1
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Tigner T, Scull G, Brown AC, Alge DL. Microparticle Hydrogel Material Properties Emerge from Mixing-Induced Homogenization in a Poly(ethylene glycol) and Dextran Aqueous Two-Phase System. Macromolecules 2023; 56:8518-8528. [PMID: 38357014 PMCID: PMC10863057 DOI: 10.1021/acs.macromol.3c00557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 10/06/2023] [Accepted: 10/16/2023] [Indexed: 02/16/2024]
Abstract
Polymer-polymer aqueous two-phase systems (ATPSs) are attractive for microgel synthesis, but given the complexity of phase separation, predicting microgel material properties from ATPS formulations is not trivial. The objective of this study was to determine how the phase diagram of a poly(ethylene glycol) (PEG) and dextran ATPS is related to the material properties of PEG microgel products. PEG-dextran ATPSs were prepared from four-arm 20 kDa PEG-norbornene and 40 kDa dextran in phosphate buffered saline (PBS), and the phase diagram was constructed. PEG microgels were synthesized from five ATPS formulations using an oligopeptide cross-linker and thiol-norbornene photochemistry. Thermogravimetric analysis (TGA) revealed that the polymer concentration of microgel pellets linearly correlates with the average concentration of PEG in the ATPS rather than the separated phase compositions, as determined from the phase diagram. Atomic force microscopy (AFM) and bulk rheology studies demonstrated that the mechanical properties of microgels rely on both the average concentration of PEG in the ATPS and the ATPS volume ratio as determined from the phase diagram. These findings suggest that PEG-dextran ATPSs undergo homogenization upon mixing, which principally determines the material properties of the microgels upon gelation.
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Affiliation(s)
- Thomas
J. Tigner
- Department
of Biomedical Engineering, Texas A&M
University, College of Engineering, College Station, Texas 77845, United States
| | - Grant Scull
- Joint
Department of Biomedical Engineering, North
Carolina State University and University of North Carolina at Chapel
Hill, College of Engineering, Raleigh, North Carolina 27695, United States
- Comparative
Medicine Institute, North Carolina State
University, Raleigh, North Carolina 27695, United States
| | - Ashley C. Brown
- Joint
Department of Biomedical Engineering, North
Carolina State University and University of North Carolina at Chapel
Hill, College of Engineering, Raleigh, North Carolina 27695, United States
- Comparative
Medicine Institute, North Carolina State
University, Raleigh, North Carolina 27695, United States
| | - Daniel L. Alge
- Department
of Biomedical Engineering, Texas A&M
University, College of Engineering, College Station, Texas 77845, United States
- Department of Material Science and Engineering, Texas A&M University, College of Engineering, College Station, Texas 77845, United States
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2
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Ribezzi D, Gueye M, Florczak S, Dusi F, de Vos D, Manente F, Hierholzer A, Fussenegger M, Caiazzo M, Blunk T, Malda J, Levato R. Shaping Synthetic Multicellular and Complex Multimaterial Tissues via Embedded Extrusion-Volumetric Printing of Microgels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301673. [PMID: 37269532 DOI: 10.1002/adma.202301673] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/24/2023] [Indexed: 06/05/2023]
Abstract
In living tissues, cells express their functions following complex signals from their surrounding microenvironment. Capturing both hierarchical architectures at the micro- and macroscale, and anisotropic cell patterning remains a major challenge in bioprinting, and a bottleneck toward creating physiologically-relevant models. Addressing this limitation, a novel technique is introduced, termed Embedded Extrusion-Volumetric Printing (EmVP), converging extrusion-bioprinting and layer-less, ultra-fast volumetric bioprinting, allowing spatially pattern multiple inks/cell types. Light-responsive microgels are developed for the first time as bioresins (µResins) for light-based volumetric bioprinting, providing a microporous environment permissive for cell homing and self-organization. Tuning the mechanical and optical properties of gelatin-based microparticles enables their use as support bath for suspended extrusion printing, in which features containing high cell densities can be easily introduced. µResins can be sculpted within seconds with tomographic light projections into centimeter-scale, granular hydrogel-based, convoluted constructs. Interstitial microvoids enhanced differentiation of multiple stem/progenitor cells (vascular, mesenchymal, neural), otherwise not possible with conventional bulk hydrogels. As proof-of-concept, EmVP is applied to create complex synthetic biology-inspired intercellular communication models, where adipocyte differentiation is regulated by optogenetic-engineered pancreatic cells. Overall, EmVP offers new avenues for producing regenerative grafts with biological functionality, and for developing engineered living systems and (metabolic) disease models.
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Affiliation(s)
- Davide Ribezzi
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, Utrecht, 3584 CX, The Netherlands
| | - Marième Gueye
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, Utrecht, 3584 CX, The Netherlands
| | - Sammy Florczak
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, Utrecht, 3584 CX, The Netherlands
| | - Franziska Dusi
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080, Würzburg, Germany
| | - Dieuwke de Vos
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, Utrecht, 3584 CX, The Netherlands
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, Utrecht, 3584 CG, The Netherlands
| | - Francesca Manente
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, Utrecht, 3584 CG, The Netherlands
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Via Pansini 5, Naples, 80131, Italy
| | - Andreas Hierholzer
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, Basel, CH-4058, Switzerland
| | - Martin Fussenegger
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, Basel, CH-4058, Switzerland
- Faculty of Science, University of Basel, Mattenstrasse 26, Basel, CH-4058, Switzerland
| | - Massimiliano Caiazzo
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, Utrecht, 3584 CG, The Netherlands
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Via Pansini 5, Naples, 80131, Italy
| | - Torsten Blunk
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080, Würzburg, Germany
| | - Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, Utrecht, 3584 CX, The Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, 3584 CT, The Netherlands
| | - Riccardo Levato
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, Utrecht, 3584 CX, The Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, 3584 CT, The Netherlands
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3
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Shi M, McHugh KJ. Strategies for overcoming protein and peptide instability in biodegradable drug delivery systems. Adv Drug Deliv Rev 2023; 199:114904. [PMID: 37263542 PMCID: PMC10526705 DOI: 10.1016/j.addr.2023.114904] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/18/2023] [Accepted: 05/24/2023] [Indexed: 06/03/2023]
Abstract
The global pharmaceutical market has recently shifted its focus from small molecule drugs to peptide, protein, and nucleic acid drugs, which now comprise a majority of the top-selling pharmaceutical products on the market. Although these biologics often offer improved drug specificity, new mechanisms of action, and/or enhanced efficacy, they also present new challenges, including an increased potential for degradation and a need for frequent administration via more invasive administration routes, which can limit patient access, patient adherence, and ultimately the clinical impact of these drugs. Controlled-release systems have the potential to mitigate these challenges by offering superior control over in vivo drug levels, localizing these drugs to tissues of interest (e.g., tumors), and reducing administration frequency. Unfortunately, adapting controlled-release devices to release biologics has proven difficult due to the poor stability of biologics. In this review, we summarize the current state of controlled-release peptides and proteins, discuss existing techniques used to stabilize these drugs through encapsulation, storage, and in vivo release, and provide perspective on the most promising opportunities for the clinical translation of controlled-release peptides and proteins.
