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Song R, Murphy M, Li C, Ting K, Soo C, Zheng Z. Current development of biodegradable polymeric materials for biomedical applications. Drug Des Devel Ther 2018; 12:3117-3145. [PMID: 30288019 PMCID: PMC6161720 DOI: 10.2147/dddt.s165440] [Citation(s) in RCA: 382] [Impact Index Per Article: 63.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In the last half-century, the development of biodegradable polymeric materials for biomedical applications has advanced significantly. Biodegradable polymeric materials are favored in the development of therapeutic devices, including temporary implants and three-dimensional scaffolds for tissue engineering. Further advancements have occurred in the utilization of biodegradable polymeric materials for pharmacological applications such as delivery vehicles for controlled/sustained drug release. These applications require particular physicochemical, biological, and degradation properties of the materials to deliver effective therapy. As a result, a wide range of natural or synthetic polymers able to undergo hydrolytic or enzymatic degradation is being studied for biomedical applications. This review outlines the current development of biodegradable natural and synthetic polymeric materials for various biomedical applications, including tissue engineering, temporary implants, wound healing, and drug delivery.
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Affiliation(s)
- Richard Song
- Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, CA, USA,
| | - Maxwell Murphy
- Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, CA, USA,
| | - Chenshuang Li
- Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, CA, USA,
| | - Kang Ting
- Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, CA, USA,
- UCLA Department of Surgery and Department of Orthopaedic Surgery and The Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, CA, USA,
- UCLA Department of Bioengineering, School of Engineering, University of California, Los Angeles, Los Angeles, CA, USA
| | - Chia Soo
- UCLA Department of Surgery and Department of Orthopaedic Surgery and The Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, CA, USA,
| | - Zhong Zheng
- Division of Growth and Development, Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, CA, USA,
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Gao J, Guo H, Tian S, Qiao Y, Han J, Li Y, Wang L. Preparation and mechanical performance of small-diameter PHBHHx vascular graft by electrospinning. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1473865] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jing Gao
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
| | - Huiwen Guo
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
| | - Shunzhu Tian
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
| | - Yansha Qiao
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
| | - Jiarui Han
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
| | - Yuling Li
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
| | - Lu Wang
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, People’s Republic of China
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Value-Added Products Derived from Waste Activated Sludge: A Biorefinery Perspective. WATER 2018. [DOI: 10.3390/w10050545] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Potential of Electrospun Poly(3-hydroxybutyrate)/Collagen Blends for Tissue Engineering Applications. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:6573947. [PMID: 29850000 PMCID: PMC5933042 DOI: 10.1155/2018/6573947] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 03/28/2018] [Indexed: 12/13/2022]
Abstract
In this work, tunable nonwoven mats based on poly(3-hydroxybutyrate) (PHB) and type I collagen (Coll) were successfully produced by electrospinning. The PHB/Coll weight ratio (fixed at 100/0, 70/30, and 50/50, resp.) was found to control the morphological, thermal, mechanical, and degradation properties of the mats. Increasing collagen amounts led to larger diameters of the fibers (in the approximate range 600-900 nm), while delaying their thermal decomposition (from 245°C to 262°C). Collagen also accelerated the hydrolytic degradation of the mats upon incubation in aqueous medium at 37°C for 23 days (with final weight losses of 1%, 15%, and 23% for 100/0, 70/30, and 50/50 samples, resp.), as a result of increased mat wettability and reduced PHB crystallinity. Interestingly, 70/30 meshes were the ones displaying the lowest stiffness (~116 MPa; p < 0.05 versus 100/0 and 50/50 meshes), while 50/50 samples had an elastic modulus comparable to that of 100/0 ones (~250 MPa), likely due to enhanced physical crosslinking of the collagen chains, at least at high protein amounts. All substrates were also found to allow for good viability and proliferation of murine fibroblasts, up to 6 days of culture. Collectively, the results evidenced the potential of as-spun PHB/Coll meshes for tissue engineering applications.
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Juengert JR, Bresan S, Jendrossek D. Determination of Polyhydroxybutyrate (PHB) Content in Ralstonia eutropha Using Gas Chromatography and Nile Red Staining. Bio Protoc 2018; 8:e2748. [PMID: 34179275 DOI: 10.21769/bioprotoc.2748] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 02/12/2018] [Accepted: 02/15/2018] [Indexed: 01/22/2023] Open
Abstract
Ralstonia eutropha H16 produces and mobilizes (re-utilizes) intracellular polyhydroxybutyrate (PHB) granules during growth. This protocol describes the visualization of intracellular Nile red stained PHB granules and the quantification of PHB by gas chromatography. Our first method describes how to analyze PHB granules by fluorescence microscopy qualitatively. Our second approach enables the conversion of PHB to volatile hydroxycarboxylic acid methyl esters by acidic methanolysis and their quantification by gas chromatography. Through this method, it is possible to obtain an absolute quantification of PHB, e.g., per cell dry weight.
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Affiliation(s)
- Janina R Juengert
- Institute of Microbiology, University of Stuttgart, Stuttgart, Germany
| | - Stephanie Bresan
- Institute of Microbiology, University of Stuttgart, Stuttgart, Germany
| | - Dieter Jendrossek
- Institute of Microbiology, University of Stuttgart, Stuttgart, Germany
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Cui YH, Wei P, Peng F, Zong MH, Lou WY. Efficient biocatalytic stereoselective reduction of methyl acetoacetate catalyzed by whole cells of engineered E. coli. RSC Adv 2018; 8:9970-9978. [PMID: 35540821 PMCID: PMC9078740 DOI: 10.1039/c8ra00883c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 02/27/2018] [Indexed: 12/03/2022] Open
Abstract
Asymmetric synthesis of chiral β-hydroxy esters, the key building blocks for many functional materials, is currently of great interest. In this study, the biocatalytic anti-Prelog reduction of methyl acetoacetate (MAA) to methyl-(R)-3-hydroxybutyrate ((R)-HBME) was successfully carried out with high enantioselectivity using the whole cell of engineered E. coli, which harbored an AcCR (carbonyl reductase) gene from Acetobacter sp. CCTCC M209061 and a GDH (glucose dehydrogenase) gene from Bacillus subtilis 168 for the in situ regeneration of the coenzyme. Compared with the corresponding wild strain, the engineered E. coli cells were proved to be more effective for the bio-reduction of MAA, and afforded much higher productivity. Under the optimized conditions, the product e.e. was >99.9% and the maximum yield was 85.3% after a reaction time of 10 h, which were much higher than those reported previously. In addition, the production of (R)-HBME increased significantly by using a fed-batch strategy of tuning pH, with a space-time yield of approximately 265 g L-1 d-1, thus the issue in previous research of relatively low substrate concentrations appears to be solved. Besides, the established bio-catalytic system was proved to be feasible up to a 150 mL scale with a large-scale relatively high substrate concentration and selectivity. For further industrial application, these results open a way to use of whole cells of engineered E. coli for challenging higher substrate concentrations of β-ketone esters enantioselective reduction reactions.
