1
|
Bertoni S, Simone E, Sangiorgi S, Albertini B, Passerini N. The use of polymorphic state modifiers in solid lipid microparticles: The role of structural modifications on drug release performance. Eur J Pharm Sci 2024; 192:106650. [PMID: 37995834 DOI: 10.1016/j.ejps.2023.106650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/18/2023] [Accepted: 11/20/2023] [Indexed: 11/25/2023]
Abstract
This study investigates the correlation between the structural and release properties of solid lipid microparticles (MPs) of tristearin containing 5 % w/w of four different liquid additives used as crystal modifiers: isopropyl myristate (IM), ethyl oleate (EO), oleic acid (OA) and medium chain triglycerides (MCT). All additives accelerated the conversion of the unstable α-form of tristearin, formed after the MPs manufacturing, to the stable β-polymorph and the transformation was completed within 24 h (for IM and EO) or 48 h (for OA and MCT). The kinetic of polymorphic transition at 25 °C was investigated by simultaneous synchrotron SAXS/WAXS and DSC analysis after melting and subsequent cooling of the lipid mixture. After crystallization in the α-phase, additives accelerate the solid-solid phase transformation to β-tristearin. SAXS data showed that two types of structural modifications occurred on MPs during storage: compaction of the crystal packing (slight decrease in lamellar thickness) and crystal growth (increased number of stacked lipid lamellae). The release behavior of a model hydrophilic drug (caffeine) at two different amounts (15 % and 30 %) from MPs was studied in water and biorelevant media simulated the gastric and intestinal environment. It was particularly significant that the introduction of IM, EO and MCT were able to prolong the drug release in water, passing from a diffusion-based Higuchi kinetics to a perfect zero-order kinetic. Moreover, the overall release profiles were higher in biorelevant media, where erosion/digestion of MPs was observed. After 6 months, a moderate but statistically significant change in release profile was observed for the MPs with IM and EO, which can be correlated with the time-dependent structural alterations (i.e. larger average crystallite size) of these formulations; while MPs with OA or MCT displayed stable release profiles. These findings help to understand the correlation between release behavior, polymorphism and supramolecular-level structural modification of lipid formulations containing crystal modifiers.
Collapse
Affiliation(s)
- Serena Bertoni
- Department of Pharmacy and Biotechnology, University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| | - Elena Simone
- Department of Applied Science and Technology, Politecnico di Torino, Torino 10129, Italy
| | - Stefano Sangiorgi
- Department of Pharmacy and Biotechnology, University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| | - Beatrice Albertini
- Department of Pharmacy and Biotechnology, University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy.
| | - Nadia Passerini
- Department of Pharmacy and Biotechnology, University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| |
Collapse
|
2
|
Bertoni S, Albertini B, Ronowicz-Pilarczyk J, Passerini N. Tailoring the release of drugs having different water solubility by hybrid polymer-lipid microparticles with a biphasic structure. Eur J Pharm Biopharm 2023; 190:171-183. [PMID: 37517450 DOI: 10.1016/j.ejpb.2023.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/25/2023] [Accepted: 07/28/2023] [Indexed: 08/01/2023]
Abstract
The aim of this study is to investigate the potential of hybrid polymer-lipid microparticles with a biphasic structure (b-MPs) as drug delivery system. Hybrid b-MPs of Compritol®888 ATO as main lipid constituent of the shell and polyethylene glycol 400 as core material were produced by an innovative solvent-free approach based on spray congealing. To assess the suitability of hybrid b-MPs to encapsulate various types of APIs, three model drugs (fluconazole, tolbutamide and nimesulide) with extremely different water solubility were loaded into the polymeric core. The hybrid systems were characterized in terms of particle size, morphology and physical state. Various techniques (e.g. optical, Confocal Raman and Scanning Electron Microscopy) were used to investigate the influence of the drugs on different aspects of the b-MPs, including external and internal morphology, properties at the lipid/polymer interface and drug distribution. Hybrid b-MPs were suitable for the encapsulation of all drugs (encapsulation efficiency > 90 %) regardless the drug hydrophobic/hydrophilic properties. Finally, the drug release behaviors from hybrid b-MPs were studied and compared with traditional solid lipid MPs (consisting of only the lipid carrier). Due to the combination of lipid and polymeric materials, hybrid b-MPs showed a wide array of release profiles that depends on their composition, the type of loaded drug, the drug loading amount and location, providing a versatile platform and allowing the formulators to finely balance the release performance of drugs intended for oral administration. Overall, the study demonstrates that hybrid, solvent-free b-MPs produced by spray congealing are an extremely versatile delivery platform able to efficiently encapsulate and release very different types of drug compounds.
