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Lutta A, Knopp MM, Tollemeto M, Pedersen GK, Schmidt ST, Grohganz H, Hagner Nielsen L. The interplay between trehalose and dextran as spray drying precursors for cationic liposomes. Int J Pharm 2024; 652:123798. [PMID: 38190949 DOI: 10.1016/j.ijpharm.2024.123798] [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: 09/29/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
Successful oral delivery of liposomes requires formulations designed to withstand harsh gastrointestinal conditions, e.g., by converting to solid-state followed by loading into gastro-resistant delivery devices. The hypothesis was that the use of dextran-trehalose mixtures for spray drying would improve the rehydration kinetics of dried liposomes. The objectives were to determine the protective capacity of trehalose-dextran dehydration precursors and to increase the concentration of liposomes in the dry formulation volume. The study successfully demonstrated that 8.5% dextran combined with 76.5% trehalose protected CAF®04 liposomes during drying, with the liposome content maintained at 15% of the dry powder. Accordingly, the rehydration kinetics were slightly improved in formulations containing up to 8.5% dextran in the dry powder volume. Additionally, a 2.4-fold increase in lipid concentration (3 mM vs 7.245 mM) was achieved for spray dried CAF®04 liposomes. Ultimately, this study demonstrates the significance of trehalose as a primary carrier during spray drying of CAF®04 liposomes and highlights the advantage of incorporating small amounts of dextran to tune rehydration kinetics of spray-dried liposomes.
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Affiliation(s)
- Anitta Lutta
- Technical University of Denmark, Department of Health Technology, Ørsteds Plads 345C, 2800 Kgs. Lyngby, Denmark; Statens Serum Institut, Department of Infectious Disease and Immunology, Artillerivej 5, 2300 Copenhagen, Denmark.
| | - Matthias M Knopp
- Bioneer:FARMA, Department of Pharmacy, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Matteo Tollemeto
- Technical University of Denmark, Department of Health Technology, Ørsteds Plads 345C, 2800 Kgs. Lyngby, Denmark
| | - Gabriel K Pedersen
- Statens Serum Institut, Department of Infectious Disease and Immunology, Artillerivej 5, 2300 Copenhagen, Denmark
| | - Signe T Schmidt
- Statens Serum Institut, Department of Infectious Disease and Immunology, Artillerivej 5, 2300 Copenhagen, Denmark
| | - Holger Grohganz
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Line Hagner Nielsen
- Technical University of Denmark, Department of Health Technology, Ørsteds Plads 345C, 2800 Kgs. Lyngby, Denmark
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2
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Zhdanov DD, Ivin YY, Shishparenok AN, Kraevskiy SV, Kanashenko SL, Agafonova LE, Shumyantseva VV, Gnedenko OV, Pinyaeva AN, Kovpak AA, Ishmukhametov AA, Archakov AI. Perspectives for the creation of a new type of vaccine preparations based on pseudovirus particles using polio vaccine as an example. BIOMEDITSINSKAIA KHIMIIA 2023; 69:253-280. [PMID: 37937429 DOI: 10.18097/pbmc20236905253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Traditional antiviral vaccines are currently created by inactivating the virus chemically, most often using formaldehyde or β-propiolactone. These approaches are not optimal since they negatively affect the safety of the antigenic determinants of the inactivated particles and require additional purification stages. The most promising platforms for creating vaccines are based on pseudoviruses, i.e., viruses that have completely preserved the outer shell (capsid), while losing the ability to reproduce owing to the destruction of the genome. The irradiation of viruses with electron beam is the optimal way to create pseudoviral particles. In this review, with the example of the poliovirus, the main algorithms that can be applied to characterize pseudoviral particles functionally and structurally in the process of creating a vaccine preparation are presented. These algorithms are, namely, the analysis of the degree of genome destruction and coimmunogenicity. The structure of the poliovirus and methods of its inactivation are considered. Methods for assessing residual infectivity and immunogenicity are proposed for the functional characterization of pseudoviruses. Genome integrity analysis approaches, atomic force and electron microscopy, surface plasmon resonance, and bioelectrochemical methods are crucial to structural characterization of the pseudovirus particles.
