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Chou YC, Hsu YH, Lee D, Yang JW, Yu YH, Chan EC, Liu SJ. Novel Bioresorbable Drug-Eluting Mesh Scaffold for Therapy of Muscle Injury. ACS Biomater Sci Eng 2024; 10:2595-2606. [PMID: 38480510 DOI: 10.1021/acsbiomaterials.3c01669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
A novel bioresorbable drug-eluting polycaprolactone (PCL) mesh scaffold was developed, utilizing a solvent-cast additive manufacturing technique, to promote therapy of muscle injury. The degradation rate and mechanical properties strength of the PCL mesh were characterized after immersion in a buffer solution for different times. The in vitro release characteristics of vancomycin, ceftazidime, and lidocaine from the prepared mesh were evaluated using a high-performance liquid chromatography (HPLC) assay. In addition, the in vivo efficacy of PCL meshes for the repair of muscle injury was investigated on a rat model with histological examinations. It was found that the additively manufactured PCL meshes degraded by 13% after submission in buffered solution for four months. All PCL meshes with different pore sizes exhibited greater strength than rat muscle and survived through 10,000 cyclic loadings. Furthermore, the meshes could offer a sustained release of antibiotics and analgesics for more than 3 days in vitro. The results of this study suggest that drug-loaded PCL mesh exhibits superior ability to pure PCL mesh in terms of effectively promoting muscle repair in rat models. The histological assay also showed adequate biocompatibility of the resorbable meshes. The additively manufactured biodegradable drug-eluting meshes may be adopted in the future in humans for the therapy of muscle injuries.
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Affiliation(s)
- Ying-Chao Chou
- Bone and Joint Research Center, Department of Orthopedics, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan
| | - Yung-Heng Hsu
- Bone and Joint Research Center, Department of Orthopedics, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan
| | - Demei Lee
- Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Jheng-Wei Yang
- Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yi-Hsun Yu
- Bone and Joint Research Center, Department of Orthopedics, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan
| | - Err-Cheng Chan
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan 33302, Taiwan
| | - Shih-Jung Liu
- Bone and Joint Research Center, Department of Orthopedics, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan
- Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
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He Y, Zan J, He Z, Bai X, Shuai C, Pan H. A Photochemically Active Cu 2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:452. [PMID: 38470782 DOI: 10.3390/nano14050452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024]
Abstract
Cuprous oxide (Cu2O) has great potential in photodynamic therapy for implant-associated infections due to its good biocompatibility and photoelectric properties. Nevertheless, the rapid recombination of electrons and holes weakens its photodynamic antibacterial effect. In this work, a new nanosystem (Cu2O@rGO) with excellent photodynamic performance was designed via the in situ growth of Cu2O on reduced graphene oxide (rGO). Specifically, rGO with lower Fermi levels served as an electron trap to capture photoexcited electrons from Cu2O, thereby promoting electron-hole separation. More importantly, the surface of rGO could quickly transfer electrons from Cu2O owing to its excellent conductivity, thus efficiently suppressing the recombination of electron-hole pairs. Subsequently, the Cu2O@rGO nanoparticle was introduced into poly-L-lactic acid (PLLA) powder to prepare PLLA/Cu2O@rGO porous scaffolds through selective laser sintering. Photochemical analysis showed that the photocurrent of Cu2O@rGO increased by about two times after the incorporation of GO nanosheets, thus enhancing the efficiency of photogenerated charge carriers and promoting electron-hole separation. Moreover, the ROS production of the PLLA/Cu2O@rGO scaffold was significantly increased by about two times as compared with that of the PLLA/Cu2O scaffold. The antibacterial results showed that PLLA/Cu2O@rGO possessed antibacterial rates of 83.7% and 81.3% against Escherichia coli and Staphylococcus aureus, respectively. In summary, this work provides an effective strategy for combating implant-related infections.
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Affiliation(s)
- Yushan He
- Hunan 3D Printing Engineering Research Center of Oral Care, Department of Periodontics, Xiangya Stomatological Hospital, Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Jun Zan
- Institute of Additive Manufacturing, Jiangxi University of Science and Technology, Nanchang 330013, China
| | - Zihui He
- Hunan 3D Printing Engineering Research Center of Oral Care, Department of Periodontics, Xiangya Stomatological Hospital, Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Xinna Bai
- Hunan 3D Printing Engineering Research Center of Oral Care, Department of Conservative Dentistry and Endodontics, Xiangya Stomatological Hospital, Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Cijun Shuai
- State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
- Shenzhen Institute of Information Technology, School of Sino-German Robotics, Shenzhen 518172, China
- College of Mechanical Engineering, Xinjiang University, Urumqi 830017, China
| | - Hao Pan
- Hunan 3D Printing Engineering Research Center of Oral Care, Department of Periodontics, Xiangya Stomatological Hospital, Xiangya School of Stomatology, Central South University, Changsha 410008, China
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Dasgupta N, Sun D, Gorbet M, Gauthier M. Chitosan Grafted with Thermoresponsive Poly(di(ethylene glycol) Methyl Ether Methacrylate) for Cell Culture Applications. Polymers (Basel) 2023; 15:polym15061515. [PMID: 36987295 PMCID: PMC10051194 DOI: 10.3390/polym15061515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Chitosan is a polysaccharide extracted from animal sources such as crab and shrimp shells. In this work, chitosan films were modified by grafting them with a thermoresponsive polymer, poly(di(ethylene glycol) methyl ether methacrylate) (PMEO2MA). The films were modified to introduce functional groups useful as reversible addition-fragmentation chain transfer (RAFT) agents. PMEO2MA chains were then grown from the films via RAFT polymerization, making the chitosan films thermoresponsive. The degree of substitution of the chitosan-based RAFT agent and the amount of monomer added in the grafting reaction were varied to control the length of the grafted PMEO2MA chain segments. The chains were cleaved from the film substrates for characterization using 1H NMR and a gel permeation chromatography analysis. Temperature-dependent contact angle measurements were used to demonstrate that the hydrophilic-hydrophobic nature of the film surface varied with temperature. Due to the enhanced hydrophobic character of PMEO2MA above its lower critical solution temperature (LCST), the ability of PMEO2MA-grafted chitosan films to serve as a substrate for cell growth at 37 °C (incubation temperature) was tested. Interactions with cells (fibroblasts, macrophages, and corneal epithelial cells) were assessed. The modified chitosan films supported cell viability and proliferation. As the temperature is lowered to 4 °C (refrigeration temperature, below the LCST), the grafted chitosan films become less hydrophobic, and cell adhesion should decrease, facilitating their removal from the surface. Our results indicated that the cells were detached from the films following a short incubation period at 4 °C, were viable, and retained their ability to proliferate.
