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Lababidi N, Sigal V, Koenneke A, Schwarzkopf K, Manz A, Schneider M. Microfluidics as tool to prepare size-tunable PLGA nanoparticles with high curcumin encapsulation for efficient mucus penetration. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:2280-2293. [PMID: 31807413 PMCID: PMC6880834 DOI: 10.3762/bjnano.10.220] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 10/24/2019] [Indexed: 05/10/2023]
Abstract
Great challenges still remain to develop drug carriers able to penetrate biological barriers (such as the dense mucus in cystic fibrosis) and for the treatment of bacteria residing in biofilms, embedded in mucus. Drug carrier systems such as nanoparticles (NPs) require proper surface chemistry and small size to ensure their permeability through the hydrogel-like systems. We have employed a microfluidic system to fabricate poly(lactic-co-glycolic acid) (PLGA) nanoparticles coated with a muco-penetrating stabilizer (Pluronic), with a tunable hydrodynamic diameter ranging from 40 nm to 160 nm. The size dependence was evaluated by varying different parameters during preparation, namely polymer concentration, stabilizer concentration, solvent nature, the width of the focus mixing channel, flow rate ratio and total flow rate. Furthermore, the influence of the length of the focus mixing channel on the size was evaluated in order to better understand the nucleation-growth mechanism. Surprisingly, the channel length was revealed to have no effect on particle size for the chosen settings. In addition, curcumin was loaded (EE% of ≈68%) very efficiently into the nanoparticles. Finally, the permeability of muco-penetrating PLGA NPs through pulmonary human mucus was assessed; small NPs with a diameter of less than 100 nm showed fast permeation, underlining the potential of microfluidics for such pharmaceutical applications.
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Affiliation(s)
- Nashrawan Lababidi
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, 66123 Saarbrücken, Germany
| | - Valentin Sigal
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, 66123 Saarbrücken, Germany
| | - Aljoscha Koenneke
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, 66123 Saarbrücken, Germany
| | - Konrad Schwarzkopf
- Department of Anaesthesia and Intensive Care, Klinikum Saarbrücken, Winterberg, 66119 Saarbrücken, Germany
| | | | - Marc Schneider
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, 66123 Saarbrücken, Germany
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Rasouli MR, Tabrizian M. An ultra-rapid acoustic micromixer for synthesis of organic nanoparticles. LAB ON A CHIP 2019; 19:3316-3325. [PMID: 31495858 DOI: 10.1039/c9lc00637k] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Mixing is a crucial step in many chemical analyses and synthesis processes, particularly in nanoparticle formation, where it determines the nucleation rate, homogeneity, and physicochemical characteristics of the products. In this study, we propose an energy-efficient acoustic platform based on boundary-driven acoustic streaming, which provides the rapid mixing required to control nanoprecipitation. The device encompasses oscillatory bubbles and sharp edges in the microchannel to transform the acoustic energy into vigorous vortical fluid motions. The combination of bubbles and sharp edges at their immediate proximity induced substantially stronger acoustic microstreams than the simple superposition of their effects. The device could effectively homogenize DI water and fluorescein within a mixing length of 25.2 μm up to a flow rate of 116 μL min-1 at a driving voltage of 40 Vpp, corresponding to a mixing time of 0.8 ms. This rapid mixing was employed to mitigate some complexities in nanoparticle synthesis, namely controlling nanoprecipitation and size, batch to batch variation, synthesis throughput, and clogging. Both polymeric nanoparticles and liposomes were synthesized in this platform and showed a smaller effective size and narrower size distribution in comparison to those obtained by a hydrodynamic flow focusing method. Through changing the mixing time, the effective size of the nanoparticles could be fine-tuned for both polymeric nanoparticles and liposomes. The rapid mixing and strong vortices prevent aggregation of nanoparticles, leading to a substantially higher throughput of liposomes in comparison with that by the hydrodynamic flow focusing method. The straightforward fabrication process of the system coupled with low power consumption, high-controllability, and rapid mixing time renders this mixer a practical platform for a myriad of nano and biotechnological applications.
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Affiliation(s)
- M Reza Rasouli
- Biomedical Engineering Department-Faculty of Medicine, McGill University, Montreal, Quebec H3A 2B4, Canada.
