In-vitro evaluation of solid lipid nanoparticles: Ability to encapsulate, release and ensure effective protection of peptides in the gastrointestinal tract.
Int J Pharm
; 565: 409-418, 2019 Jun 30.
Article
in En
| MEDLINE
| ID: mdl-31100381
ABSTRACT
Peptides are rarely orally administrated due to rapid degradation in the gastrointestinal tract and low absorption at the epithelial border. The objective of this study was to encapsulate a model water-soluble peptide in biodegradable and biocompatible solid lipid-based nanoparticles, i.e. Solid Lipid Nanoparticles (SLN) and Nanostructured Lipid Carriers (NLC) in order to protect it from metabolic degradation. Leuprolide (LEU) and a LEU-docusate Hydrophobic Ion Pair (HIP) were encapsulated in SLN and NLC by High Pressure Homogenization. The particles were characterized regarding their Encapsulation Efficiency (EE), size, morphology, peptide release in FaSSIF-V2, and protective effect towards proteases. Nanoparticles of 120â¯nm with platelet structures were obtained. Formation of HIP led to a significant increase in LEU EE. Particle size was moderately affected by the presence of simulated fluids. Nonetheless, an important burst release was observed upon dispersion in FaSSIF-V2. NLC were able to improve LEU-HIP resistance to enzymatic degradation induced by trypsin but presented no advantages in presence of α-chymotrypsin. SLN provided no protection regarding both proteases. Despite an increased amount of encapsulated peptide in solid lipid-based nanoparticles following HIP formation, the important specific surface area linked to their platelet structures resulted in an important peptide release upon dispersion in FaSSIF-V2 and limited protection towards enzymatic degradation.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Surface-Active Agents
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Leuprolide
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Dioctyl Sulfosuccinic Acid
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Nanoparticles
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Lipids
Language:
En
Journal:
Int J Pharm
Year:
2019
Document type:
Article
Affiliation country: