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Alsharif N, Viczián D, Szcześ A, Szilagyi I. Formulation of Antioxidant Composites by Controlled Heteroaggregation of Cerium Oxide and Manganese Oxide Nanozymes. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:17201-17212. [PMID: 37674655 PMCID: PMC10478773 DOI: 10.1021/acs.jpcc.3c03964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/17/2023] [Indexed: 09/08/2023]
Abstract
Antioxidant composites based on nanozymes [manganese oxide microflakes (MnO2 MFs) and cerium oxide nanoparticles (CeO2 NPs)] were formulated by controlled heteroaggregation. The interparticle attraction via electrostatic forces was systematically tuned with surface functionalization by the poly(diallyldimethyl chloride) (PDADMAC) polyelectrolyte. The PDADMAC-coated MnO2 MFs (PMn) were heteroaggregated with oppositely charged CeO2 NPs to generate the Ce-PMn composite, while the PDADMAC-functionalized CeO2 NPs (PCe) were immobilized onto bare MnO2 MFs, resulting in the Mn-PCe composite. Both the adsorption of PDADMAC and the self-assembly of oppositely charged particles resulted in charge neutralization and charge reversal at appropriately high doses. The interparticle force regimes, the aggregation states, and the physicochemical properties of the relevant dispersions were also highly dependent on the dose of PDADMAC, as well as that of PDADMAC-functionalized metal oxides (PMO) enabling the fine-tuning and control of colloidal stability. The individual enzyme-like activity of either metal oxide was not compromised by PDADMAC adsorption and/or heteroaggregation, leading to the formation of broad-spectrum antioxidant composites exhibiting multiple enzyme-like activities such as superoxide dismutase, oxidase, and peroxidase-type functions. The low cost and ease of preparation, as well as controllable colloidal properties render such composites potential enzyme mimicking agents in various industrial fields, where processable antioxidant systems are needed.
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Affiliation(s)
- Nizar
B. Alsharif
- MTA-SZTE
Lendület Biocolloids Research Group, Department of Physical
Chemistry and Materials Science, Interdisciplinary Research Center, University of Szeged, H-6720 Szeged, Hungary
| | - Dániel Viczián
- MTA-SZTE
Lendület Biocolloids Research Group, Department of Physical
Chemistry and Materials Science, Interdisciplinary Research Center, University of Szeged, H-6720 Szeged, Hungary
| | - Aleksandra Szcześ
- Department
of Interfacial Phenomena, Institute of Chemical Sciences, Faculty
of Chemistry, Maria Curie-Skłodowska
University, PL-20031 Lublin, Poland
| | - Istvan Szilagyi
- MTA-SZTE
Lendület Biocolloids Research Group, Department of Physical
Chemistry and Materials Science, Interdisciplinary Research Center, University of Szeged, H-6720 Szeged, Hungary
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Maurizi L, Bellat V, Moreau M, De Maistre E, Boudon J, Dumont L, Denat F, Vandroux D, Millot N. Titanate nanoribbon-based nanobiohybrid for potential applications in regenerative medicine. RSC Adv 2022; 12:26875-26881. [PMID: 36320832 PMCID: PMC9490774 DOI: 10.1039/d2ra04753e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/14/2022] [Indexed: 11/26/2022] Open
Abstract
Nanoparticles capable of mimicking natural tissues represent a major technological advancement in regenerative medicine. In this pilot study, the development of a new nanohybrid composed of titanate nanoribbons to mimic the extracellular matrix is reported. During the first phase, nanoribbons were synthesized by hydrothermal treatment. Subsequently, titanate nanoribbons were functionalized by heterobifunctional polyethylene-glycol (PEG) to graft type I collagen on their surface. Biological properties of this new nanobiohybrid such as cytotoxicity to cardiac cells and platelet aggregation ability were evaluated. The so-formed nanobiohybrid permits cellular adhesion and proliferation favoring fine cardiac tissue healing and regeneration. Titanate nanoribbons functionalized by heterobifunctional polymer and type I collagen for cellular adhesion and proliferation. This new nanobiohybrid affected neither cytotoxicity nor platelet aggregation ability.![]()
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Affiliation(s)
- Lionel Maurizi
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS/Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078 Dijon, France
| | - Vanessa Bellat
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS/Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078 Dijon, France
- Société NVH Medicinal, Dijon, France
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine, 413 E 69th Street, New York, NY, 10021, USA
| | - Mathieu Moreau
- Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 6302 CNRS/Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078 Dijon, France
| | | | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS/Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078 Dijon, France
| | | | - Franck Denat
- Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 6302 CNRS/Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078 Dijon, France
| | | | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS/Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078 Dijon, France
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Loiseau A, Boudon J, Mirjolet C, Morgand V, Millot N. About the Influence of PEG Spacers on the Cytotoxicity of Titanate Nanotubes-Docetaxel Nanohybrids against a Prostate Cancer Cell Line. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2733. [PMID: 34685172 PMCID: PMC8539671 DOI: 10.3390/nano11102733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 12/16/2022]
Abstract
The association between chemotherapeutic drugs and metal oxide nanoparticles has sparked a rapidly growing interest in cancer nanomedicine. The elaboration of new engineered docetaxel (DTX)-nanocarriers based on titanate nanotubes (TiONts) was reported. The idea was to maintain the drug inside cancer cells and avoid multidrug resistance mechanisms, which often limit drug efficacy by decreasing their intracellular concentrations in tumor cells. HS-PEGn-COOH (PEG: polyethylene glycol, n = 3000, 5000, 10,000) was conjugated, in an organic medium by covalent linkages, on TiONts surface. This study aimed to investigate the influence of different PEG derivatives chain lengths on the TiONts colloidal stability, on the PEGn density and conformation, as well as on the DTX biological activity in a prostate cancer model (human PC-3 prostate adenocarcinoma cells). In vitro tests highlighted significant cytotoxicities of the drug after loading DTX on PEGn-modified TiONts (TiONts-PEGn-DTX). Higher grafting densities for shorter PEGylated chains were most favorable on DTX cytotoxicity by promoting both colloidal stability in biological media and cells internalization. This promising strategy involves a better understanding of nanohybrid engineering, particularly on the PEGylated chain length influence, and can thus become a potent tool in nanomedicine to fight against cancer.