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Affiliation(s)
- Y H Cui
- Lab of Applied Biocatalysis, School of Food Science and Technology, South China University of Technology Guangzhou 510640 Guangdong China +86-20-22236669
| | - P Wei
- Lab of Applied Biocatalysis, School of Food Science and Technology, South China University of Technology Guangzhou 510640 Guangdong China +86-20-22236669
- School of Chemistry and Chemical Engineering, South China University of Technology Guangzhou 510640 Guangdong China
| | - F Peng
- Lab of Applied Biocatalysis, School of Food Science and Technology, South China University of Technology Guangzhou 510640 Guangdong China +86-20-22236669
| | - M H Zong
- Lab of Applied Biocatalysis, School of Food Science and Technology, South China University of Technology Guangzhou 510640 Guangdong China +86-20-22236669
- School of Chemistry and Chemical Engineering, South China University of Technology Guangzhou 510640 Guangdong China
| | - W Y Lou
- Lab of Applied Biocatalysis, School of Food Science and Technology, South China University of Technology Guangzhou 510640 Guangdong China +86-20-22236669
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology Guangzhou 510640 Guangdong China
- School of Chemistry and Chemical Engineering, South China University of Technology Guangzhou 510640 Guangdong China
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Inactivation of an intracellular poly-3-hydroxybutyrate depolymerase of Azotobacter vinelandii allows to obtain a polymer of uniform high molecular mass. Appl Microbiol Biotechnol 2018; 102:2693-2707. [DOI: 10.1007/s00253-018-8806-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 01/16/2018] [Accepted: 01/18/2018] [Indexed: 01/20/2023]
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Yi Y, Lin G, Chen S, Liu J, Zhang H, Mi P. Polyester micelles for drug delivery and cancer theranostics: Current achievements, progresses and future perspectives. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 83:218-232. [DOI: 10.1016/j.msec.2017.10.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 12/14/2022]
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Myung J, Flanagan JCA, Waymouth RM, Criddle CS. Expanding the range of polyhydroxyalkanoates synthesized by methanotrophic bacteria through the utilization of omega-hydroxyalkanoate co-substrates. AMB Express 2017; 7:118. [PMID: 28587442 PMCID: PMC5459778 DOI: 10.1186/s13568-017-0417-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 05/28/2017] [Indexed: 01/06/2023] Open
Abstract
The first methanotrophic syntheses of polyhydroxyalkanoates (PHAs) that contain repeating units beyond 3-hydroxybutyrate and 3-hydroxyvalerate are reported. New PHAs synthesized by methanotrophs include poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-co-4HB)), poly(3-hydroxybutyrate-co-5-hydroxyvalerate-co-3-hydroxyvalerate) (P(3HB-co-5HV-co-3HV)), and poly(3-hydroxybutyrate-co-6-hydroxyhexanoate-co-4-hydroxybutyrate) (P(3HB-co-6HHx-co-4HB)). This was achieved from a pure culture of Methylocystis parvus OBBP where the primary substrate is methane and the corresponding ω-hydroxyalkanoate monomers are added as a co-substrate after the cells are subjected to nitrogen-limited conditions.
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Marcano A, Bou Haidar N, Marais S, Valleton JM, Duncan AC. Designing Biodegradable PHA-Based 3D Scaffolds with Antibiofilm Properties for Wound Dressings: Optimization of the Microstructure/Nanostructure. ACS Biomater Sci Eng 2017; 3:3654-3661. [DOI: 10.1021/acsbiomaterials.7b00552] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Aracelys Marcano
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Naila Bou Haidar
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Stéphane Marais
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Jean-Marc Valleton
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Anthony C. Duncan
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
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Nielsen C, Rahman A, Rehman AU, Walsh MK, Miller CD. Food waste conversion to microbial polyhydroxyalkanoates. Microb Biotechnol 2017; 10:1338-1352. [PMID: 28736901 PMCID: PMC5658610 DOI: 10.1111/1751-7915.12776] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 06/17/2017] [Indexed: 12/16/2022] Open
Abstract
Polyhydroxyalkanoates (PHAs) are biopolymers with desirable material properties similar to petrochemically derived plastics. PHAs are naturally produced by a wide range of microorganisms as a carbon storage mechanism and can accumulate to significantly high levels. PHAs are an environmentally friendly alternative to their petroleum counterparts because they can be easily degraded, potentially reducing the burden on municipal waste systems. Nevertheless, widespread use of PHAs is not currently realistic due to a variety of factors. One of the major constraints of large-scale PHA production is the cost of carbon substrate for PHA-producing microbes. The cost of production could potentially be reduced with the use of waste carbon from food-related processes. Food wastage is a global issue and therefore harbours immense potential to create valuable bioproducts. This article's main focus is to examine the state of the art of converting food-derived waste into carbon substrates for microbial metabolism and subsequent conversion into PHAs.
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Affiliation(s)
- Chad Nielsen
- Department of Biological EngineeringUtah State University4105 Old Main HillLoganUT84322‐4105USA
| | - Asif Rahman
- Bioengineering BranchSpace BioSciences DivisionNASA Ames Research CenterMoffett FieldCA94035‐1000USA
- COSMIAC Research CenterUniversity of New MexicoAlbuquerqueNM87106USA
| | - Asad Ur Rehman
- Department of Biological EngineeringUtah State University4105 Old Main HillLoganUT84322‐4105USA
- Institute of Industrial BiotechnologyGovernment College UniversityKatchery RoadLahorePakistan
| | - Marie K. Walsh
- Department of Nutrition, Dietetics, and Food SciencesUtah State University8700 Old Main HillLoganUT84322‐8700USA
| | - Charles D. Miller
- Department of Biological EngineeringUtah State University4105 Old Main HillLoganUT84322‐4105USA
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Maestro B, Sanz JM. Polyhydroxyalkanoate-associated phasins as phylogenetically heterogeneous, multipurpose proteins. Microb Biotechnol 2017; 10:1323-1337. [PMID: 28425176 PMCID: PMC5658603 DOI: 10.1111/1751-7915.12718] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/19/2017] [Accepted: 03/22/2017] [Indexed: 01/01/2023] Open
Abstract
Polyhydroxyalkanoates (PHAs) are natural polyesters of increasing biotechnological importance that are synthesized by many prokaryotic organisms as carbon and energy storage compounds in limiting growth conditions. PHAs accumulate intracellularly in form of inclusion bodies that are covered with a proteinaceous surface layer (granule-associated proteins or GAPs) conforming a network-like surface of structural, metabolic and regulatory polypeptides, and configuring the PHA granules as complex and well-organized subcellular structures that have been designated as 'carbonosomes'. GAPs include several enzymes related to PHA metabolism (synthases, depolymerases and hydroxylases) together with the so-called phasins, an heterogeneous group of small-size proteins that cover most of the PHA granule and that are devoid of catalytic functions but nevertheless play an essential role in granule structure and PHA metabolism. Structurally, phasins are amphiphilic proteins that shield the hydrophobic polymer from the cytoplasm. Here, we summarize the characteristics of the different phasins identified so far from PHA producer organisms and highlight the diverse opportunities that they offer in the Biotechnology field.
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Affiliation(s)
- Beatriz Maestro
- Instituto de Biología Molecular y CelularUniversidad Miguel HernándezAv. Universidad s/nElche03202Spain
| | - Jesús M. Sanz
- Instituto de Biología Molecular y CelularUniversidad Miguel HernándezAv. Universidad s/nElche03202Spain
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Barouti G, Jaffredo CG, Guillaume SM. Advances in drug delivery systems based on synthetic poly(hydroxybutyrate) (co)polymers. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2017.05.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Generali M, Kehl D, Capulli AK, Parker KK, Hoerstrup SP, Weber B. Comparative analysis of poly-glycolic acid-based hybrid polymer starter matrices for in vitro tissue engineering. Colloids Surf B Biointerfaces 2017; 158:203-212. [DOI: 10.1016/j.colsurfb.2017.06.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/23/2017] [Accepted: 06/28/2017] [Indexed: 12/11/2022]
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Thorat Gadgil BS, Killi N, Rathna GVN. Polyhydroxyalkanoates as biomaterials. MEDCHEMCOMM 2017; 8:1774-1787. [PMID: 30108887 PMCID: PMC6084198 DOI: 10.1039/c7md00252a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 06/23/2017] [Indexed: 12/18/2022]
Abstract
Polyhydroxyalkanoates (PHAs) are biopolymers synthesized by bacteria under unbalanced growth conditions. These biopolymers are considered as potential biomaterials for future applications because they are biocompatible, biodegradable, and easy to produce and functionalize with strong mechanical strength. Currently, PHAs are being extensively innovated for biomedical applications due to their prerequisite properties. The wide range of biomedical applications includes drug delivery systems, implants, tissue engineering, scaffolds, artificial organ constructs, etc. In this article we review the utility of PHAs in various forms (bulk/nano) for biomedical applications so as to bring about the future vision for PHAs as biomaterials for the advancement of research and technology.
