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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shishatskaya E.I., Volova T.G., Popova T.G.
Заглавие : Study of biological properties of polyhydroxyalkanoates in a long-term experiment in vivo
Место публикации : Biomedical Engineering. - 2002. - Vol. 36, Is. 4. - С. 218-222. - ISSN 00063398 (ISSN) , DOI 10.1023/A:1021136203338
Ключевые слова (''Своб.индексиров.''): hemoglobin--polyhydroxyalkanoic acid--animal experiment--animal tissue--article--biocompatibility--biodegradability--biosynthesis--blood cell count--blood sampling--comparative study--controlled study--dna synthesis--elasticity--enzyme activity--enzyme mechanism--erythrocyte sedimentation rate--female--in vivo study--liver function--nonhuman--organ weight--rat--suture--animalia
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shishatskaya E.I., Volova T.G., Efremov S.N., Puzyr' A.P., Mogil'Naya O.A.
Заглавие : Tissue response to biodegradable suture threads made of polyhydroxyalkanoates
Место публикации : Biomedical Engineering. - 2002. - Vol. 36, Is. 4. - С. 210-217. - ISSN 00063398 (ISSN) , DOI 10.1023/A:1021184119268
Ключевые слова (''Своб.индексиров.''): acid phosphatase--alkaline phosphatase--polyhydroxyalkanoic acid--animal experiment--animal tissue--article--biocompatibility--biodegradability--controlled study--elasticity--enzyme activity--enzyme mechanism--female--histochemistry--incision--nonhuman--physical chemistry--postoperative period--rat--rigidity--suture--thickness--tissue reaction--wound healing--animalia
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T..., Kiselev E..., Vinogradova O..., Nikolaeva E..., Chistyakov A..., Sukovatiy A..., Shishatskaya E...
Заглавие : A Glucose-Utilizing Strain, Cupriavidus euthrophus B-10646: Growth Kinetics, Characterization and Synthesis of Multicomponent PHAs
Колич.характеристики :15 с
Коллективы : Project "Biotechnologies of novel biomaterials: Innovative Biopolymers and Biomedicine Devices" [11.G34.31.0013]
Место публикации : PLoS One: PUBLIC LIBRARY SCIENCE, 2014. - Vol. 9, Is. 2. - Ст.e87551. - ISSN 1932-6203, DOI 10.1371/journal.pone.0087551
Примечания : Cited References: 64. - This study was financially supported by Project "Biotechnologies of novel biomaterials: Innovative Biopolymers and Biomedicine Devices" (Agreement No. 11.G34.31.0013 with Amendment No. 1 of 15 February 2013) in accordance with Resolution No. 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning." The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Предметные рубрики: RALSTONIA-EUTROPHA
BIODEGRADABLE POLYHYDROXYALKANOATES
AEROMONAS-HYDROPHILA
ESCHERICHIA-COLI
MOLECULAR-WEIGHT
SURFACE-ENERGY
NORTH PACIFIC
TERPOLYESTER
BIOSYNTHESIS
POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE-CO-3-HYDROXYHEXANOATE)
Аннотация: This study investigates kinetic and production parameters of a glucose-utilizing bacterial strain, C. eutrophus B-10646, and its ability to synthesize PHA terpolymers. Optimization of a number of parameters of bacterial culture (cell concentration in the inoculum, physiological activity of the inoculum, determined by the initial intracellular polymer content, and glucose concentration in the culture medium during cultivation) provided cell concentrations and PHA yields reaching 110 g/L and 80%, respectively, under two-stage batch culture conditions. Addition of precursor substrates (valerate, hexanoate, propionate, c-butyrolactone) to the culture medium enabled synthesis of PHA terpolymers, P(3HB/3HV/4HB) and P(3HB/3HV/3HHx), with different composition and different molar fractions of 3HB, 3HV, 4HB, and 3HHx. Different types of PHA terpolymers synthesized by C. eutrophus B-10646 were used to prepare films, whose physicochemical and physicalmechanical properties were investigated. The properties of PHA terpolymers were significantly different from those of the P3HB homopolymer: they had much lower degrees of crystallinity and lower melting points and thermal decomposition temperatures, with the difference between these temperatures remaining practically unchanged. Films prepared from all PHA terpolymers had higher mechanical strength and elasticity than P3HB films. In spite of dissimilar surface structures, all films prepared from PHA terpolymers facilitated attachment and proliferation of mouse fibroblast NIH 3T3 cells more effectively than polystyrene and the highly crystalline P3HB.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T., Kiselev E., Vinogradova O., Nikolaeva E., Chistyakov A., Sukovatiy A., Shishatskaya E.
