1
|
Abd-Elaty DM, Ishak RAH, Osman R, Geneidi AS. Engineering a novel water-in-oil biocompatible microemulsion system for the ocular delivery of dexamethasone sodium phosphate in the treatment of acute uveitis. Int J Pharm 2024; 650:123704. [PMID: 38097148 DOI: 10.1016/j.ijpharm.2023.123704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 12/18/2023]
Abstract
Due to their unique characteristics, microemulsions (ME) represent one of the most promising delivery systems which can conquer poor ocular drug bioavailability providing long residence time. Development of a ME system, relying on the use of a safe and non-irritant surfactant combination derived from sustainable resources and which can consolidate the small ME droplets, is the goal of this work. Herein, we report the design and characterization of a novel biocompatible, eco-friendly ME system loaded with the hydrophilic dexamethasone sodium phosphate (DEXP) using a novel surfactant mixture composed of D-α-tocopherol polyethylene glycol succinate (TPGS) and Plantacare® (coco-Glycosides). Capryol™ PGMC and double-distilled water were used as the respective oil and aqueous phases and the MEs were prepared by the water titration method, suitable for scaling up. Optimization of ME formulae was conducted by varying Plantacare® grades, TPGS to Plantacare® mass ratios and drug loading. The formulae were characterized in terms of physical appearance, droplet size (PS), size distribution (PDI), zeta potential (ZP), and stability. The optimized DEXP-loaded ME formula attained acceptable PS, PDI, and ZP values of 43 ± 5 nm, 0.35 ± 0.07, -12 ± 4 mV, respectively. TEM images confirmed a small PS ≤ 100 nm. The in vivo safety of ME was proved by the Draize test. The ME formula prompted excellent mucoadhesion and transcorneal permeation. The confocal studies showed deep penetration into the rabbits' corneas. In vivo studies using endotoxin-induced uveitis showed high ocular efficacy and a significant reduction in inflammatory cells, including interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). The obtained results elect the novel engineered ME system as a promising tool for the ocular delivery of hydrophilic moieties in the management of various ophthalmic diseases.
Collapse
Affiliation(s)
- Dina M Abd-Elaty
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| | - Rania A H Ishak
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt.
| | - Rihab Osman
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| | - Ahmed S Geneidi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| |
Collapse
|
2
|
Li M, Vora LK, Peng K, Donnelly RF. Trilayer microneedle array assisted transdermal and intradermal delivery of dexamethasone. Int J Pharm 2022; 612:121295. [PMID: 34785356 DOI: 10.1016/j.ijpharm.2021.121295] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 11/06/2021] [Accepted: 11/10/2021] [Indexed: 12/15/2022]
Abstract
Dexamethasone is a synthesised glucocorticoid that is widely used in the treatment of various inflammatory skin conditions. Novel trilayer dissolving microneedle arrays were manufactured to assist dexamethasone delivery via the skin. Both transdermal delivery and intradermal delivery of dexamethasone can be achieved this way. Additionally, we proposed a novel strategy of co-formulating dexamethasone and its pro-drug dexamethasone sodium phosphate into the same dissolving microneedle array, with a view to achieving a fast onset of action and also sustained treatment. Here, a 3D-printing technique was employed, for the first time, to fabricate a baseplate for these microneedle arrays. The 3D-printed baseplates provided strong support to aid the insertion of the drug-encapsulated tips. A simple and rapid HPLC method was developed, and validated, to separate and quantify dexamethasone and dexamethasone sodium phosphate in the same sample. Ex-vivo studies found that these trilayer dissolving microneedle arrays could achieve a delivery efficiency of over 40% in intradermal delivery and over 50% in transdermal delivery. Trilayer microneedle-assisted delivery of this glucocorticoid provided a promising alternative to oral and parenteral routes of dexamethasone administration.
