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De Giorgi A, Bellussi FM, Parlani S, Lucisano A, Silvestri E, Aryal S, Park S, Key J, Fasano M. Diffusion of curcumin in PLGA-based carriers for drug delivery: a molecular dynamics study. J Mol Model 2024; 30:219. [PMID: 38896158 PMCID: PMC11186890 DOI: 10.1007/s00894-024-06023-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 06/11/2024] [Indexed: 06/21/2024]
Abstract
CONTEXT The rapid growth and diversification of drug delivery systems have been significantly supported by advancements in micro- and nano-technologies, alongside the adoption of biodegradable polymeric materials like poly(lactic-co-glycolic acid) (PLGA) as microcarriers. These developments aim to reduce toxicity and enhance target specificity in drug delivery. The use of in silico methods, particularly molecular dynamics (MD) simulations, has emerged as a pivotal tool for predicting the dynamics of species within these systems. This approach aids in investigating drug delivery mechanisms, thereby reducing the costs associated with design and prototyping. In this study, we focus on elucidating the diffusion mechanisms in curcumin-loaded PLGA particles, which are critical for optimizing drug release and efficacy in therapeutic applications. METHODS We utilized MD to explore the diffusion behavior of curcumin in PLGA drug delivery systems. The simulations, executed with GROMACS, modeled curcumin molecules in a representative volume element of PLGA chains and water, referencing molecular structures from the Protein Data Bank and employing the CHARMM force field. We generated PLGA chains of varying lengths using the Polymer Modeler tool and arranged them in a bulk-like environment with Packmol. The simulation protocol included steps for energy minimization, T and p equilibration, and calculation of the isotropic diffusion coefficient from the mean square displacement. The Taguchi method was applied to assess the effects of hydration level, PLGA chain length, and density on diffusion. RESULTS Our results provide insight into the influence of PLGA chain length, hydration level, and polymer density on the diffusion coefficient of curcumin, offering a mechanistic understanding for the design of efficient drug delivery systems. The sensitivity analysis obtained through the Taguchi method identified hydration level and PLGA density as the most significant input parameters affecting curcumin diffusion, while the effect of PLGA chain length was negligible within the simulated range. We provided a regression equation capable to accurately fit MD results. The regression equation suggests that increases in hydration level and PLGA density result in a decrease in the diffusion coefficient.
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Affiliation(s)
- Alessandro De Giorgi
- Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy
| | | | - Stefano Parlani
- Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy
| | - Andrea Lucisano
- Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy
| | - Emanuele Silvestri
- Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy
| | - Susmita Aryal
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Gangwon State, Republic of Korea
| | - Sanghyo Park
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Gangwon State, Republic of Korea
| | - Jaehong Key
- Department of Biomedical Engineering, Yonsei University, Wonju, 26493, Gangwon State, Republic of Korea.
| | - Matteo Fasano
- Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, Italy.
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Sokol MB, Beganovskaya VA, Mollaeva MR, Yabbarov NG, Chirkina MV, Belykh DV, Startseva OM, Egorov AE, Kostyukov AA, Kuzmin VA, Lomakin SM, Shilkina NG, Krivandin AV, Shatalova OV, Gradova MA, Abakumov MA, Nikitin AA, Maksimova VP, Kirsanov KI, Nikolskaya ED. Pharmaceutical Approach to Develop Novel Photosensitizer Nanoformulation: An Example of Design and Characterization Rationale of Chlorophyll α Derivative. Pharmaceutics 2024; 16:126. [PMID: 38258135 PMCID: PMC10818748 DOI: 10.3390/pharmaceutics16010126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/08/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024] Open
Abstract
In this study, we described physico-chemical properties of novel nanoformulation of photosensitizer-pyropheophorbide α 17-diethylene glycol ester (XL) (chlorophyll α derivative), revealing insights into antitumor activity and maintaining quality, meeting the pharmaceutical approach of new nanoformulation design. Our formulation, based on poly(lactic-co-glycolic acid) (PLGA) nanoparticles, increased XL solubility and selective tumor-targeted accumulation. In our research, we revealed, for the first time, that XL binding to polyvinyl alcohol (PVA) enhances XL photophysical activity, providing the rationale for PVA application as a stabilizer for nanoformulations. Results of FTIR, DSC, and XRD revealed the physical interactions between XL and excipients, including PVA, indicating that the encapsulation maintained XL binding to PVA. The encapsulated XL exhibited higher photophysical activity compared to non-encapsulated substance, which can be attributed to the influence of residual PVA. Gamma-irradiation led to degradation of XL; however, successful sterilization of the samples was achieved through the filtration. Importantly, the encapsulated and sterilized XL retained cytotoxicity against both 2D and 3D tumor cell models, demonstrating the potential of the formulated NP-XL for photodynamic therapy applications, but lacked the ability to reactivate epigenetically silenced genes. These findings provide valuable insights into the design and characterization of PLGA-based nanoparticles for the encapsulation of photosensitizers.
