1
|
Mohammadi SS, Shafiei SS. Electrospun biodegradable scaffolds based on poly (ε-caprolactone)/gelatin containing titanium dioxide for bone tissue engineering application; in vitro study. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2023. [DOI: 10.1080/10601325.2023.2193582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Seyedeh Shima Mohammadi
- Stem Cell and Regenerative Medicine Department, Institute of Medical Biotechnology, National Institute of Genetic Engineering & Biotechnology, Tehran, Iran
| | - Seyedeh Sara Shafiei
- Stem Cell and Regenerative Medicine Department, Institute of Medical Biotechnology, National Institute of Genetic Engineering & Biotechnology, Tehran, Iran
| |
Collapse
|
2
|
Malinowski R, Fiedurek K, Rytlewski P, Puszczykowska N, Kaczor D, Stasiek A. The structure and selected properties of poly(ε-caprolactone)-based biodegradable composites with high calcium carbonate concentration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 867:161528. [PMID: 36638989 DOI: 10.1016/j.scitotenv.2023.161528] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/03/2023] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
The article refers to new polycaprolactone (PCL) composites with high concentration of calcium carbonate (CC). The objective of the present study was the manufacturing of PCL-based biodegradable composites, containing from 24 to 75 % of CC by mass, along with analyses of changes in selected properties of the obtained PCL composites, occurring upon various amounts of CC. Importantly, in the study relatively cheap and unmodified kind of CC has been used to determine the changeover cost of produced composites. Qualitative and quantitative analyses in addition to structure analysis of the obtained composites, including the distribution of the filler particles and their average dimensions were conducted. Furthermore, the mechanical and thermal properties, mass melt flow rate and the density have been determined. Finally, a commercially important economic analysis has been presented. A significant influence of CC on the mechanical properties of PCL was found. Specifically, the reduction of its relative elongation at break and impact strength, as well as the increase of its flexural modulus and bending strength. An increase in the thermal stability of the produced composites was also observed, however the characteristic temperatures of phase transitions as well as the degree of crystallinity did not change significantly. Considering the results of the density tests, an increase in the CC content resulted in a significant decrease in the unit price of the produced composites. This is of particular application importance, because a lower cost material with new properties could be obtained.
Collapse
Affiliation(s)
- Rafał Malinowski
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 55 M. Skłodowska-Curie Street, 87-100 Toruń, Poland.
| | - Kacper Fiedurek
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 55 M. Skłodowska-Curie Street, 87-100 Toruń, Poland
| | - Piotr Rytlewski
- Faculty of Materials Engineering, Kazimierz Wielki University, 30 Chodkiewicza Street, 85-064 Bydgoszcz, Poland
| | - Natalia Puszczykowska
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 55 M. Skłodowska-Curie Street, 87-100 Toruń, Poland
| | - Daniel Kaczor
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 55 M. Skłodowska-Curie Street, 87-100 Toruń, Poland
| | - Andrzej Stasiek
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 55 M. Skłodowska-Curie Street, 87-100 Toruń, Poland
| |
Collapse
|
3
|
Yang Y, Zhang C, Gong M, Zhan Y, Yu Z, Shen C, Zhang Y, Yu L, Chen Z. Integrated photo-inspired antibacterial polyvinyl alcohol/carboxymethyl cellulose hydrogel dressings for pH real-time monitoring and accelerated wound healing. Int J Biol Macromol 2023; 238:124123. [PMID: 36963550 DOI: 10.1016/j.ijbiomac.2023.124123] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/16/2023] [Accepted: 03/17/2023] [Indexed: 03/26/2023]
Abstract
Recurrent infection of chronic wounds remains a major clinical challenge. Recently, the hydrogel antibacterial materials have attracted extensive attention for preventing infection in wound healing. In this study, a hybrid hydrogel made of polyvinyl alcohol - iodine (PAI), sodium carboxymethyl cellulose (CMC), and carbamino quantum dot (CQDs) was prepared by the cross-linking of hydrogen bonds, named as polyvinyl alcohol‑iodine/sodium carboxymethyl cellulose/carbon quantum dots (PAI/CMC/CQDs). The composite hydrogels exhibited the outstanding photothermal conversion efficiency with near infrared (NIR) light irradiation, and the high antibacterial activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Meanwhile, the elevated temperature of the composite hydrogels up to ~45 °C was able to stimulate the migration of epidermal cell to accelerate skin repair. Given that PAI and CQDs could respond to different pH values (5-8), the real-time would pH information was provided by the visible light and fluorescent light dual monitoring system by naked eye. Moreover, the visible-fluorescent images could be collected and transformed into RGB signals to quantify the would pH levels, avoiding secondary injuries caused by frequent dressing changes. PAI/CMC/CQDs was demonstrated the significant therapeutic effect on chronic wounds by eliminating bacterial infections and promoting skin repair under the smart RGB monitoring system.
Collapse
Affiliation(s)
- Yuanyuan Yang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Chong Zhang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Ming Gong
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Yuan Zhan
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Zhenkun Yu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Chang Shen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yuhong Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Li Yu
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China.
| | - Zhaoxia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| |
Collapse
|
4
|
Heng BC, Bai Y, Li X, Meng Y, Lu Y, Zhang X, Deng X. The bioelectrical properties of bone tissue. Animal Model Exp Med 2023; 6:120-130. [PMID: 36856186 PMCID: PMC10158952 DOI: 10.1002/ame2.12300] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/18/2022] [Indexed: 03/02/2023] Open
Abstract
Understanding the bioelectrical properties of bone tissue is key to developing new treatment strategies for bone diseases and injuries, as well as improving the design and fabrication of scaffold implants for bone tissue engineering. The bioelectrical properties of bone tissue can be attributed to the interaction of its various cell lineages (osteocyte, osteoblast and osteoclast) with the surrounding extracellular matrix, in the presence of various biomechanical stimuli arising from routine physical activities; and is best described as a combination and overlap of dielectric, piezoelectric, pyroelectric and ferroelectric properties, together with streaming potential and electro-osmosis. There is close interdependence and interaction of the various electroactive and electrosensitive components of bone tissue, including cell membrane potential, voltage-gated ion channels, intracellular signaling pathways, and cell surface receptors, together with various matrix components such as collagen, hydroxyapatite, proteoglycans and glycosaminoglycans. It is the remarkably complex web of interactive cross-talk between the organic and non-organic components of bone that define its electrophysiological properties, which in turn exerts a profound influence on its metabolism, homeostasis and regeneration in health and disease. This has spurred increasing interest in application of electroactive scaffolds in bone tissue engineering, to recapitulate the natural electrophysiological microenvironment of healthy bone tissue to facilitate bone defect repair.
Collapse
Affiliation(s)
- Boon Chin Heng
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, PR China.,Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, PR China.,School of Medical and Life Sciences, Sunway University, Subang Jaya, Malaysia
| | - Yunyang Bai
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Xiaochan Li
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Yanze Meng
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Yanhui Lu
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Xuehui Zhang
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, PR China.,National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, NMPA Key Laboratory for Dental Materials, Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Xuliang Deng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, PR China.,National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, NMPA Key Laboratory for Dental Materials, Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| |
Collapse
|
5
|
Mallakpour S, Mohammadi N. Development of sodium alginate-pectin/TiO2 nanocomposites: Antibacterial and bioactivity investigations. Carbohydr Polym 2022; 285:119226. [DOI: 10.1016/j.carbpol.2022.119226] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/01/2022] [Accepted: 02/03/2022] [Indexed: 12/18/2022]
|
6
|
Christ B, Glaubitt W, Berberich K, Weigel T, Probst J, Sextl G, Dembski S. Sol-Gel-Derived Fibers Based on Amorphous α-Hydroxy-Carboxylate-Modified Titanium(IV) Oxide as a 3-Dimensional Scaffold. MATERIALS 2022; 15:ma15082752. [PMID: 35454448 PMCID: PMC9024846 DOI: 10.3390/ma15082752] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/01/2022] [Accepted: 04/06/2022] [Indexed: 12/02/2022]
Abstract
The development of novel fibrous biomaterials and further processing of medical devices is still challenging. For instance, titanium(IV) oxide is a well-established biocompatible material, and the synthesis of TiOx particles and coatings via the sol-gel process has frequently been published. However, synthesis protocols of sol-gel-derived TiOx fibers are hardly known. In this publication, the authors present a synthesis and fabrication of purely sol-gel-derived TiOx fiber fleeces starting from the liquid sol-gel precursor titanium ethylate (TEOT). Here, the α-hydroxy-carboxylic acid lactic acid (LA) was used as a chelating ligand to reduce the reactivity towards hydrolysis of TEOT enabling a spinnable sol. The resulting fibers were processed into a non-woven fleece, characterized with FTIR, 13C-MAS-NMR, XRD, and screened with regard to their stability in physiological solution. They revealed an unexpected dependency between the LA content and the dissolution behavior. Finally, in vitro cell culture experiments proved their potential suitability as an open-mesh structured scaffold material, even for challenging applications such as therapeutic medicinal products (ATMPs).
