51
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Stefani S, Hönzke S, Cuellar Camacho JL, Neumann F, Prasad AK, Hedtrich S, Haag R, Servin P. Hyperbranched glycerol-based core-amphiphilic branched shell nanotransporters for dermal drug delivery. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.04.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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52
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Cai XJ, Woods A, Mesquida P, Jones SA. Assessing the Potential for Drug–Nanoparticle Surface Interactions To Improve Drug Penetration into the Skin. Mol Pharm 2016; 13:1375-84. [DOI: 10.1021/acs.molpharmaceut.6b00032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- X. J. Cai
- Institute of Pharmaceutical Science, School of Life Sciences & Medicine, Franklin-Wilkins Building, Kings College London, London, SE1 9NH U.K
| | - A. Woods
- Institute of Pharmaceutical Science, School of Life Sciences & Medicine, Franklin-Wilkins Building, Kings College London, London, SE1 9NH U.K
| | - P. Mesquida
- Institute of Pharmaceutical Science, School of Life Sciences & Medicine, Franklin-Wilkins Building, Kings College London, London, SE1 9NH U.K
| | - S. A. Jones
- Institute of Pharmaceutical Science, School of Life Sciences & Medicine, Franklin-Wilkins Building, Kings College London, London, SE1 9NH U.K
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53
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Tan YJ, Lee CS, Er HM, Lim WH, Wong SF. In-vitro evaluation of griseofulvin loaded lipid nanoparticles for topical delivery. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2015.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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54
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Radar charts based on particle sizing as an approach to establish the fingerprints of polymeric nanoparticles in aqueous formulations. J Drug Deliv Sci Technol 2015. [DOI: 10.1016/j.jddst.2015.10.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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55
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Firooz A, Nafisi S, Maibach HI. Novel drug delivery strategies for improving econazole antifungal action. Int J Pharm 2015; 495:599-607. [DOI: 10.1016/j.ijpharm.2015.09.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 09/10/2015] [Accepted: 09/11/2015] [Indexed: 10/23/2022]
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56
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Hamishehkar H, Ghanbarzadeh S, Sepehran S, Javadzadeh Y, Adib ZM, Kouhsoltani M. Histological assessment of follicular delivery of flutamide by solid lipid nanoparticles: potential tool for the treatment of androgenic alopecia. Drug Dev Ind Pharm 2015; 42:846-53. [DOI: 10.3109/03639045.2015.1062896] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Hamed Hamishehkar
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,
| | - Saeed Ghanbarzadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,
- Department of Pharmaceutics, Faculty of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran,
| | - Sasan Sepehran
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,
| | - Yousef Javadzadeh
- Dermatology & Dermopharmacy Research Team and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran,
| | - Zahra Mardhiah Adib
- Students’ Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran, and
| | - Maryam Kouhsoltani
- Research Center for Pharmaceutical Nanotechnology and Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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Applications and limitations of lipid nanoparticles in dermal and transdermal drug delivery via the follicular route. Eur J Pharm Biopharm 2015; 97:152-63. [PMID: 26144664 DOI: 10.1016/j.ejpb.2015.06.020] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 04/10/2015] [Accepted: 06/08/2015] [Indexed: 01/22/2023]
Abstract
Lipid nanoparticles (LN) such as solid lipid nanoparticles (SLN) and nanolipid carriers (NLC) feature several claimed benefits for topical drug therapy including biocompatible ingredients, drug release modification, adhesion to the skin, and film formation with subsequent hydration of the superficial skin layers. However, penetration and permeation into and across deeper skin layers are restricted due to the barrier function of the stratum corneum (SC). As different kinds of nanoparticles provide the potential for penetration into hair follicles (HF) LN are applicable drug delivery systems (DDS) for this route in order to enhance the dermal and transdermal bioavailability of active pharmaceutical ingredients (API). Therefore, this review addresses the HF as application site, published formulations of LN which showed follicular penetration (FP), and characterization methods in order to identify and quantify the accumulation of API delivered by the LN in the HF. Since LN are based on lipids that appear in human sebum which is the predominant medium in HF an increased localization of the colloidal carriers as well as a promoted drug release may be assumed. Therefore, sebum-like lipid material and a size of less or equal 640 nm are appropriate specifications for FP of particulate formulations.
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Mancini G, Lopes RM, Clemente P, Raposo S, Gonçalves LMD, Bica A, Ribeiro HM, Almeida AJ. Lecithin and parabens play a crucial role in tripalmitin-based lipid nanoparticle stabilization throughout moist heat sterilization and freeze-drying. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201400431] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guiliana Mancini
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Rui M. Lopes
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Pierpaolo Clemente
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Sara Raposo
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Lídia M. D. Gonçalves
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - António Bica
- Laboratório de Estudos Farmacêuticos (LEF); Barcarena Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - António J. Almeida
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
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Eckl KM, Weindl G, Ackermann K, Küchler S, Casper R, Radowski MR, Haag R, Hennies HC, Schäfer-Korting M. Increased cutaneous absorption reflects impaired barrier function of reconstructed skin models mimicking keratinisation disorders. Exp Dermatol 2015; 23:286-8. [PMID: 24612062 DOI: 10.1111/exd.12366] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2014] [Indexed: 11/29/2022]
Abstract
The aim of this study was to assess a recently established 3D model of congenital ichthyosis, representing severe epidermal barrier function defects, for skin penetration and permeation. We have generated disease models by knock-down of either TGM1 or ALOXE3 in primary human keratinocytes, and using keratinocytes and fibroblasts from patients with congenital ichthyosis. The results indicate disturbed barrier function as demonstrated by increased permeation of testosterone and caffeine particularly in TGM1 knock-down models compared to control models. In addition, enhanced penetration of the model dye nile red incorporated into solid lipid nanoparticles and core-multishell nanotransporters, respectively, was evident in disease models. Thus, in vitro skin disease models reproduce differences in barrier permeability and function seen in congenital ichthyosis and pave the way to personalised disease models. Furthermore, our findings indicate that nanocarriers may be useful in new, topical therapeutic approaches for the currently very limited treatment of congenital ichthyosis.
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Affiliation(s)
- Katja-Martina Eckl
- Dermatogenetics, Division of Human Genetics and Department of Dermatology and Venereology, Innsbruck Medical University, Innsbruck, Austria; Dermatogenetics, Cologne Center for Genomics, University of Cologne, Cologne, Germany
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60
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Adeli M, Namazi H, Du F, Hönzke S, Hedtrich S, Keilitz J, Haag R. Synthesis of multiarm star copolymers based on polyglycerol cores with polylactide arms and their application as nanocarriers. RSC Adv 2015. [DOI: 10.1039/c4ra14619k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Hyperbranched polyglycerol (hPG) with two different molecular weights (hPG2400and hPG8000) was used as a macroinitiator for the polymerization of lactide.
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Affiliation(s)
- M. Adeli
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- D-14195 Berlin
- Germany
- Department of Chemistry
| | - H. Namazi
- Lab of Dendrimers and Biopolymers
- Faculty of Chemistry
- University of Tabriz
- Tabriz
- Iran
| | - F. Du
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- D-14195 Berlin
- Germany
| | - S. Hönzke
- Institute of Pharmacy (Pharmacology and Toxicology)
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - S. Hedtrich
- Institute of Pharmacy (Pharmacology and Toxicology)
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - J. Keilitz
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- D-14195 Berlin
- Germany
| | - R. Haag
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- D-14195 Berlin
- Germany
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61
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López-García R, Ganem-Rondero A. Solid Lipid Nanoparticles (SLN) and Nanostructured Lipid Carriers (NLC): Occlusive Effect and Penetration Enhancement Ability. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/jcdsa.2015.52008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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62
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Gala U, Chauhan H. Principles and applications of Raman spectroscopy in pharmaceutical drug discovery and development. Expert Opin Drug Discov 2014; 10:187-206. [DOI: 10.1517/17460441.2015.981522] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Urvi Gala
- 1Creighton University, School of Pharmacy and Health Professions, 2500 California Plaza, Omaha, NE 68178, USA
| | - Harsh Chauhan
- 2Creighton University, School of Pharmacy and Health Professions, Department of Pharmacy Sciences, 2500 California Plaza, Omaha, NE 68178, USA ;
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63
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Ascenso A, Salgado A, Euletério C, Praça FG, Bentley MVLB, Marques HC, Oliveira H, Santos C, Simões S. In vitro and in vivo topical delivery studies of tretinoin-loaded ultradeformable vesicles. Eur J Pharm Biopharm 2014; 88:48-55. [DOI: 10.1016/j.ejpb.2014.05.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 04/23/2014] [Accepted: 05/02/2014] [Indexed: 10/25/2022]
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64
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Aburahma MH, Badr-Eldin SM. Compritol 888 ATO: a multifunctional lipid excipient in drug delivery systems and nanopharmaceuticals. Expert Opin Drug Deliv 2014; 11:1865-83. [PMID: 25152197 DOI: 10.1517/17425247.2014.935335] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Compritol® 888 ATO is a lipid excipient that is generally used in cosmetic industry as a surfactant, emulsifying agent and viscosity-inducing agent in emulsions or creams. Based on its chemical composition, Compritol 888 ATO is a blend of different esters of behenic acid with glycerol. AREAS COVERED Recently, there has been great interest in the multiple roles that Compritol 888 ATO plays in various pharmaceutical delivery systems. Accordingly, this review aimed at summarizing the current and potential applications of Compritol 888 ATO in various drug delivery areas. EXPERT OPINION Different researches have highlighted the feasibility of using Compritol 888 ATO as a lubricant or coating agent for oral solid dosage formulations. It has also been explored as a matrix-forming agent for controlling drug release. At present, the most common pharmaceutical application of Compritol 888 ATO is in lipid-based colloidal drug delivery system such as solid lipid microparticles, solid lipid nanoparticles and nanostructured lipid carriers. Although, Compritol 888 ATO has acceptable regulatory and safety profiles and although the number of articles that emphasize on its applicability as an innovative excipient in pharmaceutical technology is continuously increasing, it is not widely used in the pharmaceutical market products and its use is limited to its sustain release ability in extended release tablets.
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Affiliation(s)
- Mona H Aburahma
- King Abdulaziz University, Faculty of Pharmacy, Department of Pharmaceutics and Industrial Pharmacy , Jeddah 21589 , Saudi Arabia
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65
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Hussain A, Samad A, Singh SK, Ahsan MN, Haque MW, Faruk A, Ahmed FJ. Nanoemulsion gel-based topical delivery of an antifungal drug:in vitroactivity andin vivoevaluation. Drug Deliv 2014; 23:642-47. [DOI: 10.3109/10717544.2014.933284] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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66
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Topical delivery of clobetasol propionate loaded microemulsion based gel for effective treatment of vitiligo – Part II: Rheological characterization and in vivo assessment through dermatopharmacokinetic and pilot clinical studies. Colloids Surf B Biointerfaces 2014; 119:145-53. [DOI: 10.1016/j.colsurfb.2014.02.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 12/31/2013] [Accepted: 02/04/2014] [Indexed: 11/20/2022]
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67
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Kupetz E, Bunjes H. Lipid nanoparticles: drug localization is substance-specific and achievable load depends on the size and physical state of the particles. J Control Release 2014; 189:54-64. [PMID: 24933601 DOI: 10.1016/j.jconrel.2014.06.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 06/03/2014] [Accepted: 06/05/2014] [Indexed: 12/23/2022]
Abstract
Lipid nanoemulsions and -suspensions are being intensively investigated as carriers for poorly water soluble drugs. The question on where model compounds or probes are localized within the dispersions has been the subject of several studies. However, only little data exists for pharmaceutically relevant molecules in dispersions composed of pharmaceutically relevant excipients. In this work, the localization of drugs and drug-like substances was studied in lipid nanoemulsions and -suspensions. Conclusions about the drug localization were drawn from the relations between lipid mass, specific particle surface area and drug load in the dispersions. Additionally, the achievable drug loads of the liquid and the solid lipid particles were compared. Nanoemulsions and -suspensions comprised trimyristin as lipid matrix and poloxamer 188 as emulsifier and were prepared with different well-defined particle sizes. These pre-formed dispersions were passively loaded with either amphotericin B, curcumin, dibucaine, fenofibrate, mefenamic acid, propofol, or a porphyrin derivative. The physico-chemical properties of the particles were characterized; drug load and lipid content were quantified by UV spectroscopy and high performance liquid chromatography, respectively. For all drugs the passive loading procedure was successful in both emulsions and suspensions. Solid particles accommodate drug molecules preferably at the particle surface. Liquid particles can accommodate drugs at the particle surface as well as in the core; the distribution between the two sites is drug specific. It is also drug specific whether solid or liquid particles yield higher drug loads. As a general rule, smaller particles led to higher drug loads than larger ones. Propofol and the porphyrin derivative displayed eutectic interaction with the lipid and crystal growth after loading, respectively.
