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Zhang ML, Zhang GP, Ma HS, Pan YZ, Liao XL. Preparation of pH-responsive polyurethane nano micelles and their antibacterial application. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:519-534. [PMID: 38265701 DOI: 10.1080/09205063.2024.2301807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 12/29/2023] [Indexed: 01/25/2024]
Abstract
Considering the differences in pH between bacterial infection microenvironment and normal tissues, a series of pH-responsive drug-release amphiphilic polyurethane copolymers (DPU-g-PEG) have been prepared in this work. Fourier transform infrared (FT-IR) spectroscopy and 1H NMR was selected to detect the structure of the condensed polymers. The DPU-g-PEG amphiphilic copolymers could form stable micelles with a hydrophilic shell of polyethylene glycol (PEG) and a hydrophobic core of polylactic acid (PLA). We loaded a model drug called triclosan onto DPU-g-PEG micelles and studied how pH affects their particle size, Zeta potential, and drug release performance. The results revealed that when exposed to acidic conditions, the surface potential of DPU-g-PEG micelles changed, the micelles' particle size increased, and the drug release performance was significantly enhanced. These results suggested that the micelles prepared in this study can release more antibacterial substances at sites of bacterial infection. Meanwhile, we also investigated the impact of different ratios of soft and hard segments on the properties of micelles, and the results showed that the pH responsiveness of micelles was strongest when the ratio of soft segments (PLLA diol + PEG 2000): 1,6-hexamethylene diisocyanate (HDI): 2,6-Bis-(2-hydroxy-ethyl)-pyrrolo[3,4-f]isoindole-1,3,5,7-tetraone (DMA) = 1: 1.2: 0.2. Furthermore, the results of inhibition zone test, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC) all confirmed the antibacterial activity of triclosan-load DPU-g-PEG micelles. In conclusion, the DPU-g-PEG micelles produced in this study have the potential to be used as intelligent drug delivery systems in the biomedical field.
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Affiliation(s)
- Mao-Lan Zhang
- Institute of Biomedical Engineering, Chongqing University of Science and Technology, Chongqing, China
| | - Gui-Ping Zhang
- Institute of Biomedical Engineering, Chongqing University of Science and Technology, Chongqing, China
| | - Hong-Shuo Ma
- Institute of Biomedical Engineering, Chongqing University of Science and Technology, Chongqing, China
| | - Yu-Zhu Pan
- School of Chemical Engineering, Sichuan University of Science and Engineering, Zigong, China
| | - Xiao-Ling Liao
- Institute of Biomedical Engineering, Chongqing University of Science and Technology, Chongqing, China
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2
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Brzeziński M, Socka M, Makowski T, Kost B, Cieślak M, Królewska-Golińska K. Microfluidic-assisted nanoprecipitation of biodegradable nanoparticles composed of PTMC/PCL (co)polymers, tannic acid and doxorubicin for cancer treatment. Colloids Surf B Biointerfaces 2021; 201:111598. [PMID: 33618081 DOI: 10.1016/j.colsurfb.2021.111598] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/13/2021] [Accepted: 01/26/2021] [Indexed: 12/12/2022]
Abstract
This study was aimed towards the development of a novel microfluidic approach for the preparation of (co)polymeric and hybrid nanoparticles (NPs) composed of (co)polymers/tannic acid (TA) in the microfluidic flow-focusing glass-capillary device. The MiliQ water was used as water phase, whereas the organic phase was composed of poly(ε-caprolactone) (PCL) and poly(trimethylene carbonate) (PTMC) homopolymers and (co)polymers with different proportion of comonomers which were prepared via enzymatic polymerization that allows avoiding the usage of potentially toxic catalyst. To prepare hybrid NPs, TA was additionally added to the organic phase. Subsequently, as a result of mixing between these distinct phases in microfluidic channels, the nanoprecipitation in the form of spherical NPs occurs. The size of NPs was tuned over the range of 140-230 nm by controlling phase flow rates and the composition of NPs. Moreover, the release studies of the encapsulated anticancer drug doxorubicin (DOX) demonstrated that the drug release is greatly influenced by the (co)polymers composition, their molecular weight, NPs size, and the presence of TA. The antitumor activities of the (co)polymeric and hybrid NPs toward breast cancer cells (MCF-7) were tested in vitro. Among all tested formulation, the NPs composed of PCL/TA most efficiently inhibit the cell proliferation of MCF-7 cells, most importantly, their efficiency was higher than free DOX. The proposed strategy may provide an efficient alternative for the construction of nanocarriers with great potential in anticancer therapy.
