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Preparation and characterization of
pH
and thermally responsive perfluoropolyether acrylate copolymer micelles and investigation its drug‐loading properties. J Appl Polym Sci 2023. [DOI: 10.1002/app.53805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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Singh V, Eljaaly K, Md S, Alhakamy NA, Kesharwani P. Triblock copolymeric drug delivery as an emerging nanocarrier for treatment of infectious diseases. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sadat Akhavi S, Moradi Dehaghi S. Drug Delivery of Amphotericin B through Core-Shell Composite Based on PLGA/Ag/Fe 3O 4: In Vitro Test. Appl Biochem Biotechnol 2019; 191:496-510. [PMID: 31797150 DOI: 10.1007/s12010-019-03181-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 11/11/2019] [Indexed: 12/15/2022]
Abstract
This research aimed at developing and designing a slow and targeted delivery of Amphotericin B (AmB) antibiotic by placing three types of shells containing different ratios of biodegradable and biocompatible polymers poly (D, L-lactide)-co-(glycolide) (PLGA), polyethylene glycol (PEG), and polyvinyl pyrrolidone (PVP) on core-shell structures including silver nanoparticles that were activated with magnetic nanoparticles (MNPs). Emulsion solvent evaporation technique was employed to synthesize three types of shells: (i) (PVP-PEG) (100:20, w/w), (ii) (PLGA-PEG) (100:20, w/w), and (iii) (PLGA-PEG) (50:10, w/w) introduced as D1, D2, and D3 respectively. The in vitro release of AmB was examined in aqueous medium phosphate buffer saline (PBS) in pH~ 7.2. Several spectroscopy methods characterized the structure and properties of the nanoparticles. In vitro antifungal activity of pure AmB and D1, D2, and D3 was studied against Candida albicans (C. albicans). The results explained that frequency of drug released from D2 at the first 10 h was (18%) that was compared with D1 (30%) and D3 (24%) at the same time. D2 had more efficient and longer targeted controlled release. The findings showed that D2 can be used as an effective carrier for in vitro targeted controlled release and D2 and D3 had powerful activity against C. albicans.
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Affiliation(s)
- Shiva Sadat Akhavi
- Department of Chemistry, Islamic Azad University, Tehran North Branch, Tehran, Iran
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Xu P, Wang H, Hu H, Ye Y, Dong Y, Li S, Mei D, Guo Z, Wang D, Sun Y, Yu T, Qiao J, Zhang Q. cRGDfK-Grafted Small-Size Quercetin Micelles For Enhancing Therapy Efficacy Of Active Ingredient From The Chinese Medicinal Herb. Int J Nanomedicine 2019; 14:9173-9184. [PMID: 31819425 PMCID: PMC6886538 DOI: 10.2147/ijn.s219578] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 11/01/2019] [Indexed: 11/23/2022] Open
Abstract
Background As an active ingredient of Chinese herbal medicine, quercetin (QU) can significantly induce apoptosis of tumor cells and give play to other effect such as decreasing both fibroblast population and collagen in cancer cell nest. However, the antitumor efficacy of quercetin was mostly evaluated at cellular level and rarely developed in vivo by intravenous injection, which may be ascribed to its inferior physicochemical properties including water insolubility, short plasma half-time, and insufficient enrichment in the tumor tissues. Methods The DSPE-PEG was used to construct quercetin-loaded micelles, and the integrin ligand cRGDfK was grafted to modify the nanocarrier for enhancing its cancer-specific homing. The MALDI-TOF-MS, DLS, TEM, and UV were orderly operated to characterize guidance molecules and micelles by morphology, size distribution, Zeta potential, and drug encapsulation efficiency. In addition, the surface plasmon resonance study and real-time confocal analysis were employed to demonstrate αvβ3 integrin-overexpressing B16 cells-specific binding and uptake. After further pharmacodynamics studies in vitro and in vivo, we also evaluate systemic toxicity about cRGDfK-PM-QU. Results The cRGDfK was successfully stitched with DSPE-PEG and modified on the surface of micelles. The ligand modification enhanced the negative charges of the micelles, but it did not induce significant changes in particle size. The quercetin micelles were about 15 nm in size and negatively charged, and had spherical morphology and high drug encapsulation efficiency. In vitro, the cRGDfK-modified micelles (cRGDfK-PM) showed αvβ3 integrin-overexpressing B16 cells-specific binding and uptake, and cRGDfK-PM-QU (QU loaded in cRGDfK-PM) induced more significant cell apoptosis and cytotoxic effects against B16 tumor cells than counterpart micelles (PM-QU). In vivo, the cRDGfK modification enhanced enrichment in B16 tumor tissue, improved the therapeutic efficacy of the quercetin-loaded micelles against B16 tumor, and exhibited lower systemic and pulmonary toxicity compared with counterpart micelles in the mouse mode. Conclusion Quercetin as a natural product has triggered increasing interest in the antitumor field. In this study, cRGDfK-modified DSPE-PEG micelles significantly optimized quercetin therapeutic efficacy and pulmonary toxicity as well as lowered systemic toxicity.
