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Manser M, Morgan BA, Feng X, Rhem RG, Dolovich MB, Xing Z, Cranston ED, Thompson MR. Dextran Mass Ratio Controls Particle Drying Dynamics in a Thermally Stable Dry Powder Vaccine for Pulmonary Delivery. Pharm Res 2022; 39:2315-2328. [PMID: 35854077 PMCID: PMC9296218 DOI: 10.1007/s11095-022-03341-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/11/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE Thermally stable, spray dried vaccines targeting respiratory diseases are promising candidates for pulmonary delivery, requiring careful excipient formulation to effectively encapsulate and protect labile biologics. This study investigates the impact of dextran mass ratio and molecular weight on activity retention, thermal stability and aerosol behaviour of a labile adenoviral vector (AdHu5) encapsulated within a spray dried mannitol-dextran blend. METHODS Comparing formulations using 40 kDa or 500 kDa dextran at mass ratios of 1:3 and 3:1 mannitol to dextran, in vitro quantification of activity losses and powder flowability was used to assess suitability for inhalation. RESULTS Incorporating mannitol in a 1:3 ratio with 500 kDa dextran reduced viral titre processing losses below 0.5 log and displayed strong thermal stability under accelerated aging conditions. Moisture absorption and agglomeration was higher in dextran-rich formulations, but under low humidity the 1:3 ratio with 500 kDa dextran powder had the lowest mass median aerodynamic diameter (4.4 µm) and 84% emitted dose from an intratracheal dosator, indicating strong aerosol performance. CONCLUSIONS Overall, dextran-rich formulations increased viscosity during drying which slowed self-diffusion and favorably hindered viral partitioning at the particle surface. Reducing mannitol content also minimized AdHu5 exclusion from crystalline regions that can force the vector to air-solid interfaces where deactivation occurs. Although increased dextran molecular weight improved activity retention at the 1:3 ratio, it was less influential than the ratio parameter. Improving encapsulation ultimately allows inhalable vaccines to be prepared at higher potency, requiring less powder mass per inhaled dose and higher delivery efficiency.
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Affiliation(s)
- Myla Manser
- Department of Chemical Engineering, McMaster University, Hamilton, ON, L8S 4L7, Canada
| | - Blair A Morgan
- Department of Chemical Engineering, McMaster University, Hamilton, ON, L8S 4L7, Canada
| | - Xueya Feng
- McMaster Immunology Research Centre and Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, L8S 4L7, Canada
| | - Rod G Rhem
- Firestone Research Aerosol Laboratory, St. Joseph's Healthcare and Department of Medicine, McMaster University and Hamilton, Hamilton, ON, L8N 4A6, Canada
| | - Myrna B Dolovich
- Firestone Research Aerosol Laboratory, St. Joseph's Healthcare and Department of Medicine, McMaster University and Hamilton, Hamilton, ON, L8N 4A6, Canada
| | - Zhou Xing
- McMaster Immunology Research Centre and Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, L8S 4L7, Canada
| | - Emily D Cranston
- Department of Chemical Engineering, McMaster University, Hamilton, ON, L8S 4L7, Canada.,Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada.,Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Michael R Thompson
- Department of Chemical Engineering, McMaster University, Hamilton, ON, L8S 4L7, Canada.
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Mazzarotta A, Caputo TM, Battista E, Netti PA, Causa F. Hydrogel Microparticles for Fluorescence Detection of miRNA in Mix-Read Bioassay. SENSORS (BASEL, SWITZERLAND) 2021; 21:7671. [PMID: 34833752 PMCID: PMC8624599 DOI: 10.3390/s21227671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 11/20/2022]
Abstract
Herein we describe the development of a mix-read bioassay based on a three-dimensional (3D) poly ethylene glycol-(PEG)-hydrogel microparticles for the detection of oligonucleotides in complex media. The key steps of hydrogels synthesis and molecular recognition in a 3D polymer network are elucidated. The design of the DNA probes and their density in polymer network were opportunely optimized. Furthermore, the diffusion into the polymer was tuned adjusting the polymer concentration and consequently the characteristic mesh size. Upon parameters optimization, 3D-PEG-hydrogels were synthetized in a microfluidic system and provided with fluorescent probe. Target detection occurred by double strand displacement assay associated to fluorescence depletion within the hydrogel microparticle. Proposed 3D-PEG-hydrogel microparticles were designed for miR-143-3p detection. Results showed 3D-hydrogel microparticles with working range comprise between 10-6-10-12 M, had limit of detection of 30 pM and good specificity. Moreover, due to the anti-fouling properties of PEG-hydrogel, the target detection occurred in human serum with performance comparable to that in buffer. Due to the approach versatility, such design could be easily adapted to other short oligonucleotides detection.
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Affiliation(s)
- Alessia Mazzarotta
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia, L.go Barsanti e Matteucci, 53, 80125 Naples, Italy; (A.M.); (T.M.C.); (P.A.N.); (F.C.)
| | - Tania Mariastella Caputo
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia, L.go Barsanti e Matteucci, 53, 80125 Naples, Italy; (A.M.); (T.M.C.); (P.A.N.); (F.C.)
| | - Edmondo Battista
- Interdisciplinary Research Centre on Biomaterials (CRIB), Università degli Studi di Napoli “Federico II”, P.le Tecchio 80, 80125 Naples, Italy
| | - Paolo Antonio Netti
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia, L.go Barsanti e Matteucci, 53, 80125 Naples, Italy; (A.M.); (T.M.C.); (P.A.N.); (F.C.)
- Interdisciplinary Research Centre on Biomaterials (CRIB), Università degli Studi di Napoli “Federico II”, P.le Tecchio 80, 80125 Naples, Italy
- Dipartimento di Ingegneria Chimica del Materiali e della Produzione Industriale, Università degli Studi di Napoli “Federico II”, P.le Tecchio 80, 80125 Naples, Italy
| | - Filippo Causa
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia, L.go Barsanti e Matteucci, 53, 80125 Naples, Italy; (A.M.); (T.M.C.); (P.A.N.); (F.C.)
- Interdisciplinary Research Centre on Biomaterials (CRIB), Università degli Studi di Napoli “Federico II”, P.le Tecchio 80, 80125 Naples, Italy
- Dipartimento di Ingegneria Chimica del Materiali e della Produzione Industriale, Università degli Studi di Napoli “Federico II”, P.le Tecchio 80, 80125 Naples, Italy
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