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Soenen SJ, Velde GV, Ketkar-Atre A, Himmelreich U, De Cuyper M. Magnetoliposomes as magnetic resonance imaging contrast agents. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 3:197-211. [PMID: 25363747 DOI: 10.1002/wnan.122] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Among the wide variety in iron oxide nanoparticles which are routinely used as magnetic resonance imaging (MRI) contrast agents, magnetoliposomes (MLs) take up a special place. In the present work, the two main types (large and small MLs) are defined and their specific features are commented. For both types of MLs, the flexibility of the lipid coating allows for efficient functionalization, enabling bimodal imaging (e.g., MRI and fluorescence) or the use of MLs as theranostics. These features are especially true for large MLs, where several magnetite cores are encapsulated within a single large liposome, which were found to be highly efficient theranostic agents. By carefully fine-tuning the number of magnetite cores and attaching Gd(3+) -complexes onto the liposomal surface, the large MLs can be efficiently optimized for dynamic MRI. A special type of MLs, biogenic MLs, can also be efficiently used in this regard, with potential applications in cancer treatment and imaging. Small MLs, where the lipid bilayer is immediately attached onto a solid magnetite core, give a very high r2 /r1 ratio. The flexibility of the lipid bilayer allows the incorporation of poly(ethylene glycol)-lipid conjugates to increase blood circulation times and be used as bone marrow contrast agents. Cationic lipids can also be incorporated, leading to high cell uptake and associated strong contrast generation in MRI of implanted cells. Unique for these small MLs is the high resistance the particles exhibit against intracellular degradation compared with dextran- or citrate-coated particles. Additionally, intracellular clustering of the iron oxide cores enhances negative contrast generation and enables longer tracking of labeled cells in time.
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Affiliation(s)
- Stefaan J Soenen
- Lab of BioNanoColloids, KULeuven Campus Kortrijk, IRC Etienne Sabbelaan, Kortrijk, Belgium
| | - Greetje Vande Velde
- Biomedical NMR Unit/MoSAIC, KULeuven Campus Gasthuisberg, University Medical Hospital Gasthuisberg, Leuven, Belgium
| | - Ashwini Ketkar-Atre
- Biomedical NMR Unit/MoSAIC, KULeuven Campus Gasthuisberg, University Medical Hospital Gasthuisberg, Leuven, Belgium
| | - Uwe Himmelreich
- Biomedical NMR Unit/MoSAIC, KULeuven Campus Gasthuisberg, University Medical Hospital Gasthuisberg, Leuven, Belgium
| | - Marcel De Cuyper
- Lab of BioNanoColloids, KULeuven Campus Kortrijk, IRC Etienne Sabbelaan, Kortrijk, Belgium
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Hodenius M, Schmitz-Rode T, Baumann M, Ivanova G, Wong J, Mang T, Haulena F, Soenen S, De Cuyper M. Absorption of 10-hydroxycamptothecin into the coat of magnetoliposomes. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.01.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lozano N, Pinazo A, La Mesa C, Perez L, Andreozzi P, Pons R. Catanionic Vesicles Formed with Arginine-Based Surfactants and 1,2-Dipalmitoyl-sn-glycero-3-phosphate Monosodium Salt. J Phys Chem B 2009; 113:6321-7. [DOI: 10.1021/jp810671p] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Neus Lozano
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya (IQAC), CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain, and Dipartimento di Chimica, Università degli Studi “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Aurora Pinazo
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya (IQAC), CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain, and Dipartimento di Chimica, Università degli Studi “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Camillo La Mesa
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya (IQAC), CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain, and Dipartimento di Chimica, Università degli Studi “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Lourdes Perez
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya (IQAC), CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain, and Dipartimento di Chimica, Università degli Studi “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Patrizia Andreozzi
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya (IQAC), CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain, and Dipartimento di Chimica, Università degli Studi “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Ramon Pons
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya (IQAC), CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain, and Dipartimento di Chimica, Università degli Studi “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Rome, Italy