Collapse
Affiliation(s)
- Bastian Christ
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
- Correspondence:
| | - Walther Glaubitt
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Katrin Berberich
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Tobias Weigel
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Jörn Probst
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Gerhard Sextl
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
- Department Chemical Technology of Material Synthesis, University Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Sofia Dembski
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
- Department Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| |
Collapse
|
7
|
Bicak B, Kecel-Gunduz S, Budama-Kilinc Y, Ozdemir B. Molecular docking studies of YKT tripeptide and drug delivery system with poly(ε-caprolactone) nanoparticles. Arch Pharm (Weinheim) 2022; 355:e2100437. [PMID: 35150004 DOI: 10.1002/ardp.202100437] [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: 11/07/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 11/08/2022]
Abstract
Tyrosyllysylthreonine (YKT) is a peptide structure that contains three different amino acids in its structure and has anticancer properties. The main purpose of this study is to reveal the structural interactions of the peptide and to increase the efficiency of the peptide with nanoformulation. For these purposes, YKT-loaded poly(ε-caprolactone) (PCL) nanoparticles (NPs) were synthesized using the double-emission precipitation method and the obtained NPs were characterized with a Zeta Sizer, UV-Vis, Fourier transform infrared-attenuated total reflection spectrometers, scanning electron microscopy, and transmission electron microscopy. The in vitro release profile of the peptide-loaded PCL NPs was determined. In molecular modeling studies, PCL, PCL-polyvinyl alcohol (PVA), and PCL-PVA-YKT systems were simulated in an aqueous medium by molecular dynamics simulations, separately. The information about the interactions between the YKT tripeptide and the epidermal growth factor and androgen, estrogen, and progesterone receptors were obtained with the molecular docking study. Additionally, the ADME profile of YKT was determined as a result of each docking study. In conclusion, tripeptide-based nanodrug development studies of the YKT tripeptide are presented in this study.
Collapse
Affiliation(s)
- Bilge Bicak
- Department of Physics, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Serda Kecel-Gunduz
- Department of Physics, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Yasemin Budama-Kilinc
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey
| | - Burak Ozdemir
- Department of Bioengineering, Graduate School of Natural and Applied Science, Yildiz Technical University, İstanbul, Turkey
| |
Collapse
|
8
|
Parhi B, Bharatiya D, Swain SK. Effect of polycaprolactone on physicochemical, biological, and mechanical properties of polyethylene oxide and polyamino acids nano block copolymers. J Appl Polym Sci 2022. [DOI: 10.1002/app.52116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Biswajit Parhi
- Department of Chemistry Veer Surendra Sai University of Technology Sambalpur India
| | - Debasrita Bharatiya
- Department of Chemistry Veer Surendra Sai University of Technology Sambalpur India
| | - Sarat K. Swain
- Department of Chemistry Veer Surendra Sai University of Technology Sambalpur India
| |
Collapse
|
9
|
Abudihani M, Yu Y, Wang Q, Miao L. Preparation of Mg/PCL electrospun membranes and preliminary study. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2021. [DOI: 10.1680/jbibn.21.00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Magnesium (Mg) metal and its alloy degradation product magnesium ion (Mg2+) can stimulate the metabolic activity of bone cells, which is beneficial to bone growth and healing. With biodegradable polycaprolactone (PCL) and magnesium particles as raw materials, electrospinning technology is used to prepare electrospun membrane materials doped with magnesium particles. Meanwhile, the scanning electron microscope, X-ray diffraction analysis technology and microcomputer-controlled electronic universal testing machine are adopted to analyze the physical and chemical properties of the material. The biocompatibility of electrospun membranes and their potential to induce osteogenic differentiation of human dental pulp stem cells (hDPSCs) were evaluated by in vitro cell experiments. The results showed that magnesium/PCL electrospun membranes doped with magnesium particles were successfully prepared with electrospinning technology, and the material has a good porous structure. Magnesium/PCL electrospun membranes have good biocompatibility and have the potential to induce osteogenic differentiation of hDPSCs. Among them, the effects of 10% magnesium/PCL electrospun membranes were the most obvious. Clinically, these materials provide new ideas for the restoration of alveolar bone defects and provide an experimental basis for the realization of alveolar bone regeneration.
Collapse
Affiliation(s)
- Maheshati Abudihani
- Department of Cariology and Endodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yijun Yu
- Department of Cariology and Endodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Qingqing Wang
- Department of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Leiying Miao
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| |
Collapse
|
10
|
Luyt AS, Antunes A, Popelka A, Mahmoud A, Hassan MK, Kasak P. Effect of poly(ε‐caprolactone) and titanium (
IV
) dioxide content on the
UV
and hydrolytic degradation of poly(lactic acid)/poly(ε‐caprolactone) blends. J Appl Polym Sci 2021. [DOI: 10.1002/app.51266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Ana Antunes
- Center for Advanced Materials Qatar University Doha Qatar
| | - Anton Popelka
- Center for Advanced Materials Qatar University Doha Qatar
| | | | | | - Peter Kasak
- Center for Advanced Materials Qatar University Doha Qatar
| |
Collapse
|
11
|
Stroea L, Chibac-Scutaru AL, Melinte V. Aliphatic Polyurethane Elastomers Quaternized with Silane-Functionalized TiO 2 Nanoparticles with UV-Shielding Features. Polymers (Basel) 2021; 13:1318. [PMID: 33923812 PMCID: PMC8074198 DOI: 10.3390/polym13081318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022] Open
Abstract
The design of high-performance nanocomposites with improved mechanical, thermal or optical properties compared to starting polymers has generated special interest due to their use in a wide range of targeted applications. In the present work, polymer nanocomposites composed of polyurethane elastomers based on polycaprolactone or polycaprolactone/poly(ethylene glycol) soft segments and titanium dioxide (TiO2) nanoparticles as an inorganic filler were prepared and characterized. Initially, the surface of TiO2 nanoparticles was modified with (3-iodopropyl) trimethoxysilane as a coupling agent, and thereafter, the tertiary amine groups from polyurethane hard segments were quaternized with the silane-modified TiO2 nanoparticles in order to ensure covalent binding of the nanoparticles on the polymeric chains. In the preparation of polymer nanocomposites, two quaternization degrees were taken into account (1/1 and 1/0.5 molar ratios), and the resulting nanocomposite coatings were characterized by various methods (Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, contact angle, thermogravimetric analysis, dynamic mechanical thermal analysis). The mechanical parameters of the samples evaluated by tensile testing confirm the elastomeric character of the polyurethanes and of the corresponding composites, indicating the obtaining of highly flexible materials. The absorbance/transmittance measurements of PU/TiO2 thin films in the wavelength range of 200-700 nm show that these partially block UV-A radiation and all UV-B radiation from sunlight and could possibly be used as UV-protective elastomeric coatings.
Collapse
Affiliation(s)
| | | | - Violeta Melinte
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (L.S.); (A.-L.C.-S.)
| |
Collapse
|
12
|
Morphological and Mechanical Properties of Electrospun Polycaprolactone Scaffolds: Effect of Applied Voltage. Polymers (Basel) 2021; 13:polym13040662. [PMID: 33672211 PMCID: PMC7926916 DOI: 10.3390/polym13040662] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 12/15/2022] Open
Abstract
The aim of this work is to investigate the effect of the applied voltage on the morphological and mechanical properties of electrospun polycaprolactone (PCL) scaffolds for potential use in tissue engineering. The morphology of the scaffolds was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), and the BET techniques for measuring the surface area and pore volume. Stress-strain curves from tensile tests were obtained for estimating the mechanical properties. Additional studies for detecting changes in the chemical structure of the electrospun PCL scaffolds by Fourier transform infrared were performed, while contact angle and X-ray diffraction analysis were realized for determining the wettability and crystallinity, respectively. The SEM, AFM and BET results demonstrate that the electrospun PCL fibers exhibit morphological changes with the applied voltage. By increasing the applied voltage (10 to 25 kV) a significate influence was observed on the fiber diameter, surface roughness, and pore volume. In addition, tensile strength, elongation, and elastic modulus increase with the applied voltage, the crystalline structure of the fibers remains constant, and the surface area and wetting of the scaffolds diminish. The morphological and mechanical properties show a clear correlation with the applied voltage and can be of great relevance for tissue engineering.
