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Mai J, Kockler K, Parisi E, Chan CM, Pratt S, Laycock B. Synthesis and physical properties of polyhydroxyalkanoate (PHA)-based block copolymers: A review. Int J Biol Macromol 2024; 263:130204. [PMID: 38365154 DOI: 10.1016/j.ijbiomac.2024.130204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 01/15/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
Polyhydroxyalkanoates (PHAs) are a group of natural polyesters that are synthesised by microorganisms. In general, their thermoplasticity and (in some forms) their elasticity makes them attractive alternatives to petrochemical-derived polymers. However, the high crystallinity of some PHAs - such as poly(3-hydroxybutyrate) (P3HB) - results in brittleness and a narrow processing window for applications such as packaging. The production of copolymeric PHA materials is one approach to improving the mechanical and thermal properties of PHAs. Another solution is the manufacture of PHA-based block copolymers. The incorporation of different polymer and copolymer blocks coupled to PHA, and the resulting tailorable microstructure of these block copolymers, can result in a step-change improvement in PHA-based material properties. A range of production strategies for PHA-based block copolymers has been reported in the literature, including biological production and chemical synthesis. Biological production is typically less controllable, with products of a broad molecular weight and compositional distribution, unless finely controlled using genetically modified organisms. By contrast, chemical synthesis delivers relatively controllable block structures and narrowly defined compositions. This paper reviews current knowledge in the areas of the production and properties of PHA-based block copolymers, and highlights knowledge gaps and future potential areas of research.
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Affiliation(s)
- Jingjing Mai
- Fujian Normal University, College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fuzhou, Fujian 350000, China
| | - Katrin Kockler
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia
| | - Emily Parisi
- Parisi Technologies, LLC Portland, Oregon, United States
| | - Clement Matthew Chan
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia
| | - Steven Pratt
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia
| | - Bronwyn Laycock
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia.
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Mai J, Pratt S, Laycock B, Chan CM. Synthesis and Characterisation of Poly(3-hydroxybutyrate- co-3-hydroxyvalerate)- b-poly(3-hydroxybutyrate- co-3-hydroxyvalerate) Multi-Block Copolymers Produced Using Diisocyanate Chemistry. Polymers (Basel) 2023; 15:3257. [PMID: 37571152 PMCID: PMC10422281 DOI: 10.3390/polym15153257] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/23/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023] Open
Abstract
Bacterially derived polyhydroxyalkanoates (PHAs) are attractive alternatives to commodity petroleum-derived plastics. The most common forms of the short chain length (scl-) PHAs, including poly(3-hydroxybutyrate) (P3HB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), are currently limited in application because they are relatively stiff and brittle. The synthesis of PHA-b-PHA block copolymers could enhance the physical properties of PHAs. Therefore, this work explores the synthesis of PHBV-b-PHBV using relatively high molecular weight hydroxy-functionalised PHBV starting materials, coupled using facile diisocyanate chemistry, delivering industrially relevant high-molecular-weight block copolymeric products. A two-step synthesis approach was compared with a one-step approach, both of which resulted in successful block copolymer production. However, the two-step synthesis was shown to be less effective in building molecular weight. Both synthetic approaches were affected by additional isocyanate reactions resulting in the formation of by-products such as allophanate and likely biuret groups, which delivered partial cross-linking and higher molecular weights in the resulting multi-block products, identified for the first time as likely and significant by-products in such reactions, affecting the product performance.
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Affiliation(s)
| | | | - Bronwyn Laycock
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia; (J.M.); (S.P.)
| | - Clement Matthew Chan
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia; (J.M.); (S.P.)
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Mai J, Chan CM, Laycock B, Pratt S. Understanding the Reaction of Hydroxy-Terminated Poly(3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) Random Copolymers with a Monoisocyanate. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Affiliation(s)
- Jingjing Mai
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Clement Matthew Chan
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Bronwyn Laycock
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Steven Pratt
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
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Mai J, Chan CM, Colwell J, Pratt S, Laycock B. Characterisation of end groups of hydroxy-functionalised scl-PHAs prepared by transesterification using ethylene glycol. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pospisilova A, Vodicka J, Trudicova M, Juglova Z, Smilek J, Mencik P, Masilko J, Slaninova E, Melcova V, Kalina M, Obruca S, Sedlacek P. Effects of Differing Monomer Compositions on Properties of P(3HB-co-4HB) Synthesized by Aneurinibacillus sp. H1 for Various Applications. Polymers (Basel) 2022; 14:polym14102007. [PMID: 35631889 PMCID: PMC9146627 DOI: 10.3390/polym14102007] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 02/01/2023] Open
Abstract
Films prepared from poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymers produced by Aneurinibacillus sp. H1 using an automatic film applicator were homogeneous and had a defined thickness, which allowed a detailed study of physicochemical properties. Their properties were compared with those of a poly (3-hydroxybutyrate) homopolymer film prepared by the same procedure, which proved to be significantly more crystalline by DSC and XRD. Structural differences between samples had a major impact on their properties. With increasing 4-hydroxybutyrate content, the ductility and release rate of the model hydrophilic active ingredient increased significantly. Other observed properties, such as the release of the hydrophobic active substance, the contact angle with water and ethylene glycol, or the surface morphology and roughness, were also affected by the composition. The identified properties predetermine these copolymers for wide use in areas such as biomedicine or smart biodegradable packaging for food or cosmetics. The big advantage is the possibility of fine-tuning properties simply by changing the fermentation conditions.
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A Review on Biological Synthesis of the Biodegradable Polymers Polyhydroxyalkanoates and the Development of Multiple Applications. Catalysts 2022. [DOI: 10.3390/catal12030319] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Polyhydroxyalkanoates, or PHAs, belong to a class of biopolyesters where the biodegradable PHA polymer is accumulated by microorganisms as intracellular granules known as carbonosomes. Microorganisms can accumulate PHA using a wide variety of substrates under specific inorganic nutrient limiting conditions, with many of the carbon-containing substrates coming from waste or low-value sources. PHAs are universally thermoplastic, with PHB and PHB copolymers having similar characteristics to conventional fossil-based polymers such as polypropylene. PHA properties are dependent on the composition of its monomers, meaning PHAs can have a diverse range of properties and, thus, functionalities within this biopolyester family. This diversity in functionality results in a wide array of applications in sectors such as food-packaging and biomedical industries. In order for PHAs to compete with the conventional plastic industry in terms of applications and economics, the scale of PHA production needs to grow from its current low base. Similar to all new polymers, PHAs need continuous technological developments in their production and material science developments to grow their market opportunities. The setup of end-of-life management (biodegradability, recyclability) system infrastructure is also critical to ensure that PHA and other biobased biodegradable polymers can be marketed with maximum benefits to society. The biobased nature and the biodegradability of PHAs mean they can be a key polymer in the materials sector of the future. The worldwide scale of plastic waste pollution demands a reformation of the current polymer industry, or humankind will face the consequences of having plastic in every step of the food chain and beyond. This review will discuss the aforementioned points in more detail, hoping to provide information that sheds light on how PHAs can be polymers of the future.
