1
|
Marsotto M, De Santis S, Sotgiu G, Battocchio C, Iucci G, Ceccucci A, Masci G, Orsini M. Multifunctional Platform for Covalent Titanium Coatings: Micro-FTIR, XPS, and NEXAFS Characterizations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6837-6845. [PMID: 37130382 DOI: 10.1021/acs.langmuir.3c00424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
This work aims at preparing and characterizing a versatile multifunctional platform enabling the immobilization of macromolecules on a titanium surface by robust covalent grafting. Functionalized titanium is widely used in the biomedical field to improve its properties. Despite its high biocompatibility and osteointegrability, titanium implants are not very stable in the long term due to the onset of inflammation and bacterial infections. The proposed method allows the superficial insertion of three different organic linkers to be used as anchors for the attachment of biopolymers or bioactive molecules. This strategy used green solvents and is a good alternative to the proposed classic methods that employ organic solvents. The uniformly modified surfaces were characterized by micro-Fourier transform infrared spectroscopy (micro-FTIR), X-ray Photoelectron spectroscopy (XPS) and Near-Edge X-ray Absorption Fine Structure (NEXAFS). The latter made it possible to assess the orientation of the linker molecules with respect to the titanium surface. To test the efficiency of the linkers, two polymers (alginate and 2-(dimethylamino)-ethyl methacrylate (PDMAEMA)), with the potential ability to increase biocompatibility, were covalently attached to the titanium surfaces. The obtained results are a good starting point for the realization of stable polymeric coatings permanently bonded to the surface that could be used to extend the life of biomedical implants.
Collapse
Affiliation(s)
- Martina Marsotto
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Serena De Santis
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| | - Giovanni Sotgiu
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| | - Chiara Battocchio
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Giovanna Iucci
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Anita Ceccucci
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| | - Giancarlo Masci
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Roma, Italy
| | - Monica Orsini
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| |
Collapse
|
2
|
Synthesis of hyperbranched polyamine dendrimer/chitosan/silica composite for efficient adsorption of Hg(II). Int J Biol Macromol 2023; 230:123135. [PMID: 36610565 DOI: 10.1016/j.ijbiomac.2023.123135] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/16/2022] [Accepted: 01/01/2023] [Indexed: 01/06/2023]
Abstract
The pollution of water system with Hg(II) exerts hazardous effect to ecosystem and public health. Adsorption is considered to be a promising strategy to remove Hg(II) from aqueous solution. Herein, hyperbranched polyamine dendrimer/chitosan/silica composite (SiO2-FP) was synthesized for the adsorption of aqueous Hg(II). The adsorption performance of SiO2-FP was comprehensively determined by considering various influencing factors. SiO2-FP displays good adsorption performance for Hg(II) with the adsorption capacity of 0.79 mmol·g-1, which is higher than the corresponding chitosan functionalized silica (SiO2-CTS) by 46.30 %. The optimal solution pH for the adsorption of Hg(II) is 6. Adsorption kinetic indicates the adsorption for Hg(II) can reach equilibrium at 250 min. Adsorption kinetic process can be well fitted by pseudo-second-order (PSO). Adsorption isotherm reveals the adsorption for Hg(II) can be promoted by increasing initial Hg(II) concentration and adsorption temperature. The adsorption isotherm indicates the adsorption process can be described by Langmuir model and the adsorption is a spontaneous, endothermic and entropy-increased process. SiO2-FP displays excellent adsorption selectivity and can 100 % adsorb Hg(II) with the coexisting of Ni(II), Zn(II), Pb(II), Mn(II), and Co(II). Adsorption mechanism demonstrates -NH-, -NH2, CN, CONH, -OH, and CO participated in the adsorption. SiO2-FP exhibits good regeneration property and the regeneration rate can maintain approximately 90 % after five adsorption-desorption cycles.