| | - Maryam Tabrizian
- Biomedical Engineering Department-Faculty of Medicine, McGill University, Montreal, Quebec H3A 2B4, Canada. and Faculty of Dentistry, McGill University, Montreal, Quebec H3A 2B4, Canada
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Mahmoodi Z, Mohammadnejad J, Razavi Bazaz S, Abouei Mehrizi A, Ghiass MA, Saidijam M, Dinarvand R, Ebrahimi Warkiani M, Soleimani M. A simple coating method of PDMS microchip with PTFE for synthesis of dexamethasone-encapsulated PLGA nanoparticles. Drug Deliv Transl Res 2019; 9:707-720. [DOI: 10.1007/s13346-019-00636-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Tao J, Chow SF, Zheng Y. Application of flash nanoprecipitation to fabricate poorly water-soluble drug nanoparticles. Acta Pharm Sin B 2019; 9:4-18. [PMID: 30766774 PMCID: PMC6361851 DOI: 10.1016/j.apsb.2018.11.001] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 11/02/2018] [Accepted: 11/04/2018] [Indexed: 01/08/2023] Open
Abstract
Nanoparticles are considered to be a powerful approach for the delivery of poorly water-soluble drugs. One of the main challenges is developing an appropriate method for preparation of drug nanoparticles. As a simple, rapid and scalable method, the flash nanoprecipitation (FNP) has been widely used to fabricate these drug nanoparticles, including pure drug nanocrystals, polymeric micelles, polymeric nanoparticles, solid lipid nanoparticles, and polyelectrolyte complexes. This review introduces the application of FNP to produce poorly water-soluble drug nanoparticles by controllable mixing devices, such as confined impinging jets mixer (CIJM), multi-inlet vortex mixer (MIVM) and many other microfluidic mixer systems. The formation mechanisms and processes of drug nanoparticles by FNP are described in detail. Then, the controlling of supersaturation level and mixing rate during the FNP process to tailor the ultrafine drug nanoparticles as well as the influence of drugs, solvent, anti-solvent, stabilizers and temperature on the fabrication are discussed. The ultrafine and uniform nanoparticles of poorly water-soluble drug nanoparticles prepared by CIJM, MIVM and microfluidic mixer systems are reviewed briefly. We believe that the application of microfluidic mixing devices in laboratory with continuous process control and good reproducibility will be benefit for industrial formulation scale-up.
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Key Words
- ACN, acetonitrile
- CA 320S Seb, cellulose acetate 320S sebacate
- CAP Adp 0.33, cellulose acetate propionate 504-0.2 adipate 0.33
- CAP Adp 0.85, cellulose acetate propionate adipate 0.85
- CFA, cefuroxime axetil
- CIJM, confined impinging jets mixer
- CMCAB, carboxymethyl cellulose acetate butyrate
- CTACl, cetyltrimethylammonium chloride
- DMF, dimethyl formamide
- DMSO, dimethyl sulfoxide
- DSPE-PEG, distearyl phosphatidyl ethanolamine-poly(ethylene glycol)
- Dex-PLLA, dextrose-poly(l-lactic acid)
- FNP, flash nanoprecipitation
- Flash nanoprecipitation
- HPC, hydroxypropyl cellulose
- HPMC, hydroxypropyl methyl cellulose
- HPMCAS, hydroxypropyl methylcellulose acetate succinate
- MIVM, multi-inlet vortex mixer
- Microfluidic mixer device
- NaAlg, sodium alginate
- NaCMC, carboxymethyl cellulose sodium
- Nanoparticles
- P(MePEGCA-co-HDCA), poly(methoxy polyethylene glycol cyanoacrylate-co-hexadecyl cyanoacrylate)
- PAA, poly(acrylic acid)
- PAH, polyallylamine hydrochloride
- PCL, poly(ε-caprolactone)
- PEG, polyethylene glycol
- PEG-PCL, poly(ethylene glycol)-poly(ε-caprolactone)
- PEG-PLA, poly(ethylene glycol)-poly(lactic acid)
- PEG-PLGA, poly(ethylene glycol)-poly(lactic-co-glycolic acid)
- PEG-PS, poly(ethylene glycol)-polystyrene
- PEI, polyethyleneimine
- PEO-PDLLA, poly(ethylene oxide)-poly(d,l-lactic acid)
- PLA, poly(lactic acid)
- PLGA, poly(lactic-co-glycolic acid)
- PMMA, polymethyl methacrylate
- PSS, polyprotomine sulfate
- PVA, polyvinyl alcohol
- PVP, polyvinyl pyrrolidone
- Poorly water-soluble drug
- SDS, sodium dodecyl sulfonate
- SLS, sodium lauryl sulfate
- THF, tetrahydrofuran
- TPGS, tocopheryl polyethylene glycol 1000 succinate
- ε-PL, ε-polylysine
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Affiliation(s)
- Jinsong Tao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Science, University of Macau, Macau, China
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Ying Zheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Science, University of Macau, Macau, China
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Rezvantalab S, Keshavarz Moraveji M. Microfluidic assisted synthesis of PLGA drug delivery systems. RSC Adv 2019; 9:2055-2072. [PMID: 35516107 PMCID: PMC9059828 DOI: 10.1039/c8ra08972h] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 12/16/2018] [Indexed: 12/28/2022] Open
Abstract
Poly(lactic-co-glycolic acid) (PLGA) is a biocompatible and biodegradable polymer that recently attracted attention for use as part of drug delivery systems (DDS). In this context, there is an emerging need for a rapid, reliable and reproducible method of synthesis. Here, microfluidic systems provide great opportunities for synthesizing carriers in a tightly controlled manner and with low consumption of materials, energy and time. These miniature devices have been the focus of recent research since they can address the challenges inherent to the bulk system, e.g. low drug loading efficiency and encapsulation, broad size distribution and burst initial release. In this article, we provide an overview of current microfluidic systems used in drug delivery production, with a special focus on PLGA-based DDS. In this context, we highlight the advantages associated with the use of microchip systems in the fabrication of nanoparticles (NPs) and microparticles (MPs), e.g. in achieving complex morphologies. Furthermore, we discuss the challenges for selecting proper microfluidics for targeted DDS production in a translational setting and introduce strategies that are used to overcome microfluidics shortcomings, like low throughput for production. Poly(lactic-co-glycolic acid) (PLGA) is a biocompatible and biodegradable polymer that recently attracted attention for use as part of drug delivery systems (DDS).![]()
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Affiliation(s)
- Sima Rezvantalab
- Department of Chemical Engineering
- Amirkabir University of Technology (Tehran Polytechnic)
- Tehran
- Iran
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Cerra B, Mosca G, Ricci M, Schoubben A, Gioiello A. Flow nanoprecipitation of size-controlled d-leucine nanoparticles for spray-drying formulations. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00242a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A flow-based flash nanoprecipitation of size-controlled d-leucine nanoparticles as glidants for pulmonary delivery of active pharmaceutical ingredients.
