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Giolando PA, Hopkins K, Davis BF, Vike N, Ahmadzadegan A, Ardekani AM, Vlachos PP, Rispoli JV, Solorio L, Kinzer-Ursem TL. Mechanistic Computational Modeling of Implantable, Bioresorbable Drug Release Systems. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301698. [PMID: 37243452 PMCID: PMC10697660 DOI: 10.1002/adma.202301698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/09/2023] [Indexed: 05/28/2023]
Abstract
Implantable, bioresorbable drug delivery systems offer an alternative to current drug administration techniques; allowing for patient-tailored drug dosage, while also increasing patient compliance. Mechanistic mathematical modeling allows for the acceleration of the design of the release systems, and for prediction of physical anomalies that are not intuitive and may otherwise elude discovery. This study investigates short-term drug release as a function of water-mediated polymer phase inversion into a solid depot within hours to days, as well as long-term hydrolysis-mediated degradation and erosion of the implant over the next few weeks. Finite difference methods are used to model spatial and temporal changes in polymer phase inversion, solidification, and hydrolysis. Modeling reveals the impact of non-uniform drug distribution, production and transport of H+ ions, and localized polymer degradation on the diffusion of water, drug, and hydrolyzed polymer byproducts. Compared to experimental data, the computational model accurately predicts the drug release during the solidification of implants over days and drug release profiles over weeks from microspheres and implants. This work offers new insight into the impact of various parameters on drug release profiles, and is a new tool to accelerate the design process for release systems to meet a patient specific clinical need.
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Affiliation(s)
- Patrick A Giolando
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Kelsey Hopkins
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Barrett F Davis
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Nicole Vike
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Adib Ahmadzadegan
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Arezoo M Ardekani
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Pavlos P Vlachos
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Joseph V Rispoli
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Luis Solorio
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Tamara L Kinzer-Ursem
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
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Abuelella KE, Abd-Allah H, Soliman SM, Abdel-Mottaleb MMA. Skin targeting by chitosan/hyaluronate hybrid nanoparticles for the management of irritant contact dermatitis: In vivo therapeutic efficiency in mouse-ear dermatitis model. Int J Biol Macromol 2023; 232:123458. [PMID: 36709804 DOI: 10.1016/j.ijbiomac.2023.123458] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/21/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Irritant contact dermatitis (ICD) is an inflammatory skin condition characterized by severe eczematous lesions. Nanoparticulate drug delivery is the most predominant way to improve dermal penetration and have gained remarkable recognition for targeted delivery of therapeutic payload and reduced off-target effects. Therefore, the current work aimed to fabricate polyelectrolyte complex nanoparticles (PENPs) containing two natural biodegradable polymers namely; chitosan (CS) and hyaluronic acid (HA) to deliver the non steroidal anti-inflammatory drug etoricoxib (ETX) to the deeper skin layers to alleviate any systemic toxicity and improve its therapeutic efficacy against ICD. ETX loaded-PENPs were prepared and optimized utilizing three independent variables; CS: HA mass ratio, chitosan solution pH and molecular weight of chitosan. Following the various physicochemical optimizations, the optimum ETX-loaded PENPs formulation (N1 0.15 %) exhibited spherical nature with an average diameter of 267.9 ± 9.4 nm, Polydispersity index of 0.366 ± 0.02, and positive zeta potential (+32.9 ± 0.47 mV). The drug was successfully entrapped and the entrapment efficiency reached 95 ± 0.2 %. N1 0.15 % formula showed efficient dermal targeting by significantly enhanced percentage of ETX permeated and retained in the various skin layers in comparison to ETX conventional gel during the ex-vivo skin permeation experiments. Furthermore, N1 0.15 % exhibited superior anti-inflammatory properties in vivo compared to ETX conventional gel in dithranol induced mice ear dermatitis. Conclusively, ETX-loaded PENPs could be a promising therapeutic approach for effecient management of ICD.
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Affiliation(s)
- Khaled E Abuelella
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, October 6 University, 6th of October City, Giza 12585, Egypt
| | - Hend Abd-Allah
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt.
| | - Sara M Soliman
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, October 6 University, 6th of October City, Giza 12585, Egypt
| | - Mona M A Abdel-Mottaleb
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
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A Single Injection with Sustained-Release Microspheres and a Prime-Boost Injection of Bovine Serum Albumin Elicit the Same IgG Antibody Response in Mice. Pharmaceutics 2023; 15:pharmaceutics15020676. [PMID: 36839998 PMCID: PMC9960585 DOI: 10.3390/pharmaceutics15020676] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/19/2023] Open
Abstract
Although vaccination is still considered to be the cornerstone of public health care, the increase in vaccination coverage has stagnated for many diseases. Most of these vaccines require two or three doses to be administered across several months or years. Single-injection vaccine formulations are an effective method to overcome the logistical barrier to immunization that is posed by these multiple-injection schedules. Here, we developed subcutaneously (s.c.) injectable microspheres with a sustained release of the model antigen bovine serum albumin (BSA). The microspheres were composed of blends of two novel biodegradable multi-block copolymers consisting of amorphous, hydrophilic poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone) (PCL-PEG-PCL) blocks and semi-crystalline poly(dioxanone) (PDO) blocks of different block sizes. In vitro studies demonstrated that the release of BSA could be tailored over a period of approximately four to nine weeks by changing the blend ratio of both polymers. Moreover, it was found that BSA remained structurally intact during release. Microspheres exhibiting sustained release of BSA for six weeks were selected for the in vivo study in mice. The induced BSA-specific IgG antibody titers increased up to four weeks after administration and were of the same magnitude as found in mice that received a priming and a booster dose of BSA in phosphate-buffered saline (PBS). Determination of the BSA concentration in plasma showed that in vivo release probably took place up to at least four weeks, although plasma concentrations peaked already one week after administration. The sustained-release microspheres might be a viable alternative to the conventional prime-boost immunization schedule, but a clinically relevant antigen should be incorporated to assess the full potential of these microspheres in practice.
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Impact of dispersion time interval and particle size on release profiles of propranolol HCl and carbamazepines from microparticle blends system. Sci Rep 2022; 12:10360. [PMID: 35726009 PMCID: PMC9209490 DOI: 10.1038/s41598-022-14678-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 06/10/2022] [Indexed: 12/14/2022] Open
Abstract
The objective of this study was to investigate the effect of dispersion time interval (DTI) on physicochemical properties of drug following the incorporation of propranolol HCl (Pro) and carbamazepine (CBZ) within ethyl cellulose (EC) microparticle blends using solvent evaporation method. The first Pro emulsion and second CBZ oil phase were dispersed in an external aqueous phase, with DTI of 0 and 60 min. The morphology of microparticle blends were characterized by SEM. The particle size mean of the emulsion droplets/hardened microparticles were monitored by FBRM. Encapsulation efficiency (EE) and in vitro drug release were also investigated. The resulting microparticle blends were spherical and formed two populations. The particle size mean of microparticle blends ranged from 113.27 µm to 122.42 µm. The EE was 77.28% to 78.64% for Pro and 96.48% to 98.64% for CBZ. FBRM studies showed that the size of microparticle blend prepared as W/O/W (Pro) and O/W (CBZ) system with DTI of 60 min and stirring time 4 h were larger than those prepared with DTI of 0 min. In vitro drug release studies after 28 days that revealed the CBZ release (58.72%) was faster than Pro release (43.16%). Investigation on surface morphology by SEM showed that the second drug CBZ which added as the oil phase in the W/O/W emulsion system had blocked the pores on the surface Pro microparticles prepared from the first primary emulsion, therefore affecting the drug release. This blocking effects of second drug (CBZ) on first emulsion microparticles (Pro) depended on the DTI. This phenomenon is only applicable if the first primary emulsion is W/O/W system.