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Affiliation(s)
- Pengcheng Xu
- Department of Pharmaceutical Engineering, College of Pharmacy, Inner Mongolia Medical University, Hohhot 010110, People's Republic of China
| | - Haisheng Wang
- Department of Biochemistry, College of Basic Medical Sciences, Inner Mongolia Medical University, Hohhot 010110, People's Republic of China
| | - Hongxiang Hu
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, People's Republic of China
| | - Yong Ye
- Department of Pharmaceutics, College of Pharmacy, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Yu Dong
- Department of Pharmaceutical Engineering, College of Pharmacy, Inner Mongolia Medical University, Hohhot 010110, People's Republic of China
| | - Suxin Li
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, People's Republic of China
| | - Dong Mei
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, People's Republic of China
| | - Zhaoming Guo
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, People's Republic of China
| | - Dan Wang
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, People's Republic of China
| | - Yanxue Sun
- Department of Pharmaceutical Engineering, College of Pharmacy, Inner Mongolia Medical University, Hohhot 010110, People's Republic of China
| | - Tengfei Yu
- Department of Pharmaceutical Engineering, College of Pharmacy, Inner Mongolia Medical University, Hohhot 010110, People's Republic of China
| | - Junchan Qiao
- Department of Pharmaceutical Engineering, College of Pharmacy, Inner Mongolia Medical University, Hohhot 010110, People's Republic of China
| | - Qiang Zhang
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, People's Republic of China
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Tambe P, Kumar P, Paknikar KM, Gajbhiye V. Smart triblock dendritic unimolecular micelles as pioneering nanomaterials: Advancement pertaining to architecture and biomedical applications. J Control Release 2019; 299:64-89. [DOI: 10.1016/j.jconrel.2019.02.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 11/08/2022]
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Yu Y, Peng L, Liao G, Chen Z, Li C. Noncovalent Complexation of Amphotericin B with Poly(β-Amino Ester) Derivates for Treatment of C. Neoformans Infection. Polymers (Basel) 2019; 11:polym11020270. [PMID: 30960254 PMCID: PMC6419036 DOI: 10.3390/polym11020270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/23/2019] [Accepted: 01/30/2019] [Indexed: 01/15/2023] Open
Abstract
Our goal was to improve treatment outcomes for C. neoformans infection by designing nanocarriers that enhance drug-encapsulating capacity and stability. Thus, a noncovalent complex of methoxy poly(ethylene glycol)-poly(lactide)-poly(β-amino ester) (MPEG-PLA-PAE) and amphotericin B (AMB) was developed and characterized. The MPEG-PLA-PAE copolymer was synthesized by a Michael-type addition reaction; the copolymer was then used to prepare the AMB-loaded nanocomplex. AMB was in a highly aggregated state within complex cores. A high encapsulation efficiency (>90%) and stability of the AMB-loaded nanocomplex were obtained via electrostatic interaction between AMB and PAE blocks. This nanocomplex retained drug activity against C. neoformans in vitro. Compared with micellar AMB, the AMB nanocomplex was more efficient in terms of reducing C. neoformans burden in lungs, liver, and spleen, based on its improved biodistribution. The AMB/MPEG-PLA-PAE complex with enhanced drug-loading capacity and stability can serve as a platform for effective treatment of C. neoformans infection.
