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Rahman SU, Nagrath M, Ponnusamy S, Arany PR. Nanoscale and Macroscale Scaffolds with Controlled-Release Polymeric Systems for Dental Craniomaxillofacial Tissue Engineering. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1478. [PMID: 30127246 PMCID: PMC6120038 DOI: 10.3390/ma11081478] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/03/2018] [Accepted: 08/10/2018] [Indexed: 12/11/2022]
Abstract
Tremendous progress in stem cell biology has resulted in a major current focus on effective modalities to promote directed cellular behavior for clinical therapy. The fundamental principles of tissue engineering are aimed at providing soluble and insoluble biological cues to promote these directed biological responses. Better understanding of extracellular matrix functions is ensuring optimal adhesive substrates to promote cell mobility and a suitable physical niche to direct stem cell responses. Further, appreciation of the roles of matrix constituents as morphogen cues, termed matrikines or matricryptins, are also now being directly exploited in biomaterial design. These insoluble topological cues can be presented at both micro- and nanoscales with specific fabrication techniques. Progress in development and molecular biology has described key roles for a range of biological molecules, such as proteins, lipids, and nucleic acids, to serve as morphogens promoting directed behavior in stem cells. Controlled-release systems involving encapsulation of bioactive agents within polymeric carriers are enabling utilization of soluble cues. Using our efforts at dental craniofacial tissue engineering, this narrative review focuses on outlining specific biomaterial fabrication techniques, such as electrospinning, gas foaming, and 3D printing used in combination with polymeric nano- or microspheres. These avenues are providing unprecedented therapeutic opportunities for precision bioengineering for regenerative applications.
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Affiliation(s)
- Saeed Ur Rahman
- Departments of Oral Biology and Biomedical Engineering, School of Dentistry, University at Buffalo, Buffalo, NY 14214, USA.
- Interdisciplinary Research Centre in Biomedical Materials, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan.
| | - Malvika Nagrath
- Departments of Oral Biology and Biomedical Engineering, School of Dentistry, University at Buffalo, Buffalo, NY 14214, USA.
- Department of Biomedical Engineering, Ryerson University, Toronto, ON M5B 2K3, Canada.
| | - Sasikumar Ponnusamy
- Departments of Oral Biology and Biomedical Engineering, School of Dentistry, University at Buffalo, Buffalo, NY 14214, USA.
| | - Praveen R Arany
- Departments of Oral Biology and Biomedical Engineering, School of Dentistry, University at Buffalo, Buffalo, NY 14214, USA.
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202
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Nanaki S, Barmpalexis P, Papakonstantinou Z, Christodoulou E, Kostoglou M, Bikiaris DN. Preparation of New Risperidone Depot Microspheres Based on Novel Biocompatible Poly(Alkylene Adipate) Polyesters as Long-Acting Injectable Formulations. J Pharm Sci 2018; 107:2891-2901. [PMID: 30096352 DOI: 10.1016/j.xphs.2018.07.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 06/29/2018] [Accepted: 07/31/2018] [Indexed: 10/28/2022]
Abstract
Risperidone (RIS)-loaded microspheres based on poly(alkylene adipate)s derived from dicarboxylic acids and different aliphatic diols were prepared by the oil in water emulsion and solvent evaporation method. Specifically, 3 polyesters, namely poly(ethylene adipate), poly(propylene adipate), and poly(butylene adipate), were prepared with the aid of a 2-stage melt-polycondensation method and characterized by gel permeation chromatography, proton nuclear magnetic resonance (1H NMR), differential scanning calorimetry, and X-ray diffraction analysis. Results showed that the molecular weight of the polyesters increased as the diol molecular weight increased, while all polymers were of semi-crystalline nature and the melting temperature was varying from 49.1°C to 51.8°C and 65.9°C for poly(propylene adipate), poly(ethylene adipate), and poly(butylene adipate), respectively. The particle size of the RIS-loaded microspheres varied from 10 to 100 μm depending on the polyester type and the drug loading, while X-ray diffraction analysis revealed amorphous active pharmaceutical ingredient in the cases of high drug-loaded microspheres. In vitro drug release studies along with scanning electron microscopy images of microspheres after the completion of dissolution process showed that in all cases RIS release was controlled by the glass transition temperature of polyesters and physical state of active pharmaceutical ingredients via diffusion.
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Affiliation(s)
- Stavroula Nanaki
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Panagiotis Barmpalexis
- Department of Pharmaceutical Technology, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Zoi Papakonstantinou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evi Christodoulou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Margaritis Kostoglou
- Laboratory of General and Inorganic Chemical Technology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Dimitrios N Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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203
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Zavrazhnov SA, Esipovich AL, Danov SM, Zlobin SY, Belousov AS. Catalytic Conversion of Glycerol to Lactic Acid: State of the Art and Prospects. KINETICS AND CATALYSIS 2018. [DOI: 10.1134/s0023158418040171] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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204
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Wilkosz N, Łazarski G, Kovacik L, Gargas P, Nowakowska M, Jamróz D, Kepczynski M. Molecular Insight into Drug-Loading Capacity of PEG-PLGA Nanoparticles for Itraconazole. J Phys Chem B 2018; 122:7080-7090. [PMID: 29927603 DOI: 10.1021/acs.jpcb.8b03742] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Nanoparticles made of amphiphilic block copolymers comprising biodegradable core-forming blocks are very attractive for the preparation of drug-delivery systems with sustained release. Their therapeutic applications are, however, hindered by low values of the drug-loading content (DLC). The compatibility between the drug and the core-forming block of the copolymer is considered the most important factor affecting the DLC value. However, the molecular picture of the hydrophobic drug-copolymer interaction is still not fully recognized. Herein, we examined this complex issue using a range of experimental techniques in combination with atomistic molecular dynamics simulations. We performed an analysis of the interaction between itraconazole, a model hydrophobic drug, and a poly(ethylene glycol)-poly(lactide- co-glycolide) (PEG-PLGA) copolymer, a biodegradable copolymer commonly used for the preparation of drug-delivery systems. Our results clearly show that the limited capacity of the PEG-PLGA nanoparticles for the accumulation of hydrophobic drugs is due to the fact that the drug molecules are located only at the water-polymer interface, whereas the interior of the PLGA core remains empty. These findings can be useful in the rational design and development of amphiphilic copolymer-based drug-delivery systems.
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Affiliation(s)
- Natalia Wilkosz
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Grzegorz Łazarski
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Lubomir Kovacik
- Institute of Biology and Medical Genetics, First Faculty of Medicine , Charles University , Albertov 4 , 128 01 Prague , Czech Republic
| | - Patrycja Gargas
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Maria Nowakowska
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Dorota Jamróz
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Mariusz Kepczynski
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
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205
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Davoodi P, Lee LY, Xu Q, Sunil V, Sun Y, Soh S, Wang CH. Drug delivery systems for programmed and on-demand release. Adv Drug Deliv Rev 2018; 132:104-138. [PMID: 30415656 DOI: 10.1016/j.addr.2018.07.002] [Citation(s) in RCA: 185] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/25/2018] [Accepted: 07/02/2018] [Indexed: 01/06/2023]
Abstract
With the advancement in medical science and understanding the importance of biodistribution and pharmacokinetics of therapeutic agents, modern drug delivery research strives to utilize novel materials and fabrication technologies for the preparation of robust drug delivery systems to combat acute and chronic diseases. Compared to traditional drug carriers, which could only control the release of the agents in a monotonic manner, the new drug carriers are able to provide a precise control over the release time and the quantity of drug introduced into the patient's body. To achieve this goal, scientists have introduced "programmed" and "on-demand" approaches. The former provides delivery systems with a sophisticated architecture to precisely tune the release rate for a definite time period, while the latter includes systems directly controlled by an operator/practitioner, perhaps with a remote device triggering/affecting the implanted or injected drug carrier. Ideally, such devices can determine flexible release pattern and intensify the efficacy of a therapy via controlling time, duration, dosage, and location of drug release in a predictable, repeatable, and reliable manner. This review sheds light on the past and current techniques available for fabricating and remotely controlling drug delivery systems and addresses the application of new technologies (e.g. 3D printing) in this field.
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206
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Formation, characterization and release behavior of citrus oil-polymer microparticles using particles from gas saturated solutions (PGSS) process. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.02.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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207
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Antileishmanial and Immunomodulatory Effect of Babassu-Loaded PLGA Microparticles: A Useful Drug Target to Leishmania amazonensis Infection. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:3161045. [PMID: 30046335 PMCID: PMC6036798 DOI: 10.1155/2018/3161045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 05/03/2018] [Accepted: 05/16/2018] [Indexed: 01/21/2023]
Abstract
The immunological and the anti-Leishmania amazonensis activity of babassu-loaded poly(lactic-co-glycolic acid) [PLGA] microparticles was evaluated. The anti-Leishmania activity was evaluated against promastigotes or amastigotes forms, in Balb/c macrophages. The size of the microparticles ranged from 3 to 6.4 μm, with a zeta potential of −25 mV and encapsulation efficiency of 48%. The anti-Leishmania activity of the PLGA microparticles loaded with the aqueous extract of babassu mesocarp (MMP) (IC50) was 10-fold higher than that free extract (Meso). MMP exhibited overall bioavailability and was very effective in eliminating intracellular parasites. MMP also reduced ex vivo parasite infectivity probably by the increased production of nitric oxide, hydrogen peroxide, and TNF-α indicating the activation of M1 macrophages. The overexpression of TNF-α did not impair cell viability, suggesting antiapoptotic effects of MMP. In conclusion, babassu-loaded microparticles could be useful for drug targeting in the treatment of leishmaniasis, due to the immunomodulatory effect on macrophage polarization and the increased efficacy as an anti-Leishmania product after the microencapsulation. These findings are of great relevance since the development of new drugs for the treatment of neglected diseases is desirable, mainly if we consider the high morbidity and mortality rates of leishmaniasis worldwide.