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Affiliation(s)
- Marek Brzeziński
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland.
| | - Marta Socka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Tomasz Makowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Bartłomiej Kost
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Marcin Cieślak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Karolina Królewska-Golińska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
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3
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Schuldes I, Noll DM, Schindler T, Zech T, Götz K, Appavou MS, Boesecke P, Steiniger F, Schulz PS, Unruh T. Internal Structure of Nanometer-Sized Droplets Prepared by Antisolvent Precipitation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13578-13587. [PMID: 31547660 DOI: 10.1021/acs.langmuir.9b00944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Antisolvent precipitation (AP) is a low-cost and less-invasive preparation alternative for organic nanoparticles compared to top-down methods such as high-pressure homogenization or milling. Here we report on particularly small organic nanoparticles (NPs) prepared by AP. It has been found for various materials that these NPs in their liquid state exhibit a significant degree of molecular order at their interface toward the dispersion medium including ubiquinones (coenzyme Q10), triglycerides (trimyristin, tripalmitin), and alkanes (tetracosane). This finding is independent of the use of a stabilizer in the formulation. While this is obviously a quite general interfacial structuring effect, the respective structural details of specific NPs systems might differ. Here, a detailed structural characterization of very small liquid coenzyme Q10 (Q10) NPs is presented as a particular example for this phenomenon. The Q10 NPs have been prepared by AP in the presence of two different stabilizers, sodium dodecyl sulfate (SDS) and pentaethylene glycol monododecyl ether (C12E5), respectively, and without any stabilizer. The NPs' size is initially analyzed by photon correlation spectroscopy (PCS). The SDS-stabilized Q10 NPs have been studied further by differential scanning calorimetry (DSC), small-angle X-ray and neutron scattering (SAXS, SANS), wide-angle X-ray scattering (WAXS), and cryogenic transmission electron microscopy (CryoTEM). A simultaneous analysis of SAXS and contrast variation SANS studies revealed the molecular arrangement within the interface between the NPs and the dispersion medium. The Q10 NPs stabilized by SDS and C12E5, respectively, are small (down to 19.9 nm) and stable (for at least 16 months) even when no stabilizer is used. The SDS-stabilized Q10 NPs reported here, are therewith, to the best of our knowledge, the smallest organic NPs which have been reported to be prepared by AP so far. In particular, these NPs exhibit a core-shell structure consisting of an amorphous Q10 core and a surrounding shell, which is mainly composed of oriented Q10 molecules and aligned SDS molecules. This structure suggests a significant amphiphilic behavior and a rather unexpected stabilizing role of Q10 molecules.
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Affiliation(s)
- Isabel Schuldes
- Institute for Crystallography and Structural Physics , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 3 , 91058 Erlangen , Germany
| | - Dennis M Noll
- Institute for Crystallography and Structural Physics , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 3 , 91058 Erlangen , Germany
| | - Torben Schindler
- Institute for Crystallography and Structural Physics , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 3 , 91058 Erlangen , Germany
| | - Tobias Zech
- Institute for Crystallography and Structural Physics , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 3 , 91058 Erlangen , Germany
- Center for Nanoanalysis and Electron Microscopy (CENEM) and Interdisciplinary Center for Nanostructured Films (IZNF) , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstr. 3 , 91058 Erlangen , Germany
| | - Klaus Götz
- Institute for Crystallography and Structural Physics , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 3 , 91058 Erlangen , Germany
- Center for Nanoanalysis and Electron Microscopy (CENEM) and Interdisciplinary Center for Nanostructured Films (IZNF) , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstr. 3 , 91058 Erlangen , Germany
| | - Marie-Sousai Appavou
- Forschungszentrum Jülich GmbH , Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ) , Lichtenbergstr. 1 , 85748 Garching , Germany
| | - Peter Boesecke
- European Synchrotron Radiation Facility (ESRF) , 71 Avenue de Martyrs , CS40220, 38042 Grenoble CEDEX 9, France
| | - Frank Steiniger
- Center for Electron Microscopy of the Jena University Hospital , Ziegelmühlenweg 1 , 07743 Jena , Germany
| | - Peter S Schulz
- Chair for Chemical Engineering I (Reaction Engineering) , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Egerlandstr. 3 , 91058 Erlangen , Germany
| | - Tobias Unruh