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Affiliation(s)
- Yang Yu
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
| | - Li Peng
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
| | - Guojian Liao
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
| | - Zhangbao Chen
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
| | - Chong Li
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
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Heinz D, Amado E, Kressler J. Polyphilicity-An Extension of the Concept of Amphiphilicity in Polymers. Polymers (Basel) 2018; 10:E960. [PMID: 30960885 PMCID: PMC6403972 DOI: 10.3390/polym10090960] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 08/23/2018] [Accepted: 08/23/2018] [Indexed: 12/12/2022] Open
Abstract
Recent developments in synthetic pathways as simple reversible-deactivation radical polymerization (RDRP) techniques and quantitative post-polymerization reactions, most notoriously 'click' reactions, leading to segmented copolymers, have broadened the molecular architectures accessible to polymer chemists as a matter of routine. Segments can be blocks, grafted chains, branchings, telechelic end-groups, covalently attached nanoparticles, nanodomains in networks, even sequences of random copolymers, and so on. In this review, we describe the variety of the segmented synthetic copolymers landscape from the point of view of their chemical affinity, or synonymous philicity, in bulk or with their surroundings, such as solvents, permeant gases, and solid surfaces. We focus on recent contributions, current trends, and perspectives regarding polyphilic copolymers, which have, in addition to hydrophilic and lipophilic segments, other philicities, for example, towards solvents, fluorophilic entities, ions, silicones, metals, nanoparticles, and liquid crystalline moieties.
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Affiliation(s)
- Daniel Heinz
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
| | - Elkin Amado
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
| | - Jörg Kressler
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
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Novel biodegradable poly(gamma-glutamic acid)–amphotericin B complexes show promise as improved amphotericin B formulations. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:1773-1783. [DOI: 10.1016/j.nano.2017.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 01/31/2017] [Accepted: 02/03/2017] [Indexed: 12/11/2022]
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Mobasheri M, Attar H, Rezayat Sorkhabadi SM, Khamesipour A, Jaafari MR. Solubilization Behavior of Polyene Antibiotics in Nanomicellar System: Insights from Molecular Dynamics Simulation of the Amphotericin B and Nystatin Interactions with Polysorbate 80. Molecules 2015; 21:E6. [PMID: 26712721 PMCID: PMC6273564 DOI: 10.3390/molecules21010006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 01/23/2023] Open
Abstract
Amphotericin B (AmB) and Nystatin (Nys) are the drugs of choice for treatment of systemic and superficial mycotic infections, respectively, with their full clinical potential unrealized due to the lack of high therapeutic index formulations for their solubilized delivery. In the present study, using a coarse-grained (CG) molecular dynamics (MD) simulation approach, we investigated the interaction of AmB and Nys with Polysorbate 80 (P80) to gain insight into the behavior of these polyene antibiotics (PAs) in nanomicellar solution and derive potential implications for their formulation development. While the encapsulation process was predominantly governed by hydrophobic forces, the dynamics, hydration, localization, orientation, and solvation of PAs in the micelle were largely controlled by hydrophilic interactions. Simulation results rationalized the experimentally observed capability of P80 in solubilizing PAs by indicating (i) the dominant kinetics of drugs encapsulation over self-association; (ii) significantly lower hydration of the drugs at encapsulated state compared with aggregated state; (iii) monomeric solubilization of the drugs; (iv) contribution of drug-micelle interactions to the solubilization; (v) suppressed diffusivity of the encapsulated drugs; (vi) high loading capacity of the micelle; and (vii) the structural robustness of the micelle against drug loading. Supported from the experimental data, our simulations determined the preferred location of PAs to be the core-shell interface at the relatively shallow depth of 75% of micelle radius. Deeper penetration of PAs was impeded by the synergistic effects of (i) limited diffusion of water; and (ii) perpendicular orientation of these drug molecules with respect to the micelle radius. PAs were solvated almost exclusively in the aqueous poly-oxyethylene (POE) medium due to the distance-related lack of interaction with the core, explaining the documented insensitivity of Nys solubilization to drug-core compatibility in detergent micelles. Based on the obtained results, the dearth of water at interior sites of micelle and the large lateral occupation space of PAs lead to shallow insertion, broad radial distribution, and lack of core interactions of the amphiphilic drugs. Hence, controlled promotion of micelle permeability and optimization of chain crowding in palisade layer may help to achieve more efficient solubilization of the PAs.