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El-Malek FA, Steinbüchel A. Post-Synthetic Enzymatic and Chemical Modifications for Novel Sustainable Polyesters. Front Bioeng Biotechnol 2022; 9:817023. [PMID: 35071219 PMCID: PMC8766639 DOI: 10.3389/fbioe.2021.817023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
Because of their biodegradability, compostability, compatibility and flexible structures, biodegradable polymers such as polyhydroxyalkanoates (PHA) are an important class of biopolymers with various industrial and biological uses. PHAs are thermoplastic polyesters with a limited processability due to their low heat resistance. Furthermore, due to their high crystallinity, some PHAs are stiff and brittle. These features result sometimes in very poor mechanical characteristics with low extension at break values which limit the application range of some natural PHAs. Several in vivo approaches for PHA copolymer modifications range from polymer production to enhance PHA-based material performance after synthesis. The methods for enzymatic and chemical polymer modifications are aiming at modifying the structures of the polyesters and thereby their characteristics while retaining the biodegradability. This survey illustrates the efficient use of enzymes and chemicals in post-synthetic PHA modifications, offering insights on these green techniques for modifying and improving polymer performance. Important studies in this sector will be reviewed, as well as chances and obstacles for their stability and hyper-production.
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Affiliation(s)
- Fady Abd El-Malek
- International Center for Research on Innovative Biobased Materials (ICRI-BioM)-International Research Agenda, Lodz University of Technology, Lodz, Poland
| | - Alexander Steinbüchel
- International Center for Research on Innovative Biobased Materials (ICRI-BioM)-International Research Agenda, Lodz University of Technology, Lodz, Poland
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Microbial cell factories for the production of polyhydroxyalkanoates. Essays Biochem 2021; 65:337-353. [PMID: 34132340 DOI: 10.1042/ebc20200142] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/14/2021] [Accepted: 05/26/2021] [Indexed: 12/20/2022]
Abstract
Pollution caused by persistent petro-plastics is the most pressing problem currently, with 8 million tons of plastic waste dumped annually in the oceans. Plastic waste management is not systematized in many countries, because it is laborious and expensive with secondary pollution hazards. Bioplastics, synthesized by microorganisms, are viable alternatives to petrochemical-based thermoplastics due to their biodegradable nature. Polyhydroxyalkanoates (PHAs) are a structurally and functionally diverse group of storage polymers synthesized by many microorganisms, including bacteria and Archaea. Some of the most important PHA accumulating bacteria include Cupriavidus necator, Burkholderia sacchari, Pseudomonas sp., Bacillus sp., recombinant Escherichia coli, and certain halophilic extremophiles. PHAs are synthesized by specialized PHA polymerases with assorted monomers derived from the cellular metabolite pool. In the natural cycle of cellular growth, PHAs are depolymerized by the native host for carbon and energy. The presence of these microbial PHA depolymerases in natural niches is responsible for the degradation of bioplastics. Polyhydroxybutyrate (PHB) is the most common PHA with desirable thermoplastic-like properties. PHAs have widespread applications in various industries including biomedicine, fine chemicals production, drug delivery, packaging, and agriculture. This review provides the updated knowledge on the metabolic pathways for PHAs synthesis in bacteria, and the major microbial hosts for PHAs production. Yeasts are presented as a potential candidate for industrial PHAs production, with their high amenability to genetic engineering and the availability of industrial-scale technology. The major bottlenecks in the commercialization of PHAs as an alternative for plastics and future perspectives are also critically discussed.
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Polyhydroxyalkanoates based copolymers. Int J Biol Macromol 2019; 140:522-537. [PMID: 31437500 DOI: 10.1016/j.ijbiomac.2019.08.147] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/09/2019] [Accepted: 08/17/2019] [Indexed: 11/23/2022]
Abstract
Polyhydroxyalkanoates (PHAs) belong to a family of natural polyesters and are produced under unbalanced growth conditions as intracellular carbon and energy reserves by a wide variety of microorganisms. Being biodegradable, biocompatible and environmental friendly thermoplastics, the PHAs are considered as future polymers to replace petrochemicals based plastics. In this review, the introduction section deals with the brief discussion on PHA nature, availability, raw materials for production, processing etc. This is followed by the discussions on modifications. The copolymer syntheses by bacterial and chemical methods have been discussed. Under chemical methods, unsaturated side chains and their derivatives, oligomer, coupling, macro-initiating, trans-esterification, radiation grafting, click chemistry, ring opening and several miscellaneous polymerization methods have been elaborated. A brief discussion on applications has been incorporated. The last section includes conclusion and future perspectives.
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Younas M, Noreen A, Sharif A, Majeed A, Hassan A, Tabasum S, Mohammadi A, Zia KM. A review on versatile applications of blends and composites of CNC with natural and synthetic polymers with mathematical modeling. Int J Biol Macromol 2019; 124:591-626. [PMID: 30447361 DOI: 10.1016/j.ijbiomac.2018.11.064] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/04/2018] [Accepted: 11/12/2018] [Indexed: 12/20/2022]
Abstract
Cellulose is world's most abundant, renewable and recyclable polysaccharide on earth. Cellulose is composed of both amorphous and crystalline regions. Cellulose nanocrystals (CNCs) are extracted from crystalline region of cellulose. The most attractive feature of CNC is that it can be used as nanofiller to reinforce several synthetic and natural polymers. In this article, a comprehensive overview of modification of several natural and synthetic polymers using CNCs as reinforcer in respective polymer matrix is given. The immense activities of CNCs are successfully utilized to enhance the mechanical properties and to broaden the field of application of respective polymer. All the technical scientific issues have been discussed highlighting the recent advancement in biomedical and packaging field.
