1
|
Intranasally administered melatonin core-shell polymeric nanocapsules: A promising treatment modality for cerebral ischemia. Life Sci 2022; 306:120797. [PMID: 35841976 DOI: 10.1016/j.lfs.2022.120797] [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: 02/22/2022] [Revised: 06/30/2022] [Accepted: 07/08/2022] [Indexed: 11/22/2022]
Abstract
AIMS The neurohormone melatonin (MEL) has been reported as a promising neuroprotective molecule, however it suffers pharmaceutical limitations such as poor solubility and low bioavailability, which hinder its pharmacological and clinical potential. In the current work, MEL was loaded in core-shell nanocarrier system; polymeric nanocapsules (PNCs), and assessed for its potential in cerebral ischemia reperfusion injury rat model when administered intranasally. KEY FINDINGS Adopting a D-optimal factorial design, MEL-PNCs were successfully formulated using the nanoprecipitation technique. MEL-PNCs exhibited a particle size ranging from 143.5 to 444 nm, negative zeta potential values ranging from -24.2 to -38.7 mV, cumulative release % for MEL ranging from 36.79 to 41.31 % over 8 h period, with overall good storage properties. The selected MEL-PNCs formulation displayed 8-fold higher permeation than the drug solution across sheep nasal mucosa. MEL-PNCs administered intranasally decreased oxidative stress and hippocampal inflammation, and the histological examination revealed the significant restoration of hippocampal neurons. SIGNIFICANCE MEL-PNCs administered intranasally could be a promising treatment modality in brain ischemia.
Collapse
|
2
|
Lyophilization of Nanocapsules: Instability Sources, Formulation and Process Parameters. Pharmaceutics 2021; 13:pharmaceutics13081112. [PMID: 34452072 PMCID: PMC8400524 DOI: 10.3390/pharmaceutics13081112] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 01/20/2023] Open
Abstract
Polymeric nanocapsules have gained more and more interest in the medical sciences. Their core-shell structure offers numerous advantages, especially regarding their use as drug delivery systems. This review begins by presenting the different intrinsic sources of the instability of nanocapsules. The physical and chemical potential instabilities of nanocapsules reduce their shelf-life and constitute a barrier to their clinical use and to their commercialization. To overcome these issues, lyophilization is often used as a process of choice in the pharmaceutical industry especially when labile compounds are used. The state of the art of lyophilization nanocapsules is reviewed. The formulation properties and the process parameters are discussed for a complete understanding of their impact on the stability and storage of the final dried product. To assess the quality of the dried product, various characterization methods are also discussed.
Collapse
|
3
|
Ballhausen A, Przybilla MJ, Jendrusch M, Haupt S, Pfaffendorf E, Seidler F, Witt J, Hernandez Sanchez A, Urban K, Draxlbauer M, Krausert S, Ahadova A, Kalteis MS, Pfuderer PL, Heid D, Stichel D, Gebert J, Bonsack M, Schott S, Bläker H, Seppälä T, Mecklin JP, Ten Broeke S, Nielsen M, Heuveline V, Krzykalla J, Benner A, Riemer AB, von Knebel Doeberitz M, Kloor M. The shared frameshift mutation landscape of microsatellite-unstable cancers suggests immunoediting during tumor evolution. Nat Commun 2020; 11:4740. [PMID: 32958755 PMCID: PMC7506541 DOI: 10.1038/s41467-020-18514-5] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 08/21/2020] [Indexed: 02/06/2023] Open
Abstract
The immune system can recognize and attack cancer cells, especially those with a high load of mutation-induced neoantigens. Such neoantigens are abundant in DNA mismatch repair (MMR)-deficient, microsatellite-unstable (MSI) cancers. MMR deficiency leads to insertion/deletion (indel) mutations at coding microsatellites (cMS) and to neoantigen-inducing translational frameshifts. Here, we develop a tool to quantify frameshift mutations in MSI colorectal and endometrial cancer. Our results show that frameshift mutation frequency is negatively correlated to the predicted immunogenicity of the resulting peptides, suggesting counterselection of cell clones with highly immunogenic frameshift peptides. This correlation is absent in tumors with Beta-2-microglobulin mutations, and HLA-A*02:01 status is related to cMS mutation patterns. Importantly, certain outlier mutations are common in MSI cancers despite being related to frameshift peptides with functionally confirmed immunogenicity, suggesting a possible driver role during MSI tumor evolution. Neoantigens resulting from shared mutations represent promising vaccine candidates for prevention of MSI cancers.
Collapse
Affiliation(s)
- Alexej Ballhausen
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Moritz Jakob Przybilla
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Michael Jendrusch
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Saskia Haupt
- Engineering Mathematics and Computing Lab (EMCL), Interdisciplinary Center for Scientific Computing (IWR), Heidelberg University, Heidelberg, Germany
| | - Elisabeth Pfaffendorf
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Florian Seidler
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Johannes Witt
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Alejandro Hernandez Sanchez
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Katharina Urban
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Markus Draxlbauer
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Sonja Krausert
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Aysel Ahadova
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Martin Simon Kalteis
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Pauline L Pfuderer
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Daniel Heid
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Damian Stichel
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Johannes Gebert
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Maria Bonsack
- Immunotherapy and Immunoprevention, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Vaccine Design, German Center for Infection Research (DZIF), partner site Heidelberg, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Sarah Schott
- Department of Obstetrics and Gynecology, University Hospital Heidelberg, Heidelberg, Germany
| | - Hendrik Bläker
- Institute of Pathology, University Hospital Leipzig, Leipzig, Germany
| | - Toni Seppälä
- Department of Gastrointestinal Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Jukka-Pekka Mecklin
- Department of Education and Research, Central Finland Central Hospital, Jyväskylä, Finland
- Department of Sports and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Sanne Ten Broeke
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Maartje Nielsen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Vincent Heuveline
- Engineering Mathematics and Computing Lab (EMCL), Interdisciplinary Center for Scientific Computing (IWR), Heidelberg University, Heidelberg, Germany
| | - Julia Krzykalla
- Division of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Axel Benner
- Division of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Angelika Beate Riemer
- Immunotherapy and Immunoprevention, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Vaccine Design, German Center for Infection Research (DZIF), partner site Heidelberg, Heidelberg, Germany
| | - Magnus von Knebel Doeberitz
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany
| | - Matthias Kloor
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany.