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Affiliation(s)
- D D Zhdanov
- Institute of Biomedical Chemistry, Moscow, Russia
| | - Yu Yu Ivin
- Institute of Biomedical Chemistry, Moscow, Russia; Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, Moscow, Russia
| | | | | | | | | | - V V Shumyantseva
- Institute of Biomedical Chemistry, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
| | - O V Gnedenko
- Institute of Biomedical Chemistry, Moscow, Russia
| | - A N Pinyaeva
- Institute of Biomedical Chemistry, Moscow, Russia; Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, Moscow, Russia
| | - A A Kovpak
- Institute of Biomedical Chemistry, Moscow, Russia
| | - A A Ishmukhametov
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, Moscow, Russia
| | - A I Archakov
- Institute of Biomedical Chemistry, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
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Dutill TS, Archer MC, McCollum J, Press C, McNeill L, Hawkins L, Phan T, Laursen E, Cabullos R, Bouchard L, Castro RJ, Lin MW, Roco J, Blois C, Adeagbo B, Guderian JA, Gerhardt A, Beckmann AM, Trappler EH, Kramer RM, Fox CB. Lyophilization Process Engineering and Thermostability of ID93 + GLA-SE, a Single-Vial Adjuvanted Subunit Tuberculosis Vaccine Candidate for Use in Clinical Studies. FRONTIERS IN DRUG DELIVERY 2022; 2:1043756. [PMID: 37771324 PMCID: PMC10538572 DOI: 10.3389/fddev.2022.1043756] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Promising clinical efficacy results have generated considerable enthusiasm for the potential impact of adjuvant-containing subunit tuberculosis vaccines. The development of a thermostable tuberculosis vaccine formulation could have significant benefits on both the cost and feasibility of global vaccine distribution. The tuberculosis vaccine candidate ID93 + GLA-SE has reached Phase 2 clinical testing, demonstrating safety and immunogenicity as a two-vial point-of-care mixture. Earlier publications have detailed efforts to develop a lead candidate single-vial lyophilized thermostable ID93 + GLA-SE vaccine formulation. The present report describes the lyophilization process development and scale-up of the lead candidate thermostable ID93 + GLA-SE composition. The manufacture of three full-scale engineering batches was followed by one batch made and released under current Good Manufacturing Practices (cGMP). Up to 4.5 years of stability data were collected. The cGMP lyophilized ID93 + GLA-SE passed all manufacturing release test criteria and maintained stability for at least 3 months when stored at 37°C and up to 24 months when stored at 5°C. This work represents the first advancement of a thermostable adjuvant-containing subunit tuberculosis vaccine to clinical testing readiness.
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Affiliation(s)
| | - Michelle C. Archer
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Joseph McCollum
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Chris Press
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Lisa McNeill
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Linda Hawkins
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Tony Phan
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Erik Laursen
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Richard Cabullos
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Lisa Bouchard
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Regie J. Castro
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Mong-Wu Lin
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Jeralyn Roco
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Cecile Blois
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Babatunde Adeagbo
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
- Department of Pharmaceutical Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Jeffrey A. Guderian
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Alana Gerhardt
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Anna Marie Beckmann
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | | | - Ryan M. Kramer
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
| | - Christopher B. Fox
- Access to Advanced Health Institute (AAHI; formerly Infectious Disease Research Institute), Seattle, WA, USA
- Department of Global Health, University of Washington, Seattle, WA, USA
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Zhao K, Xie Y, Lin X, Xu W. The Mucoadhesive Nanoparticle-Based Delivery System in the Development of Mucosal Vaccines. Int J Nanomedicine 2022; 17:4579-4598. [PMID: 36199476 PMCID: PMC9527817 DOI: 10.2147/ijn.s359118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 09/14/2022] [Indexed: 11/25/2022] Open
Abstract
Mucosal tissue constitutes the largest interface between the body and the external environment, regulating the entry of pathogens, particles, and molecules. Mucosal immunization is the most effective way to trigger a protective mucosal immune response. However, the majority of the currently licensed vaccines are recommended to be administered by intramuscular injection, which has obvious shortcomings, such as high production costs, low patient compliance, and lack of mucosal immune response. Strategies for eliciting mucosal and systemic immune responses are being developed, including appropriate vaccine adjuvant, delivery system, and bacterial or viral vectors. Biodegradable mucoadhesive nanoparticles (NPs) are the most promising candidate for vaccine delivery systems due to their inherent immune adjuvant property and the ability to protect the antigen from degradation, sustain the release of loaded antigen, and increase the residence time of antigen at the administration site. The current review outlined the complex structure of mucosa, the mechanism of interaction between NPs and mucosa, factors affecting the mucoadhesion of NPs, and the application of the delivery system based on mucoadhesive NPs in the field of vaccines. Moreover, this review demonstrated that the biodegradable and mucoadhesive NP-based delivery system has the potential for mucosal administration of vaccines.