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Affiliation(s)
- Muhammad Younas
- Department of Mathematics, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Aqdas Noreen
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Aqsa Sharif
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Ayesha Majeed
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Abida Hassan
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Shazia Tabasum
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Abbas Mohammadi
- Department of Polymer Chemistry, University of Isfahan, Isfahan, Islamic Republic of Iran
| | - Khalid Mahmood Zia
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan.
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Wang J, Yu J, Yan Y, Yang D, Wang P, Xu Y, Zhu J, Xu G, He D, Huang G. Biodegradable polyester/modified mesoporous silica composites for effective bone repair with self‐reinforced properties. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4578] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jielin Wang
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
| | - Jianshu Yu
- School of Materials Science and EngineeringShanghai Jiao Tong University Shanghai China
| | - Yinan Yan
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
| | - Dicheng Yang
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
| | - Ping Wang
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
- Collaborative Research CenterShanghai University of Medicine & Health Sciences Shanghai China
| | - Yan Xu
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
- Collaborative Research CenterShanghai University of Medicine & Health Sciences Shanghai China
| | - Jun Zhu
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
- Collaborative Research CenterShanghai University of Medicine & Health Sciences Shanghai China
| | - Guohua Xu
- Department of Orthopedic Surgery, The Spine Surgical Center, Changzheng HospitalSecond Military Medical University Shanghai China
| | - Dannong He
- Nanobiological Medicine and Technology Application LaboratoryNational Engineering Research Center for Nanotechnology Shanghai China
- Collaborative Research CenterShanghai University of Medicine & Health Sciences Shanghai China
| | - Gang Huang
- Collaborative Research CenterShanghai University of Medicine & Health Sciences Shanghai China
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Abdelwahab MA, El-Barbary AA, El-Said KS, El Naggar SA, ElKholy HM. Evaluation of antibacterial and anticancer properties of poly(3-hydroxybutyrate) functionalized with different amino compounds. Int J Biol Macromol 2019; 122:793-805. [DOI: 10.1016/j.ijbiomac.2018.10.164] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 10/08/2018] [Accepted: 10/24/2018] [Indexed: 12/21/2022]
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Zhou L, Xi Y, Chen M, Niu W, Wang M, Ma PX, Lei B. A highly antibacterial polymeric hybrid micelle with efficiently targeted anticancer siRNA delivery and anti-infection in vitro/in vivo. NANOSCALE 2018; 10:17304-17317. [PMID: 30198034 DOI: 10.1039/c8nr03001d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Most of the diseases such as tumors are usually accompanied by microbial infection, especially after surgical operation, which prevents successful cancer therapy. It is necessary to develop a safe and efficient siRNA delivery vector with high anti-bacterial capability. Here, three multifunctional polymeric hybrid micelles (PHM1, PHM2 and PHM3) with high antimicrobial activity were prepared by mixing polymers PEG-b-P3/4HB-b-PEI-b-FA (EHP-FA) and PEG-b-P3/4HB-b-EPL (EHE) copolymer at different mixing ratios and evaluated for targeted siRNA delivery and anti-infection applications. The PHM micelles, taking advantage of the binding ability of EHE and the protection ability of EHP-FA, could effectively combine, protect siRNA, release complexed siRNA and target cancer cells. Additionally, PHM micelles displayed good hemocompatibility, lower cytotoxicity and higher gene silencing efficiency than commercial PEI (25 kDa) in A549, HeLa, HepG2 and C2C12 cells. Through optimizing the ratio of EHP-FA and EHE, PHM/sip65 showed a high p65 gene silencing efficiency above 90% in various cancer cells, which were significantly higher than EHP-FA/sip65 alone and EHE/sip65 complexes. Furthermore, PHM2 micelles showed excellent antimicrobial activity towards positive bacteria (S. aureus) in vitro and in vivo. Our study may provide a facile strategy to develop multifunctional polymer gene vectors for highly promising siRNA delivery and anti-infection.
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Affiliation(s)
- Li Zhou
- Frontier Institute of Science and Technology, Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, China.
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Russell RA, Foster LJR, Holden PJ. Carbon nanotube mediated miscibility of polyhydroxyalkanoate blends and chemical imaging using deuterium-labelled poly(3-hydroxyoctanoate). Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.05.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Ye H, Zhang K, Kai D, Li Z, Loh XJ. Polyester elastomers for soft tissue engineering. Chem Soc Rev 2018; 47:4545-4580. [PMID: 29722412 DOI: 10.1039/c8cs00161h] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polyester elastomers are soft, biodegradable and biocompatible and are commonly used in various biomedical applications, especially in tissue engineering. These synthetic polyesters can be easily fabricated using various techniques such as solvent casting, particle leaching, molding, electrospinning, 3-dimensional printing, photolithography, microablation etc. A large proportion of tissue engineering research efforts have focused on the use of allografts, decellularized animal scaffolds or other biological materials as scaffolds, but they face the major concern of triggering immunological responses from the host, on top of other issues. This review paper will introduce the recent developments in elastomeric polyesters, their synthesis and fabrication techniques, as well as their application in the biomedical field, focusing primarily on tissue engineering in ophthalmology, cardiac and vascular systems. Some of the commercial and near-commercial polyesters used in these tissue engineering fields will also be described.
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Affiliation(s)
- Hongye Ye
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
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Wang J, Du B, Fan Z, Li S, Yun P, Su F. Composites of poly(L
-lactide-trimethylene carbonate-glycolide) and surface modified SBA-15 as bone repair material. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4244] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Jielin Wang
- Department of Materials Science; Fudan University; Shanghai 200433 China
- Institut Européen des Membranes, UMR CNRS 5635; Universite de Montpellier; 34095 Montpellier cedex 5 France
| | - Beibei Du
- Department of Materials Science; Fudan University; Shanghai 200433 China
| | - Zhongyong Fan
- Department of Materials Science; Fudan University; Shanghai 200433 China
| | - Suming Li
- Institut Européen des Membranes, UMR CNRS 5635; Universite de Montpellier; 34095 Montpellier cedex 5 France
| | - Peng Yun
- College of Chemical Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
| | - Feng Su
- College of Chemical Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
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Romo-Uribe A, Meneses-Acosta A, Domínguez-Díaz M. Viability of HEK 293 cells on poly-β-hydroxybutyrate (PHB) biosynthesized from a mutant Azotobacter vinelandii strain. Cast film and electrospun scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 81:236-246. [DOI: 10.1016/j.msec.2017.07.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 06/26/2017] [Accepted: 07/27/2017] [Indexed: 11/28/2022]
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Zhou L, Xi Y, Yu M, Wang M, Guo Y, Li P, Ma PX, Lei B. RETRACTED: Highly antibacterial polypeptide-based amphiphilic copolymers as multifunctional non-viral vectors for enhanced intracellular siRNA delivery and anti-infection. Acta Biomater 2017; 58:90-101. [PMID: 28600130 DOI: 10.1016/j.actbio.2017.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 05/27/2017] [Accepted: 06/05/2017] [Indexed: 12/20/2022]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal).