- Collaboration Unit Applied Tumor Biology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University Hospital and EMBL, Heidelberg, Germany.
| |
Collapse
|
4
|
Reconstituted spray-dried phenytoin-loaded nanocapsules improve the in vivo phenytoin anticonvulsant effect and the survival time in mice. Int J Pharm 2018; 551:121-132. [DOI: 10.1016/j.ijpharm.2018.09.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/28/2018] [Accepted: 09/12/2018] [Indexed: 12/18/2022]
|
5
|
de Andrade DF, de Oliveira EG, Pohlmann AR, Guterres SS, Külkamp-Guerreiro IC, Beck RCR. Fluid bed granulation as an innovative process to produce dry redispersible nanocapsules: Influence of cationic coating of particles. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.12.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
6
|
Andrade DFD, Vukosavljevic B, Benvenutti EV, Pohlmann AR, Guterres SS, Windbergs M, Beck RCR. Redispersible spray-dried lipid-core nanocapsules intended for oral delivery: the influence of the particle number on redispersibility. Pharm Dev Technol 2017; 23:414-425. [PMID: 29095657 DOI: 10.1080/10837450.2017.1400559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This study proposes a new approach to produce easily redispersible spray-dried lipid-core nanocapsules (LNC) intended for oral administration, evaluating the influence of the particle number density of the fed sample. The proposed approach to develop redispersible spray-dried LNC formulations intended for oral route is innovative, evidencing the needing of an optimization of the initial particle number density in the liquid suspension of nanocapsules. A mixture of maltodextrin and L-leucine (90:10 w/w) was used as drying adjuvant. Dynamic light scattering, turbidimetry, determination of surface area and pore size distribution, electron microscopy and confocal Raman microscopy (CRM) were used to characterize the proposed system and to better understand the differences in the redispersion behavior. An easily aqueous redispersion of the spray-dried powder composed of maltodextrin and L-leucine (90:10 w/w) was obtained, depending on the particle number density. Their surface area decreased in the presence of LNC. CRM enabled the visualization of the spatial distribution of the different compounds in the powders affording to better understand the influence of the particle number density of the fed sample on their redispersion behavior. This study shows the need for optimizing initial particle number density in the liquid formulation to develop redispersible spray-dried LNC powders.
Collapse
Affiliation(s)
- Diego Fontana de Andrade
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Branko Vukosavljevic
- c Department of Biopharmaceutics and Pharmaceutical Technology , Saarland University , Saarbruecken , Germany.,d Department of Drug Delivery , Helmholtz Centre for Infection Research (HZI) and Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) , Saarbruecken , Germany
| | - Edilson Valmir Benvenutti
- b Departamento de Química Orgânica, Instituto de Química , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Adriana Raffin Pohlmann
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil.,b Departamento de Química Orgânica, Instituto de Química , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Sílvia Stanisçuaski Guterres
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Maike Windbergs
- c Department of Biopharmaceutics and Pharmaceutical Technology , Saarland University , Saarbruecken , Germany.,d Department of Drug Delivery , Helmholtz Centre for Infection Research (HZI) and Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) , Saarbruecken , Germany
| | - Ruy Carlos Ruver Beck
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| |
Collapse
|
7
|
Dos Reis Antunes Junior O, Antônio E, Mainardes RM, Khalil NM. Preparation, physicochemical characterization and antioxidant activity of diphenyl diselenide-loaded poly(lactic acid) nanoparticles. J Trace Elem Med Biol 2017; 39:176-185. [PMID: 27908412 DOI: 10.1016/j.jtemb.2016.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 09/17/2016] [Accepted: 09/30/2016] [Indexed: 10/20/2022]
Abstract
In this study, we developed, characterized and evaluated the antioxidant activity of poly (lactic acid) nanoparticles containing diphenyl diselenide (PhSe)2. Nanoparticles were characterized in terms of mean particle size, polydispersity index, zeta potential, encapsulation efficiency, in vitro release profile, physical stability, polymer-drug interactions and thermal properties. Also, the antioxidant activity of nanoparticles on hypochlorous acid (HOCl) was assessed. Nanoparticles presented a mean size of 210nm, had low polydispersity, zeta potential of -24mV, and an encapsulation efficiency over 90%. Differential scanning calorimetry and X-ray diffraction results showed (PhSe)2 is dispersed in PLA matrix in an amorphous state. Lyophilized nanoparticles maintained physical stability over three months, while nanoparticles dispersed in water did not present stability over 7days. In vitro release assay was characterized by a biphasic release pattern with burst effect in 8h followed by a sustained release diffusion governed over 192h. Nanoencapsulation did not alter the antioxidant activity of (PhSe)2 on HOCl. The study concludes these properties of (PhSe)2-loaded nanoparticles can be useful to extend the biological effects of (PhSe)2.
