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Acharya B, Behera A, Behera S, Moharana S. Recent Advances in Nanotechnology-Based Drug Delivery Systems for the Diagnosis and Treatment of Reproductive Disorders. ACS APPLIED BIO MATERIALS 2024; 7:1336-1361. [PMID: 38412066 DOI: 10.1021/acsabm.3c01064] [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] [Indexed: 02/29/2024]
Abstract
Over the past decade, nanotechnology has seen extensive integration into biomedical applications, playing a crucial role in biodetection, drug delivery, and diagnostic imaging. This is especially important in reproductive health care, which has become an emerging and significant area of research. Global concerns have intensified around disorders such as infertility, endometriosis, ectopic pregnancy, erectile dysfunction, benign prostate hyperplasia, sexually transmitted infections, and reproductive cancers. Nanotechnology presents promising solutions to address these concerns by introducing innovative tools and techniques, facilitating early detection, targeted drug delivery, and improved imaging capabilities. Through the utilization of nanoscale materials and devices, researchers can craft treatments that are not only more precise but also more effective, significantly enhancing outcomes in reproductive healthcare. Looking forward, the future of nanotechnology in reproductive medicine holds immense potential for reshaping diagnostics, personalized therapies, and fertility preservation. The utilization of nanotechnology-driven drug delivery systems is anticipated to elevate treatment effectiveness, minimize side effects, and offer patients therapies that are not only more precise but also more efficient. This review aims to delve into the various types, properties, and preparation techniques of nanocarriers specifically designed for drug delivery in the context of reproductive disorders, shedding light on the current landscape and potential future directions in this dynamic field.
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Affiliation(s)
- Biswajeet Acharya
- School of Pharmacy and Life Sciences, Centurion University of Technology and Management, Bhubaneswar, Odisha 752050, India
| | - Amulyaratna Behera
- School of Pharmacy and Life Sciences, Centurion University of Technology and Management, Bhubaneswar, Odisha 752050, India
| | | | - Srikanta Moharana
- Department of Chemistry, School of Applied Sciences, Centurion University of Technology and Management, Bhubaneswar, Odisha 752050, India
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Suhail M, Chiu IH, Hung MC, Vu QL, Lin IL, Wu PC. In Vitro Evaluation of Smart and pH-Sensitive Chondroitin Sulfate/Sodium Polystyrene Sulfonate Hydrogels for Controlled Drug Delivery. Gels 2022; 8:gels8070406. [PMID: 35877491 PMCID: PMC9323728 DOI: 10.3390/gels8070406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 12/04/2022] Open
Abstract
Ibuprofen is an antipyretic and analgesic drug used for the management of different inflammatory diseases, such as rheumatoid arthritis and osteoarthritis. Due to a short half-life and rapid elimination, multiple doses of ibuprofen are required in a day to maintain pharmacological action for a long duration of time. Due to multiple intakes of ibuprofen, certain severe adverse effects, such as gastric irritation, bleeding, ulcers, and abdominal pain are produced. Therefore, a system is needed which not only prolongs the release of ibuprofen but also overcomes the drug’s adverse effects. Hence, the authors have synthesized chondroitin sulfate/sodium polystyrene sulfonate–co-poly(acrylic acid) hydrogels by the free radical polymerization technique for the controlled release of ibuprofen. Sol-gel, porosity, swelling, and drug release studies were performed on the fabricated hydrogel. The pH-responsive behavior of the fabricated hydrogel was determined by both swelling and drug release studies in three different pH values, i.e., pH 1.2, 4.6, and 7.4. Maximum swelling and drug release were observed at pH 7.4, as compared to pH 4.6 and 1.2. Similarly, the structural arrangement and crosslinking of the hydrogel contents were confirmed by Fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) evaluated the hard and irregular surface with a few macrospores of the developed hydrogel, which may be correlated with the strong crosslinking of polymers with monomer content. Similarly, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) demonstrated the high thermal stability of the formulated hydrogel, as compared to pure polymers. A decrease in the crystallinity of chondroitin sulfate and sodium polystyrene sulfonate after crosslinking was revealed by powder X-ray diffraction (PXRD). Thus, considering the results, we can demonstrate that a developed polymeric network of hydrogel could be used as a safe, stable, and efficient carrier for the controlled release of ibuprofen.
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Affiliation(s)
- Muhammad Suhail
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan; (M.S.); (I.-H.C.); (M.-C.H.)
| | - I-Hui Chiu
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan; (M.S.); (I.-H.C.); (M.-C.H.)
| | - Ming-Chia Hung
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan; (M.S.); (I.-H.C.); (M.-C.H.)
| | - Quoc Lam Vu
- Department of Clinical Pharmacy, Thai Nguyen University of Medicine and Pharmacy, 284 Luong Ngoc Quyen Str., Thai Nguyen City 24000, Vietnam;
| | - I-Ling Lin
- Department of Medicine Laboratory Science and Biotechnology, College of Health Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Pao-Chu Wu
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan; (M.S.); (I.-H.C.); (M.-C.H.)
