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Miclea LC, Mihailescu M, Tarba N, Brezoiu AM, Sandu AM, Mitran RA, Berger D, Matei C, Moisescu MG, Savopol T. Evaluation of intracellular distribution of folate functionalized silica nanoparticles using fluorescence and hyperspectral enhanced dark field microscopy. NANOSCALE 2022; 14:12744-12756. [PMID: 36000453 DOI: 10.1039/d2nr01821g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Using nanoparticles as carriers for drug delivery systems has become a widely applied strategy in therapeutics and diagnostics. However, the pattern of their intracellular distribution is yet to be clarified. Here we present an in vitro study on the incorporation of mesoporous silica nanoparticles conjugated with folate and loaded with a cytotoxic drug, Irinotecan. The nanoparticles count and distribution within the cell frame were evaluated by means of enhanced dark field microscopy combined with hyperspectral imagery and 3D reconstructions from double-labeled fluorescent samples. An original post-processing procedure was developed to emphasize the nanoparticles' localization in 3D reconstruction of cellular compartments. By these means, it has been shown that the conjugation of mesoporous silica nanoparticles with folate increases the efficiency of nanoparticles entering the cell and their preferential localization in the close vicinity of the nucleus. As revealed by metabolic viability assays, the nanoparticles functionalized with folate enhance the cytotoxic efficiency of Irinotecan.
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Affiliation(s)
- Luminita Claudia Miclea
- Biophysics and Cellular Biotechnology Department, Excellence Center for Research in Biophysics and Cellular Biotechnology, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 8 Eroii Sanitari Blvd., Bucharest, 050474, Romania.
| | - Mona Mihailescu
- Digital Holography Imaging and Processing Laboratory, Fundamental Sciences Applied in Engineering Research Center, Faculty of Applied Sciences, University "Politehnica" of Bucharest, 313 Splaiul Independentei, Bucharest, 060042, Romania.
| | - Nicolae Tarba
- Physics Department, Faculty of Applied Sciences, Doctoral School of Automatic Control and Computers, University "Politehnica" of Bucharest, 313 Splaiul Independentei, Bucharest, 060042, Romania
| | - Ana-Maria Brezoiu
- Department of Inorganic Chemistry, Physical-Chemistry & Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, 1-7 Polizu st., 11061, Bucharest, Romania
| | - Ana Maria Sandu
- CAMPUS Research Center, University "Politehnica" of Bucharest, 313 Splaiul Independentei, Bucharest, 060042, Romania
| | - Raul-Augustin Mitran
- "Ilie Murgulescu" Institute of Physical-Chemistry, Romanian Academy, 202 Splaiul Indepedenţei, Bucharest, 060021, Romania
| | - Daniela Berger
- Department of Inorganic Chemistry, Physical-Chemistry & Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, 1-7 Polizu st., 11061, Bucharest, Romania
| | - Cristian Matei
- Department of Inorganic Chemistry, Physical-Chemistry & Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, 1-7 Polizu st., 11061, Bucharest, Romania
| | - Mihaela Georgeta Moisescu
- Biophysics and Cellular Biotechnology Department, Excellence Center for Research in Biophysics and Cellular Biotechnology, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 8 Eroii Sanitari Blvd., Bucharest, 050474, Romania.
| | - Tudor Savopol
- Biophysics and Cellular Biotechnology Department, Excellence Center for Research in Biophysics and Cellular Biotechnology, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 8 Eroii Sanitari Blvd., Bucharest, 050474, Romania.
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Trzeciak K, Chotera-Ouda A, Bak-Sypien II, Potrzebowski MJ. Mesoporous Silica Particles as Drug Delivery Systems-The State of the Art in Loading Methods and the Recent Progress in Analytical Techniques for Monitoring These Processes. Pharmaceutics 2021; 13:pharmaceutics13070950. [PMID: 34202794 PMCID: PMC8309060 DOI: 10.3390/pharmaceutics13070950] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 12/17/2022] Open
Abstract
Conventional administration of drugs is limited by poor water solubility, low permeability, and mediocre targeting. Safe and effective delivery of drugs and therapeutic agents remains a challenge, especially for complex therapies, such as cancer treatment, pain management, heart failure medication, among several others. Thus, delivery systems designed to improve the pharmacokinetics of loaded molecules, and allowing controlled release and target specific delivery, have received considerable attention in recent years. The last two decades have seen a growing interest among scientists and the pharmaceutical industry in mesoporous silica nanoparticles (MSNs) as drug delivery systems (DDS). This interest is due to the unique physicochemical properties, including high loading capacity, excellent biocompatibility, and easy functionalization. In this review, we discuss the current state of the art related to the preparation of drug-loaded MSNs and their analysis, focusing on the newest advancements, and highlighting the advantages and disadvantages of different methods. Finally, we provide a concise outlook for the remaining challenges in the field.
