1
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Kim J, Choi YJ, Park H, Yun HS. Fabrication of multifunctional alginate microspheres containing hydroxyapatite powder for simultaneous cell and drug delivery. Front Bioeng Biotechnol 2022; 10:827626. [PMID: 36017354 PMCID: PMC9395714 DOI: 10.3389/fbioe.2022.827626] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
Novel alginate-hydroxyapatite hybrid microspheres were developed for simultaneous delivery of drugs and cells as a multifunctional bone substitute for osteoporotic bone tissue regeneration. The microspheres were used to enhance osteogenesis and to carry and deliver quercetin, a representative phytoestrogen that controls bone tissue regeneration metabolism in osteoporosis patients, through sustained release over a long period. To overcome quercetin’s hydrophobicity and low solubility in aqueous environments, we added it to the surface of hydroxyapatite (HAp) nanoparticles before mixing them with an alginate solution. The homogeneous distribution of the HAp nanoparticles in the alginate solution was essential for preventing nozzle clogging and achieving successfully fabricated hybrid microspheres. To this end, a 3D ultrasonic treatment was applied. Electrostatic microencapsulation was then used to fabricate hybrid alginate-HAp microspheres containing quercetin and cells. The microspheres were approximately 290.7 ± 42.5 μm (aspect ratio of 1). The sustained release of quercetin was confirmed during a test period of 20 weeks. The cells in the hybrid microspheres maintained good cell viability during the entire testing period, and their osteogenic differentiation behavior was boosted by the presence of HAp. Thus, osteogenic differentiation could be greatly improved by adding quercetin. These novel multi-biofunctional hybrid microspheres have great potential for the regeneration of osteoporotic bone tissue at indeterminate defect sites.
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Affiliation(s)
- Jueun Kim
- Department of Advanced Materials Engineering, University of Science & Technology (UST), Daejeon, South Korea
- Ceramic Materials Division, Department of Advanced Biomaterials Research, Korea Institute of Materials Science (KIMS), Changwon, South Korea
| | - Yeong-Jin Choi
- Ceramic Materials Division, Department of Advanced Biomaterials Research, Korea Institute of Materials Science (KIMS), Changwon, South Korea
| | - Honghyun Park
- Ceramic Materials Division, Department of Advanced Biomaterials Research, Korea Institute of Materials Science (KIMS), Changwon, South Korea
- *Correspondence: Honghyun Park, ; Hui-suk Yun,
| | - Hui-suk Yun
- Department of Advanced Materials Engineering, University of Science & Technology (UST), Daejeon, South Korea
- Ceramic Materials Division, Department of Advanced Biomaterials Research, Korea Institute of Materials Science (KIMS), Changwon, South Korea
- *Correspondence: Honghyun Park, ; Hui-suk Yun,
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2
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Chen P, Lu S, Pan B, Xu Y. Development, Optimization, and Pharmacokinetics Study of Bufalin/Nintedanib Co-loaded Modified Albumin Sub-microparticles Fabricated by Coaxial Electrostatic Spray Technology. AAPS PharmSciTech 2021; 23:13. [PMID: 34888752 DOI: 10.1208/s12249-021-02163-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 10/14/2021] [Indexed: 12/14/2022] Open
Abstract
Coaxial electrostatic spray technology has received extensive attention in fabricating micro/nanoparticles for drug delivery. However, there are few reports on applying this technology in preparing albumin nanoparticles. In this study, the bufalin (BF) and nintedanib (NDNB) co-loaded ursodeoxycholic acid and p-biguanides benzoic acid decorated albumin sub-microparticles (BN-DUB subMPs) were fabricated by coaxial electrostatic spray technology and optimized by central composite design. Five percent of albumin (contained 0.7% polyethylene oxide) solution was selected as the shell solution which ejected through outer axis with the flow rate of 0.07 mm/min, while the core solution which contained by BF and NDNB ethanol solution was ejected through inner axis with the flow rate of 0.05 mm/min. In vitro cell studies revealed that the modified albumin possessed good biocompatibility. What's more, the BN-DUB subMPs enhanced the inhibitory effect on the growth of LLC cells efficiently. The pharmacokinetics study showed that the t1/2 and AUC0-t of BN-DUB subMPs increased significantly compared with that of the drug solution, which indicated the improved in vivo stability of modified albumin nanoparticles. Thus, this study provided a novel and simple technical platform for the development of albumin-based drug carriers.