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Affiliation(s)
- Bruno Cerra
- Department of Pharmaceutical Sciences
- University of Perugia
- I-06122 Perugia
- Italy
| | - Gabriele Mosca
- Department of Pharmaceutical Sciences
- University of Perugia
- I-06122 Perugia
- Italy
| | - Maurizio Ricci
- Department of Pharmaceutical Sciences
- University of Perugia
- I-06122 Perugia
- Italy
| | - Aurélie Schoubben
- Department of Pharmaceutical Sciences
- University of Perugia
- I-06122 Perugia
- Italy
| | - Antimo Gioiello
- Department of Pharmaceutical Sciences
- University of Perugia
- I-06122 Perugia
- Italy
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Operti MC, Fecher D, van Dinther EAW, Grimm S, Jaber R, Figdor CG, Tagit O. A comparative assessment of continuous production techniques to generate sub-micron size PLGA particles. Int J Pharm 2018; 550:140-148. [PMID: 30144511 DOI: 10.1016/j.ijpharm.2018.08.044] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 10/28/2022]
Abstract
The clinical and commercial development of polymeric sub-micron size formulations based on poly(lactic-co-glycolic acid) (PLGA) particles is hampered by the challenges related to their good manufacturing practice (GMP)-compliant, scale-up production without affecting the formulation specifications. Continuous process technologies enable large-scale production without changing the process or formulation parameters by increasing the operation time. Here, we explore three well-established process technologies regarding continuity for the large-scale production of sub-micron size PLGA particles developed at the lab scale using a batch method. We demonstrate optimization of critical process and formulation parameters for high-shear mixing, high-pressure homogenization and microfluidics technologies to obtain PLGA particles with a mean diameter of 150-250 nm and a small polydispersity index (PDI, ≤0.2). The most influential parameters on the particle size distribution are discussed for each technique with a critical evaluation of their suitability for GMP production. Although each technique can provide particles in the desired size range, high-shear mixing is found to be particularly promising due to the availability of GMP-ready equipment and large throughput of production. Overall, our results will be of great guidance for establishing continuous process technologies for the GMP-compliant, large-scale production of sub-micron size PLGA particles, facilitating their commercial and clinical development.
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Affiliation(s)
- Maria Camilla Operti
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen and Oncode Institute, The Netherlands; Evonik Nutrition & Care GmbH, Health Care, 64293 Darmstadt, Germany
| | - David Fecher
- Evonik Nutrition & Care GmbH, Health Care, 64293 Darmstadt, Germany
| | - Eric A W van Dinther
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen and Oncode Institute, The Netherlands
| | - Silko Grimm
- Evonik Nutrition & Care GmbH, Health Care, 64293 Darmstadt, Germany
| | - Rima Jaber
- Evonik Nutrition & Care GmbH, Health Care, 64293 Darmstadt, Germany
| | - Carl G Figdor
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen and Oncode Institute, The Netherlands.
| | - Oya Tagit
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen and Oncode Institute, The Netherlands.
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58
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Zhang H, Zhu Y, Shen Y. Microfluidics for Cancer Nanomedicine: From Fabrication to Evaluation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800360. [PMID: 29806174 DOI: 10.1002/smll.201800360] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/12/2018] [Indexed: 05/22/2023]
Abstract
Self-assembled drug delivery systems (sDDSs), made from nanocarriers and drugs, are one of the major types of nanomedicines, many of which are in clinical use, under preclinical investigation, or in clinical trials. One of the hurdles of this type of nanomedicine in real applications is the inherent complexity of their fabrication processes, which generally lack precise control over the sDDS structures and the batch-to-batch reproducibility. Furthermore, the classic 2D in vitro cell model, monolayer cell culture, has been used to evaluate sDDSs. However, 2D cell culture cannot adequately replicate in vivo tissue-level structures and their highly complex dynamic 3D environments, nor can it simulate their functions. Thus, evaluations using 2D cell culture often cannot correctly correlate with sDDS behaviors and effects in humans. Microfluidic technology offers novel solutions to overcome these problems and facilitates studying the structure-performance relationships for sDDS developments. In this Review, recent advances in microfluidics for 1) fabrication of sDDSs with well-defined physicochemical properties, such as size, shape, rigidity, and drug-loading efficiency, and 2) fabrication of 3D-cell cultures as "tissue/organ-on-a-chip" platforms for evaluations of sDDS biological performance are in focus.
