Preparation and Characterization of Kynurenic Acid Occluded in Sol-Gel Silica and SBA-15 Silica as Release Reservoirs

Kynurenic acid (KYNA) may have important therapeutic effects in neurological disorders; however, its use as a neuroprotective agent is restricted due to its very limited ability to cross the blood brain barrier (BBB). For this reason, we are looking for new alternatives for KYNA to reach the brain;...

Full description

Saved in:
Bibliographic Details
Published inJournal of nanomaterials Vol. 2014; no. 2014; pp. 1 - 8
Main Authors Carrillo-Mora, Paul, Pérez-de la Cruz, Verónica, Gómez, Esteban, Ortiz, Emma, López Goerne, T. M., Novaro, Octavio
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2014
Hindawi Limited
Subjects
Acids
Biocompatibility
Blood-brain barrier
Brain
Brain diseases
Drug delivery systems
Drugs
Electronics
Ethanol
Mathematical analysis
Metabolites
Methods
Nanomaterials
Neurosciences
Neurosurgery
Reservoirs
Silicon dioxide
Sol gel process
Mexico
Online AccessGet full text

Cover

More Information
Summary:Kynurenic acid (KYNA) may have important therapeutic effects in neurological disorders; however, its use as a neuroprotective agent is restricted due to its very limited ability to cross the blood brain barrier (BBB). For this reason, we are looking for new alternatives for KYNA to reach the brain; one of them is using drug delivery systems. To obtain KYNA release reservoirs, KYNA molecules were hosted in two different silica materials. The different KYNA-silica materials were characterized by means of several physical techniques. The spectroscopic studies showed that KYNA molecules remained unchanged once hosted in silica materials. The surface area values of KYNA-silica samples were substantially lower than those for pure silica materials due to the addition of the drug. The electronic micrographs showed that the sol-gel KYNA-silica material consisted of aggregates of nanoparticles around 50 nm in size. On the other hand, the typical SBA-15 hexagonal arrangement was observed, even when hosting KYNA molecules. KYNA release profiles, carried out during approximately 300 hours, showed a first stage of fast drug release followed by a slow release phase. The experimental values fitted to the Peppas equation indicate that the release mechanism was controlled by Fickian diffusion.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1687-4110
1687-4129
DOI:10.1155/2014/507178