Collapse
Affiliation(s)
- Serena Bertoni
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| | - Beatrice Albertini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy.
| | - Joanna Ronowicz-Pilarczyk
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Jurasza 2, Bydgoszcz 85-089, Poland
| | - Nadia Passerini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| |
Collapse
|
3
|
Ouyang H, Ang SJ, Lee ZY, Hiew TN, Heng PWS, Chan LW. Effect of drug load and lipid-wax blends on drug release and stability from spray-congealed microparticles. Pharm Dev Technol 2022; 27:1069-1082. [PMID: 36422997 DOI: 10.1080/10837450.2022.2152048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This study was designed to evaluate paraffin wax as a potential controlled release matrix for spray congealing and its impact on drug release and stability of the microparticles. Paraffin wax can form a hydrophobic barrier to moisture and reduce drug degradation besides retarding drug release in the gastrointestinal tract. More hydrophilic lipid-based additives can be incorporated to modulate the drug release through the paraffin wax barrier. This study reports the findings of lipid-wax formulations at preserving the stability of moisture-sensitive drugs in spray-congealed microparticles. Aspirin-loaded microparticles formulated with different drug loads, lipid additives, and lipid:wax ratios were produced by spray congealing. Stearic acid (SA), cetyl alcohol (CA), and cetyl ester (CE) were the lipid additives studied. The microparticles were evaluated for yield, encapsulation efficiency, particle size, drug stability, and release. CE exhibited the greatest effect on increasing drug release, followed by CA and SA. Dissolution profiles showed the best fit to Weibull kinetic model. The degree of drug degradation was low, with CA imparting the least protective effect, followed by SA and CE. Paraffin wax is useful for preserving the stability of moisture-sensitive aspirin and retarding its release from spray-congealed microparticles. The addition of lipid additives modulated drug release without compromising drug stability.
Collapse
Affiliation(s)
- Hongyi Ouyang
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Soon Jun Ang
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Zong Yang Lee
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Tze Ning Hiew
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Paul Wan Sia Heng
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Lai Wah Chan
- GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, Singapore, Singapore
| |
Collapse
|
4
|
Figueiredo JDA, Silva CRDP, Souza Oliveira MF, Norcino LB, Campelo PH, Botrel DA, Borges SV. Microencapsulation by spray chilling in the food industry: Opportunities, challenges, and innovations. Trends Food Sci Technol 2022; 120:274-287. [PMID: 36569414 PMCID: PMC9759634 DOI: 10.1016/j.tifs.2021.12.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 12/27/2022]
Abstract
Background The increasing demand for healthy eating habits and the emergence of the COVID-19 pandemic, which resulted in a health crisis and global economic slowdown, has led to the consumption of functional and practical foods. Bioactive ingredients can be an alternative for healthy food choices; however, most functional compounds are sensitive to the adverse conditions of processing and digestive tract, impairing its use in food matrices, and industrial-scale applications. Microencapsulation by spray chilling can be a viable alternative to reduce these barriers in food processing. Scope and approach This review discusses the use of spray chilling technique for microencapsulation of bioactive food ingredients. Although this technology is known in the pharmaceutical industry, it has been little exploited in the food sector. General aspects of spray chilling, the process parameters, advantages, and disadvantages are addressed. The feasibility and stability of encapsulated bioactive ingredients in food matrices and the bioavailability in vitro of solid lipid microparticles produced by spray chilling are also discussed. Main findings and conclusions Research on the microencapsulation of bioactive ingredients by spray chilling for use in foods has shown the effectiveness of this technique to encapsulate bioactive compounds for application in food matrices. Solid microparticles produced by spray chilling can improve the stability and bioavailability of bioactive ingredients. However, further studies are required, including the use of lipid-based encapsulating agents, process parameters, and novel formulations for application in food, beverages, and packaging, as well as in vivo studies to prove the effectiveness of the formulations.