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Affiliation(s)
- Hao Zhang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yifeng Zhu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Youqing Shen
- Center for Bionanoengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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Augustine R, Ashkenazi DL, Arzi RS, Zlobin V, Shofti R, Sosnik A. Nanoparticle-in-microparticle oral drug delivery system of a clinically relevant darunavir/ritonavir antiretroviral combination. Acta Biomater 2018; 74:344-359. [PMID: 29723705 DOI: 10.1016/j.actbio.2018.04.045] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/22/2018] [Accepted: 04/23/2018] [Indexed: 10/17/2022]
Abstract
Nanonizationhas been extensively investigated to increase theoral bioavailability of hydrophobicdrugsin general andantiretrovirals(ARVs)used inthe therapy of the human immunodeficiency virus (HIV) infection in particular. Weanticipatedthatin the caseofprotease inhibitors, a family of pH-dependent ARVsthatdisplay high aqueous solubility undertheacidconditionsof thestomach andextremely low solubilityunder the neutral ones ofthe small intestine, this strategy might failowing to an uncontrolled dissolution-re-precipitation process that will take place along the gastrointestinal tract.To tackle thisbiopharmaceutical challenge, in this work, wedesigned, produced and fully characterized a novelNanoparticle-in-MicroparticleDelivery System(NiMDS)comprised of pure nanoparticlesofthefirst-line protease inhibitor darunavir(DRV) and itsboosting agentritonavir (RIT) encapsulated within film-coated microparticles.For this, a clinically relevant combination of pure DRV and RIT nanoparticles wassynthesized by a sequential nanoprecipitation/solvent diffusion and evaporation method employing sodium alginateas viscosity stabilizer. Then, pure nanoparticles were encapsulated within calcium alginate/chitosanmicroparticlesthat were film-coated with a series ofpoly(methacrylate) copolymers with differential solubility in the gastrointestinal tract. This coating ensured full stability under gastric-like pH and sustained drug release under intestinal one. PharmacokineticstudiesconductedinalbinoSpragueDawleyratsshowed that DRV/RIT-loadedNiMDSs containing 17% w/w drug loading based on dry weight significantlyincreasedthe oral bioavailabilityof DRVby 2.3-foldwith respect to both theunprocessedandthenanonized DRV/RIT combinations that showed statistically similar performance. Moreover, they highlighted the limited advantage of only drugnanonizationto improve the oral pharmacokinetics of protease inhibitors and the potential of our novel delivery approach to improve the oral pharmacokinetics of nanonized poorly water-soluble drugs displaying pH-dependent solubility. STATEMENT OF SIGNIFICANCE Protease inhibitors (PIs) are gold-standard drugs in many ARV cocktails. Darunavir (DRV) is the latest approved PI and it is included in the 20th WHO Model List of Essential Medicines. PIs poorly-water soluble at intestinal pH and more soluble under gastric conditions. Drug nanonization represents one of the most common nanotechnology strategies to increase dissolution rate of hydrophobic drugs and thus, their oral bioavailability. For instance, pure drug nanosuspensions became the most clinically relevant nanoformulation. However, according to the physicochemical properties of PIs, nanonization does not appear as a very beneficial strategy due to the fast dissolution rate anticipated under the acid conditions of the stomach and their uncontrolled recrystallization and precipitation in the small intestine that might result in the formation of particles of unpredictable size and structure (e.g., crystallinity and polymorphism) and consequently, unknown dissolution rate and bioavailability. In this work, we developed a sequential nanoprecipitation method for the production of pure nanoparticles of DRV and its boosting agent ritonavir in a clinically relevant 8:1 wt ratio using alginate as viscosity stabilizer and used this nanosuspension to produce a novel kind of nanoparticle-in-microparticle delivery system that was fully characterized and the pharmacokinetics assessed in rats. The most significant points of the current manuscript are.
