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Yan C, Kim SR. Microencapsulation for Pharmaceutical Applications: A Review. ACS APPLIED BIO MATERIALS 2024; 7:692-710. [PMID: 38320297 DOI: 10.1021/acsabm.3c00776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
In order to improve bioavailability, stability, control release, and target delivery of active pharmaceutical ingredients (APIs), as well as to mask their bitter taste, to increase their efficacy, and to minimize their side effects, a variety of microencapsulation (including nanoencapsulation, particle size <100 nm) technologies have been widely used in the pharmaceutical industry. Commonly used microencapsulation technologies are emulsion, coacervation, extrusion, spray drying, freeze-drying, molecular inclusion, microbubbles and microsponge, fluidized bed coating, supercritical fluid encapsulation, electro spinning/spray, and polymerization. In this review, APIs are categorized by their molecular complexity: small APIs (compounds with low molecular weight, like Aspirin, Ibuprofen, and Cannabidiol), medium APIs (compounds with medium molecular weight like insulin, peptides, and nucleic acids), and living microorganisms (such as probiotics, bacteria, and bacteriophages). This article provides an overview of these microencapsulation technologies including their processes, matrix, and their recent applications in microencapsulation of APIs. Furthermore, the advantages and disadvantages of these common microencapsulation technologies in terms of improving the efficacy of APIs for pharmaceutical treatments are comprehensively analyzed. The objective is to summarize the most recent progresses on microencapsulation of APIs for enhancing their bioavailability, control release, target delivery, masking their bitter taste and stability, and thus increasing their efficacy and minimizing their side effects. At the end, future perspectives on microencapsulation for pharmaceutical applications are highlighted.
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Affiliation(s)
- Cuie Yan
- Division of Encapsulation, Blue California, Rancho Santa Margarita, California 92688, United States
| | - Sang-Ryoung Kim
- Division of Encapsulation, Blue California, Rancho Santa Margarita, California 92688, United States
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Kouhjani M, Jaafari MR, Kamali H, Abbasi A, Tafaghodi M, Mousavi Shaegh SA. Microfluidic-assisted preparation of PLGA nanoparticles loaded with insulin: a comparison with double emulsion solvent evaporation method. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:306-329. [PMID: 38100556 DOI: 10.1080/09205063.2023.2287247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 11/14/2023] [Indexed: 12/17/2023]
Abstract
Poly lactic-co-glycolic acid (PLGA) is an ideal polymer for the delivery of small and macromolecule drugs. Conventional preparation methods of PLGA nanoparticles (NPs) result in poor control over NPs properties. In this research, a microfluidic mixer was designed to produce insulin-loaded PLGA NPs with tuned properties. Importantly; aggregation of the NPs through the mixer was diminished due to the coaxial mixing of the precursors. The micromixer allowed for the production of NPs with small size and narrow size distribution compared to the double emulsion solvent evaporation (DESE) method. Furthermore, encapsulation efficiency and loading capacity indicated a significant increase in optimized NPs produced through the microfluidic method in comparison to DESE method. NPs prepared by the microfluidic method were able to achieve a more reduction of trans-epithelial electrical resistance values in the Caco-2 cells compared to those developed by the DESE technique that leads to greater paracellular permeation. Compatibility and interaction between components were evaluated by differential scanning calorimetry and fourier transform infrared analysis. Also, the effect of NPs on cell toxicity was investigated using MTT test. Numerical simulations were conducted to analyze the effect of mixing patterns on the properties of the NPs. It was revealed that by decreasing flow rate ratio, i.e. flow rate of the organic phase to the flow rate of the aqueous phase, mixing of the two streams increases. As an alternative to the DESE method, high flexibility in modulating hydrodynamic conditions of the microfluidic mixer allowed for nanoassembly of NPs with superior insulin encapsulation at smaller particle sizes.
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Affiliation(s)
- Maryam Kouhjani
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahmoud Reza Jaafari
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Biotechnology and Nanotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Kamali
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhossein Abbasi
- Laboratory of Microfluidics and Medical Microsystems, BuAli Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Orthopedic Research Center, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohsen Tafaghodi
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Nanotechnology and Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Ali Mousavi Shaegh
- Laboratory of Microfluidics and Medical Microsystems, BuAli Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Orthopedic Research Center, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Clinical Research Unit, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Molavi F, Barzegar-Jalali M, Hamishehkar H. Changing the daily injection of glatiramer acetate to a monthly long acting product through designing polyester-based polymeric microspheres. BIOIMPACTS : BI 2022; 12:501-513. [PMID: 36644544 PMCID: PMC9809140 DOI: 10.34172/bi.2022.23733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 10/04/2021] [Accepted: 10/20/2021] [Indexed: 11/06/2022]
Abstract
Introduction: Glatiramer acetate (GA) is a newly emerged therapeutic peptide to reduce the frequency of relapses in multiple sclerosis (MS). Despite its good performance in controlling MS, it is not widely used due to daily or biweekly subcutaneous injections due to rapid degradation and body clearance. Therefore, implant design with sustained release leads to prolonged biological effects by gradually increasing drug exposure and protecting GA from rapid local degradation. Methods: Different emulsion methods, PLGA type, surfactant concentration, drug/polymer ratio, drying processes, stirring method, and other variables in preliminary studies modified the final formulation. The release kinetics were studied through mechanistic kinetic models such as zero-order, Weibull, Higuchi, etc. In this study, all challenges for easy scale-up, methodological detail, and a simple, feasible setup in mass production were discussed. Results: The optimized formulation was obtained by 1:6 drug/PLGA, 0.5% w/w polyvinyl alcohol, and 0.75% w/w NaCl in the external aqueous phase, 1:10 continuous phase to dispersed phase ratio, and without any surfactant in the primary emulsion. The final freeze-dried particles presented a narrow distributed size of 1-10 µm with 7.29% ± 0.51 drug loading and zero-order release behavior with appropriate regression correlation (R2 98.7), complete release, and only 7.1% initial burst release. Conclusion: Therefore, to achieve improvement in patient compliance through better and longer efficacy, designing the parenteral sustained release microspheres (MPSs) of this immune modulator is a promising approach that should be considered.