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Affiliation(s)
- Maria B. Sokol
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Veronika A. Beganovskaya
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Mariia R. Mollaeva
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Nikita G. Yabbarov
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Margarita V. Chirkina
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Dmitry V. Belykh
- Institute of Chemistry, Komi Scientific Center, Ural Division of the Russian Academy of Sciences, 167982 Syktyvkar, Russia;
| | - Olga M. Startseva
- Pitirim Sorokin Syktyvkar State University, 167001 Syktyvkar, Russia;
| | - Anton E. Egorov
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Alexey A. Kostyukov
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Vladimir A. Kuzmin
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
- National Research Nuclear University MEPhI, 115409 Moscow, Russia
| | - Sergei M. Lomakin
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
- N. N. Semenov Federal Research Center for Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Russia; (N.G.S.)
| | - Natalia G. Shilkina
- N. N. Semenov Federal Research Center for Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Russia; (N.G.S.)
| | - Alexey V. Krivandin
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Olga V. Shatalova
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
| | - Margarita A. Gradova
- N. N. Semenov Federal Research Center for Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Russia; (N.G.S.)
| | - Maxim A. Abakumov
- Laboratory of Biomedical Nanomaterials, National University of Science and Technology (MISIS), 119049 Moscow, Russia; (M.A.A.); (A.A.N.)
| | - Aleksey A. Nikitin
- Laboratory of Biomedical Nanomaterials, National University of Science and Technology (MISIS), 119049 Moscow, Russia; (M.A.A.); (A.A.N.)
| | - Varvara P. Maksimova
- Blokhin National Medical Research Center of Oncology, 115478 Moscow, Russia; (V.P.M.); (K.I.K.)
| | - Kirill I. Kirsanov
- Blokhin National Medical Research Center of Oncology, 115478 Moscow, Russia; (V.P.M.); (K.I.K.)
| | - Elena D. Nikolskaya
- N. M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (M.B.S.); (V.A.B.); (M.R.M.); (M.V.C.); (A.E.E.); (V.A.K.); (S.M.L.); (A.V.K.); (O.V.S.)
