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Chan HW, Zhang X, Chow S, Lam DCL, Chow SF. Inhalable paclitaxel nanoagglomerate dry powders for lung cancer chemotherapy: Design of experiments-guided development, characterization and in vitro evaluation. Int J Pharm 2024; 653:123877. [PMID: 38342326 DOI: 10.1016/j.ijpharm.2024.123877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 01/12/2024] [Accepted: 02/02/2024] [Indexed: 02/13/2024]
Abstract
Conventional intravenous chemotherapy for lung cancer frequently results in inefficient drug penetration into primary lung tumors and severe systemic toxicities. This study reports the development of inhalable paclitaxel (PTX) nanoagglomerate dry powders (PTX-NADP) for enhanced pulmonary delivery of PTX chemotherapy to lung tumors using full factorial Design of Experiments. PTX nanoparticles were fabricated by flash nanoprecipitation with the aid of N-polyvinylpyrrolidone (PVP) and curcumin (CUR) as stabilizer and co-stabilizer respectively, and subsequently agglomerated into inhalable dry powders via co-spray drying with methylcellulose. The optimized PTX-NADP formulation exhibited acceptable aqueous redispersibility (redispersibility index = 1.17 ± 0.02) into ∼ 150 nm nanoparticles and superb in vitro aerosol performance [mass median aerodynamic diameter (MMAD) = 1.69 ± 0.05 µm and fine particle fraction (FPF) of 70.89 ± 1.72 %] when dispersed from a Breezhaler® at 90 L/min. Notably, adequate aerosolization (MMAD < 3.5 µm and FPF > 40 %) of the optimized formulation was maintained when dispersed at reduced inspiratory flow rates of 30 - 60 L/min. Redispersed PTX nanoparticles from PTX-NADP demonstrated enhanced in vitro antitumor efficacy and cellular uptake in A549 lung adenocarcinoma cells without compromising tolerability of BEAS-2B normal lung epithelial cells towards PTX chemotherapy. These findings highlight the potential of inhaled PTX-NADP therapy to improve therapeutic outcomes for lung cancer patients with varying levels of pulmonary function impairment.
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Affiliation(s)
- Ho Wan Chan
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Xinyue Zhang
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China; Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, Hong Kong, China
| | - Stephanie Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - David Chi Leung Lam
- Department of Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China; Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, Hong Kong, China.
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2
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Chan HW, Lee HW, Chow S, Lam DCL, Chow SF. Integrated continuous manufacturing of inhalable remdesivir nanoagglomerate dry powders: Design, optimization and therapeutic potential for respiratory viral infections. Int J Pharm 2023; 644:123303. [PMID: 37579825 DOI: 10.1016/j.ijpharm.2023.123303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 07/24/2023] [Accepted: 08/09/2023] [Indexed: 08/16/2023]
Abstract
While inhalable nanoparticle-based dry powders have demonstrated promising potential as next-generation respiratory medicines, erratic particle redispersibility and poor manufacturing reproducibility remain major hurdles hindering their translation from bench to bedside. We developed a one-step continuous process for fabricating inhalable remdesivir (RDV) nanoagglomerate dry powder formulations by integrating flash nanoprecipitation and spray drying. The nanosuspension formulation was optimized using a three-factor Box-Behnken design with a z-average particle size of 233.3 ± 2.3 nm and < 20% size change within six hours. The optimized inhalable nanoagglomerate dry powder formulation produced by spray drying showed adequate aqueous redispersibility (Sf/Si = 1.20 ± 0.01) and in vitro aerosol performance (mass median aerodynamic diameter of 3.80 ± 0.58 µm and fine particle fraction of 39.85 ± 10.16%). In A549 cells, RDV nanoparticles redispersed from the inhalable nanoagglomerate powders displayed enhanced and accelerated RDV cell uptake and negligible cytotoxicity at therapeutic RDV concentrations. No statistically significant differences were observed in the critical quality attributes of the inhalable nanoagglomerate powders produced from the continuous manufacturing and standalone batch modes. This work demonstrates the feasibility of large-scale continuous manufacturing of inhalable nanoagglomerate dry powder formulations, which pave the way for their clinical translation.
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Affiliation(s)
- Ho Wan Chan
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hok Wai Lee
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Stephanie Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - David Chi Leung Lam
- Department of Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China; Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, Hong Kong SAR, China.