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208
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Swider E, Koshkina O, Tel J, Cruz LJ, de Vries IJM, Srinivas M. Customizing poly(lactic-co-glycolic acid) particles for biomedical applications. Acta Biomater 2018; 73:38-51. [PMID: 29653217 DOI: 10.1016/j.actbio.2018.04.006] [Citation(s) in RCA: 183] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/28/2018] [Accepted: 04/03/2018] [Indexed: 12/22/2022]
Abstract
Nano- and microparticles have increasingly widespread applications in nanomedicine, ranging from drug delivery to imaging. Poly(lactic-co-glycolic acid) (PLGA) particles are the most widely-applied type of particles due to their biocompatibility and biodegradability. Here, we discuss the preparation of PLGA particles, and various modifications to tailor particles for applications in biological systems. We highlight new preparation approaches, including microfluidics and PRINT method, and modifications of PLGA particles resulting in novel or responsive properties, such as Janus or upconversion particles. Finally, we describe how the preparation methods can- and should-be adapted to tailor the properties of particles for the desired biomedical application. Our aim is to enable researchers who work with PLGA particles to better appreciate the effects of the selected preparation procedure on the final properties of the particles and its biological implications. STATEMENT OF SIGNIFICANCE Nanoparticles are increasingly important in the field of biomedicine. Particles made of polymers are in the spotlight, due to their biodegradability, biocompatibility, versatility. In this review, we aim to discuss the range of formulation techniques, manipulations, and applications of poly(lactic-co-glycolic acid) (PLGA) particles, to enable a researcher to effectively select or design the optimal particles for their application. We describe the various techniques of PLGA particle synthesis and their impact on possible applications. We focus on recent developments in the field of PLGA particles, and new synthesis techniques that have emerged over the past years. Overall, we show how the chemistry of PLGA particles can be adapted to solve pressing biological needs.
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209
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Antihypertensive and Antioxidant Properties from Whey Protein Hydrolysates Produced by Encapsulated Bacillus subtilis Cells. Int J Pept Res Ther 2018. [DOI: 10.1007/s10989-018-9714-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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210
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Cauley AN, Wilson JN. Functionalized lignin biomaterials for enhancing optical properties and cellular interactions of dyes. Biomater Sci 2018; 5:2114-2121. [PMID: 28831468 DOI: 10.1039/c7bm00518k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We report a library of functionalized lignins and demonstrate their utility as nanocontainers for organic dyes in biologically relevant applications. Kraft lignin was modified via SN2 reaction at the phenolic -OH group utilizing a mild base, potassium carbonate, and various alkyl halides, several bearing additional functionalities, with dimethylsulfoxide as solvent. The resulting phenoxy ethers were characterized by 1H-NMR and IR spectroscopy, as well as DLS and SEM to evaluate their morphology and supramolecular organization. Lignin modified with long-chain hydrocarbon tails was found to effectively encapsulate DiD, a cyanine dye, decrease aggregation, enhance optical transitions and exert a photoprotective effect. The dye-lignin assemblies were also examined as imaging agents, via confocal microscopy, and found to accumulate intracellularly with no leaching of the dye to hydrophobic subcellular components observed. Lignin functionalized with short chain carboxylic acids interacts with ligands directed at the norepinephrine transporter (NET), suggesting applications in sequestration of neuroactive compounds.
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Affiliation(s)
- Anthony N Cauley
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, FL 33124, USA.
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211
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Yang X, Yu B, Zhong Z, Guo BH, Huang Y. Nevirapine-polycaprolactone crystalline inclusion complex as a potential long-acting injectable solid form. Int J Pharm 2018; 543:121-129. [DOI: 10.1016/j.ijpharm.2018.03.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/08/2018] [Accepted: 03/24/2018] [Indexed: 11/16/2022]
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212
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Rashid J, Alobaida A, Al-Hilal TA, Hammouda S, McMurtry IF, Nozik-Grayck E, Stenmark KR, Ahsan F. Repurposing rosiglitazone, a PPAR-γ agonist and oral antidiabetic, as an inhaled formulation, for the treatment of PAH. J Control Release 2018; 280:113-123. [PMID: 29723610 DOI: 10.1016/j.jconrel.2018.04.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 04/28/2018] [Indexed: 12/20/2022]
Abstract
Peroxisome-proliferator-activated-receptor-gamma (PPAR-γ) is implicated, in some capacity, in the pathogenesis of pulmonary arterial hypertension (PAH). Rosiglitazone, an oral antidiabetic and PPAR-γ agonist, has the potential to dilate pulmonary arteries and to attenuate arterial remodeling in PAH. Here, we sought to test the hypothesis that rosiglitazone can be repurposed as inhaled formulation for the treatment of PAH. We have tested this conjecture by preparing and optimizing poly(lactic-co-glycolic) acid (PLGA) based particles of rosiglitazone, assessing the drug particles for pulmonary absorption, investigating the efficacy of the plain versus particulate drug formulation in improving the respiratory hemodynamics in PAH animals, and finally studying the effect of the drug in regulating the molecular markers associated with PAH pathogenesis. The optimized particles were slightly porous and spherical, and released 87.9% ± 6.7% of the drug in 24 h. The elimination half-life of the drug formulated in PLGA particles was 2.5-fold greater than that of the plain drug administered via the same route at the same dose. The optimized formulation, given via the pulmonary route, produced pulmonary selective vasodilation in PAH animals, but oral rosiglitazone had no effect in pulmonary hemodynamics. Rosiglitazone ameliorates the pathogenesis of PAH by balancing the molecular regulators involved in the vasoconstriction and vasodilation of human pulmonary arterial smooth muscle cells. All in all, data generated using intact animal and cellular models point to the conclusion that PLGA particles of an antidiabetic drug can be used for the treatment of a different disease, PAH.
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Affiliation(s)
- Jahidur Rashid
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center School of Pharmacy, Amarillo, TX 79106, USA
| | - Ahmad Alobaida
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center School of Pharmacy, Amarillo, TX 79106, USA
| | - Taslim A Al-Hilal
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center School of Pharmacy, Amarillo, TX 79106, USA
| | - Samia Hammouda
- The School of Sciences and Engineering, The American University in Cairo, Cairo, Egypt
| | - Ivan F McMurtry
- Department of Pharmacology, The Center for Lung Biology, University of South Alabama, Mobile, AL 36688, USA
| | - Eva Nozik-Grayck
- Department of Pediatrics, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Kurt R Stenmark
- Department of Pediatrics, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Fakhrul Ahsan
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center School of Pharmacy, Amarillo, TX 79106, USA.
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213
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Sandker MJ, Duque LF, Redout EM, Klijnstra EC, Steendam R, Kops N, Waarsing JH, van Weeren R, Hennink WE, Weinans H. Degradation, Intra-Articular Biocompatibility, Drug Release, and Bioactivity of Tacrolimus-Loaded Poly(d-l-lactide-PEG)-b-poly(l-lactide) Multiblock Copolymer-Based Monospheres. ACS Biomater Sci Eng 2018; 4:2390-2403. [DOI: 10.1021/acsbiomaterials.8b00116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Maria J. Sandker
- Department of Orthopaedics, Erasmus Medical Centre, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
- Department of Orthopaedics, UMC Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Luisa F. Duque
- InnoCore Pharmaceuticals, L.J. Zielstraweg 1, 9713 GX Groningen, The Netherlands
| | - Everaldo M. Redout
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - Evelien C. Klijnstra
- InnoCore Pharmaceuticals, L.J. Zielstraweg 1, 9713 GX Groningen, The Netherlands
| | - Rob Steendam
- InnoCore Pharmaceuticals, L.J. Zielstraweg 1, 9713 GX Groningen, The Netherlands
| | - Nicole Kops
- Department of Orthopaedics, Erasmus Medical Centre, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Jan H. Waarsing
- Department of Orthopaedics, Erasmus Medical Centre, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Rene van Weeren
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - Wim E. Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3512 JE Utrecht, The Netherlands
| | - Harrie Weinans
- Department of Orthopaedics and Department of Rheumatology, UMC Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
- Department of Biomechanical Engineering, TUDelft, Mekelweg 2, 2628 CD Delft, The Netherlands
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214
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Hussain SA, Abdelkader H, Abdullah N, Kmaruddin S. Review on micro-encapsulation with Chitosan for pharmaceuticals applications. ACTA ACUST UNITED AC 2018. [DOI: 10.15406/mojcrr.2018.01.00013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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215
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Peng Y, Tellier LE, Temenoff JS. Heparin-based hydrogels with tunable sulfation & degradation for anti-inflammatory small molecule delivery. Biomater Sci 2018; 4:1371-80. [PMID: 27447003 DOI: 10.1039/c6bm00455e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Sustained release of anti-inflammatory agents remains challenging for small molecule drugs due to their low molecular weight and hydrophobicity. Therefore, the goal of this study was to control the release of a small molecule anti-inflammatory agent, crystal violet (CV), from hydrogels fabricated with heparin, a highly sulfated glycosaminoglycan capable of binding positively-charged molecules such as CV. In this system, both electrostatic interactions between heparin and CV and hydrogel degradation were tuned simultaneously by varying the level of heparin sulfation and varying the amount of dithiothreitol within hydrogels, respectively. It was found that heparin sulfation significantly affected CV release, whereby more sulfated heparin hydrogels (Hep and Hep(-N)) released CV with near zero-order release kinetics (R-squared values between 0.96-0.99). Furthermore, CV was released more quickly from fast-degrading hydrogels than slow-degrading hydrogels, providing a method to tune total CV release between 5-15 days while maintaining linear release kinetics. In particular, N-desulfated heparin hydrogels exhibited efficient CV loading (∼90% of originally included CV), near zero-order CV release kinetics, and maintenance of CV bioactivity after release, making this hydrogel formulation a promising CV delivery vehicle for a wide range of inflammatory diseases.