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Affiliation(s)
- Bhagyashri S Thorat Gadgil
- Polymer Science and Engineering division , CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pashan , Pune , 411008 India .
| | - Naresh Killi
- Polymer Science and Engineering division , CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pashan , Pune , 411008 India .
| | - Gundloori V N Rathna
- Polymer Science and Engineering division , CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pashan , Pune , 411008 India .
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Jaganathan SK, M MP, Fauzi Ismail A, A M, N G. Production and hemocompatibility assessment of novel electrospun polyurethane nanofibers loaded with dietary virgin coconut oil for vascular graft applications. J BIOACT COMPAT POL 2017. [DOI: 10.1177/0883911517720815] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
To develop biodegradable polymer scaffolds suitable for vascular tissue engineering applications, the bioengineering community has invested an extensive effort. The most common cause for the failure of vascular graft scaffolds is thrombosis. In this work, the scaffold based on polyurethane and virgin coconut oil was produced by electrospinning process for vascular tissue engineering applications with improved antithrombogenicity. The diameter of this electrospun polyurethane/virgin coconut oil composite was found to be reduced in the range of 886 ± 207 nm compared to pristine polyurethane which was in the range of 969 ± 217 nm. The Fourier transform infrared spectroscopy analysis revealed the interaction between polyurethane and virgin coconut oil as indicated by phase shifting of CH bond along with the formation of hydrogen bond. The contact angle measurement of fabricated composites was found to be increased owing to hydrophobic nature and also exhibited enhanced thermal stability as noted in thermogravimetric analysis. The atomic force microscopy analysis insinuated the increased surface roughness of the composite in comparison with the pure polyurethane. Developed scaffold resulted in delayed blood clotting as revealed by activated partial thromboplastin time and partial thromboplastin time assay. The hemolytic index of fabricated composites was found to be low indicating the enhanced safety of red blood cells. Hence, the newly developed nanofibrous composite scaffold could open the door for a suitable alternative for vascular graft applications.
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Affiliation(s)
- Saravana Kumar Jaganathan
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- IJN-UTM Cardiovascular Engineering Center, Department of Clinical Sciences, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Skudai 81300, Johor, Malaysia
| | - Mohan Prasath M
- Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Skudai 81300, Johor, Malaysia
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Skudai 81310, Johor, Malaysia
| | - Manikandan A
- Department of Chemistry, Bharath Institute of Higher Education and Research, Bharath University Chennai 600073, Tamil Nadu, India
| | - Gomathi N
- Department of Chemistry, Indian Institute of Space Science and Technology, Thiruvananthapuram 695547, India
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Absence of ppGpp Leads to Increased Mobilization of Intermediately Accumulated Poly(3-Hydroxybutyrate) in Ralstonia eutropha H16. Appl Environ Microbiol 2017; 83:AEM.00755-17. [PMID: 28455332 DOI: 10.1128/aem.00755-17] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 04/24/2017] [Indexed: 01/21/2023] Open
Abstract
In this study, we constructed a set of Ralstonia eutropha H16 strains with single, double, or triple deletions of the (p)ppGpp synthase/hydrolase (spoT1), (p)ppGpp synthase (spoT2), and/or polyhydroxybutyrate (PHB) depolymerase (phaZa1 or phaZa3) gene, and we determined the impact on the levels of (p)ppGpp and on accumulated PHB. Mutants with deletions of both the spoT1 and spoT2 genes were unable to synthesize detectable amounts of (p)ppGpp and accumulated only minor amounts of PHB, due to PhaZa1-mediated depolymerization of PHB. In contrast, unusually high levels of PHB were found in strains in which the (p)ppGpp concentration was increased by the overexpression of (p)ppGpp synthase (SpoT2) and the absence of (p)ppGpp hydrolase. Determination of (p)ppGpp levels in wild-type R. eutropha under different growth conditions and induction of the stringent response by amino acid analogs showed that the concentrations of (p)ppGpp during the growth phase determine the amount of PHB remaining in later growth phases by influencing the efficiency of the PHB mobilization system in stationary growth. The data reported for a previously constructed ΔspoT2 strain (C. J. Brigham, D. R. Speth, C. Rha, and A. J. Sinskey, Appl Environ Microbiol 78:8033-8044, 2012, https://doi.org/10.1128/AEM.01693-12) were identified as due to an experimental error in strain construction, and our results are in contrast to the previous indication that the spoT2 gene product is essential for PHB accumulation in R. eutrophaIMPORTANCE Polyhydroxybutyrate (PHB) is an important intracellular carbon and energy storage compound in many prokaryotes and helps cells survive periods of starvation and other stress conditions. Research activities in several laboratories over the past 3 decades have shown that both PHB synthase and PHB depolymerase are constitutively expressed in most PHB-accumulating bacteria, such as Ralstonia eutropha This implies that PHB synthase and depolymerase activities must be well regulated in order to avoid a futile cycle of simultaneous PHB synthesis and PHB degradation (mobilization). Previous reports suggested that the stringent response in Rhizobium etli and R. eutropha is involved in the regulation of PHB metabolism. However, the levels of (p)ppGpp and the influence of those levels on PHB accumulation and PHB mobilization have not yet been determined for any PHB-accumulating species. In this study, we optimized a (p)ppGpp extraction procedure and a high-performance liquid chromatography-mass spectrometry (HPLC-MS)-based detection method for the quantification of (p)ppGpp in R. eutropha This enabled us to study the relationship between the concentrations of (p)ppGpp and the accumulated levels of PHB in the wild type and in several constructed mutant strains. We show that overproduction of the alarmone (p)ppGpp correlated with reduced growth and massive overproduction of PHB. In contrast, in the absence of (p)ppGpp, mobilization of PHB was dramatically enhanced.