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Correspondence: ; Tel.: +886-7-3121101
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Choi Y, Kim J, Yu S, Hong S. pH- and temperature-responsive radially porous silica nanoparticles with high-capacity drug loading for controlled drug delivery. NANOTECHNOLOGY 2020; 31:335103. [PMID: 32369797 DOI: 10.1088/1361-6528/ab9043] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The design of smart and functional nanocarriers for drug delivery systems that use a variety of organic and inorganic materials has led to the development of nanomedicines with improved therapeutic efficiency and reduced side effects. In this study, a pH- and temperature-responsive, controlled-release system with a high capacity for drug loading was developed based on radially porous silica nanoparticles composed of functionalized ligands and polymer encapsulation. This drug delivery system uses radially oriented mesoporous silica nanoparticles as the drug carrier, and control of the surface chemistry of those nanocarriers allows high-capacity loading efficiency of target drugs and stimuli-responsive release kinetics governed by pH and temperature. The delivery of ibuprofen was chosen to test this system, and a maximum loading efficiency of ca. 270 wt% was established, which was 3 times greater than that in previous studies for silica nanoparticles such as SBA-15, MCA-41, and MCM-48. In addition, the pH- and temperature-responsive release of ibuprofen was achieved when the surface of the nanocarriers was treated by pH-responsive amine functionalization and a temperature-responsive surface coating of agarose gel. Finally, cytotoxicity testing using the fibroblast cells showed that the developed silica nanocarriers have no toxicity on the cells, which should allow these nanocarriers to be applied as a nanomedicine in drug delivery systems.
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Affiliation(s)
- Youngbo Choi
- Department of Safety Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
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Anuar N, Sabri AH, Bustami Effendi TJ, Abdul Hamid K. Development and characterisation of ibuprofen-loaded nanoemulsion with enhanced oral bioavailability. Heliyon 2020; 6:e04570. [PMID: 32775730 PMCID: PMC7394867 DOI: 10.1016/j.heliyon.2020.e04570] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 07/14/2020] [Accepted: 07/23/2020] [Indexed: 02/06/2023] Open
Abstract
Lipophilic compounds constitute a majority of therapeutics in the pipeline of drug discovery. Despite possessing enhanced efficacy and permeability, some of these drugs suffer poor solubility necessitating the need of a suitable drug delivery system. Nanoemulsion is a drug delivery system that provides enhanced solubility for poorly soluble drugs in an attempt to improve the oral bioavailability. The purpose of this study is to develop a nanoemulsion system using ibuprofen as a model drug in order to investigate the potential of this colloidal system to enhance the absorption of poorly water-soluble drugs. Ibuprofen loaded-nanoemulsion with different drug concentrations (1.5, 3 and 6% w/w) were formulated from olive oil, sucrose ester L-1695 and glycerol using D-phase emulsification technique. A pseudoternary phase diagram was utilised to identify the optimal excipient composition to formulate the nanoemulsion system. In vitro diffusion chamber studies using rodent intestinal linings highlighted improved absorption profile when ibuprofen was delivered as nanoemulsion in comparison to microemulsions and drug-in-oil systems. This was further corroborated by in vivo studies using rat model that highlighted a two-fold increase in ibuprofen absorption when the drug was administered as a nanoemulsion relative to drug-in-oil system. On the other hand, when ibuprofen was administered as microemulsions, only a 1.5-fold increase in absorption was observed relative to drug-in-oil system. Thus, this study highlights the potential of using nanoemulsion as a drug delivery system to enhance the oral bioavailability of hydrophobic drugs.
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Affiliation(s)
- Nurfazreen Anuar
- Department of Pharmaceutics, Faculty of Pharmacy, Universiti Teknologi MARA, Cawangan Selangor, 42300 Puncak Alam, Selangor, Malaysia
| | - Akmal H. Sabri
- Advanced Materials and Healthcare Technologies Group, School of Pharmacy, The University of Nottingham, NG7 2RD, Nottingham, UK
| | - Tommy Julianto Bustami Effendi
- Department of Pharmaceutics, Faculty of Pharmacy, Universiti Teknologi MARA, Cawangan Selangor, 42300 Puncak Alam, Selangor, Malaysia
| | - Khuriah Abdul Hamid
- Department of Pharmaceutics, Faculty of Pharmacy, Universiti Teknologi MARA, Cawangan Selangor, 42300 Puncak Alam, Selangor, Malaysia
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Hassouna F, Abo El Dahab M, Fulem M, De Lima Haiek A, Laachachi A, Kopecký D, Šoóš M. Multi-scale analysis of amorphous solid dispersions prepared by freeze drying of ibuprofen loaded acrylic polymer nanoparticles. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101182] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Irvine J, Afrose A, Islam N. Formulation and delivery strategies of ibuprofen: challenges and opportunities. Drug Dev Ind Pharm 2017; 44:173-183. [PMID: 29022772 DOI: 10.1080/03639045.2017.1391838] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Ibuprofen, a non-steroidal anti-inflammatory drug (NSAID), is mostly administered orally and topically to relieve acute pain and fever. Due to its mode of action this drug may be useful in the treatment regimens of other, more chronic conditions, like cystic fibrosis. This drug is poorly soluble in aqueous media and thus the rate of dissolution from the currently available solid dosage forms is limited. This leads to poor bioavailability at high doses after oral administration, thereby increasing the risk of unwanted adverse effects. The poor solubility is a problem for developing injectable solution dosage forms. Because of its poor skin permeability, it is difficult to obtain an effective therapeutic concentration from topical preparations. This review aims to give a brief insight into the status of ibuprofen dosage forms and their limitations, particle/crystallization technologies for improving formulation strategies as well as suggesting its incorporation into the pulmonary drug delivery systems for achieving better therapeutic action at low dose.