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Green Synthesis of Silymarin-Chitosan Nanoparticles as a New Nano Formulation with Enhanced Anti-Fibrotic Effects against Liver Fibrosis. Int J Mol Sci 2022; 23:ijms23105420. [PMID: 35628233 PMCID: PMC9141191 DOI: 10.3390/ijms23105420] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/03/2022] [Accepted: 05/08/2022] [Indexed: 02/06/2023] Open
Abstract
Background: Silymarin (SIL) has long been utilized to treat a variety of liver illnesses, but due to its poor water solubility and low membrane permeability, it has a low oral bioavailability, limiting its therapeutic potential. Aim: Design and evaluate hepatic-targeted delivery of safe biocompatible formulated SIL-loaded chitosan nanoparticles (SCNPs) to enhance SIL’s anti-fibrotic effectiveness in rats with CCl4-induced liver fibrosis. Methods: The SCNPs and chitosan nanoparticles (CNPs) were prepared by ionotropic gelation technique and are characterized by physicochemical parameters such as particle size, morphology, zeta potential, and in vitro release studies. The therapeutic efficacy of successfully formulated SCNPs and CNPs were subjected to in vivo evaluation studies. Rats were daily administered SIL, SCNPs, and CNPs orally for 30 days. Results: The in vivo study revealed that the synthesized SCNPs demonstrated a significant antifibrotic therapeutic action against CCl4-induced hepatic injury in rats when compared to treated groups of SIL and CNPs. SCNP-treated rats had a healthy body weight, with normal values for liver weight and liver index, as well as significant improvements in liver functions, inflammatory indicators, antioxidant pathway activation, and lipid peroxidation reduction. The antifibrotic activities of SCNPs were mediated by suppressing the expression of the main fibrosis mediators TGFβR1, COL3A1, and TGFβR2 by boosting the hepatic expression of protective miRNAs; miR-22, miR-29c, and miR-219a, respectively. The anti-fibrotic effects of SCNPs were supported by histopathology and immunohistochemistry (IHC) study. Conclusions: According to the above results, SCNPs might be the best suitable carrier to target liver cells in the treatment of liver fibrosis.
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Lei Q, He F, Zhao X, Yin J. Preparation of Poly(Ionic Liquid) Microbeads by Evaporation‐Assisted Phase Separation. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202100379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qi Lei
- Smart Materials Laboratory Department of Applied Physics School of Physical Science and Technology Northwestern Polytechnical University Xi'an Shaanxi 710129 China
- Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen Guangdong 518057 China
| | - Fang He
- Smart Materials Laboratory Department of Applied Physics School of Physical Science and Technology Northwestern Polytechnical University Xi'an Shaanxi 710129 China
| | - Xiaopeng Zhao
- Smart Materials Laboratory Department of Applied Physics School of Physical Science and Technology Northwestern Polytechnical University Xi'an Shaanxi 710129 China
| | - Jianbo Yin
- Smart Materials Laboratory Department of Applied Physics School of Physical Science and Technology Northwestern Polytechnical University Xi'an Shaanxi 710129 China
- Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen Guangdong 518057 China
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Lv S, Liang S, Zuo J, Zhang S, Wei D. Preparation and application of chitosan-based fluorescent probes. Analyst 2022; 147:4657-4673. [DOI: 10.1039/d2an01070d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biomass materials have abundant natural resources, renewability and good biochemical compatibility, so biomass-based fluorescent materials prepared from biomass materials have gradually become a research hotspot.
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Affiliation(s)
- Shenghua Lv
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Shan Liang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Jingjing Zuo
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Shanshan Zhang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Dequan Wei
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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Coaxial electrospray of uniform polylactide core-shell microparticles for long-acting contraceptive. J Control Release 2021; 341:634-645. [PMID: 34921972 DOI: 10.1016/j.jconrel.2021.12.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 12/08/2021] [Accepted: 12/11/2021] [Indexed: 10/19/2022]
Abstract
Despite its high efficacy and good patient compliance, the only long-acting injectable (LAI) contraceptive currently available in the US, depot medroxyprogesterone acetate (DMPA), is limited by significant side effects and a delayed return to fertility for up to 10 months after its intended duration of action. To overcome these limitations, we sought to develop an injectable poly(D,l-lactide) (PLA) microparticle for sustained release of contraceptive hormone, etonogestrel (ENG). A one-step technique, coaxial electrospray method was applied to prepare uniform ENG loaded core-shell structured and slow-degrading PLA microparticles (ENG-cs-MPs) to provide release control while minimizing polymer content. By adjusting voltage, polymer concentration and flow rate of the coaxial jetting solution, the prepared ENG-cs-MPs exhibited uniformly small particle size with volume mean diameter of 14.7 ± 0.5 μm and a shell thickness of 2.5 ± 0.1 μm, high drug loading of ~54%, high encapsulation efficiency of ~99%, and initial 1-day burst release of just ~10%. Long-term in vitro release of ENG was continuous for more than 3 months without change of the shell structure in 6 months. In PK studies, ENG-cs-MPs achieved a steady and continuous drug release for approximately 3 months and then quickly tapered off within 3 weeks. Hence, ENG-cs-MPs prepared by the coaxial electrospray method may be useful as a LAI contraceptive with an improved PK profile relative to DMPA.
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Wan B, Andhariya JV, Bao Q, Wang Y, Zou Y, Burgess DJ. Effect of polymer source on in vitro drug release from PLGA microspheres. Int J Pharm 2021; 607:120907. [PMID: 34332059 DOI: 10.1016/j.ijpharm.2021.120907] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/13/2021] [Accepted: 07/18/2021] [Indexed: 12/28/2022]
Abstract
Determination of the qualitative (Q1) sameness of poly (lactic-co-glycolic acid) (PLGA) polymers can be very challenging due to PLGA being a random copolymer with inherent heterogeneity. Performance variation of PLGA microsphere drug product as a result of altered PLGA characteristics has been recognized as a critical limiting factor in product development. It has been reported that PLGA characteristics and degradation profiles are sensitive to minor differences in the manufacturing and control processes. Accordingly, the objectives of the present research were: 1) to determine minor differences in the physicochemical properties (such as inherent viscosity/molecular weight (Mw), blockiness, and glass transition temperature (Tg)) and the hydrolytic degradation profiles of PLGA polymers from different sources; and 2) to investigate the impact of any differences determined in (1) on the physicochemical properties (Q3) and in vitro release of leuprolide acetate microspheres. PLGA polymers were purchased from three different sources with similar inherent viscosity/Mw, monomer (Lactide/Glycolide) ratio, and end group as per the manufacturers' certificate of analysis (COA). These PLGA polymers were evaluated using the same in-house methods and showed differences in their properties such as Mw and blockiness. Three compositionally equivalent leuprolide acetate microspheres were prepared via a solvent evaporation method using the three PLGA polymers from different sources. The prepared microspheres showed differences in their physicochemical properties (such as particle size, porosity and average pore diameter) as well as in their in vitro drug release characteristics (burst effect and release rate). These results indicate that polymer source related variations have the potential to significantly impact the Q3 sameness and therapeutic performance of long-acting PLGA microspheres. The fundamental understanding gained on polymer properties will make a critical contribution to the development of quality control strategies as well as to future regulatory guidance on the evaluation of such complex drug products.
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Affiliation(s)
- Bo Wan
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States
| | - Janki V Andhariya
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States
| | - Quanying Bao
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States
| | - Yan Wang
- FDA/CDER, Office of Generic Drugs, Office of Research and Standards, Silver Spring MD 20993, United States
| | - Yuan Zou
- FDA/CDER, Office of Generic Drugs, Office of Research and Standards, Silver Spring MD 20993, United States
| | - Diane J Burgess
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States.
