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Goshtasbi H, Abdolahinia ED, Fathi M, Movafeghi A, Omidian H, Barar J, Omidi Y. Astaxanthin-loaded alginate-chitosan gel beads activate Nrf2 and pro-apoptotic signalling pathways against oxidative stress. J Microencapsul 2024; 41:140-156. [PMID: 38410930 DOI: 10.1080/02652048.2024.2319048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 02/12/2024] [Indexed: 02/28/2024]
Abstract
Oxidative stress (OS) plays a crucial role in disease development. Astaxanthin (ATX), a valuable natural compound, may reduce OS and serve as a treatment for diseases like neurodegenerative disorders and cancer. Nuclear factor-erythroid 2-related factor 2 (Nrf2) regulates antioxidant enzymes and OS management. We evaluated ATX's antioxidant activity via Alg-CS/ATX gel beads in vitro. ATX-encapsulated alginate-chitosan (Alg-CS/ATX) gel beads were synthesized and structurally/morphologically characterized by SEM, FT-IR, and XRD. Their biological effects were examined in human umbilical vein endothelial cells (HUVECs) treated with H2O2 through MTT assay, Annexin V/PI, cell cycle studies, and western blotting. Alg-CS effectively carried ATX, with high capacity and reduced pore size. Alg-CS/ATX displayed an 84% encapsulation efficiency, maintaining stability for 30 days. In vitro studies showed a 1.4-fold faster release at pH 5.4 than at neutral pH, improving ATX's therapeutic potential. HUVECs treated with Alg-CS/ATX showed enhanced viability via increased Nrf2 expression. Alg-CS gel beads exhibit significant potential as a biocompatible vehicle for delivering ATX to combat OS with considerable opportunity for clinical applications.
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Affiliation(s)
- Hamieh Goshtasbi
- Department of Plant, Cell and Molecular Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elaheh Dalir Abdolahinia
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Oral Science and Translation Research, College of Dental Medicine, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Marziyeh Fathi
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Movafeghi
- Department of Plant, Cell and Molecular Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Hossein Omidian
- Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Jaleh Barar
- Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Yadollah Omidi
- Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
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Chen F, Liu L, Tang D, Zhang H, Wu N, Wang L, Li H, Xiao H, Zhou D. Treatment of Acute Wound Infections by Degradable Polymer Nanoparticle with a Synergistic Photothermal and Chemodynamic Strategy. Adv Sci (Weinh) 2024:e2309624. [PMID: 38408124 DOI: 10.1002/advs.202309624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Indexed: 02/28/2024]
Abstract
Mild-heat photothermal antibacterial therapy avoids heat-induced damage to normal tissues but causes bacterial tolerance. The use of photothermal therapy in synergy with chemodynamic therapy is expected to address this issue. Herein, two pseudo-conjugated polymers PM123 with photothermal units and PFc with ferrocene (Fc) units are designed to co-assemble with DSPE-mPEG2000 into nanoparticle NPM123/Fc . NPM123/Fc under 1064 nm laser irradiation (NPM123/Fc +NIR-II) generates mild heat and additionally more toxic ∙OH from endogenous H2 O2 , displaying a strong synergistic photothermal and chemodynamic effect. NPM123/Fc +NIR-II gives >90% inhibition rates against MDR ESKAPE pathogens in vitro. Metabolomics analysis unveils that NPM123/Fc +NIR-II induces bacterial metabolic dysregulation including inhibited nucleic acid synthesis, disordered energy metabolism, enhanced oxidative stress, and elevated DNA damage. Further, NPM123/Fc +NIR-II possesses >90% bacteriostatic rates at infected wounds in mice, resulting in almost full recovery of infected wounds. Immunodetection and transcriptomics assays disclose that the therapeutic effect is mainly dependent on the inhibition of inflammatory reactions and the promotion of wound healing. What is more, thioketal bonds in NPM123/Fc are susceptible to ROS, making it degradable with highly favorable biosafety in vitro and in vivo. NPM123/Fc +NIR-II with a unique synergistic antibacterial strategy would be much less prone to select bacterial resistance and represent a promising antibiotics-alternative anti-infective measure.
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Affiliation(s)
- Fangzhou Chen
- Graduate School, Guangzhou Medical University, Guangzhou, 511436, P. R. China
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, 100071, P. R. China
| | - Lin Liu
- Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, 100853, P. R. China
| | - Dongsheng Tang
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Hanchen Zhang
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Nier Wu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, 100071, P. R. China
| | - Lin Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, 100071, P. R. China
| | - Hongbo Li
- Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, 100853, P. R. China
| | - Haihua Xiao
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Dongsheng Zhou
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, 100071, P. R. China
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Bae I, Kim BH. Drug release control and anti-inflammatory effect of biodegradable polymer surface modified by gas phase chemical functional reaction. Biomed Mater 2024; 19:025045. [PMID: 38364287 DOI: 10.1088/1748-605x/ad2a38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 02/16/2024] [Indexed: 02/18/2024]
Abstract
The plasma technique has been widely used to modify the surfaces of materials. The purpose of this study was to evaluate the probability of controlling the prednisolone delivery velocity on a polylactic acid (PLA) surface modified by plasma surface treatment. Surface modification of PLA was performed at a low-pressure radio frequency under conditions of 100 W power, 50 mTorr chamber pressure, 100-200 sccm of flow rate, and Ar, O2, and CH4gases. The plasma surface-modified PLA was characterized using scanning emission microscope, x-ray photoelectron spectroscopy (XPS), and contact angle measurements.In vitroevaluations were performed to determine cellular response, drug release behavior, and anti-inflammatory effects. The PLA surface morphology was changed to a porous structure (with a depth of approximately 100 μm) and the surface roughness was also significantly increased. The XPS results demonstrated higher oxygenized carbon contents than those in the non-treated PLA group. The prednisolone holding capacity increased and the release was relatively prolonged in the surface-modified PLA group compared to that in the non-treated PLA group. In addition, cell migration and proliferation significantly increased after PLA treatment alone. The activity of cytokines such as cyclooxygenase-2 (COX-2), tumor necrosis factor-a (TNF-α), interleukin (IL-1β), and IL-6 were considerably reduced in the plasma-treated and prednisolone holding group. Taken together, surface-modified PLA by plasma can provide an alternative approach to conventional physicochemical approaches for sustained anti-inflammatory drug release.
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Affiliation(s)
- Inho Bae
- Convergence Research Center for Treatment of Oral Soft Tissue Disease (MRC), Chosun University, 2 Chosundae 4-gil, Dong-gu, Gwangju 61452, Republic of Korea
| | - Byung-Hoon Kim
- Convergence Research Center for Treatment of Oral Soft Tissue Disease (MRC), Chosun University, 2 Chosundae 4-gil, Dong-gu, Gwangju 61452, Republic of Korea
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Aoki K, Ideta H, Komatsu Y, Tanaka A, Kito M, Okamoto M, Takahashi J, Suzuki S, Saito N. Bone-Regeneration Therapy Using Biodegradable Scaffolds: Calcium Phosphate Bioceramics and Biodegradable Polymers. Bioengineering (Basel) 2024; 11:180. [PMID: 38391666 PMCID: PMC10886059 DOI: 10.3390/bioengineering11020180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/01/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024] Open
Abstract
Calcium phosphate-based synthetic bone is broadly used for the clinical treatment of bone defects caused by trauma and bone tumors. Synthetic bone is easy to use; however, its effects depend on the size and location of the bone defect. Many alternative treatment options are available, such as joint arthroplasty, autologous bone grafting, and allogeneic bone grafting. Although various biodegradable polymers are also being developed as synthetic bone material in scaffolds for regenerative medicine, the clinical application of commercial synthetic bone products with comparable performance to that of calcium phosphate bioceramics have yet to be realized. This review discusses the status quo of bone-regeneration therapy using artificial bone composed of calcium phosphate bioceramics such as β-tricalcium phosphate (βTCP), carbonate apatite, and hydroxyapatite (HA), in addition to the recent use of calcium phosphate bioceramics, biodegradable polymers, and their composites. New research has introduced potential materials such as octacalcium phosphate (OCP), biologically derived polymers, and synthetic biodegradable polymers. The performance of artificial bone is intricately related to conditions such as the intrinsic material, degradability, composite materials, manufacturing method, structure, and signaling molecules such as growth factors and cells. The development of new scaffold materials may offer more efficient bone regeneration.
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Affiliation(s)
- Kaoru Aoki
- Physical Therapy Division, School of Health Sciences, Shinshu University, Matsumoto 390-8621, Japan
| | - Hirokazu Ideta
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
| | - Yukiko Komatsu
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
| | - Atsushi Tanaka
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
| | - Munehisa Kito
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
| | - Masanori Okamoto
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
| | - Jun Takahashi
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
| | - Shuichiro Suzuki
- Department of Orthopaedic Surgery, Matsumoto Medical Center, Matsumoto 390-8621, Japan
| | - Naoto Saito
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Matsumoto 390-8621, Japan
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Patel KP, Lansky AJ, Kelbæk H, Xu B, van Royen N, Johnson TW, Anderson R, Wijns W, Baumbach A. Long-Term Percutaneous Coronary Intervention Outcomes in Chronic Versus Acute Coronary Syndromes (TARGET All Comers Trial). Am J Cardiol 2024; 217:94-101. [PMID: 38350507 DOI: 10.1016/j.amjcard.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/20/2023] [Accepted: 12/08/2023] [Indexed: 02/15/2024]
Abstract
In the Targeted therapy with a localised abluminal coated, low-dose sirolimus-eluting, biodegreadable polymer coronary stent (TARGET; NCT02520180) All Comers trial the biodegradable polymer (BP) sirolimus-eluting FIREHAWK stent was noninferior to the durable polymer (DP) everolimus-eluting XIENCE stent with respect to target lesion failure (TLF) at 1 and 5 years; however, the long-term safety and efficacy in the setting of acute coronary syndromes (ACS) are not known. We sought to assess the long-term outcomes in ACS versus chronic coronary syndromes (CCS) with BP sirolimus-eluting stent (SES) versus DP everolimus-eluting stent (EES). The TARGET AC study was a multicenter, open-label, noninferiority trial of all comer patients randomly allocated 1:1 to BP SES or DP EES (stratified by ST-elevation myocardial infarction and study site). In this predefined substudy, the outcomes were compared based on clinical presentation (ACS vs CCS) and treatment allocation. A total of 1,653 patients were enrolled (728 with ACS and 922 with CCS), with 94% completing the 5-year follow-up. The baseline characteristics were well-matched between the 2 stent types; however, co-morbidities were more prevalent in the CCS than in the ACS population. TLF (15.5% vs 17.7%, p = 0.24), patient-oriented outcomes (32.0% vs 34.4%, p = 0.31), and stent thrombosis (4.1% vs 3.3%, p = 0.40) were similar between patients with ACS and patients with CCS. In the ACS cohort, the outcomes at 5 years for BP SES versus DP EES were similar for TLF (16.0% vs 14.9%, p = 0.70), ischemia-driven target lesion revascularization (5.6% vs 8.3%, p = 0.17), and definite/probable stent thrombosis (2.7% vs 4.6%, p = 0.18). The same was true for the CCS cohort, with 5-year outcomes for BP SES versus DP EES for TLF (18.0% vs 17.4%, p = 0.82), ischemia-driven target lesion revascularization (6.4% vs 5.0%, p = 0.37), and definite/probable stent thrombosis (3.0% vs 1.8%, p = 0.26). In conclusion, in the TARGET AC trial, 1 in 3 patients had a major adverse event at 5 years, irrespective of CCS or ACS presentation. Long-term, the BP sirolimus-eluting FIREHAWK stent was as safe and effective as the DP everolimus-eluting XIENCE stent across the spectrum of clinical presentations.
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Affiliation(s)
- Kush P Patel
- Barts Heart Centre, St Bartholomew's Hospital, London, United Kingdom; Centre for Cardiovascular Medicine and Devices, William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Alexandra J Lansky
- Division of Cardiovascular Medicine, Yale School of Medicine, New Haven, Connecticut
| | - Henning Kelbæk
- Department of Cardiology, Zealand University Hospital, Roskilde, Denmark
| | - Bo Xu
- Fuwai Hospital, National Centre for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China; Peking Union Medical College, Beijing, China
| | - Niels van Royen
- Department of Cardiology, Radbound University, Nijmegen, the Netherlands
| | - Thomas W Johnson
- Bristol Heart Institute, University of Bristol, Bristol, United Kingdom; University Hospitals Bristol NHS Foundation Trust, Bristol, United Kingdom
| | - Richard Anderson
- Department of Cardiology, University Hospital of Wales, Heath Park, Cardiff, United Kingdom
| | - William Wijns
- The Lambe Institute for Translational Medicine and Curam, University of Galway, Galway, Ireland
| | - Andreas Baumbach
- Barts Heart Centre, St Bartholomew's Hospital, London, United Kingdom; Centre for Cardiovascular Medicine and Devices, William Harvey Research Institute, Queen Mary University of London, London, United Kingdom.
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6
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Shi O, Li P, Yang C, Jiang H, Qin L, Liu W, Li X, Chen Z. Melting Behaviors of Bio-Based Poly(propylene 2,5-furan dicarboxylate)-b-poly(ethylene glycol) Co Polymers Related to Their Crystal Morphology. Polymers (Basel) 2023; 16:97. [PMID: 38201762 PMCID: PMC10780312 DOI: 10.3390/polym16010097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/15/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
In this experiment, a series of poly(propylene 2,5-furan dicarboxylate)-b-poly(ethylene glycol) (PPFEG) copolymers with different ratios were synthesized using melt polycondensation of dimethylfuran-2,5-dicarboxylate (DMFD), 1,3-propanediol (PDO) and poly(ethylene glycol) (PEG). The effect of PEG content on the crystallization behavior of the poly(propylene 2,5-furan dicarboxylate) (PPF) copolymers was investigated. For PPF, the nucleation density of the β-crystals was higher than that of α-crystals. As Tc increases, the β crystals are suppressed more, but at Tc = 140 °C, the bulk of PPF has already been converted to α crystals, which crystallize faster at higher nucleation densities, resulting in a difference in polymer properties. For this case, we chose to add a soft segment material, PEG, which led to an early multi-melt crystallization behavior of the PPF. The addition of PEG led to a decrease in the crystallization temperature of PPF, as well as a decrease in the cold crystallization peak of PPF. From the crystalline morphology, it can be seen that the addition of PEG caused the transformation of the PPF crystalline form to occur earlier. From the crystalline morphology of PPF at 155 °C, it can be observed that the ring-banded spherical crystals of the PPF appear slowly with increasing time. With the addition of PEG, spherical crystals of the ring band appeared earlier, and even appeared first, and then disappeared slowly.
