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Chen Z, Zhang X, Fu Y, Jin Y, Weng Y, Bian X, Chen X. Degradation Behaviors of Polylactic Acid, Polyglycolic Acid, and Their Copolymer Films in Simulated Marine Environments. Polymers (Basel) 2024; 16:1765. [PMID: 39000621 PMCID: PMC11244091 DOI: 10.3390/polym16131765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 06/13/2024] [Accepted: 06/14/2024] [Indexed: 07/17/2024] Open
Abstract
Poly(lactic acid) (PLA) and poly(glycolic acid) (PGA) are extensively studied biodegradable polymers. However, the degradation behavior of their copolymer, poly(lactic-co-glycolic acid) (PLGA), in marine environments has not yet been confirmed. In this study, the changes in macroscopic and microscopic morphology, thermal properties, aggregation, and chemical structure of PLA, PGA, PLGA-85, and PLGA-75 (with 85% and 75% LA content) in simulated marine environments were investigated. Results revealed that degradation occurred through hydrolysis of ester bonds, and the degradation rate of PGA was faster than that of PLA. The amorphous region degraded preferentially over the crystalline region, leading to cleavage-induced crystallization and decreased thermal stability of PLA, PLGA-85, and PLGA-75. The crystal structures of PLGAs were similar to those of PLA, and the higher GA content, the faster was the degradation rate. This study provides a deeper understanding of the seawater degradation behaviors of PLA, PGA, and their copolymers, and provides guidance for the preparation of materials with controllable degradation performance.
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Affiliation(s)
- Zeyu Chen
- College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Xi Zhang
- College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Ye Fu
- College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Yujuan Jin
- College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Yunxuan Weng
- College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Xinchao Bian
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Xuesi Chen
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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De Falco F, Avolio R, Errico ME, Di Pace E, Avella M, Cocca M, Gentile G. Comparison of biodegradable polyesters degradation behavior in sand. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126231. [PMID: 34492985 DOI: 10.1016/j.jhazmat.2021.126231] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/12/2021] [Accepted: 05/24/2021] [Indexed: 06/13/2023]
Abstract
Sandy beaches represent environmental compartments particularly vulnerable to litter pollution, and they reflect the magnitude of pollution of adjacent compartments: water and coastal areas. The substitution of conventional polymers by biodegradable materials is generally considered as an alternative for reducing environmental accumulation of plastic debris. The present study is aimed to investigate the degradation of poly(lactic acid), poly(ε-caprolactone), poly(butylenesuccinate adipate) and poly(3-hydroxybutyrate) buried in sand for 267 days, simulating them as beach litter. The analysed polyesters showed different degradation mechanisms and kinetics. PLA is mainly subjected to weathering by physical aging; after an initial faster degradation of the amorphous phase, PCL showed a decrease of its degradation rate; similarly to PCL, the degradation of PBSA started from the amorphous phase; PHB is clearly subjected to biological degradation. The degradation trend of the investigated materials in sand decreased in the order PHB > PBSA > PCL > PLA. PLA, PCL and PBSA did not undergo complete degradation in sand during the testing time.
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Affiliation(s)
- Francesca De Falco
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy
| | - Roberto Avolio
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy
| | - Maria Emanuela Errico
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy
| | - Emilia Di Pace
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy
| | - Maurizio Avella
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy
| | - Mariacristina Cocca
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy.