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Spetz MR, Isely C, Gower RM. Effect of fabrication parameters on morphology and drug loading of polymer particles for rosiglitazone delivery. J Drug Deliv Sci Technol 2021; 65:S1773-2247(21)00352-X. [PMID: 35096148 PMCID: PMC8793769 DOI: 10.1016/j.jddst.2021.102672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
For the past several decades, drug-encapsulated polymer particles have been investigated as locally-delivered, long-acting therapies. The most common method of producing such particles is the oil in water solvent extraction technique. Using this technique, we produced poly(lactide-co-glycolide) (PLG) microparticles encapsulating rosiglitazone, a small molecule anti-diabetic drug. We investigated the impact of modulating fabrication parameters, including choice of organic solvent, concentration of polymer, and speed of homogenization and centrifugation on particle morphology and drug loading. Additionally, we studied the ratio of air-water-interface area to the extraction bath volume, a previously unstudied fabrication parameter, and its impact on rosiglitazone loading when using dichloromethane as the organic solvent. Under the conditions tested, drug loading can be increased 5-fold by increasing this ratio, which may be achieved by simply selecting a larger extraction vessel. By changing the organic solvent from dichloromethane to ethyl acetate, we produced particles with 60% higher rosiglitazone loading. Interestingly, the particles made with ethyl acetate appeared phase dark under light microscopy suggesting the presence of internal pores. By increasing the proportion of organic phase in the emulsion we eliminated the aberrant morphology but did not alter drug loading. As a final step in the development of the particles, we established that rosiglitazone remained stable throughout the encapsulation process and its subsequent release from particles by demonstrating that rosiglitazone loaded particles enhanced adipocyte lipid storage and adiponectin secretion. Taken together, for this system, air-water-interface area to volume ratio of the extraction bath and organic solvent both arose as key parameters in maximizing rosiglitazone loading in PLG microparticles. This study of how fabrication parameters impact drug loading and particle morphology may be useful in other investigations to encapsulate small molecules in polymer particles for controlled release applications.
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Affiliation(s)
- Madeline R. Spetz
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208, USA
| | - Christopher Isely
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
| | - R. Michael Gower
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208, USA
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
- Veterans Affairs Medical Center, Columbia SC, 29209, USA
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Brunacci N, Wischke C, Naolou T, Patzelt A, Lademann J, Neffe AT, Lendlein A. Formulation of drug-loaded oligodepsipeptide particles with submicron size. Clin Hemorheol Microcirc 2021; 77:201-219. [PMID: 33185590 DOI: 10.3233/ch-200977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The size of particulate carriers is key to their transport and distribution in biological systems, and needs to be tailored in the higher submicron range to enable follicular uptake for dermal treatment. Oligodepsipeptides are promising nanoparticulate carrier systems as they can be designed to exhibit enhanced interaction with drug molecules. Here, a fabrication scheme for drug-loaded submicron particles from oligo[3-(S)-sec-butylmorpholine-2,5-dione]diol (OBMD) is presented based on an emulsion solvent evaporation method with cosolvent, surfactant, and polymer concentration as variable process parameters. The particle size (300-950 nm) increased with lower surfactant concentration and higher oligomer concentration. The addition of acetone increased the particle size at low surfactant concentration. Particle size remained stable upon the encapsulation of models compounds dexamethasone (DXM) and Nile red (NR), having different physicochemical properties. DXM was released faster compared to NR due to its higher water solubility. Overall, the results indicated that both drug-loading and size control of OBMD submicron particles can be achieved. When applied on porcine ear skin samples, the NR-loaded particles have been shown to allow NR penetration into the hair follicle and the depth reached with the 300 nm particles was comparable to the one reached with the cream formulation. A potential benefit of the particles compared to a cream is their sustained release profile.
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Affiliation(s)
- Nadia Brunacci
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Institute of Chemistry, University of Potsdam, Potsdam, Germany
| | - Christian Wischke
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - Toufik Naolou
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - Alexa Patzelt
- Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Dermatology Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jürgen Lademann
- Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Dermatology Venereology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Axel T Neffe
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Institute of Chemistry, University of Potsdam, Potsdam, Germany
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Co-delivery of glial cell-derived neurotrophic factor (GDNF) and tauroursodeoxycholic acid (TUDCA) from PLGA microspheres: potential combination therapy for retinal diseases. Drug Deliv Transl Res 2021; 11:566-580. [PMID: 33641047 DOI: 10.1007/s13346-021-00930-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2021] [Indexed: 01/21/2023]
Abstract
Retinitis pigmentosa (RP) is a group of genetically diverse inherited disorders characterised by the progressive photoreceptors and pigment epithelial cell dysfunction leading to central vision impairment. Although important advances in the understanding of the pathophysiologic pathways involved in RP have been made, drug delivery for the treatment of ocular disorders affecting the posterior segment of the eye is still an unmet clinical need. In the present study, we describe the development of multi-loaded PLGA-microspheres (MSs) incorporating two neuroprotectants agents (glial cell-line-derived neurotrophic factor-GDNF and Tauroursodeoxycholic acid-TUDCA) as a potential therapeutic tool for the treatment of RP. A solid-in-oil-in-water (S/O/W) emulsion solvent extraction-evaporation technique was employed for MS preparation. A combination of PLGA and vitamin E was used to create the microcarriers. The morphology, particle size, encapsulation efficiency and in vitro release profile of the MSs were studied. Encapsulation efficiencies of GDNF and TUDCA for the initial multiloaded MSs, prepared with methylene chloride (MC) as organic solvent and polyvinyl alcohol (PVA) solution in the external phase, were 28.53±0.36% and 45.65±8.01% respectively. Different technological parameters to optimise the formulation such as the incorporation of a water-soluble co-solvent ethanol (EtOH) in the internal organic phase, as well as NaCl concentration, and viscosity using a viscosizing agent (hydroxypropyl methylcellulose-HPMC) in the external aqueous phase were considered. EtOH incorporation and external phase viscosity of the emulsion were critical attributes for improving drug loading of both compounds. In such a way, when using a methylene chloride/EtOH ratio 75:25 into the inner organic phase and the viscosity agent HPMC (1% w/v) in the external aqueous phase, GDNF and TUDCA payloads resulted 48.86±1.49% and 78.58±10.40% respectively, and a decrease in the initial release of GDNF was observed (22.03±1.41% compared with 40.86±6.66% of the initial multi-loaded formulation). These optimised microparticles exhibited sustained in vitro releases over 91 days. These results suggest that the microencapsulation procedure optimised in this work presents a promising technological strategy for the development of multi-loaded intraocular drug delivery systems (IODDS).
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Kumari M, Sharma N, Manchanda R, Gupta N, Syed A, Bahkali AH, Nimesh S. PGMD/curcumin nanoparticles for the treatment of breast cancer. Sci Rep 2021; 11:3824. [PMID: 33589661 PMCID: PMC7884397 DOI: 10.1038/s41598-021-81701-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/24/2020] [Indexed: 01/31/2023] Open
Abstract
The present study aims at developing PGMD (poly-glycerol-malic acid-dodecanedioic acid)/curcumin nanoparticles based formulation for anticancer activity against breast cancer cells. The nanoparticles were prepared using both the variants of PGMD polymer (PGMD 7:3 and PGMD 6:4) with curcumin (i.e. CUR NP 7:3 and CUR NP 6:4). The size of CUR NP 7:3 and CUR NP 6:4 were found to be ~ 110 and 218 nm with a polydispersity index of 0.174 and 0.36, respectively. Further, the zeta potential of the particles was - 18.9 and - 17.5 mV for CUR NP 7:3 and CUR NP 6:4, respectively. The entrapment efficiency of both the nanoparticles was in the range of 75-81%. In vitro anticancer activity and the scratch assay were conducted on breast cancer cell lines, MCF-7 and MDA-MB-231. The IC50 of the nanoformulations was observed to be 40.2 and 33.6 μM at 48 h for CUR NP 7:3 and CUR NP 6:4, respectively, in MCF-7 cell line; for MDA-MB-231 it was 43.4 and 30.5 μM. Acridine orange/EtBr and DAPI staining assays showed apoptotic features and nuclear anomalies in the treated cells. This was further confirmed by western blot analysis that showed overexpression of caspase 9 indicating curcumin role in apoptosis.
