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Co-delivery of saxagliptin and dapagliflozin by electrosprayed trilayer poly (D, -lactide-co-glycolide) nanoparticles for controlled drug delivery. Int J Pharm 2022; 628:122279. [DOI: 10.1016/j.ijpharm.2022.122279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 10/06/2022] [Indexed: 11/18/2022]
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2
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Ivanova TA, Golubeva EN. Aliphatic Polyesters for Biomedical Purposes: Design and Kinetic Regularities of Degradation in vitro. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122030162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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PLGA/PLA-Based Long-Acting Injectable Depot Microspheres in Clinical Use: Production and Characterization Overview for Protein/Peptide Delivery. Int J Mol Sci 2021; 22:ijms22168884. [PMID: 34445587 PMCID: PMC8396256 DOI: 10.3390/ijms22168884] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 12/20/2022] Open
Abstract
Over the past few decades, long acting injectable (LAI) depots of polylactide-co-glycolide (PLGA) or polylactic acid (PLA) based microspheres have been developed for controlled drug delivery to reduce dosing frequency and to improve the therapeutic effects. Biopharmaceuticals such as proteins and peptides are encapsulated in the microspheres to increase their bioavailability and provide a long release period (days or months) with constant drug plasma concentration. The biodegradable and biocompatible properties of PLGA/PLA polymers, including but not limited to molecular weight, end group, lactide to glycolide ratio, and minor manufacturing changes, could greatly affect the quality attributes of microsphere formulations such as release profile, size, encapsulation efficiency, and bioactivity of biopharmaceuticals. Besides, the encapsulated proteins/peptides are susceptible to harsh processing conditions associated with microsphere fabrication methods, including exposure to organic solvent, shear stress, and temperature fluctuations. The protein/peptide containing LAI microspheres in clinical use is typically prepared by double emulsion, coacervation, and spray drying techniques. The purpose of this review is to provide an overview of the formulation attributes and conventional manufacturing techniques of LAI microspheres that are currently in clinical use for protein/peptides. Furthermore, the physicochemical characteristics of the microsphere formulations are deliberated.
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Arbeiter D, Reske T, Teske M, Bajer D, Senz V, Schmitz KP, Grabow N, Oschatz S. Influence of Drug Incorporation on the Physico-Chemical Properties of Poly(l-Lactide) Implant Coating Matrices-A Systematic Study. Polymers (Basel) 2021; 13:292. [PMID: 33477626 PMCID: PMC7831498 DOI: 10.3390/polym13020292] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 12/15/2022] Open
Abstract
Local drug delivery has become indispensable in biomedical engineering with stents being ideal carrier platforms. While local drug release is superior to systemic administration in many fields, the incorporation of drugs into polymers may influence the physico-chemical properties of said matrix. This is of particular relevance as minimally invasive implantation is frequently accompanied by mechanical stresses on the implant and coating. Thus, drug incorporation into polymers may result in a susceptibility to potentially life-threatening implant failure. We investigated spray-coated poly-l-lactide (PLLA)/drug blends using thermal measurements (DSC) and tensile tests to determine the influence of selected drugs, namely sirolimus, paclitaxel, dexamethasone, and cyclosporine A, on the physico-chemical properties of the polymer. For all drugs and PLLA/drug ratios, an increase in tensile strength was observed. As for sirolimus and dexamethasone, PLLA/drug mixed phase systems were identified by shifted drug melting peaks at 200 °C and 240 °C, respectively, whereas paclitaxel and dexamethasone led to cold crystallization. Cyclosporine A did not affect matrix thermal properties. Altogether, our data provide a contribution towards an understanding of the complex interaction between PLLA and different drugs. Our results hold implications regarding the necessity of target-oriented thermal treatment to ensure the shelf life and performance of stent coatings.
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Affiliation(s)
- Daniela Arbeiter
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
| | - Thomas Reske
- Institute for Implant Technology and Biomaterials e.V., Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany;
| | - Michael Teske
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
| | - Dalibor Bajer
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
| | - Volkmar Senz
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
| | - Klaus-Peter Schmitz
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
- Institute for Implant Technology and Biomaterials e.V., Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany;
| | - Niels Grabow
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
| | - Stefan Oschatz
- Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Straße 4, 18119 Rostock, Germany; (M.T.); (D.B.); (V.S.); (K.-P.S.); (N.G.); (S.O.)
