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Scheiner KC, Maas-Bakker RF, van Steenbergen MJ, Schwendeman SP, Hennink WE, Kok RJ. Post-loading of proangiogenic growth factors in PLGA microspheres. Eur J Pharm Biopharm 2021; 158:1-10. [DOI: 10.1016/j.ejpb.2020.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 10/07/2020] [Accepted: 10/10/2020] [Indexed: 02/07/2023]
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Hydrogels as Drug Delivery Systems: A Review of Current Characterization and Evaluation Techniques. Pharmaceutics 2020; 12:pharmaceutics12121188. [PMID: 33297493 PMCID: PMC7762425 DOI: 10.3390/pharmaceutics12121188] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 12/15/2022] Open
Abstract
Owing to their tunable properties, controllable degradation, and ability to protect labile drugs, hydrogels are increasingly investigated as local drug delivery systems. However, a lack of standardized methodologies used to characterize and evaluate drug release poses significant difficulties when comparing findings from different investigations, preventing an accurate assessment of systems. Here, we review the commonly used analytical techniques for drug detection and quantification from hydrogel delivery systems. The experimental conditions of drug release in saline solutions and their impact are discussed, along with the main mathematical and statistical approaches to characterize drug release profiles. We also review methods to determine drug diffusion coefficients and in vitro and in vivo models used to assess drug release and efficacy with the goal to provide guidelines and harmonized practices when investigating novel hydrogel drug delivery systems.
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4
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Moreira A, Lawson D, Onyekuru L, Dziemidowicz K, Angkawinitwong U, Costa PF, Radacsi N, Williams GR. Protein encapsulation by electrospinning and electrospraying. J Control Release 2020; 329:1172-1197. [PMID: 33127450 DOI: 10.1016/j.jconrel.2020.10.046] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 12/24/2022]
Abstract
Given the increasing interest in the use of peptide- and protein-based agents in therapeutic strategies, it is fundamental to develop delivery systems capable of preserving the biological activity of these molecules upon administration, and which can provide tuneable release profiles. Electrohydrodynamic (EHD) techniques, encompassing electrospinning and electrospraying, allow the generation of fibres and particles with high surface area-to-volume ratios, versatile architectures, and highly controllable release profiles. This review is focused on exploring the potential of different EHD methods (including blend, emulsion, and co-/multi-axial electrospinning and electrospraying) for the development of peptide and protein delivery systems. An overview of the principles of each technique is first presented, followed by a survey of the literature on the encapsulation of enzymes, growth factors, antibodies, hormones, and vaccine antigens using EHD approaches. The possibility for localised delivery using stimuli-responsive systems is also explored. Finally, the advantages and challenges with each EHD method are summarised, and the necessary steps for clinical translation and scaled-up production of electrospun and electrosprayed protein delivery systems are discussed.
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Affiliation(s)
| | - Dan Lawson
- School of Engineering, Institute for Materials and Processes, The University of Edinburgh, Robert Stevenson Road, Edinburgh EH9 3FB, UK
| | - Lesley Onyekuru
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Karolina Dziemidowicz
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Ukrit Angkawinitwong
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Pedro F Costa
- BIOFABICS, Rua Alfredo Allen 455, 4200-135 Porto, Portugal.
| | - Norbert Radacsi
- School of Engineering, Institute for Materials and Processes, The University of Edinburgh, Robert Stevenson Road, Edinburgh EH9 3FB, UK.
| | - Gareth R Williams
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK.
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Morais AÍS, Vieira EG, Afewerki S, Sousa RB, Honorio LMC, Cambrussi ANCO, Santos JA, Bezerra RDS, Furtini JAO, Silva-Filho EC, Webster TJ, Lobo AO. Fabrication of Polymeric Microparticles by Electrospray: The Impact of Experimental Parameters. J Funct Biomater 2020; 11:jfb11010004. [PMID: 31952157 PMCID: PMC7151563 DOI: 10.3390/jfb11010004] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/10/2020] [Accepted: 01/10/2020] [Indexed: 02/06/2023] Open
Abstract
Microparticles (MPs) with controlled morphologies and sizes have been investigated by several researchers due to their importance in pharmaceutical, ceramic, cosmetic, and food industries to just name a few. In particular, the electrospray (ES) technique has been shown to be a viable alternative for the development of single particles with different dimensions, multiple layers, and varied morphologies. In order to adjust these properties, it is necessary to optimize different experimental parameters, such as polymer solvent, voltage, flow rate (FR), type of collectors, and distance between the collector and needle tip, which will all be highlighted in this review. Moreover, the influence and contributions of each of these parameters on the design and fabrication of polymeric MPs are described. In addition, the most common configurations of ES systems for this purpose are discussed, for instance, the main configuration of an ES system with monoaxial, coaxial, triaxial, and multi-capillary delivery. Finally, the main types of collectors employed, types of synthesized MPs and their applications specifically in the pharmaceutical and biomedical fields will be emphasized. To date, ES is a promising and versatile technology with numerous excellent applications in the pharmaceutical and biomaterials field and such MPs generated should be employed for the improved treatment of cancer, healing of bone, and other persistent medical problems.