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Costello MA, Liu J, Kuehster L, Wang Y, Qin B, Xu X, Li Q, Smith WC, Lynd NA, Zhang F. Role of PLGA Variability in Controlled Drug Release from Dexamethasone Intravitreal Implants. Mol Pharm 2023; 20:6330-6344. [PMID: 37955890 DOI: 10.1021/acs.molpharmaceut.3c00742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Long-acting injectable formulations based on poly(lactide-co-glycolide) (PLGA) have been commercialized for over 30 years in at least 20 FDA-approved products. These formulations offer several advantages, including reduced dosing frequency, improved patient compliance, and maintenance of therapeutic levels of drug. Despite extensive studies, the inherent complexity of the PLGA copolymer still poses significant challenges associated with the development of generic formulations having drug release profiles equivalent to those of the reference listed drugs. In addition, small changes to PLGA physicochemical properties or the drug product manufacturing process can have a major impact on the drug release profile of these long-acting formulations. This work seeks to better understand how variability in the physicochemical properties of similar PLGAs affects drug release from PLGA solid implants using Ozurdex (dexamethasone intravitreal implant) as the model system. Four 50:50, acid-terminated PLGAs of similar molecular weights were used to prepare four dexamethasone intravitreal implants structurally equivalent to Ozurdex. The PLGAs were extensively characterized by using a variety of analytical techniques prior to implant manufacture using a continuous, hot-melt extrusion process. In vitro release testing of the four structurally equivalent implants was performed in both normal saline and phosphate-buffered saline (PBS), yielding drastically different results between the two methods. In normal saline, no differences in the release profiles were observed. In PBS, the drug release profiles were sensitive to small changes in the residual monomer content, carboxylic acid end group content, and blockiness of the polymers. This finding further underscores the need for a physiologically relevant in vitro release testing method as part of a robust quality control strategy for PLGA-based solid implant formulations.
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Affiliation(s)
- Mark A Costello
- College of Pharmacy, Department of Molecular Pharmaceutics and Drug Delivery, University of Texas at Austin, Austin, Texas 78712, United States
| | - Joseph Liu
- College of Pharmacy, Department of Molecular Pharmaceutics and Drug Delivery, University of Texas at Austin, Austin, Texas 78712, United States
| | - Louise Kuehster
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Yan Wang
- Center for Drug Evaluation and Research, Office of Generic Drugs, Office of Research and Standards, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Bin Qin
- Center for Drug Evaluation and Research, Office of Generic Drugs, Office of Research and Standards, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Xiaoming Xu
- Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Qi Li
- Center for Drug Evaluation and Research, Office of Generic Drugs, Office of Research and Standards, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - William C Smith
- Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Nathaniel A Lynd
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
- Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, United States
| | - Feng Zhang
- College of Pharmacy, Department of Molecular Pharmaceutics and Drug Delivery, University of Texas at Austin, Austin, Texas 78712, United States
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Otte A, Soh BK, Park K. The Impact of Post-Processing Temperature on PLGA Microparticle Properties. Pharm Res 2023; 40:2677-2685. [PMID: 37589826 PMCID: PMC10840666 DOI: 10.1007/s11095-023-03568-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 07/13/2023] [Indexed: 08/18/2023]
Abstract
PURPOSE Biodegradable poly(lactide-co-glycolide) (PLGA) microparticles loaded with either risperidone or naltrexone were prepared from an emulsification homogenization process. The objective of this study was to determine the impact the post-treatment temperature has on the properties and subsequent performance of the microparticles. METHODS The post-treatment temperature of an ethanolic solution was characterized from 10 ~ 35ºC for the naltrexone and risperidone micropartilces. RESULTS The wash temperature resulted in a typical triphasic in vitro release pattern at low wash temperatures or a biphasic pattern consisting of an elevated release rate at higher post-treatment temperatures. The post-treatment temperature largely influences the particle morphology, residual solvent levels, glass transition temperature, and drug loading and is molecule dependent, whereby these characteristics subsequently influence the drug release rate. CONCLUSION The study highlights the importance of both the post-treatment process and control during manufacturing to obtain a formulation within the desired product profile.
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Affiliation(s)
- Andrew Otte
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA.
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, IN, 47907, USA.
