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Ghezzi M, Pescina S, Padula C, Santi P, Del Favero E, Cantù L, Nicoli S. Polymeric micelles in drug delivery: An insight of the techniques for their characterization and assessment in biorelevant conditions. J Control Release 2021; 332:312-336. [PMID: 33652113 DOI: 10.1016/j.jconrel.2021.02.031] [Citation(s) in RCA: 374] [Impact Index Per Article: 124.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/16/2022]
Abstract
Polymeric micelles, i.e. aggregation colloids formed in solution by self-assembling of amphiphilic polymers, represent an innovative tool to overcome several issues related to drug administration, from the low water-solubility to the poor drug permeability across biological barriers. With respect to other nanocarriers, polymeric micelles generally display smaller size, easier preparation and sterilization processes, and good solubilization properties, unfortunately associated with a lower stability in biological fluids and a more complicated characterization. Particularly challenging is the study of their interaction with the biological environment, essential to predict the real in vivo behavior after administration. In this review, after a general presentation on micelles features and properties, different characterization techniques are discussed, from the ones used for the determination of micelles basic characteristics (critical micellar concentration, size, surface charge, morphology) to the more complex approaches used to figure out micelles kinetic stability, drug release and behavior in the presence of biological substrates (fluids, cells and tissues). The techniques presented (such as dynamic light scattering, AFM, cryo-TEM, X-ray scattering, FRET, symmetrical flow field-flow fractionation (AF4) and density ultracentrifugation), each one with their own advantages and limitations, can be combined to achieve a deeper comprehension of polymeric micelles in vivo behavior. The set-up and validation of adequate methods for micelles description represent the essential starting point for their development and clinical success.
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Affiliation(s)
- M Ghezzi
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - S Pescina
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - C Padula
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - P Santi
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - E Del Favero
- Department of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Segrate, Italy
| | - L Cantù
- Department of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Segrate, Italy
| | - S Nicoli
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy.
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Montaudo MS, Puglisi C, Battiato S, Zappia S, Destri S, Samperi F. An innovative approach for the chemical structural characterization of poly(styrene 4-vinylpyridine) copolymers by matrix-assisted laser desorption/ionization time of flight mass spectrometry. J Appl Polym Sci 2018. [DOI: 10.1002/app.46976] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- M. S. Montaudo
- Istituto per i Polimeri; Compositi e Biomateriali (IPCB) Sede Secondaria di Catania, CNR; Via Gaifami 18, 95126 Catania Italy
| | - C. Puglisi
- Istituto per i Polimeri; Compositi e Biomateriali (IPCB) Sede Secondaria di Catania, CNR; Via Gaifami 18, 95126 Catania Italy
| | - S. Battiato
- Istituto per i Polimeri; Compositi e Biomateriali (IPCB) Sede Secondaria di Catania, CNR; Via Gaifami 18, 95126 Catania Italy
| | - S. Zappia
- Istituto per lo Studio delle Macromolecole (ISMAC), CNR; Via A. Corti 12, 20133 Milan Italy
| | - S. Destri
- Istituto per lo Studio delle Macromolecole (ISMAC), CNR; Via A. Corti 12, 20133 Milan Italy
| | - F. Samperi
- Istituto per i Polimeri; Compositi e Biomateriali (IPCB) Sede Secondaria di Catania, CNR; Via Gaifami 18, 95126 Catania Italy
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Till U, Gibot L, Mingotaud AF, Ehrhart J, Wasungu L, Mingotaud C, Souchard JP, Poinso A, Rols MP, Violleau F, Vicendo P. Drug Release by Direct Jump from Poly(ethylene-glycol-b-ε-caprolactone) Nano-Vector to Cell Membrane. Molecules 2016; 21:E1643. [PMID: 27916905 PMCID: PMC6273951 DOI: 10.3390/molecules21121643] [Citation(s) in RCA: 8] [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: 10/24/2016] [Revised: 11/15/2016] [Accepted: 11/18/2016] [Indexed: 01/07/2023] Open
Abstract
Drug delivery by nanovectors involves numerous processes, one of the most important being its release from the carrier. This point still remains unclear. The current work focuses on this point using poly(ethyleneglycol-b-ε-caprolactone) micelles containing either pheophorbide-a (Pheo-a) as a fluorescent probe and a phototoxic agent or fluorescent copolymers. This study showed that the cellular uptake and the phototoxicity of loaded Pheo-a are ten times higher than those of the free drug and revealed a very low cellular penetration of the fluorescence-labeled micelles. Neither loaded nor free Pheo-a displayed the same cellular localization as the labeled micelles. These results imply that the drug entered the cells without its carrier and probably without a disruption, as suggested by their stability in cell culture medium. These data allowed us to propose that Pheo-a directly migrates from the micelle to the cell without disruption of the vector. This mechanism will be discussed.
