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Lebreton V, Legeay S, Vasylaki A, Lagarce F, Saulnier P. Protein corona formation on lipidic nanocapsules: Influence of the interfacial PEG repartition. Eur J Pharm Sci 2023; 189:106537. [PMID: 37490974 DOI: 10.1016/j.ejps.2023.106537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/04/2023] [Accepted: 07/22/2023] [Indexed: 07/27/2023]
Abstract
The parameters currently used for characterization of nanoparticles, such as size and zeta potential, were not able to reflect the performance of a nanocarrier in the biological environment. Therefore, more thorough in vitro characterization is required to predict their behavior in vivo, where nanoparticles acquire a new biological identity due to interactions with biomolecules. In this present study, we performed in vitro characterization in biological fluids for lipid nanocapsules (LNCs) with varying means sizes (50 nm and 100 nm), different electrical surface charges and different Poly Ethylene Glycol (PEG) compositions. Then, different methods were applied to show the impact of the protein corona formation on LNCs. Even if all formulations attached to plasmatic proteins, a higher thickness of corona and highest protein binding was observed for certain LNC50 formulations. A better knowledge of the phenomenon of protein adsorption over NPs in the plasmatic media is a cornerstone of clinical translation. In fact, after short blood circulation time, it is not the initially designed nanoparticle but the complex nanoparticle bearing its protein corona which circulates to reach its target.
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Affiliation(s)
- Vincent Lebreton
- MINT, UNIV Angers, SFR-ICAT, INSERM U1066, CNRS 6021, Angers 4208, France; CHU Angers, Angers 49033, France.
| | - Samuel Legeay
- MINT, UNIV Angers, SFR-ICAT, INSERM U1066, CNRS 6021, Angers 4208, France
| | | | - Fredéric Lagarce
- MINT, UNIV Angers, SFR-ICAT, INSERM U1066, CNRS 6021, Angers 4208, France; CHU Angers, Angers 49033, France
| | - Patrick Saulnier
- MINT, UNIV Angers, SFR-ICAT, INSERM U1066, CNRS 6021, Angers 4208, France; CHU Angers, Angers 49033, France
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2
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Nwabuife JC, Hassan D, Madhaorao Pant A, Devnarain N, Gafar MA, Osman N, Rambharose S, Govender T. Novel vancomycin free base – Sterosomes for combating diseases caused by Staphylococcus aureus and Methicillin-resistant Staphylococcus aureus infections (S. Aureus and MRSA). J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2022.104089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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AbouSamra MM, Afifi SM, Galal AF, Kamel R. Rutin-loaded Phyto-Sterosomes as a potential approach for the treatment of hepatocellular carcinoma: In-vitro and in-vivo studies. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.104015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tea Tree Oil Nanoemulsion-Based Hydrogel Vehicle for Enhancing Topical Delivery of Neomycin. Life (Basel) 2022; 12:life12071011. [PMID: 35888099 PMCID: PMC9317510 DOI: 10.3390/life12071011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/03/2022] [Accepted: 07/05/2022] [Indexed: 12/14/2022] Open
Abstract
The present investigation aims to improve the antimicrobial influence of certain antibacterial drugs, namely, neomycin (NEO), exploiting the benefits of natural oils such as tea tree oil (TTO). Therefore, a distinctive nanolipid formulation, namely, a nanoemulsion (NE), was developed using a Central Composite Factorial Design (CCD) approach depending on the amount of TTO and tween 80 as surfactant. The optimized NEO-NE formula exhibiting minimum globular size and maximum in vitro release was selected. For efficient topical delivery, NEO-NE was incorporated into a pre-formulated hydrogel. The developed NEO-NE-hydrogel was characterized by its physical characteristics such as pH, viscosity, and spreadability. Next, it was tested for stability under different conditions for 3 months. Ultimately, an irritation test was conducted followed by an antibacterial examination. The preparation demonstrated acceptable properties to be successfully applied topically. It showed non-significant changes in stability in both conditions up to 3 months storage when compared to a fresh preparation. It exhibited no irritation when applied on hairless animal skin. Finally, TTO revealed a good inhibition for the bacterial growth that could improve the influence of NEO antibacterial activity, indicating the efficiency of NE containing NEO prepared with TTO to be a promising antibacterial nanocarrier.