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Affiliation(s)
- Miusi Shi
- Department of Bioengineering, Rice University, Houston, TX 77030, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, PR China
| | - Kevin J McHugh
- Department of Bioengineering, Rice University, Houston, TX 77030, USA; Department of Chemistry, Rice University, Houston, TX 77030, USA.
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4
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Gholizadeh S, Chen X, Yung A, Naderi A, Ghovvati M, Liu Y, Farzad A, Mostafavi A, Dana R, Annabi N. Development and optimization of an ocular hydrogel adhesive patch using definitive screening design (DSD). Biomater Sci 2023; 11:1318-1334. [PMID: 36350113 DOI: 10.1039/d2bm01013e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adhesive hydrogels based on chemically modified photocrosslinkable polymers with specific physicochemical properties are frequently utilized for sealing wounds or incisions. These adhesive hydrogels offer tunable characteristics such as tailorable tissue adhesion, mechanical properties, swelling ratios, and enzymatic degradability. In this study, we developed and optimized a photocrosslinkable adhesive patch, GelPatch, with high burst pressure, minimal swelling, and specific mechanical properties for application as an ocular (sclera and subconjunctival) tissue adhesive. To achieve this, we formulated a series of hydrogel patches composed of different polymers with various levels of methacrylation, molecular weights, and hydrophobic/hydrophilic properties. A computerized multifactorial definitive screening design (DSD) analysis was performed to identify the most prominent components impacting critical response parameters such as adhesion, swelling ratio, elastic modulus, and second order interactions between applied components. These parameters were mathematically processed to generate a predictive model that identifies the linear and non-linear correlations between these factors. In conclusion, an optimized formulation of GelPatch was selected based on two modified polymers: gelatin methacryloyl (GelMA) and glycidyl methacrylated hyaluronic acid (HAGM). The ex vivo results confirmed adhesion and retention of the optimized hydrogel subconjunctivally and on the sclera for up to 4 days. The developed formulation has potential to be used as an ocular sealant for quick repair of laceration type ocular injuries.
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Affiliation(s)
- Shima Gholizadeh
- Chemical and Biomolecular Engineering Department, University of California - Los Angeles, Los Angeles, CA, USA.
| | - Xi Chen
- Chemical and Biomolecular Engineering Department, University of California - Los Angeles, Los Angeles, CA, USA.
| | - Ann Yung
- Schepens Eye Research Institute, Mass Eye and Ear, Harvard Medical School, Department of Ophthalmology, Boston, MA, USA
| | - Amirreza Naderi
- Schepens Eye Research Institute, Mass Eye and Ear, Harvard Medical School, Department of Ophthalmology, Boston, MA, USA
| | - Mahsa Ghovvati
- Chemical and Biomolecular Engineering Department, University of California - Los Angeles, Los Angeles, CA, USA.
| | - Yangcheng Liu
- Chemical and Biomolecular Engineering Department, University of California - Los Angeles, Los Angeles, CA, USA.
| | - Ashkan Farzad
- Sanquin Product Support and Development, Sanquin Plasma Products B.V., Amsterdam, The Netherlands
| | - Azadeh Mostafavi
- Chemical and Biomolecular Engineering Department, University of California - Los Angeles, Los Angeles, CA, USA.
| | - Reza Dana
- Schepens Eye Research Institute, Mass Eye and Ear, Harvard Medical School, Department of Ophthalmology, Boston, MA, USA
| | - Nasim Annabi
- Chemical and Biomolecular Engineering Department, University of California - Los Angeles, Los Angeles, CA, USA.
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA, USA
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5
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Mizukami Y, Yamaguchi T, Shiono M, Takahashi Y, Shimizu K, Konishi S, Takakura Y, Nishikawa M. Drug-preloadable methacrylated gelatin microspheres fabricated using an aqueous two-phase system. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Cheng Q, Chen J, Wan C, Song Y, Huang C. Preparation of Janus Droplets and Hydrogels with Controllable Morphologies by an Aqueous Two-Phase System on the Superamphiphobic Surface. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50434-50443. [PMID: 36300357 DOI: 10.1021/acsami.2c16704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Janus particles, having the property integration of each component, have attracted increasing attention due to their considerable potential in the field of material engineering applications. However, organic solvents or sophisticated equipment during the fabrication processes is generally inevitable. Here, we report a facile route to prepare Janus droplets and hydrogels via aqueous two-phase systems (ATPS). Simply merging two polymers, i.e., polyethylene glycol (PEG) and dextran (DEX), as aqueous droplets on a superamphiphobic surface leads to phase separation, provided that their concentrations exceed the threshold in the mixed aqueous droplets, thus generating a Janus structure. Various morphologies of such Janus droplets can be well controlled by manipulating the locations of these two polymers' concentration on the phase diagram, and the evolution of the mixed droplets are deterministic on the basis of the kinetics of their phase separation and the degree of hydrophobicity of the substrate. Introducing monomers and/or nanoparticles, further, into a certain phase of the ATPS droplet followed by photopolymerizing enables Janus hydrogel particles with diverse functionalities to be obtained. The ease and green techniques with which the Janus balance and curvature between two phases of the Janus droplet can be finely tuned point to new directions in designing Janus particles and hold great promises in biological engineering.
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Affiliation(s)
- Quanyong Cheng
- Key Lab of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, People's Republic of China
| | - Jingyi Chen
- Key Lab of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, People's Republic of China
| | - Chuchu Wan
- Key Lab of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, People's Republic of China
| | - Yuhang Song
- Key Lab of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, People's Republic of China
| | - Caili Huang
- Key Lab of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, People's Republic of China
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7
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Li Y, Kohane DS. Microparticles. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00030-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Daly AC, Riley L, Segura T, Burdick JA. Hydrogel microparticles for biomedical applications. NATURE REVIEWS. MATERIALS 2020; 5:20-43. [PMID: 34123409 PMCID: PMC8191408 DOI: 10.1038/s41578-019-0148-6] [Citation(s) in RCA: 494] [Impact Index Per Article: 123.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Hydrogel microparticles (HMPs) are promising for biomedical applications, ranging from the therapeutic delivery of cells and drugs to the production of scaffolds for tissue repair and bioinks for 3D printing. Biologics (cells and drugs) can be encapsulated into HMPs of predefined shapes and sizes using a variety of fabrication techniques (batch emulsion, microfluidics, lithography, electrohydrodynamic (EHD) spraying and mechanical fragmentation). HMPs can be formulated in suspensions to deliver therapeutics, as aggregates of particles (granular hydrogels) to form microporous scaffolds that promote cell infiltration or embedded within a bulk hydrogel to obtain multiscale behaviours. HMP suspensions and granular hydrogels can be injected for minimally invasive delivery of biologics, and they exhibit modular properties when comprised of mixtures of distinct HMP populations. In this Review, we discuss the fabrication techniques that are available for fabricating HMPs, as well as the multiscale behaviours of HMP systems and their functional properties, highlighting their advantages over traditional bulk hydrogels. Furthermore, we discuss applications of HMPs in the fields of cell delivery, drug delivery, scaffold design and biofabrication.
