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Bose S, Sarkar N, Jo Y. Natural medicine delivery from 3D printed bone substitutes. J Control Release 2024; 365:848-875. [PMID: 37734674 PMCID: PMC11147672 DOI: 10.1016/j.jconrel.2023.09.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 09/11/2023] [Accepted: 09/14/2023] [Indexed: 09/23/2023]
Abstract
Unmet medical needs in treating critical-size bone defects have led to the development of numerous innovative bone tissue engineering implants. Although additive manufacturing allows flexible patient-specific treatments by modifying topological properties with various materials, the development of ideal bone implants that aid new tissue regeneration and reduce post-implantation bone disorders has been limited. Natural biomolecules are gaining the attention of the health industry due to their excellent safety profiles, providing equivalent or superior performances when compared to more expensive growth factors and synthetic drugs. Supplementing additive manufacturing with natural biomolecules enables the design of novel multifunctional bone implants that provide controlled biochemical delivery for bone tissue engineering applications. Controlled release of naturally derived biomolecules from a three-dimensional (3D) printed implant may improve implant-host tissue integration, new bone formation, bone healing, and blood vessel growth. The present review introduces us to the current progress and limitations of 3D printed bone implants with drug delivery capabilities, followed by an in-depth discussion on cutting-edge technologies for incorporating natural medicinal compounds embedded within the 3D printed scaffolds or on implant surfaces, highlighting their applications in several pre- and post-implantation bone-related disorders.
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Affiliation(s)
- Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States.
| | - Naboneeta Sarkar
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States
| | - Yongdeok Jo
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States
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2
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Moradi MR, Salahinejad E, Sharifi E, Tayebi L. Controlled drug delivery from chitosan-coated heparin-loaded nanopores anodically grown on nitinol shape-memory alloy. Carbohydr Polym 2023; 314:120961. [PMID: 37173015 PMCID: PMC10585653 DOI: 10.1016/j.carbpol.2023.120961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 04/12/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
Nitinol (NiTi shape-memory alloy) is an interesting candidate in various medical applications like dental, orthopedic, and cardiovascular devices, owing to its unique mechanical behaviors and proper biocompatibility. The aim of this work is the local controlled delivery of a cardiovascular drug, heparin, loaded onto nitinol treated by electrochemical anodizing and chitosan coating. In this regard, the structure, wettability, drug release kinetics, and cell cytocompatibility of the specimens were analyzed in vitro. The two-stage anodizing process successfully developed a regular nanoporous layer of Ni-Ti-O on nitinol, which considerably decreased the sessile water contact angle and induced hydrophilicity. The application of the chitosan coatings controlled the release of heparin mainly by a diffusional mechanism, where the drug release mechanisms were evaluated by the Higuchi, first-order, zero-order, and Korsmeyer-Pepass models. Human umbilical cord endothelial cells (HUVECs) viability assay also showed the non-cytotoxicity of the samples, so that the best performance was found for the chitosan-coated samples. It is concluded that the designed drug delivery systems are promising for cardiovascular, particularly stent applications.
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Affiliation(s)
- M R Moradi
- Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - E Salahinejad
- Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran.
| | - E Sharifi
- Department of Tissue Engineering and Biomaterials, School of Advanced Medical Sciences and Technologies, Hamadan University of Medical Sciences, Hamadan, Iran
| | - L Tayebi
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
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3
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Barchiesi E, Wareing T, Desmond L, Phan AN, Gentile P, Pontrelli G. Characterization of the Shells in Layer-By-Layer Nanofunctionalized Particles: A Computational Study. Front Bioeng Biotechnol 2022; 10:888944. [PMID: 35845400 PMCID: PMC9280187 DOI: 10.3389/fbioe.2022.888944] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/09/2022] [Indexed: 11/26/2022] Open
Abstract
Drug delivery carriers are considered an encouraging approach for the localized treatment of disease with minimum effect on the surrounding tissue. Particularly, layer-by-layer releasing particles have gained increasing interest for their ability to develop multifunctional systems able to control the release of one or more therapeutical drugs and biomolecules. Although experimental methods can offer the opportunity to establish cause and effect relationships, the data collection can be excessively expensive or/and time-consuming. For a better understanding of the impact of different design conditions on the drug-kinetics and release profile, properly designed mathematical models can be greatly beneficial. In this work, we develop a continuum-scale mathematical model to evaluate the transport and release of a drug from a microparticle based on an inner core covered by a polymeric shell. The present mathematical model includes the dissolution and diffusion of the drug and accounts for a mechanism that takes into consideration the drug biomolecules entrapped into the polymeric shell. We test a sensitivity analysis to evaluate the influence of changing the model conditions on the total system behavior. To prove the effectiveness of this proposed model, we consider the specific application of antibacterial treatment and calibrate the model against the data of the release profile for an antibiotic drug, metronidazole. The results of the numerical simulation show that ∼85% of the drug is released in 230 h, and its release is characterized by two regimes where the drug dissolves, diffuses, and travels the external shell layer at a shorter time, while the drug is released from the shell to the surrounding medium at a longer time. Within the sensitivity analysis, the outer layer diffusivity is more significant than the value of diffusivity in the core, and the increase of the dissolution parameters causes an initial burst release of the drug. Finally, changing the shape of the particle to an ellipse produces an increased percentage of drugs released with an unchanged release time.
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Affiliation(s)
- E. Barchiesi
- Instituto de Investigación Cientifica, Universidad de Lima, Lima, Peru
- École Nationale d’Ingénieurs de Brest, Brest, France
| | - T. Wareing
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - L. Desmond
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - A. N. Phan
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - P. Gentile
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
- *Correspondence: P. Gentile, ; G. Pontrelli,
| | - G. Pontrelli
- Istituto per le Applicazioni del Calcolo-CNR, Rome, Italy
- *Correspondence: P. Gentile, ; G. Pontrelli,
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Wang S, Ou X, Yi M, Li J. Spontaneous desorption of protein from self-assembled monolayer (SAM)-coated gold nanoparticles induced by high temperature. Phys Chem Chem Phys 2022; 24:2363-2370. [PMID: 35018922 DOI: 10.1039/d1cp04000f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nonspecific binding of proteins with nanomaterials (NMs) is a dynamic reversible process including both protein adsorption and desorption parts, which is crucial for controlled release of protein drug loaded by nanocarriers. The nonspecific binding of proteins is susceptible to high temperature, whereas its underlying mechanism still remains elusive. Here, the binding behavior of human serum albumin (HSA) with an amino-terminated self-assembled monolayer (SAM)-coated gold (111) surface was investigated by using molecular dynamics (MD) simulations. HSA binds to the SAM surface through salt bridges at 300 K. As the temperature increases to 350 K, HSA maintains its native structure, while the salt bridges largely diminish owing to the considerable lateral diffusion of HSA on the SAM. Moreover, the interfacial water located between HSA and the SAM gets increased and prevents the reformation of the salt bridges of HSA with the SAM, which reduces the binding affinity of HSA. And HSA eventually desorbs from the SAM. The depiction of thermally induced spontaneous protein desorption enriches our understanding of reversible binding behavior of protein with NMs, and may provide new insights into the controlled release of protein drugs delivered by using nanocarriers under the regulation of high temperature.
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Affiliation(s)
- Shuai Wang
- College of informatics, Huazhong Agricultural University, Wuhan 430070, China.,Department of Physics, Zhejiang University, Hangzhou 310027, China.
| | - Xinwen Ou
- Department of Physics, Zhejiang University, Hangzhou 310027, China.
| | - Ming Yi
- School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China.
| | - Jingyuan Li
- Department of Physics, Zhejiang University, Hangzhou 310027, China.