Collapse
|
3
|
Zhu X, Ma N, Wan Y, Wang L, Zhang Y, Yan C, Qian W. Evaluation of covalent coupling strategies for immobilizing ligands on silica colloidal crystal films by optical interferometry. Analyst 2023; 148:1024-1031. [PMID: 36723219 DOI: 10.1039/d2an02079c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Immobilizing ligands is a crucial part of preparing optical sensors and directly connected to the sensitivity, stability, and other characteristics of sensors. In this work, an ordered porous layer interferometry (OPLI) system that can monitor the covalent coupling process of ligands in real time was developed. Films of silica colloidal crystal (SCC), as optical interference substrates, were surface modified by three different reagents: chloroacetic acid, glutaric anhydride, and carboxymethyl dextran. Staphylococcus aureus protein A (SPA), the ligand, was immobilized on SCC films. The covalent coupling process of SPA and SCC films can be dynamically monitored by the OPLI system. In addition, the three different strategies were evaluated by comparing the efficiency of the sensors prepared by different methods for binding Immunoglobulin G (IgG). The glutaric anhydride-modified sensor offers apparent advantages in terms of bound IgG quantity and affinity. This system provides a simple and intuitive way to determine the efficiency of different covalent coupling strategies. Furthermore, the sensor covalently coupled with SPA also excels in the determination of IgG content in complex systems such as milk. At the same time, the covalent coupling gives the sensor the ability to be stored stably over time.
Collapse
Affiliation(s)
- Xueyi Zhu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Ning Ma
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Yizhen Wan
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Lu Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Yu Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Chengyu Yan
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Weiping Qian
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| |
Collapse
|
4
|
Evaluation of the in vitro and in situ antimicrobial properties of chitosan-functionalised silica materials. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
5
|
Petrucci E, Porcelli F, Orsini M, De Santis S, Sotgiu G. Effect of Precursors on the Electrochemical Properties of Mixed RuOx/MnOx Electrodes Prepared by Thermal Decomposition. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7489. [PMID: 36363080 PMCID: PMC9655995 DOI: 10.3390/ma15217489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Growing thin layers of mixed-metal oxides on titanium supports allows for the preparation of versatile electrodes that can be used in many applications. In this work, electrodes coated with thin films of ruthenium (RuOx) and manganese oxide (MnOx) were fabricated via thermal decomposition of a precursor solution deposited on a titanium substrate by spin coating. In particular, we combined different Ru and Mn precursors, either organic or inorganic, and investigated their influence on the morphology and electrochemical properties of the materials. The tested salts were: Ruthenium(III) acetylacetonate (Ru(acac)3), Ruthenium(III) chloride (RuCl3·xH2O), Manganese(II) nitrate (Mn(NO3)2·4H2O), and Manganese(III) acetylacetonate (Mn(acac)3). After fabrication, the films were subjected to different characterization techniques, including scanning electron microscopy (SEM), polarization analysis, open-circuit potential (OCP) measurements, electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), cyclic voltammetry (CV), and galvanostatic charge-discharge (GCD) experiments. The results indicate that compared to the others, the combination of RuCl3 and Mn(acac) produces fewer compact films, which are more susceptible to corrosion, but have outstanding capacitive properties. In particular, this sample exhibits a capacitance of 8.3 mF cm-2 and a coulombic efficiency of higher than 90% in the entire range of investigated current densities.