This article has been retracted at the request of the Authors.
The manuscript contains in vivo animal experiment (antiinfection study). The corresponding author checked all raw data again and found that the approval from the Animal Ethics Committee at Xi’an Jiaotong University was not received prior to performing the animal experiment, although it was stated as such in the paper. The authors apologize for the oversight. Given the situation, the authors do not have the confidence in the normalization of the animal experiments process and corresponding results. To maintain the academic standards and rigor, the authors request the retraction of this paper. All authors agree with this retraction except for Peter X. Ma where no response could be solicited in time.
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Wang S, Chen W, Xiang H, Yang J, Zhou Z, Zhu M. Modification and Potential Application of Short-Chain-Length Polyhydroxyalkanoate (SCL-PHA). Polymers (Basel) 2016; 8:E273. [PMID: 30974550 PMCID: PMC6432283 DOI: 10.3390/polym8080273] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/09/2016] [Accepted: 07/21/2016] [Indexed: 01/21/2023] Open
Abstract
As the only kind of naturally-occurring biopolyester synthesized by various microorganisms, polyhydroxyalkanoate (PHA) shows a great market potential in packaging, fiber, biomedical, and other fields due to its biodegradablity, biocompatibility, and renewability. However, the inherent defects of scl-PHA with low 3HV or 4HB content, such as high stereoregularity, slow crystallization rate, and particularly the phenomena of formation of large-size spherulites and secondary crystallization, restrict the processing and stability of scl-PHA, as well as the application of its products. Many efforts have focused on the modification of scl-PHA to improve the mechanical properties and the applicability of obtained scl-PHA products. The modification of structure and property together with the potential applications of scl-PHA are covered in this review to give a comprehensive knowledge on the modification and processing of scl-PHA, including the effects of physical blending, chemical structure design, and processing conditions on the crystallization behaviors, thermal stability, and mechanical properties of scl-PHA.
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Affiliation(s)
- Shichao Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Wei Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Hengxue Xiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Junjie Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Zhe Zhou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
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Fan X, Yin M, Jiang Z, Pan N, Ren X, Huang TS. Antibacterial poly(3-hydroxybutyrate-co-4-hydroxybutyrate) fibrous membranes containing quaternary ammonium salts. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3839] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xiaoyan Fan
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangsu Engineering Technology Research Center for Functional Textiles, College of Textiles and Clothing; Jiangnan University; Wuxi 214122 Jiangsu China
| | - Maoli Yin
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangsu Engineering Technology Research Center for Functional Textiles, College of Textiles and Clothing; Jiangnan University; Wuxi 214122 Jiangsu China
| | - Zhiming Jiang
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangsu Engineering Technology Research Center for Functional Textiles, College of Textiles and Clothing; Jiangnan University; Wuxi 214122 Jiangsu China
| | - Nengyu Pan
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangsu Engineering Technology Research Center for Functional Textiles, College of Textiles and Clothing; Jiangnan University; Wuxi 214122 Jiangsu China
| | - Xuehong Ren
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangsu Engineering Technology Research Center for Functional Textiles, College of Textiles and Clothing; Jiangnan University; Wuxi 214122 Jiangsu China
| | - Tung-Shi Huang
- Department of Poultry Science; Auburn University; Auburn AL 36849 USA
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22
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Fan X, Zhao Y, Xu W, Li L. Linear-dendritic block copolymer for drug and gene delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 62:943-59. [PMID: 26952501 DOI: 10.1016/j.msec.2016.01.044] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/31/2015] [Accepted: 01/19/2016] [Indexed: 11/19/2022]
Abstract
Dendrimers as a new class of polymeric materials have a highly ordered branched structure, exact molecular weight, multivalency and available internal cavities, which make them extensively used in biology and drug-delivery. Concurrent with the development of dendrimers, much more attention is drawn to a novel block copolymer which combines linear chains with dendritic macromolecules, the linear-dendritic block copolymer (LDBC). Because of the different solubility of the contrasting regions, the amphiphilic LDBCs could self-assemble to form aggregates with special core-shell structures which exhibit excellent properties different from traditional micelles, such as lower critical micelle concentration, prolonged circulation in the bloodstream, better biocompatibility, and lower toxicity. The present review briefly describes the type of LDBC, the self-assembly behavior in solution, and the application in delivery system including the application as drug carriers and gene vectors. The interactions between block copolymers and drugs are also summarized to better understand the release mechanism of drugs from the linear-dendritic block copolymers.
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Affiliation(s)
- Xiaohui Fan
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan, Shandong Province 250012, China
| | - Yanli Zhao
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan, Shandong Province 250012, China
| | - Wei Xu
- Department of Pharmacy, Shandong Provincial Qian Foshan Hospital, Jinan, Shandong Province, China
| | - Lingbing Li
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan, Shandong Province 250012, China.
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23
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The Synthesis of Hydroxybutyrate-Based Block Polyurethane from Telechelic Diols with Robust Thermal and Mechanical Properties. J CHEM-NY 2016. [DOI: 10.1155/2016/9635165] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A series of novel amphiphilic block polyurethanes (PUHE) have been successfully synthesized by solution polymerization of the derived PHB-diol and poly(ethylene glycol) with a coupling agent of 1,6-hexamethylene diisocyanate (HDI), while the PHB-diol was prepared via the transesterification of PHB and ethylene glycol. The hydroxyl contents in PHB-diols range from 1.36 to 1.99 (the molar ratio) as determined by nonaqueous titration. The molecular weight and chemical compositions of PUHE and PHB-diol were investigated by GPC,1H NMR, and FTIR in detail, which confirm the successful synthesis of PUHE. The tensile strength and elongation at break of PUHE could reach as high as 20 MPa and 210%, as the content of PHB in PUHE is 33%. TGA curves indicate that block-bonding between PHB-diol and PEG increases the thermal stability of PHB-diol. Film degradation of PUHE was studied by weight loss and scanning electron microscope (SEM). It could be concluded that degradation occurred gradually from the surface to the inside and that the degradation rate could be controlled by adjusting the PHB/PEG ratios. These properties make PUHE able to be used as a biodegradable thermoplastic elastomer.