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Affiliation(s)
- Natun Dasgupta
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Duo Sun
- Department of Systems Design Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Maud Gorbet
- Department of Systems Design Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Mario Gauthier
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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Zhou Y, Wang G, Wang T, Wang J, Wen X, Sun H, Yu L, Liu X, Zhang J, Zhou Q, Sun Y. Multidynamic Osteogenic Differentiation by Effective Polydopamine Micro-Arc Oxide Manipulations. Int J Nanomedicine 2022; 17:4773-4790. [PMID: 36246934 PMCID: PMC9553511 DOI: 10.2147/ijn.s378387] [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: 06/22/2022] [Accepted: 09/06/2022] [Indexed: 11/05/2022] Open
Abstract
Introduction The nanostructural modification of the oral implant surface can effectively mimic the morphology of natural bone tissue, allowing osteoblasts to achieve both proliferation and differentiation capabilities at the bone interface of the dental implant. To improve the osteoinductive activity on the surface of titanium implants for rapid osseointegration, we prepared a novel composite coating (MAO-PDA-NC) by micro-arc oxidation technique and immersion method and evaluated the proliferation, adhesion, and osteogenic differentiation of osteoblasts on this coating. Methods The coatings were prepared by micro-arc oxidation (MAO) technique and immersion method, and characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM) for different coatings; the loading of PDA was examined using Fourier transform infrared spectroscopy (FTIR); the ion release capacity of the coatings was determined by inductively coupled plasma emission spectrometry (ICP-OES); the interfacial bonding of the coatings was examined using nanoscratch experiment strength. The cytotoxicity of the coating was examined by live/dead staining kit; cell proliferation viability was examined by CCK-8 kit; adhesion and osteogenic effect of the coating were examined by immunofluorescence staining and RT-PCR; osteogenic differentiation was examined by alkaline phosphatase staining. Results The surface morphology of titanium implants was modified by micro-arc oxidation technology, and a new MAO-PDA-NC composite coating was successfully prepared. The results showed that the MAO-PDA-NC coating not only optimized the physical and chemical properties of the titanium implant surface but also significantly stimulated the biological properties of osteoblast adhesion, proliferation, and osteogenic differentiation on the coating surface. Conclusion These results show that MAO-PDA-NC composite coating can significantly improve the surface properties of titanium implants and achieve a stable bond between implant and bone tissue, thus accelerating early osseointegration.
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Affiliation(s)
- Yuqi Zhou
- School of Stomatology, Weifang Medical University, Weifang, People’s Republic of China
| | - Guifang Wang
- Department of Prosthodontics, Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, People’s Republic of China
| | - Tianqi Wang
- School of Stomatology, Weifang Medical University, Weifang, People’s Republic of China
| | - Jiajia Wang
- Department of Oral Surgery, Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, People’s Republic of China
| | - Xutao Wen
- Department of Oral Surgery, Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, People’s Republic of China
| | - Haishui Sun
- School of Stomatology, Weifang Medical University, Weifang, People’s Republic of China
| | - Lei Yu
- School of Stomatology, Weifang Medical University, Weifang, People’s Republic of China
| | - Xiaoying Liu
- School of Bioscience and Technology, Weifang Medical University, Weifang, People’s Republic of China
| | - Juanjuan Zhang
- School of Stomatology, Weifang Medical University, Weifang, People’s Republic of China
| | - Qin Zhou
- Department of Oral Surgery, Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, People’s Republic of China,Correspondence: Qin Zhou, Department of Oral Surgery, Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, 200011,People’s Republic of China, Tel +86 15900827810, Email
| | - Yan Sun
- School of Stomatology, Weifang Medical University, Weifang, People’s Republic of China,Yan Sun, School of Stomatology, Weifang Medical University, Weifang, Shandong Province, 261053, People’s Republic of China, Tel +86 13356797219, Email
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Grzybek P, Jakubski Ł, Dudek G. Neat Chitosan Porous Materials: A Review of Preparation, Structure Characterization and Application. Int J Mol Sci 2022; 23:ijms23179932. [PMID: 36077330 PMCID: PMC9456476 DOI: 10.3390/ijms23179932] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 11/17/2022] Open
Abstract
This review presents an overview of methods for preparing chitosan-derived porous materials and discusses their potential applications. This family of materials has garnered significant attention owing to their biocompatibility, nontoxicity, antibacterial properties, and biodegradability, which make them advantageous in a wide range of applications. Although individual porous chitosan-based materials have been widely discussed in the literature, a summary of all available methods for preparing materials based on pure chitosan, along with their structural characterization and potential applications, has not yet been presented. This review discusses five strategies for fabricating porous chitosan materials, i.e., cryogelation, freeze-drying, sol-gel, phase inversion, and extraction of a porogen agent. Each approach is described in detail with examples related to the preparation of chitosan materials. The influence of the fabrication method on the structure of the obtained material is also highlighted herein. Finally, we discuss the potential applications of the considered materials.
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Yang H, Su Y, Sun Z, Ma B, Liu F, Kong Y, Sun C, Li B, Sang Y, Wang S, Li G, Qiu J, Liu C, Geng Z, Liu H. Gold Nanostrip Array-Mediated Wireless Electrical Stimulation for Accelerating Functional Neuronal Differentiation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202376. [PMID: 35618610 PMCID: PMC9353484 DOI: 10.1002/advs.202202376] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Indexed: 05/27/2023]
Abstract
Neural stem cell (NSC)-based therapy holds great promise for the treatment of neurodegenerative diseases. Presently, however, it is hindered by poor functional neuronal differentiation. Electrical stimulation is considered one of the most effective ways to promote neuronal differentiation of NSCs. In addition to surgically implanted electrodes, traditional electrical stimulation includes wires connected to the external power supply, and an additional surgery is required to remove the electrodes or wires following stimulation, which may cause secondary injuries and infections. Herein, a novel method is reported for generation of wireless electrical signals on an Au nanostrip array by leveraging the effect of electromagnetic induction under a rotating magnetic field. The intensity of the generated electrical signals depends on the rotation speed and magnetic field strength. The Au nanostrip array-mediated electric stimulation promotes NSC differentiation into mature neurons within 5 days, at the mRNA, protein, and function levels. The rate of differentiation is faster by at least 5 days than that in cells without treatment. The Au nanostrip array-based wireless device also accelerates neuronal differentiation of NSCs in vivo. The novel method to accelerate the neuronal differentiation of NSCs has the advantages of wireless, timely, localized and precise controllability, and noninvasive power supplementation.
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Affiliation(s)
- Hongru Yang
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Yue Su
- State Key Laboratory of Integrated OptoelectronicsInstitute of SemiconductorsChinese Academy of SciencesBeijing100083P. R. China
| | - Zhaoyang Sun
- Department of Oral and Maxillofacial SurgeryQilu Hospital of Shandong UniversityJinanShandong250012P. R. China
| | - Baojin Ma
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Feng Liu
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Ying Kong
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Chunhui Sun
- Institute for Advanced Interdisciplinary ResearchUniversity of JinanJinanShandong250022P. R. China
| | - Boyan Li
- Department of Neurosurgery Qilu HospitalCheeloo College of Medicine and Institute of Brain and Brain‐Inspired ScienceShandong UniversityJinanShandong250012P. R. China
| | - Yuanhua Sang
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Shuhua Wang
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Gang Li
- Department of Neurosurgery Qilu HospitalCheeloo College of Medicine and Institute of Brain and Brain‐Inspired ScienceShandong UniversityJinanShandong250012P. R. China
| | - Jichuan Qiu
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
| | - Chao Liu
- Department of Oral and Maxillofacial SurgeryQilu Hospital of Shandong UniversityJinanShandong250012P. R. China
| | - Zhaoxin Geng
- School of Information EngineeringMinzu University of ChinaBeijing100081P. R. China
| | - Hong Liu
- State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong250100P. R. China
- Institute for Advanced Interdisciplinary ResearchUniversity of JinanJinanShandong250022P. R. China
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Antibacterial and Osteogenic Properties of Ag Nanoparticles and Ag/TiO2 Nanostructures Prepared by Atomic Layer Deposition. J Funct Biomater 2022; 13:jfb13020062. [PMID: 35645270 PMCID: PMC9149969 DOI: 10.3390/jfb13020062] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/15/2022] [Accepted: 05/16/2022] [Indexed: 12/18/2022] Open
Abstract
The combination of titania nanofilms and silver nanoparticles (NPs) is a very promising material, with antibacterial and osseointegration-induced properties for titanium implant coatings. In this work, we successfully prepared TiO2 nanolayer/Ag NP structures on titanium disks using atomic layer deposition (ALD). The samples were studied by scanning electron microscopy (SEM), X-ray diffraction, X-ray photoelectron spectroscopy (XPS), contact angle measurements, and SEM-EDS. Antibacterial activity was tested against Staphylococcus aureus. The in vitro cytological response of MG-63 osteosarcoma and human fetal mesenchymal stem cells (FetMSCs) was examined using SEM study of their morphology, MTT test of viability and differentiation using alkaline phosphatase and osteopontin with and without medium-induced differentiation in the osteogenic direction. The samples with TiO2 nanolayers, Ag NPs, and a TiO2/Ag combination showed high antibacterial activity, differentiation in the osteogenic direction, and non-cytotoxicity. The medium for differentiation significantly improved osteogenic differentiation, but the ALD coatings also stimulated differentiation in the absence of the medium. The TiO2/Ag samples showed the best antibacterial ability and differentiation in the osteogenic direction, indicating the success of the combining of TiO2 and Ag to produce a multifunctional biocompatible and bactericidal material.