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Affiliation(s)
- Andrew C Daly
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
- These authors contributed equally: Andrew C. Daly, Lindsay Riley
| | - Lindsay Riley
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- These authors contributed equally: Andrew C. Daly, Lindsay Riley
| | - Tatiana Segura
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Departments of Dermatology and Neurology, Duke University, Durham, NC, USA
| | - Jason A Burdick
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
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9
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Wang Y, Grainger DW. Lyophilized liposome-based parenteral drug development: Reviewing complex product design strategies and current regulatory environments. Adv Drug Deliv Rev 2019; 151-152:56-71. [PMID: 30898571 DOI: 10.1016/j.addr.2019.03.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/13/2019] [Accepted: 03/14/2019] [Indexed: 01/16/2023]
Abstract
Given the successful entry of several liposomal drug products into market, and some with decades of clinical efficacy, liposomal drug delivery systems have proven capabilities to overcome certain limitations of traditional drug delivery, especially for toxic and biologic drugs. This experience has helped promote new liposomal approaches to emerging drug classes and current therapeutic challenges. All approved liposomal dosage forms are parenteral formulations, a pathway demonstrating greatest safety and efficacy to date. Due to the intrinsic instability of aqueous liposomal dispersions, lyophilization is commonly applied as an important solution to improve liposomal drug stability, and facilitate transportation, storage and improve product shelf-life. While lyophilization is a mature pharmaceutical technology, liposome-specific lyophilization platforms must be developed using particular lyophilization experience and strategies. This review provides an overview of liposome formulation-specific lyophilization approaches for parenteral use, excipients used exclusively in liposomal parenteral products, lyophilized liposome formulation design and process development, long-term storage, and current regulatory guidance for liposome drug products. Readers should capture a comprehensive understanding of formulation and process variables and strategies for developing parenterally administered liposomal drugs.
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10
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Liang J, Guo Z, Timmerman A, Grijpma D, Poot A. Enhanced mechanical and cell adhesive properties of photo-crosslinked PEG hydrogels by incorporation of gelatin in the networks. Biomed Mater 2019; 14:024102. [DOI: 10.1088/1748-605x/aaf31b] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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11
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Bouhid de Aguiar I, Schroën K, Meireles M, Bouchoux A. Compressive resistance of granular-scale microgels: From loose to dense packing. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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12
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13
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Iakobson OD, Dobrodumov AV, Saprykina NN, Shevchenko NN. Dextran Nanoparticles Cross-Linked in Aqueous and Aqueous/Alcoholic Media. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Olga D. Iakobson
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr., 31 Saint Petersburg 199004 Russia
| | - Anatoly V. Dobrodumov
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr., 31 Saint Petersburg 199004 Russia
| | - Natalia N. Saprykina
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr., 31 Saint Petersburg 199004 Russia
| | - Natalia N. Shevchenko
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr., 31 Saint Petersburg 199004 Russia
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14
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Wu F, Dai L, Geng L, Zhu H, Jin T. Practically feasible production of sustained-release microspheres of granulocyte-macrophage colony-stimulating factor (rhGM-CSF). J Control Release 2017; 259:195-202. [PMID: 28389408 DOI: 10.1016/j.jconrel.2017.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/25/2017] [Accepted: 04/03/2017] [Indexed: 10/19/2022]
Abstract
Using recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) as a model drug, the present study demonstrated a practically feasible process to produce polymeric microspheres for sustained-release delivery of protein drugs with preserved integrity. This process is featured with pre-loading proteins into polysaccharide fine particles via a self-standing aqueous-aqueous "emulsion", prior to microencapsulation into the microspheres. The protein drug, rhGM-CSF, was partitioned thermodynamically into a dextran dispersed phase of the aqueous-aqueous emulsion, followed by lyophilization and removal of the polyethylene glycol (PEG) continuous phase (using an organic solvent not penetrating into dextran matrix). The harvested dextran particles were then suspended in a dichloromethane solution of polylatic-co-glyclic acids (PLGA) and emulsified in a polyvinyl alcohol (PVA) and NaCl solution of small volume to form embryonic microspheres. The emulsion was then transferred into a NaCl solution of large volume to extract the organic solvent and harden the embryonic microspheres. The obtained rhGM-CSF microspheres showed a satisfied release profile with the day-to-day variation within 9 folds over the multi-weeks long release period. At the same time, the integrity (defined freedom of aggregates measured by SEC-HPLC) and bioactivity (defined by TF-1 cell proliferation) of the proteins were well preserved. The present formulation process ensured good reproducibility and over 89% protein encapsulation efficiency, and practically feasible to adapt to scaled productions.
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Affiliation(s)
- Fei Wu
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 00240, China
| | - Lili Dai
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 00240, China
| | - Lee Geng
- New Jersey Medical School, Rutgers University, 185 S. Orange Ave., Newark 07103, USA
| | - Hua Zhu
- New Jersey Medical School, Rutgers University, 185 S. Orange Ave., Newark 07103, USA
| | - Tuo Jin
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 00240, China.
