaya NV, Skorik YA. Chemical modification of hyaluronic acid as a strategy for the development of advanced drug delivery systems. Carbohydr Polym 2024; 337:122145. [PMID: 38710553 DOI: 10.1016/j.carbpol.2024.122145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/28/2024] [Accepted: 04/08/2024] [Indexed: 05/08/2024]
Abstract
Hyaluronic acid (HA) has emerged as a promising biopolymer for various biomedical applications due to its biocompatibility, biodegradability, and intrinsic ability to interact with cell surface receptors, making it an attractive candidate for drug delivery systems and tissue engineering. Chemical modification of HA has opened up versatile possibilities to tailor its properties, enabling the development of advanced drug delivery systems and biomaterials with enhanced functionalities and targeted applications. This review analyzes the strategies and applications of chemically modified HA in the field of drug delivery and biomaterial development. The first part of the review focuses on the different methods and functional groups used for the chemical modification of HA, highlighting the impact of these modifications on its physicochemical properties, degradation behavior and interactions with drugs. The second part of the review evaluates the use of chemically modified HA in the development of advanced biomedical materials including nano- and microparticles, hydrogels and mucoadhesive materials with tailored drug release profiles, site-specific targeting and stimuli-responsive behavior. Thus, the review consolidates the current advances and future perspectives in the field of chemical modification of HA, underscoring its immense potential to drive the development of advanced drug delivery systems and biomaterials with diverse biomedical applications.
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Affiliation(s)
- Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation.
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Dubashynskaya NV, Bokatyi AN, Sall TS, Egorova TS, Demyanova EV, Dubrovskii YA, Murashko EA, Anufrikov YA, Shasherina AY, Vlasova EN, Skorik YA. Hyaluronan/B12-chitosan polyelectrolyte complex for oral colistin administration. Int J Biol Macromol 2024; 263:130177. [PMID: 38360229 DOI: 10.1016/j.ijbiomac.2024.130177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/25/2024] [Accepted: 02/12/2024] [Indexed: 02/17/2024]
Abstract
Polyelectrolyte complexes (PECs) based on polysaccharides, including hyaluronic acid (HA) and chitosan (CS), are promising delivery systems for antimicrobial agents, including oral administration of the peptide antibiotic colistin (CT). Modification of CS with different targeting ligands to improve intestinal permeability is a suitable way to improve the oral bioavailability of polyelectrolyte particles. This study describes the procedure for obtaining CT-containing PECs based on HA and CS modified with cyanocobalamin (vitamin B12). In this case, vitamin B12 is used as a targeting ligand because it is absorbed in the ileum via specific transporter proteins. The resulting PECs had a hydrodynamic size of about 284 nm and a positive ζ-potential of about 26 mV; the encapsulation efficiency was 88.2 % and the CT content was 42.2 μg/mg. The developed systems provided a two-phase drug release: about 50 % of the CT was released in 0.5-1 h, and about 60 % of the antibiotic was cumulatively released in 5 h. The antimicrobial activity of encapsulated CT was maintained at the same level as the pure drug for at least 24 h (minimum inhibitory concentration against Pseudomonas aeruginosa was 2 μg/mL for both). In addition, the apparent permeability coefficient of CT in the PEC formulation was 2.4 × 10-6 cm/s. Thus, the incorporation of CT into HA- and vitamin B12-modified CS-based PECs can be considered as a simple and convenient method to improve the oral delivery of CT.
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Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Tatiana S Sall
- Institute of Experimental Medicine, Acad. Pavlov St. 12, Saint Petersburg 197376, Russia
| | - Tatiana S Egorova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russia
| | - Elena V Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russia
| | - Yaroslav A Dubrovskii
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Ekaterina A Murashko
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Yuri A Anufrikov
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, 198504 St. Petersburg, Russia
| | - Anna Y Shasherina
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, 198504 St. Petersburg, Russia
| | - Elena N Vlasova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia.
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Skorik YA. Biopolymers in Drug and Gene Delivery Systems 2.0. Int J Mol Sci 2023; 24:17099. [PMID: 38069419 PMCID: PMC10707005 DOI: 10.3390/ijms242317099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 12/01/2023] [Indexed: 12/18/2023] Open
Abstract
In recent years, significant progress has been made in the design and development of biopolymer-based delivery systems for a wide range of applications, including cancer therapy, gene editing, regenerative medicine, and vaccine delivery [...].
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Affiliation(s)
- Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
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Dubashynskaya NV, Bokatyi AN, Trulioff AS, Rubinstein AA, Kudryavtsev IV, Skorik YA. Development and Bioactivity of Zinc Sulfate Cross-Linked Polysaccharide Delivery System of Dexamethasone Phosphate. Pharmaceutics 2023; 15:2396. [PMID: 37896156 PMCID: PMC10610283 DOI: 10.3390/pharmaceutics15102396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
Improving the biopharmaceutical properties of glucocorticoids (increasing local bioavailability and reducing systemic toxicity) is an important challenge. The aim of this study was to develop a dexamethasone phosphate (DexP) delivery system based on hyaluronic acid (HA) and a water-soluble cationic chitosan derivative, diethylaminoethyl chitosan (DEAECS). The DexP delivery system was a polyelectrolyte complex (PEC) resulting from interpolymer interactions between the HA polyanion and the DEAECS polycation with simultaneous incorporation of zinc ions as a cross-linking agent into the complex. The developed PECs had a hydrodynamic diameter of 244 nm and a ζ-potential of +24.4 mV; the encapsulation efficiency and DexP content were 75.6% and 45.4 μg/mg, respectively. The designed DexP delivery systems were characterized by both excellent mucoadhesion and prolonged drug release (approximately 70% of DexP was released within 10 h). In vitro experiments showed that encapsulation of DexP in polysaccharide nanocarriers did not reduce its anti-inflammatory activity compared to free DexP.
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Affiliation(s)
- Natallia V. Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 Saint Petersburg, Russia; (A.N.B.); (Y.A.S.)
| | - Anton N. Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 Saint Petersburg, Russia; (A.N.B.); (Y.A.S.)
| | - Andrey S. Trulioff
- Institute of Experimental Medicine, Acad. Pavlov St. 12, 197376 Saint Petersburg, Russia; (A.S.T.); (A.A.R.); (I.V.K.)
| | - Artem A. Rubinstein
- Institute of Experimental Medicine, Acad. Pavlov St. 12, 197376 Saint Petersburg, Russia; (A.S.T.); (A.A.R.); (I.V.K.)
| | - Igor V. Kudryavtsev
- Institute of Experimental Medicine, Acad. Pavlov St. 12, 197376 Saint Petersburg, Russia; (A.S.T.); (A.A.R.); (I.V.K.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 Saint Petersburg, Russia; (A.N.B.); (Y.A.S.)
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Abstract
Recent years have seen remarkable advances in the field of drug and gene delivery systems, revolutionizing the way we approach therapeutic treatments [...].
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Affiliation(s)
- Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
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Dubashynskaya NV, Bokatyi AN, Sall TS, Egorova TS, Nashchekina YA, Dubrovskii YA, Murashko EA, Vlasova EN, Demyanova EV, Skorik YA. Cyanocobalamin-Modified Colistin-Hyaluronan Conjugates: Synthesis and Bioactivity. Int J Mol Sci 2023; 24:11550. [PMID: 37511308 PMCID: PMC10380726 DOI: 10.3390/ijms241411550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/06/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Polymeric drug delivery systems enhance the biopharmaceutical properties of antibiotics by increasing their bioavailability, providing programmable and controlled-release properties, and reducing toxicity. In addition, drug delivery systems are a promising strategy to improve the intestinal permeability of various antimicrobial agents, including colistin (CT). This study describes the modification of conjugates based on CT and hyaluronic acid (HA) with cyanocobalamin (vitamin B12). Vitamin B12 was chosen as a targeting ligand because it has its own absorption pathway in the small intestine. The resulting polysaccharide conjugates contained 95 μg/mg vitamin B12 and the CT content was 335 μg/mg; they consisted of particles of two sizes, 98 and 702 nm, with a ζ-potential of approximately -25 mV. An in vitro release test at pH 7.4 and pH 5.2 showed an ultra-slow release of colistin of approximately 1% after 10 h. The modified B12 conjugates retained their antimicrobial activity at the level of pure CT (minimum inhibitory concentration was 2 μg/mL). The resulting delivery systems also reduced the nephrotoxicity of CT by 30-40% (HEK 293 cell line). In addition, the modification of B12 improved the intestinal permeability of CT, and the apparent permeability coefficient of HA-CT-B12 conjugates was 3.5 × 10-6 cm/s, corresponding to an in vivo intestinal absorption of 50-100%. Thus, vitamin-B12-modified conjugates based on CT and HA may be promising oral delivery systems with improved biopharmaceutical properties.
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Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Tatiana S Sall
- Institute of Experimental Medicine, Acad. Pavlov St. 12, St. Petersburg 197376, Russia
| | - Tatiana S Egorova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St. Petersburg 197110, Russia
| | - Yuliya A Nashchekina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky 4, St. Petersburg 194064, Russia
| | - Yaroslav A Dubrovskii
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russia
| | - Ekaterina A Murashko
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russia
| | - Elena N Vlasova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Elena V Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St. Petersburg 197110, Russia
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
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Dubashynskaya NV, Petrova VA, Sgibnev AV, Elokhovskiy VY, Cherkasova YI, Skorik YA. Carrageenan/Chitin Nanowhiskers Cryogels for Vaginal Delivery of Metronidazole. Polymers (Basel) 2023; 15:polym15102362. [PMID: 37242937 DOI: 10.3390/polym15102362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/27/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
The development of polymeric carriers based on partially deacetylated chitin nanowhiskers (CNWs) and anionic sulfated polysaccharides is an attractive strategy for improved vaginal delivery with modified drug release profiles. This study focuses on the development of metronidazole (MET)-containing cryogels based on carrageenan (CRG) and CNWs. The desired cryogels were obtained by electrostatic interactions between the amino groups of CNWs and the sulfate groups of CRG and by the formation of additional hydrogen bonds, as well as by entanglement of carrageenan macrochains. It was shown that the introduction of 5% CNWs significantly increased the strength of the initial hydrogel and ensured the formation of a homogeneous cryogel structure, resulting in sustained MET release within 24 h. At the same time, when the CNW content was increased to 10%, the system collapsed with the formation of discrete cryogels, demonstrating MET release within 12 h. The mechanism of prolonged drug release was mediated by polymer swelling and chain relaxation in the polymer matrix and correlated well with the Korsmeyer-Peppas and Peppas-Sahlin models. In vitro tests showed that the developed cryogels had a prolonged (24 h) antiprotozoal effect against Trichomonas, including MET-resistant strains. Thus, the new cryogels with MET may be promising dosage forms for the treatment of vaginal infections.