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Affiliation(s)
- Alexis Loiseau
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS Université Bourgogne Franche-Comté, BP 47870, CEDEX, 21078 Dijon, France;
| | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS Université Bourgogne Franche-Comté, BP 47870, CEDEX, 21078 Dijon, France;
| | - Céline Mirjolet
- INSERM 1231, Cadir Team, CEDEX, 21078 Dijon, France;
- Radiotherapy Department, Georges-Francois Leclerc Cancer Center, CEDEX, 21079 Dijon, France;
| | - Véronique Morgand
- Radiotherapy Department, Georges-Francois Leclerc Cancer Center, CEDEX, 21079 Dijon, France;
| | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS Université Bourgogne Franche-Comté, BP 47870, CEDEX, 21078 Dijon, France;
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Mercadante V, Scarpa E, De Matteis V, Rizzello L, Poma A. Engineering Polymeric Nanosystems against Oral Diseases. Molecules 2021; 26:2229. [PMID: 33924289 PMCID: PMC8070659 DOI: 10.3390/molecules26082229] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/31/2021] [Accepted: 04/06/2021] [Indexed: 12/26/2022] Open
Abstract
Nanotechnology and nanoparticles (NPs) are at the forefront of modern research, particularly in the case of healthcare therapeutic applications. Polymeric NPs, specifically, hold high promise for these purposes, including towards oral diseases. Careful optimisation of the production of polymeric NPs, however, is required to generate a product which can be easily translated from a laboratory environment to the actual clinical usage. Indeed, considerations such as biocompatibility, biodistribution, and biodegradability are paramount. Moreover, a pre-clinical assessment in adequate in vitro, ex vivo or in vivo model is also required. Last but not least, considerations for the scale-up are also important, together with an appropriate clinical testing pathway. This review aims to eviscerate the above topics, sourcing at examples from the recent literature to put in context the current most burdening oral diseases and the most promising polymeric NPs which would be suitable against them.
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Affiliation(s)
- Valeria Mercadante
- Division of Oral Medicine, UCL Eastman Dental Institute, Bloomsbury Campus, Rockefeller Building, 21 University Street, London WC1E 6DE, UK;
| | - Edoardo Scarpa
- Department of Pharmaceutical Sciences (DISFARM), National Institute of Molecular Genetics (INGM), Via G. Balzaretti 9, 20133 Milan, Italy; (E.S.); (L.R.)
- National Institute of Molecular Genetics (INGM), Via F. Sforza 35, 20122 Milan, Italy
| | - Valeria De Matteis
- Department of Mathematics and Physics “Ennio De Giorgi”, Via Monteroni, c/o Campus Ecotekne, 73100 Lecce, Italy;
| | - Loris Rizzello
- Department of Pharmaceutical Sciences (DISFARM), National Institute of Molecular Genetics (INGM), Via G. Balzaretti 9, 20133 Milan, Italy; (E.S.); (L.R.)
- National Institute of Molecular Genetics (INGM), Via F. Sforza 35, 20122 Milan, Italy
| | - Alessandro Poma
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, Royal Free Hospital, UCL Medical School, Rowland Hill Street, London NW3 2PF, UK
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Loiseau A, Boudon J, Oudot A, Moreau M, Boidot R, Chassagnon R, Mohamed Saïd N, Roux S, Mirjolet C, Millot N. Titanate Nanotubes Engineered with Gold Nanoparticles and Docetaxel to Enhance Radiotherapy on Xenografted Prostate Tumors. Cancers (Basel) 2019; 11:cancers11121962. [PMID: 31817706 PMCID: PMC6966691 DOI: 10.3390/cancers11121962] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/29/2019] [Accepted: 12/02/2019] [Indexed: 12/18/2022] Open
Abstract
Nanohybrids based on titanate nanotubes (TiONts) were developed to fight prostate cancer by intratumoral (IT) injection, and particular attention was paid to their step-by-step synthesis. TiONts were synthesized by a hydrothermal process. To develop the custom-engineered nanohybrids, the surface of TiONts was coated beforehand with a siloxane (APTES), and coupled with both dithiolated diethylenetriaminepentaacetic acid-modified gold nanoparticles (Au@DTDTPA NPs) and a heterobifunctional polymer (PEG3000) to significantly improve suspension stability and biocompatibility of TiONts for targeted biomedical applications. The pre-functionalized surface of this scaffold had reactive sites to graft therapeutic agents, such as docetaxel (DTX). This novel combination, aimed at retaining the AuNPs inside the tumor via TiONts, was able to enhance the radiation effect. Nanohybrids have been extensively characterized and were detectable by SPECT/CT imaging through grafted Au@DTDTPA NPs, radiolabeled with 111In. In vitro results showed that TiONts-AuNPs-PEG3000-DTX had a substantial cytotoxic activity on human PC-3 prostate adenocarcinoma cells, unlike initial nanohybrids without DTX (Au@DTDTPA NPs and TiONts-AuNPs-PEG3000). Biodistribution studies demonstrated that these novel nanocarriers, consisting of AuNP- and DTX-grafted TiONts, were retained within the tumor for at least 20 days on mice PC-3 xenografted tumors after IT injection, delaying tumor growth upon irradiation.