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15
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Lee B, Jeong D, Joo SW, Choi JM, Lee JY, Cho E, Park S, Jung S. Preparation of Hydroxypropyl Cyclosophoraose/Dextran Microspheres for the Controlled Release of Ciprofloxacin. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.11001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Benel Lee
- Department of Systems Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 South Korea
| | - Daham Jeong
- Department of Systems Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 South Korea
| | - Sang-Woo Joo
- Department of Systems Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 South Korea
| | - Jae Min Choi
- Department of Systems Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 South Korea
| | - Jae Yung Lee
- Department of Biological Science; Mokpo National University; Jeonnam 59626 Korea
| | - Eunae Cho
- Institute for Ubiquitous Information Technology and Applications (UBITA), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 Korea
| | - Seyeon Park
- Department of Applied Chemistry; Dongduk Women's University; Seoul 02748 South Korea
| | - Seunho Jung
- Department of Systems Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 South Korea
- Institute for Ubiquitous Information Technology and Applications (UBITA), Center for Biotechnology Research in UBITA (CBRU); Konkuk University; Seoul 05029 Korea
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16
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Klymenko A, Colombani O, Nicol E, Chassenieux C, Nicolai T. Effect of Self-Assembly on Phase Separation of Di- and Triblock Copolymers Mixed with Homopolymers in Aqueous Solution. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00583] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Klymenko
- LUNAM Université,
Université du Maine, IMMM − UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - O. Colombani
- LUNAM Université,
Université du Maine, IMMM − UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - E. Nicol
- LUNAM Université,
Université du Maine, IMMM − UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - C. Chassenieux
- LUNAM Université,
Université du Maine, IMMM − UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - T. Nicolai
- LUNAM Université,
Université du Maine, IMMM − UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
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17
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McHugh KJ, Guarecuco R, Langer R, Jaklenec A. Single-injection vaccines: Progress, challenges, and opportunities. J Control Release 2015; 219:596-609. [PMID: 26254198 DOI: 10.1016/j.jconrel.2015.07.029] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 07/27/2015] [Accepted: 07/28/2015] [Indexed: 01/01/2023]
Abstract
Currently, vaccination is the most efficient and cost-effective medical treatment for infectious diseases; however, each year 10 million infants remain underimmunized due to current vaccination schedules that require multiple doses to be administered across months or years. These dosing regimens are especially challenging in the developing world where limited healthcare access poses a major logistical barrier to immunization. Over the past four decades, researchers have attempted to overcome this issue by developing single-administration vaccines based on controlled-release antigen delivery systems. These systems can be administered once, but release antigen over an extended period of time to elicit both primary and secondary immune responses resulting in antigen-specific immunological memory. Unfortunately, unlike controlled release systems for drugs, single-administration vaccines have yet to be commercialized due to poor antigen stability and difficulty in obtaining unconventional release kinetics. This review discusses the current state of single-administration vaccination, challenges delaying the development of these vaccines, and potential strategies for overcoming these challenges.
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Affiliation(s)
- Kevin J McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Rohiverth Guarecuco
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States.
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18
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Fransen MF, Cordfunke RA, Sluijter M, van Steenbergen MJ, Drijfhout JW, Ossendorp F, Hennink WE, Melief CJM. Effectiveness of slow-release systems in CD40 agonistic antibody immunotherapy of cancer. Vaccine 2014; 32:1654-60. [PMID: 24508038 DOI: 10.1016/j.vaccine.2014.01.056] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 12/23/2013] [Accepted: 01/24/2014] [Indexed: 10/25/2022]
Abstract
Slow-release delivery has great potential for specifically targeting immune-modulating agents into the tumor-draining area. In prior work we showed that local treatment of slowly delivered anti-CD40 antibody induced robust anti-tumor CD8+ T cell responses without systemic toxicity. We now report on the comparison of two slow-release delivery systems for their use in antibody-based immunotherapy of cancer. Anti-CD40 agonistic antibody delivered locally in mineral oil Montanide ISA 51 or in dextran-based microparticles activated tumor-specific T cell activation. Both slow-release formulations significantly decreased systemic side-effects compared to systemic administration of anti-CD40 antibody. However, dextran-based microparticles caused serious local inflammation associated with unwanted rapid outgrowth of tumors instead of the tumor clearance observed with delivery in Montanide. We therefore conclude that Montanide ISA 51 is to be preferred as a slow-release agent for CD40 agonist immunotherapy of cancer.
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Affiliation(s)
- Marieke F Fransen
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands.
| | - Robert A Cordfunke
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Marjolein Sluijter
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Mies J van Steenbergen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Jan W Drijfhout
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Ferry Ossendorp
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Cornelis J M Melief
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands; ISA Pharmaceuticals, Leiden, The Netherlands
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Celia C, Ferrati S, Bansal S, van de Ven AL, Ruozi B, Zabre E, Hosali S, Paolino D, Sarpietro MG, Fine D, Fresta M, Ferrari M, Grattoni A. Sustained zero-order release of intact ultra-stable drug-loaded liposomes from an implantable nanochannel delivery system. Adv Healthc Mater 2014; 3:230-8. [PMID: 23881575 PMCID: PMC3970317 DOI: 10.1002/adhm.201300188] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Indexed: 11/10/2022]
Abstract
Metronomic chemotherapy supports the idea that long-term, sustained, constant administration of chemotherapeutics, currently not achievable, could be effective against numerous cancers. Particularly appealing are liposomal formulations, used to solubilize hydrophobic therapeutics and minimize side effects, while extending drug circulation time and enabling passive targeting. As liposome alone cannot survive in circulation beyond 48 h, sustaining their constant plasma level for many days is a challenge. To address this, we develop, as a proof of concept, an implantable nanochannel delivery system and ultra-stable PEGylated lapatinib-loaded liposomes, and we demonstrate the release of intact vesicles for over 18 d. Further, we investigate intravasation kinetics of subcutaneously delivered liposomes and verify their biological activity post nanochannel release on BT474 breast cancer cells. The key innovation of this work is the combination of two nanotechnologies to exploit the synergistic effect of liposomes, demonstrated as passive-targeting vectors and nanofluidics to maintain therapeutic constant plasma levels. In principle, this approach could maximize efficacy of metronomic treatments.
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Affiliation(s)
- Christian Celia
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Silvia Ferrati
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Shyam Bansal
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Anne L. van de Ven
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Barbara Ruozi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 183, Modena, 41100 (Italy)
| | - Erika Zabre
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Sharath Hosali
- NanoMedical Systems, Inc., 2706 Montopolis Drive Austin, TX 78741, (USA)
| | - Donatella Paolino
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, V.le “S. Venuta” Germaneto – Catanzaro, 88100 (Italy)
| | - Maria Grazia Sarpietro
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, Catania, 95125 (Italy)
| | - Daniel Fine
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Massimo Fresta
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, V.le “S. Venuta” Germaneto – Catanzaro, 88100 (Italy)
| | - Mauro Ferrari
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA); Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 1006, (USA), Department of Bioengineering, Rice University, 6100 Main Street Houston, TX 77251, (USA), Alliance for NanoHealth, 6670 Bertner Ave., Houston, TX 77030, (USA)
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20
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Van Tomme SR, Hennink WE. Biodegradable dextran hydrogels for protein delivery applications. Expert Rev Med Devices 2014; 4:147-64. [PMID: 17359222 DOI: 10.1586/17434440.4.2.147] [Citation(s) in RCA: 184] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The rapid development of protein-based pharmaceuticals over recent decades has tremendously increased the need for suitable delivery systems, guaranteeing a safe and controlled delivery of proteinacious drugs. Hydrogels offer good opportunities as protein delivery systems or tissue engineering scaffolds owing to an inherent biocompatibility. Their hydrophilic, soft and rubbery nature ensures minimal tissue irritation and a low tendency of cells and proteins to adhere to the hydrogel surface. A variety of both natural and synthetic polymers have been used for the design of hydrogels, in which network formation is established by chemical or physical crosslinking. This review introduces the general features of hydrogels and focuses on dextran hydrogels in particular. Chemically and physically crosslinked systems are described and their potential suitability as protein delivery systems, as well as tissue engineering scaffolds are discussed. Special attention is given to network properties, protein delivery, degradation behavior and biocompatibility.