- Institute for Crystallography and Structural Physics , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 3 , 91058 Erlangen , Germany
- Center for Nanoanalysis and Electron Microscopy (CENEM) and Interdisciplinary Center for Nanostructured Films (IZNF) , Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstr. 3 , 91058 Erlangen , Germany
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Poozesh S, Mahdi Jafari S. Are traditional small-scale screening methods reliable to predict pharmaceutical spray drying? Pharm Dev Technol 2019; 24:915-925. [PMID: 31057007 DOI: 10.1080/10837450.2019.1616208] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Driven by the new trend to build quality into products and reducing empiricism, small-scale screening techniques have been frequently used to evaluate, thermodynamic of drug solubility in the polymer, and drug-polymer kinetic amorphous miscibility. In this paper, these methods have been overviewed to shed light on their liabilities in predicting spray-dried amorphous solid dispersions' (ASDs) properties. By scrutinizing relevant open literature, several inconsistencies have been recognized, deemed to be due to the inability of conventional miniaturized means to simulate the spray drying process operations/constraints in formulating active pharmaceutical ingredients (APIs). Given the complex interplay of thermodynamics of mixing, heat and mass transfer, and fluid dynamics in this process, scaling rules have been introduced to remedy arisen issues in conventional miniaturized tools. Accordingly, spray drying process is analyzed considering the fundamental physical transformations involved, i.e. atomization and drying. Each transformation is explored from a scaling perspective with an emphasis on key response factors, and ways to retain them for each transformation across scales. Prospective bifurcated developments may improve the odds of successful formulations/process conditions later on during development stages.
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Affiliation(s)
- Sadegh Poozesh
- a Mechanical Engineering Department , Tuskegee University , Tuskegee , AL , US
| | - Seid Mahdi Jafari
- b Food Materials and Process Design Engineering Department , Gorgan University of Agricultural Sciences and Natural Resources , Gorgan , Iran
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5
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Nemati Y, Zahedi P, Baghdadi M, Ramezani S. Microfluidics combined with ionic gelation method for production of nanoparticles based on thiol-functionalized chitosan to adsorb Hg (II) from aqueous solutions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 238:166-177. [PMID: 30851555 DOI: 10.1016/j.jenvman.2019.02.124] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/21/2019] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
This work aimed at producing nanoparticles (NPs) based on thiol-functionalized chitosan (CS) using capillary microfluidic (MF) device combined with ionic gelation method to adsorb mercury ion [Hg (II)] from aqueous solutions. In this line, CS was functionalized with epichlorohydrin/cysteaminium chloride (2.73 M ratio) followed by fabricating NPs via MF and bulk mixing (BM) methods. To characterize the morphology, zeta potential, functionality, structure, and magnetic property of the samples, a series of tests such as SEM, TEM, DLS, FTIR, XRD, and VSM were carried out, respectively. The obtained results showed that MF technique was able to produce NPs with a diameter as small as 18 ± 3 nm, and a uniform shape compared to BM method. Thiol groups (-SH) functionalization on CS surface was confirmed by appearing a characteristic peak at 2579 cm-1. Also, the XRD patterns indicated the appropriate synthesis of Fe3O4 (magnetite), and no change in the structure of CS NPs in the presence of magnetite. Moreover, adding the magnetite to thiol-functionalized CS NPs led to suitable saturation magnetization about 26 emu/g to facilitate their separation using a magnetic field. To evaluate the performance of the nanoadsorbent, it has been exposed to Hg (II) in an aqueous solution which in turn the parameters optimization for the adsorption was done via Box-Behnken design (BBD) method, exhibiting the effect of adsorbent dose and the initial concentration of Hg (II) was much more significant than that of pH. Different concentrations of total dissolved solids up to 1000 mg/L had no adverse impact on the adsorption process confirmed by EDAX spectra. The least value of RMSE (5.023) and χ2 (0.3) were observed for Redlich-Peterson, Radke-Prausnitz, and UT isotherms. Maximum adsorption capacities calculated using Langmuir and UT models were 1192 mg/g and 1126 mg/g, respectively. Thermodynamic studies demonstrated that the nature of the adsorption process was spontaneous and endothermic. Recovery of nanoadsorbent was successfully carried out using HCl 0.5 mol/L. The adsorption studies revealed that the prepared nanoadsorbent is promising candidate used in mercury removal from a real wastewater potentially.
