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Spanlastics as a Potential Platform for Enhancing the Brain Delivery of Flibanserin: In Vitro Response-Surface Optimization and In Vivo Pharmacokinetics Assessment. Pharmaceutics 2022; 14:pharmaceutics14122627. [PMID: 36559120 PMCID: PMC9786754 DOI: 10.3390/pharmaceutics14122627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/20/2022] [Accepted: 11/23/2022] [Indexed: 11/29/2022] Open
Abstract
Flibanserin was licensed by the United States Food and Drug Administration (FDA) as an oral non-hormonal therapy for pre-menopausal women with inhibited sexual desire disorder. However, it suffers from susceptibility to first-pass metabolism in the liver, low aqueous solubility, and degradation in the acidic stomach environment. Such hurdles result in a limited oral bioavailability of 33%. Thus, the aim of the study was to utilize the principles of nanotechnology and the benefits of an intranasal route of administration to develop a formulation that could bypass these drawbacks. A response-surface randomized D-optimal strategy was used for the formulation of flibanserin spanlastics (SPLs) with reduced size and increased absolute zeta potential. Two numerical factors were studied, namely the Span 60: edge activator ratio (w/w) and sonication time (min), in addition to one categorical factor that deals with the type of edge activator. Particle size (nm) and zeta potential (mV) were studied as responses. A mathematical optimization method was implemented for predicting the optimized levels of the variables. The optimized formulation was prepared using a Span: sodium deoxycholate ratio of 8:2 w/w; a sonication time of 5 min showed particle sizes of 129.70 nm and a zeta potential of -33.17 mV. Further in vivo assessment following intranasal administration in rats showed boosted plasma and brain levels, with 2.11- and 2.23-fold increases (respectively) compared to raw FLB. The aforementioned results imply that the proposed spanlastics could be regarded as efficient drug carriers for the trans-nasal delivery of drugs to the brain.
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2
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Iontophoretic delivery of dexamethasone-loaded nanoparticles to the anterior segment of the eye. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jang D, Tang J, Schwendeman SP, Prausnitz MR. Effect of Surface Interactions on Microsphere Loading in Dissolving Microneedle Patches. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29577-29587. [PMID: 35732055 PMCID: PMC9264316 DOI: 10.1021/acsami.2c05795] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Microneedle (MN) patches enable simple self-administration of drugs via the skin. In this study, we sought to deliver drug-loaded microspheres (MSs) using MN patches and found that the poly(lactic-co-glycolic acid) (PLGA) MSs failed to localize in the MN tips during fabrication, thereby decreasing their delivered dose and delivery efficiency into skin. We determined that surface interactions between the hydrophobic MSs and the poly(dimethylsiloxane) (PDMS) mold caused MSs to adhere to the mold surface during casting in aqueous formulations, with hydrophobic interactions largely responsible for adhesion. Further studies with polystyrene MSs that similarly carry a negative charge like the PLGA MSs demonstrated both repulsive electrostatic interactions as well as adhesive hydrophobic interactions. Reducing hydrophobic interactions by addition of a surfactant or modifying mold surface properties increased MS loading into MN tips and delivery into porcine skin ex vivo by 3-fold. We conclude that surface interactions affect the loading of hydrophobic MSs into MN patches during aqueous fabrication procedures and that their modulation with the surfactant can increase loading and delivery efficiency.
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Affiliation(s)
- Derek Jang
- Wallace
H. Coulter Department of Biomedical Engineering at Georgia Tech and
Emory University, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jie Tang
- Department
of Pharmaceutical Sciences and the Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Steven P. Schwendeman
- Department
of Pharmaceutical Sciences and the Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mark R. Prausnitz
- Wallace
H. Coulter Department of Biomedical Engineering at Georgia Tech and
Emory University, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Qiu X, Li S, Li X, Xiao Y, Li S, Fen Q, Kang X, Zhen P. Experimental study of β-TCP scaffold loaded with VAN/PLGA microspheres in the treatment of infectious bone defects. Colloids Surf B Biointerfaces 2022; 213:112424. [PMID: 35227993 DOI: 10.1016/j.colsurfb.2022.112424] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 02/14/2022] [Accepted: 02/21/2022] [Indexed: 10/19/2022]
Abstract
Antibiotic bone cement filling technology has been widely used in the treatment of infectious bone defects for decades. However, the current treatment requires multiple complicated procedures, which would lead to pain and financial burden for patients. Repairing bone defects and control infection at the same time is the pain spot of orthopaedic area. In this study, we develop a composite scaffold that aiming at effectively repair infectious bone defects simultaneously. Vancomycin hydrochloride(Van) /Poly(lactic-co-glycolic) acid(PLGA) microspheres prepared by double emulsion method were successfully loaded into β-tricalcium phosphate scaffold through electrostatic and physical crosslinking. Full characterization, including mechanical properties, biocompatibility, in vitro release profile and antibacterial properties of the composite scaffolds(CPSFs) were performed. The rabbit osteomyelitis model based on big hole and small hole methods was established. Pharmacodynamics study, including the local bacteriostatic and osteogenic ability were evaluated by X-ray, Micro-CT and histopathology at 4 months after surgery. These findings indicate that a reliable rabbit model of local bone defect infection successfully established by big hole approach. The CPSFs with significant histocompatibility and biocompatibility could sustained release vancomycin for extended duration. It exhibited great application potential in clinical aim at the indication of local infectious bone defects.