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Affiliation(s)
- Ouyang Shi
- School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China; (O.S.); (C.Y.); (W.L.)
| | - Peng Li
- School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China; (O.S.); (C.Y.); (W.L.)
- Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources, College of Materials and Environmental Engineering, Hezhou University, Hezhou 542899, China; (H.J.); (L.Q.)
| | - Chao Yang
- School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China; (O.S.); (C.Y.); (W.L.)
| | - Haitian Jiang
- Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources, College of Materials and Environmental Engineering, Hezhou University, Hezhou 542899, China; (H.J.); (L.Q.)
| | - Liyue Qin
- Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources, College of Materials and Environmental Engineering, Hezhou University, Hezhou 542899, China; (H.J.); (L.Q.)
| | - Wentao Liu
- School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China; (O.S.); (C.Y.); (W.L.)
| | - Xiaolin Li
- Guangxi HuaLong Resin Co., Ltd., Hezhou 542899, China;
| | - Zhenming Chen
- School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China; (O.S.); (C.Y.); (W.L.)
- Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources, College of Materials and Environmental Engineering, Hezhou University, Hezhou 542899, China; (H.J.); (L.Q.)
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van der Wijk AE, Georgakopoulou T, Steendam R, Zuidema J, Hordijk PL, Bakker ENTP, van Bavel E. Extravasation of biodegradable microspheres in the rat brain. Drug Deliv 2023; 30:2194579. [PMID: 36994503 PMCID: PMC10064830 DOI: 10.1080/10717544.2023.2194579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
Abstract
Drug development for neurological diseases is greatly impeded by the presence of the blood-brain barrier (BBB). We and others previously reported on extravasation of micrometer-sized particles from the cerebral microcirculation - across the BBB - into the brain tissue over the course of several weeks. This mechanism could potentially be used for sustained parenchymal drug delivery after extravasation of biodegradable microspheres. As a first step toward this goal, we set out to evaluate the extravasation potential in the rat brain of three classes of biodegradable microspheres with drug-carrying potential, having a median diameter of 13 µm (80% within 8-18 µm) and polyethylene glycol concentrations of 0%, 24% and 36%. Extravasation, capillary recanalization and tissue damage were determined in a rat cerebral microembolization model at day 14 after microsphere injection. Microspheres of all three classes had the potential to extravasate from the vessel into the brain parenchyma, with microspheres without polyethylene glycol extravasating the fastest. Microembolization with biodegradable microspheres led to impaired local capillary perfusion, which was substantially restored after bead extravasation. We did not observe overt tissue damage after microembolization with any microsphere: we found very limited BBB disruption (IgG extravasation), no microgliosis (Iba1 staining) and no large neuronal infarctions (NeuN staining). In conclusion, biodegradable microspheres with different polymer compositions can extravasate into the brain parenchyma while causing minimal tissue damage.
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Affiliation(s)
- Anne-Eva van der Wijk
- Deparment of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Neurovascular Disorders Program, Amsterdam Neuroscience, The Netherlands
- Microcirculation Program, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Theodosia Georgakopoulou
- Deparment of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Neurovascular Disorders Program, Amsterdam Neuroscience, The Netherlands
- Microcirculation Program, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Rob Steendam
- InnoCore Pharmaceuticals, Groningen, The Netherlands
| | - Johan Zuidema
- InnoCore Pharmaceuticals, Groningen, The Netherlands
| | - Peter L Hordijk
- Neurovascular Disorders Program, Amsterdam Neuroscience, The Netherlands
- Microcirculation Program, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
- Deparment of Physiology, Amsterdam UMC Location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Erik N T P Bakker
- Deparment of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Neurovascular Disorders Program, Amsterdam Neuroscience, The Netherlands
- Microcirculation Program, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Ed van Bavel
- Deparment of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Neurovascular Disorders Program, Amsterdam Neuroscience, The Netherlands
- Microcirculation Program, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
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Lam DL, Cheng YT, Huang CJ. Biodegradable and pH-Responsive Amphiphilic Poly(succinimide) Derivatives for Triggered Release of Antibiotics for Management of Infected Wounds. ACS Appl Mater Interfaces 2023; 15:53297-53309. [PMID: 37947480 DOI: 10.1021/acsami.3c12939] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Wound infection has become a healthy economic burden globally. Current wound management mainly relies on the use of antibiotics; however, the misuse and overuse of antibiotics can easily result in antibiotic resistance. This study proposes a biodegradable, biocompatible, and pH-responsive amphiphilic 11-aminoundecanoic acid-grafted polysuccinimide (AUA-PSI) as a nanocarrier for drug encapsulation via nanoprecipitation. The succinimide groups in the backbone of PSI allow facile postfunctionalization via an aminolysis reaction. The degree of substitution of AUA can be modulated to adjust the degradation rate, pH sensitivity, and drug-release profile. Antibiotic rifampicin was incorporated with AUA-PSI to form Rif-AUA-PSI nanoparticles and demonstrated pH-responsiveness and antimicrobial activity. Because of the elevation of the pH value from pH = ∼ 5.5 in healthy skin to pH > 7 in an infected wound, Rif-AUA-PSI nanoparticles begin to decompose and release Rif upon the hydrolysis of succinimide/amide and deprotonation of carboxyl groups. The effective suppression of bacterial growth by Rif-AUA-PSI nanoparticles was demonstrated using a plate count method. More importantly, Rif-AUA-PSI nanoparticles were physically deposited on cotton gauze bandages as an antibiotic wound dressing. The Rif-AUA-PSI-modified gauze was applied to infected wounds on rats for wound management. The results show fast wound healing and inhibition of bacterial growth, which demonstrate that the method promotes modulable amphiphilicity, biodegradability, biocompatibility, pH-responsiveness, and facile modification for nanomedicine and medical devices.
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Affiliation(s)
- Dieu-Linh Lam
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Ying-Tzu Cheng
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Chun-Jen Huang
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, 200 Chung Pei Rd., Chung-Li City 32023, Taiwan
- NCU-Covestro Research Center, National Central University, Jhong-Li, Taoyuan 320, Taiwan
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Madkhali OA. Drug Delivery of Gelatin Nanoparticles as a Biodegradable Polymer for the Treatment of Infectious Diseases: Perspectives and Challenges. Polymers (Basel) 2023; 15:4327. [PMID: 37960007 PMCID: PMC10648051 DOI: 10.3390/polym15214327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/31/2023] [Accepted: 11/03/2023] [Indexed: 11/15/2023] Open
Abstract
In recent years, there has been a growing interest in the use of gelatin nanoparticles (GNPs) for the treatment of infectious diseases. The inherent properties of these nanoparticles make them attractive options for drug delivery. Their biocompatibility ensures that they can interact with biological systems without causing adverse reactions, while their biodegradability ensures that they can break down harmlessly in the body once their function is performed. Furthermore, their capacity for controlled drug release ensures that therapeutic agents can be delivered over a sustained period, thereby enhancing treatment efficacy. This review examines the current landscape of GNP-based drug delivery, with a specific focus on its potential applications and challenges in the context of infectious diseases. Key challenges include controlling drug release rates, ensuring nanoparticle stability under physiological conditions, scaling up production while maintaining quality, mitigating potential immunogenic reactions, optimizing drug loading efficiency, and tracking the biodistribution and clearance of GNPs in the body. Despite these hurdles, GNPs hold promising potential in the realm of infectious disease treatment. Ongoing research and innovation are essential to overcome these obstacles and completely harness the potential of GNPs in clinical applications.
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Affiliation(s)
- Osama A Madkhali
- Department of Pharmaceutics, College of Pharmacy, Jazan University, Jazan 45124, Saudi Arabia
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Chen Q, Auras R, Kirkensgaard JJK, Uysal-Unalan I. Modulating Barrier Properties of Stereocomplex Polylactide: The Polymorphism Mechanism and Its Relationship with Rigid Amorphous Fraction. ACS Appl Mater Interfaces 2023; 15:49678-49688. [PMID: 37832031 DOI: 10.1021/acsami.3c12602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
Abstract
The barrier properties of semicrystalline polymers are crucial for their performance and their use as packaging materials. This work uncovers the mechanism of polymorphism modification (α, α' and stereocomplex-crystals) and its combined effect on the oxygen and water vapor barrier properties of semicrystalline stereocomplex polylactide (SCPLA). A polymorphic selective filler-type nucleator was employed to eliminate the temperature effect on the development of polymorphism and rigid amorphous fraction (RAF), allowing correlations of barrier properties with different crystal forms and RAF combinations under the same amorphous composition (SCPLA). The oxygen and water vapor barrier performances strongly correlated with crystallinity and crystal form but were not monotonically related to the RAF quantity. The study proposes that the chain conformation of intermediate phases between the crystalline and amorphous phases differs with the associated crystal forms, thereby leading to different RAF "qualities" and contributing to different gas diffusion and solubility coefficients of the amorphous regions. RAF's per unit excess free volume may be varied with crystal forms, for instance: α' ≫ SC > α. Therefore, SCPLA with α' crystals exhibited high oxygen and water vapor permeabilities. Those with high SC and α crystals showed similar barrier behaviors governed by Henry's law dissolution and followed a linear "two-phase" relationship with total crystallinity.
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Affiliation(s)
- Qi Chen
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark
- CiFOOD - Center for Innovative Food Research, Aarhus University, Agro Food Park, 48, 8200 Aarhus N, Denmark
| | - Rafael Auras
- School of Packaging, Michigan State University, East Lansing, Michigan 48824-1223, United States
| | - Jacob Judas Kain Kirkensgaard
- Department of Food Science, University of Copenhagen, 1958 Frederiksberg C, Denmark
- Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø, Denmark
| | - Ilke Uysal-Unalan
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark
- CiFOOD - Center for Innovative Food Research, Aarhus University, Agro Food Park, 48, 8200 Aarhus N, Denmark
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11
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Kadoya R, Soga H, Matsuda M, Sato M, Taguchi S. Bacterial Population Changes during the Degradation Process of a Lactate (LA)-Enriched Biodegradable Polymer in River Water: LA-Cluster Preferable Bacterial Consortium. Polymers (Basel) 2023; 15:4111. [PMID: 37896354 PMCID: PMC10610160 DOI: 10.3390/polym15204111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/06/2023] [Accepted: 10/15/2023] [Indexed: 10/29/2023] Open
Abstract
The lactate-based polyester poly[lactate (LA)-co-3-hydroxybutyrate (3HB)], termed LAHB, is a highly transparent and flexible bio-based polymeric material. There are many unknowns regarding its degradation process in riverine environments, especially the changes in bacterial flora that might result from its degradation and the identities of any LAHB-degrading bacteria. LAHB were immersed in the river water samples (A and B), and LAHB degradation was observed in terms of the weight change of the polymer and the microscopic changes on the polymer surfaces. A metagenomic analysis of microorganisms was conducted to determine the effect of LAHB degradation on the aquatic environment. The bacterial flora obtained from beta diversity analysis differed between the two river samples. The river A water sample showed the simultaneous degradation of LA and 3HB even though the copolymer was LA-enriched, suggesting preferable hydrolysis of the LA-enriched segments. In contrast, only 3HB degraded for the LAHB in the river B water sample. The linear discriminant analysis effect size (LEfSe) analysis revealed 14 bacteria that were significantly increased in the river A water sample during LAHB degradation, suggesting that these bacteria preferentially degraded and assimilated LA-clustering polymers. Our metagenomic analysis provides useful insights into the dynamic changes in microbial communities and LA-clustering polymer-degrading bacteria.
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Affiliation(s)
- Ryosuke Kadoya
- Department of Food and Nutrition, School of Life Studies, Sugiyama Jogakuen University, 17-3 Hoshigaoka Motomachi, Chikusa-ku, Nagoya 464-8662, Aichi, Japan; (H.S.); (M.M.)
| | - Hitomi Soga
- Department of Food and Nutrition, School of Life Studies, Sugiyama Jogakuen University, 17-3 Hoshigaoka Motomachi, Chikusa-ku, Nagoya 464-8662, Aichi, Japan; (H.S.); (M.M.)
| | - Miki Matsuda
- Department of Food and Nutrition, School of Life Studies, Sugiyama Jogakuen University, 17-3 Hoshigaoka Motomachi, Chikusa-ku, Nagoya 464-8662, Aichi, Japan; (H.S.); (M.M.)
| | - Michio Sato
- Microbial Genetics Laboratory, Department of Agricultural Chemistry, Graduate School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawsaki 214-8571, Kanagawa, Japan;
| | - Seiichi Taguchi
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai-cho, Nada, Kobe 657-8501, Hyogo, Japan;
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12
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Zabihzadeh Khajavi M, Nikiforov A, Nilkar M, Devlieghere F, Ragaert P, De Geyter N. Degradable Plasma-Polymerized Poly(Ethylene Glycol)-Like Coating as a Matrix for Food-Packaging Applications. Nanomaterials (Basel) 2023; 13:2774. [PMID: 37887925 PMCID: PMC10609115 DOI: 10.3390/nano13202774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/28/2023]
Abstract
Currently, there is considerable interest in seeking an environmentally friendly technique that is neither thermally nor organic solvent-dependent for producing advanced polymer films for food-packaging applications. Among different approaches, plasma polymerization is a promising method that can deposit biodegradable coatings on top of polymer films. In this study, an atmospheric-pressure aerosol-assisted plasma deposition method was employed to develop a poly(ethylene glycol) (PEG)-like coating, which can act as a potential matrix for antimicrobial agents, by envisioning controlled-release food-packaging applications. Different plasma operating parameters, including the input power, monomer flow rate, and gap between the edge of the plasma head and substrate, were optimized to produce a PEG-like coating with a desirable water stability level and that can be biodegradable. The findings revealed that increased distance between the plasma head and substrate intensified gas-phase nucleation and diluted the active plasma species, which in turn led to the formation of a non-conformal rough coating. Conversely, at short plasma-substrate distances, smooth conformal coatings were obtained. Furthermore, at low input powers (<250 W), the chemical structure of the precursor was mostly preserved with a high retention of C-O functional groups due to limited monomer fragmentation. At the same time, these coatings exhibit low stability in water, which could be attributed to their low cross-linking degree. Increasing the power to 350 W resulted in the loss of the PEG-like chemical structure, which is due to the enhanced monomer fragmentation at high power. Nevertheless, owing to the enhanced cross-linking degree, these coatings were more stable in water. Finally, it could be concluded that a moderate input power (250-300 W) should be applied to obtain an acceptable tradeoff between the coating stability and PEG resemblance.
