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Novel Non-Viral Vectors Based on Pluronic ® F68PEI with Application in Oncology Field. Polymers (Basel) 2022; 14:polym14235315. [PMID: 36501709 PMCID: PMC9739301 DOI: 10.3390/polym14235315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 12/07/2022] Open
Abstract
Copolymers composed of low-molecular-weight polyethylenimine (PEI) and amphiphilic Pluronics® are safe and efficient non-viral vectors for pDNA transfection. A variety of Pluronic® properties provides a base for tailoring transfection efficacy in combination with the unique biological activity of this polymer group. In this study, we describe the preparation of new copolymers based on hydrophilic Pluronic® F68 and PEI (F68PEI). F68PEI polyplexes obtained by doping with free F68 (1:2 and 1:5 w/w) allowed for fine-tuning of physicochemical properties and transfection activity, demonstrating improved in vitro transfection of the human bone osteosarcoma epithelial (U2OS) and oral squamous cell carcinoma (SCC-9) cells when compared to the parent formulation, F68PEI. Although all tested systems condensed pDNA at varying polymer/DNA charge ratios (N/P, 5/1−100/1), the addition of free F68 (1:5 w/w) resulted in the formation of smaller polyplexes (<200 nm). Analysis of polyplex properties by transmission electron microscopy and dynamic light scattering revealed varied polyplex morphology. Transfection potential was also found to be cell-dependent and significantly higher in SCC-9 cells compared to the control bPEI25k cells, as especially evident at higher N/P ratios (>25). The observed selectivity towards transfection of SSC-9 cells might represent a base for further optimization of a cell-specific transfection vehicle.
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Patel HS, Shaikh SJ, Ray D, Aswal VK, Vaidya F, Pathak C, Varade D, Rahdar A, Sharma RK. Structural transitions in mixed Phosphatidylcholine/Pluronic micellar systems and their in vitro therapeutic evaluation for poorly water-soluble drug. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Formulation and Characterization of Stimuli-Responsive Lecithin-Based Liposome Complexes with Poly(acrylic acid)/Poly(N,N-dimethylaminoethyl methacrylate) and Pluronic® Copolymers for Controlled Drug Delivery. Pharmaceutics 2022; 14:pharmaceutics14040735. [PMID: 35456569 PMCID: PMC9029292 DOI: 10.3390/pharmaceutics14040735] [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: 02/11/2022] [Revised: 03/18/2022] [Accepted: 03/24/2022] [Indexed: 11/24/2022] Open
Abstract
Polymer–liposome complexes (PLCs) can be efficiently applied for the treatment and/or diagnosis of several types of diseases, such as cancerous, dermatological, neurological, ophthalmic and orthopedic. In this work, temperature-/pH-sensitive PLC-based systems for controlled release were developed and characterized. The selected hydrophilic polymeric setup consists of copolymers of Pluronic®-poly(acrylic acid) (PLU-PAA) and Pluronic®-poly(N,N-dimethylaminoethyl methacrylate) (PLU-PD) synthesized by atom transfer radical polymerization (ATRP). The copolymers were incorporated into liposomes formulated from soybean lecithin, with different copolymer/phospholipid ratios (2.5, 5 and 10%). PLCs were characterized by evaluating their particle size, polydispersity, surface charge, capacity of release and encapsulation efficiency. Their cytotoxic potential was assessed by determining the viability of human epithelial cells exposed to them. The results showed that the incorporation of the synthesized copolymers positively contributed to the stabilization of the liposomes. The main accomplishments of this work were the innovative synthesis of PLU-PD and PLU-PAA by ATRP, and the liposome stabilization by their incorporation. The formulated PLCs exhibited relevant characteristics, notably stimuli-responsive attributes upon slight changes in pH and/or temperature, with proven absence of cellular toxicity, which could be of interest for the treatment or diagnosis of all diseases that cause some particular pH/temperature change in the target area.
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Calixarene-based artificial ionophores for chloride transport across natural liposomal bilayer: Synthesis, structure-function relationships, and computational study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2021; 1863:183667. [PMID: 34111414 DOI: 10.1016/j.bbamem.2021.183667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/18/2021] [Accepted: 06/01/2021] [Indexed: 02/07/2023]
Abstract
An amphiphilic calix[6]arene, alone or complexed with an axle to form a pseudo-rotaxane, has been embedded into liposomes prepared from 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) and the permeability of the membrane-doped liposomes towards Cl- ions has been evaluated by using lucigenin as the fluorescent probe. The pseudo-rotaxane promotes transmembrane transport of Cl- ions more than calix[6]arene does. Surprisingly, the quenching of lucigenin was very fast for liposomes doped with the positively charged axle alone. Molecular dynamics (MD) simulations and quantum-chemical calculations were also carried out for providing a semi-quantitative support to the experimental results.
