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Delledonne A, Guazzelli E, Pescina S, Bianchera A, Galli G, Martinelli E, Sissa C. Amphiphilic Fluorinated Unimer Micelles as Nanocarriers of Fluorescent Probes for Bioimaging. ACS APPLIED NANO MATERIALS 2023; 6:15551-15562. [PMID: 37706068 PMCID: PMC10496108 DOI: 10.1021/acsanm.3c02300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/07/2023] [Indexed: 09/15/2023]
Abstract
The unique self-assembly properties of unimer micelles are exploited for the preparation of fluorescent nanocarriers embedding hydrophobic fluorophores. Unimer micelles are constituted by a (meth)acrylate copolymer with oligoethyleneglycol and perflurohexylethyl side chains (PEGMA90-co-FA10) in which the hydrophilic and hydrophobic comonomers are statistically distributed along the polymeric backbone. Thanks to hydrophobic interactions in water, the amphiphilic copolymer forms small nanoparticles (<10 nm), with tunable properties and functionality. An easy procedure for the encapsulation of a small hydrophobic molecule (C153 fluorophore) within unimer micelles is presented. UV-vis, fluorescence, and fluorescence anisotropy spectroscopic experimental data demonstrate that the fluorophore is effectively embedded in the nanocarriers. Moreover, the nanocarrier positively contributes to preserve the good emissive properties of the fluorophore in water. The efficacy of the dye-loaded nanocarrier as a fluorescent probe is tested in two-photon imaging of thick ex vivo porcine scleral tissue.
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Affiliation(s)
- Andrea Delledonne
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Elisa Guazzelli
- Dipartimento
di Chimica e Chimica Industriale, Università
di Pisa, 56124 Pisa, Italy
| | - Silvia Pescina
- ADDRes
Lab, Dipartimento di Scienze degli Alimenti e del Farmaco, Università di Parma, Parco Area delle Scienze 27A, 43124 Parma, Italy
| | - Annalisa Bianchera
- ADDRes
Lab, Dipartimento di Scienze degli Alimenti e del Farmaco, Università di Parma, Parco Area delle Scienze 27A, 43124 Parma, Italy
| | - Giancarlo Galli
- Dipartimento
di Chimica e Chimica Industriale, Università
di Pisa, 56124 Pisa, Italy
| | - Elisa Martinelli
- Dipartimento
di Chimica e Chimica Industriale, Università
di Pisa, 56124 Pisa, Italy
- Centro
per la Integrazione Della Strumentazione Dell’Università
di Pisa (CISUP), Lungarno
Pacinotti 43/44, 56126 Pisa, Italy
| | - Cristina Sissa
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
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Jouad K, Eliseeva SV, Collet G, Colas C, Da Silva D, Hiebel MA, El Brahmi N, Akssira M, Petoud S, El Kazzouli S, Suzenet F. Near-Infrared Emitting Poly(amidoamine) Dendrimers with an Anthraquinone Core toward Versatile Non-Invasive Biological Imaging. Biomacromolecules 2022; 23:1392-1402. [PMID: 35235298 DOI: 10.1021/acs.biomac.1c01604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Today, there is a very strong demand for versatile near-infrared (NIR) imaging agents suitable for non-invasive optical imaging in living organisms (in vivo imaging). Here, we created a family of NIR-emitting macromolecules that take advantage of the unique structure of dendrimers. In contrast to existing fluorescent dendrimers bearing fluorophores at their periphery or in their cavities, a NIR fluorescent structure is incorporated into the core of the dendrimer. Using the poly(amidoamine) dendrimer structure, we want to promote the biocompatibility of the NIR-emissive system and to have functional groups available at the periphery to obtain specific biological functionalities such as the ability to deliver drugs or for targeting a biological location. We report here the divergent synthesis and characterization by NMR and mass spectrometries of poly(amidoamine) dendrimers derived from the fluorescent NIR-emitting anthraquinone core (AQ-PAMAF). AQ-PAMAFs ranging from the generation -0.5 up to 3 were synthesized with a good level of control resulting in homogeneous and complete dendrimers. Absorption, excitation, and emission spectra, as well as quantum yields, of AQ-PAMAFs have been determined in aqueous solutions and compared with the corresponding properties of the AQ-core. It has been demonstrated that the absorption bands of AQ-PAMAFs range from UV to 750 nm while emission is observed in the range of 650-950 nm. Fluorescence macroscopy experiments confirmed that the NIR signal of AQ-PAMAFs can be detected with a satisfactory signal-to-noise ratio in aqueous solution, in blood, and through 1 mm thick tissue-mimicking phantom. The results show that our approach is highly promising for the design of an unprecedented generation of versatile NIR-emitting agents.
