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Phan VH, Tai Y, Chiang T, Yu C. Synthesis of poly(lactide‐
co
‐glycolide) containing high glycolide contents by ring‐opening polymerization as well as their structural characterizations, thermal properties, morphologies, and hydrophilicity. J Appl Polym Sci 2022. [DOI: 10.1002/app.53328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Van Hoang‐Khang Phan
- Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan
| | - Yi‐Hsin Tai
- Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan
| | - Tai‐Chin Chiang
- Global Development Engineering Program National Taiwan University of Science and Technology Taipei Taiwan
| | - Chin‐Yang Yu
- Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan
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2
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Abdurahim J, Serra CA, Blanck C, Vauthier M. One-step production of highly monodisperse size-controlled poly(lactic-co-glycolic acid) nanoparticles for the release of a hydrophobic model drug. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Wei YW, Sayed SM, Zhu WW, Xu KF, Wu FG, Xu J, Nie HP, Wang YL, Lu XL, Ma Q. Antibacterial and Fluorescence Staining Properties of an Innovative GTR Membrane Containing 45S5BGs and AIE Molecules In Vitro. NANOMATERIALS 2022; 12:nano12040641. [PMID: 35214970 PMCID: PMC8874606 DOI: 10.3390/nano12040641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/06/2022] [Accepted: 02/07/2022] [Indexed: 12/04/2022]
Abstract
This study aimed to add two functional components-antibacterial 45S5BGs particles and AIE nanoparticles (TPE-NIM+) with bioprobe characteristics-to the guided tissue regeneration (GTR) membrane, to optimize the performance. The PLGA/BG/TPE-NIM+ membrane was synthesized. The static water contact angle, morphologies, and surface element analysis of the membrane were then characterized. In vitro biocompatibility was tested with MC3T3-E1 cells using CCK-8 assay, and antibacterial property was evaluated with Streptococcus mutans and Porphyromonas gingivalis by the LIVE/DEAD bacterial staining and dilution plating procedure. The fluorescence staining of bacteria was observed by Laser Scanning Confocal Microscope. The results showed that the average water contact angle was 46°. In the cytotoxicity test, except for the positive control group, there was no significant difference among the groups (p > 0.05). The antibacterial effect in the PLGA/BG/TPE-NIM+ group was significantly (p < 0.01), while the sterilization rate was 99.99%, better than that in the PLGA/BG group (98.62%) (p < 0.01). Confocal images showed that the membrane efficiently distinguished G+ bacteria from G- bacteria. This study demonstrated that the PLGA/BG/TPE-NIM+ membrane showed good biocompatibility, efficient sterilization performance, and surface mineralization ability and could be used to detect pathogens in a simple, fast, and wash-free protocol.
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Affiliation(s)
- Yu-Wen Wei
- Jiangsu Province Key Laboratory of Oral Diseases, Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China; (Y.-W.W.); (W.-W.Z.); (J.X.); (H.-P.N.); (Y.-L.W.)
| | - Sayed Mir Sayed
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, China; (S.M.S.); (K.-F.X.); (F.-G.W.)
| | - Wei-Wen Zhu
- Jiangsu Province Key Laboratory of Oral Diseases, Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China; (Y.-W.W.); (W.-W.Z.); (J.X.); (H.-P.N.); (Y.-L.W.)
| | - Ke-Fei Xu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, China; (S.M.S.); (K.-F.X.); (F.-G.W.)
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, China; (S.M.S.); (K.-F.X.); (F.-G.W.)
| | - Jing Xu
- Jiangsu Province Key Laboratory of Oral Diseases, Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China; (Y.-W.W.); (W.-W.Z.); (J.X.); (H.-P.N.); (Y.-L.W.)
| | - He-Peng Nie
- Jiangsu Province Key Laboratory of Oral Diseases, Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China; (Y.-W.W.); (W.-W.Z.); (J.X.); (H.-P.N.); (Y.-L.W.)
| | - Yu-Li Wang
- Jiangsu Province Key Laboratory of Oral Diseases, Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China; (Y.-W.W.); (W.-W.Z.); (J.X.); (H.-P.N.); (Y.-L.W.)
| | - Xiao-Lin Lu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, China; (S.M.S.); (K.-F.X.); (F.-G.W.)
- Correspondence: (Q.M.); (X.-L.L.); Tel.: +86-13770963117 (Q.M.)
| | - Qian Ma
- Jiangsu Province Key Laboratory of Oral Diseases, Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China; (Y.-W.W.); (W.-W.Z.); (J.X.); (H.-P.N.); (Y.-L.W.)
- Correspondence: (Q.M.); (X.-L.L.); Tel.: +86-13770963117 (Q.M.)
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4
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Little A, Wemyss AM, Haddleton DM, Tan B, Sun Z, Ji Y, Wan C. Synthesis of Poly(Lactic Acid- co-Glycolic Acid) Copolymers with High Glycolide Ratio by Ring-Opening Polymerisation. Polymers (Basel) 2021; 13:2458. [PMID: 34372058 PMCID: PMC8348705 DOI: 10.3390/polym13152458] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 01/29/2023] Open
Abstract
The rise in demand for biodegradable plastic packaging with high barrier properties has spurred interest in poly(lactic acid-co-glycolic acid) (PLGA) copolymers with a relatively high glycolide content. In this work, we examined how reaction conditions affect the synthesis of PLGA25 (L:G 25:75) through the ring-opening polymerisation of d-l-lactide (L) and glycolide (G), using tin 2-ethylhexanoate (Sn(Oct)2) as the catalyst and 1-dodecanol as the initiator. The effects of varying the initiator concentration, catalyst concentration, reaction time, and temperature on the molecular weight, monomer conversion, and thermal properties of PLGA25 were investigated. Increasing the reaction temperature from 130 to 205 °C significantly reduced the time required for high monomer conversions but caused greater polymer discolouration. Whilst increasing the [M]:[C] from 6500:1 to 50,000:1 reduced polymer discolouration, it also resulted in longer reaction times and higher reaction temperatures being required to achieve high conversions. High Mn and Mw values of 136,000 and 399,000 g mol-1 were achieved when polymerisations were performed in the solid state at 150 °C using low initiator concentrations. These copolymers were analysed using high temperature SEC at 80 °C, employing DMSO instead of HFIP as the eluent.
