1
|
Hasan Aneem T, Sarker M, Wong SY, Lim S, Li X, Rashed A, Chakravarty S, Arafat MT. Antimicrobial peptide immobilization on catechol-functionalized PCL/alginate wet-spun fibers to combat surgical site infection. J Mater Chem B 2024. [PMID: 38958038 DOI: 10.1039/d4tb00889h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Surgical site infection (SSI) caused by pathogenic bacteria leads to delayed wound healing and extended hospitalization. Inappropriate uses of antibiotics have caused a surge in SSI and common antibiotics are proving to be ineffective against SSI. Antimicrobial peptides (AMPs) can be a potential solution to prevent SSI because of their broad spectrum of antimicrobial activities. In this study, naturally sourced AMPs were studied along with microfibers, fabricated by a novel wet-spinning method using sodium alginate and polycaprolactone. Afterward, fibers were functionalized by the catechol groups of dopamine immobilizing nucleophilic AMPs on the surface. Conjugation between PCL and alginate resulted in fibers with smooth surfaces improving their mechanical strength via hydrogen bonds. Having an average diameter of 220 μm, the mechanical properties of the fiber complied with USP standards for suture size 3-0. Engineered microfibers were able to hinder the growth of Proteus spp., a pathogenic bacterium for at least 60 hours whereas antibiotic ceftazidime failed. When subjected to a linear incisional wound model study, accelerated healing was observed when the wound was closed using the engineered fiber compared to Vicryl. The microfibers promoted faster re-epithelialization compared to Vicryl proving their higher wound healing capacity.
Collapse
Affiliation(s)
- Taufiq Hasan Aneem
- Department of Biomedical Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka-1205, Bangladesh.
| | - Mridul Sarker
- Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457, Singapore
| | - Siew Yee Wong
- Institute of Sustainability for Chemicals, Energy and Environment, A*STAR (Agency for Science, Technology and Research), Singapore, 138634, Singapore
| | - Sierin Lim
- Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457, Singapore
| | - Xu Li
- Institute of Sustainability for Chemicals, Energy and Environment, A*STAR (Agency for Science, Technology and Research), Singapore, 138634, Singapore
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), Singapore, 138634, Singapore
| | - Asif Rashed
- Department of Microbiology, Mugda Medical College, Dhaka-1214, Bangladesh
| | - Saumitra Chakravarty
- Department of Pathology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka-1000, Bangladesh
| | - M Tarik Arafat
- Department of Biomedical Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka-1205, Bangladesh.
| |
Collapse
|
2
|
Santoro A, Marino M, Vandenberg LN, Szychlinska MA, Lamparelli EP, Scalia F, Rocca ND, D'Auria R, Giovanna Pastorino GM, Porta GD, Operto FF, Viggiano A, Cappello F, Meccariello R. PLASTAMINATION: Outcomes on the Central Nervous System and Reproduction. Curr Neuropharmacol 2024; 22:1870-1898. [PMID: 38549522 DOI: 10.2174/1570159x22666240216085947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 12/05/2023] [Accepted: 12/13/2023] [Indexed: 07/23/2024] Open
Abstract
BACKGROUND Environmental exposures to non-biodegradable and biodegradable plastics are unavoidable. Microplastics (MPs) and nanoplastics (NPs) from the manufacturing of plastics (primary sources) and the degradation of plastic waste (secondary sources) can enter the food chain directly or indirectly and, passing biological barriers, could target both the brain and the gonads. Hence, the worldwide diffusion of environmental plastic contamination (PLASTAMINATION) in daily life may represent a possible and potentially serious risk to human health. OBJECTIVE This review provides an overview of the effects of non-biodegradable and the more recently introduced biodegradable MPs and NPs on the brain and brain-dependent reproductive functions, summarizing the molecular mechanisms and outcomes on nervous and reproductive organs. Data from in vitro, ex vivo, non-mammalian and mammalian animal models and epidemiological studies have been reviewed and discussed. RESULTS MPs and NPs from non-biodegradable plastics affect organs, tissues and cells from sensitive systems such as the brain and reproductive organs. Both MPs and NPs induce oxidative stress, chronic inflammation, energy metabolism disorders, mitochondrial dysfunction and cytotoxicity, which in turn are responsible for neuroinflammation, dysregulation of synaptic functions, metabolic dysbiosis, poor gamete quality, and neuronal and reproductive toxicity. In spite of this mechanistic knowledge gained from studies of non-biodegradable plastics, relatively little is known about the adverse effects or molecular mechanisms of MPs and NPs from biodegradable plastics. CONCLUSION The neurological and reproductive health risks of MPs/NPs exposure warrant serious consideration, and further studies on biodegradable plastics are recommended.