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Tremi I, Havaki S, Georgitsopoulou S, Lagopati N, Georgakilas V, Gorgoulis VG, Georgakilas AG. A Guide for Using Transmission Electron Microscopy for Studying the Radiosensitizing Effects of Gold Nanoparticles In Vitro. NANOMATERIALS 2021; 11:nano11040859. [PMID: 33801708 PMCID: PMC8065702 DOI: 10.3390/nano11040859] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/18/2021] [Accepted: 03/23/2021] [Indexed: 02/07/2023]
Abstract
The combined effects of ionizing radiation (IR) with high-z metallic nanoparticles (NPs) such as gold has developed a growing interest over the recent years. It is currently accepted that radiosensitization is not only attributed to physical effects but also to underlying chemical and biological mechanisms’ contributions. Low- and high-linear energy transfer (LET) IRs produce DNA damage of different structural types. The combination of IR with gold nanoparticles may increase the clustering of energy deposition events in the vicinity of the NPs due to the production mainly of photoelectrons and Auger electrons. Biological lesions of such origin for example on DNA are more difficult to be repaired compared to isolated lesions and can augment IR’s detrimental effects as shown by numerous studies. Transmission electron microscopy (TEM) offers a unique opportunity to study the complexity of these effects on a very detailed cellular level, in terms of structure, including nanoparticle uptake and damage. Cellular uptake and nanoparticle distribution inside the cell are crucial in order to contribute to an optimal dose enhancement effect. TEM is mostly used to observe the cellular localization of nanoparticles. However, it can also provide valuable insights on the NPs’ radiosensitization pathways, by studying the biochemical mechanisms through immunogold-labelling of antigenic sites at ultrastructural level under high resolution and magnification. Here, our goal is to describe the possibilities, methodologies and proper use of TEM in the interest of studying NPs-based radiosensitization mechanisms.
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Affiliation(s)
- Ioanna Tremi
- DNA Damage Laboratory, Department of Physics, School of Applied Mathematical and Physical Sciences, Zografou Campus, National Technical University of Athens (NTUA), 15780 Athens, Greece;
- Molecular Carcinogenesis Group, Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Street, 11527 Athens, Greece; (S.H.); (N.L.); (V.G.G.)
| | - Sophia Havaki
- Molecular Carcinogenesis Group, Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Street, 11527 Athens, Greece; (S.H.); (N.L.); (V.G.G.)
| | - Sofia Georgitsopoulou
- Department of Material Science, University of Patras, 26504 Patras, Greece; (S.G.); (V.G.)
| | - Nefeli Lagopati
- Molecular Carcinogenesis Group, Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Street, 11527 Athens, Greece; (S.H.); (N.L.); (V.G.G.)
| | - Vasilios Georgakilas
- Department of Material Science, University of Patras, 26504 Patras, Greece; (S.G.); (V.G.)
| | - Vassilis G. Gorgoulis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Street, 11527 Athens, Greece; (S.H.); (N.L.); (V.G.G.)
- Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou Street, 11527 Athens, Greece
- Faculty Institute for Cancer Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester MP13 9PL, UK
- Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, 11527 Athens, Greece
| | - Alexandros G. Georgakilas
- DNA Damage Laboratory, Department of Physics, School of Applied Mathematical and Physical Sciences, Zografou Campus, National Technical University of Athens (NTUA), 15780 Athens, Greece;
- Correspondence:
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4
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Enzyme encapsulation in nanostructured self-assembled structures: Toward biofunctional supramolecular assemblies. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Delpiano G, Casula MF, Piludu M, Corpino R, Ricci PC, Vallet-Regí M, Sanjust E, Monduzzi M, Salis A. Assembly of Multicomponent Nano-Bioconjugates Composed of Mesoporous Silica Nanoparticles, Proteins, and Gold Nanoparticles. ACS OMEGA 2019; 4:11044-11052. [PMID: 31460202 PMCID: PMC6647957 DOI: 10.1021/acsomega.9b01240] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 05/28/2019] [Indexed: 05/05/2023]
Abstract
The purpose of this work was the assembly of multicomponent nano-bioconjugates based on mesoporous silica nanoparticles (MSNs), proteins (bovine serum albumin, BSA, or lysozyme, LYZ), and gold nanoparticles (GNPs). These nano-bioconjugates may find applications in nanomedicine as theranostic devices. Indeed, MSNs can act as drug carriers, proteins stabilize MSNs within the bloodstream, or may have therapeutic or targeting functions. Finally, GNPs can either be used as contrast agents for imaging or for photothermal therapy. Here, amino-functionalized MSNs (MSN-NH2) were synthesized and characterized through various techniques (small angle X-rays scattering TEM, N2 adsorption/desorption isotherms, and thermogravimetric analysis (TGA)). BSA or lysozyme were then grafted on the external surface of MSN-NH2 to obtain MSN-BSA and MSN-LYZ bioconjugates, respectively. Protein immobilization on MSNs surface was confirmed by Fourier transform infrared spectroscopy, ζ-potential measurements, and TGA, which also allowed the estimation of protein loading. The MSN-protein samples were then dispersed in a GNP solution to obtain MSN-protein-GNPs nano-bioconjugates. Transmission electron microscopy (TEM) analysis showed the occurrence of GNPs on the MSN-protein surface, whereas almost no GNPs occurred in the protein-free control samples. Fluorescence and Raman spectroscopies suggested that proteins-GNP interactions involve tryptophan residues.
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Affiliation(s)
- Giulia
Rossella Delpiano
- Department
of Chemical and Geological Sciences, University
of Cagliari, CSGI, INSTM and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Maria F. Casula
- Department
of Chemical and Geological Sciences, University
of Cagliari, CSGI, INSTM and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Marco Piludu
- Department of Biomedical
Sciences and Department of Physics, University of Cagliari,
Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Riccardo Corpino
- Department of Biomedical
Sciences and Department of Physics, University of Cagliari,
Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Pier Carlo Ricci
- Department of Biomedical
Sciences and Department of Physics, University of Cagliari,
Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - María Vallet-Regí
- Departamento
de Quimica Inorganica y Bioinorganica, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigacion
Sanitaria Hospital 12 de Octubre i+12, and Centro de Investigacion
Biomedica en Red de Bioingenieria, Biomateriales y Nanomedicina (CIBER-BBN), Plaza Ramon y Cajal S/N, 28040 Madrid, Spain
| | - Enrico Sanjust
- Department of Biomedical
Sciences and Department of Physics, University of Cagliari,
Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Maura Monduzzi
- Department
of Chemical and Geological Sciences, University
of Cagliari, CSGI, INSTM and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Andrea Salis
- Department
of Chemical and Geological Sciences, University
of Cagliari, CSGI, INSTM and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
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Piludu M, Medda L, Monduzzi M, Salis A. Gold Nanoparticles: A Powerful Tool to Visualize Proteins on Ordered Mesoporous Silica and for the Realization of Theranostic Nanobioconjugates. Int J Mol Sci 2018; 19:E1991. [PMID: 29986530 PMCID: PMC6073571 DOI: 10.3390/ijms19071991] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 07/02/2018] [Accepted: 07/05/2018] [Indexed: 02/07/2023] Open
Abstract
Ordered mesoporous silica (OMS) is a very interesting nanostructured material for the design and engineering of new target and controlled drug-delivery systems. Particularly relevant is the interaction between OMS and proteins. Large pores (6–9 nm) micrometric particles can be used for the realization of a drug depot system where therapeutic proteins are adsorbed either inside the mesopores or on the external surface. Small pores (1–2 nm) mesoporous silica nanoparticles (MSNs), can be injected in the blood stream. In the latter case, therapeutic proteins are mainly adsorbed on the MSNs’ external surface. Whenever a protein-OMS conjugate is prepared, a diagnostic method to locate the protein either on the internal or the external silica surface is of utmost importance. To visualize the fine localization of proteins adsorbed in mesoporous silica micro- and nanoparticles, we have employed specific transmission electron microscopy (TEM) analytical strategies based on the use of gold nanoparticles (GNPs) conjugates. GNPs are gaining in popularity, representing a fundamental tool to design future applications of MSNs in nanomedicine by realizing theranostic nanobioconjugates. It may be pointed out that we are at the very beginning of a new age of the nanomaterial science: the “mesoporous golden age„.