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Selvamani V, Kadian S, Detwiler DA, Zareei A, Woodhouse I, Qi Z, Peana S, Alcaraz AM, Wang H, Rahimi R. Laser-Assisted Nanotexturing and Silver Immobilization on Titanium Implant Surfaces to Enhance Bone Cell Mineralization and Antimicrobial Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4014-4027. [PMID: 35312330 DOI: 10.1021/acs.langmuir.2c00008] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite the great advancement and wide use of titanium (Ti) and Ti-based alloys in different orthopedic implants, device-related infections remain the major complication in modern orthopedic and trauma surgery. Most of these infections are often caused by both poor antibacterial and osteoinductive properties of the implant surface. Here, we have demonstrated a facile two-step laser nanotexturing and immobilization of silver onto the titanium implants to improve both cellular integration and antibacterial properties of Ti surfaces. The required threshold laser processing power for effective nanotexturing and osseointegration was systematically determined by the level of osteoblast cells mineralized on the laser nanotextured Ti (LN-Ti) surfaces using a neodymium-doped yttrium aluminum garnet laser (Nd:YAG, wavelength of 1.06 μm). Laser processing powers above 24 W resulted in the formation of hierarchical nanoporous structures (average pore 190 nm) on the Ti surface with a 2.5-fold increase in osseointegration as compared to the pristine Ti surface. Immobilization of silver nanoparticles onto the LN-Ti surface was conducted by dip coating in an aqueous silver ionic solution and subsequently converted to silver nanoparticles (AgNPs) by using a low power laser-assisted photocatalytic reduction process. Structural and surface morphology analysis via XRD and SEM revealed a uniform distribution of Ag and the formation of an AgTi-alloy interface on the Ti surface. The antibacterial efficacy of the LN-Ti with laser immobilized silver (LN-Ti/LI-Ag) was tested against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The LN-Ti/LI-Ag surface was observed to have efficient and stable antimicrobial properties for over 6 days. In addition, it was found that the LN-Ti/LI-Ag maintained a cytocompatibility and bone cell mineralization property similar to the LN-Ti surface. The differential toxicity of the LN-Ti/LI-Ag between bacterial and cellular species qualifies this approach as a promising candidate for novel rapid surface modification of biomedical metal implants.
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Affiliation(s)
- Vidhya Selvamani
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Sachin Kadian
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | | | - Amin Zareei
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Ian Woodhouse
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Zhimin Qi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Samuel Peana
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Alejandro M Alcaraz
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Rahim Rahimi
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
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9
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Luo F, Wang L, Xiao Z, Zhu X, Fan Y, Wang K, Zhang X. Application of femtosecond laser microfabrication in the preparation of advanced bioactive titanium surfaces. J Mater Chem B 2021; 9:3912-3924. [PMID: 33928992 DOI: 10.1039/d1tb00231g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The surface activation of titanium plays a key role in the biological properties of titanium implants as bone repair materials. Improving the ability to induce apatite precipitation on the surface was a well-accepted titanium bioactivation route. In this study, advanced femtosecond laser microfabrication was applied to modify titanium surfaces, and the effect of femtosecond laser etching on apatite precipitation was investigated and compared with popular titanium modification methods. Meanwhile, the mechanism of apatite formation after femtosecond laser modification was interpreted from the point of materials science. The surface physical-chemical characterization results showed that femtosecond laser etching can improve the surface hydrophilicity and increase the surface energy. Compared with traditional abrasive paper and acid-alkali treatment, this method increased the contents of active sites including titanium oxide and titanium-hydroxyl on titanium surfaces. TiO2 on the surface was transformed to TiO after femtosecond laser treatment. The samples etched with 0.3 W and 0.5 W femtosecond lasers had a better ability to induce apatite deposition than those treated with traditional mechanical treatment and popular acid-alkali modification, which would lead to better bioactivity and osteointegration. Considering the technical advantages of femtosecond lasers in microfabrication, it provides a more efficient and controllable scheme for the bioactivation of titanium. This research would improve the application potential of femtosecond laser treatment, such as micropattern preparation and surface activation, in the field of biomaterials.
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Affiliation(s)
- Fengxiong Luo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
| | - Ling Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
| | - Zhanwen Xiao
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
| | - Xiangdong Zhu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
| | - Yujiang Fan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
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10
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Wu YX, Ma H, Wang JL, Qu W. Production of chitosan scaffolds by lyophilization or electrospinning: which is better for peripheral nerve regeneration? Neural Regen Res 2021; 16:1093-1098. [PMID: 33269755 PMCID: PMC8224144 DOI: 10.4103/1673-5374.300463] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/24/2020] [Accepted: 09/20/2020] [Indexed: 11/17/2022] Open
Abstract
Both lyophilization and electrospinning are commonly used to make chitosan scaffolds. However, it remains unknown which method is better for cell growth. In this study, we established the following groups: (1) lyophilization group-chitosan scaffolds were prepared by lyophilization method and seeded with Schwann cells from Sprague-Dawley rats aged 3-5 days; (2) electrospinning group-chitosan scaffolds were prepared by electrospinning method and seeded with Schwann cells; (3) control group-Schwann cells were cultured on culture dishes. The growth of Schwann cells was evaluated by immunofluorescence and scanning electron microscopy. Western blot assay was performed to explore the mechanism of Schwann cell growth. Both materials were non-toxic and suitable for the growth of Schwann cells. The pores produced by electrospinning were much smaller than those produced by lyophilization. The proliferation rate and adhesion rate of Schwann cells in the electrospinning group were higher than those in the lyophilization group. Schwann cells cultured on electrospinning scaffolds formed a Bungner band-like structure, and a much greater amount of brain-derived neurotrophic factor was secreted, which can promote the growth of neurons. Our findings show that the chitosan scaffold prepared by the electrospinning method has a nanofiber structure that provides an extracellular matrix that is more favorable for cell-cell interactions. The electrospinning method is more suitable for nerve regeneration than the lyophilization method. This research was approved by the Medical Ethical Committee of Dalian Medical University (approval No. AEE1-2016-045) on March 3, 2016.