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Affiliation(s)
- Alexis Loiseau
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche Comté, BP 47870, 21078 Dijon Cedex, France; (A.L.); (R.C.)
| | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche Comté, BP 47870, 21078 Dijon Cedex, France; (A.L.); (R.C.)
- Correspondence: (J.B.); (C.M.); (N.M.)
| | - Alexandra Oudot
- Preclinical Imaging Platform, Nuclear Medicine Department, Georges-Francois Leclerc Cancer Center, 21079 Dijon Cedex, France;
| | - Mathieu Moreau
- Institut de Chimie Moléculaire de l’Université Bourgogne, UMR 6302, CNRS-Université Bourgogne Franche Comté, 21078 Dijon Cedex, France;
| | - Romain Boidot
- Department of Biology and Pathology of Tumors, Georges-François Leclerc Cancer Center–UNICANCER, 21079 Dijon Cedex, France;
| | - Rémi Chassagnon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche Comté, BP 47870, 21078 Dijon Cedex, France; (A.L.); (R.C.)
| | - Nasser Mohamed Saïd
- Institut UTINAM, UMR 6213, CNRS-Université Bourgogne Franche-Comté, 25030 Besançon Cedex, France; (N.M.S.); (S.R.)
| | - Stéphane Roux
- Institut UTINAM, UMR 6213, CNRS-Université Bourgogne Franche-Comté, 25030 Besançon Cedex, France; (N.M.S.); (S.R.)
| | - Céline Mirjolet
- INSERM LNC UMR 1231, 21078 Dijon Cedex, France
- Radiotherapy Department, Georges-Francois Leclerc Cancer Center, 21079 Dijon Cedex, France
- Correspondence: (J.B.); (C.M.); (N.M.)
| | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche Comté, BP 47870, 21078 Dijon Cedex, France; (A.L.); (R.C.)
- Correspondence: (J.B.); (C.M.); (N.M.)
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Ranjous Y, Regdon G, Pintye-Hódi K, Sovány T. Standpoint on the priority of TNTs and CNTs as targeted drug delivery systems. Drug Discov Today 2019; 24:1704-1709. [PMID: 31158513 DOI: 10.1016/j.drudis.2019.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/05/2019] [Accepted: 05/28/2019] [Indexed: 12/21/2022]
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Varache M, Bezverkhyy I, Weber G, Saviot L, Chassagnon R, Baras F, Bouyer F. Loading of Cisplatin into Mesoporous Silica Nanoparticles: Effect of Surface Functionalization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8984-8995. [PMID: 31244247 DOI: 10.1021/acs.langmuir.9b00954] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cisplatin ( cis-diaminedichloroplatinum(II), CDDP) plays a crucial role in the treatment of various malignant tumors. However, its clinical efficacy and applicability are restricted by issues of toxicity and resistance. Here, for drug delivery purposes, the outer surface of MCM-41 mesoporous silica nanoparticles (MSNs) was functionalized with poly(ethylene glycol) ( Mw = 10 000 g/mol) or low-molecular-weight ( Mw = 1800 g/mol) branched polyethyleneimine (PEI). Given the strong affinity of sulfur for platinum, thiol-functionalized MSNs were synthesized for comparison by co-condensation with (3-mercaptopropyl)triethoxysilane. CDDP loading was performed either by adsorption or impregnation in aqueous media without the use of dimethyl sulfoxide as a solubilizer. CDDP loading capacities obtained by impregnation were higher than those obtained by adsorption and varied from 3.9 to 16.1 wt %, depending on the functional group. Loaded nanomaterials were characterized by scanning electron microscopy, scanning transmission electron microscopy-high-angle annular dark-field, and Raman spectroscopy. Depending on the functional groups, platinum-based species were either dispersed in the nanomaterials as nanocrystals or uniformly distributed as molecular species. The spectral signature of CDDP was strongly modified when platinum species were homogeneously distributed within the nanomaterials. Preliminary drug release studies performed at 37 °C showed that the behavior of CDDP-loaded MSNs strongly depends on the nature of the present functional groups. Among the functionalization routes investigated in this paper, PEI-based functionalization showed the most promising results for further applications in controlled drug release with the absence of burst release and a sustained release over 72 h.