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Affiliation(s)
- Xiaoming Qiu
- Lanzhou University Second Hospital, Lanzhou 730000, China
| | - Songkai Li
- Department of the orthopaedic centre, The 940th Hospital of Logistics Support Force of PLA, Lanzhou 730000, China
| | - Xun Li
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yating Xiao
- School of Molecular Medicine, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
| | - Shengtang Li
- Lanzhou University Second Hospital, Lanzhou 730000, China
| | - Qiangsheng Fen
- Department of the orthopaedic centre, The 940th Hospital of Logistics Support Force of PLA, Lanzhou 730000, China
| | - Xuewen Kang
- Lanzhou University Second Hospital, Lanzhou 730000, China
| | - Ping Zhen
- Lanzhou University Second Hospital, Lanzhou 730000, China; Department of the orthopaedic centre, The 940th Hospital of Logistics Support Force of PLA, Lanzhou 730000, China
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Unsunnidhal L, Wasito R, Nugraha Setyawan EM, Warsani Z, Kusumawati A. Potential of polylactic-co-glycolic acid (PLGA) for delivery Jembrana disease DNA vaccine Model (pEGFP-C1-tat). J Vet Sci 2021; 22:e76. [PMID: 34697922 PMCID: PMC8636661 DOI: 10.4142/jvs.2021.22.e76] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/26/2021] [Accepted: 08/03/2021] [Indexed: 11/20/2022] Open
Abstract
Background The development of a vaccine for Jembrana disease is needed to prevent losses in Indonesia's Bali cattle industry. A DNA vaccine model (pEGFP-C1-tat) that requires a functional delivery system will be developed. Polylactic-co-glycolic acid (PLGA) may have potential as a delivery system for the vaccine model. Objectives This study aims to evaluate the in vitro potential of PLGA as a delivery system for pEGFP-C1-tat. Methods Consensus and codon optimization for the tat gene was completed using a bioinformatic method, and the product was inserted into a pEGFP-C1 vector. Cloning of the pEGFP-C1-tat was successfully performed, and polymerase chain reaction (PCR) and restriction analysis confirmed DNA isolation. PLGA-pEGFP-C1-tat solutions were prepared for encapsulated formulation testing, physicochemical characterization, stability testing with DNase I, and cytotoxicity testing. The PLGA-pEGFP-C1-tat solutions were transfected in HeLa cells, and gene expression was observed by fluorescent microscopy and real-time PCR. Results The successful acquisition of transformant bacteria was confirmed by PCR. The PLGA:DNA:polyvinyl alcohol ratio formulation with optimal encapsulation was 4%:0.5%:2%, physicochemical characterization of PLGA revealed a polydispersity index value of 0.246, a particle size of 925 nm, and a zeta potential value of −2.31 mV. PLGA succeeded in protecting pEGFP-C1-tat from enzymatic degradation, and the percentage viability from the cytotoxicity test of PLGA-pEGFP-C1-tat was 98.03%. The PLGA-pEGFP-C1-tat demonstrated luminescence of the EGFP-tat fusion protein and mRNA transcription was detected. Conclusions PLGA has good potential as a delivery system for pEGFP-C1-tat.
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Affiliation(s)
- Lalu Unsunnidhal
- Department of Reproduction and Obstetrics, Faculty of Veterinary Medicine, University Gadjah Mada, Yogyakarta 55281, Indonesia.,Biomedical Field, Nursing Study Program, STIKES Yarsi Mataram, West Nusa Tenggara 83361, Indonesia
| | - Raden Wasito
- Department of Pathology, Faculty of Veterinary Medicine, University Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Erif Maha Nugraha Setyawan
- Department of Reproduction and Obstetrics, Faculty of Veterinary Medicine, University Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Ziana Warsani
- Research Center of Biotechnology, University Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Asmarani Kusumawati
- Department of Reproduction and Obstetrics, Faculty of Veterinary Medicine, University Gadjah Mada, Yogyakarta 55281, Indonesia.,Department of Pathology, Faculty of Veterinary Medicine, University Gadjah Mada, Yogyakarta 55281, Indonesia.
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Sawant A, Kamath S, KG H, Kulyadi GP. Solid-in-Oil-in-Water Emulsion: An Innovative Paradigm to Improve Drug Stability and Biological Activity. AAPS PharmSciTech 2021; 22:199. [PMID: 34212274 PMCID: PMC8249250 DOI: 10.1208/s12249-021-02074-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/14/2021] [Indexed: 12/13/2022] Open
Abstract
Abstract An emulsion is a biphasic dosage form comprising of dispersed phase containing droplets that are uniformly distributed into a surrounding liquid which forms the continuous phase. An emulsifier is added at the interface of two immiscible liquids to stabilize the thermodynamically unstable emulsion. Various types of emulsions such as water-in-oil (w-o), oil-in-water (o-w), microemulsions, and multiple emulsions are used for delivering certain drugs in the body. Water (aqueous) phase is commonly used for encapsulating proteins and several other drugs in water-in-oil-in-water (w-o-w) emulsion technique. But this method has posed certain problems such as decreased stability, burst release, and low entrapment efficiency. Thus, a novel “solid-in-oil-in-water” (s-o-w) emulsion system was developed for formulating certain drugs, probiotics, proteins, antibodies, and tannins to overcome these issues. In this method, the active ingredient is encapsulated as a solid and added to an oil phase, which formed a solid-oil dispersion. This dispersion was then mixed with water to form a continuous phase for enhancing the drug absorption. This article focuses on the various studies done to investigate the effectiveness of formulations prepared as solid-oil-water emulsions in comparison to conventional water-oil-water emulsions. A summary of the results obtained in each study is presented in this article. The s-o-w emulsion technique may become beneficial in near future as it has shown to improve the stability and efficacy of the entrapped active ingredient. Graphical abstract ![]()
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Seo H, Nam C, Kim E, Son J, Lee H. Aqueous Two-Phase System (ATPS)-Based Polymersomes for Particle Isolation and Separation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:55467-55475. [PMID: 33237722 DOI: 10.1021/acsami.0c16968] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Aqueous two-phase systems (ATPSs) have been widely used in the separation, purification, and enrichment of biomolecules for their excellent biocompatibility. While ultracentrifugation and microfluidic devices have been combined with ATPS to facilitate the separation of biomolecules and achieve high recovery yields, they often lack the ability to effectively isolate and separate biomolecules in low concentrations. In this work, we present a strategy that leverages the preferential partitioning of biomolecules in ATPS droplets to efficiently separate model extracellular vesicle (EV) particles. We demonstrate that the additional oil phase between the inner ATPS droplets and the aqueous continuous phase in triple emulsion droplets resolves the size controllability and instability issues of ATPS droplets, enabling the production of highly monodisperse ATPS-based polymersomes with enhanced stability for effective isolation of ATPS droplets from the surrounding environment. Furthermore, we achieve separation of model EV particles in a single dextran (DEX)-rich droplet by the massive production of ATPS-based polymersomes and osmotic-pressure-induced rupture of the selected polymersome in a hypertonic solution composed of poly(ethylene glycol) (PEG).