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Affiliation(s)
- Fatima Molavi
- Biotechnology Research Center, Student Research Committee, Department of pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Barzegar-Jalali
- Biotechnology Research Center, Student Research Committee, Department of pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Hamishehkar
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
,Corresponding author: Hamed Hamishehkar,
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Memanishvili T, Monni E, Tatarishivili J, Lindvall O, Tsiskaridze A, Kokaia Z, Tornero D. Poly(ester amide) microspheres are efficient vehicles for long-term intracerebral growth factor delivery and improve functional recovery after stroke. Biomed Mater 2020; 15:065020. [DOI: 10.1088/1748-605x/aba4f6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Molavi F, Barzegar-Jalali M, Hamishehkar H. Polyester based polymeric nano and microparticles for pharmaceutical purposes: A review on formulation approaches. J Control Release 2020; 320:265-282. [DOI: 10.1016/j.jconrel.2020.01.028] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/15/2020] [Accepted: 01/17/2020] [Indexed: 12/18/2022]
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Jaswir I, Noviendri D, Taher M, Mohamed F, Octavianti F, Lestari W, Mukti AG, Nirwandar S, Hamad Almansori BB. Optimization and Formulation of Fucoxanthin-Loaded Microsphere (F-LM) Using Response Surface Methodology (RSM) and Analysis of Its Fucoxanthin Release Profile. Molecules 2019; 24:molecules24050947. [PMID: 30866561 PMCID: PMC6429396 DOI: 10.3390/molecules24050947] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/23/2019] [Accepted: 02/27/2019] [Indexed: 11/16/2022] Open
Abstract
Fucoxanthin has interesting anticancer activity, but is insoluble in water, hindering its use as a drug. Microencapsulation is used as a technique for improving drug delivery. This study aimed to formulate fucoxanthin-loaded microspheres (F-LM) for anticancer treatment of H1299 cancer cell lines and optimize particle size (PS) and encapsulation efficiency (EE). Using response surface methodology (RSM), a face centered central composite design (FCCCD) was designed with three factors: Polyvinylalcohol (PVA), poly(d,l-lactic-co-glycolic acid) (PLGA), and fucoxanthin concentration. F-LM was produced using a modified double-emulsion solvent evaporation method. The F-LM were characterized for release profile, release kinetics, and degradation pattern. Optimal F-LM PS and EE of 9.18 µm and 33.09%, respectively, with good surface morphology, were achieved from a 0.5% (w/v) PVA, 6.0% (w/v) PLGA, 200 µg/mL fucoxanthin formulation at a homogenization speed of 20,500 rpm. PVA concentration was the most significant factor (p < 0.05) affecting PS. Meanwhile, EE was significantly affected by interaction between the three factors: PVA, PLGA, and fucoxanthin. In vitro release curve showed fucoxanthin had a high burst release (38.3%) at the first hour, followed by a sustained release stage reaching (79.1%) within 2 months. Release kinetics followed a diffusion pattern predominantly controlled by the Higuchi model. Biodegradability studies based on surface morphology changes on the surface of the F-LM, show that morphology changed within the first hour, and F-LM completely degraded within 2 months. RSM under FCCCD design improved the difference between the lowest and highest responses, with good correlation between observed and predicted values for PS and EE of F-LM.
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Affiliation(s)
- Irwandi Jaswir
- International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Jalan Gombak, Kuala Lumpur 53100, Malaysia.
- Bioprocess and Molecular Engineering Research Unit (BPMERU), International Islamic University Malaysia (IIUM) Gombak, Kuala Lumpur 53100, Malaysia.
- Department of Pharmaceutical Technology, Universitas Ahmad Dahlan, Yogyakarta 55164, Indonesia.
| | - Dedi Noviendri
- Bioprocess and Molecular Engineering Research Unit (BPMERU), International Islamic University Malaysia (IIUM) Gombak, Kuala Lumpur 53100, Malaysia.
| | - Muhammad Taher
- Department of Pharmaceutical Technology, Faculty of Pharmacy, International Islamic University Malaysia Kuantan, Kuantan 25200, Malaysia.
| | - Farahidah Mohamed
- Department of Pharmaceutical Technology, Faculty of Pharmacy, International Islamic University Malaysia Kuantan, Kuantan 25200, Malaysia.
| | - Fitri Octavianti
- Department of Orthodontics, Faculty of Dentistry, Universiti Sains Islam Malaysia, Tower B, Persiaran MPAJ, Jalan Pandan Utama, Kuala Lumpur 55100, Malaysia.
| | - Widya Lestari
- International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Jalan Gombak, Kuala Lumpur 53100, Malaysia.
| | - Ali Ghufron Mukti
- Ministry of Research, Technology and Higher Education of Indonesia, Senayan, Jakarta Pusat 10340, Indonesia.
| | - Sapta Nirwandar
- Chairman, Indonesia Halal Lifestyle Foundation, Jakarta 10230, Indonesia.
| | - Bubaker B Hamad Almansori
- International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Jalan Gombak, Kuala Lumpur 53100, Malaysia.
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Lee PW, Pokorski JK. Poly(lactic-co-glycolic acid) devices: Production and applications for sustained protein delivery. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2018; 10:e1516. [PMID: 29536634 PMCID: PMC6136991 DOI: 10.1002/wnan.1516] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 01/30/2018] [Accepted: 02/14/2018] [Indexed: 12/12/2022]
Abstract
Injectable or implantable poly(lactic-co-glycolic acid) (PLGA) devices for the sustained delivery of proteins have been widely studied and utilized to overcome the necessity of repeated administrations for therapeutic proteins due to poor pharmacokinetic profiles of macromolecular therapies. These devices can come in the form of microparticles, implants, or patches depending on the disease state and route of administration. Furthermore, the release rate can be tuned from weeks to months by controlling the polymer composition, geometry of the device, or introducing additives during device fabrication. Slow-release devices have become a very powerful tool for modern medicine. Production of these devices has initially focused on emulsion-based methods, relying on phase separation to encapsulate proteins within polymeric microparticles. Process parameters and the effect of additives have been thoroughly researched to ensure protein stability during device manufacturing and to control the release profile. Continuous fluidic production methods have also been utilized to create protein-laden PLGA devices through spray drying and electrospray production. Thermal processing of PLGA with solid proteins is an emerging production method that allows for continuous, high-throughput manufacturing of PLGA/protein devices. Overall, polymeric materials for protein delivery remain an emerging field of research for the creation of single administration treatments for a wide variety of disease. This review describes, in detail, methods to make PLGA devices, comparing traditional emulsion-based methods to emerging methods to fabricate protein-laden devices. This article is categorized under: Biology-Inspired Nanomaterials > Protein and Virus-Based Structures Implantable Materials and Surgical Technologies > Nanomaterials and Implants Biology-Inspired Nanomaterials > Peptide-Based Structures.
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Affiliation(s)
- Parker W. Lee
- Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Jonathan K. Pokorski
- Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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Martins C, Araújo F, Gomes MJ, Fernandes C, Nunes R, Li W, Santos HA, Borges F, Sarmento B. Using microfluidic platforms to develop CNS-targeted polymeric nanoparticles for HIV therapy. Eur J Pharm Biopharm 2018; 138:111-124. [PMID: 29397261 DOI: 10.1016/j.ejpb.2018.01.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 01/18/2018] [Accepted: 01/24/2018] [Indexed: 12/26/2022]
Abstract
The human immunodeficiency virus (HIV) uses the brain as reservoir, which turns it as a promising target to fight this pathology. Nanoparticles (NPs) of poly(lactic-co-glycolic) acid (PLGA) are potential carriers of anti-HIV drugs to the brain, since most of these antiretrovirals, as efavirenz (EFV), cannot surpass the blood-brain barrier (BBB). Forasmuch as the conventional production methods lack precise control over the final properties of particles, microfluidics emerged as a prospective alternative. This study aimed at developing EFV-loaded PLGA NPs through a conventional and microfluidic method, targeted to the BBB, in order to treat HIV neuropathology. Compared to the conventional method, NPs produced through microfluidics presented reduced size (73 nm versus 133 nm), comparable polydispersity (around 0.090), less negative zeta-potential (-14.1 mV versus -28.0 mV), higher EFV association efficiency (80.7% versus 32.7%) and higher drug loading (10.8% versus 3.2%). The microfluidics-produced NPs also demonstrated a sustained in vitro EFV release (50% released within the first 24 h). NPs functionalization with a transferrin receptor-binding peptide, envisaging BBB targeting, proved to be effective concerning nuclear magnetic resonance analysis (δ = -0.008 ppm; δ = -0.017 ppm). NPs demonstrated to be safe to BBB endothelial and neuron cells (metabolic activity above 70%), as well as non-hemolytic (1-2% of hemolysis, no morphological alterations on erythrocytes). Finally, functionalized nanosystems were able to interact more efficiently with BBB cells, and permeability of EFV associated with NPs through a BBB in vitro model was around 1.3-fold higher than the free drug.