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Affiliation(s)
- Sophie R Van Tomme
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, PO Box 80082, 3508 TB Utrecht, The Netherlands.
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21
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Wöhl-Bruhn S, Bertz A, Kuntsche J, Menzel H, Bunjes H. Variations in polyethylene glycol brands and their influence on the preparation process of hydrogel microspheres. Eur J Pharm Biopharm 2013; 85:1215-8. [DOI: 10.1016/j.ejpb.2013.02.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 02/26/2013] [Accepted: 02/28/2013] [Indexed: 11/29/2022]
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22
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23
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Wöhl-Bruhn S, Heim E, Schwoerer A, Bertz A, Harling S, Menzel H, Schilling M, Ludwig F, Bunjes H. Fluxgate magnetorelaxometry: A new approach to study the release properties of hydrogel cylinders and microspheres. Int J Pharm 2012; 436:677-84. [DOI: 10.1016/j.ijpharm.2012.07.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2012] [Revised: 07/03/2012] [Accepted: 07/09/2012] [Indexed: 10/28/2022]
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Abstract
Proteins constitute an increasing proportion of the drugs in development. The barriers to their entry into the blood stream and rapid clearance means that they often have to be injected several times a day, affecting patient compliance. This paper reviews the major technologies enabling the development of injectable sustained-release products and formulation strategies to maintain protein integrity and modify release rates. Whilst many injectable sustained-release products are on the market, these are all delivering small molecular weight drugs and peptides. This is due to the manufacturing processes that denature and degrade the proteins upon encapsulation and release into the body. Formulation strategies are discussed and a number of new technologies reviewed that are able to overcome the issues with conventional manufacturing processes. The reliance of many processes on organic solvents has prevented their application to the development of injectable sustained release protein products. The development of entirely solvent free and aqueous methods of manufacture of these products has meant that numerous sustained-release protein products are close to reaching the market.
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25
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Wöhl-Bruhn S, Bertz A, Harling S, Menzel H, Bunjes H. Hydroxyethyl starch-based polymers for the controlled release of biomacromolecules from hydrogel microspheres. Eur J Pharm Biopharm 2012; 81:573-81. [DOI: 10.1016/j.ejpb.2012.04.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 04/18/2012] [Accepted: 04/23/2012] [Indexed: 11/28/2022]
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26
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Abstract
Phase diagram of aqueous two-phase system (ATPS) composed of polyethylene glycol (PEG) and gelatin is of paramount importance for the application of such system in microencapsulation of bioactive compounds. Phase separation of PEG/gelatin aqueous solution was investigated in the present work and the phase diagram of resultant ATPS was reported for the first time. The results show that phase separation will happen if the solid content of PEG/gelatin aqueous solution is higher than a critical value, resulting in an ATPS. The resultant ATPS consists of a low-density phase enriched in PEG and a dense phase enriched in gelatin. The phase compositions of the resultant ATPS were determined accurately using the method developed. The phase diagrams obtained show that higher solid content is required for the phase separation of PEG10,000/gelatin aqueous solution when compared with that of PEG20,000/gelatin one. And PEG is found to be more hydrophilic when compared with gelatin.
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27
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Zheng C, Liu X, Zhu J, Zhao Y. Preparation of cationic biodegradable dextran microspheres loaded with BSA and study on the mechanism of protein loading. Drug Dev Ind Pharm 2012; 38:653-8. [DOI: 10.3109/03639045.2011.589851] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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28
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Censi R, Di Martino P, Vermonden T, Hennink WE. Hydrogels for protein delivery in tissue engineering. J Control Release 2012; 161:680-92. [PMID: 22421425 DOI: 10.1016/j.jconrel.2012.03.002] [Citation(s) in RCA: 235] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 02/29/2012] [Accepted: 03/02/2012] [Indexed: 12/17/2022]
Abstract
Tissue defects caused by diseases or trauma present enormous challenges in regenerative medicine. Recently, a better understanding of the biological processes underlying tissue repair led to the establishment of new approaches in tissue engineering which comprise the combination of biodegradable scaffolds and appropriate cells together with specific environmental cues, such as growth or adhesive factors. These factors (in fact proteins) have to be loaded and sustainably released from the scaffolds in time. This review provides an overview of the various hydrogel technologies that have been proposed to control the release of bioactive molecules of interest for tissue engineering applications. In particular, after a brief introduction on bioactive protein drugs that have remarkable relevance for tissue engineering, this review will discuss their release mechanisms from hydrogels, their encapsulation and immobilization methods and will overview the main classes of hydrogel forming biomaterials used in vitro and in vivo to release them. Finally, an outlook on future directions and a glimpse into the current clinical developments are provided.
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Affiliation(s)
- Roberta Censi
- School of Pharmacy, University of Camerino, via S. Agostino 1, 62032, Camerino (MC), Italy.
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29
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Affiliation(s)
- Tina Vermonden
- Department of Pharmaceutics, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
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31
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Smith AW, Segar CE, Nguyen PK, MacEwan MR, Efimov IR, Elbert DL. Long-term culture of HL-1 cardiomyocytes in modular poly(ethylene glycol) microsphere-based scaffolds crosslinked in the phase-separated state. Acta Biomater 2012; 8:31-40. [PMID: 21920469 DOI: 10.1016/j.actbio.2011.08.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/17/2011] [Accepted: 08/24/2011] [Indexed: 01/16/2023]
Abstract
Poly(ethylene glycol) (PEG) microspheres were assembled around HL-1 cardiomyocytes to produce highly porous modular scaffolds. In this study we took advantage of the immiscibility of PEG and dextran to improve upon our previously described modular scaffold fabrication methods. Phase separating the PEG microspheres in dextran solutions caused them to rapidly deswell and crosslink together, eliminating the need for serum protein-based crosslinking. This also led to a dramatic increase in the stiffness of the scaffolds and greatly improved the handling characteristics. HL-1 cardiomyocytes were present during microsphere crosslinking in the cytocompatible dextran solution, exhibiting high cell viability following scaffold formation. Over the course of 2 weeks a 9-fold expansion in cell number was observed. The cardiac functional markers sarcomeric α-actinin and connexin 43 were expressed at 13 and 24 days after scaffold formation. HL-1 cells were spontaneously depolarizing 38 days after scaffold formation, which was visualized by confocal microscopy using a calcium-sensitive dye. Electrical stimulation resulted in synchronization of activation peaks throughout the scaffolds. These findings demonstrate that PEG microsphere scaffolds fabricated in the presence of dextran can support the long-term three-dimensional culture of cells, suggesting applications in cardiovascular tissue engineering.
