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Yamashita S, Azuma K, Tanaka Y, Kimura S, Kiriyama A. Variations in the inner core affect the pharmacokinetics of indomethacin-encapsulated polymeric micelles. Int J Pharm 2024; 654:123933. [PMID: 38403090 DOI: 10.1016/j.ijpharm.2024.123933] [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: 11/09/2023] [Revised: 01/31/2024] [Accepted: 02/19/2024] [Indexed: 02/27/2024]
Abstract
Hydrophobic ion pairing (HIP) is a drug encapsulation technology that uses electrostatic interactions between a drug and an additive. However, although polymeric micelles can encapsulate hydrophobic drugs in the core, the encapsulated drug often leaks. Therefore, we designed polymeric micelles with HIP functionalized in a hydrophobic inner core using three diblock copolymers comprising polypeptides with different ratios of polar and hydrophobic amino acids and polyethylene glycol (PEG) to encapsulate indomethacin (IND). The three IND-encapsulated HIP micelles showed different area under the curve (AUC) values as an index of blood retention after intravenous injection in mice. Despite having the same PEG shell, IND-PEG-poly(H/F)n showed a 1.56-fold higher AUC than IND-PEG-poly(D/F)n. PEG interface morphologies were evaluated to determine the differences in pharmacokinetic parameters caused by changes in inner core HIP patterns. The micellarized diblock copolymer was desorbed from IND-PEG-poly(D/F)n due to electrostatic repulsion between IND and the diblock copolymer comprising aspartic acid. Our results suggest that changes in the HIP patterns of the micelle inner core affected the PEG interface morphologies, such as PEG density and diblock copolymer desorption from micelles. These phenomena might lead to changes in the interaction of plasma proteins and drug dispositions.
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Affiliation(s)
- Shugo Yamashita
- Department of Pharmacokinetics, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan.
| | - Karen Azuma
- Department of Pharmacokinetics, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
| | - Yuka Tanaka
- Department of Pharmacokinetics, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
| | - Shunsuke Kimura
- Department of Pharmacokinetics, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
| | - Akiko Kiriyama
- Department of Pharmacokinetics, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
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2
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Wibel R, Knoll P, Le-Vinh B, Kali G, Bernkop-Schnürch A. Synthesis and evaluation of sulfosuccinate-based surfactants as counterions for hydrophobic ion pairing. Acta Biomater 2022; 144:54-66. [PMID: 35292415 DOI: 10.1016/j.actbio.2022.03.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 02/08/2022] [Accepted: 03/07/2022] [Indexed: 11/26/2022]
Abstract
Hydrophobic ion pairing is a promising strategy to raise the lipophilic character of therapeutic peptides and proteins. In past studies, docusate, an all-purpose surfactant with a dialkyl sulfosuccinate structure, showed highest potential as hydrophobic counterion. Being originally not purposed for hydrophobic ion pairing, it is likely still far away from the perfect counterion. Thus, within this study, docusate analogues with various linear and branched alkyl residues were synthesized to derive systematic insights into which hydrophobic tail is most advantageous for hydrophobic ion pairing, as well as to identify lead counterions that form complexes with superior hydrophobicity. The successful synthesis of the target compounds was confirmed by FT-IR, 1H-NMR, and 13C-NMR. In a screening with the model protein hemoglobin, monostearyl sulfosuccinate, dioleyl sulfosuccinate, and bis(isotridecyl) sulfosuccinate were identified as lead counterions. Their potential was further evaluated with the peptides and proteins vancomycin, insulin, and horseradish peroxidase. Dioleyl sulfosuccinate and bis(isotridecyl) sulfosuccinate significantly increased the hydrophobicity of the tested peptides and proteins determined as logP or lipophilicity determined as solubility in 1-octanol, respectively, in comparison to the gold standard docusate. Dioleyl sulfosuccinate provided an up to 8.3-fold higher partition coefficient and up to 26.5-fold higher solubility in 1-octanol than docusate, whereas bis(isotridecyl) sulfosuccinate resulted in an up to 6.7-fold improvement in the partition coefficient and up to 44.0-fold higher solubility in 1-octanol. The conjugation of highly lipophilic alkyl tails to the polar sulfosuccinate head group allows the design of promising counterions for hydrophobic ion pairing. STATEMENT OF SIGNIFICANCE: Hydrophobic ion pairing enables efficient incorporation of hydrophilic molecules into lipid-based formulations by forming complexes with hydrophobic counterions. Docusate, a sulfosuccinate with two branched alkyl tails, has shown highest potential as anionic hydrophobic counterion. As it was originally not purposed for hydrophobic ion pairing, its structure is likely still far away from the perfect counterion. To improve its properties, analogues of docusate with various alkyl tails were synthesized in the present study. The investigation of different alkyl residues allowed to derive systematic insights into which tail structures are most favorable for hydrophobic ion pairing. Moreover, the lead counterions dioleyl sulfosuccinate and bis(isotridecyl) sulfosuccinate bearing highly lipophilic alkyl tails provided a significant improvement in the hydrophobicity of the resulting complexes.