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Wiwatchaitawee K, Quarterman JC, Geary SM, Salem AK. Enhancement of Therapies for Glioblastoma (GBM) Using Nanoparticle-based Delivery Systems. AAPS PharmSciTech 2021; 22:71. [PMID: 33575970 DOI: 10.1208/s12249-021-01928-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 01/10/2021] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most aggressive type of malignant brain tumor. Current FDA-approved treatments include surgical resection, radiation, and chemotherapy, while hyperthermia, immunotherapy, and most relevantly, nanoparticle (NP)-mediated delivery systems or combinations thereof have shown promise in preclinical studies. Drug-carrying NPs are a promising approach to brain delivery as a result of their potential to facilitate the crossing of the blood-brain barrier (BBB) via two main types of transcytosis mechanisms: adsorptive-mediated transcytosis (AMT) and receptor-mediated transcytosis (RMT). Their ability to accumulate in the brain can thus provide local sustained release of tumoricidal drugs at or near the site of GBM tumors. NP-based drug delivery has the potential to significantly reduce drug-related toxicity, increase specificity, and consequently improve the lifespan and quality of life of patients with GBM. Due to significant advances in the understanding of the molecular etiology and pathology of GBM, the efficacy of drugs loaded into vectors targeting this disease has increased in both preclinical and clinical settings. Multitargeting NPs, such as those incorporating multiple specific targeting ligands, are an innovative technology that can lead to decreased off-target effects while simultaneously having increased accumulation and action specifically at the tumor site. Targeting ligands can include antibodies, or fragments thereof, and peptides or small molecules, which can result in a more controlled drug delivery system compared to conventional drug treatments. This review focuses on GBM treatment strategies, summarizing current options and providing a detailed account of preclinical findings with prospective NP-based approaches aimed at improving tumor targeting and enhancing therapeutic outcomes for GBM patients.
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Calori IR, Pazin WM, Brunaldi K, Pellosi DS, Caetano W, Tedesco AC, Hioka N. Laurdan as fluorescent probe to determinate the critical micelle temperature of polymers from Pluronic®-coated fluid phase liposomes. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111562] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Ding P, Chen Y, Cao G, Shen H, Ju J, Li W. Solutol ®HS15+pluronicF127 and Solutol ®HS15+pluronicL61 mixed micelle systems for oral delivery of genistein. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:1947-1956. [PMID: 31239645 PMCID: PMC6559771 DOI: 10.2147/dddt.s201453] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/10/2019] [Indexed: 12/12/2022]
Abstract
Purpose: We aimed to prepare two oral drug delivery systems consisting of polyoxyl 15 hydroxystearate (HS15) with pluronicF127 (F127) and HS15 with pluronicL61 (L61) to overcome the challenges of genistein’s poor oral bioavailability. This provides a good strategy for enhancing the potential value of genistein. Methods: We designed two binary mixed micelle systems employing the organic solvent evaporation method using surfactants (HS15, L61, and F127). Formulations (GEN-F and GEN-L) were characterized by transmission electron microscopy. Drug content analysis, including entrapment efficiency (EE%), drug loading (DL%), and the cumulative amount of genistein released from the micelles, was performed using HPLC. The permeability of optimum formulation was measured in Caco-2 cell monolayers, and the oral bioavailability was evaluated in SD rats. Results: The solutions of GEN-F and GEN-L were observed to be transparent and colorless. GEN-F had a lower EE% of 80.79±0.55% and a DL% of 1.69±0.24% compared to GEN-L, which had an EE% 83.40±1.36% and a DL% 2.26±0.18%. TEM results showed that the morphology of GEN-F and GEN-L was homogeneous and resembled a spherical shape. The dilution and storage conditions had no significant effect on particle size and EE%. Genistein demonstrated a sustained release behavior when encapsulated in micelles. Pharmacokinetics study showed that the relative oral bioavailability of GEN-F and GEN-L increased by 2.23 and 3.46 fold while also enhancing the permeability of genistein across a Caco-2 cell monolayer compared to that of raw genistein. Conclusion: GEN-F and GEN-L as a drug delivery system provide an effective strategy for enhancing and further realizing the potential value of GEN.
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Affiliation(s)
- Pinggang Ding
- Department of Pharmaceutical Analysis and Metabolomics, Hospital of Integrated Traditional Chinese and Western Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, People's Republic of China.,Department of Pharmaceutical Analysis and Metabolomics, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, People's Republic of China
| | - Yuxuan Chen
- School of Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Guangshang Cao
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Hongxue Shen
- Department of Pharmaceutical Analysis and Metabolomics, Hospital of Integrated Traditional Chinese and Western Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, People's Republic of China.,Department of Pharmaceutical Analysis and Metabolomics, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, People's Republic of China
| | - Jianming Ju
- Department of Pharmaceutical Analysis and Metabolomics, Hospital of Integrated Traditional Chinese and Western Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, People's Republic of China.,Department of Pharmaceutical Analysis and Metabolomics, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, People's Republic of China
| | - Weiguang Li
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing, People's Republic of China
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Zhang W, Coughlin ML, Metzger JM, Hackel BJ, Bates FS, Lodge TP. Influence of Cholesterol and Bilayer Curvature on the Interaction of PPO-PEO Block Copolymers with Liposomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7231-7241. [PMID: 31117745 PMCID: PMC7050598 DOI: 10.1021/acs.langmuir.9b00572] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Interactions of nonionic poly(ethylene oxide)- b-poly(propylene oxide) (PEO-PPO) block copolymers, known as Pluronics or poloxamers, with cell membranes have been widely studied for a host of biomedical applications. Herein, we report how cholesterol within phosphatidylcholine (POPC) lipid bilayer liposomes and bilayer curvature affects the binding of several PPO-PEO-PPO triblocks with varying PPO content and a tPPO-PEO diblock, where t refers to a tert-butyl end group. Pulsed-field-gradient NMR was employed to quantify the extent of copolymer associated with liposomes prepared with cholesterol concentrations ranging from 0 to 30 mol % relative to the total content of POPC and cholesterol and vesicle extrusion radii of 25, 50, or 100 nm. The fraction of polymer bound to the liposomes was extracted from NMR data on the basis of the very different mobilities of the bound and free polymers in aqueous solution. Cholesterol concentration was manipulated by varying the molar percentage of this sterol in the POPC bilayer preparation. The membrane curvature was varied by adjusting the liposome size through a conventional pore extrusion technique. Although the PPO content significantly influences the overall amount of block copolymer adsorbed to the liposome, we found that polymer binding decreases with increasing cholesterol concentration in a universal fashion, with the fraction of bound polymer dropping 10-fold between 0 and 30 mol % cholesterol relative to the total content of POPC and cholesterol. Increasing the bilayer curvature (decreasing the radius of the liposome) in the absence of cholesterol increases polymer binding between 2- and 4-fold over the range of liposome sizes studied. These results demonstrate that cholesterol plays a dominant role, and bilayer curvature has a less significant impact as the curvature decreases, on polymer-membrane association.