| | - Gennaro Gentile
- Institute for Polymers, Composites and Biomaterials - National Research Council of Italy, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy
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Long-Acting Risperidone Dual Control System: Preparation, Characterization and Evaluation In Vitro and In Vivo. Pharmaceutics 2021; 13:pharmaceutics13081210. [PMID: 34452171 PMCID: PMC8399464 DOI: 10.3390/pharmaceutics13081210] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 12/24/2022] Open
Abstract
Schizophrenia, a psychiatric disorder, requires long-term treatment; however, large fluctuations in blood drug concentration increase the risk of adverse reactions. We prepared a long-term risperidone (RIS) implantation system that can stabilize RIS release and established in-vitro and in-vivo evaluation systems. Cumulative release, drug loading, and entrapment efficiency were used as evaluation indicators to evaluate the effects of different pore formers, polymer ratios, porogen concentrations, and oil–water ratios on a RIS implant (RIS-IM). We also built a mathematical model to identify the optimized formulation by stepwise regression. We also assessed the crystalline changes, residual solvents, solubility and stability after sterilization, in-vivo polymer degradation, pharmacokinetics, and tissue inflammation in the case of the optimized formulation. The surface of the optimized RIS microspheres was small and hollow with 134.4 ± 3.5 µm particle size, 1.60 SPAN, 46.7% ± 2.3% implant drug loading, and 93.4% entrapment efficiency. The in-vitro dissolution behavior of RIS-IM had zero-order kinetics and stable blood concentration; no lag time was released for over three months. Furthermore, the RIS-IM was not only non-irritating to tissues but also had good biocompatibility and product stability. Long-acting RIS-IMs with microspheres and film coatings can provide a new avenue for treating schizophrenia.
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Park S, Lee K, Kang H, Lee Y, Lee J, Kim JH, Song HB, Ryu W. Single Administration of a Biodegradable, Separable Microneedle Can Substitute for Repeated Application of Eyedrops in the Treatment of Infectious Keratitis. Adv Healthc Mater 2021; 10:e2002287. [PMID: 33930253 DOI: 10.1002/adhm.202002287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 03/22/2021] [Indexed: 11/07/2022]
Abstract
Infectious keratitis is mainly treated with topical antibiotics. To achieve and maintain the required therapeutic concentration in the cornea where the tear fluid continuously rinses the surface, the antibiotics must be frequently applied, even while the patient is sleeping, and oral medication is sometimes required. However, the inevitably poor compliance and avascular nature of the cornea decrease drug bioavailability. In this study, a single microneedle (MN) is injected into the cornea to substitute for the repeated application of eyedrops in the treatment of infectious keratitis. After comparing the mechanical integrity and drug release profiles of three different drug-tips, the drug-tip with the "high" drug concentration that releases 12.5 ng drug within 3 days is applied to a cornea to evaluate the transferability and in vivo drug release. In the treatment of infectious keratitis with repeated application of eyedrops for six consecutive days, a single MN injection is substituted for the initial 3 days of eyedrop applications. The progression remains similarly attenuated after 3 days without eyedrops, and comparable efficacy is achieved on day 6 when combined with delayed eyedrop treatment from day 3. Thus, the single administration of a biodegradable MN can substitute for the repeated application of eyedrops in the treatment of infectious keratitis.
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Affiliation(s)
- SeungHyun Park
- Department of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - KangJu Lee
- Department of Healthcare and Biomedical Engineering, Chonnam National University, Yeosu, 59626, Republic of Korea
| | - Heekyoung Kang
- Department of Tropical Medicine and Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Ophthalmology, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - YeJin Lee
- Department of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - JiYong Lee
- Department of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jeong Hun Kim
- Department of Tropical Medicine and Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Ophthalmology, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Hyun Beom Song
- Department of Tropical Medicine and Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Ophthalmology, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - WonHyoung Ryu
- Department of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea
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Wang X, Ronsin O, Gravez B, Farman N, Baumberger T, Jaisser F, Coradin T, Hélary C. Nanostructured Dense Collagen-Polyester Composite Hydrogels as Amphiphilic Platforms for Drug Delivery. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2004213. [PMID: 33854901 PMCID: PMC8025010 DOI: 10.1002/advs.202004213] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Indexed: 05/15/2023]
Abstract
Associating collagen with biodegradable hydrophobic polyesters constitutes a promising method for the design of medicated biomaterials. Current collagen-polyester composite hydrogels consisting of pre-formed polymeric particles encapsulated within a low concentrated collagen hydrogel suffer from poor physical properties and low drug loading. Herein, an amphiphilic composite platform associating dense collagen hydrogels and up to 50 wt% polyesters with different hydrophobicity and chain length is developed. An original method of fabrication is disclosed based on in situ nanoprecipitation of polyesters impregnated in a pre-formed 3D dense collagen network. Composites made of poly(lactic-co-glycolic acid) (PLGA) and poly(lactic acid) (PLA) but not polycaprolactone (PCL) exhibit improved mechanical properties compared to those of pure collagen dense hydrogels while keeping a high degree of hydration. Release kinetics of spironolactone, a lipophilic steroid used as a drug model, can be tuned over one month. No cytotoxicity of the composites is observed on fibroblasts and keratinocytes. Unlike the incorporation of pre-formed particles, the new process allows for both improved physical properties of collagen hydrogels and controlled drug delivery. The ease of fabrication, wide range of accessible compositions, and positive preliminary safety evaluations of these collagen-polyesters will favor their translation into clinics in wide areas such as drug delivery and tissue engineering.