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Affiliation(s)
- Amanda W Smith
- Department of Biomedical Engineering and Center for Materials Innovation, Washington University, St. Louis, MO 63130, USA
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32
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33
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Pinholt C, Hartvig RA, Medlicott NJ, Jorgensen L. The importance of interfaces in protein drug delivery – why is protein adsorption of interest in pharmaceutical formulations? Expert Opin Drug Deliv 2011; 8:949-64. [DOI: 10.1517/17425247.2011.577062] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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34
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Ghugare SV, Chiessi E, Fink R, Gerelli Y, Scotti A, Deriu A, Carrot G, Paradossi G. Structural Investigation on Thermoresponsive PVA/Poly(methacrylate-co-N-isopropylacrylamide) Microgels across the Volume Phase Transition. Macromolecules 2011. [DOI: 10.1021/ma200979h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shivkumar V. Ghugare
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, 000133 Roma, Italy
| | - Ester Chiessi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, 000133 Roma, Italy
| | - Rainer Fink
- Physikalische Chemie II and ICMM, Friedrich-Alexander Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
| | - Yuri Gerelli
- Institute Laue Langevin, 6 rue Jules Horowitz, 38000 Grenoble, France
| | - Andrea Scotti
- Dipartimento di Fisica, Università di Parma, Parma, Italy
| | - Antonio Deriu
- Dipartimento di Fisica, Università di Parma, Parma, Italy
| | - Geraldine Carrot
- Laboratoire Léon Brillouin, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Gaio Paradossi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, 000133 Roma, Italy
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King WJ, Toepke MW, Murphy WL. Facile formation of dynamic hydrogel microspheres for triggered growth factor delivery. Acta Biomater 2011; 7:975-85. [PMID: 21029793 DOI: 10.1016/j.actbio.2010.10.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 10/11/2010] [Accepted: 10/22/2010] [Indexed: 11/25/2022]
Abstract
Dynamic hydrogels have emerged as an important class of biomaterials for temporal control over growth factor delivery. In this study we formed dynamic hydrogel microspheres from protein-polymer conjugates using an aqueous two-phase suspension polymerization process. This polymerization process enabled rapid microsphere formation without the use of an organic phase, surfactants, mechanical strain or toxic radical initiators. The microspheres' size distribution was modulated by varying the protein-polymer conformation in the pre-polymer solution. Notably, the protein's ligand-induced, nanometer-scale conformational change translated to maximum hydrogel volume changes of 76±10%. The magnitude of the microspheres' volume change was tuned by varying the crosslinking time and ligand identity. After characterizing the microspheres' dynamic properties, we encapsulated two important therapeutic proteins, vascular endothelial growth factor (VEGF) and bone morphogenetic protein-2 (BMP-2), in the hydrogel microspheres and characterized how the microspheres' dynamic properties controlled their release. Significantly, the aqueous two-phase suspension polymerization process enabled high encapsulation efficiencies (65.8±4.8% and 79.5±3.0% for VEGF and BMP-2, respectively). Also, the microspheres' ligand-induced volume change triggered VEGF and BMP-2 release at specific, predetermined times. There are hundreds of proteins that undergo well-characterized conformational changes that could be processed into hydrogel microspheres via aqueous two-phase suspension polymerizations. Therefore, this approach could be used to form dynamic, growth-factor-releasing hydrogel microspheres that respond to a broad range of specific biochemical ligands.
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36
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Ziemecka I, van Steijn V, Koper GJM, Rosso M, Brizard AM, van Esch JH, Kreutzer MT. Monodisperse hydrogel microspheres by forced droplet formation in aqueous two-phase systems. LAB ON A CHIP 2011; 11:620-4. [PMID: 21125099 DOI: 10.1039/c0lc00375a] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
This paper presents a method to form micron-sized droplets in an aqueous two-phase system (ATPS) and to subsequently polymerize the droplets to produce hydrogel beads. Owing to the low interfacial tension in ATPS, droplets do not easily form spontaneously. We enforce the formation of drops by perturbing an otherwise stable jet that forms at the junction where the two aqueous streams meet. This is done by actuating a piezo-electric bending disc integrated in our device. The influence of forcing amplitude and frequency on jet breakup is described and related to the size of monodisperse droplets with a diameter in the range between 30 and 60 μm. Rapid on-chip polymerization of derivatized dextran inside the droplets created monodisperse hydrogel particles. This work shows how droplet-based microfluidics can be used in all-aqueous, surfactant-free, organic-solvent-free biocompatible two-phase environment.
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Affiliation(s)
- Iwona Ziemecka
- Delft University of Technology, Department of Chemical Engineering, Delft, The Netherlands
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37
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Elbert DL. Liquid-liquid two-phase systems for the production of porous hydrogels and hydrogel microspheres for biomedical applications: A tutorial review. Acta Biomater 2011; 7:31-56. [PMID: 20659596 PMCID: PMC2967636 DOI: 10.1016/j.actbio.2010.07.028] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2010] [Revised: 07/14/2010] [Accepted: 07/21/2010] [Indexed: 01/17/2023]
Abstract
Macroporous hydrogels may have direct applications in regenerative medicine as scaffolds to support tissue formation. Hydrogel microspheres may be used as drug-delivery vehicles or as building blocks to assemble modular scaffolds. A variety of techniques exist to produce macroporous hydrogels and hydrogel microspheres. A subset of these relies on liquid-liquid two-phase systems. Within this subset, vastly different types of polymerization processes are found. In this review, the history, terminology and classification of liquid-liquid two-phase polymerization and crosslinking are described. Instructive examples of hydrogel microsphere and macroporous scaffold formation by precipitation/dispersion, emulsion and suspension polymerizations are used to illustrate the nature of these processes. The role of the kinetics of phase separation in determining the morphology of scaffolds and microspheres is also delineated. Brief descriptions of miniemulsion, microemulsion polymerization and ionotropic gelation are also included.