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Affiliation(s)
- Wenjia Zhang
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - McKenzie L. Coughlin
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Joseph M. Metzger
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Benjamin J. Hackel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank S. Bates
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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9
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Temnov AA, Sklifas AN, Kukushkin NI, Krechetov SP, Gorina EV, Astrelina TA, Usupzhanova DY, Suchkova YB, Kobzeva IV, Samoilov AS. The Effect of Polyoxyethylene–Polyoxypropylene Triblock Copolymers on the Loading Degree of Poly-(Lactic-co-Glycolic Acid) Copolymer-Based Microparticles Containing Chlorin e6 and Ethidium Bromide in Mesenchymal Stem Cells. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s0006350919020179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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10
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You Q, Hopf T, Hintz W, Rannabauer S, Voigt N, van Wachem B, Henrich-Noack P, Sabel BA. Major effects on blood-retina barrier passage by minor alterations in design of polybutylcyanoacrylate nanoparticles. J Drug Target 2018; 27:338-346. [DOI: 10.1080/1061186x.2018.1531416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Qing You
- Institute of Medical Psychology, Otto-von-Guericke University, Magdeburg, Germany
| | - Talea Hopf
- Institute of Process Engineering, Otto-von-Guericke University, Magdeburg, Germany
| | - Werner Hintz
- Institute of Process Engineering, Otto-von-Guericke University, Magdeburg, Germany
| | - Stefan Rannabauer
- Institute of Materials and Joining Technology, Otto-von-Guericke University, Magdeburg, Germany
| | - Nadine Voigt
- Institute of Medical Psychology, Otto-von-Guericke University, Magdeburg, Germany
| | - B. van Wachem
- Institute of Process Engineering, Otto-von-Guericke University, Magdeburg, Germany
| | - Petra Henrich-Noack
- Institute of Medical Psychology, Otto-von-Guericke University, Magdeburg, Germany
| | - Bernhard A. Sabel
- Institute of Medical Psychology, Otto-von-Guericke University, Magdeburg, Germany
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11
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Yaroslavov AA, Efimova AA, Mulashkin FD, Rudenskaya GN, Krivtsov GG. Biodegradable liposome–chitosan complexes: enzyme-mediated release of encapsulated substances. MENDELEEV COMMUNICATIONS 2018. [DOI: 10.1016/j.mencom.2018.03.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Effect of three pluronic polymers on the transport of an organic cation across a POPG bilayer studied by Second Harmonic spectroscopy. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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An electrostatic conjugate composed of liposomes, polylysine and a polylactide micelle: a biodegradability–cytotoxicity relationship. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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14
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Optimization of Phospholipid Nanoparticle Formulations Using Response Surface Methodology. J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-015-1757-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Sandez-Macho I, Casas M, Lage EV, Rial-Hermida MI, Concheiro A, Alvarez-Lorenzo C. Interaction of poloxamine block copolymers with lipid membranes: Role of copolymer structure and membrane cholesterol content. Colloids Surf B Biointerfaces 2015; 133:270-7. [DOI: 10.1016/j.colsurfb.2015.06.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 06/05/2015] [Accepted: 06/08/2015] [Indexed: 10/23/2022]
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16
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Hädicke A, Blume A. Interactions of Pluronic block copolymers with lipid vesicles depend on lipid phase and Pluronic aggregation state. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3414-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Abstract
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Multidrug
resistance (MDR) remains one of the biggest obstacles
for effective cancer therapy. Currently there are only few methods
that are available clinically that are used to bypass MDR with very
limited success. In this review we describe how MDR can be overcome
by a simple yet effective approach of using amphiphilic block copolymers.
Triblock copolymers of poly(ethylene oxide) (PEO) and poly(propylene
oxide) (PPO), arranged in a triblock structure PEO-PPO-PEO, Pluronics
or “poloxamers”, raised a considerable interest in the
drug delivery field. Previous studies demonstrated that Pluronics
sensitize MDR cancer cells resulting in increased cytotoxic activity
of Dox, paclitaxel, and other drugs by 2–3 orders of magnitude.