Collapse
|
13
|
Fabrication and characterization of core–shell TiO2-containing nanofibers of PCL-zein by coaxial electrospinning method as an erythromycin drug carrier. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03591-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
14
|
Zheng T, Huang Y, Zhang X, Cai Q, Deng X, Yang X. Mimicking the electrophysiological microenvironment of bone tissue using electroactive materials to promote its regeneration. J Mater Chem B 2020; 8:10221-10256. [PMID: 33084727 DOI: 10.1039/d0tb01601b] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The process of bone tissue repair and regeneration is complex and requires a variety of physiological signals, including biochemical, electrical and mechanical signals, which collaborate to ensure functional recovery. The inherent piezoelectric properties of bone tissues can convert mechanical stimulation into electrical effects, which play significant roles in bone maturation, remodeling and reconstruction. Electroactive materials, including conductive materials, piezoelectric materials and electret materials, can simulate the physiological and electrical microenvironment of bone tissue, thereby promoting bone regeneration and reconstruction. In this paper, the structures and performances of different types of electroactive materials and their applications in the field of bone repair and regeneration are reviewed, particularly by providing the results from in vivo evaluations using various animal models. Their advantages and disadvantages as bone repair materials are discussed, and the methods for tuning their performances are also described, with the aim of providing an up-to-date account of the proposed topics.
Collapse
Affiliation(s)
- Tianyi Zheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Yiqian Huang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Xuehui Zhang
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Qing Cai
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Xuliang Deng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Xiaoping Yang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| |
Collapse
|
15
|
Singh J, Kaur T, Singh N, Pandey PM. Biological and mechanical characterization of biodegradable carbonyl iron powder/polycaprolactone composite material fabricated using three-dimensional printing for cardiovascular stent application. Proc Inst Mech Eng H 2020; 234:975-987. [DOI: 10.1177/0954411920936055] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Biological and mechanical properties of biodegradable polymeric composite materials are strongly influenced by the choice of appropriate reinforcement in the polymer matrix. Non-compatibility of material in the vascular system could obstruct the way of the biological fluids. The concept of development of polymeric composite material for vascular implants is to provide enough support to the vessel and to restore the vessel in the natural state after degradation. In this research, the polycaprolactone composite materials (carbonyl iron powder/polycaprolactone) were developed by reinforcement of the 0%–2% of carbonyl iron powder using the solvent cast three-dimensional printing technique. The physicochemical properties of developed composites were characterized in conjunction with mechanical and biological properties. The mechanical characterizations were assessed by uniaxial tensile testing as well as flexibility testing. The results of mechanical testing assured that carbonyl iron powder/polycaprolactone composites have shown desirable properties for vascular implants. Besides the mechanical characterization, in vitro biological investigations of carbonyl iron powder/polycaprolactone were done for analyzing blood compatibility and cytocompatibility. The results revealed that the materials developed were biocompatible, less hemolytic, and having non-thrombogenic properties indicating the promising applications in the field of cardiovascular applications.
Collapse
Affiliation(s)
- Jasvinder Singh
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Tejinder Kaur
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Neetu Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Pulak Mohan Pandey
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| |
Collapse
|
16
|
Cytotoxicity and hemostatic activity of chitosan/carrageenan composite wound healing dressing for traumatic hemorrhage. Carbohydr Polym 2020; 239:116106. [PMID: 32414437 DOI: 10.1016/j.carbpol.2020.116106] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 02/07/2020] [Accepted: 03/01/2020] [Indexed: 11/22/2022]
Abstract
Hemorrhage remains a big threat to trauma patients, especially in combat fields. Therefore, we formulated a biocompatible and biopolymer based chitosan/carrageenan composite dressing. This dressing was fabricated using freeze-drying that will serve as a promising material to promote hemostasis and tissue growth required during hemorrhage. The efficacy of dressing was evaluated for its physiochemical analysis, surface morphology, and biodegradability. Further, human dermal fibroblast cells were seeded on dressing and demonstrated non-toxic effects on the cells by showing enhanced cell attachment and proliferation. In vitro hemostatic properties of the dressing were analyzed by human Thrombin-Antithrombin assay. The dressing formed showed steady blood coagulation implying red blood cells and platelet adhesion that helped in thrombin formation, which is responsible for enhancing wound healing. Thus, it is concluded that the composite dressing can be a potent combination to accelerate hemostatic activity against hemorrhage and promote tissue growth for effective wound healing.
Collapse
|
17
|
del Ángel-Sánchez K, Borbolla-Torres CI, Palacios-Pineda LM, Ulloa-Castillo NA, Elías-Zúñiga A. Development, Fabrication, and Characterization of Composite Polycaprolactone Membranes Reinforced with TiO 2 Nanoparticles. Polymers (Basel) 2019; 11:polym11121955. [PMID: 31795142 PMCID: PMC6960811 DOI: 10.3390/polym11121955] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 11/25/2019] [Accepted: 11/27/2019] [Indexed: 11/29/2022] Open
Abstract
This paper focuses on developing, fabricating, and characterizing composite polycaprolactone (PCL) membranes reinforced with titanium dioxide nanoparticles (NPs) elaborated by using two solvents; acetic acid and a mixture of chloroform and N,N-dimethylformamide (DMF). The resulting physical, chemical, and mechanical properties of the composite materials are studied by using experimental characterization techniques such as scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) analysis, contact angle (CA), uniaxial and biaxial tensile tests, and surface roughness measurements. Experimental results show that the composite material synthesized by sol-gel and chloroform-DMF has a better performance than the one obtained by using acetic acid as a solvent.
Collapse
Affiliation(s)
- Karina del Ángel-Sánchez
- Departamento de Ingeniería Mecánica y Materiales Avanzados, Tecnologico de Monterrey, School of Engineering and Science. Av. E. Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico; (K.d.Á.-S.); (C.I.B.-T.); (N.A.U.-C.)
| | - César I. Borbolla-Torres
- Departamento de Ingeniería Mecánica y Materiales Avanzados, Tecnologico de Monterrey, School of Engineering and Science. Av. E. Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico; (K.d.Á.-S.); (C.I.B.-T.); (N.A.U.-C.)
| | - Luis M. Palacios-Pineda
- Departamento de Ingeniería Mecánica y Materiales Avanzados, Tecnologico de Monterrey, School of Engineering and Science. Av. E. Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico; (K.d.Á.-S.); (C.I.B.-T.); (N.A.U.-C.)
- Tecnológico Nacional de México/Instituto Tecnológico de Pachuca, Pachuca, Hidalgo 42082, Mexico;
| | - Nicolás A. Ulloa-Castillo
- Departamento de Ingeniería Mecánica y Materiales Avanzados, Tecnologico de Monterrey, School of Engineering and Science. Av. E. Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico; (K.d.Á.-S.); (C.I.B.-T.); (N.A.U.-C.)
| | - Alex Elías-Zúñiga
- Departamento de Ingeniería Mecánica y Materiales Avanzados, Tecnologico de Monterrey, School of Engineering and Science. Av. E. Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico; (K.d.Á.-S.); (C.I.B.-T.); (N.A.U.-C.)
- Correspondence: ; Tel.: +52-(81)8358-2000 (ext. 5430)
| |
Collapse
|
18
|
Homocianu M, Pascariu P. Electrospun Polymer-Inorganic Nanostructured Materials and Their Applications. POLYM REV 2019. [DOI: 10.1080/15583724.2019.1676776] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Petronela Pascariu
- “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
- Faculty of Electrical Engineering and Computer Science & MANSiD Research Center, Stefan cel Mare University, Suceava, Romania
| |
Collapse
|
19
|
Rezk AI, Lee JY, Son BC, Park CH, Kim CS. Bi-layered Nanofibers Membrane Loaded with Titanium Oxide and Tetracycline as Controlled Drug Delivery System for Wound Dressing Applications. Polymers (Basel) 2019; 11:polym11101602. [PMID: 31581516 PMCID: PMC6836055 DOI: 10.3390/polym11101602] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/20/2019] [Accepted: 09/30/2019] [Indexed: 12/19/2022] Open
Abstract
The aim of this study is to develop a novel functional bi-layered membrane loaded titanium oxide (TiO2) and tetracycline (TTC) for application in wound dressing. The advantages of the electrospinning technique have to be considered for the uniform distribution of nanoparticles and TTC drug. The as prepared nanofibers and TiO2 were characterized in terms of morphology, fiber diameter, mechanical properties and surface wettability. The in vitro drug release study revealed initial burst release followed by a sustained control release of TTC for 4 days. The in vitro antibacterial of the bi-layered nanofibers was conducted against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria species showing excellent antibacterial effect for drug loaded samples compared with PCL nanofibers. Subsequently, cell counting kit-8 (CCK-8) and confocal laser scanning microscopy (CLSM) were used to evaluate its biocompatibility in vitro. Our results revealed that the bi-layered membrane has better antibacterial and cell compatibility than the control fiber. This suggests that the fabricated biocompatible scaffold is appropriate for a variety of wound dressing applications.