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Affiliation(s)
- Yasaman Nemati
- Nano-Biopolymers Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, P. O. Box, 11155-4563, Tehran, Iran
| | - Payam Zahedi
- Nano-Biopolymers Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, P. O. Box, 11155-4563, Tehran, Iran.
| | - Majid Baghdadi
- School of Environment, College of Engineering, University of Tehran, P. O. Box, 141785-3111, Tehran, Iran
| | - Sahar Ramezani
- Nano-Biopolymers Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, P. O. Box, 11155-4563, Tehran, Iran
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6
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Lima EMB, Lima AM, Minguita APS, Rojas dos Santos NR, Pereira ICS, Neves TTM, da Costa Gonçalves LF, Moreira APD, Middea A, Neumann R, Tavares MIB, Oliveira RN. Poly(lactic acid) biocomposites with mango waste and organo-montmorillonite for packaging. J Appl Polym Sci 2019. [DOI: 10.1002/app.47512] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | - Aline Muniz Lima
- Brazilian Agricultural Research Corporation; EMBRAPA Food Technology; Brazil
| | | | | | | | | | | | - Ana Paula Duarte Moreira
- Materials and Metallurgy Engineering Program/COPPE; Federal University of Rio de Janeiro; Brazil
| | | | | | | | - Renata Nunes Oliveira
- Postgraduate Program of Chemical Engineering/DEQ; Federal Rural University of Rio de Janeiro; Brazil
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7
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Brzeziński M, Socka M, Kost B. Microfluidics for producing polylactide nanoparticles and microparticles and their drug delivery application. POLYM INT 2019. [DOI: 10.1002/pi.5753] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Marek Brzeziński
- Polymer Department, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Łódź Poland
| | - Marta Socka
- Polymer Department, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Łódź Poland
| | - Bartłomiej Kost
- Polymer Department, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Łódź Poland
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8
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A Review of the Synthesis and Applications of Polymer–Nanoclay Composites. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8091696] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Recent advancements in material technologies have promoted the development of various preparation strategies and applications of novel polymer–nanoclay composites. Innovative synthesis pathways have resulted in novel polymer–nanoclay composites with improved properties, which have been successfully incorporated in diverse fields such as aerospace, automobile, construction, petroleum, biomedical and wastewater treatment. These composites are recognized as promising advanced materials due to their superior properties, such as enhanced density, strength, relatively large surface areas, high elastic modulus, flame retardancy, and thermomechanical/optoelectronic/magnetic properties. The primary focus of this review is to deliver an up-to-date overview of polymer–nanoclay composites along with their synthesis routes and applications. The discussion highlights potential future directions for this emerging field of research.
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Wang S, Hou Y, Zhang S, Li J, Chen Q, Yu M, Li W. Sustained antibacterial activity of berberine hydrochloride loaded supramolecular organoclay networks with hydrogen-bonding junctions. J Mater Chem B 2018; 6:4972-4984. [PMID: 32255069 DOI: 10.1039/c8tb01018h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The environmental risk from antibiotics is an issue of increasing concern. So, carboxymethyl β-cyclodextrin-functionalized montmorillonite nanosheets were for the first time successfully synthesized through a cheap, environmentally friendly and scalable approach and confirmed by FTIR, XRD and TGA. FE-SEM investigation showed that the resulting functional material could be further self-assembled into dense supramolecular organoclay networks (D-networks). The antibacterial properties of the D-networks loaded with natural berberine hydrochloride (BBH) were investigated toward E. coli and S. aureus by using colony growth on agar plates, bacterial growth curves based on optical densities, and confocal and fluorescence microscopy. Our studies demonstrated that the BBH loaded D-network antibacterial activity was concentration dependent and significantly exceeded that of free BBH. FE-SEM observation confirmed that E. coli and S. aureus can directly contact the D-networks and confocal and fluorescence microscopy showed that free BBH was only very poorly internalized, while the BBH released from the BBH-loaded D-network could be internalized efficiently into bacterial cells, resulting in an increment of the intracellular BBH level compared with the free BBH group. Time-dependent antibacterial activity was observed and it was found that the BBH-loaded D-network dispersion at the BBH dosage of 600 μg mL-1 almost completely suppressed the growth of E. coli, leading to a viability loss of up to 98.45 ± 1.22%, while the BBH-loaded D-network dispersion at the BBH concentration of 250 μg mL-1 exhibited a growth inhibition of 97.81 ± 0.83% toward S. aureus over three days. Our results suggest that supramolecular organoclay networks, in the future, may function as promising antibacterial drug carrier systems to promote BBH delivery in E. coli and S. aureus, which can reduce the environmental risk of antibiotics.