Collapse
Affiliation(s)
- Antonietta Santoro
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Marianna Marino
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Laura N Vandenberg
- Department of Environmental Health Sciences, School of Public Health & Health Sciences, University of Massachusetts Amherst, Amherst, MA, USA
| | - Marta Anna Szychlinska
- Faculty of Medicine and Surgery, Kore University of Enna, Cittadella Universitaria 94100 Enna (EN), Italy
| | - Erwin Pavel Lamparelli
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Federica Scalia
- Euro-Mediterranean Institute of Science and Technology (IEMEST), 90139 Palermo, Italy
| | - Natalia Della Rocca
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Raffaella D'Auria
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Grazia Maria Giovanna Pastorino
- Child and Adolescence Neuropsychiatry Unit, Department of Medicine, Surgery and Dentistry, University of 84100 Salerno, Salerno, Italy
| | - Giovanna Della Porta
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Francesca Felicia Operto
- Department of Science of Health School of Medicine, University Magna Graecia 88100 Catanzaro, Italy
| | - Andrea Viggiano
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Francesco Cappello
- Euro-Mediterranean Institute of Science and Technology (IEMEST), 90139 Palermo, Italy
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, University of Palermo, Palermo, 90127, Italy
| | - Rosaria Meccariello
- Department of Movement and Wellness Sciences, Parthenope University of Naples, 80133 Naples, Italy
| |
Collapse
|
3
|
Sterle Zorec B, Dreu R. Development of Simvastatin-Loaded Particles Using Spray Drying Method for Ex Tempore Preparation of Cartridges for 2D Printing Technology. Pharmaceutics 2023; 15:2221. [PMID: 37765190 PMCID: PMC10537374 DOI: 10.3390/pharmaceutics15092221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/21/2023] [Accepted: 08/26/2023] [Indexed: 09/29/2023] Open
Abstract
In this work, a spray drying method was developed to produce drug/polymer (simvastatin/polycaprolactone) microparticles that have the potential to be used as a pre-formulation for ex tempore preparation of 2D printing cartridges. An experimental model was designed with the process parameters set to predict the smallest particle size required for successful 2D printing. Three different types of particles (lactose, nanocellulose/lactose, calcium silicate) were produced, and the average size of the dry particles varied depending on the sampling location (cyclone, collection vessel). The encapsulation efficiency of simvastatin was highest with nanocellulose/lactose from the collection vessel. The one-month stability of simvastatin in the particles showed low content, but the addition of ascorbic acid as an antioxidant increased the chemical stability of the drug. Interestingly, the addition of antioxidants decreased the stability of simvastatin in the calcium silicate particles from the collection vessel. Dispersion of the particles in three different propylene glycol and water mixtures (10/90, 50/50, and 90/10% (v/v)), representing a printable ink medium with three different viscosity and surface tension properties, showed that nanocellulose/lactose was the most suitable antiadhesive in terms of dispersed particle size (˂1 µm). After one month of storage, the dispersed particles remained in the same size range without undesirable particle agglomeration.