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Affiliation(s)
- Mankamna Kumari
- Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, N.H. 8, Teh., Kishangarh, Dist., Ajmer, Rajasthan, 305817, India
| | - Nikita Sharma
- Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, N.H. 8, Teh., Kishangarh, Dist., Ajmer, Rajasthan, 305817, India
| | - Romila Manchanda
- School of Basic and Applied Sciences, K.R. Mangalam University, Sohna Road, Gurugram, 122103, India
| | - Nidhi Gupta
- Department of Biotechnology, IIS (Deemed To Be University), Gurukul Marg, SFS, Mansarovar, Jaipur, Rajasthan, 302020, India
| | - Asad Syed
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh, 11451, Saudi Arabia
| | - Ali H Bahkali
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh, 11451, Saudi Arabia
| | - Surendra Nimesh
- Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, N.H. 8, Teh., Kishangarh, Dist., Ajmer, Rajasthan, 305817, India.
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14
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Li G, He Y, Han W, Yu Y, Zhu L, Si T, Sun Y. An improved solvent evaporation method to produce poly (lactic acid) microspheres via foam-transfer. Int J Biol Macromol 2021; 172:114-123. [PMID: 33444658 DOI: 10.1016/j.ijbiomac.2021.01.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 12/28/2020] [Accepted: 01/06/2021] [Indexed: 11/26/2022]
Abstract
The aim of this work was to study an improved solvent evaporation method to prepare poly (lactic acid) (PLA) microspheres via foam-transfer. Since the foaming process and its transfer were critical to the improved method, they have been studied. Additionally, the delivery capability of foams was studied as a function of the oil/water ratio, the stirring rate, the concentration of polyvinyl alcohol (PVA) and ethanol (EtOH) in the aqueous phase (ωPVA, ωEtOH). It was found that foaming varied during the preparation process and it influenced the properties of PLA microspheres. When the oil/water ratio (w/w) ≥ 3:10, stirring rate ≥ 600 r/min, ωPVA ≥ 1 wt%, and ωEtOH = 0 wt%, solvent evaporation was able to produce enough foams for foam-transfer, which helped to deliver more than 89 wt% PLA microspheres to the receiving vessel. However, ωPVA ≤ 0.3 wt% and ωEtOH = 20 wt% were unfavorable for maintaining the spherical shape of PLA microspheres and caused the aggregation. The methodology was further used to prepare azoxystrobin-loaded PLA microspheres successfully with a high encapsulation efficiency of 86.54%. This work is meaningful since it enables an efficient and continuous route to prepare functional biodegradable polymer microspheres.
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Affiliation(s)
- Guiying Li
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China
| | - Yanping He
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China.
| | - Wanqing Han
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China
| | - Yang Yu
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China
| | - Linhua Zhu
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China
| | - Tian Si
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China
| | - Yanlin Sun
- School of Chemical Engineering, Kunming University of Science and Technology, Chenggong Campus, Kunming, Yunnan 650504, China
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Jana P, Shyam M, Singh S, Jayaprakash V, Dev A. Biodegradable polymers in drug delivery and oral vaccination. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110155] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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16
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Hsieh YK, Hung PH, Huang CW, Chuang KC, Wang J. Study on the degradation of biodegradable poly (glycerol maleate) (PGM) microbeads. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109223] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Aboshanab MHA, El-Nabarawi MA, Teaima MH, El-Nekeety AA, Abdel-Aziem SH, Hassan NS, Abdel-Wahhab MA. Fabrication, characterization and biological evaluation of silymarin nanoparticles against carbon tetrachloride-induced oxidative stress and genotoxicity in rats. Int J Pharm 2020; 587:119639. [PMID: 32673772 DOI: 10.1016/j.ijpharm.2020.119639] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 02/07/2023]
Abstract
This study aimed to synthesize silymarin nanoparticles (SILNPs) using chitosan nanoparticles as a delivery system and to evaluate their protective effects against CCl4 in rats. Eight groups of male Sprague-Dawley rats were treated for three weeks included the control group, CCl4-treated group (100 mg/kg b.w twice a week); SIL-treated group (50 mg/lg b.w); the groups treated daily with low dose (LD) or high dose (HD) of SILNPs (25, 50 mg/kg b.w) and the groups treated with CCl4 plus SIL, SILNPs (LD) or SILNPs (HD). Blood and tissue samples were collected for different assays. The synthesized SILNPs showed a smooth rounded shape with average particle size of 100 ± 2.8 nm. SILNPs contain the same compounds found in raw SIL and the in vitro release of SILNPs continues till 24 h. The in vivo study revealed that SIL and SILNPs at the low or high dose induced a significant improvement in the hematological parameters, liver and kidney function, lipid profile, serum cytokines, gene expression DNA fragmentation and histology of liver and kidney tissue resulted from CCl4. It could be concluded that SILNPs can be applied in oral delivery formulations with a potential application value for liver disease therapy.
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Affiliation(s)
- Mohamed H A Aboshanab
- Pharmaceutics & Industrial Pharmacy Dept., Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mohamed A El-Nabarawi
- Pharmaceutics & Industrial Pharmacy Dept., Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mahmoud H Teaima
- Pharmaceutics & Industrial Pharmacy Dept., Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Aziza A El-Nekeety
- Food Toxicology & Contaminants Dept., National Research Center, Dokki, Cairo, Egypt
| | | | - Nabila S Hassan
- Pathology Dept., National Research Center, Dokki, Cairo, Egypt
| | - Mosaad A Abdel-Wahhab
- Food Toxicology & Contaminants Dept., National Research Center, Dokki, Cairo, Egypt.
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18
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Okunlola A, Odeniyi MA, Arhewoh MI. Microsphere formulations of ambroxol hydrochloride: influence of Okra (Abelmoschus esculentus) mucilage as a sustained release polymer. Prog Biomater 2020; 9:65-80. [PMID: 32504415 PMCID: PMC7289913 DOI: 10.1007/s40204-020-00132-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 06/01/2020] [Indexed: 10/24/2022] Open
Abstract
Ambroxol hydrochloride (AH), a secretion-releasing expectorant, is a good candidate for sustained delivery. Mucilages are biodegradable, inexpensive carriers in microsphere formulations. The study aimed to prepare microspheres of AH using Okra mucilage obtained from pods of Abelmoschus esculentus combined with sodium alginate at various polymer/drug ratios. Okra mucilage was characterized for morphology, swelling, viscosity and flow properties. AH microspheres were prepared by ionic emulsification method and characterized using size, entrapment efficiency, swelling index and dissolution time (t50). A full 2 by 3 factorial experimental design using three factors (Okra mucilage/alginate ratio X1; drug/polymer ratio X2; and polymer concentration X3), each at two levels, was used to determine the effects of formulation variables on the responses. Optimized formulations of AH microspheres had sizes ranging from 250.91 ± 16.22 to 462.10 ± 23.85 µm; swelling index 1.35 ± 0.05 and 3.20 ± 0.03 and entrapment 55.70 ± 3.55-94.11 ± 4.50%. The microspheres exhibited sustained release of AH over a prolonged period as revealed by the dissolution time (t50) 2.85 ± 1.03-7.50 ± 0.96 h. Drug release kinetics generally followed zero order, implying that the process is constant and independent of the initial concentration of drug. Polymer concentration had the highest influence on microsphere size, entrapment efficiency and dissolution time while Okra/alginate ratio had the highest influence on swelling. Okra mucilage was a suitable polymer that could serve as an alternative to synthetic polymers in sustaining the release of ambroxol hydrochloride.