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Muthuraj R, Misra M, Mohanty AK. Reactive compatibilization and performance evaluation of miscanthus biofiber reinforced poly(hydroxybutyrate-co-hydroxyvalerate) biocomposites. J Appl Polym Sci 2017. [DOI: 10.1002/app.44860] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Rajendran Muthuraj
- School of Engineering; Thornbrough Building, University of Guelph; 50 Stone Road East Guelph Ontario N1G2W1 Canada
- Bioproducts Discovery and Development Centre (BDDC); Crop Science Building, Department of Plant Agriculture, University of Guelph; 50 Stone Road East Guelph Ontario N1G2W1 Canada
| | - Manjusri Misra
- School of Engineering; Thornbrough Building, University of Guelph; 50 Stone Road East Guelph Ontario N1G2W1 Canada
- Bioproducts Discovery and Development Centre (BDDC); Crop Science Building, Department of Plant Agriculture, University of Guelph; 50 Stone Road East Guelph Ontario N1G2W1 Canada
| | - Amar Kumar Mohanty
- School of Engineering; Thornbrough Building, University of Guelph; 50 Stone Road East Guelph Ontario N1G2W1 Canada
- Bioproducts Discovery and Development Centre (BDDC); Crop Science Building, Department of Plant Agriculture, University of Guelph; 50 Stone Road East Guelph Ontario N1G2W1 Canada
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Michalak M, Kurcok P, Hakkarainen M. Polyhydroxyalkanoate-based drug delivery systems. POLYM INT 2016. [DOI: 10.1002/pi.5282] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Michał Michalak
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; M Curie-Skłodowskiej 34 41-819 Zabrze Poland
| | - Piotr Kurcok
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; M Curie-Skłodowskiej 34 41-819 Zabrze Poland
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm Sweden
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Kang J, Gi H, Choe R, Yun SI. Fabrication and characterization of poly(3-hydroxybutyrate) gels using non-solvent-induced phase separation. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.093] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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71
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Vene E, Barouti G, Jarnouen K, Gicquel T, Rauch C, Ribault C, Guillaume SM, Cammas-Marion S, Loyer P. Opsonisation of nanoparticles prepared from poly(β-hydroxybutyrate) and poly(trimethylene carbonate)-b-poly(malic acid) amphiphilic diblock copolymers: Impact on the in vitro cell uptake by primary human macrophages and HepaRG hepatoma cells. Int J Pharm 2016; 513:438-452. [PMID: 27640247 DOI: 10.1016/j.ijpharm.2016.09.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/12/2016] [Accepted: 09/14/2016] [Indexed: 12/18/2022]
Abstract
The present work reports the investigation of the biocompatibility, opsonisation and cell uptake by human primary macrophages and HepaRG cells of nanoparticles (NPs) formulated from poly(β-malic acid)-b-poly(β-hydroxybutyrate) (PMLA-b-PHB) and poly(β-malic acid)-b-poly(trimethylene carbonate) (PMLA-b-PTMC) diblock copolymers, namely PMLA800-b-PHB7300, PMLA4500-b-PHB4400, PMLA2500-b-PTMC2800 and PMLA4300-b-PTMC1400. NPs derived from PMLA-b-PHB and PMLA-b-PTMC do not trigger lactate dehydrogenase release and do not activate the secretion of pro-inflammatory cytokines demonstrating the excellent biocompatibility of these copolymers derived nano-objects. Using a protein adsorption assay, we demonstrate that the binding of plasma proteins is very low for PMLA-b-PHB-based nano-objects, and higher for those prepared from PMLA-b-PTMC copolymers. Moreover, a more efficient uptake by macrophages and HepaRG cells is observed for NPs formulated from PMLA-b-PHB copolymers compared to that of PMLA-b-PTMC-based NPs. Interestingly, the uptake in HepaRG cells of NPs formulated from PMLA800-b-PHB7300 is much higher than that of NPs based on PMLA4500-b-PHB4400. In addition, the cell internalization of PMLA800-b-PHB7300 based-NPs, probably through endocytosis, is strongly increased by serum pre-coating in HepaRG cells but not in macrophages. Together, these data strongly suggest that the binding of a specific subset of plasmatic proteins onto the PMLA800-b-PHB7300-based NPs favors the HepaRG cell uptake while reducing that of macrophages.
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Affiliation(s)
- Elise Vene
- INSERM UMR S-991, Foie, Métabolismes et Cancer; Université de Rennes 1; CHU Pontchaillou Rennes, 35033 Rennes, France
| | - Ghislaine Barouti
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1, Campus de Beaulieu, 263 Avenue du Général Leclerc, F-35042 Rennes Cedex, France
| | - Kathleen Jarnouen
- INSERM UMR S-991, Foie, Métabolismes et Cancer; Université de Rennes 1; CHU Pontchaillou Rennes, 35033 Rennes, France
| | - Thomas Gicquel
- INSERM UMR S-991, Foie, Métabolismes et Cancer; Université de Rennes 1; CHU Pontchaillou Rennes, 35033 Rennes, France
| | - Claudine Rauch
- INSERM UMR S-991, Foie, Métabolismes et Cancer; Université de Rennes 1; CHU Pontchaillou Rennes, 35033 Rennes, France
| | - Catherine Ribault
- INSERM UMR S-991, Foie, Métabolismes et Cancer; Université de Rennes 1; CHU Pontchaillou Rennes, 35033 Rennes, France
| | - Sophie M Guillaume
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1, Campus de Beaulieu, 263 Avenue du Général Leclerc, F-35042 Rennes Cedex, France
| | - Sandrine Cammas-Marion
- Ecole Nationale Supérieure de Chimie de Rennes, Institute des Sciences Chimiques de Rennes, Université de Rennes 1, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France
| | - Pascal Loyer
- INSERM UMR S-991, Foie, Métabolismes et Cancer; Université de Rennes 1; CHU Pontchaillou Rennes, 35033 Rennes, France.
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72
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Mokhtarzadeh A, Alibakhshi A, Hejazi M, Omidi Y, Ezzati Nazhad Dolatabadi J. Bacterial-derived biopolymers: Advanced natural nanomaterials for drug delivery and tissue engineering. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.06.013] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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73
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Insomphun C, Chuah JA, Kobayashi S, Fujiki T, Numata K. Influence of Hydroxyl Groups on the Cell Viability of Polyhydroxyalkanoate (PHA) Scaffolds for Tissue Engineering. ACS Biomater Sci Eng 2016; 3:3064-3075. [DOI: 10.1021/acsbiomaterials.6b00279] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chayatip Insomphun
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Jo-Ann Chuah
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Shingo Kobayashi
- Kaneka Corporation, 1-8 Miyamae-cho,
Takasago-cho, Takasago, Hyogo 676-8688, Japan
| | - Tetsuya Fujiki
- Kaneka Corporation, 1-8 Miyamae-cho,
Takasago-cho, Takasago, Hyogo 676-8688, Japan
| | - Keiji Numata
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
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74
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Hong PH, Zhang J, Liu XJ, Tan TW, Li ZJ. Effect of NADH kinase on poly-3-hydroxybutyrate production by recombinant Escherichia coli. J Biosci Bioeng 2016; 122:685-688. [PMID: 27353858 DOI: 10.1016/j.jbiosc.2016.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 06/09/2016] [Indexed: 11/19/2022]
Abstract
The cofactor NADPH participates in a variety of anabolic reactions and its availability is considered to play a critical role in biotransformation processes. NADH kinase (Pos5) from Saccharomyces cerevisiae catalyzes the phosphorylation of NADH to generate NADPH. To investigate the effect of NADH kinase on poly-3-hydroxybutyrate (PHB) production, pos5 was co-expressed with PHB synthetic operon phbCAB in Escherichia coli. The recombinant strain carrying pos5 and phbCAB co-expression plasmid reached 5.96 g/L cell dry weight with 64.1% PHB accumulation in 72 h shake flask cultivation, while the control strain without pos5 yielded 3.93 g/L cell dry weight with 58.5% PHB content. PHB production titer was enhanced from 2.30 g/L to 3.82 g/L. Intracellular cofactor concentration analysis revealed that the ratio of NADP/NAD in pos5 overexpression strain was two times more compared with that of the control without pos5. The results showed that NADH kinase could be employed as an effective metabolic manipulation target to improve PHB synthesis.
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Affiliation(s)
- Peng-Hui Hong
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Jie Zhang
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xiao-Jie Liu
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Tian-Wei Tan
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Zheng-Jun Li
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
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75
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Oxidized Polyethylene Wax as a Potential Carbon Source for PHA Production. MATERIALS 2016; 9:ma9050367. [PMID: 28773492 PMCID: PMC5503007 DOI: 10.3390/ma9050367] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/11/2016] [Accepted: 05/09/2016] [Indexed: 01/19/2023]
Abstract
We report on the ability of bacteria to produce biodegradable polyhydroxyalkanoates (PHA) using oxidized polyethylene wax (O-PEW) as a novel carbon source. The O-PEW was obtained in a process that used air or oxygen as an oxidizing agent. R. eutropha H16 was grown for 48 h in either tryptone soya broth (TSB) or basal salts medium (BSM) supplemented with O-PEW and monitored by viable counting. Study revealed that biomass and PHA production was higher in TSB supplemented with O-PEW compared with TSB only. The biopolymers obtained were preliminary characterized by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The detailed structural evaluation at the molecular level was performed by electrospray ionization tandem mass spectrometry (ESI-MS/MS). The study revealed that, when TSB was supplemented with O-PEW, bacteria produced PHA which contained 3-hydroxybutyrate and up to 3 mol % of 3-hydroxyvalerate and 3-hydroxyhexanoate co-monomeric units. The ESI-MS/MS enabled the PHA characterization when the content of 3-hydroxybutyrate was high and the appearance of other PHA repeating units was very low.
