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Jin X, Xie D, Zhang Z, Liu A, Wang M, Dai J, Wang X, Deng H, Liang Y, Zhao Y, Wen P, Li Y. In vitro and in vivo studies on biodegradable Zn porous scaffolds with a drug-loaded coating for the treatment of infected bone defect. Mater Today Bio 2024; 24:100885. [PMID: 38169782 PMCID: PMC10758886 DOI: 10.1016/j.mtbio.2023.100885] [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: 09/19/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 01/05/2024] Open
Abstract
Additively manufactured biodegradable zinc (Zn) scaffolds have great potential to repair infected bone defects due to their osteogenic and antibacterial properties. However, the enhancement of antibacterial properties depends on a high concentration of dissolved Zn2+, which in return deteriorates osteogenic activity. In this study, a vancomycin (Van)-loaded polydopamine (PDA) coating was prepared on pure Zn porous scaffolds to solve the above dilemma. Compared with pure Zn scaffolds according to comprehensive in vitro tests, the PDA coating resulted in a slow degradation and inhibited the excessive release of Zn2+ at the early stage, thus improving cytocompatibility and osteogenic activity. Meanwhile, the addition of Van drug substantially suppressed the attachment and proliferation of S. aureus and E. coli bacterial. Furthermore, in vivo implantation confirmed the simultaneously improved osteogenic and antibacterial functions by using the pure Zn scaffolds with Van-loaded PDA coating. Therefore, it is promising to employ biodegradable Zn porous scaffolds with the proposed drug-loaded coating for the treatment of infected bone defects.
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Affiliation(s)
- Xiang Jin
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Dongxu Xie
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhenbao Zhang
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Aobo Liu
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Menglin Wang
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Jiabao Dai
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Xuan Wang
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Huanze Deng
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Yijie Liang
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Yantao Zhao
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
- Senior Department of Orthopedics, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
- Beijing Engineering Research Center of Orthopedics Implants, Beijing, 100048, China
| | - Peng Wen
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yanfeng Li
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
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Corrosion Inhibition Coating Based on the Self-Assembled Polydopamine Films and Its Anti-Corrosion Properties. Polymers (Basel) 2022; 14:polym14040794. [PMID: 35215707 PMCID: PMC8875011 DOI: 10.3390/polym14040794] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/04/2022] [Accepted: 01/29/2022] [Indexed: 11/26/2022] Open
Abstract
Metal corrosion is becoming increasingly serious in oil and gas production, and one way to solve this problem is to modify the metal surface. Thus, a corrosion inhibition coating on the N80 steel was constructed via the self-polymerization and assembling of the dopamine. The optimum reaction condition of polydopamine films was determined by the corrosion rate assessment of the films coated N80 steel, which was the reaction at 60 °C and 5 g/L dopamine in the Tris-HCl buffer solution (pH = 8.5) for 1 h. The spectral results confirmed the existence of the polydopamine coating on the surface of N80 steel, and high stability of the coating in the oil well produced water was observed. The anti-corrosion performance of the polydopamine-coated N80 steel confirmed that high temperature accelerated the anti-corrosion effect of the coating, and the corrosion rate of N80 plate in 90 °C oil well produced water was 0.0591 mm·a−1, lower than the standard value. The corrosion rates of the polydopamine coated N80, A3 and J55 plates at 90 °C were 0.0541 mm·a−1, 0.0498 mm·a−1 and 0.0455 mm·a−1, respectively. No significant effects of the categories of corrosive medium and steel plate on the performance of the coating were observed.
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Song J, Lutz TM, Lang N, Lieleg O. Bioinspired Dopamine/Mucin Coatings Provide Lubricity, Wear Protection, and Cell-Repellent Properties for Medical Applications. Adv Healthc Mater 2021; 10:e2000831. [PMID: 32940004 DOI: 10.1002/adhm.202000831] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 08/09/2020] [Indexed: 01/12/2023]
Abstract
Even though medical devices have improved a lot over the past decades, there are still issues regarding their anti-biofouling properties and tribological performance, and both aspects contribute to the short- and long-term failure of these devices. Coating these devices with a biocompatible layer that reduces friction, wear, and biofouling at the same time would be a promising strategy to address these issues. Inspired by the adhesion mechanism employed by mussels, here, dopamine is made use of to immobilize lubricious mucin macromolecules onto both manufactured commercial materials and real medical devices. It is shown that purified mucins successfully adsorb onto a dopamine pre-coated substrate, and that this double-layer is stable toward mechanical challenges and storage in aqueous solutions. Moreover, the results indicate that the dopamine/mucin double-layer decreases friction (especially in the boundary lubrication regime), reduces wear damage, and provides anti-biofouling properties. The results obtained in this study show that such dopamine/mucin double-layer coatings can be powerful candidates for improving the surface properties of medical devices such as catheters, stents, and blood vessel substitutes.