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Affiliation(s)
- Hanjin Seo
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
| | - Changwoo Nam
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
- Organic Materials and Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deogjin-dong, Deokjin-gu, Jeonju, Jeollabuk-do 54896, Korea
| | - Eunseo Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
| | - Juhyun Son
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
| | - Hyomin Lee
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
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Ramirez JC, Flores-Villaseñor SE, Vargas-Reyes E, Herrera-Ordonez J, Torres-Rincón S, Peralta-Rodríguez RD. Preparation of PDLLA and PLGA nanoparticles stabilized with PVA and a PVA-SDS mixture: Studies on particle size, degradation and drug release. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101907] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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9
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Mietzner R, Kade C, Froemel F, Pauly D, Stamer WD, Ohlmann A, Wegener J, Fuchshofer R, Breunig M. Fasudil Loaded PLGA Microspheres as Potential Intravitreal Depot Formulation for Glaucoma Therapy. Pharmaceutics 2020; 12:pharmaceutics12080706. [PMID: 32727014 PMCID: PMC7464914 DOI: 10.3390/pharmaceutics12080706] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/21/2020] [Accepted: 07/23/2020] [Indexed: 12/12/2022] Open
Abstract
Rho-associated protein kinase (ROCK) inhibitors allow for causative glaucoma therapy. Unfortunately, topically applied ROCK inhibitors suffer from high incidence of hyperemia and low intraocular bioavailability. Therefore, we propose the use of poly (lactide-co-glycolide) (PLGA) microspheres as a depot formulation for intravitreal injection to supply outflow tissues with the ROCK inhibitor fasudil over a prolonged time. Fasudil-loaded microspheres were prepared by double emulsion solvent evaporation technique. The chemical integrity of released fasudil was confirmed by mass spectrometry. The biological activity was measured in cell-based assays using trabecular meshwork cells (TM cells), Schlemm’s canal cells (SC cells), fibroblasts and adult retinal pigment epithelium cells (ARPE-19). Cellular response to fasudil after its diffusion through vitreous humor was investigated by electric cell-substrate impedance sensing. Microspheres ranged in size from 3 to 67 µm. The release of fasudil from microspheres was controllable and sustained for up to 45 days. Released fasudil reduced actin stress fibers in TM cells, SC cells and fibroblasts. Decreased collagen gel contraction provoked by fasudil was detected in TM cells (~2.4-fold), SC cells (~1.4-fold) and fibroblasts (~1.3-fold). In addition, fasudil readily diffused through vitreous humor reaching its target compartment and eliciting effects on TM cells. No negative effects on ARPE-19 cells were observed. Since fasudil readily diffuses through the vitreous humor, we suggest that an intravitreal drug depot of ROCK inhibitors could significantly improve current glaucoma therapy particularly for patients with comorbid retinal diseases.
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Affiliation(s)
- Raphael Mietzner
- Department of Pharmaceutical Technology, University of Regensburg, Universitaetsstrasse 31, 93040 Regensburg, Germany;
| | - Christian Kade
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitaetsstrasse 31, 93040 Regensburg, Germany; (C.K.); (J.W.)
| | - Franziska Froemel
- Department of Human Anatomy and Embryology, University of Regensburg, Universitaetsstrasse 31, 93040 Regensburg, Germany; (F.F.); (R.F.)
| | - Diana Pauly
- Experimental Ophthalmology, University Hospital Regensburg, Franz Josef Strauss Allee 11, 93053 Regensburg, Germany;
| | - W. Daniel Stamer
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA;
| | - Andreas Ohlmann
- Department of Ophthalmology, Ludwig-Maximilians-University Munich, Mathildenstrasse 8, 80336 Munich, Germany;
| | - Joachim Wegener
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitaetsstrasse 31, 93040 Regensburg, Germany; (C.K.); (J.W.)
- Fraunhofer Research Institution for Microsystems and Solid State Technologies EMFT, Universitaetsstrasse 31, 93040 Regensburg, Germany
| | - Rudolf Fuchshofer
- Department of Human Anatomy and Embryology, University of Regensburg, Universitaetsstrasse 31, 93040 Regensburg, Germany; (F.F.); (R.F.)
| | - Miriam Breunig
- Department of Pharmaceutical Technology, University of Regensburg, Universitaetsstrasse 31, 93040 Regensburg, Germany;
- Correspondence: ; Tel.: +49-(0)-941-943-4828
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Zhang Y, Mustapha AN, Zhang X, Baiocco D, Wellio G, Davies T, Zhang Z, Li Y. Improved volatile cargo retention and mechanical properties of capsules via sediment-free in situ polymerization with cross-linked poly(vinyl alcohol) as an emulsifier. J Colloid Interface Sci 2020; 568:155-164. [PMID: 32088446 DOI: 10.1016/j.jcis.2020.01.115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 10/25/2022]
Abstract
HYPOTHESIS It is hypothesized that poly(vinyl alcohol) (PVOH) as an emulsifier destabilizes the insoluble molecular aggregates by increasing interparticle interactions and their tendency toward agglomeration into large particle aggregates during the encapsulation process of one-step in situ polymerization. Porosity of capsule shells is expected to decrease with reducing agglomeration tendency to allow dense packing of smaller insoluble aggregates. Cross-linking the polymer network further reduces shell permeability to improve the retention of volatile cargos. PVOH also modifies the short-range order of polymer network to bestow improved mechanical properties in addition to the shell thickening effect at appropriate synthesis conditions. EXPERIMENTS PVOH was used to stabilize a heptane-in-water emulsion as a template for producing capsules via one-step in situ polymerization. Shell morphologies at different PVOH concentrations were compared. Physical freeze-thawing and chemical cross-linking were adopted separately to synthesize capsules with a volatile cargo, and its retention was characterized qualitatively by a solvatochromism-based fluorescent method and quantitative payload calculation. Mechanical properties of capsules were tested with micromanipulation. The effect of graphene oxide (GO) impregnation into capsules was studied with various co-emulsifiers. FINDINGS When PVOH alone was used as the emulsifier for capsule synthesis, the higher its concentration, the more porous the shell structure was. At very low concentrations, visible pores were eliminated. Freeze-thaw cycles reduced the permeability of capsule shells when visible pores were absent. Chemical cross-linking with poly(acrylic acid) (PAA) significantly improved the retention of volatile cargo heptane. PVOH substantially reduced polymer sediment during capsule synthesis, which eliminated the tedious centrifugation procedure that normally would have followed. Superior mechanical strength of capsules was achieved with PAA cross-linked PVOH at appropriate conditions. The impregnation of aqueously dispersed GO into capsules was also promoted by using PVOH but not hydrocolloid emulsifiers.