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Affiliation(s)
- Maryam Zabihzadeh Khajavi
- Research Unit Food Microbiology and Food Preservation, Department of Food Technology, Safety and Health, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (F.D.); (P.R.)
- Research Unit Plasma Technology, Department of Applied Physics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium; (A.N.); (M.N.); (N.D.G.)
| | - Anton Nikiforov
- Research Unit Plasma Technology, Department of Applied Physics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium; (A.N.); (M.N.); (N.D.G.)
| | - Maryam Nilkar
- Research Unit Plasma Technology, Department of Applied Physics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium; (A.N.); (M.N.); (N.D.G.)
| | - Frank Devlieghere
- Research Unit Food Microbiology and Food Preservation, Department of Food Technology, Safety and Health, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (F.D.); (P.R.)
| | - Peter Ragaert
- Research Unit Food Microbiology and Food Preservation, Department of Food Technology, Safety and Health, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (F.D.); (P.R.)
| | - Nathalie De Geyter
- Research Unit Plasma Technology, Department of Applied Physics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium; (A.N.); (M.N.); (N.D.G.)
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13
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Mankaev BN, Karlov SS. Metal Complexes in the Synthesis of Biodegradable Polymers: Achievements and Prospects. Materials (Basel) 2023; 16:6682. [PMID: 37895663 PMCID: PMC10608263 DOI: 10.3390/ma16206682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/05/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023]
Abstract
This review describes recent advances in the synthesis of homopolymers of lactide and related cyclic esters via ring-opening polymerization (ROP) in the presence of metal complexes based on group 1, 2, 4, 12, 13 and 14 metals. Particular attention is paid to the influence of the initiator structure on the properties of the obtaining homo- and copolymers. Also, a separate chapter is devoted to the study of metal complexes in the synthesis of copolymers of lactide and lactones. This review highlights the efforts made over the last ten years or so, and shows how main-group metals have received increasing attention in the field of the polymerization of lactide and related cyclic esters.
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Affiliation(s)
- Badma N. Mankaev
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia;
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, 119991 Moscow, Russia
| | - Sergey S. Karlov
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia;
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, 119991 Moscow, Russia
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14
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Carvalho BO, Gonçalves LPC, Mendonça PV, Pereira JP, Serra AC, Coelho JFJ. Replacing Harmful Flame Retardants with Biodegradable Starch-Based Materials in Polyethylene Formulations. Polymers (Basel) 2023; 15:4078. [PMID: 37896321 PMCID: PMC10610673 DOI: 10.3390/polym15204078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/19/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
The addition of toxic flame retardants to commercially available polymers is often required for safety reasons due to the high flammability of these materials. In this work, the preparation and incorporation of efficient biodegradable starch-based flame retardants into a low-density polyethylene (LDPE) matrix was investigated. Thermoplastic starch was first obtained by plasticizing starch with glycerol/water or glycerol/water/choline phytate to obtain TPS-G and TPS-G-CPA, respectively. Various LDPE/TPS blends were prepared by means of melt blending using polyethylene graft maleic anhydride as a compatibilizer and by varying the content of TPS and a halogenated commercial flame retardant. By replacing 38% and 76% of the harmful commercial flame retardant with safe TPS-G-CPA and TPS-G, respectively, blends with promising fire behavior were obtained, while the limiting oxygen index (LOI ≈ 28%) remained the same. The presence of choline phytate improved both the charring ability and fire retardancy of starch and resulted in a 43% reduction in fire growth index compared to the blend with commercial flame retardant only, as confirmed by means of cone calorimetry. Standard UL 94 vertical tests showed that blends containing TPS exhibited dripping behavior (rated V2), while those with commercial flame retardant were rated V0. Overall, this work demonstrates the potential of starch as a natural flame retardant that could reduce the cost and increase the safety of polymer-based materials.
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Affiliation(s)
- Bárbara O. Carvalho
- Centre for Mechanical Engineering, Materials, and Processes, Advanced Production and Intelligent Systems (ARISE), Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Polo II, 3030-790 Coimbra, Portugal
| | - Luís P. C. Gonçalves
- Centre for Mechanical Engineering, Materials, and Processes, Advanced Production and Intelligent Systems (ARISE), Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Polo II, 3030-790 Coimbra, Portugal
| | - Patrícia V. Mendonça
- Centre for Mechanical Engineering, Materials, and Processes, Advanced Production and Intelligent Systems (ARISE), Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Polo II, 3030-790 Coimbra, Portugal
| | - João P. Pereira
- Componit Lda, Estr. Real 3, 2070-621 Vila Chã de Ourique, Portugal
| | - Arménio C. Serra
- Centre for Mechanical Engineering, Materials, and Processes, Advanced Production and Intelligent Systems (ARISE), Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Polo II, 3030-790 Coimbra, Portugal
| | - Jorge F. J. Coelho
- Centre for Mechanical Engineering, Materials, and Processes, Advanced Production and Intelligent Systems (ARISE), Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Polo II, 3030-790 Coimbra, Portugal
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15
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Yu W, Hu Z, Zhang Y, Zhang Y, Dong W, Li X, Wang S. Compatibilizing Biodegradable Poly(lactic acid)/polybutylene adipate-co-terephthalate Blends via Reactive Graphene Oxide for Screw-Based 3D Printing. Polymers (Basel) 2023; 15:3992. [PMID: 37836041 PMCID: PMC10575447 DOI: 10.3390/polym15193992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/01/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
Vinyl-functionalized graphene oxide (VGO) was used as a reactive compatibilizer to prepare poly(lactic acid)/polybutylene adipate-co-terephthalate (PLA/PBAT) blends. The linear rheological and scanning electron microscopy results confirmed that the VGO nanosheets were quite efficient in compatibilizing PLA/PBAT blends. The size of the PBAT dispersed phase was remarkably decreased in the presence of VGO nanosheets. Moreover, the VGO nanosheets exhibited strong nucleating effects on the crystallization process of PLA. The crystallinity of PLA component in the compatibilized blend with various VGO nanosheets was higher than 40%, upon the cooling rate of 20 °C/min. The prepared PLA/PBAT pellets were applied to 3D printing, using a self-developed screw-based 3D printer. The results showed that all the prepared PLA/PBAT blend pellets can be 3D printed successfully. The notched Izod impact test results showed that, in the presence of VGO, an increase of at least 142% in impact strength was achieved for PLA/PBAT blend. This could be attributed to the compatibilizing effect of the VGO nanosheets. Thus, this work provides a novel way to prepare tough PLA-based materials for 3D printing.
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Affiliation(s)
- Wei Yu
- College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua 321004, China;
| | - Zhonglue Hu
- Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China; (Z.H.); (W.D.); (X.L.)
| | - Ye Zhang
- Beijing Aeronautical Science & Technology Research Institute (BASTRI), Commercial Aircraft Corporation of China, Shanghai 200126, China;
| | - Yakuang Zhang
- Aerospace and Astronautics Propulsion Research Institute, 20 Shidai Road, Haining 314400, China;
| | - Weiping Dong
- Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China; (Z.H.); (W.D.); (X.L.)
| | - Xiping Li
- Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China; (Z.H.); (W.D.); (X.L.)
| | - Sisi Wang
- Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China; (Z.H.); (W.D.); (X.L.)
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16
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Xiang Z, Zhang J, Zhou C, Zhang B, Chen N, Li M, Fu D, Wang Y. Near-Infrared Remotely Controllable Shape Memory Biodegradable Occluder Based on Poly(l-lactide- co-ε-caprolactone)/Gold Nanorod Composite. ACS Appl Mater Interfaces 2023; 15:42341-42353. [PMID: 37647023 DOI: 10.1021/acsami.3c09852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Biodegradable occluders, which can efficiently eliminate the complications caused by permanent foreign implants, are considered to be the next-generation devices for the interventional treatment of congenital heart disease. However, the controllability of the deployment process of degradable occluders remains a challenge. In this work, a near-infrared (NIR) remotely controllable biodegradable occluder is explored by integrating poly(l-lactide-co-ε-caprolactone) (PLCL) with poly(ethylene glycol)-modified gold nanorods (GNR/PEG). The caprolactone structural units can effectively increase the toughness of poly(l-lactide) and reduce the shape-memory transition temperature of the occluder to a more tissue-friendly temperature. Gold nanorods endow the PLCL-GNR/PEG composite with an excellent photothermal effect. The obtained occluder can be easily loaded into a catheter for transport and spatiotemporally expanded under irradiation with near-infrared light to block the defect site. Both in vitro and in vivo biological experiments showed that PLCL-GNR/PEG composites have good biocompatibility, and the PEGylated gold nanorods could improve the hemocompatibility of the composites to a certain extent by enhancing their hydrophilicity. As a thermoplastic shape-memory polymer, PLCL-GNR/PEG can be easily processed into various forms and structures for different patients and lesions. Therefore, PLCL-GNR/PEG has the potential to be considered as a competitive biodegradable material not only for occluders but also for other biodegradable implants.
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Affiliation(s)
- Zhen Xiang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Jiayi Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Chen Zhou
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Bo Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Nuoya Chen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Mingyu Li
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Daihua Fu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
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17
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Mapossa AB, da Silva Júnior AH, de Oliveira CRS, Mhike W. Thermal, Morphological and Mechanical Properties of Multifunctional Composites Based on Biodegradable Polymers/Bentonite Clay: A Review. Polymers (Basel) 2023; 15:3443. [PMID: 37631500 PMCID: PMC10458906 DOI: 10.3390/polym15163443] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/07/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
The extensive use of non-biodegradable plastic products has resulted in significant environmental problems caused by their accumulation in landfills and their proliferation into water bodies. Biodegradable polymers offer a potential solution to mitigate these issues through the utilization of renewable resources which are abundantly available and biodegradable, making them environmentally friendly. However, biodegradable polymers face challenges such as relatively low mechanical strength and thermal resistance, relatively inferior gas barrier properties, low processability, and economic viability. To overcome these limitations, researchers are investigating the incorporation of nanofillers, specifically bentonite clay, into biodegradable polymeric matrices. Bentonite clay is an aluminum phyllosilicate with interesting properties such as a high cation exchange capacity, a large surface area, and environmental compatibility. However, achieving complete dispersion of nanoclays in polymeric matrices remains a challenge due to these materials' hydrophilic and hydrophobic nature. Several methods are employed to prepare polymer-clay nanocomposites, including solution casting, melt extrusion, spraying, inkjet printing, and electrospinning. Biodegradable polymeric nanocomposites are versatile and promising in various industrial applications such as electromagnetic shielding, energy storage, electronics, and flexible electronics. Additionally, combining bentonite clay with other fillers such as graphene can significantly reduce production costs compared to the exclusive use of carbon nanotubes or metallic fillers in the matrix. This work reviews the development of bentonite clay-based composites with biodegradable polymers for multifunctional applications. The composition, structure, preparation methods, and characterization techniques of these nanocomposites are discussed, along with the challenges and future directions in this field.
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Affiliation(s)
- António Benjamim Mapossa
- Department of Chemical Engineering, University of Pretoria, Lynnwood Road, Pretoria 0002, South Africa
| | - Afonso Henrique da Silva Júnior
- Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Florianópolis 88037-000, SC, Brazil
| | | | - Washington Mhike
- Polymer Technology Division, Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria 0183, South Africa
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18
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Im D, Gavande V, Lee HY, Lee WK. Influence of Molecular Weight on the Enzymatic Degradation of PLA Isomer Blends by a Langmuir System. Materials (Basel) 2023; 16:5087. [PMID: 37512361 PMCID: PMC10385088 DOI: 10.3390/ma16145087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/08/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023]
Abstract
Polylactides (PLAs) and lactide copolymers are biodegradable, compostable, and derived from renewable resources, offering a sustainable alternative to petroleum-based synthetic polymers owing to their advantages of comparable mechanical properties with commodity plastics and biodegradability. Their hydrolytic stability and thermal properties can affect their potential for long-lasting applications. However, stereocomplex crystallization is a robust method between isomer PLAs that allows significant amelioration in copolymer properties, such as thermal stability, mechanical properties, and biocompatibility, through substantial intermolecular interactions amid l-lactyl and d-lactyl sequences, which have been the key approach to initial degradation rate and further PLA applications. It was demonstrated that the essential parameters affecting stereocomplexation are the mixing ratio and the chain length of each unit sequence. This study deals with the molecular weight, one of the specific interactions between isomers of PLAs. A solution polymerization method was applied to control molecular weight and chain architecture. The stereocomplexation was monitored with DSC. It was confirmed that the lower molecular weight polymer showed a higher degradation rate, as a hydrolyzed fragment having a molecular weight below a certain length dissolves into the water. To systematically explore the critical contribution of molecular weights, the Langmuir system was used to observe the stereocomplexation effect and the overall degradation rate.