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Affiliation(s)
- Eva Kupetz
- Institute of Pharmaceutical Technology, Technische Universität Braunschweig, Mendelssohnstraße 1, 38106 Braunschweig, Germany.
| | - Heike Bunjes
- Institute of Pharmaceutical Technology, Technische Universität Braunschweig, Mendelssohnstraße 1, 38106 Braunschweig, Germany.
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68
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Jaiswal P, Gidwani B, Vyas A. Nanostructured lipid carriers and their current application in targeted drug delivery. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:27-40. [DOI: 10.3109/21691401.2014.909822] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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69
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Hussain A, Samad A, Singh SK, Ahsan MN, Faruk A, Ahmed FJ. Enhanced stability and permeation potential of nanoemulsion containing sefsol-218 oil for topical delivery of amphotericin B. Drug Dev Ind Pharm 2014; 41:780-90. [DOI: 10.3109/03639045.2014.902957] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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70
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Ali-von Laue C, Zoschke C, Do N, Lehnen D, Küchler S, Mehnert W, Blaschke T, Kramer KD, Plendl J, Weindl G, Korting HC, Hoeller Obrigkeit D, Merk HF, Schäfer-Korting M. Improving topical non-melanoma skin cancer treatment: In vitro efficacy of a novel guanosine-analog phosphonate. Skin Pharmacol Physiol 2014; 27:173. [PMID: 24503861 DOI: 10.1159/000354118] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 07/01/2013] [Indexed: 11/19/2022]
Abstract
Actinic keratosis, a frequent carcinoma in situ of non-melanoma skin cancer (NMSC), can transform into life-threatening cutaneous squamous cell carcinoma. Current treatment is limited due to low complete clearance rates and asks for novel therapeutic concepts; the novel purine nucleotide analogue OxBu may be an option. In order to enhance skin penetration, solid lipid nanoparticles (SLN, 136-156 nm) were produced with an OxBu entrapment efficiency of 96.5 ± 0.1%. For improved preclinical evaluation, we combined tissue engineering with clinically used keratin-18 quantification. Three doses of 10(-3) mol/l OxBu, dissolved in phosphate-buffered saline as well as loaded to SLN, were effective on reconstructed NMSC. Tumour response and apoptosis induction were evaluated by an increase in caspase-cleaved fragment of keratin-18, caspase-7 activation as well as by reduced expression of matrix metallopeptidase-2 and Ki-67. OxBu efficacy was superior to equimolar 5-fluorouracil solution, and thus the drug should be subjected to the next step in preclinical evaluation.
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Affiliation(s)
- C Ali-von Laue
- Institute for Pharmacy, Freie Universität Berlin, Berlin, Germany
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71
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72
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Aljuffali IA, Sung CT, Shen FM, Huang CT, Fang JY. Squarticles as a lipid nanocarrier for delivering diphencyprone and minoxidil to hair follicles and human dermal papilla cells. AAPS J 2014; 16:140-50. [PMID: 24307611 PMCID: PMC3889522 DOI: 10.1208/s12248-013-9550-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 11/15/2013] [Indexed: 01/08/2023] Open
Abstract
Delivery of diphencyprone (DPCP) and minoxidil to hair follicles and related cells is important in the treatment of alopecia. Here we report the development of "squarticles," nanoparticles formed from sebum-derived lipids such as squalene and fatty esters, for use in achieving targeted drug delivery to the follicles. Two different nanosystems, nanostructured lipid carriers (NLC) and nanoemulsions (NE), were prepared. The physicochemical properties of squarticles, including size, zeta potential, drug encapsulation efficiency, and drug release, were examined. Squarticles were compared to a free control solution with respect to skin absorption, follicular accumulation, and dermal papilla cell targeting. The particle size of the NLC type was 177 nm; that of the NE type was 194 nm. Approximately 80% of DPCP and 60% of minoxidil were entrapped into squarticles. An improved drug deposition in the skin was observed in the in vitro absorption test. Compared to the free control, the squarticles reduced minoxidil penetration through the skin. This may indicate a minimized absorption into systemic circulation. Follicular uptake by squarticles was 2- and 7-fold higher for DPCP and minoxidil respectively compared to the free control. Fluorescence and confocal images of the skin confirmed a great accumulation of squarticles in the follicles and the deeper skin strata. Vascular endothelial growth factor expression in dermal papilla cells was significantly upregulated after the loading of minoxidil into the squarticles. In vitro papilla cell viability and in vivo skin irritancy tests in nude mice suggested a good tolerability of squarticles to skin. Squarticles provide a promising nanocarrier for topical delivery of DPCP and minoxidil.
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Affiliation(s)
- Ibrahim A. Aljuffali
- />Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Calvin T. Sung
- />Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, USA
| | - Feng-Ming Shen
- />Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan, Taoyuan 333 Taiwan
- />Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Kweishan, Taoyuan Taiwan
| | - Chi-Ting Huang
- />Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan, Taoyuan 333 Taiwan
- />Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Kweishan, Taoyuan Taiwan
| | - Jia-You Fang
- />Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan, Taoyuan 333 Taiwan
- />Research Center for Industry of Human Ecology, Chang Gung University of Science and Technology, Kweishan, Taoyuan Taiwan
- />Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung, Taiwan
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73
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Lee SG, Jeong JH, Lee KM, Jeong KH, Yang H, Kim M, Jung H, Lee S, Choi YW. Nanostructured lipid carrier-loaded hyaluronic acid microneedles for controlled dermal delivery of a lipophilic molecule. Int J Nanomedicine 2013; 9:289-99. [PMID: 24403833 PMCID: PMC3883594 DOI: 10.2147/ijn.s54529] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Nanostructured lipid carriers (NLCs) were employed to formulate a lipophilic drug into hydrophilic polymeric microneedles (MNs). Hyaluronic acid (HA) was selected as a hydrophilic and bioerodible polymer to fabricate MNs, and nile red (NR) was used as a model lipophilic molecule. NR-loaded NLCs were consolidated into the HA-based MNs to prepare NLC-loaded MNs (NLC-MNs). A dispersion of NLCs was prepared by high-pressure homogenization after dissolving NR in Labrafil and mixing with melted Compritol, resulting in 268 nm NLCs with a polydispersity index of 0.273. The NLC dispersion showed a controlled release of NR over 24 hours, following Hixson-Crowell's cube root law. After mixing the NLC dispersion with the HA solution, the drawing lithography method was used to fabricate NLC-MNs. The length, base diameter, and tip diameter of the NLC-MNs were approximately 350, 380, and 30 μm, respectively. Fluorescence microscopic imaging of the NLC-MNs helped confirm that the NR-loaded NLCs were distributed evenly throughout the MNs. In a skin permeation study performed using a Franz diffusion cell with minipig dorsal skin, approximately 70% of NR was localized in the skin after 24-hour application of NLC-MNs. Confocal laser scanning microscopy (z-series) of the skin at different depths showed strong fluorescence intensity in the epidermal layer, which appeared to spread out radially with the passage of time. This study indicated that incorporation of drug-loaded NLCs into MNs could represent a promising strategy for controlled dermal delivery of lipophilic drugs.