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Affiliation(s)
- Jake Irvine
- a Pharmacy Discipline, School of Clinical Sciences, Faculty of Health , Queensland University of Technology , Brisbane , QLD , Australia
| | - Afrina Afrose
- a Pharmacy Discipline, School of Clinical Sciences, Faculty of Health , Queensland University of Technology , Brisbane , QLD , Australia.,b Institute of Health and Biomedical Innovation , Queensland University of Technology , Brisbane , QLD , Australia
| | - Nazrul Islam
- a Pharmacy Discipline, School of Clinical Sciences, Faculty of Health , Queensland University of Technology , Brisbane , QLD , Australia.,b Institute of Health and Biomedical Innovation , Queensland University of Technology , Brisbane , QLD , Australia
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Guo Y, Sun J, Bai S, Wu X. pH-Sensitive performance of dextran–poly(acrylic acid) copolymer and its application in controlled in vitro release of ibuprofen. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2017.1291509] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yueyue Guo
- Department of Chemistry and Chemical Engineering, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, P. R. China
| | - Jihong Sun
- Department of Chemistry and Chemical Engineering, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, P. R. China
| | - Shiyang Bai
- Department of Chemistry and Chemical Engineering, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, P. R. China
| | - Xia Wu
- Department of Chemistry and Chemical Engineering, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, P. R. China
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Obaidat R, Alnaief M, Jaeger P. Significant solubility of carbon dioxide in Soluplus ® facilitates impregnation of ibuprofen using supercritical fluid technology. Pharm Dev Technol 2017; 23:697-705. [PMID: 28375669 DOI: 10.1080/10837450.2017.1315135] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Treatment of Soluplus® with supercritical carbon dioxide allows promising applications in preparing dispersions of amorphous solids. Several characterization techniques were employed to reveal this effect, including CO2 gas sorption under high pressure and physicochemical characterizations techniques. A gravimetric method was used to determine the solubility of carbon dioxide in the polymer at elevated pressure. The following physicochemical characterizations were used: thermal analysis, X-ray diffraction, Fourier transform, infrared spectroscopy and scanning electron microscopy. Drug loading of the polymer with ibuprofen as a model drug was also investigated. The proposed treatment with supercritical carbon dioxide allows to prepare solid solutions of Soluplus® in less than two hours at temperatures that do not exceed 45 °C, which is a great advantage to be used for thermolabile drugs. The advantages of using this technology for Soluplus® formulations lies behind the high sorption capability of carbon dioxide inside the polymer. This will ensure rapid diffusion of the dissolved/dispersed drug inside the polymer under process conditions and rapid precipitation of the drug in the amorphous form during depressurization accompanied by foaming of the polymer.
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Affiliation(s)
- Rana Obaidat
- a Pharmaceutical Technology , Jordan University of Science and Technology , Irbid , Jordan
| | | | - Philip Jaeger
- c Technische Universitat Hamburg-Harburg , Hamburg , Germany
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Babanejad N, Farhadian A, Omrani I, Nabid MR. Design, characterization and in vitro evaluation of novel amphiphilic block sunflower oil-based polyol nanocarrier as a potential delivery system: Raloxifene-hydrochloride as a model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:59-68. [PMID: 28576026 DOI: 10.1016/j.msec.2017.03.235] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 01/08/2017] [Accepted: 03/25/2017] [Indexed: 01/09/2023]
Abstract
Presently, modern pharmaceuticals, are almost exclusively derived from the arduous refining of petroleum whose supply is inherently unsustainable. In order to address this issue bio-based materials are increasingly being used for chemical synthesis, particularly in drug delivery systems. Biodegradable and biocompatible hyper-branched polyol (an alcohol containing three or more hydroxyl groups) was synthesized via a facile method through the ring-opening and thiol-ene click reactions at room temperature. Due to the bio-based content of the polyol backbone, the synthesized polyol had both excellent biodegradability and low cytotoxicity. Raloxifene hydrochloride, an oral selective estrogen receptor modulator, was used as a hydrophobic drug model to test the potential of polyol as a drug delivery system carrier. Polyol showed an amphiphilic character and could be prepared as a nanoparticle for the sustained delivery of raloxifene hydrochloride, a drug with poor bioavailability in aqueous solution. Raloxifene hydrochloride was readily encapsulated in the lipophilic core of polyol whose branched hydroxyls were on the external part of the prepared nanoparticles. The diameter of the nanoparticles was 94±0.43nm, their drug entrapment efficiency was 93±0.5% and they showed a sustained release profile (17±1.5% after 4weeks). The 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay showed low toxicity towards human osteoblast MG-63 cells. Based on its good biodegradability and low cytotoxicity, polyol provides a bio-based source for the design new drug delivery systems.
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Affiliation(s)
- Niloofar Babanejad
- Department of Polymer, Faculty of Chemistry, Shahid Beheshti University, G.C, 1983963113, Tehran, Iran
| | - Abdolreza Farhadian
- Department of Polymer, Faculty of Chemistry, Shahid Beheshti University, G.C, 1983963113, Tehran, Iran
| | - Ismail Omrani
- Department of Polymer, Faculty of Chemistry, Shahid Beheshti University, G.C, 1983963113, Tehran, Iran
| | - Mohammad Reza Nabid
- Department of Polymer, Faculty of Chemistry, Shahid Beheshti University, G.C, 1983963113, Tehran, Iran.
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Duxfield L, Sultana R, Wang R, Englebretsen V, Deo S, Swift S, Rupenthal I, Al-Kassas R. Development of gatifloxacin-loaded cationic polymeric nanoparticles for ocular drug delivery. Pharm Dev Technol 2015; 21:172-9. [PMID: 26794936 DOI: 10.3109/10837450.2015.1091839] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The present investigation aimed at improving the ocular bioavailability of gatifloxacin by prolonging its residence time in the eye and reducing problems associated with the drug re-crystallization after application through incorporation into cationic polymeric nanoparticles. Gatifloxacin-loaded nanoparticles were prepared via the nanoprecipitation and double emulsion techniques. A 50:50 Eudragit® RL and RS mixture was used as cationic polymer with other formulation parameters varied. Prepared nanoparticles were evaluated for size, zeta potential, and drug loading. An optimized formulation was selected and further characterized for in vitro drug release, cytotoxicity, and antimicrobial activity. The double emulsion method produced larger nanoparticles than the nanoprecipitation method (410 nm and 68 nm, respectively). Surfactant choice also affected particle size and zeta potential with Tween 80 producing smaller-sized particles with higher zeta potential than PVA. However, the zeta potential was positive at all experimental conditions investigated. The optimal formulation produced by double emulsion technique and has achieved 46% drug loading. This formulation had optimal physicochemical properties with acceptable cytotoxicity results, and very prolonged release rate. The particles antimicrobial activities of the selected formulation have been tested against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus and showed prolonged antimicrobial effect for gatifloxacin.