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Mayilswamy N, Boney N, Kandasubramanian B. Fabrication and molecular dynamics studies of layer-by-layer polyelectrolytic films. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110945] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Mamidi N, Velasco Delgadillo RM, Gonzáles Ortiz A, Barrera EV. Carbon Nano-Onions Reinforced Multilayered Thin Film System for Stimuli-Responsive Drug Release. Pharmaceutics 2020; 12:E1208. [PMID: 33322120 PMCID: PMC7764530 DOI: 10.3390/pharmaceutics12121208] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 01/15/2023] Open
Abstract
Herein, poly (N-(4-aminophenyl) methacrylamide))-carbon nano-onions (PAPMA-CNOs = f-CNOs) and anilinated-poly (ether ether ketone) (AN-PEEK) have synthesized, and AN-PEEK/f-CNOs composite thin films were primed via layer-by-layer (LbL) self-assembly for stimuli-responsive drug release. The obtained thin films exhibited pH-responsive drug release in a controlled manner; pH 4.5 = 99.2% and pH 6.5 = 59.3% of doxorubicin (DOX) release was observed over 15 days. Supramolecular π-π stacking interactions between f-CNOs and DOX played a critical role in controlling drug release from thin films. Cell viability was studied with human osteoblast cells and augmented viability was perceived. Moreover, the thin films presented 891.4 ± 8.2 MPa of the tensile strength (σult), 43.2 ± 1.1 GPa of Young's modulus (E), and 164.5 ± 1.7 Jg-1 of toughness (K). Quantitative scrutiny revealed that the well-ordered aligned nanofibers provide critical interphase, and this could be responsible for augmented tensile properties. Nonetheless, a pH-responsive and mechanically robust biocompatible thin-film system may show potential applications in the biomedical field.
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Affiliation(s)
- Narsimha Mamidi
- Department of Chemistry and Nanotechnology, School of Engineering and Sciences, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey NL-64849, Mexico; (R.M.V.D.); (A.G.O.)
| | - Ramiro Manuel Velasco Delgadillo
- Department of Chemistry and Nanotechnology, School of Engineering and Sciences, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey NL-64849, Mexico; (R.M.V.D.); (A.G.O.)
| | - Aldo Gonzáles Ortiz
- Department of Chemistry and Nanotechnology, School of Engineering and Sciences, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey NL-64849, Mexico; (R.M.V.D.); (A.G.O.)
| | - Enrique V. Barrera
- Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77005, USA;
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A facile surface modification of poly(dimethylsiloxane) with amino acid conjugated self-assembled monolayers for enhanced osteoblast cell behavior. Colloids Surf B Biointerfaces 2020; 196:111343. [PMID: 32896827 DOI: 10.1016/j.colsurfb.2020.111343] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/12/2020] [Accepted: 08/19/2020] [Indexed: 01/09/2023]
Abstract
Polydimethylsiloxane (PDMS) is a biocompatible synthetic polymer and used in various applications due to its low toxicity and tunable surface properties. However, PDMS does not have any chemical cues for cell binding. Plasma treatment, protein coating or surface modification with various molecules have been used to improve its surface characteristics. Still, these techniques are either last for a very limited time or have very complicated experimental procedures. In the present study, simple and one-step surface modification of PDMS is successfully accomplished by the preparation of hydrophilic and hydrophobic amino acid conjugated self-assembled monolayers (SAMs) for enhanced interactions at the cell-substrate interface. Synthesis of histidine and leucine conjugated (3-aminopropyl)-triethoxysilane (His-APTES and Leu-APTES) were confirmed with proton nuclear magnetic resonance spectroscopy (1H NMR) and optimum conditions for the modification of PDMS with SAMs were investigated by X-ray photoelectron spectroscopy (XPS) analysis, combined with water contact angle (WCA) measurements. Results indicated that both SAMs enhanced cellular behavior in vitro. Furthermore, hydrophilic His-APTES modification provides a superior environment for the osteoblast maturation with higher alkaline phosphatase activity and mineralization. As histidine, leucine, and functional groups of these SAMs are naturally found in biological systems, modification of PDMS with them increases its cell-substrate surface biomimetic properties. This study establishes a successful modification of PDMS for in vitro cell studies, offering a biomimetic and easy procedure for potential applications in microfluidics, cell-based therapies, or drug investigations.
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Cho C, Son J. Organic Thermoelectric Multilayers with High Stretchiness. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 10:E41. [PMID: 31878005 PMCID: PMC7023331 DOI: 10.3390/nano10010041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 12/20/2019] [Accepted: 12/21/2019] [Indexed: 11/16/2022]
Abstract
A stretchable organic thermoelectric multilayer is achieved by alternately depositing bilayers (BL) of 0.1 wt% polyethylene oxide (PEO) and 0.03 wt% double walled carbon nanotubes (DWNT), dispersed with 0.1 wt% polyacrylic acid (PAA), by the layer-by-layer assembly technique. A 25 BL thin film (~500 nm thick), composed of a PEO/DWNT-PAA sequence, displays electrical conductivity of 19.6 S/cm and a Seebeck coefficient of 60 µV/K, which results in a power factor of 7.1 µW/m·K2. The resultant nanocomposite exhibits a crack-free surface up to 30% strain and retains its thermoelectric performance, decreasing only 10% relative to the unstretched one. Even after 1000 cycles of bending and twisting, the thermoelectric behavior of this nanocomposite is stable. The synergistic combination of the elastomeric mechanical properties (originated from PEO/PAA systems) and thermoelectric behaviors (resulting from a three-dimensional conjugated network of DWNT) opens up the possibility of achieving various applications such as wearable electronics and sensors that require high mechanical compliance.
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Affiliation(s)
- Chungyeon Cho
- Department of Carbon Convergence Engineering, College of Engineering, Wonkwang University, Iksan 54538, Jeonbuk, Korea;
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10
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Bhadra P, Siu SWI. Refined Empirical Force Field to Model Protein-Self-Assembled Monolayer Interactions Based on AMBER14 and GAFF. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9622-9633. [PMID: 31246036 DOI: 10.1021/acs.langmuir.9b01367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Understanding protein interaction with material surfaces is important for the development of nanotechnological devices. The structures and dynamics of proteins can be studied via molecular dynamics (MD) if the protein-surface interactions can be accurately modeled. To answer this question, we computed the adsorption free energies of peptides (representing eleven different amino acids) on a hydrophobic self-assembled monolayer (CH3-SAM) and compared them to the benchmark experimental data set. Our result revealed that existing biomolecular force fields, GAFF and AMBER ff14sb, cannot reproduce the experimental peptide adsorption free energies by Wei and Latour (Langmuir, 2009, 25, 5637-5646). To obtain the improved force fields, we systematically tuned the Lennard-Jones parameters of selected amino acid sidechains and the functional group of SAM with repeated metadynamics and umbrella sampling simulations. The final parameter set has yielded a significant improvement in the free energy values with R = 0.83 and MSE = 0.65 kcal/mol. We applied the refined force field to predict the initial adsorption orientation of lysozyme on CH3-SAM. Two major orientations-face-down and face-up-were predicted. Our analysis on the protein structure, solvent accessible surface area, and binding of native ligand NAG3 suggested that lysozyme in the face-up orientation can remain active after initial adsorption. However, because of its weaker affinity (ΔΔG = 7.86 kcal/mol) for the ligand, the bioactivity of the protein is expected to reduce. Our work facilitates the use of MD for the study of protein-SAM systems. The refined force field compatible with GROMACS is available at https://cbbio.cis.um.edu.mo/software/SAMFF .
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Affiliation(s)
- Pratiti Bhadra
- Department of Computer and Information Science , University of Macau , Avenida da Universidade , Taipa , Macau
| | - Shirley W I Siu
- Department of Computer and Information Science , University of Macau , Avenida da Universidade , Taipa , Macau
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11
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NAITO K, IIDA K, TAKADA K. Adsorption Kinetics and Thermodynamics of 2-Aminoethanethiol onto a Polycrystalline Gold Electrode Determined by Cyclic Voltammetry of Reductive Desorption. ELECTROCHEMISTRY 2019. [DOI: 10.5796/electrochemistry.18-00057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Kumi NAITO
- Graduate School of Engineering, Nagoya Institute of Technology
| | - Kanae IIDA
- Graduate School of Engineering, Nagoya Institute of Technology
| | - Kazutake TAKADA
- Graduate School of Engineering, Nagoya Institute of Technology
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12
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Motealleh A, Dorri P, Kehr NS. Self-assembled monolayers of chiral periodic mesoporous organosilica as a stimuli responsive local drug delivery system. J Mater Chem B 2019; 7:2362-2371. [DOI: 10.1039/c8tb02507j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
pH responsive PMOs deliver higher dosages of drugs to malignant cells while delivering less of the drugs to healthy cells.