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Maurya VK, Shakya A, Bashir K, Kushwaha SC, McClements DJ. Vitamin A fortification: Recent advances in encapsulation technologies. Compr Rev Food Sci Food Saf 2022; 21:2772-2819. [PMID: 35384290 DOI: 10.1111/1541-4337.12941] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/14/2022] [Accepted: 02/22/2022] [Indexed: 11/26/2022]
Abstract
Vitamin A is an essential micronutrient whose deficiency is still a major health concern in many regions of the world. It plays an essential role in human growth and development, immunity, and vision, but may also help prevent several other chronic diseases. The total amount of vitamin A in the human diet often falls below the recommended dietary allowance of approximately 900-1000 μ $ \umu $ g/day for a healthy adult. Moreover, a significant proportion of vitamin A may be degraded during food processing, storage, and distribution, thereby reducing its bioactivity. Finally, the vitamin A in some foods has a relatively low bioavailability, which further reduces its efficacy. The World Health Organization has recommended fortification of foods and beverages as a safe and cost-effective means of addressing vitamin A deficiency. However, there are several factors that must be overcome before effective fortified foods can be developed, including the low solubility, chemical stability, and bioavailability of this oil-soluble vitamin. Consequently, strategies are required to evenly disperse the vitamin throughout food matrices, to inhibit its chemical degradation, to avoid any adverse interactions with any other food components, to ensure the food is palatable, and to increase its bioavailability. In this review article, we discuss the chemical, physical, and nutritional attributes of vitamin A, its main dietary sources, the factors contributing to its current deficiency, and various strategies to address these deficiencies, including diet diversification, biofortification, and food fortification.
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Affiliation(s)
- Vaibhav Kumar Maurya
- Centre for Food Research and Analysis, National Institute of Food Technology Entrepreneurship and Management, Haryana, India
| | - Amita Shakya
- Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management, Haryana, India.,Division of Biotechnology, Cytogene Research & Development, Lucknow, India
| | - Khalid Bashir
- Department of Food Technology, Jamia Hamdard, New Delhi, India
| | - Satish Chand Kushwaha
- Centre for Food Research and Analysis, National Institute of Food Technology Entrepreneurship and Management, Haryana, India
| | - David Julian McClements
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA.,Department of Food Science & Bioengineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, China
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Odrobińska J, Mielańczyk Ł, Neugebauer D. 4- n-Butylresorcinol-Based Linear and Graft Polymethacrylates for Arbutin and Vitamins Delivery by Micellar Systems. Polymers (Basel) 2020; 12:polym12020330. [PMID: 32033296 PMCID: PMC7077416 DOI: 10.3390/polym12020330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/27/2020] [Accepted: 02/01/2020] [Indexed: 12/17/2022] Open
Abstract
A novel initiator, bromoester modified 4-n-butylresorcinol (4nBREBr2), was prepared and utilized in controlled atom transfer radical polymerization (ATRP) to obtain three series of amphiphilic copolymers. The V-shaped copolymers of methyl methacrylate (MMA), 2-hydroxyethyl methacrylate (HEMA), and poly(ethylene glycol) methyl ether methacrylate (MPEGMA), abbreviated to P(HEMA-co-MMA), P(HEMA-co-MPEGMA), and P(MMA-co-MPEGMA), were synthesized. Moreover, P((HEMA-graft-PEG)-co-MMA) graft copolymers were prepared by combining the pre-polymerization modification of HEMA and a "click" reaction using a "grafting onto" approach. All copolymers could form micelles with encapsulated active substances (vitamin C (VitC), vitamin E (VitE), arbutin (ARB)), which are used in cosmetology. In vitro studies carried out in a PBS solution (pH 7.4) demonstrates that in most cases the maximum release of active substance was after 1 h. The polymeric systems presenting satisfactory encapsulation characteristics and release profiles are attractive micellar carriers of cosmetic substances, which show a positive effect on the skin condition.
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Affiliation(s)
- Justyna Odrobińska
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland;
| | - Łukasz Mielańczyk
- Department of Histology and Cell Pathology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland;
| | - Dorota Neugebauer
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland;
- Correspondence:
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5
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Hollow silica nanoparticles synthesized from core-shell nanoparticles as highly efficient adsorbent for methylene blue and its invitro release: Mechanism and Kinetics study. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124333] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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6
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Hurley SK, Cutrone NM, Fath KR, Pajovich HT, Garcia J, Smith AM, Banerjee IA. Self-assembled phenylisoxazole-peptide hybrid assemblies and their interactions with breast and ovarian tumor cells. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2018.1525542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sara K. Hurley
- Department of Chemistry, Fordham University, Bronx, NY, USA
| | | | - Karl R. Fath
- Department of Biology, Queens College, City University of New York, New York, NY, USA
| | | | - Jeremy Garcia
- Department of Biology, Queens College, City University of New York, New York, NY, USA
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7
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Ristroph KD, Prud'homme RK. Hydrophobic ion pairing: encapsulating small molecules, peptides, and proteins into nanocarriers. NANOSCALE ADVANCES 2019; 1:4207-4237. [PMID: 33442667 PMCID: PMC7771517 DOI: 10.1039/c9na00308h] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 09/18/2019] [Indexed: 05/26/2023]
Abstract
Hydrophobic ion pairing has emerged as a method to modulate the solubility of charged hydrophilic molecules ranging in class from small molecules to large enzymes. Charged hydrophilic molecules are ionically paired with oppositely-charged molecules that include hydrophobic moieties; the resulting uncharged complex is water-insoluble and will precipitate in aqueous media. Here we review one of the most prominent applications of hydrophobic ion pairing: efficient encapsulation of charged hydrophilic molecules into nano-scale delivery vehicles - nanoparticles or nanocarriers. Hydrophobic complexes are formed and then encapsulated using techniques developed for poorly-water-soluble therapeutics. With this approach, researchers have reported encapsulation efficiencies up to 100% and drug loadings up to 30%. This review covers the fundamentals of hydrophobic ion pairing, including nomenclature, drug eligibility for the technique, commonly-used counterions, and drug release of encapsulated ion paired complexes. We then focus on nanoformulation techniques used in concert with hydrophobic ion pairing and note strengths and weaknesses specific to each. The penultimate section bridges hydrophobic ion pairing with the related fields of polyelectrolyte coacervation and polyelectrolyte-surfactant complexation. We then discuss the state of the art and anticipated future challenges. The review ends with comprehensive tables of reported hydrophobic ion pairing and encapsulation from the literature.