Collapse
Affiliation(s)
- Osmar Dos Reis Antunes Junior
- Laboratory of Pharmaceutical Nanotechnology, Department of Pharmacy, Universidade Estadual do Centro-Oeste/UNICENTRO, Guarapuava/PR, Brazil
| | - Emilli Antônio
- Laboratory of Pharmaceutical Nanotechnology, Department of Pharmacy, Universidade Estadual do Centro-Oeste/UNICENTRO, Guarapuava/PR, Brazil
| | - Rubiana Mara Mainardes
- Laboratory of Pharmaceutical Nanotechnology, Department of Pharmacy, Universidade Estadual do Centro-Oeste/UNICENTRO, Guarapuava/PR, Brazil
| | - Najeh Maissar Khalil
- Laboratory of Pharmaceutical Nanotechnology, Department of Pharmacy, Universidade Estadual do Centro-Oeste/UNICENTRO, Guarapuava/PR, Brazil.
| |
Collapse
|
8
|
Radar charts based on particle sizing as an approach to establish the fingerprints of polymeric nanoparticles in aqueous formulations. J Drug Deliv Sci Technol 2015. [DOI: 10.1016/j.jddst.2015.10.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Ribeiro RF, Motta MH, Härter APG, Flores FC, Beck RCR, Schaffazick SR, de Bona da Silva C. Spray-dried powders improve the controlled release of antifungal tioconazole-loaded polymeric nanocapsules compared to with lyophilized products. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 59:875-884. [PMID: 26652443 DOI: 10.1016/j.msec.2015.10.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 09/24/2015] [Accepted: 10/14/2015] [Indexed: 11/30/2022]
Abstract
This work aimed to obtain solid formulations from polymeric nanocapsules and nanoemulsions containing tioconazole, a broad spectrum antifungal drug. Two dehydration methods were used: spray-drying and freeze drying, using lactose as adjuvant (10%, w/v). The liquid formulations had a mean particle size around 206 nm and 182 nm for nanocapsules and nanoemulsions, respectively, and an adequate polydispersity index. Tioconazole content was close to the theoretical amount (1.0 mg/mL). After drying, the content ranged between 98 and 102%with a mean nanometric size of the dried products after redispersion. Scanning electron microscopy showed that the particles are rounded, sphere-shaped for the dried products obtained by spray-drying, and shapeless and irregular shapes for those obtained by freeze-drying. In the microbiological evaluation, all dried products remained active against the yeast Candida albicans when compared to the original systems. The dried products obtained by spray-drying from nanocapsules presented better control of the tioconazole release when compared to the freeze-drying products.
Collapse
Affiliation(s)
- Roseane Fagundes Ribeiro
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS, 97105-900, Brazil
| | - Mariana Heldt Motta
- Curso de Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS, 97105-900, Brazil
| | - Andréia Pisching Garcia Härter
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS, 97105-900, Brazil
| | - Fernanda Cramer Flores
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS, 97105-900, Brazil
| | - Ruy Carlos Ruver Beck
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Porto Alegre, RS, 90610-000, Brazil
| | - Scheila Rezende Schaffazick
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS, 97105-900, Brazil
| | - Cristiane de Bona da Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS, 97105-900, Brazil.
| |
Collapse
|
10
|
Forim MR, Costa ES, da Silva MFDGF, Fernandes JB, Mondego JM, Boiça Junior AL. Development of a new method to prepare nano-/microparticles loaded with extracts of Azadirachta indica, their characterization and use in controlling Plutella xylostella. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:9131-9. [PMID: 23991702 DOI: 10.1021/jf403187y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Biodegradable nanoparticles have been widely explored as carriers for controlled delivery of therapeutic molecules; however, studies describing the development of nanoparticles as carriers for biopesticide products are few. In this work, a new method to prepare nanoparticles loaded with neem (Azadirachta indica) extracts is presented. In this study, nanoparticles were formulated as colloidal suspension and (spray-dried) powder and characterized by evaluating pH, particle size, zeta potential, morphology, absolute recovery, and entrapment efficiency. A high-performance liquid chromatography method was used for nanoparticle characterization. The best formulations presented absolute recovery and entrapment efficiencies of approximately 100% and a release profile based on swelling and relaxation of the polymer or polymer erosion. The biological data of the formulated products against Plutella xylostella showed 100% larval mortality. The nanoparticle information improved the stability of neem products against ultraviolet radiation and increased their dispersion in the aqueous phase.