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3
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Weng J, Shao Z, Chan HW, Li SPY, Lam JKW, Tsang CK, Chow SF. Mediating bio-fate of polymeric cholecalciferol nanoparticles through rational size control. BIOMATERIALS ADVANCES 2022; 140:213074. [PMID: 35970111 DOI: 10.1016/j.bioadv.2022.213074] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/26/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Whilst 10-200 nm polymeric nanoparticles hold enormous medical potential, successful clinical translation remains scarce. There is an inadequate understanding of how these nanoparticles could be fabricated with consistent particle architecture in this size range, as well as their corresponding biological performance. We seek to fill this important knowledge gap by employing Design of Experiment (DoE) to examine critical formulation and processing parameters of cholecalciferol (VitD3)-loaded nanoparticles by flash nanoprecipitation (FNP). Based on the regression analysis of the critical processing parameters, six VitD3 nanoparticle formulations with z-average particle sizes between 40 and 150 nm were successfully developed, possessing essentially the same particle shape and zeta potential. To evaluate the effect of particle size on the in vivo performance, not only VitD3 but also its active metabolites (25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3) were assayed in the biodistribution study. Results indicated that VitD3 nanoparticles with sizes ≤110 nm would achieve higher plasma retention. VitD3 nanoparticles with sizes of 40 nm and 150 nm were superior for lung deposition, while particle size had no major role in the brain uptake of VitD3 nanoparticles. The present study demonstrates the value of DoE for generating size-tunable nanoparticles with controlled particle properties in FNP and offers important insights into the particle size effect of nanoparticles <200 nm on their therapeutic potential.
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Affiliation(s)
- Jingwen Weng
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Zitong Shao
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Ho Wan Chan
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Steve Po Yam Li
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Jenny Ka Wing Lam
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China; Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, Hong Kong, China
| | - Chi Kwan Tsang
- Clinical Neuroscience Institute, the First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China; Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, Hong Kong, China.
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4
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Mixing efficiency affects the morphology and compactness of chitosan/tripolyphosphate nanoparticles. Carbohydr Polym 2022; 287:119331. [DOI: 10.1016/j.carbpol.2022.119331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 02/22/2022] [Accepted: 03/06/2022] [Indexed: 11/17/2022]
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Zhang X, Chau LY, Chan HW, Weng J, Wong KW, Chow SF, Chow AHL. Physical stability and in vivo brain delivery of polymeric ibuprofen nanoparticles fabricated by flash nanoprecipitation. Int J Pharm 2021; 598:120224. [PMID: 33486028 DOI: 10.1016/j.ijpharm.2021.120224] [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] [Received: 09/14/2020] [Revised: 12/06/2020] [Accepted: 12/24/2020] [Indexed: 01/16/2023]
Abstract
Ibuprofen (IBP), a common non-steroidal anti-inflammatory drug (NSAID) with a log P of 3.51, has been shown to possess potential benefit in the treatment of Alzheimer's disease. However, the bioavailability of IBP to the brain is poor, which can be linked to its extensive binding to plasma proteins in the blood. This study aimed to evaluate the nanoparticle production of IBP by flash nanoprecipitation (FNP) technology, and to determine whether the nanoparticles prepared by FNP could enhance the delivery of IBP into the brain. Polymeric IBP nanoparticles were prepared with poly(ethylene glycol)-poly(lactic acid) (PEG-PLA) diblock copolymer as stabilizer under optimized conditions using a four-stream multi-inlet vortex mixer (MIVM). The optimized nanoparticles displayed a mean particle size of around 50 nm, polydispersity index of around 0.2, drug loading of up to 30% and physical stability of up to 34 days. In-depth surface characterization using zeta potential measurement, atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) showed that the surfaces of these nanoparticles were covered with the hydrophilic PEG groups from the diblock copolymer. In vivo brain uptake study of the IBP nanoparticles indicated that the particles, when coated with polysorbate 80, displayed an enhanced brain uptake. However, the extent of brain uptake enhancement appeared limited, possibly due to a rapid release of IBP from the nanoparticles into the blood stream following intravenous administration.
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Affiliation(s)
- Xinran Zhang
- School of Pharmacy, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - Li Yin Chau
- School of Pharmacy, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - Ho Wan Chan
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region
| | - Jingwen Weng
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region
| | - Ka Wai Wong
- Genvida (HK) Company Limited, Hong Kong Special Administrative Region
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region.
| | - Albert Hee Lum Chow
- School of Pharmacy, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region.
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Chen Z, Fu Z, Li L, Ma E, Guo X. A Cost-Effective Nano-Sized Curcumin Delivery System with High Drug Loading Capacity Prepared via Flash Nanoprecipitation. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:734. [PMID: 33803989 PMCID: PMC8001153 DOI: 10.3390/nano11030734] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/23/2021] [Accepted: 03/10/2021] [Indexed: 12/24/2022]
Abstract
Flash nanoprecipitation (FNP) is an efficient technique for encapsulating drugs in particulate carriers assembled by amphiphilic polymers. In this study, a novel nanoparticular system of a model drug curcumin (CUR) based on FNP technique was developed by using cheap and commercially available amphiphilic poly(vinyl pyrrolidone) (PVP) as stabilizer and natural polymer chitosan (CS) as trapping agent. Using this strategy, high encapsulation efficiency (EE > 95%) and drug loading capacity (DLC > 40%) of CUR were achieved. The resulting CUR-loaded nanoparticles (NPs) showed a long-term stability (at least 2 months) and pH-responsive release behavior. This work offers a new strategy to prepare cost-effective drug-loaded NPs with high drug loading capacity and opens a unique opportunity for industrial scale-up.