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Affiliation(s)
- Yifeng Peng
- W.H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA.
| | - Liane E Tellier
- W.H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA.
| | - Johnna S Temenoff
- W.H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA. and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332, USA
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216
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Park CW, Lee HJ, Oh DW, Kang JH, Han CS, Kim DW. Preparation and in vitro/in vivo evaluation of PLGA microspheres containing norquetiapine for long-acting injection. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:711-719. [PMID: 29670329 PMCID: PMC5896679 DOI: 10.2147/dddt.s151437] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Norquetiapine (N-desalkyl quetiapine, NQ) is an active metabolite of quetiapine with stable pharmacokinetic and pharmacological properties. However, its short half-life is a drawback for clinical applications, and long-acting formulations are required. Purpose The objectives of this study were to prepare improved entrapment efficiency NQ freebase microspheres by the solvent evaporation method with poly(d,l-lactic-co-glycolic acid) (PLGA) as a release modulator and to evaluate their physicochemical and in vitro/in vivo release properties. Methods NQ freebase PLGA (1:5 w/w) formulations were prepared by the oil-in-water (o/w) emulsion–solvent evaporation method. A solution of the drug and PLGA in 9:1 v/v dichloromethane:ethanol was mixed with 0.2% polyvinyl alcohol and homogenized at 2,800 rpm. The emulsion was stirred for 3 h to dilute and evaporate the solvent. After that, the resulting product was freeze-dried. Drug-loading capacity was measured by the validated RP-HPLC method. The surface morphology of the microspheres was observed by scanning electron microscopy (SEM), and the physicochemical properties were evaluated by differential scanning calorimetry, powder X-ray diffraction, and Fourier-transform infrared spectroscopy particle size distribution. The in vitro dissolution test was performed using a rotary shaking bath at 37°C, with constant shaking at 50 rpm in sink condition. Results The NQ freebase microspheres prepared by o/w emulsion-solvent evaporation showed over 30% efficiency. NQ was confirmed to be amorphous in the microspheres by powder X-ray diffraction and differential scanning calorimetry. Special chemical interaction in the microspheres was not observed by FT-IR. The in vitro dissolution test demonstrated that the prepared microspheres’ release properties were maintained for more than 20 days. The in vivo test also confirmed that the particles’ long acting properties were maintained. Therefore, good in vitro–in vivo correlation was established. Conclusion In this study, NQ freebase-PLGA microspheres showed potential for the treatment of schizophrenia for long-periods.
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Affiliation(s)
- Chun-Woong Park
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Hyo-Jung Lee
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Dong-Won Oh
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Ji-Hyun Kang
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Chang-Soo Han
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Dong-Wook Kim
- Department of Pharmaceutical Engineering, Cheongju University, Cheongju, Republic of Korea
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217
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Narmani A, Farhood B, Haghi-Aminjan H, Mortezazadeh T, Aliasgharzadeh A, Mohseni M, Najafi M, Abbasi H. Gadolinium nanoparticles as diagnostic and therapeutic agents: Their delivery systems in magnetic resonance imaging and neutron capture therapy. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.01.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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218
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Bone regeneration in osteoporosis by delivery BMP-2 and PRGF from tetronic-alginate composite thermogel. Int J Pharm 2018; 543:160-168. [PMID: 29567197 DOI: 10.1016/j.ijpharm.2018.03.034] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 03/09/2018] [Accepted: 03/17/2018] [Indexed: 02/07/2023]
Abstract
As the life expectancy of the world population increases, osteoporotic (OP) fracture risk increase. Therefore in the present study a novel injectable thermo-responsive hydrogel loaded with microspheres of 17β-estradiol, microspheres of bone morphogenetic protein-2 (BMP-2) and plasma rich in growth factors (PRGF) was applied locally to regenerate a calvaria critical bone defect in OP female rats. Three systems were characterized: Tetronic® 1307 (T-1307) reinforced with alginate (T-A), T-A with PRGF and T-A-PRGF with microspheres. The addition of the microspheres increased the viscosity but the temperature for the maximum viscosity did not change (22-24 °C). The drugs were released during 6 weeks in one fast phase (three days) followed by a long slow phase. In vivo evaluation was made in non-OP and OP rats treated with T-A, T-A with microspheres of 17β-estradiol (T-A-βE), T-A-βE prepared with PRGF (T-A-PRGF-βE), T-A-βE with microspheres of BMP-2 (T-A-βE-BMP-2) and the combination of the three (T-A-PRGF-βE-BMP). After 12 weeks, histological and histomorphometric analyzes showed a synergic effect due to the addition of BMP-2 to the T-A-βE formulation. The PRGF did not increased the bone repair. The new bone filling the OP defect was less mineralized than in the non-OP groups.
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219
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Vorselen D, Marchetti M, López-Iglesias C, Peters PJ, Roos WH, Wuite GJL. Multilamellar nanovesicles show distinct mechanical properties depending on their degree of lamellarity. NANOSCALE 2018; 10:5318-5324. [PMID: 29504612 DOI: 10.1039/c7nr09224e] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Small multilamellar vesicles may have benefits over unilamellar vesicles for drug delivery, such as an increased volume for hydrophobic drugs. In addition, their altered mechanical properties might be beneficial for cellular uptake. Here, we show how atomic force microscopy (AFM) can be used to detect and characterize multilamellar vesicles. We quantify the size of each break event occurring during AFM nanoindentations, which shows good agreement with the thickness of supported lipid bilayers. Analyzing the size and number of these events for individual vesicles allows us to distinguish between vesicles consisting of 1 up to 5 bilayers. We validate these results by comparison with correlative cryo-electron microscopy (cryo-EM) data at the vesicle population level. Finally, we quantify the vesicle geometry and mechanical properties, and show that with additional bilayers adherent vesicles are more spherical and stiffer. Surprisingly, at ∼20% stiffening for each additional bilayer, the vesicle stiffness scales only weakly with lamellarity. Our results show the potential of AFM for studying liposomal nanoparticles and suggest that small multilamellar vesicles may have beneficial mechanical properties for cellular uptake.
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Affiliation(s)
- Daan Vorselen
- Department of Physics and Astronomy and LaserLab, Vrije Universiteit, Amsterdam, 1081 HV, The Netherlands.
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220
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Fröhlich K, Hartzke D, Schmidt F, Eucker J, Gurlo A, Sittinger M, Ringe J. Delayed release of chemokine CCL25 with bioresorbable microparticles for mobilization of human mesenchymal stem cells. Acta Biomater 2018; 69:290-300. [PMID: 29408710 DOI: 10.1016/j.actbio.2018.01.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 01/07/2023]
Abstract
Chemokines are guiding cues for directional trafficking of mesenchymal stem cells (MSC) upon injury and local chemokine delivery at injury sites is an up-to-date strategy to potentiate and prolong recruitment of MSC. In this study we present the chemokine CCL25, also referred to as thymus-expressed chemokine, to mobilize human MSC along positive but not along negative gradients. We hence proceeded to design a biodegradable and injectable release device for CCL25 on the basis of poly(lactic-co-glycolic acid) (PLGA). The conducted studies had the objective to optimize PLGA microparticle fabrication by varying selected formulation parameters, such as polymer type, microparticle size and interior phase composition. We found that microparticles of DV,50∼75 µm and fabricated using end-capped polymers, BSA as carrier protein and vortex mixing to produce the primary emulsion yielded high chemokine loading and delayed CCL25 release. To determine bioactivity, we investigated CCL25 released during the microparticle erosion phase and showed that deacidification of the release medium was required to induce significant MSC mobilization. The designed PLGA microparticles represent an effective and convenient off-the-shelf delivery tool for the delayed release of CCL25. However, continuative in vivo proof-of-concept studies are required to demonstrate enhanced recruitment of MSC and/or therapeutical effects in response to CCL25 release microparticles. STATEMENT OF SIGNIFICANCE With the discovery of chemokines, particularly CXCL12, as stimulators of stem cell migration, the development of devices that release CXCL12 has proceeded quickly in the last few years. In this manuscript we introduce CCL25 as chemokine to induce mobilization of human MSC. This study proceeds to demonstrate how selection of key formulation parameters of CCL25 loading into PLGA microparticles exerts considerable influence on CCL25 release. This is important for a broad range of efforts in in situ tissue engineering where the candidate chemokine and the delivery device need to be selected carefully. The use of such a cell-free CCL25 release device may provide a new therapeutic option in regenerative medicine.