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Affiliation(s)
- Kurt D. Ristroph
- Department of Chemical and Biological Engineering, Princeton UniversityPrincetonNew Jersey 08544USA
| | - Robert K. Prud'homme
- Department of Chemical and Biological Engineering, Princeton UniversityPrincetonNew Jersey 08544USA
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8
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Shiraishi K, Yokoyama M. Toxicity and immunogenicity concerns related to PEGylated-micelle carrier systems: a review. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2019; 20:324-336. [PMID: 31068982 PMCID: PMC6493319 DOI: 10.1080/14686996.2019.1590126] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/01/2019] [Accepted: 03/01/2019] [Indexed: 05/02/2023]
Abstract
Polymeric-micelle carrier systems have emerged as a novel drug-carrier system and have been actively studied for anticancer drug targeting. In contrast, toxicological and immunological concerns related to not only polymeric-micelle carrier systems, but also other nanocarrier systems, have received little attention owing to researchers' focus on therapeutic effects. However, in recent clinical contexts, biopharmaceuticals' effects on immune responses have come to light, requiring that researchers substantively explore the potential negative side effects of nanocarrier systems and of therapeutic proteins in order to develop nanocarrier systems suitable for clinical use. The present review describes current insights into both toxicological and immunological issues regarding polymeric-micelle carrier systems. The review focuses on immunogenicity issues of polymeric-micelle carrier systems possessing poly(ethylene glycol) (PEG). We conclude that PEG-related immunogenicity is deeply related to characteristics of a counterpart block of PEG-conjugates, and we propose future directions for addressing this unresolved issue.
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Affiliation(s)
- Kouichi Shiraishi
- Division of Medical Engineering, Research Center for Medical Sciences, The Jikei University School of Medicine, Kashiwa, Chiba, Japan
| | - Masayuki Yokoyama
- Division of Medical Engineering, Research Center for Medical Sciences, The Jikei University School of Medicine, Kashiwa, Chiba, Japan
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9
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Hussein YHA, Youssry M. Polymeric Micelles of Biodegradable Diblock Copolymers: Enhanced Encapsulation of Hydrophobic Drugs. MATERIALS 2018; 11:ma11050688. [PMID: 29702593 PMCID: PMC5978065 DOI: 10.3390/ma11050688] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 04/20/2018] [Accepted: 04/24/2018] [Indexed: 12/26/2022]
Abstract
Polymeric micelles are potentially efficient in encapsulating and performing the controlled release of various hydrophobic drug molecules. Understanding the fundamental physicochemical properties behind drug⁻polymer systems in terms of interaction strength and compatibility, drug partition coefficient (preferential solubilization), micelle size, morphology, etc., encourages the formulation of polymeric nanocarriers with enhanced drug encapsulating capacity, prolonged circulation time, and stability in the human body. In this review, we systematically address some open issues which are considered to be obstacles inhibiting the commercial availability of polymer-based therapeutics, such as the enhancement of encapsulation capacity by finding better drug⁻polymer compatibility, the drug-release kinetics and mechanisms under chemical and mechanical conditions simulating to physiological conditions, and the role of preparation methods and solvents on the overall performance of micelles.
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Affiliation(s)
- Yasser H A Hussein
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar.
| | - Mohamed Youssry
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar.
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10
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Baek JS, Yeo EW, Lee YH, Tan NS, Loo SCJ. Controlled-release nanoencapsulating microcapsules to combat inflammatory diseases. Drug Des Devel Ther 2017; 11:1707-1717. [PMID: 28652708 PMCID: PMC5472418 DOI: 10.2147/dddt.s133344] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The World Health Organization (WHO) has reported that globally 235 million people suffer from chronic and other inflammatory diseases. The short half-lives of nonsteroidal anti-inflammatory drugs (NSAIDs) and their notoriety in causing gastrointestinal discomforts, warrants these drugs to be released in a controlled and sustained manner. Although polymeric particles have been widely used for drug delivery, there are few reports that showcase their ability in encapsulating and sustaining the release of NSAIDs. In this paper, polymeric nanoencapsulating microcapsules loaded with NSAIDs were fabricated using solid/water/oil/water emulsion solvent evaporation method. Two NSAIDs, ibuprofen and naproxen, were first pre-loaded into nanoparticles and then encapsulated into a larger hollow microcapsule that contained the third NSAID, celecoxib. A high encapsulation efficiency (%) of these NSAIDs was achieved and a sustained release (up to 30 days) of these drugs in phosphate-buffered saline was observed. Then, a gastrointestinal drug - cimetidine (CIM) - was co-loaded with the NSAIDs. This floating delivery system exhibited excellent buoyancy (~88% up to 24 h) in simulated gastric fluid. It also allowed a sequential release of the drugs, whereby an immediate release of CIM followed by NSAIDs was observed. Drug release of the NSAIDs observed Fickian diffusion mechanism, whereas CIM observed non-Fickian diffusion. Therefore, this delivery system is a promising platform to control the delivery of NSAIDs to combat inflammatory diseases, thereby protecting against possible gastrointestinal side effects that may arise from the overuse of NSAIDs.