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Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russia
| | - Valentina A Petrova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russia
| | - Andrey V Sgibnev
- Institute for Cellular and Intracellular Symbiosis, Ural Branch of the Russian Academy of Sciences, Pionerskaya st. 11, Orenburg 460000, Russia
| | - Vladimir Y Elokhovskiy
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russia
| | - Yuliya I Cherkasova
- Institute for Cellular and Intracellular Symbiosis, Ural Branch of the Russian Academy of Sciences, Pionerskaya st. 11, Orenburg 460000, Russia
| | - Yury A Skorik
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russia
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Petrova VA, Dubashynskaya NV, Gofman IV, Golovkin AS, Mishanin AI, Aquino AD, Mukhametdinova DV, Nikolaeva AL, Ivan'kova EM, Baranchikov AE, Yakimansky AV, Ivanov VK, Skorik YA. Biocomposite films based on chitosan and cerium oxide nanoparticles with promising regenerative potential. Int J Biol Macromol 2023; 229:329-343. [PMID: 36592852 DOI: 10.1016/j.ijbiomac.2022.12.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 12/24/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022]
Abstract
Polymeric nanocomposite materials have great potential in the development of tissue-engineered scaffolds because they affect the structure and properties of polymeric materials and regulate cell proliferation and differentiation. In this work, cerium oxide nanoparticles (CeONPs) were incorporated into a chitosan (CS) film to improve the proliferation of multipotent mesenchymal stem cells (MSCs). The citrate-stabilized CeONPs with a negative ζ-potential (-25.0 mV) were precoated with CS to obtain positively charged particles (+20.3 mV) and to prevent their aggregation in the composite solution. The composite CS-CeONP films were prepared in the salt and basic forms using a dry-cast process. The films obtained in both forms were characterized by a uniform distribution of CeONPs. The incorporation of CeONPs into the salt form of CS increased the stiffness of the CS-CeONP film, while the subsequent conversion of the film to the basic form resulted in a decrease in both the Young's modulus and the yield stress. The redox activity (Ce4+ ⇌ Ce3+) of cerium oxide in the CS-CeONP film was confirmed by thermal oxidative degradation. In vitro culture of MSCs showed that the CS-CeONP film has good biocompatibility, and in vivo experiments demonstrated its substantial regenerative potential.
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Affiliation(s)
- Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Iosif V Gofman
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Alexey S Golovkin
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Alexander I Mishanin
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Arthur D Aquino
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Daria V Mukhametdinova
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Alexandra L Nikolaeva
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Elena M Ivan'kova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Alexander E Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii 31, Moscow 119071, Russian Federation
| | - Alexander V Yakimansky
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Vladimir K Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii 31, Moscow 119071, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation.
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Dubashynskaya NV, Gasilova ER, Skorik YA. Nano-Sized Fucoidan Interpolyelectrolyte Complexes: Recent Advances in Design and Prospects for Biomedical Applications. Int J Mol Sci 2023; 24:ijms24032615. [PMID: 36768936 PMCID: PMC9916530 DOI: 10.3390/ijms24032615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 01/27/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
The marine polysaccharide fucoidan (FUC) is a promising polymer for pharmaceutical research and development of novel drug delivery systems with modified release and targeted delivery. The presence of a sulfate group in the polysaccharide makes FUC an excellent candidate for the formation of interpolyelectrolyte complexes (PECs) with various polycations. However, due to the structural diversity of FUC, the design of FUC-based nanoformulations is challenging. This review describes the main strategies for the use of FUC-based PECs to develop drug delivery systems with improved biopharmaceutical properties, including nanocarriers in the form of FUC-chitosan PECs for pH-sensitive oral delivery, targeted delivery systems, and polymeric nanoparticles for improved hydrophobic drug delivery (e.g., FUC-zein PECs, core-shell structures obtained by the layer-by-layer self-assembly method, and self-assembled hydrophobically modified FUC particles). The importance of a complex study of the FUC structure, and the formation process of PECs based on it for obtaining reproducible polymeric nanoformulations with the desired properties, is also discussed.
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Dubashynskaya NV, Bokatyi AN, Dobrodumov AV, Kudryavtsev IV, Trulioff AS, Rubinstein AA, Aquino AD, Dubrovskii YA, Knyazeva ES, Demyanova EV, Nashchekina YA, Skorik YA. Succinyl Chitosan-Colistin Conjugates as Promising Drug Delivery Systems. Int J Mol Sci 2022; 24:ijms24010166. [PMID: 36613610 PMCID: PMC9820547 DOI: 10.3390/ijms24010166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/11/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
The growth of microbial multidrug resistance is a problem in modern clinical medicine. Chemical modification of active pharmaceutical ingredients is an attractive strategy to improve their biopharmaceutical properties by increasing bioavailability and reducing drug toxicity. Conjugation of antimicrobial drugs with natural polysaccharides provides high efficiency of these systems due to targeted delivery, controlled drug release and reduced toxicity. This paper reports a two-step synthesis of colistin conjugates (CT) with succinyl chitosan (SucCS); first, we modified chitosan with succinyl anhydride to introduce a carboxyl function into the polymer molecule, which was then used for chemical grafting with amino groups of the peptide antibiotic CT using carbodiimide chemistry. The resulting polymeric delivery systems had a degree of substitution (DS) by CT of 3-8%, with conjugation efficiencies ranging from 54 to 100% and CT contents ranging from 130-318 μg/mg. The size of the obtained particles was 100-200 nm, and the ζ-potential varied from -22 to -28 mV. In vitro release studies at pH 7.4 demonstrated ultra-slow hydrolysis of amide bonds, with a CT release of 0.1-0.5% after 12 h; at pH 5.2, the hydrolysis rate slightly increased; however, it remained extremely low (1.5% of CT was released after 12 h). The antimicrobial activity of the conjugates depended on the DS. At DS 8%, the minimum inhibitory concentration (MIC) of the conjugate was equal to the MIC of native CT (1 µg/mL); at DS of 3 and 5%, the MIC increased 8-fold. In addition, the developed systems reduced CT nephrotoxicity by 20-60%; they also demonstrated the ability to reduce bacterial lipopolysaccharide-induced inflammation in vitro. Thus, these promising CT-SucCS conjugates are prospective for developing safe and effective nanoantibiotics.
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Affiliation(s)
- Natallia V. Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
| | - Anton N. Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
| | - Anatoliy V. Dobrodumov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
| | - Igor V. Kudryavtsev
- Institute of Experimental Medicine, Akademika Pavlova 12, 197376 St. Petersburg, Russia
| | - Andrey S. Trulioff
- Institute of Experimental Medicine, Akademika Pavlova 12, 197376 St. Petersburg, Russia
| | - Artem A. Rubinstein
- Institute of Experimental Medicine, Akademika Pavlova 12, 197376 St. Petersburg, Russia
| | - Arthur D. Aquino
- Almazov National Medical Research Centre, Akkuratova 2, 197341 St. Petersburg, Russia
| | | | - Elena S. Knyazeva
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, 197110 St Petersburg, Russia
| | - Elena V. Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, 197110 St Petersburg, Russia
| | - Yuliya A. Nashchekina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky 4, 194064 St. Petersburg, Russia
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
- Correspondence:
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Dubashynskaya NV, Skorik YA. Patches as Polymeric Systems for Improved Delivery of Topical Corticosteroids: Advances and Future Perspectives. Int J Mol Sci 2022; 23:12980. [PMID: 36361769 PMCID: PMC9657685 DOI: 10.3390/ijms232112980] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 12/25/2023] Open
Abstract
Mucoadhesive polymer patches are a promising alternative for prolonged and controlled delivery of topical corticosteroids (CS) to improve their biopharmaceutical properties (mainly increasing local bioavailability and reducing systemic toxicity). The main biopharmaceutical advantages of patches compared to traditional oral dosage forms are their excellent bioadhesive properties and their increased drug residence time, modified and unidirectional drug release, improved local bioavailability and safety profile, additional pain receptor protection, and patient friendliness. This review describes the main approaches that can be used for the pharmaceutical R&D of oromucosal patches with improved physicochemical, mechanical, and pharmacological properties. The review mainly focuses on ways to increase the bioadhesion of oromucosal patches and to modify drug release, as well as ways to improve local bioavailability and safety by developing unidirectional -release poly-layer patches. Various techniques for obtaining patches and their influence on the structure and properties of the resulting dosage forms are also presented.
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Affiliation(s)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia
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Dubashynskaya NV, Petrova VA, Romanov DP, Skorik YA. pH-Sensitive Drug Delivery System Based on Chitin Nanowhiskers-Sodium Alginate Polyelectrolyte Complex. Materials (Basel) 2022; 15:ma15175860. [PMID: 36079241 PMCID: PMC9456586 DOI: 10.3390/ma15175860] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/19/2022] [Accepted: 08/20/2022] [Indexed: 05/31/2023]
Abstract
Polyelectrolyte complexes (PECs), based on partially deacetylated chitin nanowhiskers (CNWs) and anionic polysaccharides, are characterized by their variability of properties (particle size, ζ-potential, and pH-sensitivity) depending on the preparation conditions, thereby allowing the development of polymeric nanoplatforms with a sustained release profile for active pharmaceutical substances. This study is focused on the development of hydrogels based on PECs of CNWs and sodium alginate (ALG) for potential vaginal administration that provide controlled pH-dependent antibiotic release in an acidic vaginal environment, as well as prolonged pharmacological action due to both the sustained drug release profile and the mucoadhesive properties of the polysaccharides. The desired hydrogels were formed as a result of both electrostatic interactions between CNWs and ALG (PEC formation), and the subsequent molecular entanglement of ALG chains, and the formation of additional hydrogen bonds. Metronidazole (MET) delivery systems with the desired properties were obtained at pH 5.5 and an CNW:ALG ratio of 1:2. The MET-CNW-ALG microparticles in the hydrogel composition had an apparent hydrodynamic diameter of approximately 1.7 µm and a ζ-potential of -43 mV. In vitro release studies showed a prolonged pH-sensitive drug release from the designed hydrogels; 37 and 67% of MET were released within 24 h at pH 7.4 and pH 4.5, respectively. The introduction of CNWs into the MET-ALG system not only prolonged the drug release, but also increased the mucoadhesive properties by about 1.3 times. Thus, novel CNW-ALG hydrogels are promising carriers for pH sensitive drug delivery carriers.
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Affiliation(s)
- Natallia V. Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia
| | - Valentina A. Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia
| | - Dmitry P. Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova emb. 2, 199034 St. Petersburg, Russia
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia
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Dubashynskaya NV, Bokatyi AN, Gasilova ER, Dobrodumov AV, Dubrovskii YA, Knyazeva ES, Nashchekina YA, Demyanova EV, Skorik YA. Hyaluronan-colistin conjugates: Synthesis, characterization, and prospects for medical applications. Int J Biol Macromol 2022; 215:243-252. [PMID: 35724903 DOI: 10.1016/j.ijbiomac.2022.06.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/31/2022] [Accepted: 06/11/2022] [Indexed: 11/29/2022]
Abstract
The development of nanotechnology-based antibiotic delivery systems (nanoantibiotics) is an important challenge in the effort to combat microbial multidrug resistance. These systems have improved biopharmaceutical characteristics by increasing local bioavailability and reducing systemic toxicity and the number and frequency of drug side effects. Conjugation of low -molecular -weight antibacterial agents with natural polysaccharides is an effective strategy for developing optimal targeted delivery systems with programmed release and reduced cytotoxicity. This study describes the synthesis of conjugates of colistin (CT) and hyaluronic acid (HA) using carbodiimide chemistry to conjugate the amino groups of CT with the carboxyl groups of HA. The obtained polysaccharide carriers had a degree of substitution (DS) with CT molecules of 3-10 %, and the CT content was 129-377 μg/mg. The size of the fabricated particles was 300-600 nm; in addition, there were conjugates in the form of single macromolecules (30-50 nm). The ζ-potential of developed systems was about -20 mV. In vitro release studies at pH 7.4 and pH 5.2 showed slow hydrolysis of amide bonds, with a CT release of 1-5 % after 24 h. The conjugates retained antimicrobial activity depending on the DS: at DS 8 %, the minimum inhibitory concentration (MIC) of the conjugate corresponded to the MIC of free CT. The resulting systems also reduced CT nephrotoxicity by 20-50 %. These new conjugates of CT with HA are promising for the development of nanodrugs for safe and effective antimicrobial therapy.