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Zhang Y, Zhang R, Illangakoon UE, Harker AH, Thrasivoulou C, Parhizkar M, Edirisinghe M, Luo CJ. Copolymer Composition and Nanoparticle Configuration Enhance in vitro Drug Release Behavior of Poorly Water-soluble Progesterone for Oral Formulations. Int J Nanomedicine 2020; 15:5389-5403. [PMID: 32801695 PMCID: PMC7398683 DOI: 10.2147/ijn.s257353] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/30/2020] [Indexed: 02/02/2023] Open
Abstract
HYPOTHESIS Developing oral formulations to enable effective release of poorly water-soluble drugs like progesterone is a major challenge in pharmaceutics. Coaxial electrospray can generate drug-loaded nanoparticles of strategic compositions and configurations to enhance physiological dissolution and bioavailability of poorly water-soluble drug progesterone. EXPERIMENTS Six formulations comprising nanoparticles encapsulating progesterone in different poly(lactide-co-glycolide) (PLGA) matrix configurations and compositions were fabricated and characterized in terms of morphology, molecular crystallinity, drug encapsulation efficiency and release behavior. FINDINGS A protocol of fabrication conditions to achieve 100% drug encapsulation efficiency in nanoparticles was developed. Scanning electron microscopy shows smooth and spherical morphology of 472.1±54.8 to 588.0±92.1 nm in diameter. Multiphoton Airyscan super-resolution confocal microscopy revealed core-shell nanoparticle configuration. Fourier transform infrared spectroscopy confirmed presence of PLGA and progesterone in all formulations. Diffractometry indicated amorphous state of the encapsulated drug. UV-vis spectroscopy showed drug release increased with hydrophilic copolymer glycolide ratio while core-shell formulations with progesterone co-dissolved in PLGA core exhibited enhanced release over five hours at 79.9±1.4% and 70.7±3.5% for LA:GA 50:50 and 75:25 in comparison with pure progesterone without polymer matrix in the core at 67.0±1.7% and 57.5±2.8%, respectively. Computational modeling showed good agreement with the experimental drug release behavior in vitro.
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Affiliation(s)
- Yue Zhang
- Department of Mechanical Engineering, University College London, LondonWC1E 7JE, UK
| | - Rui Zhang
- Department of Mechanical Engineering, University College London, LondonWC1E 7JE, UK
| | - Upulitha Eranka Illangakoon
- Department of Mechanical Engineering, University College London, LondonWC1E 7JE, UK
- UCL School of Pharmacy, University College London, LondonWC1N 1AX, UK
| | - Anthony Henry Harker
- Department of Physics & Astronomy, University College London, LondonWC1E 6BT, UK
| | - Christopher Thrasivoulou
- Cell & Developmental Biology, Division of Biosciences, University College London, LondonWC1E 6BT, UK
| | - Maryam Parhizkar
- Department of Mechanical Engineering, University College London, LondonWC1E 7JE, UK
- UCL School of Pharmacy, University College London, LondonWC1N 1AX, UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, LondonWC1E 7JE, UK
| | - C J Luo
- Department of Mechanical Engineering, University College London, LondonWC1E 7JE, UK
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Li F, Li X, He R, Cheng J, Ni Z, Zhao G. Preparation and evaluation of poly(D, L-lactic acid)/poly(L-lactide-co-ε-caprolactone) blends for tunable sirolimus release. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fang Y, Zhang N, Li Q, Chen J, Xiong S, Pan W. Characterizing the release mechanism of donepezil-loaded PLGA microspheres in vitro and in vivo. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.03.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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8
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Takasaki M, Nakashima K, Tsuruda R, Tokuda T, Tanaka K, Kobayashi H. Drug Release Behavior of a Drug-Loaded Polylactide Nanofiber Web Prepared via Laser-Electrospinning. J MACROMOL SCI B 2019. [DOI: 10.1080/00222348.2019.1615193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Midori Takasaki
- Department of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Keita Nakashima
- Department of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Ryo Tsuruda
- Department of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Tomoki Tokuda
- Department of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Katsufumi Tanaka
- Department of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Haruki Kobayashi
- Department of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
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Ding D, Zhu Q. Recent advances of PLGA micro/nanoparticles for the delivery of biomacromolecular therapeutics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:1041-1060. [DOI: 10.1016/j.msec.2017.12.036] [Citation(s) in RCA: 162] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/18/2017] [Accepted: 12/30/2017] [Indexed: 01/06/2023]
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10
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Ritsema JAS, Herschberg EMA, Borgos SE, Løvmo C, Schmid R, Te Welscher YM, Storm G, van Nostrum CF. Relationship between polarities of antibiotic and polymer matrix on nanoparticle formulations based on aliphatic polyesters. Int J Pharm 2017; 548:730-739. [PMID: 29133206 DOI: 10.1016/j.ijpharm.2017.11.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 12/21/2022]
Abstract
In the field of nanomedicine, nanoparticles are developed to target antibiotics to sites of bacterial infection thus enabling adequate drug exposure and decrease development of resistant bacteria. In the present study, we investigated the encapsulation of two antibiotics with different polarity into different PEGylated polymeric nanoparticles based on aliphatic polyesters, to obtain a better understanding of critical factors determining encapsulation and release. The nanoparticles were prepared from diblock copolymers comprising of a poly(ethylene glycol) block attached to an aliphatic polyester block of varying polarity: poly(lactic-co-glycolic acid) (mPEG-PLGA), poly(lactic-co-hydroxymethyl glycolic acid) (mPEG-PLHMGA) and poly(lactic-co-benzyloxymethyl glycolic acid) (mPEG-PLBMGA). Hydrophobic bedaquiline and hydrophilic vancomycin were encapsulated via single and double-emulsion solvent evaporation techniques, respectively. Encapsulation, degradation and release studies at physiological simulating conditions were performed. Drug polarity and preparation techniques influenced encapsulation efficiency into polymer nanoparticles, giving almost complete encapsulation of bedaquiline and approx. 30% for vancomycin independent of the polymer type. The nonpolar bedaquiline showed a predominantly diffusion-controlled release independent of polymer composition. However, polar vancomycin was released by a combination of diffusion and polymer degradation, which was significantly affected by polymer composition, the most hydrophilic polymer displaying the fastest release.
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Affiliation(s)
- J A S Ritsema
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands.
| | - E M A Herschberg
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - S E Borgos
- Department of Biotechnology and Nanomedicine, SINTEF Materials and Chemistry, Trondheim, Norway
| | - C Løvmo
- Department of Biotechnology and Nanomedicine, SINTEF Materials and Chemistry, Trondheim, Norway
| | - R Schmid
- Department of Biotechnology and Nanomedicine, SINTEF Materials and Chemistry, Trondheim, Norway
| | - Y M Te Welscher
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - G Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - C F van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands.
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11
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Blakney AK, Simonovsky FI, Suydam IT, Ratner BD, Woodrow KA. Rapidly Biodegrading PLGA-Polyurethane Fibers for Sustained Release of Physicochemically Diverse Drugs. ACS Biomater Sci Eng 2016; 2:1595-1607. [PMID: 28989956 PMCID: PMC5630182 DOI: 10.1021/acsbiomaterials.6b00346] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Sustained release of physicochemically diverse drugs from electrospun fibers remains a challenge and precludes the use of fibers in many medical applications. Here, we synthesize a new class of polyurethanes with poly(lactic-co-glycolic acid) (PLGA) moieties that degrade faster than polyurethanes based on polycaprolactone. The new polymers, with varying hard to soft segment ratios and fluorobenzene pendant group content, were electrospun into nanofibers and loaded with four physicochemically diverse small molecule drugs. Polymers were characterized using GPC, XPS, and 19F NMR. The size and morphology of electrospun fibers were visualized using SEM, and drug/polymer compatibility and drug crystallinity were evaluated using DSC. We measured in vitro drug release, polymer degradation and cell-culture cytotoxicity of biodegradation products. We show that these newly synthesized PLGA-based polyurethanes degrade up to 65-80% within 4 weeks and are cytocompatible in vitro. The drug-loaded electrospun fibers were amorphous solid dispersions. We found that increasing the hard to soft segment ratio of the polymer enhances the sustained release of positively charged drugs, whereas increasing the fluorobenzene pendant content caused more rapid release of some drugs. In summary, increasing the hard segment or fluorobenzene pendant content of segmented polyurethanes containing PLGA moieties allows for modulation of physicochemically diverse drug release from electrospun fibers while maintaining a biologically relevant biodegradation rate.
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Affiliation(s)
- Anna K. Blakney
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, Washington 98195, United States
| | - Felix I. Simonovsky
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, Washington 98195, United States
| | - Ian T. Suydam
- Department of Chemistry, Seattle University, 901 12th Ave., Seattle, Washington 98122, United States
| | - Buddy D. Ratner
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, Washington 98195, United States
- Department of Chemical Engineering, University of Washington, 3720 15th Ave NE, Seattle, Washington 98195, United States
| | - Kim A. Woodrow
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, Washington 98195, United States
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12
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Ji Y, Lesniak AK, Prudic A, Paus R, Sadowski G. Drug Release Kinetics and Mechanism from PLGA Formulations. AIChE J 2016. [DOI: 10.1002/aic.15282] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yuanhui Ji
- TU Dortmund, Dept. of Biochemical and Chemical Engineering, Laboratory of Thermodynamics; Emil-Figge-Str. 70 D-44227 Dortmund Germany
| | - Anna Katharina Lesniak
- TU Dortmund, Dept. of Biochemical and Chemical Engineering, Laboratory of Thermodynamics; Emil-Figge-Str. 70 D-44227 Dortmund Germany
| | - Anke Prudic
- TU Dortmund, Dept. of Biochemical and Chemical Engineering, Laboratory of Thermodynamics; Emil-Figge-Str. 70 D-44227 Dortmund Germany
| | - Raphael Paus
- TU Dortmund, Dept. of Biochemical and Chemical Engineering, Laboratory of Thermodynamics; Emil-Figge-Str. 70 D-44227 Dortmund Germany
| | - Gabriele Sadowski
- TU Dortmund, Dept. of Biochemical and Chemical Engineering, Laboratory of Thermodynamics; Emil-Figge-Str. 70 D-44227 Dortmund Germany
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13
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wu L, Qiu L. Reverse micelles-in-microspheres with sustained release of water-soluble combretastatin A4 phosphate for S180 tumor treatment. J Mater Chem B 2016; 4:760-767. [DOI: 10.1039/c5tb02468d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CA4P-loaded microspheres (CA4P-MS) composed of PELA reverse micelles (CA4P-RM) and PLGA with a sea-island structure were prepared. This unique type of construction can greatly improve the encapsulation efficiency of water-soluble CA4P and provide sustained drug release and action for cancer therapy.
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Affiliation(s)
- Liping wu
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- China
| | - Liyan Qiu
- Ministry of Education (MOE) Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou
- China
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14
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Izadifar M, Haddadi A, Chen X, Kelly ME. Rate-programming of nano-particulate delivery systems for smart bioactive scaffolds in tissue engineering. NANOTECHNOLOGY 2015; 26:012001. [PMID: 25474543 DOI: 10.1088/0957-4484/26/1/012001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Development of smart bioactive scaffolds is of importance in tissue engineering, where cell proliferation, differentiation and migration within scaffolds can be regulated by the interactions between cells and scaffold through the use of growth factors (GFs) and extra cellular matrix peptides. One challenge in this area is to spatiotemporally control the dose, sequence and profile of release of GFs so as to regulate cellular fates during tissue regeneration. This challenge would be addressed by rate-programming of nano-particulate delivery systems, where the release of GFs via polymeric nanoparticles is controlled by means of the methods of, such as externally-controlled and physicochemically/architecturally-modulated so as to mimic the profile of physiological GFs. Identifying and understanding such factors as the desired release profiles, mechanisms of release, physicochemical characteristics of polymeric nanoparticles, and externally-triggering stimuli are essential for designing and optimizing such delivery systems. This review surveys the recent studies on the desired release profiles of GFs in various tissue engineering applications, elucidates the major release mechanisms and critical factors affecting release profiles, and overviews the role played by the mathematical models for optimizing nano-particulate delivery systems. Potentials of stimuli responsive nanoparticles for spatiotemporal control of GF release are also presented, along with the recent advances in strategies for spatiotemporal control of GF delivery within tissue engineered scaffolds. The recommendation for the future studies to overcome challenges for developing sophisticated particulate delivery systems in tissue engineering is discussed prior to the presentation of conclusions drawn from this paper.