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van der Kooij RS, Steendam R, Frijlink HW, Hinrichs WLJ. An overview of the production methods for core-shell microspheres for parenteral controlled drug delivery. Eur J Pharm Biopharm 2021; 170:24-42. [PMID: 34861359 DOI: 10.1016/j.ejpb.2021.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 10/19/2021] [Accepted: 11/26/2021] [Indexed: 01/25/2023]
Abstract
Core-shell microspheres hold great promise as a drug delivery system because they offer several benefits over monolithic microspheres in terms of release kinetics, for instance a reduced initial burst release, the possibility of delayed (pulsatile) release, and the possibility of dual-drug release. Also, the encapsulation efficiency can significantly be improved. Various methods have proven to be successful in producing these core-shell microspheres, both the conventional bulk emulsion solvent evaporation method and methods in which the microspheres are produced drop by drop. The latter have become increasingly popular because they provide improved control over the particle characteristics. This review assesses various production methods for core-shell microspheres and summarizes the characteristics of formulations prepared by the different methods, with a focus on their release kinetics.
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Affiliation(s)
- Renée S van der Kooij
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Rob Steendam
- InnoCore Pharmaceuticals, L.J. Zielstraweg 1, 9713 GX Groningen, The Netherlands
| | - Henderik W Frijlink
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Wouter L J Hinrichs
- Department of Pharmaceutical Technology and Biopharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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4
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Tanhaei A, Mohammadi M, Hamishehkar H, Hamblin MR. Electrospraying as a novel method of particle engineering for drug delivery vehicles. J Control Release 2021; 330:851-865. [DOI: 10.1016/j.jconrel.2020.10.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 10/26/2020] [Accepted: 10/28/2020] [Indexed: 02/07/2023]
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5
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Zhao Q, Wang M. Manipulating the release of growth factors from biodegradable microspheres for potentially different therapeutic effects by using two different electrospray techniques for microsphere fabrication. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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6
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Coaxial electrospraying of biopolymers as a strategy to improve protection of bioactive food ingredients. INNOV FOOD SCI EMERG 2019. [DOI: 10.1016/j.ifset.2018.03.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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7
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Ratheesh G, Tian L, Venugopal JR, Ezhilarasu H, Sadiq A, Fan TP, Ramakrishna S. Role of medicinal plants in neurodegenerative diseases. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/s40898-017-0004-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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8
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Impact of Acetic Acid on the Survival of L. plantarum upon Microencapsulation by Coaxial Electrospraying. JOURNAL OF HEALTHCARE ENGINEERING 2017; 2017:4698079. [PMID: 29065607 PMCID: PMC5516755 DOI: 10.1155/2017/4698079] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/04/2017] [Indexed: 01/25/2023]
Abstract
In this work, coaxial electrospraying was used for the first time to microencapsulate probiotic bacteria, specifically Lactobacillus plantarum, within edible protein particles with the aim of improving their resistance to in vitro digestion. The developed structures, based on an inner core of whey protein concentrate and an outer layer of gelatin, were obtained in the presence of acetic acid in the outer solution as a requirement for the electrospraying of gelatin. Despite the limited contact of the inner suspension and outer solution during electrospraying, the combination of the high voltage used during electrospraying with the presence of acetic acid was found to have a severe impact on the lactobacilli, not only decreasing initial viability but also negatively affecting the survival of the bacteria during storage and their resistance to different stress conditions, including simulated in vitro digestion.