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Swider E, Koshkina O, Tel J, Cruz LJ, de Vries IJM, Srinivas M. Customizing poly(lactic-co-glycolic acid) particles for biomedical applications. Acta Biomater 2018; 73:38-51. [PMID: 29653217 DOI: 10.1016/j.actbio.2018.04.006] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/28/2018] [Accepted: 04/03/2018] [Indexed: 12/22/2022]
Abstract
Nano- and microparticles have increasingly widespread applications in nanomedicine, ranging from drug delivery to imaging. Poly(lactic-co-glycolic acid) (PLGA) particles are the most widely-applied type of particles due to their biocompatibility and biodegradability. Here, we discuss the preparation of PLGA particles, and various modifications to tailor particles for applications in biological systems. We highlight new preparation approaches, including microfluidics and PRINT method, and modifications of PLGA particles resulting in novel or responsive properties, such as Janus or upconversion particles. Finally, we describe how the preparation methods can- and should-be adapted to tailor the properties of particles for the desired biomedical application. Our aim is to enable researchers who work with PLGA particles to better appreciate the effects of the selected preparation procedure on the final properties of the particles and its biological implications. STATEMENT OF SIGNIFICANCE Nanoparticles are increasingly important in the field of biomedicine. Particles made of polymers are in the spotlight, due to their biodegradability, biocompatibility, versatility. In this review, we aim to discuss the range of formulation techniques, manipulations, and applications of poly(lactic-co-glycolic acid) (PLGA) particles, to enable a researcher to effectively select or design the optimal particles for their application. We describe the various techniques of PLGA particle synthesis and their impact on possible applications. We focus on recent developments in the field of PLGA particles, and new synthesis techniques that have emerged over the past years. Overall, we show how the chemistry of PLGA particles can be adapted to solve pressing biological needs.
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Li X, Jiang X. Microfluidics for producing poly (lactic-co-glycolic acid)-based pharmaceutical nanoparticles. Adv Drug Deliv Rev 2018; 128:101-114. [PMID: 29277543 DOI: 10.1016/j.addr.2017.12.015] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/17/2017] [Accepted: 12/20/2017] [Indexed: 12/13/2022]
Abstract
Microfluidic chips allow the rapid production of a library of nanoparticles (NPs) with distinct properties by changing the precursors and the flow rates, significantly decreasing the time for screening optimal formulation as carriers for drug delivery compared to conventional methods. The batch-to-batch reproducibility which is essential for clinical translation is achieved by precisely controlling the precursors and the flow rate, regardless of operators. Poly (lactic-co-glycolic acid) (PLGA) is the most widely used Food and Drug Administration (FDA)-approved biodegradable polymers. Researchers often combine PLGA with lipids or amphiphilic molecules to assemble into a core/shell structure to exploit the potential of PLGA-based NPs as powerful carriers for cancer-related drug delivery. In this review, we discuss the advantages associated with microfluidic chips for producing PLGA-based functional nanocomplexes for drug delivery. These laboratory-based methods can readily scale up to provide sufficient amount of PLGA-based NPs in microfluidic chips for clinical studies and industrial-scale production.
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Sanjay ST, Zhou W, Dou M, Tavakoli H, Ma L, Xu F, Li X. Recent advances of controlled drug delivery using microfluidic platforms. Adv Drug Deliv Rev 2018; 128:3-28. [PMID: 28919029 PMCID: PMC5854505 DOI: 10.1016/j.addr.2017.09.013] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/11/2017] [Accepted: 09/13/2017] [Indexed: 12/13/2022]
Abstract
Conventional systematically-administered drugs distribute evenly throughout the body, get degraded and excreted rapidly while crossing many biological barriers, leaving minimum amounts of the drugs at pathological sites. Controlled drug delivery aims to deliver drugs to the target sites at desired rates and time, thus enhancing the drug efficacy, pharmacokinetics, and bioavailability while maintaining minimal side effects. Due to a number of unique advantages of the recent microfluidic lab-on-a-chip technology, microfluidic lab-on-a-chip has provided unprecedented opportunities for controlled drug delivery. Drugs can be efficiently delivered to the target sites at desired rates in a well-controlled manner by microfluidic platforms via integration, implantation, localization, automation, and precise control of various microdevice parameters. These features accordingly make reproducible, on-demand, and tunable drug delivery become feasible. On-demand self-tuning dynamic drug delivery systems have shown great potential for personalized drug delivery. This review presents an overview of recent advances in controlled drug delivery using microfluidic platforms. The review first briefly introduces microfabrication techniques of microfluidic platforms, followed by detailed descriptions of numerous microfluidic drug delivery systems that have significantly advanced the field of controlled drug delivery. Those microfluidic systems can be separated into four major categories, namely drug carrier-free micro-reservoir-based drug delivery systems, highly integrated carrier-free microfluidic lab-on-a-chip systems, drug carrier-integrated microfluidic systems, and microneedles. Microneedles can be further categorized into five different types, i.e. solid, porous, hollow, coated, and biodegradable microneedles, for controlled transdermal drug delivery. At the end, we discuss current limitations and future prospects of microfluidic platforms for controlled drug delivery.