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Affiliation(s)
- Yan Zhang
- Birmingham Centre for Energy Storage (BCES), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom; Micromanipulation and Microencapsulation Research Group (MCAP), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom
| | - Abdullah Naseer Mustapha
- Birmingham Centre for Energy Storage (BCES), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom; Micromanipulation and Microencapsulation Research Group (MCAP), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom
| | - Xiaotong Zhang
- Micromanipulation and Microencapsulation Research Group (MCAP), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom
| | - Daniele Baiocco
- Micromanipulation and Microencapsulation Research Group (MCAP), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom
| | - Gilmore Wellio
- Birmingham Centre for Energy Storage (BCES), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom; Micromanipulation and Microencapsulation Research Group (MCAP), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom
| | - Thomas Davies
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, Wales CF10 3AT, United Kingdom
| | - Zhibing Zhang
- Micromanipulation and Microencapsulation Research Group (MCAP), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom.
| | - Yongliang Li
- Birmingham Centre for Energy Storage (BCES), School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, United Kingdom.
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Almeida B, Wang Y, Shukla A. Effects of Nanoparticle Properties on Kartogenin Delivery and Interactions with Mesenchymal Stem Cells. Ann Biomed Eng 2019; 48:2090-2102. [DOI: 10.1007/s10439-019-02430-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 12/02/2019] [Indexed: 12/15/2022]
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Haryadi BM, Hafner D, Amin I, Schubel R, Jordan R, Winter G, Engert J. Nonspherical Nanoparticle Shape Stability Is Affected by Complex Manufacturing Aspects: Its Implications for Drug Delivery and Targeting. Adv Healthc Mater 2019; 8:e1900352. [PMID: 31410996 DOI: 10.1002/adhm.201900352] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/05/2019] [Indexed: 02/04/2023]
Abstract
The shape of nanoparticles is known recently as an important design parameter influencing considerably the fate of nanoparticles with and in biological systems. Several manufacturing techniques to generate nonspherical nanoparticles as well as studies on in vitro and in vivo effects thereof have been described. However, nonspherical nanoparticle shape stability in physiological-related conditions and the impact of formulation parameters on nonspherical nanoparticle resistance still need to be investigated. To address these issues, different nanoparticle fabrication methods using biodegradable polymers are explored to produce nonspherical nanoparticles via the prevailing film-stretching method. In addition, systematic comparisons to other nanoparticle systems prepared by different manufacturing techniques and less biodegradable materials (but still commonly utilized for drug delivery and targeting) are conducted. The study evinces that the strong interplay from multiple nanoparticle properties (i.e., internal structure, Young's modulus, surface roughness, liquefaction temperature [glass transition (Tg ) or melting (Tm )], porosity, and surface hydrophobicity) is present. It is not possible to predict the nonsphericity longevity by merely one or two factor(s). The most influential features in preserving the nonsphericity of nanoparticles are existence of internal structure and low surface hydrophobicity (i.e., surface-free energy (SFE) > ≈55 mN m-1 , material-water interfacial tension <6 mN m-1 ), especially if the nanoparticles are soft (<1 GPa), rough (Rrms > 10 nm), porous (>1 m2 g-1 ), and in possession of low bulk liquefaction temperature (<100 °C). Interestingly, low surface hydrophobicity of nanoparticles can be obtained indirectly by the significant presence of residual stabilizers. Therefore, it is strongly suggested that nonsphericity of particle systems is highly dependent on surface chemistry but cannot be appraised separately from other factors. These results and reviews allot valuable guidelines for the design and manufacturing of nonspherical nanoparticles having adequate shape stability, thereby appropriate with their usage purposes. Furthermore, they can assist in understanding and explaining the possible mechanisms of nonspherical nanoparticles effectivity loss and distinctive material behavior at the nanoscale.
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Affiliation(s)
- Bernard Manuel Haryadi
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
| | - Daniel Hafner
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Ihsan Amin
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Rene Schubel
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Rainer Jordan
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Gerhard Winter
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
| | - Julia Engert
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
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Eldeeb AE, Salah S, Ghorab M. Formulation and evaluation of cubosomes drug delivery system for treatment of glaucoma: Ex-vivo permeation and in-vivo pharmacodynamic study. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.04.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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14
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Optimization of preparation method by W/O/W emulsion for entrapping metformin hydrochloride into poly (lactic acid) microparticles using Box-Behnken design. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Bee SL, Hamid ZAA, Mariatti M, Yahaya BH, Lim K, Bee ST, Sin LT. Approaches to Improve Therapeutic Efficacy of Biodegradable PLA/PLGA Microspheres: A Review. POLYM REV 2018. [DOI: 10.1080/15583724.2018.1437547] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Soo-Ling Bee
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - Z. A. Abdul Hamid
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - M. Mariatti
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - B. H. Yahaya
- Regenerative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Penang, Malaysia
| | - Keemi Lim
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - Soo-Tueen Bee
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang, Selangor, Malaysia
| | - Lee Tin Sin
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang, Selangor, Malaysia
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16
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Luo M, Jia YY, Jing ZW, Li C, Zhou SY, Mei QB, Zhang BL. Construction and optimization of pH-sensitive nanoparticle delivery system containing PLGA and UCCs-2 for targeted treatment of Helicobacter pylori. Colloids Surf B Biointerfaces 2018; 164:11-19. [PMID: 29367052 DOI: 10.1016/j.colsurfb.2018.01.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 01/04/2018] [Accepted: 01/08/2018] [Indexed: 12/14/2022]
Abstract
The acidic environment of the stomach is a threat to the curative effect of antimicrobial drugs for the eradication of Helicobacter pylori (H. pylori) in the infected area. The conventional clinical formulations of antibiotics have low specificity to H. pylori, which disrupts the normal balance of intestinal microbiomes. Therefore, oral drug delivery system with better stability at low pH as well as higher specificity to target H. pylori would provide more effective strategy to eradicate H. pylori and reduce the side effect of antibiotics. Based on the construction of UreI-mediated targeted drug delivery system developed by our group, in this work, using urea-modified UCCs-2 as targeting moiety to the UreI channel protein which is specifically expressed on H. pylori, pH-sensitive amoxicillin-loaded AMX-PLGA/UCCs-2 nanoparticles produced by UCCs-2 and PLGA for targeted treatment of H. pylori infection were established. The nanoparticles were prepared by double emulsion-solvent evaporation method. To achieve a promising drug delivery system with favorable pH-sensitive properties, we adopted an orthogonal design to obtain the optimal formulation. The results showed that the optimized AMX-PLGA/UCCs-2 nanoparticles were in a favorable pH sensitive manner and exhibited low cytotoxicity, higher specificity and better anti-H. pylori efficiency than amoxicillin and non-targeting AMX-PLGA/Cs nanoparticle both in vitro and in vivo, which can protect the antimicrobial drugs against acidic environment and deliver them to targeted eradicate H. pylori in the infected location. The cellular uptake mechanism showed that AMX-PLGA/UCCs-2 nanoparticles are an effective UreI-mediated targeted drug delivery system for anti-H. pylori treatment, which can also be used as promising nanocarriers for oral delivery of other therapeutic drugs to targeted treat H. pylori.
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Affiliation(s)
- Min Luo
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, China
| | - Yi-Yang Jia
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, China
| | - Zi-Wei Jing
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, China
| | - Chen Li
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Si-Yuan Zhou
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, China; Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Qi-Bing Mei
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Bang-Le Zhang
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, China; Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an, 710032, China.
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17
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Salah S, Mahmoud AA, Kamel AO. Etodolac transdermal cubosomes for the treatment of rheumatoid arthritis: ex vivo permeation and in vivo pharmacokinetic studies. Drug Deliv 2017; 24:846-856. [PMID: 28535740 PMCID: PMC8240986 DOI: 10.1080/10717544.2017.1326539] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 04/27/2017] [Accepted: 05/02/2017] [Indexed: 01/28/2023] Open
Abstract
In this study, transdermal etodolac-loaded cubosomes were developed in order to relieve patient pain and joints stiffness by providing stable etodolac concentration at the targeting sites through controlled drug delivery via the noninvasive skin route with more sustaining and less frequent dosing. Different ratios and percentages of poloxamer 407 and monoolein were used to formulate the cubosomes using emulsification and homogenization processes. The etodolac-loaded cubosomes showed particle size values ranging from 135.95 to 288.35 nm and zeta potential values ranging from -18.40 to -36.10 mV. All the cubosomes offered an encapsulation efficiency value of about 100% and showed drug loading capacity ranging from 1.28 to 6.09%. The in vitro drug release studies revealed a controlled drug release profile with a drug release rate up to 15.08%/h. Increasing poloxamer concentration in etodolac-loaded cubosomes resulted in nanoparticles with less particle size and faster drug release. The particles exhibited cubic and hexagonal shapes. The DSC and X-ray analysis demonstrated that the drug was encapsulated in the cubosomes bicontinuous structures in amorphous form. In addition, investigated cubosomes exhibited fast drug penetration through excited mice skin followed by slower drug penetration for up to 24 h. The pharmacokinetic study in human volunteers showed that the selected etodolac-loaded cubosomes enhanced the bioavailability of etodolac as compared to the oral capsules (266.11%) with evidence of longer half-life and higher MRT that reached 18.86 and 29.55 h, respectively. The etodolac-loaded cubosomes propose a promising system for treatment of arthritis simply through skin application.
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Affiliation(s)
- Salwa Salah
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt
| | - Azza A. Mahmoud
- Department of Pharmaceutical Technology, National Research Center, Dokki, Cairo, Egypt
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt, Cairo, Egypt, and
| | - Amany O. Kamel
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, Egypt
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18
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Zhuang J, Fang RH, Zhang L. Preparation of particulate polymeric therapeutics for medical applications. SMALL METHODS 2017; 1:1700147. [PMID: 30310860 PMCID: PMC6176868 DOI: 10.1002/smtd.201700147] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Particulate therapeutics fabricated from polymeric materials have become increasingly popular over the past several decades. Generally, polymeric systems are easy to synthesize and have tunable parameters, giving them significant potential for wide use in the clinic. They come in many different forms, including as nanoparticles, microparticles, and colloidal gels. In this review, we discuss the current preparation methods for each type of platform, as well as some representative applications. To achieve enhanced performance, lipid coatings and other surface modification techniques for introducing additional functionality are also mentioned. We hope that, by outlining the various methods and techniques for their preparation, it will be possible to provide insights into the utility of these polymeric platforms and further encourage their development for biomedical applications.