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Affiliation(s)
- Donghyeok Im
- Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea
- Fine & Specialty Chemical Research Group, Korea Institute of Footwear & Leather Technology, Busan 47154, Republic of Korea
| | - Vishal Gavande
- Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Hak Yong Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology, Ulsan 44429, Republic of Korea
| | - Won-Ki Lee
- Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea
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19
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Yang Z, Lou Y, Pan H, Wang H, Yang Q, Sun Y, Zhuge Y. Reinforced Bioremediation of Excessive Nitrate in Atrazine-Contaminated Soil by Biodegradable Composite Carbon Source. Polymers (Basel) 2023; 15:2765. [PMID: 37447411 DOI: 10.3390/polym15132765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/10/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
Bioremediation is a good alternative to dispose of the excessive nitrate (NO3-) in soil and alleviate the secondary salinization of soil, but the presence of atrazine in soil interferes with the bioremediation process. In the present study, the biodegradable composite carbon source with different dosages was added to the atrazine-contaminated soil to intensify the bioremediation of excessive NO3-. The atrazine-contaminated soil with a 25 g/kg composite carbon source achieved the optimal NO3- removal performance (92.10%), which was slightly higher than that with a 5 g/kg composite carbon source (86.15%) (p > 0.05). Unfortunately, the negative effects of the former were observed, such as the distinctly higher emissions of N2O, CO2 and a more powerful global warming potential (GWP). Microbial community analysis showed that the usage of the composite carbon source clearly decreased the richness and diversity of the microbial community, and greatly stimulated nitrogen metabolism and atrazine degradation (p < 0.05). To sum up, the application of a 5 g/kg composite carbon source contributed to guaranteeing bioremediation performance and reducing adverse environmental impacts at the same time.
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Affiliation(s)
- Zhongchen Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Yanhong Lou
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Hong Pan
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Hui Wang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Quangang Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Yajie Sun
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Yuping Zhuge
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
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20
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Ferri M, Papchenko K, Degli Esposti M, Tondi G, De Angelis MG, Morselli D, Fabbri P. Fully Biobased Polyhydroxyalkanoate/Tannin Films as Multifunctional Materials for Smart Food Packaging Applications. ACS Appl Mater Interfaces 2023. [PMID: 37265075 DOI: 10.1021/acsami.3c04611] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fully biobased and biodegradable materials have attracted a growing interest in the food packaging sector as they can help to reduce the negative impact of fossil-based plastics on the environment. Moreover, the addition of functionalities to these materials by introducing active molecules has become an essential requirement to create modern packaging able to extend food's shelf-life while informing the consumer about food quality and freshness. In this study, we present an innovative bioplastic formulation for food packaging based on poly(hydroxybutyrate-co-valerate) (PHBV) and tannins as multifunctional additives. As a proof of concept, PHBV/tannin films were prepared by solvent casting, increasing the tannin content from 1 to 10 per hundred of resin (phr). Formic acid was used to reach a homogeneous distribution of the hydrophilic tannins into hydrophobic PHBV, which is remarkably challenging by using other solvents. Thanks to their well-known properties, the effect of tannins on the antioxidant, UV protection, and gas barrier properties of PHBV was evaluated. Samples containing 5 phr bioadditive revealed the best combination of these properties, also maintaining good transparency. Differential scanning calorimetry (DSC) investigations revealed that films are suitable for application from the fridge to potentially high temperatures for food heating (up to 200 °C). Tensile tests have also shown that Young's modulus (900-1030 MPa) and tensile strength (20 MPa) are comparable with those of the common polymers and biopolymers for packaging. Besides the improvement of the PHBV properties for extending food's shelf-life, it was also observed that PHBV/tannin could colorimetrically detect ammonia vapors, thus making this material potentially applicable as a smart indicator for food spoilage (e.g., detection of fish degradation). The presented outcomes suggest that tannins can add multifunctional properties to a polymeric material, opening up a new strategy to obtain an attractive alternative to petroleum-based plastics for smart food packaging applications.
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Affiliation(s)
- Martina Ferri
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Kseniya Papchenko
- Institute for Materials and Processes, School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, EH9 3FB Edinburgh, U.K
| | - Micaela Degli Esposti
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Gianluca Tondi
- Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padua, Legnaro, Viale dell'Università 16, 35020 Legnaro, Italy
| | - Maria Grazia De Angelis
- Institute for Materials and Processes, School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, EH9 3FB Edinburgh, U.K
| | - Davide Morselli
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via Giusti 9, 50121 Firenze, Italy
| | - Paola Fabbri
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Via Terracini 28, 40131 Bologna, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via Giusti 9, 50121 Firenze, Italy
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21
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Tsunoi Y, Takayama I, Kondo N, Nagano Y, Miyazaki H, Kawauchi S, Akashi M, Saitoh D, Terakawa M, Sato S. Cultivation and Transplantation of Three-Dimensional Skins with Laser-Processed Biodegradable Membranes. Tissue Eng Part A 2023; 29:344-353. [PMID: 37053095 DOI: 10.1089/ten.tea.2022.0208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023] Open
Abstract
For the treatment of irreversible, extensive skin damage, artificial skins or cultured skins are useful when allogeneic skins are unavailable. However, most of them lack vasculature, causing delayed perfusion and hence delay or failure in engraftment of the tissues. We previously developed a prevascularized three-dimensional (3D) cultured skin based on the layer-by-layer cell coating technique (LbL-3D skin), in which cells are seeded and laminated on a porous polymer membrane for medium supply to the thick cultured tissue. Recent animal studies have demonstrated that LbL-3D skin can achieve rapid perfusion and high graft survival after transplantation. However, there were practical issues with separating LbL-3D skins from the membranes before transplantation and the handling separated LbL-3D skins for transplantation. To address these problems, in this study, we examined the use of biodegradable porous polymer membranes that enabled the transplantation of LbL-3D skins together with the membranes, which could be decomposed after transplantation. Thin films made from poly (lactic-co-glycolic acid) (PLGA) were irradiated with femtosecond laser pulses to create micro through-holes, producing porous membranes. We designed and fabricated culture inserts with the PLGA membranes and cultivated LbL-3D skins with 2 × 106 neonatal normal human dermal fibroblasts and 1 × 104 human umbilical vein endothelial cells in the dermis of 20 cell layers and 1 × 105 neonatal human epidermal keratinocytes in the epidermis. Histological analyses revealed that the skins cultured on the PLGA membranes had thickness of about 400 μm and that there were no defects in the quality of the skins cultured on the PLGA membranes when compared with those cultured on the conventional (nonbiodegradable) commercial membranes. The cultured LbL-3D skins were then transplanted together with the PLGA membranes onto full-thickness excisional wounds in mice. At 7 days posttransplantation onto a mouse, the tissues above and below the membrane were connected through the holes with collagen-positive fibers that appeared to migrate from both the host and donor sides, and favorable reepithelization was observed throughout the transplanted skin region. However, insufficient engraftment was observed in some cases. Thus, further optimization of the membrane conditions would be needed to improve the transplantation outcome.
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Affiliation(s)
- Yasuyuki Tsunoi
- Division of Bioinformation and Therapeutic Systems, National Defense Medical College Research Institute, Tokorozawa, Japan
| | - Izumi Takayama
- Center for Electronics and Electrical Engineering, School of Integrated Design Engineering, Keio University, Yokohama, Japan
| | - Naonari Kondo
- Center for Electronics and Electrical Engineering, School of Integrated Design Engineering, Keio University, Yokohama, Japan
| | - Yo Nagano
- Center for Electronics and Electrical Engineering, School of Integrated Design Engineering, Keio University, Yokohama, Japan
| | - Hiromi Miyazaki
- Division of Biomedical Engineering, National Defense Medical College Research Institute, Tokorozawa, Japan
| | - Satoko Kawauchi
- Division of Bioinformation and Therapeutic Systems, National Defense Medical College Research Institute, Tokorozawa, Japan
| | - Mitsuru Akashi
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan
| | - Daizoh Saitoh
- Division of Basic Traumatology, National Defense Medical College Research Institute, Tokorozawa, Japan
| | - Mitsuhiro Terakawa
- Center for Electronics and Electrical Engineering, School of Integrated Design Engineering, Keio University, Yokohama, Japan
- Department of Electronics and Electrical Engineering, Keio University, Yokohama, Japan
| | - Shunichi Sato
- Division of Bioinformation and Therapeutic Systems, National Defense Medical College Research Institute, Tokorozawa, Japan
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22
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Lam ILJ, Mohd Affandy MA, 'Aqilah NMN, Vonnie JM, Felicia WXL, Rovina K. Physicochemical Characterization and Antimicrobial Analysis of Vegetal Chitosan Extracted from Distinct Forest Fungi Species. Polymers (Basel) 2023; 15:polym15102328. [PMID: 37242902 DOI: 10.3390/polym15102328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 05/28/2023] Open
Abstract
The main goal of this investigation is to conduct a thorough analysis of the physical, chemical, and morphological characteristics of chitosan derived from various forest fungi. Additionally, the study aims to determine the effectiveness of this vegetal chitosan as an antimicrobial agent. In this study, Auricularia auricula-judae, Hericium erinaceus, Pleurotus ostreatus, Tremella fuciformis, and Lentinula edodes were examined. The fungi samples were subjected to a series of rigorous chemical extraction procedures, including demineralization, deproteinization, discoloration, and deacetylation. Subsequently, the chitosan samples were subjected to a comprehensive physicochemical characterization analysis, encompassing Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), degree of deacetylation determination, ash content determination, moisture content determination, and solubility determination. To evaluate the antimicrobial efficacy of the vegetal chitosan samples, two different sampling parameters were employed, namely human hand and banana, to assess their effectiveness in inhibiting microbial growth. Notably, the percentage of chitin and chitosan varied significantly among the distinct fungal species examined. Moreover, EDX spectroscopy confirmed the extraction of chitosan from H. erinaceus, L. edodes, P. ostreatus, and T. fuciformis. The FTIR spectra of all samples revealed a similar absorbance pattern, albeit with varying peak intensities. Furthermore, the XRD patterns for each sample were nearly identical, with the exception of the A. auricula-judae sample, which exhibited sharp peaks at ~37° and ~51°, while the crystallinity index of this same sample was approximately 17% lower than the others. The moisture content results indicated that the L. edodes sample was the least stable, while the P. ostreatus sample was the most stable, in terms of degradation rate. Similarly, the solubility of the samples showed substantial variation among each species, with the H. erinaceus sample displaying the highest solubility among the rest. Lastly, the antimicrobial activity of the chitosan solutions exhibited different efficacies in inhibiting microbial growth of skin microflora and microbes found on the peel of Musa acuminata × balbisiana.
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Affiliation(s)
- Iversen Luk Jun Lam
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | | | - Nasir Md Nur 'Aqilah
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | - Joseph Merillyn Vonnie
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | - Wen Xia Ling Felicia
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | - Kobun Rovina
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
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23
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Antonova LV, Sevostianova VV, Silnikov VN, Krivkina EO, Velikanova EA, Mironov AV, Shabaev AR, Senokosova EA, Khanova MY, Glushkova TV, Akentieva TN, Sinitskaya AV, Markova VE, Shishkova DK, Lobov AA, Repkin EA, Stepanov AD, Kutikhin AG, Barbarash LS. Comparison of the Patency and Regenerative Potential of Biodegradable Vascular Prostheses of Different Polymer Compositions in an Ovine Model. Int J Mol Sci 2023; 24:ijms24108540. [PMID: 37239889 DOI: 10.3390/ijms24108540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
The lack of suitable autologous grafts and the impossibility of using synthetic prostheses for small artery reconstruction make it necessary to develop alternative efficient vascular grafts. In this study, we fabricated an electrospun biodegradable poly(ε-caprolactone) (PCL) prosthesis and poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/poly(ε-caprolactone) (PHBV/PCL) prosthesis loaded with iloprost (a prostacyclin analog) as an antithrombotic drug and cationic amphiphile with antibacterial activity. The prostheses were characterized in terms of their drug release, mechanical properties, and hemocompatibility. We then compared the long-term patency and remodeling features of PCL and PHBV/PCL prostheses in a sheep carotid artery interposition model. The research findings verified that the drug coating of both types of prostheses improved their hemocompatibility and tensile strength. The 6-month primary patency of the PCL/Ilo/A prostheses was 50%, while all PHBV/PCL/Ilo/A implants were occluded at the same time point. The PCL/Ilo/A prostheses were completely endothelialized, in contrast to the PHBV/PCL/Ilo/A conduits, which had no endothelial cells on the inner layer. The polymeric material of both prostheses degraded and was replaced with neotissue containing smooth-muscle cells; macrophages; proteins of the extracellular matrix such as type I, III, and IV collagens; and vasa vasorum. Thus, the biodegradable PCL/Ilo/A prostheses demonstrate better regenerative potential than PHBV/PCL-based implants and are more suitable for clinical use.
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Affiliation(s)
- Larisa V Antonova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Viktoriia V Sevostianova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Vladimir N Silnikov
- Laboratory of Organic Synthesis, Institute of Chemical Biology and Fundamental Medicine of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Evgeniya O Krivkina
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Elena A Velikanova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Andrey V Mironov
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Amin R Shabaev
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Evgenia A Senokosova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Mariam Yu Khanova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Tatiana V Glushkova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Tatiana N Akentieva
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Anna V Sinitskaya
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Victoria E Markova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Daria K Shishkova
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Arseniy A Lobov
- Department of Regenerative Biomedicine, Research Institute of Cytology, 4 Tikhoretskiy Prospekt, St. Petersburg 194064, Russia
| | - Egor A Repkin
- Centre for Molecular and Cell Technologies, St. Petersburg State University, Universitetskaya Embankment, 7/9, St. Petersburg 199034, Russia
| | - Alexander D Stepanov
- Institute of Medicine, Kemerovo State University, 6 Krasnaya Street, Kemerovo 650000, Russia
| | - Anton G Kutikhin
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
| | - Leonid S Barbarash
- Department of Experimental Medicine, Research Institute for Complex Issues of Cardiovascular Diseases, 6 Sosnovy Boulevard, Kemerovo 650002, Russia
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Xiang Y, Liu Y, Gong M, Tong Y, Liu Y, Zhao G, Yang J. Preparation of Novel Biodegradable Polymer Slow-Release Fertilizers to Improve Nutrient Release Performance and Soil Phosphorus Availability. Polymers (Basel) 2023; 15:polym15102242. [PMID: 37242815 DOI: 10.3390/polym15102242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/06/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Inspired by the gradual collapse of carbon chain and the gradual release of organic elements into the external environment during the degradation of biodegradable polymers, a novel biodegradable polymer slow-release fertilizer containing nutrient nitrogen and phosphorus (PSNP) was prepared in this study. PSNP contains phosphate fragment and urea formaldehyde (UF) fragment, which are prepared by solution condensation reaction. Under the optimal process, the nitrogen (N) and P2O5 contents of PSNP were 22% and 20%, respectively. The expected molecular structure of PSNP was confirmed by SEM, FTIR, XRD, and TG. PSNP can release N and phosphorus (P) nutrients slowly under the action of microorganisms, and the cumulative release rates of N and P in 1 month were only 34.23% and 36.91%, respectively. More importantly, through soil incubation experiment and leaching experiment, it was found that UF fragments released in the degradation process of PSNP can strongly complex soil high-valence metal ions, thus inhibiting the phosphorus nutrient released by degradation to be fixed in the soil and ultimately effectively increasing the soil available P content. Compared with ammonium dihydrogen phosphate (ADP), a small molecule phosphate fertilizer that is easily soluble, the available P content of PSNP in the 20-30 cm soil layer is almost twice that of ADP. Our study provides a simple copolymerization method to prepare PSNP with excellent slow-release N and P nutrients, which can promote the development of sustainable agriculture.