Collapse
Affiliation(s)
- Abdelrahman I. Rezk
- Department of Bionanosystem Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea; (A.I.R.); (B.C.S.)
| | - Ji Yeon Lee
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea;
| | - Byeong Cheol Son
- Department of Bionanosystem Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea; (A.I.R.); (B.C.S.)
| | - Chan Hee Park
- Department of Bionanosystem Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea; (A.I.R.); (B.C.S.)
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea;
- Correspondence: (C.H.P.); (C.S.K.); Tel.: +82-63-270-4284 (C.S.K.); Fax: +82-63-270-2460 (C.S.K.)
| | - Cheol Sang Kim
- Department of Bionanosystem Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea; (A.I.R.); (B.C.S.)
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju, Jeonbuk 561-756, Korea;
- Correspondence: (C.H.P.); (C.S.K.); Tel.: +82-63-270-4284 (C.S.K.); Fax: +82-63-270-2460 (C.S.K.)
| |
Collapse
|
20
|
Gandolfi MG, Zamparini F, Degli Esposti M, Chiellini F, Fava F, Fabbri P, Taddei P, Prati C. Highly porous polycaprolactone scaffolds doped with calcium silicate and dicalcium phosphate dihydrate designed for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:341-361. [PMID: 31147007 DOI: 10.1016/j.msec.2019.04.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 01/31/2019] [Accepted: 04/12/2019] [Indexed: 01/24/2023]
Abstract
Polycaprolactone (PCL), dicalcium phosphate dihydrate (DCPD) and/or calcium silicates (CaSi) have been used to prepare highly porous scaffolds by thermally induced phase separation technique (TIPS). Three experimental mineral-doped formulations were prepared (PCL-10CaSi, PCL-5CaSi-5DCPD, PCL-10CaSi-10DCPD); pure PCL scaffolds constituted the control group. Scaffolds were tested for their chemical-physical and biological properties, namely thermal properties by differential scanning calorimetry (DSC), mechanical properties by quasi-static parallel-plates compression testing, porosity by a standard water-absorption method calcium release, alkalinizing activity, surface microchemistry and micromorphology by Environmental Scanning electronic Microscopy (ESEM), apatite-forming ability in Hank Balanced Saline Solution (HBSS) by Energy Dispersive X-ray Spectroscopy (EDX) and micro-Raman, and direct contact cytotoxicity. All mineral-doped scaffolds released calcium and alkalinized the soaking medium, which may favor a good biological (osteogenic) response. ESEM surface micromorphology analyses after soaking in HBSS revealed: pure PCL, PCL-10CaSi and PCL-10CaSi-10DCPD kept similar surface porosity percentages but different pore shape modifications. PCL-5CaSi-5DCPD revealed a significant surface porosity increase despite calcium phosphates nucleation (p < 0.05). Micro-Raman spectroscopy detected the formation of a B-type carbonated apatite (Ap) layer on the surface of PCL-10CaSi-10DCPD aged for 28 days in HBSS; a similar phase (but of lower thickness) formed also on PCL-5CaSi-5DCPD and PCL; the deposit formed on PCL-10CaSi was mainly composed of calcite. All PCL showed bulk open porosity higher than 94%; however, no relevant brittleness was observed in the materials, which retained the possibility to be handled without collapsing. The thermo-mechanical properties showed that the reinforcing and nucleating action of the inorganic fillers CaSi and DCPD improved viscoelastic properties of the scaffolds, as confirmed by the increased value of storage modulus and the slight increase in the crystallization temperature for all the biomaterials. A detrimental effect on the mechanical properties was observed in samples with the highest amount of inorganic particles (PCL-10CaSi-10DCPD). All the scaffolds showed absence of toxicity, in particular PCL-10CaSi-10DCPD. The designed scaffolds are biointeractive (release biologically relevant ions), nucleate apatite, possess high surface and internal open porosity and can be colonized by cells, creating a bone forming osteoblastic microenvironment and appearing interesting materials for bone regeneration purposes.
Collapse
Affiliation(s)
- Maria Giovanna Gandolfi
- Laboratory of Biomaterials and Oral Pathology, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
| | - Fausto Zamparini
- Laboratory of Biomaterials and Oral Pathology, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; Endodontic Clinical Section, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Micaela Degli Esposti
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Federica Chiellini
- BIOlab Research Group, Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy
| | - Fabio Fava
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Paola Fabbri
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Paola Taddei
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Carlo Prati
- Endodontic Clinical Section, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| |
Collapse
|
21
|
Surmenev RA, Shkarina S, Syromotina DS, Melnik EV, Shkarin R, Selezneva II, Ermakov AM, Ivlev SI, Cecilia A, Weinhardt V, Baumbach T, Rijavec T, Lapanje A, Chaikina MV, Surmeneva MA. Characterization of biomimetic silicate- and strontium-containing hydroxyapatite microparticles embedded in biodegradable electrospun polycaprolactone scaffolds for bone regeneration. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
22
|
Khan I, Nagarjuna R, Dutta JR, Ganesan R. Enzyme-Embedded Degradation of Poly(ε-caprolactone) using Lipase-Derived from Probiotic Lactobacillus plantarum. ACS OMEGA 2019; 4:2844-2852. [PMID: 31459515 PMCID: PMC6648548 DOI: 10.1021/acsomega.8b02642] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 01/09/2019] [Indexed: 05/08/2023]
Abstract
Enzyme-embedded polymer degradation was reported to be an attractive alternative approach to the conventional surface pouring method for efficient degradation of polymers using fungal-derived enzyme Candida antarctica lipase B. Despite the enormous potential, this approach is still in its infancy. In the present study, a probiotic lipase obtained from Lactobacillus plantarum has been employed for the first time to study the enzyme-embedded polymer degradation approach using poly(ε-caprolactone) (PCL) as the semicrystalline polymer candidate. PCL films embedded with 2 to 8 wt % lipase are studied under static conditions for their enzymatic degradation up to 8 days of incubation. Thermogravimetric analyses (TGA) have shown a clear trend in decreasing thermal stability of the polymer with increasing lipase content and number of incubation days. Differential thermal analyses have revealed that the percentage crystallinity of the leftover PCL films increases with progress in enzymatic degradation because of the efficient action of lipase over the amorphous regions of the films. Thus, the higher lipase loading in the PCL matrix and more number of incubation days have resulted in higher percentage crystallinity in the leftover PCL films, which has further been corroborated by X-ray diffraction analyses. In a similar line, higher percentage mass loss of the PCL films has been observed with increased enzyme loading and number of incubation days. Field emission scanning electron microscopy (FE-SEM) has been employed to follow the surface and cross-sectional morphologies of the polymer films, which has revealed micron-scale pores on the surface as well as a bulk polymer matrix with progress in enzymatic polymer degradation. Additionally, FE-SEM studies have revealed the efficient enzyme-catalyzed hydrolysis of the polymer matrix in a three-dimensional fashion, which is unique to this approach. In addition to the first-time utility of a probiotic lipase for the embedded polymer degradation approach, the present work provides insight into the PCL degradation under static and ambient temperature conditions with no replenishment of enzymes.