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He X. Microscale Biomaterials with Bioinspired Complexity of Early Embryo Development and in the Ovary for Tissue Engineering and Regenerative Medicine. ACS Biomater Sci Eng 2016; 3:2692-2701. [PMID: 29367949 DOI: 10.1021/acsbiomaterials.6b00540] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Tissue engineering and regenerative medicine (TERM) are attracting more and more attention for treating various diseases in modern medicine. Various biomaterials including hydrogels and scaffolds have been developed to prepare cells (particularly stem cells) and tissues under 3D conditions for TERM applications. Although these biomaterials are usually homogeneous in early studies, effort has been made recently to generate biomaterials with the spatiotemporal complexities present in the native milieu of the specific cells and tissues under investigation. In this communication, the microfluidic and coaxial electrospray approaches that we used for generating microscale biomaterials with the spatial complexity of both pre-hatching embryos and ovary in the female reproductive system were introduced. This is followed by an overview of our recent work on applying the resultant bioinspired biomaterials for cultivation of normal and cancer stem cells, regeneration of cardiac tissue, and culture of ovarian follicles. The cardiac regeneration studies show the importance of using different biomaterials to engineer stem cells at different stages (i.e., in vitro culture versus in vivo implantation) for tissue regeneration. All the studies demonstrate the merit of accounting for bioinspired complexities in engineering cells and tissues for TERM applications.
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Affiliation(s)
- Xiaoming He
- Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 43210, USA.,Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio 43210, USA.,Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA
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Gallovic MD, Schully KL, Bell MG, Elberson MA, Palmer JR, Darko CA, Bachelder EM, Wyslouzil BE, Keane-Myers AM, Ainslie KM. Acetalated Dextran Microparticulate Vaccine Formulated via Coaxial Electrospray Preserves Toxin Neutralization and Enhances Murine Survival Following Inhalational Bacillus Anthracis Exposure. Adv Healthc Mater 2016; 5:2617-2627. [PMID: 27594343 DOI: 10.1002/adhm.201600642] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 07/20/2016] [Indexed: 12/30/2022]
Abstract
Subunit formulations are regarded as the safest type of vaccine, but they often contain a protein-based antigen that can result in significant challenges, such as preserving antigenicity during formulation and administration. Many studies have demonstrated that encapsulation of protein antigens in polymeric microparticles (MPs) via emulsion techniques results in total IgG antibody titers comparable to alum formulations, however, the antibodies themselves are non-neutralizing. To address this issue, a coaxial electrohydrodynamic spraying (electrospray) technique is used to formulate a microparticulate-based subunit anthrax vaccine under conditions that minimize recombinant protective antigen (rPA) exposure to harsh solvents and high shear stress. rPA and the adjuvant resiquimod are encapsulated either in separate or the same acetalated dextran MPs. Using a murine model, the electrospray formulations lead to higher IgG2a subtype titers as well as comparable total IgG antibody titers and toxin neutralization relative to the FDA-approved vaccine (BioThrax). BioThrax provides no protection against a lethal inhalational challenge of the highly virulent Ames Bacillus anthracis anthrax strain, whereas 50% of the mice vaccinated with separately encapsulated electrospray MPs survive. Overall, this study demonstrates the potential use of electrospray for encapsulating protein antigens in polymeric MPs.
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Affiliation(s)
- Matthew D. Gallovic
- Department of Chemical and Biomolecular Engineering; College of Engineering; The Ohio State University; Columbus OH 43210 USA
- Division of Molecular Pharmaceutics; Eshelman School of Pharmacy; University of North Carolina; Chapel Hill NC 27599 USA
| | - Kevin L. Schully
- Vaccine and Medical Countermeasures Department; Biological Defense Research Directorate; Naval Medical Research Center; Fort Detrick MD 20910 USA
| | - Matthew G. Bell
- Vaccine and Medical Countermeasures Department; Biological Defense Research Directorate; Naval Medical Research Center; Fort Detrick MD 20910 USA
| | - Margaret A. Elberson
- Vaccine and Medical Countermeasures Department; Biological Defense Research Directorate; Naval Medical Research Center; Fort Detrick MD 20910 USA
| | - John R. Palmer
- Vaccine and Medical Countermeasures Department; Biological Defense Research Directorate; Naval Medical Research Center; Fort Detrick MD 20910 USA
| | - Christian A. Darko
- Vaccine and Medical Countermeasures Department; Biological Defense Research Directorate; Naval Medical Research Center; Fort Detrick MD 20910 USA
| | - Eric M. Bachelder
- Division of Molecular Pharmaceutics; Eshelman School of Pharmacy; University of North Carolina; Chapel Hill NC 27599 USA