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Affiliation(s)
- Jong-Suep Baek
- School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Eng Wan Yeo
- School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Yin Hao Lee
- School of Biological Sciences, Nanyang Technological University, Singapore
| | - Nguan Soon Tan
- School of Biological Sciences, Nanyang Technological University, Singapore
| | - Say Chye Joachim Loo
- School of Materials Science and Engineering, Nanyang Technological University, Singapore
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore
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Lakkireddy HR, Bazile D. Building the design, translation and development principles of polymeric nanomedicines using the case of clinically advanced poly(lactide(glycolide))-poly(ethylene glycol) nanotechnology as a model: An industrial viewpoint. Adv Drug Deliv Rev 2016; 107:289-332. [PMID: 27593265 DOI: 10.1016/j.addr.2016.08.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 08/19/2016] [Accepted: 08/27/2016] [Indexed: 12/16/2022]
Abstract
The design of the first polymeric nanoparticles could be traced back to the 1970s, and has thereafter received considerable attention, as evidenced by the significant increase of the number of articles and patents in this area. This review article is an attempt to take advantage of the existing literature on the clinically tested and commercialized biodegradable PLA(G)A-PEG nanotechnology as a model to propose quality building and outline translation and development principles for polymeric nano-medicines. We built such an approach from various building blocks including material design, nano-assembly - i.e. physicochemistry of drug/nano-object association in the pharmaceutical process, and release in relevant biological environment - characterization and identification of the quality attributes related to the biopharmaceutical properties. More specifically, as envisaged in a translational approach, the reported data on PLA(G)A-PEG nanotechnology have been structured into packages to evidence the links between the structure, physicochemical properties, and the in vitro and in vivo performances of the nanoparticles. The integration of these bodies of knowledge to build the CMC (Chemistry Manufacturing and Controls) quality management strategy and finally support the translation to proof of concept in human, and anticipation of the industrialization takes into account the specific requirements and biopharmaceutical features attached to the administration route. From this approach, some gaps are identified for the industrial development of such nanotechnology-based products, and the expected improvements are discussed. The viewpoint provided in this article is expected to shed light on design, translation and pharmaceutical development to realize their full potential for future clinical applications.
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12
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Nakanishi R, Kinoshita M, Sasaki S, Akiba I. Spatial distribution of hydrophobic compounds in polymer micelles as explored by anomalous small-angle X-ray scattering near Br K-edge. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2015.12.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Shiraishi K, Kawano K, Maitani Y, Aoshi T, Ishii KJ, Sanada Y, Mochizuki S, Sakurai K, Yokoyama M. Exploring the relationship between anti-PEG IgM behaviors and PEGylated nanoparticles and its significance for accelerated blood clearance. J Control Release 2016; 234:59-67. [DOI: 10.1016/j.jconrel.2016.05.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 04/09/2016] [Accepted: 05/05/2016] [Indexed: 10/21/2022]
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14
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Anomalous small-angle X-ray scattering study on the spatial distribution of hydrophobic molecules in polymer micelles. Polym J 2016. [DOI: 10.1038/pj.2016.32] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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15
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Claro de Souza M, Marotta-Oliveira SS, Rocha NHS, Eloy JO, Marchetti JM. Development of a Method to Evaluate the Release Profile of Tamoxifen from Pegylated Hybrid Micelles. J LIQ CHROMATOGR R T 2015. [DOI: 10.1080/10826076.2015.1032418] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Marina Claro de Souza
- College of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paolo, Brazil
| | | | - Nathália Helena Souza Rocha
- College of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paolo, Brazil
| | - Josimar O. Eloy
- College of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paolo, Brazil
| | - Juliana Maldonado Marchetti
- College of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paolo, Brazil
