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Gugleva V, Andonova V. Drug delivery to the brain – lipid nanoparticles-based approach. PHARMACIA 2023. [DOI: 10.3897/pharmacia.70.e98838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The complex structure of the human brain defines it as one of the most inaccessible organs in terms of drug delivery. The blood-brain barrier (BBB) represents a microvascular network involved in transporting substances between the blood and the central nervous system (CNS) – enabling the entry of nutrients and simultaneously restricting the influx of pathogens and toxins. However, its role as a protective shield for CNS also restricts drug access to the brain. Since many drugs cannot cross the BBB due to unsuitable physicochemical characteristics (i.e., high molecular weight, aqueous solubility, etc.), different technological strategies have been developed to ensure sufficient drug bioavailability. Among these, solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs) are promising approaches thanks to their lipid nature, facilitating their brain uptake, small sizes, and the possibilities for subsequent functionalization to achieve targeted delivery. The review focuses on applying SLNs and NLCs as nanocarriers for brain delivery, outlining the physiological factors of BBB and the physicochemical characteristics of nanocarriers influencing this process. Recent advances in this area have also been summarized.
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Scioli-Montoto S, Sbaraglini ML, Cisneros JS, Chain CY, Ferretti V, León IE, Alvarez VA, Castro GR, Islan GA, Talevi A, Ruiz ME. Novel Phenobarbital-Loaded Nanostructured Lipid Carriers for Epilepsy Treatment: From QbD to In Vivo Evaluation. Front Chem 2022; 10:908386. [PMID: 36059881 PMCID: PMC9428247 DOI: 10.3389/fchem.2022.908386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Pharmacological treatments of central nervous system diseases are always challenging due to the restrictions imposed by the blood–brain barrier: while some drugs can effectively cross it, many others, some antiepileptic drugs among them, display permeability issues to reach the site of action and exert their pharmacological effects. The development of last-generation therapeutic nanosystems capable of enhancing drug biodistribution has gained ground in the past few years. Lipid-based nanoparticles are promising systems aimed to improve or facilitate the passage of drugs through biological barriers, which have demonstrated their effectiveness in various therapeutic fields, without signs of associated toxicity. In the present work, nanostructured lipid carriers (NLCs) containing the antiepileptic drug phenobarbital were designed and optimized by a quality by design approach (QbD). The optimized formulation was characterized by its entrapment efficiency, particle size, polydispersity index, and Z potential. Thermal properties were analyzed by DSC and TGA, and morphology and crystal properties were analyzed by AFM, TEM, and XRD. Drug localization and possible interactions between the drug and the formulation components were evaluated using FTIR. In vitro release kinetic, cytotoxicity on non-tumoral mouse fibroblasts L929, and in vivo anticonvulsant activity in an animal model of acute seizures were studied as well. The optimized formulation resulted in spherical particles with a mean size of ca. 178 nm and 98.2% of entrapment efficiency, physically stable for more than a month. Results obtained from the physicochemical and in vitro release characterization suggested that the drug was incorporated into the lipid matrix losing its crystalline structure after the synthesis process and was then released following a slower kinetic in comparison with the conventional immediate-release formulation. The NLC was non-toxic against the selected cell line and capable of delivering the drug to the site of action in an adequate amount and time for therapeutic effects, with no appreciable neurotoxicity. Therefore, the developed system represents a promising alternative for the treatment of one of the most prevalent neurological diseases, epilepsy.
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Affiliation(s)
- Sebastian Scioli-Montoto
- Laboratory of Bioactive Compounds Research and Development, Department of Biological Sciences, School of Exact Sciences, National University of La Plata, La Plata, Argentina
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
| | - Maria Laura Sbaraglini
- Laboratory of Bioactive Compounds Research and Development, Department of Biological Sciences, School of Exact Sciences, National University of La Plata, La Plata, Argentina
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
| | - Jose Sebastian Cisneros
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
- Research Institute of Theoretical and Applied Physical Chemistry (INIFTA—CONICET—UNLP), Department of Chemistry, School of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Cecilia Yamil Chain
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
- Research Institute of Theoretical and Applied Physical Chemistry (INIFTA—CONICET—UNLP), Department of Chemistry, School of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Valeria Ferretti
- Inorganic Chemistry Center (CEQUINOR—CONICET—UNLP), Department of Chemistry, School of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Ignacio Esteban León
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
- Inorganic Chemistry Center (CEQUINOR—CONICET—UNLP), Department of Chemistry, School of Exact Sciences, National University of La Plata, La Plata, Argentina
- Physiopathology Chair, Biological Sciences Department, School of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Vera Alejandra Alvarez
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
- Institute of Materials Science and Technology Research (INTEMA—CONICET—UNMdP), Mar del Plata, Argentina
| | - Guillermo Raul Castro
- Nanomedicine Research Unit (Nanomed), Federal University of ABC (UFABC), Santo André, Brazil
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC), Partner Laboratory of the Max Planck Institute for Biophysical Chemistry (MPIbpC, MPG), Center for Interdisciplinary Studies (CEI—CONICET), National University of Rosario, Rosario, Argentina
| | - German Abel Islan
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
- Nanobiomaterials Laboratory, Center for Research and Development of Industrial Fermentations (CINDEFI—CONICET—UNLP), School of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Alan Talevi
- Laboratory of Bioactive Compounds Research and Development, Department of Biological Sciences, School of Exact Sciences, National University of La Plata, La Plata, Argentina
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
| | - Maria Esperanza Ruiz
- Laboratory of Bioactive Compounds Research and Development, Department of Biological Sciences, School of Exact Sciences, National University of La Plata, La Plata, Argentina
- National Council for Scientific and Technical Research (CONICET), La Plata, Argentina
- *Correspondence: Maria Esperanza Ruiz, ,
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