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Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation; Institute of Chemistry, St. Petersburg State University, Universitetskii 26, St. Petersburg, Petrodvorets, 198504, Russian Federation
| | - Ekaterina R Gasilova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Anatoliy V Dobrodumov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Yaroslav A Dubrovskii
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Elena S Knyazeva
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russian Federation
| | - Yuliya A Nashchekina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky 4, St. Petersburg 194064, Russian Federation
| | - Elena V Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation.
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14
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Goncharova NS, Condori Leandro HI, Vakhrushev AD, Koshevaya EG, Skorik YA, Mitrofanova LB, Murashova LA, Korobchenko LE, Andreeva EM, Lebedev DS, Moiseeva OM, Mikhaylov EN. Transcatheter radiofrequency pulmonary artery denervation in swine: the evaluation of lesion degree, hemodynamics and pulmonary hypertension inducibility. BMC Pulm Med 2021; 21:418. [PMID: 34922518 PMCID: PMC8684280 DOI: 10.1186/s12890-021-01786-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 12/10/2021] [Indexed: 11/25/2022] Open
Abstract
Background Mechanisms of positive effects of pulmonary artery (PA) denervation (PADN) remain poorly understood. The study aimed to evaluate pulmonary hemodynamic changes after PADN and their association with the extent of PA wall damage in an acute thromboxane A2 (TXA2)-induced pulmonary hypertension (PH) model in swine. Methods In this experimental sham-controlled study, 17 normotensive male white Landrace pigs (the mean weight 36.2 ± 4.5 kg) were included and randomly assigned to group I (n = 9)—PH modeling before and after PADN, group II (n = 4)—PADN only, or group III (n = 4)—PH modeling before and after a sham procedure. Radiofrequency (RF) PADN was performed in the PA trunk and at the proximal parts of the right and left PAs. PA wall lesions were characterized at the autopsy study using histological and the immunohistochemical examination. Results In groups I and II, no statistically significant changes in the mean pulmonary arterial pressure nor systemic blood pressure were found after PADN (−0.8 ± 3.4 vs 4.3 ± 8.6 mmHg, P = 0.47; and 6.0 ± 15.9 vs -8.3 ± 7.5 mmHg, P = 0.1; correspondingly). There was a trend towards a lower diastolic pulmonary arterial pressure after PADN in group I when compared with group III during repeat PH induction (34.4 ± 2.9 vs 38.0 ± 0.8; P = 0.06). Despite the presence of severe PA wall damage at the RF application sites, S100 expression was preserved in the majority of PA specimens. The presence of high-grade PA lesions was associated with HR acceleration after PADN (ρ = 0.68, p = 0.03). No significant correlation was found between the grade of PA lesion severity and PA pressure after PADN with or without PH induction. Conclusions Extended PADN does not affect PH induction using TXA2. Significant PA adventitia damage is associated with HR acceleration after PADN. Possible delayed effects of PADN on perivascular nerves and pulmonary hemodynamics require further research in chronic experiments. Supplementary Information The online version contains supplementary material available at 10.1186/s12890-021-01786-y.
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Affiliation(s)
- Natalia S Goncharova
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341.
| | - Heber Ivan Condori Leandro
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Aleksandr D Vakhrushev
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Elena G Koshevaya
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Yury A Skorik
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Lubov B Mitrofanova
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Lada A Murashova
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Lev E Korobchenko
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Elizaveta M Andreeva
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Dmitry S Lebedev
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Olga M Moiseeva
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341
| | - Evgeny N Mikhaylov
- Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341.
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15
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Fathi F, Saberi Riseh R, Khodaygan P, Hosseini S, Skorik YA. Microencapsulation of a Pseudomonas Strain (VUPF506) in Alginate-Whey Protein-Carbon Nanotubes and Next-Generation Sequencing Identification of This Strain. Polymers (Basel) 2021; 13:polym13234269. [PMID: 34883770 PMCID: PMC8659823 DOI: 10.3390/polym13234269] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/24/2021] [Accepted: 12/03/2021] [Indexed: 12/11/2022] Open
Abstract
Alginate is a common agent used for microencapsulation; however, the formed capsule is easily damaged. Therefore, alginate requires blending with other biopolymers to reduce capsule vulnerability. Whey protein is one polymer that can be incorporated with alginate to improve microcapsule structure. In this study, three different encapsulation methods (extrusion, emulsification, and spray drying) were tested for their ability to stabilize microencapsulated Pseudomonas strain VUPF506. Extrusion and emulsification methods enhanced encapsulation efficiency by up to 80% and gave the best release patterns over two months. A greenhouse experiment using potato plants treated with alginate–whey protein microcapsules showed a decrease in Rhizoctonia disease intensity of up to 70%. This is because whey protein is rich in amino acids and can serve as a resistance induction agent for the plant. In this study, the use of CNT in the ALG–WP system increased the rooting and proliferation and reduced physiological complication. The results of this study showed that the technique used in encapsulation could have a significant effect on the efficiency and persistence of probiotic bacteria. Whole genome sequence analysis of strain VUPF506 identified it as Pseudomonas chlororaphis and revealed some genes that control pathogens.
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Affiliation(s)
- Fariba Fathi
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (F.F.); (R.S.R.); (P.K.); (S.H.)
| | - Roohallah Saberi Riseh
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (F.F.); (R.S.R.); (P.K.); (S.H.)
| | - Pejman Khodaygan
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (F.F.); (R.S.R.); (P.K.); (S.H.)
| | - Samin Hosseini
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (F.F.); (R.S.R.); (P.K.); (S.H.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
- Correspondence:
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16
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Saberi Riseh R, Skorik YA, Thakur VK, Moradi Pour M, Tamanadar E, Noghabi SS. Encapsulation of Plant Biocontrol Bacteria with Alginate as a Main Polymer Material. Int J Mol Sci 2021; 22:ijms222011165. [PMID: 34681825 PMCID: PMC8538305 DOI: 10.3390/ijms222011165] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/20/2022] Open
Abstract
One of the most favored trends in modern agriculture is biological control. However, many reports show that survival of biocontrol bacteria is poor in host plants. Providing biocontrol agents with protection by encapsulation within external coatings has therefore become a popular idea. Various techniques, including extrusion, spray drying, and emulsion, have been introduced for encapsulation of biocontrol bacteria. One commonly used biopolymer for this type of microencapsulation is alginate, a biopolymer extracted from seaweed. Recent progress has resulted in the production of alginate-based microcapsules that meet key bacterial encapsulation requirements, including biocompatibility, biodegradability, and support of long-term survival and function. However, more studies are needed regarding the effect of encapsulation on protective bacteria and their targeted release in organic crop production systems. Most importantly, the efficacy of alginate use for the encapsulation of biocontrol bacteria in pest and disease management requires further verification. Achieving a new formulation based on biodegradable polymers can have significant effects on increasing the quantity and quality of agricultural products.
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Affiliation(s)
- Roohallah Saberi Riseh
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (R.S.R.); (M.M.P.); (E.T.); (S.S.N.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
- Correspondence:
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, SRUC, Edinburgh EH9 3JG, UK;
- Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Greater Noida 201314, Uttar Pradesh, India
- School of Engineering, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India
| | - Mojde Moradi Pour
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (R.S.R.); (M.M.P.); (E.T.); (S.S.N.)
| | - Elahe Tamanadar
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (R.S.R.); (M.M.P.); (E.T.); (S.S.N.)
| | - Shahnaz Shahidi Noghabi
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran; (R.S.R.); (M.M.P.); (E.T.); (S.S.N.)
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Tyshkunova IV, Chukhchin DG, Gofman IV, Pavlova EN, Ushakov VA, Vlasova EN, Poshina DN, Skorik YA. Chitin Cryogels Prepared by Regeneration from Phosphoric Acid Solutions. Materials (Basel) 2021; 14:5191. [PMID: 34576412 PMCID: PMC8468260 DOI: 10.3390/ma14185191] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 01/11/2023]
Abstract
Cryogelation is a developing technique for the production of polysaccharide materials for biomedical applications. The formation of a macroporous structure during the freeze-drying of polysaccharide solutions creates biomaterials suitable for tissue engineering. Due to its availability, biocompatibility, biodegradability, and non-toxicity, chitin is a promising natural polysaccharide for the production of porous materials for tissue engineering; however, its use is limited due to the difficulty of dissolving it. This work describes the preparation of cryogels using phosphoric acid as the solvent. Compared to typical chitin solvents phosphoric acid can be easily removed from the product and recovered. The effects of chitin dissolution conditions on the structure and properties of cryogels were studied. Lightweight (ρ 0.025-0.059 g/cm3), highly porous (96-98%) chitin cryogels with various heterogeneous morphology were produced at a dissolution temperature of 20 ± 3 °C, a chitin concentration of 3-15%, and a dissolution time of 6-25 h. The crystallinity of the chitin and chitin cryogels was evaluated by 13C CP-MAS NMR spectroscopy and X-ray diffractometry. Using FTIR spectroscopy, no phosphoric acid esters were found in the chitin cryogels. The cryogels had compressive modulus E values from 118-345 kPa and specific surface areas of 0.3-0.7 m2/g. The results indicate that chitin cryogels can be promising biomaterials for tissue engineering.
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Affiliation(s)
- Irina V. Tyshkunova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
| | - Dmitry G. Chukhchin
- Department of Biology, Ecology and Biotechnology, Northern (Arctic) Federal University Named after M.V. Lomonosov, Severnaya Dvina Emb. 17, Arkhangelsk 163002, Russia;
| | - Iosif V. Gofman
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
| | - Ekaterina N. Pavlova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
| | - Vadim A. Ushakov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
| | - Elena N. Vlasova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
| | - Daria N. Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia; (I.V.T.); (I.V.G.); (E.N.P.); (V.A.U.); (E.N.V.); (D.N.P.)
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18
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Dubashynskaya NV, Raik SV, Dubrovskii YA, Demyanova EV, Shcherbakova ES, Poshina DN, Shasherina AY, Anufrikov YA, Skorik YA. Hyaluronan/Diethylaminoethyl Chitosan Polyelectrolyte Complexes as Carriers for Improved Colistin Delivery. Int J Mol Sci 2021; 22:8381. [PMID: 34445088 PMCID: PMC8395075 DOI: 10.3390/ijms22168381] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 07/27/2021] [Accepted: 07/30/2021] [Indexed: 12/14/2022] Open
Abstract
Improving the therapeutic characteristics of antibiotics is an effective strategy for controlling the growth of multidrug-resistant Gram-negative microorganisms. The purpose of this study was to develop a colistin (CT) delivery system based on hyaluronic acid (HA) and the water-soluble cationic chitosan derivative, diethylaminoethyl chitosan (DEAECS). The CT delivery system was a polyelectrolyte complex (PEC) obtained by interpolymeric interactions between the HA polyanion and the DEAECS polycation, with simultaneous inclusion of positively charged CT molecules into the resulting complex. The developed PEC had a hydrodynamic diameter of 210-250 nm and a negative surface charge (ζ-potential = -19 mV); the encapsulation and loading efficiencies were 100 and 16.7%, respectively. The developed CT delivery systems were characterized by modified release (30-40% and 85-90% of CT released in 15 and 60 min, respectively) compared to pure CT (100% CT released in 15 min). In vitro experiments showed that the encapsulation of CT in polysaccharide carriers did not reduce its antimicrobial activity, as the minimum inhibitory concentrations against Pseudomonas aeruginosa of both encapsulated CT and pure CT were 1 μg/mL.