Collapse
Affiliation(s)
- Moacir Rossi Forim
- Department of Chemistry, Federal University of São Carlos , Rod. Washington Luiz, Km 235, PB 676, São Carlos, SP 13.565-905, Brazil
| | | | | | | | | | | |
Collapse
|
11
|
Durli TL, Dimer FA, Fontana MC, Pohlmann AR, Beck RCR, Guterres SS. Innovative approach to produce submicron drug particles by vibrational atomization spray drying: influence of the type of solvent and surfactant. Drug Dev Ind Pharm 2013; 40:1011-20. [DOI: 10.3109/03639045.2013.798804] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
12
|
Pohlmann AR, Fonseca FN, Paese K, Detoni CB, Coradini K, Beck RCR, Guterres SS. Poly(ϵ-caprolactone) microcapsules and nanocapsules in drug delivery. Expert Opin Drug Deliv 2013; 10:623-38. [DOI: 10.1517/17425247.2013.769956] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
13
|
Elzoghby AO, Samy WM, Elgindy NA. Novel Spray-Dried Genipin-Crosslinked Casein Nanoparticles for Prolonged Release of Alfuzosin Hydrochloride. Pharm Res 2012; 30:512-22. [DOI: 10.1007/s11095-012-0897-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Accepted: 10/08/2012] [Indexed: 01/27/2023]
|
14
|
Srinarong P, de Waard H, Frijlink HW, Hinrichs WLJ. Improved dissolution behavior of lipophilic drugs by solid dispersions: the production process as starting point for formulation considerations. Expert Opin Drug Deliv 2011; 8:1121-40. [DOI: 10.1517/17425247.2011.598147] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
15
|
El-Badry M. Physicochemical characterization and dissolution properties of meloxicam-gelucire 50/13 binary systems. Sci Pharm 2011; 79:375-86. [PMID: 21773073 PMCID: PMC3134858 DOI: 10.3797/scipharm.1101-22] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Accepted: 04/06/2011] [Indexed: 12/04/2022] Open
Abstract
A solid dispersion of Meloxicam (MX), a poorly soluble, non steroidal anti-inflammatory drug, and Gelucire 50/13 was prepared by spray drying. Spherical microparticles were yielded with smooth surfaces as observed by scanning electron microscopy. According to differential scanning calorimetry and powder X-ray diffractometry analysis, MX was transformed from the crystalline state to the amorphous state as confirmed by the disappearance of its melting peak and the crystalline peaks. The dissolution tests at pH 7.4 revealed that the dissolution rate of encapsulated MX was 2.5-fold higher than that of the corresponding physical mixture and fourfold higher than the drug alone, respectively. The microparticles prepared at a ratio of 1:4 (drug/Gelucire) exhibited a 4-fold higher anti-inflammatory activity on the paw edema of rats in comparison to the drug alone. All in all, this work reveals that spray drying is a suitable technique for preparation of solid dispersions with improved biopharmaceutical and pharmacological characteristics of MX.
Collapse
Affiliation(s)
- Mahmoud El-Badry
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. BOX 2457, Riyadh 11451, Saudi Arabia
| |
Collapse
|
16
|
Vauthier C, Bouchemal K. Processing and Scale-up of Polymeric Nanoparticles. INTRACELLULAR DELIVERY 2011. [DOI: 10.1007/978-94-007-1248-5_16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
17
|
Comparative study of preparation and characterization of enteric and enhanced release omeprazole microparticles. J Drug Deliv Sci Technol 2011. [DOI: 10.1016/s1773-2247(11)50079-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Zhang T, Youan BBC. Analysis of process parameters affecting spray-dried oily core nanocapsules using factorial design. AAPS PharmSciTech 2010; 11:1422-31. [PMID: 20839078 DOI: 10.1208/s12249-010-9516-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Accepted: 08/16/2010] [Indexed: 11/30/2022] Open
Abstract
The purpose of this work was to optimize the process parameters required for the production of spray-dried oily core nanocapsules (NCs) with targeted size and drug yield using a two-level four-factor fractional factorial experimental design (FFED). The coded process parameters chosen were inlet temperature (X(1)), feed flow rate (X(2)), atomizing air flow (X(3)), and aspiration rate (X(4)). The produced NCs were characterized for size, yield, morphology, and powder flowability by dynamic light scattering, electron microscope, Carr's index, and Hausner ratio measurement, respectively. The mean size of produced NCs ranged from 129.5 to 444.8 nm, with yield varying from 14.1% to 31.1%. The statistical analysis indicated an adequate model fit in predicting the effect of process parameters affecting yield. Predicted condition for maximum yield was: inlet temperature 140°C, atomizing air flow 600 L/h, feed flow rate 0.18 L/h, and aspiration air flow set at 100%, which led to a yield of 30.8%. The morphological analysis showed the existence of oily core and spherical nanostructure. The results from powder flowability analysis indicated average Carr's index and Hausner ratio of 42.77% and 1.76, respectively. Spray-dried oily core NCs with size lower than 200 nm were successfully produced, and the FFED proved to be an effective approach in predicting the production of spray-dried NCs of targeted yield.
Collapse
|
19
|
Peltonen L, Valo H, Kolakovic R, Laaksonen T, Hirvonen J. Electrospraying, spray drying and related techniques for production and formulation of drug nanoparticles. Expert Opin Drug Deliv 2010; 7:705-19. [PMID: 20345326 DOI: 10.1517/17425241003716802] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IMPORTANCE OF THE FIELD Spray drying and electrospraying are two widely used liquid atomization-based techniques for production and formulation of drug nanoparticles. The importance of spray drying in particular has increased lately in the production of nanostructured microparticles. The value of the particles is that they maintain the properties of individual nanoparticles but they are micrometer sized. AREAS COVERED IN THIS REVIEW In this review the most important liquid atomization techniques, spray drying and electrospraying, are presented in detail, and a short introduction is presented for other methods, including the aerosol flow reactor method and spray congealing. WHAT THE READER WILL GAIN A description of the possible tailoring processes depending on the technique and process parameters. Different product properties can be achieved; for example, nanosuspensions or dry powder formulations may be produced. TAKE HOME MESSAGE The most important advantage of these techniques as compared with many other particle formation techniques is that the production of dried powders is possible without any extra drying step.