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Affiliation(s)
- Mohammad Izadifar
- Division of Biomedical Engineering, College of Engineering, 57 Campus Drive, University of Saskatchewan, Saskatoon, SK, S7N5A9, Canada
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15
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Tabatabaei Mirakabad FS, Nejati-Koshki K, Akbarzadeh A, Yamchi MR, Milani M, Zarghami N, Zeighamian V, Rahimzadeh A, Alimohammadi S, Hanifehpour Y, Joo SW. PLGA-Based Nanoparticles as Cancer Drug Delivery Systems. Asian Pac J Cancer Prev 2014; 15:517-35. [DOI: 10.7314/apjcp.2014.15.2.517] [Citation(s) in RCA: 256] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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16
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Rattanakit P, Moulton SE, Santiago KS, Liawruangrath S, Wallace GG. Extrusion printed polymer structures: a facile and versatile approach to tailored drug delivery platforms. Int J Pharm 2011; 422:254-63. [PMID: 22101281 DOI: 10.1016/j.ijpharm.2011.11.007] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 11/01/2011] [Accepted: 11/03/2011] [Indexed: 12/31/2022]
Abstract
A novel extrusion printing system was used to create drug delivery structures wherein dexamethasone-21-phosphate disodium salt (Dex21P) was encapsulated within a biodegradable polymer (PLGA) and water soluble poly(vinyl alcohol) (PVA) configurations. The ability to control the drug release profile through the spatial distribution of drug within the printed 3-dimensional structures is demonstrated. The fabricated configurations were characterised by optical microscopy and SEM to evaluate surface morphology. The results clearly demonstrate the successful encapsulation of dexamethasone within a laminated PLGA:PVA structure. The resulting drug release profiles from the structures show a two stage release profile with distinctly different release rates and minimal initial burst release observed. Dexamethasone release was monitored over a 4-month period. This approach clearly demonstrates that the extrusion printing technique provides a facile and versatile approach to fabrication of novel drug delivery platforms.
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Affiliation(s)
- Parawee Rattanakit
- Department of Chemistry and Centre for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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17
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The mechanisms of drug release in poly(lactic-co-glycolic acid)-based drug delivery systems—A review. Int J Pharm 2011; 415:34-52. [DOI: 10.1016/j.ijpharm.2011.05.049] [Citation(s) in RCA: 722] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 05/08/2011] [Accepted: 05/09/2011] [Indexed: 01/07/2023]
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18
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Lei L, Liu X, Shen YY, Liu JY, Tang MF, Wang ZM, Guo SR, Cheng L. Zero-order release of 5-fluorouracil from PCL-based films featuring trilayered structures for stent application. Eur J Pharm Biopharm 2011; 78:49-57. [DOI: 10.1016/j.ejpb.2011.01.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 12/10/2010] [Accepted: 01/11/2011] [Indexed: 11/15/2022]
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19
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Fredenberg S, Jönsson M, Laakso T, Wahlgren M, Reslow M, Axelsson A. Development of mass transport resistance in poly(lactide-co-glycolide) films and particles – A mechanistic study. Int J Pharm 2011; 409:194-202. [DOI: 10.1016/j.ijpharm.2011.02.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 02/26/2011] [Accepted: 02/28/2011] [Indexed: 11/15/2022]
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20
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Fredenberg S, Wahlgren M, Reslow M, Axelsson A. Pore formation and pore closure in poly(D,L-lactide-co-glycolide) films. J Control Release 2011; 150:142-9. [DOI: 10.1016/j.jconrel.2010.11.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 11/05/2010] [Accepted: 11/15/2010] [Indexed: 10/18/2022]
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