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Affiliation(s)
- Ugo Till
- Université de Toulouse, UPS/CNRS, IMRCP, 118 Rte de Narbonne, 31062 Toulouse, France.
| | - Laure Gibot
- Université de Toulouse, Equipe de Biophysique Cellulaire, IPBS-CNRS UMR5089 205, Route de Narbonne BP 64182, 31077 Toulouse, France.
| | | | - Jérôme Ehrhart
- Université de Toulouse, UPS/CNRS, IMRCP, 118 Rte de Narbonne, 31062 Toulouse, France.
| | - Luc Wasungu
- Université de Toulouse, Equipe de Biophysique Cellulaire, IPBS-CNRS UMR5089 205, Route de Narbonne BP 64182, 31077 Toulouse, France.
| | - Christophe Mingotaud
- Université de Toulouse, UPS/CNRS, IMRCP, 118 Rte de Narbonne, 31062 Toulouse, France.
| | - Jean-Pierre Souchard
- Université de Toulouse, UPS/CNRS, IMRCP, 118 Rte de Narbonne, 31062 Toulouse, France.
| | - Alix Poinso
- Université de Toulouse, UPS/CNRS, IMRCP, 118 Rte de Narbonne, 31062 Toulouse, France.
| | - Marie-Pierre Rols
- Université de Toulouse, Equipe de Biophysique Cellulaire, IPBS-CNRS UMR5089 205, Route de Narbonne BP 64182, 31077 Toulouse, France.
| | - Frédéric Violleau
- Université de Toulouse, Laboratoire de Chimie Agro-industrielle (LCA), INRA, INPT, INP-EI PURPAN, 31076 Toulouse, France.
| | - Patricia Vicendo
- Université de Toulouse, UPS/CNRS, IMRCP, 118 Rte de Narbonne, 31062 Toulouse, France.
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Pyykkö I, Zou J, Zhang Y, Zhang W, Feng H, Kinnunen P. Nanoparticle based inner ear therapy. World J Otorhinolaryngol 2013; 3:114-133. [DOI: 10.5319/wjo.v3.i4.114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Revised: 08/22/2013] [Accepted: 10/18/2013] [Indexed: 02/06/2023] Open
Abstract
Synthetic nanoparticles can be used to carry drugs, genes, small interfering RNA (siRNA) and growth factors into the inner ear, to repair, restore and induce cellular regeneration. Nanoparticles (NPs) have been developed which are targetable to selected tissue, traceable in vivo, and equipped with controlled drug/gene release. The NPs are coated with a ‘stealth’ layer, and decorated with targeting ligands, markers, transfection agents and endosomal escape peptides. As payloads, genes such as the BDNF-gene, Math1-gene and Prestin-gene have been constructed and delivered in vitro. Short-hairpin RNA has been used in vitro to silence the negative regulator of Math1, the inhibitors of differentiation and DNA binding. In order to facilitate the passage of cargo from the middle ear to the inner ear, the oval window transports gadolinium chelate more efficiently than the round window and is the key element in introducing therapeutic agents into the vestibule and cochlea. Depending upon the type of NPs, different migration and cellular internalization pathways are employed, and optimal carriers should be designed depending on the cargo. The use of NPs as drug/gene/siRNA carriers is fascinating and can also be used as an intraoperative adjunct to cochlear implantation to attract the peripheral processes of the cochlear nerve.
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Neibert KD, Maysinger D. Mechanisms of cellular adaptation to quantum dots--the role of glutathione and transcription factor EB. Nanotoxicology 2011; 6:249-62. [PMID: 21495880 DOI: 10.3109/17435390.2011.572195] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cellular adaptation is the dynamic response of a cell to adverse changes in its intra/extra cellular environment. The aims of this study were to investigate the role of: (i) the glutathione antioxidant system, and (ii) the transcription factor EB (TFEB), a newly revealed master regulator of lysosome biogenesis, in cellular adaptation to nanoparticle-induced oxidative stress. Intracellular concentrations of glutathione species and activation of TFEB were assessed in rat pheochromocytoma (PC12) cells following treatment with uncapped CdTe quantum dots (QDs), using biochemical, live cell fluorescence and immunocytochemical techniques. Exposure to toxic concentrations of QDs resulted in a significant enhancement of intracellular glutathione concentrations, redistribution of glutathione species and a progressive translocation and activation of TFEB. These changes were associated with an enlargement of the cellular lysosomal compartment. Together, these processes appear to have an adaptive character, and thereby participate in the adaptive cellular response to toxic nanoparticles.