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Shiraishi K, Sanada Y, Mochizuki S, Kawano K, Maitani Y, Sakurai K, Yokoyama M. Determination of polymeric micelles' structural characteristics, and effect of the characteristics on pharmacokinetic behaviors. J Control Release 2015; 203:77-84. [DOI: 10.1016/j.jconrel.2015.02.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 02/06/2015] [Accepted: 02/12/2015] [Indexed: 11/16/2022]
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17
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Kakkar D, Mazzaferro S, Thevenot J, Schatz C, Bhatt A, Dwarakanath BS, Singh H, Mishra AK, Lecommandoux S. Amphiphilic PEO-b
-PBLG Diblock and PBLG-b
-PEO-b
-PBLG Triblock Copolymer Based Nanoparticles: Doxorubicin Loading and In Vitro
Evaluation. Macromol Biosci 2014; 15:124-37. [DOI: 10.1002/mabi.201400451] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 11/06/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Dipti Kakkar
- Université de Bordeaux/Bordeaux-INP; ENSCBP CNRS, Laboratoire de Chimie des Polymères Organiques (UMR5629); 16 avenue Pey Berland 33607 Pessac Cedex France
- Institute of Nuclear Medicine and Allied Sciences; Brig. S.K. Mazumdar Road Timarpur Delhi 110054 India
- Centre for Biomedical Engineering; Indian Institute of Technology; Hauz Khas New Delhi 110016 India
- CNRS; Laboratoire de Chimie des Polymeres Organiques (UMR5629); Pessac France
| | - Silvia Mazzaferro
- Université de Bordeaux/Bordeaux-INP; ENSCBP CNRS, Laboratoire de Chimie des Polymères Organiques (UMR5629); 16 avenue Pey Berland 33607 Pessac Cedex France
- CNRS; Laboratoire de Chimie des Polymeres Organiques (UMR5629); Pessac France
| | - Julie Thevenot
- Université de Bordeaux/Bordeaux-INP; ENSCBP CNRS, Laboratoire de Chimie des Polymères Organiques (UMR5629); 16 avenue Pey Berland 33607 Pessac Cedex France
- CNRS; Laboratoire de Chimie des Polymeres Organiques (UMR5629); Pessac France
| | - Christophe Schatz
- Université de Bordeaux/Bordeaux-INP; ENSCBP CNRS, Laboratoire de Chimie des Polymères Organiques (UMR5629); 16 avenue Pey Berland 33607 Pessac Cedex France
- CNRS; Laboratoire de Chimie des Polymeres Organiques (UMR5629); Pessac France
| | - Anant Bhatt
- Institute of Nuclear Medicine and Allied Sciences; Brig. S.K. Mazumdar Road Timarpur Delhi 110054 India
| | - Bilikere S. Dwarakanath
- Institute of Nuclear Medicine and Allied Sciences; Brig. S.K. Mazumdar Road Timarpur Delhi 110054 India
| | - Harpal Singh
- Centre for Biomedical Engineering; Indian Institute of Technology; Hauz Khas New Delhi 110016 India
| | - Anil K. Mishra
- Institute of Nuclear Medicine and Allied Sciences; Brig. S.K. Mazumdar Road Timarpur Delhi 110054 India
| | - Sebastien Lecommandoux
- Université de Bordeaux/Bordeaux-INP; ENSCBP CNRS, Laboratoire de Chimie des Polymères Organiques (UMR5629); 16 avenue Pey Berland 33607 Pessac Cedex France
- CNRS; Laboratoire de Chimie des Polymeres Organiques (UMR5629); Pessac France
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Zhao P, Dong S, Bhattacharyya J, Chen M. iTEP nanoparticle-delivered salinomycin displays an enhanced toxicity to cancer stem cells in orthotopic breast tumors. Mol Pharm 2014; 11:2703-12. [PMID: 24960465 PMCID: PMC4216230 DOI: 10.1021/mp5002312] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
![]()
Salinomycin
(Sali) has selective toxicity to cancer stem cells
(CSCs), a subpopulation of cancer cells that have been recently linked
with tumor multidrug resistance (MDR). To utilize its selective toxicity
for cancer therapy, we sought to devise a nanoparticle (NP) carrier
to deliver Sali to solid tumors through the enhanced permeability
and retention effect and, hence, to increase its exposure to CSCs.
First, hydrophobic Sali was conjugated to a hydrophilic, immune-tolerant,
elastin-like polypeptide (iTEP); the amphiphilic iTEP–Sali
conjugates self-assemble into NPs. Next, free Sali was encapsulated
into the NPs alone or with two additives, N,N-dimethylhexylamine (DMHA) and α-tocopherol. The
coencapsulation significantly improved the loading efficiency and
release profile of Sali. The resulting NPs of the coencapsulation,
termed as iTEP–Sali NP3s, have an in vitro release half-life of 4.1 h, four times longer than iTEP–Sali
NP2s, the NPs that have encapsulated Sali only. Further, the NP3 formulation
increases the plasma area under curve and the tumor accumulation of
Sali by 10 and 2.4 times, respectively. Lastly, these improved pharmacokinetic
and tumor accumulation profiles are consistent with a boost of CSC-elimination
effect of Sali in vivo. In NP3-treated 4T1 orthotopic
tumors, the mean CSC frequency is 55.62%, a significant reduction
from the mean frequencies of untreated tumors, 75.00%, or free Sali-treated
tumors, 64.32%. The CSC-elimination effect of the NP3 can further
translate to a delay of tumor growth. Given the role of CSCs in driving
tumor MDR and recurrence, it could be a promising strategy to add
the NP3 to conventional cancer chemotherapies to prevent or reverse
the MDR.