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Affiliation(s)
- Donald L Elbert
- Department of Biomedical Engineering, Center for Materials Innovation, Washington University in St. Louis, MO 63130, USA.
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38
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De Geest BG, De Koker S, Demeester J, De Smedt SC, Hennink WE. Self-exploding capsules. Polym Chem 2010. [DOI: 10.1039/b9py00287a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Harling S, Schwoerer A, Scheibe K, Daniels R, Menzel H. A new hydrogel drug delivery system based on Hydroxyethylstarch derivatives. J Microencapsul 2009; 27:400-8. [DOI: 10.3109/02652040903367301] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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40
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Schwoerer ADA, Harling S, Scheibe K, Menzel H, Daniels R. Influence of degree of substitution of HES-HEMA on the release of incorporated drug models from corresponding hydrogels. Eur J Pharm Biopharm 2009; 73:351-6. [PMID: 19683570 DOI: 10.1016/j.ejpb.2009.08.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 08/04/2009] [Accepted: 08/10/2009] [Indexed: 10/20/2022]
Abstract
Hydrogel microparticles were produced by a radical polymerization of hydroxyethyl methacrylate-hydroxyethyl starch (HES-HEMA) in an all aqueous two-phase system (ATPS). The microspheres show a monomodal size distribution and have the ability to entrap high amounts of water. The release of proteins or other testing substances from the HES-HEMA hydrogels can be controlled by the choice of the network density of the hydrogel by varying the degree of substitution (DS), the size of the entrapped substance, and by conditions enhancing the degradation of the hydrogel network.
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Affiliation(s)
- Ariane D A Schwoerer
- Technical University of Braunschweig, Institute of Biochemistry and Biotechnology, Braunschweig, Germany
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41
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Guorong S, Zhihai C. A new polymerization method and kinetics for acrylamide: Aqueous two-phase polymerization. J Appl Polym Sci 2009. [DOI: 10.1002/app.29167] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Wu F, Jin T. Polymer-based sustained-release dosage forms for protein drugs, challenges, and recent advances. AAPS PharmSciTech 2008; 9:1218-29. [PMID: 19085110 DOI: 10.1208/s12249-008-9148-3] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Accepted: 09/04/2008] [Indexed: 11/30/2022] Open
Abstract
While the concept of using polymer-based sustained-release delivery systems to maintain therapeutic concentration of protein drugs for extended periods of time has been well accepted for decades, there has not been a single product in this category successfully commercialized to date despite clinical and market demands. To achieve successful systems, technical difficulties ranging from protein denaturing during formulation process and the course of prolonged in vivo release, burst release, and incomplete release, to low encapsulation efficiency and formulation complexity have to be simultaneously resolved. Based on this updated understanding, formulation strategies attempting to address these aspects comprehensively were reported in recent years. This review article (with 134 citations) aims to summarize recent studies addressing the issues above, especially those targeting practical industrial solutions. Formulation strategies representative of three areas, microsphere technology using degradable hydrophobic polymers, microspheres made of water soluble polymers, and hydrophilic in vivo gelling systems will be selected and introduced. To better understand the observations and conclusions from different studies for different systems and proteins, physicochemical basis of the technical challenges and the pros and cons of the corresponding formulation methods will be discussed.
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43
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Oudshoorn M, Penterman R, Rissmann R, Bouwstra J, Broer D, Hennink W. Fabrication of uniformly shaped hydrogel microparticles based on crosslinked hyperbranched polyglycerol by micromolding and photolithographic methods. J Control Release 2008. [DOI: 10.1016/j.jconrel.2008.09.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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44
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Van Tomme SR, Mens A, van Nostrum CF, Hennink WE. Macroscopic Hydrogels by Self-Assembly of Oligolactate-Grafted Dextran Microspheres. Biomacromolecules 2007; 9:158-65. [DOI: 10.1021/bm700931q] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sophie R. Van Tomme
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands, Inorganic Chemistry and Catalysis Group, Department of Chemistry, Faculty of Science, Utrecht University, P.O. Box 80083, 3508 TB Utrecht, The Netherlands
| | - Ad Mens
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands, Inorganic Chemistry and Catalysis Group, Department of Chemistry, Faculty of Science, Utrecht University, P.O. Box 80083, 3508 TB Utrecht, The Netherlands
| | - Cornelus F. van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands, Inorganic Chemistry and Catalysis Group, Department of Chemistry, Faculty of Science, Utrecht University, P.O. Box 80083, 3508 TB Utrecht, The Netherlands
| | - Wim E. Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands, Inorganic Chemistry and Catalysis Group, Department of Chemistry, Faculty of Science, Utrecht University, P.O. Box 80083, 3508 TB Utrecht, The Netherlands
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Oudshoorn MHM, Penterman R, Rissmann R, Bouwstra JA, Broer DJ, Hennink WE. Preparation and characterization of structured hydrogel microparticles based on cross-linked hyperbranched polyglycerol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:11819-11825. [PMID: 17927225 DOI: 10.1021/la701910d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The aim of this work was to obtain well-defined HyPG-MA (methacrylated hyperbranched polyglycerol) microparticles with uniform sizes. Therefore, three different preparation methods were evaluated. First, we assessed a micromolding technique using rigid SU-8 (a photoresist based on epoxies) grids. Independent of the surface treatment of the SU-8 grid or the type of polymer used, approximately 50% of the microgels remained attached to the SU-8 grid or broke into smaller particles during the release process in which drying of the gels was followed by a sonication process. Although 90% methacrylate conversion could be obtained, this method has some additional drawbacks as the obtained dried microgels did not rehydrate completely after the drying step. Second, a soft micromolding technique was evaluated using elastomeric PDMS (poly(dimethyl siloxane)) grids. The use of these flexible grids resulted in a high yield (80-90% yield; >90% methacrylate conversion) of microgels with a well-defined size and shape (squares 100 microm x 100 microm x 50 microm or hexagons with Ø 30 microm and a thickness of 20 microm) without the occurrence of water evaporation. However, a number of particles showed a less-defined shape as not all grids could be filled well. The microgels showed restricted swelling, implying that these gels are dimensionally stable. Third, an alternative method referred to as photolithography was evaluated. This method was suitable to tailor accurately the size and shape of HyPG-MA microgels and additionally gained 100% yield. Well-defined HyPG-MA microgels in the size range of 200-1400 microm (thickness of 6, 20, or 50 microm), with a methacrylate conversion of >90%, could easily be prepared by adding an inhibitor (e.g., 1% (w/v) of vitamin C) to the polymer solution to inhibit dark polymerization. Microgels in the size range of 30-100 microm (>90% conversion) could only be obtained when applying the photomask in direct contact with the polymer solution and using a higher (i.e., 2% (w/v)) concentration of vitamin C. Additionally, the microgels showed limited swelling, indicating that rather dimensionally stable particles were obtained. In conclusion, this paper shows that photolithography and soft micromolding, as compared to rigid micromolding, are the most appropriate techniques to fabricate structured HyPG-MA microgels with a tailorable and well-defined size and shape. These microgels have great potential in tissue engineering and drug delivery applications.