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Affiliation(s)
- Kai Zhao
- Taizhou Central Hospital (Taizhou University Hospital), Taizhou University, Taizhou, Zhejiang, 318000, People’s Republic of China
- Institute of Nanobiomaterials and Immunology, School of Life Science, Taizhou University, Taizhou, Zhejiang, 318000, People’s Republic of China
- Correspondence: Kai Zhao, Tel +86 576 88660338, Email
| | - Yinzhuo Xie
- Institute of Nanobiomaterials and Immunology, School of Life Science, Taizhou University, Taizhou, Zhejiang, 318000, People’s Republic of China
| | - Xuezheng Lin
- Taizhou Central Hospital (Taizhou University Hospital), Taizhou University, Taizhou, Zhejiang, 318000, People’s Republic of China
- Xuezheng Lin, Taizhou Central Hospital (Taizhou University Hospital), Taizhou University, Taizhou, Zhejiang, 318000, People’s Republic of China, Email
| | - Wei Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, People’s Republic of China
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5
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Spray-dried Pneumococcal Membrane Vesicles are Promising Candidates for Pulmonary Immunization. Int J Pharm 2022; 621:121794. [PMID: 35525468 DOI: 10.1016/j.ijpharm.2022.121794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 11/23/2022]
Abstract
Pneumococcal infections represent a global health threat, which requires novel vaccine developments. Extracellular vesicles are secreted from most cells, including prokaryotes, and harbor virulence factors and antigens. Hence, bacterial membrane vesicles (MVs) may induce a protective immune response. For the first time, we formulate spray-dried gram-positive pneumococcal MVs-loaded vaccine microparticles using lactose/leucine as inert carriers to enhance their stability and delivery for pulmonary immunization. The optimized vaccine microparticles showed a mean particle size of 1-2µm, corrugated surface, and nanocrystalline nature. Their aerodynamic diameter of 2.34µm, average percentage emitted dose of 88.8%, and fine powder fraction 79.7%, demonstrated optimal flow properties for deep alveolar delivery using a next-generation impactor. Furthermore, confocal microscopy confirmed the successful encapsulation of pneumococcal MVs within the prepared microparticles. Human macrophage-like THP-1 cells displayed excellent viability, negligible cytotoxicity, and a rapid uptake around 60% of fluorescently labeled MVs after incubation with vaccine microparticles. Moreover, vaccine microparticles increased the release of pro-inflammatory cytokines tumor necrosis factor and interleukin-6 from primary human peripheral blood mononuclear cells. Vaccine microparticles exhibited excellent properties as promising vaccine candidates for pulmonary immunization and are optimal for further animal testing, scale-up and clinical translation.
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6
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Guo Y, Bera H, Shi C, Zhang L, Cun D, Yang M. Pharmaceutical strategies to extend pulmonary exposure of inhaled medicines. Acta Pharm Sin B 2021; 11:2565-2584. [PMID: 34522598 PMCID: PMC8424368 DOI: 10.1016/j.apsb.2021.05.015] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/19/2021] [Accepted: 04/26/2021] [Indexed: 12/13/2022] Open
Abstract
Pulmonary administration route has been extensively exploited for the treatment of local lung diseases such as asthma, chronic obstructive pulmonary diseases and respiratory infections, and systemic diseases such as diabetes. Most inhaled medicines could be cleared rapidly from the lungs and their therapeutic effects are transit. The inhaled medicines with extended pulmonary exposure may not only improve the patient compliance by reducing the frequency of drug administration, but also enhance the clinical benefits to the patients with improved therapeutic outcomes. This article systematically reviews the physical and chemical strategies to extend the pulmonary exposure of the inhaled medicines. It starts with an introduction of various physiological and pathophysiological barriers for designing inhaled medicines with extended lung exposure, which is followed by recent advances in various strategies to overcome these barriers. Finally, the applications of the inhaled medicines with extended lung exposure for the treatment of various diseases and the safety concerns associated to various strategies to extend the pulmonary exposure of the inhaled medicines are summarized.
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Key Words
- ALIS, amikacin liposomal inhalation suspension
- API, active pharmaceutical ingredient
- BALF, bronchoalveolar lavage fluid
- COPD, chronic obstructive pulmonary diseases
- CS, chitosan
- DPIs, dry powder inhalers
- DPPC, dipalmitoylphosphatidylcholine
- DSPC, 1,2-distearoyl-sn-glycero-3-phosphocholine
- Da, aerodynamic diameters
- ELF, epithelial lining fluid
- FDA, US food and drug administration
- FDKP, fumaryl diketopiperazine
- HA, hyaluronic acid
- IL-4, interleukin-4
- IL-5, interleukin-5
- Inhaled sustained release formulations
- LABA, long-acting β2-adrenoceptor agonist
- LPPs, large porous particles
- Local lung diseases
- MCE, mucociliary escalator
- MDIs, metered dose inhalers
- MP, mucoadhesive particles
- MPP, mucus-penetrating particles
- MW, molecular weight
- Mn, number-average molecular weight
- NLCs, nanostructured lipid carriers
- PCL, poly-ε-caprolactone
- PDD, pulmonary drug delivery
- PEG, polyethylene glycol
- PK, pharmacokinetics
- PLA, polylactic acid
- PLGA, poly(lactic-co-glycolic acid)
- PVA, polyvinyl alcohol
- Pharmaceutical strategies
- Pulmonary clearance pathways
- Pulmonary drug delivery
- Pulmonary exposure
- Pulmonary safety
- SLNs, solid lipid nanoparticles
- Systemic diseases
- Tmax, time of maximum concentration
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Affiliation(s)
- Yi Guo
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hriday Bera
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Changzhi Shi
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Li Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Dongmei Cun
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Corresponding author. Tel./fax: +86 24 23986165.