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Affiliation(s)
- Marco Piludu
- Department of Biomedical Science, University of Cagliari, Monserrato, CA 09042, Italy.
| | - Luca Medda
- Department of Chemistry, CSGI, University of Florence, Sesto Fiorentino, FI 50019, Italy.
| | - Maura Monduzzi
- Department of Chemical and Geological Sciences, CSGI, University of Cagliari, Monserrato, CA 90042, Italy.
| | - Andrea Salis
- Department of Chemical and Geological Sciences, CSGI, University of Cagliari, Monserrato, CA 90042, Italy.
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Mesoporous silica nanoparticles functionalized with hyaluronic acid. Effect of the biopolymer chain length on cell internalization. Colloids Surf B Biointerfaces 2018; 168:50-59. [PMID: 29456044 DOI: 10.1016/j.colsurfb.2018.02.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 02/03/2018] [Accepted: 02/10/2018] [Indexed: 01/16/2023]
Abstract
Mesoporous silica nanoparticles (MSNs) were functionalized with amino groups (MSN-NH2) and then with hyaluronic acid, a biocompatible biopolymer which can be recognized by CD44 receptors in tumor cells, to obtain a targeting drug delivery system. To this purpose, three hyaluronic acid samples differing for the molecular weight, namely HAS (8-15 kDa), HAM (30-50 kDa) and HAL (90-130 kDa), were used. The MSN-HAS, MSN-HAM, and MSN-HAL materials were characterized through zeta potential and dynamic light scattering measurements at pH = 7.4 and T = 37 °C to simulate physiological conditions. While zeta potential showed an increasing negative value with the increase of the HA chain length, an anomalous value of the hydrodynamic diameter was observed for MSN-HAL, which was smaller than that of MSN-HAS and MSN-HAM samples. The cellular uptake of MSN-HA samples on HeLa cells at 37 °C was studied by optical and electron microscopy. HA chain length affected significantly the cellular uptake that occurred at a higher extent for MSN-NH2 and MSN-HAS than for MSN-HAM and MSN-HAL samples. Cellular uptake experiments carried out at 4 °C showed that the internalization process was inhibited for MSN-HA samples but not for MSN-NH2. This suggests the occurrence of two different mechanisms of internalization. For MSN-NH2 the uptake is mainly driven by the attractive electrostatic interaction with membrane phospholipids, while MSN-HA internalization involves CD44 receptors overexpressed in HeLa cells.
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Nairi V, Medda L, Monduzzi M, Salis A. Adsorption and release of ampicillin antibiotic from ordered mesoporous silica. J Colloid Interface Sci 2017; 497:217-225. [PMID: 28285049 DOI: 10.1016/j.jcis.2017.03.021] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/27/2017] [Accepted: 03/03/2017] [Indexed: 10/20/2022]
Abstract
In this work the adsorption and the release of ampicillin - a β-lactam penicillin-like antibiotic - from MCM-41, SBA-15, and (amino functionalized) SBA-15-NH2 ordered mesoporous silica (OMS) materials were investigated. The silica matrices differ for their pore size (SBA-15 vs. MCM-41) mainly, and also for surface charge (SBA-15 and MCM-41, vs. SBA-15-NH2). OMS samples were characterized through small-angle X-rays scattering (SAXS), transmission electron microscopy (TEM), N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and potentiometric titrations. The quantification of immobilized and released ampicillin was monitored by mean of UV-Vis spectroscopy. Experimental adsorption isotherms evidenced that ampicillin's loading is not related to the pore size (dBJH) of the adsorbent. Indeed the maximal loadings were 237mg/g for SBA-15 (dBJH=6.5nm), 278mg/g for MCM-41 (dBJH=2.2nm), and 333mg/g for SBA-15-NH2 (dBJH=5.6nm). Loading seems, instead, to be related to the surface charge density (σ) of the sorbent surface. Indeed, at pH 7.4 ampicillin drug is negatively charged and likely prefers to interact with SBA-15-NH2 (σSBA-15-NH2=+0.223Cm-2) rather than the slightly negatively charged silicas (σSBA-15=-0.044Cm-2 and σMCM-41=-0.033Cm-2). Similarly, ampicillin release is affected by interfacial interactions. Indeed, we found a burst release from pure silica samples (SBA-15 and MCM-41), whereas a sustained one from SBA-15-NH2 sample. We explain this behavior as a result of an attractive interaction between the protonated amino group of SBA-15-NH2 and the negatively charged carboxylate group of ampicillin. In summary, in order to obtain a sustained drug release, the chemical nature of the matrix's surface plays a role which is more important than its textural features. SBA-15-NH2 matrix is hence a suitable candidate for local sustained release of antibiotic drugs.