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Affiliation(s)
- Peng Zhao
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah , 30S 2000E, Salt Lake City, Utah 84112, United States
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Wang S, Liu S, Mao J, Wen D. Effect of retinoic acid on the tight junctions of the retinal pigment epithelium-choroid complex of guinea pigs with lens-induced myopia in vivo. Int J Mol Med 2014; 33:825-32. [PMID: 24535401 PMCID: PMC3976125 DOI: 10.3892/ijmm.2014.1651] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Accepted: 01/31/2014] [Indexed: 12/13/2022] Open
Abstract
Zonula occludens-1 (ZO-1) and occludin are important tight junction (TJ)-associated proteins, which are expressed in the retinal pigment epithelium (RPE)-choroid complex. Retinoic acid (RA) is a regulator of eye growth and may play an important role in forming functional TJs. The aim of this study was to detect the changes that occur in the expression of ZO-1 and occludin in the RPE-choroid complex of guinea pigs with lens-induced myopia (LIM), and to investigate the effect of RA on TJ-associated proteins in vivo. We developed an animal model of myopia by placing a −6.00 D negative lens on the right eyes of 3-week-old guinea pigs. The refractive error and axial length of the eye were measured on days 0, 3, 7 and 14. High-performance liquid chromatography (HPLC) was performed to detect the changes in endogenous RA in the RPE-choroid complex. The expression of ZO-1 and occludin was observed by immunofluorescence and assayed by western blot analysis. Additionally, 2 μl LE540 (2.5 μg/μl), an antagonist of RA receptors (RARs), was injected into the vitreous chamber of the eyes of guinea pigs with LIM and 2 μl phosphate-buffered saline (PBS) (2.5 μg/μl) were injected as a negative control. We observed no obvious change in RA, ZO-1 and occludin expression in the normal control group within 14 days. In the LIM and LIM plus PBS groups, the level of RA and the expression of ZO-1 and occludin in the RPE-choroid complex significantly increased within 14 days along with the development of myopia. However, the level of RA was inhibited and the expression of TJ-associated proteins decreased in the eyes of guinea pigs with LIM following the injection of LE540. Thus, we consider that the expression of ZO-1 and occludin is increased in the RPE-choroid complex during the development of myopia. This change in expression may be regulated by RA, a factor known to be involved in the regulation of eye growth.
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Affiliation(s)
- Sha Wang
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Shuangzhen Liu
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Junfeng Mao
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Dan Wen
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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Shiraishi K, Yokoyama M. Polymeric micelles possessing polyethyleneglycol as outer shell and their unique behaviors in accelerated blood clearance phenomenon. Biol Pharm Bull 2014; 36:878-82. [PMID: 23727909 DOI: 10.1248/bpb.b13-00085] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Polymeric micelles are assemblies of synthetic polymers and have been studied and developed as drug carriers for targeting. Polymeric micelles are composed of the inner core and the outer shell, and typically form from AB-type block copolymers in which two polymer blocks are connected in a tandem form. Polyethyleneglycol (PEG) has been most commonly used as one polymer block composing the outer shell. This review describes the reasons that PEG is used for the outer shell of the polymeric micelle carrier systems. On the other hand, accelerated blood clearance (ABC) phenomenon is a well-known immunological response of PEG-coated liposomes. Since the ABC phenomenon greatly influences targeting functions of carrier systems, elaborative studies on polymeric micelles' ABC phenomenon have been done, and revealed different behaviors of the polymeric micelle systems from those of PEG-coated liposomes. These studies indicate that polymeric micelle systems are highly feasible tools for contrast agent targeting as well as theranostics.
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Affiliation(s)
- Kouichi Shiraishi
- Medical Engineering Laboratory, Research Center for Medical Science, The Jikei University School of Medicine, Tokyo, Japan
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Niu J, Huang A, Xiao Y, Su Z, Li H, Ping Q, Bao X, Li S, Chen Y, Sun M. Octreotide-mediated tumor cell uptake and intracellular pH-responsive drug delivery of the self-assembly supramolecular nanocarrier. J Drug Target 2013; 21:415-26. [PMID: 23597028 DOI: 10.3109/1061186x.2012.757771] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, DOX-loaded supramolecular nanocarrier (DLSC) was assembled by using two new amphiphilic polymers, octreotide-polyethylene glycol monostearate (OPMS) and N-octyl-N-succinyl O-carboxymethyl chitosan (OSCC). The characteristics of the DLSC were investigated. The results indicated that the significant pH-triggered release in vitro. The cellular uptake of DLSC was much higher than that of DOX-loaded OSCC micelles (DLOM) in the SMMC-7721 (somatostatin receptor (SSTR) over-expressed cell) cells, which suggested the SSTR-mediated properties. A considerable amount of drug entered the nucleus due to the pH-triggered deformation of the supramolecular structure and rapid release of drug in acidic endosomes of tumor cells. The killing efficacy was much higher than that of DLOM in the SMMC-7721. In S180 sarcoma-bearing KM mice, the biodistribution and therapeutic activity were studied. DLSC showed extended circulation time in plasma, decreasing drug concentrations in the heart and accumulating drug concentrations in the pancreas and tumor. In addition, minimized weight changes and cardiac toxicity, high suppression ratio of tumor growth and longer survival time were observed after intravenous injection of DLSC. The studies suggested that the supramolecular nanocarrier constructed of different designated polymers with multiple functions would be one of the most effective approaches for active targeting drug delivery.