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Affiliation(s)
- Xiaolin Wang
- School of Pharmacy and State Key Laboratory of Quality Research in Chinese MedicineMacau University of Science and TechnologyTaipaMacao999078China
- Sorbonne UniversitéCNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de ParisParisF‐75005France
| | - Olivier Ronsin
- Sorbonne UniversitéCNRSInstitut des NanoSciences de ParisINSPParisF‐75005France
- Université de ParisParisF‐75006France
| | - Basile Gravez
- INSERMCentre de Recherche des CordeliersSorbonne UniversitéUniversité de ParisParisF‐75005France
| | - Nicolette Farman
- INSERMCentre de Recherche des CordeliersSorbonne UniversitéUniversité de ParisParisF‐75005France
| | - Tristan Baumberger
- Sorbonne UniversitéCNRSInstitut des NanoSciences de ParisINSPParisF‐75005France
- Université de ParisParisF‐75006France
| | - Frédéric Jaisser
- INSERMCentre de Recherche des CordeliersSorbonne UniversitéUniversité de ParisParisF‐75005France
| | - Thibaud Coradin
- Sorbonne UniversitéCNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de ParisParisF‐75005France
| | - Christophe Hélary
- Sorbonne UniversitéCNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de ParisParisF‐75005France
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Barani H, Haseloer A, Mathur S, Klein A. Sustained release of a thiosemicarbazone from antibacterial electrospun poly(lactic‐co‐glycolic acid) fiber mats. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Alexander Haseloer
- Department of Chemistry, Institute for Inorganic Chemistry University of Cologne Cologne Germany
| | - Sanjay Mathur
- Department of Chemistry, Institute for Inorganic Chemistry University of Cologne Cologne Germany
| | - Axel Klein
- Department of Carpet University of Birjand Birjand Iran
- Department of Chemistry, Institute for Inorganic Chemistry University of Cologne Cologne Germany
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7
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Role of hydrolytic degradation of polylactide drug carriers in developing micro- and nanoscale polylactide-based drug dosage forms. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2918-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Chor A, Gonçalves RP, Costa AM, Farina M, Ponche A, Sirelli L, Schrodj G, Gree S, de Andrade LR, Anselme K, Dias ML. In Vitro Degradation of Electrospun Poly(Lactic-Co-Glycolic Acid) (PLGA) for Oral Mucosa Regeneration. Polymers (Basel) 2020; 12:polym12081853. [PMID: 32824776 PMCID: PMC7465081 DOI: 10.3390/polym12081853] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 12/26/2022] Open
Abstract
Poly(lactic-co-glycolic acid) (PLGA) has been used in the field of tissue engineering as a scaffold due to its good biocompatibility, biodegradability and mechanical strength. With the aim to explore the degradability of PLGA electrospun nonwoven structures for oral mucosa tissue engineering applications, non-irradiated and gamma irradiated nonwovens were immersed in three different solutions, in which simulated body fluid (SBF) and artificial saliva are important for future oral mucosa tissue engineering. The nonwovens were immersed for 7, 15 and 30 days in SBF, culture media (DMEM) and artificial saliva at 37 °C. Before immersion in the solutions, the dosage of 15 kGy was applied for sterilization in one assay and compared with non-irradiated samples at the same timepoints. Samples were characterized using different techniques such as scanning electron microscopy (SEM), differential scanning calorimetric (DSC) and gel permeation chromatography (GPC) to evaluate the nonwoven degradation and Fourier-transform infrared spectroscopy (FTIR) to evaluate the chain scissions. Our results showed that PLGA nonwovens were constituted by semicrystalline fibers with moderate degradation properties up to thirty days. The non-irradiated samples exhibited slower kinetics of degradation than irradiated nonwovens. For immersion times longer than 7 days in the three different solutions, the mean diameter of irradiated fibers stayed in the same range, but significantly different from the control sample. On