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Affiliation(s)
- Jia Zhuang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Ronnie H Fang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Liangfang Zhang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
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19
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Fashandi M, Leung SN. Preparation and characterization of 100% bio-based polylactic acid/palmitic acid microcapsules for thermal energy storage. MATERIALS FOR RENEWABLE AND SUSTAINABLE ENERGY 2017; 6:14. [PMID: 31259138 PMCID: PMC6560517 DOI: 10.1007/s40243-017-0098-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Accepted: 06/24/2017] [Indexed: 06/09/2023]
Abstract
Phase change materials (PCM) have gained extensive attention in thermal energy storage applications. In this work, microencapsulation of vegetable-derived palmitic acid (PA) in bio-based polylactic acid (PLA) shell by solvent evaporation and oil-in-water emulsification was investigated. Fourier transform infrared spectroscopy and scanning electron microscopy were conducted to confirm the successful encapsulation of PA in PLA shells. Differential scanning calorimetry was performed to evaluate the thermal properties, thermal reliability, and core content of the fabricated PCM microcapsules (microPCM). Through a series of parametric studies, the effects of PCM and solvent content, oil phase-to-aqueous phase ratio, as well as surfactant type and content on the morphology, particle size, and thermal properties of the PCM microcapsules were investigated. Experimental results showed that PVA was a superior emulsifier to SDS in the emulsion systems being studied. There also existed an optimal PVA concentration to reduce the average size of microPCM. When the PVA concentration was above this optimal level, the emulsifier molecules tend to form micelles among themselves. This led to the adhesion of tiny microspheres on the surface of microPCM as well as larger microPCM. In short, this work has demonstrated the possibility of using the solvent evaporation method to fabricate 100% bio-based PCM-polymer microcapsules for thermal energy storage applications.
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Affiliation(s)
- Maryam Fashandi
- Department of Mechanical Engineering, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3 Canada
| | - Siu N. Leung
- Department of Mechanical Engineering, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3 Canada
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20
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Shaikh MV, Kala M, Nivsarkar M. Formulation and optimization of doxorubicin loaded polymeric nanoparticles using Box-Behnken design: ex-vivo stability and in-vitro activity. Eur J Pharm Sci 2017; 100:262-272. [DOI: 10.1016/j.ejps.2017.01.026] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 12/31/2016] [Accepted: 01/22/2017] [Indexed: 01/18/2023]
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21
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Holmkvist AD, Friberg A, Nilsson UJ, Schouenborg J. Hydrophobic ion pairing of a minocycline/Ca 2+ /AOT complex for preparation of drug-loaded PLGA nanoparticles with improved sustained release. Int J Pharm 2016; 499:351-357. [DOI: 10.1016/j.ijpharm.2016.01.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/28/2015] [Accepted: 01/05/2016] [Indexed: 01/14/2023]
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22
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Ramazani F, Chen W, van Nostrum CF, Storm G, Kiessling F, Lammers T, Hennink WE, Kok RJ. Strategies for encapsulation of small hydrophilic and amphiphilic drugs in PLGA microspheres: State-of-the-art and challenges. Int J Pharm 2016; 499:358-367. [DOI: 10.1016/j.ijpharm.2016.01.020] [Citation(s) in RCA: 162] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 01/08/2016] [Accepted: 01/09/2016] [Indexed: 11/27/2022]
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23
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He J, Li H, Liu C, Wang G, Ge L, Ma S, Huang L, Yan S, Xu X. Formulation and evaluation of poly(lactic-co-glycolic acid) microspheres loaded with an altered collagen type II peptide for the treatment of rheumatoid arthritis. J Microencapsul 2015; 32:608-17. [DOI: 10.3109/02652048.2015.1065924] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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24
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Petra Š, Renata A, Věra K, Ernesto R, Tomáš S, Miroslav P. Supercritical Assisted Atomization of emulsions for encapsulation of 1-monoacylglycerols in an hydrophilic carrier. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2014.11.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Poly (Vinyl Alcohol) in Fabrication of PLA Micro- and Nanoparticles Using Emulsion and Solvent Evaporation Technique. ACTA ACUST UNITED AC 2014. [DOI: 10.4028/www.scientific.net/amr.1024.296] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Poly (vinyl alcohol) (PVAL) was a common stabilizing agent used in formulate polymeric drug encapsulated micro-/nanoparticles. In preparing poly (lactic acid) (PLA) micro-/nanoparticles by emulsion and solvent evaporation (ESE) technique, the particle size and distribution have shown dependent on PVAL concentration. The focused of this project was to investigate the PVAL function in relation to significant changes in particle size. These studies were relatively important, as it was the basic studies of material usage in ESE fabricating process. The function of PVAL as, either surfactant that able to reduce interfacial tension or stabilizer to provide steric stability was further investigated by measuring the interfacial tension (IFT) of two liquids and zeta potential of the particles. As PVAL concentration increased, the reduction of IFT was only pronounced at the early stage of PVAL incorporation from 16.02 m N/m (absence of PVAL) to 2.0 m N/m (presence of 1 % PVAL), while zeta potential of particles was gradually decreased from-25 mV to-10.2 mV. As conclusion, the presence of PVAL could reduce the interfacial tension. However, to further stabilize the particle (e.g. reduce size and narrow size distribution) in the fabrication process, the steric stabilization provided by PVAL give more significant advantages.
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26
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Grumezescu V, Holban AM, Grumezescu AM, Socol G, Ficai A, Vasile BS, Truscă R, Bleotu C, Lazar V, Chifiriuc CM, Mogosanu GD. Usnic acid-loaded biocompatible magnetic PLGA-PVA microsphere thin films fabricated by MAPLE with increased resistance to staphylococcal colonization. Biofabrication 2014; 6:035002. [PMID: 24722318 DOI: 10.1088/1758-5082/6/3/035002] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Due to their persistence and resistance to the current therapeutic approaches, Staphylococcus aureus biofilm-associated infections represent a major cause of morbidity and mortality in the hospital environment. Since (+)-usnic acid (UA), a secondary lichen metabolite, possesses antimicrobial activity against Gram-positive cocci, including S. aureus, the aim of this study was to load magnetic polylactic-co-glycolic acid-polyvinyl alcohol (PLGA-PVA) microspheres with UA, then to obtain thin coatings using matrix-assisted pulsed laser evaporation and to quantitatively assess the capacity of the bio-nano-active modified surface to control biofilm formation by S. aureus, using a culture-based assay. The UA-loaded microspheres inhibited both the initial attachment of S. aureus to the coated surfaces, as well as the development of mature biofilms. In vitro bioevalution tests performed on the fabricated thin films revealed great biocompatibility, which may endorse them as competitive candidates for the development of improved non-toxic surfaces resistant to S. aureus colonization and as scaffolds for stem cell cultivation and tissue engineering.