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Affiliation(s)
- Kristin Fröhlich
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Tissue Engineering Laboratory and Berlin-Brandenburg Center for Regenerative Therapies, Department of Rheumatology and Clinical Immunology, Charitéplatz 1, 10117 Berlin, Germany.
| | - David Hartzke
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Tissue Engineering Laboratory and Berlin-Brandenburg Center for Regenerative Therapies, Department of Rheumatology and Clinical Immunology, Charitéplatz 1, 10117 Berlin, Germany
| | - Franziska Schmidt
- Department of Materials Science and Technologies, Chair of Advanced Ceramic Materials, Technische Universität Berlin, Hardenbergstrasse 40, 10623 Berlin, Germany
| | - Jan Eucker
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Hematology and Oncology, Charitéplatz 1, 10117 Berlin, Germany
| | - Aleksander Gurlo
- Department of Materials Science and Technologies, Chair of Advanced Ceramic Materials, Technische Universität Berlin, Hardenbergstrasse 40, 10623 Berlin, Germany
| | - Michael Sittinger
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Tissue Engineering Laboratory and Berlin-Brandenburg Center for Regenerative Therapies, Department of Rheumatology and Clinical Immunology, Charitéplatz 1, 10117 Berlin, Germany
| | - Jochen Ringe
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Tissue Engineering Laboratory and Berlin-Brandenburg Center for Regenerative Therapies, Department of Rheumatology and Clinical Immunology, Charitéplatz 1, 10117 Berlin, Germany; Department of Materials Science and Technologies, Chair of Advanced Ceramic Materials, Technische Universität Berlin, Hardenbergstrasse 40, 10623 Berlin, Germany
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221
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Allen RP, Bolandparvaz A, Ma JA, Manickam VA, Lewis JS. Latent, Immunosuppressive Nature of Poly(lactic- co-glycolic acid) Microparticles. ACS Biomater Sci Eng 2018; 4:900-918. [PMID: 30555893 PMCID: PMC6290919 DOI: 10.1021/acsbiomaterials.7b00831] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Use of biomaterials to spatiotemporally control the activation of immune cells is at the forefront of biomedical engineering research. As more biomaterial strategies are employed for immunomodulation, understanding the immunogenicity of biodegradable materials and their byproducts is paramount in tailoring systems for immune activation or suppression. Poly(D,L-lactic-co-glycolic acid) (PLGA), one of the most commonly studied polymers in tissue engineering and drug delivery, has been previously described on one hand as an immune adjuvant, and on the other as a nonactivating material. In this study, the effect of PLGA microparticles (MPs) on the maturation status of murine bone marrow-derived dendritic cells (DCs), the primary initiators of adaptive immunity, was investigated to decipher the immunomodulatory properties of this biomaterial. Treatment of bone marrow-derived DCs from C57BL/6 mice with PLGA MPs led to a time dependent decrease in the maturation level of these cells, as quantified by decreased expression of the positive stimulatory molecules MHCII, CD80, and CD86 as well as the ability to resist maturation following challenge with lipopolysaccharide (LPS). Moreover, this immunosuppression was dependent on the molecular weight of the PLGA used to fabricate the MPs, as higher molecular weight polymers required longer incubation to produce comparable dampening of maturation molecules. These phenomena were correlated to an increase in lactic acid both intracellularly and extracellularly during DC/PLGA MP coculture, which is postulated to be the primary agent behind the observed immune inhibition. This hypothesis is supported by our results demonstrating that resistance to LPS stimulation may be due to the ability of PLGA MP-derived lactic acid to inhibit the phosphorylation of TAK1 and therefore prevent NF-κB activation. This work is significant as it begins to elucidate how PLGA, a prominent biomaterial with broad applications ranging from tissue engineering to pharmaceutics, could modulate the local immune environment and offers insight on engineering PLGA to exploit its evolving immunogenicity.
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Affiliation(s)
- Riley P. Allen
- Department of Biomedical Engineering, University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Amir Bolandparvaz
- Department of Biomedical Engineering, University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Jeffrey A. Ma
- Department of Biomedical Engineering, University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Vishal A. Manickam
- Department of Biomedical Engineering, University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Jamal S. Lewis
- Department of Biomedical Engineering, University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
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222
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Martínez-Jothar L, Doulkeridou S, Schiffelers RM, Sastre Torano J, Oliveira S, van Nostrum CF, Hennink WE. Insights into maleimide-thiol conjugation chemistry: Conditions for efficient surface functionalization of nanoparticles for receptor targeting. J Control Release 2018. [PMID: 29526739 DOI: 10.1016/j.jconrel.2018.03.002] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Maleimide-thiol chemistry is widely used for the design and preparation of ligand-decorated drug delivery systems such as poly(lactide-co-glycolide) (PLGA) based nanoparticles (NPs). While many publications on nanocarriers functionalized exploiting this strategy are available in the literature, the conditions at which this reaction takes place vary among publications. This paper presents a comprehensive study on the conjugation of the peptide cRGDfK and the nanobody 11A4 (both containing a free thiol group) to maleimide functionalized PLGA NPs by means of the maleimide-thiol click reaction. The influence of different parameters, such as the nanoparticles preparation method and storage conditions as well as the molar ratio of maleimide to ligand used for conjugation, on the reaction efficiency has been evaluated. The NPs were prepared by a single or double emulsion method using different types and concentrations of surfactants and stored at 4 or 20 °C before reaction with the targeting moieties. Several maleimide to ligand molar ratios and different reaction times were studied and the conjugation efficiency was determined by quantification of the not-bound ligand by liquid chromatography. The kind of emulsion used to prepare the NPs as well as the type and concentration of surfactant used had no effect on the conjugation efficiency. Reaction between the maleimide groups present in the NPs and cRGDfK was optimal at a maleimide to thiol molar ratio of 2:1, reaching a conjugation efficiency of 84 ± 4% after 30 min at room temperature in 10 mM HEPES pH 7.0. For 11A4 nanobody the optimal reaction efficiency, 58 ± 12%, was achieved after 2 h of incubation at room temperature in PBS pH 7.4 using a 5:1 maleimide to protein molar ratio. Storage of the NPs at 4 °C for 7 days prior to their exposure to the ligands resulted in approximately 10% decrease in the reactivity of maleimide in contrast to storage at 20 °C which led to almost 40% of the maleimide being unreactive after the same storage time. Our findings demonstrate that optimization of this reaction, particularly in terms of reactant ratios, can represent a significant increase in the conjugation efficiency and prevent considerable waste of resources.
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Affiliation(s)
- Lucía Martínez-Jothar
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands
| | - Sofia Doulkeridou
- Division of Cell Biology, Department of Biology, Utrecht University, Padualaan 8, Utrecht 3584, CH, The Netherlands
| | - Raymond M Schiffelers
- Clinical Chemistry and Haematology, University Medical Center Utrecht, Heidelberglaan 100, Utrecht 3584, CX, The Netherlands
| | - Javier Sastre Torano
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands
| | - Sabrina Oliveira
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands; Division of Cell Biology, Department of Biology, Utrecht University, Padualaan 8, Utrecht 3584, CH, The Netherlands
| | - Cornelus F van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584, CG, The Netherlands.
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223
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Bee SL, Hamid ZAA, Mariatti M, Yahaya BH, Lim K, Bee ST, Sin LT. Approaches to Improve Therapeutic Efficacy of Biodegradable PLA/PLGA Microspheres: A Review. POLYM REV 2018. [DOI: 10.1080/15583724.2018.1437547] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Soo-Ling Bee
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - Z. A. Abdul Hamid
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - M. Mariatti
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - B. H. Yahaya
- Regenerative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Penang, Malaysia
| | - Keemi Lim
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
| | - Soo-Tueen Bee
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang, Selangor, Malaysia
| | - Lee Tin Sin
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang, Selangor, Malaysia
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224
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Zuidema JM, Kumeria T, Kim D, Kang J, Wang J, Hollett G, Zhang X, Roberts DS, Chan N, Dowling C, Blanco-Suarez E, Allen NJ, Tuszynski MH, Sailor MJ. Oriented Nanofibrous Polymer Scaffolds Containing Protein-Loaded Porous Silicon Generated by Spray Nebulization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706785. [PMID: 29363828 PMCID: PMC6475500 DOI: 10.1002/adma.201706785] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/13/2017] [Indexed: 06/07/2023]
Abstract
Oriented composite nanofibers consisting of porous silicon nanoparticles (pSiNPs) embedded in a polycaprolactone or poly(lactide-co-glycolide) matrix are prepared by spray nebulization from chloroform solutions using an airbrush. The nanofibers can be oriented by an appropriate positioning of the airbrush nozzle, and they can direct growth of neurites from rat dorsal root ganglion neurons. When loaded with the model protein lysozyme, the pSiNPs allow the generation of nanofiber scaffolds that carry and deliver the protein under physiologic conditions (phosphate-buffered saline (PBS), at 37 °C) for up to 60 d, retaining 75% of the enzymatic activity over this time period. The mass loading of protein in the pSiNPs is 36%, and in the resulting polymer/pSiNP scaffolds it is 3.6%. The use of pSiNPs that display intrinsic photoluminescence (from the quantum-confined Si nanostructure) allows the polymer/pSiNP composites to be definitively identified and tracked by time-gated photoluminescence imaging. The remarkable ability of the pSiNPs to protect the protein payload from denaturation, both during processing and for the duration of the long-term aqueous release study, establishes a model for the generation of biodegradable nanofiber scaffolds that can load and deliver sensitive biologics.