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Affiliation(s)
- Mathieu Varache
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
| | - Igor Bezverkhyy
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
| | - Guy Weber
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
| | - Lucien Saviot
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
| | - Rémi Chassagnon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
| | - Florence Baras
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
| | - Frédéric Bouyer
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté , 9 Avenue Alain Savary , BP 47 870, F-21078 Dijon Cedex , France
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Loiseau A, Asila V, Boitel-Aullen G, Lam M, Salmain M, Boujday S. Silver-Based Plasmonic Nanoparticles for and Their Use in Biosensing. BIOSENSORS-BASEL 2019; 9:bios9020078. [PMID: 31185689 PMCID: PMC6627098 DOI: 10.3390/bios9020078] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/27/2019] [Accepted: 05/31/2019] [Indexed: 12/11/2022]
Abstract
The localized surface plasmon resonance (LSPR) property of metallic nanoparticles is widely exploited for chemical and biological sensing. Selective biosensing of molecules using functionalized nanoparticles has become a major research interdisciplinary area between chemistry, biology and material science. Noble metals, especially gold (Au) and silver (Ag) nanoparticles, exhibit unique and tunable plasmonic properties; the control over these metal nanostructures size and shape allows manipulating their LSPR and their response to the local environment. In this review, we will focus on Ag-based nanoparticles, a metal that has probably played the most important role in the development of the latest plasmonic applications, owing to its unique properties. We will first browse the methods for AgNPs synthesis allowing for controlled size, uniformity and shape. Ag-based biosensing is often performed with coated particles; therefore, in a second part, we will explore various coating strategies (organics, polymers, and inorganics) and their influence on coated-AgNPs properties. The third part will be devoted to the combination of gold and silver for plasmonic biosensing, in particular the use of mixed Ag and AuNPs, i.e., AgAu alloys or Ag-Au core@shell nanoparticles will be outlined. In the last part, selected examples of Ag and AgAu-based plasmonic biosensors will be presented.
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Affiliation(s)
- Alexis Loiseau
- Laboratoire de Réactivité de Surface (LRS), Sorbonne Université, CNRS, UMR 7197, 4 place Jussieu, F-75005 Paris, France.
| | - Victoire Asila
- Sorbonne Université, Faculté des Sciences et Ingénierie, Master de Chimie, Profil MatNanoBio, 4 place Jussieu, F-75005 Paris, France.
| | - Gabriel Boitel-Aullen
- Sorbonne Université, Faculté des Sciences et Ingénierie, Master de Chimie, Profil MatNanoBio, 4 place Jussieu, F-75005 Paris, France.
| | - Mylan Lam
- Sorbonne Université, Faculté des Sciences et Ingénierie, Master de Chimie, Profil MatNanoBio, 4 place Jussieu, F-75005 Paris, France.
| | - Michèle Salmain
- Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France.
| | - Souhir Boujday
- Laboratoire de Réactivité de Surface (LRS), Sorbonne Université, CNRS, UMR 7197, 4 place Jussieu, F-75005 Paris, France.
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Sáringer S, Rouster P, Szilágyi I. Regulation of the Stability of Titania Nanosheet Dispersions with Oppositely and Like-Charged Polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4986-4994. [PMID: 30888825 DOI: 10.1021/acs.langmuir.9b00242] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Charging and aggregation processes of titania nanosheets (TNS) were extensively studied in the presence of oppositely charged or like-charged polyelectrolytes in aqueous dispersions. The surface charge of the TNS was systematically varied by the pH; therefore, positive nanosheets were obtained at pH 4 and negative ones at pH 10. Strong adsorption of poly(styrene sulfonate) (PSS) of high negative line charge density on the TNS was observed at pH 4, leading to charge neutralization and reversal of the original sign of charge of the nanosheets. The adsorption of like-charged poly(diallyldimethylammonium chloride) (PDADMAC) was also feasible through a hydrophobic interaction. The predominating interparticle forces were mainly of the DLVO-type, but additional patch-charge attraction also took place in the case of PSS at low surface coverage. The TNS was found to be hydrophilic at pH 10 and no adsorption of like-charged PSS was possible because of strong electrostatic repulsion between the polyelectrolyte and the surface. The PDADMAC showed high affinity to the oppositely charged TNS surface in alkaline dispersions, giving rise to neutral and positively charged nanosheets at appropriate polyelectrolyte doses. Formation of a saturated PDADMAC layer on the TNS led to high resistance against salt-induced aggregation through the electrosteric stabilization mechanism. These results shed light on the importance of polyelectrolyte concentration, ionic strength, and charge balance on the colloidal stability of TNS, which is especially important in applications, where the nanosheets are dispersed in complex solution containing polymeric compounds and electrolytes.