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Affiliation(s)
- Cláudia Martins
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; FEUP - Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - Francisca Araújo
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; ICBAS - Instituto Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Maria João Gomes
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; ICBAS - Instituto Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Carlos Fernandes
- CIQUP - Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Rute Nunes
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; ICBAS - Instituto Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Wei Li
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, FI-00014 Helsinki, Finland
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, FI-00014 Helsinki, Finland; HiLIFE - Helsinki Institute of Life Science, University of Helsinki, FI-00014 Helsinki, Finland
| | - Fernanda Borges
- CIQUP - Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Bruno Sarmento
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; CESPU - Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra 1317, 4585-116 Gandra, Portugal.
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Penta-block copolymer microspheres: Impact of polymer characteristics and process parameters on protein release. Int J Pharm 2018; 535:428-437. [DOI: 10.1016/j.ijpharm.2017.11.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/12/2022]
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Akbari V, Rezazadeh M, Minayian M, Amirian M, Moghadas A, Talebi A. Effect of freeze drying on stability, thermo-responsive characteristics, and in vivo wound healing of erythropoietin-loaded trimethyl chitosan/glycerophosphate hydrogel. Res Pharm Sci 2018; 13:476-483. [PMID: 30607145 PMCID: PMC6288991 DOI: 10.4103/1735-5362.245959] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Erythropoietin (EPO) was successfully incorporated into a bioadhesive thermosensitive hydrogel based on trimethyl chitosan (TMC)/β-glycerophosphate (GP) for prevention and treatment of oral mucositis in cancerous patients. The aim of the present study was to evaluate the effect of freeze drying on thermo-responsive property of the hydrogel and structural stability of the loaded protein. The freeze-dried EPO-loaded hydrogel were characterized using various methods. Gelation property by rheological analysis, EPO aggregation in formulations by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), protein secondary structure by far ultraviolet-circular dichroism (CD), and the antigenic activity of EPO with ELISA techniques. The healing effects of the freeze-dried formulation was also investigated in Sprague-Dawley rats with chemotherapy-induced mucositis and compared with freshly prepared mixture. Finally, the retention time of the gel in the oral cavity was assessed in healthy volunteers. SDS-PAGE, CD, and ELISA confirmed the stability of conformational structure of loaded and released EPO. Severity of mucositis was markedly reduced in animals treated with freeze-dried EPO hydrogel; whereas the group received normal saline did not show any significant healing. EPO salvia level was decreased rapidly following EPO solution compared to the gel application. Approximately, 40% of EPO was maintained on the buccal areas in patients receiving the hydrogel system after 30 min. Therefore, the TMC/GP could preserve EPO stability after freeze drying and has the potential in the treatment of oral mucositis and other oral or subcutaneous wounds.
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Affiliation(s)
- Vajihe Akbari
- Department of Pharmaceutical Biotechnology and Isfahan Pharmaceutical Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Mahboubeh Rezazadeh
- Department of Pharmaceutics and Novel Drug Delivery System Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Mohsen Minayian
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Marjan Amirian
- Department of Pharmaceutics and Novel Drug Delivery System Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Azadeh Moghadas
- Department of Clinical pharmacy, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Ardeshir Talebi
- Pathology Department, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
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Mardani S, Maghsoodi M, Ghanbarzadeh S, Nokhodchi A, Yaqoubi S, Hamishehkar H. Preparation and Characterization of Celecoxib Agglomerated Nanocrystals and Dry Powder Inhalation Formulations to Improve its Aerosolization Performance. PHARMACEUTICAL SCIENCES 2017. [DOI: 10.15171/ps.2017.41] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Zhang W, Gao Y, Yang N, Zhang H, Zhang F, Chen HQ, Meng J, Zhang SY, Li W. Sinomenine-loaded microcapsules fabricated by phase reversion emulsification-drying in liquid method: An evaluation of process parameters, characterization, and released properties. J BIOACT COMPAT POL 2017. [DOI: 10.1177/0883911517751159] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Sinomenine is a natural alkaloid with important biological activities (e.g. anti-cancer, anti-inflammatory, and anti-allergic). However, the unstability and short half-life absolutely limited its application to foods. Microencapsulation technology can offer a way to solve these issues. In this study, polylactic acid microcapsules loading sinomenine hydrochloride were fabricated by phase inversion emulsification-drying in liquid technique. The results showed that microcapsules had nice spherical shape, uniform particle size, and free flowing. The encapsulation efficiency was 89.2% and drug loading was 8.9% under the optimal conditions. In vitro release assays demonstrated that release of sinomenine from microcapsules was sustained and slow. Moreover, it was found that the sinomenine release fitted Fickian diffusion mechanism. The results of cytotoxicity study showed that sinomenine-loaded microcapsules were biocompatible. Sinomenine-loaded microcapsules could inhibit the growth of MDA-MB-231 cells using methyl thiazolyl tetrazolium assay. In summary, polylactide microcapsules exhibit excellent properties for sinomenine that can be used in drug or food industry.
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Affiliation(s)
- Wen Zhang
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Yan Gao
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Ning Yang
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Pingjin Hospital Heart Center, Logistics University of PAPF, Tianjin, China
| | - Hua Zhang
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Feng Zhang
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Han Qiu Chen
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Jianqiang Meng
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Shi Yu Zhang
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Wei Li
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China
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Hassanpour Aghdam M, Ghanbarzadeh S, Javadzadeh Y, Hamishehkar H. Aggregated Nanotransfersomal Dry Powder Inhalation of Itraconazole for Pulmonary Drug Delivery. Adv Pharm Bull 2016; 6:57-64. [PMID: 27123418 PMCID: PMC4845537 DOI: 10.15171/apb.2016.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/23/2015] [Accepted: 01/17/2016] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Local therapy is a valuable and strategic approach in the treatment of lung associated diseases and dry powder inhalation (DPI) formulations play the key role in this plan. Transfersome has been introduced as a novel biocompatible vesicular system with potential for administration in pulmonary drug delivery. The present study was designed to prepare Itraconazole-loaded nanotrantransfersomal DPI formulation. METHODS Itraconazole-loaded nanotransfersomes with three different types of surfactant in varying concentrations were prepared and characterized in the point of particle size distribution and morphology by laser light scattering and scanning electron microscopy (SEM) methods. The optimized transferosomal formulations were co-spray dried with mannitol and the aerosolization efficiency and aerodynamic properties of dry powders were determined by next generation impactor using a validated HPLC technique. RESULTS The volume mean diameter of optimized nanotransfersomal formulation with lecithin:Span® 60 in the ratio of 90:10 was 171 nm with narrow size distribution pattern which increased up to 518 nm after drug loading. Different types of surfactant did not influence the particle size significantly. SEM images confirmed the formation of aggregated nanoparticles in the suitable range (1-5 µm) for the pulmonary drug delivery. Aerosolization evaluation of co-spray dried formulations with different amounts of mannitol indicated that 2:1 ratio of mannitol:transfersome (w:w) showed the best aerosolization efficiency (fine particle fraction (FPF)=37%). Increasing of mannitol significantly decreased the FPF of the optimized formulations. CONCLUSION The results of this study was introduced the potential application of nanotransfersomes in the formulation of DPIs for lung delivery of various drugs.