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Affiliation(s)
- Alastair Little
- International Institute for Nanocomposites Manufacturing (IINM), WMG, University of Warwick, Coventry CV4 7AL, UK; (A.L.); (A.M.W.)
| | - Alan M. Wemyss
- International Institute for Nanocomposites Manufacturing (IINM), WMG, University of Warwick, Coventry CV4 7AL, UK; (A.L.); (A.M.W.)
| | | | - Bowen Tan
- PJIM Polymer Scientific Co., Ltd., Shanghai 201102, China; (B.T.); (Z.S.); (Y.J.)
| | - Zhaoyang Sun
- PJIM Polymer Scientific Co., Ltd., Shanghai 201102, China; (B.T.); (Z.S.); (Y.J.)
| | - Yang Ji
- PJIM Polymer Scientific Co., Ltd., Shanghai 201102, China; (B.T.); (Z.S.); (Y.J.)
| | - Chaoying Wan
- International Institute for Nanocomposites Manufacturing (IINM), WMG, University of Warwick, Coventry CV4 7AL, UK; (A.L.); (A.M.W.)
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5
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Ansari M, Eslami H. Development of a novel poly (lactic-co-glycolic acid) based composite scaffold for bone tissue engineering. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1954661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Mojtaba Ansari
- Department of Biomedical Engineering, Meybod University, Meybod, Iran
| | - Hossein Eslami
- Department of Biomedical Engineering, Meybod University, Meybod, Iran
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6
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Lu J, Tian W, Cui L, Cai B, Zhang T, Huang N, Lu L, Zhu T. Lidocaine-eluting endotracheal tube effectively attenuates intubation related airway response. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:871. [PMID: 34164505 PMCID: PMC8184491 DOI: 10.21037/atm-21-1930] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Background Lidocaine (LDC) is a local anesthetic widely used to relieve intubation-related airway responses. However, low drug concentration and short effective duration of LDC is inadequate to provide a satisfactory anesthetic effect on the surface of the airway. The present study sought to develop a LDC-delivery endotracheal tube (ETT) to achieve high local drug concentration and sustained drug release with the aim of attenuating an intubation-related airway response. Methods ETTs and polyvinyl chloride (PVC) discs were coated with different molecular weight (MW) poly lactic-co-glycolic acid (PLGA: 50/50; MW: 3,000, 6,000, and 10,000) loaded with LDC by airbrush spray. The morphology of LDC-eluting coatings was analyzed using scanning electron microscopy. In vitro drug release was determined by ultraviolet spectrophotometer. An in vivo study was performed to investigate the differences in plasma LDC concentration, intubation tolerance, and tracheal tissue injury in rabbits undergoing intubation of blank, LDC-spray, or LDC-coated ETTs. Results Approximate 5 mg/cm2 coatings (containing 2.5 mg/cm2 LDC) were deposited onto the PVC discs and ETTs. While even distribution and smooth surfaces were generated in PLGA3000 + LDC and PLGA6000 + LDC coatings, PLGA10000 + LDC formed uneven and gullied coatings. Burst release within the first 4 h and sustained release for at least 5 days was achieved in vitro in PLGA + LDC coatings and the in vivo study demonstrated higher plasma LDC concentration and longer drug release duration in LDC-coated ETTs compared with LDC-spray. LDC-coated ETTs significantly improved intubation tolerance in rabbits, as measured by less general anesthetic consumption and longer tube tolerance duration in contrast to blank ETTs with or without LDC spray. Histology assessment showed less mucosal edema area in the PLGA3000 + LDC and PLGA6000 + LDC groups compared to the control, LDC-spray, and PLGA10000 + LDC groups. Among the different MW PLGAs, PLGA6000 presented optimal morphological characteristics, drug release, and anesthetic effect. Conclusions ETTs coated with PLGA + LDC effectively attenuate an intubation-related airway response via increasing local drug concentration and extending drug action duration, which demonstrates a potential therapeutic benefit for patients undergoing intubation.
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Affiliation(s)
- Jing Lu
- Department of Anesthesiology, Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital of Sichuan University, Chengdu, China.,Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.,Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Wenjie Tian
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China.,Department of Cardiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Linxian Cui
- Department of Cardiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Bing Cai
- Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Tingting Zhang
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Nan Huang
- Key Lab of Advanced Technology for Materials of Education Ministry, School of Materials, Southwest Jiaotong University, Chengdu, China
| | - Lei Lu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Tao Zhu
- Department of Anesthesiology, Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital of Sichuan University, Chengdu, China
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Tuning morphology of Pickering emulsions stabilised by biodegradable PLGA nanoparticles: How PLGA characteristics influence emulsion properties. J Colloid Interface Sci 2021; 595:202-211. [PMID: 33823323 DOI: 10.1016/j.jcis.2021.03.061] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 03/05/2021] [Accepted: 03/11/2021] [Indexed: 11/20/2022]
Abstract
In this study, we proved that the stabilisation of Pickering emulsions by polymer nanoparticles (NPs) heavily depends on polymer characteristics. We prepared NPs with four poly(lactide-co-glycolide) polymers (PLGA), of different molar masses (14,000 and 32,000 g/mol) and end groups (acid or alkylester). NPs were either bare (without stabilising polymer) or covered by polyvinyl alcohol (PVA). Pickering emulsions were prepared by mixing NP aqueous suspensions with various amounts of oil (Miglyol 812 N). First, NP wettability was directly affected by PLGA end group: ester-ending PLGA led to more hydrophobic NPs, compared to acid-ending PLGA. This effect of the end group could be slightly enhanced with smaller molar mass. Thus, bare PLGA NPs stabilised different types of emulsions (W/O/W and W/O), following Finkle's rule. However, the effect of PLGA characteristics was masked when NPs were covered by PVA, as PVA drove the stabilisation of O/W emulsions. Secondly, PLGA molar mass and end group also influenced its glass transition temperature (Tg), with spectacular consequences on emulsion formation. Indeed, the shortest ester-ending PLGA exhibited a Tg close to room temperature, when measured in the emulsion. This Tg, easily exceeded during emulsification process, led to a soft solid emulsion, stabilised by a network of NP debris.