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Affiliation(s)
- Zhuo Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
| | - Zhinan Fu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
| | - Li Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
| | - Enguang Ma
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832000, China;
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832000, China;
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7
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Continuous and large-scale fabrication of lecithin stabilized nanoparticles with predictable size and stability using flash nano-precipitation. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhu Y, Sheng Y. RETRACTED: Sustained delivery of epalrestat to the retina using PEGylated solid lipid nanoparticles laden contact lens. Int J Pharm 2020; 587:119688. [PMID: 32717281 DOI: 10.1016/j.ijpharm.2020.119688] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/04/2020] [Accepted: 07/21/2020] [Indexed: 12/21/2022]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief. Significant similarities were noticed post-publication between this article and an article submitted to the Journal of Drug Delivery Science and Technology on the same day, by an apparently unrelated research group: Tong Zhang, Tianhui Zhu, Fanyin Wang, Ling Peng and Mingying Lai 60 (2020) 101949 https://doi.org/10.1016/j.jddst.2020.101949 Moreover, the authors did not respond to the journal request to comment on these similarities and to provide the raw data, and the Editor-in-Chief decided to retract the article. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and genuine. As such this article represents a severe abuse of the scientific publishing system.
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Affiliation(s)
- Yanni Zhu
- Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Medical University, No. 167, Fangdong Street, Baqiao District, Xi'an, Shaanxi 710038, China
| | - Yanjuan Sheng
- Department of Ophthalmology, The Second People's Hospital of Jinan, Jinan, Shandong 250001, China.
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Weng J, Tong HHY, Chow SF. In Vitro Release Study of the Polymeric Drug Nanoparticles: Development and Validation of a Novel Method. Pharmaceutics 2020; 12:E732. [PMID: 32759786 PMCID: PMC7465254 DOI: 10.3390/pharmaceutics12080732] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 08/01/2020] [Accepted: 08/02/2020] [Indexed: 11/17/2022] Open
Abstract
The in vitro release study is a critical test to assess the safety, efficacy, and quality of nanoparticle-based drug delivery systems, but there is no compendial or regulatory standard. The variety of testing methods makes direct comparison among different systems difficult. We herein proposed a novel sample and separate (SS) method by combining the United States Pharmacopeia (USP) apparatus II (paddle) with well-validated centrifugal ultrafiltration (CU) technique that efficiently separated the free drug from nanoparticles. Polymeric drug nanoparticles were prepared by using a four-stream multi-inlet vortex mixer with d-α-tocopheryl polyethylene glycol 1000 succinate as a stabilizer. Itraconazole, cholecalciferol, and flurbiprofen were selected to produce three different nanoparticles with particle size <100 nm. By comparing with the dialysis membrane (DM) method and the SS methods using syringe filters, this novel SS + CU technique was considered the most appropriate in terms of the accuracy and repeatability to provide the in vitro release kinetics of nanoparticles. Interestingly, the DM method appeared to misestimate the release kinetics of nanoparticles through separate mechanisms. This work offers a superior analytical technique for studying in vitro drug release from polymeric nanoparticles, which could benefit the future development of in vitro-in vivo correlation of polymeric nanoparticles.
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Affiliation(s)
- Jingwen Weng
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China;
| | - Henry H. Y. Tong
- School of Health Sciences and Sports, Macao Polytechnic Institute, Macao SAR, China;
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China;
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Abstract
Retinal diseases, such as age-related macular degeneration and diabetic retinopathy, are the leading causes of blindness worldwide. The mainstay of treatment for these blinding diseases remains to be surgery, and the available pharmaceutical therapies on the market are limited, partially owing to various biological barriers in hindering the delivery of therapeutics to the retina. The nanoparticulate drug delivery system confers the capability for delivering therapeutics to the specific ocular targets and, hence, potentially revolutionizes the current treatment landscape of retinal diseases. While the research to date indicates the enormous therapeutics potentials of the nanoparticulate delivery systems, the successful translation of these systems from the bench to bedside is challenging and requires a combined understanding of retinal pathology, physiology of the eye, and particle and formulation designs of nanoparticles. To this end, the review begins with an overview of the most prevalent retinal diseases and related pharmacotherapy. Highlights of the current challenges encountered in ocular drug delivery for each administration route are provided, followed by critical appraisal of various nanoparticulate drug delivery systems for the retinal diseases, including their formulation designs, therapeutic merits, limitations, and future direction. It is believed that a greater understanding of the nano-biointeraction in eyes will lead to the development of more sophisticated drug delivery systems for retinal diseases.