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Affiliation(s)
- Jonathan M. Zuidema
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA), School of Pharmacy, University of Queensland, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia
| | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul 02447, Republic of Korea
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Joanna Wang
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Geoffrey Hollett
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Xuan Zhang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - David S. Roberts
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Nicole Chan
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Cari Dowling
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Elena Blanco-Suarez
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Nicola J. Allen
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Mark H. Tuszynski
- Veterans Administration Medical Center, 3350 La Jolla Village Drive, San Diego, CA, 92161 (USA), Department of Neurosciences, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093 (USA)
| | - Michael J. Sailor
- Department of Chemistry and BiochemistryUniversity of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
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225
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Pérez-Mas L, Martín-Molina A, Quesada-Pérez M, Moncho-Jordá A. Maximizing the absorption of small cosolutes inside neutral hydrogels: steric exclusion versus hydrophobic adhesion. Phys Chem Chem Phys 2018; 20:2814-2825. [PMID: 29323684 DOI: 10.1039/c7cp07679g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this work the equilibrium absorption of nanometric cosolutes (which could represent drugs, reactants, small globular proteins and other kind of biomacromolecules) inside neutral hydrogels is studied. We specially focus on exploring, for different swelling states, the competition between the steric exclusion induced by the cross-linked polymer network constituting the hydrogel, and the solvent-induced short-range hydrophobic attraction between the polymer chains and the cosolute particle. For this purpose, the cosolute partition coefficient is calculated by means of coarse-grained grand canonical Monte Carlo simulations, and the results are compared to theoretical predictions based on the calculation of the excluded and binding volume around the polymer chains. For small hydrophobic attractions or large cosolute sizes, the steric repulsion dominates, and the partition coefficient decreases monotonically with the polymer volume fraction, ϕm. However, for large enough hydrophobic attraction strength, the interplay between hydrophobic adhesion and the steric exclusion leads to a maximum in the partition coefficient at certain intermediate polymer density. Good qualitative and quantitative agreement is achieved between simulation results and theoretical predictions in the limit of small ϕm, pointing out the importance of geometrical aspects of the cross-linked polymer network, even for hydrogels in the swollen state. In addition, the theory is able to predict analytically the onset of the maximum formation in terms of the details of the cosolute-monomer pair interaction, in good agreement with simulations too. Finally, the effect of the many-body attractions between the cosolute and multiple polymer chains is quantified. The results clearly show that these many-body attractions play a very relevant role determining the cosolute binding, enhancing its absorption in more than one order of magnitude.
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Affiliation(s)
- Luis Pérez-Mas
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva S/N, 18001 Granada, Spain
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226
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Maudens P, Seemayer CA, Thauvin C, Gabay C, Jordan O, Allémann E. Nanocrystal-Polymer Particles: Extended Delivery Carriers for Osteoarthritis Treatment. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:1703108. [PMID: 29327460 DOI: 10.1002/smll.201703108] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/22/2017] [Indexed: 06/07/2023]
Abstract
An efficient treatment for osteoarthritis (OA) can benefit from the local release of a high therapeutic dose over an extended period of time. Such a treatment will minimize systemic side effects and avoid the inconvenience of frequent injections. To this aim, nanocrystal-polymer particles (NPPs) are developed by combining the advantages of nanotechnology and microparticles. Nanocrystals are produced by wet milling kartogenin (KGN), which is known to promote chondrogenesis and to foster chondroprotection. A fluorescent biodegradable polymer is synthesized for intravital particle tracking. Polymer microparticles with 320 nm embedded KGN nanocrystals (KGN-NPPs) show a high drug loading of 31.5% (w/w) and an extended drug release of 62% over 3 months. In vitro, these particles do not alter mitochondrial activity in cultured human OA synoviocytes. In vivo, KGN-NPPs demonstrate higher bioactivity than a KGN solution in a murine mechanistic OA model based on histological assessment (Osteoarthritis Research Society International score), epiphyseal thickness (microcomputed tomography), OA biomarkers (e.g., vascular endothelial growth factor, Adamts5), and prolonged intra-articular persistence (fluorescence analysis). This work provides proof-of-concept of a novel and innovative extended drug delivery system with the potential to treat human OA.
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Affiliation(s)
- Pierre Maudens
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CH-1211, Geneva 4, Switzerland
| | | | - Cédric Thauvin
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CH-1211, Geneva 4, Switzerland
| | - Cem Gabay
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospital and Department of Pathology and Immunology, School of Medicine, University of Geneva, CH-1211, Geneva 4, Switzerland
| | - Olivier Jordan
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CH-1211, Geneva 4, Switzerland
| | - Eric Allémann
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CH-1211, Geneva 4, Switzerland
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Nanoparticulate delivery systems for alkyl gallates: Influence of the elaboration process on particle characteristics, drug encapsulation and in-vitro release. Colloids Surf B Biointerfaces 2018; 162:351-361. [DOI: 10.1016/j.colsurfb.2017.11.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 11/18/2017] [Accepted: 11/20/2017] [Indexed: 01/03/2023]
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228
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Pereira MC, Oliveira DA, Hill LE, Zambiazi RC, Borges CD, Vizzotto M, Mertens-Talcott S, Talcott S, Gomes CL. Effect of nanoencapsulation using PLGA on antioxidant and antimicrobial activities of guabiroba fruit phenolic extract. Food Chem 2018; 240:396-404. [DOI: 10.1016/j.foodchem.2017.07.144] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 07/05/2017] [Accepted: 07/26/2017] [Indexed: 12/11/2022]
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229
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Garner J, Skidmore S, Park H, Park K, Choi S, Wang Y. Beyond Q1/Q2: The Impact of Manufacturing Conditions and Test Methods on Drug Release From PLGA-Based Microparticle Depot Formulations. J Pharm Sci 2018; 107:353-361. [DOI: 10.1016/j.xphs.2017.10.027] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/28/2017] [Accepted: 10/17/2017] [Indexed: 01/05/2023]
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230
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Wang L, Yao J, Zhang X, Zhang Y, Xu C, Lee RJ, Yu G, Yu B, Teng L. Delivery of paclitaxel using nanoparticles composed of poly(ethylene oxide)-b-poly(butylene oxide) (PEO-PBO). Colloids Surf B Biointerfaces 2018; 161:464-470. [DOI: 10.1016/j.colsurfb.2017.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 11/04/2017] [Accepted: 11/06/2017] [Indexed: 02/05/2023]
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231
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Barbosa JAP, Franco ES, Silva CVNS, Bezerra TO, Santana MAN, Júnior CHRC, Silva TG, Santos NPS, Maia MBS. Poly- ε-Caprolactone Microsphere Polymers Containing Usnic Acid: Acute Toxicity and Anti-Inflammatory Activity. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2017; 2017:7392891. [PMID: 29348773 PMCID: PMC5733973 DOI: 10.1155/2017/7392891] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 10/09/2017] [Indexed: 11/17/2022]
Abstract
Usnic acid (UA) has been studied by its pharmacological properties; however, it presents moderate toxicity, low solubility, and absorption by biological membranes. The aim of this study was to develop poly-ε-caprolactone microsphere polymers containing UA (UA-micro) and evaluate their acute toxicity and anti-inflammatory activity. The microspheres were prepared by multiple emulsion technique (water/oil/water) and characterized by the encapsulation efficiency, particle size, polydispersity index, and zeta potential. The acute toxicity of UA and UA-micro (25-50 mg/kg; p.o.) was evaluated in mice. The anti-inflammatory activity of UA and UA-micro was evaluated by subcutaneous air pouch and carrageenan-induced paw edema in rat, with measurement of inflammatory cytokines and MPO levels. The UA presented encapsulation efficiency of 97.72%, particle size of 13.54 micrometers, polydispersity index of 2.36, and zeta potential of 44.5 ± 2.95 mV. The UA-micro presented lower acute toxicity (LD50 value up to 2000 mg/kg; p.o.) when compared to UA. UA-micro and UA (25 mg/kg) significantly reduced paw volume and decreased MPO levels, whereas only UA-micro (50 mg/kg) reduced significantly IL-1β, TNF-α, and NO levels in inflammatory exudate. These results suggest that controlled release systems, as microspheres, can be a promising alternative to reduce the toxicity of UA, making it a viable compound for inflammation therapy.
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Affiliation(s)
| | - Eryvelton S. Franco
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil
| | - Camilla V. N. S. Silva
- Department of Pharmaceutical Sciences, Federal University of Pernambuco, Recife, PE, Brazil
| | - Tatiane O. Bezerra
- Department of Antibiotics, Federal University of Pernambuco, Recife, PE, Brazil
| | | | | | - Teresinha G. Silva
- Department of Antibiotics, Federal University of Pernambuco, Recife, PE, Brazil
| | - Noemia P. S. Santos
- Laboratory of Biotechnology and Pharmaceuticals, Academic Center of Vitória, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Maria B. S. Maia
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil
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232
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Schultze E, Coradini K, dos Santos Chaves P, da Silva LP, Buss J, Guterres SS, Collares T, Beck RCR, Pohlmann AR, Seixas FK. Drug-loaded nanoemulsion as positive control is an alternative to DMSO solutions for in vitro evaluation of curcumin delivery to MCF-7 cells. Pharmacol Rep 2017; 69:1408-1412. [DOI: 10.1016/j.pharep.2017.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 05/04/2017] [Accepted: 05/09/2017] [Indexed: 10/19/2022]
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233
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Ratay ML, Bellotti E, Gottardi R, Little SR. Modern Therapeutic Approaches for Noninfectious Ocular Diseases Involving Inflammation. Adv Healthc Mater 2017; 6:10.1002/adhm.201700733. [PMID: 29034584 PMCID: PMC5915344 DOI: 10.1002/adhm.201700733] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/25/2017] [Indexed: 12/12/2022]
Abstract
Dry eye disease, age-related macular degeneration, and uveitis are ocular diseases that significantly affect the quality of life of millions of people each year. In these diseases, the action of chemokines, proinflammatory cytokines, and immune cells drives a local inflammatory response that results in ocular tissue damage. Multiple therapeutic strategies are developed to either address the symptoms or abate the underlying cause of these diseases. Herein, the challenges to deliver drugs to the relevant location in the eye for each of these diseases are reviewed along with current and innovative therapeutic approaches that attempt to restore homeostasis within the ocular microenvironment.