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Affiliation(s)
- Sang Gon Lee
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | - Jae Han Jeong
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | - Kyung Min Lee
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | - Kyu Ho Jeong
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | - Huisuk Yang
- Department of Biotechnology, Yonsei University, Seoul, South Korea
| | - Miroo Kim
- Department of Biotechnology, Yonsei University, Seoul, South Korea
| | - Hyungil Jung
- Department of Biotechnology, Yonsei University, Seoul, South Korea
| | - Sangkil Lee
- College of Pharmacy, Keimyung University, Daegu, South Korea
| | - Young Wook Choi
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
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74
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Küchler S, Strüver K, Friess W. Reconstructed skin models as emerging tools for drug absorption studies. Expert Opin Drug Metab Toxicol 2013; 9:1255-63. [PMID: 23829446 DOI: 10.1517/17425255.2013.816284] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION As humans can come into contact with xenobiotics intentionally or accidentally, knowledge about the skin absorption of these substances is crucial and requires reliable models and test procedures. Animal experiments should be avoided whenever possible, instead of making the use of in vitro systems. Furthermore, due to limited availability of normal and especially diseased human skin, alternative test systems such as reconstructed skin models are urgently required. AREAS COVERED This article discusses the advantages and limitations of excised human skin, animal skin and reconstructed skin models for absorption testing in vitro. Furthermore, the authors also describe the standard procedure for skin absorption testing and give an excursion to the applicability of artificial membranes. Finally, the article highlights the progress in the development of reconstructed disease models and provides an extensive overview about past and ongoing research in this field. EXPERT OPINION The development and validation of in vitro systems for skin absorption testing is inevitable. More research efforts are required for the development of reconstructed disease models. Reconstructed skin models need to be improved, especially in terms of complexity to mimic the in vivo situation better. It should not, however, be the main goal to imitate the in vivo situation exactly, but to establish reliable systems that ensure predictive and reliable data.
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Affiliation(s)
- Sarah Küchler
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität , Königin-Luise-Str. 2-4, 14195, Berlin , Germany +49 30 838 55065 ; +49 30 838 53944 ;
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75
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Tamilvanan S, Baskar R. Effect of non-phospholipid-based cationic and phospholipid-based anionic nanosized emulsions on skin retention and anti-inflammatory activity of celecoxib. Pharm Dev Technol 2013; 18:761-71. [PMID: 23668371 DOI: 10.3109/10837450.2011.586038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT Celecoxib (CXB, 0.2 g)-loaded anionic and cationic nanosized emulsions were prepared by a well-established combined emulsification method. OBJECTIVES To investigate the effect of non-phospholipid-based cationic and phospholipid-based anionic emulsions on skin retention and anti-inflammatory activity of CXB. METHODS Using Keshary-Chien diffusion cells with cellulose acetate membrane or excised rat skin, in vitro release and skin retention of CXB from solution and emulsions were studied. The anti-inflammatory activity was evaluated by the carrageenan-induced hind paw edema method in Wistar rats. RESULTS The amount of drug released through artificial membrane has decreased from 122.00 ± 0.70 μg/cm(2) for the CXB solution to 55.80 ± 0.70 μg/cm(2) for anionic emulsion, and then further decreased to 24.79 ± 0.90 μg/cm(2) for cationic emulsion. The JSS value obtained with solution, anionic, and cationic emulsions were 6825.79 ± 920.86, 2513.15 ± 382.71, and 1925.67 ± 147.42, respectively. Cationic emulsion showed a significantly higher level (P ≤ 0.05) of drug accumulation in full-thickness rat skin than anionic emulsion, and a substantially lesser percentage inhibition of edema values compared with both solution and anionic emulsion. DISCUSSION AND CONCLUSION Sustained drug release together with increased skin accumulation and simultaneously decreased skin permeation as observed with cationic emulsion should substantiate its suitability as a topical delivery vehicle for CXB.
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Affiliation(s)
- S Tamilvanan
- International Medical University SDN BHD, Bukit Jalil, 57000 Kuala Lumpur, Malaysia.
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76
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Khalil RM, Abd-Elbary A, Kassem MA, Ghorab MM, Basha M. Nanostructured lipid carriers (NLCs) versus solid lipid nanoparticles (SLNs) for topical delivery of meloxicam. Pharm Dev Technol 2013; 19:304-14. [PMID: 23528038 DOI: 10.3109/10837450.2013.778872] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim of this study was to develop nanostructured lipid carriers (NLCs) as well as solid lipid nanoparticles (SLNs) and evaluate their potential in the topical delivery of meloxicam (MLX). MATERIALS AND METHODS The effect of various compositional variations on their physicochemical properties was investigated. Furthermore, MLX-loaded lipid nanoparticles-based hydrogels were formulated and the gels were evaluated as vehicles for topical application. RESULTS AND DISCUSSION The results showed that NLC and SLN dispersions had spherical shapes with an average size between 215 and 430 nm. High entrapment efficiency was obtained ranging from 61.94 to 90.38% with negatively charged zeta potential in the range of -19.1 to -25.7 mV. The release profiles of all formulations exhibited sustained release characteristics over 48 h and the release rates increased as the amount of liquid lipid in lipid core increased. Finally, Precirol NLC with 50% Miglyol® 812 and its corresponding SLN were incorporated in hydrogels. The gels showed adequate pH, non-Newtonian flow with shear-thinning behavior and controlled release profiles. The biological evaluation revealed that MLX-loaded NLC gel showed more pronounced effect compared to MLX-loaded SLN gel. CONCLUSION It can be concluded that lipid nanoparticles represent promising particulate carriers for topical application.