Collapse
Affiliation(s)
- Barbara Sterle Zorec
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva Cesta 7, SI-1000 Ljubljana, Slovenia;
| | | |
Collapse
|
4
|
Posada NC, Sierra CA, Perez LD. An Evaluation of the Effect of Reaction Conditions in the Enzymatically Catalyzed Synthesis of Poly(ϵ‐Caprolactone). ChemistrySelect 2022. [DOI: 10.1002/slct.202202372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Cesar A. Sierra
- Departamento de Química Universidad Nacional de Colombia Bogotá D.C
| | - Leon D. Perez
- Departamento de Química Universidad Nacional de Colombia Bogotá D.C
| |
Collapse
|
5
|
Wang Z, Chan CLC, Haataja JS, Schertel L, Li R, van de Kerkhof GT, Scherman OA, Parker RM, Vignolini S. Deconvoluting the Optical Response of Biocompatible Photonic Pigments. Angew Chem Int Ed Engl 2022; 61:e202206562. [PMID: 35723924 PMCID: PMC9542403 DOI: 10.1002/anie.202206562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Indexed: 11/21/2022]
Abstract
To unlock the widespread use of block copolymers as photonic pigments, there is an urgent need to consider their environmental impact (cf. microplastic pollution). Here we show how an inverse photonic glass architecture can enable the use of biocompatible bottlebrush block copolymers (BBCPs), which otherwise lack the refractive index contrast needed for a strong photonic response. A library of photonic pigments is produced from poly(norbornene‐graft‐polycaprolactone)‐block‐poly(norbornene‐graft‐polyethylene glycol), with the color tuned via either the BBCP molecular weight or the processing temperature upon microparticle fabrication. The structure–optic relationship between the 3D porous morphology of the microparticles and their complex optical response is revealed by both an analytical scattering model and 3D finite‐difference time domain (FDTD) simulations. Combined, this allows for strategies to enhance the color purity to be proposed and realized with our biocompatible BBCP system.
Collapse
Affiliation(s)
- Zhen Wang
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Chun Lam Clement Chan
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Johannes S. Haataja
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Lukas Schertel
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
- Department of Physics University of Fribourg Chemin du Musée 3 1700 Fribourg Switzerland
| | - Ruiting Li
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Gea T. van de Kerkhof
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Oren A. Scherman
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Richard M. Parker
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Silvia Vignolini
- Melville Laboratory for Polymer Synthesis Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| |
Collapse
|
6
|
Wang Z, Chan CLC, Haataja JS, Schertel L, Li R, van de Kerkhof GT, Scherman OA, Parker RM, Vignolini S. Deconvoluting the Optical Response of Biocompatible Photonic Pigments. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 134:e202206562. [PMID: 38504795 PMCID: PMC10946993 DOI: 10.1002/ange.202206562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Indexed: 11/08/2022]
Abstract
To unlock the widespread use of block copolymers as photonic pigments, there is an urgent need to consider their environmental impact (cf. microplastic pollution). Here we show how an inverse photonic glass architecture can enable the use of biocompatible bottlebrush block copolymers (BBCPs), which otherwise lack the refractive index contrast needed for a strong photonic response. A library of photonic pigments is produced from poly(norbornene-graft-polycaprolactone)-block-poly(norbornene-graft-polyethylene glycol), with the color tuned via either the BBCP molecular weight or the processing temperature upon microparticle fabrication. The structure-optic relationship between the 3D porous morphology of the microparticles and their complex optical response is revealed by both an analytical scattering model and 3D finite-difference time domain (FDTD) simulations. Combined, this allows for strategies to enhance the color purity to be proposed and realized with our biocompatible BBCP system.
Collapse
Affiliation(s)
- Zhen Wang
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Chun Lam Clement Chan
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Johannes S. Haataja
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Lukas Schertel
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
- Department of PhysicsUniversity of FribourgChemin du Musée 31700FribourgSwitzerland
| | - Ruiting Li
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Gea T. van de Kerkhof
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Oren A. Scherman
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Richard M. Parker
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Silvia Vignolini
- Melville Laboratory for Polymer SynthesisYusuf Hamied Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| |
Collapse
|
7
|
Wang C, Luan W, Zeng Z, He X, Liu Z, Wang JH. Synthesis, solvent interactions and Hansen solubility parameters of polyvinyl butyral. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04366-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
8
|
Przybyłek M, Miernicka A, Nowak M, Cysewski P. New Screening Protocol for Effective Green Solvents Selection of Benzamide, Salicylamide and Ethenzamide. Molecules 2022; 27:molecules27103323. [PMID: 35630800 PMCID: PMC9144492 DOI: 10.3390/molecules27103323] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/18/2022] [Accepted: 05/20/2022] [Indexed: 02/06/2023] Open
Abstract
New protocol for screening efficient and environmentally friendly solvents was proposed and experimentally verified. The guidance for solvent selection comes from computed solubility via COSMO-RS approach. Furthermore, solute-solvent affinities computed using advanced quantum chemistry level were used as a rationale for observed solvents ranking. The screening protocol pointed out that 4-formylomorpholine (4FM) is an attractive solubilizer compared to commonly used aprotic solvents such as DMSO and DMF. This was tested experimentally by measuring the solubility of the title compounds in aqueous binary mixtures in the temperature range between 298.15 K and 313.15 K. Additional measurements were also performed for aqueous binary mixtures of DMSO and DMF. It has been found that the solubility of studied aromatic amides is very high and quite similar in all three aprotic solvents. For most aqueous binary mixtures, a significant decrease in solubility with a decrease in the organic fraction is observed, indicating that all systems can be regarded as efficient solvent-anti-solvent pairs. In the case of salicylamide dissolved in aqueous-4FM binary mixtures, a strong synergistic effect has been found leading to the highest solubility for 0.6 mole fraction of 4-FM.