Collapse
Affiliation(s)
- Imran Khan
- Department
of Biological Sciences and Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India
| | - Ravikiran Nagarjuna
- Department
of Biological Sciences and Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India
| | - Jayati Ray Dutta
- Department
of Biological Sciences and Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India
- E-mail: (J.R.D.)
| | - Ramakrishnan Ganesan
- Department
of Biological Sciences and Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India
- E-mail: (R.G.)
| |
Collapse
|
23
|
Electrospun Polycaprolactone Fibrous Membranes Containing Ag, TiO₂ and Na₂Ti₆O 13 Particles for Potential Use in Bone Regeneration. MEMBRANES 2019; 9:membranes9010012. [PMID: 30634630 PMCID: PMC6359384 DOI: 10.3390/membranes9010012] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 12/19/2018] [Accepted: 01/03/2019] [Indexed: 11/17/2022]
Abstract
Biocompatible and biodegradable membrane treatments for regeneration of bone are nowadays a promising solution in the medical field. Bioresorbable polymers are extensively used in membrane elaboration, where polycaprolactone (PCL) is used as base polymer. The goal of this work was to improve electrospun membranes’ biocompatibility and antibacterial properties by adding micro- and nanoparticles such as Ag, TiO2 and Na2Ti6O13. Micro/nanofiber morphologies of the obtained membranes were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, energy-dispersive X-ray spectroscopy and a tensile test. Also, for this study optical microscopy was used to observe DAPI-stained cells. Membranes of the different systems were electrospun to an average diameter of 1.02–1.76 μm. To evaluate the biological properties, cell viability was studied by growing NIH/3T3 cells on the microfibers. PCL/TiO2 strength was enhanced from 0.6 MPa to 6.3 MPa in comparison with PCL without particles. Antibacterial activity was observed in PCL/TiO2 and PCL/Na2Ti6O13 electrospun membranes using Staphylococcus aureus bacteria. Bioactivity of the membranes was confirmed with simulated body fluid (SBF) treatment. From this study, the ceramic particles TiO2 and Na2Ti6O13, combined with a PCL matrix with micro/nanoparticles, enhanced cell proliferation, adhesion and antibacterial properties. The electrospun composite with Na2Ti6O13 can be considered viable for tissue regenerative processes.
Collapse
|
24
|
Thermal Properties and Non-Isothermal Crystallization Kinetics of Poly (δ-Valerolactone) and Poly (δ-Valerolactone)/Titanium Dioxide Nanocomposites. CRYSTALS 2018. [DOI: 10.3390/cryst8120452] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
New poly (δ-valerolactone)/titanium dioxide (PDVL/TiO2) nanocomposites with different TiO2 nanoparticle loadings were prepared by the solvent-casting method and characterized by Fourier transform infra-red, differential scanning calorimetry, X-ray diffraction and scanning electron microscopy, and thermogravimetry analyses. The results obtained reveal good dispersion of TiO2 nanoparticles in the polymer matrix and non-formation of new crystalline structures indicating the stability of the crystallinity of TiO2 in the composite. A significant increase in the degree of crystallinity was observed with increasing TiO2 content. The non-isothermal crystallization kinetics of the PDVL/TiO2 system indicate that the crystallization process involves the simultaneous occurrence of two- and three-dimensional spherulitic growths. The thermal degradation analysis of this nanocomposite reveals a significant improvement in the thermal stability with increasing TiO2 loading.
Collapse
|
25
|
Augustine R, Dalvi YB, Dan P, George N, Helle D, Varghese R, Thomas S, Menu P, Sandhyarani N. Nanoceria Can Act as the Cues for Angiogenesis in Tissue-Engineering Scaffolds: Toward Next-Generation in Situ Tissue Engineering. ACS Biomater Sci Eng 2018; 4:4338-4353. [DOI: 10.1021/acsbiomaterials.8b01102] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Robin Augustine
- Nanoscience Research Laboratory, School of Nano Science and Technology, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| | - Yogesh B. Dalvi
- Pushpagiri Research Centre, Pushpagiri Institute of Medical Sciences, Tiruvalla, Kerala 689101, India
| | - Pan Dan
- UMR 7365 CNRS - Université de Lorraine, Ingénierie Moléculaire et Physiopathologie Articulaire, Vandoeuvre-lès Nancy, F54500, France
| | - Nebu George
- Pushpagiri Research Centre, Pushpagiri Institute of Medical Sciences, Tiruvalla, Kerala 689101, India
| | - Debora Helle
- UMR 7365 CNRS - Université de Lorraine, Ingénierie Moléculaire et Physiopathologie Articulaire, Vandoeuvre-lès Nancy, F54500, France
| | - Ruby Varghese
- Pushpagiri Research Centre, Pushpagiri Institute of Medical Sciences, Tiruvalla, Kerala 689101, India
| | - Sabu Thomas
- International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala 686560, India
| | - Patrick Menu
- UMR 7365 CNRS - Université de Lorraine, Ingénierie Moléculaire et Physiopathologie Articulaire, Vandoeuvre-lès Nancy, F54500, France
| | - Neelakandapillai Sandhyarani
- Nanoscience Research Laboratory, School of Nano Science and Technology, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| |
Collapse
|
26
|
Biranje SS, Madiwale PV, Patankar KC, Chhabra R, Dandekar-Jain P, Adivarekar RV. Hemostasis and anti-necrotic activity of wound-healing dressing containing chitosan nanoparticles. Int J Biol Macromol 2018; 121:936-946. [PMID: 30342937 DOI: 10.1016/j.ijbiomac.2018.10.125] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 10/04/2018] [Accepted: 10/15/2018] [Indexed: 02/07/2023]
Abstract
Necrotic tissues are the dead tissues present in the wounded areas, which need to be removed for rapid wound healing. Various biopolymer-based dressings have been exploited to heal infected wounds, but with limited success. In a quest to develop an effective and economic wound dressing, a biodegradable dressing containing chitosan nanoparticles has been successfully developed. Chitosan nanoparticles were prepared by ionic gelation method and then assembled into the porous chitosan dressing, by lyophilization. The resulting dressing was analyzed for morphology, porosity, pore volume, surface area and biodegradability. Higher surface area and porosity of the dressing facilitated its partial biodegradation by enzymatic action. In vitro cellular investigations with Human Dermal Fibroblasts (HDF) confirmed the safety of the dressing for wound healing applications. Human Thrombin-Antithrombin (TAT) based in vitro ELISA assay, for evaluating the hemostasis activity, illustrated an accelerated hemostasis activity, through higher thrombin generation and stable blood clot formation. The blood in contact with the dressing contained two-fold higher levels of TAT, as compared to that in contact with the TAT standard. Our results suggest the potential of the developed dressing for removing the necrotic tissues and accelerating the hemostasis activity, for efficient and rapid wound healing.
Collapse
Affiliation(s)
- Santosh S Biranje
- Department of Fibres and Textile Processing Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Pallavi V Madiwale
- Department of Fibres and Textile Processing Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Kaustubh C Patankar
- Department of Fibres and Textile Processing Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Rohan Chhabra
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Prajakta Dandekar-Jain
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Ravindra V Adivarekar
- Department of Fibres and Textile Processing Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India.
| |
Collapse
|
27
|
3D biodegradable scaffolds of polycaprolactone with silicate-containing hydroxyapatite microparticles for bone tissue engineering: high-resolution tomography and in vitro study. Sci Rep 2018; 8:8907. [PMID: 29891842 PMCID: PMC5995873 DOI: 10.1038/s41598-018-27097-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 05/30/2018] [Indexed: 01/19/2023] Open
Abstract
To date, special interest has been paid to composite scaffolds based on polymers enriched with hydroxyapatite (HA). However, the role of HA containing different trace elements such as silicate in the structure of a polymer scaffold has not yet been fully explored. Here, we report the potential use of silicate-containing hydroxyapatite (SiHA) microparticles and microparticle aggregates in the predominant range from 2.23 to 12.40 µm in combination with polycaprolactone (PCL) as a hybrid scaffold with randomly oriented and well-aligned microfibers for regeneration of bone tissue. Chemical and mechanical properties of the developed 3D scaffolds were investigated with XRD, FTIR, EDX and tensile testing. Furthermore, the internal structure and surface morphology of the scaffolds were analyzed using synchrotron X-ray µCT and SEM. Upon culturing human mesenchymal stem cells (hMSC) on PCL-SiHA scaffolds, we found that both SiHA inclusion and microfiber orientation affected cell adhesion. The best hMSCs viability was revealed at 10 day for the PCL-SiHA scaffolds with well-aligned structure (~82%). It is expected that novel hybrid scaffolds of PCL will improve tissue ingrowth in vivo due to hydrophilic SiHA microparticles in combination with randomly oriented and well-aligned PCL microfibers, which mimic the structure of extracellular matrix of bone tissue.
Collapse
|
28
|
Banerjee SL, Hoskins R, Swift T, Rimmer S, Singha NK. A self-healable fluorescence active hydrogel based on ionic block copolymers prepared via ring opening polymerization and xanthate mediated RAFT polymerization. Polym Chem 2018. [DOI: 10.1039/c7py01883e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In this work we report a facile method to prepare a fluorescence active self-healable hydrogel via the incorporation of fluorescence responsive ionic block copolymers (BCPs).