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Affiliation(s)
- Jian Song
- Department of Mechanical Engineering and Munich School of Bioengineering Technical University of Munich 85748 Garching Germany
| | - Theresa M. Lutz
- Department of Mechanical Engineering and Munich School of Bioengineering Technical University of Munich 85748 Garching Germany
| | - Nora Lang
- Department of Pediatric Cardiology and Congenital Heart Disease, German Heart Center Munich Technical University of Munich 80636 Munich Germany
| | - Oliver Lieleg
- Department of Mechanical Engineering and Munich School of Bioengineering Technical University of Munich 85748 Garching Germany
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Zhang M, Zhang J, Chen J, Zeng Y, Zhu Z, Wan Y. Fabrication of Curcumin-Modified TiO 2 Nanoarrays via Cyclodextrin Based Polymer Functional Coatings for Osteosarcoma Therapy. Adv Healthc Mater 2019; 8:e1901031. [PMID: 31664793 DOI: 10.1002/adhm.201901031] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/23/2019] [Indexed: 12/29/2022]
Abstract
The incomplete removal of bone tumors leads to increased local recurrence and poor prognosis. To prevent ostoperative tumor recurrence and simultaneously repair surgery-caused bone defects, there is a need of great significance to develop implantable biomaterials possessing both cancer cell-killing ability and excellent bioactivity. In this work, a functionalized titanium-based implant is successfully fabricated by loading curcumin (CUR) onto cyclodextrin based polymer (pCD) modified titanium dioxide (TiO2 ) nanorod arrays. Herein, a polydopamine (pDA) assisted film is implemented as a first coating layer onto the surface of the TiO2 nanoarrays to guarantee the robust anchorage of the pCD. The pCD coating acts as a reservoir for CUR, allowing for efficient drug loading and sustained release of anticancer drugs. Studies show that the CUR-modified surfaces (TiO2 /pDA/pCD/CUR) can significantly promote apoptosis of osteosarcoma cells in vitro by inducing mitochondrial dysfunction caused by the ROS overproduction, and meanwhile, effectively inhibit the tumor growth in vivo. Moreover, such functionalized implants with surface density of loaded CUR at 22.48 µg cm-2 or lower support the attachment and proliferation of osteoblasts in vitro. These results successfully demonstrate that as-prepared TiO2 /pDA/pCD/CUR constructs have combined anticancer performance and good biocompatibility, which has great promise for the surgical therapy of bone tumors.
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Affiliation(s)
- Meng Zhang
- Institute of Nano‐Science and Nano‐TechnologyCollege of Physical Science and TechnologyCentral China Normal University Wuhan 430079 China
| | - Jiting Zhang
- Institute of Nano‐Science and Nano‐TechnologyCollege of Physical Science and TechnologyCentral China Normal University Wuhan 430079 China
| | - Jisheng Chen
- Institute of Nano‐Science and Nano‐TechnologyCollege of Physical Science and TechnologyCentral China Normal University Wuhan 430079 China
| | - Yan Zeng
- College of ChemistryCentral China Normal University Wuhan 430079 China
| | - Zhihong Zhu
- Institute of Nano‐Science and Nano‐TechnologyCollege of Physical Science and TechnologyCentral China Normal University Wuhan 430079 China
| | - Ying Wan
- College of Life Science and TechnologyHuazhong University of Science and Technology Wuhan 430074 China
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Giol ED, Van Vlierberghe S, Unger RE, Kersemans K, de Vos F, Kirkpatrick CJ, Dubruel P. Biomimetic strategy towards gelatin coatings on PET. Effect of protocol on coating stability and cell-interactive properties. J Mater Chem B 2019; 7:1258-1269. [PMID: 32255165 DOI: 10.1039/c8tb02676a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gelatin-modified poly(ethylene terephthalate) (PET) surfaces have been previously realized via an intermediate dopamine coating procedure that resulted in surfaces with superior haemocompatibility compared to unfunctionalized PET. The present study addresses the biocompatibility assessment of these coated PET surfaces. In this context, the stability of the gelatin coating upon exposure to physiological conditions and its cell-interactive properties were investigated. The proposed gelatin-dopamine-PET surfaces showed an increased protein coating stability up to 24 days and promoted the attachment and spreading of both endothelial cells (ECs) and smooth muscle cells (SMCs). In parallel, physisorbed gelatin coatings exhibited similar cell-interactive properties, albeit temporarily, as the coating delaminated within 1 week after cell seeding. Furthermore, no or only minimal immunogenic or inflammatory responses were observed during in vitro cytotoxicity and endotoxicity assessment for all gelatin-modified PET surfaces evaluated. Overall, the combined enhanced biocompatibility reported herein together with the previously proven haemocompatibility show the potential of the gelatin-dopamine-PET surfaces to function as vascular graft candidates.