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Affiliation(s)
- V Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu Street no 1-7, 011061 Bucharest, Romania. Lasers Department, Plasma and Radiation Physics, National Institute for Lasers, PO Box MG-36, Bucharest-Magurele, Romania
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27
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Bastari K, Arshath M, Ng ZHM, Chia JH, Yow ZXD, Sana B, Tan MFC, Lim S, Loo SCJ. A controlled release of antibiotics from calcium phosphate-coated poly(lactic-co-glycolic acid) particles and their in vitro efficacy against Staphylococcus aureus biofilm. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:747-57. [PMID: 24370968 DOI: 10.1007/s10856-013-5125-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 12/13/2013] [Indexed: 05/28/2023]
Abstract
Ceramic-polymer hybrid particles, intended for osteomyelitis treatment, were fabricated by preparing poly(lactic-co-glycolic acid) particles through an emulsion solvent evaporation technique, followed by calcium phosphate (CaP) coating via a surface adsorption-nucleation method. The presence of CaP coating on the surface of the particles was confirmed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. Subsequently, two antibiotics for treating bone infection, nafcillin (hydrophilic) and levofloxacin (amphiphilic), were loaded into these hybrid particles and their in vitro drug release studies were investigated. The CaP coating was shown to reduce burst release, while providing sustained release of the antibiotics for up to 4 weeks. In vitro bacterial study against Staphylococcus aureus demonstrated the capability of these antibiotic-loaded hybrid particles to inhibit biofilm formation as well as deteriorate established biofilm, making this hybrid system a potential candidate for further investigation for osteomyelitis treatment.
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Affiliation(s)
- Kelsen Bastari
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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28
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Turk CTS, Oz UC, Serim TM, Hascicek C. Formulation and optimization of nonionic surfactants emulsified nimesulide-loaded PLGA-based nanoparticles by design of experiments. AAPS PharmSciTech 2014; 15:161-76. [PMID: 24222270 DOI: 10.1208/s12249-013-0048-9] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 10/22/2013] [Indexed: 02/03/2023] Open
Abstract
This investigation aimed to develop nimesulide (NMS)-loaded poly(lactic-co-glycolic acid) (PLGA)-based nanoparticulate formulations as a biodegradable polymeric drug carrier to treat rheumatoid arthritis. Polymeric nanoparticles (NPs) were prepared with two different nonionic surfactants, vitamin E d-α-tocopheryl polyethylene glycol 1000 succinate (vitamin E TPGS) and poly(vinyl alcohol) (PVA), using an ultrasonication solvent evaporation technique. Nine batches were formulated for each surfactant using a 3(2) factorial design for optimal concentration of the emulsifying agents, 0.03-0.09% for vitamin E TPGS and 2-4% for PVA. The surfactant percentage and the drug/polymer ratio (1:10, 1:15, 1:20) of the NMS-loaded NPs were investigated based on four responses: encapsulation efficiency, particle size, the polydispersity index, and the surface charge. The response surface plots and linearity curves indicated a relationship between the experiment's responses and a set of independent variables. The NPs produced with both surfactants exhibited a negative surface charge, and scanning electron micrographs revealed that all of the NPs were spherical in shape. A narrower size distribution and higher drug loadings were achieved in PVA-emulsified PLGA NPs than in the vitamin E TPGS emulsified. Decreasing amounts of both nonionic surfactants resulted in a reduction in the emulsion's viscosity, which led to a decrease in the particle size of NPs. According to the ANOVA results obtained in this present research, vitamin E TPGS exhibited the best correlation between the independent variables, namely drug/polymer ratio and the surfactant percentage, and the dependent variables (encapsulation efficiency R(2) = 0.9603, particle size R(2) = 0.9965, size distribution R(2) = 0.9899, and surface charge R(2) = 0.8969) compared with PVA.
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29
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Development of nanoparticulate formulations for ocular delivery of prednisolone acetate: preparation and characterization. J Drug Deliv Sci Technol 2014. [DOI: 10.1016/s1773-2247(14)50026-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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30
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Shin M, Kim HK, Lee H. Dopamine-loaded poly(d,l-lactic-co-glycolic acid) microspheres: New strategy for encapsulating small hydrophilic drugs with high efficiency. Biotechnol Prog 2013; 30:215-23. [DOI: 10.1002/btpr.1835] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 10/24/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Mikyung Shin
- The Graduate School of Nanoscience and Technology; Korea Advanced Institute of Science and Technology (KAIST); 291 University Rd Daejeon 305-701 South Korea
| | - Hong Kee Kim
- Life Science R&D Center; SK Chemical Co. Ltd. 686, Sampyeong-dong, Bundang-gu Seongnam City Gyeonggi Province 463-400 South Korea
| | - Haeshin Lee
- Dept. of Chemistry; The Graduate School of Nanoscience and Technology; Korea Advanced Institute of Science and Technology (KAIST); 291 University Rd Daejeon 305-701 South Korea
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31
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Kukut M, Karal-Yilmaz O, Yagci Y. Synthesis, characterisation and drug release properties of microspheres of polystyrene with aliphatic polyester side-chains. J Microencapsul 2013; 31:254-61. [PMID: 24124883 DOI: 10.3109/02652048.2013.834993] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A series of graft copolymers consisting of polystyrene backbone with biocompatible side chains based on (co)polymers of l-lactic acid and glycolic acid were synthesised by combination two controlled polymerisations, namely, nitroxide mediated radical polymerisation (NMRP) and ring opening polymerisation (ROP) with "Click" chemistry. The main goal of this work was to design new biodegradable microspheres using obtained graft copolymers for long-term sustained release of imatinib mesylate (IMM) as a model drug. The IMM loaded microspheres of the graft copolymers, polystyrene-g-poly(lactide-co-glycolide) (PS-g-PLLGA), polystyrene-g-poly(lactic acid) (PS-g-PLLA) and poly(lactic-coglycolic acid) (PLLGA) were then prepared by a modified water-in-oil-in-water (w1/o/w2) double emulsion/solvent evaporation technique. The optimised microspheres were characterised by particle size, encapsulation efficiency, and surface morphology also; their degradation and release properties were studied in vitro. The degradation studies of three different types of microspheres showed that the PS backbone of the graft copolymers slows down the degradation rate compared to PLLGA.