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Affiliation(s)
- Meysam Mobasheri
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
| | - Hossein Attar
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
- Tofigh Daru Research and Engineering Company (TODACO), Tehran 1397116359, Iran.
| | - Seyed Mehdi Rezayat Sorkhabadi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran 1417755469, Iran.
- Department of Toxicology and Pharmacology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran 193956466, Iran.
| | - Ali Khamesipour
- Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, Tehran 1416613675, Iran.
| | - Mahmoud Reza Jaafari
- Biotechnology Research Center, Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, P. O. Box: 91775-1365, Mashhad 917751365, Iran.
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Zia Q, Khan AA, Swaleha Z, Owais M. Self-assembled amphotericin B-loaded polyglutamic acid nanoparticles: preparation, characterization and in vitro potential against Candida albicans. Int J Nanomedicine 2015; 10:1769-90. [PMID: 25784804 PMCID: PMC4356689 DOI: 10.2147/ijn.s63155] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In the present study, we developed a self-assembled biodegradable polyglutamic acid (PGA)-based formulation of amphotericin B (AmB) and evaluated its in vitro antifungal potential against Candida albicans. The AmB-loaded PGA nanoparticles were prepared in-house and had a mean size dimension of around 98±2 nm with a zeta potential of -35.2±7.3 mV. Spectroscopic studies revealed that the drug predominantly acquires an aggregated form inside the formulation with an aggregation ratio above 2. The PGA-based AmB formulation was shown to be highly stable in phosphate-buffered saline as well as in serum (only 10%-20% of the drug was released after 10 days). The AmB-PGA nanoparticles were less toxic to red blood cells (<15% lysis at an AmB concentration of 100 μg/mL after 24 hours) when compared with Fungizone(®), a commercial antifungal product. An MTT assay showed that the viability of mammalian cells (KB and RAW 264.7) was negligibly affected at AmB concentrations as high as 200 μg/mL. Histopathological examination of mouse kidney revealed no signs of tissue necrosis. The AmB-PGA formulation showed potent antimicrobial activity similar to that of Fungizone against C. albicans. Interestingly, AmB-bearing PGA nanoparticles were found to inhibit biofilm formation to a considerable extent. In summary, AmB-PGA nanoparticles showed highly attenuated toxicity when compared with Fungizone, while retaining equivalent active antifungal properties. This study indicates that the AmB-PGA preparation could be a promising treatment for various fungal infections.
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Affiliation(s)
- Qamar Zia
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Aijaz Ahmed Khan
- Department of Anatomy, Aligarh Muslim University, Aligarh, India
| | - Zubair Swaleha
- Women's College, Aligarh Muslim University, Aligarh, India
| | - Mohammad Owais
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
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Tucker W, McCoy AM, Fix S, Stagg M, Murphy M, Mecozzi S. Synthesis, physicochemical characterization, and self-assembly of linear, dibranched, and miktoarm semifluorinated triphilic polymers. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY 2014; 52:3324-3336. [PMID: 31223200 PMCID: PMC6586239 DOI: 10.1002/pola.27394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Linear, dibranched and miktoarm amphiphiles containing both hydrophobic and fluorophilic moieties were synthesized and characterized in an attempt to elucidate the relationship between semi-fluorinated amphiphile structure and aggregate behaviour in aqueous solution. For the linear and dibranched amphiphiles, there was an exponential decrease in critical aggregation concentration (CMC) and a logarithmic increase in core microviscosity with increasing length of the fluorocarbon segments; while the miktoarm architecture produced no notable trend in microviscosity or CMC. Furthermore, the linear and dibranched surfactants showed enhanced kinetic stability, dissociating more slowly in the presence of human serum than did either the dibranched or miktoarm amphiphiles. Finally, encapsulation studies with the hydrophobic drug paclitaxel (PTX) showed that the ability to solubilize and retain PTX increased with the presence and with the increasing size of the fluorocarbon moiety for both the linear and dibranched amphiphiles, while no such trend was observed for the miktoarm amphiphiles.