Pluronics can also prevent the development of MDR in vitro and in vivo. Additionally, promising results of
clinical studies of Dox/Pluronic formulation reinforced the need to
ascertain a thorough understanding of Pluronic effects in tumors.
These effects are extremely comprehensive and appear on the level
of plasma membranes, mitochondria, and regulation of gene expression
selectively in MDR cancer cells. Moreover, it has been demonstrated
recently that Pluronics can effectively deplete tumorigenic intrinsically
drug-resistant cancer stem cells (CSC). Interestingly, sensitization
of MDR and inhibition of drug efflux transporters is not specific
or selective to Pluronics. Other amphiphilic polymers have shown similar
activities in various experimental models. This review summarizes
recent advances of understanding the Pluronic effects in sensitization
and prevention of MDR.
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Affiliation(s)
- Daria Y Alakhova
- Center for Nanotechnology in Drug Delivery and Division of Molecular Pharmaceutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-7362, United States
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Poloxamers as Drug-Delivery Systems: Physicochemical, Pharmaceutical, and Toxicological Aspects. Nanotoxicology 2014. [DOI: 10.1007/978-1-4614-8993-1_13] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Bondar OV, Badeev YV, Shtyrlin YG, Abdullin TI. Lipid-like trifunctional block copolymers of ethylene oxide and propylene oxide: effective and cytocompatible modulators of intracellular drug delivery. Int J Pharm 2013; 461:97-104. [PMID: 24239835 DOI: 10.1016/j.ijpharm.2013.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 11/01/2013] [Indexed: 11/19/2022]
Abstract
A new glycerol-based trifunctional block copolymer (TBC) of propylene oxide and ethylene oxide and its conjugate with succinic acid (TBC-SA) were studied as a drug delivery system and compared with Pluronic L61. TBCs have multiple effects on the plasma membrane of human cells, e.g. increasing its fluidity and ion permeability, inhibiting ATPase activity of efflux transporter P-glycoprotein through reversible membrane destabilization. Such membrane-modulating properties attributed to the unimer form of copolymers increase in the order Pluronic L61≪TBC<TBC-SA and correlate with an ability of TBCs to promote the accumulation of P-glycoprotein substrates in lung cancer A549 cells. Furthermore, TBC, and especially TBC-SA, exhibit substantially lower hemolytic, cytotoxic and proapoptotic activities in comparison with Pluronic L61. Our results demonstrate that TBCs are promising analogs of bifunctional Pluronics in anticancer drug delivery.
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Affiliation(s)
- Oksana V Bondar
- Kazan (Volga Region) Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia
| | - Yuriy V Badeev
- Kazan (Volga Region) Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia
| | - Yurii G Shtyrlin
- Kazan (Volga Region) Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia
| | - Timur I Abdullin
- Kazan (Volga Region) Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia.
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Hädicke A, Blume A. Interactions of Pluronic block copolymers with lipid monolayers studied by epi-fluorescence microscopy and by adsorption experiments. J Colloid Interface Sci 2013; 407:327-38. [PMID: 23859816 DOI: 10.1016/j.jcis.2013.06.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 06/12/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
Abstract
The interactions of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers, i.e. Pluronics F87, F88 and F127, with monolayers composed of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) were investigated with different monolayer techniques. Surface pressure-area isotherms were recorded of co-spread Pluronic/lipid mixtures with different Pluronic content to determine the influence of the polymers on the monolayer phase transitions. The squeeze-out pressure of the polymers upon film compression was dependent on the PPO block length. The monolayer compression experiments were coupled with fluorescence microscopy to visualize the phase separation into polymer-rich and lipid-rich domains and to monitor morphological changes of the lipid domains in the monolayer. Extensive phase separation was observed in the coexistence region between liquid-expanded (LE) and liquid-condensed (LC) lipid phases, where pure polymer domains coexisting with round LE-domains containing polymer, and polymer-free LC-domains were seen. We also investigated the adsorption of Pluronics to a lipid monolayer after injecting a polymer solution underneath a pre-formed lipid monolayer by following the change in pressure at constant area. The results show that polymer adsorption is a superposition of two individual processes with different kinetics. Pluronics with a higher hydrophobicity and with a smaller molecular weight adsorb faster and the type and phase state of the lipid determines the surface pressure where no further Pluronic molecules adsorb to the interface. This critical surface pressure depends on the PPO block length, whereas the strength of the interaction with the lipids is determined by the relative PEO content. This indicates that also interactions between the PEO blocks and the lipid headgroup region are occurring. The interactions with the unsaturated lipid POPC in the liquid-expanded phase turn out to be stronger than for lipids in the liquid-condensed phase, where the polymers are excluded.