Заглавие : A glucose-utilizing strain, cupriavidus euthrophus B-10646: Growth kinetics, characterization and synthesis of multicomponent PHAs
Место публикации : PLoS ONE. - 2014. - Vol. 9, Is. 2. - ISSN 19326203 (ISSN) , DOI 10.1371/journal.pone.0087551
Ключевые слова (''Своб.индексиров.''): 3 hydroxybutyrate 3 hydroxyhexanoate 3 hydroxyvalerate copolymer--3 hydroxybutyrate 4 hydroxybutyrate 3 hydroxyvalerate copolymer--copolymer--gamma butyrolactone--glucose--hexanoic acid--poly(3 hydroxybutyric acid)--polyhydroxyalkanoic acid--polystyrene--propionic acid--unclassified drug--valeric acid--animal cell--article--bacterial growth--bacterium culture--cell adhesion--cell proliferation--crystal structure--culture optimization--cupriavidus--cupriavidus euthrophus--decomposition--elasticity--film--glucose utilization--kinetics--mechanics--melting point--mouse--nonhuman--nucleotide sequence--physical chemistry--polymerization--strength--synthesis
Аннотация: This study investigates kinetic and production parameters of a glucose-utilizing bacterial strain, C. eutrophus B-10646, and its ability to synthesize PHA terpolymers. Optimization of a number of parameters of bacterial culture (cell concentration in the inoculum, physiological activity of the inoculum, determined by the initial intracellular polymer content, and glucose concentration in the culture medium during cultivation) provided cell concentrations and PHA yields reaching 110 g/L and 80%, respectively, under two-stage batch culture conditions. Addition of precursor substrates (valerate, hexanoate, propionate, ?-butyrolactone) to the culture medium enabled synthesis of PHA terpolymers, P(3HB/3HV/4HB) and P(3HB/ 3HV/3HHx), with different composition and different molar fractions of 3HB, 3HV, 4HB, and 3HHx. Different types of PHA terpolymers synthesized by C. eutrophus B-10646 were used to prepare films, whose physicochemical and physical-mechanical properties were investigated. The properties of PHA terpolymers were significantly different from those of the P3HB homopolymer: they had much lower degrees of crystallinity and lower melting points and thermal decomposition temperatures, with the difference between these temperatures remaining practically unchanged. Films prepared from all PHA terpolymers had higher mechanical strength and elasticity than P3HB films. In spite of dissimilar surface structures, all films prepared from PHA terpolymers facilitated attachment and proliferation of mouse fibroblast NIH 3T3 cells more effectively than polystyrene and the highly crystalline P3HB. Copyright: © 2014 Volova et al.
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T., Kiselev E., Nemtsev I., Lukyanenko A., Sukovatyi A., Kuzmin A., Ryltseva G., Shishatskaya E.
Заглавие : Properties of degradable polyhydroxyalkanoates with different monomer compositions
Колич.характеристики :17 с
Коллективы : RFBRRussian Foundation for Basic Research (RFBR) [19-43-240012]; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [FSRZ-2020-0006]
Место публикации : Int. J. Biol. Macromol.: ELSEVIER, 2021. - Vol. 182. - С. 98-114. - ISSN 0141-8130, DOI 10.1016/j.ijbiomac.2021.04.008. - ISSN 1879-0003(eISSN)
Примечания : Cited References:106. - The part of the reported study on polymer synthesis and examinationwas funded by RFBR and KKRF [Grant No. 19-43-240012 "Biological and physical principles of production of new generation biomaterials"]. The work on production and investigation of polymer films was carried out as part of the State Assignment of the Ministry of Education and Science of the Russian Federation [Grant No. FSRZ-2020-0006].