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Affiliation(s)
- Sharma T. Sanjay
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Wan Zhou
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Maowei Dou
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
| | - Hamed Tavakoli
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Lei Ma
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Feng Xu
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - XiuJun Li
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Border Biomedical Research Center, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Biomedical Engineering, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Environmental Science and Engineering, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
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Current developments and applications of microfluidic technology toward clinical translation of nanomedicines. Adv Drug Deliv Rev 2018; 128:54-83. [PMID: 28801093 DOI: 10.1016/j.addr.2017.08.003] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 07/21/2017] [Accepted: 08/04/2017] [Indexed: 11/23/2022]
Abstract
Nanoparticulate drug delivery systems hold great potential for the therapy of many diseases, especially cancer. However, the translation of nanoparticulate drug delivery systems from academic research to industrial and clinical practice has been slow. This slow translation can be ascribed to the high batch-to-batch variations and insufficient production rate of the conventional preparation methods, and the lack of technologies for rapid screening of nanoparticulate drug delivery systems with high correlation to the in vivo tests. These issues can be addressed by the microfluidic technologies. For example, microfluidics can not only produce nanoparticles in a well-controlled, reproducible, and high-throughput manner, but also create 3D environments with continuous flow to mimic the physiological and/or pathological processes. This review provides an overview of the microfluidic devices developed to prepare nanoparticulate drug delivery systems, including drug nanosuspensions, polymer nanoparticles, polyplexes, structured nanoparticles and theranostic nanoparticles. We also highlight the recent advances of microfluidic systems in fabricating the increasingly realistic models of the in vivo milieu for rapid screening of nanoparticles. Overall, the microfluidic technologies offer a promise approach to accelerate the clinical translation of nanoparticulate drug delivery systems.
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Martins JP, Torrieri G, Santos HA. The importance of microfluidics for the preparation of nanoparticles as advanced drug delivery systems. Expert Opin Drug Deliv 2018; 15:469-479. [PMID: 29508630 DOI: 10.1080/17425247.2018.1446936] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
INTRODUCTION Nanoparticles are anticipated to overcome persistent challenges in efficient drug delivery, but the limitations associated with conventional methods of preparation are resulting in slow translation from research to clinical applications. Due to their enormous potential, microfluidic technologies have emerged as an advanced approach for the development of drug delivery systems with well-defined physicochemical characteristics and in a reproducible manner. AREAS COVERED This review provides an overview of microfluidic devices and materials used for their manufacturing, together with the flow patterns and regimes commonly used for nanoparticle preparation. Additionally, the different geometries used in droplet microfluidics are reviewed, with particular attention to the co-flow geometry used for the production of nanoparticles. Finally, this review summarizes the main and most recent nanoparticulate systems prepared using microfluidics, including drug nanosuspensions, polymeric, lipid, structured, and theranostic nanoparticles. EXPERT OPINION The production of nanoparticles at industrial scale is still a challenge, but the microfluidic technologies bring exciting opportunities to develop drug delivery systems that can be engineered in an easy, cost-effective and reproducible manner. As a highly interdisciplinary research field, more efforts and general acceptance are needed to allow for the translation of nanoparticulate drug delivery systems from academic research to the clinical practice.
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Affiliation(s)
- João Pedro Martins
- a Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy , University of Helsinki , Helsinki , Finland
| | - Giulia Torrieri
- a Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy , University of Helsinki , Helsinki , Finland
| | - Hélder A Santos
- a Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy , University of Helsinki , Helsinki , Finland.,b Helsinki Institute of Life Science (HiLIFE) , University of Helsinki , Helsinki , Finland
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Lorenz T, Bojko S, Bunjes H, Dietzel A. An inert 3D emulsification device for individual precipitation and concentration of amorphous drug nanoparticles. LAB ON A CHIP 2018; 18:627-638. [PMID: 29345261 DOI: 10.1039/c7lc01313b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanosizing increases the specific surface of drug particles, leading to faster dissolution inside the organism and improving the bioavailability of poorly water-soluble drugs. A novel approach for the preparation of drug nanoparticles in water using chemically inert microfluidic emulsification devices is presented in this paper. A lithographic fabrication sequence was established, allowing fabrication of intersecting and coaxial channels of different depths in glass as is required for 3D flow-focusing. Fenofibrate was used as a model for active pharmaceutical ingredients with very low water solubility in the experiments. It was dissolved in ethyl acetate and emulsified in water, as allowed by the 3D flow-focusing geometry. In the thread formation regime, the drug solution turned into monodisperse droplets of sizes down to below 1 μm. Fast supersaturation occurs individually in each droplet, as the disperse phase solvent progressively diffuses into the surrounding water. Liquid antisolvent precipitation results in highly monodisperse and amorphous nanoparticles of sizes down to 128 nm which can be precisely controlled by the continuous and disperse phase pressure. By comparing optically measured droplet sizes with particle sizes by dynamic light scattering, we could confirm that exactly one particle forms in every droplet. Furthermore, a downstream on-chip concentration allowed withdrawal of major volumes of only the continuous phase fluid which enabled an increase of particle concentration by up to 250 times.
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Affiliation(s)
- T Lorenz
- Technische Universität Braunschweig, Institut für Mikrotechnik, Alte Salzdahlumer Str. 203, 38124 Braunschweig, Germany.