Collapse
Affiliation(s)
- Elisabetta Petrucci
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Francesco Porcelli
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| | - Monica Orsini
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| | - Serena De Santis
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| | - Giovanni Sotgiu
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy
| |
Collapse
|
6
|
Mixed Oxide Electrodes Based on Ruthenium and Copper: Electrochemical Properties as a Function of the Composition and Method of Manufacture. METALS 2022. [DOI: 10.3390/met12020316] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The development of mixed oxide electrodes is being intensively investigated to reduce the high cost associated with the use of noble metals and to obtain versatile and long-lasting devices. To evaluate their use for charge storage or anodic oxidation, in this paper, thin-film electrodes coated with ruthenium (RuOx) and copper oxide (CuOx) are fabricated by thermal decomposition of organic solutions containing the precursors by drop-casting on titanium (Ti) foils. The coating consisted of four layers of metal oxide. To investigate the effect of copper (Cu) on electrochemical performances, different approaches are adopted by varying the ratios of precursors’ concentration and including a RuOx interlayer. A comparison with samples obtained by only RuOx has been also performed. The electrodes are characterized using scanning electron microscopy (SEM), cyclic (CV) and linear sweep (LSV) voltammetry, electrochemical impedance spectroscopy (EIS), and corrosion tests. The addition of Cu enhances the capacitive response of the materials and promotes electron transfer reversibility. The coatings obtained by the highest Ru:Cu ratio (95:5) exhibit a more uniform surface distribution and increased corrosion resistance. The interlayer is beneficial to further reduce the corrosion susceptibility and to promote the oxygen evolution but detrimental in the charge storage power. The results suggest the possibility to enhance the electrochemical performance of expensive RuOx through a combination with a low amount of cheaper and more abundant CuOx.
Collapse
|
7
|
De Santis S, Rossi E, Sebastiani M, Sennato S, Bemporad E, Orsini M. A Nanoindentation Approach for Time-Dependent Evaluation of Surface Free Energy in Micro- and Nano-Structured Titanium. MATERIALS 2021; 15:ma15010287. [PMID: 35009432 PMCID: PMC8746133 DOI: 10.3390/ma15010287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/24/2021] [Accepted: 12/24/2021] [Indexed: 02/07/2023]
Abstract
Surface free energy (SFE) of titanium surfaces plays a significant role in tissue engineering, as it affects the effectiveness and long-term stability of both active coatings and functionalization and the establishment of strong bonds to the newly growing bone. A new contact–mechanics methodology based on high-resolution non-destructive elastic contacting nanoindentation is applied here to study SFE of micro- and nano-structured titanium surfaces, right after their preparation and as a function of exposure to air. The effectiveness of different surface treatments in enhancing SFE is assessed. A time-dependent decay of SFE within a few hours is observed, with kinetics related to the sample preparation. The fast, non-destructive method adopted allowed for SFE measurements in very hydrophilic conditions, establishing a reliable comparison between surfaces with different properties.
Collapse
Affiliation(s)
- Serena De Santis
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy;
- Correspondence:
| | - Edoardo Rossi
- Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy; (E.R.); (M.S.); (E.B.)
| | - Marco Sebastiani
- Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy; (E.R.); (M.S.); (E.B.)
| | - Simona Sennato
- CNR-ISC Sede Sapienza, Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Edoardo Bemporad
- Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy; (E.R.); (M.S.); (E.B.)
| | - Monica Orsini
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy;
| |
Collapse
|
8
|
Belfiore NP, Bagolini A, Rossi A, Bocchetta G, Vurchio F, Crescenzi R, Scorza A, Bellutti P, Sciuto SA. Design, Fabrication, Testing and Simulation of a Rotary Double Comb Drives Actuated Microgripper. MICROMACHINES 2021; 12:mi12101263. [PMID: 34683314 PMCID: PMC8538711 DOI: 10.3390/mi12101263] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/10/2021] [Accepted: 10/15/2021] [Indexed: 12/27/2022]
Abstract
This paper presents the development of a new microgripper actuated by means of rotary-comb drives equipped with two cooperating fingers arrays. The microsystem presents eight CSFH flexures (Conjugate Surface Flexure Hinge) that allow the designer to assign a prescribed motion to the gripping tips. In fact, the adoption of multiple CSFHs gives rise to the possibility of embedding quite a complex mechanical structure and, therefore, increasing the number of design parameters. For the case under study, a double four-bar linkage in a mirroring configuration was adopted. The presented microgripper has been fabricated by using a hard metal mask on a Silicon-on-Insulator (SOI) wafer, subject to DRIE (Deep Reactive Ion Etching) process, with a vapor releasing final stage. Some prototypes have been obtained and then tested in a lab. Finally, the experimental results have been used in order to assess simulation tools that can be used to minimize the amount of expensive equipment in operational environments.