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Affiliation(s)
- André Hädicke
- Institute of Chemistry, Martin-Luther-University Halle-Wittenberg, von-Danckelmann-Platz 4, 06120 Halle/Saale, Germany
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Wang Y, Liu E, Sun X, Huang P, Long H, Wang H, Yu X, Zheng C, Huang Y. Pluronic L61 as a long-circulating modifier for enhanced liposomal delivery of cancer drugs. Polym Chem 2013. [DOI: 10.1039/c3py00042g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Yaroslavov AA, Efimova AA, Kostenko SN. Structure and properties of complexes formed by cationic polymers and anionic cholesterol-containing liposomes. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x12040086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Transport of drugs across the blood-brain barrier by nanoparticles. J Control Release 2011; 161:264-73. [PMID: 21872624 DOI: 10.1016/j.jconrel.2011.08.017] [Citation(s) in RCA: 436] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 08/10/2011] [Accepted: 08/11/2011] [Indexed: 01/16/2023]
Abstract
The central nervous system is well protected by the blood-brain barrier (BBB) which maintains its homeostasis. Due to this barrier many potential drugs for the treatment of diseases of the central nervous system (CNS) cannot reach the brain in sufficient concentrations. One possibility to deliver drugs to the CNS is the employment of polymeric nanoparticles. The ability of these carriers to overcome the BBB and to produce biologic effects on the CNS was shown in a number of studies. Over the past few years, progress in understanding of the mechanism of the nanoparticle uptake into the brain was made. This mechanism appears to be receptor-mediated endocytosis in brain capillary endothelial cells. Modification of the nanoparticle surface with covalently attached targeting ligands or by coating with certain surfactants enabling the adsorption of specific plasma proteins are necessary for this receptor-mediated uptake. The delivery of drugs, which usually are not able to cross the BBB, into the brain was confirmed by the biodistribution studies and pharmacological assays in rodents. Furthermore, the presence of nanoparticles in the brain parenchyma was visualized by electron microscopy. The intravenously administered biodegradable polymeric nanoparticles loaded with doxorubicin were successfully used for the treatment of experimental glioblastoma. These data, together with the possibility to employ nanoparticles for delivery of proteins and other macromolecules across the BBB, suggest that this technology holds great promise for non-invasive therapy of the CNS diseases.
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Wohlfart S, Khalansky AS, Gelperina S, Maksimenko O, Bernreuther C, Glatzel M, Kreuter J. Efficient chemotherapy of rat glioblastoma using doxorubicin-loaded PLGA nanoparticles with different stabilizers. PLoS One 2011; 6:e19121. [PMID: 21573151 PMCID: PMC3089596 DOI: 10.1371/journal.pone.0019121] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 03/16/2011] [Indexed: 11/25/2022] Open
Abstract
Background Chemotherapy of glioblastoma is largely ineffective as the blood-brain barrier (BBB) prevents entry of most anticancer agents into the brain. For an efficient treatment of glioblastomas it is necessary to deliver anti-cancer drugs across the intact BBB. Poly(lactic-co-glycolic acid) (PLGA) nanoparticles coated with poloxamer 188 hold great promise as drug carriers for brain delivery after their intravenous injection. In the present study the anti-tumour efficacy of the surfactant-coated doxorubicin-loaded PLGA nanoparticles against rat glioblastoma 101/8 was investigated using histological and immunohistochemical methods. Methodology The particles were prepared by a high-pressure solvent evaporation technique using 1% polyvinylalcohol (PLGA/PVA) or human serum albumin (PLGA/HSA) as stabilizers. Additionally, lecithin-containing PLGA/HSA particles (Dox-Lecithin-PLGA/HSA) were prepared. For evaluation of the antitumour efficacy the glioblastoma-bearing rats were treated intravenously with the doxorubicin-loaded nanoparticles coated with poloxamer 188 using the following treatment regimen: 3×2.5 mg/kg on day 2, 5 and 8 after tumour implantation; doxorubicin and poloxamer 188 solutions were used as controls. On day 18, the rats were sacrificed and the antitumour effect was determined by measurement of tumour size, necrotic areas, proliferation index, and expression of GFAP and VEGF as well as Isolectin B4, a marker for the vessel density. Conclusion The results reveal a considerable anti-tumour effect of the doxorubicin-loaded nanoparticles. The overall best results were observed for Dox-Lecithin-PLGA/HSA. These data demonstrate that the poloxamer 188-coated PLGA nanoparticles enable delivery of doxorubicin across the blood-brain barrier in the therapeutically effective concentrations.
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Affiliation(s)
- Stefanie Wohlfart
- Institute of Pharmaceutical Technology, Goethe-University, Frankfurt, Germany
| | | | | | | | - Christian Bernreuther
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jörg Kreuter
- Institute of Pharmaceutical Technology, Goethe-University, Frankfurt, Germany
- * E-mail:
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25
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Krupka TM, Solorio L, Wilson RE, Wu H, Azar N, Exner AA. Formulation and characterization of echogenic lipid-Pluronic nanobubbles. Mol Pharm 2010; 7:49-59. [PMID: 19957968 DOI: 10.1021/mp9001816] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The advent of microbubble contrast agents has enhanced the capabilities of ultrasound as a medical imaging modality and stimulated innovative strategies for ultrasound-mediated drug and gene delivery. While the utilization of microbubbles as carrier vehicles has shown encouraging results in cancer therapy, their applicability has been limited by a large size which typically confines them to the vasculature. To enhance their multifunctional contrast and delivery capacity, it is critical to reduce bubble size to the nanometer range without reducing echogenicity. In this work, we present a novel strategy for formulation of nanosized, echogenic lipid bubbles by incorporating the surfactant Pluronic, a triblock copolymer of ethylene oxide copropylene oxide coethylene oxide into the formulation. Five Pluronics (L31, L61, L81, L64 and P85) with a range of molecular weights (M(w): 1100 to 4600 Da) were incorporated into the lipid shell either before or after lipid film hydration and before addition of perfluorocarbon gas. Results demonstrate that Pluronic-lipid interactions lead to a significantly reduced bubble size. Among the tested formulations, bubbles made with Pluronic L61 were the smallest with a mean hydrodynamic diameter of 207.9 +/- 74.7 nm compared to the 880.9 +/- 127.6 nm control bubbles. Pluronic L81 also significantly reduced bubble size to 406.8 +/- 21.0 nm. We conclude that Pluronic is effective in lipid bubble size control, and Pluronic M(w), hydrophilic-lipophilic balance (HLB), and Pluronic/lipid ratio are critical determinants of the bubble size. Most importantly, our results have shown that although the bubbles are nanosized, their stability and in vitro and in vivo echogenicity are not compromised. The resulting nanobubbles may be better suited for contrast enhanced tumor imaging and subsequent therapeutic delivery.