Collapse
Affiliation(s)
- Sovan Lal Banerjee
- Rubber Technology Centre
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Richard Hoskins
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - Thomas Swift
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - Stephen Rimmer
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - Nikhil K. Singha
- Rubber Technology Centre
- Indian Institute of Technology
- Kharagpur-721302
- India
| |
Collapse
|
29
|
|
30
|
Enhancing the grafting amount of Poly(ε-caprolactone) on MgO nanoparticles by modifying with ethylene glycol for improving mechanical properties of Poly(ε-caprolactone). JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1374-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
31
|
Ho CMB, Mishra A, Hu K, An J, Kim YJ, Yoon YJ. Femtosecond-Laser-Based 3D Printing for Tissue Engineering and Cell Biology Applications. ACS Biomater Sci Eng 2017; 3:2198-2214. [PMID: 33445279 DOI: 10.1021/acsbiomaterials.7b00438] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Fabrication of 3D cell scaffolds has gained tremendous attention in recent years because of its applications in tissue engineering and cell biology applications. The success of tissue engineering or cell interactions mainly depends on the fabrication of well-defined microstructures, which ought to be biocompatible for cell proliferation. Femtosecond-laser-based 3D printing is one of the solution candidates that can be used to manufacture 3D tissue scaffolds through computer-aided design (CAD) which can be efficiently engineered to mimic the microenvironment of tissues. UV-based lithography has also been used for constructing the cellular scaffolds but the toxicity of UV light to the cells has prevented its application to the direct patterning of the cells in the scaffold. Although the mask-based lithography has provided a high resolution, it has only enabled 2D patterning not arbitrary 3D printing with design flexibility. Femtosecond-laser-based 3D printing is trending in the area of tissue engineering and cell biology applications due to the formation of well-defined micro- and submicrometer structures via visible and near-infrared (NIR) femtosecond laser pulses, followed by the fabrication of cell scaffold microstructures with a high precision. Laser direct writing and multiphoton polymerization are being used for fabricating the cell scaffolds, The implication of spatial light modulators in the interference lithography to generate the digital hologram will be the future prospective of mask-based lithography. Polyethylene glycol diacrylate (PEG-DA), ormocomp, pentaerythritol tetraacrylate (PETTA) have been fabricated through TPP to generate the cell scaffolds, whereas SU-8 was used to fabricate the microrobots for targeted drug delivery. Well-designed and precisely fabricated 3D cell scaffolds manufactured by femtosecond-laser-based 3D printing can be potentially used for studying cell migration, matrix invasion and nuclear stiffness to determine stage of cancer and will open broader horizons in the future in tissue engineering and biology applications.
Collapse
Affiliation(s)
- Chee Meng Benjamin Ho
- School of Mechanical & Aerospace Engineering and §Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Abhinay Mishra
- School of Mechanical & Aerospace Engineering and Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Kan Hu
- School of Mechanical & Aerospace Engineering and Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Jianing An
- School of Mechanical & Aerospace Engineering and Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Young-Jin Kim
- School of Mechanical & Aerospace Engineering and Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Yong-Jin Yoon
- School of Mechanical & Aerospace Engineering and Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| |
Collapse
|
32
|
Suryavanshi A, Khanna K, Sindhu KR, Bellare J, Srivastava R. Magnesium oxide nanoparticle-loaded polycaprolactone composite electrospun fiber scaffolds for bone-soft tissue engineering applications: in-vitro and in-vivo evaluation. ACTA ACUST UNITED AC 2017; 12:055011. [PMID: 28944766 DOI: 10.1088/1748-605x/aa792b] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of the present investigation was to assess the potential of magnesium oxide nanoparticle (MgO NP)-loaded electrospun polycaprolactone (PCL) polymer composites as a bone-soft tissue engineering scaffold. MgO NPs were synthesized using a hydroxide precipitation sol-gel method and characterized using field emission gun-scanning electron microscopy/energy-dispersive x-ray spectroscopy (FEG-SEM/EDS), field emission gun-transmission electron microscopy (FEG-TEM), and x-ray diffraction (XRD) analysis. PCL and MgO-PCL nanocomposite fibers were fabricated using electrospinning with trifluoroethanol as solvent at 19 kV applied voltage and 1.9 ml h-1 flow rate as optimized process parameters, and were characterized by FEG-TEM, FEG-SEM/EDS, XRD, and differential scanning calorimetry analyses. Characterization studies of as-synthesized nanoparticles revealed diffraction peaks indexed to various crystalline planes peculiar to MgO particles with hexagonal and cubical shape, and 40-60 nm size range. Significant improvement in mechanical properties (tensile strength and elastic modulus) of nanocomposites was observed as compared to neat polymer specimens (fourfold and threefold, respectively), due to uniform dispersion of nanofillers along the polymer fiber length. There was a remarkable bioactivity shown by nanocomposite scaffolds in immersion test, as indicated by formation of surface hydroxyapatite layer by the third day of incubation. MgO-loaded electrospun PCL mats showed enhanced in-vitro biological performance with osteoblast-like MG-63 cells in terms of adhesion, proliferation, and marked differentiation marker activity owing to greater surface roughness, nanotopography, and hydrophilicity facilitating higher protein adsorption. In-vivo subcutaneous implantation study in Sprague Dawley rats revealed initial moderate inflammatory tissue response near implant site at the second week timepoint that subsided later (eighth week) with no adverse effect on vital organ functionalities as seen in histopathological analysis supported by serum biochemical and hematological parameters which did not deviate significantly from normal physiological range, indicating good biocompatibility in-vivo. Thus, MgO-PCL nanocomposite electrospun fibers have potential as an efficient scaffold material for bone-soft tissue engineering applications.
Collapse
Affiliation(s)
- Ajay Suryavanshi
- NanoBios Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | | | | | | | | |
Collapse
|
33
|
|
34
|
Bharadwaj NAK, Kang JG, Hatzell MC, Schweizer KS, Braun PV, Ewoldt RH. Integration of colloids into a semi-flexible network of fibrin. SOFT MATTER 2017; 13:1430-1443. [PMID: 28124056 DOI: 10.1039/c6sm02141g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Typical colloid-polymer composites have particle diameters much larger than the polymer mesh size, but successful integration of smaller colloids into a large-mesh network could allow for the realization of new colloidal states of spatial organization and faster colloid motion which can allow the possibility of switchable re-configuration of colloids or more dramatic stimuli-responsive property changes. Experimental realization of such composites requires solving non-trivial materials selection and fabrication challenges; key questions include composition regime maps of successful composites, the resulting structure and colloidal contact network, and the mechanical properties, in particular the ability to form a network and retain strain stiffening in the presence of colloids. Here, we study these fundamental questions by formulating composites with fluorescent (though not stimuli-responsive) carboxylate modified polystyrene/latex (CML) colloidal particles (diameters 200 nm and 1000 nm) in bovine fibrin networks (a semi-flexible biopolymer network with mesh size 1-5 μm). We describe and characterize two methods of composite preparation: adding colloids before fibrinogen polymerization (Method I), and electrophoretically driving colloids into a network already formed by fibrinogen polymerization (Method II). We directly image the morphology of colloidal and fibrous components with two-color fluorescent confocal microscopy under wet conditions and SEM of fixed dry samples. Mechanical properties are studied with shear and extensional rheology. Both fabrication methods are successful, though with trade-offs. Method I retains the nonlinear strain-stiffening and extensibility of the native fibrin network, but some colloid clustering is observed and fibrin network integrity is lost above a critical colloid concentration that depends on fibrinogen and thrombin concentration. Larger colloids can be included at higher volume fractions before massive aggregation occurs, indicating surface interactions as a limiting factor. Method II results in a loss of measurable strain-stiffening, but colloids are well dispersed and template along the fibrous scaffold. The results here, with insight into both structure and rheology, form a foundational understanding for the integration of other colloids, e.g. with stimuli-responsive functionalities, into semi-flexible networks.
Collapse
Affiliation(s)
- N Ashwin K Bharadwaj
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jin Gu Kang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Marta C Hatzell
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Kenneth S Schweizer
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Paul V Braun
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Randy H Ewoldt
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| |
Collapse
|
35
|
Gu D, Tan S, Xu C, O'Connor AJ, Qiao GG. Engineering tough, highly compressible, biodegradable hydrogels by tuning the network architecture. Chem Commun (Camb) 2017; 53:6756-6759. [DOI: 10.1039/c7cc02811c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By tailoring the network architecture, tough, highly compressible, biodegradable hydrogels have been developed. This study also shows that the arrangement of each component in the network has a more significant effect on the overall mechanical properties than the network composition.