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Affiliation(s)
- Michelle L. Ratay
- Department of Bioengineering, University of Pittsburgh, 427 Benedum Hall 3700 O’Hara Street Pittsburgh, Pa 15261
| | - Elena Bellotti
- Department of Chemical Engineering, University of Pittsburgh, 427 Benedum Hall 3700 O’Hara Street Pittsburgh, Pa 15261
| | - Riccardo Gottardi
- Department of Chemical Engineering, Department of Orthopedic Surgery, Ri.MED Foundation, 427 Benedum Hall 3700 O’Hara Street Pittsburgh, Pa 15261
| | - Steven R. Little
- Department of Chemical Engineering, Department of Bioengineering, Department of Ophthalmology, Department of Immunology, Department of Pharmaceutical Sciences, The McGowan Institute for Regenerative Medicine, 940 Benedum Hall 3700 O’Hara Street Pittsburgh Pa 15261
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234
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Nieto K, Pei P, Wang D, Mallery SR, Schwendeman SP. In vivo controlled release of fenretinide from long-acting release depots for chemoprevention of oral squamous cell carcinoma recurrence. Int J Pharm 2017; 538:48-56. [PMID: 29170116 DOI: 10.1016/j.ijpharm.2017.11.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 10/17/2017] [Accepted: 11/19/2017] [Indexed: 10/18/2022]
Abstract
Local, long-acting release fenretinide (4HPR) millicylindrical implants were prepared and evaluated for their release kinetics in vivo and their ability to suppress oral cancer tumor explant growth. Poly(lactic-co-glycolic acid)(PLGA) implants were prepared as a function of drug loading and the presence of various excipients (pore-formers, solubilizers, crystallization inhibitors) to enhance release of the insoluble 4HPR. Release kinetics and bioerosion of PLGA were monitored both in vitro in a PBS/Tween 80 buffer and in vivo by recovery of the drug remaining at the injection site. 4HPR was released from PLGA implants much slower in vivo than in the drug solubilizing media in vitro, with a 3-week lag phase and continuous release of >2 months, but showed some release enhancement by addition of solubilizers. Water-soluble PVA/sucrose implants for release of 4HPR served to determine if drug dissolution provided suitable controlled release without the PLGA, and this formulation showed continuous drug release over 6 weeks in vivo. Placement of PLGA-4HPR implants adjacent to oral cancer tumor murine xenografts showed inhibition of tumor growth relative to sham implants, indicating the potential for the local 4HPR delivery approach to be useful for oral cancer chemoprevention.
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Affiliation(s)
- Kari Nieto
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI, 48109, United States.
| | - Ping Pei
- Division of Oral Maxillofacial Pathology & Radiology Ohio State University, 305 W. 12thAve, Columbus, OH, 43210, United States.
| | - Daren Wang
- Division of Oral Maxillofacial Pathology & Radiology Ohio State University, 305 W. 12thAve, Columbus, OH, 43210, United States.
| | - Susan R Mallery
- Division of Oral Maxillofacial Pathology & Radiology Ohio State University, 305 W. 12thAve, Columbus, OH, 43210, United States.
| | - Steven P Schwendeman
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI, 48109, United States; Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI, 48109, United States.
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235
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Kim H, Kim S, Sah H. Solvent hydrolysis rate determines critical quality attributes of PLGA microspheres prepared using non-volatile green solvent. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 29:35-56. [DOI: 10.1080/09205063.2017.1398993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- H. Kim
- College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea
| | - S. Kim
- College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea
| | - H. Sah
- College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea
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236
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Oliveira D, Mezzomo N, Gomes C, Ferreira S. Encapsulation of passion fruit seed oil by means of supercritical antisolvent process. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2017.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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237
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Zhang L, Parison A, He Y. Co-flowing of partially miscible liquids for the generation of monodisperse microparticles. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.08.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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238
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Furtmann B, Tang J, Kramer S, Eickner T, Luderer F, Fricker G, Gomez A, Heemskerk B, Jähn PS. Electrospray Synthesis of Poly(lactide-co-glycolide) Nanoparticles Encapsulating Peptides to Enhance Proliferation of Antigen-Specific CD8+ T Cells. J Pharm Sci 2017; 106:3316-3327. [DOI: 10.1016/j.xphs.2017.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 05/31/2017] [Accepted: 06/08/2017] [Indexed: 12/22/2022]
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239
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Costa MP, Feitosa ACS, Oliveira FCE, Cavalcanti BC, Dias GG, Caetano EWS, Sales FAM, Freire VN, Di Fiore S, Fischer R, Ladeira LO, da Silva Júnior EN, Pessoa C. Encapsulation of nor-β-lapachone into poly(d,l)-lactide- co-glycolide (PLGA) microcapsules: full characterization, computational details and cytotoxic activity against human cancer cell lines. MEDCHEMCOMM 2017; 8:1993-2002. [PMID: 30108718 PMCID: PMC6071939 DOI: 10.1039/c7md00196g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 09/06/2017] [Indexed: 11/21/2022]
Abstract
In this work, we characterize nor-β-lapachone-loaded (NβL-loaded) microcapsules prepared using an emulsification/solvent extraction technique. Features such as surface morphology, particle size distribution, zeta potential, optical absorption, Raman and Fourier transform infrared spectra, thermal analysis data, drug encapsulation efficiency, drug release kinetics and in vitro cytotoxicity were studied. Spherical microcapsules with a size of 1.03 ± 0.46 μm were produced with an encapsulation efficiency of approximately 19%. Quantum DFT calculations were also performed to estimate typical interaction energies between a single nor-β-lapachone molecule and the surface of the microparticles. The NβL-loaded PLGA microcapsules exhibited a pronounced initial burst release. After the in vitro treatment with NβL-loaded microcapsules, a clear phagocytosis of the spheres was observed in a few minutes. The cytotoxic activity against a set of cancer cell lines was investigated.
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Affiliation(s)
- Marcília P Costa
- Pharmacy Course , Federal University of Piauí , 64049-550 Teresina , PI , Brazil
| | - Anderson C S Feitosa
- Department of Physiology and Pharmacology , Federal University of Ceará , 60430-270 Fortaleza , CE , Brazil .
| | - Fátima C E Oliveira
- Department of Physiology and Pharmacology , Federal University of Ceará , 60430-270 Fortaleza , CE , Brazil .
| | - Bruno C Cavalcanti
- Department of Physiology and Pharmacology , Federal University of Ceará , 60430-270 Fortaleza , CE , Brazil .
| | - Gleiston G Dias
- Institute of Exact Sciences , Department of Chemistry , Federal University of Minas Gerais , Belo Horizonte , 31270-901 , MG , Brazil . ; Tel: +55 31 34095720
| | - Ewerton W S Caetano
- Department of Secondary School and Teachers College , Federal Institute of Ceará , 60040-531 Fortaleza , CE , Brazil
- Federal Institute of Ceará , 63503-790 Iguatu , CE , Brazil
| | - Francisco A M Sales
- Department of Secondary School and Teachers College , Federal Institute of Ceará , 60040-531 Fortaleza , CE , Brazil
- Federal Institute of Ceará , 63503-790 Iguatu , CE , Brazil
| | - Valder N Freire
- Department of Physics , Federal University of Ceará , 60455-760 Fortaleza , CE , Brazil
| | - Stefano Di Fiore
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME , 52074 , Aachen , Germany
| | - Rainer Fischer
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME , 52074 , Aachen , Germany
- Institute for Molecular Biotechnology , RWTH Aachen University , 52074 Aachen , Germany
| | - Luiz O Ladeira
- Institute of Exact Sciences , Department of Physics , Federal University of Minas Gerais , Belo Horizonte , 31270-901 , MG , Brazil
| | - Eufrânio N da Silva Júnior
- Institute of Exact Sciences , Department of Chemistry , Federal University of Minas Gerais , Belo Horizonte , 31270-901 , MG , Brazil . ; Tel: +55 31 34095720
| | - Claudia Pessoa
- Department of Physiology and Pharmacology , Federal University of Ceará , 60430-270 Fortaleza , CE , Brazil .
- Oswaldo Cruz Foundation (Fiocruz) , 60180-900 Fortaleza , CE , Brazil
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240
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Fan YL, Hou HW, Tay HM, Guo WM, Berggren PO, Loo SCJ. Preservation of Anticancer and Immunosuppressive Properties of Rapamycin Achieved Through Controlled Releasing Particles. AAPS PharmSciTech 2017; 18:2648-2657. [PMID: 28251512 DOI: 10.1208/s12249-017-0745-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 02/14/2017] [Indexed: 12/24/2022] Open
Abstract
Rapamycin is commonly used in chemotherapy and posttransplantation rejection suppression, where sustained release is preferred. Conventionally, rapamycin has to be administered in excess due to its poor solubility, and this often leads to cytotoxicity and undesirable side effects. In addition, rapamycin has been shown to be hydrolytically unstable, losing its bioactivity within a few hours. The use of drug delivery systems is hypothesized to preserve the bioactivity of rapamycin, while providing controlled release of this otherwise potent drug. This paper reports on the use of microparticles (MP) as a means to tune and sustain the delivery of bioactive rapamycin for up to 30 days. Rapamycin was encapsulated (100% efficiency) in poly(lactic-co-glycolic acid) (PLGA), polycaprolactone (PCL), or a mixture of both via an emulsion method. The use of different polymer types and mixture was shown to achieve a variety of release kinetics and profile. Released rapamycin was subsequently evaluated against breast cancer cell (MCF-7) and human lymphocyte cell (Jurkat). Inhibition of cell proliferation was in good agreement with in vitro release profiles, which confirmed the intact bioactivity of rapamycin. For Jurkat cells, the suppression of cell growth was proven to be effective up to 20 days, a duration significantly longer than free rapamycin. Taken together, these results demonstrate the ability to tune, sustain, and preserve the bioactivity of rapamycin using MP formulations. The sustained delivery of rapamycin could lead to better therapeutic effects than bolus dosage, at the same time improving patient compliance due to its long-acting duration.