| | - Barbara E. Wyslouzil
- Department of Chemical and Biomolecular Engineering; College of Engineering; The Ohio State University; Columbus OH 43210 USA
- Department of Chemistry and Biochemistry; College of Arts and Sciences; The Ohio State University; Columbus OH 43210 USA
| | - Andrea M. Keane-Myers
- Vaccine and Medical Countermeasures Department; Biological Defense Research Directorate; Naval Medical Research Center; Fort Detrick MD 20910 USA
| | - Kristy M. Ainslie
- Division of Molecular Pharmaceutics; Eshelman School of Pharmacy; University of North Carolina; Chapel Hill NC 27599 USA
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11
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Pharmaceutical Applications of Electrospraying. J Pharm Sci 2016; 105:2601-2620. [DOI: 10.1016/j.xphs.2016.04.024] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 04/14/2016] [Accepted: 04/22/2016] [Indexed: 02/01/2023]
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12
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Chen J, Dai H, Lin H, Tu K, Wang H, Wang LQ. A new strategy based on electrospray technique to prepare dual-responsive poly(ether urethane) nanogels. Colloids Surf B Biointerfaces 2016; 141:278-283. [DOI: 10.1016/j.colsurfb.2016.01.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 01/05/2016] [Accepted: 01/27/2016] [Indexed: 12/27/2022]
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13
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Song Y, Chan YK, Ma Q, Liu Z, Shum HC. All-Aqueous Electrosprayed Emulsion for Templated Fabrication of Cytocompatible Microcapsules. ACS APPLIED MATERIALS & INTERFACES 2015; 7:13925-33. [PMID: 26053733 DOI: 10.1021/acsami.5b02708] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Encapsulation of biomolecules and cells in hydrogel capsules via emulsion templating frequently induces an irreversible loss of bioactivity, because of the use of nonaqueous solvents. Here, we introduce an all-aqueous electrospray (AAE) approach to generate aqueous two-phase emulsion droplets, and we use them as templates to fabricate microcapsules with preserved cell viability. The approach allows formation of monodisperse microparticles with tunable sizes, variable compositions, and interior architectures in a mild gelation process. This technique potentially benefits a variety of new biomedical applications, such as delivery of bioactive proteins, transplantation of living cells, and assembly of cell-mimicking structures.
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Affiliation(s)
- Yang Song
- ‡HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518000, China
- †Department of Mechanical Engineering, University of Hong Kong, Hong Kong
| | - Yau Kei Chan
- †Department of Mechanical Engineering, University of Hong Kong, Hong Kong
- §Department of Ophthalmology, University of Hong Kong, Hong Kong
| | - Qingming Ma
- ‡HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518000, China
- †Department of Mechanical Engineering, University of Hong Kong, Hong Kong
| | - Zhou Liu
- ‡HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518000, China
- †Department of Mechanical Engineering, University of Hong Kong, Hong Kong
| | - Ho Cheung Shum
- ‡HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518000, China
- †Department of Mechanical Engineering, University of Hong Kong, Hong Kong
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14
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Zhao S, Agarwal P, Rao W, Huang H, Zhang R, Liu Z, Yu J, Weisleder N, Zhang W, He X. Coaxial electrospray of liquid core-hydrogel shell microcapsules for encapsulation and miniaturized 3D culture of pluripotent stem cells. Integr Biol (Camb) 2015; 6:874-84. [PMID: 25036382 DOI: 10.1039/c4ib00100a] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A novel coaxial electrospray technology is developed to generate microcapsules with a hydrogel shell of alginate and an aqueous liquid core of living cells using two aqueous fluids in one step. Approximately 50 murine embryonic stem (ES) cells encapsulated in the core with high viability (92.3 ± 2.9%) can proliferate to form a single ES cell aggregate of 128.9 ± 17.4 μm in each microcapsule within 7 days. Quantitative analyses of gene and protein expression indicate that ES cells cultured in the miniaturized 3D liquid core of the core-shell microcapsules have significantly higher pluripotency on average than the cells cultured on the 2D substrate or in the conventional 3D alginate hydrogel microbeads without a core-shell architecture. The higher pluripotency is further suggested by their significantly higher capability of differentiation into beating cardiomyocytes and higher expression of cardiomyocyte specific gene markers on average after directed differentiation under the same conditions. Considering its wide availability, easiness to set up and operate, reusability, and high production rate, the novel coaxial electrospray technology together with the microcapsule system is of importance for mass production of ES cells with high pluripotency to facilitate translation of the emerging pluripotent stem cell-based regenerative medicine into the clinic.