Предметные рубрики: PALM KERNEL OIL
RALSTONIA-EUTROPHA
BIODEGRADABLE POLYMERS
Аннотация: Purpose: To synthesize and investigate polyhydroxyalkanoates (PHAs) with different monomer composition and percentages and polymer films prepared from them. Results: Various PHAs: homopolymer poly-3-hydroxybutyrate P(3HB) and 2-, 3-, and 4-component copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), and 3-hydroxyhexanoate (3HHx) monomers were synthesized under specialized conditions. Relationships were found between the monomer composition of PHAs and their molecular-weight and thermal properties and degree of crystallinity. All copolymers had decreased weight average molecular weights, Mw (to 390-600 kDa), and increased values of polydispersity (3.2-4.6) compared to the P(3HB). PHA copolymers showed different thermal behavior: an insignificant decrease in Tmelt and the presence of the second peak in the melting region and changes in parameters of crystallization and glass transition. At the same time, they retained thermostability, and the difference between Tmelt and Tdegr was at least 100-120 degrees C. Incorporation of 4HB, 3HV, and 3HHx monomer units into the 3-hydroxybutyrate chain caused changes in the amorphous to crystalline ratio and decreased the degree of crystallinity (Cx) to 20-40%. According to the degree to which the monomers reduced crystallinity, they were ranked as follows: 4HB - 3HHx - 3HV. A unique set of films was produced; their surface properties and physical/mechanical properties were studied as dependent on PHA composition; monomers other than 3hydroxybutyrate were found to enhance hydrophilicity, surface development, and elasticity of polymer films. Conclusion: An innovative set of PHA copolymers was synthesized and solution-cast films were prepared from them; the copolymers and films were investigated as dependent on polymer chemical composition. Results obtained in the present study contribute to the solution of a critical issue of producing degradable polymer materials. (C) 2021 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T., Kiselev E., Nemtsev I., Lukyanenko А., Sukovatyi A., Kuzmin A., Ryltseva G., Shishatskaya E.
Заглавие : Properties of degradable polyhydroxyalkanoates with different monomer compositions
Место публикации : Int. J. Biol. Macromol.: Elsevier B.V., 2021. - Vol. 182. - С. 98-114. - ISSN 01418130 (ISSN), DOI 10.1016/j.ijbiomac.2021.04.008
Аннотация: Purpose: To synthesize and investigate polyhydroxyalkanoates (PHAs) with different monomer composition and percentages and polymer films prepared from them. Results: Various PHAs: homopolymer poly-3-hydroxybutyrate P(3HB) and 2-, 3-, and 4-component copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), and 3-hydroxyhexanoate (3HHx) monomers were synthesized under specialized conditions. Relationships were found between the monomer composition of PHAs and their molecular-weight and thermal properties and degree of crystallinity. All copolymers had decreased weight average molecular weights, Mw (to 390–600 kDa), and increased values of polydispersity (3.2–4.6) compared to the P(3HB). PHA copolymers showed different thermal behavior: an insignificant decrease in Tmelt and the presence of the second peak in the melting region and changes in parameters of crystallization and glass transition. At the same time, they retained thermostability, and the difference between Tmelt and Tdegr was at least 100–120 °C. Incorporation of 4HB, 3HV, and 3HHx monomer units into the 3-hydroxybutyrate chain caused changes in the amorphous to crystalline ratio and decreased the degree of crystallinity (Cx) to 20–40%. According to the degree to which the monomers reduced crystallinity, they were ranked as follows: 4HB – 3HHx – 3HV. A unique set of films was produced; their surface properties and physical/mechanical properties were studied as dependent on PHA composition; monomers other than 3-hydroxybutyrate were found to enhance hydrophilicity, surface development, and elasticity of polymer films. Conclusion: An innovative set of PHA copolymers was synthesized and solution-cast films were prepared from them; the copolymers and films were investigated as dependent on polymer chemical composition. Results obtained in the present study contribute to the solution of a critical issue of producing degradable polymer materials. © 2021 Elsevier B.V.
Scopus
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