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Affiliation(s)
- Kevin D Neibert
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Québec, Canada
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Ding Y, Chen Q, Qian H, Chen Y, Wu W, Hu Y, Jiang X. Gold encapsulated chitosan-poly(acrylic acid) hybrid hollow nanospheres. Macromol Biosci 2010; 9:1272-80. [PMID: 19924682 DOI: 10.1002/mabi.200900245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Chitosan-poly(acrylic acid)-gold (CS-PAA-Au) hybrid hollow nanospheres were prepared by reducing gold salts to gold nanoparticles in chitosan-acrylic acid (CS-AA) aqueous solution, followed by polymerization of AA monomer and selectively crosslinking chitosan at the end of polymerization. The payload of Au nanoparticles within the CS-PAA hollow nanospheres could be controlled by varying the addition amount of gold salts in the reaction system. Transmission electron microscopy (TEM) revealed that multi-crystal gold nanoparticles were encapsulated inside the CS-PAA nanospheres. TEM and scanning electron microscopy (SEM) indicated that these hybrid nanospheres had a hollow structure. Energy-dispersive X-ray (EDX) spectroscopy confirmed the existence of gold nanoparticles inside the CS-PAA-Au hybrid nanospheres. These hollow CS-PAA-Au hybrid nanospheres showed a typical surface plasmon resonance (SPR) band of gold nanoparticles around 526 nm, and offered excellent stability at different temperatures and in acidic media. Also, no inhibition of cell proliferation and no cytotoxic effects were observed in the presence of CS-PAA-Au hybrid nanospheres, which renders them good candidates for potential application in biomedical fields.
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Affiliation(s)
- Yin Ding
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
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Han H, Lee J, Hong J, Shim SE. Dispersion polymerization of styrene employing lyophilic comonomer in the absence of stabilizer: Synthesis of impurity-free microspheres. Macromol Res 2009. [DOI: 10.1007/bf03218894] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Han H, Hong CK, Hong J, Park DW, Shim SE. Synthesis of poly(styrene-co-4-vinylpyridine) microspheres via dispersion polymerization: Effect of the concentration of 4-vinylpyridine. J Appl Polym Sci 2009. [DOI: 10.1002/app.29298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ren Y, Jiang X, Yin J. Copolymer of poly(4-vinylpyridine)-g-poly(ethylene oxide) respond sharply to temperature, pH and ionic strength. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.09.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Noonan KJT, Gillon BH, Cappello V, Gates DP. Phosphorus-Containing Block Copolymer Templates Can Control the Size and Shape of Gold Nanostructures. J Am Chem Soc 2008; 130:12876-7. [DOI: 10.1021/ja805076y] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin J. T. Noonan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1
| | - Bronwyn H. Gillon
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1
| | - Vittorio Cappello
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1
| | - Derek P. Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1
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Azzam T, Bronstein L, Eisenberg A. Water-soluble surface-anchored gold and palladium nanoparticles stabilized by exchange of low molecular weight ligands with biamphiphilic triblock copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:6521-6529. [PMID: 18484759 DOI: 10.1021/la703719f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A study is presented of the stabilization of gold and palladium nanoparticles (NPs) via a place-exchange reaction. Au and Pd NPs of approximately 3.5 nm were prepared by a conventional method using tetraoctylammonium bromide (TOAB) as the stabilizing agent. The resulting nanoparticles, referred to as Au-TOAB or Pd-TOAB, were later used as templates for the replacement of TOAB ligand with poly(ethylene oxide)- b-polystyrene- b-poly(4-vinylpyridine) (PEO- b-PS- b-P4VP) triblock copolymer. This biamphiphilic triblock copolymer was synthesized by atom transfer radical polymerization (ATRP) with control over the molecular weight and polydispersity. The place-exchange reaction was mediated through strong coordination forces between the 4-vinylpyridine copolymer and the metal species located on the surface of the nanoparticles. In addition, the displacement of the outgoing low molecular weight TOAB ligands by high molecular weight polymers is an entropy-assisted process and is believed to contribute to stabilization. The prepared complex, polymer-NP, exhibits greatly improved stability over the metal-NP complex in common organic solvents for the triblock copolymer. Self-assembly in water after ligand exchange resulted in micellar structures of about approximately 20 nm (electron microscopy) with the metal NP found located on the surface of the micelles. The stability of the nanoparticles in water was shown to depend greatly on the grafting density of the copolymer, with high stability (more than 6 months) at high grafting density and low stability, accompanied with irreversible agglomeration, at relatively low grafting densities. The surprising location of the metal NP (for both Au and Pd) on the surface of the micelles in water is explained by the fact that, upon self-assembly in THF/water system, the most hydrophobic chains (i.e., PS) undergo self-assembly first at low water content forming the core, followed by the P4VP (whether or not associated with the metal) forming a shell, and finally the PEO forming the corona. In lower metal content assemblies, the P4VP chains located in the shell undergo swelling in an acidic medium causing a substantial increase in micellar corona size, as confirmed by dynamic light scattering measurements. The present study offers a simple approach for the stabilization of various metal nanoparticles of catalytic interest, using a unique polymeric support that can be dispersed in organic solvents as well as aqueous solutions.
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Affiliation(s)
- Tony Azzam
- Department of Chemistry and Centre for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
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Jeon HJ, Go DH, Choi SY, Kim KM, Lee JY, Choo DJ, Yoo HO, Kim JM, Kim J. Synthesis of poly(ethylene oxide)-based thermoresponsive block copolymers by RAFT radical polymerization and their uses for preparation of gold nanoparticles. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.11.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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