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Affiliation(s)
- Manolya Kukut
- Department of Chemistry, Istanbul Tehnical University, Maslak , Istanbul 34469 , Turkey
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32
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Yerlikaya F, Ozgen A, Vural I, Guven O, Karaagaoglu E, Khan MA, Capan Y. Development and Evaluation of Paclitaxel Nanoparticles Using a Quality-by-Design Approach. J Pharm Sci 2013; 102:3748-61. [DOI: 10.1002/jps.23686] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 06/26/2013] [Accepted: 07/10/2013] [Indexed: 11/08/2022]
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33
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Gomes AJ, Espreafico EM, Tfouni E. trans-[Ru(NO)Cl(cyclam)](PF6)2 and [Ru(NO)(Hedta)] Incorporated in PLGA Nanoparticles for the Delivery of Nitric Oxide to B16–F10 Cells: Cytotoxicity and Phototoxicity. Mol Pharm 2013; 10:3544-54. [DOI: 10.1021/mp3005534] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anderson J. Gomes
- Faculdade de Ceilândia, Universidade de Brasília, Brasília, DF,
Brazil
| | - Enilza M. Espreafico
- Departamento de
Biologia Celular
e Molecular e Bioagentes Patogênicos, Faculdade de Medicina
de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Elia Tfouni
- Departamento de Química,
Faculdade de Filosofia Ciências e Letras de Ribeirão
Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
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34
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Park JH, Pérez RA, Jin GZ, Choi SJ, Kim HW, Wall IB. Microcarriers designed for cell culture and tissue engineering of bone. TISSUE ENGINEERING PART B-REVIEWS 2013; 19:172-90. [PMID: 23126371 DOI: 10.1089/ten.teb.2012.0432] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Microspherical particulates have been an attractive form of biomaterials that find usefulness in cell delivery and tissue engineering. A variety of compositions, including bioactive ceramics, degradable polymers, and their composites, have been developed into a microsphere form and have demonstrated the potential to fill defective bone and to populate tissue cells on curved matrices. To enhance the capacity of cell delivery, the conventional solid form of spheres is engineered to have either a porous structure to hold cells or a thin shell to in-situ encapsulate cells within the structure. Microcarriers can also be a potential reservoir system of bioactive molecules that have therapeutic effects in regulating cell behaviors. Due to their specific form, advanced technologies to culture cell-loaded microcarriers are required, such as simple agitation or shaking, spinner flask, and rotating chamber system. Here, we review systematically, from material design to culture technology, the microspherical carriers used for the delivery of cells and tissue engineering, particularly of bone.
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Affiliation(s)
- Jeong-Hui Park
- Biomaterials and Tissue Engineering Lab, Department of Nanobiomedical Science & WCU Research Center, Dankook University, Cheonan, South Korea
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35
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Zhang XR, Zheng Y, Jin T, Chow AHL. Formulation of sustained-release microspheres of granulocyte macrophage colony stimulating factor by freezing-induced phase separation with dextran and encapsulation with blended polymers. J Microencapsul 2011; 28:743-51. [PMID: 21967463 DOI: 10.3109/02652048.2011.615950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study aimed to assess the potential merits of formulating sustained-release microspheres of recombinant human granulocyte macrophage colony stimulating factor (rhGM-CSF) via freezing-induced phase separation (FIPS) of the protein with dextran followed by encapsulation with binary mixture of poly(lactic-co-glycolic acid) (PLGA) 2A (MW∼12K) and 3A (MW∼47K) or of PLGA2A and polylactic acid (PLA; MW∼83K). The formulated dextran particles and microspheres were characterized in vitro for loading, aggregation, bioactivity and release behavior of the protein where appropriate. rhGM-CSF retained about 60% of bioactivity with no significant aggregation after each formulation step. Encapsulation of protein-loaded dextran particles attained only 80% with the PLGA2A and PLGA3A blend, but 100% with the PLGA2A and PLA mixture. The former formulation exhibited a triphasic in-vitro release profile typical of PLGA microspheres while the latter revealed a much lower initial burst followed by a steady and complete release of rhGM-CSF with preserved bioactivity over a 15-day period.
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Affiliation(s)
- Xin-ran Zhang
- School of Pharmacy, The Chinese University of Hong Kong, Hong Kong, China
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Preparation of budesonide-loaded porous PLGA microparticles and their therapeutic efficacy in a murine asthma model. J Control Release 2010; 150:56-62. [PMID: 21070826 DOI: 10.1016/j.jconrel.2010.11.001] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 10/20/2010] [Accepted: 11/01/2010] [Indexed: 11/21/2022]
Abstract
Inhaling corticosteroids, such as budesonide (BD), is the most common treatment for asthma. However, frequent steroid administration is associated with many side effects. We hypothesized that porous microparticles containing BD could provide an effective treatment method for asthma, as the sustained delivery of corticosteroid and a reduced number of doses could be achieved using porous polymeric microparticles. Porous microparticles were prepared from poly(lactic-co-glycolic acid) (PLGA) by a water-in-oil-in-water double emulsion method with ammonium bicarbonate as the porogen. Varying the porogen concentration controlled the morphology, particle size, and pore size of the PLGA microparticles, with particle size and pore size increasing as the porogen concentration increased. The BD loading efficiency in the porous PLGA microparticles was about 60%, and BD was released from the porous microparticles in a sustained manner for 24h in vitro. Lung uptake efficiency of the porous PLGA microparticles in mice was significantly higher than that of non-porous PLGA microparticles. Budesonide-loaded porous PLGA microparticles were delivered to asthmatic mice, and the numbers of inflammatory cells in bronchoalveolar lavage (BAL) fluid and tissue sections were significantly reduced when the drug was administrated every 3days. We also found significantly reduced bronchial hyperresponsiveness of asthmatic mice after treatment with budesonide-loaded porous PLGA microparticles. This approach to controlling the porous structure of polymeric microparticles, as well as the release behavior of drugs from the microparticles, could have useful applications in the pulmonary delivery of many therapeutic drugs.
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