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8
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Zhi K, Raji B, Nookala AR, Khan MM, Nguyen XH, Sakshi S, Pourmotabbed T, Yallapu MM, Kochat H, Tadrous E, Pernell S, Kumar S. PLGA Nanoparticle-Based Formulations to Cross the Blood-Brain Barrier for Drug Delivery: From R&D to cGMP. Pharmaceutics 2021; 13:pharmaceutics13040500. [PMID: 33917577 PMCID: PMC8067506 DOI: 10.3390/pharmaceutics13040500] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/03/2021] [Accepted: 04/05/2021] [Indexed: 12/24/2022] Open
Abstract
The blood–brain barrier (BBB) is a natural obstacle for drug delivery into the human brain, hindering treatment of central nervous system (CNS) disorders such as acute ischemic stroke, brain tumors, and human immunodeficiency virus (HIV)-1-associated neurocognitive disorders. Poly(lactic-co-glycolic acid) (PLGA) is a biocompatible polymer that is used in Food and Drug Administration (FDA)-approved pharmaceutical products and medical devices. PLGA nanoparticles (NPs) have been reported to improve drug penetration across the BBB both in vitro and in vivo. Poly(ethylene glycol) (PEG), poly(vinyl alcohol) (PVA), and poloxamer (Pluronic) are widely used as excipients to further improve the stability and effectiveness of PLGA formulations. Peptides and other linkers can be attached on the surface of PLGA to provide targeting delivery. With the newly published guidance from the FDA and the progress of current Good Manufacturing Practice (cGMP) technologies, manufacturing PLGA NP-based drug products can be achieved with higher efficiency, larger quantity, and better quality. The translation from bench to bed is feasible with proper research, concurrent development, quality control, and regulatory assurance.
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Affiliation(s)
- Kaining Zhi
- Plough Center for Sterile Drug Delivery Solutions, University of Tennessee Health Science Center, 208 South Dudley Street, Memphis, TN 38163, USA; (B.R.); (H.K.)
- Correspondence: (K.Z.); (S.K.)
| | - Babatunde Raji
- Plough Center for Sterile Drug Delivery Solutions, University of Tennessee Health Science Center, 208 South Dudley Street, Memphis, TN 38163, USA; (B.R.); (H.K.)
| | | | - Mohammad Moshahid Khan
- Department of Neurology, College of Medicine, University of Tennessee Health Science Center, 855 Monroe Avenue, Memphis, TN 38163, USA;
| | - Xuyen H. Nguyen
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 881 Madison Ave, Memphis, TN 38163, USA; (X.H.N.); (S.S.); (E.T.); (S.P.)
| | - Swarna Sakshi
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 881 Madison Ave, Memphis, TN 38163, USA; (X.H.N.); (S.S.); (E.T.); (S.P.)
| | - Tayebeh Pourmotabbed
- Department of Microbiology, Immunology and Biochemistry, College of Medicine, University of Tennessee Health Science Center, 858 Madison Avenue, Memphis, TN 38163, USA;
| | - Murali M. Yallapu
- Department of Immunology and Microbiology, University of Texas Rio Grande Valley, McAllen, TX 78504, USA;
| | - Harry Kochat
- Plough Center for Sterile Drug Delivery Solutions, University of Tennessee Health Science Center, 208 South Dudley Street, Memphis, TN 38163, USA; (B.R.); (H.K.)
| | - Erene Tadrous
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 881 Madison Ave, Memphis, TN 38163, USA; (X.H.N.); (S.S.); (E.T.); (S.P.)
| | - Shelby Pernell
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 881 Madison Ave, Memphis, TN 38163, USA; (X.H.N.); (S.S.); (E.T.); (S.P.)
| | - Santosh Kumar
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 881 Madison Ave, Memphis, TN 38163, USA; (X.H.N.); (S.S.); (E.T.); (S.P.)
- Correspondence: (K.Z.); (S.K.)