Collapse
Affiliation(s)
- Nicola Pio Belfiore
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, Italy; (A.R.); (G.B.); (F.V.); (A.S.); (S.A.S.)
- Correspondence: ; Tel.: +39-06-5733-3316
| | - Alvise Bagolini
- Micro Nano Facility, Fondazione Bruno Kessler, 38123 Trento, Italy; (A.B.); (P.B.)
| | - Andrea Rossi
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, Italy; (A.R.); (G.B.); (F.V.); (A.S.); (S.A.S.)
| | - Gabriele Bocchetta
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, Italy; (A.R.); (G.B.); (F.V.); (A.S.); (S.A.S.)
| | - Federica Vurchio
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, Italy; (A.R.); (G.B.); (F.V.); (A.S.); (S.A.S.)
| | - Rocco Crescenzi
- Department of Information Engineering, Electronics and Telecommunications Sapienza University of Rome, 00184 Rome, Italy;
| | - Andrea Scorza
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, Italy; (A.R.); (G.B.); (F.V.); (A.S.); (S.A.S.)
| | - Pierluigi Bellutti
- Micro Nano Facility, Fondazione Bruno Kessler, 38123 Trento, Italy; (A.B.); (P.B.)
| | - Salvatore Andrea Sciuto
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, Italy; (A.R.); (G.B.); (F.V.); (A.S.); (S.A.S.)
| |
Collapse
|
9
|
De Santis S, Porcelli F, Sotgiu G, Crescenzi A, Ceccucci A, Verri M, Caricato M, Taffon C, Orsini M. Identification of remodeled collagen fibers in tumor stroma by FTIR Micro-spectroscopy: A new approach to recognize the colon carcinoma. Biochim Biophys Acta Mol Basis Dis 2021; 1868:166279. [PMID: 34600082 DOI: 10.1016/j.bbadis.2021.166279] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 12/22/2022]
Abstract
The tumor stroma plays a pivotal role in colon cancer genesis and progression. It was observed that collagen fibers in the extracellular matrix (ECM) of cancer stroma, undergo a strong remodeling. These fibrous proteins result more aligned and compact than in physiological conditions, creating a microenvironment that favors cancer development. In this work, micro-FTIR spectroscopy was applied to investigate the chemical modifications in the tumor stroma. Using Fuzzy C-means clustering, mean spectra from diseased and normal stroma were compared and collagen was found to be responsible for the main differences between them. Specifically, the modified absorptions at 1203, 1238, 1284 cm-1 and 1338 cm-1 wavenumbers, were related to the amide III band and CH2 bending of side chains. These signals are sensitive to the interactions between the α-chains in the triple helices of collagen structure. This provided robust chemical evidence that in cancer ECM, collagen fibers are more parallelized, stiff and ordered than in normal tissue. Principal Component Analysis (PCA) applied to the spectra from malignant and normal stroma confirmed these findings. Using LDA (Linear Discriminant Analysis) classification, the absorptions 1203, 1238, 1284 and 1338 cm-1 were examined as spectral biomarkers, obtaining quite promising results. The use of a PCA-LDA prediction model on samples with moderate tumor degree further showed that the stroma chemical modifications are more indicative of malignancy compared to the epithelium. These preliminary findings have shown that micro-FTIR spectroscopy, focused on collagen signals, could become a promising tool for colon cancer diagnosis.