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Affiliation(s)
- Mehdi Hassanpour Aghdam
- Research Center for Pharmaceutical Nanotechnology, and Students' Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Ghanbarzadeh
- Zanjan Pharmaceutical Nanotechnology Research Center, and Department of Pharmaceutics, Faculty of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran. ; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yousef Javadzadeh
- Biotechnology Research Center and Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Hamishehkar
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Wang Y, Sun T, Zhang Y, Chaurasiya B, Huang L, Liu X, Tu J, Xiong Y, Sun C. Exenatide loaded PLGA microspheres for long-acting antidiabetic therapy: preparation, characterization, pharmacokinetics and pharmacodynamics. RSC Adv 2016. [DOI: 10.1039/c6ra02994a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We herein fabricated the exenatide-loaded microspheres by a water in oil in oil (W/O/O) method, which presented great effect on glycemic control with low initial burst release and reduced risk of gastrointestinal intolerance and hypoglycemia.
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Affiliation(s)
- Yutong Wang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Ting Sun
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Yue Zhang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Birendra Chaurasiya
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Liping Huang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Xi Liu
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Jiasheng Tu
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Yerong Xiong
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Chunmeng Sun
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
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Pagels RF, Prud'homme RK. Polymeric nanoparticles and microparticles for the delivery of peptides, biologics, and soluble therapeutics. J Control Release 2015; 219:519-535. [PMID: 26359125 DOI: 10.1016/j.jconrel.2015.09.001] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/02/2015] [Accepted: 09/03/2015] [Indexed: 01/10/2023]
Abstract
Biologically derived therapeutics, or biologics, are the most rapidly growing segment of the pharmaceutical marketplace. However, there are still unmet needs in improving the delivery of biologics. Injectable polymeric nanoparticles and microparticles capable of releasing proteins and peptides over time periods as long as weeks or months have been a major focus in the effort to decrease the frequency of administration. These particle systems fit broadly into two categories: those composed of hydrophilic and those composed of hydrophobic polymeric scaffolds. Here we review the factors that contribute to the slow and controlled release from each class of particle, as well as the effects of synthesis parameters and product design on the loading, encapsulation efficiency, biologic integrity, and release profile. Generally, hydrophilic scaffolds are ideal for large proteins while hydrophobic scaffolds are more appropriate for smaller biologics without secondary structure. Here we also introduce a Flash NanoPrecipitation method that has been adopted for encapsulating biologics in nanoparticles (40-200nm) at high loadings (50-75wt.%) and high encapsulation efficiencies. The hydrophilic gel interior and hydrophobic shell provide an opportunity to combine the best of both classes of injectable polymeric depots.
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Affiliation(s)
- Robert F Pagels
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, United States
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, United States.
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16
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Sheng J, Han L, Qin J, Ru G, Li R, Wu L, Cui D, Yang P, He Y, Wang J. N-trimethyl chitosan chloride-coated PLGA nanoparticles overcoming multiple barriers to oral insulin absorption. ACS APPLIED MATERIALS & INTERFACES 2015; 7:15430-15441. [PMID: 26111015 DOI: 10.1021/acsami.5b03555] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Although several strategies have been applied for oral insulin delivery to improve insulin bioavailability, little success has been achieved. To overcome multiple barriers to oral insulin absorption simultaneously, insulin-loaded N-trimethyl chitosan chloride (TMC)-coated polylactide-co-glycoside (PLGA) nanoparticles (Ins TMC-PLGA NPs) were formulated in our study. The Ins TMC-PLGA NPs were prepared using the double-emulsion solvent evaporation method and were characterized to determine their size (247.6 ± 7.2 nm), ζ-potential (45.2 ± 4.6 mV), insulin-loading capacity (7.8 ± 0.5%) and encapsulation efficiency (47.0 ± 2.9%). The stability and insulin release of the nanoparticles in enzyme-containing simulated gastrointestinal fluids suggested that the TMC-PLGA NPs could partially protect insulin from enzymatic degradation. Compared with unmodified PLGA NPs, the positively charged TMC-PLGA NPs could improve the mucus penetration of insulin in mucus-secreting HT29-MTX cells, the cellular uptake of insulin via clathrin- or adsorption-mediated endocytosis in Caco-2 cells and the permeation of insulin across a Caco-2 cell monolayer through tight junction opening. After oral administration in mice, the TMC-PLGA NPs moved more slowly through the gastrointestinal tract compared with unmodified PLGA NPs, indicating the mucoadhesive property of the nanoparticles after TMC coating. Additionally, in pharmacological studies in diabetic rats, orally administered Ins TMC-PLGA NPs produced a stronger hypoglycemic effect, with 2-fold higher relative pharmacological availability compared with unmodified NPs. In conclusion, oral insulin absorption is improved by TMC-PLGA NPs with the multiple absorption barriers overcome simultaneously. TMC-PLGA NPs may be a promising drug delivery system for oral administration of macromolecular therapeutics.
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Affiliation(s)
| | | | | | | | | | - Lihong Wu
- ‡Department of Pharmaceutics, School of Pharmacy, Heilongjiang University of Chinese Medicine, Haerbin, Heilongjiang 150040, China
| | - Dongqi Cui
- ‡Department of Pharmaceutics, School of Pharmacy, Heilongjiang University of Chinese Medicine, Haerbin, Heilongjiang 150040, China
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Erdemli Ö, Keskin D, Tezcaner A. Influence of excipients on characteristics and release profiles of poly(ε-caprolactone) microspheres containing immunoglobulin G. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 48:391-9. [DOI: 10.1016/j.msec.2014.12.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/14/2014] [Accepted: 12/09/2014] [Indexed: 01/01/2023]
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Abstract
When formulated as liquid dosage forms, therapeutic proteins and peptides often show instability during handling as a result of chemical degradation. Solid formulations are frequently required to maintain protein stability during storage, transport and upon administration. Herein we highlight current strategies used to formulate pharmaceutical proteins in the solid form. An overview of the physical instabilities which can arise with proteins is first described. The key solidification techniques of crystallization, freeze-drying and particle forming technologies are then discussed. Examples of current commercial products that are formulated in the solid state are provided and include neutral protamine Hagedorn – insulin crystal suspensions, freeze-dried monoclonal antibodies and leuproride polylactide-co-glycolide microparticles. Finally, future perspectives in solid-state protein formulation are described.