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Affiliation(s)
- Adenike Okunlola
- Department of Pharmaceutics and Industrial Pharmacy, University of Ibadan, Ibadan, Nigeria
| | | | - Matthew Ikhuoria Arhewoh
- Department of Pharmaceutics and Pharmaceutical Technology, University of Benin, Benin City, Nigeria.
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19
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Formulation technologies and advances for oral delivery of novel nitroimidazoles and antimicrobial peptides. J Control Release 2020; 324:728-749. [PMID: 32380201 DOI: 10.1016/j.jconrel.2020.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/01/2020] [Accepted: 05/02/2020] [Indexed: 02/06/2023]
Abstract
Antibiotic resistance has become a global crisis, driving the exploration for novel antibiotics and novel treatment approaches. Among these research efforts two classes of antibiotics, bicyclic nitroimidazoles and antimicrobial peptides, have recently shown promise as novel antimicrobial agents with the possibility to treat multi-drug resistant infections. However, they suffer from the issue of poor oral bioavailability due to disparate factors: low solubility in the case of nitroimidazoles (BCS class II drugs), and low permeability in the case of peptides (BCS class III drugs). Moreover, antimicrobial peptides present another challenge as they are susceptible to chemical and enzymatic degradation, which can present an additional pharmacokinetic hurdle for their oral bioavailability. Formulation technologies offer a potential means for improving the oral bioavailability of poorly permeable and poorly soluble drugs, but there are still drawbacks and limitations associated with this approach. This review discusses in depth the challenges associated with oral delivery of nitroimidazoles and antimicrobial peptides and the formulation technologies that have been used to overcome these problems, including an assessment of the drawbacks and limitations associated with the technologies that have been applied. Furthermore, the potential for supercritical fluid technology to overcome the shortcomings associated with conventional drug formulation methods is reviewed.
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20
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Mwila C, Walker RB. Improved Stability of Rifampicin in the Presence of Gastric-Resistant Isoniazid Microspheres in Acidic Media. Pharmaceutics 2020; 12:pharmaceutics12030234. [PMID: 32151053 PMCID: PMC7150845 DOI: 10.3390/pharmaceutics12030234] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/20/2020] [Accepted: 03/03/2020] [Indexed: 11/21/2022] Open
Abstract
The degradation of rifampicin (RIF) in an acidic medium to form 3-formyl rifamycin SV, a poorly absorbed compound, is accelerated in the presence of isoniazid, contributing to the poor bioavailability of rifampicin. This manuscript presents a novel approach in which isoniazid is formulated into gastric-resistant sustained-release microspheres and RIF into microporous floating sustained-release microspheres to reduce the potential for interaction between RIF and isoniazid (INH) in an acidic environment. Hydroxypropyl methylcellulose acetate succinate and Eudragit® L100 polymers were used for the manufacture of isoniazid-loaded gastric-resistant sustained-release microspheres using an o/o solvent emulsification evaporation approach. Microporous floating sustained-release microspheres for the delivery of rifampicin in the stomach were manufactured using emulsification and a diffusion/evaporation process. The design of experiments was used to evaluate the impact of input variables on predefined responses or quality attributes of the microspheres. The percent degradation of rifampicin following 12 h dissolution testing in 0.1 M HCl pH 1.2 in the presence of isoniazid gastric-resistant sustained-release microspheres was only 4.44%. These results indicate that the degradation of rifampicin in the presence of isoniazid in acidic media can be reduced by encapsulation of both active pharmaceutical ingredients to ensure release in different segments of the gastrointestinal tract, potentially improving the bioavailability of rifampicin.
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Affiliation(s)
- Chiluba Mwila
- Division of Pharmaceutics, Faculty of Pharmacy, Rhodes University, Grahamstown 6140, South Africa;
- School of Health Sciences, Department of Pharmacy, University of Zambia, Lusaka 10101, Zambia
| | - Roderick B. Walker
- Division of Pharmaceutics, Faculty of Pharmacy, Rhodes University, Grahamstown 6140, South Africa;
- Correspondence:
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21
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Predicting the drug loading efficiency into hybrid nanocarriers based on PLGA-vegetable oil using molecular dynamic simulation approach and Flory-Huggins theory. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101203] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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22
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Piacentini E, Mazzei R, Bazzarelli F, Ranieri G, Poerio T, Giorno L. Oleuropein Aglycone Production and Formulation by Integrated Membrane Process. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03210] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Piacentini
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - R. Mazzei
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - F. Bazzarelli
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - G. Ranieri
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - T. Poerio
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - L. Giorno
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
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23
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Atorvastatin loaded PLGA microspheres: Preparation, HAp coating, drug release and effect on osteogenic differentiation of ADMSCs. Int J Pharm 2019; 565:95-107. [DOI: 10.1016/j.ijpharm.2019.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/22/2019] [Accepted: 05/04/2019] [Indexed: 11/23/2022]
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24
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Mahaparale PR, Vinjamuri BP, Chavan MS, Chougule MB, Haware RV. Computational Predictability of Microsponge Properties Using Different Multivariate Models. AAPS PharmSciTech 2019; 20:172. [PMID: 31016473 DOI: 10.1208/s12249-019-1383-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/01/2019] [Indexed: 11/30/2022] Open
Abstract
The capabilities of principal component regression (PCR) and multiple linear regression (MLR) were evaluated to decipher and predict the impact of formulation and process parameters on the modeled metronidazole benzoate (MB)-ethyl cellulose (EC) microsponge (MBECM) properties. MBECM were prepared by a quasi-emulsion solvent diffusion method. A minimum experimentation was designed using Box-Behnken approach with one center point after initial screening experiments. Data was modeled by principal component analysis (PCA), PCR, and MLR. Two distinct groupings of developed MBECM was observed in initial qualitative PCA as a function of their respective formulation and processing parameters. Group A formulations with low dichloromethane, high PVA, and low stirring speed exhibited larger particle size, lower entrapment efficiency (EE), and lower actual drug content (ADC) than Group B formulations. Optimized quantitative PCR and MLR models demonstrated a linear dependence of particle size and quadratic dependence of EE and ADC on the studied formulation and process parameters. Interestingly, MLR models showed relatively better predictability of the selected MBECM formulation properties when compared with PCR. MBECM were amorphous in nature and spherical shaped. Carbopol® 940 NF based hydrogel of selected MBECM formulation exhibited a prolonged MB release than the commercial MB gel (Metrogyl®), showing no signs of necrosis in the goat mucosa. Thus, a properly designed minimum experimentation coupled with multivariate modeling generated a knowledge-rich target space, which enabled to understand and predict the performance of developed MBECM within a prescribed design space.
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25
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Bioerodable Ketamine-Loaded Microparticles Fabricated Using Dissolvable Hydrogel Template Technology. J Pharm Sci 2019; 108:1220-1226. [DOI: 10.1016/j.xphs.2018.10.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/18/2018] [Accepted: 10/18/2018] [Indexed: 11/23/2022]
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26
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Tyagi P, Pechenov S, RiosDoria J, Masterson L, Dickinson NJ, Howard P, Mao S, Harper J, Wetzel L, Yo K, Subramony JA. Evaluation of Pyrrolobenzodiazepine-Loaded Nanoparticles: A Targeted Drug Delivery Approach. J Pharm Sci 2018; 108:1590-1597. [PMID: 30472264 DOI: 10.1016/j.xphs.2018.11.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/25/2018] [Accepted: 11/14/2018] [Indexed: 01/28/2023]
Abstract
We describe the development and evaluation of pyrrolobenzodiazepines (PBDs) in poly(dl-lactide-co-glycolide) and lipid nanoparticle drug delivery systems. We have established that the partition coefficient (LogP) of PBD is a key influencer of the encapsulation efficiency in nanoparticle systems, with higher LogP values associated with higher encapsulation efficiencies toward increased drug payload delivery and better antitumor efficacy. Cytotoxicity assays demonstrated that compounds with higher LogP values demonstrated higher 50% inhibitory concentration values than the free drug. In vivo efficacy studies in mice demonstrated that a single injection of nanoparticle PBD formulations could inhibit tumor growth for nearly 3 weeks, whereas the free drug failed to inhibit growth. Importantly, mice treated with PBD-loaded nanoparticles did not experience significant loss of body weight. These data demonstrate that nanoparticles containing PBD molecules can be used as an alternative to the widely used antibody drug conjugate approach in delivering cytotoxic PBDs.