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Affiliation(s)
- Tianyi M Krupka
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, USA
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26
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Chieng YY, Chen SB. Interaction and complexation of phospholipid vesicles and triblock copolymers. J Phys Chem B 2010; 113:14934-42. [PMID: 19835402 DOI: 10.1021/jp906929u] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mixtures of Pluronic (F-127 or L-61) and phospholipid were investigated for a wide range of Pluronic concentrations (0-15 wt %) using dynamic light scattering, differential scanning calorimetry, and fluorescence microscopy. The present study is aimed at better understanding how the amphiphilic triblock copolymers affect the lipid vesicles, particularly in the high-concentration regime. Our results show that L-61 interacts more strongly with phospholipid vesicles than F-127 when the copolymer is at the unimer state in the solution. For high concentrations, F-127 forms mixed micelles with solubilized lipid molecules in the form of bilayer patches. This novel behavior was observed for the first time. In contrast, more hydrophobic L-61 tends to precipitate with the solubilized lipids as large crew-cut mixed aggregates.
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Affiliation(s)
- Yu Yuan Chieng
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576
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27
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Peetla C, Stine A, Labhasetwar V. Biophysical interactions with model lipid membranes: applications in drug discovery and drug delivery. Mol Pharm 2009; 6:1264-76. [PMID: 19432455 DOI: 10.1021/mp9000662] [Citation(s) in RCA: 336] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The transport of drugs or drug delivery systems across the cell membrane is a complex biological process, often difficult to understand because of its dynamic nature. In this regard, model lipid membranes, which mimic many aspects of cell-membrane lipids, have been very useful in helping investigators to discern the roles of lipids in cellular interactions. One can use drug-lipid interactions to predict pharmacokinetic properties of drugs, such as their transport, biodistribution, accumulation, and hence efficacy. These interactions can also be used to study the mechanisms of transport, based on the structure and hydrophilicity/hydrophobicity of drug molecules. In recent years, model lipid membranes have also been explored to understand their mechanisms of interactions with peptides, polymers, and nanocarriers. These interaction studies can be used to design and develop efficient drug delivery systems. Changes in the lipid composition of cells and tissue in certain disease conditions may alter biophysical interactions, which could be explored to develop target-specific drugs and drug delivery systems. In this review, we discuss different model membranes, drug-lipid interactions and their significance, studies of model membrane interactions with nanocarriers, and how biophysical interaction studies with lipid model membranes could play an important role in drug discovery and drug delivery.
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Affiliation(s)
- Chiranjeevi Peetla
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA
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28
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Wu G, Lee KYC. Effects of poloxamer 188 on phospholipid monolayer morphology: an atomic force microscopy study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:2133-2139. [PMID: 19140701 DOI: 10.1021/la802908x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
P188, a triblock copolymer of the form poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) is known as an effective membrane sealant. Using a dipalmitoylphosphatidylcholine monolayer at the air-water interface to mimic the outer leaflet of the cell membrane, we have examined the interaction between P188 and a phospholipid film. Atomic force microscopy (AFM) was used to investigate the morphological changes in the lipid monolayer induced by P188 insertion upon transferring the lipid/polymer film from the air-water interface onto a solid substrate. Our AFM results confirm that lipid packing regulates poloxamer insertion such that P188 only changes the morphology of a lipid monolayer when the lipid packing density is below that of the insertion threshold. By combining phase imaging and different driving forces in tapping mode AFM, our results further help reveal the distribution of poloxamers in the lipid monolayer with nanometer resolution.