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Affiliation(s)
| | - Paul Rouster
- Institute of Condensed Matter and Nanosciences-Bio and Soft Matter , Université Catholique de Louvain , B-1348 Louvain-la-Neuve , Belgium
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Valdeón DH, Araujo PZ, Daz M, Perotti NI. Immobilization of Fructofuranosidase from Aureobasidium sp. Onto TiO2 and Its Encapsulation on Gellan Gum for FOS Production. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2019. [DOI: 10.1515/ijcre-2018-0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Fructofuranosidase (EC 3.2.1.26) from Aureobasidium sp. ATCC 20524, recovered from 5 L fermented medium, purified by two simple steps with a yield of 65 % and a purification factor of 16, was immobilized by adsorption onto titanium dioxide (FTIO). The enzyme was also covalently immobilized onto TiO2 coated with polyethyleneimine (FTIOP) and encapsulated in gellan gum (FTIOPG). FTIO and FTIOP recorded an activity of 903 U g−1 and 9212 U g−1, respectively. The immobilized enzyme showed high activity and stability at pH levels ranging from 4.0 to 8.0 and there were no changes in the temperature profile for either methodology when compared with free fructofuranosidase. The immobilized biocatalysts were reused 7 times for FOS production without significant activity loss, except FTIO at pH 5.0. Gellan gum was used for FTIOP encapsulation. FOS production was performed in a batch and a continuous reactor using FTIOPG as a biocatalyst. Batch conversion (gFOS/ginitial sucrose) was around 60 % for initial sucrose concentrations of 100, 300 and 600 g L−1, at a time of maximum conversion. Fixed-bed reactor operational stability was remarkable, providing a constant FOS production in the outlet of the column during 720 h.
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Beneš H, Popelková D, Šturcová A, Popelka Š, Jůza J, Pop-Georgievski O, Konefał M, Hrubý M. Aqueous-Based Functionalizations of Titanate Nanotubes: A Straightforward Route to High-Performance Epoxy Composites with Interfacially Bonded Nanofillers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hynek Beneš
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Daniela Popelková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Adriana Šturcová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Štěpán Popelka
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Josef Jůza
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Magdalena Konefał
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Martin Hrubý
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
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12
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Sruthi S, Loiseau A, Boudon J, Sallem F, Maurizi L, Mohanan PV, Lizard G, Millot N. In vitro interaction and biocompatibility of titanate nanotubes with microglial cells. Toxicol Appl Pharmacol 2018; 353:74-86. [PMID: 29908245 DOI: 10.1016/j.taap.2018.06.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/11/2018] [Accepted: 06/12/2018] [Indexed: 01/04/2023]
Abstract
Titanate nanotubes (TiONts) are promising agents for biomedical applications. Microglial activation and associated oxidative burst are major challenges in drug delivery applications across the brain. Here, TiONts were designed for drug delivery systems by functionalizing them with (3-aminopropyl) triethoxysilane (APTES), their interactions and biocompatibility were studied in vitro using murine microglial BV-2 cells. TiONts-APTES exposure resulted in increased ROS production and transient mitochondrial hyperpolarization. However, there was no indication of microglial proliferation in BV-2 cells as suggested by cell cycle analysis and morphology evaluation. The endocytosis as well as passive diffusion mediated TiONts-APTES internalization were proved by transmission electron microscopy (TEM) with and without amiloride, an endocytosis inhibiting agent. In addition, the TiONts-APTES exhibited good biocompatibility on microglial BV-2 cells as revealed by the plasma membrane integrity, lysosmal membrane integrity, morphology and viability analysis.
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Affiliation(s)
- S Sruthi
- Toxicology Division, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695 012, Kerala, India; Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS/Université Bourgogne Franche-Comté, 9 av. A. Savary BP 47 870, 21 078 Dijon, France
| | - A Loiseau
- Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS/Université Bourgogne Franche-Comté, 9 av. A. Savary BP 47 870, 21 078 Dijon, France
| | - J Boudon
- Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS/Université Bourgogne Franche-Comté, 9 av. A. Savary BP 47 870, 21 078 Dijon, France
| | - F Sallem
- Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS/Université Bourgogne Franche-Comté, 9 av. A. Savary BP 47 870, 21 078 Dijon, France
| | - L Maurizi
- Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS/Université Bourgogne Franche-Comté, 9 av. A. Savary BP 47 870, 21 078 Dijon, France
| | - P V Mohanan
- Toxicology Division, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695 012, Kerala, India
| | - G Lizard
- Faculté des Sciences Gabriel, Laboratoire Bio-PeroxIL, EA7270, Université Bourgogne Franche-Comté/Inserm, 6 Bd Gabriel, 21 000 Dijon, France.
| | - N Millot
- Nanosciences Department, Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS/Université Bourgogne Franche-Comté, 9 av. A. Savary BP 47 870, 21 078 Dijon, France.
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13
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Thorat ND, Lemine OM, Bohara RA, Omri K, El Mir L, Tofail SAM. Superparamagnetic iron oxide nanocargoes for combined cancer thermotherapy and MRI applications. Phys Chem Chem Phys 2018; 18:21331-9. [PMID: 27427175 DOI: 10.1039/c6cp03430f] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nanoparticle-based cancer diagnosis-therapy integrative systems (cancer theranostics) represent an emerging approach in oncology. To address this issue in the present work iron oxide (γ-Fe2O3-maghemite) nanoparticles (IONPs) were encapsulated within the matrix of (bis(p-sulfonatophenyl)phenylphosphine)-methoxypolyethylene glycol-thiol (mPEG) polymer vesicles using a two-step process for active chemotherapeutic cargo loading in cancer theranostics. This formation method gives simple access to highly reactive surface groups present on IONPs together with good control over the vesicle size (50-100 nm). The simultaneous loading of a chemotherapeutic drug cargo (doxorubicin) and its in vitro release in cancer cells was achieved. The feasibility of controlled drug release under different pH conditions was demonstrated in the case of encapsulated doxorubicin molecules, showing the viability of the concept of stimulated drug delivery for magneto-chemotherapy. These polymer-magnetic nanocargoes (PMNCs) exhibit enhanced contrast properties that open potential applications for magnetic resonance imaging. These self-assembled magnetic polymersomes can be used as efficient multifunctional nanocarriers for combined therapy and imaging.