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Affiliation(s)
- Puneet Tyagi
- Research and Development, MedImmune, Gaithersburg, Maryland 20878
| | - Sergei Pechenov
- Research and Development, MedImmune, Gaithersburg, Maryland 20878
| | | | - Luke Masterson
- Research and Development, Spirogen, (Subsidiary of MedImmune), London, United Kingdom
| | - Niall J Dickinson
- Research and Development, Spirogen, (Subsidiary of MedImmune), London, United Kingdom
| | - Philip Howard
- Research and Development, Spirogen, (Subsidiary of MedImmune), London, United Kingdom
| | - Shenlan Mao
- Research and Development, MedImmune, Gaithersburg, Maryland 20878
| | - Jay Harper
- Research and Development, MedImmune, Gaithersburg, Maryland 20878
| | - Leslie Wetzel
- Research and Development, MedImmune, Gaithersburg, Maryland 20878
| | - Kwok Yo
- Research and Development, MedImmune, Gaithersburg, Maryland 20878
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27
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dos Santos TC, Battisti MA, Lobo KL, Caon T, Linder AE, Sonaglio D, de Campos AM. Vasorelaxant effect of standardized extract of Cecropia glaziovii Snethl encapsulated in PLGA microparticles: In vitro activity, formulation development and release studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:228-235. [DOI: 10.1016/j.msec.2018.06.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 05/23/2018] [Accepted: 06/19/2018] [Indexed: 11/16/2022]
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28
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Ahlawat J, Henriquez G, Narayan M. Enhancing the Delivery of Chemotherapeutics: Role of Biodegradable Polymeric Nanoparticles. Molecules 2018; 23:E2157. [PMID: 30150595 PMCID: PMC6225169 DOI: 10.3390/molecules23092157] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/12/2018] [Accepted: 08/15/2018] [Indexed: 11/16/2022] Open
Abstract
While pharmaceutical drugs have revolutionized human life, there are several features that limit their full potential. This review draws attention to some of the obstacles currently facing the use of chemotherapeutic drugs including low solubility, poor bioavailability and high drug dose. Overcoming these issues will further enhance the applicability and potential of current drugs. An emerging technology that is geared towards improving overall therapeutic efficiency resides in drug delivery systems including the use of polymeric nanoparticles which have found widespread use in cancer therapeutics. These polymeric nanoparticles can provide targeted drug delivery, increase the circulation time in the body, reduce the therapeutic indices with minimal side-effects, and accumulate in cells without activating the mononuclear phagocyte system (MPS). Given the inroads made in the field of nanodelivery systems for pharmaceutical applications, it is of interest to review and emphasize the importance of Polymeric nanocarrier system for drug delivery in chemotherapy.
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Affiliation(s)
- Jyoti Ahlawat
- The Department of Chemistry & Biochemistry, The University of Texas at El Paso, El Paso, TX 79968, USA.
| | - Gabriela Henriquez
- Environment Science & Engineering department, The University of Texas at El Paso, El Paso, TX 79968, USA.
| | - Mahesh Narayan
- The Department of Chemistry & Biochemistry, The University of Texas at El Paso, El Paso, TX 79968, USA.
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Synthesis of nucleoside-boronic esters hydrophobic pro-drugs: A possible route to improve hydrophilic nucleoside drug loading into polymer nanoparticles. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.05.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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30
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Preparation of Porous Polylactide Microspheres and Their Application in Tissue Engineering. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2079-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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31
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32
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Muhaimin, Bodmeier R. Effect of solvent type on preparation of ethyl cellulose microparticles by solvent evaporation method with double emulsion system using focused beam reflectance measurement. POLYM INT 2017. [DOI: 10.1002/pi.5436] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Muhaimin
- Department of Chemistry Education, Faculty of Education; University of Jambi; Jambi Indonesia
- College of Pharmacy; Freie Universität Berlin; Berlin Germany
| | - Roland Bodmeier
- College of Pharmacy; Freie Universität Berlin; Berlin Germany
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33
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Huang BB, Zhang SF, Chen PH, Wu G. Release and Degradation of Microencapsulated Spinosad and Emamectin Benzoate. Sci Rep 2017; 7:10864. [PMID: 28883452 PMCID: PMC5589813 DOI: 10.1038/s41598-017-11419-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 08/14/2017] [Indexed: 11/12/2022] Open
Abstract
The dynamics of release and degradation of the microencapsulation formulation containing spinosad (SP) and emamectin benzoate (EM) were evaluated in the present study. SP and EM were microencapsulated using biodegradable poly-lactic acid (PLA) as the wall material. Their release from and degradation within the prepared SP and EM microspheres (SP-EM-microspheres) were studied. It was found that the encapsulation significantly prolonged the insecticide release. The release could be further extended if the external aqueous phase was pre-saturated with the insecticides and the microspheres were additionally coated with gelatin. On the other hand, increasing the water content of the emulsion or the hydrophilic polycaprolactone (PCL) content in the PLA/PCL mixture accelerated the release. Due to the photolysis and hydrolysis of SP and EM by sunlight, the toxicity of the non-encapsulated insecticides in water declined continuously from 0 through the 9th day (d), and dissipated in 13 d. In contrast, an aqueous suspension containing 5% SP-EM-microspheres maintained a mostly constant toxicity to Plutella xylostella for 17 d. The biodegradable SP-EM-microspheres showed significantly higher long-term toxicity to P. xylostella due to lower release, reduced photolysis and hydrolysis of the encapsulated insecticides, which were affected by the varied preparation conditions.
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Affiliation(s)
- Bin Bin Huang
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Shao Fei Zhang
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Peng Hao Chen
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Gang Wu
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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Kim KH, Le TH, Oh HK, Heo B, Moon J, Shin S, Jeong SH. Protective microencapsulation of β-lapachone using porous glass membrane technique based on experimental optimisation. J Microencapsul 2017; 34:545-559. [PMID: 28805467 DOI: 10.1080/02652048.2017.1367850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Even though β-lapachone is a novel drug with pharmacological activity, it has limitations including instability under light conditions. The main purpose of the study was to enhance the stability of β-lapachone using the microencapsulation method. The Shirasu porous glass membrane was used to achieve uniform-sized microcapsules. The prepared microcapsules were evaluated to investigate how process parameters affect the encapsulation efficiency, photostability and particle size distribution. The experimental design was conducted to obtain optimal formulations. In addition, an operating space was drawn to identify the safer range of control factors. All control factors showed significant effects on the encapsulation efficiency and photostability. For example, when a large amount of polymers was used, encapsulation efficiency and photostability were improved. However, as the amount of polymers increased, large and polydisperse microcapsules were produced. The robust design method provided information to characterise significant factors, thereby allowing effective control of photostability and size of microcapsules.