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Affiliation(s)
- Elena Diana Giol
- Polymer Chemistry and Biomaterials Research (PBM) Group, Centre of Macromolecular Chemistry, Ghent University (UGent), Krijgslaan 281, S4-bis, B-9000, Ghent, Belgium.
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Ryu JH, Messersmith PB, Lee H. Polydopamine Surface Chemistry: A Decade of Discovery. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7523-7540. [PMID: 29465221 PMCID: PMC6320233 DOI: 10.1021/acsami.7b19865] [Citation(s) in RCA: 829] [Impact Index Per Article: 138.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Polydopamine is one of the simplest and most versatile approaches to functionalizing material surfaces, having been inspired by the adhesive nature of catechols and amines in mussel adhesive proteins. Since its first report in 2007, a decade of studies on polydopamine molecular structure, deposition conditions, and physicochemical properties have ensued. During this time, potential uses of polydopamine coatings have expanded in many unforeseen directions, seemingly only limited by the creativity of researchers seeking simple solutions to manipulating surface chemistry. In this review, we describe the current state of the art in polydopamine coating methods, describe efforts underway to uncover and tailor the complex structure and chemical properties of polydopamine, and identify emerging trends and needs in polydopamine research, including the use of dopamine analogs, nitrogen-free polyphenolic precursors, and improvement of coating mechanical properties.
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Affiliation(s)
- Ji Hyun Ryu
- Department of Carbon Fusion Engineering, Wonkwang University, Iksan, Jeonbuk 54538, South Korea
| | - Phillip B. Messersmith
- Departments of Bioengineering and Materials Science and Engineering, University of California, Berkeley, 210 Hearst Mining Building, Berkeley, California 94720-1760, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Road, Daejeon 34141, South Korea
- Center for Nature-inspired Technology (CNiT), KAIST Institute of NanoCentury, 291 University Road, Daejeon 34141, South Korea
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Zhang L, Zhou Q, Song W, Wu K, Zhang Y, Zhao Y. Dual-Functionalized Graphene Oxide Based siRNA Delivery System for Implant Surface Biomodification with Enhanced Osteogenesis. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34722-34735. [PMID: 28925678 DOI: 10.1021/acsami.7b12079] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Surface functionalization by small interfering RNA (siRNA) is a novel strategy for improved implant osseointegration. A gene delivery system with safety and high transfection activity is a crucial factor for an siRNA-functionalized implant to exert its biological function. To this end, polyethylene glycol (PEG) and polyethylenimine (PEI) dual-functionalized graphene oxide (GO; nGO-PEG-PEI) may present a promising siRNA vector. In this study, nanosized nGO-PEG-PEI was prepared and optimized for siRNA delivery. Titania nanotubes (NTs) fabricated by anodic oxidation were biomodified with nGO-PEG-PEI/siRNA by cathodic electrodeposition, designated as NT-GPP/siRNA. NT-GPP/siRNA possessed benign cytocompatibility, as evaluated by cell adhesion and proliferation. Cellular uptake and knockdown efficiency of the NT-GPP/siRNA were assessed by MC3T3-E1 cells, which exhibited high siRNA delivery efficiency and sustained target gene silencing. Casein kinase-2 interacting protein-1 (Ckip-1) is a negative regulator of bone formation. siRNA-targeting Ckip-1 (siCkip-1) was introduced to the implant, and a series of in vitro and in vivo experiments were carried out to evaluate the osteogenic capacity of NT-GPP/siCkip-1. NT-GPP/siCkip-1 dramatically improved the in vitro osteogenic differentiation of MC3T3-E1 cells in terms of improved osteogenesis-related gene expression, and increased alkaline phosphatase (ALP) production, collagen secretion, and extracellular matrix (ECM) mineralization. Moreover, NT-GPP/siCkip-1 led to apparently enhanced in vivo osseointegration, as indicated by histological staining and EDX line scanning. Collectively, these findings suggest that NT-GPP/siRNA represents a practicable and promising approach for implant functionalization, showing clinical potential for dental and orthopedic applications.