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Affiliation(s)
- Andisheh Motealleh
- Physikalisches Institut and Center für Soft Nanoscience
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Pooya Dorri
- Physikalisches Institut and Center für Soft Nanoscience
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Nermin Seda Kehr
- Physikalisches Institut and Center für Soft Nanoscience
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
- California NanoSystems Institute (CNSI)
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Design of Therapeutic Self-Assembled Monolayers of Thiolated Abiraterone. NANOMATERIALS 2018; 8:nano8121018. [PMID: 30544493 PMCID: PMC6316423 DOI: 10.3390/nano8121018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/02/2018] [Accepted: 12/05/2018] [Indexed: 12/30/2022]
Abstract
The aim of our work was to synthetize of a new analogue of abiraterone-thiolated abiraterone (HS-AB) and design a gold surface monolayer, bearing in mind recent advances in tuning monolayer structures and using them as efficient drug delivery systems. Therapeutic self-assembled monolayers (TSAMs) were prepared by chemically attaching HS-AB to gold surfaces. Their properties were studied by voltammetry and atomic force microscopy (AFM). A gold electrode with immobilized thioglycolic acid (HS-GA) was used for comparison. The surface concentration of HS-AB on the gold surface was 0.572 nmol/cm², determined from the area of the voltammetric reduction peaks (desorption process). The area per one molecule estimated from the voltammetry experiments was 0.291 nmol/cm². The capacity of thus prepared electrode was also tested. The calculated capacity for the HS-AB modified electrode is 2.90 μF/cm². The obtained value indicates that the monolayer on the gold electrode is quite well ordered and well-packed. AFM images show the formation of gold nanoparticles as a result of immersing the HS-AB modified gold electrode in an aqueous solution containing 1 mM HAuCl₄·3H₂O. These structures arise as a result of the interaction between the HS-AB compound adsorbed on the electrode and the AuCl₄- ions. The voltammetric experiments also confirm the formation of gold structures with specific catalytic properties in the process of oxygen reduction.
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Lai M, Jin Z, Yan M, Zhu J, Yan X, Xu K. The controlled naringin release from TiO2 nanotubes to regulate osteoblast differentiation. J Biomater Appl 2018; 33:673-680. [DOI: 10.1177/0885328218809239] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
To design titanium (Ti)-based biomaterials with controlled drug-releasing bioactive property, TiO2 nanotubes with a diameter of approximately 110 nm was fabricated by electrochemical anodization. TiO2 nanotubes were then loaded with naringin by direct dropping and coated with chitosan layers. The surface morphologies, chemical compositions and wettability of different substrates were characterized by field emission scanning electron microscopy, atomic force microscope, X-ray photoelectron spectroscopy and contact angle measurement, respectively. The in vitro release behavior of naringin was evaluated by UV-visible-spectrophotometer. The biological properties of osteoblasts on different substrates were investigated in vitro. Our results indicate that the chitosan-coated naringin-loaded TiO2 nanotubes enhanced osteoblast spreading, proliferation, alkaline phosphatase activity and late-stage osteoblast mineralization. This study provides a platform to help enhance osteointegration between the bone and implant surface in clinical applications.
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Affiliation(s)
- Min Lai
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Ziyang Jin
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Mengying Yan
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Jing Zhu
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Xufeng Yan
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Kui Xu
- Biomedical Engineering Research Center, Medical School of Ningbo University, Ningbo, Zhejiang, China
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Abstract
Cardiovascular complications are leading causes of most fatalities. Coronary artery disease and surgical failures contribute to the death of the majority of patients. Advanced research in the field of medical devices like stents has efficiently resolved these problems. Clinically, drug-eluting stents have proven their efficacy and safety compared to bare metal stents, which have problems of in-stent restenosis. However, drug-loaded stents coated with polymers have shown adverse effects related to the stability and deterioration of the polymer coating over time. This results in late stent thrombosis and immunogenicity. These reasons laid the foundation for the development of non-polymeric drug-eluting stents. This review focuses on non-polymer drug-eluting stents loaded with different drugs like anti-inflammatory agents, anti-thrombotic, anti-platelet agents, immune suppressants and others. Surface modification techniques on stents like crystalline coating; microporous, macroporous, and nanoporous coatings; and chemically modified self-assembled monolayers are described in detail. There is also an update on clinically approved products and those under development.
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Affiliation(s)
- Nagavendra Kommineni
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India
| | - Raju Saka
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India
| | - Wahid Khan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India.
| | - Abraham J Domb
- School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, 91120, Jerusalem, Israel.
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Park S, Han U, Choi D, Hong J. Layer-by-layer assembled polymeric thin films as prospective drug delivery carriers: design and applications. Biomater Res 2018; 22:29. [PMID: 30275972 PMCID: PMC6158909 DOI: 10.1186/s40824-018-0139-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 09/10/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The main purpose of drug delivery systems is to deliver the drugs at the appropriate concentration to the precise target site. Recently, the application of a thin film in the field of drug delivery has gained increasing interest because of its ability to safely load drugs and to release the drug in a controlled manner, which improves drug efficacy. Drug loading by the thin film can be done in various ways, depending on type of the drug, the area of exposure, and the purpose of drug delivery. MAIN TEXT This review summarizes the various methods used for preparing thin films with drugs via Layer-by-layer (LbL) assembly. Furthermore, additional functionalities of thin films using surface modification in drug delivery are briefly discussed. There are three types of methods for preparing a drug-carrying multilayered film using LbL assembly. First methods include approaches for direct loading of the drug into the pre-fabricated multilayer film. Second methods are preparing thin films using drugs as building blocks. Thirdly, the drugs are incorporated in the cargo so that the cargo itself can be used as the materials of the film. CONCLUSION The appropriate designs of the drug-loaded film were produced in consideration of the release amounts and site of the desired drug. Furthermore, additional surface modification using the LbL technique enabled the preparation of effective drug delivery carriers with improved targeting effect. Therefore, the multilayer thin films fabricated by the LbL technique are a promising candidate for an ideal drug delivery system and the development possibilities of this technology are infinite.
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Affiliation(s)
- Sohyeon Park
- Department of Chemical and Biomolecular Engineering, College of Engineering Yonsei University, 50 Yonsei Ro, Seodaemun Gu, Seoul, 038722 Republic of Korea
| | - Uiyoung Han
- Department of Chemical and Biomolecular Engineering, College of Engineering Yonsei University, 50 Yonsei Ro, Seodaemun Gu, Seoul, 038722 Republic of Korea
| | - Daheui Choi
- Department of Chemical and Biomolecular Engineering, College of Engineering Yonsei University, 50 Yonsei Ro, Seodaemun Gu, Seoul, 038722 Republic of Korea
| | - Jinkee Hong
- Department of Chemical and Biomolecular Engineering, College of Engineering Yonsei University, 50 Yonsei Ro, Seodaemun Gu, Seoul, 038722 Republic of Korea
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Chattaway C, Belbekhouche S, Du Prez FE, Glinel K, Demoustier-Champagne S. Bifunctionalized Redox-Responsive Layers Prepared from a Thiolactone Copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5234-5244. [PMID: 29672069 DOI: 10.1021/acs.langmuir.8b00525] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The development of multifunctional surfaces is of general interest for the fabrication of biomedical, catalytic, microfluidic or biosensing devices. Herein, we report on the preparation of copolymer layers immobilized on gold surface and showing both free thiol and amino groups. These layers are produced by aminolysis of a thiolactone-based copolymer in the presence of a diamine, according to a one-step procedure. The free thiol and amino groups present in the modified copolymer layers can be successfully functionalized with respectively thiolated and carboxylic derivatives, in order to produce bifunctionalized surfaces. In addition, we show that the grafted thiolated derivative can be released by cleavage of the disulfide bond under mild reducing conditions. On the other hand, a side cross-linking reaction occurring during the grafting process and resulting in the formation of copolymer aggregates on the metal surface is evidenced. The methodology developed for the preparation of these bifunctionalized redox-responsive layers should be advantageously used to produce bioactive surfaces with drug loading/release properties.