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Affiliation(s)
- Linda Duxfield
- a Faculty of Medical and Health Sciences , School of Pharmacy, The University of Auckland , Auckland , New Zealand
| | - Rubab Sultana
- a Faculty of Medical and Health Sciences , School of Pharmacy, The University of Auckland , Auckland , New Zealand
| | - Ruokai Wang
- a Faculty of Medical and Health Sciences , School of Pharmacy, The University of Auckland , Auckland , New Zealand
| | - Vanessa Englebretsen
- a Faculty of Medical and Health Sciences , School of Pharmacy, The University of Auckland , Auckland , New Zealand
| | - Samantha Deo
- a Faculty of Medical and Health Sciences , School of Pharmacy, The University of Auckland , Auckland , New Zealand
| | - Simon Swift
- c Department of Molecular Medicine and Pathology , Faculty of Medical and Health Sciences, University of Auckland , Auckland , New Zealand
| | - Ilva Rupenthal
- b Buchanan Ocular Therapeutics Unit, Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, University of Auckland , Auckland , New Zealand , and
| | - Raida Al-Kassas
- a Faculty of Medical and Health Sciences , School of Pharmacy, The University of Auckland , Auckland , New Zealand
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Turovsky T, Portnaya I, Kesselman E, Ionita-Abutbul I, Dan N, Danino D. Effect of temperature and loading on the structure of β-casein/ibuprofen assemblies. J Colloid Interface Sci 2015; 449:514-21. [DOI: 10.1016/j.jcis.2015.02.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 02/10/2015] [Accepted: 02/10/2015] [Indexed: 01/07/2023]
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Claeys B, Vandeputte R, De Geest BG, Remon JP, Vervaet C. pH-independent immediate release polymethacrylate formulations--an observational study. Drug Dev Ind Pharm 2015; 42:578-83. [PMID: 26095597 DOI: 10.3109/03639045.2015.1057151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Using Eudragit® E PO (EudrE) as a polymethacrylate carrier, the aim of the study was to develop a pH-independent dosage form containing ibuprofen (IBP) as an active compound via chemical modification of the polymer (i.e. quaternization of amine function) or via the addition of dicarboxylic acids (succinic, glutaric and adipic acid) to create a pH micro-environment during dissolution. Biconvex tablets (diameter: 10 mm; height: 5 mm) were produced via hot melt extrusion and injection molding. In vitro dissolution experiments revealed that a minimum of 25% of quaternization was sufficient to partially (up to pH 5) eliminate the pH-dependent effect of the EudrE/IBP formulation. The addition of dicarboxylic acids did not alter IBP release in a pH 1 and 3 medium as the dimethyl amino groups of EudrE are already fully protonated, while in a pH 5 solvent IBP release was significantly improved (cf. from 0% to 92% release after 1 h dissolution experiments upon the addition of 20 wt.% succinic acid). Hence, both approaches resulted in a pH-independent (up to pH 5) immediate release formulation. However, the presence of a positively charged polymer induced stability issues (recrystallization of API) and the formulations containing dicarboxylic acids were classified as mechanically unstable. Hence, further research is needed to obtain a pH-independent immediate release formulation while using EudrE as a polmethacrylate carrier.
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Affiliation(s)
- Bart Claeys
- a Laboratory of Pharmaceutical Technology and
| | | | - Bruno G De Geest
- b Biopharmaceutical Technology Unit , Department of Pharmaceutics, Ghent University , Ghent , Belgium
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Controlled Electrostatic Self-Assembly of Ibuprofen-Cationic Dextran Nanoconjugates Prepared by low Energy Green Process – a Novel Delivery Tool for Poorly Soluble Drugs. Pharm Res 2014; 32:2110-31. [DOI: 10.1007/s11095-014-1603-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 12/09/2014] [Indexed: 11/26/2022]
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14
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Abrego G, Alvarado HL, Egea MA, Gonzalez-Mira E, Calpena AC, Garcia ML. Design of Nanosuspensions and Freeze-Dried PLGA Nanoparticles as a Novel Approach for Ophthalmic Delivery of Pranoprofen. J Pharm Sci 2014; 103:3153-64. [DOI: 10.1002/jps.24101] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 06/23/2014] [Accepted: 07/03/2014] [Indexed: 11/10/2022]
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Abioye AO, Kola-Mustapha A, Ruparelia K. Impact of in situ granulation and temperature quenching on crystal habit and micromeritic properties of ibuprofen-cationic dextran conjugate crystanules. Int J Pharm 2014; 462:83-102. [DOI: 10.1016/j.ijpharm.2013.12.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 12/18/2013] [Accepted: 12/21/2013] [Indexed: 11/16/2022]
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Novel continuous flow technology for the development of a nanostructured aprepitant formulation with improved pharmacokinetic properties. Eur J Pharm Biopharm 2013; 86:361-8. [PMID: 24161498 DOI: 10.1016/j.ejpb.2013.10.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 08/27/2013] [Accepted: 10/11/2013] [Indexed: 11/23/2022]
Abstract
The oral bioavailability of Aprepitant is limited by poor dissolution of the compound in the gastrointestinal tract which is more prominent in the fasted state resulting in significant positive food effect. Due to the low aqueous solubility of the active substance the product development has been focused on decreasing the particle size of the active compound down to the submicron range in order to overcome this disadvantageous pharmacokinetic property. The marketed drug consisting of wet-milled nanocrystals exhibits significantly higher oral bioavailability in the fasted state and reduced food effect when compared to the unformulated compound. We have developed a novel process for the production of a nanostructured Aprepitant formulation in which the generation of the nanosized particles takes place at molecular level. The process relies on controlled continuous flow precipitation of the compound from its solution in the presence of stabilizers. The precise control of the production parameters (mixing geometry, flow rates, temperature, etc.) allows to tailor the physicochemical properties and biological performance of the active compound. We have prepared a novel nanostructured Aprepitant formulation using this method and compared its physicochemical and pharmacokinetic properties with the reference compound and the marketed nanoformula. We found that our method produces a stable amorphous solid form comprising novel nanostructured particles having a particle size of less than 100 nm with instantaneous redispersibility characteristics and improved apparent solubility and permeability. In vivo beagle dog pharmacokinetic studies showed that the novel formula exhibited greatly improved pharmacokinetic characteristics when compared to the reference compound, while serum blood concentrations for the nanostructured formula and the wet-milled formula were similar. The marked food effect observed for the reference compound was practically eliminated by our formulation method. These results indicate that the novel continuous flow precipitation technology is a suitable tool to prepare nanostructured formulations with similar, or even superior in vitro and in vivo characteristics when compared to the industrial standard milling technology.