| | - Mingshi Yang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
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Sepúlveda CT, Alemán A, Zapata JE, Montero MP, Gómez-Guillén MC. Characterization and storage stability of spray dried soy-rapeseed lecithin/trehalose liposomes loaded with a tilapia viscera hydrolysate. INNOV FOOD SCI EMERG 2021. [DOI: 10.1016/j.ifset.2021.102708] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Cun D, Zhang C, Bera H, Yang M. Particle engineering principles and technologies for pharmaceutical biologics. Adv Drug Deliv Rev 2021; 174:140-167. [PMID: 33845039 DOI: 10.1016/j.addr.2021.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/21/2021] [Accepted: 04/06/2021] [Indexed: 12/12/2022]
Abstract
The global market of pharmaceutical biologics has expanded significantly during the last few decades. Currently, pharmaceutical biologic products constitute an indispensable part of the modern medicines. Most pharmaceutical biologic products are injections either in the forms of solutions or lyophilized powders because of their low oral bioavailability. There are certain pharmaceutical biologic entities formulated into particulate delivery systems for the administration via non-invasive routes or to achieve prolonged pharmaceutical actions to reduce the frequency of injections. It has been well documented that the design of nano- and microparticles via various particle engineering technologies could render pharmaceutical biologics with certain benefits including improved stability, enhanced intracellular uptake, prolonged pharmacological effect, enhanced bioavailability, reduced side effects, and improved patient compliance. Herein, we review the principles of the particle engineering technologies based on bottom-up approach and present the important formulation and process parameters that influence the critical quality attributes with some mathematical models. Subsequently, various nano- and microparticle engineering technologies used to formulate or process pharmaceutical biologic entities are reviewed. Lastly, an array of commercialized products of pharmaceutical biologics accomplished based on various particle engineering technologies are presented and the challenges in the development of particulate delivery systems for pharmaceutical biologics are discussed.
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Affiliation(s)
- Dongmei Cun
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road No. 103, 110016 Shenyang, China
| | - Chengqian Zhang
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Hriday Bera
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road No. 103, 110016 Shenyang, China
| | - Mingshi Yang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road No. 103, 110016 Shenyang, China; Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
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9
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Gomez M, Archer M, Barona D, Wang H, Ordoubadi M, Bin Karim S, Carrigy NB, Wang Z, McCollum J, Press C, Gerhardt A, Fox CB, Kramer RM, Vehring R. Microparticle encapsulation of a tuberculosis subunit vaccine candidate containing a nanoemulsion adjuvant via spray drying. Eur J Pharm Biopharm 2021; 163:23-37. [PMID: 33753213 PMCID: PMC8096719 DOI: 10.1016/j.ejpb.2021.03.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 03/10/2021] [Accepted: 03/13/2021] [Indexed: 12/20/2022]
Abstract
Spray drying is a technique that can be used to stabilize biopharmaceuticals, such as vaccines, within dry particles. Compared to liquid pharmaceutical products, dry powder has the potential to reduce costs associated with refrigerated storage and transportation. In this study, spray drying was investigated for processing an adjuvanted tuberculosis subunit vaccine, formulated as an oil-in-water nanoemulsion, into a dry powder composed of microparticles. Applying in-silico approaches to the development of formulation and processing conditions, successful encapsulation of the adjuvanted vaccine within amorphous microparticles was achieved in only one iteration, with high retention (>90%) of both the antigen and adjuvant system. Moisture-controlled stability studies on the powder were conducted over 26 months at temperatures up to 40 °C. Results showed that the powder was physically stable after 26 months of storage for all tested temperatures. Adjuvant system integrity was maintained at temperatures up to 25 °C after 26 months and after one month of storage at 40 °C. The spray-dried product demonstrated improved antigen thermostability when stored above refrigerated temperatures as compared to the liquid product. These results demonstrate the feasibility of spray drying as a method of encapsulating and stabilizing an adjuvanted vaccine.
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Affiliation(s)
- Mellissa Gomez
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | | | - David Barona
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Hui Wang
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Mani Ordoubadi
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Shabab Bin Karim
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Nicholas B Carrigy
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Zheng Wang
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | | | - Chris Press
- Infectious Disease Research Institute, Seattle, WA, USA
| | | | - Christopher B Fox
- Infectious Disease Research Institute, Seattle, WA, USA; Department of Global Health, University of Washington, Seattle, WA, USA
| | - Ryan M Kramer
- Infectious Disease Research Institute, Seattle, WA, USA
| | - Reinhard Vehring
- Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada.