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Affiliation(s)
- Nanasaheb D Thorat
- Department of Physics & Energy, University of Limerick, Limerick, Ireland. and Materials & Surface Science Institute, Bernal Institute, University of Limerick, Limerick, Ireland
| | - O M Lemine
- Physics Department, College of Sciences, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
| | - Raghvendra A Bohara
- Center for Interdisciplinary Research, D. Y. Patil University, Kolhapur 416006, India
| | - Karim Omri
- Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes, Tunisia
| | - L El Mir
- Physics Department, College of Sciences, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia and Center for Interdisciplinary Research, D. Y. Patil University, Kolhapur 416006, India
| | - Syed A M Tofail
- Department of Physics & Energy, University of Limerick, Limerick, Ireland. and Materials & Surface Science Institute, Bernal Institute, University of Limerick, Limerick, Ireland
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14
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Rouster P, Pavlovic M, Horváth E, Forró L, Dey SK, Szilagyi I. Influence of Protamine Functionalization on the Colloidal Stability of 1D and 2D Titanium Oxide Nanostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9750-9758. [PMID: 28829607 DOI: 10.1021/acs.langmuir.7b01815] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The colloidal stability of titanium oxide nanosheets (TNS) and nanowires (TiONW) was studied in the presence of protamine (natural polyelectrolyte) in aqueous dispersions, where the nanostructures possessed negative net charge, and the protamine was positively charged. Regardless of their shape, similar charging and aggregation behaviors were observed for both TNS and TiONW. Electrophoretic experiments performed at different protamine loadings revealed that the adsorption of protamine led to charge neutralization and charge inversion depending on the polyelectrolyte dose applied. Light scattering measurements indicated unstable dispersions once the surface charge was close to zero or slow aggregation below and above the charge neutralization point with negatively or positively charged nanostructures, respectively. These stability regimes were confirmed by the electron microscopy images taken at different polyelectrolyte loadings. The protamine dose and salt-dependent colloidal stability confirmed the presence of DLVO-type interparticle forces, and no experimental evidence was found for additional interactions (e.g., patch-charge, hydrophobic, or steric forces), which are usually present in similar polyelectrolyte-particle systems. These findings indicate that the polyelectrolyte adsorbs on the TNS and TiONW surfaces in a flat and extended conformation giving rise to the absence of surface heterogeneities. Therefore, protamine is an excellent biocompatible candidate to form smooth surfaces, for instance in multilayers composed of polyelectrolytes and particles to be used in biomedical applications.
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Affiliation(s)
- Paul Rouster
- School of Chemistry and Biochemistry, University of Geneva , CH-1205 Geneva, Switzerland
| | - Marko Pavlovic
- School of Chemistry and Biochemistry, University of Geneva , CH-1205 Geneva, Switzerland
| | - Endre Horváth
- School of Basic Sciences, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - László Forró
- School of Basic Sciences, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - Sandwip K Dey
- Materials Program, School for Engineering of Matter, Transport and Energy, Arizona State University , Tempe, Arizona 85287, United States
| | - Istvan Szilagyi
- School of Chemistry and Biochemistry, University of Geneva , CH-1205 Geneva, Switzerland
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15
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Ran F, Lei W, Cui Y, Jiao J, Mao Y, Wang S, Wang S. Size effect on oral absorption in polymer-functionalized mesoporous carbon nanoparticles. J Colloid Interface Sci 2017; 511:57-66. [PMID: 28972896 DOI: 10.1016/j.jcis.2017.09.088] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 02/01/2023]
Abstract
In this manuscript, the effect of the particle size of polymer-functionalized mesoporous carbon (MPP) nanoparticles on enhancing oral absorption of a water-insoluble drug is first investigated. The insoluble drug, fenofibrate (Fen), was selected as the model drug loaded in the MPP nanoparticles. MPP nanoparticles with different particle sizes were designed for improving the oral bioavailability of drugs, in which the branched polyethyleneimine (PEI) and polyacrylic acid (PAA) were modified on the surfaces of mesoporous carbon nanoparticles (MCNs) with amide bonds. In addition, PEI-functionalized carbon quantum dots (PCA) and radioisotope 125I were applied to label the MPP nanoparticles to trace in the vivo process. According to the data, the MPP nanoparticles could markedly improve the dissolution rate and oral bioavailability of Fen. Interestingly, the MPP nanoparticle size had a notable effect on Fen oral absorption, and intermediate sized MPP nanoparticles were expected to be more ideal oral drug carriers. The nanoparticles were safe and easily excreted. These findings present the prospect of MPP nanoparticles for oral application, and guides the rational design of an oral delivery system with respect to particle size.
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Affiliation(s)
- Fu Ran
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Wei Lei
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Yu Cui
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Jian Jiao
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Yuling Mao
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Shengyu Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Siling Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China.