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Eş I, Malfatti-Gasperini AA, de la Torre LG. The diffusion-driven microfluidic process to manufacture lipid-based nanotherapeutics with stealth properties for siRNA delivery. Colloids Surf B Biointerfaces 2022; 215:112476. [PMID: 35390597 DOI: 10.1016/j.colsurfb.2022.112476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/17/2022] [Accepted: 03/20/2022] [Indexed: 02/07/2023]
Abstract
Our study investigated the manufacturing of lipid-based nanotherapeutics with stealth properties for siRNA delivery by employing a diffusion-driven microfluidic process in one or two-steps strategies to produce siRNA-loaded lipid nanocarriers and lipoplexes, respectively. In the one-step synthesis, siRNA in the aqueous phase is introduced from one inlet, while phospholipids dispersed in anhydrous ethanol are introduced from other inlets, generating the lipid nanocarriers. In the two-steps strategies, the pre-formed liposomes are complexed with siRNA. The process configuration with an aqueous diffusion barrier exerts a significant effect on the nanoaggregates synthesis. Dynamic light scattering data showed that lipid nanocarriers had a bigger particle diameter (298 ± 24 nm) and surface charge (43 ± 6 mV) compared to lipoplexes (194 ± 7 nm and 37.0 ± 0.4 mV). Moreover, DSPE-PEG(2000) was included in the formulation to synthesize lipid-based nanotherapeutics containing siRNA with stealth characteristics. The inclusion of PEG-lipid resulted in an increase in the surface charge of lipoplexes (from 33.7 ± 4.4-54.3 ± 1.6 mV), while a significant decrease was observed in the surface charge of lipid nanocarriers (30.3 ± 8.7 mV). The different structural assemblies were identified for lipoplex and lipid nanocarriers using Synchrotron SAXS. Lipid nanocarriers present a lower amount of multilayers than lipoplexes. Lipid-PEG insertion significantly influenced lipid nanocarriers' characteristics, drastically decreasing the number of multilayers. This effect was not observed in lipoplexes. The association between process configuration, lipid composition, and its effect on the characteristics of lipid-based vector systems can generate fundamental insights, contributing to gene-based nanotherapeutics development.
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Affiliation(s)
- Ismail Eş
- Department of Material and Bioprocess Engineering, School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil; National Nanotechnology Research Center of Turkey (UNAM), Bilkent University, Ankara, Turkey
| | - Antonio A Malfatti-Gasperini
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, São Paulo, Brazil
| | - Lucimara Gaziola de la Torre
- Department of Material and Bioprocess Engineering, School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.
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Hypolipidemic Activity of Olive Oil-Based Nanostructured Lipid Carrier Containing Atorvastatin. NANOMATERIALS 2022; 12:nano12132160. [PMID: 35807995 PMCID: PMC9267979 DOI: 10.3390/nano12132160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/18/2022] [Accepted: 06/21/2022] [Indexed: 02/04/2023]
Abstract
Currently, hyperlipidemia is a growing health issue that is considered a risk factor for obesity. Controlling body weight and modifying life style in most of cases are not adequate and the condition requires medical treatment. Statin drugs (mainly Atorvastatin (ATO)), have been used broadly and for long time as medications for handling higher levels of lipid, especially bad cholesterol, which accordingly controls the prevalence of obesity. Still, the obstacle that stands in front of any formulation is the poor solubility of the drug. Low solubility of ATO came up with poor absorption as well as poor bioavailability. This paved the way for the present study, which aimed to exploit nanotechnology and develop certain nanolipid carriers that could accommodate hydrophobic drugs, such as ATO. Nanostructured lipid carrier (NLC) containing ATO was fabricated using olive oil. Olive oil is natural plant oil possessing confirmed hypolipidemic activity that would help in improving the efficacy of the formulation. Via applying the Quality by Design (QbD) approach, one NLC formula was selected to be optimized based on appropriate size and higher entrapment. Optimized ATO-NLC was scrutinized for zeta potential, in vitro study and kinetic profile. Moreover, stability testing and in vivo hypolipidemic behavior was conducted. The optimized NLC formulation seemed to show particle size (254.23 nm) with neutral zeta potential (−1.77 mV) and entrapment efficiency (69.56%). The formulation could be prolonged for 12 h and provided higher % of release (97.17%). Stability testing confirmed the role of modifying the surface of the formulation with PEG-DSPE in providing a highly stable formulation that could withstand three months storage in two altered conditions. Ultimately, optimized ATO-NLC could successfully lower total cholesterol level in rats induced with obesity and fed a high-fat diet. Remarkably, ATO-NLC prepared with olive oil, in addition to shielding its surface, would provide a stable formulation that holds up the synergistic action between olive oil and ATO.