Collapse
Affiliation(s)
- Serena De Santis
- Department of Engineering, Roma Tre University, via Vito Volterra 62, Roma, Italy.
| | - Francesco Porcelli
- Department of Engineering, Roma Tre University, via Vito Volterra 62, Roma, Italy
| | - Giovanni Sotgiu
- Department of Engineering, Roma Tre University, via Vito Volterra 62, Roma, Italy
| | - Anna Crescenzi
- Pathology Unit, University Hospital Campus Bio-Medico, Rome, Italy
| | - Anita Ceccucci
- Department of Engineering, Roma Tre University, via Vito Volterra 62, Roma, Italy
| | - Martina Verri
- Pathology Unit, University Hospital Campus Bio-Medico, Rome, Italy
| | - Marco Caricato
- Colorectal surgery Unit, University Campus Bio-Medico of Rome, Italy
| | - Chiara Taffon
- Pathology Unit, University Hospital Campus Bio-Medico, Rome, Italy
| | - Monica Orsini
- Department of Engineering, Roma Tre University, via Vito Volterra 62, Roma, Italy
| |
Collapse
|
10
|
In vitro biological and antimicrobial properties of chitosan-based bioceramic coatings on zirconium. Sci Rep 2021; 11:15104. [PMID: 34302008 PMCID: PMC8302640 DOI: 10.1038/s41598-021-94502-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 07/13/2021] [Indexed: 12/13/2022] Open
Abstract
Ca-based porous and rough bioceramic surfaces were coated onto zirconium by micro-arc oxidation (MAO). Subsequently, the MAO-coated zirconium surfaces were covered with an antimicrobial chitosan layer via the dip coating method to develop an antimicrobial, bioactive, and biocompatible composite biopolymer and bioceramic layer for implant applications. Cubic ZrO2, metastable Ca0.15Zr0.85O1.85, and Ca3(PO4)2 were detected on the MAO surface by powder-XRD. The existence of chitosan on the MAO-coated Zr surfaces was verified by FTIR. The micropores and thermal cracks on the bioceramic MAO surface were sealed using a chitosan coating, where the MAO surface was porous and rough. All elements such as Zr, O, Ca, P, and C were homogenously distributed across both surfaces. Moreover, both surfaces indicated hydrophobic properties. However, the contact angle of the MAO surface was lower than that of the chitosan-based MAO surface. In vitro bioactivity on both surfaces was investigated via XRD, SEM, and EDX analyses post-immersion in simulated body fluid (SBF) for 14 days. In vitro bioactivity was significantly enhanced on the chitosan-based MAO surface with respect to the MAO surface. In vitro microbial adhesions on the chitosan-based MAO surfaces were lower than the MAO surfaces for Staphylococcus aureus and Escherichia coli.
Collapse
|
11
|
Bio-Functionalized Chitosan for Bone Tissue Engineering. Int J Mol Sci 2021; 22:ijms22115916. [PMID: 34072888 PMCID: PMC8198664 DOI: 10.3390/ijms22115916] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/24/2021] [Accepted: 05/27/2021] [Indexed: 12/28/2022] Open
Abstract
Hybrid biomaterials allow for the improvement of the biological properties of materials and have been successfully used for implantology in medical applications. The covalent and selective functionalization of materials with bioactive peptides provides favorable results in tissue engineering by supporting cell attachment to the biomaterial through biochemical cues and interaction with membrane receptors. Since the functionalization with bioactive peptides may alter the chemical and physical properties of the biomaterials, in this study we characterized the biological responses of differently functionalized chitosan analogs. Chitosan analogs were produced through the reaction of GRGDSPK (RGD) or FRHRNRKGY (HVP) sequences, both carrying an aldehyde-terminal group, to chitosan. The bio-functionalized polysaccharides, pure or "diluted" with chitosan, were chemically characterized in depth and evaluated for their antimicrobial activities and biocompatibility toward human primary osteoblast cells. The results obtained indicate that the bio-functionalization of chitosan increases human-osteoblast adhesion (p < 0.005) and proliferation (p < 0.005) as compared with chitosan. Overall, the 1:1 mixture of HVP functionalized-chitosan:chitosan is the best compromise between preserving the antibacterial properties of the material and supporting osteoblast differentiation and calcium deposition (p < 0.005 vs. RGD). In conclusion, our results reported that a selected concentration of HVP supported the biomimetic potential of functionalized chitosan better than RGD and preserved the antibacterial properties of chitosan.