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24
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Mai J, Chai X, Su L, Li Q, Zhao X. Enhanced nutrient removal from lake water via biodegradation of poly(l-lactide)/poly(3-hydroxybutyrate-co-4-hydroxybutyrate) blends. RSC Adv 2016. [DOI: 10.1039/c5ra19501b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Shaped insoluble PLA/P(3HB-co-4HB) blends were applied as slow-release carbon sources to promote the removal of nutrients and facilitate the control of eutrophication in lake water.
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Affiliation(s)
- Jingjing Mai
- State Key Laboratory of Pollution Control and Resource Reuse
- Tongji University
- Shanghai 200092
- China
| | - Xiaoli Chai
- State Key Laboratory of Pollution Control and Resource Reuse
- Tongji University
- Shanghai 200092
- China
| | - Lianghu Su
- Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection
- Nanjing 210046
- China
| | - Qiang Li
- State Key Laboratory of Pollution Control and Resource Reuse
- Tongji University
- Shanghai 200092
- China
| | - Xin Zhao
- State Key Laboratory of Pollution Control and Resource Reuse
- Tongji University
- Shanghai 200092
- China
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25
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Wang J, Cheng Y, Fan Z, Li S, Liu X, Shen X, Su F. Composites of poly(l-lactide-trimethylene carbonate-glycolide) and surface modified calcium carbonate whiskers as a potential bone substitute material. RSC Adv 2016. [DOI: 10.1039/c6ra07832j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Calcium carbonate whiskers are surface modified by grafting of poly(l-lactide) chains, and used to reinforce a biodegradable terpolymer matrix. Optimal properties are obtained for composites with a PLLA-g-CCW content of 2 wt%.
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Affiliation(s)
- Jielin Wang
- Department of Materials Science
- Fudan University
- Shanghai 200433
- China
- Institut Européen des Membranes
| | - Yilin Cheng
- Department of Materials Science
- Fudan University
- Shanghai 200433
- China
| | - Zhongyong Fan
- Department of Materials Science
- Fudan University
- Shanghai 200433
- China
| | - Suming Li
- Institut Européen des Membranes
- UMR CNRS 5635
- Université de Montpellier
- 34095 Montpellier Cedex 5
- France
| | - Xue Liu
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Xin Shen
- College of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Feng Su
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
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26
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Fan X, Ren X, Huang TS, Sun Y. Cytocompatible antibacterial fibrous membranes based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and quaternarized N-halamine polymer. RSC Adv 2016. [DOI: 10.1039/c6ra08465f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel polymeric N-halamine-containing quaternary ammonium salt (PHQS) was synthesized and used to make antibacterial electrospun fibrous membranes by blending with biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-4HB)).
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Affiliation(s)
- Xiaoyan Fan
- Key Laboratory of Eco-textiles of Ministry of Education
- Jiangsu Engineering Technology Research Center for Functional Textiles
- College of Textiles and Clothing
- Jiangnan University
- Wuxi 214122
| | - Xuehong Ren
- Key Laboratory of Eco-textiles of Ministry of Education
- Jiangsu Engineering Technology Research Center for Functional Textiles
- College of Textiles and Clothing
- Jiangnan University
- Wuxi 214122
| | | | - Yuyu Sun
- Department of Chemistry
- University of Massachusetts Lowell
- Lowell
- USA
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27
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Han J, Wu LP, Hou J, Zhao D, Xiang H. Biosynthesis, Characterization, and Hemostasis Potential of Tailor-Made Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Produced by Haloferax mediterranei. Biomacromolecules 2015; 16:578-88. [DOI: 10.1021/bm5016267] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jing Han
- State
Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Lin-Ping Wu
- Department
of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jing Hou
- State
Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Dahe Zhao
- State
Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Hua Xiang
- State
Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
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28
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Wang X, Sang L, Wei Z, Zhai L, Wang H, Song K, Qi M. Facile preparation and cytocompatibility of poly(lactic acid)/poly(3-hydroxybutyrate-co-4-hydroxybutyrate) hybrid fibrous scaffolds. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xinhui Wang
- School of Materials Science and Engineering; Dalian University of Technology; Dalian 116024 China
| | - Lin Sang
- School of Materials Science and Engineering; Dalian University of Technology; Dalian 116024 China
| | - Zhiyong Wei
- Department of Polymer Science and Materials; Dalian University of Technology; Dalian 116024 China
| | - Lijie Zhai
- First Affiliated Hospital of Dalian Medical University; Dalian 116011 China
| | - Hong Wang
- First Affiliated Hospital of Dalian Medical University; Dalian 116011 China
| | - Kedong Song
- Dalian R&D Center for Stem Cell and Tissue Engineering; State Key Laboratory of Fine Chemicals, Dalian University of Technology; Dalian 116024 China
| | - Min Qi
- School of Materials Science and Engineering; Dalian University of Technology; Dalian 116024 China
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29
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Yu HY, Qin ZY. Surface grafting of cellulose nanocrystals with poly(3-hydroxybutyrate-co-3-hydroxyvalerate). Carbohydr Polym 2014; 101:471-8. [DOI: 10.1016/j.carbpol.2013.09.048] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 08/18/2013] [Accepted: 09/14/2013] [Indexed: 11/26/2022]
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30
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Li G, Li D, Niu Y, He T, Chen KC, Xu K. Alternating block polyurethanes based on PCL and PEG as potential nerve regeneration materials. J Biomed Mater Res A 2013; 102:685-97. [DOI: 10.1002/jbm.a.34732] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 03/19/2013] [Accepted: 03/21/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Guangyao Li