non-irradiated samples, the degradation kinetics was slower and the plateau in the diameter value was only attained after 30 days of immersion in the fluids. Plasticization (fluid absorption into the fiber structure) occurred in the bulk material, as confirmed by a decrease in Tg observed by DSC analyses of non-irradiated and irradiated nonwovens, in comparison with the respective controls. In addition, artificial saliva showed a higher capacity of influencing PLGA crystallization than SBF and DMEM. FTIR analyses showed typical PLGA chemical functional groups changes. These results will be important for future application of those PLGA electrospun nonwovens for oral mucosa regeneration.
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Affiliation(s)
- Ana Chor
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Raquel Pires Gonçalves
- Institute of Macromolecules Professor Eloisa Mano, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil; (R.P.G.); (L.S.)
| | - Andrea Machado Costa
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Marcos Farina
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Arnaud Ponche
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Lys Sirelli
- Institute of Macromolecules Professor Eloisa Mano, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil; (R.P.G.); (L.S.)
| | - Gautier Schrodj
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Simon Gree
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Leonardo Rodrigues de Andrade
- Biomineralization Laboratory, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (A.C.); (A.M.C.); (M.F.); (L.R.d.A.)
| | - Karine Anselme
- The Mulhouse Materials Science Institute (IS2M), CNRS, University of Haute-Alsace, CNRS, UMR 7361, F-68100 Mulhouse, France; (A.P.); (G.S.); (S.G.); (K.A.)
- University of Strasbourg, F-67081 Strasbourg, France
| | - Marcos Lopes Dias
- Institute of Macromolecules Professor Eloisa Mano, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, Brazil; (R.P.G.); (L.S.)
- Correspondence:
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R.S. P, Bomb K, Srivastava R, Bandyopadhyaya R. Dual drug delivery of curcumin and niclosamide using PLGA nanoparticles for improved therapeutic effect on breast cancer cells. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02092-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Yan X, Li W, Zhang X, Liu S, Qu H. Development of an on-line Raman spectral analytical method for monitoring and endpoint determination of the Cornu Caprae Hircus hydrolysis process. J Pharm Pharmacol 2019; 72:132-148. [PMID: 31713245 DOI: 10.1111/jphp.13186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 10/21/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Cornu Caprae Hircus (goat horn, GH), a medicinal animal horn, is frequently used in traditional Chinese medicine, and hydrolysis is one of the most important processes for GH pretreatment in pharmaceutical manufacturing. In this study, on-line Raman spectroscopy was applied to monitor the GH hydrolysis process by the development of partial least squares (PLS) calibration models for different groups of amino acids. METHODS Three steps were considered in model development. In the first step, design of experiments (DOE)-based preprocessing method selection was conducted. In the second step, the optimal spectral co-addition number was determined. In the third step, sample selection or reconstruction methods based on hierarchical clustering analysis (HCA) were used to extract or reconstruct representative calibration sets from the pool of hydrolysis process samples and investigated for their ability to improve model performance. KEY FINDINGS This study has shown the feasibility of using on-line Raman spectral analysis for monitoring the GH hydrolysis process based on the designed measurement system and appropriate model development steps. CONCLUSIONS The proposed Raman-based calibration models are expected to be used in GH hydrolysis process monitoring, leading to more rapid material information acquisition, deeper process understanding, more accurate endpoint determination and thus better product quality consistency.