Collapse
Affiliation(s)
- Jayne de Abreu Figueiredo
- Department of Food Science (DCA), Federal University of Lavras, P.O. Box 3037, 37200-900, Lavras, MG, Brazil,Corresponding author. Federal University of Lavras, Department of Food Science (DCA), Laboratory of Packaging and Encapsulation, P.O. Box 3037, 37200-000, Lavras/Minas Gerais, Brazil
| | - Carlos Ramon de Paula Silva
- Department of Food Science (DCA), Federal University of Lavras, P.O. Box 3037, 37200-900, Lavras, MG, Brazil
| | | | - Laís Bruno Norcino
- Biomaterials Engineering, Federal University of Lavras, P.O. Box 3037, 37200-900, Lavras, MG, Brazil
| | - Pedro Henrique Campelo
- Faculty of Agrarian Science, Federal University of Amazonas, 69077-000, Manaus, AM, Brazil
| | - Diego Alvarenga Botrel
- Department of Food Science (DCA), Federal University of Lavras, P.O. Box 3037, 37200-900, Lavras, MG, Brazil
| | - Soraia Vilela Borges
- Department of Food Science (DCA), Federal University of Lavras, P.O. Box 3037, 37200-900, Lavras, MG, Brazil
| |
Collapse
|
5
|
Traub-Hoffmann K, Gegenfurtner K, Kraft KU, Friess W. Spray congealed solid lipid microparticles as a sustained release delivery system for Gonadorelin [6-D-Phe]: Production, optimization and in vitro release behavior. Eur J Pharm Biopharm 2020; 154:18-32. [PMID: 32599272 DOI: 10.1016/j.ejpb.2020.06.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/18/2020] [Accepted: 06/22/2020] [Indexed: 11/20/2022]
Abstract
Sustained release lipid microparticles for a potential veterinary application were produced by the means of spray congealing using saturated triglycerides with respective surfactants. The spray congealing process was optimized using unloaded and loaded microparticles, revealing the highest impact of the spray flow on material loss. Yield could be optimized by increasing the spray flow as well as a reduction of the melt temperature from 90 to 75 °C. For the delivery system developed in this study, a release of around 15 days was targeted. The release profile was in first hand determined with the use of model substances (aspartame and tryptophan), before incorporating the decapeptide Gonadorelin [6-D-Phe]. Release could be controlled between 2 and 28 d, which was dependent on stability of microparticles upon incubation, type and concentration of emulsifier, as well as the used triglyceride. Differential scanning calorimetry and X-ray powder diffraction confirmed the crystallization behavior of C14 and C16-triglycerides in combination with various emulsifiers in different modification without impact on release.
Collapse
|
6
|
Chalella Mazzocato M, Thomazini M, Favaro-Trindade CS. Improving stability of vitamin B12 (Cyanocobalamin) using microencapsulation by spray chilling technique. Food Res Int 2019; 126:108663. [PMID: 31732070 DOI: 10.1016/j.foodres.2019.108663] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 09/06/2019] [Accepted: 09/09/2019] [Indexed: 11/26/2022]
Abstract
Vitamin-B12 or cyanocobalamin is an essential micronutrient, so it must be supplied by diet. However, vitamin-B12 is found just in foods derived from animals and it is sensitive of many factors. Due to the unrelenting increase of people with deficiency in vitamin-B12 and easy degradation of this vitamin when subjected to adverse conditions, the aim of this research was to produce solid lipid microparticles (SLM) loaded with vitamin-B12 using the spray chilling technique. It was produced 6 SLM (with 0.1 and 1% vitamin and 0, 2.5 and 5% of lecithin) that were analyzed for optical and scanning electron microscopy, size and particles size distribution, water activity, instrumental color, X-ray diffraction, yield and encapsulation efficiency, release profile, besides free and encapsulated vitamin stability for 120 days. It was reported that the SLM presented a spherical shape and smooth surfaces, medium size values varying from 13.28 to 26.99 μm. The yield and encapsulation efficiency values within the range of 80.7 to 99.7% and from 76.7 to 101.1%, respectively. The encapsulation promoted better protection of vitamin-B12 (>91.1% for all formulations after 120 days of storage) when compared to the free one (75.2%). In addition, it was observed a good effect of the presence of soya lecithin in formulations; it promoted a more controlled release of vitamin-B12 in fluids and also shown better stability results. The spray chilling encapsulation technique proved to be a promising alternative, since it protected vitamin-B12 without the necessity of using high temperatures or organic solvents to encapsulate it, besides having a low cost.