Collapse
|
9
|
Liu J, Du X, Chen S. A Phase Inversion‐Based Microfluidic Fabrication of Helical Microfibers towards Versatile Artificial Abdominal Skin. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ji‐Dong Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing Tech University Nanjing 210009 P. R. China
| | - Xiang‐Yun Du
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing Tech University Nanjing 210009 P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing Tech University Nanjing 210009 P. R. China
| |
Collapse
|
10
|
Liu JD, Du XY, Chen S. A Phase Inversion-Based Microfluidic Fabrication of Helical Microfibers towards Versatile Artificial Abdominal Skin. Angew Chem Int Ed Engl 2021; 60:25089-25096. [PMID: 34505753 DOI: 10.1002/anie.202110888] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/03/2021] [Indexed: 12/26/2022]
Abstract
Microfluidic spinning technology (MST), incorporating microfluidics with chemical reactions, has gained considerable interest for constructing anisotropic advanced microfibers, especially helical microfibers. However, these efforts suffer from the limited material choices, restricting their applications. Here, a new phase inversion-based microfluidic spinning (PIMS) method is proposed for producing helical microfibers. This method undergoes a physicochemical phase inversion process, which is capable of efficiently manufacturing strong (tensile stress of more than 25 MPa), stretchable, flexible and biocompatible helical microfibers. The helical microfibers can be used to fabricate bi-oriented stretchable artificial abdominal skin, preventing incisional hernia formation and promoting the wound healing without conglutination. This research not only offers a universal approach to design helical microfibers but also provides a new insight into artificial skin.
Collapse
Affiliation(s)
- Ji-Dong Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Xiang-Yun Du
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| |
Collapse
|
11
|
Bonferoni MC, Caramella C, Catenacci L, Conti B, Dorati R, Ferrari F, Genta I, Modena T, Perteghella S, Rossi S, Sandri G, Sorrenti M, Torre ML, Tripodo G. Biomaterials for Soft Tissue Repair and Regeneration: A Focus on Italian Research in the Field. Pharmaceutics 2021; 13:pharmaceutics13091341. [PMID: 34575417 PMCID: PMC8471088 DOI: 10.3390/pharmaceutics13091341] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 12/22/2022] Open
Abstract
Tissue repair and regeneration is an interdisciplinary field focusing on developing bioactive substitutes aimed at restoring pristine functions of damaged, diseased tissues. Biomaterials, intended as those materials compatible with living tissues after in vivo administration, play a pivotal role in this area and they have been successfully studied and developed for several years. Namely, the researches focus on improving bio-inert biomaterials that well integrate in living tissues with no or minimal tissue response, or bioactive materials that influence biological response, stimulating new tissue re-growth. This review aims to gather and introduce, in the context of Italian scientific community, cutting-edge advancements in biomaterial science applied to tissue repair and regeneration. After introducing tissue repair and regeneration, the review focuses on biodegradable and biocompatible biomaterials such as collagen, polysaccharides, silk proteins, polyesters and their derivatives, characterized by the most promising outputs in biomedical science. Attention is pointed out also to those biomaterials exerting peculiar activities, e.g., antibacterial. The regulatory frame applied to pre-clinical and early clinical studies is also outlined by distinguishing between Advanced Therapy Medicinal Products and Medical Devices.
Collapse
Affiliation(s)
| | | | | | - Bice Conti
- Correspondence: (M.C.B.); (B.C.); (F.F.)