Collapse
|
12
|
De Santis S, Sotgiu G, Porcelli F, Marsotto M, Iucci G, Orsini M. A Simple Cerium Coating Strategy for Titanium Oxide Nano-tubes' Bioactivity Enhancement. NANOMATERIALS 2021; 11:nano11020445. [PMID: 33578788 PMCID: PMC7916473 DOI: 10.3390/nano11020445] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/04/2021] [Accepted: 02/06/2021] [Indexed: 12/20/2022]
Abstract
Despite the well-known favorable chemical and mechanical properties of titanium-based materials for orthopedic and dental applications, poor osseointegration of the implants, bacteria adhesion, and excessive inflammatory response from the host remain major problems to be solved. Here, the antioxidant and anti-inflammatory enzyme-like abilities of ceria (CeOx) were coupled to the advantageous features of titanium nanotubes (TiNTs). Cost-effective and fast methods, such as electrochemical anodization and drop casting, were used to build active surfaces with enhanced bioactivity. Surface composition, electrochemical response, and in vitro ability to induce hydroxyapatite (HA) precipitation were evaluated. The amount of cerium in the coating did not significantly affect wettability, yet a growing ability to induce early HA precipitation from simulated body fluid (SBF) was observed as the oxide content at the surface increased. The presence of 4%wt CeOx was also able to stimulate rapid HA maturation in a (poorly) crystalline form, indicating an interesting potential to induce rapid in vivo osseointegration process.
Collapse
Affiliation(s)
- Serena De Santis
- Department of Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy; (G.S.); (F.P.); (M.O.)
- Correspondence:
| | - Giovanni Sotgiu
- Department of Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy; (G.S.); (F.P.); (M.O.)
| | - Francesco Porcelli
- Department of Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy; (G.S.); (F.P.); (M.O.)
| | - Martina Marsotto
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy; (M.M.); (G.I.)
| | - Giovanna Iucci
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy; (M.M.); (G.I.)
| | - Monica Orsini
- Department of Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy; (G.S.); (F.P.); (M.O.)
| |
Collapse
|
13
|
Yang Z, Xi Y, Bai J, Jiang Z, Wang S, Zhang H, Dai W, Chen C, Gou Z, Yang G, Gao C. Covalent grafting of hyperbranched poly-L-lysine on Ti-based implants achieves dual functions of antibacteria and promoted osteointegration in vivo. Biomaterials 2020; 269:120534. [PMID: 33243425 DOI: 10.1016/j.biomaterials.2020.120534] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/29/2020] [Accepted: 11/03/2020] [Indexed: 12/25/2022]
Abstract
The dual functional implants of antibacteria and osteointegration are highly demanded in orthopedic and dentistry, especially for patients who suffer from diabetes or osteoporosis simultaneously. However, there is lack of the facile and robust method to produce clinically applicable implants with this dual function although coatings possessing single function have been extensively developed. Herein, hyperbranched poly-L-lysine (HBPL) polymers were covalently immobilized onto the alkali-heat treated titanium (Ti) substrates and implants by using 3-glycidyloxypropyltrimethoxysilane (GPTMS) as the coupling agent, which displayed excellent antibacterial activity against S. aureus and E. coli with an efficiency as high as 89.4% and 92.2% in vitro, respectively. The HBPL coating also significantly promoted the adhesion, spreading, proliferation and osteogenic differentiation of MC3T3-E1 cells in vitro. Furthermore, the results of a S. aureus infection rat model in vivo ulteriorly verified that the HBPL-modified screws had good antibacterial and anti-inflammatory abilities at an early stage of implantation and better osteointegration compared with the control Ti screws.