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Affiliation(s)
- W.B. Tucker
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706
| | - A. M. McCoy
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706
| | - S.M. Fix
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706
| | - M.F. Stagg
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706
| | - M.M. Murphy
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706
| | - S. Mecozzi
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705
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Al-Quadeib BT, Radwan MA, Siller L, Horrocks B, Wright MC. Stealth Amphotericin B nanoparticles for oral drug delivery: In vitro optimization. Saudi Pharm J 2014; 23:290-302. [PMID: 26106277 PMCID: PMC4475820 DOI: 10.1016/j.jsps.2014.11.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/11/2014] [Indexed: 02/06/2023] Open
Abstract
Purpose Amphotericin B (AmB) is an effective anti-fungal and anti-leishmanial agent. However, AmB has low oral bioavailability (0.3%) and adverse effects (e.g., nephrotoxicity). The objectives of this study were to improve the oral bioavailability by entrapping AmB in pegylated (PEG) poly lactide co glycolide copolymer (PLGA–PEG) nanoparticles (NPs). The feasibility of different surfactants and stabilizers on the mean particle size (MPS) and entrapment efficiency were also investigated. Materials and methods NPs of AmB were prepared by a modified emulsification diffusion method employing a vitamin E derivative as a stabilizer. Physicochemical properties and particle size characterization were evaluated using Fourier Transform Infra-Red spectroscopy (FTIR), differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. Moreover, in vitro dissolution profiles were performed for all formulated AmB NPs. Results MPS of the prepared spherical particles of AmB ranged from 26.4 ± 2.9 to 1068 ± 489.8 nm. An increased stirring rate favored AmB NPs with a smaller MPS. There was a significant reduction in MPS, drug content and drug release, when AmB NPs were prepared using the diblock polymer PLGA–PEG with 15% PEG. Addition of three emulsifying agents poly vinyl pyrrolidone (PVP), Vitamin E (TPGS) and pluronic F-68 to AmB formulations led to a significant reduction in particle size and increase in drug entrapment efficiency (DEE) compared to addition of PVP alone. FTIR spectroscopy demonstrated a successful loading of AmB to pegylated PLGA–PEG copolymers. PLGA–PEG copolymer entrapment efficiency of AmB was increased up to 56.7%, with 92.7% drug yield. After a slow initial release, between 20% and 54% of AmB was released in vitro within 24 h phosphate buffer containing 2% sodium deoxycholate and were best fit Korsmeyer–Peppas model. In conclusion, PLGA–PEG diblock copolymer with 15% PEG produced a significant reduction (>70%) in MPS with highest drug content. The percentage of PEG in the copolymer and the surfactant/stabilizer used had a direct effect on AmB release in vitro, entrapment efficiency and MPS. These developed formulations are feasible, effective and improved alternatives to other carriers for oral delivery of AmB.