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Babanejad N, Nikjeh MMA, Amini M, Dorkoosh FA. A nanoparticulate raloxifene delivery system based on biodegradable carboxylated polyurethane: Design, optimization, characterization, andin vitroevaluation. J Appl Polym Sci 2013. [DOI: 10.1002/app.39668] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Niloofar Babanejad
- Chemistry Department; Faculty of Science, Imam Khomeini International University; Qazvin Iran
| | | | - Mohsen Amini
- Department of Medicinal Chemistry; Faculty of Pharmacy, Tehran University of Medical Sciences; Tehran Iran
| | - Farid A. Dorkoosh
- Department of Pharmaceutics; Faculty of Pharmacy, Tehran University of Medical Sciences; Tehran Iran
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Vieira AP, Badshah S, Airoldi C. Ibuprofen-loaded chitosan and chemically modified chitosans--release features from tablet and film forms. Int J Biol Macromol 2012; 52:107-15. [PMID: 23010457 DOI: 10.1016/j.ijbiomac.2012.09.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 09/10/2012] [Accepted: 09/15/2012] [Indexed: 11/30/2022]
Abstract
The biopolymer chitosan was chemically modified in two sequences of reactions: (i) immobilization of methyl acrylate followed by cysteamine and (ii) the sequence of immobilization reactions involving ethylene sulfide, methyl acrylate and finally cysteamine. In both cases the pendant chains have attached nitrogen, oxygen and sulfur basic centers. The corresponding structures were characterized through elemental analysis, infrared spectroscopy, nuclear magnetic resonance in the solid state for carbon, thermogravimetry and scanning electron microscopy. The newly synthesized biopolymers have abilities to immobilize and controllably release the non-steroidal drug ibuprofen. The ibuprofen-loaded biomaterials as tablets or as films crosslinked with glutaraldehyde revealed that drug release is pH sensitive. The chemically modified chitosan may allow reduction of drug release in stomach fluids, since the functional groups cause a decrease in swelling rate at pH 1.2, opposite to the behavior that occurs at pH 7.4, that of nutritional fluid, where an increase of the rate of swelling occurs. In such conditions the negatively charge ibuprofen is electrostatically repelled by negative chitosan derivative surfaces.
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Affiliation(s)
- Adriana P Vieira
- Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-971 Campinas, SP, Brazil
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20
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Encapsulated curcumin results in prolonged curcumin activity in vitro and radical scavenging activity ex vivo on skin after UVB-irradiation. Eur J Pharm Biopharm 2012; 82:485-90. [PMID: 22954772 DOI: 10.1016/j.ejpb.2012.08.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Revised: 07/20/2012] [Accepted: 08/21/2012] [Indexed: 12/18/2022]
Abstract
The phytochemical curcumin possesses antioxidant activity; however, it becomes unstable after being exposed to light or heat or loses activity during storage. This is especially important when curcumin is applied to the skin within a cosmetic or pharmaceutical formulation, since sun exposure is unavoidable. This drawback can be directly addressed by encapsulation of curcumin in photo-stable nanospheres. Therefore, curcumin was encapsulated into nanoparticles consisting of ethyl cellulose and/or methyl cellulose. Nanoparticles were subjected to processing conditions commonly used in industry, for example, temperature and pressure and thus retained their morphology. Furthermore, sun exposure resulted in the protection of curcumin by nanoparticles, whereas non-encapsulated curcumin degraded completely. Determination of the radical protection factor resulted in similar antioxidant activity of encapsulated and non-encapsulated curcumin indicating that curcumin maintains its antioxidant activity. Application of lotions containing curcumin or curcumin nanoparticles to the skin and subsequent UVB-irradiation resulted in less radical formation compared to lotion application only. Moreover, radical formation was even less after nanoparticle application compared to free curcumin. Nanoencapsulation protects curcumin from photo degradation and can therefore prolong the antioxidant activity of curcumin.