Collapse
Affiliation(s)
- Zhijian Yang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yue Xi
- Department of Implantology, Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
| | - Jun Bai
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Zhiwei Jiang
- Department of Implantology, Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
| | - Shuqin Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Haolan Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Wei Dai
- Department of Implantology, Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
| | - Chaozhen Chen
- Department of Implantology, Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
| | - Zhongru Gou
- Bio-nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University, Hangzhou, 310058, China
| | - Guoli Yang
- Department of Implantology, Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China.
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China; Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
14
|
Secchi V, Franchi S, Ciccarelli D, Dettin M, Zamuner A, Serio A, Iucci G, Battocchio C. Biofunctionalization of TiO 2 Surfaces with Self-Assembling Layers of Oligopeptides Covalently Grafted to Chitosan. ACS Biomater Sci Eng 2019; 5:2190-2199. [PMID: 33405771 DOI: 10.1021/acsbiomaterials.9b00430] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In the field of tissue engineering, a promising approach to obtain a bioactive, biomimetic, and antibiotic implant is the functionalization of a "classical" biocompatible material, for example, titanium, with appropriate biomolecules. For this purpose, we propose preparing self-assembling films of multiple components, allowing the mixing of different biofunctionalities "on demand". Self-assembling peptides (SAPs) are synthetic materials characterized by the ability to self-organize in nanostructures both in aqueous solution and as thin or thick films. Moreover, ordered layers of SAPs adhere on titanium surface as a scaffold coating to mimic the extracellular matrix. Chitosan is a versatile hydrophilic polysaccharide derived from chitin, with a broad antimicrobial spectrum to which Gram-negative and Gram-positive bacteria and fungi are highly susceptible, and is already known in the literature for the ability of its derivatives to firmly graft titanium alloys and show protective effects against some bacterial species, either alone or in combination with other antimicrobial substances such as antibiotics or antimicrobial peptides. In this context, we functionalized titanium surfaces with chitosan grafted to EAK16-II (a SAP), obtaining layer-by-layer structures of different degrees of order, depending on the preparative stoichiometry and path. The chemical composition, molecular structure, and arrangement of the obtained biofunctionalized surfaces were investigated by surface-sensitive techniques such as reflection-absorption infrared spectroscopy (RAIRS) and state-of-the-art synchrotron radiation-induced spectroscopies as X-ray photoemission spectroscopy (SR-XPS), and near-edge X-ray absorption fine structure (NEXAFS). Furthermore, was demonstrated that surfaces coated with EAK and Chit-EAK can support hNPs cell attachment and growth.
Collapse
Affiliation(s)
- Valeria Secchi
- Department of Science, Roma Tre University of Rome Via della Vasca Navale 79, Rome 00146, Italy
| | - Stefano Franchi
- Elettra-Sincrotrone Trieste S.c.p.A., Strada statale 14, km 163.5, Basovizza (Trieste) 34149, Italy
| | - Davide Ciccarelli
- Department of Science, Roma Tre University of Rome Via della Vasca Navale 79, Rome 00146, Italy
| | - Monica Dettin
- Department of Industrial Engineering, University of Padua, Via Marzolo, 9, Padua 35131, Italy
| | - Annj Zamuner
- Department of Industrial Engineering, University of Padua, Via Marzolo, 9, Padua 35131, Italy
| | - Andrea Serio
- Centre for Craniofacial & Regenerative Biology, King's College London, London SE1 9RT, United Kingdom
| | - Giovanna Iucci
- Department of Science, Roma Tre University of Rome Via della Vasca Navale 79, Rome 00146, Italy
| | - Chiara Battocchio
- Department of Science, Roma Tre University of Rome Via della Vasca Navale 79, Rome 00146, Italy
| |
Collapse
|