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Affiliation(s)
- Bushra T Al-Quadeib
- Department of Pharmaceutics, Pharmacy College, King Saud University, Saudi Arabia
| | - Mahasen A Radwan
- Department of Pharmaceutical Practice, Princess Nourah bint Abdelrahman University, Saudi Arabia
| | - Lidija Siller
- School of Chemical Engineering and Advanced Materials, Herschel Building, Newcastle University, UK
| | - Benjamin Horrocks
- School of Chemical Engineering and Advanced Materials, Herschel Building, Newcastle University, UK
| | - Matthew C Wright
- Institute of Cellular Medicine, Leech Building, Medical School, Newcastle University, UK
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Decato S, Bemis T, Madsen E, Mecozzi S. Synthesis and characterization of perfluoro- tert-butyl semifluorinated amphiphilic polymers and their potential application in hydrophobic drug delivery. Polym Chem 2014; 5:6461-6471. [PMID: 25383100 DOI: 10.1039/c4py00882k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Semifluorinated polymer surfactants, composed of a monomethyl poly(ethylene glycol) (mPEG) hydrophilic head group and either 1, 2, or 3 perfluoro-tert-butyl (PFtB) groups as the fluorophilic tail, were synthesized, and their aqueous self-assemblies were investigated as a potential design for theranostic nanoparticles. Polymers with three PFtB groups (PFtBTRI) solely formed stable, spherical micelles, approximately 12 nm in size. These PFtBTRI surfactants demonstrate similar characteristics with those of polymers with linear perfluorocarbon tails, despite large differences in tail structure. For example, PFtB polymer solutions stably emulsified 20 v/v% sevoflurane with perfluorooctyl bromide (PFOB) as a stabilizer. However, these PFtB polymers have the additional potential to serve as F-MRI contrast agents. PFtBTRI micelles gave one narrow 19F-NMR signal in D2O, with T1 and T2 parameters of approximately 500 and 100 ms, respectively. 19F-MR images of PFtB polymer solutions at 1 mM gave intense signal at 4.7 T without sensitizers or selective excitation sequences. These preliminary data demonstrate the potential of PFtB polymers as a basic design, which can be further modified to serve as dual drug-delivery and imaging vehicles.
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Affiliation(s)
- Sarah Decato
- Department of Chemistry, University of Wisconsin - Madison, Madison, Wisconsin 53706
| | - Troy Bemis
- Department of Chemistry, University of Wisconsin - Madison, Madison, Wisconsin 53706
| | - Eric Madsen
- Department of Chemistry, University of Wisconsin - Madison, Madison, Wisconsin 53706
| | - Sandro Mecozzi
- School of Pharmacy, University of Wisconsin - Madison, Madison Wisconsin 53705
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Behl G, Sikka M, Chhikara A, Chopra M. PEG-coumarin based biocompatible self-assembled fluorescent nanoaggregates synthesized via click reactions and studies of aggregation behavior. J Colloid Interface Sci 2013; 416:151-60. [PMID: 24370415 DOI: 10.1016/j.jcis.2013.10.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 10/25/2013] [Accepted: 10/26/2013] [Indexed: 01/08/2023]
Abstract
HYPOTHESIS Click chemistry has found wide application in drug discovery, bioconjugation reactions, polymer chemistry and synthesis of amphiphilic materials with pharmaceutical and biomedical applications. Triazole substitution via a click reaction alters photophysical properties of coumarin. Both coumarin and triazole moieties participate in π-π stacking interactions. Hence it should be possible to prepare fluorescent self-assembly systems by conjugation of coumarin to poly (ethylene glycol) (PEG) via click reactions exhibiting hydrophilic, hydrophobic and π-π stacking interactions. Moreover, the materials can be suitable platforms to assess fluorescence modulation effect of triazole substitution on coumarins. EXPERIMENTS PEG supported coumarin conjugates were synthesized and the fluorescence modulation effect of the formation of triazole on coumarin was assessed. Their aggregation properties were studied by surface tension measurements, dynamic light scattering (DLS), transmission electron microscopy (TEM), fluorescence and (1)H NMR spectroscopy. FINDINGS The conjugates were found to form nanoaggregates in the size range of 100-120 nm with a negative free energy of micellization (~-27 kJ mol(-1)) confirming aggregation and self-assembly. The Quantum yield of 4-methyl-7-propargylcoumarin (7P4MC) was enhanced after triazole formation with azide functionalized PEG (methoxy-PEG350 azide). The conjugates were found to exhibit π-π stacking interactions in addition to hydrophilic and hydrophobic interactions. They were found to be biocompatible with human pancreatic cancer cells.