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Affiliation(s)
- Yu-Xuan Wu
- Department of Hand Microsurgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Hao Ma
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jian-Lan Wang
- Department of Traditional Chinese Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Wei Qu
- Department of Hand Microsurgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
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Gao F, Jiang M, Liang W, Fang X, Bai F, Zhou Y, Lang M. Co‐electrospun cellulose diacetate‐graft‐poly(ethylene terephthalate) and collagen composite nanofibrous mats for cells culture. J Appl Polym Sci 2020. [DOI: 10.1002/app.49350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Feifei Gao
- Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and EngineeringEast China University of Science and Technology Shanghai People's Republic of China
| | - Mingli Jiang
- State Key Laboratory of Bioreactor Engineering, School of biotechnologyEast China University of Science and Technology Shanghai People's Republic of China
| | - Wencheng Liang
- Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and EngineeringEast China University of Science and Technology Shanghai People's Republic of China
| | - Xiangchen Fang
- Fushun Research Institute of Petroleum and PetrochemicalsSINOPEC Liaoning People's Republic of China
| | - Fudong Bai
- Fushun Research Institute of Petroleum and PetrochemicalsSINOPEC Liaoning People's Republic of China
| | - Yan Zhou
- State Key Laboratory of Bioreactor Engineering, School of biotechnologyEast China University of Science and Technology Shanghai People's Republic of China
| | - Meidong Lang
- Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and EngineeringEast China University of Science and Technology Shanghai People's Republic of China
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12
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Xie W, Ouyang R, Wang H, Zhou C. Construction and Biocompatibility of Three-Dimensional Composite Polyurethane Scaffolds in Liquid Crystal State. ACS Biomater Sci Eng 2020; 6:2312-2322. [PMID: 33455305 DOI: 10.1021/acsbiomaterials.9b01838] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Liquid crystal (LC), a characteristic substance of biofilms, has been reported to positively affect cell affinity. To better combine and utilize the properties of an LC and the advantages of polyurethane (PU) elastomers, the three-dimensional printing (3DP) molding technology and the simple soaking-swelling blending technology were used to construct PU/LC 3D composite scaffolds, and the compressive strength, porosity, hydrophilicity, and in vitro cell experiments of the scaffolds were initially discussed. The results indicated that the newly developed PU/LC 3D composite scaffolds exhibited an LC state; the addition of an LC did not change the porosity after swelling while maintaining a high porosity; the compressive strength of the composite scaffolds decreased while still maintaining high mechanical properties and enhancing hydrophilicity. At the same time, it could improve the cell affinity on the surface of the material, which was beneficial to increase the cell adhesion rate and cell activity, promote the osteogenic differentiation of human mesenchymal stem cells grown on the materials, and improve the alkaline phosphatase activity, calcium nodules, and the expression of related osteogenic genes and proteins. These results demonstrated potential applications of PU/LC composite scaffolds in repairing or regeneration of bone tissue engineering.
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Affiliation(s)
- Weilong Xie
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, P. R. China
| | - Ruoran Ouyang
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, P. R. China
| | - Haoyu Wang
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, P. R. China
| | - Changren Zhou
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, P. R. China.,Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou 510632, P. R. China
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13
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Wang K, Qi Z, Pan S, Zheng S, Wang H, Chang Y, Li H, Xue P, Yang X, Fu C. Preparation, characterization and evaluation of a new film based on chitosan, arginine and gold nanoparticle derivatives for wound-healing efficacy. RSC Adv 2020; 10:20886-20899. [PMID: 35517756 PMCID: PMC9054353 DOI: 10.1039/d0ra03704d] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 05/25/2020] [Indexed: 01/08/2023] Open
Abstract
It is well-known that the combination of polymers and nanoparticles (NPs) provides optimised wound dressing and accelerates wound healing. The knowledge about the structure and properties of these materials is of critical importance in biological processes related to wound healing. In this study, we prepared a chitosan (CS) film modified with arginine (Arg) and gold NPs (AuNPs) and investigated its effectiveness as a dressing material for wound healing. Fourier-transform infrared spectroscopy (FTIR) confirmed that Arg was successfully grafted on CS. The resultant CS-Arg/AuNP film was then characterised by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The modification of Arg and AuNPs improved the hydrophilicity, mechanical strength and antibacterial properties of the film, which in turn provided an enhanced ideal environment for cell adhesion and proliferation. Cell Counting Kit-8 (CCK-8) was used to demonstrate the survival rate. Furthermore, the proteins involved in wound healing were evaluated qualitatively and quantitatively by immunofluorescence and western blotting, respectively. The skin defect models used for the in vivo studies revealed that the CS-Arg/AuNP dressing accelerated wound closure, re-epithelialization and collagen deposition. Our cumulative findings support the feasibility of using the proposed film as a promising candidate for tissue engineering of the skin in the near future. It is well-known that the combination of polymers and nanoparticles (NPs) provides optimised wound dressing and accelerates wound healing.![]()
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Affiliation(s)
- Kai Wang
- The Second Hospital of Jilin University
- Changchun
- China
| | - Zhiping Qi
- The Second Hospital of Jilin University
- Changchun
- China
| | - Su Pan
- The Second Hospital of Jilin University
- Changchun
- China
| | - Shuang Zheng
- The Second Hospital of Jilin University
- Changchun
- China
| | - Haosheng Wang
- The Second Hospital of Jilin University
- Changchun
- China
| | - YuXin Chang
- The Second Hospital of Jilin University
- Changchun
- China
| | - Hongru Li
- The Second Hospital of Jilin University
- Changchun
- China
| | - Pan Xue
- The Second Hospital of Jilin University
- Changchun
- China
| | - Xiaoyu Yang
- The Second Hospital of Jilin University
- Changchun
- China
| | - Chuan Fu
- The Second Hospital of Jilin University
- Changchun
- China
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14
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Mixed Modification of the Surface Microstructure and Chemical State of Polyetheretherketone to Improve Its Antimicrobial Activity, Hydrophilicity, Cell Adhesion, and Bone Integration. ACS Biomater Sci Eng 2019; 6:842-851. [DOI: 10.1021/acsbiomaterials.9b01148] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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15
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Zou F, Sun X, Wang X. Elastic, hydrophilic and biodegradable poly (1, 8-octanediol-co-citric acid)/polylactic acid nanofibrous membranes for potential wound dressing applications. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.05.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Yin D, Komasa S, Yoshimine S, Sekino T, Okazaki J. Effect of mussel adhesive protein coating on osteogenesis in vitro and osteointegration in vivo to alkali-treated titanium with nanonetwork structures. Int J Nanomedicine 2019; 14:3831-3843. [PMID: 31213804 PMCID: PMC6536716 DOI: 10.2147/ijn.s206313] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/17/2019] [Indexed: 11/23/2022] Open
Abstract
Purpose: On the basis of reasonable superposition of various surface treatment methods, alkali-treated titanium with nanonetwork structures (TNS) was coated with mussel adhesive protein (MAP) and named TNS-MAP. The aims were to optimize the biological properties of TNS, endue it with new properties, and enhance its utility in clinical dental applications. Methods: TNS disks were coated with MAP and the product surface was characterized. Its osteogenic properties were determined by evaluating its effects on cell adhesion, cell proliferation, the expression of osteogenesis-related genes, and in vivo experiments. Results: The treated materials showed excellent hydrophilicity, good surface roughness, and advantages of both TNS and MAP. TNS-MAP significantly promoted initial cell attachment especially after 15 mins and 30 mins. At every time point, cell adhesion and proliferation, the detection rate of osteogenesis-related markers in the extracellular matrix, and the expression of osteogenesis-related genes were markedly superior on TNS-MAP than the control. The in vivo experiments revealed that TNS-MAP promoted new bone growth around the implants and the bone-implant interface. Conclusion: We verified through in vitro and in vivo experiments that we successfully created an effective TNS-MAP composite implant with excellent biocompatibility and advantages of both its TNS and MAP parent materials. Therefore, the new biocomposite implant material TNS-MAP may potentially serve in practical dentistry and orthopedics.