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10
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Klijn ME, Hubbuch J. Application of ultraviolet, visible, and infrared light imaging in protein-based biopharmaceutical formulation characterization and development studies. Eur J Pharm Biopharm 2021; 165:319-336. [PMID: 34052429 DOI: 10.1016/j.ejpb.2021.05.013] [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: 11/23/2020] [Revised: 03/29/2021] [Accepted: 05/12/2021] [Indexed: 01/10/2023]
Abstract
Imaging is increasingly more utilized as analytical technology in biopharmaceutical formulation research, with applications ranging from subvisible particle characterization to thermal stability screening and residual moisture analysis. This review offers a comprehensive overview of analytical imaging for scientists active in biopharmaceutical formulation research and development, where it presents the unique information provided by the ultraviolet (UV), visible (Vis), and infrared (IR) sections in the electromagnetic spectrum. The main body of this review consists of an outline of UV, Vis, and IR imaging techniques for several (bio)physical properties that are commonly determined during protein-based biopharmaceutical formulation characterization and development studies. The review concludes with a future perspective of applied imaging within the field of biopharmaceutical formulation research.
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Affiliation(s)
- Marieke E Klijn
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, the Netherlands.
| | - Jürgen Hubbuch
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
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Qi Y, Fox CB. Development of thermostable vaccine adjuvants. Expert Rev Vaccines 2021; 20:497-517. [PMID: 33724133 PMCID: PMC8292183 DOI: 10.1080/14760584.2021.1902314] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/09/2021] [Indexed: 01/15/2023]
Abstract
INTRODUCTION The importance of vaccine thermostability has been discussed in the literature. Nevertheless, the challenge of developing thermostable vaccine adjuvants has sometimes not received appropriate emphasis. Adjuvants comprise an expansive range of particulate and molecular compositions, requiring innovative thermostable formulation and process development approaches. AREAS COVERED Reports on efforts to develop thermostable adjuvant-containing vaccines have increased in recent years, and substantial progress has been made in enhancing the stability of the major classes of adjuvants. This narrative review summarizes the current status of thermostable vaccine adjuvant development and looks forward to the next potential developments in the field. EXPERT OPINION As adjuvant-containing vaccines become more widely used, the unique challenges associated with developing thermostable adjuvant formulations merit increased attention. In particular, more focused efforts are needed to translate promising proof-of-concept technologies and formulations into clinical products.
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Affiliation(s)
- Yizhi Qi
- Infectious Disease Research Institute (IDRI), 1616 Eastlake
Ave E, Seattle, WA, USA
| | - Christopher B. Fox
- Infectious Disease Research Institute (IDRI), 1616 Eastlake
Ave E, Seattle, WA, USA
- Department of Global Health, University of Washington,
Seattle, WA, USA
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12
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Xu Y, Thakur A, Zhang Y, Foged C. Inhaled RNA Therapeutics for Obstructive Airway Diseases: Recent Advances and Future Prospects. Pharmaceutics 2021; 13:pharmaceutics13020177. [PMID: 33525500 PMCID: PMC7912103 DOI: 10.3390/pharmaceutics13020177] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/20/2021] [Accepted: 01/23/2021] [Indexed: 02/06/2023] Open
Abstract
Obstructive airway diseases, e.g., chronic obstructive pulmonary disease (COPD) and asthma, represent leading causes of morbidity and mortality worldwide. However, the efficacy of currently available inhaled therapeutics is not sufficient for arresting disease progression and decreasing mortality, hence providing an urgent need for development of novel therapeutics. Local delivery to the airways via inhalation is promising for novel drugs, because it allows for delivery directly to the target site of action and minimizes systemic drug exposure. In addition, novel drug modalities like RNA therapeutics provide entirely new opportunities for highly specific treatment of airway diseases. Here, we review state of the art of conventional inhaled drugs used for the treatment of COPD and asthma with focus on quality attributes of inhaled medicines, and we outline the therapeutic potential and safety of novel drugs. Subsequently, we present recent advances in manufacturing of thermostable solid dosage forms for pulmonary administration, important quality attributes of inhalable dry powder formulations, and obstacles for the translation of inhalable solid dosage forms to the clinic. Delivery challenges for inhaled RNA therapeutics and delivery technologies used to overcome them are also discussed. Finally, we present future prospects of novel inhaled RNA-based therapeutics for treatment of obstructive airways diseases, and highlight major knowledge gaps, which require further investigation to advance RNA-based medicine towards the bedside.
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Affiliation(s)
- You Xu
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark; (Y.X.); (A.T.); (Y.Z.)
| | - Aneesh Thakur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark; (Y.X.); (A.T.); (Y.Z.)
| | - Yibang Zhang
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark; (Y.X.); (A.T.); (Y.Z.)
- Department of Pharmaceutics, School of Pharmacy, Jiangsu University, Zhenjiang 212013, China
| | - Camilla Foged
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark; (Y.X.); (A.T.); (Y.Z.)