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Araújo F, Shrestha N, Shahbazi MA, Fonte P, Mäkilä EM, Salonen JJ, Hirvonen JT, Granja PL, Santos HA, Sarmento B. The impact of nanoparticles on the mucosal translocation and transport of GLP-1 across the intestinal epithelium. Biomaterials 2014; 35:9199-207. [DOI: 10.1016/j.biomaterials.2014.07.026] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 07/19/2014] [Indexed: 12/25/2022]
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20
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Park KM, Sung H, Choi SJ, Choi YJ, Chang PS. Double-layered microparticles with enzyme-triggered release for the targeted delivery of water-soluble bioactive compounds to small intestine. Food Chem 2014; 161:53-9. [DOI: 10.1016/j.foodchem.2014.03.125] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 02/28/2014] [Accepted: 03/26/2014] [Indexed: 01/04/2023]
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Abstract
INTRODUCTION Proteins are effective biotherapeutics with applications in diverse ailments. Despite being specific and potent, their full clinical potential has not yet been realized. This can be attributed to short half-lives, complex structures, poor in vivo stability, low permeability, frequent parenteral administrations and poor adherence to treatment in chronic diseases. A sustained release system, providing controlled release of proteins, may overcome many of these limitations. AREAS COVERED This review focuses on recent development in approaches, especially polymer-based formulations, which can provide therapeutic levels of proteins over extended periods. Advances in particulate, gel-based formulations and novel approaches for extended protein delivery are discussed. Emphasis is placed on dosage form, method of preparation, mechanism of release and stability of biotherapeutics. EXPERT OPINION Substantial advancements have been made in the field of extended protein delivery via various polymer-based formulations over last decade despite the unique delivery-related challenges posed by protein biologics. A number of injectable sustained-release formulations have reached market. However, therapeutic application of proteins is still hampered by delivery-related issues. A large number of protein molecules are under clinical trials, and hence, there is an urgent need to develop new methods to deliver these highly potent biologics.
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Affiliation(s)
- Ravi Vaishya
- University of Missouri-Kansas City, Pharmaceutical Sciences , Kansas City, MO , USA
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22
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Emami J, Pourmashhadi A, Sadeghi H, Varshosaz J, Hamishehkar H. Formulation and optimization of celecoxib-loaded PLGA nanoparticles by the Taguchi design and their in vitro cytotoxicity for lung cancer therapy. Pharm Dev Technol 2014; 20:791-800. [PMID: 24841045 DOI: 10.3109/10837450.2014.920360] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The objective of the present study was to develop, evaluate and optimize a polymeric nanoparticle (NP) system containing Cxb for pulmonary delivery of Cxb in the treatment of lung cancer. NPs were prepared by the emulsion solvent diffusion and evaporation method using poly(D, L lactideglycolide) (PLGA). The size of NPs ranged from 153 to 192 nm and was affected by PLGA content, surfactant concentration and organic phase volume. Zeta potential of NPs (-4.5 to -8.6 mV) was more affected by PLGA content and organic phase volume. PLGA content was also the most effective factor on the entrapment efficiency and release rate of Cxb from NPs. The optimum formulation which obtained with 5 mg Cxb, 25 mg PLGA, 0.5% surfactant, 2.5% organic volume and 15 000 rpm showed release of Cxb within 30 h. The optimized formulation co-spray dried with lactose (hybrid microparticles) displayed desirable fine particle fraction, mass medium aerodynamic diameter, geometric standard deviation of 70.3%, 1.46% and 3.38%, respectively. Our results provide evidence for the potential of PLGA NPs for delivery of Cxb through inhalation as means to alleviate the cardiovascular risk of Cxb administration.
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Affiliation(s)
- Jaber Emami
- a Department of Pharmaceutics , School of Pharmacy and Pharmaceutical Sciences and Isfahan Pharmaceutical Research Center, Isfahan University of Medical Sciences , Isfahan , Iran
| | - Aida Pourmashhadi
- a Department of Pharmaceutics , School of Pharmacy and Pharmaceutical Sciences and Isfahan Pharmaceutical Research Center, Isfahan University of Medical Sciences , Isfahan , Iran
| | - Hojat Sadeghi
- b Department of Medicinal Chemistry , School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences , Isfahan , Iran and
| | - Jaleh Varshosaz
- a Department of Pharmaceutics , School of Pharmacy and Pharmaceutical Sciences and Isfahan Pharmaceutical Research Center, Isfahan University of Medical Sciences , Isfahan , Iran
| | - Hamed Hamishehkar
- c Drug Applied Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
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Xia Y, Pack DW. Pulsatile protein release from monodisperse liquid-core microcapsules of controllable shell thickness. Pharm Res 2014; 31:3201-10. [PMID: 24831313 DOI: 10.1007/s11095-014-1412-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 05/06/2014] [Indexed: 11/29/2022]
Abstract
PURPOSE Pulsatile delivery of proteins, in which release occurs over a short time after a period of little or no release, is desirable for many applications. This paper investigates the effect of biodegradable polymer shell thickness on pulsatile protein release from biodegradable polymer microcapsules. METHODS Using precision particle fabrication (PPF) technology, monodisperse microcapsules were fabricated encapsulating bovine serum albumin (BSA) in a liquid core surrounded by a drug-free poly(lactide-co-glycolide) (PLG) shell of uniform, controlled thickness from 14 to 19 μm. RESULTS When using high molecular weight PLG (Mw 88 kDa), microparticles exhibited the desired core-shell structure with high BSA loading and encapsulation efficiency (55-65%). These particles exhibited very slow release of BSA for several weeks followed by rapid release of 80-90% of the encapsulated BSA within 7 days. Importantly, with increasing shell thickness the starting time of the pulsatile release could be controlled from 25 to 35 days. CONCLUSIONS Biodegradable polymer microcapsules with precisely controlled shell thickness provide pulsatile release with enhanced control of release profiles.
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Affiliation(s)
- Yujie Xia
- Department of Chemical and Biomolecular Engineering, University of Illinois, 600 S. Mathews Avenue, Urbana, Illinois, 61801, USA
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24
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Qi F, Wu J, Fan Q, He F, Tian G, Yang T, Ma G, Su Z. Preparation of uniform-sized exenatide-loaded PLGA microspheres as long-effective release system with high encapsulation efficiency and bio-stability. Colloids Surf B Biointerfaces 2013; 112:492-8. [DOI: 10.1016/j.colsurfb.2013.08.048] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 08/21/2013] [Accepted: 08/29/2013] [Indexed: 10/26/2022]
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25
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Mahjub R, Radmehr M, Dorkoosh FA, Ostad SN, Rafiee-Tehrani M. Lyophilized insulin nanoparticles prepared from quaternizedN-aryl derivatives of chitosan as a new strategy for oral delivery of insulin:in vitro, ex vivoandin vivocharacterizations. Drug Dev Ind Pharm 2013; 40:1645-59. [DOI: 10.3109/03639045.2013.841187] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Huang X, Jeong YI, Moon BK, Zhang L, Kang DH, Kim I. Self-assembly of morphology-tunable architectures from tetraarylmethane derivatives for targeted drug delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3223-3233. [PMID: 23425332 DOI: 10.1021/la305069e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Tetraarylmethane compounds consisting of two pyrogallol and two aniline units, namely, Ar2CAr'2 {Ar = 3,4,5-C6H2(OH)3 and Ar' = 3,5-R2-4-C6H2NH2 [R = Me (1), iPr (2)]} exhibit excellent self-assembly behavior. Compound 1 yields size-tunable hollow nanospheres (HNSs) with a narrow size distribution, and 2 yields various morphologies ranging from microtubules to microrods via self-assembly induced by hydrogen bonding and π-π stacking interactions. On the basis of the experimental results, a plausible mechanism for morphology tunability was proposed. As a means of utilizing the self-assembled HNSs for targeting controlled drug delivery, folic acid (FA) and rhodamine 6G (Rh6G) were grafted onto compound 1 to yield the FA-Rh6G-1 complex. The HNSs fabricated with FA-Rh6G-1 showed low cytotoxicity against human embryonic kidney 293T cells and CT26 colon carcinoma cells and good doxorubicin (DOX) loading capacity (9.6 wt %). The FA receptor-mediated endocytosis of FA-Rh6G-1 HNSs examined by using a confocal laser scanning microscope and a flow cytometer revealed that the uptake of FA-Rh6G-1 HNSs into CT26 cells was induced by FA receptor-mediated endocytosis. In vitro drug delivery tests showed that the DOX molecules were released from the resulting HNSs in a sustainable and pH-dependent manner, demonstrating a potential application for HNSs in targeted drug delivery for cancer therapy.