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Affiliation(s)
- Natallia V. Dubashynskaya
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia; (N.V.D.); (S.V.R.); (D.N.P.)
| | - Sergei V. Raik
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia; (N.V.D.); (S.V.R.); (D.N.P.)
| | - Yaroslav A. Dubrovskii
- Almazov National Medical Research Centre, Akkuratova 2, 197341 St. Petersburg, Russia;
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, 198504 St. Petersburg, Russia; (A.Y.S.); (Y.A.A.)
- Research and Training Center of Molecular and Cellular Technologies, St. Petersburg State Chemical Pharmaceutical University, Prof. Popova 14, 197376 St. Petersburg, Russia
| | - Elena V. Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, 197110 St. Petersburg, Russia; (E.V.D.); (E.S.S.)
| | - Elena S. Shcherbakova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, 197110 St. Petersburg, Russia; (E.V.D.); (E.S.S.)
| | - Daria N. Poshina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia; (N.V.D.); (S.V.R.); (D.N.P.)
| | - Anna Y. Shasherina
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, 198504 St. Petersburg, Russia; (A.Y.S.); (Y.A.A.)
| | - Yuri A. Anufrikov
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, 198504 St. Petersburg, Russia; (A.Y.S.); (Y.A.A.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia; (N.V.D.); (S.V.R.); (D.N.P.)
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Dubashynskaya NV, Raik SV, Dubrovskii YA, Shcherbakova ES, Demyanova EV, Shasherina AY, Anufrikov YA, Poshina DN, Dobrodumov AV, Skorik YA. Hyaluronan/colistin polyelectrolyte complexes: Promising antiinfective drug delivery systems. Int J Biol Macromol 2021; 187:157-165. [PMID: 34298050 DOI: 10.1016/j.ijbiomac.2021.07.114] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/06/2021] [Accepted: 07/16/2021] [Indexed: 02/07/2023]
Abstract
Nanotechnology-based modification of known antimicrobial agents is a rational and straightforward way to improve their safety and effectiveness. The aim of this study was to develop colistin (CT)-loaded polymeric carriers based on hyaluronic acid (HA) for potential application as antimicrobial agents against multi-resistant gram-negative microorganisms (including ESKAPE pathogens). CT-containing particles were obtained via a polyelectrolyte interaction between protonated CT amino groups and HA carboxyl groups (the CT-HA complex formation constant [logKCT-HA] was about 5.0). The resulting polyelectrolyte complexes had a size of 210-250 nm and a negative charge (ζ-potential -19 mV), with encapsulation and loading efficiencies of 100% and 20%, respectively. The developed CT delivery systems were characterized by modified release (45% and 85% of CT released in 15 and 60 min, respectively) compared to pure CT (100% CT released in 15 min). In vitro tests showed that the encapsulation of CT in polymer particles did not reduce its pharmacological activity; the minimum inhibitory concentrations of both encapsulated CT and pure CT were 1 μg/mL (against Pseudomonas aeruginosa).
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Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Sergei V Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Yaroslav A Dubrovskii
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, St. Petersburg 198504, Russian Federation; Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation; St. Petersburg State Chemical Pharmaceutical University, Prof. Popova 14, St. Petersburg 197376, Russian Federation
| | - Elena S Shcherbakova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russian Federation
| | - Elena V Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russian Federation
| | - Anna Y Shasherina
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, St. Petersburg 198504, Russian Federation
| | - Yuri A Anufrikov
- Institute of Chemistry, St. Petersburg State University, Universitetskii 26, Peterhof, St. Petersburg 198504, Russian Federation
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Anatoliy V Dobrodumov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation.
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20
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Goncharova NS, Andreeva EM, Vakhrushev AD, Leandro HIC, Murashova LA, Voronin SE, Korobchenko LE, Mitrofanova LB, Skorik YA, Galagudza MM, Moiseeva OM, Mikhaylov EN. Modeling of Acute Pulmonary Arterial Hypertension in Pigs Using a Stable Thromboxane A 2 Analogue (U46619): Dose Adjustment and Assessment of Hemodynamic Reactions. Bull Exp Biol Med 2021; 170:729-733. [PMID: 33893968 DOI: 10.1007/s10517-021-05142-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Indexed: 11/29/2022]
Abstract
U46619, a synthetic analogue of thromboxane A2 was used for modeling acute stable and reversible pulmonary arterial hypertension. Administration of U46619 in high doses led to vascular collapse and inhibition of cardiac function. The doses of U46619 were empirically selected that allow attaining the target level of pulmonary hypertension without systemic hemodynamic disturbances. The possibility of attaining the target level of pulmonary hypertension and reversibility of changes after termination of U46619 infusion make this model attractive for evaluation of the efficiency of different therapeutic methods of treatment of pulmonary hypertension in large animals.
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Affiliation(s)
- N S Goncharova
- Non-Coronary Heart Diseases Research Department, St. Petersburg, Russia.
| | - E M Andreeva
- Non-Coronary Heart Diseases Research Department, St. Petersburg, Russia
| | - A D Vakhrushev
- Neuromodulation Research Laboratory, St. Petersburg, Russia
| | | | - L A Murashova
- Center for Preclinical and Translational Research, St. Petersburg, Russia
| | - S E Voronin
- Center for Preclinical and Translational Research, St. Petersburg, Russia
| | | | - L B Mitrofanova
- Research Laboratory of Pathomorphology, V. A. Almazov National Medical Research Centre, Ministry of Health the Russian Federation, St. Petersburg, Russia
| | - Y A Skorik
- Center for Preclinical and Translational Research, St. Petersburg, Russia
| | - M M Galagudza
- Center for Preclinical and Translational Research, St. Petersburg, Russia
| | - O M Moiseeva
- Non-Coronary Heart Diseases Research Department, St. Petersburg, Russia
| | - E N Mikhaylov
- Neuromodulation Research Laboratory, St. Petersburg, Russia.,Arrhythmia Research Department, St. Petersburg, Russia
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21
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Dubashynskaya NV, Bokatyi AN, Skorik YA. Dexamethasone Conjugates: Synthetic Approaches and Medical Prospects. Biomedicines 2021; 9:341. [PMID: 33801776 PMCID: PMC8067246 DOI: 10.3390/biomedicines9040341] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/20/2021] [Accepted: 03/24/2021] [Indexed: 12/12/2022] Open
Abstract
Dexamethasone (DEX) is the most commonly prescribed glucocorticoid (GC) and has a wide spectrum of pharmacological activity. However, steroid drugs like DEX can have severe side effects on non-target organs. One strategy to reduce these side effects is to develop targeted systems with the controlled release by conjugation to polymeric carriers. This review describes the methods available for the synthesis of DEX conjugates (carbodiimide chemistry, solid-phase synthesis, reversible addition fragmentation-chain transfer [RAFT] polymerization, click reactions, and 2-iminothiolane chemistry) and perspectives for their medical application as GC drug or gene delivery systems for anti-tumor therapy. Additionally, the review focuses on the development of DEX conjugates with different physical-chemical properties as successful delivery systems in the target organs such as eye, joint, kidney, and others. Finally, polymer conjugates with improved transfection activity in which DEX is used as a vector for gene delivery in the cell nucleus have been described.
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Affiliation(s)
| | | | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia; (N.V.D.); (A.N.B.)
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22
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Ayrapetyan ON, Obluchinskaya ED, Zhurishkina EV, Skorik YA, Lebedev DV, Kulminskaya AA, Lapina IM. Antibacterial Properties of Fucoidans from the Brown Algae Fucus vesiculosus L. of the Barents Sea. Biology (Basel) 2021; 10:67. [PMID: 33477817 PMCID: PMC7832856 DOI: 10.3390/biology10010067] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 01/15/2021] [Indexed: 02/07/2023]
Abstract
Fucoidans, sulfated polysaccharides found in cell walls of brown algae, are considered as a promising antimicrobial component for various applications in medicine and the food industry. In this study, we compare the antibacterial properties of two fractions of fucoidan from the brown algae Fucus vesiculosus gathered in the littoral of the Barents Sea and sampled at different stages of purification. The crude fraction of fucoidan was isolated from algae by extraction with aqueous ethanol and sonication. The purified fraction was obtained by additional treatment of the crude fraction with a solution of calcium chloride. The structural features of both fractions were characterized in detail and their antibacterial effects against several Gram-positive and Gram-negative bacteria were compared by photometry, acridine orange staining assay, and atomic force microscopy. Fucoidan inhibited growth in all of the above microorganisms, showing a bacteriostatic effect with minimum inhibitory concentrations (MIC) in the range between 4 and 6 mg/mL, with E. coli being the most sensitive to both fractions. Changes in the chemical composition after treatment of the crude fraction with a solution of calcium chloride led to a decrease in the content of sulfates and uronic acids and diminished antibacterial activity.
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Affiliation(s)
- Olga N. Ayrapetyan
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia; (O.N.A.); (E.V.Z.); (D.V.L.); (A.A.K.)
- Kurchatov Genome Center—PNPI, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia
- Faculty of Biotechnologies, ITMO University, Kronverksky Prospekt 49, Building. A, 197101 Saint Petersburg, Russia
| | - Ekaterina D. Obluchinskaya
- Federal State Budgetary Scientific Institution of Murmansk Marine Biological Institute of the Russian Academy of Sciences (MMBI RAS), Vladimirskaya, 17, 183010 Murmansk, Russia;
| | - Elena V. Zhurishkina
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia; (O.N.A.); (E.V.Z.); (D.V.L.); (A.A.K.)
- Kurchatov Genome Center—PNPI, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy Prospekt V.O. 31, 199004 Saint Petersburg, Russia;
| | - Dmitry V. Lebedev
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia; (O.N.A.); (E.V.Z.); (D.V.L.); (A.A.K.)
- National Research Centre Kurchatov Institute, Akademika Kurchatova Square 1, 123182 Moscow, Russia
| | - Anna A. Kulminskaya
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia; (O.N.A.); (E.V.Z.); (D.V.L.); (A.A.K.)
- Kurchatov Genome Center—PNPI, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia
| | - Irina M. Lapina
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia; (O.N.A.); (E.V.Z.); (D.V.L.); (A.A.K.)
- Kurchatov Genome Center—PNPI, Mkr. Orlova Roshcha, 1, 188300 Gatchina, Russia
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23
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Petrova VA, Golovkin AS, Mishanin AI, Romanov DP, Chernyakov DD, Poshina DN, Skorik YA. Cytocompatibility of Bilayer Scaffolds Electrospun from Chitosan/Alginate-Chitin Nanowhiskers. Biomedicines 2020; 8:E305. [PMID: 32847141 PMCID: PMC7555292 DOI: 10.3390/biomedicines8090305] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/18/2020] [Accepted: 08/21/2020] [Indexed: 01/01/2023] Open
Abstract
In this work, a bilayer chitosan/sodium alginate scaffold was prepared via a needleless electrospinning technique. The layer of sodium alginate was electrospun over the layer of chitosan. The introduction of partially deacetylated chitin nanowhiskers (CNW) stabilized the electrospinning and increased the spinnability of the sodium alginate solution. A CNW concentration of 7.5% provided optimal solution viscosity and structurization due to electrostatic interactions and the formation of a polyelectrolyte complex. This allowed electrospinning of defectless alginate nanofibers with an average diameter of 200-300 nm. The overall porosity of the bilayer scaffold was slightly lower than that of a chitosan monolayer, while the average pore size of up to 2 μm was larger for the bilayer scaffold. This high porosity promoted mesenchymal stem cell proliferation. The cells formed spherical colonies on the chitosan nanofibers, but formed flatter colonies and monolayers on alginate nanofibers. The fabricated chitosan/sodium alginate bilayer material was deemed promising for tissue engineering applications.
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Affiliation(s)
- Valentina A. Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia; (V.A.P.); (D.D.C.); (D.N.P.)
| | - Alexey S. Golovkin
- Almazov National Medical Research Centre, Akkuratova st. 2., 197341 St. Petersburg, Russia; (A.S.G.); (A.I.M.)
| | - Alexander I. Mishanin
- Almazov National Medical Research Centre, Akkuratova st. 2., 197341 St. Petersburg, Russia; (A.S.G.); (A.I.M.)
| | - Dmitry P. Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova emb. 2, 199034 St. Petersburg, Russia;
| | - Daniil D. Chernyakov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia; (V.A.P.); (D.D.C.); (D.N.P.)
| | - Daria N. Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia; (V.A.P.); (D.D.C.); (D.N.P.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia; (V.A.P.); (D.D.C.); (D.N.P.)
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24
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Badazhkova VD, Raik SV, Polyakov DS, Poshina DN, Skorik YA. Effect of Double Substitution in Cationic Chitosan Derivatives on DNA Transfection Efficiency. Polymers (Basel) 2020; 12:polym12051057. [PMID: 32380700 PMCID: PMC7284465 DOI: 10.3390/polym12051057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/02/2020] [Accepted: 05/03/2020] [Indexed: 12/28/2022] Open
Abstract
Recently, much effort has been expended on the development of non-viral gene delivery systems based on polyplexes of nucleic acids with various cationic polymers. Natural polysaccharide derivatives are promising carriers due to their low toxicity. In this work, chitosan was chemically modified by a reaction with 4-formyl-n,n,n-trimethylanilinium iodide and pyridoxal hydrochloride and subsequent reduction of the imine bond with NaBH4. This reaction yielded three novel derivatives, n-[4-(n’,n’,n’-trimethylammonium)benzyl]chitosan chloride (TMAB-CS), n-[(3-hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridine)methyl]chitosan chloride (Pyr-CS), and n-[4-(n’,n’,n’’-trimethylammonium)benzyl]-n-[(3-hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridine)methyl]chitosan chloride (PyrTMAB-CS). Their structures and degrees of substitution were established by 1H NMR spectroscopy as DS1 = 0.22 for TMAB-CS, DS2 = 0.28 for Pyr-CS, and DS1 = 0.21, DS2 = 0.22 for PyrTMAB-CS. Dynamic light scattering measurements revealed that the new polymers formed stable polyplexes with plasmid DNA encoding the green fluorescent protein (pEGFP-N3) and that the particles had the smallest size (110–165 nm) when the polymer:DNA mass ratio was higher than 5:1. Transfection experiments carried out in the HEK293 cell line using the polymer:DNA polyplexes demonstrated that Pyr-CS was a rather poor transfection agent at polymer:DNA mass ratios less than 10:1, but it was still more effective than the TMAB-CS and PyrTMAB-CS derivatives that contained a quaternary ammonium group. By contrast, TMAB-CS and PyrTMAB-CS were substantially more effective than Pyr-CS at higher polymer:DNA mass ratios and showed a maximum efficiency at 200:1 (50%–70% transfected cells). Overall, the results show the possibility of combining substituent effects in a single carrier, thereby increasing its efficacy.
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Affiliation(s)
- Veronika D. Badazhkova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, 199004 St. Petersburg, Russia; (V.D.B.); (S.V.R.); (D.N.P.)
| | - Sergei V. Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, 199004 St. Petersburg, Russia; (V.D.B.); (S.V.R.); (D.N.P.)
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Dmitry S. Polyakov
- Institute of Experimental Medicine, Akademika Pavlova st. 12, 197376 St. Petersburg, Russia;
| | - Daria N. Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, 199004 St. Petersburg, Russia; (V.D.B.); (S.V.R.); (D.N.P.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, 199004 St. Petersburg, Russia; (V.D.B.); (S.V.R.); (D.N.P.)
- Correspondence:
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25
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Dubashynskaya NV, Golovkin AS, Kudryavtsev IV, Prikhodko SS, Trulioff AS, Bokatyi AN, Poshina DN, Raik SV, Skorik YA. Mucoadhesive cholesterol-chitosan self-assembled particles for topical ocular delivery of dexamethasone. Int J Biol Macromol 2020; 158:811-818. [PMID: 32371131 DOI: 10.1016/j.ijbiomac.2020.04.251] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 01/13/2023]
Abstract
The topical application of ophthalmic drugs is a convenient and safe mode of drug administration. However, the bioavailability of topical drugs in the eye is low due to eye barriers and the rapid removal of the drug from the conjunctival surface by the tear fluid. The aim of this study was to obtain dexamethasone-loaded mucoadhesive self-assembled particles based on a conjugate of succinyl cholesterol with chitosan (SC-CS) for potential use as a topical ocular formulation. SC-CS was obtained via a carbodiimide-mediated coupling reaction (degree of substitution DS 1.2-5.8%). SC-CS in the DS range of 1.2-3.0% can self-organize in solution to form positively charged particles (ζ-potential 20-37 mV) of submicron size (hydrodynamic diameter 700-900 nm). The SC-CS particles show good mucoadhesiveness, which decreases with increasing DS. The obtained particles can encapsulate 159-170 μg/mg dexamethasone; they release about 50% of drug in 2 h, and the cumulative drug release reached 95% in 24 h. A cell model confirmed that dexamethasone-loaded SC-CS particles are non-cytotoxic and exhibit a comparable anti-inflammatory activity to that of pure dexamethasone. Testing the osmotic resistance of erythrocytes showed that both dexamethasone-loaded and non-loaded SC-CS particles have greater membrane-stabilizing ability than that of dexamethasone.
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Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russian Federation
| | - Alexey S Golovkin
- Almazov National Medical Research Centre, Akkuratova st. 2, St. Petersburg 197341, Russian Federation
| | - Igor V Kudryavtsev
- Institute of Experimental Medicine, Akademika Pavlova st. 12, St. Petersburg 197376, Russian Federation; Far Eastern Federal University, Sukhanova st. 8, Vladivostok 690090, Russian Federation
| | - Stanislava S Prikhodko
- Almazov National Medical Research Centre, Akkuratova st. 2, St. Petersburg 197341, Russian Federation
| | - Andrey S Trulioff
- Institute of Experimental Medicine, Akademika Pavlova st. 12, St. Petersburg 197376, Russian Federation
| | - Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russian Federation
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russian Federation
| | - Sergei V Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russian Federation; Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Peterhof, St. Petersburg 198504, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russian Federation; Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Peterhof, St. Petersburg 198504, Russian Federation.
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Dubashynskaya NV, Skorik YA. Polymyxin Delivery Systems: Recent Advances and Challenges. Pharmaceuticals (Basel) 2020; 13:E83. [PMID: 32365637 PMCID: PMC7281078 DOI: 10.3390/ph13050083] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 02/07/2023] Open
Abstract
Polymyxins are vital antibiotics for the treatment of multiresistant Gram-negative ESKAPE pathogen infections. However, their clinical value is limited by their high nephrotoxicity and neurotoxicity, as well as their poor permeability and absorption in the gastrointestinal tract. This review focuses on various polymyxin delivery systems that improve polymyxin bioavailability and reduce drug toxicity through targeted and controlled release. Currently, the most suitable systems for improving oral, inhalation, and parenteral polymyxin delivery are polymer particles, liposomes, and conjugates, while gels, polymer fibers, and membranes are attractive materials for topical administration of polymyxin for the treatment of infected wounds and burns. In general, the application of these systems protects polymyxin molecules from the negative effects of both physiological and pathological factors while achieving higher concentrations at the target site and reducing dosage and toxicity. Improving the properties of polymyxin will be of great interest to researchers who are focused on developing antimicrobial drugs that show increased efficacy and safety.
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Affiliation(s)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russia;
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27
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Zienkiewicz-Strzałka M, Deryło-Marczewska A, Skorik YA, Petrova VA, Choma A, Komaniecka I. Silver Nanoparticles on Chitosan/Silica Nanofibers: Characterization and Antibacterial Activity. Int J Mol Sci 2019; 21:E166. [PMID: 31881739 PMCID: PMC6981428 DOI: 10.3390/ijms21010166] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/18/2019] [Accepted: 12/23/2019] [Indexed: 12/11/2022] Open
Abstract
A simple, low-cost, and reproducible method for creating materials with even silver nanoparticles (AgNP) dispersion was established. Chitosan nanofibers with silica phase (CS/silica) were synthesized by an electrospinning technique to obtain highly porous 3D nanofiber scaffolds. Silver nanoparticles in the form of a well-dispersed metallic phase were synthesized in an external preparation step and embedded in the CS/silica nanofibers by deposition for obtaining chitosan nanofibers with silica phase decorated by silver nanoparticles (Ag/CS/silica). The antibacterial activity of investigated materials was tested using Gram-positive and Gram-negative bacteria. The results were compared with the properties of the nanocomposite without silver nanoparticles and a colloidal solution of AgNP. The minimum inhibitory concentration (MIC) of obtained AgNP against Staphylococcus aureus (S. aureus) ATCC25923 and Escherichia coli (E. coli) ATCC25922 was determined. The physicochemical characterization of Ag/CS/silica nanofibers using various analytical techniques, as well as the applicability of these techniques in the characterization of this type of nanocomposite, is presented. The resulting Ag/CS/silica nanocomposites (Ag/CS/silica nanofibers) were characterized by small angle X-ray scattering (SAXS), X-ray diffraction (XRD), and atomic force microscopy (AFM). The morphology of the AgNP in solution, both initial and extracted from composite, the properties of composites, the size, and crystallinity of the nanoparticles, and the characteristics of the chitosan fibers were determined by electron microscopy (SEM and TEM).
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Affiliation(s)
- Małgorzata Zienkiewicz-Strzałka
- Department of Physical Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, sq. Maria Curie-Skłodowska 3, 20-031 Lublin, Poland;
| | - Anna Deryło-Marczewska
- Department of Physical Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, sq. Maria Curie-Skłodowska 3, 20-031 Lublin, Poland;
| | - Yury A. Skorik
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russia;
| | - Valentina A. Petrova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russia;
| | - Adam Choma
- Department of Genetics and Microbiology, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland; (A.C.); (I.K.)
| | - Iwona Komaniecka
- Department of Genetics and Microbiology, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland; (A.C.); (I.K.)