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Affiliation(s)
- Claire Chattaway
- Institute of Condensed Matter and Nanosciences (Bio and Soft Matter) , Université catholique de Louvain , Croix du Sud 1 , Box L7.04.02, B-1348 Louvain-la-Neuve , Belgium
| | - Sabrina Belbekhouche
- Institute of Condensed Matter and Nanosciences (Bio and Soft Matter) , Université catholique de Louvain , Croix du Sud 1 , Box L7.04.02, B-1348 Louvain-la-Neuve , Belgium
| | - Filip E Du Prez
- Polymer Chemistry Research Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry , Ghent University , Krijgslaan 281 S4 , B-9000 Ghent , Belgium
| | - Karine Glinel
- Institute of Condensed Matter and Nanosciences (Bio and Soft Matter) , Université catholique de Louvain , Croix du Sud 1 , Box L7.04.02, B-1348 Louvain-la-Neuve , Belgium
| | - Sophie Demoustier-Champagne
- Institute of Condensed Matter and Nanosciences (Bio and Soft Matter) , Université catholique de Louvain , Croix du Sud 1 , Box L7.04.02, B-1348 Louvain-la-Neuve , Belgium
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Le Saux G, Edri A, Keydar Y, Hadad U, Porgador A, Schvartzman M. Spatial and Chemical Surface Guidance of NK Cell Cytotoxic Activity. ACS APPLIED MATERIALS & INTERFACES 2018; 10:11486-11494. [PMID: 29557634 DOI: 10.1021/acsami.7b19643] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Studying how different signaling pathways spatially integrate in cells requires selective manipulation and control of different transmembrane ligand-receptor pairs at the same time. This work explores a novel method for precisely arranging two arbitrarily chosen ligands on a micron-scale two-dimensional pattern. The approach is based on lithographic patterning of Au and TiO2 films, followed by their selective functionalization with Ni-nitrilotriacetic acid-histidine and biotin-avidin chemistries, respectively. The selectivity of chemical and biological functionalizations is demonstrated by X-ray photoelectron spectroscopy and immunofluorescence imaging, respectively. This approach is applied to produce the first type of bifunctional surfaces with controllably positioned ligands for activating the receptors of natural killer (NK) immune cells. NK cells were used as a model system to demonstrate the potency of the surface in guiding site-selective cell attachment and activation. Upon applying the suitable ligand or ligand combination, the surfaces guided the appropriate single- or bifunctional attachment and activation. These encouraging results demonstrate the effectiveness of the system as an experimental platform aimed at the comprehensive understanding of the immunological synapse. The great simplicity, modularity, and specificity of this approach make it applicable for a myriad of combinations of other biomolecules and applications, turning it into the "Swiss knife" of biointerfaces.
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Hasan A, Saxena V, Pandey LM. Surface Functionalization of Ti6Al4V via Self-assembled Monolayers for Improved Protein Adsorption and Fibroblast Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3494-3506. [PMID: 29489380 DOI: 10.1021/acs.langmuir.7b03152] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Although metallic biomaterials find numerous biomedical applications, their inherent low bioactivity and poor osteointegration had been a great challenge for decades. Surface modification via silanization can serve as an attractive method for improving the aforementioned properties of such substrates. However, its effect on protein adsorption/conformation and subsequent cell adhesion and spreading has rarely been investigated. This work reports the in-depth study of the effect of Ti6Al4V surface functionalization on protein adsorption and cell behavior. We prepared self-assembled monolayers (SAMs) of five different surfaces (amine, octyl, mixed [1:1 ratio of amine:octyl], hybrid, and COOH). Synthesized surfaces were characterized by Fourier transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy, contact angle goniometry, profilometry, and field emission scanning electron microscopy (FESEM). Quantification of adsorbed mass of bovine serum albumin (BSA) and fibronectin (FN) was determined on different surfaces along with secondary structure analysis. The adsorbed amount of BSA was found to increase with an increase in surface hydrophobicity with the maximum adsorption on the octyl surface while the reverse trend was detected for FN adsorption, having the maximum adsorbed mass on the COOH surface. The α-helix content of adsorbed BSA increased on amine and COOH surfaces while it decreased for other surfaces. Whereas increasing β-turn content of the adsorbed FN with the increase in the surface hydrophobicity was observed. In FN, RGD loops are located in the β-turn and consequently the increase in Δ adhered cells (%) was predominantly increased with the increasing Δ β-turn content (%). We found hybrid surfaces to be the most promising surface modifier due to maximum cell adhesion (%) and proliferation, larger nuclei area, and the least cell circularity. Bacterial density increased with the increasing hydrophobicity and was found maximum for the amine surface (θ = 63 ± 1°) which further decreased with the increasing hydrophobicity. Overall, modified surfaces (in particular hybrid surface) showed better protein adsorption and cell adhesion properties as compared to unmodified Ti6Al4V and can be potentially used for tissue engineering applications.
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Affiliation(s)
- Abshar Hasan
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
| | - Varun Saxena
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
| | - Lalit M Pandey
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
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Kokubun K, Matsumura S, Yudasaka M, Iijima S, Shiba K. Immobilization of a carbon nanomaterial-based localized drug-release system using a bispecific material-binding peptide. Int J Nanomedicine 2018; 13:1643-1652. [PMID: 29588591 PMCID: PMC5862015 DOI: 10.2147/ijn.s155913] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Introduction Inorganic materials are widely used in medical devices, such as artificial hearts, vessels, and joints, in stents, and as nanocarriers for drug-delivery systems. Carbon nanomaterials are of particular interest due to their biological inertness and their capability to accommodate molecules. Several attempts have been proposed, in which carbon nanomaterials are used as nanocarriers for the systemic delivery of drugs. Materials and methods We developed a drug-delivery system in which oxidized single-walled carbon nanohorns (oxSWNHs) were immobilized on a titanium (Ti) surface using material-binding peptides to enable localized drug delivery. For this purpose, we utilized a bispecific peptidic aptamer comprising a core sequence of a Ti-binding peptide and a SWNH-binding peptide to immobilize oxSWNHs on Ti. Results Scanning electron microscopy was used to confirm the presence of oxSWNHs adsorbed onto the Ti surface, and a quartz crystal microbalance was used to evaluate the binding process during oxSWNH adsorption. The oxSWNHs-ornamented Ti substrate was nontoxic to cells and released biologically active dexamethasone over a sustained period. Conclusion This oxSWNHs-immobilized system can be used to modify the surface of Ti in implants and be loaded with drugs that stimulate osteogenesis and bone regeneration.