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Affiliation(s)
- Derong Yin
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan
| | - Satoshi Komasa
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan
| | - Shigeki Yoshimine
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan
| | - Tohru Sekino
- Advanced Hard Materials, The Institute of Scientific and Industrial Research, Osaka University, Suita, Osaka, Japan
| | - Joji Okazaki
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan
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17
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Wang C, Yu Y, Chen H, Zhang S, Wang J, Liu C. Construction of cytokine reservoirs based on sulfated chitosan hydrogels for the capturing of VEGF in situ. J Mater Chem B 2019; 7:1882-1892. [PMID: 32255051 DOI: 10.1039/c8tb02895h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Nutrients and oxygen are delivered mainly by blood vessels to nourish the cells and tissues in the body. Thus, biomaterials are processed by loading cytokines, such as vascular endothelial growth factors (VEGF), to facilitate angiogenesis in order to accelerate tissue regeneration. Nevertheless, the unpredictable biosecurity of exogenous cytokines is still a controversial issue for its clinical application. In this study, we constructed a kind of cytokine reservoir utilizing the binding affinity between heparin-like sulfate polysaccharide and endogenous growth factors. Two types of sulfated chitosan hydrogels, namely 6-O-sulfated chitosan (6-O-SCS) and 2-N,6-O-sulfated chitosan (2-N,6-O-SCS) hydrogels, were formed on the surface of the gelatin sponge matrix. The microstructure of the SCS-coated scaffolds is porous and interconnected, which is beneficial for cellular infiltration. Besides, human umbilical vein endothelial cells (HUVECs) can adhere and proliferate well on the surface of the scaffolds. Notably, sulfated chitosan-coated scaffolds exhibit an ability to capture VEGF in vitro & vivo, especially for the 2-N,6-O-SCS-coated scaffold. It is also verified by mice models that sulfated chitosan-coated scaffolds result in a concentrated VEGF microenvironment in specific domains as cytokine reservoirs and induce mass microvessels after implantation into subcutaneous tissues. As such, the sulfated chitosan-coated scaffolds served as VEGF reservoirs to accelerate angiogenesis and wound healing. This beneficial strategy may be applicable to in situ tissue regeneration by capturing more cytokines and promoting healing.
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Affiliation(s)
- Chenmin Wang
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
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18
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Enhanced Tissue Compatibility of Polyetheretherketone Disks by Dopamine-Mediated Protein Immobilization. Macromol Res 2018. [DOI: 10.1007/s13233-018-6018-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Preparation and characterizations of a chitosan-based medium-density fiberboard adhesive with high bonding strength and water resistance. Carbohydr Polym 2017; 176:273-280. [DOI: 10.1016/j.carbpol.2017.08.100] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 07/23/2017] [Accepted: 08/19/2017] [Indexed: 11/21/2022]
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20
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Synthesis and characterization of curcumin loaded PLA—Hyperbranched polyglycerol electrospun blend for wound dressing applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:1196-1204. [DOI: 10.1016/j.msec.2017.03.200] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 02/07/2017] [Accepted: 03/21/2017] [Indexed: 01/10/2023]
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21
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Kwon GW, Gupta KC, Jung KH, Kang IK. Lamination of microfibrous PLGA fabric by electrospinning a layer of collagen-hydroxyapatite composite nanofibers for bone tissue engineering. Biomater Res 2017; 21:11. [PMID: 28620549 PMCID: PMC5470256 DOI: 10.1186/s40824-017-0097-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 06/05/2017] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND To mimic the muscle inspired cells adhesion through proteins secretion, the lamination of collagen-hydroxyapatite nanorod (nHA) composite nanofibers has been carried out successfully on polydopamine (PDA)-coated microfibrous polylactide-co-glycolide (PLGA) fabrics. The lamination of collagen-hydroxyapatite composite nanofibers on polydopamine-coated microfibrous PLGA fabrics was carried through electrospinning the solution of collagen containing L-glutamic acid-grafted hydroxyapatite nanorods (nHA-GA) at a flow rate of 1.5 mL/h and an applied voltage of 15 kV. RESULTS In comparison to pristine PLGA, dopamine-coated PLGA and collagen-hydroxyapatite composite nanofiber lamination has produced more wettable surfaces and surface wettability is found to higher with dopamine-coated PLGA fabrics then pristine PLGA. The SEM micrographs have clearly indicated that the lamination of polydopamine-coated PLGA fabric with collagen-hydroxyapatite composite nanofibers has shown increased adhesion of MC3T3E1 cells in comparison to pristine PLGA fabrics. CONCLUSION The results of these studies have clearly demonstrated that collagen-nHA composites fibers may be used to create bioactive 3D scaffolds using PLGA as an architectural support agent.
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Affiliation(s)
- Gi-Wan Kwon
- Department of Polymer Science and Engineering, Kyungpook National University, Daegu, 702-701 South Korea
| | - Kailash Chandra Gupta
- Department of Polymer Science and Engineering, Kyungpook National University, Daegu, 702-701 South Korea.,Polymer Research Laboratory, Department of Chemistry, I. I. T. Roorkee, Roorkee, 247 667 India
| | - Kyung-Hye Jung
- Department of Advanced Materials and Chemical Engineering,Catholic University of Daegu, Kyungsan, South Korea
| | - Inn-Kyu Kang
- Department of Polymer Science and Engineering, Kyungpook National University, Daegu, 702-701 South Korea
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22
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Influences of surface treatments with abrasive paper and sand-blasting on surface morphology, hydrophilicity, mineralization and osteoblasts behaviors of n-CS/PK composite. Sci Rep 2017; 7:568. [PMID: 28373673 PMCID: PMC5428562 DOI: 10.1038/s41598-017-00571-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 02/23/2017] [Indexed: 01/21/2023] Open
Abstract
The surfaces of nano-calcium silicate (n-CS)/polyetheretherketone (PK) composites were treated with abrasive paper and sand-blasting, and the surfaces performances of the as-treated composites were studied. The results showed that the surface roughness, hydrophilicity and mineralization of the simulated body fluid (SBF) of the composites surfaces were significantly improved, and the properties of the composites treated by with sand-blasting were better than those treated with abrasive paper. Moreover, the treated composites significantly promoted osteoblasts responses, such as cell attachment, spreading, proliferation and alkaline phosphatase (ALP) activity, compared to un-treated composites, and the cellular responses to the composites treated with sand-blasting were better than those treated with abrasive paper. The results suggested that surface treatment with sand-blasting was an effective method to greatly improve the surface bioperformances of the n-CS/PK composite, and this treated composite with improved bioactivity and cytocompatibility might be a promising implant material for orthopedic applications.
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23
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Improving Corrosion Resistance and Biocompatibility of Magnesium Alloy by Sodium Hydroxide and Hydrofluoric Acid Treatments. APPLIED SCIENCES-BASEL 2016. [DOI: 10.3390/app7010033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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24
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Improved antifouling properties and selective biofunctionalization of stainless steel by employing heterobifunctional silane-polyethylene glycol overlayers and avidin-biotin technology. Sci Rep 2016; 6:29324. [PMID: 27381834 PMCID: PMC4933944 DOI: 10.1038/srep29324] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/15/2016] [Indexed: 12/28/2022] Open
Abstract
A straightforward solution-based method to modify the biofunctionality of stainless steel (SS) using heterobifunctional silane-polyethylene glycol (silane-PEG) overlayers is reported. Reduced nonspecific biofouling of both proteins and bacteria onto SS and further selective biofunctionalization of the modified surface were achieved. According to photoelectron spectroscopy analyses, the silane-PEGs formed less than 10 Å thick overlayers with close to 90% surface coverage and reproducible chemical compositions. Consequently, the surfaces also became more hydrophilic, and the observed non-specific biofouling of proteins was reduced by approximately 70%. In addition, the attachment of E. coli was reduced by more than 65%. Moreover, the potential of the overlayer to be further modified was demonstrated by successfully coupling biotinylated alkaline phosphatase (bAP) to a silane-PEG-biotin overlayer via avidin-biotin bridges. The activity of the immobilized enzyme was shown to be well preserved without compromising the achieved antifouling properties. Overall, the simple solution-based approach enables the tailoring of SS to enhance its activity for biomedical and biotechnological applications.