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Affiliation(s)
- Jiangxiu Niu
- Department of Pharmacy, China Pharmaceutical University, 24 Tongjia Xiang , Nanjing 210009, PR China
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Hydrophobic blocks of PEG-conjugates play a significant role in the accelerated blood clearance (ABC) phenomenon. J Control Release 2013; 165:183-90. [DOI: 10.1016/j.jconrel.2012.11.016] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 11/12/2012] [Accepted: 11/25/2012] [Indexed: 11/18/2022]
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23
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Hai-wen Z, Li-qun W, Hong-liang J. CHITOSAN-BASED CATIONIC MICELLES FOR CO-INCORPORATION OF TWO TYPES OF DRUGS WITH DISTINCT HYDROPHILICITY. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2012.12115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Mastrotto F, Salmaso S, Alexander C, Mantovani G, Caliceti P. Novel pH-responsive nanovectors for controlled release of ionisable drugs. J Mater Chem B 2013; 1:5335-5346. [DOI: 10.1039/c3tb20360c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Daşkın D, Gündüz U. Preparation and evaluation of polymer based microcarriers for all-trans-retinoic acid. Pharm Dev Technol 2012; 18:1017-25. [DOI: 10.3109/10837450.2011.644296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kitaoka K, Shimizu M, Shimizu N, Chikahisa S, Nakagomi M, Shudo K, Yoshizaki K, Séi H. Retinoic acid receptor antagonist LE540 attenuates wakefulness via the dopamine D1 receptor in mice. Brain Res 2011; 1423:10-6. [PMID: 22000589 DOI: 10.1016/j.brainres.2011.09.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/12/2011] [Accepted: 09/12/2011] [Indexed: 11/18/2022]
Abstract
Vitamin A is a common lipophilic vitamin, and its function is mainly mediated by the binding of its metabolite retinoic acid to retinoic acid receptors (RARs) and retinoid X receptors. Recently, it was reported that the expression of the RARb (an RAR subtype) gene determines the contribution of the delta oscillation in the sleep electroencephalogram (EEG) patterns in mice. We also reported that 4-week dietary deficiency of vitamin A (VAD) causes the attenuation of delta power in sleep and spontaneous activity in mice. However, our previous study could not clarify whether the attenuation of delta power by VAD is attributed to the suppression of RARs. To address this problem, we investigated whether the chronic administration of LE540 (30mg/kg/day), an antagonist of RARs, for 1 or 4weeks attenuated EEG delta power during sleep in mice. Consequently, 4-week LE540 administration induced a significant attenuation of wakefulness and delta power in non-rapid eye movement sleep. Western blot analysis revealed a significant decrease in the expression of dopamine D1 receptor (D1DR) in the striatum and tyrosine hydroxylase in the midbrain of mice that were administered LE540 for 4weeks. High-performance liquid chromatography analysis of striatal tissue revealed a significant decrease in the homovanillic acid/dopamine ratio. Meanwhile, dopamine levels did not change in these mice. Our results suggest that the 4-week antagonism of RARs induces the attenuation of delta power. However, the attenuation of delta power may be elicited indirectly by the decrease of wakefulness followed by the hypo-expression of dopamine receptors especially D1DR.
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Affiliation(s)
- Kazuyoshi Kitaoka
- Department of Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan.
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Modeling drug-carrier interaction in the drug release from nanocarriers. JOURNAL OF DRUG DELIVERY 2011; 2011:370308. [PMID: 21845225 PMCID: PMC3154485 DOI: 10.1155/2011/370308] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 06/15/2011] [Accepted: 06/15/2011] [Indexed: 11/17/2022]
Abstract
Numerous nanocarriers of various compositions and geometries have been developed for the delivery and release of therapeutic and imaging agents. Due to the high specific surface areas of nanocarriers, different mechanisms such as ion pairing and hydrophobic interaction need to be explored for achieving sustained release. Recently, we developed a three-parameter model that considers reversible drug-carrier interaction and first-order drug release from liposomes. A closed-form analytical solution was obtained. Here, we further explore the ability of the model to capture the release of bioactive molecules such as drugs and growth factors from various nanocarriers. A parameter study demonstrates that the model is capable of resembling major categories of drug release kinetics. We further fit the model to 60 sets of experimental data from various drug release systems, including nanoparticles, hollow particles, fibers, and hollow fibers. Additionally, bootstrapping is used to evaluate the accuracy of parameter determination and validate the model in selected cases. The simplicity and universality of the model and the clear physical meanings of each model parameter render the model useful for the design and development of new drug delivery systems.
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Clinical Applications of Polymeric Micelle Carrier Systems in Chemotherapy and Image Diagnosis of Solid Tumors. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.jecm.2011.06.002] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Nita LE, Chiriac AP, Nistor M. An in vitro release study of indomethacin from nanoparticles based on methyl methacrylate/glycidyl methacrylate copolymers. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:3129-3140. [PMID: 21046203 DOI: 10.1007/s10856-010-4171-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 10/18/2010] [Indexed: 05/30/2023]
Abstract
Indomethacin was coupled onto some macromolecular nanostructures based on methyl methacrylate copolymers with glycidyl methacrylate and tested as a model drug. The polymeric matrices were synthesized by radical emulsion copolymerization with and without the presence of a continuous external magnetic field of 1500 Gs intensity. Mathematical analysis of the release data was performed using Higuchi, Peppas-Korsmeyer equations. NIR chemical imaging (NIR-CI) was used to provide information about the spatial distribution of the components in the studied nanostructures. This opportunity was used to visualize the spatial distribution of bioactive substances (indomethacin) into the polymeric matrix, as well as to evaluate the degree of chemical and/or physical heterogeneity of the bioactive samples. The release rate dependence on the synthesis conditions as well as on the chemical compositions of the tested polymeric systems, it was also evidenced.