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Affiliation(s)
- Katsutoshi Kokubun
- Division of Protein Engineering, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan.,Department of Clinical Pathophysiology, Tokyo Dental College, Tokyo, Japan
| | - Sachiko Matsumura
- Division of Protein Engineering, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Masako Yudasaka
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.,Graduate School of Science and Technology, Meijo University, Nagoya, Japan
| | - Sumio Iijima
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.,Graduate School of Science and Technology, Meijo University, Nagoya, Japan
| | - Kiyotaka Shiba
- Division of Protein Engineering, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
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Mohammadiazar S, Roostaie A, Maghsoodi M, Maham M. Chemically Deposited Sol–Gel Film on Porous TiO2 Nanotube Arrays as an Efficient and Unbreakable Solid-Phase Microextraction Fiber. Chromatographia 2018. [DOI: 10.1007/s10337-018-3484-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Self-Assembled Monolayers for Dental Implants. Int J Dent 2018; 2018:4395460. [PMID: 29552036 PMCID: PMC5818935 DOI: 10.1155/2018/4395460] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 10/26/2017] [Indexed: 02/06/2023] Open
Abstract
Implant-based therapy is a mature approach to recover the health conditions of patients affected by edentulism. Thousands of dental implants are placed each year since their introduction in the 80s. However, implantology faces challenges that require more research strategies such as new support therapies for a world population with a continuous increase of life expectancy, to control periodontal status and new bioactive surfaces for implants. The present review is focused on self-assembled monolayers (SAMs) for dental implant materials as a nanoscale-processing approach to modify titanium surfaces. SAMs represent an easy, accurate, and precise approach to modify surface properties. These are stable, well-defined, and well-organized organic structures that allow to control the chemical properties of the interface at the molecular scale. The ability to control the composition and properties of SAMs precisely through synthesis (i.e., the synthetic chemistry of organic compounds with a wide range of functional groups is well established and in general very simple, being commercially available), combined with the simple methods to pattern their functional groups on complex geometry appliances, makes them a good system for fundamental studies regarding the interaction between surfaces, proteins, and cells, as well as to engineering surfaces in order to develop new biomaterials.
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Lee D, Park JP, Koh MY, Kim P, Lee J, Shin M, Lee H. Chitosan-catechol: a writable bioink under serum culture media. Biomater Sci 2018; 6:1040-1047. [DOI: 10.1039/c8bm00174j] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mussel-inspired adhesive polymers exhibiting rapid complexation with serum proteins are used as a direct writable bioink for additive techniques, 3D printing. The mussel-inspired bioinks would be a promising way to design a biocompatible 3D bioink cross-linked without any external stimuli.
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Affiliation(s)
- Daiheon Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
| | - Joseph P. Park
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
| | - Mi-Young Koh
- InnoTherapy Inc. 97 Uisadang-daero
- Seoul 07327
- South Korea
| | - Pureum Kim
- Bio-Mechatronics Team
- Division of Nano-Machinery
- Korea Institute of Machinery and Materials(KIMM)
- Daejeon 34103
- South Korea
| | - Junhee Lee
- Bio-Mechatronics Team
- Division of Nano-Machinery
- Korea Institute of Machinery and Materials(KIMM)
- Daejeon 34103
- South Korea
| | - Mikyung Shin
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
| | - Haeshin Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
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Liu J, Wu Z, He H, Cai K, Zhang H, Xu L. Gallium and silicon synergistically promote osseointegration of dental implant in patients with osteoporosis. Med Hypotheses 2017; 103:35-38. [DOI: 10.1016/j.mehy.2017.02.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 02/28/2017] [Indexed: 01/16/2023]
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Ergün B, De Cola L, Galla HJ, Kehr NS. Surface-Mediated Stimuli Responsive Delivery of Organic Molecules from Porous Carriers to Adhered Cells. Adv Healthc Mater 2016; 5:1588-92. [PMID: 27114067 DOI: 10.1002/adhm.201600098] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/18/2016] [Indexed: 01/09/2023]
Abstract
The alternating layer-by-layer deposition of oppositely charged polyelectrolytes on fluorescence-dye-(Hst)-loaded zeolites L ((Hst) Zeo-PSS/PLL) is described. The arrays and nanocomposite (NC) hydrogels of (Hst) Zeo-PSS/PLL are prepared. The subsequent cell experiments show the potential application of arrays and NC hydrogels of (Hst) Zeo-PSS/PLL as alternative 2D- and 3D-surfaces, respectively, for 2D- and 3D-surface-mediated controlled organic molecules delivery applications.
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Affiliation(s)
- Bahar Ergün
- Department of Chemistry; Biochemistry Division; Hacettepe University; 06800 Ankara Turkey
| | - Luisa De Cola
- Institut de Science et d'Ingénierie Supramoléculaires; 8 allée Gaspard Monge 67083 Strasbourg France
| | - Hans-Joachim Galla
- Institut für Biochemie; Westfälische Wilhelms-Universität Münster; Wilhelm-Klemm-Str.2 D-48149 Münster Germany
| | - Nermin Seda Kehr
- Physikalisches Institut and CeNTech; Westfälische Wilhelms-Universität Münster; Heisenbergstraße 11 D-48149 Münster Germany
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Zohrabi T, Habibi N, Zarrabi A, Fanaei M, Lee LY. Diphenylalanine peptide nanotubes self-assembled on functionalized metal surfaces for potential application in drug-eluting stent. J Biomed Mater Res A 2016; 104:2280-90. [PMID: 27119433 DOI: 10.1002/jbm.a.35764] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/10/2016] [Accepted: 04/25/2016] [Indexed: 11/07/2022]
Abstract
This study focuses on the potential of diphenylalanine self-assembled peptide nanotubes (FF Nts) for delivery of flufenamic acid (FA) from metal implants. Self-assembly of FF Nts was studied in solution and on surfaces of glass, silicone and gold substrates. FA was loaded inside the shell of FF Nts and subsequently FF/FA Nts were attached to gold surfaces. The substrate were characterized by Field Emission Scanning Electron Microscopy (FESEM), fluorescence microscopy, confocal microscopy, and UV-vis spectroscopy. Release of FA from FF Nts were investigated by immersing coated metal substrates in phosphate-buffered saline for 12 days. Self-assembly of FF in water and solvent resulted in formation of nanotubes, which efficiently loaded 98% of FA with concentration of 20 µg/mL. FESEM images confirmed successful attachment of FF/FA Nts to functionalized gold substrates. In vitro release studies indicated using FF Nts has prolonged the release rate of FA for several days. Biocompatibility studied confirmed more than 50% of the cells were alive in concentration of 250-1000 µg/mL of FF Nts thus suggesting the potential of peptide based self-assemble nanostructures as an alternate system for polymer coating in drugs eluting stents. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2280-2290, 2016.
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Affiliation(s)
- Tayebeh Zohrabi
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Iran
| | - Neda Habibi
- Nanotechnology and Advanced Material Institute, Isfahan University of Technology, Iran
| | - Ali Zarrabi
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Iran
| | - Maryam Fanaei
- Department of Biology, Faculty of Science, University of Isfahan, Iran
| | - Lai Yeng Lee
- School of Chemical Engineering and Advanced Materials, Newcastle University, United Kingdom
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Jacques A, Barthélémy B, Delhalle J, Mekhalif Z. 1-Pyrrolyl-10-decylammoniumphosphonate monolayer: a molecular nanolink between electropolymerized pyrrole films and nickel or titanium surfaces. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.04.123] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chen W, Habraken TCJ, Hennink WE, Kok RJ. Polymer-Free Drug-Eluting Stents: An Overview of Coating Strategies and Comparison with Polymer-Coated Drug-Eluting Stents. Bioconjug Chem 2015; 26:1277-88. [PMID: 26041505 DOI: 10.1021/acs.bioconjchem.5b00192] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Clinical evaluations have proven the efficacy of drug-elution stents (DES) in reduction of in-stent restenosis rates as compared to drug-free bare metal stents (BMS). Typically, DES are metal stents that are covered with a polymer film loaded with anti-inflammatory or antiproliferative drugs that are released in a sustained manner. However, although favorable effects of the released drugs have been observed, the polymer coating as such has been associated with several adverse clinical effects, such as late stent thrombosis. Elimination of the polymeric carrier of DES may therefore potentially lead to safer DES. Several technologies have been developed to design polymer-free DES, such as the use of microporous stents and inorganic coatings that can be drug loaded. Several drugs, including sirolimus, tacrolimus, paclitaxel, and probucol have been used in the design of carrier-free stents. Due to the function of the polymeric coating to control the release kinetics of a drug, polymer-free stents are expected to have a faster drug elution rate, which may affect the therapeutic efficacy. However, several polymer-free stents have shown similar efficacy and safety as the first-generation DES, although the superiority of polymer-free DES has not been established in clinical trials.