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Affiliation(s)
- Xu Yan
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Wenlong Li
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xiaoli Zhang
- Shanghai Kaibao Pharmaceutical Co., Ltd, Shanghai, China
| | - Shaoyong Liu
- Shanghai Kaibao Pharmaceutical Co., Ltd, Shanghai, China
| | - Haibin Qu
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
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11
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In Vitro Physico-Chemical Characterization and Standardized In Vivo Evaluation of Biocompatibility of a New Synthetic Membrane for Guided Bone Regeneration. MATERIALS 2019; 12:ma12071186. [PMID: 30978950 PMCID: PMC6479290 DOI: 10.3390/ma12071186] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 12/26/2022]
Abstract
This study’s aim was to evaluate the biocompatibility and bioabsorption of a new membrane for guided bone regeneration (polylactic-co-glycolic acid associated with hydroxyapatite and β-tricalcium phosphate) with three thicknesses (200, 500, and 700 µm) implanted in mice subcutaneously. Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and the quantification of carbon, hydrogen and nitrogen were used to characterize the physico-chemical properties. One hundred Balb-C mice were divided into 5 experimental groups: Group 1—Sham (without implantation); Group 2—200 μm; Group 3—500 μm; Group 4—700 μm; and Group 5—Pratix®. Each group was subdivided into four experimental periods (7, 30, 60 and 90 days). Samples were collected and processed for histological and histomorphometrical evaluation. The membranes showed no moderate or severe tissue reactions during the experimental periods studied. The 500-μm membrane showed no tissue reaction during any experimental period. The 200-μm membrane began to exhibit fragmentation after 30 days, while the 500-μm and 700-µm membranes began fragmentation at 90 days. All membranes studied were biocompatible and the 500 µm membrane showed the best results for absorption and tissue reaction, indicating its potential for clinical guided bone regeneration.
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12
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Zhang Y, Fei S, Yu M, Guo Y, He H, Zhang Y, Yin T, Xu H, Tang X. Injectable sustained release PLA microparticles prepared by solvent evaporation-media milling technology. Drug Dev Ind Pharm 2018; 44:1591-1597. [PMID: 29847181 DOI: 10.1080/03639045.2018.1483382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
The objective of this study was to develop agomelatine (AGM) intramuscular sustained release PLA microparticles by using solvent evaporation combined with wet milling technology. The final preparation had a regular and homogeneous particle size of approximately 35 µm, as measured by laser diffraction particle size analysis and scanning electron microscopy (SEM). The drug was confirmed to be within the carrier in an amorphous state through differential scanning calorimetry (DSC) and power X-ray diffraction (PXRD) experiments. Additionally, Fourier transform infrared spectroscopy (FT-IR) analysis was applied to confirm that there was hydrogen bonding between the drug and polymer at the molecular level. In vitro release experiments indicated that the drug could achieve long-term sustained release over the period of one month, with only a 3.07% burst release, due to the involvement of the polymer and removal of drug adsorbed on the surface during the wet grinding process. The dominant release mechanism was considered to be diffusion of the drugs in the initial period. Following this, with the hydrolysis of PLA to form a colloidal viscous layer, drug release is due to the combined effect of diffusion and erosion of the polymer matrix. Additionally, drug release behavior is closely related to the degradation mechanism of the polymer carrier. The results suggest that AGM could be developed as a potential delivery system for long-acting intramuscular administration with extensive application prospects.