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Affiliation(s)
- Shiwei Wang
- Department of Medicinal Chemistry, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P. R. China.
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10
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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: 174] [Impact Index Per Article: 29.0] [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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11
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Othman R, Vladisavljević GT, Simone E, Nagy ZK, Holdich RG. Preparation of Microcrystals of Piroxicam Monohydrate by Antisolvent Precipitation via Microfabricated Metallic Membranes with Ordered Pore Arrays. CRYSTAL GROWTH & DESIGN 2017; 17:6692-6702. [PMID: 29234241 PMCID: PMC5722433 DOI: 10.1021/acs.cgd.7b01307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/09/2017] [Indexed: 05/25/2023]
Abstract
Microcrystals of piroxicam (PRX) monohydrate with a narrow size distribution were prepared from acetone/PRX solutions by antisolvent crystallization via metallic membranes with ordered pore arrays. Crystallization was achieved by controlled addition of the feed solution through the membrane pores into a well-stirred antisolvent. A complete transformation of an anhydrous form I into a monohydrate form of PRX was confirmed by Raman spectroscopy and differential scanning calorimetry. The size of the crystals was 7-34 μm and was controlled by the PRX concentration in the feed solution (15-25 g L-1), antisolvent/solvent volume ratio (5-30), and type of antisolvent (Milli-Q water or 0.1-0.5 wt % aqueous solutions of hydroxypropyl methyl cellulose (HPMC), poly(vinyl alcohol) or Pluronic P-123). The smallest crystals were obtained by injecting 25 g L-1 PRX solution through a stainless-steel membrane with a pore size of 10 μm into a 0.06 wt % HPMC solution stirred at 1500 rpm using an antisolvent/solvent ratio of 20. HPMC provided better steric stabilization of microcrystals against agglomeration than poly(vinyl alcohol) and Pluronic P-123, due to hydrogen bonding interactions with PRX and water. A continuous production of large PRX monohydrate microcrystals with a volume-weighted mean diameter above 75 μm was achieved in a continuous stirred membrane crystallizer. Rapid pouring of Milli-Q water into the feed solution resulted in a mixture of highly polydispersed prism-shaped and needle-shaped crystals.
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Affiliation(s)
- Rahimah Othman
- Department
of Chemical Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K.
- School
of Bioprocess Engineering, Universiti Malaysia
Perlis, Kompleks Pusat
Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia
| | - Goran T. Vladisavljević
- Department
of Chemical Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K.
| | - Elena Simone
- Department
of Chemical Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K.
- School
of Food Science and Nutrition, University
of Leeds, Leeds, LS29JT, U.K.
| | - Zoltan K. Nagy
- Department
of Chemical Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K.
- School
of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-2100, United States
| | - Richard G. Holdich
- Department
of Chemical Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K.
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12
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Odetade DF, Vladisavljevic GT. Microfluidic Fabrication of Hydrocortisone Nanocrystals Coated with Polymeric Stabilisers. MICROMACHINES 2016; 7:mi7120236. [PMID: 30404408 PMCID: PMC6190127 DOI: 10.3390/mi7120236] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/02/2016] [Accepted: 12/14/2016] [Indexed: 11/26/2022]
Abstract
Hydrocortisone (HC) nanocrystals intended for parenteral administration of HC were produced by anti-solvent crystallisation within coaxial assemblies of pulled borosilicate glass capillaries using either co-current flow of aqueous and organic phases or counter-current flow focusing. The organic phase was composed of 7 mg/mL of HC in a 60:40 (v/v) mixture of ethanol and water and the anti-solvent was milli-Q water. The microfluidic mixers were fabricated with an orifice diameter of the inner capillary ranging from 50 µm to 400 µm and operated at the aqueous to organic phase flow rate ratio ranging from 5 to 25. The size of the nanocrystals decreased with increasing aqueous to organic flow rate ratio. The counter-current flow microfluidic mixers provided smaller nanocrystals than the co-current flow devices under the same conditions and for the same geometry, due to smaller diameter of the organic phase stream in the mixing zone. The Z-average particle size of the drug nanocrystals increased from 210–280 nm to 320–400 nm after coating the nanocrystals with 0.2 wt % aqueous solution of hydroxypropyl methylcellulose (HPMC) in a stirred vial. The differential scanning calorimetry (DSC) and X-ray powder diffraction (XRPD) analyses carried out on the dried nanocrystals stabilized with HPMC, polyvinyl pyrrolidone (PVP), and sodium lauryl sulfate (SLS) were investigated and reported. The degree of crystallinity for the processed sample was lowest for the sample stabilised with HPMC and the highest for the raw HC powder.