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Affiliation(s)
- Weiluan Chen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Tom C J Habraken
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Robbert J Kok
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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Jang H, Kim DE, Min DH. Self-assembled Monolayer Mediated Surface Environment Modification of Poly(vinylpyrrolidone)-Coated Hollow Au-Ag Nanoshells for Enhanced Loading of Hydrophobic Drug and Efficient Multimodal Therapy. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12789-12796. [PMID: 25996449 DOI: 10.1021/acsami.5b01903] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Hollow Au-Ag bimetallic nanoshell possessing hydrophobic interior space and hydrophilic exterior surface was prepared and its application as a chemo-thermo-gene therapeutic agent based on its high payload of multiple drugs having different water solubility was demonstrated. The multifunctional drug delivery system is based on the hydrophobic interior created by the self-assembled monolayer (SAM) of hexanethiol onto the inner surface of the hollow metallic nanoshells whereas the outer surface was mostly coated by hydrophilic biocompatible polymer. The nanoshells having surface environment modified by hexanethiol SAMs provided high capacity both for hydrophilic DNAzyme (Dz) to induce gene silencing and for hydrophobic SN38 (7-ethyl-10-hydroxycamptothecin), anticancer drug. The release of the loaded Dz and SN38 was independently triggered by an acidic environment and by photothermal temperature elevation upon irradiation, respectively. The chemo-thermo-gene multitherapy based on the present nanoshells having modified surface environment showed high efficacy in quantitative cell-based assays using Huh7 human liver cell containing hepatitis C viral NS3 gene replicon RNA.
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Affiliation(s)
- Hongje Jang
- †Department of Chemistry, Center for RNA Research, Institute for Basic Sciences (IBS), Seoul National University, Seoul 151-747, Republic of Korea
| | - Dong-Eun Kim
- ‡Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Republic of Korea
| | - Dal-Hee Min
- †Department of Chemistry, Center for RNA Research, Institute for Basic Sciences (IBS), Seoul National University, Seoul 151-747, Republic of Korea
- §Lemonex Inc., Seoul 151-742, Republic of Korea
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Dendritic Peptide Nanostructures Formed from Self-Assembly of Di-l-phenylalanine Extracted from Alzheimer’s β-Amyloid Poly Peptides: Insights into Their Assembly Process. Int J Pept Res Ther 2015. [DOI: 10.1007/s10989-015-9468-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Vaithilingam J, Kilsby S, Goodridge RD, Christie SDR, Edmondson S, Hague RJM. Functionalisation of Ti6Al4V components fabricated using selective laser melting with a bioactive compound. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 46:52-61. [PMID: 25491959 DOI: 10.1016/j.msec.2014.10.015] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 08/12/2014] [Accepted: 10/02/2014] [Indexed: 11/30/2022]
Abstract
Surface modification of an implant with a biomolecule is used to improve its biocompatibility and to reduce post-implant complications. In this study, a novel approach has been used to functionalise phosphonic acid monolayers with a drug. Ti6Al4V components fabricated using selective laser melting (SLM) were functionalised with Paracetamol (a pharmaceutically relevant biomolecule) using phosphonic acid based self-assembled monolayers (SAMs). The attachment, stability of the monolayers on the SLM fabricated surface and functionalisation of SAMs with Paracetamol were studied using X-ray photoelectron spectroscopy (XPS) and surface wettability measurements. The obtained results confirmed that SAMs were stable on the Ti6Al4V surface for over four weeks and then began to desorb from the surface. The reaction used to functionalise the phosphonic acid monolayers with Paracetamol was noted to be successful. Thus, the proposed method has the potential to immobilise drugs/proteins to SAM coated surfaces and improve their biocompatibility and reduce post-implant complications.
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Affiliation(s)
- Jayasheelan Vaithilingam
- Additive Manufacturing and 3D Printing Research Group, School of Engineering, The University of Nottingham, Nottingham NG7 2RD, UK
| | - Samuel Kilsby
- Department of Chemistry, Loughborough University, Loughborough LE11 3TU, UK
| | - Ruth D Goodridge
- Additive Manufacturing and 3D Printing Research Group, School of Engineering, The University of Nottingham, Nottingham NG7 2RD, UK.
| | | | - Steve Edmondson
- School of Materials, The University of Manchester, Manchester M13 9PL, UK
| | - Richard J M Hague
- Additive Manufacturing and 3D Printing Research Group, School of Engineering, The University of Nottingham, Nottingham NG7 2RD, UK
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Calcium and zinc containing bactericidal glass coatings for biomedical metallic substrates. Int J Mol Sci 2014; 15:13030-44. [PMID: 25056542 PMCID: PMC4139889 DOI: 10.3390/ijms150713030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/30/2014] [Accepted: 07/01/2014] [Indexed: 01/16/2023] Open
Abstract
The present work presents new bactericidal coatings, based on two families of non-toxic, antimicrobial glasses belonging to B2O3–SiO2–Na2O–ZnO and SiO2–Na2O–Al2O3–CaO–B2O3 systems. Free of cracking, single layer direct coatings on different biomedical metallic substrates (titanium alloy, Nb, Ta, and stainless steel) have been developed. Thermal expansion mismatch was adjusted by changing glass composition of the glass type, as well as the firing atmosphere (air or Ar) according to the biomedical metallic substrates. Formation of bubbles in some of the glassy coatings has been rationalized considering the reactions that take place at the different metal/coating interfaces. All the obtained coatings were proven to be strongly antibacterial versusEscherichia coli (>4 log).
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Thiruppathi E, Mani G. Vitamin-C delivery from CoCr alloy surfaces using polymer-free and polymer-based platforms for cardiovascular stent applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6237-6249. [PMID: 24832897 DOI: 10.1021/la501448h] [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
Antiproliferative drugs such as paclitaxel and sirolimus are delivered from stents to inhibit the growth of smooth muscle cells (SMCs) for preventing neointimal hyperplasia. However, these drugs delay the growth of endothelial cells (ECs) as well and cause late stent thrombosis. We recently demonstrated the use of Vitamin-C (l-ascorbic acid, l-AA) over paclitaxel and sirolimus for inhibiting SMCs growth and promoting EC growth simultaneously. In this study, we have investigated the delivery of l-AA from CoCr alloy surfaces for potential use in stents. A polymer-free phosphoric acid (PA) platform and a polymer-based poly(lactic-co-glycolic acid) (PLGA) platform were used for coating l-AA onto CoCr surfaces. For the PA platform, FTIR confirmed that the PA was coated on CoCr, while the AFM showed that the PA coating on the CoCr surface was homogeneous. The successful deposition of l-AA on PA-coated CoCr was also confirmed by FTIR. The uniform distribution of l-AA crystals on PA-coated CoCr was shown by SEM, optical profilometer, and AFM. The drug release studies showed that l-AA (276 μg/cm(2)) was burst released from the PA platform by 1 h. For the PLGA platform, SEM showed that the l-AA incorporated polymer films were smoothly and uniformly coated on CoCr. FTIR showed that l-AA was incorporated into the bulk of the PLGA film. DSC showed that the l-AA was present in an amorphous form and formed an intermolecular bonding interaction with PLGA. The drug release studies showed that l-AA was sustained released from the PLGA coated CoCr for up to 24 h. The SEM, FTIR, and DSC characterizations of samples collected post drug release shed light on the mechanism of l-AA release from PLGA coated CoCr. Thus, this study demonstrated the delivery of l-AA from biomaterial surfaces for potential applications in stents and other implantable medical devices.