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Affiliation(s)
- Marion H M Oudshoorn
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Sorbonnelaan 16, P.O. Box 80082, 3508 TB Utrecht, The Netherlands
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Vlugt-Wensink KDF, Meijer YJ, van Steenbergen MJ, Verrijk R, Jiskoot W, Crommelin DJA, Hennink WE. Effect of excipients on the encapsulation efficiency and release of human growth hormone from dextran microspheres. Eur J Pharm Biopharm 2007; 67:589-96. [PMID: 17540550 DOI: 10.1016/j.ejpb.2007.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2006] [Revised: 04/09/2007] [Accepted: 04/12/2007] [Indexed: 10/23/2022]
Abstract
The possibility was investigated to modulate the encapsulation efficiency and release of human growth hormone (hGH) from hydroxyl ethyl methacrylated dextran (dex-HEMA) hydrogel microspheres by using excipients. Microspheres were prepared by polymerization of dex-HEMA in an aqueous two-phase system of this polymer and PEG with or without excipients (Tween 80, pluronic F68, sucrose, NaCl, urea or methionine). High hGH encapsulation efficiencies (50-70%) were obtained for microspheres prepared without excipients and with Tween 80, NaCl or methionine. Substantially lower encapsulation efficiencies (27% and 19%, respectively) were obtained for microspheres prepared in the presence of sucrose and urea, which was attributed to the more favoured partitioning of hGH over the PEG-phase due to higher hydrophobicity of the (partly) denatured hGH. Likely, differences in precipitate size of the encapsulated hGH resulted in different release profiles between microspheres prepared without excipients (biphasic release: 2 days delay time followed by 6 days release) and the release profile for microspheres prepared with Tween 80, pluronic F68, sucrose, NaCl and urea (release over a period of 6-8 days (without a delay time)). Microspheres prepared with methionine showed a concentration-dependent delay time varying from 0 to 2 days followed by almost zero-order release over 6 days, attributed to the effect of methionine on the polymerization of dex-HEMA. Especially, Tween 80 and methionine are attractive excipients since hGH was encapsulated in high yield (60-70%) and the protein was released from the microspheres mainly in its monomeric form without a delay time and with an almost zero-order release over 6-8 days.
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Preclinical and clinical in vitro in vivo correlation of an hGH dextran microsphere formulation. Pharm Res 2007; 24:2239-48. [PMID: 17929148 PMCID: PMC2063566 DOI: 10.1007/s11095-007-9433-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2007] [Accepted: 08/06/2007] [Indexed: 11/16/2022]
Abstract
Purpose To investigate the in vitro in vivo correlation of a sustained release formulation for human growth hormone (hGH) based on hydroxyethyl methacrylated dextran (dex-HEMA) microspheres in Pit-1 deficient Snell dwarf mice and in healthy human volunteers. Materials and Methods A hGH-loaded microsphere formulation was developed and tested in Snell dwarf mice (pharmacodynamic study) and in healthy human volunteers (pharmacokinetic study). Results Single subcutaneous administration of the microspheres in mice resulted in a good correlation between hGH released in vitro and in vivo effects for the hGH-loaded microsphere formulation similar to daily injected hGH indicating a retained bioactivity. Testing the microspheres in healthy volunteers showed an increase (over 7–8 days) in hGH serum concentrations (peak concentrations: 1–2.5 ng/ml). A good in vitro in vivo correlation was obtained between the measured and calculated (from in vitro release data) hGH serum concentrations. Moreover, an increased serum concentration of biomarkers (insulin-like growth factor-I (IGF-I), IGF binding protein-3 (IGFBP-3) was found again indicating that bioactive hGH was released from the microspheres. Conclusions Good in vitro in vivo correlations were obtained for hGH-loaded dex-HEMA microspheres, which is an important advantage in predicting the effect of the controlled drug delivery product in a clinical situations.
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Yuan W, Wu F, Geng Y, Xu S, Jin T. Preparation of dextran glassy particles through freezing-induced phase separation. Int J Pharm 2007; 339:76-83. [PMID: 17391880 DOI: 10.1016/j.ijpharm.2007.02.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 01/18/2007] [Accepted: 02/21/2007] [Indexed: 11/21/2022]
Abstract
This report demonstrates a novel method to prepare fine polysaccharide glassy particles of uniform sizes under a condition without water/oil and water/air interfacial tension and cross-linking reagents. When a co-solution of dextran and polyethylene glycol (PEG) was frozen gradually, phase separation occurred during which dextran formed the dispersed phase and PEG remained in the continuous part. Fine dextran glassy particles were harvested after lyophilizing this frozen sample, followed by re-dissolving the continuous phase (PEG) in dichloromethane or acetonitrile. Desired mean particle diameter can be achieved within the range between 200 nm and 10 microm by selecting molecular weights of PEG and dextran, concentration of the co-solution, and PEG/dextran ratio. Increase in molecular weights, concentration or PEG/dextran ratio resulted in increase in particle sizes, and the vice versa. The dextran particles prepared as above showed smooth surface under an electron microscope, a phase transition temperature on thermogram, and sank in carbon tetrachloride (density = 1.592 g/ml), indicating that the particle matrix is dense and glassy. This particulate system and its forming process may have wide applications in formulating variety of pharmaceutical dosage forms and medical devices containing delicate biotech therapeutics.
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Affiliation(s)
- Weien Yuan
- Shanghai Jiaotong University School of Pharmacy, 800 Dongchuan Road, Shanghai 200240, China
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Preparing and evaluating delivery systems for proteins. Eur J Pharm Sci 2006; 29:174-82. [DOI: 10.1016/j.ejps.2006.05.008] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2006] [Accepted: 05/15/2006] [Indexed: 11/22/2022]
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Schillemans JP, Flesch FM, Hennink WE, van Nostrum CF. Synthesis of Bilayer-Coated Nanogels by Selective Cross-Linking of Monomers inside Liposomes. Macromolecules 2006. [DOI: 10.1021/ma060727t] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joris P. Schillemans
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80.082, 3508 TB Utrecht, The Netherlands
| | - Frits M. Flesch
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80.082, 3508 TB Utrecht, The Netherlands
| | - Wim E. Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80.082, 3508 TB Utrecht, The Netherlands
| | - Cornelus F. van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80.082, 3508 TB Utrecht, The Netherlands
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