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Affiliation(s)
- Li Zhang
- The State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, and Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University , Xi'an 710032, China
| | - Qing Zhou
- Department of Pharmaceutical Analysis, School of Pharmacy, The Fourth Military Medical University , Xi'an 710032, China
| | - Wen Song
- The State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, and Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University , Xi'an 710032, China
| | - Kaimin Wu
- Department of Stomatology, 401 Military Hospital , Qingdao 266071, China
| | - Yumei Zhang
- The State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, and Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University , Xi'an 710032, China
| | - Yimin Zhao
- The State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, and Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University , Xi'an 710032, China
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Li M, Wu H, Wang Y, Yin T, Gregersen H, Zhang X, Liao X, Wang G. Immobilization of heparin/poly-l-lysine microspheres on medical grade high nitrogen nickel-free austenitic stainless steel surface to improve the biocompatibility and suppress thrombosis. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 73:198-205. [DOI: 10.1016/j.msec.2016.12.070] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 11/21/2016] [Accepted: 12/11/2016] [Indexed: 12/24/2022]
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Tasnim N, Kumar A, Joddar B. Attenuation of the in vitro neurotoxicity of 316L SS by graphene oxide surface coating. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 73:788-797. [PMID: 28183673 PMCID: PMC5312756 DOI: 10.1016/j.msec.2016.12.123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/07/2016] [Accepted: 12/22/2016] [Indexed: 12/17/2022]
Abstract
A persistent theme in biomaterials research comprises of surface engineering and modification of bare metallic substrates for improved cellular response and biocompatibility. Graphene Oxide (GO), a derivative of graphene, has outstanding chemical and mechanical properties; its large surface to volume ratio, ease of surface modification and processing make GO an attractive coating material. GO-coatings have been extensively studied as biosensors. Further owing to its surface nano-architecture, GO-coated surfaces promote cell adhesion and growth, making it suitable for tissue engineering applications. The need to improve the long-term durability and therapeutic effectiveness of commercially available bare 316L stainless steel (SS) surfaces led us to adopt a polymer-free approach which is cost-effective and scalable. GO was immobilized on to 316L SS utilizing amide linkage, to generate a strongly adherent uniform coating with surface roughness. GO-coated 316L SS surfaces showed increased hydrophilicity and biocompatibility with SHSY-5Y neuronal cells, which proliferated well and showed decreased reactive oxygen species (ROS) expression. In contrast, cells did not adhere to bare uncoated 316L SS meshes nor maintain viability when cultured in the vicinity of bare meshes. Therefore the combination of the improved surface properties and biocompatibility implies that GO-coating can be utilized to overcome pertinent limitations of bare metallic 316L SS implant surfaces, especially SS neural electrodes. Also, the procedure for making GO-based protective coatings can be applied to numerous other implants where the development of such protective films is necessary.
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Affiliation(s)
- Nishat Tasnim
- Department of Metallurgical, Materials Science and Biomedical Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA
| | - Alok Kumar
- Department of Metallurgical, Materials Science and Biomedical Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA
| | - Binata Joddar
- Department of Metallurgical, Materials Science and Biomedical Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
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Liu M, Zeng G, Wang K, Wan Q, Tao L, Zhang X, Wei Y. Recent developments in polydopamine: an emerging soft matter for surface modification and biomedical applications. NANOSCALE 2016; 8:16819-16840. [PMID: 27704068 DOI: 10.1039/c5nr09078d] [Citation(s) in RCA: 327] [Impact Index Per Article: 40.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
After more than four billion years of evolution, nature has created a large number of fascinating living organisms, which show numerous peculiar structures and wonderful properties. Nature can provide sources of plentiful inspiration for scientists to create various materials and devices with special functions and uses. Since Messersmith proposed the fabrication of multifunctional coatings through mussel-inspired chemistry, this field has attracted considerable attention for its promising and exiciting applications. Polydopamine (PDA), an emerging soft matter, has been demonstrated to be a crucial component in mussel-inspired chemistry. In this review, the recent developments of PDA for mussel-inspired surface modification are summarized and discussed. The biomedical applications of PDA-based materials are also highlighted. We believe that this review can provide important and timely information regarding mussel-inspired chemistry and will be of great interest for scientists in the chemistry, materials, biology, medicine and interdisciplinary fields.
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Affiliation(s)
- Meiying Liu
- Department of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China. Xiaoyongzhang@
| | - Guangjian Zeng
- Department of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China. Xiaoyongzhang@
| | - Ke Wang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing, 100084, P. R. China.
| | - Qing Wan
- Department of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China. Xiaoyongzhang@
| | - Lei Tao
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing, 100084, P. R. China.
| | - Xiaoyong Zhang
- Department of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China. Xiaoyongzhang@
| | - Yen Wei
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing, 100084, P. R. China.