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76
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77
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Ricapito NG, Ghobril C, Zhang H, Grinstaff MW, Putnam D. Synthetic Biomaterials from Metabolically Derived Synthons. Chem Rev 2016; 116:2664-704. [PMID: 26821863 PMCID: PMC5810137 DOI: 10.1021/acs.chemrev.5b00465] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The utility of metabolic synthons as the building blocks for new biomaterials is based on the early application and success of hydroxy acid based polyesters as degradable sutures and controlled drug delivery matrices. The sheer number of potential monomers derived from the metabolome (e.g., lactic acid, dihydroxyacetone, glycerol, fumarate) gives rise to almost limitless biomaterial structural possibilities, functionality, and performance characteristics, as well as opportunities for the synthesis of new polymers. This review describes recent advances in new chemistries, as well as the inventive use of traditional chemistries, toward the design and synthesis of new polymers. Specific polymeric biomaterials can be prepared for use in varied medical applications (e.g., drug delivery, tissue engineering, wound repair, etc.) through judicious selection of the monomer and backbone linkage.
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Affiliation(s)
- Nicole G. Ricapito
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Cynthia Ghobril
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Heng Zhang
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Mark W. Grinstaff
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Department of Medicine, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - David Putnam
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853, United States
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78
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Shijun X, Junsheng M, Jianqun Z, Ping B. In vitro three-dimensional coculturing poly3-hydroxybutyrate-co-3-hydroxyhexanoate with mouse-induced pluripotent stem cells for myocardial patch application. J Biomater Appl 2016; 30:1273-82. [PMID: 26873635 DOI: 10.1177/0885328215612115] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Identifying a suitable polymeric biomaterial for myocardial patch repair following myocardial infarction, cerebral infarction, and cartilage injury is essential. This study aimed to investigate the effect of the novel polymer material, poly3-hydroxybutyrate- co-3-hydroxyhexanoate, on the adhesion, proliferation, and differentiation of mouse-induced pluripotent stem cells in vitro. Mouse-induced pluripotent stem cells were isolated, expanded, and cultured on either two-dimensional or three-dimensional poly3-hydroxybutyrate- co-3-hydroxyhexanoate films (membranes were perforated to imitate three-dimensional space). Following attachment onto the films, mouse-induced pluripotent stem cell morphology was visualized using scanning electron microscopy. Cell vitality was detected using the Cell Counting Kit-8 assay and cell proliferation was observed using fluorescent 4',6-diamidino-2-phenylindole (DAPI) staining. Mouse-induced pluripotent stem cells were induced into cardiomyocytes by differentiation medium containing vitamin C. A control group in the absence of an inducer was included. Mouse-induced pluripotent stem cell survival and differentiation were observed using immunofluorescence and flow cytometry, respectively. Mouse-induced pluripotent stem cells growth, proliferation, and differentiation were observed on both two-dimensional and three-dimensional poly3-hydroxybutyrate- co-3-hydroxyhexanoate films. Vitamin C markedly improved the efficiency of mouse-induced pluripotent stem cells differentiation into cardiomyocytes on poly3-hydroxybutyrate- co-3-hydroxyhexanoate films. Three-dimensional culture was better at promoting mouse-induced pluripotent stem cell proliferation and differentiation compared with two-dimensional culture.
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Affiliation(s)
- Xu Shijun
- Department of Cardiac Surgery, Capital Medical University Affiliated Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, P.R. China
| | - Mu Junsheng
- Department of Cardiac Surgery, Capital Medical University Affiliated Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, P.R. China
| | - Zhang Jianqun
- Department of Cardiac Surgery, Capital Medical University Affiliated Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, P.R. China
| | - Bo Ping
- Department of Cardiac Surgery, Capital Medical University Affiliated Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, P.R. China
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79
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KÖSE S, AERTS KAYA F, DENKBAŞ EB, KORKUSUZ P, ÇETİNKAYA FD. Evaluation of biocompatibility of random or aligned electrospun polyhydroxybutyrate scaffolds combined with human mesenchymal stem cells. Turk J Biol 2016. [DOI: 10.3906/biy-1508-18] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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80
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Poly-ε-caprolactone Coated and Functionalized Porous Titanium and Magnesium Implants for Enhancing Angiogenesis in Critically Sized Bone Defects. Int J Mol Sci 2015; 17:ijms17010001. [PMID: 26703586 PMCID: PMC4730248 DOI: 10.3390/ijms17010001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/10/2015] [Accepted: 12/14/2015] [Indexed: 11/26/2022] Open
Abstract
For healing of critically sized bone defects, biocompatible and angiogenesis supporting implants are favorable. Murine osteoblasts showed equal proliferation behavior on the polymers poly-ε-caprolactone (PCL) and poly-(3-hydroxybutyrate)/poly-(4-hydroxybutyrate) (P(3HB)/P(4HB)). As vitality was significantly better for PCL, it was chosen as a suitable coating material for further experiments. Titanium implants with 600 µm pore size were evaluated and found to be a good implant material for bone, as primary osteoblasts showed a vitality and proliferation onto the implants comparable to well bottom (WB). Pure porous titanium implants and PCL coated porous titanium implants were compared using Live Cell Imaging (LCI) with Green fluorescent protein (GFP)-osteoblasts. Cell count and cell covered area did not differ between the implants after seven days. To improve ingrowth of blood vessels into porous implants, proangiogenic factors like Vascular Endothelial Growth Factor (VEGF) and High Mobility Group Box 1 (HMGB1) were incorporated into PCL coated, porous titanium and magnesium implants. An angiogenesis assay was performed to establish an in vitro method for evaluating the impact of metallic implants on angiogenesis to reduce and refine animal experiments in future. Incorporated concentrations of proangiogenic factors were probably too low, as they did not lead to any effect. Magnesium implants did not yield evaluable results, as they led to pH increase and subsequent cell death.
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81
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Marcano A, Ba O, Thebault P, Crétois R, Marais S, Duncan AC. Elucidation of innovative antibiofilm materials. Colloids Surf B Biointerfaces 2015; 136:56-63. [DOI: 10.1016/j.colsurfb.2015.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/16/2015] [Accepted: 08/05/2015] [Indexed: 01/08/2023]
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Khajavi R, Abbasipour M, Bahador A. Electrospun biodegradable nanofibers scaffolds for bone tissue engineering. J Appl Polym Sci 2015. [DOI: 10.1002/app.42883] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ramin Khajavi
- Nanotechnology Research Center, South Tehran Branch, Islamic Azad University; Tehran Iran
| | - Mina Abbasipour
- Department of Textile Engineering; Science and Research Branch, Islamic Azad University; Tehran Iran
| | - Abbas Bahador
- Department of Medical Microbiology, School of Medicine; Tehran University of Medical Sciences; Tehran Iran
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83
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Hazer B. Simple synthesis of amphiphilic poly(3-hydroxy alkanoate)s with pendant hydroxyl and carboxylic groups via thiol-ene photo click reactions. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.04.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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84
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Ganesh M, Senthamarai A, Shanmughapriya S, Natarajaseenivasan K. Effective production of low crystallinity Poly(3-hydroxybutyrate) by recombinant E. coli strain JM109 using crude glycerol as sole carbon source. BIORESOURCE TECHNOLOGY 2015; 192:677-681. [PMID: 26094193 DOI: 10.1016/j.biortech.2015.06.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 06/08/2015] [Accepted: 06/09/2015] [Indexed: 06/04/2023]
Abstract
Utilization of bio-diesel by-products (glycerol) for microbial polymer production has created a novel biorefinery concept. In the present study, recombinant Escherichia coli JM109 was used for the production of P(3 HB) from glycerol as carbon source. Batch fermentation in a 7.5L bioreactor with the statistically optimized culture condition (pre-treated glycerol: 27.5 g/L and casein hydrolysate: 5.25 g/L) scaled up the P3HB production to 65% (∼ 8 g/L). FTIR, (1)H and (13)C NMR analysis proved the polymer produced to be P(3 HB). Gel permeation chromatography, Differential Scanning Calorimetry (DSC) and thermogravimetric analysis (TGA) demonstrated the produced P(3 HB) to have high molecular weight (2.84 × 10(6)) and lowered crystallinity (∼ 30%) compared to commercial polymer. Integrating the production efficiency and the thermal characteristics of the polymer produced by recombinant E. coli, the viability and sustainability of biofuels and biopolymers for economic human need could be enhanced.