Collapse
Affiliation(s)
- Leena Peltonen
- University of Helsinki, Division of Pharmaceutical Technology, PO Box 56, 00014 Helsinki Finland.
| | | | | | | | | |
Collapse
|
20
|
Iodinated blood pool contrast media for preclinical X-ray imaging applications – A review. Biomaterials 2010; 31:6249-68. [DOI: 10.1016/j.biomaterials.2010.04.066] [Citation(s) in RCA: 197] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Accepted: 04/29/2010] [Indexed: 11/23/2022]
|
21
|
El-Badry M. Improvement of the in vitro release of omeprazole from suppository bases using Kollicoat IR. J Drug Deliv Sci Technol 2010. [DOI: 10.1016/s1773-2247(10)50064-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
22
|
Ojer P, Salman H, Da Costa Martins R, Calvo J, López de Cerain A, Gamazo C, Lavandera J, Irache J. Spray-drying of poly(anhydride) nanoparticles for drug/antigen delivery. J Drug Deliv Sci Technol 2010. [DOI: 10.1016/s1773-2247(10)50059-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
23
|
EL-Badry M, Alanazi FK, Mahrous GM, Alsarra IA. Effects of Kollicoat IR®and hydroxypropyl-β-cyclodextrin on the dissolution rate of omeprazole from its microparticles and enteric-coated capsules. Pharm Dev Technol 2009; 15:500-10. [DOI: 10.3109/10837450903300171] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
24
|
Nekkanti V, Muniyappan T, Karatgi P, Hari MS, Marella S, Pillai R. Spray-drying process optimization for manufacture of drug–cyclodextrin complex powder using design of experiments. Drug Dev Ind Pharm 2009; 35:1219-29. [DOI: 10.1080/03639040902882264] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
25
|
Yassin AEB, Alanazi FK, El-Badry M, Alsarra IA, Barakat NS, Alanazi FK. Preparation and Characterization of Spironolactone-Loaded Gelucire Microparticles Using Spray-Drying Technique. Drug Dev Ind Pharm 2009; 35:297-304. [DOI: 10.1080/03639040802302157] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
26
|
Vauthier C, Bouchemal K. Methods for the preparation and manufacture of polymeric nanoparticles. Pharm Res 2008; 26:1025-58. [PMID: 19107579 DOI: 10.1007/s11095-008-9800-3] [Citation(s) in RCA: 474] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 12/01/2008] [Indexed: 10/21/2022]
Abstract
This review summarizes the different methods of preparation of polymer nanoparticles including nanospheres and nanocapsules. The first part summarizes the basic principle of each method of nanoparticle preparation. It presents the most recent innovations and progresses obtained over the last decade and which were not included in previous reviews on the subject. Strategies for the obtaining of nanoparticles with controlled in vivo fate are described in the second part of the review. A paragraph summarizing scaling up of nanoparticle production and presenting corresponding pilot set-up is considered in the third part of the review. Treatments of nanoparticles, applied after the synthesis, are described in the next part including purification, sterilization, lyophilization and concentration. Finally, methods to obtain labelled nanoparticles for in vitro and in vivo investigations are described in the last part of this review.
Collapse
Affiliation(s)
- Christine Vauthier
- CNRS UMR 8612, Université Paris Sud-11, 92296, Chatenay-Malabry, France.
| | | |
Collapse
|
27
|
Beck RCR, Pohlmann AR, Guterres SS. Nanoparticle-coated microparticles: preparation and characterization. J Microencapsul 2008; 21:499-512. [PMID: 15513757 DOI: 10.1080/02652040410001729278] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The objective of the present work was to design and prepare new nanoparticle-coated drug-loaded inorganic microparticles by spray-drying using diclofenac as drug model. Previous works presented the process to dry drug-loaded polymeric nanoparticles using silicon dioxide as adjuvant, otherwise in the present proposition the drug is associated with the silicon dioxide and unloaded polymeric nanocapsule or nanosphere suspensions were used as organic coating. Eudragit S100 was chosen because of its gastric resistance. The potential application of polymeric colloidal suspensions as nanocoating for microparticles were evaluated in terms of process yields, encapsulation efficiencies, morphologic analyses and in vitro drug release profiles in buffered media (pH 1.2; 5.0 and 7.4). The results showed the technological feasibility of preparing controlled nanoparticle-coated drug-loaded inorganic microparticles. When the diclofenac was employed as a hydrophilic model, in this salt form, the powders prepared in two steps (core previously prepared) showed an adequate gastroresistance by the use of Eudragit S100. The use of diclofenac as a hydrophobic model (acid form) conducted to powders presenting good gastroresistance when the nanocapsules and triacetin were employed.