Collapse
Affiliation(s)
- Mingshan Li
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Lalitkumar K Vora
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Ke Peng
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Ryan F Donnelly
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK.
| |
Collapse
|
3
|
Al-Owaidi MF, Alkhafaji SL, Mahood AM. Quantitative determination of dexamethasone sodium phosphate in bulk and pharmaceuticals at suitable pH values using the spectrophotometric method. J Adv Pharm Technol Res 2021; 12:378-383. [PMID: 34820313 PMCID: PMC8588914 DOI: 10.4103/japtr.japtr_6_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 06/30/2021] [Accepted: 07/19/2021] [Indexed: 11/04/2022] Open
Abstract
Dexamethasone sodium phosphate (DSP) is an ester of dexamethasone with anti-inflammatory action. This study provides new insights to develop a simple, precise, and accurate spectrophotometric method for the quantitative determination of DSP in bulk and pharmaceuticals. The method was validated before being applied to determine the DSP in six pharmaceutical injection forms from different companies. DSP is soluble in phosphate buffer, so it was used as a solvent, and a pH of 6 was found to be suitable for determination purposes. The DSP solution was scanned in the ultraviolet range (200–400 nm) using a double-beam spectrophotometer with a 1-cm quartz cell. The wavelength (λ max) of DSP was set at 242.5 nm, following the Beer–Lambert law for concentrations from 2 to 50 μg/ml. Dexa AIWA (Germany) showed the best results, being very close to the bulk value with no significant variation. Similarly, Dexamed (Cyprus) and HEMAZON (Syria) showed no significant differences from the bulk; however, the three remaining injections, DEXAKAL (India), DEXABRU (India), and DEXARON (China), showed significant variations from the bulk. Estimated limit of detection and limit of quantitation values for DSP were 0.83 and 2.5 μg/ml, respectively, with a regression coefficient of 0.999. Recovery studies were then used to determine the accuracy of the suggested method. The percentage of recovery was found to be 98.58%–102.52%. All results are suggesting a pivotal method for the routine analysis of DSP both in pure form and the commercially pharmaceutical forms.
Collapse
Affiliation(s)
| | - Sura L Alkhafaji
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Kerbala, Kerbala, Iraq
| | - Abdulbari Mahdi Mahood
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Kerbala, Kerbala, Iraq
| |
Collapse
|
4
|
Akrami-Hasan-Kohal M, Eskandari M, Solouk A. Silk fibroin hydrogel/ dexamethasone sodium phosphate loaded chitosan nanoparticles as a potential drug delivery system. Colloids Surf B Biointerfaces 2021; 205:111892. [PMID: 34107443 DOI: 10.1016/j.colsurfb.2021.111892] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 05/19/2021] [Accepted: 06/01/2021] [Indexed: 12/25/2022]
Abstract
The application of nanoparticles-loaded hydrogel as a novel formulation has gotten much attention for a potential drug delivery method for desire drug controlling and targeting. This study prepared a sustained release formulation using dexamethasone sodium phosphate-loaded chitosan nanoparticles embedded in silk fibroin hydrogel. Dexamethasone sodium phosphate-loaded chitosan nanoparticles (DEX-CSNPs) was developed using the ionotropic-gelation technique and inserted in the silk fibroin hydrogel (SFH). Mean particle size, polydispersity index (PDI), and zeta potential of DEX-CSNPs were 488.05±38.69 nm, 0.15±0.07, 32.12±2.42 mV, respectively. The encapsulation efficiency (EE), drug loading capacity (LC), and the cumulative amount of released drug of DEX-loaded CSNPs, which detected in phosphate buffer saline (PBS) solution, were 67.6±6.7%, 15.7±5.7%, and 75.84%, respectively. The DEX-CSNPs were then mixed with silk fibroin (SF) solution and induced gelation by sonication to prepare a drug-releasing system. As a result, the scanning electron microscopy (SEM) image shows that the prepared drug delivery system had a properly interconnected porous structure. Smaller pore size, greater porosity, higher water uptake, and swelling ratio were achieved by incorporating CSNPs and DEX-loaded CSNPs. The cytotoxicity study was performed for the L929 fibroblast cell line. The drug release kinetics study was performed on a prepared drug delivery system. Finally, the release test results showed a suitable extended-release of DEX from the carrier over 16 days. Overall, the developed drug-releasing system can be a promising candidate for drug delivery applications.
Collapse
Affiliation(s)
- Mohammad Akrami-Hasan-Kohal
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, 1591634311, Iran
| | - Mahnaz Eskandari
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, 1591634311, Iran.
| | - Atefeh Solouk
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, 1591634311, Iran
| |
Collapse
|
5
|
Jadhav D, Vavia P. Dexamethasone Sodium Phosphate Loaded Modified Cyclodextrin Based Nanoparticles: An Efficient Treatment for Rheumatoid Arthritis. J Pharm Sci 2020; 110:1206-1218. [PMID: 33075379 DOI: 10.1016/j.xphs.2020.10.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/27/2020] [Accepted: 10/07/2020] [Indexed: 12/28/2022]
Abstract
The main aim of the current research was to develop a modified cyclodextrin based nanoparticulate drug delivery system to deliver dexamethasone sodium phosphate (DSP) for the treatment of rheumatoid arthritis (RA). DSP is a glucocorticoid (GC), and its limited application in RA therapy due to poor pharmacokinetics and its severe associated side effects. DSP loaded hydrophobically modified cyclodextrin based nanoparticles (DSP-NPs) prepared by a double emulsion solvent evaporation method. The nanoparticle size was <120 nm, good entrapment efficiency and excellent stability were obtained. TEM study showed that nanoparticles were perfectly spherical shape. The in-vitro drug release from nanoparticle follows the non-Fickian diffusion mechanism. The pharmacokinetic profile of DSP after encapsulation showing the 2.3-fold increase in AUC and extended mean residence time, which increases the chances of nanoparticles to extravasate into the site of inflammation by the EPR effect. The pharmacodynamic studies in the Adjuvant-induced Arthritis (AIA) rat model showing a significant reduction in arthritic score, paw thickness, and inflammatory cytokine level in serum. Adverse effects evaluation studies demonstrate a significant reduction in the associated undesirable effects on body weight, blood glucose level, renal impairment, and hematological abnormalities compared to marketed formulation. These results suggest that DSP-NPs can be used as an efficient therapy for RA.
Collapse
Affiliation(s)
- Dhananjay Jadhav
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, University Under Section 3 of UGC Act-1956, Elite Status and Center of Excellence - Government of Maharashtra, TEQIP Phase III Funded, Mumbai 400019, India
| | - Pradeep Vavia
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, University Under Section 3 of UGC Act-1956, Elite Status and Center of Excellence - Government of Maharashtra, TEQIP Phase III Funded, Mumbai 400019, India.
| |
Collapse
|
6
|
Yan F, Zhong Z, Wang Y, Feng Y, Mei Z, Li H, Chen X, Cai L, Li C. Exosome-based biomimetic nanoparticles targeted to inflamed joints for enhanced treatment of rheumatoid arthritis. J Nanobiotechnology 2020; 18:115. [PMID: 32819405 PMCID: PMC7441703 DOI: 10.1186/s12951-020-00675-6] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 08/11/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Glucocorticoids (GCs) show powerful treatment effect on rheumatoid arthritis (RA). However, the clinical application is limited by their nonspecific distribution after systemic administration, serious adverse reactions during long-term administration. To achieve better treatment, reduce side effect, we here established a biomimetic exosome (Exo) encapsulating dexamethasone sodium phosphate (Dex) nanoparticle (Exo/Dex), whose surface was modified with folic acid (FA)-polyethylene glycol (PEG)-cholesterol (Chol) compound to attain FPC-Exo/Dex active targeting drug delivery system. RESULTS The size of FPC-Exo/Dex was 128.43 ± 16.27 nm, with a polydispersity index (PDI) of 0.36 ± 0.05, and the Zeta potential was - 22.73 ± 0.91 mV. The encapsulation efficiency (EE) of the preparation was 10.26 ± 0.73%, with drug loading efficiency (DLE) of 18.81 ± 2.05%. In vitro study showed this system displayed enhanced endocytosis and excellent anti-inflammation effect against RAW264.7 cells by suppressing pro-inflammatory cytokines and increasing anti-inflammatory cytokine. Further biodistribution study showed the fluorescence intensity of FPC-Exo/Dex was stronger than other Dex formulations in joints, suggesting its enhanced accumulation to inflammation sites. In vivo biodistribution experiment displayed FPC-Exo/Dex could preserve the bone and cartilage of CIA mice better and significantly reduce inflamed joints. Next in vivo safety evaluation demonstrated this biomimetic drug delivery system had no obvious hepatotoxicity and exhibited desirable biocompatibility. CONCLUSION The present study provides a promising strategy for using exosome as nanocarrier to enhance the therapeutic effect of GCs against RA.
Collapse
Affiliation(s)
- Feili Yan
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China
| | - Zhirong Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China
| | - Yao Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China
| | - Yue Feng
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China
- Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, 646000, Luzhou, Sichuan, China
| | - Zhiqiang Mei
- The Research Center for Preclinical Medicine, Southwest Medical University, 646000, Luzhou, Sichuan, China
| | - Hui Li
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China
| | - Xiang Chen
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China
| | - Liang Cai
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China.
- Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, 646000, Luzhou, Sichuan, China.
| | - Chunhong Li
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, 3-319 Zhongshan Road, 646000, Luzhou, Sichuan, People's Republic of China.
- Engineering Research Center in Biomaterials, Sichuan University, 610064, Chengdu, Sichuan, People's Republic of China.
| |
Collapse
|
7
|
Hui B, Yao X, Zhang L, Zhou Q. Dexamethasone sodium phosphate attenuates lipopolysaccharide-induced neuroinflammation in microglia BV2 cells. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:1761-1768. [PMID: 31915845 DOI: 10.1007/s00210-019-01775-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/09/2019] [Indexed: 12/17/2022]
Abstract
Abnormal neuroinflammation ignited by overproduction of chemokines and cytokines via microglial cells can induce the occurrence and development of neurodegenerative disorders. The aim of this study is to investigate the effects of dexamethasone sodium phosphate (Dex-SP) on chemokine and cytokine secretion in lipopolysaccharide (LPS)-activated microglial cells. LPS markedly enhanced the secretion of pro-inflammatory factors such as regulated on activation, normal T cell expressed and secreted (RANTES), transforming growth factor beta-β1 (TGF-β1) and nitric oxide (NO), but decreased the production of macrophage inflammatory protein-1α (MIP-1α) and interleukin 10 (IL-10) in BV-2 microglial cells. Furthermore, LPS increased BV-2 microglial cell migration. However, Dex-SP treatment had the opposite effect, dampening the secretion of RANTES, TGF-β1, and NO, while increasing the production of MIP-1α and IL-10 and blocking migration of LPS-stimulated BV-2 microglial cells. Furthermore, Dex-SP markedly suppressed the LPS-induced degradation of IRAK-1 and IRAK-4, and blocked the activation in TRAF6, p-TAK1, and p-JNK in BV-2 microglial cells. These results showed that Dex-SP inhibited the neuroinflammatory response and migration in LPS-activated BV-2 microglia by inhibiting the secretion of RANTES, TGF-β1, and NO and increasing the production of MIP-1α and IL-10. The molecular mechanism of Dex-SP may be associated with inhibition of TRAF6/TAK-1/JNK signaling pathways mediated by IRAK-1 and IRAK-4.
Collapse
Affiliation(s)
- Bin Hui
- College of Pharmacy, Shanghai University of Medical & Health Sciences, Shanghai, China
- Health School attached to Shanghai University of Medical & Health Sciences, Shanghai, China
| | - Xin Yao
- Jiyuan Shi People's Hospital, Jiyuan, Henan, China
| | - Liping Zhang
- Department of Emergency Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Qinhua Zhou
- College of Medicine, Jiaxing University, Jiaxing, China.
| |
Collapse
|
8
|
Coker SA, Szczepiorkowski ZM, Siegel AH, Ferrari A, Mambrini G, Anand R, Hartman RD, Benatti L, Dumont LJ. A Study of the Pharmacokinetic Properties and the In Vivo Kinetics of Erythrocytes Loaded With Dexamethasone Sodium Phosphate in Healthy Volunteers. Transfus Med Rev 2018. [PMID: 29031409 DOI: 10.1016/j.tmry.2017.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
The objectives of this 2-phase study were to elucidate pharmacokinetics (PK), in vivo 24-hour recovery, and red blood cell (RBC) survival properties of RBC-encapsulated dexamethasone sodium phosphate (DSP) prepared using the EryDex System (EDS). The 24-hour RBC recovery and T50 survival phase studied subjects were randomized to receive autologous RBCs loaded with either 15-20 mg DSP (Group 1A) or sham saline (Group 2A). Loaded RBCs were radiolabeled with 51-Cr, and the labeled RBCs were followed over time in vivo. The PK phase evaluated dose levels of 2.5-5 mg (Group 1B) and 15-20 mg (Group 2B) DSP encapsulated in RBCs infused into healthy randomized subjects. The mean ± SD 24-hour RBC recovery was 77.9% ± 3.3% and 72.7% ± 10.5% for Groups 1A and 2A, respectively. The mean ± SD RBC life span was 84.3 ± 8.3 days in Group 1A and 88.9 ± 6.2 days in Group 2A. The PK phase actual DSP loading doses (mean ± SEM) were 4.2 ± 0.27 mg and 16.9 ± 0.90 mg in Groups 1B and 2B, respectively. Release of dexamethasone from RBCs in vivo peaked at 1 hour, and a sustained release of dexamethasone could be detected until 35 days after the single intravenous infusion in Group 2B. The mean RBC in vivo recovery for DSP-loaded processed cells compares similarly to the 24-hour recovery of regulated RBC products intended for transfusion. There was a minimal but acceptable adverse impact on the survival of EDS-processed RBCs. DSP-loaded autologous RBCs, prepared using the EDS, delivered a sustained dose of dexamethasone in vivo.
Collapse
Affiliation(s)
- Shodeinde A Coker
- Section of Hematology and Oncology and The Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | - Zbigniew M Szczepiorkowski
- Department of Pathology, The Geisel School of Medicine at Dartmouth and The Dartmouth-Hitchcock Medical Center, Lebanon, NH; Institute of Hematology and Transfusion Medicine, Warsaw, Poland
| | - Alan H Siegel
- Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | | | | | | | | | | | - Larry J Dumont
- Department of Pathology, The Geisel School of Medicine at Dartmouth and The Dartmouth-Hitchcock Medical Center, Lebanon, NH.
| |
Collapse
|
9
|
Filipovic N, Saveljic I, Rac V, Graells BO, Bijelic G. Computational and experimental model of transdermal iontophorethic drug delivery system. Int J Pharm 2017; 533:383-388. [PMID: 28576549 DOI: 10.1016/j.ijpharm.2017.05.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 05/07/2017] [Accepted: 05/27/2017] [Indexed: 10/19/2022]
Abstract
The concept of iontophoresis is often applied to increase the transdermal transport of drugs and other bioactive agents into the skin or other tissues. It is a non-invasive drug delivery method which involves electromigration and electroosmosis in addition to diffusion and is shown to be a viable alternative to conventional administration routs such as oral, hypodermic and intravenous injection. In this study we investigated, experimentally and numerically, in vitro drug delivery of dexamethasone sodium phosphate to porcine skin. Different current densities, delivery durations and drug loads were investigated experimentally and introduced as boundary conditions for numerical simulations. Nernst-Planck equation was used for calculation of active substance flux through equivalent model of homogeneous hydrogel and skin layers. The obtained numerical results were in good agreement with experimental observations. A comprehensive in-silico platform, which includes appropriate numerical tools for fitting, could contribute to iontophoretic drug-delivery devices design and correct dosage and drug clearance profiles as well as to perform much faster in-silico experiments to better determine parameters and performance criteria of iontophoretic drug delivery.
Collapse
Affiliation(s)
- Nenad Filipovic
- Faculty of Engineering, University of Kragujevac, Sestre Janjica 6, 34000 Kragujevac, Serbia; BIOIRC Bioengineering Research and Development Center, Kragujevac, Prvoslava Stojanovica 6, 34000 Kragujevac, Serbia.