Collapse
Affiliation(s)
- Marcella Chalella Mazzocato
- Universidade de São Paulo (USP), Faculdade de Zootecnia e Engenharia de Alimentos (FZEA), Av. Duque de Caxias Norte, 225, CP 23, CEP 13535 900 Pirassununga, SP, Brazil
| | - Marcelo Thomazini
- Universidade de São Paulo (USP), Faculdade de Zootecnia e Engenharia de Alimentos (FZEA), Av. Duque de Caxias Norte, 225, CP 23, CEP 13535 900 Pirassununga, SP, Brazil
| | - Carmen S Favaro-Trindade
- Universidade de São Paulo (USP), Faculdade de Zootecnia e Engenharia de Alimentos (FZEA), Av. Duque de Caxias Norte, 225, CP 23, CEP 13535 900 Pirassununga, SP, Brazil.
| |
Collapse
|
7
|
Qin W, He Y, Guo Z, Zhang L, Wu L, Yin X, Shakya S, Maharjan A, Tang Y, Zhu W, Zhang J. Optimization of taste-masking on ibuprofen microspheres with selected structure features. Asian J Pharm Sci 2019; 14:174-182. [PMID: 32104449 PMCID: PMC7032204 DOI: 10.1016/j.ajps.2018.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/25/2018] [Accepted: 05/21/2018] [Indexed: 11/12/2022] Open
Abstract
The microsphere was a primary particulate system for taste-masking with unique structural features defined by production process. In this article, ibuprofen lipid microspheres of octadecanol and glycerin monostearate were prepared to mask the undesirable taste of ibuprofen via three kinds of spray congealing processes, namely, air-cooling, water-cooling and citric acid solution-cooling. The stereoscopic and internal structures of ibuprofen microspheres were quantitatively analyzed by synchrotron radiation X-ray micro-computed tomography (SR-µCT) to establish the relationship between the preparation process and microsphere architectures. It was found that the microstructure and morphology of the microspheres were significantly influenced by preparation processes as the primary factors to determine the release profiles and taste-masking effects. The sphericity of ibuprofen microspheres congealed in citric acid solution was higher than that of other two and its morphology was more regular than that being congealed in air or distilled water, and the contact angles between congealing media and melted ibuprofen in octadecanol and glycerin monostearate well demonstrated the structure differences among microspheres of three processes which controlled the release characteristics of the microspheres. The structure parameters like porosity, sphericity, and radius ratio from quantitative analysis were correlated well with drug release behaviors. The results demonstrated that the exterior morphology and internal structure of microspheres had considerable influences on the drug release behaviors as well as taste-masking effects.
Collapse
Affiliation(s)
- Wei Qin
- Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yuanzhi He
- Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zhen Guo
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Liu Zhang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Li Wu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xianzhen Yin
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Shailendra Shakya
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Abi Maharjan
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Tang
- Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Weifeng Zhu
- Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Jiwen Zhang
- Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| |
Collapse
|
8
|
Musazzi UM, Dolci LS, Albertini B, Passerini N, Cilurzo F. A new melatonin oral delivery platform based on orodispersible films containing solid lipid microparticles. Int J Pharm 2019; 559:280-288. [PMID: 30690132 DOI: 10.1016/j.ijpharm.2019.01.046] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/16/2019] [Accepted: 01/22/2019] [Indexed: 12/16/2022]
Abstract
An innovative delivery system for melatonin, based on the incorporation of solid lipid microparticles in orodispersible films (ODFs) made of maltodextrin, was designed and developed. Lipid microparticles at two different melatonin concentrations (10 and 20% w/w) were produced by the spray congealing technology using two different lipid carrier (tristearin and hydrogenated castor oil) and characterized in terms of size, solid state, drug loading and drug release pattern. Tristearin microparticles were discarded due to a polymorphic modification of the carrier. The incorporation of hydrogenated castor oil microparticles in ODFs by using the casting method did not alter significantly the shape and dimension of the microparticles and the mechanical properties (elasticity and strength) of the films, which remained acceptable for manufacturing and handling. The in vitro release studies performed in saliva, gastric and intestinal simulated media on ODFs containing melatonin loaded in hydrogenated castor oil microparticles revealed the possibility to combine with an immediate release of the drug and a sustained release over at least 5 h period. In conclusion, the proposed drug delivery system maintains the advantages of ODFs, i.e. the suitability to be swallowed without water, and permits the tuning of drug release according to the clinical needs by modulating the ratio of free and microencapsulated drug in the ODF.