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Moribe K, Limwikrant W, Higashi K, Yamamoto K. Structural evaluation of probucol nanoparticles in water by atomic force microscopy. Int J Pharm 2012; 427:365-71. [DOI: 10.1016/j.ijpharm.2012.02.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/20/2012] [Accepted: 02/10/2012] [Indexed: 11/29/2022]
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Functionalized (poly(ɛ-caprolactone))2-poly(ethylene glycol) nanoparticles with grafting nicotinic acid as drug carriers. Int J Pharm 2012; 423:562-70. [DOI: 10.1016/j.ijpharm.2011.11.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Revised: 10/30/2011] [Accepted: 11/23/2011] [Indexed: 11/21/2022]
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Suksiriworapong J, Sripha K, Kreuter J, Junyaprasert VB. Investigation of Polymer and Nanoparticle Properties with Nicotinic Acid and p-Aminobenzoic Acid Grafted on Poly(ε-caprolactone)-Poly(ethylene glycol)-Poly(ε-caprolactone) via Click Chemistry. Bioconjug Chem 2011; 22:582-94. [DOI: 10.1021/bc100270m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Jörg Kreuter
- Institute of Pharmaceutical Technology, Goethe-University, Max-von-Laue-Str. 9 (Biozentrum), D-60438 Frankfurt am Main, Germany
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Arias JL, Reddy LH, Othman M, Gillet B, Desmaële D, Zouhiri F, Dosio F, Gref R, Couvreur P. Squalene based nanocomposites: a new platform for the design of multifunctional pharmaceutical theragnostics. ACS NANO 2011; 5:1513-21. [PMID: 21275408 DOI: 10.1021/nn1034197] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study reports the design of a novel theragnostic nanomedicine which combines (i) the ability to target a prodrug of gemcitabine to an experimental solid tumor under the influence of a magnetic field with (ii) the imaging of the targeted tumoral nodule. This concept is based on the inclusion of magnetite nanocrystals into nanoparticles (NPs) constructed by self-assembling molecules of the squalenoyl gemcitabine (SQgem) bioconjugate. The nanocomposites are characterized by an unusually high drug loading, a significant magnetic susceptibility, and a low burst release. When injected to the L1210 subcutaneous mice tumor model, these magnetite/SQgem NPs were magnetically guided, and they displayed considerably greater anticancer activity than the other anticancer treatments (magnetite/SQgem NPs nonmagnetically guided, SQgem NPs, or gemcitabine free in solution). The histology and immunohistochemistry investigation of the tumor biopsies clearly evidenced the therapeutic superiority of the magnetically guided nanocomposites, while Prussian blue staining confirmed their accumulation at the tumor periphery. The superior therapeutic activity and enhanced tumor accumulation has been successfully visualized using T(2)-weighted imaging in magnetic resonance imaging (MRI). This concept was further enlarged by (i) the design of squalene-based NPs containing the T(1) Gd(3+) contrast agent instead of magnetite and (ii) the application to other anticancer squalenoyls, such as, cisplatin, doxorubicin, and paclitaxel. Thus, by combining different anticancer medicines as well as contrast imaging agents in NPs, we open the door toward generic conceptual framework for cancer treatment and diagnosis. This new theragnostic nanotechnology platform is expected to have important applications in cancer therapy.
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Affiliation(s)
- José L Arias
- Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Granada, 18071-Granada, Spain
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25
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Abstract
Esterification of xylan with ibuprofen via activiation of the carboxylic acid with N,N'-carbonyldiimidazole (CDI) yields products of high drug loadings. Subsequent sulfation of xylan ibuprofen esters using the gentle agent SO(3)/DMF was successfully carried out in order to modify hydrophobicity of the xylan esters. The structure of the novel xylan esters was evaluated by means of NMR spectroscopy. The resulting xylan derivatives self assemble into spherical nanoparticles with mean diameters ranging from 162 to 472 nm. Preliminary stability measurements indicate that hydrolytic stability decreases with increase in degree of substitution of sulfate groups. Thus, a new concept toward improved drug delivery from polysaccharide-based nanoparticles can be established here.
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Affiliation(s)
- Stephan Daus
- Center of Excellence for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany
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Mao Z, Wan L, Hu L, Ma L, Gao C. Tat peptide mediated cellular uptake of SiO2 submicron particles. Colloids Surf B Biointerfaces 2010; 75:432-40. [DOI: 10.1016/j.colsurfb.2009.09.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2009] [Revised: 08/16/2009] [Accepted: 09/15/2009] [Indexed: 10/20/2022]
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Sheikh Hassan A, Sapin A, Lamprecht A, Emond E, El Ghazouani F, Maincent P. Composite microparticles with in vivo reduction of the burst release effect. Eur J Pharm Biopharm 2009; 73:337-44. [DOI: 10.1016/j.ejpb.2009.07.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 07/16/2009] [Accepted: 07/28/2009] [Indexed: 10/20/2022]
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Li J, Yao P. Self-assembly of ibuprofen and bovine serum albumin-dextran conjugates leading to effective loading of the drug. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:6385-6391. [PMID: 19371045 DOI: 10.1021/la804288u] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A simple and green process of simultaneous formation of albumin nanoparticles and encapsulation of hydrophobic drugs in aqueous solution was developed. Bovine serum albumin (BSA)-dextran conjugates were prepared through the Maillard reaction. Ibuprofen was used as a drug model. The solubility of protonated ibuprofen decreases, and then precipitation occurs when the pH of saturated ibuprofen solution is changed from alkali to acidic value. In the presence of the conjugates, a binding of ibuprofen with BSA through hydrophobic and electrostatic interactions can suppress the precipitation of ibuprofen. After a heat treatment, the gelation of BSA results in the formation of nanoparticles and fixing of the ibuprofen in the core. The nanoparticles were characterized with dynamic and static light scattering, zeta-potential, and transmission electron microscopy. The nanoparticles are of spherical shape having a hydrodynamic diameter of about 70 nm. As much as 0.7 unit weight of ibuprofen can be loaded into one unit weight of the conjugates. The dextran conjugated to BSA stabilizes the nanoparticles in aqueous solution.