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Affiliation(s)
- Mohan Ganesh
- Medical Microbiology Laboratory, Department of Microbiology, Centre for Excellence in Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Arivazhagan Senthamarai
- Medical Microbiology Laboratory, Department of Microbiology, Centre for Excellence in Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Santhanam Shanmughapriya
- Medical Microbiology Laboratory, Department of Microbiology, Centre for Excellence in Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Kalimuthusamy Natarajaseenivasan
- Medical Microbiology Laboratory, Department of Microbiology, Centre for Excellence in Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India.
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85
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Shao XR, Wei XQ, Song X, Hao LY, Cai XX, Zhang ZR, Peng Q, Lin YF. Independent effect of polymeric nanoparticle zeta potential/surface charge, on their cytotoxicity and affinity to cells. Cell Prolif 2015; 48:465-74. [PMID: 26017818 PMCID: PMC6496505 DOI: 10.1111/cpr.12192] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 03/01/2015] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Up to now, little research has been focussed on discovering how zeta potential independently affects polymeric nanoparticle (NP) cytotoxicity. METHODS Polymeric nanoparticles of gradient zeta potential ranging from -30 mv to +40 mv were fabricated using the same poly-3-hydroxybutyrate-co-3-hydroxyhexanoate (PHBHHx) biopolymer. Interaction forces between nanoparticles and cells were measured by atomic force microscopy (AFM). Cytotoxicity of the nanoparticles to cells was investigated by using MTT (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide) assay. RESULTS Four kinds of nanoparticle with similar sizes and gradient zeta potentials, were fabricated. Those with positive surface charges were found to be more toxic than those with negative surface charges. Positively charged nanoparticles or nanoparticles with higher 'like' charges, offered higher interaction force with cells. CONCLUSION This work proposes a novel approach for investigating interaction between NPs and cells, and discloses the importance of controlling zeta potential in developing NPs-based formulations in the future.
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Affiliation(s)
- Xiao-Ru Shao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xue-Qin Wei
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xu Song
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Li-Ying Hao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiao-Xiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Zhi-Rong Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Qiang Peng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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Strong PJ, Xie S, Clarke WP. Methane as a resource: can the methanotrophs add value? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:4001-18. [PMID: 25723373 DOI: 10.1021/es504242n] [Citation(s) in RCA: 230] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Methane is an abundant gas used in energy recovery systems, heating, and transport. Methanotrophs are bacteria capable of using methane as their sole carbon source. Although intensively researched, the myriad of potential biotechnological applications of methanotrophic bacteria has not been comprehensively discussed in a single review. Methanotrophs can generate single-cell protein, biopolymers, components for nanotechnology applications (surface layers), soluble metabolites (methanol, formaldehyde, organic acids, and ectoine), lipids (biodiesel and health supplements), growth media, and vitamin B12 using methane as their carbon source. They may be genetically engineered to produce new compounds such as carotenoids or farnesene. Some enzymes (dehydrogenases, oxidase, and catalase) are valuable products with high conversion efficiencies and can generate methanol or sequester CO2 as formic acid ex vivo. Live cultures can be used for bioremediation, chemical transformation (propene to propylene oxide), wastewater denitrification, as components of biosensors, or possibly for directly generating electricity. This review demonstrates the potential for methanotrophs and their consortia to generate value while using methane as a carbon source. While there are notable challenges using a low solubility gas as a carbon source, the massive methane resource, and the potential cost savings while sequestering a greenhouse gas, keeps interest piqued in these unique bacteria.
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Affiliation(s)
- P J Strong
- Centre for Solid Waste Bioprocessing, School of Civil Engineering, School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - S Xie
- Centre for Solid Waste Bioprocessing, School of Civil Engineering, School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - W P Clarke
- Centre for Solid Waste Bioprocessing, School of Civil Engineering, School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
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Panayotidou E, Baklavaridis A, Zuburtikudis I, Achilias DS. Nanocomposites of poly(3-hydroxybutyrate)/organomodified montmorillonite: Effect of the nanofiller on the polymer's biodegradation. J Appl Polym Sci 2014. [DOI: 10.1002/app.41656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Elpiniki Panayotidou
- Department of Mechanical and Industrial Design Engineering; TEI of Western Macedonia; 50100 Kozani Greece
- Department of Chemistry; Aristotle University of Thessaloniki; 54124 Thessaloniki Greece
| | - Apostolos Baklavaridis
- Department of Mechanical and Industrial Design Engineering; TEI of Western Macedonia; 50100 Kozani Greece
| | - Ioannis Zuburtikudis
- Department of Mechanical and Industrial Design Engineering; TEI of Western Macedonia; 50100 Kozani Greece
- Department of Chemical and Petroleum Engineering; United Arab Emirates University; Al Ain UAE
| | - Dimitris S. Achilias
- Department of Chemistry; Aristotle University of Thessaloniki; 54124 Thessaloniki Greece
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Panayotidou E, Kroustalli A, Baklavaridis A, Zuburtikudis I, Achilias DS, Deligianni D. Biopolyester-based nanocomposites: Structural, thermo-mechanical and biocompatibility characteristics of poly(3-hydroxybutyrate)/montmorillonite clay nanohybrids. J Appl Polym Sci 2014. [DOI: 10.1002/app.41628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Elpiniki Panayotidou
- The Nanomaterials and Manufacturing Processes Laboratory (NanoMaMa Lab); Department of Mechanical and Industrial Design Engineering; TEI of Western Macedonia; 50100 Kozani Greece
- Laboratory of Organic Chemical Technology; Department of Chemistry; Aristotle University of Thessaloniki; 54124 Thessaloniki Greece
| | - Anthoula Kroustalli
- Laboratory of Biomechanics and Biomedical Engineering; Department of Mechanical Engineering and Aeronautics; University of Patras; 26504 Rio Greece
| | - Apostolos Baklavaridis
- The Nanomaterials and Manufacturing Processes Laboratory (NanoMaMa Lab); Department of Mechanical and Industrial Design Engineering; TEI of Western Macedonia; 50100 Kozani Greece
| | - Ioannis Zuburtikudis
- The Nanomaterials and Manufacturing Processes Laboratory (NanoMaMa Lab); Department of Mechanical and Industrial Design Engineering; TEI of Western Macedonia; 50100 Kozani Greece
| | - Dimitris S. Achilias
- Laboratory of Organic Chemical Technology; Department of Chemistry; Aristotle University of Thessaloniki; 54124 Thessaloniki Greece
| | - Despoina Deligianni
- Laboratory of Biomechanics and Biomedical Engineering; Department of Mechanical Engineering and Aeronautics; University of Patras; 26504 Rio Greece
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89
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Zhang W, Chen C, Cao R, Maurmann L, Li P. Inhibitors of polyhydroxyalkanoate (PHA) synthases: synthesis, molecular docking, and implications. Chembiochem 2014; 16:156-166. [PMID: 25394180 DOI: 10.1002/cbic.201402380] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Indexed: 11/06/2022]
Abstract
Polyhydroxyalkanoate (PHA) synthases (PhaCs) catalyze the formation of biodegradable PHAs that are considered to be ideal alternatives to non-biodegradable synthetic plastics. However, study of PhaCs has been challenging because the rate of PHA chain elongation is much faster than that of initiation. This difficulty, along with lack of a crystal structure, has become the main hurdle to understanding and engineering PhaCs for economical PHA production. Here we report the synthesis of two carbadethia CoA analogues--sT-CH2-CoA (26 a) and sTet-CH2-CoA (26 b)--as well as sT-aldehyde (saturated trimer aldehyde, 29), as new PhaC inhibitors. Study of these analogues with PhaECAv revealed that 26 a/b and 29 are competitive and mixed inhibitors, respectively. Both the CoA moiety and extension of PHA chain will increase binding affinity; this is consistent with our docking study. Estimation of the Kic values of 26 a and 26 b predicts that a CoA analogue incorporating an octameric hydroxybutanoate (HB) chain might facilitate the formation of a kinetically well-behaved synthase.