| | - Bong Kwan Soh
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Chong Kun Dang Pharmaceuticals Inc, Seoul, Republic of Korea
| | - Kinam Park
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, IN, 47907, USA
- Akina, Inc, West Lafayette, IN, 47906, USA
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5
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Glass Transition Temperature of PLGA Particles and the Influence on Drug Delivery Applications. Polymers (Basel) 2022; 14:polym14050993. [PMID: 35267816 PMCID: PMC8912735 DOI: 10.3390/polym14050993] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 02/25/2022] [Accepted: 02/27/2022] [Indexed: 12/31/2022] Open
Abstract
Over recent decades, poly(lactic-co-glycolic acid) (PLGA) based nano- and micro- drug delivery vehicles have been rapidly developed since PLGA was approved by the Food and Drug Administration (FDA). Common factors that influence PLGA particle properties have been extensively studied by researchers, such as particle size, polydispersity index (PDI), surface morphology, zeta potential, and drug loading efficiency. These properties have all been found to be key factors for determining the drug release kinetics of the drug delivery particles. For drug delivery applications the drug release behavior is a critical property, and PLGA drug delivery systems are still plagued with the issue of burst release when a large portion of the drug is suddenly released from the particle rather than the controlled release the particles are designed for. Other properties of the particles can play a role in the drug release behavior, such as the glass transition temperature (Tg). The Tg, however, is an underreported property of current PLGA based drug delivery systems. This review summarizes the basic knowledge of the glass transition temperature in PLGA particles, the factors that influence the Tg, the effect of Tg on drug release behavior, and presents the recent awareness of the influence of Tg on drug delivery applications.
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Otte A, Damen F, Goergen C, Park K. Coupling the in vivo performance to the in vitro characterization of PLGA microparticles. Int J Pharm 2021; 604:120738. [PMID: 34048931 DOI: 10.1016/j.ijpharm.2021.120738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 05/18/2021] [Accepted: 05/23/2021] [Indexed: 12/12/2022]
Abstract
The main objective of the study was to determine if rodent housing conditions, specifically housing climate, could impact the in vivo performance of poly(lactide-co-glycolide) (PLGA) microspheres through temperature modification of the subcutaneous space. Vivitrol®, a once monthly naltrexone injectable suspension, was chosen as a model PLGA microparticle formulation for this study. Two lots of Vivitrol were used to ascertain any potential differences that may exist between the batches and if in vitro characterization techniques could delineate any variation(s). The pharmacokinetics of the naltrexone-PLGA microparticles were determined in the rodent model under two different housing climates (20 vs. 25 °C). The results demonstrate that such difference in housing temperature resulted in a change in subcutaneous temperature but actually within a narrow range (36.31-36.77 °C) and thus minimally influenced the in vivo performance of subcutaneously injected microparticles. The shake-flask method was used to characterize the in vitro release at 35, 36, and 37 °C and demonstrated significant differences in the in vitro release profiles across this range of temperatures. Minimal differences in the in vitro characterization of the two lots were found. While these results did not provide statistical significance, the local in vivo temperature may be a parameter that should be considered when evaluating microparticle performance. The IVIVCs demonstrate that in vitro release at 37 °C may not accurately represent the in vivo conditions (i.e., subcutaneous space in rodents), and in certain instances lower in vitro release temperatures may more accurately represent the in vivo microenvironment and provide better correlations. Future studies will determine the extent temperature and specifically co-housing, may have on the relative impact of the in vivo performance of injectable polymeric microparticles based upon the significant differences observed in the in vitro release profiles across the range of 35-37 °C.
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Affiliation(s)
- Andrew Otte
- Purdue University, Weldon School of Biomedical Engineering, West Lafayette, IN 47907, USA.