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Affiliation(s)
- Juan Li
- Key Laboratory of Molecular Engineering of Polymer and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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Hornig S, Bunjes H, Heinze T. Preparation and characterization of nanoparticles based on dextran-drug conjugates. J Colloid Interface Sci 2009; 338:56-62. [PMID: 19635622 DOI: 10.1016/j.jcis.2009.05.025] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2009] [Revised: 05/04/2009] [Accepted: 05/05/2009] [Indexed: 11/16/2022]
Abstract
The presented concept combines the widely-established use of macromolecular prodrugs with nanoparticulate drug delivery devices. For this purpose, the water-soluble biopolymer dextran was functionalized with poorly water-soluble drugs (ibuprofen, naproxen) via in situ activation of the carboxylic groups with N,N(')-carbonyldiimidazole (CDI). The resulting hydrophobic derivatives self-assemble into nanoparticles with high loading efficiency during nanoprecipitation. The degree of substitution (DS) and the preparation technique strongly influence the size and the size distribution of the resulting nanoparticles. The particle suspensions remained stable over months in a pH value range between 4 and 11. Derivatives with high DS values are more stable against hydrolysis and after the addition of electrolytes than lowly substituted ones. Therefore, a defined tuning of the DS value may allow the adjustment of the pH-dependent hydrolysis rate and, hence, the release of the drugs.
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Affiliation(s)
- Stephanie Hornig
- Center of Excellence for Polysaccharide Research, Friedrich-Schiller-Universität Jena, Humboldtstrasse 10, D-07743 Jena, Germany
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Mishra B, Patel BB, Tiwari S. Colloidal nanocarriers: a review on formulation technology, types and applications toward targeted drug delivery. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2009; 6:9-24. [PMID: 19447208 DOI: 10.1016/j.nano.2009.04.008] [Citation(s) in RCA: 364] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Revised: 04/13/2009] [Accepted: 04/28/2009] [Indexed: 10/20/2022]
Abstract
UNLABELLED Colloidal nanocarriers, in their various forms, have the possibility of providing endless opportunities in the area of drug delivery. The current communication embodies an in-depth discussion of colloidal nanocarriers with respect to formulation aspects, types, and site-specific drug targeting using various forms of colloidal nanocarriers with special insights to the field of oncology. Specialized nanotechnological approaches like quantum dots, dendrimers, integrins, monoclonal antibodies, and so forth, which have been extensively researched for targeted delivery of therapeutic and diagnostic agents, are also discussed. Nanotechnological patents, issued by the U.S. Patent and Trademark Office in the area of drug delivery, are also included in this review to emphasize the importance of nanotechnology in the current research scenario. FROM THE CLINICAL EDITOR Colloidal nanocarriers provide almost endless opportunities in the area of drug delivery. While the review mainly addresses potential oncological applications, similar approaches may be applicable in other conditions with a requirement for targeted drug delivery. Technologies including quantum dots, dendrimers, integrins, monoclonal antibodies are discussed, along with US-based patents related to these methods.
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Affiliation(s)
- B Mishra
- Department of Pharmaceutics, Institute of Technology, Banaras Hindu University, Varanasi, India.
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Moribe K, Wanawongthai C, Shudo J, Higashi K, Yamamoto K. Morphology and surface States of colloidal probucol nanoparticles evaluated by atomic force microscopy. Chem Pharm Bull (Tokyo) 2008; 56:878-80. [PMID: 18520102 DOI: 10.1248/cpb.56.878] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Morphology and surface states of colloidal probucol nanoparticles after dispersion of probucol/polyvinylpyrrolidone (PVP)/sodium dodecyl sulphate (SDS) ternary ground mixture into water were investigated by atomic force microscopy (AFM). The observed particles had core-shell structure, i.e. drug nanocrystals were covered with PVP and SDS complex. The AFM phase image and the force curve analyses indicated that probucol nanoparticles with PVP K17 showed layer structure, compared to those with PVPK12. The structural difference was explainable in terms of the molecular states of PVP-SDS complex on the particle surface. These findings support not only the mechanism of drug nanoparticle formation but also the in vivo absorption results with the almost same particle size of ca. 40 nm.
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Affiliation(s)
- Kunikazu Moribe
- Graduate School of Pharmaceutical Sciences, Chiba University, Japan.
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Anumansirikul N, Wittayasuporn M, Klinubol P, Tachaprutinun A, Wanichwecharungruang SP. UV-screening chitosan nanocontainers: increasing the photostability of encapsulated materials and controlled release. NANOTECHNOLOGY 2008; 19:205101. [PMID: 21825731 DOI: 10.1088/0957-4484/19/20/205101] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Methyl ether terminated poly(ethylene glycol)-4-methoxycinnamoylphthaloylchitosan (PCPLC), a UV absorptive polymer, and methyl ether terminated poly(ethylene glycol)-phthaloylchitosan (PPLC) were synthesized, characterized and self-assembled into stable water-dispersible spherical nanoparticles. The encapsulation of a model compound, 2-ethylhexyl-4-methoxycinnamate (EHMC), was carried out to give particles with 67% (w/w) EHMC loading. The E to Z photoisomerization of EHMC encapsulated inside both particles was monitored and compared to non-encapsulated EHMC. Minimal E to Z photoisomerization was observed when EHMC was encapsulated in PCPLC particles prepared from a polymer with a maximum degree of 4-methoxycinnamoyl substitution. The results indicated that the grafted UVB absorptive chromophore, 4-methoxycinnamoyl moieties, situated at the shell of PCPLC nanoparticles acted as a UV-filtering barrier, protecting the encapsulated EHMC from the UVB radiation, thus minimizing its photoisomerization. In vitro experiments revealed the pH-dependent controlled release of EHMC from PCPLC and PPLC particles. Ex vivo experiments, using a Franz diffusion cell with baby mouse skin, indicated that neither PPLC nor PCPLC particles could penetrate the skin into the receptor medium after a 24 h topical application. When applied on the baby mouse skin, both EHMC-encapsulated PPLC and EHMC-encapsulated PCPLC showed comparable controlled releases of the EHMC. The released EHMC could transdermally penetrate the baby mouse skin.