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241
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Silk fibroin-coated PLGA dimpled microspheres for retarded release of simvastatin. Colloids Surf B Biointerfaces 2017; 158:112-118. [DOI: 10.1016/j.colsurfb.2017.06.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/05/2017] [Accepted: 06/22/2017] [Indexed: 12/30/2022]
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242
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Role of clove oil in solvent exchange-induced doxycycline hyclate-loaded Eudragit RS in situ forming gel. Asian J Pharm Sci 2017; 13:131-142. [PMID: 32104386 PMCID: PMC7032165 DOI: 10.1016/j.ajps.2017.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 08/21/2017] [Accepted: 09/19/2017] [Indexed: 01/09/2023] Open
Abstract
Role of clove oil (CO) in doxycycline hyclate (DH)-loaded Eudragit RS (ERS) in situ forming gel (ISG) was investigated. CO could solubilize ERS and increase the viscosity of ISG and also minimize DH burst release with sustainable DH release. ISGs comprising CO could expel through the 27-gauge needle and transform into matrix depot in simulated crevicular fluid. Antimicrobial activities against all test bacterias were increased when increasing CO and N-methyl pyrrolidone (NMP) ratio. DH-loaded ERS ISG comprising CO could be used as a local drug delivery system for periodontitis treatment.
Solvent exchange induced in situ forming gel (ISG) is the promising drug delivery system for periodontitis treatment owing to the prospect of maintaining an effective high drug level in the gingival crevicular fluid. In the present study, the influence of clove oil (CO) on the characteristics of doxycycline hyclate (DH)-loaded ISG comprising Eudragit RS (ERS) was investigated including viscosity/rheology, syringeability, in vitro gel formation/drug release, matrix formation/solvent diffusion and antimicrobial activities. CO could dissolve ERS and increase the viscosity of ISG and its hydrophobicity could also retard the diffusion of solvent and hinder the drug diffusion; thus, the minimization of burst effect and sustained drug release were achieved effectively. All the prepared ISGs comprising CO could expel through the 27-gauge needle for administration by injection and transform into matrix depot after exposure to the simulated gingival crevicular fluid. The antimicrobial activities against Staphylococcus aureus, Escherichia coli, Streptococcus mutans and Porphyromonas gingivalis were increased when the ratio of CO and N-methyl pyrrolidone (NMP) was decreased from 1:1 to 1:10 owing to higher diffusion of DH except that for C. albicans was increased as CO amount was higher. Therefore, CO could minimize the burst while prolonging the drug release of DH-loaded ERS ISG for use as a local drug delivery system for periodontitis treatment.
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243
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Zhuang J, Fang RH, Zhang L. Preparation of particulate polymeric therapeutics for medical applications. SMALL METHODS 2017; 1:1700147. [PMID: 30310860 PMCID: PMC6176868 DOI: 10.1002/smtd.201700147] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Particulate therapeutics fabricated from polymeric materials have become increasingly popular over the past several decades. Generally, polymeric systems are easy to synthesize and have tunable parameters, giving them significant potential for wide use in the clinic. They come in many different forms, including as nanoparticles, microparticles, and colloidal gels. In this review, we discuss the current preparation methods for each type of platform, as well as some representative applications. To achieve enhanced performance, lipid coatings and other surface modification techniques for introducing additional functionality are also mentioned. We hope that, by outlining the various methods and techniques for their preparation, it will be possible to provide insights into the utility of these polymeric platforms and further encourage their development for biomedical applications.
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Affiliation(s)
- Jia Zhuang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Ronnie H Fang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Liangfang Zhang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
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244
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A New Level A Type IVIVC for the Rational Design of Clinical Trials Toward Regulatory Approval of Generic Polymeric Long-Acting Injectables. Clin Pharmacokinet 2017; 55:1179-1190. [PMID: 27349905 DOI: 10.1007/s40262-016-0388-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chronic neuropsychiatric disorders and diabetes mellitus affect millions of patients and require long-term supervision and expensive medical care. Although repeated drug administration can help manage these diseases, relapses and re-hospitalization owing to patient non-adherence and reduced therapeutic efficacy remain challenging. In response, long-acting injectables, which provide sustained drug release over longer periods at concentrations close to therapeutic ranges, have been proposed. Recent advancements include polymeric long-acting injectables (pLAIs), in which the active pharmaceutical ingredient (API) is encapsulated within U.S. Food and Drug Administration (FDA)-approved biocompatible polymers, such as poly(lactic-co-glycolic acid), or PLGA. Despite significant progress and development in the global pLAI market, FDA guidance for the approval of complex drug products, such as generic pLAIs, is not clearly defined. Although in vitro to in vivo correlation (IVIVC) can facilitate the identification of critical quality attributes (CQAs), drug formulations, and in vitro test platforms for evaluating drug performance in vivo, the application of IVIVC in order to shortlist time- and resource-intensive clinical trials for generic pLAIs has not been reported. Here, we propose a new Level A Type IVIVC that directly correlates the in vitro outcomes, such as drug dissolution, of candidate generic formulations with the clinical characteristics, such as drug absorption, of a reference listed drug (RLD), to help identify the specific generic pLAI formulations with clinical absorptions that are likely to be similar to that of the RLD, thereby reducing the number of clinical trials required for evaluation of clinical bioequivalence (BE). Therefore, the scope of the proposed method is intended only for the rational design of clinical trials, i.e., to shortlist the specific pLAI generic formulations for clinical BE evaluation, and not necessarily to analyze drug performances (i.e., drug safety and effectiveness) in the shortlisted clinical trials or post-approval. Once validated, this method will be of great value to developers of generic pLAIs and regulatory bodies to accelerate their approval of these generic pLAIs.
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245
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Wang Q, Barry MA, Seid CA, Hudspeth EM, McAtee CP, Heffernan MJ. 3M-052 as an adjuvant for a PLGA microparticle-based Leishmania donovani recombinant protein vaccine. J Biomed Mater Res B Appl Biomater 2017; 106:1587-1594. [PMID: 28804955 DOI: 10.1002/jbm.b.33965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 07/07/2017] [Accepted: 07/21/2017] [Indexed: 02/02/2023]
Abstract
It is believed that an effective vaccine against leishmaniasis will require a T helper type 1 (TH 1) immune response. In this study, we investigated the adjuvanticity of the Toll-like receptor (TLR) 7/8 agonist 3M-052 in combination with the Leishmania donovani 36-kDa nucleoside hydrolase recombinant protein antigen (NH36). NH36 and 3M-052 were encapsulated in separate batches of poly(lactic-co-glycolic acid) (PLGA) microparticles (MPs). The loading efficiency for NH36 was 83% and for 3M-052 was above 95%. In vitro stimulation of bone marrow-derived dendritic cells, measured by IL-12 secretion, demonstrated that 3M-052 (free or MP-formulated) had a concentration-dependent immunostimulatory effect with an optimum concentration of 2 µg/mL. In immunogenicity studies in BALB/c mice, MP-formulated NH36 and 3M-052 elicited the highest serum titers of TH 1-associated IgG2a and IgG2b antibodies and the highest frequency of IFNγ-producing splenocytes. No dose dependency was observed among MP/NH36/3M-052 groups over a dose range of 4-60 µg 3M-052 per injection. The ability of MP-formulated NH36 and 3M-052 to elicit a TH 1-biased immune response indicates the potential for PLGA MP-formulated 3M-052 to be used as an adjuvant for leishmaniasis vaccines. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1587-1594, 2018.
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Affiliation(s)
- Qian Wang
- Department of Pediatrics (Section of Tropical Medicine), National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas.,Texas Children's Hospital Center for Vaccine Development, Houston, Texas
| | - Meagan A Barry
- Department of Pediatrics (Section of Tropical Medicine), National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas.,Texas Children's Hospital Center for Vaccine Development, Houston, Texas
| | - Christopher A Seid
- Department of Pediatrics (Section of Tropical Medicine), National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas.,Texas Children's Hospital Center for Vaccine Development, Houston, Texas
| | - Elissa M Hudspeth
- Department of Pediatrics (Section of Tropical Medicine), National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas.,Texas Children's Hospital Center for Vaccine Development, Houston, Texas
| | - C Patrick McAtee
- Department of Pediatrics (Section of Tropical Medicine), National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas.,Texas Children's Hospital Center for Vaccine Development, Houston, Texas
| | - Michael J Heffernan
- Department of Pediatrics (Section of Tropical Medicine), National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas.,Texas Children's Hospital Center for Vaccine Development, Houston, Texas
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246
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van Beers MM, Slooten C, Meulenaar J, Sediq AS, Verrijk R, Jiskoot W. Micro-Flow Imaging as a quantitative tool to assess size and agglomeration of PLGA microparticles. Eur J Pharm Biopharm 2017; 117:91-104. [DOI: 10.1016/j.ejpb.2017.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 04/05/2017] [Indexed: 01/03/2023]
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247
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Lee TY, Ku M, Kim B, Lee S, Yang J, Kim SH. Microfluidic Production of Biodegradable Microcapsules for Sustained Release of Hydrophilic Actives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700646. [PMID: 28558167 DOI: 10.1002/smll.201700646] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/13/2017] [Indexed: 06/07/2023]
Abstract
Biodegradable microcapsules with a large aqueous lumen and ultrathin membrane are microfluidically designed for sustained release of hydrophilic bioactives using water-in-oil-in-water double-emulsion drops as a template. As a shell phase, an organic solution of poly(lactic-co-glycolic acid) is used, which is consolidated to form a biodegradable membrane. The encapsulants stored in the lumen are released over a long period of time as the membranes degrade. The period can be controlled in a range of -three to five months at neutral pH condition by adjusting membrane thickness, providing highly sustained release and potentially enabling the programed release of multiple drugs. At acidic or basic condition, the degradation is accelerated, leading to the release in the period of approximately two months. As the membrane is semipermeable, the microcapsules respond to the osmotic pressure difference across the membrane. The microcapsules are inflated in hypotonic condition and deflated in hypertonic condition. Both conditions cause cracks on the membrane, resulting in the fast release of encapsulants in a day. The microcapsules implanted in mice also show sustained release, despite the period is decreased to a month. It is believed that the microcapsules are promising for the in vivo sustained release of drugs for high and long-term efficacy.