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Affiliation(s)
- Yan Zhang
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Siyang Fei
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Meiling Yu
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Yuting Guo
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Haibing He
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Yu Zhang
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Tian Yin
- b Department of Functional Food and Wine , Shenyang Pharmaceutical University , Shenyang , China
| | - Hui Xu
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
| | - Xing Tang
- a Department of Pharmaceutics , School of Pharmacy , Shenyang , China
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13
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Hu H, Tang Y, Pang L, Lin C, Huang W, Wang D, Jia W. Angiogenesis and Full-Thickness Wound Healing Efficiency of a Copper-Doped Borate Bioactive Glass/Poly(lactic- co-glycolic acid) Dressing Loaded with Vitamin E in Vivo and in Vitro. ACS APPLIED MATERIALS & INTERFACES 2018; 10:22939-22950. [PMID: 29924595 DOI: 10.1021/acsami.8b04903] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
There is an urgent demand for wound healing biomaterials because of the increasing frequency of traffic accidents, industrial contingencies, and natural disasters. Borate bioactive glass has potential applications in bone tissue engineering and wound healing; however, its uncontrolled release runs a high risk of rapid degradation and transient biotoxicity. In this study, a novel organic-inorganic dressing of copper-doped borate bioactive glass/poly(lactic- co-glycolic acid) loaded with vitamin E (0-3.0 wt % vitamin E) was fabricated to evaluate its efficiency for angiogenesis in cells and full-thickness skin wounds healing in rodents. In vitro results showed the dressing was an ideal interface for the organic-inorganic mixture and a controlled release system for Cu2+ and vitamin E. Cell culture suggested the ionic dissolution product of the copper-doped and vitamin E-loaded dressing showed the best migration, tubule formation, and vascular endothelial growth factor (VEGF) secretion in human umbilical vein endothelial cells (HUVECs) and higher expression levels of angiogenesis-related genes in fibroblasts in vitro. Furthermore, this dressing also suggested a significant improvement in the epithelialization of wound closure and an obvious enhancement in vessel sprouting and collagen remodeling in vivo. These results indicate that the copper-doped borate bioactive glass/poly(lactic- co-glycolic acid) dressing loaded with vitamin E is effective in stimulating angiogenesis and healing full-thickness skin defects and is a promising wound dressing in the reconstruction of full-thickness skin injury.
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Affiliation(s)
- Haoran Hu
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital , Shanghai Jiao Tong University , Shanghai 200233 , China
| | - Yue Tang
- School of Material Science and Engineering , Tongji University , Caoan Road , Shanghai 201800 , China
| | - Libin Pang
- School of Material Science and Engineering , Tongji University , Caoan Road , Shanghai 201800 , China
| | - Cunlong Lin
- School of Material Science and Engineering , Tongji University , Caoan Road , Shanghai 201800 , China
| | - Wenhai Huang
- School of Material Science and Engineering , Tongji University , Caoan Road , Shanghai 201800 , China
| | - Deping Wang
- School of Material Science and Engineering , Tongji University , Caoan Road , Shanghai 201800 , China
| | - Weitao Jia
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital , Shanghai Jiao Tong University , Shanghai 200233 , China
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Muroga S, Hikima Y, Ohshima M. Visualization of hydrolysis in polylactide using near-infrared hyperspectral imaging and chemometrics. J Appl Polym Sci 2017. [DOI: 10.1002/app.45898] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Shun Muroga
- Department of Chemical Engineering, Graduate School of Engineering; Katsura-Campus, Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
| | - Yuta Hikima
- Department of Chemical Engineering, Graduate School of Engineering; Katsura-Campus, Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
| | - Masahiro Ohshima
- Department of Chemical Engineering, Graduate School of Engineering; Katsura-Campus, Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
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15
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Ginjupalli K, Shavi GV, Averineni RK, Bhat M, Udupa N, Nagaraja Upadhya P. Poly(α-hydroxy acid) based polymers: A review on material and degradation aspects. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.08.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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16
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Jia W, Luo Y, Yu J, Liu B, Hu M, Chai L, Wang C. Effects of high-repetition-rate femtosecond laser micromachining on the physical and chemical properties of polylactide (PLA). OPTICS EXPRESS 2015; 23:26932-26939. [PMID: 26480354 DOI: 10.1364/oe.23.026932] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effects of femtosecond laser ablation, with 115 fs pulses at 1040 nm wavelength and 57 MHz repetition-rate, on the physical and chemical properties of polylactide (PLA) were studied in air and in water. The surface of the PLA sample ablated by high-repetition-rate femtosecond laser was analysed using field emission scanning electron microscopy, infrared spectroscopy, raman spectroscopy, as well as X-ray photoelectron spectroscopy. Compared with the experiments in the air at ambient temperature, melting resolidification was negligible for the experiments conducted under water. Neither in air nor under water did oxidation and crystallization process take place in the laser ablated surface. In addition, the intensity of some oxygen related peaks increased for water experiments, probably due to the hydrolysis. Meantime, the chemical shift to higher energies appeared in C1s XPS spectrum of laser processing in water. Interestingly, a large amount of defects were observed after laser processing in air, while no significant change was shown under water experiments. This indicates that thermal and mechanical effects by high-repetition-rate femtosecond laser ablation in water are quite limited, which could be even ignored.