- Multidisciplinary Research Center; Shantou University; Daxue Lu 243 Shantou Guangdong 515063 China
| | - Dandan Li
- Multidisciplinary Research Center; Shantou University; Daxue Lu 243 Shantou Guangdong 515063 China
| | - Yuqing Niu
- Multidisciplinary Research Center; Shantou University; Daxue Lu 243 Shantou Guangdong 515063 China
| | - Tao He
- Multidisciplinary Research Center; Shantou University; Daxue Lu 243 Shantou Guangdong 515063 China
| | - Kevin C. Chen
- Multidisciplinary Research Center; Shantou University; Daxue Lu 243 Shantou Guangdong 515063 China
| | - Kaitian Xu
- Multidisciplinary Research Center; Shantou University; Daxue Lu 243 Shantou Guangdong 515063 China
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31
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Zhou L, Chen Z, Wang F, Yang X, Zhang B. Multifunctional triblock co-polymer mP3/4HB-b-PEG-b-lPEI for efficient intracellular siRNA delivery and gene silencing. Acta Biomater 2013; 9:6019-31. [PMID: 23295402 DOI: 10.1016/j.actbio.2012.12.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 12/01/2012] [Accepted: 12/27/2012] [Indexed: 01/24/2023]
Abstract
A non-viral siRNA carrier composed of mono-methoxy-poly (3-hydroxybutyrate-co-4-hydroxybutyrate)-block-polyethylene glycol-block-linear polyethyleneimine (mP3/4HB-b-PEG-b-lPEI) was synthesized using 1800 Da linear polyethyleneimine and evaluated for siRNA delivery. Our study demonstrated that siRNA could be efficiently combined with mP3/4HB-b-PEG-b-lPEI (mAG) co-polymer and was protected from nuclease degradation. The combined siRNA were released from the complexes easily under heparin competition. The particle size of the mAG/siRNA complexes was 158 nm, with a ζ-potential of around 28 mV. Atomic force microscopy images displayed spherical and homogeneously distributed complexes. The mAG block co-polymer displayed low cytotoxicity and efficient cellular uptake of Cy3-siRNA in A549 cells by flow cytometry and confocal microscopy. In vitro transfection efficiency of the block co-polymer was assessed using siRNA against luciferase in cultured A549-Luc, HeLa-Luc, HLF-Luc, A375-Luc and MCF-7-Luc cells. A higher transfection efficiency and lower cytotoxicity was obtained by mAG block co-polymer in five cell lines. Furthermore, a remarkable improvement in luciferase gene silencing efficiency of the mAG complex (up to 90-95%) over that of Lipofectamine™ 2000 (70-82%) was observed in HLF-Luc and A375-Luc cells. Additionally, a mAG/p65-siRNA complex also showed a better capability than Lipofectamine™ 2000/p65-siRNA complex to drastically reduce the p65 mRNA level down to 10-16% in HeLa, U251 and HUVEC cells at an N/P ratio of 70.
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Affiliation(s)
- Li Zhou
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
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32
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Cai R, Li R, Qian J, Xie A, Nie K. The morphology and fabrication of nanostructured micelle by a novel block copolymer with linear-dendritic structure. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:2070-7. [PMID: 23498234 DOI: 10.1016/j.msec.2013.01.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 01/11/2013] [Accepted: 01/14/2013] [Indexed: 10/27/2022]
Abstract
We report here a novel approach to fabricate a nanostructured micelle as potential drug carriers and the relationship between the morphological structure and the preparation condition. The polymeric micelle aggregates constructed by self-assembly compose of the poly(ε-caprolactone)/monomethoxy poly(ethylene glycol) linear-dendritic block copolymers. The corresponding copolymers were synthesized by using ring opening polymerization of ε-caprolactone (CL) and a dendritic poly(ether-amide) (DPEA-OH) as an initiator, then coupling with the isocyanate end-capped linear monomethoxy polyethylene glycol. Fluorescence spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM) were performed to characterize the copolymer micelles. The critical micelle concentration (CMC) was determined to be 1.623 mg/L. The hydrodynamic radius (Rh) and the polydispersity index (PDI) are influenced by the concentration of the micelle solutions. The multiple morphologies of the micelle aggregates, including spheres, rob-like dendritic structure and vesicles were observed, which the variety depends on the various preparation conditions. The nanostructured micelles based on the linear-dendritic block copolymer possess the strong thermodynamic stability and the power of solubilization of hydrophobic drug molecules.
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Affiliation(s)
- Rulin Cai
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, College of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230039, China
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33
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Qiu H, Li D, Chen X, Fan K, Ou W, Chen KC, Xu K. Synthesis, characterizations, and biocompatibility of block poly(ester-urethane)s based on biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) and poly(ε-caprolactone). J Biomed Mater Res A 2012; 101:75-86. [PMID: 22826204 DOI: 10.1002/jbm.a.34302] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 05/23/2012] [Accepted: 05/24/2012] [Indexed: 11/06/2022]
Abstract
A type of block poly(ester-urethane)s (abbreviated as PUBC) based on bacterial copolyester poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) and biodegradable poly(ε-caprolactone) (PCL) was synthesized by melting polymerization using 1,6-hexamethylene diisocyanate (HDI) as the coupling agent, with different 3HB, 4HB and PCL contents and segment lengths. Stannous octanoate (Sn(Oct)(2)) was used as catalyst. The chemical structure, molecular weight and thermal property were characterized by (1)H NMR, FTIR GPC, DSC and TGA. DSC analysis revealed that the PUBC polyurethanes exhibit amorphous to semi-crystalline (20.9% crystallinity degree) with T(g) range from -39.7 to -21.5 °C. The hydrophilicity was investigated by static contact angle of deionized water and CH(2)I(2). The obtained PUBCs are hydrophobic (water contact angle 73.7-90.2°). Platelet adhesion study and plasma recalcification time revealed that the block polyurethanes possess hemastasis ability. CCK-8 assay illuminated that the no cytotoxic polyurethanes maintain rat aortic smooth muscle cells (RaSMCs) good viability. It was found that the 4HB content in the materials is an important factor to affect the sustainable cell viability.