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Affiliation(s)
- Eagappanath Thiruppathi
- Biomedical Engineering Program, The University of South Dakota , 4800 North Career Avenue, Sioux Falls, South Dakota 57107, United States
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A Polymer-Free Paclitaxel Eluting Coronary Stent: Effects of Solvents, Drug Concentrations and Coating Methods. Ann Biomed Eng 2014; 42:1170-84. [DOI: 10.1007/s10439-014-1003-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 03/28/2014] [Indexed: 10/25/2022]
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Lyndon JA, Boyd BJ, Birbilis N. Metallic implant drug/device combinations for controlled drug release in orthopaedic applications. J Control Release 2014; 179:63-75. [PMID: 24512924 DOI: 10.1016/j.jconrel.2014.01.026] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/25/2014] [Accepted: 01/27/2014] [Indexed: 10/25/2022]
Abstract
The study of metallic drug/device combinations for controlled drug release in orthopaedic applications has gained significant momentum in the past decade, particularly for the prevention and reduction of implant associated infection. Such combinations are commonly based upon a permanent metallic implant (such as stainless steel or titanium) and are then coated with a drug-eluting polymer or ceramic system. Drug elution is also possible from the implant itself by utilising metallic foams, porous architectures and bioresorbable metals. This review will explore the current research into metallic implant drug/device combinations via a critical review of the relevant literature.
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Affiliation(s)
- Jessica A Lyndon
- Department of Materials Engineering, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Ben J Boyd
- Drug Delivery, Disposition and Dynamics, Monash institute of Pharmaceutical Sciences, Monash University Parkville Campus, 381 Royal Pde, Parkville, Victoria 3052, Australia
| | - Nick Birbilis
- Department of Materials Engineering, Monash University, Wellington Road, Clayton, Victoria 3800, Australia.
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Mirmohseni A, Hosseini J, Shojaei M, Davaran S. Interactions of anti-proliferative and anti-platelet drugs with self-assembled monolayers: a future strategy in stent development. RSC Adv 2014. [DOI: 10.1039/c3ra46157b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Design and evaluation of mixed self-assembled monolayers for a potential use in everolimus eluting coronary stents. Colloids Surf B Biointerfaces 2013; 112:330-6. [DOI: 10.1016/j.colsurfb.2013.07.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 07/20/2013] [Accepted: 07/30/2013] [Indexed: 02/02/2023]
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Lamichhane S, Lancaster S, Thiruppathi E, Mani G. Interaction of endothelial and smooth muscle cells with cobalt-chromium alloy surfaces coated with paclitaxel deposited self-assembled monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14254-14264. [PMID: 24156365 DOI: 10.1021/la403533r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The use of self-assembled monolayers (SAMs) as a polymer-free platform to deliver an antiproliferative drug, paclitaxel (PAT), from a stent material cobalt-chromium (CoCr) alloy has been previously demonstrated. In this study, the interaction of human aortic endothelial cells (ECs) and human aortic smooth muscle cells (SMCs) with CoCr alloy surfaces coated with SAMs- (SAMs-CoCr) and PAT-deposited SAMs (PAT-SAMs-CoCr) was investigated. A polished CoCr with no coatings was used as a control. The viability, proliferation, morphology, and phenotype of ECs and SMCs were investigated on these samples. SAMs-CoCr significantly enhanced the growth of ECs. Also, the ECs were well spreading with its typical morphological features and showed stronger PECAM-1 expression on SAMs-CoCr. This showed that the SAMs-CoCr surface is conducive to endothelialization. For PAT-SAMs-CoCr, although the adhesion of ECs was lower, the cells continued to proliferate with some degree of spreading and limited PECAM-1 expression. For SMCs, a significant decrease in the cell proliferation was observed on SAMs-CoCr when compared with that of Control-CoCr. PAT-SAMs-CoCr showed maximum inhibitory effect on the proliferation of SMCs. Also, the SMCs on PAT-SAMs-CoCr displayed a poorly spread discoid morphology with disarranged α-actin filaments. This showed that the PAT released from the SAMs platform successfully inhibited the growth of SMCs. Thus, this study showed the interaction of ECs and SMCs with SAMs-CoCr and PAT-SAMs-CoCr for potential uses in stents and other cardiovascular medical devices.
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Affiliation(s)
- Sujan Lamichhane
- Biomedical Engineering Program, The University of South Dakota , 4800 North Career Avenue, Sioux Falls, South Dakota 57107, United States
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Stent-based drug-delivery systems: current challenges and future trends. Ther Deliv 2013; 4:1079-82. [PMID: 24024507 DOI: 10.4155/tde.13.63] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Tsud N, Acres RG, Iakhnenko M, Mazur D, Prince KC, Matolín V. Bonding of Histidine to Cerium Oxide. J Phys Chem B 2013; 117:9182-93. [DOI: 10.1021/jp404385h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Nataliya Tsud
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma
Science, V Holešovičkách 2, Prague, 18000, Czech
Republic
| | - Robert G. Acres
- Elettra-Sincrotrone Trieste S.C.p.A., in Area Science Park, Strada Statale
14, km 163.5, Basovizza (Trieste), 34149, Italy
| | - Marianna Iakhnenko
- Taras Shevchenko National University of Kyiv, Faculty of Physics, Department
of Experimental Physics, 64, Volodymyrs’ka St., 01601 Kyiv,
Ukraine
| | - Daniel Mazur
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma
Science, V Holešovičkách 2, Prague, 18000, Czech
Republic
| | - Kevin C. Prince
- Elettra-Sincrotrone Trieste S.C.p.A., in Area Science Park, Strada Statale
14, km 163.5, Basovizza (Trieste), 34149, Italy
- CNR-IOM Laboratorio TASC, Basovizza (Trieste), 34149, Italy
| | - Vladimír Matolín
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma
Science, V Holešovičkách 2, Prague, 18000, Czech
Republic
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41
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Local control of protein binding and cell adhesion by patterned organic thin films. Anal Bioanal Chem 2013; 405:3673-91. [DOI: 10.1007/s00216-013-6748-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 01/08/2013] [Accepted: 01/14/2013] [Indexed: 12/18/2022]
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Holt SA, Le Brun AP, Nelson ARJ, Lakey JH. In situ study of the impact of acidic and neutral deposition pH on alkane phosphate film formation and stability on TiO2. RSC Adv 2013. [DOI: 10.1039/c2ra22643j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Milošev I, Metikoš-Huković M, Petrović Ž. Influence of preparation methods on the properties of self-assembled films of octadecylphosphonate on Nitinol: XPS and EIS studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.08.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ajami E, Aguey-Zinsou KF. Functionalization of electropolished titanium surfaces with silane-based self-assembled monolayers and their application in drug delivery. J Colloid Interface Sci 2012; 385:258-67. [DOI: 10.1016/j.jcis.2012.07.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 07/03/2012] [Accepted: 07/03/2012] [Indexed: 11/16/2022]
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Shi X, Wu H, Li Y, Wei X, Du Y. Electrical signals guided entrapment and controlled release of antibiotics on titanium surface. J Biomed Mater Res A 2012; 101:1373-8. [PMID: 23077102 DOI: 10.1002/jbm.a.34432] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 07/28/2012] [Accepted: 08/29/2012] [Indexed: 11/10/2022]
Abstract
Electrical signals are used to trigger the entrapment and release of antibiotics on the surface of titanium plate. The entrapment of antibiotics relies on the electrochemically induced pH gradient generated at the titanium surface that allows the gelation of an aminopolysaccharide chitosan and codeposition of vancomycin, a common antibiotic, within chitosan gel. The release of vancomycin is controlled by an anodic signal imposed to the titanium plate that causes a pH decrease and erosion of chitosan gel. We show that the on demand entrapment and release of vancomycin at the surface of titanium plate is fundamentally altered and controlled by voltage. We expect that this rapid, mild and facile electrochemical process for antibiotics loading and release will find applications in controlled drug release from titanium implants.
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Affiliation(s)
- Xiaowen Shi
- Department of Environmental Science, School of Resource and Environmental Science, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China.