Collapse
Affiliation(s)
- Umberto M Musazzi
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Via G. Colombo 71, 20133 Milano, Italy
| | - Luisa S Dolci
- Department of Pharmacy and BioTechnology, University of Bologna, Via S. Donato 19/2, 40127 Bologna, Italy
| | - Beatrice Albertini
- Department of Pharmacy and BioTechnology, University of Bologna, Via S. Donato 19/2, 40127 Bologna, Italy
| | - Nadia Passerini
- Department of Pharmacy and BioTechnology, University of Bologna, Via S. Donato 19/2, 40127 Bologna, Italy.
| | - Francesco Cilurzo
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Via G. Colombo 71, 20133 Milano, Italy
| |
Collapse
|
9
|
Tomšik A, Šarić L, Bertoni S, Protti M, Albertini B, Mercolini L, Passerini N. Encapsulations of wild garlic (Allium ursinum L.) extract using spray congealing technology. Food Res Int 2018; 119:941-950. [PMID: 30884734 DOI: 10.1016/j.foodres.2018.10.081] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 08/27/2018] [Accepted: 10/27/2018] [Indexed: 01/19/2023]
Abstract
The objective of this study was to incorporate wild garlic (A. ursinum) extract into microparticles (MPs) in order to protect its valuable active compounds and improve its oral bioavailability. For this purpose, spray congealing technology was applied and Gelucire 50/13 (Stearoyl polyoxyl-32 glycerides) was selected as MPs carrier. MPs were characterized in terms of yield, encapsulation efficiency and particle size. Differential scanning calorimetry (DSC) and Fourier-transform infrared spectroscopy (FT-IR) analysis of MPs showed the absence of chemical interactions between carrier and extract and suggested that spray congealing process did not modify nor degrade the encapsulated extract. The encapsulation into MPs led to an improvement of the extract dissolution performance as well as an enhancement in solubility of >18 fold compared to the pure extract. Additionally, MPs were stable over three months showing only a minor decrease in the content of active compounds (allicin and S-methyl methanethiosulfonate) and maintaining a good antimicrobial activity. Therefore, obtained results suggested that the encapsulation of A. ursinum extract in MPs by spray congealing is a promising approach to improve the biopharmaceutical properties of the extract, without affecting its antibacterial activity.
Collapse
Affiliation(s)
- Alena Tomšik
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, Novi Sad 21000, Serbia.
| | - Ljubiša Šarić
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, Novi Sad 21000, Serbia
| | - Serena Bertoni
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum - University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| | - Michele Protti
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum - University of Bologna, Via Belmeloro 6, Bologna 40126, Italy
| | - Beatrice Albertini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum - University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy
| | - Laura Mercolini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum - University of Bologna, Via Belmeloro 6, Bologna 40126, Italy
| | - Nadia Passerini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum - University of Bologna, Via S. Donato 19/2, Bologna 40127, Italy.
| |
Collapse
|
10
|
Albertini B, Di Sabatino M, Melegari C, Passerini N. Formulating SLMs as oral pulsatile system for potential delivery of melatonin to pediatric population. Int J Pharm 2014; 469:67-79. [PMID: 24768728 DOI: 10.1016/j.ijpharm.2014.04.055] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 04/19/2014] [Accepted: 04/22/2014] [Indexed: 12/21/2022]
Abstract
The formulation development of melatonin (MLT) for infants and children with neurodevelopmental difficulties was fully investigated. This population have a higher prevalence of sleep disorders and present special challenges for drug administration and swallowing. To solve these issues, solid lipid microparticles (SLMs) were designed to obtain an oral flexible dosage form constituted by GRAS excipients and a free flow pulsatile delivery system for MLT, able to maintain its release through 8h. Three groups of SLMs were produced by spray congealing and characterized as regards particle size, morphology, flowability, solid state, drug content and release behavior. The SLMs manipulation with milk and yogurt and the MLT stability in these foods were also investigated. Microparticles with different excipient composition were selected to obtain a pulsatile release pattern over 8h. The final delivery platform displayed a prompt release from group I SLMs together with a lag phase of groups II and III SLMs, followed by a repeated MLT release from group II and a prolonged MLT release related to the last group. Finally, MLT was compatible and stable in milk and yogurt suggesting that microparticles sprinkled into food is acceptable for MLT administration to children unable to swallow capsules or tablets.
Collapse
Affiliation(s)
- Beatrice Albertini
- Department of Pharmacy and Biotechnology, University of Bologna, Via San Donato 19/2, Bologna 40127, Italy.
| | - Marcello Di Sabatino
- Department of Pharmacy and Biotechnology, University of Bologna, Via San Donato 19/2, Bologna 40127, Italy
| | - Cecilia Melegari
- Department of Pharmacy and Biotechnology, University of Bologna, Via San Donato 19/2, Bologna 40127, Italy
| | - Nadia Passerini
- Department of Pharmacy and Biotechnology, University of Bologna, Via San Donato 19/2, Bologna 40127, Italy
| |
Collapse
|