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Affiliation(s)
- Gautam Behl
- Department of Chemistry, Dyal Singh College, University of Delhi, Lodhi Road, Delhi 110003, India
| | - Manisha Sikka
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Aruna Chhikara
- Department of Chemistry, Dyal Singh College, University of Delhi, Lodhi Road, Delhi 110003, India.
| | - Madhu Chopra
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India.
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Zou P, Chen H, Paholak HJ, Sun D. Noninvasive fluorescence resonance energy transfer imaging of in vivo premature drug release from polymeric nanoparticles. Mol Pharm 2013; 10:4185-94. [PMID: 24033270 DOI: 10.1021/mp4002393] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding in vivo drug release kinetics is critical for the development of nanoparticle-based delivery systems. In this study, we developed a fluorescence resonance energy transfer (FRET) imaging approach to noninvasively monitor in vitro and in vivo cargo release from polymeric nanoparticles. The FRET donor dye (DiO or DiD) and acceptor dye (DiI or DiR) were individually encapsulated into poly(ethylene oxide)-b-polystyrene (PEO-PS) nanoparticles. When DiO (donor) nanoparticles and DiI (acceptor) nanoparticles were coincubated with cancer cells for 2 h, increased FRET signals were observed from cell membranes, suggesting rapid release of DiO and DiI to cell membranes. Similarly, increased FRET ratios were detected in nude mice after intravenous coadministration of DiD (donor) nanoparticles and DiR (acceptor) nanoparticles. In contrast, another group of nude mice i.v. administrated with DiD/DiR coloaded nanoparticles showed decreased FRET ratios. Based on the difference in FRET ratios between the two groups, in vivo DiD/DiR release half-life from PEO-PS nanoparticles was determined to be 9.2 min. In addition, it was observed that the presence of cell membranes facilitated burst release of lipophilic cargos while incorporation of oleic acid-coated iron oxide into PEO-PS nanoparticles slowed the release of DiD/DiR to cell membranes. The developed in vitro and in vivo FRET imaging techniques can be used to screening stable nanoformulations for lipophilic drug delivery.
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Affiliation(s)
- Peng Zou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan , Ann Arbor, Michigan 48109, United States
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Mohamed-Ahmed AHA, Les KA, Seifert K, Croft SL, Brocchini S. Noncovalent complexation of amphotericin-B with Poly(α-glutamic acid). Mol Pharm 2013; 10:940-50. [PMID: 23234235 DOI: 10.1021/mp300339p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A noncovalent complex of amphotericin B (AmB) and poly(α-glutamic acid) (PGA) was prepared to develop a safe and stable formulation for the treatment of leishmaniasis. The loading of AmB in the complex was in the range of ∼20-50%. AmB was in a highly aggregated state with an aggregation ratio often above 2.0. This complex (AmB-PGA) was shown to be stable and to have reduced toxicity to human red blood cells and KB cells compared to the parent compound; cell viability was not affected at an AmB concentration as high as 50 and 200 μg/mL respectively. This AmB-PGA complex retained AmB activity against intracellular Leishmania major amastigotes in the differentiated THP-1 cells with an EC50 of 0.07 ± 0.03-0.08 ± 0.01 μg/mL, which is similar to Fungizone (EC50 of 0.06 ± 0.01 μg/mL). The in vitro antileishmanial activity of the complex against Leishmania donovani was retained after storage at 37 °C for 7 days in the form of a solution (EC50 of 0.27 ± 0.03 to 0.35 ± 0.04 μg/mL) and for 30 days as a solid (EC50 of 0.41 ± 0.07 to 0.63 ± 0.25 μg/mL). These encouraging results indicate that the AmB-PGA complex has the potential for further development.
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Affiliation(s)
- Abeer H A Mohamed-Ahmed
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, U.K
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