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Affiliation(s)
- Shuting Zhao
- Department of Biomedical Engineering, The Ohio State University, 1080 Carmack Road, Columbus, OH 43210, USA.
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15
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Coaxial electrohydrodynamic atomization: Microparticles for drug delivery applications. J Control Release 2015; 205:70-82. [DOI: 10.1016/j.jconrel.2014.12.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/01/2014] [Accepted: 12/03/2014] [Indexed: 12/20/2022]
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16
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Xie J, Jiang J, Davoodi P, Srinivasan MP, Wang CH. Electrohydrodynamic atomization: A two-decade effort to produce and process micro-/nanoparticulate materials. Chem Eng Sci 2015; 125:32-57. [PMID: 25684778 PMCID: PMC4322784 DOI: 10.1016/j.ces.2014.08.061] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Electrohydrodynamic atomization (EHDA), also called electrospray technique, has been studied for more than one century. However, since 1990s it has begun to be used to produce and process micro-/nanostructured materials. Owing to the simplicity and flexibility in EHDA experimental setup, it has been successfully employed to generate particulate materials with controllable compositions, structures, sizes, morphologies, and shapes. EHDA has also been used to deposit micro- and nanoparticulate materials on surfaces in a well-controlled manner. All these attributes make EHDA a fascinating tool for preparing and assembling a wide range of micro- and nanostructured materials which have been exploited for use in pharmaceutics, food, and healthcare to name a few. Our goal is to review this field, which allows scientists and engineers to learn about the EHDA technique and how it might be used to create, process, and assemble micro-/nanoparticulate materials with unique and intriguing properties. We begin with a brief introduction to the mechanism and setup of EHDA technique. We then discuss issues critical to successful application of EHDA technique, including control of composition, size, shape, morphology, structure of particulate materials and their assembly. We also illustrate a few of the many potential applications of particulate materials, especially in the area of drug delivery and regenerative medicine. Next, we review the simulation and modeling of Taylor cone-jet formation for a single and co-axial nozzle. The mathematical modeling of particle transport and deposition is presented to provide a deeper understanding of the effective parameters in the preparation, collection and pattering processes. We conclude this article with a discussion on perspectives and future possibilities in this field.
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Affiliation(s)
- Jingwei Xie
- Department of Pharmaceutical Sciences and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Jiang Jiang
- Department of Pharmaceutical Sciences and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Pooya Davoodi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - M. P. Srinivasan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - Chi-Hwa Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
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17
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Teekamp N, Duque LF, Frijlink HW, Hinrichs WLJ, Olinga P. Production methods and stabilization strategies for polymer-based nanoparticles and microparticles for parenteral delivery of peptides and proteins. Expert Opin Drug Deliv 2015; 12:1311-31. [DOI: 10.1517/17425247.2015.1003807] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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18
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Zhang C, Chang MW, Ahmad Z, Hu W, Zhao D, Li JS. Stable single device multi-pore electrospraying of polymeric microparticles via controlled electrostatic interactions. RSC Adv 2015. [DOI: 10.1039/c5ra18482g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel flute-like multi-pore electrospray emitter was designed and manufactured to enable economical scale-up smooth spherical microparticles. The effect of processing parameters and device configuration on particle sizes is described.