| | - Igor Saveljic
- Faculty of Engineering, University of Kragujevac, Sestre Janjica 6, 34000 Kragujevac, Serbia; BIOIRC Bioengineering Research and Development Center, Kragujevac, Prvoslava Stojanovica 6, 34000 Kragujevac, Serbia
| | - Vladislav Rac
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Beograd, Zemun, Serbia
| | - Beatriz Olalde Graells
- Fundation Tecnalia Research and Innovation, Parque Científico y Tecnológico de Gipuzkoa, Mikeletegi Pasealekua 2, E-20009 Donostia-San Sebastián, Gipuzkoa, Spain
| | - Goran Bijelic
- Fundation Tecnalia Research and Innovation, Parque Científico y Tecnológico de Gipuzkoa, Mikeletegi Pasealekua 2, E-20009 Donostia-San Sebastián, Gipuzkoa, Spain
| |
Collapse
|
10
|
Khoshnood N, Zamanian A, Massoudi A. Mussel-inspired surface modification of titania nanotubes as a novel drug delivery system. Mater Sci Eng C Mater Biol Appl 2017; 77:748-754. [PMID: 28532088 DOI: 10.1016/j.msec.2017.03.293] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/29/2016] [Accepted: 03/24/2017] [Indexed: 01/28/2023]
Abstract
Titania nanotubes (TNTs) have attracted considerable attention for the development of new devices for local drug delivery applications. In this study TNTs were synthesized by hydrothermal method from titania nanoparticles and then the surface of TNTs were functionalized by in situ polymerization of bioinspired polydopamine (PDA). The proposed strategies emphasized on remarkable properties of these materials and their unique combination to design local drug delivery system with advanced performance. The samples were characterized using Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscope (FESEM), X-ray diffraction pattern (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and surface area analysis (BET). The results showed that the specific surface area significantly is increased by creating tubular nanostructure. TGA results indicated Surface functionalization of TNTs with PDA (TNTs-PDA) about 19.3% that led to increase biocompatibility and bioactivity of TNTs as well as improve drug loading and release properties. It is attributed to the effect of NH2 groups which immobilize drug molecules on the TNTs. According to the obtained release profiles for the samples, the release profiles followed from a Hill model. Thus, PDA modified TNTs can be excellent candidate as specific drug delivery systems.
Collapse
Affiliation(s)
- Negin Khoshnood
- Biomaterials Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Tehran, IRAN
| | - Ali Zamanian
- Biomaterials Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Tehran, IRAN.
| | - Abouzar Massoudi
- Department of Semiconductors, Materials and Energy Research Center (MERC), Tehran, IRAN
| |
Collapse
|
11
|
Nabili M, Shenoy A, Chawla S, Mahesh S, Liu J, Geist C, Zderic V. Ultrasound-enhanced ocular delivery of dexamethasone sodium phosphate: an in vivo study. J Ther Ultrasound 2014; 2:6. [PMID: 24921047 PMCID: PMC4036608 DOI: 10.1186/2050-5736-2-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 02/04/2014] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The eye's unique anatomy and its physiological and anatomical barriers can limit effective drug delivery into the eye. METHODS An in vivo study was designed to determine the effectiveness and safety of ultrasound application in enhancing drug delivery in a rabbit model. Permeability of a steroid ophthalmic drug, dexamethasone sodium phosphate, was investigated in ultrasound- and sham-treated cases. For this study, an eye cup filled with dexamethasone sodium phosphate was placed on the cornea. Ultrasound was applied at intensity of 0.8 W/cm(2) and frequency of 400 or 600 kHz for 5 min. The drug concentration in aqueous humor samples, collected 90 min after the treatment, was determined using chromatography methods. Light microscopy observations were done to determine the structural changes in the cornea as a result of ultrasound application. RESULTS An increase in drug concentration in aqueous humor samples of 2.8 times (p < 0.05) with ultrasound application at 400 kHz and 2.4 times (p < 0.01) with ultrasound application at 600 kHz was observed as compared to sham-treated samples. Histological analysis showed that the structural changes in the corneas exposed to ultrasound predominantly consisted of minor epithelial disorganization. CONCLUSIONS Ultrasound application enhanced the delivery of an anti-inflammatory ocular drug, dexamethasone sodium phosphate, through the cornea in vivo. Ultrasound-enhanced ocular drug delivery appears to be a promising area of research with a potential future application in a clinical setting.
Collapse
Affiliation(s)
- Marjan Nabili
- Department of Electrical and Computer Engineering, George Washington University, Washington, DC 20052, USA
| | - Aditi Shenoy
- Department of Electrical and Computer Engineering, George Washington University, Washington, DC 20052, USA
| | - Shawn Chawla
- Department of Electrical and Computer Engineering, George Washington University, Washington, DC 20052, USA
| | | | - Ji Liu
- Department of Ophthalmology, George Washington University, Washington, DC 20052, USA
| | - Craig Geist
- Department of Ophthalmology, George Washington University, Washington, DC 20052, USA
| | - Vesna Zderic
- Department of Electrical and Computer Engineering, George Washington University, Washington, DC 20052, USA
| |
Collapse
|