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Affiliation(s)
- Xinhua Huang
- The WCU Center for Synthetic Polymer Bioconjugate Hybrid Materials, Department of Polymer Science and Engineering, Pusan National University, Pusan, Korea
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Zhang L, Jeong YI, Zheng S, Suh H, Kang DH, Kim I. Fabrication of microspheres via solvent volatization induced aggregation of self-assembled nanomicellar structures and their use as a pH-dependent drug release system. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:65-74. [PMID: 23215353 DOI: 10.1021/la303634y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A series of oleamide derivatives, (C(18)H(34)NO)(2)(CH(2))(n) [n = 2 (1a), 3 (1b), 4 (1c), or 6 (1d); C(18)H(34)NO = oleic amide fragment] and (C(18)H(34)NO)(CH(2))(6)NH(2) (2), have been synthesized and their self-assembly is investigated in ethanol/water media. Self-assembly of 1a and 1b in ethanol/water (1/0.1 v/v) solution (5 mg mL(-1)) yields microspheres (MSs) with the average diameter ∼10 μm via a gradual temperature reduction and solvent volatilization process. Under the same self-assembly conditions, microrods (average diameter ∼6 μm and several tens of micrometers in length), micronecklace-like, and shape-irregular microparticles are formed from the self-assembly of 1c, 1d, and 2, respectively. The kinetics of evolution for their self-assemblies by dynamic light scattering technique and in situ observation by optical microscopy reveals that the microstructures formation is from a well-behaved aggregation of nanoscale micelles induced by solvent volatilization. The FT-IR and temperature-dependent (1)H-NMR spectra demonstrate the hydrogen bonding force and π-π stacking, which drove the self-assembly of all oleamide derivatives in ethanol/water. Among the fabricated microstructures, the MSs from 1a exhibit the best dispersity, which thus have been used as a scaffold for the in vitro release of doxorubicin. The results demonstrate a pH-sensitive release process, enhanced release specifically at low pH 5.2.
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Affiliation(s)
- Lidong Zhang
- The WCU Center for Synthetic Polymer Bioconjugate Hybrid Materials, Department of Polymer Science and Engineering, Pusan National University, Pusan 609 735, Korea
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Extraction of PLGA-Microencapsulated Proteins Using a Two-Immiscible Liquid Phases System Containing Surfactants. Pharm Res 2012; 30:606-15. [DOI: 10.1007/s11095-012-0916-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Accepted: 10/12/2012] [Indexed: 11/25/2022]
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29
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Reix N, Parat A, Seyfritz E, Van Der Werf R, Epure V, Ebel N, Danicher L, Marchioni E, Jeandidier N, Pinget M, Frère Y, Sigrist S. In vitro uptake evaluation in Caco-2 cells and in vivo results in diabetic rats of insulin-loaded PLGA nanoparticles. Int J Pharm 2012; 437:213-20. [DOI: 10.1016/j.ijpharm.2012.08.024] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 08/13/2012] [Accepted: 08/16/2012] [Indexed: 11/26/2022]
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30
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Coutinho DF, Ahari AF, Kachouie NN, Gomes ME, Neves NM, Reis RL, Khademhosseini A. An automated two-phase system for hydrogel microbead production. Biofabrication 2012; 4:035003. [PMID: 22914562 DOI: 10.1088/1758-5082/4/3/035003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polymeric beads have been used for protection and delivery of bioactive materials, such as drugs and cells, for different biomedical applications. Here, we present a generic two-phase system for the production of polymeric microbeads of gellan gum or alginate, based on a combination of in situ polymerization and phase separation. Polymer droplets, dispensed using a syringe pump, formed polymeric microbeads while passing through a hydrophobic phase. These were then crosslinked, and thus stabilized, in a hydrophilic phase as they crossed through the hydrophobic-hydrophilic interface. The system can be adapted to different applications by replacing the bioactive material and the hydrophobic and/or the hydrophilic phases. The size of the microbeads was dependent on the system parameters, such as needle size and solution flow rate. The size and morphology of the microbeads produced by the proposed system were uniform, when parameters were kept constant. This system was successfully used for generating polymeric microbeads with encapsulated fluorescent beads, cell suspensions and cell aggregates proving its ability for generating bioactive carriers that can potentially be used for drug delivery and cell therapy.
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Affiliation(s)
- Daniela F Coutinho
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Taipas, 4806-909 Guimarães, Portugal
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Yan Y, Wei D, Li J, Zheng J, Shi G, Luo W, Pan Y, Wang J, Zhang L, He X, Liu D. A poly(L-lysine)-based hydrophilic star block co-polymer as a protein nanocarrier with facile encapsulation and pH-responsive release. Acta Biomater 2012; 8:2113-20. [PMID: 22373818 DOI: 10.1016/j.actbio.2012.02.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 02/09/2012] [Accepted: 02/20/2012] [Indexed: 01/24/2023]
Abstract
A hydrophilic star block co-polymer was synthesized, characterized, and evaluated as a protein nanocarrier. The star block co-polymer was composed of a hyperbranched polyethylenimine (PEI) core, a poly(L-lysine) (PLL) inner shell, and a poly(ethylene glycol) (PEG) outer shell. The model protein insulin can be rapidly and efficiently encapsulated by the synthesized polymer in aqueous phosphate buffer at physiological pH. Complexation between PEI-PLL-b-PEG and insulin was investigated using native polyacrylamide gel electrophoresis. The uptake of enhanced green fluorescent protein into Ad293 cells mediated by PEI-PLL-b-PEG was also investigated. The encapsulated insulin demonstrated sustained release at physiological pH and showed accelerated release when the pH was decreased. The insulin released from the star block co-polymer retained its chemical integrity and immunogenicity.