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Salhi S, Mahfoudh J, Abid S, Atanase L, Popa M, Delaite C. Random poly(ε‐caprolactone‐L‐alanine) by direct melt copolymerization. POLYM INT 2020. [DOI: 10.1002/pi.6085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Slim Salhi
- Laboratoire de Chimie Appliquée University of Sfax, Faculté des Sciences de Sfax Sfax Tunisia
| | - Jihen Mahfoudh
- Laboratoire de Chimie Appliquée University of Sfax, Faculté des Sciences de Sfax Sfax Tunisia
| | - Souhir Abid
- Laboratoire de Chimie Appliquée University of Sfax, Faculté des Sciences de Sfax Sfax Tunisia
| | | | - Marcel Popa
- Faculty of Chemical Engineering and Protection of the Environment, Department of Natural and Synthetic Polymers Gheorghe Asachi’ Technical University Iaşi Romania
- Academy of Romanian Scientists Bucharest Romania
| | - Christelle Delaite
- Laboratoire de Photochimie et d'Ingénierie Macromoléculaires University of Haute Alsace Mulhouse France
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Murcia Valderrama M, van Putten RJ, Gruter GJM. PLGA Barrier Materials from CO 2. The influence of Lactide Co-monomer on Glycolic Acid Polyesters. ACS APPLIED POLYMER MATERIALS 2020; 2:2706-2718. [PMID: 32954354 PMCID: PMC7493221 DOI: 10.1021/acsapm.0c00315] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/09/2020] [Indexed: 05/03/2023]
Abstract
The combination of the predicted polymer market growth and the emergence of renewable feedstocks creates a fantastic opportunity for sustainable polymers. To replace fossil-based feedstock, there are only three alternative sustainable carbon sources: biomass, CO2, and existing plastics (via mechanical and/or chemical recycling). The ultimate circular feedstock would be CO2: it can be electrochemically reduced to formic acid derivatives that subsequently can be converted into useful monomers such as glycolic acid. This work is part of the European Horizon 2020 project "Ocean" in which the steps from CO2 to glycolic acid are developed. Polyglycolic acid (PGA) and poly(lactide-co-glycolide) (PLGA) copolyesters with high lactic acid (LA) content are well-known. PGA is very difficult to handle due to its high crystallinity. On the other hand, PLGAs with high LA content lack good oxygen and moisture barriers. The aim of this work is to understand the structure-property relationships for the mostly unexplored glycolic acid rich PLGA copolymer series and to assess their suitability as barrier materials. Thus, PLGA copolymers with between 50 and 91 mol % glycolic acid were synthesized and their properties were evaluated. Increased thermal stability was observed with increasing glycolic acid content. Only those containing 87 and 91 mol % glycolic acid were semicrystalline. A crystallization study under non-isothermal conditions revealed that copolymerization reduces the crystallization rate for PLGA compared to polylactic acid (PLA) and PGA. While PGA homopolymer crystallizes completely when cooled at 10 °C·min-1, the copolymers with 9 and 13% lactic acid show almost 10 times slower crystallization, which is a huge advantage vis-à-vis PGA for processing. The kinetics of this process, modeled with the Jeziorny-modified Avrami method, confirmed those observations. Barrier property assessment revealed great potential for these copolymers for application in barrier films. Increasing glycolic acid content in PLGA copolymers enhances the barrier to both oxygen and water vapor. At room temperature and a relative humidity below 70% the PLGA copolymers with high glycolic acid content outperform the barrier properties of polyethylene terephthalate.
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Affiliation(s)
- Maria
A. Murcia Valderrama
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, P. O. Box 94720, 1090 GS Amsterdam, The Netherlands
| | - Robert-Jan van Putten
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, P. O. Box 94720, 1090 GS Amsterdam, The Netherlands
- Avantium
Chemicals BV, Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands
| | - Gert-Jan M. Gruter
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, P. O. Box 94720, 1090 GS Amsterdam, The Netherlands
- Avantium
Chemicals BV, Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands
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P’yanova LG, Likholobov VA, Sedanova AV, Drozdetskaya MS. Fundamental Technological Approaches to the Synthesis of Carbon Sorbents for Medical and Veterinary Applications. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220030305] [Citation(s) in RCA: 3] [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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12
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Murcia Valderrama MA, van Putten RJ, Gruter GJM. The potential of oxalic – and glycolic acid based polyesters (review). Towards CO2 as a feedstock (Carbon Capture and Utilization – CCU). Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.07.036] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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13
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Gu SY, Chang K, Jin SP. A dual-induced self-expandable stent based on biodegradable shape memory polyurethane nanocomposites (PCLAU/Fe3
O4
) triggered around body temperature. J Appl Polym Sci 2017. [DOI: 10.1002/app.45686] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shu-Ying Gu
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education, Tongji University; Shanghai 201804 People's Republic of China
| | - Kun Chang
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
| | - Sheng-Peng Jin
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
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14
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Jahandideh A, Muthukumarappan K. Star-shaped lactic acid based systems and their thermosetting resins; synthesis, characterization, potential opportunities and drawbacks. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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15
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Zhang Z, Wang X, Zhu R, Wang Y, Li B, Ma Y, Yin Y. Synthesis and characterization of serial random and block-copolymers based on lactide and glycolide. POLYMER SCIENCE SERIES B 2016. [DOI: 10.1134/s1560090416060191] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Ali Mohamed A, Salhi S, Abid S, El Gharbi R, Fradet A. Quasi-alternating polyesteramides from ε-caprolactone and α-amino acids. J Appl Polym Sci 2016. [DOI: 10.1002/app.44220] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Abdoulkader Ali Mohamed
- Université De Sfax, Faculté Des Sciences, Laboratoire De Chimie Appliquée H.C.G.P; 3038 Sfax Tunisie
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien De Chimie Moléculaire (IPCM), Chimie Des Polymères; 4 Place Jussieu. F-75005 Paris France
| | - Slim Salhi
- Université De Sfax, Faculté Des Sciences, Laboratoire De Chimie Appliquée H.C.G.P; 3038 Sfax Tunisie
| | - Souhir Abid
- Université De Sfax, Faculté Des Sciences, Laboratoire De Chimie Appliquée H.C.G.P; 3038 Sfax Tunisie
| | - Rachid El Gharbi
- Université De Sfax, Faculté Des Sciences, Laboratoire De Chimie Appliquée H.C.G.P; 3038 Sfax Tunisie
| | - Alain Fradet
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien De Chimie Moléculaire (IPCM), Chimie Des Polymères; 4 Place Jussieu. F-75005 Paris France
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Xu Y, Kim CS, Saylor DM, Koo D. Polymer degradation and drug delivery in PLGA-based drug-polymer applications: A review of experiments and theories. J Biomed Mater Res B Appl Biomater 2016; 105:1692-1716. [PMID: 27098357 DOI: 10.1002/jbm.b.33648] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/25/2016] [Accepted: 02/12/2016] [Indexed: 01/03/2023]
Abstract
Poly (lactic-co-glycolic acid) (PLGA) copolymers have been broadly used in controlled drug release applications. Because these polymers are biodegradable, they provide an attractive option for drug delivery vehicles. There are a variety of material, processing, and physiological factors that impact the degradation rates of PLGA polymers and concurrent drug release kinetics. This work is intended to provide a comprehensive and collective review of the physicochemical and physiological factors that dictate the degradation behavior of PLGA polymers and drug release from contemporary PLGA-based drug-polymer products. In conjunction with the existing experimental results, analytical and numerical theories developed to predict drug release from PLGA-based polymers are summarized and correlated with the experimental observations. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1692-1716, 2017.