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Tang L, He S, Yin Y, Li J, Xiao Q, Wang R, Gao L, Wang W. Combining nanotechnology with the multifunctional roles of neutrophils against cancer and inflammatory disease. NANOSCALE 2022; 14:1621-1645. [PMID: 35079756 DOI: 10.1039/d1nr07725b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Neutrophils, the most abundant leukocytes in humans, play a crucial role in acute inflammation during infection and tumorigenesis. Neutrophils are the major types of cells recruited to the inflammation sites induced by pathogens, exhibiting great homing ability towards inflammatory disorders and tumor sites. Therefore, a neutrophil-based drug delivery system (NDDS) has become a promising platform for anti-cancer and anti-inflammatory treatment. Recent decades have witnessed the huge progress of applying nanomaterials in drug delivery. Nanomaterials are regarded as innovative components to enrich the field of neutrophil-based therapies due to their unique physiochemical characteristics. In this review, the latest advancement of combining diverse nanomaterials with an NDDS for cancer and inflammatory disease treatment will be summarized. It is discussed how nanomaterials empower the therapeutic area of an NDDS and how an NDDS circumvents the limitations of nanomaterials. Moreover, based on the finding that neutrophils are closely involved in the progression of cancer and inflammatory diseases, emerging therapeutic strategies that target neutrophils will be outlined. Finally, as neutrophils were demonstrated to play a central role in the immunopathology of COVID-19, which causes necroinflammation that is responsible for the cytokine storm and sepsis during coronavirus infections, novel therapeutic approaches that anchor neutrophils against the pathological consequences related to COVID-19 will be highlighted as well.
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Affiliation(s)
- Lu Tang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Shun He
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Yue Yin
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Jing Li
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Qiaqia Xiao
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Ruotong Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Lijun Gao
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
| | - Wei Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, Jiangsu, P.R. China.
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Lipid nanovesicles for biomedical applications: 'What is in a name'? Prog Lipid Res 2021; 82:101096. [PMID: 33831455 DOI: 10.1016/j.plipres.2021.101096] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 03/28/2021] [Accepted: 03/28/2021] [Indexed: 12/12/2022]
Abstract
Vesicles, generally defined as self-assembled structures formed by single or multiple concentric bilayers that surround an aqueous core, have been widely used for biomedical applications. They can either occur naturally (e.g. exosomes) or be produced artificially and range from the micrometric scale to the nanoscale. One the most well-known vesicle is the liposome, largely employed as a drug delivery nanocarrier. Liposomes have been modified along the years to improve physicochemical and biological features, resulting in long-circulating, ligand-targeted and stimuli-responsive liposomes, among others. In this process, new nomenclatures were reported in an extensive literature. In many instances, the new names suggest the emergence of a new nanocarrier, which have caused confusion as to whether the vesicles are indeed new entities or could simply be considered modified liposomes. Herein, we discussed the extensive nomenclature of vesicles based on the suffix "some" that are employed for drug delivery and composed of various types and proportions of lipids and others amphiphilic compounds. New names have most often been selected based on changes of vesicle lipid composition, but the payload, structural complexity (e.g. multicompartment) and new/improved proprieties (e.g. elasticity) have also inspired new vesicle names. Based on this discussion, we suggested a rational classification for vesicles.