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Affiliation(s)
- Yunsong Yan
- Medical College, Shantou University, Shantou 515041, People's Republic of China
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Yao X, Bunt C, Cornish J, Quek SY, Wen J. Improved RP-HPLC method for determination of bovine lactoferrin and its proteolytic degradation in simulated gastrointestinal fluids. Biomed Chromatogr 2012; 27:197-202. [DOI: 10.1002/bmc.2771] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 05/08/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Xudong Yao
- School of Pharmacy, Faculty of Medical and Health Science; University of Auckland; Auckland; 1142; New Zealand
| | - Craig Bunt
- Faculty of Agriculture and Life Science; Lincoln University; Canterbury; 7647; New Zealand
| | - Jillian Cornish
- School of Medicine, Faculty of Medical and Health Science; University of Auckland; Auckland; 1142; New Zealand
| | - Siew-Young Quek
- Food Science, Faculty of Science; University of Auckland; Auckland; 1142; New Zealand
| | - Jingyuan Wen
- School of Pharmacy, Faculty of Medical and Health Science; University of Auckland; Auckland; 1142; New Zealand
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Youm I, Murowchick JB, Youan BBC. Entrapment and release kinetics of furosemide from pegylated nanocarriers. Colloids Surf B Biointerfaces 2012; 94:133-42. [DOI: 10.1016/j.colsurfb.2012.01.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2011] [Revised: 12/20/2011] [Accepted: 01/21/2012] [Indexed: 10/14/2022]
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Onoue S, Matsui T, Kuriyama K, Ogawa K, Kojo Y, Mizumoto T, Karaki SI, Kuwahara A, Yamada S. Inhalable sustained-release formulation of long-acting vasoactive intestinal peptide derivative alleviates acute airway inflammation. Peptides 2012; 35:182-9. [PMID: 22484228 DOI: 10.1016/j.peptides.2012.03.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 03/21/2012] [Accepted: 03/21/2012] [Indexed: 01/16/2023]
Abstract
The present study was undertaken to develop a respirable sustained-release powder (RP) formulation of long-acting VIP derivative, [Arg(15, 20, 21), Leu(17)]-VIP-GRR (IK312532), using PLGA nanospheres (NS) with the aim of improving the duration of action. NS formulation of IK312532 (IK312532/NS) was prepared by an emulsion solvent diffusion method in oil, and a mixture of the IK312532/NS and erythritol was jet-milled and mixed with lactose carrier to obtain the IK312532/NS-RP. Physicochemical properties were characterized focusing on appearance, particle size, and drug release, and in vivo pharmacological effects were assessed in antigen-sensitized rats. The IK312532/NS with a diameter of 140 nm showed a biphasic release pattern in distilled water with ca. 20% initial burst for 30 min and a sustained slow release up to ca. 55% for 24h. Laser diffraction analysis demonstrated that IK312532/NS-RP had fine dispersibility and suitable particle size for inhalation. In antigen-sensitized rats, insufflated IK312532/NS-RP (10 μg of IK312532/rat) could suppress increases of granulocyte recruitment and myeloperoxidase in pulmonary tissue for up to 24h after antigen challenge, although IK312532-RP at the same dose was less effective with limited duration of action. From these findings, newly prepared IK312532/NS-RP might be of clinical importance in improving duration of action and medication compliance for treatment of airway inflammatory diseases.
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Affiliation(s)
- Satomi Onoue
- Department of Pharmacokinetics and Pharmacodynamics, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan.
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Therapeutic strategies based on polymeric microparticles. J Biomed Biotechnol 2012; 2012:672760. [PMID: 22665988 PMCID: PMC3363323 DOI: 10.1155/2012/672760] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 02/28/2012] [Accepted: 03/13/2012] [Indexed: 01/06/2023] Open
Abstract
The development of the field of materials science, the ability to perform multidisciplinary scientific work, and the need for novel administration technologies that maximize therapeutic effects and minimize adverse reactions to readily available drugs have led to the development of delivery systems based on microencapsulation, which has taken one step closer to the target of personalized medicine. Drug delivery systems based on polymeric microparticles are generating a strong impact on preclinical and clinical drug development and have reached a broad development in different fields supporting a critical role in the near future of medical practice. This paper presents the foundations of polymeric microparticles based on their formulation, mechanisms of drug release and some of their innovative therapeutic strategies to board multiple diseases.
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Oak M, Singh J. Controlled Delivery of Basal Level of insulin From Chitosan–Zinc–Insulin-Complex-Loaded Thermosensitive Copolymer. J Pharm Sci 2012; 101:1079-96. [DOI: 10.1002/jps.22823] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 08/31/2011] [Accepted: 10/28/2011] [Indexed: 11/09/2022]
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Cózar-Bernal MJ, Holgado MA, Arias JL, Muñoz-Rubio I, Martín-Banderas L, Alvarez-Fuentes J, Fernández-Arévalo M. Insulin-loaded PLGA microparticles: flow focusing versus double emulsion/solvent evaporation. J Microencapsul 2012; 28:430-41. [PMID: 21736527 DOI: 10.3109/02652048.2011.576786] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT Oral administration of insulin is severely limited by very low bioavailability. Biocompatible polymeric nanocarriers have been investigated to overcome this problem. Flow focusing (FF) has revolutionized current engineering of poly(D,L-lactide-co-glycolide) (PLGA) based micromedicines. This technique has never been used to formulate insulin-loaded PLGA microparticles. OBJECTIVE Investigation of the benefits rising from the synthesis of insulin-loaded PLGA microplatforms by FF, compared to double emulsion/solvent evaporation method. MATERIALS AND METHODS Both synthesis methodologies were compared in terms of geometry, surface physicochemical properties and insulin vehiculization capabilities. The stability of the peptide during the formulation procedure was further analysed. RESULTS FF permitted the preparation of insulin-loaded microcarriers with better geometry and physicochemical properties for the oral route, along with greater insulin loading capabilities and sustained insulin release kinetics. DISCUSSION AND CONCLUSION Results have lead to the identification of the best formulation conditions for the engineering of insulin-loaded PLGA microparticles against diabetes.
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Affiliation(s)
- M J Cózar-Bernal
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Seville, Seville, Spain.
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Jianhao B, Sebastian B, Yein TS, Dieter T. Self-assembly of polyamines as a facile approach to fabricate permeability tunable polymeric shells for biomolecular encapsulation. ACS APPLIED MATERIALS & INTERFACES 2011; 3:1665-1674. [PMID: 21513314 DOI: 10.1021/am200214e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this article, the self-assembly of polyamines as a facile approach to fabricate permeability tunable polymeric shells for encapsulation of relatively low molecular weight (LM(w)) hydrophilic biomacromolecules (M(w) ≈ 4000 Da) is presented. The entire process is performed in organic solvents within 2 to 4 h to allow for nearly 100% encapsulation yield. The polymeric shells are fabricated by a two-step process: 1) The self-assembly of polyamines (nonionized poly(allylamine) (niPA) or branched nonionized polyethyleneimine (niPEI)) within porous agarose microbeads via an inwards buildup self-assembly process. 2) Stabilization of assembled polyamines either via covalent (cross-linkers) or ionic bonding (complex with nonionized poly(styrene sulfonic acid) (niPSS)). Stable and distinct polymeric shells are formed in both cases. The shell thickness is demonstrated to be tunable within a range of 1 to 14 μm; and as the inwards buildup self-assembly technique is not a self-limiting process, shells with broader thicknesses can be achieved. Also, it is demonstrated that the polymer density of the shell can be tuned. Depending on the fabrication parameters, the resulting polymeric shells have been demonstrated to have different permeability characteristics for relatively LM(W) dextran (M(W) ≈ 4000 Da). For example, niPEI shells are observed to have a higher permeability than niPA shells. Therefore, polymeric capsules can be fabricated via this facile approach for either retention of relatively LM(w) hydrophilic biomacromolecules or designed to passively or responsively release the biomacromolecule payload. This two-step shell fabrication process represent an alternative and facile approach for the fabrication of self-assembled polymeric shells in the fields of capsule-based reactors/sensors and drugs/gene delivery where relatively LM(w) macromolecules are concerned.