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25
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Aldana A, Barrios B, Strumia M, Correa S, Martinelli M. Dendronization of chitosan films: Surface characterization and biological activity. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.01.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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García-Gallego S, Nyström AM, Malkoch M. Chemistry of multifunctional polymers based on bis-MPA and their cutting-edge applications. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2015.04.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Madhurakkat Perikamana SK, Lee J, Lee YB, Shin YM, Lee EJ, Mikos AG, Shin H. Materials from Mussel-Inspired Chemistry for Cell and Tissue Engineering Applications. Biomacromolecules 2015; 16:2541-55. [DOI: 10.1021/acs.biomac.5b00852] [Citation(s) in RCA: 218] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sajeesh Kumar Madhurakkat Perikamana
- Department
of Bioengineering, Institute for Bioengineering and Biopharmaceutical
Research, Hanyang University, Seoul 133-791, Republic of Korea
- BK21
Plus Future Biopharmaceutical Human Resources Training and Research
Team, Hanyang University, Seoul 133-791, Republic of Korea
| | - Jinkyu Lee
- Department
of Bioengineering, Institute for Bioengineering and Biopharmaceutical
Research, Hanyang University, Seoul 133-791, Republic of Korea
- BK21
Plus Future Biopharmaceutical Human Resources Training and Research
Team, Hanyang University, Seoul 133-791, Republic of Korea
| | - Yu Bin Lee
- Department
of Bioengineering, Institute for Bioengineering and Biopharmaceutical
Research, Hanyang University, Seoul 133-791, Republic of Korea
- BK21
Plus Future Biopharmaceutical Human Resources Training and Research
Team, Hanyang University, Seoul 133-791, Republic of Korea
| | - Young Min Shin
- Department
of Bioengineering, Institute for Bioengineering and Biopharmaceutical
Research, Hanyang University, Seoul 133-791, Republic of Korea
- BK21
Plus Future Biopharmaceutical Human Resources Training and Research
Team, Hanyang University, Seoul 133-791, Republic of Korea
| | - Esther J. Lee
- Department
of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Antonios G. Mikos
- Department
of Bioengineering, Rice University, Houston, Texas 77030, United States
- Department
of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77030, United States
| | - Heungsoo Shin
- Department
of Bioengineering, Institute for Bioengineering and Biopharmaceutical
Research, Hanyang University, Seoul 133-791, Republic of Korea
- BK21
Plus Future Biopharmaceutical Human Resources Training and Research
Team, Hanyang University, Seoul 133-791, Republic of Korea
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28
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de Jong ER, Deloch N, Knoll W, Turrin CO, Majoral JP, Caminade AM, Köper I. Synthesis and characterization of bifunctional dendrimers: preliminary use for the coating of gold surfaces and the proliferation of human osteoblasts (HOB). NEW J CHEM 2015. [DOI: 10.1039/c5nj00620a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dendrimers having one dithiolane and ammonium or carboxylate functions have been synthesized for coating gold surfaces interacting with human osteoblasts.
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Affiliation(s)
- Edwin R. de Jong
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - Nicole Deloch
- Max-Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Wolfgang Knoll
- Max-Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- Austrian Institute of Technology
- 1220 Vienna
| | - Cédric-Olivier Turrin
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - Jean-Pierre Majoral
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - Anne-Marie Caminade
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - Ingo Köper
- Max-Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- Flinders Centre for NanoScale Science and Technology
- School of Chemical and Physical Sciences
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29
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Lisse D, Richter CP, Drees C, Birkholz O, You C, Rampazzo E, Piehler J. Monofunctional stealth nanoparticle for unbiased single molecule tracking inside living cells. NANO LETTERS 2014; 14:2189-2195. [PMID: 24655019 DOI: 10.1021/nl500637a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
On the basis of a protein cage scaffold, we have systematically explored intracellular application of nanoparticles for single molecule studies and discovered that recognition by the autophagy machinery plays a key role for rapid metabolism in the cytosol. Intracellular stealth nanoparticles were achieved by heavy surface PEGylation. By combination with a generic approach for nanoparticle monofunctionalization, efficient labeling of intracellular proteins with high fidelity was accomplished, allowing unbiased long-term tracking of proteins in the outer mitochondrial membrane.
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Affiliation(s)
- Domenik Lisse
- Department of Biology, University of Osnabrück , Osnabrück, Germany
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30
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Carlmark A, Malmström E, Malkoch M. Dendritic architectures based on bis-MPA: functional polymeric scaffolds for application-driven research. Chem Soc Rev 2014; 42:5858-79. [PMID: 23628841 DOI: 10.1039/c3cs60101c] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Dendritic polymers are highly branched, globular architectures with multiple representations of functional groups. These nanoscale organic frameworks continue to fascinate researchers worldwide and are today under intensive investigation in application-driven research. A large number of potential application areas have been suggested for dendritic polymers, including theranostics, biosensors, optics, adhesives and coatings. The transition from potential to real applications is strongly dictated by their commercial accessibility, scaffolding ability as well as biocompatibility. A dendritic family that fulfills these requirements is based on the 2,2-bismethylolpropionic acid (bis-MPA) monomer. This critical review is the first of its kind to cover most of the research activities generated on aliphatic polyester dendritic architectures based on bis-MPA. It is apparent that these scaffolds will continue to be in the forefront of cutting-edge research as their structural variations are endless including dendrons, dendrimers, hyperbranched polymers, dendritic-linear hybrids and their hybridization with inorganic surfaces.
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Affiliation(s)
- Anna Carlmark
- KTH Royal Institute of Technology, School of Chemical Science and Engineering, Fibre and Polymer Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
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31
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Pan CJ, Hou YH, Zhang BB, Dong YX, Ding HY. Blood compatibility and interaction with endothelial cells of titanium modified by sequential immobilization of poly (ethylene glycol) and heparin. J Mater Chem B 2014; 2:892-902. [DOI: 10.1039/c3tb21403f] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Zhang Y, Zhao L, Chen M, Lang M. Synthesis and properties of Pluronic-based pentablock copolymers with pendant amino groups. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-012-2889-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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33
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Öberg K, Ropponen J, Kelly J, Löwenhielm P, Berglin M, Malkoch M. Templating gold surfaces with function: a self-assembled dendritic monolayer methodology based on monodisperse polyester scaffolds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:456-465. [PMID: 23214500 DOI: 10.1021/la3041314] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The antibiotic resistance developed among several pathogenic bacterial strains has spurred interest in understanding bacterial adhesion down to a molecular level. Consequently, analytical methods that rely on bioactive and multivalent sensor surfaces are sought to detect and suppress infections. To deliver functional sensor surfaces with an optimized degree of molecular packaging, we explore a library of compact and monodisperse dendritic scaffolds based on the nontoxic 2,2-bis(methylol)propionic acid (bis-MPA). A self-assembled dendritic monolayer (SADM) methodology to gold surfaces capitalizes on the design of aqueous soluble dendritic structures that bear sulfur-containing core functionalities. The nature of sulfur (either disulfide or thiol), the size of the dendritic framework (generation 1-3), the distance between the sulfur and the dendritic wedge (4 or 14 Å), and the type of functional end group (hydroxyl or mannose) were key structural elements that were identified to affect the packaging densities assembled on the surfaces. Both surface plasmon resonance (SPR) and resonance-enhanced surface impedance (RESI) experiments revealed rapid formation of homogenously covered SADMs on gold surfaces. The array of dendritic structures enabled the fabrication of functional gold surfaces displaying molecular covering densities of 0.33-2.2 molecules·nm(-2) and functional availability of 0.95-5.5 groups·nm(-2). The cell scavenging ability of these sensor surfaces for Escherichia coli MS7fim+ bacteria revealed 2.5 times enhanced recognition for G3-mannosylated surfaces when compared to G3-hydroxylated SADM surfaces. This promising methodology delivers functional gold sensor surfaces and represents a facile route for probing surface interactions between multivalently presented motifs and cells in a controlled surface setting.