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Affiliation(s)
- Rawia M Khalil
- Department of Pharmaceutical Technology, National Research Center , Cairo , Egypt
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77
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Karadzovska D, Brooks JD, Monteiro-Riviere NA, Riviere JE. Predicting skin permeability from complex vehicles. Adv Drug Deliv Rev 2013; 65:265-77. [PMID: 22342772 DOI: 10.1016/j.addr.2012.01.019] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 01/23/2012] [Accepted: 01/31/2012] [Indexed: 11/17/2022]
Abstract
It is now widely accepted that vehicle and formulation components influence the rate and extent of passive chemical absorption through skin. Significant progress, over the last decades, has been made in predicting dermal absorption from a single vehicle; however the effect of a complex, realistic mixture has not received its due attention. Recent studies have aimed to bridge this gap by extending the use of quantitative structure-permeation relationship (QSPR) models based on linear free energy relationships (LFER) to predict dermal absorption from complex mixtures with the inclusion of significant molecular descriptors such as a mixture factor that accounts for the physicochemical properties of the vehicle/mixture components. These models have been compiled and statistically validated using the data generated from in vitro or ex vivo experimental techniques. This review highlights the progress made in predicting skin permeability from complex vehicles.
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Affiliation(s)
- Daniela Karadzovska
- Center for Chemical Toxicology Research and Pharmacokinetics, North Carolina State University, Raleigh, NC 27607, USA
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78
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Diffusion Behaviors of Fluorescence Probe Molecules Through the Stratum Corneum Layer Under Physical Stress. J Membr Biol 2013; 246:263-9. [DOI: 10.1007/s00232-013-9527-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 01/15/2013] [Indexed: 11/26/2022]
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79
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Bose S, Michniak-Kohn B. Preparation and characterization of lipid based nanosystems for topical delivery of quercetin. Eur J Pharm Sci 2012; 48:442-52. [PMID: 23246734 DOI: 10.1016/j.ejps.2012.12.005] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Revised: 12/02/2012] [Accepted: 12/04/2012] [Indexed: 11/24/2022]
Abstract
The main objective of this study was to evaluate the potential of lipid nanosystems for topical delivery of the naturally occurring flavonoid quercetin. These lipid based nanosystems were manufactured using a solvent free probe ultrasonication process. Formulation factors such as the nature of the lipid (solid/combination of solid and liquid) in solid lipid nanoparticle (SLN) and nanostructured lipid carrier (NLC) systems and drug loading were evaluated to produce an optimum formulation with adequate physical stability for up to 14 weeks at 2-8°C. The mean particle size of the optimized formulation was around 282 nm, with a zeta potential value of -36.57 ± 2.67 mV, indicating the formation of a stable system. Release studies showed a biphasic release profile, characterized by an initial burst release followed by a more controlled release pattern from both SLN and NLC systems. The NLC system showed the highest improvement in topical delivery of quercetin manifested by the amount of quercetin retained in full thickness human skin, compared to a control formulation with similar composition and particle size in the micrometer range. This study demonstrated the feasibility of nanostructured lipid carrier systems for improved topical delivery of quercetin.
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Affiliation(s)
- Sonali Bose
- Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, United States; Pharmaceutical and Analytical Development, Novartis Pharmaceuticals Corporation, One Health Plaza, East Hanover, NJ 07936, United States
| | - Bozena Michniak-Kohn
- Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, United States.
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Development and evaluation of colloidal modified nanolipid carrier: application to topical delivery of tacrolimus, Part II--in vivo assessment, drug targeting, efficacy, and safety in treatment for atopic dermatitis. Eur J Pharm Biopharm 2012; 84:72-83. [PMID: 23246619 DOI: 10.1016/j.ejpb.2012.11.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 11/07/2012] [Accepted: 11/16/2012] [Indexed: 11/20/2022]
Abstract
In atopic dermatitis (AD), topical anti-inflammatory therapy with skin barrier restoration to prevent repeated inflammatory episodes leads to long-term therapeutic success. Tacrolimus, although effective against AD, is a challenging molecule due to low solubility, low-penetration, poor-bioavailability, and toxicity. Part I of this paper, reported novel modified nanolipid carrier system for topical delivery of tacrolimus (T-MNLC), offering great opportunity to load low-solubility drug with improved entrapment efficiency, enhanced stability and improved skin deposition. Present investigation focused on restoration of skin barrier, site-specific delivery, therapeutic effectiveness, and safety of novel T-MNLC. T-MNLC greatly enhanced occlusive properties, skin hydration potential and reduced transepidermal water loss. This might help to reduce the number of flares and better control the disease. Cutaneous uptake and drug deposition in albino rats by HPLC and confocal laser scanning microscopy revealed prominently elevated drug levels in all skin strata with T-MNLC as compared to reference. T-MNLC demonstrated efficient suppression of inflammatory responses in BALB/c mice model of AD. Safety assessment by acute and repeated-dose dermal toxicity demonstrated mild keratosis and collagenous mass infiltration at the treatment area with repeated application of reference. Interestingly, T-MNLC showed no evident toxicity exhibiting safe drug delivery. Thus, novel T-MNLC would be a safe, effective, and esthetically appealing alternative to conventional vehicles for treatment for AD.