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Affiliation(s)
- Bai Jianhao
- Division of Bioengineering, National University of Singapore, Singapore
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Liu W, Huang X, Wei H, Chen K, Gao J, Tang X. Facile preparation of hollow crosslinked polyphosphazene submicrospheres with mesoporous shells. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11802a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Hamishehkar H, Emami J, Najafabadi AR, Gilani K, Minaiyan M, Hassanzadeh K, Mahdavi H, Koohsoltani M, Nokhodchi A. Pharmacokinetics and pharmacodynamics of controlled release insulin loaded PLGA microcapsules using dry powder inhaler in diabetic rats. Biopharm Drug Dispos 2010; 31:189-201. [PMID: 20238376 DOI: 10.1002/bdd.702] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The pulmonary route is an alternative route of administration for the systemic delivery of peptide and proteins with short-half lives. A long-acting formulation of insulin was prepared by encapsulation of protein into respirable, biodegradable microcapsules prepared by an oil in oil emulsification/solvent evaporation method. Insulin-loaded PLGA microcapsules prepared as a dry powder inhaler formulation were administered via the pulmonary route to diabetic rats and serum insulin and glucose concentrations were monitored. Control treatments consisted of respirable spray-dried insulin (RSDI) powder administered by intratracheal insufflation, insulin-loaded PLGA microcapsules and NPH (long-acting) insulin administered by subcutaneous (SC) administration. Pharmacokinetic analysis demonstrated that insulin administered in PLGA microcapsules illustrated a sustained release profile which resulted in a longer mean residence time, 4 and 5 fold longer than those after pulmonary administration of RSDI and SC injection of NPH insulin, respectively. Accordingly, the hypoglycemic profile followed a stable and sustained pattern which remained constant between 10 and 48 h. Results of the in vitro experiments were in good agreement with those of in vivo studies. Bronchoalveolar lavage fluid analysis indicated that microcapsules administration did not increase the activities of lactate dehydrogenase and total protein. However, histological examination of the lung tissue indicated a minor but detectable effect on the normal physiology of the rat lung. These findings suggest that the encapsulation of peptides and proteins into PLGA microcapsules technique could be a promising controlled delivery system for pulmonary administration.
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Affiliation(s)
- Hamed Hamishehkar
- Pharmaceutical Technology Laboratory, Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Hrynyk M, Martins-Green M, Barron AE, Neufeld RJ. Sustained prolonged topical delivery of bioactive human insulin for potential treatment of cutaneous wounds. Int J Pharm 2010; 398:146-54. [PMID: 20691251 DOI: 10.1016/j.ijpharm.2010.07.052] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Revised: 07/19/2010] [Accepted: 07/26/2010] [Indexed: 11/16/2022]
Abstract
Skin damaged by heat, radiation, or chemical exposure is difficult to treat and slow to heal. Indeed full restoration of the tissue is difficult to obtain. Sub-dermal insulin injection was recently shown to stimulate wound healing of the skin by accelerating wound closure, stimulating angiogenesis and inducing a regenerative process of healing. We have developed a topical delivery vehicle that is capable of releasing therapeutic levels of bioactive insulin for several weeks with the potential to stimulate and sustain healing. By encapsulating the crystalline form of insulin within poly(d,l-lactide-co-glycolide) microspheres, we succeeded in stabilizing and then releasing bioactive insulin for up to 25 days. To measure bioactivity we used Rat L6 myofibroblasts, stimulated them with this slow release insulin and determined activation of the receptors on the cell surface by quantifying AKT phosphorylation. There was only a minor and gradual decrease in AKT phosphorylation over time. To determine whether the slow release insulin could stimulate keratinocyte migration, wounding was simulated by scratching confluent cultures of human keratinocytes (HaCaT). Coverage of the scratch "wounds" was significantly faster in the presence of insulin released from microspheres than in the insulin-free control. Extended and sustained topical delivery of active insulin from a stable protein crystal-based reservoir shows promise in promoting tissue healing.
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Affiliation(s)
- Michael Hrynyk
- Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6.
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Influence of carrier particle size, carrier ratio and addition of fine ternary particles on the dry powder inhalation performance of insulin-loaded PLGA microcapsules. POWDER TECHNOL 2010. [DOI: 10.1016/j.powtec.2010.04.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ni D, Wang L, Sun Y, Guan Z, Yang S, Zhou K. Amphiphilic Hollow Carbonaceous Microspheres with Permeable Shells. Angew Chem Int Ed Engl 2010; 49:4223-7. [DOI: 10.1002/anie.201000697] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ni D, Wang L, Sun Y, Guan Z, Yang S, Zhou K. Amphiphilic Hollow Carbonaceous Microspheres with Permeable Shells. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000697] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hamishehkar H, Emami J, Najafabadi AR, Gilani K, Minaiyan M, Mahdavi H, Nokhodchi A. Effect of carrier morphology and surface characteristics on the development of respirable PLGA microcapsules for sustained-release pulmonary delivery of insulin. Int J Pharm 2010; 389:74-85. [DOI: 10.1016/j.ijpharm.2010.01.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 12/24/2009] [Accepted: 01/10/2010] [Indexed: 11/16/2022]
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PLGA microparticles in respirable sizes enhance an in vitro T cell response to recombinant Mycobacterium tuberculosis antigen TB10.4-Ag85B. Pharm Res 2009; 27:350-60. [PMID: 20024670 DOI: 10.1007/s11095-009-0028-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Accepted: 12/03/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE To study the use of poly (lactide-co-glycolide) (PLGA) microparticles in respirable sizes as carriers for recombinant tuberculosis (TB) antigen, TB10.4-Ag85B, with the ultimate goal of pulmonary delivery as vaccine for the prevention of TB. MATERIALS AND METHODS Recombinant TB antigens were purified from E. coli by FPLC and encapsulated into PLGA microparticles by emulsion/spray-drying. Spray-drying condition was optimized by half-factorial design. Microparticles encapsulating TB antigens were assessed for their ability to deliver antigens to macrophages for subsequent presentation by employing an in vitro antigen presentation assay specific to an Ag85B epitope. RESULTS Spray-drying condition was optimized to prepare PLGA microparticles suitable for pulmonary delivery (aerodynamic diameter of 3.3 microm). Antigen release from particles exhibited an initial burst release followed by sustained release up to 10 days. Antigens encapsulated into PLGA microparticles induced much stronger interleukin-2 secretion in a T-lymphocyte assay compared to antigen solutions for three particle formulations. Macrophages pulsed with PLGA-MDP-TB10.4-Ag85B demonstrated extended epitope presentation. CONCLUSION PLGA microparticles in respirable sizes were effective in delivering recombinant TB10.4-Ag85B in an immunologically relevant manner to macrophages. These results set the foundation for further investigation into the potential use of PLGA particles for pulmonary delivery of vaccines to prevent Mycobacterium tuberculosis infection.
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Hamishehkar H, Emami J, Najafabadi AR, Gilani K, Minaiyan M, Mahdavi H, Nokhodchi A. The effect of formulation variables on the characteristics of insulin-loaded poly(lactic-co-glycolic acid) microspheres prepared by a single phase oil in oil solvent evaporation method. Colloids Surf B Biointerfaces 2009; 74:340-9. [DOI: 10.1016/j.colsurfb.2009.08.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Revised: 05/18/2009] [Accepted: 08/04/2009] [Indexed: 11/27/2022]
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Mahdavi H, Mirzadeh H, Hamishehkar H, Jamshidi A, Fakhari A, Emami J, Najafabadi AR, Gilani K, Minaiyan M, Najafi M, Tajarod M, Nokhodchi A. The effect of process parameters on the size and morphology of poly(D,L-lactide-co-glycolide) micro/nanoparticles prepared by an oil in oil emulsion/solvent evaporation technique. J Appl Polym Sci 2009. [DOI: 10.1002/app.31595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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