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Affiliation(s)
- Kim Öberg
- Department of Fibre and Polymer Technology, School of Chemical Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Karagkiozaki V, Karagiannidis PG, Gioti M, Kavatzikidou P, Georgiou D, Georgaraki E, Logothetidis S. Bioelectronics meets nanomedicine for cardiovascular implants: PEDOT-based nanocoatings for tissue regeneration. Biochim Biophys Acta Gen Subj 2013; 1830:4294-304. [PMID: 23291427 DOI: 10.1016/j.bbagen.2012.12.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 12/13/2012] [Accepted: 12/18/2012] [Indexed: 11/17/2022]
Abstract
BACKGROUND An exciting direction in nanomedicine would be to analyze how living cells respond to conducting polymers. Their application for tissue regeneration may advance the performance of drug eluting stents by addressing the delayed stent re-endothelialization and late stent thrombosis. METHODS The suitability of poly (3, 4-ethylenedioxythiophene) (PEDOT) thin films for stents to promote cell adhesion and proliferation is tested in correlation with doping and physicochemical properties. PEDOT doped either with poly (styrenesulfonate) (PSS) or tosylate anion (TOS) was used for films' fabrication by spin coating and vapor phase polymerization respectively. PEGylation of PEDOT: TOS for reduced immunogenicity and biofunctionalization of PEDOT: PSS with RGD peptides for induced cell proliferation was further applied. Atomic Force Microscopy and Spectroscopic Ellipsometry were implemented for nanotopographical, structural, optical and conductivity measurements in parallel with wettability and protein adsorption studies. Direct and extract testing of cell viability and proliferation of L929 fibroblasts on PEDOT samples by MTT assay in line with SEM studies follow. RESULTS All PEDOT thin films are cytocompatible and promote human serum albumin adsorption. PEDOT:TOS films were found superior regarding cell adhesion as compared to controls. Their nanotopography and hydrophilicity are significant factors that influence cytocompatibility. PEGylation of PEDOT:TOS increases their conductivity and hydrophilicity with similar results on cell viability with bare PEDOT:TOS. The biofunctionalized PEDOT:PSS thin films show enhanced cell proliferation. CONCLUSIONS The application of PEDOT polymers has evolved as a new perspective to advance stents. GENERAL SIGNIFICANCE In this work, nanomedicine involving nanotools and novel nanomaterials merges with bioelectronics to stimulate tissue regeneration for cardiovascular implants. This article is part of a Special Issue entitled Organic Bioelectronics - Novel Applications in Biomedicine.
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Affiliation(s)
- V Karagkiozaki
- Lab for Thin Films-Nanosystems and Nanometrology LTFN, Physics Department, Aristotle University of Thessaloniki, GR-54124, Greece
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Li X, Luan S, Shi H, Yang H, Song L, Jin J, Yin J, Stagnaro P. Improved biocompatibility of poly (styrene-b-(ethylene-co-butylene)-b-styrene) elastomer by a surface graft polymerization of hyaluronic acid. Colloids Surf B Biointerfaces 2012; 102:210-7. [PMID: 23006563 DOI: 10.1016/j.colsurfb.2012.08.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 07/28/2012] [Accepted: 08/09/2012] [Indexed: 10/28/2022]
Abstract
Hyaluronic acid (HA) is an important component of extracellular matrix (ECM) in many tissues, providing a hemocompatible and supportive environment for cell growth. In this study, glycidyl methacrylate-hyaluronic acid (GMHA) was first synthesized and verified by proton nuclear magnetic resonance ((1)H NMR) spectroscopy. GMHA was then grafted to the surface of biomedical elastomer poly (styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) via an UV-initiated polymerization, monitored by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The further improvement of biocompatibility of the GMHA-modified SEBS films was assessed by platelet adhesion experiments and in vitro response of murine osteoblastic cell line MC-3T3-E1 with the virgin SEBS surface as the reference. It showed that the surface modification with HA strongly resisted platelet adhesion whereas improved cell-substrate interactions.
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Affiliation(s)
- Xiaomeng Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
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Hong SG, Kim GH. Mechanically improved electrospun PCL biocomposites reinforced with a collagen coating process: preparation, physical properties, and cellular activity. Bioprocess Biosyst Eng 2012; 36:205-14. [PMID: 22763777 DOI: 10.1007/s00449-012-0776-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 06/14/2012] [Indexed: 01/12/2023]
Abstract
In this work, we fabricated highly aligned electrospun poly(ε-caprolactone)(PCL)/collagen biocomposites, which were consisted of multi-layered structure. The aligned directions of the composites were controlled with two rotating collectors, and various weight fractions (1, 2, 3 wt%) of collagen were embedded between the mat of PCL microfibers to improve the mechanical property and biological activities of osteoblast-like cells (MG63). The PCL/collagen biocomposite showed nine times of increment in mechanical strength of random PCL/collagen composite. An increase in collagen content in the biocomposites displayed significant increase of mechanical properties, hydrophilic property, water-absorption ability, and even cell viability of osteoblast-like cells (MG63).
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Affiliation(s)
- Soon Gee Hong
- Department of Mechanical Engineering, Chosun University, Gwangju, South Korea
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Surface properties of amino-functionalized poly(ε-caprolactone) membranes and the improvement of human mesenchymal stem cell behavior. J Colloid Interface Sci 2012; 368:64-9. [DOI: 10.1016/j.jcis.2011.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 11/01/2011] [Accepted: 11/03/2011] [Indexed: 11/16/2022]
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Montañez MI, Hed Y, Utsel S, Ropponen J, Malmström E, Wågberg L, Hult A, Malkoch M. Bifunctional Dendronized Cellulose Surfaces as Biosensors. Biomacromolecules 2011; 12:2114-25. [DOI: 10.1021/bm200201y] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria I. Montañez
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
- F-IMABIS-Carlos Haya Hospital, Research Laboratory, 29009 Malaga, Spain
| | - Yvonne Hed
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
| | - Simon Utsel
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
| | - Jarmo Ropponen
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
| | - Eva Malmström
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
| | - Lars Wågberg
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
| | - Anders Hult
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
| | - Michael Malkoch
- KTH Royal Institute of Technology, School of Chemical Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
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Cheng Y, Zhao L, Li Y, Xu T. Design of biocompatible dendrimers for cancer diagnosis and therapy: current status and future perspectives. Chem Soc Rev 2011; 40:2673-703. [PMID: 21286593 DOI: 10.1039/c0cs00097c] [Citation(s) in RCA: 358] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In the past decade, nanomedicine with its promise of improved therapy and diagnostics has revolutionized conventional health care and medical technology. Dendrimers and dendrimer-based therapeutics are outstanding candidates in this exciting field as more and more biological systems have benefited from these starburst molecules. Anticancer agents can be either encapsulated in or conjugated to dendrimer and be delivered to the tumour via enhanced permeability and retention (EPR) effect of the nanoparticle and/or with the help of a targeting moiety such as antibody, peptides, vitamins, and hormones. Imaging agents including MRI contrast agents, radionuclide probes, computed tomography contrast agents, and fluorescent dyes are combined with the multifunctional nanomedicine for targeted therapy with simultaneous cancer diagnosis. However, an important question reported with dendrimer-based therapeutics as well as other nanomedicines to date is the long-term viability and biocompatibility of the nanotherapeutics. This critical review focuses on the design of biocompatible dendrimers for cancer diagnosis and therapy. The biocompatibility aspects of dendrimers such as nanotoxicity, long-term circulation, and degradation are discussed. The construction of novel dendrimers with biocompatible components, and the surface modification of commercially available dendrimers by PEGylation, acetylation, glycosylation, and amino acid functionalization have been proposed as available strategies to solve the safety problem of dendrimer-based nanotherapeutics. Also, exciting opportunities and challenges on the development of dendrimer-based nanoplatforms for targeted cancer diagnosis and therapy are reviewed (404 references).