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Ding S, Attia MF, Wallyn J, Taddei C, Serra CA, Anton N, Kassem M, Schmutz M, Er-Rafik M, Messaddeq N, Collard A, Yu W, Giordano M, Vandamme TF. Microfluidic-Assisted Production of Size-Controlled Superparamagnetic Iron Oxide Nanoparticles-Loaded Poly(methyl methacrylate) Nanohybrids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1981-1991. [PMID: 29334739 DOI: 10.1021/acs.langmuir.7b01928] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this paper, superparamagnetic iron oxide nanoparticles (SPIONs, around 6 nm) encapsulated in poly(methyl methacrylate) nanoparticles (PMMA NPs) with controlled sizes ranging from 100 to 200 nm have been successfully produced. The hybrid polymeric NPs were prepared following two different methods: (1) nanoprecipitation and (2) nanoemulsification-evaporation. These two methods were implemented in two different microprocesses based on the use of an impact jet micromixer and an elongational-flow microemulsifier. SPIONs-loaded PMMA NPs synthesized by the two methods presented completely different physicochemical properties. The polymeric NPs prepared with the micromixer-assisted nanoprecipitation method showed a heterogeneous dispersion of SPIONs inside the polymer matrix, an encapsulation efficiency close to 100 wt %, and an irregular shape. In contrast, the polymeric NPs prepared with the microfluidic-assisted nanoemulsification-evaporation method showed a homogeneous dispersion, an almost complete encapsulation, and a spherical shape. The properties of the polymeric NPs have been characterized by dynamic light scattering, thermogravimetric analysis, and transmission electron microscope. In vitro cytotoxicity assays were also performed on the nanohybrids and pure PMMA NPs.
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Affiliation(s)
- Shukai Ding
- Université de Strasbourg, CNRS, ICS UPR 22 , F-67000 Strasbourg, France
- Institute of Atomic and Molecular Science, Shaanxi University of Science & Technology , CN-710021 Xi'an, Shaanxi, China
| | - Mohamed F Attia
- Université de Strasbourg, CNRS, CAMB UMR 7199 , F-67000 Strasbourg, France
- National Research Centre , 12622 Cairo, Egypt
- Department of Bioengineering, Clemson University , Clemson, South Carolina 29634, United States
| | - Justine Wallyn
- Université de Strasbourg, CNRS, CAMB UMR 7199 , F-67000 Strasbourg, France
| | - Chiara Taddei
- Université de Strasbourg, CNRS, ICS UPR 22 , F-67000 Strasbourg, France
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR , Portici 80055, Italy
| | | | - Nicolas Anton
- Université de Strasbourg, CNRS, CAMB UMR 7199 , F-67000 Strasbourg, France
| | - Mohamad Kassem
- Vascular and Tissue Stress in Transplantation: Microparticles and Environment EA7293, Université de Strasbourg , F-67000 Strasbourg, France
| | - Marc Schmutz
- Université de Strasbourg, CNRS, ICS UPR 22 , F-67000 Strasbourg, France
| | - Meriem Er-Rafik
- Université de Strasbourg, CNRS, ICS UPR 22 , F-67000 Strasbourg, France
| | - Nadia Messaddeq
- Université de Strasbourg CNRS, INSERM, Collège de France, IGBMC UMR 7104/UMR_S 964 , F-67000 Strasbourg, France
| | - Alexandre Collard
- Université de Strasbourg, CNRS, ICS UPR 22 , F-67000 Strasbourg, France
| | - Wei Yu
- Université de Strasbourg, CNRS, ICS UPR 22 , F-67000 Strasbourg, France
| | - Michele Giordano
- Institute for Polymers, Composites and Biomaterials (IPCB), CNR , Portici 80055, Italy
| | - Thierry F Vandamme
- Université de Strasbourg, CNRS, CAMB UMR 7199 , F-67000 Strasbourg, France
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Zhao L, Shen G, Ma G, Yan X. Engineering and delivery of nanocolloids of hydrophobic drugs. Adv Colloid Interface Sci 2017; 249:308-320. [PMID: 28456289 DOI: 10.1016/j.cis.2017.04.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/16/2017] [Accepted: 04/18/2017] [Indexed: 12/20/2022]
Abstract
A lot of efforts have been devoted to engineering the delivery of hydrophobic drugs due to the high demand of chemotherapy against cancer. While early developed liposomes and polymeric nanoparticles did not meet the requirements of high drug loading efficiency, pure drug nanoparticles appeared to meet these together with high stability. Current drug delivery systems demand an improved performance over the whole aspects of stability, loading capacity, and therapeutic effects. As a result, both new techniques based on traditional methods and totally new procedures are under investigation. In this review, we focus on the evaluation of pure drug nanolloids fabricated by different engineering protocols with emphasis on the size and morphology, delivery and controlled release, and therapeutic effects of these drug nanocolloids.
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Russo M, Grimaldi AM, Bevilacqua P, Tammaro O, Netti PA, Torino E. PEGylated crosslinked hyaluronic acid nanoparticles designed through a microfluidic platform for nanomedicine. Nanomedicine (Lond) 2017; 12:2211-2222. [DOI: 10.2217/nnm-2017-0103] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Aim: A high versatile microfluidic platform is proposed to design, in a one-step strategy, PEGylated crosslinked hyaluronic acid nanoparticles (cHANPs) entrapping a magnetic resonance imaging contrast agent and a dye for multimodal imaging applications. Materials & methods: Clinically relevant biomaterials were shaped in the form of spherical NPs through a microfluidic flow focusing approach. A comparison between post processing and simultaneous PEGylation is reported to evaluate the potentiality of the chemical decoration of the cHANPs in microfluidics. Results: An accurate control of the NPs in terms of size, PEGylation and loading was obtained. Furthermore, in vitro cell viability is reported and their ability to boost the magnetic resonance imaging signal is also confirmed. Conclusion: The proposed microfluidic approach reveals its ability to overcome several limitations of the traditional processes and to become an easy-to-use platform for theranostic applications.