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Affiliation(s)
- Guohui Wu
- Department of Chemistry, the Institute for Biophysical Dynamics & the James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
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29
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Hartikka J, Geall A, Bozoukova V, Kurniadi D, Rusalov D, Enas J, Yi JH, Nanci A, Rolland A. Physical characterization and in vivo evaluation of poloxamer-based DNA vaccine formulations. J Gene Med 2008; 10:770-82. [PMID: 18425981 DOI: 10.1002/jgm.1199] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Plasmid DNA (pDNA) vaccines have generated significant interest for the prevention or treatment of infectious diseases. Broader applications may benefit from the identification of safe and potent vaccine adjuvants. This report describes the development of a novel polymer-based formulation to enhance the immunogenicity of pDNA-based vaccines. METHODS Plasmid DNA was formulated with a nonionic block copolymer, poloxamer CRL1005, and the cationic surfactant benzalkonium chloride (BAK) to produce a thermodynamically stable, self-assembling system. The influence of parameters such as polymer concentration and BAK composition on the immune responses was evaluated in mice vaccinated with pDNA encoding influenza nucleoprotein. RESULTS At concentrations of 7.5 mg/ml CRL1005, 0.3 mM BAK and 5 mg/ml pDNA, CRL1005/BAK/pDNA particles had a mean diameter of 261 +/- 0.2 nm and a surface charge of - 11.6 +/- 0.9 mV. The negative surface charge and atomic force microscopy images suggested that pDNA binds to BAK adsorbed to the surface of poloxamer particles. The CRL1005/BAK/pDNA formulation significantly enhanced antigen-specific cellular and humoral immune responses, and increased transgene levels in muscle and serum. The complexity of the formulation was reduced by replacing the commercial BAK, which is a mixture of four alkyl chains, with a C14 BAK homolog. The substitution yielded an analytically preferable formulation with equivalent physical characteristics and immunogenicity. CONCLUSIONS The results suggest that the CRL1005/BAK/pDNA formulation may enhance immunogenicity by improving the delivery of pDNA-based vaccines. This formulation is currently being evaluated for the prevention of CMV-associated disease in a phase 2 clinical trial.
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Affiliation(s)
- Jukka Hartikka
- Vical Incorporated, 10390 Pacific Center Court, San Diego, CA 92121-4340, USA.
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30
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Chang LC, Chang YY, Gau CS. Interfacial properties of Pluronics and the interactions between Pluronics and cholesterol/DPPC mixed monolayers. J Colloid Interface Sci 2008; 322:263-73. [PMID: 18377918 DOI: 10.1016/j.jcis.2008.02.051] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2007] [Revised: 02/26/2008] [Accepted: 02/26/2008] [Indexed: 11/28/2022]
Abstract
Pluronics are triblock copolymers of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) with wide range of hydrophilic-lipophilic balance. In order to investigate the relationship between the chemical structures of Pluronics and the interfacial properties at the air-water interface by monolayer techniques, Pluronics L61, P65, F68, P84, P123, L35, and P105 were selected. Since cholesterol influenced substantially the molecular packing stage and the characteristics of cell membranes, the interactions between Pluronics and model cell membranes in the absence and presence of cholesterol were compared. The results of pi-A isotherms and surface elasticities of Pluronic monolayers indicated that the first and second transition like stage were mainly affected by the numbers of EO and PO monomers, respectively. Pluronics with higher hydrophobicities demonstrated larger surface activities and penetration abilities to dipalmitoylphosphatidylcholine (DPPC) monolayers, which might be due to hydrophobic interactions and van der Waals forces. In the presence of cholesterol, hydrogen bonding effects was supposed to exist between the 3beta-hydroxy group of cholesterol and ether oxygen of PEO chains, which led Pluronic F68, with the longest PEO chain herein, to exhibit significantly higher penetration ability. Our findings proposed a theoretical basis for selection of optimized drug carriers and the starting point for further investigations.
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Affiliation(s)
- Lin-Chau Chang
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
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31
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Peetla C, Labhasetwar V. Biophysical Characterization of Nanoparticle−Endothelial Model Cell Membrane Interactions. Mol Pharm 2008; 5:418-29. [DOI: 10.1021/mp700140a] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Chiranjeevi Peetla
- Department of Biomedical Engineering, Lerner Research Institute, and Taussig Cancer Center, Cleveland Clinic, Cleveland, Ohio 44195
| | - Vinod Labhasetwar
- Department of Biomedical Engineering, Lerner Research Institute, and Taussig Cancer Center, Cleveland Clinic, Cleveland, Ohio 44195
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32
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Bugrin VS, Melik-Nubarov NS. Relationship between the structure of compounds and the effect of Pluronic L61 on their permeation through lipid membranes. POLYMER SCIENCE SERIES A 2007. [DOI: 10.1134/s0965545x07090118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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33
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Mathot F, Schanck A, Van Bambeke F, Ariën A, Noppe M, Brewster M, Préat V. Passive diffusion of polymeric surfactants across lipid bilayers. J Control Release 2007; 120:79-87. [PMID: 17524515 DOI: 10.1016/j.jconrel.2007.03.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Revised: 03/20/2007] [Accepted: 03/23/2007] [Indexed: 11/29/2022]
Abstract
Self-assembling polymeric surfactant, mmePEG(750)P(CL-co-TMC) [monomethylether poly(ethylene glycol)(750)-poly(caprolactone-co-trimethylene carbonate)], increases drug solubility and crosses an enterocyte monolayer both in vitro and in vivo. The aims of the present work were to investigate whether mmePEG(750)P(CL-co-TMC) polymers can diffuse passively through lipid bilayer using parallel artificial membrane permeability assay (PAMPA) and affect membrane properties using liposomes as model. The mmePEG(750)P(CL-co-TMC) polymer was able to cross by passive diffusion an enterocyte-mimicking membrane in PAMPA at concentration which did not perturb membrane integrity. A weak rigidification associated with a low increase in permeability of liposomal lipid bilayers was observed. These data suggest that polymeric surfactants can cross the lipid membrane by passive diffusion and interact with lipid bilayers.