- Correspondence: ; Tel.: +45-3533-6402
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13
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Abstract
Mucosal surfaces represent important routes of entry into the human body for the majority of pathogens, and they constitute unique sites for targeted vaccine delivery. Nanoparticle-based drug delivery systems are emerging technologies for delivering and improving the efficacy of mucosal vaccines. Recent studies have provided new insights into formulation and delivery aspects of importance for the design of safe and efficacious mucosal subunit vaccines based on nanoparticles. These include novel nanomaterials, their physicochemical properties and formulation approaches, nanoparticle interaction with immune cells in the mucosa, and mucosal immunization and delivery strategies. Here, we present recent progress in the application of nanoparticle-based approaches for mucosal vaccine delivery and discuss future research challenges and opportunities in the field.
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Overcoming Poor Tabletability of Bulky Absorption Enhancers by Spray Drying Technology. J Pharm Sci 2019; 108:2128-2135. [PMID: 30721708 DOI: 10.1016/j.xphs.2019.01.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/18/2019] [Accepted: 01/28/2019] [Indexed: 11/21/2022]
Abstract
Absorption enhancers are often a major component of solid oral peptide formulations as compared to the active pharmaceutical ingredient and excipients. This commonly results in poor tabletability that is hard to mitigate in direct compaction by addition of small amounts of excipients. To improve the tabletability of bulky absorption enhancers, the model absorption enhancers, sodium cholate and deoxycholic acid, were co-spray-dried with hydroxypropyl methylcellulose E5, where the percentage of absorption enhancers was not lower than 90% (w/w). The physicochemical properties of the resulting powders were assessed by laser diffraction, scanning electron microscopy, X-ray powder diffraction, thermogravimetric analysis, and differential scanning calorimetry. The powders were compressed into tablets, and the tabletability was evaluated. Co-spray drying with 10% of hydroxypropyl methylcellulose significantly improved the tabletability of the both absorption enhancers. Moreover, it was demonstrated that small particle size and amorphous state rather than high moisture content contributed to the improved tabletability of the spray-dried powders. The study suggests that spray drying technology can be promising to overcome the poor tabletability of oral peptide formulation consisting of large amounts of absorption enhancers.
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Evaluation of the effects of spray drying parameters for producing cubosome powder precursors. Eur J Pharm Biopharm 2019; 135:44-48. [DOI: 10.1016/j.ejpb.2018.12.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/10/2018] [Accepted: 12/15/2018] [Indexed: 11/20/2022]
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Abstract
INTRODUCTION Nanoparticles are under discussion in drug delivery for more than 20 years now, but examples for nanoparticulate formulations in the treatment of respiratory diseases are rare and mostly limited to the administration of sub-micron drug particles (ultrafine particles). However, nanoparticles may also carry specific benefits for respiratory treatment. Are nanoparticles the next-generation drug carrier system to facilitate systemic delivery, sustained release and cancer treatment in the lungs? AREAS COVERED This review will look into the promises and opportunities of the use of nanoparticles in the treatment of respiratory diseases. Important aspects to discuss are the fate of nanoparticles in the lung and mechanisms for reproducible delivery of nanoparticulate formulations to the lungs. Examples are given where nanoparticles may be advantageous over for traditional formulations and further aspects to explore are mentioned. EXPERT OPINION The benefit of nanoparticulate systems for respiratory delivery adds to the portfolio of possible formulation strategies, depends on the intended functionality and needs more exploration. Advantages of such systems are only seen in special cases.
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Affiliation(s)
- Regina Scherließ
- a Department of Pharmaceutics and Biopharmaceutics , Kiel University , Kiel , Germany
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17
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Spray dried cubosomes with ovalbumin and Quil-A as a nanoparticulate dry powder vaccine formulation. Int J Pharm 2018; 550:35-44. [DOI: 10.1016/j.ijpharm.2018.08.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/17/2018] [Accepted: 08/18/2018] [Indexed: 01/30/2023]
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18
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Immunological and physical evaluation of the multistage tuberculosis subunit vaccine candidate H56/CAF01 formulated as a spray-dried powder. Vaccine 2018; 36:3331-3339. [PMID: 29699790 DOI: 10.1016/j.vaccine.2018.04.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/16/2018] [Accepted: 04/19/2018] [Indexed: 01/11/2023]
Abstract
Liquid vaccine dosage forms have limited stability and require refrigeration during their manufacture, distribution and storage. In contrast, solid vaccine dosage forms, produced by for example spray drying, offer improved storage stability and reduced dependence on cold-chain facilities. This is advantageous for mass immunization campaigns for global public health threats, e.g., tuberculosis (TB), and offers cheaper vaccine distribution. The multistage subunit vaccine antigen H56, which is a fusion protein of the Mycobacterium tuberculosis (Mtb) antigens Ag85B, ESAT-6, and Rv2660, has been shown to confer protective efficacy against active TB before and after Mtb exposure in preclinical models, and it is currently undergoing clinical phase 2a testing. In several studies, including a recent study comparing multiple clinically relevant vaccine adjuvants, the T helper type 1 (Th1)/Th17-inducing adjuvant CAF01 was the most efficacious adjuvant for H56 to stimulate protective immunity against Mtb. With the long-term goal of designing a thermostable and self-administrable dry powder vaccine based on H56 and CAF01 for inhalation, we compared H56 spray-dried with CAF01 with the non-spray-dried H56/CAF01 vaccine with respect to their ability to induce systemic Th1, Th17 and humoral responses after subcutaneous immunization. Here we show that spray drying of the H56/CAF01 vaccine results in preserved antigenic epitope recognition and adjuvant activity of CAF01, and the spray-dried, reconstituted vaccine induces antigen-specific Th1, Th17 and humoral immune responses, which are comparable to those stimulated by the non-spray-dried H56/CAF01 vaccine. In addition, the spray-dried and reconstituted H56/CAF01 vaccine promotes similar polyfunctional CD4+ T-cell responses as the non-spray-dried vaccine. Thus, our study provides proof-of-concept that spray drying of the subunit vaccine H56/CAF01 preserves vaccine-induced humoral and cell-mediated immune responses. These results support our ongoing efforts to develop a thermostable, dry powder-based TB vaccine.