Collapse
Affiliation(s)
- Dunyin Gu
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Parkville
- Australia
| | - Shereen Tan
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Parkville
- Australia
| | - Chenglong Xu
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Parkville
- Australia
| | - Andrea J. O'Connor
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Parkville
- Australia
| | - Greg G. Qiao
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Parkville
- Australia
| |
Collapse
|
36
|
Ho CMB, Mishra A, Lin PTP, Ng SH, Yeong WY, Kim YJ, Yoon YJ. 3D Printed Polycaprolactone Carbon Nanotube Composite Scaffolds for Cardiac Tissue Engineering. Macromol Biosci 2016; 17. [DOI: 10.1002/mabi.201600250] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/10/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Chee Meng Benjamin Ho
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
- Singapore Centre for 3D Printing; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
- A*STAR's Singapore Institute of Manufacturing Technology (SIMTech); 2 Fusionopolis Way, Level 10 Innovis and Kinesis 138634 Singapore
| | - Abhinay Mishra
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
- Singapore Centre for 3D Printing; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| | - Pearlyn Teo Pei Lin
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| | - Sum Huan Ng
- A*STAR's Singapore Institute of Manufacturing Technology (SIMTech); 2 Fusionopolis Way, Level 10 Innovis and Kinesis 138634 Singapore
| | - Wai Yee Yeong
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
- Singapore Centre for 3D Printing; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| | - Young-Jin Kim
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
- Singapore Centre for 3D Printing; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| | - Yong-Jin Yoon
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
- Singapore Centre for 3D Printing; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| |
Collapse
|
37
|
Huang SH, Hsu TT, Huang TH, Lin CY, Shie MY. Fabrication and characterization of polycaprolactone and tricalcium phosphate composites for tissue engineering applications. J Dent Sci 2016; 12:33-43. [PMID: 30895021 PMCID: PMC6395261 DOI: 10.1016/j.jds.2016.05.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 05/20/2016] [Indexed: 12/22/2022] Open
Abstract
Background/purpose β-Tricalcium phosphate (β-TCP) is an osteoconductive material which has been used for clinical purposes for several years, as is polycaprolactone (PCL), which has already been approved for a number of medical and drug delivery devices. In this study we have incorporated various concentrations of β-TCP into PCL with the aim of developing an injectable, mechanically strong, and biodegradable material which can be used for medical purposes without organic solvents. Materials and methods This study assesses the physical and chemical properties of this material, evaluates the in vitro bioactivity of the PCL/β-TCP composites, and analyzes cell proliferation and osteogenic differentiation when using human bone marrow mesenchymal stem cells (hBMSCs). Results The results show that weight losses of approximately 5.3%, 12.1%, 18.6%, and 25.2%, were observed for the TCP0, TCP10, TCP30, and TCP50 composites after immersion in simulated body fluid for 12 weeks, respectively, indicating significant differences (P < 0.05). In addition, PCL/β-TCP composites tend to have lower contact angles (47 ± 1.5° and 58 ± 1.7° for TCP50 and TCP30, respectively) than pure PCL (85 ± 1.3°), which are generally more hydrophilic. After 7 days, a significant (22% and 34%, respectively) increase (P < 0.05) in alkaline phosphatase level was measured for TCP30 and TCP50 in comparison with the pure PCL. Conclusion PCL/TCP is biocompatible with hBMSCs. It not only promotes proliferation of hBMSCs but also helps to differentiate reparative hard tissue. We suggest 50% (weight) PCL-containing β-TCP biocomposites as the best choice for hard tissue repair applications.
Collapse
Affiliation(s)
- Shu-Hsien Huang
- School of Dentistry, Chung Shan Medical University, Taichung City, Taiwan
| | - Tuan-Ti Hsu
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung City, Taiwan
| | - Tsui-Hsien Huang
- School of Dentistry, Chung Shan Medical University, Taichung City, Taiwan.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung City, Taiwan
| | - Cheng-Yao Lin
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung City, Taiwan
| | - Ming-You Shie
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung City, Taiwan.,School of Dentistry, China Medical University, Taichung City, Taiwan
| |
Collapse
|
38
|
Vacková T, Kratochvíl J, Ostafinska A, Krejčíková S, Nevoralová M, Slouf M. Impact of particle morphology on structure, crystallization kinetics, and properties of PCL composites with TiO2-based particles. Polym Bull (Berl) 2016. [DOI: 10.1007/s00289-016-1723-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
39
|
Nanocomposite fibers of poly(lactic acid)/titanium dioxide prepared by solution blow spinning. Polym Bull (Berl) 2016. [DOI: 10.1007/s00289-016-1635-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
40
|
Cao Z, Wang D, Lyu L, Gong Y, Li Y. Fabrication and characterization of PCL/CaCO3 electrospun composite membrane for bone repair. RSC Adv 2016. [DOI: 10.1039/c5ra22548e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CaCO3/casein microspheres were entrapped in PCL membranes using electrospinning to mimic the hierarchical structure of ECM in bone. The composite membranes showed enhanced biomineralization property, proliferation and osteogenic differentiation potential of HMSCs.
Collapse
Affiliation(s)
- Zhinan Cao
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Dandan Wang
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Lingwei Lyu
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Yihong Gong
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Yan Li
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| |
Collapse
|
41
|
Hassanzadeh S, Adolfsson KH, Wu D, Hakkarainen M. Supramolecular Assembly of Biobased Graphene Oxide Quantum Dots Controls the Morphology of and Induces Mineralization on Poly(ε-caprolactone) Films. Biomacromolecules 2015; 17:256-61. [DOI: 10.1021/acs.biomac.5b01339] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Salman Hassanzadeh
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Karin H. Adolfsson
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Duo Wu
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| |
Collapse
|
42
|
Gonçalves EM, Oliveira FJ, Silva RF, Neto MA, Fernandes MH, Amaral M, Vallet-Regí M, Vila M. Three-dimensional printed PCL-hydroxyapatite scaffolds filled with CNTs for bone cell growth stimulation. J Biomed Mater Res B Appl Biomater 2015; 104:1210-9. [PMID: 26089195 DOI: 10.1002/jbm.b.33432] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 01/12/2015] [Accepted: 03/30/2015] [Indexed: 11/09/2022]
Abstract
A three-phase [nanocrystalline hydroxyapatite (HA), carbon nanotubes (CNT), mixed in a polymeric matrix of polycaprolactone (PCL)] composite scaffold produced by 3D printing is presented. The CNT content varied between 0 and 10 wt % in a 50 wt % PCL matrix, with HA being the balance. With the combination of three well-known materials, these scaffolds aimed at bringing together the properties of all into a unique material to be used in tissue engineering as support for cell growth. The 3D printing technique allows producing composite scaffolds having an interconnected network of square pores in the range of 450-700 μm. The 2 wt % CNT scaffold offers the best combination of mechanical behaviour and electrical conductivity. Its compressive strength of ∼4 MPa is compatible with the trabecular bone. The composites show typical hydroxyapatite bioactivity, good cell adhesion and spreading at the scaffolds surface, this combination of properties indicating that the produced 3D, three-phase, scaffolds are promising materials in the field of bone regenerative medicine. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1210-1219, 2016.