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Affiliation(s)
- Yiyun Cheng
- School of Life Sciences, East China Normal University, Shanghai, 200062, People's Republic of China.
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Tria MCR, Grande CDT, Ponnapati RR, Advincula RC. Electrochemical Deposition and Surface-Initiated RAFT Polymerization: Protein and Cell-Resistant PPEGMEMA Polymer Brushes. Biomacromolecules 2010; 11:3422-31. [DOI: 10.1021/bm1009365] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Maria Celeste R. Tria
- Departments of Chemistry and Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
| | - Carlos David T. Grande
- Departments of Chemistry and Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
| | - Ramakrishna R. Ponnapati
- Departments of Chemistry and Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
| | - Rigoberto C. Advincula
- Departments of Chemistry and Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
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Yoon JA, Young T, Matyjaszewski K, Kowalewski T. Thermocurable hyperbranched polystyrenes for ultrathin polymer dielectrics. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2475-2480. [PMID: 20707329 DOI: 10.1021/am100463z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Thermocurable hyperbranched polystyrenes were successfully synthesized using atom transfer radical polymerization and exhibited superior ultrathin film formation capabilities in comparison with the linear analogues, as assessed by the minimal film thickness attainable by spin-coating without dewetting. They were suitable as ultrathin film organic dielectrics, with parallel plate specific capacitances as high as ∼680 nF/cm2. Similar to high performance inorganic dielectrics, capacitance measurements pointed to the presence of "dead" interfacial capacitance, which could be accounted for by considering the geometric effect of roughness "incommensurability" between metal electrode and polymer film.
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Affiliation(s)
- Jeong Ae Yoon
- Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
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Mechanical and biological characteristics of diamond-like carbon coated poly aryl-ether-ether-ketone. Biomaterials 2010; 31:8181-7. [PMID: 20692699 DOI: 10.1016/j.biomaterials.2010.07.054] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Accepted: 07/13/2010] [Indexed: 01/13/2023]
Abstract
Poly aryl-ether-ether-ketone (PEEK) is an alternative to metal alloys in orthopedic applications. Although the polymer provides many significant advantages such as excellent mechanical properties and non-toxicity, it suffers from insufficient elasticity and biocompatibility. Since the elastic modulus of diamond-like carbon (DLC) is closer to that of cortical bone than PEEK, the DLC/PEEK combination is expected to enhance the stability and surface properties of PEEK in bone replacements. In this work, PEEK is coated with diamond-like carbon (DLC) by plasma immersion ion implantation and deposition (PIII&D) to enhance the surface properties. X-ray photoelectron spectrometry (XPS), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy demonstrate successful deposition of the DLC film on PEEK without an obvious interface due to energetic ion bombardment. Atomic force microscopy (AFM) and contact angle measurements indicate changes in the surface roughness and hydrophilicity, and nanoindentation measurements reveal improved surface hardness on the DLC/PEEK. Cell viability assay, scanning electron microscopy (SEM), and real-time PCR analysis show that osteoblast attachment, proliferation, and differentiation are better on DLC/PEEK than PEEK. DLC/PEEK produced by PIII&D combines the advantages of DLC and PEEK and is more suitable for bone or cartilage replacements.
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Schrader S, Notara M, Beaconsfield M, Tuft SJ, Daniels JT, Geerling G. Tissue engineering for conjunctival reconstruction: established methods and future outlooks. Curr Eye Res 2010; 34:913-24. [PMID: 19958107 DOI: 10.3109/02713680903198045] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Reconstruction of the conjunctiva is an essential part of ocular surface regeneration, especially if an extensive area or the whole ocular surface is affected, such as in patients with ocular cicatricial pemphigoid, Stevens-Johnson syndrome, toxic epidermal necrolysis, or chemical/thermal burns. In these situations, corneal reconstruction almost inevitably fails unless the conjunctival surface is first repaired and a deep fornix is restored. The growing field of tissue engineering and advances in stem cell research offer promising new alternatives for these challenges. This article reviews the present approaches for reconstruction of the conjunctival surface, considering the established strategies and new potential methodologies.
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Affiliation(s)
- Stefan Schrader
- Cells for Sight Transplantation and Research Programme, Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK.
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Notara M, Alatza A, Gilfillan J, Harris AR, Levis HJ, Schrader S, Vernon A, Daniels JT. In sickness and in health: Corneal epithelial stem cell biology, pathology and therapy. Exp Eye Res 2010; 90:188-95. [PMID: 19840786 DOI: 10.1016/j.exer.2009.09.023] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Accepted: 09/30/2009] [Indexed: 12/12/2022]
Affiliation(s)
- M Notara
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, Cells for Sight Transplantation & Research Programme, 11-43 Bath Street, London EC1V 9EL, UK.
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Scharnagl N, Lee S, Hiebl B, Sisson A, Lendlein A. Design principles for polymers as substratum for adherent cells. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00997k] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Geisler M, Balzer BN, Hugel T. Polymer adhesion at the solid-liquid interface probed by a single-molecule force sensor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:2864-2869. [PMID: 19882687 DOI: 10.1002/smll.200901237] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A method based on atomic force microscopy is used to delineate the properties that determine single-molecule adhesion onto solid substrates in aqueous environment. Hydrophobicity as well as electrical properties of the substrate and the polymer are varied. In addition, the influence of the solvent composition, in particular the effect of ions, on the molecular adhesion at the solid-liquid interface is studied. Surprisingly, the polymer and surface-related properties account for only small changes in adhesion force, while dissolved ions show a much larger effect. These results point towards the energy of solvation as the most important contribution to adhesion for a wide variety of polymers and substrate materials.
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Affiliation(s)
- Michael Geisler
- IMETUM, Physics Department, CeNS and Center for Integrated Protein Science Munich, Technische Universität München, 85748 Garching, Germany
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Antharjanam PS, Jaseer M, Ragi K, Prasad E. Intrinsic luminescence properties of ionic liquid crystals based on PAMAM and PPI dendrimers. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2008.12.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Grin A, Sasson Y, Beyth S, Mosheiff R, Rachmilewitz J, Friedman M. In vitro study of a novel polymeric mesenchymal stem-cell coated membrane. J Drug Deliv Sci Technol 2009. [DOI: 10.1016/s1773-2247(09)50047-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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