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Nair BG, Hagiwara K, Ueda M, Yu HH, Tseng HR, Ito Y. High Density of Aligned Nanowire Treated with Polydopamine for Efficient Gene Silencing by siRNA According to Cell Membrane Perturbation. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18693-18700. [PMID: 27420034 DOI: 10.1021/acsami.6b04913] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
High aspect ratio nanomaterials, such as vertically aligned silicon nanowire (SiNW) substrates, are three-dimensional topological features for cell manipulations. A high density of SiNWs significantly affects not only cell adhesion and proliferation but also the delivery of biomolecules to cells. Here, we used polydopamine (PD) that simply formed a thin coating on various material surfaces by the action of dopamine as a bioinspired approach. The PD coating not only enhanced cell adhesion, spreading, and growth but also anchored more siRNA by adsorption and provided more surface concentration for substrate-mediated delivery. By comparing plain and SiNW surfaces with the same amount of loaded siRNA, we quantitatively found that PD coating efficiently anchored siRNA on the surface, which knocked down the expression of a specific gene by RNA interference. It was also found that the interaction of SiNWs with the cell membrane perturbed the lateral diffusion of lipids in the membrane by fluorescence recovery after photobleaching. The perturbation was considered to induce the effective delivery of siRNA into cells and allow the cells to carry out their biological functions. These results suggest promising applications of PD-coated, high-density SiNWs as simple, fast, and versatile platforms for transmembrane delivery of biomolecules.
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Affiliation(s)
- Baiju G Nair
- Nano Medical Engineering Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
| | - Kyoji Hagiwara
- Emergent Bioengineering Material Research Team, RIKEN Centre for Emergent Matter Science , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
- Laboratory of Human Science and Engineering , 1-3-1 Minaminagasaki, Toshima-ku, Tokyo 1710052, Japan
| | - Motoki Ueda
- Nano Medical Engineering Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
- Emergent Bioengineering Material Research Team, RIKEN Centre for Emergent Matter Science , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
| | - Hsiao-Hua Yu
- Nano Medical Engineering Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
- Institute of Chemistry, Academia Sinica , 128 Academia Road Sec. 2, Nankang, Taipei 115, Taiwan
| | - Hsian-Rong Tseng
- Department of Molecular and Medical Pharmacology, University of California , Los Angeles CNSI, 570 Westwood Plaza, Los Angeles, California 90095, United States
| | - Yoshihiro Ito
- Nano Medical Engineering Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
- Emergent Bioengineering Material Research Team, RIKEN Centre for Emergent Matter Science , 2-1 Hirosawa, Wako, Saitama 3510198, Japan
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Zhang C, He Y, Zhan Y, Zhang L, Shi H, Xu Z. Poly(dopamine) assisted epoxy functionalization of hexagonal boron nitride for enhancement of epoxy resin anticorrosion performance. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3877] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chunli Zhang
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Yi He
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Chengdu 610500 China
| | - Yingqing Zhan
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Lei Zhang
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Heng Shi
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Zhonghao Xu
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
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Mabrouk M, Choonara YE, Kumar P, Du Toit LC, Pillay V. The Influence of Lyophilized EmuGel Silica Microspheres on the Physicomechanical Properties, In Vitro Bioactivity and Biodegradation of a Novel Ciprofloxacin-Loaded PCL/PAA Scaffold. Polymers (Basel) 2016; 8:E232. [PMID: 30979327 PMCID: PMC6432423 DOI: 10.3390/polym8060232] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 06/06/2016] [Accepted: 06/09/2016] [Indexed: 01/20/2023] Open
Abstract
A new composite poly(caprolactone) (PCL) and poly(acrylic acid) (PAA) (PCL:PAA 1:5) scaffold was synthesized via dispersion of PCL particles into a PAA network. Silica microspheres (Si) (2⁻12 μm) were then prepared by a lyophilized micro-emulsion/sol-gel (Emugel) system using varying weight ratios. The model drug ciprofloxacin (CFX) was used for in situ incorporation into the scaffold. The physicochemical and thermal integrity, morphology and porosity of the system was analyzed by X-Ray Diffraction (XRD), Attenuated Total Refelctance Fourier Transform Infrared (ATR-FTIR), Differential Scanning Calorimetry (DSC), SEM, surface area analysis and liquid displacement, respectively. The mechanical properties of the scaffold were measured by textural analysis and in vitro bioactivity, biodegradation and pH variations were evaluated by XRD, FTIR and SEM after immersion in Simulated Body Fluid (SBF). The in vitro and in vivo studies of the prepared scaffold were considered as future aspects for this study. CFX release was determined in phosphate buffer saline (PBS) (pH 7.4; 37 °C). The incorporation of the Si microspheres and CFX into the scaffold was confirmed by XRD, FTIR, DSC and SEM, and the scaffold microstructure was dependent on the concentration of Si microspheres and the presence of CFX. The system displayed enhanced mechanical properties (4.5⁻14.73 MPa), in vitro bioactivity, biodegradation and controlled CFX release. Therefore, the PCL/PAA scaffolds loaded with Si microspheres and CFX with a porosity of up to 87% may be promising for bone tissue engineering.