| | - Frederick Damen
- Purdue University, Weldon School of Biomedical Engineering, West Lafayette, IN 47907, USA
| | - Craig Goergen
- Purdue University, Weldon School of Biomedical Engineering, West Lafayette, IN 47907, USA
| | - Kinam Park
- Purdue University, Weldon School of Biomedical Engineering, West Lafayette, IN 47907, USA; Purdue University, Department of Pharmaceutics, West Lafayette, IN 47907, USA
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Grune C, Zens C, Czapka A, Scheuer K, Thamm J, Hoeppener S, Jandt KD, Werz O, Neugebauer U, Fischer D. Sustainable preparation of anti-inflammatory atorvastatin PLGA nanoparticles. Int J Pharm 2021; 599:120404. [PMID: 33647413 DOI: 10.1016/j.ijpharm.2021.120404] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/03/2021] [Accepted: 02/13/2021] [Indexed: 12/18/2022]
Abstract
In the present study, the anti-inflammatory lipophilic drug atorvastatin was encapsulated in poly(D,L-lactide-co-glycolide) (PLGA) using a sustainable method in comparison to the standard emulsion-diffusion-evaporation technique. For the sustainable method the organic solvent ethyl acetate was fully replaced by 400 g/mol poly(ethylene glycol) (PEG 400). Both techniques led to the formation of nanoparticles with comparable sizes of about 170 to 247 nm depending on the polymer type, with monomodal size distribution and negative zeta potential. All nanoparticles demonstrated a high biocompatibility in a shell-less hen's egg model and displayed an anti-inflammatory effect in human monocytes. The use of PEG 400 resulted in plasticizing effects and a lower crystallinity of the PLGA nanoparticles as determined by differential scanning calorimetry and Raman spectroscopy, which correlated with a faster drug release. Interestingly, the particles prepared by the sustainable method showed a crystallinity and drug release kinetics similar to nanoparticles made of PEG-PLGA using the standard method. Conclusively, the sustainable method is a fast and easy to perform technique suitable to prepare atorvastatin-loaded PLGA nanoparticles avoiding toxic and environmentally damaging drawbacks frequently associated with classical organic solvents.
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Affiliation(s)
- Christian Grune
- Pharmaceutical Technology and Biopharmacy, Institute of Pharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany
| | - Clara Zens
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany; Center for Sepsis Control and Care, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
| | - Anna Czapka
- Dept. of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, Philosophenweg 14, 07743 Jena, Germany
| | - Karl Scheuer
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Jana Thamm
- Pharmaceutical Technology and Biopharmacy, Institute of Pharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany
| | - Stephanie Hoeppener
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany; Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
| | - Klaus D Jandt
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Oliver Werz
- Dept. of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, Philosophenweg 14, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ute Neugebauer
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany; Center for Sepsis Control and Care, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Dagmar Fischer
- Pharmaceutical Technology and Biopharmacy, Institute of Pharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany; Pharmaceutical Technology, Department for Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany.
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Park K, Otte A, Sharifi F, Garner J, Skidmore S, Park H, Jhon YK, Qin B, Wang Y. Potential Roles of the Glass Transition Temperature of PLGA Microparticles in Drug Release Kinetics. Mol Pharm 2020; 18:18-32. [PMID: 33331774 DOI: 10.1021/acs.molpharmaceut.0c01089] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Poly(lactic-co-glycolic acid) (PLGA) has been used for long-acting injectable drug delivery systems for more than 30 years. The factors affecting the properties of PLGA formulations are still not clearly understood. The drug release kinetics of PLGA microparticles are influenced by many parameters associated with the formulation composition, manufacturing process, and post-treatments. Since the drug release kinetics have not been explainable using the measurable properties, formulating PLGA microparticles with desired drug release kinetics has been extremely difficult. Of the various properties, the glass transition temperature, Tg, of PLGA formulations is able to explain various aspects of drug release kinetics. This allows examination of parameters that affect the Tg of PLGA formulations, and thus, affecting the drug release kinetics. The impacts of the terminal sterilization on the Tg and drug release kinetics were also examined. The analysis of drug release kinetics in relation to the Tg of PLGA formulations provides a basis for further understanding of the factors controlling drug release.