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Affiliation(s)
- Frédéric Mathot
- Université Catholique de Louvain, Unité de Pharmacie Galénique, UCL, Brussels, Belgium
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34
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Cronier F, Patenaude A, C-Gaudreault R, Auger M. Membrane composition modulates the interaction between a new class of antineoplastic agents deriving from aromatic 2-chloroethylureas and lipid bilayers: a solid-state NMR study. Chem Phys Lipids 2007; 146:125-35. [PMID: 17291469 DOI: 10.1016/j.chemphyslip.2007.01.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2006] [Revised: 01/09/2007] [Accepted: 01/11/2007] [Indexed: 10/23/2022]
Abstract
We have investigated the interaction between a new class of antineoplastic agents derived from arylchloroethylureas (CEU) with three different model membranes by (31)P and (2)H solid-state NMR spectroscopy. First, we have prepared model membranes that mimic the mitochondrial inner (Mito IM) and outer (Mito OM) membranes and the endoplasmic reticulum membrane (End Ret). Our results indicate that the effects of the CEU derivatives on lipid bilayers are related to their cytotoxic activity. More specifically, a strong correlation is observed between the drug location in both the mitochondrial inner and outer membranes and its cytotoxicity. In addition, the results indicate that the lipid composition of the model membrane has a very important influence on the effects of CEUs. More specifically, a high proportion of cardiolipin in the mitochondrial inner membrane gives this system the highest fluidity and consequently, this model membrane is more rigidified by the presence of CEUs compared to the mitochondrial outer and endoplasmic reticulum membranes. Finally, the results propound a hypothesis for the location of CEUs in membranes.
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Affiliation(s)
- Francis Cronier
- Département de Chimie, Centre de Recherche sur la Fonction, la Structure et l'Ingénierie des Protéines, Centre de Recherche en Sciences et Ingénierie des Macromolécules, Université Laval, Québec, Québec, Canada
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35
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Smith AS, Seifert U. Vesicles as a model for controlled (de-)adhesion of cells: a thermodynamic approach. SOFT MATTER 2007; 3:275-289. [PMID: 32900144 DOI: 10.1039/b611892e] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We review the specific adhesion between ligand-containing vesicles and receptor-functionalized substrates as an established model system used to study the cell recognition process and its control mechanisms. In order to provide better understanding of the underlying physics and to allow for quantitative exploitation of this system, we develop a simple theoretical framework that accounts for the equilibrium state of adhesion and successfully merges the macroscopic and microscopic aspects of the problem. Several mechanisms that are used to control adhesion or induce de-adhesion are studied on the same level of theory. Specifically, the repelling properties of adhesive molecules, the role of repelling molecules, the action of antagonists for a specific binder as well as the influence of an externally applied force are addressed independently within the same formalism.
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Affiliation(s)
- Ana-Sunčana Smith
- II. Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany. and Institut für Theoretische Physik I, Universität Erlangen-Nürnberg, Staudtstraße 7, D-70550 Erlangen, Germany
| | - Udo Seifert
- II. Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany.
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36
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Kabanov AV. Polymer genomics: an insight into pharmacology and toxicology of nanomedicines. Adv Drug Deliv Rev 2006; 58:1597-621. [PMID: 17126450 PMCID: PMC1853357 DOI: 10.1016/j.addr.2006.09.019] [Citation(s) in RCA: 148] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2006] [Accepted: 09/29/2006] [Indexed: 12/20/2022]
Abstract
Synthetic polymers and nanomaterials display selective phenotypic effects in cells and in the body signal transduction mechanisms involved in inflammation, differentiation, proliferation, and apoptosis. When physically mixed or covalently conjugated with cytotoxic agents, bacterial DNA or antigens, polymers can drastically alter specific genetically controlled responses to these agents. These effects, in part, result from cooperative interactions of polymers and nanomaterials with plasma cell membranes and trafficking of polymers and nanomaterials to intracellular organelles. Cells and whole organism responses to these materials can be phenotype or genotype dependent. In selected cases, polymer agents can bypass limitations to biological responses imposed by the genotype, for example, phenotypic correction of immune response by polyelectrolytes. Overall, these effects are relatively benign as they do not result in cytotoxicity or major toxicities in the body. Collectively, however, these studies support the need for assessing pharmacogenomic effects of polymer materials to maximize clinical outcomes and understand the pharmacological and toxicological effects of polymer formulations of biological agents, i.e. polymer genomics.
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Affiliation(s)
- Alexander V Kabanov
- Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Durham Research Center, 985830 Nebraska Medical Center, Omaha, Nebraska 68198-5830, USA.
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Zhirnov AE, Pavlov DN, Demina TV, Badun GA, Grozdova ID, Melik-Nubarov NS. Effect of the structure of ethylene oxide-propylene oxide block copolymers on their interaction with biological membranes. POLYMER SCIENCE SERIES A 2006. [DOI: 10.1134/s0965545x06110113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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Pavlov D, Alexandrova N, Krylova O, Pohl P, Melik-Nubarov N. Effect of block architecture on the ability of polyalkylene oxides to overcome multidrug resistance of tumor cells. J Drug Deliv Sci Technol 2006. [DOI: 10.1016/s1773-2247(06)50048-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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