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81
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Squalene-Containing Nanostructured Lipid Carriers Promote Percutaneous Absorption and Hair Follicle Targeting of Diphencyprone for Treating Alopecia Areata. Pharm Res 2012; 30:435-46. [DOI: 10.1007/s11095-012-0888-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 09/12/2012] [Indexed: 12/13/2022]
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82
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Vyas A, Das SK, Singh D, Sonker A, Gidwani B, Jain V, Singh M. Recent Nanoparticulate Approaches of Drug Delivery for Skin Cancer. ACTA ACUST UNITED AC 2012. [DOI: 10.3923/tasr.2012.620.635] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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83
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Bolzinger MA, Briançon S, Pelletier J, Chevalier Y. Penetration of drugs through skin, a complex rate-controlling membrane. Curr Opin Colloid Interface Sci 2012. [DOI: 10.1016/j.cocis.2012.02.001] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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84
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Wen CJ, Yen TC, Al-Suwayeh SA, Chang HW, Fang JY. In vivo real-time fluorescence visualization and brain-targeting mechanisms of lipid nanocarriers with different fatty ester:oil ratios. Nanomedicine (Lond) 2012; 6:1545-59. [PMID: 22077462 DOI: 10.2217/nnm.11.46] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
AIMS The objective of the present work was to investigate the influence of the inner cores of lipid nanocarriers on the efficiency of brain targeting. Cetyl palmitate and squalene were respectively chosen as the solid lipid and liquid oil in the inner phase of the nanocarriers. MATERIALS & METHODS Nanoparticulate systems with different cetyl palmitate/squalene ratios were compared by evaluating the size, zeta potential, molecular environment, and mobility of lipids in the systems. RESULTS The particulate diameter ranged from 190 to 210 nm, with systems containing 100% cetyl palmitate in the matrix (solid lipid nanoparticles [SLN]) showing the smallest size, followed by systems with both cetyl palmitate and squalene (nanostructured lipid carriers [NLC]) and with 100% squalene (lipid emulsions [LE]). A cationic surfactant, Forestall, was used to produce a positive surface charge of 40-55 mW. The in vitro release was evaluated using various dyes located in different phases of the nanocarriers. The release of sulforhodamine B occurred in a sustained manner from the shell of the nanocarriers. The in vivo brain distribution of lipid nanosystems after an intravenous injection into rats was monitored by a real-time fluorescence imaging system. LE showed higher brain accumulation than SLN and NLC. NLC only exhibited a slightly higher brain accumulation compared with the aqueous control. Incorporation of sulforhodamine B into LE could prolong its retention in the brain from 20 to 50 min. The results were further confirmed by imaging the entire brain and brain slices. The specific association of lipid nanocarriers with rat brain endothelial cells (bEnd3) was demonstrated using fluorescence microscopy. The cellular uptake of LE and SLN was higher compared with NLC and the aqueous control. LE were observed to be internalized by cells through caveola-mediated and macropinocytotic energy-dependent endocytosis. CONCLUSION The experimental profiles indicated that LE with moderate additives are a promising brain-targeting nanocarrier. The composition of the lipid matrix played a significant role in delivering compounds to the brain.
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Affiliation(s)
- Chih-Jen Wen
- Molecular Imaging Center, Chang Gung Memorial Hospital, Kweishan, Taoyuan, Taiwan
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85
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Delgado D, Gascón AR, del Pozo-Rodríguez A, Echevarría E, Ruiz de Garibay AP, Rodríguez JM, Solinís MÁ. Dextran–protamine–solid lipid nanoparticles as a non-viral vector for gene therapy: In vitro characterization and in vivo transfection after intravenous administration to mice. Int J Pharm 2012; 425:35-43. [DOI: 10.1016/j.ijpharm.2011.12.052] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2011] [Revised: 12/23/2011] [Accepted: 12/25/2011] [Indexed: 12/22/2022]
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86
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Liu KS, Wen CJ, Yen TC, Sung KC, Ku MC, Wang JJ, Fang JY. Combined strategies of apomorphine diester prodrugs and nanostructured lipid carriers for efficient brain targeting. NANOTECHNOLOGY 2012; 23:095103. [PMID: 22327243 DOI: 10.1088/0957-4484/23/9/095103] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Our aim is to develop nanostructured lipid carriers (NLCs) for loading the apomorphine diester prodrugs, diacetyl apomorphine (DAA) and diisobutyryl apomorphine (DIA), into the brain. NLCs were prepared using sesame oil/cetyl palmitate as the lipid matrices. Experiments were performed with the objective of evaluating the physicochemical characteristics, drug release, safety and brain-targeting efficacy of the NLCs. The size of regular NLCs (N-NLCs) was 214 nm. The addition of Forestall (FE) and polyethylene glycol (PEG) to the NLCs (P-NLCs) increased the particle diameter to 250 nm. The zeta potentials of N-NLCs and P-NLCs were respectively shown to be - 21 and 48 mV. Diester prodrugs were more lipophilic and more chemically stable than the parent apomorphine. The hydrolysis study indicated that the prodrugs underwent bioconversion in plasma and brain extract, with DAA exhibiting faster degradation than DIA. Sustained release was achieved through the synergistic effect of integrating strategies of prodrugs and NLCs, with the longer carbon chain showing the slower release (DIA < DAA). None of the NLCs tested here exhibited a toxicity problem according to the examination of neutrophil lactate dehydrogenase (LDH) release and hemolysis. Results of a bioimaging study in mice showed that P-NLCs largely accumulated in the brain. The distribution duration of the fluorescent dye in the brain region was also prolonged by the nanocarriers.
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Affiliation(s)
- Kuo-Sheng Liu
- Graduate Institute of Pharmaceutical Science, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
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87
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Simovic S, Barnes TJ, Tan A, Prestidge CA. Assembling nanoparticle coatings to improve the drug delivery performance of lipid based colloids. NANOSCALE 2012; 4:1220-1230. [PMID: 22159191 DOI: 10.1039/c1nr11273b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Lipid based colloids (e.g. emulsions and liposomes) are widely used as drug delivery systems, but often suffer from physical instabilities and non-ideal drug encapsulation and delivery performance. We review the application of engineered nanoparticle layers at the interface of lipid colloids to improve their performance as drug delivery systems. In addition we focus on the creation of novel hybrid nanomaterials from nanoparticle-lipid colloid assemblies and their drug delivery applications. Specifically, nanoparticle layers can be engineered to enhance the physical stability of submicron lipid emulsions and liposomes, satbilise encapsulated active ingredients against chemical degradation, control molecular transport and improve the dermal and oral delivery characteristics, i.e. increase absorption, bioavailability and facilitate targeted delivery. It is feasible that hybrid nanomaterials composed of nanoparticles and colloidal lipids are effective encapsulation and delivery systems for both poorly soluble drugs and biological drugs and may form the basis for the next generation of medicines. Additional pre-clinical research including specific animal model studies are required to advance the peptide/protein delivery systems, whereas the silica lipid hybrid systems have now entered human clinical trials for poorly soluble drugs.