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Yang L, Zang G, Li J, Li X, Li Y, Zhao Y. Cell-derived biomimetic nanoparticles as a novel drug delivery system for atherosclerosis: predecessors and perspectives. Regen Biomater 2020; 7:349-358. [PMID: 32793380 PMCID: PMC7414994 DOI: 10.1093/rb/rbaa019] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 03/06/2020] [Accepted: 04/06/2020] [Indexed: 02/07/2023] Open
Abstract
Atherosclerosis is a key mechanism underlying the pathogenesis of cardiovascular disease, which is associated with high morbidity and mortality. In the field of precision medicine for the treatment of atherosclerosis, nanoparticle (NP)-mediated drug delivery systems have great potential, owing to their ability to release treatment locally. Cell-derived biomimetic NPs have attracted extensive attention at present due to their excellent targeting to atherosclerotic inflammatory sites, low immunogenicity and long blood circulation time. Here, we review the utility of cell-derived biomimetic NPs, including whole cells, cell membranes and extracellular vesicles, in the treatment of atherosclerosis.
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Affiliation(s)
- Long Yang
- Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China
| | - Guangchao Zang
- Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China
| | - Jingwen Li
- Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China
| | - Xinyue Li
- Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China
| | - Yuanzhu Li
- Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China
| | - Yinping Zhao
- Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China
- Correspondence address. Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, NO.1 Medical College Road, Yuzhong District, Chongqing 400016, China. Tel: +86 18883256765; E-mail:
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Sousa-Junior AA, Mendanha SA, Carrião MS, Capistrano G, Próspero AG, Soares GA, Cintra ER, Santos SFO, Zufelato N, Alonso A, Lima EM, Miranda JRA, Silveira-Lacerda EDP, Cardoso CG, Bakuzis AF. Predictive Model for Delivery Efficiency: Erythrocyte Membrane-Camouflaged Magnetofluorescent Nanocarriers Study. Mol Pharm 2020; 17:837-851. [PMID: 31977228 DOI: 10.1021/acs.molpharmaceut.9b01094] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Delivery efficiencies of theranostic nanoparticles (NPs) based on passive tumor targeting strongly depend either on their blood circulation time or on appropriate modulations of the tumor microenvironment. Therefore, predicting the NP delivery efficiency before and after a tumor microenvironment modulation is highly desirable. Here, we present a new erythrocyte membrane-camouflaged magnetofluorescent nanocarrier (MMFn) with long blood circulation time (92 h) and high delivery efficiency (10% ID for Ehrlich murine tumor model). MMFns owe their magnetic and fluorescent properties to the incorporation of manganese ferrite nanoparticles (MnFe2O4 NPs) and IR-780 (a lipophilic indocyanine fluorescent dye), respectively, to their erythrocyte membrane-derived camouflage. MMFn composition, morphology, and size, as well as optical absorption, zeta potential, and fluorescent, magnetic, and magnetothermal properties, are thoroughly examined in vitro. We then present an analytical pharmacokinetic (PK) model capable of predicting the delivery efficiency (DE) and the time of peak tumor uptake (tmax), as well as changes in DE and tmax due to modulations of the tumor microenvironment, for potentially any nanocarrier. Experimental PK data sets (blood and tumor amounts of MMFns) are simultaneously fit to the model equations using the PK modeling software Monolix. We then validate our model analytical solutions with the numerical solutions provided by Monolix. We also demonstrate how our a priori nonmechanistic model for passive targeting relates to a previously reported mechanistic model for active targeting. All in vivo PK studies, as well as in vivo and ex vivo biodistribution studies, were conducted using two noninvasive techniques, namely, fluorescence molecular tomography (FMT) and alternating current biosusceptometry (ACB). Finally, histopathology corroborates our PK and biodistribution results.