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Affiliation(s)
- Mostafa Mabrouk
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
- Refractories, Ceramics and Building Materials Department, National Research Centre, 33El Bohouth St. (former El-Tahrir St.), Dokki, Giza, P.O. 12622, Egypt.
| | - Yahya Essop Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Lisa Claire Du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
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14
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Giol ED, Schaubroeck D, Kersemans K, De Vos F, Van Vlierberghe S, Dubruel P. Bio-inspired surface modification of PET for cardiovascular applications: Case study of gelatin. Colloids Surf B Biointerfaces 2015; 134:113-21. [DOI: 10.1016/j.colsurfb.2015.04.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 04/08/2015] [Accepted: 04/14/2015] [Indexed: 10/23/2022]
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15
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Lynge ME, Schattling P, Städler B. Recent developments in poly(dopamine)-based coatings for biomedical applications. Nanomedicine (Lond) 2015; 10:2725-42. [PMID: 26377046 DOI: 10.2217/nnm.15.89] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The success of polymer coatings for biomedical applications is undeniable. Among the very successful examples are poly(dopamine) (PDA) films due to their simplicity in deposition and beneficial interaction with biomolecules and cells. The aim of this review is to highlight the findings and achievement of PDA in nanomedicine since 2011. We discuss the progress that has been made to elucidate the structure of PDA and novel aspects considering the assembly of PDA-based films on diverse substrates. We highlight the newest results considering the biological evaluation PDA-based coatings to control cell behavior and the use of PDA in biosensing. The popularity of PDA remains unchanged, but the research efforts start to be consolidated toward more specific aims and clinical applications.
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Affiliation(s)
- Martin E Lynge
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Denmark
| | - Philipp Schattling
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Denmark
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Denmark
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16
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Song W, Song X, Yang C, Gao S, Klausen LH, Zhang Y, Dong M, Kjems J. Chitosan/siRNA functionalized titanium surface via a layer-by-layer approach for in vitro sustained gene silencing and osteogenic promotion. Int J Nanomedicine 2015; 10:2335-46. [PMID: 25848254 PMCID: PMC4378287 DOI: 10.2147/ijn.s76513] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Titanium surface modification is crucial to improving its bioactivity, mainly its bone binding ability in bone implant materials. In order to functionalize titanium with small interfering RNA (siRNA) for sustained gene silencing in nearby cells, the layer-by-layer (LbL) approach was applied using sodium hyaluronate and chitosan/siRNA (CS/siRNA) nanoparticles as polyanion and polycation, respectively, to build up the multilayered film on smooth titanium surfaces. The CS/siRNA nanoparticle characterization was analyzed first. Dynamic contact angle, atomic force microscopy, and scanning electron microscopy were used to monitor the layer accumulation. siRNA loaded in the film was quantitated and the release profile of film in phosphate-buffered saline was studied. In vitro knockdown effect and cytotoxicity evaluation of the film were investigated using H1299 human lung carcinoma cells expressing green fluorescent protein (GFP). The transfection of human osteoblast-like cell MG63 and H1299 were performed and the osteogenic differentiation of MG63 on LbL film was analyzed. The CS/siRNA nanoparticles exhibited nice size distribution. During formation of the film, the surface wettability, topography, and roughness were alternately changed, indicating successful adsorption of the individual layers. The scanning electron microscope images clearly demonstrated the hybrid structure between CS/siRNA nanoparticles and sodium hyaluronate polymer. The cumulated load of siRNA increased linearly with the bilayer number and, more importantly, a gradual release of the film allowed the siRNA to be maintained on the titanium surface over approximately 1 week. In vitro transfection revealed that the LbL film-associated siRNA could consistently suppress GFP expression in H1299 without showing significant cytotoxicity. The LbL film loading with osteogenic siRNA could dramatically increase the osteogenic differentiation in MG63. In conclusion, LbL technology can potentially modify titanium surfaces with specific gene-regulatory siRNAs to enhance biofunction.
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Affiliation(s)
- Wen Song
- State Key Laboratory of Military Stomatology, Department of Prosthetic Dentistry, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Xin Song
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus, Denmark
| | - Chuanxu Yang
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus, Denmark
| | - Shan Gao
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus, Denmark
| | | | - Yumei Zhang
- State Key Laboratory of Military Stomatology, Department of Prosthetic Dentistry, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus, Denmark
| | - Jørgen Kjems
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus, Denmark
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17
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Song W, Zhao L, Fang K, Chang B, Zhang Y. Biofunctionalization of titanium implant with chitosan/siRNA complex through loading-controllable and time-saving cathodic electrodeposition. J Mater Chem B 2015; 3:8567-8576. [DOI: 10.1039/c5tb01062d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
For the first time, siRNA has been cathodically electrodeposited on a titanium surface for efficient target gene silencing.