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Affiliation(s)
- Yang Xiang
- Shanxi Province Key Laboratory of Functional Nanocomposites, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
- Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan 030051, China
| | - Yaqing Liu
- Shanxi Province Key Laboratory of Functional Nanocomposites, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
- Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan 030051, China
| | - Mingshan Gong
- Shanxi Province Key Laboratory of Functional Nanocomposites, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
- Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan 030051, China
| | - Yingfang Tong
- Shanxi Province Key Laboratory of Functional Nanocomposites, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
- Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan 030051, China
| | - Yuhan Liu
- Shanxi Province Key Laboratory of Functional Nanocomposites, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
- Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan 030051, China
| | - Guizhe Zhao
- Shanxi Province Key Laboratory of Functional Nanocomposites, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
- Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan 030051, China
| | - Jianming Yang
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan 243032, China
- State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200438, China
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25
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Harris E. Industry update, December 2022. Ther Deliv 2023; 14:87-92. [PMID: 37040144 DOI: 10.4155/tde-2023-0016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023] Open
Affiliation(s)
- Elaine Harris
- School of Chemical & Pharmaceutical Science, Technological University Dublin, Ireland
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26
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Lee YF, Wu TM. Investigation on the Photodegradation Stability of Acrylic Acid-Grafted Poly(butylene carbonate-co-terephthalate)/Organically Modified Layered Zinc Phenylphosphonate Composites. Polymers (Basel) 2023; 15:polym15051276. [PMID: 36904517 PMCID: PMC10007439 DOI: 10.3390/polym15051276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/17/2023] [Accepted: 02/23/2023] [Indexed: 03/06/2023] Open
Abstract
The application efficiency of biodegradable polymers used in a natural environment requires improved resistance to ultraviolet (UV) photodegradation. In this report, 1,6-hexanediamine modified layered zinc phenylphosphonate (m-PPZn), utilized as a UV protection additive for acrylic acid-grafted poly(butylene carbonate-co-terephthalate) (g-PBCT), was successfully fabricated and compared to the solution mixing process. Experimental data of both wide-angle X-ray diffraction and transmission electron microscopy reveal that the g-PBCT polymer matrix was intercalated into the interlayer spacing of m-PPZn, which was approximately delaminated in the composite materials. The evolution of photodegradation behavior for g-PBCT/m-PPZn composites was identified using Fourier transform infrared spectroscopy and gel permeation chromatography after being artificially irradiated by a light source. The change of carboxyl group produced via photodegradation was used to show the enhanced UV protection ability of m-PPZn in the composite materials. All results indicate that the carbonyl index of the g-PBCT/m-PPZn composite materials after photodegradation for 4 weeks was extensively lower than that of the pure g-PBCT polymer matrix. These findings were also supported by the decrease in the molecular weight of g-PBCT after photodegradation for 4 weeks, from 20.76% to 8.21%, with the loading of 5 wt% m-PPZn content. Both observations were probably owing to the better UV reflection ability of m-PPZn. This investigation shows, through typical methodology, a significant advantage of fabricating the photodegradation stabilizer to enhance the UV photodegradation behavior of the biodegradable polymer using an m-PPZn compared to other UV stabilizer particles or additives.
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27
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Iglesias JF, Muller O, Losdat S, Roffi M, Kurz DJ, Weilenmann D, Kaiser C, Heg D, Windecker S, Pilgrim T. Complex primary percutaneous coronary intervention with ultrathin-strut biodegradable versus thin-strut durable polymer drug-eluting stents in patients with ST-segment elevation myocardial infarction: A subgroup analysis from the BIOSTEMI randomized trial. Catheter Cardiovasc Interv 2023; 101:687-700. [PMID: 36807456 DOI: 10.1002/ccd.30600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/22/2023] [Accepted: 02/08/2023] [Indexed: 02/21/2023]
Abstract
BACKGROUND Ultrathin-strut biodegradable polymer sirolimus-eluting stents (BP-SES) are superior to thin-strut durable polymer everolimus-eluting stents (DP-EES) with respect to target lesion failure (TLF) at 2 years among patients with ST-segment elevation myocardial infarction (STEMI). We sought to determine the impact of primary percutaneous coronary intervention (pPCI) complexity on long-term clinical outcomes with BP-SES versus DP-EES in STEMI patients. METHODS We performed a post hoc subgroup analysis from the BIOSTEMI (NCT02579031) randomized trial, which included individual data from 407 STEMI patients enrolled in the BIOSCIENCE trial (NCT01443104). STEMI patients were randomly assigned to treatment with ultrathin-strut BP-SES or thin-strut DP-EES, and further categorized into those undergoing complex versus noncomplex pPCI. Complex pPCI was defined by the presence of ≥1 of the following criteria: 3 vessel treatment, ≥3 stents implanted, ≥3 lesions treated, bifurcation lesion with ≥2 stents implanted, total stent length ≥60 mm, and/or chronic total occlusion treatment. The primary endpoint was TLF, a composite of cardiac death, target-vessel myocardial reinfarction, or clinically indicated target lesion revascularization, within 2 years. RESULTS Among a total of 1707 STEMI patients, 421 (24.7%) underwent complex pPCI. Baseline characteristics were similar between groups. At 2 years, TLF occurred in 14 patients (7.1%) treated with BP-SES and 25 patients (11.6%) treated with DP-EES (hazard ratio [HR]: 0.62; 95% confidence interval [CI]: 0.32-1.19; p = 0.15) in the complex pPCI group, and in 28 patients (4.4%) treated with BP-SES and 49 patients (8.2%) treated with DP-EES (HR: 0.54; 95% CI: 0.34-0.86; p = 0.008; p for interaction = 0.74) in the noncomplex pPCI group. Individual TLF components and stent thrombosis rates did not significantly differ between groups. CONCLUSION In a post hoc subgroup analysis from the BIOSTEMI randomized trial, ultrathin-strut BP-SES were superior to thin-strut DP-EES with respect to TLF at 2 years among STEMI patients undergoing both complex and noncomplex pPCI.
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Affiliation(s)
- Juan F Iglesias
- Department of Cardiology, Geneva University Hospitals, Geneva, Switzerland
| | - Olivier Muller
- Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | | | - Marco Roffi
- Department of Cardiology, Geneva University Hospitals, Geneva, Switzerland
| | - David J Kurz
- Department of Cardiology, Triemlispital, Zurich, Switzerland
| | | | - Christoph Kaiser
- Department of Cardiology, Basel University Hospital, Basel, Switzerland
| | - Dik Heg
- CTU Bern, University of Bern, Bern, Switzerland
| | - Stephan Windecker
- Department of Cardiology, Bern University Hospital, Bern, Switzerland
| | - Thomas Pilgrim
- Department of Cardiology, Bern University Hospital, Bern, Switzerland
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28
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Issabayeva Z, Shishkovsky I. Prediction of The Mechanical Behavior of Polylactic Acid Parts with Shape Memory Effect Fabricated by FDM. Polymers (Basel) 2023; 15. [PMID: 36904401 DOI: 10.3390/polym15051162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/19/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
In this study, the mechanical as well as thermomechanical behaviors of shape memory PLA parts are presented. A total of 120 sets with five variable printing parameters were printed by the FDM method. The impact of the printing parameters on the tensile strength, viscoelastic performance, shape fixity, and recovery coefficients were studied. The results show that two printing parameters, the temperature of the extruder and the nozzle diameter, were more significant for the mechanical properties. The values of tensile strength varied from 32 MPa to 50 MPa. The use of a suitable Mooney-Rivlin model to describe the hyperelastic behavior of the material allowed us to gain a good fit for the experimental and simulation curves. For the first time, using this material and method of 3D printing, the thermomechanical analysis (TMA) allowed us to evaluate the thermal deformation of the sample and obtain values of the coefficient of thermal expansion (CTE) at different temperatures, directions, and running curves from 71.37 ppm/K to 276.53 ppm/K. Dynamic mechanical analysis (DMA) showed a similar characteristic of curves and similar values with a deviation of 1-2% despite different printing parameters. The glass transition temperature for all samples with different measurement curves ranged from 63-69 °C. A material crystallinity of 2.2%, considered by differential scanning calorimetry (DSC), confirmed its amorphous nature. From the SMP cycle test, we observed that the stronger the sample, the lower the fatigue from cycle to cycle observed when restoring the initial shape after deformation, while the fixation of the shape did not almost decrease with each SMP cycle and was close to 100%. Comprehensive study demonstrated a complex operational relationship between determined mechanical and thermomechanical properties, combining the characteristics of a thermoplastic material with the shape memory effect and FDM printing parameters.
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29
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Sharma D, Srivastava S, Kumar S, Sharma PK, Hassani R, Dailah HG, Khalid A, Mohan S. Biodegradable Electrospun Scaffolds as an Emerging Tool for Skin Wound Regeneration: A Comprehensive Review. Pharmaceuticals (Basel) 2023; 16:325. [PMID: 37259465 PMCID: PMC9965065 DOI: 10.3390/ph16020325] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 12/25/2023] Open
Abstract
Skin is designed to protect various tissues, and because it is the largest and first human bodily organ to sustain damage, it has an incredible ability to regenerate. On account of extreme injuries or extensive surface loss, the normal injury recuperating interaction might be inadequate or deficient, bringing about risky and disagreeable circumstances that request the utilization of fixed adjuvants and tissue substitutes. Due to their remarkable biocompatibility, biodegradability, and bioactive abilities, such as antibacterial, immunomodulatory, cell proliferative, and wound mending properties, biodegradable polymers, both synthetic and natural, are experiencing remarkable progress. Furthermore, the ability to convert these polymers into submicrometric filaments has further enhanced their potential (e.g., by means of electrospinning) to impersonate the stringy extracellular grid and permit neo-tissue creation, which is a basic component for delivering a mending milieu. Together with natural biomaterial, synthetic polymers are used to solve stability problems and make scaffolds that can dramatically improve wound healing. Biodegradable polymers, commonly referred to as biopolymers, are increasingly used in other industrial sectors to reduce the environmental impact of material and energy usage as they are fabricated using renewable biological sources. Electrospinning is one of the best ways to fabricate nanofibers and membranes that are very thin and one of the best ways to fabricate continuous nanomaterials with a wide range of biological, chemical, and physical properties. This review paper concludes with a summary of the electrospinning (applied electric field, needle-to-collector distance, and flow rate), solution (solvent, polymer concentration, viscosity, and solution conductivity), and environmental (humidity and temperature) factors that affect the production of nanofibers and the use of bio-based natural and synthetic electrospun scaffolds in wound healing.
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Affiliation(s)
- Deepika Sharma
- Department of Pharmacy, School of Medical and Allied Sciences, Galgotias University, Greater Noida 203201, India
| | - Shriyansh Srivastava
- Department of Pharmacy, School of Medical and Allied Sciences, Galgotias University, Greater Noida 203201, India
- Department of Pharmacology, Delhi Pharmaceutical Sciences and Research University (DPSRU), Sector 3 Pushp Vihar, New Delhi 110017, India
| | - Sachin Kumar
- Department of Pharmacology, Delhi Pharmaceutical Sciences and Research University (DPSRU), Sector 3 Pushp Vihar, New Delhi 110017, India
| | - Pramod Kumar Sharma
- Department of Pharmacy, School of Medical and Allied Sciences, Galgotias University, Greater Noida 203201, India
| | - Rym Hassani
- Department of Mathematics, University College AlDarb, Jazan University, Jazan 45142, Saudi Arabia
| | - Hamad Ghaleb Dailah
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan 45142, Saudi Arabia
| | - Asaad Khalid
- Substance Abuse and Toxicology Research Centre, Jazan University, Jazan 45142, Saudi Arabia
- Medicinal and Aromatic Plants and Traditional Medicine Research Institute, National Center for Research, Khartoum P.O. Box 2404, Sudan
| | - Syam Mohan
- Substance Abuse and Toxicology Research Centre, Jazan University, Jazan 45142, Saudi Arabia
- School of Health Sciences, University of Petroleum and Energy Studies, Dehradun 248007, India
- Center for Transdisciplinary Research, Department of Pharmacology, Saveetha Institute of Medical and Technical Science, Saveetha Dental College, Saveetha University, Chennai 600077, India
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Roldán-San Antonio J, Martín M. Optimal Integrated Plant for Biodegradable Polymer Production. ACS Sustain Chem Eng 2023; 11:2172-2185. [PMID: 36817411 PMCID: PMC9930116 DOI: 10.1021/acssuschemeng.2c05356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/18/2023] [Indexed: 06/18/2023]
Abstract
An integrated facility for the production of biodegradable polymers from biomass residues has been developed. Lignocellulosic residues (sawdust), CO2, and organic waste such as manure or sludge are the raw materials. Manure and sludge are digested to provide the nutrients needed to grow algae. Algae are used in full to oil and starch production. The oil is transesterified with methanol generated via biogas dry reforming to obtain biodiesel and glycerol. The starch is used together with glycerol and the pretreated sawdust for the production of the biodegradable polymer. A mathematical optimization approach is used to identify the best use of each resource and the optimal operation of the integrated facility for each case. 4732 kt/yr of manure or 4653 kt/yr of sludge was processed to produce 354 kt/yr of biopolymer and 84 Mgal/yr of fatty acid methyl ester, capturing 2.47 kg of CO2 per kg of biopolymer with production costs of 0.89 and 0.95 $/kg, respectively, and an investment capital of 717 and 712 M$, respectively.