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Affiliation(s)
- Handi Qiu
- Multidisciplinary Research Center, Shantou University, Shantou, Guangdong 515063, China
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34
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Li G, Liu Y, Li D, Zhang L, Xu K. A comparative study on structure-property elucidation of P3/4HB and PEG-based block polyurethanes. J Biomed Mater Res A 2012; 100:2319-29. [DOI: 10.1002/jbm.a.34173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 03/05/2012] [Accepted: 03/07/2012] [Indexed: 11/10/2022]
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35
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Yu HY, Qin ZY, Wang LF, Zhou Z. Crystallization behavior and hydrophobic properties of biodegradable ethyl cellulose-g-poly(3-hydroxybutyrate-co-3-hydroxyvalerate): The influence of the side-chain length and grafting density. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.11.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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36
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Zhou L, Chen Z, Chi W, Yang X, Wang W, Zhang B. Mono-methoxy-poly(3-hydroxybutyrate-co-4-hydroxybutyrate)-graft-hyper-branched polyethylenimine copolymers for siRNA delivery. Biomaterials 2012; 33:2334-44. [DOI: 10.1016/j.biomaterials.2011.11.060] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 11/22/2011] [Indexed: 12/17/2022]
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37
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Synthesis and physicochemical properties of new (bio)degradable poly(ester-urethane)s containing polylactide and poly[(1,4-butylene terephthalate)-co-(1,4-butylene adipate)] segments. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Li G, Li P, Qiu H, Li D, Su M, Xu K. Synthesis, characterizations and biocompatibility of alternating block polyurethanes based on P3/4HB and PPG-PEG-PPG. J Biomed Mater Res A 2011; 98:88-99. [PMID: 21538829 DOI: 10.1002/jbm.a.33100] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 02/22/2011] [Indexed: 11/07/2022]
Abstract
Block copolymers with exactly controlled structures, that is, alternating block polyurethanes based on poly(3-hydroxybutyrate-co-4-hydroxybutrate) (P3/4HB-diol) and poly (propylene glycol)-poly(ethylene glycol)-poly(propylene glycol) (PPG-PEG-PPG) were synthesized by solution polymerization via specifically selective coupling reaction between terminal hydroxyl P3/4HB segment and isocyanate group end-capped PPG-PEG-PPG segment, using 1,6-hexamethylene diisocyanate (HDI) as end-capped agent. The chemical structure, molecular weight and distribution were systematically characterized by nuclear magnetic resonance spectrum (¹H NMR), Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The thermal property was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis. The hydrophilicity was studied by static contact angle of H₂O and CH₂I₂. DSC revealed that the PU3/4HB-alt-PPG-PEG-PPG exhibited a distinct change from amorphous to 30% crystallinity degree, T(g) from -25 to -50 °C, T(m) from 110 to 145 °C. The polyurethanes were more hydrophilic (water contact angle centers around 80 °) than the raw PHA materials. The platelet adhesion assay showed that the obtained polyurethanes had a lower platelet adhesion than the raw materials and the amount of platelet adhesion could be controlled by varying the segmental length of P3/4HB-diol. This could be explained by the inclusion of PPG-PEG-PPG between the P3/4HB segments, improving the hemocompatibility of P3/4HB. The cell culture assay revealed that the obtained polyurethanes were cell inert and unfavorable for the attachment of mouse fibroblast cell line L929 and rabbit blood vessel smooth muscle cells (RaSMCs). This suggests that these polyurethanes would be promising candidates as hemocompatibility and tissue-inert materials.
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Affiliation(s)
- Guangyao Li
- Multidisciplinary Research Center, Shantou University, Daxue Lu 243, Shantou, Guangdong 515063, China
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39
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Ou W, Qiu H, Chen Z, Xu K. Biodegradable block poly(ester-urethane)s based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymers. Biomaterials 2011; 32:3178-88. [PMID: 21310479 DOI: 10.1016/j.biomaterials.2011.01.031] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Accepted: 01/12/2011] [Indexed: 12/24/2022]
Abstract
A series of block poly(ester-urethane)s (abbreviated as PU3/4HB) based on biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) segments were synthesized by a facile way of melting polymerization using 1,6-hexamethylene diisocyanate (HDI) as the coupling agent and stannous octanoate (Sn(Oct)(2)) as catalyst, with different 4HB contents and segment lengths. The chemical structure, molecular weight and distribution were systematically characterized by (1)H nuclear magnetic resonance spectrum (NMR), Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The thermal property was studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The hydrophilicity was investigated by static contact angle of deionized water and CH(2)I(2). DSC curves revealed that the PU3/4HB polyurethanes have their T(g) from -25.6 °C to -4.3 °C, and crystallinity from 2.5% to 25.3%, being almost amorphous to semi-crystalline. The obtained PU3/4HBs are hydrophobic (water contact angle 77.4°-95.9°), and their surface free energy (SFE) were studied. The morphology of platelets adhered on the polyurethane film observed by scanning electron microscope (SEM) showed that platelets were activated on the PU3/4HB films which would lead to blood coagulation. The lactate dehydrogenase (LDH) assay revealed that the PU3/4HBs displayed higher platelet adhesion property than raw materials and biodegradable polymer polylactic acid (PLA) and would be potential hemostatic materials. Crystallinity degree, hydrophobicity, surface free energy and urethane linkage content play important roles in affecting the LDH activity and hence the platelet adhesion. CCK-8 assay showed that the PU3/4HB is non-toxic and well for cell growth and proliferation of mouse fibroblast L929. It showed that the hydrophobicity is an important factor for cell growth while 3HB content of the PU3/4HB is important for the cell proliferation. Through changing the composition and the chain-length of P3/4HB-diol prepolymers, the biocompatibility of the poly(ester-urethane)s can be tailored.
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Affiliation(s)
- Wenfeng Ou
- Multidisciplinary Research Center, Shantou University, Daxue Lu 243, Shantou, Guangdong 515063, China
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40
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Liu KL, Choo ESG, Wong SY, Li X, He CB, Wang J, Li J. Designing poly[(R)-3-hydroxybutyrate]-based polyurethane block copolymers for electrospun nanofiber scaffolds with improved mechanical properties and enhanced mineralization capability. J Phys Chem B 2010; 114:7489-98. [PMID: 20469884 DOI: 10.1021/jp1018247] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Efforts to mineralize electrospun hydrophobic polyester scaffold often require prior surface modification such as plasma or alkaline treatment, which may affect the mechanical integrity of the resultant scaffold. Here through rational design we developed a series of polyurethane block copolymers containing poly[(R)-3-hydroxybutyrate] (PHB) as hard segment and poly(ethylene glycol) (PEG) as soft segment that could be easily fabricated into mineralizable electrospun scaffold without the need of additional surface treatment. To ensure that the block copolymers do not swell excessively in water, PEG content in the polymers was kept below 50 wt %. To obtain good dry and hydrated state mechanical properties with limited PEG, low-molecular-weight PHB-diol with M(n) 1230 and 1790 were used in various molar feed ratios. The macromolecular characteristics of the block copolymers were confirmed by (1)H NMR spectroscopy, gel permeation chromatography (GPC), and thermal gravimetric analyses (TGA). With the incorporation of the hydrophilic PEG segments, the surface and bulk hydrophilicity of the block copolymers were significantly improved. Differential scanning calorimetry (DSC) revealed that the block copolymers had low PHB crystallinity and no PEG crystallinity. This was further confirmed by X-ray diffraction analyses (XRD) in both dry and hydrated states. With short PHB segments and soft PEG coupled together, the block copolymers were no longer brittle. Tensile measurements showed that the block copolymers with higher PEG content or shorter PHB segments were more ductile. Furthermore, their ductility was enhanced in hydrated states with one particular example showing increment in strain at break from 1090 to 1962%. The block copolymers were fabricated into an electrospun fibrous scaffold that was easily mineralized by simple incubation in simulated body fluid. The materials have good potential for bone regeneration application and may be extended to other applications by simply coating them with other biologically active substances.