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28
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Abstract
Polysaccharides, such as cellulose, hyaluronic acid, alginic acid, and chitosan, as well as polysaccharide derivatives, have been successfully used to augment drug delivery in the treatment of ocular pathologies. The properties of polysaccharides can be extensively modified to optimize ocular drug formulations and to obtain biocompatible and biodegradable drugs with improved bioavailability and tailored pharmacological effects. This review discusses the available polysaccharide choices for overcoming the difficulties associated with ocular drug delivery, and it explores the reasons for the dependence between the physicochemical properties of polysaccharide-based drug carriers and their efficiency in different formulations and applications. Polysaccharides will continue to be of great interest to researchers endeavoring to develop ophthalmic drugs with improved effectiveness and safety.
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Affiliation(s)
- Natallia Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia; (N.D.); (D.P.); (S.R.)
| | - Daria Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia; (N.D.); (D.P.); (S.R.)
| | - Sergei Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia; (N.D.); (D.P.); (S.R.)
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, 198504 St. Petersburg, Russia;
| | - Arto Urtti
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, 198504 St. Petersburg, Russia;
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210 Kuopio, Finland
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St. Petersburg, Russia; (N.D.); (D.P.); (S.R.)
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, 198504 St. Petersburg, Russia;
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29
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Petrova VA, Elokhovskiy VY, Raik SV, Poshina DN, Romanov DP, Skorik YA. Alginate Gel Reinforcement with Chitin Nanowhiskers Modulates Rheological Properties and Drug Release Profile. Biomolecules 2019; 9:E291. [PMID: 31331095 PMCID: PMC6680783 DOI: 10.3390/biom9070291] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 01/15/2023] Open
Abstract
Hydrogels are promising materials for various applications, including drug delivery, tissue engineering, and wastewater treatment. In this work, we designed an alginate (ALG) hydrogel containing partially deacetylated chitin nanowhiskers (CNW) as a filler. Gelation in the system occurred by both the protonation of alginic acid and the formation of a polyelectrolyte complex with deacetylated CNW surface chains. Morphological changes in the gel manifested as a honeycomb structure in the freeze-dried gel, unlike the layered structure of an ALG gel. Disturbance of the structural orientation of the gels by the introduction of CNW was also expressed as a decrease in the intensity of X-ray diffraction reflexes. All studied systems were non-Newtonian liquids that violated the Cox-Merz rule. An increase in the content of CNW in the ALG-CNW hydrogel resulted in increases in the yield stress, maximum Newtonian viscosity, and relaxation time. Inclusion of CNW prolonged the release of tetracycline due to changes in diffusion. The first phases (0-5 h) of the release profiles were well described by the Higuchi model. ALG-CNW hydrogels may be of interest as soft gels for controlled topical or intestinal drug delivery.
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Affiliation(s)
- Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Vladimir Y Elokhovskiy
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Sergei V Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Dmitry P Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova emb. 2, St. Petersburg 199034, Russia
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia.
- Almazov National Medical Research Centre, Akkuratova str. 2., St. Petersburg 197341, Russia.
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Kritchenkov AS, Egorov AR, Krytchankou IS, Dubashynskaya NV, Volkova OV, Shakola TV, Kurliuk AV, Skorik YA. Synthesis of novel 1H-tetrazole derivatives of chitosan via metal-catalyzed 1,3-dipolar cycloaddition. Catalytic and antibacterial properties of [3-(1H-tetrazole-5-yl)ethyl]chitosan and its nanoparticles. Int J Biol Macromol 2019; 132:340-350. [DOI: 10.1016/j.ijbiomac.2019.03.153] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/11/2019] [Accepted: 03/21/2019] [Indexed: 11/29/2022]
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Petrova VA, Chernyakov DD, Poshina DN, Gofman IV, Romanov DP, Mishanin AI, Golovkin AS, Skorik YA. Electrospun Bilayer Chitosan/Hyaluronan Material and Its Compatibility with Mesenchymal Stem Cells. Materials (Basel) 2019; 12:E2016. [PMID: 31238491 PMCID: PMC6631200 DOI: 10.3390/ma12122016] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 06/17/2019] [Accepted: 06/19/2019] [Indexed: 12/17/2022]
Abstract
A bilayer nonwoven material for tissue regeneration was prepared from chitosan (CS) and hyaluronic acid (HA) by needleless electrospinning wherein 10-15 wt% (with respect to polysaccharide) polyethylene oxide was added as spinning starter. A fiber morphology study confirmed the material's uniform defect-free structure. The roughness of the bilayer material was in the range of 1.5-3 μm, which is favorable for cell growth. Electrospinning resulted in the higher orientation of the polymer structure compared with that of corresponding films, and this finding may be related to the orientation of the polymer chains during the spinning process. These structural changes increased the intermolecular interactions. Thus, despite a high swelling degree of 1.4-2.8 g/g, the bilayer matrix maintained its shape due to the large quantity of polyelectrolyte contacts between the chains of oppositely charged polymers. The porosity of the bilayer CS-HA nonwoven material was twice lower, while the Young's modulus and break stress were twice higher than that of a CS monolayer scaffold. Therefore, during the electrospinning of the second layer, HA may have penetrated into the pores of the CS layer, thereby increasing the polyelectrolyte contacts between the two polymers. The bilayer CS-HA scaffold exhibited good compatibility with mesenchymal stem cells. This characteristic makes the developed material promising for tissue engineering applications.
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Affiliation(s)
- Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia.
| | - Daniil D Chernyakov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia.
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia.
| | - Iosif V Gofman
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia.
| | - Dmitry P Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova emb. 2, 199034 St. Petersburg, Russia.
| | - Alexander I Mishanin
- Almazov National Medical Research Centre, Akkuratova str. 2., 197341 St. Petersburg, Russia.
| | - Alexey S Golovkin
- Almazov National Medical Research Centre, Akkuratova str. 2., 197341 St. Petersburg, Russia.
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, 199004 St Petersburg, Russia.
- Almazov National Medical Research Centre, Akkuratova str. 2., 197341 St. Petersburg, Russia.
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Kononova SV, Kruchinina EV, Petrova VA, Baklagina YG, Klechkovskaya VV, Orekhov AS, Vlasova EN, Popova EN, Gubanova GN, Skorik YA. Pervaporation membranes of a simplex type with polyelectrolyte layers of chitosan and sodium hyaluronate. Carbohydr Polym 2019; 209:10-19. [PMID: 30732788 DOI: 10.1016/j.carbpol.2019.01.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 12/28/2018] [Accepted: 01/02/2019] [Indexed: 11/25/2022]
Abstract
Self-supporting multilayer films containing a polyelectrolyte complex (PEC) were prepared by the sequential layering of sodium hyaluronate (HA, MW 5.4 × 104) and chitosan (CS, MW 1.6 × 105, the degree of deacetylation 0.80) in different orders. Imaging with low-voltage scanning electron microscopy (LVSEM) showed that the CS/HA films had a multilayer structure, while X-ray diffraction (XRD) indicated significant structuring of the CS layer near the PEC-CS region. Analysis of the thermal properties of the CS/HA films revealed differences in the structural organization and morphological features of the polymer layers and high thermal stability of the PEC layer. Testing of the transport properties of the CS/HA film in pervaporation (PV) separation using different compositions of ethanol-water mixtures indicated that the multilayer membrane was selective across a wide range of concentrations in the feed. Separation of an azeotropic ethanol-water mixture containing 5 wt% water yielded a permeate consisting of about 100 wt% water. LVSEM revealed that the membrane microstructure changed during the PV process due to membrane swelling and changes in the arrangement of the macromolecules during transport of the penetrant. The results support the use of CS/HA composite films as highly effective PV membranes. In addition to pervaporation separation, CS/HA multilayer films can also be used for drug delivery, tissue engineering, and wound healing applications.
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Affiliation(s)
- Svetlana V Kononova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Elena V Kruchinina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yulia G Baklagina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Vera V Klechkovskaya
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", Russian Academy of Sciences, Leninskiy pr. 59, Moscow 119333, Russian Federation
| | - Anton S Orekhov
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", Russian Academy of Sciences, Leninskiy pr. 59, Moscow 119333, Russian Federation; National Research Centre "Kurchatov Institute", Akademika Kurchatova pl. 1, Moscow 123182, Russian Federation
| | - Elena N Vlasova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Elena N Popova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Galina N Gubanova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation; Institute of Experimental Medicine, Almazov National Medical Research Centre, Akkuratova ul. 2, St. Petersburg 197341, Russian Federation.
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Petrova VA, Panevin AA, Zhuravskii SG, Gasilova ER, Vlasova EN, Romanov DP, Poshina DN, Skorik YA. Preparation of N-succinyl-chitin nanoparticles and their applications in otoneurological pathology. Int J Biol Macromol 2018; 120:1023-1029. [PMID: 30172812 DOI: 10.1016/j.ijbiomac.2018.08.180] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 08/21/2018] [Accepted: 08/29/2018] [Indexed: 12/16/2022]
Abstract
Succinyl-chitin (SCH) nanoparticles were obtained by acylation of partially deacetylated chitin (DCH) nanofibers. Introduction of the succinyl moiety induced a partial amorphization of DCH, as viewed by X-ray diffraction, and increased the fractal dimension of the colloids from df = 1.2 (DCH) to 1.5-1.7 (SCH), as revealed by light scattering. The spherically symmetric form of the colloids remained almost unchanged, as indicated by the range of structure-sensitive ratios 1.0 < Rg/Rh < 1.2; the hydrodynamic diameter ranged from 200 to 300 nm. The cytoprotective activity of the SCH nanoparticles was evaluated in vivo in an acute hearing pathology model (220-250 g male Wistar rats, n = 90) following prophylactic and therapeutic administrations. Ototropic action was estimated using the amplitude of otoacoustic emissions at the frequency of the distortion product otoacoustic emissions in the range of 4-6.4 kHz before acoustic stimulation, as well as at 1 h, 24 h, and 7 days after acoustic stimulation. A dispersion of 0.3% SCH nanoparticles demonstrated prolonged ototropic action and earlier regeneration of hearing functions when compared to a meglumine sodium succinate solution. Thus, intravenous administration of the SCH nanoparticles increases the cycling time of exogenous succinate and improves biodistribution in tissues possessing a hemato-labyrinth barrier.
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Affiliation(s)
- Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Aleksey A Panevin
- Pavlov First Saint Petersburg State Medical University, ul. Lva Tolstogo 6/8, St. Petersburg 197022, Russian Federation; Institute of Experimental Medicine, Almazov National Medical Research Centre, ul. Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Sergei G Zhuravskii
- Pavlov First Saint Petersburg State Medical University, ul. Lva Tolstogo 6/8, St. Petersburg 197022, Russian Federation; Institute of Experimental Medicine, Almazov National Medical Research Centre, ul. Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Ekaterina R Gasilova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Elena N Vlasova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Dmitry P Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, nab. Adm. Makarova 2, St. Petersburg 199034, Russian Federation
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation; Institute of Experimental Medicine, Almazov National Medical Research Centre, ul. Akkuratova 2, St. Petersburg 197341, Russian Federation; Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, St. Petersburg 198504, Russian Federation.