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Affiliation(s)
- Yihan Xu
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - Chang-Soo Kim
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - David M Saylor
- Division of Biology, Chemistry, and Materials Science, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993
| | - Donghun Koo
- Materials Science R&D, MilliporeSigma, Milwaukee, Wisconsin, 53209
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18
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Schöne AC, Richau K, Kratz K, Schulz B, Lendlein A. Influence of Diurethane Linkers on the Langmuir Layer Behavior of Oligo[(rac-lactide)-co
-glycolide]-based Polyesterurethanes. Macromol Rapid Commun 2015; 36:1910-1915. [DOI: 10.1002/marc.201500316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/03/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Anne-Christin Schöne
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
| | - Klaus Richau
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Karl Kratz
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Burkhard Schulz
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
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19
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Carnaroglio D, Tabasso S, Kwasek B, Bogdal D, Gaudino EC, Cravotto G. From lignocellulosic biomass to lactic- and glycolic-acid oligomers: a gram-scale microwave-assisted protocol. CHEMSUSCHEM 2015; 8:1342-1349. [PMID: 25644623 DOI: 10.1002/cssc.201403183] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 11/24/2014] [Indexed: 06/04/2023]
Abstract
The conversion of lignocellulosic biomass into platform chemicals is the key step in the valorization of agricultural waste. Of the biomass-derived platform chemicals currently produced, lactic acid plays a particularly pivotal role in modern biorefineries as it is a versatile commodity chemical and building block for the synthesis of biodegradable polymers. Microwave-assisted processes that furnish lactic acid avoid harsh depolymerization conditions while cutting down reaction time and energy consumption. We herein report a flash catalytic conversion (2 min) of lignocellulosic biomass into lactic and glycolic acids under microwave irradiation. The batch procedure was successfully adapted to a microwave-assisted flow process (35 mL min(-1) ), with the aim of designing a scalable process with higher productivity. The C2 and C4 units recovered from the depolymerization were directly used as the starting material for a solvent and catalyst-free microwave-assisted polycondensation that afforded oligomers in good yields.
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Affiliation(s)
- Diego Carnaroglio
- Dipartimento di Scienza e Tecnologia del Farmaco and Centre for Nanostructured interfaces and surfaces (NIS), University of Turin, Via P. Giuria 9, 10125 Turin (Italy)
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20
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Liu J, Liu XL, Xi TF, Chu CC. A novel pseudo-protein-based biodegradable coating for magnesium substrates: in vitro corrosion phenomena and cytocompatibility. J Mater Chem B 2015; 3:878-893. [DOI: 10.1039/c4tb01527d] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The goal of this study is to examine whether a member of the newly developed biodegradable pseudo-protein biomaterial family could provide a far better protection and performance than the popular hydrolytically degradable poly(glycolide-co-lactide) (PLGA) biomaterial on an experimental magnesium substrate as a model.
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Affiliation(s)
- J. Liu
- Center for Biomedical Materials and Tissue Engineering
- Academy for Advanced Interdisciplinary Studies
- Peking University
- Beijing 100871
- China
| | - X. L. Liu
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - T. F. Xi
- Center for Biomedical Materials and Tissue Engineering
- Academy for Advanced Interdisciplinary Studies
- Peking University
- Beijing 100871
- China
| | - C. C. Chu
- Biomedical Engineering Program
- Cornell University
- Ithaca
- USA
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21
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Preparation, Characterization, and In Vitro Biological Evaluation of PLGA/Nano-Fluorohydroxyapatite (FHA) Microsphere-Sintered Scaffolds for Biomedical Applications. Appl Biochem Biotechnol 2014; 172:2465-79. [DOI: 10.1007/s12010-013-0696-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Accepted: 12/25/2013] [Indexed: 12/21/2022]
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22
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Towards a Smart Encapsulation System for Small-Sized Electronic Devices: A New Approach. INT J POLYM SCI 2014. [DOI: 10.1155/2014/713603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Miniaturized analytical chip devices like biosensors nowadays provide assistance in highly diverse fields of application such as point-of-care diagnostics and industrial bioprocess engineering. However, upon contact with fluids, the sensor requires a protective shell for its electrical components that simultaneously offers controlled access for the target analytes to the measuring units. We therefore developed a capsule that comprises a permeable and a sealed compartment consisting of variable polymers such as biocompatible and biodegradable polylactic acid (PLA) for medical applications or more economical polyvinyl chloride (PVC) and polystyrene (PS) polymers for bioengineering applications. Production of the sealed capsule compartments was performed by heat pressing of polymer pellets placed in individually designable molds. Controlled permeability of the opposite compartments was achieved by inclusion of NaCl inside the polymer matrix during heat pressing, followed by its subsequent release in aqueous solution. Correlating diffusion rates through the so made permeable capsule compartments were quantified for preselected model analytes: glucose, peroxidase, and polystyrene beads of three different diameters (1.4 μm, 4.2 μm, and 20.0 μm). In summary, the presented capsule system turned out to provide sufficient shelter for small-sized electronic devices and gives insight into its potential permeability for defined substances of analytical interest.
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Huang CL, Kumar S, Tan JJ, Boey FY, Venkatraman SS, Steele TW, Loo JS. Modulating drug release from poly(lactic-co-glycolic acid) thin films through terminal end-groups and molecular weight. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2012.11.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Renno ACM, Nejadnik MR, van de Watering FCJ, Crovace MC, Zanotto ED, Hoefnagels JPM, Wolke JGC, Jansen JA, van den Beucken JJJP. Incorporation of bioactive glass in calcium phosphate cement: Material characterization andin vitrodegradation. J Biomed Mater Res A 2013; 101:2365-73. [DOI: 10.1002/jbm.a.34531] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 11/05/2012] [Accepted: 11/05/2012] [Indexed: 01/12/2023]
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25
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Biopolymer Encapsulation of CdTe Quantum Dot for In Vitro Controlled Drug Delivery Release of 6-Mercaptopurine. ACTA ACUST UNITED AC 2012. [DOI: 10.4028/www.scientific.net/amr.584.258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alginate biopolymer stabilized CdTe quantum dot (QD) was prepared and it was encapsulated with folic acid conjugated chitosan for controlled drug delivery of anticancer drug 6-mercaptopurine (6-MP). In addition to alginate, chitosan enhances the stability of QD. Also, in addition to chitosan, alginate binds to the drug leading to enhance the loading efficiency of the resulting drug carrier. The drug release profile of the carrier was investigated by in-vitro. The present study has shown that this drug carrier is feasible for drug delivery and will be important beneficiary for cancer therapy.