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Affiliation(s)
- Qingqing Li
- Faculty of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jingwen Weng
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Si Nga Wong
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Wai Yip Thomas Lee
- Aptorum Group Limited, Unit 232, 12 Science Park West Avenue, Hong Kong Science Park, Shatin New Town, Hong Kong
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
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Converting nanosuspension into inhalable and redispersible nanoparticles by combined in-situ thermal gelation and spray drying. Eur J Pharm Biopharm 2020; 149:238-247. [PMID: 32112895 DOI: 10.1016/j.ejpb.2020.02.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/22/2020] [Accepted: 02/24/2020] [Indexed: 11/22/2022]
Abstract
While nanoparticulate drugs for deep lung delivery hold promise for particular disease treatments, their size-related physical instability and tendency of being exhaled during breathing remain major challenges to their inhaled formulation development. Here we report a viable method for converting drug nanosuspensions into inhalable, stable and redispersible nano-agglomerates through combined in-situ thermal gelation and spray drying. Itraconazole (ITZ) nanosuspensions were prepared by flash nanoprecipitation, and co-spray dried with two different grades of the gel-forming polymer, methylcellulose (MC M20 and MC M450) as protectants. MC M20 was found superior in protecting ITZ nanoparticles against thermal stress (through nanoparticle entrapment within its gel network structure) during spray drying. In terms of redispersibility, an Sf/Si ratio (i.e., ratio of nanoparticle sizes after and before spray drying) of unity (1.02 ± 0.03), reflecting full particle size preservation, was achieved by optimizing the suspending medium content and spray drying parameters. Formulation components, nanosuspension concentration and spray drying parameters all showed a significant impact on the aerosol performance of the resulting agglomerates, but an absence of defined trends or correlations. Overall, the MC-protected nano-agglomerates displayed excellent in-vitro aerosol performance with fine particle fractions higher than 50% and mass median aerodynamic diameters within the 2-3 µm range, which are ideal for deep lung delivery.
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Non-isocyanate polyurethane nanoprecipitation: Toward an optimized preparation of poly(hydroxy)urethane nanoparticles. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124371] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu Y, Yang G, Zou D, Hui Y, Nigam K, Middelberg APJ, Zhao CX. Formulation of Nanoparticles Using Mixing-Induced Nanoprecipitation for Drug Delivery. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04747] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yun Liu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Guangze Yang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Da Zou
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Yue Hui
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Krishna Nigam
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz khas, New Delhi 110016, India
| | - Anton P. J. Middelberg
- Faculty of Engineering, Computer, and Mathematical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Chun-Xia Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia
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Yuan Y, Huang Y. Ionically crosslinked polyelectrolyte nanoparticle formation mechanisms: the significance of mixing. SOFT MATTER 2019; 15:9871-9880. [PMID: 31764931 DOI: 10.1039/c9sm01441a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Mixing oppositely charged polyelectrolytes and multivalent counterion solutions at low concentrations leads to the formation of colloidal ionically crosslinked polyelectrolyte particles. Due to the rapid reaction kinetics, the complexation processes and the final product could vary significantly when changing the mixing efficiency, which was often overlooked in previous studies. To investigate the effect of mixing on the polyelectrolyte-based colloid formation, we use chitosan/tripolyphosphate mixtures as a model system and compare the particle formation under flash nano-complexation (FNC, representing rapid and efficient mixing) and conventional dropwise mixing. It turns out that the non-uniform mixing and rapid complex formation during conventional mixing lead to particle formation at a low tripolyphosphate : chitosan ratio, which could be avoided by FNC. When mixing using FNC, the particle formation started at a critical tripolyphosphate : glucosamine ratio, below which only soluble complexes exist, and such a critical ratio is independent of the chitosan molecular weight and charge density. Homogeneous mixing also leads to the formation of a large amount of small primary particles without further aggregation due to the rapid consumption of free crosslinking counterions. Such a strong dependency of ionically crosslinked polyelectrolyte colloid formation on the mixing efficiency was also demonstrated using other polyelectrolytes and counterions. Thus, the mixing efficiency could have a significant impact on the interpretation of the complexation process and the mechanisms and should be carefully discussed when studying ionically crosslinked polyelectrolyte colloids.
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Affiliation(s)
- Yu Yuan
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
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15
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How can the challenges faced by nanoparticle-based pulmonary drug formulations be overcome. Ther Deliv 2019; 10:87-89. [PMID: 30678543 DOI: 10.4155/tde-2019-0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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