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Affiliation(s)
- Wei Zhang
- Department of Chemistry, Kansas State Univerity, Manhattan, KS 66506 (USA)
| | - Chao Chen
- Department of Chemistry, Kansas State Univerity, Manhattan, KS 66506 (USA)
| | - Ruikai Cao
- Department of Chemistry, Kansas State Univerity, Manhattan, KS 66506 (USA)
| | - Leila Maurmann
- Department of Chemistry, Kansas State Univerity, Manhattan, KS 66506 (USA)
| | - Ping Li
- Department of Chemistry, Kansas State Univerity, Manhattan, KS 66506 (USA)
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90
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Tan D, Wu Q, Chen JC, Chen GQ. Engineering Halomonas TD01 for the low-cost production of polyhydroxyalkanoates. Metab Eng 2014; 26:34-47. [PMID: 25217798 DOI: 10.1016/j.ymben.2014.09.001] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/29/2014] [Accepted: 09/02/2014] [Indexed: 12/14/2022]
Abstract
The halophile Halomonas TD01 and its derivatives have been successfully developed as a low-cost platform for the unsterile and continuous production of chemicals. Therefore, to increase the genetic engineering stability of this platform, the DNA restriction/methylation system of Halomonas TD01 was partially inhibited. In addition, a stable and conjugative plasmid pSEVA341 with a high-copy number was constructed to contain a LacI(q)-Ptrc system for the inducible expression of multiple pathway genes. The Halomonas TD01 platform, was further engineered with its 2-methylcitrate synthase and three PHA depolymerases deleted within the chromosome, resulting in the production of the Halomonas TD08 strain. The overexpression of the threonine synthesis pathway and threonine dehydrogenase made the recombinant Halomonas TD08 able to produce poly(3-hydroxybutyrate-co-3-hydroxyvalerate) or PHBV consisting of 4-6 mol% 3-hydroxyvalerate or 3 HV, from various carbohydrates as the sole carbon source. The overexpression of the cell division inhibitor MinCD during the cell growth stationary phase in Halomonas TD08 elongated its shape to become at least 1.4-fold longer than its original size, resulting in enhanced PHB accumulation from 69 wt% to 82 wt% in the elongated cells, further promoting gravity-induced cell precipitations that simplify the downstream processing of the biomass. The resulted Halomonas strains contributed to further reducing the PHA production cost.
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Affiliation(s)
- Dan Tan
- MOE Key Lab of Bioinformatics, National Engineering Laboratory for Anti-tumor Protein Therapeutics, School of Life Science, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China; Institute of Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Qiong Wu
- MOE Key Lab of Bioinformatics, National Engineering Laboratory for Anti-tumor Protein Therapeutics, School of Life Science, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China
| | - Jin-Chun Chen
- MOE Key Lab of Bioinformatics, National Engineering Laboratory for Anti-tumor Protein Therapeutics, School of Life Science, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China
| | - Guo-Qiang Chen
- MOE Key Lab of Bioinformatics, National Engineering Laboratory for Anti-tumor Protein Therapeutics, School of Life Science, Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China.
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91
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Hazer DB, Bal E, Nurlu G, Benli K, Balci S, Öztürk F, Hazer B. In vivo application of poly-3-hydroxyoctanoate as peripheral nerve graft. J Zhejiang Univ Sci B 2014; 14:993-1003. [PMID: 24190445 DOI: 10.1631/jzus.b1300016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE This study aims to investigate the degree of biocompatibility and neuroregeneration of a polymer tube, poly-3-hydroxyoctanoate (PHO) in nerve gap repair. METHODS Forty Wistar Albino male rats were randomized into two groups: autologous nerve gap repair group and PHO tube repair group. In each group, a 10-mm right sciatic nerve defect was created and reconstructed accordingly. Neuroregeneration was studied by sciatic function index (SFI), electromyography, and immunohistochemical studies on Days 7, 21, 45 and 60 of implantation. Biocompatibility was analyzed by the capsule formation around the conduit. Biodegradation was analyzed by the molecular weight loss in vivo. RESULTS Electrophysiological and histomorphometric assessments demonstrated neuroregeneration in both groups over time. In the experimental group, a straight alignment of the Schwann cells parallel to the axons was detected. However, autologous nerve graft seems to have a superior neuroregeneration compared to PHO grafts. Minor biodegradation was observed in PHO conduit at the end of 60 d. CONCLUSIONS Although neuroregeneration is detected in PHO grafts with minor degradation in 60 d, autologous nerve graft is found to be superior in axonal regeneration compared to PHO nerve tube grafts. PHO conduits were found to create minor inflammatory reaction in vivo, resulting in good soft tissue response.