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17
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Yusop AHM, Daud NM, Nur H, Kadir MRA, Hermawan H. Controlling the degradation kinetics of porous iron by poly(lactic-co-glycolic acid) infiltration for use as temporary medical implants. Sci Rep 2015; 5:11194. [PMID: 26057073 PMCID: PMC4460907 DOI: 10.1038/srep11194] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 05/15/2015] [Indexed: 11/09/2022] Open
Abstract
Iron and its alloy have been proposed as biodegradable metals for temporary medical implants. However, the formation of iron oxide and iron phosphate on their surface slows down their degradation kinetics in both in vitro and in vivo scenarios. This work presents new approach to tailor degradation behavior of iron by incorporating biodegradable polymers into the metal. Porous pure iron (PPI) was vacuum infiltrated by poly(lactic-co-glycolic acid) (PLGA) to form fully dense PLGA-infiltrated porous iron (PIPI) and dip coated into the PLGA to form partially dense PLGA-coated porous iron (PCPI). Results showed that compressive strength and toughness of the PIPI and PCPI were higher compared to PPI. A strong interfacial interaction was developed between the PLGA layer and the iron surface. Degradation rate of PIPI and PCPI was higher than that of PPI due to the effect of PLGA hydrolysis. The fast degradation of PIPI did not affect the viability of human fibroblast cells. Finally, this work discusses a degradation mechanism for PIPI and the effect of PLGA incorporation in accelerating the degradation of iron.
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Affiliation(s)
- Abdul Hakim Md Yusop
- Medical Devices Technology Group (MediTeg), Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia
| | - Nurizzati Mohd Daud
- Medical Devices Technology Group (MediTeg), Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia
| | - Hadi Nur
- Center for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia
| | - Mohammed Rafiq Abdul Kadir
- Medical Devices Technology Group (MediTeg), Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia
| | - Hendra Hermawan
- Medical Devices Technology Group (MediTeg), Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia
- Dept. of Mining, Metallurgical and Materials Engineering & CHU de Québec Research Center, Laval University, Quebec City, G1V 0A6, Canada
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18
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Suzuki T, Ei A, Takada Y, Uehara H, Yamanobe T, Takahashi K. Modification of physical properties of poly(L-lactic acid) by addition of methyl-β-cyclodextrin. Beilstein J Org Chem 2015; 10:2997-3006. [PMID: 25670970 PMCID: PMC4311664 DOI: 10.3762/bjoc.10.318] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 11/24/2014] [Indexed: 11/29/2022] Open
Abstract
Poly(L-lactic acid) (PLLA) is a biodegradable plastic and one of the most famous plastics made from biobased materials. However, its physical strength is insufficient compared to general-purpose plastics. In this study, the effect of methylcyclodextrin (MeCD) addition on the structure and physical properties, especially the drawing behavior, of PLLA was investigated. Through thermal analysis, it was found that MeCD addition lowers the crystallinity and enhances the mobility of PLLA. The sample containing approximately 17% MeCD was drawn to more than 1000% at 60 °C, although PLLA fractured at a strain of less than 100%. Differential scanning calorimetry (DSC)-Raman in situ measurements also revealed decreases in the glass transition temperature (Tg), cold crystallization temperature (Tc), and melting point (Tm), and improvement in structural distribution with temperature. DSC-Raman measurements simultaneously supplied information about crystallinity and thermal properties. Thus, it was concluded that MeCD had high affinity for PLLA, and the addition of MeCD increased the amorphous component of PLLA and enhanced the drawability.