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Affiliation(s)
| | - Sebastião A Mendanha
- Physics Institute, Federal University of Goiás, Goiânia, Goiás 74690-900, Brazil
| | - Marcus S Carrião
- Physics Institute, Federal University of Goiás, Goiânia, Goiás 74690-900, Brazil
| | - Gustavo Capistrano
- Physics Institute, Federal University of Goiás, Goiânia, Goiás 74690-900, Brazil
| | - André G Próspero
- Biomagnetism Lab, Physics and Biophysics Department, São Paulo State University, Unesp, Botucatu, São Paulo 18618-000, Brazil
| | - Guilherme A Soares
- Biomagnetism Lab, Physics and Biophysics Department, São Paulo State University, Unesp, Botucatu, São Paulo 18618-000, Brazil
| | - Emílio R Cintra
- Laboratory of Pharmaceutical Nanotechnology and Drug Delivery Systems, School of Pharmacy, Federal University of Goiás, Goiânia, Goiás 74605-220, Brazil
| | - Sônia F O Santos
- Biological Sciences Institute, Federal University of Goiás, Goiânia, Goiás 74045-155, Brazil
| | - Nicholas Zufelato
- Physics Institute, Federal University of Goiás, Goiânia, Goiás 74690-900, Brazil
| | - Antônio Alonso
- Physics Institute, Federal University of Goiás, Goiânia, Goiás 74690-900, Brazil
| | - Eliana M Lima
- Laboratory of Pharmaceutical Nanotechnology and Drug Delivery Systems, School of Pharmacy, Federal University of Goiás, Goiânia, Goiás 74605-220, Brazil
| | - José Ricardo A Miranda
- Biomagnetism Lab, Physics and Biophysics Department, São Paulo State University, Unesp, Botucatu, São Paulo 18618-000, Brazil
| | | | - Cléver G Cardoso
- Biological Sciences Institute, Federal University of Goiás, Goiânia, Goiás 74045-155, Brazil
| | - Andris F Bakuzis
- Physics Institute, Federal University of Goiás, Goiânia, Goiás 74690-900, Brazil
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Hofmann C, Roth G, Hirsch T, Duerkop A, Baeumner AJ. Tethering functionality to lipid interfaces by a fast, simple and controllable post synthesis method. Colloids Surf B Biointerfaces 2019; 181:325-332. [PMID: 31154143 DOI: 10.1016/j.colsurfb.2019.05.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/13/2019] [Accepted: 05/21/2019] [Indexed: 01/10/2023]
Abstract
HYPOTHESIS Liposomes require careful control of the surface design to ensure colloidal stability in complex matrices and target-specific binding to desired receptor units. Ideally, surface functionalization should be smart and controllable in terms of composition which is seldomly achieved by conventional methods. Therefore, a new strategy (insertion method) was developed and compared to the standard method (modification post-synthesis) using the model receptor biotin. EXPERIMENTS Dipalmitoylphosphatidylethanolamine-biotin (DPPE-biotin) was used in both procedures, lipopeptide-biotin and cholesterol-biotin were tested additionally for insertion into the intact lipid bilayer. The insertion method was optimized regarding incubation time, temperature and vesicle stability. The biotinylated vesicles of both functionalization methods were characterized with respect to their size, ζ-potential and binding functionality. FINDINGS Standard incorporation resulted in large variations in insertion-efficiency, high batch-to-batch differences, and an incorporation limit of 4 mol%. Best results were obtained through effortless insertion of the lipopeptide-biotin at room temperature. The concentration-controlled functionalization of liposomes (up to 10 mol%) could easily be monitored by the ζ-potential, resulted in reliable, quantitative binding to streptavidin and did not affect the analytical properties of the nanomaterial. This offers the possibility for a general modification strategy for lipid-based nanomaterials ideal for assay optimizations or multi-analyte detection.
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Affiliation(s)
- Carola Hofmann
- University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Guenter Roth
- ZBSA - (Center for Biological Systems Analysis), University of Freiburg, Habsburgerstraße 46, 79104 Freiburg, Germany; BIOSS - Center for Biological Signaling Studies, University Freiburg, Schänzlestrasse 21, 79104 Freiburg, Germany
| | - Thomas Hirsch
- University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Axel Duerkop
- University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Antje J Baeumner
- University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Universitätsstraße 31, 93053 Regensburg, Germany.
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