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26
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Experimental composite guidance conduits for peripheral nerve repair: An evaluation of ion release. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1654-63. [DOI: 10.1016/j.msec.2012.04.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 02/10/2012] [Accepted: 04/22/2012] [Indexed: 11/22/2022]
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27
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Ragaert K, De Baere I, Moerman M, Cardon L, Degrieck J. Design and thermoregulation of a new microextrusion dispense head for 3D-plotting of thermally sensitive thermoplastics. POLYM ENG SCI 2012. [DOI: 10.1002/pen.23254] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Vega E, Egea MA, Calpena AC, Espina M, García ML. Role of hydroxypropyl-β-cyclodextrin on freeze-dried and gamma-irradiated PLGA and PLGA-PEG diblock copolymer nanospheres for ophthalmic flurbiprofen delivery. Int J Nanomedicine 2012; 7:1357-71. [PMID: 22457594 PMCID: PMC3310410 DOI: 10.2147/ijn.s28481] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Poly(D,L-lactide-co-glycolide) and poly(D,L-lactide-co-glycolide) with poly(ethylene glycol) nanospheres (NSs) incorporating flurbiprofen (FB) were freeze-dried with several cryoprotective agents and sterilized by γ-irradiation. Only when 5.0% (w/v) hydroxypropyl-β-cyclodextrin (HPβCD) was used, a complete resuspension by manual shaking and almost identical particle size of the NSs was obtained after freeze-drying. In vitro drug release and ex vivo corneal permeation of NSs with and without HPβCD were evaluated. The presence of HPβCD resulted in a reduction of burst effect, providing a more sustained release of the drug. A significant decrease in the FB transcorneal permeation of NSs containing HPβCD was obtained, related to the slower diffusion of FB observed in the in vitro results. The uptake mechanism of the NSs was examined by confocal microscopy, suggesting that NSs penetrate corneal epithelium through a transcellular pathway. Ocular tolerance was assessed in vitro and in vivo by the Eytex™ and Draize test, respectively. Long-term stability studies revealed that γ-irradiated NSs stored as freeze-dried powders maintained their initial characteristics. Stability studies of the resuspended NSs after 3 months of storage in the aqueous form showed that NSs were stable at 4°C, while formulations stored at 25°C and 40°C increased their initial particle size.
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Affiliation(s)
- Estefanía Vega
- Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology, Faculty of Pharmacy, University of Barcelona, Av Joan XXIII s/n, Barcelona, Spain.
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29
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Aslan M, Dogan S. Proteomic detection of nitroproteins as potential biomarkers for cardiovascular disease. J Proteomics 2011; 74:2274-88. [PMID: 21640858 DOI: 10.1016/j.jprot.2011.05.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 04/18/2011] [Accepted: 05/03/2011] [Indexed: 12/21/2022]
Abstract
Increased levels of reactive oxygen and nitrogen species are linked to many human diseases and can be formed as an indirect result of the disease process. The accumulation of specific nitroproteins which correlate with pathological processes suggests that nitration of protein tyrosine represents a dynamic and selective process, rather than a random event. Indeed, in numerous clinical disorders associated with an upregulation in oxidative stress, tyrosine nitration has been limited to certain cell types and to selective sites of injury. Additionally, proteomic studies show that only certain proteins are nitrated in selective tissue extracts. A growing list of nitrated proteins link the negative effects of protein nitration with their accumulation in a wide variety of diseases related to oxidation. Nitration of tyrosine has been demonstrated in diverse proteins such as cytochrome c, actin, histone, superoxide dismutase, α-synuclein, albumin, and angiotensin II. In vitro and in vivo aspects of redox-proteomics of specific nitroproteins that could be relevant to biomarker analysis and understanding of cardiovascular disease mechanism will be discussed within this review.
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Affiliation(s)
- Mutay Aslan
- Akdeniz University Faculty of Medicine, Department of Medical Biochemistry, Campus, 07070 Antalya, Turkey.
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30
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Ragaert K, Dekeyser A, Cardon L, Degrieck J. Quantification of thermal material degradation during the processing of biomedical thermoplastics. J Appl Polym Sci 2011. [DOI: 10.1002/app.33323] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Pang X, Wu J, Reinhart-King C, Chu CC. Synthesis and characterization of functionalized water soluble cationic poly(ester amide)s. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24160] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Xie S, Wang S, Zhu L, Wang F, Zhou W. The effect of glycolic acid monomer ratio on the emulsifying activity of PLGA in preparation of protein-loaded SLN. Colloids Surf B Biointerfaces 2009; 74:358-61. [DOI: 10.1016/j.colsurfb.2009.08.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 05/18/2009] [Accepted: 08/05/2009] [Indexed: 11/17/2022]
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33
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Staymates M, Fletcher R, Staymates J, Gillen G, Berkland C. Production and characterization of polymer microspheres containing trace explosives using precision particle fabrication technology. J Microencapsul 2009; 27:426-35. [DOI: 10.3109/02652040903367335] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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34
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Wu XS. Synthesis, Characterization, Biodegradation, and Drug Delivery Application of Biodegradable Lactic/Glycolic Acid Polymers: Part III. Drug Delivery Application. ACTA ACUST UNITED AC 2009; 32:575-91. [PMID: 15974184 DOI: 10.1081/bio-200039635] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Lactic/glycolic acid polymers (PLGA) are widely used for drug delivery systems. The microsphere formulation is the most interesting dosage form of the PLGA-based controlled release devices. In this study, the previously reported PLGA were used to prepare drug-containing microspheres. Progesterone was used as a model drug. The progesterone microspheres were prepared from PLGA having varied compositions and varied molecular weight. The microscopic characterization shows that the microspheres are spherical, nonaggregated particles. The progesterone-containing PLGA microspheres possess a Gaussian size distribution, having average size from 70-134 microm. A solvent extraction method was employed to prepare the microspheres. The microencapsulation method used in this study has high drug encapsulation efficiency. The progesterone release from the PLGA microspheres and the factors affecting the drug release were studied. The release of progesterone from the PLGA microspheres is affected by the properties of the polymer used. The drug release is more rapid from the microspheres prepared using the PLGA having higher fraction of glycolic acid moiety. The drug release from the microspheres composed of higher molecular weight PLGA is faster. The drug content in microspheres also has an effect on the drug release. Higher progesterone content in microspheres yields a quicker initial burst release of the drug.