Collapse
Affiliation(s)
- R C R Beck
- Programa de Pós-Graduação em Ciências Farmacêuticas. Faculdade de Farmácia, Porto Alegre, RS, Brazil
| | | | | |
Collapse
|
28
|
Wikarsa S, Durand D, Delarbre JL, Baylac G, Bataille B. The Improvement of Ibuprofen Dissolution Rate Through Microparticles Spray Drying Processed in an Aqueous System. Drug Dev Ind Pharm 2008; 34:485-91. [DOI: 10.1080/03639040701743949] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
29
|
Mizoe T, Ozeki T, Okada H. Application of a four-fluid nozzle spray drier to prepare inhalable rifampicin-containing mannitol microparticles. AAPS PharmSciTech 2008; 9:755-61. [PMID: 18563576 DOI: 10.1208/s12249-008-9109-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2008] [Accepted: 04/28/2008] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to use a four-fluid nozzle spray drier as a new one-step method for preparing rifampicin (RFP)-containing mannitol microparticles. A RFP-acetone/methanol (2:1) solution and aqueous solutions of mannitol (MAN) were simultaneously supplied through different liquid passages of a four-fluid nozzle spray drier and then dried to obtain MAN microparticles containing RFP. Using a cascade impactor, the in vitro aerosol performance of RFP powder and RFP-MAN microparticles with 1:5, 1:10, and 1:20 ratios was compared. The in vivo retention of RFP in the lungs of rats after intratracheal administration of 1:20 RFP-MAN microparticles was also compared. The RFP-MAN microparticles had better aerosol performance than RFP powder and delivery to the lung stages improved as the fraction of MAN was increased. For the 1:20 RFP-MAN microparticles, deposition in stages 2-7 was approximately 43%, which is sufficient for treatment. Approximately 8% of the RFP-MAN microparticles were deposited in stages 6-7, which corresponds to alveoli containing alveolar macrophages. The initial retention of RFP in the lung following pulmonary delivery of 1:20 RFP-MAN microparticles was higher than following oral or intravenous administration of RFP, but the elimination was rapid, resulting in the disappearance of RFP from the lung within 4 h. The plasma concentration-time profile of RFP after intratracheal administration of 1:20 RFP-MAN microparticles was consistent with the profile for RFP retention in the lung. Addition of cholesterol or phosphatidylcholine to RFP had little effect on its retention in the lung. The RFP-MAN microparticles were effective for delivery of RFP to the lung, but the RFP rapidly removed from the lung into the blood circulation. This study demonstrated that RFP-containing MAN microparticles prepared in one step using the four-fluid nozzle spray drier efficiently deliver RFP to the lung, although methods must be developed to prolong its retention and improve targeting to alveolar macrophages.
Collapse
|
30
|
Beck RCR, Lionzo MIZ, Costa TMH, Benvenutti EV, Ré MI, Gallas MR, Pohlmann AR, Guterres SS. Surface morphology of spray-dried nanoparticle-coated microparticles designed as an oral drug delivery system. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2008. [DOI: 10.1590/s0104-66322008000200016] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | | | | | - M. I. Ré
- Instituto de Pesquisas Tecnológicas do Estado de São Paulo, Brazil
| | - M. R. Gallas
- Universidade Federal do Rio Grande do Sul, Brazil
| | - A. R. Pohlmann
- Universidade Federal do Rio Grande do Sul, Brazil; Universidade Federal do Rio Grande do Sul, Brazil
| | | |
Collapse
|
31
|
Mizoe T, Ozeki T, Okada H. Preparation of drug nanoparticle-containing microparticles using a 4-fluid nozzle spray drier for oral, pulmonary, and injection dosage forms. J Control Release 2007; 122:10-5. [PMID: 17655963 DOI: 10.1016/j.jconrel.2007.06.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2007] [Revised: 05/28/2007] [Accepted: 06/05/2007] [Indexed: 11/30/2022]
Abstract
We prepared microparticles containing nanoparticles of water-insoluble pranlukast hemihydrate (PLH) using a 4-fluid nozzle spray drier. These particles were designed to improve the absorption of PLH and to allow delivery by oral, pulmonary, and injection routes. Mannitol (MAN) was used as a water-soluble carrier for the microparticles. We orally administered suspensions of PLH powder and PLH-MAN microparticles to rats. We also compared the in vitro aerosol performance of the PLH powder and PLH-MAN microparticles using a cascade impactor, and we compared the delivery of PLH by oral administration of PLH powder and pulmonary delivery of PLH-MAN microparticles at PLH/MAN ratios of 1:4 and 1:10. The absorption of PLH was markedly enhanced by pulmonary deliver of PLH-MAN composite microparticles. The area under the plasma concentration-time curve per dose for pulmonary administration of the 1:4 and 1:10 PLH-MAN microparticles was approximately 85- and 100-fold higher, respectively, than for oral administration of PLH powder. Also, we found that PLH rapidly disappeared from the plasma following injection of PLH aqueous solution or PLH-MAN microparticles dissolved in water. The PLH particles remaining after dissolution of MAN from the 1:10 PLH-MAN microparticles were 200 nm in diameter. Therefore, PLH particles may be captured immediately after injection by reticuloendothelial tissues such as the liver and spleen. This study demonstrated that it is possible to use the 4-fluid spray drier to prepare microparticles containing PLH nanoparticles that that improve drug absorption and can be administered by oral, pulmonary, and injection routes.