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Yang Z, Lou Y, Pan H, Wang H, Yang Q, Zhuge Y, Hu J. Improved Denitrification Performance of Polybutylene Succinate/Corncob Composite Carbon Source by Proper Pretreatment: Performance, Functional Genes and Microbial Community Structure. Polymers (Basel) 2023; 15:polym15040801. [PMID: 36850087 PMCID: PMC9958998 DOI: 10.3390/polym15040801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
Blending biodegradable polymers with plant materials is an effective method to improve the biodegradability of solid carbon sources and save denitrification costs, but the recalcitrant lignin in plant materials hinders the microbial decomposition of available carbon sources. In the present study, corncob pretreated by different methods was used to prepare polybutylene succinate/corncob (PBS/corncob) composites for biological denitrification. The PBS/corncob composite with alkaline pretreatment achieved the optimal NO3--N removal rate (0.13 kg NO3--N m-3 day-1) with less adverse effects. The pretreatment degree, temperature, and their interaction distinctly impacted the nitrogen removal performance and dissolved organic carbon (DOC) release, while the N2O emission was mainly affected by the temperature and the interaction of temperature and pretreatment degree. Microbial community analysis showed that the bacterial community was responsible for both denitrification and lignocellulose degradation, while the fungal community was primarily in charge of lignocellulose degradation. The outcomes of this study provide an effective strategy for improving the denitrification performance of composite carbon sources.
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Chen H, Chen F, Chen H, Liu H, Chen L, Yu L. Thermal degradation and combustion properties of most popular synthetic biodegradable polymers. Waste Manag Res 2023; 41:431-441. [PMID: 36250214 PMCID: PMC9925886 DOI: 10.1177/0734242x221129054] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/24/2022] [Indexed: 06/16/2023]
Abstract
Various products made from biodegradable polymers have been increasing rapidly in the market since the use of non-biodegradable materials has been banned, particularly for the disabled packaging materials. Burning remains the most popular method that is increasingly used in treating city wastes. The impact of these polymers on environmental during thermal degradation and combustion is an important issue for city waste management. In this work, the thermal degradation and combustion behaviours of the most popular synthetic biodegradable polymers in the market, poly(lactide acid) (PLA), poly(e-caprolactone) (PCL), poly(butylene succinate) (PBS), poly(butylene adipate-co-terephthalate) (PBAT) and polyhydroxyalkenoates (PHA), are investigated. Both isothermal and non-isothermal thermal decomposition in oxygen and nitrogen environment were studied using thermogravimetric analysis combining with differential scanning calorimeter and coupled with Fourier transform infrared spectroscopy and gas chromatograph/mass spectroscopy. The combustion behaviour was investigated by a combustion colorimeter. The study results show that thermal degradation temperatures are PCL > PBS > PLA > PBAT > PHA. The thermal decomposition of all the polyesters started from scission reaction (cis-elimination), and then a stereoselective cis-elimination, which resulted in the formation of trans-crotonic acid and its oligomers. They all decomposed into CO2 and water in excess oxygen environment above 800°C. Various chemical products with smaller molecules were detected under oxygen-free conditions, including oligomers and unsaturated carboxylic acid. The order of the total heat release of the materials from high to low is as follows: PHA > PCL > PBAT > PBS > PLA. The combustion values of these polyesters are lower than those of polyolefins; thus, they will not damage furnace used currently. The results provide some important and useful data for managing these new city waste.
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Affiliation(s)
| | | | | | | | | | - Long Yu
- Long Yu, Centre for Polymer from
Renewable Resources, School of Food Science and Engineering, South
China University of Technology, Guangzhou 510640, China.
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Amela-Cortes M, Dumait N, Artzner F, Cordier S, Molard Y. Flexible and Transparent Luminescent Cellulose-Transition Metal Cluster Composites. Nanomaterials (Basel) 2023; 13:580. [PMID: 36770542 PMCID: PMC9920715 DOI: 10.3390/nano13030580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/25/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
Red-NIR luminescent polymers are principally obtained from petroleum-based derivatives in which emitters, usually a critical raw material such as rare-earth or platinum group metal ions, are embedded. Considering the strong ecological impact of their synthesis and the major risk of fossil fuel energy shortage, there is an urgent need to find alternatives. We describe a luminescent nanocomposite based on red-NIR phosphorescent molybdenum nanoclusters, namely Cs2Mo6I8(OCOC2F5)6, embedded in an eco-friendly cellulose biopolymer matrix that is obtained by a simple solvent casting technique. While homogeneity is kept up to 20 wt% of cluster complex doping, annealing hybrids leads to a large increase of their emission efficiency, as demonstrated by quantum yield measurements.
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Santos-Beneit F, Chen LM, Bordel S, Frutos de la Flor R, García-Depraect O, Lebrero R, Rodriguez-Vega S, Muñoz R, Börner RA, Börner T. Screening Enzymes That Can Depolymerize Commercial Biodegradable Polymers: Heterologous Expression of Fusarium solani Cutinase in Escherichia coli. Microorganisms 2023; 11:microorganisms11020328. [PMID: 36838293 PMCID: PMC9963400 DOI: 10.3390/microorganisms11020328] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 01/31/2023] Open
Abstract
In recent years, a number of microbial enzymes capable of degrading plastics have been identified. Biocatalytic depolymerization mediated by enzymes has emerged as a potentially more efficient and environmentally friendly alternative to the currently employed methods for plastic treatment and recycling. However, the functional and systematic study of depolymerase enzymes with respect to the degradation of a series of plastic polymers in a single work has not been widely addressed at present. In this study, the ability of a set of enzymes (esterase, arylesterase and cutinase) to degrade commercial biodegradable polymers (PBS, PBAT, PHB, PHBH, PHBV, PCL, PLA and PLA/PCL) and the effect of pre-treatment methods on their degradation rate was assessed. The degradation products were identified and quantified by HPLC and LC-HRMS analysis. Out of the three enzymes, Fusarium solani cutinase (FsCut) showed the highest activity on grinded PBAT, PBS and PCL after 7 days of incubation. FsCut was engineered and heterologous expressed in Escherichia coli, which conferred the bacterium the capability of degrading solid discs of PBAT and to grow in PBS as the sole carbon source of the medium.
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Affiliation(s)
- Fernando Santos-Beneit
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Correspondence: (F.S.-B.); (T.B.)
| | - Le Min Chen
- Nestlé Research, Société des Produits Nestlé S.A, Route du Jorat 57, 1000 Lausanne, Switzerland
| | - Sergio Bordel
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
| | - Raquel Frutos de la Flor
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
| | - Octavio García-Depraect
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
| | - Raquel Lebrero
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
| | - Sara Rodriguez-Vega
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
| | - Raúl Muñoz
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain
| | - Rosa Aragão Börner
- Nestlé Research, Société des Produits Nestlé S.A, Route du Jorat 57, 1000 Lausanne, Switzerland
| | - Tim Börner
- Nestlé Research, Société des Produits Nestlé S.A, Route du Jorat 57, 1000 Lausanne, Switzerland
- Correspondence: (F.S.-B.); (T.B.)
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Wiszumirska K, Czarnecka-Komorowska D, Kozak W, Biegańska M, Wojciechowska P, Jarzębski M, Pawlak-Lemańska K. Characterization of Biodegradable Food Contact Materials under Gamma-Radiation Treatment. Materials (Basel) 2023; 16:859. [PMID: 36676596 PMCID: PMC9861635 DOI: 10.3390/ma16020859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Radiation is an example of one of the techniques used for pasteurization and sterilization in various packaging systems. There is a high demand for the evaluation of the possible degradation of new composites, especially based on natural raw materials. The results of experimental research that evaluated the impact of radiation technology on biodegradable and compostable packaging materials up to 40 kGy have been presented. Two commercially available flexible composite films based on aliphatic-aromatic copolyesters (AA) were selected for the study, including one film with chitosan and starch (AA-CH-S) and the other with thermoplastic starch (AA-S). The materials were subjected to the influence of ionizing radiation from 10 to 40 kGy and then tests were carried out to check their usability as packaging material for the food industry. The results showed that the mechanical properties of AA-S films improved due to the radiation-induced cross-linking processes, while in the case of AA-CH-S films, a considerable decrease in the elongation at break was observed. The results also showed a decrease in the WVTR in the case of AA-S and no changes in barrier properties in the case of AA-CH-S. Both materials revealed no changes in the odor analyzed by sensory analysis. In the case of the AA-S films, the higher the radiation dose, the faster the biodegradation rate. In the case of the AA-CH-S film, the radiation did not affect biodegradation. The performed research enables the evaluation of the materials intended for direct contact with food. AA-CH-S was associated with unsatisfactory parameters (exceeding the overall migration limit and revealing color change during storage) while AA-S showed compliance at the level of tests carried out. The study showed that the AA-CH-S composite did not show a synergistic effect due to the presence of chitosan.
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Affiliation(s)
- Karolina Wiszumirska
- Department of Industrial Products and Packaging Quality, Institute of Quality Science, Poznan University of Economics and Business, Al. Niepodległosci 10, 61-875 Poznan, Poland
| | - Dorota Czarnecka-Komorowska
- Polymer Processing Division, Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
| | - Wojciech Kozak
- Department of Industrial Products and Packaging Quality, Institute of Quality Science, Poznan University of Economics and Business, Al. Niepodległosci 10, 61-875 Poznan, Poland
| | - Marta Biegańska
- Department of Industrial Products and Packaging Quality, Institute of Quality Science, Poznan University of Economics and Business, Al. Niepodległosci 10, 61-875 Poznan, Poland
| | - Patrycja Wojciechowska
- Department of Industrial Products and Packaging Quality, Institute of Quality Science, Poznan University of Economics and Business, Al. Niepodległosci 10, 61-875 Poznan, Poland
| | - Maciej Jarzębski
- Department of Physics and Biophysics, Faculty of Food Science and Nutrition, Poznan University of Life Sciences, Wojska Polskiego 38/42, 60-637 Poznan, Poland
| | - Katarzyna Pawlak-Lemańska
- Department of Technology and Instrumental Analysis, Institute of Quality Science, Poznan University of Economics and Business, Al. Niepodległości 10, 61-875 Poznan, Poland
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das Neves MDS, Scandorieiro S, Pereira GN, Ribeiro JM, Seabra AB, Dias AP, Yamashita F, Martinez CBDR, Kobayashi RKT, Nakazato G. Antibacterial Activity of Biodegradable Films Incorporated with Biologically-Synthesized Silver Nanoparticles and the Evaluation of Their Migration to Chicken Meat. Antibiotics (Basel) 2023; 12:antibiotics12010178. [PMID: 36671379 PMCID: PMC9854460 DOI: 10.3390/antibiotics12010178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/12/2023] [Accepted: 01/12/2023] [Indexed: 01/17/2023] Open
Abstract
The food industry has been exploring the association of polymers with nanoparticles in packaging production, and active products are essential to increase the shelf life of food and avoid contamination. Our study developed starch-poly (adipate co-terephthalate butyl) films with silver nanoparticles produced with Fusarium oxysporum components (bio-AgNPs), intending to control foodborne pathogens. The bio-AgNPs showed activity against different Salmonella serotypes, including multidrug-resistant Salmonella Saint Paul and Salmonella Enteritidis, with minimum bactericidal concentrations ranging from 4.24 to 16.98 µg/mL. Biodegradable films with bio-AgNPs inhibited the growth of up to 106Salmonella isolates. Silver migration from the films to chicken was analyzed using electrothermal atomic absorption spectrophotometry, and the results showed migration values (12.94 mg/kg and 3.79 mg/kg) above the limits allowed by the European Food Safety Authority (EFSA) (0.05 mg/kg). Thus, it is necessary to improve the technique to avoid the migration of silver to chicken meat, since these concentrations can be harmful.
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Affiliation(s)
- Meiriele da S. das Neves
- Laboratory of Basic and Applied Bacteriology, Department of Microbiology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Sara Scandorieiro
- Laboratory of Basic and Applied Bacteriology, Department of Microbiology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Giovana N. Pereira
- Laboratory of Basic and Applied Bacteriology, Department of Microbiology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Jhonatan M. Ribeiro
- Laboratory of Basic and Applied Bacteriology, Department of Microbiology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Amedea B. Seabra
- Center of Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil
| | - Adriana P. Dias
- Department of Food Science and Technology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Fabio Yamashita
- Department of Food Science and Technology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Claudia B. dos R. Martinez
- Laboratory of Animal Ecophysiology, Department of Physiological Science, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Renata K. T. Kobayashi
- Laboratory of Basic and Applied Bacteriology, Department of Microbiology, Londrina State University, Londrina 86057-970, PR, Brazil
| | - Gerson Nakazato
- Laboratory of Basic and Applied Bacteriology, Department of Microbiology, Londrina State University, Londrina 86057-970, PR, Brazil
- Correspondence: ; Tel.: +55-43-3371-4788
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Purohit D, Jalwal P, Manchanda D, Saini S, Verma R, Kaushik D, Mittal V, Kumar M, Bhattacharya T, Rahman MH, Dutt R, Pandey P. Nanocapsules: An Emerging Drug Delivery System. Recent Pat Nanotechnol 2023; 17:190-207. [PMID: 35142273 DOI: 10.2174/1872210516666220210113256] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/22/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Controlled drug release and site-specific delivery of drugs make nanocapsules the most approbative drug delivery system for various kinds of drugs, bioactive, protein, and peptide compounds. Nanocapsules (NCs) are spherical shape microscopic shells consisting of a core (solid or liquid) in which the drug is positioned in a cavity enclosed by a distinctive polymeric membrane. OBJECTIVES The main objective of the present patent study is to elaborate on various formulation techniques and methods of nanocapsules (NCs). The review also spotlights various biomedical applications as well as on the patents of NCs to date. METHODS The review was extracted from the searches performed using various search engines such as PubMed, Google Patents, Medline, Google Scholars, etc. In order to emphasize the importance of NCs, some published patents of NCs have also been reported in the review. RESULTS NCs are tiny magical shells having incredible reproducibility. Various techniques can be used to formulate NCs. The pharmaceutical performance of the formulated NCs can be judged by evaluating their shape, size, entrapment efficiency, loading capacity, etc., using different analytical techniques. Their main applications are found in the field of agrochemicals, genetic manipulation, cosmetics, hygiene items, strategic distribution of drugs to tumors, nanocapsule bandages to combat infection, and radiotherapy. CONCLUSION In the present review, our team made a deliberate effort to summarize the recent advances in the field of NCs and focus on new patents related to the implementation of NCs delivery systems in the area of some life-threatening disorders like diabetes, cancer, and cardiovascular diseases.