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Affiliation(s)
- Xue Shen Wu
- College of Pharmacy and Biotechnology, Tianjin University, Tianjin, PR China.
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35
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Dai W, Zhu J, Shangguan A, Lang M. Synthesis, characterization and degradability of the comb-type poly(4-hydroxyl-ε-caprolactone-co-ε-caprolactone)-g-poly(l-lactide). Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2009.03.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Release of rifampicin from chitosan, PLGA and chitosan-coated PLGA microparticles. Colloids Surf B Biointerfaces 2008; 67:166-70. [DOI: 10.1016/j.colsurfb.2008.08.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2008] [Revised: 08/01/2008] [Accepted: 08/05/2008] [Indexed: 11/24/2022]
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Abstract
Cancer is an ever-increasing menace that needs to be curbed soon. Though chemotherapy is successful to some extent, the main drawbacks of chemotherapy is the limited accessibility of drugs to the tumor tissues requiring high doses, their intolerable toxicity, development of multiple drug resistance and their non-specific targeting. Nanoparticles (NPs), an evolution of nanotechnology, have the potential to successfully address these problems related to drug delivery and retention and are considered potential candidates to carry drugs to the desired site of therapeutic action. In this review, we give an overview of the use of clinically applicable NPs mainly for cancer therapy. We also focus on the different types of nanoscale polymer carriers used for the delivery of chemotherapeutic agents and the mechanisms that facilitate their targeted delivery to tumor cells.
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Affiliation(s)
- Suphiya Parveen
- Laboratory of Nanomedicine, Institute of Life Sciences, Bhubaneswar, India
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38
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PLGA/PEG-derivative polymeric matrix for drug delivery system applications: Characterization and cell viability studies. Int J Pharm 2007; 352:50-7. [PMID: 18036755 DOI: 10.1016/j.ijpharm.2007.10.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2007] [Revised: 10/08/2007] [Accepted: 10/10/2007] [Indexed: 11/20/2022]
Abstract
The incorporation of additives such as polyoxyethylated oleic acid glycerides (PEG-derivative) can modify the release of drugs from microparticles. PEG-derivative decreases the release rate of drugs that are dissolved in PLGA matrices but if un-dissolved the initial release rate slightly increases. To clarify this behaviour the influence of adding PEG-derivative in the preparation of microspheres was investigated by scanning electron microscopy, differential scanning calorimetry, gel permeation chromatography, nuclear magnetic resonance and infrared spectroscopy. Cytotoxicity of this resulting PLGA/PEG-derivative matrix was evaluated in cell lines (fibroblasts) which are more reproducible but less specific and in primary cell cultures (splenocytes and human leucocytes) which have the advantage of their specificity. Scanning electron microscopy revealed that PLGA/PEG-derivative microspheres exhibited small surface concavities with a highly porous polymeric matrix. The incorporation of PEG-derivative caused a slight reduction in the T(g) values of PLGA. In vitro degradation studies showed that PEG-derivative remains within the microspheres as long as the matrix does. This PLGA/PEG-derivative matrix was well tolerated exhibiting cell viabilities similar to PLGA microspheres and can be used to modulate the release of drugs from microparticulate systems destined for parenteral administration.
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39
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Duan Y, Zhang Y, Gong T, Zhang Z. Synthesis and characterization of MeO-PEG-PLGA-PEG-OMe copolymers as drug carriers and their degradation behavior in vitro. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2007; 18:2067-73. [PMID: 17558481 DOI: 10.1007/s10856-007-3090-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Accepted: 06/06/2006] [Indexed: 05/15/2023]
Abstract
The objective of this study was to characterize the methylpoly (ethylene glycol)-poly (lacticacid-co-glycolicacid)-poly (ethylene-glycol) (MeO-PEG-PLGA-PEG-OMe, abbreviation as PELGE) copolymers as intravenous injection drug delivery carriers and their degradation behavior in vitro. A series of MeO-PEG-PLGA-PEG-OMe copolymers with various molar ratios of lactic to glycolic acid and various molecular weights and different MeO-PEG contents were synthesized by ring-opening polymerization in the presence of MeO-PEG with molar masses of 2000 and 5000, using stannous octoate as the catalyst. The hydrophilicity of PELGE copolymers, evaluated by contact angle measurements, was found to increase with an increase in their MeO-PEG contents. Methylpoly (ethylene glycol)-poly (lacticacid-co-glycolicacid) (MeO-PEG-PLGA, abbreviation as PELGA) nanoparticles and PELGE nanoparticles were prepared using the emulsion-solvent evaporation technique (o/w) with Pluronic F68 (Poloxamer 188 NF) as emulsifier in the external aqueous phase. The degradation behavior of the nanoparticles was evaluated by the lactate generation with time upon their in vitro incubation in PBS (pH 7.4). The rate of in vitro degradation of the PELGE or PELGA nanoparticles depended on their composition, increasing with an increase in the proportion of MeO-PEG or LA in the copolymer chains. The degradation rate was slower at higher lactide: glycolide ratio. The lower the molecular weight of PELGE; the higher the degradation rate of the nanoparticles.