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Affiliation(s)
- Kerh Li Liu
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
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Wu L, Wang L, Wang X, Xu K. Synthesis, characterizations and biocompatibility of novel biodegradable star block copolymers based on poly[(R)-3-hydroxybutyrate] and poly(epsilon-caprolactone). Acta Biomater 2010; 6:1079-89. [PMID: 19671452 DOI: 10.1016/j.actbio.2009.08.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 06/24/2009] [Accepted: 08/07/2009] [Indexed: 10/20/2022]
Abstract
Star block copolymers based on poly[(R)-3-hydroxybutyrate] (PHB) and poly(epsilon-caprolactone) (PCL), termed SPHBCL, were successfully synthesized with structural variation on arm numbers and lengths via coupling reactions and ring opening polymerizations. Arm numbers 3, 4 and 6 of SPHBCL were synthesized by using different multifunctional cores, such as trimethyol propane, pentaerythiritol and dipentaerthritol, respectively. Gel permeation chromatography (GPC) and (1)H and (13)C nuclear magnetic resonance were used to characterize the structure of SPHBCL. GPC failed to produce accurate molecular weights of the SPHBCL due to the discrepancy of star copolymer structures. The melting temperature of SPHBCL decreased with increasing degree of branching. Thermal decomposition temperature was revealed to be lower than that of linear block copolymer LPHBCL counterparts based on PHB and PCL. Films made from various SPHBCL copolymers had different porous or networking surface morphology, and all possessed improved biocompatibility in terms of less blood clotting and more osteoblast cell growth compared with their corresponding homopolymers PHB and PCL. Among them, it was found, however, that the 4-arm star block copolymer 4SPHBCL-25 showed unique surface properties, i.e. a regular nanoravine structure was observed by scanning electron microscopy and atomic force microscopy. This 4-arm star copolymer also showed the best biocompatibility.
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Tran RT, Thevenot P, Gyawali D, Chiao JC, Tang L, Yang J. Synthesis and characterization of a biodegradable elastomer featuring a dual crosslinking mechanism. SOFT MATTER 2010; 6:2449-2461. [PMID: 22162975 PMCID: PMC3233194 DOI: 10.1039/c001605e] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The need for advanced materials in emerging technologies such as tissue engineering has prompted increased research to produce novel biodegradable polymers elastic in nature and mechanically compliant with the host tissue. We have developed a soft biodegradable elastomeric platform biomaterial created from citric acid, maleic anhydride, and 1,8-octanediol, poly(octamethylene maleate (anhydride) citrate) (POMaC), which is able to closely mimic the mechanical properties of a wide range of soft biological tissues. POMaC features a dual crosslinking mechanism, which allows for the option of the crosslinking POMaC using UV irradiation and/or polycondensation to fit the needs of the intended application. The material properties, degradation profiles, and functionalities of POMaC thermoset networks can all be tuned through the monomer ratios and the dual crosslinking mechanism. POMaC polymers displayed an initial modulus between 0.03 and 1.54 MPa, and elongation at break between 48% and 534% strain. In vitro and in vivo evaluation using cell culture and subcutaneous implantation, respectively, confirmed cell and tissue biocompatibility. POMaC biodegradable polymers can also be combined with MEMS technology to fabricate soft and elastic 3D microchanneled scaffolds for tissue engineering applications. The introduction of POMaC will expand the choices of available biodegradable polymeric elastomers. The dual crosslinking mechanism for biodegradable elastomer design should contribute to biomaterials science.
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Affiliation(s)
- Richard T. Tran
- Department of Bioengineering, The University of Texas, Arlington, TX, 76019, USA; Fax: +817-272-2251; Tel: +817-272-0561
| | - Paul Thevenot
- Department of Bioengineering, The University of Texas, Arlington, TX, 76019, USA; Fax: +817-272-2251; Tel: +817-272-0561
| | - Dipendra Gyawali
- Department of Bioengineering, The University of Texas, Arlington, TX, 76019, USA; Fax: +817-272-2251; Tel: +817-272-0561
| | - Jung-Chih Chiao
- Department of Electrical Engineering, The University of Texas, Arlington, TX, 76019, USA
| | - Liping Tang
- Department of Bioengineering, The University of Texas, Arlington, TX, 76019, USA; Fax: +817-272-2251; Tel: +817-272-0561
| | - Jian Yang
- Department of Bioengineering, The University of Texas, Arlington, TX, 76019, USA; Fax: +817-272-2251; Tel: +817-272-0561
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Pan J, Li G, Chen Z, Chen X, Zhu W, Xu K. Alternative block polyurethanes based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and poly(ethylene glycol). Biomaterials 2009; 30:2975-84. [PMID: 19230967 DOI: 10.1016/j.biomaterials.2009.02.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Accepted: 02/03/2009] [Indexed: 10/21/2022]
Abstract
A series of amphiphilic alternative block polyurethane copolymers based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) and poly(ethylene glycol) (PEG) were synthesized by a coupling reaction between P3/4HB-diol and PEG-diisocyanate, with different 3HB, 4HB, PEG compositions and segment lengths. Stannous octanoate was used as catalyst. The chemical structure, alternative block arrangement, molecular weight and distribution were systematically characterized by FTIR, (1)H NMR, GPC and composition analysis. The thermal property was studied by DSC and TGA. Platelet adhesion study revealed that the alternative block polyurethanes possess excellent hemocompatibility. CCK-8 assay illuminated that the non-toxic block polyurethanes maintain rat aortic smooth muscle cells (RaSMCs) good viability. The in-vitro degradation of the copolymers in PBS buffer solution and in lipase buffer medium was investigated. Results showed that the copolymer films exhibit different degradation patterns in different media from surface erosion to diffusion bulk collapsing. The synthetic methodology for the alternative block polyurethanes provides a way to control the exact structure of the biomaterials and tailor the properties to subtle requirements.
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Affiliation(s)
- Jueyu Pan
- Multidisciplinary Research Center, Shantou University, Daxue Lu 243, Shantou, Guangdong 515063, China
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