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Affiliation(s)
- Chunchen Zhang
- College of Biomedical Engineering and Instrument Science
- Zhejiang University
- Hangzhou
- P. R. China
- Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal
| | - Ming-Wei Chang
- College of Biomedical Engineering and Instrument Science
- Zhejiang University
- Hangzhou
- P. R. China
- Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal
| | - Zeeshan Ahmad
- Leicester School of Pharmacy
- De Montfort, University
- Leicester
- UK
| | - Weiwen Hu
- College of Electrical Engineering
- Zhejiang University
- Hangzhou
- P. R. China
| | - Ding Zhao
- College of Biomedical Engineering and Instrument Science
- Zhejiang University
- Hangzhou
- P. R. China
- Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal
| | - Jing-Song Li
- College of Biomedical Engineering and Instrument Science
- Zhejiang University
- Hangzhou
- P. R. China
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Paik DH, Choi SW. Entrapment of protein using electrosprayed poly(D,L-lactide-co-glycolide) microspheres with a porous structure for sustained release. Macromol Rapid Commun 2014; 35:1033-8. [PMID: 24700776 DOI: 10.1002/marc.201400042] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 02/17/2014] [Indexed: 11/10/2022]
Abstract
The entrapment of a protein in porous poly(D,L-lactide-co-glycolide) (PLGA) microspheres is demonstrated through the closure of their outer surface pores for sustained delivery of the protein. The porous PLGA microspheres with less than 10 μm in size are prepared by electrospraying. Aqueous solutions containing fluorescein isothiocyanate-dextran or bovine serum albumin (BSA) are penetrated into the inner pores as a result of vacuum treatment, and the outer surface pores of the porous PLGA microspheres are then closed using a solvent (dimethyl sulfoxide) to ensure entrapment of the macromolecules. Confocal microscopy images confirm the presence of a large amount of the macromolecules inside the porous structure. Circular dichroism spectroscopy and release analysis reveal that BSA is entrapped without denaturation and released in a sustained manner for a period of over 2 months, respectively.
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Affiliation(s)
- Dong-Hyun Paik
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do, 420-743, Republic of Korea
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20
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Almería B, Gomez A. Electrospray synthesis of monodisperse polymer particles in a broad (60nm–2μm) diameter range: guiding principles and formulation recipes. J Colloid Interface Sci 2014; 417:121-30. [DOI: 10.1016/j.jcis.2013.11.037] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 10/30/2013] [Accepted: 11/04/2013] [Indexed: 10/26/2022]
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21
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Scaffold-mediated lentiviral transduction for functional tissue engineering of cartilage. Proc Natl Acad Sci U S A 2014; 111:E798-806. [PMID: 24550481 DOI: 10.1073/pnas.1321744111] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The ability to develop tissue constructs with matrix composition and biomechanical properties that promote rapid tissue repair or regeneration remains an enduring challenge in musculoskeletal engineering. Current approaches require extensive cell manipulation ex vivo, using exogenous growth factors to drive tissue-specific differentiation, matrix accumulation, and mechanical properties, thus limiting their potential clinical utility. The ability to induce and maintain differentiation of stem cells in situ could bypass these steps and enhance the success of engineering approaches for tissue regeneration. The goal of this study was to generate a self-contained bioactive scaffold capable of mediating stem cell differentiation and formation of a cartilaginous extracellular matrix (ECM) using a lentivirus-based method. We first showed that poly-L-lysine could immobilize lentivirus to poly(ε-caprolactone) films and facilitate human mesenchymal stem cell (hMSC) transduction. We then demonstrated that scaffold-mediated gene delivery of transforming growth factor β3 (TGF-β3), using a 3D woven poly(ε-caprolactone) scaffold, induced robust cartilaginous ECM formation by hMSCs. Chondrogenesis induced by scaffold-mediated gene delivery was as effective as traditional differentiation protocols involving medium supplementation with TGF-β3, as assessed by gene expression, biochemical, and biomechanical analyses. Using lentiviral vectors immobilized on a biomechanically functional scaffold, we have developed a system to achieve sustained transgene expression and ECM formation by hMSCs. This method opens new avenues in the development of bioactive implants that circumvent the need for ex vivo tissue generation by enabling the long-term goal of in situ tissue engineering.
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Electrosprayed Microparticles with Loaded pDNA-Calcium Phosphate Nanoparticles to Promote the Regeneration of Mature Blood Vessels. Pharm Res 2013; 31:874-86. [DOI: 10.1007/s11095-013-1209-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 09/12/2013] [Indexed: 01/08/2023]
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Ge J, Jacobson GB, Lobovkina T, Holmberg K, Zare RN. Sustained release of nucleic acids from polymeric nanoparticles using microemulsion precipitation in supercritical carbon dioxide. Chem Commun (Camb) 2010; 46:9034-6. [DOI: 10.1039/c0cc04258g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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