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16
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Mirjolet C, Boudon J, Loiseau A, Chevrier S, Boidot R, Oudot A, Collin B, Martin E, Joy PA, Millot N, Créhange G. Docetaxel-titanate nanotubes enhance radiosensitivity in an androgen-independent prostate cancer model. Int J Nanomedicine 2017; 12:6357-6364. [PMID: 28919739 PMCID: PMC5587207 DOI: 10.2147/ijn.s139167] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Around 40% of high-risk prostate cancer patients who undergo radiotherapy (RT) will experience biochemical failure. Chemotherapy, such as docetaxel (DTX), can enhance the efficacy of RT. Multidrug resistance mechanisms often limit drug efficacy by decreasing intracellular concentrations of drugs in tumor cells. It is, therefore, of interest to develop nanocarriers of DTX to maintain the drug inside cancer cells and thus improve treatment efficacy. The purpose of this study was to investigate the use of titanate nanotubes (TiONts) to develop a TiONts-DTX nanocarrier and to evaluate its radiosensitizing in vivo efficacy in a prostate cancer model. In vitro cytotoxic activity of TiONts-DTX was evaluated using an MTS assay. The biodistribution of TiONts-DTX was analyzed in vivo by single-photon emission computed tomography. The benefit of TiONts-DTX associated with RT was evaluated in vivo. Eight groups with seven mice in each were used to evaluate the efficacy of the nanohybrid combined with RT: control with buffer IT injection ± RT, free DXL ± RT, TiONts ± RT and TiONts-DXL ± RT. Mouse behavior, health status and tumor volume were monitored twice a week until the tumor volume reached a maximum of 2,000 mm3. More than 70% of nanohybrids were localized inside the tumor 96 h after administration. Tumor growth was significantly slowed by TiONts-DTX associated with RT, compared with free DTX in the same conditions (P=0.013). These results suggest that TiONts-DTX improved RT efficacy and might enhance local control in high-risk localized prostate cancer.
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Affiliation(s)
- Céline Mirjolet
- Department of Radiation Oncology, Center Georges-François Leclerc, Dijon, France
| | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, Dijon, France
| | - Alexis Loiseau
- Laboratoire Interdisciplinaire Carnot de Bourgogne, Dijon, France
| | - Sandy Chevrier
- Department of Radiation Oncology, Center Georges-François Leclerc, Dijon, France
| | - Romain Boidot
- Department of Radiation Oncology, Center Georges-François Leclerc, Dijon, France
| | - Alexandra Oudot
- Preclinical Imaging Platform, Nuclear Medicine Department, Center Georges-François Leclerc, Dijon, France
| | - Bertrand Collin
- Preclinical Imaging Platform, Nuclear Medicine Department, Center Georges-François Leclerc, Dijon, France
| | - Etienne Martin
- Department of Radiation Oncology, Center Georges-François Leclerc, Dijon, France
| | | | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne, Dijon, France
| | - Gilles Créhange
- Department of Radiation Oncology, Center Georges-François Leclerc, Dijon, France
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17
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Loiseau A, Boudon J, Mirjolet C, Créhange G, Millot N. Taxane-Grafted Metal-Oxide Nanoparticles as a New Theranostic Tool against Cancer: The Promising Example of Docetaxel-Functionalized Titanate Nanotubes on Prostate Tumors. Adv Healthc Mater 2017; 6. [PMID: 28516460 DOI: 10.1002/adhm.201700245] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/12/2017] [Indexed: 12/21/2022]
Abstract
The combination of anticancer drugs and metal oxide nanoparticles is of great interest in cancer nanomedicine. Here, the development of a new nanohybrid, titanate nanotube-docetaxel (TiONts-DTX) is reported, the two parts of which are conjugated by covalent linkages. Unlike most nanoparticles currently being developed for biomedical purposes, TiONts present a needle-shaped morphology. The surface of TiONts is linked with 3-aminopropyl triethoxysilane and with a hetero-bifunctional polymer (polyethylene glycol) to create well-dispersed and biocompatible nanovectors. The prefunctionalized surface of this scaffold has valuable attachments to graft therapeutic agents (DTX in our case) as well as chelating agents (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) to monitor the nanohybrids. To evaluate drug efficacy, in vitro tests have demonstrated that the association between TiONts and DTX shows cytotoxic activity against a hormone-refractory prostate cancer cell line (22Rv1) whereas TiONts without DTX do not. Finally, the first in vivo tests with intratumoral injections show that more than 70% of TiONts nanovectors are retained within the tumor for at least 7 d. Moreover, tumor growth in mice receiving TiONts-DTX is significantly slower than that in mice receiving free DTX. This nanohybrid can thus become a promising new tool in biomedicine to fight against prostate cancer.
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Affiliation(s)
- Alexis Loiseau
- Laboratoire Interdisciplinaire Carnot de Bourgogne; UMR 6303 CNRS; Université Bourgogne Franche-Comté; BP 47870 21078 Dijon Cedex France
| | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne; UMR 6303 CNRS; Université Bourgogne Franche-Comté; BP 47870 21078 Dijon Cedex France
| | - Céline Mirjolet
- Centre Georges-François Leclerc; BP 77980 21079 Dijon Cedex France
| | - Gilles Créhange
- Centre Georges-François Leclerc; BP 77980 21079 Dijon Cedex France
- Le2i, UMR 6306 CNRS; Université Bourgogne Franche-Comté; BP 47870 21078 Dijon Cedex France
| | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne; UMR 6303 CNRS; Université Bourgogne Franche-Comté; BP 47870 21078 Dijon Cedex France
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Sallem F, Boudon J, Heintz O, Séverin I, Megriche A, Millot N. Synthesis and characterization of chitosan-coated titanate nanotubes: towards a new safe nanocarrier. Dalton Trans 2017; 46:15386-15398. [DOI: 10.1039/c7dt03029k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chitosan-coated titanate nanotubes as promising new nanocarriers: two different approaches, two different behaviors.