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Affiliation(s)
- Kamal Jouad
- Institut de Chimie Organique et Analytique UMR 7311, Université d'Orléans Rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France.,Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, 30000 Fez, Morocco
| | - Svetlana V Eliseeva
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, 45071 Orléans Cedex 2, France
| | - Guillaume Collet
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, 45071 Orléans Cedex 2, France.,Le Studium Loire Valley Institute for Advanced Studies, 45000 Orléans & Tours, France
| | - Cyril Colas
- Institut de Chimie Organique et Analytique UMR 7311, Université d'Orléans Rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France.,Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, 45071 Orléans Cedex 2, France
| | - David Da Silva
- Institut de Chimie Organique et Analytique UMR 7311, Université d'Orléans Rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France
| | - Marie-Aude Hiebel
- Institut de Chimie Organique et Analytique UMR 7311, Université d'Orléans Rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France
| | - Nabil El Brahmi
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, 30000 Fez, Morocco
| | - Mohamed Akssira
- Faculty of Sciences and Technologies of Mohammedia, URAC 22 FSTM, University Hassan II, BP 146, 28800 Mohammedia, Morocco
| | - Stéphane Petoud
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, 45071 Orléans Cedex 2, France
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, 30000 Fez, Morocco
| | - Franck Suzenet
- Institut de Chimie Organique et Analytique UMR 7311, Université d'Orléans Rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France
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Mishra K, Acharjee D, Das A, Ghosh S. Femtosecond Upconversion Study of Interfacial Electron Transfer from Photoexcited CsPbBr 3 Perovskite Nanocrystal to Rhodamine 6G. J Phys Chem B 2021; 125:11017-11025. [PMID: 34583511 DOI: 10.1021/acs.jpcb.1c05354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photoinduced electron transfer (PET) from an excited-state CsPbBr3 nanocrystal (NC) to rhodamine 6G (r6G) is studied in toluene using different fluorescence-based techniques. Because of weak solubility of r6G in toluene, excess r6G molecules adsorb at NC surface which result in a much slower rotational diffusion time scale of r6G in the presence of NCs. Study of intrinsic PET benefits from the soft molecular interactions leading to donor (NC)-acceptor (r6G) complex formation, where solvent diffusion parameters would not play any role in the PET kinetics. Femtosecond transients of NCs are nicely fit to a Poisson expression originally proposed by Tachiya. Conclusive fittings to the temperature dependence quenching data reveal two interesting observations: (1) Even though the average number of surface trap state in a NC does not change with temperature (5-60 °C), the trap-state-induced quenching time scale is accelerated with increase in temperature, pointing toward a more efficient trapping at higher temperature. (ii) In the presence of r6G, a fast (∼150 ps per r6G molecule) interfacial PET time scale is observed, which remains unaffected by temperature (5-60 °C). Our findings demonstrate that even a simple "perovskite NC-electron acceptor" composite like that in the present study can ensure a rapid interfacial charge separation. Such information will help us to realize the actual potential of perovskites NCs in their real applications.
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Affiliation(s)
- Krishna Mishra
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Ayendrila Das
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Jatni, Khurda, Odisha 752050, India
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Abstract
The development of molecular nanostructures with well-defined particle size and shape is of eminent interest in biomedicine. Among many studied nanostructures, dendrimers represent the group of those most thoroughly characterized ones. Due to their unique structure and properties, dendrimers are very attractive for medical and pharmaceutical applications. Owing to the controllable cavities inside the dendrimer, guest molecules may be encapsulated, and highly reactive terminal groups are susceptible to further modifications, e.g., to facilitate target delivery. To understand the potential of these nanoparticles and to predict and avoid any adverse cellular reactions, it is necessary to know the mechanisms responsible for an efficient dendrimer uptake and the destination of their intracellular journey. In this article, we summarize the results of studies describing the dendrimer uptake, traffic, and efflux mechanisms depending on features of specific nanoparticles and cell types. We also present mechanisms of dendrimers responsible for toxicity and alteration in signal transduction pathways at the cellular level.
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Affiliation(s)
- Barbara Ziemba
- Department of Clinical and Laboratory Genetics, Medical University of Lodz, Lodz, Poland
| | - Maciej Borowiec
- Department of Clinical and Laboratory Genetics, Medical University of Lodz, Lodz, Poland
| | - Ida Franiak-Pietryga
- Department of Clinical and Laboratory Genetics, Medical University of Lodz, Lodz, Poland.,Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
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Evaluation of the interaction of a guanylhydrazone derivative with cobalt ferrite nanoparticles and PAMAM electrochemical and UV/visible spectroscopic techniques. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04848-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Koley S, Panda MR, Bharadwaj K, Ghosh S. Spectroscopic and Calorimetric Studies of Molecular Recognitions in a Dendrimer-Surfactant Complex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:817-825. [PMID: 28505448 DOI: 10.1021/acs.langmuir.7b01081] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Molecular recognitions, causing supramolecular complex formation between a hyperbranched polymer molecule (polyamidoamine (PAMAM) dendrimer generation 3) with oppositely charged surfactant sodium dodecyl sulfate (SDS) in aqueous solution, were studied by using various spectroscopic techniques and calorimetric titration of heat change measurements. Spectroscopic measurements were performed using dynamic Stokes shift (DSS), rotational anisotropy decay, and translational diffusion of a fluorescent probe molecule coumarin 153 (C153) noncovalently attached to the dendrimer-surfactant complex. All these studies unanimously confirm that the critical aggregation concentration (CAC) of SDS falls to ∼0.8 mM (from its critical micelle concentration (CMC) ∼ 8 mM) in the presence of ∼0.2 mM dendrimer. Further studies of isothermal titration calorimetry (ITC) measurement show that the CAC of SDS in the presence of dendrimer remains invariant to the dendrimer concentration. Complexation reaction between SDS and dendrimer is highly exothermic in nature. A maximum heat release (ΔH∼ -6.6 kJ/mol of SDS binding) was observed at a SDS-to-dendrimer mole ratio of ∼3-5; where up to 3 to 5 SDS molecules were encapsulated by one dendrimer molecule to form dendrimer-SDS encapsulation complex. When negatively charged SDS was replaced with a positively charged surfactant dodecyl-trimethylammonium-bromide (DTAB), we found that the DTAB hardly interacted with positively charged dendrimer due to the charge-charge repulsions.
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Affiliation(s)
- Somnath Koley
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| | - Manas Ranjan Panda
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| | - Kiran Bharadwaj
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
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