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Affiliation(s)
- Maria Russo
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 80125 Naples, Italy
- Department of Chemical Engineering, Materials & Industrial Production, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy
| | - Anna Maria Grimaldi
- IRCCS Fondazione SDN, Istituto di Ricerca Diagnostica e Nucleare, 80143 Naples, Italy
| | - Paolo Bevilacqua
- IRCCS Fondazione SDN, Istituto di Ricerca Diagnostica e Nucleare, 80143 Naples, Italy
| | - Olimpia Tammaro
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 80125 Naples, Italy
- Department of Chemical Engineering, Materials & Industrial Production, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy
| | - Paolo Antonio Netti
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 80125 Naples, Italy
- Department of Chemical Engineering, Materials & Industrial Production, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy
| | - Enza Torino
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 80125 Naples, Italy
- Department of Chemical Engineering, Materials & Industrial Production, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy
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Garjani A, Barzegar-Jalali M, Osouli-Bostanabad K, Ranjbar H, Adibkia K. Morphological and physicochemical evaluation of the propranolol HCl–Eudragit® RS100 electrosprayed nanoformulations. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:749-756. [DOI: 10.1080/21691401.2017.1337027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alireza Garjani
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Barzegar-Jalali
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Karim Osouli-Bostanabad
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Ranjbar
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Students Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Khosro Adibkia
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Liu D, Zhang H, Fontana F, Hirvonen JT, Santos HA. Microfluidic-assisted fabrication of carriers for controlled drug delivery. LAB ON A CHIP 2017; 17:1856-1883. [PMID: 28480462 DOI: 10.1039/c7lc00242d] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The microfluidic technique has brought unique opportunities toward the full control over the production processes for drug delivery carriers, owing to the miniaturisation of the fluidic environment. In comparison to the conventional batch methods, the microfluidic setup provides a range of advantages, including the improved controllability of material characteristics, as well as the precisely controlled release profiles of payloads. This review gives an overview of different fluidic principles used in the literature to produce either polymeric microparticles or nanoparticles, focusing on the materials that could have an impact on drug delivery. We also discuss the relations between the particle size and size distribution of the obtained carriers, and the design and configuration of the microfluidic setups. Overall, the use of microfluidic technologies brings exciting opportunities to expand the body of knowledge in the field of controlled drug delivery and great potential to clinical translation of drug delivery systems.
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Affiliation(s)
- Dongfei Liu
- Division of Pharmaceutical Chemistry and Technology, Drug Research Program, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland.
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Fahmy UA, Aljaeid BM. Combined strategy for suppressing breast carcinoma MCF-7 cell lines by loading simvastatin on alpha lipoic acid nanoparticles. Expert Opin Drug Deliv 2016; 13:1653-1660. [PMID: 27636370 DOI: 10.1080/17425247.2016.1236788] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Augmentation of simvastatin (SMV) cytotoxicity in breast carcinoma cell lines MCF-7, by: improvement of cellular uptake and loading on alpha lipoic acid (ALA). METHODS In this study, SMV was loaded on ALA nanoparticles and characterized for surface morphology, SMV entrapment efficiency percent (%EE), zeta potential and release profile. Cellular viability, morphology and uptake and DNA fragmentations were analyzed as a hallmark of cellular apoptosis. RESULTS TEM images demonstrated spherical nanoparticles with particle size 104.7 ± 5.5 nm, SMV %EE was 95.8 ± 2.1% with a zeta potential - 23.6 ± 5.4 mV, and release properties were significantly enhanced. IC50 was decreased to 22.2 ± 2.4 µM while raw SMV was 49.3 ± 6.6 µM. Cellular uptake of SMV-ALA nanoparticles was increased by about 3- and 2-folds after 2 and 4 h, respectively. DNA fragments confirmed the apoptosis property of ALA, which is associated with SMV cytotoxicity. CONCLUSION This study suggests evidence that SMV loaded on ALA nanoparticles increases the MCF-7 cellular uptake and cytotoxic effects induced by SMV as revealed by significantly enhanced cell death rates in MCF-7 cells. These findings demonstrate that ALA induces cell death, which makes the combination a candidate for tumor therapy.
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Affiliation(s)
- Usama A Fahmy
- a Department of Pharmaceutics & Industrial Pharmacy, Faculty of Pharmacy , King Abdulaziz University , Jeddah , Saudi Arabia
| | - Bader M Aljaeid
- a Department of Pharmaceutics & Industrial Pharmacy, Faculty of Pharmacy , King Abdulaziz University , Jeddah , Saudi Arabia
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