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Affiliation(s)
- Toshiyuki Suzuki
- Perkin-Elmer Japan Co. Ltd., 134 Godo-cho, Hodogaya-ku, Yokohama-shi 240-0004, Japan; ; Gunma University, 1-5-1 Tenjin-cho, Kiryu-shi, Gunma 376-8515, Japan; Fax: +81-277-30-1331
| | - Ayaka Ei
- Gunma University, 1-5-1 Tenjin-cho, Kiryu-shi, Gunma 376-8515, Japan
| | - Yoshihisa Takada
- Gunma University, 1-5-1 Tenjin-cho, Kiryu-shi, Gunma 376-8515, Japan
| | - Hiroki Uehara
- Gunma University, 1-5-1 Tenjin-cho, Kiryu-shi, Gunma 376-8515, Japan
| | - Takeshi Yamanobe
- Gunma University, 1-5-1 Tenjin-cho, Kiryu-shi, Gunma 376-8515, Japan
| | - Keiko Takahashi
- Tokyo Polytechnic University, 1583 Iiyama, Atsugi 243-0297, Japan; Fax +81-46-242-3000
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Degradation mechanisms of bioresorbable polyesters. Part 1. Effects of random scission, end scission and autocatalysis. Acta Biomater 2014; 10:2223-32. [PMID: 24384126 DOI: 10.1016/j.actbio.2013.12.039] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 09/26/2013] [Accepted: 12/17/2013] [Indexed: 11/24/2022]
Abstract
A mathematical model was developed to relate the degradation trend of bioresorbable polymers to different underlying hydrolysis mechanisms, including noncatalytic random scission, autocatalytic random scission, noncatalytic end scission or autocatalytic end scission. The effect of each mechanism on molecular weight degradation and potential mass loss was analysed. A simple scheme was developed to identify the most likely hydrolysis mechanism based on experimental data. The scheme was first demonstrated using case studies, then used to evaluate data collected from 31 publications in the literature to identify the dominant hydrolysis mechanisms for typical biodegradable polymers. The analysis showed that most of the experimental data indicates autocatalytic hydrolysis, as expected. However, the study shows that the existing understanding on whether random or end scission controls degradation is inappropriate. It was revealed that pure end scission cannot explain the observed trend in molecular weight reduction because end scission would be too slow to reduce the average molecular weight. On the other hand, pure random scission cannot explain the observed trend in mass loss because too few oligomers would be available to diffuse out of a device. It is concluded that the chain ends are more susceptible to cleavage, which produces most of the oligomers leading to mass loss. However, it is random scission that dominates the reduction in molecular weight.
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20
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Barrett C, Cameron R, Best S. Bioceramic and Biopolymer Nanocomposite Materials for Use in Orthopedic Applications. Tissue Eng Regen Med 2012. [DOI: 10.1201/b13049-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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21
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LeBlon CE, Pai R, Fodor CR, Golding AS, Coulter JP, Jedlicka SS. In vitrocomparative biodegradation analysis of salt-leached porous polymer scaffolds. J Appl Polym Sci 2012. [DOI: 10.1002/app.38321] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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22
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Sabbatier G, Le Nouën D, Chevallier P, Durand B, Laroche G, Dieval F. Air spun poly(lactic acid) nanofiber scaffold degradation for vascular tissue engineering: A 1H NMR study. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.04.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Phong L, Han ESC, Xiong S, Pan J, Loo SCJ. Properties and hydrolysis of PLGA and PLLA cross-linked with electron beam radiation. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.02.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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