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Saveyn P, Cocquyt J, De Cuyper M, Van der Meeren P. Evaluation of the interaction of propranolol with 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) liposomes: the Langmuir model. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:6007-6012. [PMID: 18471000 DOI: 10.1021/la800025y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The interaction of the amine containing beta-receptor blocking agent propranolol (Ppn) with dimyristoylphosphatidylcholine (DMPC) vesicles was studied. Using a centrifugation assay, the protonated as well as unprotonated amount of the drug sorbed was verified, whereas the binding of the protonated Ppn was deduced from the surface charge density of the vesicles as calculated from electrophoretic mobility measurements. Assuming a 1:1 binding, a Langmuir model with only two parameters was found to be sufficient to fit all experimental data. Sensitivity analysis revealed that the estimated values of these parameters were reliable and independent from each other. These parameters were truly intrinsic, as electrostatic interactions were accounted for in the model. It was found that the pKa of Ppn shifted from 9.24, when dissolved in water, downward by 1.34 units upon sorption, indicating that the intrinsic partition coefficient of the unprotonated Ppn was about 22 times higher than that of the protonated analog. In addition, a significant increase in the affinity of both Ppn analogs with increasing salt concentration was found. Theoretical analysis revealed that the Langmuir sorption model may be considered as a partitioning model with decreasing partition coefficient as the sorbed amount increases. Thus, the Langmuir model provides a better fit than a simple partition model at conditions that induce a substantial amount of propranolol sorbed, such as high pH and high propranolol concentrations.
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Affiliation(s)
- Pieter Saveyn
- Particle and Interfacial Technology Group, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Gent, Belgium
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Cocquyt J, Soenen SJH, Saveyn P, Van der Meeren P, De Cuyper M. Partitioning of propranolol in the phospholipid bilayer coat of anionic magnetoliposomes. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:204102. [PMID: 21694232 DOI: 10.1088/0953-8984/20/20/204102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This work deals with the partitioning of the cationic amphiphilic drug, propranolol, in the coating of so-called magnetoliposomes (MLs), which consist of nanometre-sized, magnetizable iron oxide cores covered with a phospholipid bilayer. MLs of two types were used: either the ML coat consisted entirely of anionic dimyristoylphosphatidylglycerol, or it was mixed with zwitterionic dimyristoylphosphatidylcholine in a 5/95 molar ratio. To separate sorbed from non-sorbed propranolol, high-gradient magnetophoresis was used. The sorption profiles clearly show that electrostatic interactions play a key role in the sorption process as drug incorporation in the ML coat was favoured by increasing the anionic character of the ML envelope and by reducing the salt concentration of the medium. Also, upon drug binding some phospholipid molecules were expelled from the ML coat. The observations may be of relevance in the biomedical field, i.e. in the development of ML-based, intracellular theranostics.
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Affiliation(s)
- J Cocquyt
- Particle and Interfacial Technology Group, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Saveyn P, Cocquyt E, Sinnaeve D, Martins JC, Topgaard D, Meeren PVD. NMR study of the sorption behavior of benzyl alcohol derivatives into sonicated and extruded dioctadecyldimethylammonium chloride (DODAC) dispersions: the relevance of membrane fluidity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:3082-3089. [PMID: 18312006 DOI: 10.1021/la703285b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The sorption behavior of three benzyl alcohol derivatives with different hydrophobicities into sonicated and extruded DODAC dispersions has been studied using NMR spectroscopy and NMR diffusometry. We show that there is an increased sorption into a sonicated dispersion below the phase-transition temperature (T(m)) as compared to an extruded dispersion. This may be explained by the incomplete lipid chain freezing of charged lipids as a result of the sonication process. Around T(m), a sorption maximum is found that is attributed to the high bilayer disorder under this condition. In addition, a sorption increase and a fluidizing effect at increasing benzyl alcohol derivative concentrations are observed that provide additional evidence for the relevance of the bilayer fluidity on the sorption of hydrophobic components.
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Affiliation(s)
- Pieter Saveyn
- Particle and Interfacial Technology Group, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Gent, Belgium.
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Soenen SJH, Baert J, De Cuyper M. Optimal Conditions for Labelling of 3T3 Fibroblasts with Magnetoliposomes without Affecting Cellular Viability. Chembiochem 2007; 8:2067-77. [DOI: 10.1002/cbic.200700327] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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