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Affiliation(s)
- Nattaporm Anumansirikul
- The Petrochemistry and Polymer Science Program, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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Li J, Yu S, Yao P, Jiang M. Lysozyme-dextran core-shell nanogels prepared via a green process. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:3486-3492. [PMID: 18302424 DOI: 10.1021/la702785b] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A novel method has been developed for preparing nanogels with a lysozyme core and dextran shell. The method involves the Maillard dry-heat process and heat-gelation process. First, lysozyme-dextran conjugates were produced through the Maillard reaction. Then, the conjugate solution was heated above the denaturation temperature of lysozyme to produce nanogels. The nanogels are of spherical shape having a hydrodynamic diameter of about 200 nm and swelling ratio of about 30. The nanogel solutions are stable against long-term storage as well as changes in pH and ionic strength. Ibuprofen has been used as a drug model to study the electrostatic and hydrophobic interactions with these nanogels at different pH values. The study reveals that the nanogels are more suitable for loading protonated ibuprofen. We have verified that the knowledge of the formation mechanism of lysozyme-dextran nanogels can be applied to prepare other globular protein-dextran nanogels.
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Affiliation(s)
- Juan Li
- The Key Laboratory of Molecular Engineering of Polymer and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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Abstract
Nanotechnology is a scientific movement that has the potential to transform the diagnosis and treatment of disease in the 21st century. The area of investigation is defined by the study, design, manipulation, manufacture, and control of materials or devices by physical or chemical means at resolutions on the order of one billionth of a meter. The potential for a wide range of clinical applications makes a basic understanding of nanotechnology important to physiatrists. This review presents an introduction to nanotechnology and discusses key developments in tissue engineering, drug delivery, imaging, diagnostics, surface texturing, and biointerfaces that could impact the practice of physiatry in the future.
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Affiliation(s)
- Assaf T Gordon
- Department of Physical Medicine and Rehabilitation, New York University, Rusk Institute, New York, New York, USA.
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Couvreur P, Vauthier C. Nanotechnology: intelligent design to treat complex disease. Pharm Res 2006; 23:1417-50. [PMID: 16779701 DOI: 10.1007/s11095-006-0284-8] [Citation(s) in RCA: 514] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2005] [Accepted: 03/01/2006] [Indexed: 01/19/2023]
Abstract
The purpose of this expert review is to discuss the impact of nanotechnology in the treatment of the major health threats including cancer, infections, metabolic diseases, autoimmune diseases, and inflammations. Indeed, during the past 30 years, the explosive growth of nanotechnology has burst into challenging innovations in pharmacology, the main input being the ability to perform temporal and spatial site-specific delivery. This has led to some marketed compounds through the last decade. Although the introduction of nanotechnology obviously permitted to step over numerous milestones toward the development of the "magic bullet" proposed a century ago by the immunologist Paul Ehrlich, there are, however, unresolved delivery problems to be still addressed. These scientific and technological locks are discussed along this review together with an analysis of the current situation concerning the industrial development.
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Affiliation(s)
- Patrick Couvreur
- Laboratoire de Physico-chimie, Pharmacotechnie et Biopharmacie, UMR CNRS 8612, Université de Paris Sud, 5 Rue J.B. Clément, 92 296, Chatenay-Malabry Cedex, France
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Cui F, Qian F, Yin C. Preparation and characterization of mucoadhesive polymer-coated nanoparticles. Int J Pharm 2006; 316:154-61. [PMID: 16567070 DOI: 10.1016/j.ijpharm.2006.02.031] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2005] [Revised: 02/16/2006] [Accepted: 02/18/2006] [Indexed: 10/24/2022]
Abstract
The transmucosal routes such as pulmonary, nasal and oral routes are most important and common routes for drug delivering to the body. However, peptide and protein drugs are degraded before they reach the blood stream and cannot cross the mucosal barriers. The mucoadhesive polymer-coated nanoparticles colloidal carriers can solve these problems. In the present investigation, mucoadhesive polymer-coated nanoparticles were prepared by emulsion polymerization process. A detailed preparation procedure of the mucoadhesive polymer-coated nanoparticles was provided. The parameters such as portion of the mucoadhesive polymers and concentration of the radical initiator were investigated. The resulting chitosan-coated nanoparticles colloids possessed positive surface charge, while poly(acrylic acid)-coated nanoparticles colloids and carbopol-coated nanoparticles colloids had negative surface charge. These nanoparticles were suitable for carrying hydrophilic protein or peptide drugs. Chitosan-coated nanoparticles were stable when pH value below 11, while poly(acrylic acid)-coated nanoparticles and carbopol-coated nanoparticles were stable under physiological pH conditions. Therefore, they are promising for transmucosal drug delivery.
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Affiliation(s)
- Fuying Cui
- State Key Laboratory of Genetic Engineering, Department of Pharmaceutical Sciences, School of Life Sciences, Fudan University, Shanghai 200433, China
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Zhu X, Zhu X, Wang B. Determination of Trace Cadmium in Water Samples by Graphite Furnace Atomic Absorption Spectrometry after Cloud Point Extraction. Mikrochim Acta 2006. [DOI: 10.1007/s00604-005-0476-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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