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Affiliation(s)
- Fadoua Sallem
- Université de Tunis El Manar
- Faculté des Sciences de Tunis
- UR11ES18 Chimie Minérale Appliquée
- Tunis
- Tunisia
| | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS Université Bourgogne Franche-Comté
- 21078 Dijon
- France
| | - Olivier Heintz
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS Université Bourgogne Franche-Comté
- 21078 Dijon
- France
| | - Isabelle Séverin
- Université Bourgogne Franche Comté
- AgroSupDijon
- NUTox INSERM
- UMR 1231
- 21000 Dijon
| | - Adel Megriche
- Université de Tunis El Manar
- Faculté des Sciences de Tunis
- UR11ES18 Chimie Minérale Appliquée
- Tunis
- Tunisia
| | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS Université Bourgogne Franche-Comté
- 21078 Dijon
- France
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19
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Electrospinning ofin situandex situsynthesized polyimide composites reinforced by titanate nanotubes. J Appl Polym Sci 2016. [DOI: 10.1002/app.44641] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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20
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Pavlovic M, Rouster P, Oncsik T, Szilagyi I. Tuning Colloidal Stability of Layered Double Hydroxides: From Monovalent Ions to Polyelectrolytes. Chempluschem 2016; 82:121-131. [DOI: 10.1002/cplu.201600295] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 07/18/2016] [Indexed: 02/03/2023]
Affiliation(s)
- Marko Pavlovic
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Paul Rouster
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Tamas Oncsik
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
| | - Istvan Szilagyi
- Department of Inorganic and Analytical Chemistry; University of Geneva; 30 Quai Ernest-Ansermet 1205 Geneva Switzerland
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21
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Effect of miR-146a/bFGF/PEG-PEI Nanoparticles on Inflammation Response and Tissue Regeneration of Human Dental Pulp Cells. BIOMED RESEARCH INTERNATIONAL 2016; 2016:3892685. [PMID: 27057540 PMCID: PMC4745861 DOI: 10.1155/2016/3892685] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 12/30/2015] [Indexed: 11/18/2022]
Abstract
Introduction. Inflammation in dental pulp cells (DPCs) initiated by Lipopolysaccharide (LPS) results in dental pulp necrosis. So far, whether there is a common system regulating inflammation response and tissue regeneration remains unknown. miR-146a is closely related to inflammation. Basic fibroblast growth factor (bFGF) is an important regulator for differentiation. Methods. To explore the effect of miR-146a/bFGF on inflammation and tissue regeneration, polyethylene glycol-polyethyleneimine (PEG-PEI) was synthesized, and physical characteristics were analyzed by dynamic light scattering and gel retardation analysis. Cell absorption, transfection efficiency, and cytotoxicity were assessed. Alginate gel was combined with miR-146a/PEG-PEI nanoparticles and bFGF. Drug release ratio was measured by ultraviolet spectrophotography. Proliferation and odontogenic differentiation of DPCs with 1 μg/mL LPS treatment were determined. Results. PEG-PEI prepared at N/P 2 showed complete gel retardation and smallest particle size and zeta potential. Transfection efficiency of PEG-PEI was higher than lipo2000. Cell viability decreased as N/P ratio increased. Drug release rate amounted to 70% at the first 12 h and then maintained slow release afterwards. Proliferation and differentiation decreased in DPCs with LPS treatment, whereas they increased in miR-146a/bFGF gel group. Conclusions. PEG-PEI is a promising vector for gene therapy. miR-146a and bFGF play critical roles in inflammation response and tissue regeneration of DPCs.
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Pavlovic M, Li L, Dits F, Gu Z, Adok-Sipiczki M, Szilagyi I. Aggregation of layered double hydroxide nanoparticles in the presence of heparin: towards highly stable delivery systems. RSC Adv 2016. [DOI: 10.1039/c5ra26072h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Heparin coating significantly enhanced the colloidal stability of layered double hydroxide nanoparticles.
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Affiliation(s)
- Marko Pavlovic
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- Geneva
- Switzerland
| | - Li Li
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Francois Dits
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- Geneva
- Switzerland
| | - Zi Gu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Monika Adok-Sipiczki
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- Geneva
- Switzerland
| | - Istvan Szilagyi
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- Geneva
- Switzerland
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23
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Rouster P, Pavlovic M, Szilagyi I. Improving the stability of titania nanosheets by functionalization with polyelectrolytes. RSC Adv 2016. [DOI: 10.1039/c6ra23707j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Highly stable suspensions of titanate nanosheets were designed by surface functionalization with P(AAm-co-DADMAC) copolymer.
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Affiliation(s)
- Paul Rouster
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- CH-1205 Geneva
- Switzerland
| | - Marko Pavlovic
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- CH-1205 Geneva
- Switzerland
| | - Istvan Szilagyi
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- CH-1205 Geneva
- Switzerland
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