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Affiliation(s)
- Deepika Purohit
- Department of Pharmaceutical Sciences, Indira Gandhi University, Meerpur, Rewari, 123401, India
| | - Pawan Jalwal
- Shri Baba Mastnath Institute of Pharmaceutical Sciences and Research, Baba Mastnath University, Rohtak, 124001, India
| | - Deeksha Manchanda
- Department of Pharmaceutical Sciences, Indira Gandhi University, Meerpur, Rewari, 123401, India
| | - Sapna Saini
- PDM School of Pharmacy, Karsindhu, Jind, 126102, India
| | - Ravinder Verma
- Department of Pharmacy, School of Medical and Allied Sciences, G.D. Goenka University, Gurugram, 122103, India
| | - Deepak Kaushik
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, 124001, India
| | - Vineet Mittal
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, 124001, India
| | - Manish Kumar
- MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University) Mullana, Ambala, 133207, India
| | - Tanima Bhattacharya
- Innovation, Incubation and Industry (i-cube) Laboratory, Techno India NJR Institute of Technology, Udaipur, 313003, Rajasthan, India
| | - Md Habibur Rahman
- Department of Pharmacy, Southeast University, Banani, Dhaka, 1213, Bangladesh
| | - Rohit Dutt
- Department of Pharmacy, School of Medical and Allied Sciences, G.D. Goenka University, Gurugram, 122103, India
| | - Parijat Pandey
- Department of Pharmaceutical Sciences, Gurugram University, Gurugram, 122018, India
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Gawdzik B, Bukowska-Śluz I, Koziol AE, Mazur L. Synthesis and Characterization of Biodegradable Polymers Based on Glucose Derivatives. Materials (Basel) 2022; 16:253. [PMID: 36614592 PMCID: PMC9822088 DOI: 10.3390/ma16010253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/21/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
Syntheses of two new monomers, namely the glucose derivatives 2,3,4,6-tetra-O-acetyl-1 methacryloyl-glucopyranose (MGlc) and 2,3,4,6 tetra-O-acetyl-1-acryloylglucopyranose (AGlc), are presented. Their chemical structures were determined by the FTIR, 1H and 13C NMR spectroscopies, the single-crystal X-ray analysis, supported by the powder X-ray diffraction, and the DSC analyses. Molecules of both monomers exist in the β-anomeric form in the solid state. The variable temperature X-ray diffraction studies, supported by the DSC analyses, revealed AGlc's propensity for polymorphism and temperature-induced phase transitions. MGlc and AGlc crystallised from methanol were polymerized or copolymerized with methyl methacrylate and N-vinylpyrrolidone. The biodegradabilities of polymers as well as thermal and optical properties were studied. The results show that some properties of the obtained homopolymers and copolymers resemble those of PMMA. The main difference is that the AGlc and MGlc homopolymers are biodegradable while PMMA is not. The ternary copolymers, i.e., MGlc/AGlc-MMA-NVP lose more than 10% of their weight after six months.
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Alhulaybi Z, Dubdub I, Al-Yaari M, Almithn A, Al-Naim AF, Aljanubi H. Pyrolysis Kinetic Study of Polylactic Acid. Polymers (Basel) 2022; 15. [PMID: 36616361 DOI: 10.3390/polym15010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/11/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Polylactic acid (PLA) is a biodegradable polymer and is mainly used in the textile and food packaging fields. The aim of this work is to build knowledge on the kinetics of the pyrolysis of PLA with the help of thermogravimetric analysis (TGA) using four model-free methods, namely Friedman, Flynn-Wall-Qzawa (FWO), Kissinger-Akahira-Sunose (KAS), and Starink. Additionally, two model-fitting methods (the Coats-Redfern and Criado methods) were applied. TGA data at 5, 10, 20, and 30 K/min heating rates were collected. The obtained activation energies of the pyrolysis of PLA at different conversions by the model-free models were in good agreement and the average values were 97, 109, 104, and 104 kJ/mol for Friedman, FWO, KAS, and Starink, respectively. The Criado model was used together with the Coats-Redfern model to identify the most appropriate reaction mechanism. As per this work, the best controlling reaction mechanism of the PLA pyrolysis can be expressed by the geometrical contraction model (R2).
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Alhusaini Q, Scheld WS, Jia Z, Das D, Afzal F, Müller M, Schönherr H. Bare Eye Detection of Bacterial Enzymes of Pseudomonas aeruginosa with Polymer Modified Nanoporous Silicon Rugate Filters. Biosensors (Basel) 2022; 12:1064. [PMID: 36551031 PMCID: PMC9776340 DOI: 10.3390/bios12121064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
The fabrication, characterization and application of a nanoporous Silicon Rugate Filter (pSiRF) loaded with an enzymatically degradable polymer is reported as a bare eye detection optical sensor for enzymes of pathogenic bacteria, which is devoid of any dyes. The nanopores of pSiRF were filled with poly(lactic acid) (PLA), which, upon enzymatic degradation, resulted in a change in the effective refractive index of the pSiRF film, leading to a readily discernible color change of the sensor. The shifts in the characteristic fringe patterns before and after the enzymatic reaction were analyzed quantitatively by Reflectometric Interference Spectroscopy (RIfS) to estimate the apparent kinetics and its dependence on enzyme concentration. A clear color change from green to blue was observed by the bare eye after PLA degradation by proteinase K. Moreover, the color change was further confirmed in measurements in bacterial suspensions of the pathogen Pseudomonas aeruginosa (PAO1) as well as in situ in the corresponding bacterial supernatants. This study highlights the potential of the approach in point of care bacteria detection.
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Affiliation(s)
- Qasim Alhusaini
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Walter Sebastian Scheld
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Zhiyuan Jia
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Dipankar Das
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
- Department of Chemistry, SRM Institute of Science and Technology, SRM Nagar, Potheri, Kattankulathur 603203, India
| | - Faria Afzal
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Mareike Müller
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Holger Schönherr
- Physical Chemistry I and Research Center of Micro and Nanochemistry and (Bio)Technology (Cμ), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
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Lapii GA, Eisenakh IA, Bakarev MA, Pichigina AK, Lushnikova EL. Features of Cell Reactions during Implantation of Biodegradable Polymer and Polypropylene in the Experiment. Bull Exp Biol Med 2022; 174:137-141. [PMID: 36437328 DOI: 10.1007/s10517-022-05662-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Indexed: 11/29/2022]
Abstract
Quantitative and qualitative characteristics of cell infiltrates in male Wistar rats were studied from 14 days to 12 months after implantation of polypropylene and a biodegradable polymer obtained by electrospinning and consisting of 65% polycaprolactone and 35% polytrimethylene carbonate. It was found that a predominantly macrophage-giant cell reaction developed around the biodegradable polymer; it spread into the matrix and the number of cells in the infiltrate decreased, as the degradation progressed. Around polypropylene, mainly lymphocytic and leukocytic reaction was seen; it also decreased with time, but was characterized by a reverse increase in the number of lymphocytes. Immunohistochemical analysis showed that the proportion of CD38+ cells 12 months after implantation increased around polypropylene to a greater extent than around the biodegradable polymer, while the proportion of CD68+ cells decreased. These findings suggest that implantation of a biodegradable polymer caused no prolonged lymphocytic and plasma cell reaction in animals as in the case of polypropylene, which indicates that biodegradable polymer is a promising material for tissue engineering.
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Affiliation(s)
- G A Lapii
- Federal Research Center of Fundamental and Translational Medicine, Siberian Division of the Russian Academy of Sciences, Novosibirsk, Russia.
| | - I A Eisenakh
- Federal Research Center of Fundamental and Translational Medicine, Siberian Division of the Russian Academy of Sciences, Novosibirsk, Russia
| | - M A Bakarev
- Federal Research Center of Fundamental and Translational Medicine, Siberian Division of the Russian Academy of Sciences, Novosibirsk, Russia
| | - A K Pichigina
- Federal Research Center of Fundamental and Translational Medicine, Siberian Division of the Russian Academy of Sciences, Novosibirsk, Russia
| | - E L Lushnikova
- Federal Research Center of Fundamental and Translational Medicine, Siberian Division of the Russian Academy of Sciences, Novosibirsk, Russia
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42
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Ito T, Yamazoe E, Tahara K. Dry Powder Inhalers for Proteins Using Cryo-Milled Electrospun Polyvinyl Alcohol Nanofiber Mats. Molecules 2022; 27:5158. [PMID: 36014394 DOI: 10.3390/molecules27165158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/09/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022]
Abstract
To enable the efficient delivery of drugs to the lungs, the drug particle design for most dry powder inhalers (DPIs) involves reducing the aerodynamic particle size to a few microns using methods such as spray-drying or jet-milling. Stresses, including heat and the shear forces generated by the preparation processes, may result in the degradation and denaturation of drugs such as those based on peptides and proteins. Here, we showed that cryo-milled polyvinyl alcohol nanofiber mats loaded with α-chymotrypsin by electrospinning exhibited suitable inhalation properties for use in DPIs, while maintaining enzymatic activity. The cryo-milled nanofiber mats were porous to fine particles, and the particle size and drug stability depended on the freezing and milling times. The median diameter of the milled fiber mats was 12.6 μm, whereas the mass median aerodynamic diameter was 5.9 μm. The milled nanofiber mats were successfully prepared, while retaining the enzymatic activity of α-chymotrypsin; furthermore, the activity of milled fiber mats that had been stored for 6 months was comparable to the activity of those that were freshly prepared. This novel method may be suitable for the DPI preparation of various drugs because it avoids the heating step during the DPI preparation process.
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43
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Ayad C, Yavuz A, Salvi JP, Libeau P, Exposito JY, Ginet V, Monge C, Verrier B, Arruda DC. Comparison of Physicochemical Properties of LipoParticles as mRNA Carrier Prepared by Automated Microfluidic System and Bulk Method. Pharmaceutics 2022; 14:1297. [PMID: 35745869 DOI: 10.3390/pharmaceutics14061297] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/13/2022] [Accepted: 06/16/2022] [Indexed: 02/04/2023] Open
Abstract
Polymeric and/or lipid platforms are promising tools for nucleic acid delivery into cells. We previously reported a lipid–polymer nanocarrier, named LipoParticles, consisting of polylactic acid nanoparticles surrounded by cationic lipids, and allowing the addition of mRNA and cationic LAH4-1 peptide at their surface. Although this mRNA platform has shown promising results in vitro in terms of mRNA delivery and translation, the bulk method used to prepare LipoParticles relies on a multistep and time-consuming procedure. Here, we developed an automated process using a microfluidic system to prepare LipoParticles, and we compared it to the bulk method in terms of morphology, physicochemical properties, and ability to vectorize and deliver mRNA in vitro. LipoParticles prepared by microfluidic presented a smaller size and more regular spherical shape than bulk method ones. In addition, we showed that the total lipid content in LipoParticles was dependent on the method of preparation, influencing their ability to complex mRNA. LipoParticles decorated with two mRNA/LAHA-L1 ratios (1/20, 1/5) could efficiently transfect mouse DC2.4 cells except for the automated 1/5 assay. Moreover, the 1/5 mRNA/LAHA-L1 ratio drastically reduced cell toxicity observed in 1/20 ratio assays. Altogether, this study showed that homogeneous LipoParticles can be produced by microfluidics, which represents a promising platform to transport functional mRNA into cells.
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Wang Q, Yu X, Chen X, Gao J, Shi D, Shen Y, Tang J, He J, Li A, Yu L, Ding J. A Facile Composite Strategy to Prepare a Biodegradable Polymer Based Radiopaque Raw Material for "Visualizable" Biomedical Implants. ACS Appl Mater Interfaces 2022; 14:24197-24212. [PMID: 35580332 DOI: 10.1021/acsami.2c05184] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Enabling a biodegradable polymer radiopaque under X-ray is much desired for many medical devices. Physical blending of a present biodegradable polymer and a commercialized medical contrast agent is convenient yet lacks comprehensive fundamental research. Herein, we prepared a biodegradable polymer-based radiopaque raw material by blending poly(l-lactic acid) (PLLA or simply PLA) and iohexol (IHX), where PLA constituted the continuous phase and IHX particles served as the dispersed phase. The strong X-ray adsorption of IHX enabled the composite radiopaque; the hydrolysis of the polyester and the water solubility of the contrast agent enabled the composite biodegradable in an aqueous medium. The idea was confirmed by in vitro characterizations of the resultant composite, in vivo subcutaneous implantation in rats up to 6 months, and the clear visualization of a part of a biodegradable occluder in a Bama piglet under X-ray. We also found that the crystallization of PLA was significantly enhanced in the presence of the solid particles, which should be taken into consideration in the design of an appropriate biomaterial composite because crystallization degree influences the biodegradation rate and mechanical property of a material to a large extent. We further tried to introduce a small amount of poly(vinylpyrrolidone) into the blend of PLA and IHX. Compared to the bicomponent composite, the tricomponent one exhibited decreased modulus and increased elongation at break and tensile strength. This paves more ways for researchers to select appropriate raw materials according to the regenerated tissue and the application site.