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Affiliation(s)
- Spomenka Simovic
- Ian Wark Research Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
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88
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Keshri L, Pathak K. Development of thermodynamically stable nanostructured lipid carrier system using central composite design for zero order permeation of Econazole nitrate through epidermis. Pharm Dev Technol 2012; 18:634-44. [DOI: 10.3109/10837450.2012.659256] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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89
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Haag S, Chen M, Peters D, Keck C, Taskoparan B, Fahr A, Teutloff C, Bittl R, Lademann J, Schäfer-Korting M, Meinke M. Nanostructured lipid carriers as nitroxide depot system measured by electron paramagnetic resonance spectroscopy. Int J Pharm 2011; 421:364-9. [DOI: 10.1016/j.ijpharm.2011.10.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 09/30/2011] [Accepted: 10/01/2011] [Indexed: 11/25/2022]
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90
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Structural investigation and intracellular trafficking of a novel multicomposite cationic solid lipid nanoparticle platform as a pDNA carrier. Ther Deliv 2011; 2:1419-35. [DOI: 10.4155/tde.11.118] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: The ability to efficiently cross cellular barriers and accomplish high-level transgene expression is a critical challenge to broad application of nonviral vectors, such as cationic solid lipid nanoparticles (SLN). Aims: This study aims to design and characterize in vitro multicomposite SLN as a novel platform for pDNA delivery. Results/Discussion: The distribution of each component (stearic acid, stearylamine, phosphatidylcholine, cholesterol, protamine and Pluronic F68) in the SLN matrix was studied by electron spectroscopy for chemical analysis and NMR in order to establish its influence on SLN cytotoxicity and transfection efficiency. Multicomposite SLN mediated the expression of enhanced green fluorescent protein in a way comparable with the positive control, but inducing a lower cytotoxicity. Moreover, the carrier exhibited the ability to enter the nucleoli, probably as a result of the synergic action of the nuclear localization signal of protamine and the flexibility of the lipid matrix owing to the phosphatidylcholine. Conclusion: The multicomposite SLN showed good transfection efficiency and negligible cytotoxicity, both crucial factors for an efficient gene-delivery system. Considering the fact that nucleoli have emerged in recent years as important targets in many fields, this novel carrier could have significant future therapy involvements whenever there is a requirement to overcome subcellular barriers. However, further work needs to be carried out in order to fully characterize the formulation, to elucidate where alternative colloidal structures might exist and play a role in obtaining the results presented.
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91
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In vitro penetration properties of solid lipid nanoparticles in intact and barrier-impaired skin. Eur J Pharm Biopharm 2011; 79:68-75. [DOI: 10.1016/j.ejpb.2011.05.012] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 05/13/2011] [Accepted: 05/24/2011] [Indexed: 11/21/2022]
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92
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Tan Q, Liu W, Guo C, Zhai G. Preparation and evaluation of quercetin-loaded lecithin-chitosan nanoparticles for topical delivery. Int J Nanomedicine 2011; 6:1621-30. [PMID: 21904452 PMCID: PMC3160948 DOI: 10.2147/ijn.s22411] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The purpose of this study was to investigate lecithin-chitosan nanoparticles as a topical delivery system for quercetin. METHODS Tocopheryl propylene glycol succinate was chosen to be the surfactant for the nanosystem. The mean particle size of the nanoparticles was 95.3 nm, and the entrapment efficiency and drug loading for quercetin were 48.5% and 2.45%, respectively. Topical delivery in vitro and in vivo of the quercetin-loaded nanoparticles was evaluated using quercetin propylene glycol solution as the control. RESULTS Compared with quercetin solution, the quercetin-loaded nanoparticles showed higher permeation ability, and significantly increased accumulation of quercetin in the skin, especially in the epidermis. Microstructure observation of the skin surface after administration indicated that the interaction between ingredients of the nanoparticles and the skin surface markedly changed the morphology of the stratum corneum and disrupted the corneocyte layers, thus facilitating the permeation and accumulation of quercetin in skin. CONCLUSION Lecithin-chitosan nanoparticles are a promising carrier for topical delivery of quercetin.
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Affiliation(s)
- Qi Tan
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan, People’s Republic of China
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93
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Gupta M, Tiwari S, Vyas SP. Influence of various lipid core on characteristics of SLNs designed for topical delivery of fluconazole against cutaneous candidiasis. Pharm Dev Technol 2011; 18:550-9. [DOI: 10.3109/10837450.2011.598161] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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94
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Transdermal delivery of selegiline from alginate–Pluronic composite thermogels. Int J Pharm 2011; 415:119-28. [DOI: 10.1016/j.ijpharm.2011.05.060] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 05/09/2011] [Accepted: 05/23/2011] [Indexed: 01/22/2023]
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95
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Vázquez MI, Peláez L, Benavente J, López-Romero JM, Rico R, Hierrezuelo J, Guillén E, López-Ramírez MR. Functionalized lipid nanoparticles-cellophane hybrid films for molecular delivery: preparation, physicochemical characterization, and stability. J Pharm Sci 2011; 100:4815-22. [PMID: 21713774 DOI: 10.1002/jps.22688] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 06/05/2011] [Accepted: 06/09/2011] [Indexed: 11/09/2022]
Abstract
Lipid nanoparticles functionalized with the sunscreen 2,4-dihydroxybenzophenone (FLNPs) have been prepared by the ultrasound method and embedded in highly hydrophilic cellophane supports (regenerated cellulose, RC), creating biocompatible hybrid films (RC-FLNPs samples). The morphology of the FLNPs was studied with transmission microscopy, whereas the surface and interior chemical composition was analyzed by micro-Raman spectroscopy. RC-FLNPs hybrid films were prepared from the immersion of two cellophane supports with different thicknesses and water uptake properties (RC-3 and RC-6) in an aqueous dispersion of FLNPs. The structure of this hybrid material was visualized with bright-field microscopy, which clearly showed the inclusion of the FLNPs in the cellophane matrix. The stability of the RC-FLNPs films with respect to both aqueous environments and time was demonstrated by NaCl diffusion measurements. The reduction in the diffusion coefficient through the nanoparticle-modified films compared with the original supports confirms the presence of nanoparticles for concentration gradients of up to 0.4 M (osmotic pressure around 10 bar), indicating the stability of the hybrid hydrophilic material, even in aqueous environments and under matter flow conditions for a period of 21 days.
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Affiliation(s)
- M Isabel Vázquez
- Dept. de Física Aplicada, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
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Araújo J, Nikolic S, Egea MA, Souto EB, Garcia ML. Nanostructured lipid carriers for triamcinolone acetonide delivery to the posterior segment of the eye. Colloids Surf B Biointerfaces 2011; 88:150-7. [PMID: 21764568 DOI: 10.1016/j.colsurfb.2011.06.025] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2011] [Revised: 06/19/2011] [Accepted: 06/20/2011] [Indexed: 01/31/2023]
Abstract
Triamcinolone acetonide (TA) is a corticosteroid drug currently administered by intravitreal injection for a broad spectrum of inflammatory, edematous and angiogenic ocular diseases. To increase the drug's bioavailability by ocular instillation, TA was encapsulated in nanostructured lipid carriers (NLC), previously optimized by our group using a factorial design approach. In the present paper, nanometric (∼200 nm), unimodal and negatively charged NLC loaded with the fluorescent lipid marker Nile red (NR-NLC) and drug (TA-NLC) were produced by high pressure homogenization. Based on the selected formulations, in vivo tests were carried out by eye-drop instillation of NR-NLC in mice, revealing the systems' ability of delivering lipophilic actives to the posterior segment of the eye via the corneal and non-corneal pathways. Short and long-term stability of TA-NLC was assessed by high performance stability analysis using the Turbiscan®. The results showed a backscattering of less than 1.5% and during a period of 6 months, anticipated the low tendency of these particles for aggregation during shelf life when stored at room temperature.