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Affiliation(s)
- L E Nita
- Petru Poni Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley no. 41A, 700487, Iasi, Romania
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Yokosawa M, Sonoda Y, Sugiyama SI, Saito R, Yamashita Y, Nishihara M, Satoh T, Kumabe T, Yokoyama M, Tominaga T. Convection-enhanced delivery of a synthetic retinoid Am80, loaded into polymeric micelles, prolongs the survival of rats bearing intracranial glioblastoma xenografts. TOHOKU J EXP MED 2010; 221:257-64. [PMID: 20622491 DOI: 10.1620/tjem.221.257] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Prognosis for the patients with glioblastoma, the most common malignant brain tumor, remains dismal. A major barrier to progress in treatment of glioblastoma is the relative inaccessibility of tumors to chemotherapeutic agents. Convection-enhanced delivery (CED) is a direct intracranial drug infusion technique to deliver chemotherapeutic agents to the central nervous system, circumventing the blood-brain barrier and reducing systemic side effects. CED can provide wider distribution of infused agents compared to simple diffusion. We have reported that CED of a polymeric micelle carrier system could yield a clinically relevant distribution of encapsulated agents in the rat brain. Our aim was to evaluate the efficacy of CED of polymeric micellar Am80, a synthetic agonist with high affinity to nuclear retinoic acid receptor, in a rat model of glioblastoma xenografts. We also used systemic administration of temozolomide, a DNA-alkylating agent, which has been established as the standard of care for newly diagnosed malignant glioma. U87MG human glioma cells were injected into the cerebral hemisphere of nude rats. Rats bearing U87MG xenografts were treated with CED of micellar Am80 (2.4 mg/m(2)) on day 7 after tumor implantation. Temozolomide (200 mg/m(2)/day) was intraperitoneally administered daily for 5 days, starting on day 7 after tumor implantation. CED of micellar Am80 provided significantly longer survival than the control. The combination of CED of micellar Am80 and systemic administration of temozolomide provided significantly longer survival than single treatment. In conclusion, temozolomide combined with CED of micellar Am80 may be a promising method for the treatment of malignant gliomas.
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Affiliation(s)
- Michiko Yokosawa
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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Trivedi R, Kompella UB. Nanomicellar formulations for sustained drug delivery: strategies and underlying principles. Nanomedicine (Lond) 2010; 5:485-505. [PMID: 20394539 DOI: 10.2217/nnm.10.10] [Citation(s) in RCA: 236] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Micellar delivery systems smaller than 100 nm can be readily prepared. While micelles allow a great depth of tissue penetration for targeted drug delivery, they usually disintegrate rapidly in the body. Thus, sustained drug delivery from micellar nanocarriers is a challenge. This article summarizes various key strategies and underlying principles for sustained drug delivery using micellar nanocarriers. Comparisons are made with other competing delivery systems such as polymeric microparticles and nanoparticles. Amphiphilic molecules self-assemble in appropriate liquid media to form nanoscale micelles. Strategies for sustained release nanomicellar carriers include use of prodrugs, drug polymer conjugates, novel polymers with low critical micellar concentration or of a reverse thermoresponsive nature, reverse micelles, multi-layer micelles with layer by layer assembly, polymeric films capable of forming micelles in vivo and micelle coats on a solid support. These new micellar systems are promising for sustained drug delivery.
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Affiliation(s)
- Ruchit Trivedi
- Department of Pharmaceutical Sciences, University of Colorado Denver, 12700 E 19th Avenue, C238-P15, Aurora, CO 80045, USA
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Yokoyama M. Polymeric micelles as a new drug carrier system and their required considerations for clinical trials. Expert Opin Drug Deliv 2010; 7:145-58. [PMID: 20095939 DOI: 10.1517/17425240903436479] [Citation(s) in RCA: 177] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IMPORTANCE OF THE FIELD A polymeric micelle is a macromolecular assembly composed of an inner core and an outer shell, and most typically is formed from block copolymers. In the last two decades, polymeric micelles have been actively studied as a new type of drug carrier system, in particular for drug targeting of anticancer drugs to solid tumors. AREAS COVERED IN THIS REVIEW In this review, polymeric micelle drug carrier systems are discussed with a focus on toxicities of the polymeric micelle carrier systems and on pharmacological activities of the block copolymers. In the first section, the importance of the above-mentioned evaluation of these properties is explained, as this importance does not seem to be well recognized compared with the importance of targeting and enhanced pharmacological activity of drugs, particularly in the basic studies. Then, designs, types and classifications of the polymeric micelle system are briefly summarized and explained, followed by a detailed discussion regarding several examples of polymeric micelle carrier systems. WHAT THE READER WILL GAIN Readers will gain a strategy of drug delivery with polymeric carriers as well as recent progress of the polymeric micelle carrier systems in their basic studies and clinical trials. TAKE HOME MESSAGE The purpose of this review is to achieve tight connections between the basic studies and clinical trials.
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Affiliation(s)
- Masayuki Yokoyama
- Jikei University School of Medicine, Research Center for Medical Science, Medical Engineering Laboratory, 3-25-8, Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan.
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Hu H, Yu L, Tan S, Tu K, Wang LQ. Novel complex hydrogels based on N-carboxyethyl chitosan and quaternized chitosan and their controlled in vitro protein release property. Carbohydr Res 2010; 345:462-8. [DOI: 10.1016/j.carres.2009.11.029] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 11/24/2009] [Accepted: 11/27/2009] [Indexed: 11/25/2022]
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