Hydroxytyrosol oleate: A promising neuroprotective nanocarrier delivery system of oleuropein and derivatives

Olive Phenols (OPs) are known to be potent antioxidants and possess various bioactivities and health benefits. Epidemiological studies suggested that consumption of olive oil reduces the risk of different diseases exerting a protective effect against certain malignant tumors (prostate, breast, digestive tract, endothelium, etc.). However, extremely low absorption rate of olive phenolic compounds restricts their bioactivity. In this context, solid lipid nanoparticles (SLNs) are a promising solution because they provide higher drug stability and can incorporate both lipophilic and hydrophilic drugs. Interesting experimental results have been obtained using hydroxytyrosol oleate (HtyOle) as a main component of a nanoparticle delivery system containing oleuropein (OL), oleuropein aglycone (3,4-DHPEA-EA), or hydroxytyrosol itself (Hty). In this work, hydroxytyrosol oleate (HtyOle) and hydroxytyrosol oleate (HtyOle)-based solid lipid nanoparticles were prepared and characterized. In addition, we evaluatedin vitro their antioxidant activity by DPPH assays and by ROS formation using the SH-SY5Y cell line.

Automated summary

Olive phenols (OPs) are powerful antioxidants with various bioactivities and health benefits. Consumption of olive oil has been shown to reduce the risk of different diseases, especially certain malignant tumors. However, the low absorption rate of OPs limits their bioactivity. Solid lipid nanoparticles (SLNs) provide a promising solution by improving drug stability and the ability to incorporate lipophilic and hydrophilic drugs. This study focused on using hydroxytyrosol oleate (HtyOle) and HtyOle-based SLNs to improve the delivery and antioxidant activity of OPs.