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Raik SV, Poshina DN, Lyalina TA, Polyakov DS, Vasilyev VB, Kritchenkov AS, Skorik YA. N-[4-(N,N,N-trimethylammonium)benzyl]chitosan chloride: Synthesis, interaction with DNA and evaluation of transfection efficiency. Carbohydr Polym 2017; 181:693-700. [PMID: 29254024 DOI: 10.1016/j.carbpol.2017.11.093] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 11/22/2017] [Accepted: 11/26/2017] [Indexed: 12/29/2022]
Abstract
А novel cationic chitosan derivative, N-[4-(N,N,N-trimethylammonium)benzyl]chitosan chloride (TMAB-CS), with different degrees of substitution (DS) was synthesized by a chemoselective interaction of 4-formyl-N,N,N-trimethylanilinium iodide with chitosan amino groups using a reductive amination method. Several factors (pH, reactant ratio, reaction time, and chitosan structure) were studied for their effects on the DS of the resulting TMAB-CS. The obtained derivatives were characterized by 1H NMR and FTIR spectroscopy. Turbidimetric titration showed enhanced solubility over a wide pH range even for low-substituted TMAB-CS. TMAB-CS provided strong DS-dependent binding of plasmid DNA. Dynamic light scattering measurements revealed the formation of stable polyplexes with hydrodynamic diameters of 200-300nm and ζ-potential of 20-30mV. TMAB-CS with relatively low DS (25%) demonstrated more pronounced transfection efficiency (up to 2000 cell/cm2) of plasmid DNA into the HEK293 cell line promoted by free TMAB-CS. The positive effects of lower DS can be related to a better polyplex dissociation within the cell. The cytotoxicity of TMAB-CS was comparable to that of the initial chitosan at concentrations up to 300ng/μL, even at high DS.
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Affiliation(s)
- Sergei V Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation; Saint-Petersburg State University, Universitetskaya nab. 7-9, St. Petersburg 199034, Russian Federation
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Tatiana A Lyalina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretskii pr. 4, St. Petersburg 194064, Russian Federation
| | - Dmitry S Polyakov
- Institute of Experimental Medicine, ul. Akademika Pavlova 12, St. Petersburg 197022, Russian Federation
| | - Vadim B Vasilyev
- Saint-Petersburg State University, Universitetskaya nab. 7-9, St. Petersburg 199034, Russian Federation; Institute of Experimental Medicine, ul. Akademika Pavlova 12, St. Petersburg 197022, Russian Federation
| | - Andreii S Kritchenkov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation; Almazov National Medical Research Centre, ul. Akkuratova 2, St. Petersburg 197341, Russian Federation.
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Kononova SV, Volod'ko AV, Petrova VA, Kruchinina EV, Baklagina YG, Chusovitin EA, Skorik YA. Pervaporation multilayer membranes based on a polyelectrolyte complex of λ-carrageenan and chitosan. Carbohydr Polym 2017; 181:86-92. [PMID: 29254046 DOI: 10.1016/j.carbpol.2017.10.050] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 10/12/2017] [Accepted: 10/12/2017] [Indexed: 11/16/2022]
Abstract
A polyelectrolyte complex (PEC) was prepared from chitosan (CS) and λ-carrageenan (λ-CAR) using a layer-by-layer deposition of polyion solutions on a plated nonporous support. This material was then used as a multilayer membrane for the pervaporation separation of aqueous ethanol solutions. The fabricated complex film (25-30μm thick) was a multilayer system (λ-CAR-PEC-CS) containing a polycation CS (MW 3.1×105, DDА 0.93), a polyanion λ-CAR (MW 3.5×105, extracted from the alga Chondrus armatus), and a PEC layer formed between the two polyion layers. X-ray diffraction indicated a significant structuring of the film in the region of the composite PEC-CS bilayer. The structural and morphological characteristics of the CS surface in the multilayer membrane, as revealed by atomic force microscopy, were close to the characteristics of the dense CS film. However, this structure changed following pervaporation (i.e., the distinct spherical structures on the surface disappeared). Similarly, the initially loose surface of λ-CAR in the composite changed to an ordered domain after pervaporation. The transport properties of the pervaporation membranes were tested by examining the separation of ethanol-water mixtures of different compositions. The flux increased with an increase in the weight percentage of water in the feed mixture, but the separation capacity of the membrane was unchanged. In a range of feed concentrations of 50-94wt%, the membrane mainly releases water with a corresponding concentration in the permeate of 99.9-99.8wt% and substantial fluxes of 0.003-1.130kgm-2h-1 at 40°C. The obtained results indicate significant prospects for the use of non-gelling type CARs for the formation of highly effective pervaporation membranes.
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Affiliation(s)
- Svetlana V Kononova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Aleksandra V Volod'ko
- Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, Pr. 100-letiya Vladivostoka 159, Vladivostok 690022, Russian Federation
| | - Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Elena V Kruchinina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yulia G Baklagina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Evgeniy A Chusovitin
- Institute for Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, ul. Radio 5, Vladivostok 690041, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation; Institute of Experimental Medicine, Almazov National Medical Research Centre, Akkuratova ul. 2, St. Petersburg 197341, Russian Federation; Tyumen State University, ul. Volodarskogo 6, Tyumen 625003, Russian Federation.
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Skorik YA, Golyshev AA, Kritchenkov AS, Gasilova ER, Poshina DN, Sivaram AJ, Jayakumar R. Development of drug delivery systems for taxanes using ionic gelation of carboxyacyl derivatives of chitosan. Carbohydr Polym 2017; 162:49-55. [DOI: 10.1016/j.carbpol.2017.01.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 12/26/2016] [Accepted: 01/05/2017] [Indexed: 11/30/2022]
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Kiroshka VV, Petrova VA, Chernyakov DD, Bozhkova YO, Kiroshka KV, Baklagina YG, Romanov DP, Kremnev RV, Skorik YA. Influence of chitosan-chitin nanofiber composites on cytoskeleton structure and the proliferation of rat bone marrow stromal cells. J Mater Sci Mater Med 2017; 28:21. [PMID: 28012155 DOI: 10.1007/s10856-016-5822-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 11/28/2016] [Indexed: 06/06/2023]
Abstract
Chitosan scaffolds have gained much attention in various tissue engineering applications, but the effect of their microstructure on cell-material spatial interactions remains unclear. Our objective was to evaluate the effect of chitosan-based matrices doping with chitin nano-whiskers (CNW) on adhesion, spreading, cytoskeleton structure, and proliferation of rat bone marrow stromal cells (BMSCs). The behavior of BMSCs during culture on chitosan-CNW films was determined by the molecular mass, hydrophobicity, porosity, crosslinking degree, protonation degree and molecular structure of the composite chitosan-CNW films. The shape, spreading area, cytoskeleton structure, and proliferation of BMSCs on chitosan matrices with a crystalline structure and high porosity were similar to that observed for BMSCs cultured on polystyrene tissue culture plates. The amorphous polymer structure and high swelling led to a decrease in the spreading area and cell proliferation. Thus, we can control the behavior of cells in culture (adhesion, spreading, and proliferation) by changing the physico-chemical properties of the chitosan-CNW films.
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Affiliation(s)
- Victoria V Kiroshka
- Institute for Problems of Cryobiology and Cryomedicine of the National Academy of Sciences of Ukraine, Pereyaslavskaya ul. 23, Kharkov, 61015, Ukraine
| | - Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg, 199004, Russian Federation
| | - Daniil D Chernyakov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg, 199004, Russian Federation
| | - Yulia O Bozhkova
- Institute for Problems of Cryobiology and Cryomedicine of the National Academy of Sciences of Ukraine, Pereyaslavskaya ul. 23, Kharkov, 61015, Ukraine
| | - Katerina V Kiroshka
- Institute for Problems of Cryobiology and Cryomedicine of the National Academy of Sciences of Ukraine, Pereyaslavskaya ul. 23, Kharkov, 61015, Ukraine
| | - Yulia G Baklagina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg, 199004, Russian Federation
| | - Dmitry P Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova nab. 2, St. Petersburg, 199034, Russian Federation
| | - Roman V Kremnev
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, St. Petersburg, 198504, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg, 199004, Russian Federation.
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Lomkova EA, Chytil P, Janoušková O, Mueller T, Lucas H, Filippov SK, Trhlíková O, Aleshunin PA, Skorik YA, Ulbrich K, Etrych T. Biodegradable Micellar HPMA-Based Polymer-Drug Conjugates with Betulinic Acid for Passive Tumor Targeting. Biomacromolecules 2016; 17:3493-3507. [PMID: 27636143 DOI: 10.1021/acs.biomac.6b00947] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here, we present the synthesis, physicochemical, and preliminary biological characterization of micellar polymer-betulinic acid (BA) conjugates based on N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer carriers, enabling the controlled release of cytotoxic BA derivatives in solid tumors or tumor cells. Various HPMA copolymer conjugates differing in the structure of the spacer between the drug and the carrier were synthesized, all designed for pH-triggered drug release in tumor tissue or tumor cells. The high molecular weight of the micellar conjugates should improve the uptake of the drug in solid tumors due to the Enhanced permeability and retention (EPR) effect. Nevertheless, only the conjugate containing BA with methylated carboxyl groups enabled pH-dependent controlled release in vitro. Moreover, drug release led to the disassembly of the micellar structure, which facilitated elimination of the water-soluble HPMA copolymer carrier from the body by renal filtration. The methylated BA derivative and its polymer conjugate exhibited high cytostatic activity against DLD-1, HT-29, and HeLa carcinoma cell lines and enhanced tumor accumulation in HT-29 xenograft in mice.