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Affiliation(s)
- Wen Song
- State key Laboratory of Military Stomatology
- Department of Prosthetic Dentistry
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032
| | - Lingzhou Zhao
- State key Laboratory of Military Stomatology
- Department of Periodontology
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032
| | - Kaixiu Fang
- State key Laboratory of Military Stomatology
- Department of Implant Dentistry
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032
| | - Bei Chang
- State key Laboratory of Military Stomatology
- Department of Prosthetic Dentistry
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032
| | - Yumei Zhang
- State key Laboratory of Military Stomatology
- Department of Prosthetic Dentistry
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032
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18
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Liu T, Liu Y, Chen Y, Liu S, Maitz MF, Wang X, Zhang K, Wang J, Wang Y, Chen J, Huang N. Immobilization of heparin/poly-(L)-lysine nanoparticles on dopamine-coated surface to create a heparin density gradient for selective direction of platelet and vascular cells behavior. Acta Biomater 2014; 10:1940-54. [PMID: 24342042 DOI: 10.1016/j.actbio.2013.12.013] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/22/2013] [Accepted: 12/09/2013] [Indexed: 12/23/2022]
Abstract
Restenosis, thrombosis formation and delayed endothelium regeneration continue to be problematic for coronary artery stent therapy. To improve the hemocompatibility of the cardiovascular implants and selectively direct vascular cell behavior, a novel kind of heparin/poly-l-lysine (Hep/PLL) nanoparticle was developed and immobilized on a dopamine-coated surface. The stability and structural characteristics of the nanoparticles changed with the Hep:PLL concentration ratio. A Hep density gradient was created on a surface by immobilizing nanoparticles with various Hep:PLL ratios on a dopamine-coated surface. Antithrombin III binding quantity was significantly enhanced, and in plasma the APTT and TT times as coagulation tests were prolonged, depending on the Hep density. A low Hep density is sufficient to prevent platelet adhesion and activation. The sensitivity of vascular cells to the Hep density is very different: high Hep density inhibits the growth of all vascular cells, while low Hep density could selectively inhibit smooth muscle cell hyperplasia but promote endothelial progenitor cells and endothelial cell proliferation. These observations provide important guidance for modification of surface heparinization. We suggest that this method will provide a potential means to construct a suitable platform on a stent surface for selective direction of vascular cell behavior with low side effects.
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Affiliation(s)
- Tao Liu
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Yang Liu
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Yuan Chen
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Shihui Liu
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China; Naton Medical Group, Peking 100082, People's Republic of China
| | - Manfred F Maitz
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China; Leibniz Institute of Polymer Research Dresden, Max Bergmann Center of Biomaterials, Hohe Str. 06, 01069 Dresden, Germany
| | - Xue Wang
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Kun Zhang
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Jian Wang
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Yuan Wang
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Junying Chen
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
| | - Nan Huang
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
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19
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Sobocinski J, Laure W, Taha M, Courcot E, Chai F, Simon N, Addad A, Martel B, Haulon S, Woisel P, Blanchemain N, Lyskawa J. Mussel inspired coating of a biocompatible cyclodextrin based polymer onto CoCr vascular stents. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3575-3586. [PMID: 24533838 DOI: 10.1021/am405774v] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
During the past decade, drug-eluting stents (DES) have been widely used for the treatment of occlusive coronary artery diseases. They are supposed to reduce the incidence of early in-stent restenosis by the elution of highly hydrophobic antiproliferative drugs. Nevertheless, the absence of long-term activity of these devices is responsible for late acute thrombosis probably due to the delayed re-endothelialization of the arterial wall over the bare metallic stent struts. Thus, a new generation of DES with a sustained release of therapeutic agents is required to improve long-term results of these devices. In this article, we report an original functionalization of CoCr vascular devices with a hydrophilic, biocompatible and biodegradable cyclodextrins based polymer which acts as a reservoir for lipophilic drugs allowing the sustained release of antiproliferative drugs. In this setting, polydopamine (PDA), a strong adhesive biopolymer, was applied as a first coating layer onto the surface of the metallic CoCr device in order to promote the strong anchorage of a cyclodextrin polymer. This polymer was generated "in situ" from the methylated cyclodextrins and citric acid as a cross-linking agent through a polycondensation reaction. After optimization of the grafting process, the amount of cyclodextrin polymer coated onto the CoCr device was quantified by colorimetric titrations and the resulting film was characterized by scanning electron microscopy (SEM) investigations. The cytocompatibility of the resulting coated film was assessed by cell proliferation and vitality tests. Finally, the ability of this coated device to act as a drug-eluting system was evaluated with paclitaxel, a strong hydrophobic antiproliferative drug, a reference drug used in current vascular drug-eluting stents.