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De Serrano LO, Burkhart DJ. Liposomal vaccine formulations as prophylactic agents: design considerations for modern vaccines. J Nanobiotechnology 2017; 15:83. [PMID: 29149896 PMCID: PMC5693489 DOI: 10.1186/s12951-017-0319-9] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/09/2017] [Indexed: 01/04/2023] Open
Abstract
Vaccinology is one of the most important cornerstones in modern medicine, providing better quality of life. The human immune system is composed of innate and adaptive immune processes that interplay when infection occurs. Innate immunity relies on pathogen-associated molecular patterns which are recognized by pathogen recognition receptors localized in antigen presenting cells. After antigen processing and presentation, CD4+ T cell polarization occurs, further leading to B cell and CD8+ activation and humoral and cell-mediated adaptive immune responses. Liposomes are being employed as vaccine technologies and their design is of importance to ensure proper immune responses. Physicochemical parameters like liposome size, charge, lamellarity and bilayer fluidity must be completely understood to ensure optimal vaccine stability and efficacy. Liposomal vaccines can be developed to target specific immune cell types for the induction of certain immune responses. In this review, we will present promising liposomal vaccine approaches for the treatment of important viral, bacterial, fungal and parasitic infections (including tuberculosis, TB). Cationic liposomes are the most studied liposome types due to their enhanced interaction with the negatively charged immune cells. Thus, a special section on the cationic lipid dimethyldioctadecylammonium and TB is also presented.
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Affiliation(s)
- Luis O. De Serrano
- Department of Biomedical & Pharmaceutical Sciences and Center for Translational Medicine, University of Montana, 32 Campus Drive, Missoula, MT 59812 USA
| | - David J. Burkhart
- Department of Biomedical & Pharmaceutical Sciences and Center for Translational Medicine, University of Montana, 32 Campus Drive, Missoula, MT 59812 USA
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Effect of ethanol as a co-solvent on the aerosol performance and stability of spray-dried lysozyme. Int J Pharm 2016; 513:175-182. [DOI: 10.1016/j.ijpharm.2016.09.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/03/2016] [Accepted: 09/07/2016] [Indexed: 01/03/2023]
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Carneiro C, Correia A, Collins T, Vilanova M, Pais C, Gomes AC, Real Oliveira MEC, Sampaio P. DODAB:monoolein liposomes containing Candida albicans cell wall surface proteins: A novel adjuvant and delivery system. Eur J Pharm Biopharm 2015; 89:190-200. [DOI: 10.1016/j.ejpb.2014.11.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 11/28/2014] [Accepted: 11/29/2014] [Indexed: 11/26/2022]
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Pajander JP, Matero S, Sloth J, Wan F, Rantanen J, Yang M. Raman Mapping of Mannitol/Lysozyme Particles Produced Via Spray Drying and Single Droplet Drying. Pharm Res 2014; 32:1993-2002. [DOI: 10.1007/s11095-014-1592-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 12/02/2014] [Indexed: 11/24/2022]
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Schwendener RA. Liposomes as vaccine delivery systems: a review of the recent advances. THERAPEUTIC ADVANCES IN VACCINES 2014; 2:159-82. [PMID: 25364509 DOI: 10.1177/2051013614541440] [Citation(s) in RCA: 319] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Liposomes and liposome-derived nanovesicles such as archaeosomes and virosomes have become important carrier systems in vaccine development and the interest for liposome-based vaccines has markedly increased. A key advantage of liposomes, archaeosomes and virosomes in general, and liposome-based vaccine delivery systems in particular, is their versatility and plasticity. Liposome composition and preparation can be chosen to achieve desired features such as selection of lipid, charge, size, size distribution, entrapment and location of antigens or adjuvants. Depending on the chemical properties, water-soluble antigens (proteins, peptides, nucleic acids, carbohydrates, haptens) are entrapped within the aqueous inner space of liposomes, whereas lipophilic compounds (lipopeptides, antigens, adjuvants, linker molecules) are intercalated into the lipid bilayer and antigens or adjuvants can be attached to the liposome surface either by adsorption or stable chemical linking. Coformulations containing different types of antigens or adjuvants can be combined with the parameters mentioned to tailor liposomal vaccines for individual applications. Special emphasis is given in this review to cationic adjuvant liposome vaccine formulations. Examples of vaccines made with CAF01, an adjuvant composed of the synthetic immune-stimulating mycobacterial cordfactor glycolipid trehalose dibehenate as immunomodulator and the cationic membrane forming molecule dimethyl dioctadecylammonium are presented. Other vaccines such as cationic liposome-DNA complexes (CLDCs) and other adjuvants like muramyl dipeptide, monophosphoryl lipid A and listeriolysin O are mentioned as well. The field of liposomes and liposome-based vaccines is vast. Therefore, this review concentrates on recent and relevant studies emphasizing current reports dealing with the most studied antigens and adjuvants, and pertinent examples of vaccines. Studies on liposome-based veterinary vaccines and experimental therapeutic cancer vaccines are also summarized.