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Affiliation(s)
- Kinam Park
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.,College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States.,Akina, Inc., West Lafayette, Indiana 47906, United States
| | - Andrew Otte
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Farrokh Sharifi
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - John Garner
- Akina, Inc., West Lafayette, Indiana 47906, United States
| | - Sarah Skidmore
- Akina, Inc., West Lafayette, Indiana 47906, United States
| | - Haesun Park
- Akina, Inc., West Lafayette, Indiana 47906, United States
| | - Young Kuk Jhon
- Office of Pharmaceutical Quality, Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland 20993, United States
| | - Bin Qin
- Office of Generic Drugs, Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland 20993, United States
| | - Yan Wang
- Office of Generic Drugs, Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland 20993, United States
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Kožák J, Rabišková M, Lamprecht A. In-vitro drug release testing of parenteral formulations via an agarose gel envelope to closer mimic tissue firmness. Int J Pharm 2020; 594:120142. [PMID: 33326826 DOI: 10.1016/j.ijpharm.2020.120142] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/10/2020] [Accepted: 11/28/2020] [Indexed: 01/20/2023]
Abstract
Current in vitro drug-release testing of the sustained-release parenterals represents the in vivo situation insufficiently. In this work, a thin agarose hydrogel layer surrounding the tested dosage form was proposed to mimic the tissue. The method was applied on implantable formulations of different geometries (films, microspheres, and cylindrical implants); prepared from various polymers (several Resomer® grades or ethyl cellulose) and loaded with different model drugs: flurbiprofen, lidocaine or risperidone. The hydrogel layer did not possess any retarding effect on the released drug and acted as a physical restriction to swelling and/or plastic deformation of the tested dosage forms. This led to a different surface area available for drug-release compared with testing in release medium alone and correspondingly to significantly different release profiles of the majority of the formulations obtained between the two methods (e.g. t50% = 18 days in pure release medium vs. t50% = 26 days in gel-setup for risperidone loaded Resomer® 503 H films or t50% = 7 days vs. t50% = 19 days for risperidone loaded Resomer® 503 H microspheres). The limited space for swelling and the rigidity of the agarose gel might mimic the tight encapsulation of the dosage form in the tissue better than the conventional liquid medium.
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Affiliation(s)
- Jan Kožák
- Department of Pharmaceutics, Institute of Pharmacy, University of Bonn, Gerhard-Domagk-Straße 3, 53121 Bonn, Germany; Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Akademika Heyrovskeho 1203/8, 500 05 Hradec Kralove, Czech Republic
| | - Miloslava Rabišková
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Akademika Heyrovskeho 1203/8, 500 05 Hradec Kralove, Czech Republic
| | - Alf Lamprecht
- Department of Pharmaceutics, Institute of Pharmacy, University of Bonn, Gerhard-Domagk-Straße 3, 53121 Bonn, Germany.
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Role of hydrolytic degradation of polylactide drug carriers in developing micro- and nanoscale polylactide-based drug dosage forms. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2918-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Kumar D, Pal S. Solution dynamics of 5-fluorouracil entrapped in poly lactic-co-glycolic acid (PLGA) microsphere-A study with 1D selective NMR methods. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2018; 57:118-128. [PMID: 30303556 DOI: 10.1002/mrc.4799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/02/2018] [Indexed: 06/08/2023]
Abstract
In this report, our main focus is to introduce a set of one-dimensional (1D) NMR methods based on chemical shift, relaxation, and magnetization transfer, namely, NOE and chemical exchange involving selective pulse excitation to study the solution dynamics of drug in free and encapsulated state within polymeric microsphere. In this regard 5-fluorouracil (5-FU) loaded poly lactic-co-glycolic acid (PLGA) microspheres are prepared as model system via standard water-in-oil-in-water emulsification method. One-dimensional 1 H and 19 F nuclear magnetic resonance (NMR) spectra of 5-FU in presence of PLGA microspheres presented a significant change in linewidth and relaxation rates compared with free 5-FU confirming encapsulation. Furthermore, loss of coupling pattern in 1 H and 19 F NMR of PLGA encapsulated 5-FU as compared with free 5-FU suggests an enhanced -NH and -H2 O protons exchange dynamics in the interior of the microsphere indicating hydrated microsphere cavity. Quantification of exchange dynamics in case of free and PLGA-encapsulated 5-FU was attempted employing 1D selective NOESY and 1D multiply selective inversion recovery experiments. Analysis of the exchange rates confirmed existence of more than one kind of water population within the cavity as mentioned in an earlier solid state NMR report.