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Liu Y, Ai K, Lu L. Polydopamine and Its Derivative Materials: Synthesis and Promising Applications in Energy, Environmental, and Biomedical Fields. Chem Rev 2014; 114:5057-115. [DOI: 10.1021/cr400407a] [Citation(s) in RCA: 3219] [Impact Index Per Article: 321.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yanlan Liu
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Kelong Ai
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Lehui Lu
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
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21
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Immobilization of bone morphogenetic protein on DOPA- or dopamine-treated titanium surfaces to enhance osseointegration. BIOMED RESEARCH INTERNATIONAL 2013; 2013:265980. [PMID: 24459666 PMCID: PMC3888698 DOI: 10.1155/2013/265980] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 11/16/2013] [Accepted: 11/25/2013] [Indexed: 01/31/2023]
Abstract
Titanium was treated with 3,4-dihydroxy-L-phenylalanine (DOPA) or dopamine to immobilize bone morphogenetic protein-2 (BMP2), a biomolecule. DOPA and dopamine solutions turned into suspensions, and precipitates were produced at high pH. Both treatments produced a brown surface on titanium that was thicker at high pH than low pH. Dopamine produced a thicker layer than DOPA. The hydrophobicity of the surfaces increased after treatment with dopamine independent of pH. Furthermore, there were more amino groups in the layers formed at pH 8.5 than pH 4.5 in both treatments. Dopamine treatment produced more amino groups in the layer than DOPA. BMP2 was immobilized on the treated surfaces via a coupling reaction using carbodiimide. More BMP2 was immobilized on surfaces treated at pH 8.5 than pH 4.5 in both treatments. The immobilized BMP induced specific signal transduction and alkali phosphatase, a differentiation marker. Thus, the present study demonstrates that titanium treated with DOPA or dopamine can become bioactive via the surface immobilization of BMP2, which induces specific signal transduction.
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22
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Nurunnabi M, Khatun Z, Nafiujjaman M, Lee DG, Lee YK. Surface coating of graphene quantum dots using mussel-inspired polydopamine for biomedical optical imaging. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8246-8253. [PMID: 23879568 DOI: 10.1021/am4023863] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Because of the superiority of GQDs (graphene quantum dots) in biomedical imaging, in terms of biocompatibility and toxicity of semiconductor quantum dots, GQDs bring new opportunities for the diagnosis and detection of diseases. In this study, we synthesized photoluminescent (PL) graphene quantum dots (GQDs) through a simple exfoliation and oxidation process, and then coated them with polydopamine (pDA) for enhanced stability in water and low toxicity in vivo. From the results, the GQDs coated with pDA showed an excellent stability of PL intensity. It showed that the PL intensity of noncoated GQDs in PBS solution rapidly decreased with time, resulting in a 45% reduction of the PL intensity for 14 days of incubation in PBS solution. After coating with polydopamine, PL intensities of polydopamine-coated GQDs was maintained more stably for 14 days compared with uncoated GQDs. We have observed the in vitro and in vivo biocompatibility of pDA-coated GQDs in nude mice. The overall observation revealed that pDA-coated GQDs could be used as a long-term optical imaging agent as well as a biocompatible drug carrier.
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Affiliation(s)
- Md Nurunnabi
- Department of Polymer Science and Engineering, Korea National University of Transportation, Chungju, 380-702 Republic of Korea
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Bio-orthogonal and combinatorial approaches for the design of binding growth factors. Biomaterials 2013; 34:7565-74. [PMID: 23859658 DOI: 10.1016/j.biomaterials.2013.06.037] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Accepted: 06/23/2013] [Indexed: 11/22/2022]
Abstract
Merrifield chemistry enables the convenient synthesis of oligonucleotides and peptides, while recombinant DNA technology has facilitated protein engineering. Recently, protein engineering has been extended into bio-orthogonal protein engineering by the development of specific chemical or enzymatic modification technologies. The combinatorial approach of molecular evolutionary engineering (or in vitro selection) has also provided a new design tool for functional peptides. These methodologies have enabled the development of various new proteinaceous materials for biological and medical applications. Here, we will discuss recent progress in the molecular design of proteins with respect to the preparation of binding growth factors, which are of increasing importance in the biomaterials field.
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