Collapse
Affiliation(s)
- Takuto Mizoe
- Laboratory of Pharmaceutics and Drug Delivery, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, Japan
| | | | | |
Collapse
|
32
|
Mizoe T, Beppu S, Ozeki T, Okada H. One-step preparation of drug-containing microparticles to enhance the dissolution and absorption of poorly water-soluble drugs using a 4-fluid nozzle spray drier. J Control Release 2007; 120:205-10. [PMID: 17582644 DOI: 10.1016/j.jconrel.2007.05.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 04/24/2007] [Accepted: 05/01/2007] [Indexed: 10/23/2022]
Abstract
We studied the use of a 4-fluid nozzle spray drier as a new one-step method for preparing drug-containing microparticles to enhance the dissolution and absorption of poorly water-soluble drugs. We employed ethenzamide (EZ) and flurbiprofen (FP) as poorly water-soluble drugs and lactose (LAC) and mannitol (MAN) as water-soluble carriers for microparticles. EZ-ethanol or FP-acetone/methanol (2:1) solutions and aqueous solutions of LAC or MAN were simultaneously supplied through different liquid passages of a 4-fluid nozzle spray drier and then dried to obtain LAC or MAN microparticles containing EZ or FP. The dissolution of EZ from the EZ/LAC and EZ/MAN microparticles was much faster than that from EZ powder. The dissolution of EZ was more rapid from the EZ/MAN microparticles than the EZ/LAC microparticles. The dissolution of FP from the FP/MAN microparticles was greatly enhanced because of large effective surface area of FP dispersed in microparticles following rapid dissolution of MAN. The absorption of FP after oral administration of the FP/MAN microparticles to rats was markedly increased. The results demonstrate that the 4-fluid nozzle spray drier can be used for the one-step preparation of drug-containing microparticles that enhance the dissolution and absorption of poorly water-soluble drugs and that overcome the problem of finding a common solvent for drugs and carriers.
Collapse
Affiliation(s)
- Takuto Mizoe
- Laboratory of Pharmaceutics and Drug Delivery, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | | | | | | |
Collapse
|
33
|
Tewa-Tagne P, Degobert G, Briançon S, Bordes C, Gauvrit JY, Lanteri P, Fessi H. Spray-drying nanocapsules in presence of colloidal silica as drying auxiliary agent: formulation and process variables optimization using experimental designs. Pharm Res 2007; 24:650-61. [PMID: 17318421 DOI: 10.1007/s11095-006-9182-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Accepted: 10/19/2006] [Indexed: 10/23/2022]
Abstract
PURPOSE Spray-drying process was used for the development of dried polymeric nanocapsules. The purpose of this research was to investigate the effects of formulation and process variables on the resulting powder characteristics in order to optimize them. MATERIALS AND METHODS Experimental designs were used in order to estimate the influence of formulation parameters (nanocapsules and silica concentrations) and process variables (inlet temperature, spray-flow air, feed flow rate and drying air flow rate) on spray-dried nanocapsules when using silica as drying auxiliary agent. The interactions among the formulation parameters and process variables were also studied. Responses analyzed for computing these effects and interactions were outlet temperature, moisture content, operation yield, particles size, and particulate density. Additional qualitative responses (particles morphology, powder behavior) were also considered. RESULTS Nanocapsules and silica concentrations were the main factors influencing the yield, particulate density and particle size. In addition, they were concerned for the only significant interactions occurring among two different variables. None of the studied variables had major effect on the moisture content while the interaction between nanocapsules and silica in the feed was of first interest and determinant for both the qualitative and quantitative responses. The particles morphology depended on the feed formulation but was unaffected by the process conditions. CONCLUSION This study demonstrated that drying nanocapsules using silica as auxiliary agent by spray drying process enables the obtaining of dried micronic particle size. The optimization of the process and the formulation variables resulted in a considerable improvement of product yield while minimizing the moisture content.
Collapse
Affiliation(s)
- Patrice Tewa-Tagne
- Laboratoire d'Automatique et de Génie des Procédés (LAGEP), UMR 5007 CNRS-UCB Lyon 1, ISPB-UCB Lyon 1, Villeurbanne Cedex, France
| | | | | | | | | | | | | |
Collapse
|
34
|
Tewa-Tagne P, Briançon S, Fessi H. Spray-dried microparticles containing polymeric nanocapsules: Formulation aspects, liquid phase interactions and particles characteristics. Int J Pharm 2006; 325:63-74. [PMID: 16872767 DOI: 10.1016/j.ijpharm.2006.06.025] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2006] [Revised: 06/09/2006] [Accepted: 06/17/2006] [Indexed: 11/15/2022]
Abstract
Up to now, the full potential of polymer-based nanoparticles is not yet exploited because of a lack of stability when conserved in aqueous medium. The present paper reports the water elimination from nanocapsules (NC) dispersions by means of the spray-drying technique with the aim to achieve dried solid forms of interest using colloidal silicon dioxide as drying auxiliary. The influence of formulation parameters on the suspension behaviour and on the powders characteristics was also evaluated. Our findings demonstrated that the mixing protocol, the concentrations of both NC and silica are crucial parameters that affect the feed behaviour and the spray-dried particles characteristics. Interactions occurring in the feed are directed by hydrogen bounds and were more sensitive to the silica concentration than that of NC as evidenced by rheological measurements. The NC are entrapped within solid dried matrixes following their interaction with silica particles in the feed. SEM analyses of the obtained powders showed spherical separated microparticles formed by the association of NC and silica when they are mixed at adequate concentrations in the feed before spray-drying. On the other hand, fused agglomerated particles presenting NC at their surface, characterised by irregular shapes and a strong adhesiveness were prepared when the silica concentration was not sufficient. The surface composition of the spray-dried powders was investigated using the ESCA technique and revealed the NC exclusion from the surface to obtain powders suitable for further handling.