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Affiliation(s)
- Yourong Duan
- Shanghai Cancer Institute, Shanghai JiaoTong University, Shanghai 200032, China.
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40
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Guo K, Chu CC. Biodegradation of unsaturated poly(ester-amide)s and their hydrogels. Biomaterials 2007; 28:3284-94. [PMID: 17466369 DOI: 10.1016/j.biomaterials.2007.03.031] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Accepted: 03/27/2007] [Indexed: 10/23/2022]
Abstract
The biodegradability of both unsaturated (UPEA) and saturated (SPEA) poly(ester-amide)s and a series of hydrogels (UPEA-G) fabricated from UPEA and poly(ethylene glycol) diacrylate (PEG-DA) was examined as a function of PEA chemical structures in both phosphate buffered saline (PBS) and alpha-chymotrypsin solutions. Based on the weight loss data, alpha-chymotrypsin had a much more profound effect on the hydrolyses of UPEA, SPEA polymers (up to 32% weight loss on day 1 for FPBe) and UPEA-G hydrogels (up to 32% weight loss on day 31 for FPBe-G28) than a PBS buffer (less than 10% for polymers and 16% for hydrogels). The changes in elastic moduli and the interior morphology of the hydrogels in both PBS buffer and alpha-chymotrypsin solutions were also monitored for 2 months, and the hydrogels' crosslinking density (n(e)) and molecular weight between crosslinks (M(c)) before and after biodegradation were then examined as a function of biodegradation time, enzyme concentration, and different chemical structure of precursors. The differences in biodegradation rates among PEA polymer and UPEA-G hydrogels are ascribed to differences in hydrophilicity and saturated or unsaturated structure of the polymers and hydrogel precursors. Our results showed that, by changing the concentration of alpha-chymotrypsin, the type of UPEA precursors and their feed ratio, the UPEA-G hydrogels could have controllable biodegradability, which is quite desirable for a wide range of biomedical and pharmaceutical applications.
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Affiliation(s)
- Kai Guo
- Fiber and Polymer Science Program, Department of Fiber Science and Apparel Design, and Biomedical Engineering Program, Cornell University, Ithaca, NY 14853-4401, USA
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41
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Zweers MLT, Engbers GHM, Grijpma DW, Feijen J. In vitro degradation of nanoparticles prepared from polymers based on DL-lactide, glycolide and poly(ethylene oxide). J Control Release 2005; 100:347-56. [PMID: 15567501 DOI: 10.1016/j.jconrel.2004.09.008] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2004] [Accepted: 09/16/2004] [Indexed: 11/24/2022]
Abstract
Nanoparticles of poly(DL-lactic acid) (PDLLA), poly(DL-lactic-co-glycolic acid) (PLGA) and poly(ethylene oxide)-PLGA diblock copolymer (PEO-PLGA) were prepared by the salting-out method. The in vitro degradation of PDLLA, PLGA and PEO-PLGA nanoparticles in PBS (pH 7.4) at 37 degrees C was studied. The particle size, molecular weight of the polymers and the amount of lactic and glycolic acids formed were followed in time. PDLLA nanoparticles gradually degraded over a period of 2 years and retain their size during that period. A faster degradation was observed for PLGA nanoparticles, which was nearly complete after 10 weeks. PLGA nanoparticles retained their size during that period. In PEO-PLGA nanoparticles, the ester bond connecting the PEO and the PLGA segments was preferentially cleaved, which led to a relatively fast decrease in molecular weight and to (partial) aggregation, as multimodal size distributions were observed. PEO-PLGA nanoparticles were almost completely degraded within 8 weeks.
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Affiliation(s)
- Miechel L T Zweers
- Department of Polymer Chemistry and Biomaterials, Institute for Biomedical Technology, Faculty of Science and Technology, Twente University, P.O. Box 217, 7500 AE Enschede, The Netherlands
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42
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Czajkowska B, Dobrzynski P, Bero M. Interaction of cells withL-lactide/glycolide copolymers synthesized with the use of tin or zirconium compounds. J Biomed Mater Res A 2005; 74:591-7. [PMID: 16015641 DOI: 10.1002/jbm.a.30325] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Comparative studies have been carried out on the viability of cells culture and production of collagen on lactide/glycolide copolymers synthesized using zirconium or tin initiators. Cell response of various cell types: fibroblast-like cells, osteoblast-like cells, monocyte/macrophage-like cells has been examined. Cell response depends on the kind of cells and the initiator used during the synthesis of the polymer. In a number of cases the cells grown on materials containing zirconium have been reported to have better survival (for example, Saos2 cells). An enhanced collagen production on these copolymers has been also observed.
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Affiliation(s)
- Barbara Czajkowska
- Department of Immunology, Collegium Medicum of the Jagiellonian University, Cracow, Poland
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Zweers MLT, Grijpma DW, Engbers GHM, Feijen J. The preparation of monodisperse biodegradable polyester nanoparticles with a controlled size. J Biomed Mater Res B Appl Biomater 2003; 66:559-66. [PMID: 12861608 DOI: 10.1002/jbm.b.10046] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In local drug delivery, nanoparticles based on biodegradable polymers can function as vehicles with controlled drug-release properties. To achieve a well-controlled drug-release profile, control over the particle size is of great importance. Therefore, biodegradable polyester nanoparticles were prepared by the salting-out method. Process variables were varied to study the effect on the particle size. The monodisperse particles obtained were between 100 and 400 nm in size and spherical in shape. It was found that the particle size could be adjusted by varying the preparation conditions upon which the polymer concentration had the most pronounced effect.
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Affiliation(s)
- Miechel L T Zweers
- Department of Polymer Chemistry and Biomaterials, Institute for Biomedical Technology, Faculty of Chemical Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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