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Bendrea AD, Cianga L, Ailiesei GL, Ursu EL, Göen Colak D, Cianga I. 3,4-Ethylenedioxythiophene (EDOT) End-Group Functionalized Poly-ε-caprolactone (PCL): Self-Assembly in Organic Solvents and Its Coincidentally Observed Peculiar Behavior in Thin Film and Protonated Media. Polymers (Basel) 2021; 13:2720. [PMID: 34451259 PMCID: PMC8400159 DOI: 10.3390/polym13162720] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 01/05/2023] Open
Abstract
End-group functionalization of homopolymers is a valuable way to produce high-fidelity nanostructured and functional soft materials when the structures obtained have the capacity for self-assembly (SA) encoded in their structural details. Herein, an end-functionalized PCL with a π-conjugated EDOT moiety, (EDOT-PCL), designed exclusively from hydrophobic domains, as a functional "hydrophobic amphiphile", was synthesized in the bulk ROP of ε-caprolactone. The experimental results obtained by spectroscopic methods, including NMR, UV-vis, and fluorescence, using DLS and by AFM, confirm that in solvents with extremely different polarities (chloroform and acetonitrile), EDOT-PCL presents an interaction- and structure-based bias, which is strong and selective enough to exert control over supramolecular packing, both in dispersions and in the film state. This leads to the diversity of SA structures, including spheroidal, straight, and helical rods, as well as orthorhombic single crystals, with solvent-dependent shapes and sizes, confirming that EDOT-PCL behaves as a "block-molecule". According to the results from AFM imaging, an unexpected transformation of micelle-type nanostructures into single 2D lamellar crystals, through breakout crystallization, took place by simple acetonitrile evaporation during the formation of the film on the mica support at room temperature. Moreover, EDOT-PCL's propensity for spontaneous oxidant-free oligomerization in acidic media was proposed as a presumptive answer for the unexpected appearance of blue color during its dissolution in CDCl3 at a high concentration. FT-IR, UV-vis, and fluorescence techniques were used to support this claim. Besides being intriguing and unforeseen, the experimental findings concerning EDOT-PCL have raised new and interesting questions that deserve to be addressed in future research.
Collapse
Affiliation(s)
- Anca-Dana Bendrea
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore-Ghica Voda Alley, 700487 Iasi, Romania; (A.-D.B.); (E.-L.U.)
| | - Luminita Cianga
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore-Ghica Voda Alley, 700487 Iasi, Romania; (A.-D.B.); (E.-L.U.)
| | - Gabriela-Liliana Ailiesei
- NMR Spectroscopy Department, “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore-Ghica Voda Alley, 700487 Iasi, Romania;
| | - Elena-Laura Ursu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore-Ghica Voda Alley, 700487 Iasi, Romania; (A.-D.B.); (E.-L.U.)
| | - Demet Göen Colak
- Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Maslak, Istanbul 34469, Turkey;
| | - Ioan Cianga
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore-Ghica Voda Alley, 700487 Iasi, Romania; (A.-D.B.); (E.-L.U.)
| |
Collapse
|
13
|
Organic vapour permeation in amorphous and semi-crystalline rubbery membranes: Experimental data versus prediction by solubility parameters. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119211] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
14
|
Silva DF, Lima KT, Bastos GNT, Oliveira JAR, do Nascimento LAS, Costa CEF, Filho GNR, Concha VOC, Passos MF. PCL/Andiroba Oil ( Carapa guianensis Aubl.) Hybrid Film for Wound Healing Applications. Polymers (Basel) 2021; 13:1591. [PMID: 34069314 PMCID: PMC8157046 DOI: 10.3390/polym13101591] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/04/2021] [Accepted: 03/13/2021] [Indexed: 11/23/2022] Open
Abstract
Developing a biomimetic material to wound care is an emerging need for the healing process. Poly (ε-caprolactone) (PCL) is a polymer with the necessary dressing's requirements often used in medicine. Their surface, physic-chemical and biological properties can be modified by adding bioactive compounds, such as andiroba seed oil (Carapa guianensis). This Amazonian natural plant has medicinal and pharmacological properties. For this purpose, PCL polymeric films incorporated with andiroba oil were investigated. The synthesis of hybrids materials was carried out in the solvent casting method. Thermal properties were evaluated using thermogravimetric analysis (TGA/DTGA) and differential scanning calorimetry (DSC). The solvent type on the surface and hydrophilicity of samples was studied using a scanning electron microscope (SEM). Additionally, contact angle measurements, functional groups analysis, fluid absorption capacity, and cell viability were performed. The results demonstrated the influences of andiroba oil under the morphology and thermal properties of the polymeric matrix; the hydrophilicity of the hybrid film obtained by acetic acid was reduced by 13%; the porosity decreased as the concentration of oil increased, but its higher thermal stability. The L929 cell line's proliferation was observed in all materials, and it presented nontoxic nature. It was demonstrated the ability of PCL hybrid film as a matrix for cell growth. Then, the materials were proved potential candidates for biomedical applications.