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Affiliation(s)
- Deepak Kumar
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar, India
| | - Samanwita Pal
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar, India
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Hirota K, Doty AC, Ackermann R, Zhou J, Olsen KF, Feng MR, Wang Y, Choi S, Qu W, Schwendeman AS, Schwendeman SP. Characterizing release mechanisms of leuprolide acetate-loaded PLGA microspheres for IVIVC development I: In vitro evaluation. J Control Release 2016; 244:302-313. [DOI: 10.1016/j.jconrel.2016.08.023] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/07/2016] [Accepted: 08/21/2016] [Indexed: 11/28/2022]
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13
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Johnson I, Wang SM, Silken C, Liu H. A systemic study on key parameters affecting nanocomposite coatings on magnesium substrates. Acta Biomater 2016; 36:332-49. [PMID: 27006335 DOI: 10.1016/j.actbio.2016.03.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 02/19/2016] [Accepted: 03/15/2016] [Indexed: 11/19/2022]
Abstract
UNLABELLED Nanocomposite coatings offer multiple functions simultaneously to improve the interfacial properties of magnesium (Mg) alloys for skeletal implant applications, e.g., controlling the degradation rate of Mg substrates, improving bone cell functions, and providing drug delivery capability. However, the effective service time of nanocomposite coatings may be limited due to their early delamination from the Mg-based substrates. Therefore, the objective of this study was to address the delamination issue of nanocomposite coatings, improve the coating properties for reducing the degradation of Mg-based substrates, and thus improve their cytocompatibility with bone marrow derived mesenchymal stem cells (BMSCs). The surface conditions of the substrates, polymer component type of the nanocomposite coatings, and post-deposition processing are the key parameters that contribute to the efficacy of the nanocomposite coatings in regulating substrate degradation and bone cell responses. Specifically, the effects of metallic surface versus alkaline heat-treated hydroxide surface of the substrates on coating quality were investigated. For the nanocomposite coatings, nanophase hydroxyapatite (nHA) was dispersed in three types of biodegradable polymers, i.e., poly(lactic-co-glycolic acid) (PLGA), poly(l-lactic acid) (PLLA), or poly(caprolactone) (PCL) to determine which polymer component could provide integrated properties for slowest Mg degradation. The nanocomposite coatings with or without post-deposition processing, i.e., melting, annealing, were compared to determine which processing route improved the properties of the nanocomposite coatings most significantly. The results showed that optimizing the coating processes addressed the delamination issue. The melted then annealed nHA/PCL coating on the metallic Mg substrates showed the slowest degradation and the best coating adhesion, among all the combinations of conditions studied; and, it improved the adhesion density of BMSCs. This study elucidated the key parameters for optimizing nanocomposite coatings on Mg-based substrates for skeletal implant applications, and provided rational design guidelines for the nanocomposite coatings on Mg alloys for potential clinical translation of biodegradable Mg-based implants. STATEMENT OF SIGNIFICANCE This manuscript describes the systemic optimization of nanocomposite coatings to control the degradation and bioactivity of magnesium for skeletal implant applications. The key parameters influencing the integrity and functions of the nanocomposite coatings on magnesium were identified, guidelines for the optimization of the coatings were established, and the benefits of coating optimization were demonstrated through reduced magnesium degradation and increased bone marrow derived mesenchymal stem cell (BMSC) adhesion in vitro. The guidelines developed in this manuscript are valuable for the biometal field to improve the design of bioresorbable implants and devices, which will advance the clinical translation of magnesium-based implants.
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Affiliation(s)
- Ian Johnson
- Department of Bioengineering, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States
| | - Sebo Michelle Wang
- Department of Bioengineering, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States
| | - Christine Silken
- Department of Bioengineering, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States
| | - Huinan Liu
- Department of Bioengineering, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States; Materials Science and Engineering Program, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States; The Stem Cell Center, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States; Cellular, Molecular, and Developmental Biology (CMDB) Program, University of California at Riverside, 900 University Avenue, Riverside, CA 92521, United States.
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