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Affiliation(s)
- Valentina Nairi
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Luca Medda
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy
| | - Maura Monduzzi
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy.
| | - Andrea Salis
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, CA, Italy.
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Salis A, Fanti M, Medda L, Nairi V, Cugia F, Piludu M, Sogos V, Monduzzi M. Mesoporous Silica Nanoparticles Functionalized with Hyaluronic Acid and Chitosan Biopolymers. Effect of Functionalization on Cell Internalization. ACS Biomater Sci Eng 2016; 2:741-751. [PMID: 33440571 DOI: 10.1021/acsbiomaterials.5b00502] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mesoporous silica nanoparticles (MSNs), based on the MCM-41 matrix, were functionalized with amino groups, and then with hyaluronic acid (HA) or chitosan (CHIT) to fabricate bioactive conjugates. The role of the functional groups toward cytotoxicity and cellular uptake was investigated using 3T3 mouse fibroblast cells. A very high biocompatibility of MSN-NH2, MSN-HA and MSN-CHIT matrices was assessed through the MTS biological assay and Coulter counter evaluation. No significant differences in cytotoxicity data arise from the presence of different functional groups in the investigated MSNs. Fluorescence microscopy experiments performed using fluorescein isothiocyanate-conjugated MSN-NH2, MSN-HA, and MSN-CHIT, and transmission electron microscopy experiments performed on slices of the investigated systems embedded in epoxy resins give evidence of significant differences due to type of functionalization in terms of cellular uptake and stability of the particles in the biological medium. MSN-NH2 and MSN-HA conjugates are easily internalized, the uptake of the HA-functionalized MSNs being much higher than that of the -NH2-functionalized MSNs. Differently, MSN-CHIT conjugates tend to give large aggregates dispersed in the medium or localized at the external surface of the cell membranes. Both fluorescence microscopy and TEM images show that the MSNs are distributed in the cytoplasm of the cells in the case of MSN-NH2 and MSN-HA, whereas only a few particles are internalized in the case of MSN-CHIT. Flow cytometry experiments confirmed quantitatively the selectively high cellular uptake of MSN-HA particles.
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Affiliation(s)
- Andrea Salis
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, Cagliari, Italy
| | - Maura Fanti
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato Cagliari, Italy
| | - Luca Medda
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, Cagliari, Italy
| | - Valentina Nairi
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, Cagliari, Italy
| | - Francesca Cugia
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, Cagliari, Italy
| | - Marco Piludu
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato Cagliari, Italy
| | - Valeria Sogos
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato Cagliari, Italy
| | - Maura Monduzzi
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato, Cagliari, Italy
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Cugia F, Sedda S, Pitzalis F, Parsons DF, Monduzzi M, Salis A. Are specific buffer effects the new frontier of Hofmeister phenomena? Insights from lysozyme adsorption on ordered mesoporous silica. RSC Adv 2016. [DOI: 10.1039/c6ra17356j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Different 10 mM buffers at the same nominal pH affect specifically the adsorption of lysozyme on ordered mesoporous silica. It emerges that specific buffer effects should be considered within ‘Hofmeister phenomena’.
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Affiliation(s)
- Francesca Cugia
- Department of Chemical and Geological Sciences
- University of Cagliari-CSGI and CNBS
- Cittadella Universitaria
- 09042-Monserrato
- Italy
| | - Silvia Sedda
- Department of Chemical and Geological Sciences
- University of Cagliari-CSGI and CNBS
- Cittadella Universitaria
- 09042-Monserrato
- Italy
| | - Federica Pitzalis
- Department of Chemical and Geological Sciences
- University of Cagliari-CSGI and CNBS
- Cittadella Universitaria
- 09042-Monserrato
- Italy
| | - Drew F. Parsons
- School of Engineering and Information Technology
- Murdoch University
- Australia
| | - Maura Monduzzi
- Department of Chemical and Geological Sciences
- University of Cagliari-CSGI and CNBS
- Cittadella Universitaria
- 09042-Monserrato
- Italy
| | - Andrea Salis
- Department of Chemical and Geological Sciences
- University of Cagliari-CSGI and CNBS
- Cittadella Universitaria
- 09042-Monserrato
- Italy
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