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Affiliation(s)
- Joana Araújo
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Barcelona, Spain
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Understanding the mechanism of protamine in solid lipid nanoparticle-based lipofection: the importance of the entry pathway. Eur J Pharm Biopharm 2011; 79:495-502. [PMID: 21726641 DOI: 10.1016/j.ejpb.2011.06.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 04/11/2011] [Accepted: 06/14/2011] [Indexed: 11/23/2022]
Abstract
The aim of our study was to evaluate the effect of protamine on the transfection capacity of solid lipid nanoparticles (SLNs) by correlating it to the internalization mechanisms and intracellular trafficking of the vectors. Vectors were prepared with SLN, DNA, and protamine. ARPE-19 and HEK-293 cells were used for the evaluation of the formulations. Protamine induced a 6-fold increase in the transfection of SLNs in retinal cells due to the presence of nuclear localization signals (NLS), its protection capacity, and a shift in the internalization mechanism from caveolae/raft-mediated to clathrin-mediated endocytosis. However, protamine produced an almost complete inhibition of transfection in HEK-293 cells. In spite of the high DNA condensation capacity of protamine and its content in NLS, this does not always lead to an improvement in cell transfection since it may impair some of the limiting steps of the transfection processes.
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98
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Desai P, Patlolla RR, Singh M. Interaction of nanoparticles and cell-penetrating peptides with skin for transdermal drug delivery. Mol Membr Biol 2011; 27:247-59. [PMID: 21028936 DOI: 10.3109/09687688.2010.522203] [Citation(s) in RCA: 244] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Topical or transdermal drug delivery is challenging because the skin acts as a natural and protective barrier. Therefore, several methods have been examined to increase the permeation of therapeutic molecules into and through the skin. One approach is to use the nanoparticulate delivery system. Starting with liposomes and other vesicular systems, several other types of nanosized drug carriers have been developed such as solid lipid nanoparticles, nanostructured lipid carriers, polymer-based nanoparticles and magnetic nanoparticles for dermatological applications. This review article discusses how different particulate systems can interact and penetrate into the skin barrier. In this review, the effectiveness of nanoparticles, as well as possible mode of actions of nanoparticles, is presented. In addition to nanoparticles, cell-penetrating peptide (CPP)-mediated drug delivery into the skin and the possible mechanism of CPP-derived delivery into the skin is discussed. Lastly, the effectiveness and possible mechanism of CPP-modified nanocarriers into the skin are addressed.
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Affiliation(s)
- Pinaki Desai
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, Florida 32307, USA
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99
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Bolzinger MA, Briançon S, Chevalier Y. Nanoparticles through the skin: managing conflicting results of inorganic and organic particles in cosmetics and pharmaceutics. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 3:463-478. [PMID: 21618448 DOI: 10.1002/wnan.146] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Toxicity of nanoparticles is a current scientific issue because of the enhanced reactivity of nanomaterials and their possible easy penetration into the body arising from their small size. Because inorganic particles are present in sunscreen cosmetic products, attention has been focused on cutaneous penetration. But organic particles of various sizes are also used in pharmaceutical applications such as skin care and transdermal drug delivery. It appears that organic and inorganic particles penetrate the skin quite differently. The apparent discrepancy is addressed in this review focusing on skin penetration of inorganic sunscreen particles and organic particles for drug delivery. After a short description of the physicochemical properties of these particles, the skin penetration of both types is reviewed with emphasis on the mechanistic issues and the differences that could account for such conflicting results. It appears that investigations by cosmetic and pharmaceutical communities focused on the main issue, i.e., no toxicity in cosmetics and maximum activity of the drug in pharmaceutics. This leaves several fundamental issues as open questions and this does not allow a rigorous comparison between both types of material. While it is claimed that inorganic nanoparticles can only penetrate the outer layer of the skin, it appears that organic submicron particles and even microparticles reach the dermis in an in vitro cell. Besides particle size, the surface chemistry of the particles and the presence of other excipients in the formulations contribute to skin absorption.
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100
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Zhang LW, Al-Suwayeh SA, Hung CF, Chen CC, Fang JY. Oil components modulate the skin delivery of 5-aminolevulinic acid and its ester prodrug from oil-in-water and water-in-oil nanoemulsions. Int J Nanomedicine 2011; 6:693-704. [PMID: 21556344 PMCID: PMC3084316 DOI: 10.2147/ijn.s17524] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Indexed: 11/23/2022] Open
Abstract
The study evaluated the potential of nanoemulsions for the topical delivery of 5-aminolevulinic acid (ALA) and methyl ALA (mALA). The drugs were incorporated in oil-in-water (O/W) and water-in-oil (W/O) formulations obtained by using soybean oil or squalene as the oil phase. The droplet size, zeta potential, and environmental polarity of the nanocarriers were assessed as physicochemical properties. The O/W and W/O emulsions showed diameters of 216-256 and 18-125 nm, which, respectively, were within the range of submicron- and nano-sized dispersions. In vitro diffusion experiments using Franz-type cells and porcine skin were performed. Nude mice were used, and skin fluorescence derived from protoporphyrin IX was documented by confocal laser scanning microscopy (CLSM). The loading of ALA or mALA into the emulsions resulted in slower release across cellulose membranes. The release rate and skin flux of topical drug application were adjusted by changing the type of nanocarrier, the soybean oil O/W systems showing the highest skin permeation. This formulation increased ALA flux via porcine skin to 180 nmol/cm(2)/h, which was 2.6-fold that of the aqueous control. The CLSM results showed that soybean oil systems promoted mALA permeation to deeper layers of the skin from ∼100 μm to ∼140 μm, which would be beneficial for treating subepidermal and subcutaneous lesions. Drug permeation from W/O systems did not surpass that from the aqueous solution. An in vivo dermal irritation test indicated that the emulsions were safe for topical administration of ALA and mALA.
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Affiliation(s)
- Li-Wen Zhang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan, Taiwan
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