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Affiliation(s)
- Reto A Schwendener
- Institute of Molecular Cancer Research, Laboratory of Liposome Research, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
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Overcoming Glucocorticoid Resistances and Improving Antitumor Therapies: Lipid and Polymers Carriers. Pharm Res 2014; 32:968-85. [DOI: 10.1007/s11095-014-1510-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 09/03/2014] [Indexed: 11/26/2022]
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Montagnani C, Chiappini E, Galli L, de Martino M. Vaccine against tuberculosis: what's new? BMC Infect Dis 2014; 14 Suppl 1:S2. [PMID: 24564340 PMCID: PMC4015960 DOI: 10.1186/1471-2334-14-s1-s2] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background one of the World Health Organization Millennium Development Goal is to reduce tuberculosis incidence by 2015. However, more of 8.5 million tuberculosis cases have been reported in 2011, with an increase of multidrug-resistant strains. Therefore, the World Health Organization target cannot be reach without the help of a vaccine able to limit the spread of tuberculosis. Nowadays, bacille Calmette-Guérin is the only vaccine available against tuberculosis. It prevents against meningeal and disseminated tuberculosis in children, but its effectiveness against pulmonary form in adolescents and adults is argued. Method a systematic review was performed by searches of Pubmed, references of the relevant articles and Aeras and ClinicalTrial.gov websites. Results 100 articles were included in this review. Three viral vectored booster vaccines, five protein adjuvant booster vaccines, two priming vaccines and two therapeutic vaccines have been analyzed. Conclusions Several vaccines are in the pipeline, but further studies on basic research, clinical trial and mass vaccination campaigns are needed to achieve the TB eradication target by 2050.
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Ingvarsson PT, Yang M, Mulvad H, Nielsen HM, Rantanen J, Foged C. Engineering of an inhalable DDA/TDB liposomal adjuvant: a quality-by-design approach towards optimization of the spray drying process. Pharm Res 2013; 30:2772-84. [PMID: 23794038 DOI: 10.1007/s11095-013-1096-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 05/28/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE The purpose of this study was to identify and optimize spray drying parameters of importance for the design of an inhalable powder formulation of a cationic liposomal adjuvant composed of dimethyldioctadecylammonium (DDA) bromide and trehalose-6,6'-dibehenate (TDB). METHODS A quality by design (QbD) approach was applied to identify and link critical process parameters (CPPs) of the spray drying process to critical quality attributes (CQAs) using risk assessment and design of experiments (DoE), followed by identification of an optimal operating space (OOS). A central composite face-centered design was carried out followed by multiple linear regression analysis. RESULTS Four CQAs were identified; the mass median aerodynamic diameter (MMAD), the liposome stability (size) during processing, the moisture content and the yield. Five CPPs (drying airflow, feed flow rate, feedstock concentration, atomizing airflow and outlet temperature) were identified and tested in a systematic way. The MMAD and the yield were successfully modeled. For the liposome size stability, the ratio between the size after and before spray drying was modeled successfully. The model for the residual moisture content was poor, although, the moisture content was below 3% in the entire design space. Finally, the OOS was drafted from the constructed models for the spray drying of trehalose stabilized DDA/TDB liposomes. CONCLUSIONS The QbD approach for the spray drying process should include a careful consideration of the quality target product profile. This approach implementing risk assessment and DoE was successfully applied to optimize the spray drying of an inhalable DDA/TDB liposomal adjuvant designed for pulmonary vaccination.
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Affiliation(s)
- Pall Thor Ingvarsson
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen O, Denmark
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Wan F, Maltesen M, Bjerregaard S, Foged C, Rantanen J, Yang M. Particle engineering technologies for improving the delivery of peptide and protein drugs. J Drug Deliv Sci Technol 2013. [DOI: 10.1016/s1773-2247(13)50052-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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