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Affiliation(s)
- Ki Hyun Kim
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
| | - Tuan-Ho Le
- b Department of Industrial and Management Systems Engineering , Dong-A University , Busan , Republic of Korea
| | - Hee Kyung Oh
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
| | - Bora Heo
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
| | - Jeonghyun Moon
- c Korea International School , Seongnam-si, Gyeonggi , Republic of Korea
| | - Sangmun Shin
- b Department of Industrial and Management Systems Engineering , Dong-A University , Busan , Republic of Korea
| | - Seong Hoon Jeong
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
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Dual release behavior of atorvastatin and alpha-lipoic acid from PLGA microspheres for the combination therapy in peripheral nerve injury. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.04.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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36
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Penkina YA, Pavlovskaya OP, Avramenko GV. Development of a Microencapsulated Medicinal Form of Vinpocetine for Administration by Inhalation. Pharm Chem J 2017. [DOI: 10.1007/s11094-017-1558-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Jeevanandam J, Chan YS, Danquah MK. Nano-formulations of drugs: Recent developments, impact and challenges. Biochimie 2016; 128-129:99-112. [PMID: 27436182 DOI: 10.1016/j.biochi.2016.07.008] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 07/15/2016] [Indexed: 12/13/2022]
Abstract
Nano-formulations of medicinal drugs have attracted the interest of many researchers for drug delivery applications. These nano-formulations enhance the properties of conventional drugs and are specific to the targeted delivery site. Dendrimers, polymeric nanoparticles, liposomes, nano-emulsions and micelles are some of the nano-formulations that are gaining prominence in pharmaceutical industry for enhanced drug formulation. Wide varieties of synthesis methods are available for the preparation of nano-formulations to deliver drugs in biological system. The choice of synthesis methods depend on the size and shape of particulate formulation, biochemical properties of drug, and the targeted site. This article discusses recent developments in nano-formulation and the progressive impact on pharmaceutical research and industries. Additionally, process challenges relating to consistent generation of nano-formulations for drug delivery are discussed.
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Affiliation(s)
- Jaison Jeevanandam
- Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Yen San Chan
- Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University, CDT 250, 98009, Miri, Sarawak, Malaysia.
| | - Michael K Danquah
- Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University, CDT 250, 98009, Miri, Sarawak, Malaysia
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Han FY, Thurecht KJ, Whittaker AK, Smith MT. Bioerodable PLGA-Based Microparticles for Producing Sustained-Release Drug Formulations and Strategies for Improving Drug Loading. Front Pharmacol 2016; 7:185. [PMID: 27445821 PMCID: PMC4923250 DOI: 10.3389/fphar.2016.00185] [Citation(s) in RCA: 215] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 06/11/2016] [Indexed: 01/07/2023] Open
Abstract
Poly(lactic-co-glycolic acid) (PLGA) is the most widely used biomaterial for microencapsulation and prolonged delivery of therapeutic drugs, proteins and antigens. PLGA has excellent biodegradability and biocompatibility and is generally recognized as safe by international regulatory agencies including the United States Food and Drug Administration and the European Medicines Agency. The physicochemical properties of PLGA may be varied systematically by changing the ratio of lactic acid to glycolic acid. This in turn alters the release rate of microencapsulated therapeutic molecules from PLGA microparticle formulations. The obstacles hindering more widespread use of PLGA for producing sustained-release formulations for clinical use include low drug loading, particularly of hydrophilic small molecules, high initial burst release and/or poor formulation stability. In this review, we address strategies aimed at overcoming these challenges. These include use of low-temperature double-emulsion methods to increase drug-loading by producing PLGA particles with a small volume for the inner water phase and a suitable pH of the external phase. Newer strategies for producing PLGA particles with high drug loading and the desired sustained-release profiles include fabrication of multi-layered microparticles, nanoparticles-in-microparticles, use of hydrogel templates, as well as coaxial electrospray, microfluidics, and supercritical carbon dioxide methods. Another recent strategy with promise for producing particles with well-controlled and reproducible sustained-release profiles involves complexation of PLGA with additives such as polyethylene glycol, poly(ortho esters), chitosan, alginate, caffeic acid, hyaluronic acid, and silicon dioxide.
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Affiliation(s)
- Felicity Y. Han
- Centre for Integrated Preclinical Drug Development, The University of QueenslandBrisbane, QLD, Australia
| | - Kristofer J. Thurecht
- Australian Institute for Bioengineering and Nanotechnology, The University of QueenslandBrisbane, QLD, Australia
- Centre for Advanced Imaging, The University of QueenslandBrisbane, QLD, Australia
- ARC Centre of Excellence in Convergent BioNano Science and TechnologyBrisbane, QLD, Australia
| | - Andrew K. Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of QueenslandBrisbane, QLD, Australia
- ARC Centre of Excellence in Convergent BioNano Science and TechnologyBrisbane, QLD, Australia
| | - Maree T. Smith
- Centre for Integrated Preclinical Drug Development, The University of QueenslandBrisbane, QLD, Australia
- School of Pharmacy, The University of QueenslandBrisbane, QLD, Australia
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39
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Fabrication of uniform-sized poly-ɛ-caprolactone microspheres and their applications in human embryonic stem cell culture. Biomed Microdevices 2016; 17:105. [PMID: 26458560 DOI: 10.1007/s10544-015-0010-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The generation of liquefied poly-ɛ-caprolactone (PCL) droplets by means of a microfluidic device results in uniform-sized microspheres, which are validated as microcarriers for human embryonic stem cell culture. Formed droplet size and size distribution, as well as the resulting PCL microsphere size, are correlated with the viscosity and flow rate ratio of the dispersed (Q d) and continuous (Q c) phases. PCL in dichloromethane increases its viscosity with concentration and molecular weight. Higher viscosity and Q d/Q c lead to the formation of larger droplets, within two observed formation modes: dripping and jetting. At low viscosity of dispersed phase and Q d/Q c, the microfluidic device is operated in dripping mode, which generates droplets and microspheres with greater size uniformity. Solutions with lower molecular weight PCL have lower viscosity, resulting in a wider concentration range for the dripping mode. When coated with extracellular matrix (ECM) proteins, the fabricated PCL microspheres are demonstrated capable of supporting the expansion of human embryonic stem cells.
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40
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Biodegradable microparticles preparation by double emulsification—Solvent extraction method: A Systematic study. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.11.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Alzubaidi AFA, El-Helw ARM, Ahmed TA, Ahmed OAA. The use of experimental design in the optimization of risperidone biodegradable nanoparticles: in vitro and in vivo study. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:313-320. [DOI: 10.3109/21691401.2016.1147453] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Ali F. A. Alzubaidi
- Department of Pharmaceutics and Industrial Pharmacy Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdel-Raheem M. El-Helw
- Department of Pharmaceutics and Industrial Pharmacy Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Tarek A. Ahmed
- Department of Pharmaceutics and Industrial Pharmacy Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Osama A. A. Ahmed
- Department of Pharmaceutics and Industrial Pharmacy Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt
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42
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Lin X, Wang J, Xu Y, Tang X, Chen J, Zhang Y, Zhang Y, Yang Z. Tracking the effect of microspheres size on the drug release from a microsphere/sucrose acetate isobutyrate (SAIB) hybrid depotin vitroandin vivo. Drug Dev Ind Pharm 2016; 42:1455-65. [DOI: 10.3109/03639045.2016.1143952] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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43
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A trial for the design and optimization of pH-sensitive microparticles for intestinal delivery of cinnarizine. Drug Deliv Transl Res 2016; 6:195-209. [DOI: 10.1007/s13346-015-0277-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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44
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Di Martino A, Kucharczyk P, Zednik J, Sedlarik V. Chitosan grafted low molecular weight polylactic acid for protein encapsulation and burst effect reduction. Int J Pharm 2015; 496:912-21. [DOI: 10.1016/j.ijpharm.2015.10.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 10/02/2015] [Accepted: 10/03/2015] [Indexed: 11/25/2022]
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45
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Padhi S, Mirza MA, Verma D, Khuroo T, Panda AK, Talegaonkar S, Khar RK, Iqbal Z. Revisiting the nanoformulation design approach for effective delivery of topotecan in its stable form: an appraisal of its in vitro Behavior and tumor amelioration potential. Drug Deliv 2015; 23:2827-2837. [PMID: 26548664 DOI: 10.3109/10717544.2015.1105323] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Topotecan (TPT) is indicated against a variety of solid tumors, but has restricted clinical use owing to associated pharmaceutical caveats. This study is focused at formulating a successful TPT PLGA nanosystem which ameliorates the rapid conversion of active lactone form of drug to its inactive carboxylate form and consequently improvises its efficacy. TPT PLGA nanoparticles were formulated by a double emulsion-solvent evaporation technique with sequential optimization to obtain desired particle size, PDI, zeta potential, and entrapment efficiency. Stability of TPT was ensured by maintaining an acidic pH in the drug-containing phase and the system was evaluated for in vitro-in vivo performance including cytotoxic potency. The optimized nanosystem had a particle size of 187.33 ± 7.50 nm, a PDI of 0.179 ± 0.05, and an entrapment efficiency of 56 ± 1.2%. Low pH in the interior of nanoparticles stabilized the drug to remain in its active lactone form and revealed a biphasic release pattern till 15 d. Additionally, an in vitro cytotoxicity testing as well as in vivo antitumor efficacy demonstrated a significant potential of higher proliferation inhibition as compared with neat drug (TPT). Thus, the investigation summarized an innovative simple tool for developing stable TPT NPs for effective delivery for treating solid tumors.