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Affiliation(s)
- Ekaterina A Lomkova
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic.,St. Petersburg State Chemical Pharmaceutical Academy, 14 Prof. Popov St., St. Petersburg 197022, Russian Federation
| | - Petr Chytil
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic
| | - Olga Janoušková
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic
| | - Thomas Mueller
- Martin-Luther-University Halle-Wittenberg , Department of Internal Medicine IV, Oncology and Haematology, Ernst-Grube-Str. 40, 06120 Halle (Saale), Germany
| | - Henrike Lucas
- Martin-Luther-University Halle-Wittenberg , Institute of Pharmacy, AG Pharmaceutical Technology, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Sergey K Filippov
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic
| | - Olga Trhlíková
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic
| | - Pavel A Aleshunin
- St. Petersburg State Technological Institute (Technical University), 26 Moskovsky Pr., St. Petersburg, 190013, Russian Federation
| | - Yury A Skorik
- St. Petersburg State Chemical Pharmaceutical Academy, 14 Prof. Popov St., St. Petersburg 197022, Russian Federation.,Institute of Macromolecular Compounds, Russian Academy of Sciences , 31 Bolshoy pr. VO, St. Petersburg 199004, Russian Federation
| | - Karel Ulbrich
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic
| | - Tomáš Etrych
- Institute of Macromolecular Chemistry, The Czech Academy of Sciences , Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic
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Skorik YA, Petrova VA, Okatova OV, Strelina IA, Gasilova ER. Characterization of Clusters and Unimers in Associating Solutions of Chitosan by Dynamic and Static Light Scattering. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600146] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yury A. Skorik
- Institute of Macromolecular Compounds; Russian Academy of Sciences; 31 Bolshoy pr St.-Petersburg 199004 Russian Federation
- St. Petersburg State Chemical Pharmaceutical Academy; 14 Prof. Popov Str St.-Petersburg 197022 Russian Federation
| | - Valentina A. Petrova
- Institute of Macromolecular Compounds; Russian Academy of Sciences; 31 Bolshoy pr St.-Petersburg 199004 Russian Federation
| | - Olga V. Okatova
- Institute of Macromolecular Compounds; Russian Academy of Sciences; 31 Bolshoy pr St.-Petersburg 199004 Russian Federation
| | - Irina A. Strelina
- Institute of Macromolecular Compounds; Russian Academy of Sciences; 31 Bolshoy pr St.-Petersburg 199004 Russian Federation
| | - Ekaterina R. Gasilova
- Institute of Macromolecular Compounds; Russian Academy of Sciences; 31 Bolshoy pr St.-Petersburg 199004 Russian Federation
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Solovyev AY, Tarnovskaya SI, Chernova IA, Shataeva LK, Skorik YA. The interaction of amino acids, peptides, and proteins with DNA. Int J Biol Macromol 2015; 78:39-45. [PMID: 25841380 DOI: 10.1016/j.ijbiomac.2015.03.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/19/2015] [Accepted: 03/20/2015] [Indexed: 10/23/2022]
Abstract
Amino acids that carry charges on their side groups can bind to double stranded DNA (dsDNA) and change the strength of the double helix. Measurement of the DNA melting temperature (Tm) confirmed that acidic amino acids (Glu, Asp) weaken the H-bonds between DNA strands, whereas basic amino acids (Arg, Lys) strengthen the interaction between the strands. A rank correlation exists between the amino acid isoelectric points and the observed changes in Tm. A similar dependence of the hyperchromic effect on the isoelectric point of a protein (pepsin, insulin, cortexin, and protamine) was observed for DNA-protein complexes at room temperature. Short peptides (KE, AEDG, and KEDP) containing a mixture of acidic and basic amino acid residues also affect Tm and the stability of the double helix. A model for binding Glu and Lys to dsDNA was explored by a docking simulation. The model shows that Glu, in an untwisted shape, binds to dsDNA in its major groove and disrupts three H-bonds between the strands, thereby destabilizing the double helix. Lys, in an untwisted shape, binds to the external side of the dsDNA and forms two bonds with O atoms of neighboring phosphodiester groups, thereby strengthening the DNA helix.
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Affiliation(s)
- Andrey Y Solovyev
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Svetlana I Tarnovskaya
- St. Petersburg State Polytechnical University, Polytekhnicheskaya ul. 29, St. Petersburg 195251, Russian Federation
| | - Irina A Chernova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Larisa K Shataeva
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. VO 31, St. Petersburg 199004, Russian Federation; St. Petersburg State Chemical Pharmaceutical Academy, ul. Prof. Popova 14, St. Petersburg 197022, Russian Federation.
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Skorik YA, Pestov AV, Kodess MI, Yatluk YG. Carboxyalkylation of chitosan in the gel state. Carbohydr Polym 2012; 90:1176-81. [DOI: 10.1016/j.carbpol.2012.06.072] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 06/21/2012] [Accepted: 06/23/2012] [Indexed: 10/28/2022]
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Abstract
Peptide nucleic acid (PNA) is a synthetic analogue of DNA, which has the same nucleobases as DNA but typically has a backbone based on aminoethyl glycine (Aeg). PNA forms duplexes by Watson Crick hybridization. The Aeg-based PNA duplexes adopt a chiral helical structure but do not have a preferred handedness because they do not contain a chiral center. An L-lysine situated at the C-end of one or both strands of a PNA duplex causes the duplex to preferably adopt a left-handed structure. We have introduced into the PNA duplexes both a C-terminal L-lysine and one or two PNA monomers that have a γ-(S)-methyl-aminoethyl glycine backbone, which is known to induce a preference for a right-handed structure. Indeed, we found that in these duplexes the γ-methyl monomer exerts the dominant chiral induction effect causing the duplexes to adopt a right-handed structure. The chiral PNA monomer had a 2,2':6',2''-terpyridine (Tpy) ligand instead of a nucleobase and PNA duplexes that contained one or two Tpys formed [Cu(Tpy)(2)](2+) complexes in the presence of Cu(2+). The CD spectroscopy studies showed that these metal-coordinated duplexes were right-handed due to the chiral induction effect exerted by the S-Tpy PNA monomer(s) except for the cases when the [Cu(Tpy)(2)](2+) complex was formed with Tpy ligands from two different PNA duplexes. In the latter case, the metal complex bridged the two PNA duplexes and the duplexes were left-handed. The results of this study show that the preferred handedness of a ligand-modified PNA can be switched as a consequence of metal coordination to the ligand. This finding could be used as a tool in the design of functional nucleic-acid based nanostructures.
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Affiliation(s)
- Silvia Bezer
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213-3890, USA
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Abstract
The substitution of nucleobases in nucleic acid duplexes with ligands that have high affinity for transition metal ions creates metal-binding sites at specific locations within the duplexes. Several studies on the incorporation of metal ions into DNA and peptide nucleic acid (PNA) duplexes have suggested that the stability constant of the metal complex formed within the duplexes is a primary determinant of the thermal stability of the duplexes. To understand this relationship, we have synthesized two PNA monomers that carry the same ligand, namely 8-hydroxyquinoline, but have this ligand attached differently to the PNA backbone. The PNA monomers have been incorporated into PNA duplexes. UV and CD spectroscopy and calorimetric studies of the 8-hydroxyquinoline-PNA duplexes showed that the effect of the stability of the metal complex on the PNA duplexes was significantly modulated by the steric relationship between the complex and the duplex. This information is useful for the construction of hybrid inorganic-nucleic acid nanostructures.
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Affiliation(s)
- Zhijie Ma
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
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Skorik YA, Pestov AV, Yatluk YG. Evaluation of various chitin-glucan derivatives from Aspergillus niger as transition metal adsorbents. Bioresour Technol 2010; 101:1769-1775. [PMID: 19900804 DOI: 10.1016/j.biortech.2009.10.033] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Revised: 10/03/2009] [Accepted: 10/14/2009] [Indexed: 05/28/2023]
Abstract
A number of chelating resins were prepared by chemical derivatization of the chitin-glucan (CG) complex isolated from Aspergillus niger biomass, namely chitosan-glucan (CsG), O-carboxymethyl-chitin-glucan (CM-CG), O-(2-sulfoethyl)chitin-glucan (SE-CG), and N-(2-carboxyethyl)chitosan-glucan (CE-CsG). The chemical modification was confirmed by FT-IR and elemental analysis. Nanosecond electron beam irradiation was used to produce insoluble resins and to preserve the reactive functional groups. Batch experiments were carried out to evaluate the adsorption selectivity and capacity of the resins toward transition metal ions (Cu(2+), Ni(2+), Co(2+), Zn(2+)). The resins showed good adsorption capability with the following selectivity series: Co(2+)<Ni(2+)<Cu(2+)>Zn(2+). The total metal adsorption capacities of CG, CsG, CM-CG, SE-CG, and CE-CsG resins at pH 6.5 (ammonium acetate buffer) were found to be 0.205, 0.382, 1.752, 0.319, and 0.350 mmol g(-1), respectively. Our results suggest that, depending on the type of chemical modification, the chitin-glucan complexes can be used either for selective Cu(2+) removal (CsG) or for total transition metal adsorption (CM-CG) from aqueous effluents.
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Affiliation(s)
- Yury A Skorik
- St Petersburg State Chemical Pharmaceutical Academy, 14 Prof Popov St, St Petersburg 197376, Russia.
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Bushkova OV, Koryakova IP, Skorik YA, Lirova BI, Pestov AV, Zhukovsky VM. Influence of metal coordination on conductivity behavior in poly(butadiene–acrylonitrile)–CoCl2 system. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.02.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pestov AV, Skorik YA, Kogan G, Yatluk YG. N-alkylation of chitosan by β-halopropionic acids in the presence of various acceptors. J Appl Polym Sci 2008. [DOI: 10.1002/app.26784] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
Recent studies on metal incorporation in ligand-modified nucleic acids have focused on the effect of metal coordination on the stability of metal-containing duplexes or triplexes and on the metal binding selectivity but did not address the effect of the sequence of the nucleic acid in which the ligands are incorporated. We have introduced 8-hydroxyquinoline Q in 10-mer PNA strands with various sequences and have investigated the properties of the duplexes formed from these strands upon binding of Cu(2+). Variable-temperature UV-vis spectroscopy shows that, in the presence of Cu(2+), duplexes are formed even from ligand-modified Q-PNA strands that have a large number of mismatches. Spectrophotometric titrations demonstrate that at any temperature, one Cu(2+) ion binds a pair of Q-PNA strands that each contain one 8-hydroxyquinoline, but below the melting temperature, the PNA duplex exerts a supramolecular chelate effect, which prevents the transformation in the presence of excess Cu(2+) of the 1:2 Cu(2+):Q-PNA complexes into 1:1 complexes. EPR spectroscopy gives further support for the existence in the duplexes of [CuQ(2)] moieties that are similar to the corresponding square planar synthetic complex formed between Cu(2+) and 8-hydroxyquinoline. As PNA duplexes show a preferred handedness due to the chiral induction effect of a C-terminal l-lysine, which is transmitted through stacking interactions within the duplex, only if the metal-containing duplex has complementary strands, does it show a chiral excess measured by CD spectroscopy. The strong effect of the metal-ligand moiety is suggestive of an increased correlation length in PNA duplexes that contain such moieties. These results indicate that strong metal-ligand alternative base pairs significantly diminish the importance of Watson-Crick base pairing for the formation of a stable PNA duplex and lead to high mismatch tolerance, a principle that can be used in the construction of hybrid inorganic-nucleic acid nanostructures.
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Affiliation(s)
- Richard M Watson
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Pestov AV, Peresypkina EV, Virovets AV, Podberezskaya NV, Yatluk YG, Skorik YA. Bis[N-(2-hydroxyethyl)-beta-alaninato]copper(II). Acta Crystallogr C 2005; 61:m510-2. [PMID: 16330833 DOI: 10.1107/s0108270105033780] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2005] [Accepted: 10/19/2005] [Indexed: 11/10/2022] Open
Abstract
The Cu(II) ion in the title complex, [Cu(C5H10NO3)2] or [Cu(He-ala)2] [He-ala = N-(2-hydroxyethyl)-beta-alaninate], resides at the inversion centre of a square bipyramid comprised of two facially arranged tridentate He-ala ligands. Each He-ala ligand binds to a Cu(II) ion by forming one six-membered beta-alaninate chelate ring in a twist conformation and one five-membered ethanolamine ring in an envelope conformation, with Cu-N = 2.017 (2) angstroms, Cu-O(COO) = 1.968 (1) angstroms and Cu-O(OH) = 2.473 (2) angstroms. The [Cu(He-ala)2] molecules are involved in a network of O-H...O and N-H...O hydrogen bonds, forming layers parallel to the (10-1) plane. The layers are connected into a three-dimensional structure by van der Waals interactions, so that the molecular centres form pseudo-face-centered close packing.
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Affiliation(s)
- Alexander V Pestov
- I. Ya. Postovsky Institute of Organic Synthesis, Urals Division of the Russian Academy of Sciences, 20/22 Akademicheskaya/S. Kovalevskoy Street, 620219 Ekaterinburg, Russian Federation
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