Collapse
Affiliation(s)
- Debora F. Silva
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Klinsmann T. Lima
- Laboratory of Neuroinflammation, Federal University of Pará, Belém 66075-110, PA, Brazil; (K.T.L.); (G.N.T.B.)
| | - Gilmara N. T. Bastos
- Laboratory of Neuroinflammation, Federal University of Pará, Belém 66075-110, PA, Brazil; (K.T.L.); (G.N.T.B.)
| | | | - Luís Adriano S. do Nascimento
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Carlos Emmerson F. Costa
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Geraldo N. R. Filho
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Viktor O. C. Concha
- Department of Chemical Engineering, Federal University of São Paulo, Diadema 09913-030, SP, Brazil;
| | - Marcele F. Passos
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| |
Collapse
|
15
|
Wang S, Cheng M, Zhou L, Dai Y, Dang Y, Ji X. QSPR modelling for intrinsic viscosity in polymer-solvent combinations based on density functional theory. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2021; 32:379-393. [PMID: 33823697 DOI: 10.1080/1062936x.2021.1902387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Linear and nonlinear quantitative structure-property relationship (QSPR) models were developed based on a dataset with 65 polymer-solvent combinations. Seven quantum chemical descriptors, dipole moment, hardness, chemical potential, electrophilicity index, total energy, HOMO and LUMO orbital energies, were calculated with density functional theory at the B3LYP/6-31 G(d) level for polymers and solvents. Considering the strong correlation between intrinsic viscosity and weight, size, shape as well as topological structure of polymers and solvents, topological descriptors were also applied in this work. Meanwhile, the most appropriate polymer structure representation was investigated by considering 1-5 monomeric repeating units. The molecular descriptors were first screened by using the genetic algorithms-multiple linear regression (GA-MLR), with coefficient of determinations (r2) of 0.78 and 0.83 for the training set and the prediction set, respectively. The support vector machine model (SVM) model based on the selected descriptors subset showed a r2 value of 0.95 for the training set and 0.93 for the prediction set. All statistical results suggest that the established QSPR models have good predictability. Furthermore, a new test set obtained from the literature was used for further validation. The r2 values were 0.81 for the MLR model and 0.90 for the SVM model.
Collapse
Affiliation(s)
- S Wang
- Department of Chemical Engineering, Sichuan University, Chengdu, PR China
| | - M Cheng
- Department of Chemical Engineering, Sichuan University, Chengdu, PR China
| | - L Zhou
- Department of Chemical Engineering, Sichuan University, Chengdu, PR China
| | - Y Dai
- Department of Chemical Engineering, Sichuan University, Chengdu, PR China
| | - Y Dang
- Department of Chemical Engineering, Sichuan University, Chengdu, PR China
| | - X Ji
- Department of Chemical Engineering, Sichuan University, Chengdu, PR China
| |
Collapse
|
16
|
Clamor C, Cattoz BN, Wright PM, O'Reilly RK, Dove AP. Controlling the crystallinity and solubility of functional PCL with efficient post-polymerisation modification. Polym Chem 2021. [DOI: 10.1039/d0py01535k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Varying the size of an alkyl side-chain group, installed by thiol–ene addition of alkylthiols to poly(ε-allyl caprolactone), the semi-crystallinity and lipophilicity of functional PCLs could be modulated to achieve divergent physico-chemical properties.
Collapse
Affiliation(s)
- Cinzia Clamor
- School of Chemistry
- University of Birmingham
- Birmingham B15 2TT
- UK
| | | | | | | | - Andrew P. Dove
- School of Chemistry
- University of Birmingham
- Birmingham B15 2TT
- UK
| |
Collapse
|