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Affiliation(s)
- David F Odetade
- Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough, Leicestershire LE11 3TU, UK.
| | - Goran T Vladisavljevic
- Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough, Leicestershire LE11 3TU, UK.
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Armada-Moreira A, Taipaleenmäki E, Itel F, Zhang Y, Städler B. Droplet-microfluidics towards the assembly of advanced building blocks in cell mimicry. NANOSCALE 2016; 8:19510-19522. [PMID: 27858045 DOI: 10.1039/c6nr07807a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Therapeutic cell mimicry is an approach in nanomedicine aiming at substituting for missing or lost cellular functions employing nature-inspired concepts. Pioneered decades ago, only now is this technology empowered with the arsenal of nanotechnological tools and ready to provide radically new solutions such as assembling synthetic organelles and artificial cells. One of these tools is droplet microfluidics (D-μF), which provides the flexibility to generate cargo-loaded particles with tunable size and shape in a fast and reliable manner, an essential requirement in cell mimicry. This minireview aims at outlining the developments in D-μF from the past four years focusing on the assembly of nanoparticles, Janus-shaped and other non-spherical particles as well as their loading with biological payloads.
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Affiliation(s)
- Adam Armada-Moreira
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark. and Instituto de Farmacologia e Neurociências, Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal and Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Essi Taipaleenmäki
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Fabian Itel
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Yan Zhang
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
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Othman R, Vladisavljević GT, Nagy ZK, Holdich RG. Encapsulation and Controlled Release of Rapamycin from Polycaprolactone Nanoparticles Prepared by Membrane Micromixing Combined with Antisolvent Precipitation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10685-10693. [PMID: 27690454 DOI: 10.1021/acs.langmuir.6b03178] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Rapamycin-loaded polycaprolactone nanoparticles (RAPA-PCL NPs) with a polydispersity index of 0.006-0.073 were fabricated by antisolvent precipitation combined with micromixing using a ringed stainless steel membrane with 10 μm diameter laser-drilled pores. The organic phase composed of 6 g L-1 PCL and 0.6-3.0 g L-1 RAPA in acetone was injected through the membrane at 140 L m-2 h-1 into 0.2 wt % aqueous poly(vinyl alcohol) solution stirred at 1300 rpm, resulting in a Z-average mean of 189-218 nm, a drug encapsulation efficiency of 98.8-98.9%, and a drug loading in the NPs of 9-33%. The encapsulation of RAPA was confirmed by UV-vis spectroscopy, XRD, DSC, and ATR-FTIR. The disappearance of sharp characteristic peaks of crystalline RAPA in the XRD pattern of RAPA-PCL NPs revealed that the drug was molecularly dispersed in the polymer matrix or RAPA and PCL were present in individual amorphous domains. The rate of drug release in pure water was negligible due to low aqueous solubility of RAPA. RAPA-PCL NPs released more than 91% of their drug cargo after 2.5 h in the release medium composed of 0.78-1.5 M of the hydrotropic agent N,N-diethylnicotinamide, 10 vol % ethanol, and 2 vol % Tween 20 in phosphate buffered saline. The dissolution of RAPA was slower when the drug was embedded in the PCL matrix of the NPs than dispersed in the form of pure RAPA nanocrystals.
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Affiliation(s)
- Rahimah Othman
- Department of Chemical Engineering, Loughborough University , Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K
- School of Bioprocess Engineering, Universiti Malaysia Perlis , Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia
| | - Goran T Vladisavljević
- Department of Chemical Engineering, Loughborough University , Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K
| | - Zoltan K Nagy
- Department of Chemical Engineering, Loughborough University , Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K
- School of Chemical Engineering, Purdue University , West Lafayette, Indiana 47907-2100, United States
| | - R G Holdich
- Department of Chemical Engineering, Loughborough University , Ashby Road, Loughborough, Leicestershire LE11 3TU, U.K
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