Collapse
Affiliation(s)
- Patrice Tewa-Tagne
- Laboratoire de Génie Pharmacotechnique et Biogalénique, ISPB Faculté de Pharmacie (UCB Lyon I), 8 avenue Rockefeller, 69373 Lyon Cedex 08, France
| | | | | |
Collapse
|
35
|
Ozeki T, Beppu S, Mizoe T, Takashima Y, Yuasa H, Okada H. Preparation of two-drug composite microparticles to improve the dissolution of insoluble drug in water for use with a 4-fluid nozzle spray drier. J Control Release 2006; 107:387-94. [PMID: 16126298 DOI: 10.1016/j.jconrel.2005.06.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Accepted: 06/03/2005] [Indexed: 11/20/2022]
Abstract
In this study, we used a novel 4-fluid nozzle spray drier to prepare composite microparticles of a water-insoluble drug, flurbiprofen (FP), and a water-soluble drug, sodium salicylate (SS), for the purpose of improving the water solubility of FP. An ethanol solution of FP and an aqueous SS solution were simultaneously introduced through different liquid passages in the 4-fluid nozzle spray drier and then spray-dried. Quantitative elemental analysis suggested that the FP/SS ratio in each composite microparticle was nearly the same as the formulation ratio. We also found that SS and FP exist in a low crystallinity state in the composite particles. Release of FP from dissolved composite microparticles was markedly improved because of an increase in the effective surface area following rapid dissolution of SS. This study shows that it is possible to prepare FP-SS composite microparticles using a 4-fluid nozzle spray drier in single process and that this can improve the ability of FP to dissolve in water.
Collapse
Affiliation(s)
- Tetsuya Ozeki
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
| | | | | | | | | | | |
Collapse
|
36
|
Raffin Pohlmann A, Weiss V, Mertins O, Pesce da Silveira N, Stanisçuaski Guterres S. Spray-dried indomethacin-loaded polyester nanocapsules and nanospheres: development, stability evaluation and nanostructure models. Eur J Pharm Sci 2002; 16:305-12. [PMID: 12208461 DOI: 10.1016/s0928-0987(02)00127-6] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The industrial development of polymeric nanoparticle suspensions, as drug delivery systems, is limited due to the problems in maintaining stability of suspensions. In this work, a spray-drying technique was applied to dry nanocapsule and nanosphere suspensions prepared by nanoprecipitation of polyesters using SiO(2) as adjuvant. Powders obtained from nanocapsules presented stable drug recoveries and morphological characteristics after 5 months. For nanocapsules, nanostructures around 200 nm were observed by scanning electron microscopy (SEM) on the surface of microparticles of SiO(2), whereas for the nanosphere formulation, nanostructures with a reduced diameter (60-90 nm) were observed, despite the particle sizes of each original suspension being similar, when measured by photon correlation spectroscopy (PCS). In order to investigate the morphological aspects of nanocapsule and nanosphere powders, several nanosphere formulations were spray-dried using different concentrations of SiO(2) and a comparative study of the different colloidal systems (nanocapsules, nanospheres, nanoemulsion or nanodispersion) was carried out by PCS. SEM analyses showed that nanostructures with reduced diameter are formed independently of the adjuvant concentration. The dynamic properties of these systems allowed to suggest that the structure of the nanosphere particle (polymer, sorbitan monostearate and polysorbate 80) was a polymeric matrix dispersing the sorbitan monostearate which, when submitted to the spray-drying process in the presence of SiO(2), gave nanostructures presenting diameters around 80 nm covering the microparticles due to the release of lipophilic surfactant from the polymeric matrix.
Collapse
Affiliation(s)
- Adriana Raffin Pohlmann
- Instituto de Qui;mica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, CP 15003, 91501-970, RS, Porto Alegre, Brazil.
| | | | | | | | | |
Collapse
|
37
|
Guterres SS, Weiss V, de Lucca Freitas L, Pohlmann AR. Influence of benzyl benzoate as oil core on the physicochemical properties of spray-dried powders from polymeric nanocapsules containing indomethacin. Drug Deliv 2000; 7:195-9. [PMID: 11195425 DOI: 10.1080/107175400455119] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
To prepare spray-dried powders of poly(D,L-lactic acid) (PLA) or poly-epsilon-caprolactone (P epsilonC) from colloidal suspensions containing indomethacin (IND) using benzyl benzoate (BnB), nanocapsules (NC) were prepared by nanoprecipitation. To select the best NC formulations, increasing drug concentrations were tested (1.0, 1.5, or 2.0 mg/mL). The particle size was measured by Nanosizer. Spray-dried powders (SDP) were prepared by addition of Aerosil 200 into suspensions of NC. IND was assayed by HPLC. Free IND was determined using an Ultrafree. NC-SPD were examined under SEM. The particle sizes of all formulations are in the sub-300 nm range and are IND-associated, with drug recovery close to 100%. After 1 month, the formulations with highest drug content (2.0 mg/mL) showed a decline of total quantity of IND. After spray-drying, IND recovery for SDP presented values above 100%, indicating that the drug was concentrated from loss of mass during the process. To verify the relationship of oil phase with this loss of mass, similar NC (IND 1.5 mg/mL) prepared with Miglyol 810 (MI) were spray-dried, and SEM analysis showed nanostructures adsorbed onto SiO2. Similar nano-structures were not visualized for NC samples prepared with BnB. A swelling experiment showed the complete dissolution of both polymer by the BnB, whereas for MI the polymer masses remained unchanged. In conclusion, BnB is a solvent for PLA and P epsilonC and this ester is entrained during spray-drying. Despite the use of BnB in formulations of NC, PLA, or P epsilonC, colloidal suspensions prepared with BnB could be micelles instead of nanocapsules.
Collapse
Affiliation(s)
- S S Guterres
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
| | | | | | | |
Collapse
|