Collapse
Affiliation(s)
- Elsa M Gonçalves
- CICECO, Materials and Ceramic Engineering Department, University of Aveiro, Campus de Santiago, 3810-193, Portugal
| | - Filipe J Oliveira
- CICECO, Materials and Ceramic Engineering Department, University of Aveiro, Campus de Santiago, 3810-193, Portugal
| | - Rui F Silva
- CICECO, Materials and Ceramic Engineering Department, University of Aveiro, Campus de Santiago, 3810-193, Portugal
| | - Miguel A Neto
- CICECO, Materials and Ceramic Engineering Department, University of Aveiro, Campus de Santiago, 3810-193, Portugal
| | - M Helena Fernandes
- Fac. Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Univ. do Porto, Portugal
| | - Margarida Amaral
- CICECO, Materials and Ceramic Engineering Department, University of Aveiro, Campus de Santiago, 3810-193, Portugal
| | - María Vallet-Regí
- Facultad de Farmacia, Departamento de Química Inorgánica y Bioinorgánica, Universidad Complutense de Madrid. Plaza de Ramón y Cajal s/n, 28040, Madrid, Spain
| | - Mercedes Vila
- Facultad de Farmacia, Departamento de Química Inorgánica y Bioinorgánica, Universidad Complutense de Madrid. Plaza de Ramón y Cajal s/n, 28040, Madrid, Spain.,TEMA-NRD, Mechanical Engineering Department, University of Aveiro, 3810-193, Portugal
| |
Collapse
|
43
|
Mohapatra L, Parida KM. Dramatic activities of vanadate intercalated bismuth doped LDH for solar light photocatalysis. Phys Chem Chem Phys 2015; 16:16985-96. [PMID: 25005613 DOI: 10.1039/c4cp01665c] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To harvest solar energy efficiently, a series of Zn/Bi layered double hydroxide (LDH) photocatalysts with different molar ratios of Zn/Bi (2 : 1, 3 : 1, 4 : 1) has been synthesized by a coprecipitation method at constant pH. All the Bi doped LDH samples displayed hydrotalcite-like structure with interlayer carbonate, in which crystallinity decreases as the bismuth content increases. The Zn/Bi (4 : 1) LDH with a small amount of bismuth in the brucite layer and possessing high crystallinity was further modified hydrothermally by intercalating decavanadate and it showed high photochemical stability and photocatalytic activity for the degradation of different organic pollutants for practical applications under solar light irradiation. The structural integrity of the materials has been successfully characterized by studying their structural, morphological, electronic and optical properties by various physico-chemical techniques. The present study provided an insight into oxo-bridged MMCT of the LDH and established that the Zn(II)-O-Bi(III) units resulted in the generation of superoxide radicals which is clearly observed by the EPR technique. The ˙OH radicals formed during photocatalysis were revealed by means of the terephthalic acid fluorescence probe method. The photoelectrochemical measurement confirmed that the intercalated vanadate anion was crucial to obtain an optimal synergistic effect for the degradation of organic pollutants. The prolonged lifetime of photogenerated charges and improved charge transfer capability were confirmed by time-resolved fluorescence emission spectra. Furthermore, a detailed mechanism for the enhanced photocatalytic activity was discussed.
Collapse
|
44
|
Li K, Peng J, Zhang M, Heng J, Li D, Mu C. Comparative study of the effects of anatase and rutile titanium dioxide nanoparticles on the structure and properties of waterborne polyurethane. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.072] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
45
|
Saravanamoorthy S, Chandra Bose A, Velmathi S. Facile fabrication of polycaprolactone/h-MoO3 nanocomposites and their structural, optical and electrical properties. RSC Adv 2015. [DOI: 10.1039/c5ra17733b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hexagonal molybdenum oxide (h-MoO3) nanocrystals with a flower-like hierarchical structure were successfully incorporated into polycaprolactone (PCL) matrix by a simple solution casting technique.
Collapse
Affiliation(s)
- Somasundaram Saravanamoorthy
- Organic and Polymer Synthesis Laboratory
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Arumugam Chandra Bose
- Nanomaterials Laboratory
- Department of Physics
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Sivan Velmathi
- Organic and Polymer Synthesis Laboratory
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| |
Collapse
|
46
|
The Influence of Hydroxyapatite and Calcium Carbonate Microparticles on the Mechanical Properties of Nonwoven Composite Materials Based on Polycaprolactone. BIONANOSCIENCE 2014. [DOI: 10.1007/s12668-014-0158-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
47
|
Liu X, Hasan MS, Grant DM, Harper LT, Parsons AJ, Palmer G, Rudd CD, Ahmed I. Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites. J Biomater Appl 2014; 29:675-87. [DOI: 10.1177/0885328214541302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Retention of mechanical properties of phosphate glass fibre reinforced degradable polyesters such as polycaprolactone and polylactic acid in aqueous media has been shown to be strongly influenced by the integrity of the fibre/polymer interface. A previous study utilising ‘single fibre’ fragmentation tests found that coating with magnesium improved the fibre and matrix interfacial shear strength. Therefore, the aim of this study was to investigate the effects of a magnesium coating on the manufacture and characterisation of a random chopped fibre reinforced polycaprolactone composite. Short chopped strand non-woven phosphate glass fibre mats were sputter coated with degradable magnesium to manufacture phosphate glass fibre/polycaprolactone composites. The degradation behaviour (water uptake, mass loss and pH change of the media) of these polycaprolactone composites as well as of pure polycaprolactone was investigated in phosphate buffered saline. The Mg coated fibre reinforced composites revealed less water uptake and mass loss during degradation compared to the non-coated composites. The cations released were also explored and a lower ion release profile for all three cations investigated (namely Na+, Mg2+ and Ca2+) was seen for the Mg coated composite samples. An increase of 17% in tensile strength and 47% in tensile modulus was obtained for the Mg coated composite samples. Both flexural and tensile properties were investigated and a higher retention of mechanical properties was obtained for the Mg coated fibre reinforced composite samples up to 10 days immersion in PBS. Cytocompatibility study showed both composite samples (coated and non-coated) had good cytocompatibility with human osteosarcoma cell line.
Collapse
Affiliation(s)
- Xiaoling Liu
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Muhammad S Hasan
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - David M Grant
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Lee T Harper
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Andrew J Parsons
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Graham Palmer
- Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, London, UK
| | - Chris D Rudd
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Ifty Ahmed
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| |
Collapse
|
48
|
3D silk fibroin scaffold incorporating titanium dioxide (TiO2) nanoparticle (NPs) for tissue engineering. Int J Biol Macromol 2014; 68:158-68. [DOI: 10.1016/j.ijbiomac.2014.04.045] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 04/21/2014] [Accepted: 04/22/2014] [Indexed: 12/22/2022]
|
49
|
Ghosal K, Thomas S, Kalarikkal N, Gnanamani A. Collagen coated electrospun polycaprolactone (PCL) with titanium dioxide (TiO2) from an environmentally benign solvent: preliminary physico-chemical studies for skin substitute. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0410-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
50
|
Badrossamay MR, Balachandran K, Capulli AK, Golecki HM, Agarwal A, Goss JA, Kim H, Shin K, Parker KK. Engineering hybrid polymer-protein super-aligned nanofibers via rotary jet spinning. Biomaterials 2014; 35:3188-97. [PMID: 24456606 DOI: 10.1016/j.biomaterials.2013.12.072] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 12/20/2013] [Indexed: 02/09/2023]
Abstract
Cellular microenvironments are important in coaxing cells to behave collectively as functional, structured tissues. Important cues in this microenvironment are the chemical, mechanical and spatial arrangement of the supporting matrix in the extracellular space. In engineered tissues, synthetic scaffolding provides many of these microenvironmental cues. Key requirements are that synthetic scaffolds should recapitulate the native three-dimensional (3D) hierarchical fibrillar structure, possess biomimetic surface properties and demonstrate mechanical integrity, and in some tissues, anisotropy. Electrospinning is a popular technique used to fabricate anisotropic nanofiber scaffolds. However, it suffers from relatively low production rates and poor control of fiber alignment without substantial modifications to the fiber collector mechanism. Additionally, many biomaterials are not amenable for fabrication via high-voltage electrospinning methods. Hence, we reasoned that we could utilize rotary jet spinning (RJS) to fabricate highly aligned hybrid protein-polymer with tunable chemical and physical properties. In this study, we engineered highly aligned nanofiber constructs with robust fiber alignment from blends of the proteins collagen and gelatin, and the polymer poly-ε-caprolactone via RJS and electrospinning. RJS-spun fibers retain greater protein content on the surface and are also fabricated at a higher production rate compared to those fabricated via electrospinning. We measured increased fiber diameter and viscosity, and decreasing fiber alignment as protein content increased in RJS hybrid fibers. RJS nanofiber constructs also demonstrate highly anisotropic mechanical properties mimicking several biological tissue types. We demonstrate the bio-functionality of RJS scaffold fibers by testing their ability to support cell growth and maturation with a variety of cell types. Our highly anisotropic RJS fibers are therefore able to support cellular alignment, maturation and self-organization. The hybrid nanofiber constructs fabricated by RJS therefore have the potential to be used as scaffold material for a wide variety of biological tissues and organs, as an alternative to electrospinning.
Collapse
Affiliation(s)
- Mohammad R Badrossamay
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA
| | - Kartik Balachandran
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA
| | - Andrew K Capulli
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA
| | - Holly M Golecki
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA
| | - Ashutosh Agarwal
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA
| | - Josue A Goss
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA
| | - Hansu Kim
- Department of Chemistry and Sogang-Harvard Center for Disease Biophysics Research, 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, South Korea
| | - Kwanwoo Shin
- Department of Chemistry and Sogang-Harvard Center for Disease Biophysics Research, 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, South Korea
| | - Kevin Kit Parker
- Disease Biophysics Group, School of Engineering and Applied Sciences Harvard University, 60 Oxford St, Cambridge, MA 02138, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA.
| |
Collapse
|