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Affiliation(s)
- Tae Yong Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Minhee Ku
- Department of Radiology, College of Medicine, Yonsei University, Seoul, 03722, South Korea
| | - Bomi Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Sangmin Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Jaemoon Yang
- Department of Radiology, College of Medicine, Yonsei University, Seoul, 03722, South Korea
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
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Thanki K, Zeng X, Justesen S, Tejlmann S, Falkenberg E, Van Driessche E, Mørck Nielsen H, Franzyk H, Foged C. Engineering of small interfering RNA-loaded lipidoid-poly(DL-lactic-co-glycolic acid) hybrid nanoparticles for highly efficient and safe gene silencing: A quality by design-based approach. Eur J Pharm Biopharm 2017; 120:22-33. [PMID: 28756280 DOI: 10.1016/j.ejpb.2017.07.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/19/2017] [Accepted: 07/25/2017] [Indexed: 01/29/2023]
Abstract
Safety and efficacy of therapeutics based on RNA interference, e.g., small interfering RNA (siRNA), are dependent on the optimal engineering of the delivery technology, which is used for intracellular delivery of siRNA to the cytosol of target cells. We investigated the hypothesis that commonly used and poorly tolerated cationic lipids might be replaced with more efficacious and safe lipidoids as the lipid component of siRNA-loaded lipid-polymer hybrid nanoparticles (LPNs) for achieving more efficient gene silencing at lower and safer doses. However, formulation design of such a complex formulation is highly challenging due to a strong interplay between several contributing factors. Hence, critical formulation variables, i.e. the lipidoid content and siRNA:lipidoid ratio, were initially identified, followed by a systematic quality-by-design approach to define the optimal operating space (OOS), eventually resulting in the identification of a robust, highly efficacious and safe formulation. A 17-run design of experiment with an I-optimal approach was performed to systematically assess the effect of selected variables on critical quality attributes (CQAs), i.e. physicochemical properties (hydrodynamic size, zeta potential, siRNA encapsulation/loading) and the biological performance (in vitro gene silencing and cell viability). Model fitting of the obtained data to construct predictive models revealed non-linear relationships for all CQAs, which can be readily overlooked in one-factor-at-a-time optimization approaches. The response surface methodology further enabled the identification of an OOS that met the desired quality target product profile. The optimized lipidoid-modified LPNs revealed more than 50-fold higher in vitro gene silencing at well-tolerated doses and approx. a twofold increase in siRNA loading as compared to reference LPNs modified with the commonly used cationic lipid dioleyltrimethylammonium propane (DOTAP). Thus, lipidoid-modified LPNs show highly promising prospects for efficient and safe intracellular delivery of siRNA.
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Affiliation(s)
- Kaushik Thanki
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Xianghui Zeng
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Sarah Justesen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark; Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 162, DK-2100 Copenhagen Ø, Denmark
| | - Sarah Tejlmann
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Emily Falkenberg
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Elize Van Driessche
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark; Department of Pharmaceutics, Laboratory of General Biochemistry and Physical Pharmacy, Ghent University Campus Heymans, Ottergemsesteenweg 460, 9000 Gent, Belgium
| | - Hanne Mørck Nielsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Henrik Franzyk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 162, DK-2100 Copenhagen Ø, Denmark
| | - Camilla Foged
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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249
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Guo Y, Yang Y, He L, Sun R, Pu C, Xie B, He H, Zhang Y, Yin T, Wang Y, Tang X. Injectable Sustained-Release Depots of PLGA Microspheres for Insoluble Drugs Prepared by hot-Melt Extrusion. Pharm Res 2017; 34:2211-2222. [PMID: 28741064 DOI: 10.1007/s11095-017-2228-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/03/2017] [Indexed: 11/29/2022]
Abstract
PURPOSE Progesterone (PRG) was selected as a model drug to develop a long-acting injection system for poorly water-soluble drugs. METHODS Microspheres with high density-low porosity were prepared by hot-melt extrusion (HME) combined with wet-milling as the representative formulation, and a microcrystal suspension was also studied as a comparison. The morphology, particle size and distribution, polymorphism, drug distribution, density and porosity were characterized by scanning electron microscopy, laser diffraction particle size analyzer, power X-ray diffraction and DSC respectively. The in vivo performance of the different formulations within 7 days after intramuscular injection was evaluated in male SD rats. RESULTS The drug-loading rate of the microspheres could be as high as 40%. The average initial burst release of the microspheres (PLGA lactide:glycolide = 75:25) was only 6.7% much lower than that of the microsuspension (25.7%) and a sustained release was exhibited for at least 7 days. The release mechanism was speculated to be as follows. The microspheres are a drug depot with drug microcrystals in the PLGA matrix which is a layer by layer honeycomb structure. CONCLUSIONS Microspheres prepared by HME combined with wet-milling could achieve a long-term sustained release effect as a novel long-acting formulation strategy.
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Affiliation(s)
- Yuting Guo
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Yunning Yang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Luying He
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Rong Sun
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Chenguang Pu
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Bin Xie
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Haibing He
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Yu Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
| | - Tian Yin
- School of Functional food and Wine, Shenyang Pharmaceutical University, Shenyang, China.
| | - Yanjiao Wang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China.
| | - Xing Tang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China
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250
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Xu J, Zhang S, Machado A, Lecommandoux S, Sandre O, Gu F, Colin A. Controllable Microfluidic Production of Drug-Loaded PLGA Nanoparticles Using Partially Water-Miscible Mixed Solvent Microdroplets as a Precursor. Sci Rep 2017; 7:4794. [PMID: 28684775 PMCID: PMC5500499 DOI: 10.1038/s41598-017-05184-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 05/25/2017] [Indexed: 11/22/2022] Open
Abstract
We present a versatile continuous microfluidic flow-focusing method for the production of Doxorubicin (DOX) or Tamoxifen (TAM)-loaded poly(D,L-lactic-co-glycolic acid) (PLGA) nanoparticles (NPs). We use a partially water-miscible solvent mixture (dimethyl sulfoxide DMSO+ dichloromethane DCM) as precursor drug/polymer solution for NPs nucleation. We extrude this partially water-miscible solution into an aqueous medium and synthesized uniform PLGA NPs with higher drug loading ability and longer sustained-release ability than conventional microfluidic or batch preparation methods. The size of NPs could be precisely tuned by changing the flow rate ratios, polymer concentration, and volume ratio of DCM to DMSO (VDCM/VDMSO) in the precursor emulsion. We investigated the mechanism of the formation of NPs and the effect of VDCM/VDMSO on drug release kinetics. Our work suggests that this original, rapid, facile, efficient and low-cost method is a promising technology for high throughput NP fabrication. For the two tested drugs, one hydrophilic (Doxorubicin) the other one hydrophobic (Tamoxifen), encapsulation efficiency (EE) as high as 88% and mass loading content (LC) higher than 25% were achieved. This new process could be extended as an efficient and large scale NP production method to benefit to fields like controlled drug release and nanomedicine.
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Affiliation(s)
- Jiang Xu
- Centre de Recherche Paul Pascal, CNRS, Univ. Bordeaux, 115 Avenue Schweitzer, 33600, Pessac, France
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
- CNRS, Solvay, LOF (UMR 5258), Univ. Bordeaux, F-33600, Pessac, France
| | - Shusheng Zhang
- CNRS, Univ. Bordeaux, Bordeaux-INP, Laboratoire de Chimie des Polymères Organiques (UMR5629), 16 Avenue Pey Berland, 33607, Pessac, France
| | - Anais Machado
- CNRS, Univ. Bordeaux, Bordeaux-INP, Laboratoire de Chimie des Polymères Organiques (UMR5629), 16 Avenue Pey Berland, 33607, Pessac, France
| | - Sébastien Lecommandoux
- CNRS, Univ. Bordeaux, Bordeaux-INP, Laboratoire de Chimie des Polymères Organiques (UMR5629), 16 Avenue Pey Berland, 33607, Pessac, France
| | - Olivier Sandre
- CNRS, Univ. Bordeaux, Bordeaux-INP, Laboratoire de Chimie des Polymères Organiques (UMR5629), 16 Avenue Pey Berland, 33607, Pessac, France
| | - Frank Gu
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
| | - Annie Colin
- Centre de Recherche Paul Pascal, CNRS, Univ. Bordeaux, 115 Avenue Schweitzer, 33600, Pessac, France.
- ESPCI Paris, PSL Research University, Sciences et Ingénierie de la matière Molle, CNRS(UMR 7615), 10, Rue Vauquelin, 75231, Paris Cedex 05, France.
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