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Kasputis T, Pannier AK. The role of surface chemistry-induced cell characteristics on nonviral gene delivery to mouse fibroblasts. J Biol Eng 2012; 6:17. [PMID: 22967455 PMCID: PMC3517526 DOI: 10.1186/1754-1611-6-17] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 09/06/2012] [Indexed: 01/05/2023] Open
Abstract
Background Gene delivery approaches serve as a platform to modify gene expression of a cell population with applications including functional genomics, tissue engineering, and gene therapy. The delivery of exogenous genetic material via nonviral vectors has proven to be less toxic and to cause less of an immune response in comparison to viral vectors, but with decreased efficiency of gene transfer. Attempts have been made to improve nonviral gene transfer efficiency by modifying physicochemical properties of gene delivery vectors as well as developing new delivery techniques. In order to further improve and understand nonviral gene delivery, our approach focuses on the cell-material interface, since materials are known to modulate cell behavior, potentially rendering cells more responsive to nonviral gene transfer. In this study, self-assembled monolayers of alkanethiols on gold were employed as model biomaterial interfaces with varying surface chemistries. NIH/3T3 mouse fibroblasts were seeded on the modified surfaces and transfected using either lipid- or polymer- based complexing agents. Results Transfection was increased in cells on charged hydrophilic surfaces presenting carboxylic acid terminal functional groups, while cells on uncharged hydrophobic surfaces presenting methyl terminations demonstrated reduced transfection for both complexing agents. Surface–induced cellular characteristics that were hypothesized to affect nonviral gene transfer were subsequently investigated. Cells on charged hydrophilic surfaces presented higher cell densities, more cell spreading, more cells with ellipsoid morphologies, and increased quantities of focal adhesions and cytoskeleton features within cells, in contrast to cell on uncharged hydrophobic surfaces, and these cell behaviors were subsequently correlated to transfection characteristics. Conclusions Extracellular influences on nonviral gene delivery were investigated by evaluating the upregulation and downregulation of transgene expression as a function of the cell behaviors induced by changes in the cells’ microenvronments. This study demonstrates that simple surface modifications can lead to changes in the efficiency of nonviral gene delivery. In addition, statistically significant differences in various surface-induced cell characteristics were statistically correlated to transfection trends in fibroblasts using both lipid and polymer mediated DNA delivery approaches. The correlations between the evaluated complexing agents and cell behaviors (cell density, spreading, shape, cytoskeleton, focal adhesions, and viability) suggest that polymer-mediated transfection is correlated to cell morphological traits while lipid-mediated transfection correlates to proliferative characteristics.
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Affiliation(s)
- Tadas Kasputis
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, 231 LW Chase Hall, Lincoln, NE, 68583-0726, USA.
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Nazneen F, Herzog G, Arrigan DW, Caplice N, Benvenuto P, Galvin P, Thompson M. Surface chemical and physical modification in stent technology for the treatment of coronary artery disease. J Biomed Mater Res B Appl Biomater 2012; 100:1989-2014. [DOI: 10.1002/jbm.b.32772] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 06/20/2012] [Indexed: 12/12/2022]
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Abstract
The formation of methyl-terminated carboxylic acid self-assembled monolayers (SAMs) with even numbers of carbons, from eighteen to thirty, was investigated on the oxide surface of Ti-6Al-4V and component metal oxides. Modified surfaces were characterized using diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) and contact angle analysis. Infrared spectroscopy indicated that using aerosol spray deposition techniques, stable, all-trans SAMs of octacosanoic (28 carbons) and triacontanoic (30 carbons) acids were formed on the alloy. Films were similarly formed on titanium and aluminum oxide. The surface of vanadium oxide exhibited limited reactivity. MALDI-TOF MS confirmed that formed films were monolayers, without multilayers or aggregates present. Water contact angles are indicative of the presence of hydrophobic methyl groups at the interface. This stable carboxylic acid SAM formation could be a useful alternative to phosphonic acid SAMs for corrosion and other applications.
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Hussain S, Smulders S, De Vooght V, Ectors B, Boland S, Marano F, Van Landuyt KL, Nemery B, Hoet PHM, Vanoirbeek JAJ. Nano-titanium dioxide modulates the dermal sensitization potency of DNCB. Part Fibre Toxicol 2012; 9:15. [PMID: 22621278 PMCID: PMC3583227 DOI: 10.1186/1743-8977-9-15] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 05/02/2012] [Indexed: 11/10/2022] Open
Abstract
We determined the ability of a model nanoparticle (NP) (titanium dioxide, TiO(2)) to modulate sensitization induced by a known potent dermal sensitizer (dinitrochlorobenzene) using a variant of the local lymph node assay called lymph node proliferation assay.BALB/c mice received sub-cutaneous injections of vehicle (2.5 mM sodium citrate), TiO(2) NPs (0.004, 0.04 or 0.4 mg/ml) or pigment particles (0.04 mg/ml) both stabilized in sodium citrate buffer at the base of each ear (2x50μl), before receiving dermal applications (on both ears) of 2,4-Dinitrochlorobenzene (DNCB) (2x25μl of 0.1%) or its vehicle (acetone olive oil - AOO (4:1)) on days 0, 1 and 2. On day 5, the stimulation index (SI) was calculated as a ratio of (3)HTdR incorporation in lymphocytes from DNBC-treated mice and AOO-treated controls. In a second experiment the EC(3)-value for DNCB (0 to 0.1%) was assessed in the absence or presence of 0.04 mg/ml TiO(2). In a third experiment, the lymphocyte subpopulations and the cytokine secretion profile were analyzed after TiO(2) (0.04 mg/ml) and DNCB (0.1%) treatment. Injection of NPs in AOO-treated control mice did not have any effect on lymph node (LN) proliferation. DNCB sensitization resulted in LN proliferation, which was further increased by injection of TiO(2) NPs before DNCB sensitization. The EC(3) of DNCB, with prior injection of vehicle control was 0.041%, while injection with TiO(2) decreased the EC(3) of DNCB to 0.015%. TiO(2) NPs pre-treatment did not alter the lymphocyte subpopulations, but significantly increased the level of IL-4 and decreased IL-10 production in DNCB treated animals.In conclusion, our study demonstrates that administration of nano-TiO(2) increases the dermal sensitization potency of DNCB, by augmenting a Th(2) response, showing the immunomodulatory abilities of NPs.
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Affiliation(s)
- Salik Hussain
- Unit of Functional and Adaptive Biology CNRS EAC 4413, Laboratory of Molecular and Cellular Responses to Xenobiotics, Univ Paris Diderot, Sorbonne Paris Cité, France
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Hirata I, Yoshida Y, Nagaoka N, Hiasa K, Abe Y, Maekawa K, Kuboki T, Akagawa Y, Suzuki K, Meerbeek BV, Messersmith PB, Okazaki M. Real time assessment of surface interactions with a titanium passivation layer by surface plasmon resonance. Acta Biomater 2012; 8:1260-6. [PMID: 22154862 DOI: 10.1016/j.actbio.2011.11.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Revised: 11/14/2011] [Accepted: 11/21/2011] [Indexed: 10/14/2022]
Abstract
Due to the high corrosion resistance and strength to density ratio titanium is widely used in industry, and also in a gamut of medical applications. Here we report for the first time on our development of a titanium passivation layer sensor that makes use of surface plasmon resonance (SPR). The deposited titanium metal layer on the sensor was passivated in air, similarly to titanium medical devices. Our "Ti-SPR sensor" enables analysis of biomolecule interactions with the passivated surface of titanium in real time. As a proof of concept, corrosion of a titanium passivation layer exposed to acid was monitored in real time. The Ti-SPR sensor can also accurately measure the time-dependence of protein adsorption onto the titanium passivation layer at sub-nanogram per square millimeter accuracy. Besides such SPR analyses, SPR imaging (SPRI) enables real time assessment of chemical surface processes that occur simultaneously at "multiple independent spots" on the Ti-SPR sensor, such as acid corrosion or adhesion of cells. Our Ti-SPR sensor will therefore be very useful to study titanium corrosion phenomena and biomolecular titanium-surface interactions with application in a broad range of industrial and biomedical fields.
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