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Affiliation(s)
- Alan Í. S. Morais
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Ewerton G. Vieira
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Samson Afewerki
- Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, Brigham & Women’s Hospital, Cambridge, MA 02139, USA;
- Harvard-MIT Division of Health Science and Technology, Massachusetts Institute of Technology, MIT, Cambridge, MA 02139, USA
| | - Ricardo B. Sousa
- Federal Institute of Education, Science and Technology of Tocantins, Dianápolis Campus, IFTO, Dianápolis 77300-000, Tocantins, Brazil;
| | - Luzia M. C. Honorio
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Anallyne N. C. O. Cambrussi
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Jailson A. Santos
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Roosevelt D. S. Bezerra
- Federal Institute of Education, Science and Technology of Piauí, Teresina-Central Campus, IFPI, Teresina 64000-040, Brazil;
| | - Josy A. O. Furtini
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Edson C. Silva-Filho
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
| | - Thomas J. Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA;
| | - Anderson O. Lobo
- LIMAV—Interdisciplinary Advanced Materials Laboratory, PPGCM—Materials Science and Engineering Graduate Program, UFPI—Federal University of Piaui, Teresina 64049-550, Brazil; (A.Í.S.M.); (E.G.V.); (L.M.C.H.); (A.N.C.O.C.); (J.A.S.); (J.A.O.F.); (E.C.S.-F.)
- Correspondence: ; Tel.: +55-86-3237-1057
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Caballero Aguilar LM, Kapsa RM, O'Connell CD, McArthur SL, Stoddart PR, Moulton SE. Controlled release from PCL-alginate microspheres via secondary encapsulation using GelMA/HAMA hydrogel scaffolds. SOFT MATTER 2019; 15:3779-3787. [PMID: 30989161 DOI: 10.1039/c8sm02575d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Controlling the release of bioactive agents has important potential applications in tissue engineering. While microspheres have been investigated to manipulate release rates, the majority of these investigations have been based on delivery into aqueous media, whereas the cellular environment in tissue engineering is more typically a hydrogel scaffold. If drug-loaded microspheres are introduced within scaffolds to deliver biologically active substances in situ, it is crucial to understand how the release rate is influenced by interactions between the microspheres and the scaffold. Here, we report the fabrication and characterization of a biodegradable scaffold that contains composite microspheres and is suitable for biological applications. Our approach evaluates the influence on the release profile of a model drug (FITC-dextran sulfate) from alginate and PCL-alginate microspheres within a hydrogel construct forming a secondary encapsulation. Increasing the degree of crosslinking in the secondary encapsulation matrix led to a slower cumulative release from 36% to 15%, from the alginate microspheres, whereas a decrease from 26% to 6% was observed for the PCL-alginate microspheres. These results suggest that the release of bioactive molecules can be fine tuned by independently engineering the properties of the scaffold and microspheres.
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Affiliation(s)
- Lilith M Caballero Aguilar
- ARC Centre of Excellence for Electromaterials Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne, 3122, Australia.
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Wang J, Jansen JA, Yang F. Electrospraying: Possibilities and Challenges of Engineering Carriers for Biomedical Applications-A Mini Review. Front Chem 2019; 7:258. [PMID: 31106194 PMCID: PMC6494963 DOI: 10.3389/fchem.2019.00258] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/01/2019] [Indexed: 12/25/2022] Open
Abstract
Electrospraying, a liquid atomization-based technique, has been used to produce and formulate micro/nanoparticular cargo carriers for various biomedical applications, including drug delivery, biomedical imaging, implant coatings, and tissue engineering. In this mini review, we begin with the main features of electrospraying methods to engineer carriers with various bioactive cargos, including genes, growth factors, and enzymes. In particular, this review focuses on the improvement of traditional electrospraying technology for the fabrication of carriers for living cells and providing a suitable condition for gene transformation. Subsequently, the major applications of the electrosprayed carriers in the biomedical field are highlighted. Finally, we finish with conclusions and future perspectives of electrospraying for high efficiency and safe production.
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Affiliation(s)
| | | | - Fang Yang
- Department of Biomaterials, Radboud University Medical Center, Nijmegen, Netherlands
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Boda SK, Li X, Xie J. Electrospraying an enabling technology for pharmaceutical and biomedical applications: A review. JOURNAL OF AEROSOL SCIENCE 2018; 125:164-181. [PMID: 30662086 PMCID: PMC6333098 DOI: 10.1016/j.jaerosci.2018.04.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Electrospraying (ES) is a robust and versatile technique for the fabrication of micro- and nanoparticulate materials of various compositions, morphologies, shapes, textures and sizes. The physics of ES provides a great degree of flexibility towards the materials design of choice with desired physicochemical and biological properties. Not surprising, this technology has become an important tool for the production of micro- and nanostructured materials, especially in the pharmaceutical and biomedical arena. In this review, a basic introduction to the fundamentals of ES along with a brief description of the experimental parameters that can be manipulated to obtain micro- and nanostructured materials of desired composition, size, and configuration are outlined. A greater focus of this review is to bring to light the broad range of electrosprayed materials and their applications in drug delivery, biomedical imaging, implant coating, tissue engineering, and sensing. Taken together, this review will provide an appreciation of this unique technology, which can be used to fabricate micro- and nanostructured materials with tremendous applications in the pharmaceutical and biomedical fields.
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Affiliation(s)
- Sunil Kumar Boda
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Xiaoran Li
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
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