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Affiliation(s)
- Qunsong Wang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Xiaoye Yu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Xianmiao Chen
- R&D Center, Lifetech Scientific (Shenzhen) Co., Ltd., Shenzhen 518057, China
| | - Jingming Gao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Daokun Shi
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Yang Shen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jingyu Tang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Junhao He
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Anning Li
- R&D Center, Lifetech Scientific (Shenzhen) Co., Ltd., Shenzhen 518057, China
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
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Iqbal S, Martins AF, Sohail M, Zhao J, Deng Q, Li M, Zhao Z. Synthesis and Characterization of Poly (β-amino Ester) and Applied PEGylated and Non-PEGylated Poly (β-amino ester)/Plasmid DNA Nanoparticles for Efficient Gene Delivery. Front Pharmacol 2022; 13:854859. [PMID: 35462891 PMCID: PMC9023864 DOI: 10.3389/fphar.2022.854859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/21/2022] [Indexed: 11/15/2022] Open
Abstract
Polymer-based nanocarriers require extensive knowledge of their chemistries to learn functionalization strategies and understand the nature of interactions that they establish with biological entities. In this research, the poly (β-amino ester) (PβAE-447) was synthesized and characterized, aimed to identify the influence of some key parameters in the formulation process. Initially; PβAE-447 was characterized for aqueous solubility, swelling capacity, proton buffering ability, and cytotoxicity study before nanoparticles formulation. Interestingly, the polymer-supported higher cell viability than the Polyethylenimine (PEI) at 100 μg/ml. PβAE-447 complexed with GFP encoded plasmid DNA (pGFP) generated nanocarriers of 184 nm hydrodynamic radius (+7.42 mV Zeta potential) for cell transfection. Transfection assays performed with PEGylated and lyophilized PβAE-447/pDNA complexes on HEK-293, BEAS-2B, and A549 cell lines showed better transfection than PEI. The outcomes toward A549 cells (above 66%) showed the highest transfection efficiency compared to the other cell lines. Altogether, these results suggested that characterizing physicochemical properties pave the way to design a new generation of PβAE-447 for gene delivery.
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Affiliation(s)
- Sajid Iqbal
- Department of Pharmaceutics, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Alessandro F Martins
- Laboratory of Materials, Macromolecules, and Composites (LaMMAC), Federal University of Technology - Paraná (UTFPR), Apucarana, Brazil.,Group of Polymers and Composite Materials (GMPC), Department of Chemistry, State University of Maringá (UEM), Maringá, Brazil.,Department of Chemical and Biological Engineering, Colorado State University (CSU), Fort Collins, CO, United States
| | - Muhammad Sohail
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, Yantai University, Yantai, China
| | - Jingjing Zhao
- Department of Pharmaceutics, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qi Deng
- Department of Pharmaceutics, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Muhan Li
- Department of Pharmaceutics, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zhongxi Zhao
- Department of Pharmaceutics, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key University Laboratory of Pharmaceutics and Drug Delivery Systems of Shandong Province, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,Pediatric Pharmaceutical Engineering Laboratory of Shandong Province, Shandong Dyne Marine Biopharmaceutical Company Limited, Rongcheng, China.,Chemical Immunopharmaceutical Engineering Laboratory of Shandong Province, Shandong Xili Pharmaceutical Company Limited, Heze, China
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Coughlan JJ, Aytekin A, Lenz T, Koch T, Wiebe J, Cassese S, Joner M, Koppara T, Xhepa E, Kessler T, Ibrahim T, Laugwitz KL, Schunkert H, Kastrati A, Kufner S. Ten-Year Clinical Outcomes in Patients With Acute Coronary Syndrome Treated With Biodegradable, Permanent-Polymer or Polymer-Free Drug-Eluting Stents. J Invasive Cardiol 2022; 34:E266-E273. [PMID: 35343914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVES This study aimed to compare 10-year clinical outcomes in patients with acute coronary syndrome (ACS) treated with new-generation biodegradable-polymer (BP-DES), polymer-free (PF-DES), and permanent-polymer drug-eluting stents (PPDES). METHODS We analyzed 10-year clinical outcomes for 2042 patients with ACS enrolled in the ISAR-TEST 4 and ISAR-TEST 5 randomized controlled trials. Patients were divided into 3 groups: new-generation PP-DES, BP-DES, and PF-DES. Endpoints of interest included a device-oriented composite endpoint (DOCE) and a patient-oriented composite endpoint (POCE) at 10 years. RESULTS BP-DES as compared with PP-DES demonstrated a lower DOCE frequency, but this did not meet statistical significance (BP-DES vs PP-DES, 35.4% vs 41.5%, respectively; adjusted hazard ratio (HR), 0.83; 95% confidence interval [CI], 0.68-1.00; P=.05). There was a significantly lower POCE frequency in patients treated with BP-DES compared with PP-DES (65.3% vs 69.0%, respectively; HR, 0.86; 95% CI, 0.75-0.99; P=.04). The relative frequency of the DOCE (41.4% vs 41.5%; HR, 0.97; 95% CI, 0.83-1.15; P=.76) and the POCE (66.8% vs 69.0%; HR, 0.99; 0.87-1.12; P=.82) were comparable in patients treated with PF-DES and PP-DES. CONCLUSION In patients with ACS, BP-DES were associated with a lower relative frequency of a POCE compared with new-generation PP-DES at 10 years. The relative frequencies of both device- and patient-related outcomes were comparable in patients treated with PF-DES and PP-DES at 10 years.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Sebastian Kufner
- Deutsches Herzzentrum München Lazarettstrasse, 36, Munich, Germany.
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47
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Hauptmann N, Ludolph J, Rothe H, Rost J, Krupp A, Lechner J, Kohlhaas S, Winkler M, Stender B, Hildebrand G, Liefeith K. Poly-Alanine-ε-Caprolacton-Methacrylate as Scaffold Material with Tuneable Biomechanical Properties for Osteochondral Implants. Int J Mol Sci 2022; 23:3115. [PMID: 35328536 DOI: 10.3390/ijms23063115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/12/2022] [Accepted: 03/13/2022] [Indexed: 02/01/2023] Open
Abstract
An aging population and injury-related damage of the bone substance lead to an increasing need of innovative materials for the regeneration of osteochondral defects. Biodegradable polymers form the basis for suitable artificial implants intended for bone replacement or bone augmentation. The great advantage of these structures is the site-specific implant design, which leads to a considerable improvement in patient outcomes and significantly reduced post-operative regeneration times. Thus, biomechanical and biochemical parameters as well as the rate of degradation can be set by the selection of the polymer system and the processing technology. Within this study, we developed a polymer platform based on the amino acid Alanine and ε-Caprolacton for use as raw material for osteochondral implants. The biomechanical and degradation properties of these Poly-(Alanine-co-ε-Caprolacton)-Methacrylate (ACM) copolymers can be adjusted by changing the ratio of the monomers. Fabrication of artificial structures for musculo-skeletal tissue engineering was done by Two-Photon-Polymerization (2PP), which represents an innovative technique for generating defined scaffolds with tailor-made mechanical and structural properties. Here we show the synthesis, physicochemical characterization, as well as first results for structuring ACM using 2PP technology. The data demonstrate the high potential of ACM copolymers as precursors for the fabrication of biomimetic implants for bone-cartilage reconstruction.
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48
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Iqbal S, Nadeem S, Javed M, Alsaab HO, Awwad NS, Ibrahium HA, Mohyuddin A. Controlled preparation of grafted starch modified with Ni nanoparticles for biodegradable polymer nanocomposites and its application in food packaging. Microsc Res Tech 2022; 85:2331-2337. [PMID: 35238434 DOI: 10.1002/jemt.24089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/12/2022] [Accepted: 02/16/2022] [Indexed: 11/07/2022]
Abstract
Grafting of starch with methyl methacrylate was carried out using a free radical mechanism. Free radicals were generated by the thermal disintegration of potassium persulphate at the temperature of 60°C. A variety of experimental methods were investigated to check the effect of different parameters such as (temperature, amount of starch, quantity of monomer) for efficient grafting. The optimum temperature found for good grafting was 60°C. The initial amount of starch was taken as 0.75 g. Keeping the amount of starch constant, the quantity of monomer was reduced gradually from 10 to 2 ml in portions of 5 and 3 ml. The controlled biodegradability of the grafted product was obtained by using a 3 ml monomer in 0.75 g starch. This grafted polymer showed 31.45% biodegradability in 60 days. The nanocomposite of starch grafted methyl methacrylate was prepared by incorporating 0.02 g Ni nanoparticles in the reaction flask 15 min before the completion of reaction time. The starch grafted polymer and nanocomposite of this were fully characterized by SEM, FTIR, TGA, and DSC techniques. The soil burial method was applied to estimate the biodegradability of samples. The polymer containing Ni nanoparticles was less biodegradable than without nanoparticles. Such polymers can be efficiently used as packaging material for food items.
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Affiliation(s)
- Shahid Iqbal
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou, China
| | - Sohail Nadeem
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
| | - Mohsin Javed
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
| | - Hashem O Alsaab
- Department of Pharmaceutics and Pharmaceutical Technology, Taif University, Taif, Saudi Arabia
| | - Nasser S Awwad
- Chemistry Department, King Khalid University, Abha, Saudi Arabia
| | - Hala A Ibrahium
- Biology Department, King Khalid University, Abha, Saudi Arabia.,Department of Semi Pilot Plant, Nuclear Materials Authority, El Maadi, Egypt
| | - Ayesha Mohyuddin
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
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49
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Gao Y, Wang S, Shi B, Wang Y, Chen Y, Wang X, Lee ES, Jiang HB. Advances in Modification Methods Based on Biodegradable Membranes in Guided Bone/Tissue Regeneration: A Review. Polymers (Basel) 2022; 14:871. [PMID: 35267700 DOI: 10.3390/polym14050871] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 02/13/2022] [Accepted: 02/14/2022] [Indexed: 02/04/2023] Open
Abstract
Guided tissue/bone regeneration (GTR/GBR) is commonly applied in dentistry to aid in the regeneration of bone/tissue at a defective location, where the assistive material eventually degrades to be substituted with newly produced tissue. Membranes separate the rapidly propagating soft tissue from the slow-growing bone tissue for optimal tissue regeneration results. A broad membrane exposure area, biocompatibility, hardness, ductility, cell occlusion, membrane void ratio, tissue integration, and clinical manageability are essential functional properties of a GTR/GBR membrane, although no single modern membrane conforms to all of the necessary characteristics. This review considers ongoing bone/tissue regeneration engineering research and the GTR/GBR materials described in this review fulfill all of the basic ISO requirements for human use, as determined through risk analysis and rigorous testing. Novel modified materials are in the early stages of development and could be classified as synthetic polymer membranes, biological extraction synthetic polymer membranes, or metal membranes. Cell attachment, proliferation, and subsequent tissue development are influenced by the physical features of GTR/GBR membrane materials, including pore size, porosity, and mechanical strength. According to the latest advances, key attributes of nanofillers introduced into a polymer matrix include suitable surface area, better mechanical capacity, and stability, which enhances cell adhesion, proliferation, and differentiation. Therefore, it is essential to construct a bionic membrane that satisfies the requirements for the mechanical barrier, the degradation rate, osteogenesis, and clinical operability.
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50
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Starkova O, Platnieks O, Sabalina A, Gaidukovs S. Hydrothermal Ageing Effect on Reinforcement Efficiency of Nanofibrillated Cellulose/Biobased Poly(butylene succinate) Composites. Polymers (Basel) 2022; 14:221. [PMID: 35054628 PMCID: PMC8780645 DOI: 10.3390/polym14020221] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 12/30/2021] [Accepted: 01/04/2022] [Indexed: 11/26/2022] Open
Abstract
Nanofibrillated cellulose (NFC) is a sustainable functional nanomaterial known for its high strength, stiffness, and biocompatibility. It has become a key building block for the next-generation of lightweight, advanced materials for applications such as consumer products, biomedical, energy storage, coatings, construction, and automotive. Tunable and predictable durability under environmental impact is required for high performance applications. Bio-based poly (butylene succinate) (PBS) composites containing up to 50% NFC content were designed and aged in distilled water or at high relative humidity (RH98%). PBS/NFC composites are characterized by up to 10-fold increased water absorption capacity and diffusivity and the data are correlated with model calculations. Aged samples exhibited decreased crystallinity and melting temperature. Incorporation of NFC into PBS showed up to a 2.6-fold enhancement of the elastic modulus, although accompanied by a loss of strength by 40% and 8-fold reduction in the strain at failure of maximally loaded composites. Hydrothermal ageing had almost no influence on the tensile characteristics of PBS; however, there were considerable degradation effects in PBS/NFC composites. Altered reinforcement efficiency is manifested through a 3.7-fold decreased effective elastic moduli of NFC determined by applying the Halpin-Tsai model and a proportional reduction of the storage moduli of composites. The adhesion efficiency in composites was reduced by hydrothermal ageing, as measured Puckanszky's adhesion parameter for the strength, which decreased from 3 to 0.8. For the loss factor, Kubat's adhesion parameter was increased by an order. PBS filled with 20 wt.% NFC is identified as the most efficient composition, for which negative environmental degradation effects are counterbalanced with the positive reinforcement effect. The PBS matrix can be used to protect the NFC network from water.
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Affiliation(s)
- Olesja Starkova
- Institute for Mechanics of Materials, University of Latvia, Jelgavas 3, LV-1004 Riga, Latvia;
| | - Oskars Platnieks
- Faculty of Materials Science and Applied Chemistry, Institute of Polymer Materials, Riga Technical University, P. Valdena 3/7, LV-1048 Riga, Latvia; (O.P.); (S.G.)
| | - Alisa Sabalina
- Institute for Mechanics of Materials, University of Latvia, Jelgavas 3, LV-1004 Riga, Latvia;
| | - Sergejs Gaidukovs
- Faculty of Materials Science and Applied Chemistry, Institute of Polymer Materials, Riga Technical University, P. Valdena 3/7, LV-1048 Riga, Latvia; (O.P.); (S.G.)
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