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Affiliation(s)
- Santwana Padhi
- a Department of Pharmaceutics , Faculty of pharmacy Jamia Hamdard , New Delhi , India.,b Product Development Cell-II, National Institute of Immunology , New Delhi , India
| | | | - Devina Verma
- a Department of Pharmaceutics , Faculty of pharmacy Jamia Hamdard , New Delhi , India
| | - Tahir Khuroo
- a Department of Pharmaceutics , Faculty of pharmacy Jamia Hamdard , New Delhi , India
| | - Amulya K Panda
- b Product Development Cell-II, National Institute of Immunology , New Delhi , India
| | - Sushama Talegaonkar
- a Department of Pharmaceutics , Faculty of pharmacy Jamia Hamdard , New Delhi , India
| | | | - Zeenat Iqbal
- a Department of Pharmaceutics , Faculty of pharmacy Jamia Hamdard , New Delhi , India
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46
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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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47
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Ramazani F, Hiemstra C, Steendam R, Kazazi-Hyseni F, Van Nostrum C, Storm G, Kiessling F, Lammers T, Hennink W, Kok R. Sunitinib microspheres based on [PDLLA-PEG-PDLLA]-b-PLLA multi-block copolymers for ocular drug delivery. Eur J Pharm Biopharm 2015; 95:368-77. [DOI: 10.1016/j.ejpb.2015.02.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/05/2015] [Accepted: 02/09/2015] [Indexed: 10/24/2022]
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48
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Xiong N, Dong XY, Zheng J, Liu FF, Sun Y. Design of LVFFARK and LVFFARK-functionalized nanoparticles for inhibiting amyloid β-protein fibrillation and cytotoxicity. ACS APPLIED MATERIALS & INTERFACES 2015; 7:5650-5662. [PMID: 25700145 DOI: 10.1021/acsami.5b00915] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Aggregation of amyloid β-protein (Aβ) into amyloid oligomers and fibrils is pathologically linked to Alzheimer's disease (AD). Hence, the inhibition of Aβ aggregation is essential for the prevention and treatment of AD, but the development of potent agents capable of inhibiting Aβ fibrillogenesis has posed significant challenges. Herein, we designed Ac-LVFFARK-NH2 (LK7) by incorporating two positively charged residues, R and K, into the central hydrophobic fragment of Aβ17-21 (LVFFA) and examined its inhibitory effect on Aβ42 aggregation and cytotoxicity by extensive physical, biophysical, and biological analyses. LK7 was observed to inhibit Aβ42 fibrillogenesis in a dose-dependent manner, but its strong self-assembly characteristic also resulted in high cytotoxicity. In order to prevent the cytotoxicity that resulted from the self-assembly of LK7, the peptide was then conjugated to the surface of poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) to fabricate a nanosized inhibitor, LK7@PLGA-NPs. It was found that LK7@PLGA-NPs had little cytotoxicity because the self-assembly of the LK7 conjugated on the NPs was completely inhibited. Moreover, the NPs-based inhibitor showed remarkable inhibitory capability against Aβ42 aggregation and significantly alleviated its cytotoxicity at a low LK7@PLGA-NPs concentration of 20 μg/mL. At the same peptide concentration, free LK7 showed little inhibitory effect. It is considered that several synergetic effects contributed to the strong inhibitory ability of LK7@PLGA-NPs, including the enhanced interactions between Aβ42 and LK7@PLGA-NPs brought on by inhibiting LK7 self-assembly, restricting conformational changes of Aβ42, and thus redirecting Aβ42 aggregation into unstructured, off-pathway aggregates. The working mechanisms of the inhibitory effects of LK7 and LK7@PLGA-NPs on Aβ42 aggregation were proposed based on experimental observations. This work provides new insights into the design and development of potent NPs-based inhibitors against Aβ aggregation and cytotoxicity.
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Affiliation(s)
- Neng Xiong
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xiao-Yan Dong
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jie Zheng
- ‡Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Fu-Feng Liu
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yan Sun
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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49
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Meeus J, Lenaerts M, Scurr DJ, Amssoms K, Davies MC, Roberts CJ, Van Den Mooter G. The influence of spray-drying parameters on phase behavior, drug distribution, and in vitro release of injectable microspheres for sustained release. J Pharm Sci 2015; 104:1451-60. [PMID: 25648704 DOI: 10.1002/jps.24361] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 12/02/2014] [Accepted: 12/09/2014] [Indexed: 10/24/2022]
Abstract
For ternary solid dispersions, it is indispensable to characterize their structure, phase behavior, and the spatial distribution of the dispersed drug as this might influence the release profile and/or stability of these formulations. This study shows how formulation (feed concentration) and process (feed rate, inlet air temperature, and atomizing air pressure) parameters can influence the characteristics of ternary spray-dried solid dispersions. The microspheres considered here consist of a poly(lactic-co-glycolic acid) (PLGA) surface layer and an underlying polyvinylpyrrolidone (PVP) phase. A poorly soluble active pharmaceutical ingredient (API) was molecularly dispersed in this matrix. Differences were observed in component miscibility, phase heterogeneity, particle size, morphology, as well as API surface coverage for selected spray-drying parameters. Observed differences are likely because of changes in the droplet generation, evaporation, and thus particle formation processes. However, varying particle characteristics did not influence the drug release of the formulations studied, indicating the robustness of this approach to produce particles of consistent drug release characteristics. This is likely because of the fact that the release is dominated by diffusion from the PVP layer through pores in the PLGA surface layer and that observed differences in the latter have no influence on the release.
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Affiliation(s)
- Joke Meeus
- Drug Delivery and Disposition, KU Leuven, Leuven, Belgium
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50
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Ray S, Mishra A, Mandal TK, Sa B, Chakraborty J. Optimization of the process parameters for the fabrication of a polymer coated layered double hydroxide-methotrexate nanohybrid for the possible treatment of osteosarcoma. RSC Adv 2015. [DOI: 10.1039/c5ra15859a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The study demonstrates the method of optimization for the development of PLGA encapsulated LDH-MTX, MTX and their in vitro and in vivo evaluation.
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Affiliation(s)
- Sayantan Ray
- CSIR-Central Glass and Ceramic Research Laboratory
- Kolkata-700 032
- India
| | - Akhilesh Mishra
- West Bengal University of Animal and Fishery Sciences
- Kolkata-700037
- India
| | - Tapan Kumar Mandal
- West Bengal University of Animal and Fishery Sciences
- Kolkata-700037
- India
| | - Biswanath Sa
- Department of Pharmaceutical Technology
- Jadavpur University
- Kolkata-700 032
- India
| | - Jui Chakraborty
- CSIR-Central Glass and Ceramic Research Laboratory
- Kolkata-700 032
- India
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