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Affiliation(s)
- D Burcu Hazer
- Department of Neurosurgery, Faculty of Medicine, Muğla Sıtkı Koçman University, Muğla 48000, Turkey; Atatürk Research and Medical Center, Neurosurgery Clinic, Ministry of Health of the Republic of Turkey, Ankara 06110, Turkey; Department of Neurology, Faculty of Medicine, School of Medicine, Hacettepe University, Ankara 06100, Turkey; Department of Neurosurgery, Faculty of Medicine, School of Medicine, Hacettepe University, Ankara 06100, Turkey; Atatürk Research and Medical Center, Department of Pathology, Yıldırım Beyazıt University, Ankara 06110, Turkey; Department of Histology and Embryology, Faculty of Medicine, Muğla Sıtkı Koçman University, Muğla 48000, Turkey; Department of Chemistry, Bülent Ecevit University, Zonguldak 67100, Turkey
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92
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Cao Q, Zhang J, Liu H, Wu Q, Chen J, Chen GQ. The mechanism of anti-osteoporosis effects of 3-hydroxybutyrate and derivatives under simulated microgravity. Biomaterials 2014; 35:8273-83. [DOI: 10.1016/j.biomaterials.2014.06.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 06/09/2014] [Indexed: 10/25/2022]
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93
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Nishizuka T, Kurahashi T, Hara T, Hirata H, Kasuga T. Novel intramedullary-fixation technique for long bone fragility fractures using bioresorbable materials. PLoS One 2014; 9:e104603. [PMID: 25111138 PMCID: PMC4128718 DOI: 10.1371/journal.pone.0104603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 07/15/2014] [Indexed: 11/24/2022] Open
Abstract
Almost all of the currently available fracture fixation devices for metaphyseal fragility fractures are made of hard metals, which carry a high risk of implant-related complications such as implant cutout in severely osteoporotic patients. We developed a novel fracture fixation technique (intramedullary-fixation with biodegradable materials; IM-BM) for severely weakened long bones using three different non-metallic biomaterials, a poly(l-lactide) (PLLA) woven tube, a nonwoven polyhydroxyalkanoates (PHA) fiber mat, and an injectable calcium phosphate cement (CPC). The purpose of this work was to evaluate the feasibility of IM-BM with mechanical testing as well as with an animal experiment. To perform mechanical testing, we fixed two longitudinal acrylic pipes with four different methods, and used them for a three-point bending test (N = 5). The three-point bending test revealed that the average fracture energy for the IM-BM group (PLLA + CPC + PHA) was 3 times greater than that of PLLA + CPC group, and 60 to 200 times greater than that of CPC + PHA group and CPC group. Using an osteoporotic rabbit distal femur incomplete fracture model, sixteen rabbits were randomly allocated into four experimental groups (IM-BM group, PLLA + CPC group, CPC group, Kirschner wire (K-wire) group). No rabbit in the IM-BM group suffered fracture displacement even under full weight bearing. In contrast, two rabbits in the PLLA + CPC group, three rabbits in the CPC group, and three rabbits in the K-wire group suffered fracture displacement within the first postoperative week. The present work demonstrated that IM-BM was strong enough to reinforce and stabilize incomplete fractures with both mechanical testing and an animal experiment even in the distal thigh, where bone is exposed to the highest bending and torsional stresses in the body. IM-BM can be one treatment option for those with severe osteoporosis.
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Affiliation(s)
- Takanobu Nishizuka
- Department of Hand Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
- * E-mail:
| | - Toshikazu Kurahashi
- Department of Hand Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tatsuya Hara
- Department of Hand Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hitoshi Hirata
- Department of Hand Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toshihiro Kasuga
- Department of Frontier Materials, Nagoya Institute of Technology, Nagoya, Japan
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94
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Effect of carbon nanotube functionalization on the structure and properties of poly(3-hydroxybutyrate)/MWCNTs biocomposites. Macromol Res 2014. [DOI: 10.1007/s13233-014-2141-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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95
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Dedkova EN, Blatter LA. Role of β-hydroxybutyrate, its polymer poly-β-hydroxybutyrate and inorganic polyphosphate in mammalian health and disease. Front Physiol 2014; 5:260. [PMID: 25101001 PMCID: PMC4102118 DOI: 10.3389/fphys.2014.00260] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 06/19/2014] [Indexed: 12/14/2022] Open
Abstract
We provide a comprehensive review of the role of β-hydroxybutyrate (β-OHB), its linear polymer poly-β-hydroxybutyrate (PHB), and inorganic polyphosphate (polyP) in mammalian health and disease. β-OHB is a metabolic intermediate that constitutes 70% of ketone bodies produced during ketosis. Although ketosis has been generally considered as an unfavorable pathological state (e.g., diabetic ketoacidosis in type-1 diabetes mellitus), it has been suggested that induction of mild hyperketonemia may have certain therapeutic benefits. β-OHB is synthesized in the liver from acetyl-CoA by β-OHB dehydrogenase and can be used as alternative energy source. Elevated levels of PHB are associated with pathological states. In humans, short-chain, complexed PHB (cPHB) is found in a wide variety of tissues and in atherosclerotic plaques. Plasma cPHB concentrations correlate strongly with atherogenic lipid profiles, and PHB tissue levels are elevated in type-1 diabetic animals. However, little is known about mechanisms of PHB action especially in the heart. In contrast to β-OHB, PHB is a water-insoluble, amphiphilic polymer that has high intrinsic viscosity and salt-solvating properties. cPHB can form non-specific ion channels in planar lipid bilayers and liposomes. PHB can form complexes with polyP and Ca(2+) which increases membrane permeability. The biological roles played by polyP, a ubiquitous phosphate polymer with ATP-like bonds, have been most extensively studied in prokaryotes, however polyP has recently been linked to a variety of functions in mammalian cells, including blood coagulation, regulation of enzyme activity in cancer cells, cell proliferation, apoptosis and mitochondrial ion transport and energy metabolism. Recent evidence suggests that polyP is a potent activator of the mitochondrial permeability transition pore in cardiomyocytes and may represent a hitherto unrecognized key structural and functional component of the mitochondrial membrane system.
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Affiliation(s)
- Elena N Dedkova
- Department of Molecular Biophysics and Physiology, Rush University Medical Center Chicago, IL, USA
| | - Lothar A Blatter
- Department of Molecular Biophysics and Physiology, Rush University Medical Center Chicago, IL, USA
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96
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Jana S, Tefft BJ, Spoon DB, Simari RD. Scaffolds for tissue engineering of cardiac valves. Acta Biomater 2014; 10:2877-93. [PMID: 24675108 DOI: 10.1016/j.actbio.2014.03.014] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 02/25/2014] [Accepted: 03/12/2014] [Indexed: 01/09/2023]
Abstract
Tissue engineered heart valves offer a promising alternative for the replacement of diseased heart valves avoiding the limitations faced with currently available bioprosthetic and mechanical heart valves. In the paradigm of tissue engineering, a three-dimensional platform - the so-called scaffold - is essential for cell proliferation, growth and differentiation, as well as the ultimate generation of a functional tissue. A foundation for success in heart valve tissue engineering is a recapitulation of the complex design and diverse mechanical properties of a native valve. This article reviews technological details of the scaffolds that have been applied to date in heart valve tissue engineering research.
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Affiliation(s)
- S Jana
- Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - B J Tefft
- Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - D B Spoon
- Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - R D Simari
- Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
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97
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Biazar E. Polyhydroxyalkanoates as Potential Biomaterials for Neural Tissue Regeneration. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2014.886227] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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98
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Weng Y, Zhou Y, Zhang M. The Development and Commercialization of Biobased, Biodegradable Plastics in China. Ind Biotechnol (New Rochelle N Y) 2014. [DOI: 10.1089/ind.2014.1506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Yunxuan Weng
- School of Materials and Mechanical Engineering of Beijing Technology & Business University, China
- China Degradable Plastic Committee of the China Plastics Processing Industry Association (CPPIA), Beijing, China
| | - Yingxin Zhou
- School of Materials and Mechanical Engineering of Beijing Technology & Business University, China
| | - Min Zhang
- School of Materials and Mechanical Engineering of Beijing Technology & Business University, China
- China Degradable Plastic Committee of the China Plastics Processing Industry Association (CPPIA), Beijing, China
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99
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Jeon JM, Brigham CJ, Kim YH, Kim HJ, Yi DH, Kim H, Rha C, Sinskey AJ, Yang YH. Biosynthesis of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx)) from butyrate using engineered Ralstonia eutropha. Appl Microbiol Biotechnol 2014; 98:5461-9. [DOI: 10.1007/s00253-014-5617-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/11/2014] [Accepted: 02/11/2014] [Indexed: 12/23/2022]
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100
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Ashby RD, Solaiman DK. Sophorolipid-induced dimpling and increased porosity in solvent-cast short-chain polyhydroxyalkanoate films: Impact on thermomechanical properties. J Appl Polym Sci 2014. [DOI: 10.1002/app.40609] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Richard D. Ashby
- U. S. Department of Agriculture; Eastern Regional Research Center, Agricultural Research Service; Wyndmoor Pennsylvania 19038
| | - Daniel K.Y. Solaiman
- U. S. Department of Agriculture; Eastern Regional Research Center, Agricultural Research Service; Wyndmoor Pennsylvania 19038
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